Ultrasonic flowmeter

Abstract

The utility model discloses an ultrasonic flowmeter which comprises a measuring pipe, connecting pipes are arranged at the left end and the right end of the outer side of the measuring pipe in a penetrating mode, mounting covers are mounted at the upper ends of the connecting pipes, plug-in sensors are arranged on the top walls of the mounting covers, and the ultrasonic flowmeter further comprises a self-plugging mechanism. The self-plugging mechanism comprises annular seats, telescopic columns, springs and plugging seats, the annular seats are arranged at the lower ends of the interiors of the connecting pipes, the upper sides of the annular seats are slidably connected with the two symmetrically-distributed plugging seats, and the lower ends of the plug-in sensors penetrate through center holes of the adjacent annular seats and are located in the measuring pipe. When the sensor part of the ultrasonic flowmeter is disassembled and cleaned through the transmission element, the pipeline at the sensor mounting part can be automatically closed without closing a measuring pipeline valve, so that the sensor of the ultrasonic flowmeter is cleaned under the condition of ensuring the normal use of the measuring pipeline, and the ultrasonic flowmeter is convenient to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to ultrasonic flowmeter technical field, concretely is ultrasonic flowmeter. BACKGROUND

[0002] Ultrasonic flowmeter is a kind of flowmeter based on the principle that the propagation speed of ultrasonic wave in flowing medium is equal to the vector sum of the average flow velocity of measured medium and the speed of sound wave in stationary medium, according to the principle of signal detection, ultrasonic flowmeter can be divided into propagation speed difference method (direct time difference method, time difference method, phase difference method and frequency difference method), beam shift method, Doppler method, cross correlation method, spatial filter method and noise method, and the plug-in ultrasonic flowmeter belongs to one kind of flowmeter, part ultrasonic flowmeter is provided with two fixed pipes penetrating on the measuring pipeline, ultrasonic sensor is inserted into the two fixed pipes, and the ultrasonic sensor is fixedly connected with the corresponding fixed pipe by bolt through connecting cover, when using, control element starts ultrasonic sensor and receives its sound wave detection signal, the fluid flow rate of measuring pipeline is measured by the interference of flow rate on sound wave transmission time, the ultrasonic sensor is located inside the measuring pipeline, the ultrasonic sensor is in contact with the fluid in the measuring pipeline for a long time, and a layer of medium is easily attached to the surface of the ultrasonic sensor, in order to ensure the detection accuracy of ultrasonic sensor, ultrasonic sensor needs to be cleaned regularly, however, since the fixed pipe penetrates into the measuring pipeline, the measuring pipeline valve needs to be closed every time the ultrasonic sensor is removed, then the ultrasonic sensor is removed and cleaned, and the measuring pipeline is in closed state during the cleaning process of ultrasonic sensor, which affects the normal use of the measuring pipeline, therefore, we propose ultrasonic flowmeter. CONTENT OF THE UTILITY MODEL

[0003] The utility model solves the technical problem of overcoming the defects of the prior art, provides ultrasonic flowmeter, when the sensor part of the ultrasonic flowmeter is removed and cleaned by transmission element, the pipeline of the sensor mounting part can be automatically closed, without closing the measuring pipeline valve, so that the sensor of the ultrasonic flowmeter is cleaned under the condition of ensuring the normal use of the measuring pipeline, which is convenient to use and can effectively solve the problems in the background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: ultrasonic flowmeter, including measuring pipe, the left and right two ends of the outside of measuring pipe are provided with connecting pipe penetrating, the upper end of connecting pipe is equipped with installation cover, the top wall of installation cover is equipped with plug-in sensor, it also includes self-plugging mechanism;

[0005] The self-sealing mechanism comprises annular seats, telescopic columns, springs and sealing seats, the annular seats are arranged at the lower ends of the connecting pipes respectively, two symmetrically distributed sealing seats are slidably connected to the upper sides of the annular seats respectively, the lower ends of the plug-in sensors pass through the center holes of the adjacent annular seats and are located in the measuring pipes, two symmetrically distributed telescopic columns and springs are arranged between the sealing seat and the adjacent connecting pipe, the springs are movably sleeved with the outer ends of the adjacent telescopic columns, when the sensor part of the ultrasonic flowmeter is disassembled for cleaning, the pipeline at the sensor mounting part can be automatically sealed without closing the measuring pipeline valve, so that the sensor of the ultrasonic flowmeter is cleaned under the condition that the measuring pipeline is normally used, and the use is convenient.

[0006] Further, the outside middle part of the measuring pipe is provided with a single-chip microcomputer, the input end of the single-chip microcomputer is electrically connected with an external power supply, and the single-chip microcomputer is bidirectionally electrically connected with the plug-in sensors.

[0007] Further, the outside upper ends of the connecting pipes are provided with threaded grooves, and the inner walls of the mounting covers are threadedly connected with the adjacent threaded grooves, so that the mounting cover in the ultrasonic flowmeter is fixed with the connecting pipes.

[0008] Further, the self-sealing mechanism further comprises center cavities and center sealing seats, the center cavities are arranged in the middle parts of the sealing seats on the left sides of the annular seats, the center sealing seats are arranged in the middle parts of the sealing seats on the right sides of the annular seats, and the center sealing seats are inserted into the adjacent center cavities, so that the center sealing effect of the contact parts of the two sealing seats in the ultrasonic flowmeter is improved.

[0009] Further, the self-sealing mechanism further comprises guide rods, the guide rods are arranged on the upper sides of the sealing seats, and the guide rods are mounted in cooperation with the adjacent plug-in sensors, so that the center holes of the annular seats are exposed through the extrusion contact between the guide rods and the plug-in sensors.

[0010] Further, the self-sealing mechanism further comprises rubber sleeves, the rubber sleeves are arranged on the outer sides of the guide rods, so that the hard extrusion contact between the guide rods and the plug-in sensors in the ultrasonic flowmeter is avoided.

[0011] Further, rubber sealing rings I are arranged in grooves I formed in the upper sides of the annular seats, and rubber sealing rings II are arranged in grooves II formed in the center holes of the annular seats, so that the sealing effect between the sealing seats and the annular seats in the ultrasonic flowmeter and the sealing effect between the plug-in sensors and the center holes of the annular seats are improved.

[0012] Compared with the prior art, the ultrasonic flowmeter has the following advantages:

[0013] When the sensor part of the ultrasonic flowmeter is disassembled and cleaned through the annular seat, the telescopic column, the spring, the plugging seat, the center cavity, the center plugging seat, the guide rod and the rubber sleeve, the pipeline at the sensor mounting part can be automatically closed without closing the measuring pipeline valve, so that the sensor of the ultrasonic flowmeter is cleaned while ensuring the normal use of the measuring pipeline, and the use is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a structural schematic view of the utility model;

[0015] Fig. 2 It is a split structural schematic view of the connecting pipe and the mounting cover of the utility model;

[0016] Fig. 3 It is an enlarged structural schematic view of A of the utility model.

[0017] In the figure: 1 measuring pipe, 2 single-chip microcomputer, 3 connecting pipe, 4 mounting cover, 5 plug-in sensor, 6 self-plugging mechanism, 61 annular seat, 62 telescopic column, 63 spring, 64 plugging seat, 65 center cavity, 66 center plugging seat, 67 guide rod, 68 rubber sleeve, 7 rubber sealing ring I, 8 rubber sealing ring II. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0019] Please refer to Figs. 1-3The embodiment provides a technical scheme: an ultrasonic flowmeter, comprising a measuring pipe 1, connecting pipes 3 are arranged on the left and right sides of the outer side of the measuring pipe 1, mounting covers 4 are arranged on the upper ends of the connecting pipes 3, plug-in sensors 5 are arranged on the top walls of the mounting covers 4, a single-chip microcomputer 2 is arranged on the middle of the outer side of the measuring pipe 1, the input end of the single-chip microcomputer 2 is electrically connected with an external power supply, the single-chip microcomputer 2 is bidirectionally electrically connected with the plug-in sensors 5, threaded grooves are arranged on the outer side upper ends of the connecting pipes 3, the inner walls of the mounting covers 4 are screw-connected with adjacent threaded grooves, when the device is used to measure the flow in the measuring pipe 1, the single-chip microcomputer 2 starts two plug-in sensors 5, the plug-in sensor 5 on the left side emits a signal, the signal is received by the plug-in sensor 5 on the other side after passing through the fluid, at the same time when the plug-in sensor 5 on the left side emits a signal, the plug-in sensor 5 on the right side also emits a signal, the signal is received by the plug-in sensor 5 on the left side after passing through the fluid, due to the existence of the flow rate, the two times are not equal, there is a time difference, a transducer is arranged in the single-chip microcomputer 2, the single-chip microcomputer 2 is bidirectionally electrically connected with the plug-in sensors 5 through the transducer, the mutual conversion of the electric signal of the single-chip microcomputer 2 and the acoustic wave signal of the plug-in sensors 5 is realized through the transducer, the single-chip microcomputer 2 can obtain the flow rate according to the time difference, and then the flow value of the fluid in the measuring pipe 1 is obtained, and the self-sealing mechanism 6 is further arranged.

[0020] The self-blocking mechanism 6 comprises annular seats 61, telescopic columns 62, springs 63 and blocking seats 64, the annular seats 61 are arranged at the lower ends of the connecting pipes 3 respectively, the upper sides of the annular seats 61 are slidably connected with two symmetrically distributed blocking seats 64 respectively, the lower ends of the plug-in sensors 5 pass through the center holes of the adjacent annular seats 61 and are located in the measuring pipes 1, the blocking seats 64 and the adjacent connecting pipes 3 are provided with two symmetrically distributed telescopic columns 62 and springs 63 respectively, the springs 63 are movably sleeved with the outer ends of the adjacent telescopic columns 62, the self-blocking mechanism 6 further comprises center cavities 65 and center blocking seats 66, the center cavities 65 are arranged in the middle portions of the blocking seats 64 on the left sides of the annular seats 61 respectively, the middle portions of the blocking seats 64 on the right sides of the annular seats 61 are provided with the center blocking seats 66 respectively, the center blocking seats 66 are inserted with the adjacent center cavities 65, the self-blocking mechanism 6 further comprises guide rods 67, the guide rods 67 are arranged on the upper sides of the blocking seats 64 respectively, the guide rods 67 are cooperatively arranged with the adjacent plug-in sensors 5, the self-blocking mechanism 6 further comprises rubber sleeves 68, the rubber sleeves 68 are arranged on the outer sides of the guide rods 67 respectively, rubber sealing rings I 7 are arranged in the grooves I on the upper sides of the annular seats 61 respectively, rubber sealing rings II 8 are arranged in the grooves II in the center holes of the annular seats 61 respectively, the springs 63 are always in the contracted state, when the plug-in sensors 5 of the ultrasonic flowmeter are installed, the staff members sleeve the mounting covers 4 to the outer upper ends of the connecting pipes 3, then rotate the mounting covers 4, the mounting covers 4 are connected with the telescopic columns 62 through the threads in the thread grooves, thereby driving the plug-in sensors 5 to move vertically downwards, in the process of moving downwards, the outer lower ends of the plug-in sensors 5 contact with the guide rods 67, after the guide rods 67 are extruded, the pressure overcomes the compression elasticity of the springs 63, thereby making the two adjacent blocking seats 64 separate from each other, the center blocking seats 66 are away from the adjacent center cavities 65, the telescopic ends of the telescopic columns 62 and the springs 63 are contracted, thereby making the center holes of the annular seats 61 exposed, with the continuous moving downwards of the plug-in sensors 5, the lower ends of the plug-in sensors 5 pass through the connecting pipes 3 and enter the measuring pipes 1, through the rubber sealing rings I 7, the contact gap between the plug-in sensors 5 and the center holes of the annular seats 61 is reduced, thereby realizing the installation of the plug-in sensors 5, through the rubber sleeves 68, the plug-in sensors 5 and the guide rods 67 are extruded flexibly, thereby avoiding the damage of the plug-in sensors 5 caused by the hard extrusion, after the ultrasonic flowmeter is used for a period of time, when the plug-in sensors 5 are disassembled and cleaned, the staff members rotate the mounting covers 4 reversely, through the same principle, the plug-in sensors 5 are drawn out of the connecting pipes 3, through the compression elasticity of the springs 63, the two adjacent blocking seats 64 are close to each other, thereby automatically blocking the center holes of the annular seats 61, through the close insertion of the center blocking seats 66 and the adjacent center cavities 65, the center sealing effect of the contact portions of the two blocking seats 64 is improved, through the rubber sealing rings II 8, the sealing effect between the blocking seats 64 and the annular seats 61 is improved.When the insertion type sensor 5 of the insertion type ultrasonic flowmeter is separated from the device itself, the connecting pipe 3 itself can automatically be closed. When the device removes and cleans the sensor part of the ultrasonic flowmeter through a transmission element, the pipe at the sensor mounting part can automatically be closed for work, without the need to close the measuring pipe valve, so as to clean the sensor of the ultrasonic flowmeter while ensuring the normal use of the measuring pipe, and the use is convenient.

[0021] The working principle of the ultrasonic flowmeter is as follows: the spring 63 is always in a contracted state, when the plug-in sensor 5 of the ultrasonic flowmeter is installed, the staff sets the installation cover 4 to the outer side of the upper end of the connecting pipe 3, then rotates the installation cover 4, the installation cover 4 is connected through the thread between the thread groove, so as to drive the plug-in sensor 5 of the installation cover 4 to move vertically downward, in the process of the plug-in sensor 5 moving downward, the outer side of the lower end of the plug-in sensor 5 is in contact with the guide rod 67, after the guide rod 67 is extruded, the pressure overcomes the compression force of the spring 63, so that the two adjacent blocking seats 64 are separated from each other, the center blocking seat 66 is away from the adjacent center cavity 65, the telescopic end of the telescopic column 62 and the spring 63 are contracted, so that the center hole of the annular seat 61 is exposed, with the continuous downward movement of the plug-in sensor 5, the lower end of the plug-in sensor 5 passes through the connecting pipe 3 and enters the measuring pipe 1, through the rubber sealing ring one 7, so as to reduce the contact gap between the plug-in sensor 5 and the center hole of the annular seat 61, realize the installation work of the plug-in sensor 5, through the rubber sleeve 68, the plug-in sensor 5 and the guide rod 67 are in flexible extrusion contact, so as to avoid the damage of the plug-in sensor 5 caused by hard extrusion, when the device is used to measure the flow in the measuring pipe 1, the single-chip microcomputer 2 starts two plug-in sensors 5, the plug-in sensor 5 on the left side emits a signal, the signal passes through the fluid and is received by the plug-in sensor 5 on the other side, at the same time when the plug-in sensor 5 on the left side emits a signal, the plug-in sensor 5 on the right side also emits the same signal, after passing through the fluid, it is received by the plug-in sensor 5 on the left side, due to the existence of flow rate, the two times are not equal, there is a time difference, the single-chip microcomputer 2 is internally provided with a transducer, the single-chip microcomputer 2 is bidirectionally electrically connected with the plug-in sensor 5 through the transducer, the mutual conversion of the electric signal of the single-chip microcomputer 2 and the acoustic wave signal of the plug-in sensor 5 is realized through the transducer, the single-chip microcomputer 2 can obtain the flow rate according to the time difference, and then the flow value of the fluid in the measuring pipe 1 is obtained, after the ultrasonic flowmeter is used for a period of time, when the plug-in sensor 5 is disassembled and cleaned, the staff reversely rotates the installation cover 4, the plug-in sensor 5 is pulled out from the connecting pipe 3 through the same principle, through the compression force of the spring 63, the two adjacent blocking seats 64 are close to each other, so as to automatically block the center hole of the annular seat 61, the center blocking seat 66 is in close contact with the adjacent center cavity 65, so as to improve the center sealing effect of the contact part of the two blocking seats 64, the sealing effect between the blocking seat 64 and the annular seat 61 is improved through the rubber sealing ring two 8, when the plug-in sensor 5 of the plug-in ultrasonic flowmeter is separated from the device itself, the connecting pipe 3 can be automatically closed.

[0022] It is worth noting that the single-chip microcomputer 2 disclosed in the above embodiment can adopt STM32, the plug-in sensor 5 can adopt GE ultrasonic probe H5KL50, and the single-chip microcomputer 2 controls the plug-in sensor 5 to work by using the method commonly used in the prior art.

[0023] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which are made by using the content of the present application specification and drawings, are also included in the patent protection scope of the present application.

Claims

1. An ultrasonic flow meter, comprising a measuring tube (1), wherein connecting tubes (3) are provided through both the left and right ends of the measuring tube (1), and mounting caps (4) are installed on the upper ends of the connecting tubes (3), and insertion sensors (5) are provided on the top walls of the mounting caps (4), characterized in that: It also includes a self-sealing mechanism (6); The self-sealing mechanism (6) comprises an annular seat (61), an extension column (62), a spring (63) and a sealing seat (64), the annular seat (61) is arranged at the lower end of the connecting pipe (3), the upper side of the annular seat (61) is slidably connected with two symmetrically distributed sealing seats (64), the lower end of the plug-in sensor (5) passes through the center hole of the adjacent annular seat (61) and is located in the measuring pipe (1), the sealing seat (64) and the adjacent connecting pipe (3) are provided with two symmetrically distributed extension columns (62) and springs (63), and the spring (63) is movably sleeved with the outer end of the adjacent extension column (62).

2. The ultrasonic flow meter of claim 1, wherein: The outer middle part of the measuring pipe (1) is provided with a single-chip microcomputer (2), the input end of the single-chip microcomputer (2) is electrically connected with an external power supply, and the single-chip microcomputer (2) is bidirectionally electrically connected with the plug-in sensor (5).

3. The ultrasonic flow meter of claim 1, wherein: The outer side of the connecting pipe (3) is provided with a threaded groove, and the inner wall of the mounting cover (4) is screwed with the adjacent threaded groove.

4. The ultrasonic flow meter of claim 1, wherein: The self-sealing mechanism (6) further comprises a center cavity (65) and a center sealing seat (66), the center cavity (65) is arranged in the middle part of the sealing seat (64) on the left side of the annular seat (61), and the center sealing seat (66) is arranged in the middle part of the sealing seat (64) on the right side of the annular seat (61), and the center sealing seat (66) is inserted into the adjacent center cavity (65).

5. The ultrasonic flow meter of claim 1, wherein: The self-sealing mechanism (6) further comprises a guide rod (67), the guide rod (67) is arranged on the upper side of the sealing seat (64), and the guide rod (67) is matched with the adjacent plug-in sensor (5).

6. The ultrasonic flow meter of claim 5, wherein: The self-sealing mechanism (6) further comprises a rubber sleeve (68), the rubber sleeve (68) is arranged on the outer side of the guide rod (67).

7. The ultrasonic flow meter of claim 1, wherein: The upper side of the annular seat (61) is provided with a groove one, and the groove one is provided with a rubber sealing ring one (7), and the center hole of the annular seat (61) is provided with a groove two, and the groove two is provided with a rubber sealing ring two (8).

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