Stop valve testing device

Abstract

The utility model discloses a stop valve testing device which comprises a base and a gas pipe, a vertical plate is installed on one side of the top of the base, a surge tank is arranged on the front face of the vertical plate, a first fixing assembly used for fixing the surge tank is installed outside the surge tank, and one end of the first fixing assembly is connected with the surface of the vertical plate; a pressure regulator is mounted on one side of the top of the gas pipe; the stop valve is set through the device, standardized operation of the stop valve is achieved, the setting precision of the stop valve is improved, meanwhile, whether the stop valve conforms to technical indexes or not is detected, errors of manual operation and a spring pressure gauge are reduced, and the operation reliability is improved. The fuel gas loss is reduced as much as possible; compared with a conventional debugging method, the time consumed in the reset debugging process of the stop valve is obviously shortened, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cut-off valves, in particular to a cut-off valve testing device. Background Art

[0002] The cut-off valve is a safety protection device in the gas transmission and distribution system. It has the function of monitoring the overpressure or underpressure of the gas pressure and cutting off. When the system pressure is higher than the set pressure value, the cut-off valve can quickly and urgently cut off the gas supply to protect the downstream pipelines and users. In the high-pressure gas supply system, the cut-off valve is usually installed on the pressure regulating process pipeline across two or more pressure levels. The high-pressure branch currently has about 200 cut-off valves installed, most of which are DN150 to DN200 in diameter.

[0003] The set pressure of the cut-off valve is usually 1.4-1.5 times the operating pressure. To ensure the reliability of the cut-off valve, according to the regulations of the group and the high-pressure branch, each team is required to debug and inspect the cut-off valve every year to ensure the accuracy of its cut-off value. At the same time, it is necessary to prevent accidental cut-off and cause downstream supply interruption. At present, there are at least two procedures in the process of setting the cut-off valve:

[0004] 1. Set the cut-off valve: First, close the closed outlet ball valve of the branch, then use the pressure regulator to increase the outlet pressure to the cut-off pressure value of the cut-off valve, and then adjust the cut-off valve spring until it is cut off.

[0005] 2. Check the cut-off valve: release the pressure in the pipeline between the regulator and the outlet valve, then reduce the outlet pressure of the regulator, close the relief valve and slowly increase the pressure until the cut-off valve is cut off, compare the pressure value when the cut-off valve is cut off with the value just set, and the error should be no more than 1% to be qualified. Finally, the pressure in the pipeline must be released to restore the operating pressure.

[0006] Problems:

[0007] 1. Each time the shut-off valve is debugged and calibrated, the outlet pressure of the pressure regulator must be repeatedly increased, and the pressure must be relieved and released at least twice after calibration, which will cause certain losses;

[0008] 2. The setting value of the cut-off valve is due to the error of the spring pressure gauge, so the commissioning personnel need to master certain skills, otherwise the setting error will be magnified, and the operation steps are more complicated;

[0009] Therefore, we proposed a shut-off valve testing device. Utility Model Content

[0010] The utility model aims to provide a cut-off valve testing device, which has the advantages of reducing gas loss and improving operational reliability, so as to solve the problems raised in the above-mentioned background technology.

[0011] To achieve the above object, the utility model provides a shut-off valve testing device, comprising a base and a gas pipe, wherein a vertical plate is mounted on the base, a pressure stabilizing tank is mounted on the vertical plate, the pressure stabilizing tank is connected to the vertical plate through a first fixing assembly, a pressure regulator is mounted on one side of the gas pipe, and a shut-off valve body is mounted on the other side;

[0012] The vertical plate is provided with a high-precision pressure reducing valve, which is electrically connected to an electronic pressure gauge;

[0013] The air inlet end of the high-precision pressure reducing valve is connected to the pressure output end of the pressure regulator, and the exhaust end of the high-precision pressure reducing valve is connected to the air inlet end of the pressure regulating tank;

[0014] The exhaust end of the pressure stabilizing tank is connected to an exhaust valve, the exhaust valve is connected to the vertical plate through a second fixing group, and one end of the exhaust valve is connected to the pressure feedback port of the cut-off valve body;

[0015] The first fixing assembly includes a fixing seat, one side of which is in contact with the surface of the vertical plate, and a groove adapted to the pressure stabilizing tank is formed on a side of the fixing seat away from the vertical plate;

[0016] The second fixing assembly includes a connecting block sleeved on the outside of the exhaust valve, a second hoop body is slidably inserted inside the connecting block, one end of the second hoop body slides through the vertical plate and extends to the external thread of the vertical plate to be connected with a second screw sleeve, and one side of the second screw sleeve is in contact with the back of the vertical plate.

[0017] Preferably, a first rubber pad is bonded inside the groove, and one side of the pressure-sustaining tank extends into the inside of the groove and fits with the surface of the first rubber pad.

[0018] Preferably, a first hoop body is sleeved on the outside of the pressure stabilizing tank, and a second rubber pad is installed between the first hoop body and the pressure stabilizing tank.

[0019] Preferably, the surfaces of the fixing seat and the vertical plate are both provided with through holes adapted to the first hoop body, and one end of the first hoop body away from the pressure-stabilizing tank slides through the through hole and extends to the back side of the vertical plate.

[0020] Preferably, an end of the first hoop body away from the pressure-stabilizing tank is provided with an external thread, one end of the first hoop body is threadedly connected to a first screw sleeve via the external thread, and one side of the first screw sleeve is in contact with the back side of the vertical plate.

[0021] Preferably, a first hose is connected between the air inlet end of the high-precision pressure reducing valve and the pressure output end of the pressure regulator, and a first connector is connected between the air outlet end of the high-precision pressure reducing valve and the bottom of the pressure stabilizing tank.

[0022] Preferably, a second hose is connected between one end of the exhaust valve and the pressure feedback port of the cut-off valve body, and a second connector is connected between one end of the pressure-stabilizing tank away from the first connector and the exhaust valve.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] 1. The utility model sets the cut-off valve through the device, realizes the standardized operation of the cut-off valve, improves the setting accuracy of the cut-off valve, and also checks whether the cut-off valve meets the technical indicators, while reducing the errors of manual operation and spring pressure gauges, and improving the reliability of operation.

[0025] 2. Compared with the previous debugging methods and test devices, the utility model reduces the loss of gas as much as possible; compared with the previous debugging methods, the time consumed in the shut-off valve reset debugging process is significantly reduced, thereby improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 It is a side view structural schematic diagram of the utility model;

[0028] Figure 3 It is a rear view structural schematic diagram of the fixing seat of the utility model;

[0029] Figure 4 This is a rear view structural diagram of the electronic pressure gauge of the utility model;

[0030] Figure 5 It is a rear structural schematic diagram of the connecting block of the utility model.

[0031] In the figure: 1. base; 2. gas pipe; 3. riser; 4. pressure regulator; 5. shut-off valve body; 6. high-precision pressure reducing valve; 7. electronic pressure gauge; 8. exhaust valve; 9. fixing seat; 10. second rubber pad; 11. first hoop body; 12. first rubber pad; 13. first screw sleeve; 14. first hose; 15. first connector; 16. second hose; 17. second connector; 18. connecting block; 19. second hoop body; 20. second screw sleeve; 21. pressure-stabilizing tank. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] See also Figure 1-5 The utility model provides a cut-off valve test device, including a base 1 and a gas pipe 2. A vertical plate 3 is installed on one side of the top of the base 1. A pressure stabilizing tank 21 is arranged on the front of the vertical plate 3. A first fixing component for fixing the pressure stabilizing tank 21 is installed on the outside of the pressure stabilizing tank 21. One end of the first fixing component is connected to the surface of the vertical plate 3. The first fixing component includes a fixing seat 9. One side of the fixing seat 9 is in contact with the surface of the vertical plate 3. A groove matching the pressure stabilizing tank 21 is provided on the side of the fixing seat 9 away from the vertical plate 3. By setting the groove, the pressure stabilizing tank 21 is embedded in the inside of the groove, which can better limit the pressure stabilizing tank 21.

[0034] Specifically, the surge tank 21 maintains the pressure of the system.

[0035] The first rubber pad 12 is bonded to the inside of the above-mentioned groove, and one side of the pressure-suppressing tank 21 extends to the inside of the groove and fits with the surface of the first rubber pad 12. The outside of the pressure-suppressing tank 21 is sleeved with a first hoop body 11, and a second rubber pad 10 is installed between the first hoop body 11 and the pressure-suppressing tank 21. By providing the first rubber pad 12 and the second rubber pad 10, the friction between the fixing seat 9 and the first hoop body 11 and the pressure-suppressing tank 21 can be increased, and the fixing effect of the pressure-suppressing tank 21 can be improved. The first rubber pad 12 and the second rubber pad 10 can prevent the pressure-suppressing tank 21 from being excessively squeezed when the pressure-suppressing tank 21 is tightened through their own elasticity and toughness.

[0036] The surfaces of the fixing seat 9 and the vertical plate 3 are both provided with through holes adapted to the first hoop body 11, and one end of the first hoop body 11 away from the pressure stabilizing tank 21 slides through the through hole and extends to the back of the vertical plate 3. An external thread is provided at one end of the first hoop body 11 away from the pressure stabilizing tank 21, and one end of the first hoop body 11 is threadedly connected to a first screw sleeve 13 through the external thread, and one side of the first screw sleeve 13 is in contact with the back of the vertical plate 3. By rotating the first screw sleeve 13, the first screw sleeve 13 can tighten the first hoop body 11, so that the pressure stabilizing tank 21 can be stably fixed on the surface of the vertical plate 3.

[0037] A pressure regulator 4 is installed on one side of the top of the gas pipe 2, and a shut-off valve body 5 is installed on the side of the gas pipe 2 away from the pressure regulator 4; a high-precision pressure reducing valve 6 is installed on the front of the vertical plate 3 and on one side of the pressure stabilizing tank 21, and an electronic pressure gauge 7 is electrically connected to the high-precision pressure reducing valve 6; the air inlet end of the high-precision pressure reducing valve 6 is connected to the pressure output end of the pressure regulator 4, and the exhaust end of the high-precision pressure reducing valve 6 is connected to the air inlet end of the pressure stabilizing tank 21; the exhaust end of the pressure stabilizing tank 21 is connected to the exhaust valve 8, and the end of the exhaust valve 8 away from the pressure stabilizing tank 21 is connected to the pressure feedback port of the shut-off valve body 5. The electronic pressure gauge 7 is used to monitor the pressure in the high-precision pressure reducing valve 6 and provide data.

[0038] It is worth noting that a first hose 14 is connected between the air inlet of the high-precision pressure reducing valve 6 and the pressure output of the pressure regulator 4 , and a first connector 15 is connected between the air outlet of the high-precision pressure reducing valve 6 and the bottom of the pressure stabilizing tank 21 .

[0039] A second hose 16 is connected between one end of the exhaust valve 8 and the pressure feedback port of the cut-off valve body 5, and a second connector 17 is connected between one end of the pressure stabilizing tank 21 away from the first connector 15 and the exhaust valve 8. The second connector 17 is used to connect the pressure stabilizing tank 21 and the exhaust valve 8.

[0040] The high-precision pressure reducing valve 6 is a valve that reduces the inlet pressure to a certain required outlet pressure by adjusting, and automatically maintains the outlet pressure stable by relying on the energy of the medium itself. The high-precision pressure reducing valve 6 is a throttling element with variable local resistance, that is, by changing the throttling area, the flow rate and the kinetic energy of the fluid are changed, resulting in different pressure losses, thereby achieving the purpose of pressure reduction, and then relying on the adjustment of the control and regulation system, the fluctuation of the pressure after the valve is balanced with the spring force, so that the pressure after the valve is kept constant within a certain error range.

[0041] The inlet pressure before the pressure regulator 4 is used as the pressure source, and the pressure is reduced to the cut-off set pressure value through the high-precision pressure reducing valve 6. After the pressure feedback port of the cut-off valve body 5 is connected with the second hose 16, the cut-off valve body 5 is set to be cut off. Then, the high-precision pressure reducing valve 6 is used to release the pressure, and the cut-off valve body 5 is checked.

[0042] The utility model has the advantages of simple structure and easy operation. By setting the cut-off valve body 5 through the device, firstly, the standardized operation of the cut-off valve body 5 is realized, and the setting accuracy of the cut-off valve body 5 is improved. At the same time, whether the cut-off valve body 5 meets the relevant technical indicators is also checked, and the error of manual operation and the spring pressure gauge is reduced, thereby improving the reliability of operation;

[0043] Second, compared with previous debugging methods, the loss of gas is reduced as much as possible to meet the manufacturer's requirements for reducing the gap between supply and sales and saving consumption and reducing emissions;

[0044] Third, compared with the previous debugging methods, the time consumed in the reset debugging process of the cut-off valve body 5 is significantly reduced, thereby improving the inspection efficiency of the cut-off valve.

[0045] Specifically, a second fixing component for fixing the exhaust valve 8 is installed on the surface of the exhaust valve 8, and one end of the second fixing component is connected to the surface of the vertical plate 3; the second fixing component includes a connecting block 18 sleeved on the outside of the exhaust valve 8, and a second hoop body 19 is slidably inserted inside the connecting block 18, and one end of the second hoop body 19 slides through the vertical plate 3 and extends to the external thread of the vertical plate 3 and is connected to a second screw sleeve 20, one side of the second screw sleeve 20 is in contact with the back side of the vertical plate 3, and by rotating the second screw sleeve 20, the second screw sleeve 20 rotates while the exhaust valve 8 can be tightened and the exhaust valve 8 can be stably fixed on the vertical plate 3, thereby improving the stability of the test device.

[0046] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shut-off valve testing device, comprising a base (1) and a gas pipe (2), characterized in that: The base (1) is provided with a vertical plate (3), the vertical plate (3) is provided with a pressure stabilizing tank (21), the pressure stabilizing tank (21) is connected to the vertical plate (3) via a first fixing assembly, a pressure regulator (4) is provided on one side of the gas pipe (2), and a shut-off valve body (5) is provided on the other side; The vertical plate (3) is provided with a high-precision pressure reducing valve (6), and the high-precision pressure reducing valve (6) is electrically connected to an electronic pressure gauge (7); The air inlet end of the high-precision pressure reducing valve (6) is connected to the pressure output end of the pressure regulator (4), and the exhaust end of the high-precision pressure reducing valve (6) is connected to the air inlet end of the pressure regulating tank (21); The exhaust end of the pressure stabilizing tank (21) is connected to an exhaust valve (8), the exhaust valve (8) is connected to the vertical plate (3) through a second fixing component, and one end of the exhaust valve (8) is connected to a pressure feedback port of the cut-off valve body (5); The first fixing assembly comprises a fixing seat (9), one side of the fixing seat (9) is in contact with the surface of the vertical plate (3), and a groove adapted to the pressure-suppressing tank (21) is provided on a side of the fixing seat (9) away from the vertical plate (3); The second fixing assembly comprises a connecting block (18) sleeved on the outside of the exhaust valve (8), a second hoop body (19) is slidably inserted into the interior of the connecting block (18), one end of the second hoop body (19) slides through the vertical plate (3) and extends to the outside of the vertical plate (3) and is threadedly connected to a second screw sleeve (20), one side of the second screw sleeve (20) is in contact with the back side of the vertical plate (3).

2. The shut-off valve testing device according to claim 1, characterized in that: A first rubber pad (12) is bonded to the interior of the groove, and one side of the pressure-sustaining tank (21) extends to the interior of the groove and fits with the surface of the first rubber pad (12).

3. The shut-off valve testing device according to claim 1, characterized in that: The outer portion of the pressure stabilizing tank (21) is sleeved with a first hoop body (11), and a second rubber pad (10) is installed between the first hoop body (11) and the pressure stabilizing tank (21).

4. The shut-off valve testing device according to claim 3, characterized in that: The surfaces of the fixing seat (9) and the vertical plate (3) are both provided with through holes adapted to the first hoop body (11); one end of the first hoop body (11) away from the pressure-stabilizing tank (21) slides through the through hole and extends to the back side of the vertical plate (3).

5. The shut-off valve testing device according to claim 3, characterized in that: An end of the first hoop body (11) away from the pressure-stabilizing tank (21) is provided with an external thread, and one end of the first hoop body (11) is threadedly connected to a first screw sleeve (13) via the external thread, and one side of the first screw sleeve (13) is in contact with the back side of the vertical plate (3).

6. The shut-off valve testing device according to claim 1, characterized in that: A first hose (14) is connected between the air inlet end of the high-precision pressure reducing valve (6) and the pressure output end of the pressure regulator (4), and a first connector (15) is connected between the air outlet end of the high-precision pressure reducing valve (6) and the bottom of the pressure stabilizing tank (21).

7. The shut-off valve testing device according to claim 1, characterized in that: A second hose (16) is connected between one end of the exhaust valve (8) and the pressure feedback port of the cut-off valve body (5), and a second connector (17) is connected between one end of the pressure-stabilizing tank (21) away from the first connector (15) and the exhaust valve (8).

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