Electromagnetic valve detection structure

Abstract

The utility model belongs to solenoid valve valve position detection technical field discloses a solenoid valve detection structure, include: solenoid valve, be provided with in solenoid valve with cooperate control solenoid valve open / close's valve core or static iron core, apparent magnetic sheet, apparent magnetic sheet installs in solenoid valve's valve core one side or static iron core one side, when apparent magnetic sheet installs in solenoid valve's valve core one side, the head of valve core is installed with the magnet of its side towards apparent magnetic sheet, is used for detecting the moving condition of magnet when valve core is in action through the pattern change on apparent magnetic sheet, when apparent magnetic sheet installs in solenoid valve's static iron core one side, is used for detecting the magnetization situation inside solenoid valve through the color change or pattern change on apparent magnetic sheet, and transparent positioning piece, transparent positioning piece installs on solenoid valve, apparent magnetic sheet installs in the inside of transparent positioning piece. The utility model has reduced the modification cost, and the detection effect is better.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic valve position detection technology, and specifically relates to an electromagnetic valve detection structure. Background Technology

[0002] A solenoid valve is a basic automation component that uses electromagnetic force to directly move a valve core, thereby quickly opening or closing the passage of fluids (gas, liquid, oil, steam, etc.). Before a solenoid valve is put into use, valve position detection is required to ensure that the valve's opening / closing action is complete or to provide electromagnetic information. Currently, there are two main methods for valve position detection in solenoid valves:

[0003] 1. Mechanical contact, pneumatic actuation, rotation, or lifting of the sign allows for direct observation of the action signal.

[0004] This valve position detection method requires complex mechanical design, increases the risk of leakage, and can only perform indirect measurement and switching measurement.

[0005] 2. Install the sensor

[0006] Sensors require external circuitry and are often used in conjunction with indicator lights, which increases the requirements for wiring. This is not suitable for those who want to simply observe the operation of solenoid valves but cannot or do not need to have wiring.

[0007] In summary, existing methods for detecting the valve position of solenoid valves still have many shortcomings, and a more direct and suitable detection method is urgently needed. Utility Model Content

[0008] The purpose of this invention is to provide a solenoid valve detection structure to solve the aforementioned problems existing in the prior art.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A solenoid valve detection structure, comprising:

[0011] A solenoid valve, which contains a valve core or stationary iron core to control the opening and closing of the solenoid valve.

[0012] A display magnetic strip is installed on either the valve core or the stationary iron core of the solenoid valve. When the display magnetic strip is installed on the valve core, a magnet is mounted on the head of the valve core facing the display magnetic strip. The movement of the magnet during valve core operation is detected by changes in the pattern on the display magnetic strip. When the display magnetic strip is installed on the stationary iron core, it is used to detect the electromagnetic state inside the solenoid valve by changes in color or pattern on the display magnetic strip.

[0013] A transparent positioning element is installed on the solenoid valve, and a magnetic display plate is installed inside the transparent positioning element.

[0014] As a preferred technical solution of this utility model, the solenoid valve is a pilot-operated solenoid valve with a valve core inside, a fixing ring is installed on the head of the valve core, and a magnet is installed on one side of the fixing ring.

[0015] As a preferred technical solution of this utility model, an annular outer groove is provided on the outer wall of the valve core head, and a fixing ring is installed outside the annular outer groove, with the fixing ring and the annular outer groove being interference fit.

[0016] As a preferred technical solution of this utility model, a magnet mounting groove is provided on one side of the fixing ring, and one end of the magnet is inserted into the magnet mounting groove.

[0017] As a preferred technical solution of this utility model, an outer groove is provided on one side of the solenoid valve corresponding to the magnet, a magnetic display sheet is installed on the inner bottom surface of the outer groove, and a transparent positioning component is installed in the outer groove outside the magnetic display sheet.

[0018] As a preferred technical solution of this utility model, the transparent positioning element is interference-fitted with the outer groove.

[0019] As a preferred technical solution of this utility model, the solenoid valve is a direct-acting solenoid valve with an internal stationary iron core, and the transparent positioning component is an exhaust nut installed outside the stationary iron core. An annular inner groove is provided on the inner wall of the exhaust nut, and a positioning nut that is threadedly connected to the stationary iron core is installed in the annular inner groove.

[0020] As a preferred technical solution of this utility model, the magnetic display sheet is installed in the annular inner groove outside the positioning nut.

[0021] As a preferred technical solution of this utility model, the magnetic display sheet has a ring structure.

[0022] As a preferred technical solution of this utility model, the transparent positioning element is made of transparent acrylic sheet or transparent plastic.

[0023] Beneficial Effects: This invention simplifies the testing of both pilot-operated and direct-acting solenoid valves. For pilot-operated solenoid valves, a magnet is installed on the valve core (a moving part) inside the valve, and a display magnetic sheet is installed outside the solenoid valve housing. The magnetic force of the magnet passes through the solenoid valve housing, causing the display magnetic sheet to change color and display stripe or dot patterns. As the moving part moves, the pattern on the display magnetic sheet also moves, allowing for a general observation of the operation and blockages. This method is cost-effective for simple observation needs. For direct-acting solenoid valves, the local magnetic leakage of the electromagnet inside the valve can be utilized. By placing the display magnetic sheet close to the stationary iron core in a region of dense magnetic field lines, the display magnetic sheet changes color or displays patterns, such as stripes or rings. Observers can visually obtain the electromagnetization information of the electromagnet through these changes.

[0024] This invention cleverly utilizes a magnetic display sheet, reducing modification costs. Only the magnetic display sheet needs to be fixed, or, depending on the situation, the magnet simultaneously needs to be fixed. This facilitates modification based on existing equipment. The entire testing process involves no mechanical contact, resulting in a long service life, no wear, and extremely high reliability. In practice, observation can be performed through the outer casing, transforming the electromechanical switch signal into an analog visual signal. This provides a reference for judging the solenoid valve's operating status without needing to open the sealed cavity or perform additional sealing designs, reducing the design difficulty and failure risk associated with adding functionality. Compared to existing detection methods, this invention can, to some extent, determine whether there is a jam or blockage in the action through changes in color intensity and pattern movement. Other methods can only observe opening and closing, and their wider thresholds fail to detect subtle phenomena that indicate an impending malfunction. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the application of this utility model in a pilot-operated solenoid valve.

[0026] Figure 2 This is a cross-sectional view of the present invention when applied to a pilot-operated solenoid valve.

[0027] Figure 3 for Figure 2 An enlarged schematic diagram of part A in the middle;

[0028] Figure 4 This is a three-dimensional schematic diagram of the application of this utility model in a direct-acting solenoid valve;

[0029] Figure 5 for Figure 4 Enlarged schematic diagram of part B.

[0030] 1-Solenoid valve; 101-Valve core; 111-Stationary iron core; 112-Positioning nut; 2-Magnetic display plate; 3-Magnet; 4-Transparent positioning element; 5-Retaining ring. Detailed Implementation

[0031] 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. Example

[0032] like Figures 1-5 As shown, this embodiment provides a solenoid valve detection structure, including a solenoid valve 1, a display magnetic sheet 2, and a transparent positioning element 4. The solenoid valve 1 is provided with a valve core 101 or a stationary iron core 111 to cooperate in controlling the opening and closing of the solenoid valve 1. Depending on the actual situation, different solenoid valves can be used. For example, this utility model takes the solenoid valve 1 with a valve core 101 inside as a pilot-operated solenoid valve and the solenoid valve 1 with a stationary iron core 111 inside as a direct-acting solenoid valve as examples for explanation.

[0033] The display magnetic plate 2 is installed on one side of the valve core 101 or the stationary iron core 111 of the solenoid valve 1. It will not affect the normal operation of the valve core 101 or the stationary iron core 111. When the display magnetic plate 2 is installed on one side of the valve core 101 of the solenoid valve 1 for a pilot-operated solenoid valve, a magnet 3 is installed on the head of the valve core 101 facing the display magnetic plate 2. When the valve core 101 moves, it can drive the magnet 3 to move together. The display magnetic plate 2 and the magnet 3 can cooperate to change the pattern on the display magnetic plate 2 when the magnet 3 is in different positions. The movement of the magnet 3 when the valve core 101 moves can be detected by the change of the pattern on the display magnetic plate 2. This allows for a general observation of the movement and jamming of the valve core 101. It can be used for simple observation needs at low cost. When the display magnetic plate 2 is installed on one side of the stationary iron core 111 of the solenoid valve 1 for a direct-acting solenoid valve, the local leakage of magnetic flux of the electromagnet inside the direct-acting solenoid valve can be utilized to bring the display magnetic plate 2 close to the area with dense magnetic field lines, so that the display magnetic plate 2 changes color or displays patterns such as stripes or rings. This can be used to detect the electromagnetic status inside the solenoid valve 1 through the color change or pattern change on the display magnetic plate 2, so that the observer can obtain the electromagnetic information of the electromagnet through the intuitive change of the display magnetic plate 2.

[0034] Specifically, a transparent positioning element 4 for fixing can be set outside the magnetic display sheet 2. The transparent positioning element 4 is installed on the solenoid valve 1, and the magnetic display sheet 2 is installed inside the transparent positioning element 4, so as to ensure the stability of the magnetic display sheet 2 and at the same time, it will not affect the observation of the magnetic display sheet 2.

[0035] This invention allows for simplified testing of both pilot-operated and direct-acting solenoid valves. For pilot-operated solenoid valves, a magnet 3 can be installed on the valve core 101, which is a moving part inside the valve. A display magnetic sheet 2 is installed outside the solenoid valve housing. The magnetic force of the magnet 3 passes through the solenoid valve housing, causing the display magnetic sheet 2 to change color and display stripe or dot patterns. As the moving part moves, the pattern on the display magnetic sheet 2 also moves, allowing for a general observation of the operation and blockage. This method is suitable for simple observation needs at low cost. For direct-acting solenoid valves, the local magnetic leakage of the electromagnet inside the solenoid valve 1 can be utilized. The display magnetic sheet 2 can be placed close to the side of the stationary iron core 111 in the area of ​​dense magnetic field lines, causing the display magnetic sheet 2 to change color or display patterns, such as stripes or rings. The observer can obtain the electromagnetization information of the electromagnet through visual changes.

[0036] In practice, magnetic display sheets are generally used for factory or maintenance inspections of motors or magnets, and are made of a substrate and a magnetically sensitive material into a thin sheet. This invention cleverly utilizes the magnetic display sheet, reducing modification costs. Only the fixing of the display sheet or, depending on the actual situation, the fixing of the magnet needs to be ensured, facilitating modification based on existing equipment. The entire testing process involves no mechanical contact, has a long service life, does not experience wear, and has extremely high reliability. In practice, observation can also be performed through the outer casing, transforming the electromechanical switch signal into an analog visual signal, providing a reference for judging the solenoid valve's operating status. It eliminates the need to open the sealed cavity and perform additional sealing designs, reducing the design difficulty and failure risk caused by adding functions. Compared to existing detection methods, this invention's method can, to some extent, determine whether there is a jam or blockage in the action through color changes and pattern movement, while other methods can only observe opening and closing, and have a wider threshold that cannot detect subtle phenomena that indicate an impending fault.

[0037] Specifically, the application of pilot-operated solenoid valves and direct-acting solenoid valves will be explained in more detail below.

[0038] like Figure 1 , Figure 2 and 3 As shown, when the solenoid valve 1 is a pilot-operated solenoid valve with an internal valve core 101, a retaining ring 5 can be installed on the head of the valve core 101, and then the magnet 3 can be installed on one side of the retaining ring 5. This makes the installation of the magnet 3 easier and reduces changes to the solenoid valve 1. It should be noted that in practice, the inner diameter of the through hole inside the valve body can be enlarged according to the actual situation to ensure the smooth installation of the magnet 3.

[0039] As a preferred embodiment, this embodiment further details that an annular outer groove is provided on the outer wall of the valve core 101 head, and the fixing ring 5 is installed outside the annular outer groove. The fixing ring 5 and the annular outer groove are interference-fitted, thereby ensuring the stability of the fixing ring 5 at the valve core 101 head through a simple installation method, and also ensuring the stability of the magnet 3 at the valve core 101 head.

[0040] As a preferred embodiment, this embodiment further details that a magnet mounting groove is provided on one side of the fixing ring 5, and one end of the magnet 3 is inserted into the magnet mounting groove. Here, the stability of the magnet 3 can also be ensured by an interference fit, thereby making the design and installation of the structure easier.

[0041] As a preferred embodiment, this embodiment further details that an outer groove is provided on one side of the solenoid valve 1 corresponding to the magnet 3, that is, an outer groove is provided on the outer wall of the solenoid valve 1. The display magnetic sheet 2 is installed on the inner bottom surface of the outer groove, and the transparent positioning member 4 is installed in the outer groove outside the display magnetic sheet 2, thereby ensuring the stability of the display magnetic sheet 2 and making the display magnetic sheet 2 as close as possible to the magnet 3, so that when the magnet 3 is activated, the display magnetic sheet 2 can sensitively show pattern changes.

[0042] As a preferred embodiment, this embodiment further details that the transparent positioning element 4 is interference-fitted with the outer groove, which can ensure the stability of the transparent positioning element 4 through a simple installation method, thereby ensuring the stability of the magnetic display sheet 2.

[0043] As a preferred embodiment, this embodiment further details that when used in a pilot-operated solenoid valve, the transparent positioning element 4 is preferably a block structure, and the transparent positioning element 4 is made of transparent materials such as transparent acrylic sheet or transparent plastic, so that the transparent positioning element 4 can be made of low-cost materials without affecting the observation and positioning of the magnetic display sheet 2.

[0044] like Figure 4 and Figure 5 As shown, when the solenoid valve 1 is a direct-acting solenoid valve with a stationary iron core 111 inside, the stationary iron core 111 is installed inside the solenoid valve 1, and an exhaust nut is installed outside the stationary iron core 111. The transparent positioning component 4 in this utility model is the exhaust nut installed outside the stationary iron core 111. It is just that the existing opaque exhaust nut has been changed to a transparent exhaust nut, which makes it easier to observe the changes of the display magnetic sheet 2. An annular inner groove is provided on the inner wall of the exhaust nut. A positioning nut 112 that is threadedly connected to the stationary iron core 111 is installed in the annular inner groove. The positioning nut 112 can be snapped in through the annular inner groove. The positioning nut 112 can be positioned by the threaded connection between the positioning nut 112 and the head of the stationary iron core 111.

[0045] It should be noted that, in practice, for direct-acting solenoid valves, the solenoid valve internally contains a coil and a moving iron core. When the solenoid valve is working, the coil is energized, and the magnetic flux forms a closed magnetic circuit along the path of "stationary iron core → working air gap → moving iron core → non-magnetic sleeve → stationary iron core," generating an axial attraction that pulls the moving iron core towards the stationary iron core, thus directly opening the valve and closing the magnetic circuit. For positioning, the end face of the stationary iron core is the "mechanical stop" of the moving iron core, determining the full opening stroke of the valve. Its end face is often machined into a conical or spherical surface to reduce the residual magnetic attraction force and shorten the release time.

[0046] As a preferred embodiment, this embodiment further details that the magnetic display sheet 2 is installed in the annular inner groove outside the positioning nut 112, and the magnetic display sheet 2 is clamped by the cooperation of the positioning nut 112 and the transparent positioning member 4 to ensure the stability of the magnetic display sheet 2.

[0047] As a preferred embodiment, this embodiment further details that the magnetic display sheet 2 has a ring structure, which facilitates observation of changes in the magnetic display sheet 2 from any angle of the transparent positioning member 4.

[0048] As a preferred embodiment, this embodiment further details that when used in a direct-acting solenoid valve, the transparent positioning element 4 is made of transparent acrylic sheet or transparent plastic. By directly improving the material of the vent nut, the low-cost manufacturing of the solenoid valve can be guaranteed, while not affecting the observation and positioning of the display magnetic sheet 2.

[0049] 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 detection structure, characterized in that, include: Solenoid valve (1), a valve core (101) or a stationary iron core (111) is provided inside the solenoid valve (1) to cooperate in controlling the opening / closing of the solenoid valve (1). A display magnetic sheet (2) is installed on one side of the valve core (101) or the stationary iron core (111) of the solenoid valve (1). When the display magnetic sheet (2) is installed on one side of the valve core (101) of the solenoid valve (1), a magnet (3) is installed on the head of the valve core (101) facing the display magnetic sheet (2) to detect the movement of the magnet (3) when the valve core (101) is activated by the pattern change on the display magnetic sheet (2). When the display magnetic sheet (2) is installed on one side of the stationary iron core (111) of the solenoid valve (1), it is used to detect the electromagnetic status inside the solenoid valve (1) by the color change or pattern change on the display magnetic sheet (2). A transparent positioning element (4) is installed on the solenoid valve (1), and a magnetic display piece (2) is installed inside the transparent positioning element (4).

2. The solenoid valve detection structure according to claim 1, characterized in that, The solenoid valve (1) is a pilot-operated solenoid valve with a valve core (101) inside. A fixing ring (5) is installed on the head of the valve core (101), and a magnet (3) is installed on one side of the fixing ring (5).

3. The solenoid valve detection structure according to claim 2, characterized in that, The valve core (101) has an annular outer groove on its outer wall, and a fixing ring (5) is installed outside the annular outer groove, with the fixing ring (5) and the annular outer groove being interference fit.

4. The solenoid valve detection structure according to claim 2, characterized in that, A magnet mounting groove is provided on one side of the fixing ring (5), and one end of the magnet (3) is inserted into the magnet mounting groove.

5. A solenoid valve detection structure according to any one of claims 2-4, characterized in that, The solenoid valve (1) corresponding to the magnet (3) has an outer groove on one side. The magnetic display sheet (2) is installed on the inner bottom surface of the outer groove, and the transparent positioning piece (4) is installed in the outer groove outside the magnetic display sheet (2).

6. The solenoid valve detection structure according to claim 5, characterized in that, The transparent positioning element (4) is interference-fitted with the outer groove.

7. The solenoid valve detection structure according to claim 1, characterized in that, The solenoid valve (1) is a direct-acting solenoid valve with a stationary iron core (111) inside. The transparent positioning component (4) is an exhaust nut installed outside the stationary iron core (111). An annular groove is provided on the inner wall of the exhaust nut, and a positioning nut (112) that is threadedly connected to the stationary iron core (111) is installed in the annular groove.

8. The solenoid valve detection structure according to claim 7, characterized in that, The magnetic plate (2) is installed in the annular inner groove outside the positioning nut (112).

9. The solenoid valve detection structure according to claim 7, characterized in that, The magnetic display sheet (2) has a ring structure.

10. The solenoid valve detection structure according to claim 1, characterized in that, The transparent positioning element (4) is made of transparent acrylic sheet or transparent plastic.

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