CN103528892A - Vertical PCCP (Prestressed Concrete Cylinder Pipe) finished product internal pressure tester - Google Patents

Abstract

The invention discloses a vertical PCCP (Prestressed Concrete Cylinder Pipe) finished product internal pressure tester which comprises a liner, a cylinder bottom, a base, a top cover, a water pipeline system, a gas pipeline system, a swing bolt and an electrical system. As shown in Figure 1, the liner is connected with the top cover by using the swing bolt, and the liner and the base can be connected by using a bolt and can also be welded. The vertical PCCP finished product internal pressure tester has the characteristics of reasonable structure, convenience for implementation and the like.

Description

A vertical PCCP product internal pressure testing machine

technical field

The invention relates to the mechanical field, in particular to a vertical PCCP finished product internal pressure testing machine.

Background technique

Prestressed concrete cylinder pipe (Prestressed concrete cylinder pipe) referred to as PCCP, is a new type of pipe developed in my country in the past 20 years. In the pipelines of water supply and drainage, industrial water transmission, power plant water supply, cooling water circulation system and pressure tunnel. The finished product internal pressure testing machine is the supporting testing equipment for testing the internal pressure crack resistance of this kind of composite pipe, and it is also one of the necessary equipment for the production enterprise to obtain the PCCP production qualification. How to determine the main structural parameters such as the liner, top cover, cylinder bottom and water piping system in the hydraulic testing machine is the key to the success of the design.

Contents of the invention

The purpose of the invention is to propose a vertical PCCP finished product internal pressure testing machine, which has the characteristics of reasonable structure and convenient implementation.

The technical solution adopted by the present invention to solve its technical problems is that the internal pressure testing machine is composed of an inner container, a cylinder bottom, a base, a top cover, a water pipeline system, an air pipeline system, a joint bolt and an electrical system, as shown in Figure 1 , The inner tank and the top cover are connected by joint bolts, and the inner tank and the base can be connected by bolts or welded.

In the above-mentioned internal pressure testing machine, the connection between the inner tank and the top cover is sealed by an "O" rubber ring to ensure that the water does not leak when the working inner tank of the test pump and the finished pipe are full of pressure.

The above-mentioned top cover is composed of two upper and lower flanges, and every other bolt in the middle is connected by a rib plate, and the upper and lower flanges

A socket ring corresponding to the test PCCP is welded on the plate, and a socket ring corresponding to the PCCP is welded on the bottom cover.

As mentioned above, the water pipeline system consists of a water pump, a pressure test pump, an air displacement ball valve, a drain ball valve, a check valve, a bottom valve, pipelines and electric contact pressure gauges, as shown in Figure 2.

The above air pipeline system is composed of air filter, lubricator, two-position five-way double solenoid valve, gate valve, pipeline and PU pipe, etc.

The invention has the beneficial effects of reasonable structure, convenient implementation, and the pressure that PCCP finished products can withstand.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 schematic diagram of water pipeline system;

In the figure 1. Base, 2. Rubber ring 1, 3. Roller, 4. Pressure test water, 5. Liner, 6. Railing, 7. Rubber ring 2, 8. Top cover, 9. Slip bolt, 10. " O" type rubber ring, 11. Operating platform, 12. Finished PCCP, 13 Ladder, 14. Pool and water system, 15. Electric contact pressure gauge, 16. Water supply port, 17. Check valve, 18. Water pump, 19. Pressure test pump, 20. Bottom valve, 21. Drain valve, 22. Air displacement ball valve.

Detailed ways

As shown in Figure 1, the vertical PCCP finished product internal pressure testing machine is mainly composed of an inner tank, a cylinder bottom, a base, a top cover, a water pipeline system, an air pipeline system, a joint bolt and an electrical system. The inner tank is a steel cylinder that is only subjected to external pressure. The inner tank and the top cover are connected by joint bolts. The inner tank and the base can be connected by bolts or welded. If welding is used, watertightness is required. Inside

The connection between the bladder and the top cover is sealed by an "O" rubber ring to ensure that the water does not leak when the working inner tank of the test pump and the finished pipe are full of pressure. There are 3 guide wheels on the inner tank, when the finished tube is hoisted into the inner tank, the finished tube can be accurately positioned. The top cover is composed of upper and lower flanges, and every other bolt in the middle is connected by a rib plate. The upper and lower flanges are welded with socket rings corresponding to the test PCCP, and the bottom cover is welded with socket rings corresponding to PCCP.

Figure 2 is a schematic diagram of the water pipeline system. As shown in the figure, the water pipeline system consists of water pumps, pressure test pumps, air displacement ball valves, drain ball valves, check valves, bottom valves, pipelines and electric contact pressure gauges. The whole set of water supply pump and valve device is installed on an integral frame, and the water supply pump and valve device is installed above the pool, which is convenient for the pump to absorb water and drain water after the test; the remote transmission electric contact pressure gauge is installed on the inner side of the steel cylinder core; on the electric control box There is a display instrument. When the set test pressure is reached, the pressure gauge will feed back a signal to the control system, and the operation of the pressure test pump can be controlled by using this signal.

The equipment test uses water as the medium, and the water supply adopts the circulating water method. The bottom of the internal pressure testing machine is surrounded by a pool, and the water is pumped out from the pool.

When the pneumatic ball valve control is selected in the water pipeline, the air pipeline system is required. The air pipeline system is composed of air filter, lubricator, two-position five-way double solenoid valve, gate valve, pipeline and PU pipe, etc. There is an exhaust port on the upper part of the liner, and a DN50 air replacement pneumatic ball valve is installed. When the water is filled, the air is discharged from the exhaust port. When the inner wall of the test tube is filled with water, the pipeline of the pneumatic ball valve installed on the exhaust pipeline is discharged If there is water overflowing from the air place, close the pneumatic ball valve, turn off the water pump, and then start the electric pressure test pump to start the pressurization test. After the pressure test, open the air replacement valve and the drain ball valve to remove the test water.

Claims (5)

1. A vertical PCCP finished product internal pressure testing machine, which is characterized in that it is composed of an inner tank, a cylinder bottom, a base, a top cover, a water pipeline system, an air pipeline system, a joint bolt and an electrical system, as shown in Figure 1 , The inner tank and the top cover are connected by joint bolts, and the inner tank and the base can be connected by bolts or welded. 2. A vertical PCCP finished product internal pressure testing machine according to claim 1, characterized in that the connection between the inner tank and the top cover is sealed by an "O" rubber ring to ensure that the inner tank and the finished tube of the test pump work. Water does not leak when the space is full of pressure. 3. The top cover according to claim 1, which is characterized in that it is composed of two upper and lower flanges, and every other bolt in the middle is connected by a rib plate, and the upper and lower flanges are welded with socket rings corresponding to the PCCP test. The socket ring corresponding to PCCP is welded on the bottom cover. 4. According to claim 1, the water pipeline system is characterized by being composed of a water pump, a pressure test pump, an air displacement ball valve, a drainage ball valve, a check valve, a bottom valve, a pipeline and an electric contact pressure gauge, as shown in Figure 2 . 5. The air pipeline system according to claim 1, characterized in that it is composed of an air filter, a lubricator, a two-position five-way dual-electric control solenoid valve, a gate valve, pipelines and PU pipes.

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