A valve positioner that can be operated by pressing buttons without opening the cover

Abstract

The present invention discloses a valve positioner capable of button operation without opening the cover, which includes a button that can operate without opening the cover, a housing, and a permanent magnet; the button that can operate without opening the cover includes a reed switch and a circuit board; the reed switches are evenly distributed around the circuit board. Two reed switches are spaced a certain distance apart, so that when the permanent magnet attracts one of the reed switches, it will not interfere with the adjacent reed switch. After the reed switches are installed, they are attached to the upper cover of the housing to achieve a sensitive response to the permanent magnet. A permanent magnet placement groove is provided on the housing for fixing the permanent magnet when it is not in use. After adopting the valve positioner capable of button operation without opening the cover of the present invention, through the electromagnetic induction effect between the reed switch and the permanent magnet, when the button needs to be operated, the permanent magnet attracts the reed switch through the housing, thereby achieving the button effect, realizing the overall sealing of the valve, and improving the safety and reliability of the valve.

Description

Technical Field

[0001] The present invention belongs to the technical field of valve positioner accessories, and particularly relates to a valve positioner that can be operated by pressing buttons without opening the cover. Background Art

[0002] The operation of pressing buttons on valves is an important operation step for pneumatic valve positioners, providing the configuration data setting and adjustment function for pneumatic control valves, playing a decisive role in the efficient and safe operation of the entire control valve, and being an important way for intelligent instrument operators to conduct human-machine dialogue for pneumatic control valves.

[0003] Many valve manufacturers adopt a contact operation method in which the buttons are directly exposed on the upper cover, or a button operation method that requires opening the cover. The former requires hollowing out the upper cover structure, which destroys the overall protection and reduces the seismic resistance of the valve positioner; the latter requires disassembling the upper cover, with complex operations and being less efficient and safe.

[0004] Therefore, there is a need to design a device that can operate the valve without opening the cover. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a valve positioner that can be operated by pressing buttons without opening the cover in view of the above-mentioned prior art.

[0006] To achieve the above technical purpose, the technical solution adopted by the present invention is as follows:

[0007] A valve positioner that can be operated by pressing buttons without opening the cover, the valve positioner includes a button that can be operated without opening the cover, a housing, and a permanent magnet;

[0008] The button that can be operated without opening the cover includes a reed switch and a circuit board;

[0009] The reed switches are evenly distributed around the circuit board.

[0010] Preferably, the number of reed switches is two, and the two reed switches are spaced at a certain distance to ensure that when one reed switch is attracted by the permanent magnet, it will not interfere with the adjacent reed switch.

[0011] Preferably, after installation, the reed switches are attached to the upper cover of the housing to achieve a sensitive response to the permanent magnet.

[0012] Preferably, a permanent magnet placement groove is provided on the housing for fixing the permanent magnet when it is not in use.

[0013] Preferably, there are multiple reed switches, and a display screen is provided at the central position of the multiple reed switches for feeding back operation information to the user.

[0014] Preferably, a display window is provided on the housing corresponding to the installed display screen.

[0015] Preferably, an arrow mark is provided at the position of the reed switch corresponding to the outer shell for identifying the position of the reed switch.

[0016] The present invention has the following beneficial effects:

[0017] After adopting a valve positioner with non-opening key operation of the present invention, through the electromagnetic induction effect between the reed switch and the permanent magnet, when the key needs to be operated, the permanent magnet attracts the reed switch through the outer shell, thereby realizing the key effect, achieving the overall sealing of the valve, and improving the safety and reliability of the valve. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of an embodiment of the reed switch and the circuit board part of a valve positioner with non-opening key operation of the present invention.

[0019] Figure 2 It is a schematic diagram of an assembly of an embodiment of a valve positioner with non-opening key operation of the present invention.

[0020] In the figure: 1, reed switch; 2, circuit board; 3, display screen; 4, outer shell; 5, display window; 6, arrow mark; 7, placement groove; 8, permanent magnet. Detailed Embodiment

[0021] The following further describes the embodiments of the present invention in detail with reference to the drawings.

[0022] Refer to Figure 1 and Figure 2 , a valve positioner with non-opening key operation, the valve positioner includes a non-opening key, an outer shell 4 and a permanent magnet 8;

[0023] The non-opening key includes a reed switch 1 and a circuit board 2;

[0024] The reed switches 1 are evenly distributed around the circuit board 2. During application, a display screen 3 is further provided at the middle position of the circuit board 2 for feeding back operation information to the user. When the display screen 3 is provided, a display window 5 is further provided at the position of the outer shell corresponding to the display screen 3.

[0025] During specific implementation, the two reed switches 1 are spaced apart by a certain distance to ensure that when the permanent magnet 8 attracts one of the reed switches 1, it will not interfere with the adjacent reed switch 1.

[0026] During specific implementation, after the reed switch 1 is installed, it fits against the upper cover of the outer shell 4 to achieve a sensitive response to the permanent magnet 8. During specific application, an arrow mark 6 is provided at the position of the outer shell 4 corresponding to the position of the reed switch 1 for identifying the position of the reed switch 1.

[0027] In a specific implementation, the housing 4 is provided with a groove 7 for placing the permanent magnet 8, which is used to fix the permanent magnet 8 when the permanent magnet 8 is not in use.

[0028] After adopting the valve positioner that can be operated by buttons without opening the cover of the present invention, through the electromagnetic induction effect between the reed switch and the permanent magnet, when the button needs to be operated, the permanent magnet attracts the reed switch through the shell, thereby realizing the key effect, achieving the overall sealing of the valve, and improving the safety and reliability of the valve.

[0029] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A valve positioner that can be operated by pressing buttons without opening the cover, characterized in that: The valve positioner includes a non-opening cover button, a housing (4) and a permanent magnet (8); The non-opening cover button includes a reed switch (1) and a circuit board (2); The reed switches (1) are evenly distributed around the circuit board (2); The number of the reed switches (1) is multiple, and the multiple reed switches (1) are spaced at a certain distance, so that when one of the reed switches (1) is attracted by the permanent magnet (8), it will not interfere with the adjacent reed switch (1); After installation, the reed switches (1) are attached to the upper cover of the housing (4) to achieve a sensitive response to the permanent magnet (8); A placement groove (7) for the permanent magnet (8) is provided on the housing (4) for fixing the permanent magnet (8) when the permanent magnet (8) is not in use.

2. The valve positioner according to claim 1, which can be operated by pressing buttons without opening the cover, characterized in that: A display screen (3) is arranged at the center position of the reed switch (1) for feeding back operation information to the user.

3. The valve positioner according to claim 2, which can be operated by pressing buttons without opening the cover, characterized in that: A display window (5) is provided on the housing (4) corresponding to the installed display screen (3).

4. The valve positioner according to claim 3, which can be operated by pressing buttons without opening the cover, characterized in that: An arrow mark (6) is provided on the housing (4) corresponding to the position of the reed switch (1) for identifying the position where the reed switch (1) is located.

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