CN210014013U

CN210014013U - Inflatable internal expanding type inner hole plugging device

Info

Publication number: CN210014013U
Application number: CN201920806530.3U
Authority: CN
Inventors: 唐瑞波; 洪浩祯; 程志国
Original assignee: SHANGHAI XILI AUTOMATION EQUIPMENT Co Ltd
Current assignee: SHANGHAI XILI AUTOMATION EQUIPMENT Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-02-04
Anticipated expiration: 2029-05-31

Abstract

The utility model discloses an aerify internal expanding formula shutoff hole device, include: the middle of the steel hollow shaft is provided with an air duct and an air charging duct, and the tail end of the steel hollow shaft is connected with an air joint; the rubber air bag is sleeved on the upper surface of the steel hollow shaft, the top end of the rubber air bag is hermetically fixed at the top end of the steel hollow shaft through a first clamping hoop and a central shaft, and the tail end of the rubber air bag is hermetically fixed at the tail top end of the steel hollow shaft through a second clamping hoop; the rubber air bag is provided with at least one expansion part, the expansion part is communicated with the air inflation channel, the outer surface of the expansion part is smooth, and the expansion part plugs an inner hole to be plugged after being inflated and expanded; the stainless steel protective sleeve is sleeved on the outer surface of the rubber air bag; and the fixing flange is fixed on the tail end of the steel hollow shaft through a nut, and the inflatable internal expansion type inner hole plugging device is fixed on automatic equipment through the fixing flange.

Description

Inflatable internal expanding type inner hole plugging device

Technical Field

The utility model relates to the field of machinary, the more specifically formula shutoff hole device that rises in aerifing that says so.

Background

In an automobile manufacturing factory, in the processing and assembling production of parts, all on-line detection is generally carried out on the sealing performance of key parts such as an engine cylinder body, a cylinder cover, a gearbox shell and the like and semi-finished parts in the middle process of assembling and combining. The tightness detection equipment usually automatically plugs the open hole of the part and then fills gas for detection. The part exposed hole is easy to block, the blocking means is simple, but some processing holes are in the engine body, such as a camshaft hole at the middle bearing bush of the engine cylinder body, an oil passage hole of an opening in the bearing bush and the like, the blocking is troublesome, and a professional blocking tool is needed.

In the existing production, the inner hole of the sealing plug is in the deep part in the leakage test, usually, a multi-ring step shaft is adopted, a rubber ring is sleeved outside the step shaft, after the shaft extends into the sealing hole, the step shaft is pulled or pressed, the rubber ring is axially forcibly compressed to enable the rubber ring to radially expand outwards, and the rubber ring is attached to the inner wall of the hole to complete sealing.

The following problems exist with current occlusion devices and methods:

1. the radial expansion amount of the rubber ring is limited by a compression method, the rubber ring is easy to crush by frequent excessive compression,

the rubber ring has short service life, becomes a vulnerable part and needs to be replaced frequently;

2. the pulling pressure required by the deformation of the extrusion rubber ring is large, the step shaft is often pulled and pressed by the oil cylinder, oil pressure equipment is used, and the equipment structure is complex.

3. The step shaft is of a multi-layer step and lantern ring structure, a plurality of manufacturing and assembling parts are manufactured, the assembling structure is relatively complex, the replacement of rubber ring spare parts is troublesome and time-consuming, and the production efficiency is affected.

4. The axial compression and radial expansion reliability of the rubber ring is poor, the plugging is not tight frequently, and the test gas leakage is unqualified.

5. The axial compression and radial expansion of the rubber ring are small, the increase of the radial diameter is only 1-1.5%, the diameter change range of the plugging shaft deformed by extruding the rubber ring by pure machinery is small, the size compatibility is poor, and the plugging shaft must be replaced when products with different apertures are replaced.

SUMMERY OF THE UTILITY MODEL

Because prior art has above-mentioned technical problem, therefore this application provides an aerify internal expanding shutoff hole device, its aim at solve among the prior art plugging device life weak point, the cost consumption is big, production efficiency low, compatible poor problem.

The application adopts the following technical means:

aerify internal expanding shutoff hole device includes: the air inflation device comprises a steel hollow shaft, an air channel and an air inflation channel, wherein the middle of the steel hollow shaft is provided with the air channel and the air inflation channel which is communicated with the air channel and the outer surface of the steel hollow shaft, and the tail end of the steel hollow shaft is connected with an air inflation joint; the cylindrical annular rubber air bag is sleeved on the upper surface of the steel hollow shaft, the top end of the rubber air bag is hermetically fixed at the top end of the steel hollow shaft through a first clamping hoop and a central shaft, and the tail end of the rubber air bag is hermetically fixed at the tail top end of the steel hollow shaft through a second clamping hoop; at least one expansion part is reserved on the rubber air bag, the inner surface of the expansion part is in one-to-one correspondence with the air inflation passages and is communicated with the air inflation passages, the outer surface of the expansion part is smooth, and the expansion part plugs an inner hole to be plugged after being inflated and expanded; the stainless steel protective sleeve is sleeved on the outer surface of the rubber air bag; and the fixing flange is fixed on the tail end of the steel hollow shaft through a locking nut, and the inflatable internal expansion type inner hole plugging device is fixed on automatic equipment through the fixing flange.

Preferably, the inner surface of the first clampband is provided with a plurality of steps, the inner surface of the first clampband is matched with the top end of the steel hollow shaft, the first clampband is provided with a through hole, and the central shaft penetrates through the through hole to fix the clampband on the end head of the steel hollow shaft.

Preferably, the second clampband is an annular band body.

Preferably, the number of the stainless steel protective sleeve is at least one, and the expansion part is positioned on the uncovered part of the stainless steel protective sleeve.

Preferably, a plurality of spaced hollow-out parts are arranged on the stainless steel protective sleeve for the expansion of the expansion part.

By adopting the technical means, the inflatable internal expanding type inner hole plugging device is simple in structure and low in manufacturing cost; compared with the existing mode of extruding and deforming rubber, the inflation expansion mode is more reliable, the damage to the rubber air bag is less, and the service life is longer; the application has stronger compatibility and is suitable for different types of products.

Drawings

FIG. 1 is a schematic structural diagram of the present application;

FIG. 2 is a cross-sectional view of the present application;

fig. 3 is a schematic diagram of the operation of the present application.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Referring to fig. 1 and fig. 2, the inflatable internal expanding type inner hole plugging device in the present embodiment includes a steel hollow shaft 1, a rubber airbag 2, a stainless steel protective sleeve 3, a fixing flange 4, a vent joint 5, and the like. The specific structure is described in detail below.

Referring to fig. 2, an air duct 11 and an air charging duct 12 communicating the air duct 11 with the outer surface of the steel hollow shaft 1 are arranged in the middle of the steel hollow shaft 1, and an air connector 5 is connected to the tail end of the steel hollow shaft 1. The air connector 5 is used to inflate or deflate the airway 11. The inflation channel 12 is an air flow channel for inflating or deflating the rubber air bag.

The cylindrical annular rubber air bag 2 is sleeved on the upper surface of the steel hollow shaft 1. The top end of the rubber air bag 2 is hermetically fixed on the top end of the steel hollow shaft 1 through a first clamping hoop 21 and a central shaft 22. The tail end of the rubber air bag 2 is hermetically fixed at the tail top end of the steel hollow shaft 1 through a second clamping hoop 23. The inner surface of the first clampband 21 is provided with a plurality of steps, the inner surface of the first clampband 21 is matched with the top end of the steel hollow shaft 1, a through hole is formed in the first clampband 21, and the central shaft 22 penetrates through the through hole to fix the clampband 21 to the end of the steel hollow shaft 1. The second clampband 23 is an annular band body. The two ends of the rubber air bag 2 are clamped tightly to prevent air leakage.

As shown in fig. 2, at least two expansion positions 24 are reserved on the rubber air bag 2. The inner surface of the expansion part 24 is in one-to-one correspondence with and communicated with the air inflation channel 12, the outer surface of the expansion part 24 is smooth, and the inner hole to be plugged is plugged after the expansion part is inflated. The application is not limited to the number of expansion 24 illustrated in this embodiment. The number and location of the set expansion 24 can be adjusted according to the actual use.

As shown in figure 1, the application also comprises a stainless steel protective sleeve 3 which is sleeved on the outer surface of the rubber air bag 2. The stainless steel protective sleeve 3 is used for limiting the expansion of the section of the rubber air bag and preventing the rubber air bag from being scratched when the inflatable internal expanding type inner hole plugging device is inserted into and used for plugging a hole.

As shown in fig. 1, a fixing flange 4 is fixed on the tail end of the steel hollow shaft 1 through a nut 41, and the inflatable internal expansion type inner hole plugging device is fixed on an automatic device through the fixing flange 4.

As a variant of the present application, the number of stainless steel sheaths 3 may be multiple, the expansion being located in the uncovered portion of each stainless steel sheath. Or a plurality of hollow-out parts at intervals are arranged on the stainless steel protective sleeve 3 for the expansion of each expansion part.

The working principle of the present application is shown in fig. 3:

when the inflatable internal expansion type inner hole plugging device A is inserted into a workpiece 6 to be plugged, the inflation valve is opened to be communicated with the ventilation joint 5 on the inflatable internal expansion type inner hole plugging device, the expansion part 24 of the inflatable internal expansion type inner hole plugging device A expands and bulges during inflation, and the outer wall of the air bag is attached to the inner wall of a hole to be plugged outside to complete plugging. And after the test is finished, closing the inflation valve, discharging high-pressure air in the inflatable internal expansion type inner hole plugging device A, shrinking and recovering the expansion part 24, and taking out the inflatable internal expansion type inner hole plugging device A.

The above-described embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention. Those skilled in the art will recognize that changes and modifications can be made in the invention as described herein without departing from the scope of the invention as defined by the appended claims.

Claims

1. Aerify internal expanding shutoff hole device, its characterized in that includes:

the air inflation device comprises a steel hollow shaft, an air channel and an air inflation channel, wherein the middle of the steel hollow shaft is provided with the air channel and the air inflation channel which is communicated with the air channel and the outer surface of the steel hollow shaft, and the tail end of the steel hollow shaft is connected with an air inflation joint;

the cylindrical annular rubber air bag is sleeved on the upper surface of the steel hollow shaft, the top end of the rubber air bag is hermetically fixed at the top end of the steel hollow shaft through a first clamping hoop and a central shaft, and the tail end of the rubber air bag is hermetically fixed at the tail top end of the steel hollow shaft through a second clamping hoop; at least one expansion part is reserved on the rubber air bag, the inner surface of the expansion part is in one-to-one correspondence with the air inflation passages and is communicated with the air inflation passages, the outer surface of the expansion part is smooth, and the expansion part plugs an inner hole to be plugged after being inflated and expanded;

the stainless steel protective sleeve is sleeved on the outer surface of the rubber air bag;

and the fixing flange is fixed on the tail end of the steel hollow shaft through a locking nut, and the inflatable internal expansion type inner hole plugging device is fixed on automatic equipment through the fixing flange.

2. The device for plugging an inner hole by expanding in an inflation manner as claimed in claim 1, wherein the inner surface of the first clampband is provided with a plurality of steps, the inner surface of the first clampband is matched with the top end of the steel hollow shaft, the first clampband is provided with a through hole, and the central shaft penetrates through the through hole to fix the clampband on the end head of the steel hollow shaft.

3. The inflatable internal expanding plugging bore device of claim 1, wherein said second clamp is an annular body.

4. The inflatable internal expanding plugging device as claimed in claim 1, wherein the number of said stainless steel protective sheath is at least one, and said expansion position is located at the uncovered part of the stainless steel protective sheath.

5. The inflatable internal expanding type inner hole blocking device as claimed in claim 1, wherein a plurality of spaced hollows are arranged on the stainless steel protective sleeve for expanding the expansion part.