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

Abstract

The invention provides a coal mining machine double-pump-station heightening oil way system which comprises a first valve bank, a second valve bank and an oil way channel, the first valve bank is connected with a first heightening oil cylinder, the second valve bank is connected with a second heightening oil cylinder, the first valve bank is connected with the second heightening oil cylinder through the oil way channel, and the second valve bank is connected with the first heightening 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 invention relates to the field of coal mining machines, and in particular to a double pump station height adjustment oil cylinder system for coal mining machines. Background Art

[0002] Most coal mining machines use a dual pump station system of left and right pump stations. The left and right pump station systems contain the same components, such as: pump motor, gear pump, valve group, filter assembly, etc. The connection relationship of each component is also the same, but the oil circuits and controls of the two are independent of each other and are integrated into the left traction part and the right traction part of the coal mining machine respectively. Normally, the left pump station system controls the lifting and lowering of the left height adjustment cylinder to achieve the amplitude adjustment of the left rocker arm of the coal mining machine when cutting coal and rock, and the right pump station system controls the lifting and lowering of the right height adjustment cylinder to achieve the amplitude adjustment of the right rocker arm of the coal mining machine when cutting coal and rock.

[0003] When a pump station system on one side fails, such as a pump motor, gear pump or valve group fails to work properly, the pump station system on the other side cannot provide support to the failed pump station, delaying normal production. Summary of the invention

[0004] In view of the shortcomings of the prior art mentioned above, the object of the present invention is to provide a coal mining machine dual pump station height adjustment oil circuit system. When any pump motor assembly or any valve group fails, the two height adjustment cylinders can be controlled simultaneously through the valve group and pump motor assembly on the normal working side.

[0005] The present application provides a coal mining machine dual pump station height adjustment oil circuit system, including a first valve group, a second valve group and an oil circuit channel, the first valve group is connected to the first height adjustment cylinder, the second valve group is connected to the second height adjustment cylinder, the first valve group is connected to the second height adjustment cylinder through the oil circuit channel, and the second valve group is connected to the first height adjustment cylinder through the oil circuit channel.

[0006] Preferably, the oil passage includes two or more passages, the first valve group and the second valve group include two or more connecting ports respectively, and the oil passage connects the first valve group and the second valve group through the connecting ports.

[0007] Preferably, the coal mining machine dual pump station height adjustment oil circuit system also includes a three-way joint located on the oil circuit channel, the first end of the three-way joint is connected to any connection port of the first valve group, the second end of the three-way joint is connected to any connection port of the second valve group, and the third end of the three-way joint is connected to the first height adjustment cylinder or the second height adjustment cylinder.

[0008] Preferably, it also includes a stop valve located on the oil passage, which is used to control the on and off of the oil passage.

[0009] Preferably, the stop valve comprises a first stop valve and a second stop valve, the first stop valve is connected to the first end of the three-way joint, and the second stop valve is located at the second end of the three-way joint.

[0010] Preferably, when the second valve group is in a normal working state, the first stop valve is in an open state and the second stop valve is in a closed state; when the second valve group fails, the first stop valve is in a closed state and the second stop valve is in an open state.

[0011] Preferably, the oil circuit channel includes a first channel and a second channel, the first valve group includes a first connecting port and a second connecting port, the second valve group includes a seventh connecting port and an eighth connecting port, on the first channel, the first connecting port is connected to the first height adjustment cylinder and the seventh connecting port at the same time through a three-way joint, on the second channel, the second connecting port is connected to the first height adjustment cylinder and the eighth connecting port at the same time through a three-way joint, the first stop valve is located on the passage from the first connecting port or the second connecting port to the three-way joint, and the second stop valve is located on the passage from the three-way joint to the seventh connecting port and the eighth connecting port.

[0012] Preferably, the oil circuit channel also includes a third channel and a fourth channel, the first valve group also includes a third connecting port and a fourth connecting port, the second valve group includes a fifth connecting port and a sixth connecting port, on the third channel, the third connecting port is connected to the fifth connecting port and the second height-adjusting cylinder through a three-way interface, on the fourth channel, the fourth connecting port is connected to the sixth connecting port and the second height-adjusting cylinder through a three-way interface, the first stop valve is located on the passage from the fifth connecting port or the sixth connecting port to the three-way joint, and the second stop valve is located on the passage from the three-way joint to the third connecting port and the fourth connecting port.

[0013] To summarize, the oil circuit channel utilized in the present application enables a connection relationship between any valve group and any height adjustment cylinder, and utilizes a shut-off valve to control the on / off of the channel, so that when any pump-motor assembly or any valve group fails, the valve group and pump-motor assembly on the normal working side can simultaneously control the actions of the two height adjustment cylinders, thereby achieving a "one-to-two" effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The structural diagram of the coal mining machine double pump station height adjustment oil circuit system of the present application is shown.

[0015] Component number description

[0016] 100-Coal mining machine double pump station height adjustment oil 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 channel

[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-Stop valve

[0041] 71-First stop valve

[0042] 72-Second stop valve

[0043] P-Tee Connector DETAILED DESCRIPTION

[0044] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0045] See also Figure 1. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0046] like Figure 1 As shown, the coal mining machine double pump station height adjustment oil circuit system 100 includes a first valve group 1, a second valve group 2, a pump motor assembly 3, and an oil circuit channel 4. Among them, 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 pass the oil from the oil pool 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 rod movement of the piston of the first height adjustment cylinder 61 or the second height adjustment cylinder 62 to realize the lifting 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, etc. How to configure the quantity and connection relationship of these tools is a conventional technical means 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 is provided with a first connection port 11, a second connection port 12, a third connection port 13 and a fourth connection port 14, and correspondingly, the second valve group 2 is provided with a fifth connection port 21, a sixth connection port 22, a seventh connection port 23 and an eighth connection port 24. Among them, the first connection port 11 is connected to the seventh connection port 23 through the first passage 41, the second connection port 12 is connected to the eighth connection port 24 through the second passage 42, the third connection port 13 is connected to the fifth connection port 21 through the third passage 43, and the fourth connection port 14 is connected to the sixth connection port 22 through the fourth passage 44. At the same time, the first connection port 11 is also connected to the first oil inlet 611 of the first height adjustment oil cylinder 61, the second connection port 12 is also connected to the first oil outlet 612, the fifth connection port 21 is also connected to the second oil inlet 621 of the second height adjustment oil cylinder 62, and the sixth connection port 22 is also connected to the second oil outlet 622 of the second height adjustment oil cylinder 62.

[0049] In one embodiment, a three-way joint P is further included on the oil passage 4. Taking the first passage 41 as an example, the first end of the three-way joint 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, which simplifies the passage structure at the first connection port 11. Similarly, a three-way joint is respectively provided on the second passage 42, the third passage 43 and the fourth passage 44, the first end of the three-way joint 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 further includes a stop valve 7 located on the oil circuit channel 4 to control the on-off of the oil circuit channel 4. Specifically, a first stop valve 71 and a second stop valve 72 are provided on the first channel 41, the first stop valve 71 is located between the first connecting port 11 and the first oil inlet 611, and the second stop valve 72 is located between the first connecting port 11 and the seventh connecting port 23. Similarly, a first stop valve 71 is provided between the second connecting port 12 and the first oil outlet 612, and a second stop valve 72 is provided between the second connecting port 12 and the eighth connecting port 24 on the second channel 42.

[0051] Similarly, on the third channel 43, a first stop valve 71 is set between the fifth connecting port 21 and the second oil inlet 621, and between the sixth connecting port 22 and the second oil outlet 622, and a second stop valve 72 is set between the fifth connecting port 21 and the third connecting port 13, and between the sixth connecting port 22 and the fourth connecting port 14.

[0052] Preferably, the stop valve is a high-pressure spherical stop valve.

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

[0054] The on-off setting of the oil passage 4 is described by taking the first valve group 1 as an example. In the normal working state, the first stop valve 71 is in the open state, the first connection port 11 is unobstructed with the first oil inlet 611, and the second connection port 12 is unobstructed with the first oil outlet 612; the second stop valve 72 is in the closed state, the first connection port 11 is in the closed state with the seventh connection port 23, and the second connection port 12 is in the closed state with the eighth connection port 24, that is, the first valve group 1 controls the first height adjustment cylinder 61. Similarly, by controlling the on-off of the first stop valve and the second stop valve, the effect of the second valve group controlling the second height adjustment cylinder 62 is achieved.

[0055] When any pump motor assembly 3 or any valve group fails, the first height adjustment cylinder 61 or the second height adjustment cylinder 62 is controlled by another pump motor assembly 3 by controlling the on and off of the stop valve 7. Specifically, if the pump motor assembly 3 connected to the first valve group 1 fails, the first stop 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 stop 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, the first stop 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 first height adjustment cylinder 61 and the second height adjustment cylinder 62 are controlled by the second valve group 2 at the same time. Close the first stop valve on the faulty side to prevent the oil from flowing back to the oil pool on the faulty side through the valve group on the faulty side, open the first stop valve on the normal working side and the second stop valve in the oil passage, and the pump motor assembly on the normal working side controls the oil cylinder on the faulty side.

[0056] The present application utilizes the idle third connection port 13 and the fourth connection port 14, the seventh connection port 23 and the eighth connection port 24 to form an oil circuit channel 4, so that any valve group and any height adjustment cylinder are connected, and the shut-off valve is used to control the on-off of the channel, so that when any pump-motor assembly or any valve group fails, the valve group and pump-motor assembly on the normal working side can simultaneously control the actions of the two height adjustment cylinders, thereby achieving a "one-to-two" effect.

[0057] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A coal mining machine double pump station height adjustment oil circuit system, 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-adjusting oil cylinder, the second valve group is connected to a second height-adjusting oil cylinder, the first valve group is connected to the second height-adjusting oil cylinder through the oil passage, and the second valve group is connected to the first height-adjusting oil cylinder through the oil passage.

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

3. The coal mining machine double pump station height adjustment oil circuit system according to claim 2, characterized in that: It also includes a stop valve located on the oil passage, which is used to control the on and off of the oil passage.

4. The coal mining machine double pump station height adjustment oil circuit system as claimed in claim 3, characterized in that: The stop valve comprises a first stop valve and a second stop valve, wherein the first stop valve is connected to a first end of the three-way joint, and the second stop valve is located at a second end of the three-way joint.

5. The coal mining machine double pump station height adjustment oil circuit system as claimed in claim 4, characterized in that: When the second valve group is in a normal working state, the first stop valve is in an open state and the second stop valve is in a closed state; when the second valve group fails, the first stop valve is in a closed state and the second stop valve is in an open state.

6. The coal mining machine double pump station height adjustment oil circuit system as claimed in claim 4, characterized in that: The oil passage includes two or more passages, the first valve group and the second valve group respectively include two or more connecting ports, and the oil passage connects the first valve group and the second valve group through the connecting ports.

7. The coal mining machine double pump station height adjustment oil circuit system according to claim 6, characterized in that: The oil circuit channel 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 the first height adjustment cylinder and the seventh connection port at the same time through the three-way joint, on the second channel, the second connection port is connected to the first height adjustment cylinder and the eighth connection port at the same time through the three-way joint, the first stop valve is located on the passage from the first connection port or the second connection port to the three-way joint, and the second stop valve is located on the passage from the three-way joint to the seventh connection port and the eighth connection port.

8. The coal mining machine double pump station height adjustment oil circuit system according to claim 7, characterized in that: The oil circuit channel also includes a third channel and a fourth channel, the first valve group also includes a third connecting port and a fourth connecting port, the second valve group includes a fifth connecting port and a sixth connecting port, on the third channel, the third connecting port is connected to the fifth connecting port and the second height adjustment cylinder through the three-way interface, and on the fourth channel, the fourth connecting port is connected to the sixth connecting port and the second height adjustment cylinder through the three-way interface, the first stop valve is located on the passage from the fifth connecting port or the sixth connecting port to the three-way joint, and the second stop valve is located on the passage from the three-way joint to the third connecting port and the fourth connecting port.

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