Float-type single-tube photosensitive liquid level meter

Abstract

The utility model relates to the technical field of photosensitive liquid level meters, in particular to a float type single-tube photosensitive liquid level meter. According to the technical scheme, the device comprises a single pipe body, a bottom shell and an end cover, the end cover and the bottom shell are fixed to the upper end and the lower end of the single pipe body respectively, a floater is movably installed in the single pipe body, a connecting pipe is fixed to the bottom shell, an inserting head is fixed to the bottom of the end cover and inserted into the single pipe body, and a mounting groove is formed in the center of the bottom of the inserting head. A mounting rod is fixed in the mounting groove, a laser transmitter is fixed at one end of the mounting rod, and a photosensitive signal collector is fixed at the other end of the mounting rod. According to the liquid level detection device, laser emitted by the laser emitter is reflected to different positions of the photosensitive signal collector through vertical movement of the floater, then the purpose of liquid level detection is achieved, the structure is simple, monitoring equipment can be isolated from liquid through non-contact monitoring and the light-transmitting film, and the operation safety of the monitoring equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photosensitive liquid level gauges, and specifically relates to a float type single-tube photosensitive liquid level gauge. Background Art

[0002] A photosensitive liquid level gauge, also known as an optoelectronic liquid level sensor, is a contact type point liquid level measurement and control device that works based on the principles of reflection and refraction of light at the interface of two different media. The main features of this sensor are accurate liquid level detection, high repeatability accuracy, and little influence on the measured medium.

[0003] During the process of using optoelectronic equipment for liquid level detection, although the monitoring equipment during detection does not come into direct contact with the liquid level, there is still a certain degree of evaporation of the liquid. When using volatile liquids such as gasoline, there are still some liquid beads adhering to the monitoring equipment. Therefore, in order to extend the service life of the monitoring equipment, it is necessary to design a photosensitive liquid level gauge that can reduce or even avoid liquid contact. Content of the Utility Model

[0004] The purpose of the utility model is to provide a float type single-tube photosensitive liquid level gauge to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: It includes a single-tube main body, a bottom shell, and an end cover. The end cover and the bottom shell are respectively fixed at the upper and lower ends of the single-tube main body. A float is movably installed inside the single-tube main body. A connecting pipe is fixed on the bottom shell. An insertion head is fixed at the bottom of the end cover and is inserted into the single-tube main body. An installation groove is opened at the center position of the bottom of the insertion head. An installation rod is fixed in the installation groove. One end of the installation rod is fixed with a laser emitter, and the other end is fixed with a photosensitive signal collector. A reflector is fixed at the upper end of the float. A light-transmitting film is clamped at the opening at the bottom of the installation groove. A display electrically connected to the photosensitive signal collector is fixed on the outer side of the single-tube main body.

[0006] Preferably, a ventilation pipe is fixed on the outer side of the single-tube main body and below the insertion head.

[0007] Preferably, an outer ring notch is opened on the outer side of the upper end of the reflector, and an inner ring notch is opened on the inner side. A black film is fixed between the float and the reflector.

[0008] Preferably, an alarm is fixed at the upper end of the end cover.

[0009] Preferably, an outer groove is opened on the periphery of the bottom of the insertion head. A sleeve is clamped in the outer groove. An anti-slip pad is fixed on the inner side of the sleeve. The periphery of the light-transmitting film is clamped between the sleeve and the side wall of the outer groove.

[0010] Preferably, the laser emitter is inclined with respect to the device and its extending direction is aligned with the central position at the bottom of the single-tube body.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: By utilizing the up-and-down movement of the float, the laser emitted by the laser emitter is reflected to different positions of the photosensitive signal collector, thereby achieving the purpose of liquid level detection. The structure is simple, the monitoring is non-contact, and the monitoring device can be isolated from the liquid by using the light-transmitting film, which increases the operating safety of the monitoring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 FIG. is a schematic side cross-sectional structure diagram of a float-type single-tube photosensitive liquid level gauge of the present utility model;

[0013] Figure 2 FIG. is a schematic diagram of the upper end structure of the float of a float-type single-tube photosensitive liquid level gauge of the present utility model;

[0014] Figure 3 FIG. is a schematic diagram of the installation combination structure of the light-transmitting film of a float-type single-tube photosensitive liquid level gauge of the present utility model.

[0015] In the figure: 1, single-tube body; 2, bottom shell; 21, connecting pipe; 3, end cover; 31, insertion head; 32, installation groove; 33, installation rod; 34, laser emitter; 35, photosensitive signal collector; 36, outer groove; 37, light-transmitting film; 38, ferrule; 39, anti-slip pad; 4, float; 41, reflector; 42, outer ring notch; 43, inner ring notch; 44, black film; 5, display; 6, alarm; 7, ventilation pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0017] Please refer to Figures 1-3, the present utility model provides a technical solution: including a single-tube main body 1, a bottom shell 2 and an end cap 3. The end cap 3 and the bottom shell 2 are respectively fixed at the upper and lower ends of the single-tube main body 1. A float 4 is movably installed in the single-tube main body 1. A connecting pipe 21 is fixed on the bottom shell 2. An insertion head 31 is fixed at the bottom of the end cap 3 and is inserted into the single-tube main body 1. An installation groove 32 is opened at the center position of the bottom of the insertion head 31. An installation rod 33 is fixed in the installation groove 32. One end of the installation rod 33 is fixed with a laser emitter 34, and the other end is fixed with a photosensitive signal collector 35. A reflecting mirror 41 is fixed at the upper end of the float 4. A light-transmitting film 37 is clamped at the bottom opening of the installation groove 32. A display 5 electrically connected to the photosensitive signal collector 35 is fixed on the outer side of the single-tube main body 1. A ventilation pipe 7 is fixed on the outer side of the single-tube main body 1 and below the insertion head 31.

[0018] An outer ring notch 42 is opened on the outer side of the upper end of the reflecting mirror 41, and an inner ring notch 43 is opened on the inner side. A black film 44 is fixed between the float 4 and the reflecting mirror 41. An alarm 6 is fixed at the upper end of the end cap 3.

[0019] An outer edge groove 36 is opened on the periphery of the bottom of the insertion head 31. A sleeve 38 is clamped in the outer edge groove 36. An anti-slip pad 39 is fixed on the inner side of the sleeve 38. The periphery of the light-transmitting film 37 is clamped between the sleeve 38 and the side wall of the outer edge groove 36. The laser emitter 34 is inclined, and the extending direction is aligned with the center position of the bottom of the single-tube main body 1.

[0020] Working principle: First, connect the whole device to an external power supply, and use the connecting pipe 21 to communicate with the tank to be measured, so that the liquid level in the tank is the same as the liquid level in the single-tube main body 1. At this time, the height of the float 4 is the same as the liquid level in the tank. On this basis, use the laser emitter 34 to emit laser, and after being reflected by the reflecting mirror 41, it irradiates on the photosensitive signal collector 35. At this time, if the height of the float 4 changes, it will cause the position where the laser irradiates on the photosensitive signal collector 35 to change, thereby achieving the purpose of liquid level monitoring. Among them, the higher the height of the float 4, the farther the position where the laser irradiates on the reflecting mirror 41 is from the center position, and vice versa. When the laser irradiates on the outer ring notch 42 or the inner ring notch 43, the laser cannot be reflected normally, and thus the photosensitive signal collector 35 cannot receive the laser signal, and finally the alarm 6 can be triggered. During the whole monitoring process, the light-transmitting film 37 can keep the laser emitter 34 and the photosensitive signal collector 35 in a relatively sealed environment, avoiding the liquid volatilization from adhering to their surfaces and causing corrosion, achieving the purpose of extending the service life. And when the end cap 3 is removed without pulling out the sleeve 38 on the insertion head 31, the light-transmitting film 37 can be quickly replaced, and the overall operation is simple and convenient.

[0021] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or apparatus.

[0022] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A float-type single-tube photosensitive liquid level gauge, comprising a single-tube body (1), a bottom shell (2) and an end cover (3), characterized in that: The end cover (3) and the bottom shell (2) are respectively fixed to the upper and lower ends of the single-tube body (1); a float (4) is movably installed in the single-tube body (1); a connecting tube (21) is fixed on the bottom shell (2); an insertion head (31) is fixed at the bottom of the end cover (3) and is inserted into the single-tube body (1); a mounting groove (32) is provided at the center of the bottom of the insertion head (31); a mounting rod (33) is fixed in the mounting groove (32); a laser emitter (34) is fixed at one end of the mounting rod (33) and a photosensitive signal collector (35) is fixed at the other end; a reflector (41) is fixed at the upper end of the float (4); a light-transmitting film (37) is clamped at the bottom opening of the mounting groove (32); and a display (5) electrically connected to the photosensitive signal collector (35) is fixed on the outside of the single-tube body (1).

2. A float type single tube photosensitive liquid level gauge according to claim 1, characterized in that: A ventilation tube (7) is fixed outside the single-tube body (1) and below the insertion head (31).

3. A float type single tube photosensitive liquid level gauge according to claim 1, characterized in that: An outer ring notch (42) is formed on the outer side of the upper end of the reflector (41), and an inner ring notch (43) is formed on the inner side. A black film (44) is fixed between the float (4) and the reflector (41).

4. A float type single tube photosensitive liquid level gauge according to claim 1, characterized in that: An alarm (6) is fixed to the upper end of the end cover (3).

5. The float type single tube photosensitive liquid level gauge according to claim 1, characterized in that: An outer groove (36) is formed on the periphery of the bottom of the insertion head (31), a clamping sleeve (38) is clamped inside the outer groove (36), an anti-slip pad (39) is fixed inside the clamping sleeve (38), and the outer periphery of the light-transmitting film (37) is clamped between the clamping sleeve (38) and the side wall of the outer groove (36).

6. A float type single tube photosensitive liquid level gauge according to claim 1, characterized in that: The laser emitter (34) is a tilted device, and its extension direction is aligned with the center position of the bottom of the single-tube body (1).

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