Cooling device of air compressor

Abstract

The utility model belongs to the technical field of air compressors, and particularly relates to a cooling device of an air compressor, which comprises an air cooling box of a hollow structure. The air cooling mechanism is arranged, external air is sucked into the inner cavity of the air cooling box through the air inlet fan, cooling is conducted through the multiple nozzles in the process, air entering the inner cavity of the air cooling box is cold air, and therefore the cooling effect is improved, a complete air channel is formed through cooperation with the air outlet fan, and the cooling effect is improved. By means of the air cooling mechanism, high-temperature air in an inner cavity of the air cooling box can be rapidly cooled, it is guaranteed that high-temperature air generated by the air compressor can be preliminarily cooled, and the situation that when the high-temperature air is directly cooled by water, an air supply pipeline bursts due to the large temperature difference is avoided; and gas in the S-shaped pipe is rapidly cooled through mist water drops, and the cooling effect of the device is improved through spraying type cooling treatment.

Description

Technical Field

[0001] The utility model belongs to the technical field of air compressors, and in particular relates to a cooling device for an air compressor. Background Art

[0002] Air compressor is also called air compressor. Air compressor is a device used to compress gas. Air compressor is similar to water pump in structure. Most air compressors are reciprocating piston type, rotary blade or rotary screw. Centrifugal compressor is a very large application. Air compressor oil is a liquid lubricant used in various types of machinery to reduce friction and protect machinery and processed parts. It mainly plays the role of lubrication, cooling, rust prevention, cleaning, sealing and buffering.

[0003] After the air is compressed during the operation of the air compressor, the air will heat up and become high-temperature gas. In order to quickly cool down the compressed high-temperature gas, a cooling device is urgently needed to cool it down.

[0004] For example, a Chinese patent with publication number CN115750285A discloses a high-temperature gas cooling device for an air compressor, which relates to the technical field of air compressors, including an air compressor and a cooling mechanism, wherein a curved connecting pipe is connected to the outlet end of the air compressor, and the cooling mechanism consists of a cooling placement box, water inlet and outlet components, a water circulation component, a cooling component and an isolation component, wherein two groups of isolation components are provided, and the pipe body of the curved connecting pipe is located in the cooling placement box, and the water inlet and outlet components, the water circulation component, the cooling component and the two groups of isolation components are all located in the cooling placement box, and the water inlet and outlet components are connected to the water circulation component, and the two groups of isolation components correspond to the curved connecting pipe, and the water inlet and outlet components also correspond to the cooling component and the two groups of isolation components respectively; in order to solve the problem that the cooling method in the prior art will cause the curved pipe to be in contact with water for a long time, which will cause corrosion and scaling of the curved pipe body, thereby causing bacterial growth, thus seriously reducing the service life of the curved pipe.

[0005] This patent has some shortcomings when used, such as: the device in this patent cools the clean water for a long time through a cooler to reduce the water temperature. When cooling the high-temperature gas for a long time, the temperature increase rate of the clean water is very likely to be greater than its decrease rate, which reduces the efficiency of the device in treating the high-temperature gas. In addition, the device in this patent has a relatively single cooling method for the high-temperature gas, and the overall cooling efficiency is low and time-consuming, which is not conducive to the long-term operation of the air compressor. In view of this, we propose a cooling device for an air compressor. Utility Model Content

[0006] The purpose of the utility model is to provide a cooling device for an air compressor to solve the problems raised in the above background technology.

[0007] In view of this, the utility model provides a cooling device for an air compressor, comprising:

[0008] An air-cooled box, wherein the air-cooled box is an internal hollow structure, and vents are symmetrically provided on the left and right sides of the air-cooled box, a water-cooled box is fixedly installed on the right side of the air-cooled box, an air collecting chamber is provided in the inner cavity of the air-cooled box, support frames are symmetrically fixed on the front and rear sides of the water-cooled box, and the bottom ends of the support frames are fixed to the bottom surface of the inner cavity of the air-cooled box, a radiator is installed on the upper surface of the air collecting chamber, a shunt pipe is provided on the front side of the air collecting chamber, and the air inlet end of the shunt pipe passes through the inner wall of the air-cooled box and extends to the outside, an air supply pipe is provided on the rear side of the air collecting chamber, and one end of the air supply pipe passes through the inner wall of the air-cooled box and extends to the inner cavity of the water-cooled box;

[0009] An air cooling mechanism is installed at the two vents and is used to cool the heat accumulated on the two radiators;

[0010] An S-shaped tube, wherein the S-shaped tube is in a coiled S-shaped structure, the S-shaped tube is arranged in the inner cavity of the water cooling box, and the air inlet end of the S-shaped tube is connected to the air delivery pipe, and the air outlet end of the S-shaped tube penetrates the inner wall of the water cooling box and extends to the outside;

[0011] The water cooling mechanism is arranged just above the S-shaped tube and is used for secondary cooling of the high-temperature gas in the S-shaped tube.

[0012] In the above technical solution, further, the air cooling mechanism includes:

[0013] A fixed frame is installed in the inner cavity of the air cooling box and close to the right vent. Two groups of air intake fans are installed side by side in the fixed frame. An air collecting box is fixed on the inner side of the air intake fan. A plurality of openings are provided on the inner wall of the air collecting box and are linearly and equidistantly distributed. Nozzles are installed at the plurality of openings on the air collecting box. Two groups of air outlet fans are installed side by side in the left vent of the air cooling box.

[0014] In the above technical solution, further, the fin direction of the radiator is arranged parallel to the direction of the two vents of the air cooling box.

[0015] In this technical solution, it is ensured that the heat dissipated from the radiator can be quickly blown away by the air cooling mechanism along the gap between two adjacent fins.

[0016] In the above technical solution, further, a uniform amount of thermal conductive silicone grease is applied between the heat sink and the air collecting chamber.

[0017] In this technical solution, it is ensured that the heat in the air collecting chamber can be quickly guided to the radiator, thereby ensuring the cooling effect of the device.

[0018] In the above technical solution, further, protective mesh plates are fixed at the two ventilation holes of the air-cooling box, wherein dustproof nets are installed in the ventilation holes of the air-cooling box.

[0019] In the present technical solution, by providing a protective mesh plate, a good protective effect is played on the components in the air-cooled box, and by providing a dustproof net, external dust can be effectively prevented from entering the inner cavity of the air-cooled box.

[0020] In the above technical solution, further, the nozzle is a funnel-shaped structure, wherein one end of the nozzle with a small opening is arranged close to one side of the radiator.

[0021] In the present technical solution, by providing a nozzle, the air sucked into the inner cavity of the air cooling box by the air intake fan can be effectively cooled, thereby improving the cooling effect on the radiator.

[0022] In the above technical solution, further, the water cooling mechanism includes:

[0023] Two water pumps are symmetrically arranged and both are installed at the bottom of the inner cavity of the water cooling box. A water pipe is fixed to the water outlet end of the water pump. Vertical pipes are symmetrically arranged on the left and right sides above the S-shaped pipe. A plurality of linearly equidistantly distributed horizontal pipes are fixed between the two vertical pipes. A plurality of linearly equidistantly distributed mist nozzles are installed below the horizontal pipes. A clamp fixed to the inner wall of the water cooling box is symmetrically sleeved on the vertical pipe. One end of the vertical pipe is fixed to the water pipe, and the water pipe is connected to the vertical pipe and the horizontal pipe.

[0024] The beneficial effects of the utility model are:

[0025] 1. The cooling device of the air compressor is provided with an air cooling mechanism, and uses an air intake fan to suck the outside air into the inner cavity of the air cooling box and cool it down through multiple nozzles in the process, so that the wind entering the inner cavity of the air cooling box is cold air, thereby improving the cooling effect, and then through the cooperation with the air outlet fan, a complete air duct is formed, so that the high-temperature air in the inner cavity of the air cooling box can be quickly cooled down, ensuring that the high-temperature gas generated by the air compressor can be initially cooled down, and avoiding the air supply pipeline from bursting due to the large temperature difference when the high-temperature gas is directly water-cooled.

[0026] 2. The cooling device of the air compressor uses a water cooling mechanism to spray clean water from the inner cavity of the water cooling box into mist droplets using multiple mist nozzles. The mist droplets are in contact with the air to reduce the temperature of the water droplets. The mist droplets are then used to quickly cool the gas in the S-shaped tube. The cooling effect of the device is improved through spraying cooling treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0028] Figure 2 It is an exploded schematic diagram (overall) of the air cooling mechanism in the utility model;

[0029] Figure 3 It is a schematic diagram of the structure of the air collecting chamber and the radiator in the utility model;

[0030] Figure 4 It is an exploded schematic diagram (partial) of the air cooling mechanism in the utility model;

[0031] Figure 5 It is a structural schematic diagram of the nozzle in the utility model;

[0032] Figure 6 It is a structural schematic diagram of the water cooling mechanism in the utility model.

[0033] The symbols in the figure are:

[0034] 1. Air cooling box; 2. Water cooling box; 3. Air collecting chamber; 4. Support frame; 5. Radiator; 6. Diverter pipe; 7. Air pipe; 8. Fixed frame; 9. Inlet fan; 10. Air collecting box; 11. Nozzle; 12. Exhaust fan; 13. Protective mesh plate; 14. Dust net; 15. S-shaped pipe; 16. Water pump; 17. Vertical pipe; 18. Horizontal pipe; 19. Mist nozzle; 20. Clamp; 21. Water pipe. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0036] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but in appropriate cases, the techniques, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0038] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0039] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0040] Embodiment 1:

[0041] See also Figure 1 - Figure 6 As shown, this embodiment provides a cooling device for an air compressor, comprising:

[0042] An air-cooled box 1 is an internal hollow structure, and vents are symmetrically provided on the left and right sides of the air-cooled box 1. A water-cooled box 2 is fixedly installed on the right side of the air-cooled box 1. An air collecting chamber 3 is provided in the inner cavity of the air-cooled box 1. Support frames 4 are symmetrically fixed on the front and rear sides of the water-cooled box 2, and the bottom ends of the support frames 4 are fixed to the bottom surface of the inner cavity of the air-cooled box 1. A radiator 5 is installed on the upper surface of the air collecting chamber 3. A shunt pipe 6 is provided on the front side of the air collecting chamber 3, and the air inlet end of the shunt pipe 6 passes through the inner wall of the air-cooled box 1 and extends to the outside. An air supply pipe 7 is provided on the rear side of the air collecting chamber 3, and one end of the air supply pipe 7 passes through the inner wall of the air-cooled box 1 and extends to the inner cavity of the water-cooled box 2;

[0043] An air cooling mechanism is installed at the two vents and is used to cool the heat accumulated on the two radiators 5;

[0044] The S-shaped tube 15 is a coiled S-shaped structure, and the S-shaped tube 15 is arranged in the inner cavity of the water cooling box 2, and the air inlet end of the S-shaped tube 15 is connected to the air delivery pipe 7, and the air outlet end of the S-shaped tube 15 penetrates the inner wall of the water cooling box 2 and extends to the outside;

[0045] A water cooling mechanism is arranged directly above the S-shaped tube 15 and is used to perform secondary cooling on the high-temperature gas in the S-shaped tube 15;

[0046] In this embodiment, the air cooling mechanism includes:

[0047] A fixed frame 8 is installed in the inner cavity of the air-cooling box 1 and near the right vent. Two groups of air intake fans 9 are installed side by side in the fixed frame 8. An air collecting box 10 is fixed to the inner side of the air intake fan 9. A plurality of openings equidistantly distributed linearly are provided on the inner wall of the air collecting box 10. Nozzles 11 are installed at the plurality of openings on the air collecting box 10. Two groups of air outlet fans 12 arranged side by side are installed in the left vent of the air-cooling box 1.

[0048] In this embodiment, the water cooling mechanism includes:

[0049] Two water pumps 16 are symmetrically arranged and both are installed at the bottom of the inner cavity of the water cooling box 2. A water pipe 21 is fixed to the water outlet end of the water pump 16. Vertical pipes 17 are symmetrically arranged on the left and right sides above the S-shaped tube 15. A plurality of linearly equidistantly distributed horizontal pipes 18 are fixed between the two vertical pipes 17. A plurality of linearly equidistantly distributed mist nozzles 19 are installed below the horizontal pipes 18. A clamp 20 fixed to the inner wall of the water cooling box 2 is symmetrically sleeved on the vertical pipe 17. One end of the vertical pipe 17 is fixed to the water pipe 21. The water pipe 21 is connected to the vertical pipe 17 and the horizontal pipe 18.

[0050] Among them, the working principle of this device is as follows:

[0051] The shunt pipe 6 is connected to the air outlet pipe end of the air compressor, and the high-temperature gas is dispersed through the shunt pipe 6 and enters the inner cavity of the gas collecting chamber 3. At this time, the gas collecting chamber 3 begins to heat up under the action of the high-temperature gas, and then the high temperature is guided by the radiators 5 on the upper and lower sides, and is quickly discharged to the inner cavity of the air cooling box 1 through the multiple cooling fins on the radiator 5;

[0052] The air cooling mechanism is started. At this time, the two groups of air inlet fans 9 and the two groups of air outlet fans 12 start to work. The air inlet fans 9 work and generate negative pressure, so that the outside air enters the inner cavity of the air collecting box 10. Under the action of the nozzles 11, the temperature of the wind is reduced, and the cold air enters the inner cavity of the air cooling box 1 and blows the high temperature accumulated in the air cooling box 1 and on the radiator 5 to the vent on the left side of the air cooling box 1. At the same time, the two groups of air outlet fans 12 work and generate suction. The two groups of air outlet fans 12 suck the high-temperature air from the inner cavity of the air cooling box 1. Out to the outside, through the cooperation of the air inlet fan 9 and the air outlet fan 12, a complete air duct is formed, so that the high-temperature air in the inner cavity of the air-cooled box 1 can be quickly cooled down, ensuring that the high-temperature gas generated by the air compressor can be initially cooled down, and then the cooled gas enters the S-shaped tube 15 in the inner cavity of the water-cooled box 2 through the air delivery pipe 7. It is worth noting that when the wind enters the small end of the nozzle 11 from the large end of the nozzle 11 and is discharged, the wind is squeezed, the wind speed becomes faster, and the temperature is reduced, thereby forming cold wind;

[0053] First, clean water is injected into the inner cavity of the water-cooling box 2, and two exhaust fans 12 are started. The two exhaust fans 12 work to transport the water in the inner cavity of the water-cooling box 2 to the inner cavity of the water delivery pipe 21, and then the clean water enters the multiple horizontal pipes 18 through the vertical pipe 17, and forms uniform mist water droplets under the action of multiple mist nozzles 19. The water droplets naturally settle under the action of gravity and fall on the surface of the S-shaped tube 15 below, thereby cooling the S-shaped tube 15 for a second time. The excess clean water on the S-shaped tube 15 will fall back into the water-cooling box 2 below, thus forming a cycle. It is worth noting that the operator needs to replenish the inner cavity of the water-cooling box 2 with clean water in time. In addition, the outer wall of the S-shaped tube 15 is sprayed with a dense protective layer to avoid rust due to direct contact with water.

[0054] By setting up an air cooling mechanism, an air intake fan 9 is used to suck external air into the inner cavity of the air cooling box 1 and cool it down through multiple nozzles 11 in the process, so that the wind entering the inner cavity of the air cooling box 1 is cold air, thereby improving the cooling effect, and then through cooperation with the air outlet fan 12, a complete air duct is formed, so that the high-temperature air in the inner cavity of the air cooling box 1 can be quickly cooled down, ensuring that the high-temperature gas generated by the air compressor can be initially cooled down, and avoiding the situation where the air supply pipeline bursts due to the large temperature difference when the high-temperature gas is directly water-cooled; through the water cooling mechanism, multiple mist nozzles 19 are used to spray the clean water in the inner cavity of the water cooling box 2 into mist droplets, and the mist droplets are used to contact with the air to reduce the temperature of the water droplets, and then the gas in the S-shaped tube 15 is quickly cooled down by the mist droplets, and the cooling effect of the device is improved through the spraying cooling treatment.

[0055] Embodiment 2:

[0056] This embodiment provides a cooling device for an air compressor. In addition to the technical solutions of the above embodiments, it also has the following technical features: the fin direction of the radiator 5 is arranged parallel to the direction of the two vents of the air cooling box 1.

[0057] Here, it is ensured that the heat emitted from the radiator 5 can be quickly blown away by the air cooling mechanism along the gap between two adjacent fins.

[0058] Embodiment 3:

[0059] This embodiment provides a cooling device for an air compressor. In addition to the technical solutions of the above embodiments, it also has the following technical features: uniform thermal conductive silicone grease is applied between the radiator 5 and the air collecting chamber 3.

[0060] The heat in the air collecting chamber 3 is ensured to be quickly guided to the radiator 5, thereby ensuring the cooling effect of the device.

[0061] Embodiment 4:

[0062] The present embodiment provides a cooling device for an air compressor. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features: protective mesh plates 13 are fixed at the two ventilation holes of the air-cooled box 1, and dustproof meshes 14 are installed in the ventilation holes of the air-cooled box 1.

[0063] The protective mesh plate 13 is provided to provide good protection for the components in the air-cooled box 1 , and the dust-proof net 14 is provided to effectively prevent external dust from entering the inner cavity of the air-cooled box 1 .

[0064] Embodiment 5:

[0065] This embodiment provides a cooling device for an air compressor. In addition to the technical solutions of the above embodiments, it also has the following technical features: the nozzle 11 is a funnel-shaped structure, wherein the end with a small opening of the nozzle 11 is arranged close to one side of the radiator 5.

[0066] Among them, by providing the nozzle 11 , the air sucked into the inner cavity of the air cooling box 1 by the air intake fan 9 can be effectively cooled, thereby improving the cooling effect on the radiator 5 .

[0067] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A cooling device for an air compressor, characterized in that: include: An air-cooling box (1), wherein the air-cooling box (1) is an internal hollow structure, and vents are symmetrically provided on the left and right sides of the air-cooling box (1). A water-cooling box (2) is fixedly installed on the right side of the air-cooling box (1), and an air collecting chamber (3) is provided in the inner cavity of the air-cooling box (1). Support frames (4) are symmetrically fixed on the front and rear sides of the water-cooling box (2), and the bottom end of the support frame (4) is fixed to the bottom surface of the inner cavity of the air-cooling box (1). A radiator (5) is installed on the upper surface of the air-collecting chamber (3), and a shunt pipe (6) is provided on the front side of the air-collecting chamber (3), and the air inlet end of the shunt pipe (6) passes through the inner wall of the air-cooling box (1) and extends to the outside, and an air supply pipe (7) is provided on the rear side of the air-collecting chamber (3), and one end of the air supply pipe (7) passes through the inner wall of the air-cooling box (1) and extends to the inner cavity of the water-cooling box (2); An air cooling mechanism, which is installed at the two vents and is used to cool the heat accumulated on the two radiators (5); An S-shaped tube (15), the S-shaped tube (15) presenting a coiled S-shaped structure, the S-shaped tube (15) being arranged in the inner cavity of the water cooling box (2), the air inlet end of the S-shaped tube (15) being connected to the air delivery pipe (7), and the air outlet end of the S-shaped tube (15) penetrating the inner wall of the water cooling box (2) and extending to the outside; A water cooling mechanism is arranged directly above the S-shaped tube (15) and is used for secondary cooling of the high-temperature gas in the S-shaped tube (15).

2. The cooling device for an air compressor according to claim 1, characterized in that: The air cooling mechanism comprises: A fixed frame (8), the fixed frame (8) is installed in the inner cavity of the air cooling box (1) and close to the right ventilation port, two groups of air intake fans (9) are installed side by side in the fixed frame (8), an air collecting box (10) is fixed on the inner side of the air intake fan (9), a plurality of openings linearly and equidistantly distributed are provided on the inner wall of the air collecting box (10), nozzles (11) are installed at the plurality of openings on the air collecting box (10), and two groups of air outlet fans (12) arranged side by side are installed in the left ventilation port of the air cooling box (1).

3. The cooling device for an air compressor according to claim 2, characterized in that: The fin direction of the radiator (5) is arranged in parallel with the direction of the two ventilation openings of the air cooling box (1).

4. The cooling device for an air compressor according to claim 1, characterized in that: A uniform layer of thermal conductive silicone grease is applied between the heat sink (5) and the gas collecting chamber (3).

5. The cooling device for an air compressor according to claim 1, characterized in that: Protective mesh plates (13) are fixed at the two ventilation openings of the air cooling box (1), wherein a dustproof net (14) is installed in the ventilation opening of the air cooling box (1).

6. The cooling device for an air compressor according to claim 2, characterized in that: The nozzle (11) is in a funnel-shaped structure, wherein an end with a small opening of the nozzle (11) is arranged close to one side of the radiator (5).

7. The cooling device for an air compressor according to claim 1, characterized in that: The water cooling mechanism comprises: Two water pumps (16) are symmetrically arranged and both are installed at the bottom of the inner cavity of the water cooling box (2); a water delivery pipe (21) is fixed to the water outlet end of the water pump (16); vertical pipes (17) are symmetrically arranged on the left and right sides above the S-shaped pipe (15); a plurality of linearly equidistantly distributed horizontal pipes (18) are fixed between the two vertical pipes (17); a plurality of linearly equidistantly distributed mist nozzles (19) are installed below the horizontal pipes (18); a clamp (20) fixed to the inner wall of the water cooling box (2) is symmetrically sleeved on the vertical pipes (17); one end of the vertical pipe (17) is fixed to the water delivery pipe (21); the water delivery pipe (21) is connected to the vertical pipe (17) and the horizontal pipe (18).

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