Disc valve

Abstract

The utility model discloses a disc valve, which comprises a valve body, a valve cover structure and a sealing structure, the valve cover structure comprises a first valve cover and a second valve cover, the first valve cover and the second valve cover are respectively connected with one end of the valve body so as to form a sealing cavity together with the valve body, and the first valve cover and the second valve cover are respectively provided with a first communication part and a second communication part; the sealing structure comprises a driving assembly and a sealing assembly, the sealing assembly is slidably arranged in the sealing cavity, the driving end of the driving assembly is connected with the sealing assembly, and the sealing assembly is suitable for sliding in the sealing cavity; wherein the first valve cover and the second valve cover are provided with a first limiting part and a second limiting part respectively, the first communicating part and the second communicating part are arranged in the first limiting part and the second limiting part respectively, and when the sealing assembly is arranged in the sealing cavity in a sliding mode, the two ends of the sealing assembly are arranged in the first limiting part and the second limiting part respectively. According to the disc valve of the structure, the sealing performance of the disc valve can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to a disc valve. Background Art

[0002] A disc valve is a quick-opening and quick-closing valve that realizes opening and closing by sliding a disc. At the same time, the disc valve is designed specifically for materials with wear and erosion characteristics. Therefore, the disc valve can work continuously and normally under harsh working conditions.

[0003] In the prior art, the sliding of the disc in the disc valve is driven by a driving device, which is connected to the driving end of the driving device through a valve stem. Thus, under the drive of the driving device, the valve stem can drive the disc to slide on the valve cover, and then the disc can close or open the channel on the valve cover to realize the transportation or blockage of materials by the disc valve. However, since the disc is connected to the driving end of the driving device through the valve stem, when the driving end of the driving device drives the valve stem to move, the valve stem will shake and drive the disc to shake, and then the position of the disc will change, resulting in the disc being unable to completely close the channel on the valve cover, and the sealing performance is poor. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the present utility model is to overcome the defect that the existing disc valve has a poor sealing performance because the disc cannot completely close the channel on the valve cover.

[0005] To this end, the present utility model provides a disc valve, comprising:

[0006] A valve body;

[0007] A valve cover structure, including a first valve cover and a second valve cover which are oppositely arranged, the first valve cover and the second valve cover are respectively connected to one end of the valve body to jointly form a closed cavity with the valve body, a first communication part and a second communication part which are communicated with the closed cavity are respectively arranged on the first valve cover and the second valve cover, and the first communication part and the second communication part are correspondingly positioned;

[0008] A closing structure, including a driving component and a closing component, the closing component is slidably arranged in the closed cavity, the driving end of the driving component is connected to the closing component, and under the drive of the driving component, the closing component is adapted to slide in the closed cavity to cut off or communicate the first communication part, the second communication part and the closed cavity;

[0009] Wherein, the first valve cover and the second valve cover are respectively provided with a first limiting portion and a second limiting portion, the first connecting portion and the second connecting portion are respectively arranged in the first limiting portion and the second limiting portion, and when the closing component is slidably arranged in the closing cavity, both ends of the closing component are respectively arranged in the first limiting portion and the second limiting portion.

[0010] Optionally, in the above-mentioned disc valve, the closing component includes a first closing member and a second closing member connected to each other, the first closing member and the second closing member are both connected to the driving end of the driving component, and the first closing member is arranged in the first limiting portion and is suitable for closing or opening the first connecting portion, and the second closing member is arranged in the second limiting portion and is suitable for closing or opening the second connecting portion.

[0011] Optionally, in the above-mentioned disc valve, the closing component further includes a connecting piece, the connecting piece is connected to the driving end of the driving component, and the first closing piece and the second closing piece are respectively arranged on both sides of the connecting piece and are both connected to the connecting piece.

[0012] Optionally, in the above-mentioned disc valve, a through portion connecting the closed cavity and the outside is provided on the valve body; the drive assembly includes a drive member and a conversion unit, the drive member is arranged on the valve body, one end of the conversion unit is connected to the drive end of the drive member, and the other end passes through the through portion to be connected to the connecting member.

[0013] Optionally, in the above-mentioned disc valve, the drive assembly further comprises a fastener, and the fastener is arranged between the drive end of the drive member and the adapter unit.

[0014] Optionally, in the above-mentioned disc valve, the adapter unit includes a first adapter member and a second adapter member connected to each other, and the first adapter member is connected to the driving end of the driving member, and the second adapter member is connected to the connecting member.

[0015] Optionally, the above-mentioned disc valve further includes a mounting structure, wherein the mounting structure is arranged on the valve body, and the drive assembly is arranged on the mounting structure.

[0016] Optionally, in the above-mentioned disc valve, the mounting structure includes a fixing member and a mounting bracket, the fixing member is arranged on the valve body, the mounting bracket is connected to the fixing member, and the driving assembly is arranged on the mounting bracket.

[0017] Optionally, in the above-mentioned disc valve, a relief portion connecting the through portion and the closed cavity is provided on the fixing member, so that one end of the adapter unit connected to the connecting member is suitable for passing through the through portion and the relief portion to be connected to the connecting member.

[0018] Optionally, the above-mentioned disk valve further includes a seal, which is arranged between the adapter unit and the fixing member to seal the gap between the adapter unit and the fixing member.

[0019] The technical solution provided by the present utility model has the following advantages:

[0020] 1. The disk valve provided by the present utility model, through the valve cover structure and the closing structure arranged on the valve body, wherein the valve cover structure includes a first valve cover and a second valve cover arranged oppositely, and the first valve cover and the second valve cover are respectively connected to one end of the valve body, so as to jointly form a closed cavity with the valve body. At the same time, a first communication part and a second communication part communicated with the closed cavity are respectively arranged on the first valve cover and the second valve cover, and the positions of the first communication part and the second communication part correspond to each other, so that materials can flow into the closed cavity through the first communication part and flow out to the outside through the second communication part in the closed cavity, and further enable the materials to flow on the valve body. The closing structure specifically includes a driving component and a closing component. The closing component is slidably arranged in the closed cavity, and the driving component is arranged on the valve body, and the driving end of the driving component is connected to the closing component. Thus, under the drive of the driving component, the closing component can slide in the closed cavity, and when the closing component slides to a position corresponding to the first communication part and the second communication part, the closing component can cut off the communication between the first communication part and the second communication part and the closed cavity, and further block the materials flowing on the valve body. When the closing component slides to other positions, the first communication part and the second communication part can be communicated with the closed cavity again, so that the materials can continue to flow on the valve body, and further realize the control of the flow state of the materials by the valve body. In addition, a first limiting part and a second limiting part are respectively arranged on the first valve cover and the second valve cover, and the first communication part and the second communication part are respectively arranged in the first limiting part and the second limiting part. At the same time, when the closing component is slidably arranged in the closed cavity, the opposite ends of the closing component are respectively arranged in the first limiting part and the second limiting part. Thus, when the closing component slides in the closed cavity, the two ends of the closing component will be restricted in the first limiting part and the second limiting part, and further can avoid that when the closing component is driven by the driving component to slide in the closed cavity and shakes, the closing component will be restricted in the first limiting part and the second limiting part, so that the position of the closing component will not change, so that the closing component can always close or open the first communication part and the second communication part, which is beneficial to improving the sealing performance of the disk valve. Description of the Drawings

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A cross-sectional schematic diagram of a disc valve provided in an embodiment of the utility model;

[0023] Figure 2 A schematic plan view of a disc valve provided in an embodiment of the utility model;

[0024] Figure 3 A schematic diagram of a limiting portion provided in an embodiment of the utility model;

[0025] Figure 4 A schematic diagram of the movement of the closure assembly provided in an embodiment of the utility model;

[0026] Description of reference numerals:

[0027] 1- Valve body;

[0028] 2-valve cover structure; 21-first valve cover; 211-first connecting portion; 212-first limiting portion; 22-second valve cover; 221-second connecting portion;

[0029] 3-enclosed structure; 31-driving assembly; 311-driving member; 312-adapting unit; 3121-first adapting member; 3122-second adapting member; 313-fastening member; 32-enclosed assembly; 321-first enclosed member; 322-second enclosed member; 323-connecting member;

[0030] 4-installation structure; 41-fixing member; 42-installation bracket;

[0031] 5- Seals. DETAILED DESCRIPTION

[0032] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0036] Embodiment 1

[0037] This embodiment provides a disk valve, as Figures 1 to 4 shown, including a valve body 1, a valve cover structure 2, and a closing structure 3. The valve cover structure 2 includes a first valve cover 21 and a second valve cover 22 arranged opposite to each other. The first valve cover 21 and the second valve cover 22 are respectively connected to one end of the valve body 1 to jointly form a closed cavity with the valve body 1. A first communication part 211 and a second communication part 221 communicating with the closed cavity are respectively provided on the first valve cover 21 and the second valve cover 22, and the first communication part 211 and the second communication part 221 are in corresponding positions; the closing structure 3 includes a driving assembly 31 and a closing assembly 32. The closing assembly 32 is slidably arranged in the closed cavity, and the driving end of the driving assembly 31 is connected to the closing assembly 32. Under the drive of the driving assembly 31, the closing assembly 32 is adapted to slide in the closed cavity to cut off or communicate the first communication part 211, the second communication part 221, and the closed cavity; wherein, a first limiting part 212 and a second limiting part are respectively provided on the first valve cover 21 and the second valve cover 22. The first communication part 211 and the second communication part 221 are respectively arranged in the first limiting part 212 and the second limiting part, and when the closing assembly 32 is slidably arranged in the closed cavity, both ends of the closing assembly 32 are respectively arranged in the first limiting part 212 and the second limiting part.

[0038] The disk valve with the above structure, through the valve cover structure 2 and the sealing structure 3 provided on the valve body 1. Among them, the valve cover structure 2 includes a first valve cover 21 and a second valve cover 22 arranged oppositely, and the first valve cover 21 and the second valve cover 22 are respectively connected to one end of the valve body 1, so as to jointly form a closed cavity with the valve body 1. At the same time, a first communication part 211 and a second communication part 221 communicated with the closed cavity are respectively provided on the first valve cover 21 and the second valve cover 22. The first communication part 211 and the second communication part 221 are respectively a first communication channel and a second communication channel in this embodiment, and the positions of the first communication part 211 and the second communication part 221 correspond to each other, so that materials can flow into the closed cavity through the first communication part 211 and flow out to the outside through the second communication part 221 in the closed cavity, and further enable the materials to flow on the valve body 1. The sealing structure 3 specifically includes a driving component 31 and a sealing component 32. Among them, the sealing component 32 is slidably arranged in the closed cavity, the driving component 31 is arranged on the valve body 1, and the driving end of the driving component 31 is connected to the sealing component 32. Thus, under the drive of the driving component 31, the sealing component 32 can slide in the closed cavity, and when the sealing component 32 slides to a position corresponding to the first communication part 211 and the second communication part 221, the sealing component 32 can cut off the connection between the first communication part 211 and the second communication part 221 and the closed cavity, and further block the materials flowing on the valve body 1. When the sealing component 32 slides to other positions, the first communication part 211 and the second communication part 221 can be communicated with the closed cavity again, so that the materials can continue to flow on the valve body 1, and further realize the control of the flow state of the materials by the valve body 1.

[0039] In addition, a first limiting part 212 and a second limiting part are respectively provided on the first valve cover 21 and the second valve cover 22. The first limiting part 212 and the second limiting part are respectively a first limiting groove and a second limiting groove in this embodiment, and the first communication part 211 and the second communication part 221 are respectively arranged in the first limiting part 212 and the second limiting part. At the same time, when the sealing component 32 is slidably arranged in the closed cavity, the opposite ends of the sealing component 32 are respectively arranged in the first limiting part 212 and the second limiting part. Thus, when the sealing component 32 slides in the closed cavity, the two ends of the sealing component 32 will be restricted in the first limiting part 212 and the second limiting part, and further can avoid that when the sealing component 32 is driven by the driving component 31 to slide in the closed cavity and shakes, the sealing component 32 will be restricted in the first limiting part 212 and the second limiting part, so that the position of the sealing component 32 will not change, so that the sealing component 32 can always close or open the first communication part 211 and the second communication part 221, which is beneficial to improving the sealing performance of the disk valve.

[0040] The disk valve provided in this embodiment, such as Figure 1As shown, the closing assembly 32 includes a first closing member 321 and a second closing member 322 which are connected to each other. Both the first closing member 321 and the second closing member 322 are connected to the driving end of the driving assembly 31. The first closing member 321 is disposed within the first limiting portion 212 and is adapted to close or open the first communication portion 211, and the second closing member 322 is disposed within the second limiting portion and is adapted to close or open the second communication portion 221.

[0041] For the disk valve with the above structure, by providing that the closing assembly 32 includes a first closing member 321 and a second closing member 322 which are connected to each other. In this embodiment, the first closing member 321 and the second closing member 322 are the first valve disk and the second valve disk respectively. Both the first closing member 321 and the second closing member 322 are connected to the driving end of the driving assembly 31, and the first closing member 321 is disposed within the first limiting portion 212, so that the first limiting portion 212 can limit the first closing member 321. The second closing member 322 is disposed within the second limiting portion, so that the second limiting member can limit the second closing member 322. In addition, under the drive of the driving assembly 31, the first closing member 321 can close or open the first communication portion 211 within the first limiting portion 212, and the second closing member 322 can close or open the second communication portion 221 within the second limiting portion.

[0042] The disk valve provided in this embodiment, as Figure 1 shown, the closing assembly 32 further includes a connecting member 323. The connecting member 323 is connected to the driving end of the driving assembly 31, and the first closing member 321 and the second closing member 322 are respectively disposed on both sides of the connecting member 323 and are both connected to the connecting member 323.

[0043] For the disk valve with the above structure, by providing that the closing assembly 32 further includes a connecting member 323. In this embodiment, the connecting member 323 is a valve core. The connecting member 323 is connected to the driving end of the driving assembly 31 together, and the first closing member 321 and the second closing member 322 are respectively disposed at both ends of the connecting member 323 and are respectively connected to the connecting member 323. Thus, when the driving end of the driving assembly 31 drives the connecting member 323 to move, the connecting member 323 can drive the first closing member 321 and the second closing member 322 to move simultaneously, which is beneficial to ensuring that the moving trajectories of the first closing member 321 and the second closing member 322 are consistent, so that the first closing member 321 and the second closing member 322 can close or open the first communication portion 211 and the second communication portion 221 simultaneously.

[0044] The disk valve provided in this embodiment, as Figure 1 and Figure 2As shown, a through portion connecting the closed cavity and the outside is provided on the valve body 1; the driving assembly 31 includes a driving member 311 and a switching unit 312, the driving member 311 is arranged on the valve body 1, one end of the switching unit 312 is connected to the driving end of the driving member 311, and the other end passes through the through portion and is connected to the connecting member 323.

[0045] The disc valve of the above structure includes a driving member 311 and a transfer unit 312 through a through-portion opened on the valve body 1 and a driving assembly 31. The through-portion is a through hole in the present embodiment, and the driving member 311 is a cylinder in the present embodiment, wherein the through-portion connects the closed cavity and the outside, and the driving member 311 is arranged on the valve body 1. One end of the transfer unit 312 is connected to the driving end of the driving member 311, and the other end passes through the through-portion and extends into the closed cavity, and is connected to the closed assembly 32 slidably arranged in the closed cavity, so that under the drive of the driving member 311, the transfer unit 312 can drive the closed assembly 32 to slide in the closed cavity, thereby enabling the closed assembly 32 to close or open the first connecting portion 211 and the second connecting portion 221.

[0046] The disc valve provided in this embodiment is as follows Figure 1 As shown, the driving assembly 31 further includes a fastener 313 , and the fastener 313 is disposed between the driving end of the driving member 311 and the adapter unit 312 .

[0047] The disc valve of the above structure also includes a fastener 313 by setting the drive component 31. The fastener 313 is a clamping nut in this embodiment. The fastener 313 is specifically arranged between the driving end of the driving member 311 and the adapter unit 312, so as to connect the driving end of the driving member 311 and the adapter unit 312, and can fix the connection position of the driving end of the driving member 311 and the adapter unit 312 to avoid separation of the driving end of the driving member 311 and the adapter unit 312, which is beneficial to improve the connection strength between the driving end of the driving member 311 and the adapter unit 312.

[0048] The disc valve provided in this embodiment is as follows Figure 1 As shown, the adapter unit 312 includes a first adapter 3121 and a second adapter 3122 connected to each other, and the first adapter 3121 is connected to the driving end of the driving member 311, and the second adapter 3122 is connected to the connecting member 323.

[0049] The disc valve of the above structure includes a first adapter 3121 and a second adapter 3122 connected to each other by setting an adapter unit 312. The first adapter 3121 and the second adapter 3122 are respectively the first valve stem and the second valve stem in the present embodiment. Since the closing component 32 is slidably arranged in the closing cavity, the closing cavity needs to have enough space for the closing component 32 to slide, and thus the closing component 32 needs a sufficiently long adapter unit 312 to be connected to the driving end of the driving member 311. Therefore, the adapter unit 312 is composed of the first adapter 3121 and the second adapter 3122 connected to each other, and the first adapter 3121 and the second adapter 3122 are threadedly connected to connect the driving end of the driving member 311 and the closing component 32.

[0050] The disc valve provided in this embodiment is as follows Figure 1 and Figure 2 As shown, it also includes a mounting structure 4 , which is arranged on the valve body 1 , and the drive assembly 31 is arranged on the mounting structure 4 .

[0051] The disc valve of the above structure is provided with a mounting structure 4 on the valve body 1, and the driving member 311 is specifically provided on the mounting structure 4, so that when the mounting structure 4 is installed on the valve body 1, the driving member 311 is also installed on the valve body 1, so that the driving end of the driving member 311 can be connected to the adapter unit 312 and drive the closing component 32 slidingly provided in the closing cavity. At the same time, the driving member 311 is installed on the valve body 1 through the mounting structure 4, which also facilitates the installation and disassembly of the driving member 311.

[0052] The disc valve provided in this embodiment is as follows Figure 1 and Figure 2 As shown, the mounting structure 4 includes a fixing member 41 and a mounting bracket 42 . The fixing member 41 is disposed on the valve body 1 , the mounting bracket 42 is connected to the fixing member 41 , and the driving assembly 31 is disposed on the mounting bracket 42 .

[0053] The disc valve of the above structure includes a fixing member 41 and a mounting bracket 42 by setting a mounting structure 4. The fixing member 41 is a fixed flange in this embodiment, wherein the fixing member 41 is arranged on the valve body 1, and the mounting bracket 42 is connected to the fixing member 41, so that the mounting bracket 42 is installed on the valve body 1, and the drive assembly 31 is arranged on the mounting bracket 42, so that the drive assembly 31 is installed on the valve body 1.

[0054] The disc valve provided in this embodiment is as follows Figure 1 and Figure 2 As shown, a giving portion communicating with the through portion and the closed cavity is provided on the fixing member 41 , so that one end of the adapter unit 312 connected to the connecting member 323 is suitable for passing through the through portion and the giving portion to connect with the connecting member 323 .

[0055] The disc valve of the above structure has a paving portion on the fixing part 41. The paving portion is a paving hole in this embodiment. The paving portion can connect the through-portion, the closed cavity and the outside, so that one end of the adapter unit 312 can pass through the paving portion and the through-portion into the closed cavity and connect with the closed component 32.

[0056] The disc valve provided in this embodiment is as follows Figure 1 As shown, a sealing member 5 is also included. The sealing member 5 is arranged between the adapter unit 312 and the fixing member 41 to seal the gap between the adapter unit 312 and the fixing member 41 .

[0057] The disc valve of the above structure is provided with a sealing member 5 between the adapter unit 312 and the fixing member 41. The sealing member 5 in this embodiment is a sealing member such as a packing and a sealing ring. Therefore, when one end of the adapter unit 312 passes through the yielding portion and the through-hole portion into the closed cavity and is connected to the closed component 32, the sealing member 5 can seal the gap between the adapter unit 312 and the fixing member 41, thereby preventing the material flowing into the closed cavity through the first connecting portion 211 from flowing out from the yielding portion and the through-hole portion to the outside, which is beneficial to further improve the sealing performance of the disc valve.

[0058] The disc valve provided by the present utility model comprises a valve cover structure 2 and a sealing structure 3 provided on a valve body 1. Among them, the valve cover structure 2 includes a first valve cover 21 and a second valve cover 22 which are oppositely arranged, and the first valve cover 21 and the second valve cover 22 are respectively connected to one end of the valve body 1, so as to jointly form a closed cavity with the valve body 1. At the same time, a first communication part 211 and a second communication part 221 which are communicated with the closed cavity are respectively provided on the first valve cover 21 and the second valve cover 22, and the positions of the first communication part 211 and the second communication part 221 correspond to each other, so that materials can flow into the closed cavity through the first communication part 211 and flow out to the outside through the second communication part 221 in the closed cavity, thereby enabling the materials to flow on the valve body 1. The sealing structure 3 specifically includes a driving component 31 and a sealing component 32. The sealing component 32 is slidably arranged in the closed cavity, and the driving component 31 is arranged on the valve body 1, and the driving end of the driving component 31 is connected to the sealing component 32. Thus, under the drive of the driving component 31, the sealing component 32 can slide in the closed cavity, and when the sealing component 32 slides to a position corresponding to the first communication part 211 and the second communication part 221, the sealing component 32 can cut off the communication between the first communication part 211 and the second communication part 221 and the closed cavity, thereby blocking the materials flowing on the valve body 1. When the sealing component 32 slides to other positions, the first communication part 211 and the second communication part 221 can be communicated with the closed cavity again, so that the materials can continue to flow on the valve body 1, thereby realizing the control of the flow state of the materials by the valve body 1. In addition, a first limiting part 212 and a second limiting part are respectively provided on the first valve cover 21 and the second valve cover 22, and the first communication part 211 and the second communication part 221 are respectively arranged in the first limiting part 212 and the second limiting part. At the same time, when the sealing component 32 is slidably arranged in the closed cavity, the opposite ends of the sealing component 32 are respectively arranged in the first limiting part 212 and the second limiting part. Thus, when the sealing component 32 slides in the closed cavity, the two ends of the sealing component 32 will be restricted in the first limiting part 212 and the second limiting part, so as to avoid the situation that when the sealing component 32 is driven by the driving component 31 to slide in the closed cavity and shakes, the sealing component 32 will be restricted in the first limiting part 212 and the second limiting part, so that the position of the sealing component 32 will not change, so that the sealing component 32 can always close or open the first communication part 211 and the second communication part 221, which is beneficial to improving the sealing performance of the disc valve.

[0059] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present inventive concept.

Claims

1. A disc valve, characterized in that: include: Valve body (1); The valve cover structure (2) comprises a first valve cover (21) and a second valve cover (22) which are arranged opposite to each other, wherein the first valve cover (21) and the second valve cover (22) are respectively connected to one end of the valve body (1) to form a closed cavity together with the valve body (1), and the first valve cover (21) and the second valve cover (22) are respectively provided with a first communication portion (211) and a second communication portion (221) which are arranged to communicate with the closed cavity, and the first communication portion (211) and the second communication portion (221) are located correspondingly; The closed structure (3) comprises a driving component (31) and a closing component (32), wherein the closing component (32) is slidably disposed in the closed cavity, a driving end of the driving component (31) is connected to the closing component (32), and under the drive of the driving component (31), the closing component (32) is suitable for sliding in the closed cavity to separate or connect the first connecting portion (211), the second connecting portion (221) and the closed cavity; The first valve cover (21) and the second valve cover (22) are respectively provided with a first limiting portion (212) and a second limiting portion, the first connecting portion (211) and the second connecting portion (221) are respectively arranged in the first limiting portion (212) and the second limiting portion, and when the closing component (32) is slidably arranged in the closing cavity, the two ends of the closing component (32) are respectively arranged in the first limiting portion (212) and the second limiting portion.

2. The disc valve according to claim 1, characterized in that The closing component (32) comprises a first closing member (321) and a second closing member (322) which are connected to each other. The first closing member (321) and the second closing member (322) are both connected to the driving end of the driving component (31). The first closing member (321) is arranged in the first limiting portion (212) and is suitable for closing or opening the first connecting portion (211). The second closing member (322) is arranged in the second limiting portion and is suitable for closing or opening the second connecting portion (221).

3. The disc valve according to claim 2, characterized in that The closing component (32) further comprises a connecting member (323), wherein the connecting member (323) is connected to the driving end of the driving component (31), and the first closing member (321) and the second closing member (322) are respectively arranged on both sides of the connecting member (323) and are both connected to the connecting member (323).

4. The disc valve according to claim 3, characterized in that The valve body (1) is provided with a through portion connecting the closed cavity and the outside; the drive assembly (31) comprises a drive member (311) and a switching unit (312); the drive member (311) is arranged on the valve body (1); one end of the switching unit (312) is connected to the drive end of the drive member (311), and the other end passes through the through portion and is connected to the connecting member (323).

5. The disc valve according to claim 4, characterized in that The driving assembly (31) further comprises a fastener (313), wherein the fastener (313) is arranged between the driving end of the driving member (311) and the adapter unit (312).

6. The disc valve according to claim 5, characterized in that The adapter unit (312) comprises a first adapter (3121) and a second adapter (3122) which are connected to each other, and the first adapter (3121) is connected to the driving end of the driving member (311), and the second adapter (3122) is connected to the connecting member (323).

7. The disc valve according to claim 6, characterized in that It also comprises a mounting structure (4), wherein the mounting structure (4) is arranged on the valve body (1), and the drive assembly (31) is arranged on the mounting structure (4).

8. The disc valve according to claim 7, characterized in that The mounting structure (4) comprises a fixing member (41) and a mounting bracket (42), wherein the fixing member (41) is arranged on the valve body (1), the mounting bracket (42) is connected to the fixing member (41), and the driving assembly (31) is arranged on the mounting bracket (42).

9. The disc valve according to claim 8, characterized in that The fixing member (41) is provided with a relief portion communicating with the through portion and the closed cavity, so that one end of the adapter unit (312) connected to the connecting member (323) is suitable for passing through the through portion and the relief portion to be connected to the connecting member (323).

10. The disc valve according to claim 9, characterized in that It also includes a sealing member (5), which is arranged between the adapter unit (312) and the fixing member (41) to seal the gap between the adapter unit (312) and the fixing member (41).

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