Reducing sealing baffle device

Abstract

The utility model provides a variable-diameter sealing baffle device which structurally comprises a main body part which is provided with a columnar structure part, a first annular groove and a second annular groove. A first disc is arranged at the position, corresponding to the first annular groove, of the first shaft rod; a second disc is arranged at the position, corresponding to the second annular groove, of the second shaft rod; the multiple first fan-shaped baffles are mounted in the first annular groove, and the multiple first fan-shaped baffles are in sliding connection with the multiple curve grooves of the first disc through cranks; the telescopic part is arranged on the first fan-shaped baffle, and the telescopic part can stretch out of or retract to the end, in the circumferential direction, of the first fan-shaped baffle; and the multiple second fan-shaped baffles are installed in the second annular groove, and the multiple second fan-shaped baffles are in sliding connection with the multiple curve grooves of the second disc through cranks. The variable-diameter sealing baffle device can solve the problems that the sealing performance and the fastening performance of an existing sealing piece are reduced along with changes of the temperature and the environment, and universality is poor.

Description

Technical Field

[0001] The present application relates to the technical field of sealing structures, and in particular to a variable-diameter sealing baffle device. Background Art

[0002] In recent years, with the continuous update and development of the automotive industry, new technologies and products have emerged one after another. Among them, new energy vehicles represented by electric vehicles have developed most rapidly, and the core of electric vehicles is the motor drive system, which is also the power source of electric vehicles.

[0003] In the tests for electric vehicle motor drive systems, such as oil level, oil quantity, lubrication tests, etc., cylindrical seals (such as oil plugs) are usually used in combination with the oil seals at the input or output of the test specimens to achieve the sealing effect. However, the sealing performance and fastening performance of the existing seals are poor. With the changes in test temperature and environment, the sealing performance and fastening performance of the seals will also decrease, resulting in the easy detachment of the seals. In addition, the existing seals have poor versatility. During tests, different sizes and types of seals need to be manufactured according to the changes in the appearance and parameters of the specimens. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a variable-diameter sealing baffle device to solve the problems that the sealing performance and fastening performance of the existing seals will decrease with the changes in temperature and environment, and the versatility is poor.

[0005] According to the present utility model, a variable-diameter sealing baffle device is provided, wherein the variable-diameter sealing baffle device includes: a main body part formed with a columnar structure part, on which a first annular groove and a second annular groove are provided; a first shaft rod axially passing through the main body part, a first disc being provided at a position corresponding to the first annular groove on the first shaft rod, and a plurality of curved grooves being formed on the first disc; a second shaft rod axially passing through the first shaft rod, a second disc being provided at a position corresponding to the second annular groove on the second shaft rod, and a plurality of curved grooves being formed on the second disc; a plurality of first sector baffles installed in the first annular groove, the plurality of first sector baffles being slidably connected to the plurality of curved grooves of the first disc through cranks, and when the first shaft rod rotates, the plurality of first sector baffles can extend or retract radially; a telescopic part provided on the first sector baffle, the telescopic part being able to extend or retract from the circumferential end of the first sector baffle to fill the gap between two adjacent first sector baffles; and a plurality of second sector baffles installed in the second annular groove, the plurality of second sector baffles being slidably connected to the plurality of curved grooves of the second disc through cranks, and when the second shaft rod rotates, the plurality of second sector baffles can extend or retract radially.

[0006] Preferably, the crank is disposed radially along the first sector baffle and the second sector baffle, and a pin is provided at an end of the crank, and the pin is inserted into the curved groove.

[0007] Preferably, a lower end of the first shaft rod is connected to a center of the first disk, and a plurality of the curved grooves are disposed around the center of the first disk; an upper end of the second shaft rod extends out of the first shaft rod, a lower end of the second shaft rod is connected to a center of the second disk, and a plurality of the curved grooves are disposed around the center of the second disk.

[0008] Preferably, a cylindrical groove is axially provided at a center of the columnar structure portion, and the first disk and the second disk are disposed in the cylindrical groove.

[0009] Preferably, the first annular groove and the second annular groove are disposed at intervals, a first through hole communicating with the cylindrical groove is provided at a bottom of the first annular groove, and the crank of the first sector baffle passes through the first through hole; a second through hole communicating with the cylindrical groove is provided at a bottom of the second annular groove, and the crank of the second sector baffle passes through the second through hole..

[0010] Preferably, a end cover is provided at a top end of the main body portion, a threaded hole is axially provided at a center of the end cover, the threaded hole communicates with the cylindrical groove, and a diameter of the end cover is larger than a diameter of the columnar structure portion.

[0011] Preferably, an external thread is provided on an outer surface of the first shaft rod, the first shaft rod is threadedly connected to the threaded hole of the end cover, a first nut is mounted on the first shaft rod, and the first nut is disposed above the end cover; an external thread is provided on an outer surface of the second shaft rod, an internal thread is provided on an inner surface of the first shaft rod, the second shaft rod is threadedly connected to the first shaft rod, and a second nut is mounted on the second shaft rod, and the second nut is disposed above the first shaft rod.

[0012] Preferably, the telescopic portion includes: a sector-shaped flap mounted at a first end in a circumferential direction of the first sector baffle, the sector-shaped flap being capable of extending or retracting from an end of the first sector baffle; an arc-shaped spring mounted inside the first sector baffle, the arc-shaped spring abutting against the sector-shaped flap; and a magnetic member mounted at a second end in the circumferential direction of the first sector baffle, the sector-shaped flap being capable of being adsorbed to the magnetic member.

[0013] Preferably, a sealing ring is provided on an outer periphery of a plurality of the first sector baffles.

[0014] Preferably, a convex edge portion is provided on a side portion of a plurality of the second sector baffles facing the second shaft rod, and a mating groove is provided at a position of the main body portion corresponding to the convex edge portion.

[0015] In the variable-diameter sealing baffle device of the embodiment of the present utility model, a columnar structure part is formed on the main body part, and a first annular groove and a second annular groove are arranged on the columnar structure part. A first shaft rod is axially inserted through the main body part, and a first disc is arranged at the position of the first annular groove. A plurality of curved grooves are formed on the first disc. A second shaft rod is axially inserted through the first shaft rod, and a second disc is arranged at the position corresponding to the second annular groove. A plurality of curved grooves are formed on the second disc. A plurality of first sector baffles are installed in the first annular groove and are connected to the plurality of curved grooves of the first disc through cranks. When the first shaft rod rotates, the plurality of first sector baffles extend or retract radially. This enables the operator to control the movement of the plurality of first sector baffles through the first shaft rod to deal with samples with different parameters. When the temperature and environment change, the operator can tighten the first sector baffles again through the first shaft rod. The telescopic part can be arranged on the first sector baffle, and the telescopic part can extend or retract from the circumferential end of the first sector baffle to fill the gap between two adjacent first sector baffles to achieve the sealing function. A plurality of second sector baffles are installed in the second annular groove, and the plurality of second sector baffles are slidably connected to the plurality of curved grooves of the second disc through cranks. When the second shaft rod rotates, the plurality of second sector baffles extend or retract radially to clamp and fix the main body part to the shell of the sample. In this way, it can effectively solve the problems that the sealing performance and fastening performance of the existing seals will decrease with the change of temperature and environment, and the versatility is poor.

[0016] To make the above objects, features, and advantages of the present application more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. Brief Description of the Drawings

[0017] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the variable-diameter sealing baffle device according to the present utility model.

[0019] Figure 2 It is a cross-sectional view of the variable-diameter sealing baffle device according to the present utility model.

[0020] Figure 3 It is a schematic diagram of the main body part of the variable-diameter sealing baffle device according to the present utility model.

[0021] Figure 4Schematic diagram of the first disc of the variable-diameter sealing baffle device according to the present utility model.

[0022] Figure 5 Schematic diagram of the first sector baffle of the variable-diameter sealing baffle device according to the present utility model.

[0023] Figure 6 Schematic diagram of the second sector baffle of the variable-diameter sealing baffle device according to the present utility model.

[0024] Figure 7 Installation schematic diagram of the first sector baffle of the variable-diameter sealing baffle device according to the present utility model.

[0025] Figure 8 Installation schematic diagram of the second sector baffle of the variable-diameter sealing baffle device according to the present utility model.

[0026] Reference numerals: 1 - main body part; 11 - columnar structure part; 110 - cylindrical groove; 111 - first annular groove; 1110 - first through hole; 112 - second annular groove; 1120 - second through hole; 12 - end cover; 120 - threaded hole; 2 - first shaft rod; 20 - first nut; 21 - first disc; 3 - second shaft rod; 30 - second nut; 31 - second disc; 4 - first sector baffle; 5 - second sector baffle; 50 - convex edge part; 51 - mating groove; 6 - telescopic part; 61 - sector-shaped flap; 62 - arc spring; 63 - magnetic attraction part; 70 - curved groove; 71 - crank; 72 - pin. Detailed implementation manners

[0027] The following detailed implementation manners are provided to help readers obtain a comprehensive understanding of the methods, devices, and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be obvious. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, changes that will be obvious after understanding the disclosure of the present application may be made, except for operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

[0028] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, devices, and / or systems described herein that will be obvious after understanding the disclosure of the present application.

[0029] Throughout the specification, when an element such as a layer, region, or substrate is described as being "on" another element, "connected to" another element, "coupled to" another element, "over" another element, or "covering" another element, it can be directly "on" the other element, "connected to" the other element, "coupled to" the other element, "over" the other element, or "covering" the other element, or there can be one or more other elements intervening therebetween. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly coupled to" another element, "directly over" another element, or "directly covering" another element, there can be no other elements intervening therebetween.

[0030] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of them.

[0031] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or sections, these components, elements, regions, layers, or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, element, region, layer, or section from another. Thus, the first component, element, region, layer, or section described in the examples herein could also be termed the second component, element, region, layer, or section without departing from the teachings of the examples.

[0032] For ease of description, spatial relationship terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another as shown in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientation of "above" and "below" depending on the spatial orientation of the device. The device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and the spatial relationship terms used herein will be interpreted accordingly.

[0033] The terms used herein are for the purpose of describing various examples only and are not intended to limit the examples. Unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. The terms "comprising", "including" and "having" enumerate the stated features, quantities, operations, components, elements and / or combinations thereof that exist, but do not preclude the existence or addition of one or more other features, quantities, operations, components, elements and / or combinations thereof.

[0034] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Accordingly, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacturing.

[0035] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application.

[0036] The present utility model provides a variable-diameter sealing baffle device, as Figures 1 to 8 shown, the variable-diameter sealing baffle device includes a main body portion 1, a first shaft rod 2, a second shaft rod 3, a first sector baffle 4, a telescopic portion 6, and a second sector baffle 5.

[0037] In the following description, reference will be made to Figures 1 to 8 specifically describe the specific structures of the above components of the variable-diameter sealing baffle device and the connection relationships of the above components.

[0038] As Figures 1 to 8As shown, in the embodiment, the main body portion 1 may be formed with a columnar structure portion 11. A first annular groove 111 and a second annular groove 112 may be provided on the columnar structure portion 11. The first shaft rod 2 may axially penetrate through the main body portion 1. A first disk 21 may be provided at a position of the first shaft rod 2 corresponding to the first annular groove 111. A plurality of curved grooves 70 may be formed on the first disk 21. The second shaft rod 3 may axially penetrate through the first shaft rod 2. A second disk 31 may be provided at a position of the second shaft rod 3 corresponding to the second annular groove 112. A plurality of curved grooves 70 may be formed on the second disk 31. A plurality of first sector baffles 4 may be installed in the first annular groove 111. The plurality of first sector baffles 4 may be slidably connected to the plurality of curved grooves 70 of the first disk 21 through a crank 71. Such that when the first shaft rod 2 rotates, the plurality of first sector baffles 4 can radially extend or retract. The telescopic portion 6 may be provided on the first sector baffle 4. The telescopic portion 6 can extend or retract from the circumferential end portion of the first sector baffle 4 to fill the gap between two adjacent first sector baffles 4, so as to achieve the sealing function. A plurality of second sector baffles 5 may be installed in the second annular groove 112. The plurality of second sector baffles 5 may be slidably connected to the plurality of curved grooves 70 of the second disk 31 through a crank 71. Such that when the second shaft rod 3 rotates, the plurality of second sector baffles 5 can radially extend or retract, and further clamp and fix the variable-diameter sealing baffle device to the housing of the sample.

[0039] Preferably, as Figures 1 to 7 shown, in the embodiment, the first sector baffle 4 and the second sector baffle 5 may be approximately sector-annular. The plurality of first sector baffles 4 connected end to end may form a ring, and the plurality of second sector baffles 5 connected end to end may form a ring. The ring formed by connecting the plurality of first sector baffles 4 and the telescopic portion 6 is used to achieve the sealing function. Preferably, a sealing ring may be provided on the outer periphery of the plurality of first sector baffles 4. That is, the sealing ring is provided on the outer periphery of the ring formed by connecting the plurality of first sector baffles 4 to achieve the sealing function.

[0040] Furthermore, preferably, as Figure 1 、 Figure 6 and Figure 8As shown, in the embodiment, a convex edge portion 50 may be provided on the side of each of the plurality of second sector baffles 5 facing the second shaft rod 3. The convex edge portion 50 protrudes from the plate surface of the second sector baffle 5. The protruding portion is located at the edge of the outer circle of the second sector baffle 5, so that after the second sector baffle 5 extends radially, the convex edge portion 50 can function as a claw to clamp and fix the variable-diameter sealing baffle device on the housing of the sample. A mating groove 51 may be provided at the position of the main body portion 1 corresponding to the convex edge portion 50, so that after the second sector baffle 5 retracts into the second annular groove 112, the convex edge portion 50 can just be snapped into the mating groove 51 to ensure the regular shape of the columnar structure portion 11.

[0041] Preferably, as Figure 4 , Figure 7 and Figure 8 shown, in the embodiment, the first disk 21 may be a circular plate member. A plurality of curved grooves 70 may be formed on the plate surface of the first disk 21. Specifically, the number of the curved grooves 70 may be four, and the number corresponds to the number of the first sector baffles 4. The plurality of curved grooves 70 may be arranged around the center of the first disk 21. Similarly, the second disk 31 may be a circular plate member. A plurality of curved grooves 70 may be formed on the plate surface of the second disk 31. Specifically, the number of the curved grooves 70 may be four, and the number corresponds to the number of the second sector baffles 5. The plurality of curved grooves 70 may be arranged around the center of the second disk 31.

[0042] Preferably, as Figures 2 to 8 shown, in the embodiment, the first sector baffle 4 may be slidably connected to the first disk 21 through a crank 71, and the second sector baffle 5 may be slidably connected to the second disk 31 through a crank 71. The crank 71 is arranged along the radial direction of the first sector baffle 4 and the second sector baffle 5. One end of the crank 71 may be connected to the center of the inner circumferential surface of the first sector baffle 4 or the second sector baffle 5. A pin 72 is provided at the other end of one end of the crank 71. The crank 71 realizes the sliding connection between the first sector baffle 4 and the first disk 21 and the sliding connection between the second sector baffle 5 and the second disk 31 by inserting the pin 72 into the curved groove 70 of the first disk 21 or the second disk 31. When the first disk 21 or the second disk 31 rotates, the crank 71 will drive the first sector baffle 4 and the second sector baffle 5 to move.

[0043] Further, preferably, as Figure 1 and Figure 2As shown, in the embodiment, the lower end of the first shaft rod 2 can be connected to the center of the first disc 21 to drive the first disc 21 to rotate. The first disc 21 can be integrally formed with the first shaft rod 2. The second shaft rod 3 can pass through the first shaft rod 2 at the first disc 21. The upper end of the second shaft rod 3 can extend out of the upper end of the first shaft rod 2, and the lower end of the second shaft rod 3 can extend out of the lower end of the first shaft rod 2. The lower end of the second shaft rod 3 can be connected to the center of the second disc 31 to drive the second disc 31 to rotate. The second disc 31 can be integrally formed with the second shaft rod 3.

[0044] Preferably, as Figure 1 and Figure 2 shown, in the embodiment, a cylindrical groove 110 can be axially provided at the center inside the columnar structure portion 11. The first disc 21 and the second disc 31 are arranged in the cylindrical groove 110. The pin 72 of the crank 71 of the first sector baffle 4 can be inserted into the curved groove 70 of the first disc 21 from top to bottom, and the pin 72 of the crank 71 of the second sector baffle can be inserted into the curved groove 70 of the second disc 31 from bottom to top. By respectively rotating the first shaft rod 2 and the second shaft rod 3, the operator can respectively adjust the first sector baffle 4 and the second sector baffle 5.

[0045] Preferably, as Figure 1 and Figure 2 shown, in the embodiment, the first annular groove 111 and the second annular groove 112 can be spaced apart axially in the columnar structure portion 11, and the first annular groove 111 can be arranged above the second annular groove 112. A first through hole 1110 communicating with the cylindrical groove 110 is opened at the bottom of the first annular groove 111, and the first through hole 1110 can be a square hole. The crank 71 of the first sector baffle 4 can pass through the first through hole 1110, so that the first sector baffle 4 can maintain a linear motion during the movement. A second through hole 1120 communicating with the cylindrical groove 110 is opened at the bottom of the second annular groove 112, and the second through hole 1120 can be a square hole. The crank 71 of the second sector baffle 5 can pass through the second through hole 1120, so that the second sector baffle 5 can maintain a linear motion during the movement.

[0046] In addition, preferably, as Figure 1 and Figure 2 shown, in the embodiment, a circular end cap 12 can be provided at the top of the main body portion 1. A threaded hole 120 can be axially opened at the center of the end cap 12, and the diameter of the threaded hole 120 is smaller than the diameters of the first disc 21 and the second disc 31. The threaded hole 120 axially communicates with the top of the cylindrical groove 110. The diameter of the end cap 12 is larger than the diameter of the columnar structure portion 11 to facilitate the disassembly of the reduced-diameter seal baffle device.

[0047] Further, preferably, as Figure 1 and Figure 2 shown, in the embodiment, external threads may be provided on the outer surface of the first shaft rod 2, and the first shaft rod 2 may be threadedly connected to the threaded hole 120 of the end cover 12. Preferably, a first nut 20 may also be installed on the first shaft rod 2, and the first nut 20 is provided on the upper part of the end cover 12. After the first shaft rod 2 is screwed in place, the operator can tighten the first nut 20 to lock the first shaft rod 2 to the end cover 12. External threads may be provided on the outer surface of the second shaft rod 3, and internal threads may be provided on the inner surface of the first shaft rod 2, and the second shaft rod 3 may be threadedly connected to the first shaft rod 2. Preferably, a second nut 30 may also be installed on the second shaft rod 3, and the second nut 30 may be provided on the upper part of the first shaft rod 2. After the second shaft rod 3 is screwed in place, the operator can tighten the second nut 30 to lock the second shaft rod 3 to the first shaft rod 2. Preferably, during the process of screwing the first shaft rod 2, when the first shaft rod 2 moves upward as a whole, the first sector baffle 4 extends outwards. When the first shaft rod 2 moves downward as a whole, the first sector baffle 4 retracts inwards. Similarly, during the process of screwing the second shaft rod 3, when the second shaft rod 3 moves upward as a whole, the second sector baffle 5 extends outwards. When the second shaft rod 3 moves downward as a whole, the second sector baffle 5 retracts inwards.

[0048] In addition, preferably, as Figure 2 、 Figure 5 and Figure 7 shown, in the embodiment, the telescopic part 6 may include a sector-shaped flap 61, an arc spring 62 and a magnetic member 63. Among them, the sector-shaped flap 61 may be installed at the first end in the circumferential direction of the first sector baffle 4 (which may be the right end as shown in Figure 5 ). The sector-shaped flap 61 can extend or retract from the end of the first sector baffle 4. The sector-shaped flap 61 may be inserted into the installation groove at the end of the first sector baffle 4. The arc spring 62 may be installed inside the first sector baffle 4. The arc spring 62 may be arranged along the circumferential direction of the first sector baffle 4, and the end of the arc spring 62 may abut against the inner side surface of the sector-shaped flap 61 to drive the sector-shaped flap 61 to extend outwards. So that when there is a gap between two adjacent first sector baffles 4, the sector-shaped flap 61 can fill the gap under the drive of the arc spring 62. The magnetic member 63 may be installed at the second end in the circumferential direction of the first sector baffle 4 (which may be the left end as shown in Figure 5 ). The magnetic member 63 may be a magnet, and the sector-shaped flap 61 can be adsorbed on the magnetic member 63 to prevent a gap between the sector-shaped flap 61 and the adjacent first sector baffle 4.

[0049] During use, the variable-diameter sealing baffle device can adjust the first sector baffle 4 and the second sector baffle 5 according to the parameters of the sample to adapt to oil seals of various sizes, improving work efficiency, solving the problem of versatility, and reducing production costs. In addition, the operator can also control the movement of the first sector baffle 4 through the first shaft rod 2. When the temperature and environment change, the operator can tighten the variable-diameter sealing baffle device again.

[0050] Finally, it should be noted that the above embodiments are only specific embodiments of the present application, used to illustrate the technical solutions of the present application, rather than limiting it. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed in the present application can still modify the technical solutions recorded in the foregoing embodiments or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A variable-diameter sealing baffle device, characterized in that The variable-diameter sealing baffle device includes: A main body portion, which forms a columnar structure portion, and a first annular groove and a second annular groove are provided on the columnar structure portion; A first shaft rod, which is axially penetrated through the main body portion, and a first disc is provided on the first shaft rod at a position corresponding to the first annular groove, and a plurality of curved grooves are formed on the first disc; A second shaft rod, which is axially penetrated through the first shaft rod, and a second disc is provided on the second shaft rod at a position corresponding to the second annular groove, and a plurality of curved grooves are formed on the second disc; A plurality of first sector baffles, which are installed in the first annular groove, and the plurality of first sector baffles are slidably connected to the plurality of curved grooves of the first disc through cranks. When the first shaft rod rotates, the plurality of first sector baffles can extend or retract radially; A telescopic portion, which is provided on the first sector baffle, and the telescopic portion can extend or retract from the circumferential end of the first sector baffle to fill the gap between two adjacent first sector baffles; and A plurality of second sector baffles, which are installed in the second annular groove, and the plurality of second sector baffles are slidably connected to the plurality of curved grooves of the second disc through cranks. When the second shaft rod rotates, the plurality of second sector baffles can extend or retract radially.

2. The variable-diameter sealing baffle device according to claim 1, characterized in that, The crank is arranged radially along the first sector baffle and the second sector baffle, and a pin is provided at the end of the crank, and the pin is inserted into the curved groove.

3. The variable-diameter seal baffle device according to claim 1, wherein The lower end of the first shaft rod is connected to the center of the first disc, and the plurality of curved grooves are arranged around the center of the first disc; the upper end of the second shaft rod extends out of the first shaft rod, the lower end of the second shaft rod is connected to the center of the second disc, and the plurality of curved grooves are arranged around the center of the second disc.

4. The variable-diameter seal baffle device according to claim 1, characterized in that, A cylindrical groove is axially arranged in the center of the columnar structure portion, and the first disc and the second disc are arranged in the cylindrical groove.

5. The variable-diameter sealing baffle device according to claim 4, characterized in that The first annular groove and the second annular groove are arranged at intervals, a first through hole communicating with the cylindrical groove is opened at the bottom of the first annular groove, the crank of the first sector baffle is penetrated through the first through hole, a second through hole communicating with the cylindrical groove is opened at the bottom of the second annular groove, and the crank of the second sector baffle is penetrated through the second through hole.

6. The variable-diameter seal baffle device according to claim 5, characterized in that, A end cover is provided at the top of the main body portion, a threaded hole is axially opened in the center of the end cover, the threaded hole communicates with the cylindrical groove, and the diameter of the end cover is larger than the diameter of the columnar structure portion.

7. The variable-diameter seal baffle device according to claim 6, characterized in that, External threads are provided on the outer surface of the first shaft rod, and the first shaft rod is threadedly connected to the threaded hole of the end cover. A first nut is installed on the first shaft rod, and the first nut is arranged above the end cover; external threads are provided on the outer surface of the second shaft rod, internal threads are provided on the inner surface of the first shaft rod, the second shaft rod is threadedly connected to the first shaft rod, and a second nut is installed on the second shaft rod, and the second nut is arranged above the first shaft rod.

8. The variable-diameter sealing baffle device according to claim 1, characterized in that, The telescopic portion includes: The sector-shaped baffle is installed at the first end in the circumferential direction of the first sector-shaped baffle, and the sector-shaped baffle can extend or retract from the end of the first sector-shaped baffle; The arc-shaped spring is installed inside the first sector-shaped baffle, and the arc-shaped spring abuts against the sector-shaped baffle; and The magnetic attraction member is installed at the second end in the circumferential direction of the first sector-shaped baffle, and the sector-shaped baffle can be adsorbed on the magnetic attraction member.

9. The variable-diameter sealing baffle device according to claim 8, wherein, A sealing ring is provided on the outer periphery of the plurality of first sector-shaped baffles.

10. The variable-diameter seal baffle device according to claim 1, wherein, Convex edge portions are provided on the side portions of the plurality of second sector-shaped baffles facing the second shaft rod, and mating grooves are provided at positions of the main body portion corresponding to the convex edge portions.

Images