Duct piece longitudinal displacement monitoring and alarming device

Abstract

A duct piece longitudinal displacement monitoring and alarming device comprises a sliding rod, a sliding sleeve, a fixed end connecting plate, a detection end connecting plate, a position switch and an alarm, the sliding sleeve is fixed to the detection end connecting plate, the detection end connecting plate is slidably arranged at one end of the sliding rod through the sliding sleeve, the fixed end connecting plate is fixed to the other end of the sliding rod, and the position switch is fixed to the alarm. The position switch is electrically connected with the alarm, the position switch is arranged adjacent to the detection end connecting plate, and when the detection end connecting plate and the position switch displace, the position switch acts to start the alarm. The position of the duct piece is automatically monitored in real time by utilizing the displacement monitoring function of the limit switch, personnel do not need to stare and control on site, the device has the characteristics of low cost and high accuracy, and when the longitudinal displacement of the duct piece occurs, the alarm gives an alarm in time, so that constructors can find and handle the longitudinal displacement in time, and major quality and safety accidents are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of shield construction, in particular to a monitoring and alarming device for longitudinal displacement of segment Background Technique

[0002] The many advantages of the shield method make it one of the main choices for tunnel (cavity) construction, and it is widely used in tunnel construction projects such as rail transit, water diversion, water conservancy and hydropower, and utility tunnels. Shield tunneling is a method of constructing tunnels underground. During propulsion, a shield tunneling machine is used to excavate and support the underground soil. After the propulsion is completed, the precast segment linings are assembled into a ring in the tunnel. One ring is excavated and one ring is assembled, and the cycle is repeated until the entire tunnel is completed.

[0003] During the propulsion of the shield, when the segment selection is improper, the position of the segment during assembly is improper, the reference of the previous ring of segments is inaccurate, the shield tail deforms or the tunnel axis is inconsistent with the actual center line of the shield, the segment and the tail shield will interfere and squeeze, which will cause a large squeezing force on the segment. Under the strong squeezing force, the segment will displace along the tunneling direction, and the relative positions of adjacent segments in the same ring will change, resulting in quality problems such as front and rear flares, internal and external opening angles, steps on the inner arc surface, too wide longitudinal joints, and relative rotation of two segments, which will cause serious harm to the waterproofing of the tunnel and the stress of the segments. During the propulsion of shield tunnels, the deformation monitoring of tunnel segments is particularly important. Existing monitoring methods include: setting monitoring points on the segments to be monitored and using total stations or dial gauges to measure at the monitoring points. However, this monitoring method can only determine that the segment has displaced after the adjacent segments have moved relative to each other and water has seeped, and cannot accurately judge the segment state in a timely manner. Content of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a monitoring and alarming device for longitudinal displacement of segments, which can alarm in time when the segments have longitudinal displacement, so as to deal with it in time and eliminate potential hazards at the budding stage.

[0005] In order to achieve the above object, the technical solution adopted by the utility model is: a monitoring and alarming device for longitudinal displacement of segments is provided, which includes a sliding rod, a sliding sleeve, a detection end connecting plate, a fixed end connecting plate, a position switch and an alarm. The sliding sleeve is fixed on the detection end connecting plate. The detection end connecting plate is slidably arranged at one end of the sliding rod through the sliding sleeve. The fixed end connecting plate is fixed at the other end of the sliding rod. The position switch and the alarm are electrically connected. The position switch is arranged adjacent to the detection end connecting plate. When the detection end connecting plate and the position switch have a displacement, the position switch acts to start the alarm.

[0006] As a further improvement of the present utility model, the position switch is a contact limit switch or a non-contact proximity switch.

[0007] As a further improvement of the present utility model, the position switch is a limit switch provided with a contact rod, a contact member is arranged on the sliding sleeve, the contact member is in contact with the contact rod of the limit switch, and when the contact member is separated from the contact rod, the limit switch acts to activate the alarm.

[0008] As a further improvement of the present utility model, the contact member is an adjusting bolt, and the adjusting bolt is connected to the sliding sleeve in a position-adjustable manner.

[0009] As a further improvement of the present utility model, hoisting head connection holes are respectively arranged on the detection end connection plate and the fixed end connection plate.

[0010] As a further improvement of the present utility model, the hoisting head connection holes on both or any one of the detection end connection plate and the fixed end connection plate are long holes.

[0011] As a further improvement of the present utility model, the hoisting head connection hole on the detection end connection plate is a long hole, and the hoisting head connection hole on the fixed end connection plate is a round hole.

[0012] As a further improvement of the present utility model, the alarm is an electronic sound and light alarm.

[0013] As a further improvement of the present utility model, both the position switch and the alarm are fixed on the sliding rod.

[0014] The beneficial effects of the present utility model are as follows: The present utility model utilizes the displacement monitoring function of the limit switch to automatically and real-time monitor the position of the segment, without the need for on-site personnel to monitor. It has the characteristics of low cost and high accuracy. When the segment undergoes displacement, the limit switch acts to activate the alarm in a timely manner, so as to facilitate the construction personnel to discover and handle in a timely manner, and prevent the occurrence of major quality and safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional schematic diagram of the device of the present utility model;

[0016] Figure 2 is a top view schematic diagram of the device of the present utility model;

[0017] Figure 3 is an installation schematic diagram of the device of the present utility model;

[0018] Marking description: sliding rod 1, sliding sleeve 2, contact part 21, detection end connecting plate 3, lifting head connecting hole 31, fixed end connecting plate 4, lifting head connecting hole 41, limit switch 5, alarm 6, segment being assembled 7, lifting head 71, previous segment 8, lifting head 81. Detailed implementation mode

[0019] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] As Figure 1 、 2 shown, a segment longitudinal displacement monitoring and alarming device includes a sliding rod 1, a sliding sleeve 2, a detection end connecting plate 3, a fixed end connecting plate 4, a position switch and an alarm 6.

[0021] The detection end connecting plate 3 is provided with a lifting head connecting hole 31. The detection end connecting plate 3 can be connected to the lifting head 71 on the segment 7 being assembled through the lifting head connecting hole 31, so that the detection end connecting plate 3 is installed on the segment 7 being assembled.

[0022] The sliding sleeve 2 is fixed on the detection end connecting plate 3, and the sliding sleeve 2 is slidably sleeved on the sliding rod 1. The detection end connecting plate 3 is slidably arranged at one end of the sliding rod 1 through the sliding sleeve 2.

[0023] The fixed end connecting plate 4 is fixed at the other end of the sliding rod 1. The fixed end connecting plate 4 is also provided with a lifting head connecting hole 41. The fixed end connecting plate 4 can be connected to the lifting head 81 on the previous segment 8 through the lifting head connecting hole 41, so that the fixed end connecting plate 4 is installed on the previous segment.

[0024] Since the segment widths may be different in different projects, in view of this problem, the following improvements are also included: the lifting head connecting holes on both or any one of the detection end connecting plate 3 and the fixed end connecting plate 4 are long holes. In this embodiment, the lifting head connecting hole 31 on the detection end connecting plate 3 is set as a long hole, the width of the long hole is adapted to the diameter of the lifting head 71, and the length is greater than the diameter of the lifting head 71; the lifting head connecting hole 41 on the fixed end connecting plate 4 is set as a round hole, and the shape of the round hole is adapted to the shape of the lifting head 81. By setting the lifting head connecting hole 31 as a long hole, the fixed position between the detection end connecting plate 3 and the segment can be adjusted according to the distance between the lifting heads 71 and 81 on the segment 7 being assembled and the previous segment 8, so as to improve the applicability of the device.

[0025] The position switch adopts a contact limit switch 5, and the limit switch 5 is fixed on the sliding rod 1 and arranged adjacent to the detection end connecting plate 3. The alarm 6 adopts an electronic sound and light alarm, and the alarm 6 is also fixed on the sliding rod 1 and electrically connected to the limit switch 5. The limit switch 5 is used to monitor whether the detection end connecting plate 3 has a displacement. When the detection end connecting plate 3 and the position switch have a displacement, the position switch acts to activate the alarm 6. Specifically, a contact member 21 is arranged on the sliding sleeve 2, and the contact member 21 is in contact with the contact rod of the limit switch 5, and the alarm 6 is not activated. When the contact member 21 is separated from the contact rod, the limit switch 5 acts to activate the alarm 6. It should be noted that in other embodiments, the position switch can also adopt a non-contact proximity switch.

[0026] Furthermore, the contact member 21 is an adjusting bolt, and the adjusting bolt is connected to the sliding sleeve 2 in a position-adjustable manner. By changing the position of the adjusting bolt, the depth of the adjusting bolt pressing against the contact rod is changed, and thus the triggering sensitivity of the limit switch 5 is adjusted.

[0027] When the above device is in use, the detection end connecting plate 3 is installed on the segment 7 being assembled, and the fixed end connecting plate 4 is installed on the previous ring segment 8, thereby realizing the installation of the above device. Under normal circumstances, the contact member 21 is in contact with the contact rod of the limit switch 5. At this time, the normally open contact of the limit switch 5 is disconnected, and the limit switch 5 and the alarm 6 are open-circuited, and the alarm 6 does not work. When the segment is loose and displaced, the detection end connecting plate 3 moves accordingly and is separated from the contact rod of the limit switch 5. The normally open contact of the limit switch 5 closes, and the limit switch 5 and the alarm 6 form a loop, and the alarm 6 works and issues an alarm, enabling the construction personnel to discover and handle it in time to prevent the occurrence of major quality and safety accidents.

[0028] The above examples are only used to conveniently illustrate the present invention and do not impose any formal restrictions on the present invention. Any person with ordinary knowledge in the relevant technical field, without departing from the technical features of the present invention, makes equivalent embodiments with partial modifications or decorations using the technical content disclosed by the present invention, and without departing from the technical feature content of the present invention, still falls within the scope of the technical features of the present invention.

Claims

1. A segment longitudinal displacement monitoring and alarm device, characterized in that: It includes a sliding rod, a sliding sleeve, a detection end connecting plate, a fixed end connecting plate, a position switch and an alarm. The sliding sleeve is fixed on the detection end connecting plate. The detection end connecting plate is slidably arranged at one end of the sliding rod through the sliding sleeve. The fixed end connecting plate is fixed at the other end of the sliding rod. The position switch and the alarm are electrically connected. The position switch is arranged adjacent to the detection end connecting plate. When the detection end connecting plate and the position switch are displaced, the position switch is actuated to activate the alarm.

2. A segment longitudinal displacement monitoring and alarm device according to claim 1, characterized in that: The position switch is a contact limit switch or a non-contact proximity switch.

3. A segment longitudinal displacement monitoring and alarm device according to claim 2, characterized in that: The position switch is a limit switch provided with a touch rod, the sliding sleeve is provided with a contact piece, the contact piece is in contact with the touch rod of the limit switch, and when the contact piece is separated from the touch rod, the limit switch is actuated to start the alarm.

4. A segment longitudinal displacement monitoring and alarm device according to claim 3, characterized in that: The contact piece is an adjusting bolt, and the position of the adjusting bolt is adjustably connected to the sliding sleeve.

5. The segment longitudinal displacement monitoring and alarm device according to claim 1 is characterized in that: The detection end connecting plate and the fixed end connecting plate are respectively provided with lifting head connecting holes.

6. A segment longitudinal displacement monitoring and alarm device according to claim 5, characterized in that: The hanging head connection hole on both or either of the detection end connection plate and the fixed end connection plate is a long hole.

7. A segment longitudinal displacement monitoring and alarm device according to claim 6, characterized in that: The lifting head connection hole on the detection end connection plate is a long hole, and the lifting head connection hole on the fixed end connection plate is a round hole.

8. The segment longitudinal displacement monitoring and alarm device according to claim 1 is characterized in that: The alarm is an electronic sound and light alarm.

9. The segment longitudinal displacement monitoring and alarm device according to claim 1, characterized in that: The position switch and the alarm are both fixed on the slide bar.

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