CN218031422U - Electromagnetic valve - Google Patents

Abstract

The utility model provides a solenoid valve, include: a housing having a first flow through hole, a mounting cavity, and a second flow through hole; the valve core assembly is partially arranged in the mounting cavity and comprises a valve core; the valve core is provided with a first plugging position and a first communicating position relative to the valve port, the peripheral surface of the valve port close to one side of the valve core is provided with an installation groove, and the opening size of the installation groove is smaller than the size of the bottom of the installation groove; the sealing member is arranged in the mounting groove. Through the technical scheme that this application provided, the problem that the sealing washer of valve port department among the prior art very easily drops can be solved.

Description

Electromagnetic valve

Technical Field

The utility model relates to a solenoid valve technical field particularly, relates to a solenoid valve.

Background

At present, the solenoid valve has case subassembly, disk seat subassembly and a plurality of sealing washer, is provided with the valve port on the disk seat subassembly, and the sealing washer sets up between case subassembly and the disk seat subassembly and valve port department, but among the prior art, sealing washer department does not set up other limit structure, leads to the sealing washer easily not hard up, when the valve port department need carry out the gas flow, the sealing washer extrudes because of gaseous high-pressure flow to lead to solenoid valve overall structure stability relatively poor, its sealed effect is poor, thereby influences the normal work of solenoid valve.

SUMMERY OF THE UTILITY MODEL

The utility model provides a solenoid valve to solve the problem that the sealing washer of the valve port department among the prior art very easily drops.

The utility model provides a solenoid valve, solenoid valve includes: the shell is provided with a first flow through hole, a mounting cavity and a second flow through hole, and the first flow through hole and the second flow through hole are respectively communicated with the mounting cavity; the valve core assembly is partially arranged in the mounting cavity and is internally provided with a valve core; the valve seat assembly is arranged in the installation cavity, the valve core assembly is arranged corresponding to the valve seat assembly, a valve cavity is arranged between the valve core assembly and the valve seat assembly, the valve seat assembly is provided with a vent hole and a valve port, the vent hole is respectively communicated with the first flow through hole and the valve cavity, the valve port is respectively communicated with the second flow through hole and the valve cavity, the valve core is provided with a first plugging position and a first communicating position relative to the valve port, when the valve core is positioned at the first plugging position, the valve port is disconnected with the valve cavity, when the valve core is positioned at the first communicating position, the valve port is communicated with the valve cavity, the outer peripheral surface of one side, close to the valve core, of the valve port is provided with an installation groove, and the opening size of the installation groove is smaller than the size of the bottom of the installation groove; and the sealing element is arranged in the mounting groove.

Further, the valve seat assembly comprises: the valve seat body is provided with a valve port and is provided with a first end and a second end which are oppositely arranged, the first end of the valve seat body is abutted against the bottom of the installation cavity, the second end of the valve seat body is arranged corresponding to the valve core, and a first bulge is arranged at the second end of the valve seat body and surrounds the periphery of the valve port; the pressure sleeve is located at the second end of the valve seat main body, a vent hole is formed in the side wall of the pressure sleeve, the pressure sleeve is provided with a first end and a second end which are arranged oppositely, the first end of the pressure sleeve is abutted against the second end of the valve seat main body, the second end of the pressure sleeve is abutted against the valve core assembly, the pressure sleeve is annularly arranged on the periphery of the first bulge, one end, close to a valve port, of the valve core is arranged in the pressure sleeve, a space is formed between the inner wall of the pressure sleeve and the first bulge, and a mounting groove is formed at the space.

Furthermore, a second bulge is annularly arranged on the inner wall of the first end of the pressing sleeve, and the inner diameter of the second bulge is gradually increased from the direction far away from the valve core; and/or the outer diameter of the first bulge gradually decreases in the direction away from the valve core.

Furthermore, the sealing element is made of rubber materials, an arc-shaped bulge is arranged on the end face, close to the valve core, of the sealing element, and the arc-shaped bulge is used for being matched and sealed with the valve core.

Further, the seal includes: the first ring body is made of rubber materials and arranged in the mounting groove, and the first ring body is close to the bottom of the mounting groove; the second circle body, the second circle body adopts engineering plastics to make, and at least part second circle body is located the mounting groove, and the second circle body has the reducing section and the straightway of connecting in order along the axis direction, and the reducing section is close to the opening setting of mounting groove with the structure looks adaptation of mounting groove, straightway's lateral wall and the opening periphery looks butt of mounting groove, is provided with the spacing groove on the second circle body is close to the terminal surface of first circle body, and partial first circle body sets up at the spacing inslot.

Further, the case is provided with pilot holes, and the pilot holes run through the both ends of case, and the case subassembly still includes: the guide sleeve is at least partially arranged in the mounting cavity and is detachably connected with the shell, the guide sleeve is provided with a first stepped hole and a second stepped hole which are mutually communicated, a stepped surface is arranged between the first stepped hole and the second stepped hole, the aperture of the first stepped hole is larger than that of the second stepped hole, the first stepped hole is arranged close to the valve port, and the valve core is partially arranged in the first stepped hole; the armature is movably arranged in the second stepped hole and connected with the valve core, a balance cavity is arranged between the armature and the valve core, and the armature has an initial position, a first opening position and a second opening position which are oppositely arranged; the pilot valve is arranged at one end, close to the valve core, of the armature and moves synchronously with the armature, and the pilot valve is provided with a second plugging position for plugging the pilot hole and a second communication position far away from the pilot hole; the balance channel is arranged between the valve core assembly and the guide sleeve, one end of the balance channel is communicated with the first flow through hole, the other end of the balance channel is communicated with the balance cavity, the pilot hole is disconnected with the balance cavity when the pilot valve is at the second plugging position, and the pilot hole is communicated with the balance cavity when the pilot valve is at the second connecting position; when the armature is at the initial position, the valve core is at the first plugging position, and the pilot valve is at the second plugging position; when the armature is at the first opening position, the valve core is at the first blocking position, and the pilot valve is at the second communication position; when the armature is in the second open position, the valve spool is in the first communication position.

Furthermore, the valve core is provided with a first end and a second end which are oppositely arranged, the second end of the valve core is arranged close to the armature, a gap is arranged between one side, close to the first flow through hole, of the valve core and the side wall of the first stepped hole, the gap is communicated with the first flow through hole, the second end of the valve core is provided with a groove and a communication hole, the groove forms a balance cavity, one end of the communication hole is located on the end face of the second end of the valve core, the other end of the communication hole is arranged on the side wall of the valve core and is communicated with the gap, and the communication hole and the gap are matched to form a balance channel.

Further, the lateral wall of the second end of case is provided with first fixed arch, and the lateral wall that armature is close to the one end of case is provided with the fixed arch of second, and the solenoid valve still includes: the buckle is provided with a clamping groove in the height direction of the buckle, the first fixing protrusion and the second fixing protrusion are arranged in the clamping groove, and the height of the clamping groove is larger than the sum of the thickness of the first fixing protrusion and the thickness of the second fixing protrusion.

Further, the second end of the valve core is provided with a third bulge, the third bulge is arranged around the periphery of the pilot hole, the pilot hole comprises a third stepped hole, a fourth stepped hole and a fifth stepped hole, the diameter of the third stepped hole is larger than that of the fourth stepped hole, and the diameter of the fourth stepped hole is larger than that of the fifth stepped hole.

Furthermore, chamfers are arranged on the inner side and the outer side of one end, far away from the valve core, of the third protrusion, the third protrusion is provided with a through hole, the through hole is communicated with the pilot hole, the diameter of one end, far away from the valve core, of the through hole is gradually reduced towards the direction close to the valve core, and the width of the end face of one end, far away from the valve core, of the third protrusion is 0.3 mm-0.5 mm.

Use the technical scheme of the utility model, be provided with first flow through hole and second flow through hole on the casing, be provided with air vent and valve port on the disk seat, the valve pocket has between case subassembly and the disk seat subassembly, first flow through hole passes through air vent and valve pocket intercommunication, the second flow through hole passes through valve port and valve pocket intercommunication, can carry out the circulation of gas between first flow through hole and the second flow through hole, and be provided with the mounting groove in valve port department, the opening size of mounting groove is less than the size of the tank bottom of mounting groove, the sealing member sets up in the mounting groove. So set up, when the case was in first continuous position, gaseous can circulate between first through-flow hole, valve port and second through-flow hole, and the mounting groove can play the fixed action to the sealing member, avoids the sealing member to extrude because of gaseous high pressure flows, and then can guarantee the follow-up work of solenoid valve, the sealed effect of sealing member.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a solenoid valve according to an embodiment of the present invention;

FIG. 2 shows a partial enlarged view at A in FIG. 1;

FIG. 3 shows a schematic structural view of a second embodiment of the seal;

FIG. 4 is a schematic view of the mating structure of the first collar body and the second collar body;

FIG. 5 shows a partial enlarged view at B in FIG. 1;

FIG. 6 shows a close-up view at C in FIG. 1;

FIG. 7 shows a partial enlarged view at D in FIG. 1;

fig. 8 shows a schematic structural diagram of a third protrusion provided according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a housing; 11. a first flow through hole; 12. a second flow through hole;

21. a valve core; 211. a pilot hole; 212. a first fixing projection; 213. a third protrusion; 2131. a through hole;

22. a guide sleeve; 221. a first stepped hole; 222. a second stepped bore;

23. an armature; 231. a balancing chamber; 232. a second fixing projection;

24. a pilot valve;

25. a balancing channel; 251. a gap; 252. a communicating hole;

31. a valve cavity; 32. mounting grooves; 33. a valve seat body; 331. a valve port; 332. a first protrusion; 34. pressing a sleeve; 341. a vent hole; 342. a second protrusion;

40. a seal member; 41. a first ring body; 42. a second ring body;

50. a retaining ring;

60. a stationary core;

70. a spring;

80. a coil assembly;

90. and a second seal ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the present application provides a solenoid valve including a housing 10, a spool assembly, a valve seat assembly, and a seal 40. The casing 10 has a first through-flow hole 11, a mounting cavity, and a second through-flow hole 12, the first through-flow hole 11 and the second through-flow hole 12 communicating with the mounting cavity, respectively. In the present application, the process of the gas flowing from the first flow through hole 11 to the second flow through hole 12 is a hydrogen supply process, and the process of the gas flowing from the second flow through hole 12 to the first flow through hole 11 is a hydrogenation process. A spool assembly is partially disposed within the mounting cavity, the spool assembly having a spool 21 therein. The valve seat assembly is arranged in the installation cavity, the valve core assembly and the valve seat assembly are correspondingly arranged, and a valve cavity 31 is formed between the valve core assembly and the valve seat assembly. The valve seat assembly has a vent hole 341 and a valve port 331, the vent hole 341 communicating with the first flow through hole 11 and the valve chamber 31, respectively, and the valve port 331 communicating with the second flow through hole 12 and the valve chamber 31, respectively. The valve element 21 has a first blocking position and a first communicating position relative to the valve port 331, when the valve element 21 is in the first blocking position, the valve port 331 is disconnected from the valve chamber 31, and when the valve element 21 is in the first communicating position, the valve port 331 is communicated with the valve chamber 31. The outer peripheral surface of the valve port 331 on the side close to the valve element 21 has a mounting groove 32, the opening size of the mounting groove 32 is smaller than the groove bottom size of the mounting groove 32, and the sealing member 40 is disposed in the mounting groove 32.

By applying the technical scheme of the application, the housing 10 is provided with the first flow through hole 11 and the second flow through hole 12, the valve seat is provided with the vent hole 341 and the valve port 331, the valve cavity 31 is arranged between the valve core component and the valve seat component, the first flow through hole 11 is communicated with the valve cavity 31 through the vent hole 341, the second flow through hole 12 is communicated with the valve cavity 31 through the valve port 331, gas circulation can be performed between the first flow through hole 11 and the second flow through hole 12, the valve port 331 is provided with the mounting groove 32, the opening size of the mounting groove 32 is smaller than the size of the bottom of the mounting groove 32, and the sealing element 40 is arranged in the mounting groove 32. With this arrangement, when the valve body 21 is in the first communication position, gas can flow through the first communication hole 11, the valve port 331, and the second communication hole 12, and the mounting groove 32 can fix the seal member 40. In the prior art, the installation groove 32 is usually provided with a straight line segment or a single-side dovetail groove structure, so that the sealing element 40 is easily blown out when being arranged in the installation groove 32, and in the application, the opening size of the installation groove 32 is smaller than the size of the groove bottom of the installation groove 32, so that the sealing element 40 can be prevented from being extruded due to high-pressure gas flow, and the sealing effect of the sealing element 40 in the subsequent work of the electromagnetic valve can be further ensured.

Wherein the valve seat assembly includes a valve seat main body 33 and a pressing sleeve 34. The valve seat main body 33 has a valve port 331, the valve seat main body 33 has a first end and a second end which are oppositely arranged, the first end of the valve seat main body 33 is abutted against the bottom of the mounting cavity, the second end of the valve seat main body 33 is arranged corresponding to the valve core 21, the second end of the valve seat main body 33 is provided with a first protrusion 332, and the first protrusion 332 is arranged around the periphery of the valve port 331. The pressure sleeve 34 is located at the second end of the valve seat main body 33, the vent hole 341 is provided on the side wall of the pressure sleeve 34, the pressure sleeve 34 has a first end and a second end which are oppositely arranged, the first end of the pressure sleeve 34 abuts against the second end of the valve seat main body 33, the second end of the pressure sleeve 34 abuts against the valve core assembly, and specifically, in the present application, the second end of the pressure sleeve 34 abuts against the guide sleeve 22. The pressing sleeve 34 is annularly arranged on the periphery of the first protrusion 332, one end of the valve core 21 close to the valve port 331 is arranged in the pressing sleeve 34, and a gap is formed between the inner wall of the pressing sleeve 34 and the first protrusion 332 to form the mounting groove 32. The pressing sleeve 34 is arranged on the valve seat main body 33 and can fix the valve seat to prevent the valve seat from moving in the working process. Be provided with mounting groove 32 between the inner wall of pressing sleeve 34 and first arch 332, sealing member 40 sets up in mounting groove 32, so set up, can fix sealing member 40, and simple structure, the installation of being convenient for, and sealing member 40 sets up in the interval between the inner wall of pressing sleeve 34 and first arch 332 simultaneously, can make the interior structure of solenoid more compact.

Specifically, a second protrusion 342 is annularly arranged on the inner wall of the first end of the pressing sleeve 34, and the inner diameter of the second protrusion 342 gradually increases from the direction away from the valve core 21; and/or the outer diameter of the first protrusion 332 decreases in a direction away from the valve core 21. So set up, need not add other parts and can fix sealing member 40, reduced the manufacturing cost and the installation degree of difficulty of solenoid valve. In this application, the inner diameter of the second protrusion 342 gradually increases from the direction away from the valve core 21, and the outer diameter of the first protrusion 332 gradually decreases from the direction away from the valve core 21, so as to further ensure the fixing effect of the second protrusion 342 and the first protrusion 332 on the sealing element 40, and avoid the sealing element 40 from falling off. Wherein, a plurality of vent holes 341 are annularly arranged on the side wall of the pressing sleeve 34, and the plurality of vent holes 341 are communicated with the first flow through hole 11 through the mounting cavity. With such an arrangement, after the gas in the first flow through hole 11 enters the installation cavity, the gas can rapidly enter the valve port 331 through the plurality of vent holes 341, so that the circulation speed of the gas can be increased, and the gas can be prevented from being blocked in the installation cavity.

As shown in fig. 2, the sealing member 40 is made of a rubber material, and an end surface of the sealing member 40 close to the valve core 21 is provided with an arc-shaped protrusion for cooperating and sealing with the valve core 21. So set up, realize soft seal between sealing member 40 and the case 21, be provided with the sealed effect that the arc arch can guarantee sealing member 40 and case 21, avoid gas leakage at sealed in-process.

As shown in fig. 1 to 5, the spool 21 is provided with pilot holes 211, the pilot holes 211 penetrating both ends of the spool 21, and the spool assembly further includes a guide sleeve 22, an armature 23, a pilot shutter 24, and a balance passage 25. The guide sleeve 22 is at least partially arranged in the installation cavity, the guide sleeve 22 is detachably connected with the shell 10, the guide sleeve 22 is provided with a first stepped hole 221 and a second stepped hole 222 which are communicated with each other, a stepped surface is arranged between the first stepped hole 221 and the second stepped hole 222, the aperture of the first stepped hole 221 is larger than that of the second stepped hole 222, the first stepped hole 221 is arranged close to the valve port 331, and the valve core 21 is partially arranged in the first stepped hole 221. With this arrangement, the movement range of the valve body 21 can be restricted. The armature 23 is movably disposed within the second stepped bore 222, the armature 23 is coupled to the valve spool 21, a balance chamber 231 is disposed between the armature 23 and the valve spool 21, and the armature 23 has an initial position, a first open position, and a second open position that are oppositely disposed. A pilot valve 24 is provided at an end of the armature 23 close to the spool 21, the pilot valve 24 moves in synchronization with the armature 23, and the pilot valve 24 has a second blocking position blocking the pilot hole 211 and a second communication position away from the pilot hole 211. The balance channel 25 is arranged between the valve core assembly and the guide sleeve 22, one end of the balance channel 25 is communicated with the first flow through hole 11, the other end of the balance channel 25 is communicated with the balance cavity 231, when the pilot valve 24 is in the second blocking position, the pilot hole 211 is disconnected from the balance cavity 231, and when the pilot valve 24 is in the second communication position, the pilot hole 211 is communicated with the balance cavity 231. The balance channel 25 is arranged between the valve core assembly and the guide sleeve 22, so that the force required when the valve core 21 moves upwards can be reduced, and the working difficulty of the electromagnetic valve can be reduced. When the armature 23 is at an initial position, the valve core 21 is at a first blocking position, and the pilot valve 24 is at a second blocking position; when the armature 23 is in the first open position, the spool 21 is in the first blocking position, and the pilot valve 24 is in the second communication position; when the armature 23 is in the second open position, the spool 21 is in the first communication position. With such arrangement, the movement of the armature 23 can be divided into two processes in the hydrogen supply process, the armature 23 moves to the first open position first, the pilot valve 24 is driven to move at this time, the balance channel 25 is communicated with the pilot hole 211, so that the solenoid valve is in a balanced state, the armature 23 moves to the second open position, the valve core 21 is driven to move at this time, the valve core 21 is in the first communication position, and the valve port 331 is communicated with the valve cavity 31.

As shown in fig. 6, the valve core 21 has a first end and a second end which are oppositely arranged, the second end of the valve core 21 is arranged near the armature 23, one side of the valve core 21 near the first flow through hole 11 and a side wall of the first stepped hole 221 are provided with a gap 251, the gap 251 is communicated with the first flow through hole 11, the second end of the valve core 21 is provided with a notch and a communication hole 252, the notch forms a balance chamber 231, one end of the communication hole 252 is positioned on an end surface of the second end of the valve core 21, the other end of the communication hole 252 is arranged on the side wall of the valve core 21 and is communicated with the gap 251, and the communication hole 252 and the gap 251 cooperate to form a balance channel 25. With this arrangement, the structure of the balance passage 25 can be simplified, and the valve body 21 can be easily processed. In the present application, a gap 251 may be formed between the side wall of the first stepped hole 221 and the side wall of the planar structure processed on the side wall of the valve element 21, so that when the balance channel 25 is formed by processing, only the valve element 21 needs to be processed, thereby reducing the processing process and improving the working efficiency.

Wherein, the outer side wall of the second end of the valve core 21 is provided with a first fixing protrusion 212, and the outer side wall of the end of the armature 23 close to the valve core 21 is provided with a second fixing protrusion 232. The electromagnetic valve further comprises a retaining ring 50, a clamping groove is formed in the height direction of the retaining ring 50, the first fixing protrusion 212 and the second fixing protrusion 232 are arranged in the clamping groove, and the height of the clamping groove is larger than the sum of the thickness of the first fixing protrusion 212 and the thickness of the second fixing protrusion 232. With such an arrangement, in the hydrogen supply process, the pilot valve 24 in the solenoid valve can be firstly located at the second communication position, so that the pressure in the solenoid valve is balanced, and then the valve core 21 is located at the first communication position, so that the valve port 331 is communicated with the valve cavity 31, and the gas can flow from the first flow through hole 11 to the second flow through hole 12. By adopting the structure, the retaining ring 50 is matched with the first fixing protrusion 212 and the second fixing protrusion 232, so that the armature 23 can drive the valve core 21 to move up and down through the retaining ring 50, the structure is simple and compact, the armature 23, the valve core 21 and the retaining ring 50 can be conveniently installed, the retaining ring 50 is attached to the inner wall of the guide sleeve 22 in the up-and-down moving process, the guide sleeve 22 can guide the movement of the retaining ring 50, the moving stability of the retaining ring 50 can be ensured, and the up-and-down moving stability of the armature 23 and the valve core 21 can be ensured.

As shown in fig. 7, the second end of the spool 21 is provided with a third projection 213, and the third projection 213 is provided around the outer periphery of the pilot hole 211. When the pilot valve 24 blocks the pilot hole 211, the third protrusion 213 abuts against the pilot valve 24, the pilot valve 24 and the third protrusion 213 are soft sealed, and the elasticity of the material used for the pilot valve 24 is relatively large, so that the sealing effect of the pilot valve 24 on the pilot hole 211 can be ensured. The pilot hole 211 includes a third stepped hole, a fourth stepped hole, and a fifth stepped hole, the diameter of the third stepped hole being larger than the diameter of the fourth stepped hole, and the diameter of the fourth stepped hole being larger than the diameter of the fifth stepped hole. So set up, when gaseous circulation in pilot hole 211, can produce the pressure differential between third shoulder hole and fourth shoulder hole and fifth shoulder hole, when gaseous by second flow through hole 12 flow to first flow through hole 11, be convenient for drive valve core 21 and armature 23 rebound, and then can accelerate gaseous circulation speed. In this application, be provided with the changeover portion between third shoulder hole and fourth shoulder hole and the fifth shoulder hole, so set up, can avoid gaseous removal in-process to produce stress concentration and cause the damage to case 21.

Furthermore, chamfers are arranged on the inner side and the outer side of one end, far away from the valve core 21, of the third protrusion 213, the third protrusion 213 is provided with a through hole 2131, the through hole 2131 is communicated with the pilot hole 211, the diameter of one end, far away from the valve core 21, of the through hole 2131 is gradually reduced towards the direction close to the valve core 21, and the width of the end face, far away from one end of the valve core 21, of the third protrusion 213 is between 0.3mm and 0.5 mm. With the arrangement, the chamfer on the outer side of the third protrusion 213 can prevent the pilot valve 24 from being damaged in the process of plugging the pilot hole 211, so that the service life of the pilot valve 24 can be prolonged, and meanwhile, the chamfer and the through hole 2131 on the inner side of the third protrusion 213 can prevent gas from generating stress concentration in the flowing process, so that the third protrusion 213 can be prevented from generating cracks, and the service life of the valve element 21 can be prolonged. When the width of the end surface is less than 0.3mm, the processing difficulty and the processing cost of the third protrusion 213 are improved, and meanwhile, in the processing process, the third protrusion 213 is easily damaged, and the structural strength of the third protrusion 213 is reduced; when the width of the end face is larger than 0.5mm, the sealing effect is poor when the pilot valve 24 blocks the pilot hole 211; therefore, setting the width of the end face between 0.3mm and 0.5mm can ensure the structural strength of the third protrusion 213, and can ensure the sealing effect when the pilot valve 24 seals the pilot hole 211, thereby preventing gas leakage.

Wherein, the solenoid valve further comprises a static iron core 60, a spring 70, a coil assembly 80 and a second sealing ring 90. The static iron core 60 is arranged in the guide sleeve 22, the static iron core 60 is detachably connected with the guide sleeve 22, and the spring 70 is arranged between the static iron core 60 and the armature 23. The coil assembly 80 is disposed outside the guide sleeve 22 and at the outer periphery of the stationary core 60. When the coil assembly 80 is powered on, the static iron core 60 can attract the armature 23 to move upwards, and after the coil assembly 80 is powered off, the spring 70 can drive the armature 23 to move downwards, meanwhile, in the application, a pressing block is arranged between the spring 70 and the pilot valve 24, so that the pressure generated by the spring 70 can be uniformly applied to the pilot valve 24, and the sealing effect of the pilot valve 24 on the pilot hole 211 can be ensured. Between casing 10 and guide pin bushing 22, all be provided with second sealing washer 90 between valve seat main part 33 and the casing 10, can further guarantee the interior leakproofness of solenoid valve like this, avoid producing gaseous revealing in the solenoid valve, simultaneously, in this application, second sealing washer 90 department all is provided with the retaining ring, and second sealing washer 90 and retaining ring set up along gaseous circulation direction, so can avoid second sealing washer 90 to drop because of gaseous blowing.

As shown in fig. 3 and 4, a second embodiment of the present invention provides a solenoid valve, which is different from the first embodiment in that the sealing member 40 includes: the first ring body 41, the first ring body 41 is made of rubber material, the first ring body 41 is arranged in the mounting groove 32, and the first ring body 41 is arranged near the bottom of the mounting groove 32; the second ring body 42 is made of engineering plastics. So set up, first circle body 41 adopts the rubber materials who is applicable to high-pressure hydrogen to make to can realize elastic compensation, guarantee sealing member 40's sealed effect. The second ring body 42 can be made of polytetrafluoroethylene engineering plastics, so that the second ring body 42 still has good shaping performance at low temperature, the service life of the second ring body 42 can be prolonged, and the service life of the sealing element 40 can be prolonged. Wherein, at least partial second circle body 42 is located mounting groove 32, and second circle body 42 has the reducing section and the straightway of connecting in order along the axis direction, and the reducing section of second circle body 42 reduces to the opening direction diameter of mounting groove 32 along the bottom of mounting groove 32, and the reducing section is adapted with the structure of mounting groove 32, and the straightway is close to the opening setting of mounting groove 32, and the lateral wall of straightway and the opening periphery looks butt of mounting groove 32. The end face of the second ring body 42 close to the first ring body 41 is provided with a limiting groove, and part of the first ring body 41 is arranged in the limiting groove, so that the first ring body 41 can be prevented from moving radially, and the elastic compensation effect of the first ring body 41 is ensured. In order to ensure that the second ring body 42 can be smoothly placed in the mounting groove 32, a gap is usually provided between the reducing section and the mounting groove 32, and the side wall of the straight section abuts against the opening periphery of the mounting groove 32, so that the second ring body 42 can be prevented from moving radially, and the sealing effect when the second ring body 42 is sealed can be ensured. Further, the upper surface of the straight section is a flat surface, which can further improve the sealing property between the second ring body 42 and the valve body 21. Simultaneously, in this application, the opening part of mounting groove 32 is provided with the chamfer, and the chamfer can increase the area of contact of opening and second circle body 42 with the straightway looks butt of second circle body 42 like this, at the in-process of both butts, can reduce the power that second circle body 42 unit area received, avoids second circle body 42 to produce and damages to can improve second circle body 42's life.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "above … …", "above … …", "above … … upper surface", "above", etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A solenoid valve, characterized in that it comprises:

a housing (10), the housing (10) having a first flow through hole (11), a mounting cavity and a second flow through hole (12), the first flow through hole (11) and the second flow through hole (12) being respectively communicated with the mounting cavity;

a valve core assembly partially disposed within the mounting cavity, the valve core assembly having a valve core (21) therein;

the valve seat assembly is arranged in the installation cavity, the valve core assembly is arranged corresponding to the valve seat assembly, a valve cavity (31) is arranged between the valve core assembly and the valve seat assembly, the valve seat assembly is provided with a vent hole (341) and a valve port (331), the vent hole (341) is respectively communicated with the first flow through hole (11) and the valve cavity (31), the valve port (331) is respectively communicated with the second flow through hole (12) and the valve cavity (31), the valve core (21) is provided with a first blocking position and a first communicating position relative to the valve port (331), when the valve core (21) is positioned at the first blocking position, the valve port (331) is disconnected with the valve cavity (31), when the valve core (21) is positioned at the first communicating position, the valve port (331) is communicated with the valve cavity (31), the outer peripheral surface of one side of the valve core (331) close to the valve core (21) is provided with an installation groove (32), and the opening size of the installation groove (32) is smaller than the size of the groove bottom of the installation groove (32);

a sealing member (40) disposed within the mounting groove (32).

2. The solenoid valve of claim 1, wherein the valve seat assembly comprises:

the valve seat main body (33), the valve seat main body (33) is provided with the valve port (331), the valve seat main body (33) is provided with a first end and a second end which are arranged oppositely, the first end of the valve seat main body (33) is abutted against the bottom of the installation cavity, the second end of the valve seat main body (33) is arranged corresponding to the valve core (21), the second end of the valve seat main body (33) is provided with a first bulge (332), and the first bulge (332) is arranged around the periphery of the valve port (331);

the pressure sleeve (34) is located at the second end of the valve seat main body (33), a vent hole (341) is formed in the side wall of the pressure sleeve (34), the pressure sleeve (34) is provided with a first end and a second end which are oppositely arranged, the first end of the pressure sleeve (34) is abutted against the second end of the valve seat main body (33), the second end of the pressure sleeve (34) is abutted against the valve core assembly, the pressure sleeve (34) is annularly arranged on the periphery of the first protrusion (332), one end, close to the valve port (331), of the valve core (21) is arranged in the pressure sleeve (34), a gap is formed between the inner wall of the pressure sleeve (34) and the first protrusion (332), and the gap forms the mounting groove (32).

3. The electromagnetic valve according to claim 2, characterized in that a second protrusion (342) is annularly arranged on the inner wall of the first end of the pressing sleeve (34), and the inner diameter of the second protrusion (342) is gradually increased from the direction away from the valve core (21); and/or the outer diameter of the first bulge (332) is gradually reduced along the direction far away from the valve core (21).

4. The electromagnetic valve according to claim 2, characterized in that the sealing element (40) is made of rubber material, and an arc-shaped protrusion is arranged on the end surface of the sealing element (40) close to the valve core (21), and the arc-shaped protrusion is used for matching and sealing with the valve core (21).

5. The solenoid valve according to claim 2, characterized in that said seal (40) comprises:

the first ring body (41), the first ring body (41) is made of rubber materials, the first ring body (41) is arranged in the installation groove (32), and the first ring body (41) is arranged close to the bottom of the installation groove (32);

the second circle body (42), the second circle body (42) adopts engineering plastics to make, at least part the second circle body (42) is located in mounting groove (32), the second circle body (42) have along axis direction reducer section and the straightway of connecting in order, the reducer section with the structure looks adaptation of mounting groove (32), the straightway is close to the opening setting of mounting groove (32), the lateral wall of straightway with the opening periphery looks butt of mounting groove (32), the second circle body (42) are close to be provided with the spacing groove on the terminal surface of first circle body (41), part first circle body (41) set up in the spacing inslot.

6. The solenoid valve according to claim 2, wherein the spool (21) is provided with pilot holes (211), the pilot holes (211) penetrating both ends of the spool (21), the spool assembly further comprising:

a guide sleeve (22) at least partially arranged in the mounting cavity, wherein the guide sleeve (22) is detachably connected with the shell (10), the guide sleeve (22) is provided with a first stepped hole (221) and a second stepped hole (222) which are communicated with each other, a stepped surface is arranged between the first stepped hole (221) and the second stepped hole (222), the aperture of the first stepped hole (221) is larger than that of the second stepped hole (222), the first stepped hole (221) is arranged close to the valve port (331), and the valve core (21) is partially arranged in the first stepped hole (221);

an armature (23) movably disposed within the second stepped bore (222), the armature (23) being coupled to the valve spool (21), a balance chamber (231) being disposed between the armature (23) and the valve spool (21), the armature (23) having an initial position, a first open position, and a second open position that are oppositely disposed;

the pilot valve (24) is arranged at one end, close to the valve core (21), of the armature (23), the pilot valve (24) moves synchronously with the armature (23), and the pilot valve (24) is provided with a second blocking position for blocking the pilot hole (211) and a second communication position far away from the pilot hole (211);

a balance channel (25) arranged between the valve core assembly and the guide sleeve (22), wherein one end of the balance channel (25) is communicated with the first flow through hole (11), the other end of the balance channel (25) is communicated with the balance cavity (231), when the pilot valve (24) is in a second blocking position, the pilot hole (211) is disconnected from the balance cavity (231), and when the pilot valve (24) is in a second communication position, the pilot hole (211) is communicated with the balance cavity (231);

when the armature (23) is at the initial position, the valve core (21) is at the first blocking position, and the pilot valve (24) is at the second blocking position; when the armature (23) is in the first open position, the valve core (21) is in the first blocking position, and the pilot valve (24) is in the second communication position; when the armature (23) is in the second open position, the valve spool (21) is in the first communication position.

7. The electromagnetic valve according to claim 6, wherein the spool (21) has a first end and a second end disposed oppositely, the second end of the spool (21) is disposed near the armature (23), one side of the spool (21) near the first flow through hole (11) and a side wall of the first stepped hole (221) are provided with a gap (251), the gap (251) communicates with the first flow through hole (11), the second end of the spool (21) is provided with a slot forming the balance chamber (231) and a communication hole (252), one end of the communication hole (252) is located on an end surface of the second end of the spool (21), the other end of the communication hole (252) is disposed on the side wall of the spool (21) and communicates with the gap (251), and the communication hole (252) and the gap (251) cooperate to form the balance channel (25).

8. The solenoid valve according to claim 7, characterized in that the outer side wall of the second end of the spool (21) is provided with a first fixing protrusion (212), and the outer side wall of the armature (23) near one end of the spool (21) is provided with a second fixing protrusion (232), the solenoid valve further comprising:

the buckle (50) is provided with a clamping groove along the height direction of the buckle (50), the first fixing protrusion (212) and the second fixing protrusion (232) are arranged in the clamping groove, and the height of the clamping groove is larger than the sum of the thickness of the first fixing protrusion (212) and the thickness of the second fixing protrusion (232).

9. The electromagnetic valve according to claim 6, characterized in that the second end of the spool (21) is provided with a third protrusion (213), the third protrusion (213) is provided around the outer circumference of the pilot hole (211), the pilot hole (211) comprises a third stepped hole, a fourth stepped hole and a fifth stepped hole, the diameter of the third stepped hole is larger than that of the fourth stepped hole, and the diameter of the fourth stepped hole is larger than that of the fifth stepped hole.

10. The electromagnetic valve according to claim 9, wherein the third protrusion (213) has a chamfered portion on both the inside and the outside of an end thereof remote from the spool (21), the third protrusion (213) has a through hole (2131), the through hole (2131) communicates with the pilot hole (211), the diameter of the end of the through hole (2131) remote from the spool (21) is gradually reduced toward the spool (21), and the width of the end surface of the end of the third protrusion (213) remote from the spool (21) is between 0.3mm and 0.5 mm.

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