Leak-proof stop valve

Abstract

The utility model relates to the technical field of stop valves, and provides a leakproof stop valve which comprises a valve body, a valve rod arranged in the valve body, a valve clack arranged at the lower end of the valve rod, an elastic sealing ring sleeved on the outer side of the valve clack, a sliding sleeve sleeved on the valve rod in a sliding mode, a spring fixedly connected with the lower end of the sliding sleeve, and the lower end of the spring fixedly connected with the upper surface of the valve clack. A plurality of connecting rods are circularly distributed on the outer side wall of the sliding sleeve in a hinged mode at equal intervals, clamping blocks are hinged to one ends of the connecting rods respectively, and the valve rod is sleeved with a threaded sleeve in a threaded mode. According to the leak-proof stop valve, the threaded sleeve rotates downwards to drive the sliding sleeve to slide downwards, and the sliding sleeve drives the clamping blocks to rotate downwards through the connecting rods, so that the elastic sealing ring can be conveniently clamped and fixed through the clamping blocks; the problem that in the prior art, when a valve clack and a valve seat are sealed, extrusion acting force is generated on an elastic sealing ring, and the elastic sealing ring is prone to falling off is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of globe valves, and specifically, to a globe valve with leakage prevention. Background Art

[0002] The globe valve belongs to a forced-sealing valve. At present, the bottom surface of the valve flap of the globe valve is mostly a conical surface, and the conical surface on the valve flap is abutted and pressed against the conical surface on the valve sleeve to achieve the sealing of the globe valve.

[0003] After retrieval, the existing patent (Publication No.: CN219345535U) discloses a globe valve with leakage prevention, which relates to the technical field of globe valves. Through the arrangement of an elastic sealing ring, when the lower end of the valve flap closes the through hole on the valve seat under the pressure of the valve rod, a flexible seal is achieved between the valve flap and the inclined surface of the valve seat, greatly reducing the mutual wear between the valve flap and the valve seat. At the same time, the deformation holes increase the deformation degree of the elastic sealing ring, making it easier for the elastic sealing ring to fit with the inner side wall of the through hole of the valve seat. When the inner side wall of the through hole of the valve seat is worn by the conveyed medium, the elastic sealing ring can still achieve a good sealing effect under the action of pressure, and the elastic sealing ring can be replaced in time when worn, greatly reducing the maintenance cost compared with replacing the entire valve flap. Thus, while achieving a good leakage prevention effect, the maintenance cost of the globe valve is reduced. At the same time, the reinforcing ribs enhance the structural strength at the edge of the valve flap, making the valve flap not easily deformed and avoiding the leakage of the medium.

[0004] However, it is found that the following problems exist in the implementation of the related technology: During the operation of the above globe valve to achieve the sealing between the valve flap and the valve seat, the elastic sealing ring bears a significant extrusion force. Given the high elastic deformation characteristics of the elastic sealing ring, when it is subjected to an external extrusion force, it is extremely easy to deform. This deformation may cause the elastic sealing ring to separate from some areas of the inner wall of the installation groove on the outer side of the valve flap, thereby increasing the probability of the elastic sealing ring falling off, which has an adverse impact on the sealing performance. Summary of the Utility Model

[0005] The utility model provides a globe valve with leakage prevention, which solves the problem that the elastic sealing ring is prone to fall off due to the extrusion force generated during the sealing between the valve flap and the valve seat in the related technology.

[0006] The technical solution of the present utility model is as follows: A globe valve with anti-leakage function includes a valve body, a valve stem is arranged inside the valve body, a valve flap is arranged at the lower end of the valve stem, an elastic sealing ring is sleeved outside the valve flap, a sliding sleeve is slidably sleeved on the valve stem, a spring is fixedly connected to the lower end of the sliding sleeve, and the lower end of the spring is fixedly connected to the upper surface of the valve flap. The spring is sleeved on the valve stem. A plurality of connecting rods are evenly hinged on the outer side wall of the sliding sleeve in a circular distribution at equal intervals. One ends of the plurality of connecting rods are respectively hinged with clamping blocks, and the lower ends of the plurality of clamping blocks are respectively hinged on the upper surface of the valve flap. A threaded sleeve is threadedly sleeved on the valve stem, and the threaded sleeve is located directly above the sliding sleeve.

[0007] Preferably, each of the plurality of clamping blocks has a V-shaped structure, and the end portions of the outer walls of the plurality of clamping blocks are all rounded structures.

[0008] Preferably, protrusions are respectively fixedly connected to one sides of the inner walls of the plurality of clamping blocks close to the elastic sealing ring, and the plurality of protrusions are all arc-shaped structures.

[0009] Preferably, a plurality of balls are arranged on the lower surface of the threaded sleeve, and the plurality of balls are arranged in a circular distribution at equal intervals on the lower surface of the threaded sleeve.

[0010] Preferably, a groove is formed on the outer side wall of the threaded sleeve, and a reinforcement mechanism for reinforcing the threaded sleeve is arranged in the groove. The reinforcement mechanism includes a connecting plate fixedly connected to the inner side wall of the groove. A threaded rod is threadedly connected to the inner wall of the connecting plate. One end of the threaded rod extends outside the groove and is fixedly connected to a knob, and the other end of the threaded rod extends into the groove and is rotatably connected to a pressing block through a rotating mechanism.

[0011] Preferably, the rotating mechanism includes a circular groove body and a rotating plate. The circular groove body is fixedly connected to one side of the pressing block, and the rotating plate is fixedly connected to the other end of the threaded rod.

[0012] Preferably, the rotating plate has a circular structure, and the rotating plate is rotatably connected in the circular groove body.

[0013] Preferably, a notch is formed on one side of the pressing block close to the valve stem, and the notch is an arc-shaped structure.

[0014] The working principle and beneficial effects of the present utility model are as follows:

[0015] In the present utility model, by rotating the threaded sleeve downward to drive the sliding sleeve to slide downward, the sliding sleeve will drive several clamping blocks to rotate downward respectively through several connecting rods, so that the elastic sealing ring can be conveniently clamped and fixed by the several clamping blocks, improving the stability of the elastic sealing ring installed on the valve flap, preventing the elastic sealing ring from falling off due to the extrusion force generated when the valve flap and the valve seat are sealed, and thus ensuring the sealing effect of the elastic sealing ring, and solving the problem that the elastic sealing ring is prone to falling off due to the extrusion force generated when the valve flap and the valve seat are sealed in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0017] Figure 1 is a schematic diagram of the overall structure of a leak-proof globe valve proposed by the present utility model;

[0018] Figure 2 is a schematic diagram of the structure of a leak-proof globe valve proposed by the present utility model when clamping the elastic sealing ring;

[0019] Figure 3 is Figure 2 the bottom view of the structure;

[0020] Figure 4 is a schematic diagram of the structure of the sliding sleeve, spring, connecting rod and clamping block of a leak-proof globe valve proposed by the present utility model;

[0021] Figure 5 is a schematic diagram of the structure of the threaded sleeve of a leak-proof globe valve proposed by the present utility model;

[0022] Figure 6 is a schematic diagram of the structure of the reinforcement mechanism of a leak-proof globe valve proposed by the present utility model;

[0023] Figure 7 is a schematic cross-sectional view of the structure of a leak-proof globe valve proposed by the present utility model when the elastic sealing ring is not clamped;

[0024] Figure 8 is Figure 7 the enlarged schematic diagram of the structure of part A in

[0025] In the figure: 1, valve body; 2, valve stem; 3, valve flap; 4, elastic sealing ring; 5, valve seat; 6, sliding sleeve; 7, spring; 8, connecting rod; 9, clamping block; 10, threaded sleeve; 11, protrusion; 12, ball; 13, groove; 14, connecting plate; 15, threaded rod; 16, knob; 17, extrusion block; 18, notch; 19, circular groove body; 20, rotating plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 , the present utility model provides a technical solution: a globe valve for preventing leakage, including a valve body 1, a valve stem 2 is arranged in the valve body 1, a valve flap 3 is arranged at the lower end of the valve stem 2, an elastic sealing ring 4 is sleeved outside the valve flap 3, a sliding sleeve 6 is slidably sleeved on the valve stem 2, a spring 7 is fixedly connected to the lower end of the sliding sleeve 6, and the lower end of the spring 7 is fixedly connected to the upper surface of the valve flap 3. The spring 7 is sleeved on the valve stem 2. A plurality of connecting rods 8 are evenly hinged in a circular distribution on the outer side wall of the sliding sleeve 6. One ends of the plurality of connecting rods 8 are respectively hinged with clamping blocks 9, and the lower ends of the plurality of clamping blocks 9 are respectively hinged on the upper surface of the valve flap 3. A threaded sleeve 10 is threadedly sleeved on the valve stem 2, and the threaded sleeve 10 is located directly above the sliding sleeve 6.

[0028] The plurality of clamping blocks 9 are all of V-shaped structures, and the ends of the outer walls of the plurality of clamping blocks 9 are all of rounded corner structures. A protrusion 11 is fixedly connected to one side of the inner wall of each of the plurality of clamping blocks 9 close to the elastic sealing ring 4, and the plurality of protrusions 11 are all of arc-shaped structures. Through the arrangement of the protrusions 11, the elastic sealing ring 4 can be more firmly clamped and fixed.

[0029] A plurality of balls 12 are arranged on the lower surface of the threaded sleeve 10, and the plurality of balls 12 are evenly arranged in a circular distribution on the lower surface of the threaded sleeve 10. Through the arrangement of the balls 12, the abrasion generated between the lower surface of the threaded sleeve 10 and the upper surface of the sliding sleeve 6 can be reduced, and its service life can be prolonged.

[0030] During use, after installing the elastic sealing ring 4 in the installation groove outside the valve flap 3, rotate the threaded sleeve 10 downward. The threaded sleeve 10 will drive the sliding sleeve 6 to slide downward. During the downward sliding of the sliding sleeve 6, it will respectively push several connecting rods 8 outward. The several connecting rods 8 will respectively push several clamping blocks 9 to rotate downward, and finally the several clamping blocks 9 will clamp and fix the elastic sealing ring 4, preventing the elastic sealing ring 4 from falling off due to the extrusion force generated when the valve flap 3 is sealed with the valve seat 5; when it is necessary to remove the elastic sealing ring 4, just rotate the threaded sleeve 10 upward. Under the elastic force of the spring 7, the sliding sleeve 6 will automatically slide upward. The sliding sleeve 6 will respectively drive the several clamping blocks 9 to rotate upward through the several connecting rods 8, and finally the several clamping blocks 9 will loosen the elastic sealing ring 4, and then the elastic sealing ring 4 can be disassembled. Therefore, by rotating the threaded sleeve 10 downward to drive the sliding sleeve 6 to slide downward, the sliding sleeve 6 will respectively drive the several clamping blocks 9 to rotate downward through the several connecting rods 8, so that the elastic sealing ring 4 can be conveniently clamped and fixed by the several clamping blocks 9, improving the stability of the elastic sealing ring 4 installed on the valve flap 3, preventing the elastic sealing ring 4 from falling off due to the extrusion force generated when the valve flap 3 is sealed with the valve seat 5, and further ensuring the sealing effect of the elastic sealing ring 4, and solving the problem that the valve flap 3 and the valve seat 5 in the related technology will generate an extrusion force on the elastic sealing ring 4 during sealing and easily cause it to fall off.

[0031] Refer to Figure 5 , Figure 6 , Figure 7 and Figure 8 , a groove 13 is provided on the outer side wall of the threaded sleeve 10, and a reinforcement mechanism for reinforcing the threaded sleeve 10 is arranged in the groove 13. The reinforcement mechanism includes a connecting plate 14, the connecting plate 14 is fixedly connected to the inner side wall of the groove 13, a threaded rod 15 is threadedly connected to the inner wall of the connecting plate 14, one end of the threaded rod 15 extends outside the groove 13 and is fixedly connected with a knob 16, and the other end of the threaded rod 15 extends into the groove 13 and is rotationally connected with a pressing block 17 through a rotating mechanism.

[0032] The rotating mechanism includes a circular groove body 19 and a rotating plate 20. The circular groove body 19 is fixedly connected to one side of the pressing block 17, the rotating plate 20 is fixedly connected to the other end of the threaded rod 15, the rotating plate 20 is of a circular structure, and the rotating plate 20 is rotationally connected in the circular groove body 19, so that the rotational connection relationship between the threaded rod 15 and the pressing block 17 can be realized.

[0033] An indentation 18 is provided on the side of the pressing block 17 close to the valve stem 2, and the indentation 18 is of an arc structure. When the pressing block 17 presses the valve stem 2, the arc-shaped indentation 18 can directly fit with the side wall of the valve stem 2, which can improve the stability when the pressing block 17 reinforces the threaded sleeve 10.

[0034] After clamping and fixing the elastic sealing ring 4 with several clamping blocks 9, by rotating the knob 16, the knob 16 drives the threaded rod 15 to rotate into the groove 13. The threaded rod 15 drives the extrusion block 17 to move linearly inward, and finally the notch 18 of the extrusion block 17 tightly presses against the side wall of the valve stem 2, thereby strengthening the threaded sleeve 10, preventing the threaded sleeve 10 from loosening, and further improving the stability when several clamping blocks 9 clamp and fix the elastic sealing ring 4. When it is necessary to remove the elastic sealing ring 4, first reverse-rotate the knob 16. Similarly, the extrusion block 17 releases the valve stem 2, and then the threaded sleeve 10 can be rotated upward.

[0035] The working principle and usage process of the present utility model: When in use, after installing the elastic sealing ring 4 in the installation groove outside the valve flap 3, rotate the threaded sleeve 10 downward. The threaded sleeve 10 drives the sliding sleeve 6 to slide downward. During the downward sliding process of the sliding sleeve 6, several connecting rods 8 are respectively pushed outward. Several connecting rods 8 respectively push several clamping blocks 9 to rotate downward, and finally several clamping blocks 9 clamp and fix the elastic sealing ring 4, preventing the elastic sealing ring 4 from falling off due to the extrusion force generated when the valve flap 3 seals with the valve seat 5. Then, by rotating the knob 16, the knob 16 drives the threaded rod 15 to rotate into the groove 13. The threaded rod 15 drives the extrusion block 17 to move linearly inward, and finally the notch 18 of the extrusion block 17 tightly presses against the side wall of the valve stem 2, thereby strengthening the threaded sleeve 10, preventing the threaded sleeve 10 from loosening, and further improving the stability when several clamping blocks 9 clamp and fix the elastic sealing ring 4. When it is necessary to remove the elastic sealing ring 4, first reverse-rotate the knob 16. Similarly, the extrusion block 17 releases the valve stem 2. Then, just rotate the threaded sleeve 10 upward. Under the elastic force of the spring 7, the sliding sleeve 6 will automatically slide upward. The sliding sleeve 6 drives several clamping blocks 9 to rotate upward through several connecting rods 8 respectively, and finally several clamping blocks 9 release the elastic sealing ring 4, and the elastic sealing ring 4 can be disassembled.

[0036] The above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A leak-proof globe valve, comprising a valve body (1), a valve stem (2) is arranged inside the valve body (1), a valve flap (3) is arranged at the lower end of the valve stem (2), and an elastic sealing ring (4) is sleeved outside the valve flap (3), characterized in that: A sliding sleeve (6) is sleeved on the valve stem (2). A spring (7) is fixedly connected to the lower end of the sliding sleeve (6), and the lower end of the spring (7) is fixedly connected to the upper surface of the valve flap (3). The spring (7) is sleeved on the valve stem (2). A plurality of connecting rods (8) are evenly hinged on the outer side wall of the sliding sleeve (6) in a circular distribution. One end of each of the plurality of connecting rods (8) is respectively hinged with a clamping block (9), and the lower ends of the plurality of clamping blocks (9) are respectively hinged to the upper surface of the valve flap (3). A threaded sleeve (10) is threadedly sleeved on the valve stem (2), and the threaded sleeve (10) is located directly above the sliding sleeve (6).

2. The anti-leakage stop valve according to claim 1, characterized in that: Each of the plurality of clamping blocks (9) has a V-shaped structure, and the ends of the outer walls of the plurality of clamping blocks (9) are all rounded structures.

3. The anti-leakage stop valve according to claim 2, characterized in that: A plurality of protrusions (11) are respectively fixedly connected to one side of the inner walls of the plurality of clamping blocks (9) close to the elastic sealing ring (4), and each of the plurality of protrusions (11) has an arc-shaped structure.

4. The leak-proof stop valve according to claim 1, characterized in that: A plurality of balls (12) are arranged on the lower surface of the threaded sleeve (10), and the plurality of balls (12) are evenly arranged in a circular distribution on the lower surface of the threaded sleeve (10).

5. The anti-leakage stop valve according to claim 4, characterized in that: A groove (13) is formed on the outer side wall of the threaded sleeve (10). A reinforcing mechanism for reinforcing the threaded sleeve (10) is arranged in the groove (13). The reinforcing mechanism includes a connecting plate (14) fixedly connected to the inner side wall of the groove (13). A threaded rod (15) is threadedly connected to the inner wall of the connecting plate (14). One end of the threaded rod (15) extends outside the groove (13) and is fixedly connected to a knob (16). The other end of the threaded rod (15) extends into the groove (13) and is rotatably connected to a pressing block (17) through a rotating mechanism.

6. The leak-proof stop valve according to claim 5, wherein: The rotating mechanism includes a circular groove body (19) and a rotating plate (20). The circular groove body (19) is fixedly connected to one side of the pressing block (17), and the rotating plate (20) is fixedly connected to the other end of the threaded rod (15).

7. The anti-leakage stop valve according to claim 6, wherein: The rotating plate (20) has a circular structure, and the rotating plate (20) is rotatably connected in the circular groove body (19).

8. The anti-leakage stop valve according to claim 6, wherein: A notch (18) is formed on one side of the pressing block (17) close to the valve stem (2), and the notch (18) has an arc-shaped structure.

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