Liquid level sensor

Abstract

The utility model relates to the technical field of tunnel construction, in particular to a liquid level sensor which comprises a first electrode, a second electrode, a fixed shell and a connecting wire, the connecting wire comprises a first circuit and a second circuit, liquid level detection is achieved through conduction of the first electrode, the second electrode, the first circuit and the second circuit, and the overall structure is simple; the first electrode and the second electrode are combined to detect the liquid level height of concrete, when the concrete is poured and the concrete is in contact with the two electrodes of the liquid level sensor, current can be generated in the liquid level sensor, so that signals are obtained, and the liquid level height of concrete pouring can be judged in real time through the signals. The concrete height in the lining process can be rapidly and efficiently detected.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel construction technical field, concretely relates to a liquid level sensor. BACKGROUND

[0002] In tunnel engineering, secondary lining is one of the key processes to ensure the stability and safety of tunnel structure. The traditional secondary lining construction method is mainly through pouring trolley to pour concrete. The pouring quality of concrete directly affects the overall quality of tunnel structure, therefore, it is particularly important to control the pouring process of concrete.

[0003] In the prior art, the pouring process of concrete is mainly controlled by manual observation, specifically: the construction personnel observes the pouring state of concrete through the work window or stands at the blocking end of the trolley, judges the pouring height, and decides whether to switch the pipeline or open the vibrator for vibration. The advantage of this method is that it can be flexibly adjusted according to the actual situation, but due to the limitation of tunnel construction environment, manual observation may be affected by factors such as light and dust, resulting in inaccurate observation results. In addition, manual observation also needs to consume a lot of manpower and time, which increases the construction cost to some extent.

[0004] In order to master the height of concrete pouring in real time, record the whole process of pouring, effectively control the steps of concrete pouring, and ensure that the poured concrete meets the acceptance requirements, a measuring device with simple structure and high efficiency for detecting the height of concrete in lining process is urgently needed to solve the problems existing in the prior art. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a measuring device with simple structure and high efficiency for detecting the height of concrete in lining process, and the specific technical solutions are as follows:

[0006] A liquid level sensor, comprising a first electrode, a second electrode, a fixed shell and a connecting line; the fixed shell is made of insulating material, and a first mounting part and a second mounting part are arranged on the fixed shell; the first electrode is arranged at the first mounting part, and the second electrode is arranged at the second mounting part; the connecting line comprises a first line and a second line, the first line is connected with the first electrode, and the second line is connected with the second electrode; the liquid level detection is realized through the conduction of the first electrode, the second electrode, the first line and the second line.

[0007] Preferably, the first electrode and the second electrode are both annular structures; the first electrode and the second electrode are arranged from inside to outside.

[0008] Preferably, the annular structure is at least one of a circle, a polygon and an axisymmetric figure; the first electrode and the second electrode are arranged on the same central axis.

[0009] Preferably, the fixed shell comprises a limiting plate and a cylinder body; the cylinder body comprises an inductive end cylinder body and a connecting end cylinder body arranged in series, and the first electrode and the second electrode are arranged on an inductive end face of the inductive end cylinder body; the limiting plate is arranged at the joint of the inductive end cylinder body and the connecting end cylinder body, and is used for limiting the distance of the inductive end cylinder body inserted into the liquid level detection hole of the trolley template.

[0010] Preferably, a boss is arranged on the outer wall of the inductive end cylinder body, and is used for being attached to and fixed on the inner wall of the liquid level detection hole.

[0011] Preferably, a groove for mounting a magnetic body is arranged on the limiting plate, and the magnetic body is used for adsorbing and fixing the liquid level sensor and the lining trolley template.

[0012] Preferably, the fixed shell further comprises an end fixing plate, and the end fixing plate is arranged at the free end of the connecting end cylinder body.

[0013] Preferably, a notch for leading out a connecting line is arranged on the end fixing plate.

[0014] Preferably, the fixed shell comprises a cylinder body and a fixing piece, the fixing piece is detachably arranged on the trolley template, and a mounting hole with an internal thread is arranged on the fixing piece; the cylinder body comprises a first section and a second section arranged in series, the first section can be inserted into the mounting hole, and the first electrode and the second electrode are arranged on an inductive end face of the first section; an external thread matched with the internal thread is arranged on the outer wall of the second section; the fixing piece is a nut thread; and the distance of the first section inserted into the liquid level detection hole of the trolley template is limited through the matching of the internal thread and the external thread.

[0015] The technical scheme of the utility model has the following beneficial effects:

[0016] (1) The liquid level sensor comprises a first electrode, a second electrode, a fixed shell and a connecting line, the connecting line comprises a first line and a second line, liquid level detection is realized through the conduction of the first electrode, the second electrode, the first line and the second line, and the overall structure is simple; the detection of the concrete liquid level height is realized through the combination of the first electrode and the second electrode, when the concrete is poured, when the concrete contacts the two electrodes of the liquid level sensor, an electric current can be generated in the liquid level sensor, so that signals are obtained, the liquid level height of the concrete pouring can be judged in real time through the signals, the height of the concrete in the lining process is detected quickly and efficiently, and the lining construction is guided.

[0017] (2) The first electrode and the second electrode are both annular structures; the first electrode and the second electrode are arranged from inside to outside. The annular structure is at least one of a circle, a polygon and an axisymmetric figure, and is selected according to actual requirements, so that the adaptability is high.

[0018] (3) The utility model discloses a fixed casing includes stop plate and cylinder, the cylinder includes the induction end cylinder and the connecting end cylinder who sets in series, through the design of stop plate, can be used for limiting induction end cylinder inserts the distance of liquid level detection hole on trolley template, ensure that the induction end surface of induction end cylinder is flush with the surface of lining trolley template, improve the inspection accuracy. The fixed mode of fixed casing and lining trolley template can have many, such as the fixed of boss and liquid level detection hole inner wall surface, set up magnetic body and lining trolley template magnetic fixed on the stop, can also adopt the fixed casing's column and set up the thread connection fixed form of the internal thread of the fixed piece on the external thread.

[0019] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. Below, referring to the drawing, the utility model will be further detailed. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings constituting a part of this application are used to provide further understanding of the utility model, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute undue limitation on the utility model. In the drawings:

[0021] Figure 1 It is the structure schematic view of liquid level sensor in the preferred embodiment 1 of the utility model,

[0022] Figure 2 It is the structure schematic view of liquid level sensor of other shapes, wherein: (a) is rectangle, (b) is regular hexagon,

[0023] Figure 3 It is the structure schematic view of liquid level sensor in the preferred embodiment 2 of the utility model, Figure 1

[0024] It is the structure schematic view of liquid level sensor in the preferred embodiment 3 of the utility model, Figure 4

[0025] It is the structure schematic view of liquid level sensor in the preferred embodiment 3 of the utility model, Figure 5 Figure 4 It is the structure schematic view of liquid level sensor in the preferred embodiment 3 of the utility model,

[0026] Figure 6 It is the structure schematic view of liquid level sensor in the preferred embodiment 3 of the utility model,

[0027] Figure 7 Figure 6 It is the structure schematic view of liquid level sensor in the preferred embodiment 3 of the utility model,

[0028] ​​Wherein, 1, the first electrode; 2, the second electrode; 3, fixed shell, 3.1, limit plate, 3.2, barrel, 3.21, induction end column body, 3.22, connecting end column body, 3.3, end fixed plate, 3.4, column body, 3.41, first section, 3.42, second section, 3.5, fixed part;A, boss, B, groove;4, connecting line, 4.1, first line, 4.2, second line;5, lining trolley template;6, concrete;7, magnetic body. DETAILED DESCRIPTION

[0029] The embodiments of the utility model are described in detail below in combination with the drawings, but the utility model can be implemented in multiple different ways limited and covered by the claims.

[0030] Embodiment 1:

[0031] A liquid level sensor can detect the height of concrete 6 in the lining process.

[0032] See Figure 1 And Figure 3 The liquid level sensor of the embodiment comprises a first electrode 1, a second electrode 2, a fixed shell 3 and a connecting line 4;The fixed shell 3 is of insulating material, and a first mounting site and a second mounting site are arranged on it;The first electrode 1 is arranged at the first mounting site, and the second electrode 2 is arranged at the second mounting site;The connecting line 4 comprises a first line 4.1 and a second line 4.2, the first line 4.1 is connected with the first electrode 1, and the second line 4.2 is connected with the second electrode 2;The liquid level detection is realized by the conduction of the first electrode 1, the second electrode 2, the first line 4.1 and the second line 4.2, that is, when the concrete contacts the two electrodes of the liquid level sensor during concrete pouring, the first electrode 1 and the second electrode 2 are conducted and electrified, and current can be generated in the liquid level sensor, so that signals are obtained, the liquid level height of concrete pouring can be judged in real time through these signals, and the height of concrete in the lining process is detected quickly and efficiently.

[0033] Preferably in the embodiment, the first electrode 1 and the second electrode 2 are both annular structures;The first electrode 1 and the second electrode 2 are arranged from inside to outside. See Figure 1 Here, preferably circular, the first electrode 1 and the second electrode 2 are arranged on the same central axis, when the trolley pours, the concrete enters through the window of the trolley template, the installation position of the liquid level sensor is staggered with the position of the feeding window and is as far away from the concrete feeding position as possible, and the area occupied by the sensing end face of the liquid level sensor relative to the trolley template is very small, so the probability of concrete splashing and contacting the sensing end of the liquid level sensor is low. Therefore, when the liquid level sensor detects signals, it can be considered that the installation height of the liquid level sensor is the real-time liquid level height. In addition, the annular structure can also adopt at least one of polygon, axial symmetry figure, etc. Figure 2Fig. 1(a) illustrates a square, Figure 2 Fig. 1(b) illustrates a hexagon.

[0034] Fig. 2 illustrates the installation of the liquid level sensor on the lining trolley template. Figure 1 Fig. 3 illustrates the installation of the liquid level sensor on the lining trolley template. Figure 3 The fixed shell 3 comprises a limiting plate 3.1, a cylinder body 3.2, and an end fixed plate 3.3; the cylinder body 3.2 comprises an inductive end cylinder 3.21 and a connecting end cylinder 3.22 arranged in series, and the first electrode 1 and the second electrode 2 are arranged on the inductive end surface of the inductive end cylinder 3.21; the limiting plate 3.1 is arranged at the junction of the inductive end cylinder 3.21 and the connecting end cylinder 3.22, and is used to limit the distance of the inductive end cylinder 3.21 inserted into the liquid level detection hole of the trolley template; and the end fixed plate 3.3 is arranged at the free end of the connecting end cylinder 3.22. In this embodiment, the cylinder body is in a cylindrical structure, and the limiting plate and the end fixed plate are annular plates. The end fixed plate can be used to further strengthen the connection with other accessories, or can be used for hand-held convenience in installing and dismounting the liquid level sensor.

[0035] In this embodiment, the installation mode of the liquid level sensor (see Figure 3 ) is that a boss A is arranged on the outer wall of the inductive end cylinder 3.21 for being attached to and fixed on the inner wall of the liquid level detection hole. The inductive end cylinder surface is designed with an annular boss A, and the length dimension of the inductive end cylinder 3.21 should be the same as the thickness dimension of the lining trolley template. A force receiving hole (i.e. the liquid level detection hole) needs to be opened on the lining trolley template for installing the liquid level sensor, and the diameter dimension of the force receiving hole should be the same as the diameter dimension of the inductive end cylinder 3.21. When installing the liquid level sensor, the inductive end cylinder 3.21 of the liquid level sensor is inserted into the force receiving hole, the boss A on the inductive end cylinder 3.21 can be extruded with the inner wall surface of the force receiving hole to generate friction, so that the liquid level sensor can be stabilized in the force receiving hole. In addition, thread glue can also be applied on the outer wall surface of the inductive end cylinder 3.21 to enhance the stability between the liquid level sensor and the force receiving hole. When installing the liquid level sensor, the limiting plate 3.1 is attached to the inner side of the lining trolley template to ensure that the inductive end surface is flush with the outer side panel of the lining trolley template without error, see Figure 3 .

[0036] In addition, a notch can be designed on the end fixed plate 3.3 to facilitate the connection line 4 to be led out and connected with the external system.

[0037] Embodiment 2:

[0038] See Figure 4 and Figure 5 The difference between this embodiment and embodiment 1 is that:

[0039] The fixed shell 3 comprises a column 3.4 and a fixing part 3.5 which is detachably arranged on the trolley formwork and is provided with an installation hole with internal threads. Preferably, the fixing part 3.5 is a nut.

[0040] The column 3.4 comprises a first section 3.41 and a second section 3.42 arranged in series, the first section 3.41 can be inserted into the installation hole, and the first electrode 1 and the second electrode 2 are arranged on the sensing end surface of the first section 3.41; the outer wall of the second section 3.42 is provided with external threads matched with the internal threads; the matching of the internal threads and the external threads limits the distance of the insertion of the first section 3.41 into the liquid level detection hole on the trolley formwork, and the length dimension of the first section 3.41 should be the same as the thickness dimension of the lining trolley formwork.

[0041] By applying the scheme of the embodiment, specifically, the fixing part 3.5 (i.e. the nut) is pre-welded at the stress hole on the inner side of the lining trolley formwork 5, to ensure that the internal thread hole of the nut is concentrically arranged with the stress hole. When installing the liquid level sensor, the first section 3.41 with the sensing end surface in the fixed shell 3 is inserted into the internal thread hole of the nut, and the external threads on the second section 3.42 are threadedly connected with the internal threads on the nut. After the liquid level sensor is tightened with the nut, the sensing end surface of the liquid level sensor is flush with the outer side panel of the lining trolley formwork without error, which will be described in detail in Figure 5 .

[0042] Embodiment 3:

[0043] For details, please refer to Figure 6 and Figure 7 The difference between the embodiment and the embodiment 1 is that the limiting plate 3.1 is provided with a groove B for installing the magnetic body 7, which is used for adsorbing and fixing the liquid level sensor and the lining trolley formwork. The length dimension of the sensing end column should be the same as the thickness dimension of the lining trolley formwork.

[0044] By applying the scheme of the embodiment, specifically,

[0045] When installing the liquid level sensor, the sensing end column of the liquid level sensor is inserted into the stress hole from the inner side of the panel of the lining trolley formwork, and the magnetic body 7 (preferably a magnet) fixed on the limiting plate 3.1 can be adsorbed on the inner side of the lining trolley formwork, so as to realize the fixation of the liquid level sensor.

[0046] In addition, the lining trolley formwork and the limiting plate 3.1 can also be connected by bolts or other detachable ways.

[0047] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid level sensor, characterized by, The utility model provides a liquid level detection device, which comprises a first electrode (1), a second electrode (2), a fixed shell (3) and a connecting wire (4), the fixed shell (3) is made of insulating material, and a first mounting site and a second mounting site are arranged on the fixed shell (3), the first electrode (1) is arranged on the first mounting site, and the second electrode (2) is arranged on the second mounting site, the connecting wire (4) comprises a first line (4.1) and a second line (4.2), the first line (4.1) is connected with the first electrode (1), and the second line (4.2) is connected with the second electrode (2), and the liquid level detection is realized through the conduction of the first electrode (1), the second electrode (2), the first line (4.1) and the second line (4.2).

2. The liquid level sensor of claim 1, wherein, The first electrode (1) and the second electrode (2) are both annular structures, and the first electrode (1) and the second electrode (2) are arranged from inside to outside.

3. The liquid level sensor of claim 2, wherein, The annular structure is at least one of a circle, a polygon and an axisymmetric figure, and the first electrode (1) and the second electrode (2) are arranged along a same central axis.

4. The liquid level sensor according to any one of claims 1 to 3, characterized in that The fixed shell (3) comprises a limiting plate (3.1) and a cylinder body (3.2), the cylinder body (3.2) comprises an inductive end cylinder body (3.21) and a connecting end cylinder body (3.22) arranged in series, the first electrode (1) and the second electrode (2) are arranged on an inductive end face of the inductive end cylinder body (3.21), and the limiting plate (3.1) is arranged at the junction of the inductive end cylinder body (3.21) and the connecting end cylinder body (3.22).

5. The liquid level sensor of claim 4, wherein, A boss (A) is arranged on the outer wall of the inductive end cylinder body (3.21) and used for being attached to and fixed on the inner wall of a liquid level detection hole.

6. The liquid level sensor of claim 4, wherein, A groove (B) for mounting a magnetic body is arranged on the limiting plate (3.1).

7. The liquid level sensor of claim 4, wherein, The fixed shell (3) further comprises an end fixing plate (3.3) arranged at the free end of the connecting end cylinder body (3.22).

8. The liquid level sensor of claim 7, wherein, A notch for leading out the connecting wire (4) is arranged on the end fixing plate (3.3).

9. The liquid level sensor according to any one of claims 1 to 3, characterized in that The fixed shell (3) comprises a cylinder body (3.4) and a fixing member (3.5), the fixing member (3.5) is detachably arranged on a trolley template, an installation hole with internal threads is arranged on the fixing member (3.5), the cylinder body (3.4) comprises a first section (3.41) and a second section (3.42) arranged in series, the first section (3.41) can be inserted into the installation hole and arranged, the first electrode (1) and the second electrode (2) are arranged on the inductive end face of the first section (3.41), and external threads matched with the internal threads are arranged on the outer wall of the second section (3.42), and the fixing member (3.5) is a nut thread.

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