Abnormal monitoring device for pneumatic valve

Abstract

The utility model relates to the technical field of valves, and discloses a pneumatic valve abnormity monitoring device which comprises an actuator, a valve part, a grating disc, a photoelectric sensor and a controller. The actuator comprises an actuator body and an actuator shaft, and the actuator shaft and the valve part are in synchronous transmission connection with the actuator body; the grating disc is fixedly connected with the actuator shaft, the two photoelectric sensors are arranged on the actuator body at intervals adjacent to the grating disc, and the grating disc is provided with two first notches; the controller is respectively connected with the actuator and the photoelectric sensor; the actuator shaft can drive the grating disc to rotate to a first state or a second state, and when the grating disc is in the first state, the valve part is in one of an opening state and a closing state; and when the grating disc is in the second state, the valve part is in the other one of the opening state and the closing state. Whether the valve part is abnormal or not can be pre-judged according to whether the switching time of the grating disc between the first state and the second state exceeds a set time range or not.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a pneumatic valve abnormality monitoring device. Background Art

[0002] Cleaning equipment such as cleaners are usually used in OLED cleaning projects. Such equipment usually has a liquid or gas pipeline structure with pneumatic valves installed on the pipeline to control the flow of liquid or gas in the pipeline. Figure 1 As shown, a conventional pneumatic valve consists of an actuator 1' and a valve unit 2', connected by a transmission mechanism. The actuator 1' includes an actuator body 11', a transmission structure (not shown), and an actuator shaft 12'. The actuator body 11' has two variable cavities (not shown). By controlling the expansion / compression of the two cavities, the transmission structure drives the valve unit 2' to open and close, and the actuator shaft 12' to rotate synchronously. By observing the rotation angle of the actuator shaft 12', the open / close state of the valve unit 2' can be determined. When this type of pneumatic valve malfunctions, the valve unit 2' will malfunction, resulting in excessive or insufficient use of gas or liquid, affecting cleaning quality. Utility Model Content

[0003] The purpose of the utility model is to provide a pneumatic valve abnormality monitoring device, which can predict abnormal phenomena of the valve.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] Provided is a pneumatic valve abnormality monitoring device, comprising:

[0006] An actuator and a valve portion, wherein the actuator comprises an actuator body and an actuator shaft mounted on the actuator body, wherein the actuator shaft and the valve portion are synchronously driven and connected to the actuator body;

[0007] A grating disk and two photoelectric sensors, wherein the grating disk is fixedly connected to the actuator shaft, and the two photoelectric sensors are spaced apart and disposed on the actuator body adjacent to the grating disk. The photoelectric sensors have a transmitter and a receiver spaced apart, and a sensing area is formed between the transmitter and the receiver. The grating disk is provided with two first notches along its thickness direction.

[0008] a controller, the controller being connected to the actuator and the photoelectric sensor respectively;

[0009] The actuator shaft is capable of driving the grating disk to rotate to a first state or a second state. When the grating disk is in the first state, each of the two first notches is located in the sensing area of ​​one of the photoelectric sensors, and the valve portion is in one of an open state and a closed state. When the grating disk is in the second state, one of the first notches is located in the sensing area of ​​one of the photoelectric sensors, and the other first notch is located in the non-sensing area of ​​the other photoelectric sensor, and the valve portion is in the other of an open state and a closed state.

[0010] The pneumatic valve abnormality monitoring device is used to pre-judge whether the valve part is abnormal based on whether the switching time of the grating disk between the first state and the second state exceeds a set time range.

[0011] As a further solution of the pneumatic valve abnormality monitoring device, the rotation angle of the grating disk when switching between the first state and the second state is 90°, the angle between the center lines of the two first notches is 90°, and the two photoelectric sensors are distributed at a 90° angle on the edge of the grating disk.

[0012] As a further solution of the pneumatic valve abnormality monitoring device, the grating disk is circular, and the first notch is located at the edge of the grating disk.

[0013] As a further solution of the pneumatic valve abnormality monitoring device, the grating disk is also provided with a second notch. The rotation angle of the grating disk when switching between the first state and the second state is 90°, the angle between the center lines of the two first notches is 90°, the second notch is symmetrical with one of the first notches about the center line of the other first notch, and the two photoelectric sensors are distributed at an angle of 180° on the edge of the grating disk.

[0014] As a further solution of the pneumatic valve abnormality monitoring device, the grating disk is circular, and the first notch and the second notch are respectively located at the edge of the grating disk.

[0015] As a further solution of the pneumatic valve abnormality monitoring device, a slot is provided on the side of the actuator shaft facing the grating disk, and a snap-fit ​​protrusion is provided on the side of the grating disk facing the slot. The snap-fit ​​protrusion is snap-fitted with the slot to limit the rotation of the grating disk relative to the actuator shaft.

[0016] As a further solution of the pneumatic valve abnormality monitoring device, a snap-fit ​​protrusion is provided on the side of the actuator shaft facing the grating disk, and a snap-fit ​​groove is provided on the side of the grating disk facing the actuator shaft. The snap-fit ​​protrusion is snap-fitted with the snap-fit ​​groove to limit the rotation of the grating disk relative to the actuator shaft.

[0017] As a further solution of the pneumatic valve abnormality monitoring device, the clamping protrusion is spaced apart from the photoelectric sensor.

[0018] As a further solution of the pneumatic valve abnormality monitoring device, the grating disk is fixedly connected to the actuator shaft by screws.

[0019] As a further solution of the pneumatic valve abnormality monitoring device, it also includes a mounting seat, which has a one-to-one correspondence with the photoelectric sensor, and the photoelectric sensor is fixed to the actuator body through the mounting seat.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] In the present invention, when the sensing area of ​​the photoelectric sensor is free of obstructions, the receiving unit can receive the signal emitted by the transmitting unit. However, when the sensing area of ​​the photoelectric sensor is blocked by the grating disk, the receiving unit cannot receive the signal from the transmitting unit. The controller determines the positions of the two first notches of the grating disk based on whether the two photoelectric sensors can normally receive signals, that is, determines whether the grating disk is in the first state or the second state, and the first state and the second state of the grating disk correspond to the opening and closing of the valve unit, respectively. The controller monitors the interval time when the grating disk switches from the first state to the second state or from the second state to the first state, and predicts whether the valve unit is abnormal based on whether the interval time exceeds the range of the normal opening and closing interval time of the valve unit. Based on the abnormal signal, the staff can promptly inspect and maintain the valve unit to avoid insufficient or excessive fluid in the pipeline due to abnormality of the pneumatic valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 It is a side view schematic diagram of a pneumatic valve in the prior art.

[0024] Figure 2 This is a side view schematic diagram of a pneumatic valve abnormality monitoring device according to the first embodiment of the present invention.

[0025] Figure 3 This is a schematic top view of the grating disk according to the first embodiment of the present invention.

[0026] Figure 4 Schematic top view of the pneumatic valve abnormality monitoring device (the grating disk is in the first state) according to the first embodiment of the present invention.

[0027] Figure 5 Schematic top view of the pneumatic valve abnormality monitoring device (the grating disk is in the second state) according to the first embodiment of the present invention.

[0028] Figure 6 This is a schematic top view of the actuator according to the first embodiment of the present invention.

[0029] Figure 7 This is a bottom view of the grating disk according to the first embodiment of the present invention.

[0030] Figure 8 This is a side view schematic diagram of a pneumatic valve abnormality monitoring device according to the second embodiment of the present invention.

[0031] Figure 9 This is a schematic top view of the grating disk according to the second embodiment of the present invention.

[0032] Figure 10 Schematic top view of the pneumatic valve abnormality monitoring device (the grating disk is in the first state) according to the second embodiment of the present invention.

[0033] Figure 11 Schematic top view of the pneumatic valve abnormality monitoring device (the grating disk is in the second state) according to the second embodiment of the present invention.

[0034] Figure 1 middle:

[0035] 1', actuator; 11', actuator body; 12', actuator shaft; 2', valve part.

[0036] Figures 2 to 11 middle:

[0037] 100. Actuator; 110. Actuator body; 120. Actuator shaft; 1201. Slot; 200. Valve unit; 300. Grating disk; 301. First notch; 302. Second notch; 303. Snap-fit ​​protrusion; 400. Photoelectric sensor; 410. Transmitter; 420. Receiver; 500. Screw; 600. Mounting base. DETAILED DESCRIPTION

[0038] The advantages and features of the present invention and methods for achieving them will become apparent with reference to the embodiments described in detail below in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in a variety of different forms. These embodiments are provided merely to complete the disclosure of the present invention and enable those skilled in the art to fully understand the scope of the present invention. The present invention is limited only by the scope of the claims. The same reference numerals represent the same components throughout the specification.

[0039] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0040] Example 1

[0041] like Figures 2 to 7As shown, the pneumatic valve abnormality monitoring device of this embodiment includes an actuator 100, a valve part 200, a grating disk 300, a photoelectric sensor 400 and a controller.

[0042] The actuator 100 includes an actuator body 110 and an actuator shaft 120 mounted on the actuator body 110. The actuator shaft 120 and the valve portion 200 are synchronously connected to the actuator body 110. The grating disk 300 is fixedly connected to the actuator shaft 120. There are two photoelectric sensors 400. The two photoelectric sensors 400 are spaced apart and arranged on the actuator body 110 adjacent to the grating disk 300. The photoelectric sensors 400 have a transmitter 410 and a receiver 420 spaced apart. A sensing area is formed between the transmitter 410 and the receiver 420. The grating disk 300 is provided with two first notches 301 along its thickness direction. The controller is connected to the actuator 100 and the photoelectric sensors 400, respectively.

[0043] The actuator shaft 120 can drive the grating disk 300 to rotate to a first state or a second state. When the grating disk 300 is in the first state, each of the two first notches 301 is located in the sensing area of ​​one of the photoelectric sensors 400, and the valve part 200 is in one of the open state and the closed state; when the grating disk 300 is in the second state, one of the first notches 301 is located in the sensing area of ​​one of the photoelectric sensors 400, and the other first notch 301 is located in the non-sensing area of ​​the other photoelectric sensor 400, and the valve part 200 is in the other of the open state and the closed state.

[0044] The pneumatic valve abnormality monitoring device is used to predict whether the valve part 200 is abnormal based on whether the switching time of the grating disk 300 between the first state and the second state exceeds a set time range.

[0045] In this embodiment, Figure 2As shown, the transmitter 410 and receiver 420 of the photoelectric sensor 400 are spaced apart. When there is no obstruction between the transmitter 410 and the receiver 420, the receiver 420 can receive the signal after the transmitter 410 sends it. However, when there is an obstruction (the grating disk 300) in the sensing area of ​​the photoelectric sensor 400, the receiver 420 cannot receive the signal from the transmitter 410. Based on whether the two photoelectric sensors 400 can normally receive signals, the controller determines the position of the two first notches 301 of the grating disk 300, that is, whether the grating disk 300 is in the first state or the second state. The first and second states of the grating disk 300 correspond to the open and closed states of the valve unit 200, respectively. Generally, when a pneumatic valve is malfunctioning, the interval between the valve unit 200 switching from the open state to the closed state, or vice versa, will be longer than normal. In this embodiment, the controller can monitor the interval time when the grating disk 300 switches from the first state to the second state or from the second state to the first state, and predict whether the valve part 200 is abnormal based on whether the interval time exceeds the range of the normal switch switching interval time. The staff can then promptly inspect and maintain the valve part 200 based on the abnormal signal.

[0046] In this embodiment, when both first notches 301 are respectively located within the sensing areas of the photoelectric sensors 400, the valve portion 200 is in an open state. When only one of the first notches 301 is respectively located within the sensing areas of one of the photoelectric sensors 400, the valve portion 200 is in a closed state. In other embodiments, when both first notches 301 are respectively located within the sensing areas of one of the photoelectric sensors 400, the valve portion 200 is in a closed state, and when only one of the first notches 301 is respectively located within the sensing areas of one of the photoelectric sensors 400, the valve portion 200 is in an open state. The details are not further described.

[0047] Next, this embodiment will be described in detail by taking the case where the two first notches 301 are respectively located in the sensing areas of the photoelectric sensors 400 and the valve portion 200 is in the open state as an example.

[0048] The rotation angle of the grating disk 300 when switching between the first state and the second state is 90°. Figure 2 and Figure 3 As shown, the included angle between the center lines of the two first notches 301 is 90°, and the two photoelectric sensors 400 are distributed at an angle of 90° on the edge of the grating disk 300 .

[0049] like Figure 4As shown, the initial state of the grating disc 300 is the first state, at which time the two first notches 301 of the grating disc 300 are respectively located in the sensing area of ​​one of the photoelectric sensors 400, and the valve portion 200 is in the open state; when the controller drives the actuator shaft 120 to drive the grating disc 300 along the Figure 4 When the grating disk 300 is rotated 90° clockwise, one of the first notches 301 is rotated from the sensing area of ​​one photoelectric sensor 400 to the sensing area of ​​another photoelectric sensor 400, and the other first notch 301 is rotated to the non-sensing area of ​​the photoelectric sensor 400, that is, the sensing area of ​​the photoelectric sensor 400 is blocked by the grating disk 300. Figure 5 As shown, at this time, the grating disc 300 switches from the first state to the second state, and correspondingly, the valve portion 200 is in the closed state; when the controller drives the actuator shaft 120 to drive the grating disc 300 along Figure 5 When the counterclockwise direction rotates 90 degrees, the two first notches 301 are respectively rotated to the sensing area of ​​one of the photoelectric sensors 400, such as Figure 4 As shown, the grating disk 300 switches from the second state to the first state. The controller determines whether the valve unit 200 is abnormal based on whether the interval time for the grating disk 300 to switch from the first state to the second state or from the second state to the first state exceeds the normal interval time range, and issues a warning signal to remind the staff to inspect and maintain the pneumatic valve.

[0050] Furthermore, the grating disk 300 is circular, and the first notch 301 is located at the edge of the grating disk 300. In this embodiment, by providing the first notch 301 at the edge of the grating disk 300, the photoelectric sensor 400 is installed on the actuator body 110 adjacent to the outer periphery of the grating disk 300. After installation, the first notch 301 can be selectively positioned within the sensing area of ​​the photoelectric sensor 400 by controlling the rotation of the grating disk 300, thereby facilitating the creation of the first notch 301 and the installation of the photoelectric sensor 400.

[0051] In this embodiment, Figure 6 and Figure 7 As shown, a slot 1201 is provided on the side of the actuator shaft 120 away from the actuator body 110 , and a locking protrusion 303 is provided on the side of the grating disk 300 facing the slot 1201 . The locking protrusion 303 is engaged with the slot 1201 to limit the rotation of the grating disk 300 relative to the actuator shaft 120 .

[0052] It is understandable that by providing the snap-fitting slot 1201 and the snap-fitting protrusion 303 , the installation convenience of the grating disc 300 can be improved.

[0053] Furthermore, the length of the slot 1201 extends radially along the actuator shaft 120, and correspondingly, the length of the snap-fit ​​protrusion 303 extends radially along the grating disk 300, and the snap-fit ​​protrusion 303 is spaced apart from the photoelectric sensor 400, so as to facilitate the alignment and installation of the snap-fit ​​protrusion 303 and the slot 1201, while avoiding contact between the snap-fit ​​protrusion 303 and the photoelectric sensor 400 and affecting the normal rotation of the grating disk 300.

[0054] This embodiment is not limited to providing the latching groove 1201 on the actuator shaft 120 and the engaging protrusion 303 on the grating disk 300. In other embodiments, the engaging protrusion may be provided on the side of the actuator shaft 120 facing the grating disk 300, and a latching groove that plugs into and engages with the engaging protrusion may be provided on the side of the grating disk 300 facing the actuator shaft 120. This can also achieve engaging of the grating disk 300 with the actuator shaft 120. The structure of the latching groove and engaging protrusion is not shown in the figure, and those skilled in the art can obtain the corresponding structure based on the concept of this embodiment.

[0055] Furthermore, the grating disk 300 is fixedly connected to the actuator shaft 120 by screws 500. After the grating disk 300 and the actuator shaft 120 are clamped together, the screws 500 are tightened to further improve the connection stability between the grating disk 300 and the actuator shaft 120.

[0056] This embodiment of the pneumatic valve anomaly monitoring device is an improvement on existing pneumatic valves. To accommodate the height of the actuator shaft 120 and ensure that the edge of the grating disk 300 mounted on the actuator shaft 120 is within the sensing area of ​​the photoelectric sensor 400 during rotation, this embodiment adds a mounting base 600 to increase the height of the photoelectric sensor 400.

[0057] like Figure 2 As shown, the number of the mounting seats 600 in this embodiment is two, and the positions of the two mounting seats 600 correspond one-to-one to the photoelectric sensors 400 . The photoelectric sensors 400 are fixed to the actuator body 110 through the mounting seats 600 .

[0058] The pneumatic valve anomaly monitoring device of this embodiment further includes a transmission structure (not shown) located within the actuator body 110. The actuator shaft 120 is connected to the valve portion 200 via the transmission structure. The pneumatic valve of this embodiment is conventional in the art, and therefore, the internal structure of the actuator body 110 will not be described in detail.

[0059] The transmission structure drives the valve unit 200 and the grating disk 300 to rotate synchronously. The transmission structure and its rotational principle are conventional structures of pneumatic valves and will not be described in detail. In this embodiment, the grating disk 300 is mounted on the actuator shaft 120. The actuator shaft 120 drives the grating disk 300 and the valve unit 200 to rotate synchronously, facilitating the controller to calculate the interval between the grating disk 300 switching between the first and second states.

[0060] As for the normal interval time range for the valve part 200 to switch between the open state and the closed state, it can be set according to the state switching time of the pneumatic valve under normal conditions, and the details will not be repeated here.

[0061] Example 2

[0062] This embodiment is basically the same as the above-mentioned embodiment 1, except for the number of notches and the installation position of the photoelectric sensor 400 .

[0063] like Figures 8 and 9 As shown, the grating disk 300 is provided with a second notch 302 on the basis of the above-mentioned embodiment 1. The rotation angle of the grating disk 300 when switching between the first state and the second state is 90°. The angle between the center lines of the two first notches 301 is 90°. The second notch 302 is symmetrical with one of the first notches 301 about the center line of the other first notch 301. The two photoelectric sensors 400 are distributed at an angle of 180° on the edge of the grating disk 300.

[0064] like Figure 10 As shown, the initial state of the grating disk 300 is the first state. At this time, the second notch 302 of the grating disk 300 and the first notch 301 at an angle of 180° to the second notch 302 are respectively located in the sensing area of ​​one of the photoelectric sensors 400, and the valve part 200 is in the open state; when the controller drives the actuator shaft 120 to drive the grating disk 300 to rotate 90° clockwise in the figure, the second notch 302 and one of the first notches 301 are exposed to the photoelectric sensor 400, and the other first notch 301 rotates from the non-sensing area of ​​one photoelectric sensor 400 to the sensing area of ​​the other photoelectric sensor 400, as shown in FIG. Figure 11 As shown, at this time, the grating disc 300 switches from the first state to the second state, and correspondingly, the valve portion 200 is in the closed state; when the controller drives the actuator shaft 120 to drive the grating disc 300 along Figure 11 When the grating disk 300 is rotated 90° counterclockwise, it returns to its initial state, i.e., the first state. The controller determines whether the valve unit 200 is abnormal based on whether the interval time for the grating disk 300 to switch from the first state to the second state or from the second state to the first state exceeds the normal interval time range, and issues a warning signal to remind the staff to inspect and maintain the pneumatic valve.

[0065] Furthermore, the grating disk 300 is circular, and the first notch 301 and the second notch 302 are respectively located at the edges of the grating disk 300 .

[0066] In this embodiment, the first notch 301 and the second notch 302 are respectively arranged on the edge of the grating disk 300, and the photoelectric sensor 400 is installed on the actuator body 110 adjacent to the outer periphery of the grating disk 300. After installation, by controlling the rotation of the grating disk 300, the first notch 301 and the second notch 302 can be selectively located in the sensing area of ​​the photoelectric sensor 400, which facilitates the opening of the first notch 301 and the second notch 302 and the installation of the photoelectric sensor 400.

[0067] Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments, but can be manufactured in various forms, and those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical spirit or basic features of the present invention. Therefore, it should be understood that the above embodiments are illustrative and not restrictive in all aspects.

Claims

1. A pneumatic valve abnormality monitoring device, characterized in that: include: An actuator and a valve portion, wherein the actuator comprises an actuator body and an actuator shaft mounted on the actuator body, wherein the actuator shaft and the valve portion are synchronously driven and connected to the actuator body; A grating disk and two photoelectric sensors, wherein the grating disk is fixedly connected to the actuator shaft, and the two photoelectric sensors are spaced apart and disposed on the actuator body adjacent to the grating disk. The photoelectric sensors have a transmitter and a receiver spaced apart, and a sensing area is formed between the transmitter and the receiver. The grating disk is provided with two first notches along its thickness direction. a controller, the controller being connected to the actuator and the photoelectric sensor respectively; The actuator shaft can drive the grating disk to rotate to a first state or a second state. When the grating disk is in the first state, each of the two first notches is located in the sensing area of ​​one of the photoelectric sensors, and the valve part is in one of the open state and the closed state; when the grating disk is in the second state, one of the first notches is located in the sensing area of ​​one of the photoelectric sensors, and the other first notch is located in the non-sensing area of ​​the other photoelectric sensor, and the valve part is in the other of the open state and the closed state.

2. The pneumatic valve abnormality monitoring device according to claim 1, characterized in that: The rotation angle of the grating disk when switching between the first state and the second state is 90°, the included angle between the center lines of the two first notches is 90°, and the two photoelectric sensors are distributed at a 90° angle on the edge of the grating disk.

3. The pneumatic valve abnormality monitoring device according to claim 1, characterized in that: The grating disk is circular, and the first notch is located at the edge of the grating disk.

4. The pneumatic valve abnormality monitoring device according to claim 1, characterized in that: The grating disk is also provided with a second notch. The rotation angle of the grating disk when switching between the first state and the second state is 90°. The angle between the center lines of the two first notches is 90°. The second notch is symmetrical with one of the first notches about the center line of the other first notch. The two photoelectric sensors are distributed at an angle of 180° on the edge of the grating disk.

5. The pneumatic valve abnormality monitoring device according to claim 4, characterized in that: The grating disk is circular, and the first notch and the second notch are respectively located at the edge of the grating disk.

6. The pneumatic valve abnormality monitoring device according to claim 1, characterized in that: A slot is provided on one side of the actuator shaft facing the grating disk, and a latching protrusion is provided on one side of the grating disk facing the slot. The latching protrusion is engaged with the slot to limit the rotation of the grating disk relative to the actuator shaft.

7. The pneumatic valve abnormality monitoring device according to claim 1, characterized in that: A clamping protrusion is provided on the side of the actuator shaft facing the grating disk, and a clamping groove is provided on the side of the grating disk facing the actuator shaft. The clamping protrusion is clamped with the clamping groove to limit the rotation of the grating disk relative to the actuator shaft.

8. The pneumatic valve abnormality monitoring device according to claim 6 or 7, characterized in that: The clamping protrusion is spaced apart from the photoelectric sensor.

9. The pneumatic valve abnormality monitoring device according to claim 6 or 7, characterized in that: The grating disk is fixedly connected to the actuator shaft via screws.

10. The pneumatic valve abnormality monitoring device according to any one of claims 1 to 7, characterized in that: It also includes a mounting seat, which corresponds to the photoelectric sensor in a one-to-one manner, and the photoelectric sensor is fixed on the actuator body through the mounting seat.

Images