Combined high-temperature and high-pressure centrifugal compressor

Abstract

The invention belongs to the technical field of compressors, and particularly relates to a combined high-temperature and high-pressure centrifugal compressor which comprises a bottom shell, a top shell is mounted at the top end of the bottom shell, an output pipe is fixed to one side of the top end of the top shell, an input pipe is fixed to the other side of the top end of the top shell, and a plurality of rotating cavities are formed in the bottom shell and the top shell correspondingly; the rotating cavities are communicated through a connecting cavity, the output pipe and the input pipe are communicated with the rotating cavity in the top shell, a transmission shaft is rotationally connected to the middles of the multiple rotating cavities, and centrifugal wheels are rotationally connected to the interiors of the rotating cavities; a top outer shell and a top metal net are arranged in the top shell, and a heat insulation layer is also arranged between the top outer shell and the top metal net; the heat insulation layer can be fixed between the top outer shell and the top metal net by arranging the top outer shell and the top metal net, so that the strength of the heat insulation layer is enhanced, the top outer shell and the top metal net are stressed in the mounting process, the structural strength is high, mounting is convenient, and the stability is higher in the using process.

Description

Technical Field

[0001] This invention belongs to the field of compressor technology, specifically a combined high-temperature and high-pressure centrifugal compressor. Background Technology

[0002] High-temperature and high-pressure centrifugal compressors are a special type of centrifugal compressor, mainly used for gas compression under high temperature and high pressure conditions. They are used in the petrochemical industry for ethylene production, in the energy and power industry for gas turbines, and in the waste heat recovery industry for recovering industrial waste heat.

[0003] A Chinese patent with publication number CN207420900U discloses a multi-stage centrifugal compressor and a centrifugal compressor unit. The multi-stage centrifugal compressor includes: a housing, which is sleeved on a main shaft; multiple impellers are provided inside the housing, and the multiple impellers are respectively matched with multiple partitions; the multiple impellers and multiple partitions are installed on the main shaft at intervals; multiple bushings are provided on the main shaft, and the multiple bushings are respectively arranged at intervals with the impellers. This invention alleviates the technical problem of non-smooth flow channels and frictional losses in the flow channels of existing centrifugal compressors.

[0004] During use, the gas retains a significant amount of heat through the internal channels. This heat is then transferred into the machine body, which then dissipates the heat to the outside. This results in a continuous loss of temperature in the transported gas, causing the temperature of the transported gas to fall short of the required level and affecting the stability of the transport process.

[0005] Therefore, the present invention provides a combined high-temperature and high-pressure centrifugal compressor. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a combined high temperature and high pressure centrifugal compressor, including a bottom shell, a top shell installed at the top of the bottom shell, an output pipe fixed on one side of the top of the top shell, an input pipe fixed on the other side of the top of the top shell, multiple rotating cavities are opened inside the bottom shell and the rotating cavities are connected to each other through connecting cavities, the output pipe and the input pipe are connected to the rotating cavities inside the top shell, a drive shaft is rotatably connected to the middle of the multiple rotating cavities, centrifugal wheels are rotatably connected inside the rotating cavities, and the drive shaft is fixedly connected to the middle of the multiple centrifugal wheels; The bottom shell has a bottom outer shell inside, and a bottom metal mesh inside the bottom outer shell. A heat insulation layer is provided between the bottom outer shell and the bottom metal mesh. The bottom outer shell and the bottom metal mesh are fixed together by a connecting structure. The top shell has a pair of top outer shells and top metal mesh inside, and a heat insulation layer is also provided between the top outer shells and the top metal mesh. The top outer shells and the top metal mesh are also fixed together by a connecting structure. The bottom and top metal meshes are shaped to match the internal shapes of the bottom and top shells, allowing them to adhere to the inner surfaces of the bottom and top shells.

[0008] Preferably, the connection structure includes multiple connecting rods fixed to the outside of the bottom outer shell and the top outer shell, and fixing nails penetrating the bottom metal mesh and the inner side of the bottom metal mesh. One end of the fixing nail is inserted into the interior of the connecting rod, and the other end of the fixing nail is fixed to a fixing plate. The fixing nail penetrates the interior of the heat insulation layer.

[0009] Preferably, both the bottom and top metal meshes have placement grooves on their inner sides, and the fixing plate can be inserted into the placement grooves. When the fixing plate is inserted into the placement slot, the surface of the fixing plate is flush with the inner side of the top metal mesh.

[0010] Preferably, the fixing pin has a slot on its outside and a protrusion on its inside, so that the protrusion engages with the slot when the fixing pin is inserted into the inside of the connecting rod.

[0011] Preferably, a telescopic rod is slidably connected inside the connecting rod, and a water storage cavity is opened inside the connecting rod. Water is placed inside the water storage cavity. The end of the fixing nail is inserted into the water storage cavity. A sliding plate is provided at the end of the telescopic rod. The sliding plate is slidably connected inside the water storage cavity, and the outer side of the sliding plate is in close contact with the inner side of the water storage cavity. A top column is fixed at the other end of the telescopic rod.

[0012] Preferably, each pair of top outer shell and top metal mesh has notches at both ends, and the notches at both ends match the outer diameter of the output pipe and the input pipe. When each pair of top outer shells and top metal mesh are aligned inside the top shell, the notch is locked outside the output and input pipes.

[0013] Preferably, racks are fixed at both ends of the top outer shell, and connecting shells are fixed at both ends of the top shell. A rotating wheel is rotatably connected inside the connecting shell, and a positioning groove is opened on the outer side of the rotating wheel. A slider is slidably connected to one side of the connecting shell, and a positioning block can be inserted into the positioning groove. A spring is fixed to one side of the slider, and the other end of the spring is fixedly connected to the inner side of the connecting shell. A gear is meshed with one side of the rack, and a gear is fixedly connected to the rotating wheel through a rotating shaft. The upper part of the positioning block is set as an inclined surface, and the lower part of the positioning block is set as a flat surface. The internal shape of the positioning groove matches the positioning block. When the rack rotates into the top shell, the positioning groove presses on the inclined surface of the positioning block, causing the positioning block to separate from the positioning groove.

[0014] Preferably, a pull rope runs through the inside of the spring, and one end of the pull rope is fixedly connected to the slider.

[0015] Preferably, a rotating seat is provided at the middle of the top of the top shell, and a rotating block is rotatably connected above the rotating seat. The outer side of the rotating block is fixedly connected to the ends of multiple pull ropes.

[0016] Preferably, multiple guide frames are provided at both ends of the top shell, and the pull rope passes through the inside of the guide frame, which changes the sliding direction of the pull rope.

[0017] The beneficial effects of this invention are as follows: 1. The combined high-temperature and high-pressure centrifugal compressor of the present invention can fix the heat insulation layer between the top outer shell and the top metal mesh, thereby enhancing the strength of the heat insulation layer. During the installation process, the top outer shell and the top metal mesh are subjected to stress, resulting in high structural strength, easy installation, and stronger stability during use.

[0018] 2. The combined high-temperature and high-pressure centrifugal compressor of the present invention can limit the rotation wheel in one direction by means of the engagement between the positioning block and the positioning groove, which makes it easier to control the limit between the gear and the rack. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the bottom shell in this invention; Figure 3 This is a schematic diagram of the internal structure of the top shell in this invention; Figure 4 This is an exploded view of the top outer shell and the top metal mesh in this invention; Figure 5 This is a partial structural diagram of the top metal mesh in this invention; Figure 6 This is a schematic diagram of the internal structure of the connecting rod in this invention; Figure 7 yes Figure 6 Enlarged view of a portion of point A in the middle; Figure 8 This is a schematic diagram of the internal structure of the connecting shell in this invention.

[0021] In the diagram: 1. Bottom shell; 11. Top shell; 111. Output pipe; 112. Input pipe; 113. Rotating seat; 12. Rotating cavity; 121. Connecting cavity; 122. Centrifugal wheel; 123. Drive shaft; 2. Rotating block; 21. Pull rope; 211. Guide frame; 22. Connecting shell; 221. Rotating wheel; 222. Positioning groove; 223. Slider; 224. Gear; 225. Positioning insert; 226. Spring; 3. Insulation layer; 31. Bottom outer shell; 311. Bottom metal mesh; 32. Top outer shell; 321. Rack; 322. Top metal mesh; 323. Placement groove; 33. Connecting rod; 331. Fixing plate; 332. Top column; 333. Telescopic rod; 334. Fixing nail; 335. Water storage cavity; 336. Slot; 337. Protrusion. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figures 1 to 5 As shown in the figure, a combined high temperature and high pressure centrifugal compressor according to an embodiment of the present invention includes a bottom shell 1, a top shell 11 installed at the top of the bottom shell 1, an output pipe 111 fixed on one side of the top of the top of the top shell 11, and an input pipe 112 fixed on the other side of the top of the top of the top shell 11. Multiple rotating cavities 12 are opened inside both the bottom shell 1 and the top shell 11. The rotating cavities 12 are connected to each other through a connecting cavity 121. The output pipe 111 and the input pipe 112 are connected to the rotating cavities 12 inside the top shell 11. A drive shaft 123 is rotatably connected to the middle of the multiple rotating cavities 12. A centrifugal wheel 122 is rotatably connected inside the rotating cavities 12. The drive shaft 123 is fixedly connected to the middle of the multiple centrifugal wheels 122. The bottom shell 1 has a bottom outer shell 31 inside, and a bottom metal mesh 311 is provided on the inner side of the bottom outer shell 31. A heat insulation layer 3 is provided between the bottom outer shell 31 and the bottom metal mesh 311. The bottom outer shell 31 and the bottom metal mesh 311 are fixed together by a connecting structure. The top shell 11 has a pair of top outer shells 32 and top metal mesh 322 inside, and a heat insulation layer 3 is also provided between the top outer shells 32 and the top metal mesh 322. The top outer shells 32 and the top metal mesh 322 are also fixed together by a connecting structure. The bottom metal mesh 311 and the top metal mesh 322 are shaped to match the internal shapes of the bottom shell 1 and the top shell 11, so that the bottom metal mesh 311 and the top metal mesh 322 can be attached to the inner surfaces of the bottom shell 1 and the top shell 11. In industrial production, some high-temperature and high-pressure gases need to be compressed and transported by a compressor. This method can pressurize the gas, thus requiring the use of a high-temperature and high-pressure centrifugal compressor. When in use, the bottom of the top shell 11 is fixed to the position of use with fasteners. Then, the input pipe 112 is connected to the gas input pipe, and the output pipe 111 is connected to the gas output pipe. The end of the drive shaft 123 is connected to an external drive motor. The motor is started and rotated to drive the drive shaft 123 to rotate. The drive shaft 123 drives multiple centrifugal wheels 122 to rotate. At this time, the centrifugal wheel 122 near the input pipe 112 rotates inside the rotating chamber 12, which can draw the gas inside the input pipe 112. Then, the centrifugal wheel 122 throws the drawn gas into the connecting chamber 121 through the centrifugal force, and then transmits it to the next rotating chamber 12 through the connecting chamber 121. In this way, the input gas is compressed multiple times. After multiple compressions, the gas becomes high-temperature and high-pressure. Then, the high-temperature and high-pressure gas is output to the output pipe through the output pipe 111. During pressurization, the gas temperature rises significantly. At this time, the bottom shell 1 and top shell 11 easily release heat to the outside. Furthermore, excessively high external temperatures of the bottom shell 1 and top shell 11 can affect the operation of other equipment in the working environment. Therefore, a heat insulation layer 3 needs to be installed inside the bottom shell 1 and top shell 11 for heat insulation. However, due to the low strength of the internal structure of the heat insulation layer 3, installation is inconvenient. Therefore, a bottom outer shell 31 and a bottom metal mesh 311 are installed inside and outside the lower heat insulation layer 3, and a top outer shell 32 and a top metal mesh 322 are installed inside and outside the upper heat insulation layer 3. The bottom outer shell 31 and the bottom metal mesh 311 form a complete structure through a connecting structure, which can hold the heat insulation layer 3 in the middle, thereby improving the structural stability of the heat insulation layer 3. The top outer shell 32 and the top metal mesh 322 reinforce the heat insulation layer 3 using the same principle. During installation, the bottom metal mesh 311 and the top metal mesh 322 slide against the inner wall of the bottom shell 1 and the top shell 11, and can be automatically guided by the inner wall, which further facilitates the installation of the heat insulation layer 3 inside the bottom shell 1 and the top shell 11, and also makes it easier to replace the heat insulation layer 3 in the future.

[0024] like Figures 1 to 7 As shown, the connection structure includes multiple connecting rods 33 fixed to the outside of the bottom outer shell 31 and the top outer shell 32. The bottom metal mesh 311 and the inner side of the bottom metal mesh 311 are both penetrated by fixing nails 334. One end of the fixing nail 334 is inserted into the interior of the connecting rod 33, and the other end of the fixing nail 334 is fixed to the fixing plate 331. The fixing nail 334 penetrates the interior of the heat insulation layer 3. When it is necessary to fix the bottom outer shell 31 and the bottom metal mesh 311, place the heat insulation layer 3 between the bottom outer shell 31 and the bottom metal mesh 311, then pick up the fixing nail 334 and pass it through the inside of the bottom metal mesh 311. Then insert the end of the fixing nail 334 into the inside of the connecting rod 33. At this time, the bottom outer shell 31 and the bottom metal mesh 311 can be fixed. The same method is used to fix the top outer shell 32 and the top metal mesh 322. This method can quickly fix the heat insulation layer 3 between the bottom outer shell 31 and the bottom metal mesh 311 or between the top outer shell 32 and the top metal mesh 322, making the installation more convenient.

[0025] like Figures 1 to 7 As shown, both the bottom metal mesh 311 and the top metal mesh 322 have placement grooves 323 on their inner sides, and the fixing plate 331 can be inserted into the placement groove 323. When the fixing plate 331 is inserted into the placement slot 323, the surface of the fixing plate 331 is flush with the inner side of the top metal mesh 322. While the fixing nail 334 is fixing, the fixing plate 331 will be inserted into the placement groove 323. At this time, the fixing plate 331 can be fixed, thereby making the structural stability between the bottom outer shell 31 and the bottom metal mesh 311, and the top outer shell 32 and the top metal mesh 322 stronger, and making it easier to install the heat insulation layer 3.

[0026] like Figures 1 to 7 As shown, the fixing pin 334 has a slot 336 on its outside and a protrusion 337 inside the connecting rod 33. When the fixing pin 334 is inserted into the connecting rod 33, the protrusion 337 and the slot 336 engage. When the end of the fixing pin 334 is inserted into the interior of the connecting rod 33, the slot 336 will fit onto the outside of the protrusion 337. The engagement of the slot 336 and the protrusion 337 can fix the connecting rod 33 and the fixing pin 334, thereby automatically limiting the fixing pin 334 to a fixed depth for easier installation.

[0027] like Figures 1 to 7 As shown, a telescopic rod 333 is slidably connected inside the connecting rod 33. A water storage cavity 335 is opened inside the connecting rod 33. Water is placed inside the water storage cavity 335. The end of the fixing nail 334 is inserted into the water storage cavity 335. A sliding plate is provided at the end of the telescopic rod 333. The sliding plate is slidably connected inside the water storage cavity 335, and the outer side of the sliding plate is in close contact with the inner side of the water storage cavity 335. A top column 332 is fixed at the other end of the telescopic rod 333. During use, both the bottom metal mesh 311 and the top metal mesh 322 will be heated. When heated, heat will be conducted to the inside of the connecting rod 33 through the fixing plate 331 and the fixing nail 334. At this time, the water inside the water storage cavity 335 will be heated and evaporated, causing the inside of the water storage cavity 335 to expand. The force of expansion pushes the sliding plate of the telescopic rod 333. The sliding plate drives the telescopic rod 333. The telescopic rod 333 pushes the top column 332 to press against the inner wall of the bottom shell 1 and the top shell 11. Thus, the bottom outer shell 31 and the top outer shell 32 press against the heat insulation layer 3, making the heat insulation layer 3 more stably attached to the inner wall of the bottom shell 1 and the top shell 11, thereby making the heat insulation layer 3 more stable during use.

[0028] like Figures 1 to 4 As shown, each pair of top outer shell 32 and top metal mesh 322 has notches at both ends, and the notches at both ends match the outer diameter of the output pipe 111 and the input pipe 112. When each pair of top outer shell 32 and top metal mesh 322 are aligned inside the top shell 11, the notch is locked outside the output pipe 111 and the input pipe 112. During the installation of the top outer shell 32 and the top metal mesh 322, both ends will be blocked by the output pipe 111 and the input pipe 112. Therefore, notches will be opened at both ends of the top outer shell 32 and the top metal mesh 322 to adapt to the internal structure of the top shell 11. By setting the top outer shell 32 and the top metal mesh 322 to be symmetrical, it is easier to push them in from both sides of the bottom of the top shell 11, making the installation more convenient.

[0029] like Figures 1 to 8 As shown, racks 321 are fixed to both ends of the top outer shell 32, and connecting shells 22 are fixed to both ends of the top shell 11. A rotating wheel 221 is rotatably connected inside the connecting shell 22. A positioning groove 222 is provided on the outer side of the rotating wheel 221. A slider 223 is slidably connected to one side of the connecting shell 22. A positioning block 225 can be inserted into the positioning groove 222. A spring 226 is fixed to one side of the slider 223. The other end of the spring 226 is fixedly connected to the inner side of the connecting shell 22. A gear 224 is meshed with one side of the rack 321. The rotating wheel 221 is fixedly connected to the gear 224 through a rotating shaft. The upper part of the positioning block 225 is set as an inclined surface, and the lower part of the positioning block 225 is set as a flat surface. The internal shape of the positioning groove 222 matches the positioning block 225. When the rack 321 rotates into the top shell 11, the positioning groove 222 presses on the inclined surface of the positioning block 225, causing the positioning block 225 to separate from the positioning groove 222. During the installation of the top outer shell 32, it is integrated with the top metal mesh 322 through a connecting structure. At this time, the top outer shell 32 is rotated into the top shell 11 along its axis. During this process, the racks 321 at both ends drive the gears 224 to rotate. When the gears 224 rotate, they drive the rotating wheel 221 to rotate. The direction of rotation causes the positioning groove 222 to move the inclined surface of the positioning block 225, thereby causing the positioning block 225 to drive the slider 223 to move backward. When the top outer shell 32 is pushed into the interior, it stops rotating. At this time, the gears 224 stop rotating synchronously. The rotating wheel 221 stops with the gears 224. The elastic force of the spring 226 pushes the slider 223. The slider 223 pushes the positioning block 225 into the interior of the positioning groove 222. Then, during use, the top outer shell 32 will rotate downward due to gravity. At this time, the positioning groove 222 is a flat surface that pushes the bottom surface of the positioning block 225, thereby locking them together and playing a limiting role. Therefore, the top outer shell 32 will be stably fixed inside the top shell 11.

[0030] like Figures 1 to 8 As shown, a pull rope 21 passes through the inside of the spring 226, and one end of the pull rope 21 is fixedly connected to the slider 223; When the top outer shell 32 needs to be removed from the inside of the top shell 11, pull the pull rope 21. The pull rope 21 pulls the slider 223 toward the side of the spring 226. At this time, the slider 223 drives the positioning insert 225 to separate from the positioning groove 222 at the current position. At this time, the gear 224 can rotate in the opposite direction, and the top outer shell 32 can be pulled out from the inside of the top shell 11, which makes it easy to remove the top outer shell 32 from the inside of the top shell 11.

[0031] like Figures 1 to 8 As shown, a rotating seat 113 is provided in the middle of the top of the top shell 11, and a rotating block 2 is rotatably connected above the rotating seat 113. The outer side of the rotating block 2 is fixedly connected to the ends of multiple pull ropes 21. When the top outer shell 32 needs to be removed, since there are multiple positioning blocks 225 that limit the gear 224, in order to make it easier to remove, the rotating block 2 is turned to rotate and the multiple pull ropes 21 are wound up. When winding, the positioning blocks 225 can be separated from the positioning grooves 222 at the same time, which can realize the simultaneous movement of multiple positioning blocks 225, making it easier to remove the top outer shell 32.

[0032] like Figures 1 to 8 As shown, multiple guide frames 211 are provided at both ends of the top shell 11. The pull rope 21 passes through the inside of the guide frame 211, and the guide frame 211 changes the sliding direction of the pull rope 21. When the pull rope 21 is pulled, in order to keep the movement direction of the pull rope 21 stable, multiple guide frames 211 are set to guide the pull rope 21, thereby ensuring that the pull rope 21 can be pulled stably, making it more convenient to replace the heat insulation layer 3.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined high-temperature and high-pressure centrifugal compressor, characterized in that: The device includes a bottom shell, a top shell mounted on the top of the bottom shell, an output pipe fixed on one side of the top of the top shell, and an input pipe fixed on the other side of the top of the top shell. Both the bottom shell and the top shell have multiple rotating cavities inside, which are connected by connecting cavities. The output pipe and the input pipe are connected to the rotating cavities inside the top shell. A drive shaft is rotatably connected to the middle of the multiple rotating cavities, and a centrifugal wheel is rotatably connected inside the rotating cavities. The drive shaft is fixedly connected to the middle of the multiple centrifugal wheels. The bottom shell has a bottom outer shell inside, and a bottom metal mesh inside the bottom outer shell. A heat insulation layer is provided between the bottom outer shell and the bottom metal mesh. The bottom outer shell and the bottom metal mesh are fixed together by a connecting structure. The top shell has a pair of top outer shells and top metal mesh inside, and a heat insulation layer is also provided between the top outer shells and the top metal mesh. The top outer shells and the top metal mesh are also fixed together by a connecting structure. The bottom and top metal meshes are shaped to match the internal shapes of the bottom and top shells, allowing them to adhere to the inner surfaces of the bottom and top shells.

2. The combined high-temperature and high-pressure centrifugal compressor according to claim 1, characterized in that: The connection structure includes multiple connecting rods fixed to the outside of the bottom outer shell and the top outer shell. Fixing nails penetrate the bottom metal mesh and the inside of the bottom metal mesh. One end of the fixing nail is inserted into the inside of the connecting rod, and the other end of the fixing nail is fixed to a fixing plate. The fixing nail penetrates the inside of the heat insulation layer.

3. A combined high-temperature and high-pressure centrifugal compressor according to claim 2, characterized in that: The bottom and top metal meshes are both provided with placement slots on their inner sides, and the fixing plate can be inserted into the placement slots. When the fixing plate is inserted into the placement slot, the surface of the fixing plate is flush with the inner side of the top metal mesh.

4. A combined high-temperature and high-pressure centrifugal compressor according to claim 2, characterized in that: The fixing pin has a slot on the outside and a protrusion inside the connecting rod. When the fixing pin is inserted into the connecting rod, the protrusion engages with the slot.

5. A combined high-temperature and high-pressure centrifugal compressor according to claim 4, characterized in that: The connecting rod has a telescopic rod slidably connected inside. The connecting rod has a water storage chamber inside, which is filled with water. The end of the fixing nail is inserted into the water storage chamber. The end of the telescopic rod is equipped with a sliding plate, which is slidably connected inside the water storage chamber. The outer side of the sliding plate is in close contact with the inner side of the water storage chamber. The other end of the telescopic rod is fixed with a top column.

6. A combined high-temperature and high-pressure centrifugal compressor according to claim 1, characterized in that: Each pair of top outer casings and top metal meshes has notches at both ends, and the notches at both ends match the outer diameter of the output pipe and the input pipe. When each pair of top outer shells and top metal mesh are aligned inside the top shell, the notch is locked outside the output and input pipes.

7. A combined high-temperature and high-pressure centrifugal compressor according to claim 6, characterized in that: Both ends of the top outer shell are fixed with racks, and both ends of the top shell are fixed with connecting shells. The inside of the connecting shell is rotatably connected with a rotating wheel. The outer side of the rotating wheel is provided with a positioning groove. A slider is slidably connected to one side of the connecting shell. The positioning block can be inserted into the positioning groove. A spring is fixed to one side of the slider. The other end of the spring is fixedly connected to the inside of the connecting shell. A gear is meshed with one side of the rack. The rotating wheel is fixedly connected to a gear through a rotating shaft. The upper part of the positioning block is set as an inclined surface, and the lower part of the positioning block is set as a flat surface. The internal shape of the positioning groove matches the positioning block. When the rack rotates into the top shell, the positioning groove presses on the inclined surface of the positioning block, causing the positioning block to separate from the positioning groove.

8. A combined high-temperature and high-pressure centrifugal compressor according to claim 7, characterized in that: A pull rope runs through the inside of the spring, and one end of the pull rope is fixedly connected to the slider.

9. A combined high-temperature and high-pressure centrifugal compressor according to claim 8, characterized in that: A rotating seat is provided in the middle of the top of the top shell, and a rotating block is rotatably connected above the rotating seat. The outer side of the rotating block is fixedly connected to the ends of multiple pull ropes.

10. A combined high-temperature and high-pressure centrifugal compressor according to claim 9, characterized in that: Multiple guide frames are provided at both ends of the top shell. The pull rope passes through the inside of the guide frame, and the guide frame changes the sliding direction of the pull rope.

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