Mechanical sealing structure of Roots blower

Abstract

The utility model belongs to the technical field of Roots blowers, and particularly relates to a Roots blower mechanical sealing structure which comprises an air outlet pipe and an external pipe, a first step groove is formed in the outer side of the right end of the air outlet pipe, a second step groove is formed in the inner wall of the left end of the external pipe, and the first step groove is matched with the second step groove; the first sealing ring, the second sealing ring and the third sealing ring are arranged on the first stepped groove in a sleeving manner; the positioning assembly is arranged on the air outlet pipe, and the positioning assembly is matched with the external pipe; the air outlet pipe and the external connecting pipe can be rapidly disassembled and assembled in a clamping and fixing mode, tools do not need to be used for auxiliary operation, limitation is small, time and labor are saved, meanwhile, the three sealing ring structures can guarantee sealing performance to the maximum degree, and practicability is high.

Description

Technical Field

[0001] This utility model relates to the field of Roots blower technology, and in particular to a mechanical seal structure for Roots blowers. Background Technology

[0002] Roots blowers are positive displacement blowers, featuring impeller end faces and front and rear end covers. They operate on the principle of using two lobe-shaped rotors moving relative to each other within a cylinder to compress and transport gas. These blowers have a simple structure, are easy to manufacture, and are widely used in aquaculture aeration, wastewater treatment aeration, and cement conveying. They are particularly suitable for low-pressure gas conveying and pressurization systems and can also be used as vacuum pumps.

[0003] In existing technologies, since Roots blowers are mainly used for compressing and transporting gases, the sealing performance of the structure is crucial. Currently, the seal between the outlet pipe and the external pipeline of a Roots blower is achieved using only a sealing ring. However, the high pressure and permeability of gas during compression and transport result in poor sealing performance and easy leakage. Furthermore, the outlet pipe and external pipeline of a Roots blower are typically fixed with bolts, requiring the use of tools for disassembly and assembly, which is limiting and inconvenient for personnel to disassemble and maintain. Therefore, we propose a mechanical seal structure for Roots blowers to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the technology where the seal between the outlet pipe and the external pipeline of a Roots blower is only achieved by a sealing ring. During the compression and transportation of gas, the pressure and permeability are high, resulting in poor sealing performance and easy leakage. In addition, the outlet pipe and the external pipeline of a Roots blower are generally fixed by bolts, which requires the use of matching tools for disassembly and assembly, which is very limiting and inconvenient for personnel to disassemble and maintain. Therefore, this utility model proposes a mechanical seal structure for Roots blowers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A mechanical seal structure for a Roots blower, comprising:

[0007] The air outlet pipe and the outer pipe are provided with a first stepped groove on the outer side of the right end of the air outlet pipe and a second stepped groove on the inner wall of the left end of the outer pipe. The first stepped groove and the second stepped groove cooperate with each other.

[0008] The first sealing ring, the second sealing ring, and the third sealing ring are all fitted onto the first stepped groove;

[0009] A positioning component is disposed on the air outlet pipe and cooperates with the outer pipe.

[0010] Two clamps are provided, with one end of each clamp close to the other fixedly connected to the top and bottom of the outer tube, respectively.

[0011] The clamping assembly includes: four support rods, two clamping rods, two clamping blocks, two sliding rods, two screws, and two nuts. The bottom ends of the two upper support rods are fixedly connected to the top of the air outlet pipe, and the top ends of the two lower support rods are fixedly connected to the bottom of the air outlet pipe. The left end of the clamping rod is rotatably connected to the top end of the corresponding two support rods. The nut is fixedly connected to the corresponding clamping rod and threaded onto the corresponding screw. The right end of the screw is rotatably connected to the left side of the corresponding sliding rod. The ends of the two sliding rods that are close to each other pass through the two clamping rods and are slidably connected to them. The ends of the two clamping blocks that are far apart from each other are fixedly connected to the ends of the two sliding rods that are close to each other. The clamping blocks cooperate with the corresponding clamping plates.

[0012] In a preferred embodiment of this invention, the diameters of the first sealing ring, the second sealing ring, and the third sealing ring are arranged in descending order.

[0013] As a preferred embodiment of this utility model, the positioning assembly includes two positioning rods and two positioning rings. The left ends of the two positioning rods are fixedly connected to the air outlet pipe, and the two positioning rings are fixedly connected to the outer pipe. The positioning rods cooperate with the corresponding positioning rings.

[0014] In a preferred embodiment of this utility model, a first spring and a slip ring are respectively sleeved on the positioning rod. The left end of the first spring is fixedly connected to the positioning rod, and the right end of the first spring is fixedly connected to the left side of the slip ring. The slip ring cooperates with the corresponding positioning ring.

[0015] As a preferred embodiment of this utility model, the top and bottom of the air outlet pipe are fixedly connected with second springs, and the ends of the two second springs that are far apart from each other are respectively fixedly connected to the sides of the two clamps that are close to each other.

[0016] As a preferred embodiment of this utility model, each of the two levers is provided with a sliding groove, and the ends of the two levers that are close to each other pass through the two sliding grooves and are slidably connected to the inner wall of the sliding grooves.

[0017] Beneficial effects:

[0018] 1. By setting the first and second stepped grooves for insertion and matching, the insertion between the vent pipe and the outer pipe can be made more stable. At the same time, by setting the first, second and third sealing rings to seal the connection between the vent pipe and the outer pipe, the sealing performance can be greatly improved, ensuring that no leakage occurs between the vent pipe and the outer pipe.

[0019] 2. By setting the clamping limit cooperation between the clamping component and the two clamping plates, it is possible to quickly clamp and fix the air outlet pipe and the outer pipe, and to lock the pipe after clamping. This maximizes the convenience of disassembly and assembly and the clamping stability between the air outlet pipe and the outer pipe. The operation is convenient and quick, saving time and effort, and is highly practical.

[0020] 3. By inserting the positioning rod and the positioning ring, a stable connection between the air outlet pipe and the outer pipe can be achieved, and precise positioning can be realized. By setting the first spring to drive the slip ring for elastic support, it is easy to separate the air outlet pipe and the outer pipe when disassembling them.

[0021] This utility model achieves quick assembly and disassembly between the air outlet pipe and the external pipe through a snap-fit ​​fixing method, without the need for tools to assist in the operation. It has few limitations, saves time and effort, and the three sealing ring structure can ensure the sealing performance to the greatest extent, making it highly practical. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a three-dimensional structural diagram of the air outlet pipe of this utility model;

[0024] Figure 3 Appendix of this utility model Figure 2 A schematic diagram of the structure of part A;

[0025] Figure 4 This is a three-dimensional structural diagram of the outer pipe of this utility model.

[0026] In the diagram: 1. Air outlet pipe; 2. First stepped groove; 3. Outer pipe; 4. Second stepped groove; 5. First sealing ring; 6. Second sealing ring; 7. Third sealing ring; 8. Positioning rod; 9. First spring; 10. Slip ring; 11. Positioning ring; 12. Clamping plate; 13. Support rod; 14. Clamping rod; 15. Second spring; 16. Clamping block; 17. Sliding rod; 18. Sliding groove; 19. Screw; 20. Nut. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Example

[0029] Reference Figures 1-4 A mechanical seal structure for a Roots blower, comprising:

[0030] The air outlet pipe 1 and the outer pipe 3 are provided. The right end of the air outlet pipe 1 is provided with a first stepped groove 2, and the left end of the outer pipe 3 is provided with a second stepped groove 4. The first stepped groove 2 and the second stepped groove 4 are matched.

[0031] The first sealing ring 5, the second sealing ring 6, and the third sealing ring 7 are all fitted onto the first stepped groove 2.

[0032] The positioning component is installed on the air outlet pipe 1 and cooperates with the outer pipe 3;

[0033] Two clamping plates 12 are provided, and the ends of the two clamping plates 12 that are close to each other are respectively welded to the top and bottom of the outer tube 3;

[0034] The clamping assembly includes: four support rods 13, two clamping rods 14, two clamping blocks 16, two sliding rods 17, two screws 19, and two nuts 20. The bottom ends of the two upper support rods 13 are welded to the top of the vent pipe 1, and the top ends of the two lower support rods 13 are welded to the bottom of the vent pipe 1. The left end of the clamping rod 14 is rotatably connected to the top end of the corresponding two support rods 13 via a shaft. The nut 20 is welded to the corresponding clamping rod 14 and threaded onto the corresponding screw 19. The right end of the screw 19 is rotatably connected to the left side of the corresponding sliding rod 17 via a shaft. The ends of the two sliding rods 17 that are close to each other pass through the two clamping rods 14 and are slidably connected to the clamping rods 14. The sides of the two clamping blocks 16 that are far apart from each other are welded to the ends of the two sliding rods 17 that are close to each other. The clamping blocks 16 cooperate with the corresponding clamping plates 12.

[0035] With the above structure, the insertion and engagement between the first stepped groove 2 and the second stepped groove 4 can achieve a more stable connection between the vent pipe 1 and the outer pipe 3. At the same time, the connection and sealing between the vent pipe 1 and the outer pipe 3 by setting the first sealing ring 5, the second sealing ring 6 and the third sealing ring 7 can greatly improve its sealing performance and ensure that there is no leakage between the vent pipe 1 and the outer pipe 3. In addition, the snap-fit ​​assembly and the snap-fit ​​limiting engagement between the two snap-fit ​​plates 12 can achieve quick snap-fit ​​fixing between the vent pipe 1 and the outer pipe 3, and can also achieve locking operation after snap-fit. This maximizes the convenience of disassembly and assembly and the snap-fit ​​stability between the vent pipe 1 and the outer pipe 3. The operation is convenient and quick, saving time and effort, and is highly practical.

[0036] As a preferred embodiment of this utility model, the diameters of the first sealing ring 5, the second sealing ring 6, and the third sealing ring 7 are arranged in descending order. By setting the diameters of the first sealing ring 5, the second sealing ring 6, and the third sealing ring 7 in descending order, they can be adapted to the shape characteristics of the first stepped groove 2 and the second stepped groove 4, so that a perfect sealing effect can be achieved after they are inserted between the first stepped groove 2 and the second stepped groove 4.

[0037] As a preferred embodiment of this utility model, the positioning assembly includes two positioning rods 8 and two positioning rings 11. The left ends of the two positioning rods 8 are welded to the air outlet pipe 1, and the two positioning rings 11 are welded to the outer pipe 3. The positioning rods 8 cooperate with the corresponding positioning rings 11. Through the insertion between the positioning rods 8 and the positioning rings 11, a stable connection between the air outlet pipe 1 and the outer pipe 3 can be achieved, thus realizing precise positioning.

[0038] As a preferred embodiment of this utility model, a first spring 9 and a slip ring 10 are respectively sleeved on the positioning rod 8. The left end of the first spring 9 is welded to the positioning rod 8, and the right end of the first spring 9 is welded to the left side of the slip ring 10. The slip ring 10 cooperates with the corresponding positioning ring 11. By setting the first spring 9 to drive the slip ring 10 to provide elastic support, it is easy to separate the air outlet pipe 1 and the outer pipe 3 when disassembling them.

[0039] As a preferred embodiment of this utility model, a second spring 15 is welded to both the top and bottom of the air outlet pipe 1. The ends of the two second springs 15 that are far apart from each other are respectively welded to the sides of the two locking rods 14 that are close to each other. By setting the second springs 15, the two locking rods 14 can be driven to perform elastic reset.

[0040] As a preferred embodiment of this utility model, each of the two locking rods 14 is provided with a sliding groove 18. The ends of the two sliding rods 17 that are close to each other pass through the two sliding grooves 18 and are slidably connected to the inner wall of the sliding grooves 18. The sliding grooves 18 can stably limit and support the sliding rods 17, and facilitate the transmission of the screw 19 between the sliding rods 17 and the locking block 16.

[0041] The working principle of this utility model is as follows: In use, the right end of the vent pipe 1 is first inserted into the left end of the outer pipe 3. The insertion and engagement between the first stepped groove 2 and the second stepped groove 4 facilitates the setting of the first sealing ring 5, the second sealing ring 6, and the third sealing ring 7. This allows for efficient sealing between the vent pipe 1 and the outer pipe 3, ensuring a tight seal during installation. Furthermore, during the insertion process, the insertion of the positioning rod 8 and the positioning ring 11 ensures stable connection and precise positioning between the vent pipe 1 and the outer pipe 3. The elastic support provided by the first spring 9 driving the slip ring 10 facilitates separation of the vent pipe 1 and the outer pipe 3 during disassembly. Then, as the vent pipe 1 and the outer pipe 3 are inserted, the two locking rods 14 engage with two… The clamping plates 12 are interlocked, and through the elastic reset of the second spring 15 and the rotational characteristics of the clamping rod 14, the clamping block 16 and the clamping plate 12 can be clamped together. After the clamping block 16 and the clamping plate 12 are clamped together, the two screws 19 are rotated in sequence and the screws 19 and the nuts 20 are connected by threads. This drives the two sliding rods 17 and the two clamping blocks 16 to move to the left. Since the clamping block 16 and the clamping plate 12 are clamped together, the clamping plate 12 will also be pulled to the left. At this time, the air outlet pipe 1 and the outer pipe 3 can be brought closer to each other and the first sealing ring 5, the second sealing ring 6 and the third sealing ring 7 are pressed together. In this way, the air outlet pipe 1 and the outer pipe 3 can be quickly clamped and fixed, and the locking operation after clamping can be realized. This maximizes the convenience of disassembly and assembly and the clamping stability between the air outlet pipe 1 and the outer pipe 3. The operation is convenient and quick, saving time and effort, and is highly practical.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mechanical seal structure for a Roots blower, characterized in that, include: The air outlet pipe (1) and the outer pipe (3) are provided with a first stepped groove (2) on the outer side of the right end of the air outlet pipe (1) and a second stepped groove (4) on the inner wall of the left end of the outer pipe (3). The first stepped groove (2) and the second stepped groove (4) are matched. The first sealing ring (5), the second sealing ring (6) and the third sealing ring (7) are all fitted on the first stepped groove (2); Positioning component, the positioning component is disposed on the air outlet pipe (1), and the positioning component cooperates with the outer pipe (3); Two card plates (12) are provided, and the ends of the two card plates (12) that are close to each other are respectively fixedly connected to the top and bottom of the outer tube (3); The clamping assembly includes: four support rods (13), two clamping rods (14), two clamping blocks (16), two sliding rods (17), two screws (19), and two nuts (20). The bottom ends of the two upper support rods (13) are fixedly connected to the top of the air outlet pipe (1), and the top ends of the two lower support rods (13) are fixedly connected to the bottom of the air outlet pipe (1). The left end of the clamping rod (14) is rotatably connected to the top end of the corresponding two support rods (13). (20) is fixedly connected to the corresponding clamp rod (14), and the nut (20) is threaded onto the corresponding screw rod (19). The right end of the screw rod (19) is rotatably connected to the left side of the corresponding slide rod (17). The ends of the two slide rods (17) that are close to each other pass through the two clamp rods (14) and are slidably connected to the clamp rods (14). The sides of the two clamp blocks (16) that are far apart from each other are fixedly connected to the ends of the two slide rods (17) that are close to each other. The clamp blocks (16) cooperate with the corresponding clamp plate (12).

2. The mechanical seal structure for a Roots blower according to claim 1, characterized in that, The diameters of the first sealing ring (5), the second sealing ring (6), and the third sealing ring (7) are arranged in descending order.

3. The mechanical seal structure for a Roots blower according to claim 1, characterized in that, The positioning assembly includes two positioning rods (8) and two positioning rings (11). The left ends of the two positioning rods (8) are fixedly connected to the air outlet pipe (1), and the two positioning rings (11) are fixedly connected to the outer pipe (3). The positioning rods (8) cooperate with the corresponding positioning rings (11).

4. The mechanical seal structure for a Roots blower according to claim 3, characterized in that, The positioning rod (8) is respectively fitted with a first spring (9) and a slip ring (10). The left end of the first spring (9) is fixedly connected to the positioning rod (8), and the right end of the first spring (9) is fixedly connected to the left side of the slip ring (10). The slip ring (10) cooperates with the corresponding positioning ring (11).

5. The mechanical seal structure for a Roots blower according to claim 1, characterized in that, The top and bottom of the air outlet pipe (1) are fixedly connected with second springs (15), and the ends of the two second springs (15) that are far apart from each other are respectively fixedly connected to the sides of the two levers (14) that are close to each other.

6. The mechanical seal structure for a Roots blower according to claim 1, characterized in that, Both of the two levers (14) are provided with sliding grooves (18), and the two sliding rods (17) are close to each other, passing through the two sliding grooves (18) respectively and slidingly connected to the inner wall of the sliding grooves (18).

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