Settling tank

Abstract

The invention provides a settling tank. The settling tank comprises a tank body; the oil collecting assembly comprises a frame and an oil collecting part, the frame is arranged in the tank body in a floatable mode, the outer side wall of the frame is attached to the inner side wall of the tank body in a sealed mode, an inner cavity of the tank body is divided into an upper cavity and a lower cavity which are not communicated with each other through the frame, and the oil collecting part is arranged on the frame and provided with an oil collecting inlet and an oil collecting outlet which are communicated with each other; and the oil collecting inlet is positioned in the lower chamber. According to the technical scheme provided by the invention, the problems that a settling tank pollutes air and a pipeline is easy to block in the prior art can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of settling tanks, and in particular to a settling tank. Background Art

[0002] The settling tank is a device used to separate oil-water mixture. The oil-water mixture enters the settling tank from the inlet pipeline, and the surfactant is used to reduce the surface tension of the oil-water interface, and the oil-water separation is achieved under the difference in oil-water density. In the actual separation process, a large amount of volatile organic matter will volatilize on the liquid surface in the settling tank.

[0003] In the related art, the floating oil in the tank is recovered by using a fixed oil collection weir set in the settling tank. Before the thickness of the oil layer reaches the fixed oil collection weir, under the influence of factors such as the temperature and pressure in the tank, a gas phase space containing volatile organic gases will be formed in the tank. When the overall liquid level rises or the temperature rises and the settling tank breathes, the volatile organic gases will be discharged into the air outside the tank, causing atmospheric pollution. At the same time, if the oil is not collected in time, a large amount of floating oil will often condense into blocks, block the pipeline, and form a wall hanging phenomenon, which will have an adverse effect on the subsequent work of the water treatment system and gas emission control. Summary of the invention

[0004] The invention provides a sedimentation tank to solve the problem in the related art that the sedimentation tank pollutes the air and the pipeline is easily blocked.

[0005] The present invention provides a sedimentation tank, which comprises: a tank body; an oil collecting assembly, including a frame and an oil collecting piece, wherein the frame can be floatingly arranged in the tank body, the outer wall of the frame is sealingly fitted with the inner wall of the tank body, the frame divides the inner cavity of the tank body into an upper chamber and a lower chamber which are not connected to each other, the oil collecting piece is arranged on the frame, the oil collecting piece has a connected oil collecting inlet and an oil collecting outlet, and the oil collecting inlet is located in the lower chamber.

[0006] Furthermore, the oil collecting member comprises an oil collecting pipe horizontally arranged below the frame, and the oil collecting pipe is provided with a plurality of oil collecting inlets spaced apart in a horizontal direction.

[0007] Furthermore, the oil collecting pipe includes a horizontally arranged annular pipe section and multiple straight pipe sections, the multiple straight pipe sections are arranged at intervals along the circumference of the annular pipe section, the multiple straight pipe sections are all connected to the annular pipe section, and the annular pipe section and the multiple straight pipe sections are all provided with oil collecting inlets.

[0008] Furthermore, the oil collecting component also includes a vertically arranged conical tube and a connecting tube, the two ends of the connecting tube are respectively connected to the oil collecting tube and the conical tube, the cross-sectional size of the conical tube gradually decreases from top to bottom, and the oil collecting inlet is arranged at the upper end of the conical tube.

[0009] Furthermore, the oil collecting assembly also includes a ring-shaped sealing airbag, which is arranged on the outer periphery of the frame, the inner ring of the sealing airbag is sealed and fitted with the frame, and the outer ring of the sealing airbag is sealed and fitted with the inner wall of the tank body.

[0010] Furthermore, the oil collecting assembly also includes a sealing film, which extends in a horizontal direction and covers the frame, and the outer edge of the sealing film is sealed and connected to the sealing airbag.

[0011] Furthermore, the oil collecting assembly also includes an air bleed valve, which includes a valve body and a valve cover. The valve body has an air bleed hole arranged vertically therethrough, the valve body is arranged on a frame, and a support rod is also arranged in the tank body, and the lower end of the support rod is connected to the bottom wall of the tank body. The valve cover has a floating state in which it is covered on the valve body to block the air bleed hole, and a separated state in which it is separated from the valve body and located at the upper end of the support rod. When the valve cover is in the floating state, the support rod is located directly below the valve body, and when the valve cover is in the separated state, the support rod is penetrated into the valve body, and the valve cover is located on the support rod.

[0012] Furthermore, the oil collecting assembly also includes an anti-rotation rope, the two ends of which are respectively connected to the bottom wall of the tank body and the top wall of the tank body, and the anti-rotation rope passes through the frame and is sealed with the frame.

[0013] Furthermore, a plurality of floats are arranged on the frame, and the floats are closed structures with cavities; the sedimentation tank also includes an ultrasonic sensor, a controller and an oil recovery pump, the ultrasonic sensor is arranged on the frame, the oil recovery pump is arranged on the oil recovery part, and the ultrasonic sensor and the oil recovery pump are both electrically connected to the controller; a support frame capable of supporting the frame is arranged on the inner wall of the tank body.

[0014] Furthermore, the oil collecting assembly also includes a suspension rod extending vertically, the upper end of the suspension rod is connected to the frame, and the lower end of the suspension rod is connected to the oil collecting pipe; and / or, the oil collecting component also includes an oil outlet pipe, the oil outlet pipe is connected to the oil collecting pipe, and the oil outlet pipe passes through the side wall of the tank body to form an oil collecting outlet.

[0015] By applying the technical solution of the present invention, the sedimentation tank includes a tank body and an oil collection component. When the oil-water mixture is poured into the tank body, the oil layer will float above the water. With the pouring of the oil-water mixture, the frame can float above the oil layer under the action of buoyancy, and the oil collection inlet of the oil collection component floats on the oil-water interface. The oil layer flows into the oil collection component through the oil collection inlet and is discharged through the oil collection outlet, thereby reducing the oil content and avoiding pipeline blockage and wall hanging. In addition, since the frame divides the inner cavity of the tank body into an upper chamber and a lower chamber that are not connected to each other, the outer wall of the frame is sealed and fitted with the inner wall of the tank body, even if there is a small amount of volatile organic gas, it cannot enter the upper chamber from the lower chamber, and will not be discharged outside the tank body, and will not cause air pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A side view of a settling tank provided according to an embodiment of the present invention is shown;

[0018] Figure 2 A top view of an oil collecting assembly of a settling tank provided according to an embodiment of the present invention is shown;

[0019] Figure 3 A side view of a tank body and an oil collecting assembly provided according to an embodiment of the present invention is shown;

[0020] Figure 4 Shows Figure 3 A local enlarged view of point A in FIG.

[0021] Figure 5 A schematic structural diagram of an anti-rotation rope and an air release valve of a settling tank provided according to an embodiment of the present invention is shown.

[0022] The above drawings include the following reference numerals:

[0023] 10. Tank body; 11. Support rod; 12. Support frame;

[0024] 20. Oil collecting assembly; 21. Frame; 211. Float; 22. Oil collecting part; 221. Oil collecting pipe; 2211. Annular pipe section; 2212. Straight pipe section; 222. Conical pipe; 223. Connecting pipe; 23. Sealing airbag; 24. Deflation valve; 241. Valve body; 242. Valve cover; 25. Anti-rotation rope; 26. Lifting rod; 27. Oil outlet pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0026] like Figures 1 to 5As shown, an embodiment of the present invention provides a sedimentation tank, which includes a tank body 10 and an oil collecting assembly 20. The oil collecting assembly 20 includes a frame 21 and an oil collecting part 22. The frame 21 can be floated in the tank body 10. The outer wall of the frame 21 is sealed and fitted with the inner wall of the tank body 10. The frame 21 divides the inner cavity of the tank body 10 into an upper chamber and a lower chamber that are not connected to each other. The oil collecting part 22 is arranged on the frame 21. The oil collecting part 22 has a connected oil collecting inlet and an oil collecting outlet, and the oil collecting inlet is located in the lower chamber.

[0027] By applying the technical solution of the present invention, the sedimentation tank includes a tank body 10 and an oil collecting component 20. When the oil-water mixture is poured into the tank body 10, the oil layer will float above the water. With the pouring of the oil-water mixture, the frame 21 can float above the oil layer under the action of buoyancy, and the oil collecting inlet of the oil collecting component 22 floats on the oil-water interface. The oil layer flows into the oil collecting component 22 through the oil collecting inlet and is discharged through the oil collecting outlet, thereby reducing the oil content and avoiding pipeline blockage and wall hanging. In addition, since the frame 21 divides the inner cavity of the tank body 10 into an upper chamber and a lower chamber that are not connected to each other, the outer wall of the frame 21 is sealed and fitted with the inner wall of the tank body 10, even if there is a small amount of volatile organic gas, it cannot enter the upper chamber from the lower chamber, and will not be discharged outside the tank body 10, and will not cause air pollution.

[0028] It should be noted that the outer wall of the frame 21 and the inner wall of the tank body 10 can be directly attached or indirectly attached to form a sealed fit. At the same time, the frame 21 can be directly set as a structure with a closed upper surface to separate the inner cavity of the tank body 10 into an upper chamber and a lower chamber, which can also be achieved by attaching a sealing film to the frame 21.

[0029] The actual position of the oil collection inlet is obtained through precise calculation based on the oil-water ratio and the oil collection volume.

[0030] In this embodiment, the oil-water mixture enters the tank body 10 through a water injection pipeline arranged at the bottom of the tank body 10 , and an overflow port is arranged at the top of the tank body 10 .

[0031] like Figure 2 and Figure 3 As shown, the oil collecting member 22 includes an oil collecting pipe 221 horizontally arranged below the frame 21, and the oil collecting pipe 221 has a plurality of oil collecting inlets arranged at intervals in the horizontal direction. The oil collecting pipe 221 is used to collect oil, which has the advantages of simple structure and convenient material collection.

[0032] like Figure 2As shown, the oil collecting pipe 221 includes a horizontally arranged annular pipe section 2211 and a plurality of straight pipe sections 2212. The plurality of straight pipe sections 2212 are arranged at intervals along the circumference of the annular pipe section 2211. The plurality of straight pipe sections 2212 are all connected to the annular pipe section 2211. The annular pipe section 2211 and the plurality of straight pipe sections 2212 are all provided with oil collecting inlets. The oil collecting pipe 221 with the above-mentioned structure has the advantages of simple structure and easy processing.

[0033] The annular pipe section 2211 can be configured as a full ring structure or a partial ring structure. The annular pipe section 2211 can be a circular ring or other forms of annular structures.

[0034] like Figure 3 and Figure 4 As shown, the oil collecting member 22 further includes a vertically arranged tapered tube 222 and a connecting tube 223, the two ends of the connecting tube 223 are respectively connected to the oil collecting tube 221 and the tapered tube 222, the cross-sectional size of the tapered tube 222 gradually decreases from top to bottom, and the oil collecting inlet is arranged at the upper end of the tapered tube 222. With the above-mentioned oil collecting member 22, the tapered tube 222 can be used to increase the area of ​​the oil collecting inlet, thereby increasing the flow rate at the oil collecting inlet to speed up the oil discharge speed.

[0035] like Figure 3 As shown, the oil collecting assembly 20 further includes a sealing airbag 23 arranged in an annular shape, the sealing airbag 23 is arranged on the outer periphery of the frame 21, the inner ring of the sealing airbag 23 is sealed and fitted with the frame 21, and the outer ring of the sealing airbag 23 is sealed and fitted with the inner wall of the tank body 10. The method of using the sealing airbag 23 to form a sealed fit between the frame 21 and the tank body 10 has the advantages of simple structure and easy arrangement.

[0036] In this embodiment, the sealing airbag 23 is extruded from polyvinyl chloride mixed with fluorosilicone rubber. The oil collecting assembly 20 includes two sealing airbags 23, which are arranged vertically to form a double-layer sealing structure to enhance the sealing performance.

[0037] Specifically, the oil collecting assembly 20 further comprises a sealing film, which extends horizontally and covers the frame 21, and the outer edge of the sealing film is sealed and connected to the sealing airbag 23. The sealing film is used to seal the upper part of the frame 21, which has the advantages of simple structure and easy installation.

[0038] Among them, the sealing membrane is made of polyester fiber and polyvinyl chloride in a specific proportion.

[0039] like Figure 3 and Figure 5As shown, the oil collecting assembly 20 also includes an air venting valve 24, which includes a valve body 241 and a valve cover 242. The valve body 241 has an air venting hole arranged vertically therethrough, and the valve body 241 is arranged on the frame 21. A support rod 11 is also arranged in the tank body 10, and the lower end of the support rod 11 is connected to the bottom wall of the tank body 10. The valve cover 242 has a floating state in which it is covered on the valve body 241 to block the air venting hole, and a separated state in which it is separated from the valve body 241 and located at the upper end of the support rod 11. When the valve cover 242 is in the floating state, the support rod 11 is located directly below the valve body 241. When the valve cover 242 is in the separated state, the support rod 11 is penetrated in the valve body 241, and the valve cover 242 is located on the support rod 11. During the process of injecting the oil-water mixture into the water injection pipeline, the upper chamber and the lower chamber can be connected by the air release hole of the air release valve 24, and the gas in the lower chamber is discharged into the upper chamber to balance the pressure of the upper chamber and the lower chamber. In addition, when the frame 21 floats, the valve cover 242 is covered on the valve body 241 to block the air release hole, so that the upper chamber and the lower chamber are not connected to each other.

[0040] Among them, the upper end of the support rod 11 and the valve cover 242 can also be set as a fixedly connected structure, and the support rod 11 can be set as a free end. When the oil-water mixture is not poured, the valve cover 242 and the support rod 11 fall freely by gravity until they contact the bottom of the tank body 10. After the oil-water mixture is poured, when the valve body 241 floats to the position of the valve cover 242, the valve cover 242 is covered on the valve body 241, and the valve body 241 drives the valve cover 242 to float.

[0041] In this embodiment, the valve body 241 penetrates the sealing membrane and is in sealing cooperation with the sealing membrane.

[0042] like Figure 1 and Figure 5 As shown, the oil collecting assembly 20 further includes an anti-rotation rope 25, the two ends of which are respectively connected to the bottom wall of the tank body 10 and the top wall of the tank body 10, and the anti-rotation rope 25 passes through the frame 21 and is sealed with the frame 21. The anti-rotation rope 25 can prevent the frame 21 from rotating when floating, so as to reduce the friction between the sealing airbag 23 and the inner wall of the tank body 10 and extend the service life.

[0043] In this embodiment, there are two anti-rotation ropes 25, and both anti-rotation ropes 25 are in sealing cooperation with the sealing membrane.

[0044] Among them, the anti-rotation rope 25 can also be set as one. When the anti-rotation rope 25 is one, it needs to be set eccentrically with the center line of the tank body 10. Of course, the anti-rotation rope 25 can also be set as multiple.

[0045] like Figure 3As shown, a plurality of floats 211 are provided on the frame 21. The floats 211 are closed structures with cavities. The floats 211 can provide buoyancy for the frame 21, so that the frame 21 floats after being injected with oil-water mixture, which has the advantage of simple structure.

[0046] In this embodiment, the sedimentation tank further includes an ultrasonic sensor, a controller and an oil recovery pump. The ultrasonic sensor is arranged on the frame 21, and the oil recovery pump is arranged on the oil recovery member 22. The ultrasonic sensor and the oil recovery pump are both electrically connected to the controller. The thickness of the oil layer and the water level can be measured by the ultrasonic sensor. According to the data measured by the ultrasonic sensor, the working state of the oil recovery pump can be controlled by the controller to extract the oil, thereby realizing automatic control of oil recovery.

[0047] A support frame 12 capable of supporting the frame 21 is provided on the inner wall of the tank body 10. The support frame can support the frame 21 so that when the tank body 10 is not filled with oil-water mixture, the frame 21 will not slide to the bottom of the tank body 10, thereby reducing its floating distance.

[0048] Specifically, the support frame 12 is a plurality of welding protrusions disposed on the inner side wall of the tank body 10 , and the plurality of welding protrusions are disposed at intervals along the circumference of the tank body 10 .

[0049] In this embodiment, the frame 21 includes an outer ring and a plurality of reinforcing beams disposed in the outer ring, the plurality of reinforcing beams are arranged in a staggered manner, and the buoy 211 is arranged between two adjacent reinforcing beams. The oil collecting pipe 221 is connected to the reinforcing beams.

[0050] like Figure 4 As shown, the oil collecting assembly 20 also includes a suspension rod 26 extending vertically, the upper end of the suspension rod 26 is connected to the frame 21, and the lower end of the suspension rod 26 is connected to the oil collecting pipe 221. The suspension rod 26 is used to connect the frame 21 and the oil collecting pipe 221, which has the advantage of simple structure.

[0051] In this embodiment, there are multiple suspension rods 26, and the upper ends of the suspension rods 26 are connected to the reinforcement beams.

[0052] The oil collecting member 22 further includes an oil outlet pipe 27, which is connected to the oil collecting pipe 221 and passes through the side wall of the tank body 10 to form an oil collecting outlet. The oil outlet pipe 27 can discharge the collected oil out of the tank body 10, which has the advantage of a simple structure.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0055] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0056] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0057] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A settling tank, characterized in that: The settling tank comprises: Tank body (10); The oil collecting assembly (20) comprises a frame (21) and an oil collecting member (22). The frame (21) can be arranged in a floating manner in the tank body (10). The outer wall of the frame (21) is sealed and fitted with the inner wall of the tank body (10). The frame (21) divides the inner cavity of the tank body (10) into an upper chamber and a lower chamber that are not connected to each other. The oil collecting member (22) is arranged on the frame (21). The oil collecting member (22) has an oil collecting inlet and an oil collecting outlet that are connected to each other. The oil collecting inlet is located in the lower chamber.

2. The settling tank according to claim 1, characterized in that: The oil collecting member (22) comprises an oil collecting pipe (221) arranged horizontally below the frame (21), and the oil collecting pipe (221) has a plurality of oil collecting inlets arranged at intervals in the horizontal direction.

3. The settling tank according to claim 2, characterized in that: The oil collecting pipe (221) comprises a horizontally arranged annular pipe section (2211) and a plurality of straight pipe sections (2212); the plurality of straight pipe sections (2212) are arranged at intervals along the circumference of the annular pipe section (2211); the plurality of straight pipe sections (2212) are all connected to the annular pipe section (2211); and the annular pipe section (2211) and the plurality of straight pipe sections (2212) are both provided with the oil collecting inlet.

4. The settling tank according to claim 2, characterized in that: The oil collecting member (22) further comprises a vertically arranged conical tube (222) and a connecting tube (223), the two ends of the connecting tube (223) being respectively connected to the oil collecting tube (221) and the conical tube (222), the cross-sectional size of the conical tube (222) gradually decreasing in a direction from top to bottom, and the oil collecting inlet is arranged at the upper end of the conical tube (222).

5. The settling tank according to claim 1, characterized in that: The oil collecting assembly (20) further comprises an annularly arranged sealing airbag (23), wherein the sealing airbag (23) is arranged on the outer periphery of the frame (21), the inner ring of the sealing airbag (23) is sealingly fitted to the frame (21), and the outer ring of the sealing airbag (23) is sealingly fitted to the inner side wall of the tank body (10).

6. The settling tank according to claim 5, characterized in that: The oil collecting assembly (20) further comprises a sealing film, which extends in a horizontal direction and covers the frame (21), and the outer edge of the sealing film is sealedly connected to the sealing airbag (23).

7. The settling tank according to claim 1, characterized in that: The oil collecting assembly (20) further comprises an air release valve (24), the air release valve (24) comprising a valve body (241) and a valve cover (242), the valve body (241) having an air release hole vertically penetrating therethrough, the valve body (241) being arranged on the frame (21), a support rod (11) being further arranged in the tank body (10), the lower end of the support rod (11) being connected to the bottom wall of the tank body (10), the valve cover (242) having a cover arranged on the valve body (2 The valve cover (242) is in a floating state on the valve body (241) to block the vent hole, and in a separated state separated from the valve body (241) and located at the upper end of the support rod (11). When the valve cover (242) is in the floating state, the support rod (11) is located directly below the valve body (241). When the valve cover (242) is in the separated state, the support rod (11) is inserted into the valve body (241), and the valve cover (242) is located on the support rod (11).

8. The settling tank according to claim 1, characterized in that: The oil collecting assembly (20) further comprises an anti-rotation rope (25), the two ends of which are respectively connected to the bottom wall of the tank body (10) and the top wall of the tank body (10), and the anti-rotation rope (25) passes through the frame (21) and is sealed with the frame (21).

9. The settling tank according to claim 1, characterized in that: A plurality of buoys (211) are arranged on the frame (21), and the buoys (211) are closed structures with cavities; The sedimentation tank further comprises an ultrasonic sensor, a controller and an oil recovery pump, wherein the ultrasonic sensor is arranged on the frame (21), the oil recovery pump is arranged on the oil recovery member (22), and the ultrasonic sensor and the oil recovery pump are both electrically connected to the controller; A support frame (12) capable of supporting the frame (21) is arranged on the inner side wall of the tank body (10).

10. The settling tank according to claim 2, characterized in that: The oil collecting assembly (20) further comprises a suspension rod (26) extending in a vertical direction, wherein the upper end of the suspension rod (26) is connected to the frame (21), and the lower end of the suspension rod (26) is connected to the oil collecting pipe (221); and / or, The oil collecting member (22) further comprises an oil outlet pipe (27), the oil outlet pipe (27) being in communication with the oil collecting pipe (221), and the oil outlet pipe (27) passing through the side wall of the tank body (10) to form the oil collecting outlet.

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