CN220751299U - Resistance type liquid level meter and heating device - Google Patents

Abstract

The utility model relates to a resistance type liquid level meter and a heating device. The resistance type liquid level meter comprises: a probe having a probe end; the insulation sleeve is sleeved outside the probe; and a mounting joint mounted to the insulating sleeve. The insulating sleeve comprises a first sleeve part positioned on one side of the installation joint close to the detection end, and a groove is formed in the outer side wall surface of the first sleeve part. According to the resistance type liquid level meter, the groove is formed in the outer side wall surface of the insulating sleeve, so that the possibility of forming a complete water film on the outer side wall surface of the insulating sleeve is reduced, misleading of the resistance type liquid level meter is prevented, and the measurement accuracy of the resistance type liquid level meter is improved. The resistance type liquid level meter has the advantages of simple structure, convenient use and low cost.

Description

Resistance type liquid level meter and heating device

Technical Field

The utility model relates to the technical field of measurement, in particular to a resistance type liquid level meter and a heating device using the resistance type liquid level meter.

Background

The current resistance type liquid level meter is widely applied to various industries due to the simple structure and low cost. The basic structure of the existing resistance type liquid level meter consists of a metal probe, a copper joint, an insulating sleeve and the like. When the device is used in a steam environment, a layer of water film may be attached to the insulating sleeve, so that insulation is invalid, and the resistance type liquid level meter is turned on by mistake, so that erroneous measurement is caused.

Disclosure of Invention

The main purpose of the embodiment of the utility model is to provide a resistance type liquid level meter and a heating device using the resistance type liquid level meter, and by arranging a groove on the outer side wall surface of an insulating sleeve of the resistance type liquid level meter, a water film on the insulating sleeve is disconnected at the groove, so that the possibility of forming a complete water film on the insulating sleeve is reduced, the water film on the insulating sleeve is further prevented from being contacted with a probe, and the error conduction of the resistance type liquid level meter is prevented.

The embodiment of the utility model provides a resistance type liquid level meter, which comprises:

a probe having a probe end;

the insulation sleeve is sleeved outside the probe; and

a mounting joint mounted to the insulating sleeve;

the insulating sleeve comprises a first sleeve part which is positioned on one side of the installation joint close to the detection end, and a groove is formed in the outer side wall surface of the first sleeve part.

In some exemplary embodiments, the groove is annular.

In some exemplary embodiments, the groove includes a first end surface remote from the probe end, the first end surface connecting a bottom surface of the groove and an outer sidewall surface of the first sleeve portion, and the first end surface being inclined in a direction from the outer sidewall surface of the first sleeve portion toward the bottom surface of the groove, the first end surface facing away from the probe end.

In some exemplary embodiments, the first end surface is a conical surface.

In some exemplary embodiments, the groove includes a second end surface proximate the probe end, the second end surface connecting the bottom surface of the groove and the outer sidewall surface of the first sleeve portion, and the second end surface being inclined in a direction away from the probe end in a direction from the outer sidewall surface of the first sleeve portion toward the bottom surface of the groove.

In some exemplary embodiments, the second end surface is a conical surface.

In some exemplary embodiments, the groove is disposed at an end of the first sleeve portion proximate the mounting tab.

In some exemplary embodiments, the mounting joint is a metallic joint or a non-metallic joint.

In some exemplary embodiments, the probe is a metal probe.

In some exemplary embodiments, the resistive level gauge further comprises:

and the sealing piece is arranged between the mounting joint and the insulating sleeve.

The embodiment of the utility model also provides a heating device, which comprises:

a liquid container;

a heating assembly configured to heat the liquid in the liquid container; and

the resistive level gauge of any of the above embodiments, mounted to the liquid container via the mounting joint, and configured to detect a liquid level within the liquid container.

According to the resistance type liquid level meter, the grooves are formed in the outer side wall surface of the insulating sleeve of the resistance type liquid level meter, so that the resistance type liquid level meter is prevented from being misled, the precision of the resistance type liquid level meter is improved, and the safe and stable operation of the heating device is ensured. The resistance type liquid level meter has the advantages of simple structure, convenient use, low cost and easy popularization.

Drawings

FIG. 1 is a schematic cross-sectional view of a resistance type level gauge according to an embodiment of the present utility model;

fig. 2 is a schematic view of the insulation sleeve of the resistance type liquid level meter shown in fig. 1.

Reference numerals:

a 100-resistance type liquid level meter,

1-probe, 11-probe end, 2-insulating sleeve, 21-first sleeve portion, 211-groove, 2111-first end face, 2112-second end face, 2113-bottom face, 3-mounting tab, 31-first tab, 32-second tab, 4-seal, 5-terminal.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

The embodiment of the application provides a resistance type liquid level meter 100 and a heating device, wherein the resistance type liquid level meter 100 is applied to the heating device.

Referring to fig. 1-2, an embodiment of the present application provides a resistance type level gauge 100 including a probe 1, an insulating sleeve 2, and a mounting joint 3. The probe 1 has a probe end 11. The insulating sleeve 2 is sleeved outside the probe 1. The installation tabs 3 are mounted to the insulating sleeve 2. The detection end 11 of the probe 1 is immersed in the liquid to be detected, so that the resistance type liquid level meter 100 is communicated with the liquid to be detected, and when the liquid level changes, the resistance between the electrodes of the resistance type liquid level meter 100 changes, and the liquid level condition is reflected through the resistance change. An insulating sleeve 2 is installed outside the probe 1, insulating the probe 1 from a mounting joint 3 mounted to the insulating sleeve 2. The mounting fitting 3 is used to mount the resistance level gauge 100 to a device for an intended application (e.g., a liquid container for a heating device, etc.).

Wherein the insulating sleeve 2 comprises a first sleeve part 21 positioned on the side of the mounting joint 3 close to the detection end 11, and a groove 211 is formed on the outer side wall surface of the first sleeve part 21.

The first sleeve part 21 of the insulating sleeve 2 is close to the detection end 11, and after the resistance type liquid level meter 100 is mounted to the liquid container of the heating device, the first sleeve part 21 and the detection end 11 of the probe 1 can extend into the liquid container. The liquid to be measured in the liquid container is heated to generate steam, and the steam is condensed on the outer side wall surface of the first sleeve part 21 to form a water film. Grooves 211 are provided on the outer side wall surface of the first sleeve portion 21, and the grooves 211 break the continuous outer side wall surface of the first sleeve portion 21, making it difficult to form a continuous water film. Specifically, when the water film contacts the grooves 211, the surface tension of the water film may be disturbed, making it difficult to form a stable shape on the surfaces of the grooves 211.

According to the resistance type liquid level meter 100, the groove 211 is formed in the outer side wall surface of the first sleeve part 21, close to the detection end 11, of the insulating sleeve 2, so that a continuous water film cannot be formed on the outer side wall surface of the first sleeve part 21, insulation failure caused by contact between the water film on the insulating sleeve 2 and the probe 1 is prevented, erroneous conduction of the resistance type liquid level meter 100 is prevented, and measurement accuracy of the resistance type liquid level meter 100 is improved.

In some exemplary embodiments, as shown in fig. 1, the probe 1 may be vertically disposed, the probe end 11 may be located at a lower portion of the probe 1, and the first sleeve portion 21 is located at a lower portion of the insulation sleeve 2 and disposed at an underside of the mounting tab 3.

In some exemplary embodiments, as shown in fig. 1 and 2, the recess 211 is annular.

The annular groove 211 is formed in the circumferential direction of the outer side wall surface of the first sleeve portion 21 such that the outer side wall surface of the first sleeve portion 21 is interrupted by the groove 211 in the entire circumferential direction. As the water flows through the annular groove 211, a portion of the water reaches the bottom of the groove 211, and the continuity of the water film is broken. The annular recess 211 further reduces the likelihood of forming a continuous film of water, thereby preventing insulation failure and false conduction of the resistive level gauge 100.

It should be understood that the present application is not limited to annular recess 211. The shape and depth of the grooves 211 (depth of the outer sidewall surface recessed into the first sleeve portion 21) may be set according to the specific application to ensure that the grooves 211 are effective in preventing the formation of a water film.

In some exemplary embodiments, as shown in fig. 2, the recess 211 includes a first end surface 2111 remote from the probe end 11, the first end surface 2111 connecting a bottom surface 2113 of the recess 211 and an outer sidewall surface of the first sleeve portion 21, and the first end surface 2111 being inclined in a direction away from the probe end 11 from the outer sidewall surface of the first sleeve portion 21 toward the bottom surface 2113 of the recess 211.

Since the first end surface 2111 is inclined away from the probe end 11 in a direction from the outer side wall surface of the first sleeve portion 21 toward the bottom surface 2113 of the groove 211, i.e., in fig. 1 and 2, when water on the outer side wall surface of the first sleeve portion 21 flows down to the junction of the outer side wall surface of the first sleeve portion 21 and the first end surface 2111, it cannot flow up along the first end surface 2111, but drops under the action of gravity, preventing water from accumulating in the groove 211, and thus forming a continuous water film on the first sleeve portion 21. Further, the water formed on the first end surface 2111 may flow down along the first end surface 2111 to the junction of the outer side wall surface of the first sleeve portion 21 and the first end surface 2111, and then drip down without flowing into the groove 211.

Thus, the provision of the first end face 2111 prevents the water on the outer side wall face of the first sleeve portion 21 and the first end face 2111 from collecting in the groove 211, making it difficult for the water film to be continuous at the groove 211, further reducing the possibility of forming a continuous water film.

In some exemplary embodiments, as shown in fig. 2, the first end surface 2111 is a conical surface.

Due to the shape of the conical surface, the water is guided to flow down the conical surface, i.e. to the outer side wall surface of the first sleeve part 21, under the influence of gravity and finally drops. The smooth surface of the conical surface also aids in the flow of water.

It should be appreciated that the first end surface 2111 is not limited to a conical surface, but may be other surfaces that can direct water dripping and prevent water film formation, such as: concave curved surfaces, convex curved surfaces, conical surfaces, etc.

In some exemplary embodiments, as shown in fig. 2, the groove 211 includes a second end surface 2112 near the probe end 11, the second end surface 2112 connecting the bottom surface 2113 of the groove 211 and the outer side wall surface of the first sleeve portion 21, and the second end surface 2112 being inclined in a direction away from the probe end 11 from the outer side wall surface of the first sleeve portion 21 toward the bottom surface 2113 of the groove 211.

Since the second end surface 2112 is inclined in a direction away from the probe end 11 in a direction from the outer side wall surface of the first sleeve portion 21 toward the bottom surface 2113 of the groove 211, i.e., upward in fig. 1 and 2, water in the groove 211 can be guided to the outer side wall surface of the first sleeve portion 21 along the second end surface 2112 and then flows out from the outer side wall surface of the first sleeve portion 21. Thus, the second end surface 2112 guides out the water in the groove 211, avoiding the water from collecting in the groove 211 and forming a continuous water film. Thus, the provision of the second end surface 2112 further reduces the possibility of forming a continuous water film.

In some exemplary embodiments, as shown in fig. 2, the second end surface 2112 is a conical surface.

The upper part of the conical surface is narrow, the lower part is wide, and the surface is smooth, so that water can flow down along the conical surface rapidly without being blocked or detained. Thus, the second end surface 2112 is provided as a conical surface, which improves the water guiding efficiency, and prevents the grooves 211 from accumulating water to form a continuous water film.

It should be appreciated that the second end surface 2112 is not limited to a conical surface, but may be other surfaces that can direct water dripping and prevent water film formation, such as: concave curved surfaces, convex curved surfaces, conical surfaces, etc.

In some exemplary embodiments, as shown in fig. 1, a groove 211 is provided at an end of the first sleeve portion 21 near the mounting tab 3.

It should be understood that the grooves 211 may be provided at other positions of the first sleeve portion 21 as long as it prevents the formation of a continuous water film. For example, the groove 211 may be provided at an end of the first sleeve portion 21 near the detection end 11, or at a middle portion of the first sleeve portion 21.

In some exemplary embodiments, the mounting joint 3 is a metallic joint or a non-metallic joint. For example, the mounting joint 3 may be a copper joint or a ceramic joint.

Of course, the material of the mounting joint is not limited to the above, and may be other materials.

In some exemplary embodiments, as shown in fig. 1, the mounting joint 3 includes a first joint 31 and a second joint 32, the first joint 31 may be provided with internal threads, one end of the second joint 32 may be provided with external threads, and the first joint 31 and the second joint 32 are screwed. The first connector 31 and the second connector 32 can be sleeved outside the insulating sleeve 2, and the insulating sleeve 2 and the probe 1 can be clamped and fixed through the threaded connection of the first connector 31 and the second connector 32.

The mounting joint 3 can be fixed on the liquid container. Such as: the other end of the second connector 32 may be provided with external threads and may be threadably connected to a threaded bore of a fluid container. Of course, the mounting adapter 3 may also be secured to the liquid container by other means, such as: clamping, screw fixation, etc.

In some exemplary embodiments, probe 1 is a metal probe.

The probe 1 is made of a metal material and can conduct and transmit current so as to measure the passing resistance value to realize liquid level measurement. Of course, the probe 1 may be made of other conductive materials.

In some exemplary embodiments, as shown in fig. 1, the resistive level gauge 100 further includes a seal 4, the seal 4 being disposed between the mounting nipple 3 and the insulating sleeve 2.

The sealing member 4 seals between the inner side wall surface of the first joint 31 of the mounting joint 3 and the outer side wall surface of the insulating sleeve 2, so that the first sleeve part 21 and the probe end 11 positioned in the liquid container can be isolated from the external environment, and steam leakage generated after the liquid to be measured in the liquid container is heated is prevented.

In some exemplary embodiments, as shown in fig. 1, the resistive level gauge 100 further includes a connection terminal 5, where the connection terminal 5 is electrically connected to the probe 1, and the connection terminal 5 is configured to be electrically connected to a level detection circuit for level detection. Wherein the connection terminal 5 may be fixed to the probe 1 or integrally formed with the probe 1. The connection terminal 5 may be a metal terminal or may be made of a conductive material other than metal.

The embodiment of the application also provides a heating device, which comprises a liquid container, a heating assembly and the resistance type liquid level meter 100 provided by any embodiment. The heating assembly is configured to heat the liquid in the liquid container. The resistance type level gauge 100 is mounted to the liquid container through the mounting joint 3 and is configured to detect the liquid level in the liquid container.

In some exemplary embodiments, the heating device may be a boiler. Because the water in the boiler is vaporized during heating, the loss of the water is larger, and the water is continuously replenished, so that the water level in the boiler is kept at a certain height, the boiler is possibly damaged due to the fact that the water level is too low or too high, and the running safety of the boiler is risked. By adopting the resistance type liquid level meter 100, the measuring precision is high, the water level measurement is accurate, and the operation safety of the boiler is further ensured.

It should be understood that the heating device is not limited to a boiler, but may be other products such as: a steam generator, etc.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (9)

1. A resistance type level gauge, comprising:

a probe having a probe end;

the insulation sleeve is sleeved outside the probe; and

a mounting joint mounted to the insulating sleeve;

the insulation sleeve comprises a first sleeve part which is positioned on one side of the installation joint close to the detection end, a groove is formed in the outer side wall surface of the first sleeve part, and the groove is annular.

2. The resistance type liquid level gauge as claimed in claim 1, wherein the groove includes a first end surface remote from the detection end, the first end surface connecting a bottom surface of the groove and an outer side wall surface of the first sleeve portion, and the first end surface being inclined in a direction from the outer side wall surface of the first sleeve portion toward the bottom surface of the groove, the first end surface being inclined in a direction remote from the detection end.

3. The resistance gauge of claim 2, wherein the first end face is a conical face.

4. The resistance type liquid level gauge as claimed in claim 1, wherein the groove includes a second end face near the detection end, the second end face connecting a bottom face of the groove and an outer side wall face of the first sleeve portion, and being inclined in a direction from the outer side wall face of the first sleeve portion toward the bottom face of the groove, the second end face being inclined in a direction away from the detection end.

5. The resistive liquid level gauge of claim 4 wherein the second end surface is a conical surface.

6. The resistance gauge of any one of claims 1-5, wherein the groove is disposed at an end of the first sleeve portion proximate the mounting tab.

7. The resistance gauge of any one of claims 1-5, wherein the mounting joint is a metallic joint or a non-metallic joint; and/or

The probe is a metal probe.

8. The resistance gauge of any of claims 1-5, further comprising:

and the sealing piece is arranged between the mounting joint and the insulating sleeve.

9. A heating device, comprising:

a liquid container;

a heating assembly configured to heat the liquid in the liquid container; and

the resistance level gauge of any one of claims 1 to 8, mounted to the liquid container by the mounting joint, and configured to detect a liquid level within the liquid container.