A highly sealed valve with a self-locking function

Abstract

The present invention discloses a high-sealing valve with a self-locking function, which comprises a vertically tubular valve seat. An inlet pipe is formed at the lower end of the valve seat, an outlet pipe is formed on the side wall of the valve seat, and a first flange is formed at the upper end of the valve seat. A vertical positioning sleeve is provided above the valve seat, and a second flange is formed at the lower end of the positioning sleeve. The second flange and the first flange are fixedly connected by a bolt assembly; a valve core is inserted into the valve seat, and the valve core is pressed against the pipe wall at the inlet of the inlet pipe; a cylindrical valve rod is formed at the upper end of the valve core, and a vertical threaded hole is formed at the upper end of the valve rod after passing through the positioning sleeve; vertical limiting grooves are formed on the outer walls of the two opposite sides of the positioning sleeve, and a horizontal limiting pin shaft is inserted and fixed on the valve rod, and both ends of the limiting pin shaft are inserted into the limiting grooves of the positioning sleeve.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and more particularly to a high-sealing valve with a self-locking function. Background Art

[0002] Valves are control components in fluid delivery systems and have functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. Valves are often used in industrial production processes. For example, valves are needed in liquid delivery pipelines. The valves in existing delivery pipelines are generally driven by screws to close the valve core to achieve pipeline interception. However, in actual working conditions, the intercepted pipeline is pressurized, and the pressure will act on the valve core, causing the screw to loosen and the valve core to move, which will lead to leakage. Therefore, it is necessary to design a corresponding mechanical self-locking structure to limit the movement of the valve core. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies of the prior art and to provide a highly sealed valve with a self-locking function, wherein the valve utilizes a connecting rod self-locking structure to restrict the movement of the valve core when the valve is closed, thereby effectively ensuring the sealing performance of the valve when it is closed.

[0004] A highly sealing valve with a self-locking function, comprising a vertical tubular valve seat, an inlet pipe is formed at the lower end of the valve seat, an outlet pipe is formed on the side wall of the valve seat, a first flange is formed at the upper end of the valve seat, a vertical positioning sleeve is provided above the valve seat, a second flange is formed at the lower end of the positioning sleeve, and the second flange and the first flange are fixedly connected by a bolt assembly; a valve core is inserted into the valve seat, and the valve core is pressed against the pipe wall at the inlet of the pipe; a cylindrical valve stem is formed at the upper end of the valve core, and a vertical thread is formed on the upper end of the valve stem through the positioning sleeve Hole; vertical limit grooves are formed on the opposite outer walls on both sides of the positioning sleeve, and a horizontal limit pin is inserted and fixed on the valve stem, and the two ends of the limit pin are inserted in the limit grooves of the positioning sleeve; an inverted U-shaped fixed bracket is sleeved on the outer side of the positioning sleeve, and the two ends of the fixed bracket are welded and fixed on the second flange; a shaft sleeve is formed on the upper end of the fixed bracket, and a stud is screwed in the threaded hole at the upper end of the valve stem, and the upper end of the stud passes through the shaft sleeve and is fixed with a hand wheel; the lower end surface of the shaft sleeve abuts against the limit sleeve, and the limit sleeve is inserted and fixed on the stud;

[0005] A horizontal connecting column is formed on the outer wall opposite to the upper end of the positioning sleeve, a vertical upper connecting rod is inserted on the connecting column, a T-shaped hinge shaft is fixed on the lower end of the upper connecting rod, a vertical lower connecting rod is inserted on the hinge shaft, and both ends of the limit pin shaft extend out of the positioning sleeve and are inserted on the lower connecting rod.

[0006] Preferably, a rubber seal is covered and fixed on the outer walls of the valve core and the valve stem, and the rubber seal is pressed against the inner wall of the positioning sleeve.

[0007] Preferably, the groove width of the upper limit groove on the positioning sleeve is equal to the diameter of the limit pin shaft.

[0008] Preferably, both ends of the limit pin shaft are formed with support shafts. The support shafts are inserted into the lower connecting rod. A lower retaining ring is fixed through the lower connecting rod inserted sleeve by the support shafts passing through the lower connecting rod. An upper retaining ring is fixed through the upper connecting rod inserted sleeve by the connecting column passing through. The central axis of the support shaft coincides with the central axis of the limit pin shaft. The central axes of the limit pin shaft, the hinge shaft and the connecting column are all located in the same vertical plane.

[0009] Preferably, the central axes of the valve stem, the valve seat, the stud and the positioning sleeve are all located on the same vertical line.

[0010] Preferably, reinforcing ribs are formed on the outer side wall of the fixed support.

[0011] Preferably, the limit pin shaft is located in the middle and lower part of the upper limit groove on the positioning sleeve, and there is a gap between the limit pin shaft and the lower end of the limit groove.

[0012] The beneficial effect of the present invention lies in that the valve adopted by it uses a connecting rod self-locking structure to restrict the movement of the valve core when the valve is closed, effectively ensuring the sealing performance when the valve is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0014] Figure 2 is a front structural schematic diagram of the present invention;

[0015] Figure 3 is a partial cross-sectional schematic diagram in the side view direction of the present invention.

[0016] In the figure: 1, valve seat; 11, inlet pipe; 12, outlet pipe; 13, first flange; 2, positioning sleeve; 21, second flange; 22, limit groove; 23, connecting column; 3, valve core; 31, valve stem; 32, threaded hole; 4, stud; 5, fixed support; 51, reinforcing rib; 52, bushing; 6, handwheel; 7, limit sleeve; 8, limit pin shaft; 81, support shaft; 9, upper connecting rod; 10, lower connecting rod; 20, hinge shaft; 30, lower retaining ring; 40, upper retaining ring; 50, rubber seal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Embodiment: See Figures 1 to 3As shown in the figure, a highly sealed valve with a self-locking function includes a vertically tubular valve seat 1. An inlet pipe 11 is formed at the lower end of the valve seat 1, an outlet pipe 12 is formed on the side wall of the valve seat 1, and a first flange 13 is formed at the upper end of the valve seat 1. A vertical positioning sleeve 2 is provided above the valve seat 1. A second flange 21 is formed at the lower end of the positioning sleeve 2, and the second flange 21 and the first flange 13 are fixedly connected by a bolt assembly. A valve core 3 is inserted into the valve seat 1, and the valve core 3 is pressed against the inner wall of the inlet pipe 11 at the entrance. A cylindrical valve stem 31 is formed at the upper end of the valve core 3, and a vertical threaded hole 32 is formed at the upper end of the valve stem 31 after passing through the positioning sleeve 2. Vertical limiting grooves 22 are formed on the outer walls of the two opposite sides of the positioning sleeve 2. A horizontal limiting pin 8 is inserted and fixed on the valve stem 31, and both ends of the limiting pin 8 are inserted into the limiting grooves 22 of the positioning sleeve 2. An inverted U-shaped fixed bracket 5 is sleeved outside the positioning sleeve 2, and both ends of the fixed bracket 5 are welded and fixed on the second flange 21. A bushing 52 is formed at the upper end of the fixed bracket 5. A stud 4 is screwed into the threaded hole 32 at the upper end of the valve stem 31, and a handwheel 6 is fixed at the upper end of the stud 4 after passing through the bushing 52. A limiting sleeve 7 abuts against the lower end surface of the bushing 52, and the limiting sleeve 7 is inserted and fixed on the stud 4.

[0018] Horizontal connecting columns 23 are formed on the outer walls of the two opposite sides at the upper end of the positioning sleeve 2. A vertical upper connecting rod 9 is inserted into the connecting columns 23. A T-shaped hinge shaft 20 is inserted and fixed at the lower end of the upper connecting rod 9. A vertical lower connecting rod 10 is inserted into the hinge shaft 20. Both ends of the limiting pin 8 extend out of the positioning sleeve 2 and are inserted into the lower connecting rod 10.

[0019] A rubber seal 50 is coated and fixed on the outer walls of the valve core 3 and the valve stem 31, and the rubber seal 50 is pressed against the inner wall of the positioning sleeve 2.

[0020] The groove width of the limiting groove 22 on the positioning sleeve 2 is equal to the diameter of the limiting pin 8.

[0021] Both ends of the limiting pin 8 are formed with support shafts 81. The support shafts 81 are inserted into the lower connecting rod 10. The support shafts 81 pass through the lower connecting rod 10 and are inserted and fixed with lower retaining rings 30. The connecting columns 23 pass through the upper connecting rod 9 and are inserted and fixed with upper retaining rings 40. The central axis of the support shaft 81 coincides with the central axis of the limiting pin 8. The central axis of the limiting pin 8, the central axis of the hinge shaft 20, and the central axis of the connecting column 23 are all located in the same vertical plane.

[0022] The central axis of the valve stem 31, the central axis of the valve seat 1, the central axis of the stud 4, and the central axis of the positioning sleeve 2 are all located on the same vertical line.

[0023] Reinforcing ribs 51 are formed on the outer side wall of the fixed bracket 5.

[0024] The described limit pin shaft 8 is located at the middle and lower part of the upper limit groove 22 of the positioning sleeve 2, and there is a gap between the limit pin shaft 8 and the lower end of the limit groove 22.

[0025] Working principle: The present invention is a highly sealed valve with a self-locking function. The valve is composed of components such as a valve seat 1, a valve core 3, and a positioning sleeve 2. By rotating the handwheel 6, the stud 4 can rotate self-driven. The self-rotation of the stud 4 can drive the valve core 3 to move up and down on the valve seat 1. When the valve core 3 moves to the lower end of the valve seat 1 to seal the inlet pipe 11, the originally inclined lower connecting rod 10 and upper connecting rod 9 will both become vertical states, and the lower connecting rod 10 and the upper connecting rod 9 achieve mechanical self-locking, which can restrain the upward movement of the valve core 3.

[0026] The described embodiments are used to illustrate the present invention by way of example, rather than to limit the present invention. Any person skilled in the art can modify the described embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of the right to protect the present invention should be as listed in the claims of the present invention.

Claims

1. A highly sealed valve with a self-locking function, comprising a vertically tubular valve seat (1). An inlet pipe (11) is formed at the lower end of the valve seat (1), an outlet pipe (12) is formed on the side wall of the valve seat (1), and a first flange (13) is formed at the upper end of the valve seat (1). A vertical positioning sleeve (2) is provided above the valve seat (1). A second flange (21) is formed at the lower end of the positioning sleeve (2), and the second flange (21) and the first flange (13) are fixedly connected by a bolt assembly. A valve core (3) is inserted into the valve seat (1), and the valve core (3) is pressed against the pipe wall at the inlet of the inlet pipe (11). It is characterized in that: The upper end of the valve core (3) is formed with a cylindrical valve stem (31), and a vertical threaded hole (32) is formed through the positioning sleeve (2) at the upper end of the valve stem (31); vertical limiting grooves (22) are formed on the opposite outer walls on both sides of the positioning sleeve (2), and a horizontal limiting pin shaft (8) is inserted and fixed on the valve stem (31), and both ends of the limiting pin shaft (8) are inserted into the limiting grooves (22) of the positioning sleeve (2); an inverted U-shaped fixed bracket (5) is sleeved outside the positioning sleeve (2), and both ends of the fixed bracket (5) are welded and fixed on the second flange (21); a bushing (52) is formed at the upper end of the fixed bracket (5), a stud (4) is screwed into the threaded hole (32) at the upper end of the valve stem (31), and a hand wheel (6) is fixedly connected to the upper end of the stud (4) through the bushing (52); a limiting sleeve (7) is abutted against the lower end surface of the bushing (52), and the limiting sleeve (7) is inserted and fixed on the stud (4); Horizontal connecting columns (23) are formed on the opposite outer walls at the upper end of the positioning sleeve (2), a vertical upper connecting rod (9) is inserted into the connecting columns (23), a T-shaped hinge shaft (20) is inserted and fixed at the lower end of the upper connecting rod (9), a vertical lower connecting rod (10) is inserted into the hinge shaft (20), and both ends of the limiting pin shaft (8) extend out of the positioning sleeve (2) and are inserted into the lower connecting rod (10).

2. The high-sealing valve with a self-locking function according to claim 1, characterized in that: A rubber seal (50) is wrapped and fixed on the outer walls of the valve core (3) and the valve stem (31), and the rubber seal (50) is pressed against the inner wall of the positioning sleeve (2).

3. A highly sealed valve with a self-locking function according to claim 1, characterized in that: The groove width of the limiting groove (22) on the positioning sleeve (2) is equal to the diameter of the limiting pin shaft (8).

4. A highly-sealed valve with a self-locking function according to claim 3, characterized in that: Both ends of the limiting pin shaft (8) are formed with support shafts (81), the support shafts (81) are inserted into the lower connecting rod (10), the support shafts (81) pass through the lower connecting rod (10) and are inserted and fixed with a lower retaining ring (30), the connecting column (23) passes through the upper connecting rod (9) and is inserted and fixed with an upper retaining ring (40), the central axis of the support shaft (81) coincides with the central axis of the limiting pin shaft (8), and the central axes of the limiting pin shaft (8), the hinge shaft (20) and the connecting column (23) are all located in the same vertical plane.

5. A highly-sealed valve with a self-locking function according to claim 1, characterized in that: The central axes of the valve stem (31), the valve seat (1), the stud (4) and the positioning sleeve (2) are all located on the same vertical line.

6. A highly-sealed valve with a self-locking function according to claim 1, characterized in that: Reinforcing ribs (51) are formed on the outer side wall of the fixed bracket (5).

7. The high-sealing valve with a self-locking function according to claim 1, wherein: The limiting pin shaft (8) is located in the middle and lower part of the limiting groove (22) on the positioning sleeve (2), and there is a gap between the limiting pin shaft (8) and the lower end of the limiting groove (22).

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