Valve rod sealing structure of pipeline valve

Abstract

The utility model discloses a pipeline valve rod sealing structure which comprises a valve body, the left end and the right end of the valve body are both fixedly connected with connecting pipes, the ends, away from each other, of the two connecting pipes are both fixedly connected with connecting flanges, a sealing bearing is arranged on the upper surface of the valve body, a valve cylinder is arranged in the sealing bearing, and a valve rod is arranged in the valve cylinder. A valve element is arranged at the bottom end of the valve cylinder, a valve rod body is arranged at the top end of the valve cylinder, a sealing ring is fixedly connected to the upper surface of a sealing bearing, the inner ring of the sealing ring is fixedly connected with the outer surface of the valve cylinder, a positioning ring is fixedly connected to the outer surface of the valve cylinder, and a positioning seat is fixedly connected to the upper surface of the positioning ring. Connection of the valve cylinder and the valve rod body can be reinforced through matching of the positioning seat and the fixing plate, the connecting position of the valve cylinder and the valve rod body can be sealed through matching of the positioning ring, the first sealing ring and the second sealing ring, and the fluid conveying effect of a pipeline is improved.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a pipeline valve stem sealing structure. Background Art

[0002] A valve is a device used to control media such as gas, liquid, and gas or liquid containing solid powder in various pipelines and equipment. A valve is usually composed of a valve body, a valve cover, a valve seat, an opening and closing member, a driving mechanism, a seal, and fasteners. The control function of the valve is achieved by relying on the driving mechanism or fluid to drive the opening and closing member to rise and fall, slide, swing, or change the size of the flow channel area by the rotation ratio. Valves are also divided into cast iron valves, cast steel valves, stainless steel valves, chrome-molybdenum steel valves, chrome-molybdenum-vanadium steel valves, duplex steel valves, plastic valves, non-standard customized valve materials, etc. According to the driving method, there are manual valves, electric valves, pneumatic valves, hydraulic valves, etc., and according to the pressure, they can be divided into vacuum valves.

[0003] The valve stem is an important component of the valve, used for transmission. It is connected to the actuator or handle on the top and directly drives the valve core to move or rotate below to realize the valve opening or closing or regulation. At present, the sealing of the connection of the valve stem is relatively simple. After long-term use, it is easy to cause valve leakage, affecting the effect of pipeline fluid transportation. Therefore, in order to solve the above problems, we provide a pipeline valve stem sealing structure. Utility Model Content

[0004] The purpose of the utility model is to provide a pipeline valve stem sealing structure to solve the problems raised in the above background technology.

[0005] The embodiments of this application adopt the following technical solutions:

[0006] When unclamping said control button, under the effect of the compression spring and the bubble holding vessel internal pressure that shaves, combine closely in the interior edge of valve gap and sealing load chamber, and burble goes out control valve thereby control is shaved.

[0007] Preferably, the outer surface of the fixing bolt is provided with a thread matched with the inner wall of the threaded hole thereof, and the positioning seat is hexagonal in shape.

[0008] Preferably, the top end of the valve stem body is fixedly connected to a fixing seat, and the upper surface of the fixing seat is fixedly connected to a connecting seat.

[0009] Preferably, a handle is fixedly connected to the left side of the connecting seat, and the outer surface of the handle is provided with anti-slip grooves.

[0010] Preferably, a model plate is fixedly connected to the front of the valve body, and the model plate is triangular in shape.

[0011] Preferably, both left and right ends of the valve body are fixedly connected with fixing rings, and the inner rings of the two fixing rings are fixedly connected to the outer surfaces of the two connecting pipes respectively.

[0012] At least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects:

[0013] The valve stem sealing structure of the pipeline valve can seal the connection between the valve cylinder and the valve body through the cooperation of the sealing bearing and the sealing ring, thereby increasing the sealing performance of the valve body. The cooperation of the positioning seat and the fixing plate can reinforce the connection between the valve cylinder and the valve stem body. The cooperation of the positioning ring and the first sealing ring and the second sealing ring can seal the connection between the valve cylinder and the valve stem body, thereby avoiding leakage of the valve and improving the effect of pipeline fluid transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0015] Figure 1 : A three-dimensional structural diagram of a front view of a valve stem sealing structure of a pipeline valve of the utility model;

[0016] Figure 2 : A three-dimensional structural diagram of a side view of a valve stem sealing structure of a pipeline valve of the utility model;

[0017] Figure 3 : A sectional view of the front view of the valve body in the valve stem sealing structure of the pipeline valve of the utility model;

[0018] Figure 4 For: The utility model pipeline valve stem sealing structure Figure 3 A magnified schematic diagram of the structure in the middle.

[0019] In the figure: 1. Valve body; 2. Valve core; 3. Connecting pipe; 4. Connecting flange; 5. Sealing bearing; 6. Valve cylinder; 7. Sealing ring; 8. Positioning seat; 9. Positioning ring; 10. First sealing ring; 11. Valve stem body; 12. Threaded hole; 13. Fixing plate; 14. Fixing bolt; 15. Through hole; 16. Second sealing ring; 17. Fixing seat; 18. Connecting seat; 19. Handle; 20. Model plate; 21. Fixing ring. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0021] The following describes in detail the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0022] See also Figure 1-4 , the utility model provides a pipeline valve stem sealing structure technical solution:

[0023] A pipeline valve stem sealing structure includes a valve body 1, the left and right ends of the valve body 1 are fixedly connected with connecting pipes 3, the ends of the two connecting pipes 3 away from each other are fixedly connected with connecting flanges 4, the upper surface of the valve body 1 is provided with a sealing bearing 5, the interior of the sealing bearing 5 is provided with a valve cylinder 6, the bottom end of the valve cylinder 6 is provided with a valve core 2, the top of the valve cylinder 6 is provided with a valve stem body 11, the upper surface of the sealing bearing 5 is fixedly connected with a sealing ring 7, the inner ring of the sealing ring 7 is fixedly connected to the outer surface of the valve cylinder 6, the outer surface of the valve cylinder 6 is fixedly connected with a positioning ring 9, the upper surface of the positioning ring 9 is fixedly connected with a positioning seat 8, the interior of the positioning seat 8 is provided with a first sealing ring 10, the upper surface of the positioning seat 8 is provided with threaded holes 12 arranged at equal distances, and the upper surface of the positioning seat 8 is provided with a fixing plate 13 , the upper surface of the fixing plate 13 is provided with through holes 15 arranged at equal distances, the inner wall of each threaded hole 12 is threadedly connected with a fixing bolt 14, and the outer surface of the fixing plate 13 is provided with a second sealing ring 16, the bottom surface of the second sealing ring 16 is fixedly connected to the upper surface of the fixing plate 13; specifically, through the cooperation of the sealing bearing 5 and the sealing ring 7, the connection between the valve cylinder 6 and the valve body 1 can be sealed, thereby increasing the sealing performance of the valve body 1, and by utilizing the cooperation of the positioning seat 8 and the fixing plate 13, the connection between the valve cylinder 6 and the valve stem body 11 can be reinforced, and by utilizing the cooperation of the positioning ring 9 and the first sealing ring 10 and the second sealing ring 16, the connection between the valve cylinder 6 and the valve stem body 11 can be sealed, thereby avoiding leakage of the valve and improving the effect of conveying fluid through the pipeline;

[0024] In this embodiment, the outer surface of the fixing bolt 14 is provided with threads adapted to the inner wall of the threaded hole 12 thereof, and the positioning seat 8 is hexagonal in shape;

[0025] The top end of the valve stem body 11 is fixedly connected to a fixing seat 17 , and the upper surface of the fixing seat 17 is fixedly connected to a connecting seat 18 ;

[0026] A handle 19 is fixedly connected to the left side of the connecting seat 18, and the outer surface of the handle 19 is provided with anti-slip grooves. Specifically, the cooperation between the fixing seat 17, the connecting seat 18 and the handle 19 facilitates the staff to control the valve stem body 11, and the cooperation between the fixing bolt 14 and the threaded hole 12 can reinforce the positioning seat 8 and the fixing plate 13.

[0027] In this embodiment, a model plate 20 is fixedly connected to the front of the valve body 1, and the model plate 20 is triangular in shape;

[0028] The left and right ends of the valve body 1 are fixedly connected with fixing rings 21, and the inner rings of the two fixing rings 21 are fixedly connected to the outer surfaces of the two connecting pipes 3 respectively; specifically, the model plate 20 is used to facilitate staff to observe the model of the valve, and the fixing rings 21 are used to reinforce the connecting pipes 3, thereby improving the stability of the connecting pipes 3.

[0029] Working principle: When the pipeline valve stem sealing structure is used, the user first connects the valve to the corresponding pipeline through the cooperation of the connecting pipe 3 and the connecting flange 4, and then seals the connection between the valve cylinder 6 and the valve body 1 through the cooperation of the sealing bearing 5 and the sealing ring 7, thereby increasing the sealing performance of the valve body 1. Then, the connection between the valve cylinder 6 and the valve stem body 11 can be reinforced by the cooperation of the positioning seat 8 and the fixing plate 13. At the same time, the connection between the valve cylinder 6 and the valve stem body 11 can be sealed by the cooperation of the positioning ring 9 and the first sealing ring 10 and the second sealing ring 16, thereby avoiding leakage of the valve and improving the effect of conveying fluid through the pipeline.

[0030] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0031] The above description is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of the claims of the present application. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A pipeline valve stem sealing structure, comprising a valve body (1), characterized in that: The left and right ends of the valve body (1) are fixedly connected to connecting pipes (3), and the ends of the two connecting pipes (3) that are away from each other are fixedly connected to connecting flanges (4). The upper surface of the valve body (1) is provided with a sealing bearing (5), and the interior of the sealing bearing (5) is provided with a valve cylinder (6). The bottom end of the valve cylinder (6) is provided with a valve core (2), and the top end of the valve cylinder (6) is provided with a valve stem body (11). The upper surface of the sealing bearing (5) is fixedly connected to a sealing ring (7), and the inner ring of the sealing ring (7) is fixedly connected to the outer surface of the valve cylinder (6). The outer surface of the valve cylinder (6) is fixedly connected to a positioning ring (9). The upper surface of the positioning ring (9) is fixedly connected to a positioning seat (8), a first sealing ring (10) is provided inside the positioning seat (8), the upper surface of the positioning seat (8) is provided with threaded holes (12) arranged at equal distances, the upper surface of the positioning seat (8) is provided with a fixing plate (13), the upper surface of the fixing plate (13) is provided with through holes (15) arranged at equal distances, the inner wall of each threaded hole (12) is threadedly connected to a fixing bolt (14), the outer surface of the fixing plate (13) is provided with a second sealing ring (16), and the bottom surface of the second sealing ring (16) is fixedly connected to the upper surface of the fixing plate (13).

2. A pipeline valve stem sealing structure according to claim 1, characterized in that: The outer surface of the fixing bolt (14) is provided with a thread that matches the inner wall of the threaded hole (12), and the positioning seat (8) is hexagonal in shape.

3. The pipeline valve stem sealing structure according to claim 1, characterized in that: The top end of the valve stem body (11) is fixedly connected to a fixing seat (17), and the upper surface of the fixing seat (17) is fixedly connected to a connecting seat (18).

4. The pipeline valve stem sealing structure according to claim 2, characterized in that: A handle (19) is fixedly connected to the left side of the connecting seat (18), and an outer surface of the handle (19) is provided with anti-slip grooves.

5. The pipeline valve stem sealing structure according to claim 1, characterized in that: A model plate (20) is fixedly connected to the front of the valve body (1), and the model plate (20) is triangular in shape.

6. The pipeline valve stem sealing structure according to claim 1, characterized in that: The left and right ends of the valve body (1) are both fixedly connected with fixing rings (21), and the inner rings of the two fixing rings (21) are fixedly connected to the outer surfaces of the two connecting pipes (3) respectively.

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