Improved sealing connection structure of double-screw pump unit

Abstract

The utility model relates to the field of double-screw pump machines, in particular to an improved sealing connection structure of a double-screw pump unit, which comprises a first connector, a first fixing disc, a first flange plate, a second flange plate, a sealing ring, a second fixing disc and a second connector, the first fixing disc is fixedly connected to the right side of the first connector, and the first flange plate is fixedly connected to the right side of the first fixing disc. The second flange plate is arranged on the right side of the first flange plate, the sealing ring is rotationally installed on the outer sides of the first flange plate and the second flange plate, the second fixing plate is fixedly installed on the right side of the second flange plate, and the second connector is fixedly connected to the right side of the second fixing plate. The sealing ring embedded in the flange plate plays a sealing role, the sealing hoop ring is arranged on the outer side of the flange plate, the sealing ring on the outer side of the flange plate plays a sealing role by exerting pressure on the connecting buckle, the thin-wall sleeve is further arranged on the inner side of the flange plate, and the triple sealing structure enables the sealing effect to be good and the performance to be reliable.

Description

Technical Field

[0001] The utility model relates to the field of twin-screw pumps, in particular to an improved sealing connection structure of a twin-screw pump unit. Background Art

[0002] The sealing connection structure of a twin-screw pump unit refers to a device used to connect the pump and the pipeline system to ensure that there is no leakage during the transmission process of the fluid. This structure usually includes components such as flanges, gaskets, and fasteners. They work together to provide sufficient sealing force to prevent the fluid from overflowing from the connection. A good sealing connection structure is crucial to ensuring the safety and efficiency of the fluid transportation system.

[0003] At present, the commonly used sealing connection structures of twin-screw pump units include flange connection, welding connection and threaded connection. The uniformity of the bolt preload force is difficult to control, which can easily lead to sealing failure. Although welding connection can provide better sealing performance, the welding process is complicated and requires high skills of the operator. Once there is a problem with the welding quality, repair and replacement are very difficult.

[0004] Therefore, in order to address the problems of complex structure and poor sealing effect of the sealing connection structure of the above-mentioned existing twin-screw pump unit, an improved sealing connection structure of the twin-screw pump unit can be designed. By setting up multiple sets of sealing structures, the connection points can be sealed to prevent fluid leakage during transmission. Utility Model Content

[0005] In order to overcome the problems of complex structure and poor sealing effect of the sealing connection structure of the existing twin-screw pump unit, an improved sealing connection structure of the twin-screw pump unit is proposed.

[0006] The technical solution of the utility model is: an improved sealing connection structure of a twin-screw pump unit, comprising an interface 1, a fixed plate 1, a bolt sleeve 1, a flange 1, a flange 2, a sealing ring, a fixed plate 2, a bolt sleeve 2 and an interface 2, the fixed plate 1 being fixedly connected to the right side of the interface 1, the bolt sleeve 1 being fixedly installed on the outside of the fixed plate 1, the flange 1 being fixedly connected to the right side of the fixed plate 1, the flange 2 being arranged on the right side of the flange 1, the sealing ring being rotatably installed on the outsides of the flange 1 and the flange 2, the fixed plate 2 being fixedly installed on the right side of the flange 2, the bolt sleeve 2 being fixedly installed on the outside of the fixed plate 2, and the interface 2 being fixedly connected to the right side of the fixed plate 2.

[0007] Preferably, multiple sealing rings are used to seal the interface, two circles of grooves are opened in the flange, and sealing rings are fixedly installed in the grooves. Pressure is applied to flange one and flange two on both sides by the cooperation of bolt one and nut one, so that the sealing rings embedded in the flange play a sealing effect. Sealing hoops are provided on the outside of flange one and flange two. Pressure is applied to the connecting buckle by the cooperation of bolt two and nut two, so that the sealing rings on the outside of flange one and flange two play a sealing role. A thin-walled sleeve is also provided at the connection between the inner interface one and the interface two. The triple sealing structure makes its sealing effect better and the performance reliable.

[0008] Preferably, flange one includes screw hole one, groove one, sealing ring three and sealing ring four, screw hole one is arranged in an array on flange one, groove one is opened on the right side of flange one, sealing ring three is arranged on the outside of groove one, and sealing ring four is fixedly connected to the outside of flange one.

[0009] Preferably, flange 2 includes screw hole 2, a thin-walled sleeve, a sealing ring 5, a groove 2 and a sealing ring 6. The screw hole 2 is arranged in an array on flange 2, the thin-walled sleeve is fixedly connected to the inner side of flange 2, the sealing ring 5 is arranged on the left side of flange 2, the groove 2 is opened on the outside of the sealing ring 5, and the sealing ring 6 is fixedly connected to the outside of flange 2.

[0010] Preferably, the sealing ring includes a hoop, a connecting buckle, a third groove, two bolts and two nuts. The connecting buckle is fixedly connected to both sides of the hoop, the third groove is opened inside the hoop, the second bolt is rotatably installed in the connecting buckle mouth, and the second nut is arranged on the lower side of the connecting buckle.

[0011] Preferably, thread 1 is opened on the left side of interface 1, sealing ring 1 is fixedly connected to the right side of thread 1, reinforcing rib 1 is fixedly connected between interface 1 and fixed disk 1, thread 2 is opened on the right side of interface 2, sealing ring 2 is fixedly connected to the left side of thread 2, and reinforcing rib 2 is fixedly connected between interface 2 and fixed disk 2.

[0012] Preferably, a semicircular hole 1 is provided on the fixing plate 1 and is adapted to the bolt sleeve 1, and a semicircular hole 2 is provided on the sealing ring and is adapted to the bolt sleeve 1. The bolt 1 passes through the bolt sleeve 1, the flange 1, the flange 2 and the bolt sleeve 2 and is rotatably installed in the nut 1.

[0013] Preferably, groove one in flange one is matched with sealing ring five in flange two, groove two in flange two is matched with sealing ring three in flange one, and sealing ring four and sealing ring six are matched with groove three in the hoop.

[0014] The beneficial effects of the present invention are as follows: multiple sealing rings are used to seal the interfaces, two circles of grooves are opened in the flange, and sealing rings are fixedly installed in the grooves, and pressure is applied to flange one and flange two on both sides by the cooperation of bolt one and nut one, so that the sealing rings embedded in the flanges play a sealing effect, and sealing hoops are provided on the outsides of flange one and flange two, and pressure is applied to the connecting buckle by the cooperation of bolt two and nut two, so that the sealing rings on the outsides of flange one and flange two play a sealing role, and a thin-walled sleeve is also provided at the connection between the inner interface one and the interface two. The triple sealing structure makes its sealing effect better and the performance reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a schematic diagram of the overall three-dimensional structure of the improved sealing connection structure of the twin-screw pump unit of the present invention;

[0016] Figure 2 Shown is a schematic diagram of the overall cross-sectional three-dimensional structure of the improved sealing connection structure of the twin-screw pump unit of the present invention;

[0017] Figure 3 Shown is a schematic diagram of a three-dimensional structure of the flange of the improved sealing connection structure of the twin-screw pump unit of the present invention;

[0018] Figure 4 Shown is a schematic diagram of the three-dimensional structure of the flange plate of the improved sealing connection structure of the twin-screw pump unit of the present invention;

[0019] Figure 5 Shown is a schematic diagram of the three-dimensional structure of the sealing ring of the improved sealing connection structure of the twin-screw pump unit of the present invention;

[0020] Figure 6 Shown is a schematic diagram of the exploded view of the improved sealing connection structure of the twin-screw pump unit of the present invention;

[0021] Explanation of reference numerals: 1. Interface 1; 2. Thread 1; 3. Sealing ring 1; 4. Fixing plate 1; 5. Reinforcing rib 1; 6. Bolt sleeve 1; 7. Flange 1; 8. Flange 2; 9. Bolt 1; 10. Nut 1; 12. Fixing plate 2; 13. Bolt sleeve 2; 14. Interface 2; 15. Reinforcing rib 2; 16. Thread 2; 17. Sealing ring 2; 18. Screw hole 1; 19. Groove 1; 20. Sealing ring 3; 21. Sealing ring 4; 22. Screw hole 2; 23. Thin-walled sleeve; 24. Sealing ring 5; 25. Groove 2; 26. Sealing ring 6; 27. Hoop; 28. Connector; 29. ​​Groove 3; 30. Bolt 2; 31. Nut 2; 32. Semicircular hole 1; 33. Semicircular hole 2 DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] See also Figures 1-6 In this embodiment, the utility model provides an improved sealing connection structure of a twin-screw pump unit, including an interface 1, a fixed plate 4, a bolt sleeve 6, a flange 7, a flange 2 8, a sealing ring, a fixed plate 2 12, a bolt sleeve 2 13 and an interface 2 14. The fixed plate 14 is fixedly connected to the right side of the interface 1, the bolt sleeve 16 is fixedly installed on the outside of the fixed plate 14, the flange 17 is fixedly connected to the right side of the fixed plate 14, the flange 2 8 is arranged on the right side of the flange 17, the sealing ring is rotatably installed on the outside of the flange 17 and the flange 2 8, the fixed plate 2 12 is fixedly installed on the right side of the flange 2 8, the bolt sleeve 2 13 is fixedly installed on the outside of the fixed plate 2 12, and the interface 2 14 is fixed. It is connected to the right side of the fixed disk 2 12, and multiple sealing rings are used to seal the interface. Two circles of grooves are opened in the flange, and sealing rings are fixedly installed in the grooves. Pressure is applied to the flange 1 7 and flange 2 8 on both sides through the cooperation of bolt 1 9 and nut 10, so that the sealing ring embedded in the flange can play a sealing effect. A sealing hoop 27 is provided on the outside of flange 1 7 and flange 2 8. Pressure is applied to the connecting buckle 28 through the cooperation of bolt 2 30 and nut 2 31 so that the sealing rings on the outside of flange 1 7 and flange 2 8 can play a sealing role. A thin-walled sleeve 23 is also provided at the connection between the inner interface 1 and the interface 2 14. The triple sealing structure makes its sealing effect better and the performance reliable.

[0024] See also Figure 2-Figure 4 In this embodiment, flange 1 7 includes a screw hole 18, a groove 19, a sealing ring 3 20 and a sealing ring 4 21. The screw hole 18 is arranged in an array on flange 1 7. The groove 19 is opened on the right side of flange 1 7. The sealing ring 3 20 is arranged on the outside of the groove 19. The sealing ring 4 21 is fixedly connected to the outside of flange 1 7. A sealing ring is fixedly installed in the groove to play a sealing role. Flange 2 8 includes a screw hole 22, a thin-walled sleeve 23, a sealing ring 5 24, a groove 25 and a sealing ring 6 26. The screw hole 22 is arranged in an array on flange 2 8. The thin-walled sleeve 23 is fixedly connected to On the inside of flange 2 8, sealing ring 5 24 is set on the left side of flange 2 8, groove 2 25 is opened on the outside of sealing ring 5 24, sealing ring 6 26 is fixedly connected to the outside of flange 2 8, and a sealing ring is fixedly installed in the groove to play a sealing role. A thin-walled sleeve 23 is set inside to prevent leakage. The sealing ring includes a hoop 27, a connecting buckle 28, a groove 3 29, a bolt 2 30 and a nut 2 31. The connecting buckle 28 is fixedly connected to both sides of the hoop 27, the groove 3 29 is opened inside the hoop 27, the bolt 2 30 is rotatably installed in the mouth of the connecting buckle 28, and the nut 2 31 is set on the bottom side of the connecting buckle 28. The groove inside the hoop 27 is adapted to the sealing ring on the flange, playing a secondary sealing role.

[0025] See also Figure 5-Figure 6 In this embodiment, a thread 2 is provided on the left side of the interface 1, a sealing ring 3 is fixedly connected to the right side of the thread 2, a reinforcing rib 5 is fixedly connected between the interface 1 and the fixed plate 4, a thread 2 16 is provided on the right side of the interface 2 14, a sealing ring 2 17 is fixedly connected to the left side of the thread 2 16, a reinforcing rib 2 15 is fixedly connected between the interface 2 14 and the fixed plate 2 12, the threaded connection between the interface and the delivery pipe and the pump head is convenient, the sealing ring plays a sealing role, a semicircular hole 32 is provided on the fixed plate 4 to match the bolt sleeve 6, and a semicircular hole 2 33 is provided on the sealing ring to match the bolt sleeve 6. 1-9 passes through bolt sleeve 1-6, flange 1-7, flange 2-8 and bolt sleeve 2-13 and is rotated and installed in nut 10. The semicircular hole provides a position for fixing the bolt sleeve. The bolt sleeve disperses the pressure applied by the bolt to prevent leakage caused by excessive pressure at a certain point. The groove 19 in flange 1-7 is adapted to the sealing ring 5-24 in flange 2-8, the groove 25 in flange 2-8 is adapted to the sealing ring 3-20 in flange 1-7, the sealing ring 4-21 and the sealing ring 6-26 are adapted to the groove 3-29 in the hoop 27. The sealing rings and the grooves are adapted one by one and fit tightly to prevent leakage.

[0026] During operation, the interface 1 is connected to the conveying pipe through the thread 12 or directly welded to the conveying pipe, the interface 2 14 is connected or welded to the twin-screw pump head through the thread 2 16, then the flange 1 7 and the flange 2 8 are aligned and closed, the bolt 1 9 is passed through the bolt sleeve 1 6, the flange 1 7, the flange 2 8 and the bolt sleeve 2 13 and rotated to be installed in the nut 10, and the bolt 1 9 is tightened. The flange 1 7 and the flange 2 8 are squeezed against each other, so that the sealing ring 3 20 and the sealing ring 5 24 seal the inside of the flange. At the same time, the thin-walled sleeve 23 on the inside of the flange 2 8 also plays a sealing role on the inside of the connection structure. The hoop 27 is installed from the upper and lower sides of the closed position of the flange 1 7 and the flange 2 8, and the bolt 2 30 is passed through the connecting buckle 28 and rotated to be installed in the bolt 2 30 to complete the locking of the hoop 27. The groove 3 29 in the hoop 27 and the sealing ring 4 21 on the flange 1 7 and the sealing ring 6 26 on the flange 2 8 are closed to play a sealing role.

[0027] Through the above steps, multiple sealing rings are used to seal the interface, two circles of grooves are opened in the flange, and sealing rings are fixedly installed in the grooves. Pressure is applied to flange 1 7 and flange 2 8 on both sides by the cooperation of bolt 1 9 and nut 10, so that the sealing rings embedded in the flange play a sealing effect. A sealing hoop 27 is provided on the outside of flange 1 7 and flange 2 8. Pressure is applied to the connecting buckle 28 by the cooperation of bolt 2 30 and nut 2 31 so that the sealing rings on the outside of flange 1 7 and flange 2 8 play a sealing role. A thin-walled sleeve 23 is also provided at the connection between the inner interface 1 and the interface 2 14. The triple sealing structure makes its sealing effect better and the performance reliable.

[0028] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present invention.

Claims

1. An improved sealing connection structure of a twin-screw pump unit, comprising a first interface (1), a first fixing plate (4), a first bolt sleeve (6), a second fixing plate (12), a second bolt sleeve (13) and a second interface (14); characterized in that: It also includes flange 1 (7), flange 2 (8) and a sealing ring. Fixed plate 1 (4) is fixedly connected to the right side of interface 1 (1). Bolt sleeve 1 (6) is fixedly installed on the outside of fixed plate 1 (4). Flange 1 (7) is fixedly connected to the right side of fixed plate 1 (4). Flange 2 (8) is set on the right side of flange 1 (7). The sealing ring is rotatably installed on the outside of flange 1 (7) and flange 2 (8). Fixed plate 2 (12) is fixedly installed on the right side of flange 2 (8). Bolt sleeve 2 (13) is fixedly installed on the outside of fixed plate 2 (12). Interface 2 (14) is fixedly connected to the right side of fixed plate 2 (12).

2. The improved sealing connection structure of the twin-screw pump unit according to claim 1, characterized in that: The flange (7) comprises a screw hole (18), a groove (19), a sealing ring (20) and a sealing ring (21). The screw hole (18) is arranged in an array on the flange (7). The groove (19) is opened on the right side of the flange (7). The sealing ring (20) is arranged on the outside of the groove (19). The sealing ring (21) is fixedly connected to the outside of the flange (7).

3. The improved sealing connection structure of the twin-screw pump unit according to claim 2, characterized in that: The flange plate 2 (8) comprises a screw hole 2 (22), a thin-walled sleeve (23), a sealing ring 5 (24), a groove 2 (25) and a sealing ring 6 (26). The screw hole 2 (22) is arranged in an array on the flange plate 2 (8). The thin-walled sleeve (23) is fixedly connected to the inner side of the flange plate 2 (8). The sealing ring 5 (24) is arranged on the left side of the flange plate 2 (8). The groove 2 (25) is opened on the outer side of the sealing ring 5 (24). The sealing ring 6 (26) is fixedly connected to the outer side of the flange plate 2 (8).

4. The improved sealing connection structure of the twin-screw pump unit according to claim 3, characterized in that: The sealing ring comprises a hoop (27), a connecting buckle (28), a third groove (29), a second bolt (30) and a second nut (31). The connecting buckle (28) is fixedly connected to both sides of the hoop (27). The third groove (29) is opened inside the hoop (27). The second bolt (30) is rotatably installed in the mouth of the connecting buckle (28). The second nut (31) is arranged on the lower side of the connecting buckle (28).

5. The improved sealing connection structure of the twin-screw pump unit according to claim 4, characterized in that: The left side of the interface (1) is provided with a thread (2), the sealing ring (3) is fixedly connected to the right side of the thread (2), the interface (1) and the fixed plate (4) are fixedly connected with a reinforcing rib (5), the right side of the interface (14) is provided with a thread (16), the sealing ring (17) is fixedly connected to the left side of the thread (16), and the interface (14) and the fixed plate (12) are fixedly connected with a reinforcing rib (15).

6. The improved sealing connection structure of the twin-screw pump unit according to claim 5, characterized in that: A semicircular hole (32) adapted to the bolt sleeve (6) is provided on the fixing plate (4), and a semicircular hole (33) adapted to the bolt sleeve (6) is provided on the sealing ring. The bolt (9) passes through the bolt sleeve (6), the flange (7), the flange (8) and the bolt sleeve (13) and is rotatably installed in the nut (10).

7. The improved sealing connection structure of the twin-screw pump unit according to claim 6, characterized in that: The groove one (19) in the flange one (7) is adapted to the sealing ring five (24) in the flange two (8), the groove two (25) in the flange two (8) is adapted to the sealing ring three (20) in the flange one (7), and the sealing ring four (21) and the sealing ring six (26) are adapted to the groove three (29) in the hoop (27).

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