A soft sealing gate valve

Abstract

The present invention relates to the technical field of gate valves, and discloses a soft-sealed gate valve, comprising a gate valve body, the gate valve body comprising a valve body, a valve cover, a valve stem, a bracket, a valve plate, and a handle, wherein a discharge mechanism is fixedly installed on an outer wall of the valve cover; the discharge mechanism comprises a rotating plate, a connecting component, and a fixing frame, the rotating plate is rotatably connected to the valve stem through a bearing, a mounting plate is fixedly installed on the bottom of the fixing frame, the mounting plate is fixedly connected to the valve cover through bolts, an air cylinder is fixedly installed on the inner side of the fixing frame, a piston is slidably arranged on the inner wall of the air cylinder, when the valve needs to be closed, the valve stem moves downward to drive the valve plate and the rotating plate to move downward, and the valve is gradually closed as the valve plate moves downward, at this time, the rotating plate moves downward to drive the piston rod to move downward, and then drives the piston to move downward, squeezes the air in the air cylinder into the inflation tube, and then squeezes it into the valve stem, and uses air pressure to discharge the fluid between the valve cover and the valve body into the valve body, thereby achieving a discharge effect.

Description

Technical Field

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

[0002] Soft-sealed gate valve, industrial valve, the opening and closing part of the soft-sealed gate valve is the gate, the movement direction of the gate is perpendicular to the direction of the fluid, the gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. However, the existing soft-sealed gate valve still has some shortcomings when used. For example, when the valve plate rises to open the valve, the fluid will enter the valve cover from the gap between the valve body and the valve plate. When the valve plate descends to close the valve, this part of the fluid will still remain in the valve cover. If the valve is not opened for a long time, this part of the fluid will remain in the gap between the valve cover and the valve body for a long time, which is easy to cause corrosion to the valve body and the inside of the valve cover. Summary of the invention

[0003] The object of the present invention is to provide a soft-sealed gate valve to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: a soft-sealed gate valve, comprising a gate valve body, the gate valve body comprising a valve body, a valve cover, a valve stem, a bracket, a valve plate, and a handle, and a drainage mechanism is fixedly installed on the outer wall of the valve cover;

[0005] The discharge mechanism includes a rotating plate, a connecting component, and a fixed frame. The rotating plate is rotatably connected to the valve stem through a bearing. A mounting plate is fixedly installed on the bottom of the fixed frame. The mounting plate is fixedly connected to the valve cover through bolts. An air cylinder is fixedly installed on the inner side of the fixed frame. A piston is slidably provided on the inner wall of the air cylinder. A piston rod is fixedly installed on the top of the piston. The piston rod is fixedly connected to the rotating plate through a connecting component. An inflation pipe and an air intake pipe are connected to the bottom end of the air cylinder. An end of the inflation pipe away from the air cylinder is connected to the inside of the valve cover. A one-way valve is provided at the connection between the inflation pipe, the air intake pipe and the air cylinder.

[0006] Furthermore, two of the connecting components and the fixing frame are provided and are symmetrically distributed about the center of the rotating plate, and a gap is left between the air cylinder and the valve cover.

[0007] Furthermore, the connecting component includes a slot, an upper nut, and a lower nut. The slot is opened on the end of the rotating plate, and the piston rod passes through the slot. The upper nut and the lower nut are threadedly sleeved on the piston rod. The upper nut is above the rotating plate, and the lower nut is below the rotating plate.

[0008] Furthermore, an elastic gasket is provided between the upper nut, the lower nut and the rotating plate, and the diameter of the elastic gasket is larger than the diameter of the slot, and the center of the radius of the slot coincides with the center of the rotating trajectory of the rotating plate.

[0009] Furthermore, a connecting joint is threadedly sleeved at the end of the air inlet pipe, and an air inlet end head is connected to the front end of the connecting joint, and a filter is fixedly installed at the port of the air inlet end head.

[0010] Furthermore, a hand-pull plate is fixedly mounted on the top end of the piston rod, and an outer wall of the hand-pull plate is provided with anti-slip grooves.

[0011] Furthermore, a rotating cylinder is rotatably sleeved on the outer wall of the valve stem, and an integrally formed convex strip is provided on the inner wall of the rotating cylinder. The convex strip is slidably arranged in a slide groove on the outer wall of the valve stem, and the outer wall of the rotating cylinder is rotatably connected to a fixed seat through a bearing, and the fixed seat is fixedly installed on the top of the bracket, and a gear 1 is fixedly installed on the outer wall of the rotating cylinder, and the gear 1 is meshed with a gear 2, and a rotating shaft 1 is fixedly installed on the inner wall of the gear 2, and a motor is fixedly installed on the top of the rotating shaft 1.

[0012] Furthermore, a mounting frame is fixedly installed on the outer wall of the bracket, a shell is fixedly installed on the top of the mounting frame, the shell covers gear one, gear two, shaft one, and the motor, and the top of the motor is fixedly connected to the top inner wall of the shell.

[0013] Furthermore, the outer wall of the gear one is meshed with the gear three, the inner wall of the gear three is fixedly mounted with the rotating shaft two, and the top end of the rotating shaft two passes through the top inner wall of the outer shell through a bearing.

[0014] Furthermore, a turning handle is fixedly installed on the top of the rotating shaft 2, and the gear 3 and the gear 2 are symmetrically distributed front and back with respect to the gear 1, and the specifications of the gear 3, the gear 2 and the gear 1 are the same.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When the valve needs to be closed, the valve stem moves downward to drive the valve plate and the rotating plate downward. As the valve plate moves downward, the valve gradually closes. At this time, the rotating plate moves downward to drive the piston rod downward, and then drives the piston downward, squeezing the air in the cylinder into the inflation tube, and then into the valve stem. The air pressure is used to discharge the fluid between the valve cover and the valve body into the valve body, achieving the effect of drainage;

[0017] 2. Because the inner diameter of the inflation tube is much smaller than the diameter of the piston, the pressure of the air squeezed into the inflation tube is increased to ensure that the fluid between the valve body and the valve cover can be squeezed out. A one-way valve is set at the connection between the inflation tube, the air intake pipe and the air cylinder, so that the air can only enter the air cylinder from the air intake pipe, and the air in the air cylinder can only enter the inflation tube;

[0018] 3. The rotating plate and the piston rod are connected in a detachable manner, so that when the gate valve body and the discharge mechanism are inspected and repaired, the valve body and the valve cover can be separated normally, and the fixed frame and other structures can be disassembled. The rotating plate and the piston rod are tightly connected together through the upper and lower nuts set up above and below. When the rotating plate and the piston rod need to be disassembled, only the upper and lower nuts need to be unscrewed;

[0019] 4. The convex strips in the rotating cylinder are used to limit the position between the rotating cylinder and the valve stem, so that the rotation of the rotating cylinder can drive the valve stem to rotate. At the same time, the valve stem can also move up and down relative to the rotating cylinder. The motor drives the rotating shaft 1 to rotate, which in turn drives the gear 2 to rotate. The rotation of the gear 2 drives the gear 1 to rotate, which in turn drives the rotating cylinder to rotate. The rotation of the rotating cylinder drives the valve stem to rotate, and the valve is opened and closed without manual rotation.

[0020] 5. By meshing gear 3 with gear 1, shaft 2 can be rotated to drive gear 3 to rotate, and then drive gear 1 to rotate, which is used to provide a manual rotation method. When power is not supplied, the valve can still be opened and closed normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the gate valve body of the present invention;

[0023] Figure 3 It is a structural schematic diagram of a front cross-sectional view of a gate valve body of the present invention;

[0024] Figure 4 It is a structural schematic diagram of a left side cross-sectional view of the gate valve body of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the drainage mechanism of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the rotating plate and the connecting parts of the present invention;

[0027] Figure 7 It is a structural schematic diagram of a front cross-sectional view of the gas cylinder of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the second embodiment of the present invention;

[0029] Fig. 9 For the present invention Figure 8 A schematic diagram of the structure from the bottom looking up;

[0030] Fig.10 It is a schematic diagram of the structure of the internal structure of the housing of the present invention;

[0031] Fig.11 It is a structural schematic diagram of the exploded view of the rotating cylinder and the valve stem of the present invention.

[0032] In the figure: 1. gate valve body; 101. valve body; 102. valve cover; 103. valve stem; 104. bracket; 105. valve plate; 106. handle; 2. discharge mechanism; 201. rotating plate; 202. air cylinder; 203. piston rod; 204. connecting part; 205. fixing frame; 206. mounting plate; 207. piston; 208. inflation pipe; 209. air inlet pipe; 2010. check valve; 2041. slot; 2042. upper nut; 2043. lower nut; 3. hand pull plate; 4. connecting joint; 5. air inlet end; 6. filter screen; 7. mounting frame; 8. shell; 9. rotating cylinder; 901. convex strip; 10. fixing seat; 11. gear one; 12. gear two; 13. shaft one; 14. motor; 15. gear three; 16. shaft two; 17. turning handle. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Embodiment 1

[0035] See also Figure 1-Figure 7 The present invention provides a technical solution: a soft-sealed gate valve, comprising a gate valve body 1, the gate valve body 1 comprising a valve body 101, a valve cover 102, a valve stem 103, a bracket 104, a valve plate 105, and a handle 106, and a discharge mechanism 2 is fixedly installed on the outer wall of the valve cover 102;

[0036] The discharge mechanism 2 includes a rotating plate 201, a connecting component 204, and a fixing frame 205. The rotating plate 201 is rotatably connected to the valve stem 103 through a bearing. A mounting plate 206 is fixedly installed at the bottom of the fixing frame 205. The mounting plate 206 is fixedly connected to the valve cover 102 through bolts. A gas cylinder 202 is fixedly installed on the inner side of the fixing frame 205. A piston 207 is slidably provided on the inner wall of the gas cylinder 202. A piston rod 203 is fixedly installed on the top of the piston 207. The piston rod 203 is fixedly connected to the rotating plate 201 through the connecting component 204. The bottom end of the gas cylinder 202 is connected to an inflation pipe 2 08, the air inlet pipe 209, the end of the inflation pipe 208 away from the air cylinder 202 is connected to the inside of the valve cover 102, and the connection between the inflation pipe 208, the air inlet pipe 209 and the air cylinder 202 is provided with a one-way valve 2010. The piston rod 203 and the rotating plate 201 are fixedly connected together by the connecting component 204. Because the rotating plate 201 is rotatably connected to the valve stem 103 through the bearing, the valve stem 103 can drive the rotating plate 201 to move up and down synchronously, and the valve stem 103 can continue to rotate relative to the rotating plate 201. When the valve plate 105 rises to open the valve, the valve stem 103 rises. The valve plate 105 is lifted up, so the rotating plate 201 is lifted up, and the lifting of the rotating plate 201 drives the piston rod 203 to lift up, and then drives the piston 207 to rise, and the outside air is sucked into the air cylinder 202 from the air inlet pipe 209. At this time, the fluid will enter the valve stem 103. When the valve needs to be closed, the valve stem 103 moves down to drive the valve plate 105 and the rotating plate 201 to move down. As the valve plate 105 moves down, the valve is gradually closed. At this time, the rotating plate 201 moves down to drive the piston rod 203 to move down, and then drives the piston 207 to move down, squeezing the air in the air cylinder 202 into the inflation pipe 208, and then squeezing the air out of the inflation pipe 208. The piston 207 is inserted into the valve stem 103, and the air pressure is used to discharge the fluid between the valve cover 102 and the valve body 101 into the valve body 101 to achieve the effect of discharge. Because the inner diameter of the inflation tube 208 is much smaller than the diameter of the piston 207, the pressure of the air squeezed into the inflation tube 208 is increased, ensuring that the fluid between the valve body 101 and the valve cover 102 can be squeezed out. A one-way valve 2010 is set at the connection between the inflation tube 208, the air inlet tube 209 and the air cylinder 202, so that the air can only enter the air cylinder 202 from the air inlet tube 209, and the air in the air cylinder 202 can only enter the inflation tube 208;

[0037] Two connecting parts 204 and fixing frames 205 are provided, and are symmetrically distributed about the center of the rotating plate 201. A gap is left between the air cylinder 202 and the valve cover 102. Two connecting parts 204 and fixing frames 205 are provided to install two sets of piston rods 203, air cylinders 202, pistons 207, inflation pipes 208, and air inlet pipes 209, so as to ensure that enough air enters between the valve body 101 and the valve cover 102, thereby completely discharging the fluid between the valve body 101 and the valve cover 102;

[0038] The connecting component 204 includes a slot 2041, an upper nut 2042, and a lower nut 2043. The slot 2041 is provided at the end of the rotating plate 201. The piston rod 203 passes through the slot 2041. The upper nut 2042 and the lower nut 2043 are threadedly sleeved on the piston rod 203. The upper nut 2042 is above the rotating plate 201, and the lower nut 2043 is below the rotating plate 201. The rotating plate 201 and the piston rod 203 are detachably connected, so that when the gate valve body 1 and the discharge mechanism 2 are inspected and repaired, the valve body 101 and the valve cover 102 can be separated normally, and the fixing frame 205 and other structures can be disassembled. The rotating plate 201 and the piston rod 203 are tightly connected together by the upper nut 2042 and the lower nut 2043 arranged above and below. When the rotating plate 201 and the piston rod 203 need to be disassembled, the upper nut 2042 and the lower nut 2043 only need to be unscrewed.

[0039] Elastic washers are arranged between the upper nut 2042, the lower nut 2043 and the rotating plate 201, and the diameter of the elastic washers is larger than the diameter of the slot 2041. The elastic washers can ensure that the upper nut 2042 and the lower nut 2043 can be tightened on the one hand, and can reduce the impact of vibration on the upper nut 2042 and the lower nut 2043 on the other hand. The center of the radius of the slot 2041 coincides with the center of the rotation track of the rotating plate 201, so that when the rotating plate 201 is rotated, the piston rod 203 can just be disengaged from the slot 2041;

[0040] The end of the air inlet pipe 209 is threadedly sleeved with a connecting joint 4, the front end of the connecting joint 4 is connected to an air inlet terminal 5, a filter screen 6 is fixedly installed at the port of the air inlet terminal 5, the connecting joint 4 is provided to connect the air inlet terminal 5 with the air inlet pipe 209, and the filter screen 6 is provided to filter the air entering the air inlet terminal 5, thereby preventing dust and other particles from entering the air inlet pipe 209 and then entering the valve cover 102;

[0041] A hand-pull plate 3 is fixedly installed on the top of the piston rod 203, and the outer wall of the hand-pull plate 3 is provided with anti-slip grooves. When the rotating plate 201 and the piston rod 203 are separated, the piston rod 203 can still be lifted and lowered by pulling the hand-pull plate 3 to achieve discharge.

[0042] Working principle: When in use, the handle 106 is turned to drive the valve stem 103 to rotate, and the valve stem 103 rotates and rises at the same time. When the valve stem 103 rises, it drives the valve plate 105 to rise and open the valve. As the valve stem 103 rises, it drives the rotating plate 201 to rise, and then drives the rotating plate 201 to rise. The rising of the rotating plate 201 drives the piston rod 203 to rise, and then drives the piston 207 to rise, and the outside air is drawn into the air cylinder 202 from the air inlet pipe 209. At this time, the fluid will enter the valve stem 103. When the valve needs to be closed, the valve stem 103 moves downward to drive the valve plate 105 and the rotating plate 201 to move downward. As the valve plate 105 moves downward, the valve is gradually closed. At this time, the rotating plate 201 moves downward to drive the piston rod 203 to move downward, and then drives the piston 207 to move downward, squeezing the air in the air cylinder 202 into the inflation pipe 208, and then squeezed into the valve stem 103, and the air pressure is used to discharge the fluid between the valve cover 102 and the valve body 101 into the valve body 101 to achieve the effect of drainage. When performing maintenance, the upper nut 2042 and the lower nut 2043 can be loosened, and then the rotating plate 201 is rotated to make the piston rod 203 disengage from the slot 2041, and then the valve cover 102, the valve body 101, the valve stem 103 and other structures can be disassembled normally. If it is necessary to clean the inside of the gate valve body 1, it is only necessary to unscrew the connecting joint 4 at the front end of the air inlet pipe 209, and then connect it to the water pipe. At this time, water enters the air cylinder 202 from the air inlet pipe 209, and then enters the inflation pipe 208, and finally sprays from the inflation pipe 208 into the valve body 101 and the valve cover 102 to flush the inside of the gate valve body 1.

[0043] Embodiment 2

[0044] See also Figure 8-Figure 11 The present invention provides a technical solution: a soft-sealed gate valve, comprising a gate valve body 1, the gate valve body 1 comprising a valve body 101, a valve cover 102, a valve stem 103, a bracket 104, a valve plate 105, and a handle 106, and a discharge mechanism 2 is fixedly installed on the outer wall of the valve cover 102;

[0045] The discharge mechanism 2 includes a rotating plate 201, a connecting component 204, and a fixing frame 205. The rotating plate 201 is rotatably connected to the valve stem 103 through a bearing. A mounting plate 206 is fixedly installed at the bottom of the fixing frame 205. The mounting plate 206 is fixedly connected to the valve cover 102 through bolts. A gas cylinder 202 is fixedly installed on the inner side of the fixing frame 205. A piston 207 is slidably provided on the inner wall of the gas cylinder 202. A piston rod 203 is fixedly installed on the top of the piston 207. The piston rod 203 is fixedly connected to the rotating plate 201 through the connecting component 204. The bottom end of the gas cylinder 202 is connected to an inflation pipe 2 08, the air inlet pipe 209, the end of the inflation pipe 208 away from the air cylinder 202 is connected to the inside of the valve cover 102, and the connection between the inflation pipe 208, the air inlet pipe 209 and the air cylinder 202 is provided with a one-way valve 2010. The piston rod 203 and the rotating plate 201 are fixedly connected together by the connecting component 204. Because the rotating plate 201 is rotatably connected to the valve stem 103 through the bearing, the valve stem 103 can drive the rotating plate 201 to move up and down synchronously, and the valve stem 103 can continue to rotate relative to the rotating plate 201. When the valve plate 105 rises to open the valve, the valve stem 103 rises. The valve plate 105 is lifted up, so the rotating plate 201 is lifted up, and the lifting of the rotating plate 201 drives the piston rod 203 to lift up, and then drives the piston 207 to rise, and the outside air is sucked into the air cylinder 202 from the air inlet pipe 209. At this time, the fluid will enter the valve stem 103. When the valve needs to be closed, the valve stem 103 moves down to drive the valve plate 105 and the rotating plate 201 to move down. As the valve plate 105 moves down, the valve is gradually closed. At this time, the rotating plate 201 moves down to drive the piston rod 203 to move down, and then drives the piston 207 to move down, squeezing the air in the air cylinder 202 into the inflation pipe 208, and then squeezing the air out of the inflation pipe 208. The piston 207 is inserted into the valve stem 103, and the air pressure is used to discharge the fluid between the valve cover 102 and the valve body 101 into the valve body 101 to achieve the effect of discharge. Because the inner diameter of the inflation tube 208 is much smaller than the diameter of the piston 207, the pressure of the air squeezed into the inflation tube 208 is increased, ensuring that the fluid between the valve body 101 and the valve cover 102 can be squeezed out. A one-way valve 2010 is set at the connection between the inflation tube 208, the air inlet tube 209 and the air cylinder 202, so that the air can only enter the air cylinder 202 from the air inlet tube 209, and the air in the air cylinder 202 can only enter the inflation tube 208;

[0046] Two connecting parts 204 and fixing frames 205 are provided, and are symmetrically distributed about the center of the rotating plate 201. A gap is left between the air cylinder 202 and the valve cover 102. Two connecting parts 204 and fixing frames 205 are provided to install two sets of piston rods 203, air cylinders 202, pistons 207, inflation pipes 208, and air inlet pipes 209, so as to ensure that enough air enters between the valve body 101 and the valve cover 102, thereby completely discharging the fluid between the valve body 101 and the valve cover 102;

[0047] The connecting component 204 includes a slot 2041, an upper nut 2042, and a lower nut 2043. The slot 2041 is provided at the end of the rotating plate 201. The piston rod 203 passes through the slot 2041. The upper nut 2042 and the lower nut 2043 are threadedly sleeved on the piston rod 203. The upper nut 2042 is located above the rotating plate 201, and the lower nut 2043 is located below the rotating plate 201.

[0048] Elastic gaskets are arranged between the upper nut 2042, the lower nut 2043 and the rotating plate 201, and the diameter of the elastic gasket is larger than the diameter of the slot 2041;

[0049] The end of the air inlet pipe 209 is threadedly sleeved with a connecting joint 4, the front end of the connecting joint 4 is connected to an air inlet terminal 5, and a filter screen 6 is fixedly installed at the port of the air inlet terminal 5;

[0050] A hand-pull plate 3 is fixedly mounted on the top of the piston rod 203, and the outer wall of the hand-pull plate 3 is provided with anti-slip grooves;

[0051] The outer wall of the valve stem 103 is rotatably sleeved with a rotating cylinder 9, and the inner wall of the rotating cylinder 9 is provided with an integrally formed convex strip 901, and the convex strip 901 is slidably arranged in a slide groove on the outer wall of the valve stem 103. The outer wall of the rotating cylinder 9 is rotatably connected with a fixed seat 10 through a bearing, and the fixed seat 10 is fixedly installed on the top of the bracket 104. The outer wall of the rotating cylinder 9 is fixedly installed with a gear 11, and the gear 11 is meshed with a gear 2 12. The inner wall of the gear 2 12 is fixedly installed with a rotating shaft 13, and the top of the rotating shaft 13 is fixedly installed with a motor 14. The fixed seat 10 is provided to rotate the rotating cylinder 9. The limit makes the rotating cylinder 9 rotate relative to the bracket 104. The convex strip 901 in the rotating cylinder 9 limits the rotating cylinder 9 and the valve stem 103, so that the rotation of the rotating cylinder 9 can drive the valve stem 103 to rotate. At the same time, the valve stem 103 can also move up and down relative to the rotating cylinder 9. The motor 14 drives the rotating shaft 13 to rotate, and then drives the gear 2 12 to rotate. The rotation of the gear 2 12 drives the gear 11 to rotate, and then drives the rotating cylinder 9 to rotate. The rotation of the rotating cylinder 9 drives the valve stem 103 to rotate, and the valve is opened and closed without manual rotation.

[0052] The outer wall of the bracket 104 is fixedly mounted with a mounting frame 7, and the top of the mounting frame 7 is fixedly mounted with a housing 8, and the housing 8 covers the gear 1 11, the gear 2 12, the shaft 1 13, and the motor 14, and the top of the motor 14 is fixedly connected to the top inner wall of the housing 8, and the mounting frame 7 is provided to connect the housing 8 and the bracket 104 together, and the housing 8 is provided to cover the exposed gear 1 11, the gear 2 12, the shaft 1 13, the motor 14 and other structures, so that the whole is more beautiful, and the housing 8 is also used to fix the motor 14;

[0053] The outer wall of the gear 11 is meshed with the gear 3 15, and the inner wall of the gear 3 15 is fixedly installed with the rotating shaft 2 16. The top of the rotating shaft 2 16 passes through the top inner wall of the housing 8 through the bearing, and is meshed with the gear 1 11 through the gear 3 15, so that the rotating shaft 2 16 can be rotated to drive the gear 3 15 to rotate, and then drive the gear 1 11 to rotate, which is used to provide a manual rotation method. When the power is not turned on, the valve can still be opened and closed normally;

[0054] A turning handle 17 is fixedly installed on the top of the rotating shaft 2 16. The turning handle 17 makes it easier to rotate the rotating shaft 2 16. The gear 3 15 and the gear 2 12 are symmetrically distributed front and back about the gear 1 11, and the specifications of the gear 3 15, the gear 2 12, and the gear 1 11 are the same, so that the gear 3 15 will not hinder the rotation of the gear 2 12, and the gear 3 15 will not come into contact with the motor 14.

[0055] Working principle: When in use, when it is necessary to rotate the valve stem 103 to open and close the valve, turn on the motor 14 to drive the rotating shaft 13 to rotate, and then drive the gear 2 12 to rotate. The rotation of the gear 2 12 drives the gear 11 to rotate, and then drives the rotating cylinder 9 to rotate. The rotation of the rotating cylinder 9 drives the valve stem 103 to rotate through the convex strip 901. The valve stem 103 rotates and rises at the same time to open and close the valve. When the valve stem 103 rises, it drives the valve plate 105 to rise and open the valve. As the valve stem 103 rises, it drives the rotating plate 201 to rise, and then drives the rotating plate 201 to rise. The rising of the rotating plate 201 drives the piston rod 203 to rise, and then drives the piston 207 to rise, and the outside air is drawn into the air cylinder 202 from the air inlet pipe 209. At this time, the fluid will enter the valve stem 10 3, when the valve needs to be closed, the valve stem 103 moves downward, driving the valve plate 105 and the rotating plate 201 to move downward. As the valve plate 105 moves downward, the valve is gradually closed. At this time, the rotating plate 201 moves downward, driving the piston rod 203 to move downward, and then driving the piston 207 to move downward, squeezing the air in the air cylinder 202 into the inflation tube 208, and then squeezing it into the valve stem 103, and using air pressure to discharge the fluid between the valve cover 102 and the valve body 101 into the valve body 101, so as to achieve the effect of discharge. If the motor 14 is not energized, the turning handle 17 can also be turned to drive the rotating shaft 16 to rotate, and the rotation of the rotating shaft 16 drives the gear three 15 to rotate, and then drives the gear one 11 to rotate. The rotation of the gear one 11 drives the rotating cylinder 9 to rotate, and then drives the valve stem 103 to rotate, and the valve can still be opened and closed.

[0056] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A soft-sealed gate valve, comprising a gate valve body (1), characterized in that: The gate valve body (1) comprises a valve body (101), a valve cover (102), a valve stem (103), a bracket (104), a valve plate (105), and a handle (106); a discharge mechanism (2) is fixedly mounted on the outer wall of the valve cover (102); The discharge mechanism (2) comprises a rotating plate (201), a connecting component (204), and a fixed frame (205); the rotating plate (201) is rotatably connected to the valve stem (103) via a bearing; a mounting plate (206) is fixedly mounted on the bottom of the fixed frame (205); the mounting plate (206) is fixedly connected to the valve cover (102) via bolts; an air cylinder (202) is fixedly mounted on the inner side of the fixed frame (205); a piston (207) is slidably disposed on the inner wall of the air cylinder (202); A piston rod (203) is fixedly mounted on the top of the piston (207); the piston rod (203) is fixedly connected to the rotating plate (201) via a connecting component (204); an air charging pipe (208) and an air intake pipe (209) are connected to the bottom of the air cylinder (202); an end of the air charging pipe (208) away from the air cylinder (202) is connected to the inside of the valve cover (102); and a one-way valve (2010) is provided at the connection between the air charging pipe (208), the air intake pipe (209) and the air cylinder (202); The connecting member (204) and the fixing frame (205) are both provided with two and are symmetrically distributed about the center of the rotating plate (201), and a gap is left between the air cylinder (202) and the valve cover (102); The connecting component (204) comprises a slot (2041), an upper nut (2042), and a lower nut (2043); the slot (2041) is formed on the end of the rotating plate (201); the piston rod (203) passes through the slot (2041); the upper nut (2042) and the lower nut (2043) are threadedly sleeved on the piston rod (203); the upper nut (2042) is located above the rotating plate (201), and the lower nut (2043) is located below the rotating plate (201); An elastic gasket is provided between the upper nut (2042), the lower nut (2043) and the rotating plate (201), and the diameter of the elastic gasket is greater than the diameter of the slot (2041), and the center of the circumferential radius of the slot (2041) coincides with the center of the rotating track of the rotating plate (201).

2. A soft-sealed gate valve according to claim 1, characterized in that: The end of the air intake pipe (209) is threadedly sleeved with a connecting joint (4), the front end of the connecting joint (4) is connected to an air intake end head (5), and a filter screen (6) is fixedly installed at the port of the air intake end head (5).

3. A soft-sealed gate valve according to claim 1, characterized in that: A hand-pull plate (3) is fixedly mounted on the top end of the piston rod (203), and an outer wall of the hand-pull plate (3) is provided with anti-slip grooves.

4. A soft-sealed gate valve according to claim 1, characterized in that: The outer wall of the valve stem (103) is rotatably sleeved with a rotating cylinder (9), the inner wall of the rotating cylinder (9) is provided with an integrally formed convex strip (901), the convex strip (901) is slidably arranged in a slide groove on the outer wall of the valve stem (103), the outer wall of the rotating cylinder (9) is rotatably connected to a fixed seat (10) via a bearing, the fixed seat (10) is fixedly mounted on the top of the bracket (104), the outer wall of the rotating cylinder (9) is fixedly mounted with a gear 1 (11), the gear 1 (11) is meshed with a gear 2 (12), the inner wall of the gear 2 (12) is fixedly mounted with a rotating shaft 1 (13), and the top of the rotating shaft 1 (13) is fixedly mounted with a motor (14).

5. A soft-sealed gate valve according to claim 1, characterized in that: A mounting frame (7) is fixedly mounted on the outer wall of the bracket (104); a housing (8) is fixedly mounted on the top of the mounting frame (7); the housing (8) covers gear 1 (11), gear 2 (12), rotating shaft 1 (13), and the motor (14); and the top of the motor (14) is fixedly connected to the top inner wall of the housing (8).

6. A soft-sealed gate valve according to claim 4, characterized in that: The outer wall of the gear one (11) is meshed with the gear three (15), and the inner wall of the gear three (15) is fixedly mounted with the rotating shaft two (16), and the top end of the rotating shaft two (16) passes through the top inner wall of the housing (8) through a bearing.

7. A soft-sealed gate valve according to claim 6, characterized in that: A turning handle (17) is fixedly mounted on the top of the rotating shaft (16); the gear (15) and the gear (12) are symmetrically distributed front and rearward with respect to the gear (11); and the gear (15), the gear (12) and the gear (11) have the same specifications.

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