Ultrasonic probe assembly and ultrasonic instrument

Abstract

The utility model provides an ultrasonic probe assembly and an ultrasonic instrument, and relates to the technical field of fluid metering devices. The shell is internally provided with a containing space and an ultrasonic signal propagation hole communicating the containing space with the exterior of the shell, the ultrasonic signal propagation hole is used for being communicated with the interior of a to-be-measured pipe, the ultrasonic probe is located in the containing space, one end of the ultrasonic probe is an ultrasonic transmitting surface, and the ultrasonic transmitting surface right faces the ultrasonic signal propagation hole; ultrasonic waves emitted by the ultrasonic probe can be emitted from the ultrasonic signal propagation hole, and / or ultrasonic waves emitted into the accommodating space through the ultrasonic signal propagation hole can be received by the ultrasonic probe; the shell is further provided with a drainage through hole which is located in the lower surface of the shell and communicates with the containing space and the outside of the shell. The drainage through hole is used for draining at least part of water entering the containing space in the shell. The method has the effect of reducing the influence of water vapor, rainwater and the like on the detection precision of the ultrasonic probe assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid metering device technical field especially relates to an ultrasonic transducer assembly and ultrasonic instrument. BACKGROUND

[0002] Flue gas flow is an important parameter of fixed pollution source flue gas emission continuous monitoring system CEMS, since ultrasonic gas flowmeter has higher accuracy, low flow rate lower limit and the like, overall measurement precision is higher, therefore, application is more and more extensive on flue gas flow measurement.

[0003] The Chinese patent with publication number CN221238438U discloses a through-type ultrasonic flue gas flowmeter, which comprises a shell and an ultrasonic transducer inside the shell, the shell is communicated with a flue, a sweeping air inlet is arranged on the side surface of the shell, sweeping air can be introduced into the shell through the sweeping air inlet, which effectively reduces the influence of high-temperature gas, dust and the like in the flue on the ultrasonic transducer, and can also form a complete air protection layer on the surface of the ultrasonic transducer to avoid dust adsorption on the surface of the ultrasonic transducer.

[0004] However, when the ultrasonic gas flowmeter is applied to, for example, a ship to monitor pollution source flue gas emission, there will be a large amount of water vapor in the flue gas pipeline of the ship (more water vapor in the air at sea), in addition, the water content in the pipeline will increase when it rains (rainwater flows into the pipeline), thus, when the water vapor and rainwater flow into the shell of the ultrasonic gas flowmeter through the inner wall of the pipeline, the ultrasonic transducer is soaked in water, which will affect the transmission of ultrasonic signals by the ultrasonic transducer, and then affect the accuracy of the ultrasonic gas flowmeter. UTILITY MODEL CONTENTS

[0005] In order to improve the above problems, the present application provides an ultrasonic transducer assembly and an ultrasonic instrument.

[0006] On the one hand, the present application provides an ultrasonic transducer assembly, which adopts the following technical scheme:

[0007] It comprises a shell and an ultrasonic transducer; the shell has an accommodation space inside and an ultrasonic signal propagation hole communicating the accommodation space with the outside of the shell, the ultrasonic signal propagation hole is used to communicate with the inside of a pipeline to be measured; the ultrasonic transducer is located in the accommodation space, one end of the ultrasonic transducer is an ultrasonic wave emitting surface, and the ultrasonic wave emitting surface is arranged opposite to the ultrasonic signal propagation hole, so that the ultrasonic waves emitted by the ultrasonic transducer can be emitted out of the ultrasonic signal propagation hole, and / or the ultrasonic waves entering the accommodation space through the ultrasonic signal propagation hole can be received by the ultrasonic transducer; the shell further has a drainage through hole located at the lower surface thereof and communicating the accommodation space with the outside of the shell, the drainage through hole is used to drain at least part of the water entering the accommodation space inside the shell.

[0008] In another aspect, the present application provides an ultrasonic meter comprising the ultrasonic probe assembly as described above.

[0009] In summary, the present application has the beneficial effect that the water vapor and rainwater in the pipeline to be measured can be discharged through the drainage through hole in the bottom surface of the shell after entering the interior of the shell from the ultrasonic signal propagation hole, reducing the water accumulation in the interior of the shell, thereby reducing the influence of the water accumulation on the ultrasonic probe. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a structural schematic diagram of the ultrasonic probe assembly as a whole according to Embodiment 1 of the present application;

[0011] Figure 2 is a sectional view of the interior of the ultrasonic probe assembly according to Embodiment 1 of the present application;

[0012] Figure 3 is an exploded view of the structure of the ultrasonic probe assembly according to Embodiment 1 of the present application;

[0013] Figure 4 is a schematic diagram of the specific structure of the drainage head according to Embodiment 1 of the present application;

[0014] Figure 5 is a structural schematic diagram of the water blocking block according to Embodiment 1 of the present application

[0015] Figure 6 is a sectional view of the interior structure of the pre-buried flange according to Embodiment 1 of the present application.

[0016] Reference signs: 1, shell; 11, ultrasonic signal propagation hole; 12, first drainage hole; 13, second drainage hole; 14, mounting seat; 15, drainage pipe; 16, mounting shell; 17, closing flange; 18, quick release flange; 181, quick release clamp; 19, pre-buried flange; 2, ultrasonic probe; 21, ultrasonic wave emitting surface; 3, water blocking block; 31, water guiding surface; 4, first region; 5, second region; 6, third region; 7, drainage head; 71, water guiding channel; 72, water guiding through hole; 8, ultrasonic probe assembly; 81, temperature measurement sensor; 82, pressure tapping hole. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application in conjunction with the drawings. The following introduces a relatively preferred one of the multiple possible embodiments of the present application, which is intended to provide a basic understanding of the present application, but is not intended to identify the key or decisive elements or limit the scope of protection.

[0018] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0019] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and devices can be considered part of the present disclosure.

[0020] In the description of the present application, it should be noted that the circuits and electronic components and modules involved in the present application are all prior art, which can be implemented by those skilled in the art without further description, and the content protected by the present application does not involve improvement of internal structure and method.

[0021] Further need to be explained is that unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] Embodiment 1:

[0023] Embodiment 1 of the present application provides an ultrasonic probe assembly, referring to Figures 1 to 3 The ultrasonic probe assembly comprises

[0024] The shell 1 and the ultrasonic probe 2;

[0025] The shell 1 has an accommodating space inside and an ultrasonic signal propagation hole 11 communicating the accommodating space with the outside of the shell 1, the ultrasonic signal propagation hole 11 being used for communicating with the inside of the pipeline to be measured;

[0026] The ultrasonic probe 2 is located in the accommodating space, one end of the ultrasonic probe 2 being an ultrasonic wave emitting surface 21, and the ultrasonic wave emitting surface 21 being arranged opposite to the ultrasonic signal propagation hole 11, so that the ultrasonic wave emitted by the ultrasonic probe 2 can be emitted out of the ultrasonic signal propagation hole 11, and / or the ultrasonic wave entering the accommodating space via the ultrasonic signal propagation hole 11 can be received by the ultrasonic probe 2;

[0027] The shell 1 further has a drainage through hole located at the lower surface thereof and communicating the accommodating space with the outside of the shell 1, the drainage through hole being used for draining at least part of the water entering the accommodating space inside the shell 1.

[0028] The shell 1 refers to the protective shell of the entire ultrasonic probe assembly 8, which is used to wrap the ultrasonic probe 2 inside to provide protection for the ultrasonic probe 2 and prevent external objects from colliding with the ultrasonic probe 2 to cause damage. The accommodation space refers to the cavity accommodating the ultrasonic probe 2, and the ultrasonic wave emitting surface 21 refers to the end surface of the ultrasonic probe 2 for emitting and receiving ultrasonic waves.

[0029] The ultrasonic probe 2 has an ultrasonic wave emitting surface 21 at one end facing the ultrasonic signal propagation hole 11, and the ultrasonic signal propagation hole 11 is formed at one end of the shell 1. The shell 1 is in communication with the inside of the pipeline to be measured through the ultrasonic signal propagation hole 11, and the ultrasonic probe 2 can perform ultrasonic wave emission or reception through the ultrasonic wave emitting surface 21 at one end, so that the ultrasonic probe 2 can detect the fluid in the pipeline to be measured. The flowing water or condensate in the pipeline to be measured enters the inside of the shell 1 from the ultrasonic signal propagation hole 11 and can be discharged through the drain through hole at the bottom of the shell 1, thereby reducing the water accumulation in the shell 1 and reducing the influence of water accumulation on the function of the ultrasonic probe 2.

[0030] The shell 1 can have a cylindrical or columnar shape, or can also have a cuboid shape, which can protect the ultrasonic probe 2 and make the ultrasonic probe 2 convenient for transmitting and receiving ultrasonic signals.

[0031] It should be noted that the ultrasonic probe assembly 8 disclosed in Embodiment 1 of the present application provides a solution, which is not limited to measuring the flue gas pipeline of the ship, but also can be used for detecting different fluids in different pipelines in other fields, and is not limited to measuring the flow, but also can be used for measuring the gas concentration and the like.

[0032] Further, the drain through hole includes a first drain hole 12 and a second drain hole 13, and the first drain hole 12 and the second drain hole 13 are sequentially and spaced apart in the direction of the ultrasonic wave emitting surface 21 pointing to the ultrasonic signal propagation hole 11.

[0033] The first drain hole 12 and the second drain hole 13 are both through holes penetrating the shell 1, and the direction of the ultrasonic wave emitting surface 21 pointing to the ultrasonic signal propagation hole 11 is defined as the first direction (hereinafter referred to as the first direction), and in the first direction, the first drain hole 12 and the second drain hole 13 are sequentially and spaced apart, so that the water entering the inside of the shell 1 can be drained twice when flowing through the first drain hole 12 and the second drain hole 13, so that the water in the inside of the shell 1 can be discharged as much as possible.

[0034] Further, in the first direction, the first drain hole 12 and the ultrasonic probe 2 are sequentially and spaced apart;

[0035] And / or, in the first direction, the ultrasonic probe 2 and the second drain hole 13 are sequentially and spaced apart.

[0036] The first drainage hole 12 and the second drainage hole 13 are distributed along the first direction, and the first drainage hole 12 and the second drainage hole 13 are both arranged away from the ultrasonic probe 2, so that the water entering the shell 1 is drained at both ends of the ultrasonic probe 2, and the water is not accumulated at the position of the ultrasonic probe 2 during the drainage, further reducing the influence of the accumulated water on the ultrasonic probe 2.

[0037] In the first direction in the embodiment 1 of the present application, it can be understood that it is approximately along this direction, and it is not strictly required that the first drainage hole 12 and the second drainage hole 13 are arranged in the first direction, for example, in a direction having an included angle of 0-90° with the direction, which can be described as “in the first direction” or “along the first direction”.

[0038] Further, the ultrasonic probe assembly 8 further comprises a water blocking block 3 arranged in the accommodation space;

[0039] In the first direction, the ultrasonic probe 2, the water blocking block 3, and the second drainage hole 13 are arranged in sequence.

[0040] The side surface of the water blocking block 3 away from the ultrasonic probe 2 is a slope or a slope-like surface, the bottom end of the slope or the slope-like surface is between the second drainage hole 13 and the top end of the slope or the slope-like surface, the top end of the slope or the slope-like surface is between the ultrasonic probe 2 and the bottom end of the slope or the slope-like surface, and the height of the bottom end of the slope or the slope-like surface in the gravity direction is lower than that of the top end of the slope or the slope-like surface.

[0041] In this way, the slope or the slope-like surface of the water blocking block 3 away from the ultrasonic probe 2 is a water guide surface 31, which can be a slope or a slope-like surface. The slope-like surface can be an arc surface, a wavy surface, or other incomplete inclined surfaces, as long as the water guide surface 31 is an inclined wall surface as a whole.

[0042] The water guide surface 31 is located between the second drainage hole 13 and the ultrasonic probe 2, and in the gravity direction, the height of the bottom end of the water guide surface 31 is lower than that of the top end of the water guide surface 31. After the flowing water or the condensed water enters the shell 1 from the ultrasonic signal propagation hole 11, it is first drained from the second drainage hole 13, and part of the water that is not drained is blocked by the water blocking block 3, thereby reducing the flowing water or the condensed water entering the shell 1; and the water guide surface 31 is an inclined surface as a whole, which can further guide the flowing water or the condensed water to be drained from the second drainage hole 13, thereby improving the drainage effect of the second drainage hole 13.

[0043] Further, in the first direction, the accommodation space is divided into a first region 4, a second region 5 for placing the ultrasonic probe 2, and a third region 6 in which the wall surface is provided with the ultrasonic signal propagation hole 11.

[0044] The height of the first region 4 in the gravity direction is at least partially lower than that of the ultrasonic probe 2.

[0045] The first region 4, the second region 5 and the third region 6 are all cavity regions inside the shell 1.

[0046] In the embodiment 1 of the present application, the ultrasonic probe assembly 8 is installed in an inclined state as a whole during use, and the height of the first drain hole 12 in the gravity direction is lower than that of the second drain hole 13, so that the first region 4 is at least partially lower than the ultrasonic probe 2 in the height in the gravity direction.

[0047] Since the first region 4 is at least partially lower than the ultrasonic probe 2 in the height in the gravity direction, the flowing water or condensed water entering the inside of the shell 1 will gather into the first region 4 under the action of gravity, thereby reducing the time for the flowing water or condensed water to stay in the second region 5 accommodating the ultrasonic probe 2 and reducing the influence of the accumulated water on the ultrasonic probe 2.

[0048] In the embodiment 1 of the present application, the mounting seat 14 is fixed to the end of the shell 1 in the first region 4, the mounting seat 14 is distributed along the inner wall of the shell 1 in a circumferential direction, one end of the mounting seat 14 is fixed to the end of the ultrasonic probe 2, and the other end is fixed to the inner wall of the end of the shell 1, so as to separate the first region 4 between the end of the ultrasonic probe 2 and the end of the shell 1.

[0049] Further, the first drain hole 12 is arranged in the first region 4 at a position lower than the ultrasonic probe 2 in the height in the gravity direction.

[0050] In the gravity direction, the first drain hole 12 is arranged in the first region 4 at a position lower than the ultrasonic probe 2 in the height, so that the water entering the inside of the shell 1 can be smoothly drained from the first drain hole 12 by relying on its own gravity, and the influence of the water on the ultrasonic probe 2 is avoided.

[0051] Further, referring to Figure 2 and Figure 4 the drain head 7 is detachably connected in the first drain hole 12, one end of the drain head 7 is inserted into the shell 1, the other end extends out of the inside of the shell 1, a water guide channel 71 is arranged in the drain head 7 along the axial direction of the drain head 7, and a plurality of water guide through holes 72 are arranged on the side wall of the end of the drain head 7 in the shell 1 in a circumferential direction.

[0052] The detachable connection of the drain head 7 to the first drain hole 12 can be screw connection or clamping, so that the drain head 7 can be easily disassembled and assembled. In the embodiment 1 of the present application, the detachable connection of the drain head 7 is clamping. In other embodiments, the drain head 7 can be welded and fixed in the first drain hole 12.

[0053] The plurality of water guide through holes 72 on the drain head 7 are in communication with the first area 4, and the water guide through holes 72 are in communication with the water guide channel 71, so that the water inside the shell 1 can finally flow out of the shell 1 through the water guide through holes 72 and the water guide channel 71.

[0054] When the amount of water required to be drained inside the shell 1 is not large, the drain head 7 can be replaced by a plug, the first drain hole 12 is closed by the plug, or the first drain hole 12 is not directly opened. The specific situation can be determined according to the water accumulation inside the shell 1 during the actual use of the ultrasonic probe assembly 8.

[0055] Further, the drain pipe 15 is also included, one end of the drain pipe 15 is in communication with the water guide through hole, and the other end is used to communicate with the inside of the pipeline to be measured.

[0056] Specifically, in the embodiment, the water guide through hole is the first drain hole 12 and the second drain hole 13, and the drain pipe 15 can be provided with two drain pipes, one end of one drain pipe 15 is in communication with the first drain hole 12, and the other end is in communication with the inside of the pipeline to be measured; one end of the other drain pipe 15 is in communication with the second drain hole 13, and the other end is also in communication with the inside of the pipeline to be measured. The flowing water or condensed water flows into the pipeline to be measured through the drain pipe 15, and at the same time, the shell 1 and the drain pipe 15 are consistent with the internal pressure of the pipeline to be measured, so as to reduce the gas flow rate in the drain pipe 15 and improve the measurement accuracy.

[0057] The drain pipe 15 can be a soft rubber pipe or a hard PVC pipe, as long as it can communicate the water guide through hole with the pipeline to be measured.

[0058] Further, referring to Figure 2 , along the first direction, the inner diameter of the shell 1 gradually increases and presents a flared shape.

[0059] In the area from the ultrasonic emission surface 21 to the ultrasonic signal propagation hole 11, the inner diameter of the shell 1 gradually increases and presents a flared shape, so that the ultrasonic emission surface 21 can effectively avoid being blocked by the shell 1 when transmitting or receiving ultrasonic signals. The flared structure can also diffuse the signal when transmitting, and can also converge the signal when receiving.

[0060] Further, referring to Figure 2 and Figure 3 , along the first direction, the shell 1 includes the mounting shell 16, the closed flange 17, the quick-release flange 18 and the embedded flange 19 in sequence, the ultrasonic probe 2 is located in the mounting shell 16, the ultrasonic signal propagation hole 11 is arranged at the end of the embedded flange 19 away from the mounting shell 16, the inner diameter of the closed flange 17 close to the end of the embedded flange 19 is equal to or greater than the outer diameter of the ultrasonic probe, and the inner diameter of the embedded flange 19 is greater than that of the closed flange 17.

[0061] Specifically, the inner diameter of the closing flange 17 near the one end of the embedded flange 19 is equal to or greater than the outer diameter of the ultrasonic probe, and the inner diameter of the embedded flange 19 is greater than that of the closing flange 17, so that the inner diameter of the shell 1 gradually increases in the area from the ultrasonic emission surface 21 to the ultrasonic signal propagation hole 11, thereby realizing the flared structure of the shell 1, which helps the ultrasonic probe 2 to transmit and receive signals, and also reduces the difficulty of installing the ultrasonic probe assembly 8 on site. At the same time, the closing flange 17 and the quick-release flange 18 are arranged between the ultrasonic emission surface 21 and the second drainage hole 13, which can prolong the distance between the ultrasonic emission surface 21 and the second drainage hole 13, and reduce the reflection of ultrasonic signals from the drain pipe 15 back into the shell 1.

[0062] In the embodiment 1 of the present application, the inner diameter of the closing flange 17 near the one end of the embedded flange 19 is equal to or greater than the outer diameter of the ultrasonic probe, and the inner diameter of the embedded flange 19 is greater than that of the closing flange 17, so that the inner diameter of the shell 1 gradually increases in the area from the ultrasonic emission surface 21 to the ultrasonic signal propagation hole 11, thereby realizing the flared structure of the shell 1, which helps the ultrasonic probe 2 to transmit and receive signals, and also reduces the difficulty of installing the ultrasonic probe assembly 8 on site. At the same time, the closing flange 17 and the quick-release flange 18 are arranged between the ultrasonic emission surface 21 and the second drainage hole 13, which can prolong the distance between the ultrasonic emission surface 21 and the second drainage hole 13, and reduce the reflection of ultrasonic signals from the drain pipe 15 back into the shell 1.

[0063] Specifically, referring to Figure 5 and Figure 6 , the water blocking block 3 is arranged in the embedded flange 19 away from the ultrasonic signal propagation hole 11, and the water blocking block 3 can be integrally formed with the embedded flange 19. The side wall of the water blocking block 3 opposite to the water guide surface 31 is flush with the end face of the embedded flange 19, the bottom end of the water guide surface 31 is close to the second drainage hole 13, the water blocking block 3 extends along the circumference of the inner wall of the embedded flange 19 and covers the lower half of the inner wall of the embedded flange 19. In other embodiments of the present application, the length of the water blocking block 3 can be extended or shortened as needed.

[0064] The implementation principle of the ultrasonic probe assembly in the embodiment 1 of the present application is that the first drainage hole 12 and the second drainage hole 13 are arranged on the shell 1 to drain the water accumulated in the shell 1. The water blocking block 3 not only effectively blocks the flowing water or condensed water from entering the space containing the ultrasonic probe 2, but also helps to guide the flowing water or condensed water to flow out of the shell 1 through the second drainage hole 13, thereby improving the drainage effect of the shell 1.

[0065] Embodiment 2:

[0066] Embodiment 2 of the present application provides an ultrasonic meter, referring to Figure 1 The ultrasonic flowmeter comprises the ultrasonic probe assembly 8 as described above.

[0067] Further, the ultrasonic probe assembly 8 is a first ultrasonic probe assembly, and the ultrasonic meter further comprises a second ultrasonic probe assembly, the first ultrasonic probe assembly and the second ultrasonic probe assembly are used for measuring a to-be-measured pipe arranged along a gravity direction or a direction with an angle of 0-90° with the gravity direction.

[0068] Specifically, the ultrasonic flowmeter further comprises a temperature measuring sensor 81, the temperature measuring sensor 81 is arranged in the embedded flange 19 and is used for detecting a real-time temperature in the to-be-measured pipe. In this embodiment, the first ultrasonic probe assembly and the second ultrasonic probe assembly are different in structure, the second ultrasonic probe assembly is not provided with the drainage through hole, and is not provided with the drainage head 7 and the drainage pipe 15, and the rest of the structure is the same as that of the first flowmeter.

[0069] The fast-disassembly flange 18 is provided with a pressure tapping hole 82 on an end face close to the closed flange 17, the pressure tapping hole 82 is detachably connected to the fast-disassembly flange 18 and is in communication with an internal cavity (i.e. the third region 6) of the embedded flange 19. The pressure tapping hole 82 can be used for connecting a pressure gauge and other pressure measuring devices, so that a worker can detect a pressure value in the to-be-measured pipe in real time through the pressure tapping hole 82.

[0070] In use, the to-be-measured pipe can extend along the gravity direction or extend along a direction with an angle of 0-90° with the gravity direction according to actual conditions. The first ultrasonic probe assembly and the second ultrasonic probe assembly are installed on an outer wall of the to-be-measured pipe together.

[0071] In the case of no conflict, the above-described embodiments and features in the embodiments can be combined with each other.

[0072] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An ultrasonic probe assembly, characterized in that: include Housing and ultrasonic probe; The housing has an internal accommodating space and an ultrasonic signal propagation hole connecting the accommodating space to the outside of the housing. The ultrasonic signal propagation hole is used to communicate with the inside of the pipe to be measured. The ultrasonic probe is located within the receiving space. One end of the ultrasonic probe is an ultrasonic emitting surface, and the ultrasonic emitting surface is positioned directly opposite the ultrasonic signal propagation hole, so that the ultrasonic waves emitted by the ultrasonic probe can be emitted out through the ultrasonic signal propagation hole, and / or the ultrasonic waves that enter the receiving space through the ultrasonic signal propagation hole can be received by the ultrasonic probe. The housing also has a drainage hole located on its lower surface and communicating the receiving space with the outside of the housing, the drainage hole being used to drain at least a portion of the water that enters the receiving space inside the housing.

2. The ultrasonic probe assembly as described in claim 1, characterized in that: The drainage through hole includes a first drainage hole and a second drainage hole, which are arranged at intervals along the direction from the ultrasonic emitting surface to the ultrasonic signal propagation hole.

3. The ultrasonic probe assembly as described in claim 2, characterized in that: In the direction from the ultrasonic emitting surface to the ultrasonic signal propagation hole, the first drainage hole and the ultrasonic probe are arranged at intervals. And / or, in the direction from which the ultrasonic emitting surface points to the ultrasonic signal propagation hole, the ultrasonic probe and the second drainage hole are arranged sequentially at intervals.

4. The ultrasonic probe assembly as described in claim 3, characterized in that: It also includes a water-blocking block disposed within the containment space; The ultrasonic probe, the water-blocking block, and the second drain hole are arranged sequentially in the direction from the ultrasonic emitting surface to the ultrasonic signal propagation hole. The side of the water-blocking block away from the ultrasonic probe is an inclined plane or a similar inclined plane. The bottom end of the inclined plane or similar inclined plane is located between the second drain hole and the top end of the inclined plane or similar inclined plane. The top end of the inclined plane or similar inclined plane is located between the ultrasonic probe and the bottom end of the inclined plane or similar inclined plane. The height of the bottom end of the inclined plane or similar inclined plane in the direction of gravity is lower than that of the top end of the inclined plane or similar inclined plane.

5. The ultrasonic probe assembly as described in any one of claims 1-3, characterized in that: In the direction from the ultrasonic emitting surface to the ultrasonic signal propagation hole, the accommodating space is divided into a first region, a second region for placing the ultrasonic probe, and a third region with the ultrasonic signal propagation hole on the wall. The first region is at least partially lower than the height of the ultrasonic probe in the direction of gravity.

6. The ultrasonic probe assembly as described in claim 5, characterized in that: The first drainage hole is located in the first region at a height lower than that of the ultrasonic probe in the direction of gravity.

7. The ultrasonic probe assembly as described in claims 2, 3, and 6, characterized in that: A drain head is connected to the first drain hole. One end of the drain head is inserted into the housing, and the other end extends out of the housing. A water channel is opened through the drain head along its own axis. Water through holes are opened circumferentially at intervals on the side wall of the drain head at one end inside the housing. The drain head is detachably mounted on the first drain hole.

8. The ultrasonic probe assembly as claimed in claim 1, characterized in that: It also includes a drain pipe, one end of which is connected to a drain hole, and the other end is used to connect to the inside of the pipe to be measured.

9. The ultrasonic probe assembly as claimed in claim 1, characterized in that: Along the direction from the ultrasonic emitting surface to the ultrasonic signal propagation hole, the inner diameter of the housing gradually increases at least in part between the ultrasonic emitting surface and the ultrasonic signal propagation hole, forming a flared shape; Along the direction from the ultrasonic emitting surface to the ultrasonic signal propagation hole, the housing sequentially includes a mounting shell, a closing flange, a quick-release flange, and a pre-embedded flange. The ultrasonic probe is located inside the mounting shell. The ultrasonic signal propagation hole is located at the end of the pre-embedded flange away from the mounting shell. The inner diameter of the closing flange near the pre-embedded flange is equal to or greater than the outer diameter of the ultrasonic detector. The inner diameter of the pre-embedded flange is greater than the inner diameter of the closing flange.

10. An ultrasonic instrument, comprising an ultrasonic probe assembly as described in any one of claims 1-9, characterized in that: The ultrasonic probe assembly as described in any one of claims 1-9 is a first ultrasonic probe assembly; the ultrasonic instrument further includes a second ultrasonic probe assembly; the first ultrasonic probe assembly and the second ultrasonic probe assembly are used to measure a tube to be measured arranged along the direction of gravity or at an angle of 0-90° to the direction of gravity, the first ultrasonic probe assembly and the second ultrasonic probe assembly are arranged in a counter-beam pattern and are disposed on the tube to be measured; the height of the first ultrasonic probe assembly in the direction of gravity is lower than that of the second ultrasonic probe assembly.

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