Hydraulic double-circuit switching device for front baffle of tail coal feeder of belt conveyor

Abstract

The utility model discloses a kind of hydraulic double-loop switching devices of front baffle of coal feeder of belt conveyor tail, the oil outlet end of first oil pump is connected to the oil inlet end of four-way valve by pipeline, the oil outlet end of four-way valve is connected with the oil inlet end of coal feeder front baffle oil cylinder, the oil return end of coal feeder front baffle oil cylinder is communicated with the oil return port of four-way valve by pipeline, the oil return end outlet of four-way valve is communicated with the oil return end of first oil pump, the oil outlet end of second oil pump is communicated with the oil inlet of control valve by pipeline, the oil outlet of control valve is communicated with the oil inlet end of coal feeder front baffle oil cylinder by pipeline, the oil return port of coal feeder front baffle oil cylinder is communicated with the oil return port of control valve, the oil return end of control valve is communicated with the oil inlet of second oil pump, two hydraulic circuits are connected in parallel, facilitate driver operation, realize double-loop switching, when one oil pump has fault, it can be switched to another oil pump to work, satisfy driver remote control operation, timely open, close front baffle, prevent the occurrence of coal surge accident.

Description

Technical Field

[0001] This utility model relates to the technical field of control equipment for the front baffle of a coal feeder, specifically a hydraulic dual-circuit switching device for the front baffle of a belt conveyor tail coal feeder. Background Technology

[0002] Currently, the front baffle of the coal feeder at the tail of our mine's belt conveyor can only be operated on the local platform, which prevents remote operators from making real-time adjustments based on actual conditions. In addition, the current baffle relies on oil pump power. If the oil pump fails, the baffle will not be able to close, which will not only seriously affect the normal coal output of the mining area, but may also lead to serious coal inrush accidents, posing a major safety hazard. Utility Model Content

[0003] The purpose of this utility model is to provide a hydraulic dual-circuit switching device for the front baffle of the coal feeder at the tail of the belt conveyor, so as to solve the problem that the front baffle of the coal feeder at the tail of the belt conveyor can only be operated on the local platform, which makes it impossible for the remote driver to make real-time adjustments according to the actual situation. In addition, the front baffle relies on the power of the oil pump. Once the oil pump fails, the baffle will not be able to close, which will not only seriously affect the normal coal output of the mining area, but may also lead to serious coal inrush accidents.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic dual-circuit switching device for the front baffle of a belt conveyor tail feeder, comprising two control circuits, both used to operate the hydraulic cylinder of the feeder front baffle. The first control circuit includes a first oil pump, a four-way valve, and a feeder front baffle cylinder. The oil outlet of the first oil pump is connected to the oil inlet of the four-way valve via a pipeline. The four-way valve is installed on the coal feeder operating platform. The oil outlet of the four-way valve is connected to the oil inlet of the coal feeder's front baffle cylinder. The oil return end of the coal feeder's front baffle cylinder is connected to the oil return port of the four-way valve via a pipeline. The oil return outlet of the four-way valve is connected to the oil return end of the first oil pump, forming a circulation path. The second control loop includes a second oil pump and a control valve located in the driver's cab. The oil outlet of the second oil pump is connected to the oil inlet of the control valve via a pipeline. The oil outlet of the control valve is connected to the oil inlet of the feeder front baffle cylinder via a pipeline. The oil return outlet of the feeder front baffle cylinder is connected to the oil return port of the control valve. The oil return port of the control valve is connected to the oil inlet of the second oil pump, forming a circulation path. The first control loop and the second control loop are connected in parallel.

[0005] Preferably, the return oil end pipeline of the first oil pump, the return oil end pipeline of the four-way valve, and the return oil end pipeline of the second oil pump form a three-way pipeline.

[0006] Preferably, the oil outlet pipeline of the first oil pump, the oil outlet pipeline of the four-way valve, and the oil outlet pipeline of the second oil pump form a three-way pipeline.

[0007] Preferably, the return oil pipeline of the four-way valve and the outlet oil pipeline of the feeder front baffle cylinder and the control valve form a three-way pipeline.

[0008] Preferably, the oil outlet pipeline of the four-way valve and the oil return pipeline of the front baffle cylinder of the coal feeder and the control valve form a three-way pipeline.

[0009] Preferably, a first shut-off valve is provided on the parallel pipeline of the first oil pump and the second oil pump respectively.

[0010] Preferably, the oil outlet pipeline and the oil inlet pipeline of the second oil pump are respectively equipped with a second shut-off valve.

[0011] Compared with the prior art, the beneficial effects of this utility model are: By connecting the two hydraulic circuits in parallel, it is convenient for the driver to operate and achieve dual-circuit switching. When one oil pump fails, it can be switched to the other oil pump to work, which meets the driver's remote control operation, and can open and close the front baffle in time to prevent coal gushing accidents. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] In the diagram: 1. First oil pump; 2. Four-way valve; 3. Coal feeder front baffle cylinder; 4. Second oil pump; 5. Control valve; 6. First shut-off valve; 7. Second shut-off valve. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0015] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example 1: Please refer to Figure 1 This utility model provides an embodiment of a hydraulic dual-circuit switching device for the front baffle of a belt conveyor tail feeder. It includes two control circuits, both used to operate the feeder front baffle cylinder 3, which is the final operating object of the entire system. It converts the pressure energy of hydraulic oil into mechanical energy to drive the front baffle to open or close, thereby controlling the coal feed rate. A first oil pump 1 and a second oil pump 4 provide pressurized hydraulic oil to the first and second control circuits respectively, serving as the system's power source. The dual-pump design allows for opening and closing from the feeder operating platform and also meets the driver's remote control requirements, enabling timely opening and closing of the front baffle to prevent coal spillage accidents. If either the first oil pump 1 or the second oil pump 4 fails, the system can quickly switch to the other system to continue operation, greatly reducing downtime caused by hydraulic system failures and avoiding disruption to coal production during pump repairs, effectively preventing coal spillage accidents. The first control circuit includes the first oil pump 1, a four-way valve 2, and the feeder front baffle cylinder 3. The outlet of the first oil pump 1 is connected to the inlet of the four-way valve 2 via a pipeline. The four-way valve 2 is installed on the coal feeder operating platform and is a manual multi-way directional valve. Operators can control the extension, retraction, and stop of the oil cylinder by operating this valve on-site. The outlet of the four-way valve 2 is connected to the inlet of the coal feeder front baffle cylinder 3. The return end of the coal feeder front baffle cylinder 3 is connected to the return port of the four-way valve 2 via a pipeline. The outlet of the return end of the four-way valve 2 is connected to the return end of the first oil pump 1, forming a circulation path. Operating the four-way valve 2 controls the movement of the coal feeder front baffle cylinder 3. The second control loop includes a second oil pump 4 and a control valve 5 located in the driver's cab. Installed in the driver's cab, its function is similar to the four-way valve 2, enabling remote control. The driver can operate the front baffle of the coal feeder without being physically present. The oil outlet of the second oil pump 4 is connected to the oil inlet of the control valve 5 via a pipeline. The oil outlet of the control valve 5 is connected to the oil inlet of the front baffle cylinder 3 of the coal feeder via a pipeline. The oil return outlet of the front baffle cylinder 3 is connected to the oil return port of the control valve 5, and the oil return port of the control valve 5 is connected to the oil inlet of the second oil pump 4, forming a circulation path. Operating the control valve 5 located in the driver's cab controls the movement of the front baffle cylinder 3 of the coal feeder. The first and second control loops are connected in parallel. The return oil pipeline of the first oil pump 1, the return oil pipeline of the four-way valve 2, and the return oil pipeline of the second oil pump 4 form a three-way pipeline. The outlet oil pipeline of the first oil pump 1, the outlet oil pipeline of the four-way valve 2, and the outlet oil pipeline of the second oil pump 4 form a three-way pipeline. The return oil pipeline of the four-way valve 2, the outlet oil pipeline of the feeder front baffle cylinder 3, and the control valve 5 form a three-way pipeline. The outlet oil pipeline of the four-way valve 2, the return oil pipeline of the feeder front baffle cylinder 3, and the control valve 5 form a three-way pipeline. A first shut-off valve 6 is installed on the parallel pipeline of the first oil pump 1 and the second oil pump 4. The first shut-off valve 6 installed on the parallel pipeline of the inlet and outlet of the first oil pump 1 is used to isolate the first oil pump 1 and its entire circuit from the system for maintenance or switching to a standby circuit. A second shut-off valve 7 is installed on the outlet oil pipeline and the inlet oil pipeline of the second oil pump 4. The driver can operate the front baffle on the platform or remotely from the control room using the first oil pump 1.

[0019] If the first oil pump 1 malfunctions, the operation can be switched to the second oil pump 4 to open and close the front baffle. If the second oil pump 4 malfunctions, the operation can be switched to the first oil pump 1 to open and close the front baffle.

[0020] The above description is merely an embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hydraulic dual-circuit switching device for the front baffle of a belt conveyor tail feeder, characterized in that: It includes two control loops, both used to operate the front baffle cylinder of the coal feeder (3). The first control circuit includes a first oil pump (1), a four-way valve (2), and a front baffle cylinder for the coal feeder (3). The oil outlet of the first oil pump (1) is connected to the oil inlet of the four-way valve (2) through a pipeline. The four-way valve (2) is installed on the coal feeder operating platform. The oil outlet of the four-way valve (2) is connected to the oil inlet of the coal feeder front baffle cylinder (3). The oil return end of the coal feeder front baffle cylinder (3) is connected to the oil return port of the four-way valve (2) through a pipeline. The oil return outlet of the four-way valve (2) is connected to the oil return end of the first oil pump (1), forming a circulation path. The second control loop includes a second oil pump (4) and a control valve (5) located in the driver's cab. The oil outlet of the second oil pump (4) is connected to the oil inlet of the control valve (5) through a pipeline. The oil outlet of the control valve (5) is connected to the oil inlet of the feeder front baffle cylinder (3) through a pipeline. The oil return outlet of the feeder front baffle cylinder (3) is connected to the oil return port of the control valve (5). The oil return port of the control valve (5) is connected to the oil inlet of the second oil pump (4), forming a circulation path. The first control loop and the second control loop are connected in parallel.

2. The hydraulic dual-circuit switching device for the front baffle of a belt conveyor tail feeder according to claim 1, characterized in that: The return oil end pipeline of the first oil pump (1), the return oil end pipeline of the four-way valve (2), and the return oil end pipeline of the second oil pump (4) form a three-way pipeline.

3. The hydraulic dual-circuit switching device for the front baffle of a belt conveyor tail feeder according to claim 1, characterized in that: The oil outlet pipeline of the first oil pump (1), the oil outlet pipeline of the four-way valve (2), and the oil outlet pipeline of the second oil pump (4) form a three-way pipeline.

4. The hydraulic dual-circuit switching device for the front baffle of a belt conveyor tail feeder according to claim 1, characterized in that: The return oil pipeline of the four-way valve (2) and the oil outlet pipeline of the feeder front baffle cylinder (3) and control valve (5) form a three-way pipeline.

5. The hydraulic dual-circuit switching device for the front baffle of a belt conveyor tail feeder according to claim 1, characterized in that: The oil outlet pipeline of the four-way valve (2) and the oil return pipeline of the front baffle cylinder (3) of the coal feeder and the control valve (5) form a three-way pipeline.

6. The hydraulic dual-circuit switching device for the front baffle of a belt conveyor tail feeder according to claim 1, characterized in that: A first shut-off valve (6) is provided on the parallel pipeline of the first oil pump (1) and the second oil pump (4).

7. The hydraulic dual-circuit switching device for the front baffle of a belt conveyor tail feeder according to claim 1, characterized in that: The second oil pump (4) is equipped with a second shut-off valve (7) on the oil outlet pipe and the oil inlet pipe respectively.

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