CN116951208A

CN116951208A - Current limiting device

Info

Publication number: CN116951208A
Application number: CN202310886313.0A
Authority: CN
Inventors: 唐松
Original assignee: Dalai Nur Coal Industry Co Ltd
Current assignee: Dalai Nur Coal Industry Co Ltd
Priority date: 2023-07-18
Filing date: 2023-07-18
Publication date: 2023-10-27

Abstract

The invention provides a flow limiting device, which comprises a flow limiting part and a first extension pipe, wherein the flow limiting part comprises an inner wall and an outer wall, the inner wall is arranged in a cavity surrounded by the outer wall, a flow limiting channel is defined between the inner wall and the outer wall, the flow limiting part is provided with a first state and a second state, at least one of at least part of the inner wall and at least part of the outer wall deforms to enable the cross section area of the flow limiting channel to be reduced, at least one of at least part of the inner wall and at least part of the outer wall returns to an original state in the second state, the first end of the first extension pipe is connected with the flow limiting part, the cavity of the first extension pipe is communicated with the cavity, the second end of the first extension pipe extends towards a direction away from the flow limiting part, and the second end of the first extension pipe is used for being connected with a liquid discharge pipeline. The current limiting device has the advantages of simple structure and convenient use.

Description

Current limiting device

Technical Field

The invention relates to the technical field of energy transmission mechanical devices, in particular to a current limiting device.

Background

In the field of energy transmission in the related art, ordinary energy transmission is free of current limitation or large in current-limiting pressure drop, valve port loss is generally reduced through circulation, or damage rate of external equipment is reduced through automatic depressurization of an annular device, wherein the external equipment is generally electric equipment, system failure rate is high, and use cost is high.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the invention provides a current limiting device which has the advantages of simple structure and convenient use.

The current limiting device of the embodiment of the invention comprises:

a flow restrictor comprising an inner wall and an outer wall, the inner wall being disposed within a cavity defined by the outer wall, a flow restricting passage being defined between the inner wall and the outer wall, the flow restrictor having a first state and a second state,

in the first state, at least one of at least a portion of the inner wall and at least a portion of the outer wall is deformed to reduce a cross-sectional area of the restricted passage,

in the second state, at least one of at least a portion of the inner wall and at least a portion of the outer wall reverts to an original state;

the first end of the first extension pipe is connected with the flow limiting part, the pipe cavity of the first extension pipe is communicated with the cavity, the second end of the first extension pipe extends towards the direction away from the flow limiting part, and the second end of the first extension pipe is used for being connected with a liquid discharge pipeline.

The flow limiting device provided by the embodiment of the invention can change the size of the flow limiting channel by utilizing the change of the flow limiting part in the first state and the second state, thereby realizing the flow limiting function, namely, when the cross section area of the flow limiting channel is reduced, the flow rate of liquid discharged by the liquid discharge pipeline can be reduced, and when the cross section area of the flow limiting channel returns to the original state, the flow rate of the liquid discharged by the liquid discharge pipeline is restored to the original flow rate.

In some embodiments, the flow restrictor device of the present embodiments further comprises a second extension tube disposed opposite the first extension tube in the direction of extension of the flow restrictor device, the first end of the second extension tube being connected to the flow restrictor and the lumen of the second extension tube being in communication with the cavity, the second end of the second extension tube being for connection to a shunt.

In some embodiments, the flow restrictor is annular, the center of the inner wall is located on the center line of the first extension pipe, the inner wall comprises a flow dividing lobe corresponding to the first extension pipe and the second extension pipe one by one, the flow dividing lobe is arranged on the inner wall, and the flow dividing lobe extends in a direction away from the inner wall.

In some embodiments, the flow diversion lobe has a tip with an apex located on the centerline of the first extension tube, the tip having an angle of 80 degrees or greater and 140 degrees or less in a plane orthogonal to the axis of the flow restrictor.

In some embodiments, the inner wall further comprises a stabilizing groove disposed circumferentially along the inner wall.

In some embodiments, the center of the inner wall is not coincident with the center of the outer wall, and the inner wall is located on a side of the cavity adjacent the second extension tube.

In some embodiments, the outer wall and the inner wall are spherical, the inner wall is connected to the outer wall by a connector, and the outer wall coincides with the center of sphere of the inner wall.

In some embodiments, the outer wall includes a first outer wall section, a second outer wall section, and a third outer wall section connected in sequence along the direction of extension of the flow restricting device, the first outer wall section and the third outer wall section having a radius of curvature equal to and greater than the radius of curvature of the second outer wall section;

the inner wall comprises a first inner wall section, a second inner wall section and a third inner wall section which are sequentially connected along the extending direction of the flow limiting device, wherein the curvature radius of the first inner wall section is equal to that of the third inner wall section and is larger than that of the second inner wall section.

In some embodiments, the outer wall is made of a heat shrink material and the inner wall is made of a heat swell material.

In some embodiments, the outer wall includes a heat shrink coating that is painted on an inner wall surface of the outer wall, the inner wall includes a heat expansion coating that is painted on an outer wall surface of the inner wall.

Drawings

Fig. 1 is a schematic structural view of a current limiting device in a second state according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a current limiting device according to another embodiment of the present invention in a second state.

Fig. 3 is a schematic structural view of a current limiting device according to still another embodiment of the present invention in a second state.

Fig. 4 is a schematic view of a flow restrictor device according to another embodiment of the present invention in a second state.

Fig. 5 is a schematic view of a structure in which a plurality of flow restricting devices according to an embodiment of the present invention are used in combination.

Reference numerals:

a drain pipe 100;

a flow restrictor 1;

an inner wall 11; a shunt lobe 110; a first inner wall section 111; a second inner wall section 112; a third inner wall section 113; steady flow channel 113.

An outer wall 12; a first outer wall section 121; a second outer wall section 122; a third outer wall section 123;

a flow restricting passage 13;

a first extension pipe 21;

a second extension pipe 22;

and a connecting piece 3.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

As shown in fig. 1 to 5, the flow restriction device of the embodiment of the present invention includes a flow restrictor 1 and a first extension pipe 21.

The flow restrictor 1 comprises an inner wall 11 and an outer wall 12, the inner wall 11 being disposed within a cavity defined by the outer wall 12, the inner wall 11 and the outer wall 12 defining a flow restricting channel 13 therebetween, the flow restrictor 1 having a first state in which at least one of at least part of the inner wall 11 and at least part of the outer wall 12 is deformed so as to reduce the cross-sectional area of the flow restricting channel 13, and a second state in which at least one of at least part of the inner wall 11 and at least part of the outer wall 12 is restored to the original state.

It will be appreciated that, as shown in fig. 1, the gap between the inner wall surface of the outer wall 12 and the outer wall surface of the inner wall 11 is the restricted flow channel 13, so that the fluid can flow through the restricted flow channel 13. The flow restrictor 1 is switchable between a first state and a second state such that the cross-sectional area of the flow restricting channel 13 is reduced or restored, thereby effecting a flow restriction of the fluid flow rate.

It should be noted that, in actual production, the temperature of the fluid flowing into the flow restrictor 1 will change, and in case of a large amount of heat of the fluid, a lower flow restriction is required to ensure pressure fluctuation during the restriction. Thus, the inner wall 11 and the outer wall 12 may be of a heated, i.e. deformable, material to ensure that the flow restrictor 1 is capable of switching between the first state and the second state.

The way in which the restricted flow channel 13 contracts and recovers includes: the outer wall 12 is made of deformable material, when fluid is introduced, the outer wall 12 is heated to shrink in the direction of the inner wall 11, namely the flow-limiting channel 13 is narrowed, so as to realize the flow-limiting function; alternatively, the inner wall 11 is made of a deformable material, so that when fluid is introduced, the inner wall 11 is heated to expand toward the inner wall 11, i.e., the flow-limiting channel 13 is narrowed, so as to realize the flow-limiting function; alternatively, preferably, both the inner wall 11 and the outer wall 12 are made of deformable materials, and when fluid is introduced, the outer wall 12 receives heat to contract in the direction of the inner wall 11 while the inner wall 11 receives heat to expand in the direction of the inner wall 11, i.e., the flow restriction passage 13 narrows, to achieve a flow restriction function.

Alternatively, the outer wall 12 is made of a heat shrink material and the inner wall 11 is made of a heat swell material.

Alternatively, the outer wall 12 includes a heat shrink coating that is painted on the inner wall surface of the outer wall 12, and the inner wall 11 includes a heat expansion coating that is painted on the outer wall surface of the inner wall 11.

That is, when the fluid temperature in the flow restrictor 1 is high, the outer wall 12 is subjected to contraction deformation, and the inner wall 11 is subjected to expansion deformation, so that the cross-sectional area of the flow restricting passage 13 is reduced, thereby realizing the flow restricting function.

Wherein the heat shrinkage material comprises polyethylene, polyvinyl chloride and the like, and the heat expansion material comprises polyvinylidene chloride, vinyl acetate copolymer and the like.

The first end of the first extension pipe 21 is connected to the flow restrictor 1, and the lumen of the first extension pipe 21 communicates with the cavity, the second end of the first extension pipe 21 extends in a direction away from the flow restrictor 1, and the second end of the first extension pipe 21 is adapted to be connected to the liquid discharge pipe 100.

Specifically, as shown in fig. 1, the first extension pipe 21 is located at the left side of the flow restrictor 1, the right end of the first extension pipe 21 (i.e., the first end of the first extension pipe 21) is connected to the flow restrictor 1, and the outer circumferential wall of the left end of the first extension pipe 21 is provided with external threads matching the drain pipe 100 so that the first extension pipe 21 and the drain pipe 100 can be connected by the threads.

Therefore, the flow-limiting device according to the embodiment of the present invention can change the size of the flow-limiting channel 13 by using the change of the flow-limiting portion 1 in the first state and the second state, so as to realize the flow-limiting function, that is, when the cross-sectional area of the flow-limiting channel 13 becomes smaller, the flow rate of the liquid discharged from the liquid discharge pipe 100 can be reduced, and when the cross-sectional area of the flow-limiting channel 13 returns to the original state, the flow rate of the liquid discharged from the liquid discharge pipe 100 returns to the original flow rate.

In some embodiments, the flow restriction device of the present invention further comprises a second extension tube 22, the second extension tube 22 being disposed opposite the first extension tube 21 in the direction of extension of the flow restriction device, a first end of the second extension tube 22 being connected to the flow restriction 1, and the lumen of the second extension tube 22 being in communication with the cavity, a second end of the second extension tube 22 being adapted for connection to a shunt.

Specifically, as shown in fig. 1, the second extension pipe 22 is located at the right side of the flow restrictor 1, the left end of the second extension pipe 22 (i.e., the first end of the second extension pipe 22) is connected to the flow restrictor 1, and the outer circumferential wall of the right end of the second extension pipe 22 is provided with external threads so that the second extension pipe 22 is screwed with other pipes.

Optionally, the pipe diameter of the first extension pipe 21 is greater than or equal to the pipe diameter of the second extension pipe 22, that is, the pipe diameter of the first extension pipe 21 and the pipe diameter of the second extension pipe 22 may be different sizes, so that when the flow restrictor 1 is in the first state, fluid in the restrictor can flow from the restrictor into the second extension pipe 22 stably, and the stability of the whole flow restrictor in the embodiment of the present invention is improved.

In some embodiments, the flow restrictor 1 is annular, the center of the inner wall 11 is located on the center line of the first extension tube 21, the inner wall 11 includes the flow dividing lobes 110 in one-to-one correspondence with the first extension tube 21 and the second extension tube 22, the flow dividing lobes 110 are provided on the inner wall 11 and the flow dividing lobes 110 extend away from the inner wall 11.

Specifically, as shown in fig. 1, the inner wall 11 is disposed within the cavity of the outer wall 12 and divides the cavity into two flow restricting passages 13. The first extension pipe 21 and the second extension pipe 22 extend in the left-right direction, so that the center line of the first extension pipe 21 extends in the left-right direction, the number of the split lobes 110 is two, and the two split lobes 110 are respectively located at the left and right sides of the inner wall 11, so that fluid from the drain pipe to the drain pipe can flow from the two flow restricting passages 13 to the second extension pipe 22, respectively.

It will be appreciated that when the fluid temperature is high, the inner wall 11 and the outer wall 12 are deformed, and the cross-sectional area of the flow-restricting passage 13 is rapidly reduced due to the deformation of the inner wall 11 and the outer wall 12, so that the flow-restricting effect can be rapidly achieved, the fluid with heat is prevented from flowing too fast, and the energy loss is reduced.

In some embodiments, the flow dividing lobe 110 has a tip with an apex lying on the centerline of the first extension tube 21, the tip angle being 80 degrees or greater and 140 degrees or less in a plane orthogonal to the axis of the flow restrictor 1.

Specifically, as shown in fig. 1, the tip of the diverting lobe 110 is located on the center line of the first extension pipe 21, and the diverting lobe 110 located at the left side of the inner wall 11 can uniformly divide the fluid discharged from the liquid discharge pipe 100 into two paths and flow into the two flow restricting passages 13, respectively.

Preferably, the side wall surfaces of the splitter lobes 110 are tangential to the outer wall surfaces of the inner wall 11. According to the pipe diameter of the first extension pipe 21 and the size of the limiting portion, the angle of the tip is optionally set to be 80 degrees or more and 140 degrees or less, so as to ensure that the side wall surface of the split lobe 110 is tangent to the outer wall surface of the inner wall 11, and further ensure that the fluid can stably flow in the limiting portion.

In some embodiments, the inner wall 11 further includes a stabilizing channel 114, the stabilizing channel 114 being disposed circumferentially of the inner wall 11. It can be understood that the fluid flows to the two flow-limiting channels 13 through the split lobe 110 and is divided into two branches, and the flow-rate of the fluid is uneven due to the large-sized flow channel (i.e. the first extension tube 21) flowing to the small-sized flow channel (i.e. the flow-limiting channel 13), so that the influence of the narrowing channel on the flow rate of the fluid can be reduced and the effect of stabilizing the flow rate can be achieved by providing the flow-stabilizing channel 114 on the outer wall surface of the inner wall 11.

In other embodiments, the center of the inner wall 11 does not coincide with the center of the outer wall 12, and the inner wall 11 is located on the side of the cavity adjacent to the second extension tube 22.

It will be appreciated that as shown in fig. 2, the inner wall 11 is arranged eccentrically with respect to the outer wall 12 and that the distance between the inner wall 11 and the second extension pipe 22 is smaller than the distance between the inner wall 11 and the first extension pipe 21, i.e. the inner wall 11 is closer to the second extension pipe 22.

That is, when the fluid flows from the first extension pipe 21 to the flow restrictor 1, the inner wall 11 is eccentrically disposed, so that the flow path change width of the fluid is reduced, and the influence of the abrupt change in the flow path size on the fluid flow velocity is avoided.

In still other embodiments, the outer wall 12 and the inner wall 11 are both spherical, the inner wall 11 is connected to the outer wall 12 by a connector, and the outer wall 12 coincides with the center of sphere of the inner wall 11.

It will be appreciated that as shown in fig. 3, one end of the connector 3 is connected to the inner wall 11 and a second end of the connector 3 is connected to the outer wall 12. Wherein the connecting member 3 is made of a deformable material, such as deformable rubber or the like.

That is, when the inner wall 11 and the outer wall 12 are deformed by the influence of the heat of the fluid, the connection member 3 connected between the inner wall 11 and the outer wall 12 is deformed by the pressing action of the inner wall 11 and the outer wall 12, thereby avoiding the restriction of the restriction passage 13.

In other embodiments, the outer wall 12 includes a first outer wall section 121, a second outer wall section 122, and a third outer wall section 123 connected in sequence along the direction of extension of the flow restricting device, the first outer wall section 121 and the third outer wall section 123 having a radius of curvature equal to and greater than the radius of curvature of the second outer wall section 122; the inner wall 11 includes a first inner wall section 111, a second inner wall section 112 and a third inner wall section 113 which are sequentially connected in the extending direction of the flow restriction device, and the radius of curvature of the first inner wall section 111 and the third inner wall section 113 is equal to and larger than that of the second inner wall section 112.

It will be appreciated that as shown in fig. 4, the first outer wall section 121 is connected to the right end of the first extension pipe 21, and the third outer wall section 123 is connected to the left end of the second extension pipe 22. Because of the different radii of curvature of the first 121 and third 123 outer wall sections and the second 122 outer wall sections of the outer wall 12 and the different radii of curvature of the first 111 and third 113 inner wall sections and the second 112 inner wall sections of the inner wall 11, the spacing portion is generally divided into two "half-moon like" flow restricting channels 13, wherein the left and right ends of the inner wall 11 form flow restricting lobes.

It should be noted that, in the above embodiments, each embodiment may be used alone or in combination according to actual production conditions, that is, as shown in fig. 5, although other embodiments not shown may be used.

In the description of the present invention, 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 invention 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 invention.

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 invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, 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; may be mechanically connected, may be electrically connected or may be in communication with each other; 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 invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, 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.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean 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 invention. 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 the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.

Claims

1. A current limiting device, comprising:

2. The flow restrictor of claim 1, further comprising a second extension tube disposed opposite the first extension tube in the direction of extension of the flow restrictor, a first end of the second extension tube being connected to the flow restrictor and a lumen of the second extension tube being in communication with the cavity, a second end of the second extension tube being for connection to a shunt.

3. The flow restricting device of claim 2, wherein the flow restricting portion is annular, a center of the inner wall is located on a center line of the first extension pipe, the inner wall includes a flow dividing lobe corresponding to the first extension pipe and the second extension pipe one by one, the flow dividing lobe is provided on the inner wall and the flow dividing lobe extends in a direction away from the inner wall.

4. A flow restrictor according to claim 3 wherein the flow-dividing lobe has a tip with its apex lying on the centre line of the first extension tube, the tip having an angle of 80 degrees or more and 140 degrees or less in a plane orthogonal to the axis of the flow restrictor.

5. The flow restrictor of claim 4, wherein the inner wall further comprises a flow stabilizing groove disposed circumferentially of the inner wall.

6. A flow restrictor according to claim 3 wherein the centre of the inner wall is not coincident with the centre of the outer wall and the inner wall is located on the side of the cavity adjacent the second extension tube.

7. The flow restricting device of claim 2, wherein the outer wall and the inner wall are spherical, the inner wall is connected to the outer wall by a connector, and the center of sphere of the outer wall and the inner wall coincide.

8. A flow restrictor according to claim 3, wherein the outer wall comprises a first outer wall section, a second outer wall section and a third outer wall section connected in sequence along the direction of extension of the flow restrictor, the first outer wall section and the third outer wall section having a radius of curvature equal to and greater than the radius of curvature of the second outer wall section;

9. The flow restrictor of any of claims 1-8, wherein the outer wall is made of a heat shrink material and the inner wall is made of a heat swell material.

10. The flow restrictor of any of claims 1-8, wherein the outer wall comprises a heat shrink coating that is painted on an inner wall surface of the outer wall, the inner wall comprising a heat expansion coating that is painted on an outer wall surface of the inner wall.