A regulating valve outlet pressure reducing assembly

Abstract

This utility model discloses a pressure-reducing assembly for the outlet of a regulating valve, including a pressure-reducing unit. The pressure-reducing unit includes a pressure-reducing pipe, a retaining ring, and a throttling plate. The pressure-reducing pipe includes a tapered section and a first straight pipe section fixedly connected to the constricted end and flared end of the tapered section, respectively. A first annular groove is provided along the inner circumference of the tapered section. A support surface is provided on the side of the first annular groove near the first straight pipe section, and a limiting surface is provided on the side of the first annular groove near the second straight pipe section. The inner end of the limiting surface is located on the inner wall of the tapered section, and the outer end of the limiting surface is inclined away from the axis of the tapered section. The edge of the throttling plate is disposed in the first annular groove and abuts against the support surface. The retaining ring is made of elastic material and has a tapered surface parallel to the outer wall of the tapered section on its outer side. The retaining ring is disposed in the first annular groove, with its front abutting against the throttling plate and its rear abutting against the outer end of the limiting surface. This utility model proposes a pressure-reducing assembly for the outlet of a regulating valve, which is easy to install with the mounting plate and the pressure-reducing pipe is not easily deformed.

Description

Technical Field

[0001] This utility model relates to the field of pressure reducing components, and in particular to a pressure reducing component for the outlet of a regulating valve. Background Technology

[0002] Existing pressure-reducing components for regulating valves reduce high-pressure gas in high-pressure pipelines to low-pressure gas through regulating valves. When the pressure difference between the gas before and after the regulating valve is large, the gas is prone to generating significant noise as it passes through the regulating valve. Therefore, existing pressure-reducing components for regulating valves install a pressure-reducing pipe at the outlet of the regulating valve and weld a throttling plate into the pressure-reducing pipe. The gas is depressurized twice by the regulating valve and the throttling plate to reach the target pressure, thereby reducing the pressure difference between the two sides of the regulating valve and reducing the noise of the regulating valve.

[0003] The existing throttling plate is fixed in the pressure reducing pipe by manual welding. On the one hand, it is labor-intensive and requires workers to have a high level of welding experience. On the other hand, welding can easily cause deformation of the pressure reducing pipe, thereby affecting its sealing performance. Utility Model Content

[0004] To address the shortcomings of existing pressure-reducing assemblies for regulating valves, such as cumbersome installation of the throttle plate and easy deformation of the pressure-reducing pipe during installation, this invention proposes a pressure-reducing assembly for the outlet of a regulating valve. This assembly features a convenient mounting plate and a pressure-reducing pipe that is less prone to deformation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pressure-reducing assembly for a regulating valve outlet includes a pressure-reducing unit. The pressure-reducing unit includes a pressure-reducing pipe, a retaining ring, and a throttling plate. The pressure-reducing pipe includes a tapered section and a first straight pipe section fixedly connected to the constricted end and the flared end of the tapered section, respectively. A first annular groove is provided along the inner circumference of the tapered section. A support surface is provided on the side of the first annular groove near the first straight pipe section, and a limiting surface is provided on the side of the first annular groove near the second straight pipe section. The inner end of the limiting surface is located on the inner wall of the tapered section, and the outer end of the limiting surface is inclined away from the axis of the tapered section. The edge of the throttling plate is disposed in the first annular groove and abuts against the support surface. The retaining ring is made of elastic material and has a tapered surface parallel to the outer wall of the tapered section on its outer side. The retaining ring is disposed in the first annular groove, with its front side abutting against the throttling plate and its rear side abutting against the outer end of the limiting surface.

[0007] With the above settings, the throttle plate can be installed without welding, making the installation more convenient, reducing the skill requirements for workers, and reducing the deformation of the pressure reducing pipe.

[0008] Furthermore, a second annular groove is provided on the rear side of the retaining ring along the circumferential direction, which forks to form a windproof edge and a retaining edge arranged inside and outside. The rear end of the windproof edge abuts against the inner end of the limiting surface, and the rear end of the retaining edge abuts against the outer end of the limiting surface.

[0009] By adopting the above settings, the elastic deformation capability of the rear side of the retaining ring is increased, making it easier for the retaining ring to be installed into the first annular groove.

[0010] Furthermore, the inner side of the windbreak edge is flush with the inner wall of the cone tube section.

[0011] The above settings reduce the noise of the pressure reduction unit.

[0012] Furthermore, the support surface is provided with a mounting groove along the circumference, and the pressure reducing unit also includes a sealing ring, which is installed in the mounting groove and presses against the front side of the throttle plate.

[0013] The above settings achieve two objectives: first, to improve the airtightness between the edge of the throttle plate and the supporting surface; and second, to reduce the forward and backward movement of the throttle plate, thereby reducing noise.

[0014] Furthermore, the throttling plate is located in the middle of the tapered tube section.

[0015] Furthermore, the pressure reducing assembly also includes a connection unit, which includes a connecting pipe and a flange. The flange is integrally formed at the front end of the connecting pipe and is connected to the outlet end of the regulating valve by bolts. The rear end of the connecting pipe is welded to the first straight pipe section.

[0016] With the above setup, the front end of the pressure reducing unit is connected to the outlet end of the regulating valve via a connecting unit.

[0017] Furthermore, multiple pressure reducing units are provided, and each pressure reducing unit also includes a slag-blocking pipe, which is fixedly connected to the front end of the first straight pipe section.

[0018] In the frontmost pressure reducing unit, the slag-blocking pipe is attached to the inner wall of the connecting pipe, and the front end of the first straight pipe section is welded to the connecting pipe.

[0019] In two adjacent pressure reducing units, the first straight pipe section on the rear side is adapted to the second straight pipe section on the front side and welded together, and the slag-blocking pipe on the rear side is attached to the inner wall of the second straight pipe section on the front side.

[0020] The above settings achieve two objectives: first, to prevent welding slag from falling into the pressure reducing assembly; and second, to increase the number of pressure reducing units and improve the pressure reducing effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the pressure-reducing component in an embodiment.

[0022] Figure 2 This is a rear view of the pressure relief assembly in an embodiment.

[0023] Figure 3 This is a cross-sectional view of the pressure-reducing component in an embodiment.

[0024] Figure 4 for Figure 3Enlarged view of point A.

[0025] Figure 5 for Figure 3 Enlarged view of point B.

[0026] Figure 6 for Figure 3 Enlarged view of point C. Detailed Implementation

[0027] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0028] like Figures 1 to 6 A pressure-reducing assembly for a regulating valve outlet includes a pressure-reducing unit 3. The pressure-reducing unit 3 includes a pressure-reducing pipe 31, a retaining ring 32, and a throttling plate 33. The pressure-reducing pipe 31 includes a tapered pipe section 311 and a first straight pipe section 312 fixedly connected to the constricted end and the flared end of the tapered pipe section 311, respectively. A first annular groove 314 is provided along the inner circumference of the tapered pipe section 311. A support surface 315 is provided on the side of the first annular groove 314 near the first straight pipe section 312. A support surface 315 is provided on the side of the first annular groove 314 near the second straight pipe section 313. A limiting surface 316 is provided on the side. The inner end of the limiting surface 316 is located on the inner wall of the tapered tube section 311, and the outer end of the limiting surface 316 is inclined away from the axis of the tapered tube section 311. The edge of the throttle plate 33 is set in the first annular groove 314 and abuts against the support surface 315. The retaining ring 32 is made of elastic material and has a tapered surface on its outer side that is parallel to the outer wall of the tapered tube section 311. The retaining ring 32 is set in the first annular groove 314. The front side of the retaining ring 32 abuts against the throttle plate 33, and the rear side of the retaining ring 32 abuts against the outer end of the limiting surface 316.

[0029] With the above settings, the throttle plate 33 can be installed without welding, making the installation of the throttle plate 33 more convenient, reducing the skill requirements for workers, and reducing the deformation of the pressure reducing pipe 31.

[0030] Figure 3 The front and rear directions of the pressure reducing assembly are indicated. For pressure reducing unit 3, the side facing the regulating valve 4 is the front side, and the side facing away from the regulating valve 4 is the rear side. The pressure reducing pipe 31 is an integrally formed structure. The tapered pipe section 311, the first straight pipe section 312, and the second straight pipe section 313 are coaxially arranged. The first straight pipe section 312 and the second straight pipe section 313 are specifically circular pipe structures with unchanged inner diameters. The tapered pipe section 311 is a frustum-shaped structure with a constricted front end and an flared rear end. The constricted end of the tapered pipe section 311 faces the regulating valve 4, and the inner diameter of the constricted end is the same as the inner diameter of the first straight pipe section 312. The flared end of the tapered pipe section 311 faces away from the regulating valve 4, and the inner diameter of the flared end is the same as the inner diameter of the second straight pipe section 313.

[0031] The support surface 315 is perpendicular to the axis of the tapered tube section 311. The first annular groove 314 also includes a sealing surface and a connecting surface disposed between the support surface 315 and the limiting surface 316. The sealing surface is parallel to the outer surface of the tapered tube section 311. The front side of the sealing surface is connected to the outer end of the support surface 315, and the rear side of the sealing surface transitions to the outer end of the limiting surface 316 through the connecting surface. The connecting surface is parallel to the axis of the tapered tube section 311. When the throttle plate 33 is installed, the edge of the throttle plate 33 passes forward through the limiting surface 316 and fits against the support surface 315. The outer circumferential surface of the throttle plate 33 is in contact with the sealing surface of the first annular groove 314; holding the retaining ring 32, push the retaining ring 32 forward, the inner wall of the tapered tube section 311 squeezes the tapered surface on the outer side of the retaining ring 32, causing the retaining ring 32 to undergo inward elastic deformation, the outer diameter of the retaining ring 32 shrinks, when the front side of the retaining ring 32 abuts against the rear side of the throttle plate 33, the retaining ring 32 automatically springs back outward, the rear side of the retaining ring 32 springs back outward and enters the first annular groove 314, and abuts against the limiting surface 316, preventing the throttle plate 33 from disengaging from the supporting surface 315, such as Figure 5 At this time, the outer side of the retaining ring 32 fits against the sealing surface and the connecting surface to ensure good airtightness.

[0032] When using the pressure-reducing assembly of this application, the front end of the first straight pipe section 312 is connected to the outlet end of the regulating valve 4, the rear end of the second straight pipe section 313 is connected to the low-pressure pipeline, and the inlet end of the regulating valve 4 is connected to the high-pressure pipeline. The high-pressure gas in the high-pressure pipeline is first depressurized by the regulating valve 4 and then depressurized a second time by the throttling plate 33 before entering the low-pressure pipeline.

[0033] As one implementation, the rear side of the retaining ring 32 is provided with a second annular groove 321 along the circumferential direction, which forks to form a windproof edge 322 and a retaining edge 323 arranged inside and outside. The rear end of the windproof edge 322 abuts against the inner end of the limiting surface 316, and the rear end of the retaining edge 323 abuts against the outer end of the limiting surface 316.

[0034] The above settings increase the elastic deformation capability of the rear side of the retaining ring 32, making it easier for the retaining ring 32 to be inserted into the first annular groove 314.

[0035] The cross-section of the second annular groove 321 of this application is specifically V-shaped, forming a thinner retaining edge 323, which facilitates the elastic deformation of the retaining edge 323. The conical surface on the outer side of the retaining ring 32 extends to the retaining edge 323. When the retaining ring 32 is installed, after the inner wall of the conical tube section 311 squeezes the conical surface, the retaining edge 323 undergoes elastic deformation inward, and the opening of the second annular groove 321 shrinks. When the front side of the retaining ring 32 abuts against the throttle plate 33, the rear end of the retaining edge 323 rebounds outward, enters the second annular groove 321, and abuts against the outer end of the limiting surface 316.

[0036] As one implementation method, the inner side of the windbreak edge 322 is flush with the inner wall of the cone tube section 311.

[0037] The above settings reduce the noise of the pressure reduction unit 3.

[0038] like Figure 5 The inner side of the retaining ring 32 is flush with the inner wall of the tapered tube section 311, so the airflow is less disturbed and the noise is less when it passes through the retaining ring 32.

[0039] As one implementation, the support surface 315 is provided with a mounting groove along the circumference, and the pressure reducing unit 3 also includes a sealing ring 34, which is installed in the mounting groove and presses against the front side of the throttle plate 33.

[0040] With the above settings, firstly, the airtightness between the edge of the throttle plate 33 and the support surface 315 is improved; secondly, the forward and backward movement of the throttle plate 33 is reduced, thereby reducing noise.

[0041] Specifically, the sealing ring 34 is made of a material with good elasticity, such as rubber. When the sealing ring 34 compresses the throttle plate 33, it improves the airtightness between the throttle plate 33 and the support surface 315. In addition, it prevents the gap between the rear side of the retaining ring 32 and the limiting surface 316, thereby preventing the retaining ring 32 and the throttle plate 33 from moving back and forth and vibrating, and reducing the vibration of the pressure reducing assembly during operation.

[0042] As one implementation method, the throttle plate 33 is located in the middle of the tapered tube section 311.

[0043] As one implementation method, the pressure reducing assembly also includes a connection unit 5, which includes a connecting pipe 51 and a flange 52. The flange 52 is integrally formed at the front end of the connecting pipe 51 and is connected to the outlet end of the regulating valve 4 by bolts. The rear end of the connecting pipe 51 is welded to the first straight pipe section 312.

[0044] With the above setup, the front end of the pressure reducing unit 3 is connected to the outlet end of the regulating valve 4 via the connecting unit 5.

[0045] The front end of the connecting unit 5 is sealed to the outlet end of the regulating valve 4 via flange 52 and bolts, ensuring good airtightness. The rear end of the connecting pipe 51 of the connecting unit 5 is fixedly connected to the front end of the first straight pipe section 312 of the pressure reducing unit 3 via welding. With the above settings, the pressure reducing unit 3 will not be directly welded to the regulating valve 4, reducing damage to the regulating valve 4 and facilitating subsequent replacement of the pressure reducing unit 3.

[0046] As one implementation method, multiple pressure reducing units 3 are provided, and the pressure reducing unit 3 also includes a slag blocking pipe 35, which is fixedly connected to the front end of the first straight pipe section 312;

[0047] In the foremost pressure reducing unit 3, the slag-blocking pipe 35 is attached to the inner wall of the connecting pipe 51, and the front end of the first straight pipe section 312 is welded to the connecting pipe 51.

[0048] In the two adjacent pressure reducing units 3, the first straight pipe section 312 on the rear side is adapted to the second straight pipe section 313 on the front side and welded together, and the slag-blocking pipe 35 on the rear side is attached to the inner wall of the second straight pipe section 313 on the front side.

[0049] The above settings achieve two objectives: first, to prevent welding slag from falling into the pressure reducing assembly; and second, to increase the number of pressure reducing units 3 and improve the pressure reducing effect.

[0050] The front end of the first straight pipe section 312 of the foremost pressure reducing unit 3 is close to the rear end of the connecting pipe 51, such as... Figure 4 There is a gap between the first straight pipe section 312 and the connecting pipe 51. The slag-blocking pipe 35 is located inside this gap. During welding, the slag-blocking pipe 35 can block the welding slag and prevent it from falling in; similarly, if Figure 6 In two adjacent pressure reducing units 3, the front end of the first straight pipe section 312 on the rear side is close to the rear end of the second straight pipe section 313 on the rear side, with a gap between them. The slag-blocking pipe 35 of the rear pressure reducing unit 3 is inserted into the rear end of the second straight pipe section 313 on the front side, as shown. Figure 6 When the second straight pipe section 313 is welded together with the first straight pipe section 312, welding slag will not fall in.

[0051] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A pressure reducing assembly at the outlet of a regulating valve, characterized in that, The device includes a pressure-reducing unit, which comprises a pressure-reducing pipe, a retaining ring, and a throttling plate. The pressure-reducing pipe includes a tapered pipe section and a first straight pipe section and a second straight pipe section, which are respectively fixedly connected to the constricted end and the flared end of the tapered pipe section. A first annular groove is provided along the inner circumference of the tapered pipe section. A support surface is provided on the side of the first annular groove near the first straight pipe section, and a limiting surface is provided on the side of the first annular groove near the second straight pipe section. The inner end of the limiting surface is located on the inner wall of the tapered pipe section, and the outer end of the limiting surface is inclined away from the axis of the tapered pipe section. The edge of the throttling plate is disposed in the first annular groove and abuts against the support surface. The retaining ring is made of elastic material and has a tapered surface on its outer side that is parallel to the outer wall of the tapered pipe section. The retaining ring is disposed in the first annular groove, with its front side abutting against the throttling plate and its rear side abutting against the outer end of the limiting surface.

2. The regulating valve outlet pressure reducing assembly according to claim 1, characterized in that, The rear side of the retaining ring is provided with a second annular groove along the circumference, which forks to form a windproof edge and a retaining edge arranged inside and outside. The rear end of the windproof edge abuts against the inner end of the limiting surface, and the rear end of the retaining edge abuts against the outer end of the limiting surface.

3. The regulating valve outlet pressure reducing assembly according to claim 2, characterized in that, The inner side of the windbreak is flush with the inner wall of the cone-shaped tube section.

4. The regulating valve outlet pressure reducing assembly according to claim 2, characterized in that, The support surface is provided with a mounting groove along the circumference, and the pressure reducing unit also includes a sealing ring, which is installed in the mounting groove and presses against the front side of the throttle plate.

5. A regulating valve outlet pressure reducing assembly according to claim 2, characterized in that, The throttling plate is located in the middle of the tapered tube section.

6. The regulating valve outlet pressure reducing assembly according to claim 2, characterized in that, The pressure reducing assembly also includes a connecting unit, which includes a connecting pipe and a flange. The flange is integrally formed at the front end of the connecting pipe and is connected to the outlet end of the regulating valve by bolts. The rear end of the connecting pipe is welded to the first straight pipe section.

7. A regulating valve outlet pressure reducing assembly according to claim 6, characterized in that, Multiple pressure reducing units are provided, and each pressure reducing unit also includes a slag-blocking pipe, which is fixedly connected to the front end of the first straight pipe section; In the frontmost pressure reducing unit, the slag-blocking pipe is attached to the inner wall of the connecting pipe, and the front end of the first straight pipe section is welded to the connecting pipe. In two adjacent pressure reducing units, the first straight pipe section on the rear side is adapted to the second straight pipe section on the front side and welded together, and the slag-blocking pipe on the rear side is attached to the inner wall of the second straight pipe section on the front side.

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