阅读说明：本技术 能够对四通阀与d接管进行预固定的工具及装置 (Tool and device capable of pre-fixing four-way valve and D connecting pipe ) 是由 刘韬 刘启斌 侯洋洋 于 2019-09-18 设计创作，主要内容包括：本发明提出了一种能够对四通阀与D接管进行预固定的工具,包括胀管头、胀管针和定位座。使用该工具可效应解决D接管与阀体间配合松动,存在歪斜、插入深度不一、D接管与阀体配合间隙不一等问题。通过使用胀管头对D接管管口内壁接触配合,可以达到控制插管深度的目的,且稳定性高；D接管经过胀管后,D接管与主阀体可直接靠过盈配合固定住,垂直度也可得到稳定控制；另外也可在一定程度上保证D接管与阀体的配合间隙均匀,有利于毛细作用,进而可保证焊料有良好的流动性,从而保证焊接质量稳定性。本发明提供的能够对四通阀与D接管进行预固定的装置,可以实现从放料、定位、胀管、下料全过程自动化完成,提高生产效率。(The invention provides a tool capable of pre-fixing a four-way valve and a D-shaped connecting pipe. The tool can be used for effectively solving the problems that the D connecting pipe and the valve body are not matched and loosened, the D connecting pipe is skewed, the insertion depth is different, the fit clearance between the D connecting pipe and the valve body is different and the like. The purpose of controlling the depth of the cannula can be achieved by using the contact fit of the tube expanding head on the inner wall of the opening of the D-shaped connecting tube, and the stability is high; after the D connecting pipe passes through the pipe expanding, the D connecting pipe and the main valve body can be directly fixed in an interference fit mode, and the verticality can be stably controlled; in addition, the uniform fit clearance between the D connecting pipe and the valve body can be ensured to a certain extent, the capillary action is facilitated, and the good fluidity of the welding flux can be ensured, so that the stability of the welding quality is ensured. The device capable of pre-fixing the four-way valve and the D connecting pipe can automatically complete the whole processes of discharging, positioning, pipe expanding and discharging, and improves the production efficiency.)

1. The utility model provides a can take over with D and carry out instrument of pre-fixing to cross valve which characterized in that includes:

the pipe expanding head is internally provided with a cavity and is used for simultaneously expanding the inner diameter and the outer diameter of the D connecting pipe;

a tube expanding needle which can move along the axial direction of the tube expanding head in the cavity to push the tube expanding head to expand outwards;

and the positioning seat is used for accommodating and positioning the valve body of the four-way valve and providing a channel which vertically extends to the valve body for the tube expansion head.

2. The tool capable of pre-fixing the four-way valve and the D-connection pipe according to claim 1, wherein the tube expansion head comprises a main body part and a tube expansion part which are connected with each other; a cavity penetrating through the main body part and the expansion tube part is formed in the expansion tube head, and the cavity in the expansion tube part is a conical cavity; the main part with expand tub portion and all set up along a plurality of grooves of axial extension.

3. The tool capable of pre-fixing the four-way valve and the D connecting pipe according to claim 2, wherein the plurality of grooves on the main body part are arranged at equal intervals along the circumferential direction of the main body part; the multiple grooves in the expansion pipe part are arranged at equal intervals along the circumferential direction of the expansion pipe part.

4. The tool capable of pre-fixing the four-way valve and the D-shaped connecting pipe according to claim 2, wherein the tube expansion part comprises a connecting part and a tube expansion end which are connected, the connecting part is in a truncated cone-shaped structure, and the bottom surface of the connecting part is connected with the main body part; the top surface of the connecting part is connected with the expansion pipe end.

5. The tool capable of pre-fixing a four-way valve and a D-connection pipe according to claim 4, wherein the expansion pipe end is of a cylindrical structure, or

The expansion pipe end is of a cylindrical structure, and the top of the expansion pipe end is provided with an annular bulge.

6. The tool capable of pre-fixing a four-way valve and a D-connection according to claim 4, wherein the expansion tube end is divided into a plurality of portions by the plurality of grooves, the plurality of portions are all in a tapered structure, and the top ends of the portions are all located in the same cylindrical surface.

7. The tool capable of pre-fixing the four-way valve and the D-connection pipe according to claim 6, wherein the end surfaces of the plurality of parts are inclined diamond end surfaces, and the diamond end surfaces are inclined from the axial center of the pipe expanding head to the periphery along the radial direction of the pipe expanding head.

8. The tool capable of pre-fixing the four-way valve and the D-shaped connecting pipe according to any one of claims 1 to 7, wherein the pipe expanding needle comprises a base, a main body and a thimble which are connected in sequence, and the pipe expanding needle can push the pipe expanding head to expand outwards by means of the thimble.

9. The tool capable of pre-fixing the four-way valve and the D connecting pipe according to any one of claims 1 to 7, wherein a first groove and a second groove are arranged on the positioning seat, the first groove is used for accommodating and positioning the valve body, and the second groove is the passage and is communicated with the first groove.

10. The tool capable of pre-fixing the four-way valve and the D-connection pipe according to claim 9, wherein the positioning seat is further provided with a mounting hole.

11. A device capable of pre-fixing a four-way valve and a D-connection, comprising a tool according to any one of claims 1 to 10 and a drive mechanism for driving the inflation needle to move within the cavity.

Technical Field

The invention relates to a tool and a device capable of pre-fixing a four-way valve and a D connecting pipe, and belongs to the technical field of air conditioning equipment.

Background

In the technical field of current air conditioning equipment, a four-way valve mainly adopts two modes of integrated welding and split welding, wherein the integrated welding mode is that before welding, a D connecting pipe and a valve body are required to be pre-fixed, the operation is mainly realized by manpower at present, a welding tool is installed after the D connecting pipe is inserted into the valve body, and then the insertion depth is required to be controlled by a positioning block on the welding tool. However, in this mode, the D connection pipe and the valve body are in a loose fit state, so that the problems of skew, inconsistent insertion depth, non-uniform fit clearance between the D connection pipe and the valve body exist, and the stability of welding quality is not facilitated. In addition, when the material is taken, the worker needs to be handed to hold the material to grasp the material, certain requirements are required on the operating proficiency of the worker, otherwise, the D connecting pipe is easy to fall off from the valve body, the operation steps are multiple, and the production efficiency is low.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a tool capable of pre-fixing a four-way valve and a D connecting pipe, and the tool can effectively solve the problems that before the four-way valve is integrally welded, the D connecting pipe and a valve body are not matched and loosened, the skew exists, the insertion depth is different, the fit clearance between the D connecting pipe and the valve body is different, and the like.

The invention provides a tool capable of pre-fixing a four-way valve and a D connecting pipe, which comprises:

the pipe expanding head is internally provided with a cavity and is used for simultaneously expanding the inner diameter and the outer diameter of the D connecting pipe;

a tube expanding needle which can move along the axial direction of the tube expanding head in the cavity to push the tube expanding head to expand outwards;

and the positioning seat is used for accommodating and positioning the valve body of the four-way valve and providing a channel which vertically extends to the valve body for the tube expansion head.

Preferably, the tube expansion head comprises a main body part and an expansion part which are connected with each other; a cavity penetrating through the main body part and the expansion tube part is formed in the expansion tube head, and the cavity in the expansion tube part is a conical cavity; the main part with expand tub portion and all set up along a plurality of grooves of axial extension.

Preferably, the plurality of grooves on the main body part are arranged at equal intervals along the circumferential direction of the main body part; the multiple grooves in the expansion pipe part are arranged at equal intervals along the circumferential direction of the expansion pipe part.

Preferably, the tube expansion part comprises a connecting part and a tube expansion end which are connected, the connecting part is in a circular truncated cone-shaped structure, and the bottom surface of the connecting part is connected with the main body part; the top surface of the connecting part is connected with the expansion pipe end.

Preferably, the tube expansion end is of cylindrical configuration, or

The expansion pipe end is of a cylindrical structure, and the top of the expansion pipe end is provided with an annular bulge.

Preferably, the tube expansion end is divided into a plurality of portions by the plurality of grooves, the plurality of portions are all in a conical structure, and the top ends of the portions are all located in the same cylindrical surface.

Preferably, the end faces of the plurality of parts are inclined rhombic end faces, and the rhombic end faces are inclined towards the periphery from the axis of the tube expansion head along the radial direction of the tube expansion head.

Preferably, expand the pipe needle including base, main part and the thimble that connects gradually, expand the pipe needle and can promote with the help of its thimble expand the tube head outwards expansion.

Preferably, a first groove and a second groove are arranged on the positioning seat, the first groove is used for accommodating and positioning the valve body, and the second groove is the channel and is communicated with the first groove.

Preferably, the positioning seat is further provided with a mounting hole.

The invention also provides a device capable of pre-fixing the four-way valve and the D connecting pipe, which comprises the tool and a driving mechanism for driving the tube expanding needle to move in the cavity.

Compared with the existing scheme of manually pre-fixing the D connecting pipe and the valve body, the tool for pre-fixing the four-way valve and the D connecting pipe can pre-fix the four-way pipe and the D connecting pipe before welding, and can effectively solve the problems of deflection, different insertion depths and different fit gaps of the D connecting pipe and the valve body due to loose fit between the D connecting pipe and the valve body in the prior art. The purpose of controlling the depth of the cannula can be achieved by using the contact fit of the tube expanding head on the inner wall of the opening of the D-shaped connecting tube, and the stability is high; after the D connecting pipe passes through the pipe expanding, the D connecting pipe and the main valve body can be directly fixed in an interference fit mode, and the verticality can be stably controlled; in addition, the uniform fit clearance between the D connecting pipe and the valve body can be ensured to a certain extent, the capillary action is facilitated, and the good fluidity of the welding flux can be ensured, so that the stability of the welding quality is ensured. The device capable of pre-fixing the four-way valve and the D connecting pipe can automatically complete the whole processes of discharging, positioning, pipe expanding and discharging, and improves the production efficiency.

The features mentioned above can be combined in various suitable ways or replaced by equivalent features as long as the object of the invention is achieved.

Drawings

The invention will be described in more detail hereinafter on the basis of non-limiting examples only and with reference to the accompanying drawings. Wherein:

fig. 1 is an exploded schematic view of an automatic pipe expansion device for fixing a D-connection pipe of a four-way valve according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a plum blossom-shaped tube expansion head provided in an embodiment of the present invention;

FIG. 3 is an enlarged schematic view at C of FIG. 2;

FIG. 4 is a cross-sectional view of a quincunx tube expander provided in an embodiment of the present invention;

FIG. 5 is a schematic structural view of an inflation needle provided in an embodiment of the present invention;

fig. 6 is a schematic structural diagram of the positioning seat according to an embodiment of the present invention;

fig. 7 is an assembly view of an automatic pipe expanding device for fixing a D-connection pipe of a four-way valve according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view of a valve body of the four-way valve;

FIG. 9 is a cross-sectional view of the tube expansion portion;

FIG. 10 is a perspective view of a cylindrical head-shaped inflation head provided in one embodiment of the present invention;

FIG. 11 is a cross-sectional view of a diamond-shaped tube expander provided in an embodiment of the present invention;

fig. 12 is a perspective view of a torus nose expansion head provided in an embodiment of the present invention.

Description of reference numerals:

1. d, taking over a pipe; 2. a valve body; 3. positioning seats; 4. expanding the pipe head; 5. a tube expanding needle; 11. a gap; 21. d, connecting the pipe hole; 22. the valve body is connected with the pipe hole; 31. a first groove; 32. a second groove; 33. mounting holes; 41. a base part; 42. a main body portion; 43. expanding the tube; 44. a groove; 45. a cavity; 51. a base; 52. a main body; 53. a thimble; 431. a connecting portion; 432. and expanding the pipe end.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and more complete, the following technical solutions of the present invention will be described in detail, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the specific embodiments of the present invention belong to the protection scope of the present invention.

As shown in fig. 1, the tool capable of pre-fixing the four-way valve and the D connection pipe provided in this embodiment includes: a tube expanding head 4, a tube expanding needle 5 and a positioning seat 3.

The expansion head 4 is used to simultaneously expand the inner diameter and the outer diameter of the D-joint pipe 1. As shown in fig. 2 to 4, the tube expansion head 4 includes a base portion 41, a main body portion 42 and an tube expansion portion 43, and the base portion 41, the main body portion 42 and the tube expansion portion 43 are connected in sequence and are processed to form the tube expansion head 4 through an integral molding process. The inside of the tube expansion head 4 is provided with a cavity 45 which passes through the base part 41, the main body part 42 and the tube expansion part 43, and the cavity 45 positioned inside the tube expansion part 43 is a conical cavity; the main body part 42 and the tube expansion part 43 are provided with 4 grooves 44 extending along the axial direction, the 4 grooves 44 are respectively arranged along the circumferential direction of the main body part 42 and the tube expansion part 43 at equal intervals, and each groove 44 is communicated with the cavity 45. The main body part 42 is of a cylindrical structure, the tube expanding part 43 comprises a connecting part 431 and a tube expanding end 432 which are connected, the main body part 42 and the tube expanding end 432 are connected in a smooth transition mode through the connecting part 431, specifically, the connecting part 431 is of a circular truncated cone-shaped structure, the top surface of the connecting part 431 is connected with the main body part 42, and the bottom surface of the connecting part 431 is connected with the tube expanding end 432. The diameter of the tapered cavity decreases from the connecting portion 431 to the expansion end 432. The connecting part 431 and the expanding tube end 432 of the expanding tube part 43 are respectively divided into 4 parts by 4 grooves 44, wherein the connecting part 431 is divided into 4 conical surfaces, the expanding tube end 432 is divided into 4 end parts, each end part is of a triangular cone structure, and the top ends of the 4 triangular cone structures are positioned in the same cylindrical surface; the 4 triangular conical ends make the whole expansion tube end 432 present a plum blossom-shaped structure, and the expansion tube head 4 with the shape can be called a plum blossom-shaped expansion tube head 4.

One end of the tube expanding needle 5 is fixedly connected with the driving mechanism, and the tube expanding needle 5 can move along the axial direction of the tube expanding head 4 in the cavity 45 of the tube expanding head 4 under the pushing of an external force (such as the driving mechanism), so that the tube expanding head 4 is pushed to expand outwards. As shown in fig. 5, the tube expanding needle 5 comprises a base 51, a main body 52 and a thimble 53, wherein the base 51, the main body 52 and the thimble 53 are connected in sequence and are processed into the tube expanding needle 5 by an integral molding process. The base 51 of the tube expanding needle 5 is a transmission part of external force, when the tube expanding needle 5 is pushed by a driving mechanism, the tube expanding needle 5 is fixedly connected with the driving mechanism through the base 51, and if the tube expanding needle is pushed by manpower, force can be directly applied to the base 51. Meanwhile, the base 51 is used for limiting the movement of the tube expanding needle 5 and preventing the tube expanding needle 5 from completely extending into the cavity 45 and being difficult to take out. The main body 52 is a cylindrical structure, the thimble 53 is a conical structure, and when the tube expansion needle 5 is inserted into the cavity 45 of the tube expansion head 4, the main body 52 and the thimble 53 are respectively matched with the cavity in the tube expansion head 4 to form a gap 11.

The positioning seat 3 accommodates and positions the valve body 2 of the four-way valve and provides a passage extending vertically to the valve body for the pipe expanding head. As shown in fig. 6, the positioning seat 3 is a rectangular parallelepiped structure, a first groove 31 extending along the length direction of the positioning seat 3 is provided on the top surface of the positioning seat 3, a second groove 32 penetrating through the top surface and the bottom surface of the positioning seat 3 is further provided on the side surface of the positioning seat 3, and the second groove 32 is vertically communicated with the middle portion of the first groove 31. The first groove 31 is used for installing and fixing the valve body 2 of the four-way valve, and the second groove 32 is a channel for the pipe expanding head 4 to extend into the valve body 2. The positioning seat 3 is further provided with a mounting hole 33 for mounting the positioning seat 3 on the workbench, and the mounting hole 33 penetrates through the top surface and the bottom surface of the positioning seat 3.

Before the four-way valve is welded integrally, the D connecting pipe 1 and the valve body 2 of the four-way valve are pre-fixed by the tool which is provided by the application and can pre-fix the four-way valve and the D connecting pipe (as shown in figures 7-9). Firstly, the positioning seat 3 and the tube expansion head 4 are respectively installed on the workbench, the valve body 2 is accurately and stably placed in the first groove 31 of the positioning seat 3, the position of the positioning seat 3 is adjusted (the positioning seat 3 can be installed on the installation seat of the workbench through the installation hole 33, and the relative position of the positioning seat 3 and the tube expansion head 4 is adjusted by adjusting the installation seat), so that the tube expansion head 4 passes through the second groove 32 on the positioning seat 3, extends to the valve body 2, then passes through the valve body joint hole 22 and the D-shaped joint hole 21, and the valve body 2 is accurately positioned. And then the D connecting pipe 1 sleeved with the welding ring is inserted in alignment with the D connecting pipe hole 21 on the valve body 2, and the cone surface of the connecting part 431 of the tube expansion head 4 positions the insertion depth of the D connecting pipe 1, so that the stability of the insertion depth of the D connecting pipe 1 is ensured. D takes over 1 and inserts the back that targets in place, promote the axial displacement of expanding tube needle 5 along cavity 45 in the inside cavity 45 of expand tube head 4, expand tube needle 5 stretches into gradually in the toper cavity of expand tube portion 43, thereby promote the expand tube portion 43 of expand tube head 4 to take place deformation and outside expansion gradually, the plum blossom form expand tube end 432 extrusion D of expand tube portion 43 after the expansion takes over 1, make D take over 1 outside expand tube and form a plurality of archs on the pipe wall, thereby make copper pipe and valve body 2 change interference fit into by the clearance 11 cooperation, thereby reach copper pipe and valve body 2 pre-connection fixed and location purpose, D takes over 1 and valve body 2's straightness that hangs down also can obtain stable control simultaneously. After the plum blossom-shaped expanded pipe end 432 expands the D connecting pipe 1, a part of gap 11 is still reserved at the joint of the D connecting pipe 1 and the valve body 2, the gap 11 is uniformly distributed, the capillary action is facilitated, and the good fluidity of the solder can be ensured in the welding process, so that the stability of the welding quality is ensured.

The invention also provides a device capable of pre-fixing the four-way valve and the D connecting pipe, the device is provided with a tool capable of pre-fixing the four-way valve and the D connecting pipe in the scheme and a driving mechanism for driving the pipe expanding needle 5 to move in the cavity 45, the driving mechanism comprises an air cylinder and a transmission mechanism, and the pipe expanding needle 5 is fixedly connected with the transmission mechanism through a base 51. In another embodiment, the driving mechanism may also be composed of a servo motor and a transmission mechanism (e.g., a cam mechanism) that can convert the rotation of the servo motor into linear motion. The device can realize that automatic to cross valve and D takeover fix in advance, reduces dependent manual operation, improves production efficiency.

In the scheme, in order to better realize automation, reduce manual operation and improve production efficiency, an automatic feeding manipulator can be additionally arranged in the driving mechanism, and the valve body 2 is accurately and stably placed on the positioning seat 3 through the automatic feeding manipulator; and the D connecting pipe 1 sleeved with the welding ring is inserted by aligning the D connecting pipe 1 with the valve body 2D connecting pipe hole 21 through an automatic pipe feeding mechanical arm, as shown in the figure, when a driving mechanism is powered by an air cylinder, the insertion depth of the D connecting pipe 1 can be controlled by the stroke of the air cylinder controlling the up-and-down motion.

In other embodiments, the tube expansion head 4 can be designed in various forms such as a cylindrical head-shaped tube expansion head, a diamond-shaped tube expansion head or a circular raised head tube expansion head. The tube expansion end 432 can also be designed as a cylindrical structure as shown in FIG. 10; or as shown in fig. 12, the tube expansion end 432 is a cylindrical structure and has an annular bulge at the top, and the tube expansion head 4 is suitable for the condition that the D-joint tube 1 has a reduced mouth, so that the tube expansion head 4 can expand the D-joint tube 1 without damaging the reduced mouth of the D-joint tube 1; or as shown in fig. 11, the tube expansion end 432 is divided into a plurality of end portions by the groove 44, each end portion has an inclined diamond end face, the diamond end face is inclined from the axis of the tube expansion head 4 to the periphery along the radial direction of the tube expansion head 4, the tube expansion effect is similar to that of a plum blossom-shaped tube expansion head, after the diamond tube expansion head expands the D connection tube 1, a part of gaps 11 are still reserved at the joint of the D connection tube 1 and the valve body 2, the gaps 11 are uniformly distributed, the capillary action is facilitated, good fluidity of the solder can be ensured in the welding process, and thus the stability of the welding quality is ensured; and the diamond tube expansion head is easier to process and form compared with the plum blossom-shaped tube expansion head.

Finally, it should be noted that: the above embodiments and examples are only used to illustrate the technical solution of the present invention, but not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments and examples, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments or examples may still be modified, or some of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments or examples of the present invention.