Rotary gate valve

Abstract

The invention relates to a rotary gate valve. The rotary gate valve comprises a valve body, blades and a driving part, the valve body comprises an upper valve plate and a lower valve plate which are oppositely arranged in the first direction and provided with a gap, the valve body is provided with a fluid channel arranged in the first direction in a penetrating mode, and the first direction is the flowing direction of fluid in the valve. The blades are located in a gap between the upper valve plate and the lower valve plate in the first direction. The first area of the blade is driven to seal the fluid channel or is driven to avoid the fluid channel; the driving part comprises a valve rod, a shaft sleeve and an execution piece; the valve rod is arranged in the area, outside the fluid channel, of the valve body in a penetrating mode in the first direction, the executing piece drives the valve rod to rotate, and the shaft sleeve is arranged on the periphery of the valve rod in a sleeving mode and connected with the area, outside the first area, of the blade. The blade position and the opening mode are changed, the blade opening and closing levelness is improved, and the fluid local loss amount is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of gate valves, in particular to a rotary gate valve. Background Art

[0002] The gate valve, also known as the knife gate valve, opens and closes the gate to make the round mouth on the gate completely separate and match the diameter; the gate valve is widely used in natural gas pipeline control, chemical industry, water treatment, food, pharmaceutical and other industries due to its strong flow characteristics and not easy to clog. In the process exhaust system, with the development and progress of manufacturing technology, the precision requirements for valve use and control are constantly increasing; the existing valve structure can only simply control the opening and closing, and for the rotary gate valve, the circular motion of the gate blade is usually used to control the opening and closing, so there is a partial obstruction near the blade shaft in the open state, causing local loss and hindering the flow of the medium there. Summary of the invention

[0003] To this end, the technical problem to be solved by the present invention is to overcome the technical difficulty that the medium flow is blocked in some areas due to the fixed position of the blades and the switching mode of the rotary gate valve in the prior art, and to provide a rotary gate valve that changes the blade position and opening mode to reduce fluid loss.

[0004] In order to solve the above technical problems, the present invention provides a rotary gate valve, which comprises:

[0005] A valve body, the valve body comprising an upper valve plate and a lower valve plate which are arranged opposite to each other in a first direction and have a gap therebetween, the valve body having a fluid passage which is arranged through along the first direction, the first direction being set as a flow direction of the fluid in the valve;

[0006] a blade, wherein the blade is located in the gap between the upper valve plate and the lower valve plate in the first direction; a first region of the blade is driven to close the fluid channel or is driven to form an avoidance in the fluid channel;

[0007] The driving part includes a valve stem, a shaft sleeve and an actuator; the valve stem is penetrated through the valve body in an area outside the fluid channel along a first direction, the actuator drives the valve stem to rotate, and the shaft sleeve is sleeved on the outer periphery of the valve stem and connected to the blade in an area outside the first area.

[0008] In one embodiment of the present invention, the upper valve plate has a first through hole connected to the fluid channel, the lower valve plate has a second through hole connected to the fluid channel, and the aperture of the first through hole is larger than the aperture of the second through hole; the valve body also includes a sealing member, which fills the radial gap between the first through hole of the upper valve plate and the second through hole of the lower valve plate and is arranged around the fluid channel.

[0009] In one embodiment of the present invention, a slope is provided on a side of the sealing member facing away from the fluid channel in the radial direction, and an end of the slope close to the lower valve plate in the extending direction is inclined toward the direction close to the fluid channel.

[0010] In one embodiment of the present invention, the valve body further includes a first flange and a second flange, the first flange being located on a side of the upper valve plate away from the gap and being arranged around the first through hole; the second flange being fixed to the top of the first flange, the second flange including a main body and a collar; the collar, the main body and the first flange form a receiving groove, and at least a portion of the sealing member is located in the receiving groove.

[0011] In one embodiment of the present invention, the valve body further includes an elastic portion, the elastic portion is located inside the accommodating groove, and the elastic portion abuts against the sealing member along the first direction.

[0012] In one embodiment of the present invention, the elastic portion is configured as an annular structure, or the elastic portion has at least four groups and is spaced apart around the bottom of the accommodating groove.

[0013] In one embodiment of the present invention, the elastic portion is made of foamed silicone.

[0014] In one embodiment of the present invention, the upper valve plate also has a third through hole connected to the gap; the first area of ​​the blade is configured to be arranged opposite to the third through hole in a first direction when the fluid channel forms an avoidance; and an observation window is also arranged around the opening of the third through hole.

[0015] In one embodiment of the present invention, the actuator includes two groups of cylinders arranged parallel to each other in the first direction, and the cylinders are respectively located on the side of the upper valve plate and the lower valve plate away from the gap, one end of the two groups of cylinders are respectively fixed to the valve body through mounting seats, and the other ends of the two groups of cylinders are respectively connected to the two ends of the valve stem in the extension direction.

[0016] In one embodiment of the present invention, a group of linkage parts is provided between each group of the cylinders and the valve stems, and the linkage parts are sleeved on the valve stems and rotatably connected to the cylinders.

[0017] The above technical solution of the present invention has the following beneficial effects compared with the prior art:

[0018] The rotary gate valve of the present invention improves the position and opening mode of the blades, thereby increasing the horizontality of the blade switches, reducing the obstruction of medium flow, and reducing the local loss of the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

[0020] Figure 1 It is a structural schematic diagram of a rotary gate valve in a preferred embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the valve body in a preferred embodiment of the present invention;

[0022] Figure 3 is an isometric cross-sectional view of a valve body in a preferred embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the coordination between the elastic part and the sealing member in the valve body in a preferred embodiment of the present invention;

[0024] Figure 5 A schematic diagram of a first through hole, a second through hole and a third through hole in a preferred embodiment of the present invention;

[0025] Figure 6 It is a structural schematic diagram of a gasket in a preferred embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the blades and the driving part in the preferred embodiment of the present invention;

[0027] Figure 8 Schematic diagram of the structure of the blade in the preferred embodiment of the present invention.

[0028] Explanation of the reference numerals in the specification: 1. valve body; 11. upper valve plate; 12. lower valve plate; 13. gasket; 1301. first gasket; 1302. second gasket; 1303. third gasket; 14. first fastener; 15. sealing member; 1501. inclined surface; 16. first flange; 17. second flange; 1701. main body; 1702. collar; 18. third flange; 19. second fastener; 2. blade; 21. first region; 22. second region; 3. driving member; 31. valve stem; 32. bushing; 33. cylinder; 34. linkage member; 41. first through hole; 42. second through hole; 43. third through hole; 5. accommodating groove; 6. elastic portion; 7. observation window. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0030] Example

[0031] Reference Figures 1 to 8 As shown, the present invention provides a rotary gate valve, which includes a valve body 1, a blade 2 and a driving part 3. Compared with the existing rotary gate valve, the rotary gate valve of the present invention improves the switching level of the blade 2 and reduces the loss of fluid in the opening and closing process of the valve by adjusting the blade shape and the blade opening method.

[0032] Specifically, refer to Figure 5 As shown, the valve body 1 has a fluid passage arranged through it, and the flow direction of the fluid in the fluid passage when flowing through the valve is set to a first direction. The valve body 1 includes an upper valve plate 11 and a lower valve plate 12 arranged opposite to each other in the first direction, and the upper valve plate 11 and the lower valve plate 12 also have a gap in the first direction.

[0033] Further, refer to Figure 3 and Figure 6 As shown, the valve body 1 also includes a gasket 13, which surrounds the outer edge of the valve body 1 and is located in the gap between the upper valve plate 11 and the lower valve plate 12; the gasket 13 supports the upper valve plate 11 and the lower valve plate 12 respectively in the first direction; preferably, the gasket 13 includes a first gasket 1301, a second gasket 1302 and a third gasket 1303 which are stacked in sequence; the first gasket 1301 is tightly against a side surface of the upper valve plate 11 close to the gap in the first direction, the third gasket 1303 is tightly against a side surface of the lower valve plate 12 close to the gap in the first direction, and the second gasket 1302 is set as a flange gasket and is located between the first gasket 1301 and the third gasket 1303.

[0034] Continue, refer to Figure 4 As shown, a first mounting hole is provided in the area where the upper valve plate 11, the first gasket 1301, the second gasket 1302, the third gasket 1303 and the lower valve plate 12 are stacked, and a first mounting hole is provided through the first direction; the valve body 1 also includes a first fastener 14, the first mounting holes are arranged at intervals on the outer edge of the valve body 1, and the first fastener 14 is passed through the first mounting hole and fixed.

[0035] Further, refer to Figure 5 As shown, the upper valve plate 11 has a first through hole 41 connected to the fluid channel, and the lower valve plate 12 has a second through hole 42 connected to the fluid channel; the first through hole 41 and the second through hole 42 are coaxially arranged, and the aperture of the first through hole 41 is larger than the aperture of the second through hole 42. The valve body 1 also includes a sealing member 15, which is arranged around the fluid channel and fills the radial gap between the first through hole 41 and the second through hole 42 to prevent the fluid medium from overflowing and maintain the air tightness of the valve.

[0036] Continue, refer to Figure 2 and Figure 3 As shown, the valve body 1 also includes a first flange 16, a second flange 17 and a third flange 18, and is fixed in the first direction by a second fastener 19; the first flange 16 is arranged around the first through hole 41 in close contact with the upper valve plate 11, and is located on the side of the upper valve plate 11 away from the first gasket 1301 and the gap; the third flange 18 is arranged around the second through hole 42 in close contact with the lower valve plate 12, and is located on the side of the lower valve plate 12 away from the third gasket 1303 and the gap; the second flange 17 includes a main body 1701 and a collar 1702, the main body 1701 is fixed to the top of the first flange 16, the collar 1702 is located on the side of the main body 1701 close to the fluid channel in the radial direction, and the collar 1702 extends along the first direction.

[0037] Continue, refer to Figure 3 As shown, the collar 1702 of the second flange 17, the main body 1701 of the second flange 17, and the end of the first flange 16 together form a receiving groove 5; the main body 1701 of the second flange 17 serves as the bottom wall of the receiving groove 5, and the collar 1702 and the end of the first flange 16 serve as the side walls of the receiving groove 5. At least part of the sealing member 15 is located in the receiving groove 5, and the collar 1702 can limit the position of the sealing member 15 in the radial direction. When the valve is closed, the bottom of the sealing member 15 is supported on the top surface of the lower valve plate 12 at the opening of the second through hole 42, and the outer peripheral surface of the sealing member 15 abuts against the hole wall of the first through hole 41 of the upper valve plate 11, and abuts against the end of the first flange 16 for forming the receiving groove 5.

[0038] Specifically, refer to Figure 1 , Figure 7 and Figure 8 As shown, the rotary gate valve further includes a blade 2; the blade 2 is driven to rotate by the driving unit 3; the blade 2 is arranged parallel to the upper valve plate 11 and the lower valve plate 12, and is located in the gap between the upper valve plate 11 and the lower valve plate 12 in the first direction. When the blade 2 is driven to rotate to open the valve, the first area 21 of the blade 2 forms a avoidance at the fluid channel; when the blade 2 is driven to rotate to close the valve, the first area 21 of the blade 2 is used to close the fluid channel.

[0039] Furthermore, the driving part 3 is connected to the second area 22 of the blade 2, which is located outside the first area 21 of the blade 2. In the embodiment of the present invention, the area of ​​the blade 2 used to control the valve opening is independently set from the opening position, so that the first area 21 of the blade 2 can be completely closed and separated from the fluid channel, and its side will not be blocked, thereby avoiding fluid flow obstruction or local loss.

[0040] It should be noted that, refer to Figure 3 As shown, when the blade 2 is driven to rotate in the valve body 1, it is located in the gap between the upper valve plate 11 and the lower valve plate 12, and further, it is located between the seal 15 and the lower valve plate 12; therefore, when the blade 2 rotates to open the valve, the blade 2 is pulled out from between the seal 15 and the lower valve plate 12; when the blade 2 rotates to close the valve, the blade 2 is inserted from between the seal 15 and the lower valve plate 12. In a preferred embodiment of the present invention, the seal 15 is provided with an inclined surface 1501 on the side away from the fluid channel in the radial direction, and the end of the inclined surface 1501 in the extending direction close to the upper valve plate 11 is inclined in the direction away from the fluid channel, and the end of the inclined surface 1501 in the extending direction close to the lower valve plate 12 is inclined in the direction close to the fluid channel; the inclined surface direction facilitates the insertion of the blade 2, reducing the difficulty of opening and closing the valve.

[0041] Furthermore, the valve body 1 further includes an elastic portion 6, which is located inside the accommodating groove 5 and abuts against the top surface of the sealing member 15 located inside the accommodating groove 5 along a first direction. When the blade 2 is pulled out of the valve to open, the elastic portion 6 can push the sealing member 15 to abut against the top surface of the lower valve plate 12, so that the side wall of the fluid channel remains sealed to prevent fluid from overflowing or leaking; in addition, compared with achieving a sealing effect when the valve is opened by the elasticity of the sealing member 15 itself, pushing the sealing member 15 to abut against the elastic member 6 can prevent the sealing member 15 from excessive fatigue and aging, and the sealing effect is better.

[0042] Next, in some embodiments, the elastic part 6 can be set as an annular structure, which is arranged around the bottom wall of the receiving groove 5; in a preferred embodiment of the present invention, the elastic part 6 is set as a trapezoidal block, whose wide end abuts the bottom wall of the receiving groove 5, and whose narrow end abuts the sealing member 15 to apply force; the elastic part 6 has at least four groups and is arranged at equal intervals on the bottom wall of the receiving groove 5; when the elastic part 6 is set as a trapezoidal block, the number of the elastic part 6 can be determined as multiple groups according to the actual shape and size of the sealing member 15, but is not limited thereto. Preferably, the material of the elastic part 6 is set as foamed silicone, which has good elasticity, resilience and tensile strength, and can recover quickly after being acted upon by external force.

[0043] Specifically, refer to Figure 7As shown, the driving part 3 includes a valve stem 31, a sleeve 32 and an actuator; the valve stem 31 is inserted into the area of ​​the valve body 1 outside the fluid channel along a first direction, the sleeve 32 is sleeved on the outer periphery of the valve stem 31 and is located in the middle of the valve stem 31 along the first direction, and the second area 22 of the blade 2 is sleeved on the outside of the sleeve 32.

[0044] Further, the actuator includes two groups of cylinders 33 arranged parallel to each other in the first direction, the cylinders 33 are respectively located on the side of the upper valve plate 11 and the lower valve plate 12 away from the gap, one end of the two groups of cylinders 33 are respectively fixed to the valve body 1 through a mounting seat, and the other ends of the two groups of cylinders 33 are respectively connected to the two ends of the extension direction of the valve stem 31; the two groups of cylinders 33 can be driven synchronously, thereby controlling the valve stem 31 to rotate evenly, and cooperate with the shaft sleeve 32 to drive the blade 2 to rotate. A group of linkage members 34 is arranged between each group of cylinders 33 and the valve stem 31, and the linkage member 34 is arranged as an arc-shaped bent plate, one end of which is sleeved on the end of the valve stem 31, and the other end is rotatably connected to the cylinder 33.

[0045] Specifically, refer to Figure 1 and Figure 5 As shown, the upper valve plate 11 also has a third through hole 43 connected to the gap; the first area 21 of the blade 2 is configured to be arranged opposite to the third through hole 43 in the first direction when the fluid channel forms an avoidance; the opening of the third through hole 43 is also surrounded by an observation window 7, through which the internal situation of the valve body 1 and the opening and closing status of the valve can be observed.

[0046] The working principle of the rotary gate valve described in the present invention is as follows:

[0047] Through the observation window 7, the rotary gate valve is observed to be in a closed state, and the first area 21 of the blade 2 covers the fluid channel. The actuator is started, and the two groups of cylinders 33 are ventilated at the same time, driving the valve stem 31 to rotate through the linkage 34, and then pushing the blade 2 to rotate through the sleeve 32, and withdrawing from between the seal 15 and the lower valve plate 12. After the blade 2 is withdrawn, the elastic part 6 abuts against the seal 15 and falls to cover the blade position, so that the side wall of the fluid channel remains sealed, and the valve is opened.

[0048] The rotary gate valve is observed to be in an open state through the observation window 7, and the first area 21 of the blade 2 covers the third through hole 43. The actuator is started, and the two groups of cylinders 33 drive the valve stem 31 to rotate in the opposite direction, and the blade 2 abuts against the inclined surface 1501 on the outer periphery of the sealing member 15 to lift it up, and is reinserted into the gap between the sealing member 15 and the lower valve plate 12 to close the valve.

[0049] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A rotary gate valve, characterized in that: include, A valve body, the valve body comprising an upper valve plate and a lower valve plate which are arranged opposite to each other in a first direction and have a gap therebetween, the valve body having a fluid passage which is arranged through along the first direction, the first direction being set as a flow direction of the fluid in the valve; a blade, wherein the blade is located in the gap between the upper valve plate and the lower valve plate in the first direction; a first region of the blade is driven to close the fluid channel or is driven to form an avoidance in the fluid channel; The driving part includes a valve stem, a shaft sleeve and an actuator; the valve stem is penetrated through the valve body in an area outside the fluid channel along a first direction, the actuator drives the valve stem to rotate, and the shaft sleeve is sleeved on the outer periphery of the valve stem and connected to the blade in an area outside the first area.

2. The rotary gate valve according to claim 1, characterized in that: The upper valve plate has a first through hole connected to the fluid channel, and the lower valve plate has a second through hole connected to the fluid channel, and the aperture of the first through hole is larger than the aperture of the second through hole; the valve body also includes a sealing member, which fills the radial gap between the first through hole of the upper valve plate and the second through hole of the lower valve plate and is arranged around the fluid channel.

3. The rotary gate valve according to claim 2, characterized in that: The sealing member is provided with an inclined surface on one side facing away from the fluid passage in the radial direction, and an end of the inclined surface close to the lower valve plate in the extending direction is inclined toward the direction close to the fluid passage.

4. The rotary gate valve according to claim 2, characterized in that: The valve body also includes a first flange and a second flange, the first flange is located on a side of the upper valve plate away from the gap and is arranged around the first through hole; the second flange is fixed to the top of the first flange, and the second flange includes a main body and a collar; the collar, the main body and the first flange form a receiving groove, and at least a partial area of ​​the sealing member is located in the receiving groove.

5. The rotary gate valve according to claim 4, characterized in that: The valve body further includes an elastic portion, the elastic portion is located inside the accommodating groove, and the elastic portion abuts against the sealing member along the first direction.

6. The rotary gate valve according to claim 5, characterized in that: The elastic part is configured as an annular structure, or the elastic part has at least four groups and is spaced around the bottom of the accommodating groove.

7. The rotary gate valve according to claim 5, characterized in that: The elastic part is made of foamed silica gel.

8. The rotary gate valve according to claim 1, characterized in that: The upper valve plate also has a third through hole connected to the gap; the first area of ​​the blade is configured to be arranged opposite to the third through hole in the first direction when the fluid channel forms an avoidance; and an observation window is also arranged around the opening of the third through hole.

9. The rotary gate valve according to claim 1, characterized in that: The actuator includes two groups of cylinders arranged parallel to each other in the first direction, and the cylinders are respectively located on the side of the upper valve plate and the lower valve plate away from the gap. One end of the two groups of cylinders are respectively fixed to the valve body through a mounting seat, and the other ends of the two groups of cylinders are respectively connected to the two ends of the valve stem extension direction.

10. The rotary gate valve according to claim 9, characterized in that: A group of linkage parts is arranged between each group of the cylinders and the valve stems. The linkage parts are sleeved on the valve stems and are rotatably connected with the cylinders.

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