Oil tank and shield tunneling machine hydraulic system

Abstract

The utility model relates to the technical field of hydraulic technology, in particular to an oil tank and a shield tunneling machine hydraulic system. The utility model provides an oil tank which comprises an oil tank body. The partition plate structure is arranged in the oil tank body and divides the interior of the oil tank body into an oil suction area, an oil return area and an oil drainage area; and the circulating cooling oil way sucks oil from the oil return area and the oil drainage area at the same time, cools the oil and conveys the oil to the oil suction area. The utility model further provides a hydraulic system of the shield tunneling machine. And the hydraulic pump sucks oil from the oil suction area and drains the oil to the oil drainage area of the oil tank. The technical problems that in the prior art, high-temperature oil in an oil tank is not concentrated enough, and the cooling effect of the oil is poor are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic pressure, especially relates to an oil tank and shield machine hydraulic system. BACKGROUND

[0002] The shield machine hydraulic system has multiple plunger variable pump groups, with the wide application of high-pressure large-flow hydraulic plunger variable, the energy loss of the shield machine hydraulic system also increases. The energy loss makes the temperature of the oil in the hydraulic oil tank rapidly rise, and the excessively high temperature can shorten the service life of the oil, and research shows that after the oil temperature exceeds 60 DEG C, the service life of the oil will be halved every 10 DEG C rise. The excessively high oil temperature also accelerates the oxidation and metamorphosis of the oil, and cannot provide good protection for the hydraulic components. Therefore, effectively reducing the temperature of the oil in the oil tank is particularly important.

[0003] The main function of the oil tank in the hydraulic system is to store the oil required by the hydraulic system working cycle and dissipate part of the heat generated in the hydraulic system working process, and also plays the role of separating the gas and sediment in the oil and eliminating the foam. According to the specific requirements of the system, the structure of the oil tank can also be reasonably selected to make the oil tank fully play its role.

[0004] At present, the temperature of the oil is mainly considered from two aspects. One is to increase the size of the hydraulic oil tank, use the surface of the oil tank to dissipate heat, and prolong the distance between the hot oil in the oil return area and the pump oil suction area to reduce the temperature, which is an effective measure to control the excessively high oil temperature. However, the shield machine is a tunnel boring machine using the shield method. Due to the limitation of space, there is no extra space to increase the volume of the oil tank. The second is to use the method of increasing the cooling area of the cooler for forced cooling, and control the temperature of the oil through the cooler. Increasing the heat exchange area of the cooler means increasing the cost and the size of the occupied space of the cooler. The above two methods of reducing the temperature of the oil in the oil tank are very effective in other industries, but they are not perfect for the shield machine industry.

[0005] In the prior art, a 10-meter shield machine can be divided into two hydraulic oil tanks, and the total number of plunger variable pumps can be as high as 14, and the number of plunger variable pumps corresponding to each hydraulic oil tank can be as high as 7. Figure 1As shown, for a hydraulic oil tank, a baffle 2' is arranged inside the oil tank 1', preventing the return oil from flowing directly to the oil suction, forming a relatively calm area, i.e. dividing the oil tank 1' into an oil suction area 11' and a return oil area 12'. The temperature of the oil at the discharge port of the piston variable pump 3' can be as high as 90℃, and the discharge of the piston variable pump 3' to the return oil area 12' is the most important source of the temperature of the oil tank 1'. Each piston variable pump 3' discharge pipe 4' is a separate steel pipe arranged in the return oil area, and the piston variable pump 3' discharge pipe 4' is distributed very dispersedly in the return oil area 12'. The circulating pump 5' sucks the hot oil in the return oil area 12', and the oil is sent to the oil suction area 11' after being cooled by the cooler 6', realizing the cooling circulation use of the high-temperature oil. However, the area of the return oil area is too large, the heat of the oil is not concentrated enough, and the high-temperature oil cannot be effectively cooled, and the cooling effect is poor. Practical new type content

[0006] In order to solve the technical problems of the existing art that the high-temperature oil in the oil tank is not concentrated enough and the cooling effect of the oil is poor, the utility model provides an oil tank and a shield machine hydraulic system, which solve the above technical problems.

[0007] In order to solve the above technical problems, the utility model provides an oil tank, which comprises:

[0008] An oil tank body;

[0009] A baffle structure arranged in the oil tank body and separating the oil tank body into an oil suction area, a return oil area and a discharge area;

[0010] A circulating cooling oil circuit which simultaneously sucks oil from the return oil area and the discharge area, cools the oil and then delivers the oil to the oil suction area.

[0011] According to one embodiment of the utility model, the baffle structure comprises a first baffle and a second baffle, one side of the first baffle separates the oil suction area, and the second baffle is located on the other side of the first baffle and separates the return oil area and the discharge area.

[0012] According to one embodiment of the utility model, the first baffle is provided with a through port at the lower end, and the oil suction area and the return oil area are communicated through the through port.

[0013] According to one embodiment of the utility model, the first baffle extends along the length direction of the oil tank body, and the second baffle is arranged perpendicularly to the first baffle.

[0014] According to one embodiment of the utility model, the first baffle is higher than the second baffle.

[0015] According to one embodiment of the utility model, the return oil area is smaller than the oil suction area and larger than the discharge area.

[0016] According to one embodiment of the utility model, the circulating cooling oil circuit comprises a circulating pipeline, one end of the circulating pipeline is communicated with the oil return area and the oil leakage area through two oil suction pipes respectively, the other end of the circulating pipeline is communicated with the oil suction area, and a circulating pump and a cooler are arranged on the circulating pipeline.

[0017] The utility model also provides a shield machine hydraulic system, include:

[0018] Oil tank;

[0019] Hydraulic pump, the hydraulic pump is from the oil suction area oil suction, and the oil leakage area of oil tank is leaked.

[0020] According to one embodiment of the utility model, the hydraulic pump is multiple, and each hydraulic pump is leaked to the total oil leakage pipe through the corresponding oil leakage pipe, and then the oil is leaked to the oil leakage area through the total oil leakage pipe.

[0021] According to one embodiment of the utility model, the oil liquid of oil suction area first enters the total oil supply pipe, and then enters the corresponding hydraulic pump through the oil supply pipe.

[0022] Based on the above technical scheme, the utility model can realize the technical effect:

[0023] The oil tank of the utility model is divided into oil suction area, oil return area and oil leakage area by setting the baffle structure in the oil tank body, so that the high-temperature oil leakage oil liquid can be concentrated in the oil leakage area, the cooling effect of the oil liquid can be ensured by circulating the high-temperature oil leakage oil liquid in the oil suction area after being cooled by the circulating cooling oil circuit, and the cooling circulation efficiency can be ensured by simultaneously cooling the oil liquid in the oil suction area and the oil return area.

[0024] The oil tank of the utility model is specifically provided with the baffle structure including the first baffle and the second baffle, so that the oil suction area, the oil return area and the oil leakage area can be separated; the lower end of the first baffle is provided with a through port, so that the oil suction area and the oil return area can be communicated, the oil liquid circulation distance and time can be prolonged, and the cooling effect is good; the lower end of the first baffle is provided with a through port, the first baffle is higher than the second baffle, the suction inlet of the circulating pump can be prevented from being always filled with oil liquid, the circulating pump can be prevented from being sucked empty, and the oil leakage area can be prevented from being communicated with the oil suction area and the oil return area; the oil return area is further set to be smaller than the oil suction area and larger than the oil leakage area, so that the oil leakage oil liquid and the oil return oil liquid can be further concentrated;

[0025] The shield machine hydraulic system of the utility model, set up the partial oil drain pipe and the total oil drain pipe, the partial oil drain pipe is combined to the total oil drain pipe, the number of the oil drain pipe in the oil tank is reduced, the space is greatly reduced, only one total oil drain pipe is convenient for the operator to clean the oil tank. The oil tank heating temperature highest oil liquid is concentrated together in the oil drain area, the circulating pump suction inlet is easier to suck the high temperature oil liquid to circulate cooling treatment, and the temperature of the oil tank can be effectively reduced. The utility model finds the source of the oil tank oil temperature rise without increasing the oil tank volume, without increasing or less increasing the radiator area, meets the use and design requirements, and realizes energy saving and emission reduction. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the hydraulic principle diagram of the shield machine hydraulic system in the prior art;

[0027] Figure 2 It is the structure schematic view of the oil tank;

[0028] Figure 3 It is the structure schematic view of the oil tank body;

[0029] Figure 4 It is the hydraulic principle diagram of the shield machine hydraulic system;

[0030] In the drawing: 1-oil tank body;11-oil suction area;12-oil return area;13-oil drain area;2-baffle structure;21-first baffle;211-through port;22-second baffle;3-circulating cooling oil circuit;31-circulating pipeline;311-first filter;32-oil suction pipe;33-circulating pump;34-cooler;4-hydraulic pump;51-partial oil drain pipe;52-total oil drain pipe;61-partial oil supply pipe;62-total oil supply pipe;7-hydraulic station outer oil return pipe;71-second filter;8-hydraulic station outer oil drain pipe;1'-oil tank;11'-oil suction area;12'-oil return area;2'-baffle;3'-plunger variable pump;4'-oil drain pipe;5'-circulating pump;6'-cooler. DETAILED DESCRIPTION

[0031] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is only illustrative in nature and by no means as any limitation to the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0032] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0033] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale of the various parts shown in the drawings. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail because they would be understood that such techniques, methods, and apparatus are considered part of the specification. In all examples shown and discussed herein, any specific value is to be interpreted as merely an example, and not as a limitation. Thus, other examples of the example embodiments can have different values. It is noted that like numbers and letters refer to like elements throughout the several views of the drawings and, as such, no further definitions of these numbers and letters are necessary for understanding the drawings. In the description of the present application, it is to be understood that the orientation terms such as "front", "back", "up", "down", "left", "right", "transverse", "vertical", "horizontal", and "top", "bottom" and the like are generally used for the purpose of convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be understood as limiting the scope of protection of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of each component itself.

[0034] In the description of the present application, it is to be understood that the orientation terms such as "front", "back", "up", "down", "left", "right", "transverse", "vertical", "horizontal", and "top", "bottom" and the like are generally used for the purpose of convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be understood as limiting the scope of protection of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of each component itself.

[0035] For the purposes of the description, reference can be made to spatially relative terms, such as "on", "above", "at", "below", "down", "up", "top", "bottom", and the like, to describe the spatial relationship between various elements. It is to be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device is inverted, then the elements described as being "above" or "on" other elements would then be oriented "below" or "on" the other elements. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The terms "first", "second", "third", etc. do not necessarily indicate any ordinal, chronological or other sequence unless expressly stated to do so.

[0036] In addition, it should be noted that the use of "first", "second", etc. words to define parts, only for the convenience of the corresponding parts are distinguished, such as no other declaration, the above words have no special meaning, therefore can not be understood as the limitation of the scope of protection of the utility model.

[0037] As shown in Figures 2-4 The embodiment provides an oil tank, which comprises an oil tank body 1, a partition plate structure 2 and a circulating cooling oil circuit 3. The partition plate structure 2 divides the oil tank body 1 into an oil suction area 11, an oil return area 12 and an oil discharge area 13. The circulating cooling oil circuit 3 sucks oil in the oil return area 12 and the oil discharge area 13, cools the oil and then delivers the oil to the oil suction area 11, so that the oil is recycled.

[0038] As shown in Figures 2-3 The oil tank body 1 is used for containing oil. In the embodiment, the oil tank body 1 can be a rectangular container.

[0039] As shown in Figures 2-3 The partition plate structure 2 is arranged in the oil tank body 1 and divides the oil tank body 1 into different areas. Specifically, the partition plate structure 2 comprises a first partition plate 21 and a second partition plate 22. One side of the first partition plate 21 is the oil suction area 11, and the second partition plate 22 is located on the other side of the first partition plate 21 and divides the area on the other side of the first partition plate 21 into the oil return area 12 and the oil discharge area 13.

[0040] As a preferred technical scheme of the embodiment, the first partition plate 21 extends along the length direction of the oil tank body 1, and the second partition plate 22 is arranged perpendicularly to the first partition plate 21.

[0041] As a preferred technical solution of the embodiment, the lower end of the first partition plate 21 is provided with a through port 211, so as to facilitate the communication between the oil suction area 11 and the oil return area 12. Specifically, the first partition plate 21 is substantially in the shape of a square plate, and a triangular gap is formed at one of the lower end corners of the first partition plate 21. When the first partition plate 21 is fixed in the oil tank body 1, the triangular gap and the inner wall of the oil tank body 1 form the through port 211.

[0042] As a preferred technical solution of the embodiment, the edges of the first partition plate 21, except the triangular gap, are welded with the inner surface of the oil tank body 1 to form a seal; the second partition plate 22 is square, and the second partition plate 22 is fully welded with the first partition plate 21, the bottom surface and the side surface of the oil tank body 1, so as to prevent the communication between the oil leakage area 13 and the oil suction area 11 and the oil return area 12.

[0043] As a preferred technical solution of the embodiment, the height of the first partition plate 21 is higher than the height of the second partition plate 22, so as to facilitate the overflow of the oil liquid in the oil return area 12 to the oil leakage area 13 to supplement the oil in the oil leakage area 13 in the case that the oil amount in the oil leakage area 13 is too small, so as to prevent the suction of the circulating pump 33 from being empty, and the oil liquid in the oil leakage area 13 will not enter the oil suction area 11 and the oil return area 12.

[0044] As a preferred technical solution of the embodiment, the first partition plate 21 and the second partition plate 22 are both made of thin steel plates with the same thickness as the side plates of the oil tank body 1, and the upper edges of the first partition plate 21 and the second partition plate 22 are bent to play the role of reinforcing plates.

[0045] As a preferred technical solution of the embodiment, the side plates of the oil tank body 1 are pressed in a new type of concave die corrugated mode, which is beautiful and lightens the weight of the oil tank without losing the strength of the steel plate.

[0046] As a preferred technical solution of the embodiment, the oil suction area 11 is larger than the oil return area 12, and the oil return area 12 is larger than the oil leakage area 13, which is more conducive to the concentration of the high-temperature oil liquid in the oil leakage area 13. Further preferably, the oil suction area 11 can be half of the internal area of the oil tank body 1.

[0047] The circulating cooling oil circuit 3 sucks the oil liquid in the oil return area 12 and the oil leakage area 13, cools the oil liquid, and then delivers the oil liquid to the oil suction area 11. The circulating cooling oil circuit 3 includes a circulating pipeline 31, one end of the circulating pipeline 31 communicates with the oil return area 12 and the oil leakage area 13, the other end of the circulating pipeline 31 communicates with the oil suction area 11, and the circulating pipeline 31 is provided with a circulating pump 33 and a cooler 34. The circulating pump 33 provides driving force, and the cooler 34 cools the high-temperature oil liquid.

[0048] As a preferred technical solution of the embodiment, the input end of the circulation pipeline 31 is communicated with the oil return area 12 and the oil leakage area 13 through two oil suction pipes 32 respectively. The first end of one oil suction pipe 32 extends into the oil return area 12, and the second end is communicated with the circulation pipeline 31, which is used for communicating the oil return area 12 with the circulation pipeline 31. The first end of the other oil suction pipe 32 extends into the oil leakage area 13, and the second end is communicated with the circulation pipeline 31, which is used for communicating the oil leakage area 13 with the circulation pipeline 31.

[0049] As a preferred technical solution of the embodiment, the two oil suction pipes 32 are arranged close to the inner bottom surface of the oil tank body 1 and are communicated with the oil return area 12 and the oil leakage area 13 respectively. In terms of structure, the circulation pipeline 31 extends into the oil leakage area 13 from the side wall of the oil tank body 1 and is divided into two oil suction pipes 32. One oil suction pipe 32 is located in the oil leakage area 13, and the other oil suction pipe 32 passes through the second partition plate 22 and is communicated with the oil return area 12. The oil suction pipe 32 passing through the second partition plate 22 is welded with the second partition plate 22, so as to ensure that the oil does not leak between the oil return area 12 and the oil leakage area 13.

[0050] As a preferred technical solution of the embodiment, the circulation pipeline 31 extends into the oil tank body 1 from the upper end of the oil suction area 11. Preferably, a first filter 311 is arranged at the outlet of the circulation pipeline 31, which facilitates filtering the oil entering the oil suction area 11.

[0051] As shown in Figure 4 , the embodiment also provides a hydraulic system of a shield tunneling machine, which comprises the foregoing oil tank and a hydraulic pump 4. The hydraulic pump 4 sucks oil from the oil suction area 11 of the oil tank and discharges oil to the oil leakage area 13 of the oil tank.

[0052] The hydraulic pump 4 is multiple, and the multiple hydraulic pumps 4 suck oil from the oil suction area 11 through a total oil supply pipe 62 and a plurality of branch oil supply pipes 61. Specifically, one end of the total oil supply pipe 62 is communicated with the oil suction area 11, and the other end of the total oil supply pipe 62 is communicated with the plurality of branch oil supply pipes 61. The branch oil supply pipes 61 are arranged correspondingly to the hydraulic pumps 4, and the branch oil supply pipes 61 are communicated with the pump inlets of the hydraulic pumps 4 correspondingly.

[0053] The multiple hydraulic pumps 4 discharge oil to the oil leakage area 13 through a total oil discharge pipe 52 and a plurality of branch oil discharge pipes 51. Specifically, the oil discharge port of each hydraulic pump 4 is respectively communicated with one branch oil discharge pipe 51, and the branch oil discharge pipes 51 are communicated with the total oil discharge pipe 52, so as to discharge oil to the oil leakage area 13 through the total oil discharge pipe 52.

[0054] As a preferred technical solution of the embodiment, the hydraulic system of the shield tunneling machine further comprises an external hydraulic station oil return pipe 7 and an external hydraulic station oil leakage pipe 8. The external hydraulic station oil return pipe 7 introduces external hydraulic station oil return oil to the oil return area 12, and the external hydraulic station oil leakage pipe 8 introduces external hydraulic station oil leakage oil to the oil leakage area 13. Preferably, the outlet end of the external hydraulic station oil return pipe 7 is further provided with a second filter 71, which filters the oil return oil.

[0055] As the preferred technical solution of the embodiment, the hydraulic pump 4 can be but is not limited to a plunger pump.

[0056] Based on the above technical solution, the process flow of the hydraulic system of the shield machine is as follows: the total oil drain pipe 52 and the oil drain pipe outside the hydraulic station 8 guide the oil drain oil back to the oil drain area 13, and the oil return pipe outside the hydraulic station 7 guides the oil return oil back to the oil return area 12. The circulating pump 33 respectively sucks oil from the oil drain area 13 and the oil return area 12, the discharged hot oil is cooled by the cooler 34 and then returned to the oil suction area 11 through the first filter 311, forming a cycle. This circulating flow mode can ensure that the circulating pump 33 sucks hot oil, which is more conducive to the cooling of the oil.

[0057] In the embodiment, the oil drain pipes 51 of the hydraulic pumps 4 are connected in parallel and merged into the total oil drain pipe 52, and together with the oil drain pipe outside the hydraulic station 8, guide the oil drain oil back to the oil drain area 13 in the oil tank. The space occupied by the oil drain pipe in the oil tank is greatly reduced, and only one total oil drain pipe 52 is convenient for the operator to clean the oil tank. The oil drain area 13 concentrates the oil with the highest temperature in the oil tank, and the suction port of the circulating pump 33 is easier to suck the oil with high temperature for circulating cooling treatment, which can more effectively reduce the temperature of the oil tank.

[0058] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. An oil tank characterized by comprising: The oil tank comprises: an oil tank body (1); a partition structure (2) arranged in the oil tank body (1) and separating the oil tank body (1) into an oil suction area (11), an oil return area (12) and an oil discharge area (13); a circulating cooling oil circuit (3) which simultaneously sucks oil from the oil return area (12) and the oil discharge area (13), cools the oil and then delivers the cooled oil to the oil suction area (11).

2. A tank as claimed in claim 1, wherein The partition structure (2) comprises a first partition (21) and a second partition (22), one side of the first partition (21) separates the oil suction area (11), and the second partition (22) is arranged on the other side of the first partition (21) to separate the oil return area (12) and the oil discharge area (13).

3. A tank as claimed in claim 2, wherein The lower end of the first partition (21) is provided with a through port (211), and the oil suction area (11) and the oil return area (12) are communicated through the through port (211).

4. An oil tank according to claim 2, wherein The first partition (21) extends along the length direction of the oil tank body (1), and the second partition (22) is arranged perpendicularly to the first partition (21).

5. An oil tank according to claim 2, wherein The first partition (21) is higher than the second partition (22).

6. An oil tank according to claim 1, characterized in that The oil return area (12) is smaller than the oil suction area (11) and larger than the oil discharge area (13).

7. An oil tank according to claim 1, characterized in that The circulating cooling oil circuit (3) comprises a circulating pipeline (31), one end of the circulating pipeline (31) is communicated with the oil return area (12) and the oil discharge area (13) through two oil suction pipes (32), the other end of the circulating pipeline (31) is communicated with the oil suction area (11), and a circulating pump (33) and a cooler (34) are arranged on the circulating pipeline (31).

8. A hydraulic system for a tunneling machine, characterized in that The oil tank comprises: the oil tank of any one of claims 1-7; a hydraulic pump (4) which sucks oil from the oil suction area (11) and discharges the oil to the oil discharge area (13) of the oil tank.

9. The hydraulic system of a tunneling machine according to claim 8, characterized in that, The hydraulic pump (4) is a plurality of hydraulic pumps, each hydraulic pump (4) discharges oil to a total oil discharge pipe (52) through a corresponding oil discharge branch pipe (51), and then discharges the oil to the oil discharge area (13) through the total oil discharge pipe (52).

10. The hydraulic system of a tunneling machine according to claim 8, wherein, The oil in the oil suction area (11) first enters a total oil supply pipe (62), and then enters a corresponding hydraulic pump (4) through an oil supply branch pipe (61).

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