A solenoid valve operation detecting mechanism

Abstract

The utility model belongs to electromagnetic valve action observation technical field discloses a kind of electromagnetic valve action detection mechanism, including magnetism sheet, swing arm, magnet, positioning shaft and torsion spring, positioning shaft is installed between diaphragm and valve cover in the peripheral of moving iron core, the middle part of swing arm is rotatably connected on positioning shaft, positioning shaft is installed on valve cover, torsion spring is sleeved in positioning shaft outside, one end of torsion spring is connected or abuts with valve cover, the other end of torsion spring is connected or abuts with one end of swing arm;The other end of swing arm is the magnet end with magnet embedded, magnetism sheet is embedded in the outer surface of valve cover, the edge of upper sheet metal part is correspondingly arranged with swing arm between magnet end and positioning shaft, when electromagnetic valve is powered on, upper sheet metal part moves upwards with diaphragm and can abut on swing arm, so that magnet end of swing arm swings upwards and cooperates with magnetism sheet to show magnetism.The utility model can observe the action of electromagnetic valve outside electromagnetic valve, without breaking through airtight cavity, without doing additional sealing design.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic valve action observation technology, specifically relating to an electromagnetic valve action detection mechanism. Background Technology

[0002] A solenoid valve is a basic automated component that uses electromagnetic principles to control the on / off state or flow direction of fluids (gas or liquid). Its core function is to drive the valve core to move by switching the solenoid coil on and off, thereby changing the fluid path and achieving precise control of actuators (such as cylinders and valves).

[0003] Currently, the valve position detection of solenoid valves is usually achieved through the following main methods: 1. Mechanical contact or pneumatic pressure can be used to push, rotate, or lift the marker, allowing the action signal to be directly observed. However, this type of detection requires complex mechanical design, increases the risk of leakage, and can only be used for indirect measurement and switching measurement. 2. Installing sensors requires external circuitry and is often used in conjunction with indicator lights. This increases the requirements for wiring and is not suitable for those who want to simply observe the operation of solenoid valves but cannot avoid unnecessary wiring.

[0004] As can be seen from the above, the existing solenoid valve action detection technology still has many shortcomings and needs to be further improved. Utility Model Content

[0005] The purpose of this invention is to provide a solenoid valve action detection mechanism to solve the above-mentioned problems existing in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A solenoid valve action detection mechanism includes a display magnetic plate, a swing arm, a magnet, a positioning shaft, and a torsion spring. The positioning shaft is installed between the diaphragm and the valve cover around the moving iron core. The middle part of the swing arm is rotatably connected to the positioning shaft, which is installed on the valve cover. The torsion spring is sleeved on the outside of the positioning shaft. One end of the torsion spring is connected to or abuts against the valve cover, and the other end of the torsion spring is connected to or abuts against one end of the swing arm, so that the other end of the swing arm moves away from the valve cover in its natural state by means of the spring force of the torsion spring. The other end of the swing arm is a magnet end with an embedded magnet. The display magnetic plate is embedded in the outer surface of the valve cover. The edge of the upper sheet metal part is correspondingly arranged with the swing arm between the magnet end and the positioning shaft. When the solenoid valve is energized, the upper sheet metal part moves upward with the diaphragm and can abut against the swing arm, so that the magnet end of the swing arm swings upward and approaches the display magnetic plate, and the display magnetic plate becomes magnetic under the action of the magnet's magnetic field.

[0007] As a preferred technical solution of this utility model, the inner top surface of the valve cover is provided with a downwardly extending positioning block, and the positioning shaft is installed at the lower part of the positioning block.

[0008] As a preferred technical solution of this utility model, the lower end of the positioning block is cut with a mounting groove, the middle part of the positioning shaft is set in the mounting groove, and threaded grooves are matched on both sides of the middle part of the mounting groove. The threaded grooves are threadedly connected with positioning bolts that abut against the lower end of the positioning shaft.

[0009] In a preferred embodiment of this invention, the diameter of the threaded portion of the positioning bolt is greater than the width of the mounting groove.

[0010] As a preferred technical solution of this utility model, the positioning bolt is a plastic bolt.

[0011] As a preferred technical solution of this utility model, one end of the swing arm is sleeved on the outside of the positioning block, and the positioning shaft is inserted into one end of the swing arm.

[0012] As a preferred technical solution of this utility model, one end of the swing arm is a U-shaped frame, which is sleeved on the outside of the positioning block. The positioning shaft is inserted into the middle of the U-shaped frame, and a limit shaft is inserted into the opening of the U-shaped frame. The limit shaft is located on the side of the positioning block away from the magnetic plate. When the solenoid valve is not working, the upper end of the limit shaft abuts against the positioning block.

[0013] As a preferred technical solution of this utility model, one end of the torsion spring is connected to or abuts against the other side of the positioning block, and the other end of the torsion spring is connected to or abuts against the limiting shaft.

[0014] As a preferred technical solution of this utility model, when the solenoid valve is not working, one end of the swing arm is set horizontally, and the other end of the swing arm extends downward at an angle.

[0015] As a preferred technical solution of this utility model, the valve cover is made of non-magnetic material.

[0016] Beneficial effects: When the solenoid valve of this invention is energized, the coil generates magnetic force, causing the moving iron core to rise. The medium in the upper chamber enters the valve seat inlet through the crater, allowing the medium to flow out along the valve body outlet channel. As the pressure in the upper chamber decreases, a differential pressure is created between the upper chamber above the diaphragm and the annular outer channel, causing the diaphragm to bend upward and return to its original position. This causes the upper sheet metal part to move upward, lifting the magnet end of the swing arm. This brings the magnet inside the magnet end closer to the display plate, causing a pattern to appear on the display plate, indicating that the solenoid valve is in the open state. When the solenoid valve is de-energized, the coil magnetic force disappears, the pressure above the diaphragm stops, the pressure in the upper chamber recovers, and the diaphragm returns to its original position under the action of the moving iron core and spring, blocking the medium through the air inlet. The torsion spring relaxes, causing the magnet end of the swing arm to descend and press against the upper sheet metal part. The magnet moves downward, the magnetic field leaves the display plate, and the pattern on the display plate disappears, indicating that the solenoid valve has returned to the closed state.

[0017] This invention utilizes a linkage mechanism formed by a swing arm to extend the movement of moving parts within the valve, which directly reflects the valve's action, into a movement that is easier to detect. Based on this, it leverages the property of magnets and a display plate that are unaffected by the shell wall to transmit information to the outside, transforming it into a signal recognizable by humans and sensors. By observing the solenoid valve's action from the outside, users can determine the valve's open / closed state by observing the pattern on the display plate, eliminating the need for sound or vibration detection. This achieves electromagnetic action detection without requiring the opening of a sealed cavity or additional sealing design, reducing the design complexity and failure risk associated with adding functionality. This invention also utilizes the cross-domain application of the display plate, expanding its use to observe the operation of solenoid valves. Furthermore, it employs a non-mechanical, non-contact measurement method, ensuring high reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 for Figure 2 An enlarged schematic diagram of part A in the middle; Figure 4 This is a partial structural schematic diagram of the present invention; Figure 5 for Figure 4 Enlarged schematic diagram of part B; Figure 6 This is a schematic diagram of an existing solenoid valve. Figure 7 This is a cross-sectional view of an existing solenoid valve. Detailed Implementation

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0020] like Figure 6 and Figure 7As shown, the existing diaphragm solenoid valve structure generally includes a valve body 1 and a valve cover 2 sealed and installed on the upper end of the valve body 1. The valve body 1 and the valve cover 2 are connected by a diaphragm 3, which divides the interior of the solenoid valve into an upper chamber between the diaphragm 3 and the valve cover 2, and a lower chamber between the diaphragm 3 and the valve body 1. The valve seat has a valve body inlet channel 101 and a valve body outlet channel 102 at both ends. The inlet of the valve body outlet channel 102 is the valve seat inlet 103 located below the central axis of the diaphragm 3. The outlet of the valve body inlet channel 101 is an annular outer channel 104 surrounding the valve seat inlet 103. The edge of the diaphragm 3 corresponding to the annular outer channel 104 is provided with an air inlet 301 connecting the annular outer channel 104 and the upper chamber. A crater 4 connecting the upper and lower chambers is installed at the central axis of the diaphragm 3 above the valve seat inlet 103. A moving iron core 6 located below the stationary iron core 5 is installed inside the valve cover 2 above the crater 4. The moving iron core 6 is abutted against the stationary iron core 5, which is equipped with a magnetic ring, by a spring 7.

[0021] When the solenoid valve is not working, the spring force of the spring 7 will push the moving iron core 6 downward, thereby sealing the upper end of the crater 4. At the same time, the diaphragm 3 will bend downward and block the valve seat inlet 103. At this time, the medium in the valve body inlet channel 101 enters the upper chamber through the air inlet 301, so that the pressure in the upper chamber and the valve body inlet channel 101 are balanced.

[0022] When the solenoid valve is energized, the stationary iron core 5 attracts the moving iron core 6 to move upward and compresses the spring 7, causing the moving iron core 6 to disengage from the crater 4. This allows the upper chamber above the crater 4 to connect to the valve seat inlet 103 via the crater 4, allowing the medium to flow out along the valve body outlet channel 102. At this time, the air pressure in the upper chamber will decrease, making the air pressure in the upper chamber less than the air pressure in the annular outer channel 104. This causes the diaphragm 3 to bend upward, moving the diaphragm 3 away from the valve seat inlet 103. This connects the valve seat inlet 103 with the annular outer channel 104, allowing the medium to directly enter the valve seat inlet 103 from the annular outer channel 104, ensuring normal medium flow.

[0023] Of course, in order to ensure that the diaphragm 3 can stably seal the valve seat inlet 103 when it operates, two sheet metal parts are usually installed in the middle of the diaphragm 3. One is a lower sheet metal part 8 installed at the lower end of the diaphragm 3, and the other is an upper sheet metal part 9 installed at the upper end of the diaphragm 3 with an opening at the top. When the diaphragm 3 seals the valve seat inlet 103, the lower sheet metal part 8 will fall into the valve seat inlet 103, and the upper sheet metal part 9 will press the middle of the diaphragm 3 tightly against the valve seat inlet 103 to ensure the sealing effect.

[0024] This embodiment is an improvement on the above-described solenoid valve structure. Without changing the working principle of the solenoid valve, the action of the solenoid valve is detected synchronously by the movement of the diaphragm 3. The specific technical solution of this embodiment is as follows: like Figures 1-5 As shown, this embodiment provides a solenoid valve action detection mechanism, including a display magnetic plate 10, a swing arm 11, a magnet 12, a positioning shaft 13, and a torsion spring 14. The positioning shaft 13 is installed between the diaphragm 3 and the valve cover 2 around the moving iron core 6, ensuring that the positioning shaft 13 will not affect the normal operation of the solenoid valve. The middle part of the swing arm 11 is rotatably connected to the positioning shaft 13 and can rotate around the positioning shaft 13. The positioning shaft 13 is installed on the valve cover 2, ensuring the stability of the positioning shaft 13 and not affecting the action of the diaphragm 3. The torsion spring 14 is sleeved on the outside of the positioning shaft 13. One end of the torsion spring 14 is connected to or abuts against the valve cover 2, and the other end of the torsion spring 14 is connected to or abuts against one end of the swing arm 11, so as to utilize the spring of the torsion spring 14. The spring force causes the other end of the swing arm 11 to move away from the valve cover 2 in its natural state, thereby controlling the magnet 12 to move away from the display magnetic sheet 10, so that the display magnetic sheet 10 will not display a pattern; the other end of the swing arm 11 is a magnet end with an embedded magnet 12, so that the magnet 12 can move closer to or away from the display magnetic sheet 10 as the swing arm 11 swings. The display magnetic sheet 10 is embedded in the outer surface of the valve cover 2 to ensure its stability. The edge of the upper sheet metal part 9 is correspondingly set with the swing arm 11 between the magnet end and the positioning shaft 13. When the solenoid valve is energized, the upper sheet metal part 9 moves upward with the diaphragm 3 and can abut against the swing arm 11, so that the magnet end of the swing arm 11 swings upward and moves closer to the display magnetic sheet 10, and the display magnetic sheet 10 becomes magnetic under the action of the magnet's magnetic field.

[0025] When the solenoid valve of this invention is energized, the coil generates magnetic force, causing the moving iron core 6 to lift upward. The medium in the upper chamber enters the valve seat inlet 103 through the crater 4, causing the medium to flow out along the valve body outlet channel 102. As the pressure in the upper chamber decreases, a differential pressure is generated between the upper chamber above the diaphragm 3 and the annular outer channel 104, causing the diaphragm 3 to bend upward, driving the upper sheet metal part 9 to move upward. The upper sheet metal part 9 lifts the magnet end of the swing arm 11, causing the magnet 12 in the magnet end to approach the display magnetic plate 10, causing the display magnetic plate 10 to display a pattern, indicating that the solenoid valve is in the open state. When the solenoid valve is de-energized, the coil magnetism disappears, the pressure above the diaphragm 3 stops discharging, the pressure in the upper chamber is restored, the diaphragm 3 is reset under the action of the moving iron core 6 and the spring 7, and the medium is blocked through the air inlet 301. The torsion spring 14 relaxes, causing the magnet end of the swing arm 11 to descend and stick to the upper sheet metal part 9. The magnet 12 moves downward and the magnetic field leaves the display magnetic plate 10. The pattern on the display magnetic plate 10 disappears, indicating that the solenoid valve has returned to the closed state.

[0026] This invention allows for external observation of the solenoid valve's operation. Users can determine the valve's open / closed state by observing the pattern on the display plate, eliminating the need for sound or vibration detection. This achieves electromagnetic operation detection without requiring the opening of a sealed cavity or additional sealing design, reducing design complexity and failure risks associated with adding functionality. Furthermore, this invention leverages the cross-domain application of display plates, expanding their use to observe solenoid valve operation. Moreover, it employs a non-mechanical, non-contact measurement method, ensuring high reliability.

[0027] This utility model extends the movement of the moving parts inside the valve that directly reflect the valve's action through the linkage mechanism formed by the swing arm 11 into a movement that is easier to detect. On this basis, the information is transmitted to the outside of the shell wall by utilizing the characteristics of the magnet 12 and the display magnetic sheet 10 that are not affected by the shell wall, and is transformed into a signal that can be recognized by people and sensors.

[0028] As a preferred embodiment of this invention, it should be further explained that the inner top surface of the valve cover 2 is provided with a downwardly extending positioning block 201, and the positioning shaft 13 is installed at the lower part of the positioning block 201, so that the installation position of the swing arm 11 is biased towards the middle, thereby giving it a certain swing space, ensuring that the swing arm 11 can rotate stably around the positioning shaft 13 during the operation of the solenoid valve, without any deviation or shaking, thereby ensuring that the pattern on the display magnetic sheet 10 is displayed accurately, so that the user can clearly judge the opening and closing status of the solenoid valve.

[0029] As a preferred embodiment of this invention, it should be further explained that the lower end of the positioning block 201 has a mounting groove cut into its center. The center of the positioning shaft 13 is positioned within the mounting groove. Threaded grooves are provided on both sides of the center of the mounting groove, and a positioning bolt is threaded into the threaded groove, abutting against the lower end of the positioning shaft 13. This further stabilizes the positioning shaft's position within the mounting groove, preventing it from loosening or shifting due to frequent oscillations during the operation of the solenoid valve. Simultaneously, the threaded connection of the positioning bolt facilitates subsequent maintenance and replacement, reducing operating costs.

[0030] As a preferred embodiment of this invention, it should be further noted that the diameter of the screw portion of the positioning bolt is larger than the width of the mounting groove. The screw portion can tightly press against the two side walls of the mounting groove, thereby generating sufficient friction to further enhance the stability of the positioning shaft. Even during the long-term, high-frequency operation of the solenoid valve, the positioning shaft can maintain its original position without loosening or displacement, thus ensuring the stability and reliability of the entire detection mechanism.

[0031] As a preferred embodiment of this invention, it should be further noted that the positioning bolt is a plastic bolt. Plastic bolts have significant advantages such as light weight and strong corrosion resistance. Compared to metal bolts, in environments like solenoid valve action detection mechanisms that may come into contact with different media and require frequent operation, plastic bolts are better adapted and less prone to corrosion due to environmental factors, thus extending their service life and further ensuring the stability of the positioning shaft, providing reliable support for the long-term stable operation of the entire detection mechanism. Moreover, plastic bolts are relatively simple to manufacture and have lower costs, which helps reduce the overall manufacturing cost of the detection mechanism.

[0032] As a preferred embodiment of this invention, it should be further explained that one end of the swing arm 11 is sleeved outside the positioning block 201, and the positioning shaft 13 is inserted into one end of the swing arm 11. Further, one end of the swing arm 11 is a U-shaped frame, which is sleeved outside the positioning block 201. The positioning shaft 13 is inserted into the middle of the U-shaped frame, and a limiting shaft 15 is inserted into the opening of the U-shaped frame. The limiting shaft 15 is located on the side of the positioning block 201 away from the magnetic display plate 10. When the solenoid valve is not working, the upper end of the limiting shaft 15 abuts against the positioning block 201, allowing the limiting shaft to effectively limit the movement and prevent collisions caused by excessive rotation angle of the swing arm. When the solenoid valve starts working, the swing arm rotates around the positioning shaft under the action of electromagnetic force. The limiting shaft moves along with the swing arm, but due to its reasonable positioning, it does not obstruct the normal rotation of the swing arm. Moreover, the abutment design between the limit shaft and the positioning block can provide a stable support for the swing arm when the solenoid valve is not working, avoiding unnecessary shaking of the swing arm due to external factors, and further ensuring the stability and reliability of the entire detection mechanism.

[0033] As a preferred embodiment of this invention, it should be further explained that one end of the torsion spring 14 is connected to or abuts against the other side of the positioning block 201, and the other end of the torsion spring 14 is connected to or abuts against the limiting shaft 15. When the solenoid valve starts to work and the swing arm rotates around the positioning shaft, the torsion spring will deform with the movement of the swing arm, and its elastic force will also change accordingly. However, this change will not hinder the normal rotation of the swing arm. On the contrary, it can assist the swing arm to rotate to a certain extent, making the rotation of the swing arm more stable and smooth, thereby ensuring the reliability and accuracy of the detection mechanism in the dynamic working process.

[0034] As a preferred embodiment of this invention, it should be further explained that when the solenoid valve is not working, one end of the swing arm 11 is set horizontally, and the other end of the swing arm 11 extends downward at an angle. This facilitates the swing arm to rotate quickly and accurately around the positioning axis, thereby ensuring that the entire detection mechanism can respond quickly to changes in the working state of the solenoid valve and improving the timeliness and accuracy of the detection mechanism in detecting the action of the solenoid valve.

[0035] As a preferred embodiment of this invention, it should be further explained that the valve cover 2 is made of a non-magnetic material. The use of a non-magnetic material for the valve cover 2 allows the magnetic field of the magnet to penetrate the metal wall of the cover and reach the magnetic display sheet.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A solenoid valve action detection mechanism, characterized in that, The device includes a magnetic plate (10), a swing arm (11), a magnet (12), a positioning shaft (13), and a torsion spring (14). The positioning shaft (13) is installed between the diaphragm (3) on the periphery of the moving iron core (6) and the valve cover (2). The middle part of the swing arm (11) is rotatably connected to the positioning shaft (13). The positioning shaft (13) is installed on the valve cover (2). The torsion spring (14) is sleeved on the outside of the positioning shaft (13). One end of the torsion spring (14) is connected to or abuts against the valve cover (2), and the other end of the torsion spring (14) is connected to or abuts against one end of the swing arm (11) to utilize the spring force of the torsion spring (14). This allows the other end of the swing arm (11) to be away from the valve cover (2) in its natural state; the other end of the swing arm (11) is a magnet end with an embedded magnet (12), and the magnetic plate (10) is embedded in the outer surface of the valve cover (2). The edge of the upper sheet metal part (9) is correspondingly set with the swing arm (11) between the magnet end and the positioning shaft (13). When the solenoid valve is powered on, the upper sheet metal part (9) moves upward with the diaphragm (3) and can abut against the swing arm (11), causing the magnet end of the swing arm (11) to swing upward and approach the magnetic plate (10), and the magnetic plate (10) becomes magnetic under the action of the magnetic field.

2. The solenoid valve action detection mechanism according to claim 1, characterized in that, The valve cover (2) has a downwardly extending positioning block (201) on its inner top surface, and the positioning shaft (13) is installed at the lower part of the positioning block (201).

3. The solenoid valve action detection mechanism according to claim 2, characterized in that, The lower end of the positioning block (201) has a mounting groove cut in the middle. The middle part of the positioning shaft (13) is set in the mounting groove. Threaded grooves are opened on both sides of the middle part of the mounting groove. The positioning bolts that abut against the lower end of the positioning shaft (13) are threadedly connected in the threaded grooves.

4. The solenoid valve action detection mechanism according to claim 3, characterized in that, The diameter of the threaded portion of the positioning bolt is greater than the width of the mounting groove.

5. The solenoid valve action detection mechanism according to claim 4, characterized in that, The positioning bolt is a plastic bolt.

6. A solenoid valve action detection mechanism according to claim 2 or 3, characterized in that, One end of the swing arm (11) is sleeved on the outside of the positioning block (201), and the positioning shaft (13) is inserted into one end of the swing arm (11).

7. The solenoid valve action detection mechanism according to claim 6, characterized in that, One end of the swing arm (11) is a U-shaped frame, which is sleeved on the outside of the positioning block (201). The positioning shaft (13) is inserted into the middle of the U-shaped frame, and a limit shaft (15) is inserted into the opening of the U-shaped frame. The limit shaft (15) is located on the side of the positioning block (201) away from the magnetic plate (10). When the solenoid valve is not working, the upper end of the limit shaft (15) abuts against the positioning block (201).

8. The solenoid valve action detection mechanism according to claim 6, characterized in that, One end of the torsion spring (14) is connected to or abuts against the other side of the positioning block (201), and the other end of the torsion spring (14) is connected to or abuts against the limiting shaft (15).

9. A solenoid valve action detection mechanism according to claim 6, characterized in that, When the solenoid valve is not working, one end of the swing arm (11) is set horizontally, and the other end of the swing arm (11) extends downward at an angle.

10. The solenoid valve action detection mechanism according to claim 1, characterized in that, The valve cover (2) is made of a non-magnetic material.

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