High-pressure ball valve pressure resistance test device

Abstract

The utility model relates to the technical field of hydraulic control systems, in particular to a high-pressure ball valve pressure resistance test device which comprises a base and a high-pressure ball valve, handles are symmetrically and fixedly connected to the top of the base, a supporting block is fixedly connected between the two handles, oil ports are symmetrically formed in the supporting block, and the oil ports correspond to an oil inlet and an oil outlet of the high-pressure ball valve. Bolt holes used for fixing a high-pressure ball valve are symmetrically formed in the supporting block and located outside the oil port, bolts are in threaded connection with the interiors of the multiple bolt holes, a high-pressure quick connector is detachably connected to the exterior of the oil port, a pressure applying assembly is detachably connected to the exterior of the high-pressure quick connector, and a positioning assembly is fixedly arranged at the top of the base. According to the scheme, through mutual cooperation of structures such as the pressure applying assembly and the high-pressure quick connector, a pressure-resistant test and a leakproofness test of the high-pressure ball valve are realized, so that the sealing performance of high-pressure sealing is conveniently detected, safe and stable operation of equipment is ensured, the detection cost is favorably reduced, and meanwhile, the maintenance cost is favorably reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic control systems, in particular to a pressure resistance test device for a high-pressure ball valve. Background Art

[0002] In the hydraulic opening and closing system of the water inlet of the hydropower plant, there is a high-pressure ball valve with a normal working pressure of up to 18MPa. In the entire hydraulic system, it acts as the last checkpoint of the safety protection device. If the valve is opened, the door can be quickly closed within 2 minutes.

[0003] At present, in the daily maintenance of the power plant, it has been found many times that the gate has an abnormal downward trend and the oil pump starts frequently. After repeated inspections, it was found that a high-pressure ball valve in the system had an internal leakage and there was no spare part for the valve. After disassembly and inspection, it was found that the seal was cracked. After the maintenance personnel replaced the valve seal, they reinstalled it without pressure testing. The gate still continued to slide down, seriously threatening the safe and stable operation of the hydro-turbine generator set. The overall cost of replacing the new valve is high, and according to the standard requirements, the new valve must pass a 1.25 times pressure test before it can be installed.

[0004] Existing manufacturers and maintenance units use standard test benches to perform performance tests on high-pressure ball valves. This test bench can be used for various performance tests of various hydraulic cylinders (including life, pressure resistance, starting pressure characteristics, etc.), and high-pressure ball valve maintenance only requires pressure resistance tests on the high-pressure ball valves. Therefore, using a standard test bench will have many disadvantages: 1. The equipment has many functions, a complex structure, and a relatively complex operation process; 2. The cost of purchasing the equipment is high, and using the equipment will greatly increase the maintenance cost. For this reason, we propose a high-pressure ball valve pressure resistance test device. Utility Model Content

[0005] The utility model aims to provide a high-pressure ball valve pressure test device, which solves the problem of high cost of existing high-pressure ball valve testing by cooperating with each other through structures such as a support block, a quick connector, a pressure-applying assembly and a positioning assembly.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A high-pressure ball valve pressure resistance test device comprises a base and a high-pressure ball valve, wherein a handle is symmetrically fixedly connected to the top of the base, a support block is fixedly connected between the two handles, oil ports are symmetrically provided inside the support block, and the oil ports correspond to the oil inlet and outlet ports of the high-pressure ball valve, bolt holes for fixing the high-pressure ball valve are symmetrically provided inside the support block and outside the oil ports, bolts are threadedly connected inside the plurality of bolt holes, a high-pressure quick connector is detachably connected to the outside of the oil port, a pressure-applying assembly is detachably connected to the outside of the high-pressure quick connector, and a positioning assembly is fixedly provided on the top of the base.

[0008] Preferably, the pressure-applying assembly comprises an oil pump, an output end of the oil pump is fixedly connected to an oil pipe, a valve is fixedly provided on the outside of the oil pipe, and a switch is fixedly provided on the top of the valve.

[0009] Preferably, a pressure gauge is fixedly provided on the outside of the oil pipe, and one end of the oil pipe away from the oil pump is detachably connected to a high-pressure quick connector.

[0010] Preferably, the positioning assembly includes a fixing plate, the two fixing plates are fixedly mounted on the bottom of the base, the tops of the two fixing plates are rotatably connected to a lead screw, the outsides of the two lead screws are threadedly connected to a slide, the ends of the two lead screws away from the fixing plates are fixedly connected to a knob, and the two slides are against the support block.

[0011] Preferably, the high-pressure ball valve has a sealing groove, and the contact surface between the support block and the high-pressure ball valve is required to have a roughness of less than 3.2 to ensure its sealing performance.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. In this scheme, the pressure-applying components and high-pressure quick connectors cooperate with each other to realize the pressure resistance test and tightness test of the high-pressure ball valve, so as to test the sealing performance of the high-pressure seal, ensure the safe and stable operation of the equipment, and help to reduce the detection cost and maintenance cost. The device has a simple structure and low production cost.

[0014] 2. This solution is equipped with a positioning component, which cooperates with the knob, screw slider and other structures to facilitate rapid positioning of the high-pressure ball valve and maintain the stability of the high-pressure ball valve. At the same time, it can adapt to high-pressure ball valves of different sizes, which is conducive to improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of another viewing angle of the overall structure of the utility model;

[0017] Figure 3 It is a top schematic diagram of the overall structure of the utility model;

[0018] Figure 4 It is a side view of the overall structure of the utility model.

[0019] In the accompanying drawings, the list of parts represented by each number is as follows: 1. Base; 2. Handle; 3. Support block; 4. Oil port; 5. Bolt hole; 6. High-pressure quick connector; 7. Pressure assembly; 701. Oil pump; 702. Oil pipe; 703. Valve; 704. Switch; 705. Pressure gauge; 8. Positioning assembly; 801. Fixing plate; 802. Slide plate; 803. Screw; 804. Knob; 9. High-pressure ball valve; 10. Bolt. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] like Figure 1 - Figure 4 As shown, a high-pressure ball valve pressure test device in the figure includes a base 1 and a high-pressure ball valve 9. A handle 2 is symmetrically fixedly connected to the top of the base 1. The base 1 and the handle 2 are both made of steel. The handle 2 prevents the high-pressure ball valve 9 from tipping over during installation and pressure resistance, and is also convenient for staff to carry. A support block 3 is fixedly connected between the two handles 2. The support block 3 is symmetrically provided with oil ports 4 inside. The oil ports 4 correspond to the inlet and outlet of the high-pressure ball valve 9. Bolt holes 5 for fixing the high-pressure ball valve 9 are symmetrically provided inside the support block 3 and outside the oil ports 4. Bolts 10 are threadedly connected inside the multiple bolt holes 5. The bolts 10 are M5 screws. The bolts 10 should be symmetrically and evenly engaged, and should be engaged according to the torque requirements of the bolts 10. The outside of the oil port 4 is detachably connected with a high-pressure quick connector 6. The high-pressure quick connector 6 The interface between the connector 6 and the oil port 4 should be wrapped with raw tape to ensure its sealing. The outside of the high-pressure quick connector 6 is detachably connected with a pressure component 7, and the pressure component 7 includes an oil pump 701. The oil pump 701 is a high-pressure oil pump. The output end of the oil pump 701 is fixedly connected to an oil pipe 702. A valve 703 is fixedly provided on the outside of the oil pipe 702. A switch 704 is fixedly provided on the top of the valve 703. A pressure gauge 705 is fixedly provided on the outside of the oil pipe 702. The pressure gauge 705 is used to observe the pressure value. The end of the oil pipe 702 away from the oil pump 701 is detachably connected to the high-pressure quick connector 6. The high-pressure quick connector 6 has a self-locking function and is quickly connected to the outlet connector of the oil pump 701. When disassembling, you only need to release the pressure and press the quick connector buckle to quickly pull it out, and it has good sealing. A positioning component 8 is fixedly provided on the top of the base 1.

[0022] For further reference, Figure 1The positioning assembly 8 includes a fixed plate 801, and the two fixed plates 801 are fixedly installed at the bottom of the base 1. The tops of the two fixed plates 801 are rotatably connected with screws 803, and the outer parts of the two screws 803 are threadedly connected with slides 802. The ends of the two screws 803 away from the fixed plates 801 are fixedly connected with knobs 804. The two slides 802 are both against the support block 3. The support block 3 is used to limit the moving direction of the slide 802 to ensure its up and down movement. The positioning assembly 8 can adapt to high-pressure ball valves 9 of different sizes, which is convenient for positioning and installation with the support block 3.

[0023] In addition, it should be noted that the high-pressure ball valve 9 has its own sealing groove, and an O-ring of appropriate size should be installed in the sealing groove of the high-pressure ball valve 9. The internal seal of the high-pressure ball valve 9 is made of polytetrafluoroethylene, and the seal is in a spherical form. In addition, the working pressure is relatively high, and it is easy for the seal to be damaged and internal leakage to occur. When the pressure resistance test and tightness test of the high-pressure ball valve 9 are not available on site, the pressure resistance test and tightness test of the high-pressure ball valve 9 can be carried out by using an oil pump 701, so as to test the sealing performance inside the high-pressure ball valve 9 and ensure the safe and stable operation of the equipment. From an economic point of view, the cost of replacing a seal is much lower than that of replacing a new high-pressure ball valve 9, which can effectively save costs.

[0024] The contact surface between the support block 3 and the high-pressure ball valve 9 requires a roughness of less than 3.2 to ensure its sealing. When the oil pump 701 increases the pressure and reaches 1.25 times the rated working pressure, the pressure is maintained for 30 minutes to observe whether there is a pressure drop in the high-pressure ball valve 9 to determine whether the sealing is good. The device has a maximum pressure resistance of 40MPa. At the same time, the device has a simple structure and a fast test speed, which is convenient for special testing of the high-pressure ball valve 9 and helps reduce maintenance costs.

[0025] To sum up, when using this device, first place the high-pressure ball valve 9 on the outside of the support block 3, then turn the knob 804, the knob 804 drives the screw 803 to rotate, and then drives the slide plate 802 to move, so as to facilitate the positioning of the high-pressure ball valve 9, then pass the bolt 10 through the bolt hole 5 to tighten and fix the high-pressure ball valve 9, at this time, the high-pressure ball valve 9 is in a closed state, then wrap the high-pressure quick connector 6 with raw tape and connect it to the oil pipe 702, when the connection is completed, start the switch 704, and apply pressure through the oil pump 701, when it reaches 1.25 times the working pressure of the high-pressure ball valve 9, close the valve 703 through the switch 704, observe the pressure gauge 705, and there is no pressure drop for half an hour, which means that the high-pressure ball valve 9 is well sealed.

[0026] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A high-pressure ball valve pressure test device, comprising a base (1) and a high-pressure ball valve (9), characterized in that: The top of the base (1) is symmetrically fixedly connected with a handle (2), a support block (3) is fixedly connected between the two handles (2), the inside of the support block (3) is symmetrically provided with oil ports (4), the oil ports (4) correspond to the oil inlet and outlet ports of the high-pressure ball valve (9), the inside of the support block (3) and outside the oil ports (4) are symmetrically provided with bolt holes (5) for fixing the high-pressure ball valve (9), the inside of the plurality of bolt holes (5) are all threadedly connected with bolts (10), the outside of the oil port (4) is detachably connected with a high-pressure quick connector (6), the outside of the high-pressure quick connector (6) is detachably connected with a pressure assembly (7), and a positioning assembly (8) is fixedly provided on the top of the base (1).

2. A high pressure ball valve pressure test device according to claim 1, characterized in that: The pressure-applying assembly (7) comprises an oil pump (701), the output end of the oil pump (701) is fixedly connected to an oil pipe (702), a valve (703) is fixedly provided on the outside of the oil pipe (702), and a switch (704) is fixedly provided on the top of the valve (703).

3. A high pressure ball valve pressure test device according to claim 2, characterized in that: A pressure gauge (705) is fixedly provided on the outside of the oil pipe (702), and one end of the oil pipe (702) away from the oil pump (701) is detachably connected to a high-pressure quick connector (6).

4. A high-pressure ball valve pressure test device according to claim 1, characterized in that: The positioning assembly (8) comprises a fixing plate (801), wherein the two fixing plates (801) are fixedly mounted on the bottom of the base (1), the tops of the two fixing plates (801) are rotatably connected to a lead screw (803), the exteriors of the two lead screws (803) are threadedly connected to a slide plate (802), the ends of the two lead screws (803) away from the fixing plates (801) are fixedly connected to a knob (804), and the two slide plates (802) are in contact with the support block (3).

5. The high-pressure ball valve pressure test device according to claim 1, characterized in that: The high-pressure ball valve (9) has a sealing groove, and the contact surface between the support block (3) and the high-pressure ball valve (9) is required to have a roughness of less than 3.2 to ensure its sealing performance.

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