A high-pressure centrifugal compressor

Abstract

The present invention relates to the field of centrifugal compressors, specifically a high-pressure centrifugal compressor, including a high-pressure centrifugal compressor body, wherein an air intake pipe and an exhaust pipe are provided on the high-pressure centrifugal compressor body, the exhaust pipe and an external pipeline are connected by a connecting mechanism, and a detection mechanism is provided between the exhaust pipe and the external pipeline. Through the coordinated action of the tightening component of the connecting mechanism (the meshing transmission of the gear ring and the gear) and the spring energy storage structure, the exhaust pipe and the external pipeline can be quickly tightened and sealed by rotating the operating ring. Compared with the traditional flange connection, there is no need to operate the bolts one by one, which significantly improves the assembly efficiency. At the same time, the first spring provides continuous axial pressing force, which can dynamically compensate for the connection gap caused by vibration or temperature change, ensure that the sealing ring is always in a tightly fitting state, and effectively avoid the risk of air leakage.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal compressors, and in particular to a high-pressure centrifugal compressor. Background Art

[0002] As a key equipment for gas boosting and transportation, high-pressure centrifugal compressors convert the mechanical energy of the prime mover into pressure energy and kinetic energy of the gas through the high-speed rotation of the impeller. Heat exchangers are usually installed on each stage of the compressor unit of the high-pressure centrifugal compressor to recover waste heat and achieve efficient compression and transportation of the gas.

[0003] At present, in the actual use of compressors, the connection between the exhaust end and the external pipeline is an important link. The traditional connection method usually adopts flange connection and other structures. This connection method is not only very troublesome and has low connection efficiency, but also in the long-term operation process, due to the influence of factors such as vibration and pressure fluctuations, the connection is prone to loosening, which leads to a decrease in air tightness and gas leakage. Gas leakage will not only cause energy waste and affect production efficiency, but also may bring safety hazards.

[0004] Therefore, the present invention provides a high-pressure centrifugal compressor to solve the above problems. Summary of the Invention

[0005] In view of the above situation, in order to overcome the defects of the existing technology, the present invention provides a high-pressure centrifugal compressor to solve the problem that the existing technology easily causes the connection at the compressor exhaust end to loosen and the exhaust end leakage cannot be normally detected in the event of power outage or power failure.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A high-pressure centrifugal compressor comprises a high-pressure centrifugal compressor body, an air inlet pipe and an exhaust pipe are provided on the high-pressure centrifugal compressor body, the exhaust pipe and an external pipeline are connected via a connecting mechanism, and a detection mechanism is provided between the exhaust pipe and the external pipeline;

[0008] The connecting mechanism includes a first ring and a second ring, the first ring is fixedly connected to the outer surface of the exhaust pipe, and the second ring is fixedly connected to the outer surface of the external pipe. The first ring and the second ring are both installed with sealing rings that are close to each other on one side, and the two sealing rings are respectively close to one end of the exhaust pipe and the external pipe that are close to each other. Four pulling shafts are slidably installed inside the first ring, and a pulling plate is fixedly connected to one end of the pulling shaft. A long hole is opened inside the second ring for the pulling plate to pass through. A circular groove is opened inside the first ring, and a rotating tensioning assembly is provided inside the circular groove.

[0009] Preferably, the rotary tensioning assembly includes a gear ring and four gears, and the gear ring and the four gears are rotatably installed inside the circular groove, the gears are connected to the pulling shaft through a key, and the four gears are all engaged with the gear ring.

[0010] Preferably, an operating ring is sleeved on the outside of the exhaust pipe, and the ends of the four pulling shafts away from the pulling plate are all slidably connected to the inside of the operating ring.

[0011] Preferably, an arc block is fixedly connected to the inside of the circular groove, a T-shaped slot is opened inside the arc block, a T-shaped block is slidably connected to the inside of the T-shaped slot, a connecting rod is fixedly connected to the T-shaped block, and the other end of the connecting rod is fixedly connected to the operating ring.

[0012] Preferably, a rectangular groove for the T-shaped block to slide up and down is opened inside the arc-shaped block, and the rectangular groove is connected to the end of the T-shaped groove.

[0013] Preferably, a cylinder is fixedly connected to one side of the gear ring close to the operating ring, a first spring is fixedly connected to the inside of the cylinder, the other end of the first spring is fixedly connected to a round rod, the other end of the round rod slides through the cylinder and is fixedly connected to the operating ring.

[0014] Preferably, the detection mechanism includes a first semicircular cover and a second semicircular cover, the first semicircular cover and the second semicircular cover are arranged at the connection between the exhaust pipe and the external pipe, and the first semicircular cover and the second semicircular cover are fixedly connected on one side close to each other, the outer surface of the first semicircular cover is fixedly connected to the detection cylinder, the top of the detection cylinder is fixedly connected to the prompt cylinder, and the interior of the detection cylinder and the prompt cylinder are both provided with a first slide groove, and the two first slide grooves are concentric and connected.

[0015] Preferably, a first slide is slidably connected to the interior of the first slide groove, a counterweight block is integrally formed on the first slide, a prompt rod is fixedly connected to the upper surface of the first slide, and a round hole is provided on the top of the prompt tube for the prompt rod to pass through.

[0016] Preferably, the outer surface of the second semicircular cover is fixedly connected to the exhaust pipe, and the exhaust pipe and the second semicircular cover are both provided with a second slide groove, the two second slide grooves are concentric and connected, the interior of the second slide groove is slidably connected to the second slide plate, and the second slide plate is fixedly connected to a second spring on a side close to the exhaust pipe, and the other end of the second spring is fixedly connected to the inner wall of the exhaust pipe.

[0017] Preferably, an air leakage hole is opened inside the exhaust pipe.

[0018] The beneficial effects of the present invention are:

[0019] 1. Through the synergistic effect of the tensioning assembly of the connection mechanism (the meshing transmission between the gear ring and the gear) and the spring energy storage structure, the present invention can quickly tighten and seal the exhaust pipe and the external pipe by simply rotating the operating ring. Compared with traditional flange connections, there is no need to operate bolts one by one, which significantly improves assembly efficiency. At the same time, the first spring provides continuous axial compression force, which can dynamically compensate for the connection gap caused by vibration or temperature changes, ensuring that the sealing ring is always in a tight fit and effectively avoiding the risk of air leakage.

[0020] 2. The present invention provides a detection mechanism. When a leak occurs at the connection, the leaking gas pushes the counterweight block, which drives the prompt rod to rise and extend the prompt tube, providing a real-time warning in a visual manner (such as a colored prompt rod). This solves the problem of failure of traditional electrical detection components in a power-off environment. In addition, the pressure relief structure composed of the exhaust pipe and the second spring can automatically open the vent hole when the system pressure rises abnormally, preventing the risk of explosion due to excessive pressure, thereby further improving equipment safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a cross-sectional view of the detection mechanism of the present invention;

[0023] Figure 3 Schematic diagram of the first ring, the second ring and the connecting mechanism of the present invention;

[0024] Figure 4 This is a schematic diagram of the connection between the gear ring and the gear of the present invention;

[0025] Figure 5 This is a schematic diagram of the interior of the circular groove of the present invention;

[0026] Figure 6 This is a schematic diagram of the connection between the circular groove and the arc block of the present invention;

[0027] Figure 7 This is a schematic structural diagram of the T-shaped block and the connecting rod of the present invention;

[0028] Figure 8 This is a schematic structural diagram of the pull shaft, gear and pull plate of the present invention;

[0029] Figure 9 is a cross-sectional view of the cylinder of the present invention;

[0030] Figure 10 Schematic diagram of the detection mechanism of the present invention;

[0031] Figure 11 It is a cross-sectional view of the detection mechanism of the present invention.

[0032] In the figure: 1. High-pressure centrifugal compressor body; 2. Inlet pipe; 3. Exhaust pipe; 4. First circular ring; 5. Second circular ring; 6. Sealing ring; 7. Circular groove; 8. Gear ring; 9. Pull shaft; 10. Gear; 11. Pull plate; 12. Long strip hole; 13. Arc block; 14. T-shaped groove; 15. Rectangular groove; 16. T-shaped block; 17. Connecting rod; 18. Cylinder; 19. Circular rod; 20. First spring; 21. Operating ring; 22. Limiting ring; 23. First semicircular cover; 24. Second semicircular cover; 25. Detection cylinder; 26. Prompt cylinder; 27. First slide plate; 28. Prompt rod; 29. Exhaust pipe; 30. Second slide plate; 31. Air bleed hole; 32. Second spring. DETAILED DESCRIPTION

[0033] The following will describe various embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0034] like Figures 1-11 As shown, a high-pressure centrifugal compressor includes a high-pressure centrifugal compressor body 1, on which an air intake pipe 2 and an exhaust pipe 3 are provided. The exhaust pipe 3 and the external pipe are connected by a connecting mechanism. The connecting mechanism includes a first ring 4 and a second ring 5. The first ring 4 is fixedly connected to the outer surface of the exhaust pipe 3, and the second ring 5 is fixedly connected to the outer surface of the external pipe. The first ring 4 and the second ring 5 are both installed with sealing rings 6 that are tightly attached to each other on the sides close to each other, and the two sealing rings 6 are respectively tightly attached to the ends of the exhaust pipe 3 and the external pipe that are close to each other. The sealing ring 6 adopts a stepped lip structure and is made of high-temperature resistant silicone rubber. The direction of its lip is in the same direction as the gas pressure direction. It can be automatically tightened under the action of gas pressure to improve sealing reliability.

[0035] Four pulling shafts 9 are slidably installed inside the first circular ring 4, and one end of the pulling shaft 9 is fixedly connected to a pulling plate 11. A long strip hole 12 is provided inside the second circular ring 5 for the pulling plate 11 to pass through. A circular groove 7 is provided inside the first circular ring 4, and a rotary tensioning assembly is provided inside the circular groove 7. The rotary tensioning assembly includes a gear ring 8 and four gears 10, and the gear ring 8 and the four gears 10 are rotatably installed inside the circular groove 7. The gear 10 is connected to the pulling shaft 9 by a key, and the four gears 10 are all meshed with the gear ring 8. An operating ring 21 is provided on the outside of the exhaust pipe 3, and the ends of the four pulling shafts 9 away from the pulling plate 11 are all slidably connected to the inside of the operating ring 21. The pulling shaft 9 can slide along the gear 10, and the rotation of the gear 10 can drive the pulling shaft 9 to rotate. A boss ring is provided at one end of the pulling shaft 9 located inside the operating ring 21, and the operating ring 21 is correspondingly provided with an annular groove for installing the boss ring, so that the pulling shaft 9 will not move when the operating ring 21 rotates, and when the operating ring 21 moves horizontally, it will drive the pulling shaft 9 to move accordingly (refer to Figure 6and Figure 8 ), the gear 10 is rotatably connected to the first circular ring 4 through a limiting ring 22, the interior of the first circular ring 4 is provided with a limiting groove adapted to the limiting ring 22, the interior of the circular groove 7 is fixedly connected with an arc block 13, the interior of the arc block 13 is provided with a T-shaped groove 14, the interior of the T-shaped groove 14 is slidably connected with a T-shaped block 16, the T-shaped block 16 is fixedly connected with a connecting rod 17, the other end of the connecting rod 17 is fixedly connected to the operating ring 21, the interior of the arc block 13 is provided with a rectangular groove 15 for the T-shaped block 16 to slide up and down, and the rectangular groove 15 is connected to the end of the T-shaped groove 14, the gear ring 8 is fixedly connected to the side of the operating ring 21 with a cylinder 18, the interior of the cylinder 18 is fixedly connected with a first spring 20, the first spring 2 The other end of 0 is fixedly connected to a round rod 19, and the other end of the round rod 19 slides through the cylinder 18 and is fixedly connected to the operating ring 21. When the operating ring 21 rotates, the T-shaped block 16 first rotates circumferentially along the T-shaped groove 14, and when it rotates to the rectangular groove 15, under the elastic force of the first spring 20, the T-shaped block 16 drives the operating ring 21 to slide axially along the rectangular groove 15, and then pulls the pull plate 11 through the pull shaft 9, so that the second ring 5 presses the first ring 4, realizing dynamic compression of the sealing ring 6. Due to the rotational cooperation between the limit ring 22 and the limit groove, it is ensured that the gear 10 and the gear ring 8 remain engaged during the rotation process. At the same time, the energy storage characteristics of the first spring 20 are used to continuously provide axial compression force to offset the loosening trend caused by vibration.

[0036] A detection mechanism is provided between the exhaust pipe 3 and the external pipe. The detection mechanism can completely cover the connecting mechanism, and there is a gap for gas circulation between the connecting mechanism and the detection mechanism. The detection mechanism includes a first semicircular cover 23 and a second semicircular cover 24. The first semicircular cover 23 and the second semicircular cover 24 are provided at the connection between the exhaust pipe 3 and the external pipe, and the first semicircular cover 23 and the second semicircular cover 24 are fixedly connected on one side close to each other. The outer surface of the first semicircular cover 23 is fixedly connected to a detection cylinder 25, and the top of the detection cylinder 25 is fixedly connected to a prompt cylinder 26, and the interiors of the detection cylinder 25 and the prompt cylinder 26 are both provided with a first slide groove, the two first slide grooves are concentric and connected, the interior of the first slide groove is slidably connected to a first slide plate 27, the first slide plate 27 is integrally formed with a counterweight block, and the upper surface of the first slide plate 27 is fixedly connected to a prompt rod 28, and the top of the prompt cylinder 26 is provided with a circular hole for the prompt rod 28 to pass through. The top of the prompt rod 28 is provided with a spherical end, and the surface is coated with a fluorescent warning coating.

[0037] The outer surface of the second semicircular cover 24 is fixedly connected to the exhaust pipe 29, and a second sliding groove is provided inside the exhaust pipe 29 and the second semicircular cover 24. The two second sliding grooves are concentric and connected. A second slide plate 30 is slidably connected inside the second sliding groove. A second spring 32 is fixedly connected to the side of the second slide plate close to the exhaust pipe 29. The other end of the second spring 32 is fixedly connected to the inner wall of the exhaust pipe 29. An air leakage hole 31 is provided inside the exhaust pipe 29.

[0038] Working principle:

[0039] Initial state:

[0040] The pull plate 11 is axially aligned with the long hole 12, the T-shaped block 16 is located at the starting end of the T-shaped slot 14, and the first spring 20 is in a compressed state, but is limited by the obstruction of the arc block 13 and cannot push the operating ring 21 to slide outward. The first slide 27 of the detection mechanism is located at the bottom of the detection tube 25 under the action of the gravity of the counterweight block, the prompt rod 28 is completely retracted into the prompt tube 26, and the second slide 30 closes the air leak hole 31 under the action of the second spring 32.

[0041] Connection process:

[0042] Push the outer pipe axially until it is pressed against the exhaust pipe 3, aligning the first ring 4 with the second ring 5. The pull plate 11 passes through the long hole 12. At this time, it is aligned, so it can pass through easily. Then rotate the operating ring 21 clockwise. The operating ring 21 drives the gear ring 8 to rotate through the connection between the cylinder 18 and the round rod 19. The rotation of the gear ring 8 can drive the four gears 10 to rotate 90° each (the gear 10 will rotate 90° only when the operating ring 21 is rotated to the maximum extent). The gear 10 can drive the pull shaft 9 and the pull plate 11 to rotate. At this time, the pull plate 1 1 is vertically staggered with the long strip hole 12. At the same time, the rotation of the operating ring 21 can drive the T-shaped block 16 to slide along the T-shaped groove 14 through the connecting rod 17. When the T-shaped block 16 rotates to the rectangular groove 15, the arc block 13 will no longer block the T-shaped block 16. Then the elastic force of the first spring 20 pushes the round rod 19, driving the operating ring 21, the pulling shaft 9 and the pulling plate 11 to move axially. The end of the pulling plate 11 hooks the second circular ring 5 and pulls the second circular ring 5 tightly toward the first circular ring 4, so that the two sealing rings 6 are compressed and deformed, forming a high-pressure seal.

[0043] When disassembling, press the operating ring 21 inward to the maximum extent, and then rotate the operating ring 21 in the opposite direction to the initial position. The T-slot 14 will block the T-block 16. At this time, the pull plate 11 and the long hole 12 are rotated to be flush, and then can be directly removed.

[0044] When leakage occurs due to loose connections or wear of the sealing ring 6, the leaking gas enters the enclosed detection chamber formed by the first and second semicircular covers 23 and 24. The thrust of the gas overcomes the weight of the counterweight of the first slide 27, pushing it up along the first chute. The warning rod 28 then extends out of the circular hole at the top of the warning tube 26, with the red warning end exposed, alerting the operator to prompt maintenance.

[0045] If a sudden large-scale leakage or system overpressure occurs, the pressure in the detection chamber rises sharply in a short period of time, the gas pressure overcomes the preload force of the second spring 32, pushes the second slide 30 open, and the high-pressure gas is discharged to the external safe area through the bleed hole 31, preventing the detection mechanism from bursting due to excessive pressure. After the pressure is released, the second spring 32 resets, pushing the second slide 30 to re-close the bleed hole 31 to maintain normal detection function.

[0046] It should be noted that in the description of the present invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and are not intended to indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0048] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A high-pressure centrifugal compressor, comprising a high-pressure centrifugal compressor body (1), characterized in that: An air intake pipe (2) and an exhaust pipe (3) are provided on the high-pressure centrifugal compressor body (1); the exhaust pipe (3) and an external pipeline are connected via a connecting mechanism; and a detection mechanism is provided between the exhaust pipe (3) and the external pipeline; The connecting mechanism includes a first circular ring (4) and a second circular ring (5), wherein the first circular ring (4) is fixedly connected to the outer surface of the exhaust pipe (3), and the second circular ring (5) is fixedly connected to the outer surface of the external pipe. The first circular ring (4) and the second circular ring (5) are both provided with sealing rings (6) that are close to each other on their respective sides, and the two sealing rings (6) are respectively close to the ends of the exhaust pipe (3) and the external pipe that are close to each other. Four pulling shafts (9) are slidably installed inside the first circular ring (4), and one end of the pulling shaft (9) is fixedly connected to a pulling plate (11). The interior of the second circular ring (5) is provided with a long strip hole (12) for the pulling plate (11) to pass through. The interior of the first circular ring (4) is provided with a circular groove (7), and the interior of the circular groove (7) is provided with a rotating tensioning component. The rotary tensioning assembly comprises a gear ring (8) and four gears (10), and the gear ring (8) and the four gears (10) are rotatably mounted inside the circular groove (7), the gears (10) and the tensioning shaft (9) are connected via a key, and the four gears (10) are all meshed with the gear ring (8); An operating ring (21) is sleeved on the outside of the exhaust pipe (3), and the ends of the four pulling shafts (9) away from the pulling plate (11) are all slidably connected to the inside of the operating ring (21); The circular groove (7) is fixedly connected to an arc block (13), a T-shaped groove (14) is provided inside the arc block (13), a T-shaped block (16) is slidably connected inside the T-shaped groove (14), a connecting rod (17) is fixedly connected to the T-shaped block (16), and the other end of the connecting rod (17) is fixedly connected to the operating ring (21); A rectangular groove (15) is provided inside the arc block (13) for the T-shaped block (16) to slide up and down, and the rectangular groove (15) is connected to the end of the T-shaped groove (14); A cylinder (18) is fixedly connected to one side of the gear ring (8) close to the operating ring (21), a first spring (20) is fixedly connected to the inside of the cylinder (18), the other end of the first spring (20) is fixedly connected to a round rod (19), and the other end of the round rod (19) slides through the cylinder (18) and is fixedly connected to the operating ring (21).

2. A high-pressure centrifugal compressor according to claim 1, characterized in that: The detection mechanism comprises a first semicircular cover (23) and a second semicircular cover (24), the first semicircular cover (23) and the second semicircular cover (24) being arranged at the connection between the exhaust pipe (3) and the external pipe, and the first semicircular cover (23) and the second semicircular cover (24) being fixedly connected on their respective sides close to each other, the outer surface of the first semicircular cover (23) being fixedly connected to a detection cylinder (25), the top of the detection cylinder (25) being fixedly connected to a prompt cylinder (26), and the interiors of the detection cylinder (25) and the prompt cylinder (26) both being provided with a first chute, and the two first chute are concentric and connected.

3. A high-pressure centrifugal compressor according to claim 2, characterized in that: A first slide plate (27) is slidably connected to the interior of the first slide groove, a counterweight block is integrally formed on the first slide plate (27), a prompt rod (28) is fixedly connected to the upper surface of the first slide plate (27), and a circular hole for the prompt rod (28) to pass through is opened on the top of the prompt tube (26).

4. A high-pressure centrifugal compressor according to claim 3, characterized in that: The outer surface of the second semicircular cover (24) is fixedly connected to the exhaust pipe (29), and the interior of the exhaust pipe (29) and the second semicircular cover (24) are both provided with a second slide groove, the two second slide grooves are concentric and connected, and the interior of the second slide groove is slidably connected to a second slide plate (30), and a second spring (32) is fixedly connected to a side of the second slide plate (30) close to the exhaust pipe (29), and the other end of the second spring (32) is fixedly connected to the inner wall of the exhaust pipe (29).

5. A high-pressure centrifugal compressor according to claim 4, characterized in that: An air leakage hole (31) is provided inside the exhaust cylinder (29).

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