A gate valve

Abstract

The present invention discloses a gate valve, the technical scheme of which mainly includes a valve body, a gate plate and a driving member, a valve cavity for fluid to pass through is formed in the valve body, the gate plate is connected to the driving member, the driving member is used for driving the gate plate to move up and down and to isolate the valve cavity, blocking plates are arranged at both ends of the gate plate, the blocking plates are arranged in a trapezoidal structure, and the upper end surface of the blocking plate is larger than the lower end surface structure; the valve cavity is divided into a feed cavity, a blocking cavity and a discharge cavity in sequence along the fluid conveying direction, a sliding groove is arranged on the upper wall of the valve body, a buffer member is slidingly connected in the sliding groove, a first end of the buffer member is located in the feed cavity, and a second end of the buffer member is located in the blocking cavity; during the movement of the gate plate, the blocking plate can abut against the second end of the buffer member, so that the first end of the buffer member moves in the same direction as the gate plate, the gate valve can buffer the fluid in the pipe during the opening and closing process, protect the safe use of the gate plate, and improve the service life of the gate plate.

Description

Technical Field

[0001] The present invention relates to the field of valves, and more particularly to a gate valve. Background Art

[0002] The gate valve is an important fluid control device. The gate valve's opening and closing parts are gate plates, and the gate plate's movement direction is perpendicular to the fluid direction. The gate valve is sealed by the contact between the valve seat and the gate plate. The existing gate plates have the following problems and situations: 1. When opening and closing, due to the high flow rate of the fluid in the pipe, the fluid will impact the gate plate. If the instantaneous impact force is too large, it will directly cause damage to the gate plate; 2. During the opening and closing process, when it is in the half-open and half-closed process, due to the smaller contact area between the gate plate and the fluid, the bearing force of the lower half of the gate plate will increase, which is also easy to cause damage to the gate plate. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of the present invention is to provide a gate valve which can buffer the fluid in the pipe during the opening and closing process, thereby protecting the gate plate from being used safely and increasing the service life of the gate plate.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a gate valve, comprising a valve body, a gate plate and a driving member, wherein a valve cavity for fluid to pass through is formed in the valve body, the gate plate is connected to the driving member, the driving member is used to drive the gate plate to move up and down and to perform a partitioning operation on the valve cavity, blocking plates are arranged at both ends of the gate plate, the blocking plates are arranged in a trapezoidal structure, and the upper end surface of the blocking plate is larger than the lower end surface structure;

[0005] The valve cavity is divided into a feed cavity, a blocking cavity and a discharge cavity in sequence along the fluid conveying direction. A sliding groove is provided on the upper wall of the valve body. A buffer is slidably connected in the sliding groove. The first end of the buffer is located in the feed cavity, and the second end is located in the blocking cavity.

[0006] During the movement of the gate plate, the blocking plate can abut against the second end of the buffer member, so that the first end of the buffer member moves in the same direction as the gate plate, and when the gate plate moves downward, the first end of the buffer member moves downward;

[0007] When the gate plate moves upward, the first end of the buffer moves upward.

[0008] The present invention is further configured as follows: the buffer member includes a first buffer plate and a second buffer plate, and the first buffer plate and the second buffer plate are both provided with a plurality of water outlet holes;

[0009] The first buffer plate and the second buffer plate are hingedly connected via a hinge shaft, and a torsion spring is provided at a hinge point between the first buffer plate and the second buffer plate.

[0010] The present invention is further configured as follows: a limit groove is provided on the lower wall of the valve body, a linkage plate is slidably connected to the lower wall of the valve body, and one end of the linkage plate is linked to the lower end of the blocking plate;

[0011] When the blocking plate pushes the linkage plate to move toward the limiting groove, the linkage plate pushes the first buffer plate to rotate.

[0012] The present invention is further configured as follows: the cross section of the limiting groove is configured as a triangular structure, and the groove depth of the limiting groove at one end away from the linkage plate is greater than the groove depth at one end close to the linkage plate.

[0013] The present invention is further configured such that: during the movement of the gate plate, there are at least three positional relationships between the first buffer plate and the second buffer plate:

[0014] S1, when the gate is in a blocked state, the first buffer plate and the second buffer plate are in a first state;

[0015] S2, when the gate is in the initial open state, the first buffer plate and the second buffer plate are in the second state;

[0016] S3, when the gate plate is gradually opened in the S2 state, and until the first buffer plate enters into the sliding groove, the first buffer plate and the second buffer plate are in the third state.

[0017] The present invention is further configured such that: when the first buffer plate and the second buffer plate are in a first state, the linkage plate pushes the first buffer plate to abut against the groove wall of the limiting groove, and at this time, the torsion spring is in an uncompressed state.

[0018] The present invention is further configured such that: when the first buffer plate and the second buffer plate are in the second state, the fluid pushes the first buffer plate to twist toward the gate plate, and at this time, the water outlet hole on the first buffer plate is arranged obliquely upward;

[0019] The water outlet hole on the second buffer plate is arranged obliquely downward.

[0020] The present invention is further configured such that: when one end of the first buffer plate close to the second buffer plate enters into the sliding groove, the water outlet hole on the second buffer plate is arranged obliquely downward.

[0021] The present invention is further configured as follows: the buffer component further includes a linkage portion and a return spring, and the linkage portion is slidably connected in the sliding groove via the return spring.

[0022] To sum up, the present invention has the following beneficial effects: during the movement of the gate plate, the blocking plate on one side of the gate plate can abut against the second end of the buffer, so that the overall position of the buffer changes. Specifically, since the upper width of the blocking plate is greater than the lower width, the blocking plate will gradually abut against the second end of the buffer during the downward movement of the blocking plate, thereby pushing the buffer to move obliquely downward, thereby achieving the effect of adjusting the position of the first end of the buffer.

[0023] Similarly, when the blocking plate moves downward, the buffer element moves the first end upward under its own reset structure, thereby buffering the fluids in different areas and avoiding the impact caused by the small effective area of ​​the gate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of a gate valve;

[0025] Figure 2 It is a cross-sectional view of the gate valve;

[0026] Figure 3 is a schematic diagram of the three-dimensional structure of the buffer;

[0027] Figure 4 is a schematic diagram of the three-dimensional structure of the buffer component in the first state;

[0028] Figure 5 is a schematic diagram of the three-dimensional structure of the buffer member in the second state;

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the buffer component in the third state.

[0030] Figure numerals: 1. valve body; 11. valve chamber; 12. feed chamber; 13. blocking chamber; 14. discharge chamber; 15. limit groove; 16. linkage plate; 2. gate plate; 21. blocking plate; 3. driving member; 4. sliding groove; 5. buffer member; 51. first buffer plate; 52. second buffer plate; 53. linkage part; 6. water outlet. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Reference Figures 1 to 6As shown, in order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gate valve, comprising a valve body 1, a gate plate 2 and a driving member 3, wherein a valve cavity 11 for fluid to pass through is formed in the valve body 1, the gate plate 2 is connected to the driving member 3, the driving member 3 is used to drive the gate plate 2 to move up and down, and to perform a partition operation on the valve cavity 11, blocking plates 21 are arranged at both ends of the gate plate 2, the blocking plates 21 are arranged in a trapezoidal structure, and the upper end surface of the blocking plate 21 is larger than the lower end surface structure;

[0033] The valve cavity 11 is divided into a feed cavity 12, a blocking cavity 13 and a discharge cavity 14 in sequence along the fluid conveying direction. A sliding groove 4 is provided on the upper wall of the valve body 1. A buffer 5 is slidingly connected in the sliding groove 4. The first end of the buffer 5 is located in the feed cavity 12, and the second end is located in the blocking cavity 13.

[0034] During the movement of the gate plate 2, the blocking plate 21 can abut against the second end of the buffer member 5, so that the first end of the buffer member 5 moves in the same direction as the gate plate 2. When the gate plate 2 moves downward, the first end of the buffer member 5 moves downward.

[0035] When the gate plate 2 moves upward, the first end of the buffer member 5 moves upward.

[0036] In the design of the present invention, during the movement of the gate plate 2, the blocking plate 21 on one side of the gate plate 2 can abut against the second end of the buffer 5, so that the overall position of the buffer 5 changes. Specifically, Figure 2 As shown, since the upper width of the blocking plate 21 is greater than the lower width, the blocking plate 21 will gradually abut against the second end of the buffer 5 during the downward movement, thereby pushing the buffer 5 to move obliquely downward, thereby achieving the effect of adjusting the position of the first end of the buffer 5.

[0037] Similarly, when the blocking plate 21 moves downward, the buffer member 5 moves the first end upward under its own reset structure, thereby buffering the fluids in different areas and avoiding the impact caused by the small effective area of ​​the gate plate 2.

[0038] The present invention is further configured as follows: the buffer member 5 includes a first buffer plate 51 and a second buffer plate 52, and a plurality of water outlet holes 6 are disposed on the first buffer plate 51 and the second buffer plate 52;

[0039] The first buffer plate 51 and the second buffer plate 52 are hingedly connected via a hinge shaft, and a torsion spring is provided at a hinge point between the first buffer plate 51 and the second buffer plate 52 .

[0040] According to the design of this structure, when the first buffer plate 51 and / or the second buffer plate 52 are located in the feed chamber 12, since the first buffer plate 51 and the second buffer plate 52 are hinged by the torsion spring and the hinge shaft, different buffering effects will be formed when the buffer member 5 is located at different positions of the valve chamber 11.

[0041] The present invention is further configured such that: during the movement of the gate plate 2, there are at least three positional relationships between the first buffer plate 51 and the second buffer plate 52:

[0042] S1, when the gate plate 2 is in a blocked state, the first buffer plate 51 and the second buffer plate 52 are in a first state;

[0043] S2, when the gate 2 is in the initial open state, the first buffer plate 51 and the second buffer plate 52 are in the second state;

[0044] S3, when the gate plate 2 is gradually opened in the S2 state, and until the first buffer plate 51 enters into the sliding groove 4, the first buffer plate 51 and the second buffer plate 52 are in the third state.

[0045] The present invention is further configured as follows: a limiting groove 15 is provided on the lower wall of the valve body 1, a linkage plate 16 is slidably connected to the lower wall of the valve body 1, and one end of the linkage plate 16 is linked to the lower end of the blocking plate 21;

[0046] When the blocking plate 21 pushes the linkage plate 16 to move toward the limiting groove 15 , the linkage plate 16 pushes the first buffer plate 51 to rotate.

[0047] When the first buffer plate 51 and the second buffer plate 52 are in the first state, the linkage plate 16 pushes the first buffer plate 51 to abut against the groove wall of the limiting groove 15, and at this time, the torsion spring is in an uncompressed state.

[0048] The design of this structure mainly corresponds to the first state of the buffer 5. Figure 4 and Figure 2 As shown, when the second end is completely pushed into the sliding groove 4 by the blocking plate 21, the lower end of the first buffer plate 51 is located in the limiting groove 15. At this time, as the blocking plate 21 continues to move downward, the blocking plate 21 abuts against the linkage plate 16, so that the linkage plate 16 moves toward the first buffer plate 51 and pushes the first buffer plate 51 to twist to the left until it abuts against the left groove wall of the limiting groove 15. At this time, due to the clamping effect on both sides, the first buffer plate 51 is limited, and in this state, the torsion spring is in a compressed stress state. Even if the water pressure on both sides of the first buffer plate 51 is unbalanced, the torsion spring can still be kept from deformation, thereby ensuring that the service life of the torsion spring is long enough during long-term work.

[0049] The cross section of the limiting groove 15 is arranged in a triangular structure, and the groove depth of the limiting groove 15 at one end away from the linkage plate 16 is greater than the groove depth at one end close to the linkage plate 16 .

[0050] The design of this structure can avoid being affected by space during the process of pushing the first buffer plate 51 to twist.

[0051] Furthermore, a sliding groove for the linkage plate 16 to slide is provided on the lower valve wall, and a compression spring is provided between the linkage plate 16 and the sliding groove. When the blocking plate pushes the linkage plate 16 to move to the left, the linkage plate 16 will squeeze the compression spring. When the gate plate 2 moves upward, the blocking plate 21 is separated from the linkage plate 16, and the linkage plate 16 will be reset under the action of the compression spring, thereby releasing the limiting effect on the first buffer plate 51.

[0052] Even without the design of the compression spring, after the restriction on one end of the linkage plate 16 is released, the first buffer plate 51 will rotate along the hinge axis under the action of the fluid, thereby pushing the linkage plate 16 away.

[0053] The present invention is further configured as follows: when the first buffer plate 51 and the second buffer plate 52 are in the second state, the fluid pushes the first buffer plate 51 to twist toward the gate plate 2, and at this time, the water outlet hole 6 on the first buffer plate 51 is arranged obliquely upward;

[0054] The water outlet holes 6 on the second buffer plate 52 are arranged obliquely downward.

[0055] like Figure 5 As shown, when the buffer member 5 moves upward, when the fluid flows from left to right, a stable impact force will be formed on the first buffer plate 51. Under the action of the impact force, the first buffer plate 51 will rotate counterclockwise. At this time, the water outlet hole 6 of the second buffer plate 52 is set obliquely downward. Since the angle of the first buffer plate 51 has changed, the water outlet hole 6 of the first buffer plate 51 is set obliquely upward. After the water flows through the first buffer plate 51 and the second buffer plate 52 body for the first buffering effect, due to the different flow directions of the upper and lower sections, a second slight impact will occur, further improving the buffering effect.

[0056] The present invention is further configured such that when one end of the first buffer plate 51 close to the second buffer plate 52 enters into the sliding groove 4 , the water outlet hole 6 on the second buffer plate 52 is arranged obliquely downward.

[0057] The design of the structure is based on the fact that in the second state, the buffer plate continues to move upward, such as Figure 6 As shown, when the second buffer plate 52 enters into the sliding groove 4 first and then the first buffer plate 51 enters into the sliding groove 4, the angle of the first buffer plate 51 will be limited due to the influence of the groove wall of the sliding groove 4. In this state, it can buffer the upper part of the fluid while guiding the fluid to move obliquely downward, thereby reducing the impact of the fluid on the gate plate 2 and protecting the gate plate 2.

[0058] The present invention is further configured as follows: the buffer 5 also includes a linkage portion 53 and a return spring, and the linkage portion 53 is slidably connected to the sliding groove 4 through the return spring. The design of this structure can push the buffer 5 to move and compress the return spring when the blocking plate 21 abuts against the buffer 5.

[0059] When the blocking plate 21 is separated from the buffer member 5 , the buffer member 5 moves upward under the action of the return spring.

[0060] like Figures 3 to 6 As shown, abutment blocks are provided on both sides of the linkage portion 53 to abut against the return spring. Furthermore, the linkage plate 16 is provided in the same manner.

[0061] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A gate valve, comprising a valve body (1), a gate plate (2) and a driving member (3), wherein a valve cavity (11) is formed in the valve body (1) for fluid to pass through, the gate plate (2) is connected to the driving member (3), and the driving member (3) is used to drive the gate plate (2) to move up and down and perform a shutoff operation on the valve cavity (11), wherein: Blocking plates (21) are provided at both ends of the gate plate (2), the blocking plates (21) are arranged in a trapezoidal structure, and the upper end surface of the blocking plate (21) is larger than the lower end surface structure; The valve cavity (11) is divided into a feed cavity (12), a blocking cavity (13) and a discharge cavity (14) in sequence along the fluid conveying direction; a sliding groove (4) is provided on the upper wall of the valve body (1); a buffer member (5) is slidably connected in the sliding groove (4); a first end of the buffer member (5) is located in the feed cavity (12), and a second end is located in the blocking cavity (13); During the movement of the gate plate (2), the blocking plate (21) can abut against the second end of the buffer member (5), so that the first end of the buffer member (5) moves in the same direction as the gate plate (2); when the gate plate (2) moves downward, the first end of the buffer member (5) moves downward; When the gate plate (2) moves upward, the first end of the buffer member (5) moves upward; The buffer member (5) comprises a first buffer plate (51) and a second buffer plate (52), and the first buffer plate (51) and the second buffer plate (52) are both provided with a plurality of water outlet holes (6); The first buffer plate (51) and the second buffer plate (52) are hingedly connected via a hinge shaft, and a torsion spring is provided at the hinge between the first buffer plate (51) and the second buffer plate (52); The lower wall of the valve body (1) is provided with a limiting groove (15), and a linkage plate (16) is slidably connected to the lower wall of the valve body (1), and one end of the linkage plate (16) is arranged in linkage with the lower end of the blocking plate (21); When the blocking plate (21) pushes the linkage plate (16) to move in the direction of the limiting groove (15), the linkage plate (16) pushes the first buffer plate (51) to rotate; During the movement of the gate plate (2), there are at least three positional relationships between the first buffer plate (51) and the second buffer plate (52): S1, when the gate plate (2) is in a blocked state, the first buffer plate (51) and the second buffer plate (52) are in a first state; S2, when the gate plate (2) is in an initially opened state, the first buffer plate (51) and the second buffer plate (52) are in a second state; S3, when the gate plate (2) is gradually opened in the S2 state, and until the first buffer plate (51) enters the sliding groove (4), the first buffer plate (51) and the second buffer plate (52) are in a third state.

2. A gate valve according to claim 1, characterized in that: The cross section of the limiting groove (15) is arranged in a triangular structure, and the groove depth of the limiting groove (15) at one end away from the linkage plate (16) is greater than the groove depth at one end close to the linkage plate (16).

3. A gate valve according to claim 1, characterized in that: When the first buffer plate (51) and the second buffer plate (52) are in a first state, the linkage plate (16) pushes the first buffer plate (51) to abut against the groove wall of the limiting groove (15), and at this time the torsion spring is in an uncompressed state.

4. A gate valve according to claim 1, characterized in that: When the first buffer plate (51) and the second buffer plate (52) are in the second state, the fluid pushes the first buffer plate (51) to twist in the direction of the gate plate (2), and at this time, the water outlet hole (6) on the first buffer plate (51) is arranged obliquely upward; The water outlet hole (6) on the second buffer plate (52) is arranged obliquely downward.

5. A gate valve according to claim 1, characterized in that: When one end of the first buffer plate (51) close to the second buffer plate (52) enters the sliding groove (4), the water outlet hole (6) on the second buffer plate (52) is arranged obliquely downward.

6. A gate valve according to claim 1, characterized in that: The buffer component (5) also includes a linkage portion (53) and a return spring, and the linkage portion (53) is slidably connected to the sliding groove (4) via the return spring.

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