CN214946657U

CN214946657U - Self-feedback adjusting valve device and fire extinguishing equipment

Info

Publication number: CN214946657U
Application number: CN202120368770.7U
Authority: CN
Inventors: 宦臣茂
Original assignee: Qingdao Nengfeng Electric Co ltd
Current assignee: Qingdao Nengfeng Electric Co ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-11-30
Anticipated expiration: 2031-02-08

Abstract

The utility model discloses a valve gear and corresponding fire extinguishing apparatus of self-feedback regulation. The valve assembly includes a valve assembly and a smelt storage device, the valve assembly including an inflow port, an outflow port, and a flow leader communicating the inflow port and the outflow port. The fusible material storage device is used for storing fusible materials, is arranged in the valve component and partially coincides with the flow guide channel, when the temperature outside the valve component is increased, at least part of the fusible materials in the fusible material storage device are melted and flow out of the valve device from the outflow port so as to enable the flow guide channel to be communicated, and when the temperature outside the valve component is reduced, the fusible materials in the fusible material storage device are solidified in the flow guide channel so as to enable the flow guide channel to be blocked. The utility model has the advantages of low cost, non-maintaining, automated inspection temperature rise and automatic fire prevention put out a fire, can be used to the fire prevention of lithium cell, put out a fire.

Description

Self-feedback adjusting valve device and fire extinguishing equipment

Technical Field

The application relates to the field of electrochemical energy storage fire fighting, in particular to a self-feedback adjusting valve device and fire extinguishing equipment. The utility model discloses can be applied to and can last application occasions such as upper limit critical temperature control requirement to the lithium cell fire control or have.

Background

With the gradual progress and popularization of lithium battery energy storage products, more and more energy storage products are oriented to the market and are applied to the majority. However, the fire risk brought by the lithium battery cannot be ignored, necessary fire prevention and extinguishing measures are taken, the use risk is reduced, the safety is improved, and the ignition of the lithium battery is caused by the fact that the heat in the battery cannot be released, and the internal and external combustibles are ignited. The reasons for this are many, such as: battery short circuits, overcharging, manufacturing defects, improper design, etc. Due to the high energy density characteristic of lithium batteries, the resulting fire cannot be treated by conventional means. At present, data of lithium batteries show that a large amount of energy stored in the lithium batteries needs a long time to be released in a thermal form in the process of accidents, so that the fire presents the characteristics of long duration time of high temperature and difficult short-time extinguishment of the fire. Therefore, special control means are required for the suppression and fire extinguishing systems of lithium ion battery systems.

Researches show that before an accident occurs, the battery pack can be subjected to a high-temperature and high-heat release process, and at the moment, as long as the lossless cooling device is triggered through temperature feedback, the heat released by the battery is neutralized and absorbed in time, so that the temperature of the battery is controlled below a critical point, and the occurrence of serious accidents such as fire or explosion can be delayed or directly avoided.

The current lithium cell energy storage fire control medium switch valve that puts out a fire to the cost classification mainly has two kinds: one is a low cost manual or automatic valve that can only be opened and closed; the second is the expensive electromagnetically controlled valve with sensor feedback and must be matched to a complex set of control systems for use.

For the first valve, because the opening degree cannot be controlled, the problem of too large or too small opening degree often occurs because the displacement design is difficult to estimate in the using process. When the opening is too large, due to the characteristic of long heat release time of the lithium battery, a large amount of cooling and fire extinguishing media needs to be prepared, and the cost is directly increased excessively by combining the high price of the special lithium battery fire extinguishing media; when the opening is too small, the heat of the battery cannot be absorbed in time, and the temperature rise cannot be inhibited to cause safety accidents;

for the second valve, firstly, various sensors must be combined, and a whole set of electric control and power supply system needs to be equipped, so that the use cost is high; secondly, due to the complexity of the system design and layout, such as sensor reliability, wiring design, independent power supply, etc., during long-term use, faults may occur, requiring regular maintenance and repair. By combining the conditions, the applicable environment and the client object of the valve are greatly limited.

Disclosure of Invention

The present invention is directed to a self-feedback regulating valve device and a method for manufacturing the same, which are intended to solve at least some of the above technical problems.

In order to achieve the above object, according to one aspect of the present invention, there is provided a self-feedback regulating valve device, including a valve assembly, the valve assembly being a housing including an inflow port, an outflow port, and a flow guide communicating the inflow port and the outflow port, the self-feedback regulating valve device comprising: the valve device also comprises an fusible material storage device, the fusible material storage device is used for storing fusible materials, is arranged in the valve component and is partially overlapped with the diversion channel; when the temperature outside the valve component is increased, at least part of fusible material in the fusible material storage device is melted and flows out of the outflow port to the outside of the valve component, so that the diversion channel is communicated; when the temperature outside the valve component is reduced, the fusible material in the fusible material storage device is solidified in the diversion channel so as to block the diversion channel.

According to a preferred embodiment of the present invention, the fusible material storage device comprises a storage chamber and an infiltration body,

the storage cavity is used for storing fusible matters;

the infiltration suction body part is positioned in the flow guide channel, is communicated with the inside of the storage cavity and is used for infiltrating and sucking the fusible substances in a melting state into the flow guide channel.

According to the preferred embodiment of the present invention, the imbibition body is a porous net structure.

According to a preferred embodiment of the present invention, the inflow port, the outflow port and the flow guide are located at a side portion of the valve device, and the fusible material storage device is located at a middle portion of the valve device.

According to the preferred embodiment of the present invention, the flow guide is an annular channel located at the side of the valve device, and the imbibition body is an annular structure partially located in the annular channel.

According to a preferred embodiment of the present invention, the valve assembly further comprises: a valve upper cover, a valve side wall and a base bottom plate, wherein,

the inflow port is positioned at the upper end of the upper cover of the valve;

the guide channel is formed between the side wall of the valve and the outer side wall of the fusible material storage device;

the outflow port is located on the base floor.

According to a preferred embodiment of the invention, the base bottom plate comprises a plurality of outflow openings, which are arranged outside the base bottom plate.

According to a preferred embodiment of the invention, the fusible material is paraffin.

The utility model also provides an automatic fire extinguishing apparatus, include the valving.

According to the utility model discloses a preferred embodiment still includes fire extinguishing medium, works as when valve device's water conservancy diversion way link up, fire extinguishing medium flows through the water conservancy diversion way flows out in order to put out a fire.

Based on the above technical solution, the valve device and the manufacturing method thereof of the present invention at least have one of the following advantages over the prior art:

1. the utility model discloses compare with low-cost manual switch valve, the improper rising that can perception target temperature opens the valve in good time to it makes the valve aperture follow target temperature is automatic, under the sufficient condition of design maximum discharge capacity, can guarantee that target temperature remains below critical temperature throughout, effectively avoids the inside temperature of battery out of control and the emergence accident.

2. Because the utility model is discharged according to the requirement, the consumption of the cooling fire extinguishing medium is greatly saved, and the use cost is also saved.

3. The utility model discloses an easy low-cost fusible thing that obtains is as the temperature sensing medium of putting out a fire to utilize phase transition and molecule effort to adjust the drive as the aperture, need not external sensor, automatically controlled and power supply system support, need not to consider system layout and walk the line, need not to overhaul and maintain simultaneously, greatly reduced design and use cost.

Drawings

FIG. 1 is a schematic diagram of a self-feedback regulated valve arrangement according to the present invention;

FIG. 2 is a schematic diagram of a half-section of a self-feedback regulated valve arrangement of the present invention;

fig. 3A is a schematic view of an initial closed state of a valve according to an embodiment of the present invention;

FIG. 3B is a schematic view of the wax body in a molten state according to an embodiment of the present invention;

fig. 3C is a schematic view of the open state of the valve according to an embodiment of the present invention.

Fig. 3D is a schematic diagram of the increase of the valve opening according to an embodiment of the present invention.

Fig. 3E is a schematic view of the valve opening reduction according to an embodiment of the present invention.

1 valve upper cover 101 inflow 102 joint screw thread

2 side wall of valve

3 store 301 wax storage cavities of chamber

4 imbibition body 401 mesh body 402 melting wax layer 403 capillary wax layer

5 base bottom plate

6 outflow opening

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the exemplary embodiments of the invention have been illustrated in the accompanying drawings, it is to be understood that the invention may be embodied in various forms and that the embodiments are not intended to limit the scope of the invention. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

In describing particular embodiments, specific details of structures, properties, effects, or other features are set forth in order to provide a thorough understanding of the embodiments by one skilled in the art. However, it is not excluded that a person skilled in the art may implement the invention in a specific case in a solution that does not contain the above-described structures, properties, effects or other features.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, for example, "a and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The utility model discloses generally put forward a valve gear from feedback control, the utility model discloses combine the current situation of current lithium cell fire control switch valve product, need not external sensor, also need not under the circumstances that automatically controlled and power supply system supported, utilize self temperature-sensing fire extinguishing medium perception external temperature and feedback control valve opening, and then reach the purpose of the fire extinguishing medium output quantity of as required automatically regulated to make external temperature control critical temperature below all the time, and can not cause the waste of unnecessary fire extinguishing medium.

The utility model discloses in, valve assembly includes the valve member, and the valve member is a casing, including inflow entrance, egress opening and intercommunication the water conservancy diversion way of inflow entrance and egress opening, the fire-extinguishing medium that this device can be used can flow in through the water conservancy diversion way through the inflow entrance and flow out from the egress opening. The extinguishing medium is limited to gas only. The valve device also comprises a fusible material storage device, the fusible material storage device is used for storing fusible materials and is arranged in the valve component and partially coincided with the flow guide channel, the fusible materials in the fusible material storage device are in a solidification state under a normal temperature state, and the flow guide channel in the valve component is blocked by the fusible materials in the solidification state, so that the fire extinguishing medium cannot flow out from the outflow port.

When the temperature outside the valve component is increased, at least part of fusible material in the fusible material storage device is melted and flows out of the outflow port to the outside of the valve component so as to penetrate the diversion channel, and then the fire extinguishing medium can flow in through the inflow port and flow out of the outflow port through the diversion channel;

when the temperature outside the valve assembly is lowered, the fusible material in the fusible material storage device is solidified in the flow guide so that the flow guide is blocked, and the fire extinguishing medium cannot flow in through the inflow port and flow out from the outflow port through the flow guide.

Fig. 1 is a schematic structural diagram of the self-feedback regulating valve device of the present invention, and fig. 2 is a schematic structural diagram of a half-section of the self-feedback regulating valve device of the present invention. As shown in fig. 1 and 2, the valve assembly of the present invention is a housing, including a valve upper cover 1, a valve side wall 2 and a base bottom plate 5, the inflow port 101 is located at the upper end of the valve upper cover 1, the outflow port 6 is located on the base bottom plate 5, the outer side of the upper end of the valve upper cover 1 is provided with a joint thread 102 for connecting with a front end fire extinguishing medium conduit (not shown in the figure), the outer side of the lower end of the valve upper cover 1, the inner side of the upper end of the valve side wall 2 and the outer side of the circumference of the base bottom plate 5 are both thread structures, which can make the valve upper cover 1 and the valve side wall 2 fixed by thread connection, the valve side wall 2 fixed by thread connection with the base bottom plate 5, wherein the base bottom plate 5 includes a plurality of outflow ports 6, and the outflow ports 6 are arranged at the outer side of the base bottom plate 5.

Further, the valve component comprises an fusible material storage device inside, the fusible material storage device is located in the middle of the valve device, the inflow port 101, the outflow port 6 and the flow guide are located on the side of the valve device, the fusible material storage device comprises a storage cavity 3 and an infiltration body 4, the storage cavity 3 is used for storing the fusible material, the infiltration body 4 is partially located in the flow guide and used for infiltrating the fusible material in a molten state into the flow guide and communicated with the inside of the storage cavity 3, the flow guide is an annular channel located on the side of the valve device, the infiltration body 4 is an annular structure partially located in the annular channel, and the infiltration body 4 is a porous mesh structure.

It is worth mentioning that the base bottom plate 5 is provided with a plurality of outflow ports 6, the base bottom plate 5 is used for supporting the fusible material storage device inside the valve device and simultaneously transferring the external temperature, so that the storage cavity 3 and the infiltration body 4 in the fusible material storage device can sense the heat below the external base bottom plate 5 and provide the outflow ports for the outflow of the fire extinguishing medium and the liquid fusible material; the porous net body structure can be understood as an annular net body which is made of porous materials, is wrapped by the valve side wall 2 and is used for adsorbing and infiltrating liquid fusible matters, when the porous net body structure is used for the first time, the porous net body structure is encapsulated by the fusible matters, when the valve side wall 2 conducts heat to the annular net body, a designed temperature gradient is formed, a capillary effect is generated, a fusible matter melting layer in the annular net body is kept and supplemented, and the melted fusible matters are in a balanced state in the process of changing the pressure of a fire extinguishing medium and a phase change boundary.

The following is a description of the working principle of the self-feedback regulating valve device according to a specific embodiment, in which the fusible material is in a solidified state at normal temperature and is melted into a liquid state when the temperature is higher than the normal temperature and reaches the melting point of the fusible material, the utility model discloses in the fusible material can be paraffin, the utility model discloses still include the fire extinguishing medium, work as when valve device's flow guide is link up, the fire extinguishing medium flows through the flow guide flows out in order to put out a fire.

Fig. 3A is a schematic view of an initial closed state of a valve device according to an embodiment of the present invention, in which the valve device includes a valve component, the fusible material is paraffin, and the storage cavity is a wax storage cavity 301. The imbibition body is a net body 401 which is a porous structure with capillary effect.

In this embodiment, the valve means is generally in the shape of an ink bottle having a circular horizontal cross-section. The housing of the valve device comprises a valve upper cover 1, a valve side wall 2 and a base bottom plate 5. The center of the upper part of the valve upper cover 1 forms a convex circular truncated cone, and the horizontal cross-sectional area of the circular truncated cone is smaller than that of the side wall 2. The inflow port 101 is provided at the upper end of the valve upper cover 1.

The wax storage chamber 301 is formed in the interior of the valve assembly near the center. The upper part of the wax storage cavity extends to the valve upper cover 1, and the area of the lower part close to the base bottom plate 5 is provided with a channel communicated with the diversion channel. The wax storage cavity 301 is located at the inner center of the valve device and partially extends to the valve upper cover 1, so that the wax storage cavity 301 is not easy to contact with an external heat source, and the outer side of the side wall 2 is used as a main heated area, so that the valve device is prevented from being influenced by abnormal paraffin melting to normally work.

The outflow opening 6 is located on the base bottom plate 5, which outflow opening 6 is arranged outside the base bottom plate 5. Since the outer side of the side wall of the valve device is first heated, once the paraffin situated on the outer side melts, it can immediately flow out of the outflow opening 6. The net body 401 is positioned in the diversion channel and is wrapped by the valve side wall 2, and the bottom of the net body is communicated with the bottom of the wax storage cavity 301.

The first valve state is as shown in fig. 3A, when the valve device is in a to-be-used state and/or the external temperature is lower than a design value for opening the valve device, the wax storage cavity 301 and the mesh body 401 are respectively encapsulated by paraffin, and a part of the mesh body 401 is located in the flow guide channel, and is used for infiltrating and sucking the paraffin in a molten state into the flow guide channel and is communicated with the inside of the wax storage cavity 301.

In this embodiment, the guide channel is an annular channel located at the side of the valve device, and the guide channel may be understood as a channel communicating with the inflow port 101 and the outflow port 6, and communicating with each other when the fusible material paraffin is melted. The net body 401 is an annular structure partially positioned in the annular channel, the wax storage cavity 301 is a storage cavity encapsulated by paraffin, and the net body 401 is a porous net body structure imbibition body. As shown in fig. 3A, the valve is in a closed state because the mesh body 401 is encapsulated by paraffin wax, and the diversion channel is not unblocked.

Fig. 3B is a schematic diagram of the melting state of the wax body according to an embodiment of the present invention, and the second state of the valve is as shown in fig. 3B, when the external temperature is increased, the external heat is transmitted to the inside of the net body encapsulated by the paraffin wax through the valve side wall 2 and the base bottom plate 5 in a heat conduction manner. According to the Fourier heat conduction law, the net body 401 presents a temperature distribution which is decreased from outside to inside in a certain design gradient, when the temperature is increased to the paraffin melting temperature, paraffin in the net body starts to melt to form a molten wax layer 402, at the moment, the molten wax layer 402 is thin, the flow guide channel cannot be unblocked under the action of a capillary effect, and the valve device is in a critical opening state.

Fig. 3C is a schematic view of the open state of the valve according to an embodiment of the present invention, and the third state of the valve is as shown in fig. 3C, when the external temperature is higher than the designed value temperature, which may be the melting temperature of the melt paraffin and/or the melting temperature of other melts, the external heat is transferred to the inside of the paraffin-encapsulated net body 401 through the valve side wall 2 and the base bottom plate 5 in a heat conduction manner, so that the melt paraffin in the net body 401 is continuously melted at a position close to the valve side wall 2 and the base bottom plate 5, at this time, the inflow port 101 continuously flows in the fire extinguishing medium, and the partially melted liquid paraffin is flowed out from the outflow port 6 of the base bottom plate 5 under the pressure of the fire extinguishing medium, forming a flow guide channel and a capillary wax layer 403, the fire extinguishing medium can flow in from the inflow port 101, flows out from the outflow port 6 via the flow guide channel formed by melting part of the net body 401, the valve is now in an open state.

Fig. 3D is the valve opening increases the schematic diagram, and the valve fourth state is as shown in fig. 3D, and when ambient temperature lastingly risees, the dictyosome 401 by the paraffin embedment lastingly received more heat conduction that come from valve lateral wall 2 and base bottom plate 5, fusible object paraffin in the dictyosome 401 further to the valve device is inside to be melted, capillary wax layer 403 to valve device central point puts the removal, spills the annular channel that more dictyosome structure imbibition bodies 4 formed, makes the diversion channel circulation region enlarges gradually, the fire extinguishing medium obtains further release, and the valve is in the opening and increases the state this moment.

Fig. 3E is a schematic view illustrating the reduction of the valve opening according to an embodiment of the present invention, and the fifth state of the valve is as shown in fig. 3E, when the external temperature of the valve device is reduced, the internal temperature of the valve device is changed at this time, the paraffin of the fusible material in the net body 401 starts to solidify, under the infiltration effect generated by the surface tension of the wax storage cavity 301 in the storage cavity 3 supplements the capillary wax layer 403 through the bottom melting layer, and moves toward the valve side wall 2, the paraffin in the net body 401 is supplemented, a new net body 401 is formed, the diversion channel is reduced until the net body 401 is completely filled with the paraffin of the fusible material and solidifies, the fire extinguishing medium cannot flow into the inflow port 101 and flow out from the outflow port 6 through the diversion channel, and the valve is in the opening reduction state from this time.

It is worth mentioning that the fire extinguishing medium flowing in from the inflow port can be any gas capable of cooling and/or extinguishing fire, such as carbon dioxide, nitrogen, inert gas, heptafluoropropane, etc., and can be specifically replaced according to different use environments.

The utility model discloses still provide an automatic fire extinguishing apparatus, automatic fire extinguishing apparatus includes as before the valve device. The outside temperature is transmitted to the net body filled with the paraffin in a heat conduction mode through the side wall of the valve. According to a Fourier heat conduction equation, the net body presents temperature distribution which is decreased from outside to inside in a certain design gradient, and when the outside temperature is lower than the designed opening temperature, the valve body flow guide channel is in a closed state due to the sealing of the solid paraffin; when the external temperature rises to a designed opening temperature value, the sealing paraffin on the outermost layer of the net body starts to melt, part of the molten liquid paraffin is discharged under the pressure action of the fire extinguishing medium gas, and the opening of the valve diversion channel starts to be communicated after being increased; with the further rise of the temperature, the paraffin is further melted towards the interior of the valve device, the opening degree of the valve guide flow channel is continuously increased, and when the heat released by the battery is balanced with the discharge capacity of the fire extinguishing medium, the temperature cannot be increased. When battery heat release reduced, ambient temperature dropped, and at this moment, the inside temperature distribution of valving changed, and the liquid paraffin layer in the net body begins to solidify, and under the infiltration effect that surface tension produced, the paraffin of storage intracavity supplyed the liquid paraffin layer through bottom melting layer for the valve water conservancy diversion says the aperture and begins to reduce, realizes discharging as required. So repeatedly, in the within range between opening temperature and the design critical temperature, realize the automatic following of aperture to the target temperature to can keep the discharge of fire extinguishing medium to the thermal balance of battery release. When the battery is removed or the heat release is exhausted, the temperature is reduced to the point that the imbibition body is completely filled with paraffin and solidified, and the valve device is restored to the initial closed state.

It should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes described in the context of a single embodiment or with reference to a single figure, for the purpose of streamlining the disclosure and aiding those skilled in the art in understanding various aspects of the invention. However, the present invention should not be interpreted as the features included in the exemplary embodiments are all the essential technical features of the patent claims.

It should be understood that the modules, units, components, etc. included in the apparatus of one embodiment of the present invention may be adaptively changed to be provided in an apparatus different from the embodiment. The different modules, units or components comprised by the apparatus of an embodiment may be combined into one module, unit or component or they may be divided into a plurality of sub-modules, sub-units or sub-components.

Claims

1. A self-feedback regulating valve assembly comprising a valve assembly, said valve assembly comprising a housing including an inlet port, an outlet port, and a flow conduit communicating said inlet port and said outlet port, wherein:

the valve device also comprises an fusible material storage device, the fusible material storage device is used for storing fusible materials, is arranged in the valve component and is partially overlapped with the diversion channel;

when the temperature outside the valve component is increased, at least part of fusible material in the fusible material storage device is melted and flows out of the outflow port to the outside of the valve component, so that the diversion channel is communicated;

when the temperature outside the valve component is reduced, the fusible material in the fusible material storage device is solidified in the diversion channel so as to block the diversion channel.

2. The valve device of claim 1, wherein the fusible material storage means comprises a storage chamber and a seepage means,

the storage cavity is used for storing fusible matters;

3. The valve device of claim 2, wherein the imbibition body is a porous mesh structure.

4. The valve device according to claim 2, wherein said inflow port, outflow port and said guide are located at side portions of said valve device, and said fusible material storage means is located at a central portion of said valve device.

5. The valve assembly of claim 4 wherein said flow leader is an annular channel located on the side of said valve assembly and said aspirator is an annular structure located partially within said annular channel.

6. The valve assembly of claim 4, wherein the valve assembly further comprises: a valve upper cover, a valve side wall and a base bottom plate, wherein,

the inflow port is positioned at the upper end of the upper cover of the valve;

the outflow port is located on the base floor.

7. The valve assembly of claim 6, wherein said base plate includes a plurality of outflow ports arranged on an outer side of said base plate.

8. A valve device according to any one of claims 1 to 7, wherein the fusible material is paraffin.

9. An automatic fire extinguishing apparatus, characterized by comprising a valve device according to any one of claims 1 to 7.

10. The automatic fire extinguishing apparatus according to claim 9, further comprising a fire extinguishing medium flowing through the flow guide of the valve device when the flow guide is perforated to extinguish a fire.