CN220960188U - External clamping type ultrasonic flow sensor - Google Patents

Abstract

The utility model discloses an external clamping type ultrasonic flow sensor, relates to the technical field of ultrasonic flow sensors, and solves the technical problems that an existing ultrasonic flow sensor is large in size, limited in application range and inconvenient to assemble. The device comprises a shell, a transmission line head and an acoustic wedge arranged in the shell; the shell is provided with an accommodating cavity and a connecting through hole; the sound wedge is obliquely arranged in the shell and matched with the accommodating cavity; the accommodating cavity is communicated with the connecting through hole; the transmission line head penetrates into the connecting through hole to be connected with the acoustic wedge. According to the utility model, the shell with an integrated structure is arranged, the accommodating cavity matched with the acoustic wedge and the connecting through hole communicated with the accommodating cavity are arranged on the shell, the transmission line head is directly connected with the acoustic wedge in the accommodating cavity through the connecting through hole, the volume of the sensor is reduced, the assembly is convenient, and the sensor is suitable for smaller pipelines to be tested.

Description

External clamping type ultrasonic flow sensor

Technical Field

The utility model relates to the technical field of ultrasonic flow sensors, in particular to an external clamping type ultrasonic flow sensor.

Background

The ultrasonic flow sensor is a non-contact measuring instrument, is mainly used for measuring the flow of various single uniform liquids capable of conducting ultrasonic waves based on acoustic Doppler effect, has wide application in various fields of chemical industry, metallurgy, medicine, water supply and the like, can be used for measuring the flow of medium with large pipe diameter, and can be used for measuring the medium which is not easy to contact and observe. The ultrasonic flow sensor is fixed on the detected pipeline and is matched with the signal processing device for use to measure the flow velocity of the fluid. The basic principle of the operation of the ultrasonic sensor is that a pair of ultrasonic sensors are respectively arranged at the upstream and the downstream of the fluid to be measured, the emitting surfaces of the two ultrasonic sensors emit and receive pulse signals in turn relative to each other, and the signal processing device calculates the flow velocity of the fluid by measuring the difference between the forward and backward propagation speeds of ultrasonic pulses between known distances.

Ultrasonic flow sensor in the present market contains casing, potsherd, sound wedge etc. the casing is upper and lower casing, and the cooperation forms and holds the chamber, holds the intracavity and is provided with a plurality of structures, like sound wedge, binding post etc. and has the interval between a plurality of structures, increases the volume easily to be provided with the wiring chamber, the wiring chamber makes the sensor volume increase easily, is not applicable to the velocity of flow of measuring the intraductal circulation of little, and the casing is complicated simultaneously, and needs inside wiring, inconvenient equipment.

In the process of implementing the present utility model, the inventor finds that at least the following problems exist in the prior art:

The existing ultrasonic flow sensor has large volume, limited application range and inconvenient assembly.

Disclosure of utility model

The utility model aims to provide an external clamping type ultrasonic flow sensor, which solves the technical problems of larger volume, limited application range and inconvenient assembly of the existing ultrasonic flow sensor in the prior art. The preferred technical solutions of the technical solutions provided by the present utility model can produce a plurality of technical effects described below.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The utility model provides an external clamping type ultrasonic flow sensor which comprises a shell, a transmission line head and an acoustic wedge arranged in the shell, wherein the shell is provided with a plurality of grooves; the shell is provided with an accommodating cavity and a connecting through hole; the sound wedge is obliquely arranged in the shell and matched with the accommodating cavity; the accommodating cavity is communicated with the connecting through hole; the transmission line head penetrates into the connecting through hole to be connected with the acoustic wedge.

Preferably, an included angle between the central line of the accommodating cavity and a vertical plane of the horizontal plane of the bottom of the shell is within a certain preset range; the cavity opening of the accommodating cavity is arranged at the bottom of the shell; the bottom of the shell is abutted with the pipeline to be tested.

Preferably, the preset range is 24 DEG 27 '-48 DEG 36'.

Preferably, the connecting through hole is arranged on the side surface of the shell, and one end of the connecting through hole is connected with the accommodating cavity.

Preferably, the shell is provided with a magnet structure and two clamping grooves; the two clamping grooves are oppositely arranged at the top of the shell and are used for limiting the fixing belt; the magnet structure is arranged at the bottom of the shell.

Preferably, the acoustic wedge comprises a crystal seat, a crystal structure and a crystal gland; the crystal seat is provided with a concave part which can be used for accommodating the crystal structure; the crystal gland is matched with the concave part and fixed on the crystal seat.

Preferably, the crystal pressing cover is provided with a through hole structure; the transmission line head can be connected with the crystal structure through the through hole structure.

Preferably, the crystal structure is a piezoelectric ceramic wafer, and the resonance frequency of the piezoelectric ceramic wafer is 1MHz + -50K or 2MHz + -100K.

Preferably, the speed of the ultrasonic wave transmitted by the crystal seat is 2000-3000 m/s.

Preferably, the transmission line head comprises a wire, a cable head and a cable; the wire is electrically connected with the cable through the cable head; the conducting wires are made of hard metal; the lead is in a bent shape and can be inserted into the through hole structure.

By implementing one of the technical schemes, the utility model has the following advantages or beneficial effects:

According to the utility model, the shell with an integrated structure is arranged, the accommodating cavity matched with the acoustic wedge and the connecting through hole communicated with the accommodating cavity are arranged on the shell, the transmission line head is directly connected with the acoustic wedge in the accommodating cavity through the connecting through hole, the volume of the sensor is reduced, the assembly is convenient, and the sensor is suitable for smaller pipelines to be tested.

Drawings

For a clearer description of the technical solutions of embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art, in which:

FIG. 1 is an exploded view of an embodiment of an external clip-on ultrasonic flow sensor of the present utility model;

FIG. 2 is a perspective view of an embodiment of an external clip-on ultrasonic flow sensor of the present utility model;

FIG. 3 is a schematic view of an acoustic wedge explosion of an embodiment of the external clamp ultrasonic flow sensor of the present utility model;

FIG. 4 is a schematic illustration of a housing of an embodiment of an external clip-on ultrasonic flow sensor of the present utility model;

Fig. 5 is a perspective view of an embodiment of an external clip type ultrasonic flow sensor of the present utility model.

In the figure: 1. a housing; 11. a receiving chamber; 12. a connecting through hole; 13. a magnet structure; 14. a clamping groove; 2. a transmission line head; 21. a wire; 22. a cable head; 23. a cable; 3. an acoustic wedge; 31. a crystal seat; 311. a concave portion; 32. a crystal structure; 33. a crystal gland; 331. and a through hole structure.

Detailed Description

For a better understanding of the objects, technical solutions and advantages of the present utility model, reference should be made to the various exemplary embodiments described hereinafter with reference to the accompanying drawings, which form a part hereof, and in which are described various exemplary embodiments which may be employed in practicing the present utility model. The same reference numbers in different drawings identify the same or similar elements unless expressly stated otherwise. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. It is to be understood that they are merely examples of processes, methods, apparatuses, etc. that are consistent with certain aspects of the present disclosure as detailed in the appended claims, other embodiments may be utilized, or structural and functional modifications may be made to the embodiments set forth herein without departing from the scope and spirit of the present disclosure.

In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "transverse," and the like are used in an orientation or positional relationship based on that shown in the drawings, and are merely for convenience in describing the present utility model and to simplify the description, rather than to indicate or imply that the elements referred to must have a particular orientation, be constructed and operate in a particular orientation. The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The term "plurality" means two or more. The terms "connected," "coupled" and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, communicatively connected, directly connected, indirectly connected via intermediaries, or may be in communication with each other between two elements or in an interaction relationship between the two elements. The term "and/or" includes any and all combinations of one or more of the associated listed items. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In order to illustrate the technical solutions of the present utility model, the following description is made by specific embodiments, only the portions related to the embodiments of the present utility model are shown.

Embodiment one:

As shown in fig. 1 to 5, the present utility model provides an external clip type ultrasonic flow sensor, which comprises a housing 1, a transmission line head 2 and an acoustic wedge 3 installed in the housing 1; the shell 1 is provided with a containing cavity 11 and a connecting through hole 12; the acoustic wedge 3 is obliquely arranged in the shell 1 and matched with the accommodating cavity 11; the accommodating cavity 11 is communicated with the connecting through hole 12; the transmission line head 2 penetrates into the connecting through hole 12 to be connected with the acoustic wedge 3. Specifically, the utility model is based on an upper shell and a lower shell in the prior art, the shell 1 of the utility model is arranged into an integral structure, the accommodating cavity 11 is arranged on the shell 1 and is used for accommodating the inclined acoustic wedge 3, the connecting through hole 12 communicated with the accommodating cavity 11 is arranged on the shell 1, so that the transmission line head 2 can penetrate through the connecting through hole 12 and is connected with the acoustic wedge 3, the acoustic wedge 3 sends the detected sound velocity of the fluid in the pipeline to be detected to the signal processing device through the transmission line head 2, and the flow velocity of the fluid is calculated. The shape and the size of the acoustic wedge 3 and the accommodating cavity 11 are matched with each other, and when the acoustic wedge 3 is fixed in the accommodating cavity 11, the outer wall of the acoustic wedge 3 is abutted with the inner wall of the accommodating cavity 11. The receiving chamber 11 and the acoustic wedge 3 are preferably of a cylindrical configuration arranged obliquely. The acoustic wedge 3 is obliquely arranged, so that ultrasonic waves can be conveniently and obliquely emitted into fluid in a pipeline to be detected at a certain angle, and flow can be conveniently detected. This novel casing 1 through setting up an organic whole structure of use sets up on casing 1 with the sound wedge 3 mutually supporting hold chamber 11, and with hold the connecting hole 12 that chamber 11 is linked together, transmission line head 2 is directly connected with the sound wedge 3 that holds in the chamber 11 through connecting hole 12, reduces the volume of sensor, and convenient equipment can be applicable to less pipeline that awaits measuring.

As an alternative embodiment, the included angle between the central line of the accommodating cavity 11 and the vertical plane of the horizontal plane of the bottom of the shell 1 has a certain preset range; the cavity mouth of the accommodating cavity 11 is arranged at the bottom of the shell 1; the bottom of the shell 1 is abutted with a pipeline to be tested. Specifically, hold chamber 11 slope setting for hold the central line in chamber 11 and the perpendicular plane of casing 1 bottom horizontal plane's vertical plane existence certain contained angle, the contained angle is θ, and the size of contained angle can carry out the adaptability setting according to actual demand. The cavity mouth of the accommodating cavity 11 is formed in the bottom of the shell 1, the acoustic wedge 3 can be directly arranged in the shell 1 from the cavity mouth in the bottom of the shell 1, when the sensor is fixed on a pipeline to be measured, the bottom of the sensor shell 1 is directly abutted against the pipeline to be measured, the bottom of the acoustic wedge 3 is abutted against the pipeline to be measured, ultrasonic waves which are conveniently emitted can be directly injected into fluid of the pipeline to be measured, and the detection of fluid flow is conveniently realized.

As an alternative embodiment, the preset range is 24 ° 27 'to 48 ° 36'. Specifically, the included angle is preferably 24 ° 27 'to 48 ° 36', and can be adaptively set within this range. The sound wedge 3 is also obliquely arranged, and the inclination angle is the same as that of the accommodating cavity 11, so that the sound wedge 3 can be tightly fixed in the accommodating cavity 11.

As an alternative embodiment, a connecting through hole 12 is provided at a side of the housing 1, one end of which is connected to the receiving chamber 11. Specifically, the connection through hole 12 is provided on the side surface of the housing 1, and is convenient for leading out the transmission line head 2 and the transmission line from the side surface of the housing 1 for electrical connection with the signal processing device. The signal processing device can amplify and convert the ultrasonic signal received by the receiver into an electrical signal. The connecting through hole 12 can be arranged on the top surface of the shell 1 according to the requirement, so that the transmission line head 2 and the acoustic wedge 3 are ensured to be conveniently connected.

As an alternative embodiment, the housing 1 is provided with a magnet structure 13 and two clamping grooves 14; the two clamping grooves 14 are oppositely arranged at the top of the shell 1 and are used for limiting the fixing belt; the magnet structure 13 is arranged at the bottom of the housing 1. Specifically, the top of casing 1 is provided with two double-layered groove 14 that set up relatively, and the fixed band (like the steel band) can bind the sensor and fix on the pipeline that awaits measuring, and when the sensor was binded to the fixed band, fixed band and double-layered groove 14 looks butt, and double-layered groove 14 can carry out spacing fixedly to the fixed band, prevents that the sensor from the side roll-off, guarantees the fixed effect of fixed band. And the fixing belt is mutually matched with the clamping groove 14, so that the fixing belt is prevented from moving on the clamping groove 14, and the installation tightness is ensured. The bottom of the shell 1 is provided with a magnet structure 13, and the shell 1 of the sensor can directly adsorb the sensor on a pipeline to be detected through the magnet structure 13, so that the sensor is further fixed. In addition, the sensor can be further fixed by bonding the fixing glue with the pipeline to be tested.

As an alternative embodiment, the acoustic wedge 3 comprises a crystal seat 31, a crystal structure 32 and a crystal gland 33; the crystal seat 31 is provided with a recess 311 which can be used for accommodating the crystal structure 32; the crystal pressing cover 33 is matched with the concave portion 311 and fixed on the crystal seat 31. In particular, crystal holder 31 is preferably of cylindrical configuration, and is beveled at one end; the shape of the crystal seat 31 can be arbitrarily set according to actual requirements. The upper portion of the crystal seat 31 is provided with a recess 311 for accommodating the crystal structure 32, one side of the crystal structure 32 being a positive electrode and the other side being a negative electrode. The crystal pressing cover 33 is matched with the crystal seat 31, can be fixed above the crystal seat 31, and is used for covering the crystal structure 32 placed in the concave part 311.

As an alternative embodiment, the crystal gland 33 is provided with a through hole structure 331; the transmission line head 2 can be connected to the crystal structure 32 by means of a via structure 331. Specifically, a through hole structure 331 is provided in the middle of the crystal pressing cover 33, and one end of the transmission line head 2 can pass through the through hole structure 331 to be connected with the crystal structure 32, so that signals can be received or transmitted through the crystal structure 32.

As an alternative embodiment, the crystal structure 32 is a piezoelectric ceramic wafer having a resonant frequency of 1MHz + -50K or 2MHz + -100K. The speed of the ultrasonic wave transmitted by the crystal seat 31 is 2000-3000 m/s. Specifically, the crystal structure 32 is preferably a piezoelectric ceramic wafer, and the resonance frequency is 1 MHz.+ -. 50K or 2 MHz.+ -. 100K when the signal is transmitted. The propagation speed of the ultrasonic wave in the crystal seat 31 is 2000 to 3000m/s, and the material of the crystal seat 31 is preferably a material having a propagation speed of the ultrasonic wave of 2000 to 3000m/s.

As an alternative embodiment, the transmission line head 2 comprises a wire 21, a cable head 22 and a cable 23; the wire 21 is electrically connected with the cable 23 through the cable head 22; the conducting wire 21 is made of hard metal; the conductive line 21 has a bent shape and can be inserted into the via structure 331. Specifically, the wire 21, the cable head 22, and the cable 23 are sequentially connected to form the transmission line head 2. The conductive wire 21 is made of hard metal, which is conductive, and can be processed into a bent shape, so that the transmission line head 2 can be connected with the crystal structure 32 through the through hole structure 331 conveniently. The cable head 22 is matched with the connecting through hole 12, and can be inserted into the connecting through hole 12. The cable 23 is used for electrical connection with the signal processing means for transmitting signals to the signal processing means.

The embodiment is a specific example only and does not suggest one such implementation of the utility model.

The foregoing is only illustrative of the preferred embodiments of the utility model, and it will be appreciated by those skilled in the art that various changes in the features and embodiments may be made and equivalents may be substituted without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims (10)

1. An external clamping type ultrasonic flow sensor is characterized by comprising a shell (1), a transmission line head (2) and an acoustic wedge (3) arranged in the shell (1); the shell (1) is provided with a containing cavity (11) and a connecting through hole (12); the acoustic wedge (3) is obliquely arranged in the shell (1) and is matched with the accommodating cavity (11); the accommodating cavity (11) is communicated with the connecting through hole (12); the transmission line head (2) penetrates into the connecting through hole (12) to be connected with the acoustic wedge (3).

2. The external clamp type ultrasonic flow sensor according to claim 1, wherein an included angle between a central line of the accommodating cavity (11) and a vertical plane of a horizontal plane of the bottom of the shell (1) has a certain preset range; the cavity opening of the accommodating cavity (11) is arranged at the bottom of the shell (1); the bottom of the shell (1) is abutted with the pipeline to be tested.

3. The external clamp ultrasonic flow sensor of claim 2, wherein the predetermined range is 24 ° 27 'to 48 ° 36'.

4. The external clamp type ultrasonic flow sensor according to claim 1, wherein the connecting through hole (12) is provided at a side surface of the housing (1), and one end is connected with the accommodating chamber (11).

5. The external clamp type ultrasonic flow sensor according to claim 1, characterized in that a magnet structure (13) and two clamp grooves (14) are arranged on the shell (1); the two clamping grooves (14) are oppositely arranged at the top of the shell (1) and are used for limiting the fixing belt; the magnet structure (13) is arranged at the bottom of the shell (1).

6. The external clamp type ultrasonic flow sensor according to claim 1, characterized in that the acoustic wedge (3) comprises a crystal seat (31), a crystal structure (32) and a crystal gland (33); -said crystal seat (31) is provided with a recess (311) adapted to house said crystal structure (32); the crystal pressing cover (33) is matched with the concave part (311) and fixed on the crystal seat (31).

7. The external clamp type ultrasonic flow sensor according to claim 6, wherein a through hole structure (331) is arranged on the crystal gland (33); the transmission line head (2) can be connected to the crystal structure (32) by means of the via structure (331).

8. The external clamp ultrasonic flow sensor of claim 6, wherein the crystal structure (32) is a piezoelectric ceramic wafer having a resonant frequency of 1MHz ± 50K or 2MHz ± 100K.

9. The external clamp type ultrasonic flow sensor according to claim 6, wherein the speed of ultrasonic wave propagation of the crystal seat (31) is 2000-3000 m/s.

10. The external clamp type ultrasonic flow sensor according to claim 7, characterized in that the transmission line head (2) comprises a wire (21), a cable head (22) and a cable (23); the wire (21) is electrically connected with the cable (23) through the cable head (22); the conducting wire (21) is made of hard metal; the lead (21) is of a bent shape and can be inserted into the through hole structure (331).