Sealing structure of valve plug

Abstract

The utility model discloses a sealing structure of a valve cock, and particularly relates to the technical field of valve sealing, the sealing structure comprises a shell, the inner wall of the shell is rotatably connected with a rotating shaft, the two sides of the rotating shaft are fixedly connected with valve clacks, one side of each valve clack is provided with a sealing backing ring fixedly connected with the shell, and the top end of the rotating shaft is provided with a standby rotating assembly; the standby rotating assembly comprises a linkage rotating shaft arranged at the top end of the rotating shaft, the outer wall of the linkage rotating shaft is fixedly connected with a grip, and the grip is rotationally connected with the top end of the shell. And the top end of the linkage rotating shaft is concentrically and fixedly connected with a rotating rod. The standby rotating assembly is adopted, when the grip is broken and damaged, the rotating cap is rotated, the rotating cap drives the rotating rod to enable the linkage rotating shaft to rotate, when the rotating rod is damaged, the small rotating cap is rotated to drive the linkage rod to rotate, or the large rotating cap is rotated to drive the linkage bottom shaft to rotate, and valve cock operation is carried out in time in an emergency. And the standby emergency use effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of valve sealing, and more specifically, to a sealing structure of a valve cock. Background Art

[0002] The sealing structure of the valve plug is mainly used in the following aspects: to prevent medium leakage. The sealing structure effectively prevents medium leakage from the valve by ensuring the close fit between the valve core, valve seat and seal of the plug valve.

[0003] After searching the existing published documents, the Chinese patent publication number CN109163120A discloses a swinging half-body valve core plug valve. This technology enables the valve to quickly complete the opening and closing operation, and has a compact structure, small size, easy, smooth and safe use, small flow resistance, not easy to cause blockage, and easy to realize automatic operation; however, the valve core plug valve has the following defects.

[0004] When the valve core plug valve is in use, although the valve core plug valve is rotated by the handle, once the handle is broken or damaged by force, it is difficult to achieve backup rotation, which makes it difficult to operate the valve plug in time, and the backup emergency use effect is poor. Therefore, a sealing structure of a valve plug is provided. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a sealing structure of a valve cock.

[0006] To achieve the above object, the utility model provides the following technical solutions: a sealing structure of a valve cock, comprising a housing, the inner wall of the housing is rotatably connected to a rotating shaft, both sides of the rotating shaft are fixedly connected to valve discs, a sealing gasket ring fixedly connected to the housing is provided on one side of the valve disc, and a spare rotating assembly is provided on the top of the rotating shaft;

[0007] The spare rotating assembly includes a linkage rotating shaft arranged at the top of the rotating shaft, and a handle is fixedly connected to the outer wall of the linkage rotating shaft, and the handle is rotatably connected to the top of the shell; a rotating rod is fixedly connected to the top of the linkage rotating shaft concentrically, and a rotating cap is fixedly installed on the top of the rotating rod; the bottom end of the rotating shaft extends to the bottom of the shell and is welded with a linkage bottom shaft, and a large rotating cap is fixedly connected to the bottom end of the linkage bottom shaft.

[0008] Preferably, the two valve flaps are symmetrically arranged about the rotating shaft, and the two valve flaps are rotatably connected to the sealing gasket ring. The outer walls of the rotating shaft and the linkage bottom shaft are rotatably connected to the shell. The center point of the rotating shaft and the center point of the linkage bottom shaft are on the same vertical line. A linkage rod is welded to the bottom end of the large rotating cap, and a small rotating cap is fixedly connected to the bottom end of the linkage rod. Both ends of the shell are integrally formed with flanges by die-casting, and a plurality of mounting holes are embedded on one side of each flange.

[0009] When the upper structure is in use, the linkage shaft rotates inside the shell, the shaft rotates on the two valve discs, and the two valve discs rotate and seal on the sealing gasket ring. When the handle is broken or damaged, the linkage shaft drives the shaft to rotate by rotating the rotating cap, and the shaft drives the two valve discs to rotate. When the rotating rod is damaged, the linkage rod is driven to rotate by rotating the small rotating cap, the linkage rod causes the large rotating cap to rotate, and the large rotating cap drives the linkage bottom shaft to make the shaft inside the shell, or the linkage bottom shaft is driven to rotate by rotating the large rotating cap.

[0010] Preferably, both sides of the sealing gasket ring are provided with limiting rings fixedly connected to the housing;

[0011] The inner wall of the limit ring is provided with a support and limit assembly; the support and limit assembly includes support blocks fixedly arranged on the inner walls of multiple limit rings, and a sleeve block fixedly connected to the limit ring is provided between two adjacent support blocks, and a positioning rod is welded on the inner wall of the sleeve block, and the outer wall of the positioning rod is fixedly connected to the limit support ring on one side of the sleeve block, and the multiple support blocks are arranged in a circular ring with equal distances, and the vertical sections of the multiple support blocks are all set to be semicircular.

[0012] When the upper structure is in use, the limiting ring realizes a limiting operation on the sealing gasket ring, the limiting ring supports multiple supporting blocks, the positioning rod supports the limiting support ring, the limiting support ring supports the sleeve block, and the multiple sleeve blocks can provide limiting operations for the sealing gasket ring, and firmly limit the position of the sealing gasket ring.

[0013] Technical effects and advantages of the utility model:

[0014] 1. The utility model adopts a spare rotating assembly. When the handle is broken or damaged, the rotating cap is rotated, and the rotating cap drives the rotating rod to rotate the linkage rotating shaft. When the rotating rod is damaged, the linkage rod is rotated by rotating the small rotating cap, or the linkage bottom shaft is rotated by rotating the large rotating cap. The rotating shaft can be rotated in an emergency in a variety of ways to ensure that the valve disc and the sealing gasket ring can achieve the sealing of the valve cock. The valve cock can be operated in an emergency in time, and the spare emergency use effect is better;

[0015] 2. The utility model adopts a support and limiting assembly, which supports a limiting ring through the shell, and the limiting ring realizes a limiting operation on the sealing gasket ring. Multiple support blocks can provide limiting support force for the sealing gasket ring. The limiting support ring supports the sleeve block, and the sleeve block provides support for the limiting ring to avoid shaking damage to the sealing gasket ring and improve the stability of the sealing gasket ring during sealing use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of the sealing structure of the valve cock of the utility model.

[0017] Figure 2 It is a schematic diagram of the partial structure of the connection between the shell and the linkage shaft of the utility model.

[0018] Figure 3 It is a schematic diagram of a partial structure of the connection between the rotating shaft and the housing of the utility model.

[0019] Figure 4 It is a schematic diagram of the local structure of the connection between the limit ring and the support block of the utility model.

[0020] Figure 5 It is a schematic diagram of the local structure of the connection between the limit ring and the sleeve block of the utility model.

[0021] The accompanying drawings are marked as follows: 1. housing; 2. rotating shaft; 3. sealing gasket; 4. linked rotating shaft; 5. handle; 6. rotating rod; 7. rotating cap; 8. linked bottom shaft; 9. large rotating cap; 10. linked rod; 11. small rotating cap; 12. flange; 13. mounting hole; 14. limiting ring; 15. supporting block; 16. sleeve block; 17. positioning rod; 18. limiting support ring; 19. valve disc. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] As attached Figure 1-5 A sealing structure of a valve plug is shown, and a spare rotating component is arranged on the sealing structure of the valve plug. The arrangement of the spare rotating component can realize emergency rotation of the rotating shaft 2 in a variety of ways, ensuring that the valve disc 19 and the sealing gasket ring 3 realize the sealing of the valve plug, and the valve plug can be operated in time for emergency. The spare emergency use effect is better. The specific structural arrangement of each mechanism and component is as follows.

[0024] In this technical solution, as shown in the attached Figure 1-3 As shown, the spare rotating assembly includes a linkage rotating shaft 4 arranged at the top of the rotating shaft 2, and the outer wall of the linkage rotating shaft 4 is fixedly connected with a handle 5, and the handle 5 is rotatably connected to the top of the shell 1; the top of the linkage rotating shaft 4 is cocentrically fixedly connected with a rotating rod 6, and the top of the rotating rod 6 is fixedly installed with a rotating cap 7; the bottom end of the rotating shaft 2 extends to the bottom of the shell 1 and is welded with a linkage bottom shaft 8, and the bottom end of the linkage bottom shaft 8 is fixedly connected with a large rotating cap 9.

[0025] When the present technical solution is used, the handle 5 is held by hand, and the handle 5 drives the linkage shaft 4 to rotate, and the linkage shaft 4 rotates inside the housing 1, and the linkage shaft 4 drives the shaft 2 to rotate. The shaft 2 rotates on the two valve flaps 19, and the two valve flaps 19 rotate and seal on the sealing gasket ring 3. When the handle 5 is broken or damaged, the rotating cap 7 is rotated, and the rotating cap 7 drives the rotating rod 6 to rotate the linkage shaft 4, and the linkage shaft 4 drives the shaft 2 to rotate, and the shaft 2 drives the two valve flaps 19 to rotate. When the rotating rod 6 is damaged, the small rotating cap 11 is rotated to drive the linkage rod 10 to rotate, and the linkage rod 10 drives the large rotating cap 9 to rotate, and the large rotating cap 9 drives the linkage bottom shaft 8 to make the shaft 2 inside the housing 1, or the large rotating cap 9 is rotated to drive the linkage bottom shaft 8 to rotate, and the linkage bottom shaft 8 carries the shaft 2 to rotate inside the housing 1.

[0026] In this technical solution, as shown in the attached Figure 1-3 As shown, a linkage rod 10 is welded to the bottom end of the large rotating cap 9, and a small rotating cap 11 is fixedly connected to the bottom end of the linkage rod 10. In order to facilitate the linkage rod 10 to rotate the large rotating cap 9, the large rotating cap 9 drives the linkage bottom shaft 8 to make the rotating shaft 2 inside the housing 1, and realize the rotation operation of the linkage rod 10. Both ends of the housing 1 are integrally formed with flanges 12 by die casting, and one side of each flange 12 is embedded with a plurality of mounting holes 13. In order to facilitate the flange 12 to dock with the pipeline, the bolt installation operation is realized after docking through the plurality of mounting holes 13, thereby realizing the fixing operation of the flange 12.

[0027] In this technical solution, as shown in the attached Figure 1-5 As shown, both sides of the sealing gasket ring 3 are provided with a limit ring 14 fixedly connected to the shell 1; the inner wall of the limit ring 14 is provided with a support limit assembly; the support limit assembly includes a support block 15 fixedly arranged on the inner wall of a plurality of limit rings 14, and a sleeve block 16 fixedly connected to the limit ring 14 is provided between two adjacent support blocks 15, a positioning rod 17 is welded to the inner wall of the sleeve block 16, and a limiting support ring 18 is fixedly connected to the outer wall of the positioning rod 17 and located on one side of the sleeve block 16, and the plurality of support blocks 15 are arranged in a circular ring with equal spacing, and the vertical sections of the plurality of support blocks 15 are all set to be semicircular.

[0028] When the present technical solution is used, the limiting ring 14 is supported by the shell 1, and the limiting ring 14 performs a limiting operation on the sealing gasket ring 3. At the same time, the limiting ring 14 supports multiple support blocks 15, and the multiple support blocks 15 can provide limiting support force for the sealing gasket ring 3. The positioning rod 17 supports the limiting support ring 18, and the limiting support ring 18 supports the sleeve block 16. The sleeve block 16 provides support for the limiting ring 14, and the multiple sleeve blocks 16 can provide limiting operation for the sealing gasket ring 3, and can firmly limit the position of the sealing gasket ring 3.

[0029] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing structure for a valve cock, comprising a housing (1), an inner wall of the housing (1) being rotatably connected to a rotating shaft (2), both sides of the rotating shaft (2) being fixedly connected to valve flaps (19), and a sealing gasket (3) fixedly connected to the housing (1) being provided on one side of the valve flap (19), characterized in that: A spare rotating assembly is provided at the top end of the rotating shaft (2); The standby rotating assembly comprises a linkage rotating shaft (4) arranged at the top end of the rotating shaft (2), and a handle (5) is fixedly connected to the outer wall of the linkage rotating shaft (4), and the handle (5) is rotatably connected to the top end of the housing (1); The top end of the linkage rotating shaft (4) is cocentrically fixedly connected to a rotating rod (6), and the top end of the rotating rod (6) is fixedly mounted with a rotating cap (7); The bottom end of the rotating shaft (2) extends to the bottom of the housing (1) and is welded with a linkage bottom shaft (8), and the bottom end of the linkage bottom shaft (8) is fixedly connected with a large rotating cap (9).

2. A sealing structure for a valve cock according to claim 1, characterized in that: The two valve flaps (19) are symmetrically arranged about the rotating shaft (2), and the two valve flaps (19) are both rotatably connected to the sealing gasket ring (3).

3. The sealing structure of a valve cock according to claim 1, characterized in that: The outer walls of the rotating shaft (2) and the linkage bottom shaft (8) are both rotatably connected to the housing (1), and the center point of the rotating shaft (2) and the center point of the linkage bottom shaft (8) are located on the same vertical line.

4. The sealing structure of a valve cock according to claim 1, characterized in that: A linkage rod (10) is welded to the bottom end of the large rotating cap (9), and a small rotating cap (11) is fixedly connected to the bottom end of the linkage rod (10).

5. The sealing structure of a valve cock according to claim 1, characterized in that: Both ends of the housing (1) are integrally formed with flanges (12) by die-casting, and a plurality of mounting holes (13) are embedded in one side of each flange (12).

6. The sealing structure of a valve cock according to claim 1, characterized in that: Both sides of the sealing gasket ring (3) are provided with limiting rings (14) fixedly connected to the housing (1); The inner wall of the limiting ring (14) is provided with a supporting limiting component; The support and limiting assembly comprises a support block (15) fixedly arranged on the inner walls of a plurality of limiting rings (14); a sleeve block (16) fixedly connected to the limiting ring (14) is provided between two adjacent support blocks (15); a positioning rod (17) is welded to the inner wall of the sleeve block (16); and a limiting support ring (18) is fixedly connected to the outer wall of the positioning rod (17) and located on one side of the sleeve block (16).

7. The sealing structure of a valve cock according to claim 6, characterized in that: The plurality of support blocks (15) are arranged in a circular ring with equal spacing, and the vertical cross-sections of the plurality of support blocks (15) are all arranged in a semicircular shape.

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