High-vacuum pneumatic rectangular gate valve

Abstract

The high-vacuum pneumatic rectangular gate valve comprises a valve body, a valve assembly and a pneumatic driving device, a channel is formed in the valve body, valve ports communicated with the channel are formed in the two side walls of the valve body respectively, the valve assembly comprises a wedge-shaped sealing plate, a valve plate and an elastic element, the wedge-shaped sealing plate is arranged in the channel in a lifting mode, and the valve plate is arranged on the valve body. The two valve plates are connected to the two sides of the wedge-shaped sealing plate through a plurality of elastic elements respectively, a first sealing face is arranged on the side face, close to the top end, of the wedge-shaped sealing plate, and a second sealing face abutting against the first sealing face is arranged on the side face, close to the top end, of each valve plate. According to the utility model, the first sealing surface of the wedge-shaped sealing plate is gradually matched with the second sealing surface of the valve plate, so that the sealing performance of the valve port is effectively improved, and the possibility of medium leakage is reduced; under the action of the elastic element, friction between the valve plate and the valve body is reduced, and the service life of the valve is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely is a kind of high vacuum aerodynamic type rectangular gate valve. BACKGROUND

[0002] The existing rectangular gate valve has some deficiencies in practical application. On the one hand, the sealing performance of the existing rectangular gate valve needs to be improved, especially in high-pressure, high-temperature or corrosive medium environment, the ordinary gate valve sealing structure is prone to leakage, which affects the normal operation of the system and production efficiency, and may also cause environmental pollution and other problems. On the other hand, under the working condition of frequent opening and closing, the friction and wear between the valve plate and the valve body of the gate valve are more serious, which not only reduces the service life of the valve, increases the maintenance cost, but also may cause sealing failure due to wear, further affecting the performance of the valve. SUMMARY

[0003] The utility model aims at providing a kind of high vacuum aerodynamic type rectangular gate valve, with better wear resistance, the sealing performance and service life of valve are significantly improved, to solve the problem that the sealing structure of the existing rectangular gate valve is prone to leakage and causes sealing failure due to wear in the above background technique.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A kind of high vacuum aerodynamic type rectangular gate valve, including valve body, valve assembly and pneumatic drive device, the inside of the valve body is formed with channel, the two side walls of the valve body are respectively provided with valve port communicated with channel, the valve assembly includes wedge-shaped sealing plate, valve plate and elastic element, the wedge-shaped sealing plate is arranged in channel, and the two valve plates are respectively connected to the two sides of wedge-shaped sealing plate by a plurality of elastic elements, the side surface adjacent to the top end of the wedge-shaped sealing plate is provided with first sealing surface, the side surface adjacent to the top end of the valve plate is provided with second sealing surface abutting with first sealing surface, and the pneumatic drive device is connected to the wedge-shaped sealing plate at one end.

[0006] Preferably, the side wall of the wedge-shaped sealing plate is provided with a recess, the elastic element includes a guide piece, a guide column and a spring, the guide piece is fixed in the recess, a center hole is formed in the middle of the guide piece, the guide column is movably arranged in the center hole, the guide column is formed with a circular truncated cone portion connected to the valve plate at one end, and the other end is connected with the spring.

[0007] Preferably, the guide column extends to the two sides of the guide column relative to the one end of the circular truncated cone portion to form a side ear portion, a convex column is arranged on the surface opposite to the guide piece of the side ear portion, the spring is sleeved on the convex column, and the one end of the spring opposite to the convex column abuts against the side surface of the guide piece.

[0008] Preferably, the first sealing surface and the second sealing surface are both inclined upward.

[0009] Preferably, a power box for accommodating a pneumatic driving device is connected to the top of the valve body, and the power box is a rectangular box structure with an open top.

[0010] Preferably, the pneumatic driving device comprises a pneumatic cylinder mounted on the top surface of the valve body and an electromagnetic reversing valve connected to the pneumatic cylinder, the pneumatic cylinder is accommodated in the power box, and the piston rod of the pneumatic cylinder passes through the top surface of the valve body and is connected to the wedge-shaped sealing plate downward.

[0011] Preferably, a sealing groove is formed in the side surface of the valve plate abutting the inner wall of the channel, and a sealing ring is embedded in the sealing groove.

[0012] Preferably, a positioning block is connected to the bottom of the wedge-shaped sealing plate.

[0013] Preferably, the valve body is in a rectangular frame structure, and the channel is a rectangular channel.

[0014] Preferably, the valve body is in a rectangular frame structure, and the channel is a rectangular channel.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1. By gradually matching the first sealing surface of the wedge-shaped sealing plate with the second sealing surface of the valve plate, the self-sealing characteristics of the wedge-shaped structure are utilized, when the valve plate closes the valve port, with the increase of the pressure, the sealing force between the wedge-shaped sealing plate and the valve plate also increases, which effectively improves the sealing performance of the valve port, reduces the possibility of medium leakage, and is suitable for harsh working conditions such as high pressure, high temperature and corrosive medium;

[0017] 2. The pneumatic driving device has fast response speed, can quickly open and close the valve port, meets the demand of rapid flow regulation, the control of the electromagnetic reversing valve is convenient and flexible, can be integrated with an automatic control system, realizes remote control and automatic operation, and improves the intelligent level of the production process.

[0018] 3. Under the action of the spring, the valve plate moves towards the wedge-shaped sealing plate, the valve plate is separated from the inner wall of the channel, thereby reducing the friction between the valve plate and the valve body, reducing wear and tear, prolonging the service life of the valve plate, and reducing maintenance cost; at the same time, compared with the traditional sealing structure, the contact area of the wedge-shaped sealing plate and the valve plate is more reasonable, which further reduces the wear and tear. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a perspective view of the utility model of a high-vacuum pneumatic rectangular gate valve;

[0020] Figure 2A high vacuum pneumatic type rectangular gate valve is disclosed.

[0021] Figure 3 For Figure 2 A cross-sectional view of the middle section A-A.

[0022] Figure 4 For Figure 2 A cross-sectional view of the middle section B-B.

[0023] Figure 5 A perspective view of the pneumatic driving device and the valve assembly.

[0024] Figure 6 A perspective view of the valve body.

[0025] Figure 7 An exploded view of the valve assembly.

[0026] Figure 8 A perspective view of the elastic element.

[0027] Corresponding marks in the figure are: 1, valve body; 11, channel; 12, valve port; 13, air inlet; 14, air outlet; 2, valve assembly; 21, wedge-shaped sealing plate; 211, first sealing surface; 212, embedding groove; 22, valve plate; 221, second sealing surface; 222, sealing ring; 23, elastic element; 231, guide piece; 232, guide column; 233, spring; 234, circular truncated cone part; 235, side ear part; 3, pneumatic driving device; 31, air cylinder; 32, electromagnetic reversing valve; 4, power box; 5, positioning block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] Please refer to Figures 1-4 A high vacuum pneumatic type rectangular gate valve, comprising a valve body 1, a valve assembly 2 and a pneumatic driving device 3. The valve body 1 is internally formed with a channel 11, and the two side walls of the valve body 1 are respectively provided with a valve port 12 in communication with the channel 11 for the medium to pass through, and the pneumatic driving device 3 is used to drive the valve assembly 2 to open or close the valve port 12.

[0030] The valve assembly 2 comprises a wedge-shaped sealing plate 21, valve plates 22 and elastic elements 23, the wedge-shaped sealing plate 21 is arranged in the channel 11 in a lifting manner, the valve plates 22 are connected to the two sides of the wedge-shaped sealing plate 21 through the elastic elements 23 respectively, the side of the valve plate 22 away from the wedge-shaped sealing plate 21 is attached to the inner wall of the channel 11 and is used for closing the valve port 12, the side of the wedge-shaped sealing plate 21 adjacent to the top end is provided with a first sealing surface 211, and the side of the valve plate 22 adjacent to the top end is provided with a second sealing surface 221 abutting against the first sealing surface 211.

[0031] Please refer to Figure 6 In the embodiment, the valve body 1 is in a rectangular frame structure, the channel 11 is a rectangular channel, the valve plate 22 is in a rectangular plate structure, and the upper portion of the wedge-shaped sealing plate 21 is in a wedge-shaped structure attached to the valve plate 22. The two end walls of the valve body 1 are respectively provided with an air inlet 13 and an air outlet 14 communicating with the valve port 12, and the air inlet 13 and the air outlet 14 are connected with external pipelines to realize air inlet and air outlet in the channel 11.

[0032] The first sealing surface 211 of the wedge-shaped sealing plate 21 gradually cooperates with the second sealing surface 221 of the valve plate 22, the self-sealing characteristic of the wedge-shaped structure is utilized, when the valve plate 22 closes the valve port 12, the sealing force between the wedge-shaped sealing plate 21 and the valve plate 22 increases with the increase of pressure, the first sealing surface 211 and the second sealing surface 221 are closely attached, the sealing performance is effectively improved, the possibility of medium leakage is reduced, and the utility model is suitable for harsh working conditions such as high pressure, high temperature and corrosive medium.

[0033] Please refer to Figure 1 and Figure 5 The top of the valve body 1 is connected with a power box 4 used for accommodating the pneumatic driving device 3, and the power box 4 is a rectangular box structure with an open top. In the embodiment, three pneumatic driving devices 3 are arranged, and the number of the pneumatic driving devices 3 can also be set according to actual requirements. The pneumatic driving device 3 comprises a pneumatic cylinder 31 arranged on the top surface of the valve body 1 and an electromagnetic reversing valve 32 connected with the pneumatic cylinder 31, the pneumatic cylinder 31 is accommodated in the power box 4, and the piston rod of the pneumatic cylinder 31 penetrates through the top surface of the valve body 1 and is connected with the wedge-shaped sealing plate 21 downwards. The on-off of the electromagnetic reversing valve 32 is controlled to realize the reciprocating movement of the piston rod in the pneumatic cylinder 31, so as to drive the wedge-shaped sealing plate 21 and the valve plate 22 to move along the depth direction of the channel 11, thereby realizing the opening and closing of the valve plate 22 to the valve port 12.

[0034] The pneumatic driving device 3 has fast response speed, can quickly realize the opening and closing of the valve port 12, and meets the demand for rapid flow regulation; the control of the electromagnetic reversing valve 32 is convenient and flexible, can be integrated with an automatic control system, realizes remote control and automatic operation, and improves the intelligent level of the production process.

[0035] Please refer to Figure 4 and Figure 5 , the side surface of the valve plate 22 abutting with the inner wall of the channel 11 is provided with a sealing groove, and a sealing ring 222 is embedded in the sealing groove, which is used for closing the abutting position of the valve plate 22 and the inner wall of the channel 11, so as to strengthen the sealing effect of the valve port 12. In the embodiment, the sealing ring 222 is in a rectangular ring structure.

[0036] Please refer to Figure 3 , the bottom of the wedge-shaped sealing plate 21 is connected with a positioning block 5, which is used for limiting the lowest position of the downward movement of the wedge-shaped sealing plate 21 and the valve plate 22, so that the valve plate 22 is just aligned with the valve port 12 for sealing, and the sealing property of the valve plate 22 when closed is ensured; meanwhile, the positioning block 5 can also avoid the collision between the wedge-shaped sealing plate 21, the valve plate 22 and the bottom wall of the channel 11.

[0037] Please refer to Figure 5 and Figures 7-8 , the side wall of the wedge-shaped sealing plate 21 is provided with an embedding groove 212 for accommodating an elastic element 23, and the elastic element 23 includes a guide piece 231, a guide column 232 and a spring 233. The guide piece 231 is fixed in the embedding groove 212, a center hole penetrating the two side surfaces of the guide piece 231 is formed in the middle of the guide piece 231, the guide column 232 is movably arranged in the center hole, a circular truncated cone part 234 connected with the valve plate 22 is formed at one end of the guide column 232, and the other end of the guide column 232 is connected with the spring 233. The guide column 232 is used for guiding the linear movement of the valve plate 22, and avoids the deviation of the valve plate 22.

[0038] Please refer to Figure 8 In the embodiment, the guide column 232 extends to the two sides of the guide column 232 from one end of the circular truncated cone part 234 to form a side ear part 235, a convex column is arranged on the surface opposite to the guide piece 231 of the side ear part 235, the spring 233 is sleeved on the convex column, and one end of the spring 233 opposite to the convex column abuts against the side surface of the guide piece 231.

[0039] When the cylinder 31 drives the valve plate 22 to seal the valve port 12, the spring 233 provides an elastic force, so that the valve plate 22 connected with the guide column 232 can be tightly attached to the inner wall of the channel 11, and the second sealing surface 221 of the valve plate 22 is tightly attached to the first sealing surface 211 of the wedge-shaped sealing plate 21, so that the sealing performance of the valve plate 22 is improved; when the cylinder 31 drives the valve plate 22 to open the valve port 12, under the action of the spring 233, the valve plate 22 moves towards the wedge-shaped sealing plate 21, and the valve plate 22 is separated from the inner wall of the channel 11, so that the friction between the valve plate 22 and the valve body 1 is reduced, the wear is reduced, the service life of the valve plate 22 is prolonged, and the maintenance cost is reduced. Meanwhile, compared with the traditional sealing structure, the contact mode of the wedge-shaped sealing plate 21 and the valve plate 22 is more reasonable, and the wear is further reduced.

[0040] The working principle of the high-vacuum pneumatic type rectangular plug valve is as follows: when it is necessary to open the valve port 12 of the valve body 1, the electromagnetic reversing valve 32 is powered on and reversed, the cylinder 31 drives the valve plate 22 to move upwards along the channel 11 through the piston rod, the first sealing surface 211 of the wedge-shaped sealing plate 21 is separated from the second sealing surface 221 of the valve plate 22, and the valve plate 22 is separated from the valve port 12, so that the channel 11 is opened, and fluid medium can flow to both sides of the valve body 1 through the valve port 12; when it is necessary to close the valve port 12 of the valve body 1, the electromagnetic reversing valve 32 is powered on and reversed again, the cylinder 31 drives the valve plate 22 to move downwards along the channel 11 through the piston rod, and under the action of the elastic element 23, the first sealing surface 211 of the wedge-shaped sealing plate 21 is gradually tightly attached to the second sealing surface 221 of the valve plate 22; when the valve plate 22 seals the valve port 12, the valve plate 22 is also tightly pressed on the inner wall of the channel 11, so that a good sealing effect is realized, and the medium is prevented from flowing to both sides of the valve body 1 through the valve port 12.

[0041] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high vacuum aerodynamic rectangular plug valve, comprising a valve body (1), a valve assembly (2) and a pneumatic driving device (3), a channel (11) is formed in the valve body (1), and valve ports (12) are respectively formed in the two side walls of the valve body (1) and communicated with the channel (11), characterized in that: The valve assembly (2) comprises a wedge-shaped sealing plate (21), valve plates (22) and elastic elements (23), the wedge-shaped sealing plate (21) is arranged in the channel (11) in a lifting manner, the two valve plates (22) are connected on both sides of the wedge-shaped sealing plate (21) through the elastic elements (23), the first sealing surface (211) is arranged on the side surface adjacent to the top end of the wedge-shaped sealing plate (21), the second sealing surface (221) is arranged on the side surface adjacent to the top end of the valve plate (22) and abuts against the first sealing surface (211), and one end of the pneumatic driving device (3) is connected with the wedge-shaped sealing plate (21).

2. The high vacuum aerodynamic rectangular spool valve according to claim 1, characterized in that: The side wall of the wedge-shaped sealing plate (21) is provided with an embedding groove (212), the elastic element (23) comprises a guide piece (231), a guide column (232) and a spring (233), the guide piece (231) is fixed in the embedding groove (212), the guide piece (231) is provided with a center hole penetrating the two side surfaces in the middle part, the guide column (232) is movably arranged in the center hole, and the guide column (232) is formed with a circular truncated cone part (234) connected with the valve plate (22) at one end and connected with the spring (233) at the other end.

3. The high vacuum aerodynamic rectangular spool valve according to claim 2, wherein: The guide column (232) extends to both sides of the guide column (232) from the one end of the circular truncated cone part (234) to form a side ear part (235), the side ear part (235) is provided with a convex column on the surface opposite to the guide piece (231), the spring (233) is sleeved on the convex column, and the spring (233) abuts against the side surface of the guide piece (231) at the one end opposite to the convex column.

4. The high vacuum airfoil rectangular spool valve according to claim 1, wherein: The first sealing surface (211) and the second sealing surface (221) are both inclined upward.

5. The high vacuum airfoil rectangular spool valve according to claim 1, wherein: The top of the valve body (1) is connected with a power box (4) for accommodating the pneumatic driving device (3), and the power box (4) is a rectangular box structure with an open top.

6. The high vacuum airfoil rectangular spool valve according to claim 5, wherein: The pneumatic driving device (3) comprises a pneumatic cylinder (31) mounted on the top surface of the valve body (1) and an electromagnetic reversing valve (32) connected with the pneumatic cylinder (31), the pneumatic cylinder (31) is accommodated in the power box (4), and the piston rod of the pneumatic cylinder (31) penetrates through the top surface of the valve body (1) downward and is connected with the wedge-shaped sealing plate (21).

7. The high vacuum airfoil rectangular spool valve according to claim 1, wherein: The side surface of the valve plate (22) abutting against the inner wall of the channel (11) is provided with a sealing groove, and a sealing ring (222) is embedded in the sealing groove.

8. The high vacuum aerodynamic rectangular spool valve according to any one of claims 1-6, wherein: The bottom of the wedge-shaped sealing plate (21) is connected with a positioning block (5).

9. The high vacuum aerodynamic rectangular spool valve according to any one of claims 1-6, wherein: The valve body (1) is in a rectangular frame structure, and the channel (11) is a rectangular channel.

10. The high vacuum aerodynamic rectangular spool valve according to any one of claims 1-6, wherein: The two end walls of the valve body (1) are respectively provided with an air inlet (13) and an air outlet (14) communicating with the valve port (12).

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