Oil-free gate valve

Abstract

The invention discloses an oil-free gate valve which comprises a valve body. The driving mechanism is connected to the valve body; the valve core is arranged in the valve body, one end of the valve core is connected with the driving mechanism, and the valve core is linked with the driving mechanism and moves along the valve body to open or close a channel on the valve body; the valve element comprises a movable frame arranged in the valve body, and one end of the movable frame is connected with the driving mechanism. The supporting pieces are arranged on the moving frame at intervals, first grooves are symmetrically formed in the supporting pieces, and the first grooves are plated with silver; a plurality of balls, one of which is arranged in one of the first grooves and is a ceramic ball; the elastic valve plate assembly is arranged in the valve body, makes contact with the ball and is used for opening or closing the channel. And friction between parts is reduced, and particles generated by friction are prevented from polluting a vacuum system.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to an oil-free plug-in valve. Background Art

[0002] The gate valve is a valve used in vacuum systems. It is used to isolate vacuum pipes and plays the role of airflow control, vacuum isolation, equipment protection, and safety assurance. It is an important vacuum component. Its structure mainly includes: valve body, valve plate, sealing ring, valve stem and driving mechanism. The valve stem is driven by the driving mechanism, and the valve stem links the valve plate and sealing ring to move. When in the closed state, a completely sealed space is formed between the valve plate and the sealing ring and the valve body to prevent gas leakage. When in the open state, the valve plate and the sealing ring are separated from the valve body, and the gas can flow. Since the valve stem is linked to the valve plate and the sealing ring and moves in the valve body, there must be friction between the components, such as the friction between the sealing ring and the valve body, the friction between the valve plate and the valve body, etc. Long-term operation will cause wear and affect the sealing performance, and the particles caused by friction will also pollute the vacuum system. Summary of the invention

[0003] In view of the above-mentioned deficiencies existing in the related art, the purpose is to provide an oil-free gate valve to solve the technical problems that the friction and wear between the components in the related art lead to reduced sealing performance, and the particles caused by friction will contaminate the vacuum system; The technical solution to achieve the purpose is: an oil-free gate valve, comprising: a valve body; and a driving mechanism connected to the valve body; and also comprising: a valve core, arranged in the valve body, one end of which is connected to the driving mechanism, and is linked by the driving mechanism to move along the valve body to open or close the channel on the valve body; The valve core comprises: a movable frame, which is arranged in the valve body and one end of which is connected to the driving mechanism; A plurality of support members are arranged on the moving frame at intervals, and the support members are symmetrically provided with first grooves, and the first grooves are silver-plated; A plurality of balls, one of which is disposed at one of the first grooves, and the ball is a ceramic ball; and an elastic valve plate assembly, disposed in the valve body and in contact with the ball, for opening or closing the passage; The valve core has at least a first state and a second state, the first state is an open state, the elastic valve plate assembly is within the valve body and does not contact the valve body, the valve core is away from the channel, and the channel is open; The second state is a closed state, the driving mechanism is actuated, and the movable frame is linked to move along the valve body, the support member and the ball move together with the movable frame, the ball rolls in the first groove, the ball is linked to move together with the elastic valve plate assembly, and the ball rolls along the elastic valve plate assembly, the elastic valve plate assembly is gradually stretched open, and the elastic valve plate assembly closes the channel.

[0004] Further: the mobile frame comprises: a frame body, one end of which is connected to the driving mechanism; Eight guide wheels connected to the edge of the frame body and used to roll along the inner wall of the valve body; A plurality of shock absorbing rods are arranged at intervals on the frame body and are used to contact the elastic valve plate assembly when the elastic valve plate assembly is compressed; and a leading assembly connected to the other end of the frame body.

[0005] Further: the frame body includes: a plate body, the outer shape of which is a square structure, the middle position of the plate body has a first through space, a plurality of first installation slots and a plurality of second installation slots, The first installation groove surrounds the first through space and is spaced apart from the first through space. The support member is disposed at the first installation groove. The second installation groove is arranged between the first installation grooves, and is spaced apart from the first through space and the first installation groove. The shock absorbing rod is arranged at the second installation groove. The edge of the plate body is also provided with four third mounting grooves, and the guide wheels are arranged one by one at the third mounting grooves; A connecting seat, arranged on one end of the plate body, for connecting with the driving mechanism; and an avoidance portion, which is arranged on the other end of the plate body and in the first through space.

[0006] Furthermore: the thickness of the avoidance portion is smaller than the thickness of the plate body.

[0007] Further: the leading assembly comprises: a first guide plate, one end of which is connected to the elastic valve plate assembly; A second guide plate, one end of which is connected to the elastic valve plate assembly and is spaced apart from the first guide plate; and a stopper connected to the other end of the first guide piece and the other end of the second guide piece, forming a second through space between the first guide piece and the second guide piece, wherein the second through space accommodates the avoidance portion.

[0008] Further: the support member comprises: a support seat body, which is arranged in the first installation groove, and the support seat body has the first groove, and the silver plating thickness at the first groove is 3-5 microns; and a clamping spring connected to the support base body and clamping the support base body at the first mounting groove.

[0009] Further: the elastic valve plate assembly comprises: a first valve plate structure, arranged in the valve body and on one side of the movable frame, a side wall of one side of the first valve plate structure having a plurality of second grooves, the second grooves being in one-to-one contact with the ball; A second valve plate structure is arranged in the valve body, arranged on the other side of the movable frame, and arranged opposite to the first valve plate structure. A side wall of the second valve plate structure has a plurality of third grooves, and the third grooves are in one-to-one contact with the ball. and an elastic member, which is arranged at the first through space and connects the first valve plate structure and the second valve plate structure.

[0010] Further: the first valve plate structure comprises: a first valve plate, having the second groove on one side wall; and a first sealing member, disposed on the other side wall of the first valve plate, for forming a seal with the valve body; The second groove has a shallowest point and a deepest point, and a width dimension of the shallowest point is smaller than a width dimension of the deepest point.

[0011] Further: the second valve plate structure comprises: a second valve plate, having the third groove on one side wall; and a second sealing member, disposed on the other side wall of the second valve plate, for forming a seal with the valve body; The third groove has the same structure as the second groove.

[0012] Further: the elastic member includes: a first plate connected to the first valve plate; and a second plate connected to the second valve plate, wherein the second plate is a bent structure and has a third through space between the second plate and the first plate.

[0013] The above technical solution has the following beneficial effects: an oil-free gate valve, compared with the related art, is provided with a valve body, a driving mechanism and a valve core, and the valve core further comprises: a moving frame, a support, a ball and an elastic valve plate assembly; The valve core is arranged in the valve body, one end of which is connected to the driving mechanism, and is linked with the driving mechanism to move along the valve body to open or close the channel on the valve body; The valve core has at least a first state and a second state, the first state is an open state, the elastic valve plate assembly is in the valve body and does not contact the valve body, the valve core is away from the channel, and the channel is open; The second state is the closed state, the driving mechanism is actuated, the linkage moving frame moves along the valve body, the support member and the ball move along with the moving frame, the ball rolls in the first groove, the ball links with the elastic valve plate assembly and moves together, and the ball rolls along the elastic valve plate assembly, the elastic valve plate assembly is gradually opened, and the elastic valve plate assembly closes the channel to ensure sealing; Due to the rolling of the ball, there is rolling friction between the ball and the support and the elastic valve plate assembly, and the friction resistance is relatively small. In addition, the first groove is silver-plated (with self-lubricating properties), and the ball is a ceramic ball (with a relatively low friction coefficient), which further reduces the friction resistance, reduces the particles caused by friction, and protects the vacuum system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram when the valve core is in the first state; Figure 2 It is a structural schematic diagram when the valve core is in the second state; Figure 3 This is the exploded view of the valve core; Figure 4 It is a structural schematic diagram of the valve core after assembly; Figure 5 It is a structural diagram of a part of the driving mechanism, the frame body, the guide wheel, the shock absorbing rod, the support member and the ball; Figure 6 It is a structural schematic diagram of the plate; Figure 7 is a schematic diagram of the structure of the leading component; Figure 8 is a schematic structural diagram of a first valve plate and an elastic member; Fig. 9 It is a structural schematic diagram of the valve core being in the first state, with the ball being in the deepest part of the second groove or the third groove; Fig.10 It is a structural schematic diagram of the valve core being in the second state, with the ball being in the shallowest part of the second groove or the third groove; Fig.11 is a schematic diagram of the structure of the second groove or the third groove; Fig.12 is a schematic diagram of the structure of the elastic member; Fig.13 It is a partial cross-sectional view of the moving frame, the supporting member and the sphere; Fig.14 is a partial cross-sectional view of a support member; In the figure: 10. valve core, 11. movable frame, 11-1. frame body, 11-11. plate body, 11-11-1. first through space, 11-11-2. first mounting groove, 11-11-3. second mounting groove, 11-11-4. third mounting groove, 11-12. connecting seat, 11-13. avoidance part, 11-2. guide wheel, 11-3. shock absorbing rod, 11-4. leading assembly, 11-41. first guide plate, 11-42. second guide plate, 11-43. stopper, 11-44. second through space, 12. support member, 12-1. first groove, 12-2. support Seat body, 12-3. Retaining spring, 13. Ball, 14. Elastic valve plate assembly, 14-1. First valve plate structure, 14-11. Second groove, 14-12. First valve plate, 14-13. First sealing member, 14-11-1. Shallowest point, 14-11-2. Deepest point, 14-2. Second valve plate structure, 14-21. Third groove, 14-22. Second valve plate, 14-23. Second sealing member, 14-3. Elastic member, 14-31. First plate, 14-32. Second plate, 14-33. Third through space, 100. Valve body, 101. Channel, 200. Driving mechanism. DETAILED DESCRIPTION

[0015] In order to make the content easier to understand, the following is a further detailed description based on specific embodiments and in conjunction with the accompanying drawings; An oil-free gate valve solves the technical problems in the related art that the friction and wear between components lead to reduced sealing performance, and the particles caused by friction will pollute the vacuum system. It reduces the friction and wear between components, ensures sealing performance, reduces the particles caused by friction, and protects the positive effects of the vacuum system. The overall idea is as follows: Implementation

[0016] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Fig. 9 , Fig.10 , Fig.13 , Fig.14 As shown; an oil-free gate valve, comprising: a valve body 100; and a driving mechanism 200, connected to the valve body 100; and further comprising: a valve core 10, arranged in the valve body 100, one end of which is connected to the driving mechanism 200, and is linked by the driving mechanism 200 to move along the valve body 100 to open or close the channel 101 on the valve body 100; The valve core 10 includes: a moving frame 11, which is arranged in the valve body 100 and one end of which is connected to the driving mechanism 200; A plurality of support members 12 are arranged at intervals on the mobile frame 11, and first grooves 12-1 are symmetrically arranged on the support members 12, and the first grooves 12-1 are silver-plated; A plurality of balls 13, wherein one ball 13 is disposed at one of the first grooves 12-1, and the ball 13 is a ceramic ball; and an elastic valve plate assembly 14, which is disposed in the valve body 100 and contacts the ball 13, and is used to open or close the channel 101; Specifically, during implementation, the valve core 10 has at least a first state and a second state. The first state is an open state, the elastic valve plate assembly 14 is in the valve body 100 and does not contact the valve body 100 , the valve core 10 is away from the channel 101 , and the channel 101 is open; The second state is the closed state, the driving mechanism 200 is actuated, the linkage moving frame 11 moves along the valve body 100, the support member 12 and the ball 13 move together with the moving frame 11, the ball 13 rolls at the first groove 12-1, the ball 13 links with the elastic valve plate assembly 14 to move together, and the ball 13 rolls along the elastic valve plate assembly 14, the elastic valve plate assembly 14 is gradually opened, and the elastic valve plate assembly 14 closes the channel 101, ensuring the sealing performance; Due to the rolling of the ball 13, there is rolling friction between the ball 13 and the support 12 and the elastic valve plate assembly 14, and the friction resistance is relatively small. In addition, the first groove 12-1 is silver-plated (with self-lubricating properties), and the ball 13 is a ceramic ball (with a relatively low friction coefficient and relatively small friction resistance, and no lubricating oil needs to be added), which further reduces the friction resistance, reduces the particles caused by friction, and protects the vacuum system. Another embodiment: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Fig. 9 , Fig.10 As shown; when implemented, the mobile frame 11 includes: a frame body 11-1, one end of which is connected to the driving mechanism 200; eight guide wheels 11-2, connected to the edge of the frame body 11-1, used to roll along the inner wall of the valve body 100; a plurality of shock absorbing rods 11-3, arranged at intervals on the frame body 11-1, used to contact the elastic valve plate assembly 14 when the elastic valve plate assembly 14 is compressed; and a leading assembly 11-4, connected to the other end of the frame body 11-1; The frame body 11-1 includes: a plate body 11-11, which is a square structure in appearance, and the middle position of the plate body 11-11 has a first through space 11-11-1, a plurality of first installation grooves 11-11-2 and a plurality of second installation grooves 11-11-3, The first installation groove 11-11-2 surrounds the first through space 11-11-1 and is spaced apart from the first through space 11-11-1. The support member 12 is disposed at the first installation groove 11-11-2. The second installation groove 11-11-3 is arranged between the first installation groove 11-11-2, and is spaced apart from the first through space 11-11-1 and the first installation groove 11-11-2. The shock absorbing rod 11-3 is arranged at the second installation groove 11-11-3. The edge of the plate body 11-11 is also provided with four third mounting grooves 11-11-4, and the guide wheels 11-2 are arranged one by one at the third mounting grooves 11-11-4; a connecting seat 11-12, disposed on one end of the plate body 11-11, for connecting with the driving mechanism 200; and an avoidance portion 11-13, disposed on the other end of the plate body 11-11 and disposed in the first through space 11-11-1; The shape of the first through space 11-11-1 is roughly a "T"-shaped structure, which is conducive to the installation of the elastic member 14-3 and is relatively convenient for assembly; The connection seats 11-12 are provided to facilitate connection with the connecting rod on the driving mechanism 200, and the assembly is relatively convenient; The thickness of the avoidance portion 11-13 is smaller than the thickness of the plate body 11-11, so that the avoidance portion 11-13 can avoid the leading component 11-4 without causing collision; The guide wheels 11-2 are a common structure in the prior art. Four of them form a group and are arranged to form a quadrilateral structure. The center line of one group is parallel to the plate body 11-11, and the center line of the other group is perpendicular to the plate body 11-11. The guide wheels 11-2 roll along the inner wall of the valve body 100 (with relatively small resistance and no need to add lubricating oil). Not only does it move smoothly, but it also forms a guide, which is conducive to the valve core 10 being able to move along a straight line. Among them, the number of shock-absorbing rods 11-3 is six, for example: rubber rods, three in a group, symmetrically arranged between groups, used to separate the plate body 11-11 and the first valve plate 14-12, and used to separate the plate body 11-11 and the second valve plate 14-22, which has a vibration reduction effect and reduces noise; The leading guide assembly 11-4 comprises: a first guide piece 11-41, one end of which is connected to the elastic valve plate assembly 14; a second guide piece 11-42, one end of which is connected to the elastic valve plate assembly 14 and is spaced apart from the first guide piece 11-41; and a stopper 11-43, which is connected to the other end of the first guide piece 11-41 and the other end of the second guide piece 11-42, and forms a second through space 11-44 between the first guide piece 11-41 and the second guide piece 11-42, and the second through space 11-44 accommodates the avoidance portion 11-13; One end of the first guide plate 11 - 41 is connected to the first valve plate 14 - 12 by a bolt, and the assembly is relatively convenient; One end of the second guide plate 11-42 is connected to the second valve plate 14-22 by a bolt, and the assembly is relatively convenient; The stopper 11-43 is a rectangular block, which is connected to the other ends of the first guide piece 11-41 and the second guide piece 11-42 by bolts, and is relatively easy to assemble; A leading component 11-4 is provided, which is conducive to limiting the elastic valve plate component 14. When closing the channel 101, the driving mechanism 200 links the valve core 10 and moves along the valve body 100 until the leading component 11-4 contacts the valve body 100 to form a guide support. At this time, the first valve plate structure 14-1 and the second valve plate structure 14-2 are aligned with the channel 101, and the frame body 11-1, the guide wheel 11-2, the shock absorbing rod 11-3, the support member 12 and the ball 13 continue to move. The ball 13 rolls in the first groove 12-1, and the ball 13 rolls along the elastic valve plate component 14. The elastic member 14-3 is gradually opened, and the first valve plate structure 14-1 and the second valve plate structure 14-2 close the channel 101; Another embodiment: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig. 9 , Fig.10 , Fig.13 , Fig.14 As shown; when implemented, the support member 12 includes: a support seat body 12-2, which is arranged in the first mounting groove 11-11-2, and the support seat body 12-2 has the first groove 12-1, and the silver plating thickness at the first groove 12-1 is 3-5 microns; and a clamping spring 12-3, which is connected to the support seat body 12-2 and clamps the support seat body 12-2 at the first mounting groove 11-11-2; The number of the supporting members 12 is six and evenly distributed on the moving frame 11. The number of the balls 13 is twelve and two balls 13 are arranged on one supporting member 12, which is conducive to evenly supporting the elastic valve plate assembly 14. The number of the support members 12 is not limited to six, for example: three, four, five, eight, and their uniform distribution is conducive to the ball 13 exerting force on the first valve plate structure 14-1 and the second valve plate structure 14-2 with relatively uniform force and good stability; The silver plating thickness at the first groove 12-1 is 3-5 microns, which has self-lubricating properties. The ball 13 is a ceramic ball (with a relatively low friction coefficient), which reduces friction resistance. The support seat 12-2 is roughly T-shaped and has a first groove 12-1, which is convenient for setting the ball 13 and enables the ball 13 to rotate smoothly. The retaining spring 12-3 is a common structure in the prior art, which is conducive to assembling the support seat body 12-2 at the first mounting groove 11-11-2, and the assembly is relatively convenient; Another embodiment: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 As shown; during implementation, the elastic valve plate assembly 14 includes: a first valve plate structure 14-1, which is arranged in the valve body 100 and on one side of the mobile frame 11, and a plurality of second grooves 14-11 are provided on one side wall of the first valve plate structure 14-1, and the second grooves 14-11 are in one-to-one contact with the ball 13; a second valve plate structure 14-2, which is arranged in the valve body 100 and on the other side of the mobile frame 11, and is arranged opposite to the first valve plate structure 14-1, and a plurality of third grooves 14-21 are provided on one side wall of the second valve plate structure 14-2, and the third grooves 14-21 are in one-to-one contact with the ball 13; and an elastic member 14-3, which is arranged at the first through space 11-11-1, and connects the first valve plate structure 14-1 and the second valve plate structure 14-2; The first valve plate structure 14-1 comprises: a first valve plate 14-12, having a second groove 14-11 on one side wall thereof; and a first sealing member 14-13, disposed on the other side wall of the first valve plate 14-12, for forming a seal with the valve body 100; The second groove 14-11 has a shallowest part 14-11-1 and a deepest part 14-11-2. The width of the shallowest part 14-11-1 is smaller than the width of the deepest part 14-11-2. The cross section from the shallowest part 14-11-1 to the deepest part 14-11-2 forms a half-water drop-shaped structure (such as Fig.11 ), the shape and size of the second groove 14-11 are conducive to cooperation with the ball 13, reducing friction resistance, and facilitating linkage of the first valve plate structure 14-1 and the second valve plate structure 14-2; The first valve plate 14 - 12 is a circular plate structure, and the first sealing member 14 - 13 is an O-ring, which is conducive to ensuring sealing; The second valve plate structure 14-2 includes: a second valve plate 14-22, having the third groove 14-21 on one side wall; and a second sealing member 14-23, disposed on the other side wall of the second valve plate 14-22, for forming a seal with the valve body 100; The third groove 14-21 has the same structure as the second groove 14-11; The second valve plate 14-22 is a circular plate structure, and the second sealing member 14-23 is an O-ring, which is conducive to ensuring sealing; The elastic member 14-3 includes: a first plate 14-31 connected to the first valve plate 14-12; and a second plate 14-32 connected to the second valve plate 14-22, wherein the second plate 14-32 is a bent structure and has a third through space 14-33 between the second plate 14-32 and the first plate 14-31; The first plate 14 - 31 is a flat plate, which is connected to the first valve plate 14 - 12 by bolts, and the assembly is relatively convenient; The second plate 14-32 is formed by bending a plate and has elasticity. The second plate 14-32 is connected to the second valve plate 14-22 and the first plate 14-31 by bolts, and the assembly is relatively convenient. The third through space 14-33 formed between the first plate 14-31 and the second plate 14-32 is a buffer space, which is conducive to the elastic member 14-3 being stretched and rebounded, forming an elastic effect; Structure in the prior art: See Figure 1 , Figure 2 The valve body 100 and the driving mechanism 200 are common structures in the prior art, which are not the inventive point of the present invention. They are only for better describing the present invention and facilitating understanding of the technical solution of the present invention. After reading the disclosed content, ordinary technicians in the field can directly and unambiguously know how to set them without creative labor or excessive experiments. Here’s how it works: The valve core 10 has a first state and a second state; The first state is an open state, at this time, the elastic valve plate assembly 14 is in the valve body 100 (due to the rebound of the elastic member 14-3, the first valve plate structure 14-1 and the second valve plate structure 14-2 return to their positions, at this time, the ball 13 is at the deepest part 14-11-2), and does not contact the inner wall of the valve body 100, and the valve core 10 is away from the channel 101, and the channel 101 is opened; The second state is the closed state. When closed, the driving mechanism 200 is actuated, and the linkage moving frame 11 moves along the valve body 100, and the support member 12 and the ball 13 move together with the moving frame 11. The ball 13 rolls at the first groove 12-1, and the ball 13 links the elastic valve plate assembly 14 to move together, and the ball 13 rolls along the elastic valve plate assembly 14 until the leading assembly 11-4 contacts the valve body 100, and the leading assembly 11-4 forms a guide support. At this time, the first valve plate structure 14-1 and the second valve plate structure 14-2 are aligned with the channel 101, and the frame body 11-1, the guide wheel 11-2, the shock absorbing rod 11-3, the support member 12 and the ball 13 are aligned with the channel 101. The ball 13 continues to move, and the ball 13 rolls in the first groove 12-1, the second groove 14-11 and the third groove 14-21, and the elastic member 14-3 is gradually stretched open (the elastic member 14-3 has a rebound force, which is conducive to the return of the first valve plate structure 14-1 and the second valve plate structure 14-2 when the channel 101 needs to be opened. The first valve plate structure 14-1 and the second valve plate structure 14-2 are not in contact with the valve body 100, which reduces the friction between the components and avoids the particles generated by the friction from contaminating the vacuum system). When the ball 13 reaches the shallowest point 14-11-1, the first valve plate structure 14-1 and the second valve plate structure 14-2 close the channel 101; In the description, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicating directions or positional relationships are based on the positional relationships described in the drawings and are only for the convenience of description or simplified description, rather than indicating specific directions that must be possessed; the operation process described in the embodiments is not an absolute usage procedure and may be adjusted accordingly in actual use; Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the relevant field; the words "first", "second" and similar words used in the specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not necessarily indicate a quantity limitation, but indicate the existence of at least one, which needs to be determined according to the content of the embodiment; The above is only a preferred specific implementation method, but the scope of protection is not limited to it. Any equivalent replacement or change made according to the technical solution and its inventive concept within the technical scope disclosed by any technician familiar with this technical field should be covered by the scope of protection.

Claims

1. An oil-free gate valve, comprising: Valve body (100); and a driving mechanism (200) connected to the valve body (100); characterized in that it further comprises: a valve core (10) disposed in the valve body (100), one end of which is connected to the driving mechanism (200), and is linked by the driving mechanism (200) to move along the valve body (100) to open or close the channel (101) on the valve body (100); The valve core (10) comprises: a movable frame (11) arranged in the valve body (100), one end of which is connected to the driving mechanism (200); A plurality of support members (12) are arranged at intervals on the moving frame (11), the support members (12) are symmetrically provided with first grooves (12-1), and the first grooves (12-1) are silver-plated; a plurality of spheres (13), one of the spheres (13) being arranged at one of the first grooves (12-1), and the sphere (13) being a ceramic sphere; and an elastic valve plate assembly (14), which is disposed in the valve body (100) and contacts the ball (13) and is used to open or close the channel (101); The valve core (10) has at least a first state and a second state, the first state being an open state, the elastic valve plate assembly (14) being inside the valve body (100) and not in contact with the valve body (100), and the valve core (10) being away from the channel (101), opening the channel (101); The second state is a closed state, the driving mechanism (200) is actuated, and the movable frame (11) is linked to move along the valve body (100), the support member (12) and the ball (13) are moved together with the movable frame (11), the ball (13) rolls in the first groove (12-1), the ball (13) is linked to move along with the elastic valve plate assembly (14), and the ball (13) rolls along the elastic valve plate assembly (14), the elastic valve plate assembly (14) is gradually stretched open, and the elastic valve plate assembly (14) closes the channel (101).

2. The oil-free gate valve according to claim 1, characterized in that: The mobile frame (11) comprises: a frame body (11-1), one end of which is connected to the driving mechanism (200); Eight guide wheels (11-2) connected to the edge of the frame body (11-1) and used for rolling along the inner wall of the valve body (100); A plurality of shock absorbing rods (11-3) are arranged at intervals on the frame body (11-1) and are used to contact the elastic valve plate assembly (14) when the elastic valve plate assembly (14) is compressed; and a leading assembly (11-4) connected to the other end of the frame body (11-1).

3. The oil-free gate valve according to claim 2, characterized in that: The frame body (11-1) comprises: a plate body (11-11) having a square structure in appearance, wherein the middle position of the plate body (11-11) has a first through space (11-11-1), a plurality of first installation grooves (11-11-2) and a plurality of second installation grooves (11-11-3), The first installation groove (11-11-2) surrounds the first through space (11-11-1) and is arranged at a distance from the first through space (11-11-1). The support member (12) is arranged at the first installation groove (11-11-2). The second installation groove (11-11-3) is arranged between the first installation grooves (11-11-2), and is spaced apart from the first through space (11-11-1) and the first installation groove (11-11-2). The shock absorbing rod (11-3) is arranged at the second installation groove (11-11-3). The edge of the plate body (11-11) is also provided with four third installation grooves (11-11-4), and the guide wheels (11-2) are arranged one-to-one at the third installation grooves (11-11-4); a connecting seat (11-12), arranged on one end of the plate body (11-11) and used for connecting to the driving mechanism (200); and an avoidance portion (11-13) arranged on the other end of the plate body (11-11) and arranged in the first penetrating space (11-11-1).

4. The oil-free gate valve according to claim 3, characterized in that: The thickness dimension of the avoidance portion (11-13) is smaller than the thickness dimension of the plate body (11-11).

5. The oil-free gate valve according to claim 4, characterized in that: The leading assembly (11-4) comprises: a first guide plate (11-41), one end of which is connected to the elastic valve plate assembly (14); A second guide plate (11-42), one end of which is connected to the elastic valve plate assembly (14) and is spaced apart from the first guide plate (11-41); and a stopper (11-43) connected to the other end of the first guide piece (11-41) and the other end of the second guide piece (11-42), forming a second through space (11-44) between the first guide piece (11-41) and the second guide piece (11-42), wherein the second through space (11-44) accommodates the avoidance portion (11-13).

6. The oil-free gate valve according to claim 3, characterized in that: The support member (12) comprises: a support seat body (12-2) arranged in the first installation groove (11-11-2), the support seat body (12-2) having the first groove (12-1), the silver plating thickness at the first groove (12-1) being 3-5 micrometers; and a clamping spring (12-3) connected to the support seat body (12-2) and clamping the support seat body (12-2) at the first mounting groove (11-11-2).

7. The oil-free gate valve according to claim 3, characterized in that: The elastic valve plate assembly (14) comprises: a first valve plate structure (14-1), which is arranged in the valve body (100) and on one side of the movable frame (11); a side wall of one side of the first valve plate structure (14-1) is provided with a plurality of second grooves (14-11); the second grooves (14-11) are in one-to-one contact with the ball (13); A second valve plate structure (14-2) is arranged in the valve body (100), on the other side of the movable frame (11), and opposite to the first valve plate structure (14-1); a side wall of one side of the second valve plate structure (14-2) is provided with a plurality of third grooves (14-21), and the third grooves (14-21) are in one-to-one contact with the ball (13); and an elastic member (14-3) disposed at the first through space (11-11-1) and connecting the first valve plate structure (14-1) and the second valve plate structure (14-2).

8. The oil-free gate valve according to claim 7, characterized in that: The first valve plate structure (14-1) comprises: a first valve plate (14-12) having a second groove (14-11) on one side wall; and a first sealing member (14-13), arranged on the other side wall of the first valve plate (14-12) and used to form a seal with the valve body (100); The second groove (14-11) has a shallowest point (14-11-1) and a deepest point (14-11-2), and the width of the shallowest point (14-11-1) is smaller than the width of the deepest point (14-11-2).

9. The oil-free gate valve according to claim 8, characterized in that: The second valve plate structure (14-2) comprises: a second valve plate (14-22) having a third groove (14-21) on one side wall; and a second sealing member (14-23), arranged on the other side wall of the second valve plate (14-22) and used to form a seal with the valve body (100); The third groove (14-21) has the same structure as the second groove (14-11).

10. The oil-free gate valve according to claim 9, characterized in that: The elastic member (14-3) comprises: a first plate (14-31) connected to the first valve plate (14-12); and a second plate (14-32) connected to the second valve plate (14-22); the second plate (14-32) is a bent structure and has a third through space (14-33) between the second plate (14-32) and the first plate (14-31).

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