CN116952564A - High-pressure check valve test fixture - Google Patents

Abstract

The invention discloses a high-pressure check valve testing tool, which includes: a fixed frame and a fixed part provided on the fixed frame for fixing both ends of the valve to be tested. The fixed part includes a pressure test joint provided on one side of the fixed frame; A conversion joint is provided on the other side of the fixed frame. The pressure test joint is connected with the pressure test pipeline of the valve to be tested to form a pressure inlet. The conversion joint is connected with a flow detection mechanism for detecting the flow coefficient of the valve. The flow detection mechanism includes a threaded short-circuit connected to the conversion joint, a ball valve arranged on the threaded short-connected, a flange short-connected connected to the threaded short-connected, a bolt column set on the flange short-connected and a flange short-connected The high-pressure check valve testing tool of the present invention has a digital display flowmeter on the blue short-circuit, has a simple structure and is convenient to operate, improves the efficiency of testing operations, and brings great convenience to production and use.

Description

A high-pressure check valve testing tool

Technical field

The present invention relates to the technical field of testing equipment, and in particular to a high-pressure check valve testing equipment.

Background technique

High-pressure check valves are key equipment in the field of pipeline engineering. Usually, in order to save the weight and cost of the valve, the end connection is required to be a beveled end. The reserved bevel is conducive to on-site welding and direct connection, but it brings problems to the factory testing of the valve. It is a huge problem that the pressure test cannot be carried out through the conventional flange type pump pressure plate.

Another existing test method is to lengthen the neck of the valve body and weld the pump plate, and then process and saw it after the test. The process is complicated, and the welding operation brings risks to material and test quality and safety, which is another key to the valve. Parameter flow coefficient, design and calibration also requires corresponding testing equipment. Usually, most of the existing testing tools are installed in large system pipelines, and testing resources are limited and time-consuming and labor-intensive.

Contents of the invention

In view of the shortcomings of the existing technology, the present invention provides a high-pressure check valve testing tool, which can measure the flow coefficient, shell strength test and sealing test of the bevel-end type high-pressure check valve. The tool is simple and easy to operate. Convenient and improve the efficiency of testing operations.

In order to solve the above technical problems, the technical solution adopted by the present invention is a high-pressure check valve testing tool, which includes: a fixed frame and a fixed part provided on the fixed frame for fixing both ends of the valve to be tested. The fixed part includes a fixed part provided on There is a pressure test joint on one side of the fixed frame and a conversion joint provided on the other side of the fixed frame. The pressure test joint is connected with the pressure test pipeline of the valve to be tested to form a pressure inlet. The conversion joint is connected with a device for detecting the valve. A flow detection mechanism for flow coefficient. The flow detection mechanism includes a threaded short connection connected to a conversion joint, a ball valve arranged on the threaded short connection, a flange short connection connected to the threaded short connection, and a flange short connection sleeved on the flange short connection. The connected bolt column and the digital flow meter installed on the flange short joint.

In a preferred embodiment of the present invention, a first O-ring is provided between the beveled end of one end of the valve to be tested and the pressure test joint.

In a preferred embodiment of the present invention, a second O-ring is provided between the beveled end of the other end of the valve to be tested and the conversion joint.

In a preferred embodiment of the present invention, the end of the flange short-circuit close to the digital flow meter is an open end.

In a preferred embodiment of the present invention, the fixing bracket includes two sets of symmetrically arranged side plates and a screw nut assembly disposed between the side plates for fixedly clamping the valve to be tested.

The beneficial effects of the present invention are: the high-pressure check valve testing tool of the present invention can measure the flow coefficient, shell strength test and sealing test of the high-pressure check valve with a bevel end type, has a simple structure, is convenient to operate, and improves testing efficiency of work.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts, among which:

Figure 1 is a schematic structural diagram of the high-pressure check valve testing tool of the present invention;

Figure 2 is a cross-sectional view of the high-pressure check valve testing tool of the present invention;

Figure 3 is a schematic diagram of the check valve shell strength test according to the present invention;

Figure 4 is a schematic diagram of the present invention during high and low pressure sealing testing.

Detailed ways

The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Please refer to Figures 1-2. A high-pressure check valve testing tool of the present invention includes: a fixing frame 1 and a fixing portion provided on the fixing frame for fixing both ends of the valve 13 to be tested. The fixing frame includes two sets of symmetrical arrangements. The side plates 101 and the screw nut 102 assembly provided between the side plates for fixing and clamping the valve to be tested. The fixing part includes a pressure test joint 2 provided on one side of the fixing frame and a conversion joint provided on the other side of the fixing frame. 3. The pressure test joint is connected to the pressure test pipeline of the valve to be tested to form a pressure inlet. The conversion joint is connected with a flow detection mechanism for detecting the flow coefficient of the valve. The flow detection mechanism includes a threaded short connection connected to the conversion joint 4. The ball valve 5 is arranged on the threaded short-connector, the flange short-connector 6 is connected to the threaded short-connector, the bolt column 7 is set on the flange short-connector, and the digital flow meter 8 is arranged on the flange short-connector. The conversion joint, threaded short-circuit, and flange short-circuit are connected internally to form a flow test pipeline 9. The end of the flange short-circuit close to the digital flow meter is the open end. The front end of the conversion joint is connected to the valve to be tested, and the back end is connected to the flow rate. The test pipeline can ensure the consistency of the channel, reduce the test flow resistance, and reduce the test error.

When the high-pressure check valve is undergoing a flow test: the beveled end of the left end of the valve to be tested is connected to the pressure test joint, the beveled end of the right end is connected to the conversion joint, and the side plate, pressure test joint and conversion joint are tightened through bolts and nuts. The threaded holes are connected to the threaded short-circuit, ball valve, flange short-circuit, bolt column, and digital display flowmeter in sequence. The threaded hole of the pressure test joint on the left is connected to the pressure test pipeline as the pressure inlet. The end of the digital display flowmeter is not The open end is blocked, and the initial state of the ball valve is closed. After the front-end pressure rises to the required test pressure, turn the ball valve counterclockwise 90° to open the ball valve. After the pressure is released, the fluid passes through a digital flowmeter to monitor the flow rate. According to the measured flow value The pressure difference is calculated by comparing it with the monitored pressure value at the injection pressure inlet, and the flow coefficient is calculated to ensure that the fluid passing capacity of the high-pressure check valve meets the design calibration.

Specifically, a first O-ring 10 is provided between the grooved end of one end of the valve to be tested and the pressure test joint, and a second O-type seal is provided between the grooved end of the other end of the valve to be tested and the conversion joint. Ring 11, pressure resistant and reliable sealing.

When a high-pressure check valve undergoes a shell strength test: Please refer to Figure 3. The grooved ends at both ends of the valve to be tested are connected to two sets of pressure test joints. The two sets of pressure test joints are set between the grooves at both ends of the valve to be tested. O-ring to increase air tightness, tighten the side plate and pressure test joint through bolts and nuts. The threaded hole of the pressure test joint on the left is connected to the pressure test pipeline as the pressure inlet, and the pressure test joint on the right uses a connecting plug. 12. Block the outlet and inject high-pressure fluid about 1.5 times the pressure value of the valve to be tested into the left pressure inlet through external gas injection equipment to detect the sealing of the high-pressure check valve shell.

When performing high and low pressure sealing tests on high-pressure check valves: Please refer to Figure 4. The grooves at both ends of the valve to be tested are connected to two sets of pressure test joints. The two sets of pressure test joints are set between the grooves at both ends of the valve to be tested. O-ring to increase air tightness, tighten the side plate and pressure test joint through bolts and nuts. The threaded hole of the pressure test joint on the right side is connected to the pressure test pipeline as the pressure inlet, and the pressure test joint on the left side is connected with a plug for the outlet. For sealing, use external gas injection equipment to inject high-pressure fluid about 1.1 times the pressure value of the valve to be tested into the right pressure inlet (it can be divided into high and low pressure multiple gas injection tests) to detect the air tightness between the valve body and the valve seat. sex.

The beneficial effects of the invention are: it can measure the flow coefficient, conduct the shell strength test and the sealing test on the bevel end type high-pressure check valve, and has a simple tooling structure and convenient operation, which improves the efficiency of the test operation.

The above are only examples of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention, or directly or indirectly applied in other related technical fields, shall be regarded as Likewise, it is included in the patent protection scope of the present invention.

Claims (5)

1. High pressure check valve test fixture, its characterized in that includes: the fixed frame and set up the fixed part that is used for fixed valve both ends that awaits measuring on the fixed frame, the fixed part is including setting up in the pressure testing joint of mount one side and setting up in the crossover sub of mount opposite side, the pressure testing joint is connected with the pressure testing pipeline of valve that awaits measuring and is formed pressure inlet, be connected with the flow detection mechanism who is used for detecting valve flow coefficient on the crossover sub, flow detection mechanism includes the screw thread short circuit that is connected with the crossover sub, sets up ball valve on the screw thread short circuit, the flange short circuit that is connected with the screw thread short circuit, the bolt post on the flange short circuit is located to the cover and the digital flowmeter of setting on the flange short circuit.

2. The high-pressure check valve testing tool according to claim 1, wherein a first O-shaped sealing ring is arranged between the bevel end of one end of the valve to be tested and the pressure testing joint.

3. The high-pressure check valve testing tool according to claim 2, wherein a second O-shaped sealing ring is arranged between the groove end at the other end of the valve to be tested and the adapter.

4. The high-pressure check valve testing tool according to claim 1, wherein the end of the flange short circuit close to the digital display flowmeter is an opening end.

5. The high-pressure check valve testing tool according to claim 1, wherein the fixing frame comprises two sets of symmetrically arranged side plates and a screw nut assembly arranged between the side plates and used for fixedly clamping the valve to be tested.