Static level gauge for settlement monitoring

Abstract

The utility model discloses a static leveling instrument for settlement monitoring. The static leveling instrument comprises a measuring cylinder and a floating ball type magnetostrictive sensor, the measuring cylinder comprises a transparent liquid level cylinder, the top end is provided with a top cover with an air hole, and the bottom end is connected with a shell; two liquid passing joints communicated with the upper chamber are arranged at the upper part of the shell, two aviation sockets are arranged at the lower part, and a base is sealed at the bottom end; the floating ball type magnetostriction sensor is arranged in the measuring cylinder in the mode that a measuring rod is vertically upward, an upper cavity and a lower cavity of the shell are separated through a fixing base arranged on the outer side of the measuring rod in a sleeving mode, an electronic bin of the floating ball type magnetostriction sensor is arranged in the lower cavity and connected with the two aviation sockets, and a magnetic floating ball of the floating ball type magnetostriction sensor is located in the liquid level cylinder. The static leveling instrument for settlement monitoring not only solves the problem that the precision is reduced when a traditional sensor is used for a long time, but also can drive the liquid level floating ball to settle by utilizing the liquid level change of a settlement monitoring point position, so as to realize long-term remote monitoring of the height settlement condition of the position through the liquid level height change.

Description

Technical Field

[0001] The utility model relates to the technical field of static levels, in particular to a static level for settlement monitoring. Background Art

[0002] A static level is a precision instrument for measuring height differences and their changes. It is mainly used for monitoring vertical displacement and inclination of pipeline corridors, dams, nuclear power plants, high-rise buildings, foundation pits, tunnels, bridges, subways, etc. Static levels are generally installed on measuring piers at the same height as the measured object or on the contour line of the wall of the measured object. Data is usually automatically collected and stored in the on-site collection system through the built-in stand-alone collection software in the on-site collection box, and then connected to the Internet through wired or wireless communication and transmitted to the background network software, thereby realizing automated detection.

[0003] Existing static levels are typically designed with capacitive or inductive sensors to monitor settlement by measuring water level changes. However, due to the long intervals between settlements, these sensors, as precision electrical components, experience a loss of accuracy over time, leading to inaccurate settlement monitoring results. Therefore, it is necessary to design a new type of static level for settlement monitoring that can circumvent the technical issues of existing static levels. Utility Model Content

[0004] The purpose of the utility model is to provide a static level for settlement monitoring which solves the above technical problems.

[0005] To this end, the technical solution of this utility model is as follows:

[0006] A static level for sedimentation monitoring, comprising a measuring tube and a float-type magnetostrictive sensor; wherein the measuring tube comprises a liquid level tube, which is a transparent cylinder; the top opening of the liquid level tube is covered and sealed with a top cover, and the top cover is provided with an air hole; the bottom end of the liquid level tube is connected to a shell having a cylindrical structure, and the inner cavities of the two are connected; the inner cavity of the shell is divided into an upper chamber and a lower chamber by an inner annular boss arranged on the inner wall, and two liquid-passing joints connected to the upper chamber of the shell are symmetrically arranged on the upper side wall of the shell, and two aviation sockets are symmetrically arranged on the lower side wall of the shell; the bottom end of the shell is connected to a fixed base, which closes the outer The bottom end opening of the shell; a fixing seat is centrally arranged on the upper end surface of the inner annular boss of the shell, and an axial through hole is opened on the fixing seat to adapt to the outer diameter of the measuring rod; the float-type magnetostrictive sensor is arranged in the measuring cylinder with its measuring rod vertically upward; the electronic compartment of the float-type magnetostrictive sensor is arranged in the lower chamber of the shell, and its two terminal terminals are electrically connected to two aviation sockets via cables; the measuring rod of the float-type magnetostrictive sensor is sealed and passed through the axial through hole of the fixing seat, and its top end abuts against the top cover; the magnetic float of the float-type magnetostrictive sensor is located in the liquid level cylinder and floats up and down with the rise and fall of the liquid level in the cylinder.

[0007] Furthermore, the top cover, the liquid level cylinder and the outer shell are threadedly connected and fixed in sequence from top to bottom; the base is fixed to the bottom end of the outer shell by a plurality of fixing bolts evenly distributed along the circumferential direction; the threaded connection between the liquid level cylinder and the outer shell is sealed by setting a first sealing ring, and the connection between the outer shell and the base is sealed by setting a second sealing ring.

[0008] Furthermore, the inner diameter of the channel of the liquid-passing joint is larger than the aperture of the air hole.

[0009] Furthermore, the base is a plate body with an outer diameter larger than the outer diameter of the shell, and a plurality of mounting holes are evenly distributed along the circumferential direction near the outer edge of the plate body.

[0010] Furthermore, an inner cylinder is vertically fixed at the center of the bottom surface of the top plate of the top cover, and the inner diameter of the inner cylinder is adapted to the outer diameter of the measuring rod, so that the top end of the measuring rod is inserted into the inner cylinder.

[0011] Furthermore, an annular groove with a built-in third sealing ring is opened on the bottom surface of the fixing seat, so that the fixing seat is press-fitted and fixed on the upper end surface of the inner annular boss through the third sealing ring.

[0012] Compared with the existing technology, this static level for settlement monitoring uses a float-type magnetostrictive sensor to replace the traditional sensor, solving the problem of decreased accuracy of traditional sensors after long-term use; at the same time, the monitor is equipped with a float-type magnetostrictive sensor and a measuring tube designed to match its working principle and application scenario, so that it can use the principle that the liquid level change at the settlement monitoring point drives the settlement of the liquid level float, and realizes long-term remote monitoring of liquid settlement changes by monitoring the height changes of the float. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the external structure of the static level for settlement monitoring of the present utility model;

[0014] Figure 2 A three-dimensional cross-sectional view of the upper structure of the static level for settlement monitoring of the present invention;

[0015] Figure 3 It is a three-dimensional cross-sectional view of the lower structure of the static level for settlement monitoring of the present utility model. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, the following embodiments are by no means intended to limit the present invention in any way.

[0017] See also Figures 1 to 3The static level for settlement monitoring includes a measuring tube and a floating ball magnetostrictive sensor; wherein the measuring tube includes a top cover 1, a liquid level tube 2, a shell 3 and a base 4 connected in sequence from top to bottom.

[0018] The liquid level cylinder 2 is a cylindrical body made of a transparent material; in this embodiment, the liquid level cylinder 2 is specifically a cylindrical body made of acrylic.

[0019] The top cover 1 is a cylindrical cover body, which is installed at the top opening of the liquid level cylinder 2 to close the top opening of the liquid level cylinder 2. The top cover 1 is also provided with an air hole 12 to balance the internal and external pressures of the liquid level cylinder 2. In this embodiment, the top cover 1 is formed by a top plate and an annular body provided on the bottom surface of the top plate, and the inner diameter of the annular body is slightly larger than the outer diameter of the liquid level cylinder 2. The inner wall of the bottom end of the top cover 1 is provided with an internal connecting thread, and correspondingly, the outer wall of the top end of the liquid level cylinder 2 is provided with an external connecting thread, so that the top cover 1 can be detachably threaded and fixed to the top side of the liquid level cylinder 2. A cylindrical inner cylinder is also vertically fixed at the center of the bottom surface of the top plate of the top cover 1, and the inner diameter of the inner cylinder is adapted to the outer diameter of the top end of the measuring rod 11 in the magnetostrictive sensor.

[0020] The shell 3 is a cylindrical barrel, and an inner annular boss is provided on the inner wall of the middle part of the barrel, so that the inner cavity of the barrel is divided into an upper chamber and a lower chamber that are connected to each other at the upper and lower parts; in actual application, the upper chamber is used as a hydraulic chamber, and the lower chamber is used as a measuring chamber; specifically, two first mounting holes are symmetrically opened on the side wall of the shell 3 corresponding to the upper chamber, and a liquid-transmitting joint 6 is installed in each of the two first mounting holes, so that the liquid outside the shell 3 can flow in or out through the two liquid-transmitting joints 6; wherein the inner diameter of the channel of the liquid-transmitting joint 6 is larger than the aperture of the air hole 12; two second mounting holes are symmetrically opened on the side wall of the shell 3 corresponding to the lower chamber, and an aviation socket 5 is installed in each of the two second mounting holes to assist the device in the lower chamber to achieve electrical connection with the equipment outside the shell 3.

[0021] In this embodiment, the top inner diameter of the shell 3 is smaller than the bottom inner diameter thereof, so that an annular step is formed on the inner wall of the shell 3; the top outer diameter of the shell 3 is larger than the bottom outer diameter of the liquid level cylinder 2, and the top inner wall of the shell 3 is provided with a connecting internal thread, and correspondingly, the bottom outer wall of the liquid level cylinder 2 is provided with a connecting external thread, so that the bottom end of the liquid level cylinder 2 can be detachably threaded and fixed to the top side of the shell 3; in order to ensure the sealing of the connection between the shell 3 and the liquid level cylinder 2, an annular groove with a built-in first sealing ring 9 is provided on the upper end face of the annular step of the shell 3, and the opening position of the annular groove is adapted to the position of the bottom end face of the liquid level cylinder 2, so that when the bottom end of the liquid level cylinder 2 is threadedly connected to the top of the shell 3, the bottom end face of the liquid level cylinder 2 is pressed onto the first sealing ring 9, thereby forming a seal at the connection between the shell 3 and the liquid level cylinder 2.

[0022] A fixing seat 8 is also provided in the upper chamber of the housing 3. The fixing seat 8 is centrally arranged and sealed on the top surface of the inner annular boss in the housing 3. An axial through hole adapted to the outer diameter of the measuring rod 11 of the magnetostrictive sensor is provided at the center of the fixing seat 8. In this embodiment, the fixing seat 8 is a cylindrical body with an annular boss on the outer wall, and an annular groove with a third sealing ring 14 is provided on its bottom surface along the circumferential direction. The setting position of the third sealing ring 14 satisfies: the fixing seat 8 is press-fitted on the top surface of the inner annular boss through the third sealing ring 14, so that the fixing seat 8 and the inner annular boss are in contact. A seal is formed between the housing 3 and the liquid level cylinder 2; furthermore, by means of a first sealing ring 9 provided between the housing 3 and the liquid level cylinder 2, and a third sealing ring 14 provided between the inner annular boss of the housing 3 and the fixed seat 8, the upper chamber of the housing 3 is sealed and isolated from its lower chamber, and a sealed chamber is formed which is connected to the outside through two liquid-transmitting joints 6, thereby preventing the liquid which flows into the upper chamber of the housing 3 through the two liquid-transmitting joints 6 from flowing out from the threaded connection between the housing 3 and the liquid level cylinder 2, thereby affecting the accuracy of the measurement of the liquid level change, and simultaneously preventing the liquid in the upper chamber from flowing into the lower chamber, thereby damaging the device arranged in the lower chamber.

[0023] The float-type magnetostrictive sensor adopts a commercially available product, which specifically includes a magnetic float ball 7, a measuring rod and an electronic compartment 13; the measuring rod 11 is vertically fixed on the top surface of the electronic compartment 13, and the magnetic float ball 7 is sleeved on the measuring rod 11 and can move back and forth relative to the measuring rod 11; in actual application, the electronic compartment 13 is equipped with an excitation module to apply a current pulse at both ends of the measuring rod 11 made of magnetostrictive waveguide material, and the current pulse forms a circumferential Ampere annular pulse magnetic field around the waveguide wire at the speed of light; the annular magnetic field can couple with the bias permanent magnetic field in the magnetic float ball 7 and form a Widmann effect torsional wave pulse. Since the torsional wave pulse will be transmitted along the two ends of the waveguide material of the measuring rod 11 at a fixed intrinsic velocity and detected and received respectively, the control module in the electronic compartment 13 can accurately determine the specific position of the magnetic float ball 7 on the measuring rod 11 through the time difference of receiving the torsional wave pulse at both ends of the waveguide material.

[0024] See also Figure 3The electronic compartment 13 of the float-type magnetostrictive sensor is built into the lower chamber of the shell 3, and the two terminal ends of the electronic compartment 13 are electrically connected to the two aviation sockets 5 through cables respectively; the measuring rod 11 of the electronic compartment 13 of the float-type magnetostrictive sensor is vertically upward and is successively passed through the axial through hole of the fixing seat 8 and the liquid level cylinder 2, and the top end of the measuring rod 11 is inserted into the inner cylinder of the top cover 1, so that the measuring rod 11 remains centered in the measuring cylinder, wherein a sealing sleeve is provided between the measuring rod 11 and the axial through hole of the fixing seat 8, so that the measuring rod 11 is sealed and connected to the axial through hole of the fixing seat 8; the magnetic float 7 of the float-type magnetostrictive sensor is adapted to the setting position of the liquid level cylinder 2, so that the magnetic float 7 floats up and down on the measuring rod 11 with the liquid level in the liquid level cylinder 2, which is convenient for observation.

[0025] The base 4 is a circular disk, the shell 3 is fixed in the center of the top surface of the base 4, and a second sealing ring 10 is provided at the joint between the shell 3 and the base 4, so that the shell 3 and the base 4 are sealed and connected, ensuring that the lower chamber of the shell 3 is a closed chamber; a plurality of mounting holes are also evenly distributed along the circumferential direction on the disk of the base 4, so that the static level for settlement monitoring can be fixed at the designated settlement measurement monitoring point through the base 4.

[0026] In this embodiment, a plurality of screw holes are evenly distributed along the circumferential direction of the disk body on the base 4 located on the inner side of the plurality of mounting holes. Correspondingly, a plurality of cylindrical threaded blind holes are evenly distributed along the circumferential direction on the bottom end face of the shell 3, so that the shell 3 and the base 4 are connected and fixed by fixing bolts passing through each corresponding screw hole and threaded blind hole from bottom to top; the second sealing ring 10 is arranged on the inner side of the plurality of fixing bolts to be built-in and sealed at the joint between the inner wall of the bottom end of the shell 3 and the top surface of the base 4.

[0027] The following takes the vertical settlement monitoring process of the foundation pit as an example to describe the specific use of the static level for settlement monitoring to achieve foundation pit settlement monitoring:

[0028] S1. Based on the settlement monitoring requirements of a foundation pit, N static levels for settlement monitoring are obtained. One of the static levels is used as a working base point and is placed at a location where the foundation is stable, convenient for observation, and unaffected by structural deformation. The remaining N-1 static levels are placed at observation points on the top of the foundation pit, with adjacent observation points spaced 20 m apart. Specifically, each static level for settlement monitoring is fixed at a designated location via its base 4, with the working base point and each observation point located at the same horizontal position.

[0029] S2. Connect the two aviation sockets 5 on each settlement monitoring static level to the respective plugs on the signal receiving device at the construction site via cables, so that the position change signal detected by the electronic compartment 13 is transmitted to the signal receiving device in real time. Simultaneously, connect the two adjacent liquid-passing joints 6 on each pair of adjacent settlement monitoring static levels using N liquid connecting pipes, so that the upper chambers of the N settlement monitoring static levels are sequentially connected in series.

[0030] S3. Open the top cover 1 of a static level for settlement monitoring, and pour the monitoring liquid (preferably antifreeze) into the liquid level cylinder 2. Based on the principle of communicating vessels, the initial liquid levels of the monitoring liquids in the liquid level cylinders 2 of each static level for settlement monitoring are consistent, and the magnetic float ball 7 in the liquid level cylinder 2 floats up under the buoyancy of the monitoring liquid. When the magnetic float ball 7 stabilizes, the position of the magnetic float ball 7 on the measuring rod 11 is measured by the electronic compartment of the float-type magnetostrictive sensor as the initial liquid level position, and the position is sent to the signal receiving device at the construction site. The amount of monitoring liquid poured is preferably set to be such that the liquid level of the monitoring liquid in the liquid level cylinder 2 reaches the middle liquid level position of the liquid level cylinder 2.

[0031] S4. In the subsequent long-term settlement monitoring process, when a monitoring position of the foundation pit settles, the setting position of the static level for settlement monitoring also settles. The magnetic float ball 7 moves downward due to the buoyancy as the liquid level of the monitoring liquid in the liquid level cylinder 2 drops. The electronic compartment of the float-type magnetostrictive sensor is used again to measure the position of the magnetic float ball 7 on the measuring rod 11 and send it to the signal receiving device at the construction site. By comparing the two data, the foundation pit settlement situation can be fed back in a timely and effective manner.

Claims

1. A static level for settlement monitoring, characterized in that: The invention comprises a measuring cylinder and a float-type magnetostrictive sensor; wherein the measuring cylinder comprises a liquid level cylinder (2), which is a transparent cylinder; the top opening of the liquid level cylinder (2) is covered and sealed with a top cover (1), and the top cover (1) is provided with an air hole (12); the bottom end of the liquid level cylinder (2) is connected to a shell (3) having a cylindrical structure, and the inner cavities of the two are connected; the inner cavity of the shell (3) is divided into an upper chamber and a lower chamber by an inner annular boss arranged on the inner wall, and two liquid-passing joints (6) connected to the upper chamber of the shell (3) are symmetrically arranged on the upper side wall of the shell (3), and two aviation sockets (5) are symmetrically arranged on the lower side wall of the shell (3); the bottom end of the shell (3) is connected to a fixed base (4), which closes the shell (3) The bottom end opening is provided; a fixing seat (8) is centrally provided on the upper end surface of the inner annular boss of the housing (3), and an axial through hole is provided on the fixing seat that is adapted to the outer diameter of the measuring rod (11); the floating ball type magnetostrictive sensor is arranged in the measuring cylinder in a manner that its measuring rod (11) is vertically upward; the electronic compartment (13) of the floating ball type magnetostrictive sensor is arranged in the lower chamber of the housing (3), and its two terminal ends are electrically connected to the two aviation sockets (5) through cables respectively; the measuring rod (11) of the floating ball type magnetostrictive sensor is sealed and penetrated in the axial through hole of the fixing seat (8), and its top end is against the top cover (1); the magnetic float (7) of the floating ball type magnetostrictive sensor is located in the liquid level cylinder (2) and floats up and down as the liquid level in the cylinder rises and falls.

2. The static level for settlement monitoring according to claim 1, characterized in that: The top cover (1), the liquid level cylinder (2) and the outer shell (3) are threadedly connected and fixed in sequence from top to bottom; the base (4) is connected and fixed to the bottom end of the outer shell (3) by a plurality of fixing bolts evenly distributed along the circumferential direction; the threaded connection between the liquid level cylinder (2) and the outer shell (3) is sealed by providing a first sealing ring (9), and the connection between the outer shell (3) and the base (4) is sealed by providing a second sealing ring (10).

3. The static level for settlement monitoring according to claim 1, characterized in that: The inner diameter of the channel of the liquid-passing joint (6) is larger than the aperture of the air hole (12).

4. The static level for settlement monitoring according to claim 1, characterized in that: The base (4) is a plate body with an outer diameter greater than that of the outer shell (3), and is provided with a plurality of mounting holes evenly distributed along the circumferential direction near the outer edge.

5. The static level for settlement monitoring according to claim 1, characterized in that: An inner cylinder is vertically fixed at the center of the bottom surface of the top plate of the top cover (1). The inner diameter of the inner cylinder is adapted to the outer diameter of the measuring rod (11), so that the top end of the measuring rod (11) is inserted into the inner cylinder.

6. The static level for settlement monitoring according to claim 1, characterized in that: An annular groove with a built-in third sealing ring (14) is provided on the bottom surface of the fixing seat (8), so that the fixing seat (8) is pressed and fixed on the upper end surface of the inner annular boss through the third sealing ring (14).

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