Welding breaking valve with high sealing performance

Abstract

The welding breaking valve comprises a welding flange, a first breaking valve shell and a valve clack, a teflon seal is attached to the inner side of the first breaking valve shell, an O-shaped spring is arranged on the inner side of the teflon seal, a welding opening is formed in the surface of the welding flange, a teflon ring is fixedly connected to the surface of the valve clack, and the teflon ring is fixedly connected to the inner side of the first breaking valve shell. A polytetrafluoroethylene pad is attached to the surface of the welding flange, and a first breaking valve shell is attached to the surface of the polytetrafluoroethylene pad. According to the welding shut-off valve with the high sealing performance, polytetrafluoroethylene is installed at the joint of the first shut-off valve shell and the second shut-off valve shell, a pipeline is connected with a welding flange in a welding mode, and a polytetrafluoroethylene pad is installed at the joint of the welding flange and the first shut-off valve body; and the polytetrafluoroethylene ring is fixedly connected to the surface of the valve clack on the inner side of the breaking valve, so that the breaking valve has better sealing performance when being broken, and the sealing performance of the device is improved to a greater extent as a plurality of sealing structures are mounted at the joints of the device.

Description

Technical Field

[0001] The utility model belongs to the technical field of cut-off valves, and in particular relates to a welded cut-off valve with strong sealing performance. Background Art

[0002] A welded shutoff valve is a safety device primarily used to prevent accidental pipeline ruptures. Also known as a breakaway valve, it is installed on pipelines. Its primary function is to automatically disconnect in the event of a pipeline rupture or leak, preventing further flow and potentially dangerous accidents. This valve typically features a quick-close function and can respond quickly in the event of a malfunction, ensuring pipeline safety. It is widely used in the transportation of media such as liquefied petroleum gas and liquid ammonia, playing a crucial role in safety protection.

[0003] The current cut-off valves on the market have the following problems in actual use:

[0004] 1. When installing and using a traditional cut-off valve, the device needs to have strong sealing properties to prevent gas or liquid leakage. The device is generally connected by threads, and its sealing properties may be reduced after long-term use. The sealing properties of the device are poor.

[0005] 2. After the traditional shut-off valve is installed, if there is a liquid or gas leak in the pipeline, it is necessary to disconnect the shut-off valve in time to prevent the liquid or gas from leaking. The operation of disconnecting the traditional shut-off valve is relatively complicated and time-consuming, which makes the operation of the device more difficult to a large extent. Utility Model Content

[0006] The utility model aims to provide a welding shut-off valve with strong sealing performance to solve the technical problems raised in the background technology.

[0007] To achieve the above-mentioned purpose, the specific technical solution of the present invention is as follows: a welded shut-off valve with strong sealing performance, comprising a welding flange, a first shut-off valve housing and a valve disc. Preferably, the inner side of the first shut-off valve housing is fitted with a PTFE seal, an O-type spring is provided on the inner side of the PTFE seal, a welding port is provided on the surface of the welding flange, a PTFE ring is fixedly connected to the surface of the valve disc, the surface of the welding flange is fitted with a PTFE pad, and the surface of the PTFE pad is fitted with the first shut-off valve housing.

[0008] Preferably, the surface of the first cut-off valve housing is connected to the cut-off bolt through a thread, and the cut-off bolt is connected to the second cut-off valve housing through a thread. A first temporary groove is opened on the surface of the first cut-off valve housing, and a safety bolt is installed inside the first temporary groove. A second temporary groove is opened on the surface of the second cut-off valve housing, and a safety bolt is installed inside the second temporary groove.

[0009] Preferably, the inner side of the valve disc is fixedly connected to the first spring, the other end of the first spring is fixedly connected to the retaining ring, the inner side of the retaining ring is connected to the connecting rod via a thread, and the surface of the retaining ring is connected to the first shut-off valve housing via a thread.

[0010] Preferably, a retaining ring is bonded to the surface of the retaining ring, and a retaining spring is attached to the surface of the welding flange.

[0011] Preferably, a slot is provided on the surface of the valve disc, and a push rod is inserted into the inner side of the slot.

[0012] Preferably, the surface of the welding flange is connected to the fixing bolt via threads, and the surface of the fixing bolt is connected to the first shut-off valve housing via threads.

[0013] The utility model has the following advantages:

[0014] 1. This is a welded shut-off valve with a strong sealing performance. The first shut-off valve housing is fitted with a PTFE seal, an O-type spring is provided inside the PTFE seal, a welding port is provided on the surface of the welding flange, a PTFE ring is fixedly connected to the surface of the valve disc, a PTFE pad is fitted on the surface of the welding flange, and the surface of the PTFE pad is fitted to the first shut-off valve housing. In this way, the internal PTFE is installed at the connection between the first shut-off valve housing and the second shut-off valve housing, and the pipeline is connected to the welding flange by welding. A PTFE pad is installed at the connection between the welding flange and the first shut-off valve body, and a PTFE ring is fixedly connected to the surface of the valve disc on the inner side of the shut-off valve. Therefore, the shut-off valve has a good sealing performance even when it is disconnected. The device is equipped with multiple sealing structures at the connection, which greatly improves the sealing performance of the device.

[0015] 2. This welded shut-off valve has a strong sealing performance. The first shut-off valve housing is connected to the shut-off bolt through a threaded connection. The shut-off bolt is connected to the second shut-off valve housing through a threaded connection. A first temporary groove is provided on the surface of the first shut-off valve housing, and a safety bolt is installed inside the first temporary groove. A second temporary groove is provided on the surface of the second shut-off valve housing, and a safety bolt is installed inside the second temporary groove. In this way, through the provided safety bolts and shut-off bolts, when liquid and gas leaks during installation or use, it is only necessary to easily loosen the safety bolts and pull them out. Then, the first shut-off valve housing and the second shut-off valve housing can be separated by the easily broken shut-off bolts to prevent leakage, thereby making the device easier to operate to a great extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the valve disc structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the retaining spring of the present utility model;

[0020] Figure 4 This is a schematic diagram of the O-shaped spring structure of the present utility model.

[0021] Explanation of the marks in the figure: 1. Welding flange; 2. First shut-off valve housing; 3. Second shut-off valve housing; 4. Welding port; 5. Connecting rod; 6. PTFE gasket; 7. Valve disc; 8. PTFE seal; 9. Push rod; 10. Circlip; 11. Retaining ring; 12. First spring; 13. Slot; 14. O-type spring; 15. PTFE ring; 16. Fixing bolt; 17. Safety bolt; 18. First temporary groove; 19. Shut-off bolt; 20. Second temporary groove. DETAILED DESCRIPTION

[0022] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0023] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0025] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0026] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0027] In order to better understand the purpose, structure and function of the present invention, a welding shut-off valve with strong sealing performance of the present invention is further described in detail below with reference to the accompanying drawings.

[0028] like Figure 1-4 As shown, the utility model is a welded shut-off valve with strong sealing performance, including a welding flange 1, a first shut-off valve housing 2 and a valve disc 7. The inner side of the first shut-off valve housing 2 is fitted with a PTFE seal 8, and an O-type spring 14 is provided on the inner side of the PTFE seal 8. A welding port 4 is provided on the surface of the welding flange 1, and a PTFE ring 15 is fixedly connected to the surface of the valve disc 7. In this way, the PTFE ring 15 is fixedly connected to the surface of the valve disc 7 on the inner side of the shut-off valve, so that the shut-off valve has good sealing performance when it is disconnected. The surface of the welding flange 1 is fitted with a PTFE pad 6, and the surface of the PTFE pad 6 is fitted with the first shut-off valve housing 2. In this way, the internal PTFE is installed at the connection between the first shut-off valve housing 2 and the second shut-off valve housing 3, and the pipeline is connected to the welding flange 1 by welding, and the PTFE pad 6 is installed at the connection between the welding flange 1 and the first shut-off valve body. The device is equipped with multiple sealing structures at the connection, which greatly improves the sealing performance of the device.

[0029] The surface of the first shut-off valve housing 2 is connected to the shut-off bolt 19 through a thread, and the shut-off bolt 19 is connected to the second shut-off valve housing 3 through a thread. A first temporary groove 18 is provided on the surface of the first shut-off valve housing 2, and a safety bolt 17 is installed inside the first temporary groove 18. A second temporary groove 20 is provided on the surface of the second shut-off valve housing 3, and a safety bolt 17 is installed inside the second temporary groove 20. In this way, through the provided safety bolts 17 and the shut-off bolts 19, when liquid and gas leakage occurs during installation or use, it is only necessary to easily loosen the safety bolts 17 and pull it out. Then, the first shut-off valve housing 2 and the second shut-off valve housing 3 can be separated through the easily broken shut-off bolts 19 to prevent leakage, thereby making the device easier to operate to a great extent.

[0030] The inner side of the valve disc 7 is fixedly connected to the first spring 12, and the other end of the first spring 12 is fixedly connected to the retaining ring 11. The inner side of the retaining ring 11 is connected to the connecting rod 5 through a thread, and the surface of the retaining ring 11 is connected to the first shut-off valve housing 2 through a thread. In this way, through the first spring 12, when the shut-off valve breaks, the first spring 12 will automatically push the valve disc 7 so that the polytetrafluoroethylene ring 15 on its surface fits into the first shut-off valve housing 2 to prevent leakage, thereby greatly improving the practicality of the device.

[0031] The retaining ring 11 is bonded with the retaining spring 10 on its surface, and the retaining spring 10 is fitted with the welding flange 1 on its surface. Thus, the retaining ring 11 is prevented from shaking during installation by the retaining spring 10 , thereby greatly improving the stability of the device.

[0032] A slot 13 is provided on the surface of the valve disc 7, and a push rod 9 is inserted into the inner side of the slot 13. In this way, the push rod 9 prevents the valve disc 7 from moving toward the center when the shut-off valve is in normal use, thereby greatly improving the stability of the device.

[0033] The surface of the welding flange 1 is connected to the fixing bolt 16 through a thread, and the surface of the fixing bolt 16 is connected to the first shut-off valve housing 2 through a thread. In this way, the welding flange 1 and the first shut-off valve housing 2 are connected by multiple fixing bolts 16 to prevent the connection from shaking, thereby greatly improving the stability of the device.

[0034] The working principle of the welded shut-off valve with strong sealing performance is as follows: when the shut-off valve is in normal use, the pipeline is welded to the inside of the welding port 4, and the internal PTFE is installed at the connection between the first shut-off valve housing 2 and the second shut-off valve housing 3, and a PTFE pad 6 is installed at the connection between the welding flange 1 and the first shut-off valve body. A PTFE ring 15 is fixedly connected to the surface of the valve disc 7 on the inner side of the shut-off valve, so that the shut-off valve has good sealing performance even when it is disconnected. The device is installed with multiple sealing structures at the connection, which greatly improves the sealing performance of the device. When the shut-off valve needs to be disconnected due to leakage, it is only necessary to easily loosen the safety bolt 17 and pull it out. Then, the first shut-off valve housing 2 and the second shut-off valve housing 3 can be separated by the easily broken shut-off bolt 19. The first spring 12 will automatically push the valve disc 7 so that the PTFE ring 15 on its surface fits the first shut-off valve housing 2 to prevent leakage, thereby greatly improving the practicality of the device, preventing leakage, and making the device easier to operate.

[0035] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A welded shut-off valve with strong sealing performance, comprising a welded flange (1), a first shut-off valve housing (2) and a valve disc (7), characterized in that: The inner side of the first shut-off valve housing (2) is fitted with a polytetrafluoroethylene seal (8), an O-type spring (14) is provided on the inner side of the polytetrafluoroethylene seal (8), a welding port (4) is provided on the surface of the welding flange (1), a polytetrafluoroethylene ring (15) is fixedly connected to the surface of the valve flap (7), the surface of the welding flange (1) is fitted with a polytetrafluoroethylene gasket (6), and the surface of the polytetrafluoroethylene gasket (6) is fitted with the first shut-off valve housing (2).

2. The welded shut-off valve with strong sealing performance according to claim 1, characterized in that: The surface of the first cut-off valve housing (2) is connected to a cut-off bolt (19) via a thread, and the cut-off bolt (19) is connected to the second cut-off valve housing (3) via a thread. A first temporary groove (18) is provided on the surface of the first cut-off valve housing (2), and a safety bolt (17) is installed inside the first temporary groove (18). A second temporary groove (20) is provided on the surface of the second cut-off valve housing (3), and a safety bolt (17) is installed inside the second temporary groove (20).

3. The welded shut-off valve with strong sealing performance according to claim 1, characterized in that: The inner side of the valve flap (7) is fixedly connected to a first spring (12), the other end of the first spring (12) is fixedly connected to a retaining ring (11), the inner side of the retaining ring (11) is connected to a connecting rod (5) via a thread, and the surface of the retaining ring (11) is connected to a first shutoff valve housing (2) via a thread.

4. The welded shut-off valve with strong sealing performance according to claim 3, characterized in that: The retaining ring (11) is bonded to the surface of the retaining ring (10), and the surface of the retaining ring (10) is fitted to the welding flange (1).

5. The welded shut-off valve with strong sealing performance according to claim 1, characterized in that: A slot (13) is provided on the surface of the valve flap (7), and a push rod (9) is inserted into the inner side of the slot (13).

6. The welded shut-off valve with strong sealing performance according to claim 1, characterized in that: The surface of the welding flange (1) is connected to a fixing bolt (16) via a thread, and the surface of the fixing bolt (16) is connected to a first shutoff valve housing (2) via a thread.

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