A gate valve with good airtightness
By adopting a combined design of the gap sealing part and the sliding sealing part in the plug-in valve, the problem of material overflow caused by the gap of the existing plug-in valve is solved, achieving higher sealing and stable operation.
Patent Information
- Application Number
- CN202421627255.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-07-10
AI Technical Summary
During use, the existing plug-in valves have a gap due to the sliding movement of the gate plate and the gate seat, causing the material to overflow from the sliding hole end of the gate seat, affecting the production progress and on-site environment.
A well-sealed plug-in valve is designed, and the gap at the junction between the valve plate and the valve seat is sealed by combining the gap sealing part and the sliding sealing part through a long tapered sealing strip and a short tapered sealing strip, and sealed by a square sleeve and a bottom sealing ring when the valve plate slides.
Effectively prevent material overflow, ensure the sealing and normal operation of the plug-in valve, and reduce the risk of maintenance frequency and production interruption.
Smart Images
Figure CN222732157U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a plug-in valve device, in particular to a plug-in valve which can prevent materials from overflowing from a gap between a plug-in plate and a device shell, and belongs to the technical field of plug-in valve equipment. Background Art
[0002] There are a large number of pipelines in steel enterprises for transporting materials, among which gate valves are extremely common on-off devices, which can control the on-off of material transportation in pipelines; gate valves are valves in which the gate and valve seat are always in close contact and sealing. The principle is that a circular opening of the same diameter is opened on the gate, and the circular opening on the gate is completely separated from and matched with the diameter by opening and closing the gate, thereby controlling the on-off of materials; in actual use, since the gate slides on the gate seat to achieve the through-hole docking or staggered action, since there is a sliding action, it means that there is a gap between the gate and the sliding hole of the gate seat for the gate to slide. It is found in production that the material in the pipeline will overflow from the end of the sliding hole of the gate seat. Replacement and maintenance will seriously affect the production progress, and the process of material overflow will affect the on-site environment; therefore, a gate valve with good sealing performance is needed, which is required to effectively seal the end of the sliding hole of the gate seat, thereby ensuring the normal operation of the gate valve. Utility Model Content
[0003] The utility model aims to overcome the deficiencies of the prior art and provide a gate valve with good airtightness, which can effectively ensure the sealing of the gate valve and further ensure the smooth operation of the gate valve.
[0004] The problem described in the utility model is solved by the following technical solutions:
[0005] A plug valve with good airtightness comprises a valve seat, a valve plate, a U-shaped seat, a screw, a gap sealing part and a sliding sealing part; a sliding hole is arranged in the valve seat, and the valve plate is slidingly arranged in the sliding hole of the valve seat; a through hole is arranged on the valve seat, and a through hole is also arranged on the valve plate, and the through hole of the valve seat coincides with the through hole of the valve plate; both ends of the through hole of the valve seat are butt-jointed with the pipeline; the U-shaped seat is arranged on the top end surface of the valve seat; a threaded hole is arranged in the center of the U-shaped seat, and the screw passes through the threaded hole in the center of the U-shaped seat, a handle is arranged on the top end of the screw, and the bottom end of the screw is axially connected with the center of the top end surface of the valve plate; the gap sealing part and the sliding sealing part are both arranged on the top end surface of the valve seat, and they are both in close contact with the valve plate.
[0006] The above-mentioned gate valve with good airtightness, the gap sealing part includes a long sealing mechanism and a short sealing mechanism; the number of the long sealing mechanism and the short sealing mechanism are two, and they are both arranged on the top end surface of the valve seat; the two long sealing mechanisms are respectively located on both sides in the thickness direction of the valve plate, and the two short sealing mechanisms are respectively located on both sides in the width direction of the valve plate.
[0007] The above-mentioned gate valve with good airtightness, the long sealing mechanism includes a long conical sealing strip, a long pressure plate, a first guide plate, a long fixed plate and a first electric cylinder; the two ends of the long fixed plate are fixed to the top end surface of the valve seat by a bracket, and the length direction line of the long fixed plate is parallel to the width direction line of the valve plate; the two ends of the long pressure plate are provided with a first guide plate, the two ends of the long fixed plate are provided with a guide hole, and the first guide plate is inserted into the two guide holes; the first electric cylinder is arranged on the long fixed plate, and the end of its piston rod is connected to the long pressure plate; the long conical sealing strip is arranged on the end surface of the long pressure plate away from the long fixed plate, and the long conical sealing strip touches and presses on the junction of the side wall of the wide surface of the valve plate and the top end surface of the valve seat; the length of the long conical sealing strip is the same as the width of the valve plate.
[0008] The above-mentioned plug valve with good airtightness, the short sealing mechanism includes a short conical sealing strip, a short pressure plate, a second guide plate, a short fixed plate and a second electric cylinder; the two ends of the short fixed plate are fixed to the top end surface of the valve seat by a bracket, and the length direction line of the short fixed plate is parallel to the thickness direction line of the valve plate; the two ends of the short pressure plate are provided with a second guide plate, the two ends of the short fixed plate are provided with a guide hole, and the second guide plate is inserted into the two guide holes; the second electric cylinder is arranged on the short fixed plate, and the end of its piston rod is connected to the short pressure plate; the short conical sealing strip is arranged on the end surface of the short pressure plate away from the short fixed plate, and the short conical sealing strip touches and presses on the junction of the narrow side wall of the valve plate and the top end surface of the valve seat; the length of the short conical sealing strip is equal to the thickness of the valve plate.
[0009] The above-mentioned gate valve with good airtightness, the sliding sealing part includes a square sleeve, a bottom sealing ring and a third electric cylinder; the square sleeve is sleeved on the outer wall of the valve plate, and the inner wall of the square sleeve is consistent with the outer wall of the valve plate; the bottom sealing ring is arranged at the bottom end of the square sleeve; the number of the third electric cylinders is four, and they are all arranged on the top end surface of the valve seat, and the four third electric cylinders are respectively located at the four corners of the square sleeve, and the piston rod ends of each third electric cylinder are respectively connected to the four corner tops of the square sleeve.
[0010] The utility model realizes the overlap and staggering of through holes by the sliding of the valve plate on the valve seat, and realizes the connection and closing of the pipeline by the docking and staggering of the through holes of the valve plate and the valve seat; the gap at the junction of the valve plate and the valve seat, which is easy to overflow materials, is effectively sealed by the gap sealing part; in the stage of the sliding of the valve plate, the sliding sealing part is switched to replace the gap sealing part for sealing; the gap sealing part mainly performs sealing when the valve plate is in a stationary state, and the sliding sealing part mainly performs sealing when the valve plate is in a sliding state, thereby providing a sealing effect for the junction gap between the valve plate and the valve seat to the maximum extent. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model after removing the U-shaped seat and the third electric cylinder;
[0012] Figure 2 It is a partial enlarged structural schematic diagram of the utility model A;
[0013] Figure 3 This is a schematic diagram of the three-dimensional structure of the utility model after removing the U-shaped seat;
[0014] Figure 4 It is a partial enlarged structural schematic diagram of the utility model B.
[0015] The list of numbers in the figure is: 1. Valve seat, 2. Valve plate, 3. Long conical sealing strip, 4. Long pressure plate, 5. First guide plate, 6. Long fixed plate, 7. First electric cylinder, 8. Short conical sealing strip, 9. Short pressure plate, 10. Second guide plate, 11. Short fixed plate, 12. Second electric cylinder, 13. Square sleeve, 14. Bottom sealing ring, 15. Third electric cylinder. DETAILED DESCRIPTION
[0016] See also Figure 1 , 2 , 3 and Figure 4 The utility model comprises a valve seat 1, a valve plate 2, a U-shaped seat, a screw, a gap sealing part and a sliding sealing part; a sliding hole is arranged in the valve seat 1, and the valve plate 2 is slidingly arranged in the sliding hole of the valve seat 1; a through hole is arranged on the valve seat 1, and a through hole is also arranged on the valve plate 2, the through hole of the valve seat 1 coincides with the through hole of the valve plate 2, and the pipelines on both sides are connected when the through holes coincide; both ends of the through hole of the valve seat 1 are butt-jointed with the pipeline; the U-shaped seat is arranged on the top surface of the valve seat 1, and the valve seat 1 The outlet end of the sliding hole is located at the top, and the valve plate slides in or out of the valve seat 1 from the end of the sliding hole on the top surface; a threaded hole is provided at the center of the U-shaped seat, and a screw rod passes through the threaded hole in the center of the U-shaped seat, a handle is provided at the top end of the screw rod, and the bottom end of the screw rod is axially connected to the center of the top surface of the valve plate 2; rotating the handle can drive the screw rod to rotate, thereby driving the valve plate 2 to slide, and the gap sealing part and the sliding sealing part are both provided on the top surface of the valve seat 1, and are in close contact with the valve plate 2.
[0017] The gap sealing part includes a long sealing mechanism and a short sealing mechanism; the number of the long sealing mechanism and the short sealing mechanism are both two, and they are both arranged on the top end surface of the valve seat 1; the two long sealing mechanisms are respectively located on both sides of the thickness direction of the valve plate 2, and the long sealing mechanism performs a contact pressure sealing on the gap at the junction of the wide surface of the valve plate 2 and the valve seat; the two short sealing mechanisms are respectively located on both sides of the width direction of the valve plate 2; the short sealing mechanism performs a contact pressure sealing on the gap at the junction of the narrow surface of the valve plate 2 and the valve seat.
[0018] The long sealing mechanism includes a long conical sealing strip 3, a long pressure plate 4, a first guide plate 5, a long fixed plate 6 and a first electric cylinder 7; both ends of the long fixed plate 6 are fixed to the top surface of the valve seat 1 by a bracket, and the length direction line of the long fixed plate 6 is parallel to the width direction line of the valve plate 2; both ends of the long pressure plate 4 are provided with a first guide plate 5, both ends of the long fixed plate 6 are provided with a guide hole, and the first guide plate 5 is inserted into the two guide holes; the first guide plate 5 provides a guide and stabilizing effect for the displacement of the long pressure plate 4; the first electric cylinder 7 is arranged on the long fixed plate 6, and the end of its piston rod is connected to the long pressure plate 4; the first electric cylinder 7 can carry The long pressure plate 4 is moved forward or backward; thereby, the long conical sealing strip 3 on the long pressure plate 4 is driven to seal the gap at the junction of the wide side wall of the valve plate 2 and the top surface of the valve seat 1 to prevent material or dust from overflowing; the long conical sealing strip 3 is arranged on the end surface of the long pressure plate 4 away from the long fixed plate 6, and the long conical sealing strip 3 touches and presses on the junction of the wide side wall of the valve plate 2 and the top surface of the valve seat 1; the tip of the long conical sealing strip 3 touches and presses on the gap; the length of the long conical sealing strip is the same as the width of the valve plate; the two long conical sealing strips and the two short conical sealing strips are in end-to-end contact to form a rectangular sealing ring, which surrounds and blocks the rectangular gap between the valve plate and the valve seat.
[0019] Consistent with the principle of the long sealing mechanism, the short conical sealing strip 8 in the short sealing mechanism blocks the gap of the narrow side; the short sealing mechanism includes a short conical sealing strip 8, a short pressure plate 9, a second guide plate 10, a short fixed plate 11 and a second electric cylinder 12; both ends of the short fixed plate 11 are fixed to the top surface of the valve seat 1 by a bracket, and the length direction line of the short fixed plate 11 is parallel to the thickness direction line of the valve plate 2; both ends of the short pressure plate 9 are provided with a second guide plate 10, both ends of the short fixed plate 11 are provided with a guide hole, and the second guide plate 10 is inserted into the two guide holes; the second electric cylinder 12 is arranged on the short fixed plate 11, and the end of its piston rod is connected to the short pressure plate 9; the short conical sealing strip 8 is arranged on the end surface of the short pressure plate 9 away from the short fixed plate 11, and the short conical sealing strip 8 touches and presses on the junction of the narrow side wall of the valve plate 2 and the top surface of the valve seat 1; the length of the short conical sealing strip is equal to the thickness of the valve plate.
[0020] The sliding sealing part includes a square sleeve 13, a bottom sealing ring 14 and a third electric cylinder 15; the square sleeve 13 is sleeved on the outer wall of the valve plate 2, and the inner wall of the square sleeve 13 is consistent with the outer wall of the valve plate 2; the bottom sealing ring 14 is arranged at the bottom end of the square sleeve 13; the third electric cylinder 15 can drive the square sleeve 13 to rise and fall, and the number of the third electric cylinders 15 is four, and they are all arranged on the top surface of the valve seat 1, and the four third electric cylinders 15 are respectively located at the four corners of the square sleeve 13, and the piston rod ends of each third electric cylinder 15 are respectively connected to the four corners of the square sleeve 13; when the square sleeve 13 falls, the bottom sealing ring 14 at its bottom end blocks the gap between the valve plate and the valve seat; when the valve plate is stationary , the gap sealing part completes the gap sealing operation, and when the valve plate slides, the sliding sealing part completes the sealing function; the reason why two sets of sealing mechanisms are provided is that the conical sealing strip relies on the tip of its end to touch and press on the gap to seal, and the structure of the tip can better seal the gap, but when the valve plate slides, the valve plate will drive the tip of the conical sealing strip to warp up, which will cause a tiny gap between the conical sealing strip and the gap, and smoke will overflow from this tiny gap; therefore, in the sliding stage of the valve plate, the electric cylinder drives the conical sealing strip to withdraw, and the third electric cylinder 15 drives the square sleeve 13 to slide down until the bottom sealing ring 14 seals the gap, and at this time, the bottom sealing ring 14 replaces the conical sealing strip to seal the rectangular gap.
[0021] Principle of use: During daily use, when the valve plate is in a stationary state, the first electric cylinder and the second electric cylinder are in an extended state, driving the four conical sealing strips to seal the four edges of the gaps at the junction of the valve plate and the valve seat; once the valve plate needs to slide to change the on-off state of the pipeline, the first electric cylinder and the second electric cylinder are actuated to drive the conical sealing strip to slide away from the valve plate, and the third electric cylinder is actuated to drive the square sleeve downward, so that the bottom sealing ring re-seals the gap. After the valve plate returns to a stationary state, the third electric cylinder is actuated to drive the square sleeve upward to make the bottom sealing ring 14 disengage from the gap. At this time, the first electric cylinder and the second electric cylinder are actuated to cause the conical sealing strip to re-seal the gap until the next valve plate movement, and the above actions are repeated.
Claims
1. A gate valve with good airtightness, characterized in that: The valve seat (1) comprises a valve seat (1), a valve plate (2), a U-shaped seat, a screw, a gap sealing part and a sliding sealing part; a sliding hole is arranged in the valve seat (1), and the valve plate (2) is slidingly arranged in the sliding hole of the valve seat (1); a through hole is arranged on the valve seat (1), and a through hole is also arranged on the valve plate (2), and the through hole of the valve seat (1) matches the through hole of the valve plate (2); both ends of the through hole of the valve seat (1) are connected to the pipeline; the U-shaped seat is arranged on the top end surface of the valve seat (1); a threaded hole is arranged in the center of the U-shaped seat, and the screw passes through the threaded hole in the center of the U-shaped seat, a handle is arranged at the top end of the screw, and the bottom end of the screw is axially connected to the center of the top end surface of the valve plate (2); the gap sealing part and the sliding sealing part are both arranged on the top end surface of the valve seat (1), and they are both in close contact with the valve plate (2).
2. The gate valve with good airtightness according to claim 1, characterized in that: The gap sealing portion comprises a long sealing mechanism and a short sealing mechanism; the number of the long sealing mechanism and the short sealing mechanism are both two, and both are arranged on the top end surface of the valve seat (1); the two long sealing mechanisms are respectively located on both sides of the valve plate (2) in the thickness direction, and the two short sealing mechanisms are respectively located on both sides of the valve plate (2) in the width direction.
3. The gate valve with good airtightness according to claim 2, characterized in that: The long sealing mechanism comprises a long conical sealing strip (3), a long pressure plate (4), a first guide plate (5), a long fixed plate (6) and a first electric cylinder (7); the two ends of the long fixed plate (6) are fixed to the top end surface of the valve seat (1) by a bracket, and the length direction line of the long fixed plate (6) is parallel to the width direction line of the valve plate (2); the two ends of the long pressure plate (4) are provided with a first guide plate (5), the two ends of the long fixed plate (6) are provided with a guide hole, and the first guide plate (5) is inserted into the two guide holes; the first electric cylinder (7) is arranged on the long fixed plate (6), and the end of its piston rod is connected to the long pressure plate (4); the long conical sealing strip (3) is arranged on the end surface of the long pressure plate (4) away from the long fixed plate (6), and the long conical sealing strip (3) contacts and presses on the junction of the wide side wall of the valve plate (2) and the top end surface of the valve seat (1); the length of the long conical sealing strip (3) is the same as the width of the valve plate.
4. The gate valve with good airtightness according to claim 3, characterized in that: The short sealing mechanism comprises a short conical sealing strip (8), a short pressure plate (9), a second guide plate (10), a short fixed plate (11) and a second electric cylinder (12); the two ends of the short fixed plate (11) are fixed to the top surface of the valve seat (1) by means of brackets, and the length direction line of the short fixed plate (11) is parallel to the thickness direction line of the valve plate (2); the two ends of the short pressure plate (9) are provided with second guide plates (10), the two ends of the short fixed plate (11) are provided with guide holes, and the second guide plates (10) are inserted into the two guide holes; the second electric cylinder (12) is arranged on the short fixed plate (11), and the end of its piston rod is connected to the short pressure plate (9); the short conical sealing strip (8) is arranged on the end surface of the short pressure plate (9) away from the short fixed plate (11), and the short conical sealing strip (8) contacts and presses on the junction between the narrow side wall of the valve plate (2) and the top surface of the valve seat (1); the length of the short conical sealing strip (8) is equal to the thickness of the valve plate.
5. The gate valve with good airtightness according to claim 4, characterized in that: The sliding sealing part comprises a square sleeve (13), a bottom sealing ring (14) and a third electric cylinder (15); the square sleeve (13) is sleeved on the outer wall of the valve plate (2), and the inner wall of the square sleeve (13) matches the outer wall of the valve plate (2); the bottom sealing ring (14) is arranged at the bottom end of the square sleeve (13); the number of the third electric cylinders (15) is four, and they are all arranged on the top end surface of the valve seat (1), and the four third electric cylinders (15) are respectively located at the four corners of the square sleeve (13), and the piston rod ends of the third electric cylinders (15) are respectively connected to the four corner tops of the square sleeve (13).