Sealing connection structure of single-shaft compressor

Abstract

The utility model discloses a single-shaft compressor sealing connecting structure which comprises a single-shaft compressor body, an output pipe is installed at the output end of the single-shaft compressor body, a connecting flange is fixedly installed at the tail end of the output pipe, an attaching rubber mat is installed in the connecting flange in an embedded mode, and a connecting rubber pipe is installed in the center of the attaching rubber mat in a penetrating mode. And one end of the connecting rubber pipe is hermetically inserted into the output pipe. The sealing performance after the output pipe is connected with the external pipeline is guaranteed through the attaching rubber mat embedded in the connecting flange and the connecting rubber pipe penetrating through the center of the attaching rubber mat, after the output pipe is connected with the external pipeline, the attaching rubber mat is attached to the flange surface of the external pipeline, and meanwhile the connecting rubber pipe is inserted into the external pipeline. And due to the insertion rubber block fixedly installed on the outer arc face of the connecting rubber pipe, the connecting rubber pipe can adapt to the inner diameters of different pipelines, the connecting rubber pipe can be stably inserted into the external pipeline, and the sealing performance of connection between the output pipe and the external pipeline is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of single-shaft compressors, in particular to a sealing connection structure of a single-shaft compressor. Background Art

[0002] A centrifugal compressor is a blade rotary gas compression machine. Gas is sucked in from the air inlet chamber, and the impeller does work on the gas, increasing the gas pressure, speed, and temperature. Then, it passes through the diffuser, slows down the speed, and converts kinetic energy into pressure energy, increasing the pressure. Then, it flows into the guiding bend and return device, allowing the gas to enter the next stage of compression. Finally, the high-pressure gas from the last stage is discharged along the volute and the gas pipeline. A single-shaft multi-stage centrifugal compressor is generally composed of a stator and a rotor. The rotor generally includes an impeller, a shaft, and a sleeve.

[0003] The Chinese utility model patent with publication number CN202579201U discloses a single-shaft multi-stage centrifugal compressor, including multi-stage impellers, each stage of which adopts a three-dimensional impeller. Each stage of the impeller of the utility model single-shaft multi-stage centrifugal compressor adopts a three-dimensional impeller, and the shape of its three-dimensional twisted blades is closer to the actual state of gas flow inside the impeller, which basically eliminates the secondary flow loss of the compressor, has small flow loss and high efficiency, and is 8-10% more efficient than existing similar compressors, saving 2-10% energy; the three-dimensional impeller has good boosting ability, so that the impeller diameter is smaller than the conventional impeller, so that the equipment has a lower moment of inertia, reduces the starting current of the motor, and runs more safely and reliably; the whole machine performance curve of the three-dimensional impeller centrifugal compressor is flat, and the minimum surge flow can reach 50-70% of the design point flow. Compared with the conventional impeller centrifugal compressor, the whole machine surge flow moves to a smaller value, which improves the reliability of the compressor.

[0004] The compressor in the above-mentioned public document does not have a sealing structure for connection, so that the connection is easy to loosen when the device is used for a long time, resulting in the problem of reduced sealing state. Therefore, a sealing connection structure of a single-axis compressor is now needed. Utility Model Content

[0005] The utility model aims to provide a sealing connection structure of a uniaxial compressor, which ensures the sealing of the connection and the stability of the pipeline connection by fitting a rubber pad and connecting a rubber hose, so as to solve the technical problems mentioned in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sealed connection structure of a uniaxial compressor, comprising a uniaxial compressor body, an output pipe is installed at the output end of the uniaxial compressor body, a connecting flange is fixedly installed at the end of the output pipe, a fitting rubber pad is embedded and installed inside the connecting flange, a connecting rubber hose is installed through the center of the fitting rubber pad, one end of the connecting rubber hose is sealed and inserted into the output pipe, and the other end of the connecting rubber hose extends to the outside of the fitting rubber pad;

[0007] Two sets of protective buckle plates are buckled and installed on the outer side of the connecting flange.

[0008] Preferably, an inner groove is provided on the outer end surface of the output pipe, the fitting rubber pad is adhered to the inner wall of the connecting flange and installed by adhesion, and the fitting rubber pad has several groups of through holes corresponding to the positions of the threaded holes provided on the connecting flange.

[0009] Preferably, a plurality of groups of shrinkage grooves of equal curvature are provided at the outer end of the connecting rubber hose, and rubber pads are glued and installed between each group of shrinkage grooves, and the rubber pads and the outer curved surface of the connecting rubber hose form a whole.

[0010] Preferably, a group of plug-in rubber blocks are respectively installed on the outer arc surface of the connecting rubber hose between each two adjacent groups of shrinkage grooves, and the plug-in rubber blocks are opened toward one side of the fitting rubber pad.

[0011] Preferably, a group of connecting plug plates are fixedly installed on one end of the outer arc surface of the protective buckle plate, and a group of limiting plates are fixedly installed on the other end of the outer arc surface of the protective buckle plate. The connecting plug plates and the limiting plates are installed at the same position, and the protective buckle plate is provided with limiting holes corresponding to the positions of each group of through holes.

[0012] Preferably, a deformation groove is provided in the middle of the outer side of the connecting plug plate, two groups of conical protrusions are symmetrically installed on the outer side of the connecting plug plate, and a plug hole is provided on the limiting plate corresponding to the position of the connecting plug plate.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The sealing performance of the output pipe after being connected to the external pipeline is ensured by embedding the fitting pad installed inside the connecting flange and the connecting hose installed through the center of the fitting pad. After the output pipe is connected to the external pipeline, the fitting pad fits the surface of the external pipeline flange, and the connecting hose is inserted into the external pipeline at the same time. The plug-in rubber block fixedly installed on the outer arc surface of the connecting hose allows the connecting hose to adapt to different inner diameters of pipelines, so that the connecting hose can be stably inserted into the external pipeline, further improving the sealing performance of the connection between the output pipe and the external pipeline.

[0015] 2. The flange connection between the output pipe and the external pipeline is sealed and locked by closing and buckling two sets of protective buckle plates to prevent the flange connection between the output pipe and the external pipeline from loosening when the device is working, making the connection more tight and sealed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the installation structure of the protective gusset plate of the utility model;

[0018] Figure 3 This is a schematic diagram of the disassembly of the installation structure of the connecting hose of the utility model;

[0019] Figure 4 This is a schematic diagram of the disassembly of the protective gusset plate structure of the utility model;

[0020] Figure 5 It is an enlarged schematic diagram of the structure at point A of the utility model.

[0021] In the figure: 1. Single-axis compressor body; 2. Output pipe; 3. Connecting flange; 4. Inner groove; 5. Fitting rubber pad; 6. Connecting rubber hose; 7. Shrinkage groove; 8. Rubber pad; 9. Plug-in rubber block; 10. Through hole; 11. Protective buckle plate; 12. Connecting plug plate; 13. Deformation groove; 14. Conical protrusion; 15. Limiting plate; 16. Limiting hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides: a single-shaft compressor sealing connection structure, such as Figure 1-Figure 5 As shown, it includes a uniaxial compressor body 1, an output pipe 2 is installed at the output end of the uniaxial compressor body 1, a connecting flange 3 is fixedly installed at the end of the output pipe 2, a fitting rubber pad 5 is embedded and installed inside the connecting flange 3, a connecting rubber hose 6 is installed through the center of the fitting rubber pad 5, one end of the connecting rubber hose 6 is sealed and inserted into the output pipe 2, and the other end of the connecting rubber hose 6 extends to the outside of the fitting rubber pad 5; two sets of protective buckle plates 11 are buckled and installed on the outside of the connecting flange 3.

[0024] Preferably, an inner groove 4 is provided on the outer end surface of the output pipe 2, and a fitting rubber pad 5 is adhered to the inner wall of the connecting flange 3 and installed thereon. A plurality of through holes 10 are provided on the fitting rubber pad 5 at positions corresponding to the threaded holes on the connecting flange 3. The connecting flange 3 installed at the outer end of the output pipe 2 is connected to an external pipeline, and the inner groove 4 provided at the outer end of the output pipe 2 limits the fitting rubber pad 5 to ensure that the fitting rubber pad 5 can fit the surface of the external pipeline. The fitting rubber pad 5 can reduce vibration at the pipeline connection and prevent the output pipe 2 and the external pipeline from loosening during the use of the device. At the same time, the fitting rubber pad 5 can greatly improve the sealing of the pipeline connection by fitting the external pipeline surface. The through holes 10 provided on the fitting rubber pad 5 at positions corresponding to the threaded holes on the connecting flange 3 enable the bolts used to connect the pipelines to pass through smoothly, making the pipeline connection more stable.

[0025] Furthermore, a plurality of groups of shrinkage grooves 7 with equal curvature are provided at the outer end of the connecting rubber hose 6, and rubber pads 8 are glued and installed between each group of shrinkage grooves 7, and the rubber pads 8 and the outer curved surface of the connecting rubber hose 6 form a whole. The shrinkage grooves 7 provided at the outer end of the connecting rubber hose 6 enable the connecting rubber hose 6 to be deformed, and the rubber pads 8 glued between the shrinkage grooves 7 can ensure that the connecting rubber hose 6 remains a whole when the connecting rubber hose 6 is deformed, thereby avoiding gas leakage.

[0026] Furthermore, a group of plug-in rubber blocks 9 are respectively installed on the outer arc surface of the connecting rubber hose 6 between each two adjacent groups of shrinkage grooves 7. The plug-in rubber blocks 9 are opened to one side of the fitting rubber pad 5. The plug-in rubber blocks 9 installed on the outer arc surface of the connecting rubber hose 6 can be inserted into the external pipeline to limit the connecting rubber hose 6, making the plug-in of the connecting rubber hose 6 more stable, and improving the connectivity and sealing of the connecting rubber hose 6 to the external pipeline.

[0027] It is worth mentioning that a group of connecting plug plates 12 are fixedly installed at one end of the outer arc surface of the protective buckle plate 11, and a group of limiting plates 15 are fixedly installed at the other end of the outer arc surface of the protective buckle plate 11. The connecting plug plates 12 and the limiting plates 15 are installed at the same position. The protective buckle plates 11 are penetrated by limiting holes 16 corresponding to the positions of each group of through holes 10. The two groups of protective buckle plates 11 are used in opposite directions. When the positions of the connecting plug plates 12 and the limiting plates 15 are the same, it can be ensured that after buckling, the connecting plug plates 12 can be inserted into the corresponding limiting plates 15 to complete the limiting of the two groups of protective buckle plates 11, thereby improving the stability of the connection between the two groups of protective buckle plates 11.

[0028] Specifically, a deformation groove 13 is provided in the middle of the outer side of the connecting plug plate 12, and two groups of conical protrusions 14 are symmetrically installed on the outer side of the connecting plug plate 12. The limiting plate 15 is provided with a socket corresponding to the position of the connecting plug plate 12. The conical protrusion 14 can be opened after being inserted into the socket provided in the limiting plate 15 of the connecting plug plate 12 to complete the restriction of the position of the connecting plug plate 12, and the deformation groove 13 provided on the outer side of the connecting plug plate 12 can ensure that the conical protrusion 14 is smoothly inserted into the socket. The connection between the output pipe 2 and the external pipeline is buckled by buckling the two groups of protective buckle plates 11, and the bolts are passed through the limiting holes 16 to be locked, so as to further fix the position of the protective buckle plate 11. At the same time, due to the different force directions, the protective buckle plate 11 is not easily vibrated off, so that the protective buckle plate 11 can better seal the pipeline connection.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing connection structure for a single-shaft compressor, characterized in that: The invention comprises a uniaxial compressor body (1), an output pipe (2) being installed at the output end of the uniaxial compressor body (1), a connecting flange (3) being fixedly installed at the end of the output pipe (2), a bonding rubber pad (5) being embedded and installed inside the connecting flange (3), a connecting rubber hose (6) being installed through the center of the bonding rubber pad (5), one end of the connecting rubber hose (6) being sealed and inserted into the output pipe (2), and the other end of the connecting rubber hose (6) extending to the outside of the bonding rubber pad (5); Two groups of protective buckle plates (11) are buckled and installed on the outer side of the connecting flange (3).

2. A uniaxial compressor sealing connection structure according to claim 1, characterized in that: The outer end surface of the output pipe (2) is provided with an inner groove (4), the fitting rubber pad (5) is fitted to the inner wall of the connecting flange (3) by adhesion, and the fitting rubber pad (5) is provided with a plurality of groups of through holes (10) at positions corresponding to the threaded holes provided on the connecting flange (3).

3. A uniaxial compressor sealing connection structure according to claim 2, characterized in that: The outer end of the connecting rubber tube (6) is provided with a plurality of groups of contraction grooves (7) of equal arc, and a rubber pad (8) is glued and installed between each group of contraction grooves (7), and the rubber pad (8) and the outer arc surface of the connecting rubber tube (6) form a whole.

4. A uniaxial compressor sealing connection structure according to claim 3, characterized in that: A group of plug-in rubber blocks (9) are respectively installed between each two adjacent groups of contraction grooves (7) on the outer arc surface of the connecting rubber tube (6), and the plug-in rubber blocks (9) are opened toward one side of the bonding rubber pad (5).

5. A sealing connection structure for a single-shaft compressor according to claim 4, characterized in that: A group of connecting plug plates (12) are fixedly mounted on one end of the outer arc surface of the protection buckle plate (11), and a group of limiting plates (15) are fixedly mounted on the other end of the outer arc surface of the protection buckle plate (11). The connecting plug plates (12) and the limiting plates (15) are installed at the same position, and the protection buckle plate (11) is provided with limiting holes (16) penetrating the positions corresponding to the groups of through holes (10).

6. A sealing connection structure for a single-shaft compressor according to claim 5, characterized in that: A deformation groove (13) is provided in the middle of the outer side of the connecting plug plate (12), two groups of conical protrusions (14) are symmetrically installed on the outer side of the connecting plug plate (12), and a plug hole is provided on the limiting plate (15) at a position corresponding to the connecting plug plate (12).

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