Filling gun

Abstract

The utility model relates to the technical field of fluid filling, and provides a filling gun which comprises a gun body, a gun nozzle, a clamping jaw and a control valve set, the gun body is provided with an inner cavity, the inner cavity is provided with a piston and a piston rod, the piston can reciprocate in the axial direction of the gun body, the piston rod penetrates through the gun body in the axial direction and is connected to the piston, and the piston rod is provided with a filling fluid channel extending in the axial direction; the gun nozzle is elastically connected to one end of the piston rod and is connected with the filling fluid channel; the clamping jaw can be arranged at one end, close to the gun nozzle, of the gun body in an opening or closing manner; the control valve set is arranged on the gun body and used for controlling the piston to move in a reciprocating mode so that the piston rod can be switched between the first position and the second position, and at the first position, the piston rod drives the clamping jaw to be opened. In the second position, the piston rod drives the clamping jaw to close. The purposes of automatic gun loading, filling, gun unloading and the like can be achieved, the filling process can be simplified, the filling efficiency can be improved, and the beneficial effects of being simple in structure, convenient and fast to operate and the like are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of fluid filling, and in particular provides a filling gun. Background Art

[0002] Liquefied gas is used in daily life and is stored in liquefied gas cylinders. However, the current filling process of liquefied gas cylinders is relatively complicated and inefficient. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a filling gun, aiming to solve the problems existing in the prior art that the inflation and filling process of liquefied gas cylinders is relatively complicated and the efficiency is low.

[0004] To achieve the above purpose, the technical solution adopted in this application is:

[0005] The present application provides a filling gun, comprising:

[0006] The gun body is provided with an inner cavity, the inner cavity is provided with a piston and a piston rod, the piston can reciprocate along the axial direction of the gun body, the piston rod penetrates the gun body along the axial direction and is connected to the piston, and the piston rod is provided with a filling fluid channel extending along the axial direction;

[0007] A gun nozzle, elastically connected to one end of the piston rod and connected to the filling fluid channel;

[0008] A clamping claw, which can be opened or closed and is disposed at one end of the gun body adjacent to the gun mouth;

[0009] A control valve group, disposed on the gun body and used to control the reciprocating movement of the piston so that the piston rod switches between a first position and a second position;

[0010] Wherein, in the first position, the piston rod drives the clamping jaws to open,

[0011] In the second position, the piston rod drives the jaws closed.

[0012] Optionally, the piston is used to separate the inner cavity of the gun body into a first chamber and a second chamber;

[0013] The control valve group is used to transmit a driving medium into the first chamber and / or the second chamber to control the reciprocating movement of the piston.

[0014] Optionally, the other end of the gun body away from the gun nozzle is provided with a first end cover, the first end cover is provided with a driving medium main path, a first branch path and a second branch path, the driving medium main path is used to transmit the driving medium, the first branch path is connected to the first chamber, and the second branch path is connected to the second chamber;

[0015] The control valve group is arranged on the first end cover, and in the first position, the control valve group is used to control the main path of the driving medium to be connected with the first branch path;

[0016] In the second position, the control valve group is used to control the main path of the driving medium to be connected to the second branch path.

[0017] Optionally, the first end cover is further provided with a first exhaust flow path and a second exhaust flow path;

[0018] In the first position, the control valve group is also used to control the second branch to be connected to the second exhaust flow path;

[0019] In the second position, the control valve group is further used to control the first branch to be connected to the first exhaust flow path.

[0020] Optionally, the first end cover is provided with a first valve cavity, a second valve cavity, a third valve cavity, a fourth valve cavity and a fifth valve cavity side by side along the radial direction of the gun body;

[0021] The control valve group comprises:

[0022] a valve core, which passes through the first valve cavity, the second valve cavity, the third valve cavity, the fourth valve cavity and the fifth valve cavity, and can reciprocate along the radial direction of the gun body to control the on-off of each valve cavity;

[0023] In the first position, the main path of the driving medium is connected to the first branch path through the third valve cavity and the fourth valve cavity, and the second branch path is connected to the second exhaust flow path through the second valve cavity and the first valve cavity;

[0024] In the second position, the main path of the driving medium is connected to the second branch path via the third valve cavity and the second valve cavity, and the first branch path is connected to the first exhaust flow path via the fourth valve cavity and the fifth valve cavity.

[0025] Optionally, the control valve group further includes: a button;

[0026] The valve core has a first end and a second end, and the button is disposed at the first end and / or the second end of the valve core.

[0027] Optionally, the control valve group further includes:

[0028] A valve cover, wherein the first end and the second end of the valve core are both covered with the valve cover, and the valve cover is provided with a third chamber;

[0029] A valve plug, the first end and / or the second end of the valve core is connected to the button via the valve plug, and the valve plug can reciprocate in the radial direction of the gun body in the third chamber.

[0030] Optionally, at least one of the valve covers is provided with a driving medium bypass, the driving medium bypass is communicated with the third chamber, and the driving medium bypass is used to transmit the driving medium.

[0031] Optionally, a sleeve is provided at one end of the piston rod, and a sealing end cover is provided at one end of the sleeve adjacent to the piston;

[0032] The gun nozzle can move in the sleeve along the axial direction and is penetrated by the sealing end cover, the gun nozzle has a third end and a fourth end, the third end is provided with a first elastic member, the third end is connected to the filling fluid channel through the first elastic member, the side wall of the third end is provided with a first through hole, and the fourth end is provided with a filling fluid outlet;

[0033] In the first position, the inner side wall of the sealing end cover seals the first through hole;

[0034] In the second position, the inner side wall of the sealing end cover is separated from the first through hole.

[0035] Optionally, the third end of the gun nozzle is provided with a sealing component;

[0036] In the first position, the sealing component abuts against the outer surface of the sealing end cover of the sleeve;

[0037] In the second position, the sealing member is separated from the outer surface of the sealing end cap.

[0038] Optionally, a first step surface is provided in the filling fluid channel, and the first elastic member is provided between the sealing component and the first step surface.

[0039] Optionally, the gun nozzle comprises:

[0040] A first body, adapted to penetrate the sealing end cover of the sleeve, and having the third end;

[0041] A second body connected to the first body and having the fourth end;

[0042] Along the radial direction of the gun body, the width of the second body is greater than the width of the first body, so as to construct a second step surface;

[0043] In the first position, the second step surface is separated from the inner surface of the sealing end cover of the sleeve;

[0044] In the second position, the second step surface abuts against the inner surface of the sealing end cover.

[0045] Optionally, a second end cover is provided at one end of the gun body, the clamping jaw comprises a pair of chucks symmetrically distributed along the axial direction, each of the chucks has a fifth end, the fifth end of each of the chucks is rotatably connected to the second end cover, and a second elastic member is connected between the fifth ends of the pair of chucks;

[0046] The sleeve is located between the pair of chucks. In the first position, the sleeve is separated from the fifth ends of the pair of chucks, so that the pair of chucks are rotated and opened by the second elastic member.

[0047] During the process of switching from the first position to the second position, the sleeve is used to press the fifth ends of the pair of chucks outwardly so as to rotate and close the pair of chucks.

[0048] The filling gun provided in the present application can realize the purposes of automatic loading, filling and unloading of the gun, etc., can simplify the filling process, improve the filling efficiency, and has the characteristics of simple structure and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0050] Figure 1 One of the structural schematic diagrams of the filling gun provided in the embodiment of the present application;

[0051] Figure 2 The second structural schematic diagram of the filling gun provided in the embodiment of the present application;

[0052] Figure 3 for Figure 2 Sectional view at AA;

[0053] Figure 4 for Figure 3 A partial enlarged view of point B;

[0054] Figure 5 for Figure 2 Cross-sectional view at CC;

[0055] Figure 6 for Figure 5 A partial enlarged view of point D;

[0056] Figure 7The third structural diagram of the filling gun provided in the embodiment of the present application;

[0057] Figure 8 for Figure 7 EE section view;

[0058] Fig. 9 A schematic diagram of the structure of the second end cover provided in an embodiment of the present application;

[0059] Fig.10 A schematic diagram of the structure of the clamp provided in an embodiment of the present application.

[0060] Among them, the reference numerals in the figure are:

[0061] 100: gun body; 101: inner cavity; 1011: first chamber; 1012: second chamber; 102: piston; 103: piston rod; 1031: filling fluid channel; 1032: first step surface; 1033: first channel; 1034: second channel; 104: filling fluid pipeline; 105: first joint;

[0062] 106: first end cover; 1061: driving medium main path; 1062: first branch path; 1063: second branch path; 1064: first exhaust flow path; 1065: second exhaust flow path; 1066: first valve chamber;

[0063] 1067: second valve chamber; 1068: third valve chamber; 1069: fourth valve chamber; 1070: fifth valve chamber; 1071: first diaphragm; 1072: second diaphragm; 1073: third diaphragm; 1074: fourth diaphragm; 1075: fifth diaphragm; 1076: sixth diaphragm;

[0064] 107: transition channel; 108: second joint; 109: sleeve; 1091: sealing end cover;

[0065] 1092: first cylinder; 1093: second cylinder;

[0066] 110: third sealing ring; 111: buffer pad; 112: second end cover; 1121: connecting part;

[0067] 1122: first bearing portion; 1123: second bearing portion; 1124: hole; 1125: accommodating cavity;

[0068] 1126: first guide groove; 1127: second guide groove; 1128: first pin shaft hole;

[0069] 1129: second pin hole; 1130: third guide groove; 1131: fourth guide groove; 114: lifting ring; 200: gun nozzle; 201: third end; 202: fourth end; 203: first elastic member;

[0070] 204: first through hole; 205: filling fluid outlet; 206: sealing component; 2061: first sealing ring; 2062: pressing nut; 207: screw; 208: first body; 209: second body;

[0071] 210: second step surface; 211: second sealing ring;

[0072] 300: clamping claw; 301: clamping head; 302: fifth end; 303: second elastic member; 304: first pin shaft; 305: second pin shaft; 306: receiving groove; 307: kit;

[0073] 401: valve core; 4011: first end; 4012: second end;

[0074] 4013: first core; 4014: second core; 4015: third core; 4016: fourth core;

[0075] 4017: fifth core; 402: button; 403: valve cover; 4031: third chamber; 404: valve plug; 405: third connector. DETAILED DESCRIPTION

[0076] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0077] In the description of the embodiments of the present application, it needs to be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0078] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0079] In the embodiments of the present application, 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 one; 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. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0080] According to one embodiment of the present application, referring to Figure 1-Figure 10 As shown, the present application provides a filling gun, which mainly includes: a gun body 100, a gun nozzle 200, a clamping jaw 300 and a control valve group. The gun body 100 is provided with an inner cavity 101, and the inner cavity 101 is provided with a piston 102 and a piston rod 103. The piston 102 can reciprocate along the axial direction Z of the gun body 100, and the piston rod 103 axially penetrates the gun body 100 and is connected to the piston 102. The piston rod 103 is provided with a filling fluid channel 1031 extending along the axial direction, and the filling fluid channel 1031 is used to transmit the filling fluid; the nozzle 200 is elastically connected to one end of the piston rod 103 and is connected to the filling fluid channel 1031; the clamping jaw 300 can be opened or closed and is arranged at one end of the gun body 100 adjacent to the nozzle 200; the control valve group is arranged on the gun body 100, and is used to control the reciprocating movement of the piston 102 so that the piston rod 103 switches between a first position and a second position. In the first position, the piston rod 103 drives the clamping jaw 300 to open; in the second position, the piston rod 103 drives the clamping jaw 300 to close.

[0081] The filling gun provided in the embodiment of the present application is intended to optimize the filling process of pressure vessels such as liquefied gas cylinders, improve operating efficiency and simplify operating steps. Specifically:

[0082] The gun body 100 , as the basic structure of the entire filling gun, can be made of durable materials such as steel and alloy, so that it has a stable shell to withstand the pressure and mechanical stress during the filling process.

[0083] The piston 102 is disposed in the inner cavity 101 of the gun body 100 and can slide freely along the axis direction of the gun body 100. Its movement is driven by the control valve group and is a key component for realizing automatic loading, filling and unloading of the gun.

[0084] The piston rod 103 is connected to the piston 102 and axially penetrates the gun body 100. It not only serves as a transmission mechanism for the movement of the piston 102, but also has a built-in filling fluid channel 1031, which can ensure that the filling fluid such as liquefied gas can flow from the inside of the gun body 100 to the gun nozzle 200 through precise control. Such a design can simplify the overall structure and improve the integration.

[0085] The nozzle 200 is elastically connected to the front end of the piston rod 103. This design allows the nozzle 200 to have a certain adaptability when contacting the valve of a pressure container such as a liquefied gas cylinder, ensuring a tight connection. The nozzle 200 is connected to the filling fluid channel 1031 of the piston rod 103 as the final output port of the filling fluid. In addition, the elastic connection mechanism can ensure that the nozzle 200 can automatically reset after filling is completed, reducing the operation steps and improving efficiency.

[0086] The clamping jaw 300 is located at the front end of the gun body 100 near the gun nozzle 200, and can be opened or closed, which is controlled by the movement of the piston rod 103. When the piston rod 103 moves to the second position (gun filling state), the piston rod 103 drives the clamping jaw 300 to close, tightly clamping the valve of the pressure container to ensure no leakage during the filling process.

[0087] The control valve group is the core component of the whole device, which is installed on the gun body 100 and is responsible for receiving operation instructions and controlling the reciprocating motion of the piston 102. By accurately controlling the position of the piston 102, the piston rod 103 is driven to control the opening and closing of the clamping jaw 300, thereby realizing the whole process of automatic loading, filling and unloading of the gun.

[0088] The working principle of the filling gun of the present application is described below by taking the filling of a liquefied gas cylinder as an example.

[0089] When the liquefied gas cylinder needs to be inflated, the gun nozzle 200 of the filling gun is docked with the angle valve of the liquefied gas cylinder, and then the piston 102 is controlled to move forward through the control valve group to drive the piston rod 103 to move synchronously to the second position (gun loading state). At this time, the piston rod 103 drives the clamping jaws 300 to close and clamp the angle valve. At the same time, the gun nozzle 200 elastically retreats against the angle valve, and then the liquefied gas is transported into the gun nozzle 200 through the filling fluid channel 1031 of the piston rod 103, and the liquefied gas is sprayed into the liquefied gas cylinder through the angle valve through the gun nozzle 200. When the inflation is completed, the gas supply is stopped, and the piston 102 is controlled to retreat through the control valve group to drive the piston rod 103 to move synchronously to the first position (gun unloading state). At this time, the piston rod 103 drives the clamping jaws 300 to open, release the angle valve, and the gun nozzle 200 is elastically reset.

[0090] It is understandable that, although the filling of liquefied gas cylinders is taken as an example, the present application is also applicable to other liquid or gas storage pressure vessels that require high-pressure filling.

[0091] Therefore, the filling gun provided in the embodiment of the present application can achieve the purposes of automatic loading, filling and unloading of the gun, etc., can simplify the filling process, improve the filling efficiency, and has the characteristics of simple structure and convenient operation.

[0092] According to one embodiment of the present application, referring to Figure 1-Figure 3As shown, the tail end of the piston rod 103 away from the gun nozzle 200 can be externally connected to a filling fluid pipeline 104, and the end of the filling fluid pipeline 104 away from the piston rod 103 is provided with a first joint 105, and the filling fluid can be transported to the filling fluid channel 1031 of the piston rod 103 through the first joint 105 and the filling fluid pipeline 104.

[0093] According to one embodiment of the present application, referring to Figure 3 and Figure 5 As shown, the piston 102 is used to separate the inner cavity 101 of the gun body 100 into a first chamber 1011 and a second chamber 1012 ; the control valve group is used to transmit the driving medium into the first chamber 1011 and / or the second chamber 1012 to control the reciprocating movement of the piston 102 .

[0094] For example, when the control valve group transmits compressed air or other driving medium to the first chamber 1011, the pressure in the chamber increases, pushing the piston 102 to move backward (away from the direction of the gun nozzle 200). This process is also equivalent to storing energy for the forward step of the piston rod 103, because it puts the piston rod 103 in a standby state and can be quickly pushed forward once needed.

[0095] On the contrary, when the control valve group switches to transmit the driving medium to the second chamber 1012, the pressure in the second chamber 1012 increases, prompting the piston 102 to move forward, driving the piston rod 103 forward. As the piston rod 103 advances, the clamping jaws 300 close and clamp the valve of the pressure container, and at the same time, the nozzle 200 is in sealing contact with the valve of the pressure container, and the filling process of the liquefied gas begins.

[0096] For another example, the driving medium is transmitted to the first chamber 1011 and the driving medium in the second chamber 1012 is discharged at the same time, thereby pushing the piston 102 to move backward; similarly, the driving medium is transmitted to the second chamber 1012 and the driving medium in the first chamber 1011 is discharged at the same time, thereby pushing the piston 102 to move forward.

[0097] For another example, the driving medium can be transmitted to the first chamber 1011 and the second chamber 1012 at the same time. When the input amount of the first chamber 1011 is greater than the input amount of the second chamber 1012, the piston 102 can be pushed to move backward. When the input amount of the first chamber 1011 is less than the input amount of the second chamber 1012, the piston 102 can be pushed to move forward.

[0098] Therefore, the dual-chamber design of the embodiment of the present application enables the reciprocating motion of the piston 102 to be achieved through precise control of the control valve group, thereby improving the controllability and accuracy of the filling process and avoiding safety hazards or efficiency losses caused by too fast or too slow operations.

[0099] According to one embodiment of the present application, referring to Figure 5 and Figure 6 As shown, the other end of the gun body 100 away from the gun nozzle 200 is provided with a first end cover 106, and the first end cover 106 is provided with a main driving medium path 1061, a first branch 1062 and a second branch 1063. The main driving medium path 1061 is used to transmit the driving medium, the first branch 1062 is connected to the first chamber 1011, and the second branch 1063 is connected to the second chamber 1012.

[0100] The control valve group is arranged on the first end cover 106. In the first position (gun unloading state), the control valve group is used to control the main path 1061 of the driving medium to be connected with the first branch path 1062. At this time, the driving medium flows into the first chamber 1011 through the main path 1061 of the driving medium and the first branch path 1062, so that the piston 102 and the piston rod 103 retreat, and the clamp 300 opens; in the second position (gun loading and filling state), the control valve group is used to control the main path 1061 of the driving medium to be connected with the second branch path 1063. At this time, the driving medium flows into the second chamber 1012 through the main path 1061 of the driving medium and the second branch path 1063, so that the piston 102 and the piston rod 103 move forward, and the clamp 300 closes.

[0101] In this embodiment of the present application, the driving medium main circuit 1061 is a transmission channel for driving medium such as compressed air, and is the core supply line of the entire control valve group, which ensures that sufficient energy can be distributed to the chambers that need to perform actions.

[0102] The design of the first branch 1062 and the second branch 1063 realizes the flexible switching of the flow direction of the driving medium. This design allows the control valve group to control the movement of the piston 102 in two directions (forward and backward) by simply switching the path, thereby controlling the opening and closing of the clamping jaw 300. This design simplifies the overall structure and improves the reliability and response speed of the operation.

[0103] Furthermore, the control valve group and the flow channel structure are arranged on the first end cover 106, which is convenient for inspection and maintenance, thereby reducing the difficulty and cost of maintenance.

[0104] According to one embodiment of the present application, referring to Figure 8 As shown, the gun body 100 is provided with a transition channel 107 extending in the axial direction, and the two ends of the transition channel 107 are respectively connected to the first branch 1062 and the first chamber 1011. Such a design can ensure that the first branch 1062 is connected to the first chamber 1011 to facilitate the delivery of the driving medium.

[0105] According to one embodiment of the present application, referring to Figure 5 and Figure 6As shown, the first end cover 106 is further provided with a first exhaust flow path 1064 and a second exhaust flow path 1065; in the first position (unloading gun state), the control valve group is used to control the main driving medium path 1061 to be connected with the first branch path 1062, and the driving medium flows into the first chamber 1011 through the main driving medium path 1061 and the first branch path 1062. At the same time, the control valve group is also used to control the second branch path 1063 to be connected with the second exhaust flow path 1065, so that the driving medium in the second chamber 1012 is discharged through the second branch path 106 3. The second exhaust flow path 1065 is discharged outward; in the second position (gun loading state), the control valve group is used to control the driving medium main path 1061 to be connected with the second branch 1063, and the driving medium flows into the second chamber 1012 through the driving medium main path 1061 and the second branch 1063. At the same time, the control valve group is also used to control the first branch 1062 to be connected with the first exhaust flow path 1064, so that the driving medium in the first chamber 1011 is discharged outward through the first branch 1062 and the first exhaust flow path 1064.

[0106] In this embodiment of the present application, by introducing the exhaust flow path mechanism, it is ensured that the piston 102 can achieve smooth and effective movement when moving in both directions. Specifically:

[0107] During the reciprocating movement of the piston 102, the original driving medium in the chamber needs to be effectively managed to avoid generating back pressure that hinders the movement of the piston 102. The design of the first exhaust flow path 1064 and the second exhaust flow path 1065 can discharge the driving medium in the corresponding chamber when the piston 102 moves, eliminate resistance, and ensure the smooth forward or backward movement of the piston 102.

[0108] By quickly discharging the no longer needed driving medium, the chamber can reach the predetermined pressure state more quickly, speeding up the reaction time of the piston 102, making the transitions between the various steps in the filling process faster, reducing the delay between the filling and unloading actions, making the entire filling process more coherent, and significantly improving the overall efficiency of the filling operation.

[0109] Furthermore, by discharging excess driving medium in the chamber, potential safety hazards caused by over-pressurization of the chamber can be avoided.

[0110] According to one embodiment of the present application, referring to Figure 1 and Figure 2 As shown, a second joint 108 is provided on the first end cover 106 , and the second joint 108 is connected to the driving medium main path 1061 , and is used to transport a driving medium such as compressed air into the driving medium main path 1061 .

[0111] According to one embodiment of the present application, referring to Figure 5 and Figure 6As shown, the first end cover 106 is provided with a first valve cavity 1066 , a second valve cavity 1067 , a third valve cavity 1068 , a fourth valve cavity 1069 and a fifth valve cavity 1070 in parallel along the radial direction J of the gun body 100 .

[0112] The control valve group includes: a valve core 401, which runs through the first valve cavity 1066, the second valve cavity 1067, the third valve cavity 1068, the fourth valve cavity 1069 and the fifth valve cavity 1070, and can move back and forth in the radial direction to control the connection and disconnection between the valve cavities.

[0113] In the first position, the driving medium main path 1061 is connected to the first branch path 1062 via the third valve cavity 1068 and the fourth valve cavity 1069 , and the second branch path 1063 is connected to the second exhaust flow path 1065 via the second valve cavity 1067 and the first valve cavity 1066 .

[0114] In the second position, the driving medium main path 1061 is connected to the second branch path 1063 via the third valve cavity 1068 and the second valve cavity 1067 , and the first branch path 1062 is connected to the first exhaust flow path 1064 via the fourth valve cavity 1069 and the fifth valve cavity 1070 .

[0115] Specifically, in the second position (gun loading state), the control valve core 401 moves radially, so that the second valve chamber 1067 is connected to the third valve chamber 1068, and the fourth valve chamber 1069 is connected to the fifth valve chamber 1070. At this time, the driving medium flows into the second chamber 1012 through the driving medium main path 1061, the third valve chamber 1068, the second valve chamber 1067, and the second branch 1063, and the piston 102 moves forward. At the same time, the driving medium in the first chamber 1011 is discharged to the outside through the first branch 1062, the fourth valve chamber 1069, the fifth valve chamber 1070, and the first exhaust flow path 1064.

[0116] In the first position (unloading state), the control valve core 401 moves in the reverse direction, so that the first valve chamber 1066 is connected to the second valve chamber 1067, and the third valve chamber 1068 is connected to the fourth valve chamber 1069. At this time, the driving medium flows into the first chamber 1011 through the driving medium main path 1061, the third valve chamber 1068, the fourth valve chamber 1069, and the first branch 1062, and the piston 102 retreats. At the same time, the driving medium in the second chamber 1012 is discharged to the outside through the second branch 1063, the second valve chamber 1067, the first valve chamber 1066, and the second exhaust flow path 1065.

[0117] The embodiment of the present application adopts a side-by-side design of five valve chambers (the first valve chamber 1066 to the fifth valve chamber 1070) in conjunction with a radially reciprocating valve core 401, so that the control valve group can control the flow direction of the driving medium with higher precision, ensuring that the driving medium such as compressed air is accurately delivered into or discharged from the corresponding chamber, thereby improving the filling efficiency of the device.

[0118] In a specific embodiment, referring to Figure 6 As shown, six spacers are arranged side by side in the radial direction of the gun body 100 in the first end cover 106, which are respectively the first spacer 1071, the second spacer 1072, the third spacer 1073, the fourth spacer 1074, the fifth spacer 1075 and the sixth spacer 1076, and the first valve cavity 1066, the second valve cavity 1067, the third valve cavity 1068, the fourth valve cavity 1069 and the fifth valve cavity 1070 are formed in sequence between two adjacent spacers, and each spacer is provided with a second through hole with the same aperture.

[0119] The valve core 401 is radially provided with six second through holes of the spacer, and the valve core 401 includes a first core body 4013, a second core body 4014, a third core body 4015, a fourth core body 4016 and a fifth core body 4017 which are sequentially connected in the radial direction. The widths of the first core body 4013, the third core body 4015 and the fifth core body 4017 are the same as the aperture of the second through hole of the spacer, and the widths of the second core body 4014 and the fourth core body 4016 are smaller than the aperture of the second through hole.

[0120] In the second position (gun loading state), the valve core 401 is controlled to move radially, so that the first core body 4013 moves to the second through hole of the second diaphragm 1072 for sealing, and the third core body 4015 is separated from the second through hole of the third diaphragm 1073. At this time, since the width of the second core body 4014 is smaller than the aperture of the second through hole of the third diaphragm 1073, the second valve chamber 1067 and the third valve chamber 1068 can be connected; at the same time, the third core body 4015 moves to the second through hole of the fourth diaphragm 1074 for sealing, and the fifth core body 4017 is separated from the second through hole of the fifth diaphragm 1075. At this time, since the width of the fourth core body 4016 is smaller than the aperture of the second through hole of the fifth diaphragm 1075, the fourth valve chamber 1069 and the fifth valve chamber 1070 can be connected.

[0121] In the first position (gun unloading state), the control valve core 401 moves in the reverse direction, so that the first core body 4013 is separated from the second through hole of the second diaphragm 1072, and the third core body 4015 moves to the second through hole of the third diaphragm 1073 for sealing. At this time, since the width of the second core body 4014 is smaller than the aperture of the second through hole of the second diaphragm 1072, the first valve cavity 1066 and the second valve cavity 1067 can be connected; at the same time, the third core body 4015 is separated from the second through hole of the fourth diaphragm 1074, and the fifth core body 4017 moves to the second through hole of the fifth diaphragm 1075 for sealing. At this time, since the width of the fourth core body 4016 is smaller than the aperture of the second through hole of the fourth diaphragm 1074, the third valve cavity 1068 and the fourth valve cavity 1069 can be connected.

[0122] According to one embodiment of the present application, referring to Figure 5-Figure 7 As shown, the control valve group further includes: a button 402; a valve core 401 having a first end 4011 and a second end 4012, and the first end 4011 and / or the second end 4012 of the valve core 401 is provided with the button 402. Specifically, the first core body 4013 of the valve core 401 has a first end 4011, and the fifth core body 4017 of the valve core 401 has a second end 4012.

[0123] For example, a button 402 is disposed at the first end 4011 of the valve core 401. When the button 402 is pressed, the filling gun is in a gun loading and filling state. When the button 402 is pulled back, the filling gun is in a gun unloading state.

[0124] The embodiment of the present application designs the button 402, which makes it easy for the operator to control the radial movement of the valve core 401 through the button 402, thereby realizing the working state switching of the filling gun, and effectively improving the convenience of operation.

[0125] According to one embodiment of the present application, referring to Figure 5-Figure 7 As shown, the control valve group also includes: a valve cover 403 and a valve plug 404, the first end 4011 and the second end 4012 of the valve core 401 are both covered with the valve cover 403, and the valve cover 403 is provided with a third chamber 4031; the first end 4011 and / or the second end 4012 of the valve core 401 is connected to the button 402 via the valve plug 404, and the valve plug 404 can move radially back and forth in the third chamber 4031.

[0126] In this embodiment of the present application, the valve cover 403 can provide an additional isolation layer between the valve core 401 and the external environment, which helps to prevent pollutants such as dust and moisture from entering the valve core 401 and the chamber, thereby improving the cleanliness of the device and extending its service life.

[0127] By arranging valve plugs 404 at both ends of the valve core 401, it can be ensured that the movement of the valve core 401 is more precise and stable, which is conducive to improving the accuracy of the filling process.

[0128] According to an embodiment of the present application, at least one valve cover 403 is provided with a driving medium bypass, the driving medium bypass is connected to the third chamber 4031, and the driving medium bypass is used to transmit the driving medium.

[0129] Reference Figure 2 and Figure 7 As shown, the valve cover 403 is provided with a third joint 405, which is connected to the driving medium bypass. Compressed air and other driving media can be transmitted to the third chamber 4031 of the valve cover 403 through the third joint 405 and the driving medium bypass, thereby pushing the valve core 401 to move radially.

[0130] For example, compressed air can be transmitted to the third connector 405 on one of the valve covers 403, thereby driving the valve core 401 to move, controlling the main path 1061 of the driving medium to be connected to the second chamber 1012 via the second branch 1063, and moving the piston 102 forward, so that the filling gun is in a gun-loading filling state; after filling is completed, compressed air can be transmitted to the third connector 405 on the other valve cover 403, thereby driving the valve core 401 to move in the opposite direction, controlling the main path 1061 of the driving medium to be connected to the first chamber 1011 via the first branch 1062, and moving the piston 102 backward, so that the filling gun is in a gun-unloading state.

[0131] For another example, one of the buttons 402 can be pressed to drive the valve core 401 to move, thereby controlling the main path 1061 of the driving medium to be connected to the second chamber 1012 via the second branch 1063, and the piston 102 moves forward, so that the filling gun is in a gun loading and filling state; after the filling is completed, compressed air can be transmitted to the third connector 405 on the valve cover 403 on the opposite side of the button 402, thereby driving the valve core 401 to move in the opposite direction, controlling the main path 1061 of the driving medium to be connected to the first chamber 1011 via the first branch 1062, and the piston 102 moves backward, so that the filling gun is in a gun unloading state.

[0132] Therefore, the present application can provide a variety of different operating modes by designing components such as the button 402 and the third connector 405, thereby effectively improving the user experience.

[0133] According to one embodiment of the present application, referring to Figure 1 , Figure 3 and Figure 4 As shown, a sleeve 109 is provided at one end of the piston rod 103, and a sealing end cover 1091 is provided at one end of the sleeve 109 adjacent to the piston 102; the gun nozzle 200 can move axially in the sleeve 109 and is penetrated by the sealing end cover 1091, the gun nozzle 200 has a third end 201 and a fourth end 202, the third end 201 is provided with a first elastic member 203, the third end 201 is connected to the filling fluid channel 1031 of the piston rod 103 through the first elastic member 203, the side wall of the third end 201 is provided with a first through hole 204, and the fourth end 202 is provided with a filling fluid outlet 205; in the first position, the inner side wall of the sealing end cover 1091 seals the first through hole 204; in the second position, the inner side wall of the sealing end cover 1091 is separated from the first through hole 204.

[0134] Specifically, when the piston rod 103 moves forward to the second position (gun loading and filling state), the sleeve 109 is driven to move forward synchronously, and the nozzle 200 is held back by the valve of the pressure vessel. At this time, the inner wall of the sealing end cover 1091 of the sleeve 109 is misaligned with the first through hole 204, thereby opening the flow path between the filling fluid channel 1031 of the piston rod 103 and the nozzle 200, realizing automatic flow diversion, allowing the filling process to proceed smoothly, and improving the degree of automation and safety of the operation.

[0135] When the piston rod 103 retreats to the first position (gun unloading state), the sleeve 109 is driven to retreat synchronously, and the gun nozzle 200 is elastically reset. At this time, the inner wall of the sealing end cover 1091 of the sleeve 109 slides to the position of sealing the first through hole 204, thereby blocking the flow path between the filling fluid channel 1031 of the piston rod 103 and the gun nozzle 200, realizing automatic flow cut-off, avoiding leakage of the filling fluid after the filling is completed, and improving the safety level of the work site.

[0136] The embodiments of the present application can reduce the need for manual operations, such as manually closing or opening flow path valves, making the filling operation simpler and faster, reducing the burden on the operator, and also reducing the risk of accidents caused by human operational errors.

[0137] According to one embodiment of the present application, referring to Figure 4 As shown, the third end 201 of the gun nozzle 200 is provided with a sealing component 206; in a first position, the sealing component 206 abuts against the outer surface of the sealing end cover 1091 of the sleeve 109; in a second position, the sealing component 206 is separated from the outer surface of the sealing end cover 1091.

[0138] It can be understood that the sealing end cover 1091 has an outer surface and an inner surface, the outer surface is the side facing the piston 102 , and the inner surface is the side facing away from the piston 102 .

[0139] When the piston rod 103 moves forward to the second position (gun loading and filling state), the sleeve 109 is driven to move forward synchronously, and the nozzle 200 is pushed back by the valve of the pressure vessel, and the outer surface of the sealing end cover 1091 of the sleeve 109 is separated from the sealing component 206 to facilitate the flow path between the filling fluid channel 1031 of the piston rod 103 and the nozzle 200.

[0140] When the piston rod 103 retreats to the first position (gun unloading state), the sleeve 109 is driven to retreat synchronously, and the nozzle 200 moves forward and resets under the elastic force of the first elastic member 203. The outer surface of the sealing end cover 1091 of the sleeve 109 abuts against the sealing component 206. The sealing end cover 1091 of the sleeve 109 is sealed by the sealing component 206 to improve the sealing performance and prevent leakage of the filling fluid in this state, thereby improving safety.

[0141] For example, the third end 201 of the gun nozzle 200 is provided with a screw 207, and the sealing component 206 may include: a first sealing ring 2061 and a clamping nut 2062, the first sealing ring 2061 is sleeved on the screw 207, and is used to seal the outer surface of the sealing end cover 1091 of the sleeve 109; the clamping nut 2062 is threadedly connected to the screw 207 and pressed onto the first sealing ring 2061.

[0142] According to one embodiment of the present application, referring to Figure 4 As shown, a first step surface 1032 is provided in the filling fluid channel 1031 of the piston rod 103, and the first elastic member 203 is provided between the compression nut 2062 of the sealing member 206 and the first step surface 1032. The first elastic member 203 may be a compression spring.

[0143] For example, the filling fluid channel 1031 of the piston rod 103 includes a first channel 1033 and a second channel 1034 connected to each other, and the inner diameter of the second channel 1034 is larger than the inner diameter of the first channel 1033, thereby constructing a first step surface 1032, and the first elastic member 203, the sealing member 206 and other components can be arranged in the second channel 1034. Such a design optimizes the structural layout of the entire fluid channel, which is conducive to improving the compactness of the device.

[0144] According to one embodiment of the present application, referring to Figure 4 As shown, the gun nozzle 200 includes: a first body 208 and a second body 209, the first body 208 is adaptively arranged in the sealing end cover 1091 of the sleeve 109, and has a third end 201; the second body 209 is connected to the first body 208, and has a fourth end 202; along the radial direction, the width of the second body 209 is greater than the width of the first body 208, so as to construct a second step surface 210. It can be understood that the gun nozzle 200 has a hollow flow channel for conveying the filling fluid.

[0145] In the first position, the second step surface 210 is separated from the inner surface of the sealing end cover 1091 of the sleeve 109 ; in the second position, the second step surface 210 is in contact with the inner surface of the sealing end cover 1091 .

[0146] Specifically, when the piston rod 103 retreats to the first position (gun unloading state), it drives the sleeve 109 to retreat synchronously. Under the elastic force of the first elastic member 203, the gun nozzle 200 moves forward and resets, so that the second step surface 210 of the gun nozzle 200 is separated from the inner surface of the sealing end cover 1091 of the sleeve 109.

[0147] When the piston rod 103 moves forward to the second position (gun loading state), it drives the sleeve 109 to move forward synchronously, and the gun nozzle 200 is pushed back by the valve of the pressure vessel, so that the second step surface 210 of the gun nozzle 200 and the inner surface of the sealing end cover 1091 of the sleeve 109 abut against each other to achieve sealing, thereby preventing the filling fluid from leaking from the connection between the gun nozzle 200 and the sleeve 109, thereby improving safety.

[0148] Of course, in order to further improve the sealing performance, a second sealing ring 211 may be provided on the first body 208 , and the second sealing ring 211 is located between the second step surface 210 and the inner surface of the sealing end cover 1091 of the sleeve 109 .

[0149] In addition, a third sealing ring 110 may be provided at the connection between the piston rod 103 and the sleeve 109 to prevent the filling fluid from leaking from the connection between the piston rod 103 and the sleeve 109, thereby further improving safety.

[0150] It can be understood that, by cooperating between the sealing component 206 of the third end 201 of the gun nozzle 200 and the outer surface of the sealing end cover 1091 of the sleeve 109, the gun nozzle 200 can be limited when extended to prevent excessive extension; and by cooperating between the second step surface 210 of the gun nozzle 200 and the inner surface of the sealing end cover 1091 of the sleeve 109, the gun nozzle 200 can be limited when retreated to prevent excessive retreat.

[0151] This internal and external two-way limiting design not only ensures the correct position of the gun nozzle 200 in the sleeve 109, but also further enhances the stability of the gun nozzle 200 during the filling process and avoids unnecessary movement.

[0152] According to one embodiment of the present application, referring to Figure 3 As shown, buffer pads 111 are respectively provided at the left and right ends of the inner cavity 101 of the gun body 100 along the axial direction.

[0153] Specifically, when the piston 102 moves back and forth quickly in the gun body 100, especially at the moment of starting and stopping, a large impact force and vibration will be generated. The buffer pad 111 can absorb the impact energy, reduce the mechanical stress on the gun body 100, the piston 102 and other parts, and thus reduce the wear and potential damage caused by vibration and impact.

[0154] Furthermore, the shock-absorbing effect of the buffer pad 111 makes the piston 102 move more smoothly, reduces the working noise, and improves the stability of the entire filling process.

[0155] According to one embodiment of the present application, referring to Figure 1 , Figure 7 , Fig. 9 and Fig.10As shown, a second end cover 112 is provided at one end of the gun body 100, and the clamping jaw 300 includes a pair of chucks 301 symmetrically distributed along the axial direction, each chuck 301 has a fifth end 302, and the fifth end 302 of each chuck 301 is rotatably connected to the second end cover 112, and a second elastic member 303 is connected between the fifth ends 302 of a pair of chucks 301, and the second elastic member 303 can be a tension spring.

[0156] The sleeve 109 is located between the pair of chucks 301. In the first position, the sleeve 109 is separated from the fifth ends 302 of the pair of chucks 301, so that the pair of chucks 301 are rotated and opened by the second elastic member 303.

[0157] During the process of switching from the first position to the second position, the sleeve 109 is used to press the fifth ends 302 of the pair of clamps 301 outwardly so that the pair of clamps 301 rotate and close.

[0158] Specifically, when the piston rod 103 retreats to the first position (gun unloading state), it drives the sleeve 109 to retreat synchronously, away from the fifth end 302 of the chuck 301, and the second elastic member 303 is reset and compressed, prompting a pair of chucks 301 to open by rotation, so as to facilitate the insertion or removal of the pressure vessel valve.

[0159] When switching from the first position to the second position (gun loading and filling state), the piston rod 103 moves forward, the sleeve 109 gradually approaches and squeezes the fifth end 302 of the clamp 301, the second elastic member 303 begins to stretch, driving the clamp 301 to gradually rotate and close until the pressure vessel valve is completely clamped.

[0160] When in the second position (gun loading state), the fifth end 302 of the chuck 301 can be continuously squeezed by the piston rod 103 to keep the chuck 301 stably closed.

[0161] In the embodiment of the present application, the piston rod 103 can drive the clamping jaw 300 to open and close automatically, thereby reducing manual operation and improving the convenience and efficiency of operation.

[0162] In some embodiments, reference Fig. 9 and Fig.10 As shown, the second end cover 112 includes: a connecting portion 1121, a first bearing portion 1122 and a second bearing portion 1123. The connecting portion 1121 can be threadedly connected to the front end of the gun body 100, and the connecting portion 1121 is provided with a hole 1124 for the piston rod 103 to pass through.

[0163] The first bearing portion 1122 and the second bearing portion 1123 are arranged relatively to each other up and down, and have an accommodating cavity 1125 connected to the connecting portion 1121 at intervals to form a connecting channel 1124 between the first bearing portion 1122 and the second bearing portion 1123, and the accommodating cavity 1125 can accommodate components such as the piston rod 103 and the chuck 301.

[0164] A first guide groove 1126 matched with the shape of the piston rod 103 is provided at the position of the first bearing portion 1122 corresponding to the channel 1124, and a second guide groove 1127 matched with the shape of the piston rod 103 is provided at the position of the second bearing portion 1123 corresponding to the channel 1124. The first guide groove 1126 and the second guide groove 1127 are arranged opposite to each other. When the piston rod 103 is extended, it is clamped between the first guide groove 1126 and the second guide groove 1127. The movement of the piston rod 103 can be guided by the first guide groove 1126 and the second guide groove 1127.

[0165] In addition, a pair of first pin holes 1128 are provided on the first bearing portion 1122, and the pair of first pin holes 1128 are located on both radial sides of the first guide groove 1126. A pair of second pin holes 1129 are provided on the second bearing portion 1123, and the pair of second pin holes 1129 are located on both radial sides of the second guide groove 1127. The first pin holes 1128 and the second pin holes 1129 are arranged in a one-to-one correspondence to form two groups of first pin holes 1128 and second pin holes 1129; the fifth end 302 of each chuck 301 is provided with a first pin shaft 304, and the first pin shaft 304 of each chuck 301 is respectively connected to a group of first pin shaft holes 1128 and second pin shaft holes 1129, thereby realizing the rotational assembly of the chuck 301.

[0166] In addition, a pair of third guide grooves 1130 are provided on the first bearing portion 1122, and the pair of third guide grooves 1130 are located on both radial sides of the first guide groove 1126. A pair of fourth guide grooves 1131 are provided on the second bearing portion 1123, and the pair of fourth guide grooves 1131 are located on both radial sides of the second guide groove 1127, and the third guide grooves 1130 and the fourth guide grooves 1131 are arranged one by one to form two groups of third guide grooves 1130 and fourth guide grooves 1131; the fifth end 302 of each chuck 301 is provided with a second pin shaft 305, and the second pin shaft 305 of each chuck 301 is respectively connected to a group of third guide grooves 1130 and fourth guide grooves 1131, and the second elastic members 303 are respectively connected between the two ends of the pair of second pin shafts 305, and the two second elastic members 303 are respectively located at the top of the first bearing portion 1122 and the bottom of the second bearing portion 1123.

[0167] Among them, the third guide groove 1130 and the fourth guide groove 1131 can both be strip grooves extending radially. When the piston rod 103 drives the sleeve 109 to squeeze the fifth end 302 of the chuck 301 outward, the second pin shaft 305 can move radially in the corresponding guide groove, thereby improving the rotation stability of the clamp 300.

[0168] According to one embodiment of the present application, referring to Fig.10 As shown, the fifth end 302 of each chuck 301 is provided with a receiving groove 306, and the second pin shafts 305 are respectively provided with the receiving grooves 306, and each second pin shaft 305 is provided with a sleeve 307, and the sleeve 307 is located in the receiving groove 306. When the piston rod 103 drives the sleeve 109 forward, the sleeve 307 can be pressed outward, so that the chuck 301 is closed. The sleeve 307 can be cylindrical in shape.

[0169] According to one embodiment of the present application, referring to Figure 4 As shown, the sleeve 109 includes: a first cylinder 1092 and a second cylinder 1093 which are connected to each other. The first cylinder 1092 can be threadedly connected to the front end of the piston rod 103, and a third sealing ring 110 can be provided at the connection between the first cylinder 1092 and the piston rod 103. A sealing end cover 1091 is provided at one end of the first cylinder 1092 away from the second cylinder 1093. The shape of the second cylinder 1093 can be roughly conical, so as to gradually squeeze the sleeve 307 outward.

[0170] According to one embodiment of the present application, referring to Figure 1 and Figure 2 As shown, a lifting ring 114 is provided on the gun body 100. When in use, the filling gun can be lifted onto a hanger through the lifting ring 114, and then the filling operation can be performed. Such a design can improve the convenience of use.

[0171] The above are only preferred embodiments of the present application and are not intended to limit the embodiments of the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A filling gun, characterized in that: include: The gun body is provided with an inner cavity, the inner cavity is provided with a piston and a piston rod, the piston can reciprocate along the axial direction of the gun body, the piston rod penetrates the gun body along the axial direction and is connected to the piston, and the piston rod is provided with a filling fluid channel extending along the axial direction; A gun nozzle, elastically connected to one end of the piston rod and connected to the filling fluid channel; A clamping claw, which can be opened or closed and is disposed at one end of the gun body adjacent to the gun mouth; A control valve group, disposed on the gun body and used to control the reciprocating movement of the piston so that the piston rod switches between a first position and a second position; Wherein, in the first position, the piston rod drives the clamping jaws to open, In the second position, the piston rod drives the jaws closed.

2. The filling gun according to claim 1, characterized in that: The piston is used to separate the inner cavity of the gun body into a first chamber and a second chamber; The control valve group is used to transmit a driving medium into the first chamber and / or the second chamber to control the reciprocating movement of the piston.

3. The filling gun according to claim 2, characterized in that: The other end of the gun body away from the gun nozzle is provided with a first end cover, the first end cover is provided with a driving medium main path, a first branch path and a second branch path, the driving medium main path is used to transmit the driving medium, the first branch path is connected to the first chamber, and the second branch path is connected to the second chamber; The control valve group is arranged on the first end cover, and in the first position, the control valve group is used to control the main path of the driving medium to be connected with the first branch path; In the second position, the control valve group is used to control the main path of the driving medium to be connected to the second branch path.

4. The filling gun according to claim 3, characterized in that: The first end cover is also provided with a first exhaust flow path and a second exhaust flow path; In the first position, the control valve group is also used to control the second branch to be connected to the second exhaust flow path; In the second position, the control valve group is further used to control the first branch to be connected to the first exhaust flow path.

5. The filling gun according to claim 4, characterized in that: The first end cover is provided with a first valve cavity, a second valve cavity, a third valve cavity, a fourth valve cavity and a fifth valve cavity side by side along the radial direction of the gun body; The control valve group comprises: a valve core, which passes through the first valve cavity, the second valve cavity, the third valve cavity, the fourth valve cavity and the fifth valve cavity, and can reciprocate along the radial direction of the gun body to control the on-off of each valve cavity; In the first position, the main path of the driving medium is connected to the first branch path through the third valve cavity and the fourth valve cavity, and the second branch path is connected to the second exhaust flow path through the second valve cavity and the first valve cavity; In the second position, the main path of the driving medium is connected to the second branch path via the third valve cavity and the second valve cavity, and the first branch path is connected to the first exhaust flow path via the fourth valve cavity and the fifth valve cavity.

6. The filling gun according to claim 5, characterized in that: The control valve group further includes: a button; The valve core has a first end and a second end, and the button is disposed at the first end and / or the second end of the valve core.

7. The filling gun according to claim 6, characterized in that: The control valve group also includes: A valve cover, wherein the first end and the second end of the valve core are both covered with the valve cover, and the valve cover is provided with a third chamber; A valve plug, the first end and / or the second end of the valve core is connected to the button via the valve plug, and the valve plug can reciprocate in the radial direction of the gun body in the third chamber.

8. The filling gun according to claim 7, characterized in that: At least one of the valve covers is provided with a driving medium bypass, the driving medium bypass is communicated with the third chamber, and the driving medium bypass is used to transmit the driving medium.

9. The filling gun according to any one of claims 1 to 8, characterized in that: A sleeve is provided at one end of the piston rod, and a sealing end cover is provided at one end of the sleeve adjacent to the piston; The gun nozzle can move in the sleeve along the axial direction and is penetrated by the sealing end cover, the gun nozzle has a third end and a fourth end, the third end is provided with a first elastic member, the third end is connected to the filling fluid channel through the first elastic member, the side wall of the third end is provided with a first through hole, and the fourth end is provided with a filling fluid outlet; In the first position, the inner side wall of the sealing end cover seals the first through hole; In the second position, the inner side wall of the sealing end cover is separated from the first through hole.

10. The filling gun according to claim 9, characterized in that: The third end of the gun nozzle is provided with a sealing component; In the first position, the sealing component abuts against the outer surface of the sealing end cover of the sleeve; In the second position, the sealing member is separated from the outer surface of the sealing end cap.

11. The filling gun according to claim 10, characterized in that: A first step surface is provided in the filling fluid channel, and the first elastic member is provided between the sealing component and the first step surface.

12. The filling gun according to claim 9, characterized in that: The gun nozzle comprises: A first body, adapted to penetrate the sealing end cover of the sleeve, and having the third end; A second body connected to the first body and having the fourth end; Along the radial direction of the gun body, the width of the second body is greater than the width of the first body, so as to construct a second step surface; In the first position, the second step surface is separated from the inner surface of the sealing end cover of the sleeve; In the second position, the second step surface abuts against the inner surface of the sealing end cover.

13. The filling gun according to claim 9, characterized in that: A second end cover is provided at one end of the gun body, the clamping jaw comprises a pair of chucks symmetrically distributed along the axial direction, each of the chucks has a fifth end, the fifth end of each of the chucks is rotatably connected to the second end cover, and a second elastic member is connected between the fifth ends of the pair of chucks; The sleeve is located between the pair of chucks. In the first position, the sleeve is separated from the fifth ends of the pair of chucks, so that the pair of chucks are rotated and opened by the second elastic member. During the process of switching from the first position to the second position, the sleeve is used to press the fifth ends of the pair of chucks outwardly so as to rotate and close the pair of chucks.

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