A single-pull rope multi-point liquid level gauge

Abstract

The present invention relates to a liquid level meter, and specifically to a single-pull-rope multi-point liquid level meter. It includes a shell, in which a slider, a high liquid level micro switch, a low liquid level micro switch and a spring are arranged, a pull rope is installed in the spring, one end of the pull rope is connected to the slider, and the other end penetrates the shell and extends to the outside of the shell, and a hollow ball counterweight and a solid ball counterweight are arranged on the pull rope from top to bottom. The core electrical components of the present invention are all arranged in the shell, do not contact the liquid, and eliminate the possibility of electrical parts failure due to liquid leakage, and can adapt to various environments from pure water to acid and alkali concentrated liquid or other corrosive liquids; the liquid level depth of the present invention has a wide detection range, no dead zone, and will not be affected by foam; the single-pull-rope multi-point liquid level meter of the present invention is not limited to only one liquid level meter with one point, and solves the problem that multiple liquid level meters need to be installed for multi-liquid point detection, and has a simple structure and low production cost.

Description

Technical Field

[0001] The present invention relates to a liquid level meter, in particular to a single-pull rope multi-point liquid level meter, which can be widely used in water and sewage environments, acid and alkali, mud, food and other environments. Background Art

[0002] In industrial production, it is often necessary to detect whether the water level is normal to ensure that the production pressure is within the rated range. The commonly used liquid level controller currently uses a float to drive the connecting rod to move or rotate to achieve fixed-point detection and control of the liquid level. The liquid level controller in the prior art generally uses an inductive float sensor. When the water level changes, the silicon rod connected to the float moves in the inductor coil, causing the inductance at both ends of the inductor coil to change. This changed inductance is sent to the secondary instrument. When the secondary instrument receives the changed liquid level signal of this inductance, it is converted into an indication and signal corresponding to the liquid surface. The liquid level is controlled by the liquid level signal indication. However, the liquid level controller used in the prior art generally only includes one float, which can only realize one-point liquid level detection and cannot meet the requirements of detecting the liquid level at multiple locations and points. In addition, water is easy to enter the float, and the inductive sensor is easy to be damaged by water. If only one float sensor is installed, when the float sensor is damaged, it will inevitably lead to inaccurate liquid level measurement values, making the liquid level controller unable to be used normally.

[0003] The method of controlling the liquid level switch with a pull rope is simple in structure, easy to use, and can be applied in many occasions. However, the biggest disadvantage of this method is that a liquid level meter has only one liquid level control point. If you need to detect several liquid level points at the same time, installing more than two liquid level meters in one place will cause the pull rope to be entangled and unable to work.

[0004] The single-pull-rope multi-point liquid level meter of the present invention is not limited to having only one point in a liquid level meter, and solves many use occasions where several liquid point controls are required. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a single-pull rope multi-point liquid level gauge.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a single-pull-rope multi-point liquid level gauge, comprising a shell, in which a slider, a high liquid level microswitch, a low liquid level microswitch and a spring are arranged, the high liquid level microswitch and the low liquid level microswitch are arranged at both ends of the slider, the spring is installed in the slider, a pull rope is installed in the spring, one end of the pull rope is connected to the slider, and the other end penetrates the shell and extends to the outside of the shell, and a hollow ball counterweight block and a solid ball counterweight block are arranged on the pull rope in sequence from top to bottom.

[0007] Furthermore, the slider is composed of a bottom transverse slider, a vertical slider and a top transverse slider, and the bottom transverse slider, the vertical slider and the top transverse slider are sequentially connected to form a stepped slider, and the transmission element of the high liquid level microswitch abuts against the upper surface of the bottom transverse slider, and the transmission element of the low liquid level microswitch abuts against the lower surface of the top transverse slider.

[0008] Furthermore, limit blocks are provided on both ends of the pull rope located on the hollow ball counterweight block and the solid ball counterweight block.

[0009] Furthermore, a mounting card is provided at the bottom end of the shell.

[0010] Furthermore, the drawstring is made of nylon.

[0011] The beneficial effects of the present invention are:

[0012] 1. The core electrical components of the present invention, the slider, the high liquid level micro switch, the low liquid level micro switch and the spring are all arranged in the housing and do not contact the liquid, thus eliminating the possibility of electrical failure caused by liquid leakage, and can adapt to various environments from pure water to acid and alkali concentrated liquid or other corrosive liquids;

[0013] 2. The detection range of the liquid level depth of the present invention is equally adaptable from a few tenths of a meter to more than ten meters, without dead zones and will not be affected by foam;

[0014] 3. The single-pull rope multi-point liquid level gauge of the present invention is not limited to only one liquid level gauge having one point, and solves the problem that multiple liquid level gauges need to be installed for multi-liquid point detection. The present invention has a simple structure and low production cost, and is suitable for use by various enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of a single-pull rope multi-point liquid level gauge according to a specific embodiment of the present invention;

[0017] Figure 2 for Figure 1 The structural diagram of the middle slider;

[0018] Figure 3-6 This is a diagram of the use state of the present invention during the liquid level rising process;

[0019] Reference numerals:

[0020] 1-housing; 2-slider; 21-bottom horizontal slider; 22-vertical slider; 23-top horizontal slider; 3-high liquid level micro switch; 4-low liquid level micro switch; 5-spring; 6-pull rope; 7-hollow ball counterweight; 8-solid ball counterweight; 9-limit block; 10-installation card; 11-liquid level line. DETAILED DESCRIPTION

[0021] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0022] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the invention belongs.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0024] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Example

[0026] The single-pull rope multi-point liquid level meter provided by the present invention is based on the different weights of objects in air and liquid and the fact that objects with a specific gravity greater than that of liquid will sink (gravity downward); objects with a specific gravity less than that of liquid will float (gravity upward). The principle of the multi-point liquid level meter invented based on this is as follows:

[0027] like Figure 1As shown, the liquid level meter has two micro switches (high liquid level micro switch 3 and low liquid level micro switch 4), a slider 2 that triggers the micro switch, a spring 5 that pushes the slider 2 upward, a pull rope 6 connecting the slider 2, and two counterweights on the pull rope 6 (one of which is a hollow ball counterweight 7 and the other is a solid ball counterweight 8), both of which are made of PVC material, as well as a mounting card 10 for fixing the housing 1 on a wall or a pipe, and a limit block 9 for positioning the counterweight with an adjustable position. The limit block 9 can move up and down along the pull rope 6 to adjust the position of the counterweight, so as to meet the needs of different customers. In addition, a single-chip microcomputer for receiving the output of the micro switch signal is also provided in the monitoring room, so that users in the monitoring room can promptly know the height of the monitored liquid level.

[0028] Among them, Figure 2 As shown, the slider 2 is composed of a bottom transverse slider 21, a vertical slider 22 and a top transverse slider 23. The bottom transverse slider 21, the vertical slider 22 and the top transverse slider 23 are sequentially connected to form a stepped slider. The high liquid level micro switch 3 abuts against the upper surface of the bottom transverse slider 21, the low liquid level micro switch 4 abuts against the lower surface of the top transverse slider 23, and the pull rope 6 is a pull rope made of nylon wire.

[0029] The working process of the liquid level meter is as follows:

[0030] The liquid level line 11 is lower than the solid ball counterweight 8. Figure 3 As shown: the pull rope 6 bears the total weight of the hollow ball counterweight 7 and the solid ball counterweight 8 in the air. Under the action of the pull rope 6, the slider 2 compresses the spring 5 to the lowest position and triggers the low liquid level micro switch 4. At this time, the status of the liquid level meter is shown in Table 1 below.

[0031] Table 1

[0032] element state High level micro switch Normally open contact is not connected Low level micro switch Normally closed contacts separated Level meter signal output status 00 means low liquid level

[0033] The liquid level rises, such as Figure 4 As shown, after the liquid level line 11 is higher than the solid ball counterweight 8, the gravity of the pull rope 6 becomes lighter, and the slider 2 moves to the middle position under the action of the spring 5, and the low liquid level Weidong switch is reset. At this time, the status of the liquid level meter is shown in Table 2 below.

[0034] Table 2

[0035] element state High level micro switch Normally open contact is not connected Low level micro switch Normally closed contact Level meter signal output status 01 indicates medium liquid level

[0036] like Figure 5 As shown, the liquid level continues to rise, but the height does not exceed the hollow ball counterweight block 7, and the height of the liquid level line 11 changes between the two counterweight blocks. Since the gravity of the pull rope 6 remains unchanged, the liquid level meter maintains its original state, as shown in Table 2 above.

[0037] like Figure 6 As shown, the liquid level continues to rise. When the liquid level line 11 reaches the hollow ball counterweight 7, the gravity borne by the pull rope 6 is almost gone due to the buoyancy of the hollow ball counterweight 7. The slider 2 moves upward under the action of the spring 5, triggering the high liquid level Weidong switch, as shown in Table 3 below.

[0038] Table 3

[0039] element state High level micro switch Normally open contact Low level micro switch Normally closed contact Level meter signal output status 11 indicates high liquid level

[0040] When the liquid level drops from the highest point:

[0041] When the liquid level line 11 is lower than the hollow ball counterweight 7, the high liquid level micro switch 3 is actuated (normally open contact: separated);

[0042] When the liquid level line 11 is between the hollow ball counterweight 7 and the solid ball counterweight 8, the two micro switches maintain the previous state;

[0043] When the liquid level line 11 is lower than the solid ball counterweight 8, the gravity of the pull rope 6 increases, and the low liquid level micro switch 4 is actuated (normally closed contact: separated).

[0044] The relative position of the part of the liquid level meter of the present invention that enters the container (tank body) is basically fixed, and will not be entangled by the reinforcing ribs, partition supports, etc. inside the tank body; even in an environment with a mixer or large water flow, stable operation can be guaranteed by adding a special auxiliary fixing device.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A single-pull rope multi-point level gauge, characterized in that: It comprises a shell, in which a slider, a high liquid level micro switch, a low liquid level micro switch and a spring are arranged, the high liquid level micro switch and the low liquid level micro switch are arranged at both ends of the slider, the spring is installed in the slider, a pull rope is installed in the spring, one end of the pull rope is connected to the slider, and the other end penetrates the shell and extends to the outside of the shell, a hollow ball counterweight block and a solid ball counterweight block are arranged on the pull rope in sequence from top to bottom, and both ends of the pull rope located on the hollow ball counterweight block and the solid ball counterweight block are provided with adjustable position limit blocks for positioning the counterweight blocks; The slider is composed of a bottom transverse slider, a vertical slider and a top transverse slider, which are sequentially connected to form a stepped slider, and the transmission element of the high liquid level micro switch abuts against the upper surface of the bottom transverse slider, and the transmission element of the low liquid level micro switch abuts against the lower surface of the top transverse slider.

2. The single-pull rope multi-point liquid level gauge according to claim 1, characterized in that: A mounting card is arranged at the bottom end of the shell.

3. The single-pull rope multi-point liquid level gauge according to claim 2, characterized in that: The draw rope is made of nylon.

Images