Screw compressor capable of recovering waste heat

Abstract

The utility model discloses a screw compressor for waste heat recovery, which belongs to the technical field of screw compressors and comprises a compressor body, a base is fixedly mounted at the bottom of the compressor body, a support plate is fixedly connected to one side of the base, and a heat exchange box is fixedly mounted at the top of the support plate. The heat exchange box and the heat exchange pipe are used in cooperation, waste heat recovery can be conducted on lubricating oil of the compressor body, the cooled lubricating oil can be input into the compressor body again through the connecting assembly to be reused, impurities carried in the lubricating oil can be filtered through the filter assembly, and the lubricating oil can be recycled. According to the waste heat recovery device, impurities are prevented from entering the heat exchange pipe and blocking the heat exchange pipe, a user can regularly clean the impurities temporarily stored in the cleaning pipe through the cleaning assembly, and through the arrangement of the waste heat recovery device, the waste heat recovery device has the advantage that the impurities carried in lubricating oil can be filtered while waste heat is recovered so as to prevent the heat exchange pipe from being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of screw compressors, in particular to a screw compressor with waste heat recovery. Background Art

[0002] The working process of a screw air compressor is: suction-compression-exhaust process. During the air compression process, the male and female rotors of the compressor need lubricating oil for sealing and cooling. The compressed air contains a large amount of high-temperature lubricating oil. The oil-gas mixture is separated from the oil and air through an oil-gas separator. After separation, the high-temperature lubricating oil needs to be cooled and then re-injected into the rotor cavity and bearings of the compressor for cooling and lubrication. When recovering heat, the lubricating oil needs to pass through a heat exchange tube. Since the lubricating oil contains a large amount of impurities, some impurities will be left inside the heat exchange tube when it passes through the heat exchange tube. After long-term use, the heat exchange tube will be blocked. Therefore, we need to propose a screw compressor with waste heat recovery. Utility Model Content

[0003] The purpose of the utility model is to provide a screw compressor with waste heat recovery, which has the advantage of filtering impurities carried in the lubricating oil while recovering the waste heat to prevent blockage of the heat exchange tube, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides a screw compressor with waste heat recovery, comprising a compressor body, a base fixedly installed at the bottom of the compressor body, a support plate fixedly connected to one side of the base, a heat exchange box fixedly installed on the top of the support plate, a box cover provided on one side of the heat exchange box, the box cover is locked and fixed to one side of the heat exchange box by a locking assembly, a heat exchange tube is provided in the inner cavity of the heat exchange box, one side of the heat exchange tube is connected to a filter assembly for filtering lubricating oil, and a connecting assembly is provided between the compressor body, the heat exchange tube and the filter assembly.

[0005] Preferably, the connecting assembly includes an input pipe and an output pipe connected to one side of the compressor body, one end of the input pipe passes through the heat exchange box and extends to the inner cavity of the heat exchange box and is connected to one end of the heat exchange pipe, and one end of the output pipe passes through the heat exchange box and extends to the inner cavity of the heat exchange box and is connected to one end of the filter assembly.

[0006] Preferably, a support base is fixedly installed on the top of the heat exchange box, and the bottoms of the input pipe and the output pipe are fixedly engaged with the top of the support base.

[0007] Preferably, the filter assembly includes a filter elbow arranged in the inner cavity of the heat exchange box, one end of the filter elbow is connected to one end of the output pipe, and the other end of the filter elbow is connected to one end of the heat exchange pipe. A baffle is also fixedly installed in the inner cavity of the filter elbow, and a cleaning assembly for cleaning filtered impurities is provided at the bottom of the filter elbow.

[0008] Preferably, the cleaning assembly includes a cleaning pipe connected to the bottom of the filter elbow, the bottom end of the cleaning pipe passes through the heat exchange box and the support plate in sequence and extends to the bottom of the support plate, and a control valve is installed on the cleaning pipe and below the support plate.

[0009] Preferably, through holes are provided on the surface of the support plate and the bottom of the heat exchange box at positions corresponding to the cleaning pipes, and the surface of the cleaning pipes fits in contact with the inner walls of the through holes.

[0010] Preferably, the locking assembly includes a first locking plate fixedly installed on both sides of the box cover, and a second locking plate is fixedly installed on both sides of the heat exchange box and at the corresponding position of the first locking plate. A locking rod is threadedly connected to one side of the first locking plate, and one end of the locking rod passes through the first locking plate and is threadedly connected to the surface of the second locking plate.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model can recover the waste heat of the lubricating oil of the compressor body through the coordinated use of the heat exchange box and the heat exchange tube, and can input the cooled lubricating oil into the interior of the compressor body for reuse through the connecting component. The impurities carried in the lubricating oil can be filtered through the setting of the filtering component to prevent the impurities from entering the interior of the heat exchange tube and causing blockage. The user can regularly clean the impurities temporarily stored in the cleaning tube through the cleaning component. The setting of this device has the advantage of filtering the impurities carried in the lubricating oil while recovering the waste heat to prevent the heat exchange tube from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the heat exchange box of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the filter assembly of the utility model;

[0016] Figure 4 This is a schematic cross-sectional view of the filter assembly of the present invention.

[0017] In the figure: 1. Compressor body; 2. Base; 3. Support plate; 4. Heat exchange box; 5. Box cover; 6. Heat exchange tube; 7. Inlet pipe; 8. Outlet pipe; 9. Support seat; 10. Filter elbow; 11. Baffle; 12. Cleaning pipe; 13. Control valve; 14. Through hole; 15. First locking plate; 16. Second locking plate; 17. Locking rod. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-Figure 4 The utility model provides a screw compressor with waste heat recovery, including a compressor body 1, a base 2 is fixedly installed at the bottom of the compressor body 1, a support plate 3 is fixedly connected to one side of the base 2, a heat exchange box 4 is fixedly installed on the top of the support plate 3, and a detachable box cover 5 is provided on one side of the heat exchange box 4. The box cover 5 is locked and fixed to one side of the heat exchange box 4 through a locking assembly. The locking assembly includes a first locking plate 15 fixedly installed on both sides of the box cover 5, and a second locking plate 16 is fixedly installed on both sides of the heat exchange box 4 and at the corresponding position of the first locking plate 15. A locking rod 17 is threadedly connected to one side of the first locking plate 15, and one end of the locking rod 17 passes through the first locking plate 15 and is threadedly connected to the surface of the second locking plate 16.

[0020] The provision of a detachable box cover 5 makes it easy for the user to install, disassemble and inspect the internal structure of the heat exchange box 4. The provision of a locking assembly allows the box cover 5 to be installed and fixed on one side of the heat exchange box 4. During specific installation, the user can place the box cover 5 close to one side of the heat exchange box 4. At this time, the first locking plate 15 and the second locking plate 16 fit together. The user can tighten the locking rod 17 to lock the first locking plate 15 and the second locking plate 16 together, thereby locking and fixing the box cover 5.

[0021] Preferably, the inner cavity of the heat exchange box 4 is provided with a heat exchange pipe 6, and one side of the heat exchange pipe 6 is connected to a filter assembly for filtering the lubricating oil. The filter assembly includes a filter elbow 10 provided in the inner cavity of the heat exchange box 4, one end of the filter elbow 10 is connected to one end of the output pipe 8, and the other end of the filter elbow 10 is connected to one end of the heat exchange pipe 6. The inner cavity of the filter elbow 10 is also fixedly installed with a baffle 11, and a connecting assembly is provided between the compressor body 1 and the heat exchange pipe 6 and the filter assembly. The connecting assembly includes an input pipe 7 and an output pipe 8 connected to one side of the compressor body 1, one end of the input pipe 7 passes through the heat exchange box 4 and extends to the inner cavity of the heat exchange box 4 to be connected to one end of the heat exchange pipe 6, and one end of the output pipe 8 passes through the heat exchange box 4 and extends to the inner cavity of the heat exchange box 4 to be connected to one end of the filter assembly.

[0022] In this embodiment, the heat exchange box 4 and the heat exchange tube 6 are used in conjunction to exchange heat with the lubricating oil of the compressor body 1. During the heat exchange, the lubricating oil will enter the interior of the heat exchange tube 6 through the filter elbow 10. When the lubricating oil passes through the heat exchange elbow, some of the impurities it carries will fall into the interior of the cleaning tube 12 for temporary storage, and some impurities will continue to be carried by the lubricating oil. At this time, the baffle 11 will block some of the impurities, and the impurities will flow along the bottom wall of the filter elbow 10 into the interior of the cleaning tube 12. In this reciprocating cycle, the impurities can be effectively filtered and removed, and the lubricating oil after heat exchange will be input into the interior of the compressor body 1 through the input pipe 7.

[0023] The bottom of the filter elbow 10 is provided with a cleaning assembly for cleaning filtered impurities. The cleaning assembly includes a cleaning pipe 12 connected to the bottom of the filter elbow 10. The bottom end of the cleaning pipe 12 sequentially passes through the heat exchange box 4 and the support plate 3 and extends below the support plate 3. A control valve 13 is installed on the cleaning pipe 12 and below the support plate 3. With the configuration of the cleaning assembly, the user can periodically open the cleaning pipe 12 through the control valve 13 to discharge and clean impurities temporarily stored in the cleaning pipe 12.

[0024] It's worth noting that a support base 9 is fixedly mounted on the top of the heat exchanger box 4, with the bottoms of the inlet and outlet tubes 7 and 8 snapping into place. This support base 9 provides auxiliary support for the inlet and outlet tubes 7 and 8, securing them to the top of the heat exchanger box 4. Through holes 14 are formed on the surface of the support plate 3 and the bottom of the heat exchanger box 4, corresponding to the purge tube 12. The surface of the purge tube 12 mates with the inner wall of the through hole 14, providing space for its installation.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screw compressor with waste heat recovery, comprising a compressor body (1), characterized in that: A base (2) is fixedly mounted on the bottom of the compressor body (1), a support plate (3) is fixedly connected to one side of the base (2), a heat exchange box (4) is fixedly mounted on the top of the support plate (3), a detachable box cover (5) is provided on one side of the heat exchange box (4), and the box cover (5) is locked and fixed to one side of the heat exchange box (4) through a locking assembly, a heat exchange tube (6) is provided in the inner cavity of the heat exchange box (4), and a filter assembly for filtering lubricating oil is connected to one side of the heat exchange tube (6), and a connecting assembly is provided between the compressor body (1), the heat exchange tube (6) and the filter assembly.

2. The screw compressor with waste heat recovery according to claim 1, characterized in that: The connecting assembly comprises an input pipe (7) and an output pipe (8) connected to one side of the compressor body (1); one end of the input pipe (7) passes through the heat exchange box (4) and extends to the inner cavity of the heat exchange box (4) to communicate with one end of the heat exchange pipe (6); one end of the output pipe (8) passes through the heat exchange box (4) and extends to the inner cavity of the heat exchange box (4) to communicate with one end of the filter assembly.

3. The screw compressor with waste heat recovery according to claim 2, characterized in that: A support seat (9) is fixedly mounted on the top of the heat exchange box (4), and the bottoms of the input pipe (7) and the output pipe (8) are fixedly engaged with the top of the support seat (9).

4. The screw compressor with waste heat recovery according to claim 2, characterized in that: The filter assembly comprises a filter elbow (10) arranged in the inner cavity of the heat exchange box (4), one end of the filter elbow (10) is connected to one end of the output pipe (8), and the other end of the filter elbow (10) is connected to one end of the heat exchange pipe (6). A baffle (11) is also fixedly installed in the inner cavity of the filter elbow (10), and a cleaning assembly for cleaning filtered impurities is provided at the bottom of the filter elbow (10).

5. The screw compressor with waste heat recovery according to claim 4, characterized in that: The cleaning assembly comprises a cleaning pipe (12) connected to the bottom of the filter elbow (10), the bottom end of the cleaning pipe (12) sequentially passes through the heat exchange box (4) and the support plate (3) and extends to the bottom of the support plate (3), and a control valve (13) is installed on the cleaning pipe (12) and below the support plate (3).

6. The screw compressor with waste heat recovery according to claim 1, characterized in that: Through holes (14) are provided on the surface of the support plate (3) and the bottom of the heat exchange box (4) at locations corresponding to the cleaning pipe (12), and the surface of the cleaning pipe (12) is in contact with the inner wall of the through hole (14).

7. The screw compressor with waste heat recovery according to claim 1, characterized in that: The locking assembly comprises a first locking plate (15) fixedly mounted on both sides of the box cover (5); a second locking plate (16) is fixedly mounted on both sides of the heat exchange box (4) and at positions corresponding to the first locking plate (15); a locking rod (17) is threadedly connected to one side of the first locking plate (15); one end of the locking rod (17) passes through the first locking plate (15) and is threadedly connected to the surface of the second locking plate (16).

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