A pneumatic emergency shut-off valve detection device and a detection method thereof

Abstract

The application discloses a kind of pneumatic emergency cut-off valve detection device and its detection method, it is related to detection equipment technical field.The device includes rack, the acceleration component of being arranged on the rack and the electrical control component of controlling the acceleration component, the acceleration component includes acceleration channel, and with the electrical control component electrical connection servo motor, the acceleration channel is provided with inspection platform, the servo motor can drive the inspection platform moves along the acceleration channel, the inspection platform is used to fix pneumatic emergency cut-off valve, the inspection platform is also provided with the pressure sensor of being electrically connected with the electrical control component, the pressure sensor is used to sense the change of pneumatic emergency cut-off valve cylinder pressure.Can test the reliability of pneumatic emergency cut-off valve when using, and then improve the security of vehicle using pneumatic emergency cut-off valve.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection equipment, in particular to a pneumatic emergency cut-off valve detection device and a detection method thereof. BACKGROUND

[0002] According to relevant regulations and standard requirements, all tank vehicles loaded with flammable, explosive or corrosive dangerous medium must be equipped with emergency cut-off valves. However, in most cases, the emergency cut-off valves are kept open during use. Once a pipe valve leaks or a safety accident such as a rollover or a rear-end collision occurs during vehicle operation, it is extremely likely to cause large-scale leakage of the transported medium, pollute the environment, and even cause an explosion and a major safety accident.

[0003] To this end, the standard of "Technical Conditions for Safety in Operation of Motor Vehicles" adds the requirement that "tank vehicles for transporting liquid dangerous goods equipped with emergency cut-off valves shall be designed and manufactured to ensure that the emergency cut-off valves can be automatically closed when the vehicle transporting liquid dangerous goods travels at a speed greater than 5 km / h".

[0004] In the prior art, there is no special detection device to test the reliability of the emergency cut-off valve during use, which poses a certain risk to driving safety. SUMMARY

[0005] The purpose of the present application is to provide a pneumatic emergency cut-off valve detection device and a detection method thereof, which can test the reliability of the pneumatic emergency cut-off valve during use, thereby improving the safety of vehicles using the pneumatic emergency cut-off valve.

[0006] Embodiments of the present application are implemented as follows:

[0007] In one aspect of the embodiments of the present application, a pneumatic emergency cut-off valve detection device is provided, which comprises a rack, an acceleration assembly arranged on the rack, and an electrical control assembly for controlling the acceleration assembly. The acceleration assembly comprises an acceleration channel, and a servo motor electrically connected to the electrical control assembly. A test platform is arranged on the acceleration channel, and the servo motor can drive the test platform to move along the acceleration channel. The test platform is used for fixing a pneumatic emergency cut-off valve. A pressure sensor electrically connected to the electrical control assembly is further arranged on the test platform, and the pressure sensor is used for sensing the change of the pneumatic cylinder pressure of the pneumatic emergency cut-off valve.

[0008] Optionally, the acceleration assembly further comprises a guide rail arranged on the acceleration channel, and a rack corresponding to the guide rail. A sliding block and the servo motor are arranged on the test platform, and a gear connected to the servo motor is arranged. The gear is engaged with the rack to drive the sliding block to slide along the guide rail.

[0009] Optionally, the acceleration assembly further comprises a synchronous belt arranged on the acceleration channel, and two ends of the acceleration channel are respectively provided with guide wheels to connect the synchronous belt in a head-to-tail mode, the servo motor is arranged on the rack, an output end of the servo motor is provided with a synchronous wheel for driving the synchronous belt, and the inspection platform is arranged on the synchronous belt.

[0010] Optionally, the electrical control assembly comprises a controller, and a touch screen electrically connected with the controller, and the servo motor and the pressure sensor are respectively electrically connected with the controller.

[0011] Optionally, the acceleration channel is respectively provided with a travel switch at the starting end and the terminal end, and the travel switches are electrically connected with the controller.

[0012] Optionally, the electrical control assembly further comprises an indicator lamp, and the indicator lamp is electrically connected with the controller.

[0013] Optionally, the acceleration channel has a length of 9 m to 12 m.

[0014] Optionally, the inspection platform comprises a fixing frame, and a positioning platform arranged on the fixing frame, and the positioning platform is provided with a through hole for fixing the pneumatic emergency shut-off valve.

[0015] In another aspect of the embodiment of the application, a detection method of the pneumatic emergency shut-off valve detection device is provided, which comprises:

[0016] driving the inspection platform to an initial position of the acceleration channel;

[0017] driving the servo motor to accelerate displacement of the inspection platform along the acceleration channel;

[0018] receiving a pressure signal of the pressure sensor, and acquiring a rotating speed of the servo motor;

[0019] determining a speed of the inspection platform according to the rotating speed.

[0020] Optionally, the pneumatic emergency shut-off valve detection device further comprises a touch screen and an indicator lamp electrically connected with a controller, and after the speed of the inspection platform is determined according to the rotating speed, the method further comprises:

[0021] determining whether the pneumatic emergency shut-off valve is qualified according to the speed, if the speed is less than or equal to 5 km / h, determining that the pneumatic emergency shut-off valve is qualified, and if the speed is greater than 5 km / h, determining that the pneumatic emergency shut-off valve is unqualified;

[0022] controlling the touch screen to display the determination result, and controlling the indicator lamp to display in a first color or a second color.

[0023] The beneficial effects of the embodiments of the present application include:

[0024] The pneumatic emergency cut-off valve detection device and the detection method thereof provided by the embodiments of the present application can test the reliability of the pneumatic emergency cut-off valve when the pneumatic emergency cut-off valve is used, thereby improving the safety of the vehicle using the pneumatic emergency cut-off valve. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 FIG. 1 is a structural schematic diagram of the pneumatic emergency cut-off valve detection device provided by the embodiments of the present application;

[0027] Figure 2 FIG. 2 is another structural schematic diagram of the pneumatic emergency cut-off valve detection device provided by the embodiments of the present application;

[0028] Figure 3 FIG. 3 is a flowchart of the detection method of the pneumatic emergency cut-off valve detection device provided by the embodiments of the present application.

[0029] Legend: 100-pneumatic emergency cut-off valve detection device; 105-pneumatic emergency cut-off valve; 110-rack; 120-acceleration channel; 122-guiding slide rail; 124-rack gear; 130-servo motor; 140-inspection platform; 142-sliding block; 144-gear; 146-fixing frame; 147-positioning platform; 150-touch screen; 160-wiring groove. DETAILED DESCRIPTION

[0030] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0032] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0033] In the description of the present application, it should be noted that the positions or location relations indicated by the terms "inner", "outer" and the like are based on the positions or location relations shown in the drawings, or the positions or location relations of the present application product when it is usually placed, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular position, be constructed and operated in a particular position, therefore, it cannot be understood as a limitation to the present application.

[0034] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connect", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0035] Please refer to Figure 1 and Figure 2The embodiment provides a kind of pneumatic emergency cut-off valve detection device 100, including rack 110, the acceleration assembly of being arranged on rack 110 and the electrical control assembly of controlling acceleration assembly, acceleration assembly includes acceleration channel 120, and with the servo motor 130 of electrical connection of electrical control assembly, acceleration channel 120 is provided with inspection platform 140, servo motor 130 can drive inspection platform 140 moves along acceleration channel 120, inspection platform 140 is used to fix pneumatic emergency cut-off valve 105, inspection platform 140 is also provided with the pressure sensor of electrical connection with electrical control assembly, pressure sensor is used to sense the change of pneumatic emergency cut-off valve 105 cylinder pressure.

[0036] It needs to be explained that first, pneumatic emergency cut-off valve is a kind of safety protection valve, is installed on the pipeline of flammable, explosive or corrosive dangerous medium liquid phase and gas phase, is used with remote gas source, utilizes gas source control valve opening or closing, so that when large leakage or safety accident occurs on pipeline or storage tank, cylinder pressure relief is made, valve is quickly closed and leakage is stopped, plays the role of safety protection.This embodiment takes normally closed pneumatic emergency cut-off valve as example to be described (other forms of pneumatic emergency cut-off valve are also applicable), in no gas source pressure state, valve is in closed state, when being installed on the bottom of storage tank and being used, rely on power supply control solenoid valve to convert gas source pressure and open valve, under the action of gas source pressure, valve is in open state, when needing to close valve, i.e. disconnect power supply, gas source pressure is discharged from cylinder, cylinder spring pushes piston to move downward, and valve is closed.

[0037] Second, the opening or closure of the valve of the pneumatic emergency cut-off valve 105 relies on pneumatic control, when the valve of the pneumatic emergency cut-off valve 105 is closed, there will be a pressure mutation state in the cylinder, and the pressure change is collected by the pressure sensor to determine whether the valve is closed. Compared with the conventional mode of directly collecting the valve closing process through a contact switch, the present embodiment is simpler and more effective, and can avoid the risk of damage to the collection components caused by the valve.

[0038] Third, in order to simulate the normal use environment of the pneumatic emergency cut-off valve 105, the electrical control assembly needs to provide the necessary gas source and power supply for the pneumatic emergency cut-off valve 105 to ensure the authenticity and effectiveness of the simulation, thereby improving the accuracy of the detection. In addition to the control function, the electrical control assembly can also have a gas supply function and a power supply function. The gas channel of the electrical control assembly is connected to the cylinder of the pneumatic emergency cut-off valve 105 through a solenoid valve. At the same time, the electrical control assembly provides the required power supply environment for the solenoid valve and the pressure sensor to ensure the normal operation of the electrical components. The pressure sensor on the inspection platform 140 is connected to the cylinder through a three-way joint on the connecting pipe between the solenoid valve and the cylinder to collect the pressure mutation signal in the cylinder.

[0039] Fourth, the electrical control assembly controls the servo motor 130 during acceleration, if the valve of the pneumatic emergency cut-off valve 105 is closed, the pressure sensor will collect this pressure mutation signal and feedback to the electrical control assembly. And during the operation of the servo motor 130, the encoder of the servo motor 130 will feedback the speed signal to the electrical control assembly in real time, and the electrical control assembly will compare the signals of the pressure sensor and the encoder with the set value respectively, and output a judgment signal. If the pneumatic emergency cut-off valve 105 is unqualified, when the speed provided by the servo motor 130 is greater than 5km / h, but the pressure sensor has not received the mutation signal, the electrical control assembly controls the servo motor 130 to stop, and outputs a judgment signal.

[0040] The pneumatic emergency cut-off valve detection device 100 provided by the embodiment of the application comprises a test platform 140 arranged on the acceleration channel 120, and a servo motor 130 electrically connected with the electrical control assembly. The electrical control assembly can control the start and stop of the servo motor 130, and the servo motor 130 can drive the test platform 140 to move along the acceleration channel 120 when the servo motor 130 is started. The pneumatic emergency cut-off valve 105 to be detected is arranged on the test platform 140, and when the test platform 140 moves along the acceleration channel 120 at a high speed, the pneumatic emergency cut-off valve 105 to be detected moves synchronously with the test platform 140. At a certain moment, when the emergency cut-off valve is closed, the electrical control assembly collects the rotating speed at the moment through the encoder of the servo motor 130, and then determines the moving speed of the test platform 140 according to the rotating speed, and finally determines whether the pneumatic emergency cut-off valve 105 to be detected is qualified according to the moving speed of the test platform 140. Therefore, by using the pneumatic emergency cut-off valve detection device 100, the reliability of the pneumatic emergency cut-off valve 105 in use can be tested, and the safety of the vehicle using the pneumatic emergency cut-off valve 105 can be improved.

[0041] Optionally, as shown in Figure 1 and Figure 2 The acceleration assembly further comprises a guide rail 122 arranged on the acceleration channel 120, and a rack 124 corresponding to the guide rail 122. The test platform 140 is provided with a sliding block 142 and a servo motor 130, and the servo motor 130 is connected with a gear 144. The gear 144 is engaged with the rack 124 to drive the sliding block 142 to slide along the guide rail 122.

[0042] Specifically, the extension direction of the guide rails 122 is consistent with the extension direction of the rack 124, and the two guide rails 122 are correspondingly arranged to facilitate the stable connection of the test platform 140 and the guide rails 122. In addition, the test platform 140 is slidably connected with the guide rails 122 through the sliding blocks 142. In order to ensure the stable support of the contact position, two sliding blocks 142 are arranged at the contact position with the guide rails 122. The rack 124 is used to transmit torque through the gear 144 connected with the servo motor 130, so that the test platform 140 moves along the guide rails 122. Therefore, the rack 124 can be arranged on any side of the guide rails 122, and it is not necessary to be arranged in pairs to achieve the required transmission relationship. When the servo motor 130 drives the gear 144 to rotate, the linear speed at the meshing position of the gear 144 and the rack 124 is the speed of the test platform 140. According to the known parameters of the gear 144, the critical speed of the servo motor 130 can be obtained.

[0043] Optionally, the acceleration assembly further comprises a synchronous belt arranged on the acceleration channel 120, and the two ends of the acceleration channel 120 are respectively provided with guide wheels to connect the synchronous belt end to end. The servo motor 130 is arranged on the rack 110, and the output end of the servo motor 130 is provided with a synchronous wheel for driving the synchronous belt. The test platform 140 is arranged on the synchronous belt.

[0044] Specifically, the synchronous belt is wound around the acceleration channel 120 through the guide wheels, and the synchronous wheel arranged on the servo motor 130 is in transmission connection with the synchronous belt. When the servo motor 130 rotates, the synchronous belt rotates along the acceleration channel 120. When the synchronous belt rotates, the point between the two guide wheels of the acceleration channel 120 moves linearly. At this time, the test platform 140 arranged on the synchronous belt moves linearly in a specific area (between the two guide wheels) to provide the required speed for detecting the pneumatic emergency shut-off valve 105. Similarly, according to the known parameters of the synchronous wheel, the critical speed of the servo motor 130 can be obtained, and the detection purpose is finally achieved.

[0045] Optionally, the electrical control assembly comprises a controller and a touch screen 150 electrically connected with the controller. The servo motor 130 and the pressure sensor are respectively electrically connected with the controller.

[0046] Specifically, the pressure mutation signal collected by the pressure sensor is fed back to the controller. During the operation of the servo motor 130, the encoder of the servo motor 130 also feeds back the speed signal to the controller in real time. The controller compares the signals of the pressure sensor and the encoder with the set values respectively and outputs a judgment signal. The output result is displayed through the touch screen 150, so that the detection result is more intuitive and convenient for personnel to operate.

[0047] Optionally, a travel switch is arranged at the starting end and the ending end of the acceleration channel 120 respectively, and the travel switch is electrically connected with the controller.

[0048] Specifically, by arranging the travel switch at the starting end of the acceleration channel 120, the inspection platform 140 can be reset during detection, which facilitates the detection. By arranging the travel switch at the ending end of the acceleration channel 120, the movement position of the inspection platform 140 can be controlled, so that the position of the inspection platform 140 during operation does not exceed the preset position, which improves the reliability and safety during use.

[0049] Optionally, the electrical control assembly further comprises an indicating lamp, and the indicating lamp is electrically connected with the controller. In this way, the operator can directly know the detection result through the display of the indicating lamp. For example, when the detection result is qualified, the indicating lamp can display green, and when the detection result is unqualified, the indicating lamp can display red. In this way, the operator can also obtain the detection result according to the indicating lamp when he is away from the touch screen 150, which is more simple and efficient.

[0050] Optionally, the length of the acceleration channel 120 is 9m-12m.

[0051] Specifically, the pneumatic emergency shut-off valve detection device 100 needs to provide a relatively stable acceleration for the inspection platform 140, so that the inspection platform 140 accelerates to v=5km / h or more. Assuming that the acceleration process is t=10s, then:

[0052] a=v / t=0.139m / s 2 ………………………………(1)

[0053] s=v 2 / 2a=7m……………………………………(2)

[0054] Wherein, a is the acceleration during acceleration, s is the acceleration distance required during acceleration, and considering the speed maintaining time and deceleration time and other factors, combined with formula (1) and formula (2), it can be known that in the embodiment, the length of the acceleration channel 120 is set to 9m-12m, so as to ensure the stability of the inspection platform 140 during use.

[0055] As shown in Figure 1 and Figure 2 , the inspection platform 140 comprises a fixing frame 146 and a positioning platform 147 arranged on the fixing frame 146, and the positioning platform 147 is provided with a through hole for fixing the pneumatic emergency shut-off valve 105.

[0056] Specifically, by adopting the above form, the pneumatic emergency shut-off valve 105 can be fixed and positioned, and interference between the pneumatic emergency shut-off valve 105 and the acceleration channel 120 during movement of the test platform 140 can be avoided, thereby facilitating smooth detection.

[0057] Optionally, the rack 110 is made of aluminum profile, so that the pneumatic emergency shut-off valve detection device 100 can be made lighter, and disassembly and assembly can be facilitated and difficulty thereof can be reduced.

[0058] As shown in Figure 1 The rack 110 is provided with a wiring groove 160, and the extension direction of the wiring groove 160 is consistent with the extension direction of the acceleration channel 120. In this way, when the electrical control assembly provides power for the test platform 140 or provides a power source channel for the pneumatic emergency shut-off valve 105 on the test platform 140, the wiring groove 160 can be used for wiring, so that the cable can be more easily arranged, and orderly movement of the cable during detection can be facilitated, thereby improving the stability of the detection process.

[0059] Optionally, the electrical control assembly further comprises an emergency stop button, and the emergency stop button is electrically connected with the servo motor 130. By adopting the above form, the emergency stop button can control the servo motor 130 without the controller, thereby ensuring the safety of the test platform 140 and avoiding accidents caused by failure of the controller to stop the servo motor 130 in time.

[0060] As shown in Figure 3 The embodiment of the present application further provides a detection method of the pneumatic emergency shut-off valve detection device 100, which comprises the following steps:

[0061] S100, driving the test platform 140 to the initial position of the acceleration channel 120.

[0062] Specifically, when the pneumatic emergency shut-off valve 105 is detected, the test platform 140 needs to be reset. For example, the test platform 140 can be reset manually, or the test platform 140 can be reset by controlling the forward rotation or reverse rotation of the servo motor 130, so as to facilitate detection of the pneumatic emergency shut-off valve 105.

[0063] S200, the servo motor 130 drives the test platform 140 to accelerate displacement along the acceleration channel 120;

[0064] S300, receiving the air pressure signal of the pressure sensor and obtaining the rotation speed of the servo motor 130;

[0065] S400, determining the speed of the test platform 140 according to the rotation speed.

[0066] After the pressure sensor collects the pressure mutation signal, the speed of the test platform 140 at this moment is determined, and whether the pneumatic emergency cut-off valve 105 is qualified is determined according to the speed. If the speed of the test platform 140 when the mutation signal is collected is less than or equal to the set threshold value, it is determined to be qualified. If the mutation signal has not been collected or the speed of the test platform 140 when the mutation signal is collected is greater than the set threshold value, it is determined to be unqualified.

[0067] Optionally, the pneumatic emergency cut-off valve detection device 100 further comprises a touch screen 150 and an indicator lamp electrically connected with the controller respectively. After the speed of the test platform 140 is determined according to the rotation speed, the method further comprises:

[0068] According to the speed, whether the pneumatic emergency cut-off valve 105 is qualified is determined. If the speed is less than or equal to 5km / h, the pneumatic emergency cut-off valve 105 is determined to be qualified. If the speed is greater than 5km / h, the pneumatic emergency cut-off valve 105 is determined to be unqualified. The touch screen 150 displays the determination result, and the indicator lamp displays the first color or the second color.

[0069] In this way, the determination result can be intuitively presented, which is convenient for the operator to intuitively obtain the result, can improve the automation degree of judgment, and simplify the operation difficulty.

[0070] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A device for detecting a pneumatic emergency shut-off valve, characterized in that The application relates to an acceleration device for a pneumatic emergency cut-off valve, which comprises a rack, an acceleration assembly arranged on the rack, and an electrical control assembly for controlling the acceleration assembly, wherein the acceleration assembly comprises an acceleration channel, a servo motor electrically connected to the electrical control assembly, and a test platform arranged on the acceleration channel and capable of being driven by the servo motor to move along the acceleration channel, the test platform is used for fixing the pneumatic emergency cut-off valve, and a pressure sensor electrically connected to the electrical control assembly is further arranged on the test platform and used for sensing the change of the pneumatic emergency cut-off valve cylinder pressure. The acceleration assembly further comprises a guide rail arranged on the acceleration channel and a rack corresponding to the guide rail, a sliding block and the servo motor are arranged on the test platform, and a gear connected to the servo motor is arranged on the test platform, the gear is engaged with the rack to drive the sliding block to slide along the guide rail. The electrical control assembly comprises a controller and a touch screen electrically connected to the controller, the servo motor and the pressure sensor are respectively electrically connected to the controller. Travel switches are arranged at the starting end and the ending end of the acceleration channel respectively, and the travel switches are electrically connected to the controller. The electrical control assembly further comprises an indicator lamp electrically connected to the controller.

2. The pneumatic emergency shut-off valve testing device of claim 1, wherein, The length of the acceleration channel is 9-12 m.

3. The device according to claim 1, wherein The test platform comprises a fixing frame and a positioning platform arranged on the fixing frame, and a through hole is arranged on the positioning platform and used for fixing the pneumatic emergency cut-off valve.

4. A detection method of a detection device of a pneumatic emergency shut-off valve, characterized by, The method is applied to the pneumatic emergency cut-off valve detection device, and the method comprises the following steps: driving the test platform to the initial position of the acceleration channel; driving the test platform to accelerate displacement along the acceleration channel by the servo motor; receiving the air pressure signal of the pressure sensor and acquiring the rotating speed of the servo motor; determining the speed of the test platform according to the rotating speed.

5. The detection method of the detection apparatus for the pneumatic emergency shut-off valve according to claim 4, characterized by, The pneumatic emergency cut-off valve detection device further comprises a touch screen and an indicator lamp electrically connected to the controller, and after the speed of the test platform is determined according to the rotating speed, the method further comprises the following steps: determining whether the pneumatic emergency cut-off valve is qualified according to the speed, if the speed is less than or equal to 5 km / h, the pneumatic emergency cut-off valve is determined to be qualified, and if the speed is greater than 5 km / h, the pneumatic emergency cut-off valve is determined to be unqualified; controlling the touch screen to display the determination result and controlling the indicator lamp to display in the first color or the second color.

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