Hydraulic redundant structure applied to constant deceleration braking system of mine hoist

Abstract

The utility model belongs to the technical field of mine hoists, and particularly relates to a hydraulic redundant structure applied to a constant deceleration braking system of a mine hoist. According to the utility model, the two groups of mutually redundant brakes are adopted, and meanwhile, each group of brakes adopts two mutually redundant brakes, that is, when any one of the four brakes breaks down, other brakes can still work normally. The two first-stage brake valves are redundant to each other, and when oil return at one end breaks down, the two brakes on the rotary disc on the other side can still conduct braking. The constant deceleration brake valves adopt two groups which are mutually redundant, and each group comprises two groups which are mutually redundant. And when any oil way goes wrong, other oil ways can still work normally, so that the brake meets the braking requirement. And the emergency brake valve group also adopts two brake valves which are mutually redundant. The oil pump motor set comprises an open oil pump motor set and a standby oil pump motor set which are redundant to each other. Redundancy design based on the method can increase reliability and safety of the system, and safety operation of equipment is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mine hoists, and in particular relates to a hydraulic redundancy structure applied to a constant deceleration braking system of a mine hoist. Background Art

[0002] The hydraulic system of the hoist brake is the most important part of the hoist, which is directly related to the safety of personnel and equipment, so the requirements for its safety performance are the most stringent. The reliability and stability of its operation largely depend on the performance of the braking system. Therefore, how to design a sufficiently stable and reliable braking system is the top priority. The stability of the existing hydraulic system cannot achieve sufficiently good safety and stability when encountering emergencies such as damage to the brake components. Therefore, it is urgent to design a hydraulic redundant structure for the constant deceleration braking system of the mine hoist, which can meet the requirements that when any oil circuit has problems, other oil circuits can still work normally. Utility Model Content

[0003] The purpose of the utility model is to provide a hydraulic redundancy structure applied to a constant deceleration braking system of a mine hoist, which can meet the stability and safety required by the design.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions.

[0005] A hydraulic redundancy structure applied to a constant deceleration braking system of a mine hoist comprises a hydraulic oil tank; the hydraulic oil tank is connected to the first ends of a first oil pump motor and a second oil pump motor through a pipeline; the second ends of the first oil pump motor and the second oil pump motor are connected to the first ends of two groups of constant deceleration brake valve groups through a pipeline provided with a one-way valve; the second ends of the first oil pump motor and the second oil pump motor are connected to the first ends of two groups of primary brake valve groups through a pipeline provided with a one-way valve; the second ends of the first oil pump motor and the second oil pump motor are connected to the first ends of two groups of primary brake valve groups after being connected to the first ends of the emergency brake valve group and the first ends of the proportional valve group; the emergency brake The second ends of the moving valve group and the proportional valve group are merged through pipelines and then merged into the first oil pump motor and the second oil pump motor. The second ends are merged through a pipeline with a one-way valve and then merged through a one-way valve to connect the pipeline with the first ends of two sets of constant deceleration brake valve groups; the second ends of the two sets of constant deceleration brake valve groups are respectively merged with a pipeline with a one-way valve in parallel and then merged with the second ends of the two sets of primary brake valve groups, and then are respectively connected to the two sets of brakes; the first ends of the two sets of primary brake valve groups are merged with the first ends of the emergency brake valve group and the proportional valve group and are also connected to the third end of the hydraulic oil tank.

[0006] Furthermore, a first filter is provided between the other ends of the first oil pump motor and the second oil pump motor after they are joined through a pipeline provided with a one-way valve and the next one-way valve, and the first filter is connected to an oil suction valve block assembly.

[0007] Furthermore, a second filter is provided on the hydraulic oil tank.

[0008] Furthermore, an accumulator is connected to the pipeline between each set of primary brake valve groups and the brake.

[0009] Furthermore, a pressure transmitter is provided on the accumulator.

[0010] Furthermore, two brakes are provided in each group.

[0011] Furthermore, two brake valves are arranged in the emergency brake valve group.

[0012] Furthermore, each constant deceleration brake valve group is provided with two brake valves.

[0013] Furthermore, the hydraulic oil tank is also provided with an instrument and a pipe joint combination.

[0014] The beneficial effects of the utility model.

[0015] Two sets of redundant brakes are used, and each set of brakes uses two redundant brakes. That is, when any one of the four brakes fails, the other brakes can still work normally.

[0016] The first-stage brake valve also uses two redundant ones. When the oil return at one end fails, the two brakes on the turntable on the other side can still brake.

[0017] The constant deceleration brake valve also uses two groups of mutually redundant valves, each group has two mutually redundant valves. That is, when any oil circuit has a problem, the other oil circuits can still work normally, so that the brake meets the braking requirements.

[0018] The emergency brake valve group also uses two redundant brake valves.

[0019] The oil pump motor group consists of two groups, one for operation and one for backup, which are redundant to each other.

[0020] The redundant design based on this can increase the reliability and safety of the system and greatly improve the safe operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the general layout diagram of the utility model.

[0022] Figure 2 It is a front view schematic diagram of the hydraulic oil pump of the utility model.

[0023] Figure 3 It is a left side schematic diagram of the hydraulic oil pump of the utility model.

[0024] Figure 4 It is the front view of the box cover valve group component of the utility model.

[0025] Figure 5 It is a left view of the box cover valve group component of the utility model.

[0026] Figure 6 This is a K-direction view of the box cover valve assembly of the utility model.

[0027] Figure 7 It is a view of the box cover valve group assembly in the M direction of the utility model.

[0028] Figure 8 It is a principle diagram of the utility model.

[0029] Explanation of the serial numbers in the figure: 1-hydraulic oil tank, 21-first oil pump motor, 22-second oil pump motor, 3-pipeline, 4-second filter, 5-oil suction valve block assembly, 6-first filter, 7-constant deceleration brake valve group, 8-brake, 9-first brake valve group, 10-emergency brake valve group, 11-proportional valve group, 12-accumulator, 13-instrumentation and pipeline joint combination, 14-pressure transmitter. DETAILED DESCRIPTION

[0030] like Figure 1-8 The utility model comprises a hydraulic oil tank 1; the hydraulic oil tank 1 is connected to the first ends of the first oil pump motor 21 and the second oil pump motor 22 through a pipeline 3; the second ends of the first oil pump motor 21 and the second oil pump motor 22 are connected to the first ends of two groups of constant deceleration brake valve groups 7 through a one-way valve after the first ends of the first oil pump motor 21 and the second oil pump motor 22 are connected through the pipeline 3 provided with a one-way valve; the second ends of the first oil pump motor 21 and the second oil pump motor 22 are connected to the first ends of the two groups of primary brake valve groups 9 after the first ends of the first oil pump motor 21 and the second oil pump motor 22 are connected to the first ends of the emergency brake valve group 10 and the first ends of the proportional valve group 11; the emergency brake valve group 10 and the proportional valve The second end of the valve group 11 merges with the pipeline 3 and then merges into the second end of the first oil pump motor 21 and the second oil pump motor 22, and then merges with the pipeline 3 provided with a one-way valve, and then passes through a one-way valve to connect to the pipeline 3 of the first end of two groups of constant deceleration brake valve groups 7; the second ends of the two groups of constant deceleration brake valve groups 7 are respectively merged with a pipeline 3 provided with a one-way valve in parallel, and then merged with the second ends of the two groups of primary brake valve groups 9, and then are respectively connected to two groups of brakes 8; the first ends of the two groups of primary brake valve groups 9 are merged with the first ends of the emergency brake valve group 10 and the proportional valve group 11, and are also connected to the third end of the hydraulic oil tank 1.

[0031] Furthermore, the other ends of the first oil pump motor 21 and the second oil pump motor 22 are joined through a pipeline 3 provided with a one-way valve, and a first filter 6 is provided between the next one-way valve, and the first filter 6 is connected to an oil suction valve block assembly 5 .

[0032] Furthermore, a second filter 4 is also provided on the hydraulic oil tank 1 .

[0033] Furthermore, an accumulator 12 is connected to the pipeline 3 between each set of primary brake valve groups 9 and the brake 8 .

[0034] Furthermore, the accumulator 12 is provided with a pressure transmitter.

[0035] Furthermore, two brakes 8 are provided in each group.

[0036] Furthermore, two brake valves are arranged in the emergency brake valve group 10 .

[0037] Furthermore, each constant deceleration brake valve group 7 is provided with two brake valves.

[0038] Furthermore, the hydraulic oil tank 1 is also provided with an instrument and pipe joint assembly 13 .

[0039] The working mode of the utility model.

[0040] The two left groups of the constant deceleration brake valve group 7 of the oil circuit block and the pipes connected to the one-way valves are connected to the two brakes 8 on the turntable A side; the two right groups of the constant deceleration brake valve group 7 of the oil circuit block and the pipes connected to the one-way valves are connected to the brake 8 on the turntable B side.

[0041] The opening of the emergency brake valve assembly 10 is the oil inlet when the brake is released, and is also the oil return opening when the brake is clamped.

[0042] The constant deceleration solenoid valve changes the direction of the oil circuit by changing the passages of ports P, T, and A. Four constant deceleration solenoid valves are installed on the oil circuit block, corresponding to the constant deceleration brake valve group 7 in the schematic diagram. The solenoid valve is a cut-off two-position three-way solenoid valve, which is normally open when the power is off. When the power is off, A is connected to P, and when the power is on, A is connected to T.

[0043] When the system is released, the oil pump supplies oil and the solenoid valve is powered off. At this time, the port of the emergency brake valve group 10 is used as the oil inlet, and the oil pump enters the oil circuit block through the port of the emergency brake valve group 10. In the oil circuit block, six oil lines enter the brake through two groups on the left and right sides of the constant deceleration brake valve group 7 and two groups of one-way valve pipelines. Two of the one-way valve pipelines are connected to the brake pipeline through a one-way valve and a throttle valve, and the rest of the oil enters the solenoid valve through port A of the oil circuit block. At this time, port A of the solenoid valve is connected to port P, and the oil enters the constant deceleration brake valve group 7 through port P, and then goes directly to the brake pipeline through the throttle valve.

[0044] When the system is closed, the oil pump stops supplying oil, the solenoid valve is energized, and the brake leaks oil. Since there is a one-way valve in the pipeline where the one-way valve pipeline is located, the brake oil can only leak through the pipelines corresponding to the four oil ports of the constant deceleration brake valve group 7. At this time, the oil enters the P port and T port of the oil circuit block through the constant deceleration brake valve group 7. Since the solenoid valve is energized and reversed at this time, the A port of the solenoid valve is connected to the T port, and the oil can only enter the A port through the T port and then enter the port where the emergency brake valve group 10 is located. At this time, the port where the emergency brake valve group 10 is located is used as the return oil port. There is a one-way valve in the pipeline between the port where the emergency brake valve group 10 is located and the oil pump. The port where the emergency brake valve group 10 is located can only enter the third end of the hydraulic oil tank 1 in the constant deceleration return oil valve group through a four-way joint.

[0045] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the implementation mode of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.

Claims

1. A hydraulic redundant structure for a constant deceleration braking system of a mine hoist, comprising a hydraulic oil tank (1); the hydraulic oil tank (1) is connected to the first ends of a first oil pump motor (21) and a second oil pump motor (22) through a pipeline (3); the second ends of the first oil pump motor (21) and the second oil pump motor (22) are connected to the first ends of two groups of constant deceleration brake valve groups (7) through a pipeline (3) provided with a one-way valve; the second ends of the first oil pump motor (21) and the second oil pump motor (22) are connected to the first ends of two groups of primary brake valve groups (9) through the pipeline (3) provided with a one-way valve, and are also connected to the first ends of the emergency brake valve group (10) and the first ends of the proportional valve group (11); the emergency brake The second ends of the moving valve group (10) and the proportional valve group (11) are merged through the pipeline (3) and then merged into the second ends of the first oil pump motor (21) and the second oil pump motor (22) through the pipeline (3) provided with a one-way valve, and then merged through a one-way valve to connect to the pipeline (3) with the first ends of the two constant deceleration brake valve groups (7); the second ends of the two constant deceleration brake valve groups (7) are respectively connected in parallel with a pipeline (3) provided with a one-way valve, and then merged with the second ends of the two primary brake valve groups (9), and then respectively connected to the two brake groups (8); the first ends of the two primary brake valve groups (9) are merged with the first ends of the emergency brake valve group (10) and the proportional valve group (11), and are also connected to the third end of the hydraulic oil tank (1).

2. The hydraulic redundancy structure applied to the constant deceleration braking system of a mine hoist according to claim 1 is characterized in that: The other ends of the first oil pump motor (21) and the second oil pump motor (22) are joined through a pipeline (3) provided with a one-way valve, and a first filter (6) is provided between the next one-way valve, and the first filter (6) is connected to an oil suction valve block assembly (5).

3. The hydraulic redundancy structure applied to the constant deceleration braking system of a mine hoist according to claim 1 is characterized in that: The hydraulic oil tank (1) is also provided with a second filter (4).

4. The hydraulic redundancy structure applied to the constant deceleration braking system of a mine hoist according to claim 1 is characterized in that: An accumulator (12) is also connected to the pipeline (3) between each set of primary brake valve groups (9) and the brake (8).

5. The hydraulic redundancy structure applied to the constant deceleration braking system of a mine hoist according to claim 4, characterized in that: The accumulator (12) is provided with a pressure transmitter (14).

6. The hydraulic redundancy structure applied to the constant deceleration braking system of a mine hoist according to claim 1, characterized in that: Each group of brakes (8) is provided with two.

7. The hydraulic redundancy structure applied to the constant deceleration braking system of a mine hoist according to claim 1 is characterized in that: Two brake valves are arranged in the emergency brake valve group (10).

8. The hydraulic redundancy structure applied to the constant deceleration braking system of a mine hoist according to claim 1, characterized in that: Each constant deceleration brake valve group (7) is provided with two brake valves.

9. The hydraulic redundancy structure applied to the constant deceleration braking system of a mine hoist according to claim 1, characterized in that: The hydraulic oil tank (1) is also provided with an instrument and a pipe joint assembly (13).

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