A high-precision fire hydrant nondestructive testing device

Abstract

The application relates to the technical field of nondestructive testing, and discloses a high-precision fire hydrant nondestructive testing equipment, which comprises a main body and a probe and further comprises: a blocking mechanism, which is installed on the side wall of the probe; the blocking mechanism is arranged to slow down the loss speed of the bottom coupling agent when the probe is placed on the surface of the fire hydrant; and a plugging mechanism, which is installed on the bottom of the blocking mechanism. The arrangement of the deformation ring drives the internal coupling agent to move synchronously with the probe, thereby reducing the deviation of the measurement results caused by the gap at the bottom of the probe; meanwhile, the arrangement of the deformation ring reduces the influence of air on the detection caused by the long-time non-addition of the coupling agent, and further improves the accuracy and convenience of the high-precision fire hydrant nondestructive testing equipment during detection.

Description

Technical Field

[0001] This invention relates to the field of non-destructive testing technology, specifically a high-precision non-destructive testing device for fire hydrants. Background Technology

[0002] High-precision fire hydrant non-destructive testing equipment does not require damaging the hydrant body. It uses non-destructive testing technology to inspect indoor and outdoor fire hydrant valve bodies, welds, threads and other components. It accurately measures wall thickness, identifies internal cracks, rust, air holes and sand holes and other hidden dangers that are difficult to see with the naked eye, quantifies the degree of corrosion and assesses the service life. It is often used for fire hydrant factory quality inspection, project acceptance and annual inspection of old municipal fire protection facilities, to avoid the risk of pressure bursting and water leakage in advance and ensure the safety of fire water supply. Typical high-precision fire hydrant non-destructive testing equipment works by placing a probe against the surface of the fire hydrant and emitting ultrasonic waves. During testing, a coupling agent needs to be applied to the surface of the fire hydrant. However, the coupling agent is lost as the probe moves across the surface, allowing only short-distance, fixed-point, stable testing. When continuous scanning of the fire hydrant surface is required, operators need to frequently stop the probe to replenish the coupling agent and purge air from the contact surface. This repeated application of coupling agent increases the overall testing time and reduces the convenience of fire hydrant non-destructive testing. Summary of the Invention

[0003] The purpose of this invention is to provide a high-precision non-destructive testing device for fire hydrants to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a high-precision non-destructive testing device for fire hydrants, comprising a main body and a probe, and further comprising: The blocking mechanism is installed on the side wall of the probe. The blocking mechanism slows down the rate of loss of the bottom coupling agent when the probe is placed on the surface of the fire hydrant. The blocking mechanism is installed at the bottom of the blocking mechanism; When the blocking mechanism moves, it will drive the sealing mechanism to move synchronously. When the staff probe slides on the surface of the fire hydrant, the sealing mechanism will undergo a certain deformation.

[0005] Furthermore, the main body includes: Control components are located on the side wall of the main body; The connection component is located on the top of the main body and is configured to provide a data transmission channel between the probe and the main body.

[0006] Furthermore, the blocking mechanism includes: A limiting component is located at the bottom of the probe; The deformation assembly is located at the bottom of the limiting assembly, and the deformation assembly collects the coupling agent accumulated on the rest of the fire hydrant surface.

[0007] Furthermore, the containment mechanisms include: The sealing component is located inside the limiting component, and its design reduces gaps that appear in the limiting component after movement.

[0008] Furthermore, the control component includes several buttons fixedly connected to the side wall of the main body, and the buttons are equidistantly distributed around the main body. The main body has several knobs rotatably connected to its side wall, and these knobs are equidistantly distributed around the main body. A display screen is located on the right side of the knob, and the display screen is fixedly connected to the side wall of the main body; The use of buttons and knobs enhances the user experience of this device.

[0009] Furthermore, the connecting component includes a connecting wire that is fixedly connected to the top of the main body; The end of the connecting wire furthest from the main body is fixedly connected to a probe, and a retaining ring is provided at the end of the connecting wire furthest from the main body; The retaining ring is fixedly connected to the side wall of the probe.

[0010] Furthermore, the limiting component includes a connecting ring fixedly connected to the bottom of the fixing ring, and several rubber rings are fixedly connected to the bottom of the connecting ring; The rubber rings are distributed circumferentially around the probe, and several rubber rings are fixedly connected to the bottom of the deformation rings; The device includes four rubber rings, which provide space for the deformation rings to move when the probe is placed on the fire hydrant.

[0011] Furthermore, the deformation component includes several connecting pieces fixedly connected to the sidewall of the deformation ring, and the several connecting pieces are circumferentially distributed around the connecting ring; A push ring is fixedly connected to one end of several connecting pieces away from the deformation ring; There are four connecting pieces, which are designed to provide support for the push ring and allow sufficient space for deformation.

[0012] Furthermore, the deformation assembly also includes several contact blocks fixedly connected to the side wall of the push ring; Several contact blocks are distributed in a circle around the connecting ring; Among them, the arrangement of several contact blocks allows the contact blocks to squeeze the deformed ring into the probe when the push ring deforms.

[0013] Furthermore, the sealing assembly includes several elliptical rings fixedly connected to the bottom of the connecting ring, with the elliptical rings distributed circumferentially around the probe; The bottom of the elliptical ring is fixedly connected to the top of the deformation ring, and a rubber sheet is fixedly connected inside the elliptical ring. There are four elliptical rings, which will adapt to the curvature of the deformation ring when the deformation ring deforms.

[0014] The present invention has the following beneficial effects: 1. In this invention, the rubber ring and deformation ring form a surrounding ring at the bottom of the probe. Since the deformation ring is located below the bottom surface of the probe, it will first contact the surface of the fire hydrant. The coupling agent within the area enclosed by the deformation ring will be locked. When the probe contacts the surface of the fire hydrant, it will push the excess coupling agent at the bottom towards the inner wall of the deformation ring. At this time, the suspended area at the bottom of the probe will be filled by the pushing of the probe and the obstruction of the inner wall of the deformation ring. When the probe slides under the push of the operator, the deformation ring will cause the internal coupling agent to move synchronously with the probe, thereby reducing the deviation of measurement results caused by gaps at the bottom of the probe. At the same time, the deformation ring reduces the possibility of air at the bottom of the probe affecting the detection due to the lack of adding coupling agent for a long time. This further improves the accuracy and convenience of high-precision fire hydrant non-destructive testing equipment.

[0015] 2. In this invention, when the probe slides under the push of the operator, the deformed push ring will deform in the opposite direction of sliding due to the friction with the surface of the fire hydrant, forming state F in the figure. At this time, the coupling agent located on the outer side of the bottom of the probe is collected by the deformed push ring when the probe moves. At the same time, the fire hydrant has been outdoors for a long time, so small pits and depressions may exist on the surface. When the deformed push ring moves over these pits and depressions, the collected coupling agent will fill the pits and depressions under the influence of the push ring, thereby reducing the frequent fluctuations of the visible wave detected by the probe due to pits and depressions during detection, and further improving the stability of the high-precision fire hydrant non-destructive testing equipment.

[0016] 3. In this invention, the two sides of the horizontal pushing ring will move towards the deformation ring in a parallel state. The movement of the pushing ring will drive the contact block to move synchronously. Under the influence of the pushing ring, the contact block will contact and squeeze the deformation ring. At this time, the deformation ring will be tightly fitted to the arc surface of the fire hydrant under the squeezing of the contact block, thereby reducing the situation where gaps appear in the deformation ring under the influence of pressure and pushing during the movement of the probe, resulting in the loss of coupling agent. This further improves the integrity of the total amount of coupling agent at the bottom of the probe during the detection of the high-precision fire hydrant non-destructive testing equipment.

[0017] 4. In this invention, the deformation of the rubber sheet seals the gap between the rubber rings. Due to the elliptical design of the elliptical ring, when the deformation ring deforms, the elliptical side of the elliptical ring will contact and seal the deformed deformation ring, thereby reducing the possibility of the gap between the deformation ring and the rubber ring being opened after deformation, which would cause the coupling agent to be discharged from the gap when the probe moves. This further improves the sealing of the probe bottom of the high-precision fire hydrant non-destructive testing equipment during testing.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall partial cross-sectional structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged diagram of A in the middle; Figure 4 This is a schematic diagram of the limiting component of the present invention; Figure 5 This is a schematic diagram of the deformation component of the present invention; Figure 6 For the present invention Figure 5 Enlarged diagram of B in the middle; Figure 7 This is a schematic diagram of the sealing component of the present invention; Figure 8 This is a schematic diagram of the state of the deformation component of the present invention after movement.

[0021] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Main body; 11. Control component; 111. Button; 112. Knob; 113. Display screen; 12. Connecting component; 121. Connecting wire; 122. Fixing ring; 2. Blocking mechanism; 21. Limiting component; 211. Connecting ring; 212. Rubber ring; 213. Deformation ring; 22. Deformation component; 221. Connecting piece; 222. Pushing ring; 223. Contact block; 3. Sealing mechanism; 31. Sealing component; 311. Elliptical ring; 312. Rubber sheet; 4. Probe. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1 - Figure 8 As shown, the present invention is a high-precision non-destructive testing device for fire hydrants, comprising a main body 1 and a probe 4, and further comprising: The blocking mechanism 2 is installed on the side wall of the probe 4. The blocking mechanism 2 slows down the rate of loss of the bottom coupling agent when the probe 4 is placed on the surface of the fire hydrant. The blocking mechanism 3 is installed at the bottom of the blocking mechanism 2; When the blocking mechanism 2 moves, it will drive the sealing mechanism 3 to move synchronously. When the staff probe 4 slides on the surface of the fire hydrant, the sealing mechanism 3 will undergo a certain deformation.

[0024] Entity 1 includes: Control component 11 is disposed on the side wall of the main body 1; The connection component 12 is located on the top of the main body 1, and the connection component 12 is configured to provide a data transmission channel between the probe 4 and the main body 1.

[0025] The blocking mechanism 2 includes: Limiting component 21 is disposed at the bottom of probe 4; Deformation component 22 is located at the bottom of the limiting component 21. The deformation component 22 collects the coupling agent accumulated on the rest of the fire hydrant surface.

[0026] Blocking mechanism 3 includes: The sealing component 31 is disposed inside the limiting component 21. The sealing component 31 reduces the gaps that appear in the limiting component 21 after movement.

[0027] The control component 11 includes a plurality of buttons 111 fixedly connected to the side wall of the main body 1, and the plurality of buttons 111 are equidistantly distributed around the main body 1. The side wall of the main body 1 is rotatably connected to several knobs 112, which are equidistantly distributed around the main body 1. A display screen 113 is provided on the right side of the knob 112, and the display screen 113 is fixedly connected to the side wall of the main body 1; The button 111 and knob 112 enhance the human-computer interaction experience of this device. The staff first assembles and fixes the main body 1, connecting wire 121 and probe 4. After assembly, the main body 1 is started for debugging. The waveform reading status of the display screen 113 is confirmed to be normal. Then, the coupling agent is applied to the surface of the fire hydrant so that the bottom surface of the probe 4 is in contact with the outer wall of the fire hydrant.

[0028] The connecting component 12 includes a connecting line 121 that is fixedly connected to the top of the main body 1; A probe 4 is fixedly connected to the end of the connecting wire 121 away from the main body 1, and a fixing ring 122 is provided at the end of the connecting wire 121 away from the main body 1. The fixing ring 122 is fixedly connected to the side wall of the probe 4. The probe 4 emits ultrasonic waves into the fire hydrant, collects the reflected waveforms and completes the data conversion. The data is transmitted to the display screen 113 for visualization via the connecting line 121. The staff can complete the non-destructive testing of the fire hydrant by analyzing the waveform on the display screen 113.

[0029] The limiting component 21 includes a connecting ring 211 fixedly connected to the bottom of the fixing ring 122, and a plurality of rubber rings 212 are fixedly connected to the bottom of the connecting ring 211; Rubber rings 212 are distributed circumferentially around the probe 4, and deformation rings 213 are fixedly connected to the bottom of several rubber rings 212. Four rubber rings 212 are provided. When the probe 4 is placed on the fire hydrant, the rubber rings 212 provide space for the deformation ring 213 to deform. The deformation ring 213 is deformed by the arc shape of the outer surface of the fire hydrant. The deformation ring 213 perpendicular to the arc surface of the fire hydrant will be deformed into a shape that fits the arc surface. The deformation ring 213 tangent to the arc surface will be constrained by its own integral setting. When the deformation ring 213 partially deforms, the entire deformation ring 213 will be pressed and slide upward until the bottom surface of the probe 4 contacts the arc surface of the fire hydrant.

[0030] The deformation component 22 includes a plurality of connecting pieces 221 fixedly connected to the side wall of the deformation ring 213, and the plurality of connecting pieces 221 are distributed circumferentially around the connecting ring 211. A push ring 222 is fixedly connected to one end of several connecting pieces 221 away from the deformation ring 213; The connecting piece 221 is provided with four pieces. The connecting piece 221 is designed to provide support for the pushing ring 222 and leave enough space for deformation. The pushing ring 222 will deform synchronously with the deformation ring 213. At this time, the part of the pushing ring 222 that contacts the arc surface of the fire hydrant will deform. The pushing ring 222 located on the tangent side of the deformation ring 213 will be in a suspended state. When the probe 4 slides under the push of the staff, the deformed pushing ring 222 will deform in the opposite direction of sliding under the influence of friction with the surface of the fire hydrant.

[0031] The deformation assembly 22 also includes a number of contact blocks 223 fixedly connected to the side wall of the push ring 222; Several contact blocks 223 are distributed in a circle around the connecting ring 211; The arrangement of several contact blocks 223 allows the contact blocks 223 to compress the deformed ring 213 towards the probe 4 when the pushing ring 222 deforms. Under the influence of the connecting piece 221, the undeformed pushing ring 222 is driven to move closer to the deformed ring 213. Figure 8 As shown in Figure F, the two sides of the horizontal push ring 222 will move towards the deformation ring 213 in a parallel state. The movement of the push ring 222 will drive the contact block 223 to move synchronously. Under the influence of the push ring 222, the contact block 223 will contact the deformation ring 213 and squeeze the deformation ring 213.

[0032] The sealing assembly 31 includes several elliptical rings 311 fixedly connected to the bottom of the connecting ring 211, and the several elliptical rings 311 are distributed circumferentially around the probe 4. The bottom of the elliptical ring 311 is fixedly connected to the top of the deformation ring 213, and a rubber sheet 312 is fixedly connected inside the elliptical ring 311. There are four elliptical rings 311. When the deformation ring 213 deforms, the elliptical rings 311 adapt to the curvature of the deformation ring 213. The distance between the deformation ring 213 and the connecting ring 211 will gradually decrease. At this time, the top and bottom of the elliptical rings 311 will move towards their own center line. The rubber sheet 312 will deform under the push of the elliptical rings 311. At the same time, the rubber sheet 312 will be blocked by the side wall of the probe 4, and the deformation direction of the rubber sheet 312 can only move outward.

[0033] In use, the staff first assembles and fixes the main body 1, connecting line 121 and probe 4. After assembly, the main body 1 is started for debugging. The waveform reading status of the display screen 113 is confirmed to be normal. Then, the coupling agent is applied to the surface of the fire hydrant so that the bottom surface of the probe 4 is in contact with the outer wall of the fire hydrant. The probe 4 emits ultrasonic waves into the fire hydrant, collects the reflected waveform and completes the data conversion. The data is transmitted to the display screen 113 for visualization through the connecting line 121. The staff can complete the non-destructive testing of the fire hydrant by analyzing the waveform of the display screen 113.

[0034] When the staff applies coupling agent to the surface of the fire hydrant and places the probe 4 for testing, the deformation ring 213 at the bottom of the probe 4 will first contact the surface of the fire hydrant. At this time, the deformation ring 213 will deform due to the arc shape of the outer surface of the fire hydrant. The deformation ring 213 perpendicular to the arc surface of the fire hydrant will deform into a shape that fits the arc surface. The deformation ring 213 tangential to the arc surface will be constrained by its own integral setting. When the deformation ring 213 partially deforms, the entire deformation ring 213 will be pressed and slide upwards until the bottom surface of the probe 4 contacts the arc surface of the fire hydrant. The rubber ring 212 will deform under the influence of the movement of the deformation ring 213. The rubber ring 212 will deform outwards due to the obstruction of the side wall of the probe 4. The rubber ring 212 and the deformation ring 213 will form a surrounding ring at the bottom of the probe 4. At the same time, due to the deformation ring 213... Located below the bottom surface of probe 4, 3 will first contact the surface of the fire hydrant. The couplant within the area enclosed by deformation ring 213 will be locked in place. When probe 4 contacts the surface of the fire hydrant, it will push the excess couplant at the bottom towards the inner wall of deformation ring 213. At this time, the suspended area at the bottom of probe 4 will be filled by the pushing of probe 4 and the obstruction of the inner wall of deformation ring 213. When probe 4 slides under the push of the staff, the setting of deformation ring 213 will cause the internal couplant to move synchronously with probe 4, thereby reducing the deviation of measurement results caused by gaps at the bottom of probe 4. At the same time, the setting of deformation ring 213 reduces the possibility of air at the bottom of probe 4 affecting the detection due to the lack of couplant addition for a long time, further improving the accuracy and convenience of high-precision fire hydrant non-destructive testing equipment.

[0035] When the deformation ring 213 deforms, the push ring 222 will deform synchronously with it. At this time, the part of the push ring 222 in contact with the arc surface of the fire hydrant deforms. The push ring 222 on the tangent side of the deformation ring 213 will be in a suspended state. When the probe 4 slides under the push of the operator, the deformed push ring 222 will deform in the opposite direction of the sliding direction due to friction with the surface of the fire hydrant, thus forming... Figure 8 In the state of F, the coupling agent located on the outer side of the bottom of the probe 4 is collected by the deformed push ring 222 when the probe 4 moves. At the same time, the fire hydrant has been outdoors for a long time, so there will be small pits on the surface. When the deformed push ring 222 moves over these pits, the collected coupling agent will fill the pits under the influence of the push ring 222, thereby reducing the frequent fluctuations of the visible wave detected by the probe 4 due to the pits during the detection, and further improving the stability of the high-precision fire hydrant non-destructive testing equipment.

[0036] When the pushing ring 222 deforms, it will be influenced by the connecting piece 221 to move the undeformed pushing ring 222 closer to the deformed ring 213, such as... Figure 8As shown in Figure F, the two sides of the horizontal push ring 222 will move towards the deformation ring 213 in a parallel state. The movement of the push ring 222 will drive the contact block 223 to move synchronously. Under the influence of the push ring 222, the contact block 223 will contact and squeeze the deformation ring 213. At this time, the deformation ring 213 will be tightly fitted to the arc surface of the fire hydrant under the squeezing of the contact block 223, thereby reducing the situation where the deformation ring 213 will have gaps under the influence of pressure and push when the probe 4 is moving, resulting in the loss of coupling agent. This further improves the integrity of the total amount of coupling agent at the bottom of the probe 4 during the detection of the high-precision fire hydrant non-destructive testing equipment.

[0037] When the deformation ring 213 is compressed and deformed, the gap between the deformation ring 213 and the connecting ring 211 will gradually decrease. At this time, the top and bottom of the elliptical ring 311 will move towards its own centerline. The rubber sheet 312 will deform under the push of the elliptical ring 311. At the same time, the rubber sheet 312 will be blocked by the side wall of the probe 4, and the deformation direction of the rubber sheet 312 can only move outward. The deformation of the rubber sheet 312 will seal the gap between the rubber rings 212. Due to the elliptical design of the elliptical ring 311, when the deformation ring 213 deforms, the elliptical side of the elliptical ring 311 will contact and seal the deformed deformation ring 213, thereby reducing the possibility of the gap between the deformation ring 213 and the rubber ring 212 being opened after deformation, which would cause the coupling agent to be discharged from the gap when the probe 4 moves. This further improves the sealing of the bottom of the probe 4 during the high-precision fire hydrant non-destructive testing equipment.

[0038] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-precision non-destructive testing device for fire hydrants, comprising a main body (1) and a probe (4), characterized in that, Also includes: The blocking mechanism (2) is installed on the side wall of the probe (4). The blocking mechanism (2) slows down the rate of loss of the bottom coupling agent when the probe (4) is placed on the surface of the fire hydrant. The blocking mechanism (3) is installed at the bottom of the blocking mechanism (2).

2. The high-precision non-destructive testing equipment for fire hydrants according to claim 1, characterized in that: The main body (1) includes: A control component (11) is disposed on the side wall of the main body (1); A connection component (12) is disposed on the top of the main body (1), and the connection component (12) is configured to provide a data transmission channel between the probe (4) and the main body (1).

3. The high-precision non-destructive testing equipment for fire hydrants according to claim 2, characterized in that: The blocking mechanism (2) includes: A limiting component (21) is disposed at the bottom of the probe (4); Deformation component (22), which is disposed at the bottom of the limiting component (21), is disposed to collect the coupling agent accumulated on the rest of the fire hydrant surface.

4. The high-precision non-destructive testing equipment for fire hydrants according to claim 3, characterized in that: The blocking mechanism (3) includes: A blocking component (31) is disposed inside the limiting component (21), and the blocking component (31) reduces the gaps that appear in the limiting component (21) after movement.

5. The high-precision non-destructive testing equipment for fire hydrants according to claim 4, characterized in that: The control component (11) includes a number of buttons (111) fixedly connected to the side wall of the main body (1), and the number of buttons (111) are equidistantly distributed around the main body (1); The side wall of the main body (1) is rotatably connected to several knobs (112), and the several knobs (112) are equidistantly distributed around the main body (1); A display screen (113) is provided on the right side of the knob (112), and the display screen (113) is fixedly connected to the side wall of the main body (1).

6. The high-precision non-destructive testing equipment for fire hydrants according to claim 4, characterized in that: The connecting component (12) includes a connecting line (121) fixedly connected to the top of the body (1). The probe (4) is fixedly connected to one end of the connecting line (121) away from the main body (1), and a fixing ring (122) is provided at the other end of the connecting line (121) away from the main body (1). The fixing ring (122) is fixedly connected to the side wall of the probe (4).

7. A high-precision non-destructive testing device for fire hydrants according to claim 6, characterized in that: The limiting component (21) includes a connecting ring (211) fixedly connected to the bottom of the fixing ring (122), and a plurality of rubber rings (212) are fixedly connected to the bottom of the connecting ring (211). The rubber rings (212) are distributed circumferentially around the probe (4), and deformation rings (213) are fixedly connected to the bottom of several rubber rings (212).

8. The high-precision non-destructive testing equipment for fire hydrants according to claim 7, characterized in that: The deformation component (22) includes a plurality of connecting pieces (221) fixedly connected to the side wall of the deformation ring (213), and the plurality of connecting pieces (221) are distributed circumferentially around the connecting ring (211); A push ring (222) is fixedly connected to one end of each of the connecting pieces (221) away from the deformation ring (213).

9. A high-precision non-destructive testing device for fire hydrants according to claim 8, characterized in that: The deformation component (22) also includes a number of contact blocks (223) fixedly connected to the side wall of the push ring (222); Several of the contact blocks (223) are distributed circumferentially around the connecting ring (211).

10. A high-precision non-destructive testing device for fire hydrants according to claim 6, characterized in that: The sealing assembly (31) includes several elliptical rings (311) fixedly connected to the bottom of the connecting ring (211), and the several elliptical rings (311) are distributed circumferentially around the probe (4); The bottom of the elliptical ring (311) is fixedly connected to the top of the deformation ring (213), and a rubber sheet (312) is fixedly connected inside the elliptical ring (311).

Images