Ball valve sealing device

Abstract

The utility model relates to a ball valve sealing device, which is characterized in that the upper surface of a ball valve body is rotatably connected with a valve rod, a valve core is rotatably arranged in the ball valve body, one end of the valve rod is fixedly connected with the valve core, and a channel for fluid to flow is arranged in the valve core. First sealing rings are arranged on the two sides, close to the connecting pipe, in the ball valve body, a limiting groove is formed in the position, corresponding to a channel formed in the valve element, of the inner wall of the ball valve body, a first sealing gasket is slidably connected into the limiting groove, a limiting spring is fixedly connected to the bottom face in the limiting groove, and the other end of the limiting spring is fixedly connected with the side face of the first sealing gasket. The first sealing gasket is matched with the channel of the valve element, a second sealing ring is fixedly connected to the side face, close to the valve element, of the first sealing gasket and can be inserted into the channel of the valve element, and an anti-skid mechanism is arranged at the end, away from the valve element, of the valve rod. Through the arrangement, the sealing performance of the ball valve is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve technical field especially relates to a ball valve sealing device. BACKGROUND

[0002] Ball valve, open and close (ball) by the stem drive, and around the ball valve axis rotation movement valve, also can be used for fluid regulation and control, ball valve as an important fluid control valve, because its unique design and excellent performance, in many industries has been widely used.

[0003] The sealing performance of ball valve is crucial to the safe, stable operation, energy saving and consumption reduction, environmental protection and the reduction of maintenance cost, therefore, when selecting and using ball valve, its sealing performance should be fully valued, and corresponding measures should be taken to ensure its long-term stable sealing effect. SUMMARY

[0004] In view of the above problem, the utility model provides a ball valve sealing device.

[0005] The utility model discloses a ball valve sealing device, including the ball valve body, the upper surface rotation of ball valve body is connected with the valve rod, the inside rotation of ball valve body is provided with the valve core, one end of valve rod is connected with the valve core, the inside of valve core is opened with the passageway for fluid flow, the both sides of ball valve body are fixedly connected with the connecting pipe, the both sides of ball valve body inside near connecting pipe are provided with first sealing ring, the inside wall of ball valve body is opened with the restriction groove corresponding the passageway of valve core, the first sealing pad is slidably connected in the restriction groove, the inside bottom of restriction groove is fixedly connected with the limit spring, the other end of limit spring is fixedly connected with the side of first sealing pad, the first sealing pad is adapted with the passageway of valve core, the side of first sealing pad near valve core is fixedly connected with second sealing ring, second sealing ring can be inserted into the passageway of valve core, the end of valve rod away from valve core is provided with anti -skid mechanism.

[0006] Preferably, the limit groove inner wall is provided with the second sealing pad, and the outer side surface of the second sealing pad is in abutment with the side surface of the first sealing pad.

[0007] Preferably, the outer side surface of the second sealing ring is in abutment with the inner wall of the passageway of the valve core.

[0008] Preferably, the first sealing pad is fixedly connected with a limiting elastic strip on both sides, the limiting groove inner wall is provided with a limiting channel corresponding to the limiting elastic strip on both sides, and the limiting elastic strip is slidably connected in the limiting channel.

[0009] Preferably, the anti-skid mechanism comprises a handle and an anti-skid sleeve, the valve rod is welded with the handle at one end away from the valve core, and the outer wall of the handle is sleeved with the anti-skid sleeve.

[0010] Preferably, a locking mechanism is arranged between the valve rod and the upper surface of the ball valve body, and the valve rod is limited and fixed in rotation.

[0011] Preferably, the locking mechanism comprises a brake table, a brake rod, a positioning rod, a limiting rod and a lock slot, the brake table is fixedly arranged on one side of the upper surface of the ball valve body, a sliding slot is formed in the brake table, the brake rod is slidingly connected in the sliding slot, a plurality of lock slots are arranged on the outer side of the valve rod in correspondence with the brake rod along the circumference, the lock slots are matched with the end of the brake rod, the positioning rod is fixedly connected to the upper surface of the brake rod, the limiting rod is rotatably connected to the upper surface of the brake table above the sliding slot, a positioning slot is formed in the limiting rod, and the end of the brake rod abuts in the lock slot to lock the valve rod when the positioning rod is inserted into the positioning slot.

[0012] Preferably, one side of the limiting rod is hinged to the upper surface of the brake table.

[0013] Preferably, the end face of the brake rod close to the lock slot is fixedly connected with an insertion block, and the insertion block is a regular quadrangular frustum.

[0014] Preferably, two locking mechanisms are arranged on the upper surface of the ball valve body.

[0015] The utility model discloses the beneficial effect is:

[0016] 1. The first sealing ring, the first sealing gasket and the second sealing ring are arranged, and the sealing performance of the ball valve is effectively improved. When the ball valve is opened, the limiting spring is pressed, the first sealing gasket and the second sealing ring are pressed, the first sealing gasket abuts against the side surface of the valve core, and the first sealing ring is further arranged to prevent fluid from flowing from the side. When the ball valve is closed, the external force for pressing the limiting spring disappears, the elastic force of the limiting spring drives the first sealing gasket and the second sealing ring to move towards the valve core, until the second sealing ring is inserted into the channel formed in the valve core, thereby sealing the channel, and the first sealing ring is further arranged to effectively improve the sealing performance of the ball valve.

[0017] 2. The locking mechanism is arranged, the rotation of the valve rod can be limited and fixed, the amplitude of the rotation of the valve rod can be adjusted to more accurately adjust the flow of fluid, the limiting rod is rotated to insert the positioning rod into the positioning slot, the insertion block at the end of the brake rod fixedly connected with the positioning rod is tightly abutted against the lock slot on the outer side of the valve rod, the friction force between the lock slot and the brake rod makes the valve rod stop rotating, the ball valve core fixedly connected with the valve rod also stops rotating, and then the ball valve core at any position in the rotation amplitude is locked, so that more accurate fluid adjustment can be realized. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the ball valve sealing device of this utility model;

[0019] Figure 2 This is a cross-sectional view of the ball valve body and the first sealing gasket of this utility model;

[0020] Figure 3 This is a cross-sectional view of the ball valve body of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the valve stem, valve core, and first sealing gasket of this utility model;

[0022] Figure 5 This is a schematic diagram of the locking mechanism of this utility model.

[0023] In the diagram: 1. Ball valve body; 11. Restriction groove; 12. Limiting channel; 2. Valve stem; 3. Valve core; 31. Channel; 4. Connecting pipe; 5. First sealing ring; 6. First sealing gasket; 61. Limiting spring; 62. Second sealing ring; 63. Limiting elastic strip; 7. Handle; 71. Anti-slip sleeve; 8. Locking mechanism; 81. Braking platform; 811. Slide groove; 82. Braking rod; 821. Insert block; 83. Positioning rod; 84. Limiting rod; 85. Locking groove. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0025] like Figures 1 to 5 As shown, this utility model is a ball valve sealing device, including a ball valve body 1, a valve stem 2 rotatably connected to the upper surface of the ball valve body 1, a valve core 3 rotatably disposed inside the ball valve body 1, one end of the valve stem 2 being fixedly connected to the valve core 3, and a channel 31 for fluid flow being opened inside the valve core 3. As is known to those skilled in the art, the sealing performance of existing ball valves is often insufficient, especially the lack of effective sealing between the channel 31 for fluid flow opened inside the valve core 3 and the inner wall of the ball valve.

[0026] Both sides of the ball valve body 1 are fixedly connected with the connecting pipes 4, the first sealing rings 5 are arranged on the two sides of the ball valve body 1 close to the connecting pipes 4, the limiting grooves 11 are arranged on the inner wall of the ball valve body 1 corresponding to the channels 31 in the valve core 3, the first sealing pads 6 are slidably connected in the limiting grooves 11, the limiting springs 61 are fixedly connected to the inner bottom of the limiting grooves 11, the other end of the limiting spring 61 is fixedly connected to the side of the first sealing pad 6, the first sealing pad 6 is matched with the channel 31 of the valve core 3, the second sealing ring 62 is fixedly connected to the side of the first sealing pad 6 close to the valve core 3, the second sealing ring 62 can be inserted into the channel 31 of the valve core 3, and the anti-skid mechanism is arranged on the end of the valve rod 2 away from the valve core 3.

[0027] The first sealing ring 5, the first sealing pad 6 and the second sealing ring 62 are arranged, so that the sealing performance of the ball valve is effectively improved.

[0028] In addition, in the embodiment, the second sealing pad is arranged on the inner wall of the limiting groove 11, the outer side of the second sealing pad is abutted with the side of the first sealing pad 6, and the outer side of the second sealing ring 62 is abutted with the inner wall of the channel 31 of the valve core 3.

[0029] Through the arrangement, the tightness of the first sealing pad 6 and the second sealing pad is further improved, so that the tightness between the first sealing pad 6 and the limiting groove is effectively improved; meanwhile, the second sealing ring 62 can tightly seal the channel 31 of the valve core 3, so that the sealing performance of the ball valve is effectively improved.

[0030] Meanwhile, in the embodiment, the limiting elastic strips 63 are fixedly connected to the two sides of the first sealing pad 6, the limiting channels 12 are arranged on the inner wall of the limiting groove 11 corresponding to the limiting elastic strips 63, and the limiting elastic strips 63 are slidably connected in the limiting channels 12.

[0031] Through the arrangement of the limiting elastic strips 63 and the limiting channels 12, the movement track of the first sealing pad 6 can be limited to a certain extent, and the deviation caused by shaking is prevented.

[0032] In addition, in the embodiment, the anti-skid mechanism comprises the handle 7 and the anti-skid sleeve 71, the handle 7 is welded to the end of the valve rod 2 away from the valve core 3, and the outer wall of the handle 7 is sleeved with the anti-skid sleeve 71.

[0033] By setting the anti-skid mechanism, the operator holds the handle 7 to facilitate the rotation of the valve stem 2, and the anti-skid sleeve 71 prevents the operator from slipping when rotating the valve stem 2 to a certain extent.

[0034] Moreover, in the present embodiment, a locking mechanism 8 is provided between the valve stem 2 and the upper surface of the ball valve body 1, which is used to limit and fix the rotation of the valve stem 2.

[0035] By setting the locking mechanism 8, not only can the rotation of the valve stem 2 be limited and fixed, but also the amplitude of the fixed rotation of the valve stem 2 can be adjusted to more accurately adjust the flow of the fluid.

[0036] Moreover, in the present embodiment, the locking mechanism 8 includes a brake table 81, a brake rod 82, a positioning rod 83, a limiting rod 84 and a lock slot 85, the brake table 81 is fixedly provided on one side of the upper surface of the ball valve body 1, a sliding groove 811 is formed on the brake table 81, the brake rod 82 is slidingly connected in the sliding groove 811, a plurality of lock slots 85 are provided on the outer side of the valve stem 2 corresponding to the brake rod 82 along the circumference, and the lock slots 85 are adapted to the end of the brake rod 82, the positioning rod 83 is fixedly connected to the upper surface of the brake rod 82, the limiting rod 84 is rotatably connected to the upper surface of the brake table 81 above the sliding groove 811, a positioning slot is formed on the limiting rod 84, and when the positioning rod 83 is inserted into the positioning slot, the end of the brake rod 82 abuts in the lock slot 85 to lock the valve stem 2, and one side of the limiting rod 84 is hinged to the upper surface of the brake table 81.

[0037] By rotating the limiting rod 84 to make the positioning rod 83 inserted into the positioning slot, the insertion block 821 at the end of the brake rod 82 fixedly connected with the positioning rod 83 is tightly abutted with the lock slot 85 on the outer side of the valve stem 2, the friction force generated between the lock slot 85 and the brake rod 82 makes the valve stem 2 stop rotating, and the ball valve core 3 fixedly connected with the valve stem 2 also synchronously stops rotating, thereby realizing the locking of the ball valve core 3 at any position within the rotation amplitude, and more accurate fluid adjustment can be achieved.

[0038] Moreover, in the present embodiment, the end face of the brake rod 82 close to the lock slot 85 is fixedly connected with an insertion block 821, and the insertion block 821 is a regular quadrangular pyramid.

[0039] By setting the insertion block 821, the insertion block 821 is a regular quadrangular pyramid, so that the insertion block 821 is provided with inclined surfaces around, which facilitates the insertion into the lock slot 85 to lock the valve stem 2.

[0040] Moreover, in the present embodiment, the locking mechanism 8 is provided with two, and the two locking mechanisms 8 are symmetrically provided on the upper surface of the ball valve body 1.

[0041] By symmetrically setting the locking mechanism 8, the two locking mechanisms 8 symmetrically provided on the upper surface of the ball valve body 1 can better limit and fix the rotation of the valve stem 2.

[0042] In use, when the ball valve is opened, the limiting spring 61 is pressed, the first sealing gasket 6 and the second sealing ring 62 are pressed, the first sealing gasket 6 abuts against the side surface of the valve core 3, and the first sealing ring 5 cooperates to effectively prevent fluid from flowing from the side; when the ball valve is closed, the external force pressing the limiting spring 61 disappears, the elastic force of the limiting spring 61 drives the first sealing gasket 6 and the second sealing ring 62 to move towards the valve core 3, until the second sealing ring 62 is inserted into the channel 31 formed in the valve core 3, thereby sealing the channel 31, and the first sealing ring 5 cooperates to effectively improve the sealing performance of the ball valve; by rotating the limiting rod 84, the positioning rod 83 is inserted into the positioning groove, the insertion block 821 fixedly connected with the positioning rod 83 abuts against the locking groove 85 on the outer side surface of the valve rod 2, the friction force between the locking groove 85 and the brake rod 82 makes the valve rod 2 stop rotating, the ball valve core 3 fixedly connected with the valve rod 2 also synchronously stops rotating, thereby realizing the locking of the ball valve core 3 at any position within the rotation range, and more accurate fluid regulation can be realized.

[0043] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A ball valve sealing device, comprising a ball valve body (1), a valve stem (2) rotatably connected to the upper surface of the ball valve body (1), a valve core (3) rotatably disposed inside the ball valve body (1), one end of the valve stem (2) being fixedly connected to the valve core (3), and a channel (31) for fluid flow being provided inside the valve core (3), characterized in that: Both sides of the ball valve body (1) are fixedly connected with connecting pipes (4), the first sealing ring (5) is arranged on the both sides of the ball valve body (1) and close to the connecting pipes (4), the limiting groove (11) is arranged on the inner wall of the ball valve body (1) and corresponds to the channel (31) in the valve core (3), the first sealing pad (6) is slidably connected in the limiting groove (11), the limiting spring (61) is fixedly connected to the inner bottom of the limiting groove (11), the other end of the limiting spring (61) is fixedly connected to the side of the first sealing pad (6), the first sealing pad (6) is matched with the channel (31) of the valve core (3), the second sealing ring (62) is fixedly connected to the side of the first sealing pad (6) and close to the valve core (3), the second sealing ring (62) can be inserted into the channel (31) of the valve core (3), the anti-skid mechanism is arranged on the end of the valve rod (2) and away from the valve core (3).

2. A ball valve sealing device according to claim 1, wherein: The second sealing pad is arranged on the inner wall of the limiting groove (11), and the outer side of the second sealing pad is in abutment with the side of the first sealing pad (6).

3. A ball valve sealing device according to claim 1, wherein: The outer side of the second sealing ring (62) is in abutment with the inner wall of the channel (31) of the valve core (3).

4. A ball valve sealing device according to claim 1, wherein: The limiting elastic strips (63) are fixedly connected to the both sides of the first sealing pad (6), the limiting grooves (12) are arranged on the both sides of the inner wall of the limiting groove (11) and correspond to the limiting elastic strips (63), and the limiting elastic strips (63) are slidably connected in the limiting grooves (12).

5. A ball valve sealing device according to claim 1, wherein: The anti-skid mechanism comprises a handle (7) and an anti-skid sleeve (71), the handle (7) is welded to the end of the valve rod (2) and away from the valve core (3), and the outer wall of the handle (7) is sleeved with the anti-skid sleeve (71).

6. A ball valve sealing device according to claim 1, wherein: The locking mechanism (8) is arranged between the valve rod (2) and the upper surface of the ball valve body (1) and is used for limiting and fixing the rotation of the valve rod (2).

7. A ball valve sealing device according to claim 6, wherein: The locking mechanism (8) comprises a brake table (81), a brake rod (82), a positioning rod (83), a limiting rod (84) and a lock groove (85), the brake table (81) is fixedly arranged on one side of the upper surface of the ball valve body (1), the slide groove (811) is arranged on the brake table (81), the brake rod (82) is slidably connected in the slide groove (811), a plurality of lock grooves (85) are arranged on the outer side of the valve rod (2) and correspond to the brake rod (82) along the circumference, the lock grooves (85) are matched with the end of the brake rod (82), the positioning rod (83) is fixedly connected to the upper surface of the brake rod (82), the limiting rod (84) is rotatably connected to the upper surface of the brake table (81) and above the slide groove (811), the positioning groove is arranged on the limiting rod (84), and when the positioning rod (83) is inserted into the positioning groove, the end of the brake rod (82) is in abutment with the lock groove (85) to lock the valve rod (2).

8. A ball valve sealing device according to claim 7, wherein: One side of the limiting rod (84) is hinged to the upper surface of the brake table (81).

9. A ball valve sealing device according to claim 8, wherein: The end face of the brake rod (82) close to the lock groove (85) is fixedly connected with the insertion block (821), and the insertion block (821) is a regular quadrangular frustum.

10. A ball valve sealing device according to claim 9, wherein: The locking mechanism (8) is provided with two locking mechanisms (8) which are symmetrically arranged on the upper surface of the ball valve body (1).

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