CN214583883U

CN214583883U - Negative pressure cover for detecting weld leakage

Info

Publication number: CN214583883U
Application number: CN202120893714.5U
Authority: CN
Inventors: 李柯
Original assignee: Chengdu Hejie Environmental Protection Engineering Co ltd
Current assignee: Chengdu Hejie Environmental Protection Engineering Co ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-11-02
Anticipated expiration: 2031-04-26

Abstract

The utility model discloses a welding seam leak detection's negative pressure cover, the main part of L shape of placing for the level including the cross-section, the top of main part is equipped with the vacuum pump, the vacuum pump passes through base and main part fixed connection, the inlet end of vacuum pump with give vent to anger the end respectively fixedly connected with fourth connecting pipe and third connecting pipe, the main part bears the ring at one side fixedly connected with of high bottom surface, the negative pressure cover of top fixedly connected with capsule form of bearing ring. The utility model discloses a set up negative pressure cover and sucking disc, pass through the sucking disc when the test object and the sealed fixed back of negative pressure cover, open the pneumatic valve this moment, the vacuum pump is taken away the inside air of negative pressure cover through second air duct and second connecting pipe, lets form the vacuum between negative pressure cover and the test object, and soapy water on the test object after the certain time, under the condition that no bubble produced, then explain that the welding seam gas tightness is qualified on the test object, have the bubble to produce, then explain unqualifiedly.

Description

Negative pressure cover for detecting weld leakage

Technical Field

The utility model relates to a welding seam leak testing technical field especially relates to a welding seam leak testing's negative pressure cover.

Background

In the welding of some important original paper, have certain requirement to the welding seam between the welding original paper, the naked eye is difficult to detect, generally all needs to use electronic detection equipment, prevents to take place to reveal in the in-process of the loading of some gas is stored.

Through the retrieval, chinese patent publication is CN 211978894U's patent discloses a pipeline girth weld nondestructive test device, and it includes welding seam check out test set, still includes the support frame, it is connected with the sleeve pipe that is used for wearing to establish the pipeline to rotate on the support frame, welding seam check out test set sets up one side of support frame, just welding seam check out test set's sense terminal is towards the pipeline lateral wall, the intraductal circumference of sleeve sets up a plurality of clamping parts that are used for the centre gripping pipeline, gear one is established to sheathed tube outer pipe wall fixed cover, be fixed with rotating electrical machines on the support frame, rotating electrical machines's output is fixed with gear two with the axle center, just gear one with gear two-phase meshing.

The nondestructive testing device for the pipeline girth weld in the patent has the following defects: the device can only detect the appearance damage condition between welding seams, cannot detect the air tightness between the welding seams, and cannot meet the detection requirement on the welding seams.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a negative pressure cover for detecting the leakage of welding seams.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a welding seam leak testing's negative pressure cover, includes that the cross-section is the main part of the L shape of placing for the level, the top of main part is equipped with the vacuum pump, the vacuum pump passes through base and main part fixed connection, the inlet end of vacuum pump and the end of giving vent to anger fixedly connected with fourth connecting pipe and third connecting pipe respectively, the third connecting pipe is the three-way pipe, main part bottom surface fixedly connected with carrier ring, the top fixedly connected with capsule-shaped negative pressure cover of carrier ring, the bottom fixedly connected with coupling hose of carrier ring, one side of coupling hose is equipped with adjustment mechanism, coupling hose's bottom fixedly connected with sucking disc.

Furthermore, the cross sections of the bearing ring, the connecting hose and the sucker are all oval.

Furthermore, a second pipe orifice of the third connecting pipe is in threaded connection with an air valve, a first through hole is formed in the top end of the negative pressure cover, the negative pressure cover is fixedly connected with a second connecting pipe at the first through hole, and the second connecting pipe is connected with the air valve through a second air duct.

Furthermore, the second connecting pipe extends to the outside cover of the inside one end of negative pressure hood and is equipped with first filter screen.

Furthermore, a third pipe opening of the third connecting pipe is fixedly connected with a first connecting pipe, the other end of the first connecting pipe is in threaded connection with an electronic air valve, a connecting valve is fixedly connected with an opening at the top end of the sucker, and the electronic air valve is connected with the connecting valve through a first air duct.

Furthermore, the adjusting mechanism comprises a sliding plate fixedly connected with the connecting hose, the top end of the sliding plate is rotatably connected with a screw rod, a threaded through hole is formed in the high bottom surface of the main body, the screw rod extends to the top end through the threaded through hole of the main body, and the screw rod is in threaded connection with the main body.

Furthermore, a plurality of pulleys are fixedly connected to the bottom surface of the main body.

Furthermore, the other end of the fourth connecting pipe is sleeved with a second filter screen.

The utility model has the advantages that:

1. through setting up negative pressure cover and sucking disc, after the test object passes through sucking disc and negative pressure cover sealed fixed, open the pneumatic valve this moment, the vacuum pump takes away the inside air of negative pressure cover through second air duct and second connecting pipe, lets form the vacuum between negative pressure cover and the test object, soapy water on the test object after the certain time, under the condition that no bubble produced, then explain that the welding seam gas tightness is qualified on the test object, have the bubble to produce, then explain unqualifiedly.

2. Through setting up electron air valve and air valve, rotate the screw rod, the screw rod rotates in the screw through-hole department of main part, drives the sliding plate and slides in the main part, the sliding plate drives coupling hose and extends, let the bottom of sucking disc and test object tightly support each other, then start the vacuum pump, let the electron air valve empty through first air duct and coupling valve with the inside air suction of sucking disc, then the electronic control valve is closed, let between sucking disc and the test object sealed fixed.

3. Through having set up the second filter screen, the second filter screen can be when the vacuum pump admits air from the fourth connecting pipe, filters the effect to the gas of inhaling, avoids the dust in the air to enter into the inside of vacuum pump, reaches dustproof effect.

Drawings

FIG. 1 is a schematic view of an overall structure of a negative pressure cover for detecting weld leakage according to the present invention;

FIG. 2 is a front cross-sectional view of a negative pressure housing for weld leakage detection according to the present invention;

fig. 3 is a schematic structural diagram of another alternative of the negative pressure cover for detecting weld leakage according to the present invention.

In the figure: the vacuum cleaner comprises a main body 1, a base 2, a vacuum pump 3, a first air duct 4, a first connecting pipe 5, an air valve 6, a second air duct 7, a second connecting pipe 8, a connecting hose 9, a bearing ring 10, a negative pressure cover 11, a suction cup 12, a sliding plate 13, a pulley 14, a screw rod 15, a first filter screen 16, a connecting valve 17, a third connecting pipe 18, an electronic air valve 19, a fourth connecting pipe 20 and a second filter screen 21.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings of the specification of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. The embodiments described below and the features of the embodiments can be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by the ordinary skilled person without creative work belong to the scope of the present invention, and the mentioned examples are only used for explaining the present invention, not for limiting the scope of the present invention.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1-2, a negative pressure hood for detecting weld leakage, includes a main body 1 with a horizontally placed L-shaped cross section, the main body 1 includes a high bottom surface and a low bottom surface, a vacuum pump 3 is disposed on the top of the main body 1, the vacuum pump 3 is fixedly connected with the main body 1 through a base 2, an air inlet end and an air outlet end of the vacuum pump 3 are respectively fixedly connected with a fourth connecting pipe 20 and a third connecting pipe 18, the main body 1 is fixedly connected with a bearing ring 10 on one side of the high bottom surface, the top end of the bearing ring 10 is fixedly connected with a capsule-shaped negative pressure hood 11, the bottom end of the bearing ring 10 is fixedly connected with a connecting hose 9, one side of the connecting hose 9 is provided with an adjusting mechanism, and the bottom end of the connecting hose 9 is fixedly connected with a sucker 12.

Preferably, the cross-section of the carrying ring 10, the connecting hose 9 and the suction cup 12 is oval.

The third connecting pipe 18 is a three-way pipe, a second port of the third connecting pipe is in threaded connection with an air valve 6, a first through hole is formed in the top end of the negative pressure hood 11, a second connecting pipe 8 is fixedly connected to the first through hole, the other end of the second connecting pipe 8 is connected with the air valve 6 through a second air duct 7, and the air valve 6 can control conveying of air inside the negative pressure hood 11.

One pot head that second connecting pipe 8 extends to negative pressure hood 11 inside is equipped with first filter screen 16, and first filter screen 16 can filter the inside air of negative pressure hood 11.

The first connecting pipe 5 of third port fixedly connected with of third connecting pipe 18, the other end threaded connection of first connecting pipe 5 has electronic air valve 19, the top end opening part fixedly connected with connecting valve 17 of sucking disc 12, and electronic air valve 19 is connected through first air duct 4 with connecting valve 17, and is preferred, electronic air valve 19 can adopt ZCK type electronic air valve, and electronic air valve 19 can carry out the ration to the inside air of sucking disc 12 and adsorb, lets sucking disc 12 can adsorb the test object sealed fixedly, can strengthen the test accuracy effectively.

The adjusting mechanism comprises a sliding plate 13 fixedly connected with the connecting hose 9, a screw rod 15 is rotatably connected to the top end of the sliding plate 13, a threaded through hole is formed in the high bottom surface of the main body 1, the screw rod 15 extends to the top end through the threaded through hole of the main body 1, and the screw rod 15 is in threaded connection with the main body 1.

A plurality of pulleys 14 are fixedly connected to the lower bottom surface of the main body 1, and preferably, the pulleys 14 can be self-locking universal wheels.

When the device is used, soapy water is coated on the surface of a welding gap of a test object, the screw rod 15 is rotated, the screw rod 15 rotates at the threaded through hole of the main body 1 to drive the sliding plate 13 to slide on the main body 1, the sliding plate 13 drives the connecting hose 9 to extend, the bottom end of the suction cup 12 is tightly abutted against the surface of the test object, then the vacuum pump 3 is started, the electronic air valve 19 sucks air in the suction cup 12 through the first air duct 4 and the connecting valve 12, the suction cup 12 and the test object are sealed and fixed, and then the electronic control valve 19 is closed;

after the test object is sealed and fixed with the negative pressure cover 11 through the suction cup 12, the air valve 6 is opened at the moment, the vacuum pump 3 pumps air inside the negative pressure cover 11 away through the second air duct 7 and the second connecting pipe 8, so that vacuum is formed between the negative pressure cover 11 and the test object, soapy water on the test object is tested after a certain time, and if no bubble is generated, the air tightness of a welding line on the test object is qualified, and if the bubble is generated, the air tightness of the welding line on the test object is unqualified.

Referring to fig. 3, for the utility model discloses a another optional mode, in order to increase the practicality of device, another pot head of fourth connecting pipe 20 is equipped with second filter screen 21, and second filter screen 21 can filter inspiratory gas 3 when vacuum pump 3 admits air from fourth connecting pipe 20, avoids the dust in the air to enter into vacuum pump 3's inside, reaches a dirt-proof effect.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a welding seam leak testing's negative pressure cover, includes main part (1) of L shape that the cross-section was placed for the level, its characterized in that, the top of main part (1) is equipped with vacuum pump (3), vacuum pump (3) are through base (2) and main part (1) fixed connection, the inlet end of vacuum pump (3) with give vent to anger the end and be fixedly connected with fourth connecting pipe (20) and third connecting pipe (18) respectively, third connecting pipe (18) are the three-way pipe, main part (1) bottom surface fixedly connected with carrier ring (10), the top fixedly connected with capsule-shaped negative pressure cover (11) of carrier ring (10), the bottom fixedly connected with coupling hose (9) of carrier ring (10), one side of coupling hose (9) is equipped with adjustment mechanism, the bottom fixedly connected with sucking disc (12) of coupling hose (9).

2. The negative pressure hood for detecting the weld leakage according to claim 1, characterized in that the cross sections of the bearing ring (10), the connecting hose (9) and the suction cup (12) are all oval.

3. The negative pressure cover for detecting the weld leakage according to claim 1, wherein a second pipe orifice of the third connecting pipe (18) is in threaded connection with an air valve (6), a first through hole is formed in the top end of the negative pressure cover (11), a second connecting pipe (8) is fixedly connected to the negative pressure cover (11) at the first through hole, and the second connecting pipe (8) is connected with the air valve (6) through a second air duct (7).

4. The negative pressure hood for detecting the weld leakage according to claim 3, wherein the first filter screen (16) is sleeved outside the end of the second connecting pipe (8) extending to the inside of the negative pressure hood (11).

5. The negative pressure hood for detecting the weld leakage according to claim 1, wherein a first connecting pipe (5) is fixedly connected to a third pipe orifice of the third connecting pipe (18), an electronic air valve (19) is connected to the other end of the first connecting pipe (5) in a threaded manner, a connecting valve (17) is fixedly connected to an opening at the top end of the suction cup (12), and the electronic air valve (19) is connected with the connecting valve (17) through a first air guide pipe (4).

6. The negative pressure cover for detecting the weld leakage according to claim 1, wherein the adjusting mechanism comprises a sliding plate (13) fixedly connected with the connecting hose (9), a screw (15) is rotatably connected to the top end of the sliding plate (13), a threaded through hole is formed in the high bottom surface of the main body (1), the screw (15) extends to the top end through the threaded through hole of the main body (1), and the screw (15) is in threaded connection with the main body (1).

7. The negative pressure cover for detecting the weld leakage according to claim 1, characterized in that a plurality of pulleys (14) are fixedly connected to the bottom surface of the main body (1).

8. The negative pressure hood for detecting the weld leakage according to claim 1, wherein a second filter screen (21) is sleeved at the other end of the fourth connecting pipe (20).