Multi-stage screw compressor

Abstract

The utility model discloses a multi-stage screw compressor, and belongs to the technical field of screw compressors. Comprising a low-pressure shell; the air inlet pipe is fixedly communicated with the low-pressure shell; the air filter is installed on the low-pressure shell, and an exhaust pipe is fixedly connected to the air filter; the sealing mechanism comprises a rubber strip mounted on the exhaust pipe, and the rubber strip is used for sealing between the air inlet pipe and the exhaust pipe; the fixing mechanism comprises four fixing boxes embedded in the exhaust pipe, clamping blocks are connected to the inner walls of the fixing boxes in a sliding mode, four clamping grooves are formed in the inner wall of the air inlet pipe, and the clamping blocks are matched with the clamping grooves in size; and the inner wall of the fixed box is fixedly connected with a fixed plate. According to the multi-stage screw compressor, the problem that when impurities are attached to an air filter on the multi-stage screw compressor, the air filter is difficult to disassemble, assemble and replace quickly is solved.

Description

Technical Field

[0001] This application relates to the technical field of screw compressors, and specifically to a multi-stage screw compressor. Background Technique

[0002] A multi-stage screw compressor refers to a compressor with two or more screws. Through multiple stages of compression, air is gradually compressed to the required pressure. This design makes the compression process smoother, reducing temperature rise and energy loss. At the same time, multi-stage screw compressors are widely used in painting industries such as automotive painting, furniture painting, and industrial equipment painting. Their stable air pressure and flow help ensure the uniformity and consistency of painting operations, thereby improving the painting quality.

[0003] For example, the patent with the publication number CN210949136U specifically discloses a multi-stage screw compressor, which includes a housing, a multi-stage rotor group, a male rotor, a female rotor, a gear, a male adjustment gasket, and a female adjustment gasket. The clearance adjustment structure of this multi-stage screw compressor is simple and it is relatively convenient to adjust the exhaust clearance.

[0004] However, when the existing multi-stage screw compressor filters the inhaled air through an air filter, since the air filter is installed on the intake pipe of the multi-stage screw compressor by means of bolts, when impurities adhere to the air filter after long-term operation, users need to use tools such as wrenches to complete the disassembly of the air filter. This not only has a low disassembly and assembly efficiency, is time-consuming and laborious, but also affects the working efficiency of the multi-stage screw compressor.

[0005] Therefore, it is necessary to provide a multi-stage screw compressor to solve the above problems.

[0006] It should be noted that the above information disclosed in this background technical part is only used to understand the background technology of the concept of this application, and therefore, it may include information that does not constitute prior art. Utility Model Content

[0007] Based on the above problems existing in the prior art, the problem to be solved by this application is: to provide a multi-stage screw compressor, which solves the problem that it is difficult to quickly disassemble, assemble and replace the air filter on the multi-stage screw compressor when impurities adhere to it.

[0008] The technical solution adopted by this application to solve its technical problems is: a multi-stage screw compressor, including a low-pressure housing;

[0009] An intake pipe, which is fixedly connected to the low-pressure housing;

[0010] An air filter, which is installed on the low-pressure housing, and an exhaust pipe is fixedly connected to the air filter;

[0011] Sealing mechanism, which includes a rubber strip installed on the exhaust pipe, and the rubber strip is used for sealing between the intake pipe and the exhaust pipe;

[0012] Fixing mechanism, which includes four fixing boxes embedded in the exhaust pipe. A clamping block is slidably connected to the inner wall of the fixing box. Four clamping grooves are formed in the inner wall of the intake pipe, and the sizes of the clamping block and the clamping grooves are adapted to each other;

[0013] A fixing plate is fixedly connected to the inner wall of the fixing box. Springs are fixedly connected to the surfaces of the fixing plate and the clamping block that are close to each other. A pull rope is slidably penetrated through the exhaust pipe. One end of the pull rope is fixedly connected to the clamping block, and the other end of the pull rope is fixedly connected to an iron ring;

[0014] Among them: the clamping grooves are adapted to the size of the clamping block. When the exhaust pipe is pushed down and enters the intake pipe, the clamping block contacts the intake pipe and is compressed by the intake pipe to contract. The springs are synchronously contracted under the compression of the clamping block. When the clamping block reaches the clamping groove, the clamping block loses the resistance of the intake pipe and is inserted into the clamping groove under the action of the elastic force of the spring, completing the fixation of the air filter.

[0015] Further, the sealing mechanism includes an annular groove formed in the exhaust pipe. A plurality of spikes are fixedly connected to the annular groove. A plurality of barbs are fixedly connected to the spikes. The tips of the barbs are opposite to the tips of the spikes, and the barbs are arranged obliquely. The rubber strip is wound around the annular groove.

[0016] Further, the fixing mechanism further includes four positioning rods fixedly connected to the exhaust pipe. Four positioning holes are formed in the intake pipe, and the sizes of the positioning rods and the positioning holes are adapted to each other.

[0017] Further, four sleeve rods are fixedly connected to the exhaust pipe, and the sleeve rods are L-shaped.

[0018] Further, a plurality of rotating shafts are rotatably connected to the surface of the clamping block.

[0019] Further, six guiding blocks are fixedly connected to the inner wall of the fixing box. The six guiding blocks are grouped in threes. Six guiding grooves are formed in the surface of the clamping block, and the guiding grooves are slidably connected to the guiding blocks.

[0020] Further, balls are rotatably connected to the surfaces of the guiding blocks, and the balls are spherical structures.

[0021] The beneficial effects of this application are as follows: A multi-stage screw compressor provided by this application, through the setting of a fixing mechanism, with the cooperation of a spring, a clamping block, a clamping groove, and a pulling rope, can quickly disassemble and assemble the air filter, reducing the problem that tools are required for installing the air filter, and thus improving the practicality of the multi-stage screw compressor.

[0022] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. The following will refer to the drawings and further elaborate on this application in detail. Brief Description of the Drawings

[0023] The schematic diagrams in the specification that form a part of this application are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0024] Figure 1 is the overall schematic diagram of a multi-stage screw compressor in this application;

[0025] Figure 2 is the structural schematic diagram of the intake pipe and the exhaust pipe in this application;

[0026] Figure 3 is the sectional structural schematic diagram of the intake pipe and the exhaust pipe in this application;

[0027] Figure 4 is in this application Figure 3 The enlarged structural schematic diagram of part A;

[0028] Figure 5 is the structural schematic diagram of the fixing mechanism in this application.

[0029] Among them, the reference numerals in the drawings are as follows:

[0030] 1, low-pressure housing; 11, intermediate housing; 12, high-pressure housing; 13, intake pipe; 2, air filter; 21, exhaust pipe; 3, fixing mechanism; 301, positioning rod; 302, positioning hole; 303, fixing box; 304, fixing plate; 305, spring; 306, clamping block; 307, rotating shaft; 308, clamping groove; 309, pulling rope; 310, sleeve rod; 311, guiding block; 312, ball; 313, guiding groove; 4, sealing mechanism; 41, annular groove; 42, spike; 43, barb; 44, rubber strip. Detailed Embodiment

[0031] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with the embodiments to elaborate on this application in detail.

[0032] To enable those skilled in the art to better understand the solution of this application, the following will clearly and completely describe the technical solution in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0033] As Figure 1 shown, this application provides a multi-stage screw compressor, which includes a low-pressure housing 1. The low-pressure housing 1 includes an air inlet pipe 13 fixedly connected to the low-pressure housing 1. An intermediate housing 11 is fixedly connected to the low-pressure housing 1 by bolts, and a high-pressure housing 12 is fixedly connected to the intermediate housing 11 by bolts. The low-pressure housing 1, the intermediate housing 11, and the high-pressure housing 12 are spliced together to form a multi-stage screw compressor.

[0034] This multi-stage screw compressor is connected to a painting device through an external pipeline. After the air inlet pipe 13 sucks in and compresses the outside air, the painting device uses the compressed air provided by the multi-stage screw compressor to atomize the paint and spray it onto the workpiece.

[0035] As Figure 1 - Figure 2 shown, an air filter 2 is installed on the low-pressure housing 1. The air filter 2 includes an exhaust pipe 21 fixedly connected to the air filter 2.

[0036] The air filter 2 is an important component in the intake system of the multi-stage screw compressor, and it is used to filter out particulate matters such as dust and impurities in the air entering the multi-stage screw compressor.

[0037] As Figure 2 and Figure 3 shown, a sealing mechanism 4 is installed on the exhaust pipe 21. The sealing mechanism 4 includes an annular groove 41 opened on the exhaust pipe 21. A plurality of spikes 42 are fixedly connected to the annular groove 41. A plurality of barbs 43 are fixedly connected to the spikes 42. The tip of the barb 43 is opposite to the tip of the spike 42, and the barb 43 is arranged in an inclined shape. A rubber strip 44 is wound around the annular groove 41.

[0038] When the rubber strip 44 is wound around the annular groove 41, the spikes 42 and the barbs 43 are simultaneously inserted into the rubber strip 44, which can fix the rubber strip 44. And because the barb 43 is arranged in an inclined shape, the situation of the rubber strip 44 falling off can be further reduced. At the same time, the rubber strip 44 is a straight strip and forms a circular ring structure after winding. Therefore, by prying up one end of the rubber strip 44, it can be taken out from the annular groove 41, which is convenient for replacing the rubber strip 44.

[0039] As Figure 1 - Figure 5As shown, there is a fixing mechanism 3. The fixing mechanism 3 includes four fixing boxes 303 embedded on the exhaust pipe 21. A clamping block 306 is slidably connected to the inner wall of the fixing box 303. Four clamping grooves 308 are formed on the inner wall of the intake pipe 13. The sizes of the clamping block 306 and the clamping grooves 308 are adapted to each other. A fixing plate 304 is fixedly connected to the inner wall of the fixing box 303. A spring 305 is fixedly connected to the surfaces of the fixing plate 304 and the clamping block 306 that are close to each other. A pull rope 309 is slidably penetrated through the exhaust pipe 21. One end of the pull rope 309 is fixedly connected to the clamping block 306, and the other end of the pull rope 309 is fixedly connected to an iron ring.

[0040] The clamping grooves 308 are adapted to the size of the clamping block 306. When the exhaust pipe 21 is pushed down and enters the intake pipe 13, the clamping block 306 contacts the intake pipe 13 and is compressed under the extrusion of the intake pipe 13. The spring 305 is synchronously compressed under the extrusion of the clamping block 306. When the clamping block 306 reaches the clamping groove 308, the clamping block 306 loses the resistance of the intake pipe 13 and is inserted into the clamping groove 308 under the elastic force of the spring 305, completing the fixation of the air filter 2.

[0041] As Figure 1 - Figure 5 shown, the fixing mechanism 3 further includes four positioning rods 301 fixedly connected to the exhaust pipe 21. Four positioning holes 302 are formed on the intake pipe 13. The sizes of the positioning rods 301 and the positioning holes 302 are adapted to each other. Four sleeve rods 310 are fixedly connected to the exhaust pipe 21. The sleeve rods 310 are L-shaped.

[0042] The cooperation of the positioning rods 301 and the positioning holes 302 facilitates the accurate entry of the exhaust pipe 21 into the intake pipe 13. The arrangement of the sleeve rods 310 facilitates the fixation of the pull rope 309, and further facilitates the user to remove the air filter 2.

[0043] A number of rotating shafts 307 are rotatably connected to the surface of the clamping block 306. Six guiding blocks 311 are fixedly connected to the inner wall of the fixing box 303. The six guiding blocks 311 are in groups of three. Six guiding grooves 313 are formed on the surface of the clamping block 306. The guiding grooves 313 are slidably connected to the guiding blocks 311. A ball 312 is rotatably connected to the surface of the guiding block 311. The ball 312 is of a spherical structure.

[0044] The rotating shafts 307 can reduce the friction force when the clamping block 306 contacts the intake pipe 13. The cooperation of the guiding blocks 311 and the guiding grooves 313 can improve the stability of the clamping block 306 during sliding, and at the same time avoid the situation that the clamping block 306 slides out of the fixing box 303 under the elastic force of the spring 305. The balls 312 can reduce the friction force when the clamping block 306 slides, improving the smoothness of the clamping block 306 during sliding.

[0045] Working principle:

[0046] Start the multi-stage screw compressor. First, the external air is filtered by the air filter 2 to remove dust and impurities, and then enters the intake pipe 13 of the compressor. Under the control of the intake valve, the air is guided into the low-pressure housing 1. The processed gas is transported to the painting equipment through an external pipeline, and the compressed air provided by the compressor is used to atomize the paint and spray it onto the workpiece.

[0047] First, select a rubber strip 44 with good sealing material and cut it to a size adapted to the circumference of the annular groove 41. Then wind the rubber strip 44 around the annular groove 41. At this time, the spikes 42 contact the rubber strip 44 and insert into the rubber strip 44 to fix the rubber strip 44. When the air filter 2 works, the rubber strip 44 can improve the sealing between the intake pipe 13 and the exhaust pipe 21.

[0048] When installing the air filter 2, first align the positioning rod 301 with the positioning hole 302, and then push the air filter 2 downward to drive the exhaust pipe 21 into the intake pipe 13. The positioning rod 301 first inserts into the positioning hole 302 to limit the downward sliding direction of the exhaust pipe 21 and avoid the problem that it is difficult for the exhaust pipe 21 to accurately enter the intake pipe 13 when sliding downward. Then the latch 306 contacts the intake pipe 13 and contracts under the extrusion of the intake pipe 13. The spring 305 contracts synchronously under the extrusion of the latch 306. When the latch 306 reaches the card slot 308, the latch 306 loses the resistance of the intake pipe 13 and inserts into the card slot 308 under the action of the elastic force of the spring 305 to complete the fixation of the air filter 2. Pull the four pull ropes 309 in turn. The pull ropes 309 drive the latch 306 to contract and move away from the card slot 308. At this time, put the iron ring on the sleeve rod 310, and the air filter 2 can be separated from the intake pipe 13, which is convenient for disassembling and maintaining the air filter 2.

[0049] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A multi-stage screw compressor, characterized in that: include, Low-pressure housing (1); An air intake pipe (13), the air intake pipe (13) being fixedly connected to the low-pressure housing (1); An air filter (2), the air filter (2) being mounted on the low-pressure housing (1), and an exhaust pipe (21) being fixedly connected to the air filter (2); A sealing mechanism (4), the sealing mechanism (4) comprising a rubber strip (44) mounted on the exhaust pipe (21), the rubber strip (44) being used for sealing between the intake pipe (13) and the exhaust pipe (21); A fixing mechanism (3), the fixing mechanism (3) comprising four fixing boxes (303) embedded in the exhaust pipe (21), the inner wall of the fixing box (303) being slidably connected with a clamping block (306), the inner wall of the intake pipe (13) being provided with four clamping grooves (308), the sizes of the clamping blocks (306) and the clamping grooves (308) being compatible; The inner wall of the fixing box (303) is fixedly connected to a fixing plate (304), a spring (305) is fixedly connected to a surface of the fixing plate (304) and the clamping block (306) that are close to each other, a pull rope (309) is slidably passed through the exhaust pipe (21), one end of the pull rope (309) is fixedly connected to the clamping block (306), and the other end of the pull rope (309) is fixedly connected to an iron ring; The clamping groove (308) is adapted to the size of the clamping block (306). When the exhaust pipe (21) is pushed to slide down and enter the intake pipe (13), the clamping block (306) contacts the intake pipe (13) and is squeezed by the intake pipe (13) to shrink. The spring (305) shrinks synchronously under the squeezing of the clamping block (306). When the clamping block (306) reaches the clamping groove (308), the clamping block (306) loses the resistance of the intake pipe (13) and is inserted into the clamping groove (308) under the action of the elastic force of the spring (305), thereby completing the fixing of the air filter (2).

2. A multi-stage screw compressor according to claim 1, characterized in that: The sealing mechanism (4) comprises an annular groove (41) formed on the exhaust pipe (21), a plurality of spikes (42) being fixedly connected to the annular groove (41), a plurality of barbs (43) being fixedly connected to the spikes (42), the tips of the barbs (43) being opposite to the tips of the spikes (42), and the barbs (43) being arranged in an inclined shape, and a rubber strip (44) being wound around the annular groove (41).

3. A multi-stage screw compressor according to claim 1, characterized in that: The fixing mechanism (3) further comprises four positioning rods (301) fixedly connected to the exhaust pipe (21), and the air intake pipe (13) is provided with four positioning holes (302), and the sizes of the positioning rods (301) and the positioning holes (302) are matched.

4. A multi-stage screw compressor according to claim 1, characterized in that: Four sleeve rods (310) are fixedly connected to the exhaust pipe (21), and the sleeve rods (310) are L-shaped.

5. A multi-stage screw compressor according to claim 1, characterized in that: The surface of the clamping block (306) is rotatably connected to a plurality of rotating shafts (307).

6. A multi-stage screw compressor according to claim 1, characterized in that: Six guide blocks (311) are fixedly connected to the inner wall of the fixed box (303), and the six guide blocks (311) are arranged in groups of three. Six guide grooves (313) are formed on the surface of the clamping block (306), and the guide grooves (313) and the guide blocks (311) are slidably connected.

7. A multi-stage screw compressor according to claim 6, characterized in that: A ball (312) is rotatably connected to the surface of the guide block (311), and the ball (312) is a spherical structure.

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