Sealing ring group structure for oil injection and water injection device and oil injection and water injection device

Abstract

The utility model belongs to the technical field of grindable sealing, and particularly relates to a sealing ring set structure for an oil injection and water injection device and the oil injection and water injection device. The oil and water injection device comprises a spray head assembly, a sealing unit and a guiding unit. The nozzle assembly comprises a connecting flange, a valve and an oil injection pipe, the flange is connected with the valve, and one side of the valve is connected with the oil injection pipe; the sealing unit comprises an external sealing body, a sealing pressing ring, a sealing nut and an internal sealing ring set, the tail end of the external sealing body is connected to the outer side of the oil injection pipe in a sleeving mode, a cavity is formed by the head end of the external sealing body and the outer wall of the oil injection pipe, and the internal sealing ring set is arranged in the cavity and connected to the outer side of the oil injection pipe in a sleeving mode; the sealing compression ring is sleeved outside the oil filling pipe and outside the sealing ring group; the head end of the sealing nut sleeves the outer side of the oil filling pipe, and the tail end of the sealing nut sleeves the outer sides of the head ends of the sealing compression ring and the external sealing body; the internal sealing ring set comprises a first fixing ring, middle sealing rings and a second fixing ring, and the first fixing ring and the second fixing ring fix the multiple middle sealing rings.

Description

Technical Field

[0001] The utility model belongs to the technical field of wearable seals, and specifically provides a sealing ring group structure for an oil and water injection device and an oil and water injection device. Background Art

[0002] Centrifugal compressors occupy an important position in various industrial sectors, especially in petrochemical, metallurgy, natural gas transportation, refrigeration and power industries.

[0003] When the compressor works continuously for a long time, the nozzle is easily clogged by tar or dirt, and the nozzle needs to be replaced. When the nozzle is replaced, the compressor is in operation, which requires the oil and water injection device to be able to meet the requirements of online replacement. In addition, during long-term oil and water injection, the oil and water on the inner wall of the compressor will leak a small amount along the outer wall of the oil injection pipe, so a sealing structure needs to be set on the outer wall of the oil injection pipe. Utility Model Content

[0004] In order to solve one of the above problems, the utility model provides a sealing ring group structure for an oil and water injection device, which is arranged on the outside of the oil injection pipe of the oil and water injection device, and includes a first fixed ring, an intermediate sealing ring and a second fixed ring. A plurality of intermediate sealing rings are arranged in a V shape and are arranged in close contact with each other; the first fixed ring has a V-shaped recess on the contact surface with the intermediate sealing ring, and the second fixed ring has a V-shaped protrusion on the contact surface with the intermediate sealing ring. The first fixed ring and the second fixed ring fix the plurality of intermediate sealing rings.

[0005] According to another aspect of the present invention, there is also provided an oil and water injection device, comprising a spray head assembly, a sealing unit and a guide unit;

[0006] The nozzle assembly includes a connecting flange, a valve and an oil injection pipe, wherein the connecting flange is connected to the valve, one side of the valve is connected to the oil injection pipe, and the oil injection pipe is inserted into the compressor for oil and water injection;

[0007] The sealing unit comprises an external sealing body, a sealing pressure ring, a sealing nut and an internal sealing ring group. The tail end of the external sealing body is sleeved on the outside of the oil injection pipe, and the head end and the outer wall of the oil injection pipe form a cavity. The cavity is provided with an internal sealing ring group, which is sleeved on the outside of the oil injection pipe; the sealing pressure ring is sleeved on the outside of the oil injection pipe and the outside of the sealing ring group; the sealing nut has a head end sleeved on the outside of the oil injection pipe, and a tail end sleeved on the sealing pressure ring and the outside of the head end of the external sealing body;

[0008] The internal sealing ring group includes a first fixed ring, an intermediate sealing ring and a second fixed ring. Multiple intermediate sealing rings are arranged in a V shape and are arranged in close contact with each other. The first fixed ring has a V-shaped recess on the contact surface with the intermediate sealing ring, and the second fixed ring has a V-shaped protrusion on the contact surface with the intermediate sealing ring. The first fixed ring and the second fixed ring fix the multiple intermediate sealing rings.

[0009] Furthermore, it also includes a guide unit, including a first fixed ring seat, a connecting rod and a guide screw,

[0010] A first fixed ring seat is sleeved on the outside of the oil filling pipe and the outside of the sealing nut;

[0011] A connecting rod, both ends of which are fixed to the lower end of the first fixing ring seat and the lower end of the sealing body by nuts;

[0012] The guide screw has two ends fixed to the first fixed ring seat and the sealing body through connecting pieces respectively; the right connecting piece is fixed to the upper end of the sealing body, and the tail end of the guide screw is threaded through the connecting piece and fixed by a nut; the left connecting piece is fixed to the upper end of the first fixed ring seat, and the guide screw thread passes through the left fixing piece. In addition, a starting point limit nut and an end point limit nut are arranged on the guide screw, and the two nuts are distributed on both sides of the left connecting piece, and the two nuts limit the left and right displacement of the left fixing piece.

[0013] Furthermore, the guide screw is a split structure including a first screw and a second screw, wherein the second screw is fixed on the right connecting member, and the first screw is arranged on the left connecting member, wherein:

[0014] The tail end of the first screw is provided with a threaded hole in the radial direction;

[0015] The diameter of the second screw is larger than that of the first screw, and a threaded hole is radially arranged at the head end. The tail end of the first screw is threadedly connected to the inside of the head end of the second screw, and a screw is inserted into the aligned threaded holes of the two ends of the screw for fixing.

[0016] Furthermore, a circle of grooves is arranged on the inner side of the second fixing ring.

[0017] In the utility model, the nozzle assembly is inserted into the unit to spray water or oil. By adjusting the stroke of the guide screw and the end limit nut, the working position depth of the nozzle in the unit can be quickly and accurately determined. In addition, the guide screw structure in this solution is set to a split type, which is easier to process and improves production efficiency; the internal sealing ring group used changes the sealing method of the previous sealing ring. The sealing structure has a large sealing area, small deformation, long service life and more ideal sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic diagram of the structure of the oil and water injection device of the utility model.

[0019] Figure 2 for Figure 1 The middle I area is an enlarged schematic diagram of the internal sealing ring group structure;

[0020] Figure 3 is a schematic diagram of the structure of the guide screw;

[0021] Among them, 1. connecting flange; 2. valve; 3. oil filling pipe; 4. external sealing body; 5. sealing pressure ring; 6. sealing nut; 7. first fixing ring; 8. middle sealing ring; 9. second fixing ring; 10. first fixing ring seat; 11. connecting rod; 12. guide screw; 1201, first screw; 1202, second screw; 13. starting point limit nut; 14. end point limit nut; 15. left side connecting piece; 16. screw; 17. groove; 18. right side connecting piece; 19. ball valve. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] refer to Figure 1-3 The utility model provides a sealing ring group structure for an oil and water injection device, which is arranged outside the oil injection pipe of the oil and water injection device, and includes a first fixed ring, an intermediate sealing ring and a second fixed ring. A plurality of intermediate sealing rings are arranged in a V shape and are arranged in close contact with each other; the first fixed ring has a V-shaped recess on the contact surface with the intermediate sealing ring, and the second fixed ring has a V-shaped protrusion on the contact surface with the intermediate sealing ring. The first fixed ring and the second fixed ring fix the plurality of intermediate sealing rings.

[0024] According to another aspect of the present invention, there is also provided an oil and water injection device, comprising a spray head assembly, a sealing unit and a guide unit;

[0025] The nozzle assembly includes a connecting flange 1, a valve 2 and an oil filling pipe 3. The nozzle is connected to the valve 2. One side of the valve 2 is connected to the oil filling pipe 3. The head end of the oil filling pipe 3 is connected to the oil nozzle. The oil nozzle is inserted into the compressor to inject oil and water into the specified position of the unit.

[0026] The sealing unit includes an external sealing body 4, a sealing pressure ring 5, a sealing nut 6, and an internal sealing ring group, and the internal sealing ring group is the sealing ring group structure mentioned above. The tail end of the external sealing body 4 is sleeved on the outside of the oil filling pipe 3, and the head end forms a cavity with the outer wall of the oil filling pipe 3. The cavity is provided with an internal sealing ring group, and the internal sealing ring group is sleeved on the outside of the oil filling pipe 3; the sealing pressure ring 5 is sleeved on the outside of the oil filling pipe 3 and the outside of the sealing ring group; the sealing nut 6, the head end is sleeved on the outside of the oil filling pipe 3, and the tail end is sleeved on the sealing pressure ring 5 and the outside of the head end of the external sealing body 4. Because the external sealing body is an iron structure, it is impossible to seal the oil filling pipe, so the end of the external sealing body is sealed away from the compressor end, so the internal sealing ring group is provided between the external sealing body and the oil filling pipe 3.

[0027] The internal sealing ring group includes a first fixed ring 7, an intermediate sealing ring 8 and a second fixed ring 9. A plurality of intermediate sealing rings 8 are provided in a V-shape and are arranged close to each other. The contact surface of the first fixed ring 7 with the intermediate sealing ring 8 has a V-shaped recess, and the contact surface of the second fixed ring 9 with the intermediate sealing ring 8 has a V-shaped protrusion. The first fixed ring 7 and the second fixed ring 9 fix the plurality of intermediate sealing rings 8. The sealing structure has a large sealing area, a small deformation, a long service life and a more ideal sealing effect. The intermediate sealing ring 8 is set in a V-shape, and when squeezed, it is squeezed to both sides for a better sealing effect.

[0028] As an improvement of the solution, a guide unit is also included, including a first fixing ring 7 seat, a connecting rod 11 and a guide screw 12,

[0029] The first fixing ring 7 is sleeved on the outside of the oil filling pipe 3 and the outside of the sealing nut 6;

[0030] The connecting rod 11 has two ends fixed to the lower end of the first fixing ring seat 10 and the lower end of the sealing body 4 by nuts;

[0031] The two ends of the guide screw 12 are fixed to the first fixed ring seat 10 and the external sealing body 4 through connecting pieces respectively; the right connecting piece is fixed to the upper end of the sealing body 4, and the tail end of the guide screw 12 is threaded through the connecting piece and fixed by a nut; the left connecting piece is fixed to the upper end of the first fixed ring 7 seat, and the guide screw 12 is threaded through the left fixing piece. In addition, a starting point limiting nut 13 and an end point limiting nut 14 are provided on the guide screw 12, and the two nuts are distributed on both sides of the left connecting piece 15, and the two nuts limit the left and right displacement of the left fixing piece.

[0032] As an improvement of the solution, the guide screw 12 is a split structure including a first screw 1201 and a second screw 1202, wherein the second screw 1202 is fixed on the right connecting member 18, and the first screw 1201 is arranged on the left connecting member 15, wherein:

[0033] The tail end of the first screw rod 1201 has a threaded hole in the radial direction;

[0034] The diameter of the second screw 1202 is larger than that of the first screw 1201, and a threaded hole is radially arranged at the head end. The tail end of the first screw 1201 is threadedly connected to the inside of the head end of the second screw 1202, and a screw 16 is inserted into the aligned position of the threaded holes of the two ends of the screws for fixing. The split setting of the guide screw 12 makes the processing more convenient, and is easy to disassemble and extend as needed.

[0035] As an improvement of the solution, a circle of grooves 17 is provided on the inner side of the second fixing ring 9. When the nozzle is replaced, the oil filling pipe is completely pulled out, and the oil filling pipe 3 follows the pulling of the lead screw 12, so that the oil on the outer side of the oil filling pipe 3 is scraped and collected in the circle of grooves 17, and the second fixing ring can be replaced regularly.

[0036] In this solution, one end of the connecting flange 1 is connected to the oil tank or water tank. Two sets of sealing flanges are fixed on the compressor unit. A ball valve is set in the middle of the flange. The external sealing body 4 is fixed on the flange group on the left. When filling oil or water, open the ball valve, adjust the adjustment stroke of the guide screw 12, and insert the oil injection pipe with the oil injection nozzle through the ball valve to the specified depth in the compressor unit for oil and water injection. When not in use, the guide screw 12 can be adjusted as needed to pull the nozzle out of the compressor unit and close the ball valve.

[0037] When in use, the head end nut of the connecting rod 11 is released, and the guide screw 12 is rotated, which drives the oil injection pipe 3 to move toward the compressor unit so that the nozzle is aligned for oil injection. When not in use, the guide screw 12 is rotated in the opposite direction to remove the oil injection pipe 3 and close the ball valve.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing ring assembly structure for an oil and water injection device, arranged outside an oil injection pipe of the oil and water injection device, characterized in that: It includes a first fixing ring, an intermediate sealing ring and a second fixing ring. A plurality of intermediate sealing rings are arranged in a V shape and are arranged close to each other. The first fixing ring has a V-shaped recess on the contact surface with the intermediate sealing ring, and the second fixing ring has a V-shaped protrusion on the contact surface with the intermediate sealing ring. The first fixing ring and the second fixing ring fix the plurality of intermediate sealing rings.

2. An oil and water injection device, comprising a sealing ring assembly structure for an oil and water injection device according to claim 1, characterized in that: It includes a nozzle assembly, a sealing unit and a guide unit; The nozzle assembly includes a connecting flange, a valve and an oil injection pipe, wherein the connecting flange is connected to the valve, one side of the valve is connected to the oil injection pipe, and the oil injection pipe is inserted into the compressor for oil and water injection; The sealing unit comprises an external sealing body, a sealing pressure ring, a sealing nut and an internal sealing ring group, wherein the tail end of the external sealing body is sleeved on the outside of the oil injection pipe, and the head end and the outer wall of the oil injection pipe form a cavity, and an internal sealing ring group is arranged in the cavity, and the internal sealing ring group is sleeved on the outside of the oil injection pipe; the sealing pressure ring is sleeved on the outside of the oil injection pipe and the axial outside of the sealing ring group; the sealing nut has a head end sleeved on the outside of the oil injection pipe, and a tail end sleeved on the sealing pressure ring and the outside of the head end of the external sealing body; The internal sealing ring group includes a first fixed ring, an intermediate sealing ring and a second fixed ring. Multiple intermediate sealing rings are arranged in a V shape and are arranged in close contact with each other. The first fixed ring has a V-shaped recess on the contact surface with the intermediate sealing ring, and the second fixed ring has a V-shaped protrusion on the contact surface with the intermediate sealing ring. The first fixed ring and the second fixed ring fix the multiple intermediate sealing rings.

3. An oil and water injection device as claimed in claim 2, characterized in that: It also includes a guide unit, including a first fixed ring seat, a connecting rod and a guide screw, A first fixed ring seat is sleeved on the outside of the oil filling pipe and the outside of the sealing nut; A connecting rod, both ends of which are fixed to the lower end of the first fixing ring seat and the lower end of the sealing body by nuts; The guide screw has two ends fixed to the first fixed ring seat and the sealing body through connecting pieces respectively; the right connecting piece is fixed to the upper end of the sealing body, and the tail end of the guide screw is threaded through the connecting piece and fixed by a nut; the left connecting piece is fixed to the upper end of the first fixed ring seat, and the guide screw thread passes through the left fixing piece. In addition, a starting point limit nut and an end point limit nut are arranged on the guide screw, and the two nuts are distributed on both sides of the left connecting piece, and the two nuts limit the left and right displacement of the left fixing piece.

4. An oil and water injection device as claimed in claim 3, characterized in that: The guide screw is a split structure including a first screw and a second screw, wherein the second screw is fixed on the right connecting member, and the first screw is arranged on the left connecting member, wherein: The tail end of the first screw is provided with a threaded hole in the radial direction; The diameter of the second screw is larger than that of the first screw, and a threaded hole is radially arranged at the head end. The tail end of the first screw is threadedly connected to the inside of the head end of the second screw, and a screw is inserted into the aligned threaded holes of the two ends of the screw for fixing.

5. The oil and water injection device according to claim 2, characterized in that: A circle of grooves is arranged on the inner side of the second fixing ring.

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