CN212338320U

CN212338320U - Pipe orifice structure and four-way valve

Info

Publication number: CN212338320U
Application number: CN202020240911.2U
Authority: CN
Inventors: 王水庆; 张聪; 过浙帅; 梁镪
Original assignee: Shaoxing Xinrui Dajin Welding Equipment Co ltd
Current assignee: Shaoxing Xinrui Dajin Welding Equipment Co ltd
Priority date: 2020-03-02
Filing date: 2020-03-02
Publication date: 2021-01-12
Anticipated expiration: 2030-03-02

Abstract

The utility model discloses a mouth of pipe structure, including takeover, intubate and welding ring, the intubate peg graft in the takeover, the interface end flaring of takeover is used for placing welding ring. The utility model discloses use and weld the ring and carry out automatic brazing, only need use flame to carry out continuous heating to the welding position and make and weld the ring and melt and fill the intertube gap, save the operation of sending the welding wire to can realize that a plurality of solder joints weld simultaneously, thereby it is big to have solved because of mouth of pipe position dimensional error, when using to send a to braze, because positional deviation leads to the welding wire to send into the position inaccurate, at the bottom of the qualification rate and inefficiency, need carry out welded problem to a plurality of solder joints in proper order. The utility model also discloses a cross valve, include the valve body and locate E pipe, S pipe, C pipe and D pipe on the valve body, E pipe, S pipe, C pipe and D pipe all adopt the mouth of pipe structure.

Description

Pipe orifice structure and four-way valve

Technical Field

The utility model relates to a cross valve technical field, concretely relates to mouth of pipe structure and cross valve.

Background

The four-way valve is a control valve having four orifices (E, S, C, D) and is an indispensable component in a refrigeration apparatus. The four-way valve is a control valve with four oil ports, and the working principle of the four-way valve is that when a solenoid valve coil is in a power-off state, a pilot slide valve moves left under the drive of a right compression spring, high-pressure gas enters a right piston cavity after entering a capillary tube, on the other hand, gas in the left piston cavity is discharged, and due to the fact that pressure difference exists at two ends of a piston, the piston and a main slide valve move left, an exhaust pipe is communicated with an outdoor machine connecting pipe, the other two connecting pipes are communicated, and a refrigeration cycle is formed.

The brazing method commonly adopted by the four-way valve connecting pipe and the pipe group at present is as follows:

1. assembling a four-way valve and a corresponding connecting pipe;

2. flame heating is carried out on the interface part needing brazing;

3. after the required temperature is reached, welding wires are fed to the welding seam part, the welding wires are melted, and the welding seam is filled;

4. and brazing the next interface part.

The above brazing method has the following defects:

1. due to the manufacturing process problem, the position deviation of four tubes of the four-way valve 'ESCD' is large, so that welding wires can not be sent to accurate positions easily, and the quality of welding seams and the qualified rate of brazing are reduced;

2. four welding spots need to be brazed in sequence, and the efficiency is low.

Therefore, there is a need for improved four-way valve nipples and stack configurations that improve brazing quality and efficiency.

Patent specification with publication number CN 109954996A discloses a take-over structure, cross switching-over valve and air conditioner, belongs to air conditioner accessory field, and the take-over structure includes steel pipe and copper pipe, and in the front end of steel pipe inserted the rear end of copper pipe, the preceding terminal surface of copper pipe surpassed the preceding terminal surface of steel pipe, and it is fixed to realize through the welding between steel pipe and the copper pipe, adopt the fusion welding realization to fix between copper pipe rear end face and the steel pipe outer wall, realize fixing through brazing between preceding terminal surface of steel pipe and the copper pipe inner wall for brazed brazing filler metal locates before the steel pipe between terminal surface and the copper pipe inner wall. Because the front end and the middle part of the copper pipe are not changed, the welding between the steel pipe and the copper pipe does not influence the welding fixation between the third-party pipe fitting and the copper pipe, and the defect of difficult welding between the existing connecting pipe structure and the third-party pipe fitting can be effectively overcome.

The patent specification with the publication number of CN 208123665U discloses a pipe orifice structure, a silencer and a four-way valve, wherein, the pipe orifice structure comprises a connecting pipe, a lining and a welding ring, the welding ring is connected with the connecting pipe and the lining, the lining is inserted into one end of the connecting pipe and is contracted, and the welding ring is sleeved at the contracted position. The welding ring is accurately positioned at the reducing position of the bushing, the bushing is inserted in the connecting pipe, and the connecting pipe is welded with the bushing, so that the welding quality of the bushing and the connecting pipe is ensured. The pipe orifice structure can be applied to the connecting end of a silencer and a four-way valve, improves the compressive strength of a product on the premise of ensuring the welding quality, and plays a role in energy conservation and emission reduction.

SUMMERY OF THE UTILITY MODEL

The weak point that exists to the field, the utility model provides a mouth of pipe structure can use and weld the ring and carry out automatic brazing, only need use flame to carry out continuous heating to the welding position and make and weld the ring and melt and fill intertube gap, save the operation of sending the welding wire, and can realize that a plurality of solder joints can weld simultaneously, thereby it is big because of mouth of pipe position dimensional error to have solved, when using to send a wire to braze, because positional deviation leads to the welding wire to send into the position inaccurate, at the bottom of the qualification rate and the problem of inefficiency (need weld a plurality of solder joints in proper order).

A pipe orifice structure comprises a connecting pipe, an inserting pipe and a welding ring, wherein the inserting pipe is inserted into the connecting pipe, and the interface end of the connecting pipe is flared and used for placing the welding ring.

The welding ring is sleeved on the insertion pipe. When the connecting pipe is used, the corresponding connecting pipe and the corresponding inserting pipe are assembled, the welding ring is sleeved on the inserting pipe, and the welding ring is arranged on the flaring at the interface end of the connecting pipe. When a plurality of pipe orifice structures are arranged, a plurality of interface parts needing to be welded can be simultaneously subjected to flame heating, after the required temperature is reached, the welding rings are melted, welding seams are uniformly filled, and then other interface parts can be welded.

Preferably, the connecting pipe and the inserting pipe are both copper pipes.

Preferably, the unilateral clearance between the outer wall of the insertion pipe and the inner wall of the connecting pipe is 0.05-0.25 mm, and further preferably 0.1 mm.

Preferably, the angle of the flaring tapered surface is 45 to 90 °, and more preferably 60 °.

Preferably, the difference between the inner diameter of the large end and the inner diameter of the small end of the flaring is 1-3 mm.

Preferably, an annular limiting convex part is arranged in the connecting pipe and used for blocking and limiting the depth of the insertion pipe extending into the connecting pipe.

The utility model also provides a cross valve, include the valve body and locate E pipe, S pipe, C pipe and D pipe on the valve body, E pipe, S pipe, C pipe and D pipe all adopt the mouth of pipe structure.

The welding method of the four-way valve comprises the following steps:

1. assembling a four-way valve and a pipe set (comprising a corresponding connecting pipe and an inserting pipe), and sleeving a welding ring;

2. simultaneously, carrying out flame heating on a plurality of interface parts to be welded;

3. after reaching the required temperature, the welding ring is melted and the welding seam is uniformly filled;

4. and welding the next interface part.

Compared with the prior art, the utility model, main advantage includes:

1. the utility model discloses need not send the welding wire when mouth of pipe structure welding, only need flame to carry out the continuous heating to the welding seam position and fill the welding seam until the welding ring melts. The influence of certain position deviation of the E pipe, the S pipe, the C pipe and the D pipe of the four-way valve on welding is small, namely the fault tolerance rate of the position deviation of the pipe group is high when the four-way valve is welded.

2. Can cooperate reasonable nozzle design, braze to a plurality of solder joints simultaneously, it is efficient.

Drawings

FIG. 1 is a schematic diagram of a conventional four-way valve and a nozzle structure;

FIG. 2 is a schematic view of the structure of the four-way valve and the pipe orifice of the present invention;

in the figure: 1-a valve body; 2-pipe connection; 3, intubation; 4-welding a ring; 5-flaring.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The following examples are conducted under conditions not specified, usually according to conventional conditions, or according to conditions recommended by the manufacturer.

The conventional four-way valve and pipe orifice structure is shown in fig. 1, and comprises a valve body 1, and an E pipe, an S pipe, a C pipe and a D pipe which are arranged on the valve body 1. Wherein, E pipe, S pipe, C pipe and D pipe all adopt conventional grafting mouth of pipe structure, including takeover 2 and the intubate 3 of inserting in takeover 2. A contraction limiting part is arranged in the connecting pipe 2, and the insertion end of the insertion pipe 3 is abutted to the contraction limiting part. The interface part of the connecting pipe 2 is a straight pipe, when welding, the interface part needing to be brazed is subjected to flame heating, after the required temperature is reached, welding wires are fed to the welding seam part, the welding wires are melted, the welding seam is filled, and then the next interface part is brazed.

The four-way valve and the pipe orifice structure of the embodiment are shown in fig. 2, and also comprise a valve body 1, and an E pipe, an S pipe, a C pipe and a D pipe which are arranged on the valve body 1. Wherein, E pipe, S pipe, C pipe and D pipe all adopt the utility model discloses a mouth of pipe structure, establish welding ring 4 on intubate 3 including takeover 2, intubate 3 and cover, intubate 3 pegs graft in takeover 2, and the interface end of takeover 2 forms flaring 5, and welding ring 4 shelves on flaring 5. A contraction limiting part is arranged in the connecting pipe 2, and the insertion end of the insertion pipe 3 is abutted to the contraction limiting part. The connecting pipe 2 and the inserting pipe 3 are both copper pipes. The unilateral clearance between the outer wall of the insertion pipe 3 and the inner wall of the connecting pipe 2 is 0.05-0.25 mm, and the optimal selection is 0.1 mm. The conical surface angle of the flaring 5 is 45-90 degrees, and preferably 60 degrees. The difference between the inner diameter of the large end and the inner diameter of the small end of the flared opening 5 is 1 to 3 mm.

The welding method of the four-way valve of the embodiment is as follows:

1. a four-way valve and a pipe set (comprising a corresponding connecting pipe 2 and a corresponding inserting pipe 3) are assembled, and a welding ring 4 is sleeved;

2. the welding ring 4 is used for automatic brazing, and flame is used for continuously heating a plurality of interface parts to be welded;

3. after the required temperature is reached, the welding ring 4 is melted and uniformly fills the gap between the insertion tube 3 and the connecting tube 2, so that the operation of feeding welding wires is omitted, and a plurality of welding spots can be simultaneously welded, thereby solving the problems of inaccurate position feeding, low qualification rate and low efficiency (a plurality of welding spots need to be welded in sequence) caused by position deviation when the welding wires are used for brazing due to large size error of the position of a tube opening;

4. and welding the next interface part.

Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the above description of the present invention, and such equivalents also fall within the scope of the appended claims.

Claims

1. A pipe orifice structure comprises a connecting pipe, an inserting pipe and a welding ring, and is characterized in that the inserting pipe is inserted in the connecting pipe, and the interface end of the connecting pipe is flared and used for placing the welding ring;

the unilateral clearance between the outer wall of the insertion pipe and the inner wall of the connecting pipe is 0.05-0.25 mm.

2. The nozzle structure according to claim 1, wherein the connecting tube and the inserting tube are both copper tubes.

3. The nozzle structure of claim 1, wherein the flaring taper angle is 45-90 °.

4. The pipe orifice structure of claim 1 or 3, wherein the difference between the inner diameter of the large end and the inner diameter of the small end of the flared end is 1-3 mm.

5. The nozzle structure according to claim 1, wherein an annular limiting protrusion is provided in the adapter tube.

6. A four-way valve comprises a valve body, and an E pipe, an S pipe, a C pipe and a D pipe which are arranged on the valve body, and is characterized in that the E pipe, the S pipe, the C pipe and the D pipe all adopt the pipe orifice structures of any one of claims 1 to 5.