Casing pipe end sealing structure

Abstract

The utility model relates to the technical field of sleeve sealing, in particular to a sleeve end sealing structure which comprises an assembly frame, an upper cover arranged above a lower cover, a lock nut arranged at the top of a stud, a first circular groove formed in the middle of a convex column, a guide column arranged in the middle of the first circular groove, a sealing washer arranged in the first circular groove, and a clamping groove formed in the lower surface of the upper cover and corresponding to the convex column. A guide hole is formed in the middle of the upper surface of the upper cover; according to the sleeve end sealing structure, the inserting columns are matched with the sleeve grooves in the lower cover in an inserted mode, the studs penetrate through the penetrating holes and the limiting holes in the sealing gasket to be in threaded connection with the corresponding lock nuts, and therefore the lower cover and the inserting columns on the assembling frame are matched in an inserted mode, and the upper cover and the lower cover are matched in an inserted mode through the protruding columns and the clamping grooves. The upper cover and the lower cover are fixedly installed under the cooperation of the fastening screws, the upper cover and the guide columns are stably fixed under the cooperation of the special-shaped screws, and the lower cover is fixedly installed and matched in a double-layer mode under the cooperation of the lock nuts.

Description

Technical Field

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

[0002] High-voltage equipment operates with its main body sealed. Transformer outgoing bushings need to be sealed and protected to reduce end damage from affecting cable connections.

[0003] The utility model with announcement number CN207442418U discloses an end sealing structure for an ultra-high voltage direct current through-wall bushing. The end sealing structure includes a bushing with a receiving cavity, a connecting flange that covers the end of the bushing, and a conductive rod coaxially arranged with the bushing. The conductive rod has a conductive rod protruding section that passes through a conductive rod through hole on the connecting flange. A tensioning device is provided on the side of the connecting flange facing away from the bushing. A sealing cover is provided on the connecting flange to cover the tensioning device and the conductive rod protruding section. The sealing cover is in a sealing fit with the connecting flange.

[0004] The above technical solution provides a static seal between the sealing cover and the connecting flange. The sealing structure is simple, the sealing reliability is high, and it is easy to implement. Even if the sealing structure between the conductive rod and the connecting flange fails, leakage of the insulating medium can be effectively avoided. However, the sleeve end does not have a double-layer fixed fit to increase the stability of the assembly installation, reduce the entry of external rainwater into the end, and cannot provide a seal, thus increasing the service life of the seal. Utility Model Content

[0005] The purpose of this invention is to provide a sleeve end sealing structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A sleeve end sealing structure includes an assembly frame, a pin on the top of the assembly frame, a lower cover fitted above the pin, an upper cover above the lower cover, studs symmetrically arranged on the top of the pin, lock nuts on the top of the studs, a protrusion on the upper surface of the lower cover, a first circular groove in the middle of the protrusion, symmetrical through holes at the bottom of the first circular groove, a guide post in the middle of the first circular groove, a sealing gasket in the first circular groove, a sleeve groove at the bottom of the lower cover corresponding to the pin, a retaining groove on the lower surface of the upper cover corresponding to the protrusion, a guide hole in the middle of the upper surface of the upper cover, an installation groove at the center of the upper surface of the upper cover, and a pressure cap in the installation groove.

[0008] Furthermore, the insert is welded and fixed to the assembly frame, and the outer wall of the insert is symmetrically provided with arc-shaped blocks near the top, and the inner wall of the sleeve is provided with arc-shaped grooves corresponding to the arc-shaped blocks.

[0009] In this invention, the arc-shaped block and the arc-shaped groove are interlocked, which increases the stability of the insertion of the post and the bottom sleeve groove of the lower cover, and facilitates stable corresponding insertion and assembly.

[0010] Specifically, the outer diameter of the sealing washer is adapted to the inner diameter of the first circular groove, a through hole is provided in the first circular groove corresponding to the stud, a limit hole is provided on the sealing washer corresponding to the through hole, and the lock nut is threadedly connected to the stud.

[0011] In this invention, the sealing washer is fitted with a limiting hole, which helps the stud to pass through the limiting hole and connect with the corresponding lock nut thread. The sealing washer and the first circular groove are inserted to seal the bottom. The sealing washer increases the stability of the lower cover and the stud assembly, thereby increasing the sealing performance of the lower cover and the assembly frame assembly.

[0012] Preferably, the guide post is welded to the lower cover, the top of the guide post passes through the upper cover, the slot at the bottom of the upper cover is inserted into the protrusion, and the lower cover and the upper cover are fixedly installed by fastening screws.

[0013] In this utility model, a limiting hole is opened in the middle of the sealing gasket, and the guide post passes through the limiting hole, so that the sealing gasket can be sleeved on the guide post. The sealing gasket is inserted into the first circular groove to increase the tightness of the installation with the lower cover. The slot and the protrusion are inserted into each other to achieve a tight insertion fit between the upper cover and the lower cover. With the fastening bolts, the upper cover and the lower cover can be stably assembled and installed.

[0014] It should be noted that the mounting groove is symmetrically provided with screw grooves, the outer diameter of the pressure cap is adapted to the inner diameter of the mounting groove, the upper surface of the pressure cap is provided with countersunk holes corresponding to the screw grooves, and each countersunk hole is provided with a fixing bolt. The middle of the upper surface of the pressure cap is provided with a second circular groove corresponding to the guide post.

[0015] In this invention, the gland and the mounting groove are plugged together to increase the tightness of the mounting groove and the guide post combination. The sealant applied between the gland and the mounting groove further increases the sealing between the bottom of the gland and the guide post, reducing the impact of water leakage. The guide post passes through the second circular groove, which helps to connect with the external connection end post. The fixing bolt passes through the countersunk hole and is threaded into the screw groove, increasing the stability of the gland and the top cover installation.

[0016] Furthermore, a screw hole communicating with the bottom groove of the upper cover is provided on the outer wall of the upper cover. A special-shaped screw is provided in the screw hole. The special-shaped screw is threadedly connected to the screw hole, and the end of the special-shaped screw is tightly fitted to the outer wall of the guide post.

[0017] In this invention, the shaped screw is threaded into the screw hole, and the end of the shaped screw is tightly fitted with the guide post. Under the action of friction, the guide post is fixed in position on the upper cover. The lock nut is threaded into the stud, which realizes the stability of the installation of the lower cover and the insertion post. The double-layer fixation increases the stability of the overall assembly.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. In this utility model, the insert post and the sleeve groove on the lower cover are inserted into each other, and the arc groove and the arc block are inserted into each other. The stud passes through the through hole and the limiting hole on the sealing washer, and is threadedly connected to the corresponding lock nut, so as to realize the insertion and installation of the lower cover and the insert post on the assembly frame. The upper cover and the lower cover are inserted into each other through the protrusion and the slot, and the upper cover and the lower cover are fixedly installed with the fastening screw. Then, the upper cover is fitted with the pressure cover to increase the sealing between it and the guide post. With the help of the special screw, the upper cover and the guide post are stably fixed. The lower cover is fixedly installed with a double layer with the lock nut.

[0020] 2. This utility model further increases the stability of the combination of the pressure cap and the top cover by setting a fixing bolt that passes through the countersunk hole and is threaded to the screw groove. In addition, the bottom of the pressure cap and the bottom of the mounting groove in the top cover are bonded together with sealant, which increases the tightness of the combination of the guide post and the top cover and reduces the impact of water leakage. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the assembly frame structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the combined structure of the lower cover and the upper cover of this utility model;

[0024] Figure 4 This is a schematic diagram of the combined structure of the lower cover and sealing gasket of this utility model;

[0025] Figure 5 This is a schematic diagram of the combined structure of the top cover and the pressure cap of this utility model;

[0026] Figure 6 This is a bottom view of the lower cover of this utility model;

[0027] Figure 7 This is a schematic diagram of the overall assembly and installation cross-sectional structure of this utility model.

[0028] The meanings of the labels in the diagram are as follows:

[0029] 1. Assembly frame; 10. Insert post; 11. Arc block; 12. Stud; 120. Lock nut;

[0030] 2. Bottom cover; 20. Protruding post; 21. First circular groove; 210. Through hole; 22. Guide post; 23. Sealing gasket; 230. Limiting hole; 231. Through groove; 24. Sleeve groove; 240. Arc groove;

[0031] 3. Top cover; 30. Mounting slot; 300. Threaded groove; 31. Threaded hole; 310. Special-shaped screw;

[0032] 4. Pressure cap; 40. Second circular groove; 41. Countersunk hole; 410. Fixing bolt. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figures 1-7 This embodiment provides a technical solution:

[0035] A sleeve end sealing structure includes an assembly frame 1. The top of the assembly frame 1 is provided with a plug 10. A lower cover 2 is sleeved on the top of the plug 10. An upper cover 3 is provided on the top of the lower cover 2. The top of the plug 10 is symmetrically provided with studs 12. The top of the studs 12 is provided with lock nuts 120. The upper surface of the lower cover 2 is provided with a protrusion 20. The protrusion 20 has a first circular groove 21 in the middle. A guide post 22 is welded and fixed to the lower cover 2. The top of the guide post 22 passes through the upper cover 3. The slot at the bottom of the upper cover 3 is inserted and engaged with the protrusion 20. The lower cover 2 and the upper cover 3 are fixedly installed by fastening screws.

[0036] In this utility model, a limiting hole 230 is provided in the middle of the sealing gasket 23, and the guide post 22 passes through the limiting hole 230, so that the sealing gasket 23 can be sleeved on the guide post 22. The sealing gasket 23 is inserted into the first circular groove 21 to increase the tightness of the installation with the lower cover 2. The slot and the protrusion 20 are inserted into each other to realize the tight insertion of the upper cover 3 and the lower cover 2. With the fastening bolts, the upper cover 3 and the lower cover 2 are stably assembled and installed.

[0037] Furthermore, the bottom of the first circular groove 21 is symmetrically provided with through holes 210, the middle of the first circular groove 21 is provided with a guide post 22, the first circular groove 21 is provided with a sealing washer 23, the outer diameter of the sealing washer 23 is adapted to the inner diameter of the first circular groove 21, the first circular groove 21 is provided with through holes 210 corresponding to the stud 12, the sealing washer 23 is provided with limit holes 230 corresponding to the through holes 210, and the lock nut 120 is threadedly connected to the stud 12.

[0038] In this utility model, the sealing washer 23 is fitted with a limiting hole 230, which helps the stud 12 to pass through the limiting hole 230 and be threadedly connected to the corresponding lock nut 120. The sealing washer 23 is inserted into the first circular groove 21 to seal the bottom. The sealing washer 23 increases the stability of the combination of the lower cover 2 and the stud 10, thereby increasing the sealing performance of the combination of the lower cover 2 and the mounting frame 1.

[0039] It should be noted that a sleeve groove 24 is provided at the bottom of the lower cover 2 corresponding to the insertion post 10. The insertion post 10 is welded and fixed to the assembly frame 1. An arc-shaped block 11 is symmetrically provided on the outer wall of the insertion post 10 near the top. An arc groove 240 is provided on the inner wall of the sleeve groove 24 corresponding to the arc-shaped block 11.

[0040] In this utility model, the arc-shaped block 11 and the arc-shaped groove 240 are inserted and matched to increase the stability of the insertion post 10 and the bottom sleeve groove 24 of the lower cover 2, and facilitate the stable insertion and assembly of the corresponding parts.

[0041] Furthermore, the lower surface of the upper cover 3 is provided with a slot corresponding to the protrusion 20, the upper surface of the upper cover 3 is provided with a guide hole in the middle, and the upper surface of the upper cover 3 is provided with an installation groove 30 at the center, and a pressure cap 4 is provided in the installation groove 30.

[0042] Secondly, the mounting groove 300 is symmetrically provided in the mounting groove 30, the outer diameter of the pressure cap 4 is adapted to the inner diameter of the mounting groove 30, the upper surface of the pressure cap 4 is provided with countersunk holes 41 corresponding to the screw grooves 300, and each countersunk hole 41 is provided with a fixing bolt 410. The middle of the upper surface of the pressure cap 4 is provided with a second circular groove 40 corresponding to the guide post 22.

[0043] In this utility model, the pressure cap 4 is inserted into the mounting groove 30 to increase the tightness of the combination of the mounting groove 30 and the guide post 22. The sealant between the pressure cap 4 and the mounting groove 30 is applied to further increase the sealing between the bottom of the pressure cap 4 and the guide post 22 and reduce the impact of water leakage. The guide post 22 passes through the second circular groove 40, which helps to connect with the external connection end post. The fixing bolt 410 passes through the countersunk hole 41 and is threadedly connected to the screw groove 300 to increase the stability of the installation of the pressure cap 4 and the upper cover 3.

[0044] Specifically, a screw hole 31 is provided on the outer wall of the upper cover 3, which communicates with the bottom slot of the upper cover 3. A special-shaped screw 310 is provided in the screw hole 31. The special-shaped screw 310 is threadedly connected to the screw hole 31, and the end of the special-shaped screw 310 is tightly fitted to the outer wall of the guide post 22.

[0045] In this utility model, the special-shaped screw 310 is threadedly connected to the screw hole 31, and the end of the special-shaped screw 310 is tightly fitted to the guide post 22. Under the action of friction, the guide post 22 is fixed in position on the upper cover 3. The lock nut 120 is threadedly connected to the screw post 12 to achieve the stability of the installation of the lower cover 2 and the insertion post 10. The double-layer fixation increases the stability of the overall assembly.

[0046] In this embodiment, when using the sleeve end sealing structure, the user first inserts the lower cover 2 with the sleeve groove 24 into the arc block 11 on the insert post 10 through the arc groove 240, and the insert post 10 passes through the lower cover 2. The sealing gasket 23 with the limit hole 230 and the through groove 231 is inserted into the guide post 22 in the first circular groove 21. After taking it out, the user threadedly connects the lock nut 120 to the stud 12 to fix the position of the lower cover 2. Then, the upper cover 3 is inserted into the protrusion 20 through the slot. The user manually fixes the lower cover 2 and the upper cover 3 with the fastening screw to increase the stability of the combination. The guide post 22 passes through the middle position of the upper cover 3. The pressure cap 4 with the second circular groove 40 is installed in the mounting groove 30. The guide post 22 passes out from the second circular groove 40. The top of the guide post 22 is electrically connected to the corresponding terminal post of the outside through the wire to achieve conductive connection.

[0047] The bottom of the pressure cap 4 is bonded to the upper cover 3 with sealant, which increases the sealing performance with the upper cover 3, reduces the impact of water leakage from the gap between the pressure cap 4 and the guide post 22, reduces the entry of water droplets between the lower cover 2 and the upper cover 3, prevents external rainwater from entering and corroding the sealing gasket 23, improves the life of the sealing gasket 23, and makes the seal more reliable. With the cooperation of the fixing bolt 410, the tightness of the combination of the pressure cap 4 and the upper cover 3 is further increased. The special screw 310 is threaded to the screw hole 31, and the end of the special screw 310 is tightly fitted to the guide post 22. Under the action of friction, the tightness between the upper cover 3 and the guide post 22 is fixed, thereby increasing the stability of the combination of the lower cover 2 and the upper cover 3. The overall combination is easy to install. The lock nut 120 is threaded to the stud 12, which increases the stability of the combination of the lower cover 2 and the insert post 10. The lock nut 120 and the special screw 310 provide double anti-reverse, which enhances the sealing effect.

Claims

1. A sleeve end sealing structure, comprising an assembling frame (1), a top of the assembling frame (1) is provided with a plug post (10), a lower cover (2) is sleeved above the plug post (10), and an upper cover (3) is arranged above the lower cover (2), characterized in that: The top of the column (10) is provided with a symmetric stud (12), the top of the stud (12) is provided with a lock nut (120), the upper surface of the lower cover (2) is provided with a convex column (20), the middle of the convex column (20) is provided with a first circular groove (21), the bottom of the first circular groove (21) is symmetrically provided with a through hole (210), the middle of the first circular groove (21) is provided with a guide column (22), the first circular groove (21) is provided with a sealing washer (23), the bottom of the lower cover (2) is provided with a sleeve groove (24) corresponding to the column (10), the lower surface of the upper cover (3) is provided with a clamping groove corresponding to the convex column (20), the upper surface of the upper cover (3) is provided with a guide hole, the center of the upper surface of the upper cover (3) is provided with a mounting groove (30), and the mounting groove (30) is provided with a gland (4).

2. The casing end seal structure of claim 1, wherein: The column (10) is welded and fixed with the assembly frame (1), the outer wall of the column (10) is symmetrically provided with an arc block (11) near the top, and the inner wall of the sleeve groove (24) is provided with an arc groove (240) corresponding to the arc block (11).

3. The casing end seal structure of claim 1, wherein: The outer diameter of the sealing washer (23) is matched with the inner diameter of the first circular groove (21), the first circular groove (21) is provided with a through hole (210) corresponding to the stud (12), the sealing washer (23) is provided with a limiting hole (230) corresponding to the through hole (210), and the lock nut (120) is threadedly connected with the stud (12).

4. The casing end seal structure of claim 1, wherein: The guide column (22) is welded and fixed with the lower cover (2), the guide column (22) passes through the upper cover (3), the clamping groove at the bottom of the upper cover (3) is inserted and matched with the convex column (20), and the lower cover (2) and the upper cover (3) are fixed and installed by fastening screws.

5. The casing end seal structure of claim 1, wherein: The mounting groove (30) is symmetrically provided with a screw groove (300), the outer diameter of the gland (4) is matched with the inner diameter of the mounting groove (30), the upper surface of the gland (4) is provided with a counterbore (41) corresponding to the screw groove (300), the counterbores (41) are all provided with fixing bolts (410), and the upper surface of the gland (4) is provided with a second circular groove (40) corresponding to the guide column (22).

6. The casing end seal structure of claim 1, wherein: The outer wall of the upper cover (3) is provided with a screw hole (31) in communication with the clamping groove at the bottom of the upper cover (3), the screw hole (31) is provided with a special-shaped screw (310), the special-shaped screw (310) is threadedly connected with the screw hole (31), and the end of the special-shaped screw (310) is tightly attached to the outer wall of the guide column (22).

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