Electric valve retainer and electric valve

Abstract

The utility model relates to the technical field of valves, and discloses an electrically operated valve retainer and an electrically operated valve.The electrically operated valve comprises a retainer body, the retainer body extends in the first direction and is provided with a first retainer part and a second retainer part which extend in the first direction and are opposite in direction, and the first retainer part and the second retainer part are arranged on the retainer body. The first stop part and the second stop part are used for limiting the initial position of a valve element assembly, and a positioning hole used for being assembled with the valve element assembly is formed in the stop body in the first direction. The utility model has the beneficial effects that the structure of the retainer is simplified, the processing cost is reduced, meanwhile, when the retainer is installed, the assembly direction does not need to be distinguished, the error of the retainer during installation can be avoided, and the overall assembly efficiency of the electrically operated valve is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially is related to a kind of electric valve stopper and electric valve. BACKGROUND

[0002] Electric valve is mostly used in refrigeration system to adjust the flow of refrigerant. When the electric valve operates, the magnetic rotor assembly rotates under the action of magnetic force, which can transmit torque to the valve needle through the transmission mechanism, thereby driving the valve needle to rise and fall. The valve needle adjusts the flow of the valve and controls the on-off of the valve during the rising and falling process.

[0003] In order to facilitate the determination of the initial position of the valve needle of the electric valve, a stopper is provided, which mechanically limits the rotation of the magnetic rotor assembly to ensure that the valve needle can be accurately positioned at the preset initial position. The existing stopper is assembled by multiple parts, and the overall structure is complex, with high processing cost. At the same time, the stopper has only one end provided with a limiting structure, and no corresponding mistake-proofing structure is provided. Therefore, when the stopper is installed, the assembly direction of the stopper needs to be distinguished, and the end with the limiting structure must be arranged towards the magnetic rotor assembly. If the end with the limiting structure of the stopper is arranged away from the magnetic rotor assembly, the stopper and the magnetic rotor assembly cannot be mechanically limited, resulting in limit failure. The stopper needs to be disassembled and assembled again, which is low in assembly efficiency. UTILITY MODEL CONTENT

[0004] The utility model aims to provide an electric valve stopper and electric valve, which simplifies the structure of the stopper, reduces the processing cost, and avoids errors during installation of the stopper without distinguishing the assembly direction, thereby improving the overall assembly efficiency of the electric valve.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an electric valve stopper, which comprises a stopper body, the stopper body extends along a first direction, the stopper body is provided with a first stopper part and a second stopper part extending in the first direction and in opposite directions, the first stopper part and the second stopper part are used for limiting the initial position of a valve core assembly, and the stopper body is provided with a positioning hole along the first direction for assembly with the valve core assembly.

[0006] Further, the first stopper part and the second stopper part are arranged in a central symmetrical manner.

[0007] Further, the shape of the stopper body in the cross section perpendicular to the first direction is circular, polygonal or elliptical.

[0008] Further, the opposite two side walls of the stopper body near the positioning hole locally extend in the first direction to form the first stopper part and the second stopper part.

[0009] Further, the stop body is provided with a plurality of slits in communication with the positioning hole along the first direction, the slits partially divide the stop body to form a bending part, and the bending part is bent along the first direction to form the first stop part and the second stop part.

[0010] The utility model still provides a kind of electric valve, including the electric valve stop piece of any one of the above and the valve core subassembly, further include valve needle subassembly;

[0011] The valve core subassembly includes a main valve seat, a valve seat body, a guide sleeve and a valve core body. The main valve seat is provided with a buffer cavity, a first interface and a second interface. The valve core body is installed in the buffer cavity. A side wall of the valve core body is provided with a first connecting hole in communication with the buffer cavity and the first interface. A bottom of the valve core body is provided with a second connecting hole in communication with the second interface. One end of the valve seat body is inserted into the main valve seat, and the other end extends out of the main valve seat and is fixedly connected with the stop piece at the top. One end of the guide sleeve penetrates the positioning hole and is connected with the valve seat body, and the other end extends above the valve seat body. The guide sleeve is coaxially arranged with the positioning hole.

[0012] The valve needle subassembly is threadedly connected with the guide sleeve and extends into the valve core body. The valve needle subassembly rotates around the axis of the positioning hole and reciprocates along the first direction synchronously to make the first connecting hole and the second connecting hole communicate or disconnect. The valve needle subassembly is provided with a limiting part abutting against the first stop part or the second stop part. The stop part abuts against the limiting part, and the valve needle subassembly is in an initial position.

[0013] Further, the valve needle subassembly includes a magnetic rotor assembly, a guide nut, a valve needle, a positioning sleeve, a first spring, a second spring and a housing. The magnetic rotor assembly is coaxially and fixedly connected with the guide nut. The bottom of the guide nut is provided with the limiting part abutting against the first stop part or the second stop part. One end of the guide sleeve away from the valve seat body extends into the guide nut and is rotationally connected with the guide nut. The valve needle penetrates the guide sleeve and extends into the valve core body. The first spring is sleeved outside the valve needle. One end of the first spring abuts against the valve needle, and the other end abuts against the guide nut. The first spring has a tendency to push the valve needle downward.

[0014] The top of the valve needle is sleeved with the positioning sleeve. The bottom of the positioning sleeve abuts against the guide nut. The second spring is sleeved outside the positioning sleeve. One end of the second spring abuts against the guide nut, and the other end abuts against the housing. The second spring has a tendency to push the guide nut away from the housing.

[0015] The shell cover is arranged outside the magnetic rotor assembly, and the bottom is fixedly connected with the valve seat body.

[0016] Further, the valve seat body comprises an annular body, a through hole is arranged in the middle of the annular body along the first direction, a first groove, a second groove and a third groove coaxial with the through hole are sequentially arranged at one end of the annular body towards the valve core assembly, the valve needle extends through the through hole into the valve core body, one end of the guide sleeve is inserted into the first groove, the stop body is arranged in the third groove, and the first stop portion or the second stop portion is arranged in the second groove.

[0017] Further, a pressure balance hole is arranged in the annular body in the circumferential direction, a through hole is arranged on the stop body and communicates with the pressure balance hole, and the through hole communicates with the buffer cavity through the pressure balance hole.

[0018] Further, the stop body and the valve seat body are fixed by welding.

[0019] Compared with the prior art, the electric valve stopper and the electric valve have the beneficial effects that: the stopper only comprises a stop body, a first stop portion and a second stop portion, the overall structure is simple, easy to process, and the processing cost is reduced. Meanwhile, the stop body extends along the first direction, the stop body is provided with the first stop portion and the second stop portion which extend in the first direction and are opposite in direction, since the first stop portion and the second stop portion are arranged at two ends of the stopper respectively, the installation direction of the stopper does not need to be considered when the stopper is installed, the stopper can be prevented from being installed incorrectly, and the assembly efficiency of the electric valve as a whole is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structure schematic view of the electric valve stopper of the utility model embodiment;

[0021] Figure 2 is a structure schematic view of the electric valve of the utility model embodiment;

[0022] Figure 3 is a sectional view of the electric valve of the utility model embodiment;

[0023] Figure 4 is an assembly schematic view of the electric valve stopper of the utility model embodiment;

[0024] Figure 5 is a structure schematic view of the valve seat body of the electric valve of the utility model embodiment.

[0025] In the figure, 1, stop body; 11, first stop portion; 12, second stop portion; 13, positioning hole; 14, through hole; 100, slit; 101, bending portion;

[0026] 2, valve core assembly; 21, main valve seat; 210, buffer cavity; 211, first interface; 212, second interface; 22, valve seat body; 221, annular body; 2211, pressure balance hole; 222, through hole; 223, first groove body; 224, second groove body; 225, third groove body; 23, guide sleeve; 24, valve core body; 241, first connecting hole; 242, second connecting hole;

[0027] 3, valve needle assembly; 31, magnetic rotor assembly; 32, guide nut; 321, limiting portion; 33, valve needle; 34, positioning sleeve; 35, first spring; 36, second spring; 37, shell;

[0028] X, first direction. DETAILED DESCRIPTION

[0029] The specific embodiments of the utility model will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0030] In the description of the utility model, it should be understood that the positions or location relationships indicated by the terms "upper", "lower", "front", "rear", "inner", "outer" and the like in the utility model are based on the position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices and elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0031] In the description of the utility model, it should be understood that the terms "first", "second" and the like are used to describe various information in the utility model, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, "first" information can also be referred to as "second" information without departing from the scope of the utility model, and similarly, "second" information can also be referred to as "first" information.

[0032] As shown in Figures 1 to 5 The utility model preferred embodiment of an electric valve stop piece is for simplifying the overall structure of the stop piece, easy to process, and reducing the processing cost, as shown in Figure 1The axial direction of the positioning hole 13 is defined as the first direction X, and the stopper includes a stopper body 1 extending along the first direction X. When the stopper is installed, the installation direction of the stopper does not need to be considered, thereby improving the assembly efficiency. Therefore, the stopper body 1 is provided with a first stopper part 11 and a second stopper part 12 extending in the first direction X and in opposite directions, and the first stopper part 11 and the second stopper part 12 are both used for limiting the initial position of the valve core assembly 2. In order to facilitate positioning when the stopper body 1 is assembled with other parts of the electric valve, the stopper body 1 is provided with a positioning hole 13 for assembling with the valve core assembly 2 along the first direction X.

[0033] Further, in order to uniformly distribute the first stopper part 11 and the second stopper part 12 at both ends of the stopper body, the first stopper part 11 or the second stopper part 12 can be made to bear the same force when achieving mechanical limiting, thereby improving the stability of the structure of the stopper. In the present embodiment, the number of the first stopper part 11 and the second stopper part 12 is one, and the first stopper part 11 and the second stopper part 12 are centrally symmetrically arranged in the positioning hole 13, the center of symmetry being the center of the positioning hole 13. The first stopper part 11 and the second stopper part 12 have the same structure and the same distance to the positioning hole 13.

[0034] In some embodiments, in order to facilitate the setting of the shape of the stopper body 1, the shape of the stopper body 1 in the cross section perpendicular to the first direction X is circular or polygonal or elliptical. Preferably, in the present embodiment, in order to facilitate the processing of the stopper body 1, the shape of the stopper body 1 in the cross section perpendicular to the first direction X is circular. The shape of the stopper body 1 can be adaptively set according to the structure of the electric valve.

[0035] In some embodiments, in order to facilitate the processing of the first stopper part 11 and the second stopper part 12, the opposite two side walls of the stopper body 1 near the positioning hole 13 are locally extended in the first direction X to form the first stopper part 11 and the second stopper part 12, respectively. The first stopper part 11 and the second stopper part 12 are integrally processed and formed with the stopper body.

[0036] Further, in order to improve the structural strength of the stopper body, the stopper body can be made of metal materials such as stainless steel or sheet metal. Further, in order to save processing materials, the stopper body is provided with a plurality of slits 100 communicating with the positioning hole 13 along the first direction X. The slits 100 locally divide the stopper body to form a bending part 101, and the bending part 101 extends in the first direction X to form the first stopper part 11 and the second stopper part 12. The first stopper part 11 and the second stopper part 12 can be made by bending process.

[0037] In order to adapt to the stopper provided by the utility model, therefore, the utility model also provides an electric valve, which comprises the electric valve stopper of any one of the above and a valve core assembly 2, and further comprises a valve needle assembly 3.

[0038] Specifically, referring to Figures 2 to 4 , the valve core assembly 2 comprises a main valve seat 21, a valve seat body 22, a guide sleeve 23 and a valve core body 24, wherein the main valve seat 21 is internally provided with a buffer cavity 210, a first interface 211 and a second interface 212, the first interface 211 and the second interface 212 are in communication with external pipelines, the valve core body 24 is installed in the buffer cavity 210, a side wall of the valve core body 24 is provided with a first connecting hole 241 in communication with the buffer cavity 210 and the first interface 211, and a bottom of the valve core body 24 is provided with a second connecting hole 242 in communication with the second interface 212; one end of the valve seat body 22 is inserted into the main valve seat 21, the other end extends out of the main valve seat 21 and is fixedly connected with the stopper at the top, one end of the guide sleeve 23 penetrates through the positioning hole 13 and is connected with the valve seat body 22, and the other end extends above the valve seat body 22, and the guide sleeve 23 is coaxially arranged with the positioning hole 13. Before the installation position of the stopper and the valve seat body 22 is determined, the stopper can rotate relative to the valve seat body 22, and after being adjusted to a suitable position, the stopper body 1 and the valve seat body 22 are fixed by welding, thereby improving the stability of the position of the stopper after installation.

[0039] When the valve needle assembly 3 and the valve core assembly 2 are assembled, after the valve needle assembly 3 is assembled to a suitable position, the position of the first stopper 11 or the second stopper 12 relative to the guide sleeve 23 and the valve seat body 22 is adjusted by rotating the stopper, that is, the relative position of the first stopper 11 or the second stopper 12 and the valve needle assembly 3 is adjusted, the first stopper 11 or the second stopper 12 plays a role in positioning the initial position of the valve needle 33 unit, and it is not necessary to calibrate the relative positions of the height of the thread starting point position, the angle of the thread starting point and the stopper protrusion before assembling the valve needle assembly 3, thereby reducing the assembly difficulty, reducing the machining precision of parts and thus reducing the manufacturing cost.

[0040] Specifically, the valve needle assembly 3 is threadedly connected with the guide sleeve 23 and extends into the valve core body 24, the valve needle assembly 3 can rotate around the axis of the positioning hole 13 and synchronously reciprocate along the first direction X, so as to make the first connecting hole 241 and the second connecting hole 242 communicate or disconnect, thereby realizing the on-off function of the electric valve, the valve needle assembly 3 is provided with a limiting portion 321 abutting against the stopper, and when the stopper abuts against the limiting portion 321, the valve needle assembly 3 is in the initial position.

[0041] Further, the valve needle assembly 3 comprises a magnetic rotor assembly 31, a guide nut 32, a valve needle 33, a positioning sleeve 34, a first spring 35, a second spring 36 and a shell 37, the guide nut 32 is coaxially and fixedly connected in the magnetic rotor assembly 31, and the bottom of the guide nut 32 is provided with a limiting portion 321 abutting against the first stop portion 11 or the second stop portion 12. The one end of the guide sleeve 23 extending to the guide nut 32 away from the valve seat body 22 is rotationally connected with the guide nut 32, the valve needle 33 is arranged in the guide sleeve 23 and the bottom of the valve needle 33 extends into the valve core body 24, the first spring 35 is sleeved outside the valve needle 33, one end of the first spring 35 abuts against the valve needle 33, and the other end of the first spring 35 abuts against the guide nut 32, and the first spring 35 has a tendency to push the valve needle 33 downward. Since the guide sleeve 23 is threadedly connected with the guide nut 32, when it is needed to disconnect the first interface 211 from the second interface 212, the magnetic rotor assembly 31 and the guide nut 32 rotate synchronously and can descend along the first direction X, at this time, the first spring 35 is compressed, the valve needle 33 is pushed downward to seal the second connecting hole 242, and at this time, the first interface 211 is disconnected from the second interface 212. Conversely, the first interface 211 is disconnected from the second interface 212.

[0042] In order to keep the valve needle 33 stable during the lifting process, the top of the valve needle 33 is sleeved with the positioning sleeve 34, the bottom of the positioning sleeve 34 abuts against the guide nut 32, the second spring 36 is sleeved outside the positioning sleeve 34, one end of the second spring 36 abuts against the guide nut 32, and the other end of the second spring 36 abuts against the shell 37, the shell 37 covers the magnetic rotor assembly 31, and the bottom of the shell 37 is fixedly connected with the valve seat body.

[0043] Further, in some embodiments, in order to facilitate the design of the valve seat body 22 and facilitate the positioning when the valve core assembly 2 and the valve needle assembly 3 are installed, the valve seat body 22 comprises an annular body 221, a through hole 222 is formed in the middle of the annular body 221 along the first direction X, and a first groove 223, a second groove 224 and a third groove 225 coaxial with the through hole 222 are sequentially arranged at the one end of the annular body 221 facing the valve core assembly 2. Among them, the valve needle 33 extends through the through hole 222 into the valve core body, one end of the guide sleeve 23 is inserted into the first groove 223, the stop body 1 is arranged in the third groove 225, the first stop portion 11 or the second stop portion 12 is located in the second groove 224, and interference with the valve seat body 22 during installation is avoided.

[0044] Further, in some embodiments, in order to keep the pressure balanced at each place inside the electric valve, the annular body 221 is circumferentially provided with a pressure balance hole 2211, the stop body is provided with a through hole 14 in communication with the pressure balance hole 2211, and the through hole 14 is in communication with the buffer cavity 210 through the pressure balance hole 2211. Since each assembly is in communication, it is beneficial to keep the internal pressure of the electric valve balanced.

[0045] In summary, the utility model discloses an electric valve stop piece and electric valve, and the stop piece only includes stop body 1, first stop part 11 and second stop part 12, and the whole structure is simple, and it is easy to process, and reduces processing cost. Meanwhile, stop body 1 extends along the first direction X, stop body 1 is equipped with the first stop part 11 and the second stop part 12 in the first direction X and opposite direction, because being equipped with the first stop part 11 and the second stop part 12 respectively in the both ends of stop piece, when installing stop piece, need not consider the installation direction of stop piece, can avoid stop piece when installing error, improve the assembly efficiency of electric valve whole.

[0046] The above only is the preferred implementation of the utility model, should point out, for the ordinary skill of the prior art of this technology, on the premise of not departing from the technical principle of the utility model, can make several improvements and replacement, these improvements and replacement also should be regarded as the protection range of the utility model.

Claims

1. An electrically powered valve stop, characterized by: The stop body extends along a first direction, and is provided with a first stop portion and a second stop portion extending in the first direction and in opposite directions, the first stop portion and the second stop portion are used for limiting the initial position of the valve core assembly, and the stop body is provided with a positioning hole used for assembling the valve core assembly along the first direction.

2. The motorized valve stop of claim 1, wherein: The first stop portion and the second stop portion are arranged in central symmetry.

3. The motorized valve stop of claim 1, wherein: The shape of the stop body in the cross section perpendicular to the first direction is circular or polygonal or elliptical.

4. The motorized valve stop of claim 1, wherein: The opposite two side walls of the stop body near the positioning hole are partially extended in the first direction to form the first stop portion and the second stop portion, respectively.

5. The motorized valve stop of claim 4, wherein: The stop body is provided with a plurality of slits along the first direction, the slits are in communication with the positioning hole, the slits partially divide the stop body to form a bending portion, and the bending portion is bent along the first direction to form the first stop portion and the second stop portion.

6. An electrically operated valve comprising the electrically operated valve stop of any one of claims 1-5 and the valve core assembly, wherein: Further comprising a valve needle assembly; The valve core assembly comprises a main valve seat, a valve seat body, a guide sleeve and a valve core body, the main valve seat is provided with a buffer cavity, a first interface and a second interface, the valve core body is installed in the buffer cavity, a side wall of the valve core body is provided with a first connecting hole in communication with the buffer cavity and the first interface, and a bottom of the valve core body is provided with a second connecting hole in communication with the second interface; one end of the valve seat body is inserted into the main valve seat, the other end extends out of the main valve seat and is fixedly connected with the stopper at the top, one end of the guide sleeve penetrates through the positioning hole and is connected with the valve seat body, and the other end extends above the valve seat body, and the guide sleeve is coaxially arranged with the positioning hole; The valve needle assembly is threadedly connected with the guide sleeve and extends into the valve core body, the valve needle assembly rotates around the axis of the positioning hole and reciprocates along the first direction to make the first connecting hole and the second connecting hole in communication or disconnected, the valve needle assembly is provided with a limiting portion abutting against the first stop portion or the second stop portion, the stop portion abuts against the limiting portion, and the valve needle assembly is in the initial position.

7. The motorized valve of claim 6, wherein: The valve needle assembly comprises a magnetic rotor assembly, a guide nut, a valve needle, a positioning sleeve, a first spring, a second spring and a shell, the magnetic rotor assembly is coaxially and fixedly connected with the guide nut, a bottom of the guide nut is provided with the limiting portion abutting against the first stop portion or the second stop portion, one end of the guide sleeve extending away from the valve seat body extends into the guide nut and is rotationally connected with the guide nut, the valve needle penetrates through the guide sleeve and extends into the valve core body, the first spring is sleeved outside the valve needle, one end of the first spring abuts against the valve needle and the other end abuts against the guide nut, and the first spring has a tendency to push the valve needle downward. The top of the valve needle is sleeved with the positioning sleeve, the bottom of the positioning sleeve is in abutment with the guide nut, the second spring is sleeved outside the positioning sleeve, one end of the second spring is in abutment with the guide nut, the other end of the second spring is in abutment with the shell, the second spring has a movement tendency of pushing the guide nut away from the shell; The shell cover is arranged outside the magnetic rotor assembly, and the bottom is fixedly connected with the valve seat body.

8. The motorized valve of claim 7, wherein: The valve seat body comprises an annular body, a through hole is formed in the middle of the annular body along the first direction, one end of the annular body towards the valve core assembly is sequentially provided with a first groove, a second groove and a third groove coaxial with the through hole, the valve needle extends through the through hole into the valve core body, one end of the guide sleeve is inserted into the first groove, the stop body is arranged in the third groove, and the first stop portion or the second stop portion is located in the second groove.

9. The motorized valve of claim 8, wherein: A pressure balance hole is formed in the circumference of the annular body, a through hole is formed in the stop body and communicates with the pressure balance hole, and the through hole communicates with the buffer cavity through the pressure balance hole.

10. The motorized valve of claim 6, wherein: The stop body and the valve seat body are fixed by welding.

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