CN115111412A

CN115111412A - Replaceable temperature-dependent adjustable current-limiting ring type current limiting device

Info

Publication number: CN115111412A
Application number: CN202210525831.5A
Authority: CN
Inventors: 吴佳祥; 蓝渝康; 刘亚敏; 沈凤村; 张学顺
Original assignee: AVIC Guizhou Aircraft Co Ltd
Current assignee: AVIC Guizhou Aircraft Co Ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-09-27

Abstract

The invention provides a replaceable temperature-dependent regulation current-limiting ring type current-limiting device, which comprises a valve body and a shell detachably connected to the right side of the valve body; inner cavities which penetrate through the left side and the right side of the valve body and the shell are transversely arranged in the valve body and the shell, the inner cavities of the valve body and the shell are mutually penetrated, and a stop piece, a flow limiting ring and a fixing piece are sequentially arranged in the inner cavity of the valve body from left to right; the retainer is a perforated plate which is plugged at the left side in the inner cavity of the valve body; the flow-limiting ring is at least one annular body which can change the aperture of an inner hole of the flow-limiting ring along with the temperature change; the fixing piece is detachably connected to the right side in the inner cavity of the valve body and tightly presses the retainer and the flow limiting ring in the inner cavity of the valve body. The invention has simple and small structure, light weight and low manufacturing cost, the inner restrictor ring can be combined and replaced at will according to the requirement, the use is convenient, and the disassembly and the installation are easy; the flow-limiting ring is made of bimetallic strips, the hole diameter of an inner hole of the flow-limiting ring can be enlarged or reduced according to the temperature change in the pipeline, so that the flow-limiting ring has certain adjusting and compensating functions, and the flow-limiting adjustment is ensured to be more accurate.

Description

Replaceable temperature-dependent adjustable current-limiting ring type current limiting device

Technical Field

The invention relates to a current limiting device, in particular to a replaceable temperature-adjustable current limiting ring type current limiting device.

Background

A flow restriction device (i.e., a flow restriction valve) is a common device used in a pipeline for adjusting the flow resistance of fluid inside the pipeline, and is mainly applied to the following aspects:

1. the pipeline needs to be depressurized and the precision requirement is not particularly high;

2. when a large pressure drop is needed at the upstream and downstream of the pipeline valve, the impact of fluid on the valve is reduced;

3. where the fluid needs a small flow and is continuously circulated;

4. where depressurization is needed to reduce noise or wear;

5. the pipelines are connected in parallel, and different pipelines need different flow rates to be used for matching the pressure of fluid among the pipelines;

6. too fast a fluid flow rate in the tract serves to limit the fluid flow rate.

In the pipelines of the system such as airplane environmental control, hydraulic pressure, fuel oil and the like, the pipelines have multiple branches, different pipelines have different flow rates, and the flow rate of the pipelines needs to be matched.

At present, the current limiting devices are commonly used, each pipeline needs to be designed with different current limiting devices, and the current limiting devices are inconvenient to replace when needing to be adjusted. Meanwhile, in a plurality of liquid pipelines, the change of the liquid temperature has great influence on the viscosity and the density of the liquid, the control precision of the flow limiting valve is insufficient, and the flow limiting following change after the temperature change cannot be met.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a replaceable temperature-dependent adjustable restrictor ring type restrictor device, which can be combined to replace different restrictor rings inside the restrictor ring as required, and the restrictor ring has a certain adjusting function with a temperature change.

The purpose of the invention is realized by the following technical scheme:

a replaceable temperature-dependent regulation current-limiting ring type current-limiting device comprises a valve body and a shell which is detachably connected to the right side of the valve body; inner cavities which penetrate through the left side and the right side of the valve body and the shell are transversely arranged in the valve body and the shell, the inner cavities of the valve body and the shell are mutually penetrated, and a stop piece, a flow limiting ring and a fixing piece are sequentially arranged in the inner cavity of the valve body from left to right; the stop piece is a porous plate which is plugged at the left side in the inner cavity of the valve body; the flow-limiting ring is at least one annular body capable of changing the aperture of an inner hole of the flow-limiting ring along with the temperature change; the fixing piece is detachably connected to the right side in the inner cavity of the valve body and tightly presses the stop piece and the flow limiting ring in the inner cavity of the valve body.

Furthermore, a sealing rubber ring is arranged between the valve body and the shell, and has certain sealing and buffering effects.

Furthermore, the valve body is fixedly connected with the outer part of the shell through a lead seal fuse; the lead seal fuse is two lead strips which are respectively fixed on the valve body and the shell and twisted together.

Furthermore, two gaskets are arranged in the inner cavity of the valve body, one gasket is positioned between the stop piece and the flow limiting ring, and the other gasket is positioned between the flow limiting ring and the fixing piece.

Furthermore, the number of the flow restricting rings is five, and the caliber of the flow restricting rings is gradually reduced from two sides to the middle.

Further, each flow restricting ring comprises an annular outer shell and a bimetallic ring fixed in the outer shell; the bimetal ring is an annular body formed by splicing a plurality of crescent bimetal sheets, and each bimetal sheet consists of an active layer and a passive layer with different thermal expansion coefficients.

Furthermore, the active layer of each bimetallic strip is positioned on the left side, and the passive layer is positioned on the right side.

Furthermore, the thermal expansion coefficient of the active layer of each bimetallic strip is larger than that of the passive layer.

Further, the number of the bimetallic strips in each bimetallic ring is five.

Further, for any adjacent three bimetallic strips in each bimetallic ring, when the concave surface of the middle bimetallic strip faces upwards, the active layer of the middle bimetallic strip is in contact with the passive layer of the left bimetallic strip, and the passive layer of the middle bimetallic strip is in contact with the active layer of the right bimetallic strip.

Bimetallic strip is a composite material made up of two or more metals or other materials having suitable properties. When the thermal expansion coefficient of the active layer is larger than that of the passive layer, and the thermal expansion coefficients of the component layers are different, the deformation of the active layer is larger than that of the passive layer, so that the whole bimetallic strip can be bent towards one side of the passive layer, and the curvature of the composite material is changed to generate deformation.

The invention has simple and small structure, light weight and low cost, is used for limiting the flow on a gas pipeline and a liquid pipeline, can be combined and replaced randomly according to the requirement, is convenient to use and is easy to disassemble and install; the flow-limiting ring is made of bimetallic strips, the hole diameter of an inner hole of the flow-limiting ring can be enlarged or reduced according to the temperature change in the pipeline, so that the flow-limiting ring has certain adjusting and compensating functions, and the flow-limiting adjustment is ensured to be more accurate.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic view of the mounting structure of the present invention;

FIG. 2 is a schematic view of a restrictor ring according to the present invention;

FIG. 3 is a schematic view of the stopper of the present invention;

shown in the figure: 1-valve body, 2-stop piece, 3-flow-limiting ring, 301-shell, 302-passive layer, 303-active layer, 4-shell, 5-fixing piece, 6-gasket, 7-sealing rubber ring and 8-lead sealing fuse.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. The described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be regarded as the scope of the present invention without substantial changes in the technical contents.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-3, the replaceable temperature-dependent adjustable current-limiting ring type current-limiting device of the present invention is used for limiting the current of a gas pipeline or a liquid pipeline, and the current-limiting device (or called a current-limiting valve) comprises a valve body 1 and a shell 4 detachably connected to the right side of the valve body 1; the valve body 1 is used as a base body of the flow limiting device; the existence of the shell 4 can ensure that parts in the inner cavity of the valve body 1 do not fall off, and simultaneously, the valve body 1 is matched and connected with other parts or pipelines; inner cavities which penetrate through the left side and the right side of the valve body 1 and the shell 4 are transversely arranged in the valve body and the shell, the inner cavities of the valve body and the shell are mutually penetrated, and the center lines of the inner cavities of the valve body and the shell are positioned on the same straight line. A sealing rubber ring 7 is arranged between the valve body 1 and the shell 4, and has certain sealing and buffering functions. The valve body 1 is fixedly connected with the outside of the shell 4 through a lead seal fuse 8; the lead sealing fuse 8 is two lead strips which are respectively fixed on the valve body 1 and the shell 4 and twisted together, and the lead sealing fuse 8 has fixing and connecting functions and ensures that the current limiting device cannot be separated and fall off in the using process.

A retainer 2, a flow-limiting ring 3 and a fixing piece 5 are sequentially arranged in the inner cavity of the valve body 1 from left to right.

The stop piece 2 is a perforated plate which is blocked at the (most) left side in the inner cavity of the valve body. The retainer 2 has a buffering function, and holes with different styles and sizes are formed on the retainer according to requirements, so that the retainer has the functions of shunting and shielding foreign matters, and the flow in the inner cavity of the valve body 1 is better regulated. As shown in fig. 3, the stopper 2 used in the present embodiment is a plate uniformly provided with a plurality of circular holes or slot holes.

The flow-limiting rings 3 (3 a, 3b, 3c, 3d and 3 e) are five annular bodies which are placed in the inner cavity of the valve body 1 and can change the aperture of the inner hole of the valve body along with the temperature change, the flow-limiting rings 3 are made of bimetallic strips, and the size of the inner hole in the middle of the flow-limiting rings can be adjusted according to the temperature change, so that the flow-limiting rings 3 have certain compensation and adjustment capacity; the number of the flow-limiting rings 3 can be different according to actual requirements, and the flow-limiting rings 3 with different flow-limiting apertures and flow-limiting styles are combined by using different numbers of flow-limiting rings 3 to adjust the pressure and flow of the pipeline. The calibers of the five restrictor rings 3 are gradually reduced from two sides to the middle, the calibers of the restrictor rings 3 (3 a, 3 e) positioned at the two sides are the largest, and the calibers of the restrictor rings 3 (3 c) positioned at the middle are the smallest.

As shown in fig. 2, each restrictor ring 3 includes an annular housing 301 and a bimetal ring fixed within the housing 301; the bimetallic ring is a vortex-like annular body formed by splicing five crescent bimetallic strips; each bimetallic strip is composed of an active layer 303 and a passive layer 302 with different thermal expansion coefficients, and a flow limiting hole (inner hole) in the middle of the bimetallic ring can be enlarged or reduced according to temperature change, so that the flow limiting adjustment is more accurate; the bimetallic ring is formed by five crescent bimetallic strips which are overlapped end to form a circular ring with a hole in the middle, and the outer side of each bimetallic ring is clamped (fixed) in the annular shell 301. The active layer 303 of each bimetal is located on the left side (on the side from which water flows, i.e. on the side close to the stopper 2), and the passive layer is located on the right side (on the side from which water flows, i.e. on the side close to the fixing member 5). The coefficient of thermal expansion of the active layer 303 of each bimetal is greater than that of the passive layer 302. The bimetallic strip is a crescent-shaped sheet body formed by combining two or more metals or other materials with different thermal expansion coefficients, such as: a bimetallic strip composed of aluminum and copper, wherein the aluminum is an active layer 303, and the copper is a passive layer 302; for another example, the bimetal may be a bimetal composed of aluminum and stainless steel, wherein the aluminum is the active layer 303, the stainless steel is the passive layer 302, the bimetal is composed of copper and stainless steel, wherein the copper is the active layer 302, the stainless steel 303 is the passive layer, the bimetal may be a combination of metal and metal, metal and alloy materials, and the like, but the thermal expansion coefficient of the active layer 303 is larger than that of the passive layer 302.

For any adjacent three bimetallic strips in each bimetallic ring, when the concave surface of the middle bimetallic strip faces upwards, the active layer 303 of the middle bimetallic strip is in contact with the passive layer 302 of the left bimetallic strip, and the passive layer 302 of the middle bimetallic strip is in contact with the active layer 303 of the right bimetallic strip. Or it can be described as arbitrarily rotating the bimetal ring, when the concave surface of a certain bimetal is upward, the active layer 303 of the bimetal contacts with the passive layer 302 on the left side of the bimetal, and the passive layer 302 of the bimetal contacts with the active layer 303 of the bimetal on the right side of the bimetal.

The fixing piece 5 is detachably connected to the right side inside the inner cavity of the valve body 1 and tightly presses the stop piece 2 and the flow limiting ring 3 in the inner cavity of the valve body 1. The fixing piece 5 is of a cylindrical structure, and the outer wall of the fixing piece is in threaded connection with the right side inside the inner cavity of the valve body 1.

Two gaskets 6 are arranged in the inner cavity of the valve body 1 for adjusting the installation clearance, wherein one gasket 6 is positioned between the retainer 2 and the restrictor ring 3 (pressed between the retainer 2 and the restrictor ring 3), and the other gasket 6 is positioned between the restrictor ring 3 and the fixing piece 5 (pressed between the restrictor ring 3 and the fixing piece 5).

The working principle of the invention is as follows:

the stop piece 2, the left gasket 6, the combined flow-limiting ring 3 and the right gasket 6 are sequentially placed in the inner cavity of the valve body 1 from left to right, then the stop piece 2 and the combined flow-limiting ring are pressed on the stop piece 2 by the fixing piece 5, then the sealing rubber ring 7 is installed, the shell 1 and the valve body 4 are installed, and the lead sealing fuse 8 is arranged, so that the installation is completed. When air flow or liquid flows into the inner cavity of the valve body 1 from the left side, the air flow or the liquid firstly enters the inner cavity of the valve body 1 after being regulated by the stop piece 2, and then flows out of the valve body 1 after being regulated by the flow limiting ring 3 to obtain fluid with required flow speed and flow. When the temperature changes, the active layer 303 on the restrictor ring 3 begins to expand or contract with cold, which drives the passive layer 302 to change, and simultaneously the inner diameter of the restrictor ring 3 changes, and the flow rate and the flow velocity of the fluid also change along with the temperature.

It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The scope of the present invention is not limited to the technical solutions disclosed in the embodiments, and any modifications, equivalent substitutions, improvements, etc. made to the above embodiments according to the technical spirit of the present invention fall within the scope of the present invention.

Claims

1. A replaceable temperature-dependent regulation current-limiting ring type current-limiting device comprises a valve body and a shell which is detachably connected to the right side of the valve body; the valve body and the shell are both transversely provided with inner cavities which run through the left side and the right side of the valve body and the inner cavities of the valve body and the shell run through each other, and the valve is characterized in that a stop piece, a flow-limiting ring and a fixing piece are sequentially arranged in the inner cavity of the valve body from left to right; the stop piece is a porous plate which is plugged at the left side in the inner cavity of the valve body; the flow-limiting ring is at least one annular body capable of changing the aperture of an inner hole of the flow-limiting ring along with the temperature change; the fixing piece is detachably connected to the right side in the inner cavity of the valve body and tightly presses the stop piece and the flow limiting ring in the inner cavity of the valve body.

2. The replaceable temperature regulated flow restrictor ring device of claim 1, wherein a sealing rubber ring is disposed between the valve body and the housing.

3. The replaceable temperature regulated current limit ring type current limit device of claim 1 wherein the valve body is fixedly connected to the exterior of the housing by a lead seal fuse; the lead seal fuse is two lead strips which are respectively fixed on the valve body and the shell and twisted together.

4. The replaceable thermostat-dependent restrictor ring-type restriction device of claim 1, further comprising two washers disposed within the valve body cavity, one washer being disposed between the stopper and the restrictor ring, and the other washer being disposed between the restrictor ring and the retainer.

5. The replaceable temperature-dependent adjustable restrictor ring device of claim 1, wherein the number of restrictor rings is five, and the bore diameter of the restrictor rings gradually decreases from the two sides to the middle.

6. The replaceable temperature regulated restrictor ring device of any of claims 1-5, wherein each restrictor ring comprises an annular housing and a bimetal ring secured within the housing; the bimetal ring is an annular body formed by splicing a plurality of crescent bimetal sheets, and each bimetal sheet consists of an active layer and a passive layer with different thermal expansion coefficients.

7. The replaceable temperature regulated current limiting ring flow restrictor device of claim 6, wherein the active layer of each bimetal is located on the left side and the passive layer is located on the right side.

8. The replaceable temperature dependent current limiting ring flow restrictor device of claim 7, wherein the active layer of each bimetallic strip has a coefficient of thermal expansion greater than that of the passive layer.

9. The replaceable temperature dependent current limiting ring restrictor device of claim 7, wherein the number of bimetallic strips in each bimetallic ring is five.

10. The replaceable temperature dependent current limiting ring type current limiting device of claim 7 wherein for any adjacent three bimetallic strips in each bimetallic ring, when the concave surface of the middle bimetallic strip faces upward, the active layer of the middle bimetallic strip contacts the passive layer of the left bimetallic strip, and the passive layer of the middle bimetallic strip contacts the active layer of the right bimetallic strip.