Hydraulic pump station suitable for large gradient and heading machine

Abstract

The hydraulic pump station arranged above the heading machine comprises an oil pump motor, a transfer case, a duplex plunger pump and an oil tank assembly in sequence from back to front, and the oil tank assembly comprises a special-shaped oil cavity at the front end and a box-shaped oil suction cavity extending backwards. The box-shaped oil suction cavity is located under the duplex plunger pump and connected with the duplex plunger pump through a plurality of oil suction pipes, and the box-shaped oil suction cavity further extends into the special-shaped oil cavity to form a lengthened plate. On the basis that the structural part of the heading machine is changed in a small range, two plunger pumps are connected in parallel through a transfer case, the power of an oil pump motor is distributed in a 1: 1 mode, the working efficiency is improved, one end of an oil tank assembly extends to form a box-shaped oil suction cavity, and the volume of an oil tank is increased through the structural design of a special-shaped oil cavity. The extended lengthening plate ensures that the oil pump can suck oil smoothly all the time in the large-angle excavation process of the heading machine, the overall design is compact, and the practicability is very high.

Description

Technical Field

[0001] The utility model relates to the technical field of mining machinery manufacturing, in particular to a hydraulic pump station and a tunneling machine suitable for large slopes. Background Art

[0002] With the continuous advancement of current coal mining technology, large slopes in coal mine tunnels are becoming more and more common during coal mining. During the mining process, the roadheader often has difficulty in absorbing oil due to the large slope, which causes damage to the hydraulic system and even affects the mining progress of the unit. To cope with such working conditions, the solution is mainly to change the layout of the pump station of the roadheader.

[0003] Usually, the pump station design of a tunnel boring machine is mainly composed of an oil pump motor assembly and an oil tank. The oil pump motor assembly includes an oil pump motor, a coupling, a flange and a plunger pump connected in sequence. The oil pump motor assembly and the oil tank are generally arranged in a straight line on the body of the tunnel boring machine. One end of the oil suction pipe is connected to the cavity wall of the oil tank cavity close to the side of the oil pump motor assembly, and the other end of the oil suction pipe is connected to the plunger pump. This arrangement of the oil pump motor assembly and the oil tank causes the oil pump motor to tilt forward when the tunnel boring machine is working downhill, causing the liquid in the oil tank to tilt forward. The plunger pump on the machine assembly cannot absorb liquid, and reversing the order of the pump station and the oil tank will also cause the oil pump to suck empty during the uphill process of the tunnel boring machine. The utility model patent with the publication number CN215908138U provides a hydraulic pump station and a tunnel boring machine. The oil tank assembly sets the oil suction filter at the center position near the bottom of the inner cavity, so that the oil suction filter will not be exposed to the liquid surface whether the tunnel boring machine is going uphill or downhill, so as to avoid the oil pump motor assembly connected to the oil suction filter from sucking empty when the tunnel boring machine is going uphill or downhill. However, the application of this technology requires a lot of modifications to the tunnel boring machine structure. If modifications are made to the unit in use, the operation is very difficult and basically impossible to achieve. Utility Model Content

[0004] To this end, the technical problem to be solved by the utility model is to overcome the lack of a reasonable pump station design in the prior art that can solve the oil suction difficulty encountered by the tunnel boring machine during the large slope mining process based on a small range of changes to the tunnel boring machine structural parts.

[0005] In order to solve the above technical problems, the utility model provides a hydraulic pump station suitable for large slopes, comprising:

[0006] An oil tank assembly, comprising a special-shaped oil cavity, a box-shaped oil suction cavity is arranged on one side of the special-shaped oil cavity, the box-shaped oil suction cavity is connected to the special-shaped oil cavity, the bottom surface of the box-shaped oil suction cavity and the bottom surface of the special-shaped oil cavity are in the same horizontal plane, the height of the special-shaped oil cavity is greater than the height of the box-shaped oil suction cavity, the box-shaped oil suction cavity extends to the special-shaped oil cavity with an extension plate, and the extension plate crosses the entire width of the special-shaped oil cavity;

[0007] An oil pump motor is arranged on a side of the oil tank assembly close to the box-shaped oil suction cavity, and the oil pump motor includes a first output shaft;

[0008] A transfer case, comprising an input shaft on one side and a second output shaft and a distribution shaft on the other side, wherein the input shaft and the second output shaft are rigidly connected, a first gear is further provided between the input shaft and the second output shaft, a second gear is provided at the front end of the distribution shaft, the second gear has the same structure as the first gear, and the second gear meshes with the first gear, and the input shaft is connected to the first output shaft;

[0009] Two plunger pumps are arranged above the box-shaped oil suction chamber and are respectively connected to the second output shaft and the distribution shaft. The plunger pump is provided with a plurality of oil suction pipes, and the oil suction pipes are communicated with the box-shaped oil suction chamber.

[0010] In one embodiment of the utility model, a flexible joint is provided between the oil suction pipe and the box-shaped oil suction chamber.

[0011] In one embodiment of the utility model, a vacuum butterfly valve is provided on the oil suction pipe.

[0012] In one embodiment of the utility model, a plurality of oil suction filters are arranged in the box-shaped oil suction chamber, and the oil suction pipe is connected to the oil suction filters.

[0013] In one embodiment of the utility model, it also includes a tunnel boring machine accessory support frame, and the oil pump motor is mounted on the tunnel boring machine accessory support frame.

[0014] The utility model also provides a tunneling machine suitable for large slopes, comprising the hydraulic pump station suitable for large slopes as described above.

[0015] The above technical solution of the utility model has the following advantages compared with the prior art:

[0016] The hydraulic pump station and tunnel boring machine suitable for large slopes described in the utility model do not modify the tunnel boring machine structural parts to a large extent, but only change the layout of the hydraulic pump station and the oil tank assembly, abandon the common form of using a coupling and a flange connection between the plunger pump and the oil pump motor, and use a transfer case instead to connect the two plunger pumps in parallel and distribute the oil pump motor power in a 1:1 ratio, which not only increases the working efficiency, but also can extend one end of the oil tank assembly to form a box-shaped oil suction chamber without changing the overall length of the pump station, and the plunger pump is arranged above the box-shaped oil suction chamber. In addition, the structural design of the special-shaped oil chamber itself greatly improves the overall volume of the oil tank, and at the same time, the box-shaped oil suction chamber extends an extension plate into the special-shaped oil chamber to ensure that the oil pump can always suck oil smoothly during the tunnel boring machine's large-angle mining process. The overall design is very compact, and can be used not only in the design of new models but also in the low-cost transformation of old models, and is very practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0018] Figure 1 This is a schematic diagram of the overall structure of the hydraulic pump station suitable for large slopes of the utility model;

[0019] Figure 2 for Figure 1 The front view of the plunger pump and the oil pump motor in the hydraulic pump station suitable for large slopes is shown;

[0020] Figure 3 for Figure 1 The top view of the plunger pump and the oil pump motor in the hydraulic pump station suitable for large slopes is shown;

[0021] Figure 4 for Figure 1 A front view of an oil tank assembly in a hydraulic pump station suitable for steep slopes is shown;

[0022] Figure 5 for Figure 1 A top view of an oil tank assembly in a hydraulic pump station suitable for steep slopes is shown;

[0023] Figure 6 The utility model is a schematic diagram of the overall structure of a tunnel boring machine suitable for large slopes.

[0024] Explanation of the reference numerals in the specification: 1. Oil tank assembly; 110. Special-shaped oil chamber; 120. Box-shaped oil suction chamber; 130. Extension plate; 2. Oil pump motor; 3. Transfer case; 4. Plunger pump; 5. Oil suction pipe; 6. Flexible joint; 7. Vacuum butterfly valve; 8. Tunneling accessory support frame; 9. Tunneling machine. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0026] Embodiment 1, refer to Figures 1 to 5 As shown, the utility model provides a hydraulic pump station suitable for large slopes, comprising:

[0027] The oil tank assembly 1 comprises a special-shaped oil chamber 110, a box-shaped oil suction chamber 120 is arranged on one side of the special-shaped oil chamber 110, the box-shaped oil suction chamber 120 is connected to the special-shaped oil chamber 110, the bottom surface of the box-shaped oil suction chamber 120 and the bottom surface of the special-shaped oil chamber 110 are in the same horizontal plane, the height of the special-shaped oil chamber 110 is greater than the height of the box-shaped oil suction chamber 120, and the box-shaped oil suction chamber 120 extends toward the special-shaped oil chamber 110 with an extension plate 130, and the extension plate 130 crosses the entire width of the special-shaped oil chamber 110;

[0028] The oil pump motor 2 is arranged on one side of the oil tank assembly 1 close to the box-shaped oil suction chamber 120, and the oil pump motor 2 includes a first output shaft;

[0029] The transfer case 3 includes an input shaft on one side and a second output shaft and a distribution shaft on the other side. The input shaft and the second output shaft are rigidly connected. A first gear is provided between the input shaft and the second output shaft. A second gear is provided at the front end of the distribution shaft. The second gear has the same structure as the first gear and is meshed with the first gear. The input shaft is connected to the first output shaft.

[0030] Two plunger pumps 4 are arranged above the box-shaped oil suction chamber and are respectively connected to the second output shaft and the distribution shaft. The plunger pump 4 is provided with a plurality of oil suction pipes 5 which are communicated with the box-shaped oil suction chamber.

[0031] Specifically, the entire special-shaped oil chamber 110 and the bottom surface of the box-shaped oil tank are a whole rectangular smooth plate, the front end of the rectangular smooth plate is welded by multiple rectangular plates to form a box-shaped oil suction chamber 120, the rear end of the rectangular smooth plate is made into a special-shaped structure and is also welded by multiple plates and the side is extended to form the special-shaped oil chamber 110, the side of the box-shaped oil suction chamber special-shaped oil chamber 110 close to the box-shaped oil suction chamber is extended inward by the top plate of the box-shaped oil suction chamber to form an extension plate 130, (Under the previous design, according to software analysis, if the extension plate 130 is not designed, when the entire oil tank assembly 1 is tilted more than 23°, the oil level will be lower than the right angle formed by the top plate of the box-shaped oil suction chamber 120 and the side plate of the special-shaped oil tank, resulting in the box-shaped oil suction chamber 120 entering air and eventually causing the plunger pump 4 to suck empty, at this time, it can be considered to lengthen the oil suction chamber, that is, welding the extension plate 130 at the right angle 30, the space of the oil suction chamber is enlarged, and an extension of 100mm can meet the oil pump to pump oil under a 27° downhill state. The length of the extension plate 130 needs to be designed according to the actual situation. Infinite extension of the extension plate 130 will cause changes in the internal space); the transfer case 3 is a commonly used form of dividing the output into two, the two plunger pumps 4 rotate synchronously and are arranged in parallel, the oil suction pipe 5 is a steel pipe, in this embodiment, four oil suction pipes 5 are designed, the inlet of the plunger pump 4 is arranged on the side, the two oil suction pipes 5 are a group of horizontally drawn out from the inlet of the plunger pump 4 and bent downward to be connected to the box-shaped oil suction chamber 120 through a flange, and four outlets are arranged on the corresponding box-shaped oil suction chamber 120; the entire pump station is composed of an oil pump motor 2, a transfer case 3, a double plunger pump 4 and an oil tank assembly 1 from back to front, and the box-shaped oil suction chamber 120 is located directly below the double plunger pump 4.

[0032] Furthermore, a flexible joint 6 is provided between the oil suction pipe 5 and the box-shaped oil suction chamber.

[0033] Specifically, during the assembly of the pump station, the downwardly bent portion of the end of the oil suction pipe 5 is connected to the box-shaped oil suction chamber using a flexible joint 6, which can effectively improve the earthquake resistance of the pump station and reduce or avoid damage to seals or hydraulic components caused by rigid connections.

[0034] Furthermore, a vacuum butterfly valve 7 is provided on the oil suction pipe 5 .

[0035] Specifically, the vacuum butterfly valve 7 is arranged between the flexible joint 6 and the box-shaped oil suction chamber 120, that is, the end of the oil suction pipe 5. The use of the vacuum butterfly valve 7 can make the opening and closing of the oil port of the oil suction pipe 5 adjustable. If the plunger pump 4 needs to be replaced during subsequent maintenance, the butterfly valve switch can be closed to avoid waste caused by the gushing of internal oil.

[0036] Furthermore, a plurality of oil suction filters are arranged in the box-shaped oil suction chamber, and the oil suction pipe 5 is connected to the oil suction filters.

[0037] Specifically, the oil suction filter ensures that the hydraulic oil can be cleanly filtered before entering the plunger pump 4 , thereby extending the service life of the plunger pump 4 .

[0038] Furthermore, it also includes a tunnel boring machine accessory support frame 8, and the oil pump motor 2 is mounted on the tunnel boring machine accessory support frame 8.

[0039] Specifically, the tunnel boring machine accessory support frame 8 is used to support the oil pump motor 2, ensuring that the plunger pump 4 can be erected directly above the box-shaped oil suction chamber and ensuring that there is enough connection space between the oil suction pipe 5 and the oil chamber.

[0040] Example 2, refer to Figure 6 As shown, the utility model also provides a tunnel boring machine 9 suitable for large slopes, including the hydraulic pump station suitable for large slopes as described above.

[0041] Specifically, four groups of load-sensitive multi-way valves are used in the hydraulic system of the entire tunnel boring machine. A single pump corresponds to a single group of valves to distinguish the various actions of the unit to prevent the phenomenon of "oil grabbing" between the various actions in the hydraulic system.

[0042] This hydraulic pump station and tunnel boring machine 9 suitable for large slopes, on the basis of not modifying the structural parts of the tunnel boring machine 9 to a large extent, only changes the layout of the hydraulic pump station and the oil tank assembly 1, abandons the common form of using a coupling and a flange connection between the plunger pump 4 and the oil pump motor 2, and uses a transfer case 3 instead, connects two plunger pumps 4 in parallel, and distributes the power of the oil pump motor 2 in a 1:1 ratio, which not only increases the working efficiency, but also in this form can extend one end of the oil tank assembly 1 to form a box-shaped oil suction chamber 120 without changing the overall length of the pump station, and the plunger pump 4 is arranged above the box-shaped oil suction chamber 120. In addition, the structural design of the special-shaped oil chamber 110 itself greatly improves the overall volume of the oil tank. At the same time, the box-shaped oil suction chamber 120 extends an extension plate 130 into the special-shaped oil chamber 110 to ensure that the oil pump of the tunnel boring machine 9 can always suck oil smoothly during large-angle mining. The overall design is very compact, which can be used not only in the design of new models but also in the low-cost transformation of old models, and is very practical.

[0043] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A hydraulic pump station suitable for large slopes, characterized in that: include: An oil tank assembly, comprising a special-shaped oil cavity, a box-shaped oil suction cavity is arranged on one side of the special-shaped oil cavity, the box-shaped oil suction cavity is connected to the special-shaped oil cavity, the bottom surface of the box-shaped oil suction cavity and the bottom surface of the special-shaped oil cavity are in the same horizontal plane, the height of the special-shaped oil cavity is greater than the height of the box-shaped oil suction cavity, the box-shaped oil suction cavity extends to the special-shaped oil cavity with an extension plate, and the extension plate crosses the entire width of the special-shaped oil cavity; An oil pump motor is arranged on a side of the oil tank assembly close to the box-shaped oil suction cavity, and the oil pump motor includes a first output shaft; A transfer case, comprising an input shaft on one side and a second output shaft and a distribution shaft on the other side, wherein the input shaft and the second output shaft are rigidly connected, a first gear is further provided between the input shaft and the second output shaft, a second gear is provided at the front end of the distribution shaft, the second gear has the same structure as the first gear, and the second gear meshes with the first gear, and the input shaft is connected to the first output shaft; Two plunger pumps are arranged above the box-shaped oil suction chamber and are respectively connected to the second output shaft and the distribution shaft. The plunger pump is provided with a plurality of oil suction pipes, and the oil suction pipes are communicated with the box-shaped oil suction chamber.

2. The hydraulic pump station suitable for large slopes according to claim 1, characterized in that: A flexible joint is arranged between the oil suction pipe and the box-shaped oil suction cavity.

3. The hydraulic pump station suitable for large slopes according to claim 1, characterized in that: The oil suction pipe is provided with a vacuum butterfly valve.

4. The hydraulic pump station suitable for large slopes according to claim 1, characterized in that: A plurality of oil suction filters are arranged in the box-shaped oil suction chamber, and the oil suction pipe is connected to the oil suction filters.

5. The hydraulic pump station suitable for large slopes according to claim 1, characterized in that: It also includes a tunnel boring machine accessory support frame, and the oil pump motor is mounted on the tunnel boring machine accessory support frame.

6. A tunnel boring machine suitable for large slopes, characterized in that: It comprises a hydraulic pump station suitable for large slopes as described in any one of claims 1 to 5.

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