Automatically-controlled reversed loader telescopic machine head

Abstract

The utility model relates to the technical field of coal mine machinery, in particular to an automatic control reversed loader telescopic machine head which comprises a machine head frame, a rear groove body, a hydraulic cylinder, a controller, an electro-hydraulic reversing valve, a pressure sensor, a safety valve and a pressure gauge. The stroke sensor is arranged in the hydraulic cylinder, the pressure sensor is connected with a rodless cavity of the hydraulic cylinder, the controller monitors data such as pressure and stroke of the rodless cavity of the hydraulic cylinder of the telescopic machine head of the reversed loader in real time, automatic control over the telescopic machine head is achieved through instructions sent by the controller to the electro-hydraulic directional control valve, the service life of a chain can be effectively prolonged, and the service life of the chain is prolonged. And the intelligent and automatic levels of the telescopic machine head of the reversed loader are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine machinery, in particular to an automatically controlled telescopic head of a transfer machine. Background Art

[0002] The transfer machine is one of the indispensable equipment in the fully mechanized mining face of coal mines. It is arranged in the transport lane of the working face and vertically overlapped with the scraper conveyor of the coal mining face. After the raw coal transported by the scraper conveyor falls on the transfer machine, the transfer machine is responsible for lifting the transported raw coal and transporting it to the belt conveyor. During the use of the equipment, the scraper chain of the transfer machine will undergo elastic and plastic deformation. In order to ensure the safe and efficient operation of the equipment, the loose chain must be tightened. The traditional transfer machine telescopic head is manually operated by the valve group, and the tightness of the chain is judged by experience. The work efficiency is low, and the tightness of the chain cannot be discovered and handled in time, resulting in failure. Summary of the invention

[0003] The utility model provides an automatically controlled telescopic head of a transfer machine, which monitors the data of a chain tensioning system in real time through a controller system, adjusts the tensioning force of the chain according to actual use requirements of the equipment, and does not require manual operation, thereby improving the intelligence and automation level of the telescopic head of the transfer machine.

[0004] The technical solution adopted by the utility model to solve the technical problem is: an automatically controlled retractable head of a transfer machine, including a head frame 1, a rear tank 2, a hydraulic cylinder 3, a pressure sensor 4, a hydraulically controlled one-way valve 5, a controller 6, a stroke sensor 7, and an electro-hydraulic reversing valve 8. A control program is set in the controller 6, the pressure measured by the pressure sensor 4 is converted into a current signal and transmitted to the controller 6, the stroke sensor 7 measures the extension length of the hydraulic cylinder 3 and converts it into a voltage signal and transmits it to the controller 6, and compares it with the control program parameters set in the controller 6, sends a command to the electro-hydraulic reversing valve 5 to perform a retractable operation on the hydraulic cylinder, and when the collected data is within the preset parameter range, the system stops the action.

[0005] In the automatic control retractable head of the transfer machine, a stroke sensor 7 is arranged in the hydraulic cylinder 3, and a hydraulic control check valve 5, a pressure gauge 9 and a safety valve 10 are arranged in the fluid system. When the hydraulic cylinder 3 stops moving, the hydraulic control check valve 5 is used to lock the rodless chamber fluid circuit of the hydraulic cylinder 3, and the pressure sensor 4 is connected to the rodless chamber fluid circuit of the hydraulic cylinder 3 to monitor the pressure of the rodless chamber of the hydraulic cylinder 3.

[0006] The described automatic control transfer machine telescopic head has an electro-hydraulic reversing valve 8 and a hydraulic cylinder 3 connected by a hydraulic pipeline for inlet and return fluids, and the electro-hydraulic reversing valve 8 cable, the stroke sensor 7 cable and the pressure sensor 4 cable are connected to the controller 6.

[0007] The beneficial effects of the utility model are: an automatically controlled transfer machine telescopic head, which monitors the real-time pressure and stroke data of the hydraulic cylinder through the controller, can timely handle the chain tension, hydraulic cylinder extension and contraction and other conditions, improve work efficiency, ensure the normal operation of the transfer machine, and improve the intelligence and automation level of the transfer machine telescopic head. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The utility model is a schematic diagram of the structure of a telescopic head of an automatic transfer machine.

[0009] Figure 2 It is a principle schematic diagram of the hydraulic control system of the utility model.

[0010] As shown in the figure, 1, head frame, 2, rear tank, 3, hydraulic cylinder, 4, pressure sensor, 5, hydraulically controlled one-way valve, 6, controller, 7, stroke sensor, 8, electro-hydraulic reversing valve, 9, pressure gauge, 10, safety valve, P, total liquid inlet, R, total liquid return. DETAILED DESCRIPTION

[0011] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation schemes: The utility model is an automatically controlled retractable head of a transfer machine: comprising a head frame 1, a rear tank body 2, a hydraulic cylinder 3, a pressure sensor 4, a hydraulically controlled one-way valve 5, a controller 6, and an electro-hydraulic reversing valve 8. The retractable head of the transfer machine is composed of a head frame 1, a rear tank body 2, and a hydraulic cylinder 3. The head frame 1 and the rear tank body 2 are connected to the hydraulic cylinder 3 arranged on the side. A stroke sensor 7 is arranged in the hydraulic cylinder 3, and a hydraulically controlled one-way valve 8, a pressure gauge 9, and a safety valve 10 are arranged in the hydraulic system. A control program is arranged in the controller 6 to set the preload parameter range of the scraper chain and the stroke range of the hydraulic cylinder 3. The pressure sensor 4 is connected to the rodless chamber fluid path of the hydraulic cylinder 3 to monitor the pressure of the rodless chamber of the hydraulic cylinder 3. The data signals of the pressure sensor 4 and the stroke sensor 7 are uploaded to the control system, and the screen of the controller 6 displays the real-time pressure and stroke data of the hydraulic cylinder 3. The total liquid inlet P and total liquid return R pipelines are connected to the electro-hydraulic reversing valve 8, and the controller 6 and the hydraulic system are fixed to the rear tank body 2 by bolts.

[0012] When the transfer machine is working, when the value uploaded by the pressure sensor 4 to the controller 6 is lower than the set pressure lower limit, the control system in the controller 6 issues a command, the electro-hydraulic reversing valve 8 is actuated, the emulsion enters the hydraulic cylinder 3 through the electro-hydraulic reversing valve 8 and extends the piston rod, and the head frame 1 moves slowly relative to the rear tank 2 under the action of the hydraulic cylinder 3. When the pressure value of the pressure sensor 4 monitored by the controller 6 reaches the set pressure upper limit or the maximum stroke set by the stroke sensor 7, the controller 6 cuts off the action command of the electromagnetic reversing valve 8, and the electro-hydraulic reversing valve 8 stops acting; when the transfer machine stops or the load is too large and exceeds the set pressure upper limit, the controller 6 issues a command to the electro-hydraulic reversing valve 8 to retract the hydraulic cylinder 3. When the hydraulic cylinder 3 stops acting, the hydraulic control check valve 5 is used to lock the liquid circuit, and the safety valve 10 plays an important protective role in the use of the hydraulic cylinder. The automatically controlled retractable head of the transfer machine can make the transfer machine chain in the best working state, improve work efficiency, ensure the normal operation of the transfer machine, and improve the intelligence and automation level of the retractable head of the transfer machine.

[0013] It should be understood that the above detailed description of the technical solution of the utility model with the help of preferred embodiments is illustrative rather than restrictive, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An automatically controlled retractable head of a transfer machine, characterized in that: The invention comprises a head frame (1), a rear tank body (2), a hydraulic cylinder (3), a pressure sensor (4), a hydraulically controlled one-way valve (5), a controller (6), a stroke sensor (7), and an electro-hydraulic reversing valve (8); a control program is set in the controller (6); the pressure measured by the pressure sensor (4) is converted into a current signal and transmitted to the controller (6); the stroke sensor (7) measures the extension length of the hydraulic cylinder (3) and converts it into a voltage signal and transmits it to the controller (6); and the voltage signal is compared with the control program parameters set in the controller (6); an instruction is issued to the hydraulically controlled one-way valve (5) to extend and retract the hydraulic cylinder; when the collected data is within the preset parameter range, the system stops the action.

2. The automatic control transfer machine telescopic head according to claim 1, characterized in that: A stroke sensor (7) is arranged in the hydraulic cylinder (3), and a hydraulically controlled one-way valve (5), a pressure gauge (9) and a safety valve (10) are arranged in the hydraulic circuit system; when the hydraulic cylinder (3) stops moving, the hydraulically controlled one-way valve (5) is used to lock the hydraulic circuit of the rodless chamber of the hydraulic cylinder (3), and the pressure sensor (4) is connected to the hydraulic circuit of the rodless chamber of the hydraulic cylinder (3) to monitor the pressure of the rodless chamber of the hydraulic cylinder (3).

3. The automatic control transfer machine telescopic head according to claim 1, characterized in that: The inlet and return fluids between the electro-hydraulic reversing valve (8) and the hydraulic cylinder (3) are connected by a hydraulic pipeline, and the cable of the electro-hydraulic reversing valve (8), the cable of the stroke sensor (7) and the cable of the pressure sensor (4) are connected to the controller (6).

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