Large-diameter valve high-pressure cycle test system

Abstract

The utility model relates to the technical field of valve testing, in particular to a high-pressure circulation testing system for a large-diameter valve. Comprising a valve fixing assembly which is used for fixing a to-be-tested valve; the water storage tank is internally provided with circulating water; the pump is connected with the water storage tank and the inlet of the to-be-tested valve through a water inlet pipeline, and the outlet of the to-be-tested valve is connected with the water storage tank through a water outlet pipeline; the valve group is arranged on the water inlet pipeline and the water outlet pipeline and is used for adjusting the closing of the water inlet pipeline and the water outlet pipeline; the monitoring system is used for monitoring the pressure of the water inlet pipeline and the water outlet pipeline; and the rotary valve manual driving device is used for driving the valve to be tested to be opened and closed. The device can be repeatedly used, and is high in cost effectiveness. And one set of system can respectively meet high-pressure cycle test verification of valves with different calibers of 78-108 inches.

Description

Technical Field

[0001] The utility model relates to the technical field of valve testing, in particular to a large-caliber valve high-pressure circulation testing system. Background Art

[0002] Large-diameter valves play an important role in many industrial fields. However, it is challenging to perform high-pressure cycle testing on them to ensure their quality and reliability.

[0003] The cyclic test requirement is one of the valve design verification test requirements in the standard, that is, the valve life test or periodic test. Different specifications have different test requirements. Generally, valve manufacturers have the ability to have a low-pressure (≦150PSI) cyclic test system. The AWWA C516 standard was revised in 2014 to add a high-pressure 250PSI design verification test requirement for large-diameter valves with specifications above 78 inches. In order to meet the AWWA C516 standards and requirements, it is necessary to establish a set of large-diameter valve high-pressure 250PSI cyclic test systems to meet the design verification test requirements for large-diameter valves from 78 inches to 108 inches. The system needs to be improved and upgraded in terms of system component materials, component selection and system design structure to meet the system high-pressure test requirements. Summary of the invention

[0004] In order to solve the above problems, the utility model provides a large-caliber valve high-pressure circulation test system.

[0005] The utility model adopts the following technical scheme: a large-caliber valve high-pressure cycle test system, comprising:

[0006] A valve fixing assembly, wherein the valve fixing assembly is used to fix the valve to be tested;

[0007] A water storage tank, wherein circulating water is arranged in the water storage tank;

[0008] A pump, wherein the pump is connected to the water storage tank and the inlet of the valve to be tested through a water inlet pipeline, and the outlet of the valve to be tested is connected to the water storage tank through a water outlet pipeline;

[0009] A valve group, which is arranged on the water inlet pipeline and the water outlet pipeline and is used to adjust the closing of the water inlet pipeline and the water outlet pipeline;

[0010] A monitoring system, wherein the monitoring system is used to monitor the pressure of the water inlet pipeline and the water outlet pipeline;

[0011] A manual drive device for a rotary valve, wherein the manual drive device for a rotary valve is used to drive the valve to be tested to open and close.

[0012] In some embodiments, the valve retaining assembly includes:

[0013] A valve bracket, wherein the valve bracket is used to fix the valve to be tested;

[0014] The valve cover plate is provided with two valve cover plates, and the valve cover plates are respectively fixed on the front and rear sides of the valve to be tested.

[0015] In some embodiments, the valve support includes a front support and a rear support, a cross brace is connected between the front support and the rear support, and the valve to be tested is mounted between the front support and the rear support.

[0016] In some embodiments, the front bracket includes:

[0017] A horizontal support, wherein the horizontal support is arranged horizontally;

[0018] The columns are arranged in two groups and are respectively fixed at two ends of the horizontal support. The upper ends of the columns are higher than the horizontal support, and oblique braces are arranged between the horizontal support and the columns.

[0019] In some embodiments, the rear bracket has the same structure as the front bracket, and a bottom plate is connected between the bottoms of the columns of the rear bracket and the front bracket.

[0020] In some embodiments, the valve cover plate comprises:

[0021] A circular cover plate, on which a water inlet and outlet are arranged;

[0022] An annular connecting plate is connected to the outer side of the circular cover plate, and a plurality of connecting bolt holes are arranged on the annular connecting plate for connecting with the valve to be tested.

[0023] In some embodiments, a circular reinforcing rib is disposed at the center of the circular cover plate, and a plurality of reinforcing ribs radiate outward from the center.

[0024] In some embodiments, the valve assembly includes:

[0025] A flow control valve I, wherein the flow control valve I is arranged on the water inlet pipeline;

[0026] A flow control valve II, wherein the flow control valve II is arranged between the water inlet pipeline and the water outlet pipeline;

[0027] A flow control valve III is arranged on the water outlet pipeline.

[0028] In some embodiments, the monitoring system comprises:

[0029] A water inlet pressure gauge, which is arranged on the water inlet pipeline;

[0030] An electric contact pressure gauge, which is arranged on the water inlet pipeline;

[0031] A water outlet pressure gauge is arranged on the water outlet pipeline.

[0032] Compared with the prior art, the utility model has the following beneficial effects:

[0033] The utility model has the effects of high precision and high reliability.

[0034] The utility model is adapted to the special requirements of large-diameter valves.

[0035] The utility model is reusable and cost-effective. One system can meet the requirements of high-pressure cycle test verification for valves with different diameters from 78 inches to 108 inches.

[0036] The utility model discloses a data acquisition and control system, which enables the system to automatically record test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is the water circuit schematic diagram of the high-pressure circulation test system for large-caliber valves;

[0038] Figure 2 This is the front view of the valve cover;

[0039] Figure 3 This is the front view of the valve bracket;

[0040] Figure 4 It is a three-dimensional diagram of the valve bracket;

[0041] Figure 5 It is the schematic diagram of the circuit system;

[0042] In the figure, 1-water storage tank, 2-pump, 3-water inlet pressure gauge, 4-flow control valve I, 5-electric contact pressure gauge, 6-flow control valve II, 7-flow control valve III, 8-counter, 9-water inlet plugging cover, 9.1-annular connecting plate, 9.2-connecting bolt hole, 9.3-circular cover plate, 9.4-water inlet and outlet, 9.5-reinforcement rib, 9.6-circular reinforcement rib, 10-water outlet plugging cover, 11-valve to be tested, 12-valve bracket, 12.1-bottom plate, 12.2-column, 12.3-horizontal support, 12.4-cross brace, 12.5-diagonal brace, 13-rotary valve manual drive device, 14-water outlet pressure gauge. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0044] like Figure 1 As shown, a large-caliber valve high-pressure cycle test system comprises:

[0045] A valve fixing assembly is used to fix the valve 11 to be tested.

[0046] Water tank 1, which is provided with circulating water; the design of water tank 1 should meet the circulating water consumption of the test system. Designed according to the maximum caliber of the tested valve: K*(1+0.7)V=1.2*1.7*3.93=8m³, the welding manufacturing volume is 8 cubic meters of water tank, which can meet the water storage use for the circulating test of 78-108 inch valves.

[0047] Pump 2, the pump 2 is connected to the water storage tank and the inlet of the valve 11 to be tested through the water inlet pipeline, and the outlet of the valve 11 to be tested is connected to the water storage tank through the water outlet pipeline; Pump 2 needs to meet the pressure and flow requirements of 250PSI (1.7MPA) input to the system. After measurement and selection, a head of 210m, a flow of 46m³ / h, a multi-stage pressure pump and a 45kW motor are selected to meet the input requirements of the test system.

[0048] A valve group is arranged on the water inlet pipeline and the water outlet pipeline, and is used to adjust the closing of the water inlet pipeline and the water outlet pipeline.

[0049] A monitoring system, wherein the monitoring system is used to monitor the pressure of the water inlet pipeline and the water outlet pipeline;

[0050] The rotary valve manual drive device 13 is used to drive the valve to be tested 11 to open and close. The rotary valve manual drive device is an essential structural component for opening and closing large-diameter valves. It realizes the rated torsion capacity of the transmission device and should meet the operating conditions of the tested valve to control the valve plate so that it is sealed, off the seat and rigidly maintained in any intermediate position. It is purchased from outside.

[0051] The water inlet and outlet pipes are designed with seamless steel pipes with an outer diameter of 108mm (4.25 inches) and a wall thickness of 5mm (0.2 inches), which can bear a maximum pressure of 300PSI (2.1MPA) and meet the standard system pressure design requirements. Similarly, the system components such as the connecting flanges, bolts, flow control valves, and pressure gauges of the supporting pipelines must be designed and selected to meet the system maximum pressure of 300PSI (2.1MPA) and the maximum flow rate of 4.9m / s.

[0052] The valve group includes: a flow control valve I4, which is arranged on the water inlet pipeline; a flow control valve II6, which is arranged between the water inlet pipeline and the water outlet pipeline; and a flow control valve III7, which is arranged on the water outlet pipeline.

[0053] The monitoring system comprises: a water inlet pressure gauge 3, which is arranged on the water inlet pipeline; an electric contact pressure gauge 5, which is arranged on the water inlet pipeline; and a water outlet pressure gauge 14, which is arranged on the water outlet pipeline.

[0054] The valve fixing kit includes:

[0055] A valve bracket, wherein the valve bracket is used to fix the valve 11 to be tested;

[0056] The valve cover plate is provided with two valve cover plates, and the valve cover plates are respectively fixed on the front and rear sides of the valve to be tested 11.

[0057] like Figure 3 , 4 As shown, the valve support includes a front support and a rear support, a cross brace is connected between the front support and the rear support, and the valve 11 to be tested is arranged between the front support and the rear support.

[0058] Among them, the front bracket includes:

[0059] A horizontal support 12.3, wherein the horizontal support 12.3 is arranged horizontally;

[0060] The columns 12.2 are provided in two groups and are respectively fixed at the two ends of the horizontal support 12.3. The upper ends of the columns 12.2 are higher than the horizontal support 12.3. A diagonal support 12.5 is provided between the horizontal support 12.3 and the columns 12.2.

[0061] The rear bracket has the same structure as the front bracket, and a bottom plate is connected between the bottoms of the upright posts of the rear bracket and the front bracket.

[0062] like Figure 2 As shown, the valve cover includes:

[0063] A circular cover plate 9.3, on which a water inlet and outlet 9.4 are arranged;

[0064] The annular connecting plate 9.1 is connected to the outer side of the circular cover plate 9.3. A plurality of connecting bolt holes 9.2 are arranged on the annular connecting plate 9.1 for connecting with the valve 11 to be tested.

[0065] A circular reinforcing rib 9.6 is arranged at the center of the circular cover plate 9.3, and a plurality of reinforcing ribs 9.5 radiate outward from the center.

[0066] The valve cover is divided into an inlet plug cover 9 (the valve cover on the inlet side) and an outlet plug cover 10 (the valve cover on the outlet side). The inlet plug cover and the outlet plug cover are important components in the high-pressure circulation system. The design needs to meet the requirements of bearing and fixing the tested valve and meeting the system pressure of 250PSI (1.7MPA). The design adopts ordinary carbon structural steel with good allowable strength and good weldability for welding. In order to improve the strength and rigidity of the part, the reinforcement ribs are designed to be 90° vertical and horizontal two plus radial six welding reinforcements. This structural design has been tested and verified by 84-inch valves, which is safe and reliable and meets the high-pressure design requirements of the system.

[0067] The water inlet plugging cover 9 and the water outlet plugging cover 10 adopt a high water inlet and high water outlet design, which can stabilize the pressure on both sides of the valve butterfly plate water inlet and water outlet, reduce the pressure difference on both sides, and make the valve safer and more reliable in the system.

[0068] The outlet cover is designed with a high outlet. In order to solve the problem of static system drainage, a low drain outlet and valve are added. When the system is debugged under zero pressure, this valve can be opened to facilitate drainage to the water storage tank.

[0069] Working principle of water system: When the valve disc is open, the water tank 1 is filled with enough water, the water pump is turned on, and the water flows into the pipeline, flows through the flow control valve I4 (fully open), the water inlet pressure gauge 3, the electric contact pressure gauge 5, the water inlet plug 9, the valve to be tested 11 (when the valve disc is open, the system pressure is 0MPA), the water outlet plug 10, the water outlet pressure gauge 14, and the flow control valve 7 (fully open), and the water flows into the water tank 1 to form a closed-circuit water system. When the valve disc is closed, the water pump inputs water flow and pressure. When the pressure reaches the test requirement of 250PSI (1.7MPA), the valve disc is opened to complete a cycle of testing. This cycle is repeated until the number of valve cycle tests required by the standard is completed.

[0070] Furthermore, when the valve plate is closed and the system pressure is insufficient or higher than the test requirement of 250PSI (1.7MPA), the water inlet flow control pipeline system is adjusted to achieve a stable pressure state. When the system pressure is less than 250PSI (1.7MPA), close and adjust the flow control valve 6 until the system pressure is stabilized at 250PSI (1.7MPA); conversely, when the system pressure is higher than 250PSI (1.7MPA), open and adjust the flow control valve 6 until the system pressure is stabilized at 250PSI (1.7MPA). For correct operation, first fully open the flow control valve 6, gradually close and adjust the flow control valve 6, so that the system pressure slowly reaches 250PSI (1.7MPA) and stabilizes the pressure. At this time, the flow control valve 6 stops adjusting and maintaining.

[0071] The entire large-diameter valve high-pressure cycle test system is controlled and signaled through the circuit system.

[0072] like Figure 5 As shown, the circuit system includes a CM contactor, a ZS indicator light power supply, a red indicator light, a yellow indicator light, a green indicator light and a counter connected in parallel, and then connected in series with the high-pressure pump motor.

[0073] The high-pressure pump motor is used to control the switch of the pump. The red indicator light is connected in series with the limit switch contact of the valve driver. The yellow indicator light is connected in series with the electric contact water pressure gauge contact, and an intermediate relay is also connected in parallel to the yellow indicator light. The green indicator light is connected in series with the CM contactor contact.

[0074] Working principle of circuit system: When the valve disc is open, the limit switch contact of the valve driver is away, the high-pressure water pump motor is started, the power supply of the ZS indicator light is turned on, the CM contactor contacts touch, the green indicator light is on, and the ZJ intermediate relay and counter do not work; when the valve disc is closed and the system pressure reaches 250PSI (1.7MPA), the electric contact pressure gauge contacts are closed, the yellow indicator light is on, and the intermediate relay contacts are closed at the same time, and the counter counts. At the same time, when the limit switch contact of the valve driver is closed, the valve is closed and sealed, and the red indicator light is on; when the red indicator light is on, the operator immediately rotates the valve driver handwheel to open the valve, so that the limit switch contact of the valve driver is away, the system is drained and the pressure is relieved until the disc is opened, and the valve cycle test is completed, and then repeated until the counter shows that the number of valve cycle tests required by the standard is completed.

[0075] The signal indicator light design makes it easy for operators to observe and accurately execute valve opening and closing instructions, so that the entire test work can be completed safely and smoothly.

[0076] The valve driver limit switch design enables the valve opening and closing operation commands to be implemented through signal command, making the operation safer, more efficient and accurate.

[0077] The design of the drive device limit switch and signal indicator light enables the operator to observe and react quickly to the operation of opening and closing the valve, making the entire test process safe and efficient.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A large-caliber valve high-pressure cycle test system, characterized in that: include: A valve fixing assembly, wherein the valve fixing assembly is used to fix the valve to be tested; A water storage tank, wherein circulating water is arranged in the water storage tank; A pump, wherein the pump is connected to the water storage tank and the inlet of the valve to be tested through a water inlet pipeline, and the outlet of the valve to be tested is connected to the water storage tank through a water outlet pipeline; A valve group, which is arranged on the water inlet pipeline and the water outlet pipeline and is used to adjust the closing of the water inlet pipeline and the water outlet pipeline; A monitoring system, wherein the monitoring system is used to monitor the pressure of the water inlet pipeline and the water outlet pipeline; A manual drive device for a rotary valve, wherein the manual drive device for a rotary valve is used to drive the valve to be tested to open and close.

2. The large-caliber valve high-pressure cycle test system according to claim 1 is characterized in that: The valve fixing assembly comprises: A valve bracket, wherein the valve bracket is used to fix the valve to be tested; The valve cover plate is provided with two valve cover plates, and the valve cover plates are respectively fixed on the front and rear sides of the valve to be tested.

3. The large-caliber valve high-pressure cycle test system according to claim 2, characterized in that: The valve support comprises a front support and a rear support, a cross brace (12.4) is connected between the front support and the rear support, and the valve to be tested is mounted between the front support and the rear support.

4. The large-caliber valve high-pressure cycle test system according to claim 3 is characterized in that: The front bracket comprises: A horizontal support (12.3), wherein the horizontal support (12.3) is arranged horizontally; The columns (12.2) are provided in two groups and are respectively fixed at two ends of the horizontal support (12.3); the upper ends of the columns (12.2) are higher than the horizontal support (12.3); and an oblique support (12.5) is provided between the horizontal support (12.3) and the columns (12.2).

5. The large-caliber valve high-pressure cycle test system according to claim 4, characterized in that: The rear bracket has the same structure as the front bracket, and a bottom plate (12.1) is connected between the bottoms of the upright posts of the rear bracket and the front bracket.

6. The large-caliber valve high-pressure cycle test system according to claim 2, characterized in that: The valve cover plate comprises: A circular cover plate (9.3), wherein the circular cover plate (9.3) is provided with a water inlet and outlet (9.4); An annular connecting plate (9.1), the annular connecting plate (9.1) being connected to the outside of the circular cover plate (9.3), and a plurality of connecting bolt holes (9.2) being provided on the annular connecting plate (9.1) for connecting to the valve to be tested.

7. The large-caliber valve high-pressure cycle test system according to claim 6, characterized in that: A circular reinforcing rib (9.6) is arranged at the centre of the circular cover plate (9.3), and a plurality of reinforcing ribs (9.5) radiate outward from the centre.

8. The large-caliber valve high-pressure cycle test system according to claim 1, characterized in that: The valve group comprises: A flow control valve I (4), wherein the flow control valve I (4) is arranged on the water inlet pipeline; A flow control valve II (6), wherein the flow control valve II (6) is arranged between the water inlet pipeline and the water outlet pipeline; A flow control valve III (7), wherein the flow control valve III (7) is arranged on the water outlet pipeline.

9. The large-caliber valve high-pressure cycle test system according to claim 1, characterized in that: The monitoring system comprises: A water inlet pressure gauge (3), wherein the water inlet pressure gauge (3) is arranged on the water inlet pipeline; An electric contact pressure gauge (5), wherein the electric contact pressure gauge (5) is arranged on the water inlet pipeline; A water outlet pressure gauge (14), wherein the water outlet pressure gauge (14) is arranged on the water outlet pipeline.

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