CN112484349A

CN112484349A - Expansion valve and production process thereof

Info

Publication number: CN112484349A
Application number: CN202011267474.4A
Authority: CN
Inventors: 王会超
Original assignee: Suzhou Zhongjie Automobile Parts Co ltd
Current assignee: Suzhou Zhongjie Automobile Parts Co ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-03-12

Abstract

The invention discloses an expansion valve and a production process thereof, relates to the technical field of valve production, and aims at solving the problem of high cost in the prior art, the invention provides the following scheme, wherein a valve body is sleeved on a sleeve seat in a threaded manner, a mixing pipe, an evaporator pipe and a condenser pipe are respectively connected to two sides of the valve body, a control device is connected to the middle of the valve body, a connecting cap is sleeved on the top of the valve body in a threaded manner, a mounting cap is sleeved on the upper side of the connecting cap in a threaded manner, and a diaphragm is clamped between the connecting cap and the mounting cap.

Description

Expansion valve and production process thereof

Technical Field

The invention relates to the technical field of valve production, in particular to an expansion valve and a production process thereof.

Background

An expansion valve is an important component in a refrigeration system and is typically mounted between the reservoir and the evaporator. The expansion valve enables the medium-temperature high-pressure liquid refrigerant to be low-temperature low-pressure wet steam through throttling, then the refrigerant absorbs heat in the evaporator to achieve the refrigeration effect, and the expansion valve controls the flow of the valve through the change of the superheat degree of the tail end of the evaporator to prevent the phenomena of insufficient utilization of the area of the evaporator and cylinder knocking.

The existing expansion valve is generally designed in an integral manner, is produced and installed in the early stage, has great inconvenience in later-stage maintenance, has strict requirements on each part, and improves the production cost.

Disclosure of Invention

The expansion valve and the production process thereof provided by the invention solve the problem of high cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an expansion valve, includes the cover seat, the screw thread has cup jointed the valve body on the cover seat, the both sides of valve body are connected with hybrid tube, evaporimeter pipe and condenser pipe respectively, the intermediate junction of valve body has controlling means, the top screw thread of valve body has cup jointed the connection cap, the upside screw thread of connection cap has cup jointed the installation cap, the joint has the diaphragm between connection cap and the installation cap, be provided with adjusting device between diaphragm and the cover seat, be connected with adjusting device on the installation cap.

Preferably, adjusting device includes the adapter sleeve that cup joints with the installation cap screw thread, the top screw thread of adapter sleeve cup joints the connection lid with installation cap screw thread connection, the middle fixed connecting pipe that has cup jointed of connection lid, and the other end fixedly connected with clamping ring of connecting pipe, clamping ring one side is connected with a plurality of contact tubes, the outer wall fixedly connected with contact sleeve of contact tube and clamping ring.

Preferably, the cross section of the contact sleeve is of a C-shaped structure, and the contact pipe is made of brass.

Preferably, the control device comprises a guide sleeve in threaded sleeve connection with the inner wall of the valve body, an adjusting ring is in threaded sleeve connection with the inner wall of the guide sleeve, a first spring is in sleeve connection with the upper side of the adjusting ring, a sealing plug is connected to the other end of the first spring in an extrusion mode, a guide rod is in sleeve connection with the upper end of the sealing plug in a threaded sleeve connection mode, a limiting block in sleeve connection with the valve body in a threaded sleeve connection mode is slidably arranged on the outer wall of the guide rod, a second spring is in sleeve connection with the limiting block in a sleeved mode, the second spring is in contact with the guide rod in a contact mode, and the.

Preferably, the cross section of the guide rod adopts a T-shaped structure, and the outer side cross section of the limiting block adopts an inclined L-shaped structure.

Preferably, the lower side of the adjusting ring is provided with a first automatic nut connected with the guide sleeve, the lower side of the guide sleeve is provided with a second stop nut connected with the valve body, and the outer walls of the guide sleeve, the adjusting ring and the limiting block are fixedly connected with rubber sealing rings.

Preferably, the valve body and the mixing pipe are integrally formed, and the valve body is fixedly welded or in threaded connection with the evaporator pipe and the condenser pipe.

A production process of an expansion valve comprises the following steps:

s1: the valve body, the sleeve seat, the mixing pipe, the evaporator pipe, the condenser pipe, the connecting cap, the mounting cap, the guide sleeve, the limiting block and the connecting sleeve are cast and molded, and tapping or threading is carried out at the position of a required thread after quenching and tempering to form a matched thread.

S2: the valve body is selected, then the evaporator pipe and the condenser pipe are installed, the whole device is convenient to take, then the second spring is sleeved outside the guide rod outside the valve body, the guide rod is sleeved in the limiting block and the guide sleeve, the sealing plug is placed in the guide sleeve and connected to the guide rod, the first spring is placed in the adjusting ring, and the adjusting ring is installed in the guide sleeve in a spiral mode.

S3: and (4) placing the whole body installed in the step (S2) into a valve body, then rotating the guide sleeve to a specified position by using a tool, then rotating the adjusting limiting block to the specified position, adjusting the adjusting ring to the specified position at the same time, changing the elasticity of the first spring to complete the installation of the inner core, and then rotatably installing an upper sleeve seat for sealing.

S4: and (3) rotatably installing the upper connecting cap, connecting the upper connecting sleeve and the connecting cover to the mounting cap by the placed diaphragm, and connecting the mounting cap and the connecting cap to complete installation.

S5: and (3) filling a condensing agent with the same type as the condenser into the contact pipe at a certain temperature by using an external tool to generate proper preset pressure on the diaphragm, completing assembly, and finally packaging and protecting.

The invention has the beneficial effects that:

1: through predetermineeing a plurality of devices, can carry out different installations when the later stage is installed, then assemble again, make things convenient for the device installation of whole installation, increase the efficiency of production, make things convenient for later stage maintenance and maintenance simultaneously, can change partial spare part alone, when practicing thrift cost of maintenance, the going on of convenient maintenance.

Drawings

FIG. 1 is a schematic sectional view of a valve body of an expansion valve and a production process thereof according to the present invention;

FIG. 2 is a schematic cross-sectional front view of a contact body of an expansion valve and a process for producing the same according to the present invention;

fig. 3 is a left side cross-sectional view of an expansion valve and a contact body of a production process thereof according to the present invention.

Reference numbers in the figures: 1. a sleeve seat; 2. an adjusting ring; 3. a guide sleeve; 4. a mixing tube; 5. a valve body; 6. a second spring; 7. a connecting cap; 8. a membrane; 9. a connecting cover; 10. connecting sleeves; 11. installing a cap; 12. a limiting block; 13. an evaporator tube; 14. a guide bar; 15. a sealing plug; 16. a first spring; 17. a condenser tube; 18. connecting sleeves; 19. a contact tube; 20. a contact sleeve; 21. and (4) connecting the pipes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, an expansion valve comprises a sleeve base 1, wherein a valve body 5 is sleeved on the sleeve base 1 in a threaded manner, a mixing pipe 4, an evaporator pipe 13 and a condenser pipe 17 are respectively connected to two sides of the valve body 5, a control device is connected to the middle of the valve body 5, a connecting cap 7 is sleeved on the top of the valve body 5 in a threaded manner, a mounting cap 11 is sleeved on the upper side of the connecting cap 7 in a threaded manner, a diaphragm 8 is clamped between the connecting cap 7 and the mounting cap 11, an adjusting device is arranged between the diaphragm 8 and the sleeve base 1, an adjusting device is connected to the mounting cap 11, wherein the base 1 supports the whole device, a threaded hole or other holes can be formed in the base 1, the installation of the device is facilitated, the evaporator pipe 13 and the condenser pipe 17 respectively flow into required specific bodies, and the specific bodies are mixed by the control device in the subsequent working process, the mixing pipe 4 flows out to complete work, when the mixing pipe is installed, a control device can be installed on the outer side, then the connecting bristles 7, the diaphragm 8, the installing cap 11 and the like are installed, the mixing pipe can be operated in batches, special jigs are reduced, and the mixing pipe is convenient to produce and install.

The adjusting device comprises a connecting sleeve 10 in threaded sleeve connection with a mounting cap 11, a connecting cover 9 in threaded connection with the mounting cap 11 is in threaded sleeve connection with the top of the connecting sleeve 10, a connecting pipe 21 is fixedly sleeved in the middle of the connecting cover 9, the other end of the connecting pipe 21 is fixedly connected with a connecting ring 18, one side of the connecting ring 18 is connected with a plurality of contact pipes 19, the outer walls of the contact pipes 19 and the connecting ring 18 are fixedly connected with a contact sleeve 20, the cross section of the contact sleeve 20 is of a C-shaped structure, the contact pipe 19 is made of brass, when the adjusting device is installed, the connecting sleeve 10 is connected to the mounting cap 11 firstly, then the connecting cover 9 is connected, the contact sleeve 20 is sleeved at a specified position and is subjected to temperature change, so that the temperature of the contact pipe 9 and the temperature change of liquid in the contact pipe 19 generate thermal expansion and cold contraction, and further enters the mounting cap 11 through the connecting ring 18 and the, and (5) extruding the membrane 8 to realize subsequent control.

The control device comprises a guide sleeve 3 in threaded sleeve connection with the inner wall of a valve body 5, an adjusting ring 2 is in threaded sleeve connection with the inner wall of the guide sleeve 3, a first spring 16 is in sleeve connection with the upper side of the adjusting ring 2, a sealing plug 15 is connected to the other end of the first spring 16 in an extrusion mode, a guide rod 14 is in threaded sleeve connection with the upper end of the sealing plug 15, a limiting block 12 in threaded sleeve connection with the valve body 5 is in sliding sleeve connection with the outer wall of the guide rod 14, a second spring 6 is in sleeve connection with the limiting block 12, the second spring 6 is in contact with the guide rod 14, the top of the guide rod 14 is in contact with a diaphragm 8, the cross section of the guide rod 14 is of a T-shaped structure, the outer side cross section of the limiting block 12 is of an inclined L-shaped structure, and after installation, the guide rod 14 is driven to overcome the elasticity of the second spring 6 and the first spring, make guide bar 14 remove down, further drive sealing plug 15 remove down for sealing plug 15 and uide bushing 3 separate, the fluid in condenser pipe 17 enters into the top of guide bar 3 through guide bar 3, and then joins with the fluid in the evaporator tube, then through the mixture of mixing tube 4, accomplishes the mixing.

The downside of adjusting ring 2 is provided with the first automatic nut that is connected with uide bushing 3, the downside of uide bushing 3 is provided with the second lock nut that is connected with valve body 5, the equal fixedly connected with rubber seal of outer wall of uide bushing 3, adjusting ring 2, limiting block 12, automatic nut avoids becoming flexible, and the rotatory position of threaded connection is drawn a line when producing simultaneously, guarantees the stability of position.

The valve body 5 and the mixing pipe 4 are integrally formed, and the valve body 5 is fixedly welded or in threaded connection with the evaporator pipe 13 and the condenser pipe 17.

A production process of an expansion valve comprises the following steps:

s1: the valve body 5, the sleeve seat 1, the mixing pipe 4, the evaporator pipe 13, the condenser pipe 17, the connecting cap 7, the mounting cap 11, the guide sleeve 3, the limiting block 12 and the connecting sleeve 10 are cast and formed, tapping is carried out after quenching and tempering or threading is carried out at the position where threads are needed, matched threads are formed, the mechanical strength of the whole device can be guaranteed through casting and forming, the generation of internal stress is reduced, the threads are machined, and the convenience of later-stage installation is guaranteed.

S2: selecting a valve body 5, installing an evaporator pipe 13 and a condenser pipe 17, facilitating taking of the whole device, then connecting a second spring 6 outside the valve body 5, sleeving a guide rod 14 into a limiting block 12 and a guide sleeve 3, placing a sealing plug 15 in the guide sleeve 3 and connecting the sealing plug to the guide rod 14, placing a first spring 16 in an adjusting ring 2, spirally installing the adjusting ring 2 into the guide sleeve 3, installing a control outside, namely sleeving the guide rod 14 into the limiting block 12 and the guide sleeve 3, realizing device connection, ensuring a connection gap between the limiting block 12 and the guide rod 14 in the sleeving process, and adjusting the position of the spring after the installation to avoid uneven stress.

S2: the whole body installed in the step S2 is placed in the valve body 5, then the guide sleeve 3 is rotated to a specified position by using a tool, then the limiting block 12 is rotated to a specified position, meanwhile, the adjusting ring 2 is adjusted to a specified position, the elastic force of the first spring 16 is changed, the installation of the inner core is completed, then the sleeve seat 1 is rotatably installed to seal, during installation, the guide sleeve 3 or the limiting block 12 can be clamped by using a certain auxiliary tool, the entering of the device can be facilitated, meanwhile, when the guide sleeve is installed to a specified position, fine adjustment is carried out, the stability of each position is guaranteed, then a stop nut is installed, and the shaking in the later working process is avoided.

S3: connect cap 7 in the rotatory installation, the diaphragm 8 of placing connects connection cover 10 and connects 9 to installation cap 11 on, will install cap 11 again and connect between the cap 7, accomplish the installation, when the installation film, aim at the groove on the connection cap, conveniently get into, the extrusion of cooperation installation cap 11 guarantees the stability of diaphragm 8, the going on of realization function.

S4: the condensing agent with the same type as the condenser is filled in the contact pipe 19 at a certain temperature through an external tool to generate proper preset pressure on the diaphragm 8, so that the assembly is completed, and finally, the packaging protection is carried out, and the stability of the liquid in working is ensured according to the preset temperature.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides an expansion valve, includes cover seat (1), its characterized in that, the screw thread has cup jointed valve body (5) on cover seat (1), the both sides of valve body (5) are connected with hybrid tube (4), evaporator tube (13) and condenser tube (17) respectively, the intermediate junction of valve body (5) has controlling means, the top screw thread of valve body (5) has cup jointed connection cap (7), the upside screw thread of connecting cap (7) has cup jointed installation cap (11), the joint has diaphragm (8) between connection cap (7) and installation cap (11), be provided with adjusting device between diaphragm (8) and the cover seat (1), be connected with adjusting device on installation cap (11).

2. An expansion valve according to claim 1, wherein the adjusting device comprises a connecting sleeve (10) in threaded sleeve connection with the mounting cap (11), a connecting cover (9) in threaded connection with the mounting cap (11) is in threaded sleeve connection with the top of the connecting sleeve (10), a connecting pipe (21) is fixedly sleeved in the middle of the connecting cover (9), a connecting ring (18) is fixedly connected to the other end of the connecting pipe (21), a plurality of contact pipes (19) are connected to one side of the connecting ring (18), and a contact sleeve (20) is fixedly connected to the outer walls of the contact pipes (19) and the connecting ring (18).

3. An expansion valve according to claim 2, wherein the contact sleeve (20) has a C-shaped cross-section and the contact tube (19) is made of brass.

4. An expansion valve according to claim 1, wherein the control device comprises a guide sleeve (3) in threaded connection with the inner wall of the valve body (5), the inner wall of the guide sleeve (3) is in threaded connection with an adjusting ring (2), a first spring (16) is sleeved on the upper side of the adjusting ring (2), a sealing plug (15) is connected to the other end of the first spring (16) in a squeezing manner, a guide rod (14) is sleeved on the upper end of the sealing plug (15), a limiting block (12) in threaded connection with the valve body (5) is slidably sleeved on the outer wall of the guide rod (14), a second spring (6) is sleeved on the limiting block (12), the second spring (6) is in contact with the guide rod (14), and the top of the guide rod (14) is in contact with the diaphragm (8).

5. An expansion valve according to claim 4, wherein the guide rod (14) has a T-shaped cross-section and the limiting block (12) has an inclined L-shaped cross-section.

6. An expansion valve according to claim 1, wherein the adjusting ring (2) is provided at its lower side with a first automatic nut connected to the guide sleeve (3), the guide sleeve (3) is provided at its lower side with a second stop nut connected to the valve body (5), and the outer walls of the guide sleeve (3), the adjusting ring (2) and the limiting block (12) are all fixedly connected with rubber sealing rings.

7. An expansion valve according to claim 1, wherein the valve body (5) is formed integrally with the mixing tube (4), and the valve body (5) is fixedly welded or screwed to both the evaporator tube (13) and the condenser tube (17).

8. A production process of an expansion valve is characterized by comprising the following steps:

s1: casting and molding a valve body (5), a sleeve seat (1), a mixing pipe (4), an evaporator pipe (13), a condenser pipe (17), a connecting cap (7), a mounting cap (11), a guide sleeve (3), a limiting block (12) and a connecting sleeve (10), and then tapping or threading at a position needing threads after quenching and tempering to form matched threads;

s2: selecting a valve body (5), installing an evaporator pipe (13) and a condenser pipe (17) to facilitate taking the whole device, connecting a second spring (6) outside a guide rod (14) outside the valve body (5), sleeving the guide rod (14) into a limiting block (12) and a guide sleeve (3), placing a sealing plug (15) in the guide sleeve (3) and connecting the sealing plug to the guide rod (14), placing a first spring (16) in an adjusting ring (2), and spirally installing the adjusting ring (2) in the guide sleeve (3);

s3: the whole body which is installed in the step S2 is placed in a valve body (5), then a tool is used for rotating a guide sleeve (3) to a specified position, then a regulation limiting block (12) is rotated to the specified position, meanwhile, a regulation ring (2) is regulated to the specified position, the elasticity of a first spring (16) is changed, the installation of an inner core is completed, and then an upper sleeve seat (1) is rotatably installed for sealing;

s4: rotatably installing a connecting cap (7), connecting an upper connecting sleeve (10) and a connecting cover (9) to the mounting cap (11) by a placed diaphragm (8), and connecting the mounting cap (11) and the connecting cap (7) to finish installation;

s5: the contact pipe (19) is filled with a condensing agent with the same type as the condenser at a certain temperature by an external tool to generate proper preset pressure on the diaphragm (8), so that the assembly is completed, and finally, the packaging protection is carried out.