Double-pump-station heightening oil way system of coal mining machine

Abstract

The utility model provides a coal mining machine double pump station height adjusting oil way system which comprises a first valve group, a second valve group and an oil way channel, the first valve group is connected with a first height adjusting oil cylinder, the second valve group is connected with a second height adjusting oil cylinder, the first valve group is connected with the second height adjusting oil cylinder through the oil way channel, and the second valve group is connected with the first height adjusting oil cylinder through the oil way channel. And the stop valve is arranged on the oil path channel and is used for controlling the on-off of the oil path channel. The device further comprises a three-way connector and a stop valve, and by controlling on-off of the stop valve, the valve set working normally can control the first height adjusting oil cylinder and the second height adjusting oil cylinder at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of coal mining machine, concretely relates to coal mining machine double pump station height adjustment oil cylinder system. BACKGROUND

[0002] Most coal mining machines adopt double pump station system of left and right pump stations, and the left and right pump station systems contain same components, such as pump motor, gear pump, valve group, filter assembly, etc., and the connection relationship of each component is also same, but the oil circuit and control of both are independent of each other and are integrated in the left and right traction parts of the coal mining machine. Normally, the left pump station system controls the lifting of the left height adjustment oil cylinder to realize the amplitude adjustment of the left swing arm of the coal mining machine when cutting coal rock, and the right pump station system controls the lifting of the right height adjustment oil cylinder to realize the amplitude adjustment of the right swing arm of the coal mining machine when cutting coal rock.

[0003] When one side pump station system fails, such as pump motor, gear pump or valve group fails to work normally, the other side pump station system cannot provide support for the pump station that has failed, which delays normal production. SUMMARY

[0004] In view of the above-mentioned defects of the prior art, the purpose of the utility model is to provide a coal mining machine double pump station height adjustment oil circuit system, when any pump motor assembly or any valve group fails, the valve group and pump motor assembly of the normally working side can control two height adjustment oil cylinders at the same time.

[0005] The application provides a coal mining machine double pump station height adjustment oil circuit system, which comprises a first valve group, a second valve group and an oil circuit channel, the first valve group is connected with a first height adjustment oil cylinder, the second valve group is connected with a second height adjustment oil cylinder, the first valve group is connected with the second height adjustment oil cylinder through the oil circuit channel, and the second valve group is connected with the first height adjustment oil cylinder through the oil circuit channel.

[0006] Preferably, the oil circuit channel comprises two or more than two passages, the first valve group and the second valve group each comprise two or more than two connecting ports, and the oil circuit channel is connected with the first valve group and the second valve group through the connecting ports.

[0007] Preferably, the coal mining machine double pump station height adjustment oil circuit system further comprises a tee joint located on the oil circuit channel, a first end of the tee joint is connected with any connecting port of the first valve group, a second end of the tee joint is connected with any connecting port of the second valve group, and a third end of the tee joint is connected with the first height adjustment oil cylinder or the second height adjustment oil cylinder.

[0008] Preferably, the coal mining machine double pump station height adjustment oil circuit system further comprises a stop valve located on the oil circuit channel and used for controlling the on-off of the oil circuit channel.

[0009] Preferably, the stop valve comprises a first stop valve and a second stop valve, the first stop valve is connected with the first end of the tee joint, and the second stop valve is located at the second end of the tee joint.

[0010] Preferably, when the second valve group is in normal working condition, the first shut-off valve is in the open state and the second shut-off valve is in the closed state; when the second valve group malfunctions, the first shut-off valve is in the closed state and the second shut-off valve is in the open state.

[0011] Preferably, the oil circuit includes a first channel and a second channel, the first valve group includes a first connection port and a second connection port, and the second valve group includes a seventh connection port and an eighth connection port. In the first channel, the first connection port is connected to both the first height-adjusting cylinder and the seventh connection port via a three-way connector. In the second channel, the second connection port is connected to both the first height-adjusting cylinder and the eighth connection port via a three-way connector. The first shut-off valve is located in the passage from the first or second connection port to the three-way connector, and the second shut-off valve is located in the passage from the three-way connector to both the seventh and eighth connection ports.

[0012] Preferably, the oil circuit channel further includes a third channel and a fourth channel, the first valve group further includes a third connection port and a fourth connection port, and the second valve group includes a fifth connection port and a sixth connection port. On the third channel, the third connection port is connected to the fifth connection port and the second height adjustment cylinder via a tee connector. On the fourth channel, the fourth connection port is connected to the sixth connection port and the second height adjustment cylinder via a tee connector. The first shut-off valve is located in the passage from the fifth or sixth connection port to the tee connector, and the second shut-off valve is located in the passage from the tee connector to the third and fourth connection ports.

[0013] In summary, the oil circuit channel utilized in this application enables any valve group and any height adjustment cylinder to be connected, and the on / off of the channel is controlled by a shut-off valve, so that when any pump motor assembly or any valve group fails, the valve group and pump motor assembly on the normal operating side can simultaneously control the action of two height adjustment cylinders, thereby achieving the effect of "one driving two". Attached Figure Description

[0014] Figure 1 The diagram shows the structure of the dual-pump station height adjustment oil circuit system of the coal mining machine of this application.

[0015] Component designation explanation

[0016] 100-Coal Mining Machine Dual Pump Station Height Adjustment Oil Circuit System

[0017] 1-First Valve Group

[0018] 11-First Connection Port

[0019] 12-Second Connection Port

[0020] 13-Third connection port

[0021] 14-Fourth Connection Port

[0022] 2-Second Valve Group

[0023] 21-Fifth Connection Port

[0024] 22-Sixth Connection Port

[0025] 23-Seventh Connection Port

[0026] 24-Eighth Connection Port

[0027] 3-Pump Motor Assembly

[0028] 4-oil passage

[0029] 41-First Channel

[0030] 42-Second Channel

[0031] 43-Third Channel

[0032] 44-Fourth Channel

[0033] 5-Oil Pool

[0034] 61-First Height Adjustment Cylinder

[0035] 611 - First Oil Inlet

[0036] 612 - First oil outlet

[0037] 62-Second Height Adjustment Cylinder

[0038] 621 - Second Oil Inlet

[0039] 622 - Second oil outlet

[0040] 7 – Shut-off valve

[0041] 71-First shut-off valve

[0042] 72-Second shut-off valve

[0043] P-Tee connector Detailed Implementation

[0044] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0045] Please see Figure 1It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0046] like Figure 1 As shown, the dual-pump station height adjustment oil circuit system 100 of the coal mining machine includes a first valve group 1, a second valve group 2, a pump motor assembly 3, and an oil circuit channel 4. The two pump motor assemblies 3 are respectively connected to the first valve group 1 and the second valve group 2, and are used to draw oil from the oil sump 5 through the first valve group 1 or the second valve group 2 into the first height adjustment cylinder 61 or the second height adjustment cylinder 62, thereby driving the piston rod of the first height adjustment cylinder 61 or the second height adjustment cylinder 62 to achieve the lifting and lowering function of the rocker arm. The first valve group 1 or the second valve group 2 is connected to the first height adjustment cylinder 61 or the second height adjustment cylinder 62 through the oil circuit channel 4.

[0047] The pump motor assembly 3 includes a pump motor, a gear pump, a fine filter, and a coarse filter. Configuring the quantity and connection relationships of these tools is a conventional technique in the field, and different operators can set it according to their needs.

[0048] The oil passage 4 includes a first passage 41, a second passage 42, a third passage 43, and a fourth passage 44. The first valve group 1 has a first connection port 11, a second connection port 12, a third connection port 13, and a fourth connection port 14. Correspondingly, the second valve group 2 has a fifth connection port 21, a sixth connection port 22, a seventh connection port 23, and an eighth connection port 24. Specifically, the first connection port 11 connects to the seventh connection port 23 via the first passage 41; the second connection port 12 connects to the eighth connection port 24 via the second passage 42; the third connection port 13 connects to the fifth connection port 21 via the third passage 43; and the fourth connection port 14 connects to the sixth connection port 22 via the fourth passage 44. Simultaneously, the first connection port 11 also connects to the first oil inlet 611 of the first height-adjusting cylinder 61; the second connection port 12 also connects to the first oil outlet 612; the fifth connection port 21 also connects to the second oil inlet 621 of the second height-adjusting cylinder 62; and the sixth connection port 22 also connects to the second oil outlet 622 of the second height-adjusting cylinder 62.

[0049] In one embodiment, a tee connector P located on the oil passage 4 is also included. Taking the first passage 41 as an example, the first end of the tee connector P is connected to the first connection port 11, the second end is connected to the first oil inlet 611, and the third end is connected to the seventh connection port 23, simplifying the passage structure at the first connection port 11. Similarly, a tee connector is provided on the second passage 42, the third passage 43, and the fourth passage 44 respectively. The first end of the tee connector is connected to the first valve group 1, the second end is connected to the first height adjustment cylinder 61 or the second height adjustment cylinder 62, and the third end is connected to the second valve group 2.

[0050] In another embodiment, the coal mining machine dual-pump station height adjustment oil circuit system 100 also includes a shut-off valve 7 located on the oil circuit channel 4 to control the opening and closing of the oil circuit channel 4. Specifically, a first shut-off valve 71 and a second shut-off valve 72 are provided on the first channel 41. The first shut-off valve 71 is located between the first connection port 11 and the first oil inlet port 611, and the second shut-off valve 72 is located between the first connection port 11 and the seventh connection port 23. Similarly, a first shut-off valve 71 is also provided on the second channel 42 between the second connection port 12 and the first oil outlet port 612, and a second shut-off valve 72 is provided between the second connection port 12 and the eighth connection port 24.

[0051] Similarly, on the third channel 43, a first shut-off valve 71 is provided between the fifth connection port 21 and the second oil inlet port 621, and between the sixth connection port 22 and the second oil outlet port 622; and a second shut-off valve 72 is provided between the fifth connection port 21 and the third connection port 13, and between the sixth connection port 22 and the fourth connection port 14.

[0052] Preferably, the shut-off valve is a high-pressure ball shut-off valve.

[0053] In a preferred embodiment, on the first channel 41, the first connection port 11 is connected to the first oil inlet port 611 and the seventh connection port 23 respectively through a three-way connector P. A first shut-off valve 71 is provided between the first connection port 11 and the three-way connector P, and a second shut-off valve 72 is provided between the three-way connector P and the seventh connection port 23. Similarly, on the second channel 42, the second connection port 12 is connected to the first oil outlet 612 and the eighth connection port 24 respectively through another tee connector P. A first shut-off valve 71 is installed between the second connection port 12 and the tee connector P, and a second shut-off valve 72 is installed between the tee connector P and the eighth connection port 24. On the third channel 43, the third connection port 13 is connected to the fifth connection port 21 and the second oil inlet 621 respectively through another tee connector P. A first shut-off valve 71 is installed between the fifth connection port 21 and the tee connector P, and a second shut-off valve 72 is installed between the third connection port 13 and the tee connector P. On the fourth channel 44, the fourth connection port 14 is connected to the sixth connection port 22 and the second oil outlet 622 respectively through another tee connector P. A first shut-off valve 71 is installed between the sixth connection port 21 and the tee connector P, and a second shut-off valve 72 is installed between the fourth connection port 14 and the tee connector P.

[0054] Taking the first valve group 1 as an example, the on / off setting of the oil passage 4 is explained. Under normal operating conditions, the first shut-off valve 71 is open, ensuring unobstructed flow between the first connection port 11 and the first oil inlet 611, and between the second connection port 12 and the first oil outlet 612. The second shut-off valve 72 is closed, closing the connection between the first connection port 11 and the seventh connection port 23, and closing the connection between the second connection port 12 and the eighth connection port 24. This means that the first valve group 1 controls the first height-adjusting cylinder 61. Similarly, by controlling the on / off state of the first and second shut-off valves, the second valve group controls the second height-adjusting cylinder 62.

[0055] When any pump motor assembly 3 or any valve group malfunctions, the first height adjustment cylinder 61 or the second height adjustment cylinder 62 is controlled by another pump motor assembly 3 through the opening and closing of the control shut-off valve 7. Specifically, if the pump motor assembly 3 connected to the first valve group 1 malfunctions, the first shut-off valve 71 between the first connection port 11 and the first oil inlet 611 and between the second connection port 12 and the first oil outlet 612 is closed, the second shut-off valve 72 between the first connection port 11 and the seventh connection port 23 and between the second connection port 12 and the eighth connection port 24 is opened, and the first shut-off valve 71 between the fifth connection port 21 and the second oil inlet 621 and between the sixth connection port 22 and the second oil outlet 622 is opened, and the second valve group 2 simultaneously controls the first height adjustment cylinder 61 and the second height adjustment cylinder 62. Close the first shut-off valve on the fault side to prevent oil from flowing back to the oil sump on the fault side through the valve group on the fault side. Open the first shut-off valve on the normal operating side and the second shut-off valve in the oil circuit channel. The pump motor assembly on the normal operating side controls the lifting cylinder on the fault side.

[0056] This application utilizes the unused third and fourth connection ports 13 and 14, seventh and eighth connection ports 23 and 24 to form an oil circuit channel 4, enabling any valve group and any height adjustment cylinder to be connected. By using a shut-off valve to control the opening and closing of the channel, when any pump motor assembly or valve group fails, the valve group and pump motor assembly on the normal operating side can simultaneously control the action of two height adjustment cylinders, thereby achieving the effect of "one driving two".

[0057] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A dual-pump station height adjustment oil circuit system for a coal mining machine, characterized in that, It includes a first valve group, a second valve group, and an oil passage. The first valve group is connected to a first height adjustment cylinder, and the second valve group is connected to a second height adjustment cylinder. The first valve group is connected to the second height adjustment cylinder through the oil passage, and the second valve group is connected to the first height adjustment cylinder through the oil passage.

2. The coal mining machine dual-pump station height adjustment oil circuit system as described in claim 1, characterized in that, It also includes a three-way connector located on the oil passage, with the first end of the three-way connector connected to the first valve group, the second end of the three-way connector connected to the second valve group, and the third end of the three-way connector connected to the first height adjustment cylinder or the second height adjustment cylinder.

3. The coal mining machine dual-pump station height adjustment oil circuit system as described in claim 2, characterized in that, It also includes a shut-off valve located on the oil passage for controlling the opening and closing of the oil passage.

4. The coal mining machine dual-pump station height adjustment oil circuit system as described in claim 3, characterized in that, The shut-off valve includes a first shut-off valve and a second shut-off valve. The first shut-off valve is connected to the first end of the three-way connector, and the second shut-off valve is located at the second end of the three-way connector.

5. The coal mining machine dual-pump station height adjustment oil circuit system as described in claim 4, characterized in that, When the second valve group is in normal working condition, the first shut-off valve is in the open state and the second shut-off valve is in the closed state; when the second valve group malfunctions, the first shut-off valve is in the closed state and the second shut-off valve is in the open state.

6. The coal mining machine dual-pump station height adjustment oil circuit system as described in claim 4, characterized in that, The oil passage includes two or more passages, and the first valve group and the second valve group each include two or more connection ports. The oil passage connects the first valve group and the second valve group through the connection ports.

7. The coal mining machine dual-pump station height adjustment oil circuit system as described in claim 6, characterized in that, The oil circuit includes a first channel and a second channel. The first valve group includes a first connection port and a second connection port. The second valve group includes a seventh connection port and an eighth connection port. On the first channel, the first connection port is connected to both the first height-adjusting cylinder and the seventh connection port via the three-way connector. On the second channel, the second connection port is connected to both the first height-adjusting cylinder and the eighth connection port via the three-way connector. The first shut-off valve is located in the passage from the first connection port or the second connection port to the three-way connector. The second shut-off valve is located in the passage from the three-way connector to both the seventh and eighth connection ports.

8. The coal mining machine dual-pump station height adjustment oil circuit system as described in claim 7, characterized in that, The oil circuit channel further includes a third channel and a fourth channel. The first valve group further includes a third connection port and a fourth connection port. The second valve group includes a fifth connection port and a sixth connection port. On the third channel, the third connection port is connected to the fifth connection port and the second height adjustment cylinder via a three-way connector. On the fourth channel, the fourth connection port is connected to the sixth connection port and the second height adjustment cylinder via the three-way connector. The first shut-off valve is located in the passage from the fifth connection port or the sixth connection port to the three-way connector. The second shut-off valve is located in the passage from the three-way connector to the third connection port and the fourth connection port.

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