Buffering pore plate, pipeline and compressor unit

Abstract

The utility model relates to the technical field of compressors, in particular to a buffering pore plate, a pipeline and a compressor unit, the buffering pore plate is arranged in the pipeline through a flange, the buffering pore plate is provided with a buffering hole used for buffering a working medium in the pipeline, the end, facing the buffering pore plate, of the flange is provided with a first sealing face, and a first sealing groove is formed in the first sealing face; a second sealing surface is arranged at one end, facing the flange, of the buffer pore plate; a second sealing groove is formed in the second sealing surface; wherein the gaskets between the buffering pore plate and the flange are arranged in the first sealing groove and the second sealing groove and used for positioning the buffering pore plate, the gaskets and the flange in the axial direction, the gaskets can be well positioned through the buffering pore plate, and then the reliability and the sealing performance of connection are guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a buffer orifice plate, a pipeline and a compressor unit. Background Art

[0002] The process gas system pipelines of reciprocating natural gas compressor units typically feature orifice plates at the compressor cylinder inlet and outlet, as well as at the outlet of the exhaust buffer tank after compression, to reduce unit pulsation. These orifice plates are installed in the pipelines by means of flange compression. Flanges include raised-face flanges and ring-seal flanges. The raised-face flange has a flat sealing surface with a larger contact area, but the gasket between the orifice plate and the raised-face flange is prone to displacement, compromising sealing performance. Current orifice plates, when mated with ring-seal flanges, also suffer from a lack of positioning and are prone to displacement, impacting the reliability and sealing of the connection. Utility Model Content

[0003] The purpose of the present application is to provide a buffer orifice plate, a pipeline and a compressor unit, wherein the buffer orifice plate can well position the gasket, thereby ensuring the reliability and sealing of the connection.

[0004] To this end, on the first aspect, an embodiment of the present application provides a buffer orifice plate, which is arranged in a pipeline through a flange, and the buffer orifice plate has a buffer hole for buffering the working medium in the pipeline, and a first sealing surface is provided on the end of the flange facing the buffer orifice plate, and a first sealing groove is provided on the first sealing surface; a second sealing surface is provided on the end of the buffer orifice plate facing the flange, and a second sealing groove is provided on the second sealing surface; wherein, the gasket between the buffer orifice plate and the flange is provided in the first sealing groove and the second sealing groove, for axially positioning the buffer orifice plate, the gasket and the flange.

[0005] In a possible implementation, the radial width of the first sealing groove is gradually reduced toward the buffer orifice plate; and / or the radial width of the second sealing groove is gradually reduced toward the flange facing the first sealing groove.

[0006] In one possible implementation, the cross-section of the first sealing groove is one of an isosceles trapezoid, a right trapezoid, an isosceles triangle and a right triangle; and / or the cross-section of the second sealing groove is one of an isosceles trapezoid, a right trapezoid, an isosceles triangle and a right triangle.

[0007] In a possible implementation, when the gasket is fixed between the buffer orifice plate and the flange, the gasket includes a first portion located in the first sealing groove, a second portion located in the second sealing groove, and a third portion located between the buffer orifice plate and the flange.

[0008] In one possible implementation, multiple first sealing grooves are provided on the first sealing surface, and multiple second sealing grooves are provided on the second sealing surface. The multiple second sealing grooves are respectively arranged opposite to the multiple first sealing grooves, and a gasket is provided between each oppositely arranged first sealing groove and second sealing groove.

[0009] In one possible implementation, the buffer orifice plate is arranged between two flanges, and the two flanges clamp the buffer orifice plate through fasteners. The buffer orifice plate includes a main body and a handle arranged on the outer periphery of the main body. The main body is respectively provided with a second sealing surface and a second sealing groove at both ends along the axial direction.

[0010] In a possible implementation, a first positioning hole is provided on the handle, a distance between the first positioning hole and the central axis of the main body is equal to a distance between the fastener and the central axis of the flange, and the fastener passes through the first positioning hole.

[0011] In a possible implementation, the buffer orifice plate further includes a positioning portion disposed on the outer periphery of the main body, a second positioning hole is disposed on the positioning portion around the center of the main body, and two fasteners pass through the first positioning hole and the second positioning hole respectively.

[0012] In a second aspect, an embodiment of the present application provides a pipeline, comprising: a pipe body and a flange arranged at the end of the pipe body; the above-mentioned buffer orifice plate, the buffer orifice plate is connected to the pipeline through the flange; and a gasket, arranged between the flange and the buffer orifice plate.

[0013] In a third aspect, an embodiment of the present application provides a compressor unit comprising the above-mentioned pipeline.

[0014] According to the buffer orifice plate, pipeline and compressor unit provided in the embodiments of the present application, the buffer orifice plate positions the gasket through the second sealing groove and the first sealing groove, thereby achieving effective positioning of the gasket and achieving axial positioning of the buffer orifice plate and the flange, thereby ensuring the reliability and sealing of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a buffer orifice plate provided in an embodiment of the present application is shown;

[0019] Figure 2 A schematic diagram of the planar structure of a buffer orifice plate provided in an embodiment of the present application is shown;

[0020] Figure 3 Show Figure 2 Schematic diagram of the cross-section structure along the AA direction;

[0021] Figure 4 A schematic cross-sectional structure diagram of a buffer orifice plate provided in an embodiment of the present application is shown;

[0022] Figure 5 A schematic structural diagram showing a cross section of another buffer orifice plate provided in an embodiment of the present application;

[0023] Figure 6 A schematic cross-sectional structure diagram of another buffer orifice plate provided in an embodiment of the present application is shown;

[0024] Figure 7 A schematic cross-sectional structure diagram of another buffer orifice plate provided in an embodiment of the present application is shown;

[0025] Figure 8 A schematic diagram of the three-dimensional structure of a pipeline provided in an embodiment of the present application is shown;

[0026] Figure 9 A schematic diagram of a cross-sectional structure of a pipeline provided in an embodiment of the present application is shown;

[0027] Figure 10 A schematic structural diagram of a flange and a pipe body provided in an embodiment of the present application is shown.

[0028] Description of reference numerals:

[0029] 1. Flange; 11. First sealing surface; 12. First sealing groove;

[0030] 2. Pipe body;

[0031] 3. Buffering hole plate; 31. Buffering hole; 32. Second sealing surface; 33. Second sealing groove; 34. Main body; 35. Handle; 351. First positioning hole; 36. Positioning portion; 361. Second positioning hole; 37. Buffering portion;

[0032] 4. Gasket;

[0033] 5. Fasteners. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. 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.

[0035] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present application. In order to simplify the disclosure of the embodiments of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the embodiments of the present application. In addition, the embodiments of the present application may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0036] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or a change in motion, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will subsequently be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0037] In order to solve the problems in the prior art, the present application provides a buffer orifice plate, a pipeline and a compressor unit. The buffer orifice plate can well position the gasket, thereby ensuring the reliability and sealing of the connection.

[0038] like Figure 1-7As shown, an embodiment of the present application provides a buffer orifice plate 3, which is arranged in the pipeline through a flange 1. The buffer orifice plate 3 has a buffer hole 31 for buffering the working medium in the pipeline. A first sealing surface 11 is provided at one end of the flange 1 facing the buffer orifice plate 3, and a first sealing groove 12 is provided on the first sealing surface 11; a second sealing surface 32 is provided at one end of the buffer orifice plate 3 facing the flange 1, and a second sealing groove 33 is provided on the second sealing surface 32; wherein, the gasket 4 between the buffer orifice plate 3 and the flange 1 is provided in the first sealing groove 12 and the second sealing groove 33, for axially positioning the buffer orifice plate 3, the gasket 4 and the flange 1.

[0039] In the present application, the gasket 4 is positioned by the second sealing groove 33 and the first sealing groove 12, thereby achieving effective positioning of the gasket 4 and achieving axial positioning of the buffer orifice plate 3 and the flange 1, thereby ensuring the reliability and sealing of the connection.

[0040] Specifically, the working medium in the pipeline is prone to pulsation when it is transported in a reciprocating manner. By setting the buffer orifice plate 3, the working medium is effectively buffered when passing through the buffer hole 31, thereby reducing the pulsation. The buffer hole 31 includes a non-step hole form (such as Figure 4 ), double-sided stepped hole form with symmetry on both sides (such as Figure 5 ), upstream single-sided stepped hole form (such as Figure 6 ), downstream single-sided stepped hole form (such as Figure 7 ). Use the corresponding orifice plate type according to the actual needs of the natural gas pipeline.

[0041] In the related art, orifice plates are usually installed at the inlet and outlet of the compressor cylinder and the outlet of the exhaust buffer tank after the gas is compressed by the compressor in the process gas system of the reciprocating natural gas compressor unit to reduce the pulsation of the unit. Among them, the flange 1 includes a convex flange 1 and a ring sealing surface flange 1. When the convex flange 1 is matched with the orifice plate, the sealing surface of the convex flange 1 is flat and has a large contact surface. However, the gasket 4 between the orifice plate and the convex flange 1 is prone to displacement and affects the sealing performance, so it is only suitable for low-pressure working conditions. In the compressor unit, due to the high pressure in the internal pipeline, the flange 1 generally selects the ring sealing surface flange 1, that is, the first sealing surface 11 of the flange 1 is provided with a first sealing groove 12. When the current orifice plate is matched with the ring sealing surface flange 1, the gasket 4 is also prone to displacement due to lack of positioning, affecting the reliability and sealing of the connection.

[0042] In the embodiment of the present application, by using the annular sealing surface flange 1 with the first sealing groove 12, it can be applied to high-pressure working conditions. One end of the gasket 4 is located in the first sealing groove 12 to achieve axial positioning with the flange 1, and the other end is located in the second sealing groove 33 to achieve axial positioning with the buffer orifice plate 3, thereby ensuring the positioning effect of the gasket 4 and the axial alignment of the buffer orifice plate 3 and the flange 1. In addition, the reliability of the connection between the buffer orifice plate 3 and the flange 1 is guaranteed.

[0043] Specifically, the first sealing groove 12 is an annular groove coaxial with the flange 1 , the second sealing groove 33 is an annular groove coaxial with the buffer orifice plate 3 , and the gasket 4 is an annular gasket 4 .

[0044] The buffer orifice plate 3 in this application, the second sealing groove 33 is designed according to the first sealing groove 12, the angle tolerance between the second sealing groove 33 and the first sealing groove 12 is ±0.5°, the width tolerance between the second sealing groove 33 and the first sealing groove 12 is ±0.2mm, the depth tolerance between the second sealing groove 33 and the first sealing groove 12 is 0-0.4mm, the rounding tolerance between the second sealing groove 33 and the first sealing groove 12 is 0-0.8mm, and the roughness of the groove processing surface obtained by the material removal method is 1.6μm. This processing accuracy needs to be strictly guaranteed to meet the sealing performance of the RJ flange 1 ring connection surface plate.

[0045] In some embodiments, the radial width of the first sealing groove 12 is gradually reduced toward the buffer orifice plate 3 ; and / or the radial width of the second sealing groove 33 is gradually reduced toward the flange 1 facing it.

[0046] In a specific embodiment, the radial width of the first sealing groove 12 is gradually tapered toward the buffer orifice plate 3. When the flange 1 and the buffer orifice plate 3 press the gasket 4, the gasket 4 can fully abut against the inner wall of the first sealing groove 12, further improving the sealing of the connection.

[0047] In another specific embodiment, the radial width of the second sealing groove 33 is gradually tapered toward the flange 1. When the flange 1 and the buffer orifice plate 3 press the gasket 4, the gasket 4 can fully abut against the inner wall of the second sealing groove 33, further improving the sealing of the connection.

[0048] In another specific embodiment, the radial width of the first sealing groove 12 is gradually tapered toward the buffer orifice plate 3, and the radial width of the second sealing groove 33 is gradually tapered toward the flange 1. When the flange 1 and the buffer orifice plate 3 press the gasket 4, the gasket 4 can be fully abutted against both the first sealing groove 12 and the second sealing groove 33, thereby improving the sealing of the connection.

[0049] In some embodiments, the cross-section of the first sealing groove 12 is one of an isosceles trapezoid, a right trapezoid, an isosceles triangle and a right triangle; and / or the cross-section of the second sealing groove 33 is one of an isosceles trapezoid, a right trapezoid, an isosceles triangle and a right triangle.

[0050] In this application, the gasket 4 is a standard component used in pipeline connection seals. The radial widths of the first sealing groove 12 and the second sealing groove 33 are gradually varied. This can be achieved by configuring the cross-sections of the first sealing groove 12 and the second sealing groove 33 to be an isosceles trapezoid, a right-angled trapezoid, an isosceles triangle, or a right-angled triangle. Of course, the cross-sections of the first sealing groove 12 and the second sealing groove 33 are not limited to the aforementioned shapes; any cross-sections can be configured to achieve a gradual change in the radial widths of the first sealing groove 12 and the second sealing groove 33.

[0051] like Figure 3-7 As shown, preferably, the cross-sections of the first sealing groove 12 and the second sealing groove 33 in the present application both adopt an isosceles trapezoidal structure, the maximum widths of the first sealing groove 12 and the second sealing groove 33 are smaller than the radial width of the gasket 4, and the minimum widths of the first sealing groove 12 and the second sealing groove 33 are smaller than the radial width of the gasket 4. When the flange 1 and the buffer orifice plate 3 clamp the gasket 4, the gasket 4 can be squeezed by the inner surfaces of the first sealing groove 12 and the second sealing groove 33, thereby making the gasket 4 fully abut against the inner surfaces of the first sealing groove 12 and the second sealing groove 33, thereby ensuring sealing and positioning effects.

[0052] In some embodiments, when the gasket 4 is fixed between the buffer orifice plate 3 and the flange 1 , the gasket 4 includes a first portion located in the first sealing groove 12 , a second portion located in the second sealing groove 33 , and a third portion located between the buffer orifice plate 3 and the flange 1 .

[0053] In the present application, when the gasket 4 is fixed between the buffer orifice plate 3 and the flange 1, that is, when the buffer orifice plate 3 is fixed in the pipeline, the first part of the gasket 4 is located in the first sealing groove 12, which is used to achieve axial positioning and sealing between the gasket 4 and the flange 1; the second part of the gasket 4 is located in the second sealing groove 33, which is used to achieve positioning and sealing between the gasket 4 and the buffer orifice plate 3; the third part of the gasket 4 is located between the buffer orifice plate 3 and the flange 1, so that there is still a gap between the buffer orifice plate 3 and the flange 1, thereby ensuring that the first part is fully in contact with the first sealing groove 12, and the second part can be fully in contact with the second sealing groove 33.

[0054] In some embodiments, a plurality of first sealing grooves 12 are provided on the first sealing surface 11, and a plurality of second sealing grooves 33 are provided on the second sealing surface 32. The plurality of second sealing grooves 33 are respectively arranged opposite to the plurality of first sealing grooves 12, and a gasket 4 is provided between each of the relatively arranged first sealing grooves 12 and second sealing grooves 33.

[0055] In the present application, multiple gaskets 4 are arranged between the buffer orifice plate 3 and the flange 1, and the multiple gaskets 4 are coaxially arranged, which can further improve the axial positioning effect of the buffer orifice plate 3 and the flange 1 as well as the reliability and sealing of the connection.

[0056] In some embodiments, the buffer orifice plate 3 is arranged between two flanges 1, and the two flanges 1 clamp the buffer orifice plate 3 through fasteners 5. The buffer orifice plate 3 includes a main body 34 and a handle 35 arranged on the outer periphery of the main body 34. The main body 34 is respectively provided with a second sealing surface 32 and a second sealing groove 33 at both ends along the axial direction.

[0057] In the present application, the buffer orifice plate 3 is arranged between the two flanges 1, and the two flanges 1 are connected by fasteners 5, thereby fixing the buffer orifice plate 3 in the pipeline. By providing a second sealing surface 32 and a second sealing groove 33 on both sides of the buffer orifice plate 3, it is possible to ensure that the buffer orifice plate 3 is positioned from both ends, further improving the positioning effect of the buffer orifice plate 3. At the same time, the sealing effect on both sides of the buffer orifice plate 3 can be ensured, further improving the sealing of the connection. The handle 35 facilitates the removal and placement of the buffer orifice plate 3. When installing the buffer orifice plate 3, the handle 35 can be used for temporary fixation and alignment; it is also convenient to remove the buffer orifice plate 3 from between the two flanges 1 during disassembly.

[0058] Specifically, the fasteners 5 can be bolts and nuts. The bolts pass through the connection holes of the flanges 1 and are threadedly connected to the nuts to achieve fastening. The two flanges 1 are connected by multiple sets of fasteners 5. The multiple sets of fasteners 5 are arranged along the circumference of the flanges 1 to ensure the connection between the two flanges 1 and the buffer orifice plate 3.

[0059] The buffer orifice plate 3 in the present application also includes a buffer portion 37 arranged on the inner side of the main body 34, and a buffer hole 31 is provided on the buffer portion 37. The thickness of the buffer portion 37 is generally 3 mm or 10 mm, and can also be designed according to actual needs. The connection between the buffer portion 37 and the main body 34 has a chamfer with a radius of at least 1 mm to prevent stress concentration.

[0060] like Figure 1 As shown, in some embodiments, a first positioning hole 351 is provided on the handle 35 , and the distance between the first positioning hole 351 and the central axis of the main body 34 is equal to the distance between the fastener 5 and the central axis of the flange 1 , and the fastener 5 passes through the first positioning hole 351 .

[0061] In the present application, the buffer orifice plate 3 can be further positioned by passing the bolt of the fastener 5 through the first positioning hole 351 on the handle 35, which facilitates positioning when installing the buffer orifice plate 3 and further improves the positioning effect of the buffer orifice plate 3.

[0062] like Figure 2As shown, in some embodiments, the buffer orifice plate 3 also includes a positioning portion 36 arranged on the outer periphery of the main body 34, and a second positioning hole 361 is provided on the positioning portion 36 around the center of the main body 34, and the two fasteners 5 pass through the first positioning hole 351 and the second positioning hole 361 respectively.

[0063] In the present application, two of the multiple fasteners 5 pass through the first positioning hole 351 and the second positioning hole 361 respectively. The first positioning hole 351 and the second positioning hole 361 are both arranged around the center of the main body 34. A circle can be determined by two points on the arc, and then the position of the buffer orifice plate 3 can be determined, and the buffer orifice plate 3 can be further positioned. On the buffer orifice plate 3, it is only necessary to pass the two fasteners 5 through the first positioning hole 351 and the second positioning hole 361 to complete the positioning of the buffer orifice plate 3, further improving the convenience of positioning the buffer orifice plate 3 and the positioning effect of the buffer orifice plate 3.

[0064] In a specific embodiment, the first positioning hole 351 and the second positioning hole 361 are both circular holes, the inner diameter of the circular hole matches the outer diameter of the fastener 5, and the positioning of the two is completed when the fastener 5 passes through the circular hole. The central angle between the first positioning hole 351 and the second positioning hole 361 is equal to the central angle between the two fasteners 5.

[0065] In another specific embodiment, one of the first positioning hole 351 and the second positioning hole 361 is a circular hole, and the other is an arc-shaped hole. First, the fastener 5 is passed through the circular hole for preliminary positioning, and then the fastener 5 is passed through the arc-shaped hole. The arc-shaped hole can adapt to fasteners 5 with different center angles.

[0066] The buffer orifice plate 3 positions the gasket 4 through the second sealing groove 33 and the first sealing groove 12, thereby achieving effective positioning of the gasket 4 and axial positioning of the buffer orifice plate 3 and the flange 1, thereby ensuring the reliability and sealing of the connection.

[0067] like Figure 8-10 As shown, an embodiment of the present application provides a pipeline, including: a pipe body 2 and a flange 1 arranged at the end of the pipe body 2; the above-mentioned buffer orifice plate 3, the buffer orifice plate 3 is connected to the pipeline through the flange 1; and a gasket 4, arranged between the flange 1 and the buffer orifice plate 3.

[0068] In this application, two flanges 1 are provided at locations on the pipeline where a buffer orifice plate 3 is to be installed. The buffer orifice plate 3 is clamped and fixed by the two flanges 1. The gasket 4 between the buffer orifice plate 3 and the flange 1 not only achieves axial positioning of the flange 1, the buffer orifice plate 3, and the gasket 4, but also ensures sealing by the abutment of the gasket 4 with the flange 1 and the buffer orifice plate 3, making it suitable for high-pressure working conditions. When the working medium in the pipeline is reciprocated, the working medium is buffered by the buffer holes 31 on the buffer orifice plate 3, thereby buffering the pulsation of the pipeline.

[0069] An embodiment of the present application provides a compressor unit including the above-mentioned pipeline.

[0070] In this application, the compressor unit is a reciprocating natural gas compressor unit. To reduce the unit's pulsation, a buffer orifice plate 3 is generally installed at the compressor cylinder inlet and outlet, and at the outlet of the exhaust buffer tank after the gas is compressed by the compressor. By adopting the pipeline of this application, it can be applied to high-pressure working conditions, and the axial alignment and sealing effect of the buffer orifice plate 3, gasket 4 and flange 1 can be guaranteed.

[0071] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0072] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0073] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A buffer orifice plate, arranged in a pipeline through a flange (1), the buffer orifice plate (3) having a buffer hole (31) for buffering a working medium in the pipeline, the flange (1) having a first sealing surface (11) at one end facing the buffer orifice plate (3), and a first sealing groove (12) being provided on the first sealing surface (11); characterized in that: A second sealing surface (32) is provided at one end of the buffer orifice plate (3) facing the flange (1), and a second sealing groove (33) is provided on the second sealing surface (32); The gasket (4) between the buffer orifice plate (3) and the flange (1) is arranged in the first sealing groove (12) and the second sealing groove (33) to position the buffer orifice plate (3), the gasket (4) and the flange (1) in the axial direction.

2. The buffer orifice plate according to claim 1, characterized in that: The radial width of the first sealing groove (12) is gradually reduced toward the buffer orifice plate (3); and / or The radial width of the second sealing groove (33) is gradually reduced toward the flange (1) facing it.

3. The buffer orifice plate according to claim 2, characterized in that: The cross section of the first sealing groove (12) is one of an isosceles trapezoid, a right-angled trapezoid, an isosceles triangle and a right-angled triangle; and / or The cross section of the second sealing groove (33) is one of an isosceles trapezoid, a right-angled trapezoid, an isosceles triangle and a right-angled triangle.

4. The buffer orifice plate according to claim 1, characterized in that: When the gasket (4) is fixed between the buffer orifice plate (3) and the flange (1), the gasket (4) comprises a first portion located in the first sealing groove (12), a second portion located in the second sealing groove (33), and a third portion located between the buffer orifice plate (3) and the flange (1).

5. The buffer orifice plate according to claim 1, characterized in that: A plurality of first sealing grooves (12) are provided on the first sealing surface (11), and a plurality of second sealing grooves (33) are provided on the second sealing surface (32). The plurality of second sealing grooves (33) are respectively arranged opposite to the plurality of first sealing grooves (12), and a gasket (4) is provided between each of the first sealing grooves (12) and the second sealing groove (33) arranged opposite to each other.

6. The buffer orifice plate according to claim 1, characterized in that: The buffer orifice plate (3) is arranged between the two flanges (1), and the two flanges (1) clamp the buffer orifice plate (3) through a fastener (5). The buffer orifice plate (3) includes a main body (34) and a handle (35) arranged on the outer periphery of the main body (34). The main body (34) is respectively provided with the second sealing surface (32) and the second sealing groove (33) at both ends along the axial direction.

7. The buffer orifice plate according to claim 6, characterized in that: A first positioning hole (351) is provided on the handle (35), the distance between the first positioning hole (351) and the central axis of the main body (34) is equal to the distance between the fastener (5) and the central axis of the flange (1), and the fastener (5) passes through the first positioning hole (351).

8. The buffer orifice plate according to claim 7, characterized in that: The buffer orifice plate (3) further comprises a positioning portion (36) arranged on the outer periphery of the main body (34), a second positioning hole (361) being arranged on the positioning portion (36) around the center of the main body (34), and the two fasteners (5) respectively pass through the first positioning hole (351) and the second positioning hole (361).

9. A pipeline, characterized in that: include: A pipe body (2) and a flange (1) arranged at the end of the pipe body (2); The buffer orifice plate (3) according to any one of claims 1 to 8, wherein the buffer orifice plate (3) is connected to the pipeline through the flange (1); as well as A gasket (4) is arranged between the flange (1) and the buffer orifice plate (3).

10. A compressor unit, characterized in that: Comprising the pipeline as claimed in claim 9.

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