inflatable airbag for making culvert

Hebei ZaoQiang DaCheng Rubber Co., Ltd. is established in 1996, which is seated in Zaoqiang County, Hebei province and integrates with research, production and export business.Our main products include:inflatable pipe plug/bridge bearings/expansion joint/waterstop/inflatable airbag for making culvert.Our products are successively used by many famous companies, and they were exported to 18 countries, including Canada, German, USA, Russia and so on.

2013年11月28日星期四

PVC water stops

PVC water stops are used in concrete joints subjected to hydrostatic pressures. After being embedded in concrete, PVC water stops fill up the joints to form a continuous watertight diaphragm that prevents the passing of fluid. The water stop must be designed and installed properly to accommodate joint expansions, contraction and lateral & transverse movements. In addition to these considerations the water stop must be compatible with the concrete system and the liquids and chemicals to be contained or controlled.

Advantages
Its basic advantage is in its time of fixing. It works as a sealant and it is fixed on predetermined place while concrete slab is laid. It is easy to installing and easy to weld at site and at required angle & shape.

USES:

Dams
Ponds
Canal lining
Water cisterns
Water refining facilities
Swimming pools
Deck
Construction tunnels
Hydro electricity & thermal plants
Bridges
Refining facilities
Metro constructions
Power plants viaducts
Supporting walls
Flooring settled on ground & foundations
Industrial structures

20th floor,Tower B ,Taiyi Shangcheng,Zhonghua Street,Hengshui City,Hebei Province,China.
Tel: +86-318-8538202
Mob:+86-18678456530
Fax: +86-318-2210707
MSN: ztwqqq1985@hotmail.com
Skype: dachengdc678
Email:dcrubber1996@126.com
jen_dacheng@126.com
ztwqqq1985@hotmail.com
Contact:Jenny Lee

Hydrophilic water stop

This product is made from water-swelling rubber water line to the basis of the ordinary rubber water-stop. The product will swell when contacted with the structures. As a result, the tightness is fastened between them water stop and water-proof performance is improved and the problem of circle seepage which puzzles people in a long time is solved. This series of products have been used widely in some key projects and have gotten excellent results.

Features:
Waterproof wire adopted water-swelling rubber which will be self-swelling when contacted with water. So under the function of waterproof wire ,the concrete and water can seal better, and waterproof performance can be more excellent.The sections divided into high-strength area, water-proof area and the installation area can take unequal thickness structures according to the unique function of every area. So each part of the sections can get uniform and reasonable force.Telescopic holes’ outer wall is plane; formwork folder system contact surface is large in construction and difficult to dislocation.Setting hole designed on the installation area is convenient to fix with the nearest steel bar, difficult to move , construction easily and install firmly.

Application
It can be widely applied to various type of concrete structures , such as: Dams, reservoirs, subway, culverts, tunnels, and other underground works.

2013年11月27日星期三

rubber water stop

Rubber water-stop and water stop rubber is the natural rubber and various kinds of synthetic rubber as the main raw material, adding various additives and fillers, the plastication, mixing, pressing forming.The water stop material has good elasticity, wear resistance, aging resistance and tensile properties, adapt to the deformation ability strong, waterproof properties is good, the temperature range of application for - 45 ℃ - + 60℃. When the temperature more than 70 ℃, and rubber water-stop by strong oxidation or the oil and organic solvent erosion, shall not use rubber water-stop.

Rubber water-stop method of use
Rubber water-stop must take reliable fixed measures, tie bar and a when a mold. Prevent the pouring concrete displacement occurs, guarantee the water stop in concrete in the correct position.
Only in the water stop allow part in perforated hole, for the fixed water stop. Shall not damage the local ontology.
Commonly used fixed method is: the additional reinforcement fixed; Special clamp apparatus fixed; Use galvanized iron wire and template fixed, etc. Regardless of the type of fixed method, for water-stop fixed method should be according to the design requirements of the construction standard. Must ensure that water stop location accurate, no damage to water stop effective local, convenient concrete is poured concrete.

scope
Used in underground structure, dam, reservoir, swimming pools, roofing and other building material and structure deformation joint waterproof.

2013年11月25日星期一

Laminated Neoprene Elastomeric Bridge bearings

Why Laminated Neoprene Elastomeric Bridge bearings?

Neoprene bridge bearings - plain or laminated - elastomeric bearings，Laminated bearings are much easier to install in a bridge than compared to other types of bearing used and require nil maintenance. Unlike most other elastomer, Neoprene rubber under-goes no marked stiffening at low temperature when the thermal contraction of the bridge deck is at maximum. Such stiffening could be deleterious to bearing and / or structure. Correctly-designed and suitably-compounded laminated Neoprene Rubber bridge bearings can be confidently expected to function efficiently for at least a decade.

Advantages of Neoprene Elastomeric bearings.
As efficient bearing plates for pre-cast, pre-stressed concrete or steel beams in bridges and buildings, Neoprene Pads - plain and laminated - manufactured by us permits a smooth and uniform transfer of load from the beam to the substructure and allow beam rotation at the bearing due to deflect ion of the beam under load. They further allow lateral and longitudinal movement of the beam caused by thermal forces. Neoprene Pads have no movable parts and thermal expansion and contraction are absorbed by the pad's ability to give and take in shear. There is no sliding motion between pad and beam or between pad and abutment.

Neoprene bridge bearing specifications.
The material specifications for the elastomeric bearing shall meet all the current requirements of AASHTOM M 251. Construction, of the AASHTO Standard Specifications for Highway Bridges.

Bearing pads and laminated bearings shall be of the compound known as neoprene and shall be cast in molds under pressure and heat. A plain elastomeric bearing pad and steel load distribution plate combination shall be classified as a laminated elastomeric bearing. Test specimens shall be in accordance with ASTM D 3182 or D 3183. Where test specimens are cut from the finished product, a 20 percent variation from the original physical properties is allowed.

Difference between a plain rubber block and laminated elastomeric bearings

The capability of plain rubber block to carry vertical load increases as the number of laminations..mild steel shims increases.

How a plain rubber block and laminated bearing reacts against vertical load.

Plain rubber block under vertical load compressed down where as a laminated bearing bulge out with each laminations absorbing most of the vertical load.

How a plain rubber block and laminated bearing reacts against horizontal load.

2013年11月21日星期四

non-reinforced plain pad bearings/With PTFE sheet bonded to the elastomer/Laminated bearings/Laminated bearings with outer steel plate supplier from China

Non-reinforced bearings can be used in many construction and civil engineering applications to support concrete and steel structures, and where a simple, low-cost rubber separation strip is capable of carrying compressive loads, while at the same time providing translational movement and rotational capacity. Plain pad bearings have a large and varied range of possible applications though these bearings are more typically used in prefabricated structures.
Characteristics:
Non-reinforced elastomer bearings ensure a controlled load distribution and enable stress-free horizontal movements as well as twisting in supports.
They prevent excessive load eccentricities and edge compression.
At the same time, unevenness and deviations from parallelism in bedding surfaces are compensated.

Laminated bearing with PTFE sheet bonded on the elastomer:a virgin PTFE layer is bonded to the elastomer to reduce the friction coefficient with the stainless steel welded to the top steel plate. designed as a free sliding bearing in longitudinal and transversal directions(type DF) Fitted as a fixed bearing in longitudinal or transversal directions by means of steel guides (Type DG)

Tetrafluoro plate type rubber bearing suits to bridges with large span,several spans in continuous,with simply supported beam and continuous plates structure,and large displacement.It can still used as the sliding block in pushing of continuous beam and cross sliding of T-shaped beam.The applications of rectangular and circular tetrafluoro plate type rubber bearing are the same with rectangular and circular general plate type rubber bearing,separately.

Dacheng laminated bearings with simple reinforcement are made up of multiple elastomer layers separated by reinforcing steel plates ,sulfurized and moulded together.can be manufactured in a rectangular or circular shape to meet individual engineering requirements.

General laminated bearings suits to bridges with span less than 30m and small displacement.Different flat shape suits to different bridge span structures :orthogonal bridges adopt rectangular bearing;curvilinear bridges,oblique crossing bridges and cylindrical pier bridges adopt circular bearing.

Dacheng Laminated bearing with external steel plates can be vulcanised directly onto elastomeric bearings with simple reinforcement during production, so securing the bearings to the structure with mechanical fastenings and reducing the risk of slippage. Dacheng can produce various types of bearings depending on the fastening method specified Elastomeric bearings with two external plates and holes or threaded holes for plain anchor bars, for use on in situ cast concrete structures. use on metal structures, or as an anti-lift device; in this latter case, suitable anchor bars must be fitted to the bearings for anchoring purposes.

20th floor,Tower B ,Taiyi Shangcheng,Zhonghua Street,Hengshui City,Hebei Province,China.

Tel: +86-318-8538202

Mob:+86-18678456530

Fax: +86-318-2210707

MSN: ztwqqq1985@hotmail.com

Skype: dachengdc678

Email:dcrubber1996@126.com

jen_dacheng@126.com

ztwqqq1985@hotmail.com

Contact:Jenny Lee

Pipe stoppers/Pneumatic pipe stoppers/Inflatable airbag for pipe supplier from China

Description
Trough the design of professional, this product is used in leaking hunting for drainage pipeline. It is made of high quality compounded rubber and polymer materials, and because of good gas tightness and light weight, it could be used in all kinds of non-pressure and low tension pipeline.

Features
1、Economy practical .It could be used in cast iron pipeline plug, glass fiber reinforced plastics pipeline plug, PVC, PPR pipeline plug, and double wall spiral pipeline plug and so on.
2、Service plugging ,and leak hunting.
3、Elliptic type. It easy to stuff the pipeline and it has good plugging effect.
4、Decay resistance.
5、Super strong expansibility.
6、Light weight and convenient to take, and easy to construct.
Application
Pipe plug with rubber bag is always used in pipe and culvert in order to excreting the sewage and waster water, And also used as the repairing rubber appliance. Because of its various specifications. It can be used to block the stream in various situations.

Working principle

The working principle of rubber pipe plug is made of using high quality rubber sealing gasbag by adding method so that it has expanded ,when the gas pressure of sealing gasbag reach formulary requirement, the sealing balloon will fill in the whole pipeline section, and using the friction blocked leaking ,thus achieved the goal that without ooze water in pipe, Before operation of pipeline work of flow condition, measurement the diameter of air into the sealing pipe, Hold on the side of the rubber pipe plug with air cock ,slowly put the air bag into pipes. Before inflate the airbag, insert it completely in pipe, and connect the barometer and pump, then opened slowly the valve of pressure control table .The air pressure if controlled in safety area outside of pressure marked red,. Taut drawing rope in sleepers on rope binding firm ,through pressure control list, observation data, while if reaches the formulary requirement, close the vales of pressure control, and inflating is end .After that, within 20 minutes, keep connection between pressure control tables and pipe, observe data of air pressure sealing variation ,if everything is normal, and starts the work of pipeline construction.

20th floor,Tower B ,Taiyi Shangcheng,Zhonghua Street,Hengshui City,Hebei Province,China.

Tel: +86-318-8538202

Mob:+86-18678456530

Fax: +86-318-2210707

MSN: ztwqqq1985@hotmail.com

Skype: dachengdc678

Email:dcrubber1996@126.com

jen_dacheng@126.com

ztwqqq1985@hotmail.com

Contact:Jenny Lee

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