Water pressure control circuit and device and cleaning device of submerged chain conveyor

Abstract

The embodiment of the utility model discloses a water pressure control circuit and device and a cleaning device of a submerged chain conveyor. The water pressure control circuit comprises a water inlet electromagnetic valve, a water outlet electromagnetic valve, an emptying electromagnetic valve, an air inlet electromagnetic valve, a water inlet button, a water drainage button and a plurality of relays. When water needs to be fed, the normally open contact of the low-water-level relay is closed, so that the water inlet electromagnetic valve is electrified, the water outlet electromagnetic valve is de-energized, the emptying electromagnetic valve is electrified, and the air inlet electromagnetic valve is de-energized, water feeding of the water storage barrel is achieved, and when water needs to be discharged, the contact of the high-water-level switch is closed, the water inlet electromagnetic valve is de-energized, and the water outlet electromagnetic valve is electrified. When the submerged chain conveyor is washed, the emptying electromagnetic valve is powered off, the air inlet electromagnetic valve is powered on, constant-pressure water discharging is achieved through air pressure, the technical problems that in the prior art, when water is manually used for washing the submerged chain conveyor, the washing effect is poor and equipment is prone to being damaged due to the uncertainty of water pressure adjustment are solved, automatic pressurization, water feeding and water discharging are achieved, the labor cost is reduced, and the working efficiency is improved. And the flushing effect is improved.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of slag scoop cleaning, and in particular to a water pressure control circuit, device and a slag scoop cleaning device. Background Art

[0002] At present, speed measuring devices are installed on both sides of the guide wheel of the boiler slag removal system of thermal power plants to monitor the speed of the inner guide wheel so that operators can judge whether the slag removal machine chain is broken. The gap between the slag removal machine speed probe and the speed disk is about 1mm, but due to the poor operating environment of the slag removal machine area, the spilled ash, dust and bearing grease will cause the slag removal machine speed measuring device to frequently give false alarms, affecting the judgment of operators.

[0003] At present, the slag remover is mainly flushed manually with water. During flushing, if the water pressure is too low, the flushing will not be thorough. If the water pressure is too high, the speed probe or cable will be easily damaged. Utility Model Content

[0004] The embodiments of the utility model provide a water pressure control circuit, device and cleaning device for a slag remover, which solve the technical problems in the prior art of manually using water to flush the slag remover, resulting in poor flushing effect and easy damage to the equipment due to uncertainty in water pressure regulation.

[0005] The utility model embodiment provides a water pressure control circuit, the water pressure control circuit includes a water inlet solenoid valve, a water outlet solenoid valve, an emptying solenoid valve, an air inlet solenoid valve, a water inlet button, a water outlet button and a plurality of relays;

[0006] The water inlet button, the normally closed contact of the second relay, and the coil of the first relay are connected in sequence to form a first branch, and the first normally open contact of the first relay is connected in parallel with the water inlet button;

[0007] The drainage button, the normally closed contact of the first relay, and the coil of the second relay are connected in sequence to form a second branch, and the first normally open contact of the second relay is connected in parallel with the drainage button;

[0008] The second normally open contact of the first relay, the normally open contact of the low water level relay, the normally closed contact of the high water level relay and the coil of the third relay are connected in sequence to form a third branch, and the first normally open contact of the third relay is connected in parallel with the normally open contact of the low water level relay:

[0009] The second normally open contact of the third relay is connected in sequence with the water inlet solenoid valve to form a fourth branch, and the drain solenoid valve is connected in parallel with the water inlet solenoid valve;

[0010] The second normally open contact of the second relay, the normally open contact of the high water level relay, the normally closed contact of the low water level relay and the coil of the fourth relay are connected in sequence to form a fifth branch, and the normally closed contact of the fourth relay is connected in parallel with the normally open contact of the high water level relay;

[0011] The normally open contact of the fourth relay is connected in sequence with the water outlet solenoid valve to form a sixth branch, and the air intake solenoid valve is connected in parallel with the water outlet solenoid valve;

[0012] When the water inlet button is pressed, the water inlet solenoid valve is energized, the water outlet solenoid valve is de-energized, the emptying solenoid valve is energized, and the air intake solenoid valve is de-energized, thereby enabling water to enter the water storage barrel; when the drain button is pressed, the water inlet solenoid valve is de-energized, the water outlet solenoid valve is energized, the emptying solenoid valve is de-energized, and the air intake solenoid valve is energized to control the air intake of the water storage barrel, thereby enabling water to be discharged at a constant pressure using air pressure to flush the slag remover.

[0013] Furthermore, the water pressure control circuit also includes a local detection button;

[0014] The local detection button and the coil of the fifth relay are connected in sequence to form a seventh branch, and the first normally open contact of the fifth relay is connected in parallel with the local detection button.

[0015] Furthermore, the water pressure control circuit also includes an emptying button and an air intake button;

[0016] The water inlet button and the water inlet solenoid valve are connected in sequence to form an eighth branch;

[0017] The drainage button and the water outlet solenoid valve are connected in sequence to form a ninth branch;

[0018] The drain button and the drain solenoid valve are connected in sequence to form a tenth branch;

[0019] The air intake button and the air intake solenoid valve are connected in sequence to form an eleventh branch;

[0020] The eighth branch, the ninth branch, the tenth branch, and the eleventh branch are connected in parallel and then connected in series with the second normally open contact of the fifth relay.

[0021] Furthermore, the water pressure control circuit also includes a stop button;

[0022] The first branch, the second branch and the seventh branch are connected in parallel and then connected in series with the stop button.

[0023] The embodiment of the utility model further provides a water pressure control device, the water pressure control device comprising the water pressure control circuit described in any of the above embodiments, and further comprising: a water storage tank, a water inlet pipe, a drain pipe, an air inlet and an air outlet;

[0024] The water inlet pipe is arranged on one side of the water storage barrel; the drain pipe is arranged at the bottom of the water storage barrel; the air inlet and the air outlet are both arranged on the water storage barrel;

[0025] The water inlet solenoid valve in the water pressure control circuit is arranged at the water inlet pipe;

[0026] The water outlet solenoid valve in the water pressure control circuit is arranged at the drain pipe;

[0027] The air intake solenoid valve in the water pressure control circuit is arranged at the air intake port;

[0028] The drain solenoid valve in the water pressure control circuit is arranged at the exhaust port.

[0029] Furthermore, the water pressure control device also includes a high water level detection device;

[0030] The high water level detection device is electrically connected to the high water level relay in the water pressure control circuit.

[0031] Furthermore, the water pressure control device also includes a low water level detection device;

[0032] The low water level detection device is electrically connected to the low water level relay in the water pressure control circuit.

[0033] The embodiment of the utility model further provides a cleaning device for a slag scoop machine, the cleaning device for the slag scoop machine comprising the water pressure control device described in any of the above embodiments, and further comprising a cleaning controller;

[0034] The cleaning controller is electrically connected to the water pressure control device and is used to control the water pressure control device to start cleaning the slag remover.

[0035] The utility model discloses a water pressure control circuit, a device and a cleaning device for a slag picker. The water pressure control circuit includes a water inlet solenoid valve, a water outlet solenoid valve, an emptying solenoid valve, an air inlet solenoid valve, a water inlet button, a water discharge button and a plurality of relays. The utility model realizes water inflow to a water storage tank by closing the normally open contact of a low water level relay when water inflow is required, so that the water inlet solenoid valve is energized, the water outlet solenoid valve is de-energized, the emptying solenoid valve is energized, and the air inlet solenoid valve is de-energized. When water discharge is required, the high water level switch contact is closed, the water inlet solenoid valve is de-energized, the water outlet solenoid valve is energized, the emptying solenoid valve is de-energized, and the air inlet solenoid valve is energized, so that water discharge is realized by using air pressure constant pressure, and the technical problem that the flushing effect is poor and the equipment is easily damaged due to the uncertainty of water pressure regulation when manually using water to flush the slag picker in the prior art is solved, and the technical effect of automatic pressurization, water inflow and water discharge is realized, the labor cost is reduced, and the flushing effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of a water pressure control circuit provided by an embodiment of the utility model;

[0037] Figure 2 It is a schematic diagram of another water pressure control circuit provided by an embodiment of the utility model;

[0038] Figure 3 It is a schematic diagram of another water pressure control circuit provided by an embodiment of the utility model;

[0039] Figure 4 It is a structural diagram of a water pressure control device provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0041] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of the utility model are used to distinguish different objects, rather than to limit a specific order. The following embodiments of the utility model can be implemented separately, and the embodiments can also be implemented in combination with each other, and the embodiments of the utility model do not make specific limitations on this.

[0042] Figure 1 It is a schematic diagram of a water pressure control circuit provided by an embodiment of the utility model.

[0043] like Figure 1 The water pressure control circuit shown includes a water inlet solenoid valve MV1, a water outlet solenoid valve MV2, a drain solenoid valve MV3, an air intake solenoid valve MV4, a water inlet button T1, a drain button T2 and a plurality of relays.

[0044] The water inlet button T1, the normally closed contact J2-2 of the second relay, and the coil J1 of the first relay are connected in sequence to form a first branch 10, and the first normally open contact J1-11 of the first relay is connected in parallel with the water inlet button T1.

[0045] The drain button T2, the normally closed contact J1-2 of the first relay, and the coil J2 of the second relay are connected in sequence to form a second branch 20, and the first normally open contact J2-11 of the second relay is connected in parallel with the drain button T2.

[0046] The second normally open contact J1-12 of the first relay, the normally open contact LL-1 of the low water level relay, the normally closed contact HL-2 of the high water level relay and the coil J3 of the third relay are connected in sequence to form a third branch 30, and the first normally open contact J3-11 of the third relay is connected in parallel with the normally open contact LL-1 of the low water level relay.

[0047] The second normally open contact J3-12 of the third relay is connected in sequence with the water inlet solenoid valve MV1 to form a fourth branch 40, and the drain solenoid valve MV3 is connected in parallel with the water inlet solenoid valve MV1.

[0048] The second normally open contact J2-12 of the second relay, the normally open contact HL-1 of the high water level relay, the normally closed contact LL-2 of the low water level relay and the coil J4 of the fourth relay are connected in sequence to form the fifth branch 50, and the normally closed contact J4-2 of the fourth relay is connected in parallel with the normally open contact HL-1 of the high water level relay.

[0049] The normally open contact J4-1 of the fourth relay is connected in sequence with the water outlet solenoid valve MV2 to form a sixth branch 60, and the air intake solenoid valve MV4 is connected in parallel with the water outlet solenoid valve MV2.

[0050] When the water inlet button T1 is pressed, the water inlet solenoid valve MV1 is energized, the water outlet solenoid valve MV2 is de-energized, the emptying solenoid valve MV3 is energized, and the air intake solenoid valve MV4 is de-energized, thereby realizing the water intake of the water storage barrel; when the water discharge button T2 is pressed, the water inlet solenoid valve MV1 is de-energized, the water outlet solenoid valve MV2 is energized, the emptying solenoid valve MV3 is de-energized, and the air intake solenoid valve MV4 is energized to control the air intake of the water storage barrel, thereby realizing the water discharge by constant air pressure to flush the slag remover.

[0051] Specifically, see Figure 1 When the water inlet button T1 is pressed, the coil J1 of the first relay is energized, and the first normally open contact J1-11 of the first relay is closed, so that after the water inlet button T1 is pressed once and then disconnected, the first branch 10 can continue to be connected; the second normally open contact J1-12 of the first relay in the third branch 30 is closed, and when the water level of the water tank drops to the low water level detection device, the normally open contact LL-1 of the low water level relay is triggered to close, and the normally closed contact HL-2 of the high water level relay does not act, then the coil of the third relay J3 is energized, the second normally open contact J3-12 of the third relay in the fourth branch 40 is closed, the water inlet solenoid valve MV1 is energized, and the emptying solenoid valve MV3 is energized. At the same time, the detection point at the high water level detection device does not detect the water level, then the normally open contact HL-1 of the high water level relay does not operate, then the coil J4 of the fourth relay is not energized, the normally open contact J4-1 of the fourth relay in the sixth branch 60 does not operate, the water outlet solenoid valve MV2 loses power, and the air intake solenoid valve MV4 loses power, thereby realizing the action of filling water into the water storage barrel.

[0052] See also Figure 1 When the water in the water storage tank reaches the detection point of the high water level detection device, the normally open contact HL-1 of the high water level relay in the fifth branch 50 is closed, the normally closed contact HL-2 of the high water level relay in the third branch 30 is disconnected, the third branch 30 is disconnected, the coil J3 of the third relay is de-energized, the second normally open contact J3-12 of the third relay in the fourth branch 40 is disconnected, the water inlet solenoid valve MV1 is de-energized, and the drain solenoid valve MV3 is de-energized. At the same time, if the drain button T2 is pressed, the coil J2 of the second relay is energized, and the first normally open contact J2-11 of the second relay is closed, so that after the drain button T2 is pressed once and then disconnected, the second branch 20 can continue to be connected; the second relay in the fifth branch 50 is de-energized. When the second normally open contact J2-12 of the electrical appliance is closed, the fifth branch 50 is connected, the coil J4 of the fourth relay is energized, and the normally closed contact J4-2 of the fourth relay is closed. Then, when the water in the water storage tank is drained and the water level drops, and the detection point of the high water level detection device cannot detect the water level, the normally open contact HL-1 of the high water level relay is disconnected, and the fifth branch 50 can continue to be connected through the line where the normally closed contact J4-2 of the fourth relay is located; since the coil J4 of the fourth relay is energized, the normally open contact J4-1 of the fourth relay in the sixth branch 60 is closed, the water outlet solenoid valve MV2 is energized, and the air intake solenoid valve MV4 is energized to control the air intake of the water storage tank, thereby realizing the water outlet at a constant pressure using air pressure to flush the slag remover.

[0053] It can be seen that in the process of flushing the slag remover, due to the control of the air intake solenoid valve MV4, the air pressure can be used to achieve constant water pressure. At the same time, since the detection points of the high water level detection device and the low water level detection device are fixed, the amount of water entering each time is also fixed, and the amount of water for drainage and cleaning is also fixed. Not only the water pressure is constant, but also the water volume is constant, which has the effect of saving water and energy.

[0054] The utility model realizes water inflow to the water storage tank by closing the normally open contacts of the low water level relay when water inflow is needed, so that the water inlet solenoid valve is energized, the water outlet solenoid valve is de-energized, the emptying solenoid valve is energized, and the air intake solenoid valve is de-energized; when water discharge is needed, the high water level switch contacts are closed, the water inlet solenoid valve is de-energized, the water outlet solenoid valve is energized, the emptying solenoid valve is de-energized, and the air intake solenoid valve is energized, so that water discharge is achieved by utilizing constant air pressure, thus solving the technical problems in the prior art of manually using water to flush the slag scoop machine and causing poor flushing effect and easy damage to the equipment due to uncertainty in water pressure regulation, thus realizing the technical effects of automatic pressurization, water inflow and water discharge, reducing labor costs, and improving flushing effect.

[0055] Figure 2 It is a schematic diagram of another water pressure control circuit provided by an embodiment of the utility model.

[0056] like Figure 2As shown, the water pressure control circuit also includes a local detection button T3;

[0057] The local detection button T3 and the coil J5 of the fifth relay are connected in sequence to form a seventh branch 70, and the first normally open contact J5-11 of the fifth relay is connected in parallel with the local detection button T3.

[0058] Alternatively, if Figure 2 As shown, the water pressure control circuit also includes an emptying button T4 and an air intake button T5;

[0059] The water inlet button T1 and the water inlet solenoid valve MV1 are connected in sequence to form the eighth branch 80; the water drain button T2 and the water outlet solenoid valve MV2 are connected in sequence to form the ninth branch 90; the emptying button T4 and the emptying solenoid valve MV3 are connected in sequence to form the tenth branch 100; the air intake button T5 and the air intake solenoid valve MV4 are connected in sequence to form the eleventh branch 110; the eighth branch 80, the ninth branch 90, the tenth branch 100 and the eleventh branch 110 are connected in parallel and then connected in series with the second normally open contact J5-12 of the fifth relay.

[0060] Specifically, when the local detection button T3 is pressed, it indicates that the local detection of the pressurization control circuit can be started. At this time, the coil J5 of the fifth relay is energized, the seventh branch 70 is connected, and the first normally open contact J5-11 of the fifth relay is closed, so that after the local detection button T3 is pressed once and then disconnected, the seventh branch 70 can continue to be connected; then the second normally open contact J5-12 of the fifth relay is closed. At this time, any one of the buttons in the eighth branch 80, the ninth branch 90, the tenth branch 100, and the eleventh branch 110 can be pressed to realize the detection of the solenoid valve on the corresponding branch. For example, if the drain button T2 is pressed at this time, the ninth branch 90 is connected, and the water outlet solenoid valve MV2 is energized. By detecting whether the energized water outlet solenoid valve MV2 can work normally, the detection of the water outlet solenoid valve MV2 is realized.

[0061] Figure 3 This is a schematic diagram of another water pressure control circuit provided by an embodiment of the utility model.

[0062] like Figure 3 As shown, the water pressure control circuit also includes a stop button T6; the first branch 10, the second branch 20, and the seventh branch 70 are connected in parallel and then connected in series with the stop button T6.

[0063] Specifically, whether during the water intake or drainage process, if necessary, such as a sudden failure, the staff can press the stop button T6, and the first branch 10, the second branch 20, and the seventh branch 70 will be disconnected. Correspondingly, the branches where the contacts of the first relay, the second relay, and the fifth relay are located will be disconnected, and all solenoid valves will lose power, thereby protecting the water pressure control circuit.

[0064] Figure 4 It is a structural diagram of a water pressure control device provided in an embodiment of the utility model.

[0065] like Figure 4 As shown, the water pressure control device includes a water pressure control circuit ( Figure 4 The diagram of the water pressure control circuit is not shown due to viewing angle), and further includes: a water storage tank 41, a water inlet pipe 42, a drain pipe 43, an air inlet 44 and an air outlet 45;

[0066] The water inlet pipe 42 is arranged at one side of the water storage barrel 41 ; the drain pipe 43 is arranged at the bottom of the water storage barrel 41 ; the air inlet 44 and the air outlet 45 are both arranged on the water storage barrel 41 .

[0067] The water inlet solenoid valve MV1 in the water pressure control circuit is set at the water inlet pipe 42; the water outlet solenoid valve MV2 in the water pressure control circuit is set at the drain pipe 43; the air intake solenoid valve MV4 in the water pressure control circuit is set at the air inlet 44; the exhaust solenoid valve MV3 in the water pressure control circuit is set at the sub-exhaust port 45.

[0068] Alternatively, if Figure 4 As shown, the water pressure control device further includes a high water level detection device HL; the high water level detection device HL is electrically connected to the high water level relay in the water pressure control circuit.

[0069] Alternatively, if Figure 4 As shown, the water pressure control device also includes a low water level detection device LL; the low water level detection device LL is electrically connected to the low water level relay in the water pressure control circuit.

[0070] Specifically, the water storage barrel 41 is used to store water, and its volume can be freely selected according to different usage scenarios; the water inlet solenoid valve MV1 is used to control the water inlet to the water storage barrel 41. When the water inlet solenoid valve MV1 is energized, water enters the water storage barrel 41. When the water inlet solenoid valve MV1 is de-energized, the water storage barrel 41 stops inletting water; the water outlet solenoid valve MV2 is used to control the drainage of the water storage barrel 41. When the water outlet solenoid valve MV2 is energized, the water storage barrel 41 is drained to clean the slag remover. When the water outlet solenoid valve MV2 is de-energized, the water storage barrel 41 stops draining; the emptying solenoid valve MV3 is used to control the discharge of air from the upper part of the water barrel 41 when the water barrel 41 takes in water. The emptying solenoid valve MV3 is energized, and the upper part of the water barrel 41 is connected to the atmosphere. The emptying solenoid valve MV3 is de-energized, and the upper part of the water barrel 41 is isolated from the atmosphere. The air intake solenoid valve MV4 is used to control the compressed air to enter the upper part of the water barrel 41, exerting pressure to force the water in the water barrel 41 to reach a set pressure. The air intake solenoid valve MV4 is energized, and compressed air enters the water barrel 41. The air intake solenoid valve MV4 is de-energized, and the compressed air is isolated from the water barrel 41.

[0071] The high water level detection device HL is used to close the contacts of the high water level relay when the water level in the water storage tank 41 reaches the set high water level line; the low water level detection device LL is used to close the contacts of the low water level relay when the water level in the water storage tank 41 reaches the set low water level line.

[0072] See also Figure 4 When the control mode of the water pressure control device is switched to automatic control, when the contacts of the low water level relay are closed, the water inlet solenoid valve MV1 is energized, the water outlet solenoid valve MV2 is de-energized, the drain solenoid valve MV3 is energized, and the air inlet solenoid valve MV4 is de-energized. When the contacts of the high water level relay are closed, the water inlet solenoid valve MV1 is de-energized, the water outlet solenoid valve MV2 is energized, the drain solenoid valve MV3 is de-energized, and the air inlet solenoid valve MV4 is energized.

[0073] The water pressure control device provided in the embodiment of the utility model includes the water pressure control circuit in the above embodiment. Therefore, the water pressure control device provided in the embodiment of the utility model also has the beneficial effects described in the above embodiment, which will not be repeated here.

[0074] An embodiment of the utility model also provides a cleaning device for a slag scoop machine, which includes the water pressure control device in any of the above embodiments and also includes a cleaning controller; the cleaning controller is electrically connected to the water pressure control device and is used to control the water pressure control device to start cleaning the slag scoop machine.

[0075] The cleaning device of the slag scoop machine provided in the embodiment of the utility model includes the water pressure control device in the above embodiment. Therefore, the cleaning device of the slag scoop machine provided in the embodiment of the utility model also has the beneficial effects described in the above embodiment, which will not be repeated here.

[0076] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] Finally, it should be noted that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A water pressure control circuit, characterized in that: The water pressure control circuit includes a water inlet solenoid valve, a water outlet solenoid valve, a drain solenoid valve, an air inlet solenoid valve, a water inlet button, a drain button and a plurality of relays; The water inlet button, the normally closed contact of the second relay, and the coil of the first relay are connected in sequence to form a first branch, and the first normally open contact of the first relay is connected in parallel with the water inlet button; The drainage button, the normally closed contact of the first relay, and the coil of the second relay are connected in sequence to form a second branch, and the first normally open contact of the second relay is connected in parallel with the drainage button; The second normally open contact of the first relay, the normally open contact of the low water level relay, the normally closed contact of the high water level relay and the coil of the third relay are connected in sequence to form a third branch, and the first normally open contact of the third relay is connected in parallel with the normally open contact of the low water level relay: The second normally open contact of the third relay is connected in sequence with the water inlet solenoid valve to form a fourth branch, and the drain solenoid valve is connected in parallel with the water inlet solenoid valve; The second normally open contact of the second relay, the normally open contact of the high water level relay, the normally closed contact of the low water level relay and the coil of the fourth relay are connected in sequence to form a fifth branch, and the normally closed contact of the fourth relay is connected in parallel with the normally open contact of the high water level relay; The normally open contact of the fourth relay is connected in sequence with the water outlet solenoid valve to form a sixth branch, and the air intake solenoid valve is connected in parallel with the water outlet solenoid valve; When the water inlet button is pressed, the water inlet solenoid valve is energized, the water outlet solenoid valve is de-energized, the emptying solenoid valve is energized, and the air intake solenoid valve is de-energized, thereby allowing water to enter the water storage barrel; when the drain button is pressed, the water inlet solenoid valve is de-energized, the water outlet solenoid valve is energized, the emptying solenoid valve is de-energized, and the air intake solenoid valve is energized to control air intake in the water storage barrel, thereby allowing water to be discharged at a constant pressure using air pressure to flush the slag remover.

2. The water pressure control circuit according to claim 1, characterized in that: The water pressure control circuit also includes a local detection button; The local detection button and the coil of the fifth relay are connected in sequence to form a seventh branch, and the first normally open contact of the fifth relay is connected in parallel with the local detection button.

3. The water pressure control circuit according to claim 2, characterized in that: The water pressure control circuit also includes an emptying button and an air intake button; The water inlet button and the water inlet solenoid valve are connected in sequence to form an eighth branch; The drainage button and the water outlet solenoid valve are connected in sequence to form a ninth branch; The drain button and the drain solenoid valve are connected in sequence to form a tenth branch; The air intake button and the air intake solenoid valve are connected in sequence to form an eleventh branch; The eighth branch, the ninth branch, the tenth branch, and the eleventh branch are connected in parallel and then connected in series with the second normally open contact of the fifth relay.

4. The water pressure control circuit according to claim 2, characterized in that: The water pressure control circuit also includes a stop button; The first branch, the second branch and the seventh branch are connected in parallel and then connected in series with the stop button.

5. A water pressure control device, characterized in that: The water pressure control device comprises the water pressure control circuit according to any one of claims 1 to 4 above, and further comprises: a water storage tank, a water inlet pipe, a drain pipe, an air inlet and an air outlet; The water inlet pipe is arranged on one side of the water storage barrel; the drain pipe is arranged at the bottom of the water storage barrel; the air inlet and the air outlet are both arranged on the water storage barrel; The water inlet solenoid valve in the water pressure control circuit is arranged at the water inlet pipe; The water outlet solenoid valve in the water pressure control circuit is arranged at the drain pipe; The air intake solenoid valve in the water pressure control circuit is arranged at the air intake port; The drain solenoid valve in the water pressure control circuit is arranged at the exhaust port.

6. The water pressure control device according to claim 5, characterized in that: The water pressure control device also includes a high water level detection device; The high water level detection device is electrically connected to the high water level relay in the water pressure control circuit.

7. The water pressure control device according to claim 5, characterized in that: The water pressure control device also includes a low water level detection device; The low water level detection device is electrically connected to the low water level relay in the water pressure control circuit.

8. A cleaning device for a slag remover, characterized in that: The cleaning device of the slag scoop machine comprises the water pressure control device according to any one of claims 5 to 7 above, and also comprises a cleaning controller; The cleaning controller is electrically connected to the water pressure control device and is used to control the water pressure control device to start cleaning the slag remover.

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