阅读说明：本技术 一种工艺孔用密封塞及密封方法 (Sealing plug for fabrication hole and sealing method ) 是由 林海洋 朱海明 翟亚飞 李情 周泉 于 2020-06-28 设计创作，主要内容包括：一种工艺孔用密封塞,其包括圆球和密封衬套,所述的密封衬套为圆柱形结构,内部设有开口位于顶端的内孔,外周设有多个锯齿环形槽,所述密封衬套塞入所述工艺孔中,所述圆球受到敲击工具的轴向作用力,挤压进入所述密封衬套的内孔,进而使该密封衬套沿径向向外胀开,所述锯齿环形槽的齿尖压入所述工艺孔的内壁,达到密封所述工艺孔的作用。本发明在工艺孔中形成多道圆形密封线,密封性良好,具有结构简单、安装便捷、抗腐蚀和耐高温性能良好的优点,特别适用于斜面、圆柱面、凹面等特殊位置的工艺孔、孔径较小的工艺孔和薄壁零件上的工艺孔。(The utility model provides a sealing plug for fabrication hole, its includes ball and sealing bush, sealing bush be cylindrical structure, inside is equipped with the hole that the opening is located the top, and the periphery is equipped with a plurality of sawtooth ring channels, sealing bush fills in the fabrication hole, the ball receives the axial effort of knocking the instrument, and the extrusion gets into sealing bush's hole, and then makes this sealing bush expand outward along radial, the prong of sawtooth ring channel is impressed the inner wall of fabrication hole reaches sealedly the effect of fabrication hole. The invention forms a plurality of circular sealing lines in the fabrication hole, has good sealing performance, has the advantages of simple structure, convenient installation, good corrosion resistance and high temperature resistance, and is particularly suitable for fabrication holes at special positions such as inclined planes, cylindrical surfaces, concave surfaces and the like, fabrication holes with smaller aperture and fabrication holes on thin-wall parts.)

1. A sealing plug for a fabrication hole is characterized in that: the sealing plug include ball and sealing bush, sealing bush be cylindrical structure, inside is equipped with the hole that the opening is located the top, the periphery is equipped with a plurality of sawtooth ring channels, sealing bush fills in the fabrication hole, the ball receives axial effort, the extrusion gets into sealing bush's hole, and then makes this sealing bush expand outward along radial, the saw point of sawtooth ring channel is impressed the inner wall of fabrication hole reaches sealedly the effect of fabrication hole.

2. A closing plug for a fabrication hole according to claim 1, wherein: the outer diameter of the ball is in interference fit with the inner hole of the sealing bush, and the outer diameter of the tooth tip of the sawtooth annular groove of the sealing bush is in transition fit with the technical hole.

3. A closing plug for a fabrication hole according to claim 1, wherein: the bottom end of the sealing bush is provided with a chamfer.

4. A closing plug for a fabrication hole according to claim 1, wherein: the tooth tip direction of the sawtooth annular groove points to the top end of the sealing bush.

5. A closing plug for a fabrication hole according to claim 1, wherein: the sealing bush is made of rigid material.

6. A closing plug for a fabrication hole according to claim 1, wherein: the inner hole of the sealing bush is a blind hole.

7. A closing plug for a fabrication hole according to claim 1, wherein: the sealing plug is completely buried in the fabrication hole after being installed.

8. A method of sealing a fabrication hole using the sealing plug of claim 1, wherein: the sealing method comprises the following steps:

1) selecting the specification of the sealing plug according to the size of the fabrication hole;

2) placing the sealing bush into the technical hole in a state that the bottom end faces the technical hole, and placing the round ball at the hole opening of the inner hole of the sealing bush;

3) knocking and pressing the round ball by using a knocking tool so as to knock the sealing plug into the technical hole;

4) the ball enters the sealing bush under the action of axial force, so that the sealing bush expands along the radial direction, and the tooth tips of the sawtooth annular grooves are pressed into the hole wall of the fabrication hole, thereby achieving the sealing function.

Technical Field

The invention relates to mechanical craft instruments, in particular to a sealing plug for a process hole and a sealing method, and belongs to the technical field of mechanical manufacturing.

Background

On mechanical equipment, in order to meet the requirements of manufacturing processes, such as facilitating the clamping of a part during machining, facilitating a tool to reach a machining part for machining, facilitating detection (such as a bevel hole and a cylindrical surface) to ensure machining accuracy or improve machining efficiency, a process hole needs to be formed in a relevant part of a part structure. These process holes generally need to be sealed after the machining process is finished, especially in the case of liquid or gas in the interior, so as to ensure that no leakage exists at the position of the process hole.

The conventional method for sealing the fabrication hole is to use a plug screw or a screw to screw and seal the fabrication hole according to strict torque regulations by means of threads and sealant. The existing process hole sealing operation procedure is complex, the installation state is unstable, and the following problems often occur in the installation process:

1) when the process hole is positioned at a special position such as an inclined plane, a cylindrical surface, a concave surface and the like, the conventional sealing device has the defect of poor contact, so that the conventional sealing device is loosened and leaked, and the expected sealing effect is difficult to achieve;

2) for some smaller fabrication holes (such as a fine hole with a diameter of 3 mm), the installation of the conventional sealing device is difficult to implement;

3) the conventional sealing device has strict requirements on tightening torque, so that the construction of a fabrication hole with a narrow position space is difficult;

4) the conventional sealing device generally needs to use a sealant or a sealing gasket, but is not suitable for a position with high temperature or corrosiveness;

5) the installation operation of the conventional sealing device is different from person to person, and the actual sealing effect is also influenced by the proficiency of installation personnel, so the requirement on the operation level of the installation personnel is higher;

6) when some conventional sealing devices protrude from the technical hole surface, the installation of the sealing devices can affect the installation of surrounding parts.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of easy looseness and poor sealing performance of the existing sealing device, and provide the sealing plug and the sealing method for the fabrication hole, so that the sealing performance of the fabrication hole is improved, the sealing plug and the sealing method are suitable for sealing and installing the fabrication hole at special positions such as an inclined plane, a cylindrical surface, a concave surface and the like, and the effects of simple structure, low cost and convenience in installation are achieved.

Based on the purpose, the technical scheme adopted by the invention is as follows:

the utility model provides a sealing plug for fabrication hole, its includes ball and sealing bush, sealing bush be cylindrical structure, inside is equipped with the hole that the opening is located the top, and the periphery is equipped with a plurality of sawtooth ring channels, sealing bush fills in the fabrication hole, the ball receives axial effort, and the extrusion gets into sealing bush's hole, and then makes this sealing bush radially outwards expand and open, the prong of sawtooth ring channel is impressed the inner wall of fabrication hole reaches and seals the effect of fabrication hole.

Furthermore, the outer diameter of the round ball is in interference fit with the inner hole of the sealing bush, and the outer diameter of the saw tip of the sawtooth annular groove of the sealing bush is in transition fit with the process hole.

Furthermore, the bottom end of the sealing bush is provided with a chamfer.

Further, the tooth tip direction of the sawtooth annular groove points to the top end of the sealing bush.

Further, the sealing bush is made of rigid material.

Further, the inner hole of the sealing bush is a blind hole.

Further, the sealing plug is completely buried in the fabrication hole after being installed.

The other technical scheme of the invention is as follows:

a sealing method of a fabrication hole realized by the sealing plug comprises the following steps:

1) selecting the specification of the sealing plug according to the size of the fabrication hole;

2) placing the sealing bush into the technical hole in a state that the bottom end faces the technical hole, and placing the round ball at the hole opening of the inner hole of the sealing bush;

3) knocking and pressing the round ball by using a knocking tool so as to knock the sealing plug into the technical hole;

4) the ball enters the sealing bush under the action of axial force, so that the sealing bush expands along the radial direction, and the tooth tips of the sawtooth annular grooves are pressed into the hole wall of the fabrication hole, thereby achieving the sealing function.

Compared with the traditional process hole sealing technology, the invention achieves the following effects:

1) the sealing mode of the invention is that the sealing plug is in rigid contact with the inner wall of the fabrication hole, and a plurality of circular sealing lines are formed by the annular sawteeth, thus the sealing effect is good.

2) The sealing plug is simple in structure and can be suitable for the process holes in special positions such as an inclined plane, a cylindrical surface and a concave surface.

3) The sealing plug has smaller volume, and is particularly suitable for process holes with smaller hole diameter and process holes on thin-wall parts.

4) The sealing plug has excellent corrosion resistance and high temperature resistance, and can be used for the fabrication holes at the positions under severe working conditions.

5) When in installation, the invention has little restriction on installation space and no requirement on installation torque, so the installation is simple and quick, no clear requirement on the technical level of installation personnel is required, and the installation of an automatic production line is facilitated.

6) Because the sealing plug can be completely buried in the fabrication hole after being installed, the sealing plug does not interfere with surrounding parts and does not have adverse effects on the installation of the surrounding parts.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of a seal cartridge.

FIG. 3 is a schematic view of a spherical ball.

Fig. 4 is one of the schematic views of the installation process of the present invention.

Fig. 5 is a second schematic view of the installation process of the present invention.

Fig. 6 is a state diagram of the use of the present invention.

Fig. 7 is a schematic diagram of the application of the present invention in a different location.

In the figure:

1-ball, 2-sealing bush, 21-sawtooth annular groove, 22-inner hole, 23-chamfer, 24-tooth point, 3-sealing plug, 4-fabrication hole, 5-knocking tool, 6-pipe valve, A-plane, B-inclined plane and concave surface, C-cylindrical surface, D-outer diameter, D-aperture and E-joint threaded hole.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and embodiments for a tool and a method for rapidly inspecting a connection bevel of a main bearing cap of a machine base.

Referring to fig. 1, the sealing plug for the fabrication hole of the present invention mainly comprises a spherical ball 1 and a sealing liner 2.

The sealing bush 2 is of a cylindrical structure and is made of a rigid material. Referring to fig. 2, the sealing bush has an inner hole 22 therein and a plurality of saw-tooth annular grooves 21 on the outer circumference. The inner hole 22 is a blind hole, and an opening is positioned at the top end of the sealing bush 2. The bottom end of the sealing bush 2 is provided with a chamfer 23 to facilitate plugging into the fabrication hole. The sealing bush 2 is used for being plugged into the fabrication hole, the size of the sealing bush 2 can be determined according to the size of the fabrication hole, the direction of the tooth tip 24 of the sawtooth annular groove 21 points to the top end of the sealing bush 2, and the outer diameter D of the tooth tip 24 of the sawtooth annular groove 21 of the sealing bush 2 is in transition fit with the inner wall of the fabrication hole.

Referring to fig. 3, the round ball 1 is used to be squeezed into the inner hole 22 of the sealing bush 2, and the outer diameter of the round ball 1 is manufactured according to the inner diameter d of the inner hole 22 of the sealing bush 2, so that the round ball 1 and the inner hole 22 of the sealing bush 2 achieve interference fit.

The method for sealing the process hole by using the sealing plug comprises the following specific installation and operation processes:

1) the specifications of the sealing plug are selected according to the size of the fabrication hole 4.

2) The sealing bush 2 is then placed in the process hole 4 with its bottom end facing the process hole 4. as shown in fig. 4, the chamfer 23 at the end of the sealing bush 2 serves just as a location and collar for placing the ball 1 at the mouth of the inner bore 22 of the sealing bush 2.

3) As shown in fig. 5, the round ball 1 is hit and pressed by a special knocking tool 5, and the sealing plug is knocked into the fabrication hole 4.

4) The sphere 1 enters the sealing bush 2 under the action of axial force, so that the sealing bush 2 expands along the radial direction, and the tooth tips 24 of the sawtooth annular grooves 21 on the excircle of the sphere are pressed into the hole wall of the fabrication hole 4 to be in rigid contact sealing engagement with the fabrication hole 4, so that a plurality of circular sealing lines are formed, and the purpose of sealing the fabrication hole 4 is achieved.

The application of the present invention is described below with reference to fig. 6. The pipe valve 6 is a part with hollow inside, thin wall and complex structure, and the installation of the fabrication hole 4 of the sealing plug 3 on the special positions of a plane A, a slope, a concave surface B, a cylindrical surface C and the like is intensively shown on the pipe valve 6. The advantages of the sealing plug 3 mounted on the plane a are less pronounced than those of conventional sealing devices, whereas the advantages of the mounting on the inclined and concave surfaces B, C are relatively pronounced. Existing seals, such as screw plugs with sealing gaskets, leak in this particular location due to poor planar contact; the sealing plug 3 solves this problem well because it seals in rigid contact with the process bore 4. The sealing plug 3 is also advantageous in that it does not expose the plane of the fabrication hole 4 and is completely buried in the fabrication hole 4, thereby avoiding interference with other installation parts. The plane A and the inclined plane and the concave surface B of the pipe valve 6 are provided with joint threaded holes E, and the adjacent parts of the joint threaded holes E are provided with fabrication holes 4 for installing the sealing plugs 3. A pipe joint is required to be installed on the joint threaded hole E, and if a traditional sealing device is installed at the position, the pipe joint interferes with the sealing device, so that the pipe joint cannot be installed; the sealing plug 3 does not expose the plane A, the inclined plane and the concave surface B, so that the interference with the pipe joint is avoided, and the effect of saving the installation space is achieved. Meanwhile, the pipe valve 6 is hollow inside and thin in wall thickness, and the sealing plug 3 on the inclined plane and the concave surface B is small in volume and shallow in installation depth, so that the pipe valve 6 cannot be drilled through from inside to outside when a sealing device is installed, and the pipe valve is also advantageous in the invention.

The scope of the invention is not limited to the above embodiments, and all equivalent variations and modifications made according to the disclosure of the present invention are within the scope of the present invention.