Gas filling gun electrostatic discharge device

Abstract

The utility model discloses a gas filling gun electrostatic discharge device, which is applied to a gas filling gun, and comprises an alarm connected with one end of the gas filling gun; the grounding body is connected with the alarm; the fixing ring is arranged at the other end of the gas filling gun in a sleeving manner; the ejector pin is arranged on the fixing ring in a resettable mode and connected with the alarm, and when the gas filling gun is in a standby state, one end of the ejector pin makes contact with the fixing ring, so that the grounding body, the alarm, the gas filling gun, the fixing ring and the ejector pin are sequentially connected to form a first detection loop. According to the electrostatic discharge device for the gas filling gun, after gas filling is completed and the gas filling gun is moved away, the ejector pin can automatically reset and recover to the first detection loop state in the standby state. According to the structural design, operation is convenient, manual intervention is reduced, long-term stable operation of the device is guaranteed due to the stable and durable structure, and the maintenance cost is reduced.

Description

Technical Field

[0001] This application relates to the field of fuel refueling technology, and in particular to an electrostatic discharge device for a gas refueling gun. Background Technology

[0002] In the field of LNG vehicle refueling, electrostatic discharge (ESD) protection systems have been incorporated into a mandatory standard system, including GB 50156-2021 "Code for Design and Construction of Gas Stations for Automobiles," which requires refueling equipment to be equipped with reliable ESD release devices. During refueling, static charge accumulates, and if not released in time, it can cause a fire. Currently, stations mainly use mechanical contact for ESD release, i.e., a separate alligator clip grounding device is used before refueling, relying on manual operation for physical connection. The charge accumulated through the grounding resistance is transferred from the vehicle to the ground.

[0003] Traditional electrostatic grounding clamps have many technical drawbacks in equipment operation and maintenance. For example, employees may operate them improperly due to negligence or lack of training, failing to use them correctly or in accordance with regulations. Alternatively, the clamps need to be manually checked and bent over to retrieve them before each refueling, which is inefficient and adds physical burden to employees during peak refueling periods, making them inconvenient to use. Utility Model Content

[0004] The purpose of this application is to provide an electrostatic discharge device for a gas gun, comprising:

[0005] An alarm is connected to one end of the gas gun;

[0006] A grounding electrode, which is connected to the alarm;

[0007] A retaining ring is fitted onto the other end of the gas gun;

[0008] A pin is repositionably mounted on the fixed ring and connected to the alarm. When the gas gun is in standby mode, one end of the pin contacts the fixed ring, so that the grounding body, the alarm, the gas gun, the fixed ring, and the pin are sequentially connected to form a first detection circuit.

[0009] An insulating guide sleeve is disposed between the ejector pin and the fixing ring. When the gas gun is in operation, the ejector pin is obstructed by the vehicle body to move away from the vehicle body along the fixing ring, and the insulating guide sleeve disconnects the ejector pin from the fixing ring.

[0010] As an optional embodiment, one end of the gas nozzle is connected to the alarm via a gas hose and a first line in sequence, so that when the gas nozzle is in working condition, the grounding body, the alarm, the first line, the gas hose and the gas nozzle are connected in sequence to form a first release circuit, which is used to release the static electricity of the vehicle body.

[0011] As an optional embodiment, the alarm is connected to one end of the ejector pin via a second line, so that when the gas gun is in working condition, the grounding body, the alarm, the second line and the ejector pin are sequentially connected to form a second release circuit, which is used to release the static electricity of the vehicle body.

[0012] As an optional embodiment, when both the ejector pin and the gas gun are in contact with the vehicle body, the first release circuit and the second release circuit are connected through the vehicle body to form a second detection circuit.

[0013] As an optional embodiment, a notch is provided on the ring body of the fixing ring, and a fastener is provided at the notch, the fastener being used to connect the fixing ring to the gas gun.

[0014] As an optional embodiment, the outer peripheral wall of the fixing ring is provided with a guide portion extending outward in its radial direction, the guide portion having a guide hole, and the insulating guide sleeve passing through the guide hole.

[0015] As an optional embodiment, the insulating guide sleeve includes a stepped portion and a sleeve body connected to the stepped portion. The stepped portion is located outside the guide hole and contacts the guide portion, and the sleeve body passes through the guide hole.

[0016] As an optional embodiment, the ejector pin includes a contact portion, a grounding portion, and a mounting portion for connecting the contact portion and the grounding portion. The contact portion is used to contact the vehicle body, the mounting portion passes through the sleeve, a gap is provided between the end face of the grounding portion and the end face of the sleeve, the grounding portion is located outside the guide hole and can contact the guide portion.

[0017] As an optional embodiment, the diameter of the mounting portion is smaller than the diameter of the contact portion and the grounding portion, respectively, so as to form a mounting groove between the contact portion and the step portion. A spring is sleeved on the mounting groove, and the two ends of the spring contact the contact portion and the step portion, respectively, so that the grounding portion can contact the guide portion.

[0018] As an optional embodiment, the contact portion has a tapered structure with a tapered angle of 30°.

[0019] The beneficial effects of the embodiments of this application are as follows:

[0020] The electrostatic discharge device for the gas gun in this application allows the ejector pin to automatically reset after the gas gun is removed, returning to the first detection circuit state during standby. This structural design not only facilitates operation and reduces manual intervention, but also ensures long-term stable operation of the device and reduces maintenance costs due to its stable and durable structure.

[0021] This application utilizes a first detection circuit during standby and a second detection circuit during operation to comprehensively check the conductivity of the circuits and the connection status of each component. In case of any abnormality, the alarm will immediately sound, prompting maintenance and ensuring that the device is in good working condition during both standby and operation. This further guarantees the safety and reliability of the entire LNG refueling process and reduces the risk of accidents.

[0022] This application discharges through a first release circuit and a second release circuit, with the dual release paths working simultaneously, which greatly improves the reliability of static electricity discharge from the vehicle body and quickly conducts static electricity to the ground through the grounding body, effectively avoiding safety hazards caused by static electricity accumulation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the electrostatic discharge device for a gas gun according to an embodiment of this application;

[0024] Figure 2 This is an isometric view of the electrostatic discharge device for an air gun according to an embodiment of this application;

[0025] Figure 3 This is an exploded view of the retaining ring and ejector pin according to an embodiment of this application;

[0026] Figure 4 This is a cross-sectional view of the retaining ring and ejector pin of this application embodiment in the standby state of the gas gun;

[0027] Figure 5 This is a cross-sectional view of the retaining ring and ejector pin in the working state of the air gun according to an embodiment of this application.

[0028] in,

[0029] 1. Gas gun; 2. Gas hose; 3. First circuit; 4. Second circuit; 5. Alarm; 6. Grounding electrode; 7. Fixing ring; 71. Guide part; 72. Guide hole; 8. Pin; 81. Contact part; 82. Grounding part; 83. Mounting part; 9. Insulating guide sleeve; 91. Step part; 92. Sleeve body; 10. Spring. Detailed Implementation

[0030] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0031] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this application will be apparent to those skilled in the art.

[0032] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0033] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0034] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application.

[0035] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0036] Specific embodiments of this application are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in a variety of substantially any suitable detailed structures.

[0037] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0038] An embodiment of this application provides an electrostatic discharge device for a gas gun, such as... Figures 1-3 As shown, it includes an alarm 5, a grounding body 6, a fixing ring 7, a pin 8, and an insulating sleeve 9.

[0039] The alarm 5 is connected to one end of the gas nozzle 1. The alarm 5 is a device used to issue an alarm signal. When an abnormal situation occurs (such as static electricity not being properly discharged), it can issue a warning to remind the operator.

[0040] Specifically, the detection module inside alarm 5 constantly monitors the circuit path status. If the path is intact and the resistance is below the set safety threshold, it is considered to be in a good grounding state. If there is poor contact or an open circuit in one of the lines, alarm 5 will sound an alarm.

[0041] The grounding electrode 6 is connected to the alarm 5. The grounding electrode 6 is a conductor well-connected to the earth, used to conduct static electricity into the ground and release it. A common example is a metal rod or plate buried underground as the grounding electrode 6.

[0042] The fixing ring 7 is sleeved on the other end of the gas gun 1, serving to fix and provide structural support, and cooperates with other components to form a circuit. The fixing ring 7 is made of stainless steel.

[0043] The ejector pin 8 is repositionably mounted on the fixing ring 7 and connected to the alarm 5. When the gas gun 1 is in standby mode, one end of the ejector pin 8 contacts the fixing ring 7, so that the grounding body 6, the alarm 5, the gas gun 1, the fixing ring 7, and the ejector pin 8 are sequentially connected to form a first detection circuit. The contact state between the ejector pin 8 and the fixing ring 7 varies depending on the condition. After being moved by an external force, the ejector pin 8 returns to its original position when the force disappears.

[0044] The insulating guide sleeve 9 is disposed between the ejector pin 8 and the fixing ring 7. When the gas gun 1 is in operation, the ejector pin 8 is obstructed by the vehicle body and moves away from the vehicle body along the fixing ring 7, and the insulating guide sleeve 9 disconnects the ejector pin 8 from the fixing ring 7. The insulating guide sleeve 9 is a sleeve-shaped component with insulating properties, used to disconnect the ejector pin 8 from the fixing ring 7 when the gas gun 1 is in operation. For example, the insulating guide sleeve 9 is made of polytetrafluoroethylene (PTFE).

[0045] When this application is used, such as Figure 4 As shown, at an LNG refueling station, when the refueling gun 1 is idle and not in use, the refueling gun 1 is in standby mode. At this time, one end of the ejector pin 8 is in contact with the fixing ring 7. The grounding body 6, the alarm 5, the refueling gun 1, the fixing ring 7 and the ejector pin 8 are connected in sequence to form the first detection circuit (at this time, the ejector pin 8 is also connected to the alarm 5), which can detect whether the entire device is normal.

[0046] like Figure 5 As shown, when preparing to refuel the vehicle, the refueling gun 1 approaches the vehicle body, the ejector pin 8 is pushed open by the vehicle body, and the refueling gun 1 is in working condition. At this time, the ejector pin 8 is obstructed by the vehicle body and moves away from the vehicle body along the fixing ring 7. The insulating guide sleeve 9 makes the ejector pin 8 disconnect from the fixing ring 7.

[0047] This application, by setting up a first detection circuit, can detect whether the device is working properly before gas filling, ensuring the reliability of electrostatic discharge during gas filling; by using the insulating guide sleeve 9 to disconnect the ejector pin 8 from the fixing ring 7 in the working state, the on / off state of the circuit can be effectively controlled.

[0048] Furthermore, the use of alloy steel ejector pins 8 paired with stainless steel retaining rings 7 significantly enhances the durability of the device by leveraging their stable physical and chemical properties. Compared to traditional equipment that is prone to performance degradation due to corrosion and wear, this device has a significantly extended service life, thereby reducing the frequency of annual maintenance and ensuring the continuous and stable electrostatic discharge function during gas refueling.

[0049] Through the above design, the single operation time for electrostatic release of the gas nozzle 1 is reduced from the traditional 5 seconds to almost instantaneous completion. During peak vehicle refueling periods, this significantly saves operation time, effectively reduces the physical burden on employees, improves overall operational efficiency, and provides strong support for labor protection.

[0050] Key components of the device in this application (such as the fixing ring 7 and the insulating guide sleeve 9) can be replaced individually. When a component malfunctions, there is no need to replace the entire device, reducing maintenance time and costs. This solves the high cost problem caused by frequent replacements of traditional equipment and improves the economy and operational efficiency of the equipment.

[0051] like Figure 1 As shown, in one embodiment, one end of the gas nozzle 1 is connected to the alarm 5 in sequence via the gas hose 2 and the first line 3, so that when the gas nozzle 1 is in the working state, the grounding body 6, the alarm 5, the first line 3, the gas hose 2 and the gas nozzle 1 are connected in sequence to form a first release circuit, which is used to release the static electricity of the vehicle body.

[0052] The refueling hose 2 is a flexible pipe connecting the refueling nozzle 1 and the gas source, used to transport LNG. The first line 3 is a conductive line connecting the refueling hose 2 and the alarm 5, and the length of the first line 3 can be designed to be about 6.5m.

[0053] When this application is used to refuel LNG vehicles, the refueling gun 1 comes into contact with the vehicle body, and the static electricity on the vehicle body is released to the ground through the refueling gun 1, the refueling hose 2, the first line 3, the alarm 5, and finally through the grounding body 6.

[0054] This application can form a dedicated first release circuit, providing a reliable release path for static electricity in the vehicle body, ensuring the safety of the refueling process, and preventing dangers caused by static electricity.

[0055] like Figure 1As shown, in one embodiment, the alarm 5 is connected to one end of the ejector pin 8 via a second line 4, so that when the gas gun 1 is in the working state, the grounding body 6, the alarm 5, the second line 4, and the ejector pin 8 are sequentially connected to form a second release circuit, which is used to release static electricity from the vehicle body. The length of the second line 4 can be designed to be approximately 6.5m.

[0056] When this application is in use, with the gas gun 1 in working condition, during the gas refueling process, the static electricity of the vehicle body can also be released to the ground through the ejector pin 8, the second line 4, the alarm 5, and the grounding body 6.

[0057] This application adds a second release circuit, providing an additional electrostatic discharge path and further improving the reliability and safety of electrostatic discharge. Even if one circuit fails, there are still other paths to release static electricity.

[0058] In one embodiment, when both the ejector pin 8 and the gas gun 1 are in contact with the vehicle body, the first release circuit and the second release circuit are connected through the vehicle body to form a second detection circuit.

[0059] In this embodiment, during the gas filling process, if both the ejector pin 8 and the gas filling gun 1 are in good contact with the vehicle body, the status of the second detection circuit can be used to determine whether the electrostatic discharge system is functioning properly. That is, even when the gas filling gun 1 is in operation, it is still possible to detect whether the entire electrostatic discharge system is working properly.

[0060] This application, by forming a second detection circuit, can monitor the integrity of the electrostatic discharge system in real time during operation, promptly detect potential problems, and ensure gas refueling safety.

[0061] like Figure 1 and Figure 3 As shown, in one embodiment, a notch is provided on the ring body of the fixing ring 7, and a fastener is provided at the notch. The fastener is used to connect the fixing ring 7 to the gas gun 1.

[0062] In this embodiment, the notch is a discontinuous part opened on the ring body of the fixing ring 7, and the fastener can be a bolt, nut, etc.

[0063] In use, the retaining ring 7 is installed on the gas gun 1 through the notch, and bolts and nuts are used as fasteners and tightened. This facilitates the installation and removal of the retaining ring 7, makes it easy to maintain and repair the device, and ensures the firmness of the connection between the retaining ring 7 and the gas gun 1.

[0064] like Figure 3As shown, in one embodiment, the outer peripheral wall of the fixing ring 7 is provided with a guide portion 71 extending outward in its radial direction. The guide portion 71 has a guide hole 72, and the insulating guide sleeve 9 passes through the guide hole 72. The insulating guide sleeve 9 passes through the guide hole 72 of the guide portion 71, which guides and positions the movement of the ejector pin 8, while ensuring the insulation between the ejector pin 8 and the fixing ring 7.

[0065] like Figure 3 As shown, in one embodiment, the insulating guide sleeve 9 includes a stepped portion 91 and a sleeve body 92 connected to the stepped portion 91. The stepped portion 91 is located outside the guide hole 72 and contacts the guide portion 71. The sleeve body 92 passes through the guide hole 72.

[0066] When installing the insulating guide sleeve 9, the stepped portion 91 is aligned with the outer side of the guide portion 71, and the sleeve body 92 is inserted into the guide hole 72. This facilitates the positioning and fixing of the insulating guide sleeve 9 during installation, ensuring its stability. Furthermore, it facilitates the installation and fixing of the insulating guide sleeve 9, ensuring its stability during operation, thereby ensuring the insulation effect between the ejector pin 8 and the fixing ring 7.

[0067] like Figure 3 As shown, in one embodiment, the ejector pin 8 includes a contact portion 81, a grounding portion 82, and a mounting portion 83 for connecting the contact portion 81 and the grounding portion 82. The contact portion 81 is used to contact the vehicle body, and the mounting portion 83 passes through the sleeve 92. A gap is provided between the end face of the grounding portion 82 and the end face of the sleeve 92. The grounding portion 82 is located outside the guide hole 72 and can contact the guide portion 71.

[0068] The contact part 81 conducts static electricity through contact with the vehicle body, the mounting part 83 passes through the sleeve 92, and the grounding part 82 can contact the guide part 71 to achieve grounding. The gap ensures a certain amount of movement space and insulation performance. During refueling, the contact part 81 contacts the LNG vehicle, conducting the static electricity from the vehicle body to the ejector pin 8, and the grounding part 82 contacts the guide part 71, releasing the static electricity through the grounding body 6.

[0069] The design of the ejector pin 8 in this application is reasonable, and the division of labor among the parts is clear, which ensures the effective conduction and release of static electricity. At the same time, the setting of the gap can avoid unnecessary contact between the grounding part 82 and the sleeve 92, thus ensuring the insulation performance.

[0070] like Figure 3As shown, in one embodiment, the diameter of the mounting portion 83 is smaller than the diameters of the contact portion 81 and the grounding portion 82, respectively, to form a mounting groove between the contact portion 81 and the stepped portion 91. A spring 10 is fitted onto the mounting groove, with both ends of the spring 10 contacting the contact portion 81 and the stepped portion 91, respectively, so that the grounding portion 82 can contact the guide portion 71. The spring 10 is made of stainless steel with a wire diameter of approximately 0.8 mm and a compression stroke designed to be 8-10 mm.

[0071] Spring 10 is fitted onto the mounting groove, with its two ends contacting the contact part 81 and the step part 91 respectively. When the ejector pin 8 is moved by external force, spring 10 can provide a restoring force, so that the grounding part 82 can contact the guide part 71, ensuring the continuity of the circuit.

[0072] Specifically, when the ejector pin 8 is pushed open by the vehicle body, the spring 10 is compressed, and the grounding part 82 loses contact with the guide part 71. When the vehicle body moves away, the spring 10 returns to its original state, causing the ejector pin 8 to reset, and the grounding part 82 contacts the guide part 71.

[0073] This application achieves the resettable function of the ejector pin 8 by setting the spring 10, which ensures the normal operation of the device under different states and improves the reliability and stability of the device.

[0074] In one embodiment, the contact portion 81 has a conical structure with a cone angle of 30°. In this embodiment, the ejector pin 8 is made of alloy steel, and the conical contact portion 81 can better fit the surface of the vehicle body when in contact with the vehicle body, thereby improving the efficiency of electrostatic conduction.

[0075] In summary, as Figure 1 and Figure 4 As shown, the usage process of this application when the gas gun 1 is in standby mode is as follows:

[0076] Since one end of the alarm 5 and the gas gun 1 are connected through the gas hose 2 and the first line 3, the grounding body 6 is connected to the alarm 5, and the pin 8 is connected to the alarm 5 through the second line 4, the starting point of the first detection circuit is the grounding body 6, which passes through the alarm 5, the gas gun 1, the fixing ring 7, and the pin 8 before returning to the alarm 5, thus forming the first detection circuit.

[0077] After the first detection circuit is established, the entire electrostatic discharge device of the gas gun is tested. The system checks whether the conductivity of the circuit is normal, determines whether the connections between components are good, and whether there are any open circuits or poor contacts. If an abnormality is detected in the circuit, alarm 5 will issue an alarm signal to prompt the operator to check and repair. If the test is normal, the device is in standby ready state, waiting for gas refueling operation.

[0078] like Figure 1and Figure 5 As shown, the usage process of this application when the gas gun 1 is in working state is as follows:

[0079] When refueling an LNG vehicle, the operator holds the refueling nozzle 1 close to the vehicle body. At this time, the vehicle body obstructs the ejector pin 8, causing the ejector pin 8 to move away from the vehicle body along the retaining ring 7. Due to the presence of the insulating guide sleeve 9, the ejector pin 8 loses contact with the retaining ring 7. Both the contact portion 81 of the ejector pin 8 and the refueling nozzle 1 are in contact with the surface of the vehicle body to form a first release circuit and a second release circuit to conduct static electricity on the vehicle body.

[0080] Specifically, when the gas nozzle 1 is in operation, the grounding electrode 6, the alarm 5, the first circuit 3, the gas hose 2, and the gas nozzle 1 are connected in sequence to form the first release circuit. Static electricity on the vehicle body is released to the ground through the gas nozzle 1, the gas hose 2, the first circuit 3, the alarm 5, and finally the grounding electrode 6.

[0081] Simultaneously, the alarm 5 is connected to one end of the pin 8 via the second line 4, and the grounding body 6, alarm 5, second line 4, and pin 8 are connected in sequence to form a second release circuit. Static electricity on the vehicle body can also be released to the ground through the pin 8, second line 4, alarm 5, and grounding body 6.

[0082] These two discharge circuits work simultaneously, providing a dual discharge path for static electricity in the vehicle body and improving the reliability of static electricity discharge.

[0083] In addition, when the contact part 81 of the ejector pin 8 contacts the vehicle body and the gas gun 1 also contacts the vehicle body, the first release circuit and the second release circuit are connected through the vehicle body to form the second detection circuit.

[0084] During the gas refueling process, the system monitors the status of the second detection circuit in real time to determine whether the entire electrostatic discharge system is functioning properly. If an abnormality occurs in the second detection circuit, alarm 5 will sound an alarm, alerting the operator that there may be an electrostatic discharge problem, requiring the gas refueling operation to be stopped and an inspection to be conducted.

[0085] After the gas refueling operation is completed, the operator removes the gas nozzle 1 from the vehicle body. At this time, the external force acting on the ejector pin 8 disappears. Since the two ends of the spring 10 sleeved on the mounting groove are in contact with the contact part 81 and the step part 91 respectively, the spring 10 provides a restoring force, causing the ejector pin 8 to return to its original position. One end of the ejector pin 8 then contacts the retaining ring 7 again, and the device returns to the first detection circuit state in standby mode, waiting for the next gas refueling operation.

[0086] Through the above usage process in standby and working states, the electrostatic discharge device of the refueling gun can effectively detect the device status, release static electricity from the vehicle body, and monitor the operation of the electrostatic discharge system in real time, ensuring the safety and reliability of the LNG refueling process.

[0087] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. An electrostatic discharge device for a gas gun, characterized in that, include: An alarm, which is connected to one end of the gas nozzle; A grounding electrode, which is connected to the alarm; A retaining ring is fitted onto the other end of the gas gun; A pin is repositionably mounted on the fixed ring and connected to the alarm. When the gas gun is in standby mode, one end of the pin contacts the fixed ring, so that the grounding body, the alarm, the gas gun, the fixed ring, and the pin are sequentially connected to form a first detection circuit. An insulating guide sleeve is disposed between the ejector pin and the fixing ring. When the gas gun is in operation, the ejector pin is obstructed by the vehicle body to move away from the vehicle body along the fixing ring, and the insulating guide sleeve disconnects the ejector pin from the fixing ring.

2. The electrostatic discharge device for a gas gun as described in claim 1, characterized in that, One end of the gas nozzle is connected to the alarm via a gas hose and a first line in sequence, so that when the gas nozzle is in working condition, the grounding body, the alarm, the first line, the gas hose and the gas nozzle are connected in sequence to form a first release circuit, which is used to release the static electricity of the vehicle body.

3. The electrostatic discharge device for a gas gun as described in claim 2, characterized in that, The alarm is connected to one end of the ejector pin via a second line, so that when the gas gun is in working condition, the grounding body, the alarm, the second line, and the ejector pin are sequentially connected to form a second release circuit, which is used to release the static electricity of the vehicle body.

4. The electrostatic discharge device for a gas gun as described in claim 3, characterized in that, When both the ejector pin and the gas gun are in contact with the vehicle body, the first release circuit and the second release circuit are connected through the vehicle body to form a second detection circuit.

5. The electrostatic discharge device for a gas gun as described in claim 1, characterized in that, The fixing ring has a notch, and a fastener is provided at the notch. The fastener is used to connect the fixing ring to the gas gun.

6. The electrostatic discharge device for a gas gun as described in claim 5, characterized in that, The outer peripheral wall of the fixed ring is provided with a guide portion extending outward in its radial direction. The guide portion has a guide hole, and the insulating guide sleeve passes through the guide hole.

7. The electrostatic discharge device for a gas gun as described in claim 6, characterized in that, The insulating guide sleeve includes a stepped portion and a sleeve body connected to the stepped portion. The stepped portion is located outside the guide hole and contacts the guide portion. The sleeve body passes through the guide hole.

8. The electrostatic discharge device for a gas gun as described in claim 7, characterized in that, The ejector pin includes a contact portion, a grounding portion, and a mounting portion for connecting the contact portion and the grounding portion. The contact portion is used to contact the vehicle body, and the mounting portion passes through the sleeve. A gap is provided between the end face of the grounding portion and the end face of the sleeve. The grounding portion is located outside the guide hole and can contact the guide portion.

9. The electrostatic discharge device for a gas gun as described in claim 8, characterized in that, The diameter of the mounting portion is smaller than the diameter of the contact portion and the grounding portion, respectively, so as to form a mounting groove between the contact portion and the step portion. A spring is sleeved on the mounting groove, and the two ends of the spring contact the contact portion and the step portion, respectively, so that the grounding portion can contact the guide portion.

10. The electrostatic discharge device for a gas gun as described in claim 8, characterized in that, The contact portion has a conical structure with a cone angle of 30°.

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