Centralized supply type lubricating unit and hydraulic system for coal mining machine

Abstract

The invention relates to the technical field of coal mining machine lubrication, in particular to a centralized supply type lubrication unit for a coal mining machine and a hydraulic system. The lubricating unit comprises a storage container used for containing lubricating grease; the distributor is provided with an input pipeline and a plurality of output pipelines communicated with the input pipeline; an inlet of the injection pump is communicated with the storage container, and an outlet of the injection pump is communicated with the distributor; the input end of the driving part is communicated with a hydraulic system of the coal mining machine and is powered by liquid pressure, and the output end of the driving part drives the injection pump to operate; the seat body is provided with a first channel and a second channel; the storage container and the distributor are arranged outside the seat body and are respectively communicated with two ends of the first channel; the injection pump and the driving part are arranged in the seat body, the injection pump is connected to the first channel in series, and the driving part is connected to the second channel in series. All parts of the coal mining machine can be lubricated in place, and the lubricating workload is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of coal mining machine lubrication, and in particular to a centralized supply lubrication unit and a hydraulic system for a coal mining machine. Background Art

[0002] At present, the lubrication work of traditional coal mining machines is carried out during the maintenance process of the coal mining machines. And when lubricating, manual lubrication is mostly used. Specifically, lubricating oil or grease is manually added to the corresponding parts that need lubrication using an oil gun. In the actual lubrication process, due to the harsh conditions in the mine, not only is it inconvenient to refuel, but the grease is also easily contaminated, which causes more serious wear of the lubricated parts, shortens their service life, and thus increases the maintenance cost of the coal mining machine. In addition, there are many parts in the coal mining machine that need to be lubricated, resulting in a large workload and inconvenient operation of manual lubrication operations, which are prone to problems such as inadequate lubrication, serious waste of grease, and time-consuming and labor-intensive operations. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention proposes a centralized supply lubrication unit and hydraulic system for a coal mining machine to solve the problem that the existing coal mining machine lubrication operation is prone to inadequate lubrication, waste of grease, and even aggravated wear of the lubricated parts.

[0004] In a first aspect, the present invention provides a centralized supply lubrication unit for a coal mining machine, the lubrication unit comprising: Storage container for grease; A distributor, provided with an input pipeline and a plurality of output pipelines connected to the input pipeline; a syringe pump, the inlet of which is connected to the storage container, and the outlet of which is connected to the dispenser; A driving member, the input end of which is connected to the hydraulic system of the coal mining machine and is powered by liquid pressure, and the output end of which drives the injection pump to operate; Wherein, it also includes a seat body provided with a first channel and a second channel; The storage container and the dispenser are arranged outside the base and are respectively connected to the two ends of the first channel; the injection pump and the drive member are arranged inside the base, the injection pump is connected in series to the first channel, and the drive member is connected in series to the second channel.

[0005] According to a centralized supply lubrication unit for a coal mining machine provided by the present invention, the two injection pumps and the driving member are integrated in the middle of the seat body; the two first channels are symmetrically arranged on the seat body, and form a storage container interface and a grease seat body outlet at the top of the seat body respectively; The storage container interface is located inside the grease seat outlet, and the injection pump is located directly below the storage container interface.

[0006] According to a centralized supply lubrication unit for a coal mining machine provided by the present invention, a function monitoring window communicating with the second channel is provided in the middle of the seat body for embedding the driving member; The second channel is separated from the function monitoring window and extends to the top of the seat body to form a liquid injection branch and a liquid outlet branch for circulating hydraulic oil.

[0007] According to a centralized supply lubrication unit for a coal mining machine provided by the present invention, throttling holes are arranged in series in the injection branch for buffering impact.

[0008] According to a centralized supply lubrication unit for a coal mining machine provided by the present invention, the storage container is installed on the storage container interface and extends upwardly above the seat body, and the input pipeline of the distributor is connected to the outlet of the grease seat body.

[0009] According to a centralized supply lubrication unit for a coal mining machine provided by the present invention, the seat body is provided with an observation port extending from the side wall thereof to the first channel for confirming the remaining amount of grease.

[0010] According to a centralized supply lubrication unit for a coal mining machine provided by the present invention, the height of the observation port is located between the injection pump and the storage container.

[0011] According to a centralized supply lubrication unit for a coal mining machine provided by the present invention, the seat body is provided with an overflow circuit for maintaining the internal pressure of the system, one end of the overflow circuit is connected in parallel to the middle of the first channel, and the other end of the overflow circuit extends through to the outside of the seat body, and an overflow valve is arranged in series in the overflow circuit.

[0012] According to a centralized supply lubrication unit for a coal mining machine provided by the present invention, a one-way valve is provided in the first channel, and the one-way valve is arranged in series at the upstream end of the connection point between the overflow circuit and the first channel.

[0013] In a second aspect, the present invention further provides a hydraulic system for a coal mining machine, comprising: an oil replenishment circuit and a reversing valve for controlling the on-off of the oil replenishment circuit; The centralized lubrication unit described in any one of the above items is connected to the reversing valve, and the reversing valve can be controlled to connect the oil replenishment circuit with the centralized lubrication unit.

[0014] The above one or more technical solutions in the present invention have at least one of the following technical effects: Automatic centralized lubrication of the coal mining machine is achieved through the lubrication unit, avoiding the omission and waste of manual lubrication. In addition, the power source adopts the hydraulic system of the coal mining machine, which has a simple structure and is easy to maintain, ensuring the lubrication effect and reducing the labor intensity of workers.

[0015] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted, and the advantages brought about by the technical features of these technical solutions described above, other technical features of the present invention and the advantages brought about by these technical features will be further explained in conjunction with the accompanying drawings or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of a centralized supply lubrication unit for a coal mining machine provided in an embodiment of the present invention.

[0018] Figure 2 A schematic front view of a seat body in a centralized supply lubrication unit provided in an embodiment of the present invention.

[0019] Figure 3 A schematic top view of a seat body in a centralized supply lubrication unit provided in an embodiment of the present invention.

[0020] Figure 4 A schematic diagram of a hydraulic system provided in an embodiment of the present invention.

[0021] Reference numerals: 1. Hydraulic system; 11. Reversing valve; 2. Oil replenishment circuit; 3. Centralized supply lubrication unit; 310. Storage container; 320. Distributor; 321. Input pipeline; 322. Output pipeline; 330. Injection pump; 340. Drive member; 350. Seat; 360. First channel; 361. Storage container interface; 362. Grease seat outlet; 363. One-way valve; 364. Overflow circuit; 365. Overflow valve; 370. Second channel; 371. Liquid injection branch; 372. Throttle hole; 373. Adjustable flow valve; 374. Liquid outlet branch; 375. Filter; 380. Function monitoring window; 390. Observation port. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it 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. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0025] In the embodiments of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0027] At present, the lubrication work of traditional coal mining machines is carried out during the maintenance process of the coal mining machines. And when lubricating, manual lubrication is mostly used. Specifically, lubricating oil or grease is manually added to the corresponding parts that need lubrication using an oil gun. In the actual lubrication process, due to the harsh conditions in the mine, not only is it inconvenient to refuel, but the grease is also easily contaminated, which causes more serious wear of the lubricated parts, shortens their service life, and thus increases the maintenance cost of the coal mining machine. In addition, there are many parts in the coal mining machine that need to be lubricated, resulting in a large workload and inconvenient operation of manual lubrication operations, which are prone to problems such as inadequate lubrication, serious waste of grease, and time-consuming and labor-intensive operations.

[0028] In order to solve the above problems, in the embodiment of the present invention, a centralized supply lubrication unit 3 for a coal mining machine is introduced. The lubrication unit mainly includes: a storage container 310 , a distributor 320 , an injection pump 330 and a driving member 340 .

[0029] Specifically, Figure 1 As shown, the storage container 310 is used to contain grease. The distributor 320 is provided with an input pipeline 321 and a plurality of output pipelines 322 connected to the input pipeline 321. The inlet of the injection pump 330 is connected to the storage container 310, and the outlet of the injection pump 330 is connected to the distributor 320. The input end of the driving member 340 is connected to the hydraulic system 1 of the coal mining machine, and the switching with the hydraulic system is controlled by the reversing valve to provide power. The output end of the driving member 340 drives the injection pump 330 to operate.

[0030] In particular, the lubrication unit is used to fix the seat 350 on which the storage container 310, the distributor 320, the injection pump 330 and the driving member 340 are mounted. The seat 350 is provided with a first channel 360 and a second channel 370. The storage container 310 and the distributor 320 are arranged outside the seat 350. Moreover, the storage container 310 and the distributor 320 are respectively connected to both ends of the first channel 360. The injection pump 330 and the driving member 340 are arranged inside the seat 350. The injection pump 330 is connected in series to the first channel 360. The driving member 340 is connected in series to the second channel 370.

[0031] Furthermore, the distributor 320 is configured as a progressive distributor with a progressive structure inside. The progressive distributor 320 has an input pipeline 321 and a plurality of output pipelines 322 connected to the input pipeline 321. Each output pipeline 322 is connected to a transmission component on the coal mining machine that needs to be lubricated, ensuring that each component can obtain an appropriate amount of lubricating grease.

[0032] In addition, the lubrication unit is also provided with an electric proportional control valve. The electric proportional control valve is provided with a timed switch electric control program, which starts the electric proportional switch valve switching at a timed time, so that the hydraulic oil is controlled to enter the driving part 340 to drive the injection pump 330 to discharge the grease, ensuring that each component is lubricated on time and in a quantitative manner.

[0033] In this embodiment, automatic centralized lubrication of the coal mining machine is achieved through the lubrication unit, avoiding the omission and waste of manual lubrication, and the power source adopts the hydraulic system 1 of the coal mining machine, which has a simple structure and is easy to maintain, ensuring the lubrication effect and reducing the labor intensity of workers.

[0034] On the basis of the above-mentioned embodiment, in another embodiment of the present invention, a seat body 350 is introduced which can simplify the pipeline structure of the lubrication unit and reduce the overall volume of the lubrication unit.

[0035] like Figure 2 and Figure 3 As shown, a structure for fixing the injection pump 330 and the driving member 340 is provided in the seat body 350. The two injection pumps 330 and the driving member 340 are integrated in the middle of the seat body 350.

[0036] The injection pump 330 and the driving member 340 are arranged inside the seat body 350. The injection pump 330 is connected in series to the first channel 360. The driving member 340 is connected in series to the second channel 370. The two first channels 360 are symmetrically arranged on the seat body 350, and a storage container interface 361 and a grease seat body outlet 362 are formed on the top of the seat body 350 respectively.

[0037] The storage container interface 361 is located inside the grease seat outlet 362 , and the injection pump 330 is located directly below the storage container interface 361 .

[0038] Preferably, the first channel 360 is extended at the top of the seat body 350 and parallel to the top surface of the seat body 350. The second channel 370 is extended at the bottom of the seat body 350 and parallel to the top surface of the seat body 350. Alternatively, the second channel 370 is extended in the middle of the seat body 350 and parallel to the side surface of the seat body 350.

[0039] In this embodiment, the injection pump 330 and the driving member 340 are integrated in the middle of the base body 350. One driving member 340 can drive two injection pumps 330 to reduce power components, and two distributors 320 can simultaneously supply lubricating oil to various components on the coal mining machine, thereby improving lubrication efficiency and enhancing the effect of use, which is suitable for popularization and use.

[0040] On the basis of the above-mentioned embodiment, in another embodiment of the present invention, a centralized supply lubrication unit 3 for a coal mining machine is introduced.

[0041] The middle of the seat body 350 is provided with a function monitoring window 380 connected to the second channel 370 for embedding the driving member 340. The second channel 370 is extended in the middle of the seat body 350 and parallel to the side of the seat body 350. The second channel 370 is separated from the function monitoring window 380 to form two branches extending from the function monitoring window 380 to the top of the seat body 350.

[0042] When the driving member 340 is embedded in the function monitoring window 380, two branches are connected from the top of the seat body 350 to the driving member 340 for circulating hydraulic oil. One branch delivers hydraulic oil to the driving member 340 to form a liquid injection branch 371, and the other delivers the liquid discharged from the driving member 340 back to the hydraulic system 1 to form a liquid outlet branch 374.

[0043] Furthermore, a throttle hole 372 is provided in series in the injection branch 371 to buffer the impact. In addition, an adjustable flow valve 373 is provided in series in the injection branch 371. The adjustable flow valve 373 can adjust the pressure and flow rate of the liquid in the injection branch 371 by changing its aperture size.

[0044] On the basis of the above-mentioned embodiment, in another embodiment of the present invention, a centralized supply lubrication unit 3 for a coal mining machine is introduced.

[0045] The storage container 310 is mounted on the storage container interface 361. In addition, the storage container 310 extends upward and is higher than the seat body 350. The input pipeline 321 of the distributor 320 is connected to the grease seat body outlet 362.

[0046] The distributor 320 is configured as a progressive distributor 320 having a progressive structure inside. The progressive distributor 320 has an input pipeline 321 and a plurality of output pipelines 322 connected to the input pipeline 321. Each output pipeline 322 is connected to a transmission component to be lubricated on the coal mining machine, ensuring that each component can obtain an appropriate amount of lubricating grease.

[0047] On the basis of the above-mentioned embodiment, in another embodiment of the present invention, a centralized supply lubrication unit 3 for a coal mining machine is introduced.

[0048] The seat body 350 is provided with an observation port 390 extending from the side wall thereof to the first passage 360 ​​for checking the remaining amount of grease.

[0049] Further, the viewing port 390 is located at a height between the syringe pump 330 and the storage container 310 .

[0050] In this embodiment, by opening an observation port 390 on the seat body 350, the staff can confirm the remaining grease in the storage container 310 only through the observation port 390, without having to operate the storage container 310 to replenish the grease in the storage container 310 in time.

[0051] On the basis of the above-mentioned embodiment, in another embodiment of the present invention, a centralized supply lubrication unit 3 for a coal mining machine is introduced.

[0052] like Figure 1 As shown, the seat body 350 is provided with an overflow circuit 364 for maintaining the internal pressure of the system. One end of the overflow circuit 364 is connected in parallel to the middle of the first channel 360. The other end of the overflow circuit 364 extends through the outside of the seat body 350. An overflow valve 365 is provided in series in the overflow circuit 364, so that when the pipeline in the lubrication unit is blocked or the grease in the lubricated part is filled, the overflow valve 365 automatically discharges the excess grease to protect the pipeline or passage in the lubrication unit.

[0053] Furthermore, a one-way valve 363 is provided in the first channel 360. The one-way valve 363 is arranged in series at the upstream end of the connection point between the overflow circuit 364 and the first channel 360, so that the grease can only flow from the injection pump 330 to the distributor 320 or the overflow valve 365 in one direction, thereby preventing the contaminated grease from flowing back to the injection pump 330, affecting the operation of the injection pump 330 and causing damage thereto.

[0054] On the other hand, in another embodiment of the present invention, a hydraulic system 1 for a coal mining machine is introduced.

[0055] like Figure 4As shown, the hydraulic system 1 comprises: an oil replenishment circuit 2, a reversing valve 11 and a centralized lubrication unit 3 in any of the above embodiments. The centralized lubrication unit 3 adjusts the on-off state with the oil replenishment circuit 2 through the reversing valve 11.

[0056] The control valve is set to a three-position five-way structure. The position states of the control valve are arranged from left to right. When the control valve is in the first position, the A port of the control valve is connected to the P port, and the B port is connected to the T port; when the control valve is in the second position, the A port of the control valve is connected to the B port, the P port is closed, and the T port is connected to the B port; when the control valve is in the third position, the A port of the control valve is connected to the T port, and the B port is connected to the P port.

[0057] In addition, the hydraulic system 1 also includes components such as an oil tank, a filter 375 and a hydraulic pump. The reversing valve 11 is used to control the oil replenishment circuit 2 to be connected with the hydraulic system 1 or the centralized supply lubrication unit 3, so as to circulate and supply the hydraulic oil.

[0058] For example, when the hydraulic system 1 of the coal mining machine is in operation, the control reversing valve 11 is switched to the third position, and the centralized lubrication system starts to operate. At this time, the P port of the control reversing valve 11 is connected to the B port, and the A port is connected to the T port.

[0059] The hydraulic oil flows to the injection branch 371 of the centralized supply lubrication unit 3 through the B port of the reversing valve 11, and passes through the filter 375, the throttle hole 372, and the adjustable throttle valve 373 in the seat body 350 in sequence, and finally flows to the driving member 340. The driving member 340 can be set as a micro hydraulic motor, which is driven by the hydraulic system to operate, and the return oil of the micro hydraulic motor directly returns to the hydraulic system tank through the R port of the liquid outlet branch 374.

[0060] Furthermore, the driving member 340 is in transmission connection with the injection pump 330, and can drive the injection pump 330 to operate. When the injection pump 330 operates, the grease in the storage container can be sucked into the distributor 320, and the grease is delivered to each lubricated component in the coal mining machine through the distributor 320.

[0061] At the same time, an overflow circuit 364 is also provided in the seat body 350 in parallel with the distributor 320. An overflow valve 365 is connected in series in the overflow circuit 364. A check valve 363 is provided in the first channel 360 of the seat body 350. The check valve 363 is connected in series at the upstream end of the connection point between the overflow circuit 364 and the first channel 360, so that the grease can only flow from the injection pump 330 to the distributor 320 or the overflow valve 365 in one direction. When the pipeline in the lubrication unit is blocked or the grease in the lubricated part is filled, the overflow valve 365 automatically discharges the excess grease to protect the pipeline or passage in the lubrication unit.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A centralized supply lubrication unit for a coal mining machine, characterized in that: include: A storage container (310) for containing grease; A distributor (320) is provided with an input pipeline (321) and a plurality of output pipelines (322) connected to the input pipeline (321); A syringe pump (330), the inlet of which is connected to the storage container (310), and the outlet of which is connected to the distributor (320); A driving member (340), whose input end is connected to the hydraulic system (1) of the coal mining machine and is powered by liquid pressure, and whose output end drives the injection pump (330) to operate; It also includes a seat body (350) provided with a first channel (360) and a second channel (370); The storage container (310) and the distributor (320) are arranged outside the base (350) and are respectively connected to both ends of the first channel (360); the injection pump (330) and the driving member (340) are arranged inside the base (350), the injection pump (330) is connected in series to the first channel (360), and the driving member (340) is connected in series to the second channel (370).

2. The centralized supply lubrication unit for coal mining machine according to claim 1, characterized in that: The two injection pumps (330) and the driving member (340) are integrated in the middle of the seat body (350); the two first channels (360) are symmetrically arranged on the seat body (350), and form a storage container interface (361) and a grease seat body outlet (362) at the top of the seat body (350); The storage container interface (361) is located inside the grease seat outlet (362), and the injection pump (330) is located directly below the storage container interface (361).

3. The centralized supply lubrication unit for coal mining machine according to claim 1 or 2, characterized in that: A function monitoring window (380) communicating with the second channel (370) is provided in the middle of the seat body (350) and is used for embedding the driving member (340); The second channel (370) is separated from the function monitoring window (380) and extends to the top of the seat body (350) to form a liquid injection branch (371) and a liquid outlet branch (374) for circulating hydraulic oil.

4. The centralized supply lubrication unit for coal mining machine according to claim 3, characterized in that: A throttling hole (372) is arranged in series in the injection branch (371) for buffering impact.

5. The centralized supply lubrication unit for coal mining machine according to claim 2, characterized in that: The storage container (310) is mounted on the storage container interface (361) and extends upward to be higher than the seat body (350). The input pipeline (321) of the distributor (320) is connected to the grease seat body outlet (362).

6. The centralized supply lubrication unit for coal mining machine according to claim 5, characterized in that: The seat body (350) is provided with an observation port (390) extending from a side wall thereof to the first channel (360) for confirming the remaining amount of lubricating grease.

7. The centralized supply lubrication unit for coal mining machine according to claim 6, characterized in that: The observation port (390) is located at a height between the injection pump (330) and the storage container (310).

8. The centralized supply lubrication unit for coal mining machine according to claim 1 or 2, characterized in that: The seat body (350) is provided with an overflow circuit (364) for maintaining the internal pressure of the system; one end of the overflow circuit (364) is connected in parallel to the middle of the first channel (360); the other end of the overflow circuit (364) extends through the outside of the seat body (350); and an overflow valve (365) is provided in series in the overflow circuit (364).

9. The centralized supply lubrication unit for coal mining machine according to claim 8, characterized in that: A one-way valve (363) is provided in the first channel (360), and the one-way valve (363) is arranged in series at the upstream end of the connection point between the overflow circuit (364) and the first channel (360).

10. A hydraulic system for a coal mining machine, characterized in that: include: An oil replenishment circuit (2) and a reversing valve (11) for controlling the on / off state of the oil replenishment circuit (2); The centralized lubrication unit (3) according to any one of claims 1 to 9 is connected to the reversing valve (11), and the reversing valve (11) can be controlled to connect the oil replenishment circuit (2) with the centralized lubrication unit (3).

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