Valve position transmitter

Abstract

The invention relates to the technical field of transmitters, in particular to a valve position transmitter which comprises a shell installed on the top of a valve switch and an upper cover detachably installed on the top of the shell, an induction detection assembly used for detecting the actual position of the valve switch is arranged on the inner side of the shell, and the induction detection assembly comprises a rotating shaft arranged on the shell. The rotating angle range of the fan-shaped rotating disc is set to be 0-90 degrees, the bottom end of the rotating shaft is in transmission connection with the valve switch, the two side edges of the fan-shaped rotating disc are in a vertical state, the two ends of the fan-shaped rotating disc are respectively provided with an induction magnetic head, and the two sides of the interior of the shell are respectively and fixedly provided with a switching value sensor. The system has higher flexibility and diversity in practical application, can meet the requirements of switching control and accurate adjustment at the same time, reduces the requirement of multiple devices, reduces the complexity of the system, integrates switching quantity and analog quantity signals, and effectively saves the field use space and the cost of a user.

Description

Technical Field

[0001] The invention relates to the technical field of transmitters, in particular to a valve position transmitter. Background Art

[0002] A valve position transmitter is a device used to monitor and transmit the position of valve switches, so that the control system can monitor and adjust the valve. Most of the current valve position transmitters are two-position type, with a detection switch installed in the fully open position and the fully closed position, which can detect whether the valve is fully open or fully closed. However, this method can only detect the open or closed state, and cannot specifically detect whether the valve is in other states. At the same time, some valve position transmitters convert the mechanical position of the valve into an electrical signal that can be read remotely, outputting 4~20mA, outputting 4mA signal when the valve is fully closed, outputting 20mA signal when the valve is fully open, and outputting corresponding current signals when the valve is in other states. They are overly dependent on electrical signal transmission, have poor stability, and are easily affected by the surrounding environment, which increases the overall maintenance cost. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a valve position transmitter, which solves the problem that the prior art can only detect the open or closed state, but cannot specifically detect that the valve is in other state positions, thus affecting the accuracy of the detection result.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] A valve position transmitter comprises a shell installed on the top of the valve switch, and an upper cover detachably installed on the top of the shell, wherein an inductive detection component for detecting the actual position of the valve switch is arranged on the inner side of the shell, wherein the inductive detection component comprises a rotating shaft arranged on the shell, and a fan-shaped turntable fixedly installed in the middle of the rotating shaft, wherein the rotation angle range of the fan-shaped turntable is set to 0-90°, wherein the bottom end of the rotating shaft passes through the shell and is rotationally connected thereto through a bearing, the bottom end of the rotating shaft is transmission-connected to the valve switch, the two side edges of the fan-shaped turntable are in a vertical state, and inductive magnetic heads are respectively arranged at both ends of the fan-shaped turntable, and switch quantity sensors are respectively fixedly arranged on both sides of the interior of the shell, wherein when the valve switch is opened, one of the inductive magnetic heads matches one of the switch quantity sensors, and when the valve switch is closed, the other inductive magnetic head matches the other switch quantity sensor, and an angle displacement sensor is arranged on one side of the rotating shaft.

[0006] As a further optimization solution of the present invention, a transmission assembly is provided between the angular displacement sensor and the rotating shaft, and the rotation speeds of the angular displacement sensor and the rotating shaft are equal.

[0007] As a further optimization scheme of the present invention, the transmission assembly includes a bevel gear 1 fixedly set on the rotating shaft, a connecting seat threadedly set on one side of the angle displacement sensor, and a bevel gear 2 fixed at one end of the connecting seat and meshingly connected with the bevel gear 1.

[0008] As a further optimization solution of the present invention, the bevel gear 1 and the bevel gear 2 are completely equal, and a ring frame with the same height as the upper cover is slidably provided on the connecting seat.

[0009] As a further optimization scheme of the present invention, a connecting gear is arranged at the bottom of the induction head, an arc groove matching the connecting gear is opened on the sector-shaped turntable, an arc rack fixed to the sector-shaped turntable is embedded on the inner side of the arc groove, and the connecting gear is meshingly connected with the arc rack.

[0010] As a further optimization solution of the present invention, a screw cap is provided at the bottom of the connecting gear, and the screw cap passes through the connecting gear and is threadedly connected to the bottom of the induction head.

[0011] As a further optimization solution of the present invention, a wiring terminal for connecting the positive and negative ends of a power supply is fixedly provided on one side of the interior of the shell.

[0012] As a further optimization solution of the present invention, a visible combination installation window is detachably installed on the top of the upper cover.

[0013] By means of the above technical solution, the present invention provides a valve position transmitter, which has at least the following beneficial effects compared with the prior art:

[0014] 1. The present invention detects the actual position of the valve switch by setting an induction detection component. When the valve switch is opened or closed, the open induction head is aligned with the open switch sensor, or the closed induction head is aligned with the closed switch sensor, thereby accurately detecting the switch state of the valve. At the same time, the angle displacement sensor is driven to rotate the same angle by the rotating shaft. The angle displacement sensor outputs a corresponding analog signal. Different openings output different signals, and a continuous analog signal can also be provided. This makes it more flexible and diverse in practical applications, and can meet the needs of switch control and precise adjustment at the same time, reducing the need for multiple devices and reducing the complexity of the system. The switch and analog signals are two-in-one, effectively saving on-site space and user costs.

[0015] 2. The present invention arranges a transmission component to drive the angular displacement sensor to rotate when the rotating shaft rotates, so that the output analog signal can accurately reflect the change of the valve position, such as the real-time position change from 0 to 90°. This continuous feedback signal can provide the control system with more detailed valve status data and support more precise adjustment and control, especially in situations where precise control of flow or pressure is required.

[0016] 3. For some application scenarios, the present invention facilitates the detection of whether the valve is fully open or closed through simple switch control; and for some occasions requiring precise flow control, the analog signal provides detailed valve position feedback, allowing the valve position transmitter to adapt to a wider range of control needs. Through continuous 4-20mA analog signals, the system can monitor the specific position of the valve in real time, which is crucial in automated control systems, especially in environments that require precise adjustment or ensure stable system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the explosion of the induction detection component of the present invention;

[0021] Figure 4 It is a schematic structural diagram of the housing of the present invention.

[0022] In the figure: 1. valve switch; 2. housing; 3. upper cover;

[0023] 4. Induction detection component; 41. Rotating axis; 42. Fan-shaped turntable;

[0024] 43, inductive head; 431, connecting gear; 432, arc groove; 433, arc rack; 434, screw cap;

[0025] 44. Switching quantity sensor; 45. Angle displacement sensor;

[0026] 46, transmission assembly; 461, bevel gear one; 462, connecting seat; 463, bevel gear two; 464, annular frame;

[0027] 5. Visual combination installation window; 6. Wiring terminals. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] First embodiment

[0030] Current valve position transmitters can usually only detect the state of the switch, or detect by converting the mechanical position of the valve into an electrical signal that can be read remotely. However, these methods have certain limitations and cannot have both switch signal and analog signal functions at the same time, resulting in instability in detection and affecting the accuracy of the detection results. In order to provide higher flexibility and accuracy for the automation system by outputting switch signals and analog signals at the same time, refer to Figure 1 - Figure 4 The present embodiment provides a valve position transmitter, including a shell 2 installed on the top of the valve switch 1, and an upper cover 3 is detachably installed on the top of the shell 2 by multiple bolts. A visual combination installation window 5 is detachably installed on the top of the upper cover 3. The operator can quickly check the status of the valve position transmitter through the window without opening the device or performing complicated operations, which helps to improve the maintenance efficiency and response speed of the equipment, especially when troubleshooting or daily inspection is required, unnecessary downtime can be avoided. A wiring terminal 6 for connecting the positive and negative terminals of the power supply is also fixedly provided on one side of the interior of the shell 2.

[0031] In order to simultaneously meet the requirements of switch control and precise adjustment, reduce the need for multiple devices, and reduce the complexity of the system, an induction detection component 4 for detecting the actual position of the valve switch 1 is provided on the inner side of the shell 2. The induction detection component 4 includes a rotating shaft 41 provided on the shell 2, and a fan-shaped turntable 42 fixedly installed in the middle of the rotating shaft 41. The rotation angle range of the fan-shaped turntable 42 is set to 0-90°. The bottom end of the rotating shaft 41 passes through the shell 2 and is rotatably connected thereto through a bearing. The bottom end of the rotating shaft 41 is transmission-connected to the valve switch 1. The top of the valve switch 1 has a groove matching the bottom end of the rotating shaft 41, so that when the valve switch 1 rotates, the rotating shaft 41 is driven to rotate. The two sides of the fan-shaped turntable 42 are in a vertical state. When the valve switch 1 rotates, the fan-shaped turntable 42 is driven to rotate through the rotating shaft 41, thereby detecting the actual rotation angle of the valve switch 1.

[0032] Inductive heads 43 are respectively provided at both ends of the sector-shaped turntable 42, and switch sensors 44 are respectively fixedly provided on both sides of the interior of the shell 2. When the valve switch 1 is opened, one of the inductive heads 43 matches one of the switch sensors 44, and when the valve switch 1 is closed, the other inductive head 43 matches the other switch sensor 44. When the valve switch 1 rotates, the position changes of the two inductive heads 43 and the two switch sensors 44 are used to determine whether the valve switch 1 is in an open or closed state. An angle displacement sensor 45 is provided on one side of the rotating shaft 41. When the position of the angle displacement sensor 45 changes, the corresponding analog signal output by the angle displacement sensor 45 also changes accordingly. Different openings output different signals, which can accurately reflect the change of the valve position, such as the real-time position change from 0 to 90°.

[0033] Maintenance personnel can quickly confirm the switch status of the valve through the switch signal, and the specific position of the valve can be determined through the analog signal, which is convenient for diagnosis and maintenance.

[0034] Second embodiment

[0035] In order to provide the control system with more detailed valve status data and support more precise regulation and control, refer to Figure 3 In this embodiment, on the basis of the first embodiment, a transmission assembly 46 is arranged between the angular displacement sensor 45 and the rotating shaft 41, and the rotation speeds of the angular displacement sensor 45 and the rotating shaft 41 are equal. Specifically, the transmission assembly 46 includes a bevel gear 1 461 fixedly arranged on the rotating shaft 41, a connecting seat 462 threadedly arranged on one side of the angular displacement sensor 45, and a bevel gear 2 463 fixed at one end of the connecting seat 462 and meshingly connected with the bevel gear 1 461. The bevel gear 1 461 and the bevel gear 2 463 are completely equal. A ring frame 464 with the height of the upper cover 3 is also slidably arranged on the connecting seat 462 to ensure that the connecting seat 462 can stably rotate around the rotating shaft 41. When the bevel gear 1 461 drives the bevel gear 2 463 to rotate, the rotation angles thereof are consistent.

[0036] When the rotating shaft 41 rotates, it drives the bevel gear 1 461 to rotate, and the bevel gear 1 461 drives the bevel gear 2 463 meshing with it to rotate, and the bevel gear 2 463 drives the angle displacement sensor 45 to rotate through the connecting seat 462. Since the rotation angles of the bevel gear 1 461 and the bevel gear 2 463 are equal, the rotation angles of the angle displacement sensor 45 and the rotating shaft 41 are also equal. When the opening of the valve switch 1 is 50°, the rotation angle of the rotating shaft of the valve position switch is 50°. Through the uniform speed transmission of the bevel gear 1 461 and the bevel gear 2 463, the angle displacement sensor 45 also rotates 50°. The angle displacement sensor 45 outputs a corresponding analog signal, and different openings output different signals.

[0037] Third embodiment

[0038] In order to expand the application range of the valve position transmitter, refer to Figure 3 In this embodiment, on the basis of the second embodiment, a connecting gear 431 is provided at the bottom of the inductive magnetic head 43, an arcuate groove 432 matching the connecting gear 431 is provided on the sector-shaped turntable 42, an arcuate rack 433 fixed to the sector-shaped turntable 42 is embedded on the inner side of the arcuate groove 432, and the connecting gear 431 is meshedly connected with the arcuate rack 433, a screw cap 434 is provided at the bottom of the connecting gear 431, and the screw cap 434 penetrates the connecting gear 431 and is threadedly connected with the bottom of the inductive magnetic head 43, and the two inductive magnetic heads 43 can adjust the actual position on the sector-shaped turntable 42 to adapt to the switching amount of valve switches 1 of different specifications.

[0039] In the present invention, when the valve switch 1 is opened or closed, the open induction head 43 is aligned with the open switch sensor 44, or the closed induction head 43 is aligned with the closed switch sensor 44, thereby accurately detecting the switch state of the valve. At the same time, the rotating shaft 41 drives the angle displacement sensor 45 to rotate the same angle and output a corresponding analog signal. It combines the switch signal and the analog signal into one, which can save on-site use space and user costs.

[0040] When the valve switch 1 is in use, it will rotate a certain angle when it is opened or closed, thereby driving the rotating shaft 41 on its top to rotate by the same angle, and the rotating shaft 41 drives the fan-shaped turntable 42 thereon to rotate, and the fan-shaped turntable 42 drives the two inductive heads 43 thereon to rotate. After the positions of the two inductive heads 43 and the two switch sensors 44 change relatively, it can be determined whether the valve switch 1 is in an open or closed state, and at the same time, the rotating shaft 41 drives the bevel gear 1 461 in the middle thereof to rotate, and the bevel gear 1 461 drives the bevel gear 2 463 meshing with it to rotate, and the bevel gear 2 463 drives the connecting seat 462 to rotate around the rotating shaft 41, and the connecting seat 462 drives the angle displacement sensor 45 to rotate by the same angle, and the angle displacement sensor 45 outputs a corresponding analog signal, so that it can meet the switch control and precise adjustment requirements at the same time.

[0041] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve position transmitter, comprising a housing (2) mounted on the top of a valve switch (1), and an upper cover (3) detachably mounted on the top of the housing (2), characterized in that: An inductive detection component (4) for detecting the actual position of the valve switch (1) is arranged on the inner side of the housing (2); The inductive detection component (4) comprises a rotating shaft (41) arranged on the housing (2), a fan-shaped rotating disk (42) fixedly mounted in the middle of the rotating shaft (41), the rotating angle range of the fan-shaped rotating disk (42) being set to 0-90°, wherein the bottom end of the rotating shaft (41) passes through the housing (2) and is rotatably connected thereto via a bearing, the bottom end of the rotating shaft (41) is transmission-connected to the valve switch (1), the two sides of the fan-shaped rotating disk (42) are in a vertical state, the two ends of the fan-shaped rotating disk (42) are respectively provided with inductive magnetic heads (43), and the two sides of the interior of the housing (2) are respectively fixedly provided with switch quantity sensors (44); When the valve switch (1) is opened, one of the inductive magnetic heads (43) matches one of the switch quantity sensors (44); when the valve switch (1) is closed, the other inductive magnetic head (43) matches the other switch quantity sensor (44); and an angle displacement sensor (45) is provided on one side of the rotating shaft (41).

2. The valve position transmitter according to claim 1, characterized in that: A transmission assembly (46) is provided between the angular displacement sensor (45) and the rotating shaft (41), and the rotation speeds of the angular displacement sensor (45) and the rotating shaft (41) are equal.

3. The valve position transmitter according to claim 2, characterized in that: The transmission assembly (46) comprises a bevel gear 1 (461) fixedly mounted on the rotating shaft (41), a connecting seat (462) threadedly mounted on one side of the angular displacement sensor (45), and a bevel gear 2 (463) fixed to one end of the connecting seat (462) and meshingly connected to the bevel gear 1 (461).

4. The valve position transmitter according to claim 3, characterized in that: The bevel gear 1 (461) and the bevel gear 2 (463) are completely equal, and a ring frame (464) having the same height as the upper cover (3) is slidably arranged on the connecting seat (462).

5. The valve position transmitter according to claim 1, characterized in that: A connecting gear (431) is arranged at the bottom of the inductive magnetic head (43), an arc-shaped groove (432) matching the connecting gear (431) is opened on the sector-shaped rotating disk (42), an arc-shaped rack (433) fixed to the sector-shaped rotating disk (42) is embedded inside the arc-shaped groove (432), and the connecting gear (431) is meshedly connected with the arc-shaped rack (433).

6. The valve position transmitter according to claim 5, characterized in that: A screw cap (434) is provided at the bottom of the connecting gear (431), and the screw cap (434) passes through the connecting gear (431) and is threadedly connected to the bottom of the inductive magnetic head (43).

7. The valve position transmitter according to claim 1, characterized in that: A wiring terminal (6) for connecting the positive and negative ends of a power source is also fixedly provided on one side of the interior of the housing (2).

8. The valve position transmitter according to claim 1, characterized in that: A visual combination installation window (5) is detachably installed on the top of the upper cover (3).

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