A fixing device for a pressure sensor arranged on a flexible pipe

Abstract

The embodiment of the application provides a fixing device of a pressure sensor arranged on a flexible pipeline, which comprises a shell and a fixing part, the fixing part is used for fixing a sensor body, the fixing part is provided with a first cavity for accommodating the sensor body, the sensor body is arranged in the first cavity, a protrusion is arranged on the periphery of the first cavity, a second cavity corresponding to the position of the protrusion is arranged in the shell, the protrusion extends into the second cavity and does not contact the inner wall of the second cavity; the embodiment of the application adopts the double fixing of the external shell and the fixing part on the pressure sensor, the shell and the fixing part do not contact each other, when the flexible pipeline deforms or relative displacement occurs between the flexible pipeline and the fixing device, the connection part of the pressure sensor and the flexible pipeline can maintain good sealing, and the medical risk caused by the leakage of the connection part of the pressure sensor and the flexible pipeline is greatly reduced.

Description

Technical Field

[0001] The embodiments of this application belong to the field of medical devices, and specifically relate to a fixing device for a pressure sensor disposed on a flexible pipe. Background Technology

[0002] Real-time blood pressure monitoring is crucial during extracorporeal circulation (CPB). This is especially true during extracorporeal membrane oxygenation (ECMO) operations, where pressure monitoring of critical components is essential. Due to the inherently high blood flow rate and velocity of ECMO, the safety requirements for the entire medical circulation tubing are extremely high. Current pressure sensors require the sensor probe to directly contact the surface of the liquid being tested and need to be in contact with air to function properly. This necessitates drilling a hole in the tubing to insert the sensor probe and using a fixing device to secure the pressure sensor. However, commonly used medical circulation tubing is often made of flexible PU or PVC. If this flexible tubing is stretched or moved, the pores where the pressure sensor is located could potentially lead to blood leakage, with potentially serious consequences. Therefore, the sealing and securing of the pressure sensor to the tubing is a critical issue that must be addressed, and it is also a requirement for risk management in medical device products.

[0003] In practical use, factors such as the orientation adjustment of the flexible tubing itself, the doctor's observation of the moving tubing, and vibrations during transport can all cause deformation of the flexible tubing or relative displacement between the flexible tubing and the fixing device, leading to sealing problems at the connection between the probe and the flexible tubing. In existing technologies, such as patent CN213748567U, the pressure sensor is fixed to the housing during installation. When the flexible tubing deforms or relative displacement occurs between the flexible tubing and the fixing device, the interaction force between the two can easily cause the probe to detach, resulting in leakage and rendering the pressure sensor malfunctioning. Summary of the Invention

[0004] To address or mitigate the problems existing in the installation of pressure sensors in flexible pipelines in the prior art, and in particular to reduce the risk of leakage at the installation site of pressure sensors in medical flexible pipelines in the medical field, this application provides a fixing device for a pressure sensor installed on a flexible pipeline, including a housing and a fixing component;

[0005] Both the housing and the fixing component are sleeved around the flexible pipe, and the two do not contact each other. The housing is sleeved around the fixing component at intervals. The fixing component is used to fix the sensor body. The probe connected to the sensor body penetrates the flexible pipe and comes into contact with the liquid inside the flexible pipe.

[0006] The fixing member is provided with a first cavity for accommodating the sensor body, and the sensor body is disposed in the first cavity;

[0007] The outer periphery of the first cavity is provided with a protrusion, and the inside of the protrusion is provided with a channel communicating with the first cavity. A through hole is provided on the shell at a position corresponding to the protrusion, and the through hole communicates with the protrusion to allow the first cavity to communicate with the outside atmosphere.

[0008] A second cavity is provided inside the shell at the position corresponding to the protrusion. The protrusion extends into the second cavity but does not contact the inner wall of the second cavity, so that the protrusion can move freely inside the second cavity without being restricted by the shell.

[0009] Furthermore, a limiting groove is provided at the opening of the protrusion near the shell and / or at the channel opening of the protrusion away from the shell, and a waterproof and breathable membrane is provided inside the limiting groove.

[0010] Furthermore, the length of the fastener is more than twice that of the sensor body.

[0011] Furthermore, the fastener has an arc-shaped surface on the side near the flexible pipe that fits against the outer surface of the flexible pipe, and the arc length of the arc-shaped surface is not less than 1 / 4 of the perimeter of the cross-section of the flexible pipe.

[0012] Furthermore, the arc length of the curved surface is equal to half the perimeter of the flexible pipe's cross-section.

[0013] Furthermore, a flow guide groove is provided on the surface where the fastener fits into the flexible pipe.

[0014] Furthermore, an anti-slip element is provided between the flexible pipe side away from the fixed component and the shell to prevent axial movement between the flexible pipe and the shell.

[0015] Furthermore, the sensor body is flat.

[0016] Furthermore, the side of the sensor body closest to the flexible pipe is in contact with the flexible pipe.

[0017] Furthermore, the probe is vertically positioned on the sensor body.

[0018] Furthermore, both ends of the shell are fixed to the outer surface of the flexible pipe by fastening devices.

[0019] Furthermore, the fastening device includes a threaded ring and a nut, with a flexible conduit passing through the threaded ring and the nut, and the nut being threadedly connected to the threaded ring.

[0020] This embodiment of the application provides a second cavity inside the housing at the position corresponding to the protrusion. The protrusion extends into the second cavity but does not contact the inner wall of the second cavity. At this time, the movement of the protrusion inside the second cavity is not restricted by the housing. When the flexible pipe deforms or there is relative displacement between the flexible pipe and the fixing device, the protrusion can move inside the second cavity while ensuring the normal operation of the pressure sensor. There will be no interaction force between the two, and the fixing device, sensor body and probe will not be detached from the flexible pipe. This achieves the effect of ensuring the sealing of the device and preventing leakage when the flexible pipe deforms or there is relative displacement between the flexible pipe and the fixing device. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. Some specific embodiments of this application will be described in detail below with reference to the accompanying drawings in an exemplary and non-limiting manner. The same reference numerals in the drawings designate the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0022] Figure 1 This is a three-dimensional sectional view of the fixing device according to an embodiment of this application;

[0023] Figure 2 This is a front cross-sectional view of the fixing device according to an embodiment of this application;

[0024] Figure 3 This is a three-dimensional structural diagram of the fastener in an embodiment of this application;

[0025] Figure 4 This is a bottom view of the fastener in an embodiment of this application;

[0026] Figure 5 Examples of this application Figure 2 Enlarged view of point A in the middle;

[0027] Figure 6 This is a side view of the fastener according to an embodiment of this application;

[0028] Figure 7 This is a front cross-sectional view of the shell according to an embodiment of this application;

[0029] Figure 8 This is a three-dimensional structural diagram of the shell according to an embodiment of this application;

[0030] Figure 9 Examples of this application Figure 2 Enlarged view of section B in the middle.

[0031] In the diagram: 1. Housing; 11. Through hole; 12. Second cavity; 13. Mounting hole; 14. Glue injection hole; 2. Fixing component; 21. First cavity; 22. Protrusion; 23. Channel; 24. Limiting groove; 25. Clearance opening; 26. Reinforcing rib; 27. Platform; 28. Flow guide groove; 3. Flexible pipe; 4. Sensor body; 41. Probe; 5. Waterproof and breathable membrane; 6. Anti-slip component; 7. Fastening device; 71. Threaded ring; 72. Nut; 8. Connector. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort should fall within the scope of protection of the present application.

[0033] like Figure 1-5 As shown, this application embodiment provides a fixing device for a pressure sensor installed on a flexible pipe, including a housing 1 and a fixing member 2;

[0034] The pressure sensor includes a sensor body 4 and a probe 41;

[0035] The housing 1 and the fixing member 2 are both sleeved around the flexible pipe 3, and the two do not contact each other. The housing 1 is sleeved around the fixing member 2 at intervals. The fixing member 2 is used to fix the sensor body 4. The probe 41 connected to the sensor body 4 penetrates the flexible pipe 3 and contacts the liquid inside the flexible pipe 3. Before this, a hole of the size of the probe 41 needs to be drilled in the flexible pipe 3 in advance, and then the probe 41 is inserted into the hole so that the probe 41 contacts the liquid inside the flexible pipe 3. The gap between the sensor body 4 and the flexible pipe 3 needs to be filled with UV glue and then cured by UV lamp.

[0036] The fastener 2 is provided with a first cavity 21 for accommodating the sensor body 4. The sensor body 4 is placed in the first cavity 21. At this time, UV glue needs to be applied to the side of the fastener 2 that is in contact with the flexible pipe 3 so that the fastener 2 is fixedly installed on the flexible pipe 3.

[0037] The outer periphery of the first cavity 21 is provided with a protrusion 22, and the protrusion 22 is provided with a channel 23 communicating with the first cavity 21. A through hole 11 is provided on the housing 1 at a position corresponding to the protrusion 22. The through hole 11 communicates with the protrusion 22 to allow the first cavity 21 to communicate with the outside atmosphere.

[0038] A second cavity 12 is provided inside the housing 1 at the position corresponding to the protrusion 22. The protrusion 22 extends into the second cavity 12 and does not contact the inner wall of the second cavity 12, so that the protrusion 22 can move freely inside the second cavity 12 without being restricted by the housing 1.

[0039] In this embodiment, the sensor body 4 is mounted on the flexible pipe 3 by the fastener 2, and the sensor body 4, the fastener 2 and the flexible pipe 3 are fixed by applying UV glue, which improves the sealing of the connection between the pressure sensor and the flexible pipe 3.

[0040] By providing a protrusion 22 on the fixing member 2, the sensor body 4 is allowed to be exposed to the outside atmosphere, enabling the sensor body 4 to function normally. Furthermore, a second cavity 12 is provided inside the housing 1 at a position corresponding to the protrusion 22, with the protrusion 22 extending into the second cavity 12 without contacting the inner wall of the second cavity 12. In this case, the protrusion 22 can move freely within the second cavity 12 without being restricted by the housing 1. When the flexible pipe 3 deforms or there is relative displacement between the flexible pipe 3 and the fixing device 7, the protrusion 22 can still move freely within the second cavity 12 while ensuring the normal operation of the sensor body 4. No interaction force will be generated between the two, preventing the fixing member 2, sensor body 4, and probe 41 from detaching from the flexible pipe 3. This achieves the effect of ensuring the sealing of the device and preventing leakage when the flexible pipe 3 deforms or there is relative displacement between the flexible pipe 3 and the fixing device 7.

[0041] In one embodiment, a limiting groove 24 is provided at the opening of the protrusion 22 near the housing 1 and / or at the opening of the channel 23 of the protrusion 22 away from the housing 1, and a waterproof and breathable membrane 5 is provided inside the limiting groove 24.

[0042] In this embodiment, a waterproof and breathable membrane 5 is provided at the opening of the tube near the housing 1 of the protrusion 22. The purpose is to prevent external moisture, dust and other substances from entering the first cavity 21, which would damage the sensor body 4 inside the first cavity 21 and prevent it from working properly. At the same time, it can also allow the atmosphere to pass through, so that the sensor body 4 can work properly.

[0043] In one embodiment, the fastener 2 has several arrayed reinforcing ribs 26 on both sides.

[0044] In this embodiment, by providing several reinforcing ribs 26 on both sides of the fastener 2, the purpose is to improve the strength of the fastener 2 itself.

[0045] In one embodiment, the fastener 2 is provided with a plurality of platforms 27.

[0046] In this embodiment, the purpose of providing a platform 27 on the fastener 2 is to facilitate the installation and disassembly of the fastener 2.

[0047] In one embodiment, a guide groove 28 is provided on the surface of the fastener 2 that is in contact with the flexible pipe 3.

[0048] In this embodiment, by providing a guide groove 28 on the surface where the fastener 2 and the flexible pipe 3 are in contact, the purpose is to guide the injected adhesive during the injection process, and to ensure that the injected adhesive is evenly distributed through the guide groove 28, so that the fastener 2 can be better fixed on the flexible pipe.

[0049] In addition, the flow guide 28 can serve as a basis for judging whether the fastener 2 and the flexible pipe 3 are well bonded. If there are no air bubbles in the flow guide 28, then at least the airtightness of the bond between the fastener 2 and the flexible pipe 3 can be guaranteed. Preferably, the flow guide 28 is a U-shaped channel.

[0050] In one embodiment, the length of the fastener 2 is more than twice that of the sensor body 4.

[0051] In this embodiment, the length of the fastener 2 is set to be more than twice the length of the detector body. The purpose is to provide a larger contact area and more fixing points, thereby increasing the stability of the fixation. This reduces the possibility of loosening and shaking, ensuring that the fastener 2 is firmly held in place. The longer fastener 2 generally has higher strength and rigidity, providing a greater strength reserve, allowing the fastener 2 to withstand greater forces and loads, thereby increasing the reliability of the fixation. The longer fastener 2 can disperse forces and stresses, reducing the concentration of local stresses, thereby reducing the risk of fatigue and damage to the fastener 2. This can extend the service life of the fastener 2 and reduce the frequency of maintenance and replacement.

[0052] Specifically, the length of the sensor body 4 is 8-10mm, preferably 9.18mm; the length of the fastener 2 is 20-30mm, preferably 24.44mm.

[0053] In one embodiment, the length of the housing 1 is more than twice the length of the fastener 2.

[0054] In this embodiment, this arrangement ensures that the flexible pipes 3 at both ends of the fixing member 2 are always in the same straight line, making it less likely for the part of the flexible pipe 3 located inside the housing 1 to be bent or deformed.

[0055] Specifically, the length of housing 1 is 70-90mm, preferably 78.95mm.

[0056] In one embodiment, the sensor body 4 is flat.

[0057] In this embodiment, the flat sensor body 4 is designed to be thin, making it compact and more suitable for applications with limited space. It can be easily installed in narrow spaces or on curved surfaces. Due to its compact structure, the flat sensor body 4 has a large contact area between the sensing element and the measured medium, resulting in a relatively fast response speed. The fast response and low inertia of the flat sensor body 4 make it more suitable for dynamic pressure measurement.

[0058] In one embodiment, the side of the sensor body 4 closest to the flexible pipe 3 is in contact with the flexible pipe 3.

[0059] In this embodiment, by designing the side of the sensor body 4 close to the flexible pipe 3 to fit snugly against the flexible pipe 3, the gap between the sensor body 4 and the flexible pipe 3 can be reduced, thereby improving the sealing performance at the connection between the sensor body 4 and the flexible pipe 3.

[0060] In one embodiment, the probe 41 is vertically disposed on the sensor body 4.

[0061] In this embodiment, by designing the probe 41 perpendicular to the sensor body 4, the influence of liquid fluctuations in the tube on the measurement of the sensor body 4 can be reduced. The vertical setting maximizes the vertical component of the medium pressure acting on the probe 41, while the horizontal component of the fluctuations is relatively small, thereby improving the stability and accuracy of the measurement. The vertical setting also maximizes the contact area between the sensor probe 41 and the measured medium, thereby improving the sensor's sensitivity. Furthermore, the vertical setting reduces errors and drift caused by gravity or other factors.

[0062] like Figure 6 As shown, in one embodiment, the fastener 2 has an arc-shaped surface that fits against the outer surface of the flexible pipe 3 on the side near the flexible pipe 3, and the arc length of the arc-shaped surface is not less than 1 / 4 of the perimeter of the cross-section of the flexible pipe 3.

[0063] In this embodiment, by setting the arc length of the curved surface to be no less than 1 / 4 of the perimeter of the cross-section of the flexible pipe 3, the purpose is to increase the contact area between the fastener 2 and the flexible pipe 3. This provides more contact points, increases the friction between the surfaces of the fastener 2 and the flexible pipe 3, thereby increasing the anti-slip ability of the fastener 2, making it more firmly held in place, and reducing the possibility of loosening and shaking. The larger contact area can distribute the load and reduce the concentration of local stress, thus reducing the stress concentration on the surfaces of the fastener 2 and the flexible pipe 3, and reducing the risk of deformation and damage to the fastener 2. The larger contact area can increase the friction between the surfaces of the fastener 2 and the flexible pipe 3, making it more resistant to the impact force caused by vibration, thereby improving the seismic performance of the fastener 2.

[0064] In addition, the larger the contact area between the fastener 2 and the flexible pipe 3, the more difficult it is for the fastener 2 to detach from the surface of the flexible pipe 3.

[0065] Preferably, the arc length of the curved surface is equal to half the perimeter of the cross-section of the flexible pipe 3.

[0066] like Figure 7-8 As shown, in one embodiment, an anti-slip element 6 is provided between the flexible pipe 3 side away from the fixing element 2 and the housing 1. The anti-slip element 6 is used to prevent the flexible pipe 3 and the housing 1 from moving axially.

[0067] In this embodiment, by providing an anti-slip element 6 between the side away from the flexible pipe 3 and the housing 1, the anti-slip element 6 can prevent the flexible pipe 3 from axially moving inside the housing 1 under the action of external force.

[0068] In one embodiment, the housing 1 is provided with a mounting hole 13, a connector 8 is provided at the mounting hole 13, the fastener 2 is provided with a clearance opening 25, the clearance opening 25 is connected to the first cavity 21, and one end of the sensor body 4 extends out of the clearance opening 25 and is electrically connected to the connector 8.

[0069] In this embodiment, by providing mounting hole 13, the connector 8 can be installed at mounting hole 13 on housing 1. The fastener 2 is provided with clearance 25. One end of sensor body 4 extends to clearance 25 and is then electrically connected to connector 8. Connector 8 is also connected to an external host.

[0070] In one embodiment, the housing 1 is provided with an injection hole 14.

[0071] In this embodiment, by providing a glue injection hole 14 on the housing 1, silicone can be injected into the housing 1 after the housing 1 is installed until it overflows. The purpose is to fill the space inside the housing 1, so that the internal components are relatively fixed, thereby improving the stability and sealing of the device.

[0072] Specifically, the filler amount is 5-8g. Before injection, the channels 23 and through holes 11 of the protrusion 22 are blocked with pins to prevent glue from entering the channels 23 and through holes 11 during injection and curing. Finally, after the glue has cured, the pins are removed to ensure that the sensor chip can be successfully connected to the atmosphere for calibration. Additionally, channel 23 has a draft angle and a platform at the bottom to prevent the pins from puncturing the waterproof and breathable membrane 5. The draft angle, also known as the ejection angle, is a slope designed on both sides of the mold cavity to facilitate demolding. The orientation of the ejection angle depends on the internal and external dimensions of the plastic part. To ensure smooth ejection of the molded part from the mold, draft angles must be set on the walls (including side cores and reinforcing ribs) in the same direction as the mold opening and closing to facilitate demolding.

[0073] like Figure 9 In one embodiment, the two ends of the housing 1 are respectively fixed to the outer surface of the flexible pipe 3 by fastening devices 7.

[0074] In this embodiment, fastening devices 7 are provided at both ends of the housing 1 to prevent the housing 1 from being fixed on the flexible pipe 3 and to prevent the housing 1 from sliding.

[0075] In one embodiment, the fastening device 7 includes a threaded ring 71 and a nut 72, with a flexible conduit 3 passing through the threaded ring 71 and the nut 72, and the nut 72 being threadedly connected to the threaded ring 71.

[0076] In this embodiment, by screwing the nut 72 onto the threaded ring 71, the nut 72 and the threaded ring 71 are threadedly connected, thereby fixing the housing 1 onto the flexible pipe 3.

[0077] In one embodiment, the threaded ring 71 is provided with several notches, and the inner diameter of the end of the nut 72 near the housing 1 is larger than the inner diameter of the end away from the housing 1.

[0078] In this embodiment, by providing several notches on the threaded ring 71 and designing the inner diameter of the end of the nut 72 closer to the housing 1 to be larger than the inner diameter of the end farther from the housing 1, when the nut 72 is gradually screwed onto the threaded ring 71, as the inner diameter of the end of the nut 72 farther from the housing 1 becomes smaller and smaller, the notches on the threaded ring 71 will gradually become smaller and the opening of the threaded ring 71 will gradually close, thereby achieving the effect of clamping the flexible pipe 3, preventing the housing 1 from sliding on the flexible pipe 3, and further improving the stability of the connection between the housing 1 and the flexible pipe 3.

[0079] In one embodiment, housing 1 includes a first housing and a second housing, and the first housing and the second housing are detachably connected.

[0080] In this embodiment, the housing 1 is assembled from a first housing and a second housing. This arrangement is for the purpose of facilitating installation, allowing the housing 1 to be quickly installed on the flexible pipe 3. Preferably, the connection method is snap-fit, and after the first housing and the second housing are snapped together, the connection between the first housing and the second housing can be further strengthened by the fastening device 7.

[0081] In one embodiment, the installation steps for the fixing device are as follows:

[0082] Drill holes in the flexible pipe 3 and insert the probe 41 into the flexible pipe 3; install the sensor body 4 on the outer surface of the pipe, apply UV glue to the gap between the sensor body 4 and the flexible pipe 3, and then use a UV lamp to cure it.

[0083] Electrically connect the connector to the sensor body 4;

[0084] Apply UV adhesive to the arc-shaped surface where the fastener 2 and the flexible pipe 3 fit together, place the waterproof and breathable membrane 5 in the limiting groove 24, and make the sensor body 4 located in the first cavity 21. Install the fastener 2 onto the pipe, and then inject adhesive into the guide groove 28.

[0085] Install the connector into the mounting hole 13 of the housing 1, align the protrusion 22 on the fastener 2 and place it into the second cavity 12, put the anti-slip part 6 on the flexible pipe 3, and then put the housing 1 on the pipe.

[0086] Connect the nut 72 to the threaded ring 71;

[0087] Block the channel 23 and through hole 11 of the protrusion 22, and inject silicone into the inside of the housing 1 through the injection hole 14.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A fixing device for a pressure sensor mounted on a flexible pipe, characterized in that, Includes housing and fasteners; The housing and the fixing member are both sleeved around the flexible pipe, and the two do not contact each other. The housing is spaced around the fixing member. The fixing member is used to fix the sensor body. The probe connected to the sensor body penetrates the flexible pipe and contacts the liquid inside the flexible pipe. The sensor body is flat. The fixing member is provided with a first cavity for accommodating the sensor body, and the sensor body is disposed in the first cavity; The first cavity has a protrusion on its periphery, and the protrusion has a channel communicating with the first cavity. A through hole is provided on the housing at a position corresponding to the protrusion, and the through hole communicates with the protrusion to allow the first cavity to communicate with the outside atmosphere. A second cavity is provided inside the housing corresponding to the position of the protrusion. The protrusion extends into the second cavity but does not contact the inner wall of the second cavity.

2. The fixing device for the pressure sensor disposed on the flexible pipe according to claim 1, characterized in that, The length of the fixing component is more than twice that of the sensor body.

3. The fixing device for the pressure sensor disposed on the flexible pipe according to claim 1, characterized in that, The fastener has an arc-shaped surface on the side near the flexible pipe that fits against the outer surface of the flexible pipe, and the arc length of the arc-shaped surface is not less than 1 / 4 of the perimeter of the cross-section of the flexible pipe.

4. The fixing device for the pressure sensor disposed on the flexible pipe according to claim 3, characterized in that, The arc length of the curved surface is equal to half the perimeter of the cross-section of the flexible pipe.

5. The fixing device for the pressure sensor disposed on the flexible pipe according to claim 1, characterized in that, A flow guide groove is provided on the surface of the fastener that is in contact with the flexible pipe.

6. The fixing device for the pressure sensor disposed on the flexible pipe according to claim 1, characterized in that, An anti-slip element is provided between the flexible pipe side away from the fixing member and the housing, the anti-slip element being used to prevent the flexible pipe from moving axially with the housing.

7. The fixing device for the pressure sensor disposed on the flexible pipe according to claim 1, characterized in that, The sensor body is attached to the flexible pipe on the side closest to the flexible pipe.

8. The fixing device for the pressure sensor disposed on the flexible pipe according to claim 7, characterized in that, The probe is vertically mounted on the sensor body.

9. The fixing device for the pressure sensor disposed on the flexible pipe according to claim 1, characterized in that, Both ends of the housing are fixed to the outer surface of the flexible pipe by fastening devices.

10. The fixing device for the pressure sensor disposed on the flexible pipe according to claim 9, characterized in that, The fastening device includes a threaded ring and a nut, the flexible pipe passes through the threaded ring and the nut, and the nut is threadedly connected to the threaded ring.

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