A high pressure bypass valve sealing device

Abstract

The present application relates to a kind of high pressure bypass valve sealing devices, to solve the problem of valve sealing performance degradation in long-term high temperature and high pressure working environment.The device includes connecting end and sealing end, connecting end is composed of connecting shell, adjusting shell and limiting ball, and sealing end is composed of sealing shell and clamping groove.By moving the adjusting shell, the limiting ball is extruded above the protrusion, the connection between the sealing shell and the connecting shell is realized, and the oxidation "bite dead" phenomenon is avoided.The internal conical sealing element and the sealing ring enhance the sealing effect, the bolt structure connects the sealing element, the adjusting outer ring limits the adjusting shell movement range, provides flexible adjustment mechanism, adapts to different working conditions, and ensures long-term stable operation of the valve.

Description

TECHNICAL FIELD

[0001] The utility model provides a sealing device belongs to high pressure bypass valve technical field, especially relates to a high pressure bypass valve sealing device. BACKGROUND

[0002] High pressure bypass valve is the core equipment in large power plant steam turbine main steam pipeline system, and its main function includes guaranteeing the smooth start and stop of steam turbine generator unit, grid-connected power generation and load shedding. The valve is mainly used for adjusting steam flow, controlling pressure and temperature to adapt to the needs of the unit in different operating conditions.

[0003] At present, the sealing structure of many high pressure bypass valves adopts the mode that the valve seat and the valve body are fixed by screwing. Under long-term high temperature working conditions, this structure may cause "stuck" phenomenon due to oxidation, so that the threaded disassembly becomes difficult, the valve seat cannot be replaced, and then the sealing performance is affected. This design may cause internal leakage, jamming and other problems in actual application, affecting the long-term stable operation of the equipment. UTILITY MODEL CONTENTS

[0004] In order to make up for the deficiency of the prior art, the application provides a high pressure bypass valve sealing device to solve the problem that the existing sealing structure connection easily causes equipment jamming.

[0005] In order to solve the above technical problems, the utility model provides the following technical scheme: a high pressure bypass valve sealing device, comprising a connecting end, a sealing end located on one side of the connecting end and corresponding to itself, the connecting end comprising a connecting shell, an adjusting shell and a limiting ball, the sealing end comprising a sealing shell and a clamping groove on the sealing shell;

[0006] The limiting ball is embedded in the connecting shell, and the adjusting shell is fixedly connected with a protrusion corresponding to the limiting ball on the inner side; the clamping groove corresponds to the limiting ball.

[0007] Preferably, an extension plate is fixedly connected to one end of the connecting shell near the limiting ball, the extension plate is sleeved outside the sealing shell, and an adjusting groove corresponding to the limiting ball and penetrating through the extension plate is arranged on the extension plate.

[0008] Preferably, the clamping groove corresponds to the adjusting groove, an arc surface corresponding to the limiting ball is arranged on the protrusion, a blocking piece is fixedly connected to the outer side of the opening of one end of the connecting shell near the protrusion, and the adjusting shell is close to the blocking piece.

[0009] Preferably, a reset spring is fixedly connected to one side of the protrusion away from the arc surface, and the other end of the reset spring is fixedly connected with the blocking piece.

[0010] Preferably, a tapered sealing element corresponding to itself is arranged in the interior of the connecting shell and the sealing shell, a sealing ring is sleeved outside the sealing element, and the smaller opening ends of the sealing elements are close to each other.

[0011] Preferably: the sealing member is connected by bolt structure at one end close to each other, and the outer end of the sealing shell away from the clamping groove is connected with the adjusting outer ring corresponding to the adjusting shell through threads, and the movement of the adjusting outer ring limits the activity range of the adjusting shell.

[0012] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0013] The utility model discloses a corresponding connecting end and sealing end are set up to realize the sealing effect of valve body. Specifically, when the sealing shell is inserted into the connecting shell, the protrusion no longer exerts pressure on the limiting ball by moving the adjusting shell. With the further deepening of the sealing shell, the limiting ball is pressed to both sides and finally placed above the protrusion. When the clamping groove on the sealing shell contacts the limiting ball, the adjusting shell is reset, so that the limiting ball is located in the clamping groove, and the adjusting shell prevents the limiting ball from moving outward, thereby realizing the connection of the sealing shell and the connecting shell. The structure design effectively avoids the oxidation "bite dead" phenomenon caused by long-term high-temperature working environment, and ensures the sealing performance and long-term stable operation of the valve body.

[0014] Other advantages, objects and features of the utility model will be set forth in the subsequent description, and to some extent, it will be obvious to those skilled in the art based on the study of the following, or can be taught from the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective view of the utility model discloses a kind of high-pressure bypass valve sealing device;

[0016] Figure 2 It is an explosion diagram of the utility model discloses a kind of high-pressure bypass valve sealing device;

[0017] Figure 3 It is a sectional view of the utility model discloses a kind of high-pressure bypass valve sealing device;

[0018] Figure 4 It is the explosion diagram of the connecting end and sealing end of the utility model discloses a kind of high-pressure bypass valve sealing device.

[0019] As shown in the figure:

[0020] 1, connecting end;

[0021] 11, connecting shell;12, adjusting shell;13, limiting ball;14, protrusion;15, adjusting groove;16, camber;17, blocking piece;

[0022] 111, extension plate;

[0023] 2, sealing end;

[0024] 21, sealing shell; 22, clamping groove; 23, reset spring; 24, sealing element; 25, sealing ring; 26, adjusting outer ring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0026] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] As shown in Figure 1 and Figure 2 A high-pressure bypass valve sealing device, comprising a connecting end 1 and a sealing end 2 located on one side of the connecting end 1 and corresponding thereto. The connecting end 1 is composed of a connecting shell 11, an adjusting outer shell 12 and a limiting ball 13; the sealing end 2 is composed of a sealing shell 21 and a clamping groove 22 located on the sealing shell 21. The limiting ball 13 is located above the connecting shell 11, and the adjusting outer shell 12 has a protrusion 14 fixed on the inner side corresponding to the limiting ball 13. The end of the connecting shell 11 close to the limiting ball 13 is fixedly connected with an extension plate 111, and the extension plate is provided with an adjusting groove 15 corresponding to the limiting ball 13 and penetrating through itself. The clamping groove 22 corresponds to the adjusting groove 15, the protrusion 14 is provided with an arc surface 16 corresponding to the limiting ball 13, and the end of the connecting shell 11 close to the protrusion 14 is fixedly connected with a blocking piece 17 on the outer side of the opening, and the adjusting outer shell 12 is in close contact with the blocking piece 17. The protrusion 14 is fixedly connected with a reset spring 23 on the side away from the arc surface 16, and the other end of the reset spring 23 is fixedly connected with the blocking piece 17.

[0029] In this embodiment, the sealing effect on the valve body is achieved by setting the corresponding connection end 1 and sealing end 2. Specifically, when the sealing shell 21 is inserted into the connection shell 11, the adjusting shell 12 is moved so that the protrusion 14 no longer exerts pressure on the limiting ball 13. With the further deepening of the sealing shell 21, the limiting ball 13 is squeezed to both sides and finally placed above the protrusion 14. When the clamping groove 22 on the sealing shell 21 contacts the limiting ball 13, the adjusting shell 12 is reset so that the limiting ball 13 is located in the clamping groove 22, and the adjusting shell 12 prevents the limiting ball 13 from moving outward, thereby achieving the connection of the sealing shell 21 and the connection shell 11. This structural design effectively avoids the oxidation "bite" phenomenon caused by long-term high temperature and high pressure working environment, ensuring the sealing performance and long-term stable operation of the valve body.

[0030] As shown in Figure 3 and Figure 4 , the high-pressure bypass valve sealing device further includes corresponding tapered sealing elements 24 inside the connection shell 11 and the sealing shell 21. These sealing elements 24 are externally sleeved with sealing rings 25, and the smaller end of the sealing element 24 is close to each other, connected by a bolt structure. The end of the sealing shell 21 away from the clamping groove 22 is externally connected by a thread with the corresponding adjusting outer ring 26 of the adjusting shell 12, and the movement of the adjusting outer ring 26 limits the movement range of the adjusting shell 12. This structural design ensures the sealing performance of the high-pressure bypass valve in a long-term high-temperature working environment, effectively avoids the "bite" phenomenon caused by oxidation, and ensures the long-term stable operation of the valve.

[0031] In this embodiment, the design of the bolt structure allows for replacement or removal according to specific use, which is not limited. By rotating the adjusting outer ring 26, the up and down movement of the adjusting outer ring 26 can be achieved, so that the adjusting outer ring 26 can press down the adjusting shell 12 to adjust the position of the protrusion 14. At the same time, the adjusting outer ring 26 can also limit the maximum movement distance of the adjusting shell 12 under the action of the reset spring 23, achieving better limiting effect on the limiting ball 13. This design provides a flexible adjustment mechanism to adapt to different working pressures and environmental conditions, further enhancing the reliability and adaptability of the sealing device.

[0032] In use, first, the connection of the sealing shell 21 and the connecting shell 11 is completed, and the sealing effect of the valve body is ensured. During the connection process, the mutually corresponding conical seals 24 inside the connecting shell 11 and the sealing shell 21 play a sealing role, the seals 24 are externally sleeved with sealing rings 25, and the smaller opening end of the seals 24 is connected by a bolt structure. In addition, the outer end of the sealing shell 21 away from the clamping groove 22 is externally connected with an adjusting outer ring 26 through a threaded connection, the movement of the adjusting outer ring 26 limits the movement range of the adjusting shell 12, ensures the sealing performance of the high-pressure bypass valve in a long-term high-temperature working environment, and the movable limiting ball 13 effectively avoids the "stuck" phenomenon caused by oxidation, thereby ensuring the long-term stable operation of the valve. In actual use, the design of the bolt structure allows the user to decide whether to replace or remove it according to the specific use, and by rotating the adjusting outer ring 26, the up-and-down movement of the adjusting outer ring 26 can be realized, so that the adjusting outer ring 26 can press down the adjusting shell 12 to adjust the position of the protrusion 14. At the same time, the adjusting outer ring 26 can also limit the maximum movement distance of the adjusting shell 12 under the action of the return spring 23, realize better limiting effect of the limiting ball 13, and provide a flexible adjustment mechanism to adapt to different working pressures and environmental conditions, thereby further enhancing the reliability and adaptability of the sealing device.

[0033] Although the utility model has disclosed as above with preferable embodiments, it is not used to limit the utility model, anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model should be limited by the claims.

Claims

1. A high pressure bypass valve sealing device, comprising a connecting end (1) and a sealing end (2) located on one side of the connecting end (1) and corresponding to itself, characterized in that: The connecting end (1) comprises a connecting shell (11), an adjusting shell (12) and a limiting ball (13), and the sealing end (2) comprises a sealing shell (21) and a clamping groove (22) on the sealing shell (21). The limiting ball (13) is arranged above the connecting shell (11), and the adjusting shell (12) is fixedly connected with a protrusion (14) corresponding to the limiting ball (13) on the inner side.

2. A high pressure bypass valve sealing device according to claim 1, characterized in that: The connecting shell (11) is fixedly connected with an extension plate (111) sleeved outside the sealing shell (21) on one end close to the limiting ball (13), and the extension plate (111) is provided with an adjusting groove (15) corresponding to the limiting ball (13) and penetrating through the extension plate (111).

3. A high pressure bypass valve sealing device according to claim 2, characterized in that: The clamping groove (22) corresponds to the adjusting groove (15), the protrusion (14) is provided with an arc surface (16) corresponding to the limiting ball (13), the connecting shell (11) is fixedly connected with a blocking piece (17) on the opening side of one end close to the protrusion (14), and the adjusting shell (12) is close to the blocking piece (17).

4. A high pressure bypass valve sealing device according to claim 3, characterized in that: The protrusion (14) is fixedly connected with a return spring (23) on the side away from the arc surface (16), and the other end of the return spring (23) is fixedly connected with the blocking piece (17).

5. A high pressure bypass valve sealing device according to claim 1, characterized in that: The connecting shell (11) and the sealing shell (21) are both provided with a tapered sealing element (24) corresponding to the connecting shell (11) and the sealing shell (21), respectively, the sealing element (24) is sleeved with a sealing ring (25) outside, and the opening ends of the sealing element (24) are close to each other.

6. A high pressure bypass valve sealing device according to claim 5, characterized in that: The opening ends of the sealing element (24) are connected through a bolt structure, the sealing shell (21) is externally threadedly connected with an adjusting outer ring (26) corresponding to the adjusting shell (12) on the end away from the clamping groove (22), and the movement of the adjusting outer ring (26) limits the movement range of the adjusting shell (12).

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