Synchronization testing device and testing method for two-way stop valve

Abstract

The invention discloses a synchronism testing device and testing method for a two-way stop valve, and belongs to the technical field of valve testing, the synchronism testing device comprises a first main body and a second main body, the first main body comprises a gas access passage and a liquid access passage; the second body comprises a first medium throttling opening and a second medium throttling opening, the first medium throttling opening is connected with the first medium channel, the second medium throttling opening is connected with the second medium channel, the first medium throttling opening is connected with a first pressure sensor, and the second medium throttling opening is connected with a second pressure sensor. The synchronism testing device for the two-way stop valve can synchronously simulate the input and output conditions of the two-way stop valve so as to realize the off-line test of the two-way stop valve and obtain the synchronous opening and closing conditions of the two medium passages of the two-way stop valve, is simple in overall structure and convenient to test, and can accurately obtain the synchronous opening and closing conditions of the two-way stop valve.

Description

Technical Field

[0001] The invention belongs to the technical field of valve testing, and in particular relates to a synchronization testing device and a testing method for a two-way stop valve. Background Art

[0002] Pneumatic stop valve is a stop valve that uses compressed air as a driving source. It is mainly used to open or cut off the flow of pipelines. It has the advantages of high control accuracy, high reliability, strong adaptability and good safety performance. It can be widely used in petrochemical, electric power, pharmaceutical, food and beverage, water treatment and other industries.

[0003] In the field of liquid attitude control technology, the working medium of some engines is strong oxidant and corrosive fuel, which requires the use of electromagnetic pneumatic two-way stop valve to control the on and off of oxidant and fuel. The electromagnetic pneumatic two-way stop valve controls the action of the electromagnet through current, thereby controlling the entry and discharge of gas, and the control gas drives the piston movement of the valve core of the oxidant path and the fuel path to realize the switch of the two paths. The solenoid valve has special requirements for the synchronization of the response time of the oxidant path and the fuel path switch, and the fuel is corrosive. It is difficult to obtain the synchronization of the oxidant and fuel by conventional methods, which makes it difficult to obtain the synchronization of the electromagnetic pneumatic two-way stop valve. Summary of the invention

[0004] In response to one or more of the above defects or improvement needs in the prior art, the present invention provides a synchronization testing device for a two-way stop valve, so as to solve the problem that it is difficult to obtain the synchronous on-off status of the electromagnetic pneumatic two-way stop valve in the existing testing method. To achieve the above-mentioned object, the present invention provides a synchronization test device for a two-way stop valve, which is used to test the on-off synchronization of the two-way stop valve. The two-way stop valve includes a pneumatic passage and a medium passage, the pneumatic passage includes a first gas passage and a second gas passage, the medium passage includes a first medium passage and a second medium passage, the first gas passage is used to control the on-off of the first medium passage, and the second gas passage is used to control the on-off of the second medium passage; the synchronization test device for the two-way stop valve includes: A first body and a second body, wherein the first body and the second body are respectively arranged at two ends of the two-way stop valve, and the first body and the second body are respectively connected to the input end and the output end of the two-way stop valve; Wherein, the first body comprises a gas access passage and a liquid access passage; the gas access passage is divided in the first body and is used to connect the first gas and the second gas path respectively; the liquid access passage is divided in the first body and is used to connect the first medium path and the second medium path respectively; The second body includes a first medium throttle port and a second medium throttle port, the first medium throttle port is used to be connected to the outlet end of the first medium passage, the second medium throttle port is used to be connected to the outlet end of the second medium passage, the first medium throttle port is connected to a first pressure sensor, and the second medium throttle port is connected to a second pressure sensor.

[0005] As a further improvement of the present invention, a first medium accommodating chamber and a second medium accommodating chamber are further provided on the second main body, the first medium accommodating chamber is connected to the first medium throttling port, and the second medium accommodating chamber is connected to the second medium throttling port; The sum of the inner volume of the first medium accommodating chamber and the inner volume of the first medium throttling port is equal to the volume of the first medium docking chamber; The sum of the inner cavity volume of the second medium accommodating cavity and the inner cavity volume of the second medium throttling port is equal to the volume of the second medium docking container.

[0006] As a further improvement of the present invention, the sensing end of the first pressure sensor is vertically connected to the side wall of the first medium accommodating chamber; The sensing end of the second pressure sensor is vertically connected to the side wall of the second medium accommodating cavity.

[0007] As a further improvement of the present invention, the first body and the second body are both provided with sealing gaskets at one end facing the two-way stop valve; The first body and the second body are both connected to the two-way stop valve via threads.

[0008] As a further improvement of the present invention, it also includes a measurement and control system, which at least includes a power supply, a Hall sensor, a signal collector and a controller; The power supply is used to supply power to the two-way stop valve, the Hall sensor is used to collect the working current signal of the two-way stop valve, and the signal collector is used to collect and store the signal generated by the Hall sensor and the pressure signals of the first pressure sensor and the second pressure sensor; the controller is used to control the operation of the power supply, the Hall sensor and the signal collector, as well as process control data and output test results.

[0009] As a further improvement of the present invention, the circulating medium in the liquid access passage is water.

[0010] As a further improvement of the present invention, the present application also includes a method for testing the synchronicity of a two-way stop valve, which comprises the following steps: S1, power supply, dual-way stop valves work synchronously; S2, inputting a set standard of gas and liquid into the gas access passage and the liquid access passage of the first body respectively; S3. Obtain the time from power-on to the stabilization time of the first pressure sensor and the second pressure sensor, and cut off the power when the first pressure sensor and the second pressure sensor are stable, obtain the pressure relief time from power-off to the pressure of the first pressure sensor and the second pressure sensor dropping to the set value, and obtain the opening response time synchronization and closing response time synchronization of the first medium passage and the second medium passage of the two-way stop valve.

[0011] As a further improvement of the present invention, the acquisition of the opening response time synchronization of the first medium passage and the second medium passage of the two-way stop valve in step S3 specifically includes: The opening response time of the first medium passage of the two-way stop valve is tk1, which is calculated from the start of the two-way stop valve being energized to the time when the pressure of the first pressure sensor is stabilized and cut off. The opening response time of the second medium passage of the two-way stop valve is tk2, which is calculated from the start of the two-way stop valve being energized to the time when the pressure of the second pressure sensor is stabilized and cut off. The opening response time synchronization of the first medium passage and the second medium passage △tk= |tk2- tk1| is obtained.

[0012] As a further improvement of the present invention, the acquisition of the closing response time synchronization of the first medium passage and the second medium passage of the two-way stop valve in step S3 specifically includes: When the pressures of the first pressure sensor and the second pressure sensor are stable, the two-way stop valve is powered off and starts to release pressure; the closing response time of the first medium passage of the two-way stop valve is tg1, which is calculated from the start of power off of the two-way stop valve to the pressure of the first pressure sensor dropping to the set value; the closing response time of the second medium passage of the two-way stop valve is tg2, which is calculated from the start of power off of the two-way stop valve to the pressure of the second pressure sensor dropping to the set value; the closing response time of the second medium passage of the two-way stop valve is tg2, which is the synchronization of the closing response time of the second medium passage and the second medium passage △tg= |tg2- tg1|.

[0013] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0014] In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects: (1) The synchronization test device of the two-way stop valve of the present invention has a first body used to simulate the input end of the two-way stop valve, and is used to input the gas medium and the liquid medium into the pneumatic passage and the medium passage of the two-way stop valve respectively; the second body is used to simulate the output end of the two-way stop valve, which is connected to the ends of the first medium passage and the second medium passage of the two-way stop valve, and the first pressure sensor and the second pressure sensor are correspondingly arranged, and the synchronization of the opening and closing of the two medium passages is evaluated by sensing the medium pressure at the ends of the two medium passages. The synchronization test device of the two-way stop valve in the present application can synchronously simulate the input and output conditions of the two-way stop valve to realize the offline test of the two-way stop valve, and obtain the synchronous opening and closing conditions of the two medium passages of the two-way stop valve. Its overall structure is simple, the test is convenient, and the synchronous on-off condition of the two-way stop valve can be accurately known.

[0015] (2) The synchronization test device of the two-way stop valve of the present invention, in order to simulate the synchronous spraying of the oxidant and the fuel during the actual operation of the two-way stop valve, corresponds to setting a medium accommodating chamber and a medium throttling port on the second main body, and the sum of the volumes of the two is exactly equal to the volume of the medium docking container, that is, the sum of the volumes of the accommodating chamber and the medium throttling port on the second main body is exactly equal to the volume of the medium receiving part at the engine connected to the two-way stop valve, so that the pressure sensed by the first sensor or the second sensor is equal to the amount of medium sprayed when the two-way stop valve is working, thereby simulating the opening and closing synchronization of the oxidant path and the fuel path of the two-way stop valve during the actual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a schematic diagram of the overall structure of a synchronization testing device for a two-way stop valve in an embodiment of the present invention; Figure 2 Schematic diagram of the cross-sectional structure of a synchronism testing device for a two-way stop valve according to an embodiment of the present invention; Figure 3 It is a flow chart of a method for testing the synchronicity of a two-way stop valve in an embodiment of the present invention.

[0017] In all the drawings, the same reference numerals represent the same technical features, specifically: 1. First body; 2. Second body; 3. Two-way stop valve; 101. Gas access passage; 102. Liquid access passage; 201, first medium throttling port; 202, second medium throttling port; 203, first pressure sensor; 204, second pressure sensor; 205, first medium accommodating chamber; 206, second medium accommodating chamber. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0019] In the description of the present invention, it should be understood that, unless otherwise specified, terms such as “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0020] In addition, unless otherwise specified, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] Example: See also Figures 1 to 3 The synchronization test device of the two-way stop valve in the preferred embodiment of the present invention is used to test the on-off synchronization of the two-way stop valve 3. The two-way stop valve 3 includes a pneumatic passage and a medium passage. The pneumatic passage is related to the solenoid valve control of the two-way stop valve 3. When gas is injected into the pneumatic passage, the solenoid valve opens and closes accordingly, and the medium passage inside the two-way stop valve 3 is opened and closed accordingly, so as to realize the flow path control of the medium. Among them, the pneumatic passage includes a first gas passage and a second gas passage, and the medium passage includes a first medium passage and a second medium passage. The first gas passage is used to control the on-off of the first medium passage, and the second gas passage is used to control the on-off of the second medium passage.

[0024] For the above-mentioned two-way stop valve 3, the synchronization test device of the two-way stop valve in the present application includes a first body 1 and a second body 2, the first body 1 and the second body 2 are respectively used to be arranged at the two ends of the two-way stop valve 3, and the first body 1 and the second body 2 are respectively connected to the input end and the output end of the two-way stop valve 3. Among them, the first body 1 includes a gas access passage 101 and a liquid access passage 102, the gas access passage 101 is divided in the first body 1 and is respectively used to connect the first gas path and the second gas path; the liquid access passage 102 is divided in the first body 1 and is respectively used to connect the first medium path and the second medium path. Correspondingly, the second body 2 includes a first medium throttle port 201 and a second stop throttle port, the first medium throttle port 201 is used to be connected to the outlet end of the first medium path, the second medium throttle port 202 is used to be connected to the outlet end of the second medium path, the first medium throttle port 201 is connected to a first pressure sensor 203, and the second medium throttle port 202 is connected to a second pressure sensor 204.

[0025] Specifically, the synchronization test device of the two-way stop valve in the present application includes a first main body 1 and a second main body 2. The first main body 1 is used to simulate the input end of the two-way stop valve 3, and is used to input the gas medium and the liquid medium into the pneumatic passage and the medium passage of the two-way stop valve 3 respectively; the second main body 2 is used to simulate the output end of the two-way stop valve 3, which is connected to the ends of the first medium passage and the second medium passage of the two-way stop valve 3, and the first pressure sensor 203 and the second pressure sensor 204 are correspondingly set, and the synchronization of the opening and closing of the two medium passages is evaluated by sensing the medium pressure at the ends of the two medium passages. The synchronization test device of the two-way stop valve in the present application can synchronously simulate the input and output conditions of the two-way stop valve 3 to realize the offline test of the two-way stop valve 3, and obtain the synchronous opening and closing conditions of the two medium passages of the two-way stop valve 3. Its overall structure is simple, the test is convenient, and the synchronous on-off conditions of the two-way stop valve 3 can be accurately known.

[0026] Preferably, the two-way stop valve 3 in the present application is a flat electromagnetic pneumatic two-way stop valve 3. The working principle of the electromagnetic pneumatic two-way stop valve 3 is as follows: when the electromagnetic valve receives a control signal, the electromagnetic coil is energized to generate a magnetic field, the valve core moves, and the flow direction and on-off state of the gas are changed. The gas enters the cylinder of the pneumatic actuator through the air pipe, pushes the piston to move, drives the valve stem and the valve core to move, and realizes the opening or closing of the valve. It is worth noting that the two-way stop valve 3 in the present application is an existing test structure, and its internal structure layout is not within the protection scope of the present application, and its internal structure will not be described in detail.

[0027] Furthermore, as a preferred embodiment of the present invention, a first medium accommodating chamber 205 and a second medium accommodating chamber 206 are further provided on the second main body 2 in the present application, wherein the first medium accommodating chamber 205 is connected to the first medium throttling port 201, and the second medium accommodating chamber 206 is connected to the second medium throttling port 202, and the sum of the inner cavity volume of the first medium accommodating chamber 205 and the inner cavity volume of the first medium throttling port 201 is equal to the first medium docking chamber volume, and the sum of the inner cavity volume of the second medium accommodating chamber 206 and the inner cavity volume of the second medium throttling port 202 is equal to the second medium docking chamber volume. In order to simulate the synchronous spraying of the oxidant and the fuel of the two-way stop valve 3 during actual operation, the present application corresponds to setting a medium accommodating chamber and a medium throttling port on the second main body 2, and the sum of the volumes of the two is exactly equal to the volume of the medium docking container, that is, the sum of the volumes of the accommodating chamber and the medium throttling port on the second main body 2 is exactly equal to the volume of the medium receiving place at the engine connected to the two-way stop valve 3, so that the pressure sensed by the first sensor or the second sensor is equal to the amount of medium sprayed when the two-way stop valve 3 is working, thereby simulating the opening and closing synchronization of the oxidant path and the fuel path of the two-way stop valve 3 during actual operation.

[0028] Preferably, in the present application, the first medium accommodating chamber 205 and the second medium accommodating chamber 206 are respectively connected to the first medium passage and the second medium passage, and the size of the connection port between the first medium accommodating chamber 205 and the first medium passage is equal to the opening size at the engine receiving the oxidant, and the size of the connection port between the second medium accommodating chamber 206 and the second medium passage is equal to the opening size at the engine receiving the fuel. The same interface size enables the test device in the present application to fully simulate the actual working condition of the two-way shut-off valve 3 to ensure that the pressure data tested by the first sensor and the second sensor are equal to the pressure at the port when the output end of the two-way shut-off valve 3 is actually working, so as to accurately evaluate the response time synchronization of the oxidant path and fuel path switches.

[0029] Further, as an optional embodiment of the present invention, the sensing end of the first pressure sensor 203 in the present application is vertically connected to the side wall of the first medium accommodating chamber 205, and the sensing end of the second pressure sensor 204 is vertically connected to the side wall of the second medium accommodating chamber 206. The arrangement of the first pressure sensor 203 and the second pressure sensor 204 makes the pressure data sensed by the two equal to the pressure at the medium output port when the two-way stop valve 3 is actually working, so as to ensure the accuracy of the test.

[0030] Further, as an optional embodiment of the present invention, the first body 1 and the second body 2 in the present application are both provided with sealing gaskets at one end facing the two-way stop valve 3, and the first body 1 and the second body 2 are both connected to the two-way stop valve 3 by threads. The sealing gasket can ensure the airtightness of the connection between the first body 1, the second body 2 and the two-way stop valve 3, ensure that the gas medium and the liquid medium input from the first body 1 to the two-way stop valve 3 flow into the two-way stop valve 3, and ensure the accurate opening and closing of the two-way stop valve 3; and ensure that the liquid medium input from the two-way stop valve 3 flows into the second body 2, so as to accurately evaluate the response time synchronization of the oxidant path and the fuel recording switch. The threaded connection is used to ensure the connection stability of the first body 1, the second body 2 and the two-way stop valve 3, and ensure that the test is carried out continuously and stably.

[0031] Further, as an optional embodiment of the present invention, the synchronization test device of the two-way stop valve in the present application also includes a measurement and control system, which is used to control the operation and data acquisition of the synchronization test device of the two-way stop valve. Specifically, the measurement and control system includes a power supply, a Hall sensor, a signal collector, a controller and a display screen. Among them, the power supply is used to supply power to the two-way stop valve 3 to ensure the normal operation of the two-way stop valve 3; the Hall sensor is used to collect the working current signal of the two-way stop valve 3; the signal collector simultaneously collects and stores the signal generated by the Hall sensor, the pressure signal of the first pressure sensor 203 and the second pressure sensor 204, the controller is used to control the operation of the measurement and control system, and process the control data, output the test results, and the display screen is used to visualize the test data. Optionally, the power supply here is a DC power supply, and the display screen is a liquid crystal display screen.

[0032] Further, as an optional embodiment of the present invention, the medium flowing in the liquid access passage 102 in the present application is water. In order to avoid the corrosion of the test device by the oxidant and the fuel during the test and the influence on the test personnel, the present application replaces the medium with water, and pressurizes the water pressure through an external driving mechanism so that the pressure of the medium is the same as the pressure of the two-way stop valve 3 when it is working.

[0033] Furthermore, with respect to the above-mentioned synchronization test device of the two-way stop valve, the present application also includes a synchronization test method of the two-way stop valve 3, which includes the following steps: S1, power supply, dual-way stop valve 3 works synchronously; S2, inputting set standard gas and liquid into the gas access passage 101 and the liquid access passage 102 of the first body 1 respectively; S3, obtain the time from power-on to the stabilization of the first pressure sensor 203 and the second pressure sensor 204, and cut off the power when the first pressure sensor 203 and the second pressure sensor are stable, obtain the pressure relief time from power-off to the pressure of the first pressure sensor 203 and the second pressure sensor 204 dropping to the set value, and obtain the opening response time synchronization and closing response time synchronization of the first medium passage and the second medium passage of the two-way stop valve 3.

[0034] Preferably, in the above step S3, obtaining the synchronization of the opening response time of the first medium passage and the second medium passage of the two-way stop valve 3 specifically includes: The opening response time of the first medium passage of the two-way stop valve 3 is tk1, which is calculated from the start of the power-on of the two-way stop valve 3 to the stable pressure cut-off of the first pressure sensor 203; the opening response time of the second medium passage of the two-way stop valve 3 is tk2, which is calculated from the start of the power-on of the two-way stop valve 3 to the stable pressure cut-off of the second pressure sensor 204. The opening response time synchronization of the first medium passage and the second medium passage △tk= |tk2- tk1| is obtained.

[0035] Preferably, in the above step S3, the acquisition of the closing response time synchronization of the first medium passage and the second medium passage of the two-way stop valve 3 specifically includes: When the pressure of the first pressure sensor 203 and the second pressure sensor 204 is stable, the two-way stop valve 3 is powered off and the two-way stop valve 3 starts to release pressure; the closing response time of the first medium passage of the two-way stop valve 3 is tg1, which is calculated from the start of the power-off of the two-way stop valve 3 to the pressure of the first pressure sensor 203 dropping to the set value; the closing response time of the second medium passage of the two-way stop valve 3 is tg2, which is calculated from the start of the power-off of the two-way stop valve 3 to the pressure of the second pressure sensor 204 dropping to the set value, which is obtained, and the closing response time synchronization of the second medium passage and the second medium passage is obtained. Among them, the power-on time and the power-off time of the two-way stop valve 3 are both sensed by the above-mentioned Hall sensor. Specifically, the pressure setting values ​​at the first medium accommodating chamber 205 and the second medium accommodating chamber 206 sensed by the first pressure sensor 203 and the second pressure sensor 204 here usually fluctuate around the 0 line, that is, when the actual pressure in the first medium accommodating chamber 205 and the second medium accommodating chamber 206 is 0, but the pressure actually measured by the first pressure sensor 203 and the second pressure sensor 204 fluctuates around 0, so the actual readings of the two pressure sensors when the pressure in the first medium accommodating chamber 205 and the second medium accommodating chamber 206 is 0 can be preliminarily calibrated, and used as the setting values ​​of the first pressure sensor 203 and the second pressure sensor 204.

[0036] It is worth noting that a certain deviation is usually set for the synchronization of the opening and closing response time of the two-way stop valve 3, that is, when △tk and △tg are both within the set standard threshold, the on-off synchronization response time of the two-way stop valve 3 meets the standard; conversely, when △tk and △tg are both greater than the standard set threshold, the on-off synchronization response time of the two-way stop valve 3 does not meet the standard.

[0037] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A synchronization test device for a two-way stop valve, used for testing the on-off synchronization of the two-way stop valve, wherein the two-way stop valve comprises a pneumatic passage and a medium passage, wherein the pneumatic passage comprises a first gas passage and a second gas passage, wherein the medium passage comprises a first medium passage and a second medium passage, wherein the first gas passage is used for controlling the on-off of the first medium passage, and the second gas passage is used for controlling the on-off of the second medium passage; characterized in that: The synchronization testing device of the two-way stop valve comprises: A first body and a second body, wherein the first body and the second body are respectively arranged at two ends of the two-way stop valve, and the first body and the second body are respectively connected to the input end and the output end of the two-way stop valve; Wherein, the first body comprises a gas access passage and a liquid access passage; the gas access passage is divided in the first body and is used to connect the first gas path and the second gas path respectively; the liquid access passage is divided in the first body and is used to connect the first medium path and the second medium path respectively; The second body includes a first medium throttle port and a second medium throttle port, the first medium throttle port is used to be connected to the outlet end of the first medium passage, the second medium throttle port is used to be connected to the outlet end of the second medium passage, the first medium throttle port is connected to a first pressure sensor, and the second medium throttle port is connected to a second pressure sensor.

2. The synchronization testing device for the two-way stop valve according to claim 1 is characterized in that: The second main body is also provided with a first medium accommodating chamber and a second medium accommodating chamber, the first medium accommodating chamber is connected to the first medium throttling port, and the second medium accommodating chamber is connected to the second medium throttling port; The sum of the inner volume of the first medium accommodating chamber and the inner volume of the first medium throttling port is equal to the volume of the first medium docking chamber; The sum of the inner cavity volume of the second medium accommodating cavity and the inner cavity volume of the second medium throttling port is equal to the volume of the second medium docking container.

3. The synchronization testing device for a two-way stop valve according to claim 2, characterized in that: The sensing end of the first pressure sensor is vertically connected to the side wall of the first medium accommodating chamber; The sensing end of the second pressure sensor is vertically connected to the side wall of the second medium accommodating cavity.

4. The synchronization testing device for a two-way stop valve according to claim 1, characterized in that: The first body and the second body are both provided with sealing gaskets at one end facing the two-way stop valve; The first body and the second body are both connected to the two-way stop valve via threads.

5. The synchronization testing device for a two-way stop valve according to claim 1, characterized in that: It also includes a measurement and control system, which includes at least a power supply, a Hall sensor, a signal collector and a controller; The power supply is used to supply power to the two-way stop valve; the Hall sensor is used to collect the working current signal of the two-way stop valve; the signal collector is used to collect and store the signal generated by the Hall sensor, the pressure signals of the first pressure sensor and the second pressure sensor; the controller is used to control the operation of the power supply, the Hall sensor and the signal collector, as well as process control data and output test results.

6. The synchronization testing device for a two-way stop valve according to claim 1, characterized in that: The flowing medium in the liquid access passage is water.

7. A method for testing the synchronicity of a two-way stop valve, characterized in that: The test is performed by the synchronization test device for the two-way stop valve as claimed in any one of claims 1 to 6, comprising the following steps: S1, power supply, dual-way stop valves work synchronously; S2, inputting a set standard of gas and liquid into the gas access passage and the liquid access passage of the first body respectively; S3. Obtain the time from power-on to the stabilization time of the first pressure sensor and the second pressure sensor, and cut off the power when the first pressure sensor and the second pressure sensor are stable, obtain the pressure relief time from power-off to the pressure of the first pressure sensor and the second pressure sensor dropping to the set value, and obtain the opening response time synchronization and closing response time synchronization of the first medium passage and the second medium passage of the two-way stop valve.

8. The method for testing the synchronicity of a two-way stop valve according to claim 7, characterized in that: The acquisition of the opening response time synchronization of the first medium passage and the second medium passage of the two-way stop valve in step S3 specifically includes: The opening response time of the first medium passage of the two-way stop valve is tk1, which is calculated from the start of the two-way stop valve being energized to the time when the pressure of the first pressure sensor is stabilized and cut off. The opening response time of the second medium passage of the two-way stop valve is tk2, which is calculated from the start of the two-way stop valve being energized to the time when the pressure of the second pressure sensor is stabilized and cut off. The opening response time synchronization of the first medium passage and the second medium passage △tk= |tk2- tk1| is obtained.

9. The method for testing the synchronicity of a two-way stop valve according to claim 7, characterized in that: The acquisition of the closing response time synchronization of the first medium passage and the second medium passage of the two-way stop valve in step S3 specifically includes: When the pressures of the first pressure sensor and the second pressure sensor are stable, the two-way stop valve is powered off and starts to release pressure; the closing response time of the first medium passage of the two-way stop valve is tg1, which is calculated from the start of power off of the two-way stop valve to the pressure of the first pressure sensor dropping to the set value; the closing response time of the second medium passage of the two-way stop valve is tg2, which is calculated from the start of power off of the two-way stop valve to the pressure of the second pressure sensor dropping to the set value; the closing response time of the second medium passage of the two-way stop valve is tg2, which is the synchronization of the closing response time of the second medium passage and the second medium passage △tg= |tg2- tg1|.

Images