High-reliability flap valve for vacuum sealing

Abstract

A high-reliability flap valve for vacuum sealing comprises an air cylinder assembly, a main shaft and a sealing door plate assembly connected to the main shaft, the two axial ends of the main shaft are connected with the air cylinder assembly through end connecting devices respectively, and each end connecting device comprises a hollow shaft magnetofluid sealing piece and a swing rod which are arranged on the main shaft in a sleeving mode. The hollow shaft magnetofluid sealing element comprises a hollow magnetic flow sealing body and a fixed shaft seat which are nested inside and outside, the hollow magnetic flow sealing body is arranged between the main shaft and the fixed shaft seat in a sleeving manner and is fixedly connected with the main shaft through a C-shaped key, and the end part, extending out of the hollow shaft magnetofluid sealing element, of the main shaft is fixedly connected with the swing rod through an expansion sleeve; according to the flap valve structure, the connection structure between the main shaft and the air cylinder assembly in the flap valve structure is improved, reliable connection of the flap valve main shaft in a vacuum system from the vacuum side to the atmosphere side is achieved through few parts, and therefore the reliability of sealing and connection of the main shaft is improved to the maximum extent; the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum valves, and specifically relates to a flap valve for high-reliability vacuum sealing. Background Art

[0002] In the preparation process of products such as glass and plastics, vacuum equipment is usually required for tempering, coating, etc., and the opening and closing of the vacuum equipment are usually realized by a flap valve.

[0003] Currently, in the vacuum system of the prior art, in the specific structure of the flap valve, the connection of the main shaft of the flap valve usually needs to be realized by a coupling to fix the connection from the vacuum side to the atmospheric side. As shown in the attached Figure 1 figure, in the existing flap valve structure, during the process of the cylinder assembly 1 driving the main shaft 9 to rotate, it is necessary to pass through structures such as the swing rod 4, the fixed connection assembly inside the swing rod, the shaft-mounted magnetic fluid sealing device 11 and the coupling 12 to realize the connection between the main shaft 9 and the cylinder assembly 1. The opening and closing angle of the valve of the vacuum chamber 10 is realized by the limit block 13 fixedly arranged on the coupling 12.

[0004] The main defects of this existing flap valve structure are as follows: 1. There are certain limitations in the connection between the main shaft 9 and the cylinder assembly 1. For example, when connecting and transmitting power through the coupling 12, problems such as low transmission efficiency, easy damage, complex maintenance, and low reliability will occur due to many acting components; 2. The equipment connection structure is complex, there are many fault points, the maintenance cost is high, and the reliability is poor; 3. Using the limit block to limit the opening and closing angle of the valve of the vacuum chamber 10 has the problems of single angle and poor adjustability. Summary of the Invention

[0005] The technical purpose of the utility model is: by improving the connection structure between the main shaft and the cylinder assembly in the flap valve structure, abandoning the connection method of splicing multiple sections of shafts such as the coupling and the limit block, and using fewer components to realize the reliable connection of the main shaft of the flap valve from the vacuum side to the atmospheric side in the vacuum system, so as to maximize the reliability of the main shaft seal and connection and reduce the maintenance cost.

[0006] To achieve the above technical objectives, the technical solution adopted by the present utility model is as follows: A flap valve for high-reliability vacuum sealing, comprising a cylinder assembly, a main shaft, and a sealing door panel assembly connected to the main shaft. The two axial ends of the main shaft are respectively connected to the cylinder assembly through an end connection device, enabling the cylinder assembly to drive the main shaft and the sealing door panel assembly to rotate via the two end connection devices, thereby realizing the opening and closing of the vacuum chamber valve; the end connection device includes a hollow shaft magneto-fluid seal and a swing rod sleeved on the main shaft. The hollow shaft magneto-fluid seal includes a hollow magneto-fluid seal body and a fixed shaft seat arranged in an inner and outer nested manner. The fixed shaft seat is fixed on the outer wall of the vacuum chamber by bolts. The hollow magneto-fluid seal body is sleeved between the main shaft and the fixed shaft seat and is fixedly connected to the main shaft through a C-shaped key. The end of the main shaft extending out of the hollow shaft magneto-fluid seal is fixedly connected to the swing rod through a shrink disk. The swing rod is connected to a floating joint in the cylinder assembly, enabling the cylinder assembly to drive the main shaft and the hollow magneto-fluid seal body to rotate in the fixed shaft seat through the swing rod and the shrink disk.

[0007] Further, the sealing door panel assembly is fixed on the main shaft through a plurality of connection units, and the plurality of connection units are evenly arranged left and right in the axial direction of the main shaft.

[0008] Further, the connection unit is composed of a positioning module and a connection module. The positioning module includes a positioning block at the upper end and a clamp ring at the lower end. The positioning block is fixed on the outer side wall of the vacuum chamber by screws, and the clamp ring is sleeved on the main shaft; the connection module includes two fixed blocks symmetrically arranged at the two axial ends of the clamp ring and a connection block connected to the lower ends of the two fixed blocks. The upper end of each fixed block is fixed on the main shaft by screws, and the lower end is connected to the sealing door panel assembly through adjusting bolts. The connection block is arranged between the two fixed blocks and is connected to the sealing door panel assembly by screws. At the left and right ends of the connection block, a pin shaft is respectively extended outwards, and the two pin shafts can respectively cooperate with the preset shaft holes on the two fixed blocks to realize the rotational connection between the connection block and the two fixed blocks.

[0009] Further, in the positioning module, there is a clearance fit between the clamp ring and the main shaft, and a bearing through which the main shaft passes is also sleeved on the inner side of the clamp ring.

[0010] Further, the sealing door panel assembly is provided with grooves for accommodating the fixed blocks and the connection blocks.

[0011] Further, the thickness of the connection block is the same as the thickness of the lower end of the fixed block.

[0012] Further, the number of adjusting bolts in each connection unit is four, and the four adjusting bolts are symmetrically arranged left and right. By controlling the threaded connection depth of the adjusting bolts at different positions with the sealing door panel assembly, the angle adjustment of the vacuum chamber valve can be realized.

[0013] Further, one end of the hollow magnetic fluid seal body extends out of the fixed shaft seat, and the C-shaped key is arranged at the end of the hollow magnetic fluid seal body extending out of the fixed shaft seat.

[0014] Further, the C-shaped key is clamped in a preset groove at the end of the hollow magnetic fluid seal body, and the C-shaped key is fixedly connected to the main shaft through a bolt.

[0015] Further, an O-shaped sealing ring for enhancing sealing is also arranged inside the hollow magnetic fluid seal body.

[0016] Beneficial effects:

[0017] A flap valve for high-reliability vacuum sealing of the present utility model realizes the direct connection of the main shaft from the vacuum side to the atmosphere side by using sealing connection components such as a hollow shaft magnetic fluid seal, a C-shaped key, a shrink disc, and an O-shaped sealing ring, and has the following remarkable advantages:

[0018] 1. Improve the reliability of the connection: Since the coupling is omitted in the connection structure and the main shaft is directly connected to the hollow shaft magnetic fluid seal, the failure points in the transmission process are reduced, and the reliability of the entire system is improved.

[0019] 2. Reduce the maintenance cost: The traditional coupling structure is complex and requires regular lubrication and inspection, while the present invention omits the coupling, greatly reducing the maintenance cost.

[0020] 3. Improve the transmission efficiency: Since the hollow shaft magnetic fluid seal has good transmission performance, the present application can achieve efficient and stable transmission, improving the sealing performance of the sealing door plate assembly.

[0021] 4. Strong adaptability: The flap valve structure of the present utility model is convenient for disassembly and assembly, and is applicable to various vacuum systems, and can play a good role both in the laboratory and in industrial production.

[0022] 5. The present application uses a connection unit with a special structure to realize the connection and fixation between the sealing door plate assembly and the main shaft. Compared with the existing limit block limit structure, the connection unit with multiple adjusting bolts has an adjustable limit angle, a wide adjustable range, and good operability. Description of the drawings

[0023] Figure 1 is a schematic structural diagram of a flap valve in the prior art;

[0024] Figure 2 is a schematic structural diagram of the installation position of the flap valve in the present utility model;

[0025] Figure 3 is a schematic structural diagram of the flap valve in the present utility model;

[0026] Figure 4 It is a schematic diagram of the partially cut-open structure of the flap valve in the present utility model;

[0027] Figure 5 It is a schematic diagram of the structure of the connecting unit in the present utility model;

[0028] Reference numerals: 1, cylinder assembly; 2, sealing door panel assembly; 3, connecting unit; 301, positioning block; 302, clamp ring; 303, fixing block; 304, connecting block; 305, adjusting bolt; 4, swing rod; 5, expansion sleeve; 6, C-shaped key; 7, hollow shaft magnetic fluid seal; 8, O-ring seal; 9, main shaft; 10, vacuum chamber; 11, magnetic fluid seal device with shaft; 12, coupling; 13, limit block. Specific embodiments

[0029] The following further describes the present utility model in detail with reference to the drawings and specific embodiments, but the present utility model is not limited to the following embodiments. The purpose of disclosing the present utility model is to protect all changes and improvements within the scope of the present utility model.

[0030] As shown in the figure, the present utility model provides a highly reliable flap valve for vacuum sealing, which aims to solve the connection problem of the main shaft of the flap valve from the vacuum side to the atmospheric side in the vacuum system. The flap valve structure of the present utility model can effectively reduce the maintenance cost and improve the reliability of the main shaft seal and connection.

[0031] The specific structure of a highly reliable flap valve for vacuum sealing includes a cylinder assembly 1, a main shaft 9, and a sealing door plate assembly 2 connected to the main shaft 9. The sealing door plate assembly 2 is fixed to the main shaft 9 through a plurality of connecting units 3, and the plurality of connecting units 3 are evenly arranged on the left and right in the axial direction of the main shaft 9. The connecting unit 3 consists of a positioning module and a connecting module. The positioning module includes a positioning block 301 at the upper end and a clamping ring 302 at the lower end. The positioning block 301 is fixed to the outer side wall of the vacuum chamber 10 by screws. The clamping ring 302 is sleeved on the main shaft 9, and there is a clearance fit between the clamping ring 302 and the main shaft 9. A bearing through which the main shaft 9 passes is also sleeved on the inner side of the clamping ring 302. The connecting module includes two fixing blocks 303 symmetrically arranged on the left and right at the axial ends of the clamping ring 302 and a connecting block 304 connected to the lower ends of the two fixing blocks 303. The upper end of each fixing block 303 is fixed to the main shaft 9 by screws, and the lower end is connected to the sealing door plate assembly 2 through an adjusting bolt 305. The connecting block 304 is arranged between the two fixing blocks 303 and is connected to the sealing door plate assembly 2 by screws. A pin shaft extends outward from each of the left and right ends of the connecting block 304, and the two pin shafts can respectively cooperate with the preset shaft holes on the two fixing blocks 303 to realize the rotational connection between the connecting block 304 and the two fixing blocks 303. A groove for accommodating the fixing blocks 303 and the connecting block 304 is provided on the sealing door plate assembly 2. The thickness of the connecting block 304 is the same as the thickness of the lower end of the fixing block 303. The number of adjusting bolts 305 in each connecting unit 3 is four, and the four adjusting bolts 305 are symmetrically arranged on the left and right. By controlling the threaded connection depth of the adjusting bolts 305 at different positions with the sealing door plate assembly 2, the valve angle of the vacuum chamber 10 can be adjusted.

[0032] Both ends of the main shaft 9 in the axial direction are respectively connected to the cylinder assembly 1 through an end connection device, enabling the cylinder assembly 1 to drive the main shaft 9 and the sealed door plate assembly 2 to rotate via the two end connection devices, thereby realizing the opening and closing of the valve of the vacuum chamber 10; the end connection device includes a hollow shaft magnetic fluid seal 7 and a swing rod 4 sleeved on the main shaft 9. The hollow shaft magnetic fluid seal 7 includes a hollow magnetic fluid seal body and a fixed shaft seat arranged in an inner and outer nested manner. The fixed shaft seat is fixed on the outer wall surface of the vacuum chamber 10 by bolts. The hollow magnetic fluid seal body is sleeved between the main shaft 9 and the fixed shaft seat and is fixedly connected to the main shaft 9 through a C-shaped key 6. The end of the main shaft 9 extending out of the hollow shaft magnetic fluid seal 7 is fixedly connected to the swing rod 4 through a shrink disc 5. The swing rod 4 is connected to the floating joint in the cylinder assembly 1, enabling the cylinder assembly 1 to drive the main shaft 9 and the hollow magnetic fluid seal body to rotate in the fixed shaft seat through the swing rod 4 and the shrink disc 5. One end of the hollow magnetic fluid seal body close to the swing rod 4 extends out of the fixed shaft seat, and the C-shaped key 6 is arranged at the end of the hollow magnetic fluid seal body extending out of the fixed shaft seat. The C-shaped key 6 is clamped in a preset groove at the end of the hollow magnetic fluid seal body, and the C-shaped key 6 is fixedly connected to the main shaft 9 through bolts. An O-ring 8 for enhancing the seal is also arranged inside the hollow magnetic fluid seal body.

[0033] A high-reliability flap valve for vacuum sealing of the present utility model abandons the main shaft connection method of splicing multiple sections of shafts by a coupling 12 and a limit block 13, adopts a single chrome-plated main shaft 9, and is installed on two hollow shaft magnetic fluid seals 7 at both ends of the vacuum chamber 10 by positioning through a C-shaped key 6. Then, the adjustable-angle sealed door plate assembly 2 and multiple connection units 3 are installed on the single chrome-plated main shaft 9 at equal intervals. The part of the chrome-plated main shaft 9 extending out of the hollow shaft magnetic fluid seal 7 is connected to the swing rod 4 through a shrink disc 5, making the swing rod 4 and the chrome-plated main shaft 9 an integral body. Then, the swing rod 4 is connected to the floating joint of the cylinder assembly 1. Finally, the opening and closing of the valve are realized through the telescopic movement of the cylinder assembly 1, achieving the sealing effect of the vacuum chamber 10.

[0034] As shown in the Figure 1 accompanying drawings, in the flap valve structure of the prior art, it is fixedly connected by a shaft magnetic fluid seal device 11 with a shaft and a chrome-plated main shaft 9 through a coupling 12 and a limit block 13. Among them, both ends of the shaft magnetic fluid seal device 11 are provided with pin shafts. One pin shaft is fixedly connected to the main shaft through a coupling 12, and the other pin shaft is fixedly connected to the swing rod 4 through a complex structure fixed connection assembly arranged inside the swing rod 4. This main shaft 9 connection method has a complex structure, many components, low transmission efficiency, and is prone to damage.

[0035] As shown in the Figure 2As shown in the figure, the flap valve structure of the present utility model is fixedly installed on the vacuum chamber 10 by screws. It forms an integral whole by itself, and realizes the air release and vacuum of the vacuum chamber 10 through the opening and closing of the sealing door panel assembly 2. In the flap valve structure of the present utility model, the end connection device between the main shaft 9 and the cylinder assembly 1 is the key point of the equipment and also the key to ensuring the efficient and reliable operation of the entire flap valve.

[0036] As shown in the attached Figure 3 and attached Figure 4 As shown in the figure, when a highly reliable flap valve for vacuum sealing of the present utility model is specifically installed and used, the chromium-plated main shaft 9 in the flap valve needs to pass through the clamp rings in a plurality of connection units 3 in sequence, and then the main shaft 9 is fixed on the outer wall surface of the vacuum chamber 10 through a plurality of screws via the positioning blocks. After that, the sealing door panel assembly is fixedly connected to the main shaft 9 through a plurality of connection modules, and the opening angle of the sealing door panel assembly can be freely adjusted through a plurality of adjusting bolts in the connection modules. Then, an end connection device is installed at both ends of the main shaft 9. The end connection device includes an O-ring 8 and a hollow shaft magneto-fluid seal 7 sleeved in sequence, and at the end of the hollow magneto-fluid seal body in the hollow shaft magneto-fluid seal 7, the hollow magneto-fluid seal body is fixedly installed on the main shaft 9 through a C-key 6 via screws. Among them, the main function of the C-key 6 is to ensure that the hollow magneto-fluid seal body in the hollow shaft magneto-fluid seal 7 and the main shaft 9 can rotate synchronously. The C-key 6 is fixed on the main shaft 9 through screws and then cooperates with the preset notch on the hollow magneto-fluid seal body to achieve synchronous rotation. The O-ring 8 is installed inside the hollow magneto-fluid seal body, specifically at the place where the hollow magneto-fluid seal body is connected to the sealing surface of the vacuum chamber 10. After that, the fixed shaft seat in the hollow shaft magneto-fluid seal 7 is fixed on the outer wall surface of the vacuum chamber 10 through screws. One end of the main shaft 9 passing through the hollow magneto-fluid seal body is fixedly connected to the swing rod 4 via a shrink disc 5. Among them, the shrink disc 5 is installed on the main shaft 9 by pressing, and the shrink disc 5 is also installed inside the swing rod 4 by pressing. Then, the swing rod 4 is connected to the floating joint in the cylinder assembly 1, and the assembly and installation of the entire flap valve are completed. During use, the opening and closing of the flap valve are realized through the telescopic action of the cylinder assembly 1.

[0037] A highly reliable flap valve for vacuum sealing of the present utility model realizes the direct connection of the main shaft 9 from the vacuum side to the atmosphere side by using the hollow shaft magneto-fluid seal 7 and the solid main shaft 9. This connection method has a simple structure, high reliability, low maintenance cost, is applicable to various vacuum systems, and has a wide application prospect.

[0038] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the inspiration of the idea of the present utility model shall be included within the scope of the protection of the rights of the present utility model.

Claims

1. A flap valve for high-reliability vacuum sealing, comprising a cylinder assembly (1), a main shaft (9), and a sealing door plate assembly (2) connected to the main shaft (9). The two axial ends of the main shaft (9) are respectively connected to the cylinder assembly (1) through an end connection device, enabling the cylinder assembly (1) to drive the main shaft (9) and the sealing door plate assembly (2) to rotate via the two end connection devices, thereby realizing the opening and closing of the valve of the vacuum chamber (10); characterized in that: The described end connection device includes a hollow shaft magnetic fluid seal (7) and a swing rod (4) sleeved on the main shaft (9). The hollow shaft magnetic fluid seal (7) includes a hollow magnetic fluid seal body and a fixed shaft seat which are nested inside and outside. The fixed shaft seat is fixed on the outer wall surface of the vacuum chamber (10) by bolts. The hollow magnetic fluid seal body is sleeved between the main shaft (9) and the fixed shaft seat, and is fixedly connected to the main shaft (9) through a C-shaped key (6). The end of the main shaft (9) extending out of the hollow shaft magnetic fluid seal (7) is fixedly connected to the swing rod (4) through a shrink disc (5). The swing rod (4) is connected to the floating joint in the cylinder assembly (1), so that the cylinder assembly (1) can drive the main shaft (9) and the hollow magnetic fluid seal body to rotate in the fixed shaft seat through the swing rod (4) and the shrink disc (5).

2. The flap valve for high-reliability vacuum sealing according to claim 1, wherein: The described sealing door panel assembly (2) is fixed on the main shaft (9) through a plurality of connection units (3), and the plurality of connection units (3) are evenly arranged left and right in the axial direction of the main shaft (9).

3. The flap valve for high-reliability vacuum sealing according to claim 2, wherein: The described connection unit (3) is composed of a positioning module and a connection module. The positioning module includes a positioning block (301) at the upper end and a clamp ring (302) at the lower end. The positioning block (301) is fixed on the outer side wall of the vacuum chamber (10) by screws. The clamp ring (302) is sleeved on the main shaft (9). The connection module includes two fixed blocks (303) symmetrically arranged at the axial two ends of the clamp ring (302) and a connection block (304) connected to the lower ends of the two fixed blocks (303). The upper end of each fixed block (303) is fixed on the main shaft (9) by screws, and the lower end is connected to the sealing door panel assembly (2) through an adjusting bolt (305). The connection block (304) is arranged between the two fixed blocks (303) and is connected to the sealing door panel assembly (2) by screws. A pin shaft is respectively extended outward at the left and right ends of the connection block (304), and the two pin shafts can respectively cooperate with the preset shaft holes on the two fixed blocks (303) to realize the rotational connection between the connection block (304) and the two fixed blocks (303).

4. A flap valve for high-reliability vacuum sealing according to claim 3, characterized in that: In the positioning module, there is a clearance fit between the clamp ring (302) and the main shaft (9), and a bearing through which the main shaft (9) passes is also sleeved on the inner side of the clamp ring (302).

5. A flap valve for high-reliability vacuum sealing according to claim 3, characterized in that: The described sealing door panel assembly (2) is provided with a groove for accommodating the fixed block (303) and the connection block (304).

6. The flap valve for high-reliability vacuum sealing according to claim 3, characterized in that: The thickness of the described connection block (304) is the same as the thickness of the lower end of the fixed block (303).

7. A flap valve for high-reliability vacuum sealing according to claim 3, characterized in that: The number of adjusting bolts (305) in each connection unit (3) is four, and the four adjusting bolts (305) are symmetrically arranged left and right. By controlling the threaded connection depth of the adjusting bolts (305) at different positions with the sealing door panel assembly (2), the valve angle of the vacuum chamber (10) can be adjusted.

8. A flap valve for high-reliability vacuum sealing according to claim 1, characterized in that: One end of the hollow magnetic fluid seal body close to the swing rod (4) extends out of the fixed shaft seat, and the C-shaped key (6) is arranged at the end of the hollow magnetic fluid seal body extending out of the fixed shaft seat.

9. A flap valve for high-reliability vacuum sealing according to claim 1 or 8, characterized in that: The described C-shaped key (6) is clamped in a preset groove at the end of the hollow magnetic fluid seal body, and the C-shaped key (6) is fixedly connected to the main shaft (9) through bolts.

10. A flap valve for high-reliability vacuum sealing according to claim 1, characterized in that: An O-ring seal (8) for enhancing the seal is also provided inside the hollow magnetic current seal body.

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