CN208721195U - Sensor jacket, liquid level detection device and liquid level detection system - Google Patents

Abstract

The utility model provides a kind of sensor jacket, liquid level detection device and liquid level detection system, it is related to Technology of Level Detection field, sensor jacket provided by the utility model includes: protection pipe and float piece, the float piece is slidably connected to the protection pipe along the axial direction of the protection pipe, and the float piece is transparent along the axial direction of the protection pipe, sensor jacket provided by the utility model solves during level sensing, fog covers sensor, the technical issues of influencing detection accuracy, it is possible to prevente effectively from influence of the fog to level sensing, it is protected suitable for volatile liquid level sensor, be conducive to improve detection accuracy.

Description

Sensor jacket, liquid level detection device and liquid level detection system

Technical field

The utility model relates to Technology of Level Detection fields, more particularly, to a kind of sensor jacket, liquid level detection device And liquid level detection system.

Background technique

Photoelectric liquid level sensor is that reflected refraction principle occurs in two kinds of extended medias using light, is a kind of Novel connecting Touch point liquid-level measuring-controlling apparatus.Photoelectric liquid level sensor is simple with structure, positioning accuracy is high, without mechanical part, is not required to adjust Examination, high sensitivity and corrosion-resistant, little power consumption, it is small in size many advantages, such as, also have high temperature resistant, it is high pressure resistant, be able to bear strong corrosion, chemistry Property is stablized, and influences the features such as small to measured medium.

In addition, fibre optic liquid level sensor can be by the difference of different liquid level reflection light intensity, to generate difference Analog voltage, to realize level sensing.In liquid nitrogen level detection, due to liquid nitrogen highly volatile, thus easily in sensor Upper generation fog, so that shield lights, influence level sensing precision.

In addition, being necessary to ensure that liquid nitrogen container seals for the level sensing of liquid nitrogen, in the level sensing for carrying out multiple liquid nitrogen containers When, traditional liquid level detection system needs to carry out sensor installation to multiple liquid nitrogen containers one by one, and operation is time-consuming and laborious, and easily leads to Liquid nitrogen leakage.

Utility model content

In view of this, the purpose of this utility model is to provide the inspections of a kind of sensor jacket, liquid level detection device and liquid level The technical issues of examining system, during solving level sensing, fog covers sensor, influences detection accuracy.

In a first aspect, sensor jacket provided by the utility model, comprising: protection pipe and float piece, the float piece edge The axial direction of the protection pipe is slidably connected to the protection pipe, and the float piece is transparent along the axial direction of the protection pipe.

With reference to first aspect, the utility model provides the first possible embodiment of first aspect, wherein described Float piece is sheathed on the protection pipe, and one end that the protection pipe and the float piece cooperate is fixedly connected with boss, described floating One end of drift part and protection pipe cooperation is connected with end cap, and the protection pipe is slidably connected to the end cap.

The possible embodiment of with reference to first aspect the first, the utility model provide first aspect second can The embodiment of energy, wherein be provided with concave ring groove on the boss, sealing ring, the sealing ring are provided in the concave ring groove Between the boss and the float piece.

With reference to first aspect, the utility model provides the third possible embodiment of first aspect, wherein described Float piece includes casing and floating body, and described sleeve pipe is slidably connected to the protection pipe, and the floating body is connected to described sleeve pipe Away from one end of the protection pipe, one end that the floating body is connect with described sleeve pipe is provided with opening, and connects with described sleeve pipe It is logical；The floating body is closed at one end and transparent away from described sleeve pipe.

The third possible embodiment with reference to first aspect, the utility model provide first aspect the 4th kind can The embodiment of energy, wherein the floating body is planar structure, the planar structure and the set away from one end of described sleeve pipe Pipe axis is vertical.

Second aspect, liquid level detection device provided by the utility model, comprising: mentioned including liquid level sensor and first aspect The sensor jacket of confession, the liquid level sensor are connected to one end that the protection pipe deviates from the float piece.

In conjunction with second aspect, the utility model provides the first possible embodiment of second aspect, wherein described Liquid level sensor includes dianegative, shell and fibre optical sensor, and the dianegative connects the protection pipe, and the shell connects It connects and deviates from the side of the protection pipe in the dianegative, form cavity between the dianegative and the shell, it is described Fibre optical sensor is arranged in the cavity.

In conjunction with the first possible embodiment of second aspect, the utility model provide second aspect second can The embodiment of energy, wherein the liquid level detection device further includes sealing shroud, and one end of the sealing shroud is sheathed on the protection Pipe, the other end of the sealing shroud are connected to the liquid level sensor.

In conjunction with second of possible embodiment of second aspect, the utility model provide second aspect the third can The embodiment of energy, wherein one end that the sealing shroud is connect with the liquid level sensor is provided with stomata, and the stomata runs through The side wall of the sealing shroud, and be connected to the protection pipe.

The third aspect, liquid level detection system provided by the utility model are provided including host, host computer and second aspect Liquid level detection device, the host computer and the liquid level sensor are connected with the host respectively.

The utility model embodiment brings following the utility model has the advantages that the axial direction sliding using float piece along protection pipe connects It is connected to protection pipe, and the mode that float piece is transparent along the axial direction of protection pipe, is contacted by float piece with liquid level, to make float piece The light transmission path without fog is formed between protection pipe, so that fog effectively be avoided to be suitable for the influence of level sensing Volatile liquid level sensor protection, is conducive to improve detection accuracy.

To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and Cooperate appended attached drawing, is described in detail below.

Detailed description of the invention

Technical solution in order to illustrate more clearly of specific embodiment of the present invention or in the related technology, below will be right Attached drawing needed in specific embodiment or description of Related Art is briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the schematic diagram for the sensor jacket that the utility model embodiment one provides；

Fig. 2 is the cross-sectional view for the sensor jacket that the utility model embodiment one provides；

Fig. 3 is that the protection pipe for the sensor jacket that the utility model embodiment one provides and float piece fit structure are illustrated Figure；

Fig. 4 is the cross-sectional view of the float piece for the sensor jacket that the utility model embodiment one provides；

Fig. 5 is the schematic diagram for the liquid level detection device that the utility model embodiment two provides；

Fig. 6 is the liquid level sensor cross-sectional view for the liquid level detection device that the utility model embodiment two provides；

Fig. 7 is the cross-sectional view of the sealing shroud for the liquid level detection device that the utility model embodiment two provides；

Fig. 8 is the schematic diagram for the liquid level detection system that the utility model embodiment three provides.

Icon: 1- protection pipe；11- boss；2- float piece；21- casing；22- floating body；3- end cap；4- sealing shroud；41- Stomata；5- liquid level sensor；51- dianegative；52- shell；53- fibre optical sensor；6- host；61- controller；62- first Indicator light；The second indicator light of 63-；7- host computer.

Specific embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical Novel protected range.

It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition The concrete meaning of language in the present invention.

Embodiment one

As depicted in figs. 1 and 2, sensor jacket provided by the embodiment of the utility model, comprising: protection pipe 1 and float piece 2, float piece 2 is slidably connected to protection pipe 1 along the axial direction of protection pipe 1, and float piece 2 is transparent along the axial direction of protection pipe 1.

Wherein, 2 inside hollow out of float piece, and it is closed away from one end of protection pipe 1, thus when float piece 2 is contacted with liquid level When, float piece 2 can float on liquid level；Float piece 2 is transparent along the axial direction of protection pipe 1, so that light may pass through protection pipe 1 and float It floats part 2 and irradiates liquid level, and reflect passback sensor through liquid level, due to light diffuse reflection effect, light transfer route is longer, is reflected back The intensity of illumination of sensor is lower, so as to the simulation by the light intensity being reflected back as spacing between liquid level and sensor Amount, and then realize level sensing；, can be different according to reflecting properties of the liquid degree of purity to light using liquid level reflection light, To carry out purity liquid detection.

It should be noted that float piece 2 is partially submerged in a liquid away from one end of protection pipe 1, thus lead to sensor The distance between tested liquid level increases, and the distance of increase can be according to the quality sum of float piece 2 and protection pipe 1, and is tested The density of liquid solves.That is the corresponding liquid quality of volume of the submergence of float piece 2 in a liquid is equal to float piece 2 and protection pipe 1 Quality sum.In addition, can be counted according to the area of section (liquid level area) of tested flow container and the submergence volume of float piece 2 Liquid level lifting height caused by float piece 2 submerges is calculated, thus can be accurately calculated when float piece 2 is detached from liquid level, the reality of liquid level Highly.It should be noted that being protected by protection pipe 1 and float piece 2 optical path of sensor, so as to avoid volatile Liquid generate fog shield lights transmitting, thus can accurately realize level sensing；Protection pipe 1 and float piece 2 should all be using light Material, to reduce displacement when float piece 2 floats, and then the liquid level that can ignore 2 contact position of float piece reduces height； When the area of tested liquid level is larger, 2 periphery liquid level lifting height of float piece caused by float piece 2 submerges also can be ignored.

Further, float piece 2 is transparent along the axial direction of protection pipe 1, so as to transmission ray, and then makes Fibre Optical Sensor The light that device 53 issues exposes to liquid level, and through liquid level reflected light fiber sensor 53, here by the direct reflection light of liquid level, To realize that liquid level detects；In addition, also reflective paster can be added on the end face opposite with protection pipe 1 of float piece 2, to make Float piece 2 forms mirror surface away from the side of liquid level, carried out by float piece 2 it is reflective, to can not only play antifogging action, and And it can influence to avoid different liquids reflector efficiency difference to detection accuracy.

As shown in figure 3, float piece 2 is sheathed on protection pipe 1, protection pipe 1 and float piece 2 in the utility model embodiment One end of cooperation is fixedly connected with boss 11, and one end that float piece 2 and protection pipe 1 cooperate is connected with end cap 3, and protection pipe 1 is slided It is connected to end cap 3.Wherein, float piece 2 is socketed protection pipe 1, to make float piece 2 and protection pipe 1 can be relatively sliding in the axial direction It is dynamic, and then ensure that float piece 2 is contacted with liquid level, end cap 3 is fixedly connected with protection pipe 1, and the inner ring diameter of end cap 3 is greater than protection pipe 1 overall diameter, and it is less than the overall diameter of boss 11, boss 11 is between end cap 3 and float piece 2, to be avoided by end cap 3 Protection pipe 1 is separated with the sliding of float piece 2.

Further, it is provided with concave ring groove on boss 11, sealing ring is provided in concave ring groove, sealing ring is located at 11 He of boss Between float piece 2.Wherein, seal ring set is connected to boss 11, and is embedded in concave ring groove, to realize sealing ring in 1 axis of protection pipe The fixation in direction.Sealing ring is for being sealed protection pipe 1 and float piece 2, so that the gas leakage for avoiding liquid nitrogen from volatilizing, is It is smooth to ensure that boss 11 is slided along float piece 2, lubricating oil can be coated between sealing ring and float piece 2.

As shown in figure 4, float piece 2 includes casing 21 and floating body 22, casing 21 is slidably connected to protection pipe 1, floating body 22 are connected to one end that casing 21 deviates from protection pipe 1, and one end that floating body 22 is connect with casing 21 is provided with opening, and and casing 21 connections；Floating body 22 is closed at one end and transparent away from casing 21.Wherein, casing 21 and floating body 22 are all made of lightweight modeling Expect material, and 22 inside hollow out of floating body, to mitigate weight, and then reduces displacement when float piece 2 floats.Fibre Optical Sensor The light that device 53 issues successively passes through protection pipe 1, casing 21 and floating body 22 and is radiated in liquid levels, and reflects through liquid level Afterwards, fibre optical sensor 53 successively is passed back to through floating body 22, casing 21 and protection pipe 1.

Floating body 22 is planar structure away from one end of casing 21, and planar structure is vertical with 21 axis of casing.Light is along set The axis of pipe 21 transmits, and planar structure is vertical with 21 axis of casing, and planar structure is contacted with liquid level, to make light vertical irradiation Liquid level, and it is reflected back liquid level sensor 5, and then avoid light transmission dispersion.

Embodiment two

As shown in figure 5, liquid level detection device provided by the embodiment of the utility model, comprising: liquid level sensor 5 and embodiment One sensor jacket provided, liquid level sensor 5 are connected to one end that protection pipe 1 deviates from float piece 2.

Specifically, liquid level sensor 5 is used to emit beam and receive the light of liquid level reflection, by identifying liquid level reflected light The illuminance of line as the analog quantity of liquid level sensor 5 and liquid level distance, and then realizes level sensing.Sensor jacket is used for Transmission ray, and avoid evaporating and generate fog masking liquid level sensor 5, so that it is guaranteed that light transmission is smooth.

As shown in fig. 6, liquid level sensor 5 includes dianegative 51, shell 52 and optical fiber in the utility model embodiment Sensor 53, dianegative 51 connect protection pipe 1, and shell 52 is connected to the side that dianegative 51 deviates from protection pipe 1, transparent Cavity is formed between bottom plate 51 and shell 52, fibre optical sensor 53 is set in cavity.Dianegative 51 and shell 52 are used for Fibre optical sensor 53 is protected, the light that fibre optical sensor 53 issues can expose to liquid level by dianegative 51, and liquid level is reflected back Light fibre optical sensor 53 can be transferred to by dianegative 51, the liquid level of model FU-95S can be selected in fibre optical sensor 53 FIBER OPTIC SENSORS.

Liquid level detection device further includes sealing shroud 4, and one end of sealing shroud 4 is sheathed on protection pipe 1, the other end of sealing shroud 4 It is connected to liquid level sensor 5.By taking liquid nitrogen level detects as an example, through-hole is arranged in liquid nitrogen tank body upper cover, and sealing shroud 4 is plugged on through-hole In, protection pipe 1 is plugged in sealing shroud 4, and sealing shroud 4 selects polyurethane foamed material, protection pipe 1 and liquid nitrogen tank body upper cover with Sealing shroud 4 is tightly connected, to prevent liquid nitrogen vaporization from leaking.

One end that sealing shroud 4 is connect with liquid level sensor 5 is provided with stomata 41, and stomata 41 runs through the side wall of sealing shroud 4, and It is connected to protection pipe 1.In use, sealing shroud 4 is fixedly connected in the through-hole of liquid nitrogen tank body upper cover, and stomata 41 is made to be located at liquid Outside nitrogen tank body, so that the air between float piece 2 and protection pipe 1 can pass through stomata when float piece 2 is slided along protection pipe 1 41 flow freely, so that it is guaranteed that float piece 2 and protection pipe 1 slide it is smooth.

Embodiment three

Liquid level detection system provided by the embodiment of the utility model, comprising: mentioned including host 6, host computer 7 and embodiment two The liquid level detection device of confession, host computer 7 and liquid level sensor 5 are connected with host 6 respectively.Wherein, host 6 includes controller 61, the first indicator light 62 and the second indicator light 63, the first indicator light 62 and the second indicator light 63 are connected with controller 61 respectively It connects, fibre optical sensor 53 is connected with controller 61, and it is that host 6 and fibre optical sensor 53 are powered that battery, which can be used, and optical fiber passes The electric signal that reflected light generates is transferred to controller 61 by sensor 53, and controller 61 is for calculating liquid level numerical value, and by liquid level number Value is sent to host computer 7, and host computer 7 includes display, and display is for showing liquid level numerical value.In addition, multiple liquid levels can be examined It surveys device and is connected to multiple liquid nitrogen tank bodies correspondingly, be respectively used to detect the liquid nitrogen level in different liquid nitrogen containers, use one A host 6 connects multiple liquid level detection devices one by one, and the level sensing to multiple liquid nitrogen containers may be implemented, easy to detect quick, Without repeated disassembled and assembled liquid level detection device, can be leaked to avoid liquid nitrogen.

Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new The range of each embodiment technical solution of type.

Claims (10)

1. a kind of sensor jacket characterized by comprising protection pipe (1) and float piece (2), the float piece (2) is along described The axial direction of protection pipe (1) is slidably connected to the protection pipe (1), and the float piece (2) is along the axis of the protection pipe (1) To transparent.

2. sensor jacket according to claim 1, which is characterized in that the float piece (2) is sheathed on the protection pipe (1), the protection pipe (1) and the float piece (2) cooperation one end be fixedly connected with boss (11), the float piece (2) with One end of protection pipe (1) cooperation is connected with end cap (3), and the protection pipe (1) is slidably connected to the end cap (3).

3. sensor jacket according to claim 2, which is characterized in that be provided with concave ring groove on the boss (11), institute It states and is provided with sealing ring in concave ring groove, the sealing ring is between the boss (11) and the float piece (2).

4. sensor jacket according to claim 1, which is characterized in that the float piece (2) includes casing (21) and drift Floating body (22), described sleeve pipe (21) are slidably connected to the protection pipe (1), and the floating body (22) is connected to described sleeve pipe (21) Away from one end of the protection pipe (1), one end that the floating body (22) connect with described sleeve pipe (21) is provided with opening, and with Described sleeve pipe (21) connection；The floating body (22) is closed at one end and transparent away from described sleeve pipe (21).

5. sensor jacket according to claim 4, which is characterized in that the floating body (22) deviates from described sleeve pipe (21) One end be planar structure, the planar structure is vertical with described sleeve pipe (21) axis.

6. a kind of liquid level detection device, which is characterized in that the liquid level detection device includes liquid level sensor (5) and claim The described in any item sensor jackets of 1-5, the liquid level sensor (5) are connected to the protection pipe (1) away from the float piece (2) one end.

7. liquid level detection device according to claim 6, which is characterized in that the liquid level sensor (5) includes clear bottom Plate (51), shell (52) and fibre optical sensor (53), the dianegative (51) connect the protection pipe (1), the shell (52) side that the dianegative (51) deviate from the protection pipe (1), the dianegative (51) and the shell are connected to (52) cavity is formed between, fibre optical sensor (53) setting is in the cavity.

8. liquid level detection device according to claim 7, which is characterized in that the liquid level detection device further includes sealing shroud (4), one end of the sealing shroud (4) is sheathed on the protection pipe (1), and the other end of the sealing shroud (4) is connected to the liquid Level sensor (5).

9. liquid level detection device according to claim 8, which is characterized in that the sealing shroud (4) and the level sensing Device (5) connection one end be provided with stomata (41), the stomata (41) run through the sealing shroud (4) side wall, and with the guarantor Pillar (1) connection.

10. a kind of liquid level detection system, which is characterized in that including any one of host (6), host computer (7) and claim 6-9 institute The liquid level detection device stated, the host computer (7) and the liquid level sensor (5) are connected with the host (6) respectively.