Gas circuit reversing system

Abstract

The invention relates to the technical field of vacuum valves, and discloses a gas circuit reversing system which comprises a valve body, a mechanical trigger reversing mechanism and a pneumatic trigger reversing mechanism, the valve body is provided with a gas inlet gas circuit, two gas outlet gas circuits and two mounting grooves, and the mechanical trigger reversing mechanism and the pneumatic trigger reversing mechanism are mounted in the two mounting grooves respectively. The upper portion of the mechanical trigger reversing mechanism is communicated with the upper portion of the pneumatic trigger reversing mechanism through a first gas circuit, the lower portion of the mechanical trigger reversing mechanism is communicated with the lower portion of the pneumatic trigger reversing mechanism through a second gas circuit, and the gas inlet gas circuit is communicated with the second gas circuit. The two air outlet paths are communicated with the mechanical trigger reversing mechanism and the pneumatic trigger reversing mechanism in a one-to-one correspondence mode. The mechanical trigger reversing mechanism and the pneumatic trigger reversing mechanism have the one-way conduction function, the pneumatic trigger reversing mechanism can be automatically triggered only by manually triggering the mechanical trigger reversing mechanism, and two-way reversing is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum valves, in particular to a gas path reversing system. Background Art

[0002] As a key control unit in industrial automation systems, the reliability of the gas circuit reversing mechanism directly affects the operating efficiency of the equipment. The gas circuit reversing mechanism is often used in equipment such as pneumatic valves, and can be used to switch the gas circuit structure inside the valve to drive the valve to open and close. The mechanically triggered reversing mechanism has application advantages in special scenarios such as explosion-proof and high temperature because it does not require electrical intervention. Compared with electromagnetic triggering, the mechanically triggered reversing mechanism has higher stability and reliability, and can be used inside the valve without connecting to any circuit.

[0003] However, the current mechanically triggered gas path reversing mechanism still has the following problems: Most of the current mechanically triggered reversing mechanisms simply push the valve stem directly to conduct the gas path between the valve bodies, and do not have a one-way conduction function. When used in certain scenarios where backflow is not allowed, they cannot effectively prevent gas path backflow. In addition, if there are multiple mechanically triggered reversing mechanisms, if you want to achieve multi-way reversing, the operator needs to manually trigger each mechanically triggered reversing mechanism, and the triggering process is time-consuming and laborious. Summary of the invention

[0004] To solve the above problems, the technical solution adopted by the present invention is: A gas path reversing system comprises a valve body, a mechanically triggered reversing mechanism and a pneumatically triggered reversing mechanism, the valve body being provided with an air inlet path, two air outlet paths and two mounting grooves, the mechanically triggered reversing mechanism and the pneumatically triggered reversing mechanism being respectively mounted in the two mounting grooves, the upper portion of the mechanically triggered reversing mechanism being connected with the upper portion of the pneumatically triggered reversing mechanism via a first gas path, the lower portion of the mechanically triggered reversing mechanism being connected with the lower portion of the pneumatically triggered reversing mechanism via a second gas path, the air inlet path being connected with the second gas path, and the two air outlet paths being respectively connected with the mechanically triggered reversing mechanism and the pneumatically triggered reversing mechanism in a one-to-one correspondence.

[0005] Furthermore, the mounting groove is a stepped groove, the diameter of the upper portion of the mounting groove is greater than the diameter of the lower portion, the first gas path connects the upper portions of the two mounting grooves, and the second gas path connects the lower portions of the two mounting grooves.

[0006] Further, the mechanical trigger reversing mechanism comprises a sealing portion arranged at the lower part of the mounting groove and a pressing portion at the upper part, the sealing portion comprises a spring seat, a first sealing seat, a first base and a first sealing rod, the first base and the first sealing seat are sequentially sleeved in the lower part of the mounting groove from bottom to top, the spring seat is arranged on the stepped surface of the mounting groove, and the lower end surface of the spring seat is fitted with the upper end surface of the first sealing seat, the first sealing rod is slidably fitted with the first base, and the first sealing rod is coaxial with the first base, the upper part of the first sealing rod is fitted with the lower end surface of the first sealing seat, and the lower part of the first sealing rod is provided with a first sealing spring, one end of the first sealing spring is fitted with the lower part of the first sealing rod, and the other end is fitted with the first base; The pressing part includes a first upper sealing cover, a through-hole seat, a first trigger rod and a trigger spring. The first upper sealing cover and the through-hole seat are sequentially sleeved on the upper part of the mounting groove from top to bottom. The first trigger rod sequentially penetrates the first upper sealing cover and the through-hole seat and is slidably adapted with the first upper sealing cover and the through-hole seat. The first trigger rod is coaxial with the first sealing rod and is located above the first sealing rod. The trigger spring is sleeved on the first trigger rod, one end of the trigger spring is in contact with the through-hole seat, and the other end is in contact with the spring seat.

[0007] Furthermore, sealing members are provided between the side wall of the first sealing seat and the inner wall of the mounting groove, the outer wall of the first upper sealing cover, the inner wall of the first upper sealing cover and the upper part of the first sealing rod.

[0008] Furthermore, an air outlet path communicated with the mechanical trigger reversing mechanism is located between the spring seat and the via seat.

[0009] Further, the pneumatic trigger reversing mechanism comprises a sealing portion arranged at the lower part of the mounting groove and a pressing portion at the upper part, the sealing portion comprises a second sealing seat, a second base and a second sealing rod, the second base and the second sealing seat are sequentially sleeved in the lower part of the mounting groove from bottom to top, the second sealing rod is slidably adapted to the second base, and the second sealing rod is coaxial with the second base, the upper part of the second sealing rod is adapted to the lower end surface of the second sealing seat, the lower part of the second sealing rod is provided with a second sealing spring, one end of the second sealing spring is connected to the lower part of the second sealing rod, and the other end is connected to the second base; The pressing part includes a pneumatic cylinder, a second upper sealing cover and a second trigger rod. The pneumatic cylinder and the second upper sealing cover are sequentially sleeved on the upper part of the mounting groove from bottom to top, and the lower end surface of the pneumatic cylinder is in contact with the upper end surface of the second sealing seat. The second trigger rod is slidably adapted inside the pneumatic cylinder, and a cavity is formed between the upper end surface of the second trigger rod and the upper end surface of the second upper sealing cover, and the cavity is connected to the first air path. The lower end of the second trigger rod extends to the top of the second sealing rod and is adapted to the second sealing rod.

[0010] Furthermore, the outer wall of the second sealing seat, the outer wall of the second trigger rod, the outer wall of the pneumatic cylinder, the outer wall of the second upper sealing cover and the upper part of the second sealing rod are all provided with sealing members.

[0011] Furthermore, an air outlet path communicated with the pneumatic trigger reversing mechanism is arranged between the pneumatic cylinder and the second sealing seat.

[0012] Furthermore, the second upper sealing cover is provided with a vent hole, and the vent hole is communicated with the first air path.

[0013] Beneficial effects of the present invention: The mechanical trigger reversing mechanism controls the connection between the corresponding outlet gas path and the inlet gas path by manual triggering; when the outlet gas path corresponding to the mechanical trigger reversing mechanism is connected with the inlet gas path, the gas passes through the first gas path and the second gas path to realize the automatic triggering of the pneumatic trigger reversing mechanism, and then the outlet gas path corresponding to the pneumatic trigger reversing mechanism is automatically connected with the inlet gas path. By triggering a mechanical trigger reversing mechanism, the dual-path reversing of the gas path structure can be realized.

[0014] Under the action of the thrust of the first sealing spring and the upward thrust of the first sealing rod by the high-pressure gas in the second gas path, it is ensured that the first sealing rod will not be pushed downward by the gas at the upper part of the mounting groove, thereby realizing the unidirectional conduction function of the mechanically triggered reversing mechanism; under the action of the gas thrust and the second sealing spring, the unidirectional conduction function of the pneumatically triggered reversing mechanism is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the invention.

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a front cross-sectional view of the present invention; Figure 3 for Figure 1 AA view; Figure 4 for Figure 1 BB view; Figure 5 It is an exploded diagram of the mechanical trigger reversing mechanism; Figure 6It is an exploded diagram of the pneumatic trigger reversing mechanism; Figure 7 is a structural schematic diagram of a first sealing seat and a first sealing rod; Figure 8 It is a schematic diagram of the structure of the pneumatic cylinder.

[0018] In the figure: 1. valve body; 101. air inlet path; 102. air outlet path; 103. mounting groove; 2. mechanical trigger reversing mechanism; 201. spring seat; 202. first sealing seat; 203. first base; 204. first sealing rod; 205. first sealing spring; 206. first upper sealing cover; 207. through-hole seat; 208. first trigger rod; 209. trigger spring; 3. pneumatic trigger reversing mechanism; 301. second sealing seat; 302. second base; 303. second sealing rod; 304. second sealing spring; 305. pneumatic cylinder; 306. second upper sealing cover; 307. second trigger rod; 308. vent; 4. sealing member; 5. first air path; 6. second air path. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0020] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] like Figure 1-Figure 8As shown, an air path reversing system includes a valve body 1, a mechanically triggered reversing mechanism 2 and a pneumatically triggered reversing mechanism 3, the valve body 1 is provided with an air inlet path 101, two air outlet paths 102 and two mounting grooves 103, the mechanically triggered reversing mechanism 2 and the pneumatically triggered reversing mechanism 3 are respectively mounted in the two mounting grooves 103, the upper part of the mechanically triggered reversing mechanism 2 is connected with the upper part of the pneumatically triggered reversing mechanism 3 through a first air path 5, the lower part of the mechanically triggered reversing mechanism 2 is connected with the lower part of the pneumatically triggered reversing mechanism 3 through a second air path 6, the air inlet path 101 is connected with the second air path 6, and the two air outlet paths 102 are respectively connected with the mechanically triggered reversing mechanism 2 and the pneumatically triggered reversing mechanism 3 in a one-to-one correspondence.

[0022] The two outlet gas paths 102 are used for the reversing of the gas path structure. The mechanical trigger reversing mechanism 2 and the pneumatic trigger reversing mechanism 3 are both used to control whether the corresponding outlet gas paths 102 are connected to the inlet gas path 101. When the inlet gas path 101 is connected to the outlet gas path 102 corresponding to the mechanical trigger reversing mechanism 2, the reversing of the gas path structure can be realized. When the inlet gas path 101 is connected to both outlet gas paths 102, the dual-path reversing of the gas path structure can be realized. Among them, the mechanical trigger reversing mechanism 2 controls the connection between the corresponding outlet gas path 102 and the inlet gas path 101 by manual triggering; when the outlet gas path 102 corresponding to the mechanical trigger reversing mechanism 2 is connected to the inlet gas path 101, the gas is then automatically triggered by the first gas path 5 and the second gas path 6 to realize the pneumatic trigger reversing mechanism 3, and then the outlet gas path 102 corresponding to the pneumatic trigger reversing mechanism 3 is automatically connected to the inlet gas path 101. The dual-path reversing of the gas path structure can be achieved by triggering a mechanical trigger reversing mechanism 2 .

[0023] Specifically, the mounting groove 103 is a stepped groove, the upper part of the mounting groove 103 is used to install the upper part of the mechanical trigger reversing mechanism 2 or the upper part of the pneumatic trigger reversing mechanism 3, and the lower part of the mounting groove 103 is used to install the lower part of the mechanical trigger reversing mechanism 2 or the lower part of the pneumatic trigger reversing mechanism 3; when the mechanical trigger reversing mechanism 2 and the pneumatic trigger reversing mechanism 3 are installed in the mounting groove 103, the mechanical trigger reversing mechanism 2 and the pneumatic trigger reversing mechanism 3 are installed in sequence from bottom to top in the mounting groove 103, so the diameter of the upper part of the mounting groove 103 is larger than the diameter of the lower part, which is convenient for the installation of the mechanical trigger reversing mechanism 2 and the pneumatic trigger reversing mechanism 3, the first air path 5 connects the upper parts of the two mounting grooves 103 to connect the upper part of the mechanical trigger reversing mechanism 2 with the upper part of the pneumatic trigger reversing mechanism 3, and the second air path 6 connects the lower parts of the two mounting grooves 103 to connect the lower part of the mechanical trigger reversing mechanism 2 with the lower part of the pneumatic trigger reversing mechanism 3.

[0024] Specifically, the mechanical trigger reversing mechanism 2 includes a sealing portion arranged at the lower part of the mounting groove 103 and a pressing portion at the upper part, wherein the sealing portion includes a spring seat 201, a first sealing seat 202, a first base 203 and a first sealing rod 204, and the first base 203 and the first sealing seat 202 are sequentially sleeved in the lower part of the mounting groove 103 from bottom to top. Figure 5 As shown, the first base 203 is a cylindrical frame, which is arranged at the lower part of the mounting groove 103 to play an overall supporting role, and gaps are left on the side and bottom of the first base 203, and the gaps are used to connect the second gas path 6 with the lower part of the mounting groove 103, so that the gas in the second gas path 6 can flow to the lower part of the mounting groove 103.

[0025] The spring seat 201 is arranged on the stepped surface of the mounting groove 103, and the lower end surface of the spring seat 201 is fitted with the upper end surface of the first sealing seat 202, the first sealing rod 204 is slidably fitted with the first base 203, and the first sealing rod 204 is coaxial with the first base 203, the upper part of the first sealing rod 204 is fitted with the lower end surface of the first sealing seat 202, and the lower part of the first sealing rod 204 is provided with a first sealing spring 205, one end of the first sealing spring 205 is fitted with the lower part of the first sealing rod 204, and the other end is fitted with the first base 203.

[0026] The upper edge of the first sealing rod 204 is an inclined surface, and the lower end surface of the first sealing seat 202 is a sealing surface of an "eight"-shaped opening. The inclined surface of the upper part of the first sealing rod 204 can fit tightly in the "eight"-shaped opening to achieve the sealing effect of the first sealing rod 204, and the inclined angle of the inclined surface is 10°-20°. During the sealing process of the first sealing rod 204, setting the inclined angle to 10°-20° can not only meet the sealing requirements, but also disperse the local stress on the sealing surface, avoid deformation or damage of the sealing surface due to pressure concentration, and improve the service life. In addition, a sealing member 4 is sleeved on the inclined surface of the upper part of the first sealing rod 204. The sealing member 4 is preferably an O-ring, which can fit tightly to the sealing surface through elastic deformation to form a physical isolation layer, effectively blocking gas leakage to achieve a sealing effect.

[0027] The cross-sectional shape of the first base 203 is a "mountain" shape, that is, a vertical protruding rod is provided at the axis center of the first base 203, and the diameter of the protruding rod is the same as the inner diameter of the first sealing spring 205, that is to say, the lower part of the first sealing spring 205 can be mounted on the protruding rod, and the first sealing spring 205 is fixed to the first base 203 by the protruding rod, thereby ensuring the stability of the first sealing spring 205 and preventing the lower part of the first sealing spring 205 from shaking left and right when the first sealing rod 204 slides up and down, thereby affecting the normal movement of the first sealing rod 204.

[0028] The pressing part of the mechanical trigger reversing mechanism 2 includes a first upper sealing cover 206 , a through hole seat 207 , a first trigger rod 208 and a trigger spring 209 . The first upper sealing cover 206 and the through hole seat 207 are sequentially sleeved on the upper part of the mounting groove 103 from top to bottom.

[0029] The first upper sealing cover 206 can be fixedly installed at the notch of the mounting groove 103 by means of screws. A sealing member 4 is provided on the outer wall of the first upper sealing cover 206 . The sealing member 4 is used to seal the mounting groove 103 to ensure the sealing between the first upper sealing cover 206 and the mounting groove 103 .

[0030] The first trigger rod 208 passes through the first upper sealing cover 206 and the through-hole seat 207 in sequence, and is slidably adapted with the first upper sealing cover 206 and the through-hole seat 207. The first trigger rod 208 is coaxial with the first sealing rod 204 and is located above the first sealing rod 204. The trigger spring 209 is sleeved on the first trigger rod 208, and one end of the trigger spring 209 is in contact with the through-hole seat 207, and the other end is in contact with the spring seat 201.

[0031] like Figure 2 , Figure 3 and Figure 5 As shown, the lower end surface of the through hole seat 207 is provided with a guide installation groove, and the upper end of the trigger spring 209 is located in the guide installation groove. The stability of the upper end of the trigger spring 209 is ensured by the guide installation groove. The upper end surface of the spring seat 201 is provided with a clamping groove, and the lower end of the trigger spring 209 is located in the clamping groove. The stability of the lower end of the trigger spring 209 is ensured by the clamping groove. In addition, the first trigger rod 208 is also located in the guide installation groove, as shown in FIG. Figure 2 and Figure 5 As shown, the side of the first trigger rod 208 is provided with a convex edge that fits with the guide installation groove. When the first trigger rod 208 slides up and down in the through-hole seat 207, the convex edge can guide the up and down movement of the first trigger rod 208. A sealing member 4 is provided on the inner wall of the first upper sealing cover 206. When the first trigger rod 208 moves up and down in the first upper sealing cover 206, the sealing member 4 ensures the airtightness of the first upper sealing cover 206.

[0032] Specifically, the pneumatic trigger reversing mechanism 3 includes a sealing portion arranged at the lower part of the mounting groove 103 and a pressing portion at the upper part, the sealing portion includes a second sealing seat 301, a second base 302 and a second sealing rod 303, the second base 302 and the second sealing seat 301 are sequentially sleeved in the lower part of the mounting groove 103 from bottom to top, the second sealing rod 303 is slidably adapted to the second base 302, and the second sealing rod 303 is coaxial with the second base 302, the upper part of the second sealing rod 303 is adapted to the lower end surface of the second sealing seat 301, and the lower part of the second sealing rod 303 is provided with a second sealing spring 304, one end of the second sealing spring 304 is connected to the lower part of the second sealing rod 303, and the other end is connected to the second base 302; The specific structure and installation method of the second sealing seat 301, the second base 302, the second sealing rod 303 and the second sealing spring 304 are the same as those of the first sealing seat 202, the first base 203, the first sealing rod 204 and the first sealing spring 205, wherein the gap on the second base 302 is used to connect the second gas path 6 with the lower part of the mounting groove 103, so that the gas in the second gas path 6 can flow to the lower part of the mounting groove 103.

[0033] Specifically, the pressing part of the pneumatic trigger reversing mechanism 3 includes a pneumatic cylinder 305, a second upper sealing cover 306 and a second trigger rod 307. The pneumatic cylinder 305 and the second upper sealing cover 306 are sequentially sleeved on the upper part of the mounting groove 103 from bottom to top, and the lower end surface of the pneumatic cylinder 305 is in contact with the upper end surface of the second sealing seat 301, and the pneumatic cylinder 305 plays a supporting role. The second trigger rod 307 is slidably adapted inside the pneumatic cylinder 305, and a cavity is formed between the upper end surface of the second trigger rod 307 and the upper end surface of the second upper sealing cover 306. The cavity is connected to the first air path 5 through the vent hole 308 provided on the second upper sealing cover 306. The lower end of the second trigger rod 307 extends to the upper side of the second sealing rod 303 and is adapted to the second sealing rod 303.

[0034] Specifically, the outer wall of the second sealing seat 301 , the outer wall of the second trigger rod 307 , the outer wall of the pneumatic cylinder 305 , the outer wall of the second upper sealing cover 306 and the upper part of the second sealing rod 303 are all provided with sealing members 4 .

[0035] Specifically, the air outlet path 102 communicated with the pneumatic trigger reversing mechanism 3 is arranged between the pneumatic cylinder 305 and the second sealing seat 301 .

[0036] Working principle of the present invention: When reversing is not required, the upper end of the first sealing rod 204 fits in with the lower end surface of the first sealing seat 202, and the gas in the intake air path 101 cannot flow into the upper part of the mounting groove 103 for mounting the mechanical trigger reversing mechanism 2 through the second air path 6. At this time, the first sealing spring 205 is in a slightly compressed state, which will generate an upward thrust on the first sealing rod 204. Under the thrust of the first sealing spring 205 and the upward thrust of the high-pressure gas in the second air path 6 on the first sealing rod 204, it is ensured that the first sealing rod 204 will not be pushed downward by the gas in the upper part of the mounting groove 103, so as to realize mechanical trigger reversing. The one-way conduction function of the mechanism 2; the upper end of the second sealing rod 303 is adapted to fit with the lower end surface of the second sealing seat 301, and the gas in the intake air path 101 cannot flow into the upper part of the mounting groove 103 for mounting the pneumatic trigger reversing mechanism 3 through the second air path 6. At this time, the second sealing spring 304 is in a slightly stretched state, and the second sealing spring 304 generates a downward pulling force on the second sealing rod 303, which is slightly smaller than the upward thrust of the high-pressure gas in the second air path 6 on the second sealing rod 303. Under the action of the gas thrust and the second sealing spring 304, the one-way conduction function of the pneumatic trigger reversing mechanism 3 is realized.

[0037] When reversing is required, the first trigger rod 208 is pressed downward, the first trigger rod 208 slides downward, and squeezes the first sealing rod 204 to move downward, so that the upper end surface of the first sealing rod 204 is no longer in contact with the upper end surface of the first sealing seat 202. At this time, the high-pressure gas in the second gas path 6 flows into the upper part of the mounting groove 103 for installing the mechanical trigger reversing mechanism 2, and a part of the high-pressure gas flows out from the gas outlet gas path 102 between the spring seat 201 and the through-hole seat 207 to achieve the reversing of the gas path; another part of the high-pressure gas flows into the upper part of the mounting groove 103 for installing the pneumatic trigger reversing mechanism 3 through the first gas path 5, and the high-pressure gas The second trigger rod 307 generates a downward thrust and pushes the second trigger rod 307 to move downward and squeeze the second sealing rod 303. At this time, since part of the high-pressure gas in the second gas path 6 flows to the upper part of the mounting groove 103 through the first gas path 5, the upward thrust of the high-pressure gas in the second gas path 6 on the second sealing rod 303 is reduced, and the second sealing rod 303 moves downward, and the upper end face thereof is no longer in contact with the upper end face of the second sealing seat 301. At this time, the high-pressure gas in the second gas path 6 flows into the mounting groove 103 and flows out from the gas outlet path 102 between the pneumatic cylinder 305 and the second sealing seat 301, thereby realizing the reversal of the gas path.

[0038] The present invention can realize the simultaneous reversing of the dual-path gas path by controlling a mechanical trigger reversing mechanism 2. In addition, when reversing is not required, the unidirectional conduction of the reversing mechanism can be realized by the first sealing spring 205 and the second sealing spring 304.

[0039] Unless otherwise defined, in the embodiments of the present disclosure and the accompanying drawings, the same reference numerals represent the same meanings.

[0040] In the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are involved, and other structures can refer to the general design.

[0041] For the sake of clarity, in the accompanying drawings used to describe the embodiments of the present disclosure, parts or regions are enlarged. It is understood that when an element is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element, or there may be intermediate elements.

[0042] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A gas path reversing system, characterized in that: The invention comprises a valve body (1), a mechanical trigger reversing mechanism (2) and a pneumatic trigger reversing mechanism (3); the valve body (1) is provided with an air inlet path (101), two air outlet paths (102) and two mounting grooves (103); the mechanical trigger reversing mechanism (2) and the pneumatic trigger reversing mechanism (3) are respectively mounted in the two mounting grooves (103); the upper part of the mechanical trigger reversing mechanism (2) is connected to the upper part of the pneumatic trigger reversing mechanism (3) via a first air path (5); the lower part of the mechanical trigger reversing mechanism (2) is connected to the lower part of the pneumatic trigger reversing mechanism (3) via a second air path (6); the air inlet path (101) is connected to the second air path (6); and the two air outlet paths (102) are respectively connected to the mechanical trigger reversing mechanism (2) and the pneumatic trigger reversing mechanism (3) in a one-to-one correspondence.

2. A gas path reversing system according to claim 1, characterized in that: The mounting groove (103) is a stepped groove, the diameter of the upper portion of the mounting groove (103) is larger than the diameter of the lower portion, the first gas path (5) connects the upper portions of the two mounting grooves (103), and the second gas path (6) connects the lower portions of the two mounting grooves (103).

3. A gas path reversing system according to claim 2, characterized in that: The mechanical trigger reversing mechanism (2) comprises a sealing portion arranged at the bottom of the mounting groove (103) and a pressing portion at the top, the sealing portion comprising a spring seat (201), a first sealing seat (202), a first base (203) and a first sealing rod (204), the first base (203) and the first sealing seat (202) being sequentially sleeved in the bottom of the mounting groove (103) from bottom to top, the spring seat (201) being arranged on the stepped surface of the mounting groove (103), and the lower end surface of the spring seat (201) being in contact with the first sealing rod (204). The upper end surface of the sealing seat (202) is fitted, the first sealing rod (204) is slidably fitted with the first base (203), and the first sealing rod (204) and the first base (203) are coaxial, the upper part of the first sealing rod (204) is fitted with the lower end surface of the first sealing seat (202), and the lower part of the first sealing rod (204) is provided with a first sealing spring (205), one end of the first sealing spring (205) is fitted with the lower part of the first sealing rod (204), and the other end is fitted with the first base (203); The pressing portion comprises a first upper sealing cover (206), a through-hole seat (207), a first trigger rod (208) and a trigger spring (209); the first upper sealing cover (206) and the through-hole seat (207) are sequentially sleeved on the upper part of the mounting groove (103) from top to bottom; the first trigger rod (208) passes through the first upper sealing cover (206) and the through-hole seat (207) in sequence and is slidably fitted with the first upper sealing cover (206) and the through-hole seat (207); the first trigger rod (208) is coaxial with the first sealing rod (204) and is located above the first sealing rod (204); the trigger spring (209) is sleeved on the first trigger rod (208); one end of the trigger spring (209) is fitted with the through-hole seat (207), and the other end is fitted with the spring seat (201).

4. A gas path reversing system according to claim 3, characterized in that: A sealing member (4) is provided between the side wall of the first sealing seat (202) and the inner wall of the mounting groove (103), the outer wall of the first upper sealing cover (206), the inner wall of the first upper sealing cover (206), and the upper part of the first sealing rod (204).

5. The gas path reversing system according to claim 4, characterized in that: An air outlet path (102) connected to the mechanical trigger reversing mechanism (2) is located between the spring seat (201) and the through-hole seat (207).

6. The gas path reversing system according to claim 2, characterized in that: The pneumatic trigger reversing mechanism (3) comprises a sealing portion arranged at the lower part of the mounting groove (103) and a pressing portion at the upper part, the sealing portion comprising a second sealing seat (301), a second base (302) and a second sealing rod (303), the second base (302) and the second sealing seat (301) are sequentially sleeved in the lower part of the mounting groove (103) from bottom to top, the second sealing rod (303) is slidably matched with the second base (302), and the second sealing rod (303) and the second base (302) are coaxial, the upper part of the second sealing rod (303) is matched with the lower end surface of the second sealing seat (301), and the lower part of the second sealing rod (303) is provided with a second sealing spring (304), one end of the second sealing spring (304) is connected to the lower part of the second sealing rod (303), and the other end is connected to the second base (302); The pressing portion comprises a pneumatic cylinder (305), a second upper sealing cover (306) and a second trigger rod (307); the pneumatic cylinder (305) and the second upper sealing cover (306) are sequentially sleeved on the upper portion of the mounting groove (103) from bottom to top, and the lower end surface of the pneumatic cylinder (305) is in contact with the upper end surface of the second sealing seat (301); the second trigger rod (307) is slidably fitted inside the pneumatic cylinder (305), and a cavity is formed between the upper end surface of the second trigger rod (307) and the upper end surface of the second upper sealing cover (306); the cavity is communicated with the first air path (5); the lower end of the second trigger rod (307) extends above the second sealing rod (303) and is fitted with the second sealing rod (303).

7. The gas path reversing system according to claim 6, characterized in that: The outer wall of the second sealing seat (301), the outer wall of the second trigger rod (307), the outer wall of the pneumatic cylinder (305), the outer wall of the second upper sealing cover (306) and the upper part of the second sealing rod (303) are all provided with sealing components (4).

8. The gas path reversing system according to claim 7, characterized in that: An air outlet path (102) communicated with the pneumatic trigger reversing mechanism (3) is arranged between the pneumatic cylinder (305) and the second sealing seat (301).

9. The gas path reversing system according to claim 8, characterized in that: The second upper sealing cover (306) is provided with a vent hole (308), and the vent hole (308) is in communication with the first air path (5).

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