Replaceable temperature-regulated flow-limiting ring type flow-limiting device

Abstract

The application provides a replaceable temperature-adjustable flow-limiting ring type flow-limiting device, which comprises a valve body and a shell detachably connected to the right side of the valve body; an inner cavity is horizontally arranged in the valve body and the shell and penetrates through the left and right sides of each of the valve body and the shell, and the inner cavities of the valve body and the shell are interconnected; a stopper, a flow-limiting ring and a fixing member are sequentially arranged in the inner cavity of the valve body from left to right; the stopper is a porous plate blocked in the inner cavity of the valve body; the flow-limiting ring is at least one annular body capable of changing the inner hole diameter according to the temperature change; and the fixing member is detachably connected to the inner right side of the inner cavity of the valve body and presses the stopper and the flow-limiting ring in the inner cavity of the valve body. The application has the advantages of simple structure, small size, light weight and low cost, the internal flow-limiting ring can be arbitrarily combined and replaced according to the requirement, the application is convenient to use, and the application is easy to disassemble and install; the flow-limiting ring is made of a bimetallic strip, the inner hole diameter of the flow-limiting ring can be enlarged or reduced according to the temperature change in the pipeline, the flow-limiting ring has certain adjusting and compensating functions, and the flow-limiting adjusting is more accurate.

Description

Technical Field

[0001] This invention relates to a current limiting device, specifically a replaceable temperature-adjustable current limiting ring type current limiting device. Background Technology

[0002] Flow limiting devices (i.e., flow limiting valves) are commonly used devices in pipelines to regulate the resistance to fluid flow inside the pipeline, and are mainly used in the following aspects:

[0003] 1. The pipeline requires pressure reduction but the precision requirements are not particularly high;

[0004] 2. When a large pressure drop is required upstream and downstream of a pipeline valve, measures should be taken to reduce the impact of fluid on the valve;

[0005] 3. Where fluids require a small flow rate and continuous flow;

[0006] 4. In locations where voltage reduction is needed to decrease noise or wear;

[0007] 5. Parallel pipelines are used to match the fluid pressure between different pipelines, as different pipelines require different flow rates.

[0008] 6. The fluid velocity inside the channel is too high, which is used to limit the fluid velocity.

[0009] In aircraft environmental control, hydraulic and fuel systems, there are many branches and different flow rates in different pipelines. It is necessary to match the flow rates of the pipelines. A common method is to add flow-limiting joints to the pipelines to match the pressure values ​​inside the pipelines, so as to distribute the different flow rates in different pipelines.

[0010] Currently, flow limiting devices are widely used, but each pipeline requires a different flow limiting device, making replacement inconvenient when adjustments are needed. Furthermore, in many liquid pipelines, changes in liquid temperature significantly affect the liquid's viscosity and density, and flow limiting valves lack sufficient control precision to adapt to changes in temperature. Summary of the Invention

[0011] To address the aforementioned problems, the present invention aims to provide a replaceable temperature-adjustable flow limiting ring type flow limiting device. This flow limiting device allows for the replacement of different internal flow limiting rings as needed, and the flow limiting rings have a certain adjustment function as the temperature changes.

[0012] The objective of this invention is achieved through the following technical solution:

[0013] A replaceable temperature-adjustable flow limiting ring type flow limiting device includes a valve body and a housing detachably connected to the right side of the valve body; both the valve body and the housing have transverse cavities penetrating their respective left and right sides, and the cavities of the two are interconnected; within the valve body cavity, from left to right, a stop member, a flow limiting ring, and a fixing member are arranged sequentially; the stop member is a perforated plate sealing the left side of the valve body cavity; the flow limiting ring is at least one annular body whose inner diameter can change with temperature; the fixing member is detachably connected to the right side of the valve body cavity and presses the stop member and the flow limiting ring into the valve body cavity.

[0014] Furthermore, a sealing ring is provided between the valve body and the housing, which has a certain sealing and buffering function.

[0015] Furthermore, the valve body and the housing are fixedly connected by a lead seal; the lead seal consists of two lead strips that are respectively fixed to the valve body and the housing and twisted together.

[0016] Furthermore, two washers are provided inside the valve body cavity: one washer is located between the stop and the flow limiting ring, and the other washer is located between the flow limiting ring and the fixing member.

[0017] Furthermore, the number of flow-limiting rings is five, and the diameter gradually decreases from both sides to the middle.

[0018] Furthermore, each flow-limiting ring includes an annular outer shell and a bimetallic ring fixed inside the outer shell; the bimetallic ring is an annular body assembled from multiple crescent-shaped bimetallic sheets, each of which consists of an active layer and a passive layer with different coefficients of thermal expansion.

[0019] Furthermore, the active layer of each bimetallic sheet is located on the left side, and the passive layer is located on the right side.

[0020] Furthermore, the coefficient of thermal expansion of the active layer of each bimetallic sheet is greater than that of the passive layer.

[0021] Furthermore, each bimetallic ring contains five bimetallic plates.

[0022] Furthermore, for any three adjacent bimetallic strips in each bimetallic ring, when the concave surface of the middle bimetallic strip is facing upwards, the active layer of the middle bimetallic strip is in contact with the passive layer of the bimetallic strip to its left, and the passive layer of the middle bimetallic strip is in contact with the active layer of the bimetallic strip to its right.

[0023] A bimetallic sheet is a composite material composed of two or more metals or other materials with suitable properties. When the coefficient of thermal expansion of the active layer is greater than that of the passive layer, the deformation of the active layer is greater than that of the passive layer due to the different coefficients of thermal expansion of the constituent layers when the temperature changes. As a result, the bimetallic sheet as a whole will bend towards the passive layer side, and the curvature of this composite material changes, thus producing deformation.

[0024] This invention features a simple, compact, lightweight, and low-cost structure, making it suitable for flow control in gas and liquid pipelines. The internal flow-limiting rings can be freely combined and replaced as needed, making it convenient to use, disassemble, and install. The flow-limiting rings are made of bimetallic strips, and their inner diameter can increase or decrease according to temperature changes within the pipeline, providing adjustment and compensation functions to ensure more precise flow control. Attached Figure Description

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the installation structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the current-limiting ring of the present invention;

[0028] Figure 3 This is a schematic diagram of the external shape of the stop component of the present invention;

[0029] The figure shows: 1-valve body, 2-stop, 3-flow limiting ring, 301-shell, 302-passive layer, 303-active layer, 4-shell, 5-fixing component, 6-washer, 7-sealing ring, 8-lead seal safety. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] like Figure 1-3 The present invention discloses a replaceable temperature-adjustable flow-limiting ring type flow-limiting device for flow limitation in gas or liquid pipelines. The flow-limiting device (or flow-limiting valve) includes a valve body 1 and a housing 4 detachably connected to the right side of the valve body 1. The valve body 1 serves as the base of the flow-limiting device. The housing 4 ensures that the parts inside the valve body 1 do not fall off, and also serves to connect the valve body 1 with other parts or pipelines. Both the valve body 1 and the housing 4 have transverse cavities that penetrate their respective left and right sides, and the cavities are interconnected, with their center lines aligned on the same straight line. A sealing ring 7 is provided between the valve body 1 and the housing 4, providing a certain degree of sealing and buffering. The valve body 1 and the housing 4 are fixedly connected externally by a lead seal safety 8. The lead seal safety 8 consists of two lead strips respectively fixed to the valve body 1 and the housing 4 and twisted together, providing fixing and connection to ensure that the flow-limiting device will not separate or fall off during use.

[0034] The valve body 1 is provided with a stop 2, a flow limiting ring 3, and a fixing member 5 from left to right inside the inner cavity.

[0035] The stop 2 is a perforated plate that seals the leftmost part of the valve body's internal cavity. The stop 2 not only provides a buffering effect, but also has holes of different styles and sizes as needed, thus serving to divert flow and block foreign objects, allowing for better flow regulation within the valve body 1's internal cavity. Figure 3 As shown, the stopper 2 used in this embodiment is a plate with multiple round holes or slots evenly distributed.

[0036] The flow-limiting rings 3 (3a, 3b, 3c, 3d, 3e) are five annular bodies placed inside the inner cavity of the valve body 1, whose inner orifice diameter changes with temperature. The flow-limiting rings 3 are made of bimetallic strips and can adjust the size of their central inner orifice according to temperature changes, giving them a certain compensation and adjustment capability. The number of flow-limiting rings 3 can be customized according to actual needs, using different combinations to form flow-limiting rings 3 with different orifice diameters and flow-limiting patterns to regulate pipeline pressure and flow rate. The diameter of the five flow-limiting rings 3 gradually decreases from both sides towards the middle, with the outermost flow-limiting rings 3 (3a, 3e) having the largest diameter and the middle flow-limiting ring 3 (3c) having the smallest diameter.

[0037] like Figure 2 As shown, each flow-limiting ring 3 includes an annular outer shell 301 and a bimetallic ring fixed inside the outer shell 301. The bimetallic ring is a vortex-like annular body formed by assembling five crescent-shaped bimetallic plates. Each bimetallic plate consists of an active layer 303 and a passive layer 302 with different coefficients of thermal expansion. The flow-limiting hole (inner hole) in the middle of the bimetallic ring will increase or decrease according to temperature changes, making the flow-limiting adjustment more precise. The bimetallic ring is formed by five crescent-shaped bimetallic plates, which overlap end to end to form a ring with a hole in the middle. The outer side of each bimetallic ring is snapped (fixed) inside the annular outer shell 301. The active layer 303 of each bimetallic plate is located on the left side (on the side where the water flows in, i.e., the side closer to the stop 2), and the passive layer is located on the right side (on the side where the water flows out, i.e., the side closer to the fixing member 5). The coefficient of thermal expansion of the active layer 303 of each bimetallic plate is greater than that of the passive layer 302. A bimetallic strip is a crescent-shaped sheet composed of two or more metals or other materials with different coefficients of thermal expansion. For example, a bimetallic strip composed of aluminum and copper, where aluminum is the active layer 303 and copper is the passive layer 302; another example is a bimetallic strip composed of aluminum and stainless steel, where aluminum is the active layer 303 and stainless steel is the passive layer 302; and yet another example is a bimetallic strip composed of copper and stainless steel, where copper is the active layer 302 and stainless steel 303 is the passive layer. The bimetallic strip can be a combination of metals and metals, metals and alloys, etc., but the coefficient of thermal expansion of the active layer 303 must be greater than that of the passive layer 302.

[0038] For any three adjacent bimetallic strips in each bimetallic ring, when the concave surface of the middle bimetallic strip faces upward, the active layer 303 of the middle bimetallic strip contacts the passive layer 302 of the bimetallic strip to its left, and the passive layer 302 of the middle bimetallic strip contacts the active layer 303 of the bimetallic strip to its right. Alternatively, it can be described as rotating the bimetallic ring so that when the concave surface of a certain bimetallic strip faces upward, the active layer 303 of that bimetallic strip contacts the passive layer of the bimetallic strip to its left, and simultaneously the passive layer 302 of that bimetallic strip contacts the active layer 303 of the bimetallic strip to its right.

[0039] The fixing member 5 is detachably connected to the right side of the inner cavity of the valve body 1 and presses the stop member 2 and the flow limiting ring 3 into the inner cavity of the valve body 1. The fixing member 5 is a cylindrical structure, and its outer wall is threadedly connected to the right side of the inner cavity of the valve body 1.

[0040] Two washers 6 are also provided in the inner cavity of the valve body 1 to adjust the installation gap. One washer 6 is located between the stop 2 and the flow limiting ring 3 (pressed between the stop 2 and the flow limiting ring 3), and the other washer 6 is located between the flow limiting ring 3 and the fixing member 5 (pressed between the flow limiting ring 3 and the fixing member 5).

[0041] The working principle of this invention is as follows:

[0042] Inside the valve body 1, from left to right, place the stop 2, left-side washer 6, pre-assembled flow-limiting ring 3, and right-side washer 6. Then, use the fixing piece 5 to press them onto the stop 2. Next, install the sealing ring 7, install the housing 1 and valve body 4, and apply the lead seal safety 8. The installation is now complete. When airflow or liquid flows into the valve body 1 from the left, it first passes through the stop 2 for regulation before entering the valve body 1. Then, it passes through the flow-limiting ring 3 for flow restriction and regulation before flowing out of the valve body 1, obtaining the required flow rate and velocity. When the temperature changes, the active layer 303 on the flow-limiting ring 3 begins to expand or contract, causing the passive layer 302 to change. At the same time, the inner diameter of the flow-limiting ring 3 changes, and the flow rate and velocity of the fluid also change with the temperature.

[0043] It should be noted that the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] The scope of protection of this invention is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this invention shall fall within the scope of protection of this invention.

Claims

1. A replaceable temperature-adjustable flow limiting ring type flow limiting device, comprising a valve body and a housing detachably connected to the right side of the valve body; both the valve body and the housing have transversely arranged inner cavities penetrating their respective left and right sides, and the inner cavities of the two are interconnected, characterized in that... The valve body cavity is provided with a stop, a flow limiting ring, and a fixing member from left to right. The stop is a perforated plate that seals the left side of the valve body cavity. The flow limiting ring is at least one annular body that can change its inner diameter with temperature. The fixing member is detachably connected to the right side of the valve body cavity and presses the stop and the flow limiting ring into the valve body cavity. Each current-limiting ring includes an annular outer shell and a bimetallic ring fixed inside the outer shell; the bimetallic ring is an annular body assembled from multiple crescent-shaped bimetallic sheets, each bimetallic sheet consisting of an active layer and a passive layer with different coefficients of thermal expansion, the active layer of each bimetallic sheet being located near the stop member, and the passive layer being located near the fixing member, the coefficient of thermal expansion of the active layer of each bimetallic sheet being greater than that of the passive layer.

2. The replaceable temperature-adjustable current-limiting ring type current-limiting device according to claim 1, characterized in that... A sealing ring is provided between the valve body and the housing.

3. The replaceable temperature-adjustable current-limiting ring type current-limiting device according to claim 1, characterized in that... The valve body and the housing are fixedly connected by a lead seal; the lead seal consists of two lead strips that are respectively fixed to the valve body and the housing and twisted together.

4. The replaceable temperature-adjustable current-limiting ring type current-limiting device according to claim 1, characterized in that... Two washers are also provided inside the valve body cavity. One washer is located between the stop and the flow limiting ring, and the other washer is located between the flow limiting ring and the fixing part.

5. The replaceable temperature-adjustable current-limiting ring type current-limiting device according to claim 1, characterized in that... The number of flow-limiting rings is five, and the diameter gradually decreases from both sides to the middle.

6. The replaceable temperature-adjustable current-limiting ring type current-limiting device according to claim 1, characterized in that... Each bimetallic ring contains five bimetallic plates.

7. The replaceable temperature-adjustable current-limiting ring type current-limiting device according to claim 1, characterized in that... For any three adjacent bimetallic strips in each bimetallic ring, when the concave surface of the middle bimetallic strip is facing upwards, the active layer of the middle bimetallic strip is in contact with the passive layer of the bimetallic strip to its left, and the passive layer of the middle bimetallic strip is in contact with the active layer of the bimetallic strip to its right.

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