Multi-stage compressor piping structure in series

Abstract

The application discloses a pipeline structure for multistage compressor series connection, which comprises a first pipe body and a second pipe body connected with each other, a first cavity, a second cavity and a third cavity are sequentially arranged in the first pipe body along the length direction, the cross-sectional dimension of the second cavity is smaller than that of the third cavity; a fourth cavity and a fifth cavity are sequentially arranged in the second pipe body along the length direction, the cross-sectional dimension of the fourth cavity is smaller than that of the third cavity; a valve body is slidably arranged in the third cavity, the length of the valve body is smaller than the depth of the third cavity, and a flow channel communicating with the third cavity and the fourth cavity is arranged in the valve body. The application can automatically increase the pressure of the gas when the pressure of the gas is small, and can automatically make part of the gas directly jump over the pressure increasing stage when the pressure of the gas is large, which is beneficial to optimizing the load distribution and effectively improving the pressure increasing efficiency and the cycle transfer efficiency of the multistage compressor.

Description

Technical Field

[0001] This invention belongs to the field of compressor technology, and particularly relates to a pipeline structure for a multi-stage compressor in series. Background Technology

[0002] In industrial production, multiple compression chambers or multiple compressors operating in series are a common method for obtaining high-pressure gas. Currently, the most common connection method between two adjacent compression chambers or compressors is to directly connect the outlet of the lower-level compression chamber to the inlet of the higher-level compression chamber through a pipeline. However, when the gas flow rate is very high, this connection method poses a risk of overloading the higher-level compressor, which can easily lead to abnormal heating, alarm shutdown, or even damage to the compression chamber. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, this invention provides a piping structure for multi-stage compressors in series, which can optimize the load distribution of multi-stage compressors.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A piping structure for a multi-stage compressor in series includes:

[0006] The first tube body has a first cavity, a second cavity and a third cavity arranged sequentially along its length. The cross-sectional dimension of the second cavity is smaller than that of the third cavity. The side wall of the first cavity near the second cavity is provided with an air outlet for communicating with the air inlet of a compressor. The end of the first cavity away from the second cavity is used to communicate with the air outlet of the previous stage compressor.

[0007] The second tube is fixedly connected to the first tube. The second tube contains a fourth cavity and a fifth cavity arranged sequentially along its length. The cross-sectional dimension of the fourth cavity is smaller than that of the third cavity. The fifth cavity has an air inlet on its side wall away from the fourth cavity for connecting to the air outlet of a compressor. The fifth cavity is also connected to the air inlet of the next stage compressor at its end away from the fourth cavity.

[0008] The valve body is slidably disposed in the third cavity. The length of the valve body is less than the depth of the third cavity. The valve body is provided with a flow channel that communicates with the third cavity and the fourth cavity.

[0009] In one embodiment, the flow channel includes a vertical hole and several transverse holes communicating with the vertical hole. The valve body is provided with a vertical hole at one end near the fourth cavity, and several transverse holes are provided on the side of the valve body.

[0010] The beneficial effects of adopting the above technical solution are as follows: the vertical hole and the horizontal hole can connect the fourth cavity and the third cavity respectively, thereby connecting the flow channel to the third cavity and the fourth cavity.

[0011] In one embodiment, the position and size of the vertical hole are matched with the position and size of the fourth cavity, respectively.

[0012] The beneficial effects of adopting the above technical solution are as follows: the position and size of the vertical hole are matched with the position and size of the fourth cavity, so that the gas entering the vertical hole can enter the fourth cavity without obstruction, thereby reducing energy loss during gas flow.

[0013] In one embodiment, the valve body is a polygonal prism.

[0014] The beneficial effects of adopting the above technical solution are as follows: the valve body is a multi-faceted prism, that is, the valve body relies on its side edges to contact the side wall of the third cavity. The side wall of the third cavity restricts the position of the valve body and can ensure that there is a large gap between the side of the valve body and the side wall of the third cavity to facilitate gas flow.

[0015] In one embodiment, the piping structure for multi-stage compressors in series further includes a third pipe body, the two ends of which are respectively connected to the air outlet and the airflow inlet of the compressor.

[0016] The beneficial effects of adopting the above technical solution are: the gas discharged from the outlet can be discharged to the airflow inlet of the compressor through the third pipe.

[0017] In one embodiment, the piping structure for multi-stage compressors in series further includes a fourth pipe body, the two ends of which are respectively connected to the air inlet and the air outlet of the compressor.

[0018] The beneficial effect of adopting the above technical solution is that the gas discharged from the compressor's air outlet can be discharged to the air inlet through the fourth pipe.

[0019] In one embodiment, the cross-sectional dimension of the fourth cavity is smaller than that of the fifth cavity.

[0020] The beneficial effects of adopting the above technical solution are as follows: the cross-sectional size of the fourth cavity is smaller than that of the fifth cavity, so as to avoid the step formed by the fourth and fifth cavities from blocking the flow of gas, thereby reducing energy loss during the gas flow process; at the same time, the fifth cavity is larger, which is conducive to reducing the gas flow resistance.

[0021] In one embodiment, a first connecting portion and a second connecting portion are respectively provided at one end of the first tube and the second tube that are close to each other, and the first connecting portion and the second connecting portion are detachably connected.

[0022] The beneficial effects of adopting the above technical solution are: the first connecting part and the second connecting part can be detachably connected to make the first tube body and the second tube body fixedly connected.

[0023] In one embodiment, a sealing ring is provided between the first connecting part and the second connecting part, and the sealing ring is located on the outside of the third cavity.

[0024] The beneficial effects of adopting the above technical solution are as follows: the sealing ring can seal the gap between the first connecting part and the second connecting part to prevent gas from leaking from the gap between the first connecting part and the second connecting part.

[0025] In one embodiment, a third connecting portion is provided at the end of the first tube body away from the second tube body; and / or

[0026] A fourth connecting part is provided at the end of the second tube that is away from the first tube.

[0027] The beneficial effects of adopting the above technical solution are as follows: the first pipe body can be connected to a pipe body by the third connecting part, and communicate with the airflow outlet of the previous stage compressor through the pipe body, or be connected to the fourth connecting part of the multi-stage compressor series pipeline structure at the previous stage compressor through the pipe body; in addition, the second pipe body can be connected to a pipe body by the fourth connecting part, and be connected to the third connecting part of the multi-stage compressor series pipeline structure at the next stage compressor through the pipe body.

[0028] The beneficial effects of this invention are as follows:

[0029] After the gas discharged from the previous stage compressor enters the first chamber, part of it enters the compressor through the outlet and, after being pressurized, enters the fifth chamber through the inlet. The other part can enter the fifth chamber sequentially through the second chamber, the third chamber, the flow channel, and the fourth chamber, depending on the pressure in the first and fifth chambers. This allows the gas to be pressurized automatically when the gas pressure is low, and to skip this pressurization stage when the gas pressure is high. This is beneficial for optimizing load distribution and effectively improving the pressurization efficiency and circulation transfer efficiency of the multi-stage compressor. Attached Figure Description

[0030] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0031] Figure 1 A schematic diagram of an embodiment of the present invention is shown;

[0032] Figure 2 A schematic diagram of the structure of the first tube in this invention is shown;

[0033] Figure 3 A schematic diagram of the structure of the second tube in this invention is shown;

[0034] Figure 4 A schematic diagram of the valve body in this invention is shown;

[0035] Figure 5 An installation diagram of the present invention is shown;

[0036] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0037] Figure label:

[0038] 1-Compressor, 2-First tube body, 201-First cavity, 202-Outlet, 203-Second cavity, 204-Third cavity, 205-First connecting part, 206-Annular groove, 207-Third connecting part, 3-Second tube body, 301-Fourth cavity, 302-Fifth cavity, 303-Inlet, 304-Second connecting part, 305-Fourth connecting part, 4-Valve body, 401-Horizontal hole, 402-Vertical hole, 403-Blind hole, 5-Third tube body, 6-Fourth tube body, 7-Sealing ring, 8-Fifth tube body, 9-Sixth tube body. Detailed Implementation

[0039] The invention will now be further described with reference to the accompanying drawings.

[0040] This invention provides a piping structure for a multi-stage compressor in series, such as... Figure 1-4 As shown, it includes:

[0041] The first tube 2 has a first cavity 201, a second cavity 203 and a third cavity 204 arranged sequentially along its length. The cross-sectional dimension of the second cavity 203 is smaller than that of the third cavity 204. The side wall of the first cavity 201 near the second cavity 203 is provided with an air outlet 202 for communicating with the air inlet of a compressor 1. The end of the first cavity 201 away from the second cavity 203 is used to communicate with the air outlet of the previous stage compressor 1.

[0042] The second tube 3 is fixedly connected to the first tube 2. The second tube 3 has a fourth cavity 301 and a fifth cavity 302 arranged sequentially along its length. The cross-sectional dimension of the fourth cavity 301 is smaller than that of the third cavity 204. The side wall of the fifth cavity 302 away from the fourth cavity 301 is provided with an air inlet 303 for communicating with the air outlet of a compressor 1. The end of the fifth cavity 302 away from the fourth cavity 301 is used to communicate with the air inlet of the next stage compressor 1.

[0043] Valve body 4 is slidably disposed in the third cavity 204. The length of valve body 4 is less than the depth of the third cavity 204. A flow channel communicating with the third cavity 204 and the fourth cavity 301 is provided inside valve body 4.

[0044] It is understandable that after the gas discharged from the previous stage compressor 1 enters the first chamber 201, part of it enters the compressor 1 through the outlet 202 and, after being pressurized, enters the fifth chamber 302 through the inlet 303. The other part can enter the fifth chamber 302 in sequence through the second chamber 203, the third chamber 204, the flow channel, and the fourth chamber 301, depending on the pressure in the first chamber 201 and the fifth chamber 302. Thus, when the gas pressure is low, it can automatically pressurize the gas, and when the gas pressure is high, it can automatically allow some gas to skip this stage of pressurization. This is beneficial for optimizing load distribution and effectively improving the pressurization efficiency and circulation transfer efficiency of the multi-stage compressor 1.

[0045] It should be noted that the pipeline structure for this multi-stage compressor series connection is simple. When optimizing the load distribution of multiple series compressors 1, it does not require additional special valves, sensing devices or drive devices, which helps to reduce construction costs. In addition, it has fewer components, is easy to use and requires no later maintenance.

[0046] It should also be noted that when the gas pressure discharged into the first chamber 201 is relatively high, the pressure at the end of valve body 4 near the fifth chamber 302 is less than the pressure at the end of valve body 4 near the first chamber 201. Under the action of the pressure difference, valve body 4 slides along the third chamber 204 towards the fourth chamber 301, so that the second chamber 203, the third chamber 204, the flow channel and the fourth chamber 301 are connected in sequence, and a part of the gas directly enters the fifth chamber 302 from the first chamber 201. When the gas pressure discharged into the first chamber 201 is relatively low, the pressure at the end of valve body 4 near the fifth chamber 302 is not less than the pressure at the end of valve body 4 near the first chamber 201. The stepped structure formed by the second chamber 203 and the third chamber 204 restricts valve body 4 to prevent valve body 4 from sliding along the third chamber 204 towards the second chamber 203, so that all the gas enters the compressor 1 for pressurization.

[0047] It should also be noted that the cross-sectional shape of the first cavity 201, the second cavity 203, the third cavity 204, the fourth cavity 301 and the fifth cavity 302 are all circular, and the axes of the first cavity 201, the second cavity 203, the third cavity 204, the fourth cavity 301 and the fifth cavity 302 are all coincident.

[0048] In one embodiment, such as Figure 4 As shown, the flow channel includes a vertical hole 402 and several transverse holes 401 communicating with the vertical hole 402. The valve body 4 is provided with a vertical hole 402 at one end near the fourth cavity 301, and several transverse holes 401 are provided on the side of the valve body 4.

[0049] It is understandable that the vertical hole 402 and the horizontal hole 401 can be connected to the fourth cavity 301 and the third cavity 204 respectively, thereby connecting the flow channel to the third cavity 204 and the fourth cavity 301.

[0050] It should be noted that a blind hole 403 is provided at one end of the valve body 4 near the second cavity 203, and the end face of this end forms a partial sealing surface with the bottom surface of the third cavity 204.

[0051] In one embodiment, the position and size of the vertical hole 402 are matched with the position and size of the fourth cavity 301.

[0052] It is understandable that the position and size of the vertical hole 402 are matched with the position and size of the fourth cavity 301, so that the gas entering the vertical hole 402 can enter the fourth cavity 301 without obstruction, thereby reducing energy loss during gas flow.

[0053] In one embodiment, the valve body 4 is a quadrangular prism.

[0054] It is understandable that the valve body 4 is a quadrangular prism, that is, the valve body 4 contacts the side wall of the third cavity 204 by relying on its side edge. The side wall of the third cavity 204 restricts the position of the valve body 4 and ensures that there is a large gap between the side of the valve body 4 and the side wall of the third cavity 204 to facilitate gas flow.

[0055] It should be noted that the valve body 4 can be made of organic materials such as polyimide, which have relatively stable chemical properties, a certain degree of elasticity, and good processability.

[0056] Preferably, the valve body 4 is a regular square prism, each side edge of the valve body 4 contacts the side wall of the third cavity 204, and the diameter of the second cavity 203 can be the diameter of the inscribed circle of the outer contour of the cross-section of the valve body 4, so that the diameter of the second cavity 203 is as large as possible and the gap between the valve body 4 and the third cavity 204 is as large as possible.

[0057] In one embodiment, the pipeline structure for multi-stage compressors in series further includes a third pipe body 5, with the two ends of the third pipe body 5 connected to the air outlet 202 and the airflow inlet of the compressor 1, respectively.

[0058] It is understandable that the gas discharged from the outlet 202 can be discharged to the airflow inlet of the compressor 1 through the third pipe 5.

[0059] It should be noted that the two ends of the third tube 5 are connected to the air outlet 202 and the air inlet of the compressor 1 respectively by means of detachable connection.

[0060] In one embodiment, the pipeline structure for multi-stage compressors in series further includes a fourth pipe body 6, the two ends of which are respectively connected to the air inlet 303 and the air outlet of the compressor 1.

[0061] It is understandable that the gas discharged from the air outlet of compressor 1 can be discharged to the air inlet 303 through the fourth pipe 6.

[0062] It should be noted that the two ends of the fourth tube 6 are connected to the air inlet 303 and the air outlet of the compressor 1 respectively by means of detachable connection.

[0063] In one embodiment, the cross-sectional dimension of the fourth cavity 301 is smaller than the cross-sectional dimension of the fifth cavity 302.

[0064] It is understandable that the cross-sectional dimension of the fourth cavity 301 is smaller than that of the fifth cavity 302, so as to avoid the step formed by the fourth cavity 301 and the fifth cavity 302 from blocking the flow of gas, thereby reducing energy loss during the gas flow process; at the same time, the fifth cavity 302 is larger, which is beneficial to reducing the gas flow resistance.

[0065] In one embodiment, such as Figure 2 and Figure 3 As shown, the first tube 2 and the second tube 3 are respectively provided with a first connecting part 205 and a second connecting part 304 at their respective ends that are close to each other, and the first connecting part 205 and the second connecting part 304 are detachably connected.

[0066] It is understandable that the first connecting part 205 and the second connecting part 304 can be detachably connected to fix the first tube body 2 and the second tube body 3.

[0067] It should be noted that both the first connecting part 205 and the second connecting part 304 are flange structures, and the first connecting part 205 and the second connecting part 304 are connected by bolts.

[0068] In one embodiment, a sealing ring 7 is provided between the first connecting portion 205 and the second connecting portion 304, and the sealing ring 7 is located on the outside of the third cavity 204.

[0069] It is understood that the sealing ring 7 can seal the gap between the first connecting part 205 and the second connecting part 304 to prevent gas from leaking from the gap between the first connecting part 205 and the second connecting part 304.

[0070] It should be noted that an annular groove 206 is provided on the outer side of the third cavity 204, which is used to install the sealing ring 7.

[0071] In one embodiment, such as Figure 2 and Figure 3 As shown, a third connecting part 207 is provided at the end of the first tube body 2 away from the second tube body 3; a fourth connecting part 305 is provided at the end of the second tube body 3 away from the first tube body 2.

[0072] It is understandable that, such as Figure 5 As shown, the first tube 2 can be connected to a fifth tube 8 via the third connecting part 207, and communicate with the airflow outlet of the previous stage compressor 1 through the fifth tube 8, or it can be connected to a sixth tube 9 via the third connecting part 207, and communicate with the fourth connecting part 305 of the multi-stage compressor series pipeline structure of the previous stage compressor 1 through the sixth tube 9; in addition, the second tube 3 can be connected to the sixth tube 9 via the fourth connecting part 305, and communicate with the third connecting part 207 of the multi-stage compressor series pipeline structure of the next stage compressor 1 through the sixth tube 9.

[0073] Specifically, the air outlet of the primary compressor is connected to the third connection part 207 of the multi-stage compressor series pipeline structure at the secondary compressor via the third pipe body 5. The fourth connection part 305 of the multi-stage compressor series pipeline structure at the secondary compressor is connected to the third connection part 207 of the multi-stage compressor series pipeline structure at the tertiary compressor via the third connection part 305. Furthermore, each subsequent compressor is connected to the third connection part 207 of the next stage compressor via the fourth connection part 305.

[0074] It should also be noted that both the third connecting part 207 and the fourth connecting part 305 can be flange structures.

[0075] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0076] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A piping structure for a multi-stage compressor in series, used for a series compressor (1), characterized in that, include: The first tube (2) has a first cavity (201), a second cavity (203) and a third cavity (204) arranged sequentially along its length. The cross-sectional dimension of the second cavity (203) is smaller than that of the third cavity (204). The first cavity (201) has an outlet (202) on its side wall near the second cavity (203) for communicating with the airflow inlet of a compressor (1). The first cavity (201) is connected to the airflow outlet of the compressor (1) at the end away from the second cavity (203). The second tube (3) is fixedly connected to the first tube (2). The second tube (3) is provided with a fourth cavity (301) and a fifth cavity (302) in sequence along the length direction. The cross-sectional dimension of the fourth cavity (301) is smaller than that of the third cavity (204). The fifth cavity (302) has an air inlet (303) on the side wall away from the fourth cavity (301) for communicating with the air outlet of one of the compressors (1). The end of the fifth cavity (302) away from the fourth cavity (301) is used to communicate with the air inlet of the next stage compressor (1). The valve body (4) is slidably disposed in the third cavity (204). The length of the valve body (4) is less than the depth of the third cavity (204). The valve body (4) is provided with a flow channel communicating with the third cavity (204) and the fourth cavity (301).

2. The piping structure for a multi-stage compressor in series according to claim 1, characterized in that, The flow channel includes a vertical hole (402) and a plurality of transverse holes (401) communicating with the vertical hole (402). The valve body (4) is provided with the vertical hole (402) at one end near the fourth cavity (301), and the valve body (4) is provided with a plurality of transverse holes (401) on its side.

3. The piping structure for a multi-stage compressor in series according to claim 2, characterized in that, The position and size of the vertical hole (402) are respectively matched with the position and size of the fourth cavity (301).

4. The piping structure for a multi-stage compressor in series according to claim 2, characterized in that, The valve body (4) is a polygonal prism.

5. The piping structure for a multi-stage compressor in series according to claim 1, characterized in that, It also includes a third tube (5), the two ends of which are connected to the air outlet (202) and the airflow inlet of the compressor (1), respectively.

6. The piping structure for a multi-stage compressor in series according to claim 1, characterized in that, It also includes a fourth tube (6), the two ends of which are connected to the air inlet (303) and the air outlet of the compressor (1), respectively.

7. The piping structure for a multi-stage compressor in series according to claim 1, characterized in that, The cross-sectional dimension of the fourth cavity (301) is smaller than that of the fifth cavity (302).

8. The piping structure for a multi-stage compressor in series according to claim 1, characterized in that, The first tube (2) and the second tube (3) are respectively provided with a first connecting part (205) and a second connecting part (304) at their respective ends close to each other, and the first connecting part (205) and the second connecting part (304) are detachably connected.

9. The piping structure for a multi-stage compressor in series according to claim 8, characterized in that, A sealing ring (7) is provided between the first connecting part (205) and the second connecting part (304), and the sealing ring (7) is located on the outside of the third cavity (204).

10. The piping structure for a multi-stage compressor in series according to claim 1, characterized in that, The first tube (2) has a third connecting part (207) at the end away from the second tube (3); and / or The second tube (3) is provided with a fourth connecting part (305) at the end away from the first tube (2).

Images