CN216112427U

CN216112427U - Solenoid valve, pilot valve and four-way valve

Info

Publication number: CN216112427U
Application number: CN202122739011.XU
Authority: CN
Inventors: 金华海; 田鹏
Original assignee: Zhejiang Dunan Machinery Co Ltd
Current assignee: Zhejiang Dunan Machinery Co Ltd
Priority date: 2021-11-09
Filing date: 2021-11-09
Publication date: 2022-03-22
Anticipated expiration: 2031-11-09

Abstract

The utility model discloses a solenoid valve, a pilot valve and a four-way valve, belonging to the technical field of valve bodies, wherein the solenoid valve comprises: an electromagnetic coil having a through hole formed therein; the valve body is provided with a mounting assembly which is inserted in the through hole; the mounting is located solenoid and keeps away from the one end of valve body, including joint portion and backstop portion, joint portion and installation component joint, backstop portion and solenoid butt, joint portion and installation component joint through the mounting, it is spacing to realize solenoid installation and axial on the valve body, prevent that solenoid from deviating from the valve body, and joint mode firmness is high, it is little influenced by external environment such as vibration, thereby reliability when having guaranteed solenoid and valve body use, the mounting that the joint used is independent of outside valve body and solenoid, need not consider its and solenoid's connection structure in addition and the influence of being connected the firmness, the design is simplified, and the processing is convenient for, and low cost has guaranteed the intensity of each part.

Description

Solenoid valve, pilot valve and four-way valve

Technical Field

The utility model relates to the technical field of valve bodies, in particular to a solenoid valve, a pilot valve and a four-way valve.

Background

The piston type four-way valve (short for four-way valve) mainly includes main valve and pilot valve, the pilot valve is equipped with coil, its working principle is that it utilizes the on-off electricity of coil set on the pilot valve to change the flow direction of fluid in the pilot valve, and further utilizes the connecting pipeline of pilot valve and main valve to implement switching of flow path in the main valve and implement switching of refrigerating or heating state of refrigerating system, generally, the pilot valve adopts domestic electromagnetic four-way reversing valve, and its equipped electromagnetic coil is also domestic coil, as shown in figure 1, the domestic coil includes coil component 11a and magnetizer 12a held in coil component 11a, in order to implement installation of electromagnetic coil on the pilot valve, the pilot valve is equipped with sleeve 2a inserted with electromagnetic coil, and the sleeve 2a is equipped with static iron core, and on the static iron core is equipped with threaded hole 21a, and on the coil and at the position correspondent to threaded hole 21a is equipped with through hole 13a, the screw 3a is inserted through the through hole 13a and then screwed and fixed with the screw hole 21a, thereby realizing the installation of the household coil and the pilot valve.

Domestic type coil, generally the installation is used in the casing, consequently lower to its waterproof and requirement of preventing impurity, and the piston four-way valve that large-scale commercial unit used does not have shell frame construction protection, and waterproof and the requirement of preventing impurity ability of coil are higher, consequently need use the commercial type solenoid that barrier propterty is better, and commercial type solenoid's volume is great, the unable installation demand that satisfies of the screw installation fixed knot structure of above-mentioned domestic type coil.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to disclose a solenoid valve to at least partially solve the above mentioned problems.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a solenoid valve, comprising:

an electromagnetic coil having a through hole formed therein;

the valve body is provided with a mounting assembly, and the mounting assembly is inserted into the through hole;

the mounting is located solenoid keeps away from the one end of valve body, including joint portion and backstop portion, joint portion with the installation component joint, backstop portion with the solenoid butt.

The beneficial effect of this scheme of adoption:

through the joint portion and the installation component joint of mounting in this scheme, realize that solenoid's installation and axial on the valve body are spacing, prevent that solenoid from deviating from the valve body, and joint mode firmness is high, and it is little influenced by external environment such as vibration to reliability when having guaranteed solenoid and valve body and using.

Simultaneously, through control joint position, make the backstop portion and the solenoid butt of joint back mounting, with solenoid stable card holding between mounting and valve body, prevent that solenoid from scurrying in the axial, also increased solenoid circumferential direction's the degree of difficulty, improve its overall stability after the installation.

When the solenoid valve in this scheme is assembled, insert the installation component in solenoid's through-hole, block again the mounting can, easy operation, the mounting that the joint used need not consider in addition its with solenoid's connection structure and the influence of firm in connection degree outside valve body and solenoid, the design is simplified, the processing of being convenient for, reduce cost has guaranteed the intensity of each part.

Clamping portion and backstop portion all set up on the mounting, and the integrative multi-purpose of mounting simplifies the electromagnetism valve part, saves assembly space, reduces material cost.

As preferred, the mounting still includes fixed cover, joint portion establishes in fixed cover, the installation component insert in fixed cover and with joint portion joint, fixed cover is close to solenoid's terminal surface forms backstop portion, fixed cover is integrative multi-purpose, need not establish backstop portion on the mounting in addition, simplifies the structure, reduces material and processing cost, and through the terminal surface butt valve body of fixed cover, makes fixed cover and valve body restrict each other, prevents that it from rocking relatively, has further improved the stability of each part after the assembly, has also reduced the possibility that joint portion breaks away from the installation component. The mounting assembly is inserted into the fixing sleeve, and the fixing sleeve plays a role in protecting the insertion end of the mounting assembly, so that the mounting assembly is prevented from being damaged by external force, the service life of the mounting assembly is prolonged, and the replacement cost is reduced.

As preferred, the mounting with be equipped with the arch on one of the installation component, be equipped with the draw-in groove on another, protruding card is gone into make in the draw-in groove the mounting with the installation component joint, arch and draw-in groove, simple structure, easily processing, during the installation, press down the mounting, make protruding card go into in the recess can, the operation of being convenient for, stability is high behind the joint, and the non-great axial external force is difficult for breaking away, has guaranteed the joint firmness.

Preferably, a circumferential limiting structure is arranged between the electromagnetic coil and the fixing piece to limit the rotation of the fixing piece and the rotation of the fixing piece, so that the clamping and abutting stability is further improved, and meanwhile, the fixing piece is convenient to be matched with other electromagnetic valve upper parts.

Preferably, the circumferential limiting structure comprises a projection arranged on one of the electromagnetic coil and the fixing piece, and a groove for the projection to be clamped is arranged on the other one of the electromagnetic coil and the fixing piece. The side wall of the lug is stopped by the side wall of the groove to limit the rotation of the fixing piece relative to the electromagnetic coil, and the lug and the groove are simple in structure and easy to process.

Preferably, the mounting assembly comprises a mounting sleeve, a static iron core and a fixing pin, the mounting sleeve is arranged on the valve body, the static iron core is fixed in the mounting sleeve, the static iron core is connected with the fixing piece through the fixing pin, a commercial electromagnetic coil is large, the length of the common mounting sleeve on the valve body is fixed and is not enough to penetrate through the electromagnetic coil to be clamped with the fixing piece, therefore, the fixed pin is additionally connected on the static iron core of the installation sleeve and is extended to a proper length so as to realize the clamping and abutting effect, the common mounting sleeve and the static iron core are matched by the fixing pin without redesigning, processing and replacing the existing mounting sleeve and the static iron core, thereby saving the cost, and the fixed pin of different length is changed to the accessible, is used for the mounting sleeve pipe of different models with this mounting structure on, and the flexibility ratio is high, improves this mounting structure's commonality.

Preferably, the mounting assembly comprises a mounting sleeve and a static iron core, the static iron core is fixed in the mounting sleeve, the mounting sleeve is clamped with the fixing piece, the mounting sleeve is directly clamped with the fixing piece, an intermediate connecting piece is not required to be additionally arranged, components are simplified, and assembling steps are reduced.

Preferably, the fixing piece is made of elastic materials, so that the fixing piece is deformed to a certain extent when being installed, the tightness and firmness of clamping and abutting are improved, and a good installation effect is guaranteed.

Preferably, the electromagnetic coil comprises a coil frame and an outer shell, the coil frame is embedded in the outer shell, the outer shell is of an integral plastic package structure, the through hole penetrates through the coil frame and the outer shell, the electromagnetic valve further comprises a fastening cover, the fastening cover covers the outside of the fixing piece and is in threaded connection with the fixing piece, and the fastening cover is pressed against the outer shell through screwing the fastening cover to form sealing.

The shell adopts whole plastic envelope structure, and the plastic envelope structure has elastic property, can produce elastic deformation during the pressurized, therefore the fastening lid compresses tightly when stating the shell, can form sealedly in through-hole department, thereby form omnidirectional sealed and protection to solenoid, reach fine insulating and waterproof dustproof impurity prevention effect, use under the no shell frame condition of suitable large-scale commercial unit, and the fastening lid spiral shell moves on the mounting, when realizing the mounting of fastening lid, still have the function of compressing tightly, further extrude solenoid, improve the stability after the solenoid installation.

Preferably, a sealing member is disposed between the fastening cover and the housing, and the sealing effect between the fastening cover and the housing is enhanced by the sealing member.

Preferably, the fastening cover is made of an elastic non-metallic material to be fitted to the housing, and has an insulating property while providing a better sealing effect when in contact therewith.

The other technical scheme adopted by the utility model is as follows:

the electromagnetic valve drives the pilot valve core to move in the pilot valve body.

Preferably, the solenoid coil has a rectangular cross-section along the radial direction of the mounting assembly, and the axis of the mounting assembly is aligned with the axis of the pilot valve bodyThe minimum transverse distance is D, and the minimum distance between the central line of the through hole and the periphery of the electromagnetic coil is D_minThe maximum distance between the central line of the through hole and the periphery of the electromagnetic coil is D_maxD, D_minAnd D_maxD is required to satisfy_min＜d＜D_max。

By setting D_minD to leave enough space between the installation component and the pilot valve body to ensure that the electromagnetic coil is smoothly sleeved on the installation component, and D is set to be less than D_maxTo limit the angle of rotation of the solenoid coil on the mounting assembly.

The other technical scheme adopted by the utility model is as follows:

a four-way valve comprises a main valve and the pilot valve in any scheme, wherein the main valve comprises a main valve body and a main valve core arranged in the main valve body, and the pilot valve drives the main valve core to move in the main valve body.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

Drawings

The utility model is further described with the following drawings:

fig. 1 is an exploded view of a conventional household type coil and bushing assembly.

FIG. 2 is a schematic diagram of a high capacity piston type four-way valve according to the present invention.

FIG. 3 is a schematic view of a pilot valve of the present invention.

FIG. 4 is a partial cross-sectional view of the pilot valve of the present invention.

FIG. 5 is a partially exploded view of the solenoid valve of the present invention.

Fig. 6 is a schematic perspective view of the electromagnetic coil according to the present invention.

Fig. 7 is a perspective view of the fixing pin of the present invention.

Fig. 8 is a schematic perspective view of the fixing member of the present invention.

Fig. 9 is a cross-sectional view of the fastener of the present invention.

Fig. 10 is a cross-sectional view of a fastening cover of the present invention.

Reference numerals:

11a, a coil component; 12a, a magnetizer; 2a, a sleeve; 21a, a threaded hole; 13a, perforating; 3a, a screw;

001. an electromagnetic valve;

100. a valve body; 110. installing a sleeve;

200. an electromagnetic coil; 210. a coil bobbin; 211. an upper end surface; 212. perforating; 220. a housing; 221. a top wall; 222. an upper opening; 223. a bump;

300. a fixing member; 310. fixing a sleeve; 311. a convex tip; 320. a second external thread; 330. a groove;

400. a fixing pin; 410. a threaded end; 411. a first external thread; 420. a clamping end; 421. a card slot; 422. an operation slot; 500. a fastening cover; 510. an annular accommodating groove; 520. an internal thread;

600. an annular seal ring;

700. a stationary iron core; 710. a threaded hole;

002. a pilot valve;

003. a large capacity main valve.

Detailed Description

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

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," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in fig. 4 to facilitate the description of the utility model and to simplify the description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered as limiting the utility model.

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, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In this embodiment, when referring to the axial direction, the circumferential direction and the radial direction, the default is along the central axis direction, the circumferential direction and the radial direction of the installation sleeve, which will not be described in detail below.

The solenoid valve 001 of the present invention will be described in further detail with reference to the accompanying drawings and embodiments:

the present invention will be described below by taking a large capacity piston type four-way valve composed of a triple four-way valve as an example, but it will be understood by those skilled in the art that the present invention can also be applied to a small capacity piston type four-way valve in which the solenoid valve 001 is used as a driving member, a piston type four-way valve composed of a double four-way valve, and other valves.

A high-capacity piston type four-way valve is used in heat exchange equipment such as an air conditioner and the like to change the flowing direction of a medium.

Referring to fig. 2, the high capacity piston type four-way valve includes a high capacity main valve 003 and a pilot valve 002, the high capacity main valve 003 includes a main valve body and a main valve spool disposed in the main valve body, four valve ports are formed in the main valve body along the circumferential direction, and the main valve spool is driven by the pilot valve 002 to move in the main valve body to realize the direction change between the valve ports.

Referring to fig. 2 to 4, the pilot valve 002 includes a pilot valve body, a solenoid valve 001, and a pilot valve spool disposed in the pilot valve body, wherein the solenoid valve 001 drives the pilot valve spool to move in the pilot valve body.

The pilot valve 002 and the solenoid valve 001 are preferably four-way valves, and the step-by-step driving principle of the multiple four-way valves is the prior art and is not described in detail herein.

The large-capacity piston type four-way valve is mainly used for large-scale commercial units, so that a commercial electromagnetic coil 200 used by the electromagnetic valve 001 is different from a household coil of a household electromagnetic valve, the size is larger, the installation and fixation of the large-capacity piston type four-way valve on the valve body 100 cannot be realized through screws, and the requirements on waterproof and impurity-proof capacities are higher.

In order to solve the above technical problem, referring to fig. 2 to 5, according to an embodiment of the present invention, a solenoid valve 001 includes a valve body 100, a solenoid coil 200, and a fixing member 300, a through hole is formed on the solenoid coil 200, a mounting assembly is arranged on the valve body 100, the mounting assembly is inserted into the through hole, the fixing member 300 is located at one end of the solenoid coil 200 far from the valve body 100, and includes a clamping portion and a stopper portion, the clamping portion is clamped with the mounting assembly, and the stopper portion is abutted against the solenoid coil 200.

In this embodiment, the clamping portion of the fixing member 300 is clamped with the mounting assembly, so that the mounting and axial limiting of the electromagnetic coil 200 on the valve body 100 are realized, the electromagnetic coil 200 is prevented from being separated from the valve body 100, and the clamping manner is high in firmness and is less affected by external environments such as vibration, so that the reliability of the electromagnetic coil 200 and the valve body 100 in use is ensured.

Meanwhile, by controlling the clamping position, the stopping portion of the clamping rear fixing member 300 is abutted to the electromagnetic coil 200, and the electromagnetic coil 200 is stably clamped between the fixing member 300 and the valve body 100, so that the electromagnetic coil 200 is prevented from moving in the axial direction, the difficulty of circumferential rotation of the electromagnetic coil 200 is increased, and the overall stability of the electromagnetic coil after installation is improved.

When the solenoid valve 001 in the embodiment is assembled, the mounting assembly is inserted into the through hole of the solenoid coil 200, and then the fixing member 300 is clamped, so that the operation is simple, the fixing member 300 used for clamping is independent of the valve body 100 and the solenoid coil 200, the influence of the connection structure and the connection firmness of the fixing member and the solenoid coil 200 is not needed to be considered, the design is simplified, the processing is convenient, the cost is reduced, and the strength of each part is ensured.

Joint portion and backstop portion all set up on mounting 300, and mounting 300 is integrative multi-purpose, retrencies solenoid valve 001 parts, saves assembly space, reduces material cost.

Referring to fig. 6, the electromagnetic coil 200 includes a bobbin 210 and a case 220, the bobbin 210 being embedded in the case 220, and the coil being mounted between the bobbin 210 and the case 220. The housing 220 is of an integral plastic package structure, so that the electromagnetic coil 200 has good insulating and protecting properties. The through hole penetrates the bobbin 210 and the housing 220, the bobbin 210 includes an upper end surface 211 and a lower end surface (not shown in the figure due to the shielding), and the housing 220 includes a top wall 221 covering the upper end surface 211 and a bottom wall covering the lower end surface (not shown in the figure due to the shielding).

The through hole of the electromagnetic coil 200 includes a through hole 212 formed in the bobbin 210 and extending from the upper end surface 211 to the lower end surface thereof, and an upper opening 222 and a lower opening (not shown in the drawings due to shielding) are formed in the top wall 221 and the bottom wall of the housing 220 at positions corresponding to the through hole 212, respectively. In order not to interfere with the insertion of the mounting assembly, the size of the lower opening is not smaller than the size of the through hole 212 and the size of the upper opening 222 is not smaller than the size of the through hole 212. preferably, the size of the upper opening 222 is larger than the size of the through hole 212 to form a step between the top wall 221 and the upper end surface 211.

The fixing member 300 abuts on the upper end surface 211 of the bobbin 210 to thereby at least partially accommodate the fixing member 300 in the electromagnetic coil 200, and preferably, the fixing member 300 is disposed at a lower portion in the electromagnetic coil 200 and at an upper portion exposed outside the electromagnetic coil 200 to be assembled with other components.

Specifically, referring to fig. 4, 8 and 9, the fixing member 300 includes a fixing sleeve 310, the fixing sleeve 310 preferably includes a fixing cap having a top wall, a clamping portion is disposed in the fixing sleeve 310, the mounting assembly is inserted into the fixing sleeve 310 and clamped with the clamping portion, and the fixing sleeve 310 forms the above-mentioned stopper portion near the end surface of the electromagnetic coil 200, i.e., the lower end surface of the fixing sleeve 310. During clamping, the upper end surface 211 of the coil framework 210 stops the lower end surface of the fixing sleeve 310, and when the fixing sleeve 310 compresses the electromagnetic coil 200, the coil framework 210 also limits the pressing stroke of the fixing piece 300, so that excessive pressing is avoided, and the clamping structure is prevented from being damaged.

The fixing sleeve 310 is integrated and multipurpose, and a stopping part is not required to be additionally arranged on the fixing member 300, so that the structure is simplified, and the material and processing cost is reduced. And the terminal surface through fixed cover 310 supports valve body 100, makes fixed cover 310 and valve body 100 restrict each other, prevents it and rocks relatively, has further improved the stability of each part after the assembly, has also reduced the possibility that joint portion breaks away from the installation component. Meanwhile, the fixing sleeve 310 is regular in shape and flat in surface, interference with other parts is avoided, and damage to the parts is avoided.

Of course, in other embodiments, the stopping portion may be further disposed on the fixing member 300, for example, a protruding ring may be disposed on the outer circumference of the fixing sleeve 310, and the protruding ring forms the stopping portion. During the installation, make fixed cover 310 part insert the through-hole in, preferably fixed cover 310 outer wall and through-hole pore wall clearance fit to make the through-hole pore wall play better radial backstop effect to mounting 300, reduce rocking when mounting 300 receives the side force, further improved the stability after mounting of mounting 300, guarantee joint and butt effect.

In order to simplify the structure and facilitate the processing, as shown in fig. 4, the engaging structure in this embodiment is preferably a protruding engaging groove 421. Specifically, be equipped with the arch on the fixed cover 310 inner wall, be equipped with draw-in groove 421 on the installation component outer wall, during the installation, press down mounting 300, make protruding card go into can make mounting 300 and installation component joint in the recess 330, the operation of being convenient for, stability is high behind the joint, and the difficult throw-off has guaranteed the joint firmness to the not great axial external force. The mounting component is inserted into the fixing sleeve 310, and the fixing sleeve 310 plays a role in protecting the insertion end of the mounting component, so that the mounting component is prevented from being damaged by external force, the service life of the mounting component is prolonged, and the replacement cost is reduced. Meanwhile, the clamping position can be set, so that the clamping position is relatively close to the valve body 100, the length of the mounting assembly can be shortened, and the material cost is saved.

The protrusions are circumferentially disposed along the inner wall of the harness 310, preferably as continuously extending annular protrusions. As shown in fig. 8 and 9, the protrusion preferably has a tip 311, and compared with the arc-shaped protrusion, the tip 311 is not only convenient for mounting the card but also has a better stopping effect and is not easy to be removed from the card slot 421. Preferably, the protruding tip 311 is in interference fit with the slot wall of the slot 421 after being clamped into the slot 421, so as to improve the clamping firmness.

Of course, a plurality of dot-shaped or block-shaped protrusions arranged at intervals may be provided.

The fixed part 300 preferably has certain elastic non-metallic material in this embodiment, such as plastics, so that the protrusion also has certain elasticity, and for elastic protrusion, can extrude the card to go into the draw-in groove 421, and resume deformation in the draw-in groove 421, be full of the draw-in groove 421, guarantee the firmness after the joint, and form sealedly between fixed part 300 and the installation component, and elastic protrusion has the cushioning property, reduces wearing and tearing between the parts, prolongs the life of the parts. Meanwhile, the fixing member 300 has elasticity, is higher in tightness with the fitting of the mounting assembly, is better in stability after assembly, and promotes the effect of extrusion abutment with the upper end surface 211 of the bobbin 210, and forms sealing at the abutment. Meanwhile, the fixing member 300 is in direct contact with the coil bobbin 210 and the mounting assembly, and the non-metal material also has insulation property, so that the safety in use is improved.

Preferably, a raised catch 421 engagement structure can be placed in the through hole to further shorten the length of the mounting assembly.

Of course, in other embodiments, the inner wall of the fixing sleeve 310 may be provided with a groove 330, and the outer wall of the mounting assembly may be provided with a protrusion.

Of course, in other embodiments, other engaging structures may be used, such as a snap-fit structure 421 disposed axially between the lower end of the fixing sleeve 310 and the upper end of the mounting assembly.

In order to limit the rotation of the fixing member 300 relative to the electromagnetic coil 200, a circumferential limiting structure is provided between the electromagnetic coil 200 and the fixing member 300, and specifically, as shown in fig. 5 and 6, a projection 223 is provided at a step portion, that is, the projection 223 extends inward from the inner circumference of the upper opening 222 of the housing 220.

The fixing member 300 is provided with a groove 330 matched with the projection 223, the groove 330 is formed by inwards opening the side wall of the fixing member 300, the projection 223 is clamped in the groove 330 to form a circumferential limiting structure, the projection 223 is stopped by the side wall of the groove 330 to limit the rotation of the fixing member 300 relative to the electromagnetic coil 200, and the projection 223 and the groove 330 are simple in structure and easy to process.

At least one projection 223, preferably two or more projections 223 are provided at the step portion, and the two or more projections 223 are uniformly distributed on the step portion in the circumferential direction.

The stability of joint and butt is further improved through circumference limit structure, simultaneously, the cooperation of the mounting 300 of also being convenient for and other solenoid valve 001 upper parts.

The projection 223 in this embodiment is formed by extending radially inward from the inner wall of the upper opening 222 of the top wall 221 of the housing 220, and the projection 223 is integrally formed with the inner wall of the upper opening 222.

Of course, in other embodiments, the projection 223 may also be formed by extending upward from the upper end surface 211 of the bobbin 210.

Of course, in other embodiments, other circumferential stops may be used, such as a D-profile engagement.

In order to save the improvement cost, as shown in fig. 4 and 5, the mounting assembly in this embodiment includes a mounting sleeve 110, a stationary core 70 and a fixing pin 400, the mounting sleeve 110 is disposed on the valve body 100, the stationary core 700 is fixed in the mounting sleeve 110, the fixing pin 400 is connected to a side of the mounting sleeve 110 away from the valve body 100, and the fixing member 300 is connected to an end of the fixing pin 400 away from the mounting sleeve 110.

Through connect fixed pin 400 in addition on quiet iron core 700, prolong installation sleeve 110 to suitable length, in order to cooperate with mounting 300, realize foretell joint and butt effect, installation sleeve 110 and quiet iron core 700 that match commonly used through fixed pin 400, need not redesign current installation sleeve 110 and quiet iron core 700, processing and change, save the cost, and the fixed pin 400 of different length is changed to the accessible, be used for this mounting structure on the installation sleeve 110 of different models, the flexibility is high, improve this mounting structure's commonality.

As shown in fig. 4 and 7, the fixing pin 400 specifically includes a threaded end 410 in threaded connection with the stationary core 700 and a clamping end 420 in clamping connection with the fixing member 300, that is, the threaded end 410 is at the end of the fixing pin 400 close to the installation sleeve unit, and the clamping end 420 is at the end of the fixing pin 400 far from the installation sleeve unit.

The end of the static iron core 700 far from the valve body 100 commonly used in the existing market is provided with a threaded hole 710 matched with a screw, and in the embodiment, the threaded end 410 is provided with a first external thread 411 matched with the threaded hole 710, so that the threaded end 410 of the fixing pin 400 can be well matched with the existing mounting sleeve 110 for use, the static iron core 700 does not need to be specially manufactured, and the market is better adapted. In the clamping structure for mounting the electromagnetic coil on the valve body in the embodiment, the clamping end 420 is arranged on the fixing pin 400, the clamping portion is arranged on the fixing piece 300, when the clamping structure is damaged, only the fixing pin 400 or the fixing piece 300 needs to be replaced, the electromagnetic coil 200 serving as the main body, the valve body 100, the mounting sleeve 110 and the static iron core welded in the mounting sleeve 100 are not affected, and replacement difficulty and cost are reduced.

The quiet iron core 700 among the installation sleeve 110 adopts soft magnetic stainless steel material, and in order not to influence the magnetic force of quiet iron core 700, fixed pin 400 also is the magnetism fixed pin, preferred soft magnetic stainless steel fixed pin, and the installation component produces sufficient magnetic attraction and moves the iron core when solenoid valve 001 circular telegram, realizes the switch of solenoid valve 001. The fixing pin is made of soft magnetic stainless steel materials, and connection strength of the fixing pin as a connecting piece and high magnetic conductivity of the fixing pin as an iron core can be guaranteed.

Preferably, in order to increase the versatility of the fixing pin 400 to better match different lengths of the mounting sleeve 110 or to form different lengths of the mounting assembly, the fixing pin 400 may be designed as a telescopic fixing pin 400 with adjustable length.

Preferably, in order to facilitate the installation of the fixing pin 400 on the stationary core 700, an end of the fixing pin 400 remote from the stationary core 700 is provided with an operation slot 422, so that a worker can insert a screwdriver into the operation slot 422 to screw the threaded end 410 of the fixing pin 400 into the threaded hole 710 of the stationary core 700.

Of course, in other embodiments, the length of the installation sleeve 110 may be increased, and the clamping end clamped with the fixing member 300 is formed on the installation sleeve 110 as an installation assembly, without additionally arranging an intermediate connecting member, so as to simplify components and reduce assembly steps.

In order to form a full-directional sealing and protection of the solenoid 200, as shown in fig. 2, 4 and 5, the solenoid valve 001 further includes a fastening cap 500, the fastening cap 500 covers the fixing member 300 and is screw-coupled to the fixing member 300, and the fastening cap 500 is pressed against the housing 220 to form a seal by screwing the fastening cap 500.

Specifically, as shown in fig. 10, the fastening cap 500 is provided at the inner circumference thereof with an internal thread 520, and the fixing sleeve 310 of the fixing member 300 is provided at the outer circumference thereof with a second external thread 320 engaged with the internal thread 520.

At this time, the lower end surface of the second external thread 320 forms a convex ring extending outward along the radial direction on the periphery of the fixing sleeve 310, that is, the stop portion is additionally arranged on the fixing member 300, the second external thread 320 is integrated for multiple purposes, and the convex ring is not required to be additionally arranged on the fixing member 300, so that the structure of the fixing member 300 is further simplified, the structure is optimized, the processing technology is simplified, the cost is saved, and the efficiency is improved.

A circumferential stopper structure is provided between the electromagnetic coil 200 and the fixing member 300 to prevent the fixing member 300 from rotating on the electromagnetic coil 200, and also to screw the fastening cap 500, so as to prevent the fixing member 300 from rotating with the fastening cap 500 when the fastening cap 500 is screwed.

The preferred radial dimension of fastening lid 500 is greater than the size of the upper shed 222 of shell 220, fastening lid 500 covers the upper shed 222 promptly, shell 220 is the plastic envelope structure, better deformability has, when fastening lid 500 compresses tightly downwards and shell 220 butt, form sealedly in through-hole edge department, to built in coil skeleton 210 in shell 220 and around establishing the coil on coil skeleton 210 fine waterproof dustproof anti-impurity effect, use under the no shell 220 frame condition of large-scale commercial unit, and fastening lid 500 is spiral shell on mounting 300, when realizing the installation of fastening lid 500, still have the function of compressing tightly, further extrude solenoid 200, improve the stability after the solenoid 200 installation.

The fastening cover 500 is preferably made of a non-metal material having elasticity, such as plastic, to further enhance the sealing effect with the housing 220 and to have an insulating property.

Meanwhile, as shown in fig. 4 and 5, a sealing element may be further disposed between the fastening cover 500 and the outer shell 220, the sealing element is preferably an annular sealing ring 600, an annular receiving groove 510 for receiving the annular sealing ring 600 is formed at the bottom end of the fastening cover 500, the annular sealing ring 600 is partially disposed in the annular receiving groove 510, and the fastening cover 500 is screwed to press the annular sealing ring 600 to deform the annular sealing ring 600 to form a seal, so as to further enhance the sealing effect on the through hole.

Of course, in other embodiments, the sealing member may be a sealing gasket clamped between the fastening cover 500 and the housing 220.

The solenoid 200 and the valve body 100 are mounted as follows:

the method comprises the steps of firstly matching the threaded end 410 of the fixing pin 400 with the threaded hole 710 of the stationary iron core 700, screwing and fixing to form an installation assembly, then sleeving the electromagnetic coil 200 on the installation assembly, installing the fixing piece 300, inserting the lower end of the fixing sleeve 310 of the fixing piece 300 into the through hole 212 of the coil framework 210, clamping the fixing piece 300 with the clamping end of the fixing pin 400, matching and fixing the groove 330 on the fixing piece 300 with the lug 233 on the electromagnetic coil 200, abutting the lower end face of the second external thread 320 of the fixing piece 300 against the upper end face 211 of the coil framework 210 of the electromagnetic coil 200 to realize the fixing of the electromagnetic coil 200, and finally screwing the fastening cover 500 provided with the annular sealing ring 600 with the second external thread 320 of the fixing piece 300 in a threaded manner to realize the sealing of the electromagnetic coil 200.

The solenoid valve 001 of this embodiment is mounted on the pilot valve 002 as a driving member of the pilot valve 002, preferably, as shown in fig. 3, the mounting sleeve 110 is disposed in parallel with the pilot valve body 100, the solenoid coil 200 has a rectangular cross section along the radial direction of the mounting assembly, i.e., the housing 220 has a rectangular cross section along the radial direction, the axis of the mounting assembly has a minimum lateral spacing D from the pilot valve body 100, as shown in fig. 6, the minimum distance D between the center line of the through hole and the outer periphery of the housing 220 is the minimum distance D_minThe maximum distance between the center line of the through hole and the outer periphery of the housing 220 is D_max，d、D_minAnd D_maxD is required to satisfy_min＜d＜D_max。

By setting D_minD to leave enough space between the mounting assembly and the pilot valve body 100 to ensure that the solenoid coil 200 is smoothly sleeved on the mounting assembly by setting D < D_maxTo limit the rotational angle of solenoid 200 on the mounting assembly.

The above description is only for the embodiments of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the description in the above embodiments and the accompanying drawings. Any modification which does not depart from the functional and structural principles of the utility model is intended to be included within the scope of the claims.

Claims

1. A solenoid valve, comprising:

the electromagnetic coil (200), there are through holes on the said electromagnetic coil (200);

the valve body (100) is provided with a mounting assembly, and the mounting assembly is inserted into the through hole;

the fixing piece (300) is located one end, far away from the valve body (100), of the electromagnetic coil (200) and comprises a clamping portion and a stopping portion, the clamping portion is connected with the mounting assembly in a clamping mode, and the stopping portion is abutted to the electromagnetic coil (200).

2. The solenoid valve according to claim 1, wherein said fixing member (300) comprises a fixing sleeve (310), said snap-fit portion is provided in said fixing sleeve (310), said mounting assembly is inserted into said fixing sleeve (310) and snap-fitted with said snap-fit portion, and an end surface of said fixing sleeve (310) near said solenoid coil (200) forms said stopper.

3. The electromagnetic valve according to claim 1, characterized in that one of the fixing member (300) and the mounting assembly is provided with a protrusion, and the other is provided with a clamping groove (421), and the protrusion is clamped into the clamping groove (421) to clamp the fixing member (300) and the mounting assembly.

4. The solenoid valve of claim 1 wherein a circumferential stop is provided between the solenoid coil (200) and the mount (300) to limit rotation of the mount (300).

5. The solenoid valve according to claim 4, wherein the circumferential limiting structure comprises a projection (223) arranged on one of the solenoid coil (200) and the fixing member (300), and a groove (330) for the projection (223) to be clamped is arranged on the other.

6. The electromagnetic valve according to any one of claims 1 to 5, characterized in that the mounting assembly comprises a mounting sleeve (110), a static iron core (700) and a fixing pin (400), the mounting sleeve (110) is arranged on the valve body (100), the static iron core (700) is fixed in the mounting sleeve (110), and the static iron core (700) is connected with the fixing member (300) through the fixing pin (400).

7. The electromagnetic valve according to any one of claims 1 to 5, characterized in that the mounting assembly comprises a mounting sleeve (110) and a stationary core (700), the stationary core (700) is fixed in the mounting sleeve (110), and the mounting sleeve (110) is clamped with the fixing member (300).

8. The solenoid valve according to any of the claims 1 to 5, characterized in that the fixing member (300) is made of an elastic material.

9. The electromagnetic valve according to any one of claims 1 to 5, wherein the electromagnetic coil (200) comprises a coil bobbin (210) and a housing (220), the coil bobbin (210) is embedded in the housing (220), the housing (220) adopts an integral plastic-sealed structure, the through hole penetrates through the coil bobbin (210) and the housing (220), the electromagnetic valve (001) further comprises a fastening cover (500), the fastening cover (500) covers the outside of the fixing member (300) and is in threaded connection with the fixing member (300), and the fastening cover (500) is pressed against the housing (220) and forms a seal by screwing the fastening cover (500).

10. The solenoid valve according to claim 9, characterized in that a seal is provided between the fastening cover (500) and the housing (220).

11. The solenoid valve according to claim 10, wherein the fastening cover (500) is made of a non-metallic material having elasticity.

12. A pilot valve, characterized by comprising a pilot valve body, a pilot valve spool arranged in the pilot valve body and a solenoid valve (001) according to any one of claims 1 to 11, wherein the solenoid valve (001) drives the pilot valve spool to move in the pilot valve body.

13. The pilot valve of claim 12, wherein the solenoid coil (200) is rectangular in cross-section in the radial direction of the mounting assembly, the axis of the mounting assembly is spaced a minimum distance d laterally from the pilot valve body, and the through-hole isHas a minimum distance D from the center line of the electromagnetic coil (200) to the outer periphery thereof_minThe maximum distance between the central line of the through hole and the periphery of the electromagnetic coil (200) is D_maxD, D_minAnd D_maxD is required to satisfy_min＜d＜D_max。

14. A four-way valve comprising a main valve and a pilot valve (002) as claimed in claim 12 or 13, said main valve comprising a main valve body and a main valve spool disposed within said main valve body, said pilot valve (002) driving said main valve spool to move within said main valve body.