Pressure regulating valve mounting structure for gas pipeline

Abstract

The utility model provides a gas pipeline pressure regulating valve installation structure which comprises connecting sections located at the two ends of a pressure regulating valve body, a pipeline is arranged on the outer side of each connecting section, a first flange plate is arranged on the outer side of a port of each connecting section in the circumferential direction, and a second flange plate is arranged on the outer side of the end, facing the corresponding connecting section, of each pipeline in the circumferential direction. Each connecting section is fixedly connected with the pipeline through a connecting piece, a first sealing groove is formed in the end, facing the corresponding connecting section, of the pipeline, a second sealing groove is formed in a port of each connecting section, and each connecting piece comprises a connecting ring, annular sealing edges arranged at the two ends of the connecting ring and a fixing ring arranged on the circumferential outer side wall of the connecting ring. The two sealing edges are inserted into the corresponding first sealing groove and the second sealing groove in a sealed mode respectively, and the fixing ring is fixedly connected with the first flange plate and the second flange plate together. The pressure regulating valve has the beneficial effects that a multi-stage sealing surface is effectively increased, the sealing performance is greatly improved, and the pressure regulating valve is more stable to install and use.

Description

Technical Field

[0001] This utility model belongs to the field of pressure regulating valve installation technology, and in particular relates to an installation structure for a pressure regulating valve for gas pipelines. Background Technology

[0002] In gas pipeline systems, gas pressure regulation is primarily achieved by installing pressure regulating valves and transmitters on the gas pipeline, with a controller controlling the opening of the pressure regulating valve. This, in turn, regulates the gas outlet pressure. Currently, pressure regulating valves are often installed by directly fixing the valve body flange to the flange at the gas pipeline port using bolts and nuts. Although sealing gaskets are installed at the flange, their sealing effect weakens over long-term use, affecting gas delivery and potentially posing safety hazards. Utility Model Content

[0003] In view of this, the present invention aims to overcome the shortcomings of the above-mentioned problems in the prior art and proposes an installation structure for a pressure regulating valve for gas pipelines.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] An installation structure for a pressure regulating valve for gas pipelines includes connecting sections at both ends of the valve body. Each connecting section has a pipe on its outer side, and each connecting section port has a first flange circumferentially arranged on its outer side. Each pipe has a second flange circumferentially arranged on its outer side at the end facing the connecting section. Each connecting section is fixedly connected to the pipe by a connector. An annular first sealing groove is formed at the end of the pipe facing the connecting section, and an annular second sealing groove is formed at the port of each connecting section. The connector includes a connecting ring, an annular sealing edge at both ends of the connecting ring, and a fixing ring on the outer circumferential wall of the connecting ring. The two sealing edges are respectively sealed and inserted into the corresponding first sealing groove and second sealing groove. The fixing ring is fixedly connected to the first flange and the second flange.

[0006] Furthermore, each sealing edge has an annular groove on both its inner and outer sides, and a sealing ring is embedded in each groove. The sealing edge is sealed between the sealing ring and the side walls of the first sealing groove and the second sealing groove.

[0007] Furthermore, the two grooves on each sealing edge are staggered.

[0008] Furthermore, there are two fixing rings, which are located at both ends of the outer circumferential wall of the connecting ring. Multiple limiting grooves are evenly provided on opposite sides of each fixing ring. A first through groove with its bottom connected to the limiting groove and its width smaller than the diameter of the limiting groove is provided on the outer circumferential wall of each fixing ring. A second through groove is provided on the outer circumferential wall of the first flange and the second flange, which is aligned with the first through groove. The first flange, the second flange and the corresponding fixing ring are fixed together by bolts and nuts. The bolt nuts are embedded in the limiting grooves, and the bolt shanks pass through the first and second through grooves. The nuts are pressed against the outer walls of the corresponding first flange and the second flange.

[0009] Furthermore, a washer groove is provided on the outer wall of the first flange and the second flange for each bolt, and a washer is provided in the washer groove to fit on the corresponding bolt. There are two nuts on each bolt, and the two nuts are pressed against each other, with the inner nut pressing against the washer.

[0010] Furthermore, a sealing gasket is provided between the first flange, the second flange, and the corresponding retaining ring, and the sealing gasket is provided with a U-shaped groove at each bolt, through which the bolt passes.

[0011] Compared with the prior art, this utility model has the following advantages:

[0012] The gas pipeline pressure regulating valve installation structure of this utility model connects the pipeline and the connecting section together through a connector. A first sealing groove and a second sealing groove are respectively provided on the end face of the pipeline and the end face of the connecting section. Sealing edges are provided on both sides of the connecting ring of the connector. The sealing edges are sealed and inserted into the first sealing groove and the second sealing groove, and are fixed together with the first flange and the second flange through a fixing ring, instead of directly fixing the first flange and the second flange together with bolts and nuts. This effectively increases the number of sealing surfaces, greatly improves the sealing performance, and makes the installation and use of the pressure regulating valve more stable. Attached Figure Description

[0013] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0014] Figure 1 This is a schematic diagram of the installation structure of the pressure regulating valve for gas pipelines according to an embodiment of the present utility model;

[0015] Figure 2 This is a schematic diagram of the connection structure of the pipe and connecting section described in an embodiment of this utility model;

[0016] Figure 3 This is an exploded view of the pipe and connecting section connection structure described in an embodiment of the present utility model;

[0017] Figure 4 This is a cross-sectional view of the pipe and connecting section connection structure described in an embodiment of this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Pressure regulating valve body; 101. Connecting section; 102. First flange; 103. Second sealing groove; 2. Pipeline; 201. Second flange; 202. First sealing groove; 3. Connecting parts; 301. Connecting ring; 302. Sealing edge; 303. Retaining ring; 304. Groove; 305. Limiting groove; 306. First through groove; 4. Bolt; 5. Nut; 6. Washer; 7. Sealing gasket; 701. U-groove; 8. Sealing ring; 9. Second through groove; 10. Washer groove. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] As shown in the figure, a pressure regulating valve installation structure for a gas pipeline includes connecting sections 101 at both ends of the valve body 1 of the pressure regulating valve. Each connecting section 101 has a pipe 2 on its outer side, and each connecting section 101 has a first flange 102 circumferentially arranged on the outer side of its port. Each pipe 2 has a second flange 201 circumferentially arranged on the outer side of its end facing the connecting section 101. Each connecting section 101 is fixedly connected to the pipe 2 by a connector 3. An annular first sealing groove 202 is opened at the end of the pipe 2 facing the connecting section 101, and an annular second sealing groove 103 is opened on the port of each connecting section 101. The connector 3 includes a connecting ring 301, an annular sealing edge 302 at both ends of the connecting ring 301, and a fixing ring 303 on the outer circumferential wall of the connecting ring 301. The two sealing edges 302 are respectively sealed and inserted into the corresponding first sealing groove 202 and second sealing groove 103. The fixing ring 303 is fixedly connected to the first flange 102 and the second flange 201. In this embodiment, the pipe 2 and the connecting section 101 are connected together by the connector 3. A first sealing groove 202 and a second sealing groove 103 are respectively provided on the end face of the pipe 2 and the end face of the connecting section 101. Sealing edges 302 are provided on both sides of the connecting ring 301 of the connector 3. The sealing edges 302 are sealed and inserted together with the first sealing groove 202 and the second sealing groove 103, and are fixed together with the first flange 102 and the second flange 201 by the fixing ring 303, instead of directly fixing the first flange 102 and the second flange 201 together with bolts and nuts. This effectively increases the number of sealing surfaces, greatly improves the sealing performance, and makes the installation and use of the pressure regulating valve more stable.

[0025] Each sealing edge 302 has an annular groove 304 on its inner and outer sides, and a sealing ring 8 is embedded in each groove 304. The sealing edge 302 is sealed between the sealing ring 8 and the side walls of the first sealing groove 202 and the second sealing groove 103.

[0026] The two grooves 304 on each sealing edge 302 are staggered instead of being longitudinally aligned, which effectively reduces the reduction in strength of the sealing edge 302 at the grooves 304.

[0027] There are two fixing rings 303, which are located at both ends of the outer circumferential wall of the connecting ring 301. Multiple limiting grooves 305 are evenly provided on opposite sides of each fixing ring 303. A first through groove 306 with its bottom connected to the limiting groove 305 and its width smaller than the diameter of the limiting groove 305 is provided on the outer circumferential wall of each fixing ring 303. A second through groove 9 with its circumferential groove 306 is provided on the outer circumferential wall of the first flange 102 and the second flange 201. The first flange 102, the second flange 201 and the corresponding fixing rings 303 are fixed together by bolts 4 and nuts 5. The nuts of the bolts 4 are embedded in the limiting grooves 305. The bolt 4 shank passes through the first through groove 306 and the second through groove 9. The nuts 5 are pressed against the outer walls of the corresponding first flange 102 and second flange 201. In this embodiment, both the first through groove 306 and the second through groove 9 are U-shaped structures. In this embodiment, the opening size of the upper opening end of the limiting groove 305 is smaller than the diameter of the nut and larger than or equal to the diameter of the bolt 4. During installation, it can be ensured that after the nut is inserted into the limiting groove 305 and the nut 5 is tightened on the bolt 4, the bolt 4 will not slide outward from the groove of the first through groove 306, the U-shaped groove 701 and the second through groove 9 that are aligned together.

[0028] On the outer wall of the first flange 102 and the second flange 201, a washer groove 10 is provided for each bolt 4. A washer 6 is provided in the washer groove 10 to fit onto the corresponding bolt 4. There are two nuts 5 on each bolt 4. The two nuts are set to abut against each other, and the inner nut 5 is set to abut against the washer 6. This can effectively prevent loosening. The washer groove 10 limits the washer 6 and works together with the limiting groove 305 to minimize the possibility of bolt 4 misalignment when the bolt 4 and nut 5 are connected.

[0029] A sealing gasket 7 is provided between the first flange 102, the second flange 201 and the corresponding retaining ring 303, and the sealing gasket 7 is provided with a U-shaped groove 701 at each bolt 4, and the bolt 4 is set through the U-shaped groove 701.

[0030] In this embodiment, the connector 3 is an integrally formed structure.

[0031] The working process of this embodiment is as follows:

[0032] During installation, the sealing gaskets 7 on both sides are fitted onto the corresponding sealing edges 302, and the sealing rings 8 are installed in the grooves 304. The sealing edges 302 on both sides of the connecting ring 301 are inserted into the first sealing groove 202 and the second sealing groove 103 respectively, and the two sealing grooves are sealed by the sealing rings 8. Then, the bolts 4 are inserted from the outside to the inside into the first through groove 306, the U-shaped groove 701, and the second through groove 9, and the nuts are inserted into the limiting groove 305. The washers 6 are then fitted onto the bolts 4 and inserted into the washer groove 10. Finally, the nuts 5 are tightened on the bolts 4, thus achieving the sealing and fixing between the connector 3, the pipe 2, and the connecting section 101.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An installation structure for a pressure regulating valve for a gas pipeline, comprising connecting sections disposed at both ends of the pressure regulating valve body, each connecting section having a pipe on its outer side, and each connecting section having a first flange circumferentially disposed on the outer side of its port, and each pipe having a second flange circumferentially disposed on the outer side of its end facing the connecting section, characterized in that: Each connection segment is fixedly connected to the pipeline by a connector. An annular first sealing groove is provided at the end of the pipeline facing the connection segment, and an annular second sealing groove is provided at the port of each connection segment. The connector includes a connecting ring, an annular sealing edge provided at both ends of the connecting ring, and a fixing ring provided on the outer circumferential wall of the connecting ring. The two sealing edges are respectively sealed and inserted into the corresponding first sealing groove and second sealing groove. The fixing ring is fixedly connected to the first flange and the second flange.

2. The installation structure of a pressure regulating valve for a gas pipeline according to claim 1, characterized in that: Each sealing edge has an annular groove on its inner and outer sides, and a sealing ring is embedded in each groove. The sealing edge is sealed between the sealing ring and the side walls of the first sealing groove and the second sealing groove.

3. The installation structure of a pressure regulating valve for a gas pipeline according to claim 2, characterized in that: The two grooves on each sealing edge are staggered.

4. The installation structure of a pressure regulating valve for a gas pipeline according to claim 1, characterized in that: There are two fixing rings, which are located at both ends of the outer circumferential wall of the connecting ring. Multiple limiting grooves are evenly provided on opposite sides of each fixing ring. A first through groove with its bottom connected to the limiting groove and its width smaller than the diameter of the limiting groove is provided on the outer circumferential wall of each fixing ring. A second through groove is provided on the outer circumferential wall of the first flange and the second flange, which is aligned with the first through groove. The first flange, the second flange and the corresponding fixing ring are fixed together by bolts and nuts. The bolt nuts are embedded in the limiting grooves, and the bolt shanks pass through the first and second through grooves. The nuts are pressed against the outer walls of the corresponding first flange and the second flange.

5. The installation structure of a pressure regulating valve for a gas pipeline according to claim 4, characterized in that: On the outer wall of the first flange and the second flange, there is a washer groove corresponding to each bolt. A washer is provided in the washer groove and fitted onto the corresponding bolt. There are two nuts on each bolt. The two nuts are tightened against each other, and the inner nut is tightened against the washer.

6. The installation structure of a pressure regulating valve for a gas pipeline according to claim 4, characterized in that: A sealing gasket is provided between the first flange, the second flange and the corresponding retaining ring, and the sealing gasket is provided with a U-shaped groove at each bolt, through which the bolt passes.

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