CN111395427A - Scraper brake release structure and method - Google Patents
Scraper brake release structure and method Download PDFInfo
- Publication number
- CN111395427A CN111395427A CN202010184782.4A CN202010184782A CN111395427A CN 111395427 A CN111395427 A CN 111395427A CN 202010184782 A CN202010184782 A CN 202010184782A CN 111395427 A CN111395427 A CN 111395427A
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- Prior art keywords
- scraper
- brake
- oil
- valve
- pressure oil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/80—Component parts
- E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses a scraper brake release structure and a scraper brake release method, wherein the scraper brake release structure comprises a scraper to be released from a brake state, a brake loop system of the scraper is communicated with an external high-pressure oil source, and the external high-pressure oil source is communicated with an oil path from a foot brake valve to a wheel brake through an oil pipe at an oil outlet of a brake solenoid valve of the scraper. The invention is based on the braking principle of the scraper, is externally connected with a high-pressure oil source, and can quickly relieve the braking state of the fault scraper; and meanwhile, the functional advantages of the scraper are fully utilized, the fault scraper is dragged to a safety place or a scraper maintenance chamber by utilizing the strong load traction capacity of the scraper while supplying high-pressure oil to the fault scraper to help release the braking state, so that the influence on normal production is effectively avoided, and the obstacle removing efficiency of an underground mine is improved.
Description
Technical Field
The invention belongs to the technical field of scraper braking, and particularly relates to a scraper braking release structure and a scraper braking release method.
Background
The WJ-2A scraper is common equipment for underground mining, a brake system adopts the principle of 'spring brake and hydraulic release', an engine is not started, a brake pump does not work, four hubs are automatically locked, and effective dragging cannot be implemented by other equipment. In the process of supplying mine in an actual stope, once an engine fails, the engine cannot be restarted, due to the principle of a braking system, the failed engine cannot be effectively dragged by other equipment, and a scraper is inevitably stopped in a stope access or a mine removal roadway, so that normal mining work can be seriously influenced. The engine is replaced or maintained in the stope, so that firstly, the safety condition is poor, and the difficulty is brought to the hoisting of the engine; secondly, the maintenance space is small, and the light is poor; and thirdly, the device is damaged to block the channel, and the normal ore removal of other devices is influenced.
Disclosure of Invention
The present invention addresses the above-described problems of the prior art and provides a scraper brake release structure and method.
The invention solves the technical problems through the following technical means:
the scraper braking release structure comprises a scraper of which the braking state is to be released, wherein a braking loop system of the scraper is communicated with an external high-pressure oil source, and the external high-pressure oil source is communicated with an oil path from a foot braking valve to a wheel brake through an oil pipe at an oil outlet of a braking electromagnetic valve of the scraper.
Furthermore, the high-pressure oil source is a scraper capable of operating normally, and an oil outlet of a brake solenoid valve of the scraper is communicated with an oil pipe of the oil outlet of the brake solenoid valve of the scraper.
Furthermore, a tee joint is installed at an oil outlet of the braking electromagnetic valve of the scraper, and the other two interfaces of the tee joint are respectively connected with an original braking loop system of the scraper and an oil pipe at the oil outlet of the braking electromagnetic valve of the scraper.
In addition, the invention also provides a relieving method of the scraper brake, which comprises the following steps:
s1, disconnecting the brake loop system of the scraper from the oil outlet of the brake solenoid valve;
s2, connecting an oil pipe at an oil outlet of the original brake solenoid valve of the carry scraper to an external high-pressure oil source;
and S3, filling high-pressure oil into an oil way from a foot brake valve of the scraper to the wheel-side brake by using the high-pressure oil source, and releasing the braking state of the scraper.
Further, the high-pressure oil source in the step S2 is a scraper.
Furthermore, the scraper is provided with a three-way valve at the oil outlet of the braking electromagnetic valve to simultaneously charge high-pressure oil into oil passages from foot brake valves of the scraper and the scraper to a wheel-side brake.
Further, a connecting operation is performed between steps S3 and S2 to fixedly connect the scraper and the body of the scraper using the towing device.
The invention has the beneficial effects that: the invention is based on the braking principle of the scraper, is externally connected with a high-pressure oil source, and can quickly relieve the braking state of the fault scraper; and meanwhile, the functional advantages of the scraper are fully utilized, the fault scraper is dragged to a safety place or a scraper maintenance chamber by utilizing the strong load traction capacity of the scraper while supplying high-pressure oil to the fault scraper to help release the braking state, so that the influence on normal production is effectively avoided, and the obstacle removing efficiency of an underground mine is improved.
Drawings
Fig. 1 is a schematic view of a braking principle of the scraper in embodiment 1;
fig. 2 is a schematic view of external connection of the first scraper to the second scraper in embodiment 1;
fig. 3 is a schematic diagram illustrating the connection of the brake circuits of the first scraper and the second scraper in embodiment 1;
fig. 4 is a schematic diagram of the brake circuit connection of the first scraper in embodiment 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1 and 3, the scraper brake release structure includes a first scraper 10 with an engine failure and a normal second scraper 20, the brake circuit systems of the first scraper 10 and the second scraper 20 are communicated through an oil pipe, a three-way valve is installed at a brake solenoid valve oil outlet of the second scraper 20, and the other two interfaces of the three-way valve are respectively connected to an original brake circuit system of the second scraper 20 and a brake solenoid valve oil outlet of the first scraper 10.
Referring to fig. 1, which is a schematic diagram of a braking principle of a carry scraper, after a machine is started, an engine drives a brake pump to work through a hydraulic torque converter, and the brake pump flows to a liquid charging valve through an overflow safety valve, and the set pressure of an overflow valve cannot be lower than the upper limit pressure of the liquid charging valve. The liquid charging valve charges the two accumulators until the upper limit pressure of the liquid charging valve is reached, and the system pressure gauge can be used for monitoring the pressure condition of the accumulators in the system. After the liquid filling is finished, reversing oil pressure of the liquid filling valve returns to the oil tank through a secondary oil return port of the liquid filling valve, namely the liquid filling process is finished.
At the moment, the brake button can be released, the electromagnetic directional valve is electrified for reversing, high-pressure oil reaches the wheel-side brake through the foot brake valve to jack the brake disc, the brake is released, and the vehicle can run. In the running process, when braking is needed, a brake pedal is stepped on, the wheel side brake is communicated with the oil tank, and the brake moving plate and the brake static plate are released to generate braking force under the action of spring force, so that the vehicle is decelerated. When the vehicle needs to stop, the foot brake valve is firstly utilized to decelerate until the vehicle stops, then the brake button is pressed, the electromagnetic directional valve is reset after power failure, high-pressure oil returns to the oil tank through the foot brake valve, the brake is locked, and the vehicle is braked.
In the circuit, a pressure switch is connected in series in front of a brake button and is controlled by pressure oil of a control valve plate of the torque converter, the torque converter is driven to work when an engine is normal, one path of oil path used for gear control of the gearbox in the control valve enables the pressure switch to be connected, the brake button is also connected with a circuit of the electromagnetic directional valve, and the system can normally run and control. When the engine is out of order and can not be started, the pressure in the control valve of the torque converter is zero, the pressure switch disconnects the circuit, the electromagnetic directional valve is de-energized, the valve core is in a normal position, the wheel brake is communicated with the oil tank, the brake is locked, and the vehicle is completely braked, so that the safety protection device is formed.
Based on the above principle description, it is known that when the engine fails, the high-pressure oil is actually cut off from the oil path from the foot brake valve to the wheel brake because the electromagnetic directional valve core is in the normal position, and therefore, the oil pressure is insufficient to counteract the spring force. The present invention is therefore directed to restoring the oil circuit of the wheel-side brake from the high-pressure oil in the first scraper 10 with the engine failed through the foot brake valve: the normal brake loop system of the second scraper 20 can work normally, a tee joint is installed at an oil outlet of a brake solenoid valve (i.e. an electromagnetic directional valve described in the working principle) of the second scraper 20, the tee joint aims to communicate with the brake loop system of the second scraper 20 by using one interface so as to ensure the normal work of the second scraper 20, meanwhile, another interface of the tee joint is connected with an oil pipe, the oil pipe is connected to an oil outlet of the brake solenoid valve of the first scraper 10 and is communicated with the brake loop system of the first scraper 10, high-pressure oil in the second scraper 20 is led into an oil inlet end of a foot brake valve in the first scraper 10 through the oil pipe, so that the high-pressure oil in the first scraper 10 can reach an oil path of a wheel brake through the foot brake valve to recover, and the wheel brake of the first scraper 10 has enough oil pressure to lift the brake disc, the first scraper 10 is released from braking.
Example 2
As shown in fig. 4, based on the description of the conventional principle of embodiment 1, this embodiment further provides another scraper brake release structure, which includes the first scraper 10 with an engine failure, and an oil-filled pump (not shown) is connected to an oil outlet of the brake solenoid valve of the first scraper 10 by an oil pipe, and high-pressure oil is filled into an oil path from the foot brake valve to the wheel brake of the first scraper 10 by the oil-filled pump.
The principle of this embodiment is the same as that of embodiment 1, except that an external oil charge pump is used to charge high-pressure oil into an oil path from a foot brake valve to a wheel brake of the first scraper 10, so that the wheel brake of the first scraper 10 has a sufficient oil pressure to push the brake disc open, and the brake of the first scraper 10 is released.
Example 3
With reference to embodiments 1 and 2, a method of brake release for a scraper will be described, comprising the steps of:
s1, disconnecting the brake circuit system of the first scraper 10 from the oil outlet of the brake solenoid valve;
s2, connecting an oil pipe at an oil outlet of the primary brake solenoid valve of the first scraper 10 to an external high-pressure oil source;
s3, the high-pressure oil source charges high-pressure oil into the oil path from the foot brake valve to the wheel brake of the first scraper 10, and releases the braking state of the first scraper 10.
The high-pressure oil source in step S2 is the second scraper 20.
Further, the second scraper 20 is provided with a three-way valve at the oil outlet of the braking electromagnetic valve to simultaneously charge high-pressure oil into oil passages from the foot brake valve to the wheel brake of the second scraper 20 and the first scraper 10.
Further, a connecting operation is performed between steps S3 and S2 to fixedly connect the second scraper 20 and the body of the first scraper 10 using the towing device. The purpose of this operation is to prevent the first scraper 10 from sliding due to the instant loss of traction force when the brake is released, which causes a serious safety accident, and the method is advantageous in that the second scraper 20 serves both as a tractor to drag the failed first scraper 10 to a safe place or a scraper maintenance chamber to avoid affecting normal production, and as a source of high-pressure oil to help the failed first scraper 10 release the brake.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The scraper brake release structure is characterized by comprising a first scraper (10) to be released from a braking state, wherein a brake loop system of the first scraper (10) is communicated with an external high-pressure oil source, and the external high-pressure oil source is communicated with an oil path from a foot brake valve to a wheel brake through an oil pipe at an oil outlet of a brake solenoid valve of the first scraper (10).
2. The scraper brake release structure according to claim 1, wherein the high-pressure oil source is a second scraper (20) which can normally operate, and an oil outlet of the brake solenoid valve of the second scraper (20) is communicated with an oil pipe of an oil outlet of the brake solenoid valve of the first scraper (10).
3. The scraper brake release structure according to claim 2, wherein a tee joint is installed at the brake solenoid valve oil outlet of the second scraper (20), and the other two interfaces of the tee joint are respectively connected with the original brake circuit system of the second scraper (20) and the oil pipe at the brake solenoid valve oil outlet of the first scraper (10).
4. The scraper brake release method is characterized by comprising the following steps:
s1, disconnecting the brake circuit system of the first scraper (10) from the oil outlet of the brake solenoid valve;
s2, connecting an oil pipe at an oil outlet of a primary brake solenoid valve of the first scraper (10) to an external high-pressure oil source;
s3, the high-pressure oil source fills high-pressure oil into an oil path from a foot brake valve to a wheel-side brake of the first scraper (10), and the braking state of the first scraper (10) is released.
5. The scraper brake release method according to claim 4, wherein the high-pressure oil source in step S2 is a second scraper (20).
6. The scraper brake release method according to claim 5, characterized in that the second scraper (20) is provided with a three-way valve at a brake solenoid valve oil outlet to simultaneously charge high-pressure oil into oil passages of the second scraper (20) and the first scraper (10) from the foot brake valve to the wheel brake.
7. The scraper brake release method as claimed in claim 5 or 6, wherein a coupling operation is performed between steps S3 and S2 to fixedly couple the second scraper (20) and the body of the first scraper (10) using a traction device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010184782.4A CN111395427A (en) | 2020-03-17 | 2020-03-17 | Scraper brake release structure and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010184782.4A CN111395427A (en) | 2020-03-17 | 2020-03-17 | Scraper brake release structure and method |
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| Publication Number | Publication Date |
|---|---|
| CN111395427A true CN111395427A (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010184782.4A Pending CN111395427A (en) | 2020-03-17 | 2020-03-17 | Scraper brake release structure and method |
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| CN (1) | CN111395427A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0317320A (en) * | 1989-06-15 | 1991-01-25 | Komatsu Ltd | Controlling method of impact ripper |
| KR20030029144A (en) * | 2000-09-08 | 2003-04-11 | 히다치 겡키 가부시키 가이샤 | Parking brake device of working vehicle |
| CN107264499A (en) * | 2017-06-30 | 2017-10-20 | 徐州徐工矿山机械有限公司 | A kind of quarry tipper hydraulic auxiliary brake system and its control method |
| CN206871054U (en) * | 2017-06-30 | 2018-01-12 | 徐州徐工矿山机械有限公司 | Quarry tipper hydraulic auxiliary brake system |
| CN108162989A (en) * | 2017-12-27 | 2018-06-15 | 北京交通大学 | A kind of urban rail transit vehicles traction auxiliary integrated vehicle energy-storage system |
-
2020
- 2020-03-17 CN CN202010184782.4A patent/CN111395427A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0317320A (en) * | 1989-06-15 | 1991-01-25 | Komatsu Ltd | Controlling method of impact ripper |
| KR20030029144A (en) * | 2000-09-08 | 2003-04-11 | 히다치 겡키 가부시키 가이샤 | Parking brake device of working vehicle |
| CN107264499A (en) * | 2017-06-30 | 2017-10-20 | 徐州徐工矿山机械有限公司 | A kind of quarry tipper hydraulic auxiliary brake system and its control method |
| CN206871054U (en) * | 2017-06-30 | 2018-01-12 | 徐州徐工矿山机械有限公司 | Quarry tipper hydraulic auxiliary brake system |
| CN108162989A (en) * | 2017-12-27 | 2018-06-15 | 北京交通大学 | A kind of urban rail transit vehicles traction auxiliary integrated vehicle energy-storage system |
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Application publication date: 20200710 |
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| RJ01 | Rejection of invention patent application after publication |