Dynamic and static double-sealing device for sealing box chamber penetration piece
By using the dynamic sealing assembly of bearings and elastic oil seals on the sealing box chamber through-piece and the static sealing assembly of the first corrugated seal ring and compression bolt, the wear and assembly difficulties of traditional sealing methods are solved, and the dynamic and static double sealing effect is achieved with an efficient and easy assembly and disassembly effect.
Patent Information
- Application Number
- CN202421720059.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-19
AI Technical Summary
Traditional sealing methods can easily lead to wear and reduce sealing effect during long-term use, and it is difficult to assemble and disassemble the static sealing structure.
The bearing and elastic oil seal are used as the dynamic seal assembly, and the dynamic seal is realized through the combination of the bearing and elastic oil seal. The first corrugated seal ring and the compression bolt are used as the static seal assembly. The axial compression of the corrugated seal ring is expanded radially to achieve a static seal.
Reduces rotation wear, extends dynamic sealing life, improves sealing effect, and simplifies assembly and disassembly processes.
Smart Images
Figure CN222848692U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a sealing device for a penetration piece, in particular to a dynamic and static double sealing device for sealing a chamber penetration piece. Background Art
[0002] Since some experiments or production need to be carried out in special environments, such as pathogens, nuclear radiation, strong acid and alkali atmospheres, such environments are usually not convenient for people to enter. In order to prevent the harmful atmosphere from overflowing, the usual solution is to build a sealed chamber, and all operations or experiments are carried out in the sealed chamber, while personnel operate outside the sealed chamber with the help of special equipment. In this case, it is necessary to open some special holes on the side wall of the sealed chamber and install penetrations. At the same time, it is necessary to ensure that the sealed chamber is in a sealed state during use. Therefore, it is necessary to ensure that a reliable sealing effect must be achieved between the penetration and the side wall of the sealed chamber. The penetration here is most commonly a penetration tube and a drive shaft (generally requiring rotational transmission) and a cable (for electrical control) passing through the penetration tube. The fixed sealing structure between the penetration tube and the side wall of the sealed chamber is between hard parts, which is relatively easy to achieve. The dynamic sealing structure between the drive shaft and the penetration tube is a dynamic sealing structure that needs to rotate. The static sealing structure between the cable and the penetration tube is a combination of soft and hard. It is very difficult to ensure a good sealing effect.
[0003] For the above application scenarios, the traditional sealing method is to use a single lip seal or dust ring to solve the dynamic (here is rotating) sealing problem between the transmission shaft and the end of the through-tube, and to use a single seal to solve the static sealing problem between the cable and the end of the through-tube.
[0004] The above-mentioned traditional sealing method has the following defects: in order to ensure the sealing performance of the dynamic seal, the lip seal ring or the dust ring and the transmission shaft have an interference fit and a line contact assembly relationship. During the long-term continuous rotation of the transmission shaft, the lip seal ring or the dust ring is easily subject to rapid wear, which reduces the sealing effect and easily causes leakage incidents. Moreover, it is impossible to monitor and replace it in real time after wear, further aggravating the hazard of sealing failure. In order to ensure the sealing performance of the static seal, the seal ring must be compressed to ensure a certain amount of interference, so as to achieve a static sealing effect, which will bring about the problem of difficulty in assembly and disassembly. Utility Model Content
[0005] The purpose of the utility model is to provide a dynamic and static double sealing device for sealing a chamber penetration piece, which has good sealing effect and is easy to disassemble and assemble, in order to solve the above problems.
[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:
[0007] A dynamic and static double sealing device for sealing a chamber penetration piece, the penetration piece comprising a penetration tube, a transmission shaft and a cable, the penetration tube passing through the side wall of the sealed chamber, the transmission shaft and the cable passing through the penetration tube, the dynamic and static double sealing device for sealing the chamber penetration piece comprises an outer end cover plate, an inner end cover plate, a dynamic sealing assembly and a static sealing assembly, the outer end of the penetration tube is provided with an integrally formed outer end plate, the outer end cover plate is placed on the outer side of the outer end plate and are connected to each other, the inner end of the penetration tube is provided with an integrally formed inner end plate, the inner end cover plate is placed on the inner side of the inner end plate and are connected to each other, the outer end cover plate, the outer end plate, the inner end plate and the inner end cover plate are parallel to each other and perpendicular to the axial direction of the penetration tube, the outer end of the transmission shaft passes through the outer end cover plate and the outer end plate, the inner end of the transmission shaft passes through the inner end plate and the inner end cover plate, The outer circumferential outer wall of the outer end of the transmission shaft and the corresponding through-hole wall of the outer end cover plate, as well as the inner circumferential outer wall of the transmission shaft and the corresponding through-hole wall of the inner end cover plate are connected respectively through the dynamic sealing assembly, and the dynamic sealing assembly includes bearings and elastic oil seals arranged in sequence in the axial direction of the transmission shaft, the outer end of the cable passes through the outer end cover plate and the outer end plate, the inner end of the cable passes through the inner end plate and the inner end cover plate, the outer circumferential outer wall of the outer end of the cable and the corresponding through-hole wall of the outer end cover plate, as well as the inner circumferential outer wall of the cable and the corresponding through-hole wall of the inner end cover plate are connected respectively through the static sealing assembly, and the static sealing assembly includes a first corrugated sealing ring and a clamping bolt, and the clamping bolt is connected to the internal thread on the corresponding through-hole wall of the outer end cover plate or the inner end cover plate and clamps the corresponding first corrugated sealing ring.
[0008] Preferably, in order to further improve the sealing effect on the outside of the sealing box and facilitate assembly and disassembly, the outer end plate is provided with a through hole except for the position corresponding to the transmission shaft and the cable, and the other positions are closed structures; the inner end plate is provided with a central through hole for the transmission shaft and the cable to pass through together; a part of the dynamic sealing assembly corresponding to the outer end cover plate and a part of the first corrugated sealing ring of the static sealing assembly are respectively placed in the corresponding through holes of the outer end plate; an outer annular step for blocking the first corrugated sealing ring is provided in the wall of the through hole corresponding to the corresponding first corrugated sealing ring on the outer end plate; an inner annular step for blocking the first corrugated sealing ring is provided in the wall of the through hole corresponding to the corresponding first corrugated sealing ring on the inner end cover plate.
[0009] Preferably, in order to facilitate better lubrication of the transmission shaft and to facilitate the filling of lubricating fluid and monitoring of the lubricating fluid pressure to better monitor the sealing performance, an elastic oil seal is respectively installed in the through hole corresponding to the dynamic sealing assembly on the outer end plate and in the corresponding through hole of the outer end cover plate, a lubrication gap for the passage of lubricating fluid is provided between the outer end plate and the outer end cover plate, an annular inner cavity is provided in the outer end plate and the annular inner cavity is connected to the lubrication gap, and a pressure gauge and a one-way valve are respectively installed on the outer cavity wall of the annular inner cavity.
[0010] Preferably, in order to improve the lubricating effect of the lubricating oil and improve the pressure detection accuracy, the lubricating gap is filled with lubricating oil and high-pressure gas.
[0011] Preferably, in order to achieve a better sealing effect, a first O-ring is installed between the outer end plate and the outer end cover plate, and the first O-ring is located outside the position where the transmission shaft, the cable and the annular inner cavity are connected to the lubrication gap.
[0012] Preferably, in order to avoid mutual influence between the bearing and the elastic oil seal, an isolation gasket is provided between the bearing and the elastic oil seal of the dynamic seal assembly.
[0013] Preferably, in order to achieve a better sealing effect, a second O-ring is installed between the inner end plate and the inner end cover plate.
[0014] Preferably, in order to achieve a better sealing effect and facilitate assembly and disassembly, the penetration piece also includes an embedded tube embedded in the side wall of the sealed chamber, the penetration tube passes through the embedded tube, and the dynamic and static double sealing device for the sealed chamber penetration piece also includes a second corrugated sealing ring and a third O-ring. The second corrugated sealing ring is installed between the circumferential outer wall on the penetration tube close to the inner end and the circumferential inner wall on the embedded tube close to the inner end. The outer end of the embedded tube protrudes toward the outer circumferential direction to form an embedded tube convex ring. The circumferential outer wall on the penetration tube close to the outer end is provided with a penetration tube convex ring protruding toward the outer circumferential direction. The penetration tube convex ring is located on the outside of the embedded tube convex ring and is connected by screws. The third O-ring is installed between the penetration tube convex ring and the embedded tube convex ring.
[0015] The beneficial effects of the utility model are:
[0016] The utility model adopts a bearing and an elastic oil seal as a dynamic sealing component, thereby reducing rotational wear and increasing the service life of the dynamic seal while ensuring a dynamic sealing effect, and is easy to assemble and disassemble; adopts a first corrugated sealing ring and a clamping bolt as a static sealing component, and the first corrugated sealing ring is axially compressed by the clamping bolt to cause it to expand radially to achieve a good static sealing effect, and is easy to assemble and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a front sectional view of the dynamic and static double sealing device for sealing the chamber penetration member of the utility model;
[0018] Figure 2 yes Figure 1 Enlarged view of "A". DETAILED DESCRIPTION
[0019] The utility model is further described below in conjunction with the accompanying drawings:
[0020] like Figure 1 and Figure 2 As shown, the penetration member of the utility model includes a penetration tube 5, a transmission shaft 8 and a cable 9. The penetration tube 5 passes through the sealed box chamber ( Figure 1 Only a partial cross section of the side wall 6 is shown. Figure 1 The left side is the inner side and the right side is the outer side, which is consistent with the actual usage situation), the transmission shaft 8 and the cable 9 pass through the through-tube 5. The dynamic and static double sealing device for sealing the chamber penetration member described in the utility model includes an outer end cover plate 16, an inner end cover plate 1, a dynamic sealing assembly and a static sealing assembly. The outer end of the through-tube 5 is provided with an integrally formed outer end plate 15, the outer end cover plate 16 is placed on the outer side of the outer end plate 15 and are connected to each other by screws, the inner end of the through-tube 5 is provided with an integrally formed inner end plate 4, the inner end cover plate 1 is placed on the inner side of the inner end plate 4 and are connected to each other by screws, the outer end cover plate 16, the outer end plate 15, the inner end plate 4 and the inner end cover plate 1 are parallel to each other and perpendicular to the axial direction of the through-tube 5, the outer end of the transmission shaft 8 passes through the outer end cover plate 16 and the outer end plate 15, the inner end of the transmission shaft 8 passes through the inner end plate 4 and the inner end cover plate 1, and the outer end circumferential outer wall of the transmission shaft 8 is The corresponding through-hole walls of the cover plate 16 and the inner end circumferential outer wall of the transmission shaft 8 and the corresponding through-hole walls of the inner end cover plate 1 are connected respectively through the dynamic sealing assembly, and the dynamic sealing assembly includes a bearing 19 and an elastic oil seal 17 arranged in sequence in the axial direction of the transmission shaft 8. The outer end of the cable 9 passes through the outer end cover plate 16 and the outer end plate 15, and the inner end of the cable 9 passes through the inner end plate 4 and the inner end cover plate 1. The outer end circumferential outer wall of the cable 9 and the corresponding through-hole walls of the outer end cover plate 16, and the inner end circumferential outer wall of the cable 9 and the corresponding through-hole walls of the inner end cover plate 1 are connected respectively through the static sealing assembly, and the static sealing assembly includes a first corrugated sealing ring 18 and a clamping bolt 20 (whose screw rod is very short), and the clamping bolt 20 is connected to the internal thread on the corresponding through-hole wall of the outer end cover plate 16 or the inner end cover plate 1 and clamps the corresponding first corrugated sealing ring 18.
[0021] like Figure 1 and Figure 2 As shown, the utility model also discloses the following more optimized specific structures:
[0022] In order to further improve the sealing effect on the outer side of the sealing box and facilitate assembly and disassembly, except for the positions corresponding to the transmission shaft 8 and the cable 9, the other positions on the outer end plate 15 are closed structures. The inner end plate 4 is provided with a central through hole for the transmission shaft 8 and the cable 9 to pass through together. A part of the dynamic sealing assembly corresponding to the outer end cover plate 16 and a part of the first corrugated sealing ring 18 of the static sealing assembly are respectively placed in the corresponding through holes of the outer end plate 15. An outer annular step (not marked in the figure) for blocking the first corrugated sealing ring 18 is provided in the wall of the through hole corresponding to the corresponding first corrugated sealing ring 18 on the outer end plate 15. An inner annular step (not marked in the figure) for blocking the first corrugated sealing ring 18 is provided in the wall of the through hole corresponding to the corresponding first corrugated sealing ring 18 on the inner end cover plate 1. In this way, the first corrugated sealing ring 18 is axially compressed by the clamping bolt 20 to make it expand radially to achieve good sealing.
[0023] In order to facilitate better lubrication of the transmission shaft 8 and to facilitate the filling of lubricating fluid and monitoring of the lubricating fluid pressure to better monitor the sealing performance, an elastic oil seal 17 is respectively installed in the through hole corresponding to the dynamic sealing assembly on the outer end plate 15 and in the corresponding through hole of the outer end cover plate 16, and a lubrication gap (not marked in the figure) for the passage of lubricating fluid is provided between the outer end plate 15 and the outer end cover plate 16. The lubrication gap is very small and can be formed naturally or by partially thinning the corresponding surfaces of the outer end plate 15 and / or the outer end cover plate 16 as needed. An annular inner cavity 12 is provided in the outer end plate 15 and the annular inner cavity 12 is connected to the lubrication gap, and a pressure gauge 14 and a one-way valve 11 are respectively installed on the outer cavity wall of the annular inner cavity 12.
[0024] In order to improve the lubricating effect of the lubricating oil and improve the pressure detection accuracy, the lubricating gap is filled with lubricating oil and high-pressure gas.
[0025] In order to achieve a better sealing effect, a first O-ring 13 is installed between the outer end plate 15 and the outer end cover plate 16. The first O-ring 13 is located outside the position where the transmission shaft 8, the cable 9 and the annular inner cavity 12 are connected to the lubrication gap.
[0026] In order to avoid mutual influence between the bearing 19 and the elastic oil seal 17 , an isolation gasket 21 is provided between the bearing 19 and the elastic oil seal 17 of the dynamic seal assembly.
[0027] In order to achieve a better sealing effect, a second O-ring 2 is installed between the inner end plate 4 and the inner end cover plate 1 .
[0028] In order to achieve a better sealing effect and facilitate assembly and disassembly, the penetration piece also includes an embedded pipe 7 embedded in the side wall 6 of the sealed chamber, and the penetration pipe 5 passes through the embedded pipe 7. The dynamic and static double sealing device for the sealed chamber penetration piece also includes a second corrugated sealing ring 3 and a third O-ring 10. The second corrugated sealing ring 3 is installed between the circumferential outer wall of the penetration pipe 5 near the inner end and the circumferential inner wall of the embedded pipe 7 near the inner end. Corresponding blocking steps are respectively provided on the circumferential outer wall of the penetration pipe 5 and the circumferential inner wall of the embedded pipe 7 to achieve blocking positioning and extrusion sealing of the two ends of the second corrugated sealing ring 3. The outer end of the embedded pipe 7 protrudes in the circumferential direction to form an embedded pipe convex ring (not marked in the figure). The circumferential outer wall of the penetration pipe 5 near the outer end is provided with a penetration pipe convex ring (not marked in the figure) protruding in the circumferential direction. The penetration pipe convex ring is located on the outside of the embedded pipe convex ring and is connected by screws. The third O-ring 10 is installed between the penetration pipe convex ring and the embedded pipe convex ring.
[0029] like Figure 1 and Figure 2 As shown, when applying, place the experimental equipment in a sealed box, that is, Figure 1 On the left side of the middle side wall 6, the staff operates outside the sealed box, that is, Figure 1 The right side of the middle side wall 6 is operated with the aid of special equipment, etc. The rotation transmission between the inside and outside of the sealed box is realized by the transmission shaft 8, the electrical connection between the inside and outside of the sealed box is realized by the cable 9, the sealing between the transmission shaft 8 and the side wall 6 is realized by the above-mentioned dynamic sealing assembly, and the sealing between the cable 9 and the side wall 6 is realized by the above-mentioned static sealing assembly. After the whole dynamic and static double sealing device is assembled, it can be tested. During use, lubricating oil and high-pressure gas can be added to the annular inner cavity 12 through the one-way valve 11 as needed. By observing the pressure value change of the pressure gauge 14, the pressure change in the annular inner cavity 12 can be understood, so as to judge whether the sealing effect between the outer end cover plate 16 and the outer end plate 15 meets the requirements. If the pressure is too low, it means that the sealing effect is deteriorated. Inspection and maintenance can be carried out as needed to avoid safety hazards.
[0030] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.
Claims
1. A dynamic and static double sealing device for a sealed chamber penetration piece, the penetration piece comprising a penetration tube, a transmission shaft and a cable, the penetration tube passes through the side wall of the sealed chamber, the transmission shaft and the cable pass through the penetration tube, characterized in that: The dynamic and static double sealing device for sealing the chamber penetration piece comprises an outer end cover plate, an inner end cover plate, a dynamic sealing assembly and a static sealing assembly, the outer end of the penetration tube is provided with an integrally formed outer end plate, the outer end cover plate is placed on the outer side of the outer end plate and are connected to each other, the inner end of the penetration tube is provided with an integrally formed inner end plate, the inner end cover plate is placed on the inner side of the inner end plate and are connected to each other, the outer end cover plate, the outer end plate, the inner end plate and the inner end cover plate are parallel to each other and perpendicular to the axial direction of the penetration tube, the outer end of the transmission shaft passes through the outer end cover plate and the outer end plate, the inner end of the transmission shaft passes through the inner end plate and the inner end cover plate, the outer end circumferential outer wall of the transmission shaft and the corresponding through hole wall of the outer end cover plate, the inner end circumferential outer wall of the transmission shaft The outer circumferential wall and the corresponding through-hole wall of the inner end cover are respectively connected through the dynamic sealing assembly, and the dynamic sealing assembly includes bearings and elastic oil seals arranged in sequence in the axial direction of the transmission shaft. The outer end of the cable passes through the outer end cover and the outer end plate, and the inner end of the cable passes through the inner end plate and the inner end cover. The outer circumferential outer wall of the outer end of the cable and the corresponding through-hole wall of the outer end cover, and the inner circumferential outer wall of the cable and the corresponding through-hole wall of the inner end cover are respectively connected through the static sealing assembly. The static sealing assembly includes a first corrugated sealing ring and a clamping bolt, and the clamping bolt is connected to the internal thread on the corresponding through-hole wall of the outer end cover or the inner end cover and clamps the corresponding first corrugated sealing ring.
2. The dynamic and static double sealing device for sealing a chamber penetration according to claim 1, characterized in that: Except for the positions corresponding to the transmission shaft and the cable, the other positions on the outer end plate are closed structures. The inner end plate is provided with a central through hole for the transmission shaft and the cable to pass through together. A part of the dynamic sealing assembly corresponding to the outer end cover plate and a part of the first corrugated sealing ring of the static sealing assembly are respectively placed in the corresponding through holes of the outer end plate, and an outer annular step for blocking the first corrugated sealing ring is provided in the wall of the through hole corresponding to the first corrugated sealing ring on the outer end plate, and an inner annular step for blocking the first corrugated sealing ring is provided in the wall of the through hole corresponding to the first corrugated sealing ring on the inner end cover plate.
3. The dynamic and static double sealing device for sealing a chamber penetration according to claim 2, characterized in that: An elastic oil seal is respectively installed in the through hole corresponding to the dynamic sealing assembly on the outer end plate and in the corresponding through hole of the outer end cover plate, a lubrication gap for the passage of lubricating fluid is provided between the outer end plate and the outer end cover plate, an annular inner cavity is provided in the outer end plate and the annular inner cavity is connected with the lubrication gap, and a pressure gauge and a one-way valve are respectively installed on the outer cavity wall of the annular inner cavity.
4. The dynamic and static double sealing device for sealing a chamber penetration according to claim 3, characterized in that: The lubrication gap is filled with lubricating oil and high-pressure gas.
5. The dynamic and static double sealing device for sealing a chamber penetration according to claim 3, characterized in that: A first O-ring is installed between the outer end plate and the outer end cover plate, and the first O-ring is located outside the position where the transmission shaft, the cable, and the annular inner cavity are connected to the lubrication gap.
6. The dynamic and static dual sealing device for sealing a chamber penetration according to any one of claims 1 to 5, characterized in that: An isolation gasket is provided between the bearing and the elastic oil seal of the dynamic seal assembly.
7. The dynamic and static dual sealing device for sealing a chamber penetration member according to any one of claims 1 to 5, characterized in that: A second O-ring is installed between the inner end plate and the inner end cover plate.
8. The dynamic and static dual sealing device for sealing a chamber penetration member according to any one of claims 1 to 5, characterized in that: The penetration piece also includes an embedded tube embedded in the side wall of the sealed chamber, and the penetration tube passes through the embedded tube. The dynamic and static double sealing device for the sealed chamber penetration piece also includes a second corrugated sealing ring and a third O-ring. The second corrugated sealing ring is installed between the circumferential outer wall of the penetration tube close to the inner end and the circumferential inner wall of the embedded tube close to the inner end. The outer end of the embedded tube protrudes toward the outer circumference to form an embedded tube convex ring. The circumferential outer wall of the penetration tube close to the outer end is provided with a penetration tube convex ring protruding toward the outer circumference. The penetration tube convex ring is located on the outside of the embedded tube convex ring and is connected by screws. The third O-ring is installed between the penetration tube convex ring and the embedded tube convex ring.