Photoelectric flow meter
By setting a gap between the light guide block and the inner wall of the flow guide tube, the problem of poor detection effect of traditional photoelectric flow meters is solved, and higher measurement accuracy and increased flow rate are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN NENGDIAN TECH
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-03
AI Technical Summary
Traditional photoelectric flow meters have poor detection performance, and the light guide block blocks the liquid delivery channel of the guide tube, affecting the flow rate and increasing liquid residue.
A gap is set between the side of the light guide block and the inner wall of the flow guide tube to reduce the cross-sectional area of the light guide block, increase the water flow area, and measure the flow rate and velocity by reflecting the light signal.
To ensure the flow meter's detection effectiveness, reduce liquid residue, increase flow rate, reduce pipe resistance, and improve measurement accuracy.
Smart Images
Figure CN224455875U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flow measurement equipment technology, and in particular to a photoelectric flow meter. Background Technology
[0002] A photoelectric flow meter is a device that uses optical principles to measure the velocity or flow rate of fluids. Its biggest advantage is that it does not rely on traditional mechanical impellers, thus avoiding problems such as impeller wear and jamming. However, traditional photoelectric flow meters suffer from poor detection performance.
[0003] Therefore, it is necessary to provide a new photoelectric flow meter to solve the above-mentioned technical problems. Utility Model Content
[0004] The main purpose of this utility model is to provide a photoelectric flow meter, which aims to solve the technical problem of poor detection effect of photoelectric flow meters.
[0005] To achieve the above objectives, this utility model proposes a photoelectric flow meter, comprising:
[0006] Face shell;
[0007] A flow guide tube is disposed on the face shell, a light guide block is disposed in the flow guide tube, a gap is provided between the side of the light guide block and the inner wall of the flow guide tube, and the light guide block is provided with an optical interface for reflecting and refracting light signals;
[0008] A circuit board is disposed on the faceplate, and the circuit board is provided with an optical signal transmitter and an optical signal receiver at intervals corresponding to the position of the light guide block; the optical signal receiver is used to receive the optical signal emitted by the optical signal transmitter, which enters the light guide block, is reflected by the optical interface, and then exits the light guide block.
[0009] In one embodiment, the light guide block is provided with a first side and a second side, the first side and the second side are disposed opposite to each other, and a gap is provided between the first side and the second side and the inner wall of the guide tube.
[0010] In one embodiment, the light guide block is further provided with a first inclined surface and a second inclined surface, both adjacent to the first side surface. The first inclined surface and the second inclined surface are symmetrically arranged. The optical interface includes the first inclined surface and the second inclined surface. The optical signal receiver is used to receive the optical signal emitted by the optical signal transmitter, which enters the light guide block and is reflected sequentially by the first inclined surface and the second inclined surface before being emitted out of the light guide block.
[0011] In one embodiment, the light guide block is a trapezoidal prism or a triangular prism.
[0012] In one embodiment, the photoelectric flow meter further includes a light shield covering the optical signal transmitter and the optical signal receiver.
[0013] In one embodiment, the light shield is provided with a light shield plate, which is located between the light signal transmitter, the light signal receiver and the light guide block. The light shield plate is provided with light-transmitting holes at positions corresponding to the light signal transmitter and the light signal receiver.
[0014] In one embodiment, the light shield is further provided with a partition located between the optical signal transmitter and the optical signal receiver.
[0015] In one embodiment, the faceplate is provided with a groove, and the circuit board is disposed in the groove.
[0016] In one embodiment, a mounting post is provided in the groove, and the circuit board is riveted to the groove via the mounting post;
[0017] The groove is provided with a seal corresponding to the part of the circuit board that is away from the guide tube.
[0018] In one embodiment, the flow guide tube, the light guide block, and the surface shell are integrally formed.
[0019] The technical solution of this utility model reduces the cross-sectional area of the light guide block and minimizes liquid residue by creating a gap between the side of the light guide block and the inner wall of the flow guide tube, thus ensuring the detection effect of the flow meter. Simultaneously, it increases the water-passing area at the location where the light guide block is installed in the flow guide tube, thereby increasing the flow rate and reducing pipe resistance. In this embodiment, the flow guide tube is used to transport liquid. The light guide block is disposed inside the flow guide tube and can cooperate with a light signal transmitter and a light signal receiver to measure the flow rate and velocity of the liquid in the flow guide tube. Specifically, the light signal transmitter emits a light signal, and the light signal receiver receives the light signal. During measurement, the light signal emitted by the light signal transmitter first enters the light guide block, is then reflected by the optical interface of the light guide block, and finally exits the light guide block to be received by the light signal receiver. By obtaining the light intensity received by the light signal receiver, the flow rate and velocity of the liquid in the flow guide tube can be calculated. By creating a gap between the side of the light guide block and the inner wall of the flow guide tube, the cross-sectional area of the light guide block can be reduced, thereby reducing liquid residue on the light guide block and ensuring the detection effect of the flow meter. Simultaneously, the gap increases the water flow area at the point where the light guide block is installed in the flow guide tube, thus increasing the flow rate and reducing pipe resistance. This photoelectric flow meter is applied in technical fields such as flow measurement equipment. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0021] Figure 1 A schematic diagram of the structure of a photoelectric flowmeter in one embodiment of the present invention;
[0022] Figure 2 for Figure 1 Cross-sectional view;
[0023] Figure 3 for Figure 1 Another cross-sectional view;
[0024] Figure 4 A schematic diagram of the structure of the light shield in one embodiment of this utility model.
[0025] Explanation of icon numbers:
[0026] 100, front shell; 110, groove; 120, mounting post; 200, guide tube; 210, light guide block; 211, gap; 212, optical interface; 213, first side surface; 214, second side surface; 215, first inclined surface; 216, second inclined surface; 300, circuit board; 310, optical signal transmitter; 320, optical signal receiver; 400, light shield; 410, light shield plate; 411, light-transmitting hole; 420, partition plate.
[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously.
[0031] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0032] A photoelectric flow meter is a device that uses optical principles to measure the velocity or flow rate of fluids. Its biggest advantage is that it does not rely on traditional mechanical impellers, thus avoiding problems such as impeller wear and jamming. During actual research and design, researchers found that photoelectric flow meters typically require a light guide block inside the flow guide tube. However, in traditional photoelectric flow meters, the light guide block often completely blocks part of the liquid delivery channel in the flow guide tube. This not only affects the liquid flow rate but also increases the amount of liquid remaining on the light guide block, thus impacting the detection effect.
[0033] This utility model proposes a photoelectric flow meter, aiming to solve the technical problem of poor detection effect of photoelectric flow meters.
[0034] Please see Figures 1 to 4 In one embodiment of this utility model, the photoelectric flow meter includes a housing 100, a flow guide tube 200, and a circuit board 300. The flow guide tube 200 is disposed on the housing 100, and a light guide block 210 is disposed in the flow guide tube 200. A gap 211 is provided between the side of the light guide block 210 and the inner wall of the flow guide tube 200. The light guide block 210 is provided with an optical interface 212 for reflecting and refracting light signals. The circuit board 300 is disposed on the housing 100, and a light signal transmitter 310 and a light signal receiver 320 are disposed at intervals corresponding to the positions of the light guide block 210. The light signal receiver 320 is used to receive the light signal emitted by the light signal transmitter 310, which enters the light guide block 210, is reflected by the optical interface 212, and then exits the light guide block 210.
[0035] The technical solution of this utility model reduces the cross-sectional area of the light guide block 210 and the liquid residue by setting a gap 211 between the side of the light guide block 210 and the inner wall of the flow guide tube 200, thereby ensuring the detection effect of the flow meter. Simultaneously, it increases the water passage area at the location where the light guide block 210 is installed in the flow guide tube 200, thereby increasing the flow rate and reducing the tube resistance. In this embodiment, the flow guide tube 200 is used to transport liquid. The light guide block 210 is disposed inside the flow guide tube 200 and can cooperate with the optical signal transmitter 310 and the optical signal receiver 320 to measure the flow rate and velocity of the liquid in the flow guide tube 200. Specifically, the optical signal transmitter 310 is used to emit optical signals, and the optical signal receiver 320 is used to receive optical signals. During measurement, the optical signal emitted by the optical signal transmitter 310 first enters the light guide block 210, is then reflected by the optical interface 212 of the light guide block 210, and finally exits the light guide block 210 to be received by the optical signal receiver 320. By obtaining the light intensity received by the optical signal receiver 320, the flow rate and velocity of the liquid in the guide tube 200 can be calculated. By setting a gap 211 between the side of the light guide block 210 and the inner wall of the guide tube 200, the cross-sectional area of the light guide block 210 can be reduced, thereby reducing liquid residue on the light guide block 210 and ensuring the detection effect of the flow meter. At the same time, due to the setting of the gap 211, the water passage area at the location where the light guide block 210 is installed in the guide tube 200 is increased, thereby increasing the flow rate and reducing the pipe resistance. This photoelectric flow meter is applied in the technical field of flow measurement equipment.
[0036] It should be noted that the cross-sectional area of the light guide block 210 mentioned above refers to the area of the cross-section made radially through the guide tube 200, i.e. Figure 3 The area of the light guide block 210 in the light source. In a specific embodiment, the light signal transmitter 310 may be a diode, and the light signal receiver 320 may be a light signal detector.
[0037] In one embodiment of this utility model, the light guide block 210 is provided with a first side surface 213 and a second side surface 214, which are arranged opposite to each other. A gap 211 is provided between both the first side surface 213 and the second side surface 214 and the inner wall of the flow guide tube 200. In this embodiment, by providing gaps 211 between both the first side surface 213 and the second side surface 214 of the light guide block 210 and the inner wall of the flow guide tube 200, the cross-sectional area of the light guide block 210 can be reduced, thereby reducing liquid residue on the light guide block 210 and ensuring the detection effect of the flow meter. Simultaneously, it also increases the water passage area at the location where the light guide block 210 is installed in the flow guide tube 200, thereby increasing the flow rate and reducing pipe resistance.
[0038] In one embodiment of this utility model, the light guide block 210 is further provided with a first inclined surface 215 and a second inclined surface 216, both adjacent to the first side surface 213. The first inclined surface 215 and the second inclined surface 216 are symmetrically arranged, and the optical interface 212 includes the first inclined surface 215 and the second inclined surface 216. The optical signal receiver 320 is used to receive the optical signal emitted by the optical signal transmitter 310, which enters the light guide block 210 and is reflected sequentially by the first inclined surface 215 and the second inclined surface 216 before exiting the light guide block 210. Specifically, during measurement, the optical signal emitted by the optical signal transmitter 310 first enters the light guide block 210, is then reflected by the first inclined surface 215 to the second inclined surface 216, is reflected again by the second inclined surface 216, and finally exits the light guide block 210 to be received by the optical signal receiver 320. In a specific embodiment, the light guide block 210 is a trapezoidal prism or a triangular prism.
[0039] In one embodiment of this utility model, the photoelectric flow meter further includes a light shield 400, which covers the light signal transmitter 310 and the light signal receiver 320. In this embodiment, the light shield 400 is used to block external light to prevent external light from shining on the light signal receiver 320, ensuring that the light signal receiver 320 only receives the light signal emitted by the light signal transmitter 310, thereby ensuring the detection effect of the photoelectric flow meter.
[0040] In one embodiment of this utility model, the light shield 400 is provided with a light shield 410, which is located between the light signal transmitter 310, the light signal receiver 320, and the light guide block 210. The light shield 410 has light-transmitting holes 411 at positions corresponding to the light signal transmitter 310 and the light signal receiver 320. In this embodiment, the light shield 410 can eliminate light interference to a certain extent, ensuring the detection effect of the photoelectric flow meter.
[0041] In one embodiment of this utility model, the light shield 400 is further provided with a partition 420 located between the light signal transmitter 310 and the light signal receiver 320. In this embodiment, the partition 420 is used to separate the light signal transmitter 310 and the light signal receiver 320 to prevent the light signal receiver 320 from directly receiving the light signal emitted by the light signal transmitter 310, thereby ensuring the detection effect of the photoelectric flowmeter.
[0042] In one embodiment of this utility model, the faceplate 100 is provided with a groove 110, and the circuit board 300 is disposed in the groove 110. In this embodiment, by disposing of the circuit board 300 in the groove 110, the circuit board 300 can be better protected and the risk of damage to the circuit board 300 can be reduced.
[0043] In one embodiment of this utility model, a mounting post 120 is provided in the groove 110, and the circuit board 300 is riveted to the groove 110 via the mounting post 120. In this embodiment, the circuit board 300 is installed in the groove 110 by riveting, which reduces the installation difficulty of the circuit board 300. Simultaneously, a sealing element is provided in the portion of the groove 110 corresponding to the circuit board 300 facing away from the guide pipe 200, which can isolate the circuit board 300 from the external environment to ensure the normal operation of the circuit board 300. In a specific embodiment, the sealing element can be a sealant.
[0044] In one embodiment of this utility model, the flow guide tube 200, the light guide block 210, and the face shell 100 are integrally formed. In this embodiment, the flow guide tube 200, the light guide block 210, and the face shell 100 are manufactured by integral forming, which can improve the structural strength of the photoelectric flow meter and reduce the manufacturing difficulty of the photoelectric flow meter.
[0045] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.
Claims
1. An optical flowmeter characterized by, include: Face shell; A flow guide tube is disposed on the face shell, a light guide block is disposed in the flow guide tube, a gap is provided between the side of the light guide block and the inner wall of the flow guide tube, and the light guide block is provided with an optical interface for reflecting and refracting light signals; A circuit board is disposed on the faceplate, and the circuit board is provided with an optical signal transmitter and an optical signal receiver at intervals corresponding to the position of the light guide block; the optical signal receiver is used to receive the optical signal emitted by the optical signal transmitter, which enters the light guide block, is reflected by the optical interface, and then exits the light guide block.
2. The optical flow meter of claim 1, wherein, The light guide block has a first side and a second side, the first side and the second side are arranged opposite to each other, and a gap is provided between the first side and the second side and the inner wall of the guide tube.
3. The optical flow meter of claim 2, wherein, The light guide block is further provided with a first inclined surface and a second inclined surface, both adjacent to the first side surface. The first inclined surface and the second inclined surface are symmetrically arranged. The optical interface includes the first inclined surface and the second inclined surface. The optical signal receiver is used to receive the optical signal emitted by the optical signal transmitter, which enters the light guide block and is reflected sequentially by the first inclined surface and the second inclined surface before being emitted out of the light guide block.
4. The optical flow meter of claim 3, wherein, The light guide block is a trapezoidal or triangular prism.
5. The optical flow meter of claim 1, wherein, The photoelectric flow meter also includes a light shield, which covers the optical signal transmitter and the optical signal receiver.
6. The optical flow meter of claim 5, wherein, The light shield is provided with a light shield plate, which is located between the light signal transmitter, the light signal receiver and the light guide block. The light shield plate is provided with light-transmitting holes at the positions corresponding to the light signal transmitter and the light signal receiver.
7. The optical flow meter of claim 5, wherein, The light shield is also provided with a partition located between the optical signal transmitter and the optical signal receiver.
8. The optical flow meter of any one of claims 1 to 7, wherein, The faceplate is provided with a groove, and the circuit board is disposed in the groove.
9. The optical flow meter of claim 8, wherein, A mounting post is provided in the groove, and the circuit board is riveted to the groove through the mounting post. The groove is provided with a seal corresponding to the part of the circuit board that is away from the guide tube.
10. The optical flow meter of any one of claims 1 to 7, wherein, The flow guide tube, the light guide block, and the surface shell are integrally formed.