Bidirectional sealing stop valve

Abstract

The utility model discloses a two-way sealing stop valve which comprises a stop valve body, a valve seat is arranged in the middle of the top of the outer edge face of the stop valve body, a flange plate is detachably installed above the valve seat, a boss is arranged in the middle of the upper end face of the flange plate, a valve rod is rotatably installed in the boss, and a hand wheel is arranged at the top end of the valve rod. Two L-shaped baffles are symmetrically arranged in the stop valve body, the opposite ends of the two L-shaped baffles are jointly connected with a connecting block, a water drainage hole is formed in the middle of the interior of the connecting block, the bottom end of the valve rod extends and penetrates out of the water drainage hole and is fixedly connected with a first sealing plate, and lead screw teeth are arranged on the outer edge face of the bottom end of the valve rod. The bidirectional sealing stop valve has the advantages that the bidirectional sealing stop valve is reasonable in structure, the impact force generated in the closing process of the valve can be favorably relieved, meanwhile, the sealing effect of the closing of the valve can be improved, and the practicability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of stop valves, and in particular relates to a bidirectional sealing stop valve. Background Art

[0002] Globe valves, also known as stop valves, are one of the most widely used valves due to their low friction, durability, low opening height, ease of manufacture, and convenient maintenance. They are suitable for both low and medium pressures, as well as high pressures. During valve production, all valves, except throttle valves, whether used for shutoff or regulating, must have a certain degree of sealing performance. Therefore, each valve undergoes a sealing test before leaving the factory.

[0003] At present, most traditional sealed stop valves achieve valve closure by a one-way stop method. However, since the impact force on the valve seat sealing plate is relatively large at the moment of valve closing, and the valve seat sealing plate is continuously subjected to the pressure of the fluid after closing, it is easy to cause the sealing effect of the sealing plate to decrease over time and leakage to occur. Therefore, there are certain shortcomings. Utility Model Content

[0004] The purpose of the present utility model is to provide a two-way sealing stop valve to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A two-way sealing stop valve comprises a stop valve body with a valve seat centrally constructed on the top of an outer edge surface;

[0007] A flange is detachably mounted above the valve seat, and a boss is centrally constructed on the upper end face of the flange, and a valve stem is rotatably mounted in the boss. A handwheel is constructed on the top end of the valve stem, and two L-shaped baffles are symmetrically mounted inside the stop valve body, and the two L-shaped baffles facing each other are jointly constructed and connected to a connecting block, wherein a drain hole is centrally opened in the connecting block, and the bottom end of the valve stem extends through the drain hole and is fixedly connected to a sealing plate 1, and a screw gear is constructed on the outer edge surface of the bottom end of the valve stem, and the bottom end of the valve stem is located above the connecting block and is movably provided with a screw shaft sleeve, and the bottom end of the screw shaft sleeve is connected to a sealing plate 2 movably sleeved on the outer edge surface of the valve stem, and a limiting groove is provided on one side of the L-shaped baffle, and a limiting plate with one end movably inserted and installed in the limiting groove is constructed on the outer edge surface of the sealing plate 2, and both sides of the limiting plate abut against the inner wall of the limiting groove.

[0008] Furthermore, sealing gaskets are bonded and fixed to the facing ends of sealing plate 1 and sealing plate 2, and sealing grooves are provided on the upper end surface and the lower end surface of the connecting block at the coaxial position corresponding to the drain hole. The sealing gasket can be movably abutted in the sealing groove, and an airbag cavity is provided in the sealing gasket.

[0009] Furthermore, connecting flanges are provided at both ends of the outer edge surface of the stop valve body, the inner edge surface of the connecting flange is structurally connected and fixed to the outer edge surface of the stop valve body, and the interior of the connecting flange is provided with connecting holes in an annular array.

[0010] Furthermore, a flange seat is installed on the top structure of the outer edge surface of the valve seat, and the lower end surface of the flange plate is detachably connected to the upper end surface of the flange seat.

[0011] Furthermore, threaded holes are provided in an annular array in the flange seat and the flange plate, and fixing screws are threadedly installed in the threaded holes. Fixing nuts for locking the flange seat and the flange plate are threadedly installed on the outer edge surfaces of both ends of the fixing screws.

[0012] Compared with the prior art, the present invention has the following beneficial effects: thanks to the arrangement of the stop valve body, valve seat, flange, valve stem, hand wheel, L-shaped baffle, limiting groove, connecting block, drain hole, sealing plate 1, sealing plate 2, screw shaft sleeve and limiting plate, when the stop valve body needs to be closed, the hand wheel can be gripped and rotated to rotate the valve stem to rotate and lift the sealing plate 1. During this process, the sealing plate 2 moves downward through the movable connection between the screw shaft sleeve and the valve stem and the movable plugging of the limiting plate and the limiting groove, thereby causing the sealing plate 1 and the sealing plate 2 to move toward each other and block and seal the drain hole, thereby achieving a two-way sealing effect, which is beneficial to alleviating the excessive impact force of the fluid during the valve closing process, and the two-way sealing is beneficial to improving the sealing effect and reducing the occurrence of leakage;

[0013] Thanks to the setting of the sealing gasket and the airbag cavity, when the sealing plate 1 and the sealing plate 2 move toward each other, the sealing gasket first abuts against the inside of the sealing groove. During the abutment process, the internal space of the airbag cavity will be compressed, so that the sealing gasket and the sealing groove fit more closely, avoiding the formation of abutment gaps, thereby further improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 For this utility model Figure 1 sectional view of

[0016] Figure 3 For this utility model Figure 2 A magnified schematic diagram of the structure at center A.

[0017] In the figure: 1. Stop valve body; 2. Connecting flange; 3. Connecting hole; 4. Valve seat; 5. Flange seat; 6. Flange plate; 7. Fixing screw; 8. Fixing nut; 9. Valve stem; 10. Handwheel; 11. L-shaped baffle; 12. Limiting groove; 13. Connecting block; 14. Drain hole; 15. Sealing plate 1; 16. Sealing plate 2; 17. Sealing gasket; 18. Screw shaft sleeve; 19. Limiting plate. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] like Figure 1-Figure 3 As shown, the two-way sealing stop valve comprises a stop valve body 1 with a valve seat 4 centrally constructed on the top of the outer edge surface, a flange 6 detachably mounted above the valve seat 4, a boss centrally constructed on the upper end surface of the flange 6, a valve stem 9 rotatably mounted in the boss, a handwheel 10 configured on the top end of the valve stem 9, and two L-shaped baffles 11 are symmetrically mounted inside the stop valve body 1, and the facing ends of the two L-shaped baffles 11 are jointly constructed and connected to a connecting block 13, a drain hole 14 is centrally provided in the connecting block 13, the bottom end of the valve stem 9 extends out of the drain hole 14 and is fixedly connected to a sealing plate 15, and a screw tooth is configured on the outer edge surface of the bottom end of the valve stem 9, and the bottom end of the valve stem 9 is located above the connecting block 13 and is movably provided with a screw shaft sleeve 18, and the bottom end of the screw shaft sleeve 18 is configured The structure is connected with a sealing plate 2 16 which can be movably sleeved on the outer edge surface of the valve stem 9, and a limiting groove 12 is provided on one side of the L-shaped baffle 11. A limiting plate 19 is constructed on the outer edge surface of the sealing plate 2 16, and one end of the limiting plate 19 can be movably inserted and installed in the limiting groove 12. Both sides of the limiting plate 19 abut against the inner wall of the limiting groove 12. When it is necessary to close the stop valve body 1, the hand wheel 10 can be held and rotated to make the valve stem 9 rotate and rise and drive the sealing plate 15 to rise. In this process, the sealing plate 2 16 is moved downward through the movable connection between the screw shaft sleeve 18 and the valve stem 9 and the movable insertion of the limiting plate 19 and the limiting groove 12, so that the sealing plate 15 and the sealing plate 2 16 move toward each other and seal the drain hole 14, thereby achieving a two-way sealing effect.

[0020] like Figure 2 and Figure 3As shown, sealing gaskets 17 are bonded and fixed to the facing ends of sealing plate 15 and sealing plate 2 16, and sealing grooves are provided on the upper end surface and the lower end surface of the connecting block 13 at the coaxial position corresponding to the drain hole 14. The sealing gasket 17 is movably abutted in the sealing groove, and an airbag cavity is provided in the sealing gasket 17. During the relative movement of sealing plate 15 and sealing plate 2 16, the sealing gasket 17 first abuts against the inside of the sealing groove, and the internal space of the airbag cavity is compressed during the abutment process, thereby making the sealing gasket 17 fit more closely with the sealing groove and avoiding the occurrence of abutment gaps.

[0021] like Figure 1 As shown, connecting flanges 2 are provided at both ends of the outer edge surface of the stop valve body 1, the inner edge surface of the connecting flange 2 is structurally connected and fixed to the outer edge surface of the stop valve body 1, and the interior of the connecting flange 2 is provided with connecting holes 3 in an annular array, the top structure of the outer edge surface of the valve seat 4 is installed with a flange seat 5, the lower end surface of the flange plate 6 is detachably connected to the upper end surface of the flange seat 5, and threaded holes are provided in an annular array in the flange seat 5 and the flange plate 6, and fixing screws 7 are installed with threads in the threaded holes, and fixing nuts 8 for locking the flange seat 5 and the flange plate 6 are threadedly installed on the outer edge surfaces of both ends of the fixing screw 7.

[0022] Working principle: When the two-way sealing stop valve is in use, when the stop valve body 1 needs to be closed, the handwheel 10 can be held and rotated to make the valve stem 9 rotate and rise and drive the sealing plate 15 to rise. In this process, the sealing plate 2 16 is moved downward through the movable connection between the screw shaft sleeve 18 and the valve stem 9 and the movable plug-in connection between the limit plate 19 and the limit groove 12, thereby making the sealing plate 15 and the sealing plate 2 16 move toward each other and seal the drain hole 14, thereby achieving a two-way sealing effect. In the process of the sealing plate 15 and the sealing plate 2 16 moving toward each other, the sealing gasket 17 first abuts against the inside of the sealing groove. During the abutment process, the internal space of the airbag cavity will be compressed, thereby making the sealing gasket 17 fit more closely with the sealing groove to avoid the formation of abutment gaps. The two-way sealing stop valve has a reasonable structure, which is conducive to alleviating the impact force generated during the valve closing process, while improving the sealing effect of the valve closing, and is highly practical.

[0023] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A two-way sealing stop valve, comprising a stop valve body (1) with a valve seat (4) centrally configured at the top of an outer edge surface; Its characteristics are: A flange (6) is detachably mounted above the valve seat (4), a boss is centrally constructed on the upper end face of the flange (6), a valve stem (9) is rotatably mounted in the boss, a hand wheel (10) is constructed on the top end of the valve stem (9), two L-shaped baffles (11) are symmetrically mounted inside the shut-off valve body (1), the two L-shaped baffles (11) are connected to each other at one end thereof, a connecting block (13) is centrally arranged with a drain hole (14), the bottom end of the valve stem (9) extends through the drain hole (14) and is fixedly connected to a sealing plate. (15), and a screw tooth is constructed on the outer edge surface of the bottom end of the valve stem (9), and the bottom end of the valve stem (9) is located above the connecting block (13) and is movably provided with a screw shaft sleeve (18), and the bottom end of the screw shaft sleeve (18) is connected to a sealing plate 2 (16) that can be movably sleeved on the outer edge surface of the valve stem (9), and a limiting groove (12) is provided on one side of the L-shaped baffle (11), and a limiting plate (19) is constructed on the outer edge surface of the sealing plate 2 (16), one end of which can be movably inserted into the limiting groove (12), and both sides of the limiting plate (19) are in contact with the inner wall of the limiting groove (12).

2. A two-way sealing stop valve according to claim 1, characterized in that: The facing ends of the sealing plate 1 (15) and the sealing plate 2 (16) are both bonded and fixed with a sealing gasket (17); the upper end surface and the lower end surface of the connecting block (13) are both provided with a sealing groove at a coaxial position corresponding to the drain hole (14); the sealing gasket (17) is movably abutted and arranged in the sealing groove, and an air bag cavity is provided in the sealing gasket (17).

3. A two-way sealing stop valve according to claim 1, characterized in that: Connecting flanges (2) are provided at both ends of the outer edge surface of the stop valve body (1); the inner edge surface of the connecting flange (2) is structurally connected and fixed to the outer edge surface of the stop valve body (1); and the interior of the connecting flange (2) is provided with connecting holes (3) in an annular array.

4. A two-way sealing stop valve according to claim 1, characterized in that: A flange seat (5) is installed on the top structure of the outer edge surface of the valve seat (4), and the lower end surface of the flange plate (6) is detachably connected to the upper end surface of the flange seat (5).

5. A two-way sealing stop valve according to claim 4, characterized in that: The flange seat (5) and the flange plate (6) are provided with threaded holes in an annular array, and the threaded holes are threadedly fitted with fixing screws (7), and the outer edge surfaces at both ends of the fixing screws (7) are threadedly fitted with fixing nuts (8) for locking the flange seat (5) and the flange plate (6).

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