Covering part, bumper bar and pipeline periscopic surveying and mapping equipment

By combining the design of the rod body, connecting components, limiting components, and actuating components, along with the three-layer structure of the covering component, the problems of the anti-collision rod getting stuck in complex pipelines and the distortion of surveying data are solved, thereby improving the stability of the equipment and the accuracy of surveying.

CN223926712UActive Publication Date: 2026-02-17GUANGDONG XINDA SURVEYING & MAPPING TECH CO LTD
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Patent Information

Application Number
CN202520530906.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-25
Publication Date
2026-02-17
Estimated Expiration
2035-03-25

AI Technical Summary

Technical Problem

Existing crash barriers are prone to getting stuck in narrow pipes or complex bends, failing to provide stable support and adjust their posture, resulting in distorted survey data, and lacking the ability to adapt to the inner diameter of the pipe.

Method used

It adopts a combination design of rod body, connecting component, limiting component and action component, combined with the three-layer structure of the covering component, including wear-resistant outer layer, buffer middle layer and anti-fouling inner layer. Through the cooperation of action component and limiting component, the support point and stability can be automatically adjusted, and the covering component provides protection.

Benefits of technology

It improves the stability, seismic resistance, adaptability, and mapping accuracy of pipeline periscope mapping equipment, extends equipment life, and ensures efficient operation in complex environments.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of pipeline periscopes, and provides a wrapping piece, an anti-collision rod and pipeline periscopic surveying and mapping equipment, the anti-collision rod comprises a rod body, a connecting component, a limiting component and an action component, the action component is arranged at one end of the rod body and is provided with a hollow action part, and the limiting component is arranged at the other end of the rod body. The end portion of one end of the rod body is arranged to be a solid connecting portion, the connecting component is arranged on the outer wall of the connecting portion and fixes the rod body to a connecting device, the action portion is arranged to be a hollow action cavity, and the action component and the limiting component are arranged in the action cavity in a hidden mode. Hidden cavities are symmetrically formed in the outer wall of the action part, and the hidden cavities communicate with the action cavity; after the action component makes contact with an obstacle, the limiting component is triggered to be opened. The utility model provides a novel anti-collision rod structure, which has the advantages of high practicability and good protective property.
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Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline periscope technical field especially relates to a cladding, anti -collision pole and pipeline periscope surveying equipment. BACKGROUND

[0002] The anti -collision pole is one of important components of the pipeline periscope equipment, is installed in one side of the pipeline periscope equipment, is used to adjust the height of pipeline periscope.

[0003] Such as the Chinese patent with the publication number CN 222213063U discloses a kind of anti -collision pole and pipeline periscope equipment, by being arranged as curved structure to anti -collision piece, and when this anti -collision pole is applied to pipeline periscope equipment, equipment gravity center and anti -collision ball can be located in same straight line, but neglects the deviation and stability of pipeline periscope exploration, resulting in the problem of the decline of exploration effect.

[0004] In addition, the prior art also has the following defects:

[0005] 1, existing anti -collision pole is usually fixed straight line or single curved structure, and is prone to jam in narrow pipeline or complex curve, affect normal operation of equipment.

[0006] 2, existing anti -collision pole cannot realize stable support to pipeline periscope surveying equipment, also cannot realize stable limiting of periscope surveying equipment posture, resulting in distortion of surveying data.

[0007] 3, existing anti -collision pole lacks the structure of self -adaptation pipeline, resulting in unable to self -adaptation adjustment inner wall of pipeline.

[0008] In order to solve the problems such as poor stability, unable to realize the adjustment of exploration equipment posture, anti -collision pole lacks stable support capacity, anti -collision pole cannot realize the capacity of self -adaptation pipeline inner diameter in the field, the utility model is made. UTILITY MODEL CONTENTS

[0009] The utility model is directed at the existing deficiencies, and proposes a kind of cladding, anti -collision pole and pipeline periscope surveying equipment.

[0010] In order to overcome the insufficient prior art, the utility model adopts the following technical solutions:

[0011] The application discloses an anti-collision rod which comprises a rod body, a connecting member, a limiting member and a moving member, one end of the rod body is provided with a hollow moving part, the other end of the rod body is provided with a solid connecting part, the connecting member is arranged on the outer wall of the connecting part and is used for fixing the rod body on a connecting device, the moving part is provided with a hollow moving cavity, the moving member and the limiting member are arranged in the moving cavity, and the outer wall of the moving part is symmetrically provided with a hidden cavity which is communicated with the moving cavity.

[0012] The moving member is in contact with an obstacle, and triggers the limiting member to be opened.

[0013] Optionally, the moving member comprises a moving rod, a reset spring, a moving track and a moving block, the moving block is arranged at one end of the moving rod, the other end of the moving rod penetrates through the moving cavity and extends out of the moving cavity to form a probe front end, the reset spring is arranged in the moving cavity and one end of the reset spring is connected with the top wall of the moving cavity, and the other end of the reset spring is connected with the outer top wall of the moving block.

[0014] The side of the moving block, which is directed to the limiting member, is provided with an inclined trapezoidal part which extends into the hidden cavity.

[0015] Optionally, the limiting member is arranged in the hidden cavity, the limiting member comprises a limiting rod, a limiting seat, a magnetic attraction seat and a magnetic attraction piece, the limiting seat is arranged at one end of the hidden cavity, one end of the limiting rod is hingedly connected with the limiting seat to form a hinge part, the magnetic attraction seat is arranged at the other end of the limiting rod, and the magnetic attraction piece is arranged at the other end of the hidden cavity and is oppositely arranged with the magnetic attraction seat.

[0016] The side of the limiting rod, which is directed to the hidden cavity, is provided with an inclined limiting part which is inclined from one end close to the magnetic attraction seat to the hinge part, and the height close to the magnetic attraction seat is lower than the height close to the inclined part.

[0017] Optionally, the connecting member comprises a connecting piece, a connecting seat and a connecting hoop, the connecting hoop is nested on the outer periphery of a pipeline periscope surveying device, the connecting seat is detachably connected with the connecting hoop, the connecting piece is arranged in the connecting part, the side of the connecting seat, which is directed to the connecting hoop, is symmetrically provided with a connecting groove, and the side of the connecting hoop, which is directed to the connecting seat, is symmetrically provided with a connecting protrusion.

[0018] The connecting protrusion and the connecting groove are matched with each other.

[0019] In addition, the application further discloses a cladding piece which is wrapped on the outer surface of the anti-collision rod.

[0020] The cover piece comprises a wear-resistant outer layer, a buffer intermediate layer and a stain-resistant inner layer.

[0021] The wear-resistant outer layer is made of a high-molecular polymer.

[0022] Optionally, the wear-resistant outer layer, the buffer intermediate layer and the stain-resistant inner layer are assembled by lamination.

[0023] Optionally, the cover piece is used to wrap the end of the action rod in a double-layer stacking manner.

[0024] In addition, the utility model provides a pipeline periscope surveying and mapping equipment is connected with the anti -collision rod that is wrapped with the cover piece, the anti -collision rod is connected on the pipeline periscope surveying and mapping equipment, and the probe part is formed to the stretch out towards the operation front end of the pipeline periscope surveying and mapping equipment.

[0025] Optionally, the height of the probe part exceeds the horizontal plane of the lower end surface of the pipeline periscope surveying and mapping equipment.

[0026] Optionally, the anti -collision rod and the pipeline periscope surveying and mapping equipment are detachably connected.

[0027] The utility model discloses the beneficial effects obtained are:

[0028] 1. Through the mutual cooperation of action component and return spring, the limiting component can be automatically recycled after the disappearance of the obstacle, guaranteeing that the equipment does not need manual intervention in the complex environment, improving the intelligentization and convenience of the pipeline periscope surveying and mapping equipment.

[0029] 2. Through the mutual cooperation of action component and limiting component, the anti -collision rod can trigger the limiting component to pop out when contacting the obstacle, guaranteeing that the equipment automatically forms an additional support point when encountering the obstacle, improving the stability and shock resistance of the pipeline periscope surveying and mapping equipment.

[0030] 3. Through the mutual cooperation of limiting component and pipeline inner wall, the anti -collision rod can automatically adjust the support point when running in the pipeline, guaranteeing that the equipment can keep balance in the pipeline of different diameters, improving the adaptability and passability of the pipeline periscope surveying and mapping equipment.

[0031] 4. Through the mutual cooperation of connecting component and anti -collision rod, the anti -collision rod can be stably installed on the pipeline periscope surveying and mapping equipment, guaranteeing that the equipment does not loosen in the running process, improving the stability and durability of the pipeline periscope surveying and mapping equipment.

[0032] 5. Through the cooperation of the connecting member, the limiting member and the action member, the anti-collision rod can not only provide effective anti-collision protection, but also dynamically adjust the support point when encountering obstacles, so that the pipeline periscope surveying device can efficiently operate in various complex pipeline environments, and the accuracy of surveying data and the service life of the device are greatly improved;

[0033] 6. Through the synergistic effect of the three-layer structure, the pipeline periscope surveying device can not only resist impact and wear, but also prevent pollution and corrosion in harsh environments, so that the pipeline periscope surveying device can stably operate in various complex pipeline environments for a long time, and the service life and surveying accuracy are improved;

[0034] In various complex pipeline environments, the service life and surveying accuracy are improved.

[0035] 7. Through the cooperation of the pipeline periscope surveying device, the limiting member and the anti-collision rod, the device can automatically adjust the support point when encountering obstacles, so that the device can maintain stability in different pipeline diameter environments, improve adaptability and passability, and avoid device tilting or jamming. BRIEF DESCRIPTION OF DRAWINGS

[0036] The present application can be further understood from the following description in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale, but the emphasis is placed on showing the principles of the embodiments. In different views, the same reference numerals designate the same parts.

[0037] Figure 1 It is a structural schematic view of the pipeline periscope surveying device, the anti-collision rod, the limiting member, the connecting member and the action member of the present application in the pipeline.

[0038] Figure 2 It is a structural schematic view of the pipeline periscope surveying device, the anti-collision rod, the limiting member, the connecting member and the action member of the present application in the pipeline. Figure 1 It is an enlarged schematic view of part A in the pipeline periscope surveying device.

[0039] Figure 3 It is an enlarged schematic view of part B in the pipeline periscope surveying device. Figure 1 It is an enlarged schematic view of part B in the pipeline periscope surveying device.

[0040] Figure 4 It is a structural schematic view of the pipeline periscope surveying device, the anti-collision rod, the limiting member, the connecting member and the action member of the present application in the pipeline.

[0041] Figure 5 It is an enlarged schematic view of part C in the pipeline periscope surveying device. Figure 4

[0042] Figure 6 It is a structural schematic view of the pipeline periscope surveying device, the anti-collision rod, the limiting member, the connecting member and the action member of the present application in the pipeline.

[0043] Figure 7 ​This is a schematic diagram of the structure of the covering component of this utility model.

[0044] Figure 8 This is a top view of the connector, connecting seat, and connecting hoop of this utility model.

[0045] Figure 9 This is a schematic diagram of the detachable connection between the connector, the connecting seat, and the connecting hoop of this utility model.

[0046] Explanation of reference numerals in the attached drawings: 1. Pipeline periscope mapping equipment; 2. Rod body; 3. Actuating cavity; 4. Hidden cavity; 5. Actuating rod; 6. Limiting seat; 7. Return spring; 8. Limiting rod; 9. Pipeline; 10. Probing front end; 11. Contact pad; 12. Magnetic seat; 13. Magnetic component; 14. Actuating block; 15. Connecting clamp; 16. Anti-fouling inner layer; 17. Buffer intermediate layer; 18. Wear-resistant outer layer; 19. Connecting component; 20. Connecting clamp; 21. Connecting protrusion; 22. Connecting groove; 23. Connecting seat. Detailed Implementation

[0047] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the spirit of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustrative purposes only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0048] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 ,as well as Figure 9 As shown, this embodiment provides a crash barrier, which includes a rod body 2, a connecting member, a limiting member, and an actuating member. The actuating member is provided at one end of the rod body 2 as a hollow actuating part, and at the other end of the rod body 2 as a solid connecting part. The connecting member is provided on the outer wall of the connecting part and fixes the rod body 2 to a connecting device. The actuating part is provided as a hollow actuating cavity 3, and the actuating member and the limiting member are hidden in the actuating cavity 3. The outer wall of the actuating part is symmetrically provided with hidden cavities 4, and the hidden cavities 4 communicate with the actuating cavity 3.

[0049] When the actuating component comes into contact with the obstacle, it triggers the limiting component to open.

[0050] Optionally, the actuating component includes an actuating rod 5, a return spring 7, and an actuating block 14. The actuating block 14 is disposed at one end of the actuating rod 5, and the other end of the actuating rod 5 passes through the actuating cavity 3 and extends out of the actuating cavity 3 to form a probing front end 10. The return spring 7 is disposed in the actuating cavity 3, and one end of the return spring 7 is connected to the top wall of the actuating cavity 3. The other end of the return spring 7 is connected to the outer top wall of the actuating block 14.

[0051] The action block 14 has an inclined trapezoidal part on the side facing the limiting member, and the trapezoidal part extends into the hidden cavity 4.

[0052] like Figure 1 As shown, the actuation cavity 3 is disposed at the end of the actuation rod 5 facing the obstacle, and the actuation cavity 3 penetrates the side of the actuation rod 5 facing the obstacle, so that one end of the actuation rod 5 extends out in the air to form the probing front end 10.

[0053] When the probe tip 10 touches the obstacle, the action rod 5 moves backward under the elastic force of the return spring 7, causing the limiting component to pop out of the hidden cavity 4 and gently abut against the inner wall of the pipe 9, so as to stabilize the mapping posture of the pipe periscope mapping device 1 and ensure the stability and reliability of the mapping process.

[0054] The actuating component also includes a contact pad 11, which is disposed on the outside of the end of the actuating rod 5 away from the fixed part, so that the contact pad 11 can contact the inner wall of the pipe 9, making the mapping posture of the pipe periscope mapping device 1 more stable and reliable.

[0055] Through the cooperation of the actuating components and the return spring 7, the limiting components can be automatically retracted after the obstacle disappears, ensuring that the equipment does not require manual intervention in complex environments, thus improving the intelligence and convenience of the device.

[0056] Optionally, the limiting component is concealed in the hidden cavity 4. The limiting component includes a limiting rod 8, a limiting seat 6, a magnetic seat 12, and a magnetic member 13. The limiting seat 6 is disposed at one end of the hidden cavity 4. One end of the limiting rod 8 is hinged to the limiting seat to form a hinge portion. The magnetic seat 12 is disposed at the other end of the limiting rod 8. The magnetic member 13 is disposed at the other end of the hidden cavity 4 and is disposed opposite to the magnetic seat 12.

[0057] The limiting rod 8 is provided with an inclined limiting portion on the side facing the hidden cavity 4, which is inclined from one end close to the magnetic seat 12 to the hinge portion, and the height close to the magnetic seat 12 is lower than the height close to the inclined portion.

[0058] The action block 14 abuts against the limiting member during movement, and causes the limiting rod 8 of the limiting member to protrude and abut against the inner wall of the pipeline 9.

[0059] The inclined limiting portion and the inclined trapezoidal portion are matched with each other, so that the action block 14 pushes the limiting portion during movement and causes the limiting rod 8 to protrude. Figure 4 As shown.

[0060] Through the cooperation of the action member and the limiting member, the anti-collision rod can trigger the limiting member to pop out when contacting the obstacle, so as to automatically form an additional support point when the device encounters the obstacle, and improve the stability and anti-shock ability of the surveying device.

[0061] In addition, through the cooperation of the limiting member and the inner wall of the pipeline 9, the anti-collision rod can automatically adjust the support point when running in the pipeline 9, so as to ensure that the device can maintain balance in different diameter pipelines 9, and improve the adaptability and passability of the device.

[0062] Optionally, the connecting member includes a connecting piece 19, a connecting seat, and a connecting hoop 20, the connecting hoop 20 is nested on the outer wall of the pipeline periscope surveying device 1, the connecting seat is detachably connected with the connecting hoop 20, the connecting piece 19 is arranged in the connecting portion, and the connecting seat is symmetrically provided with a connecting groove 22 on the side facing the connecting hoop 20, and the connecting hoop 20 is symmetrically provided with a connecting protrusion 21 on the side facing the connecting seat.

[0063] The connecting protrusion 21 and the connecting groove 22 are matched with each other.

[0064] The connecting member fixes the anti-collision rod on the outer wall of the pipeline periscope surveying device 1, and binds the anti-collision rod to the outer wall of the pipeline periscope surveying device 1, so as to improve the safety of the pipeline periscope surveying device 1.

[0065] In the embodiment, the connecting hoop 20 is nested and bound on the pipeline periscope surveying device 1 before use, and the connecting seat and the connecting piece 19 are assembled before entering the pipeline 9 for surveying, so as to realize the assembly of the anti-collision rod and the pipeline periscope surveying device 1.

[0066] Through the cooperation of the connecting member and the anti-collision rod, the anti-collision rod can be stably installed on the pipeline periscope surveying device 1, so as to ensure that the device does not loosen during operation, and improve the stability and durability of the device.

[0067] Through the cooperation of the connecting member, the limiting member and the action member, the anti-collision rod can not only provide effective anti-collision protection, but also dynamically adjust the supporting point when encountering obstacles, so that the device can efficiently operate in various complex pipeline environments, and the accuracy of surveying data and the service life of the device are greatly improved.

[0068] In addition, the utility model provides a kind of cladding, the cladding is wrapped in the outer surface of the anti-collision rod;

[0069] The cladding includes a wear-resistant outer layer 18, a buffer intermediate layer 17 and a stain-resistant inner layer 16.

[0070] The wear-resistant outer layer 18 is made of a high-molecular polymer. The high-molecular polymer can be a high-molecular ceramic polymer wear-resistant coating layer or a high-molecular polymer with wear-resistant properties commonly used in existing technologies, which will not be described here.

[0071] The outer layer of the cladding is configured by the wear-resistant outer layer 18, the buffer intermediate layer 17 and the stain-resistant inner layer 16, so that the anti-collision rod has good anti-collision ability and ensures that the entire anti-collision effect is better, has a long service life, and is wear-resistant.

[0072] Optionally, the wear-resistant outer layer 18, the buffer intermediate layer 17 and the stain-resistant inner layer 16 are assembled by lamination adhesive.

[0073] Optionally, the cladding wraps the end of the action rod 5 in a double-layer stacking manner.

[0074] Through the synergistic effect of the three-layer structure, the device can not only withstand impact and wear in harsh environments, but also prevent stains and corrosion, ensuring that the device can operate stably for a long time in various complex pipeline environments, improving the service life and surveying accuracy.

[0075] In addition, the utility model provides a pipeline periscope surveying device 1 connected with an anti-collision rod wrapped with a cladding, the anti-collision rod is connected to the pipeline periscope surveying device 1 and extends towards the running front end of the pipeline periscope surveying device 1 to form a probe.

[0076] Optionally, the height of the probe exceeds the horizontal plane of the lower end surface of the pipeline periscope surveying device main body.

[0077] Optionally, the anti-collision rod and the pipeline periscope surveying device 1 are detachably connected.

[0078] Through the optimization design of the quick release connecting structure, the anti-collision rod can be quickly disassembled and replaced, so that the equipment can flexibly adapt to different protection requirements in different environments, and the modular expansion and maintenance convenience of the equipment are improved.

[0079] Through the combination of the anti-fouling inner layer 16 of the cover and the lens system of the surveying equipment, the equipment can reduce dirt adhesion in a humid, oily or sewage environment, ensure that the surveying lens remains clean for a long time, and improve the reliability and clarity of the surveying data.

[0080] Through the cooperation of the pipeline periscope surveying equipment 1, the limiting member and the anti-collision rod, the equipment can automatically adjust the support point when encountering obstacles, so that the equipment can remain stable in different pipe 9 diameter environments, improve adaptability and passability, and avoid equipment tilting or jamming.

[0081] In this embodiment, through the comprehensive action of the overall system, the equipment has protection, stability and durability during surveying, and can improve data accuracy and adapt to complex environments, so that the equipment can efficiently operate in various harsh pipe 9 environments, prolong the service life of the equipment, and improve work efficiency.

[0082] The above disclosed content is only a preferred and feasible embodiment of the utility model, and does not limit the protection scope of the utility model, so that equivalent technical changes made by applying the utility model specification and drawings are included in the protection scope of the utility model, and furthermore, the elements can be updated as technology develops.

Claims

1. A crash pole, characterized in that, The anti-collision rod comprises a rod body, a connecting member, a limiting member, and a moving member, one end of the rod body is provided with a hollow moving part, the other end of the rod body is provided with a solid connecting part, the connecting member is arranged on the outer wall of the connecting part and fixes the rod body on a connecting device, the moving part is provided with a hollow moving cavity, and the moving member and the limiting member are hidden in the moving cavity, and the outer wall of the moving part is symmetrically provided with a hidden cavity which is communicated with the moving cavity. The moving member is in contact with the obstacle to trigger the limiting member to be opened.

2. A crash pole according to claim 1, characterised in that The moving member comprises a moving rod, a reset spring, a moving track, and a moving block, the moving block is arranged at one end of the moving rod, the other end of the moving rod penetrates the moving cavity and extends out of the moving cavity to form a probe front end, the reset spring is arranged in the moving cavity, one end of the reset spring is connected with the top wall of the moving cavity, and the other end of the reset spring is connected with the outer top wall of the moving block. The side of the moving block towards the limiting member is provided with an inclined trapezoidal part which extends into the hidden cavity.

3. A crash pole according to claim 2, characterised in that The limiting member is hidden in the hidden cavity, and the limiting member comprises a limiting rod, a limiting seat, a magnetic attraction seat, and a magnetic attraction piece, the limiting seat is arranged at one end of the hidden cavity, one end of the limiting rod is hingedly connected with the limiting seat to form a hinge part, the magnetic attraction seat is arranged at the other end of the limiting rod, and the magnetic attraction piece is arranged at the other end of the hidden cavity and opposite to the magnetic attraction seat. The side of the limiting rod towards the hidden cavity is provided with an inclined limiting part which inclines from one end close to the magnetic attraction seat to the hinge part, and the height close to the magnetic attraction seat is lower than the height close to the inclined part.

4. A crash pole according to claim 3, characterised in that The connecting member comprises a connecting piece, a connecting seat, and a connecting hoop, the connecting hoop is nested on the outer periphery of the pipeline periscope surveying device, the connecting seat is detachably connected with the connecting hoop, the connecting piece is arranged in the connecting part, the side of the connecting seat towards the connecting hoop is symmetrically provided with a connecting groove, and the side of the connecting hoop towards the connecting seat is symmetrically provided with a connecting protrusion. The connecting protrusion and the connecting groove are matched with each other.

5. A covering for use with the crash pole of any one of claims 2 to 4, wherein, The covering member is wrapped on the outer surface of the anti-collision rod. The covering member comprises a wear-resistant outer layer, a buffer intermediate layer, and a stain-resistant inner layer. The material of the wear-resistant outer layer is a high-molecular polymer.

6. The covering of claim 5, wherein, The wear-resistant outer layer, the buffer intermediate layer, and the stain-resistant inner layer are assembled by means of laminated adhesive.

7. The covering of claim 6, wherein, The covering member wraps the end of the moving rod in a double-layer stacking manner.

8. A pipe periscope mapping device, the overwrap of claim 7, wherein, The pipeline periscope surveying device is connected with the anti-collision rod wrapped with the covering member, the anti-collision rod is connected to the pipeline periscope surveying device and extends out of the running front end of the pipeline periscope surveying device to form a probe part.

9. The pipe periscope mapping device of claim 8, wherein, The height of the probe part extending out exceeds the horizontal plane of the lower end surface of the main body of the pipeline periscope surveying device.

10. The pipe periscope mapping device of claim 9, wherein, The anti-collision rod is detachably connected with the pipeline periscope surveying device.

Citation Information

Patent Citations

  • Anti-collision rod and pipeline periscopic equipment

    CN222213063U