Equipment for automatically cleaning Western Blot glass plate

Abstract

The utility model relates to the technical field of experimental equipment, and provides equipment for automatically cleaning a Western Blot glass plate, which comprises a cleaning cabin, a drawing groove is arranged at the edge of the end surface of one side of the cleaning cabin, the drawing groove is communicated with the inner side of the cleaning cabin, a movable tray is movably inserted into the inner side of the drawing groove, a placing groove is arranged on the top surface of the movable tray, and the placing groove is communicated with the drawing groove. A liquid storage tank is fixed to the edge of the top face of the cleaning bin, a first liquid guide pipe is fixed to the edge of one side wall of the liquid storage tank and communicates with the inner side of the liquid storage tank, a first water pump is fixed to one end of the first liquid guide pipe, a second liquid guide pipe is fixed to the middle of one side wall of the first water pump, and a filter is fixed to one end of the second liquid guide pipe. The glass plate cleaning device can automatically clean a glass plate in the whole process, ensures the cleanness of cleaning water, standardizes the cleaning process, has the functions of air drying, pollution discharge and the like after cleaning, and is beneficial to reducing manual operation, relieving the burden of workers and keeping an efficient cleaning effect.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental equipment, in particular to a device for automatically cleaning a Western Blot glass plate. Background Art

[0002] Western blot analysis is a commonly used technique in biological experiments for detecting specific proteins. Multiple glass plates are used during the experiment, and these plates require thorough cleaning after use to remove residual gels, proteins, detection reagents, and other substances. Traditional cleaning methods are usually performed manually, which is not only time-consuming and labor-intensive, but also varies greatly depending on the operator's skill and experience. Inexperienced operators can even break the plates, making it difficult to ensure cleaning quality and reproducibility, and resulting in certain losses.

[0003] Therefore, there is a need for an automatic cleaning device for Western Blot glass plates that can complete the cleaning process efficiently, quickly and in a standardized manner, reduce manual operations, improve cleaning effects and experimental repeatability, and reduce economic losses. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes a device for automatically cleaning Western Blot glass plates, which has the characteristics of automatic cleaning, high efficiency and good effect.

[0005] In order to achieve the above objectives, the present invention proposes the following specific solutions:

[0006] A device for automatically cleaning Western Blot glass plates, comprising a cleaning cabin, a drawing groove is provided on the edge of one end surface of the cleaning cabin, the drawing groove is connected to the inner side of the cleaning cabin, a movable tray is movably connected to the inner side of the drawing groove, a placement groove is provided on the top surface of the movable tray, a leakage hole is provided on the inner bottom surface of the placement groove, a liquid storage tank is fixed on the edge of the top surface of the cleaning cabin, a first liquid guide tube is fixed on the edge of one side wall of the liquid storage tank, the first liquid guide tube is connected to the inner side of the liquid storage tank, a first water pump is fixed at one end of the first liquid guide tube, a second liquid guide tube is fixed in the middle of one side wall of the first water pump, a filter is fixed at one end of the second liquid guide tube, the filter is fixed on the top surface of the cleaning cabin, a water inlet pipe is fixed in the middle of one side wall of the filter, and the other side wall of the liquid storage tank A connecting elbow is fixed in the middle, and the connecting elbow is connected to the inner side of the liquid storage tank. A second water pump is fixed to the lower end of the connecting elbow, and the second water pump is fixed to the outer wall of the cleaning cabin. A telescopic hose is fixed in the middle of one side wall of the second water pump, and the telescopic hose passes through the side wall of the cleaning cabin. A flusher is fixed at one end of the telescopic hose, and the flusher is located inside the cleaning cabin and above the movable pallet. An arc-shaped groove is provided on the bottom surface of the flusher, and a water spray hole is provided on the inner wall of the arc-shaped groove. The water spray hole is connected to the inner side of the flusher. A rectangular threaded barrel is fixed in the middle of the top surface of the flusher, and a rotating screw is threadedly connected to the inner side of the rectangular threaded barrel. A motor is fixed to one end of the rotating screw, and one end of the motor is fixed to the inner wall of the cleaning cabin.

[0007] As a preferred technical solution of an equipment for automatically cleaning Western Blot glass plates of the utility model, an exhaust hole is provided on one side wall of the cleaning cabin, and the exhaust hole is located below the telescopic hose. An air suction port is fixed on the inner wall of one side of the cleaning cabin, and the air suction port is connected to the exhaust hole. A fan is fixed on the edge of the outer wall on the other side of the cleaning cabin, and an air supply elbow is fixed in the middle of the top surface of the fan, and the upper end of the air supply elbow is fixed on the outer wall of the cleaning cabin. An air inlet groove is provided on the inner side of the other side wall of the cleaning cabin, and the air inlet groove is connected to the air supply elbow. An air outlet is fixed on the inner wall of the other side of the cleaning cabin, and the air outlet is connected to the air inlet groove. The air outlet is located above the movable tray.

[0008] As an optimal technical solution for an apparatus for automatically cleaning Western Blot glass plates according to the present invention, a waste liquid tank is provided in the middle of the inner bottom surface of the cleaning chamber, the waste liquid tank is located below the movable tray, and a waste liquid pipe is fixed to the edge of the outer wall of one side of the cleaning chamber, the waste liquid pipe is connected to the inner side of the waste liquid tank.

[0009] As a preferred technical solution of the device for automatically cleaning Western Blot glass plates of the utility model, a liquid injection cylinder is fixed to the middle of the top surface of the liquid storage tank, and the liquid injection cylinder is connected to the inner side of the liquid storage tank.

[0010] As an optimal technical solution for an apparatus for automatically cleaning Western Blot glass plates of the present invention, a limit groove is provided in the middle of the inner top surface of the cleaning chamber, a limit block is fixed in the middle of the top surface of the rectangular threaded cylinder, and the limit block is movably inserted into the inner side of the limit groove.

[0011] As a preferred technical solution of the device for automatically cleaning Western Blot glass plates of the utility model, a fixed cylinder is movably sleeved on the outer side of the other end of the rotating screw, and one end of the fixed cylinder is fixed to the inner wall of the cleaning chamber.

[0012] As an optimal technical solution for an apparatus for automatically cleaning Western Blot glass plates according to the present invention, a controller is fixed to an end face of one side of the cleaning chamber, the controller is located above the movable tray, a handle is fixed to the middle of an outer wall of one side of the movable tray, and a support leg is fixed to the edge of the bottom surface of the cleaning chamber.

[0013] As a preferred technical solution of the equipment for automatically cleaning Western Blot glass plates of the utility model, a plurality of the placement grooves, water spray holes and exhaust holes are provided.

[0014] Compared with the existing technology, the utility model has the following beneficial effects:

[0015] The utility model places the glass plate in the placement groove on the movable tray, and drives the rotating screw to rotate through the motor, driving the rinser to move back and forth to rinse the glass plate. The multiple water spray holes on the inner wall of the arc-shaped groove on the bottom of the rinser can ensure that the glass plate is fully cleaned. The water used for cleaning is filtered through the filter to ensure its cleanliness. This solution can be operated automatically, reduce manpower requirements, improve cleaning efficiency, standardize the cleaning process, and improve cleaning quality and experimental repeatability.

[0016] The utility model integrates the function of a waste liquid tank in the cleaning cabin. The sewage generated by cleaning falls into the waste liquid tank below through the leakage hole on the bottom surface of the tank and is discharged through the waste liquid pipe, which avoids the sewage from accumulating inside the cleaning cabin and causing pollution, thereby ensuring the cleaning effect.

[0017] The utility model uses a fan to supply air. After cleaning is completed, the fan blows air to the inside of the cleaning chamber through the air supply elbow, the air inlet slot and the air outlet, so that the cleaned glass plate is quickly air-dried and can be used again after air drying. Compared with manual cleaning which requires wiping or drying, the utility model greatly saves manpower and time. After the blown-in air takes away the water stains on the glass plate, the moist air is discharged from the inside of the cleaning chamber through the air suction port and the exhaust hole, forming an internal and external wind circulation, which accelerates the drying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to better describe the technical solution of the present invention in detail, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a three-dimensional diagram of the overall structure provided by the utility model;

[0020] Figure 2 It is a three-dimensional cross-sectional view of the utility model;

[0021] Figure 3 A three-dimensional diagram of the mobile tray of the present invention;

[0022] Figure 4 For this utility model Figure 2 A magnified schematic diagram of point A in the middle;

[0023] Figure 5 For this utility model Figure 2 Enlarged schematic diagram of point B in the middle

[0024] Figure 6 For this utility model Figure 2 The enlarged schematic diagram of point C in the middle;

[0025] Figure 7 For this utility model Figure 2 Enlarged schematic diagram of point D in the middle.

[0026] In the figure: 1. Cleaning cabin; 11. Drawing slot; 12. Waste liquid slot; 13. Waste liquid pipe; 14. Limiting slot; 15. Rotating screw; 151. Motor; 152. Fixed cylinder; 16. Air inlet slot; 17. Air outlet; 18. Exhaust hole; 19. Air suction port; 2. Moving tray; 21. Handle; 22. Placement slot; 221. Leakage hole; 3. Liquid storage tank; 31. Liquid injection cylinder; 32. First liquid guide pipe; 33. First water pump; 331. Second liquid guide pipe; 34. Filter; 341. Water inlet pipe; 35. Connecting elbow; 36. Second water pump; 361. Telescopic hose; 37. Rinse; 371. Arc slot; 372. Water spray hole; 373. Rectangular threaded cylinder; 374. Limiting block; 4. Fan; 41. Air supply elbow; 5. Support leg; 6. Controller DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying 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] Example

[0029] See also Figure 1-7 As shown, the utility model provides the following technical solutions: a device for automatically cleaning Western Blot glass plates, comprising a cleaning chamber 1, with legs 5 fixed to the bottom edge of the cleaning chamber 1. This solution uses the legs 5 to support the cleaning chamber 1, raising the height of the waste liquid pipe 13 to facilitate the discharge of sewage.

[0030] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7As shown, specifically, a drawing groove 11 is provided on the edge of the end face of one side of the cleaning cabin 1 for pushing in and pulling out the mobile tray 2, and the drawing groove 11 is connected to the inner side of the cleaning cabin 1, and a mobile tray 2 is movably connected to the inner side of the drawing groove 11 for carrying the glass plate to be cleaned, and a placement groove 22 is provided on the top surface of the mobile tray 2 for placing the glass plate to be cleaned, and a leakage hole 221 is provided on the inner bottom surface of the placement groove 22, and the sewage generated by cleaning falls into the inner side of the waste liquid tank 12 from the leakage hole 221. There are multiple placement grooves 22, water spray holes 372 and exhaust holes 18, and a handle 21 is fixed in the middle of the outer wall of one side of the mobile tray 2 to facilitate pulling the mobile tray 2. A liquid storage tank 3 is fixed on the edge of the top surface of the cleaning cabin 1 for mixing water and cleaning agent. There is a liquid injection cylinder 31, through which cleaning agent is added to the inner side of the liquid storage tank 3. The liquid injection cylinder 31 is connected to the inner side of the liquid storage tank 3. A first liquid guide tube 32 is fixed to the edge of one side wall of the liquid storage tank 3, which is used for a first water pump 33 to inject water into the inner side of the liquid storage tank 3. The first liquid guide tube 32 is connected to the inner side of the liquid storage tank 3. A first water pump 33 is fixed to one end of the first liquid guide tube 32 (the first water pump 33 and the second water pump 36 are both existing technologies. The specific operation mode and principle can refer to the electric water pump in the existing technology. The opening and closing are controlled by the controller 6, so they are not described in detail here). The first water pump 33 pumps water filtered by the filter 34 into the inner side of the liquid storage tank 3. A second liquid guide tube 331 is fixed to the middle of one side wall of the first water pump 33, which is used to pump water from the filter 34. A filter 34 is fixed to one end of the second liquid guide pipe 331 (the filter 34 is a prior art, and its specific operation mode and principle can refer to the tap water purifier in the prior art, so it is not described in detail here). The filter 34 can filter impurities in the water to ensure the purity of the cleaning water quality. The filter 34 is fixed on the top surface of the cleaning cabin 1, and a water inlet pipe 341 is fixed in the middle of one side wall of the filter 34, which is used to introduce water flow into the inner side of the filter 34. A connecting elbow 35 is fixed in the middle of the other side wall of the liquid storage tank 3. The second water pump 36 draws out the cleaning liquid in the liquid storage tank 3 through the connecting elbow 35. The connecting elbow 35 is connected to the inside of the liquid storage tank 3. A second water pump 36 is fixed to the lower end of the connecting elbow 35 for supplying cleaning liquid to the flusher 37. The second water pump 36 is fixed to the Fixed on the outer wall of the cleaning cabin 1, a telescopic hose 361 is fixed in the middle of one side wall of the second water pump 36. The telescopic hose 361 can be extended or bent according to the movement of the washer 37 to ensure continuous water supply to the washer 37. The telescopic hose 361 passes through the side wall of the cleaning cabin 1. A washer 37 is fixed at one end of the telescopic hose 361. The washer 37 is located inside the cleaning cabin 1 and above the movable tray 2. It can rinse and clean the glass plate. An arc groove 371 is provided on the bottom surface of the washer 37 for controlling the direction of the water spray hole 372 to ensure comprehensive cleaning of the glass plate. A water spray hole 372 is provided on the inner wall of the arc groove 371. The water spray hole 372 is connected to the inner side of the washer 37. Multiple water spray holes 372 spray cleaning liquid to rinse the glass plate.A rectangular threaded cylinder 373 is fixed to the middle of the top surface of the washer 37, which is used to connect the washer 37 with the rotating screw 15. The inner side of the rectangular threaded cylinder 373 is threadedly connected to the rotating screw 15. The rotating screw 15 enables the washer 37 to move by rotation. A motor 151 is fixed to one end of the rotating screw 15 (the motor 151 is a prior art. The specific operation mode and principle can refer to the bidirectional motor in the prior art. The opening and closing are controlled by the controller 6, so it is not described in detail here). The motor 151 can drive the rotating screw 15 to rotate. One end of the motor 151 is fixed to the inner wall of the cleaning cabin 1, and the outer side of the other end of the rotating screw 15 is movably connected to a fixed cylinder 152. One end of the fixed cylinder 152 is fixed to the inner wall of the cleaning cabin 1 to support the end of the rotating screw 15 for cleaning. A limit groove 14 is provided in the middle of the inner top surface of the chamber 1 for the movement of the limit block 374 therein. A limit block 374 is fixed in the middle of the top surface of the rectangular threaded cylinder 373. The limit block 374 can prevent the rinser 37 from rotating with the rotating screw 15. The limit block 374 is movably inserted into the inner side of the limit groove 14. A controller 6 is fixed to the end surface of one side of the cleaning chamber 1 (the controller 6 is conventional. The specific operation mode and principle can refer to the microprogram controller in the conventional technology. It is opened and closed by an external power supply, so it is not described in detail here). The controller 6 is located above the movable tray 2. The controller 6 is used to control the operation of the motor 151, the fan 4, the first water pump 33 and the second water pump 36. This solution can automatically clean the glass plate, standardize the process, save manpower, and improve efficiency.

[0031] Reference Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, specifically, one side wall of the cleaning cabin 1 is provided with an exhaust hole 18 for discharging the wind inside the cleaning cabin 1. The exhaust hole 18 is located below the telescopic hose 361. An air suction port 19 is fixed to the inner wall of one side of the cleaning cabin 1 for conveying the wind to be discharged to the exhaust hole 18. The air suction port 19 is connected to the exhaust hole 18. A fan 4 is fixed to the edge of the outer wall on the other side of the cleaning cabin 1 (the fan 4 is a prior art, and the specific operation mode and principle can refer to the electric blower in the prior art. It is controlled to start and stop by the controller 6, so it is not described in detail here). The fan 4 can blow air into the inside of the cleaning cabin 1 to dry the glass plate. An air supply elbow 41 is fixed to the inside of the fan 4, which is used to transport the air from the fan 4 to the inner side of the air inlet slot 16. The upper end of the air supply elbow 41 is fixed to the outer wall of the cleaning cabin 1, and an air inlet slot 16 is provided on the inner side of the other side wall of the cleaning cabin 1, which is used to transport air to the air outlet 17. The air inlet slot 16 is connected with the air supply elbow 41, and an air outlet 17 is fixed to the inner wall on the other side of the cleaning cabin 1. The air blown out of the air outlet 17 is used to dry the glass plate. The air outlet 17 is connected with the air inlet slot 16, and the air outlet 17 is located above the movable tray 2. This solution can automatically dry the glass plate after cleaning, eliminating the steps of manual wiping or natural drying, and can improve efficiency.

[0032] Reference Figure 1 and Figure 2 As shown, specifically, a waste liquid tank 12 is provided in the middle of the inner bottom surface of the cleaning cabin 1 for storing sewage generated by cleaning. The waste liquid tank 12 is located below the movable tray 2, and a waste liquid pipe 13 is fixed to the edge of the outer wall of one side of the cleaning cabin 1. The waste liquid pipe 13 is connected to the inner side of the waste liquid tank 12 and can discharge sewage. This solution can discharge sewage simultaneously during the cleaning process, avoid sewage accumulation inside the cleaning cabin 1, and cause pollution to the glass plate, thereby improving the cleaning effect.

[0033] The working principle and use process of this utility model:

[0034] When in use, the movable tray 2 is pulled out, the glass plate is placed inside the placement groove 22, and then the movable tray 2 is pushed into the inside of the cleaning cabin 1, and then the first water pump 33 is started, and water is pumped into the inside of the filter 34 through the water inlet pipe 341 for filtration, and then the filtered water is pumped into the inside of the liquid storage tank 3, and the cleaning agent is added through the injection cylinder 31 on the top of the liquid storage tank 3, and then the cleaning liquid is transported to the inside of the washer 37 through the telescopic hose 361 by the second water pump 36, and sprayed out through the water spray hole 372 on the washer 37 to achieve flushing and cleaning of the glass plate. At the same time, the controller 6 is controlled The braking motor 151 drives the rotating screw 15 to rotate forward and reverse, so that the rinser 37 can move back and forth on the rotating screw 15. During the movement, the telescopic hose 361 expands and contracts and bends accordingly, thereby achieving the flushing of multiple glass plates (the flushing liquid can be collected to the inner side of the waste liquid tank 12 through the leakage hole 221 and discharged through the waste liquid pipe 13). After the cleaning is completed, the fan 4 can be started. The fan 4 transports the external air through the air supply bend 41 to the inner side of the air inlet groove 16, and then enters the inner side of the cleaning chamber 1 through the air outlet 17 to achieve the drying of the glass (the air intake 19 and the exhaust hole 18 are used to discharge the air).

[0035] Finally, it should be noted that the above description is merely 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 will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An apparatus for automatically cleaning Western Blot glass plates, comprising a cleaning chamber (1), characterized in that: The cleaning chamber (1) is provided with a drawing groove (11) on the edge of one end face, the drawing groove (11) is connected to the inner side of the cleaning chamber (1), a movable tray (2) is movably connected to the inner side of the drawing groove (11), the top surface of the movable tray (2) is provided with a placement groove (22), the inner bottom surface of the placement groove (22) is provided with a leakage hole (221), a liquid storage tank (3) is fixed on the edge of the top surface of the cleaning chamber (1), a first liquid guide tube (32) is fixed on the edge of one side wall of the liquid storage tank (3), and the first liquid guide tube (32) The first liquid guide tube (32) is connected to the inner side of the liquid storage tank (3), and a first water pump (33) is fixed to one end of the first liquid guide tube (32). A second liquid guide tube (331) is fixed to the middle of one side wall of the first water pump (33). A filter (34) is fixed to one end of the second liquid guide tube (331). The filter (34) is fixed on the top surface of the cleaning cabin (1). A water inlet pipe (341) is fixed to the middle of one side wall of the filter (34). A connecting elbow (35) is fixed to the middle of the other side wall of the liquid storage tank (3). The connecting elbow (35) is fixed to the middle of the other side wall of the liquid storage tank (3). 5) is connected to the inner side of the liquid storage tank (3), a second water pump (36) is fixed to the lower end of the connecting elbow (35), the second water pump (36) is fixed to the outer wall of the cleaning cabin (1), a telescopic hose (361) is fixed to the middle of one side wall of the second water pump (36), the telescopic hose (361) passes through the side wall of the cleaning cabin (1), a flusher (37) is fixed to one end of the telescopic hose (361), the flusher (37) is located inside the cleaning cabin (1), and the flusher (37) is located on the movable tray (2) Above, the bottom surface of the washer (37) is provided with an arc-shaped groove (371), the inner wall of the arc-shaped groove (371) is provided with a water spray hole (372), and the water spray hole (372) is connected to the inner side of the washer (37). A rectangular threaded barrel (373) is fixed to the middle of the top surface of the washer (37), and a rotating screw (15) is threadedly connected to the inner side of the rectangular threaded barrel (373). One end of the rotating screw (15) is fixed with a motor (151), and one end of the motor (151) is fixed to the inner wall of the cleaning chamber (1).

2. The device for automatically cleaning a Western Blot glass plate according to claim 1, wherein: An exhaust hole (18) is provided on one side wall of the cleaning cabin (1), and the exhaust hole (18) is located below the telescopic hose (361). An air suction port (19) is fixed on the inner wall of one side of the cleaning cabin (1), and the air suction port (19) is connected to the exhaust hole (18). A fan (4) is fixed on the edge of the outer wall of the other side of the cleaning cabin (1), and an air supply bend (41) is fixed on the middle part of the top surface of the fan (4). The upper end of the air supply bend (41) is fixed on the outer wall of the cleaning cabin (1). An air inlet groove (16) is provided on the inner side of the other side wall of the cleaning cabin (1), and the air inlet groove (16) is connected to the air supply bend (41). An air outlet (17) is fixed on the inner wall of the other side of the cleaning cabin (1), and the air outlet (17) is connected to the air inlet groove (16). The air outlet (17) is located above the movable tray (2).

3. The device for automatically cleaning a Western Blot glass plate according to claim 2, wherein: A waste liquid tank (12) is provided in the middle of the inner bottom surface of the cleaning chamber (1), and the waste liquid tank (12) is located below the movable tray (2). A waste liquid pipe (13) is fixed to the edge of the outer wall of one side of the cleaning chamber (1), and the waste liquid pipe (13) is connected to the inner side of the waste liquid tank (12).

4. The device for automatically cleaning a Western Blot glass plate according to claim 3, wherein: A liquid injection cylinder (31) is fixed in the middle of the top surface of the liquid storage box (3), and the liquid injection cylinder (31) is connected to the inner side of the liquid storage box (3).

5. The device for automatically cleaning a Western Blot glass plate according to claim 4, wherein: A limiting groove (14) is provided in the middle of the inner top surface of the cleaning chamber (1), and a limiting block (374) is fixed in the middle of the top surface of the rectangular threaded cylinder (373), and the limiting block (374) is movably inserted into the inner side of the limiting groove (14).

6. The device for automatically cleaning a Western Blot glass plate according to claim 5, wherein: A fixed cylinder (152) is movably sleeved on the outer side of the other end of the rotating screw (15), and one end of the fixed cylinder (152) is fixed on the inner wall of the cleaning chamber (1).

7. The device for automatically cleaning a Western Blot glass plate according to claim 6, wherein: A controller (6) is fixed to one end face of the cleaning chamber (1), and the controller (6) is located above the movable tray (2). A handle (21) is fixed to the middle of the outer wall of one side of the movable tray (2), and a support leg (5) is fixed to the edge of the bottom face of the cleaning chamber (1).

8. The device for automatically cleaning a Western Blot glass plate according to claim 7, wherein: The placement groove (22), the water spray hole (372) and the exhaust hole (18) are all provided in plurality.

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