Movable pump station

Abstract

The utility model provides a movable pump station, which comprises a driving device, a transfer case, a pump assembly and a chassis walking assembly, the transfer case is connected with the driving device, a main clutch is arranged in the transfer case, and the driving device selectively drives the pump assembly or the chassis walking assembly through the main clutch. According to the embodiment of the utility model, the pump assembly and the chassis walking assembly are selectively driven through the transfer case, multiple functions can be realized through the independent driving device, and the number of the driving devices is reduced, so that the overall size is smaller, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pump station, specifically, relate to a mobile pump station. BACKGROUND

[0002] Rock burst disaster is also called rock burst disaster, or coal burst in coal mine field, which refers to the balance state of ore body or rock mass under the action of internal high stress is destroyed, a large amount of energy is suddenly released, explosion vibration occurs, and the disaster caused by the sudden ejection of the ore body or rock mass on the wall of the well.

[0003] Hydraulic fracturing as an economic, safe and efficient rock burst prevention and control technology has been verified in some coal mines, and has become an effective means for rock burst control and hard and difficult roof control in coal mines. Numerous researches and tests show that high pressure water pre-splitting roof can directional fracturing roof rock, destroy the integrity of the roof rock, and further weaken the strength and integrity of the roof, so that the post-mining roof can be collapsed in time according to the demand, so as to reduce or basically eliminate rock burst and roof disaster.

[0004] Hydraulic fracturing needs to drill wellheads with a certain interval in the roof layer, and use fracturing pump and fracturing tool string to inject high pressure water into the wellhead, so as to cut the well wall or fracture the rock layer, so as to realize the splitting and crushing of large rock mass. However, the current fracturing pump is mostly skid structure, and it is very difficult to transfer the equipment between wellheads with an interval of several hundred meters or even several kilometers.

[0005] In addition, the current mobile skid type fracturing pump is mostly transported by underground train or scraper, and the underground roadway is very narrow. No matter which way is used, the transportation volume will be increased, and the transfer difficulty will be increased. INVENTION CONTENTS

[0006] Therefore, the utility model aims at providing a mobile pump station to solve the above technical problems in the prior art.

[0007] The utility model provides a mobile pump station, including drive arrangement, transfer case, pump assembly and chassis walking assembly, the transfer case is connected with the drive arrangement, the main clutch is arranged in the transfer case, the drive arrangement selectively drives the pump assembly or the chassis walking assembly through the main clutch.

[0008] In some embodiments, the transfer case includes a transfer case shell, a main input shaft and a main output shaft are arranged in the transfer case shell, the main input shaft is connected with the drive arrangement, and the main output shaft is connected with the pump assembly.

[0009] In some embodiments, the main input shaft is connected with the drive arrangement through a first coupling, and the main output shaft is connected with the pump assembly through a second coupling.

[0010] In some embodiments, a first gear is arranged on the main input shaft, and the main clutch selectively engages the first gear or the main output shaft.

[0011] In some embodiments, the main clutch comprises a dog clutch, and a shift fork is arranged on the dog clutch, and axial movement of the shift fork causes the dog clutch to engage the first gear or the main output shaft.

[0012] In some embodiments, at least one auxiliary output shaft is further arranged in the transfer case housing, and the auxiliary output shaft is connected with at least one oil pump, the first gear is connected with at least one oil pump gear, and the oil pump gear is arranged on the corresponding auxiliary output shaft.

[0013] In some embodiments, the oil pump at least comprises a chassis travel oil pump.

[0014] In some embodiments, the oil pump further comprises a lubricating oil pump and / or a heat dissipation oil pump.

[0015] In some embodiments, an oil suction pipe and an oil outlet pipe are further included, one end of the oil suction pipe extends into the bottom of the transfer case housing, and the other end of the oil suction pipe is connected with the oil pump, one end of the oil outlet pipe is connected with the oil pump, and the other end of the oil outlet pipe extends into the top of the transfer case housing.

[0016] In some embodiments, a speed change device is arranged in the transfer case, and the speed change device is connected with the pump assembly.

[0017] In some embodiments, the chassis travel assembly comprises a skid frame, a tracked chassis and a hydraulic motor, and the hydraulic motor is connected with the chassis travel oil pump.

[0018] In some embodiments, the control unit comprises a controller and a frequency converter, and the frequency converter controls the flow of the pump assembly and / or the travel speed of the chassis travel assembly by controlling the driving device.

[0019] The embodiments of the utility model drive the pump assembly and the chassis travel assembly selectively through the transfer case, can realize multiple functions through separate driving devices, reduce the number of driving devices, thereby make the overall volume smaller and reduce the cost.

[0020] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are taken as an example, and the detailed description is as follows in combination with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] In the drawings, which are not necessarily drawn to scale, like numerals describe similar components throughout the several views. Like numerals having letter suffixes can represent different instances of similar components. The drawings illustrate generally, by way of example, various embodiments discussed herein, and are not intended to limit the disclosure to the embodiments depicted. The same reference numerals in different drawings can identify the same or similar elements. Such embodiments are examples only, and are not intended to be limiting. The drawings are intended to provide a further understanding, but are not intended to provide an understanding or a description of every embodiment. In the drawings:

[0022] Figure 1 is a sectional view of the mobile pump station according to an embodiment of the present application;

[0023] Figure 2 is a schematic view of the arrangement in the mobile pump station according to an embodiment of the present application;

[0024] Figure 3 is a schematic view of the mobile pump station in a traveling state according to an embodiment of the present application;

[0025] Figure 4 is a schematic view of the mobile pump station in a fracturing state according to an embodiment of the present application;

[0026] Figure 5 is a schematic view of another embodiment of the mobile pump station according to an embodiment of the present application.

[0027] Reference numerals:

[0028] 1 - drive device; 2 - first coupling; 3 - transfer case; 4 - transfer case housing; 5 - main input shaft; 6 - lubricating oil; 7 - main output shaft; 8 - oil suction pipe; 9 - pump assembly; 10 - lubricating oil pump; 11 - chassis traveling oil pump; 12 - oil outlet pipe; 13 - third gear; 131 - second auxiliary output shaft; 14 - second gear; 141 - first auxiliary output shaft; 15 - radiator oil pump; 16 - first gear; 17 - second coupling; 20 - main clutch; 21 - shift fork; 30 - gear shifting device; 41 - fracturing pump; 42 - suction manifold; 43 - discharge manifold; 44 - pry frame; 45 - tracked chassis; 46 - hydraulic motor; 47 - controller; 48 - frequency converter; 49 - oil tank; 50 - radiator; 51 - operation table; 52 - foot pedal. DETAILED DESCRIPTION

[0029] The specific embodiments of the present application will now be described in detail with reference to the accompanying drawings.

[0030] It is to be understood that various alterations can be made to the embodiments disclosed herein. Thus, the above description is not to be construed as limiting, but merely as a basis for the claims.

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and, together with the general description of the application given above, and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0032] These and other characteristics of the present application will become apparent from the following description of the preferred forms thereof given, by way of non-limiting example only, with reference to the attached drawings.

[0033] It is also to be understood that, although a certain number of specific embodiments of the present application are described herein, many other modifications, alternate forms and equivalents can be implemented by persons skilled in the art having the benefit of this disclosure and these are therefore considered to fall within the scope of the present application as defined in the claims.

[0034] The above and other aspects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:

[0035] Specific embodiments of the present application are described hereinafter, with reference to the drawings; however, it will be understood that the disclosed embodiments are merely examples of the present application, which can be embodied in various forms. Well-known and / or redundant functions and structures are not described in detail to avoid obscuring the present application unnecessarily. Therefore, specific structural and functional details disclosed herein are not intended to limit the present application but merely to set a representative basis for the claims and for the general inventive concepts disclosed herein.

[0036] It is to be understood that the terms "first", "second", and the like used herein do not necessarily connote any order, quantity, composition or importance, but are used to distinguish one element from another, and are more especially used for the purpose of clarification. It is further understood that any terms used herein - including technical and scientific terms - have their ordinary meaning in the art unless otherwise defined. It is still further understood that any terms, including technical and scientific terms, are used herein in a nontoxic and non- hazardous manner and are intended to have the same meaning as commonly understood by those of ordinary skill in the art unless otherwise specifically defined.

[0037] The specification can use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which can refer to one or more embodiments according to the present application.

[0038] The embodiment of the present application provides a mobile pump station, as shown in the figure, which comprises a driving device 1, a transfer case 3, a pump assembly 9, a chassis walking assembly and a control unit. Figures 1-5 The mobile pump station can autonomously move to a specified position through the chassis walking assembly.

[0039] Specifically, the pump assembly 9 here can be a fracturing pump assembly, which comprises a fracturing pump 41 for converting low-pressure liquid into high-pressure liquid for fracturing. In addition, the pump assembly 9 further comprises a low-pressure suction manifold 42 and a high-pressure discharge manifold 43 connected with the fracturing pump, which are respectively connected with a liquid source and a fracturing tool to facilitate the delivery of fracturing fluid.

[0040] The chassis walking assembly here comprises a skid frame 44, a tracked chassis 45 and a hydraulic motor 46, wherein the skid frame 44 is used to carry various devices in the mobile pump station; the tracked chassis 45 is used to drive the movement of the mobile pump station, so that the overall length, width and height of the mobile pump station are relatively small, meeting the needs of driving underground; the hydraulic motor 46 can drive the tracked chassis to walk under the action of hydraulic oil, and in the embodiment, the hydraulic motor is connected with a chassis walking oil pump 11.

[0041] The driving device 1 here is used to output power, which can be a motor, for example; the transfer case 3 is connected with the driving device 1, for example, with the output shaft of the motor; the transfer case 3 here is used to selectively transmit the power output by the driving device 1 to the pump assembly 9 or the chassis walking assembly.

[0042] When the transfer case 3 transmits power to the pump assembly 9, it can drive the pump assembly 9 to perform fracturing operation; when the transfer case 3 transmits power to the chassis walking assembly, it can drive the chassis walking assembly to walk, facilitating the autonomous movement of the mobile pump station.

[0043] The control unit in the embodiment comprises a controller 47 and a frequency converter 48, which realizes the control of the speed or output torque of the motor, for example, through the frequency converter 48, thereby realizing the flow control of the pump assembly 9 and / or the walking speed control of the chassis walking assembly.

[0044] In addition, the mobile pump station further comprises an oil tank 49 and a radiator 50, wherein the oil tank 49 is connected with the lubricating oil pump 10, and the lubrication is realized through the above-mentioned device, the lubrication comprises power end lubrication and fluid end lubrication, wherein the power end lubrication can be that the motor realizes oil suction from the oil tank through the oil pump and the pipeline and lubricates each lubrication point of the crankshaft in the pump assembly 9; the fluid end lubrication is based on an external compression air source, and the lubrication of each plunger in the pump assembly 9 is realized through the air top oil bottle and the pipeline. In addition, the radiator 50 is connected with the radiator oil pump 15. In addition, the pry frame 44 is further provided with an operation table 51, a foot pedal 52 and the like.

[0045] Specifically, the transfer box 3 comprises a transfer box shell 4, and a main input shaft 5, a main output shaft 7 and at least one auxiliary output shaft are arranged in the transfer box shell 4, wherein the main input shaft 5 is connected with the driving device 1 through the first shaft coupling 2, for example, is connected with the output shaft of the motor, and the main output shaft 7 is connected with the pump assembly 9 through the second shaft coupling 17.

[0046] The driving device 1, the transfer box 3, the transmission shaft and the shaft coupling and the like in the embodiment form a power system, wherein the driving device 1 converts, for example, electrical energy into kinetic energy or hydraulic energy, and provides power for the pump assembly 9 or the chassis walking assembly through the transfer box 3, the transmission shaft and the like.

[0047] The transfer box 3 adopts a power take-off type transfer box, and is selected or switched through a gear shifting mechanism: when the main input shaft 5 is switched to be connected with the main output shaft 7, the pump assembly 9 is directly driven by the driving device 1, so that the driving device 1 only provides power for the pump assembly 9, so as to realize the fracturing operation; when the main input shaft 5 is switched to be disconnected with the main output shaft 7, the main input shaft 5 drives the auxiliary output shaft to rotate through the connecting gear, so as to provide power for at least the chassis walking oil pump 11, wherein the chassis walking oil pump 11 sucks oil from the oil tank through the pipeline and provides hydraulic oil with a predetermined pressure for the hydraulic motor of the chassis walking assembly, so as to realize the walking of the chassis walking assembly.

[0048] Specifically, the main input shaft 5 is provided with a first gear 16 and a main clutch 20, wherein the main clutch 20 can selectively engage the first gear 16 or the main output shaft 7. In an embodiment, the main clutch 20 comprises, for example, a jaw clutch, which is composed of two half clutches with teeth on the end faces, a first half clutch is fixed on the main input shaft 5, and a second half clutch is coupled with the main output shaft 7 through, for example, a guide key (or spline), and the first half clutch is axially moved by the operation mechanism shaft to realize the engagement.

[0049] To this end, the dog clutch is provided with a shift fork 21, and the first half clutch of the dog clutch is capable of moving axially under the push of the shift fork 21, so as to make the dog clutch engage with the first gear 16 or the main output shaft 7 (with the second half clutch on the main output shaft 7), and the first gear 16 here can be a dog gear matched with the dog clutch.

[0050] Further, the first gear 16 is connected with at least one oil pump gear, and the oil pump gear is arranged on the corresponding auxiliary output shaft, and each auxiliary output shaft is connected with a corresponding oil pump. Wherein, the first gear 16 can be sequentially connected with a plurality of oil pump gears, or can be connected with a plurality of oil pump gears respectively. The rotation of the first gear 16 drives the rotation of the oil pump gear, so as to provide power to the corresponding oil pump through the corresponding auxiliary output shaft, so as to drive the corresponding oil pump to work.

[0051] In the embodiment, the first gear 16 is sequentially connected with the second gear 14 and the third gear 13, wherein the first gear 16 is drivingly connected with the second gear 14, and the second gear 14 is drivingly connected with the third gear 13, and the second gear 14 is arranged on the first auxiliary output shaft 141, and the third gear 13 is arranged on the second auxiliary output shaft 14, and the first auxiliary output shaft 141 is connected with, for example, a lubricating oil pump 10, and the second auxiliary output shaft 14 is connected with, for example, a chassis traveling oil pump 11 and a heat dissipation oil pump 15, and the rotation of the first gear 16 drives the rotation of the second gear 14, so as to drive the lubricating oil pump 10 to work through the first auxiliary output shaft 141, and the second gear 14 can also drive the third gear 13 to rotate, so as to drive the chassis traveling oil pump 11 and / or the heat dissipation oil pump 15 to work through the second auxiliary output shaft 14.

[0052] In order to realize the circulation of the oil circuit in the mobile pump station, the mobile pump station further comprises an oil suction pipe 8 and an oil outlet pipe 12, one end of the oil suction pipe 8 extends into the bottom of the transfer case housing 4, and the other end is connected with the oil pump, and one end of the oil outlet pipe 12 is connected with the oil pump, and the other end extends into the top of the transfer case housing 4. For example, in the embodiment, one end of the oil suction pipe 8 extends into the bottom of the transfer case housing 4, and the other end is connected with the lubricating oil pump 10, and one end of the oil outlet pipe 12 is connected with the lubricating oil pump 10, and the other end extends into the top of the transfer case housing 4.

[0053] Based on the structure of the embodiment, when the shift fork 21 pushes the main clutch 20 on the main input shaft 5 to engage with the first gear 16, the main input shaft 5 is disconnected with the main output shaft 7, the pump assembly 9 is not working, the first gear 16 is fixed in the circumference with the main input shaft 5, so that the power of the driving device 1 can be transmitted to the lubricating oil pump 10, the heat dissipation oil pump 15 and the chassis walking oil pump 11 through the first auxiliary output shaft 141 and the second auxiliary output shaft 14 respectively, so that the walking of the chassis walking unit is driven, for example, the chassis walking motor on the chassis can be driven by the chassis walking oil pump 11, so that the mobile pump station is in the walking state, and the lubrication and heat dissipation of the power end can also be realized by the lubricating oil pump 10 and the heat dissipation oil pump 15.

[0054] In addition, by arranging the oil suction pipe 8 and the oil outlet pipe 12, the lubrication inside the transfer box 3 can also be realized, specifically, the lubricating oil 6 is sucked from the bottom of the transfer box shell 4 through the oil suction pipe 3 during operation, and is delivered to the top of the transfer box shell 4 through the oil outlet pipe 12, so that the first gear 16, the second gear 14 and the third gear 13 can be lubricated respectively.

[0055] When the shift fork 21 pushes the main clutch 20 on the main input shaft 5 to move and engage with the main output shaft 7, at this time, the main input shaft 5 is disconnected with the first gear 16, the first auxiliary output shaft 141 and the second auxiliary output shaft 14 do not rotate, and the heat dissipation oil pump 15, the chassis walking oil pump 11 and the lubricating oil pump 10 do not work; the main output shaft 7 can rotate together with the main input shaft 5, so that the power of the driving device 1 is transmitted to the pump assembly 9, and the pump assembly 9 works to make the mobile pump station in the fracturing working state.

[0056] In another embodiment, in order to realize the engagement mode of the main input shaft 5 and the main output shaft 7, the transmission speed ratio of the transfer box 3 can also be changed by arranging a speed changing device 30 in the transfer box 3, the speed changing device is arranged on the main output shaft 7 and connected with the pump assembly 9, and the speed changing device 30 is, for example, a planetary gear train, so that the input rotating speed of the pump assembly 9 can be controlled.

[0057] The embodiment of the utility model drives pump assembly and chassis walking assembly selectively through transfer box, can realize multiple functions through separate driving device, reduce the quantity of driving device, so that the whole volume is smaller and reduces cost.

[0058] Furthermore, the features of the various embodiments shown in the drawings or described in the specification can not be understood to be independent of one another. Rather, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments, thus producing other embodiments not literally described or claimed.

[0059] The above-described embodiments are merely intended to illustrate the technical solutions of the present application, but not to limit the same; even though the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some of the technical features can be replaced equivalently; and such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A mobile pumping station, characterized in that, It includes a drive unit, a transfer case, a pump assembly, and a chassis running assembly. The transfer case is connected to the drive unit, and a main clutch is provided in the transfer case. The drive unit selectively drives the pump assembly or the chassis running assembly through the main clutch.

2. The mobile pumping station according to claim 1, characterized in that, The transfer case includes a transfer case housing, within which a main input shaft and a main output shaft are disposed. The main input shaft is connected to the drive device, and the main output shaft is connected to the pump assembly.

3. The mobile pumping station according to claim 2, characterized in that, The main input shaft is connected to the drive device via a first coupling, and the main output shaft is connected to the pump assembly via a second coupling.

4. The mobile pumping station according to claim 2, characterized in that, A first gear is provided on the main input shaft, and the main clutch selectively engages the first gear or the main output shaft.

5. The mobile pumping station according to claim 4, characterized in that, The main clutch includes a jaw clutch, which is provided with a shift fork. The jaw clutch engages with the first gear or the main output shaft by moving the shift fork axially.

6. The mobile pumping station according to claim 4, characterized in that, The transfer case housing is also provided with at least one auxiliary output shaft, which is connected to at least one oil pump. The first gear is connected to at least one oil pump gear, which is mounted on the corresponding auxiliary output shaft.

7. The mobile pumping station according to claim 6, characterized in that, The oil pump includes at least a chassis-mounted oil pump.

8. The mobile pumping station according to claim 7, characterized in that, The oil pump also includes a lubricating oil pump and / or a cooling oil pump.

9. The mobile pumping station according to claim 6, characterized in that, It also includes an oil suction pipe and an oil outlet pipe. One end of the oil suction pipe extends into the bottom of the transfer case housing, and the other end is connected to the oil pump. One end of the oil outlet pipe is connected to the oil pump, and the other end extends into the top of the transfer case housing.

10. The mobile pumping station according to claim 1, characterized in that, The transfer case is equipped with a speed change device, which is connected to the pump assembly.

11. The mobile pumping station according to claim 1, characterized in that, The chassis travel assembly includes a skid, a tracked chassis, and a hydraulic motor, which is connected to the chassis travel oil pump.

12. The mobile pumping station according to claim 1, characterized in that, It also includes a control unit, which includes a controller and a frequency converter. The frequency converter controls the flow rate of the pump assembly and / or the travel speed of the chassis travel assembly by controlling the drive device.

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