A charging and discharging device suitable for a launcher inflation valve

Abstract

The present invention relates to the technical field of inflation and deflation of launcher inflation valves, and is an inflation and deflation device suitable for launcher inflation valves, comprising: a valve body, provided with a valve cavity open at the top and bottom along its axial direction; a first connection portion capable of correspondingly connecting to the launcher inflation valve at its lower end; a second connection portion provided on one side of the valve body, which is in corresponding communication with the first connection portion through the valve cavity and capable of correspondingly connecting to an air source; a main shaft, which is movably engaged in the valve cavity up and down, and the shaft body is located above the second connection portion and is sealed with the valve cavity wall. Due to the provision of the first limiting structure, the present invention can prevent staff from misoperating and causing leakage of the launcher inflation valve, thereby achieving the function of improving the safety factor; due to the provision of the second limiting structure, the position of the first limiting structure can be fixed, such as the position when the first limiting structure is in the limiting handle state and the position when the first limiting structure is in the releasing handle state.

Description

Technical Field

[0001] The present invention relates to the technical field of inflation and deflation of a launcher inflation valve, and in particular to an inflation and deflation device suitable for a launcher inflation valve. Background Art

[0002] The existing launch pad inflation valve commonly used in launch pad nitrogen cylinders or equipment has an internal structure that requires that when inflating, the valve core is pushed by gas pressure to allow gas to be filled into the cylinder or equipment. When deflation occurs, special tooling is required to lift the valve core of the launch pad inflation valve to release the internal gas.

[0003] For example, a Chinese patent with publication number CN217519296U discloses an air filling and deflation valve, which specifically discloses a shell barrel, a limit barrel, a slide barrel and a sealing cover; the limit barrel is fixed in the shell barrel by a bracket; the slide barrel is mounted on the limit barrel, and the openings of the two are facing each other to form a reset chamber, and a reset spring is provided in the reset chamber; a limit block is provided on the side wall of the limit barrel, and an L-shaped notch matching the limit block is provided on the side wall of the slide barrel; the valve has the following defects: 1. It is easy for staff to accidentally press the slide barrel, resulting in gas leakage; 2. In the event of over-inflation, the valve needs to be disconnected from the gas source before deflation can be performed (especially in the detection stage, the launch pad needs to be inflated and deflated multiple times), which makes the work cumbersome and inefficient, and is not conducive to promotion and use.

[0004] To this end, we provide an inflation and deflation device suitable for the launcher inflation valve. Summary of the Invention

[0005] The purpose of the present invention is to provide an inflation and deflation device suitable for a launcher inflation valve in order to solve the above problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A gas filling and deflation device suitable for a launcher gas filling valve, comprising:

[0008] The valve body has a valve cavity with upper and lower openings along its axial direction; a first connection portion is provided at its lower end and can be connected to the launcher inflation valve; a second connection portion is provided on one side of the valve body and is connected to the first connection portion through the valve cavity and can be connected to the gas source;

[0009] The main shaft is movably engaged in the valve cavity up and down, and its shaft body is located above the second connecting portion and is sealed with the valve cavity wall; it is used to open the launcher inflation valve;

[0010] The handle is coaxially screwed to the upper end of the valve body; it is used to drive the main shaft to move up and down;

[0011] The first limiting structure is movable along the radial direction of the handle to fit the position of the handle above the valve body, and the bottom thereof abuts against the upper end surface of the valve body; it is used to prevent the handle from moving downward by accident;

[0012] The second limiting structure is movably coupled to the handle along the axial direction of the handle and is used to limit the position of the first limiting structure;

[0013] The handle has a coaxial mounting cavity with an open lower end, and the lower section of the inner wall of the mounting cavity is coaxially screwed to the upper end of the valve body; the upper end of the main shaft extends into the mounting cavity and is fixedly connected to the mounting cavity.

[0014] Preferably, the first limiting structure includes:

[0015] The first limiting member is movably inserted into the handle along its radial direction, and has a matching portion at its bottom that contacts and matches with the upper end surface of the valve body;

[0016] a first return spring, one end of which is coaxially connected to the inner end of the first limiter, and the other end of which is correspondingly connected to the handle;

[0017] Among them, the upper end surface of the valve body is located inside the matching part and is provided with an annular groove matching the matching part; the second limiting structure cooperates with the first return spring to clamp the first limiting member.

[0018] Preferably, the second limiting structure includes:

[0019] The second limiting member has a lower end that is movably inserted into the handle along the axial direction of the handle, and its lower end is movably sleeved on the position of the first limiting member located outside the matching portion; a horizontal bending portion is provided at its upper end;

[0020] The second return spring has an upper end that abuts against the lower end surface of the horizontal bending portion, and a lower end that abuts against and fits with the handle.

[0021] Preferably, the first limiting member is provided with a first step surface and a second step surface spaced apart along its axial direction at a position outside the matching portion, which can interfere with the inner end surface of the second limiting member;

[0022] When the second position limiting member is in contact with the first step surface, the position of the matching portion corresponds to the upper end surface of the valve body; when the second position limiting member is in contact with the second step surface, the position of the matching portion corresponds to the annular groove.

[0023] Preferably, a position of the main shaft corresponding to the first limiting structure is provided with a clearance hole for the first limiting structure to pass through; a threaded hole coaxial with the first return spring is provided on the side of the handle away from the first limiting member, and the diameter of the threaded hole is larger than the outer diameter of the first return spring, and a screw that interferes with the first return spring is screwed into the threaded hole;

[0024] Wherein, the inner end of the first limiting member extends into the clearance hole.

[0025] Preferably, an annular extension is provided on the upper end of the valve body, and the annular extension is coaxially threaded with the handle; the position of the handle corresponding to the lower portion of the annular extension can cooperate with the annular extension to realize a third limit member to prevent the handle from rising.

[0026] Preferably, the first connecting portion includes:

[0027] The outer sleeve nut and the upper section of the inner cavity are sealed and rotatably connected to the lower end of the valve body, and the lower section of the inner cavity has a threaded portion that can be connected to the launcher inflation valve.

[0028] Preferably, the annular surface of the valve body and the outer sleeve nut is provided with an annular groove with a circular cross section, and the annular groove is rolling-fitted with a plurality of rolling bodies at even intervals along its axial direction.

[0029] Preferably, a radial hole matching the rolling element is provided at a position of the outer sleeve nut corresponding to the annular groove, and a sealing member is detachably connected to the cavity of the radial hole.

[0030] Preferably, the second connecting portion includes:

[0031] The inner end of the connector is correspondingly and sealingly connected to the valve body, and the inner end is correspondingly communicated with the valve cavity;

[0032] The filter disc is arranged between the inner end of the joint and the valve cavity.

[0033] The beneficial effects are:

[0034] 1. The first limiting structure can prevent staff from operating the launcher incorrectly, which may cause leakage of the launcher inflation valve, thereby improving the safety factor.

[0035] 2. Due to the provision of the second limiting structure, the position of the first limiting structure can be fixed, such as the position of the first limiting structure when it is in a state of limiting the handle and the position of the first limiting structure when it is in a state of releasing the limit handle;

[0036] 3. The valve body is used as the installation carrier, and the first connecting part, the second connecting part main shaft and the handle are installed on the valve body to form an inflation and deflation device, which solves the technical problem in the prior art that during the inflation and deflation operation of the launcher inflation valve, multiple special tooling is required to be used in conjunction, resulting in cumbersome work and low efficiency. The function of inflating and deflation operation of the launcher inflation valve is realized with only one inflation and deflation device.

[0037] Additional technical features and advantages of the present invention will be more clearly explained in the following description, or can be understood through specific practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following detailed description, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0039] Figure 1 It is a structural schematic diagram of the present invention;

[0040] Figure 2 It is a right side view of the present invention;

[0041] Figure 3 yes Figure 2 AA section view;

[0042] Figure 4 yes Figure 3 I local enlarged view;

[0043] Figure 5 This is a cross-sectional view of another state of the present invention

[0044] The following are the descriptions of the reference numerals:

[0045] 1. Valve body; 11. First connecting part; 111. Outer sleeve nut; 112. Sealing part; 12. Second connecting part; 121. Joint; 122. Filter disc; 13. Ring groove; 14. Annular extension; 2. Main shaft; 3. Handle; 31. Screw; 32. Third limiting member; 4. First limiting structure; 41. First limiting member; 411. Fitting part; 412. First step surface; 413. Second step surface; 42. First return spring; 5. Second limiting structure; 51. Second limiting member; 511. Horizontal bending part; 52. Second return spring; 6. Rolling element. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0047] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0048] Example 1, as Figure 1-5 As shown, a gas filling and deflation device suitable for a launcher gas filling valve comprises:

[0049] The valve body 1 has a valve cavity with upper and lower openings along its axial direction; a first connection portion 11 is provided at its lower end, which can be connected to the launcher inflation valve; and a second connection portion 12 is provided on one side of the valve body, which is connected to the first connection portion 11 through the valve cavity and can be connected to the gas source.

[0050] That is to say, when the launch frame is inflated, the first connection part 11 can be connected to the launch frame inflation valve accordingly, and the second connection part 12 can be connected to the gas source accordingly. At this time, the gas can enter the launch frame inflation valve through the second connection part 12, the valve cavity and the first connection part 11, and then enter the interior of the launch frame; when the launch frame is deflated, the first connection part 11 can be connected to the launch frame inflation valve accordingly, and the second connection part 12 is not connected. At this time, the gas inside the launch frame can be discharged through the launch frame inflation valve, the first connection part 11, the valve cavity and the second connection part 12.

[0051] As needed, the first connecting portion 11 includes:

[0052] The outer sleeve nut 111, the upper section of the inner cavity is sealed and rotatably connected to the lower end of the valve body 1, and the lower section of the inner cavity has a threaded portion that can be connected to the launcher inflation valve;

[0053] The annular surface of the valve body 1 and the outer sleeve nut 111 is provided with an annular groove with a circular cross section, and a plurality of rolling bodies 6 are rollingly fitted in the annular groove at uniform intervals along its axial direction;

[0054] That is to say, part of the annular groove is located on the valve body 1, and the other part is located on the inner wall of the outer nut 111, so that the outer nut 111 can only rotate and cannot move up and down;

[0055] Specifically, when in use, the outer nut 111 can be rotated so that the outer nut 111 is screwed onto the launcher inflation valve, thereby achieving corresponding connection between the inflation and deflation device and the launcher inflation valve.

[0056] Preferably, a radial hole matching the rolling element 6 is provided at a position corresponding to the annular groove of the outer sleeve nut 111, and a blocking member 112 is detachably connected to the radial hole cavity;

[0057] As needed, the blocking piece 112 can be a screw that cooperates with the radial hole thread, or it can be a block, which is fixed by a bolt perpendicular to the radial hole. That is, the bolt is arranged radially along the radial hole, and a block is provided at the position of the bolt in the radial hole cavity.

[0058] As needed, the second connecting portion 12 includes:

[0059] The inner end of the connector 121 is correspondingly sealed and connected to the valve body 1, and the inner end is correspondingly communicated with the valve cavity;

[0060] The filter 122 is arranged between the inner end of the connector 121 and the valve cavity, so as to prevent impurities from entering the valve cavity and causing blockage of the inflation and deflation device.

[0061] The main shaft 2 is movably fitted in the valve cavity, and its shaft body is located above the second connecting portion 12 and is sealed with the valve cavity wall; it is used to open the launcher inflation valve;

[0062] That is, the main shaft 2 can move up and down in the valve cavity, and there will be no air leakage at the open end of the valve cavity;

[0063] As needed, the lower end of the main shaft 2 is provided with an air passage coaxial therewith, and the upper end of the air passage is connected to the valve cavity. In other words, the main shaft 2 is provided with a radial hole at a position corresponding to the upper end of the air passage. In other words, the gas entering through the second connecting portion 12 can enter the first connecting portion 11 through the valve cavity and the air passage.

[0064] As needed, a sealing structure is provided between the main shaft 2 and the valve chamber wall, wherein the sealing structure can be provided with an annular groove on the main shaft 2 or the valve chamber wall, and a sealing ring is provided in the groove, so that the main shaft 2 and the valve chamber wall are sealed.

[0065] In order to ensure the sealing effect between the main shaft 2 and the valve cavity wall, two or more sealing structures can be provided at intervals in the upper and lower parts.

[0066] The handle 3 is coaxially screwed to the upper end of the valve body 1 and is used to drive the main shaft 2 to move up and down;

[0067] As needed, the upper end of the main shaft 2 is fixedly connected to the handle 3;

[0068] Specifically, the portion of the main shaft 2 located in the valve cavity is cylindrical, that is, the main shaft 2 can rotate in the valve cavity;

[0069] That is to say, while the handle 3 drives the main shaft 2 to rotate, since the handle 3 is screwed to the valve body 1, the handle 3 can drive the main shaft 2 to move upward or downward; specifically, when the main shaft 2 moves downward, the main shaft 2 can push the valve core of the launcher inflation valve, so that the launcher inflation valve becomes a passage, and the launcher can be inflated or deflated at this time. When the main shaft 2 moves upward, the main shaft 2 disengages from the valve core of the launcher inflation valve, and the valve core of the launcher inflation valve is reset. At this time, the launcher inflation valve becomes a closed circuit.

[0070] The first limiting structure 4 is movable along the radial direction of the handle 3 and is fitted to the position of the handle 3 above the valve body 1, with its bottom abutting against the upper end surface of the valve body 1; it is used to prevent the handle 3 from moving downward by accident;

[0071] That is to say, since the bottom of the first limiting structure 4 is in contact with the upper end surface of the valve body 1, the handle 3 cannot drive the main shaft 2 to move downward at this time. Therefore, when not in use, it can prevent the staff from accidentally turning the handle 3, causing the main shaft 2 to descend, resulting in the launch pad being deflated, thereby improving safety; when in use, the first limiting structure 4 can be pulled outward, and the handle 3 can drive the main shaft 2 to move downward, so that the launch pad inflation valve can be inflated and deflated.

[0072] The second limiting structure 5 is movably coupled to the handle 3 along the axial direction of the handle 3 and is used to limit the movement of the first limiting structure 4;

[0073] That is to say, when not in use, since the first limiting structure 4 is blocked by the second limiting structure 5, the staff cannot directly operate the first limiting structure 4, and then the handle 3 cannot drive the main shaft 2 to move downward, further improving safety;

[0074] The handle 3 has a mounting cavity coaxial with the handle 3 and open at the lower end. The lower section of the inner wall of the mounting cavity is coaxially screwed to the upper end of the valve body 1. The upper end of the main shaft 2 extends into the mounting cavity and is fixedly connected to the mounting cavity.

[0075] Since the upper end of the main shaft 2 is fixedly connected to the handle 3, when the handle 3 is rotated, the handle 3 drives the main shaft 2 to move up and down, thereby enabling the main shaft 2 to open the launcher inflation valve.

[0076] In the above structure, the valve body 1 is used as the installation carrier, and the first connecting part 11, the second connecting part 12, the main shaft 2 and the handle 3 are installed on the valve body 1 to form an inflation and deflation device, which solves the technical problem in the prior art that during the inflation and deflation operation of the launcher inflation valve, multiple special tooling is required to be used in conjunction, resulting in cumbersome work and inefficient work. The function of inflating and deflation operation of the launcher inflation valve is realized with only one inflation and deflation device.

[0077] Example 2, based on Example 1, Figure 3-5 As shown, the first limiting structure 4 includes:

[0078] The first limiting member 41 is movably inserted into the handle 3 along its radial direction, and has a fitting portion 411 at its bottom for contacting and fitting with the upper end surface of the valve body 1;

[0079] In this way, since the fitting portion 411 contacts the upper end surface of the valve body 1, the first limiter 41 cannot move downward, and thus the handle 3 cannot move downward. At this time, the handle 3 cannot rotate in the corresponding direction, thereby preventing the handle 3 from being misoperated.

[0080] A first return spring 42, one end of which is coaxially connected to the inner end of the first limiting member 41, and the other end of which is correspondingly connected to the handle 3;

[0081] The upper end surface of the valve body 1 is provided with an annular groove 13 on the inner side of the matching portion 411, which matches the matching portion 411; the second limiting structure 5 cooperates with the first return spring 42 to clamp the first limiting member 41;

[0082] In this arrangement, the first limiting member 41 can be pressed inward, and the first limiting member 41 moves, thereby making the matching portion 411 located above the annular groove 13. At this time, the matching portion 411 is no longer restricted by the upper end surface of the valve body 1. At this time, the handle 3 can be rotated and moved downward, thereby driving the first limiting member 41 and the main shaft 2 to move downward. At this time, the matching portion 411 of the first limiting member 41 enters the annular groove 13, and the main shaft 2 moves downward to open the launcher inflation valve. When the handle 3 moves downward to a certain distance, the position other than the matching portion 411 of the first limiting member 41 contacts the upper end surface of the valve body 1. At this time, the handle 3 cannot move further, and the function of limiting the position of the handle 3 and the main shaft 2 is once again realized.

[0083] Similarly, when the first limit member 41 is reset in height, the handle 3 drives it to reset. At this time, the launcher inflation valve is closed, and then the first limit member 41 is reset to a radial position relative to the handle 3 under the action of the first reset spring 42. At this time, the matching portion 411 is once again located on the upper end surface of the valve body 1, and the matching portion 411 is in conflict with the upper end surface of the valve body 1 or there is a micro gap.

[0084] As needed, the spindle 2 is provided with a clearance hole for the first limiting structure 4 to pass through at a position corresponding to the first limiting structure 4; the handle 3 is provided with a threaded hole coaxial with the first return spring 42 on the side away from the first limiting member 41, and the diameter of the threaded hole is larger than the outer diameter of the first return spring 42. The threaded hole is screwed with a screw 31 that contacts the first return spring 42.

[0085] The inner end of the first limiting member 41 extends into the clearance hole;

[0086] This makes it easy to repair or replace the first return spring 42

[0087] Example 3, based on Example 2, Figure 3-5 As shown, the second limiting structure 5 includes:

[0088] The second limiting member 51 has a lower end that is movably inserted into the handle 3 along the axial direction of the handle 3, and its lower end is movably sleeved on the position of the first limiting member 41 located outside the matching portion 411; a horizontal bending portion 511 is provided at its upper end;

[0089] The second return spring 52 has an upper end in contact with the lower end surface of the horizontal bent portion 511 and a lower end in contact with the handle 3;

[0090] In this way, the second limiting member 51 is positioned as high as possible under the action of the second return spring 52. At this time, the second limiting member 51 and the first limiting member 41 are in contact and engaged with each other, thereby preventing the first limiting member 41 from being separated from the handle.

[0091] In this arrangement, before the handle 3 is rotated to drive the main shaft 2 to descend, the first limit member 41 needs to be pushed inward and the first limit member 41 needs to be kept in a displaced state. Only then can the handle 3 be rotated to drive the main shaft 2 to descend.

[0092] Example 4, based on Example 3, Figure 3-5 As shown, the first limiting member 41 is located outside the matching portion 411 and is provided with a first step surface 412 and a second step surface 413 spaced apart along its axial direction, which can abut against the inner end surface of the second limiting member 51;

[0093] As needed, a third step surface is provided on the outer side of the second step surface 413 opposite thereto, and the third step surface can prevent the first limiting member 41 from being separated from the second limiting member 51;

[0094] When the second limiting member 51 contacts and cooperates with the first step surface 412, the position of the matching portion 411 corresponds to the upper end surface of the valve body 1; when the second limiting member 51 contacts and cooperates with the second step surface 413, the position of the matching portion 411 corresponds to the annular groove 13;

[0095] Specifically, the first step surface 412 and the second step surface 413 are both located on the lower side of the first limiting member 41, and may also be located on the peripheral side of the first limiting member 41;

[0096] That is to say, when the second limiting member 51 is in conflict with the second step surface 413 in the first limiting member 41, the matching portion 411 in the first limiting member 41 is located just above the annular groove 13, and the first limiting member 41 is restricted by the second limiting member 51. The first return spring 42 cannot make the first limiting member 41 radially return to the handle 3. At this time, the main shaft 2 can open the launcher inflation valve by rotating the handle 3. During the specific operation, the first limiting member 41 is pressed by pressing the second limiting member 51 so that the second limiting member 51 is matched with the second step surface 413 in the first limiting member 41. At this time, the first limiting member 41 is in a pressed state. At this time, the first limiting member 41 can be released and the handle 3 can be rotated so that the handle 3 drives the main shaft 2 to descend. Compared with the third embodiment, this embodiment is more convenient to operate.

[0097] When the second limit member 51 is in conflict with the first step surface 412 in the first limit member 41, the matching portion 411 in the first limit member 41 is located directly above the upper end surface of the valve body 1, and the first limit member 41 is restricted by the second limit member 51. The first return spring 42 cannot make the first limit member 41 move radially corresponding to the handle 3. At this time, the handle 3 cannot be rotated, so the main shaft 2 cannot open the launcher inflation valve.

[0098] Example 5, based on Example 1, Figure 3-5 As shown, the upper end of the valve body 1 is provided with an annular extension 14, and the annular extension 14 is coaxially screwed with the handle 3; the position of the handle 3 corresponding to the lower portion of the annular extension 14 can interfere with the annular extension 14 to implement a third limiter 32 that prevents the handle 3 from rising;

[0099] This arrangement can prevent the handle 3 from rising excessively and causing the handle 3 to separate from the valve body 1 by the third limiting member 32 interfering with the annular extension portion 14 .

[0100] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas filling and deflation device suitable for a launcher inflation valve, characterized in that: include: A valve body (1) is provided with a valve cavity opened at both the top and the bottom along its axial direction; a first connecting portion (11) capable of correspondingly connecting to a launcher inflation valve is provided at its lower end; a second connecting portion (12) is provided on one side of the valve body, which is in corresponding communication with the first connecting portion (11) through the valve cavity and capable of correspondingly connecting to an air source; The main shaft (2) is movably engaged in the valve cavity up and down, and its shaft body is located above the second connecting portion (12) and is sealed with the valve cavity wall; it is used to open the launcher inflation valve; The handle (3) is coaxially screwed to the upper end of the valve body (1); it is used to drive the main shaft (2) to move up and down; The first limiting structure (4) is movable along the radial direction of the handle (3) and is engaged with the position of the handle (3) above the valve body (1), with the bottom thereof abutting against the upper end surface of the valve body (1); and is used to prevent the handle (3) from moving downward due to erroneous operation; The second limiting structure (5) is movably coupled to the handle (3) along the axial direction of the handle (3) and is used to limit the position of the first limiting structure (4); The handle (3) has a mounting cavity coaxial with the handle and open at the lower end, and the lower section of the inner wall of the mounting cavity is coaxially screwed to the upper end of the valve body (1); the upper end of the main shaft (2) extends into the mounting cavity and is fixedly connected to the mounting cavity; The first limiting structure (4) comprises: A first limiting member (41) is movably inserted into the handle (3) along the radial direction of the handle (3), and has a matching portion (411) at its bottom that contacts and matches the upper end surface of the valve body (1); A first return spring (42), one end of which is coaxially connected to the inner end of the first limiting member (41), and the other end of which is correspondingly connected to the handle (3); The upper end surface of the valve body (1) is provided with an annular groove (13) matching the matching portion (411) at a position inside the matching portion (411); the second limiting structure (5) cooperates with the first return spring (42) to clamp the first limiting member (41); The second limiting structure (5) comprises: The second limiting member (51) has a lower end movably connected to the handle (3) along the axial direction of the handle (3), and its lower end is movably sleeved on a position of the first limiting member (41) located outside the matching portion (411); a horizontal bending portion (511) is provided at its upper end; The second return spring (52) has an upper end that abuts against the lower end surface of the horizontal bending portion (511), and a lower end that abuts against and fits into the handle (3).

2. The inflation and deflation device for a launcher inflation valve according to claim 1, characterized in that: The first limiting member (41) is located outside the matching portion (411), and is provided with a first step surface (412) and a second step surface (413) spaced apart along its axial direction, which are capable of abutting against the inner end surface of the second limiting member (51); When the second position-limiting member (51) is in contact with the first step surface (412), the position of the matching portion (411) corresponds to the upper end surface of the valve body (1); when the second position-limiting member (51) is in contact with the second step surface (413), the position of the matching portion (411) corresponds to the annular groove (13).

3. The inflation and deflation device for a launcher inflation valve according to claim 1, characterized in that: The main shaft (2) is provided with a clearance hole for the first limiting structure (4) to pass through at a position corresponding to the first limiting structure (4); the handle (3) is provided with a threaded hole coaxial with the first return spring (42) on a side away from the first limiting member (41), and the threaded hole has a diameter larger than the outer diameter of the first return spring (42), and a screw (31) is screwed into the threaded hole to engage with the first return spring (42); The inner end of the first limiting member (41) extends into the clearance hole.

4. The inflation and deflation device for a launcher inflation valve according to claim 1, characterized in that: The valve body (1) is provided with an annular extension portion (14) at the upper end thereof, and the annular extension portion (14) is coaxially screwed with the handle (3); the position of the handle (3) corresponding to the lower portion of the annular extension portion (14) can abut against the annular extension portion (14), thereby realizing a third limiting member (32) that prevents the handle (3) from rising.

5. The inflation and deflation device for a launcher inflation valve according to claim 1, characterized in that: The first connecting portion (11) comprises: The outer sleeve nut (111) has an upper inner cavity section that is sealingly rotatably connected to the lower end of the valve body (1), and the lower inner cavity section has a threaded portion that can be correspondingly connected to the launcher inflation valve.

6. The inflation and deflation device for a launcher inflation valve according to claim 5, characterized in that: The annular surface of the valve body (1) and the outer sleeve nut (111) is provided with an annular groove with a circular cross section, and the annular groove is rolling-fitted with a plurality of rolling bodies (6) at even intervals along its axial direction.

7. The inflation and deflation device for a launcher inflation valve according to claim 6, characterized in that: A radial hole matching the rolling body (6) is provided at a position of the outer sleeve nut (111) corresponding to the annular groove, and the radial hole cavity is detachably connected to a blocking piece (112).

8. The inflation and deflation device for a launcher inflation valve according to claim 1, characterized in that: The second connecting portion (12) comprises: A connector (121), the inner end of which is correspondingly sealed and connected to the valve body (1), and the inner end of which is correspondingly connected to the valve cavity; The filter disc (122) is arranged between the inner end of the connector (121) and the valve cavity.

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