Mechanical valve opening measuring device

Abstract

The utility model discloses a mechanical valve opening measuring device, which belongs to the technical field of valves, and is characterized in that a connecting shaft on a valve main body transmits a rotation angle signal of a valve core to a rotary encoder, the rotary encoder converts the rotation angle signal into a pulse signal and transmits the pulse signal to a pulse modulator, and the pulse modulator is connected with the valve main body. The pulse modulator modulates the pulse signal, the modulated pulse signal is input into the signal processing module to be processed, then a valve opening signal is output, and the signal processing module transmits the valve opening signal to the display driving module. The opening degree of a traditional valve is digitalized and can be remotely monitored, and the situation that the valve is not opened and closed in place due to human factors is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more specifically, particularly to a mechanical valve opening measurement device. Background Art

[0002] During the processes of moisture regain, feeding, and drying expansion of tobacco leaves and cut tobacco in the cigarette factory's silk-making workshop, steam is involved. Various valves are commonly used for steam control, such as pneumatic diaphragm valves, ball valves, butterfly valves, etc. The pneumatic diaphragm valve can achieve on-line monitoring and remote control of the steam valve opening. However, due to factors such as installation location and installation conditions, various ball valves and butterfly valves that can only be manually switched are still widely used in the pipeline systems of the silk-making workshop, such as the main steam valves and condensate discharge valves of various equipment. Currently, in the equipment operation process, it is required that operators switch the main steam valve and condensate discharge valve according to regulations. However, due to human factors and the fact that the opening of traditional ball valves cannot be judged from the appearance, energy waste is caused by the valves not being closed in time. At the same time, the workshop uniformly uses a condensate discharge system. If any condensate discharge valve is not technically closed, the system back pressure will be too high, resulting in the condensate water of the remaining equipment not being discharged, and then having an irreversible impact on the product process quality. Therefore, digitizing the opening of traditional ball valves is of great significance.

[0003] Currently, a large number of traditional ball valves exist in the steam equipment control cabinets in the silk-making workshop. Operators, maintenance personnel, etc. can only determine their opening and closing conditions by hand, which is greatly affected by human factors. At the same time, when the ball valve is fully open, due to thermal expansion and contraction, the valve core may be stuck, and there is a possibility that the operator may misjudge that the ball valve is in the closed state.

[0004] In summary, the valve control in the prior art has the following disadvantages: Limiting the opening and closing of valves by operators through equipment operation procedures requires a relatively high comprehensive quality of operators; operators only determine the opening and closing conditions of valves by hand, and there are situations where the opening and closing are not in place or misjudgment occurs. Content of the Utility Model

[0005] An object of the utility model is to provide a mechanical valve opening measurement device to solve the problems that operators only determine the opening and closing conditions of valves by hand, resulting in situations where the opening and closing are not in place or misjudgment occurs, and limiting the opening and closing of valves by operators through equipment operation procedures, which requires a relatively high comprehensive quality of operators, etc.

[0006] According to the utility model, a mechanical valve opening measurement device is provided, which includes a rotary encoder, a pulse modulator, a signal processing module, and a display driving module; wherein, the input end of the rotary encoder is connected to the connecting shaft on the valve body, and the output end of the rotary encoder is sequentially connected to the pulse modulator, the signal processing module, and the display driving module.

[0007] Optionally, the mechanical valve opening measurement device further includes a display, which is connected to the display driving module. Under the drive of the display driving module, the display performs local visual display of the valve opening.

[0008] Optionally, the mechanical valve opening measurement device further includes a data communication module, which is connected to the signal processing module and is used to transmit the signal processed by the signal processing module to the cloud.

[0009] Optionally, the mechanical valve opening measurement device further includes a voltage module, which is electrically connected to the signal processing module, the display driving module and the display, and is used to provide working voltage for the signal processing module, the display driving module and the display.

[0010] Optionally, the rotary encoder adopts an absolute rotary encoder. Multiple light channel graduation lines are arranged on the optical code disk of the absolute rotary encoder. By driving the rotation of the rotating shaft through rotating the handwheel, the rotation angle of the absolute rotary encoder is obtained according to the bright and dark information of each graduation line.

[0011] Optionally, each graduation line is arranged with different binary digits. Specifically, the first graduation line is arranged with 2 lines, the second graduation line is arranged with 4 lines, and so on until the Nth graduation line is arranged with 2^N lines, where N is a positive integer.

[0012] Optionally, the rotary encoder adopts an incremental rotary encoder. The incremental rotary encoder includes a rotating shaft, a light emitting diode, a prism, a grating plate, a fixed grating and a photosensitive tube; the rotating shaft passes through the center of the incremental rotary encoder, one end is connected to the connecting shaft on the valve body, and the other end is fixed on the housing of the incremental rotary encoder through a bearing; the light emitting diode is fixed on the stationary part of the incremental rotary encoder, and its light directly irradiates on the prism and then passes through the prism to irradiate on the grating plate; the grating plate is fixedly installed on the rotating shaft and rotates together with the rotating shaft; the fixed grating is opposite to the grating plate but does not rotate with the grating plate; the photosensitive tube is located behind the light transmitting and non-light transmitting areas of the fixed grating, and the photosensitive tube converts the change in light intensity of the received light into an electrical signal.

[0013] The mechanical valve opening measurement device according to the present disclosure has the following technical effects:

[0014] By converting the physical quantity signal of the rotation angle transmitted by the connecting shaft into a series of electrical pulse signals through the rotary encoder, the measurement of the valve opening can be processed and transmitted electronically, improving the digital level and measurement accuracy of the system;

[0015] The noise caused by equipment vibration etc. is filtered through a pulse modulator, ensuring the stability of the signal;

[0016] The local visual display of the valve opening is realized through the display driving module and the display, facilitating the operator to directly observe and control the operation state of the valve;

[0017] The data communication module transmits the signal processed by the signal processing module to the cloud server by wired or wireless means, enabling the remote collection and monitoring of the valve opening data, providing the possibility for data analysis and fault warning, and improving the intelligent level and operation and maintenance efficiency of the system.

[0018] Through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings incorporated in and constituting a part of this specification illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0020] Figure 1 It is a schematic logic connection diagram of the mechanical valve opening measuring device provided by the embodiment of the present invention;

[0021] Figure 2 It is a working principle diagram of the absolute rotary encoder of the mechanical valve opening measuring device provided by the embodiment of the present invention;

[0022] Figure 3 It is a working principle diagram of the incremental rotary encoder of the mechanical valve opening measuring device provided by the embodiment of the present invention;

[0023] Figure 4 It is a schematic flow diagram of the mechanical valve opening measuring method provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present invention.

[0025] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way limits the present invention, its application or use.

[0026] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and devices should be regarded as part of the specification.

[0027] In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0028] Currently, traditional ball valves are widely used in the steam equipment control cabinets of the silk reeling workshop. Only operators, maintenance personnel, etc. can determine their opening and closing status by hand, which is greatly affected by human factors. At the same time, when the ball valve is fully open, due to thermal expansion and contraction, the valve core may be stuck, and there is a possibility that the operator may mistake the ball valve for being in the closed state. This application digitizes the opening of the traditional ball valve using a valve opening detection device, enabling the operator to more intuitively observe the valve opening status and providing a reference for their subsequent operations.

[0029] An embodiment of a mechanical valve opening measurement device is proposed in the present utility model. Specifically, as Figure 1 shown, it includes a rotary encoder, a pulse modulator, a signal processing module, and a display driving module. Among them, the input end of the rotary encoder is connected to the connecting shaft on the valve body, and the output end of the rotary encoder is sequentially connected to the pulse modulator, the signal processing module, and the display driving module. Among them:

[0030] The connecting shaft on the valve body transmits the rotation angle signal of the valve core to the rotary encoder. The rotary encoder converts the rotation angle signal into a pulse signal and transmits the pulse signal to the pulse modulator. The pulse modulator modulates the pulse signal to meet the input specifications of the signal processing module. After the modulated pulse signal is input to the signal processing module for processing, a valve opening signal is output. The signal processing module transmits the valve opening signal to the display driving module. Among them, the processing of the modulated pulse signal by the signal processing module includes but is not limited to filtering, amplification, digital conversion, etc., to extract the accurate information of the valve opening.

[0031] In the embodiment of the present utility model, the mechanical valve opening measurement device further includes a display, and the display is connected to the display driving module. Under the drive of the display driving module, the display performs local visualization display of the valve opening.

[0032] Furthermore, the pulse modulator includes a signal shaping circuit and a frequency adjustment circuit to ensure that the output pulse signal meets the input requirements of the signal processing module.

[0033] In the embodiment of the present utility model, the mechanical valve opening measurement device further includes a data communication module, and the data communication module is connected to the signal processing module for transmitting the signal processed by the signal processing module to the cloud. Among them, the data communication module supports wireless or wired communication methods, including but not limited to Wi-Fi, Bluetooth, Ethernet, etc., to facilitate data exchange with the cloud server or other remote devices.

[0034] In the embodiment of the present utility model, the mechanical valve opening measurement device further includes a voltage module, which is electrically connected to the signal processing module, the display driving module and the display, and is used to provide a stable working voltage for the signal processing module, the display driving module and the display, so as to ensure the normal operation of each module.

[0035] In the embodiment of the present utility model, an absolute rotary encoder is adopted. Specifically, as Figure 2 shown, the absolute rotary encoder includes a handwheel, an optical code disk, a gear, an optical hole, an optical sensor and a data processing circuit. When the handwheel drives the rotation shaft of the encoder to rotate, the optical code disk also rotates accordingly. The pattern on the optical code disk moves as it rotates, causing the light rays passing through the optical hole and shining on the optical sensor to change. The optical sensor converts these light ray changes into electrical signals and transmits them to the data processing circuit. The data processing circuit receives the electrical signals from the optical sensor and decodes them according to the pattern on the optical code disk. Since the pattern on the optical code disk is pre-designed and each position corresponds to a unique encoded value, the data processing circuit can accurately identify the current rotation position.

[0036] In the embodiment of the present utility model, multiple light channel engraved lines are provided on the optical code disk of the absolute rotary encoder. By rotating the handwheel to drive the rotation shaft to rotate, the rotation angle of the absolute rotary encoder is obtained according to the bright and dark information of each engraved line. Specifically, each engraved line is arranged with different binary digits. Specifically, the first engraved line is arranged with 2 lines, the second engraved line is arranged with 4 lines, the third engraved line is arranged with 8 lines, the fourth engraved line is arranged with 16 lines, and so on, until the Nth engraved line is arranged with 2^N lines, where N is a positive integer. It should be noted that after rotating the handwheel to drive the rotation shaft to rotate, the rotation angle of the rotary encoder can be obtained by reading the bright and dark information of each engraved line, and this information is only determined by the mechanical position and is not affected by power outage factors. Since the handwheel needs to rotate multiple circles, the multi-turn absolute value encoder is used in the embodiment of the present utility model, and the gear transmission is used to drive multiple groups of optical code disks to rotate, so that each position code is unique.

[0037] In the embodiment of the present utility model, as Figure 3As shown in the figure, an incremental rotary encoder is adopted. The incremental rotary encoder includes a rotary shaft, a light-emitting diode, a prism, a grating plate, a fixed grating, and a photosensitive tube. The rotary shaft passes through the center of the incremental rotary encoder. One end is connected to the connecting shaft on the valve body, and the other end is fixed to the housing of the incremental rotary encoder through a bearing to ensure the smoothness of rotation. The light-emitting diode is fixed on the stationary part of the incremental rotary encoder, and its light directly irradiates the prism and then passes through the prism to irradiate the grating plate. The grating plate is fixedly installed on the rotary shaft and rotates together with the rotary shaft. The fixed grating is opposite to the grating plate but does not rotate with the grating plate. The photosensitive tube is located behind the light-transmitting and light-blocking areas of the fixed grating, and the photosensitive tube converts the change in the light intensity of the received light into an electrical signal. Among them, the grating plate is firmly installed on the rotary shaft and rotates together with the rotary shaft. When the rotary shaft rotates, the grating plate also rotates accordingly, changing the order of the light-transmitting and light-blocking areas on it. The fixed grating is used to interact with the rotating grating plate to generate a more complex bright-dark change pattern.

[0038] The present utility model also provides an embodiment of a method for measuring the opening degree of a mechanical valve, specifically as Figure 4 shown, which includes the following steps:

[0039] Signal acquisition step: The rotation angle signal of the valve core is transmitted to the rotary encoder in real time through the connecting shaft on the valve body; the rotation angle signal of the valve core is directly transmitted to the rotary encoder in real time through the connecting shaft on the valve body, and this method ensures the real-time nature of the measurement.

[0040] Signal conversion step: The rotary encoder receives the rotation angle signal from the connecting shaft and converts it into a pulse signal;

[0041] Signal modulation step: The pulse signal obtained in the signal conversion step is sent to a pulse modulator for modulation processing; this helps to enhance the stability and anti-interference ability of the signal and ensures the integrity and accuracy of the signal during transmission.

[0042] Signal processing step: The signal processing module receives the signal modulated by the pulse modulator, performs signal processing, and generates a valve opening degree signal; this ensures the accuracy and readability of the output signal and also provides a basis for realizing the intelligent monitoring and control of the valve opening degree. The valve can be remotely monitored and automatically adjusted as needed.

[0043] Local display step: The valve opening degree signal generated in the signal processing step is sent to the display driving module, and the display driving module drives the display to display the current opening degree information of the valve. This enables the operator to immediately understand the opening degree state of the valve, facilitating manual adjustment or making corresponding operation decisions based on the displayed information.

[0044] In the embodiment of the present utility model, the mechanical valve opening measurement method further includes:

[0045] Remote transmission step: The signal processed in the signal processing step is also transmitted to the cloud server by wire or wirelessly through the data communication module, realizing remote data acquisition and monitoring.

[0046] In the embodiment of the present utility model, in the signal conversion step, an incremental rotary encoder is adopted. The rotary shaft of the incremental rotary encoder outputs a zero-position pulse Z signal every time it rotates one circle. The number of rotations is recorded by using the number of zero-position pulse Z signals. The electric signals output by the photosensitive tubes of the incremental rotary encoder are two signals with a phase difference of 90°, namely, phase A and phase B. By detecting the phase difference and frequency of these two signals of phase A and phase B, the rotation direction and angular velocity of the rotary shaft can be calculated. If the phase A signal leads the phase B signal, it indicates forward rotation; conversely, if the phase B signal leads the phase A signal, it indicates reverse rotation. Every time a certain angle is rotated, the encoder outputs a pulse. By calculating the number of pulses, the total rotation angle or displacement can be known.

[0047] During operation, the incremental rotary encoder has corresponding phase outputs. The rotation direction is discriminated and the number of pulses is increased or decreased through a pulse modulator and a signal processing module. The starting point of the incremental rotary encoder can be set arbitrarily. When using, turn the handwheel to the tightest position, that is, when the valve opening is zero, press the zero adjustment or reset button to reset the starting point, and multi-turn accumulation and measurement can be realized. A zero-position pulse Z signal is output every time it rotates one circle, and this zero-position pulse Z signal can be used to record the number of rotations. At the same time, with the pulses fixed, the original pulses are frequency-doubled by using the A and B signals with a phase difference of 90° to improve the resolution.

[0048] Specifically, the A-phase and B-phase signal pulses output by the incremental rotary encoder are represented by the piecewise periodic function x(t) as:

[0049] , where A is the square wave amplitude and T is the period.

[0050] The mechanical valve opening detection device and method of the present utility model digitize the rotation angle of the valve core by using a rotary encoder, and then convert it into the valve opening, digitize the traditional valve opening and enable remote monitoring, avoiding the situation that the valve is not fully opened or closed caused by human factors.

[0051] The structure, features and effects of the present utility model have been described in detail based on the embodiments shown in the drawings above. However, the above are only the preferred embodiments of the present utility model. It should be noted that for the technical features involved in the above embodiments and their preferred modes, those skilled in the art can reasonably combine and match them into a variety of equivalent solutions without departing from or changing the design concept and technical effects of the present utility model. Therefore, the scope of implementation of the present utility model is not limited by the drawings shown. Any changes made in accordance with the concept of the present utility model, or modified into equivalent embodiments of equivalent changes, should still be within the protection scope of the present utility model as long as they do not exceed the spirit covered by the specification and the drawings.

Claims

1. A mechanical valve opening measuring device, characterized in that: It includes a rotary encoder, a pulse modulator, a signal processing module and a display driving module; wherein the input end of the rotary encoder is connected to the connecting shaft on the valve body, and the output end of the rotary encoder is connected to the pulse modulator, the signal processing module and the display driving module in sequence.

2. The mechanical valve opening measuring device according to claim 1, characterized in that: It also includes a display, which is connected to the display driving module. Under the drive of the display driving module, the display performs local visual display of the valve opening.

3. The mechanical valve opening measuring device according to claim 1, characterized in that: It also includes a data communication module, which is connected to the signal processing module and is used to transmit the signal processed by the signal processing module to the cloud.

4. The mechanical valve opening measuring device according to claim 2, characterized in that: It also includes a voltage module, which is electrically connected to the signal processing module, the display driving module and the display, and is used to provide working voltage for the signal processing module, the display driving module and the display.

5. The mechanical valve opening measuring device according to claim 1, characterized in that: The rotary encoder adopts an absolute rotary encoder. A plurality of optical channel engraved lines are arranged on the optical code disk of the absolute rotary encoder. The rotating shaft is rotated by rotating the hand wheel, and the rotation angle of the absolute rotary encoder is obtained according to the light and dark information of each engraved line.

6. The mechanical valve opening measuring device according to claim 5, characterized in that: Each line is arranged with different binary digits, specifically, the first line is arranged with 2 lines, the second line is arranged with 4 lines, and so on, until the Nth line is arranged with 2^N lines, where N is a positive integer.

7. The mechanical valve opening measuring device according to claim 1, characterized in that: The rotary encoder adopts an incremental rotary encoder, which includes a rotating shaft, a light-emitting diode, a prism, a grating plate, a fixed grating and a photosensitive tube; the rotating shaft passes through the center of the incremental rotary encoder, one end of which is connected to the connecting shaft on the valve body, and the other end is fixed to the housing of the incremental rotary encoder through a bearing; the light-emitting diode is fixed to the stationary part of the incremental rotary encoder, and its light directly irradiates the prism and irradiates the grating plate through the prism; the grating plate is fixedly mounted on the rotating shaft and rotates with the rotating shaft; the fixed grating is opposite to the grating plate, but does not rotate with the grating plate; the photosensitive tube is located behind the light-transmitting and light-impermeable areas of the fixed grating, and the photosensitive tube converts the light intensity change of the received light into an electrical signal.

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