CN212615669U - Comprehensive protection device for mining belt conveyor - Google Patents
Comprehensive protection device for mining belt conveyor Download PDFInfo
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- CN212615669U CN212615669U CN202021320111.8U CN202021320111U CN212615669U CN 212615669 U CN212615669 U CN 212615669U CN 202021320111 U CN202021320111 U CN 202021320111U CN 212615669 U CN212615669 U CN 212615669U
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Abstract
The utility model discloses a mining belt feeder integrated protection device: the hydraulic circuit is sequentially communicated with an oil tank, an axial plunger pump, a one-way valve I, a three-position four-way explosion-proof electromagnetic reversing valve, a superposed hydraulic control one-way valve block and a hydraulic cylinder in a two-way mode through a hydraulic pipe, and a first quick action circuit based on an energy accumulator is arranged between the axial plunger pump and the hydraulic cylinder in the hydraulic circuit in parallel; and a second quick movement loop based on differential connection is arranged at a liquid inlet and a liquid outlet of the hydraulic cylinder. The utility model discloses a hydraulic circuit is furnished with a quick action return circuit and two sets of return circuits in quick motion return circuit No. two, after receiving disconnected area signal, can act on the pneumatic cylinder together with axial plunger pump, has increased the flow of pneumatic cylinder in fact, reaches the effect that improves pneumatic cylinder reaction rate, and then improves disconnected area protection device's reaction rate, improves protection device's reliability.
Description
Technical Field
The utility model relates to a mining equipment technical field, concretely relates to mining belt feeder integrated protection device.
Background
In large modern coal mines, almost all coal mine transportation links are completed by belt conveyors. With the continuous progress and development of society, the requirement of modern mines on the automation degree of coal mine production and production equipment is higher and higher, and the requirement on a protection control system of a belt conveyor is also higher and higher. The belt breakage protection device is an important protection in the comprehensive protection device of the mining belt conveyor, the belt breakage protector monitors the running condition of the belt by means of the signal acquisition device, when the belt breakage fault occurs to the belt, the acquisition device accurately acquires a belt gliding signal, the controller rapidly acts, and large economic loss caused by belt breakage and even personal safety are prevented from being endangered.
The hydraulic belt breakage protection device is a belt conveyor protection device which is widely applied, but due to the limitation of the flow of a hydraulic control system, at least 5 seconds are needed from the beginning of the action of a press roller to the pressing of the press roller on a winding drum, the winding drum rotating at a high speed in the process is thrown off a belt and runs for a period of time, the damage to equipment or adjacent operators is likely to be caused, and the flow of the whole control system cannot be greatly increased by the hydraulic control system. Patent document CN202691560U discloses a hydraulic drive belt breakage protection device, which improves the response speed of a hydraulic cylinder by arranging an accumulator, and shortens the start and in-place time, thereby realizing quick belt breakage protection. The hydraulic circuit has two defects, namely the performance of the energy accumulator is limited, the reaction speed of the hydraulic cylinder is improved to a limited degree, and the reaction speed of the hydraulic cylinder is reduced to a certain extent by adopting the cartridge valve as a control element.
SUMMERY OF THE UTILITY MODEL
In order to further improve the response speed of hydraulic drive disconnected area protection device, improve protection device's reliability, the utility model provides a mining belt feeder integrated protection device.
The utility model adopts the technical scheme as follows: a comprehensive protection device for a mining belt conveyor comprises a hydraulic cylinder serving as an execution element of a hydraulic belt breakage protection device, wherein the hydraulic cylinder is provided with a hydraulic circuit, the hydraulic circuit is sequentially communicated with an oil tank, an axial plunger pump, a one-way valve I, a three-position four-way explosion-proof electromagnetic reversing valve, a superposed hydraulic control one-way valve block and the hydraulic cylinder in a two-way mode through a hydraulic pipe, and a first quick action loop based on an energy accumulator is arranged in the hydraulic circuit in parallel between the axial plunger pump and the hydraulic cylinder; and a second quick movement loop based on differential connection is arranged at a liquid inlet and a liquid outlet of the hydraulic cylinder.
The utility model has the advantages that: the utility model discloses a hydraulic circuit is furnished with a quick action return circuit and two sets of return circuits in quick motion return circuit No. two, after receiving disconnected area signal, can act on the pneumatic cylinder together with axial plunger pump, has increased the flow of pneumatic cylinder in fact, reaches the effect that improves pneumatic cylinder reaction rate, and then improves disconnected area protection device's reaction rate, improves protection device's reliability.
Preferably: the first quick action loop is composed of a safety and stop valve block, an energy accumulator, a two-position four-way explosion-proof electromagnetic reversing valve and a hydraulic pipe, the safety and stop valve block is used for opening, closing, safety and unloading of the energy accumulator, and the two-position four-way explosion-proof electromagnetic reversing valve is used for controlling the energy accumulator to store and release energy.
Preferably: and a pressure relay is arranged between the energy accumulator and the two-position four-way explosion-proof electromagnetic directional valve.
Preferably: and a one-way valve II is arranged between the axial plunger pump and the first quick action loop.
Preferably: the second quick movement loop comprises a two-position three-way explosion-proof electromagnetic directional valve, a liquid inlet of the two-position three-way explosion-proof electromagnetic directional valve is communicated with a rod cavity of the hydraulic cylinder, one liquid outlet is communicated with a rodless cavity of the hydraulic cylinder, and the other liquid outlet is communicated with the superposed liquid control one-way valve block.
Preferably: an oil suction filter is arranged in front of the axial plunger pump, and a pressure oil filter and a one-way valve I are sequentially arranged behind the axial plunger pump.
Preferably: the overlapped hydraulic control one-way valve block consists of two hydraulic control one-way valves which are provided with control oil paths mutually.
Preferably: the hydraulic circuit supplies liquid to a plurality of hydraulic cylinders, and a plurality of energy accumulators are arranged on a single first quick action circuit.
Drawings
Fig. 1 is a hydraulic schematic diagram of a first embodiment of the present invention.
Fig. 2 is a hydraulic schematic diagram of a second embodiment of the present invention.
The device comprises an oil tank 1, a liquid level liquid thermometer 2, an air filter 3, a liquid supplementing ball valve 4, an oil suction oil filter 5, an axial plunger pump 6, an explosion-proof motor 7, a pressure oil filter 8, a one-way valve I9, an explosion-proof electromagnetic overflow valve 10, a pressure gauge switch 11, an earthquake-proof pressure gauge I12, a one-way valve II 13, a test joint 14, a test hose 15, an earthquake-proof pressure gauge II 16, a pressure relay 17, a two-position four-way explosion-proof electromagnetic reversing valve 18, a three-position four-way explosion-proof electromagnetic reversing valve 19, a stacked hydraulic control one-way valve block 20, a safety and stop valve block 21, an energy accumulator 22, a high-pressure oil pipe 23, a.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
In the first embodiment, as shown in fig. 1: a comprehensive protection device for a mining belt conveyor comprises a hydraulic cylinder 25 serving as an execution element of a hydraulic belt breakage protection device, wherein the hydraulic cylinder 25 is provided with a hydraulic loop, the hydraulic loop is sequentially and bidirectionally communicated with an oil tank 1, an axial plunger pump 6, a one-way valve I9, a three-position four-way explosion-proof electromagnetic directional valve 19, a superposed hydraulic control one-way valve block 20 and the hydraulic cylinder 25 through hydraulic pipes, and a first quick action loop based on an energy accumulator 22 is arranged in the hydraulic loop in parallel between the axial plunger pump 6 and the hydraulic cylinder 25; and a second quick movement loop based on differential connection is arranged at a liquid inlet and a liquid outlet of the hydraulic cylinder 25. The hydraulic circuit of the first embodiment is provided with two sets of circuits, namely the first quick action circuit and the second quick motion circuit, and after receiving the belt breakage signal, the hydraulic circuit and the axial plunger pump 6 can act on the hydraulic cylinder 25 together, so that the flow of the hydraulic cylinder 25 is actually increased, the reaction speed of the hydraulic cylinder 25 is increased, the reaction speed of the belt breakage protection device is further increased, and the reliability of the protection device is improved.
In the first embodiment, as shown in fig. 1: the first quick action loop is composed of a safety and stop valve block 21, an energy accumulator 22, a two-position four-way explosion-proof electromagnetic directional valve 18 and a hydraulic pipe, the safety and stop valve block 21 is used for opening, closing, safety and unloading of the energy accumulator 22, and the two-position four-way explosion-proof electromagnetic directional valve 18 is used for controlling the energy accumulator 22 to store and release energy. The safety and stop valve block 21 of the first embodiment is composed of a high-pressure ball core stop valve, a direct-acting overflow valve and a small stop valve, and plays the roles of opening and closing, safety and unloading the energy accumulator 22 respectively. The accumulator 22 can be a diaphragm type accumulator, is spherical, has small mass-volume ratio and small capacity, is suitable for absorbing hydraulic impact and is suitable for mining occasions. In a normal state, the electromagnet 2YA is powered off, the two-position four-way explosion-proof electromagnetic directional valve 18 is positioned at the right position, and the energy accumulator 22 is in an energy charging or energy charging completion state; after receiving the belt breaking signal, the electromagnet 2YA is switched on, the two-position four-way explosion-proof electromagnetic directional valve 18 is in the left position, and the energy accumulator 22 is in a release state.
In the first embodiment, as shown in fig. 1: and a pressure relay 17 is arranged between the energy accumulator 22 and the two-position four-way explosion-proof electromagnetic directional valve 18. The pressure relay 17 of the first embodiment is used for observing and detecting the pressure value of the energy accumulator 22, sending a signal when the pressure is lower than the pressure required by the protection action, and controlling the action of the two-position four-way explosion-proof electromagnetic directional valve 18.
In the first embodiment, as shown in fig. 1: and a second check valve 13 is arranged between the axial plunger pump 6 and the first quick action loop. The second check valve 13 of the first embodiment prevents the backflow of the hydraulic fluid in the accumulator 22.
In the first embodiment, as shown in fig. 1: the second quick movement loop comprises a two-position three-way explosion-proof electromagnetic directional valve 24, a liquid inlet of the two-position three-way explosion-proof electromagnetic directional valve 24 is communicated with a rod cavity of the hydraulic cylinder 25, one liquid outlet is communicated with a rodless cavity of the hydraulic cylinder 25, and the other liquid outlet is communicated with the superposed hydraulic control one-way valve block 20. In a normal state, the electromagnet 5YA is powered off, the two-position three-way explosion-proof electromagnetic directional valve 24 is in a left position, and the hydraulic cylinder 25 is in a contraction pressure maintaining state; after receiving the belt breaking signal, the electromagnet 5YA is switched on, the two-position three-way explosion-proof electromagnetic directional valve 24 is positioned at the right position, the hydraulic cylinder 25 realizes differential connection, and the hydraulic cylinder moves forwards rapidly; after a period of time delay, the electromagnet 5YA is powered off, the two-position three-way explosion-proof electromagnetic directional valve 24 is in the left position, and the hydraulic cylinder 25 is in an extending pressure maintaining state.
In the first embodiment, as shown in fig. 1: an oil suction filter 5 is arranged in front of the axial plunger pump 6, and a pressure oil filter 8 and a one-way valve I9 are sequentially arranged behind the axial plunger pump. The axial plunger pump 6 of the embodiment is provided with the explosion-proof motor 7, and forms a complete liquid outlet assembly together with the oil suction oil filter 5, the pressure oil filter 8 and the one-way valve I9.
In the first embodiment, as shown in fig. 1: the overlapped hydraulic control check valve block 20 is composed of two hydraulic control check valves having control oil passages with each other. The first embodiment of the present invention provides a stacked hydraulic control check valve block 20, which is a combined check valve, and can accurately implement one-way control of a pipeline.
In example two, as shown in fig. 2: the hydraulic circuit supplies liquid to a plurality of hydraulic cylinders 25, and a plurality of accumulators 22 are arranged in a single one-speed action circuit. In this embodiment, in order to ensure the stability and reliability of the hydraulic belt breakage protection device, it may be necessary to provide a plurality of hydraulic cylinders 25 as actuators, so that the second embodiment provides a plurality of hydraulic cylinders 25 and a plurality of accumulator 22 to meet the requirement.
In addition, the medium in the above embodiment uses water glycol, all sealing elements in the hydraulic circuit use fluororubber, the solenoid valve and other electric elements use DC24V, and the rated wage pressure in the system is not more than 20 MPa. The acquisition of the belt breakage signal of the belt breakage protection device can be referred to patent document CN101955059A, and the execution device, i.e., the catching device, can be referred to patent document CN202897452U, which are well known and will not be described in detail here.
It is obvious that the above embodiments of the present invention are only examples for illustrating the present invention, and are not intended to limit the embodiments of the present invention. Obvious changes or variations coming within the spirit of the invention are intended to be covered by the scope of the invention.
Claims (8)
1. The utility model provides a mining belt feeder integrated protection device, is including pneumatic cylinder (25) as the disconnected protection device execute component of hydraulic pressure, pneumatic cylinder (25) are furnished with hydraulic circuit, hydraulic circuit passes through hydraulic pressure pipe two-way intercommunication oil tank (1), axial plunger pump (6), check valve (9), tribit four-way flame proof solenoid directional valve (19), stack formula liquid accuse check valve piece (20) and pneumatic cylinder (25) in proper order, its characterized in that: the hydraulic circuit is provided with a first quick action circuit based on an accumulator (22) in parallel between the axial plunger pump (6) and the hydraulic cylinder (25); and a second quick movement loop based on differential connection is arranged at a liquid inlet and a liquid outlet of the hydraulic cylinder (25).
2. The comprehensive protection device for the mining belt conveyor according to claim 1, characterized in that: the quick action loop is composed of a safety and stop valve block (21), an energy accumulator (22), a two-position four-way explosion-proof electromagnetic directional valve (18) and a hydraulic pipe, wherein the safety and stop valve block (21) is used for opening, closing, safety and unloading of the energy accumulator (22), and the two-position four-way explosion-proof electromagnetic directional valve (18) is used for controlling the energy accumulator (22) to store and release energy.
3. The comprehensive protection device for the mining belt conveyor according to claim 2, characterized in that: and a pressure relay (17) is arranged between the energy accumulator (22) and the two-position four-way explosion-proof electromagnetic directional valve (18).
4. The comprehensive protection device for the mining belt conveyor according to claim 2, characterized in that: and a second check valve (13) is arranged between the axial plunger pump (6) and the first quick action loop.
5. The comprehensive protection device for the mining belt conveyor according to claim 1, characterized in that: the second quick movement loop comprises a two-position three-way explosion-proof electromagnetic directional valve (24), a liquid inlet of the two-position three-way explosion-proof electromagnetic directional valve (24) is communicated with a rod cavity of the hydraulic cylinder (25), one liquid outlet is communicated with a rodless cavity of the hydraulic cylinder (25), and the other liquid outlet is communicated to the superposed type hydraulic control one-way valve block (20).
6. The comprehensive protection device for the mining belt conveyor according to claim 1, characterized in that: an oil suction filter (5) is arranged in front of the axial plunger pump (6), and a pressure oil filter (8) and a one-way valve I (9) are sequentially arranged behind the axial plunger pump.
7. The comprehensive protection device for the mining belt conveyor according to claim 1, characterized in that: the overlapped hydraulic control one-way valve block (20) is composed of two hydraulic control one-way valves with control oil paths mutually.
8. The comprehensive protection device for the mining belt conveyor according to claim 1, characterized in that: the hydraulic circuit supplies liquid to a plurality of hydraulic cylinders (25), and a plurality of accumulators (22) are arranged on a single first quick action circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021320111.8U CN212615669U (en) | 2020-07-08 | 2020-07-08 | Comprehensive protection device for mining belt conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021320111.8U CN212615669U (en) | 2020-07-08 | 2020-07-08 | Comprehensive protection device for mining belt conveyor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212615669U true CN212615669U (en) | 2021-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021320111.8U Active CN212615669U (en) | 2020-07-08 | 2020-07-08 | Comprehensive protection device for mining belt conveyor |
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| Country | Link |
|---|---|
| CN (1) | CN212615669U (en) |
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2020
- 2020-07-08 CN CN202021320111.8U patent/CN212615669U/en active Active
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