Brake control system

Abstract

The invention provides a brake control system which comprises a winch, a brake device connected with the winch, an oil way communicating device, a two-way valve, an oil inlet and an oil tank, the brake device is connected with one end of the oil way communicating device and one end of the two-way valve through one-way valves, and the other end of the oil way communicating device is connected with the oil inlet through a pressure reducing valve. According to the hydraulic control system for the winch, in the process of hydraulically controlling the winch, the situation that a brake is loosened mistakenly due to the single fault of a control oil way can be avoided, and then the reliability of the brake is improved.

Description

Technical Field

[0001] The invention relates to the technical field of crane brakes, and in particular to a brake control system. Background Art

[0002] With the development of social industry, the application of hydraulics is becoming more and more important. At present, brake control through hydraulic systems is commonly used in oil drilling rigs, well repairing machines, cranes, etc. For oil drilling rigs, with the increase of various supporting equipment, the existing brake handle automatically returns to the release position after the applied external force is cancelled, that is, when the hand is released, the brake state is automatically released, and the brake handle must be held by hand to maintain the brake state. Such operation is cumbersome and prone to safety problems. To solve this technical problem, a patent document with Chinese patent application number 202222536421.9 and announcement date 2022.12.06 discloses a control system for hydraulic disc brakes, including a brake handle and a button switch arranged on the brake handle; an electromagnetic reversing air valve pneumatically matched with the hydraulic disc brake safety pliers; a control component and a reset button connected to the control component.

[0003] In the above-mentioned document, under the control of the control component, when the button switch is not pressed, the entire hydraulic disc brake safety clamp is automatically in a locked state, so that when the brake handle is in a released state, the drilling rig is automatically in a braking state, and when the brake state is to be released, it can be directly pressed, thereby reducing safety hazards and making the drilling rig safer when it is stopped; however, in the application process of the crane winch, if the brake is released only by circuit connection, the brake can be released when the start button is pressed by mistake, so that a single fault is prone to occur in the control process, which will cause the winch brake to be released by mistake, affecting the reliability of the brake. Summary of the invention

[0004] The object of the present invention is to provide a brake control system which can avoid the brake being released incorrectly due to a single failure of the control oil circuit during the hydraulic control of the winch, thereby improving the reliability of the brake, and the oil circuit structure is simple.

[0005] To achieve the above object, a brake control system includes a winch, a brake device connected to the winch, an oil circuit connecting device, an oil inlet and an oil tank, and also includes a two-way valve, wherein the brake device is connected to one end of the oil circuit connecting device and one end of the two-way valve respectively through a one-way valve, the other end of the oil circuit connecting device is connected to the oil inlet through a pressure reducing valve, and the other end of the two-way valve is connected to the oil tank; The oil circuit connecting device includes a solenoid valve 1 and a solenoid valve 2, the solenoid valve 1 is connected in series with the solenoid valve 2, the P1 valve port of the solenoid valve 1 is connected to the oil inlet, the A1 valve port of the solenoid valve 1 is conductively connected to the P2 valve port of the solenoid valve 2, the A2 valve port of the solenoid valve 2 is respectively connected to the input end of the one-way valve and the upper end of the two-way valve, the output end of the one-way valve is respectively connected to the lower end of the two-way valve and the brake device, the T1 valve port of the solenoid valve 1, the T2 valve port of the solenoid valve 2 and the B valve port of the two-way valve are all connected to the oil tank, and the brake device is released when the one-way valve inputs the oil circuit to the brake device.

[0006] The above arrangement is to connect the solenoid valve one and the solenoid valve two in series, so that when controlling the liquid oil to release the brake device, it is necessary to control the solenoid valve one and the solenoid valve two to be energized at the same time, so that the solenoid valve one and the solenoid valve two can be turned on at the same time, so that the liquid oil passing through the pressure reducing valve can flow through the solenoid valve one and the solenoid valve two to the one-way valve, and the two-way valve is connected to the two ends of the one-way valve, so that the oil pressure flowing through the two ends of the one-way valve is equal, thereby allowing the liquid oil to flow to the brake device and release the brake; and when any solenoid valve loses power, it can make the solenoid valve one and the brake device release. The oil pressure of the oil circuit connected to the car device is greater than the oil pressure of the two-way valve, and then the oil in the oil circuit connected to the brake device flows back to the oil tank through the two-way valve, thereby achieving braking; since solenoid valve 1 and solenoid valve 2 are connected in series, the brake can only be released when the two solenoid valves are energized and reversed at the same time, and the brake can be tightened when any solenoid valve loses power, and in the process of hydraulic control of the winch, it can avoid a single failure of the brake caused by an erroneous operation of an oil circuit in the control oil circuit, which may cause the brake to be released incorrectly, thereby improving the reliability of the brake and the oil circuit structure is simple.

[0007] Furthermore, the braking device includes an oil storage tank, a spring, a piston and a brake block, one end of the spring is fixed to the bottom of the oil storage tank, the other end of the spring is fixedly connected to one end of a piston arranged in the oil storage tank, the other end of the piston is fixedly connected to the brake block, the brake block abuts against the rotating shaft of the winch, and the piston divides the interior of the oil storage tank into an upper oil storage chamber and a lower oil storage chamber, and the upper oil storage chamber is connected to the output end of the one-way valve.

[0008] The above arrangement allows the oil to flow directly into the upper oil storage chamber through the one-way valve when the winch brake needs to be released, thereby exerting a downward force on the piston to compress spring 1, thereby driving the piston to move downward, causing the brake block to disengage from the winch shaft and releasing the brake.

[0009] Furthermore, a spring 2 and a connecting block are provided inside the two-way valve, one end of the spring 2 is fixedly connected to the top of the two-way valve, and the other end of the spring 2 is fixedly connected to the connecting block, and the connecting block divides the interior of the two-way valve into a first chamber and a second chamber.

[0010] With the above arrangement, after the liquid oil flows into the two-way valve, it can push the connecting block to compress or stretch the second spring, thereby adjusting the oil pressure of the oil circuit connected to the brake device.

[0011] Furthermore, a valve port B is provided on one side of the first chamber, the valve port B is connected to the oil tank, the input 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.

[0012] According to the above arrangement, when braking is not needed, the oil pressure passing through both ends of the one-way valve can be equal by connecting the second chamber to the input end of the one-way valve and the output end of the one-way valve to the first chamber, so that the liquid oil passing through the one-way valve directly flows into the upper oil storage chamber, exerting a downward force on the piston to compress the spring 1, thereby driving the piston to move downward, so that the brake block is separated from the winch shaft and the brake is released; when braking is needed, after disconnecting one of the solenoid valves 1 and 2, the oil pressure in the second chamber connected to the input end of the one-way valve is reduced, so that the oil pressure in the first chamber is greater than the oil pressure in the second chamber, and then the connecting block is pushed to move upward to compress the spring 2, and the liquid oil in the first chamber flows out from the B valve port, thereby reducing the oil pressure in the first chamber, so that the hydraulic pressure in the upper oil storage chamber is greater than the oil pressure in the first chamber, so that the liquid oil in the upper oil storage chamber flows into the first chamber through the oil path under the action of the spring 1, and then flows back to the oil tank through the B valve port, and then the spring 1 pushes the piston to move upward, so that the brake block abuts against the winch shaft to achieve braking.

[0013] 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 1.

[0014] The above arrangement facilitates adjusting the external oil pressure to within the oil pressure range that the brake device can withstand through the pressure reducing valve.

[0015] Furthermore, the solenoid valve 1 and the solenoid valve 2 are both two-position three-way valves.

[0016] The above settings can conveniently realize the connection between the input and output ends by controlling the P port. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structural connection of the present invention.

[0018] Figure 2 for Figure 1 Enlarged view of point D in the middle.

[0019] Figure 3 for Figure 1 Enlarged view of point E in the middle.

[0020] Figure 4 for Figure 1 Enlarged view of point F in the middle. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1 to 4 As shown, a brake control system includes a winch 1, a brake device connected to the winch 1, an oil circuit connecting device, a two-way valve 6, an oil inlet 9 and an oil tank 10, wherein the brake device is connected to one end of the oil circuit connecting device and one end of the two-way valve 6 respectively through a one-way valve 11, the other end of the oil circuit connecting device is connected to the oil inlet 9 through a pressure reducing valve 8, and the other end of the two-way valve 6 is connected to the oil tank 10.

[0023] like Figure 1 As shown, the oil circuit connecting device includes a solenoid valve 1 71 and a solenoid valve 2 72, the solenoid valve 1 71 and the solenoid valve 2 72 are connected in series, one end of the pressure reducing valve 8 is connected to the oil inlet 9, the other end of the pressure reducing valve 8 is connected to the P1 valve port of the solenoid valve 1 71, and the A1 valve port of the solenoid valve 1 71 is connected to the P2 valve port of the solenoid valve 2 72 to achieve a series connection, so that the two solenoid valves need to be energized at the same time to allow the liquid oil passing through the pressure reducing valve 8 to pass through the two solenoid valves, otherwise the liquid oil passing through the pressure reducing valve 8 cannot be connected to the brake device through the solenoid valve 1 71 and the solenoid valve 2 72 to open the brake. In this embodiment, the solenoid valve 1 and the solenoid valve 2 are both two-position three-way valves.

[0024] like Figure 2-4As shown, when the one-way valve inputs the oil circuit to the brake device, the brake device is released. The brake device includes an oil storage tank 4, a spring 51, a piston 5 and a brake block 3. One end of the spring 51 is fixed to the bottom of the oil storage tank 4, and the other end of the spring 51 is fixedly connected to one end of the piston 5 arranged in the oil storage tank 4. The other end of the piston 5 is fixedly connected to the brake block 3. The brake block 3 abuts against the rotating shaft 2 of the winch 1. The piston 5 divides the interior of the oil storage tank 4 into an upper oil storage chamber 41 and a lower oil storage chamber 42. The upper oil storage chamber 41 is connected to the output end of the one-way valve. The two-way valve 6 is provided with a spring 52 and a connecting Block 7, one end of the spring 2 52 is fixedly connected to the top of the two-way valve 6, and the other end of the spring 2 52 is fixedly connected to the connecting block 7. The connecting block 7 divides the interior of the two-way valve 6 into a first chamber 61 and a second chamber 62. A valve port B is provided on one side of the first chamber 61, and the valve port B is connected to the oil tank 10. The output end of the one-way valve 11 is connected to the upper end of the first chamber 61, and the lower end of the second chamber 62 is respectively connected to the input end of the one-way valve and the A2 valve port of the solenoid valve 2, and the T1 valve port of the solenoid valve 1 71, the T2 valve port of the solenoid valve 2 72 and the B valve port of the two-way valve 6 are all connected to the oil tank 10; in this way, When braking is not needed, by connecting the second chamber 62 to the input end of the one-way valve 11 and connecting the output end of the one-way valve 11 to the first chamber 61, the oil pressure at both ends of the one-way valve 11 can be equal, so that the liquid oil passing through the one-way valve 11 directly flows into the upper oil storage chamber 41, exerting a downward force on the piston 5 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 braking is needed, after disconnecting one of the solenoid valve 1 71 and the solenoid valve 2 72, the second chamber connected to the input end of the one-way valve 11 The oil pressure of the first chamber 61 is reduced, so that the oil pressure of the first chamber 61 is greater than the oil pressure of the second chamber 62, and then the connecting block 7 is pushed upward to compress the spring 2 52, and 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, making the oil pressure in the upper oil storage chamber 41 greater than the oil pressure of the first chamber 61, so that the liquid oil in the upper oil storage chamber 41 flows into the first chamber 61 through the oil path under the action of the spring 1 51, and then flows back to the oil tank 10 through the B valve port, and then the spring 1 51 pushes the piston 5 to move upward, so that the brake block 3 abuts against the rotating shaft 2 of the winch 1 to achieve braking. In this embodiment, the oil inlet 9 is connected to an external oil pump (not shown in the figure).

[0025] Working principle of the present invention: when the brake needs to work, the liquid oil flows through the oil inlet 9 through the pressure reducing valve 8, 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 solenoid valve 1 71, so that the solenoid valve 1 71 and the solenoid valve 2 72 are energized at the same time, so that the solenoid valve 1 71 and the solenoid valve 2 72 are connected in series, and the liquid oil flows to the one-way valve 11 through the solenoid valve 1 71 and the solenoid valve 2 72 in turn, and at the same time flows to the two-way valve 6 through the oil branch path. The two ends of the two-way valve 6 are respectively connected to the two ends of the one-way valve 11, so that the oil pressure of the liquid oil flowing through the two ends of the one-way valve 11 is equal, so that 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 1 51 in the oil storage tank 4 is pressed downward, and the piston 5 drives the brake block 3 to move downward. The brake is released and the winch 1 works normally. When the brake needs to stop working, either the solenoid valve 1 71 or the solenoid valve 2 72 is powered off or both are powered off at the same time, so that the oil pressure in the second chamber 62 connected to the A2 valve port of the solenoid valve 2 72 can be reduced, so that the oil pressure in the first chamber 61 is greater than the oil pressure in the second chamber 62, pushing the connecting block 7 to move upward and compressing the spring 2 52, and the liquid oil in the first chamber 61 flows out from the B valve port, thereby reducing the oil pressure in the first chamber 61, and the oil pressure of the brake device is greater than the oil pressure in the first chamber 61, so that the liquid oil of the brake device flows into the first chamber 61 through the oil circuit, and then flows back to the oil tank 10 through the B valve port, finally reducing the oil pressure of the brake device, so that the brake block 3 abuts against the rotating shaft 2 of the winch 1, and braking is achieved.

Claims

1. A brake control system, comprising a winch, a brake device connected to the winch, an oil circuit connecting device, an oil inlet and an oil tank, Features: It also includes a two-way valve, wherein the brake device is connected to one end of the oil circuit connecting device and one end of the two-way valve through a one-way valve, the other end of the oil circuit connecting device is connected to the oil inlet through a pressure reducing valve, and the other end of the two-way valve is connected to the oil tank; The oil circuit connecting device includes a solenoid valve 1 and a solenoid valve 2, the solenoid valve 1 is connected in series with the solenoid valve 2, the P1 valve port of the solenoid valve 1 is connected to the oil inlet, the A1 valve port of the solenoid valve 1 is conductively connected to the P2 valve port of the solenoid valve 2, the A2 valve port of the solenoid valve 2 is respectively connected to the input end of the one-way valve and the upper end of the two-way valve, the output end of the one-way valve is respectively connected to the lower end of the two-way valve and the brake device, the T1 valve port of the solenoid valve 1, the T2 valve port of the solenoid valve 2 and the B valve port of the two-way valve are all connected to the oil tank, and the brake device is released when the one-way valve inputs the oil circuit to the brake device.

2. A brake control system according to claim 1, Features: The brake device includes an oil storage tank, a spring, a piston and a brake block. One end of the spring is fixed to the bottom of the oil storage tank, the other end of the spring is fixedly connected to one end of a piston arranged in the oil storage tank, the other end of the piston is fixedly connected to the brake block, the brake block abuts against the rotating shaft of the winch, and the piston divides the interior of the oil storage tank into an upper oil storage chamber and a lower oil storage chamber, and the upper oil storage chamber is connected to the other end of the one-way valve.

3. A brake control system according to claim 1, Features: A spring 2 and a connecting block are provided inside the two-way valve. One end of the spring 2 is fixedly connected to the top of the two-way valve, and the other end of the spring 2 is fixedly connected to the connecting block. The connecting block divides the inside of the two-way valve into a first chamber and a second chamber.

4. A brake control system according to claim 3, Features: A valve port B is provided on one side of the first chamber, the valve port B is connected to the oil tank, the input 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.

5. A brake control system according to claim 1, Features: 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 1.

6. A brake control system according to claim 1, Features: The solenoid valve 1 and the solenoid valve 2 are both two-position three-way valves.

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