Compact ball valve internally provided with multiple sealing units

Abstract

The utility model discloses a compact ball valve with a built-in multiple sealing unit, which comprises a spherical valve body, connecting pipes are symmetrically arranged at the top end and the bottom end of the spherical valve body, a ball valve assembly is arranged in the spherical valve body, auxiliary sealing assemblies are arranged on the connecting pipes, and the auxiliary sealing assemblies are arranged on the connecting pipes. The ball valve assembly comprises a ball valve element rotationally installed in a spherical inner cavity of the ball valve body, the outer wall of the ball valve element is tightly attached to the inner wall of the ball valve body, the auxiliary sealing assembly comprises plate boxes symmetrically installed on the two connecting pipes, the plate boxes are communicated with the connecting pipes, and flashboards are installed in the plate boxes in a sliding mode. In the working process, when the channel arranged on the ball-shaped valve element is in the longitudinal state, the gate plates are located at the position where the connecting pipe does not need to be overlapped, after the ball-shaped valve element rotates by 90 degrees, the channel is in the transverse state, the connecting pipe is closed, meanwhile, the upper gate plate and the lower gate plate transversely move to seal the connecting pipe, multiple sealing is formed, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ball valves, in particular to a compact ball valve with built-in multiple sealing units. Background Art

[0002] A ball valve is a common type of valve. Its opening and closing member (ball) is driven by the valve stem and rotates around the ball valve axis to open or close the fluid. The inner cavity of the valve body is spherical, and the valve core is also set to be spherical. A channel is opened on the valve core. As the valve core rotates, the channel rotates to the open or closed position, thereby opening or closing the fluid. Regular cleaning, greasing and inspection of the ball valve are key to ensuring its normal operation. During maintenance, care should be taken to avoid contamination or adhesion of impurities such as metal debris, fiber, grease, etc. on the surface of the parts. However, the following defects still exist:

[0003] The ball valve only achieves sealing through the close contact between the valve body and the valve core. When the ball valve is used for a long time, the valve core may be deformed, which will increase the gap between the valve body and the valve core, resulting in poor sealing effect. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a compact ball valve with built-in multiple sealing units, which effectively solves the problem that the ball valve only achieves sealing through the close contact between the valve body and the valve core, resulting in poor sealing effect in the later stage.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a compact ball valve with a built-in multiple sealing unit, comprising a spherical valve body, connecting pipes symmetrically mounted at the top and bottom ends of the spherical valve body, a ball valve assembly mounted inside the spherical valve body, and an auxiliary sealing assembly mounted on the connecting pipe;

[0006] The ball valve assembly includes a spherical valve core rotatably mounted in the spherical inner cavity of the spherical valve body, and the outer wall of the spherical valve core is in close contact with the inner wall of the spherical valve body;

[0007] The auxiliary sealing assembly includes a plate box symmetrically installed on the two connecting pipes. The plate box is connected to the connecting pipes. A gate is slidably installed inside the plate box. The outer wall of the gate is in close contact with the inner wall of the plate box. The two gates seal the two connecting pipes respectively.

[0008] Preferably, the ball valve assembly further comprises a fixed sleeve fixedly mounted on the front of the spherical valve body, a rotating shaft is fixedly mounted on the front of the spherical valve core, the rotating shaft is rotatably mounted inside the fixed sleeve, and a turning handle is fixedly mounted on the end of the rotating shaft.

[0009] Preferably, a first card slot and a second card slot are provided on the outer wall of the fixing sleeve, and the angle between the first card slot and the second card slot is ninety degrees.

[0010] Preferably, a fixing cylinder is fixedly installed on the top of the fixing sleeve, a clamping rod is movably installed inside the fixing cylinder, a spring is fixedly installed on the top of the clamping rod, a pull rod is fixedly installed on the top of the clamping rod, and the pull rod passes through the outside of the fixing cylinder. When the clamping rod is engaged with the first clamping slot, the upper and lower connecting tubes are connected. When the clamping rod is engaged with the second clamping slot, the upper and lower connecting tubes are closed by the fixing sleeve.

[0011] Preferably, the auxiliary sealing assembly further comprises connecting rods respectively mounted on both sides of the gate plate, the connecting rods extending to the outside of the plate box, connecting plates fixedly mounted on the ends of the connecting rods, and tooth plates fixedly mounted on the connecting plates.

[0012] Preferably, a gear is fixedly mounted on the rotating shaft, and two tooth plates are respectively engaged with the upper and lower sides of the gear. A support plate is symmetrically mounted on the front of the spherical valve body, and two guide grooves are symmetrically provided on the support plate. The two tooth plates are respectively slidably connected to the two guide grooves.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] During operation, when the channel on the ball valve core is in the longitudinal state, the gate is located at the position where the connecting pipe is not connected. When the ball valve core rotates 90 degrees, the channel is in the transverse state, closing the connecting pipe. At the same time, the upper and lower gates move transversely to seal the connecting pipe, forming a multiple seal to improve the sealing effect.

[0015] During operation, a gear is installed on the rotating shaft, and tooth plates are meshed and connected on the upper and lower sides of the gear. The two tooth plates are fixedly connected to the two gate plates respectively, so that when the ball valve core rotates, the positions of the two gate plates can be adjusted synchronously, thereby improving the adjustment efficiency.

[0016] During operation, a first card slot and a second card slot are provided on the outer wall of the rotating shaft, and the angle between the first card slot and the second card slot is ninety degrees. When the card rod is engaged with the first card slot, the connecting pipe is in a connected state. When the card rod is engaged with the second card slot, the connecting pipe is in a closed state, which is convenient for fixing the position of the ball valve core and the gate plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0018] In the attached figure:

[0019] Figure 1 This is a schematic structural diagram of a compact ball valve with built-in multiple sealing units according to the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the spherical valve body of the utility model;

[0021] Figure 3 This is a schematic structural diagram of a ball valve assembly of the present utility model;

[0022] Figure 4 This is a schematic diagram of the ball valve core structure of the utility model;

[0023] Figure 5 This is a schematic diagram of the gate structure of the present utility model.

[0024] In the figure: 1. Spherical valve body; 2. Connecting pipe; 3. Ball valve assembly; 301. Spherical valve core; 302. Fixed sleeve; 303. Rotating shaft; 304. First slot; 305. Second slot; 306. Fixed cylinder; 307. Clamping rod; 308. Spring; 309. Pull rod; 310. Turn handle; 4. Auxiliary sealing assembly; 401. Plate box; 402. Gate; 403. Connecting rod; 404. Connecting plate; 405. Tooth plate; 406. Gear; 407. Support plate; 408. Guide groove. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described 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; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Embodiment 1, by Figure 1-5 The utility model relates to a compact ball valve with a built-in multiple sealing unit, comprising a spherical valve body 1, connecting pipes 2 symmetrically mounted on the top and bottom ends of the spherical valve body 1, a ball valve assembly 3 mounted inside the spherical valve body 1, and an auxiliary sealing assembly 4 mounted on the connecting pipe 2;

[0027] The ball valve assembly 3 includes a ball valve core 301 rotatably mounted in the spherical inner cavity of the ball valve body 1. The outer wall of the ball valve core 301 is in close contact with the inner wall of the ball valve body 1. The ball valve assembly 3 also includes a fixed sleeve 302 fixedly mounted on the front of the ball valve body 1. A rotating shaft 303 is fixedly mounted on the front of the ball valve core 301. The rotating shaft 303 is rotatably mounted inside the fixed sleeve 302. A turning handle 310 is fixedly mounted on the end of the rotating shaft 303. A first card groove 304 and a second card groove 305 are opened on the outer wall of the fixed sleeve 302. The first card groove 304 and the second card groove 305 are fixedly mounted on the outer wall of the fixed sleeve 302. The angle between the second slots 305 is ninety degrees. A fixed cylinder 306 is fixedly installed on the top of the fixed sleeve 302. A clamping rod 307 is movably installed inside the fixed cylinder 306. A spring 308 is fixedly installed on the top of the clamping rod 307. A pull rod 309 is fixedly installed on the top of the clamping rod 307. The pull rod 309 extends to the outside of the fixed cylinder 306. When the clamping rod 307 is clamped with the first slot 304, the upper and lower connecting tubes 2 are connected. When the clamping rod 307 is clamped with the second slot 305, the upper and lower connecting tubes 2 are closed by the fixed sleeve 302.

[0028] The auxiliary sealing assembly 4 includes a plate box 401 symmetrically mounted on the two connecting pipes 2, the plate box 401 is connected to the connecting pipe 2, and a gate 402 is slidably mounted inside the plate box 401. When the channel on the ball valve core 301 is in a longitudinal state, the gate 402 is located in a position where the connecting pipe 2 does not overlap. When the ball valve core 301 rotates ninety degrees, the channel is in a horizontal state, closing the connecting pipe 2. At the same time, the upper and lower gates 402 move horizontally to seal the connecting pipe 2, forming a multiple seal to improve the sealing effect. The outer wall of the gate 402 is tightly attached to the inner wall of the plate box 401, and the two gates 402 respectively seal the two connecting pipes 2. The auxiliary sealing assembly 4 also includes connecting rods 403 respectively mounted on both sides of the gate 402. The connecting rod 403 passes through the outer side of the plate box 401, and the end of the connecting rod 403 is fixedly mounted with a connecting plate 404. A tooth plate 405 is fixedly mounted on the connecting plate 404, and a gear 406 is fixedly mounted on the rotating shaft 303. 405 are respectively engaged with the upper and lower sides of the gear 406, and the gear 406 is installed on the rotating shaft 303. The upper and lower sides of the gear 406 are respectively engaged with the toothed plates 405. The two toothed plates 405 are respectively fixedly connected to the two gate plates 402, so that when the ball valve core 301 rotates, the positions of the two gate plates 402 can be synchronously adjusted to improve the adjustment efficiency. The front of the ball valve body 1 is symmetrically installed with a support plate 407, and the support plate 407 is symmetrically provided with two guide grooves 4 08. The two tooth plates 405 are respectively slidably connected to the two guide grooves 408. A first card slot 304 and a second card slot 305 are provided on the outer wall of the rotating shaft 303. The angle between the first card slot 304 and the second card slot 305 is ninety degrees. When the card rod 307 is engaged with the first card slot 304, the connecting pipe 2 is in a connected state. When the card rod 307 is engaged with the second card slot 305, the connecting pipe 2 is in a closed state, which is convenient for fixing the position of the ball valve core 301 and the gate plate 402.

[0029] When the spool 301 is in the closed position, the first locking groove 304 is pulled upward to disengage the first locking groove 304, and the staff rotates the spool 301 ninety degrees by turning the handle 310, thereby closing the two connecting pipes 2. During the rotation of the shaft 303, the toothed plate 405 connected to the two gate plates 402 engages with the upper and lower sides of the gear 406 respectively, thereby driving the two gate plates 402 to move horizontally to the closing position of the connecting pipe 2, so that two gate plates 402 for sealing are added on the upper and lower sides of the spool 301, thereby improving the sealing effect. After the rotation adjustment is completed, the clamping rod 307 is clamped with the second locking groove 305 to fix the position of the spool 301 and the positions of the two gate plates 402.

Claims

1. A compact ball valve with a built-in multiple sealing unit, comprising a spherical valve body (1), characterized in that: The top and bottom ends of the spherical valve body (1) are symmetrically mounted with connecting pipes (2), a ball valve assembly (3) is mounted inside the spherical valve body (1), and an auxiliary sealing assembly (4) is mounted on the connecting pipe (2); The ball valve assembly (3) comprises a ball valve core (301) rotatably mounted in the spherical inner cavity of the ball valve body (1), wherein the outer wall of the ball valve core (301) is in close contact with the inner wall of the ball valve body (1); The auxiliary sealing assembly (4) comprises a plate box (401) symmetrically mounted on the two connecting pipes (2). The plate box (401) is connected to the connecting pipes (2). A gate plate (402) is slidably mounted inside the plate box (401). The outer wall of the gate plate (402) is in close contact with the inner wall of the plate box (401). The two gate plates (402) respectively seal the two connecting pipes (2).

2. A compact ball valve with built-in multiple sealing units according to claim 1, characterized in that: The ball valve assembly (3) further comprises a fixed sleeve (302) fixedly mounted on the front face of the spherical valve body (1); a rotating shaft (303) is fixedly mounted on the front face of the spherical valve core (301); the rotating shaft (303) is rotatably mounted inside the fixed sleeve (302); and a turning handle (310) is fixedly mounted on the end of the rotating shaft (303).

3. The compact ball valve with built-in multiple sealing units according to claim 2, characterized in that: A first card slot (304) and a second card slot (305) are provided on the outer wall of the fixing sleeve (302), and the angle between the first card slot (304) and the second card slot (305) is ninety degrees.

4. The compact ball valve with built-in multiple sealing units according to claim 3, characterized in that: A fixing tube (306) is fixedly installed on the top of the fixing sleeve (302), a clamping rod (307) is movably installed inside the fixing tube (306), a spring (308) is fixedly installed on the top of the clamping rod (307), a pull rod (309) is fixedly installed on the top of the clamping rod (307), and the pull rod (309) passes through the outside of the fixing tube (306). When the clamping rod (307) is clamped with the first clamping groove (304), the upper and lower connecting tubes (2) are connected. When the clamping rod (307) is clamped with the second clamping groove (305), the upper and lower connecting tubes (2) are closed by the fixing sleeve (302).

5. The compact ball valve with built-in multiple sealing units according to claim 1, characterized in that: The auxiliary sealing assembly (4) further includes connecting rods (403) respectively mounted on both sides of the gate plate (402), the connecting rods (403) extending through the outside of the plate box (401), and connecting plates (404) fixedly mounted on the ends of the connecting rods (403), on which tooth plates (405) are fixedly mounted.

6. The compact ball valve with built-in multiple sealing units according to claim 2, characterized in that: A gear (406) is fixedly mounted on the rotating shaft (303), and two tooth plates (405) are respectively engaged with the upper and lower sides of the gear (406). A support plate (407) is symmetrically mounted on the front of the spherical valve body (1), and two guide grooves (408) are symmetrically provided on the support plate (407). The two tooth plates (405) are respectively slidably connected to the two guide grooves (408).

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