Compressor valve with in-line seal seat

Abstract

The embodiment of the application provides a compressor gas valve with an embedded sealing seat, comprising a valve cover, a sealing element and a valve seat; the valve cover is assembled with the valve seat as a whole, the sealing element is installed between the valve cover and the valve seat and can reciprocate in a direction away from or close to the valve seat to open or seal a gas flow channel of the valve seat; the valve seat comprises a detachably connected base and a sealing seat, the base and the sealing seat are assembled as a whole to form the valve seat; the sealing element is installed between the valve cover and the sealing seat; the sealing seat can be replaced alone, so that the repairability of the gas valve is improved; meanwhile, the sealing seat can be made of non-metallic materials, so that the sealing performance of the gas valve is improved.

Description

Technical Field

[0001] This utility model relates to the field of design, processing and manufacturing of reciprocating compressor valves, and specifically to a compressor valve with an embedded sealing seat. Background Technology

[0002] A reciprocating compressor, also known as a piston compressor, uses valves to control the intake and exhaust of air during piston movement. These valves, including intake and exhaust valves, are installed in valve holes in the compressor cylinder, connecting to the compressor's intake and exhaust chambers respectively. As the compressor piston reciprocates, the intake and exhaust valves open and close sequentially, completing the four processes of intake, compression, exhaust, and expansion, thus transporting gas from the intake chamber to the exhaust chamber. Valvees are vulnerable components of reciprocating compressors, and their lifespan and performance directly affect the compressor's efficiency and reliability.

[0003] Traditional compressor valves are generally divided into annular and mesh valves. Annular valves have a circular valve disc, while mesh valves consist of circular discs of different diameters connected by reinforcing ribs. Although their shapes differ, their sealing principle is the same: both utilize the edge of the valve disc or valve ring to form a planar or beveled seal with the valve seat. A planar seal causes the airflow to undergo two 90° turns after the valve opens, resulting in significant airflow impact loss and shortening the lifespan of vulnerable parts. A beveled seal refers to the valve seat's sealing surface within the same valve channel being machined into two opposing bevels. The valve ring that mates with this seal uses a rounded R-angle seal, creating a line contact seal between the beveled sealing surface and the valve ring. Line contact seals improve valve tightness; however, in practical use, beveled seal valve seats are more difficult to maintain. Once the valve seat sealing surface is damaged or corroded, the entire valve seat must be scrapped and cannot be repaired or used again. Utility Model Content

[0004] In view of this, the present invention provides a compressor valve with an embedded sealing seat to solve the technical problem that the existing valve seat with inclined surface sealing is difficult to maintain, and once the valve seat sealing surface is damaged or corroded, the entire valve seat can only be scrapped and cannot be repaired and used again.

[0005] This utility model provides a compressor valve with an embedded sealing seat, including a valve cover, a sealing element, and a valve seat. The valve cover and the valve seat are assembled as one unit. The sealing element is installed between the valve cover and the valve seat and can reciprocate in a direction away from or towards the valve seat to open or seal the gas flow passage of the valve seat. The valve seat includes a detachably connected base and a sealing seat, which are assembled as one unit to form the valve seat. The sealing element is installed between the valve cover and the sealing seat.

[0006] Optionally, the base has a sealing surface on the side facing the sealing element, and a seal is formed between the sealing seat and the sealing surface; both the base facing the sealing element and the sealing seat facing the sealing element are provided with multiple annular channels of different diameters, and the multiple annular channels are arranged concentrically with the center of the valve seat as the center. The annular channels on the base and the annular channels on the sealing seat are correspondingly arranged and connected to form the gas flow channel of the valve seat.

[0007] Optionally, the sealing element includes multiple valve rings of different diameters, which are arranged concentrically around the center of the valve seat and correspond to the annular groove on the sealing seat.

[0008] Optionally, multiple valve rings may be configured independently.

[0009] Optionally, the plurality of valve rings are flexibly connected by radially arranged connecting ribs.

[0010] Optionally, each annular groove on the sealing seat has a sealing bevel machined on its edge, and two opposite sealing bevels of the same annular groove form a funnel-shaped angle. Each valve ring has a sealing surface with an R-angle machined on its edge to form a linear seal with the sealing bevel.

[0011] Optionally, the sealing seat is made of a non-metallic material.

[0012] Optionally, the sealing seat is made of a metallic material.

[0013] Optionally, the sealing element is made of a non-metallic material.

[0014] Optionally, a closing spring is provided between the sealing element and the valve cover, the closing spring being used to apply a preload force to the sealing element to seal the gas flow channel.

[0015] The present invention has the following advantages: by designing the valve seat as a detachable base and sealing seat, the sealing seat can be replaced separately, thereby improving the repairability of the air valve. Simultaneously, the sealing seat can be made of non-metallic materials, improving the sealing performance of the air valve. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1This is a schematic diagram of the structure of an embodiment of the present utility model; The numbers in the image represent: 1. Valve cover; 2. Sealing element; 3. Valve seat; 31. Base; 32. Sealing seat; 4. Center bolt; 5. Locking nut; 6. Closing spring; 7. Spring cap. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] The following are preferred embodiments of this utility model: Taking a BOG reciprocating compressor in an LNG receiving terminal as an example, its rotational speed is typically above 495 rpm. The first-stage inlet pressure is 0.13 MPa(a), and the first-stage inlet temperature is -139℃; the second-stage inlet pressure is 0.35 MPa(a), and the second-stage inlet temperature is -76℃; the second-stage outlet pressure is 1.26 MPa(a), and the second-stage outlet temperature is 25℃. The gas valve is required to have the maximum flow area and the lowest gas velocity within a limited valve orifice size. To increase the flow area, a common solution is to use a set of annular valve plates (also known as valve rings) with arc-shaped seals as the sealing element of the gas valve, and the set of annular valve plates contains as many valve rings as possible. However, a large number of valve rings makes the valve seat sealing surface difficult to maintain; once the valve seat sealing surface is worn or damaged, on-site repair is impossible.

[0020] Therefore, embodiments of this utility model provide a compressor valve with an embedded sealing seat. Please refer to [link / reference]. Figure 1 As shown, the compressor valve includes a valve lift limiter (or valve cover 1), a sealing element 2, and a valve seat 3. The valve cover 1 and valve seat 3 are assembled together by a center bolt 4 and a lock nut 5. The sealing element 2 is installed between the valve cover 1 and the valve seat 3 and can reciprocate in a direction away from or towards the valve seat 3 to open or seal the gas flow passage of the valve seat 3. The valve seat 3 includes a base 31 and a sealing seat 32. The sealing seat 32 is detachably connected to the base 31 by fasteners such as pins and is assembled together with the base 31 to form a complete valve seat 3. The sealing seat 32 can be replaced separately, thereby improving the repairability of the valve.

[0021] In this embodiment, the base 31 has a sealing surface on the side facing the sealing element 2, and a seal is formed between the sealing seat 32 and the sealing surface (the outer edges of both are preferably flush), forming a complete valve seat 3. Both the side of the base 31 facing the sealing element 2 and the side of the sealing seat 32 facing the sealing element 2 are provided with multiple annular channels of different diameters. These multiple annular channels are concentrically arranged around the center of the valve seat 3. The annular channels on the base 31 and the annular channels on the sealing seat 32 are correspondingly arranged and connected, thereby forming the gas flow channel of the valve seat 3.

[0022] In this embodiment, the sealing seat 32 can be made of a non-metallic material to further improve the sealing performance of the valve; of course, the sealing seat 32 can also be made of a metallic material, and the material can be selected according to the actual sealing requirements. For reference, the thickness of the sealing seat 32 can be 6mm, 8mm or 10mm.

[0023] Furthermore, each annular groove on the sealing seat 32 has a sealing bevel machined on its edge. Two opposite sealing bevels on the same annular groove form a funnel-shaped angle, which can be 100°, 110°, 120°, 130°, 140°, 150° and other equivalent degrees.

[0024] The sealing element 2 is installed between the valve cover 1 and the sealing seat 32. In this embodiment, the sealing element 2 is made of a non-metallic material, and for reference, the thickness of the sealing element 2 can be 6mm, 8mm, or 10mm. The sealing element 2 includes multiple valve rings (also known as annular valve plates) of different diameters, which are concentrically arranged around the center of the valve seat 3 and correspond to the annular grooves on the sealing seat 32. The multiple valve rings can be set independently or flexibly connected by radially arranged connecting ribs.

[0025] Furthermore, each valve ring has a sealing surface with an R-angle corresponding to its edge. The radius of the R-angle can be R10, R15, R20, R25, or R30. The R-angle of the valve ring and the funnel-shaped sealing slope of the sealing seat 32 form a linear seal.

[0026] In this embodiment, a closing spring 6 is also provided between the sealing element 2 and the valve cover 1. The closing spring 6 can be a helical spring or a disc spring. One end of the closing spring 6 is located in the cavity of the valve cover 1, and the other end of the closing spring 6 is loaded onto the sealing element 2 through the spring cap 7 to apply a pre-tightening force to the sealing element 2 to seal the gas flow channel.

[0027] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this utility model. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A compressor valve with an embedded sealing seat, comprising a valve cover, a sealing element, and a valve seat, wherein the valve cover and the valve seat are integrally assembled, and the sealing element is installed between the valve cover and the valve seat and is capable of reciprocating in a direction away from or towards the valve seat to open or seal the gas flow passage of the valve seat, characterized in that: The valve seat includes a detachably connected base and a sealing seat, which are assembled as a single unit to form the valve seat; the sealing element is installed between the valve cover and the sealing seat.

2. A compressor valve with an embedded sealing seat according to claim 1, characterized in that: The base has a sealing surface on the side facing the sealing element, and a seal is formed between the sealing seat and the sealing surface. The base and the sealing seat are both provided with multiple annular channels of different diameters on the side facing the sealing element. The multiple annular channels are arranged concentrically with the center of the valve seat as the center. The annular channels on the base and the annular channels on the sealing seat are correspondingly arranged and connected to form the gas flow channel of the valve seat.

3. A compressor valve with an embedded sealing seat according to claim 2, characterized in that: The sealing element includes multiple valve rings of different diameters, which are arranged concentrically around the center of the valve seat and correspond to the annular groove on the sealing seat.

4. A compressor valve with an embedded sealing seat according to claim 3, characterized in that: Multiple valve rings are independently configured.

5. A compressor valve with an embedded sealing seat according to claim 3, characterized in that: The multiple valve rings are flexibly connected by radially arranged connecting ribs.

6. A compressor valve with an embedded sealing seat according to claim 3, characterized in that: Each annular groove on the sealing seat has a sealing bevel machined on its edge. Two opposite sealing bevels on the same annular groove form a funnel-shaped angle. Each valve ring has a sealing surface with an R-angle machined on its edge to form a linear seal with the sealing bevel.

7. A compressor valve with an embedded sealing seat according to claim 1, characterized in that: The sealing seat is made of non-metallic material.

8. A compressor valve with an embedded sealing seat according to claim 1, characterized in that: The sealing seat is made of metal.

9. A compressor valve with an embedded sealing seat according to claim 1, characterized in that: The sealing element is made of non-metallic material.

10. A compressor valve with an embedded sealing seat according to claim 1, characterized in that: A closing spring is provided between the sealing element and the valve cover. The closing spring is used to apply a preload force to the sealing element to seal the gas flow channel.

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