A control method for a brake valve block

Abstract

The application provides a control method of a brake valve block for controlling a brake of a winch, which comprises the winch, a brake device connected with the winch, an oil path communication device, a one-way valve, a two-way valve, an oil inlet and an oil tank, the oil path communication device comprises an electromagnetic valve one and an electromagnetic valve two, the winch is provided with a steel wire rope, and the steel wire rope is connected with a hoisted object; the application is simple in operation and reliable in control, so as to guarantee the safety of on-site operators.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crane hydraulic control, in particular to a brake valve block control method. BACKGROUND

[0002] Nowadays, winches are needed in cranes to lift heavy objects, and the control of winches is generally realized by hydraulic control. With the continuous development and utilization of resources, hydraulic control technology is increasingly applied in resource collection links, such as winches for collecting and releasing cables of offshore cranes, traction mine cars applied in coal mine development, etc. The rotation of winches and the movement of mine cars are all realized by hydraulic control. In order to improve the safety of emergency braking of winches when the conventional brake fails, a brake control system and its control method are disclosed in the application number 202310249356.8, published on July 7, 2023. The brake control system comprises an oil tank, a main pump, a motor, a proportional overflow valve, a one-way valve, a one-way valve, a one-way valve, a one-way valve, a two-way valve, an oil inlet and an oil tank. The oil inlet and the oil outlet of the oil tank are communicated, the main pump and the motor are drivingly connected, the oil outlet of the main pump and the oil inlet of the one-way valve are communicated, the oil outlet of the one-way valve and the P port of the one-way valve are communicated, the B port of the one-way valve and the P port of the two-way valve are communicated, the A port of the two-way valve and the rodless cavity of the brake spring oil cylinder are communicated; the rodless cavity of the brake spring oil cylinder and the B port of the two-way valve are communicated, and the T port of the two-way valve and the oil tank are communicated.

[0003] The above document can make the oil of the oil tank flow to the rodless cavity through the two-way electromagnetic reversing valve to open the brake of the winch after the power supply of any one of the two parallel connected two-way electromagnetic reversing valves. In order to prevent the failure of the two-way electromagnetic reversing valve, an emergency brake electromagnetic reversing valve needs to be added, which makes the whole brake operation complex, and when one of the two-way electromagnetic reversing valves fails, the emergency brake valve needs to be started additionally to brake, which is complex in operation and control method. SUMMARY

[0004] The purpose of the present application is to provide a brake valve block control method, which is simple in operation and reliable in control, so as to protect the safety of the on-site workers.

[0005] In order to achieve the above purpose, a brake valve block control method is used to control the brake of a winch, which comprises a winch, a brake device connected with the winch, an oil passage communication device, a one-way valve, a two-way valve, an oil inlet and an oil tank. The oil passage communication device comprises an electromagnetic valve one and an electromagnetic valve two, the winch has a steel wire rope, and the steel wire rope is connected with a lifting object.

[0006] Further comprising the following steps:

[0007] S1 connects the external oil pump into the oil inlet, opens the pressure reducing valve, and makes the external liquid oil flow through the pressure reducing valve, so that the oil pressure of the liquid oil after the pressure reducing valve is reduced to the bearing range of the brake device;

[0008] S2 simultaneously energizes the electromagnetic valve one and the electromagnetic valve two, so that the liquid oil after the pressure reducing valve flows through the electromagnetic valve one and the electromagnetic valve two in turn;

[0009] S3 divides the liquid oil after flowing through the electromagnetic valve two into a first oil path and a second oil path, the first oil path flows to one end of the two-way valve, so that the second oil path flows through the check valve and is divided into a third oil path and a fourth oil path, the third oil path flows to the other end of the two-way valve, so that the oil pressures at both ends of the two-way valve are equal, and then the fourth oil path flows to the brake device;

[0010] S4 releases the brake of the winch by the brake device, so that the winch normally works and drives the lifting object to move upward or downward through the steel wire rope;

[0011] S5 after the lifting object reaches the target position, de-energizes the electromagnetic valve one or the electromagnetic valve two, so that the oil pressure of the first oil path connected with the electromagnetic valve two instantaneously decreases, an oil pressure difference is formed at both ends of the two-way valve, the liquid oil of the third oil path and the fourth oil path flows back to the two-way valve, and then flows back to the oil tank through the two-way valve;

[0012] S6 brakes the winch by the brake device, so that the winch stops rotating and the lifting object is stopped at the target position.

[0013] The above settings first pass the liquid oil through the pressure reducing valve, so that the oil pressure of the liquid oil is reduced to the bearing range of the brake device, avoiding damage to the brake device caused by high-pressure liquid oil; since the electromagnetic valve one and the electromagnetic valve two are connected in series, both of them need to be energized at the same time, so that the liquid oil after the pressure reducing valve is connected with the electromagnetic valve, and then flows to the check valve through the electromagnetic valve; the first oil path, the second oil path, the third oil path and the fourth oil path are set to make the oil pressure of the liquid oil at both ends of the check valve equal after flowing through the check valve, and then the liquid oil flows to the brake device through the fourth oil path to release the brake of the winch; after any one of the electromagnetic valves loses power, the fourth oil path connected with the brake device forms the same oil path with the third oil path and converges in the two-way valve, and the oil pressure of the first oil path connected with the two-way valve is greater, so that the liquid oil of the oil path connected with the brake device flows back to the oil tank through the two-way valve, and the winch is braked; in this process, since the electromagnetic valve one and the electromagnetic valve two are connected in series, only the two electromagnetic valves are energized at the same time to release the brake, effectively avoiding the brake release caused by the single electromagnetic valve in the control oil path, thereby ensuring the safety of the on-site operators.

[0014] Further, the P1 valve port of the electromagnetic valve one is connected with the oil inlet, the A1 valve port of the electromagnetic valve one is connected with the P2 valve port of the electromagnetic valve two, the A2 valve port of the electromagnetic valve two is connected with the input end of the one-way valve and the upper end of the two-way valve respectively, the output end of the one-way valve is connected with the lower end of the two-way valve and the brake device respectively, the T1 valve port of the electromagnetic valve one, the T2 valve port of the electromagnetic valve two and the B valve port of the two-way valve are all connected with the oil tank, and the brake device is released when the input oil way of the one-way valve reaches the brake device.

[0015] In step S2, the liquid oil after pressure reduction by the pressure reduction valve flows into the P1 valve port of the electromagnetic valve one, and flows out from the A1 valve port of the electromagnetic valve one after the electromagnetic valve one is powered on, and then flows to the P2 valve port of the electromagnetic valve two, and flows out from the A2 valve port of the electromagnetic valve two after the electromagnetic valve two is powered on.

[0016] In step S5, the liquid oil flows back to the oil tank through the T1 valve port of the electromagnetic valve one and the T2 valve port of the electromagnetic valve two after the electromagnetic valve one or the electromagnetic valve two is powered off.

[0017] The above setting, by setting the electromagnetic valve one and the electromagnetic valve two in series, so that when controlling the liquid oil to release the brake of the brake device, the electromagnetic valve one and the electromagnetic valve two need to be powered on at the same time to make the electromagnetic valve one and the electromagnetic valve two conduct at the same time, so that the liquid oil passing through the pressure reduction valve can flow through the electromagnetic valve one and the electromagnetic valve two to the one-way valve, and the two-way valve is connected with the two ends of the one-way valve, so that the liquid oil flowing through the two ends of the one-way valve has equal oil pressure, and then the liquid oil flows to the brake device to release the brake; and after the power of any one of the electromagnetic valves is lost, the oil pressure of the oil way connected with the brake device is greater than the oil pressure of the two-way valve, and then the liquid oil of the oil way connected with the brake device flows back to the oil tank through the two-way valve, thereby realizing the brake.

[0018] Further, the brake device comprises an oil storage tank, a spring one, a piston and a brake block, one end of the spring one is fixed at the bottom of the oil storage tank, the other end of the spring one is fixedly connected with one end of the piston arranged in the oil storage tank, the other end of the piston is fixedly connected with the brake block, the brake block abuts against the rotating shaft of the winch, and the piston divides the oil storage tank into an upper oil storage chamber and a lower oil storage chamber, the upper oil storage chamber is connected with the output end of the one-way valve.

[0019] In step S4, the fourth oil way liquid oil pushes the piston to compress the spring one, thereby driving the brake block to separate from the rotating shaft of the winch, so that the winch rotates normally.

[0020] In step S6, the oil pressure of the fourth oil way liquid oil is reduced, and the piston is reversely moved under the action of the spring one, thereby driving the brake block to abut against the rotating shaft of the winch, so that the winch stops rotating.

[0021] The above configuration allows hydraulic oil to flow directly into the upper oil reservoir through the one-way valve when the winch brake needs to be released. This hydraulic oil then exerts a downward force on the piston, compressing the spring and causing the piston to move downward, thus disengaging the brake block from the winch shaft and releasing the brake.

[0022] Furthermore, the two-way valve is equipped with a second spring and a connecting block inside. One end of the second spring is fixedly connected to the top of the two-way valve, and the other end of the second spring is fixedly connected to the connecting block. The connecting block divides the interior of the two-way valve into a first chamber and a second chamber.

[0023] The above settings allow the hydraulic oil to flow into the two-way valve, which in turn pushes the connecting block to compress or stretch the second spring, thereby adjusting the oil pressure in the oil circuit connected to the brake device.

[0024] Furthermore, a B valve port is provided on one side of the first chamber, which is connected to the oil tank. The output end of the one-way valve is connected to the upper end of the first chamber, and the lower end of the second chamber is connected to the output end of the one-way valve.

[0025] In step S3, the first oil circuit is connected to the second chamber, and the third oil circuit is connected to the first chamber. The oil in the first oil circuit pushes the connecting block to move towards the first chamber to block the B valve port. Then, under the action of the first oil circuit and the third oil circuit, the connecting block is in a balanced state in the two-way valve.

[0026] The above setup, when braking is not required, ensures that the oil pressure at both ends of the check valve is equal by connecting the second chamber to the output end of the check valve and the output end of the check valve to the first chamber. This allows the oil flowing directly into the upper reservoir, exerting a downward force on the piston and compressing spring one, thus moving the piston downward and disengaging the brake block from the winch shaft, releasing the brake. When braking is required, disconnecting either solenoid valve one or solenoid valve two reduces the oil pressure in the second chamber connected to the input end of the check valve, making the oil pressure in the first chamber greater than that in the second chamber. This pushes the connecting block upward, compressing spring two. The oil in the first chamber flows out from valve port B, further reducing its pressure. This makes the hydraulic pressure in the upper reservoir greater than that in the first chamber, causing the oil in the upper reservoir to flow into the first chamber through the oil passage under the force of spring one, and then flow back to the oil tank through valve port B. Spring one then pushes the piston upward, causing the brake block to abut against the winch shaft, achieving braking.

[0027] Furthermore, one end of the pressure reducing valve is connected to the oil inlet, and the other end of the pressure reducing valve is connected to the P1 valve port of the solenoid valve.

[0028] The above settings facilitate the adjustment of external oil pressure to a range that the braking device can withstand via the pressure reducing valve.

[0029] Further, the electromagnetic valve one and the electromagnetic valve two are both two-position three-way valves.

[0030] The above arrangement can facilitate the connection of the input end and the output end through the control of the P port. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 The structure connection diagram of the present application.

[0032] Figure 2 The Figure 1 Enlarged view at D.

[0033] Figure 3 The Figure 1 Enlarged view at E.

[0034] Figure 4 The Figure 1 Enlarged view at F.

[0035] Figure 5 The working flow chart of the present application. DETAILED DESCRIPTION

[0036] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0037] As Figures 1 to 4 shown, a control method of a brake valve block includes a winch 1, a brake device connected with the winch 1, an oil path communication device, a two-way valve 6, an oil inlet 9 and an oil tank 10, the brake device is connected with one end of the oil path communication device and one end of the two-way valve 6 through a one-way valve 111 respectively, the other end of the oil path communication device is connected with the oil inlet 9 through a pressure reducing valve 8, the other end of the two-way valve 6 is connected with the oil tank 10.

[0038] As Figure 1 shown, the oil path communication device includes an electromagnetic valve one 71 and an electromagnetic valve two 72, the electromagnetic valve one 71 and the electromagnetic valve two 72 are connected in series, one end of the pressure reducing valve 8 is connected with the oil inlet 9, the other end of the pressure reducing valve 8 is connected with a P1 valve port of the electromagnetic valve one 71, an A1 valve port of the electromagnetic valve one 71 and a P2 valve port of the electromagnetic valve two 72 are connected in conduction to realize the series connection, so that the liquid oil passing through the pressure reducing valve 8 can pass through the two electromagnetic valves only when the two electromagnetic valves are powered at the same time, otherwise the liquid oil passing through the pressure reducing valve 8 cannot pass through the electromagnetic valve one 71 and the electromagnetic valve two 72 to be connected to the brake device to open the brake. In the embodiment, the electromagnetic valve one and the electromagnetic valve two are both two-position three-way valves.

[0039] As Figures 2-4As shown, when the brake device is released, the one-way valve input oil way reaches the brake device, the brake device includes an oil tank 4, a spring 1 51, a piston 5 and a brake block 3, one end of the spring 1 51 is fixed at the bottom of the oil tank 4, the other end of the spring 1 51 is fixedly connected with one end of the piston 5 arranged in the oil tank 4, the other end of the piston 5 is fixedly connected with the brake block 3, the brake block 3 abuts against the rotating shaft 2 of the winch 1, the piston 5 divides the oil tank 4 into an upper oil storage chamber 41 and a lower oil storage chamber 42, the upper oil storage chamber 41 is connected with the output end of the one-way valve, the two-way valve 6 is internally provided with a spring 2 52 and a connecting block 7, one end of the spring 2 52 is fixedly connected at the top of the two-way valve 6, the other end of the spring 2 52 is fixedly connected with the connecting block 7, the connecting block 7 divides the two-way valve 6 into a first chamber 61 and a second chamber 62, a B valve port is arranged at one side of the first chamber 61, the B valve port is connected with an oil tank 10, the output end of the one-way valve 111 is connected with the upper end of the first chamber 61, the lower end of the second chamber 62 is respectively connected with the input end of the one-way valve and an A2 valve port of the electromagnetic valve 2, a T1 valve port of the electromagnetic valve 1 71, a T2 valve port of the electromagnetic valve 2 72 and the B valve port of the two-way valve 6 are all connected with the oil tank 10; in this way, when the brake is not needed, through the connection of the second chamber 62 with the input end of the one-way valve 111 and the connection of the output end of the one-way valve 111 with the first chamber 61, the oil pressure through both ends of the one-way valve 111 is equal, the liquid oil passing through the one-way valve 111 directly flows into the upper oil storage chamber 41, the downward force of the piston 5 is generated to compress the spring 1 51, thereby driving the piston 5 to move downward, so that the brake block 3 is separated from the rotating shaft 2 of the winch 1, and the brake is released; when the brake is needed, after one of the electromagnetic valve 1 71 and the electromagnetic valve 2 72 is disconnected, the oil pressure of the second chamber 62 connected with the input end of the one-way valve 111 is reduced, so that the oil pressure of the first chamber 61 is greater than that of the second chamber 62, thereby driving the connecting block 7 to move upward to compress the spring 2 52, the liquid oil of the first chamber 61 flows out from the B valve port, thereby reducing the oil pressure of the first chamber 61, so that the oil pressure in the upper oil storage chamber 41 is greater than that of the first chamber 61, thereby making the liquid oil in the upper oil storage chamber 41 flow into the first chamber 61 through the oil way under the action of the spring 1 51, and then flow back to the oil tank 10 through the B valve port, and then the piston 5 is driven by the spring 1 51 to move upward, so that the brake block 3 abuts against the rotating shaft 2 of the winch 1, and the brake is realized. In the embodiment, the oil inlet 9 is connected with an external oil pump (not marked in the figure).

[0040] Further comprising the following specific steps, such as Figure 5 As shown,

[0041] S1 connects the external oil pump to the oil inlet 9, opens the pressure reducing valve 8, and reduces the oil pressure of the liquid oil after flowing through the pressure reducing valve 8 to the bearing range of the brake device.

[0042] S2 energizes electromagnetic valve one 71 and electromagnetic valve two 72 at the same time, so that the hydraulic oil after pressure reduction by pressure reducing valve 8 flows into electromagnetic valve one 72 from P1 valve port of electromagnetic valve one 72, then flows out from A1 valve port of electromagnetic valve one 72, then flows to P2 valve port of electromagnetic valve two 73, and finally flows out from A2 valve port of electromagnetic valve two 73.

[0043] S3 divides the hydraulic oil flowing through electromagnetic valve two 73 into first oil path 11 and second oil path 22, the first oil path 11 flows to one end of two-way valve 6 connected with second chamber 62, then the second oil path 22 flows through check valve 111 and is divided into third oil path 33 and fourth oil path 44, the third oil path 33 flows to the other end of two-way valve 6 connected with first chamber 61, the hydraulic oil in first oil path 11 pushes connecting block 7 to move to the direction of first chamber 61 to block B valve port, then connecting block 7 is in a balanced state in two-way valve 6 under the action of first oil path 11 and third oil path 33, so that the oil pressure at both ends of two-way valve 6 is equal, and then the fourth oil path 44 flows to brake device;

[0044] S4 brake device releases the brake on winch 1, in this embodiment, hydraulic oil in fourth oil path 44 pushes piston 5 to compress spring one 51, and then drives brake block 3 to separate from rotating shaft 2 of winch 1, so that winch 1 rotates normally, and through steel wire rope (not marked in the figure) drives the hoisted object to move upward or downward;

[0045] S5 after the hoisted object reaches the target position, de-energize electromagnetic valve one 71 or electromagnetic valve two 72, so that the oil pressure of first oil path 11 connected with electromagnetic valve two 72 drops instantaneously, forming an oil pressure difference at both ends of two-way valve 6, so that the hydraulic oil in third oil path 33 and fourth oil path 44 flows back to two-way valve 6 and pushes connecting block 7 to move reversely to open B valve port, and then flows back to oil tank 10 through B valve port, and then the hydraulic oil in electromagnetic valve one 71 and electromagnetic valve two 72 flows back to the oil tank through T1 valve port of electromagnetic valve one 71 and T2 valve port of electromagnetic valve two 72 respectively;

[0046] S6 brake device brakes winch 1, in this embodiment, the oil pressure of hydraulic oil in fourth oil path 44 decreases, piston 5 reversely moves under the action of spring one 51, and then drives brake block 3 to abut against rotating shaft 2 of winch 1, so that winch 1 stops rotating, and then the hoisted object is stopped at the target position.

[0047] The working principle of the application is: when the brake needs to work, the liquid oil flows through the pressure reducing valve 8 through the oil inlet 9, and the oil pressure of the liquid oil is adjusted to the bearing range of the brake device, and then the liquid oil flows into the electromagnetic valve one 71, so that the electromagnetic valve one 71 and the electromagnetic valve two 72 are electrified at the same time, so that the electromagnetic valve one 71 and the electromagnetic valve two 72 are in series conduction, and the liquid oil flows through the electromagnetic valve one 71 and the electromagnetic valve two 72 to the one-way valve 111 in turn, and flows to the two-way valve 6 through the oil distribution path, the two ends of the two-way valve 6 are connected with the two ends of the one-way valve 11 respectively, so that the oil pressure of the liquid oil flowing through the two ends of the one-way valve 111 is equal, and then the liquid oil flows to the brake device, and the oil pressure of the upper oil storage chamber 41 of the oil storage tank 4 in the brake device is increased, so that the spring one 51 in the oil storage tank 4 is pressed down, the piston 5 drives the brake block 3 to move downward, so that the brake is loosened, and the winch 1 works normally; when the brake needs to stop working, one of the electromagnetic valve one 71 and the electromagnetic valve two 72 is de-energized or both are de-energized at the same time, so that the oil pressure of the second chamber 62 connected with the A2 valve port of the electromagnetic valve two 72 is reduced, the oil pressure of the first chamber 61 is greater than that of the second chamber 62, the connecting block 7 is pushed to move upward to compress the spring two 52, the liquid oil in the first chamber 61 flows out from the B valve port, so that the oil pressure of the first chamber 61 is reduced, the oil pressure of the brake device is greater than that of the first chamber 61, so that the liquid oil of the brake device flows into the first chamber 61 through the oil path, and then flows back to the oil tank 10 through the B valve port, finally the oil pressure of the brake device is reduced, so that the brake block 3 abuts against the rotating shaft 2 of the winch 1, and the brake is realized.

Claims

1. A control method for a brake valve block, used to control the brake of a winch, comprising a winch, a brake device connected to the winch, an oil circuit connection device, a one-way valve, a two-way valve, an oil inlet, and an oil tank. The oil circuit connection device includes a solenoid valve one and a solenoid valve two. A wire rope is wound around the winch and connected to the hoisted object. The P1 port of solenoid valve one is connected to the oil inlet, the A1 port of solenoid valve one is electrically connected to the P2 port of solenoid valve two, the A2 port of solenoid valve two is connected to the input end of the one-way valve and the upper end of the two-way valve respectively, and the output end of the one-way valve is respectively connected to the input end of the one-way valve and the upper end of the two-way valve respectively. The lower end of the two-way valve is connected to the braking device. The T1 port of solenoid valve one, the T2 port of solenoid valve two, and the B port of the two-way valve are all connected to the oil tank. The braking device includes an oil reservoir, a spring one, a piston, and a brake block. One end of the spring one is fixed to the bottom of the oil reservoir, and the other end of the spring one is fixedly connected to one end of the piston located inside the oil reservoir. The other end of the piston is fixedly connected to the brake block, which abuts against the winch's shaft. The piston divides the interior of the oil reservoir into an upper oil reservoir and a lower oil reservoir. The upper oil reservoir is connected to the output end of a one-way valve. Its characteristic is that: It also includes the following steps: S1 connects the external oil pump to the oil inlet and opens the pressure reducing valve, so that the pressure of the external oil after flowing through the pressure reducing valve is reduced to the range that the braking device can withstand. S2 simultaneously energizes solenoid valve one and solenoid valve two, causing the oil pressure-reduced by the pressure reducing valve to flow sequentially through solenoid valve one and solenoid valve two. The oil pressure-reduced by the pressure reducing valve flows into the P1 valve port of solenoid valve one. After solenoid valve one is energized, it flows out from the A1 valve port of solenoid valve one, and then flows to the P2 valve port of solenoid valve two. After solenoid valve two is energized, it flows out from the A2 valve port of solenoid valve two. S3 divides the hydraulic oil flowing through solenoid valve 2 into a first oil path and a second oil path. The first oil path flows to one end of the two-way valve, and the second oil path flows through the check valve and then divides into a third oil path and a fourth oil path. The third oil path flows to the other end of the two-way valve, so that the oil pressure at both ends of the two-way valve is equal. Then the fourth oil path flows to the brake device. The S4 brake device releases the brake on the winch, allowing the winch to operate normally and move the hoisted object up or down via the wire rope; the hydraulic oil in the fourth oil circuit pushes the piston to compress the spring, which in turn causes the brake block to disengage from the winch's shaft, allowing the winch to rotate normally. After the hoisted object reaches the target position, S5 de-energizes either solenoid valve one or solenoid valve two, causing the oil pressure in the first oil circuit connected to solenoid valve two to drop instantaneously. This creates an oil pressure difference across the two-way valve, causing the oil in the third and fourth oil circuits to flow back into the two-way valve and then back to the oil tank through the two-way valve. After solenoid valve one or solenoid valve two is de-energized, the oil flows back to the oil tank through the T1 valve port of solenoid valve one and the T2 valve port of solenoid valve two. The S6 braking device brakes the winch, stopping its rotation and bringing the hoisted object to the target position. The hydraulic pressure in the fourth oil circuit decreases, and under the force of the spring, the piston moves in the opposite direction, causing the brake block to abut against the winch shaft, thus stopping the winch's rotation.

2. The control method for a brake valve block according to claim 1, characterized in that: The two-way valve is equipped with a second spring and a connecting block inside. One end of the second spring is fixedly connected to the top of the two-way valve, and the other end of the second spring is fixedly connected to the connecting block. The connecting block divides the interior of the two-way valve into a first chamber and a second chamber.

3. The control method for a brake valve block according to claim 2, characterized in that: A B valve port is provided on one side of the first chamber, which is connected to the oil tank. The output end of the one-way valve is connected to the upper end of the first chamber, and the lower end of the second chamber is connected to the input end of the one-way valve. In step S3, the first oil circuit is connected to the second chamber, and the third oil circuit is connected to the first chamber. The oil in the first oil circuit pushes the connecting block to move towards the first chamber to block the B valve port. Then, under the action of the first oil circuit and the third oil circuit, the connecting block is in a balanced state in the two-way valve.

4. The control method for a brake valve block according to claim 1, characterized in that: One end of the pressure reducing valve is connected to the oil inlet, and the other end of the pressure reducing valve is connected to the P1 valve port of the solenoid valve.

5. The control method for a brake valve block according to claim 1, characterized in that: Both solenoid valve one and solenoid valve two are two-position three-way valves.

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