Ultrasonic heat meter and method of using the same

Abstract

The invention relates to the technical field of heat detection, and is an ultrasonic heat meter and a method for using the same, comprising a tube body, a rectifier assembly being axially mounted on the inner side of one end of the tube body, an ultrasonic assembly being radially mounted on the detection end of the tube body through an end cover, and a descaling assembly and an isolation assembly being sleeved on the circumference of the tube body; the advantages of adopting the tire appearance detection device are as follows: the descaling assembly wound on the outer side of the tube body is adopted, and an alternating electromagnetic field is generated by inputting a specified pulse frequency, so that the reflecting surface can be electromagnetically cleaned, thereby avoiding the influence of surface scaling on the reflection of ultrasonic waves; the rectifier assembly is adopted to forcibly change the velocity distribution in the tube body, so that the unknown velocity in the upstream becomes a known velocity, and the line-to-surface velocity ratio is used to eliminate the error offset under the premise of the known velocity; the ultrasonic transducer is adopted to provide the detection of the degree of scaling, the descaling program controls the magnitude of the pulse frequency according to the detection result, and then the descaling frequency can be automatically switched according to the actual scaling situation.

Description

Technical Field

[0001] The present invention relates to an ultrasonic heat meter and a method for using the same, and in particular to an appearance detection device for simultaneously collecting and comparing images of the inner and outer surfaces of a tire by adding a detection component, and a method for operating the ultrasonic heat meter of the present invention. Background Art

[0002] Ultrasonic heat meter is an instrument that measures flow rate and displays the heat energy released or absorbed by water flowing through a heat exchange system by ultrasonic method. It measures the physical quantities of heat carrier flow rate and inlet and outlet temperature through two sensors, and then obtains the heat value through density and enthalpy compensation and integral calculation. It is a mechatronics product based on microprocessors and high-precision sensors. Compared with the commonly used household meters - water meters, electricity meters, and gas meters, it has a more complex design and higher technical content.

[0003] Patent No. CN105716744B discloses an ultrasonic heat meter pipeline, including an inlet pipe section, a measuring pipe section and an outlet pipe section connected in sequence, the measuring pipe section is used to install an upstream transducer and a downstream transducer, and a reflecting surface for reflecting ultrasonic signals is fixed on the inner wall of the measuring pipe section, the angle between the reflecting surface and the axial direction of the measuring pipe section is an acute angle, and the angle between the normal of the reflecting surface and the plane where the inner wall of the measuring pipe section is located or the tangent of the inner wall is an acute angle, the ultrasonic signal emitted by the upstream transducer is reflected by the reflecting surface, and then reaches the downstream transducer after multiple reflections by the inner wall of the measuring pipe section, and the ultrasonic signal propagates in a spiral along the axial direction of the measuring pipe section. Compared with the prior art, the heat meter pipeline of the present invention has a spiral sound path, which prolongs the propagation path of ultrasonic waves, reduces errors, more accurately reflects the flow rate of the fluid, and improves the accuracy of heat measurement; however, the spiral propagation is overly dependent on the inner wall of the pipe section, and if scaling occurs on the inner wall of the pipe section and the reflecting surface, the measurement accuracy will be greatly reduced.

[0004] Patent No. CN102121854B discloses a V-shaped flow tube for ultrasonic heat meter, including a water inlet, a water outlet and a paired temperature sensor mounting hole on the tube body, and is characterized in that a V-shaped tube is provided on the tube body between the water inlet and the water outlet, and the two upper ports of the V-shaped tube are ultrasonic transducer mounting holes I and II respectively, and the bottom port of the V-shaped tube is sealed and connected with the ultrasonic reflection plug; the intersection of the two center lines of the V-shaped tube is on the reflection surface of the ultrasonic reflection plug. The problem that the existing heat meter can only ensure the measurement accuracy through a complex variable diameter structure is solved. Since a structure is adopted to reduce the number of ultrasonic reflections, the influence of the attenuation of repeated refraction of ultrasonic waves on the measurement accuracy is reduced, and the measurement accuracy is high and the pressure loss is small; however, the change to the flow channel is large, and the measured fluid is offset and turbulent, resulting in a large deviation between the calculated heat and the actual heat.

[0005] The accuracy of ultrasonic heat meters is seriously affected by temperature. As the temperature rises, the disordered movement of fluid molecules will become more intense. The change in temperature affects the fluid velocity distribution, which in turn exacerbates the offset of the measurement error. Therefore, it is necessary to collect temperature for measurement error compensation. In addition, if the sound wave attenuation is too severe, the voltage value converted by the transducer will not be enough to trigger the MCU for time capture, which will cause measurement errors. The reason for the attenuation of sound waves is the scaling phenomenon in pipeline transportation, which will reduce the transportation efficiency of the pipeline. At the same time, the scaling of the reflective surface in the reflective column will cause the attenuation of sound waves. Therefore, it is necessary to regularly clean the sediment on the reflective surface. When the fluid enters the pipeline at a certain speed and flows through the reflective column, vortex shedding will occur. The fluid is affected by the sharp structure at the leading edge of its reflective surface, resulting in boundary layer separation and vortex shedding, which in turn affects the measurement accuracy. Summary of the invention

[0006] In response to the above problems, the present application provides an ultrasonic heat meter and a method of using the same, which automatically detects the scaling degree of the reflecting surface and automatically performs electromagnetic cleaning on the ultrasonic reflecting surface, thereby avoiding the decrease in measurement accuracy caused by surface scaling affecting ultrasonic reflection.

[0007] An ultrasonic heat meter comprises a tube body, an end cover, a rectifying assembly, a descaling assembly, an isolating assembly, an ultrasonic assembly and a pin. The rectifying assembly is axially mounted on the inner side of one end of the tube body, the ultrasonic assembly is radially mounted on the detection end of the tube body through the end cover, and the descaling assembly and the isolating assembly are sheathed around the tube body.

[0008] The tube body includes a first external thread, a first reflective column, a second reflective column, a mounting column and a glass sealing sheet. The first external thread is arranged at both ends of the tube body. The side surface of the tube body is radially inwardly provided with a first reflective column and a second reflective column of the same structure at the introduction section and the outlet section respectively along the length direction. Taking the first reflective column as an example, its inner side is arranged as a cylindrical cavity structure that is conductive outward. The inclination directions of the first reflective surface and the second reflective surface are opposite, and both are inclined at forty-five degrees toward the inside of the tube.

[0009] The rectifying assembly includes a fixing ring, a cylinder, a first inner cylinder, a second inner cylinder, a third inner cylinder, a first guide plate, a concave shape and a second guide plate. The first inner cylinder, the second inner cylinder and the third inner cylinder are sequentially sleeved on the inner side of the cylinder from the inside to the outside. The three are radially connected to the cylinder through the guide plates respectively. A fixing ring is circumferentially provided on one end surface of the cylinder, and the other side is arranged to be concave in cooperation with each inner cylinder.

[0010] Furthermore, a plurality of first guide plates are provided, which are circumferentially equidistantly arranged between the second inner cylinder and the third inner cylinder, and a plurality of second guide plates are also provided, which are circumferentially equidistantly arranged between the first inner cylinder and the second inner cylinder and between the third inner cylinder and the cylinder body, respectively. The axial structure of the second guide plate is opposite to the direction of the structure of the first guide plate, and the radial structure of the second guide plate is the same as that of the first guide plate, but the two are staggered.

[0011] Furthermore, taking the second guide plate as an example, in its axial structure, the height of the first end is greater than the height of the second end, and the first end is located on one side of the fixing ring, and the first end to the second end is set as an arc transition, and in its radial structure, the second guide plate is set to be bent on both sides.

[0012] Furthermore, a mounting groove is provided on the inner side of the end of the tube body along the length direction, a plurality of first positioning holes are provided at the bottom of the mounting groove, a plurality of second positioning holes are axially arranged on the circumference of the fixing ring, and the pins axially connect the corresponding first positioning holes with the second positioning holes.

[0013] Furthermore, mounting columns with hollow inner sides are radially fixed at positions opposite to the first reflecting column and the second reflecting column in the side surface of the tube body, and a glass sealing sheet is provided at the connection between the mounting column and the tube body, and an inner thread is provided at the outer end thereof.

[0014] Furthermore, the outer side surface of the tube body can be respectively fixed with a first oblique column and a second oblique column whose outer end faces are inclined at forty-five degrees, and the end faces of the two are respectively parallel to the first reflecting surface and the second reflecting surface, the descaling component includes a first coil and a second coil, the first coil is wound between the outer peripheral surfaces of the first oblique column and the first reflecting column, and the second coil is wound between the outer peripheral surfaces of the second oblique column and the second reflecting column, the isolation component includes a first soft magnetic film, a second soft magnetic film and a heat shrink tube, the second soft magnetic film is wound around the peripheral surface between the first oblique column and the second oblique column in the tube body, the first soft magnetic film is respectively wound around the peripheral surface outside the first oblique column and the second oblique column in the tube body, and both are fixedly connected to the tube body through the heat shrink tube.

[0015] Furthermore, the descaling component may include a third coil, which is wound around the circumference between the first oblique column and the second oblique column in the tube body. The isolation component includes a first soft magnetic film and a heat shrink tube, and the first soft magnetic film is respectively arranged on the circumference outside the first oblique column and the second oblique column in the tube body through the heat shrink tube.

[0016] The ultrasonic component includes a first transducer and a second transducer, which are respectively installed in the mounting column. A wire hole is provided in the middle of the end cover. The end cover is threaded with the internal thread through a second external thread arranged circumferentially. The signal end of the transducer faces the side of the glass sealing sheet, and the power line of its wiring terminal passes through the wire hole.

[0017] The first method of using the needle of the present invention for performing automatic descaling operation includes:

[0018] S1. Close the valve of the circulation pipeline, and connect the pipe body to the circulation pipeline in series through the first external threads on both sides;

[0019] S2, the first transducer is used as the sound wave transmitting end, and the second transducer is used as the sound wave receiving end to record the time of sound wave transmission and the amplitude;

[0020] S3. Subsequently, the first transducer acts as a sound wave receiving end, and the second transducer acts as a sound wave transmitting end, records the time of the second sound wave transmission, and calculates the time difference between the two sound wave transmissions;

[0021] S4. At the same time, the temperature detection end of the ultrasonic heat meter collects the temperature information of the fluid, the processor calculates the instantaneous heat, and outputs the accumulated heat externally;

[0022] S5. When the processor detects that the amplitude becomes low, it determines that scaling occurs on the first and second reflective surfaces in the tube body, and then sends a descaling instruction;

[0023] S6, in the descaling procedure, after judging that the amplitude is lower than the reasonable range, the variable frequency power supply supplies three pulse frequencies of A1-A3 from weak to strong to the first coil and the second coil in turn, and the supply time of each frequency is T. After the coil is energized, an alternating magnetic field is generated in the pipe body, and the electromagnetic field operates on the scaling substances on the surface of the reflective surface to achieve a descaling effect;

[0024] S7. After descaling is completed, the amplitude is tested again. If the amplitude is normal, the heat is calculated. If the amplitude is abnormal, the machine is shut down and an alarm is sounded.

[0025] The second method of using the needle of the present invention for performing automatic descaling operation includes:

[0026] S1, close the valve of the circulation pipeline, and connect the pipe body 1 in series in the circulation pipeline through the first external threads on both sides;

[0027] S2, the heat detection end of the ultrasonic heat meter sends sound waves alternately through the first transducer and the second transducer, and records the time difference and amplitude curve of the two received sound waves;

[0028] S3. At the same time, the temperature detection end of the ultrasonic heat meter collects the temperature information of the fluid, the processor calculates the instantaneous heat, and outputs the accumulated heat externally;

[0029] S4. When the processor detects that the amplitude becomes low, it is determined that the first reflective surface and the second reflective surface in the tube body are scaled, and then a descaling instruction is sent;

[0030] S5, in the descaling procedure, after judging that the amplitude is lower than the reasonable range, the variable frequency power supply runs at the A1 frequency for the specified time T, and the counter is recorded as 1. By adding a counter to the descaling procedure, the variable frequency power supply automatically selects different operating frequencies based on different scaling conditions;

[0031] S6. After the specified time T is over, the wave value information is received again to determine the amplitude. If the amplitude is normal, the value of the counter is reset to zero and the descaling procedure is terminated.

[0032] S7, if the amplitude is abnormal, the variable frequency power supply continues to run at the A2 frequency for the specified time T, the counter is recorded, and after the specified time T is over, the wave value information is received again to judge the amplitude. If the amplitude is normal, the counter value is reset to zero and the descaling program is terminated;

[0033] S8, if the amplitude is abnormal, the variable frequency power supply continues to run at the A3 frequency for the specified time T, the counter is recorded, and after the specified time T is over, the wave value information is received again to judge the amplitude. If the amplitude is normal, the counter value is reset to zero and the descaling program is terminated;

[0034] S9. If the amplitude is still abnormal, the variable frequency power supply will shut down and alarm.

[0035] Compared with the prior art, the present invention has the following beneficial technical effects:

[0036] 1. The present invention provides a coil wound around the outside of the tube body, which generates an alternating electromagnetic field by inputting a specified pulse frequency, thereby electromagnetically cleaning the reflective surface, thereby avoiding the influence of surface scaling on the reflection of ultrasonic waves;

[0037] 2. Use the rectifier component to forcibly change the velocity distribution in the tube body, so that the unknown velocity upstream becomes a known velocity, and use the line-to-surface velocity ratio to eliminate the error offset under the premise of known velocity, while suppressing the generation of large-scale vortices;

[0038] 3. The coil is wound between the oblique column and the outer circumference of the reflective column to make the direction of the alternating electromagnetic field parallel to the reflective surface, so as to further improve the descaling efficiency.

[0039] 4. The unwound coil area outside the tube body is wrapped with a soft magnetic film to ensure that the magnetic field extends axially inside the tube body to reduce the energy loss of the magnetic field;

[0040] 5. The use of ultrasonic transducers can provide detection of scaling degree. The descaling program controls the pulse frequency according to the detection results, and then automatically switches the descaling frequency according to the actual scaling situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1It is a three-dimensional diagram of an ultrasonic heat meter of the present invention;

[0042] Figure 2 is a cross-sectional view of the three-dimensional structure of the present invention;

[0043] Figure 3 It is an exploded view of the three-dimensional structure of the present invention after sectioning;

[0044] Figure 4 It is a side cross-sectional view of the present invention in a downstream state;

[0045] Figure 5 It is a side cross-sectional view of the present invention in a countercurrent state;

[0046] Figure 6 It is a three-dimensional diagram after deformation of the present invention;

[0047] Figure 7 It is a cross-sectional view of the three-dimensional structure after deformation of the present invention;

[0048] Figure 8 is a three-dimensional diagram of the rectifying assembly in the present invention;

[0049] Fig. 9 is a cross-sectional view of the rectifying assembly structure of the present invention;

[0050] Fig.10 It is a front view of the rectifier assembly in the present invention;

[0051] Fig.11 It is the principle diagram of the main program in the present invention;

[0052] Fig.12 It is a schematic diagram of the descaling procedure 1 in the present invention;

[0053] Fig.13 It is the principle diagram of the second descaling procedure in the present invention.

[0054] 1: Tube body, 2: End cap, 3: Rectification component, 4: Descaling component, 5: Isolation component, 6: Ultrasonic component, 7: Pin,

[0055] 11: first external thread, 12: mounting groove, 13: first reflective column, 14: second reflective column, 15: mounting column, 16: first oblique column, 17: second oblique column, 18: first positioning hole, 19: glass sealing sheet,

[0056] 131: first reflection surface, 132: cylindrical cavity,

[0057] 141: second reflecting surface,

[0058] 151: Internal thread,

[0059] 21: through hole, 22: second external thread,

[0060] 31: fixed ring, 32: cylinder, 33: first inner cylinder, 34: second inner cylinder, 35: third inner cylinder, 36: first guide plate, 37: concave shape, 38: second guide plate,

[0061] 311: second positioning hole,

[0062] 381: first end, 382: second end, 383: arc transition, 384: bend,

[0063] 41: first coil, 42: second coil, 43: third coil,

[0064] 51: first soft magnetic film, 52: second soft magnetic film, 53: heat shrink tube,

[0065] 61: first transducer, 62: second transducer, 63: connection terminal, 64: signal terminal. DETAILED DESCRIPTION

[0066] The specific implementation of the present invention is described below in conjunction with the accompanying drawings and embodiments:

[0067] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0068] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0069] Embodiment 1, in addition to any of the above embodiments, this embodiment also provides an ultrasonic heat meter, combined with Figure 6 and Figure 7 , including a tube body 1, an end cover 2, a descaling component 4, an isolation component 5, an ultrasonic component 6 and a pin 7. The detection end of the tube body 1 is radially installed with an ultrasonic component 6 through the end cover 2. The descaling component 4 and the isolation component 5 are sleeved around the tube body 1. The descaling component 4 includes a third coil 43, which is wound on the circumference between the first oblique column 16 and the second oblique column 17 in the tube body 1. The direction of the magnetic field generated by this structure is the same as the length direction of the tube body 1, which can play a good descaling role on the tube wall.

[0070] When measuring flow, the present invention uses the time difference method. The time difference method requires a pair of ultrasonic transducers to alternately transmit and receive each other's ultrasonic signals, and record the propagation time of the ultrasonic wave in the upstream and downstream states, and complete a flow measurement according to the time difference; the transmission speed of the ultrasonic wave in the static fluid is C, and the cross-sectional area of ​​the pipeline is S; the first transducer transmits a signal, and the second transducer receives a signal. The effective propagation time of the ultrasonic wave in the downstream is T1; the first transducer receives a signal, and the second transducer sends a signal. The effective propagation time of the ultrasonic wave in the upstream is T2. Assuming that the average linear velocity of the fluid in the pipeline is VL, then:

[0071]

[0072] By stabilizing the line-to-surface velocity ratio K=VL÷VS in the flow field, the line average velocity VL is converted into the surface average velocity VS on the pipe cross section, and the flow rate Q is calculated according to the formula below. It is known that the flow rate Q is related to the time difference of ultrasonic propagation.

[0073] Combination Figure 7 The isolation component 5 includes a first soft magnetic film 51 and a heat shrink tube 53. The first soft magnetic film 51 is respectively arranged on the circumferential surface outside the first oblique column 16 and the second oblique column 17 in the tube body 1 through the heat shrink tube 53. The soft magnetic film in this structure has the characteristic of high saturation magnetic permeability, which can effectively prevent the magnetic field from passing through the first soft magnetic film 51, thereby increasing the axial range of the magnetic field.

[0074] Embodiment 2: This embodiment provides an ultrasonic heat meter, combined with Figure 1 and Figure 2 , including a tube body 1, an end cover 2, a descaling component 4, an isolation component 5, an ultrasonic component 6 and a pin 7. The outer side surface of the tube body 1 is respectively fixed with a first oblique column 16 and a second oblique column 17, whose outer end faces are inclined at forty-five degrees, and the end faces of the two are respectively parallel to the first reflecting surface 131 and the second reflecting surface 141, so that the magnetic field direction of the descaling component 4 corresponds to the reflecting surface in the same direction, further improving the descaling efficiency of the reflecting surface.

[0075] Combination Figure 2 The side surface of the tube body 1 is provided with a first reflecting column 13 and a second reflecting column 14 with the same structure radially inwardly in the introduction section and the outlet section respectively along the length direction. The first reflecting column 13 and the second reflecting column 14 in the side surface of the tube body 1 are radially fixed with inner hollow mounting columns 15 at opposite positions. The first external thread 11 is provided at both ends of the tube body 1. The present structure takes the first reflecting column 13 as an example, and its inner side is provided with a cylindrical cavity 132 structure that is conductive outwardly. The first reflecting surface 131 and the second reflecting surface 141 are inclined in opposite directions, and both are inclined inwardly of the tube at a 45 degree angle. Figure 4 and Figure 5When the first transducer 61 emits a sound wave signal radially, the propagation path can be changed to the direction of the central axis through the first reflecting surface 131. After refraction by the second reflecting surface 141, the second transducer 62 is radially received by the sound wave signal; when the second transducer 62 emits a sound wave signal radially, the propagation path is the same but the direction is opposite.

[0076] By detecting the attenuation of ultrasonic waves, it can be determined whether the reflective surface is scaled, and then whether to start the descaling program. The attenuation coefficient of ultrasonic waves is proportional to the square of the vibration frequency, that is, the higher the vibration frequency. The larger the attenuation coefficient, the faster the sound wave decays, which prompts the start of electromagnetic cleaning of the reflective surface. The calculation formula of the ultrasonic attenuation coefficient is:

[0077]

[0078] in, Indicates force viscosity; λ r represents thermal conductivity; c represents the propagation speed of ultrasonic wave; represents the fluid density; c V and c p They represent the specific heat capacity at constant volume and the specific heat capacity at constant pressure respectively. Then, by detecting the vibration frequency of the sound wave signal received by the transducer, it is possible to determine whether the reflecting surface is contaminated and whether the transmission of the sound wave is affected.

[0079] Combination Figure 4 and Figure 5 The descaling component 4 includes a first coil 41 and a second coil 42. The first coil 41 is wound between the outer circumference of the first oblique column 16 and the first reflecting column 13, and the second coil 42 is wound between the outer circumference of the second oblique column 17 and the second reflecting column 14. In this structure, an alternating electromagnetic field can be generated by inputting a specified pulse frequency to the coil, thereby electromagnetically cleaning the reflecting surface.

[0080] Combination Figure 5 The isolation component 5 includes a first soft magnetic film 51, a second soft magnetic film 52 and a heat shrink tube 53. The second soft magnetic film 52 is wound around the circumference between the first oblique column 16 and the second oblique column 17 in the tube body 1. The first soft magnetic film 51 is respectively wound around the circumference outside the first oblique column 16 and the second oblique column 17 in the tube body 1, and both are fixedly connected to the tube body 1 through the heat shrink tube 53.

[0081] Combination Figure 3The ultrasonic component 6 includes a first transducer 61 and a second transducer 62, which are respectively installed in the mounting column 15. In this structure, a glass sealing sheet 19 is provided at the connection between the mounting column 15 and the tube body 1, and an internal thread 151 is provided at the outer end thereof. A wire hole 21 is provided in the middle of the end cover 2. The end cover 2 is threaded with the internal thread 151 through a second external thread 22 arranged circumferentially, and the signal end 64 of the transducer faces the side of the glass sealing sheet 19, and the power line of the terminal 63 thereof passes through the wire hole 21.

[0082] Embodiment 3, in addition to any of the above embodiments, this embodiment further provides an ultrasonic heat meter, Figures 8 to 10 , and also includes a rectifying component 3. The rectifying component 3 is axially installed on the inner side of one end of the tube body 1. The rectifying component 3 can filter large-sized impurities at the entrance of the ultrasonic heat meter, and at the same time improve the turbulent state of the water flow in the tube body 1, thereby improving the detection accuracy; the rectifying component 3 can change the velocity distribution of the fluid in the tube body 1, thereby increasing the average velocity of the fluid on the effective propagation path. The increase in the average velocity can increase the propagation time difference of the ultrasonic wave in the downstream and upstream flow, and improve the detection accuracy by improving the signal-to-noise ratio of the ultrasonic heat meter measurement. The high flow rate causes the separated vortex to attach to the reflecting cylinder again to form a stationary vortex, so as to reduce the number of shedding vortices.

[0083] Combination Figure 8 The rectifying assembly 3 includes a cylinder 32, and the inner side of the cylinder 32 is sequentially sleeved with a first inner cylinder 33, a second inner cylinder 34 and a third inner cylinder 35 from the inside to the outside. The three are radially connected to the cylinder 32 through guide plates. A fixing ring 31 is circumferentially provided at the end surface of one side of the cylinder 32, and the other side is matched with each inner cylinder to be set as a concave shape 37. In this structure, a mounting groove 12 is provided on the inner side of the end of the tube body 1 along the length direction, and a plurality of first positioning holes 18 are provided at the bottom of the mounting groove 12. A plurality of second positioning holes 311 are axially arranged on the circumference of the fixing ring 31, and the pins 7 axially connect the corresponding first positioning holes 18 with the second positioning holes 311 respectively.

[0084] Combination Fig. 9 There are a plurality of first guide plates 36, which are evenly and equidistantly arranged between the second inner cylinder 34 and the third inner cylinder 35 in the circumferential direction. There are also a plurality of second guide plates 38, which are evenly and equidistantly arranged between the first inner cylinder 33 and the second inner cylinder 34 and between the third inner cylinder 35 and the cylinder body 32 in the circumferential direction.

[0085] Combination Fig. 9 and Fig.10The axial structure of the second guide plate 38 is opposite to that of the first guide plate 36, and the radial structure of the second guide plate 38 is the same as that of the first guide plate 36, but the two are arranged in a staggered manner. Taking the second guide plate 38 as an example, in its axial structure, the height of the first end 381 is greater than the height of the second end 382, ​​and the first end 381 is located on one side of the fixing ring 31, and the first end 381 to the second end 382 is set as an arc transition 383. In its radial structure, the second guide plate 38 is set to bends 384 on both sides. In this structure, there is a swirl phenomenon in the fluid before entering the rectifier assembly 3, and the bend 384 can correct the swirl of the fluid, so that it forms a more uniform fluid form when it is exported, and the arc transition 383 between the second guide plate 38 and the first guide plate 36 forms a closed shape, so that the average speed of the fluid in the propagation path is improved.

[0086] Embodiment 4, combined Fig.11 and Fig.12 This embodiment provides a method for using an ultrasonic heat meter, which uses the aforementioned ultrasonic heat meter to automatically detect the scaling degree of the reflective surface and automatically clean it, and the steps include:

[0087] S1, close the valve of the circulation pipeline, and connect the pipe body 1 to the circulation pipeline in series through the first external threads 11 on both sides;

[0088] S2. Combination Fig.11 , the first transducer 61 is used as a sound wave transmitting end, and the second transducer 62 is used as a sound wave receiving end, recording the time of sound wave transmission and the amplitude;

[0089] S3, then, the first transducer 61 acts as a sound wave receiving end, and the second transducer 62 acts as a sound wave transmitting end, records the time of the second sound wave transmission, and calculates the time difference between the two sound wave transmissions;

[0090] S4. At the same time, the temperature detection end of the ultrasonic heat meter collects the temperature information of the fluid, the processor calculates the instantaneous heat, and outputs the accumulated heat externally;

[0091] S5. When the processor detects that the amplitude becomes low, it determines that scaling occurs on the first reflective surface 131 and the second reflective surface 141 in the tube body 1, and then sends a descaling instruction;

[0092] S6. Combination Fig.12 In the descaling procedure, after judging that the amplitude is lower than the reasonable range, the variable frequency power supply supplies three pulse frequencies of A1-A3 from weak to strong to the first coil 41 and the second coil 42 in turn, and the supply time of each frequency is T. After the coil is energized, an alternating magnetic field is generated in the tube body 1, and the electromagnetic field operates on the scaling substances on the surface of the reflective surface to achieve a descaling effect;

[0093] S7. After descaling is completed, the amplitude is tested again. If the amplitude is normal, the heat is calculated. If the amplitude is abnormal, the machine is shut down and an alarm is sounded.

[0094] Embodiment 5, combined Fig.11 and Fig.13 This embodiment provides a method for using an ultrasonic heat meter, which uses the aforementioned ultrasonic heat meter to automatically detect the scaling degree of the reflective surface and automatically clean it, provides scaling degree detection and controls the magnitude of the pulse frequency in D3 according to the detection result, and the steps include:

[0095] S1, close the valve of the circulation pipeline, and connect the pipe body 1 in series in the circulation pipeline through the first external threads 11 on both sides;

[0096] S2. Combination Fig.11 , the heat detection end of the ultrasonic heat meter sends sound waves alternately through the first transducer 61 and the second transducer 62, and records the time difference and amplitude curve of the two received sound waves;

[0097] S3. At the same time, the temperature detection end of the ultrasonic heat meter collects the temperature information of the fluid, the processor calculates the instantaneous heat, and outputs the accumulated heat externally;

[0098] S4, when the processor detects that the amplitude becomes low, it is determined that the first reflective surface 131 and the second reflective surface 141 in the tube body 1 are scaled, and then a descaling instruction is sent;

[0099] S5. Combination Fig.13 In the descaling procedure, after judging that the amplitude is lower than the reasonable range, the variable frequency power supply runs at the frequency A1 for the specified time T, and the counter is recorded as 1. In this structure, by adding a timer subroutine, the descaling component 4 can be cleaned at the current frequency, and the frequency can be changed based on this frequency at the next detection;

[0100] S6. After the specified time T is over, the wave value information is received again to determine the amplitude. If the amplitude is normal, the value of the counter is reset to zero and the descaling procedure is terminated.

[0101] S7, if the amplitude is abnormal, the variable frequency power supply continues to run at the A2 frequency for the specified time T, the counter is recorded as 2, and after the specified time T, the wave value information is received again to determine the amplitude. If the amplitude is normal, the counter value is reset to zero and the descaling program is terminated;

[0102] S8, if the amplitude is abnormal, the variable frequency power supply continues to run at the A3 frequency for the specified time T, the counter is recorded as 3, and after the specified time T, the wave value information is received again to determine the amplitude. If the amplitude is normal, the counter value is reset to zero and the descaling program is terminated;

[0103] S9. If the amplitude is still abnormal, it means that the scaling is difficult to remove or the descaling component fails, the variable frequency power supply shuts down and alarms.

Claims

1. An ultrasonic heat meter, comprising a tube body (1), an end cover (2), a rectifying component (3), a descaling component (4), an isolating component (5), an ultrasonic component (6) and a pin (7), characterized in that: A rectifying component (3) is axially mounted on the inner side of one end of the tube body (1), an ultrasonic component (6) is radially mounted on the detection end of the tube body (1) via an end cover (2), and a descaling component (4) and an isolation component (5) are sheathed around the tube body (1). The rectifying assembly (3) comprises a fixing ring (31), a cylinder (32), a first inner cylinder (33), a second inner cylinder (34), a third inner cylinder (35), a first guide plate (36), an inner concave shape (37), and a second guide plate (38). The inner side of the cylinder (32) is provided with a first inner cylinder (33), a second inner cylinder (34) and a third inner cylinder (35) in sequence from the inside to the outside, and the three inner cylinders are radially connected to the cylinder (32) via guide plates. A fixing ring (31) is circumferentially provided on one end surface of the cylinder (32), and the other end is configured to be in a concave shape (37) in cooperation with each inner cylinder. The first guide plates (36) are provided in a plurality and are evenly and equidistantly arranged between the second inner cylinder (34) and the third inner cylinder (35) in the circumferential direction. The second guide plates (38) are also provided in a plurality and are evenly and equidistantly arranged between the first inner cylinder (33) and the second inner cylinder (34) and between the third inner cylinder (35) and the cylinder body (32) in the circumferential direction. The axial structure of the second guide plate (38) is opposite to the structure of the first guide plate (36), and the radial structure of the second guide plate (38) is the same as the structure of the first guide plate (36), but the two are arranged in a staggered manner. Taking the second guide plate (38) as an example, in its axial structure, the height of the first end (381) is greater than the height of the second end (382), and the first end (381) is located on one side of the fixing ring (31), and the first end (381) to the second end (382) is set as an arc transition (383), and in its radial structure, both sides of the second guide plate (38) are set as a bend (384).

2. An ultrasonic heat meter according to claim 1, characterized in that: The tube body (1) comprises a first external thread (11), a first reflective column (13), a second reflective column (14), a mounting column (15) and a glass sealing sheet (19), wherein the first external thread (11) is provided at both ends of the tube body (1). The side surface of the tube body (1) is provided with a first reflection column (13) and a second reflection column (14) having the same structure radially inwardly at the inlet section and the outlet section respectively along the length direction. Taking the first reflection column (13) as an example, the inner side thereof is provided with a cylindrical cavity (132) structure that is conductive outwardly. The first reflection surface (131) and the second reflection surface (141) are inclined in opposite directions, and both are inclined inwardly of the tube at a 45-degree angle. In the side surface of the tube body (1), opposite positions of the first reflective column (13) and the second reflective column (14) are respectively radially fixed with mounting columns (15) with hollow interiors, and a glass sealing sheet (19) is provided at the connection point between the mounting column (15) and the tube body (1), and an internal thread (151) is provided at the outer end thereof.

3. An ultrasonic heat meter according to claim 2, characterized in that: The outer side surface of the tube body (1) is respectively fixed with a first oblique column (16) and a second oblique column (17) whose outer end surfaces are inclined at forty-five degrees, and their end surfaces are respectively parallel to the first reflection surface (131) and the second reflection surface (141).

4. An ultrasonic heat meter according to claim 3, characterized in that: The descaling assembly (4) comprises a first coil (41) and a second coil (42), wherein the first coil (41) is wound between the outer circumference of the first oblique column (16) and the first reflective column (13), and the second coil (42) is wound between the outer circumference of the second oblique column (17) and the second reflective column (14). The isolation component (5) comprises a first soft magnetic film (51), a second soft magnetic film (52) and a heat shrink tube (53); the second soft magnetic film (52) is wound around the circumference between the first oblique column (16) and the second oblique column (17) in the tube body (1); the first soft magnetic film (51) is respectively wound around the circumference outside the first oblique column (16) and the second oblique column (17) in the tube body (1), and both are fixedly connected to the tube body (1) via the heat shrink tube (53).

5. An ultrasonic heat meter according to claim 2, characterized in that: The descaling assembly (4) comprises a third coil (43), the third coil (43) being wound around the circumference between the first oblique column (16) and the second oblique column (17) in the tube body (1). The isolation component (5) comprises a first soft magnetic film (51) and a heat shrink tube (53), wherein the first soft magnetic film (51) is respectively arranged on the outer peripheral surfaces of the first oblique column (16) and the second oblique column (17) in the tube body (1) through the heat shrink tube (53).

6. An ultrasonic heat meter according to any one of claims 1 and 2, characterized in that: The ultrasonic component (6) comprises a first transducer (61) and a second transducer (62), both of which are respectively mounted in a mounting column (15). A wire hole (21) is provided in the middle of the end cover (2), the end cover (2) is threadedly connected to the internal thread (151) via a second external thread (22) arranged in a circumferential direction, and the signal end (64) of the transducer faces the side of the glass sealing sheet (19), and the power line of the connection end (63) thereof passes through the wire hole (21). The tube body (1) is provided with a mounting groove (12) on the inner side of the end portion along the length direction, a plurality of first positioning holes (18) are arranged at the bottom of the mounting groove (12), a plurality of second positioning holes (311) are axially arranged on the circumference of the fixing ring (31), and the pins (7) axially connect the corresponding first positioning holes (18) with the second positioning holes (311) respectively.

7. A method for using an ultrasonic heat meter, characterized in that: The specific steps include: S1, closing the valve of the circulation pipeline, and connecting the pipe body (1) in series to the circulation pipeline through the first external threads (11) on both sides; S2, the first transducer (61) serves as a sound wave transmitting end, and the second transducer (62) serves as a sound wave receiving end, recording the time of sound wave transmission and the wave amplitude; S3. Subsequently, the first transducer (61) serves as a sound wave receiving end, and the second transducer (62) serves as a sound wave transmitting end, records the time of the second sound wave transmission, and calculates the time difference between the two sound wave transmissions; S4. At the same time, the temperature detection end of the ultrasonic heat meter collects the temperature information of the fluid, the processor calculates the instantaneous heat, and outputs the accumulated heat externally; S5. When the processor detects that the amplitude becomes low, it determines that scaling has occurred on the first reflecting surface (131) and the second reflecting surface (141) in the tube body (1), and then sends a descaling instruction; S6, in the descaling procedure, after judging that the amplitude is below a reasonable range, the variable frequency power supply supplies three pulse frequencies of A1-A3 from weak to strong to the first coil (41) and the second coil (42) in sequence, and the supply time of each frequency is T. After the coil is energized, an alternating magnetic field is generated in the tube body (1), and the electromagnetic field operates on the scaling substances on the surface of the reflective surface to achieve a descaling effect; S7. After descaling is completed, the amplitude is tested again. If the amplitude is normal, the heat is calculated. If the amplitude is abnormal, the machine is shut down and an alarm is sounded.

8. A method for using an ultrasonic heat meter, characterized in that: The specific steps include: S1, closing the valve of the circulation pipeline, and connecting the pipe body (1) in series in the circulation pipeline through the first external threads (11) on both sides; S2, the heat detection end of the ultrasonic heat meter sends sound waves alternately through the first transducer (61) and the second transducer (62), and records the time difference and amplitude curve of the two received sound waves; S3. At the same time, the temperature detection end of the ultrasonic heat meter collects the temperature information of the fluid, the processor calculates the instantaneous heat, and outputs the accumulated heat externally; S4, when the processor detects that the amplitude becomes low, it determines that the first reflection surface (131) and the second reflection surface (141) in the tube body (1) are scaled, and then sends a descaling instruction; S5, in the descaling procedure, after judging that the amplitude is lower than the reasonable range, the variable frequency power supply runs at the frequency A1 for the specified time T, and the counter is recorded as 1; S6. After the specified time T is over, the wave value information is received again to determine the amplitude. If the amplitude is normal, the value of the counter is reset to zero and the descaling procedure is terminated. S7, if the amplitude is abnormal, the variable frequency power supply continues to run at the A2 frequency for the specified time T, the counter is recorded as 2, and after the specified time T, the wave value information is received again to determine the amplitude. If the amplitude is normal, the counter value is reset to zero and the descaling program is terminated; S8, if the amplitude is abnormal, the variable frequency power supply continues to run at the A3 frequency for the specified time T, the counter is recorded as 3, and after the specified time T, the wave value information is received again to determine the amplitude. If the amplitude is normal, the counter value is reset to zero and the descaling program is terminated; S9. If the amplitude is still abnormal, it means that the scaling is difficult to remove or the descaling component fails, the variable frequency power supply shuts down and alarms.

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