Rotary-cut sealing structure

Abstract

The utility model relates to the technical field of rotary cutting valves, in particular to a rotary cutting sealing structure which comprises a valve head upper shell and a valve head lower shell, a stator is arranged in the valve head upper shell, a clamping groove is formed in the inner wall of the stator, and an embedding groove is formed in the bottom end of the valve head upper shell. An embedded flange matched with the embedded groove is arranged at the top end of the valve head lower shell, and a rotor matched with the stator is arranged on the embedded flange. The rotor is connected with a torsion connecting plate, and a clamping ring matched with the embedding groove is arranged on the outer wall of the rotor; the sealing steel sleeve and the guide steel sleeve are arranged, and the clamping ring and the clamping groove for positioning are arranged on the rotor and the stator respectively, so that the stator and the rotor are in sealed connection, the influence of limit deformation and transmission fatigue deformation of the rotor is weakened, and it is ensured that the deformation trends of the rotor and the stator are synchronous; and the limit deformation of the reagent can be covered by the designed interference magnitude, so that the reagent leakage risk is reduced.

Description

Technical Field

[0001] This utility model relates to the field of rotary valve technology, specifically a rotary sealing structure. Background Technology

[0002] The rotary valve completes its function by switching the flow channels. The fixed part of the switching surface is called the stator, and the rotating part is called the rotor. The current sealing method is to make the contact surface between the rotor and the stator tapered, and the bottom of the rotor is supported by the elastic force of the spring, so that the conical surface of the rotor and the conical surface of the stator are in contact and pre-pressurized to achieve sealing.

[0003] Existing rotary valves achieve a seal by having the rotor and stator conical surfaces fit together and the lower valve head shell is tightened to the outer valve head shell. During this process, the spring is compressed and deformed, generating elastic force. This elastic force pushes the bearing and rotor, causing the rotor and stator to be pressed together on the conical surfaces. However, in actual use, the spring is under constant compression, which leads to a decrease in elastic force and insufficient pre-pressure on the conical surface, resulting in reagent leakage. Furthermore, when the ambient temperature fluctuates significantly, irregular and minute deformations occur on the conical surface, which can also cause reagent leakage.

[0004] Therefore, we propose a rotary sealing structure. Utility Model Content

[0005] One of the technical problems to be solved by this application is that existing methods use spring force to push the rotor and stator to achieve conical surface compression and seal, but the spring force will decrease due to long-term compression, resulting in insufficient pre-pressure on the conical surface and causing reagent leakage.

[0006] To address the aforementioned technical problems, this application provides a rotary sealing structure, comprising a valve head upper shell and a valve head lower shell. A stator is disposed inside the valve head upper shell, and a snap-fit ​​groove is provided on the inner wall of the stator. An embedding groove is provided inside the bottom end of the valve head upper shell. An embedding flange that mates with the embedding groove is provided at the top end of the valve head lower shell, and a rotor that mates with the stator is disposed on the embedding flange. A torsion connecting plate is connected to the rotor, and a snap-fit ​​ring that matches the embedding groove is provided on the outer wall of the rotor. The structure also includes a sealing steel sleeve and a guide steel sleeve. A sealing port that matches the guide steel sleeve is opened in the middle of the embedding flange. The guide steel sleeve is embedded in the sealing port and sleeved on the outer wall of the rotor. The outer wall of the sealing steel sleeve is connected to the inner wall of the guide steel sleeve.

[0007] In some embodiments, the flange and the valve head housing are provided with a plurality of fastening bolts, and the valve head housing and the valve head lower housing are fixed by means of the fastening bolts.

[0008] In some embodiments, a rubber pad is provided at the bottom of the stator.

[0009] In some embodiments, a sealing element is further included, the sealing element comprising a connecting sleeve fitted onto the guide steel sleeve, the connecting sleeve being sealed to the guide steel sleeve, and the outer wall of the connecting sleeve being tightly fitted to the inner wall of the sealing port, and the rubber gasket being tightly fitted to the top surface of the connecting sleeve.

[0010] In some embodiments, an extension sleeve is provided on the top surface of the connecting sleeve, the extension sleeve being sleeved on the rotor and tightly fitted to the rotor.

[0011] In some embodiments, the connecting sleeve and the extension sleeve are integrally molded rubber materials.

[0012] In some embodiments, a sleeve plate is fitted onto the fastening bolt, the sleeve plate being slidably connected to the fastening bolt, and a spring is fitted around the outside of the fastening bolt, the spring being located between the sleeve plate and the flange.

[0013] This utility model has at least the following beneficial effects:

[0014] 1. By setting a sealing steel sleeve and a guide steel sleeve, and setting a snap ring and a snap groove for positioning on the rotor and stator respectively, the stator and rotor are sealed together, which weakens the influence of rotor limit deformation and transmission fatigue deformation, ensures that the deformation trends of the rotor and stator are synchronized, and that their limit deformation can be covered by the designed interference fit, thereby reducing the risk of reagent leakage.

[0015] 2. The rubber gasket, connecting sleeve, and extension sleeve can be deformed by compression, thereby further increasing the sealing effect, improving sealing performance, reducing the probability of leakage, and improving practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the valve head shell and the stator.

[0018] Figure 3 This is a schematic diagram of the structure in which the lower housing of the valve head mates with the rotor.

[0019] Figure 4 for Figure 3 A schematic diagram of the three-dimensional structure of the explosion;

[0020] Figure 5 for Figure 4 Schematic diagram of the structure of the concealed lower shell of the valve head;

[0021] Figure 6 This is a schematic cross-sectional view of the stator and rotor assembly.

[0022] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0023] In the diagram: 1. Valve head housing; 2. Stator; 3. Valve head lower housing; 4. Fastening bolt; 5. Embedded groove; 6. Snap-fit ​​groove; 7. Rubber gasket; 8. Embedded flange; 9. Rotor; 10. Snap-fit ​​ring; 11. Seal; 12. Sealing steel sleeve; 13. Connecting sleeve; 14. Sealing port; 15. Extension sleeve; 16. Torsional connecting plate; 17. Guide steel sleeve; 18. Sleeve plate; 19. Spring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1:

[0026] Please see Figures 1 to 6 The technical solution provided by this utility model is as follows: A rotary sealing structure includes a valve head upper shell 1 and a valve head lower shell 3. A stator 2 is provided inside the valve head upper shell 1, and a snap-fit ​​groove 6 is provided on the inner wall of the stator 2. An embedding groove 5 is provided inside the bottom end of the valve head upper shell 1. An embedding flange 8 that mates with the embedding groove 5 is provided at the top end of the valve head lower shell 3. A rotor 9 that mates with the stator 2 is provided on the embedding flange 8. A torsion connecting plate 16 is connected to the rotor 9. A snap-fit ​​ring 10 that matches the embedding groove 5 is provided on the outer wall of the rotor 9. The structure also includes a sealing steel sleeve 12 and a guide steel sleeve 17. A sealing port 14 that matches the guide steel sleeve 17 is opened in the middle of the embedding flange 8. The guide steel sleeve 17 is embedded in the sealing port 14. The sealing steel sleeve 12 is sleeved on the outer wall of the rotor 9. The outer wall of the sealing steel sleeve 12 is connected to the inner wall of the guide steel sleeve 17.

[0027] In this embodiment, as Figure 2 Of Figure 6 As shown, during installation, both the sealing steel sleeve 12 and the guide steel sleeve 17 are embedded in the sealing port 14, so that the rotor 9 is sleeved in the middle of the sealing steel sleeve 12. Then, the snap ring 10 on the rotor 9 is snapped into the snap groove 6, which can realize the limiting and interference fit of the rotor 9 and the stator 2, reduce the movable space, thereby weakening the influence of the rotor 9's ultimate deformation and transmission fatigue deformation, so as to ensure that the deformation trend of the rotor 9 and the stator 2 are synchronized, so that the interference fit can cover the ultimate deformation, reducing the risk of reagent leakage.

[0028] In this embodiment, as Figure 1 Of Figure 2 As shown, multiple fastening bolts 4 are provided on the flange 8 and the valve head shell 1, and the valve head shell 1 and the valve head lower shell 3 are fixed by the fastening bolts 4.

[0029] In this embodiment, as Figure 2 Of Figure 6 As shown, a rubber pad 7 is provided at the bottom of the stator 2, and a sealing element 11 is also included. The sealing element 11 includes a connecting sleeve 13 that is fitted onto the guide steel sleeve 17. The connecting sleeve 13 is sealed to the guide steel sleeve 17, and the outer wall of the connecting sleeve 13 is tightly fitted to the inner wall of the sealing port 14. The rubber pad 7 is tightly fitted to the top surface of the connecting sleeve 13. An extension sleeve 15 is provided on the top surface of the connecting sleeve 13. The extension sleeve 15 is fitted onto the rotor 9 and is tightly fitted to the rotor 9. The connecting sleeve 13 and the extension sleeve 15 are integrally formed rubber materials.

[0030] Furthermore, after installation, the rubber gasket 7 on the stator 2 and the connecting sleeve 13 press against each other, thereby improving the sealing performance between the stator 2 and the rotor 9, significantly reducing the probability of leakage. In subsequent use, the connecting sleeve 13 can be replaced by disassembling the rotor 9, thereby increasing the service life of the device, reducing maintenance costs and improving utilization.

[0031] The implementation principle of the rotary sealing structure in this application embodiment is as follows: During installation, the sealing steel sleeve 12 and the guide steel sleeve 17 are both embedded in the sealing port 14, so that the rotor 9 is sleeved in the middle of the sealing steel sleeve 12. Then, the snap ring 10 on the rotor 9 is snapped into the snap groove 6, which can realize the limiting and interference fit of the rotor 9 and the stator 2, reduce the movable space, thereby weakening the influence of the rotor 9's ultimate deformation and transmission fatigue deformation, so as to ensure that the deformation trend of the rotor 9 and the stator 2 are synchronized, so that the interference fit can cover the ultimate deformation, reducing the risk of reagent leakage.

[0032] After installation, the rubber gasket 7 on the stator 2 and the connecting sleeve 13 press against each other, thereby improving the sealing performance between the stator 2 and the rotor 9, significantly reducing the probability of leakage. Furthermore, in subsequent use, the connecting sleeve 13 can be replaced by disassembling the rotor 9, thereby increasing the service life of the device, reducing maintenance costs, and improving utilization.

[0033] Example 2:

[0034] Please see Figure 7 The technical solution provided by this utility model is as follows:

[0035] Unlike Embodiment 1, a sleeve plate 18 is fitted onto the fastening bolt 4, and the sleeve plate 18 is slidably connected to the fastening bolt 4. A spring 19 is fitted around the outside of the fastening bolt 4, and the spring 19 is located between the sleeve plate 18 and the flange 8. The elastic force of the spring 19 acts on the fastening bolt 4, which can make the fastening bolt 4 have a tendency to be pushed, thereby improving the tight connection between the thread and the threaded hole of the fastening bolt 4, increasing the friction coefficient during connection, thereby reducing the occurrence of loosening and instability of the fastening bolt 4 due to repeated disassembly and assembly for maintenance after long-term use, and improving the installation stability.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A rotary sealing structure, comprising a valve head upper shell (1) and a valve head lower shell (3), characterized in that: A stator (2) is provided inside the valve head shell (1), and a snap-fit ​​groove (6) is provided on the inner wall of the stator (2). An embedding groove (5) is provided inside the bottom end of the valve head shell (1). The valve head lower housing (3) is provided with an embedding flange (8) that mates with the embedding groove (5) at its top end, and a rotor (9) that mates with the stator (2) is provided on the embedding flange (8). A torsion connecting plate (16) is connected to the rotor (9), and a snap ring (10) adapted to the embedding groove (5) is provided on the outer wall of the rotor (9). It also includes a sealing steel sleeve (12) and a guide steel sleeve (17). A sealing port (14) adapted to the guide steel sleeve (17) is provided in the middle of the embedded flange (8). The guide steel sleeve (17) is embedded in the sealing port (14). The sealing steel sleeve (12) is sleeved on the outer wall of the rotor (9). The outer wall of the sealing steel sleeve (12) is connected to the inner wall of the guide steel sleeve (17).

2. The rotary sealing structure according to claim 1, characterized in that: The flange (8) and the valve head shell (1) are provided with a plurality of fastening bolts (4), and the valve head shell (1) and the valve head lower shell (3) are fixed by the fastening bolts (4).

3. The rotary sealing structure according to claim 1, characterized in that: A rubber pad (7) is provided at the bottom of the stator (2).

4. The rotary sealing structure according to claim 3, characterized in that: It also includes a sealing element (11), which includes a connecting sleeve (13) fitted onto the guide steel sleeve (17). The connecting sleeve (13) is sealed to the guide steel sleeve (17), and the outer wall of the connecting sleeve (13) is tightly fitted to the inner wall of the sealing port (14). The rubber pad (7) is tightly fitted to the top surface of the connecting sleeve (13).

5. The rotary sealing structure according to claim 4, characterized in that: An extension sleeve (15) is provided on the top surface of the connecting sleeve (13), and the extension sleeve (15) is sleeved on the rotor (9) and fits tightly against the rotor (9).

6. The rotary sealing structure according to claim 5, characterized in that: The connecting sleeve (13) and the extension sleeve (15) are integrally formed rubber materials.

7. The rotary sealing structure according to claim 2, characterized in that: A sleeve plate (18) is fitted onto the fastening bolt (4), and the sleeve plate (18) is slidably connected to the fastening bolt (4). A spring (19) is fitted around the outside of the fastening bolt (4), and the spring (19) is located between the sleeve plate (18) and the flange (8).

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