Valve position multi-site feedback device for valve

Abstract

The utility model provides a valve location multi-site feedback device for a valve, the valve comprises a valve body, a valve core and a valve shaft, the valve shaft drives the valve core to rotate in the valve body to realize the adjustment of the opening degree of the valve, the valve location multi-site feedback device comprises a swing rod, a travel switch and a collision block plate which are arranged outside the valve, the collision block plate is fixed to the valve body, and one end of the swing rod is fixed to the valve shaft and can swing along with rotation of the valve shaft. A telescopic plunger is arranged at one end of the travel switch, the other end of the travel switch is mounted on the swing rod, and the travel switch can swing along with the swing rod; a plurality of protrusions are arranged on the surface of the collision block plate, and in the swing process of the travel switch, the plunger can collide with the protrusions and retract when colliding with the protrusions, and the plunger extends and returns to the initial state when leaving the contact with the protrusions. Compared with the prior art, the device provided by the utility model is simple in structure, gives consideration to factors such as reliability and cost, and is very suitable for segmented adjustment occasions.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve position multi-point feedback devices, in particular to a valve position multi-point feedback device for a valve. Background Art

[0002] Currently, most rotary valves lack feedback signals, or only provide signals indicating fully open and fully closed positions, with no intermediate position feedback. Even if other methods are used to obtain valve position feedback, they may not be very reliable due to factors such as operating temperature. If a regulating valve is used, the cost is relatively high, especially when used in large quantities, and its operating temperature is also limited. Utility Model Content

[0003] Purpose of the utility model: In order to solve the defects of the prior art, the utility model provides a valve position multi-point feedback device for a valve.

[0004] Technical solution: To achieve the above purpose, the present invention adopts the following technical solution:

[0005] A valve position multi-point feedback device for a valve, the valve comprising a valve body, a valve core and a valve shaft, the valve shaft drives the valve core to rotate in the valve body to adjust the valve opening, the valve position multi-point feedback device comprising a rocker arm, a travel switch and a collision plate arranged outside the valve, the collision plate being fixed to the valve body, one end of the rocker arm being fixed to the valve shaft and being able to swing with the rotation of the valve shaft; a retractable plunger being provided at one end of the travel switch and the other end being mounted on the rocker arm, the travel switch being able to swing with the rocker arm; a plurality of protrusions being provided on the surface of the collision plate, the travel switch being able to hit each protrusion during its swinging process, and being able to retract when hitting each protrusion, and being able to extend when leaving contact with the protrusion, and being able to return to its initial state.

[0006] As a specific implementation scheme, the travel switch transmits signals through the extension and retraction of the plunger. When the plunger retracts, the travel switch closes and transmits a closed signal. When the plunger extends back to the initial state, the travel switch opens and transmits an open signal.

[0007] As a specific implementation scheme, a roller is provided at the end of the plunger, and the roller strikes each protrusion on the striker plate.

[0008] As a specific implementation scheme, in order to improve the accuracy or reliability of valve position feedback, several travel switches can be arranged within a 360° range.

[0009] As a specific implementation, the protrusions are evenly or unevenly distributed on the surface of the collision block plate.

[0010] As a specific embodiment, the number of the protrusions is 2 or more.

[0011] As an implementation scheme, the collision block plate is in an arc-shaped or circular structure, the center of which is located on the central axis of the valve shaft, and the protrusion is located on the inner wall or side wall of the arc-shaped or circular structure.

[0012] Furthermore, when the collision block plate is an arc-shaped structure, its arc is 0°-360°, preferably 10°-350°.

[0013] As another embodiment, the collision block plate is regular or irregular in shape, the protrusions are located on the surface of the collision block plate, and the distribution trajectory of each protrusion is arc-shaped, with its center located on the central axis of the valve shaft, that is, the distribution trajectory of the protrusion is concentric with the valve shaft.

[0014] Beneficial Effects: Compared with existing technologies, the device of this utility model has a simple structure, taking into account factors such as reliability and cost, and is very suitable for applications where segmented adjustment is required. It is suitable for various applications requiring feedback of the valve intermediate position for control or display purposes. It is applicable to rotary valves such as electric, pneumatic, and hydraulic butterfly valves, flap valves, louver valves, and ball valves whose opening changes with valve shaft rotation. The device can achieve valve position adjustment within the rotation range, and is particularly suitable for applications where segmented valve opening adjustment is required and investment is limited. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the device of the utility model (travel switch closed state).

[0016] Figure 2 This is a structural diagram of the device of the utility model (travel switch is open). DETAILED DESCRIPTION

[0017] The device of the utility model is further described below with reference to the accompanying drawings.

[0018] In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "top", "bottom", "inside", "outside", etc. indicating orientations or positional relationships, they are based on the orientations or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent.

[0019] Example 1

[0020] A multi-point feedback device for valve position, the valve includes a valve body, a valve core and a valve shaft, the valve shaft drives the valve core to rotate in the valve body to adjust the valve opening, such as Figure 1 As shown, the valve position multi-point feedback device includes a rocker rod 1, a travel switch 2 and a striker plate 3 arranged outside the valve.

[0021] The striker plate 3 is fixed on the valve body, and one end of the rocker arm 1 is fixed on the valve shaft and can swing with the rotation of the valve shaft.

[0022] One end of travel switch 2 is equipped with a retractable plunger 2-1, and the other end is mounted on rocker 1. A roller 2-2 is provided at the end of plunger 2-1, allowing travel switch 2 to swing along with rocker 1. Travel switch 2 transmits signals through the extension and retraction of plunger 2-1. When plunger 2-1 retracts, the travel switch closes and transmits an off signal. When plunger 2-1 extends back to its initial position, the travel switch opens and transmits an on signal.

[0023] Several protrusions 3-1 are provided on the surface of the impact plate 3. When the travel switch 2 is swinging, the plunger 2-1 can hit each protrusion 3-1 on the impact plate 3 through the roller 2-2, and retract when hitting each protrusion 3-1, extend when leaving contact with the protrusion 3-1, and return to the initial state.

[0024] To improve the accuracy or reliability of valve position feedback, a plurality of travel switches 2 can be arranged within a 360° range. The protrusions 3-1 can be evenly or unevenly distributed on the surface of the striker plate 3. The number of protrusions 3-1 is 2 or more.

[0025] In one embodiment, the striker plate 3 has an arcuate or circular structure, with its center located on the central axis of the valve shaft, and the protrusions 3-1 located on the inner wall or side wall of the arcuate or circular structure. When the striker plate 3 is an arcuate structure, its curvature ranges from 0° to 360°, preferably from 10° to 350°, and can be adjusted as needed. Its radius R can be increased or decreased depending on the number of protrusions.

[0026] As another embodiment, the collision block plate 3 has a regular or irregular shape, the protrusions 3-1 are located on the surface of the collision block plate 3, and the distribution trajectory of each protrusion 3-1 is arc-shaped, and the center of the circle is located on the central axis of the valve shaft, that is, the distribution trajectory of the protrusion 3-1 is concentric with the valve shaft, and there is no special requirement for the shape of the collision block plate 3.

[0027] The working principle and process of the above device are as follows:

[0028] When the valve shaft rotates, the swing rod 1 and the travel switch 2 are driven to swing together, and the roller 2-2 on the plunger 2-1 at the end of the travel switch 2 hits the protrusion 3-1 on the collision plate 3, the plunger 2-1 retracts, the travel switch is closed, and the closing signal is transmitted ( Figure 1 ); When the valve shaft continues to rotate, the roller 2-2 gradually disengages from the protrusion 3-1 on the collision plate 3, the plunger 2-1 extends back to its original state, the travel switch opens, and an opening signal is transmitted ( Figure 2 ).

[0029] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, such modifications or improvements, without departing from the spirit of the present invention, are within the scope of protection claimed herein.

Claims

1. A multi-point feedback device for valve position, wherein the valve comprises a valve body, a valve core and a valve shaft, wherein the valve shaft drives the valve core to rotate in the valve body to adjust the valve opening, characterized in that: The valve position multi-point feedback device comprises a rocker (1), a travel switch (2) and a collision plate (3) arranged outside the valve, wherein the collision plate (3) is fixed on the valve body, and one end of the rocker (1) is fixed on the valve shaft and can swing with the rotation of the valve shaft; one end of the travel switch (2) is provided with a retractable plunger (2-1), and the other end is installed on the rocker (1), and the travel switch (2) can swing together with the rocker (1); a plurality of protrusions (3-1) are provided on the surface of the collision plate (3), and during the swinging process of the travel switch (2), the plunger (2-1) can hit each protrusion (3-1), and retract when hitting each protrusion (3-1), and extend when leaving contact with the protrusion (3-1), and return to the initial state.

2. The valve position multi-point feedback device for a valve according to claim 1, characterized in that: The travel switch (2) transmits signals through the extension and retraction of the plunger (2-1); when the plunger (2-1) retracts, the travel switch closes and transmits an off signal; when the plunger (2-1) extends back to the initial state, the travel switch opens and transmits an on signal.

3. The valve position multi-point feedback device for a valve according to claim 1, characterized in that: A roller (2-2) is provided at the end of the plunger (2-1), and the roller (2-2) strikes against each protrusion (3-1) on the striker plate (3).

4. The valve position multi-point feedback device for a valve according to claim 1, characterized in that: A plurality of travel switches (2) are arranged within a range of 360°.

5. The valve position multi-point feedback device for a valve according to claim 1, characterized in that: The protrusions (3-1) are evenly or unevenly distributed on the surface of the collision block plate (3).

6. The valve position multi-point feedback device for a valve according to claim 1, characterized in that: The number of the protrusions (3-1) is 2 or more.

7. The valve position multi-point feedback device for a valve according to claim 1, characterized in that: The collision block plate (3) is in an arc-shaped or circular structure, the center of which is located on the central axis of the valve shaft, and the protrusion (3-1) is located on the inner wall or side wall of the arc-shaped or circular structure.

8. The valve position multi-point feedback device for a valve according to claim 7, characterized in that: When the collision block plate (3) is an arc-shaped structure, its arc is 0°-360°.

9. The valve position multi-point feedback device for a valve according to claim 1, characterized in that: The collision block plate (3) is of regular or irregular shape, the protrusions (3-1) are located on the surface of the collision block plate (3), and the distribution track of each protrusion (3-1) is arc-shaped, with the center of the circle located on the central axis of the valve shaft.

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