阅读说明：本技术 一种新型插板阀 (Novel gate valve ) 是由 姜亚平 李建红 王晓凯 于 2019-08-12 设计创作，主要内容包括：本发明涉及一种新型插板阀。包括主阀体、副阀体、阀板组件、驱动装置和传动机构组件,所述主阀体和副阀体为箱体式结构,主阀体位于副阀体的正下方；所述阀板组件包括框架、盲板件、连杆机构、弹簧机构,所述驱动装置安装在副阀体上部一侧的外表面,传动机构组件与阀板组件之间形成两个闭环的链传动。本发明通过在阀板组件上设置的连杆机构和弹簧机构,能够在阀板组件的盲板件竖直向下运行到位后水平移动,使盲板件在水平方向与主阀体的阀座紧密贴合密封,当阀门开启时,阀板组件的盲板件先作水平移动与主阀体的阀座脱离,再作竖直向上运行直至阀板组件开启到位,即一个驱动装置可实现阀板组件的竖直往复运动和盲板件的水平移动。(The invention relates to a novel gate valve. The valve comprises a main valve body, an auxiliary valve body, a valve plate assembly, a driving device and a transmission mechanism assembly, wherein the main valve body and the auxiliary valve body are of box body type structures, and the main valve body is positioned right below the auxiliary valve body; the valve plate assembly comprises a frame, a blind plate piece, a connecting rod mechanism and a spring mechanism, the driving device is installed on the outer surface of one side of the upper portion of the auxiliary valve body, and two closed-loop chain transmissions are formed between the transmission mechanism assembly and the valve plate assembly. According to the invention, through the connecting rod mechanism and the spring mechanism arranged on the valve plate assembly, the blind plate piece of the valve plate assembly can horizontally move after vertically and downwardly moving to the proper position, so that the blind plate piece is tightly attached and sealed with the valve seat of the main valve body in the horizontal direction, when the valve is opened, the blind plate piece of the valve plate assembly horizontally moves to be separated from the valve seat of the main valve body, and then vertically and upwardly moves until the valve plate assembly is opened to the proper position, namely, a driving device can realize the vertical reciprocating motion of the valve plate assembly and the horizontal movement of the blind plate piece.)

1. The utility model provides a novel gate valve, includes the main valve body (1), with the vertical vice valve body (2) that is connected of the main valve body (1), the main valve body (1) is located vice valve body (2) under, its characterized in that: a driving device (3) is arranged on one side of the upper end of the outer part of the auxiliary valve body (2), a transmission mechanism assembly connected with the driving device (3) is arranged in the auxiliary valve body (2), and a valve plate assembly (10) connected with the transmission mechanism assembly is arranged in a shell formed by the main valve body (1) and the auxiliary valve body (2); the main valve body (1) and the auxiliary valve body (2) are both of a box type structure, the upper and lower butt joint parts of the auxiliary valve body (2) and the main valve body (1) are provided with openings as passages for the valve plate assembly (10) to run up and down, the front end and the rear end of the main valve body (1) are respectively provided with an end flange (28), the end flanges (28) are respectively connected with a front panel (29) and a rear panel (30) of the main valve body (1) through cylinders, the inner side of the rear panel (30) is provided with a circular valve seat (31) concentric with the end flanges (28), and the sealing surface of the valve seat (31) is parallel to the plane of the valve plate assembly (10) to run;

the valve plate assembly (10) comprises a frame (11), a spring mechanism (12), a connecting rod mechanism (13) and a blind plate piece (14);

The frame (11) comprises a left vertical frame, a right vertical frame, an upper transverse frame and a lower transverse frame, diagonal corner section steel is arranged at four corners between the vertical frame and the transverse frames, connecting parts which are in transmission connection with the transmission mechanism assembly are respectively arranged at the left side and the right side of the upper part of the frame (11), and the vertical frames at the left side and the right side of the frame (11) are used as vertical guide rails (16);

The number of the spring mechanisms (12) is 4, the spring mechanisms are uniformly arranged around a round blind plate piece (14), each spring mechanism (12) comprises a left spring seat (24), a pressure spring (25) and a right spring seat (26), the left spring seats (24) are fixedly connected with a frame (11), the right spring seats (26) are fixedly connected with a pressure plate base (20) arranged on the blind plate piece (14) through pressure plates (27), the arrangement positions of 4 groups of pressure plate bases (20) correspond to the positions of 4 spring mechanisms (12) arranged on a valve plate assembly (10), the central line of the pressure spring (25) and the horizontal plane form a certain acute angle in the opening state of the valve, and the size of the acute angle is determined by the horizontal design size of the centers of two hinge points of the left spring seat and the right spring seat of the spring mechanism (12) and the vertical distance of the centers of the two hinge points of the left spring seat;

The number of the connecting rod mechanisms (13) is 8, two of the connecting rod mechanisms are uniformly arranged between the adjacent spring mechanisms (12) in a group, each connecting rod mechanism (13) comprises a left connecting rod base (21), a connecting rod (22) and a right connecting rod base (23), the left connecting rod base (21) is fixedly connected with the blind plate piece (14), the right connecting rod base (23) is fixedly connected with the frame (11) through a steel plate, the central connecting line of two hinged holes of each connecting rod (22) forms an acute angle with the horizontal plane in the closing and opening states of the valve, the acute angle in the opening state is larger than that in the closing state, and when the vertical downward acting force of the frame (11) on the connecting rods (22) is a certain value in the closing state of the valve, the size of the acute angle is determined by the size of the component force required by the connecting rods (22;

A limiting block (17) is arranged on the frame (11), a limiting rod (18) is arranged on the blind plate piece (14), the arrangement position of the limiting rod (18) corresponds to the limiting block (17), and a top rod (19) is arranged at the lower part of the blind plate piece (14);

eight sets of guide wheel assemblies (9) are arranged in a box inner cavity formed by the main valve body (1) and the auxiliary valve body (2), the guide wheel assemblies (9) are vertically arranged in two rows, the horizontal distance between the two rows of guide wheel assemblies (9) is equal to the horizontal distance between guide rails (16) on the frame (11), the guide wheel assemblies (9) are respectively arranged in two rows on the main valve body (1) and the auxiliary valve body (2), the horizontal arrangement position of the four rows of guide wheel assemblies (9) meets the contact positioning requirement of at least two different rows of guide wheel assemblies (9) on the guide rails (16) on the frame (11) when the valve plate assembly (10) is at any operation position, each set of guide wheel assembly (9) comprises two guide wheels, and the horizontal positioning distance between the two guide wheels is equal to the structural outer surface distance of the guide rails (16) on the frame (11).

2. A novel gate valve as claimed in claim 1, wherein: the transmission mechanism component comprises a bearing seat (4), a transmission shaft (5), a driving chain wheel (6), a chain (7) and a driven chain wheel (8); two ends of a transmission shaft (5) are respectively symmetrically provided with a bearing seat (4) and a driving sprocket (6), the bearing seats (4) are installed on a cross beam arranged in an inner cavity of an auxiliary valve body (2), one end of the transmission shaft (5) is connected with an output end of a driving device (3), two side edges of the lower end part of the inner cavity of the auxiliary valve body (2) are respectively symmetrically provided with a driven sprocket (8), and a chain (7) is assembled on the driving sprocket (6) and the driven sprocket (8);

The left side and the right side of the upper part of the frame (11) are respectively provided with a connecting part which is in transmission connection with the transmission mechanism assembly and is a chain joint (15), and the chain joint (15) is connected with a chain (7) of the transmission mechanism assembly.

Technical Field

The invention relates to a novel gate valve, in particular to a gate valve which is used for metallurgical industry, chemical industry or vacuum simulation experiment system and realizes the up-and-down movement and horizontal movement of a valve plate assembly through a driving device.

Background

the gate valve that metallurgical industry used at present generally sets up two drive arrangement, and a drive arrangement drives the valve plate and realizes the switching of through-hole and blind plate, and another drive arrangement realizes laminating or breaking away from of valve plate and disk seat. Compared with the arrangement of one driving device, the two driving devices not only increase the manufacturing cost, but also increase the complexity of the opening and closing control of the valve, and easily cause the operation accidents of the valve.

Disclosure of Invention

The invention aims to provide a novel gate valve, which overcomes the defect that the traditional gate valve in the prior art is provided with two driving devices, reduces the production and manufacturing cost, simplifies the valve operation control program, and is simpler and more reliable in valve opening and closing operation.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a novel gate valve, its includes the main valve body (1), with the vertical vice valve body (2) that is connected of the main valve body (1), the main valve body (1) is located vice valve body (2) under, its characterized in that: a driving device (3) is arranged on one side of the upper end outside the auxiliary valve body (2), a transmission mechanism component connected with the driving device (3) is arranged inside the auxiliary valve body (2), a valve plate component (10) connected with the transmission mechanism component is arranged in a shell formed by the main valve body (1) and the auxiliary valve body (2), the main valve body (1) and the auxiliary valve body (2) are both box-type structures, the upper and lower butt joint parts of the auxiliary valve body (2) and the main valve body (1) are provided with openings as passages for the valve plate assembly (10) to run up and down, the front end and the rear end of the main valve body (1) are respectively provided with an end flange (28), the end flanges (28) are respectively connected with a front panel (29) and a rear panel (30) of the main valve body (1) through cylinders, a circular valve seat (31) concentric with the end flange (28) is arranged on the inner side of the rear panel (30), and the sealing surface of the valve seat (31) is parallel to the up-and-down running plane of the valve plate assembly (10);

The valve plate assembly (10) comprises a frame (11), a spring mechanism (12), a connecting rod mechanism (13) and a blind plate piece (14);

The frame (11) comprises a left vertical frame, a right vertical frame, an upper transverse frame and a lower transverse frame, diagonal corner section steel is arranged at four corners between the vertical frame and the transverse frame, chain joints (15) in transmission connection with the transmission mechanism assembly are respectively arranged at the left side and the right side of the upper part of the frame (11), and the vertical frames at the left side and the right side of the frame (11) are used as vertical guide rails (16);

the number of the spring mechanisms (12) is 4, the spring mechanisms are uniformly arranged around a round blind plate piece (14), each spring mechanism (12) comprises a left spring seat (24), a pressure spring (25) and a right spring seat (26), the left spring seats (24) are fixedly connected with a frame (11), the right spring seats (26) are fixedly connected with a pressure plate base (20) arranged on the blind plate piece (14) through pressure plates (27), the arrangement positions of 4 groups of pressure plate bases (20) correspond to the positions of 4 spring mechanisms (12) arranged on a valve plate assembly (10), the central line of the pressure spring (25) and the horizontal plane form a certain acute angle in the opening state of the valve, and the size of the acute angle is determined by the horizontal design size of the centers of two hinge points of the left spring seat and the right spring seat of the spring mechanism (12) and the vertical distance of the centers of the two hinge points of the left spring seat;

the number of the connecting rod mechanisms (13) is 8, two of the connecting rod mechanisms are uniformly arranged between the adjacent spring mechanisms (12) in a group, each connecting rod mechanism (13) comprises a left connecting rod base (21), a connecting rod (22) and a right connecting rod base (23), the left connecting rod base (21) is fixedly connected with the blind plate piece (14), the right connecting rod base (23) is fixedly connected with the frame (11) through a steel plate, and the connecting rods (22)

when the valve is in a closed state, when the vertical downward acting force of the frame (11) on the connecting rod (22) is a certain value, the size of the acute angle is determined by the size of component force required by the connecting rod (22) in the horizontal direction;

A limiting block (17) is arranged on the frame (11), a limiting rod (18) is arranged on the blind plate piece (14), the arrangement position of the limiting rod (18) corresponds to that of the limiting block (17), the limiting block (17) and the limiting rod (18) are attached and limited in the vertical direction in the opening state of the valve, and a top rod (19) is arranged at the lower part of the blind plate piece (14);

eight sets of guide wheel assemblies (9) are arranged in a box inner cavity formed by the main valve body (1) and the auxiliary valve body (2), the guide wheel assemblies (9) are vertically arranged in two rows, the horizontal distance between the two rows of guide wheel assemblies (9) is equal to the horizontal distance between guide rails (16) on the frame (11), the guide wheel assemblies (9) are respectively arranged in two rows on the main valve body (1) and the auxiliary valve body (2), the horizontal arrangement position of the four rows of guide wheel assemblies (9) meets the contact positioning requirement of at least two different rows of guide wheel assemblies (9) on the guide rails (16) on the frame (11) when the valve plate assembly (10) is at any operation position, each set of guide wheel assembly (9) comprises two guide wheels, and the horizontal positioning distance between the two guide wheels is equal to the structural outer surface distance of the guide rails (16) on the frame (11).

Furthermore, the transmission mechanism assembly comprises a bearing seat (4), a transmission shaft (5), a driving chain wheel (6), a chain (7) and a driven chain wheel (8); two ends of a transmission shaft (5) are respectively symmetrically provided with a bearing seat (4) and a driving sprocket (6), the bearing seats (4) are installed on a cross beam arranged in an inner cavity of an auxiliary valve body (2), one end of the transmission shaft (5) is connected with an output end of a driving device (3), two side edges of the lower end part of the inner cavity of the auxiliary valve body (2) are respectively symmetrically provided with a driven sprocket (8), and a chain (7) is assembled on the driving sprocket (6) and the driven sprocket (8);

The left side and the right side of the upper part of the frame (11) are respectively provided with a connecting part which is in transmission connection with the transmission mechanism assembly and is a chain joint (15), and the chain joint (15) is connected with a chain (7) of the transmission mechanism assembly.

The transmission mechanism assembly comprises a bearing seat (4), a transmission shaft (5), a driving chain wheel (6), a chain (7) and a driven chain wheel (8), wherein the two ends of the transmission shaft (5) are symmetrically provided with the bearing seat (4) and the driving chain wheel (6) respectively, the bearing seat (4) is installed on a cross beam arranged in an inner cavity of the auxiliary valve body (2), one end of the transmission shaft (5) is connected with the output end of the driving device (3), two side edges of the end part of the inner cavity of the auxiliary valve body (2) are symmetrically provided with the driven chain wheel (8) respectively, the chain (7) is assembled on the driving chain wheel (6) and the driven chain wheel (8), the chain (7) is connected with a chain joint (15) of the valve plate assembly (10), and two closed-loop chain transmissions are.

The working principle and the process of the invention are as follows: the driving device (3) drives a transmission shaft (5) of a transmission mechanism assembly and a driving sprocket (6) to synchronously rotate, a chain (7) meshed with the driving sprocket (6) drives a driven sprocket (8) to synchronously rotate, and the chain (7) drives a valve plate assembly (10) to synchronously reciprocate up and down through a chain joint (15) arranged on the valve plate assembly (10); the guide wheels of at least two sets of guide wheel assemblies (9) on each guide rail (16) are clamped on the outer surface of the structure of the guide rail (16) to ensure the vertical running track of the frame (11).

When the valve is in an opening state, a limiting block (17) arranged on a frame (11) of the valve plate assembly (10) and a limiting rod (18) arranged on the blind plate piece (14) are attached and limited in the vertical direction. When the closing operation process of the valve is executed, the driving device (3) drives the transmission mechanism assembly and drives the valve plate assembly (10) to move vertically and downwards, after the valve plate assembly (10) moves downwards to a proper position, the ejector rod (19) arranged at the lower part of the blind plate (14) abuts against the inner surface of the bottom plate of the main valve body (1) to cause the blind plate (14) to stop moving downwards, under the continuous vertical and downward action of the driving device (3) on the frame (11), the frame (11) drives the connecting rod (22) of the connecting rod mechanism (13) to tend to move horizontally, the connecting rod (22) pushes the blind plate (14) to move horizontally towards the direction of the valve seat and cling to the valve seat through the left connecting rod base (21), and finally the valve is closed to the proper position; meanwhile, a limiting block (17) arranged on a frame (11) of the valve plate assembly (10) is separated from a limiting rod (18) arranged on a blind plate piece (14) in the vertical direction, in the process that the blind plate piece (14) stops moving downwards and the frame (11) continues to move downwards, the blind plate piece (14) moves horizontally towards the valve seat direction to drive a pressing plate (27) fixedly connected with a pressing plate base (20) to move horizontally towards the valve seat direction synchronously until the valve is closed in place, meanwhile, a pressure spring (25) of a spring mechanism (12) is compressed, and the central line of the pressure spring (25) tends to the horizontal position.

When the opening operation process of the valve is executed, the driving device (3) drives the transmission mechanism assembly and drives the valve plate assembly (10) to move vertically upwards, when the frame (11) moves vertically upwards, the compression spring (25) of the spring mechanism (12) releases compression potential energy to push the blind plate (14) to move horizontally towards the opposite direction of the valve seat and separate from the valve seat, the stroke of the blind plate (14) moving horizontally towards the opposite direction of the valve seat is controlled by the vertical distance between the limiting block (17) arranged on the frame (11) and the limiting rod (18) arranged on the blind plate (14), and when the limiting block (17) and the limiting rod (18) are attached in the vertical direction for limiting, the blind plate (14) moves horizontally in place and moves vertically upwards synchronously along with the frame (11) until the valve is opened in place.

the beneficial effects of the invention by adopting the scheme are as follows:

According to the invention, through the connecting rod mechanism and the spring mechanism arranged on the valve plate assembly, the up-and-down movement of the valve plate assembly and the horizontal movement of the blind plate piece can be realized by adopting one driving device, the purchase or manufacturing cost of the driving device is reduced, the operation control program of the driving device is simplified, and the opening and closing operation of the valve is simpler and more reliable.

According to the novel gate valve, in the process of attaching or detaching the valve plate assembly to or from the valve seat, the valve plate assembly only moves in the vertical direction relative to the sealing surface of the valve seat, so that the oblique friction and the rubbing of a rubber sealing ring in a sealing pair are avoided, and the service life of the rubber sealing ring is greatly prolonged.

According to the novel gate valve, the valve plate assembly adopts the blind plate part to replace a glasses frame structure of a blind plate through plate arranged in the gate valve in the prior art, so that the production and manufacturing cost of the product is reduced.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the novel gate valve of the present invention.

fig. 2 is a schematic structural view of a valve plate assembly in an open state according to an embodiment of the novel gate valve.

Fig. 3 is a schematic structural view of a frame in a valve plate assembly of an embodiment of the novel gate valve of the present invention.

Fig. 4 is a schematic structural view of a blind plate member in a valve plate assembly according to an embodiment of the novel gate valve of the present invention.

3 fig. 3 5 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 the 3 line 3 of 3 fig. 3 4A 3- 3 a 3 of 3 the 3 present 3 invention 3. 3

fig. 6 is a cross-sectional view of the invention taken along the line of fig. 2B-B.

Fig. 7 is a cross-sectional view taken along the line of fig. 2C-C of the present invention.

Fig. 8 is a schematic structural view of a valve plate assembly in a closed state according to an embodiment of the novel gate valve.

fig. 9 is a cross-sectional view taken along line D-D of fig. 8 of the present invention.

Fig. 10 is a cross-sectional view taken along line E-E of fig. 8 in accordance with the present invention.

fig. 11 is a cross-sectional view taken along lines F-F of fig. 1 of the present invention.

In the figure: 1. a main valve body; 2. a sub-valve body; 3. a drive device; 4. a bearing seat; 5. a drive shaft; 6. a drive sprocket; 7. a chain; 8. a driven sprocket; 9. a guide wheel assembly; 10. a valve plate assembly; 11. a frame; 12. a spring mechanism; 13. a link mechanism; 14. a blind plate member; 15. a chain joint; 16. a guide rail; 17. a limiting block; 18. a limiting rod; 19. a top rod; 20. a platen base; 21. a left connecting rod base; 22. a connecting rod; 23. a right link base; 24. a left spring seat; 25. a pressure spring; 26. a right spring seat; 27. pressing a plate; 28. an end flange; 29. a front panel; 30. a rear panel; 31. a valve seat; 32. the base is convex.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

as shown in fig. 1, 2, 3, and 11, the novel gate valve of the embodiment of the present invention includes a main valve body 1 and an auxiliary valve body 2 vertically connected to the main valve body 1, the main valve body 1 is located right below the auxiliary valve body 2, a driving device 3 is disposed on one side of the upper end outside the auxiliary valve body 2, a transmission mechanism assembly connected to the driving device 3 is disposed inside the auxiliary valve body 2, the transmission mechanism assembly includes a bearing seat 4, a transmission shaft 5, a driving sprocket 6, a chain 7, and a driven sprocket 8, two ends of the transmission shaft 5 are respectively symmetrically provided with a bearing seat 4 and a driving sprocket 6, the bearing seat 4 is mounted on a cross beam disposed in an inner cavity of the auxiliary valve body 2, one end of the transmission shaft 5 is connected to an output end of the driving device 3, two side edges of the lower end portion of the inner cavity of the auxiliary valve body 2 are; a valve plate assembly 10 is arranged in a shell formed by a main valve body 1 and an auxiliary valve body 2, the valve plate assembly 10 comprises a frame 11, a spring mechanism 12, a connecting rod mechanism 13 and a blind plate member 14, the frame 11 comprises a left vertical frame, a right vertical frame, an upper transverse frame and a lower transverse frame, diagonal corner section steel is arranged at four corners between the vertical frame and the transverse frame, chain joints 15 are respectively arranged at the left side and the right side of the upper part of the frame 11 and connected with a chain 7 of a transmission mechanism assembly, and the vertical frames at the left side and the right side of the frame 11 are used as vertical guide rails (16); the main valve body 1 and the auxiliary valve body 2 are both box-type structures, the upper and lower butt joint part of the auxiliary valve body 2 and the main valve body 1 is provided with an opening as a channel for the valve plate assembly 10 to move up and down, the front end and the rear end of the main valve body 1 are respectively provided with an end flange 28, the end flanges 28 are respectively connected with a front panel 29 and a rear panel 30 of the main valve body 1 through cylinders, the inner side of the rear panel 30 is provided with a circular valve seat 31 concentric with the end flange 28, the sealing surface of the valve seat 31 is parallel to the upper and lower moving planes of the valve plate assembly 10, eight sets of guide wheel assemblies 9 are arranged in a box inner cavity formed by the main valve body 1 and the auxiliary valve body 2, the guide wheel assemblies 9 are vertically arranged in two rows, the horizontal distance between the two rows of guide wheel assemblies 9 is equal to the horizontal distance between the guide rails 16 on the frame 11, the guide wheel assemblies 9 are respectively provided with two rows and four rows on the main valve body The contact positioning of the members 9 on the guide rails 16 of the frame 11 requires that each set of guide wheel assemblies 9 comprises two guide wheels, the horizontal positioning distance between the two guide wheels being equal to the structural outer surface distance of the guide rails 16 of the frame 11.

As shown in fig. 2, 3, 4, 5, 6, and 7, the valve plate assembly 10 is in an open state. The number of the spring mechanisms 12 on the valve plate assembly 10 is 4, the spring mechanisms 12 are uniformly arranged around the round blind plate member 14, each spring mechanism 12 comprises a left spring seat 24 and a pressure spring 25, the left spring seat 24 and the right spring seat 26 are respectively provided with a guide pin shaft and a guide pin hole along the central line of the pressure spring 25 so as to meet the requirement of the compression amount of the pressure spring 25, the left spring seat 24 is fixedly connected with the frame 11, the right spring seat 26 is fixedly connected with a pressure plate base 20 arranged on the blind plate piece 14 through a pressure plate 27, the arrangement positions of 4 groups of pressure plate bases 20 correspond to the positions of 4 spring mechanisms 12 arranged on the valve plate assembly 10, the central line of the pressure spring 25 and the horizontal plane form a certain acute angle (the size of the acute angle is determined by the horizontal design size of the centers of two hinged points of the left spring seat and the right spring seat of the spring mechanism (12) and the vertical distance of the centers of the two hinged points of the left spring seat and the right spring seat), and the vertical distance of the centers; the number of the connecting rod mechanisms 13 on the valve plate assembly 10 is 8, two of the connecting rod mechanisms are a group and are uniformly arranged between the adjacent spring mechanisms 12, each connecting rod mechanism 13 comprises a left connecting rod base 21, a connecting rod 22 and a right connecting rod base 23, the left connecting rod base 21 is fixedly connected with a base bulge 32 on the blind plate piece 14 (if the base bulge 32 is not arranged on the blind plate piece 14, the outer diameter size of a sealing ring plate at the left end of the blind plate piece 14 can be increased so as to meet the structural requirement of fixed connection with the left connecting rod base 21), the right connecting rod base 23 is fixedly connected with the frame 11 through a steel plate, a connecting line of the centers of two hinged holes of the connecting rod 22 forms a certain acute angle with the horizontal plane, the horizontal distance of the centers of the two hinged holes of the connecting rod 22 is H1, and the vertical distance; a limiting block (17) is arranged on the frame (11), a limiting rod (18) is arranged on the blind plate piece (14), the arrangement position of the limiting rod (18) corresponds to the limiting block (17), and the limiting block (17) and the limiting rod (18) are attached in the vertical direction for limiting; the lower part of the blind plate part (14) is provided with a mandril (19).

as shown in fig. 8, 9 and 10, the valve plate assembly 10 is in a closed state. The spacing between a limiting block 17 arranged on the frame 11 and a limiting rod 18 arranged on the blind plate part 14 in the vertical direction is V; the horizontal distance between the centers of the two hinged holes of the connecting rod 22 of the link mechanism 13 is H2, the vertical distance between the centers of the two hinged holes of the connecting rod 22 is V2, and V2-V1 is equal to V; the center line of a compression spring 25 of the spring mechanism 12 is in a horizontal state, and the vertical distance between the centers of two hinged points of a left spring seat 24 and a right spring seat 26 is 0; namely, when the valve is in a closed position, the frame 11 moves downwards by a distance V in the vertical direction relative to the blind plate member 14, the translation distance of the blind plate member 14 relative to the frame 11 in the horizontal direction towards the direction of the valve seat 31 of the main valve body 1 is H2-H1, the horizontal distance from the left side sealing surface of the blind plate member 14 to the sealing surface of the valve seat is designed to be H2-H1 when the given valve plate assembly 10 runs up and down, and after the valve is closed to a certain position, the distance from the left side sealing surface of the blind plate member 14 to the direction of the valve seat 31 of the main valve body 1 is H2-H1, so that the left side sealing surface of the blind; when the valve plate assembly 10 is in the closed state, the connecting line of the centers of the two hinged holes of the connecting rod 22 on the connecting rod mechanism 13 still forms a certain acute angle (when the vertical downward force of the frame 11 on the connecting rod 22 is a certain value, the size of the acute angle is determined by the size of the component force required by the connecting rod 22 in the horizontal direction), and the acute angle is generally larger than 0 degrees and smaller than or equal to 45 degrees, and can be larger than 45 degrees in special cases.

the working process of the novel gate valve provided by the invention is as follows: taking the valve in the open state as an example, the frame 11 of the valve plate assembly 10 moves up and down in the space defined by the guide wheel assembly 9 and cannot move in the horizontal direction, and the left sealing surface of the blind plate member 14 of the valve plate assembly 10 keeps a certain distance from the sealing surface of the valve seat 31 of the main valve body 1, so that the rubber sealing ring on the blind plate member 14 is not scratched when the valve plate assembly 10 moves up and down in the opening and closing process. Starting a motor of a driving device 3, the driving device 3 drives a transmission shaft 5 and a driving sprocket 6 of a transmission mechanism assembly to synchronously rotate, a chain 7 meshed with the driving sprocket 6 and a driven sprocket 8 is connected with a chain joint 15 of a valve plate assembly 10 to drive the valve plate assembly 10 to vertically move downwards, when two ejector rods 19 arranged at the lower part of a blind plate 14 abut against the inner surface of a bottom plate of a main valve body 1, the blind plate 14 stops moving downwards, the driving device 3 drives a frame 11 to continuously vertically move downwards, 8 connecting rod mechanisms 13 arranged on the valve plate assembly 10 push connecting rods 22 to move towards a horizontal position through a right connecting rod base 23, the connecting rods 22 synchronously push the blind plate 14 to translate towards a valve seat 31 through a left connecting rod base 21 until the blind plate is closed to a certain position, the horizontal movement of the blind plate 14 drives a pressing plate 27 fixedly connected with the pressing plate base 20 to synchronously move horizontally, the pressing plate 27 compresses a pressure spring 25, so as to complete the action process from opening to closing. When the valve is opened, the motor of the driving device 3 is started, the driving device 3 drives the transmission shaft 5 and the driving chain wheel 6 of the transmission mechanism component to synchronously rotate in opposite directions, the chain 7 meshed with the driving chain wheel 6 and the driven chain wheel 8 is connected with the chain joint 15 of the valve plate assembly 10 to drive the frame 11 of the valve plate assembly 10 to move vertically upwards, under the self-weight action of the blind plate member 14, the compression springs 25 of the 4 spring mechanisms 12 uniformly distributed on the valve plate assembly 10 release compression potential energy to push the blind plate member 14 to horizontally move to separate from the valve seat, the horizontal distance of the blind plate member 14 separating from the valve seat 31 is determined by the vertical distance V between the limiting block 17 and the limiting rod 18, when the limiting block 17 and the limiting rod 18 are attached and limited in the vertical direction, the blind plate 14 moves horizontally in place, the blind plate 14 synchronously moves vertically upwards along with the frame 11 until the blind plate is opened in place, and the action process of the valve from being closed in place to being opened in place is completed.

According to the novel gate valve, screw transmission can be adopted in a transmission mechanism component to replace chain transmission, the number of the spring mechanisms 12 and the number of the connecting rod mechanisms 13 arranged on the valve plate component 10 can change along with the difference of the calibers of the valves, the number of the guide wheel assemblies 9 arranged on the main valve body 1 and the auxiliary valve body 2 can change along with the difference of the calibers of the valves, and the change of the design structures is within the range of patent protection.