CN210949939U

CN210949939U - Electric valve

Info

Publication number: CN210949939U
Application number: CN201921398388.XU
Authority: CN
Inventors: 王林炜
Original assignee: Zhejiang Zhongbao Auto Control Component Co ltd
Current assignee: Zhejiang Zhongbao Auto Control Component Co ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-07-07
Anticipated expiration: 2029-08-27

Abstract

The utility model provides an electrically operated valve, including the dustcoat, the rotor, the disk seat bracing piece, the rotor supporter, the case seat, the shroud takes over one, takes over two, the spring, the gasket, the snap ring, the dabber welds the ring. The utility model has the advantages that: the utility model improves the reliability of rotor guiding, and the rotor operates more stably; the utility model realizes the miniaturization of the electronic expansion valve; the utility model ensures the air tightness of the mandrel and the outer cover, and can not increase the friction resistance moment; the assembly coaxiality of the rotor and the rotor supporting body of the utility model is easy to ensure; the utility model discloses a screw member and mount pad of rotor supporter adopt the mode location of two pairs of convex-concave blocks, and the assembly axiality is guaranteed easily between the two.

Description

Electric valve

Technical Field

The utility model relates to the technical field of valving, concretely relates to motorised valve.

Background

The electric valve is mainly applied to refrigeration equipment, is a core element of a variable-frequency refrigeration system, is matched with a variable-frequency compressor, and adjusts the flow passing through the electric valve by changing the flow area of a valve port, so that the refrigeration equipment is always in the optimal operation condition. In order to reduce the production cost of the electric valve, the plastic and molding of the core parts is a necessary trend. The reliability of the electric valve is also very important, and if the electric valve fails to open, the function of the whole machine is lost, and even the compressor is damaged. The more stable the rotor runs in the rotating process, the less the main parts of the electric valve are worn and the lower the running noise is.

CN104197030B provides a solution for improving the working stability of the rotor, in which the external screw thread component is directly or indirectly connected and fixed with the rotor, and the internal screw thread component supports the external screw thread component, so as to ensure the stable working of the rotor. However, in order to realize the purpose that the retainer is concealed in the inner cavity of the rotor, the position of the internal thread part for supporting the external thread part is at the position which is lower than the center of the rotor, so that the supporting effect of the external thread part on the rotor is limited, the rotor still has the problems of eccentricity and the like in the running process, and the running stability of the rotor is influenced.

SUMMERY OF THE UTILITY MODEL

For solving above-mentioned problem comprehensively, especially to the not enough that prior art exists, the utility model provides an above-mentioned problem can be solved comprehensively to the motorised valve.

In order to achieve the above object, the utility model adopts the following technical means:

an electric valve comprises an outer cover, a valve core seat and an integral or split structure cover extending outwards from the valve core seat, wherein a first connecting pipe is welded on the cover, a second connecting pipe is welded on the outer cover, the outer cover is welded on the periphery of the cover in a sealing manner, the integral or split structure cover, the first connecting pipe and the second connecting pipe which extend outwards from the outer cover, the valve core seat and the valve core seat form a sealed cavity with an inlet and an outlet, a rotor and a rotor support body directly or indirectly connected with the rotor are arranged in the outer cover, a mandrel is arranged at the top of the outer cover and is in embedded support connection with a small hole in the rotor support body, a valve seat support rod is further arranged in the outer cover, threads are arranged in the valve seat support rod, threads are arranged at the bottom end of the rotor support body, and the threads in;

the utility model discloses a rotor support structure, including rotor support body, dabber supporting body center is provided with the dabber guiding hole, the dabber stretches into in the dabber guiding hole and inlays with rotor support body trip and support and be connected, still be provided with the spring in the rotor support body and hold the chamber, the spring holds the chamber and sets up in dabber guiding hole lower part, the spring holds and installs hollow spring in the chamber. When the rotor moves, the spindle can enter the central hole of the spring.

Furthermore, the upper end of the outer cover is provided with a small hole, the mandrel is fixed in the small hole, and the mandrel and the outer cover are positioned by fusion welding.

Furthermore, the rotor support body consists of a threaded part and a mounting seat, wherein the threaded part is provided with external threads, the threaded part and the mounting seat are oppositely mounted and connected, the threaded part and the mounting seat are oppositely and tightly combined to form a hollow cavity, the cavity consists of a mandrel guide hole, a spring accommodating cavity and a valve core guide hole, and the spring accommodating cavity is arranged at the upper part of the valve core guide hole; the valve core is movably connected with the valve core guide hole, and the bottom end of the valve core corresponds to a valve port of the valve core seat. The valve seat support rod and the valve core seat are embedded and injection-molded, and the internal thread in the valve seat support rod and the valve seat support rod are integrally injection-molded to form a first guide hole.

Further, be equipped with interior circumference of rotor and rotor step hole in the rotor, rotor step hole sets up in the interior circumference top of rotor, the rotor step hole communicates with each other with the interior circumference of rotor, form outer circumference one when the screw is moulded plastics, form outer circumference two when the mount pad is moulded plastics, outer circumference one forms outer circumference of rotor supporter and step portion with outer circumference two after the opposite direction installation, the interior circumference of rotor cooperates with the outer circumference of rotor supporter, step portion and the cooperation of rotor step hole.

Furthermore, a groove is further formed in the rotor supporting body, and a clamping ring is sleeved in the groove.

Further, the dabber is the step form, the dabber includes first step, first step and the aperture cooperation of dustcoat up end, first step bottom is equipped with fixed connection's second step, second step diameter is greater than first step, second step bottom is equipped with fixed connection's third step, third step diameter is less than the second step, the third step inserts rotor supporter upper end and is connected with the rotor supporter.

Furthermore, a welding ring is arranged at the joint of the first step and the second step.

Furthermore, the valve core guide hole is arranged on the screw thread piece, the spring accommodating cavity is formed by a first semi-cylindrical hole on the screw thread piece and a second semi-cylindrical hole on the mounting seat, the upper part of the mounting seat is provided with an end plate part extending outwards from the base body of the mounting seat, the lower end surface of the end plate part is abutted against the upper end surface of the external screw thread piece, the end plate part is also provided with a downward extending boss, the semi-cylinder of the downward extending boss protrudes out of the semi-plane of the mounting seat, the screw thread pieces are provided with corresponding pits which are concave and semi-cylindrical, the pits are matched with each other, the screw thread is also provided with a semi-cylindrical boss, the mounting seat is provided with corresponding semi-cylindrical concave pits which are matched with each other, the mandrel guide holes are arranged on the end plate part of the mounting seat and the downward extending lug bosses of the end plate part, the lower part of the downward extending boss is a spring accommodating cavity, and one end face of the spring is abutted to the downward extending boss.

Furthermore, a lower moving stop boss and an upper moving stop boss are arranged on the mounting seat, and a lower static moving boss and an upper static moving boss are arranged on the valve seat supporting rod.

Furthermore, an outward convex mounting seat boss is further arranged on the mounting seat, a screw pit is formed in the screw, and the screw pit mounting seat boss is clamped in a convex-concave mode.

The utility model has the advantages that: the rotor of the utility model adopts the lower guiding support of the screw thread and the upper guiding support of the mandrel respectively, thereby simplifying the injection molding difficulty of the screw thread piece and the valve seat support rod (canceling the guiding section at the upper part of the screw thread in the prior art), improving the reliability of the rotor guiding (the upper and lower guiding of the rotor is equivalent to the guiding of the whole rotor height), and leading the rotor to run more stably; when the rotor moves upwards, the mandrel can use the space of the spring accommodating cavity, so that the miniaturization of the electronic expansion valve can be realized under the condition that products are increased and guided; the utility model discloses a technology that dabber and dustcoat adopt fusion welding location to weld again, can guarantee the axiality of dabber and dustcoat through fusion welding location, guarantee dabber and dustcoat gas tightness through the furnace welding (the dabber external diameter is very little, and fusion welding alone hardly guarantees the integrality of welding seam, and the furnace welding alone hardly guarantees the axiality of dabber and dustcoat again). And meanwhile, the welding ring is arranged on the first step, and the welding ring is not easy to fall off. The mandrel and the rotor support body are guided, the outer diameter of the guiding part of the mandrel is small, the friction force arm of the mandrel contacted with a single side in the guiding process is small, and the friction resistance moment cannot be additionally increased; the rotor and the rotor support body of the utility model adopt a double-positioning scheme, and the positioning length is long, and the assembly coaxiality of the rotor and the rotor support body is easy to ensure; the utility model discloses a screw member and mount pad of rotor supporter adopt the mode location of two pairs of convex-concave blocks, and the assembly axiality is guaranteed easily between the two.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the rotor support of the present invention.

Fig. 3 is a schematic structural diagram of the screw member of the present invention.

Fig. 4 is a schematic structural diagram of the mounting seat of the present invention.

Detailed Description

The technical solution of the present invention will be clearly and completely described with reference to the accompanying drawings.

As shown in fig. 1 to 4, the utility model provides an electrically operated valve, including dustcoat 1, valve core seat 7, by the outside integrative or components of a whole that extend structure shroud 8 of valve core seat, shroud 8 on the welding have a takeover 9, the dustcoat on the welding have takeover two 10, dustcoat sealing weld in the periphery of shroud 8. The outer cover 1, the valve core seat 7, the integral or split structure cover 8 extending outwards from the valve core seat, the first connecting pipe 9 and the second connecting pipe 10 form a sealed cavity with an inlet and an outlet.

The rotor 2 and the rotor support body 5 directly or indirectly connected with the rotor 2 are also arranged in the outer cover, and the top end of the rotor support body 5 is provided with a mandrel guide hole 52 a. The top of the outer cover is also provided with a mandrel 15, and the mandrel 15 extends into the mandrel guide hole 52a to support the rotor 2. Meanwhile, the mandrel 15 extends into the rotor support body 5, so that the mandrel 15 does not occupy more space of the electric valve for supporting the rotor 2, and the electric valve can still be miniaturized.

A valve seat support rod 4 is further arranged in the outer cover 1, a thread 4c is arranged on the valve seat support rod 4, a thread 5c is correspondingly arranged on the rotor support body 5, and one of the

threads

4c and 5c is an internal thread and the other is an external thread. The screw thread of the rotor support 5 is engaged with the screw thread of the valve seat support rod 4, and on one hand, the rotational motion of the rotor 2 is converted into a linear motion, and on the other hand, the rotor 2 is supported. Because the upper end of the rotor 2 is supported by the mandrel 15, and the lower end of the rotor 2 is supported by the threads, the rotor 2 is not easy to be eccentric, and the rotor 2 can run more stably.

The valve seat support rod 4 and the valve core seat 7 are embedded and injection molded, and the threads 4c on the support rod and the support rod are integrally injection molded to form a first guide hole 4 b. The rotor support body 5 is composed of a screw 51 and a mounting seat 52, the screw 51 and the mounting seat 52 are formed by injection molding, and the screw 5c and the screw 51 are integrally formed by injection molding. The mounting seat 52 is provided in a pair with the screw 51, and faces and is tightened to form the rotor support body 5. The screw 51 forms an outer circumference 51s during injection molding, the mounting seat 52 forms an outer circumference 52s during injection molding, the two are oppositely mounted to form a rotor support body outer circumference 5d, the rotor inner circumference 2a is matched with the support body outer circumference 5d to ensure the mounting coaxiality of the rotor support body, and meanwhile, the rotor support body is further provided with a step part 5f, and the step part 5f is matched with the rotor step hole 2 b. The rotor support body 5 is also provided with a groove 5n, a snap ring 14 is arranged in the groove 5n, the axial positioning of the rotor 2 and the rotor support body 5 is realized, and the snap ring 14 not only limits the axial movement of the rotor, but also tightly holds the screw 51 and the mounting seat 52 to integrate the two. Because the rotor 2 and the rotor support body 5 adopt the mode of twice positioning and the positioning length can be designed to be very long, the coaxiality of the installation of the rotor 2 and the rotor support body 5 is ensured

The rotor supporting part screw member 51 and the mounting seat 52 are opposite and tightly connected to form a hollow cavity, and the cavity is divided into three parts: a valve core guide hole 5e, a spring accommodating cavity 5a and a mandrel guide hole 52a, wherein the mandrel guide hole 52a is arranged at the upper part of the spring accommodating cavity 5a, when the rotor 2 rotates along the valve opening direction, the rotor 2 moves upwards, the mandrel 15 moves downwards relative to the rotor 2, and the mandrel 15 can freely move in the spring accommodating cavity 5 a. The moving space of the mandrel 15 borrows the space of the spring accommodating cavity 5a, so that the miniaturization of the electric valve can be realized under the condition of increasing the guide on the mandrel 15.

The valve core 6 is arranged in the valve core guide hole 5e of the rotor support body in a freely embedded mode, the top end of the valve core 6 is sequentially provided with a gasket 12 and a spring 11, and the spring 11 and the gasket 12 are arranged in the spring accommodating cavity 5 a. Since the outer diameter of the stem 15 is smaller than the inner diameter of the spring 11, the inner space of the spring 11 can be used when the stem 15 moves down. The valve core 6 and the rotor support body 5 form a free-embedded design structure which can move axially, swing with small displacement and rotate freely, so that the valve core 6 can move reliably. At the same time, the spindle 15 can also move freely in the spring installation chamber 5 a. The valve core 6 approaches or departs from the valve port 7a through the first guide hole 4b of the valve seat support rod 4, thereby changing the flow area of the valve port.

The valve core guide hole 5e is arranged on the screw member 51, and the spring accommodating cavity 5a is formed by a first semi-cylindrical hole 51d on the screw member 51 and a second semi-cylindrical hole 52d on the mounting seat 52. An end plate 52c extending outward from the base body of the mounting seat 52 is provided on the upper portion of the mounting seat 52, and the lower end surface of the end plate 52c abuts against the upper end surface 51c of the male screw 51. The end plate part 52c is further provided with a downward extending boss 52b, a semi-cylinder of the downward extending boss 52b protrudes out of the semi-plane of the mounting seat 52, the screw is provided with a corresponding pit 51b which is sunken to be a semi-cylinder, and the two are mutually matched. Meanwhile, the screw thread piece is also provided with a semi-cylindrical boss 51e, and the mounting seat is provided with a corresponding semi-cylindrical pit 52e which are matched with each other. The installation coaxiality of the installation seat 52 and the external thread element 51 is ensured by the two-time convex-concave clamping of the installation seat and the thread element 51. The mandrel guide hole 52a is arranged on the end plate part 52c of the mounting seat and the downward extending boss 52b of the end plate part, the lower part of the downward extending boss 52b is a spring accommodating cavity 5a, and one end face of the spring 11 is abutted to the downward extending boss 52 b.

The mandrel 15 is fixed in the small hole 1a on the upper end face of the outer cover, the mandrel 15 is designed to be step-shaped, the small hole 1a on the upper end face of the outer cover is matched with the first step 15b, the diameter of the second step 15a is larger than that of the first step 15b, and the first step 15b is also provided with a welding ring 16 in advance. The third step 15c is smaller than the second step 15a, and the third step 15c is matched with the small hole at the upper end of the rotor support body 5 to form the upper guide of the rotor. The fixing process of the mandrel 15 comprises the following steps: a welding ring 16 is pre-supported on a step at the top end of a mandrel 15, the mandrel 15 is inserted into a small hole 1a in the upper end face of an outer cover 1, the periphery of the mandrel 15 and the inner periphery of the outer cover are coaxially positioned by adopting a tool, the top end of the mandrel is fixed by laser welding, and the mandrel is placed into a tunnel furnace for welding and fixing after the outer cover 1 is inserted into a transverse connecting pipe (the welding ring is pre-arranged on the welding pipe).

The mounting seat 52 is provided with a lower movable stop boss 52h \52f and an upper movable stop boss 4e \4d, the lower movable stop boss 52h of the mounting seat touches the lower movable stop boss 4e of the valve seat support rod when the rotor reaches a preset 0 pulse in the valve closing direction, and the rotor cannot continuously rotate in the valve closing direction; when the rotor reaches a preset full-open pulse in the valve opening direction, the movable stop boss 52f on the mounting seat touches the static movable boss 4d on the valve seat supporting rod, and the rotor cannot continuously rotate in the valve opening direction; the travel of the valve core of the electric valve is ensured to be changed within a preset range by arranging the stop mechanism.

The mounting seat 52 is also provided with a mounting seat boss 52m protruding outwards, the screw 51 is provided with a screw concave pit 51m, and the screw concave pit are engaged with each other in a convex-concave manner to define the assembling position of the screw and the screw.

The utility model relates to an electric valve, the rotor of the utility model adopts a screw thread lower guide support and a mandrel upper guide support respectively, which not only simplifies the injection molding difficulty of a screw thread piece and a valve seat support rod (cancels the guide section at the upper part of a screw thread in the prior art), but also improves the reliability of rotor guide (the upper and lower guide of the rotor is equivalent to the guide of the whole rotor height), and the rotor runs more stably; when the rotor moves upwards, the mandrel can use the space of the spring accommodating cavity, so that the miniaturization of the electronic expansion valve can be realized under the condition that products are increased and guided; the utility model discloses a technology that dabber and dustcoat adopt fusion welding location to weld again, can guarantee the axiality of dabber and dustcoat through fusion welding location, guarantee dabber and dustcoat gas tightness through the furnace welding (the dabber external diameter is very little, and fusion welding alone hardly guarantees the integrality of welding seam, and the furnace welding alone hardly guarantees the axiality of dabber and dustcoat again). And meanwhile, the welding ring is arranged on the first step, and the welding ring is not easy to fall off. The mandrel and the rotor support body are guided, the outer diameter of the guiding part of the mandrel is small, the friction force arm of the mandrel contacted with a single side in the guiding process is small, and the friction resistance moment cannot be additionally increased; the rotor and the rotor support body of the utility model adopt a double-positioning scheme, and the positioning length is long, and the assembly coaxiality of the rotor and the rotor support body is easy to ensure; the utility model discloses a screw member and mount pad of rotor supporter adopt the mode location of two pairs of convex-concave blocks, and the assembly axiality is guaranteed easily between the two.

The present invention is illustrated by way of example and not by way of limitation. It will be apparent to those skilled in the art that other variations and modifications of the present invention can be made in light of the above teachings, and it is not necessary or necessary to exhaustively enumerate all embodiments herein, and it is intended that all such obvious variations and modifications are within the scope of the present invention.

Claims

1. An electric valve comprises an outer cover, a valve core seat, an integral or split structure cover extending outwards from the valve core seat, the cover is welded with a first connecting pipe, the outer cover is welded with a second connecting pipe, the outer cover is welded on the periphery of the cover in a sealing manner, the outer cover, the valve core seat, the integral or split structure cover extending outwards from the valve core seat, the first connecting pipe and the second connecting pipe form a sealed cavity with an inlet and an outlet, it is characterized in that the outer cover is internally provided with a rotor and a rotor supporting body directly or indirectly connected with the rotor, the top of the outer cover is provided with a mandrel which is in movable embedded support connection with the small hole on the rotor support body, a valve seat support rod is further arranged in the outer cover, threads are arranged in the valve seat support rod, threads are arranged at the bottom end of the rotor support body, and the rotor support body and the threads in the valve seat support rod are screwed together;

the utility model discloses a rotor support structure, including rotor support body, dabber supporting body center is provided with the dabber guiding hole, the dabber stretches into in the dabber guiding hole and inlays with rotor support body trip and support and be connected, still be provided with the spring in the rotor support body and hold the chamber, the spring holds the chamber and sets up in dabber guiding hole lower part, the spring holds and installs hollow spring in the chamber.

2. An electrically operated valve as claimed in claim 1 wherein the upper end of the housing is provided with an aperture, the spindle being secured in the aperture, the spindle and housing being positioned by fusion welding.

3. The electric valve according to claim 2, wherein the rotor support comprises a screw member and a mounting seat, the screw member is provided with an external thread, the screw member is installed and connected with the mounting seat in an opposite manner, the screw member and the mounting seat are opposite and tightly connected to form a hollow cavity, the cavity comprises a mandrel guide hole, a spring accommodating cavity and a valve core guide hole, and the spring accommodating cavity is arranged at the upper part of the valve core guide hole; the valve core is movably connected with the valve core guide hole, and the bottom end of the valve core corresponds to a valve port of the valve core seat; the valve seat support rod and the valve core seat are embedded and injection-molded, and the internal thread in the valve seat support rod and the valve seat support rod are integrally injection-molded to form a first guide hole.

4. The electrically operated valve according to claim 3, wherein a rotor inner periphery and a rotor step hole are formed in the rotor, the rotor step hole is formed at the top end of the rotor inner periphery, the rotor step hole is communicated with the rotor inner periphery, the screw member forms a first outer periphery during injection molding, the mounting seat forms a second outer periphery during injection molding, the first outer periphery and the second outer periphery are installed oppositely to form a rotor supporting body outer periphery and a step part, the rotor inner periphery is matched with the rotor supporting body outer periphery, and the step part is matched with the rotor step hole.

5. The electrically operated valve of claim 4, wherein said rotor support body further comprises a groove, and a snap ring is engaged in said groove.

6. The electric valve as claimed in claim 5, wherein the core shaft is stepped, the core shaft comprises a first step, the first step is matched with the small hole on the upper end surface of the housing, the bottom end of the first step is provided with a fixedly connected second step, the diameter of the second step is larger than that of the first step, the bottom end of the second step is provided with a fixedly connected third step, the diameter of the third step is smaller than that of the second step, and the third step is inserted into the upper end of the rotor support body and connected with the rotor support body.

7. The electric valve as claimed in claim 6, wherein the joint of the first step and the second step is provided with a welding ring.

8. The electric valve according to claim 7, wherein the valve core guiding hole is formed in the screw member, the spring receiving cavity is formed by a first semi-cylindrical hole in the screw member and a second semi-cylindrical hole in the mounting seat, the upper portion of the mounting seat is provided with an end plate portion extending outward from the base of the mounting seat, a lower end surface of the end plate portion abuts against an upper end surface of the external screw member, the end plate portion is further provided with a downwardly extending boss, the semi-cylindrical protrusion of the downwardly extending boss protrudes out of a semi-plane of the mounting seat, the screw member is provided with corresponding semi-cylindrical recesses for fitting with each other, the screw thread is further provided with a semi-cylindrical boss, the mounting seat is provided with corresponding semi-cylindrical recesses for fitting with each other, the mandrel guiding hole is formed in the end plate portion of the mounting seat and the downwardly extending boss of the end plate portion, and a lower portion of the downwardly extending boss is provided with the spring receiving cavity, and the end face of one end of the spring is abutted against the downward extending boss.

9. The electric valve as claimed in claim 8, wherein the mounting seat is provided with a lower stop boss and an upper stop boss, and the valve seat support rod is provided with a lower stationary boss and an upper stationary boss.

10. The electric valve as claimed in claim 9, wherein the mounting seat further comprises an outwardly protruding mounting seat boss, and the screw member comprises a screw member recess, and the screw member recess and the mounting seat boss are engaged with each other in a male-female manner.