CN209945629U

CN209945629U - Multipurpose shutoff mould

Info

Publication number: CN209945629U
Application number: CN201920842305.5U
Authority: CN
Inventors: 张春环; 赵红玉; 孙文达; 王保元; 朱维兴; 孙海斌; 孙海廷; 刘旭东; 刘文广; 孙凤敏
Original assignee: Hebei Cang Hai Nuclear Equipment Technology Co Ltd
Current assignee: Hebei Cang Hai Nuclear Equipment Technology Co Ltd
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-01-14
Anticipated expiration: 2029-06-05

Abstract

The utility model belongs to the accessory pressure test accessory manufacturing field, in particular to a multipurpose plugging die, which comprises a test piece connecting end, a U-shaped die body and a connecting mechanism, wherein the test piece connecting end is arranged at the lower end of the U-shaped die body, the connecting mechanism is arranged at the two ends of the U-shaped die body, the connecting mechanism comprises a cylindrical connecting threaded sleeve, a framework type sealing ring, a jacking nut and a connecting edge, the connecting edge is arranged at the end part of the U-shaped die body and is of a convex annular structure, a sealing gasket is arranged on the end surface of the connecting edge, the tubular connecting threaded sleeve is sleeved outside the connecting edge and forms a hook-pull limit by virtue of a necking structure and the connecting edge at the tail part of the tubular connecting threaded sleeve, the framework type sealing ring is sleeved outside the U-shaped die body and forms a sealing connection with the bottom of the tubular connecting threaded sleeve by virtue of the jacking nut, and the, the number of welding seams of the die is reduced, the strength and the sealing performance of the die are improved, and the repeated use of the die can be met.

Description

Multipurpose shutoff mould

Technical Field

The utility model belongs to accessory pressure test annex field of making, concretely relates to multipurpose shutoff mould for pressure test.

Background

At present, a pressure test is used as a test method or a detection technology for detecting the leakage of pipe fittings, the test method needs to use a plugging die, and a pressure test with test pressure being design pressure or slightly higher than operating pressure is used as a leakage test method for detecting whether the leakage of pipe fitting materials, welding seams and connecting piece sealing parts exists, so that the method is of great importance for the quality assurance of products.

In the plugging die in the prior art, because the number of the die body type assemblies is too many and the die body type assemblies can not be reused, the manufacturing cost is high, the efficiency is low, the quality is difficult to control, the die strength reduction phenomenon caused by too many die welding lines in the pressure test process of the die occurs occasionally, and the poor sealing effect of part of the die also brings inconvenience to the detection of pipe fittings. Therefore, if the die for the pressure test can be improved, a multipurpose die which is integrally formed, can be repeatedly used and has a good sealing effect is designed, the phenomenon of strength reduction caused by excessive die welding seams in the pressure test process is effectively avoided, and good economic benefits and application values can be brought.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that exists among the above-mentioned prior art, the utility model provides a multipurpose shutoff mould for pressure test can realize the whole shaping of mould and adopt threaded connection's form, reduce the welding seam quantity of mould body, avoid the pressure testing in-process effectively because of the too much emergence that arouses intensity reduction phenomenon of mould welding seam, can satisfy the used repeatedly of mould, thereby production efficiency has been improved greatly, simultaneously add sealing device in connecting the swivel nut bottom, the sealed effect of mould and security have been improved, make pipe fitting leak hunting experimental quality have had reliable technical assurance.

The utility model discloses a specific technical scheme be:

the utility model provides a multipurpose shutoff mould for pressure test, the mould include test piece link, U type mould body and coupling mechanism, the test piece link be located U type mould body lower extreme, coupling mechanism set up in the both ends of U type mould body, coupling mechanism include that the tube-shape is connected swivel nut, skeleton formula sealing washer, top tight nut and is connected along setting up the tip at U type mould body, be protruding ring structure along the connection, the connection be provided with sealed the pad on the terminal surface, the tube-shape connect swivel nut suit in the outside of connecting along and with the help of the throat structure of its afterbody with connect along forming collude draw spacing, skeleton formula sealing washer suit in the outside of U type mould body, the skeleton formula sealing washer form sealing connection with the bottom of barrel-shape connection swivel nut with the help of top tight nut.

The test piece connecting end is of a tubular structure and comprises a connecting pipe fixed with the U-shaped die body, the free end of the connecting pipe is provided with an annular boss, and the free end of the connecting pipe is provided with an external thread.

The framework type sealing ring comprises an annular metal framework and a rubber ring layer, wherein the vertical cross section of the annular metal framework is in an oblong shape, the rubber ring layer wraps the outer side of the annular metal framework, and the upper side of the rubber ring layer protrudes to form an annular sealing part with a semicircular cross section.

The jacking nut is sleeved on the outer side wall of the U-shaped die body through threads, and the jacking nut has the freedom degree of moving up and down along the axis direction of the end part of the U-shaped die body through external threads arranged on the U-shaped die body.

The barrel-shaped connection thread insert bottom and one side indent of U type mould body contact and the seal groove that encloses into the trough-shaped structure jointly with the lateral wall of U type mould body, the seal groove including set up in first inclined plane and the second inclined plane of barrel-shaped connection thread insert bottom, first inclined plane and second inclined plane form the chamfer structure, the inclination on second inclined plane be less than the inclination on first inclined plane, the skeleton formula sealing washer get into the seal groove with the help of the extrusion of tight nut in top and form detachable sealing connection.

The test piece connecting end is located at the middle position of the lower side of the U-shaped die body, and the test piece connecting end is connected with the U-shaped die body in a welding mode.

And the external thread at the connecting end of the test piece is matched with the threaded interface at the connecting part of the test piece.

The cylindrical connecting threaded sleeve at the connecting mechanism is reserved as a threaded interface matched with the test pressure gauge and is connected with the test pressure gauge in a threaded connection mode.

The utility model has the advantages that:

the utility model provides a multipurpose shutoff mould for pressure test can realize the whole shaping of mould and adopt threaded connection's form, the welding seam quantity of mould body has been reduced, reduce to 1 department by original many places, avoided the pressure testing in-process effectively because of the too much emergence that arouses intensity reduction phenomenon of mould welding seam, can satisfy the used repeatedly of mould, product quality is improved, can shorten used material size under the prerequisite that accords with technical requirement, thereby reduce cost, operation efficiency and production efficiency are improved.

The utility model discloses except connecting and being provided with sealed the pad along the terminal surface, add sealing device in connecting the swivel nut bottom simultaneously, improved sealed effect of mould and security for pipe fitting leak hunting test's quality has had reliable technical guarantee.

Drawings

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

FIG. 2 is an enlarged schematic view of the circled portion of FIG. 1;

in the attached drawing, 1, a U-shaped die body, 2, a connecting edge, 3, a cylindrical connecting threaded sleeve, 3-1, a sealing groove, 3-11, a first inclined surface, 3-12, a second inclined surface, 4, a test piece connecting end, 5, a framework type sealing ring, 5-1, an annular metal framework, 5-2, a rubber ring layer, 6, a sealing gasket, 7 and a jacking nut are arranged.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and specific embodiments:

embodiment 1, as shown in fig. 1, the multipurpose plugging die for the pressure test includes a test piece connecting end 4, a U-shaped die body 1 and a connecting mechanism, the test piece connecting end 4 is located at a middle position of a lower side of the U-shaped die body 1, the test piece connecting end 4 is connected with the U-shaped die body 1 in a welding manner, the test piece connecting end 4 is of a tubular structure and includes a connecting pipe fixed to the U-shaped die body 1, an annular protruding portion is arranged at a free end of the connecting pipe, an external thread is arranged at a free end of the connecting pipe, and the connecting mechanism is arranged at two ends of the U-shaped die body 1.

The connection mode is as follows: the utility model is provided with two connecting mechanisms which are respectively positioned at two port positions of the U-shaped die body 1, a cylindrical connecting screw sleeve 3 at the connecting mechanism is reserved as a screw interface matched with a test pressure gauge and is connected by adopting a screw connection mode, and a test piece is connected with a test piece connecting end 4 by screw threads;

the whole die is connected by threads, so that a foundation is laid for repeated use of the die, meanwhile, the die is processed in an integral forming mode, only the test piece connecting end 4 is connected with the U-shaped die body 1 in a welding mode, the number of welding seams of the die body is reduced, the number of the welding seams is reduced from multiple positions to 1 position, the phenomenon of strength reduction caused by excessive welding seams of the die in the pressure test process is effectively avoided, the repeated use of the die can be met, the product quality is improved, the size of the used material can be shortened on the premise of meeting the technical requirements, the cost is reduced, and the operation efficiency and the production efficiency are improved; in addition, the die is uniform in structure and attractive in appearance, the die body is in integral smooth transition in the pressure test process, so that the flowing of media is facilitated, more accurate data are displayed on a pressure gauge, the integral structure of the die is uniform, the flowing trend of the media is met in the pressure test process, and the safety is greatly improved.

In embodiment 2, as shown in fig. 1 and 2, the connecting mechanism includes a cylindrical connecting screw sleeve 3, a skeleton-type sealing ring 5, a tightening nut 7 and a connecting edge 2, the connecting edge 2 is arranged at the end part of the U-shaped die body 1 and is of a convex annular structure, the end surface of the connecting edge 2 is provided with a sealing gasket 6, the cylindrical connecting screw sleeve 3 is sleeved outside the connecting edge 2 and forms a hooking limit with the connecting edge 2 by virtue of a necking structure at the tail part of the connecting edge, the framework type sealing ring 5 is sleeved outside the U-shaped die body 1, the framework type sealing ring 5 is in sealing connection with the bottom of the cylindrical connecting screw sleeve 3 by means of a jacking nut 7, the jacking nut 7 is sleeved on the outer side wall of the U-shaped die body 1 through threads, and the jacking nut 7 has the freedom degree of moving up and down along the axial direction of the end part of the U-shaped die body 1 through external threads arranged on the U-shaped die body 1.

Further, the framework type seal ring 5 comprises an annular metal framework 5-1 and a rubber ring layer 5-2, the vertical section of the annular metal framework 5-1 is in an oblong shape, the rubber ring layer 5-2 is wrapped on the outer side of the annular metal framework 5-1, the upper side of the rubber ring layer 5-2 protrudes to form an annular seal part with a semicircular section, one side, contacting with the U-shaped die body 1, of the bottom of the tubular connecting screw sleeve 3 is concave inwards and forms a groove-shaped structure with the side wall of the U-shaped die body 1, the seal groove 3-1 comprises a first inclined surface 3-11 and a second inclined surface 3-12 which are arranged at the bottom of the tubular connecting screw sleeve 3, and the first inclined surface 3-11 and the second inclined surface 3-12 form a chamfer structure, the inclination of the second inclined plane 3-12 is smaller than that of the first inclined plane 3-11, and the framework type sealing ring 5 is extruded into the sealing groove 3-1 by means of the jacking nut 7 to form detachable sealing connection.

The utility model discloses except connecting and being provided with sealed 6 of filling up along 2 terminal surfaces, add skeleton type sealing washer 5 in connecting the swivel nut bottom simultaneously, top tight nut 7 has the degree of freedom that reciprocates along U type mould body 1's tip axis direction, through rotatory top tight nut 7, can form encapsulated situation in getting into seal groove 3-1 with skeleton type sealing washer 5 extrusion, through above double seal device, the sealed effect of mould has been improved, the security of mould has been promoted simultaneously for pipe fitting leak hunting test's quality has had reliable technical guarantee.

Claims

1. The utility model provides a multipurpose shutoff mould for pressure test, the mould include test piece link (4), U type mould body (1) and coupling mechanism, test piece link (4) be located U type mould body (1) lower extreme, coupling mechanism set up in the both ends of U type mould body (1), its characterized in that: the connecting mechanism comprises a cylindrical connecting threaded sleeve (3), a framework type sealing ring (5), a jacking nut (7) and a connecting edge (2), the connecting edge (2) is arranged at the end part of the U-shaped die body (1) and is of a convex annular structure, a sealing gasket (6) is arranged on the end face of the connecting edge (2), the cylindrical connecting threaded sleeve (3) is sleeved outside the connecting edge (2) and forms hooking and pulling limit with the connecting edge (2) by means of a necking structure at the tail part of the cylindrical connecting threaded sleeve, the framework type sealing ring (5) is sleeved outside the U-shaped die body (1), and the framework type sealing ring (5) forms sealing connection with the bottom of the cylindrical connecting threaded sleeve (3) by means of the jacking nut (7).

2. The multipurpose plugging die for the pressure test according to claim 1, wherein: the test piece connecting end (4) is of a tubular structure and comprises a connecting pipe fixed with the U-shaped die body (1), an annular protruding portion is arranged at the free end of the connecting pipe, and an external thread is arranged at the free end of the connecting pipe.

3. The multipurpose plugging die for the pressure test according to claim 1, wherein: the framework type sealing ring (5) comprises an annular metal framework (5-1) and a rubber ring layer (5-2), the vertical section of the annular metal framework (5-1) is in an oblong shape, the rubber ring layer (5-2) wraps the outer side of the annular metal framework (5-1), and the upper side of the rubber ring layer (5-2) protrudes to form an annular sealing part with a semicircular section.

4. The multipurpose plugging die for the pressure test according to claim 1, wherein: the jacking nut (7) is sleeved on the outer side wall of the U-shaped die body (1) through threads, and the jacking nut (7) has the freedom degree of moving up and down along the axis direction of the end part of the U-shaped die body (1) through external threads arranged on the U-shaped die body (1).

5. The multipurpose plugging die for the pressure test according to claim 1, wherein: one side of the bottom of the cylindrical connecting threaded sleeve (3) contacting with the U-shaped die body (1) is concave inwards and forms a sealing groove (3-1) with the side wall of the U-shaped die body (1) to form a groove-shaped structure, the sealing groove (3-1) comprises a first inclined surface (3-11) and a second inclined surface (3-12) which are arranged at the bottom of the cylindrical connecting threaded sleeve (3), the first inclined surface (3-11) and the second inclined surface (3-12) form a chamfer structure, the inclination of the second inclined surface (3-12) is smaller than that of the first inclined surface (3-11), and the framework type sealing ring (5) is extruded into the sealing groove (3-1) by means of a jacking nut (7) to form detachable sealing connection.

6. The multipurpose plugging die for the pressure test according to claim 1, wherein: the test piece connecting end (4) is located at the middle position of the lower side of the U-shaped die body (1), and the test piece connecting end (4) is connected with the U-shaped die body (1) in a welding mode.