CN219657148U - Auxiliary tool for performance test of proportional valve - Google Patents

Abstract

The utility model relates to an auxiliary tool for testing performance of a proportional valve. The proportional valve has a plurality of interfaces, auxiliary fixtures includes: the tool comprises a tool main body, wherein the tool main body is provided with a first interface group and a second interface group, the first interface group comprises a plurality of first interfaces, and the plurality of first interfaces are used for being correspondingly connected with a plurality of interfaces of the proportional valve; the second interface group comprises a plurality of second interfaces, and the second interfaces are used for being connected with corresponding interfaces of the oil supply device; the tool comprises a tool body and is characterized in that a plurality of oil liquid channels are arranged in the tool body, and each oil liquid channel is communicated with one first interface and one corresponding second interface; the pressure sensor group comprises a plurality of pressure sensors which are arranged on the tool main body, and the pressure sensors are connected into the oil liquid channel; the flowmeter group is installed in the tool main body, and the flowmeter group is connected into the oil liquid channel.

Description

Auxiliary tool for performance test of proportional valve

Technical Field

The utility model relates to the technical field of hydraulic pressure, in particular to an auxiliary tool for testing performance of a proportional valve.

Background

The proportional valve is a control valve for continuously and proportionally controlling the flow, pressure and direction of a hydraulic system according to the input electric signals, and the output flow and pressure of the proportional valve can not be influenced by load change, and has the advantages of strong pollution resistance, reliable operation and the like.

At present, performance testing of the comparative example valve is only carried out in the design and research units of the proportional valve, and a user who purchases and uses the proportional valve lacks special equipment capable of testing the performance of the comparative example valve, and the user needs to manually connect a pressure gauge, a flowmeter and the like when the comparative example valve performs fault detection and diagnosis, so that the efficiency of the testing process is lower, and the accuracy of the obtained data is lower.

Disclosure of Invention

Based on the above, it is necessary to provide an auxiliary tool for testing the performance of the proportional valve, which is convenient for a user to test the performance of the proportional valve, and improves the testing efficiency and the accuracy of the obtained data.

The embodiment of the utility model provides an auxiliary tool for testing performance of a proportional valve, the proportional valve is provided with a plurality of interfaces, and the auxiliary tool comprises: the tool comprises a tool main body, wherein the tool main body is provided with a first interface group and a second interface group, the first interface group comprises a plurality of first interfaces, and the plurality of first interfaces are used for being correspondingly connected with a plurality of interfaces of the proportional valve; the second interface group comprises a plurality of second interfaces, and the second interfaces are used for being connected with corresponding interfaces of the oil supply device; the tool comprises a tool body and is characterized in that a plurality of oil liquid channels are arranged in the tool body, and each oil liquid channel is communicated with one first interface and one corresponding second interface; the pressure sensor group comprises a plurality of pressure sensors which are arranged on the tool main body, and the pressure sensors are connected into the oil liquid channel; the flowmeter group is installed in the tool main body, and the flowmeter group is connected into the oil liquid channel.

The auxiliary tool for testing the performance of the proportional valve can be used for testing the performance of the proportional valve. When testing, a plurality of first interfaces on the tool main body are connected with a plurality of interfaces on the proportional valve in a one-to-one correspondence manner, and a plurality of second interfaces on the tool main body are connected with corresponding interfaces of an external oil supply device, namely, the proportional valve is connected with the oil supply device through an auxiliary tool. In addition, the proportional valve is connected with an external control device during testing, the pressure sensor group and the flowmeter group are connected with an external data acquisition device, the control device is used for controlling the state of the proportional valve, and the data acquisition device is used for acquiring pressure data and flow data and calculating the performance of the proportional valve according to the acquired data. According to the auxiliary tool provided by the embodiment of the utility model, the pressure sensor group and the flowmeter group are integrated with the tool main body, so that the process of manually installing the pressure sensor group and the flowmeter group before each test is omitted, and the improvement of the test efficiency is facilitated. In addition, the positions of the pressure sensor group and the flowmeter group on the tool main body are fixed all the time, so that the problems of installation difference, virtual connection and the like caused by repeated installation can be avoided, the consistency and the stability of the test process can be kept, and the accuracy of data is improved.

In some embodiments of the present utility model, the auxiliary tool further includes a proportional valve mounting plate, where the proportional valve mounting plate is provided with a plurality of mounting ports, the plurality of mounting ports are in one-to-one correspondence with the plurality of first interfaces, the proportional valve mounting plate is fixedly connected with the proportional valve, and the mounting ports are used for plugging the interfaces of the proportional valve; the proportional valve mounting plate is detachably connected with the tool main body.

In some embodiments of the utility model, the proportional valve has a P-port, a T-port, an a-port, and a B-port; the plurality of first interfaces comprise a first P interface, a first T interface, a first A interface and a first B interface, the plurality of second interfaces comprise a second P interface, a second T interface, a second A interface and a second B interface, the plurality of oil channels comprise a first channel, a second channel, a third channel and a fourth channel, the second P interface is communicated with the first P interface through the first channel, the second T interface is communicated with the second T interface through the second channel, the second A interface is communicated with the first A interface through the third channel, and the second B interface is communicated with the first B interface through the fourth channel; the first P interface, the first T interface, the first A interface and the first B interface are used for being correspondingly connected with the P interface, the T interface, the A interface and the B interface.

In some embodiments of the utility model, the pressure sensor set includes a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor, and a fifth pressure sensor; the first pressure sensor is configured to measure the pressure at the second P-interface, the second pressure sensor is configured to measure the pressure at the first P-interface, the third pressure sensor is configured to measure the pressure at the first T-interface, the fourth pressure sensor is configured to measure the pressure at the first a-interface, and the fifth pressure sensor is configured to measure the pressure at the first B-interface.

In some embodiments of the present utility model, the first channel includes a first sub-channel and a second sub-channel, the first sub-channel communicates the second P-interface with the first P-interface, and the second sub-channel communicates the second P-interface with the first P-interface; the flowmeter set comprises a wide-range flowmeter and a narrow-range flowmeter, the wide-range flowmeter is arranged in the first sub-channel, and the narrow-range flowmeter is arranged in the second sub-channel; the auxiliary tool further comprises a first control valve and a second control valve, wherein the first control valve is arranged in the first sub-channel, and the second control valve is arranged in the second sub-channel.

In some embodiments of the utility model, the first channel further comprises a first connecting channel, a first end of the first connecting channel is in communication with the first sub-channel, a second end of the first connecting channel is in communication with the second sub-channel, the wide range flow meter and the first control valve are located between the first end and the first P-interface, and the narrow range flow meter and the second control valve are located between the second end and the first P-interface; the auxiliary tool further comprises a third control valve, a pressure reducing valve and a sequence valve, wherein the third control valve is arranged in the first sub-channel and located between the first end and the second P interface, and the pressure reducing valve and the sequence valve are located between the second end and the second P interface.

In some embodiments of the utility model, the sequence valve is located between the second end and the pressure relief valve.

In some embodiments of the present utility model, the auxiliary tool further includes a second connection channel and a fourth control valve, where the second connection communicates the third channel with the fourth channel, and the fourth control valve is disposed in the second connection channel.

In some embodiments of the present utility model, the auxiliary tool further includes a first stop valve and a second stop valve, where the first stop valve is disposed in the third channel and near the first a interface, and the second stop valve is disposed in the fourth channel and near the first B interface.

In some embodiments of the utility model, the auxiliary tool further comprises a handle and/or a lifting ring mounted on the tool body.

Drawings

FIG. 1 is a schematic structural diagram of an auxiliary tool for testing performance of a proportional valve according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of an auxiliary tool for testing performance of a proportional valve according to an embodiment of the present utility model, wherein the auxiliary tool omits a proportional valve mounting plate;

FIG. 3 is a schematic diagram of the arrangement of oil passages of an auxiliary tool for testing the performance of a proportional valve in an embodiment of the utility model.

Reference numerals:

10. an auxiliary tool;

100. a tool main body; 110. a first interface group; 111. a first P interface; 112. a first T-interface; 113. a first A interface; 114. a first B interface; 120. a second interface group; 121. a second P interface; 122. a second T-interface; 123. a second A interface; 124. a second B interface;

200. a pressure sensor group; 210. a first pressure sensor; 220. a second pressure sensor; 230. a third pressure sensor; 240. a fourth pressure sensor; 250. a fifth pressure sensor;

300. a flowmeter set; 310. a wide range flowmeter; 320. a narrow range flow meter;

400. a proportional valve mounting plate; 410. a mounting port;

510. a first channel; 511. a first sub-channel; 512. a second sub-channel; 520. a second channel; 530. a third channel; 540. a fourth channel; 550. a first connection channel; 560. a second connection channel;

610. a first control valve; 620. a second control valve; 630. a third control valve; 640. a fourth control valve; 650. a pressure reducing valve; 660. a sequence valve; 670. a first stop valve; 680. a second shut-off valve;

710. a handle; 720. and (5) hanging rings.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

As shown in fig. 1 to 3, an auxiliary tool 10 for testing performance of a proportional valve is provided in an embodiment of the present utility model, wherein the proportional valve has a plurality of interfaces. The auxiliary tool 10 includes a tool body 100, a pressure sensor group 200, and a flowmeter group 300. Specifically, the tool main body 100 is provided with a first interface group 110 and a second interface group 120, where the first interface group 110 includes a plurality of first interfaces, and the plurality of first interfaces are used for correspondingly connecting with a plurality of interfaces of the proportional valve. The second interface group 120 includes a plurality of second interfaces for connecting with corresponding interfaces of the oil supply device. The tool main body 100 is provided with a plurality of oil channels inside, and each oil channel is communicated with a first interface and a corresponding second interface. The pressure sensor group 200 comprises a plurality of pressure sensors installed on the tool main body 100, and the pressure sensors are connected into the oil liquid channel. The flowmeter set 300 is installed on the tool main body 100, and the flowmeter set 300 is connected to the oil channel.

The auxiliary tool 10 for testing the performance of the proportional valve in the embodiment of the utility model can be used for testing the performance of the proportional valve. When testing, the first interfaces on the tool main body 100 are connected with the interfaces on the proportional valve in a one-to-one correspondence manner, and the second interfaces on the tool main body 100 are connected with the corresponding interfaces of the external oil supply device, that is, the proportional valve is connected with the oil supply device through the auxiliary tool 10. In addition, the proportional valve is connected with an external control device during testing, the pressure sensor group 200 and the flowmeter group 300 are connected with an external data acquisition device, the control device is used for controlling the state of the proportional valve, and the data acquisition device is used for acquiring pressure data and flow data and calculating the performance of the proportional valve according to the acquired data. In the auxiliary tool 10 in the embodiment of the utility model, the pressure sensor group 200 and the flowmeter group 300 are integrated with the tool main body 100, so that the process of manually installing the pressure sensor group 200 and the flowmeter group 300 before each test is omitted, and the improvement of the test efficiency is facilitated. In addition, the positions of the pressure sensor group 200 and the flowmeter group 300 on the tool main body 100 are fixed all the time, so that the problems of installation difference, virtual connection and the like caused by multiple installation can be avoided, the consistency and the stability of the test process can be kept, and the accuracy of data can be improved.

In some embodiments of the present utility model, the auxiliary tool 10 further includes a proportional valve mounting plate 400, where the proportional valve mounting plate 400 is provided with a plurality of mounting ports 410, the plurality of mounting ports 410 are in one-to-one correspondence with the plurality of first interfaces, the proportional valve mounting plate 400 is used for fixedly connecting with the proportional valve, and the mounting ports 410 are used for plugging the interfaces of the proportional valve. The proportional valve mounting plate 400 is detachably connected with the tool main body 100. In performance testing of the proportional valve, the proportional valve is fixed on the proportional valve mounting plate 400, and each interface on the proportional valve is correspondingly connected with each mounting opening 410 on the proportional valve mounting plate 400 in a plugging manner. It will be appreciated that to maintain a good seal, the mounting port 410 may be provided with internal threads for mating with external threads on the interface of the proportional valve to achieve a sealed connection. If the internal threads of the mounting port 410 are damaged after a long period of use, the valve mounting plate 400 can be replaced without replacing the tool body 100. Therefore, the service life of the auxiliary tool 10 is prolonged, and the use cost of a customer is saved.

In some embodiments of the utility model, the proportional valve has a P-port, a T-port, an a-port, and a B-port. The first interfaces comprise a first P interface 111, a first T interface 112, a first A interface 113 and a first B interface 114, the second interfaces comprise a second P interface 121, a second T interface 122, a second A interface 123 and a second B interface 124, the oil channels comprise a first channel 510, a second channel 520, a third channel 530 and a fourth channel 540, the second P interface 121 is communicated with the first P interface 111 through the first channel 510, the second T interface 122 is communicated with the second T interface 122 through the second channel 520, the second A interface 123 is communicated with the first A interface 113 through the third channel 530, and the second B interface 124 is communicated with the first B interface 114 through the fourth channel 540. The first P interface 111, the first T interface 112, the first a interface 113 and the first B interface 114 are configured to be correspondingly connected with the P interface, the T interface, the a interface and the B interface of the proportional valve to be tested.

It is understood that a proportional valve having a P-port, a T-port, an a-port, and a B-port is a proportional valve that is more commonly used in hydraulic apparatuses, where the P-port represents an oil inlet, the T-port represents an oil return, and the a-port and the B-port are connected to a working port of a hydraulic actuator (e.g., a hydraulic cylinder). The auxiliary tool 10 in this embodiment is provided with a first interface and a second interface corresponding to the above-mentioned proportional valve, and thus, can be used for performance testing of the proportional valve having the P interface, the T interface, the a interface, and the B interface.

In some embodiments of the present utility model, pressure sensor set 200 includes a first pressure sensor 210, a second pressure sensor 220, a third pressure sensor 230, a fourth pressure sensor 240, and a fifth pressure sensor 250. The first pressure sensor 210 is configured to measure the pressure at the second P-interface 121, the second pressure sensor 220 is configured to measure the pressure at the first P-interface 111, the third pressure sensor 230 is configured to measure the pressure at the first T-interface 112, the fourth pressure sensor 240 is configured to measure the pressure at the first a-interface 113, and the fifth pressure sensor 250 is configured to measure the pressure at the first B-interface 114.

Since the second P-interface 121 corresponds to an oil inlet of the auxiliary tool 10, the oil inlet pressure of the auxiliary tool 10 can be obtained through the first pressure sensor 210. Accordingly, the pressure at the first P-port 111 of the auxiliary tool 10, which is also the pressure at the P-port of the proportional valve, can be obtained by means of the second pressure sensor 220; the pressure at the first T-port 112 of the auxiliary tool 10, which is also the pressure at the T-port of the proportional valve, can be obtained by means of the third pressure sensor 230; the pressure at the first a-port 113 of the auxiliary tool 10, which is also the pressure at the a-port of the proportional valve, can be obtained by means of the fourth pressure sensor 240; the pressure at the B-port of the auxiliary tool 10, which is also the pressure at the B-port of the proportional valve, can be obtained by means of the fifth pressure sensor 250.

In some embodiments of the present utility model, the first channel 510 includes a first sub-channel 511 and a second sub-channel 512, the first sub-channel 511 communicates the second P-interface 121 with the first P-interface 111, and the second sub-channel 512 communicates the second P-interface 121 with the first P-interface 111. The flowmeter array 300 includes a wide-range flowmeter 310 and a narrow-range flowmeter 320, the wide-range flowmeter 310 being disposed in the first sub-channel 511 and the narrow-range flowmeter 320 being disposed in the second sub-channel 512. The auxiliary tool 10 further comprises a first control valve 610 and a second control valve 620, wherein the first control valve 610 is arranged in the first sub-channel 511, and the second control valve 620 is arranged in the second sub-channel 512.

It will be appreciated that the wide-range flow meter 310 and the narrow-range flow meter 320 are both used for measuring the oil inlet flow, and when testing is performed, the first control valve 610 and the second control valve 620 can be controlled to be turned on or off by the first sub-channel 511 and the second sub-channel 512 according to practical situations, so that the flow meter with a proper range can be turned on, and the oil inlet flow in the test is matched with the range of the flow meter, which is beneficial to improving the testing precision.

In some embodiments of the utility model, the first channel 510 further comprises a first connecting channel 550, a first end of the first connecting channel 550 being in communication with the first sub-channel 511, a second end of the first connecting channel 550 being in communication with the second sub-channel 512, the wide range flow meter 310 and the first control valve 610 being located between the first end and the first P-interface 111, the narrow range flow meter 320 and the second control valve 620 being located between the second end and the first P-interface 111. The auxiliary tool 10 further comprises a third control valve 630, a pressure reducing valve 650 and a sequence valve 660, wherein the third control valve 630 is arranged in the first sub-channel 511 and is positioned between the first end and the second P interface 121, and the pressure reducing valve 650 and the sequence valve 660 are positioned between the second end and the second P interface 121. Is configured to pass through third control valve 630 such that oil may or may not pass through relief valve 650. Specifically, when the third control valve 630 is closed, the oil needs to pass through the pressure reducing valve 650 and the sequence valve 660 and then enter the wide-range flow meter 310 or the narrow-range flow, and when the third control valve 630 is opened, the oil does not pass through the pressure reducing valve 650 and the sequence valve 660 and directly enters the wide-range flow meter 310 or the narrow-range flow. Therefore, the oil inlet process has more selection paths, and different performance test requirements are met.

In some embodiments of the utility model, a sequence valve 660 is located between the second end and the pressure relief valve 650, the sequence valve 660 being used to ensure pilot control pressure for the primary spool opening of the proportional valve under test.

In some embodiments of the present utility model, the auxiliary tool 10 further includes a second connection channel 560 and a fourth control valve 640, the second connection communicates the third channel 530 and the fourth channel 540, and the fourth control valve 640 is disposed in the second connection channel 560. When the fourth control valve 640 is opened, the third channel 530 is conducted with the fourth channel 540, which is equivalent to the conduction of the interface a and the interface B of the proportional valve under test, so that the conduction requirement on the interface a and the interface B in a part of the test can be met.

In some embodiments of the present utility model, the first control valve 610, the second control valve 620, the third control valve 630 and the fourth control valve 640 are all solenoid ball valves, which have high control accuracy to meet the test requirements.

In some embodiments of the present utility model, the auxiliary tool 10 further includes a first stop valve 670 and a second stop valve 680, wherein the first stop valve 670 is disposed in the third channel 530 and near the first a-port 113, and the second stop valve 680 is disposed in the fourth channel 540 and near the first B-port 114. During testing, the first shut-off valve 670 and the second shut-off valve 680 may each be adjusted to a shut-off state to maintain tightness at the first a-port 113 and the first B-port 114 and prevent oil leakage.

In some embodiments of the present utility model, the tool body 100 is made of an aluminum alloy, so that the working body has high structural strength and structural rigidity, and the finishing weight is not excessive.

In some embodiments of the present utility model, the auxiliary tool 10 further includes a handle 710 mounted on the tool body 100, thereby facilitating handling of the auxiliary tool 10.

In some embodiments of the present utility model, the auxiliary tool 10 further includes a hanging ring 720 mounted on the tool body 100, so that the auxiliary tool 10 can be easily transferred by means of a hanging device.

In order to better explain the functions of the auxiliary tool 10 in the embodiment of the present utility model, the types of tests that can be performed using the auxiliary tool 10 are given below, and in particular, reference may be made to table 1, and the states of the respective control valves in the tests of the respective types are given in table 1.

Table 1 control valve actuation table

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. An auxiliary fixture for performance testing of a proportional valve, the proportional valve having a plurality of interfaces, the auxiliary fixture comprising:

the tool comprises a tool main body, wherein the tool main body is provided with a first interface group and a second interface group, the first interface group comprises a plurality of first interfaces, and the plurality of first interfaces are used for being correspondingly connected with a plurality of interfaces of the proportional valve; the second interface group comprises a plurality of second interfaces, and the second interfaces are used for being connected with corresponding interfaces of the oil supply device; the tool comprises a tool body and is characterized in that a plurality of oil liquid channels are arranged in the tool body, and each oil liquid channel is communicated with one first interface and one corresponding second interface;

the pressure sensor group comprises a plurality of pressure sensors which are arranged on the tool main body, and the pressure sensors are connected into the oil liquid channel;

the flowmeter group is installed in the tool main body, and the flowmeter group is connected into the oil liquid channel.

2. The auxiliary tool for testing the performance of the proportional valve according to claim 1, further comprising a proportional valve mounting plate, wherein a plurality of mounting ports are formed in the proportional valve mounting plate and are communicated with the first interfaces in a one-to-one correspondence manner, the proportional valve mounting plate is fixedly connected with the proportional valve, and the mounting ports are used for being spliced with the interfaces of the proportional valve;

the proportional valve mounting plate is detachably connected with the tool main body.

3. The auxiliary tool for testing the performance of the proportional valve according to claim 1, wherein the proportional valve is provided with a P interface, a T interface, an A interface and a B interface;

the plurality of first interfaces comprise a first P interface, a first T interface, a first A interface and a first B interface, the plurality of second interfaces comprise a second P interface, a second T interface, a second A interface and a second B interface, the plurality of oil channels comprise a first channel, a second channel, a third channel and a fourth channel, the second P interface is communicated with the first P interface through the first channel, the second T interface is communicated with the second T interface through the second channel, the second A interface is communicated with the first A interface through the third channel, and the second B interface is communicated with the first B interface through the fourth channel;

the first P interface, the first T interface, the first A interface and the first B interface are used for being correspondingly connected with the P interface, the T interface, the A interface and the B interface.

4. An auxiliary tool for testing performance of a proportional valve according to claim 3, wherein the pressure sensor group comprises a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor and a fifth pressure sensor;

the first pressure sensor is configured to measure the pressure at the second P-interface, the second pressure sensor is configured to measure the pressure at the first P-interface, the third pressure sensor is configured to measure the pressure at the first T-interface, the fourth pressure sensor is configured to measure the pressure at the first a-interface, and the fifth pressure sensor is configured to measure the pressure at the first B-interface.

5. The auxiliary tool for testing performance of a proportional valve according to claim 3, wherein the first channel comprises a first sub-channel and a second sub-channel, the first sub-channel is communicated with the second P interface and the first P interface, and the second sub-channel is communicated with the second P interface and the first P interface;

the flowmeter set comprises a wide-range flowmeter and a narrow-range flowmeter, the wide-range flowmeter is arranged in the first sub-channel, and the narrow-range flowmeter is arranged in the second sub-channel;

the auxiliary tool further comprises a first control valve and a second control valve, wherein the first control valve is arranged in the first sub-channel, and the second control valve is arranged in the second sub-channel.

6. The auxiliary tool for testing the performance of the proportional valve according to claim 5, wherein the first channel further comprises a first connecting channel, a first end of the first connecting channel is communicated with the first sub-channel, a second end of the first connecting channel is communicated with the second sub-channel, the wide-range flowmeter and the first control valve are located between the first end and the first P-interface, and the narrow-range flowmeter and the second control valve are located between the second end and the first P-interface;

the auxiliary tool further comprises a third control valve, a pressure reducing valve and a sequence valve, wherein the third control valve is arranged in the first sub-channel and located between the first end and the second P interface, and the pressure reducing valve and the sequence valve are located between the second end and the second P interface.

7. The auxiliary tool for testing the performance of the proportional valve according to claim 6, wherein the sequence valve is located between the second end and the pressure reducing valve.

8. The auxiliary tool for testing performance of a proportional valve according to claim 3, further comprising a second connecting channel and a fourth control valve, wherein the second connection communicates the third channel with the fourth channel, and the fourth control valve is disposed in the second connecting channel.

9. The auxiliary tool for testing performance of a proportional valve according to claim 3, further comprising a first stop valve and a second stop valve, wherein the first stop valve is arranged in the third channel and is close to the first port a, and the second stop valve is arranged in the fourth channel and is close to the first port B.

10. An auxiliary tool for testing the performance of a proportional valve according to any one of claims 1 to 9, further comprising a handle and/or a lifting ring mounted on the tool body.