CN219121702U

CN219121702U - Bypass valve test bed

Info

Publication number: CN219121702U
Application number: CN202222554212.7U
Authority: CN
Inventors: 刘新宇; 胡军; 彭涛; 邵翔宇
Original assignee: Shanghai Essen Hydraulic System Co ltd
Current assignee: Shanghai Essen Hydraulic System Co ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2023-06-02
Anticipated expiration: 2032-09-26

Abstract

The application relates to a bypass valve test bench, it includes the oil tank, the oil pump, the honeycomb duct, overflow subassembly, the choke subassembly, first manometer, flowmeter and first back flow, the oil inlet of oil pump communicates in the oil tank, the oil pump, the honeycomb duct, flowmeter and first back flow connect gradually, first back flow communicates in the oil tank, overflow subassembly includes first branch pipe and overflow valve, the one end of first branch pipe communicates in the honeycomb duct, the other end of first branch pipe communicates in the overflow valve, the choke subassembly includes second branch pipe and choke valve, the one end of second branch pipe communicates in the honeycomb duct of first branch pipe in oil pump one side of keeping away from, the other end of second branch pipe communicates in the choke valve, the honeycomb duct of oil pump one side is kept away from in the second branch pipe is connected to first manometer, the honeycomb duct between first manometer and the second branch pipe is used for supplying the bypass valve to connect. The throttle valve controls the oil pressure of the flow guide pipe to increase from 0, and when the flowmeter displays the reading, the reading of the first pressure gauge is read, so that the opening point pressure value of the bypass valve is accurately detected.

Description

Bypass valve test bed

Technical Field

The application relates to the field of bypass valve detection, in particular to a bypass valve test bed.

Background

The bypass valve is also called a self-operated bypass differential pressure valve and a self-operated self-differential pressure control valve. The bypass valve is a valve which is arranged on a bypass pipe of the inlet valve pipe section and used for filling water to balance the front and rear water pressure of the inlet valve, such as a pressure reducing valve, a control valve and a steam trap valve, and the valve arranged on the bypass pipe is called a bypass valve.

The traditional bypass valve opening point pressure test is carried out one by a worker through a pressure test instrument, and because the worker does not have a matched bypass valve opening point pressure test instrument, the worker can only roughly estimate the obtained data to judge whether the bypass valve is qualified or not, so that the quality of the bypass valve is not uniform, and occasionally unqualified products are mixed into the bypass valve to influence the subsequent production.

Disclosure of Invention

For accurate detection of the opening point pressure of the bypass valve, the application provides a bypass valve test stand.

The application provides a bypass valve test bench adopts following technical scheme:

the utility model provides a bypass valve laboratory bench, includes oil tank, oil pump, honeycomb duct, overflow subassembly, choke subassembly, first manometer, flowmeter and first back flow, the oil inlet of oil pump communicates in the oil tank, the oil-out of oil pump communicates in the one end of honeycomb duct, the other end of honeycomb duct communicates in the one end of flowmeter, the other end of flowmeter communicates in the one end of first back flow, the other end of first back flow communicates in the oil tank, overflow subassembly includes first branch pipe and overflow valve, the one end of first branch pipe communicates in the honeycomb duct, the other end of first branch pipe communicates in the overflow valve, the choke subassembly includes second branch pipe and choke valve, the one end of second branch pipe communicates in the honeycomb duct of first branch pipe in one side of keeping away from the oil pump, the other end of second branch pipe communicates in the choke valve, the honeycomb duct of first manometer is connected in one side of second branch pipe is kept away from the oil pump, the honeycomb duct between first manometer and the second branch pipe is used for supplying the bypass valve to connect.

Through adopting above-mentioned technical scheme, the oil pump is taken out the oil in the oil tank and is carried, and the overflow valve is used for controlling the oil pressure of honeycomb duct and does not surpass the setting value, and the choke valve is used for controlling the oil pressure of honeycomb duct and begins to increase from 0, and when the oil pressure reached bypass valve opening point pressure, the flowmeter shows the reading, and the reading that the reading first manometer shows at this moment is the opening point pressure value of bypass valve, easy and simple to handle, and can accurately detect the opening point pressure value of bypass valve.

Preferably, the overflow assembly further comprises a second return pipe, one end of the second return pipe is communicated with the overflow valve, and the other end of the second return pipe is communicated with the oil tank.

Through adopting above-mentioned technical scheme, when the oil pressure of honeycomb duct is too high, the valve of overflow valve opens, and the fluid passes through the circulation use in the second back flow conveying return tank, reduces the waste of fluid.

Preferably, the hydraulic oil pump further comprises a second pressure gauge, and the second pressure gauge is connected to the flow guide pipe on one side of the first branch pipe, which is close to the oil pump.

Through adopting above-mentioned technical scheme, the oil pressure in the pipeline before the second manometer detectable overflow valve can be according to the cognitive judgement to follow-up experimental process in advance that has now, if the oil pressure is too high, and the oil can't reach the bypass valve, the power of adjustable oil pump reduces the oil pressure of honeycomb duct.

Preferably, the throttle valve is a proportional valve.

By adopting the technical scheme, the proportional valve can control the oil pressure proportionally, and is simple and convenient to operate.

Preferably, a drip pan is also included for receiving oil disposed below the bypass valve.

Through adopting above-mentioned technical scheme, connect the food tray to collect the fluid that the bypass valve effused, reduce the fluid extravagant.

Preferably, the oil receiving disc further comprises a third return pipe, the oil receiving disc is provided with an oil receiving groove, the bottom of the oil receiving groove is communicated with one end of the third return pipe, and the other end of the third return pipe is communicated with the oil tank.

Through adopting above-mentioned technical scheme, collect fluid and directly carry the oil return tank through the third back flow, be convenient for retrieve, easy and simple to handle.

Preferably, the flow guide pipe further comprises a switching valve, the flow guide pipe comprises a flow conveying pipe and a pressure measuring pipe, one end of the flow conveying pipe is communicated with an oil outlet of the oil pump, the other end of the flow conveying pipe is connected with one end of the switching valve, the other end of the switching valve is connected with one end of the pressure measuring pipe, the other end of the pressure measuring pipe is communicated with a flow meter, the first branch pipe and the second branch pipe are both communicated with the flow conveying pipe, the first pressure gauge is connected with the pressure measuring pipe, and the pressure measuring pipe between the first pressure gauge and the switching valve is used for being connected with a bypass valve.

Through adopting above-mentioned technical scheme, when the test of need changing the bypass valve, can close the ooff valve for when changing the bypass valve, the fluid waste is difficult for appearing.

Preferably, the upper end of the oil tank is connected with an air filter.

Through adopting above-mentioned technical scheme, when the oil pump draws the oil in the oil tank, the pressure in the oil tank reduces, and accessible air cleaner supplements outside air to in the oil tank for the inside and outside pressure balance of oil tank, the oil tank is difficult for impaired, and air cleaner can filter outside air's impurity, reduces the probability that fluid received the pollution.

Preferably, the oil tank is connected with a liquid level relay, and the liquid level relay is used for detecting the liquid level in the oil tank.

Through adopting above-mentioned technical scheme, liquid level in the liquid level relay detection oil tank is high, and the fluid content in the oil tank is too little, can in time supplement.

Preferably, the oil tank is connected with a liquid level thermometer, and the liquid level thermometer is used for detecting the liquid level temperature and the liquid level height in the oil tank.

Through adopting above-mentioned technical scheme, if liquid level temperature is too high easily causes the incident, if liquid level temperature is too low, fluid viscosity improves, influences the detection to the bypass valve, detects the liquid level temperature in the oil tank and can in time avoid the risk, improves experimental efficiency.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the oil pump pumps and conveys the oil in the oil tank, the overflow valve is used for controlling the oil pressure of the flow guide pipe not to exceed a set value, the throttle valve is used for controlling the oil pressure of the flow guide pipe to increase from 0, when the oil pressure reaches the opening point pressure of the bypass valve, the flowmeter displays a reading, at the moment, the reading displayed by the first pressure gauge is the opening point pressure value of the bypass valve, the operation is simple and convenient, and the opening point pressure value of the bypass valve can be accurately detected;

2. the second pressure gauge can detect the oil pressure in the pipeline before the overflow valve, can predict the subsequent experimental process according to the existing cognition, if the oil pressure is too high, the oil cannot reach the bypass valve, and the power of the oil pump can be adjusted to reduce the oil pressure of the guide pipe;

3. when the oil pump pumps the oil in the oil tank, the pressure in the oil tank is reduced, and the outside air can be supplemented into the oil tank through the air filter, so that the pressure inside and outside the oil tank is balanced, the oil tank is not easy to damage, the air filter can filter the impurities of the outside air, and the probability that the oil liquid is polluted is reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of a bypass valve test bed.

Fig. 2 is an enlarged view at a in fig. 1.

Reference numerals illustrate: 1. an oil tank; 11. an air filter; 12. a liquid level relay; 13. a liquid level thermometer; 2. an oil pump; 31. a first filter; 32. a second filter; 4. a flow guiding pipe; 41. a flow delivery tube; 42. a pressure measuring tube; 51. a second pressure gauge; 52. a first pressure gauge; 6. an overflow assembly; 61. a first branch pipe; 62. an overflow valve, 63, a second return pipe; 64. a two-position four-way electromagnetic valve; 641. a P connection port; 642. a T connection port; 643. a, connecting ports; 644. a B connection port; 65. a third branch pipe; 66. a fourth branch pipe; 67. a fifth branch pipe; 68. a sixth branch pipe; 7. a throttle assembly; 71. a second branch pipe; 72. a throttle valve; 73. a fourth return line; 81. a total return pipe; 82. a first return pipe; 83. a third return line; 91. a switch valve; 92. a flow meter; 10. an oil pan; 101. and an oil receiving groove.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-2.

Referring to fig. 1, the embodiment of the application discloses a bypass valve test stand, which comprises an oil tank 1, an oil pump 2, a first filter 31, a flow guiding pipe 4, a second pressure gauge 51, an overflow assembly 6, a throttling assembly 7, a total return pipe 81, an on-off valve 91, a first pressure gauge 52, a flowmeter 92 and a first return pipe 82. The draft tube 4 includes a draft tube 41 and a pressure measuring tube 42.

The oil inlet of the oil pump 2 is communicated with the oil tank 1, the oil outlet of the oil pump 2 is communicated with one end of the first filter 31, the other end of the first filter 31 is communicated with one end of the flow conveying pipe 41, and the first filter 31 is used for filtering impurities in oil. The other end of the flow pipe 41 is connected to one end of the switch valve 91, the other end of the switch valve 91 is connected to one end of the pressure measuring pipe 42, the other end of the pressure measuring pipe 42 is connected to one end of the flow meter 92, the other end of the flow meter 92 is connected to one end of the first return pipe 82, and the other end of the first return pipe 82 is connected to the tank 1. The on-off valve 91 is a ball valve.

The first pressure gauge 52 is connected to the pressure measuring pipe 42, and the pressure measuring pipe 42 between the first pressure gauge 52 and the on-off valve 91 is used for bypass valve connection.

The overflow assembly 6 comprises a first branch pipe 61, an overflow valve 62 and a second return pipe 63. One end of the first branch pipe 61 is connected to the flow-transmitting pipe 41, the other end of the first branch pipe 61 is connected to one end of the relief valve 62, the other end of the relief valve 62 is connected to one end of the second return pipe 63, the other end of the second return pipe 63 is connected to one end of the total return pipe 81, and the other end of the total return pipe 81 is connected to the tank 1. The second pressure gauge 51 is connected to the flow pipe 41 on the side of the first branch pipe 61 near the first filter 31.

Referring to fig. 1 and 2, the overflow assembly 6 further includes a two-position four-way solenoid valve 64, a third branch pipe 65, a fourth branch pipe 66, a fifth branch pipe 67, and a sixth branch pipe 68, and the two-position four-way solenoid valve 64 is provided with a P connection port 641, a T connection port 642, an a connection port 643, and a B connection port 644. The P connection port 641 and the T connection port 642 are positioned on the same side of the two-position four-way solenoid valve 64, and the a connection port 643 and the B connection port 644 are positioned on the other side of the two-position four-way solenoid valve 64. One end of the third branch pipe 65 is connected to the first branch pipe 61, and the other end of the third branch pipe 65 is connected to the P connection port 641. One end of the fourth branch pipe 66 is connected to the a connection port 643, and the other end of the fourth branch pipe 66 is communicated with the second return pipe 63. One end of the fifth branch pipe 67 is connected to the second return pipe 63, and the other end of the fifth branch pipe 67 is connected to the T connection port 642. One end of the sixth branch pipe 68 is connected to the B connection port 644, and the other end of the sixth branch pipe 68 is connected to the draft tube 4.

When the hydraulic pressure in the pilot pipe 4 is excessively high, the relief valve 62 is opened, and when the two-position four-way solenoid valve 64 is set to the first state, the P connection port 641 communicates with the a connection port 643, and the t connection port 642 communicates with the B connection port 644. When the hydraulic pressure in the pilot pipe 4 is normal, the relief valve 62 is closed, the two-position four-way solenoid valve 64 is set to the second state, the P connection port 641 communicates with the B connection port 644, and the t connection port 642 communicates with the a connection port 643.

The throttle assembly 7 comprises a second branch 71, a throttle valve 72 and a fourth return conduit 73. One end of the second branch pipe 71 is communicated with the flow transmission pipe 41 on the side of the sixth branch pipe 68 away from the oil pump 2, the other end of the second branch pipe 71 is connected with one end of the throttle valve 72, the other end of the throttle valve 72 is connected with one end of the fourth return pipe 73, and the other end of the fourth return pipe 73 is communicated with one end of the total return pipe 81 away from the oil tank 1. The throttle valve 72 is a proportional valve.

The second filter 32 is connected to the total return pipe 81.

The bypass valve test stand further comprises an oil receiving disc 10 and a third return pipe 83, wherein the oil receiving disc 10 is used for being placed below the bypass valve to receive oil, the oil receiving disc 10 is provided with an oil receiving groove 101, the bottom of the oil receiving groove 101 is communicated with one end of the third return pipe 83, and the other end of the third return pipe 83 is communicated with the oil tank 1.

An air filter 11 is connected to the upper end of the oil tank 1, and the air filter 11 is an air cleaner. The oil tank 1 is connected with a liquid level relay 12, and the liquid level relay 12 is used for detecting the liquid level in the oil tank 1. The oil tank 1 is connected with a liquid level thermometer 13, and the liquid level thermometer 13 is used for detecting the liquid level temperature and the liquid level height in the oil tank 1.

The implementation principle of the bypass valve test bed provided by the embodiment of the application is as follows: when it is necessary to accurately detect the opening point pressure value of the bypass valve, the on-off valve 91 is closed, the two-position four-way solenoid valve 64 is set to the first state, the bypass valve to be detected is mounted on the pressure measuring pipe 42, the on-off valve 91 is opened, and the two-position four-way solenoid valve 64 is set to the second state. The oil pump 2 pumps the liquid in the oil tank 1, the liquid enters the flow transmission pipe 41 after being filtered by the first filter 31, the second pressure gauge 51 detects the oil pressure in the flow transmission pipe 41, when the oil pressure in the flow transmission pipe 41 is overlarge, the overflow valve 62 is opened, the oil returns to the oil tank 1 from the second return pipe 63 through the longitudinal return pipe, when the oil pressure in the flow transmission pipe 41 is normal, the overflow valve 62 is closed, the oil is conveyed to the throttle valve 72, the throttle valve 72 adjusts the oil pressure to increase from 0, when the oil pressure reaches the opening point pressure value of the bypass valve, the flowmeter 92 displays the reading, and the detection reading of the first pressure gauge 52 at the moment is the opening point pressure value of the bypass valve.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The utility model provides a bypass valve test bench which characterized in that: comprises an oil tank (1), an oil pump (2), a flow guiding pipe (4), an overflow assembly (6), a throttling assembly (7), a first pressure gauge (52), a flowmeter (92) and a first backflow pipe (82), wherein an oil inlet of the oil pump (2) is communicated with the oil tank (1), an oil outlet of the oil pump (2) is communicated with one end of the flow guiding pipe (4), the other end of the flow guiding pipe (4) is communicated with one end of the flowmeter (92), the other end of the flowmeter (92) is communicated with one end of the first backflow pipe (82), the other end of the first backflow pipe (82) is communicated with the oil tank (1), the overflow assembly (6) comprises a first branch pipe (61) and an overflow valve (62), one end of the first branch pipe (61) is communicated with the overflow valve (62), the throttling assembly (7) comprises a second branch pipe (71) and a throttling valve (72), one end of the second branch pipe (71) is communicated with the flow guiding pipe (4) on one side of the first branch pipe (61) away from the oil pump (2), the first pressure gauge (52) is connected to the flow guide pipe (4) on one side, far away from the oil pump (2), of the second branch pipe (71), and the flow guide pipe (4) between the first pressure gauge (52) and the second branch pipe (71) is used for being connected with a bypass valve.

2. A bypass valve test bed as claimed in claim 1 wherein: the overflow assembly (6) further comprises a second return pipe (63), one end of the second return pipe (63) is communicated with the overflow valve (62), and the other end of the second return pipe (63) is communicated with the oil tank (1).

3. A bypass valve test bed as claimed in claim 1 wherein: the hydraulic oil pump further comprises a second pressure gauge (51), and the second pressure gauge (51) is connected to the flow guide pipe (4) on one side of the first branch pipe (61) close to the oil pump (2).

4. A bypass valve test bed as claimed in claim 1 wherein: the throttle valve (72) is a proportional valve.

5. A bypass valve test bed as claimed in claim 1 wherein: the oil receiving disc (10) is used for being placed below the bypass valve to receive oil.

6. A bypass valve test bed as recited in claim 5, wherein: the oil receiving disc (10) is provided with an oil receiving groove (101), the groove bottom of the oil receiving groove (101) is communicated with one end of the third return tube (83), and the other end of the third return tube (83) is communicated with the oil tank (1).

7. A bypass valve test bed as claimed in claim 1 wherein: still include ooff valve (91), honeycomb duct (4) include defeated flow tube (41) and piezometer tube (42), the one end of defeated flow tube (41) communicates in the oil-out of oil pump (2), the other end of defeated flow tube (41) is connected in the one end of ooff valve (91), the other end of ooff valve (91) is connected in the one end of piezometer tube (42), the other end of piezometer tube (42) communicates in flowmeter (92), first branch pipe (61) and second branch pipe (71) all communicate in defeated flow tube (41), first manometer (52) are connected in piezometer tube (42), piezometer tube (42) between first manometer (52) and the ooff valve (91) are used for supplying the bypass valve to connect.

8. A bypass valve test bed as claimed in claim 1 wherein: the upper end of the oil tank (1) is connected with an air filter (11).

9. A bypass valve test bed as claimed in claim 1 wherein: the oil tank (1) is connected with a liquid level relay (12), and the liquid level relay (12) is used for detecting the liquid level in the oil tank (1).

10. A bypass valve test bed as claimed in claim 1 wherein: the oil tank (1) is connected with a liquid level thermometer (13), and the liquid level thermometer (13) is used for detecting the liquid level temperature and the liquid level height in the oil tank (1).