Compressor for explosion-proof environment

Abstract

The utility model relates to a compressor for an explosion-proof environment, which comprises a shell and a junction box arranged on the side part of the shell, the junction box comprises a fixed seat arranged on the side part of the shell and a rectangular shell cover detachably arranged on the fixed seat, the fixed seat is provided with a surrounding frame body, and when the rectangular shell cover is arranged on the fixed seat, the rectangular shell cover is arranged on the surrounding frame body. A rectangular filling cavity channel is formed among the surrounding frame body, the rectangular shell cover and the fixing base, and the top of the rectangular shell cover is provided with a first injection opening used for injecting epoxy resin into the rectangular filling cavity channel. Compared with a reference patent, the first epoxy resin filling body is not contacted with the connector lug and the wiring terminal, so that the detachment of the connector lug and the wiring terminal is not influenced, in addition, the adhesion contact area of the first epoxy resin filling body, the fixed seat and the rectangular shell cover is small, the friction force is small, and the service life is prolonged. And the difficulty of separating the fixed seat from the rectangular shell cover is reduced, so that the junction box has an effect of quick disassembly, and the overhaul and maintenance of the wiring part are greatly facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a compressor for explosion-proof environments. Background Art

[0002] An air compressor is a driven fluid machine that elevates low-pressure gas to high-pressure gas. It is the heart of the refrigeration system. It draws in low-temperature, low-pressure refrigerant gas from the intake pipe, compresses it through the piston driven by the motor, and then discharges high-temperature, high-pressure refrigerant gas into the exhaust pipe, providing power for the refrigeration cycle, thereby achieving a refrigeration cycle of compression → condensation (heat release) → expansion → evaporation (heat absorption). As an important form of energy generation, air compressors are widely used in all aspects of life and production. They are also required in some flammable and explosive production workshops. However, due to the presence of dangerous gases or other suspended particulate matter in flammable and explosive production workshops, open flames such as sparks and static electricity are strictly prohibited in the workshops.

[0003] Reference is made to a Chinese patent with authorization publication number CN217898181U, which discloses a compressor for explosion-proof environments. After the wires in the junction box are connected, epoxy resin is filled into the interior of the junction box. The epoxy resin completely wraps the wiring terminals and the wiring heads, so that no electric sparks are generated at the wiring terminals and the wiring heads due to contact with the outside world, greatly increasing the safety of the compressor operation in flammable and explosive production workshops.

[0004] However, in the above-mentioned patent, after epoxy resin is filled into the junction box, the epoxy resin filling body completely wraps the terminal blocks and the terminal heads, making it difficult to remove the terminal blocks and the terminal heads. In addition, the epoxy resin filling body is tightly connected to a large area of ​​the inner wall of the junction box, which is not conducive to the rapid disassembly of the junction box and affects the later inspection and maintenance of the terminal blocks and the terminal heads. Utility Model Content

[0005] The purpose of the present utility model is to provide a compressor for explosion-proof environment, which effectively solves the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned purpose, the present utility model provides the following technical solutions.

[0007] A compressor for explosion-proof environments includes a shell and a terminal box mounted on the side of the shell. The terminal box includes a fixing base mounted on the side of the shell and a rectangular shell cover detachably mounted on the fixing base. The fixing base is provided with a surrounding frame. When the rectangular shell cover is mounted on the fixing base, a rectangular filling cavity is formed between the surrounding frame, the rectangular shell cover and the fixing base. The top of the rectangular shell cover is provided with a first injection port for injecting epoxy resin material into the rectangular filling cavity. After the epoxy resin material is injected into the rectangular filling cavity and cooled and solidified into a first epoxy resin filling body, the first epoxy resin filling body can seal the joint between the rectangular shell cover and the fixing base.

[0008] It can be seen that the sealing between the fixing seat and the rectangular shell cover is achieved by utilizing the surrounding frame to form a rectangular filling cavity between the fixing seat and the rectangular shell cover, and injecting epoxy resin material into the rectangular filling cavity. Compared with the reference patent, the first epoxy resin filling body does not contact the wiring head and the wiring terminal, and thus will not affect the detachment of the wiring head and the wiring terminal. In addition, the adhesion contact area between the first epoxy resin filling body and the fixing seat and the rectangular shell cover is small, and thus the friction force is small, which reduces the difficulty of separating the fixing seat and the rectangular shell cover, thereby making the junction box have the effect of being quickly disassembled, greatly facilitating the inspection and maintenance of the wiring part.

[0009] Furthermore, the surrounding frame body is composed of a first rectangular frame member and a second rectangular frame member, the first rectangular frame member is fixed on the fixing seat, the second rectangular frame member is fixed on the end of the first rectangular frame member, and the four sides of the second rectangular frame member extend from the four sides of the first rectangular frame member accordingly, so that the cross-section of the surrounding frame body has an L-shaped structure.

[0010] Furthermore, when the rectangular shell is mounted on the fixing seat, the end of the rectangular shell is tightly fitted with the surface of the fixing seat, and the four side surfaces of the surrounding frame are tightly fitted with the inner wall of the rectangular shell.

[0011] Furthermore, fixing feet are fixed to the upper and lower sides of the rectangular shell respectively, and fastening screws are inserted into the fixing feet. The fixing seat is provided with fastening screw holes for fastening screws to be screwed into.

[0012] Furthermore, a vertically arranged wire threading tube is installed on the rectangular shell cover, one end of the wire threading tube extends through the rectangular shell cover, and the outer wall of the wire threading tube and the rectangular shell cover are sealed and fixed. The wire threading tube is located on the vertical part outside the rectangular shell cover and is provided with a second injection port that is connected to the inside of the wire threading tube. The second injection port is used to inject epoxy resin material into the wire threading tube.

[0013] Furthermore, the top end surface of the vertical portion of the threading tube located in the rectangular shell is higher than the second injection port, and the threading tube is a transparent tube.

[0014] Furthermore, the outer shell is composed of a semicircular top cover, a cylindrical shell and a base fixedly connected to each other from top to bottom. The fixed base is fixed to the outer side of the cylindrical shell. The outer side of the semicircular top cover has an air outlet interface, and the outer side of the cylindrical shell has an air inlet interface.

[0015] Furthermore, four universal rollers are evenly distributed on the lower surface of the base, and at least one of the universal rollers has a braking effect.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0017] 1. The utility model realizes the sealing between the fixing seat and the rectangular shell cover by using a surrounding frame to form a rectangular filling cavity between the fixing seat and the rectangular shell cover, and injecting epoxy resin material into the rectangular filling cavity. Compared with the reference patent, the first epoxy resin filling body does not contact the wiring head and the wiring terminal, and thus does not affect the detachment of the wiring head and the wiring terminal. In addition, the adhesion contact area between the first epoxy resin filling body and the fixing seat and the rectangular shell cover is small, and thus the friction is small, which reduces the difficulty of separating the fixing seat and the rectangular shell cover, thereby making the junction box have the effect of being quickly disassembled, greatly facilitating the inspection and maintenance of the wiring part.

[0018] 2. When the rectangular shell cover is installed on the fixing seat, the rectangular shell cover is clamped on the second rectangular frame member, and a rectangular filling cavity for epoxy resin molding can be formed between the frame body with an L-shaped cross-section, the rectangular shell cover and the fixing seat. In addition, the end of the rectangular shell cover is tightly fitted with the surface of the fixing seat, and the four side surfaces of the frame body are tightly fitted with the inner wall of the rectangular shell cover, respectively, which can ensure that the rectangular shell cover is tightly connected with the frame body and the fixing seat, and prevent a large amount of epoxy resin material from leaking during injection.

[0019] 3. In the present invention, the wire extends from the wire threading tube to the outside of the rectangular shell. After the wiring is completed and the rectangular shell is installed on the fixed seat, epoxy resin material is injected into the wire threading tube through the second injection port. After the epoxy resin cools, a second epoxy resin filling body is formed in the wire threading tube, which can seal the inside of the wire threading tube to avoid the connection between the inside and the outside of the rectangular shell due to the gap between the wire and the inner wall of the wire threading tube, thereby further preventing the electric sparks generated at the terminal and the terminal head from contacting the outside world, and further improving the safety of the compressor during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the partial structure of the junction box surface in the present utility model;

[0022] Figure 3This is a schematic diagram of the partial structure of the surface of the fixing seat in the utility model;

[0023] Figure 4 This is one of the schematic cross-sectional views of the junction box in the present invention;

[0024] Figure 5 This is the second schematic diagram of the cross-sectional structure of the junction box in the present utility model;

[0025] Figure 6 Schematic diagram of the structural layout for injecting epoxy resin into the junction box.

[0026] In the figure: 1. outer shell; 11. cylindrical shell; 111. air inlet interface; 12. base; 121. universal roller; 13. semicircular top cover; 131. air outlet interface; 2. junction box; 21. fixing seat; 211. first rectangular frame; 212. second rectangular frame; 213. surrounding frame; 214. fastening screw hole; 22. rectangular shell cover; 221. first injection port; 222. fixing foot; 223. fastening screw; 23. rectangular filling cavity; 231. first epoxy resin filling body; 24. threading tube; 241. second injection port; 242. second epoxy resin filling body. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection", and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct connection or an indirect connection through an intermediate medium. Here, "fixed" means that the two are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0029] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0030] See also Figures 1-6 The utility model provides a compressor for explosion-proof environment, including a shell 1 and a terminal box 2 installed on the side of the shell 1. The terminal box 2 includes a fixing base 21 installed on the side of the shell 1 and a rectangular shell cover 22 detachably installed on the fixing base 21. The fixing base 21 has a surrounding frame 213. When the rectangular shell cover 22 is installed on the fixing base 21, a rectangular filling cavity 23 is formed between the surrounding frame 213, the rectangular shell cover 22 and the fixing base 21. The top of the rectangular shell cover 22 has a first injection port 221 for injecting epoxy resin material into the rectangular filling cavity 23. After the epoxy resin material is injected into the rectangular filling cavity 23 and cooled and solidified into a first epoxy resin filling body 231, the first epoxy resin filling body 231 can seal the seam between the rectangular shell cover 22 and the fixing base 21.

[0031] The terminal block is fixed on the fixing base 21. After the wire terminal block is fixedly connected to the terminal block, the rectangular shell cover 22 is fixedly installed on the fixing base 21. At this time, a rectangular filling cavity 23 is formed between the frame body 213 on the fixing base 21 and the fixing base 21 and the rectangular shell cover 22. The epoxy resin material is injected into the rectangular filling cavity 23 through the first injection port 221. After cooling and solidification, a first epoxy resin filling body 231 is formed, which can cover the joint between the rectangular shell cover 22 and the fixing base 21 to achieve sealing, thereby preventing sparks generated at the terminal block and the terminal block from contacting the external air and causing explosion or fire.

[0032] The present invention forms a rectangular filling cavity 23 between the fixing seat 21 and the rectangular shell cover 22 by utilizing the surrounding frame 213, and injects epoxy resin material into the rectangular filling cavity 23 to achieve sealing between the fixing seat 21 and the rectangular shell cover 22. Compared with the reference patent, the first epoxy resin filling body 231 does not contact the wiring head and the wiring terminal, and thus does not affect the detachment of the wiring head and the wiring terminal. In addition, the adhesion contact area between the first epoxy resin filling body 231 and the fixing seat 21 and the rectangular shell cover 22 is small, and thus the friction is small, which reduces the difficulty of separating the fixing seat 21 and the rectangular shell cover 22, thereby making the junction box 2 have the effect of being quickly disassembled, greatly facilitating the inspection and maintenance of the wiring part.

[0033] Specifically, the frame body 213 is composed of a first rectangular frame member 211 and a second rectangular frame member 212. The first rectangular frame member 211 is fixed on the fixing seat 21, and the second rectangular frame member 212 is fixed on the end of the first rectangular frame member 211. The four sides of the second rectangular frame member 212 extend from the four sides of the first rectangular frame member 211, so that the cross-section of the frame body 213 has an L-shaped structure.

[0034] When the rectangular cover 22 is mounted on the fixing seat 21 , the end of the rectangular cover 22 is tightly fitted with the surface of the fixing seat 21 , and the four side surfaces of the surrounding frame 213 are tightly fitted with the inner wall of the rectangular cover 22 .

[0035] When the rectangular shell cover 22 is installed on the fixing seat 21, the rectangular shell cover 22 is clamped on the second rectangular frame 212, and then a rectangular filling cavity 23 for epoxy resin material molding can be formed between the frame body 213 with an L-shaped cross-section and the rectangular shell cover 22 and the fixing seat 21. In addition, the end of the rectangular shell cover 22 is tightly fitted with the surface of the fixing seat 21, and the four side surfaces of the frame body 213 are tightly fitted with the inner wall of the rectangular shell cover 22 respectively, which can ensure that the rectangular shell cover 22 is tightly connected with the frame body 213 and the fixing seat 21, thereby preventing a large amount of epoxy resin material from leaking during injection.

[0036] Specifically, the upper and lower sides of the rectangular shell cover 22 are respectively fixed with fixing feet 222, and fastening screws 223 are inserted into the fixing feet 222. The fixing seat 21 is provided with a fastening screw hole 214 for the fastening screw 223 to be screwed into with a matching thread. By screwing the fastening screw 223 inserted on the fixing foot 222 into the fastening screw hole 214, the rectangular shell cover 22 and the fixing seat 21 can be fixed. In addition, the fastening screw 223 can be unscrewed from the fastening screw hole 214 to remove the rectangular shell cover 22 from the fixing seat 21, thereby achieving the detachable effect of the rectangular shell cover 22.

[0037] Specifically, a vertically arranged wire tube 24 is installed on the rectangular shell 22. One end of the wire tube 24 extends through the rectangular shell 22, and the outer wall of the wire tube 24 is sealed and fixed to the rectangular shell 22. The wire tube 24 is located on the vertical portion outside the rectangular shell 22 and is provided with a second injection port 241 that communicates with the inside of the wire tube 24. The second injection port 241 is used to inject epoxy resin into the wire tube 24. The wire extends from the wire tube 24 to the outside of the rectangular shell 22. After the wiring is completed and After the rectangular shell cover 22 is installed on the fixed seat 21, epoxy resin material is injected into the wire tube 24 through the second injection port 241. After the epoxy resin cools, a second epoxy resin filling body 242 is formed in the wire tube 24, which can seal the inside of the wire tube 24 to avoid the connection between the inside and outside of the rectangular shell cover 22 due to the gap between the wire and the inner wall of the wire tube 24, thereby further preventing the electric sparks generated at the terminal and the terminal head from contacting the outside world, further improving the safety of the compressor during operation.

[0038] Specifically, the threading tube 24 is a transparent tube. The transparent tube can be used to observe the liquid level inside the threading tube 24 when injecting epoxy resin material. The top end surface of the vertical part of the threading tube 24 located in the rectangular shell cover 22 is set higher than the second injection port 241, which can avoid excessive injection of epoxy resin material and overflow into the rectangular shell cover 22 to cause pollution.

[0039] Specifically, the outer shell 1 is composed of a semicircular top cover 13, a cylindrical shell 11 and a base 12 which are fixedly connected to each other from top to bottom. The fixing seat 21 is fixed to the outer side of the cylindrical shell 11. The outer side of the semicircular top cover 13 has an air outlet interface 131, and the outer side of the cylindrical shell 11 has an air inlet interface 111. The air inlet interface 111 is connected to the air inlet of the scroll compressor, and the air outlet interface 131 is connected to the air outlet of the scroll compressor.

[0040] Specifically, four universal rollers 121 are evenly distributed on the lower surface of the base 12, at least one of which has a braking effect. By arranging the universal rollers 121 at the bottom of the base 12, the compressor can be easily transferred as a whole. In addition, at least one universal roller 121 has a braking effect, which can ensure the stability of the compressor during operation.

[0041] In addition, it is worth noting that the other components of the explosion-proof environment compressor provided in this application are consistent with those in the reference patent, and the specific structure and working principle will not be repeated.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A compressor for explosion-proof environment, comprising a housing (1) and a terminal box (2) mounted on the side of the housing (1), characterized in that: The junction box (2) comprises a fixing seat (21) mounted on the side of the housing (1) and a rectangular shell cover (22) detachably mounted on the fixing seat (21); The fixing seat (21) has a surrounding frame (213), and when the rectangular shell (22) is mounted on the fixing seat (21), a rectangular filling cavity (23) is formed between the surrounding frame (213), the rectangular shell (22) and the fixing seat (21); The top of the rectangular shell (22) has a first injection port (221) for injecting epoxy resin material into the rectangular filling cavity (23); After the epoxy resin material is injected into the rectangular filling cavity (23) and cooled and solidified into a first epoxy resin filling body (231), the first epoxy resin filling body (231) can seal the joint between the rectangular shell (22) and the fixing seat (21).

2. The explosion-proof environment compressor according to claim 1, characterized in that: The surrounding frame (213) is composed of a first rectangular frame member (211) and a second rectangular frame member (212), wherein the first rectangular frame member (211) is fixed on the fixing seat (21), and the second rectangular frame member (212) is fixed on an end portion of the first rectangular frame member (211); The four sides of the second rectangular frame (212) extend correspondingly from the four sides of the first rectangular frame (211), so that the cross-section of the surrounding frame body (213) is an L-shaped structure.

3. The compressor for explosion-proof environment according to claim 2, characterized in that: When the rectangular shell (22) is mounted on the fixing seat (21), the end of the rectangular shell (22) is tightly fitted with the surface of the fixing seat (21), and the four side surfaces of the surrounding frame (213) are tightly fitted with the inner wall of the rectangular shell (22).

4. The compressor for explosion-proof environment according to claim 1, characterized in that: The upper and lower sides of the rectangular shell (22) are respectively fixed with fixing feet (222), and the fixing feet (222) are inserted with fastening screws (223); The fixing seat (21) is provided with a fastening screw hole (214) for the fastening screw (223) to be screwed into with matching threads.

5. The compressor for explosion-proof environment according to claim 1, characterized in that: A vertically arranged threading tube (24) is installed on the rectangular shell (22), one end of the threading tube (24) extends through the rectangular shell (22), and the outer wall of the threading tube (24) and the rectangular shell (22) are sealed and fixed; The threading tube (24) is provided with a second injection port (241) on a vertical portion located outside the rectangular shell (22), which is communicated with the interior of the threading tube (24). The second injection port (241) is used to inject epoxy resin material into the threading tube (24).

6. The compressor for explosion-proof environment according to claim 5, characterized in that: The top end surface of the vertical portion of the threading tube (24) located in the rectangular shell (22) is arranged higher than the second injection port (241); The threading tube (24) is a transparent tube.

7. The compressor for explosion-proof environment according to claim 1, characterized in that: The housing (1) is composed of a semicircular top cover (13), a cylindrical shell (11) and a base (12) which are fixedly connected to each other from top to bottom; The fixing seat (21) is fixed to the outer side of the cylindrical shell (11); The outer side of the semicircular top cover (13) has an air outlet interface (131), and the outer side of the cylindrical shell (11) has an air inlet interface (111).

8. The compressor for explosion-proof environment according to claim 7, characterized in that: Four universal rollers (121) are evenly distributed on the lower surface of the base (12), at least one of the universal rollers (121) having a braking effect.

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