Connecting structure for preventing oil leakage at joint of delivery pump

Abstract

The invention belongs to the technical field of flange leakage-proof devices, and particularly relates to a connecting structure for preventing oil leakage at the joint of a delivery pump, which comprises an interface sealing ring and a flange leakage-proof cover, the interface sealing ring is arranged at the flange connecting position of the delivery pump, a first cavity is formed between the interface sealing ring and the flange connecting position, a plurality of inclined holes communicated with the first cavity are formed in the interface sealing ring, and the inclined holes are formed upwards in an inclined mode. A liquid guide groove is formed in the outer surface of the interface sealing ring; an air blowing hole and an air blowing pipe are arranged on the upper portion of the interface sealing ring, the air blowing pipe is communicated with the first cavity through the air blowing hole, and a first one-way valve is arranged in the air blowing pipe; a liquid outlet hole is formed in the bottom of the interface sealing ring; through double protection of the interface sealing ring and the flange leakage-proof cover, leaked liquid is gathered in the first cavity and the second cavity and is prevented from flowing to the outer end face of the flange and the bolt, and the problem of oil leakage is effectively solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of flange leak prevention devices, and particularly relates to a connection structure for preventing oil leakage at the connection of a transfer pump. Background Art

[0002] In industrial production, oil leakage often occurs at the flange connection of a transfer pump due to reasons such as poor sealing and loose bolts. Oil leakage not only causes waste of resources but may also lead to environmental pollution, equipment failures and other problems. Traditional solutions usually involve adding a sealing gasket at the flange connection or regularly checking the tightness of the bolts, but these methods cannot completely prevent oil leakage. In addition, when oil leakage occurs at the flange connection, the leaked liquid often flows to the connection bolts, causing the bolts to be covered with oil stains, which affects subsequent maintenance work.

[0003] At the same time, the flange cover needs to be removed during maintenance, which brings inconvenience to checking the bolt torque and tightening the bolts. Therefore, there is an urgent need for a new connection structure that can effectively prevent oil leakage at the flange connection of the transfer pump and is convenient for maintenance. Summary of the Invention

[0004] In view of the above technical problems, the present invention provides a connection structure for preventing oil leakage at the connection of a transfer pump, which can prevent the leaked liquid from flowing to the outer end face of the flange and the bolts, and can avoid the residual liquid to the greatest extent during maintenance.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is as follows: A connection structure for preventing oil leakage at the connection of a transfer pump, comprising an interface sealing ring and a flange leak prevention cover; the interface sealing ring is arranged at the flange connection of the transfer pump, a first chamber is formed between the interface sealing ring and the flange connection, and a plurality of inclined holes communicating with the first chamber are arranged on the interface sealing ring, and the inclined holes are arranged obliquely upward; a liquid guiding groove is arranged on the outer surface of the interface sealing ring; an air blowing hole and an air blowing pipe are arranged on the upper part of the interface sealing ring, the air blowing pipe communicates with the first chamber through the air blowing hole, and a first one-way valve is arranged in the air blowing pipe; a liquid outlet hole is arranged at the bottom of the interface sealing ring; The flange leak prevention cover covers the outside of the interface sealing ring; two partition plates are arranged at intervals in the flange leak prevention cover; a second chamber is formed between the two partition plates and the interface sealing ring, and the flange leak prevention cover is divided into a left chamber and a right chamber by the partition plates and the flange, and the bolt head and nut of the flange connection of the transfer pump are respectively located in the left chamber and the right chamber; a liquid outlet pipe communicating with the second chamber is fixed at the lower part of the flange leak prevention cover.

[0006] A communication hole is arranged at the lower part of the partition plate, and the left chamber and the right chamber communicate with the second chamber through the corresponding communication holes respectively.

[0007] Both sides of the flange leak-proof cover are rotatably connected with inspection plates, and inspection openings are provided on the inspection plates, and a sealing member is fixedly connected at the inspection openings.

[0008] The material of the sealing member is rubber, and the end of the sealing member is a flat mouth, which is in a closed state under normal conditions.

[0009] The interface sealing ring is composed of two half rings, and the two half rings are magnetically connected.

[0010] The flange leak-proof cover is composed of two C-shaped covers; the two C-shaped covers are connected by bolts; both of the two half rings are provided with wedge-shaped blocks, and corresponding connecting blocks are provided in the C-shaped covers, and wedge-shaped grooves are provided on the connecting blocks.

[0011] It further includes a gas-liquid separation tank, a rotating shaft is arranged in the gas-liquid separation tank, and the rotating shaft is connected with a driving motor; a partition plate is slidably connected to the rotating shaft, a wire mesh demister is fixedly connected to the lower part of the partition plate, and the partition plate can be driven to rotate by the rotating shaft; an inlet pipe and a first drain pipe are communicated with the bottom of the gas-liquid separation tank, and an outlet pipe is arranged at the top of the gas-liquid separation tank; a cover body is detachably connected to the gas-liquid separation tank.

[0012] A limiting ring is rotatably connected to the rotating shaft, and the limiting ring is fixedly connected to the gas-liquid separation tank through a connecting plate; the partition plate is limited by the limiting ring, and after limiting, the gas-liquid separation tank is divided into an upper cavity and a lower cavity by the partition plate, and a second drain pipe communicated with the upper cavity is arranged on the gas-liquid separation tank.

[0013] A sealing ring is fixed on the partition plate, a gas collecting groove is arranged on the side surface of the partition plate, a plurality of air holes communicated with the gas collecting groove are arranged on the partition plate, and the outlet pipe is communicated with the gas collecting groove; a flushing pipe is communicated with the outlet pipe, and a second one-way valve is arranged on the flushing pipe.

[0014] A fixing ring is fixedly connected to the top of the rotating shaft, and the fixing ring is connected with the partition plate through a connecting rod assembly; a drain hole is arranged on the partition plate, a baffle is slidably connected to the partition plate, and an opening is arranged on the baffle; the baffle and the connecting rod assembly are linked through a gear transmission mechanism.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the double protection of the interface sealing ring and the flange leak-proof cover, the leaked liquid is gathered in the first chamber and the second chamber, preventing it from flowing to the outer end face of the flange and the bolts, effectively solving the problem of oil leakage. During maintenance, compressed air is blown into the first chamber through a blow pipe to blow out the residual liquid, and the liquid is separated and discharged through the gas-liquid separation tank, avoiding the residual of oil liquid to the greatest extent, ensuring the cleanliness of the maintenance environment, and at the same time facilitating the subsequent equipment maintenance and repair.

[0016] The inclined holes can play a certain blocking role to prevent the leaked liquid from spraying out directly; the liquid flowing out through the inclined holes falls along the liquid guide groove on the outer surface of the interface sealing ring. A communication hole is provided at the lower part of the partition plate, which can introduce the condensed water into the second chamber and discharge it, avoiding the accumulation of condensed water caused by temperature difference and further improving the reliability of the equipment.

[0017] The flange connection bolts are respectively located in the left chamber and the right chamber, isolated from the chamber where the leaked liquid is located, avoiding the entire flange surface being soiled due to local leakage and ensuring the smooth progress of maintenance work. At the same time, inspection plates are provided on both sides of the flange leak-proof cover. During maintenance, the inspection port can be made to face the bolt position by rotating the inspection plate to perform torque inspection or tighten the bolts, without removing the flange leak-proof cover, greatly improving the maintenance efficiency.

[0018] The interface sealing ring is composed of two half-rings, and the flange leak-proof cover is composed of two C-shaped covers. It is quickly installed through magnetic attraction and bolt connection, and the half-rings can be pressed and fixed during the installation process.

[0019] Through the setting of the gas-liquid separation tank, the gas-liquid mixture blown out during maintenance is separated. The gas is discharged through the outlet pipe, and the liquid is discharged through the drain pipe, avoiding environmental pollution caused by the gas-liquid mixture. The upper cavity of the gas-liquid separation tank is used to clean the interface sealing ring and the flange leak-proof cover, and the cleaned components can be recycled, reducing the equipment maintenance cost.

[0020] The setting of the partition plate divides the gas-liquid separation tank into an upper cavity and a lower cavity. The sewage generated at the beginning when cleaning the components is discharged through the second drain pipe and will not flow to the wire mesh demister, thus protecting the wire mesh demister from sewage pollution and extending its service life. Description of the Drawings

[0021] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is a half-sectional view of the present invention in one direction; Figure 3 is a half-sectional view of the present invention in another direction; Figure 4 is a partial sectional view of the present invention; Figure 5 is the structural schematic diagram of the interface sealing ring of the present invention; Figure 6 is the sectional view of the flange leak-proof cover of the present invention; Figure 7 is the connection structural schematic diagram of the wedge block and the connecting block of the present invention; Figure 8 is the structural schematic diagram of the gas-liquid separation tank of the present invention; Figure 9It is a schematic diagram of the internal structure of the gas-liquid separation tank of the present invention in one direction; Figure 10 It is a schematic diagram of the internal structure of the gas-liquid separation tank of the present invention in another direction; Figure 11 It is a schematic diagram of the structure between the connecting rod assembly and the baffle of the present invention; Figure 12 It is a schematic diagram of the structure at the liquid discharge hole of the present invention; Figure 13 It is a partial cross-sectional view of the partition plate of the present invention; Among them: 1 is an interface sealing ring, 100 is a liquid outlet hole, 2 is a flange leak-proof cover, 3 is a transfer pump, 4 is a flange, 5 is a first chamber, 6 is an inclined hole, 7 is a liquid guide groove, 8 is a gas blowing hole 8, 9 is a gas blowing pipe, 10 is a first one-way valve, 11 is a partition plate, 12 is a second chamber, 13 is a left chamber, 14 is a right chamber, 15 is a liquid outlet pipe, 16 is a communication hole, 17 is an inspection plate, 18 is an inspection opening, 19 is a sealing member, 20 is a semi-ring, 21 is a C-shaped cover, 22 is a wedge-shaped block, 23 is a connecting block, 230 is a wedge-shaped groove, 24 is a gas-liquid separation tank, 25 is a rotating shaft, 26 is a driving motor, 27 is a wire mesh demister, 28 is an inlet pipe, 29 is an outlet pipe, 30 is a limit ring, 31 is a connecting plate, 32 is an upper cavity, 33 is a lower cavity, 34 is a first liquid discharge pipe, 35 is a sealing ring, 36 is a gas collecting groove, 37 is a gas hole, 38 is a flushing pipe, 39 is a second one-way valve, 40 is a fixing ring, 41 is a connecting rod assembly, 42 is a liquid discharge hole, 43 is a baffle, 430 is an opening, 44 is a gear, 45 is a rack, 46 is a second liquid discharge pipe, 47 is a cover body, 48 is a partition plate. Specific embodiments

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] As Figures 1-7 shown, a connection structure for preventing oil leakage at the connection of a transfer pump includes an interface sealing ring 1 and a flange leak-proof cover 2. The interface sealing ring 1 is sleeved on the connection of the flange 4 of the transfer pump 3, and a first chamber 5 is formed between the connection of the interface sealing ring 1 and the flange 4. The liquid leaked from the connection of the flange 4 can flow into the first chamber 5 to prevent it from flowing to the outer end face of the flange 4 and the bolts.

[0024] The interface sealing ring 1 is provided with a plurality of inclined holes 6 communicating with the first chamber 5, and the inclined holes 6 are arranged obliquely upward; the purpose of the inclined holes 6 is to play a certain blocking role to prevent the leaked liquid from spraying out directly; the liquid flowing out through the inclined holes 6 falls along the liquid guide groove 7 on the outer surface of the interface sealing ring 1.

[0025] An air blowing hole 8 and an air blowing pipe 9 are provided at the upper part of the interface closed loop 1. The air blowing pipe 9 is communicated with the first chamber 5 through the air blowing hole 8, and a first one-way valve 10 is arranged in the air blowing pipe 9. The air blowing pipe 9 is connected to an air source; during maintenance, compressed air is sprayed into the first chamber 5 through the air blowing pipe 9, the first one-way valve 10 and the air blowing hole 8, and the residual liquid in the first chamber 5 is blown out, so as to avoid affecting the maintenance of the flange 4 due to the residual liquid.

[0026] The flange leak-proof cover 2 covers the outside of the interface closed loop 1, and one end of the air blowing pipe 9 can pass through the flange leak-proof cover 2 and extend out. Two partition plates 11 are arranged at intervals in the flange leak-proof cover 2; a second chamber 12 is formed between the two partition plates 11 and the interface closed loop 1. A liquid outlet hole 100 is arranged at the bottom of the interface closed loop 1, and the liquid in the first chamber 5 can flow into the second chamber 12 through the liquid outlet hole 100.

[0027] The flange leak-proof cover 2 is divided into a left chamber 13 and a right chamber 14 by the partition plates 11 and the flange 4, and the bolt heads and nuts connected to the flange 4 of the transfer pump 3 are respectively located in the left chamber 13 and the right chamber 14. A liquid outlet pipe 15 communicated with the second chamber 12 is fixed at the lower part of the flange leak-proof cover 2. It is possible to judge whether leakage occurs by observing whether there is liquid in the liquid outlet pipe 15.

[0028] When a large amount of liquid (spray) leaks at the connection of the flange 4, the leaked liquid is blocked by the inclined hole 6, part of the liquid falls into the second chamber 12 through the liquid guiding groove 7, and part of the liquid flows into the second chamber 12 through the liquid outlet hole 100; the liquid in the second chamber 12 is discharged through the liquid outlet pipe 15. On the contrary, when a small amount of liquid leaks at the connection of the flange 4, the leaked liquid is in a dripping state, and it flows into the second chamber 12 through the liquid outlet hole 100 and is finally discharged through the liquid outlet pipe 15.

[0029] Through the above structural arrangement, the liquid leaked at the connection of the flange 4 is converged in the first chamber 5, and the connection bolts (bolt heads and nuts) of the flange 4 are respectively located in the left chamber 13 and the right chamber 14; that is, three parts of the structure are formed. This kind of structure can effectively prevent the leaked liquid at the connection from flowing to the connection bolts, playing a role of partition isolation. It prevents the overall surface of the flange 4 from being soiled by liquid due to leakage at a certain position, affecting the maintenance.

[0030] Furthermore, in order to prevent condensed water from existing in the flange leak-proof cover 2 due to temperature difference; a communication hole 16 is arranged at the lower part of the partition plate 11, and the left chamber 13 and the right chamber 14 are respectively communicated with the second chamber 12 through the corresponding communication holes 16. The condensed water flows into the second chamber 12 through the communication holes 16 and is discharged through the liquid outlet pipe 15.

[0031] Furthermore, one of the reasons for the leakage of flange 4 is that the bolts are not tightened properly. However, with the common structural design of flange covers, it is necessary to remove the flange cover when checking the bolt torque or tightening the bolts, which is rather inconvenient. On both sides of the flange leak-proof cover 2, inspection plates 17 are rotatably connected, and inspection openings 18 are provided on the inspection plates 17. During maintenance, by rotating the inspection plate 17, the inspection opening 18 can be aligned with the bolt position for torque inspection. A sealing member 19 is fixedly connected at the inspection opening 18. Through the blocking effect of the sealing member 19, when inspection is not being carried out, the inside of the flange leak-proof cover 2 is in a relatively enclosed environment.

[0032] Furthermore, the sealing member 19 is made of rubber, and the end of the sealing member 19 is a flat opening, which is in a closed state under normal conditions. When a torque detection tool or wrench is inserted, the flat opening will be forced to open under the action of external force, allowing the torque inspection tool or wrench to enter the flange leak-proof cover 2 through the sealing member 19.

[0033] Furthermore, the interface sealing ring 1 is composed of two half-rings 20. The two half-rings 20 are magnetically connected to form a complete circular ring after magnetic attraction.

[0034] The flange leak-proof cover 2 is composed of two C-shaped covers 21; the two C-shaped covers 21 are connected by bolts, and a gasket can be specifically provided between the two C-shaped covers 21. Wedge-shaped blocks 22 are provided on both half-rings 20, and corresponding connecting blocks 23 are provided inside the C-shaped covers 21. Wedge-shaped grooves 230 are provided on the connecting blocks 23. Specifically, magnets are provided on the wedge-shaped blocks 22, and the magnetic poles between two opposite wedge-shaped blocks 22 are opposite.

[0035] During installation, after magnetically connecting the two half-rings 20 at the connection of the flange 4; during the process of opposing and bolt-connecting the two C-shaped covers 21, the wedge-shaped blocks 22 extend into the wedge-shaped grooves 230 on the connecting blocks 23. Through the cooperation of the wedge-shaped grooves 230 and the wedge-shaped blocks 22, the two half-rings 20 are pressed and fixed. That is, while tightening the bolts of the flange leak-proof cover 2, the two half-rings 20 can be fixed.

[0036] Furthermore, during maintenance, the gas carries the leaked liquid out, forming a gas-liquid mixture. Therefore, as Figures 8-13 shown, a gas-liquid separation tank 24 is also provided. A rotating shaft 25 is provided inside the gas-liquid separation tank 24. The rotating shaft 25 is connected to a driving motor 26. The housing of the driving motor 26 is fixedly connected to the gas-liquid separation tank 24, and the output shaft of the driving motor 26 passes through the gas-liquid separation tank 24 and is fixedly connected to the rotating shaft 25. A partition plate 48 is slidably connected to the rotating shaft 25. A wire mesh demister 27 is fixedly connected to the lower part of the partition plate 48. The partition plate 48 can be driven to rotate by the rotating shaft 25. The rotating shaft 25 is a non-circular shaft, such as a square shaft or an elliptical shaft.

[0037] The bottom of the gas-liquid separation tank 24 is connected to an inlet pipe 28 and a first drain pipe 34 (both are provided with corresponding valves), and the liquid outlet pipe 15 is connected to the inlet pipe 28. The gas-liquid separation tank 24 can be connected to multiple liquid outlet pipes 15.

[0038] The gas-liquid mixture is blown into the gas-liquid separation tank 24 through the liquid outlet pipe 15 and the inlet pipe 28. The gas-liquid mixture is separated by a wire mesh demister 27. The gas will be discharged through an outlet pipe 29 provided at the top of the gas-liquid separation tank 24, and the liquid will gather at the bottom of the gas-liquid separation tank 24 and can be discharged through the drain pipe 34. A cover body 47 is detachably connected to the gas-liquid separation tank 24.

[0039] A limiting ring 30 is rotatably connected to the rotating shaft 25, and the limiting ring 30 is fixedly connected to the gas-liquid separation tank 24 through a connecting plate 31; the partition plate 48 is limited by the limiting ring 30. After the partition plate 48 is lowered and limited, the gas-liquid separation tank 24 is divided into an upper cavity 32 and a lower cavity 33 by the partition plate 48; a second drain pipe 46 communicating with the upper cavity 32 is provided on the gas-liquid separation tank 24. A flushing pipe 38 is connected to the outlet pipe 29, and a second one-way valve 39 is provided on the flushing pipe 38.

[0040] When the interface sealing ring 1 and the flange leak-proof cover 2 are damaged, the cover body 47 is opened, and after the two are combined (that is, the flange leak-proof cover 2 is connected by bolts and the interface sealing ring 1 is located inside the flange leak-proof cover 2), they are placed into the upper cavity 32; then the cover body 47 is closed, and then the driving motor 26 is started to drive the partition plate 48 and the interface sealing ring 1 and the flange leak-proof cover 2 to rotate. The cleaning water is sprayed into the gas-liquid separation tank 24 through the flushing pipe 38 and the second one-way valve 39 in sequence to clean the interface sealing ring 1 and the flange leak-proof cover 2; the sewage generated during the cleaning process is discharged through the second drain pipe 46.

[0041] Specifically: during the above rotation process, in order to prevent the end of the flange leak-proof cover 2 from rubbing against the cover body 47; a bearing or a ball and other structures can be provided on the cover body 47 to contact the end of the upper end of the flange leak-proof cover 2. The end of the lower end of the flange leak-proof cover 2 is in direct contact with the partition plate 48, and through the frictional force between the two, the partition plate 48 drives the end of the flange leak-proof cover 2 to rotate with the cover body 47.

[0042] Through the above structural setting of the partition, while realizing the cleaning of the interface sealing ring 1 and the flange leak-proof cover 2, it can effectively prevent the sewage generated in the initial cleaning stage from flowing to the wire mesh demister 27, playing a protective role. And it can realize the cleaning of the interface sealing ring 1 and the flange leak-proof cover 2, achieving the purpose of recycling.

[0043] Furthermore, a sealing ring 35 is fixed on the partition plate 48, which can improve the seal between the partition plate 48 and the inner wall of the gas-liquid separation tank 24. A gas collecting groove 36 is provided on the side surface of the partition plate 48, and a number of air holes 37 communicating with the gas collecting groove 36 are provided on the partition plate 48. The outlet pipe 29 communicates with the gas collecting groove 36. When the partition plate 48 is located above, the gas separated from the gas-liquid mixture by the wire mesh demister 27 enters the gas collecting groove 36 through the air holes 37 and then is discharged through the outlet pipe 29. Through this structure, the liquid in the gas can be blocked again.

[0044] Meanwhile, when the interface sealing ring 1 and the flange leak-proof cover 2 are cleaned; the partition plate 48 moves upward to connect the gas collecting groove 36 with the outlet pipe 29. The cleaning water is sprayed into the gas-liquid separation tank 24 through the flushing pipe 38, the second one-way valve 39, the gas collecting groove 36 and the air holes 37 in sequence. Since there are a number of air holes 37, the wire mesh demister 27 can be cleaned in multiple directions, so the driving motor 26 does not need to be started during the cleaning process.

[0045] Furthermore, a fixing ring 40 is fixedly connected to the top of the rotating shaft 25, and the fixing ring 40 is connected to the partition plate 48 through a connecting rod assembly 41. The connecting rod assembly 41 includes two sequentially hinged connecting rods. The ends of the two connecting rods are respectively hinged to the fixing ring 40 and the partition plate 48 through hinge shafts, and a torsion spring is provided at the hinge between the two connecting rods. Multiple connecting rod assemblies 41 can be provided.

[0046] During cleaning, the partition plate 48 is pressed downward to increase the angle between the two connecting rods, and the torsion spring generates elastic potential energy; then the interface sealing ring 1 and the flange leak-proof cover 2 are combined and placed into the upper cavity 32. After cleaning, the interface sealing ring 1 and the flange leak-proof cover 2 are taken out; the torsion spring releases the elastic potential energy to realize the upward reset of the partition plate 48.

[0047] Furthermore, after cleaning the interface sealing ring 1 and the flange leak-proof cover 2, in order to prevent the residual cleaning water; a drain hole 42 is provided on the partition plate 48, a baffle 43 is slidably connected to the partition plate 48, and an opening 430 is provided on the baffle 43; the baffle 43 is linked with the connecting rod assembly through a gear transmission mechanism.

[0048] When the partition plate 48 moves downward, the connecting rod assembly drives the baffle 43 to move through the gear transmission mechanism, and the drain hole 42 is blocked by the baffle 43. The sewage generated during the cleaning process is discharged through the second drain pipe 46. When the partition plate 48 moves upward, the connecting rod assembly drives the baffle 43 to move in the reverse direction through the gear transmission mechanism, and the opening 430 on the baffle 43 is opposite to the drain hole 42, and the residual cleaning water falls into the bottom of the gas-liquid separation tank 24 through the opening 430 and the drain hole 42. Since the residual cleaning water is the water generated during the last cleaning process and is relatively clean, it will not pollute the wire mesh demister 27.

[0049] The gear transmission mechanism specifically includes a gear 44 and a rack 45. The gear 44 is fixedly connected to the hinge shaft at the end of the lower connecting rod; the rack 45 is fixedly connected to the baffle 43 and meshes with the gear 44. Since the hinge shaft is fixedly connected to the connecting rod and the hinge shaft is hinged to the partition plate 48. Therefore, when the partition plate 48 moves up and down, the hinge shaft will drive the corresponding rotation of the gear 44, and then drive the baffle 43 to move through meshing with the rack 45.

[0050] Only the preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above embodiments.

Claims

1. A connection structure for preventing oil leakage at the connection of a delivery pump, characterized in that: The invention comprises an interface sealing ring (1) and a flange leakproof cover (2); the interface sealing ring (1) is arranged at the connection of the flange (4) of the delivery pump (3); a first chamber (5) is formed between the connection of the interface sealing ring (1) and the flange (4); a plurality of inclined holes (6) communicating with the first chamber (5) are arranged on the interface sealing ring (1); the inclined holes (6) are arranged obliquely upward; a liquid guide groove (7) is arranged on the outer surface of the interface sealing ring (1); a blowing hole (8) and a blowing pipe (9) are arranged on the upper part of the interface sealing ring (1); the blowing pipe (9) is communicated with the first chamber (5) through the blowing hole (8); a first one-way valve (10) is arranged in the blowing pipe (9); a liquid outlet hole (100) is arranged at the bottom of the interface sealing ring (1); The flange leakproof cover (2) is arranged on the outside of the interface closed ring (1); two partition plates (11) are arranged at intervals in the flange leakproof cover (2); a second chamber (12) is formed between the two partition plates (11) and the interface closed ring (1); the flange leakproof cover (2) is divided into a left chamber (13) and a right chamber (14) by the partition plates (11) and the flange (4); the bolt heads and nuts connected to the flange (4) of the delivery pump (3) are respectively located in the left chamber (13) and the right chamber (14); and a liquid outlet pipe (15) communicating with the second chamber (12) is fixed at the lower part of the flange leakproof cover (2).

2. A connection structure for preventing oil leakage at a connection of a delivery pump according to claim 1, characterized in that: A communication hole (16) is provided at the lower portion of the partition plate (11), and the left chamber (13) and the right chamber (14) are respectively connected to the second chamber (12) through the corresponding communication holes (16).

3. A connection structure for preventing oil leakage at a connection of a delivery pump according to claim 1, characterized in that: Both sides of the flange leakproof cover (2) are rotatably connected to an inspection plate (17), the inspection plate (17) is provided with an inspection opening (18), and a blocking member (19) is fixedly connected to the inspection opening (18).

4. A connection structure for preventing oil leakage at a connection of a delivery pump according to claim 3, characterized in that: The material of the blocking piece (19) is rubber, and the end of the blocking piece (19) is a flat mouth, which is in a closed state under normal conditions.

5. A connection structure for preventing oil leakage at a connection of a delivery pump according to claim 1, characterized in that: The interface closed ring (1) is composed of two half rings (20), and the two half rings (20) are connected by magnetic attraction.

6. A connection structure for preventing oil leakage at a connection of a delivery pump according to claim 5, characterized in that: The flange leakproof cover (2) is composed of two C-shaped covers (21); the two C-shaped covers (21) are connected by bolts; the two half rings (20) are each provided with a wedge block (22), a corresponding connecting block (23) is provided inside the C-shaped cover (21), and a wedge groove (230) is provided on the connecting block (23).

7. A connection structure for preventing oil leakage at a connection of a delivery pump according to claim 1, characterized in that: The invention also comprises a gas-liquid separation tank (24), wherein a rotating shaft (25) is provided in the gas-liquid separation tank (24), and the rotating shaft (25) is connected to a driving motor (26); a partition plate (48) is slidably connected to the rotating shaft (25), and a wire mesh demister (27) is fixedly connected to the lower part of the partition plate (48), and the partition plate (48) can be driven to rotate by the rotating shaft (25); the bottom of the gas-liquid separation tank (24) is connected to an inlet pipe (28) and a first liquid discharge pipe (34), and the top of the gas-liquid separation tank (24) is provided with an outlet pipe (29); and a cover body (47) is detachably connected to the gas-liquid separation tank (24).

8. A connection structure for preventing oil leakage at a connection of a delivery pump according to claim 7, characterized in that: A limit ring (30) is rotatably connected to the rotating shaft (25), and the limit ring (30) is fixedly connected to the gas-liquid separation tank (24) via a connecting plate (31); the partition plate (48) is limited by the limit ring (30), and after the limit is achieved, the gas-liquid separation tank (24) is divided into an upper cavity (32) and a lower cavity (33) by the partition plate (48); and a second liquid discharge pipe (46) communicating with the upper cavity (32) is provided on the gas-liquid separation tank (24).

9. A connection structure for preventing oil leakage at a connection of a delivery pump according to claim 7, characterized in that: A sealing ring (35) is fixed to the partition plate (48); a gas collecting groove (36) is provided on the side of the partition plate (48); a plurality of air holes (37) connected to the gas collecting groove (36) are provided on the partition plate (48); the outlet pipe (29) is connected to the gas collecting groove (36); a flushing pipe (38) is connected to the outlet pipe (29); and a second one-way valve (39) is provided on the flushing pipe (38).

10. A connection structure for preventing oil leakage at a connection of a delivery pump according to claim 7, characterized in that: A fixing ring (40) is fixedly connected to the top of the rotating shaft (25), and the fixing ring (40) is connected to the partition plate (48) via a connecting rod assembly (41); a drainage hole (42) is provided on the partition plate (48), and a baffle (43) is slidably connected to the partition plate (48), and an opening (430) is provided on the baffle plate (43); the baffle plate (43) and the connecting rod assembly (41) are linked via a gear transmission mechanism.

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