Intelligent monitoring device for gas pipe network

Abstract

The invention discloses a gas pipe network intelligent monitoring device which comprises two fixing assemblies, an adjusting mechanism and an ultrasonic monitoring mechanism, the number of the fixing assemblies is two, the adjusting mechanism is arranged between the two fixing assemblies, the adjusting mechanism is provided with the ultrasonic monitoring mechanism, and the ultrasonic monitoring mechanism is arranged on the adjusting mechanism. The fixing assembly comprises a first fixing seat, a second fixing seat and a clamping mechanism, one end of the first fixing seat is rotationally connected with one end of the second fixing seat, the other end of the first fixing seat is fixedly connected with the other end of the second fixing seat in a clamped mode through a first clamping plate, arc-shaped clamping grooves are formed in the first fixing seat and the second fixing seat, and the two arc-shaped clamping grooves can form an annular fixing groove; a plurality of clamping mechanisms are arranged in the annular fixing groove in a circumferential sliding mode, and the adjusting mechanism comprises a first adjusting clamping base and a second adjusting clamping base.

Description

Technical Field

[0001] The present invention relates to the technical field of gas pipeline network monitoring, and in particular to an intelligent monitoring device for a gas pipeline network. Background Art

[0002] Gas pipeline network refers to a gas transmission and distribution equipment consisting of gas supply trunk pipes, branch pipes and related facilities. These facilities usually include gate stations, gas storage facilities, pressure regulating devices, transmission and distribution pipelines, metering devices, management facilities and monitoring systems. Its main function is to safely and efficiently transport gas from the gas source to various user ends to meet the gas needs of industrial, commercial and civil fields. With the acceleration of urbanization, the safety and stability of gas pipeline networks, as an important part of urban infrastructure, are increasingly valued.

[0003] When laying gas pipelines, many places need to be bent to adapt to the layout and direction of buildings. The bent parts of the pipelines are prone to scaling due to the change in flow velocity between the inside and outside. The gas scaling inspection method generally requires the use of professional instruments for detection, such as ultrasonic detectors, endoscopes, etc., and the endoscope needs to remove the detachable part of the gas pipe before using the endoscope for detection, which is more troublesome. The ultrasonic detector can realize detection without disassembling the pipeline, but the ultrasonic detector will vibrate during detection, and the traditional ultrasonic detector is generally fixed on the pipeline during installation, which leads to the loosening of the fixed part of the ultrasonic detector during the vibration process of the ultrasonic detector, thereby affecting the detection, and for gas pipes with bends at different angles and different pipe diameters, its installation is more difficult, thereby affecting the accuracy of the detection results.

[0004] Therefore, it is necessary to provide a gas pipeline network intelligent monitoring device to solve the problems raised in the above background technology. Summary of the invention

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a gas pipe network intelligent monitoring device, comprising a fixing component, an adjusting mechanism and an ultrasonic monitoring mechanism, wherein the fixing components are configured as two, an adjusting mechanism is arranged between the two fixing components, and an ultrasonic monitoring mechanism is arranged on the adjusting mechanism;

[0006] The fixing assembly comprises a fixing seat 1, a fixing seat 2 and a clamping mechanism, wherein the fixing seat 1 is rotatably connected to the fixing seat 2 at one end and the other end is fixedly clamped by a clamping plate 1, and the fixing seat 1 and the fixing seat 2 are both provided with arc-shaped clamping grooves, and the two arc-shaped clamping grooves can form an annular fixing groove, and a plurality of clamping mechanisms are provided in the annular fixing groove in a circular sliding manner;

[0007] The adjustment mechanism comprises an adjustment card seat 1 and an adjustment card seat 2, wherein two first support rods are fixedly arranged on the fixed seat 1, a second support rod is slidably arranged in the first support rod, an output end of the second support rod is hinged to the adjustment card seat 1, two third support rods are hinged to the fixed seat 2, a fourth support rod is slidably arranged in the third support rod, an output end of the fourth support rod is hinged to the adjustment card seat 2, and the adjustment card seat 1 and the adjustment card seat 2 can be fixedly connected by two second clamping plates;

[0008] Furthermore, a clamping mechanism is provided between the first support rod and the second support rod, and between the third support rod and the fourth support rod.

[0009] Preferably, the clamping mechanism includes a sliding rod, a limit block, a spring support rod, a first pressure rod and a second pressure rod, wherein the sliding rod is slidably arranged on the annular fixing groove, the output end of the sliding rod is fixedly provided with the first pressure rod, the limiting block is fixedly provided on the sliding rod, the two ends of the limiting block are symmetrically hinged with spring support rods, the output end of the spring support rod is fixedly provided with the second pressure rod, and an elastic pull pad is fixedly provided between the two second pressure rods.

[0010] Preferably, two inclined surfaces are symmetrically arranged on the limit block, and the two inclined surfaces can limit the deflection angles of the two spring support rods.

[0011] Preferably, the first fixing seat is provided with a semi-arc-shaped rotating groove 1, in which a driving ring 1 is rotatably arranged, the second fixing seat is provided with a semi-arc-shaped rotating groove 2, in which a driving ring 2 is rotatably arranged, and the first rotating groove and the second rotating groove can be fitted together to form a circular driving groove, and the first driving ring and the second driving ring can be fitted together to form a driving disk;

[0012] The driving disk is provided with a plurality of arc-shaped oblique grooves in a circumferential manner;

[0013] A guide rod is fixedly arranged on the slide rod, and the guide rod is inserted into the inclined groove and slides along the inclined groove.

[0014] Preferably, a driving rod is fixedly arranged on the driving ring 1, and a slot for the driving rod to slide is provided on the fixing seat 1;

[0015] A gear ring is fixedly arranged on the outer side of the driving ring 1;

[0016] A gear is rotatably arranged on the fixing seat, and the gear is meshed with the gear ring.

[0017] Preferably, a clamping block is slidably provided on the fixing seat, a spring is provided between the clamping block and the fixing seat, an arc-shaped opening is opened on the side of the clamping block close to the gear, an arc-shaped rack is limitedly slidably provided in the arc-shaped opening, and the arc-shaped rack can mesh with the gear.

[0018] Preferably, the engaging mechanism comprises an engaging seat, a spiral sleeve and an engaging block, wherein a plurality of the engaging seats are respectively fixedly arranged at the output ends of the first support rod and the third support rod, the spiral sleeve is spirally slidably arranged on the engaging seat, a plurality of engaging blocks are fixedly arranged on the engaging seat in a circumferential manner, and the engaging blocks are flexible rubber blocks;

[0019] A push ring is fixedly arranged on the spiral sleeve, and an inclined surface is arranged on the engaging block. The push ring can push the engaging block to deflect.

[0020] Preferably, a hydraulic telescopic rod 1 is fixedly provided on the adjusting seat 1, and a hydraulic telescopic rod 2 is fixedly provided on the adjusting seat 2. The output ends of the hydraulic telescopic rod 1 and the hydraulic telescopic rod 2 are both provided with ultrasonic monitoring mechanisms.

[0021] Compared with the prior art, the present invention provides a gas pipeline network intelligent monitoring device, which has the following beneficial effects:

[0022] In the present invention, the clamping mechanism can be used to fix the fixing assembly on the gas pipes of different diameters, and the arrangement of the first support rod, the second support rod, the third support rod and the fourth support rod allows the adjustment mechanism to be deflected at multiple angles, thereby ensuring that the ultrasonic monitoring mechanism can be stably arranged on the gas pipe and that the ultrasonic monitoring mechanism can face the bending part of the gas pipe, thereby ensuring the accuracy of the monitoring result. In addition, by means of the two spring support rods arranged in the clamping mechanism, when the first pressure rod is pressed against the surface of the gas pipe, the two second pressure rods will be further pressed against the surface of the gas pipe under the action of the spring support rods, and when the ultrasonic monitoring mechanism vibrates during the detection process and causes the first pressure rod to become loose, the second pressure rod can always be pressed against the surface of the gas pipe, thereby ensuring that the fixing assembly is not affected by the vibration, thereby further ensuring the stability of the ultrasonic monitoring mechanism and the accuracy of the monitoring result. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the fixing component in the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the driving ring 1 and the driving ring 2 in the present invention;

[0026] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the middle part A;

[0027] Figure 5 It is a structural schematic diagram of the clamping mechanism in the present invention;

[0028] Figure 6 It is a structural schematic diagram of the locking mechanism in the present invention;

[0029] In the figure: 1, fixing assembly; 11, fixing seat 1; 111, first support rod; 112, second support rod; 113, gear; 114, clamping block; 115, arc-shaped rack; 12, fixing seat 2; 121, second support rod; 122, fourth support rod; 13, clamping mechanism; 131, sliding rod; 132, limiting block; 133, spring support rod; 134, first pressure rod; 135, second pressure rod; 136, elastic pad; 137, guide rod; 14, clamping plate 1; 15, driving ring 1; 151, driving rod; 152, gear ring; 16, driving ring 2; 17, inclined groove; 2, adjusting mechanism; 21, adjusting clamping seat 1; 22, adjusting clamping seat 2; 23, clamping plate 2; 3, ultrasonic detection mechanism; 4, clamping mechanism; 41, clamping seat; 42, spiral sleeve; 43, clamping block. DETAILED DESCRIPTION

[0030] See also Figure 1 to Figure 6 In an embodiment of the present invention, a gas pipe network intelligent monitoring device includes a fixing component 1, an adjusting mechanism 2 and an ultrasonic monitoring mechanism 3, wherein the fixing component 1 is configured as two, an adjusting mechanism 2 is arranged between the two fixing components 1, and an ultrasonic monitoring mechanism 3 is arranged on the adjusting mechanism 2;

[0031] The fixing assembly 1 includes a fixing seat 11, a fixing seat 2 12 and a clamping mechanism 13, wherein the fixing seat 11 is rotatably connected to the fixing seat 2 12 at one end and the other end is fixedly clamped by a clamping plate 14, and the fixing seat 1 11 and the fixing seat 2 12 are both provided with an arc-shaped clamping groove, and the two arc-shaped clamping grooves can form an annular fixing groove, and a plurality of clamping mechanisms 13 are provided in the annular fixing groove in a circular sliding manner;

[0032] The adjustment mechanism 2 includes an adjustment card seat 1 21 and an adjustment card seat 2 22, wherein two first support rods 111 are fixedly arranged on the fixed seat 1 11, a second support rod 112 is slidably arranged in the first support rod 111, and an output end of the second support rod 112 is hinged to the adjustment card seat 1 21, and two third support rods 121 are hinged to the fixed seat 2 12, a fourth support rod 122 is slidably arranged in the third support rod 121, and an output end of the fourth support rod 122 is hinged to the adjustment card seat 2 22, and the adjustment card seat 1 21 and the adjustment card seat 2 22 can be fixedly connected by two clamping plates 2 23;

[0033] A clamping mechanism 4 is provided between the first support rod 111 and the second support rod 112 as well as between the third support rod 121 and the fourth support rod 122;

[0034] The clamping mechanism 13 includes a slide bar 131, a limit block 132, a spring support rod 133, a first pressure rod 134 and a second pressure rod 135, wherein the slide bar 131 is slidably arranged on the annular fixing groove, the output end of the slide bar 131 is fixedly provided with the first pressure rod 134, the slide bar 131 is fixedly provided with a limit block 132, the two ends of the limit block 132 are symmetrically hinged with spring support rods 133, the output end of the spring support rod 133 is fixedly provided with a second pressure rod 135, and an elastic pull pad 136 is fixedly provided between the two second pressure rods 135;

[0035] The limit block 132 is symmetrically provided with two inclined surfaces, and the two inclined surfaces can limit the deflection angle of the two spring support rods 133;

[0036] During implementation, the slide bar 131 is driven to slide so that the clamping mechanism 13 is entirely close to the gas pipe. During this process, the second pressure rod 135 and the elastic pad 136 will first contact the gas pipe. Then, under the continuous thrust of the slide bar 131, the elastic pad 136 can be elastically stretched and completely fit on the surface of the gas pipe. Then, the slide bar 131 continues to slide until the first pressure rod 134 fits on the back of the elastic pad 136. During this process, the spring support rod 133 is deflected and compressed by the force. Then, when multiple first pressure rods 134 When the fixing assembly 1 is pressed against the gas pipe, that is, when the fixing assembly 1 is fixed on the surface of the gas pipe as a whole, the second pressure rod 135 can have a force to approach the surface of the gas pipe under the action of the spring support rod 133, that is, when the first pressure rod 134 is loosened during a long period of fixation or when the ultrasonic monitoring mechanism 3 vibrates, the second pressure rod 135 can further ensure that the fixing assembly 1 as a whole will not be affected, that is, it is always firmly set on the gas pipe, thereby ensuring that the ultrasonic monitoring mechanism 3 can always remain stable, further ensuring the accuracy of the monitoring result;

[0037] The fixing seat 11 is provided with a semi-arc-shaped rotating groove 1, in which a driving ring 15 is rotatably arranged; the fixing seat 2 12 is provided with a semi-arc-shaped rotating groove 2, in which a driving ring 2 16 is rotatably arranged; the rotating groove 1 and the rotating groove 2 can be fitted together to form a circular driving groove, and the driving ring 15 and the driving ring 2 16 can be fitted together to form a driving disk.

[0038] During implementation, the two fixing components 1 are fixedly arranged on both sides of the gas pipe elbow, during this process, the fixing seat 11 and the fixing seat 2 12 are placed on both sides of the gas pipe, and the adjusting seat 1 21 is moved to the outside of the elbow, and the adjusting seat 2 22 is moved to the inside of the elbow, and then the fixing seat 11 and the fixing seat 2 12 are fixedly connected by the clamping plate 14, and the driving disk composed of the driving ring 15 and the driving ring 2 16 is driven to rotate, so that the multiple clamping mechanisms 13 slide, so that the first pressure rod 134, the second pressure rod 135 and the elastic pad 136 are tightly attached to the surface of the gas pipe, that is, the fixing component 1 is stabilized on the gas pipe by the multiple clamping mechanisms 13, and then the adjusting seat 1 21 and the adjusting seat 2 22 are fixedly connected by the clamping plate 23, during this process, the second support rod 112 slides along the first support rod 111 and deflects along the adjusting seat 1 21, and the fourth support rod 122 deflects along the third support rod 121 slides, and the fourth support rod 122 deflects along the adjusting card seat 22, and the third support rod 121 deflects along the fixing seat 2 12, that is, the deflection angle of the adjusting mechanism 2 is adjusted according to the bending angle of the bending part of the gas pipe, to ensure that the ultrasonic monitoring mechanism 3 arranged on the adjusting mechanism 2 can face the bending part of the gas pipe, that is, to ensure the accuracy of detection, after the position adjustment of the first support rod 111 and the second support rod 112 and the third support rod 121 and the fourth support rod 122 is completed, the second support rod 112 and the fourth support rod 122 are clamped by the clamping mechanism 4, that is, the position of the adjusting mechanism 2 is fixed, and then the ultrasonic monitoring mechanism 3 is used to monitor the scale layer of the bending part of the gas pipe, and through this installation method, the ultrasonic monitoring mechanism 3 can be installed on the gas pipe with any bending angle, when encountering gas pipes of different diameters, the ultrasonic monitoring mechanism 3 can be firmly fixed on the gas pipe, thereby ensuring the accuracy of the monitoring result.

[0039] In this embodiment, Figure 2 , Figure 3 and Figure 4 The driving disk is provided with a plurality of arc-shaped inclined grooves 17 in a circumferential manner;

[0040] A guide rod 137 is fixedly disposed on the slide bar 131, and the guide rod 137 is inserted into the inclined groove 17 and slides along the inclined groove 17;

[0041] A driving rod 151 is fixedly disposed on the driving ring 15, and a slot for the driving rod 151 to slide is provided on the fixing seat 11;

[0042] A gear ring 152 is fixedly disposed on the outer side of the driving ring 15;

[0043] A gear 113 is rotatably disposed on the fixing seat 11, and the gear 113 is meshed with the gear ring 152;

[0044] A clamping block 114 is slidably provided on the fixing seat 11, a spring is provided between the clamping block 114 and the fixing seat 11, an arc-shaped opening is provided on a side of the clamping block 114 close to the gear 113, an arc-shaped rack 115 is limitedly slidably provided in the arc-shaped opening, and the arc-shaped rack 115 can mesh with the gear 113.

[0045] During implementation, when it is necessary to drive the driving ring 15 to rotate, that is, the entire driving disk rotates, the clamping block 114 is moved to make the arc-shaped rack 115 disengage from the gear 113, and then the driving rod 151 is used to drive the driving ring 15 to rotate, so that the multiple clamping mechanisms 13 are close to the gas pipe to fix the fixing component 1 on the gas pipe, and then when the driving ring 15 has completed its rotation, the clamping block 114 is reset, and the arc-shaped rack 115 is clamped to the gear 113 under the action of the spring, so that the gear 113 no longer rotates, thereby making the driving ring 15 stuck, and in addition, the arc-shaped rack 115 is slidably set in the arc-shaped mouth, so that no matter how the gear 113 rotates, the arc-shaped rack 115 can be clamped on the gear 113.

[0046] In this embodiment, Figure 6 The engaging mechanism 4 includes an engaging seat 41, a spiral sleeve 42 and an engaging block 43, wherein a plurality of the engaging seats 41 are respectively fixedly arranged at the output ends of the first support rod 111 and the third support rod 121, the spiral sleeve 42 is spirally slidably arranged on the engaging seat 41, and a plurality of engaging blocks 43 are fixedly arranged on the engaging seat 41 in a circumferential manner, and the engaging blocks 43 are flexible rubber blocks;

[0047] A push ring is fixedly provided on the spiral sleeve 42 , and an inclined surface is provided on the engaging block 43 . The push ring can push the engaging block 43 to deflect.

[0048] In this embodiment, Figure 1 A hydraulic telescopic rod 1 is fixedly arranged on the adjusting seat 1 21 , and a hydraulic telescopic rod 2 is fixedly arranged on the adjusting seat 2 22 . An ultrasonic monitoring mechanism 3 is arranged at the output ends of both the hydraulic telescopic rod 1 and the hydraulic telescopic rod 2.

[0049] In summary, when the present invention is implemented, the clamping mechanism 13 can be used to fix the fixing assembly 1 on gas pipes of different diameters, and the first support rod 111, the second support rod 112, the third support rod 121 and the fourth support rod 122 are arranged, so that the adjusting mechanism 2 can be deflected at multiple angles, that is, it is ensured that the ultrasonic monitoring mechanism 3 can be stably arranged on the gas pipe, and the ultrasonic monitoring mechanism 3 can face the bending part of the gas pipe, thereby ensuring the accuracy of the monitoring result. In addition, through the two spring support rods 133 arranged in the clamping mechanism 13, when the first pressure rod 134 is pressed against the surface of the gas pipe, the two second pressure rods 135 will be further pressed against the surface of the gas pipe under the action of the spring support rods 133, and when the ultrasonic monitoring mechanism 3 vibrates during the detection process so that the first pressure rod 134 becomes loose, the second pressure rod 135 can always be pressed against the surface of the gas pipe, that is, it is ensured that the fixing assembly is not affected by the vibration, that is, the stability of the ultrasonic monitoring mechanism 3 and the accuracy of the monitoring result are further guaranteed.

[0050] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas network intelligent monitoring device, characterized in that: It comprises a fixing component (1), an adjusting mechanism (2) and an ultrasonic monitoring mechanism (3), wherein the fixing component (1) is configured as two, an adjusting mechanism (2) is arranged between the two fixing components (1), and the ultrasonic monitoring mechanism (3) is arranged on the adjusting mechanism (2); The fixing assembly (1) comprises a fixing seat 1 (11), a fixing seat 2 (12) and a clamping mechanism (13), wherein the fixing seat 1 (11) is rotatably connected to the fixing seat 2 (12) at one end and the other end is fixedly clamped by a clamping plate 1 (14), and the fixing seat 1 (11) and the fixing seat 2 (12) are both provided with arc-shaped clamping grooves, and the two arc-shaped clamping grooves can form an annular fixing groove, and a plurality of clamping mechanisms (13) are provided in the annular fixing groove in a circular sliding manner; The adjustment mechanism (2) comprises an adjustment seat 1 (21) and an adjustment seat 2 (22), wherein two first support rods (111) are fixedly arranged on the fixed seat 1 (11), a second support rod (112) is slidably arranged in the first support rod (111), an output end of the second support rod (112) is hinged to the adjustment seat 1 (21), two third support rods (121) are hinged to the fixed seat 2 (12), a fourth support rod (122) is slidably arranged in the third support rod (121), an output end of the fourth support rod (122) is hinged to the adjustment seat 2 (22), and the adjustment seat 1 (21) and the adjustment seat 2 (22) can be fixedly connected by two second clamping plates (23); Furthermore, a locking mechanism (4) is provided between the first support rod (111) and the second support rod (112), and between the third support rod (121) and the fourth support rod (122).

2. A gas pipe network intelligent monitoring device according to claim 1, characterized in that: The clamping mechanism (13) comprises a sliding rod (131), a limiting block (132), a spring support rod (133), a first pressure rod (134) and a second pressure rod (135), wherein the sliding rod (131) is slidably arranged on the annular fixing groove, the output end of the sliding rod (131) is fixedly provided with the first pressure rod (134), the limiting block (132) is fixedly provided on the sliding rod (131), the two ends of the limiting block (132) are symmetrically hinged with the spring support rod (133), the output end of the spring support rod (133) is fixedly provided with the second pressure rod (135), and an elastic pull pad (136) is fixedly provided between the two second pressure rods (135).

3. A gas pipe network intelligent monitoring device according to claim 2, characterized in that: Two inclined surfaces are symmetrically arranged on the limit block (132), and the two inclined surfaces can limit the deflection angles of the two spring support rods (133).

4. A gas pipe network intelligent monitoring device according to claim 2, characterized in that: The fixing seat 1 (11) is provided with a semi-arc-shaped rotating groove 1, in which a driving ring 1 (15) is rotatably arranged, the fixing seat 2 (12) is provided with a semi-arc-shaped rotating groove 2, in which a driving ring 2 (16) is rotatably arranged, and the rotating groove 1 and the rotating groove 2 can be fitted together to form a circular driving groove, and the driving ring 1 (15) and the driving ring 2 (16) can be fitted together to form a driving disk; The driving disk is provided with a plurality of arc-shaped inclined grooves (17) in a circumferential manner; A guide rod (137) is fixedly arranged on the sliding rod (131), and the guide rod (137) is inserted into the inclined groove (17) and slides along the inclined groove (17).

5. A gas network intelligent monitoring device according to claim 4, characterized in that: A driving rod (151) is fixedly arranged on the driving ring 1 (15), and a slot for the driving rod (151) to slide is provided on the fixing seat 1 (11); A gear ring (152) is fixedly disposed on the outer side of the driving ring 1 (15); A gear (113) is rotatably provided on the fixing seat (11), and the gear (113) is meshed with the gear ring (152).

6. A gas pipe network intelligent monitoring device according to claim 5, characterized in that: A clamping block (114) is slidably disposed on the fixing seat (11), a spring is disposed between the clamping block (114) and the fixing seat (11), an arc-shaped opening is provided on a side of the clamping block (114) close to the gear (113), an arc-shaped rack (115) is limitedly slidably disposed in the arc-shaped opening, and the arc-shaped rack (115) can mesh with the gear (113).

7. The intelligent monitoring device for a gas pipe network according to claim 1, characterized in that: The engaging mechanism (4) comprises an engaging seat (41), a spiral sleeve (42) and an engaging block (43), wherein a plurality of the engaging seats (41) are respectively fixedly arranged at the output ends of the first support rod (111) and the third support rod (121), the spiral sleeve (42) is spirally slidably arranged on the engaging seat (41), and a plurality of engaging blocks (43) are fixedly arranged in a circular shape on the engaging seat (41), and the engaging blocks (43) are flexible rubber blocks; A push ring is fixedly provided on the spiral sleeve (42), and an inclined surface is provided on the engaging block (43). The push ring can push the engaging block (43) to deflect.

8. The intelligent monitoring device for a gas pipe network according to claim 1, characterized in that: A hydraulic telescopic rod 1 is fixedly arranged on the first adjustment seat (21), and a hydraulic telescopic rod 2 is fixedly arranged on the second adjustment seat (22). The output ends of the hydraulic telescopic rod 1 and the hydraulic telescopic rod 2 are both provided with ultrasonic monitoring mechanisms (3).

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