Poppet valve with high sealing performance

Abstract

The utility model relates to a poppet valve with high sealing performance, which comprises a valve seat and a valve plate, a vertical pipeline penetrates into the valve seat from the bottom of the valve seat, a horizontal pipeline penetrates into the valve seat from the side part of the valve seat, the valve plate is arranged in the valve seat in a lifting manner, a valve rod is connected above the valve plate, a cylinder is arranged above the valve rod, and the cylinder is connected with the valve seat. The valve rod is movably connected with a piston rod of the air cylinder through the universal joint ball. The top of the valve rod penetrates out of the top of the valve seat, a sealing pipe is arranged at the contact position of the top of the valve seat and the valve rod, a receding hole for the valve rod to slide is formed in the top of the valve seat, the sealing pipe is fixed to the inner circumferential wall of the receding hole, the inner circumferential wall of the sealing pipe is attached to the outer circumferential wall of the valve rod, and an annular sealing cavity is formed in the inner circumferential wall of the sealing pipe. An air pipe is connected to the sealing pipe, one end of the air pipe is communicated with the sealing cavity, the other end of the air pipe is externally connected with an air source, the air source inflates the sealing cavity through an air pump, and a gap exists between the bottom of the sealing pipe and the valve rod. The lifting valve has the effect of improving the sealing effect of the lifting valve.

Description

Technical Field

[0001] This utility model relates to the field of valves, and in particular to a lift valve with high sealing performance. Background Technology

[0002] A high-sealing-performance lift valve is a type of valve that uses the extension and retraction of a cylinder piston rod to close or open a pipeline.

[0003] In dust removal systems, high-sealing-performance lift valves are typically used on tee pipes. The valve seat is installed between the vertical and horizontal pipes. The vertical pipe enters the valve seat from the bottom, and the horizontal pipe enters the valve seat from the side. The valve plate moves up and down within the valve seat. When the valve plate descends to abut against the top surface of the vertical pipe, it closes the vertical pipe. When the valve plate rises to no longer contact the vertical pipe, it opens the vertical pipe.

[0004] Traditional high-sealing-performance lift valves are mostly single-plate lift structures. There is usually only packing seal between the valve stem and the valve seat, and the contact between the valve plate and the vertical pipe is a surface contact. There is a possibility of gas leakage from the pipe. The overall sealing effect of high-sealing-performance lift valves needs to be improved. Utility Model Content

[0005] In order to improve the sealing effect of a high-sealing-performance lift valve, this application provides a high-sealing-performance lift valve.

[0006] The high-sealing-performance lift valve provided in this application adopts the following technical solution:

[0007] A high-sealing-performance lifting valve includes a valve seat and a valve plate. A vertical pipe enters the valve seat from the bottom and a horizontal pipe enters the valve seat from the side. The valve plate is raised and lowered within the valve seat. A valve stem is connected above the valve plate, and a cylinder is located above the valve stem. The valve stem is movably connected to the piston rod of the cylinder via a universal joint ball.

[0008] The top of the valve stem extends through the top of the valve seat. A sealing tube is provided at the position where the top of the valve seat contacts the valve stem. A clearance hole is opened on the top of the valve seat for the valve stem to slide. The sealing tube is fixed to the inner circumferential wall of the clearance hole. The inner circumferential wall of the sealing tube fits against the outer circumferential wall of the valve stem. An annular sealing chamber is opened on the inner circumferential wall of the sealing tube. An air pipe is connected to the sealing tube. One end of the air pipe communicates with the sealing chamber, and the other end of the air pipe is connected to an external air source. The air source inflates the sealing chamber with air through an air pump. There is a gap between the bottom of the sealing tube and the valve stem.

[0009] Preferably, an annular receiving chamber is formed on the inner peripheral wall of the sealing tube, the receiving chamber is located above the sealing chamber, the receiving chamber is filled with sealing packing, the receiving chamber penetrates the top surface of the sealing tube, a connecting ring is provided on the sealing tube in the direction away from the center, a pressure cap is provided above the sealing packing, the pressure cap has an L-shaped cross section, the vertical part of the pressure cap presses the top of the sealing packing tightly, and the horizontal part of the pressure cap is fixed to the connecting ring by screws.

[0010] Preferably, a sealing assembly is provided between the valve seat base plate and the vertical pipe. The sealing assembly includes a support block, a sealing gasket, and a pressure plate, all of which are annular. The support block has an L-shaped cross-section. The bottom surface of the horizontal portion of the support block is fixedly connected to the top surface of the valve seat base plate. The inner peripheral wall of the vertical portion of the support block is in contact with the outer peripheral wall of the vertical pipe. The sealing gasket has an L-shaped cross-section. The pressure plate has a Z-shaped cross-section. The upper horizontal portion of the pressure plate presses onto the horizontal portion of the sealing gasket. The inner peripheral wall of the vertical portion of the pressure plate is in contact with the outer peripheral wall of the vertical portion of the support block. The lower horizontal portion of the pressure plate is fixed to the horizontal portion of the support block by screws.

[0011] The diameter of the valve plate is larger than the outer diameter of the vertical pipe. The top surface of the vertical part of the sealing gasket is flush with the top surface of the vertical pipe, and the top surface of the vertical part of the sealing gasket is interference-fitted with the bottom surface of the valve plate.

[0012] Preferably, a connecting frame is fixedly connected to the bottom of the cylinder piston rod. The connecting frame is fixedly connected to the ball part of the universal joint ball through a connecting pin. The connecting pin passes through both the ball of the universal joint ball and the connecting frame. The connecting pin is fixedly connected to both the ball of the universal joint ball and the connecting frame. The valve stem is fixedly connected to the bearing part of the universal joint ball through a connecting rod.

[0013] Preferably, a positioning rod is provided on the inner bottom wall of the valve seat, and the two ends of the positioning rod are fixedly connected to the inner wall of the valve seat. A positioning plate is fixedly connected to the outer periphery of the valve plate, and a positioning hole is provided on the positioning plate for the positioning rod to pass through.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] 1. The valve stem and valve seat are double-sealed by air seal and sealing packing, which improves the sealing performance between the valve stem and valve seat. The valve plate and vertical pipe are sealed by sealing gasket, which improves the sealing performance between the valve plate and vertical pipe. This improves the overall sealing effect of the high-sealing performance booster valve.

[0016] 2. The use of the positioning rod and the positioning plate together prevents the valve plate from rotating during the lifting and lowering process, thus improving the stability of the valve plate movement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a high-sealing-performance lift valve in an embodiment of this application.

[0018] Figure 2 This is a schematic diagram illustrating the connection between the valve stem and the cylinder piston rod via a universal joint ball in an embodiment of this application.

[0019] Figure 3 This is used to illustrate the embodiments of this application. Figure 1 A magnified structural diagram of point A in the middle.

[0020] Figure 4 This is used to illustrate the embodiments of this application. Figure 1 A magnified structural diagram at point B in the middle.

[0021] Explanation of reference numerals in the attached drawings: 1. Vertical pipe; 2. Horizontal pipe; 3. Valve seat; 31. Positioning rod; 4. Valve plate; 41. Positioning plate; 5. Valve stem; 51. Connecting rod; 6. Cylinder; 61. Mounting bracket; 62. Connecting bracket; 63. Connecting bolt; 7. Universal joint ball; 71. Ball; 72. Bearing; 8. Sealing pipe; 81. Sealing chamber; 82. Air pipe; 83. Receiving chamber; 84. Connecting ring; 85. Gland; 86. Fixing ring; 87. Assembly ring; 9. Sealing assembly; 91. Support block; 92. Sealing gasket; 93. Pressure plate. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0023] This application discloses a lift valve with high sealing performance.

[0024] Reference Figure 1-4 The high-sealing-performance lift valve includes a valve seat 3 and a valve plate 4. A vertical pipe enters the valve seat 3 from the bottom, and a horizontal pipe 2 enters the valve seat 3 from the side. The valve plate 4 is raised and lowered within the valve seat 3. A valve stem 5 is connected to the top of the valve plate 4, and a cylinder 6 is installed above the valve stem 5. A mounting bracket 61 for mounting the cylinder 6 is provided on the top surface of the valve seat 3. The cylinder body of the cylinder 6 is mounted on the mounting bracket 61, and the piston rod of the cylinder 6 passes through the mounting bracket 61 and is slidably connected to the mounting bracket 61.

[0025] A clearance hole is provided at the top of the valve seat 3 for the valve stem 5 to slide. The valve stem 5 is movably connected to the piston rod of the cylinder 6 via a universal joint ball 7. A connecting bracket 62 is fixedly connected to the bottom of the piston rod of the cylinder 6. The connecting bracket 62 is fixedly connected to the ball body 71 of the universal joint ball 7 via a connecting pin 63. The connecting pin 63 passes through both the ball body 71 of the universal joint ball 7 and the connecting bracket 62, and is fixedly connected to both the ball body 71 of the universal joint ball 7 and the connecting bracket 62. The valve stem 5 is fixedly connected to the bearing 72 of the universal joint ball 7 via the connecting rod 63. Because the ball body 71 of the universal joint ball 7 is movably connected to the bearing 72, the valve stem 5 can adapt to the clearance hole of the valve seat 3, improving the smoothness of the valve stem 5's movement.

[0026] The top of the valve stem 5 protrudes from the top of the valve seat 3. A sealing tube 8 is provided at the position where the top of the valve seat 3 contacts the valve stem 5. The sealing tube 8 is fixed to the inner circumferential wall of the relief hole. The inner circumferential wall of the sealing tube 8 fits against the outer circumferential wall of the valve stem 5. An annular sealing chamber 81 is formed on the inner circumferential wall of the sealing tube 8. An air pipe 82 is connected to the sealing tube 8. One end of the air pipe 82 is connected to the sealing chamber 81, and the other end of the air pipe 82 protrudes from the mounting bracket 61 and is connected to an external air source. The air source fills the sealing chamber 81 with air through an air pump, thereby creating an air seal between the sealing tube 8 and the valve stem 5. There is a gap between the bottom of the sealing tube 8 and the valve stem 5, allowing gas to enter the valve body from the bottom of the sealing tube 8 without leakage.

[0027] An annular receiving chamber 83 is provided on the inner peripheral wall of the sealing tube 8. The receiving chamber 83 is located above the sealing chamber 81. Sealing packing is provided in the receiving chamber 83. The receiving chamber 83 penetrates the top surface of the sealing tube 8. A connecting ring 84 is integrally formed on the sealing tube 8 in the direction away from the center. A pressure cap 85 is provided above the sealing packing. The pressure cap 85 has an L-shaped cross section. The vertical part of the pressure cap 85 presses the top of the sealing packing tightly. The horizontal part of the pressure cap 85 is fixed to the connecting ring 84 by screws.

[0028] The valve stem 5 and valve seat 3 are further sealed by sealing packing. The air seal and sealing packing provide a double seal between the valve stem 5 and valve seat 3, which greatly improves the sealing performance between the valve stem 5 and valve seat 3.

[0029] The outer peripheral wall of the sealing tube 8 is integrally formed with a fixing ring 86, and the top surface of the valve seat 1 is fixedly connected with an assembly ring 87. The fixing ring 86 is fixed to the assembly ring 87 by screws.

[0030] A sealing assembly 9 is installed between the valve seat 3 base plate and the vertical pipe. The sealing assembly 9 includes a ring-shaped support block 91, a sealing gasket 92, and a pressure plate 93. The support block 91 has an L-shaped cross-section. The bottom surface of the horizontal part of the support block 91 is fixedly connected to the top surface of the valve seat 3 base plate. The inner circumferential wall of the vertical part of the support block 91 fits against the outer circumferential wall of the vertical pipe. The sealing gasket 92 has an L-shaped cross-section, and the pressure plate 93 has a Z-shaped cross-section. The upper horizontal part of the pressure plate 93 presses onto the horizontal part of the sealing gasket 92. The inner circumferential wall of the vertical part of the pressure plate 93 fits against the outer circumferential wall of the vertical part of the support block 91. The lower horizontal part of the pressure plate 93 is fixed to the horizontal part of the support block 91 by screws. The diameter of the valve plate 4 is larger than the outer diameter of the vertical pipe. The top surface of the vertical part of the sealing gasket 92 is flush with the top surface of the vertical pipe, and the top surface of the vertical part of the sealing gasket 92 is interference-fitted with the bottom surface of the valve plate 4. The sealing gasket 92 is used to seal the valve plate 4 and the vertical pipe, thereby improving the sealing performance between the valve plate 4 and the vertical pipe.

[0031] The above-mentioned sealing structure seals the valve stem 5 and valve seat 3, and the valve plate 4 and vertical pipe, preventing gas leakage and improving the overall sealing effect of the high-sealing performance booster valve.

[0032] A positioning rod 31 is provided on the inner bottom wall of the valve seat 3. The two ends of the positioning rod 31 are fixedly connected to the inner wall of the valve seat 3. A positioning plate 41 is fixedly connected to the outer periphery of the valve plate 4. The positioning plate 41 has a positioning hole for the positioning rod 31 to pass through. When the valve plate 4 is raised or lowered, the positioning rod 31 slides in the positioning hole to prevent the valve plate 4 from rotating during the raising and lowering process, thereby improving the stability of the valve plate 4 movement.

[0033] The implementation principle of a high-sealing-performance lift valve in this application embodiment is as follows:

[0034] The piston rod of cylinder 6 extends, causing valve plate 4 to descend and abut against the top surface of vertical pipe 1, thereby closing the vertical pipe;

[0035] The piston rod of cylinder 6 retracts, causing valve plate 4 to rise so that it no longer contacts vertical pipe 1, thereby opening vertical pipe.

[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lifting valve with high sealing performance, characterized in that: Includes a valve seat (3) and a valve plate (4). A vertical pipe passes through the bottom of the valve seat (3) and enters the valve seat (3). A horizontal pipe (2) passes through the side of the valve seat (3) and enters the valve seat (3). The valve plate (4) is raised and lowered inside the valve seat (3). A valve stem (5) is connected above the valve plate (4). A cylinder (6) is provided above the valve stem (5). The valve stem (5) is movably connected to the piston rod of the cylinder (6) through a universal joint ball (7). The top of the valve stem (5) extends through the top of the valve seat (3). A sealing tube (8) is provided at the position where the top of the valve seat (3) contacts the valve stem (5). A clearance hole for the valve stem (5) to slide is opened at the top of the valve seat (3). The sealing tube (8) is fixed to the inner circumferential wall of the clearance hole. The inner circumferential wall of the sealing tube (8) is in contact with the outer circumferential wall of the valve stem (5). An annular sealing chamber (81) is opened on the inner circumferential wall of the sealing tube (8). An air pipe (82) is connected to the sealing tube (8). One end of the air pipe (82) is connected to the sealing chamber (81). The other end of the air pipe (82) is connected to an external air source. The air source is filled into the sealing chamber (81) by an air pump. There is a gap between the bottom of the sealing tube (8) and the valve stem (5).

2. The high-sealing-performance lift valve according to claim 1, characterized in that: The inner circumferential wall of the sealing tube (8) is provided with an annular receiving chamber (83), the receiving chamber (83) is located above the sealing chamber (81), the receiving chamber (83) is provided with sealing packing, the receiving chamber (83) penetrates the top surface of the sealing tube (8), the sealing tube (8) is provided with a connecting ring (84) facing away from the center, a pressure cap (85) is provided above the sealing packing, the pressure cap (85) has an L-shaped cross section, the vertical part of the pressure cap (85) presses the top of the sealing packing tightly, and the horizontal part of the pressure cap (85) is fixed to the connecting ring (84) by screws.

3. The high-sealing-performance lift valve according to claim 1, characterized in that: A sealing assembly (9) is provided between the bottom plate of the valve seat (3) and the vertical pipe. The sealing assembly (9) includes a support block (91) that is annular, a sealing gasket (92), and a pressure plate (93). The support block (91) has an L-shaped cross section. The bottom surface of the horizontal part of the support block (91) is fixedly connected to the top surface of the bottom plate of the valve seat (3). The inner peripheral wall of the vertical part of the support block (91) is in contact with the outer peripheral wall of the vertical pipe. The sealing gasket (92) has an L-shaped cross section. The pressure plate (93) has a Z-shaped cross section. The upper horizontal part of the pressure plate (93) is pressed on the horizontal part of the sealing gasket (92). The inner peripheral wall of the vertical part of the pressure plate (93) is in contact with the outer peripheral wall of the vertical part of the support block (91). The lower horizontal part of the pressure plate (93) is fixed to the horizontal part of the support block (91) by screws. The diameter of the valve plate (4) is larger than the outer diameter of the vertical pipe. The top surface of the vertical part of the sealing gasket (92) is flush with the top surface of the vertical pipe. The top surface of the vertical part of the sealing gasket (92) is interference-fitted with the bottom surface of the valve plate (4).

4. The high-sealing-performance lift valve according to claim 1, characterized in that: The bottom of the piston rod of the cylinder (6) is fixedly connected to a connecting frame (62). The connecting frame (62) is fixedly connected to the ball (71) of the universal joint ball (7) by a connecting pin. The connecting pin passes through the ball (71) of the universal joint ball (7) and the connecting frame (62). The connecting pin is fixedly connected to the ball (71) of the universal joint ball (7) and the connecting frame (62). The valve stem (5) is fixedly connected to the bearing (72) of the universal joint ball (7) by a connecting rod (51).

5. The high-sealing-performance lift valve according to claim 1, characterized in that: A positioning rod (31) is provided on the inner bottom wall of the valve seat (3). The two ends of the positioning rod (31) are fixedly connected to the inner wall of the valve seat (3). A positioning plate (41) is fixedly connected to the outer periphery of the valve plate (4). A positioning hole is provided on the positioning plate (41) for the positioning rod (31) to pass through.

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