CN212398563U

CN212398563U - Welding gun joint

Info

Publication number: CN212398563U
Application number: CN202020288759.5U
Authority: CN
Inventors: 简锌炜
Original assignee: Guangzhou Ruihong Machinery Equipment Co ltd
Current assignee: Weixin Guangzhou Industrial Technology Co ltd
Priority date: 2020-03-10
Filing date: 2020-03-10
Publication date: 2021-01-26
Anticipated expiration: 2030-03-10

Abstract

The utility model discloses a welding gun joint, which comprises a valve body, a connecting pipe core body and a connecting cylinder body, wherein one end of the valve body is provided with a knurled nut for being in threaded connection with a welding gun; an air inlet cavity and a valve cavity which are communicated with each other are formed in the valve body, the air inlet cavity is positioned at one end far away from the knurled nut, and the valve cavity is positioned at one end close to the knurled nut; the connecting pipe core body and the connecting cylinder body are both of hollow structures with two communicated ends, the connecting pipe core body is in threaded sealing connection with the air inlet cavity, and the connecting cylinder body is in threaded sealing connection with the valve cavity; the valve cavity is internally provided with the self-closing valve core component, the welding gun can be connected with the welding gun connector only by screwing the knurled nut on the welding gun, and the self-closing valve core component can realize that gas for welding enters the welding gun when the knurled nut is screwed on the welding gun; when the knurled nut is loosened from the welding gun, the self-closing valve core assembly can be sealed in a self-closing mode, gas leakage caused when the welding gun connector is separated from the welding gun is prevented, and therefore gas leakage is prevented, and potential safety hazards are reduced.

Description

Welding gun joint

Technical Field

The utility model relates to a welder accessory technical field especially relates to a welder connects.

Background

Gas welding is widely used in industry because of its good welding performance, and a welding torch for gas welding is generally connected to a welding machine through a welding torch joint, whereas the conventional welding torch joint is composed of a hexagon nut and a copper spherical surface connecting valve core. Because the gas density is little, need to screw up hexagon nut with the hexagonal spanner when welder connects with welder just the condition that the leakage just appears, nevertheless appear leaking through many times of dismouting very normal phenomenon.

In addition, in the industries of ship repair and construction, steel structure and the like, due to large-area welding operation, operators can detach the welding gun every day to prevent loss, even for convenience in use, the operators start operation and use the welding gun by directly screwing a hexagonal nut connected with the welding gun to the welding gun, and the leakage problem is particularly serious; moreover, after welding operation is finished, self-closing cannot be realized when the welding gun joint is separated from the welding gun, leakage is caused, potential safety hazards exist, and serious damage and influence are caused to enterprises and families if accidents occur.

SUMMERY OF THE UTILITY MODEL

To prior art's not enough, the utility model aims to provide a welding gun connects to prevent that gas leakage from reducing the potential safety hazard, can reduce the waste of the energy again, improve work efficiency simultaneously effectively.

The purpose of the utility model is realized by adopting the following technical scheme:

a welding gun connector comprises a valve body, a connecting pipe core body, a connecting cylinder body and a self-closing valve core, wherein one end of the valve body is provided with a knurled nut for being in threaded connection with a welding gun;

an air inlet cavity and a valve cavity which are communicated with each other are formed in the valve body, the air inlet cavity is positioned at one end far away from the knurled nut, and the valve cavity is positioned at one end close to the knurled nut;

the connecting pipe core body and the connecting cylinder body are both of hollow structures with two communicated ends, the connecting pipe core body is in threaded sealing connection with the air inlet cavity, and the connecting cylinder body is in threaded sealing connection with the valve cavity;

one end of the self-closing valve core is connected with a first spring fixed in the valve cavity, and the other end of the self-closing valve core penetrates through the inner cavity of the connecting cylinder body and extends out of an extension section for connecting with a welding gun;

an exhaust cavity is formed in the self-closing valve core, one end of the self-closing valve core, which is used for connecting a welding gun, is communicated with the exhaust cavity, and one end of the self-closing valve core, which is used for connecting a first spring, is not communicated with the exhaust cavity;

the outer wall of the self-closing valve core is provided with a plurality of first through holes communicated with the exhaust cavity, and the outer wall of the self-closing valve core is also provided with a sealing element which is positioned at one end close to the first spring;

when the welding gun connector is connected with a welding gun, the knurled nut is screwed on the welding gun, the self-closing valve core can move towards the direction close to the connecting pipe core body under the action of the first spring, and the exhaust cavity is communicated with the valve cavity by virtue of the first through hole, so that gas for welding enters the welding gun from the gas inlet cavity, the valve cavity, the first through hole and the exhaust cavity in sequence;

when the welding gun connector is separated from the welding gun, the knurled nut is loosened from the welding gun, the self-closing valve core is reset under the action of the first spring, and the connecting cylinder body and the self-closing valve core can be sealed in a self-closing mode by virtue of the sealing element, so that gas leakage caused when the welding gun connector is separated from the welding gun is prevented.

Furthermore, a check assembly is arranged in the air inlet cavity and used for preventing air from entering the air inlet cavity from the air exhaust cavity, but the air entering the air exhaust cavity from the air inlet cavity is not influenced.

Furthermore, the check assembly comprises a valve seat, a check valve core and a check sealing ring, the valve seat is fixed in the air inlet cavity, the check valve core is installed on the valve seat, a plurality of second through holes are formed in the valve seat, the air inlet cavity is communicated with the valve cavity, the check valve core is sealed with the inner wall of the air inlet cavity through the check sealing ring, and air is prevented from entering the air inlet cavity from the air exhaust cavity through the valve cavity.

Furthermore, the check assembly further comprises a second spring, one end of the second spring is fixed on the valve seat, the other end of the second spring is fixed on the check valve core, and the check valve core can move towards the direction close to the valve cavity under the action of gas pressure.

Further, the takeover core includes installation department and connecting portion, connecting portion are used for connecting the gas pipeline, be provided with first external screw thread on the outer wall of installation department, be provided with first internal thread on the inner wall in chamber of admitting air, first internal thread with first external screw thread meshing is connected, realizes taking over the threaded connection of core and valve body.

Further, connecting portion with be provided with first shoulder location portion between the installation department, the cover is equipped with first sealing washer on the installation department, with the help of first shoulder location portion is right first sealing washer location, and, the installation department with can pass through during air intake cavity threaded connection first sealing washer seals it.

Furthermore, a second external thread is arranged on the outer wall of the connecting cylinder body, a second internal thread is arranged on the inner wall of the valve cavity, and the second internal thread is meshed with the second external thread to realize threaded connection between the connecting cylinder body and the valve body.

Further, the connection cylinder body comprises a threaded connection portion and a sealing portion, the second external thread is arranged on the threaded connection portion, a second shoulder positioning portion is arranged on the outer wall of the sealing portion, a second sealing ring is sleeved between the second external thread and the second shoulder positioning portion, and the second sealing ring is positioned by means of the second shoulder positioning portion, so that the connection cylinder body can be sealed by the second sealing ring when in threaded connection with the valve body.

Further, a third sealing ring is further arranged on the sealing portion and used for sealing when the knurled nut is in threaded connection with the welding gun.

Furthermore, a fourth sealing ring is further arranged on the extension section and used for sealing when the extension section is connected with a welding gun.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses only need to screw up on welder through the annular knurl nut, can realize welder and welder joint's connection, and when the annular knurl nut was screwed up on welder, the self-closing case can move to the direction of being close to the takeover core under the effect of first spring to make the exhaust chamber communicate with the valve pocket through first through-hole, realize that the gas that is used for the welding gets into welder from air inlet chamber, valve pocket, first through-hole, exhaust chamber in proper order; in addition, when the welding gun is tempered (or the gun nozzle is blocked), the non-return assembly in the welding gun joint can prevent gas from flowing back into the gas supply pipe to cause potential safety hazard; when the knurled nut is loosened from the welding gun, the self-closing valve core is reset under the action of the first spring, and under the action of the sealing element, the connecting cylinder body can be sealed with the self-closing valve core in a self-closing manner, so that gas leakage caused when the welding gun joint is separated from the welding gun is prevented.

Drawings

FIG. 1 is a schematic sectional view of the present invention;

fig. 2 is a schematic structural diagram of a self-closing valve element according to an embodiment of the present invention;

FIG. 3 is a schematic sectional view of a valve body according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a connecting cylinder according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a connecting tube core body in the embodiment of the present invention;

FIG. 6 is a schematic structural view of a check assembly according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a knurled nut according to an embodiment of the present invention.

In the figure: 1. a valve body; 10. an air inlet cavity; 100. a first internal thread; 11. a valve cavity; 110. a second internal thread; 2. knurling the nut; 3. a pipe core body is connected; 30. a connecting portion; 31. an installation part; 310. a first seal ring mounting groove; 3100. a first seal ring; 311. a first external thread; 32. a first shoulder locating portion; 4. connecting the cylinder body; 41. a threaded connection; 410. a second external thread; 42. a sealing part; 420. a second shoulder positioning portion; 421. a second seal ring mounting groove; 4210. a second seal ring; 422. a third seal ring mounting groove; 4220. a third seal ring; 5. a self-closing valve element; 50. an exhaust chamber; 51. a first through hole; 52. a sealing element; 53. a fourth seal ring; 6. a first spring; 7. a check assembly; 70. a valve seat; 700. a second through hole; 71. a check valve core; 72. a non-return sealing ring; 73. a second spring.

Detailed Description

In the following, the present invention is described with priority in conjunction with the accompanying drawings and the detailed description, and it should be noted that, in the premise of no conflict, the embodiments or technical features described below may be arbitrarily combined to form a new embodiment.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The implementation mode is as follows:

as shown in fig. 1-7, the utility model discloses a welding gun connects, this welding gun connects includes valve body 1, takes over core 3 and connecting barrel 4, the one end of valve body 1 is provided with knurled nut 2 for with welding gun threaded connection, welding gun connects and only need screws up on welder through knurled nut 2 promptly, can be in order to realize being connected of welder and welding gun joint, compare in prior art, need not to use tools such as spanner to screw up, simple high-efficient. Of course, an air inlet cavity 10 and a valve cavity 11 which are communicated with each other are formed in the valve body 1, the air inlet cavity 10 is positioned at one end far away from the knurled nut 2, and the valve cavity 11 is positioned at one end close to the knurled nut 2; the connecting pipe core body 3 and the connecting cylinder body 4 are both of hollow structures with two communicated ends, the connecting pipe core body 3 is in threaded sealing connection with the air inlet cavity 10, sealing when the connecting pipe core body 3 is connected with the valve body 1 is achieved, the connecting cylinder body 4 is in threaded sealing connection with the valve cavity 11, and sealing when the connecting cylinder body 4 is connected with the valve body 1 is achieved.

The welding gun connector further comprises a self-closing valve core 5, one end of the self-closing valve core 5 is connected with a first spring 6 fixed in a valve cavity 11, and the other end of the self-closing valve core 5 penetrates through an inner cavity of the connecting cylinder 4 and extends out of an extension section for being connected with a welding gun, namely, the extension section is used for being connected with a gas connector of the welding gun, as can be understood by a person skilled in the art. Of course, an exhaust cavity 50 is formed in the self-closing valve core 5, one end of the self-closing valve core 5, which is used for connecting a welding gun, is communicated with the exhaust cavity 50, that is, a port of an extension section is communicated with the exhaust cavity 50, and one end of the self-closing valve core 5, which is used for connecting the first spring 6, is not communicated with the exhaust cavity 50.

A plurality of first through holes 51 communicated with the exhaust cavity 50 are formed in the outer wall of the self-closing valve core 5, and a sealing element 52 is further arranged on the outer wall of the self-closing valve core 5, wherein the sealing element 52 is positioned at one end close to the first spring 6. As can be understood by those skilled in the art, when a welding gun is connected with a welding gun joint and is screwed on the welding gun through the knurled nut 2 on the welding gun joint, a gas receiving head of the welding gun is connected with an extension section of the self-closing valve core 5, at this time, the self-closing valve core 5 can move towards the direction close to the connecting pipe core body 3 under the action of the first spring 6, and by means of the first through hole 51, namely, the first through hole 51 on the outer wall of the self-closing valve core 5 is communicated with the valve cavity 11 of the valve body 1 at this time, the exhaust cavity 50 is communicated with the valve cavity 11, so that gas for welding enters the welding gun from the gas inlet cavity 10, the valve cavity 11, the first through hole 51 and the exhaust cavity; when the welding gun is separated from the welding gun joint, the knurled nut 2 is loosened from the welding gun, the self-closing valve core 5 is reset under the action of the first spring 6, namely the first through hole 51 on the self-closing valve core 5 is not communicated with the valve cavity 11 of the valve body 1, the sealing element 52 is used for sealing a gap between the connecting cylinder 4 and the valve body 1, and the sealing element 52 is preferably a sealing ring, so that the connecting cylinder 4 can be sealed with the self-closing valve core 5 in a self-closing manner, and gas leakage caused by separation of the welding gun joint and the welding gun is prevented.

On the basis of the structure, the check assembly 7 is arranged in the air inlet cavity 10 and used for preventing the gas from entering the air inlet cavity 10 from the air exhaust cavity 50, but the gas entering the air exhaust cavity 50 from the air inlet cavity 10 is not influenced. Specifically, the check assembly 7 includes a valve seat 70, a check valve element 71 and a check sealing ring 72, the valve seat 70 is fixed in the air inlet chamber 10, the check valve element 71 is mounted on the valve seat 70, and a plurality of second through holes 700 are formed in the valve seat 70, so that the air inlet chamber 10 is communicated with the valve chamber 11, and thus, when the welding gun connector is connected with a welding gun, gas is not influenced to enter the exhaust chamber 50 from the air inlet chamber 10. Of course, the check valve spool 71 is normally open when the weld gun connection is connected to the weld gun.

The check valve core 71 is sealed with the inner wall of the inlet chamber 10 by the check sealing ring 72, i.e. when the welding gun joint is separated from the welding gun, the check sealing ring 72 prevents gas from entering the inlet chamber 10 from the exhaust chamber 50 through the valve chamber 11. That is, the utility model discloses an foretell self-closing valve core 5 with non return subassembly 7, when welder connects and welder separates, play duplicate protection's effect, prevent that the situation of tempering from appearing from taking place, reduced the potential safety hazard.

Further, the check assembly 7 further includes a second spring 73, one end of the second spring 73 is fixed on the valve seat 70, and the other end of the second spring 73 is fixed on the check valve core 71, and under the action of the gas pressure, the check valve core 71 can move toward the direction close to the valve chamber 11. That is, as will be understood by those skilled in the art, when the pressure of the gas introduced from the nipple core body 3 is higher, that is, the pressure of the gas entering the gas inlet chamber 10 is higher, the check valve core 71 moves toward the valve chamber 11 under the force of the second spring 73, so that the gas flow entering the gas outlet chamber 50 is higher, and the welding performance of the welding gun is stronger.

As the utility model discloses a preferred, takeover core 3 includes connecting portion 30 and installation department 31, connecting portion 30 is used for connecting the pipeline of confession gas, be provided with first external screw thread 311 on the outer wall of installation department 31, be provided with first internal thread 100 on the inner wall in chamber 10 admits air, first internal thread 100 with first external screw thread 311 meshes the connection, realizes taking over core 3 and valve body 1's threaded connection. Further, a first shoulder positioning portion 32 is arranged between the connecting portion 30 and the mounting portion 31, a first sealing ring 3100 is sleeved on the mounting portion 31, the first sealing ring 3100 is positioned by means of the first shoulder positioning portion 32, and the mounting portion 31 and the intake chamber 10 can be sealed by the first sealing ring 3100 when in threaded connection. That is, as can be understood by those skilled in the art, a first packing installation groove 310 is provided in the vicinity of the first shoulder positioning portion 32, as shown in fig. 5, that is, the first packing installation groove 310 is provided in the mounting portion 31, and the first packing installation groove 310 is located between the first shoulder positioning portion 32 and the first external thread 311, and the first packing is installed in the first packing installation groove 310, and can be sealed by the first packing when the mounting portion 31 is threadedly coupled with the intake chamber 10.

As the utility model discloses a preferred, be provided with second external screw thread 410 on the outer wall of connecting barrel 4, be provided with second internal thread 110 on the inner wall of valve pocket 11, second internal thread 110 with second external screw thread 410 meshes the connection, realizes connecting barrel 4 and valve body 1's threaded connection. Further, the connection cylinder 4 includes a threaded connection portion 41 and a sealing portion 42, the second external thread 410 is disposed on the threaded connection portion 41, a second shoulder positioning portion 420 is disposed on an outer wall of the sealing portion 42, and a second sealing ring 4210 is sleeved between the second external thread 410 and the second shoulder positioning portion 420, as shown in fig. 4, that is, a second sealing ring installation groove 421 is disposed near the second shoulder positioning portion 420, and the second sealing ring installation groove 421 is located between the second external thread 410 and the second shoulder positioning portion 420, and the second sealing ring 4210 is positioned by the second shoulder positioning portion 420, so that the connection cylinder 4 and the valve body 1 can be sealed by the second sealing ring 4210 when being in threaded connection. Furthermore, a third sealing ring 4220 is disposed on the sealing portion 42 for sealing when the knurled nut 2 is screwed with a welding gun. Of course, the sealing portion 42 is further provided with a third sealing ring installation groove 422 for installing the third sealing ring 4220.

Preferably, the extension section is further provided with a fourth sealing ring 53 for sealing when the extension section is connected with the welding gun. That is, as can be understood by those skilled in the art, the extension of the self-closing valve core 5 is provided with a fourth sealing ring 53, and when the welding gun is connected with the welding gun joint and the extension is connected with the welding gun gas joint, the extension can be sealed with the welding gun gas joint through the fourth sealing ring 53.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. A welding gun joint characterized by: the automatic welding valve comprises a valve body, a connecting pipe core body, a connecting cylinder body and a self-closing valve core, wherein one end of the valve body is provided with a knurled nut for being in threaded connection with a welding gun;

when the welding gun connector is connected with a welding gun, the knurled nut is screwed on the welding gun, the self-closing valve core can move towards the direction close to the connecting pipe core body under the action of the first spring, and the exhaust cavity can be communicated with the valve cavity by virtue of the first through hole, so that gas for welding can enter the welding gun from the gas inlet cavity, the valve cavity, the first through hole and the exhaust cavity in sequence;

2. A weld gun joint according to claim 1, wherein: the air inlet cavity is internally provided with a check assembly for preventing gas from entering the air inlet cavity from the exhaust cavity, but the gas entering the exhaust cavity from the air inlet cavity is not influenced.

3. A weld gun joint according to claim 2, wherein: the check assembly comprises a valve seat, a check valve core and a check sealing ring, the valve seat is fixed in the air inlet cavity, the check valve core is installed on the valve seat, a plurality of second through holes are formed in the valve seat, the air inlet cavity is communicated with the valve cavity, the check valve core is sealed with the inner wall of the air inlet cavity through the check sealing ring, and air is prevented from entering the air inlet cavity from the exhaust cavity through the valve cavity.

4. A weld gun joint according to claim 3, wherein: the check assembly further comprises a second spring, one end of the second spring is fixed on the valve seat, the other end of the second spring is fixed on the check valve core, and the check valve core can move towards the direction close to the valve cavity under the action of gas pressure.

5. A weld gun joint according to claim 1, wherein: the connecting pipe core comprises an installation part and a connecting part, the connecting part is used for connecting a gas pipeline, a first external thread is arranged on the outer wall of the installation part, a first internal thread is arranged on the inner wall of the gas inlet cavity, the first internal thread is meshed with the first external thread to be connected, and threaded connection of the connecting pipe core and the valve body is achieved.

6. The weld gun joint according to claim 5, wherein: connecting portion with be provided with first shoulder location portion between the installation department, the cover is equipped with first sealing washer on the installation department, with the help of first shoulder location portion is right first sealing washer location, and, the installation department with can pass through during admit air chamber threaded connection first sealing washer seals it.

7. A weld gun joint according to claim 1, wherein: the outer wall of the connecting cylinder body is provided with second external threads, the inner wall of the valve cavity is provided with second internal threads, and the second internal threads are meshed with the second external threads to realize threaded connection between the connecting cylinder body and the valve body.

8. A weld gun joint according to claim 7, wherein: the connecting cylinder body comprises a threaded connecting portion and a sealing portion, the second external thread is arranged on the threaded connecting portion, a second shoulder positioning portion is arranged on the outer wall of the sealing portion, a second sealing ring is sleeved between the second external thread and the second shoulder positioning portion, and the second sealing ring is positioned by the aid of the second shoulder positioning portion, so that the connecting cylinder body can be connected with the valve body in a threaded mode through the second sealing ring to seal the connecting cylinder body.

9. A weld gun joint according to claim 8, wherein: and a third sealing ring is further arranged on the sealing part and used for sealing when the knurled nut is in threaded connection with the welding gun.

10. A weld gun joint according to claim 1, wherein: and a fourth sealing ring is further arranged on the extension section and used for sealing when the extension section is connected with a welding gun.