Moving device of liquid injection pipe for compressor unit

Abstract

The utility model belongs to the technical field of mechanical transmission, and particularly relates to a liquid injection pipe moving device for a compressor unit, which comprises a support frame, a transmission unit and a screw rod, the supporting frame comprises a gear frame and a movable frame; the transmission unit is arranged on the gear carrier and comprises a driving gear, a middle transmission gear set and two terminal gears, and the multiple gears are in meshing transmission; the number of the screw rods is two, the head end of each screw rod penetrates through the movable frame and the gear frame in sequence in a rotatable mode, and the head end of each screw rod is fixed to the corresponding terminal gear; according to the liquid injection pipe moving device for the compressor unit, torque is transmitted through the gears, an electric tool serves as a power source, and the inserting stroke and the removing stroke of the liquid injection nozzle assembly in the compressor unit can be conveniently and rapidly achieved. Friction resistance generated by coking in the compressor can be overcome, friction force can be overcome for particularly large coking conditions, and the liquid injection pipe nozzle can be quickly pulled out.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical transmission, and particularly relates to a moving device of a liquid injection pipe for a compressor unit. Background Art

[0002] Centrifugal compressors occupy an important position in various sectors of the industrial field. The chemical process is becoming more and more complex, which puts higher requirements on the structural design of centrifugal compressors. Among them, the product gas compressor (including cracked gas in large ethylene plants and cracked gas and product gas in large olefin production) contains olefins, high molecular hydrocarbons, peroxides, sulfides and nitrogen oxides as its medium. These substances will undergo polymerization reactions at a certain temperature and pressure, which is the so-called coking phenomenon. The coking material is easy to block the impeller, partition, flow channel and seal in the casing. At the same time, some droplets will flush the impeller with the flow of gas, which will not only affect the aerodynamic performance of the compressor, but also its mechanical properties and service life. Therefore, in the production process, water injection or organic solvent oil injection is usually used to avoid or limit coking. Water and solvent oil are inserted into the sealing body through the injection pipe of the nozzle assembly and injected into the compressor through the ball valve. Water or solvent is sprayed into the compressor in a mist form along the injection pipe through the nozzle. When the compressor works continuously for a long time, the nozzle is easily clogged by tar or dirt, and the nozzle needs to be replaced. When replacing the nozzle, the injection tube needs to be removed from the compressor and inserted into the compressor when in use. Therefore, it is necessary to develop a tooling part to facilitate the insertion and removal of the injection tube. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a moving device for a liquid injection pipe for a compressor unit, which is used for inserting and removing a nozzle assembly for injecting liquid into the compressor. The nozzle assembly is provided with a non-standard flange and a liquid injection pipe, and the liquid injection pipe is inserted into the sealing body of the compressor unit, and includes a support frame, a transmission unit and a screw.

[0004] The support frame includes a gear frame and a moving frame, which are independently arranged;

[0005] The transmission unit is arranged on the gear frame, and includes a driving gear, an intermediate transmission gear set and two terminal gears, and multiple gears are meshed for transmission;

[0006] Two screw rods are provided, and the head end of each screw rod can rotate in turn to move the frame and the gear frame, and the head end is fixed on its corresponding terminal gear; the screw rod is threadedly connected to the moving frame, and the screw rod is connected to the gear frame through a bearing.

[0007] Furthermore, the movable frame is a circular ring structure as a whole, with two semicircular parts, and the first semicircular part is provided with threaded holes and flange fixing holes for supporting two screws; the second semicircular part is an arc-shaped buckle plate, one end of which is hinged on the starting section of the first semicircular part, and the other end is fixed to the end of the first semicircular part by screws to form a clamping structure; the gear frame is also provided with two semicircular parts with the same structure as the movable frame.

[0008] Furthermore, recessed annular grooves are respectively provided on the two semicircular inner walls of the movable frame and the gear frame; an embedding strip of the same thickness is embedded in the recessed annular groove, and a rubber strip is embedded inside the embedding strip, so as to change the clamping diameter and make it more stable.

[0009] Furthermore, the movable frame is a circular fixed plate with a through hole at the center thereof, and threaded holes for installing two screws and a plurality of elongated holes are arranged on the fixed plate, and the plurality of elongated holes are distributed radiatingly with the through hole as the center of the circle; similarly, the gear frame is also provided with elongated holes and a central through hole that match each other, and the non-standard flange mounting hole of the nozzle assembly and the flange mounting hole on the sealing body are fixed with the corresponding elongated holes by bolts.

[0010] The utility model provides a moving device for a liquid injection pipe for a compressor unit, which transmits torque through gears and uses an electric tool as a power source, and can conveniently and quickly realize the insertion and removal of the liquid injection nozzle assembly in the compressor unit. The friction resistance generated by coking inside the compressor can be overcome, and in the case of particularly large coking, the friction force can be overcome to quickly pull out the liquid injection pipe nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural diagram of an embodiment of the utility model.

[0012] Figure 2 It is a schematic diagram of the position of the embedded strip;

[0013] Figure 3 It is a schematic structural diagram of an embodiment of a mobile rack;

[0014] Figure 4 This is a schematic diagram of the connection between the mobile rack and the non-standard flange position;

[0015] Figure 5 It is a schematic structural diagram of an embodiment of a screw rod;

[0016] Figure 6 for Figure 5 A magnified schematic diagram of the middle A area;

[0017] Figure 7 It is a schematic diagram of the cooperation between the utility model and the sealing component.

[0018] 1. Compressor; 2. Non-standard flange; 3. Injection pipe; 4. Sealing body; 5. Screw; 6. Gear rack; 7. Moving rack; 8. Driving gear; 9. Intermediate transmission gear set; 10. Terminal gear; 11. Threaded hole; 12. Buckle plate; 13. Screw; 14. Embedded strip; 15. Long hole; 16. Mounting hole; 17. Sealing body flange. DETAILED DESCRIPTION

[0019] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0020] refer to Figure 1 The utility model provides a moving device for a liquid injection pipe 3 for a compressor 1, which is used for inserting and removing a nozzle assembly for injecting liquid into the compressor 1. The nozzle assembly is provided with a non-standard flange 2 and a liquid injection pipe 3, and the liquid injection pipe 3 is inserted into a sealing body 4 of the compressor 1, including a support frame, a transmission unit and a screw 5.

[0021] The support frame includes a gear frame 6 and a moving frame 7, which are independently arranged;

[0022] The transmission unit is arranged on the gear frame 6, and comprises a driving gear 8, an intermediate transmission gear set 9 and two terminal gears 10. The driving gear 8 is provided with a rotating shaft, which is inserted into the handheld power tool to give power to the driving gear 8.

[0023] Two screw rods 5 are provided, and the head end of each screw rod 5 can rotate in turn to move the frame 7 and the gear frame 6, and the head end is fixed on its corresponding terminal gear 10; the screw rod 5 is threadedly connected to the moving frame 7, and the screw rod 5 is connected to the gear frame 6 through a bearing.

[0024] refer to Figure 7 When in use, the mobile device is installed on the nozzle assembly and the outer periphery of the sealing body 4. The installation process is as follows: the non-standard flange 2 used for fixing the nozzle assembly is fixed at the center of the mobile frame 7, the flange plate of the sealing body 4 is fixed at the center of the gear frame 6, the injection pipe 3 of the nozzle assembly is inserted into the sealing body 4, and the entire mobile device is installed on the outer periphery of the sealing body 4 and the nozzle assembly. The active gear 8 is driven to rotate by a handheld electric tool, and is transmitted to the two terminal gears 10 through the intermediate transmission gear set 9. The two terminal gears 10 rotate to control the two screws 5 to rotate forward or reverse, driving the entire nozzle assembly in and out of the sealing body 4, thereby realizing the movement of the injection pipe 3.

[0025] As an improvement of the scheme, the mobile frame 7 is a circular ring structure as a whole, with two semicircular parts, the first semicircular part is provided with threaded holes 11 and flange fixing through holes for supporting two screws 5; the second semicircular part is an arc-shaped buckle plate 12, one end of which is hinged on the starting section of the first semicircular part, and the other end is fixed to the end of the first semicircular part by screws 13, forming a hoop structure; the gear frame 6 is also provided with two semicircular parts identical to the mobile frame 7. The non-standard flange 2 of the nozzle assembly is clamped and fixed to the central ring of the mobile frame 7 by the buckle plate 12, and is tightened and fixed by the screws 13 at the end, and the sealing body flange 17 on the sealing body 4 is also fixed to the central ring on the gear frame 6.

[0026] refer to Figure 2 As an improvement of the scheme, in order to adapt to the installation of nozzle assemblies with non-standard flanges 2 of different diameters, recessed annular grooves are respectively provided on the two semicircular inner walls of the mobile frame 7 and the gear frame 6; an embedding strip 14 of the same thickness is embedded in the recessed annular groove, and a rubber strip is embedded on the inner side of the embedding strip 14 to change the clamping diameter and make it more stable. Through the embedding strip 14, the clamping diameter of the flange of the mobile frame 7 and the gear frame 6 is changed, and it has universal adaptability.

[0027] refer to Figure 3-4 As an improvement of the scheme, in order to adapt to the installation of nozzle assemblies with non-standard flanges 2 of different diameters and flanges of sealing bodies 4 of different diameters, the movable frame 7 is a circular fixed plate, a through hole is provided at the center of the circular fixed plate, a threaded hole 11 for installing two screws 5 and a plurality of elongated holes 15 are provided on the fixed plate, and the plurality of elongated holes 15 are radiated and distributed with the through hole as the center of the circle; similarly, the gear frame 6 is also provided with elongated holes 15 and a central through hole that match each other, the mounting hole 16 of the non-standard flange 2 of the nozzle assembly, the mounting hole 16 of the sealing body flange 17 on the sealing body 4 and the corresponding elongated hole 15 are fixed by bolts, thereby adapting to the installation of nozzle assemblies and sealing bodies 4 with flanges of different specifications and sizes.

[0028] refer to Figure 5-6 As an improvement to the solution, in order to overcome the greater frictional resistance caused by the coking inside the compressor 1, for particularly large coking conditions, the ends of the two screws 5 can be processed into hexagons, and the hexagonal ends of the screws 5 can be directly supported by an external wrench, and torque can be directly applied to rotate, thereby overcoming greater friction and facilitating the removal of the nozzle. Alternatively, the screw 5 can be flattened at 15 mm near the terminal gear 10 side of the screw 5, and the wrench can be applied to the flattened portion to apply torque to rotate.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A moving device for a liquid injection pipe for a compressor unit, used for inserting and removing a nozzle assembly for injecting liquid into a compressor, wherein the nozzle assembly is provided with a non-standard flange and a liquid injection pipe, the liquid injection pipe is inserted into a sealing body of the compressor unit, and the sealing body is provided with a connecting flange, characterized in that: It includes a support frame, a transmission unit and a screw rod. A support frame, including a gear frame and a mobile frame; The transmission unit is arranged on the gear frame, and includes a driving gear, an intermediate transmission gear set and two terminal gears, and multiple gears are meshed for transmission; Two screw rods are provided, and the head end of each screw rod can rotate to pass through the moving frame and the gear frame in turn, and the head end is fixed on its corresponding terminal gear; the screw rod is threadedly connected to the moving frame, and the screw rod is connected to the gear frame through a bearing.

2. A moving device for a liquid injection pipe for a compressor unit according to claim 1, characterized in that: The movable frame is a circular ring structure as a whole, with two semicircular parts, and the first semicircular part is provided with two threaded holes and multiple flange fixing through holes; the second semicircular part is an arc-shaped buckle plate, one end of which is hinged on the starting section of the first semicircular part, and the other end is fixed to the end of the first semicircular part by screws to form a clamp structure; the gear frame is also provided with two semicircular parts with the same structure as the movable frame.

3. A moving device for a liquid injection pipe for a compressor unit according to claim 2, characterized in that: The two semicircular inner walls of the moving frame and the gear frame are respectively provided with recessed ring grooves; an embedding strip with the same thickness is embedded in the recessed ring groove, and a rubber strip is embedded in the inner side of the embedding strip.

4. The moving device of the liquid injection pipe for a compressor unit according to claim 1, characterized in that: The movable frame is a circular fixed plate with a through hole at the center thereof. The fixed plate is provided with threaded holes for installing two screws and a plurality of elongated holes, and the plurality of elongated holes are distributed radiatingly with the through hole as the center of the circle. Similarly, the gear frame is also provided with elongated holes and a central through hole that match each other, and the non-standard flange mounting hole of the nozzle assembly and the flange mounting hole on the sealing body and the corresponding elongated hole are fixed by bolts.

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