Ball valve structure with double compensation effect on abrasion of sealing element

Abstract

The ball valve structure comprises a shell, a spherical valve and guide sleeves II, the spherical valve is installed from the upper end of the shell, the guide sleeves II are installed in channels in the left end and the right end of the shell respectively, the inner ends of the guide sleeves II are attached to the spherical valve, and the inner ends of the guide sleeves II are attached to the spherical valve. A polytetrafluoroethylene sealing ring, an inlet valve and a wave spring are sequentially installed in the guide sleeve, an inner boss is arranged at the inner side end of the guide sleeve, the polytetrafluoroethylene sealing ring abuts against the inner boss and makes contact with the spherical valve, a guide sleeve I is arranged at the upper end of the shell, a sealing ring I is arranged between the guide sleeve I and the shell, and a flange is arranged at the left end of the shell. The inner end of the flange is inserted into the guide sleeve II, a pipe joint is arranged at the right end of the shell, the inner end of the pipe joint is inserted into the guide sleeve II, and the inner end of the flange and the inner end of the pipe joint make contact with the wave spring. The structure is simple in design, high in compensation capacity, capable of meeting the requirement for frequent reversing actions and capable of keeping reliable sealing for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic valve compensating seals, in particular to a ball valve structure with double compensation effects on seal wear. Background Art

[0002] The commonly used manual three-way ball valves on the market mainly use packing compression seals or spring compensation seals for sealing; the packing seal has limited compensation capacity and a high risk of leakage; the spring compensation seal, due to the long-term compression deformation or wear of the seal, the spring force will decrease, and the sealing will gradually deteriorate with the increase of service life; it cannot meet the requirements of long-term reliable sealing. Therefore, a ball valve structure with strong compensation capacity and long-term reliable sealing is needed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a ball valve structure with double compensation effect on the wear of the seal. The structure is simple in design and has strong compensation ability, meets the frequent needs of switching actions, and can maintain reliable sealing for a long time, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a ball valve structure with double compensation for seal wear, comprising a shell, a spherical valve and a guide sleeve II, the spherical valve is installed from the upper end of the shell, the guide sleeve II is respectively installed in the channels at the left and right ends of the shell, and the inner end of the guide sleeve II is in contact with the spherical valve, a polytetrafluoroethylene sealing ring, an inlet valve and a wave spring are sequentially installed in the guide sleeve II, an inner side end of the guide sleeve II is provided with an inner boss, the polytetrafluoroethylene sealing ring abuts on the inner boss, and the polytetrafluoroethylene sealing ring contacts the spherical valve, a guide sleeve I is provided at the upper end of the shell, a sealing ring I is provided between the guide sleeve I and the shell, a flange is provided at the left end of the shell, the inner end of the flange is inserted into the guide sleeve II, a pipe joint is provided at the right end of the shell, the inner end of the pipe joint is inserted into the guide sleeve II, and the inner end of the flange and the inner end of the pipe joint are respectively in contact with the wave spring.

[0005] Furthermore, the left end of the shell is set as port A, the right end of the shell is set as port B, and the lower end of the shell is set as the inlet.

[0006] Furthermore, the upper end of the spherical valve passes through the top of the guide sleeve I, a sealing ring VII is arranged between the spherical valve and the guide sleeve I, a sealing ring IV is arranged between the lower part of the spherical valve and the shell, and the upper end of the spherical valve is connected to a handle by a screw.

[0007] Furthermore, a sealing ring V is arranged between the flange and the shell, a sealing ring III is arranged between the flange and the guide sleeve II and between the pipe joint and the guide sleeve II respectively, and a sealing ring II is arranged on the outer surface of the left end of the flange.

[0008] Furthermore, a sealing ring II is provided between the pipe joint and the shell, and the pipe joint and the shell are connected by threads.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. The structure is simple in design. The wave spring is compressed to press the inlet valve and the PTFE sealing ring onto the spherical valve to form a sealing structure. The structure has strong compensation ability and can maintain reliable sealing for a long time.

[0011] 2. Guide sleeve II is also tightly attached to the spherical surface due to the pressure transmitted to it by the PTFE sealing ring. The greater the pressure on the PTFE sealing ring, the tighter the guide sleeve fits to the spherical surface, protecting the sealing ring from high pressure without causing gap extrusion. Under pressure, the inlet valve will be subjected to the dual effects of spring force and partial hydraulic pressure, and the sealing performance is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the handle rotating to switch the outlet of the utility model;

[0014] Figure 3 It is a schematic diagram of the enlarged structure of the guide sleeve II and the inlet valve of the utility model.

[0015] In the figure: 1 handle, 2 screw, 3 guide sleeve I, 4 sealing ring I, 5 housing, 6 sealing ring II, 7 pipe joint, 8 sealing ring III, 9 wave spring, 10 guide sleeve II, 11 inlet valve, 12 polytetrafluoroethylene sealing ring, 13 sealing ring IV, 14 ball valve, 15 sealing ring V, 16 sealing ring VI, 17 flange, 18 sealing ring VII, 19 A port, 20 B port, 21 inner boss. DETAILED DESCRIPTION

[0016] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0017] See also Figure 1-3The utility model provides a technical solution: a ball valve structure with double compensation for seal wear, including a housing 5, a spherical valve 14 and a guide sleeve II 10. The spherical valve 14 is installed from the upper end of the housing 5, and the guide sleeve II 10 is respectively installed in the channels at the left and right ends of the housing 5, and the inner end of the guide sleeve II 10 is fitted with the spherical valve 14. The guide sleeve II 10 is sequentially installed with a polyfluorocarbon sealing ring 12, an inlet valve 11, and a wave spring 9. At this time, the wave spring 9 is compressed, so that the polyfluorocarbon sealing ring 12 is tightly fitted with the spherical valve 14, and the guide sleeve II 10 is also forced to fit tightly with the spherical valve 14, thereby forming a reliable sealing structure. The inner side end of the guide sleeve II 10 is provided with an inner boss 21, and the polyfluorocarbon sealing ring 12 is abutted against the inlet valve 11. On the inner boss 21, the polytetrafluoroethylene sealing ring 12 contacts the spherical valve 14, and the polytetrafluoroethylene sealing ring 12 is tightly attached to the spherical surface of the spherical valve 14 to achieve sealing. A guide sleeve Ⅰ3 is provided at the upper end of the shell 5, and a sealing ring Ⅰ4 is provided between the guide sleeve Ⅰ3 and the shell 5. A flange 17 is provided at the left end of the shell 5, and the inner end of the flange 17 is inserted into the guide sleeve Ⅱ10. A pipe joint 7 is provided at the right end of the shell 5, and the inner end of the pipe joint 7 is inserted into the guide sleeve Ⅱ10. The inner ends of the flange 17 and the pipe joint 7 are respectively in contact with the wave spring 9, and the flange 17 and the pipe joint 7 compress the wave spring 9 respectively. The wave spring 9 is compressed to press the inlet valve 11 and the polytetrafluoroethylene sealing ring 12 onto the spherical valve 14 to form a sealing structure.

[0018] The left end of the shell 5 is set as the A port 19, the right end of the shell 5 is set as the B port 20, and the lower end of the shell 5 is set as the inlet.

[0019] The upper end of the spherical valve 14 passes through the top of the guide sleeve Ⅰ3, a sealing ring Ⅶ18 is arranged between the spherical valve 14 and the guide sleeve Ⅰ3, a sealing ring IV13 is arranged between the lower part of the spherical valve 14 and the housing 5, and the upper end of the spherical valve 14 is connected to the handle 1 through the screw 2. The spherical valve 14 is rotated by the handle 1 to realize the switching of the A port 19 and the B port 20.

[0020] A sealing ring V15 is arranged between the flange 17 and the shell 5, a sealing ring III8 is arranged between the flange 17 and the guide sleeve II10 and between the pipe joint 7 and the guide sleeve II10 respectively, a sealing ring II6 is arranged on the outer surface of the left end of the flange 17 for sealing when connected to the pipeline, a sealing ring II6 is arranged between the pipe joint 7 and the shell 5, and the pipe joint 7 and the shell 5 are connected by threads. In this structure, the sealing ring material is polytetrafluoroethylene SFB-1 to meet the sealing requirements.

[0021] When in use: under no pressure, the wave spring 9 provides pressure for the inlet valve 11, thereby compressing the polytetrafluoroethylene sealing ring 12, so that the polytetrafluoroethylene sealing ring 12 is tightly attached to the spherical surface of the spherical valve 14 to achieve sealing; the guide sleeve Ⅱ10 is also tightly attached to the spherical surface due to the pressure transmitted to it by the polytetrafluoroethylene sealing ring 12. The greater the pressure on the polytetrafluoroethylene sealing ring 12, the tighter the fit between the guide sleeve Ⅱ10 and the spherical surface, protecting the guide sleeve Ⅱ10 from high pressure without causing gap extrusion. Under pressure, the inlet valve 11 of the utility model will be subjected to the dual effects of spring force and partial hydraulic pressure, and the sealing performance is better.

[0022] The basic principles, main features and advantages of the present invention are shown and described above. Without departing from the spirit and scope of the present invention, the present invention may also be subject to various changes and improvements, which are all within the scope of the present invention to be protected.

Claims

1. A ball valve structure with double compensation for seal wear, comprising a housing (5), a spherical valve (14) and a guide sleeve II (10), characterized in that: The spherical valve (14) is installed from the upper end of the housing (5), and the guide sleeve II (10) is respectively installed in the channels at the left and right ends of the housing (5), and the inner end of the guide sleeve II (10) is in contact with the spherical valve (14). The guide sleeve II (10) is sequentially installed with a polytetrafluoroethylene sealing ring (12), an inlet valve (11), and a wave spring (9). The inner side end of the guide sleeve II (10) is provided with an inner boss (21), the polytetrafluoroethylene sealing ring (12) abuts against the inner boss (21), and the polytetrafluoroethylene sealing ring (12) and the spherical valve (14) are in contact with each other. The housing (5) is provided with a guide sleeve I (3) at the upper end thereof, a sealing ring I (4) is provided between the guide sleeve I (3) and the housing (5), a flange (17) is provided at the left end thereof, the inner end of the flange (17) is inserted into the guide sleeve II (10), a pipe joint (7) is provided at the right end thereof, the inner end of the pipe joint (7) is inserted into the guide sleeve II (10), and the inner ends of the flange (17) and the pipe joint (7) are respectively in contact with the wave spring (9).

2. A ball valve structure with double compensation for seal wear according to claim 1, characterized in that: The left end of the shell (5) is set as the A port (19), the right end of the shell (5) is set as the B port (20), and the lower end of the shell (5) is set as the inlet.

3. A ball valve structure with double compensation for seal wear according to claim 1, characterized in that: The upper end of the spherical valve (14) passes through the upper part of the guide sleeve I (3), a sealing ring VII (18) is arranged between the spherical valve (14) and the guide sleeve I (3), a sealing ring IV (13) is arranged between the lower part of the spherical valve (14) and the housing (5), and the upper end of the spherical valve (14) is connected to a handle (1) through a screw (2).

4. A ball valve structure with double compensation for seal wear according to claim 1, characterized in that: A sealing ring V (15) is provided between the flange (17) and the housing (5), a sealing ring III (8) is provided between the flange (17) and the guide sleeve II (10) and between the pipe joint (7) and the guide sleeve II (10), respectively, and a sealing ring II (6) is provided on the outer surface of the left end of the flange (17).

5. A ball valve structure with double compensation for seal wear according to claim 1, characterized in that: A sealing ring II (6) is provided between the pipe joint (7) and the housing (5), and the pipe joint (7) and the housing (5) are connected by means of threads.

Images