Air blowing type liquid level meter nozzle and air blowing type liquid level meter

Abstract

The invention provides an air blowing type liquid level meter nozzle which comprises an air injection part, a blocking part and a restraining part, an air channel and a containing cavity which are communicated with each other are formed in the air injection part, and air passes through the air channel and the containing cavity; the blocking piece comprises an air blocking part and a floating part which are connected with each other, the buoyancy borne by the floating part in liquid is larger than the gravity of the floating part, and the air blocking part can be contained in the containing cavity and can reciprocate in the containing cavity. When the air blocking part moves to the end, close to the air outlet of the air channel, of the containing cavity, the air blocking part can block the air outlet of the air channel. The restraining piece is used for limiting the blocking piece to move in a preset space range so that the air blocking part can be contained in the containing cavity and can do reciprocating motion in the containing cavity, and a plurality of through holes are formed in the restraining piece. According to the invention, media can be prevented from returning into the air injection piece due to low air injection pressure.

Description

Technical Field

[0001] The invention relates to the technical field of air-blowing liquid level gauges, and in particular to an air-blowing liquid level gauge nozzle and an air-blowing liquid level gauge. Background Art

[0002] When measuring the liquid level, if the air pressure of the air-blowing liquid level gauge is insufficient and lower than the liquid level pressure, the measuring medium will flow back into the jet part, and in serious cases, the entire jet part will be blocked. The existing air-blowing liquid level gauge has no anti-blocking design for the air-blowing port, and the structure is designed with a needle for cleaning the blockage. In actual use, if the blockage occurs, the entire jet part is cleaned with a needle, which is difficult and takes a long time. The industry needs a simple and effective solution to solve the above technical problems. Summary of the invention

[0003] The object of the present invention is to provide an air-blowing liquid level gauge nozzle and an air-blowing liquid level gauge, which can prevent the medium from returning to the jetting part due to low jetting pressure.

[0004] To achieve the above-mentioned purpose, the present invention provides an air-blowing liquid level gauge nozzle, comprising an air-blowing member, a blocking member and a restraining member, wherein the air-blowing member is provided with an airway and a receiving chamber which are interconnected, and the airway and the receiving chamber are used to pass gas; the blocking member comprises an air-blocking portion and a floating portion which are interconnected, the buoyancy of the floating portion in the liquid being greater than its own gravity, the floating portion being able to move under the action of the buoyancy and drive the air-blocking portion to move, the air-blocking portion being able to be accommodated in the receiving chamber and being able to reciprocate in the receiving chamber, and when the air-blocking portion moves to one end of the receiving chamber close to the air outlet of the airway, the air-blocking portion is able to block the air outlet of the airway; the restraining member is used to limit the movement of the blocking member within a preset spatial range, so that the air-blocking portion can be accommodated in the receiving chamber and be able to reciprocate in the receiving chamber, and the restraining member is provided with a plurality of through holes.

[0005] Optionally, the airway and the accommodating cavity are coaxially arranged, and the inner diameter of the accommodating cavity is larger than the inner diameter of the airway.

[0006] Optionally, the accommodating cavity comprises a first sub-cavity and a second sub-cavity which are coaxially arranged, the first sub-cavity is closer to the air outlet of the airway than the second sub-cavity, and the inner diameter of the second sub-cavity is greater than the inner diameter of the first sub-cavity;

[0007] The air blocking portion includes a first substructure portion and a second substructure portion, the second substructure portion is connected to the floating portion, and the first substructure portion is used to fit with the first subcavity.

[0008] Optionally, the first substructure is in the shape of a cone, and the tip of the cone is arranged toward the air outlet of the airway.

[0009] Optionally, the second substructure portion is used to adapt to the second subcavity, and an outer diameter of the second substructure portion is smaller than an inner diameter of the second subcavity.

[0010] Optionally, the floating portion includes a floating ball, and the inner circumference of the restraining member is adapted to the floating ball, so that the air blocking portion can be accommodated in the accommodating cavity and can reciprocate in the accommodating cavity.

[0011] Optionally, there are a plurality of through holes, and the plurality of through holes are evenly distributed along the periphery of the restraining member.

[0012] The present invention also provides an air-blowing liquid level gauge, comprising any one of the above-mentioned air-blowing liquid level gauge nozzles.

[0013] Optionally, the airway, the accommodating chamber, the blocking member and the restraining member are all coaxially arranged, and the axes of the airway, the accommodating chamber, the blocking member and the restraining member are all vertically arranged.

[0014] Optionally, a jet flow regulator is also included, which can change the gas flow rate so that a balance is reached between the thrust from the gas on the blocking member, the buoyancy from the liquid on the blocking member, and the weight of the blocking member itself.

[0015] The air-blowing liquid level gauge nozzle and the air-blowing liquid level gauge provided by the present invention have the following beneficial effects:

[0016] The present invention provides an air-blowing liquid level gauge nozzle, comprising an air-blowing component, a blocking component and a restraining component, wherein the air-blowing component is provided with an airway and an accommodating chamber which are interconnected, and the airway and the accommodating chamber are used for passing gas; the blocking component comprises an air-blocking part and a floating part which are connected to each other, the buoyancy of the floating part in the liquid is greater than its own gravity, the floating part can move under the action of the buoyancy and drive the air-blocking part to move, the air-blocking part can be accommodated in the accommodating chamber and can reciprocate in the accommodating chamber, and when the air-blocking part moves to one end of the accommodating chamber close to the air outlet of the airway, the air-blocking part can cover the air outlet of the airway; the restraining component is used to limit the movement of the blocking component within a preset space range, so that the air-blocking part can be accommodated in the accommodating chamber and can reciprocate in the accommodating chamber, and the restraining component is provided with a plurality of through holes. With such a configuration, when the present invention is placed in a liquid medium, the floating part will float up because the buoyancy of the floating part in the liquid is greater than its own gravity. In addition, due to the limitation of the constraint member and the accommodating chamber, the blocking member is limited, so that the gas blocking part is limited to reciprocate in the accommodating chamber. During the floating part floating up, the floating part pushes the gas blocking part to float up, so that the gas blocking part moves to one end of the accommodating chamber close to the gas outlet of the gas channel and blocks the gas outlet of the gas channel. When the jetting member sprays gas, the blocking member is subjected to the gas thrust outward relative to the gas outlet. When the combined force of the gas thrust and the gravity of the blocking member is greater than the buoyancy of the blocking member, the blocking member will be moved away from the gas outlet until the thrust from the gas, the buoyancy from the liquid and the gravity of the blocking member reach a state of equilibrium. The hydraulic pressure and the liquid level can be calculated by using this force equilibrium state. When the liquid level fluctuation at the nozzle of the liquid level gauge becomes larger or gradually decreases during the process of closing the jet, the force balance will be destroyed. At this time, the liquid medium will push the air blocking part to move to the end of the accommodating cavity close to the air outlet of the airway and block the air outlet of the airway, thereby preventing the liquid medium from entering the airway.

[0017] The present invention also provides an air-blowing liquid level gauge, which has all the advantages of the liquid level gauge nozzle, and will not be described in detail here, because the air-blowing liquid level gauge and the liquid level gauge nozzle are based on the same inventive concept. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the overall structure of a nozzle for an air-blowing liquid level gauge provided in one embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the overall structure of an air-jet component of an air-blowing liquid level gauge nozzle provided in one embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the overall structure of a blocking member of an air-injection member of an air-blowing type liquid level gauge nozzle provided in one embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the overall structure of a restraining member of a nozzle of an air-blowing liquid level gauge provided in one embodiment of the present invention;

[0022] The accompanying drawings are denoted as follows:

[0023] 1-jet element; 11-airway; 12-accommodating chamber; 121-first sub-chamber; 122-second sub-chamber;

[0024] 2-blocking member; 21-air blocking portion; 211-first substructure; 212-second substructure; 22-floating portion; 3-restraint member; 30-through hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In addition, the structure shown in the drawings is often a part of the actual structure. In particular, the emphasis of each drawing is different, and sometimes different scales are used.

[0026] It should be understood that when an element or layer is referred to as "on...", "connected to" other elements or layers, it can be directly on other elements or layers, connected to other elements or layers, or there can be intervening elements or layers. On the contrary, when an element is referred to as "directly on...", "directly connected to" other elements or layers, there is no intervening element or layer. Although the terms first, second, third, etc. can be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish an element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present invention, the first element, component, region, layer or part discussed below can be expressed as a second element, component, region, layer or part. Spatial relationship terms such as "under...", "below", "below", "above...", "above", "above", etc., can be used here for the convenience of description to describe the relationship between an element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, the spatial relationship terms are intended to include different orientations of the devices in use and operation. For example, if the device in the accompanying drawings is turned over, then, the elements or features described as "under...", "below", "below" will be oriented to be "on" other elements or features. The device can be oriented in addition (rotated 90 degrees or other orientations) and the spatial descriptors used herein are interpreted accordingly. The purpose of the terms used herein is only to describe specific embodiments and is not intended to be a limitation of the present invention. When used herein, the singular forms of "one", "one" and "said / the" are also intended to include plural forms, unless the context clearly indicates another way. It should also be understood that the term "include" is used to determine the presence of features, steps, operations, elements and / or parts, but does not exclude the presence or addition of one or more other features, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0027] The object of the present invention is to provide an air-blowing liquid level gauge nozzle and an air-blowing liquid level gauge, which can prevent the medium from returning to the jetting part due to low air-blowing pressure.

[0028] Please refer to Figures 1 to 4 , Figure 1 A schematic diagram of the overall structure of a nozzle for an air-blowing liquid level gauge provided in one embodiment of the present invention; Figure 2 A schematic diagram of the overall structure of an air-jet component of an air-blowing liquid level gauge nozzle provided in one embodiment of the present invention; Figure 3 A schematic diagram of the overall structure of a blocking member of an air-injection member of an air-blowing type liquid level gauge nozzle provided in one embodiment of the present invention; Figure 4 The overall structure diagram of the restraining member of the nozzle of the air-blowing liquid level gauge provided by one embodiment of the present invention. Figures 1 to 4As shown, in order to achieve the above-mentioned purpose, the present invention provides an air-blowing liquid level gauge nozzle, comprising an air-blowing member 1, a blocking member 2 and a restraining member 3, wherein the air-blowing member 1 is provided with an air passage 11 and an accommodating chamber 12 which are interconnected, and the air passage 11 and the accommodating chamber 12 are used to pass the gas; the blocking member 2 comprises an air-blocking portion 21 and a floating portion 22 which are interconnected, and the buoyancy of the floating portion 22 in the liquid is greater than its own gravity, and the floating portion 22 can move under the action of the buoyancy and drive the air-blocking portion 21 to move, and the air-blocking portion 21 can move. The portion 21 can be accommodated in the accommodating chamber 12 and can reciprocate in the accommodating chamber 12. When the air blocking portion 21 moves to one end of the accommodating chamber 12 close to the air outlet of the airway 11, the air blocking portion 21 can block the air outlet of the airway 11. The restraint 3 is used to limit the movement of the blocking member 2 within a preset spatial range, so that the air blocking portion 21 can be accommodated in the accommodating chamber 12 and can reciprocate in the accommodating chamber 12. A plurality of through holes 30 are provided on the restraint 3.

[0029] With such arrangement, when the present invention is placed in a liquid medium, the floating portion 22 will float up because the buoyancy received by the floating portion 22 in the liquid is greater than its own gravity, and because of the restrictions of the constraint member 3 and the accommodating chamber 12, the blocking member 2 is restricted, so that the air blocking portion 21 is restricted to reciprocate in the accommodating chamber 12. During the floating of the floating portion 22, the floating portion 22 pushes the air blocking portion 21 to float up, so that the air blocking portion 21 moves to the end of the accommodating chamber 12 close to the air outlet of the airway 11 and blocks the air outlet of the airway 11, and the floating portion 22 can directly contact the air blocking portion 21 and establish a rigid connection to achieve synchronous movement. When the jetting member 1 sprays gas, the blocking member 2 is subjected to the outward thrust of the gas relative to the gas outlet. When the combined force of the gas thrust and the gravity of the blocking member 2 is greater than the buoyancy of the blocking member 2, the blocking member 2 will be moved away from the gas outlet until the thrust from the gas, the buoyancy from the liquid and the gravity of the blocking member 2 reach a state of equilibrium (it should be understood that the gas outlet of the airway 11 will not be blocked at this time, and the gas will be discharged freely). The balance of forces can be used to calculate the hydraulic pressure and thus the liquid level. When the liquid level fluctuation of the level gauge nozzle becomes larger or gradually decreases during the process of closing the jetting, the balance of forces will be destroyed. At this time, the liquid medium will push the gas blocking part 21 to move to the end of the accommodating chamber 12 close to the gas outlet of the gasway 11 and block the gas outlet of the gasway 11, thereby preventing the liquid medium from entering the gasway.

[0030] Specifically, the airway 11 and the accommodating chamber 12 are coaxially arranged, and the inner diameter of the accommodating chamber 12 is larger than the inner diameter of the airway 11. In this arrangement, the gas can be discharged in a straight line and the accommodating chamber 12 can also serve as a buffer space to further prevent the liquid medium from entering the airway 11.

[0031] Further, the accommodating chamber 12 includes a first sub-chamber 121 and a second sub-chamber 122 which are coaxially arranged, the first sub-chamber 121 is closer to the air outlet of the airway than the second sub-chamber 122, and the inner diameter of the second sub-chamber 122 is larger than the inner diameter of the first sub-chamber 121; the air blocking portion 21 includes a first sub-structure portion 211 and a second sub-structure portion 212, the second sub-structure portion 211 is connected to the floating portion 22, and the first sub-structure portion 211 is used to adapt to the first sub-chamber 121. In an exemplary embodiment, the first sub-structure portion 121 is in the shape of a cone, and the tip of the cone is arranged toward the air outlet of the airway 11. In this arrangement, by using the outer diameter of the cone which gradually decreases in the axial direction close to the air outlet, when the cone is pushed by the gas thrust of the jet component 1, the cone can achieve the goal of not blocking the air outlet as soon as possible.

[0032] Furthermore, the second substructure 212 is adapted to fit the second subcavity 122, and the outer diameter of the second substructure 212 is smaller than the inner diameter of the second subcavity 122. In this way, the second subcavity 122 can limit the second substructure 212 to a certain extent, ensuring that the gas blocking portion 21 can be accommodated in the accommodating cavity 12 and can reciprocate in the accommodating cavity 12, and at the same time ensuring that the gas can be discharged through the accommodating cavity 12.

[0033] Specifically, the floating portion 22 includes a floating ball, and the inner circumference of the restraining member 3 is adapted to the floating ball 22 , so that the air blocking portion 21 can be accommodated in the accommodating cavity 12 and can reciprocate in the accommodating cavity 12 .

[0034] Preferably, there are multiple through holes 30, and the multiple through holes 30 are evenly distributed along the periphery of the restraining member. This allows the liquid medium to act on the floating portion 22 through the through holes 30 better, and also limits the blocking member so that the gas blocking portion 21 can be accommodated in the accommodating chamber 12 and can reciprocate in the accommodating chamber 12.

[0035] The present invention also provides an air-blowing liquid level gauge, comprising any of the air-blowing liquid level gauge nozzles described above. Since the air-blowing liquid level gauge and the liquid level gauge nozzle are based on the same inventive concept, the air-blowing liquid level gauge has all the advantages of the liquid level gauge nozzle, which will not be described in detail here.

[0036] Preferably, the airway 11, the accommodating chamber 12, the blocking member 2 and the restraining member 3 are all coaxially arranged, and the axes of the airway 11, the accommodating chamber 12, the blocking member 2 and the restraining member 3 are all arranged vertically. Such an arrangement enables the buoyancy to act better on the blocking member 2, so that the blocking member 2 can move up and down.

[0037] Furthermore, it also includes a jet flow regulator (not shown in the figure), which can change the gas flow rate so that a balance is reached between the thrust from the gas on the blocking member 2, the buoyancy from the liquid on the blocking member 2 and the gravity of the blocking member 2 itself. The balance of forces can be used to reversely calculate the hydraulic pressure and thus the liquid level.

[0038] It should be noted that the various embodiments in this specification are described in a progressive manner, and any embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0039] It should also be noted that, although the present invention has been disclosed as a preferred embodiment, the above embodiment is not intended to limit the present invention. For any technician familiar with the art, without departing from the scope of the technical solution of the present invention, the technical content disclosed above can be used to make many possible changes and modifications to the technical solution of the present invention, or modified into equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

[0040] It should also be understood that, unless otherwise specified or indicated, the terms "first", "second", "third", etc. in the specification are merely used to distinguish between the various components, elements, steps, etc. in the specification, and are not used to indicate the logical relationship or sequential relationship between the various components, elements, steps, etc.

[0041] It should also be recognized that the terms described herein are used only to describe specific embodiments and are not intended to limit the scope of the invention. It should be noted that the singular forms "a" and "an" used herein and in the appended claims include plural references unless the context clearly indicates otherwise. For example, a reference to "a step" or "a device" means a reference to one or more steps or devices, and may include secondary steps and secondary devices. All conjunctions used should be understood in the broadest sense. And, the word "or" should be understood to have the definition of a logical "or", rather than a logical "exclusive or", unless the context clearly indicates otherwise. In addition, the implementation of embodiments of the present invention may include performing selected tasks manually, automatically, or in combination.

Claims

1. A blowing type liquid level gauge nozzle, characterized in that: It comprises an injection part, a blocking part and a restraining part, wherein the injection part is provided with an airway and a receiving cavity which are interconnected, and the airway and the receiving cavity are used for passing gas; The blocking member includes an air blocking portion and a floating portion which are connected to each other. The buoyancy of the floating portion in the liquid is greater than its own gravity. The floating portion can move under the action of the buoyancy and drive the air blocking portion to move. The air blocking portion can be accommodated in the accommodating cavity and can reciprocate in the accommodating cavity. When the air blocking portion moves to one end of the accommodating cavity close to the air outlet of the airway, the air blocking portion can block the air outlet of the airway. The restraining member is used to limit the movement of the blocking member within a preset space range, so that the air blocking portion can be accommodated in the accommodating cavity and can reciprocate in the accommodating cavity. The restraining member is provided with a plurality of through holes.

2. The air-blowing liquid level gauge nozzle according to claim 1, characterized in that: The airway and the accommodating cavity are coaxially arranged, and the inner diameter of the accommodating cavity is larger than the inner diameter of the airway.

3. The air-blowing liquid level gauge nozzle according to claim 1, characterized in that: The accommodating cavity comprises a first sub-cavity and a second sub-cavity which are coaxially arranged, the first sub-cavity is closer to the air outlet of the airway than the second sub-cavity, and the inner diameter of the second sub-cavity is greater than the inner diameter of the first sub-cavity; The air blocking portion includes a first substructure portion and a second substructure portion, the second substructure portion is connected to the floating portion, and the first substructure portion is used to fit with the first subcavity.

4. The air-blowing liquid level gauge nozzle according to claim 3, characterized in that: The first substructure is in the shape of a cone, and the tip of the cone is arranged toward the air outlet of the airway.

5. The air-blowing liquid level gauge nozzle according to claim 3, characterized in that: The second substructure portion is used to match the second subcavity, and an outer diameter of the second substructure portion is smaller than an inner diameter of the second subcavity.

6. The air-blowing liquid level gauge nozzle according to claim 1, characterized in that: The floating part includes a floating ball, and the inner circumference of the restraining member is adapted to the floating ball, so that the air blocking part can be accommodated in the accommodating cavity and can reciprocate in the accommodating cavity.

7. The air-blowing liquid level gauge nozzle according to claim 1, characterized in that: There are a plurality of through holes, and the plurality of through holes are evenly distributed along the outer circumference of the restraining member.

8. An air-blowing liquid level gauge, characterized in that: The invention comprises an air-blowing liquid level gauge nozzle as claimed in any one of claims 1 to 7.

9. The air-blowing liquid level gauge according to claim 8, characterized in that: The airway, the accommodating chamber, the blocking member and the restraining member are all coaxially arranged, and the axes of the airway, the accommodating chamber, the blocking member and the restraining member are all vertically arranged.

10. The air-blowing liquid level gauge according to claim 8, characterized in that: It also includes a jet flow regulator, which can change the gas flow rate so that a balance is achieved among the thrust from the gas on the blocking member, the buoyancy from the liquid on the blocking member, and the weight of the blocking member itself.

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