A connection structure for preventing oil leakage at a connection point of a delivery pump

Abstract

The present invention belongs to the technical field of flange leakage prevention devices, and specifically relates to a connection structure for preventing oil leakage at a connection of a delivery pump, comprising an interface sealing ring and a flange leakage prevention cover; the interface sealing ring is arranged at the flange connection of the delivery pump, and a first chamber is formed between the interface sealing ring and the flange connection, and the interface sealing ring is provided with a plurality of inclined holes connected to the first chamber, and the inclined holes are arranged inclined upward; the outer surface of the interface sealing ring is provided with a liquid guide groove; the upper part of the interface sealing ring is provided with a blowing hole and a blowing pipe, the blowing pipe is connected to the first chamber through the blowing hole, and a first one-way valve is provided in the blowing pipe; the bottom of the interface sealing ring is provided with a liquid outlet; through the dual protection of the interface sealing ring and the flange leakage prevention cover, the leaked liquid is gathered in the first chamber and the second chamber to prevent it from flowing to the outer end face of the flange and the bolts, thereby effectively solving the oil leakage problem.

Description

Technical Field

[0001] The invention belongs to the technical field of flange leakage prevention devices, and in particular relates to a connection structure that prevents oil leakage at a connection point of a delivery pump. Background Art

[0002] In industrial production, oil leaks often occur at the flange joints of pumps due to poor sealing or loose bolts. These leaks not only waste resources but can also cause environmental pollution and equipment failure. Traditional solutions typically involve adding sealing gaskets to flange joints or regularly checking bolt tightness, but these methods don't completely eliminate leaks. Furthermore, when oil leaks occur at flange joints, the leaked liquid often flows onto the connecting bolts, coating them with oil and compromising subsequent repairs.

[0003] At the same time, the flange cover needs to be removed during maintenance, which makes it inconvenient to check the bolt torque and tighten 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 delivery pump and facilitate maintenance. Summary of the Invention

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

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A connection structure for preventing oil leakage at a delivery pump connection, comprising an interface sealing ring and a flange leak-proof cover; the interface sealing ring is disposed at the flange connection of the delivery pump, a first chamber is formed between the interface sealing ring and the flange connection, the interface sealing ring is provided with a plurality of inclined holes communicating with the first chamber, the inclined holes being arranged obliquely upward; a liquid guide groove is provided on the outer surface of the interface sealing ring; an air blowing hole and an air blowing pipe are provided on the upper portion of the interface sealing ring, the air blowing pipe being communicated with the first chamber through the air blowing hole, a first one-way valve being provided in the air blowing pipe; a liquid outlet is provided at the bottom of the interface sealing ring;

[0007] The flange leak-proof cover is arranged on the outside of the interface sealing ring; two partition plates are arranged at intervals inside the flange leak-proof cover; a second chamber is formed between the two partition plates and the interface sealing ring, and the flange leak-proof cover is divided into a left chamber and a right chamber by the partition plates and the flange, and the bolt heads and nuts of the flange connection of the delivery pump are respectively located in the left chamber and the right chamber; a liquid outlet pipe connected to the second chamber is fixed to the lower part of the flange leak-proof cover.

[0008] A communicating hole is provided at the lower portion of the partition plate, and the left chamber and the right chamber are respectively communicated with the second chamber through the corresponding communicating holes.

[0009] Both sides of the flange leak-proof cover are rotatably connected with an inspection plate, and the inspection plate is provided with an inspection port, and a blocking piece is fixedly connected to the inspection port.

[0010] The material of the blocking piece is rubber, the end of the blocking piece is a flat mouth, and it is in a closed state under normal state.

[0011] The interface closed ring consists of two half rings, which are connected by magnetic attraction.

[0012] The flange leakproof cover is composed of two C-shaped covers; the two C-shaped covers are connected by bolts; the two half rings are each provided with a wedge block, and a corresponding connecting block is provided in the C-shaped cover, and a wedge groove is provided on the connecting block.

[0013] It also includes a gas-liquid separation tank, which is provided with a rotating shaft, which is connected to a drive motor; a partition plate is slidably connected to the rotating shaft, and a wire mesh demister is fixedly connected to the lower part of the partition plate, which can be driven to rotate by the rotating shaft; the bottom of the gas-liquid separation tank is connected to an inlet pipe and a first liquid discharge pipe, and the top of the gas-liquid separation tank is provided with an outlet pipe; the gas-liquid separation tank is detachably connected to a cover.

[0014] 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 connected to the upper cavity is provided on the gas-liquid separation tank.

[0015] A sealing ring is fixed on the partition plate, an air collecting groove is provided on the side of the partition plate, a plurality of air holes connected to the air collecting groove are provided on the partition plate, and the outlet pipe is connected to the air collecting groove; a flushing pipe is connected to the outlet pipe, and a second one-way valve is provided on the flushing pipe.

[0016] The top of the rotating shaft is fixedly connected with a fixing ring, which is connected to the partition plate through a connecting rod assembly; the partition plate has a drainage hole, and the partition plate is slidably connected with a baffle, which is provided with an opening; the baffle and the connecting rod assembly are linked by a gear transmission mechanism.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The dual protection of the interface sealing ring and the flange leak shield collects leaked liquid in the first and second chambers, preventing it from flowing to the flange outer end face and bolts, effectively solving the oil leakage problem. During maintenance, compressed air is blown into the first chamber through the air blow pipe to blow out the remaining liquid, which is then separated and discharged through the gas-liquid separator tank. This minimizes oil residue, ensures a clean maintenance environment, and facilitates subsequent equipment maintenance and care.

[0019] The inclined hole acts as a barrier, preventing leaked liquid from being ejected directly. Liquid flowing through the inclined hole falls along the liquid guide groove on the outer surface of the interface sealing ring. A connecting hole at the bottom of the partition plate directs condensed water into the second chamber for drainage, preventing condensate accumulation caused by temperature differences and further improving equipment reliability.

[0020] The flange connection bolts are located in the left and right chambers, respectively, isolating them from the chamber containing the leaking liquid. This prevents localized leakage from contaminating the entire flange surface, ensuring smooth maintenance. Furthermore, access panels are installed on both sides of the flange leak shield. During maintenance, the panels can be rotated to align the access ports with the bolts, allowing torque checks and bolt tightening without removing the flange leak shield, greatly improving maintenance efficiency.

[0021] The interface sealing ring consists of two half rings, and the flange leak-proof cover consists of two C-shaped covers. Quick installation is achieved through magnetic attraction and bolt connection. At the same time, the half rings can be pressed and fixed during the installation process.

[0022] The gas-liquid separator tank separates the gas-liquid mixture blown out during maintenance, with the gas discharged through the outlet pipe and the liquid discharged through the drain pipe, preventing environmental pollution from the gas-liquid mixture. The upper chamber of the gas-liquid separator tank is used to clean the interface sealing ring and flange leak shield. The cleaned components can be recycled, reducing equipment maintenance costs.

[0023] The partition plate is set to divide the gas-liquid separation tank into an upper cavity and a lower cavity. The sewage generated when cleaning the components is discharged through the second drain pipe and will not flow into the wire mesh demister, thereby protecting the wire mesh demister from sewage pollution and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a half-sectional view of the present invention in one direction;

[0026] Figure 3 It is a half-section view of another direction of the present invention;

[0027] Figure 4is a partial cross-sectional view of the present invention;

[0028] Figure 5 It is a structural diagram of the interface closed loop of the present invention;

[0029] Figure 6 is a cross-sectional view of the flange leak-proof cover of the present invention;

[0030] Figure 7 This is a schematic diagram of the connection structure between the wedge block and the connecting block of the present invention;

[0031] Figure 8 It is a structural schematic diagram of the gas-liquid separation tank of the present invention;

[0032] Figure 9 This is a schematic diagram of the internal structure of the gas-liquid separation tank of the present invention in one direction;

[0033] Figure 10 This is a schematic diagram of the internal structure of the gas-liquid separation tank of the present invention from another direction;

[0034] Figure 11 It is a schematic diagram of the structure between the connecting rod assembly and the baffle of the present invention;

[0035] Figure 12 It is a structural schematic diagram of the drainage hole of the present invention;

[0036] Figure 13 is a partial cross-sectional view of a partition plate of the present invention;

[0037] Among them: 1 is the interface sealing ring, 100 is the liquid outlet, 2 is the flange leak-proof cover, 3 is the delivery pump, 4 is the flange, 5 is the first chamber, 6 is the inclined hole, 7 is the liquid guide groove, 8 is the air hole 8, 9 is the air blow pipe, 10 is the first one-way valve, 11 is the partition plate, 12 is the second chamber, 13 is the left chamber, 14 is the right chamber, 15 is the liquid outlet pipe, 16 is the connecting hole, 17 is the inspection plate, 18 is the inspection port, 19 is the blocking piece, 20 is the half ring, 21 is the C-shaped cover, 22 is the wedge block, 23 is the connecting block, 230 is the wedge groove,

[0038] 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 limiting ring, 31 is a connecting plate, 32 is an upper cavity, 33 is a lower cavity, 34 is a first drain pipe, 35 is a sealing ring, 36 is an air collecting tank, 37 is an air 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 drain hole, 43 is a baffle, 430 is an opening, 44 is a gear, 45 is a rack, 46 is a second drain pipe, 47 is a cover body, and 48 is a partition plate. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] like Figure 1-7 As shown, a connection structure for preventing oil leakage at a delivery pump connection includes an interface sealing ring 1 and a flange leak shield 2. The interface sealing ring 1 is sleeved over the flange 4 connection of the delivery pump 3. A first chamber 5 is formed between the interface sealing ring 1 and the flange 4 connection. Liquid leaking from the flange 4 connection can flow into the first chamber 5 and is prevented from flowing to the outer end surface of the flange 4 and the bolts.

[0041] The interface sealing ring 1 is provided with several inclined holes 6 connected to the first chamber 5, and the inclined holes 6 are arranged to be inclined upward; the purpose of the inclined holes 6 is to play a certain blocking role to prevent the leaked liquid from being directly sprayed out; 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.

[0042] An air hole 8 and an air pipe 9 are provided at the top of the interface sealing ring 1. The air pipe 9 communicates with the first chamber 5 through the air hole 8 and is provided with a first one-way valve 10. The air pipe 9 is connected to an air source. During maintenance, compressed air is sprayed into the first chamber 5 through the air pipe 9, the first one-way valve 10, and the air hole 8 to blow out any remaining liquid in the first chamber 5, preventing the residual liquid from interfering with maintenance of the flange 4.

[0043] A flange leak shield 2 is positioned outside the interface sealing ring 1, through which one end of the air blowing tube 9 can extend. Two partition plates 11 are spaced apart within the flange leak shield 2; a second chamber 12 is formed between the two partition plates 11 and the interface sealing ring 1. A liquid outlet 100 is provided at the bottom of the interface sealing ring 1, allowing liquid in the first chamber 5 to flow into the second chamber 12.

[0044] The flange leak shield 2 is divided into a left chamber 13 and a right chamber 14 by a partition plate 11 and a flange 4. The bolt heads and nuts connecting the flange 4 of the delivery pump 3 are located in the left chamber 13 and the right chamber 14, respectively. A liquid outlet pipe 15 connected to the second chamber 12 is fixed to the lower portion of the flange leak shield 2. Leakage can be determined by observing the presence of liquid in the liquid outlet pipe 15.

[0045] When a large amount of liquid (jet) leaks from the flange 4 connection, the leaked liquid is blocked by the inclined hole 6. Part of the liquid falls into the second chamber 12 through the liquid guide 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. Conversely, when a small amount of liquid leaks from the flange 4 connection, the leaked liquid drips into the second chamber 12 through the liquid outlet hole 100 and is finally discharged through the liquid outlet pipe 15.

[0046] With this structural arrangement, liquid leaking from the flange 4 connection is collected in the first chamber 5, while the flange 4 connecting bolts (bolt heads and nuts) are located in the left chamber 13 and the right chamber 14, respectively, forming a three-part structure. This effectively prevents liquid leaking from the connection from flowing to the connecting bolts, providing a compartmentalized isolation effect. This prevents leakage from a single location from contaminating the entire surface of the flange 4 and hindering maintenance.

[0047] Furthermore, to prevent condensation within the flange leak shield 2 due to temperature differences, a communication hole 16 is provided at the lower portion of the partition plate 11. The left chamber 13 and the right chamber 14 are connected to the second chamber 12 through the corresponding communication holes 16. Condensed water flows into the second chamber 12 through the communication holes 16 and is discharged through the liquid outlet pipe 15.

[0048] Furthermore, one of the reasons for the leakage of flange 4 is that the bolts are not tightened in place. However, the structural setting of the common flange cover requires the flange cover to be removed when checking the bolt torque or tightening the bolts, which is inconvenient. An inspection plate 17 is rotatably connected to both sides of the flange leak cover 2, and an inspection port 18 is provided on the inspection plate 17. During maintenance, the inspection port 18 can be rotated to face the bolt position so that the torque can be checked. A sealing member 19 is fixedly connected to the inspection port 18, which can provide a blocking effect, so that the flange leak cover 2 is in a relatively closed environment when no inspection is being carried out.

[0049] Furthermore, the sealing member 19 is made of rubber and has a flat end that is normally closed. When a torque detection tool or a wrench is inserted, the flat end is forced open by an external force, allowing the torque detection tool or wrench to pass through the sealing member 19 and into the flange leak-proof cover 2.

[0050] Furthermore, the interface closed ring 1 is composed of two half rings 20, which are connected by magnetic attraction to form a complete circular ring.

[0051] The flange leak shield 2 consists of two C-shaped shields 21, which are bolted together and may be sealed with a gasket. Each half-ring 20 is equipped with a wedge-shaped block 22, and a corresponding connecting block 23 is located within the C-shaped shield 21. The connecting block 23 is provided with a wedge-shaped groove 230. Specifically, magnets are mounted on the wedge-shaped blocks 22, with the magnetic poles of the two opposing wedge-shaped blocks 22 facing each other.

[0052] During installation, the two half rings 20 are magnetically connected to the flange 4 connection. The two C-shaped covers 21 are then brought into contact with each other and bolted together. The wedge-shaped block 22 extends into the wedge-shaped groove 230 on the connecting block 23. The wedge-shaped groove 230 and the wedge-shaped block 22 cooperate to press and secure the two half rings 20. This means that the two half rings 20 are secured while the bolts of the flange leak-proof cover 2 are tightened.

[0053] Furthermore, during maintenance, the gas carries the leaked liquid with it and forms a gas-liquid mixture. Figure 8-13 As shown, a gas-liquid separator tank 24 is also provided. A rotating shaft 25 is disposed within the gas-liquid separator tank 24. A drive motor 26 is connected to the rotating shaft 25. The housing of the drive motor 26 is fixedly connected to the gas-liquid separator tank 24, and the output shaft of the drive motor 26 passes through the gas-liquid separator 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 portion of the partition plate 48. The rotating shaft 25 drives the partition plate 48 to rotate. The rotating shaft 25 is a non-circular shaft, such as a square shaft or an elliptical shaft.

[0054] The bottom of the gas-liquid separation tank 24 is connected to an inlet pipe 28 and a first liquid discharge pipe 34 (both of which are equipped with corresponding valves), and the liquid discharge pipe 15 is connected to the inlet pipe 28. The gas-liquid separation tank 24 can be connected to multiple liquid discharge pipes 15.

[0055] The gas-liquid mixture is blown into the gas-liquid separator 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 is discharged through the outlet pipe 29 provided at the top of the gas-liquid separator 24, while the liquid collects at the bottom of the gas-liquid separator 24 and can be discharged through the drain pipe 34. A cover 47 is detachably connected to the gas-liquid separator 24.

[0056] A limit ring 30 is rotatably connected to the rotating shaft 25 and fixedly connected to the gas-liquid separator tank 24 via a connecting plate 31. The limit ring 30 limits the position of the partition plate 48. When the partition plate 48 is moved downward, it divides the gas-liquid separator tank 24 into an upper chamber 32 and a lower chamber 33. A second drain pipe 46 is provided on the gas-liquid separator tank 24, communicating with the upper chamber 32. The outlet pipe 29 is connected to a flushing pipe 38, which is equipped with a second one-way valve 39.

[0057] If the interface sealing ring 1 and flange leak shield 2 become contaminated, cover 47 is opened, and the two are assembled (i.e., flange leak shield 2 is bolted together, and the interface sealing ring 1 is located within the flange leak shield 2) and placed into upper chamber 32. Cover 47 is then closed, and drive motor 26 is activated, driving partition plate 48, interface sealing ring 1, and flange leak shield 2 to rotate. Cleaning water is sprayed into gas-liquid separator tank 24 through flushing pipe 38 and second one-way valve 39, cleaning the interface sealing ring 1 and flange leak shield 2. Wastewater generated during the cleaning process is discharged through second drain pipe 46.

[0058] Specifically, during the rotation process, to prevent friction between the end of the flange leak shield 2 and the cover 47, a bearing or ball bearing structure can be provided on the cover 47 to contact the upper end of the flange leak shield 2. The lower end of the flange leak shield 2 directly contacts the partition plate 48, and the friction between the partition plate 48 enables the partition plate 48 to drive the end of the flange leak shield 2 and the cover 47 to rotate.

[0059] The above-described partitioned structure allows for the cleaning of the interface sealing ring 1 and the flange leak-proof cover 2 while effectively preventing wastewater generated during the initial cleaning phase from flowing into the wire mesh demister 27, thereby providing protection. Furthermore, the interface sealing ring 1 and the flange leak-proof cover 2 can be cleaned and recycled.

[0060] Furthermore, a sealing ring 35 is fixed to the partition plate 48, which improves 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 of the partition plate 48. The partition plate 48 is provided with a plurality of air holes 37 that communicate with the gas collecting groove 36. The outlet pipe 29 is connected to the gas collecting groove 36. When the partition plate 48 is in the upper position, the gas separated from the gas-liquid mixture by the wire mesh demister 27 flows through the air holes 37 into the gas collecting groove 36 and is then discharged through the outlet pipe 29. This structure can further block the liquid in the gas.

[0061] At the same time, after the interface sealing ring 1 and the flange leak shield 2 are cleaned, the partition plate 48 moves upward, connecting the gas collecting tank 36 with the outlet pipe 29. 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 tank 36, and the air holes 37. The presence of multiple air holes 37 allows the wire mesh demister 27 to be cleaned from multiple directions, eliminating the need to start the drive motor 26 during the cleaning process.

[0062] Furthermore, a fixing ring 40 is fixedly connected to the top of the rotating shaft 25. The fixing ring 40 is connected to the partition plate 48 via a connecting rod assembly 41. The connecting rod assembly 41 includes two connecting rods that are hinged to each other in sequence. The ends of the two connecting rods are respectively hinged to the fixing ring 40 and the partition plate 48 via a hinge axis. A torsion spring is installed at the hinge between the two connecting rods. Multiple connecting rod assemblies 41 can be provided.

[0063] During cleaning, the partition plate 48 is pressed downward, increasing the angle between the two connecting rods and generating elastic potential energy in the torsion spring. The interface sealing ring 1 and the flange leak-proof cover 2 are then assembled and placed into the upper cavity 32. After cleaning, the interface sealing ring 1 and the flange leak-proof cover 2 are removed. The torsion spring releases its elastic potential energy, causing the partition plate 48 to move upward and return to its original position.

[0064] Furthermore, after cleaning the interface sealing ring 1 and the flange leak-proof cover 2, in order to prevent the cleaning water from remaining; 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 43; the baffle 43 and the connecting rod assembly are linked by a gear transmission mechanism.

[0065] When partition plate 48 moves downward, the connecting rod assembly drives baffle 43 through the gear transmission mechanism, blocking drain hole 42. Wastewater generated during the cleaning process is discharged through second drain pipe 46. When partition plate 48 moves upward, the connecting rod assembly drives baffle 43 through the gear transmission mechanism to move in the opposite direction. Opening 430 in baffle 43 faces drain hole 42, and the remaining cleaning water flows through opening 430 and drain hole 42 and falls into the bottom of gas-liquid separator tank 24. Because the remaining cleaning water is the water generated during the final cleaning process, it is relatively clean and therefore does not contaminate wire mesh demister 27.

[0066] The gear transmission mechanism specifically includes a gear 44 and a rack 45. Gear 44 is fixedly connected to the hinge shaft at the end of the lower connecting rod; rack 45 is fixedly connected to baffle 43 and meshes with gear 44. Because the hinge shaft is fixedly connected to the connecting rod, it is hinged to partition plate 48. Therefore, when partition plate 48 moves up and down, the hinge shaft drives gear 44 to rotate accordingly, and in turn, through meshing with rack 45, drives baffle 43 to move.

[0067] 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 by: 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 interface sealing ring (1) and the flange (4); a plurality of inclined holes (6) communicating with the first chamber (5) are provided on the interface sealing ring (1); the inclined holes (6) are arranged obliquely upward; a liquid guide groove (7) is provided on the outer surface of the interface sealing ring (1); an air blowing hole (8) and an air blowing pipe (9) are provided on the upper part of the interface sealing ring (1); the air blowing pipe (9) is communicated with the first chamber (5) through the air blowing hole (8); a first one-way valve (10) is provided in the air blowing pipe (9); a liquid outlet hole (100) is provided 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); a liquid outlet pipe (15) communicating with the second chamber (12) is fixed to the lower part of the flange leakproof cover (2).

2. A connection structure for preventing oil leakage at a connection point 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 communicated with the second chamber (12) through the corresponding communication holes (16).

3. The connection structure for preventing oil leakage at the 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), and an inspection opening (18) is provided on the inspection plate (17), and a blocking member (19) is fixedly connected to the inspection opening (18).

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

6. The connection structure for preventing oil leakage at the 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), and a corresponding connecting block (23) is provided in the C-shaped cover (21), and a wedge groove (230) is provided on the connecting block (23).

7. The connection structure for preventing oil leakage at the connection of a delivery pump according to claim 1, characterized in that: The invention also includes 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 (47) is detachably connected to the gas-liquid separation tank (24).

8. The connection structure for preventing oil leakage at the connection of a delivery pump according to claim 7, characterized in that: 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), and after the limiting, the gas-liquid separation tank (24) is divided into an upper cavity (32) and a lower cavity (33) by the partition plate (48), and the gas-liquid separation tank (24) is provided with a second drain pipe (46) connected to the upper cavity (32).

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

10. The connection structure for preventing oil leakage at the 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) through 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 (43); the baffle (43) and the connecting rod assembly (41) are linked by a gear transmission mechanism.

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