Maintenance-free corrosion-resistant card type ultrasonic flowmeter

Abstract

The utility model provides a maintenance-free corrosion-resistant card type ultrasonic flowmeter which comprises a shell, the shell is in a card shape, a fluid channel is arranged in the center of the shell, a control box is arranged on the top of the shell, and installation limiting holes are formed in the two sides of the shell. An ultrasonic transmitter and an ultrasonic receiver are oppositely arranged on the inner wall of the fluid channel; and a main control chip is arranged in the control box, is connected with the ultrasonic transmitter through a transmitting circuit, and is connected with the ultrasonic receiver through a receiving circuit. Reliability and durability of flow measurement are improved, and remarkable economic benefits are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flow measurement technical field more particularly relates to a kind of maintenance-free corrosion-resistant card type ultrasonic flowmeter. BACKGROUND

[0002] With the continuous progress of industrial production automation level, the accuracy of liquid flow measurement and the durability of equipment become increasingly important. Especially in the chemical, pharmaceutical and other industries, it is often necessary to handle various corrosive media, which requires the flowmeter not only to be accurate, but also to have good corrosion resistance. Although there are many flowmeters on the market to choose from, stability and maintenance-free are still key challenges during long-term use.

[0003] Ultrasonic flowmeters meet industrial needs to some extent due to their non-contact measurement advantages. It calculates the flow by measuring the time difference of ultrasonic wave propagation in fluid, avoiding direct contact with the measured fluid, thereby reducing the risk of wear and corrosion. However, traditional ultrasonic flowmeters still have certain limitations in design, especially in terms of device miniaturization, corrosion resistance and service life.

[0004] Specifically, existing ultrasonic flowmeters are often large in size, making them inconvenient to install in compact industrial environments. At the same time, although their non-contact measurement method reduces direct contact with the fluid, in some extreme corrosive environments, the housing and connecting parts of the flowmeter can still be eroded, affecting the accuracy of measurement and the service life of the equipment. Therefore, developing an ultrasonic flowmeter that is both miniaturized and highly corrosion-resistant is of great significance to improving the efficiency and safety of industrial production. This is also one of the problems to be solved in the current flowmeter technology field. SUMMARY

[0005] To solve the problems in the prior art, the purpose of the utility model is to provide a maintenance-free corrosion-resistant card type ultrasonic flowmeter, which improves the reliability and durability of flow measurement, and has significant economic benefits.

[0006] To achieve the above purpose, the utility model realizes the following technical solutions:

[0007] A maintenance-free corrosion-resistant card type ultrasonic flowmeter, comprising a shell, the shell is card-shaped, a fluid passage is built-in in the center of the shell, a control box is provided at the top of the shell, and mounting limit holes are provided on both sides of the shell; On the inner wall of the fluid passage, ultrasonic transmitters and ultrasonic receivers are provided opposite each other; A main control chip is provided in the control box, the main control chip is connected with the ultrasonic transmitter through a sending circuit, and the main control chip is connected with the ultrasonic receiver through a receiving circuit.

[0008] Further, the control box is also provided with a display screen, a working indicator light and a touch control panel, and the main control chip is connected with the display screen, the working indicator light and the touch control panel respectively.

[0009] Further, the control box is also provided with a power supply circuit, and the power supply circuit is connected with the sending circuit and the receiving circuit respectively.

[0010] Further, the sending circuit comprises that one pin of the transformer U14 is connected with one pin of the connector U8, seven pins of the transformer U14 are connected with two pins of the connector U8, and the connector U8 is connected with the ultrasonic wave transmitter; three pins and four pins of the transformer U14 are connected with the main control chip respectively, five pins of the transformer U14 are connected with one end of the capacitor C45, one end of the resistance R40 and one end of the resistance R39 respectively; the other end of the resistance R39 is connected with one end of the resistance R38, one end of the diode D9, one end of the capacitor C41, one end of the capacitor C42, one end of the capacitor C43 and one end of the capacitor C45 respectively, and the other end of the resistance R38 is connected with the power supply circuit; the other end of the diode D9, the other end of the capacitor C41, the other end of the capacitor C42, the other end of the capacitor C43, the other end of the capacitor C45 and the other end of the resistance R40 are grounded respectively.

[0011] Further, the receiving circuit comprises that the base of the triode Q3 is connected with one end of the resistance R43, one end of the resistance R44, one end of the capacitor C46, four pins of the switch diode D10 and one pin of the switch diode D10 respectively, the emitter of the triode Q3 is connected with one end of the resistance R46 and one end of the capacitor C47 respectively, and the collector of the triode Q3 is connected with one end of the resistance R48, one end of the capacitor C50, two pins of the adjustable inductor U9, one pin of the connector U15 and the main control chip respectively; two pins of the switch diode D10 are connected with the power supply circuit, and three pins of the switch diode D10 are grounded; two pins of the connector U7 are connected with the other end of the capacitor C46, and one pin of the connector U7 is grounded, and the connector U7 is connected with the ultrasonic wave receiver; the other end of the resistance R43 is connected with the power supply circuit, the other end of the resistance R48, the other end of the capacitor C50 and one pin of the adjustable inductor U9 respectively; the other end of the capacitor C47 is connected with one end of the resistance R47, and the other end of the resistance R44, the other end of the resistance R46 and the other end of the resistance R47 are grounded respectively.

[0012] Further, the power supply circuit comprises: one pin of the power conversion chip U3 is connected with one end of the capacitor C5, two pins of the power conversion chip U3 are grounded, three pins of the power conversion chip U3 are connected with one end of the resistor R36 and one end of the resistor R37 respectively, four pins of the power conversion chip U3 are connected with one end of the resistor R35, five pins of the power conversion chip U3 are connected with 24V external power supply, the other end of the resistor R35 and one end of the capacitor C6 respectively, six pins of the power conversion chip U3 are connected with the other end of the capacitor C5, one end of the inductor L2 and the cathode of the diode D6 respectively; one end of the capacitor C6 is grounded, the anode of the diode D6 is grounded, the other end of the resistor R37 is grounded; the other end of the inductor L2 is connected with the other end of the resistor R36, one end of the capacitor C44, one end of the capacitor C37, one end of the capacitor C8, one end of the capacitor C39, the other end of the resistor R43, two pins of the switch diode D10 and the other end of the resistor R38 respectively; the other end of the capacitor C44, the other end of the capacitor C37, the other end of the capacitor C8 and the other end of the capacitor C39 are grounded.

[0013] Further, the control box is provided with a dustproof and waterproof cover.

[0014] Further, the inner wall of the fluid channel is provided with a polytetrafluoroethylene corrosion-resistant coating.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1. The utility model discloses a whole design light and thin like card, built-in fluid channel, the inner wall of the channel is specially treated, and a layer of high-performance polytetrafluoroethylene corrosion-resistant coating is coated, so that the utility model does not suffer from corrosion when contacting corrosive liquid and prolongs the service life. The utility model integrates ultrasonic transmitter and ultrasonic receiver in the inner wall of the fluid channel, can send and receive ultrasonic signals in the liquid flowing process, accurately captures the change of fluid flow rate by measuring the time difference of ultrasonic propagation in the forward flow and the reverse flow. The control box of the utility model comprises a display screen, a working indicator lamp and a touch control panel, the high-resolution display screen is used for displaying flow data in real time, the working state indicator lamp is used for feeding back the equipment operation condition, and the touch control panel is convenient for users to set parameters and operate. The shell is externally provided with standardized mounting limiting holes, so that the utility model can be quickly and stably installed in the pipeline system under various working conditions through flanges.

[0017] 2. The utility model adopts high-quality corrosion-resistant materials and surface treatment processes, so that the flowmeter can be applied in a strong corrosive liquid environment for a long time without additional corrosion protection measures, and realizes true maintenance-free.

[0018] 3. The utility model utilizes advanced multi-pulse technology and signal digital processing technology, guarantees that the flowmeter can still maintain high-precision and high-stability flow measurement under complex working conditions.

[0019] 4, The utility model discloses compact structure, and the cost is lower, and operating energy consumption is little, and the comprehensive operation cost has been reduced. Convenient management, easy installation debugging and routine maintenance.

[0020] 5, The utility model discloses not only be applicable to the conventional water body flow monitoring, still can adapt to the continuous flow monitoring demand of various corrosive liquids in petroleum chemical industry, pharmacy, metallurgy and other industries.

[0021] Therefore, compared with the prior art, the utility model has substantial characteristics and progress, and the beneficial effects of the implementation are also obvious. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only the embodiments of the utility model, and those skilled in the art can also obtain other drawings according to the provided drawings without creating creative labor.

[0023] Figure 1 It is the front view of the utility model.

[0024] Figure 2 It is the top view of the utility model.

[0025] Figure 3 It is the electrical block diagram of the utility model.

[0026] Figure 4 It is the circuit principle diagram of the sending circuit of the utility model.

[0027] Figure 5 It is the circuit principle diagram of the receiving circuit of the utility model.

[0028] Figure 6 It is the circuit principle diagram of the power supply circuit of the utility model.

[0029] In the drawings, various reference signs represent:

[0030] 1, shell, 2, fluid passage, 3, polytetrafluoroethylene corrosion-resistant coating, 4, ultrasonic transmitter, 5, ultrasonic receiver, 6, control box, 7, dustproof and waterproof cover, 8, display screen, 9, working indicator light, 10, touch control panel, 11, installation limiting hole, 12, main control chip, 13, sending circuit, 14, receiving circuit, 15, power supply circuit. DETAILED DESCRIPTION

[0031] The specific implementation of the utility model will be described below in combination with the drawings.

[0032] AsFigures 1-2 The maintenance-free corrosion-resistant card type ultrasonic flowmeter shown includes a shell 1, the shell 1 is card-shaped, a fluid passage 2 is arranged in the center of the shell 1, a polytetrafluoroethylene corrosion-resistant coating 3 is arranged on the inner wall of the fluid passage 2, and an ultrasonic transmitter 4 and an ultrasonic receiver 5 are arranged oppositely on the inner wall of the fluid passage 2. A control box 6 is arranged on the top of the shell 1, a dustproof and waterproof cover 7 is arranged on the control box 6, a display screen 8, a working indicator lamp 9 and a touch control panel 10 are arranged in the control box 6. Limiting holes 11 are arranged on the two sides of the shell 1.

[0033] The control box is further provided with a main control chip 12, a sending circuit 13, a receiving circuit 14 and a power supply circuit 15. Figure 3 As shown in the figure, the main control chip 12 is connected with the ultrasonic transmitter 4 through the sending circuit 13, and the main control chip 12 is connected with the ultrasonic receiver 5 through the receiving circuit 14. The main control chip 12 is connected with the display screen 8, the working indicator lamp 9 and the touch control panel 10 respectively. The power supply circuit 15 is connected with the sending circuit 13 and the receiving circuit 14 respectively.

[0034] As shown in the figure, Figure 4 The sending circuit 13 includes:

[0035] One pin of the transformer U14 is connected with one pin of the connector U8, seven pins of the transformer U14 are connected with two pins of the connector U8, and the connector U8 is connected with the ultrasonic transmitter 4; three pins and four pins of the transformer U14 are connected with the main control chip 12 respectively, five pins of the transformer U14 are connected with one end of the capacitor C45, one end of the resistor R40 and one end of the capacitor C41 respectively; the other end of the resistor R39 is connected with one end of the resistor R38, one end of the diode D9, one end of the capacitor C41, one end of the capacitor C42, one end of the capacitor C43 and one end of the capacitor C45 respectively, and the other end of the resistor R38 is connected with the power supply circuit 15; the other end of the diode D9, the other end of the capacitor C41, the other end of the capacitor C42, the other end of the capacitor C43, the other end of the capacitor C45 and the other end of the resistor R40 are grounded. Among them, the main control chip 15 adopts a G4 series main control chip, the main control chip of this model can generate a driving frequency of 2MHz, compared with other series chips, the frequency generated by the product has better anti-interference performance and reliability, and the maximum main frequency of the main control chip 15 can reach 170MHz.

[0036] As shown in the figure, Figure 5 The receiving circuit 14 includes:

[0037] The base of the triode Q3 is connected with one end of the resistor R43, one end of the resistor R44, one end of the capacitor C46, four feet of the switch diode D10 and one foot of the switch diode D10 respectively, the emitter of the triode Q3 is connected with one end of the resistor R46 and one end of the capacitor C47 respectively, the collector of the triode Q3 is connected with one end of the resistor R48, one end of the capacitor C50, two feet of the adjustable inductor U9, one foot of the connector U15 and the main control chip 12 respectively; the two feet of the switch diode D10 are connected with the power supply circuit 15, the three feet of the switch diode D10 are grounded; the other end of the capacitor C46 is connected with the two feet of the connector U7, one foot of the connector U7 is grounded, and the connector U7 is connected with the ultrasonic receiver 5; the other end of the resistor R43 is connected with the power supply circuit 15, the other end of the resistor R48, the other end of the capacitor C50 and one foot of the adjustable inductor U9 respectively; the other end of the capacitor C47 is connected with one end of the resistor R47, the other end of the resistor R44, the other end of the resistor R46 and the other end of the resistor R47 are grounded respectively. During the operation of the sending circuit 13, when the sending frequency reaches 2MHz, the frequency received by the ultrasonic receiver 5 in the still water is equivalent to the ultrasonic transmitter 4, the sensor is taken as a reference object, when directly facing the water flow, the change of the water flow will directly affect the frequency of the receiving end in direct proportion, in order to prevent the influence of noise, clutter and other environmental factors, the triode Q3 is used to filter noise and clutter while amplifying.

[0038] In addition, after passing through the sending circuit 13 and the receiving circuit 14, the utility model can extract the data related to the flow rate from the frequency difference through the multiplier, at this time, the extracted signal voltage is small, and the operation chip is difficult to extract, in order to better guarantee the reliability of the data, a double-channel amplification chip can be used to provide excellent differential gain and differential phase.

[0039] As shown in Figure 6 The power supply circuit 15 comprises:

[0040] One pin of power conversion chip U3 is connected with one end of capacitor C5, two pins of power conversion chip U3 are grounded, one end of resistor R36 and one end of resistor R37 are connected with three pins of power conversion chip U3 respectively, one end of resistor R35 is connected with four pins of power conversion chip U3, 24V external power supply, the other end of resistor R35 and one end of capacitor C6 are connected with five pins of power conversion chip U3 respectively, the other end of capacitor C5, one end of inductor L2 and cathode of diode D6 are connected with six pins of power conversion chip U3 respectively; the other end of capacitor C6 is grounded, anode of diode D6 is grounded, the other end of resistor R37 is grounded; the other end of inductor L2 is connected with the other end of resistor R36, one end of capacitor C44, one end of capacitor C37, one end of capacitor C8, one end of capacitor C39, the other end of resistor R43, two pins of switch diode D10 and the other end of resistor R38 respectively; the other end of capacitor C44, the other end of capacitor C37, the other end of capacitor C8 and the other end of capacitor C39 are grounded respectively.

[0041] In the power supply circuit 15, the power conversion chip U3 with model number TPMP2359 is adopted, and the chip has excellent load and line regulation.

[0042] Therefore, the utility model discloses a kind of maintenance-free corrosion-resistant card type ultrasonic flowmeter, ultrasonic transmitter and ultrasonic receiver are integrated in fluid passage inner wall, can send and receive ultrasonic signal in the liquid flow process, through measuring the time difference of ultrasonic propagation under the condition of downstream and upstream, accurately capture the change of fluid flow rate.

[0043] The utility model is further described in combination with drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the utility model and are not used to limit the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the present application.

Claims

1. A maintenance-free, corrosion-resistant card-type ultrasonic flow meter, characterized in that, The device includes a housing, which is card-shaped with a fluid channel built into the center. A control box is located on the top of the housing, and mounting limit holes are located on both sides of the housing. An ultrasonic transmitter and an ultrasonic receiver are mounted opposite each other on the inner wall of the fluid channel. The control box contains a main control chip, which is connected to the ultrasonic transmitter through a transmitting circuit and to the ultrasonic receiver through a receiving circuit.

2. The maintenance-free, corrosion-resistant card-type ultrasonic flow meter according to claim 1, characterized in that: The control box is also equipped with a display screen, a working indicator light, and a touch control panel. The main control chip is connected to the display screen, the working indicator light, and the touch control panel respectively.

3. The maintenance-free, corrosion-resistant card-type ultrasonic flow meter according to claim 1, characterized in that: The control box also includes a power supply circuit, which is connected to both the transmitting circuit and the receiving circuit.

4. The maintenance-free, corrosion-resistant card-type ultrasonic flow meter according to claim 3, characterized in that: The transmitting circuit includes: One pin of transformer U14 is connected to one pin of connector U8, the seventh pin of transformer U14 is connected to the second pin of connector U8, and connector U8 is connected to the ultrasonic transmitter. The third and fourth pins of transformer U14 are connected to the main control chip, and the fifth pin of transformer U14 is connected to the movement of resistor R40, one end of capacitor C45, and one end of resistor R39. The other end of resistor R39 is connected to one end of resistor R38, one end of diode D9, one end of capacitor C41, one end of capacitor C42, and one end of capacitor C43, respectively. The other end of resistor R38 is connected to the power supply circuit. The other ends of diode D9, capacitor C41, capacitor C42, capacitor C43, capacitor C45, and resistor R40 are grounded respectively.

5. The maintenance-free, corrosion-resistant card-type ultrasonic flow meter according to claim 4, characterized in that: The receiving circuit includes: The base of transistor Q3 is connected to one end of resistor R43, one end of resistor R44, one end of capacitor C46, ​​four pins of switching diode D10, and one pin of switching diode D10. The emitter of transistor Q3 is connected to one end of resistor R46 and one end of capacitor C47. The collector of transistor Q3 is connected to one end of resistor R48, one end of capacitor C50, two pins of adjustable inductor U9, one pin of connector U15, and the main control chip. The second pin of the switching diode D10 is connected to the power supply circuit, and the third pin of the switching diode D10 is grounded. Two pins of connector U7 are connected to the other end of capacitor C46, ​​one pin of connector U7 is grounded, and connector U7 is connected to the ultrasonic receiver. The other end of resistor R43 is connected to the power supply circuit, the other end of resistor R48, the other end of capacitor C50, and one pin of adjustable inductor U9. The other end of capacitor C47 is connected to one end of resistor R47, and the other ends of resistors R44, R46, and R47 are grounded respectively.

6. The maintenance-free, corrosion-resistant card-type ultrasonic flow meter according to claim 5, characterized in that: The power supply circuit includes: One pin of power converter chip U3 is connected to one end of capacitor C5; the second pin of power converter chip U3 is grounded; the third pin of power converter chip U3 is connected to one end of resistor R36 and one end of resistor R37; the fourth pin of power converter chip U3 is connected to one end of resistor R35; the fifth pin of power converter chip U3 is connected to the 24V external power supply, the other end of resistor R35, and one end of capacitor C6; and the sixth pin of power converter chip U3 is connected to the other end of capacitor C5, one end of inductor L2, and the cathode of diode D6. The bright end of capacitor C6 is grounded, the anode of diode D6 is grounded, and the other end of resistor R37 is grounded. The other end of inductor L2 is connected to the other end of resistor R36, one end of capacitor C44, one end of capacitor C37, one end of capacitor C8, one end of capacitor C39, the other end of resistor R43, pins 2 of switching diode D10, and the other end of resistor R38; the other ends of capacitor C44, capacitor C37, capacitor C8, and capacitor C39 are grounded respectively.

7. The maintenance-free, corrosion-resistant card-type ultrasonic flow meter according to claim 1, characterized in that: The control box is equipped with a dustproof and waterproof cover.

8. The maintenance-free, corrosion-resistant card-type ultrasonic flow meter according to claim 1, characterized in that: The inner wall of the fluid channel is coated with a polytetrafluoroethylene corrosion-resistant coating.

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