A copper wire drawing machine for cable production

Abstract

The present application relates to a copper wire drawing machine for cable production, which belongs to the technical field of lubrication of drawn materials. The machine includes a filter tower, which includes an inner tower and an outer tower, and the outer tower is arranged around the inner tower; a partition plate is fixed in the outer tower, and the partition plate divides the outer tower into a liquid inlet chamber and a liquid outlet chamber; a filter material turntable is arranged in the inner tower, and filter material is arranged in the filter material turntable; a liquid inlet port 1 is arranged at the bottom end of the inner tower, and a liquid outlet port 2 is arranged at the top end of the inner tower; a liquid outlet pipe 1 is arranged on the outer tower and is connected to the liquid outlet chamber. A plurality of liquid inlet pipes are fixed in the liquid inlet chamber, and a plurality of liquid outlet holes are opened on the liquid inlet pipes, and the liquid outlet holes are arranged to face upward. The present application has the effect of improving the filtration efficiency of the lubricating liquid.

Description

Technical Field

[0001] The present application relates to the technical field of lubrication of drawn materials, and in particular to a copper wire drawing machine for cable production. Background Art

[0002] During the copper wire drawing process, the lubricant forms a micron-sized lubricating film on the copper surface through physical adsorption, effectively reducing the friction coefficient between the die and the wire, minimizing surface scratches and energy loss. The lubricant rapidly dissipates heat generated by plastic deformation through forced convection heat transfer, maintaining the stability of the material's work-hardening properties. The corrosion-inhibiting components in the lubricant form a monomolecular protective layer on the copper surface, blocking oxygen and inhibiting the formation of copper oxide.

[0003] During continuous production, the lubricant circulation system continuously introduces copper shavings, wear particles from mold plating, tungsten carbide hard particles from flaking, and fibrous impurities from the environment. The current treatment process uses a magnetic field to absorb ferromagnetic impurities, sedimentation treatment for particles larger than 100μm, and a filter to intercept fine impurities.

[0004] The traditional filter system has a flow-precision paradox. When a 400-mesh filter is used, the effective flux can only be maintained at 20m 3 / h, cannot match the high-speed wire drawing machine 40m 3 / min circulation requirements. Furthermore, the filter cake layer formed by copper shavings accumulation can increase pressure drop from 0.15 MPa to 0.8 MPa within 4 hours, triggering a pressure differential alarm and shutdown. Although self-cleaning filters can extend the cleaning cycle to 8 hours, the mechanical vibration caused by backwashing can accelerate the failure of pipe joint seals. Summary of the Invention

[0005] In order to improve the problem of affecting circulation in the existing lubricating liquid filtration process, the present application provides a copper wire drawing machine for cable production.

[0006] The present application provides a copper wire drawing machine for cable production that adopts the following technical solutions:

[0007] A copper wire drawing machine for cable production includes a filter tower, wherein the filter tower includes:

[0008] An inner tower and an outer tower, wherein the outer tower is arranged around the inner tower;

[0009] Partition 1, the partition 1 is fixedly arranged in the outer tower, and the partition 1 divides the outer tower into a liquid inlet chamber and a liquid outlet chamber;

[0010] A filter material turntable is arranged in the inner tower, and filter material is arranged in the filter material turntable;

[0011] A first liquid inlet and a second liquid outlet, wherein the first liquid inlet is provided at the bottom end of the inner tower, and the second liquid outlet is provided at the top end of the inner tower;

[0012] A liquid outlet pipe 1 is provided on the outer tower and communicated with the liquid outlet chamber.

[0013] Optionally, a plurality of liquid inlet pipes are fixedly provided in the liquid inlet chamber, a plurality of liquid outlet holes are opened on the liquid inlet pipes, and the liquid outlet holes are arranged to face upwards.

[0014] Optionally, a partition plate 2 is fixedly provided in the inner tower, and the partition plate 2 divides the inner tower into a filter chamber and a backwash chamber; the liquid inlet 1 is located between the filter chamber and the liquid inlet chamber; the liquid outlet 2 is located between the filter chamber and the liquid outlet chamber; and the top of the inner tower is provided with a liquid inlet 2 between the liquid outlet chamber and the backwash chamber.

[0015] Optionally, a filter material channel is fixedly provided in the inner tower, and the filter material turntable is rotatably arranged in the filter material channel; a filter material bin is provided in the filter material turntable, and the filter material is arranged in the filter material bin; a liquid flow hole is opened through the filter material channel; when the filter material turntable stops rotating, the filter material bin is aligned with the liquid flow hole.

[0016] Optionally, a pickling chamber is further provided in the inner tower, a pickling liquid inlet pipe is fixedly provided at the top of the pickling chamber, and a pickling liquid outlet pipe is fixedly provided at the bottom of the pickling chamber.

[0017] Optionally, a central shaft is fixedly provided in the inner tower, a driving motor is fixedly provided at the top end of the central shaft, a driving shaft is rotatably provided in the central shaft; and the filter material turntable is fixedly connected to the driving shaft.

[0018] Optionally, the inner tower is provided with a slide groove between the filter chamber and the liquid inlet chamber, a slide plate is slidably arranged in the slide groove, an electromagnetic switch is provided on the connection circuit between the drive motor and the power supply, a control switch is provided on the slide plate, and the electromagnetic switch is connected to the control switch.

[0019] Optionally, the control switch 1 includes a metal sheet fixed on the outer peripheral surface of the slide 1, a metal rod fixed in the slide groove 1, and a resistance wire in contact with the metal sheet; the metal sheet is slidably connected to the metal rod.

[0020] Optionally, the electromagnetic switch 1 is connected to the control switch 1 through a comparator and a relay.

[0021] Optionally, the inner tower is provided with a slide vane 2 which is slidably disposed between the filter chamber and the liquid outlet chamber; an electromagnetic switch 2 is provided on the connection circuit between the drive motor and the power supply, a control component 2 is provided on the slide vane 2, and the electromagnetic switch 2 is connected to the control component 2.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The present application adds triethanolamine to the lubricating fluid. Triethanolamine can not only reduce the surface tension of the lubricating fluid, but also cause the oil droplets to aggregate and float through the adsorption of polar groups, making it easier to clean up with a defoaming agent later. At the same time, triethanolamine can reduce the contamination of the filter material by oil substances on the surface of the copper wire, thereby reducing the number of cleaning steps for the filter material.

[0024] 2. The cyclical rotation of the filter media turntable sequentially feeds the three filter media chambers into the filtration, pickling, and backwashing chambers, forming a closed-loop operation. Citric acid in the pickling chamber reacts with the metal oxides on the filter media surface, dissolving them. The backwash chamber utilizes a lubricating fluid to flush the filter media in reverse, removing hard particles larger than 10μm. This mechanism shortens the filter media regeneration cycle, increases filtration throughput, and enhances cycle efficiency compared to traditional downtime cleaning methods.

[0025] 3. The displacement of the slider is linearly related to the density difference of the lubricating fluid. When the filtration efficiency decreases, the slider moves, causing the resistance of the control circuit to increase. When the comparator detects that the input voltage exceeds the threshold, it triggers the electromagnetic switch to close, driving the motor to perform the stepping action. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of the filter tower of the embodiment of the present application.

[0027] Figure 2 It is a schematic structural diagram of the filter tower of an embodiment of the present application from a top perspective.

[0028] Figure 3 It is a structural schematic diagram of the filter tower of an embodiment of the present application from a bottom perspective.

[0029] Figure 4 It is a structural diagram of the slide 1 according to an embodiment of the present application.

[0030] Figure numerals: 1. filter tower; 2. inner tower; 3. outer tower; 4. partition 1; 5. liquid inlet chamber; 6. liquid outlet chamber; 7. partition 2; 8. filter chamber; 9. pickling chamber; 10. backwash chamber; 11. central axis; 12. liquid inlet pipe; 13. liquid outlet hole; 14. liquid inlet 1; 15. liquid outlet 2; 16. liquid inlet 2; 17. filter material channel; 18. liquid flow hole; 19. filter material turntable; 20. slide 1; 21. slide 1; 22. metal sheet; 23. metal rod; 24. resistance wire; 25. insulation slot; 26. electromagnet. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The present invention discloses a copper wire drawing machine for cable production. The machine includes a lubrication tank and a filter tower 1. The filter tower 1 is located at the bottom of the lubrication tank. The lubrication tank is filled with lubricating fluid, a drawing die is positioned within the lubrication tank, and copper wire is drawn within the lubrication tank. A pouring pipe is located above the lubrication tank, through which lubricating fluid flows into the lubrication tank, continuously contacting the copper wire during the drawing process.

[0033] In this embodiment, the lubricating fluid is a water-based lubricating fluid comprising water, an organic lubricant and / or an inorganic lubricant, and a defoaming agent. A weak base, such as triethanolamine, is added to the water-based lubricating fluid in this embodiment. Triethanolamine has rust-preventing properties and can remove organic impurities and oils from the lubricating fluid.

[0034] The filter tower 1 includes an inner tower 2 and an outer tower 3 arranged around the inner tower 2. Preferably, the cross-sections of the inner tower 2 and the outer tower 3 are both circular. Two partitions 4 are symmetrically fixed in the outer tower 3, one end of the partition 4 is fixed to the inner circumference of the outer tower 3, and the other end is fixed to the outer circumference of the inner tower 2. The two partitions 4 divide the outer tower 3 into two semi-annular liquid inlet chambers 5 and liquid outlet chambers 6. The inner tower 2 is used to filter the lubricating fluid. Three partitions 27 are fixed in the inner tower 2 to divide the inner tower 2 into three fan-shaped chambers; the partition 27 extends from the axis of the inner tower 2 to the inner circumference of the inner tower 2; the three partitions 27 are fixed at the axis of the inner tower 2, and are respectively fixed to the inner circumference of the inner tower 2. The three fan-shaped chambers are the filtration chamber 8, the pickling chamber 9 and the backwash chamber 10. A central axis 11 is vertically fixed at the axis of the inner tower 2, and the three partitions 27 are respectively fixed to the central axis 11.

[0035] Several liquid inlet pipes 12 are fixedly mounted within the liquid inlet chamber 5. One end of each pipe is fixedly connected to the inner circumference of the outer tower 3, and the other end is fixedly connected to the outer circumference of the inner tower 2. Several liquid outlet holes 13 are evenly distributed along the axial direction of each pipe, facing upward. The end surface of each pipe is provided with a liquid inlet hole. A liquid outlet port 1 is located at the bottom of the lubrication tank. This outlet port 1 is connected to the liquid inlet hole of the liquid inlet pipe 12 via a liquid pipe. A liquid pump 1 is installed on the liquid pipe. Specifically, the lubricating liquid to be filtered flows from the liquid pipe into the liquid inlet pipe 12 and then into the liquid inlet chamber 5, causing the liquid level in the liquid inlet chamber 5 to continuously rise.

[0036] A liquid inlet 14 is provided at the bottom end of the inner tower 2, located between the liquid inlet chamber 5 and the filter chamber 8. Specifically, after the lubricating liquid to be filtered enters the liquid inlet chamber 5, it flows into the filter chamber 8 through the liquid inlet 14, and the liquid levels in the liquid inlet chamber 5 and the filter chamber 8 rise synchronously. A liquid outlet 15 is provided at the top end of the inner tower 2, located between the filter chamber 8 and the liquid outlet chamber 6. Specifically, in the filter chamber 8, the level of the filtered lubricating liquid continues to rise, and after reaching the height of the liquid outlet 15, it flows into the liquid outlet chamber 6. A liquid inlet 16 is provided at the top end of the inner tower 2, located between the liquid outlet chamber 6 and the backwash chamber 10. The filtered lubricating liquid flows into the backwash chamber 10 through the liquid inlet 16. A liquid outlet pipe 1 is fixedly provided on the outer peripheral wall of the outer tower 3, which is connected to the liquid outlet chamber 6, and the filtered lubricating liquid flows out through the liquid outlet pipe 1. A liquid outlet pipe 2 is fixedly provided on the outer peripheral wall of the inner tower 2, which is connected to the backwash chamber 10.

[0037] A pickling liquid inlet pipe is fixedly provided at the top of the pickling chamber 9, and a pickling liquid outlet pipe is fixedly provided at the bottom. The pickling liquid inlet pipe injects pickling liquid into the pickling chamber 9. In this embodiment, the pickling liquid is citric acid.

[0038] A filter channel 17 is horizontally arranged in the inner tower 2. The cross section of the filter channel 17 is circular, and the outer peripheral surface of the filter channel 17 is fixedly connected to the inner peripheral surface of the inner tower 2, and the filter channel 17 is arranged through three partitions 7. The filter channel 17 is located in the filter chamber 8, the pickling chamber 9 and the backwash chamber 10, and liquid flow holes 18 are respectively opened vertically therethrough. A filter turntable 19 is rotatably arranged in the filter channel 17. Three filter bins are opened along the circumference of the filter turntable 19, and the filter bins are used to place filter materials. Filter screens are fixed on the top and bottom surfaces of the filter bin, and specifically, the lubricating liquid flows into the filter bin through the liquid flow holes 18 and contacts the filter material. The filter turntable 19 rotates periodically, and when it stops rotating, the three filter bins are respectively aligned with the liquid flow holes 18. The filter material adopts ceramic filter material, such as alumina fiber ceramic.

[0039] Preferably, the inner circumference of the filter channel 17 and the outer circumference of the filter turntable 19 are coated with a waterproof coating, and the cross-sectional area of ​​the liquid flow hole 18 is smaller than the cross-sectional area of ​​the filter bin to reduce the situation where liquid enters the adjacent chamber through the filter channel 17.

[0040] A drive motor is fixed to the top of the central shaft 11, and the drive shaft is coaxially connected to the end of the drive motor's output shaft. The drive shaft is rotatably mounted within the central shaft 11 and extends through the filter media rotating disk 19, which is fixedly connected to the drive shaft. Preferably, the central shaft 11 is divided into an upper and lower section by the filter media channel 17, and the drive shaft is connected to the upper and lower sections of the central shaft 11, respectively.

[0041] Specifically, the lubricating fluid to be filtered enters filter chamber 8 through liquid inlet 14. As the liquid level rises, it enters the filter media bin within filter chamber 8, where it comes into contact with the filter material. Copper powder and other metal particles in the lubricating fluid are trapped by the filter material within filter chamber 8. The lubricating fluid above filter media turntable 19, after being filtered, enters liquid outlet chamber 6 through liquid outlet 2 15.

[0042] Specifically, after filter media turntable 19 rotates, the filter media bin, initially located in filter chamber 8, rotates into pickling chamber 9. Through contact with the pickling liquid, metal oxides and some metal particles within the filter media are removed. It should be noted that after the lubricating liquid leaves liquid outlet chamber 6, a weak base is added to raise the pH of the water-based lubricating liquid.

[0043] Specifically, the filter media bin in the pickling chamber 9 rotates and enters the backwash chamber 10. The filtered lubricating fluid enters the backwash chamber 10 from the liquid outlet chamber 6, flushing the filter media to further remove solid particles adsorbed within the filter media. The lubricating fluid in the backwash chamber 10 is discharged through the liquid outlet pipe 2.

[0044] Inner tower 2 is provided with a sliding vane 20 slidably mounted between filter chamber 8 and liquid inlet chamber 5, and a sliding vane 2 slidably mounted between filter chamber 8 and liquid outlet chamber 8. Specifically, a sliding groove 21 is provided on the sidewall of inner tower 2 between filter chamber 8 and liquid inlet chamber 5. Sliding vane 20 slides within sliding groove 21, with both ends of sliding vane 20 contacting the unfiltered lubricating fluid and the filtered lubricating fluid, respectively. Because the unfiltered lubricating fluid contains solid particles and has a higher density than the filtered lubricating fluid, a pressure differential exists across sliding vane 20, and this pressure differential is directed toward filter chamber 8. Inner tower 2 is provided with a sliding groove 2 on the sidewall between filter chamber 8 and liquid outlet chamber 8. Sliding vane 2 slides within sliding groove 2, with both ends of sliding vane 2 contacting the filtered lubricating fluid in filter chamber 8 and liquid outlet chamber 8, respectively. Because the liquid level in liquid outlet chamber 8 is lower, a pressure differential exists across sliding vane 2, and this pressure differential is directed toward liquid outlet chamber 8. It should be noted that the sliding vane 1 20 and the sliding vane 2 are both arranged above the filter material channel 17 .

[0045] Electromagnetic switch 1 and electromagnetic switch 2 are installed in the connection circuit between the drive motor and the power supply. Control assembly 1 for controlling electromagnetic switch 1 is installed between slide 1 20 and slide slot 1 21, and control assembly 2 for controlling electromagnetic switch 2 is installed between slide 2 and slide slot 2. Control assembly 1 and control assembly 2 have the same structure. Control assembly 1 includes a metal sheet 22 fixed to the outer circumference of slide 1 20, a metal rod 23 fixed within slide slot 1 21, and a resistance wire 24 in contact with metal sheet 22. Specifically, an insulating groove 25 is defined within the slide slot, and metal sheet 22 is slidably disposed within the insulating groove 25. Resistance wire 24 is wound around the inner circumference of insulating groove 25, and metal rod 23 is fixed axially within the insulating groove 25. Metal sheet 22 is sleeved around the circumference of metal rod 23 and is in electrical contact with metal rod 23. Terminals are provided at both ends of resistance wire 24 and at least one end of metal rod 23.

[0046] Furthermore, as the filtration capacity of the filter material decreases, the density of the lubricating fluid within the filter chamber 8 increases, causing slider 1 20 to move toward the inlet chamber 5 and slider 2 toward the outlet chamber 8. In this embodiment, the metal rods 23 within control components 1 and 2 are each provided with terminals at the ends facing away from the filter chamber 8 and connected to an electrical circuit. Movement of slider 1 20 toward the inlet chamber 5 and of slider 2 toward the outlet chamber 8 increase the resistance of the circuits connected to control components 1 and 2, respectively.

[0047] Control Component 1 and Control Component 2 are connected to Electromagnetic Switch 1 and Electromagnetic Switch 2, respectively, via a comparator and a relay. Specifically, the terminals of the resistor wire 24 within Control Component 1 are connected to a power source; the terminals of the metal rod 23 are connected to the non-inverting input of the comparator, and the inverting input of the comparator is connected to a reference voltage; the output of the comparator is connected to the relay coil, and Electromagnetic Switch 1 is connected to the normally open contact of the comparator. When Slide 1 20 moves away from the filter chamber 8, the input voltage received by the comparator increases. When the input voltage exceeds the reference voltage, the relay controls Electromagnetic Switch 1 to close. Electromagnetic Switch 2 is connected to Control Component 2 in the same manner as Electromagnetic Switch 1. When Slide 2 moves toward the liquid outlet chamber 8, the relay controls Electromagnetic Switch 2 to close.

[0048] It should be noted that the drive motor is a stepper motor; after electromagnetic switch 1 and electromagnetic switch 2 are closed, the drive motor controller is energized and sends a pulse signal of fixed intensity to the drive motor. The output shaft of the drive motor stops rotating after rotating a unit angle, causing the filter material turntable 19 to rotate 120°, and the filter material bin stops moving after moving to the adjacent chamber.

[0049] An electromagnet 26 is provided in the control component 1 and / or the control component 2. When the electromagnet 26 is energized, the metal sheet 22 is attracted to move the metal sheet 22 toward the filter chamber 8, thereby disconnecting the control component 1 and / or the control component 2. The electromagnet 26 is connected to the power supply via a contact switch, and the contact switch is provided on the inner surface of the filter channel 17. Three contact slots for cooperating with the control switch are evenly distributed along the circumference of the filter turntable 19. When the filter turntable 19 stops rotating, the contact switch is aligned with the contact slot and the contact switch is closed; when the filter turntable 19 rotates, the contact switch leaves the contact slot and is pressed by the surface of the filter turntable 19, and the contact switch is in the disconnected state. Preferably, the end of the contact switch is set to a rounded corner so that after the filter turntable 19 rotates, the contact switch leaves the contact slot.

[0050] The circuit connecting electromagnet 26 also includes a timer and relay. Specifically, the output of the timer is connected to the relay coil, and electromagnet 26 is connected to the normally open contact of the relay. When the contactor switch closes, the timer starts counting, and electromagnet 26 is energized and turned on. After the timer expires, it sends a low-level signal to the relay, which de-energizes electromagnet 26. Since the contactor disc has finished rotating, the backwashed filter material moves into the filter chamber 8. At this time, the lubricating fluid in the filter chamber 8 is still at a high density. The attraction of electromagnet 26 to metal sheet 22 reduces the resistance of the circuit connected to control component 1 and / or control component 2. When the comparator detects that the input voltage is lower than the reference voltage, it sends a low-level signal to the relay, which controls the opening of electromagnetic switch 1 and / or electromagnetic switch 2. Once the lubricating fluid density in the filter chamber 8 returns to normal, the timer expires, and electromagnet 26 is de-energized.

[0051] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A copper wire drawing machine for cable production, characterized in that: The invention comprises a filter tower (1), wherein the filter tower (1) comprises: An inner tower (2) and an outer tower (3), wherein the outer tower (3) is arranged around the inner tower (2); Partition 1 (4), the partition 1 (4) is fixedly arranged in the outer tower (3), and the partition 1 (4) divides the outer tower (3) into a liquid inlet chamber (5) and a liquid outlet chamber (6); A filter material turntable (19), the filter material turntable (19) being arranged in the inner tower (2), and filter material being arranged in the filter material turntable (19); A liquid inlet 1 (14) and a liquid outlet 2 (15), wherein the liquid inlet 1 (14) is arranged at the bottom end of the inner tower (2), and the liquid outlet 2 (15) is arranged at the top end of the inner tower (2); A liquid outlet pipe 1, the liquid outlet pipe 1 being arranged on the outer tower (3) and communicating with the liquid outlet chamber (6); A partition plate 2 (7) is fixedly provided in the inner tower (2), and the partition plate 2 (7) divides the inner tower (2) into a filter chamber (8) and a backwash chamber (10); the first liquid inlet (14) is located between the filter chamber (8) and the liquid inlet chamber (5); the second liquid outlet (15) is located between the filter chamber (8) and the liquid outlet chamber (6); a second liquid inlet (16) is provided at the top of the inner tower (2) between the liquid outlet chamber (6) and the backwash chamber (10); A filter material channel (17) is fixedly provided in the inner tower (2), and the filter material rotary disc (19) is rotatably arranged in the filter material channel (17); a filter material bin is provided in the filter material rotary disc (19), and the filter material is arranged in the filter material bin; a liquid flow hole (18) is provided through the filter material channel (17); when the filter material rotary disc (19) stops rotating, the filter material bin and the liquid flow hole (18) are aligned; A central shaft (11) is fixedly provided in the inner tower (2), a driving motor is fixedly provided at the top end of the central shaft (11), and a driving shaft is rotatably provided in the central shaft (11); the filter material turntable (19) is fixedly connected to the driving shaft; The inner tower (2) is provided with a chute (21) between the filter chamber (8) and the liquid inlet chamber (5), a slide plate (20) is slidably provided in the chute (21), an electromagnetic switch (1) is provided on the connection circuit between the drive motor and the power supply, a control switch (1) is provided on the slide plate (20), and the electromagnetic switch (1) is connected to the control switch (1); The control switch 1 comprises a metal sheet (22) fixed on the outer peripheral surface of the slide 1 (20), a metal rod (23) fixed in the slide groove 1 (21), and a resistance wire (24) in contact with the metal sheet (22); the metal sheet (22) is slidably connected to the metal rod (23).

2. A copper wire drawing machine for cable production according to claim 1, characterized in that: A plurality of liquid inlet pipes (12) are fixedly arranged in the liquid inlet chamber (5), and a plurality of liquid outlet holes (13) are opened on the liquid inlet pipes (12), and the liquid outlet holes (13) are arranged upward.

3. The copper wire drawing machine for cable production according to claim 1, characterized in that: A pickling chamber (9) is also provided in the inner tower (2). A pickling liquid inlet pipe is fixedly provided at the top of the pickling chamber (9), and a pickling liquid outlet pipe is fixedly provided at the bottom of the pickling chamber (9).

4. The copper wire drawing machine for cable production according to claim 1, characterized in that: The electromagnetic switch 1 is connected to the control switch 1 through a comparator and a relay.

5. The copper wire drawing machine for cable production according to claim 1, characterized in that: The inner tower (2) is provided with a second slide plate for sliding between the filter chamber (8) and the liquid outlet chamber (6); a second electromagnetic switch is provided on the connection circuit between the drive motor and the power supply, a second control component is provided on the second slide plate, and the second electromagnetic switch is connected to the second control component.

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