Cable take-up and pay-off hydraulic control device of electric carry-scraper

Abstract

The utility model discloses a hydraulic control device for cable winding and unwinding of an electric carry-scraper, which comprises a hydraulic pump, a hydraulic motor, a remote pressure regulating valve, a low-pressure overflow valve, a hydraulic reversing valve, an integrated valve block, a hydraulic pressure gauge and the like, the hydraulic pump and the integrated valve block are mounted on a rear rack of the carry-scraper, and the hydraulic motor is mounted on a cable drum and drives the drum to rotate. The remote pressure regulating valve, the low-pressure overflow valve and the hydraulic reversing valve are integrated on the integrated valve block by adopting a plate-type structure, and a hydraulic system is in a high-pressure state during cable collection and is in a low-pressure state during cable laying, so that the phenomenon that the cable is broken due to the fact that the cable is always in a high-pressure cable pulling state is avoided, the cable is effectively protected, and the service life of the cable is prolonged. In addition, during cable winding and unwinding, a control oil port of the hydraulic control reversing valve is communicated with control oil of a reverse gear clutch of the gearbox, high-low pressure switching of a hydraulic system and cable winding and unwinding are conducted synchronously, and the phenomenon that cable winding is not in time, and consequently a carry-scraper presses the cable is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cable retracting and releasing hydraulic control, in particular to a cable retracting and releasing hydraulic control device for an electric scraper. Background Art

[0002] In order to ensure that the cable is not broken or crushed in the hydraulic control system of the cable retracting and releasing of the mining electric scraper, it is necessary to design a reasonable cable retracting and releasing device and a matching hydraulic control system to protect the towing cable from damage and save production costs.

[0003] The traditional cable retracting and releasing control method adopts motor deceleration drive and hydraulic deceleration drive. Motor deceleration drive is basically no longer used. Even for hydraulic drive, a single pressure valve control method was used before. The retracting and releasing cables are all driven by the same pressure, and the hydraulic components are all connected by pipes. This hydraulic system has high pressure, high system heat, and occupies a large space, which is very easy to cause cable compression and cable breakage. In order to ensure the safe retracting and releasing of cables and reduce cable loss;

[0004] Therefore, the utility model proposes a hydraulic control device for cable retraction and extension of an electric scraper based on the above problems. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that the existing traditional cable retracting and releasing control mode adopts motor deceleration drive and hydraulic deceleration drive. The motor deceleration drive is basically no longer used. Even for hydraulic drive, a single pressure valve control mode was used before. The retracting and releasing cables are all driven by the same pressure, and the hydraulic components are all connected by a pipe. This hydraulic system has high pressure, high system heat, and occupies a large space, which is very easy to cause cable compression and cable breakage. In order to ensure the safe retracting and releasing of cables and reduce the loss of cables,

[0006] Therefore, based on the above problem, the utility model proposes a hydraulic control device for cable retraction and release of an electric scraper. A hydraulic pump, a hydraulic motor and a hydraulic integrated block are installed on the rear frame of the scraper. The hydraulic pump, the hydraulic motor and the hydraulic integrated block are connected by an oil pipe. The remote pressure regulating valve, the low-pressure relief valve and the hydraulic reversing valve are integrated on the hydraulic integrated block with a plate structure. The inside is connected through an oil hole. The hydraulic pump sucks hydraulic oil from the hydraulic oil tank under power drive to supply oil to the hydraulic system. The hydraulic motor rotates under the action of the hydraulic oil, and drives the cable reel to rotate through the sprocket chain to retract and release the cable. The hydraulic system adopts different pressure controls when retracting and releasing the cable, and the system pressure is adjustable. The hydraulic system is in a high-pressure state when reeling in the cable, and is in a low-pressure state when releasing the cable. The control of the remote pressure regulating valve The oil port is connected to the oil inlet of the hydraulic reversing valve, and the oil outlet of the hydraulic reversing valve is connected to the oil inlet of the low-pressure relief valve. The control oil circuit of the hydraulic reversing valve is connected to the control oil circuit of the reverse clutch of the scraper loader gearbox. The control oil connects the reverse clutch of the gearbox and also connects the control oil circuit of the hydraulic reversing valve. The hydraulic reversing valve is actuated to disconnect the control oil port of the remote pressure regulating valve from the oil inlet of the low-pressure relief valve. The remote pressure regulating valve works and the hydraulic system is in a high-pressure state. When there is no control oil pressure in the hydraulic reversing valve, the hydraulic reversing valve does not work, the control oil port of the high-pressure relief valve is connected to the oil inlet of the low-pressure relief valve, the low-pressure relief valve works, and the hydraulic system is in a low-pressure state, realizing the synchronous switching of high and low pressures of the hydraulic system. The external hole of the hydraulic integrated block can be connected to a hydraulic pressure gauge to observe the set pressures of the high and low pressure relief valves.

[0007] Preferred: The hydraulic system designed in this scheme adopts high and low pressure hydraulic systems to control cable collection and release respectively. When releasing the cable, the low pressure system pressure is controlled by the low pressure relief valve, while when collecting the cable, it is controlled by the high pressure set by the remote pressure regulating valve, which reduces the cable pulling loss and the heat generation of the hydraulic system.

[0008] Optimum: the retractable cable and the hydraulic system high and low pressure are switched synchronously, the hydraulic reversing valve control oil circuit is connected to the scraper loader gearbox reverse clutch control oil circuit, when the control oil is connected to the gearbox reverse clutch, it is also connected to the control oil circuit of the hydraulic reversing valve, the hydraulic reversing valve is actuated, the remote control port of the remote pressure regulating valve is disconnected from the oil inlet of the low-pressure relief valve, the remote pressure regulating valve works, the hydraulic system is in a high-pressure state, when the gearbox reverse clutch has no control oil pressure, the hydraulic reversing valve does not work, the remote control port of the high-pressure relief valve is connected to the oil inlet of the low-pressure relief valve, the low-pressure relief valve works, the hydraulic system is in a low-pressure state, and the retractable cable and the hydraulic oil high and low pressure synchronous switching is realized.

[0009] Preferably, the hydraulic components adopt a plate structure and are placed in an integrated manner. The hydraulic valves are connected to the integrated block through hydraulic holes, which has the advantages of simple structure, convenient installation, and small size.

[0010] Preferred: The hydraulic system has a short response time and quick action for high and low pressure switching. Since the hydraulically controlled reversing valve is connected to the remote control port of the remote pressure regulating valve, the flow through the hydraulically controlled reversing valve is small, the required oil pressure is small, and the switching action is quick. Beneficial Effects

[0011] 1. The utility model adopts a hydraulic system that is in a high-pressure state when collecting and a hydraulic system that is in a low-pressure state when releasing the cable, so as to realize the pressure control of the hydraulic system for collecting and releasing the cable separately, avoiding the phenomenon of the cable being always in a high-pressure cable pulling state and thus breaking the cable, effectively protecting the cable and reducing the production cost of the mine.

[0012] 2. In the utility model, when the cable is retracted or released, the control oil port of the hydraulically controlled reversing valve is connected to the control oil of the reverse clutch of the transmission, so that the high and low pressure switching of the hydraulic system and the retracting and releasing of the cable are carried out synchronously, avoiding the occurrence of the cable crushing phenomenon caused by untimely retraction of the cable by the scraper.

[0013] 3. The hydraulic control components in the utility model all adopt a plate structure and are placed in an integrated manner, so that the hydraulic system has a simple structure, is easy to install, and occupies a small volume.

[0014] 4. In the utility model, the hydraulically controlled reversing valve is connected to the remote control port of the remote pressure regulating valve. The flow rate flowing through the hydraulically controlled reversing valve is small and the oil pressure is low, so that the reversing response is fast and the high and low pressure switching is rapid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the principle diagram of the hydraulic control system of the utility model;

[0016] Figure 2 This is a schematic diagram of the installation and connection of the hydraulic components of the utility model;

[0017] Figure 1 to Figure 2 The reference numerals in the drawings are respectively: hydraulic pump 1, oil pipe connecting the hydraulic pump and the remote pressure regulating valve 2, hydraulic pump oil suction pipe 3, oil return pipe connecting the radiator 4, hydraulic reversing valve control oil port 5, low-pressure relief valve 6, remote pressure regulating valve 7, hydraulically controlled reversing valve 8, pressure oil gauge 9, integrated valve block 10, oil pipe connecting the hydraulic motor and the remote pressure regulating valve 11, hydraulic motor 12, cable reel 13, oil pipe connecting the hydraulic motor and the low-pressure relief valve 14. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Example reference Figure 1 , Figure 2 ;

[0020] like Figure 1 , Figure 2 As shown, a hydraulic control device for cable retraction and release of an electric scraper includes a hydraulic pump 1, a hydraulic motor 12, a remote pressure regulating valve 7, a low-pressure relief valve 6, a hydraulic reversing valve 8, an integrated valve block 10, a hydraulic pressure gauge 9, etc. The hydraulic pump 1 and the integrated valve block 10 are installed on the rear frame of the scraper, the hydraulic motor 12 is installed on the cable drum 13, and drives the drum to rotate. The remote pressure regulating valve 7, the low-pressure relief valve 6 and the hydraulic reversing valve 8 are integrated on the integrated valve block 10 using a plate structure and connected through the internal oil hole of the integrated valve block 10. The hydraulic pump 1, the hydraulic motor 12 and the integrated valve block 10 are connected through an oil pipe. The control oil port of the remote pressure regulating valve 7 is connected to the oil inlet of the hydraulic reversing valve 8 through the internal oil circuit of the integrated valve block 10, the oil outlet A of the hydraulic reversing valve 8 is connected to the oil inlet of the low-pressure relief valve 6, and the control oil port 5 of the hydraulic reversing valve is connected to the control oil circuit of the reverse clutch of the scraper gearbox. The hydraulic pump 1 sucks hydraulic oil from the hydraulic pump suction pipe 3 under power drive to supply oil to the hydraulic system. The hydraulic motor 12 rotates under the action of the hydraulic oil, and drives the cable reel 13 to rotate through the sprocket chain to retract and release the cable. The pressure of the remote pressure regulating valve 7 and the low-pressure relief valve 6 can be adjusted through the pressure gauge 9. The remote pressure regulating valve 7 adjusts the pressure to high pressure, and the low-pressure relief valve 6 adjusts the pressure to low pressure.

[0021] The hydraulic control components are all plate-type and integrated, which makes the hydraulic system simple in structure, easy to install and small in footprint. The hydraulic control reversing valve is connected to the remote control port of the remote pressure regulating valve. The flow rate through the hydraulic control reversing valve is small and the oil pressure is low, which makes the reversing response fast and the high and low pressure switching fast.

[0022] The hydraulic pump 1, hydraulic motor 12 and hydraulic integrated block are installed on the rear frame of the scraper. The high-pressure relief valve, low-pressure relief valve 6 and hydraulic directional valve are installed on the hydraulic integrated block. There are interconnected hydraulic holes inside the integrated block. The external holes of the hydraulic integrated block can be connected to the hydraulic pressure gauge to observe the adjustment pressure of the high-pressure and low-pressure relief valves 6.

[0023] The cable reel 13 retracting and releasing device of the electric scraper will synchronously retract and release the cable as the scraper moves forward or backward. In the actual working process, the cable is sometimes damaged. In order to effectively protect the cable, a reasonable hydraulic control system needs to be designed to ensure that the cable retracting and releasing action switches in a timely and rapid manner and the cable tension is appropriate.

[0024] The hydraulic motor 12 drives the cable drum 13 to rotate so as to retract and release the cable. The retracting and releasing speed of the drum and the cable tension are controlled by the hydraulic system. The oil outlet of the hydraulic oil pump is directly connected to the oil inlet of the hydraulic motor 12. The remote pressure regulating valve 7 controls the working pressure of the hydraulic motor 12. The control oil port of the remote pressure regulating valve 7 is connected to the oil inlet of the hydraulic control reversing valve 8. The oil outlet of the hydraulic control reversing valve 8 is connected to the oil inlet of the low-pressure relief valve 6. The control oil circuit of the valve core of the hydraulic control reversing valve 8 is connected to the control oil circuit of the reverse clutch of the scraper gearbox.

[0025] The hydraulic oil pump supplies oil to the hydraulic control system under power drive. When the scraper loader retracts and reels the cable, the working pressure of the hydraulic system is controlled by the high-pressure relief valve. When the scraper loader moves forward and releases the cable, the working pressure of the hydraulic system is controlled by the low-pressure relief valve 6. The set pressure of the high-pressure relief valve is higher than that of the low-pressure relief valve 6. The main function of the hydraulic reversing valve is to switch the high and low pressures of the hydraulic system. Its control oil circuit is linked with the control oil circuit of the reverse clutch of the scraper gearbox. When the control oil connects the reverse clutch of the gearbox, it also connects the control oil circuit of the hydraulic reversing valve. The hydraulic reversing valve is actuated to disconnect the control oil port of the high-pressure relief valve from the oil inlet of the low-pressure relief valve 6, and the remote pressure regulating valve 7 works. The hydraulic system is in a high-pressure state. When there is no control oil pressure in the control oil circuit of the hydraulic reversing valve, the hydraulic reversing valve does not work, the control oil port of the high-pressure relief valve is connected to the low-pressure relief valve 6, the low-pressure relief valve 6 works, and the hydraulic system is in a low-pressure state, realizing the synchronous switching of the high and low pressures of the hydraulic oil in the retracting and releasing of the cable.

[0026] The overflow valve and directional reversing valve of the hydraulic system are integrated on a valve block with an oil channel inside. The hydraulic system oil pressure is easy to adjust, which saves space and ensures reliable operation of the hydraulic system, avoiding oil leakage caused by too many pipe structures.

[0027] This hydraulic device is equipped with a pressure gauge measuring device, which is convenient for adjusting the hydraulic system pressure

[0028] The operating principle of the utility model is as follows:

[0029] The hydraulic pump 1, hydraulic motor 12 and integrated valve block 10 are installed on the rear frame of the scraper. The remote pressure regulating valve 7, low-pressure relief valve 6 and hydraulic reversing valve 8 are integrated on the integrated valve block 10 with a plate structure, and the inside of the integrated valve block 10 is connected through an oil hole. The hydraulic pump 1, hydraulic motor 12 and integrated valve block 10 are connected through an oil pipe. The control oil port of the remote pressure regulating valve 7 is connected to the oil inlet of the hydraulic reversing valve 8 through the internal oil circuit of the integrated valve block 10. The oil outlet of the hydraulic reversing valve 8 is connected to the oil inlet of the low-pressure relief valve 6. The control oil port 5 of the hydraulic reversing valve is connected to the control oil circuit of the reverse clutch of the scraper gearbox.

[0030] The hydraulic pump 1 sucks hydraulic oil from the hydraulic pump suction pipe 3 under power drive to supply oil to the hydraulic system. The hydraulic motor 12 rotates under the action of the hydraulic oil, and drives the cable reel 13 to rotate through the sprocket chain to retract and release the cable. The pressure of the remote pressure regulating valve 7 and the low-pressure relief valve 6 can be adjusted through the pressure gauge 9. The remote pressure regulating valve 7 adjusts the pressure to high pressure, and the low-pressure relief valve 6 adjusts the pressure to low pressure. When the scraper loader reels in the cable, the reverse clutch control oil circuit of the gearbox is connected with pressure oil, and at the same time, the control oil circuit of the hydraulic reversing valve 8 is also connected. The hydraulic reversing valve 8 is actuated, and the control oil ports of the low-pressure relief valve 6 and the remote control valve 7 are disconnected. The pressure of the hydraulic system is controlled by the pressure set by the remote pressure regulating valve 7, and the hydraulic system is in a high-pressure state. When releasing the cable, there is no pressure oil in the control oil port of the hydraulic control reversing valve 8, the hydraulic reversing valve 8 does not work, the low-pressure relief valve 6 is connected with the control oil port of the remote control valve 7, and the hydraulic system is controlled by the low pressure set by the low-pressure relief valve 6. The hydraulic system is in a low-pressure state, realizing the synchronous switching of high and low pressure of the cable retracting and releasing and the hydraulic system.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydraulic control device for cable retraction and release of an electric scraper, characterized in that: A hydraulic pump, a hydraulic motor and a hydraulic integrated block are installed on the rear frame of the scraper. The hydraulic pump, the hydraulic motor and the hydraulic integrated block are connected by oil pipes. The remote pressure regulating valve, the low-pressure relief valve and the hydraulic reversing valve are integrated on the hydraulic integrated block with a plate structure. The internal parts are connected through oil holes. The hydraulic pump sucks hydraulic oil from the hydraulic oil tank under power drive to supply oil to the hydraulic system. The hydraulic motor rotates under the action of the hydraulic oil and drives the cable reel to rotate through the sprocket chain to retract and release the cable. The hydraulic system adopts different pressure controls when retracting and releasing the cable. The system pressure is adjustable. The hydraulic system is in a high-pressure state when reeling in the cable, and in a low-pressure state when releasing the cable. The control oil port of the remote pressure regulating valve is connected to the oil inlet of the hydraulic reversing valve. The hydraulic reversing valve The oil outlet is connected to the oil inlet of the low-pressure relief valve, and the control oil circuit of the hydraulic reversing valve is connected to the control oil circuit of the reverse clutch of the scraper loader's gearbox. The control oil connects the reverse clutch of the gearbox and also connects the control oil circuit of the hydraulic reversing valve. The hydraulic reversing valve is actuated to disconnect the control oil port of the remote pressure regulating valve from the oil inlet of the low-pressure relief valve. The remote pressure regulating valve works and the hydraulic system is in a high-pressure state; when the hydraulic reversing valve has no control oil pressure, the hydraulic reversing valve does not work, the control oil port of the high-pressure relief valve is connected to the oil inlet of the low-pressure relief valve, the low-pressure relief valve works, and the hydraulic system is in a low-pressure state, realizing the synchronous switching of high and low pressures of the hydraulic system; the external hole of the hydraulic integrated block can be connected to a hydraulic pressure gauge, and the set pressures of the high and low pressure relief valves can be observed.

2. The cable retracting and releasing hydraulic control device for an electric scraper according to claim 1 is characterized in that: The retractable cable and the hydraulic system high and low pressure are switched synchronously, and the hydraulic reversing valve control oil circuit is connected to the scraper loader gearbox reverse clutch control oil circuit. When the control oil is connected to the gearbox reverse clutch, the control oil circuit of the hydraulic reversing valve is also connected, the hydraulic reversing valve is actuated, the remote control port of the remote pressure regulating valve is disconnected from the oil inlet of the low-pressure relief valve, the remote pressure regulating valve works, and the hydraulic system is in a high-pressure state. When there is no control oil pressure in the gearbox reverse clutch, the hydraulic reversing valve does not work, the remote control port of the high-pressure relief valve is connected to the oil inlet of the low-pressure relief valve, the low-pressure relief valve works, and the hydraulic system is in a low-pressure state, realizing the synchronous switching of the retractable cable and the hydraulic oil high and low pressure.

3. The cable retracting and releasing hydraulic control device for an electric scraper according to claim 2, characterized in that: The hydraulic components adopt a plate-type structure and are placed in an integrated manner. The hydraulic valves are connected through hydraulic holes inside the integrated block.

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