Internal expansion type hole channel plugging device, plugging system and device with sealing hole

Abstract

The utility model belongs to the technical field of pipe system plugging accessories and pipe plugs, and particularly relates to an internal expansion type hole channel plugging device, a plugging system and a device with a sealing hole. The internal expansion type hole channel plugging device comprises a sealing sleeve and an inner core preset in the sealing sleeve, the sealing sleeve is provided with a closed blocking end face at the far end and an extrusion and expansion side wall formed by extending from the edge, the extrusion and expansion side wall is provided with a conical inner surface, and the inner core is provided with a conical outer surface and an axial threaded hole. A pulling tool is screwed into the threaded hole to apply axial pulling force, so that the conical surfaces extrude each other to cause radial expansion of the sealing sleeve to realize hole channel sealing. The hole channel plugging device can be matched with a rivet nut gun to carry out convenient and reliable hole channel plugging operation. The hole channel plugging technology is suitable for industrial products needing straight hole sealing, such as electric driving devices, injection molds and power battery modules, has the characteristics of high sealing reliability, operation convenience and clean plugging, and effectively solves the problems of scrap pollution, sealing failure and the like of a traditional plugging technology.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of pipe system plugging accessories and pipe plug, specifically relates to an internal expansion type hole plugging device, a plugging system and a device with a sealed hole. BACKGROUND

[0002] Hole plugging devices are widely used in the fields of mechanical manufacturing, automobile industry, energy facilities, etc. In the field of mechanical manufacturing, they are used to close various process holes to maintain system integrity; in the automobile industry, they ensure the reliable sealing of key channels such as oil lines and gas lines; in energy equipment, they need to withstand the dynamic load of high-pressure medium to ensure stable delivery. In recent years, hole plugging devices have become an important basic component in the sealing link of industrial equipment due to their multi-scene adaptability, functionality, and operational convenience.

[0003] The sealing performance and structural reliability of hole plugging devices, as key technical indicators for ensuring the safety of industrial production, have always been one of the important improvement directions in the industry. Specifically, in the field of high-pressure hydraulic systems, oil leakage can cause a sudden drop in system pressure and power transmission failure, resulting in decreased equipment operating efficiency and faults; in application scenarios involving flammable, explosive, or toxic medium sealing, plugging failure can cause major safety accidents such as fires and explosions, directly threatening personnel health and safety and enterprise property safety.

[0004] Operational convenience, as an important technical indicator for optimizing industrial production processes, has a significant impact on the efficiency of hole plugging operations, and therefore is also one of the important improvement directions for hole plugging devices. Specifically, hole plugging devices should be adapted to standard straight hole shapes as much as possible, eliminating auxiliary structures such as anti-slip steps or limiting grooves, to simplify hole processing. Secondly, hole plugging devices should be in a functional ready state at all times to eliminate on-site assembly steps and the resulting process uncertainties. Thirdly, the actuator for plugging the hole should be compatible with common industrial tools as much as possible. The current pull-off type hole plugging device and the threaded rod type operation hole plugging device already have mature supporting tools. The pull-off type operation hole plugging device is described in patent CN111828631A, and the threaded rod type operation hole plugging device is described in patent CN117781076A.

[0005] In some applications requiring high cleanliness, such as medical devices, food processing production lines, biopharmaceutical systems, and semiconductor manufacturing equipment, the cleanliness of hole plugging becomes a key performance indicator. In such scenarios, micron-sized debris generated during the plugging process can cause product contamination, precision component failure, and other risks. In traditional plugging techniques, plugging methods such as screwing in, knocking in, and tensioning are prone to generate particles due to intermetallic friction and leave them inside the hole.

[0006] Therefore, it has important practical significance to develop a hole plugging device and a hole plugging method which can balance high reliability sealing, operation convenience and clean and pollution-free. Utility model content

[0007] In view of the deficiencies in the prior art, the utility model provides an internal expansion type hole plugging device, a plugging system and a device with a sealed hole.

[0008] The utility model discloses a first aspect provides an internal expansion type hole plugging device, including the sealed sleeve of being placed into the hole and the inner core of being kept in the sealed sleeve in advance, sealed sleeve and inner core are one metal spare, sealed sleeve has the closed barrier end face of far -end and the extrusion lateral wall formed from the edge of barrier end face extension to the proximal end, still have the opening in the proximal end of sealed sleeve, to allow the pulling force tool of outside to reach the inner core in sealed sleeve, the inner surface of extrusion lateral wall is at least partial conical inner surface, in the direction of proximal end, the radial dimension of conical inner surface reduces, and the thickness of extrusion lateral wall where conical inner surface is located increases, inner core has the outer surface of the circumference side, wherein at least partial conical outer surface, and the radial dimension of conical outer surface reduces in the direction close to the proximal end, inner core has the threaded hole of axial arrangement, to be connected with the threaded cooperation of pulling force tool, when plugging the hole, inner core moves to the proximal end relative to sealed sleeve under the action of pulling force, causes conical outer surface to extrude conical inner surface, makes sealed sleeve radial expansion extrusion the inner wall of hole. Based on the above structure, the beneficial effects of the hole plugging device include: high reliability sealing, operation convenience and clean and pollution-free inside hole can be balanced.

[0009] As a further optimization scheme of the internal expansion type hole plugging device, the threaded hole penetrates the inner core in the axial direction. This structure can balance the air pressure inside and outside the hole plugging device and eliminate the influence of pressure difference on the connection stability.

[0010] As a further optimization scheme of the internal expansion type hole plugging device, part of the outer surface of the inner core is a cylindrical outer surface, which is connected to the distal end of the conical outer surface. Part of the inner surface of the extrusion lateral wall is a cylindrical inner surface, which is connected to the distal end of the conical inner surface. By cylindrical surface cooperation, additional frictional resistance is provided to improve the anti-vibration and anti-impact stability of the inner core and the sealing sleeve.

[0011] As a further optimization scheme of the internal expansion type hole plugging device, the barrier end face and the extrusion lateral wall are transitionally connected on the outside to form a ring-shaped guide transition surface. This structure can reduce the risk of edge scratching the inner wall of the hole.

[0012] As a further optimization scheme of the hole plugging device, the included angle between the generatrix of the conical outer surface of the inner core and the axis is preferably in the range of 1.5° to 9.5°, and more preferably in the range of 2.0° to 8.5°.

[0013] The utility model discloses a second aspect provides a kind of hole plugging system, including above-mentioned internal inflation type hole plugging device and as tension tool's pull rivet nut gun;Pull rivet nut gun has gun head and threaded pull rod, threaded pull rod can be circumferentially rotated and axially telescopic relative gun head.

[0014] As further optimization scheme of plugging system, the edge of the proximal end face of the inner core has a proximal end protruding locking portion;The proximal end face of the sealing sleeve is transitionally connected with the inner surface of the extruded side wall, forming a proximally open horn-shaped expansion surface;The end of the gun head has a contact end face for contacting the proximal end face of the sealing sleeve, and a ring-shaped guide slope protruding distally is also formed on the contact end face;When plugging the hole, the contact end face contacts the proximal end face of the sealing sleeve, a gap is formed between the guide slope and the expansion surface, and the locking portion is at least partially extruded and filled into the gap to expand radially. By this radial expansion, a mechanical interlocking structure is formed, which significantly improves the stability of the hole plugging device against vibration impact.

[0015] As further optimization scheme of plugging system, the locking portion has a plurality of annular arrangements along the edge of the proximal end face of the inner core. This split locking structure can reduce the resistance to eversion and strengthen the interlocking strength.

[0016] The utility model discloses a third aspect provides a variety of devices with sealed hole, including at least one with outer surface and from outer surface to the inside extension forms hole part, installs in hole any one of above-mentioned internal inflation type hole plugging device. For example, the device with sealed hole is electric drive device and the electric vehicle with such electric drive device, injection mold, power battery module and contain such module's new energy vehicle, internal combustion engine cylinder and the power device with such internal combustion engine cylinder body, etc.

[0017] Taking the electric drive shell of the electric vehicle as an example, the hole is formed on the electric drive shell and communicates with the cooling liquid channel or the reducer lubricating oil passage inside; the internal inflation type hole plugging device is sealed and installed in the hole, and is used for isolating the cooling liquid channel or the lubricating oil passage from the external environment of the electric drive shell. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structural schematic diagram of hole plugging device in embodiment 1.

[0019] Figure 2 It is the structural schematic diagram of sealing sleeve in embodiment 1.

[0020] Figure 3 It is the structural schematic diagram of inner core in embodiment 1.

[0021] Figure 4 It is the structural schematic diagram of the hole to be plugged in embodiment 1.

[0022] Figure 5Structure diagram of the channel plug in Example 2.

[0023] Figure 6 Structure diagram of the sealing sleeve in Example 2.

[0024] Figure 7 Structure diagram of the inner core in Example 2.

[0025] Figure 8 Structure diagram of the channel plug in Example 3.

[0026] Figure 9 Structure diagram of the sealing sleeve in Example 3.

[0027] Figure 10 Structure diagram of the inner core in Example 3.

[0028] Figure 11 Structure diagram of the channel plug after expansion in Example 3.

[0029] Figure 12 Structure diagram of the inner core with discontinuous locking portion in Example 3.

[0030] Figure 13 Structure diagram of the rivet nut gun.

[0031] Figure 14 Structure diagram corresponding to the state of the plugging step B1.

[0032] Figure 15 Structure diagram corresponding to the state of the plugging step B2.

[0033] Figure 16 Structure diagram corresponding to the state of the plugging step B3.

[0034] Figure 17 Structure diagram corresponding to the state of the plugging step B4.

[0035] Figure 18 Structure diagram corresponding to the state of the plugging step B5.

[0036] Figure 19 Structure diagram of the barrel blank used to manufacture the sealing sleeve in Example 7.

[0037] Figure 20 Structure diagram of the state of placing the inner core into the internal cavity of the barrel blank in Example 7.

[0038] Figure 21 Structure diagram of the state of placing the barrel blank into the extrusion die in Example 7.

[0039] Figure 22 Structure diagram of the state of the barrel blank after being shaped by the extrusion die in Example 7.

[0040] In the diagram, 1. Sealing sleeve; 2. Inner core; 4. Cylindrical blank; 5. Extrusion die; 9. Rivet nut gun; 11. Barrier end face; 12. Extrusion side wall; 13. Conical inner surface; 14. Cylindrical inner surface; 15. Expansion surface; 16. Guide transition surface; 21. Conical outer surface; 22. Threaded hole; 23. Cylindrical outer surface; 24. Locking part; 41. Cylindrical bottom; 42. Cylindrical wall; 51. Shaping channel; 52. Shaping cone opening; 91. Gun head; 92. Threaded tie rod; 421. Outer conical surface; 911. Contact end face; 912. Guide slope. Detailed Implementation

[0041] The present invention will be further illustrated by specific embodiments below. These embodiments are exemplary and intended to illustrate the problem and explain the present invention, and are not intended to be limiting.

[0042] To facilitate the description and understanding of the structure of the orifice plugger, the proximal end and distal end are defined with the user as the reference. The end exposed outward after the orifice is plugged, that is, the end facing the user, is the proximal end, and the end facing inward towards the internal medium of the orifice is the distal end.

[0043] Example 1

[0044] like Figures 1 to 4 The illustrated orifice plug includes a sealing sleeve 1 that can be inserted into an orifice and an inner core 2 pre-held within the sealing sleeve 1. Before using the orifice plug to seal the orifice, the inner core 2 is already assembled within the sealing sleeve 1 to form an assembly. When sealing the orifice, the inner core 2 is moved axially relative to the sealing sleeve 1, causing the sealing sleeve 1 to expand radially and thus press against the inner wall of the orifice to be sealed, forming an interference fit sealing effect.

[0045] The inner core 2 is preferably configured to have a higher hardness than the sealing sleeve 1, thereby having higher compressive strength and structural stability. When compressed with the sealing sleeve 1, the plastic deformation is mainly generated in the sealing sleeve 1. Correspondingly, the sealing sleeve 1 is more easily deformed and adapts to the inner wall of the channel when subjected to radial compression from the inner core 2, thereby forming a continuous contact sealing interface in the circumferential direction.

[0046] like Figure 2 As shown, the sealing sleeve 1 is integrally formed, with a flat, closed barrier end face 11 at its distal end and an opening at its proximal end. An extruded sidewall 12 extends from the periphery of the barrier end face 11 towards the proximal end, forming a thin-walled tubular structure. The inner surface of the extruded sidewall 12 is at least partially a conical inner surface 13, for example... Figure 2As illustrated, a conical inner surface 13 is formed near the distal end, and a cylindrical surface of equal diameter is formed near the proximal end. The thickness of the extrusion sidewall 12, where the conical inner surface 13 is located, increases from the distal end to the proximal end; the cavity formed by the barrier end face 11 and the extrusion sidewall 12 is used to pre-hold the inner core 2.

[0047] like Figure 3 As shown, the inner core 2 is approximately cylindrical in shape, having a peripheral outer surface, at least part of which is a conical outer surface 21, for example... Figure 3 As illustrated, its outer surface is basically a conical outer surface 21, and the radial dimension of the conical outer surface 21 decreases in the direction pointing to the proximal end.

[0048] like Figure 3 As shown, the inner core 2 has an axially arranged threaded hole 22, which can be threadedly connected to a tension tool so that the tension tool can apply axial tension to the inner core 2.

[0049] The duct plugging device forms a shape like this before sealing the duct. Figure 1 In the pre-assembled state shown, an axial tensile force is applied to the inner core 2 using a tension tool. Under the action of the tension, the inner core 2 moves towards the proximal end relative to the sealing sleeve 1, causing a wedge-shaped compression between the conical outer surface 21 and the conical inner surface 13. This converts the axial tensile force into a radial expansion force, causing the sealing sleeve 1 to expand radially, compressing the inner wall of the channel and sealing the channel, forming a structure as shown. Figure 4 The blockage status is shown.

[0050] Based on the above structure, this channel plug can balance high sealing reliability, ease of operation, and clean plugging characteristics, as detailed below.

[0051] This orifice plug achieves highly reliable sealing. As described above, the orifice plug employs a dual-component integrated design, comprising only two main structures: a sealing sleeve 1 and an inner core 2. In terms of fit, the internal seal is formed by a wedge-shaped fit between the conical inner surface 13 of the sealing sleeve 1 and the conical outer surface 21 of the inner core 2. Externally, the radial expansion of the sealing sleeve 1 creates a continuous annular contact with the inner wall of the orifice. This minimalist design reduces the number of mating interfaces, minimizing assembly verification steps and potential failure points. Furthermore, the orifice plug forms only a single annular contact interface on its outer periphery and utilizes the wedge-shaped compression between the conical surfaces to convert axial tension into a radially amplified force, causing the sealing sleeve 1 to undergo adaptive plastic deformation against the inner wall of the orifice. This results in a high-strength, high-density compression seal, reducing the risk of leakage and making it suitable for long-term sealing under high-pressure conditions.

[0052] The hole plugging device has excellent operation convenience. In use, it does not need to be assembled on site, and can be operated only by using a conventional hand-held electric tool such as a pull-rivet nut gun 9, without needing to process a step structure for preventing axial sliding or set a rotation-limiting structure in the hole, and can be reliably sealed in an ordinary straight hole, and can easily realize different plugging states of the hole plugging device being flush with, protruding from, or being retracted into the end face of the hole according to actual needs.

[0053] The hole plugging device has excellent clean plugging characteristics. The sealing sleeve 1 is sealed by being radially extruded against the inner wall of the hole, and there is no relative friction between the two, and no debris is generated; the inner core 2 and the sealing sleeve 1 are in friction when moving axially, and even if a small amount of debris is generated, it is completely isolated outside the hole by the sealing sleeve 1, ensuring that the inside of the hole is debris-free and clean. After plugging is completed, a regular plane can be formed towards the inside of the hole, and there is no gap or concave-convex structure in the plane, which is not easy to hide dirt. Therefore, the hole plugging device can be applied to scenes such as hydraulic systems, medical equipment, food processing, and sterile systems that have strict requirements for internal cleanliness.

[0054] Example 2

[0055] As shown in Figures 5 to 7 , further optimization is made on the basis of the hole plugging device of Example 1.

[0056] The inner core 2 is as shown in Figure 7 , and part of the outer surface of the peripheral side is a cylindrical outer surface 23 connected to the distal end of the conical outer surface 21. As shown in Figure 6 , the inner surface of the extruded side wall 12 is part of a cylindrical inner surface 14 connected to the distal end of the conical inner surface 13. As shown in Figure 5 , in the pre-assembled state, the cylindrical inner surface 14 corresponds to the cylindrical outer surface 23. During the plugging operation, the junction between the conical outer surface 21 and the cylindrical outer surface 23 extrudes the inner surface of the sealing sleeve 1, and an additional cylindrical inner surface is formed on the inner surface of the sealing sleeve 1. Strong extrusion force and friction force are generated between this newly formed inner surface and the cylindrical outer surface 23, which can be used to offset the tendency of the inner core 2 to slide distally caused by the wedge-shaped extrusion between the inner core 2 and the sealing sleeve 1, and provide greater redundancy for the connection stability of the inner core 2 and the sealing sleeve 1, and better adapt to harsh use environments such as vibration and impact.

[0057] Further, as shown in Figure 5 and Figure 6 , the blocking end face 11 of the sealing sleeve 1 is transitionally connected to the extruded side wall 12 on the outside to form a ring-shaped guide transition face 16. This transition structure can play a guiding role when the plugging device is placed in the hole, avoiding the generation of debris pollution caused by the edge scratching the inner wall of the hole, and dispersing the contact stress of this part on the inner wall of the hole.

[0058] The threaded hole 22 in the center of the inner core 2 is proximal for matching the pulling force tool, and distal for being closed or open. Preferably, as shown in Figure 5 and Figure 7 The threaded hole 22 penetrates the inner core 2 in the axial direction, which can effectively avoid the formation of a low-pressure sealed cavity between the sealing sleeve 1 and the inner core 2 after the tensile expansion operation. By the threaded hole 22 penetrating through, the internal and external air pressure is balanced, the internal negative pressure and external normal pressure cause the inner core 2 to bear the pressure difference pointing to the distal end, which helps the inner core 2 and the sealing sleeve 1 to always maintain a stable matching state after plugging.

[0059] Preferably, the included angle ∠A between the generatrix of the conical outer surface 21 of the inner core 2 and the axis is in the range of 1.5°-9.5°, further preferably in the range of 2.0°-8.5°, and more preferably in the range of 2.5°-7.5°.

[0060] Example 3

[0061] As shown in Figures 8 to 11 , further optimization is made on the basis of the hole plugging device of Example 1. The inner core 2 has a locking portion 24 protruding proximally on the edge of the proximal end face; the proximal end face of the sealing sleeve 1 and the inner surface of the extruded side wall 12 are transitionally connected to form a trumpet-shaped expansion surface 15 open proximally. When plugging the hole, the tool pulls the inner core 2 proximally and makes the locking portion 24 on the proximal end of the inner core 2 everted and extruded with the trumpet-shaped expansion surface 15 to form interlocking, preventing the inner core 2 from slipping distally after plugging, and significantly improving the connection stability of the inner core 2 and the sealing sleeve 1, which can better adapt to harsh use environments such as vibration and impact.

[0062] The locking portion 24 on the proximal end of the inner core 2 can be a continuous and complete ring as shown in Figures 8 to 11 , or it can be discontinuous. Preferably, the locking portion 24 has multiple ones arranged in a ring along the edge of the proximal end face of the inner core 2. For example, two locking portions 24 are arranged 180° apart from each other, three locking portions 24 are arranged 120° apart from each other, four locking portions 24 are arranged 90° apart from each other, five locking portions 24 are arranged 72° apart from each other, six locking portions 24 are arranged 60° apart from each other, and so on. Figure 12 Three locking portions 24 are shown on the proximal end of the inner core 2, which are arranged 120° apart from each other. Although a complete ring of continuous locking portions 24 can also achieve the interlocking effect, the use of multiple ring-arranged locking portions 24 can reduce the resistance encountered during the eversion of the locking portion 24, especially the circumferential tension that causes resistance to the eversion of the locking portion 24, so that the locking portion 24 can be more fully everted and tightly interlocked with the expansion surface 15, thereby improving the stability of the locking structure.

[0063] Example 4

[0064] The embodiment introduces a hole sealing system, which comprises the hole sealing device in any form of the above embodiments, and further comprises a pull nut gun 9 as a pulling tool. Although the pulling tool capable of forcing the inner core 2 to move proximally relative to the sealing sleeve 1 can be used for sealing operation, it is more convenient to operate the hole sealing system in cooperation with the pull nut gun 9, and the pull nut gun 9 is also a common tool that is easy to obtain and has low cost in daily production.

[0065] As shown in Figure 13 , the pull nut gun 9 is an instrument widely used in industry for installing pull nuts to fasten rivets, and at present, an electric type is widely used, which can be operated by hand. The pull nut gun 9 has a gun head 91 and a threaded pull rod 92, which can rotate circumferentially and axially extend relative to the gun head 91. The circumferential rotation of the threaded pull rod 92 can conveniently screw into the threaded hole 22 of the inner core 2 to achieve quick connection, and quickly rotate out of the threaded hole 22; the axial extension of the threaded pull rod 92 can conveniently apply axial force to the inner core 2 to move the inner core 2 in the sealing sleeve 1.

[0066] As shown in Figure 14 , the end of the gun head 91 of the pull nut gun 9 has an abutting end face 911, which can abut and support the proximal end face of the sealing sleeve 1 when it is expanded, so that the inner core 2 moves proximally relative to the sealing sleeve 1. Further, a ring-shaped guide slope 912 protruding distally can be formed on the abutting end face 911. In the case that the inner core 2 of the hole sealing device has a locking portion 24, the guide slope 912 can guide the radial expansion of the locking portion 24, so that it is pressed into the gap between the guide slope 912 and the expansion face 15, realizing the everted and locked locking portion 24.

[0067] Embodiment 5

[0068] The embodiment introduces a method for operating the hole sealing device using the pull nut gun 9 to seal the hole.

[0069] First, taking the hole sealing device with the locking portion 24 as an example, the following steps are included:

[0070] Step B1: The proximal end of the hole sealing device is opposite to the gun head 91 of the pull nut gun 9, so that the threaded pull rod 92 of the gun head 91 abuts the proximal end of the threaded hole 22, forming the state shown in Figure 14 ;

[0071] Step B2: Start the pull nut gun 9 to rotate and screw the threaded pull rod 92 into the threaded hole 22 until the proximal end face of the sealing sleeve 1 abuts the abutting end face 911 of the gun head 91, forming the state shown in Figure 15 ;

[0072] Step B3: the mobile riv-nut gun 9 places the channel stopper loaded at the gun head 91 into the channel to be sealed, with the distal end of the channel stopper facing the inside of the channel, forming Figure 16 the state shown;

[0073] Step B4: the riv-nut gun 9 is activated to retract the threaded rod 92 relative to the gun head 91, pulling the inner core 2 to move proximally relative to the sealing sleeve 1, causing the sealing sleeve 1 to expand radially and tightly fit with the inner wall of the channel, causing the locking portion 24 to at least partially extrude into the gap formed between the guide slope 912 and the expanded surface 15, forming Figure 17 the state shown;

[0074] Step B5: the riv-nut gun 9 is activated to rotate the threaded rod 92 to unscrew from the threaded hole 22, forming Figure 18 the state shown, completing the sealing of the channel.

[0075] Preferably, in step B3, the abutting end face 911 of the riv-nut gun 9 is abutted to the end face where the channel opening is located, so that the end face where the sealed channel is located is flush with the end face of the channel stopper, which is more regular and beautiful. In addition, the abutting end face 911 of the riv-nut gun 9 can also be separated from the end face where the channel opening is located by a certain distance, so that the channel stopper after sealing protrudes relative to the end face where the channel is located; a gun head 91 with a smaller radial size can also be used as needed, so that the gun head 91 can be inserted into the channel, so that the channel stopper after sealing is retracted relative to the end face where the channel is located.

[0076] For the channel stopper without the locking portion 24 on the inner core 2, the sealing using the riv-nut gun 9 mainly includes the following steps:

[0077] Step A1: the channel stopper is placed into the channel to be sealed, with the distal end of the channel stopper facing the inside of the channel;

[0078] Step A2: a pulling tool is used to abut the proximal end of the sealing sleeve 1 and apply a proximally directed pulling force to the threaded hole 22, pulling the inner core 2 to move proximally relative to the sealing sleeve 1, causing the sealing sleeve 1 to expand radially and tightly fit with the inner wall of the channel;

[0079] Step A3: the pulling tool is removed, completing the sealing of the channel.

[0080] Example 6

[0081] This example introduces a device with a sealed channel, which includes at least one part having an outer surface and extending inwardly from the outer surface to form a channel, and a channel stopper of any type in the above examples is installed in the channel.

[0082] For example, the device with sealed channel is an electric drive device and an electric vehicle with such electric drive device. The electric drive device has an electric drive housing, a channel is formed on the electric drive housing and communicates with an internal cooling liquid passage or a reducer lubricating oil passage; a channel plug is sealingly installed in the channel to isolate the cooling liquid passage or the lubricating oil passage from the environment outside the electric drive housing.

[0083] For example, the device with sealed channel is an injection mold. The mold has an internal cooling flow channel, and the channel plug is used to plug the port channel that does not need to be directly connected with the external cooling circulation system, so as to realize the closed sealing of the end of the flow channel.

[0084] For example, the device with sealed channel is a power battery module and a new energy vehicle containing such module. The power battery module includes a housing part with an internal cooling flow channel, and a channel plug is sealingly installed in a redundant interface channel, such as a redundant interface formed by a parallel branch of the cooling flow channel or a test port.

[0085] For example, the device with sealed channel is an internal combustion engine cylinder block and a power device with such internal combustion engine cylinder block. The channel plug is sealingly installed in the process hole formed in the casting process of the cylinder part.

[0086] Example 7

[0087] This embodiment introduces the manufacturing method of the channel plug in any form in the above embodiments. According to the shape of the inner core 2, the inner core 2 is manufactured by machining or material deformation machining. The barrel blank 4 is manufactured by machining or material deformation machining, as shown in Figure 19 , the barrel blank 4 has a barrel bottom 41 with a distal end and a barrel wall 42 extending from the edge of the barrel bottom 41 to the proximal end; the outer surface of the barrel wall 42 is at least partially machined into an outer tapered surface 421; in the direction pointing to the proximal end, the radial dimension of the outer tapered surface 421 increases, and the thickness of the barrel wall 42 where the outer tapered surface 421 is located increases. The inner core 2 is coaxially placed in the internal cavity of the barrel blank 4, so that the distal end face of the inner core 2 abuts against the inner wall of the barrel bottom 41, as shown in Figure 20 , only one form of inner core 2 is taken as an example in the figure, and the same applies to other forms of inner core 2. As shown in Figure 21 , the barrel blank 4 with the inner core 2 is placed on the extrusion die 5, the extrusion die 5 has a cylindrical shaping channel 51, and a trumpet-shaped shaping taper 52 is provided at the end of the shaping channel 51. An axial pushing force is applied to the proximal end of the inner core 2, forcing the barrel blank 4 to enter the shaping taper 52 and pass through the shaping channel 51, the shaping taper 52 forces the barrel wall 42 to produce radial shrinkage deformation, the outer tapered surface 421 is compressed to form a cylindrical surface, and the inner surface of the barrel blank 4 is compressed to be at least partially tapered, as shown in Figure 22 , the pre-assembled body of the sealing sleeve 1 and the inner core 2 is finally obtained.

[0088] The above embodiments are exemplary, and the purpose is to illustrate the technical concept and characteristics of the utility model, so that those skilled in the art can understand the content of the utility model and implement it, and the protection scope of the utility model cannot be limited thereby. Any equivalent change or modification according to the spirit and essence of the utility model should be covered within the protection scope of the utility model.

Claims

1. An inner dilation passageway occluder characterized by: The device comprises a sealing sleeve (1) which can be inserted into a hole, and an inner core (2) which is pre-held in the sealing sleeve (1); the sealing sleeve (1) and the inner core (2) are both metal parts; the sealing sleeve (1) has a distal closed barrier end face (11) and an extruded side wall (12) which is formed from the edge of the barrier end face (11) and extends proximally; the sealing sleeve (1) also has an opening at the proximal end; the inner surface of the extruded side wall (12) is at least partially a tapered inner surface (13); in the proximal direction, the radial dimension of the tapered inner surface (13) decreases, and the thickness of the extruded side wall (12) in which the tapered inner surface (13) is located increases; the inner core (2) has a peripheral outer surface, at least part of which is a tapered outer surface (21), and the radial dimension of the tapered outer surface (21) decreases in the direction close to the proximal end; the inner core (2) has an axially arranged threaded hole (22); when plugging the hole, the inner core (2) moves proximally relative to the sealing sleeve (1) under the action of tension, causing the tapered outer surface (21) to extrude the tapered inner surface (13), so that the sealing sleeve (1) is radially expanded to extrude the inner wall of the hole.

2. The inner inflatable tunnel plug of claim 1, wherein: The threaded hole (22) extends axially through the inner core (2).

3. The inner inflation conduit occluder of claim 1, wherein: Part of the peripheral outer surface of the inner core (2) is a cylindrical outer surface (23) which is connected to the distal end of the tapered outer surface (21); part of the inner surface of the extruded side wall (12) is a cylindrical inner surface (14) which is connected to the distal end of the tapered inner surface (13).

4. The inner inflation conduit occluder of claim 1, wherein: The barrier end face (11) and the extruded side wall (12) are transitionally connected on the outside to form an annular guide transition face (16).

5. The inner inflation conduit occluder of claim 1, wherein: The included angle between the generatrix of the tapered outer surface (21) of the inner core (2) and the axis is in the range of 2.0°-8.5°.

6. Occlusion system, characterized in that: The device comprises the inner expansion hole plugging device according to any one of claims 1-5 and a pull-up nut gun (9) as a tension tool; the pull-up nut gun (9) has a gun head (91) and a threaded pull rod (92), and the threaded pull rod (92) can rotate circumferentially and extend axially relative to the gun head (91).

7. The occlusion system of claim 6, wherein: The proximal end face of the inner core (2) has a proximally protruding locking portion (24) at the edge; the proximal end face of the sealing sleeve (1) and the inner surface of the extruded side wall (12) are transitionally connected to form a proximally open horn-shaped expansion face (15); the end of the gun head (91) has an abutting end face (911) for abutting against the proximal end face of the sealing sleeve (1), and a distally protruding annular guide slope face (912) is also formed on the abutting end face (911); when plugging the hole, the abutting end face (911) abuts against the proximal end face of the sealing sleeve (1), a gap is formed between the guide slope face (912) and the expansion face (15), and the locking portion (24) is at least partially extruded and filled into the gap to expand radially.

8. The occlusion system of claim 7, wherein: The locking portion (24) has a plurality of annular arrangements along the edge of the proximal end face of the inner core (2).

9. Apparatus having a sealed aperture, characterised in that: The application relates to an inner expansion hole sealing device, comprising at least one part with an outer surface and a hole formed by extending inwardly from the outer surface, wherein the inner expansion hole sealing device of any one of claims 1 to 5 is installed in the hole.

10. The device with a sealed aperture of claim 9, wherein: The part is an electric drive shell of an electric vehicle, the hole is formed on the electric drive shell and communicates with an internal cooling liquid channel or a reducer lubricating oil passage; the hole sealing device is sealingly installed in the hole and is used for isolating the cooling liquid channel or the lubricating oil passage from an external environment of the electric drive shell.

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