Hydraulic pipeline monitoring device

Abstract

The utility model relates to the technical field of hydraulic pipeline monitoring, in particular to a hydraulic pipeline monitoring device. The measuring end of the measuring sensor is hermetically mounted at the tail end of a pipeline to monitor pressure parameters; the sealing connecting assembly comprises an inner pipe connecting piece, a conical sleeve and a locking nut, double sealing faces are formed through radial deformation of the conical sleeve under pressure, leakage is prevented, stable measurement is guaranteed, and overhaul and maintenance are convenient. The transmission cable is provided with an outer sheath, a power line, a signal transmission line and a crisscross reinforcing rib, so that the insulation, tensile and anti-torsion capabilities are improved; the monitoring box is connected with the cable, the displayer displays pressure in real time, the buzzer can give an alarm about pressure abnormity, and the device is reliable in sealing, convenient to maintain, stable in transmission and capable of finding abnormity in time.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic pipeline monitoring technical field, especially relates to a hydraulic pipeline monitoring device. BACKGROUND

[0002] As the core component of power transmission in industrial equipment, the stability of the pipeline pressure of the hydraulic system is directly related to the safety and efficiency of equipment operation, and abnormal internal pressure of the hydraulic pipeline may lead to system failure, component damage and even safety accidents, therefore, real-time monitoring of the hydraulic pipeline pressure is the key to guaranteeing reliable operation of the system.

[0003] In the prior art, the hydraulic pipeline pressure is usually monitored by a pressure sensor connected to the side wall of the pipeline through a flange or a threaded joint, an installation hole is formed in the side wall of the pipeline, the sensor probe is embedded in the hole, sealing is realized by using a rubber sealing ring, and the sensor transmits electrical signals to an external display terminal through a cable, however, in high-pressure or pipeline vibration working conditions, the sealing structure is prone to aging or deformation, leading to sealing failure and medium leakage, and the installation hole needs to be processed in the side wall of the pipeline and a plurality of fasteners need to be configured, the installation process is complicated and the pipeline structure strength is prone to be damaged, the whole needs to be disassembled and replaced in case of failure, increasing the maintenance cost, therefore, there is an urgent need for a hydraulic pipeline monitoring device to solve the above problems. SUMMARY

[0004] To overcome the above problems of the prior art, the utility model provides a hydraulic pipeline monitoring device, which solves the technical problems that the sealing structure of the sensor and the pipeline connection is prone to aging or deformation, leading to sealing failure and medium leakage, and the installation and maintenance process is complicated.

[0005] To achieve the above purpose, the utility model is realized by the following technical scheme:

[0006] A hydraulic pipeline monitoring device is used for being installed in series on a hydraulic pipeline to monitor the pressure in the hydraulic pipeline in real time, comprising:

[0007] A measurement sensor, a measurement end of the measurement sensor is sealingly installed at the end of the hydraulic pipeline, and the measurement sensor is used for monitoring the pressure parameter in the hydraulic pipeline in real time.

[0008] A sealed connection assembly is arranged at the connection between a hydraulic pipeline and a measuring sensor, and seals the communication between the hydraulic pipeline and the measuring sensor, and comprises an inner pipe connector, a conical sleeve and a locking nut, the hydraulic pipeline is inserted into the pipe opening of the inner pipe connector, the pipe opening of the inner pipe connector is provided with a conical sealing surface matched with the conical sleeve, the conical sleeve and the locking nut are sequentially sleeved on the hydraulic pipeline, the conical sleeve is located between the inner pipe connector and the locking nut, and the locking nut is threadedly connected with the inner pipe connector, when the locking nut axially presses the conical sleeve, the conical sleeve is compressed in the axial direction and deformed in the radial direction, and the inner and outer surfaces of the conical sleeve are respectively matched with the outer surface of the hydraulic pipeline and the conical sealing surface;

[0009] A transmission cable is electrically connected with the measuring sensor, and is used for data transmission and power supply.

[0010] A monitoring box is electrically connected with the end of the transmission cable away from the measuring sensor, and a display is arranged on the monitoring box, and the display is used for real-time display of the pressure parameter in the hydraulic pipeline.

[0011] Based on the above structure, the principle of the hydraulic pipeline monitoring device is as follows:

[0012] The measuring end of the measuring sensor directly contacts the fluid at the end of the hydraulic pipeline, continuously monitors the pressure in the hydraulic pipeline, and transmits the data signal through the transmission cable, and displays the data signal in real time on the display of the monitoring box, so that the abnormal information can be found in time by the operator, and the running state can be judged intuitively; when the measuring sensor is installed on the hydraulic pipeline, first, the locking nut and the conical sleeve are sequentially sleeved on the hydraulic pipeline, then the hydraulic pipeline is inserted into the pipe opening of the inner pipe connector, then the locking nut is rotated, the locking nut moves along the axial direction of the inner pipe connector, and pushes the conical sleeve to move towards the inner pipe connector, the conical sealing surface is arranged on the inner wall of the inner pipe connector, when the conical sleeve enters the inner pipe connector, the conical sealing surface gradually matches the outer surface of the conical sleeve, so as to prevent the fluid from leaking from the gap between the inner pipe connector and the outer surface of the conical sleeve, with the continuous tightening of the locking nut, the conical sealing surface applies a radial force to the conical sleeve, and the inner wall of the conical sleeve tightly holds the outer wall of the hydraulic pipeline due to the radial contraction, so as to prevent the fluid from leaking along the outer wall of the pipeline; the outer surface of the conical sleeve and the conical sealing surface of the inner pipe connector form a first seal, and the inner surface of the conical sleeve and the outer wall of the hydraulic pipeline are in close contact, forming a second seal, the double seals effectively block the leakage path of the high-pressure fluid, and ensure that there is no leakage in the high-pressure environment, the design adopts a pure mechanical structure and does not need to replace the sealing element regularly, and only needs to loosen the locking nut during maintenance, so as to be convenient for later maintenance.

[0013] Further, the hydraulic pipeline monitoring device in the application, the inner tube connecting piece is provided with a limiting portion on the inner side wall, the limiting portion extends along the radial direction of the inner tube connecting piece, when the hydraulic pipeline is inserted into the inner tube connecting piece, the end of the hydraulic pipeline near the inner tube connecting piece abuts against the limiting portion. As a preferred scheme of the application, the hydraulic pipeline monitoring device in the application, when the hydraulic pipeline is inserted into the inner tube connecting piece, the end of the hydraulic pipeline directly abuts against the limiting portion, which ensures the insertion depth of the hydraulic pipeline, prevents the insertion from being too shallow to cause the conical sleeve not to cover the effective sealing area of the hydraulic pipeline or the insertion from being too deep to press the measurement sensor, and affects the pressure collection accuracy.

[0014] Further, the hydraulic pipeline monitoring device in the application, the hydraulic pipeline is provided with a first sealing element at the abutting position of the limiting portion, and the first sealing element is arranged in the circumferential direction of the inner tube connecting piece. As a preferred scheme of the application, the hydraulic pipeline monitoring device in the application, the first sealing element is used to prevent the fluid from overflowing from the gap between the hydraulic pipeline and the limiting portion, ensures the pressure value in the hydraulic pipeline, and ensures the measurement accuracy of the measurement sensor.

[0015] Further, the hydraulic pipeline monitoring device in the application, the inner wall of the conical sleeve is provided with a group of annular receiving cavities, the annular receiving cavities are arranged in the axial direction and are spaced apart, and the annular receiving cavities are provided with a second sealing element. As a preferred scheme of the application, the hydraulic pipeline monitoring device in the application, the second sealing element cooperates with the radial deformation of the inner wall of the conical sleeve to form an axial multi-layer sealing defense line, prevents the fluid from overflowing from the gap between the conical sleeve and the hydraulic pipeline, ensures the pressure value in the hydraulic pipeline, and ensures the measurement accuracy of the measurement sensor.

[0016] Further, the hydraulic pipeline monitoring device in the application, the sealing connection assembly further comprises an outer sleeve, both ends of the outer sleeve are threadedly connected with the end of the inner tube connecting piece away from the hydraulic pipeline and the measurement end of the measurement sensor, respectively, the inner side wall of the outer sleeve is provided with a blocking portion, the blocking portion extends along the radial direction of the outer sleeve, when the inner tube connecting piece and the measurement sensor are connected with the outer sleeve, the end of the inner tube connecting piece away from the hydraulic pipeline and the measurement end of the measurement sensor abut against the two side surfaces of the blocking portion in the axial direction of the outer sleeve. As a preferred scheme of the application, the hydraulic pipeline monitoring device in the application, the outer sleeve is used to ensure that the measurement end of the measurement sensor is coaxially arranged with the inner tube connecting piece, so as to ensure the measurement accuracy; the blocking portion is used to simultaneously limit the axial positions of the inner tube connecting piece and the measurement sensor, so as to ensure that the relative positions of the inner tube connecting piece and the measurement sensor are stable in the outer sleeve, avoid the connection from being loose due to hydraulic impact or vibration, and ensure the installation accuracy of the measurement sensor and the inner tube connecting piece.

[0017] Further, the hydraulic pipeline monitoring device in the application, the third sealing member is arranged on the outer sleeve in the circumferential direction, and the third sealing member is used for preventing fluid from flowing out from the inner tube connector, the measuring sensor and the abutting position of the stopper, so that the sealing property of the to-be-measured fluid in the sealing connection assembly is ensured.

[0018] Further, the hydraulic pipeline monitoring device in the application, the transmission cable comprises an outer sheath, a power line, a signal transmission line and a pair of reinforcing ribs, the outer sheath is arranged outside the power line, the signal transmission line and the pair of reinforcing ribs, the power line, the signal transmission line and the pair of reinforcing ribs are uniformly and spacedly arranged along the circumferential direction of the outer sheath, and the pair of reinforcing ribs and the power line and the signal transmission line are arranged in a cross shape. As a preferred scheme of the application, the outer sheath is used for isolating the power line and the signal transmission line from the external environment, so that the insulation safety is ensured, the pair of reinforcing ribs bears the axial tension of the transmission cable, so that the power line and the signal transmission line are prevented from being broken due to stress, and the pair of reinforcing ribs and the power line and the signal transmission line are arranged in a cross shape, so that the anti-torsion capability of the transmission cable is improved.

[0019] Further, the hydraulic pipeline monitoring device in the application, the monitoring box is further provided with a buzzer and a mute button, the buzzer is electrically connected with a control circuit in the monitoring box, the buzzer is triggered to send an alarm signal when the pressure parameter in the hydraulic pipeline exceeds a preset threshold range, the mute button is arranged on the monitoring box and is signal-connected with the control circuit, and the mute button is used for starting and stopping the buzzer. As a preferred scheme of the application, the buzzer is used for quickly prompting that the pressure of the hydraulic pipeline exceeds the preset range through a sound signal, and is suitable for a scene (such as a rear of equipment or night work) in which vision is difficult to timely perceive; an operator can pause the buzzer alarm through the mute button, so that continuous noise interference is avoided, and the continuous monitoring of the monitoring box on the pressure is not affected, so that the stability of the hydraulic pipeline operation is ensured.

[0020] The above technical scheme can achieve the following beneficial effects:

[0021] The utility model discloses a hydraulic pipeline monitoring device, through measuring sensor real -time monitoring pressure in hydraulic pipeline and intuitive display on display, the sealing connection subassembly that sets up at the connecting place of hydraulic pipeline and measuring sensor utilizes the radial deformation that conical cover is under pressure generates, forms inside, outside double sealing surface, blocks fluid leakage path, ensures no leakage under high pressure environment, guarantees the stability of measured value, and, only needs to loosen locking nut when overhauling can dismantle, and the later maintenance is convenient, the structure that the transmission cable is designed to contain outer sheath, power cord, signal transmission line and a pair of reinforcing rib that is cross arrangement, promotes the insulating property, the tensile resistance and the torsional rigidity of transmission cable, guarantees data transmission and power supply stability, the setting realizes pressure abnormality alarm of buzzer, ensures the timeliness of being discovered of exception. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is three-dimensional structure schematic view of hydraulic pipeline monitoring device in an embodiment of the application;

[0023] Figure 2 It is the explosion map of sealing connection subassembly in hydraulic pipeline monitoring device in an embodiment of the application;

[0024] Figure 3 It is sectional view of sealing connection subassembly in hydraulic pipeline monitoring device in an embodiment of the application;

[0025] Figure 4 It is Figure 3 The local enlarged view of area A of middle circle;

[0026] Figure 5 It is sectional view of transmission cable in hydraulic pipeline monitoring device in an embodiment of the application.

[0027] In the drawing: 1-hydraulic pipeline; 2-measuring sensor; 3-sealing connection subassembly; 31-inner tube connecting piece; 311-conical sealing surface; 312-limiting portion; 313-first sealing element; 32-conical cover; 320-annular receiving cavity; 321-second sealing element; 33-locking nut; 34-outer sleeve tube; 341-stop portion; 342-third sealing element; 4-transmission cable; 41-outer sheath; 42-power cord; 43-signal transmission line; 44-reinforcing rib; 5-monitoring box; 51-display; 52-buzzer; 53-silencing button. DETAILED DESCRIPTION

[0028] As Figure 1 , 2 , 3, 4 show, a kind of hydraulic pipeline monitoring device, for being installed in series on hydraulic pipeline 1, real-time monitoring pressure in hydraulic pipeline 1, including:

[0029] A measuring sensor 2 is sealingly installed at the end of the hydraulic pipeline 1, and is used to monitor the pressure parameter in the hydraulic pipeline 1 in real time.

[0030] A sealing connection assembly 3 is arranged at the connection between the hydraulic pipeline 1 and the measuring sensor 2, and sealingly connects the hydraulic pipeline 1 and the measuring sensor 2. The sealing connection assembly 3 comprises an inner pipe connector 31, a conical sleeve 32 and a locking nut 33. The hydraulic pipeline 1 is inserted into the pipe opening of the inner pipe connector 31. The pipe opening of the inner pipe connector 31 is provided with a conical sealing surface 311 which is adapted to the conical sleeve 32. The conical sleeve 32 and the locking nut 33 are sequentially sleeved on the hydraulic pipeline 1. The conical sleeve 32 is located between the inner pipe connector 31 and the locking nut 33. The locking nut 33 is threadedly connected with the inner pipe connector 31. When the locking nut 33 axially presses the conical sleeve 32, the conical sleeve 32 is compressed in the axial direction and deformed in the radial direction. The inner and outer surfaces of the conical sleeve 32 are respectively in contact with the outer surface of the hydraulic pipeline 1 and the conical sealing surface 311.

[0031] A transmission cable 4 is electrically connected with the measuring sensor 2, and is used for data transmission and power supply.

[0032] A monitoring box 5 is electrically connected with the end of the transmission cable 4 which is away from the measuring sensor 2. The monitoring box 5 is provided with a display 51 which is used to display the pressure parameter in the hydraulic pipeline 1 in real time.

[0033] Based on the above structure, the principle of the hydraulic pipeline monitoring device is as follows:

[0034] The measuring end of the measuring sensor 2 directly contacts the fluid at the end of the hydraulic pipeline 1, continuously monitors the pressure in the hydraulic pipeline 1, and transmits a data signal through the transmission cable 4 to be displayed in real time on the display 51 on the monitoring box 5, so that the operating personnel can find abnormal information in time and intuitively judge the operating state; when the measuring sensor 2 is installed on the hydraulic pipeline 1, first, the locking nut 33 and the conical sleeve 32 are sequentially sleeved on the hydraulic pipeline 1, then the hydraulic pipeline 1 is inserted into the pipe opening of the inner pipe connecting piece 31, then the locking nut 33 is rotated, the locking nut 33 moves along the axial direction of the inner pipe connecting piece 31, pushes the conical sleeve 32 to move towards the inner pipe connecting piece 31, the conical sealing surface 311 is arranged on the inner wall of the inner pipe connecting piece 31, when the conical sleeve 32 enters the inner pipe connecting piece 31, the conical sealing surface 311 gradually fits the outer surface of the conical sleeve 32 to prevent fluid from leaking from the gap between the inner pipe connecting piece 31 and the outer surface of the conical sleeve 32, as the locking nut 33 is continuously tightened, the conical sealing surface 311 exerts a radial force on the conical sleeve 32, the inner wall of the conical sleeve 32 shrinks tightly around the outer wall of the hydraulic pipeline 1 to prevent fluid from seeping along the outer wall of the pipeline; the outer surface of the conical sleeve 32 and the conical sealing surface 311 of the inner pipe connecting piece 31 form a first seal, the inner surface of the conical sleeve 32 and the outer wall of the hydraulic pipeline 1 are in close contact to form a second seal, the double sealing effectively blocks the leakage path of the high-pressure fluid, ensuring no leakage in the high-pressure environment, the design uses a pure mechanical structure without the need for regular replacement of sealing elements, and during maintenance, the locking nut 33 can be loosened for disassembly, facilitating later maintenance. The measuring sensor 2 uses a pressure transmitter.

[0035] In the embodiment, a limiting portion 312 is arranged on the inner side wall of the inner pipe connecting piece 31, and the limiting portion 312 extends along the radial direction of the inner pipe connecting piece 31; when the hydraulic pipeline 1 is inserted into the inner pipe connecting piece 31, the end of the hydraulic pipeline 1 near the inner pipe connecting piece 31 abuts against the limiting portion 312. When the hydraulic pipeline 1 is inserted into the inner pipe connecting piece 31, the end of the hydraulic pipeline 1 directly abuts against the limiting portion 312, ensuring the insertion depth of the hydraulic pipeline 1, preventing the conical sleeve 32 from not covering the effective sealing area of the hydraulic pipeline 1 due to shallow insertion or the measuring sensor 2 from being squeezed due to deep insertion, and affecting the pressure collection accuracy.

[0036] In the embodiment, a first sealing element 313 is arranged at the abutting position of the hydraulic pipeline 1 and the limiting portion 312, and the first sealing element 313 is arranged in the circumferential direction of the inner pipe connecting piece 31. The first sealing element 313 is used to prevent fluid from overflowing from the gap between the hydraulic pipeline 1 and the limiting portion 312, ensure the pressure value in the hydraulic pipeline 1, and ensure the measurement accuracy of the measuring sensor 2. The first sealing element 313 uses an O-shaped rubber sealing ring.

[0037] In the embodiment, the inner wall of the conical sleeve 32 is provided with a group of annular receiving cavities 320, which are arranged axially at intervals along the conical sleeve 32, and the annular receiving cavities 320 are provided with second sealing members 321. The second sealing members 321 cooperate with the radial deformation of the inner wall of the conical sleeve 32 to form an axial multi-layer sealing defense line, prevent fluid from overflowing from the gap between the conical sleeve 32 and the hydraulic pipeline 1, ensure the pressure value in the hydraulic pipeline 1, and ensure the measurement accuracy of the measurement sensor 2. The number of the group of annular receiving cavities 320 is three, and the number of the second sealing members 321 is three, and the second sealing members 321 are O-shaped rubber sealing rings.

[0038] In the embodiment, the sealing connection assembly 3 further comprises an outer sleeve 34, the two ends of the outer sleeve 34 are respectively threadedly connected with the end of the inner tube connector 31 away from the hydraulic pipeline 1 and the measurement end of the measurement sensor 2, the inner side wall of the outer sleeve 34 is provided with a stop portion 341, the stop portion 341 is arranged in a radial direction along the outer sleeve 34, and when the inner tube connector 31 and the measurement sensor 2 are connected with the outer sleeve 34, the end of the inner tube connector 31 away from the hydraulic pipeline 1 and the measurement end of the measurement sensor 2 are respectively arranged on the two side surfaces of the stop portion 341 in an axial direction of the outer sleeve 34. The outer sleeve 34 is used to ensure that the measurement end of the measurement sensor 2 is coaxially arranged with the inner tube connector 31, so as to ensure the measurement accuracy; and the stop portion 341 is used to simultaneously limit the axial positions of the inner tube connector 31 and the measurement sensor 2, so as to ensure that the relative positions of the two are stable in the outer sleeve 34, avoid loosening of the connection caused by hydraulic impact or vibration, and ensure the accuracy of the installation positions of the measurement sensor 2 and the inner tube connector 31.

[0039] In the embodiment, the end of the inner tube connector 31 away from the hydraulic pipeline 1 and the measurement end of the measurement sensor 2 are respectively provided with third sealing members 342 at the positions where the two ends abut against the stop portion 341, and the third sealing members 342 are arranged in a circumferential direction along the outer sleeve 34. The third sealing members 342 are used to prevent fluid from flowing out from the positions where the inner tube connector 31, the measurement sensor 2 and the stop portion 341 abut against each other, and ensure the sealing of the fluid to be measured in the sealing connection assembly 3. The third sealing members 342 are O-shaped rubber sealing rings.

[0040] In the embodiment, as shown in FIG. 4, the inner tube connector 31 is provided with a plurality of annular grooves 311, which are arranged at intervals along the inner tube connector 31, and the annular grooves 311 are provided with fourth sealing members 312. Figure 5As shown, the transmission cable 4 comprises an outer sheath 41, a power line 42, a signal transmission line 43 and a pair of reinforcing ribs 44, the outer sheath 41 is sleeved outside the power line 42, the signal transmission line 43 and the pair of reinforcing ribs 44, the power line 42, the signal transmission line 43 and the pair of reinforcing ribs 44 are uniformly spaced along the circumference of the outer sheath 41, and the pair of reinforcing ribs 44 and the power line 42 and the signal transmission line 43 are arranged in a cross shape. The outer sheath 41 is used to isolate the power line 42, the signal transmission line 43 and the external environment, and ensure insulation safety; the pair of reinforcing ribs 44 bear the axial tension of the transmission cable 4, so as to avoid the power line 42 and the signal transmission line 43 from being broken due to stress, and the pair of reinforcing ribs 44 and the power line 42 and the signal transmission line 43 are cross-shaped, forming a symmetrical structure, which improves the anti-torsion capability of the transmission cable 4. The reinforcing rib 44 is made of stainless steel wire.

[0041] In the embodiment, the monitoring box 5 is further provided with a buzzer 52 and a mute button 53, the buzzer 52 is electrically connected with a control circuit in the monitoring box 5, when the pressure parameter in the hydraulic pipeline 1 exceeds the preset threshold range, the buzzer 52 is triggered to send an alarm signal, the mute button 53 is arranged on the monitoring box 5, the mute button 53 is signal-connected with the control circuit, and the mute button 53 is used for starting and stopping the buzzer 52. The buzzer 52 quickly prompts that the pressure of the hydraulic pipeline 1 exceeds the preset range through a sound signal, and is suitable for scenes (such as the back of the equipment, night work) that are difficult to be perceived in time; the operator can pause the buzzer 52 alarm through the mute button 53, so as to avoid continuous noise interference, and does not affect the continuous monitoring of the monitoring box 5 on the pressure, so as to ensure the stability of the hydraulic pipeline 1 operation. The control circuit adopts a PLC control circuit.

[0042] The technical principles of the utility model are described above in combination with specific embodiments, and these descriptions are only for explaining the principles of the utility model, and cannot be explained as the limitation of the protection scope of the utility model in any way. Based on the explanation herein, the person skilled in the art can think of other specific embodiments of the utility model without creative labor, and these embodiments will fall within the protection scope of the utility model.

Claims

1. A hydraulic line monitoring device for being installed in series on a hydraulic line (1) for monitoring the pressure in the hydraulic line (1) in real time, characterized in that: The utility model relates to a kind of hydraulic pressure pipe real-time monitoring device, including: Measurement sensor (2), the measurement end of the measurement sensor (2) is sealingly installed at the end of hydraulic pipeline, and the measurement sensor (2) is used to monitor the pressure parameter in real time in hydraulic pipeline; Sealing connection assembly (3), the sealing connection assembly (3) is located at the connection of hydraulic pipeline (1) and measurement sensor (2), and the sealing connection assembly (3) sealingly communicates hydraulic pipeline (1) and measurement sensor (2), and the sealing connection assembly (3) includes: inner tube connecting piece (31), conical sleeve (32), lock nut (33), the hydraulic pipeline (1) is inserted at the pipe orifice of inner tube connecting piece (31), the pipe orifice of inner tube connecting piece (31) is equipped with the conical sealing surface (311) suitable for conical sleeve (32), conical sleeve (32), lock nut (33) are sequentially set on hydraulic pipeline (1), and conical sleeve (32) is located between inner tube connecting piece (31) and lock nut (33), and lock nut (33) is threadedly connected with inner tube connecting piece (31), when the lock nut (33) is axially compressed conical sleeve (32), conical sleeve (32) is compressed and generates radial deformation along the axial direction, and the inner and outer sides of conical sleeve (32) are respectively attached to the outer side of hydraulic pipeline (1) and conical sealing surface (311); Transmission cable (4), the transmission cable (4) is electrically connected with measurement sensor (2), and the transmission cable (4) is used for data transmission and power supply; Monitoring box (5), the monitoring box (5) is electrically connected with the end of transmission cable (4) away from measurement sensor (2), and the monitoring box (5) is equipped with display (51), and the display (51) is used to display the pressure parameter in real time in hydraulic pipeline (1).

2. A hydraulic line monitoring device according to claim 1, characterized in that: The inner side wall of the inner tube connecting piece (31) is equipped with limiting portion (312), the limiting portion (312) is arranged along the radial direction of inner tube connecting piece (31), when the hydraulic pipeline (1) is inserted in inner tube connecting piece (31), the end portion near the side of inner tube connecting piece (31) of the hydraulic pipeline (1) is abutted on limiting portion (312).

3. A hydraulic line monitoring device according to claim 2, characterized in that: The abutted place of the hydraulic pipeline (1) and limiting portion (312) is equipped with first sealing element (313), and the first sealing element (313) is arranged along the circumference of inner tube connecting piece (31).

4. The hydraulic line monitoring device of claim 1, wherein: The inner wall of the conical sleeve (32) is equipped with a group of annular receiving cavities (320), and a group of the annular receiving cavities (320) are arranged axially spaced apart along the conical sleeve (32), and the annular receiving cavities (320) are equipped with second sealing element (321).

5. The hydraulic line monitoring device of claim 1, wherein: The sealing connection assembly (3) further comprises an outer sleeve (34), two ends of the outer sleeve (34) are respectively threadedly connected with the inner tube connector (31) away from one end of the hydraulic pipeline (1) and the measuring end of the measuring sensor (2), a blocking portion (341) is arranged on the inner side wall of the outer sleeve (34), the blocking portion (341) is arranged in a radial direction of the outer sleeve (34), when the inner tube connector (31) and the measuring sensor (2) are connected with the outer sleeve (34), the end of the inner tube connector (31) away from the hydraulic pipeline (1) and the measuring end of the measuring sensor (2) are respectively arranged on two side surfaces of the blocking portion (341) in an axial direction of the outer sleeve (34).

6. A hydraulic line monitoring device according to claim 5, characterized in that: The end of the inner tube connector (31) away from the hydraulic pipeline (1) and the measuring end of the measuring sensor (2) are respectively provided with a third sealing member (342) at the blocking portion (341), the third sealing member (342) is arranged in a circumferential direction of the outer sleeve (34).

7. The hydraulic line monitoring device of claim 1, wherein: The transmission cable (4) comprises an outer sheath (41), a power line (42), a signal transmission line (43) and a pair of reinforcing ribs (44), the outer sheath (41) is arranged outside the power line (42), the signal transmission line (43) and the pair of reinforcing ribs (44), the power line (42), the signal transmission line (43) and the pair of reinforcing ribs (44) are uniformly and spacedly arranged in a circumferential direction of the outer sheath (41), the pair of reinforcing ribs (44) and the power line (42) and the signal transmission line (43) are arranged in a cross shape.

8. The hydraulic line monitoring device of claim 1, wherein: The monitoring box (5) is further provided with a buzzer (52) and a mute button (53), the buzzer (52) is electrically connected with a control circuit in the monitoring box (5), when a pressure parameter in the hydraulic pipeline (1) exceeds a preset threshold range, the buzzer (52) is triggered to send an alarm signal, the mute button (53) is arranged on the monitoring box (5), the mute button (53) is signal-connected with the control circuit, and the mute button (53) is used for starting and stopping the buzzer (52).

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