CN204372226U - a solenoid valve - Google Patents

Abstract

The utility model provides a solenoid valve belongs to the fluid control component field, including valve body, case, guide's well seat and miniature pilot valve. The pilot middle seat is connected with the valve body, a groove is formed in one end, close to the valve body, of the pilot middle seat, and a middle seat piston used for pushing the valve core is arranged in the groove. The pilot middle seat is provided with an air inlet hole and an air outlet hole, and when the micro pilot valve is connected with a power supply, the air inlet hole, the inner cavity of the micro pilot valve, the air outlet hole and the groove can form a communicated air path passage. The utility model provides a solenoid valve has reduced manufacturing cost, has practiced thrift the energy, has optimized the structure simultaneously, and the assembly is simple, has improved the assembly qualification rate.

Description

a solenoid valve

technical field

The utility model relates to the field of fluid control elements, in particular to an electromagnetic valve.

Background technique

Solenoid valve is an industrial equipment controlled by electromagnetic, and it is an automatic basic component used to control fluid. At present, the pilot part of a solenoid valve commonly used in the industry includes an independent pilot valve and a high-power coil. However, the volume of the pilot and coil parts of this electromagnetic valve is large, the pressure of the pilot moving iron core is relatively high, and a larger current is required to open the moving iron core, so more raw materials are used, the coil power is high, and the production cost is high; and the coil, The pilot, pilot pressure plate, and pilot middle seat are all independent parts, which need to be connected one by one during assembly. There are many assembly processes, which are not only time-consuming but also easy to cause leakage.

Utility model content

The utility model provides a solenoid valve, which aims to improve the existing solenoid valves which use more raw materials, high coil power, high production cost, and many assembly processes, which not only consume time but also easily cause leakage.

The utility model is achieved in that:

A solenoid valve, including a valve body and a valve core arranged inside the valve body, the solenoid valve also includes a pilot center seat and a miniature pilot valve;

The pilot middle seat is connected to the valve body, a groove is arranged at one end of the pilot middle seat close to the valve body, and a middle seat piston for pushing the valve core is arranged in the groove;

The pilot middle seat is provided with an air inlet and an air outlet. When the miniature pilot valve is powered on, the air inlet, the inner cavity of the miniature pilot valve, the air outlet and the groove A connected gas path can be formed.

Further, the miniature pilot valve includes a pilot valve seat, a pilot valve moving iron core, and a pilot valve coil for controlling the movement of the pilot valve moving iron core;

The valve seat of the pilot valve is provided with an air inlet and an air outlet, one end of the air inlet communicates with the air inlet, and the other end communicates with the inner cavity of the miniature pilot valve, and the outlet of the air One end communicates with the air outlet, and the other end is provided with an air passage opening that can communicate with the inner cavity of the miniature pilot valve, and the moving iron core of the pilot valve can close the air passage opening;

When the moving iron core of the pilot valve moves, the air inlet, the air inlet, the internal cavity of the miniature pilot valve, the air outlet, the air outlet and the groove can form a communication air path.

By setting the pilot valve seat, the pilot valve moving iron core and the pilot valve moving iron core on the miniature pilot valve, when the pilot valve moving iron core is energized, the moving iron core moves, Open the air passage port, so that the air inlet hole, the air inlet passage, the internal cavity of the miniature pilot valve, the air outlet passage, the air outlet hole and the groove can form a connected air passage passage, so that the compressed air pushes the middle-seat piston in the groove, and the middle-seat piston pushes the valve core to realize the reversing of the valve core.

Further, the pilot middle seat is provided with a passage and a middle seat manual valve stem that can close the air inlet hole and the air outlet hole, and the middle seat manual valve stem can slide in the passage, and the passages are respectively It communicates with the air inlet, the air inlet, the air outlet, and the air outlet.

By setting the manual valve rod of the middle seat, even if the compressed air does not pass through the micro-pilot valve, the air inlet hole can be communicated with the air outlet hole even when there is no electricity, thereby pushing the middle seat piston, The middle seat piston pushes the spool to realize the reversing of the spool. It is ensured that even if the micro-pilot valve fails or the micro-pilot valve cannot be energized, the reversing of the spool can be realized through manual operation.

Further, the front end of the middle-seat manual valve stem is provided with a first projection for closing the air outlet hole, and the rear end of the middle-seat manual valve stem is provided with a second projection for closing the air inlet hole .

By arranging the first protrusion and the second protrusion, the middle seat manual valve rod can respectively close the air outlet hole and the air inlet hole.

Further, both the first bump and the second bump are ring-shaped. Both the first protrusion and the second protrusion are ring-shaped, so that even if the middle seat manual valve stem rotates axially during sliding, the first protrusion and the second protrusion can The air outlet hole and the air inlet hole are well closed separately, so as to avoid leakage and affect manual control of the valve core reversing.

Further, both the first protrusion and the second protrusion are provided with an annular groove, and an elastic member is disposed in the annular groove. By arranging the elastic member, while realizing the sliding of the middle-seat manual valve stem, it can well play a role of sealing, and avoid leakage that affects the manual control of the valve core reversing.

Further, the pilot center seat is provided with a first air guide channel at a position corresponding to the position between the first bump and the second bump, and the two ends of the first air guide channel are respectively connected to the The channel communicates with the air inlet;

The position of the pilot middle seat corresponding to the front end of the manual valve rod of the middle seat is provided with a second air guide channel, and the two ends of the second air guide channel communicate with the channel and the air outlet channel respectively.

Usually, the distance between the first protrusion and the second protrusion of the middle seat manual valve stem is equal to the distance between the air outlet hole and the air inlet hole, the When the middle-seat manual valve stem slides in the passage, the first bump and the second bump respectively close the air outlet hole and the air inlet hole at the same time. By setting the first air guide channel and the second air guide channel, when the manual valve stem of the middle seat slides in the channel, the air intake hole, the channel, the first air guide channel, and the air intake channel are realized. The channel, the internal cavity of the miniature pilot valve, the air outlet channel, the second air guide channel, the air outlet hole and the groove can form a communicating air path.

Further, the middle-seat piston is provided with a middle-seat piston ring along the circumference. By arranging the middle seat piston ring, the middle seat piston can be sealed, preventing leakage from affecting normal use.

Further, the valve body is a two-position five-way valve. The electromagnetic valve can be widely used on the mechanical devices of the factory to realize the control of the hydraulic flow direction.

Further, the pilot center seat is provided with several positioning posts, and the valve body is provided with positioning grooves matching with the positioning posts. By setting the positioning column and the positioning groove, the positioning between the pilot middle seat and the valve body is facilitated, and assembly is facilitated.

The utility model provides an electromagnetic valve. A valve body and a valve core are arranged on the electromagnetic valve, and a pilot middle seat and a miniature pilot valve are also arranged. The pilot middle seat is connected with the valve body, the end of the pilot middle seat close to the valve body is provided with a groove, and the middle seat piston for pushing the valve core is arranged in the groove. The pilot middle seat is provided with an air inlet and an air outlet. When the micro pilot valve is powered on, the air inlet, the internal cavity of the micro pilot valve, the air outlet and the groove can form a connected air passage.

When using this solenoid valve, after the miniature pilot valve is energized, the air intake hole, the internal cavity of the miniature pilot valve, the air outlet hole and the groove can form a connected air path. The inner cavity and air outlet of the valve flow into the groove, push the middle seat piston in the groove, and then push the valve core to realize the reversing of the valve core. After the miniature pilot valve is powered off, the spool resets.

Therefore, the electromagnetic valve provided by the utility model adopts a miniature pilot valve, optimizes the structure of the air circuit, has a smaller volume, and has a smaller operating pressure, and realizes that only a low-power coil can be used to open the miniature pilot valve, thereby realizing the reversing of the valve core. , so this solenoid valve reduces manufacturing costs, reduces energy consumption, saves energy, and reduces use costs. Moreover, while meeting the use requirements, the structure is optimized, the assembly is simple, and the qualified rate of assembly is improved.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following drawings will be briefly introduced in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained according to these drawings without creative work.

Fig. 1 is the structural representation of the electromagnetic valve that the utility model embodiment 1 provides;

Fig. 2 is the schematic structural view of the solenoid valve provided by Embodiment 2 of the present invention;

Fig. 3 is a structural schematic diagram of the miniature pilot valve and the pilot middle seat of the electromagnetic valve provided by Embodiment 2 of the utility model;

Fig. 4 is a schematic structural view of the middle-seat manual valve stem of the solenoid valve provided by Embodiment 2 of the present utility model;

Fig. 5 is a schematic diagram of the overall structure of the solenoid valve provided by Embodiment 2 of the present invention.

Summary of reference signs:

Valve body 101; valve core 102; positioning groove 103; return spring 104;

Pilot middle seat 201; Groove 202; Middle seat piston 203; Air intake hole 204; Air outlet hole 205; Passage 206; Middle seat manual valve stem 207; One air guide channel 211; the second air guide channel 212; the middle seat piston ring 213; the positioning column 214;

Miniature pilot valve 301; pilot valve seat 302; pilot valve moving iron core 303; pilot valve coil 304; air inlet 305; air outlet 306; air port 307.

Detailed ways

The inventor of the utility model found in the process of studying the solenoid valve that the pilot and coil parts of the existing solenoid valve are relatively large in volume, the pressure of the pilot moving iron core is relatively high, and a larger current is required to open the starting iron core, so the raw material is used Many, high coil power, high production cost; and the coil, pilot, pilot pressure plate, and pilot middle seat are all independent parts, which need to be connected one by one during assembly. There are many assembly processes, which are not only time-consuming but also easy to cause leakage.

In view of this, the inventor of the utility model has designed a solenoid valve with a miniature pilot valve 301, and a middle seat piston 203 is arranged in the groove 202 of the pilot middle seat 201, and the action of the middle seat piston 203 is controlled by the miniature pilot valve 301 After the miniature pilot valve 301 is energized, the air flows into the groove 202 from the air inlet 204, the inner cavity of the miniature pilot valve 301, and the air outlet 205 in sequence, pushing the middle seat piston 203 in the groove 202, and then pushing the valve core 102, realizing the reversing of the spool 102. Due to the use of the miniature pilot valve 301, this solenoid valve reduces manufacturing costs, energy consumption, energy consumption, and use costs; while meeting the requirements of use, the structure is optimized, the assembly is simple, and the assembly process is improved. Pass rate.

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Example 1

Fig. 1 is the schematic structural diagram of the solenoid valve provided by Embodiment 1 of the utility model; please refer to Fig. The spool 102 and the solenoid valve also include a pilot center seat 201 and a miniature pilot valve 301 . The pilot middle seat 201 is connected with the valve body 101 , and one end of the pilot middle seat 201 close to the valve body 101 is provided with a groove 202 , and a middle seat piston 203 for pushing the valve core 102 is arranged in the groove 202 . The pilot middle seat 201 is provided with an air inlet 204 and an air outlet 205. When the micro pilot valve 301 is powered on, the air inlet 204, the inner cavity of the micro pilot valve 301, the air outlet 205 and the groove 202 can form a connected Air passage.

The valve core 102 is provided with a return spring 104 at an end away from the middle seat piston 203 , and the return spring 104 is located between the valve core 102 and the valve body 101 . When the miniature pilot valve 301 is energized, the spool 102 moves under the push of the middle seat piston 203 and compresses the return spring 104; when the miniature pilot valve 301 is powered off, the return spring 104 resets the spool 102.

The micro pilot valve 301 is an existing pilot valve, which can realize the integration of the micro pilot valve 301 and the pilot valve coil 304, so that the overall volume of the micro pilot valve 301 is small, the operating pressure is small, and only a low power coil can be realized. Open the micro pilot valve 301.

When using this solenoid valve, when the miniature pilot valve 301 is energized, the air inlet 204, the inner cavity of the miniature pilot valve 301, the air outlet 205 and the groove 202 can form a connected air path, At this time, the air flows into the groove 202 from the air inlet 204, the inner cavity of the miniature pilot valve 301, and the air outlet 205 successively, and pushes the middle seat piston 203 in the groove 202, and then pushes the spool 102 to realize the movement of the spool 102. change direction. After the miniature pilot valve 301 is powered off, the spool 102 is reset.

Therefore, the electromagnetic valve provided by the utility model adopts the miniature pilot valve 301, optimizes the structure of the air circuit, has smaller volume, and lower operating pressure, and realizes that the miniature pilot valve 301 can be opened only with a low-power coil, thereby realizing the valve core. 102 reversing, so this solenoid valve reduces manufacturing costs, reduces energy consumption, saves energy, and reduces use costs. Moreover, while meeting the use requirements, the structure is optimized, the assembly is simple, and the qualified rate of assembly is improved.

Example 2

Fig. 2 is the schematic structural diagram of the solenoid valve provided by Embodiment 2 of the utility model; Fig. 5 is the overall structural schematic diagram of the solenoid valve provided by Embodiment 2 of the utility model; please refer to Fig. 2 and Fig. 5, the utility model embodiment 2 provides A solenoid valve is provided, which includes all the technical features of the solenoid valve provided in embodiment 1, and the solenoid valve provided in embodiment 2 also includes the following technical features:

Fig. 3 is a structural schematic diagram of the miniature pilot valve 301 and the pilot middle seat 201 of the electromagnetic valve provided by Embodiment 2 of the present utility model; please refer to Fig. The core 303 and the pilot valve coil 304 used to control the action of the pilot valve moving iron core 303 .

The pilot valve seat 302 is provided with an air inlet 305 and an air outlet 306, one end of the air inlet 305 communicates with the air inlet 204, the other end communicates with the inner cavity of the miniature pilot valve 301, and one end of the air outlet 306 communicates with the outlet. The air hole 205 is in communication, and the other end is provided with an air passage opening 307 that can communicate with the inner cavity of the miniature pilot valve 301 , and the pilot valve moving iron core 303 can close the air passage opening 307 .

When the pilot valve moving iron core 303 moves, the air inlet 204 , the air inlet 305 , the inner cavity of the miniature pilot valve 301 , the air outlet 306 , the air outlet 205 and the groove 202 can form a connected air path.

The micro pilot valve 301 is an existing pilot valve. This embodiment adopts a preferred structure of the micro pilot valve 301, which can realize the integration of the micro pilot valve 301 and the pilot valve coil 304, so that the overall volume of the micro pilot valve 301 Small size, low working pressure, only need low power coil to open the miniature pilot valve 301.

By setting the pilot valve seat 302, the pilot valve moving iron core 303 and the pilot valve moving iron core 303 on the miniature pilot valve 301, when the pilot valve moving iron core 303 is energized, the moving iron core moves to open the air passage port 307, so that The air inlet 204, the air inlet 305, the internal cavity of the miniature pilot valve 301, the air outlet 306, the air outlet 205 and the groove 202 can form a connected air path, so that the compressed air pushes the middle seat piston in the groove 202 203 , the middle seat piston 203 pushes the spool 102 to realize the reversing of the spool 102 .

Referring to Fig. 2, Fig. 3 and Fig. 5, the pilot middle seat 201 is provided with a passage 206 and a middle seat manual valve stem 207 which can close the air inlet hole 204 and the air outlet hole 205, and the middle seat manual valve stem 207 can slide in the passage 206 , the channel 206 communicates with the air inlet 204, the air inlet 305, the air outlet 205, and the air outlet 306 respectively.

By setting the middle seat manual valve rod 207, even if the compressed air does not pass through the miniature pilot valve 301 when no power is applied, the air inlet hole 204 can be communicated with the air outlet hole 205, thereby pushing the middle seat piston 203 and making the middle seat piston 203 Pushing the spool 102 realizes the reversing of the spool 102 . It is ensured that even if the miniature pilot valve 301 fails or the miniature pilot valve 301 cannot be energized, the reversing of the spool 102 can be realized through manual operation.

Figure 4 is a schematic structural view of the middle-seat manual valve stem 207 of the solenoid valve provided in Embodiment 2 of the present invention; please refer to Figure 4, the front end of the middle-seat manual valve stem 207 is provided with a first bump 208 for closing the air outlet 205 The rear end of the manual valve rod 207 in the middle seat is provided with a second protrusion 209 for closing the air inlet hole 204 .

By arranging the first protrusion 208 and the second protrusion 209 , the middle seat manual valve rod 207 can respectively close the air outlet hole 205 and the air inlet hole 204 .

Please refer to FIG. 4 , the first protrusion 208 and the second protrusion 209 are ring-shaped. Both the first protrusion 208 and the second protrusion 209 are ring-shaped, even if the middle seat manual valve stem 207 rotates axially during sliding, the first protrusion 208 and the second protrusion 209 can be well closed respectively. The air outlet hole 205 and the air inlet hole 204 are used to prevent leakage from affecting the reversing of the manual control spool 102 .

Please refer to FIG. 4 , both the first protruding block 208 and the second protruding block 209 are provided with an annular groove, and an elastic member 210 is disposed in the annular groove. By arranging the elastic member 210 , while realizing the sliding of the middle-seat manual valve stem 207 , it can well play a role of sealing, and avoid leakage that affects the reversing of the manual control valve core 102 .

Please refer to Fig. 3, as a preference, the pilot middle seat 201 of the solenoid valve provided in this embodiment is provided with a first air guide channel 211 at a position corresponding to the position between the first bump 208 and the second bump 209, the first guide Both ends of the air channel 211 communicate with the channel 206 and the inlet channel 305 respectively.

The position of the pilot middle seat 201 corresponding to the front end of the middle seat manual valve stem 207 is provided with a second air guide channel 212 , and the two ends of the second air guide channel 212 communicate with the channel 206 and the air outlet channel 306 respectively.

Normally, the distance between the first bump 208 and the second bump 209 of the middle seat manual valve stem 207 is equal to the distance between the air outlet hole 205 and the air inlet hole 204, and the middle seat manual valve stem 207 is When sliding in the channel 206, the first protrusion 208 and the second protrusion 209 can respectively close the air outlet 205 and the air inlet 204 at the same time, by setting the first air guide 211 and the second air guide 212, the middle seat can be manually When valve stem 207 slides in channel 206, as shown in the arrow direction among Fig. , the air outlet channel 306 , the second air guide channel 212 , the air outlet hole 205 and the groove 202 can form a connected air channel.

Please refer to FIG. 3 , the middle seat piston 203 is provided with a middle seat piston ring 213 along the circumferential direction. By arranging the middle seat piston ring 213, the middle seat piston 203 can be sealed to avoid leakage affecting normal use.

The valve body 101 is a two-position five-way valve. So that the solenoid valve can be widely used on the mechanical device of the factory to realize the control of the hydraulic flow direction.

Please refer to FIG. 3 and FIG. 5 , the pilot center seat 201 is provided with a number of positioning posts 214 , and the valve body 101 is provided with a positioning slot 103 matching with the positioning posts 214 . By setting the positioning column 214 and the positioning groove 103, the positioning between the pilot middle seat 201 and the valve body 101 is facilitated, and assembly is facilitated.

The solenoid valve provided in this embodiment adopts the miniature pilot valve 301. When the pilot valve coil 304 is energized, the internal air of the air inlet 204, the passage 206, the first air guide channel 211, the air intake channel 305, and the miniature pilot valve 301 The cavity, the air outlet channel 306 , the second air guide channel 212 , the air outlet hole 205 and the groove 202 can form a connected air passage, and then the middle seat piston 203 pushes the valve core 102 to realize the valve core 102 reversing. The solenoid valve provided in this embodiment has an optimized gas circuit structure, smaller volume, and lower operating pressure, and realizes that only a low-power coil can be used to open the miniature pilot valve 301, thereby realizing the reversing of the valve core 102. Therefore, this solenoid valve The manufacturing cost is reduced, the energy consumption is reduced, the energy is saved, and the use cost is reduced; while the use requirement can be met, the structure is optimized, the assembly is simple, and the qualified rate of assembly is improved.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. A solenoid valve, comprising a valve body and a valve core arranged inside the valve body, characterized in that, the solenoid valve also includes a pilot middle seat and a miniature pilot valve; The pilot middle seat is connected to the valve body, a groove is arranged at one end of the pilot middle seat close to the valve body, and a middle seat piston for pushing the valve core is arranged in the groove; The pilot middle seat is provided with an air inlet and an air outlet. When the miniature pilot valve is powered on, the air inlet, the inner cavity of the miniature pilot valve, the air outlet and the groove A connected gas path can be formed. 2. The solenoid valve according to claim 1, wherein the miniature pilot valve comprises a pilot valve seat, a pilot valve moving iron core, and a pilot valve coil for controlling the action of the pilot valve moving iron core; The valve seat of the pilot valve is provided with an air inlet and an air outlet, one end of the air inlet communicates with the air inlet, and the other end communicates with the inner cavity of the miniature pilot valve, and the outlet of the air One end communicates with the air outlet, and the other end is provided with an air passage opening that can communicate with the inner cavity of the miniature pilot valve, and the moving iron core of the pilot valve can close the air passage opening; When the moving iron core of the pilot valve moves, the air inlet, the air inlet, the internal cavity of the miniature pilot valve, the air outlet, the air outlet and the groove can form a communication air path. 3. The solenoid valve according to claim 2, wherein the pilot middle seat is provided with a channel and a middle seat manual valve stem that can close the air inlet hole and the air outlet hole, and the middle seat manual valve The rod can slide in the channel, and the channel communicates with the air inlet hole, the air inlet channel, the air outlet hole and the air outlet channel respectively. 4. The solenoid valve according to claim 3, wherein the front end of the middle seat manual valve stem is provided with a first bump for closing the air outlet, and the rear end of the middle seat manual valve stem is provided with a There is a second projection for closing the air inlet hole. 5 . The solenoid valve according to claim 4 , wherein both the first protrusion and the second protrusion are ring-shaped. 6 . 6 . The solenoid valve according to claim 5 , wherein the first protrusion and the second protrusion are both provided with an annular groove, and an elastic member is disposed in the annular groove. 6 . 7. The solenoid valve according to claim 4, characterized in that, the pilot middle seat is provided with a first air guide channel at a position corresponding to the position between the first bump and the second bump, so Both ends of the first air guiding channel communicate with the passage and the air inlet respectively; The position of the pilot middle seat corresponding to the front end of the manual valve rod of the middle seat is provided with a second air guide channel, and the two ends of the second air guide channel communicate with the channel and the air outlet channel respectively. 8 . The electromagnetic valve according to claim 1 , wherein the middle seat piston is provided with a middle seat piston ring along the circumferential direction. 9. The electromagnetic valve according to any one of claims 1-8, wherein the valve body is a two-position five-way valve. 10. The solenoid valve according to any one of claims 1-8, characterized in that, the pilot middle seat is provided with several positioning posts, and the valve body is provided with positioning grooves matching with the positioning posts.