A cleaning system and cleaning workshop for rail vehicle parts

Abstract

This invention discloses a cleaning system and cleaning workshop for rail vehicle components, relating to the field of cleaning technology. The invention includes a wastewater collection tank, a sedimentation tank, a circulating water tank, a cleaning platform, a primary washing mechanism, a secondary washing mechanism, and a drying mechanism. The wastewater collection tank has a drainage plate on its top surface, and the cleaning platform is located on the drainage plate. Wastewater from the wastewater collection tank is discharged to the sedimentation tank through pipes. The sedimentation tank is connected to a drain pipe that extends into the circulating water tank and is equipped with a valve. The primary washing mechanism includes a water pump and a primary washing gun. The water pump is connected to a suction pipe and a delivery pipe. The suction pipe extends into the circulating water tank, and the delivery pipe is connected to the primary washing gun. The secondary washing mechanism includes a water tank and a secondary washing gun. The water tank is connected to a clean water pipe, and the secondary washing gun is connected to the water tank. The drying mechanism includes a drying box and a drying gun. The drying gun is connected to the drying box, and the drying box is connected to an air supply pipe. This invention improves water resource utilization and reduces cleaning costs.

Description

Technical Field

[0001] This invention belongs to the field of cleaning technology, specifically relating to a cleaning system and cleaning workshop for rail vehicle components. Background Technology

[0002] In the production process of rail vehicle components, the products usually need to be processed by turning and drilling. As a result, a large amount of cutting fluid, metal shavings and other debris will usually adhere to the components. Before assembling the rail vehicle, the components must be cleaned. The traditional cleaning method is to put the components into a cleaning solution and clean them manually. This method is very inefficient, labor-intensive and cannot meet the needs of modern industrial production. Moreover, the cleaning standards are difficult to control. In addition, due to the large human factor, the rail vehicle components need to be air-dried after cleaning, which causes dust in the air to adhere to the surface of the rail vehicle components, thus damaging the cleanliness of the rail vehicle components after cleaning.

[0003] Currently, in the production process of rail vehicle parts, the workshop is the main source of wastewater. Most of the wastewater generated is directly discharged into the sewage system. The utilization rate of water resources during the cleaning process is low, resulting in a large demand for cleaning water and increasing cleaning costs. In today's increasingly water-scarce urban environment, this incomplete utilization of water resources urgently needs to be improved. Summary of the Invention

[0004] This invention discloses a cleaning system and cleaning workshop for rail vehicle parts, which aims to solve the technical problems of low water resource utilization and high cleaning cost in the existing rail vehicle parts cleaning process.

[0005] To solve the aforementioned technical problems, the present invention adopts the following technical solution:

[0006] A cleaning system for rail vehicle components includes a wastewater collection tank, a sedimentation treatment tank, a circulating water tank, a cleaning platform, and a primary washing mechanism, a secondary washing mechanism, and a drying mechanism located near the cleaning platform. The wastewater collection tank has a drainage plate on its top surface, and the cleaning platform is located on the drainage plate. Wastewater in the wastewater collection tank is discharged to the sedimentation treatment tank through a pipe. The sedimentation treatment tank is connected to a drain pipe, which extends into the circulating water tank and is equipped with a valve. The primary washing mechanism includes a water pump and a primary washing gun. The water pump is connected to a suction pipe and a delivery pipe. The suction pipe extends into the circulating water tank, and the delivery pipe is connected to the primary washing gun. The secondary washing mechanism includes a water tank and a secondary washing gun. The water tank is connected to a clean water pipe, and the secondary washing gun is connected to the water tank. The drying mechanism includes a drying box and a drying gun. The drying gun is connected to the drying box, and the drying box is connected to an air supply pipe.

[0007] The cleaning system of this invention cleans rail vehicle parts by placing them on a cleaning platform for rinsing. A water pump in the first washing mechanism draws circulating water from a circulating water tank to a first washing gun for a first rinse. Then, a second washing gun releases clean water from the tank for a second rinse. After rinsing, the rail vehicle parts are dried by a drying gun in a drying box, reducing drying time and preventing dust in the air from adhering to the surface of the rail vehicle parts and affecting their cleanliness. During the cleaning process, the use of equipment such as primary and secondary water guns and air-drying guns greatly reduces the intensity of manual cleaning of rail vehicle parts and improves cleaning efficiency. The cleaning water after the two rinses enters the wastewater collection tank through the drainage board. The cleaning water in the wastewater collection tank is discharged into the sedimentation treatment tank through pipes for sedimentation. During the sedimentation process, some flocculant can be added to improve the sedimentation effect. After sedimentation, the resulting circulating water is released into the circulating water tank by opening the valve on the drain pipe for the first rinse of the next batch of rail vehicle parts. Although the use of circulating water improves the utilization rate of water resources, the cleanliness of the circulating water will still be significantly affected after multiple cycles, and it is still necessary to clean and replace it regularly to maintain the cleanliness. Since the impact of rinsing on the cleaning water of rail vehicle parts is not significant, directly discharging it into the sewage system would reduce water resource utilization and increase cleaning costs in the workshop, which would be detrimental to the company's development. This invention recycles the cleaning water by setting up a wastewater collection tank, a sedimentation treatment tank, and a circulating water tank, which greatly improves water resource utilization and reduces the cleaning cost of rail vehicle parts.

[0008] Preferably, drainage plates are provided on both sides of the top surface of the wastewater collection tank, and a bottom plate is provided between the two drainage plates. The interior of the wastewater collection tank has an inclined surface that slopes towards the sedimentation treatment tank, and the sedimentation treatment tank is located on the lower side of the inclined surface.

[0009] The cleaning water is collected into a wastewater collection tank via a drainage board for recycling. The wastewater collection tank has an incline that slopes towards a sedimentation tank, which facilitates the collection of cleaning water for sedimentation and promotes the use of recycled water.

[0010] Preferably, the wastewater collection tank is provided with two first slide rails, which are arranged along the length of both sides of the wastewater collection tank, and transverse scrapers are slidably arranged on the two first slide rails; a second slide rail is provided on the side of the wastewater collection tank near the sedimentation treatment tank, and a longitudinal scraper is slidably arranged on the second slide rail; a filter basket is also provided on the wastewater collection tank, which is embedded inside the wastewater collection tank, and one side of the filter basket covers the passage between the wastewater collection tank and the sedimentation treatment tank, and the opening plane of the filter basket is flush with the ground of the wastewater collection tank.

[0011] The horizontal and vertical scrapers work together to scrape away the fine metal debris that has settled at the bottom of the wastewater collection tank. The horizontal scraper scrapes along the length, and then the vertical scraper scrapes longitudinally, moving the metal debris into the filter basket. Since one side of the filter basket covers the passage between the wastewater collection tank and the sedimentation tank, the metal debris is blocked by the filter basket and will not enter the sedimentation tank. Every once in a while, the staff can remove the filter basket to collect and reuse the collected metal debris.

[0012] Preferably, a first sewage pipe is provided at the bottom of one side of the sedimentation treatment tank, and a valve is provided on the first sewage pipe, which is connected to the external sewage system.

[0013] The first sewage pipe facilitates the discharge of cleaning wastewater from the sedimentation tank, which is beneficial for the regular cleaning of the sedimentation tank.

[0014] Preferably, a second sewage pipe is provided on the upper part of one side of the circulating water pool, the second sewage pipe is equipped with a valve, and the second sewage pipe is connected to the external sewage system.

[0015] The second sewage pipe allows for the discharge of circulating water from the circulating water tank. This not only facilitates regular cleaning of the circulating water tank but also prevents overflow of the tank after multiple batches of rail vehicle component cleaning when the second cleaning water is added to the circulating water, which can no longer be contained in the sedimentation treatment tank and the circulating water tank.

[0016] Preferably, both the sedimentation tank and the circulating water tank are provided with a sealing cover.

[0017] The sedimentation tank and circulating water tank are sealed with a sealing cover to prevent water from overflowing.

[0018] Preferably, it also includes a rainwater collection mechanism, which includes a rainwater pipe and a collection trough, the bottom of the rainwater pipe extending into the circulating water tank, and the collection trough being connected to the top of the collection trough.

[0019] Rainwater can be collected during rainfall via rainwater pipes and collection troughs for use during the first washing of rail vehicle components, which can improve water resource utilization and effectively reduce cleaning costs. Excess rainwater can be discharged through a second sewage pipe to prevent rainwater from exceeding the capacity of the circulating water pool.

[0020] A cleaning workshop for rail vehicle parts includes a workshop body and a control system. The workshop body is equipped with the cleaning system described above. The control system is located inside the workshop body. The valves on the drain pipe, the first sewage pipe and the second sewage pipe are all electric valves, and each of the electric valves is electrically connected to the control system.

[0021] The cleaning workshop of this invention effectively meets the cleaning needs of rail vehicle components during production. During cleaning, the control system opens electric valves on the drain pipes to discharge settled circulating water into a circulating water tank for the initial rinsing of the rail vehicle components. When the cleanliness of the circulating water is significantly affected after multiple cycles, the control system opens electric valves on the first and second sewage pipes to discharge sewage into the drainage system, facilitating regular cleaning of the settling tank and circulating water tank. When rainwater is used to replenish the circulating water, the second sewage pipe can discharge water from the circulating water tank, preventing it from exceeding its capacity. This cleaning workshop effectively improves water resource utilization, achieves rational use of water resources, reduces production costs, and benefits enterprise development.

[0022] Preferably, the workshop body is provided with several support frames and crossbars. The support frames are arranged in parallel and spaced apart. The drainage board is located inside the support frame. The crossbars are arranged below the support frames and are connected to each support frame. Mounting brackets are provided between adjacent support frames. The water tank and the drying box are both mounted on the mounting brackets.

[0023] The water tank and drying box are installed on the support frame using mounting brackets, which allows for a reasonable layout of the interior of the workshop and facilitates its use.

[0024] Preferably, a rinsing water pipe is connected to the water gun, the rinsing water pipe is connected to the water supply pipe, and a sliding seat is slidably provided on both the support frame and the crossbar, with a hook for suspending the rinsing water pipe provided below the sliding seat.

[0025] By using the sliding seat on the support frame and crossbar, the flushing water pipe of the first washing gun is suspended on the hook below the sliding seat to lift the flushing water pipe and prevent it from getting tangled. When performing the first flushing of rail vehicle parts, the flushing water pipe can be pulled to increase the flushing range of the first washing gun.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] 1. This invention collects and settles the cleaning water used for cleaning rail vehicle parts by setting up a wastewater collection tank, a sedimentation treatment tank and a circulating water tank, and then recycles the cleaning water, which effectively improves the utilization rate of water resources and reduces the cleaning cost of rail vehicle parts.

[0028] 2. This invention greatly reduces the intensity of manual cleaning of rail vehicle parts and improves cleaning efficiency by using equipment such as a first washing water gun, a second washing water gun, and an air drying gun.

[0029] 3. This invention uses rainwater collection pipes and collection tanks in the rainwater collection mechanism to collect rainwater during rainfall, which can be used for the first washing of rail vehicle parts. This can improve the utilization rate of water resources, effectively reduce cleaning costs, and discharge excess rainwater through the second sewage pipe to prevent rainwater from exceeding the capacity of the circulating water pool.

[0030] 4. The present invention makes it convenient to operate by setting the valves on the drain pipe, the first sewage pipe and the second sewage pipe as electric valves and controlling the opening of the electric valves through the control system.

[0031] 5. The present invention facilitates the installation of water tanks and drying boxes through the setting of support frame, crossbar, mounting bracket and sliding seat. The sliding seat supports the rinsing water pipe of the washing water tank to avoid tangling. The internal layout of the workshop body is reasonable and conducive to use. Attached Figure Description

[0032] The present invention will be described by way of example and with reference to the accompanying drawings, wherein:

[0033] Figure 1 This is a schematic diagram of the structure of the present invention;

[0034] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle;

[0035] Figure 3 yes Figure 1 A magnified view of a portion of point B in the middle;

[0036] Figure 4 This is a schematic diagram of the distribution structure of the transverse and longitudinal scrapers in Example 3.

[0037] Reference numerals: 1-Wastewater collection tank, 2-Sedimentation treatment tank, 3-Circulating water tank, 4-Washing platform, 5-Drainage board, 6-Drainage pipe, 7-Water pump, 8-First washing gun, 9-Pumping pipe, 10-Water supply pipe, 11-Water tank, 12-Second washing gun, 13-Clean water pipe, 14-Drying box, 15-Drying gun, 16-Air supply pipe, 17-Base plate, 18-Filter basket, 19-First sewage pipe, 20-Second sewage pipe, 21-Sealing cover, 22-Rainwater pipe, 23-Collection tank, 24-Control system, 25-Support frame, 26-Crossbar, 27-Mounting bracket, 28-Rinsing water pipe, 29-Sliding seat, 30-Hook, 31-Longitudinal scraper, 32-Transverse scraper, 33-First slide rail, 34-Bottom of collection tank, 35-Second slide rail. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments and accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0039] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of describing this application and simplifying the description, and 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. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] The following is combined Figures 1-3 The present invention will be described in detail below.

[0041] Example 1:

[0042] This embodiment provides a cleaning workshop for rail vehicle parts, including a workshop body, a control system 24, and a cleaning system. The workshop body includes a workshop floor, workshop walls, and a workshop roof. The control system 24 is a PLC controller installed on the workshop walls. The cleaning system includes a wastewater collection tank 1, a sedimentation tank 2, a circulating water tank 3, a cleaning platform 4, and a first-wash mechanism, a second-wash mechanism, and a drying mechanism located near the cleaning platform 4. The workshop floor has a recessed area, and the wastewater collection tank 1 is located in the recessed area. Drainage plates 5 are provided on both sides of the top surface of the wastewater collection tank 1, and a base plate 17 is provided between the two drainage plates 5. The cleaning platform 4 is located on the drainage plates 5. The interior of the wastewater collection tank 1 has an inclined surface that slopes towards the sedimentation tank 2. The sedimentation tank 2 is located on the lower side of the inclined surface. A pipe is connected to the lowest point of the inclined surface of the wastewater collection tank 1, and the wastewater in the wastewater collection tank 1 is discharged to the sedimentation tank through the pipe. A drain pipe 6 is connected to the upper part of the side of the sedimentation tank, and the drain pipe 6 extends into the circulating water tank 3 and is equipped with an electric valve. A first sewage pipe 19 is provided at the bottom of the side of the circulating water tank 3, and a second sewage pipe 20 is provided at the upper part of the side of the circulating water tank 3. Both the first sewage pipe 19 and the second sewage pipe 20 are equipped with electric valves. Both the first sewage pipe 19 and the second sewage pipe 20 are connected to the external sewage system. The drain pipe 6, the electric valves on the first sewage pipe 19 and the second sewage pipe 20 are all electrically connected to the control system 24. The washing mechanism includes a water pump 7 and a washing water gun 8. The water pump 7 is installed on the workshop floor, and the inlet and outlet of the water pump 7 are respectively connected to... There is a water pumping pipe 9 and a water supply pipe 10. The water pumping pipe 9 extends into the circulating water tank 3. A rinsing water pipe 28 is connected to a first washing water gun 8. The rinsing water pipe 28 is connected to the water supply pipe 10. The second washing mechanism includes a water tank 11 and a second washing water gun 12. The water tank 11 is connected to a clean water pipe 13. The second washing water gun 12 is connected to the water tank 11. The air drying mechanism includes an air drying box 14 and an air drying gun 15. The air drying gun 15 is connected to the air drying box 14. The air drying box 14 is connected to an air supply pipe 16. The clean water pipe 13 and the air supply pipe 16 are both installed on the workshop wall.

[0043] In this embodiment, six portal-shaped support frames 25 are installed at intervals on the workshop floor. Two crossbars 26 are welded to the bottom of each support frame 25 to fix the six support frames 25 together. The water supply pipe 10 is fixed to the support frame 25. Mounting brackets 27 are installed in the middle of both sides of the second and third support frames 25 from the left. Mounting brackets 27 are also installed in the middle of both sides of the fourth and fifth support frames 25. Each mounting bracket 27 is equipped with a water tank 11 and a drying box 14. Six sliding seats 29 are slidably installed on each of the two crossbars 26. Two sliding seats 29 are slidably installed on each of the second and fifth support frames 25 from the left. Hooks 30 are provided below the sliding seats 29 for suspending the rinsing water pipe 28 to lift the rinsing water pipe 28 and prevent it from getting tangled. During the first rinse, the rinsing water pipe 28 is pulled to increase the rinsing range of the washing gun 8.

[0044] The specific usage method of this embodiment is as follows:

[0045] Rail vehicle components are transported and placed on a washing platform. A first wash gun (8) removes cutting fluid, metal shavings, and other debris from the components. A second wash gun (12) performs a second wash. Finally, a drying gun (15) dries the components. The washing water from both washes flows through a drain plate (5) into a wastewater collection tank (1). The wastewater in the collection tank is then piped into a settling tank (2) for sedimentation. After sedimentation, the control system (24) opens an electric valve on a drain pipe (6) to discharge the settled water into a circulating water tank (3) for the first wash of the next batch of rail vehicle components. After multiple cycles of circulation, the cleanliness level decreases. The control system (24) then opens electric valves on a first wastewater pipe (19) and a second wastewater pipe (20) to discharge wastewater into the drainage system for periodic cleaning of the settling tank (2) and the circulating water tank (3).

[0046] Example 2:

[0047] Unlike Embodiment 1, this embodiment also includes a rainwater collection mechanism, which includes a rainwater pipe 22 and a collection trough 23. The bottom of the rainwater pipe 22 extends into the circulating water pool 3, and the upper end of the rainwater pipe 22 extends from the workshop roof and is connected to the collection trough 23 at the top.

[0048] Specifically, rainwater can be collected during rainfall through rainwater pipe 22 and collection tank 23 for use during the first washing of rail vehicle parts, which can improve the utilization rate of water resources and effectively reduce cleaning costs.

[0049] Example 3

[0050] Unlike Example 1, in this example, reference is made to the appendix. Figure 4The wastewater collection tank 1 is provided with two first slide rails 33, which are arranged along the length of both sides of the wastewater collection tank 1. A transverse scraper 32 is slidably mounted on the two first slide rails 33. A second slide rail 35 is provided on the side of the wastewater collection tank 1 near the sedimentation treatment tank 2, and a longitudinal scraper 31 is slidably mounted on the second slide rail 35. A filter basket 18 is also provided on the wastewater collection tank 1, embedded inside the wastewater collection tank 1. One side of the filter basket 18 covers the passageway between the wastewater collection tank 1 and the sedimentation treatment tank 2. The opening plane is flush with the ground of the wastewater collection tank 1; the horizontal scraper 32 and the vertical scraper 31 work together to scrape the fine metal debris settled at the bottom of the wastewater collection tank 1. The horizontal scraper 32 scrapes along the length direction, and then the vertical scraper 31 scrapes longitudinally to scrape the metal debris into the filter basket 18. Since one side of the filter basket 18 covers the passage between the wastewater collection tank 1 and the sedimentation treatment tank 2, the metal debris will be blocked by the filter basket 18 and will not enter the sedimentation treatment tank 2; every once in a while, the staff can take out the filter basket 18 to collect and utilize the collected metal debris.

[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cleaning system for rail vehicle components, characterized in that, The system includes a wastewater collection tank (1), a sedimentation treatment tank (2), a circulating water tank (3), a washing platform (4), and a first washing mechanism, a second washing mechanism, and a drying mechanism located near the washing platform (4). The top surface of the wastewater collection tank (1) is provided with a drainage plate (5), and the washing platform (4) is located on the drainage plate (5). The wastewater in the wastewater collection tank (1) is discharged to the sedimentation treatment tank through a pipe. The sedimentation treatment tank is connected to a drain pipe (6), which extends into the circulating water tank (3) and is equipped with a valve. The first washing mechanism includes a water pump (7) and a first washing water gun (8). The water pump (7) is connected to a water pumping pipe (9) and a water delivery pipe (10) respectively. The water pumping pipe (9) extends into the circulating water tank (3). The water delivery pipe (10) is connected to a first washing gun (8). The second washing mechanism includes a water tank (11) and a second washing gun (12). The water tank (11) is connected to a clean water pipe (13). The second washing gun (12) is connected to the water tank (11). The air drying mechanism includes an air drying box (14) and an air drying gun (15). The air drying gun (15) is connected to the air drying box (14). The air drying box (14) is connected to an air supply pipe (16). The wastewater collection tank (1) has drainage plates (5) on both sides of its top surface, and a bottom plate (17) is provided between the two drainage plates (5). The interior of the wastewater collection tank (1) has an inclined surface that slopes toward the sedimentation treatment tank (2), and the sedimentation treatment tank (2) is located on the lower side of the inclined surface. The drainage pipe (6) is located on the upper part of one side of the sedimentation treatment tank. The bottom of one side of the sedimentation treatment tank (2) is provided with a first sewage pipe (19), and a valve is provided on the first sewage pipe (19). The first sewage pipe (19) is connected to the external sewage system. A second sewage pipe (20) is provided on the upper part of one side of the circulating water tank (3). A valve is provided on the second sewage pipe (20), and the second sewage pipe (20) is connected to the external sewage system. Both the sedimentation treatment tank (2) and the circulating water tank (3) are equipped with sealing covers (21). It also includes a rainwater collection mechanism, which includes a rainwater pipe (22) and a collection trough (23), the bottom of which extends into the circulating water pool (3), and the collection trough (23) is connected to the top of the collection trough (23).

2. The rail vehicle component cleaning system according to claim 1, characterized in that, The wastewater collection tank (1) is provided with two first slide rails (33), which are arranged along the length of both sides of the wastewater collection tank (1). A transverse scraper (32) is slidably arranged on the two first slide rails (33). A second slide rail (35) is provided on the side of the wastewater collection tank (1) near the sedimentation treatment tank (2). A longitudinal scraper (31) is slidably arranged on the second slide rail (35). A filter basket (18) is also provided on the wastewater collection tank (1). The filter basket (18) is embedded in the interior of the wastewater collection tank (1). One side of the filter basket (18) covers the passage between the wastewater collection tank (1) and the sedimentation treatment tank (2). The opening plane of the filter basket (18) is flush with the ground (34) of the collection tank of the wastewater collection tank (1).

3. A cleaning workshop for rail vehicle parts, characterized in that, The system includes a workshop body and a control system (24). The workshop body is equipped with a cleaning system as described in any one of claims 1 to 2. The control system (24) is located inside the workshop body. The valves on the drain pipe (6), the first sewage pipe (19), and the second sewage pipe (20) are all electric valves. Each of the electric valves is electrically connected to the control system (24).

4. A cleaning workshop for rail vehicle parts according to claim 3, characterized in that, The workshop body is provided with several support frames (25) and crossbars (26). The support frames (25) are arranged in parallel and spaced apart. The drainage board (5) is located inside the support frame (25). The crossbars (26) are arranged below the support frame (25) and are connected to each support frame (25). There are mounting brackets (27) between adjacent support frames (25). The water tank (11) and the drying box (14) are both mounted on the mounting brackets (27).

5. A cleaning workshop for rail vehicle parts according to claim 4, characterized in that, The washing gun (8) is connected to a rinsing water pipe (28), which is connected to a water supply pipe (10). The support frame (25) and the crossbar (26) are both slidably provided with sliding seats (29), and a hook (30) for suspending the rinsing water pipe (28) is provided below the sliding seat (29).

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