CN211661302U

CN211661302U - Back gas protection plug

Info

Publication number: CN211661302U
Application number: CN201922246096.0U
Authority: CN
Inventors: 张小君; 杨秋龙; 缪海卫
Original assignee: Omni Automation Technology Suzhou Co ltd
Current assignee: Omni Automation Technology Suzhou Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-10-13
Anticipated expiration: 2029-12-16

Abstract

The utility model discloses a be applied to a gas protection of back of body stifled piece that pipe fitting welding field was used, its structure includes support piece, rubber packing ring and tip adjustment piece, this support piece is provided with the connecting screw of tip location disc for the tip, connecting screw is located to the coaxial cover of rubber packing ring and tip adjustment piece, rubber packing ring realizes the sealed operation in both ends and forms sealed gas storage chamber in its middle part by tip location disc and tip adjustment piece respectively, connecting screw wears to establish along its axis and forms the air flue, and place the gas outlet of treating welded tube way in setting up the tip of tip location disc in for, another connecting screw's tip is the air inlet that is linked together with external equipment. This stifled piece utilizes the deformation realization of rubber packing ring to the inside sealed operation of pipe fitting, and hoisting device's application scope has guaranteed the model commonality, has satisfied the fast loading and unloading demand of stifled piece simultaneously, has promoted work efficiency, and its simple structure, and the realization of the maintenance operation of the follow-up structure of being convenient for has reduced the application cost.

Description

Back gas protection plug

Technical Field

The utility model relates to a back of body gas protection plug that pipe fitting welding field used.

Background

In general, during stainless steel welding, shielding gas enclosure is needed to avoid the influence of air oxidation on welding quality. When the stainless steel pipe fitting is welded, the outer ring on the front side of the stainless steel pipe fitting is welded by argon arc welding, and inert gas is introduced into the back side of the stainless steel pipe fitting to protect a welding seam molten pool, so that the harmful defect of welding seam metal tissue caused by oxidation of the back side of the welding seam is prevented, and the welding quality is ensured. The back gas protection of the tube is usually provided by end plugs, on the one hand for sealing the ports thereof and on the other hand for protection against the passage of inert gas. Like the welding that novel patent CN201621328291.8 discloses of using, its structure includes the soft plectane of two relative settings, and the circular slab is connected in the soft plectane outside, and two circular slabs pass through the steel pipe and connect, and a soft plectane upper portion sets up the intake pipe, sets up the pressure-fired air outlet valve on a soft plectane, sets up at a circular slab and takes out the rope. The utility model discloses an in the root welding bead welding process of non ferrous metal material butt weld, to the protection of root welding bead back, make its condition that root welding bead back oxidation can not appear. But the device's structural commonality is relatively poor, and sealed effect is difficult to ensure, easily leads to the waste of resource, has reduced the protective effect of protective gas to the welding back, is unfavorable for high quality welded realization, has increased application cost.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide an effectively promote stifled piece of gas protection of carrying on one's back of sealed protecting effect.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a back of body gas protection plug, includes support piece, rubber packing ring and end adjustment piece, support piece is the connecting screw that the tip was provided with the tip positioning disc for the tip, connecting screw and can follow screw rod axis direction and realize reciprocating motion are located to rubber packing ring and the coaxial cover of end adjustment piece, end positioning disc and end adjustment piece surround and form the rubber seal position that is used for spacing rubber packing ring, rubber packing ring realizes the sealed operation in both ends and forms sealed gas storage chamber in its middle part by tip positioning disc and end adjustment piece respectively, connecting screw wears to establish along its axis and forms the air flue to place the gas outlet of treating the welded tube spare in setting up the tip of tip positioning disc in, another connecting screw's tip is the air inlet that is linked together with external equipment, the external diameter of rubber packing ring equals or is greater than the external diameter of tip positioning disc.

The rubber gasket and the end adjusting piece of the device are sequentially sleeved on the connecting screw rod of the supporting piece, the end positioning disc at the other end of the connecting screw rod is matched with the end adjusting piece to form a rubber sealing position, the two ends of the rubber gasket are hermetically connected, and then the middle of the rubber gasket is surrounded to form a sealed air storage cavity. When the relative distance between the end adjusting piece and the end positioning disc is shortened, the end pressurizing operation is carried out on the sealed air storage cavity, and the outer annular surface of the corresponding sealing washer realizes the outer expansion deformation under the action of the sealed air storage cavity, so that the interference sealing operation on the pipe fitting is realized. The device directly utilizes the tip regulating part to adjust the endotheca and the external diameter of treating the inside rubber packing ring of welded tube spare and realize sealed and dismantle the operation, has promoted operation application efficiency, has realized the quick assembly disassembly demand to realize the conveying to gas through the air flue at connecting screw middle part, guaranteed the operation effect.

Further, the sealed air storage cavity is a communicated annular cavity groove which is coaxially arranged with the rubber gasket.

Further, the end adjustment member includes a rear end sealing circular plate facing the rubber packing, the rear end sealing circular plate having a diameter equal to or greater than an outer diameter of the rubber packing, and a butterfly knob.

Furthermore, the end positioning disc and the rear end sealing disc are oppositely provided with inner sleeve bosses which are sleeved at two ends of the rubber gasket.

Further, the end of the connecting screw rod is provided with a metal connector for connecting a conveying pipe fitting, and an adjustable displacement interval for installing the rubber gasket and the end adjusting piece is formed between the metal connector and the end positioning disc.

The utility model has the advantages that:

1. the plug realizes sealing operation on the interior of a pipe fitting by utilizing deformation of the rubber gasket, the application range of the device is widened, the model universality is ensured, the rapid loading and unloading requirements of the plug are met, the working efficiency is improved, the structure is simple, the maintenance operation of a subsequent structure is facilitated, and the application cost is reduced;

2. the arrangement of the annular sealing gas storage cavity improves the action pressure balance, provides guarantee for the circumferential deformation effect of the rubber gasket, is easy to realize axial matching with the inner diameter of the pipe fitting, and further improves the sealing fit;

3. the end part adjusting piece is structurally arranged, so that the positioning and sealing effects on the rubber gasket are improved, and meanwhile, the end part of the pipe fitting to be welded can be positioned by utilizing the outer diameter expansion of the rear end sealing circular plate, so that the excessive built-in operation of the plug is avoided, the installation, positioning and sealing quality of the plug is ensured, the operation effect is improved, the operation force application effect is improved by utilizing the butterfly knob, the realization of the rotating acting force is facilitated, and the operation efficiency is improved;

4. the metal connector is arranged to limit the relative positions of the sealing washer and the end adjusting piece on one hand, so that the loss of parts is avoided, the structural integrity is guaranteed, the universal connector adapting effect is easily realized, and the connectivity of the device is improved.

Drawings

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

fig. 2 is a sectional view of the connecting structure of the supporting member, the rubber washer and the end adjusting member of the present invention along the axis thereof;

FIG. 3 is a perspective view of the connection of the support member, the rubber washer and the end adjustment member of the present invention;

labeled as: 1. a support member; 11. connecting a screw rod; 12. an end positioning disc; 2. an airway; 21. an air inlet; 22. an air outlet; 3. a rubber gasket; 31. sealing the gas storage cavity; 4. an end adjustment member; 41. a rear end sealing circular plate; 411. a butterfly knob; 42. an inner sleeve boss; 5. a metal connector.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

The structure of the back gas protection block is shown in fig. 1 to 3 and consists of a support member 1, a gasket 3 and an end adjusting member 4. The air flue 2 for introducing argon gas is formed by penetrating along the axis of the support piece 1, the air outlet 22 of the air flue 2 faces the interior of the pipe fitting to be welded, the metal connector 5 is installed at the air inlet 21 of the air flue, and then the communication with external equipment is realized. Meanwhile, the metal connector 5 is easy to convert into a universal interface, so that the connection quality is improved, and the gas circulation effect of the device is ensured. The supporting member 1 is a connecting screw rod 11 with an end positioning disc 12 arranged at the end, and the end positioning disc 12 is coaxially and vertically arranged at the end of the connecting screw rod 11. The outer diameter of the end positioning disc 12 is smaller than the inner diameter of the pipe fitting to be welded, so that the built-in effect of penetration is ensured. At this time, the air passage 2 is formed by penetrating along the axis of the connecting screw 11, and the end of the end positioning disc 12 is arranged to be embedded in the air outlet 22 of the pipe to be welded, and the end of the other connecting screw 11 is an air inlet 21 communicated with external equipment. The rubber gasket 3 and the end adjusting piece 4 are coaxially sleeved on the connecting screw rod 11, and at the moment, the end positioning disc 12 and the end adjusting piece 4 surround and form a rubber sealing position for limiting the rubber gasket 3. The inner surface of the rubber sealing washer 3 is provided with an annular groove, and the end positioning disc 12 and the end adjusting part 4 are oppositely provided with inner sleeve bosses 42 which are sleeved at two ends of the rubber sealing washer 3. The inner sleeve boss 42 matches the inner diameter of the end of the rubber washer 3. To ensure the end adjustment effect, the end adjustment member 4 is composed of a rear end sealing circular plate 41 and a butterfly knob 411 which are coaxially arranged, and an inner sleeve boss 42 is arranged on the end surface of the rear end sealing circular plate 41 facing the rubber gasket 3. In the connection process, the inner sleeve sealing operation of the end face is respectively carried out on the two ends of the rubber gasket 3 by the end positioning disc 12 and the rear end sealing disc 41, the annular groove of the rubber gasket 3 is surrounded under the end face sealing action to form the sealed air storage cavity 31, and then the outer diameter of the rubber gasket 3 is deformed under the action of the internal pressure by utilizing the reciprocating movement of the end adjusting piece 4, so that the welding sealing operation is met

In order to ensure the connection application quality of the plugging piece, an adjustable displacement interval with a certain distance is formed between the metal connector 5 and the end positioning disc 12, so that the end adjusting piece 4 can realize displacement operation with a certain distance along the connecting screw rod 11, and further the stable realization of control operation is ensured. In the application process, since the outer diameter of the end positioning disk 12 is smaller than the inner diameter of the pipe to be welded, in order to ensure the sealing effect of the rubber gasket 3 on the pipe, the natural outer diameter of the rubber gasket 3 can be set to be equal to the outer diameter of the end positioning disk 12. The outer diameter of the rubber gasket 3 can expand to be larger than the end positioning disc 12 under the extrusion action of the rear end sealing circular plate 41, and interference fit with the pipe fitting is further realized, so that the sealing effect is ensured, and the dropping of the blocking piece under the action of the internal pressure of the pipe fitting is avoided. The axial width of the rubber gasket 3 can be set to three centimeters, five centimeters and the like so as to ensure the contact area of the plugging piece with the inner wall of the pipe fitting under the sealing and plugging action, thereby increasing the sealing effect and the relative acting force and improving the application stability. Because the rubber gasket 3 is the annular sealing air storage cavity 31 which is communicated in the circumferential direction, the pressure at each position can be ensured to be consistent under the action of the end adjusting piece 4, the connecting and sealing effect is improved, and the application quality is ensured. At this time, the diameter of the rear sealing circular plate 41 of the end adjusting member 4 can be set to be larger than the outer diameter of the rubber gasket 3, so that the pressurizing force on the rubber gasket 3 is increased, and the outer diameter of the rear sealing circular plate can be set to be larger than the inner diameter of the pipe to be welded, so that the installation and positioning operations of the plugging member are realized, and the fixing performance of the relative position of the plugging member and the pipe is ensured. In addition to the above-described setting method, the outer diameter of the rear end sealing circular plate 41 may be set to be smaller than or equal to the outer diameter of the rubber gasket 3. When using, the staff can place the tip positioning disc 12 and the rubber packing ring 3 of stifled piece and get into treat the end of welded tube spare in, then remove tip regulating part 4 towards tip positioning disc 12 to extrude rubber packing ring 3, then realize the inflation deformation under the effect of the outer inside atmospheric pressure of periphery of rubber packing ring 3, and then realize sealed operation to the pipe fitting. The plug can be connected with external air supply equipment through the metal connector 5 and can also be used as an air outlet. Meanwhile, the end part of the metal connector 5 can be detachably arranged on the sealing cover, so that the sealing protection of the port is realized. After the welding operation, the staff accessible makes the external diameter of seal ring 3 realize reducing of external diameter under the pressure effect and resume to natural chi footpath to the reverse rotation operation of tip regulating part 4, and then removes the interference seal to the pipe fitting, realizes the quick dismantlement of closure, promotes work efficiency.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The back gas protection blocking piece is characterized by comprising a supporting piece (1), a rubber gasket (3) and an end adjusting piece (4), wherein the supporting piece (1) is provided with a connecting screw rod (11) of an end positioning disc (12) for the end part, the rubber gasket (3) and the end adjusting piece (4) are coaxially sleeved on the connecting screw rod (11) and can realize reciprocating movement along the axis direction of the screw rod, the rubber gasket (3) is respectively realized by the end positioning disc (12) and the end adjusting piece (4) to realize sealing operation at two ends and form a sealed gas storage cavity (31) in the middle of the rubber gasket, the connecting screw rod (11) is penetrated and formed into a gas channel (2) along the axis of the connecting screw rod, the end part of the end positioning disc (12) is an air outlet (22) arranged in a pipeline to be welded in the end part, the end part of the other connecting screw rod (11) is an air, the outer diameter of the rubber gasket (3) is equal to or larger than that of the end positioning disc (12).

2. The back gas protection closure according to claim 1, wherein the sealing gas reservoir (31) is a communicating annular cavity groove arranged coaxially with the rubber gasket (3).

3. A back-gas protection closure according to claim 1, wherein the end adjustment member (4) comprises a rear sealing disc (41) facing the rubber gasket (3) and a butterfly knob (411), the rear sealing disc (41) having a diameter equal to or larger than the outer diameter of the rubber gasket (3).

4. The back gas protection closure according to claim 3, wherein the end positioning disk (12) and the rear end sealing disk (41) are oppositely provided with inner sleeve bosses (42) which are internally sleeved at two ends of the rubber gasket (3).

5. A back-gas protection closure according to claim 1, wherein the end of the connecting screw (11) is provided with a metal connector (5) for connecting a conveying pipe, and an adjustable displacement zone for mounting the rubber gasket (3) and the end adjusting member (4) is formed between the metal connector (5) and the end positioning disc (12).