Industrial oil fume purification equipment capable of centrally recovering waste oil

Abstract

The invention belongs to the technical field of industrial oil fume, and particularly relates to industrial oil fume purification equipment capable of centrally recovering waste oil, the industrial oil fume purification equipment comprises a shell, the top of the shell is fixedly connected with a cleaning box, and the top of the cleaning box is fixedly connected with a first electric push rod. A filter screen is moved into a cleaning box, then a second electric push rod is started to drive a brush plate to make contact with the filter screen, a conveying pump discharges a solvent in a liquid storage box into a rectangular pipe through a transverse pipe and a hose, then the solvent is sprayed to the filter screen through a spray head, waste oil on the filter screen is dissolved through the solvent, and therefore the waste oil is separated from the filter screen; meanwhile, a first motor is started to drive a moving plate to move through a belt pulley and a belt, a reciprocating screw rod drives the moving plate to move, and the moving plate drives a brush plate to reciprocate up and down through a corresponding second electric push rod to clean a filter screen, so that the phenomenon that meshes of the filter screen are blocked is prevented, and the efficient lampblack purification process can be achieved; meanwhile, the filter screen can be conveniently cleaned, and waste oil can be conveniently collected and treated.

Description

Technical Field

[0001] The invention relates to the technical field of industrial oil fume, in particular to industrial oil fume purification equipment capable of centrally recovering waste oil. Background Art

[0002] Industrial fume waste gas is harmful to human health. It will cause temporary damage and pathological changes to human respiratory, blood, liver and other systems and organs. In addition, industrial fume waste gas will cause serious air pollution. After some substances enter the atmosphere, they will form photochemical smog under certain conditions, causing secondary pollution. Industrial fume is mixed with a large amount of oil mist and grease, which will be wasted if it is directly discharged into the air. It is necessary to recycle the waste oil in the fume.

[0003] China's publicly authorized invention: CN218306846U discloses an industrial oil fume purification device that can recycle waste oil, including a shell, an adjustment plate and a power box. The upper surface of the adjustment plate contacts the bottom surface of the shell. A collection box is provided above the adjustment plate. The bottom surface of the collection box contacts the upper surface of the adjustment plate. Two electric push rods are fixedly connected to the inner wall of the shell. The utility model achieves the purpose of driving the scraper to adjust downward by adjusting the lifting plate downward. By adjusting the scraper downward and cooperating with the socket, the scraper can be extended into the shell to scrape the waste oil on the filter net, so that all the waste oil can be scattered into the collection box, solving the problem that the waste oil is not collected thoroughly and the work progress is slowed down by using an inclined method. By adjusting the adjustment plate downward, the collection box can be extended downward from the inside of the shell to achieve the purpose of removing the waste oil, solving the problem that the recovered waste oil is not convenient to remove after collection.

[0004] However, there are still some problems with the device. In actual use, the industrial fume purification equipment only scrapes the waste oil from the filter by physical methods. The physical scraping method is difficult to reach the tiny filter holes inside the filter, resulting in the waste oil accumulated in the filter holes for a long time cannot be effectively cleaned. This not only reduces the permeability of the filter, but also affects the fume filtration efficiency. Therefore, we propose an industrial fume purification equipment that can centrally recycle waste oil to solve the above problems. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides an industrial oil fume purification device that can centrally recycle waste oil, solving the problems raised in the above background technology.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0009] An industrial oil fume purification device capable of centrally recycling waste oil comprises a shell, a cleaning box is fixedly connected to the top of the shell, a first electric push rod is fixedly connected to the top of the cleaning box, a first sealing plate is fixedly connected to the output end of the first electric push rod, two filter screens are fixedly connected to the bottom of the first sealing plate, a reciprocating screw rod is rotatably connected between the inner walls of both sides of the cleaning box, a moving plate is threadedly connected to the reciprocating screw rod, two second electric push rods are fixedly connected to one side of the moving plate, the output ends of the two second electric push rods on the same side are fixedly connected to the same brush plate, and the brush A rectangular tube is fixedly connected to one side of the plate, a plurality of nozzles are connected and fixed to one side of the rectangular tube, the end of the nozzle extends to the other side of the corresponding brush plate, a hose is connected and fixed to the top of the rectangular tube, a pulley is fixedly connected to the reciprocating screw, the two pulleys are connected to the same belt for transmission, a liquid storage tank is fixedly connected to the top of the shell, a delivery pump is fixedly connected to the top of the liquid storage tank, an input pipe of the delivery pump extends into the liquid storage tank, an output pipe of the delivery pump is connected and fixed to a transverse pipe, and the top end of the hose extends to the outside of the cleaning tank and is connected and fixed to the transverse pipe.

[0010] Furthermore, an L-shaped block is fixedly connected to the top of the cleaning box, and a first motor is fixedly connected to the top inner wall of the L-shaped block. The top end of one of the two reciprocating screws is fixedly connected to the output shaft of the first motor. The rotation of the reciprocating screw and the reciprocating motion of the brush plate can more thoroughly clean the waste oil and impurities on the filter screen.

[0011] Furthermore, a rectangular hole is provided on the bottom inner wall of the cleaning box and the top inner wall of the shell. The rectangular hole is in active contact with the first sealing plate. The close contact between the rectangular hole and the first sealing plate helps to prevent leakage of cleaning liquid or other harmful substances.

[0012] Furthermore, a groove is provided on the inner wall of one side of the rectangular hole, a screw is rotatably connected to the inner wall of one side of the groove, a second sealing plate is threadedly connected to the screw, and the second sealing plate cooperates with the rectangular hole on the shell. The second sealing plate ensures the independence of the cleaning box during the cleaning process and avoids interference and contamination to the interior of the shell caused by leakage of the cleaning liquid.

[0013] Furthermore, a second motor is fixedly connected to the right side of the shell, and an end of the screw rod extends outside the shell and is fixedly connected to an output shaft of the second motor.

[0014] Furthermore, two positioning rods are welded on the right inner wall of the groove, and the positioning rods are slidably connected to the second sealing plate. The positioning rods help prevent the second sealing plate from being offset or stuck during movement.

[0015] Furthermore, four guide rods are welded between the inner walls on both sides of the cleaning box, and the guide rods are slidably connected to the corresponding movable plates. The movable plates help to enhance the structural stability of the movable plates and prevent them from being deformed or damaged due to uneven force during the cleaning process.

[0016] Furthermore, support plates are welded on both side inner walls of the shell, a third electric push rod is fixedly connected to the bottom of the support plate, and an output end of the third electric push rod extends to the bottom of the shell and is fixedly connected to the bottom plate.

[0017] Furthermore, a collection box with an opening at the top is fixedly connected to the top of the base plate, the bottom inner wall of the collection box is in active contact with the bottom of the filter screen, a through hole is opened on the bottom inner wall of the shell, and the shell is slidably connected to the collection box through the through hole.

[0018] Furthermore, a sewage pipe is connected to and fixed to the right side of the cleaning box, an exhaust fan is provided on the right side of the shell, an air intake pipe is connected to and fixed to the left side of the shell, and L-shaped plates are welded to both sides of the shell.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the present invention provides an industrial oil fume purification device that can centrally recycle waste oil, which has the following beneficial effects:

[0021] 1. The present invention first connects the exhaust fan and then the air intake pipe to the pipe for discharging industrial oil smoke. The power provided by the exhaust fan can discharge the industrial oil smoke into the shell through the air intake pipe. When the industrial oil smoke enters the shell, it contacts with the filter. The filter can filter the waste oil and impurities in the industrial oil smoke. The use of multiple filter nets can improve the efficiency of industrial oil smoke purification. The filtered waste oil can be scattered into the collection box. Finally, the filtered industrial oil smoke can be drawn out through the exhaust fan.

[0022] 2. The first electric push rod drives the filter to move upward through the first sealing plate, and moves the filter into the cleaning box. The second motor drives the screw to rotate and drives the second sealing plate to move until the rectangular hole on the shell is completely sealed. At this time, the rectangular hole on the cleaning box has also been sealed by the first sealing plate. The second electric push rod is started to drive the brush plate to contact the filter. The delivery pump discharges the solvent in the storage tank into the rectangular tube through the horizontal pipe and the hose, and then sprays it on the filter through the nozzle. The waste oil on the filter is dissolved by the solvent, thereby separating the waste oil from the filter. At the same time, the first motor is started through the pulley and belt transmission, and the moving plate driven by the reciprocating screw moves. The moving plate drives the brush plate to reciprocate up and down through the corresponding second electric push rod to clean the filter, thereby preventing the mesh of the filter from being blocked, and realizing an efficient oil fume purification process. At the same time, it is convenient to clean the filter and collect and process the waste oil.

[0023] 3. Start the third electric push rod, which drives the bottom plate to move downward, and the bottom plate moves the collection box outside the shell, thereby facilitating the treatment of the waste oil in the collection box. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure on the right side of the present invention;

[0026] Figure 3 This is a schematic diagram of the cutaway three-dimensional structure of the housing and the cleaning box of the present invention;

[0027] Figure 4 For the present invention Figure 3 Schematic diagram of the three-dimensional structure of the middle cleaning box;

[0028] Figure 5 For the present invention Figure 3 Schematic diagram of the three-dimensional structure of the connection between the middle housing, the collection box, the bottom plate and the third electric push rod;

[0029] Figure 6 For the present invention Figure 5 Schematic diagram of the three-dimensional structure of the top of the middle shell;

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure of the reciprocating screw rod, the moving plate, the brush plate and the second electric push rod connected to each other in the present invention;

[0031] Figure 8 It is a schematic diagram of the three-dimensional structure of the brush plate, rectangular tube and nozzle connection of the present invention.

[0032] In the figure: 1. shell; 2. cleaning box; 3. first electric push rod; 4. first sealing plate; 5. filter screen; 6. rectangular hole; 7. groove; 8. screw; 9. second sealing plate; 10. second motor; 11. reciprocating screw; 12. moving plate; 13. second electric push rod; 14. brush plate; 15. rectangular tube; 16. nozzle; 17. hose; 18. pulley; 19. belt; 20. L-shaped block; 21. first motor; 22. liquid storage tank; 23. delivery pump; 24. transverse pipe; 25. positioning rod; 26. guide rod; 27. support plate; 28. third electric push rod; 29. ​​bottom plate; 30. collecting box; 31. drain pipe; 32. exhaust fan; 33. air intake pipe; 34. L-shaped plate. DETAILED DESCRIPTION

[0033] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0034] Example

[0035] like Figure 1-8 As shown, an industrial oil fume purification device capable of centralized recycling of waste oil proposed in one embodiment of the present invention comprises a housing 1, a cleaning box 2 is fixedly connected to the top of the housing 1, a first electric push rod 3 is fixedly connected to the top of the cleaning box 2, a first sealing plate 4 is fixedly connected to the output end of the first electric push rod 3, two filter screens 5 are fixedly connected to the bottom of the first sealing plate 4, a reciprocating screw rod 11 is rotatably connected between the inner walls of both sides of the cleaning box 2, a moving plate 12 is threadedly connected to the reciprocating screw rod 11, two second electric push rods 13 are fixedly connected to one side of the moving plate 12, and the two second electric push rods 13 on the same side are fixedly connected to the two second electric push rods 13. The output end of the housing 1 is fixedly connected to the same brush plate 14, one side of the brush plate 14 is fixedly connected to a rectangular tube 15, one side of the rectangular tube 15 is connected and fixed with a plurality of nozzles 16, the end of the nozzle 16 extends to the other side of the corresponding brush plate 14, the top of the rectangular tube 15 is connected and fixed with a hose 17, the reciprocating screw rod 11 is fixedly connected to a pulley 18, the two pulleys 18 are connected to the same belt 19, the top of the housing 1 is fixedly connected to a liquid storage tank 22, the top of the liquid storage tank 22 is fixedly connected to a delivery pump 23, the input pipe of the delivery pump 23 extends into the liquid storage tank 22, and the delivery pump The output pipe of the housing 23 is connected and fixed with a transverse pipe 24, the top end of the hose 17 extends to the outside of the cleaning box 2 and is connected and fixed to the transverse pipe 24, the first electric push rod 3 drives the filter screen 5 to move upward through the first sealing plate 4, and moves the filter screen 5 into the cleaning box 2, the second motor 10 drives the screw 8 to rotate and drives the second sealing plate 9 to move until the rectangular hole 6 on the housing 1 is completely sealed, at this time, the rectangular hole 6 on the cleaning box 2 has also been sealed by the first sealing plate 4, the second electric push rod 13 is started to drive the brush plate 14 to contact the filter screen 5, and the delivery pump 23 transfers the solvent in the storage tank 22 through the transverse pipe 24 and hose 17 are discharged into the rectangular tube 15, and then sprayed on the filter 5 through the nozzle 16, the waste oil on the filter 5 is dissolved by the solvent, so that the waste oil is separated from the filter 5, and the first motor 21 is started at the same time. The transmission is transmitted through the pulley 18 and the belt 19, and the moving plate 12 driven by the reciprocating screw 11 moves. The moving plate 12 drives the brush plate 14 to reciprocate up and down through the corresponding second electric push rod 13 to clean the filter 5, thereby preventing the mesh of the filter 5 from being blocked, and realizing an efficient oil fume purification process. At the same time, it is convenient to clean the filter 5 and collect the waste oil.

[0036] In some embodiments, an L-shaped block 20 is fixedly connected to the top of the cleaning box 2, and a first motor 21 is fixedly connected to the top inner wall of the L-shaped block 20. The top end of one of the two reciprocating screws 11 is fixedly connected to the output shaft of the first motor 21. The first motor 21 serves as a power source and can drive the reciprocating screw 11 fixedly connected to its output shaft to rotate. The rotation of the reciprocating screw 11 is the key to realizing the up and down reciprocating motion of the brush plate 14, thereby ensuring comprehensive and effective cleaning of the filter 5.

[0037] In some embodiments, a rectangular hole 6 is provided on the bottom inner wall of the cleaning box 2 and the top inner wall of the shell 1. The rectangular hole 6 is in movable contact with the first sealing plate 4. The movable contact design between the rectangular hole 6 and the first sealing plate 4 allows the first sealing plate 4 to seal the rectangular hole 6 when necessary to prevent cleaning liquid or other liquids from leaking out of the cleaning box 2.

[0038] In some embodiments, a groove 7 is opened on the inner wall of one side of the rectangular hole 6, and a screw 8 is rotatably connected to the inner wall of one side of the groove 7. A second sealing plate 9 is threadedly connected to the screw 8. The second sealing plate 9 cooperates with the rectangular hole 6 on the shell 1. By rotating the screw 8, the position of the second sealing plate 9 in the groove 7 can be adjusted, thereby controlling the degree of cooperation between the second sealing plate 9 and the rectangular hole 6.

[0039] In some embodiments, a second motor 10 is fixedly connected to the right side of the housing 1 , and an end of the screw rod 8 extends outside the housing 1 and is fixedly connected to an output shaft of the second motor 10 .

[0040] In some embodiments, two positioning rods 25 are welded on the right inner wall of the groove 7. The positioning rods 25 are slidably connected to the second sealing plate 9. The positioning rods 25 provide a clear sliding path and positioning points for the second sealing plate 9, ensuring that the second sealing plate 9 can maintain the correct direction and position during movement.

[0041] In some embodiments, four guide rods 26 are welded between the inner walls on both sides of the cleaning box 2. The guide rods 26 are slidably connected to the corresponding movable plates 12. The guide rods 26 provide a clear moving path and guide for the movable plates 12, ensuring that the movable plates 12 can move smoothly along a predetermined trajectory during the cleaning process.

[0042] In some embodiments, support plates 27 are welded on the inner walls on both sides of the shell 1, and a third electric push rod 28 is fixedly connected to the bottom of the support plate 27. The output end of the third electric push rod 28 extends to the bottom of the shell 1 and is fixedly connected to a bottom plate 29. The collection box 30 can be moved out of the shell 1 through the third electric push rod 28.

[0043] In some embodiments, a collection box 30 with an opening at the top is fixedly connected to the top of the bottom plate 29, the bottom inner wall of the collection box 30 is in movable contact with the bottom of the filter screen 5, a through hole is opened on the bottom inner wall of the shell 1, and the shell 1 is slidably connected to the collection box 30 through the through hole.

[0044] In some embodiments, a sewage pipe 31 is connected and fixed to the right side of the cleaning box 2, an exhaust fan 32 is provided on the right side of the shell 1, an air intake pipe 33 is connected and fixed to the left side of the shell 1, and L-shaped plates 34 are welded on both sides of the shell 1 to support the entire device.

[0045] Working principle or structural principle, when in use, first connect the exhaust fan 32, and then connect the air inlet pipe 33 with the pipe for discharging industrial oil smoke. The power provided by the exhaust fan 32 can discharge the industrial oil smoke into the shell 1 through the air inlet pipe 33. When the industrial oil smoke enters the shell 1, it contacts the filter 5. The filter 5 can filter the waste oil and impurities in the industrial oil smoke. The use of multiple filter screens 5 can improve the efficiency of industrial oil smoke purification. The filtered waste oil can be scattered into the collection box 30. Finally, the filtered industrial oil smoke can be drawn out through the exhaust fan 32. When the filter screen 5 is blocked, it needs to be cleaned. When cleaning, start the first electric push rod 3, the first electric push rod 3 drives the filter screen 5 to move upward through the first sealing plate 4, and moves the filter screen 5 into the cleaning box 2 for subsequent cleaning. Start the second motor 10, the second motor 10 drives the screw 8 to rotate, the screw 8 is threadedly connected with the second sealing plate 9, and drives the second sealing plate 9 to slide on the positioning rod 25 until the rectangular hole 6 on the housing 1 is completely sealed. At this time, the rectangular hole 6 on the cleaning box 2 has also been sealed by the first sealing plate 4 to ensure that there will be no leakage during the cleaning process. Start the second electric push rod 13, and the second electric push rod 13 drives the corresponding brush plate 14 contacts the filter screen 5 to prepare for cleaning, and then starts the delivery pump 23 to discharge the solvent in the storage tank 22 into the rectangular tube 15 through the horizontal pipe 24 and the hose 17, and then sprays it on the filter screen 5 through the nozzle 16, and the waste oil on the filter screen 5 is dissolved by the solvent, so that the waste oil is separated from the filter screen 5 and discharged through the sewage pipe 31, and the dissolved waste oil is subsequently recovered and processed by external equipment, and the first motor 21 is started at the same time, and the first motor 21 is driven by the pulley 18 and the belt 19, so that the two reciprocating screws 11 rotate at the same time, and the reciprocating screw 11 drives the corresponding moving plate 12 to move , the movable plate 12 slides on the guide rod 26 and drives the brush plate 14 to reciprocate up and down through the corresponding second electric push rod 13 to clean the filter 5, thereby preventing the mesh of the filter 5 from being blocked. After cleaning, the filter 5 is put back into the shell 1, and the exhaust fan 32 is restarted. The equipment can continue to purify the industrial oil fume. When the waste oil in the collection box 30 needs to be taken out, the third electric push rod 28 is started. The third electric push rod 28 drives the bottom plate 29 to move downward, and the bottom plate 29 moves the collection box 30 to the outside of the shell 1, so as to facilitate the treatment of the waste oil in the collection box 30.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An industrial oil fume purification device capable of centrally recovering waste oil, comprising a housing (1), characterized in that: The top of the housing (1) is fixedly connected to a cleaning box (2), the top of the cleaning box (2) is fixedly connected to a first electric push rod (3), the output end of the first electric push rod (3) is fixedly connected to a first sealing plate (4), the bottom of the first sealing plate (4) is fixedly connected to two filter screens (5), a reciprocating screw (11) is rotatably connected between the inner walls of both sides of the cleaning box (2), a moving plate (12) is threadedly connected to the reciprocating screw (11), one side of the moving plate (12) is fixedly connected to two second electric push rods (13), the output ends of the two second electric push rods (13) on the same side are fixedly connected to the same brush plate (14), one side of the brush plate (14) is fixedly connected to a rectangular tube (15), the rectangular tube (15) ) is connected to and fixed with a plurality of nozzles (16) on one side, the ends of the nozzles (16) extend to the other side of the corresponding brush plate (14), the top of the rectangular tube (15) is connected to and fixed with a hose (17), the reciprocating screw (11) is fixedly connected with a pulley (18), the two pulleys (18) are transmission-connected with the same belt (19), the top of the housing (1) is fixedly connected with a liquid storage tank (22), the top of the liquid storage tank (22) is fixedly connected with a delivery pump (23), the input pipe of the delivery pump (23) extends into the liquid storage tank (22), the output pipe of the delivery pump (23) is connected to and fixed with a transverse pipe (24), and the top end of the hose (17) extends to the outside of the cleaning tank (2) and is connected to and fixed with the transverse pipe (24).

2. The industrial oil fume purification equipment capable of centralized waste oil recovery according to claim 1 is characterized in that: An L-shaped block (20) is fixedly connected to the top of the cleaning box (2), a first motor (21) is fixedly connected to the top inner wall of the L-shaped block (20), and the top end of one of the two reciprocating screw rods (11) is fixedly connected to the output shaft of the first motor (21).

3. The industrial oil fume purification equipment capable of centralized waste oil recovery according to claim 1 is characterized in that: A rectangular hole (6) is provided on the bottom inner wall of the cleaning box (2) and the top inner wall of the shell (1), and the rectangular hole (6) is in active contact with the first sealing plate (4).

4. The industrial oil fume purification equipment capable of centralized waste oil recovery according to claim 3 is characterized in that: A groove (7) is provided on the inner wall of one side of the rectangular hole (6), a screw rod (8) is rotatably connected to the inner wall of one side of the groove (7), a second sealing plate (9) is threadedly connected to the screw rod (8), and the second sealing plate (9) matches the rectangular hole (6) on the housing (1).

5. The industrial oil fume purification equipment capable of centralized waste oil recovery according to claim 4 is characterized in that: A second motor (10) is fixedly connected to the right side of the housing (1), and an end of the screw rod (8) extends outside the housing (1) and is fixedly connected to an output shaft of the second motor (10).

6. The industrial oil fume purification equipment capable of centralized waste oil recovery according to claim 5 is characterized in that: Two positioning rods (25) are welded on the right inner wall of the groove (7), and the positioning rods (25) are slidably connected to the second sealing plate (9).

7. The industrial oil fume purification equipment capable of centralized waste oil recovery according to claim 5 is characterized by: Four guide rods (26) are welded between the inner walls on both sides of the cleaning box (2), and the guide rods (26) are slidably connected to the corresponding moving plates (12).

8. The industrial oil fume purification equipment capable of centralized waste oil recovery according to claim 1 is characterized by: Support plates (27) are welded to the inner walls on both sides of the shell (1), a third electric push rod (28) is fixedly connected to the bottom of the support plate (27), and an output end of the third electric push rod (28) extends to the bottom of the shell (1) and is fixedly connected to a bottom plate (29).

9. The industrial oil fume purification equipment capable of centralized waste oil recovery according to claim 8 is characterized in that: A collection box (30) having an opening at the top is fixedly connected to the top of the bottom plate (29); the bottom inner wall of the collection box (30) is in active contact with the bottom of the filter screen (5); a through hole is provided on the bottom inner wall of the shell (1); and the shell (1) is slidably connected to the collection box (30) via the through hole.

10. The industrial oil fume purification equipment capable of centralized waste oil recovery according to claim 1 is characterized in that: The right side of the cleaning box (2) is connected to and fixed with a sewage pipe (31), and the housing (1) An exhaust fan (32) is provided on the right side of the housing (1), and an air intake pipe (33) is connected to and fixed on the left side of the housing (1). L-shaped plates (34) are welded to both sides of the shell (1).

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