Siphon oil return device of water cutting device without oil return opening

Abstract

The utility model discloses a siphon oil return device of a water cutting device without an oil return opening, and belongs to the technical field of petroleum storage. The device comprises a crude oil tank, a water cutting device and a siphon pipeline, the oil tank is communicated with the water cutting device through a main pipeline, a switch valve is installed on the main pipeline, one end of the siphon pipeline is communicated with the main pipeline, the other end of the siphon pipeline is connected with a siphon pressurization bag, and a siphon pressurization opening is formed in the siphon pressurization bag. An elastic membrane located between the siphon pressurizing opening and the siphon pipeline is arranged in the siphon pressurizing bag. Oil flowing into the main pipeline is sucked into the siphon pipeline and the second capsule shell according to the siphon principle, compressed air is adopted to push the elastic membrane to press oil back into the oil tank after operation is conducted for a period of time, the structure is simple, use is convenient, the elastic membrane is a composite layer of the polytetrafluoroethylene layer and the nitrile rubber buna layer and has excellent elasticity, and the service life of the oil tank is prolonged. And the maintenance rate is greatly reduced.

Description

Technical Field

[0001] This utility model belongs to the field of petroleum storage technology, specifically a siphon oil return device for a water cutter without an oil return port. Background Technology

[0002] To meet safety and environmental protection requirements, oil tank dehydration must be equipped with automatic water cutters to ensure continuous dehydration. During the dehydration process, the oil entering the water cutter must automatically return to the oil tank for dehydration to continue. When the dehydration outlet of the storage tank is a siphon outlet, the oil in the water cutter cannot automatically float back to the oil tank due to density difference; external force is required to pump the oil at the top of the water cutter back to the oil tank. To address the above issues, the applicant's affiliated company filed a Chinese patent application (202320281928.6) on February 21, 2023, entitled "A Siphon-Type Automatic Dehydration Oil Tank Oil Pipeless Return System." This system directly squeezes the liquid with compressed gas and uses a magnetic ring induction switch on the float rod of a safety one-way valve. Utilizing both a liquid level sensor and the magnetic ring induction switch for dual detection, it ensures that oil will not leak even in the event of a power outage or gas cutoff, through both mechanical and electrical control. However, in actual operation, the applicant found that although the above-mentioned siphon-type automatic dehydration oil return system for oil tanks can ensure the normal operation of the equipment, its structure is relatively complex, it is prone to failure after a long period of operation, and its cost is also high. Utility Model Content

[0003] The present invention aims to solve at least one of the above-mentioned technical problems by providing a siphon oil return device for a water cutter without an oil return port, comprising an oil tank and a water cutter, wherein the oil tank and the water cutter are connected by a main pipeline, and further comprising a siphon pipeline, wherein one end of the siphon pipeline is connected to the main pipeline, and the other end is connected to a siphon pressure bladder, wherein the siphon pressure bladder is provided with a siphon pressure port, and wherein an elastic diaphragm is provided inside the siphon pressure bladder between the siphon pressure port and the siphon pipeline.

[0004] In the above technical solution, the siphon pressurization bladder includes a first bladder shell and a second bladder shell, the siphon pressurization port is disposed on the first bladder shell, the siphon tube is connected to the interior of the second bladder shell, and the elastic diaphragm is located between the first bladder shell and the second bladder shell.

[0005] In the above technical solution, the elastic diaphragm includes a polytetrafluoroethylene layer disposed on the top of the second shell and a nitrile rubber layer adhered to the polytetrafluoroethylene layer.

[0006] In the above technical solution, there are two siphon pressurization bladders, and each siphon pressurization bladder is connected to the main pipeline through a siphon pipeline.

[0007] The above technical solution also includes a return oil pump, one end of which is connected to the water cutter, and the other end is connected to the main pipeline through a first forced return oil pipe. The outlet of the first forced return oil pipe is located between the siphon pipeline and the water cutter.

[0008] In the above technical solution, the connection between the siphon pipeline and the main pipeline is the siphon pipe opening, and the outlet of the first forced return oil pipe is located near the siphon pipe opening.

[0009] In the above technical solution, the return oil pump is also connected to the siphon pressurization port on the siphon pressurization bladder through a second forced return oil pipe.

[0010] This utility model provides a siphon oil return device for a water cutter without an oil return port. It uses the siphon principle to draw oil flowing into the main pipeline into the siphon pipeline and the second bladder. After running for a period of time, compressed air is used to push the elastic diaphragm to press the oil back into the oil tank. Its structure is simple and easy to use. Since the elastic diaphragm is made of a composite layer of polytetrafluoroethylene and nitrile rubber, it has excellent elasticity and greatly reduces the maintenance rate. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of the siphon oil return device of the water cutter without oil return port described in this application.

[0013] In the diagram: 11. Crude oil tank; 12. Water cutter; 13. Switch valve; 14. Main pipeline; 2. Siphon pressurization bladder; 21. First bladder shell; 22. Second bladder shell; 23. Siphon inlet; 3. Siphon pipeline; 4. Siphon pressurization port; 5. Elastic diaphragm; 61. Return oil pump; 62. First forced return oil pipe; 63. Second forced return oil pipe. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. At the same time, it should be understood that the specific embodiments described herein are merely used to explain the present utility model and are not intended to limit the present utility model.

[0015] like Figure 1 As shown, this utility model provides a siphon oil return device for a water cutter without an oil return port. The siphon oil return device includes an oil tank 11, a water cutter 12, a siphon pressurizing bladder 2, and a siphon pipeline 3. The oil tank and the water cutter 12 are connected by a main pipeline 14. A switch valve 13 is installed on the main pipeline 14. One end of the siphon pipeline 3 is connected to the main pipeline 14, and the other end is connected to the siphon pressurizing bladder 2. The siphon pressurizing bladder 2 is provided with a siphon pressurizing port 4. An elastic diaphragm 5 is provided inside the siphon pressurizing bladder 2 between the siphon pressurizing port 4 and the siphon pipeline 3.

[0016] In actual operation, when it is not necessary for the oil in the water cutter 12 to flow back into the oil tank, the elastic diaphragm 5 is in a horizontal position (i.e., the elastic diaphragm 5 is in a non-working state). When it is necessary for the oil in the water cutter 12 to flow back into the oil tank (i.e., the elastic diaphragm 5 is in a pressurized state, at which point the oil return begins), this application only needs to input compressed air into the siphon pressurization port 4. This compressed air will cause the middle part of the elastic diaphragm 5 to move downwards to apply pressure to the siphon pipe 3, thereby allowing the oil in the water cutter 12 to flow back into the oil tank. At this time, the elastic diaphragm 5 is in a downward-bent arc state. After the oil in the water cutter 12 has flowed back into the oil tank (i.e., the elastic diaphragm 5 is in a pressurized state, at which point the oil return is completed), the input of compressed air is stopped. At this time, the water in the water cutter 12 will automatically return to its original position, and the elastic diaphragm 5 will automatically return to the horizontal position.

[0017] The siphon pressurization bladder 2 includes a first shell 21 and a second shell 22. The siphon pressurization port 4 is disposed on the first shell 21. The siphon pipe 3 is connected to the interior of the second shell 22. The elastic diaphragm 5 is located between the first shell 21 and the second shell 22. Thus, this application achieves the structural arrangement of the siphon pressurization bladder 2. Under the action of the elastic diaphragm 5, this application has good leak-proof performance.

[0018] The elastic diaphragm 5 includes a polytetrafluoroethylene (PTFE) layer 51 disposed on the top of the second bladder shell 22 and a nitrile rubber layer 52 adhered to the PTFE layer 51. The PTFE layer 51 can be used to contact the oil in the water cutter 12, and the nitrile rubber layer 52 has a certain elasticity and can automatically rebound. Thus, when no compressed air is added to the siphon pressure bladder 2, the nitrile rubber layer 52 can restore the PTFE layer 51, thereby allowing the elastic diaphragm 5 to automatically return to a horizontal position.

[0019] There are two siphon pressurizing bladders 2, each of which is connected to the main pipeline 14 via a siphon pipe 3. This application has two sets of siphon pressurizing bladders 2. If the stroke of one set of siphon pressurizing bladders 2 is insufficient, the other siphon pressurizing bladder 2 can pressurize the siphon pipe 3 again, thereby allowing all the oil in the water cutter 12 to flow back into the oil tank.

[0020] This application also includes a return oil pump 61, one end of which is connected to the water cutter 12, and the other end is connected to the main pipeline 14 via a first forced return oil pipe 62. The outlet of the first forced return oil pipe 62 is located between the siphon pipeline 3 and the water cutter 12. Thus, when the distance between the oil tank and the water cutter 12 is relatively large, resulting in a long main pipeline 14 or many bends in the main pipeline 14, this application can use the siphon pressure bladder 2 to allow the oil in the water cutter 12 to flow back into the oil tank.

[0021] Preferably, the connection between the siphon pipe 3 and the main pipe 14 is a siphon port 23, and the outlet of the first forced return oil pipe 62 is located near the siphon port 23. Furthermore, the return oil pump 61 is also connected to the siphon pressurization port 4 on the siphon pressurization bladder 2 via a second forced return oil pipe 63. In this way, this application can more conveniently allow the oil in the water cutter 12 to flow back into the oil tank through the siphon pressurization bladder 2.

[0022] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A siphon oil return device with a water cutter without an oil return port, comprising an oil tank (11) and a water cutter (12), wherein the oil tank and the water cutter (12) are connected by a main pipeline (14), characterized in that: It also includes a siphon tube (3), one end of which is connected to the main tube (14), and the other end is connected to a siphon pressurizing bladder (2). The siphon pressurizing bladder (2) is provided with a siphon pressurizing port (4), and an elastic diaphragm (5) is provided inside the siphon pressurizing bladder (2) between the siphon pressurizing port (4) and the siphon tube (3).

2. The siphon oil return device for a water cutter without an oil return port according to claim 1, characterized in that: The siphon pressurization bladder (2) includes a first bladder shell (21) and a second bladder shell (22). The siphon pressurization port (4) is disposed on the first bladder shell (21). The siphon tube (3) is connected to the interior of the second bladder shell (22). The elastic diaphragm (5) is located between the first bladder shell (21) and the second bladder shell (22).

3. The siphon oil return device for a water cutter without an oil return port according to claim 2, characterized in that: The elastic diaphragm (5) includes a polytetrafluoroethylene layer (51) disposed on the top of the second shell (22) and a nitrile rubber layer (52) adhered to the polytetrafluoroethylene layer (51).

4. The siphon oil return device for a water cutter without an oil return port according to claim 3, characterized in that: There are two siphon pressurization bladders (2), and each siphon pressurization bladder (2) is connected to the main pipeline (14) through a siphon pipeline (3).

5. The siphon oil return device for a water cutter without an oil return port according to any one of claims 1 to 4, characterized in that: It also includes a return oil pump (61), one end of which is connected to the water cutter (12), and the other end is connected to the main pipeline (14) through the first forced return oil pipe (62). The outlet of the first forced return oil pipe (62) is located between the siphon pipeline (3) and the water cutter (12).

6. The siphon oil return device for a water cutter without an oil return port according to claim 5, characterized in that: The connection between the siphon pipe (3) and the main pipe (14) is the siphon pipe opening (23), and the outlet of the first forced return oil pipe (62) is located near the siphon pipe opening (23).

7. The siphon oil return device for a water cutter without an oil return port according to claim 5, characterized in that: The return oil pump (61) is also connected to the siphon pressurization port (4) on the siphon pressurization bladder (2) via the second forced return oil pipe (63).

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