Two-position three-way miniature quick-response high-temperature-resistant electromagnetic valve

Abstract

The utility model relates to a two-position three-way miniature quick-response high-temperature-resistant electromagnetic valve, which effectively solves the problems that the working area of an electromagnet is close to the area of a flowing medium, and the electromagnet is easily damaged in a high-temperature environment at the high temperature of about 300 DEG C, so that a valve body cannot work normally, and the like. Comprising a fluid shell, an electromagnetic shell is arranged below the fluid shell, a strong electromagnet is coaxially fixed in the electromagnetic shell, a fixed iron core is coaxially fixed to the top of the electromagnetic shell, and the end, away from the electromagnetic shell, of the fixed iron core is fixedly connected with the bottom of the fluid shell; a heat dissipation channel is formed between the electromagnetic shell and the fluid shell; through the arrangement of the electromagnetic shell, the fluid shell, the heat dissipation channel and the like, high-temperature gas and the powerful electromagnet are separated, so that a split structure is formed, the heat dissipation channel can reduce the influence of high temperature on the powerful electromagnet to a great extent, and the situation that the powerful electromagnet cannot work normally due to damage in a high-temperature environment is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to a two-way three-way micro quick-response high-temperature-resistant solenoid valve. Background Art

[0002] A solenoid valve is an industrial device controlled by electromagnetism. It is a basic automation component for controlling fluids and belongs to an actuator, not limited to hydraulic and pneumatic applications. It is used in industrial control systems to adjust the direction, flow rate, speed, and other parameters of the medium. The solenoid valve can cooperate with different circuits to achieve the expected control, and both the control accuracy and flexibility can be ensured.

[0003] Chinese Patent with application number CN202221026824.2 discloses an ultra-high temperature and high pressure large flow rate rapid response solenoid valve, which includes a movable spool assembly, a magnetic isolation tube assembly, and a coil assembly. The movable spool assembly includes a central tube, an upper movable iron core, and a lower movable iron core, and a magnetic isolation ring is installed between the upper movable iron core and the lower movable iron core; the magnetic isolation tube assembly includes an upper fixed iron core arranged opposite to the upper movable iron core and a lower fixed iron core arranged opposite to the lower movable iron core; the coil assembly includes an upper coil corresponding to the upper movable iron core, a lower coil corresponding to the lower movable iron core, and a first magnetic conduction plate and a second magnetic conduction plate arranged on both sides of the lower coil. A magnetic isolation part is installed between the upper coil and the lower coil, and a third magnetic conduction plate is arranged at the lower end of the upper coil. The first magnetic conduction plate and the third magnetic conduction plate are respectively located on both sides of the magnetic isolation part; the ultra-high temperature and high pressure large flow rate rapid response solenoid valve provided by the utility model overcomes the defects of long opening and closing response time and inapplicability to high temperature and high pressure environments of the existing solenoid valves.

[0004] The existing high-temperature-resistant solenoid valves still have the following problems:

[0005] 1. The working area of the electromagnet is relatively close to the area of the flowing medium. At a high temperature of about 300 degrees, the electromagnet is easily damaged in the high-temperature environment, resulting in the valve body being unable to work properly.

[0006] 2. Due to the high-temperature environment, the power-on time of the solenoid valve is relatively short, generally about ten minutes, greatly reducing the universality of the solenoid valve. Summary of the Utility Model

[0007] In view of the above problems, the utility model provides a two-way three-way micro quick-response high-temperature-resistant solenoid valve, which has the advantages of compact structure, non-interference between the electromagnet and the operating medium, and long power-on time of the solenoid valve.

[0008] The technical solution it adopts is that the utility model includes a fluid housing, an electromagnetic housing is arranged below the fluid housing, a powerful electromagnet is coaxially fixed inside the electromagnetic housing, a fixed iron core is coaxially fixed at the top of the electromagnetic housing, one end of the fixed iron core away from the electromagnetic housing is fixedly connected to the bottom of the fluid housing, and a heat dissipation channel is formed between the electromagnetic housing and the fluid housing;

[0009] A cavity is opened inside the fluid housing, an air inlet pipe communicating with the cavity is fixed at the top of the fluid housing, a load pipe communicating with the cavity is fixed on one side of the fluid housing, a connecting block is coaxially arranged inside the cavity, a through hole communicating with the air inlet pipe is penetrated inside the connecting block, the through hole is divided into a movable part and a connecting part, the diameter of the movable part is larger than that of the connecting part, a first flow channel is formed between the through hole and the air inlet pipe, an air groove penetrating through the fluid housing and communicating with the load pipe is opened on the side wall of the connecting block, and a second flow channel is formed between the air groove and the load pipe;

[0010] A sliding groove is penetrated through the bottom of the cavity, a rolling ball moving up and down is arranged inside the movable part, the diameter of the rolling ball is larger than those of the connecting part and the sliding groove, a push rod is slidably connected inside the sliding groove, the push rod is connected with the fixed iron core through a spring, one end of the push rod penetrating through the fixed iron core is located inside the electromagnetic housing, the push rod is coaxially arranged with the electromagnetic housing, a movable iron core sliding up and down is coaxially arranged inside the electromagnetic housing, an activity gap is spaced between the movable iron core and the fixed iron core, a connecting pipe is fixedly connected to one side of the fluid housing away from the load pipe, an air hole communicating with the connecting pipe is penetrated through one side of the sliding groove, and a third flow channel is formed between the connecting pipe and the air hole.

[0011] Preferably, a needle head is coaxially fixed at the top of the push rod, and the maximum diameter of the cross section of the needle head is smaller than the diameter of the push rod.

[0012] Preferably, a placement groove is coaxially opened at the top of the fixed iron core, a connecting disk is coaxially fixed on the push rod, and the connecting disk is connected with the fluid housing through a spring.

[0013] Preferably, a plurality of heat dissipation grooves are penetrated through the side wall of the placement groove and are evenly distributed in a circumferential manner, and the placement groove is communicated with the heat dissipation channel through the heat dissipation grooves.

[0014] Preferably, a filter screen is coaxially arranged between the connecting pipe and the air hole.

[0015] Preferably, a fixing plate is coaxially fixed at the bottom of the electromagnetic housing, a plurality of connecting holes are opened on the fixing plate, and a plurality of through grooves are evenly distributed in a circumferential manner and are opened on the side wall of the movable iron core.

[0016] Preferably, the ejector rod includes a sliding portion and a supporting portion. The sliding portion is located at the upper position of the ejector rod and slides in the sliding groove. The diameter of the sliding portion is larger than that of the supporting portion. A plurality of circumferential overflow grooves are formed through the sliding portion and the connecting disc.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. Through the settings of the electromagnetic housing, the fluid housing, and the heat dissipation channels, etc., the high-temperature gas and the powerful electromagnet are separated, thus forming a split structure. The heat dissipation channels can greatly reduce the influence of high temperature on the powerful electromagnet, avoiding damage to the powerful electromagnet in a high-temperature environment and preventing it from working properly.

[0019] 2. Through the settings of the ejector rod, the ball bearings, and the powerful electromagnet, etc., not only the electromagnetic control area is separated from the medium flow area to avoid the influence of high temperature on the operation of the powerful electromagnet, but also the valve body has the advantages of lighter weight, smaller external dimensions, and more compact structure.

[0020] 3. Through the settings of the placement groove and the connecting disc, etc., the ejector rod adopts a balanced structure design. Compared with the traditional method of placing the spring at the end of the ejector rod, this design makes the sliding balance of the ejector rod stronger, can minimize the problems brought by assembly to the ejector rod. At the same time, the electromagnetic force for the up and down movement of the ejector rod is smaller, the coil current is small, the heat generation is small, and the energization time of the solenoid valve is longer.

[0021] 4. Through the settings of the heat dissipation grooves and the placement grooves, etc., the leaked trace gas directly enters the external air through the placement groove and the heat dissipation groove, avoiding the problem of the electromagnetic housing heating up. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a perspective view of the present utility model.

[0023] Figure 2 is a perspective sectional view of the present utility model.

[0024] Figure 3 is in the present utility model Figure 2 is an enlarged schematic view of the structure at A in

[0025] Figure 4 is a perspective sectional view of the fixed iron core in the present utility model.

[0026] Figure 5 is a perspective view of the ejector rod in the present utility model.

[0027] Figure 6 is a schematic view of the fixed plate in the present utility model.

[0028] Figure 7It is a three-dimensional schematic diagram of the moving iron core in the present utility model.

[0029] Explanation of the reference numerals in the schematic diagram:

[0030] 1. Fluid housing; 2. Electromagnetic housing; 3. Fixed iron core; 4. Heat dissipation channel; 5. Intake pipe; 6. Load pipe; 7. Connecting block; 8. Through hole; 9. Movable part; 10. Connecting part; 11. Air groove; 12. Slide groove; 13. Ball; 14. Push rod; 15. Moving iron core; 16. Connecting pipe; 17. Air hole; 18. Needle; 19. Placing groove; 20. Connecting plate; 21. Heat dissipation groove; 22. Filter screen; 23. Fixed plate; 24. Connecting hole; 25. Through slot; 26. Sliding part; 27. Supporting part; 28. Overflow groove; 29. Powerful electromagnet. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] As shown by Figures 1 to 5 it includes a fluid housing 1, and an electromagnetic housing 2 is provided below the fluid housing 1. It should be noted that the moving medium in the fluid housing 1 is high-temperature gas, and the temperature reaches about 330 °C. A powerful electromagnet 29 is coaxially fixed in the electromagnetic housing 2. The powerful electromagnet 29 is externally connected to a control device, and the control device includes a control module. A fixed iron core 3 is coaxially fixed at the top of the electromagnetic housing 2. One end of the fixed iron core 3 away from the electromagnetic housing 2 is fixedly connected to the bottom of the fluid housing 1. A heat dissipation channel 4 is formed between the electromagnetic housing 2 and the fluid housing 1. Through the settings of the electromagnetic housing 2, the fluid housing 1, and the heat dissipation channel 4, etc., the high-temperature gas and the powerful electromagnet 29 are separated to form a split structure. The heat dissipation channel 4 can greatly reduce the high-temperature influence on the powerful electromagnet 29 and prevent the powerful electromagnet 29 from being damaged in a high-temperature environment and unable to work properly;

[0033] To further supplement the interior of the fluid housing 1, a cavity is provided inside the fluid housing 1. An intake pipe 5 communicating with the cavity is fixed to the top of the fluid housing 1, and a load pipe 6 communicating with the cavity is fixed to one side of the fluid housing 1. A connecting block 7 is coaxially arranged inside the cavity. A through hole 8 communicating with the intake pipe 5 is penetrated through the connecting block 7. High-temperature gas enters the through hole 8 through the intake pipe 5. The through hole 8 is divided into a movable part 9 and a connecting part 10. The diameter of the movable part 9 is larger than that of the connecting part 10. The through hole 8 and the intake pipe 5 form a first flow path. An air groove 11 penetrating through the fluid housing 1 and communicating with the load pipe 6 is provided on the side wall of the connecting block 7. The air groove 11 and the load pipe 6 form a second flow path. When the first flow path and the second flow path are communicated, the high-temperature gas enters the load pipe 6 through the first flow path, the through hole 8 and the second flow path. It should be noted that the areas through which the high-temperature gas flows are all made of superalloy material. In this embodiment, the superalloy of GH4169 model is adopted;

[0034] A sliding groove 12 is penetrated through the bottom of the cavity. A rolling ball 13 that moves up and down is arranged inside the movable part 9. The diameter of the rolling ball 13 is larger than that of the connecting part 10 and the sliding groove 12. A push rod 14 is slidably connected inside the sliding groove 12. The push rod 14 is connected to the fixed iron core 3 through a spring. When the powerful electromagnet 29 is not powered on, the rolling ball 13 is located below the movable part 9 to seal the sliding groove 12. At this time, the first flow path and the second flow path are communicated. The rolling ball 13 has stronger sealing performance for the sliding groove 12 under the action of air pressure. There is a certain gap between the push rod 14 and the rolling ball 13, and the two do not directly contact. One end of the push rod 14 penetrating through the fixed iron core 3 is located inside the electromagnetic housing 2. The push rod 14 is coaxially arranged with the electromagnetic housing 2. A movable iron core 15 that slides up and down is coaxially arranged inside the electromagnetic housing 2. There is an active gap between the movable iron core 15 and the fixed iron core 3. A connecting pipe 16 is fixedly connected to the side of the fluid housing 1 away from the load pipe 6. An air hole 17 communicating with the connecting pipe 16 is penetrated through one side of the sliding groove 12. The connecting pipe 16 and the air hole 17 form a third flow path. When the powerful electromagnet 29 is powered on, the movable iron core 15 pushes the push rod 14 to move upward against the elastic force of the spring. The rolling ball 13 moves along with the thrust of the push rod 14. At this time, the rolling ball 13 seals the first flow path, and the second flow path and the third flow path are communicated. In this embodiment, the third flow path is mainly connected to the outside air. When the load connected to the load pipe 6 needs to be depressurized or pressurized, after the second flow path and the third flow path are communicated, the air pressure in the load device is discharged to the outside air, or the outside air enters the load device through the third flow path and the second flow path. Through the settings of the push rod 14, the rolling ball 13 and the powerful electromagnet 29, etc., not only the electromagnetic control area is separated from the medium flow area to avoid the high temperature affecting the operation of the powerful electromagnet 29, but also, it has the advantages of lighter weight of the valve body, smaller external dimensions and more compact structure.

[0035] Reference Figure 5 As shown, in order to prevent the ejector rod 14 from affecting the flow rate of the high-temperature gas in the cavity, a needle 18 is coaxially fixed to the top of the ejector rod 14. The maximum diameter of the cross-section of the needle 18 is smaller than the diameter of the ejector rod 14. When the ejector rod 14 moves upward to push the ball 13 to close the first flow channel, the needle 18 does not affect the connection between the second flow channel and the third flow channel.

[0036] Reference Figure 4 and Figure 5 As shown, in actual production and manufacturing, for the electromagnetic housing 2 and the fluid housing 1, special attention needs to be paid to the regularity of the assembly between the two housings during assembly. Especially when the fluid housing 1 and the electromagnetic housing 2 are bolted together, the deviation and height of the bolts will affect the sliding smoothness of the ejector rod 14 in the fluid housing 1. In order to minimize the impact of assembly on the ejector rod 14 to the greatest extent, a placement groove 19 is coaxially opened at the top of the fixed iron core 3. A connection disk 20 is coaxially fixed on the ejector rod 14. The connection disk 20 is connected to the fluid housing 1 through a spring. Through the settings such as the placement groove 19 and the connection disk 20, the ejector rod 14 adopts a balanced structure design. Compared with the traditional method of placing the spring at the end of the ejector rod 14, this design makes the sliding balance of the ejector rod 14 stronger and can minimize the problems brought by assembly to the ejector rod 14 to the greatest extent.

[0037] Reference Figure 4 As shown, considering that the method of only using the ball 13 to seal the chute 12 will still leak a small amount of gas, in order to prevent this part of the gas from affecting the powerful electromagnet 29, a plurality of circumferentially evenly distributed heat dissipation grooves 21 are penetrated through the side wall of the placement groove 19. The placement groove 19 is communicated with the heat dissipation channel 4 through the heat dissipation grooves 21. Through the settings such as the heat dissipation grooves 21 and the placement groove 19, the leaked small amount of gas directly enters the external air through the placement groove 19 and the heat dissipation grooves 21, avoiding the problem of the electromagnetic housing 2 heating up.

[0038] Reference Figure 2 As shown, in order to prevent a large amount of dust and other impurities from being carried when the external air enters the valve body, which will affect the sealing performance of the ball 13 in the long run, a filter screen 22 is coaxially arranged between the connecting pipe 16 and the air hole 17. In this embodiment, the filter screen 22 adopts a three-layer sintered mesh.

[0039] Reference Figure 6 and Figure 7As shown, considering that when the moving iron core 15 moves up and down, it will have a compressive action on the air. If the movement area of the moving iron core 15 is completely enclosed, after the moving iron core 15 moves to a certain height, the gas cannot be compressed, making the ejector rod 14 unable to drive the ball 13 to close the first flow channel. To avoid the above situation, a fixed plate 23 is coaxially fixed at the bottom of the electromagnetic housing 2. A plurality of connection holes 24 are formed in the fixed plate 23. A plurality of through grooves 25 are circumferentially and uniformly arranged on the side wall of the moving iron core 15. Through the settings of the fixed plate 23, the connection holes 24 and the through grooves 25, when the moving iron core 15 moves up and down, the gas in its moving area is always connected to the outside air, and there is no problem that the ejector rod 14 cannot drive the ball 13 to close the first flow channel.

[0040] Reference Figure 5 As shown, what further supplements the structure of the ejector rod 14 is that the ejector rod 14 includes a sliding portion 26 and a supporting portion 27. The sliding portion 26 is located at the upper position of the ejector rod 14 and slides in the sliding groove 12. The diameter of the sliding portion 26 is larger than that of the supporting portion 27. A plurality of circumferential overflow grooves 28 are formed through the sliding portion 26 and the connection disk 20. Through the settings of the sliding portion 26, the supporting portion 27 and the overflow grooves 28, the high-temperature gas overflowing is further connected to the atmosphere to prevent it from affecting the operation of the powerful electromagnet 29.

[0041] When the present utility model is in use:

[0042] First, when the powerful electromagnet 29 is not energized, the ball 13 is located below the movable portion 9 to seal the sliding groove 12. At this time, the first flow channel and the second flow channel are connected. The ball 13 has a stronger sealing property for the sliding groove 12 under the action of air pressure. There is a certain gap between the ejector rod 14 and the ball 13, and the two do not directly contact.

[0043] Then, when the powerful electromagnet 29 is energized, the moving iron core 15 pushes the ejector rod 14 to move upward against the elastic force of the spring. The ball 13 moves along with the thrust of the ejector rod 14. At this time, the ball 13 seals the first flow channel, and the second flow channel and the third flow channel are connected.

[0044] Finally, the trace amount of gas leaked through the sliding groove 12 directly enters the outside air through the placement groove 19 and the heat dissipation groove 21.

[0045] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A two-position three-way miniature fast-response high-temperature resistant solenoid valve, comprising a fluid housing (1), characterized in that: An electromagnetic housing (2) is arranged below the fluid housing (1), a strong electromagnet (29) is coaxially fixed inside the electromagnetic housing (2), a fixed iron core (3) is coaxially fixed on the top of the electromagnetic housing (2), one end of the fixed iron core (3) away from the electromagnetic housing (2) is fixedly connected to the bottom of the fluid housing (1), and a heat dissipation channel (4) is formed between the electromagnetic housing (2) and the fluid housing (1); A cavity is provided inside the fluid housing (1); an air intake pipe (5) communicating with the cavity is fixed on the top of the fluid housing (1); a load pipe (6) communicating with the cavity is fixed on one side of the fluid housing (1); a connecting block (7) is coaxially arranged in the cavity; a through hole (8) communicating with the air intake pipe (5) is provided in the connecting block (7); the through hole (8) is divided into a movable part (9) and a connecting part (10); the diameter of the movable part (9) is larger than the diameter of the connecting part (10); the through hole (8) and the air intake pipe (5) form a first flow channel; an air groove (11) penetrating the fluid housing (1) and communicating with the load pipe (6) is provided on the side wall of the connecting block (7); the air groove (11) and the load pipe (6) form a second flow channel; A slide groove (12) is provided through the bottom of the cavity, a ball (13) movable up and down is provided in the movable part (9), the diameter of the ball (13) is larger than the diameter of the connecting part (10) and the slide groove (12), a push rod (14) is slidably connected in the slide groove (12), the push rod (14) is connected to the fixed iron core (3) through a spring, one end of the push rod (14) passes through the fixed iron core (3) and is located in the electromagnetic housing (2), and the push rod (14) is connected to the fixed iron core (3). The electromagnetic housing (2) is coaxially arranged, a movable iron core (15) is coaxially arranged inside the electromagnetic housing (2) and slides up and down, the movable iron core (15) and the fixed iron core (3) are separated by a movable gap, a connecting pipe (16) is fixedly connected to the side of the fluid housing (1) away from the load tube (6), an air hole (17) connected to the connecting pipe (16) is penetrated through one side of the slide groove (12), and the connecting pipe (16) and the air hole (17) form a third flow channel.

2. The two-position three-way miniature fast-response high-temperature resistant solenoid valve according to claim 1 is characterized in that: A needle (18) is coaxially fixed to the top of the push rod (14), and the maximum diameter of the cross section of the needle (18) is smaller than the diameter of the push rod (14).

3. The two-position three-way miniature fast-response high-temperature resistant solenoid valve according to claim 2 is characterized in that: A placement groove (19) is coaxially provided on the top of the fixed iron core (3), a connecting plate (20) is coaxially fixed on the top rod (14), and the connecting plate (20) is connected to the fluid housing (1) via a spring.

4. The two-position three-way miniature fast-response high-temperature resistant solenoid valve according to claim 3 is characterized in that: A plurality of heat dissipation grooves (21) evenly distributed around the circumference are formed through the side wall of the placement groove (19), and the placement groove (19) is connected to the heat dissipation channel (4) through the heat dissipation grooves (21).

5. The two-position three-way miniature fast-response high-temperature resistant solenoid valve according to claim 4 is characterized in that: A filter screen (22) is coaxially arranged between the connecting pipe (16) and the air hole (17).

6. The two-position three-way miniature fast-response high-temperature resistant solenoid valve according to claim 5 is characterized in that: A fixing plate (23) is coaxially fixed to the bottom of the electromagnetic housing (2), a plurality of connection holes (24) are provided on the fixing plate (23), and a plurality of through slots (25) evenly distributed around the circumference are provided on the side wall of the moving iron core (15).

7. The two-position three-way miniature fast-response high-temperature resistant solenoid valve according to claim 6 is characterized in that: The push rod (14) comprises a sliding portion (26) and a supporting portion (27); the sliding portion (26) is located at an upper position of the push rod (14) and slides in the slide groove (12); the diameter of the sliding portion (26) is greater than the diameter of the supporting portion (27); and a plurality of circumferential overflow grooves (28) are provided through the sliding portion (26) and the connecting plate (20).

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