Container valve, fire extinguishing device and battery cabinet

Abstract

The present invention relates to a container valve, a fire extinguishing device and a battery cabinet. The container valve includes a valve body and a piston. The piston includes a body, a gas replenishing core and an elastic member. In the initial state of the fire extinguishing device, the gas replenishing core is in equilibrium and in a closed position under the action of the pressure in the inhibitor bottle, the fire detection tube and the elastic member. When there is a slight leakage in the pressure of the fire detection tube, and the pressure in the inlet cavity is higher than the pressure in the outlet cavity by a first pressure value but less than a second pressure value, the whole piston remains stationary, while the gas replenishing core moves towards the outlet cavity to the gas replenishing position under the action of the pressure difference. At this time, the outlet cavity is communicated with the inlet cavity, so as to replenish the pressure in the inhibitor bottle into the fire detection tube, so that the pressure in the outlet cavity and the inlet cavity returns to balance again. After the pressure difference between the outlet cavity and the inlet cavity disappears, the gas replenishing core returns to the closed position again under the action of the elastic member, so as to maintain the stability of the whole piston. Thus, the service life of the above fire extinguishing device is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of fire-fighting equipment, and particularly to a container valve, a fire extinguishing device and a battery cabinet. Background Art

[0002] In order to ensure the safety of new energy vehicles during use, their battery cabinets need to be equipped with corresponding fire extinguishing devices. Since manual fire extinguishing has poor timeliness and cannot meet the requirements of effective fire extinguishing, most existing battery cabinets adopt automatic fire extinguishing methods. In order to simplify the structure and reduce costs, an automatic fire extinguishing device based on a fire detection tube is being widely used.

[0003] The above-mentioned automatic fire extinguishing device includes a bottle body filled with a fire extinguishing agent and a fire detection tube communicated with the bottle body. The inside of the fire detection tube is filled with gas to form a relatively high positive pressure. The fire detection tube will rupture under a high-temperature environment, so that the fire extinguishing agent is ejected to achieve fire extinguishing. However, during storage and standby, the pressure inside the fire detection tube may slowly leak, which may ultimately lead to the failure of the automatic fire extinguishing device. Summary of the Invention

[0004] Based on this, it is necessary to provide a container valve, a fire extinguishing device and a battery cabinet that can improve the service life of the fire extinguishing device for the above problems.

[0005] A container valve includes:

[0006] A valve body having an inlet, an outlet and a piston chamber located between the inlet and the outlet, and a liquid outlet is further provided on the side wall of the piston chamber; and

[0007] A piston slidably disposed in the piston chamber to divide the piston chamber into an inlet chamber communicated with the inlet and an outlet chamber communicated with the outlet. The piston can switch between a first position where the liquid outlet is disconnected from the inlet and a second position where the liquid outlet is communicated with the inlet; the piston includes a main body, a gas replenishing core and an elastic member. The main body is provided with a guiding channel penetrating the main body. The gas replenishing core is slidably disposed in the guiding channel. Under the action of the elastic member, the gas replenishing core is located at a closed position where the outlet chamber is disconnected from the inlet chamber. When the pressure in the inlet chamber is higher than the outlet chamber by a first pressure value, the gas replenishing core can be driven to move from the closed position to a gas replenishing position where the outlet chamber is communicated with the inlet chamber;

[0008] Wherein, when the pressure in the inlet chamber is higher than the outlet chamber by a second pressure value, the piston can be driven to move from the first position to the second position, and the second pressure value is greater than the first pressure value.

[0009] In one embodiment, the main body is formed with an air supplement channel. One end of the air supplement channel communicates with the outlet cavity, and the other end communicates with the guiding channel. The air supplement core position at the closed position covers the opening of the air supplement channel, and the air supplement core at the air supplement position exposes the opening of the air supplement channel.

[0010] In one embodiment, the piston further includes a hollow stud fixed in the guiding channel, and the elastic member is a compression spring sleeved on the hollow stud and abutted against the air supplement core.

[0011] A fire extinguishing device includes:

[0012] An inhibitor bottle;

[0013] A fire detection tube that can rupture when reaching a preset temperature; and

[0014] The container valve as described in any one of the above preferred embodiments, where the inlet communicates with the bottle mouth of the inhibitor bottle, and the outlet communicates with the fire detection tube;

[0015] Wherein, in the initial state of the fire extinguishing device, the piston is located at the first position, and the air supplement core is located at the closed position.

[0016] In one embodiment, a temperature sensing component is further included. The temperature sensing component communicates with the inhibitor bottle through the container valve, and the temperature sensing component can rupture when reaching a preset temperature.

[0017] In one embodiment, a signal feedback component and a communication board are further included. The signal feedback component communicates with the inhibitor bottle through the container valve and is electrically connected to the communication board.

[0018] In one embodiment, a ball valve is further included and is arranged between the outlet and the fire detection tube.

[0019] In one embodiment, the fire extinguishing device further includes a spraying component. The spraying component includes a pipeline communicating with the liquid outlet and a nozzle connected to the end of the pipeline.

[0020] In one embodiment, the fire extinguishing device further includes a box body. The box body is fixed in the receiving cavity, and the inhibitor bottle is fixed in the box body.

[0021] A battery cabinet includes:

[0022] A cabinet body; and

[0023] The fire extinguishing device as described in any one of the above preferred embodiments, and the fire extinguishing device is installed in the cabinet body.

[0024] In the above-mentioned battery cabinet, when a fire breaks out inside the cabinet and causes the temperature to rise above the preset temperature, the fire detection tube ruptures, resulting in a sudden drop in the pressure in the outlet cavity, and the piston moves to the second position. At this time, the liquid outlet is communicated with the inlet, and the fire extinguishing agent in the inhibitor bottle can enter the piston cavity from the inlet and be discharged to the cabinet body through the liquid outlet to achieve automatic fire extinguishing. It can be seen that the above-mentioned battery cabinet does not adopt a detector and a controller when realizing automatic fire extinguishing, so there is no need to set up a signal transmission line.

[0025] Moreover, since the inhibitor bottle of the fire extinguishing device is arranged inside the cabinet body, the fire extinguishing agent discharged from the inhibitor bottle can directly enter the cabinet body, so there is no need to set up complex connecting pipelines to introduce the fire extinguishing agent into the cabinet body when a fire breaks out. Therefore, while simplifying the structure, the above-mentioned battery cabinet can significantly reduce costs.

[0026] In addition, in the initial state, the air replenishing core is in balance and in the closed position under the action of the pressure in the inhibitor bottle, the fire detection tube, and the elastic member. When there is a slight leakage of the pressure in the fire detection tube, and the pressure in the inlet cavity is higher than the first pressure value but lower than the second pressure value of the outlet cavity, the piston as a whole remains stationary, while the air replenishing core moves towards the outlet cavity to the air replenishing position under the action of the pressure difference. At this time, the outlet cavity is communicated with the inlet cavity, so as to supplement the pressure in the inhibitor bottle into the fire detection tube, so that the pressure in the outlet cavity and the inlet cavity returns to balance again. After the pressure difference between the outlet cavity and the inlet cavity disappears, the air replenishing core returns to the closed position again under the action of the elastic member, so as to maintain the stability of the piston as a whole. In this way, the service life of the above-mentioned fire extinguishing device is prolonged. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0028] Figure 1 It is the front view of the fire extinguishing device in the preferred embodiment of the present invention;

[0029] Figure 2 It is Figure 1 The sectional view of the shown fire extinguishing device along A-A;

[0030] Figure 3 It is Figure 1 The structural schematic diagram of the container valve in the shown fire extinguishing device;

[0031] Figure 4 It is Figure 3 The sectional view of the shown container valve;

[0032] Figure 5 is Figure 4 a partially enlarged schematic view of the container valve shown in the first working state;

[0033] Figure 6 is Figure 4 a partially enlarged schematic view of the container valve shown in the second working state;

[0034] Figure 7 is Figure 4 a partially enlarged schematic view of the container valve shown in the third working state. Specific Embodiments

[0035] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In the present invention, unless otherwise clearly defined and limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0041] The present invention provides a container valve, a fire extinguishing device and a battery cabinet. Please refer to Figure 1 , the battery cabinet includes a cabinet body (not shown in the figure) and a fire extinguishing device 100.

[0042] The cabinet body has a receiving cavity capable of receiving and fixing the battery. The cabinet body can be formed by splicing metal plates and can be either enclosed or open. Moreover, the fire extinguishing device 100 is also received in the receiving cavity. The fire extinguishing device 100 can discharge fire extinguishing agent into the cabinet body when a fire breaks out, thereby achieving fire extinguishing.

[0043] Please refer to Figure 2 together, the fire extinguishing device 100 in the preferred embodiment of the present invention includes an inhibitor bottle 110, a container valve 120 and a fire detection tube 130.

[0044] The inhibitor bottle 110 is used to store the fire extinguishing agent, and it is filled with a relatively large air pressure inside. The inhibitor bottle 110 in the fire extinguishing device 100 can be single or multiple. In this embodiment, there are three inhibitor bottles 110. The inhibitor bottle 110 is fixed in the receiving cavity of the cabinet body. Specifically, in this embodiment, the fire extinguishing device 100 further includes a box body 140 which is fixed in the receiving cavity, and the inhibitor bottle 110 is fixed inside the box body 140. The box body 140 can be formed by splicing multiple plates, and the inhibitor bottle 110 can be fastened to the bottom surface of the box body 140 by a hoop.

[0045] Please refer to Figure 3 and Figure 4 , the container valve 120 includes a valve body 121 and a piston 122. Among them, the valve body 121 has an inlet 101, an outlet 102 and a piston chamber 103. The inlet 101 of the valve body 121 is communicated with the bottle mouth of the inhibitor bottle 110. For the case of including multiple inhibitor bottles 110, a plurality of inlets 101 are correspondingly arranged on the valve body 121 to achieve the confluence of multiple inhibitor bottles 110. In addition, the inlet 101 and the outlet 102 are respectively communicated with both ends of the piston chamber 103, and the piston 122 is slidably arranged in the piston chamber 103. Specifically, the piston 122 divides the piston chamber 103 into two chambers, namely an inlet chamber (not marked in the figure) communicated with the inlet 101 and an outlet chamber communicated with the outlet 102. When there is a pressure difference between the two chambers, the piston 122 can slide along the piston chamber 103 under the action of the pressure difference.

[0046] Furthermore, a liquid outlet 104 is also opened on the side wall of the piston chamber 103. When the piston 122 slides in the piston chamber 103, the liquid outlet 104 can be disconnected from or communicated with the inlet 101 of the valve body 121. As Figure 5 shown, when the piston 122 is in the first position, the liquid outlet 104 is disconnected from the inlet 101; as Figure 7 shown, when the piston 122 is in the second position, the liquid outlet 104 is communicated with the inlet 101. Among them, the first position is at one end of the piston chamber 103 close to the inlet 101 of the valve body 121, that is, the left end shown in the figure; and the second position is at one end of the piston chamber 103 close to the outlet 102 of the valve body 121, that is, the right end shown in the figure.

[0047] When the liquid outlet 104 is communicated with the inlet 101, the fire extinguishing agent in the inhibitor bottle 110 can enter the piston chamber 103 through the inlet 101 under the action of the internal pressure, and finally be discharged into the cabinet body through the liquid outlet 104 to achieve automatic fire extinguishing.

[0048] Specifically, in this embodiment, a step (not marked in the figure) is formed at one end of the piston chamber 103 close to the inlet 101, and the piston 122 can be held against the step under the action of the pressure difference to move to the first position.

[0049] The fire detection tube 130 is connected to the outlet 102 and can rupture when reaching a preset temperature. Specifically, the fire detection tube 130 can be pre-filled with gases such as nitrogen to form a relatively high air pressure. When the fire detection tube 130 is heated and the temperature reaches the preset temperature, it can be softened and ruptured, so that the air pressure in the fire detection tube 130 drops sharply.

[0050] Specifically in this embodiment, the fire extinguishing device 100 further includes a ball valve 150 disposed between the outlet 102 and the fire detection tube 130. The ball valve 150 serves as a switch between the outlet 102 and the fire detection tube 130. When the fire extinguishing device 100 is on standby, the ball valve 150 is open. When the fire extinguishing device 100 is idle, the ball valve 150 is closed, so that the air pressure leakage in the fire detection tube 130 can be effectively prevented.

[0051] When the above fire extinguishing device 100 is assembled, sufficient gas can be filled into the fire detection tube 130 so that the air pressure in the fire detection tube 130 is greater than the air pressure in the inhibitor bottle 110. Thus, in the initial state of the fire extinguishing device 100, the piston 122 will be in the first position and remain balanced under the action of the pressure difference, so that the liquid outlet 104 is disconnected from the inlet 101. Moreover, when the pressure in the inlet cavity is higher than the second pressure value of the outlet cavity, the piston 122 can be driven to move from the first position to the second position. Specifically, the second pressure value is determined by the frictional force between the piston 122 and the inner wall of the piston cavity 103 and can be set as needed.

[0052] When a fire breaks out in the cabinet and the fire detection tube 130 ruptures, the air pressure in the fire detection tube 130 drops sharply, resulting in a sudden drop in the pressure of the outlet cavity, and the pressure in the inlet cavity is higher than the second pressure value of the outlet cavity. At this time, the piston 122 will move to the second position under the action of the pressure difference and make the liquid outlet 104 communicate with the inlet 101. The fire extinguishing agent in the inhibitor bottle 110 can enter the piston cavity 103 through the inlet 101 under the action of the internal pressure and is finally discharged into the cabinet through the liquid outlet 104 to achieve automatic fire extinguishing.

[0053] It can be seen that when the above battery cabinet realizes automatic fire extinguishing, it does not require any power supply, nor does it require special smoke and temperature detectors, nor complex signal transmission lines. Utilizing the self-pressure storage of the fire detection tube 130, the inhibitor bottle 110 can be immediately released to extinguish the fire when it ruptures. Moreover, the inhibitor bottle 110 is disposed inside the cabinet, and the fire extinguishing agent discharged from the inhibitor bottle 110 can directly enter the cabinet, so there is no need to set up complex connecting pipelines to introduce the fire extinguishing agent into the cabinet when a fire breaks out.

[0054] Please refer to Figures 5 to 7 , the piston 122 includes a main body 1221, a gas replenishing core 1222 and an elastic member 1223. Among them:

[0055] The main body 1221 can be formed of an elastic material such as rubber. Its outer contour matches the inner contour of the piston chamber 103 and can achieve a seal with the inner wall of the piston chamber 103. The main body 1221 is provided with a guiding channel 105 that penetrates the main body 1221. Specifically, the guiding channel 105 extends along the sliding direction of the piston 122, that is, the left-right direction shown in the figure, and both ends are respectively communicated with the inlet chamber and the outlet chamber. The air replenishing core 1222 can be made of the same material as the main body 1221. Its outer contour matches the outer contour of the guiding channel 105 and can achieve a seal with the inner wall of the guiding channel 105.

[0056] The air replenishing core 1222 is slidably disposed in the guiding channel 105, and the elastic member 1223 provides an elastic force to the air replenishing core 1222. Moreover, under the action of the elastic member 1223, the air replenishing core 1222 is located at the closed position. When the air replenishing core 1222 is at the closed position, the outlet chamber will be disconnected from the inlet chamber, so the inhibitor bottle 110 and the fire detection tube 130 will also be disconnected.

[0057] Furthermore, when the pressure in the inlet chamber is higher than the first pressure value of the outlet chamber, the air replenishing core 1222 can be driven to move from the closed position to the air replenishing position. When the air replenishing core 1222 is at the air replenishing position, the outlet chamber is communicated with the inlet chamber, so the inhibitor bottle 110 will also be communicated with the fire detection tube 130, and the pressure balance can be maintained between the two.

[0058] Wherein, the second pressure value is greater than the first pressure value. It should be noted that the magnitude of the first pressure value is determined by the pre-tightening force of the elastic member 1223 and the frictional force between the air replenishing core 1222 and the guiding channel 105. Therefore, by appropriately selecting the elastic member 1223, the first pressure value can meet the requirements.

[0059] As Figure 5 shown, in the initial state of the fire extinguishing device 100, the air replenishing core 1222 reaches an equilibrium and is in the closed position under the action of the pressures in the inhibitor bottle 110, the fire detection tube 130 and the elastic member 1223. As Figure 6 shown, when there is a slight leakage in the pressure of the fire detection tube 130, and the pressure in the inlet chamber is higher than the first pressure value of the outlet chamber but less than the second pressure value, the whole piston 122 remains stationary, while the air replenishing core 1222 moves towards the outlet chamber to the air replenishing position under the action of the pressure difference. At this time, the outlet chamber is communicated with the inlet chamber, so as to replenish the pressure in the inhibitor bottle 110 into the fire detection tube 130, so that the pressures in the outlet chamber and the inlet chamber return to equilibrium again. After the pressure difference between the outlet chamber and the inlet chamber disappears, the air replenishing core 1222 returns to the closed position again under the action of the elastic member 1223, so as to maintain the stability of the whole piston 122. In this way, the service life of the above-mentioned fire extinguishing device 100 is extended.

[0060] In this embodiment, the main body 1221 is formed with a gas replenishing passage 106. One end of the gas replenishing passage 106 communicates with the outlet cavity, and the other end communicates with the guiding passage 105. The gas replenishing core 1222 in the closed position covers the opening of the gas replenishing passage 106, and the gas replenishing core 1222 in the gas replenishing position exposes the opening of the gas replenishing passage 106.

[0061] When the gas replenishing core 1222 moves to the closed position, the gas replenishing passage 106 is closed; when the gas replenishing core 1222 moves to the gas replenishing position, the gas replenishing passage 106 is opened. At this time, the pressure in the inhibitor bottle 110 can be replenished into the fire detection tube 130.

[0062] In this embodiment, the piston 122 further includes a hollow stud 1124 fixed in the guiding passage 105, and the elastic member 1223 is a compression spring sleeved on the hollow stud 1124 and abutted against the gas replenishing core 1222. The hollow stud 1124 can communicate the guiding passage 105 with the outlet cavity, and the compression spring is convenient to install and has a low cost.

[0063] Specifically in this embodiment, a siphon tube 111 is provided at the bottle mouth of the inhibitor bottle 110, and the siphon tube 111 extends towards the bottom of the inhibitor bottle 110. The fire extinguishing agent in the inhibitor bottle 110 can be led out to the bottle mouth through the siphon tube 111, which is beneficial to fully discharge the fire extinguishing agent at the bottom of the inhibitor bottle 110.

[0064] Specifically in this embodiment, the fire extinguishing device 100 further includes a temperature sensing assembly 160. The temperature sensing assembly 160 is communicated with the inhibitor bottle 110 through the container valve 120, and the temperature sensing assembly 160 can rupture when the preset temperature is reached.

[0065] The temperature sensing assembly 160 can be arranged on the back surface of the box body 140. Specifically, the temperature sensing assembly 160 generally includes a section of closed glass tube. When the ambient temperature near the temperature sensing assembly 160 reaches the preset temperature, the glass tube ruptures. At this time, the temperature sensing assembly 160 will serve as a discharge channel, and the fire extinguishing agent in the inhibitor bottle 110 can overflow into the cabinet through the temperature sensing assembly 160, thereby realizing total flooding fire extinguishing.

[0066] The installation position of the temperature sensing assembly 160 is different from that of the fire detection tube 130. When a fire breaks out in the cabinet but the fire detection tube 130 fails to be triggered in time, the temperature sensing assembly 160 can be used as an auxiliary measure to further improve the safety performance of the battery cabinet.

[0067] Specifically in this embodiment, the fire extinguishing device 100 further includes a pressure gauge 170. The pressure gauge 170 is communicated with the inhibitor bottle 110 through the container valve 120. The pressure gauge 170 can be arranged on the front surface of the box body 140 to monitor the pressure in the inhibitor bottle 110 in real time.

[0068] Specifically in this embodiment, the fire extinguishing device 100 further includes a signal feedback component 181 and a communication board 182. The signal feedback component 182 communicates with the inhibitor bottle 110 through the container valve 120 and is electrically connected to the communication board 182. The communication board 182 can be disposed on the front surface of the cabinet 140, and the signal feedback component 182 can introduce a pressure signal from the container valve 120 and transmit it to the communication board 182, thereby monitoring the working state of the fire extinguishing device 100.

[0069] Specifically in this embodiment, the fire extinguishing device 100 further includes a spraying component 190. The spraying component 190 includes a pipeline (not shown in the figure) communicating with the liquid outlet 104 and a nozzle 191 connected to the end of the pipeline. The fire extinguishing agent discharged through the liquid outlet 104 will be sprayed by the nozzle 191, so that the fire extinguishing agent can be directly sprayed on the fire point. Compared with total flooding fire extinguishing, this fire extinguishing method can save fire extinguishing agent and is also applicable to open cabinets.

[0070] Furthermore, in this embodiment, there are multiple nozzles 191, which are distributed in the cabinet. The multiple distributed nozzles 191 can spray the fire extinguishing agent more evenly, thereby improving the fire extinguishing effect.

[0071] In the above battery cabinet, when a fire breaks out in the cabinet and the temperature rises above the preset temperature, the fire detection tube 130 ruptures, so that the pressure in the outlet cavity drops suddenly, and the pressure in the inlet cavity is higher than the second pressure value of the outlet cavity. At this time, the piston 122 moves to the second position, the liquid outlet 104 is communicated with the inlet 101, and the fire extinguishing agent in the inhibitor bottle 110 can enter the piston cavity 103 from the inlet 101 and be discharged to the cabinet through the liquid outlet 104 to achieve automatic fire extinguishing. When there is a slight leakage of pressure in the fire detection tube 130, and the pressure in the inlet cavity is higher than the first pressure value of the outlet cavity but less than the second pressure value, the piston 122 remains stationary as a whole, while the air replenishing core 1222 moves towards the outlet cavity to the air replenishing position under the action of the pressure difference. At this time, the outlet cavity is communicated with the inlet cavity, so as to replenish the pressure in the inhibitor bottle 110 into the fire detection tube 130, so that the pressure between the outlet cavity and the inlet cavity returns to balance again. After the pressure difference between the outlet cavity and the inlet cavity disappears, the air replenishing core 1222 returns to the closed position again under the action of the elastic member 1223, thereby maintaining the stability of the piston 122 as a whole. In this way, the service life of the above fire extinguishing device 100 is extended.

[0072] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0073] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A container valve, characterized in that, Comprising: A valve body having an inlet, an outlet, and a piston chamber located between the inlet and the outlet, and a liquid outlet is further provided on the side wall of the piston chamber; And A piston slidably disposed in the piston chamber to divide the piston chamber into an inlet chamber communicating with the inlet and an outlet chamber communicating with the outlet, and the piston can be switched between a first position where the liquid outlet is disconnected from the inlet and a second position where the liquid outlet is communicated with the inlet; the piston includes a main body, a gas replenishing core, and an elastic member, the main body is provided with a guiding channel penetrating the main body, the gas replenishing core is slidably disposed in the guiding channel, and under the action of the elastic member, the gas replenishing core is located at a closed position where the outlet chamber is disconnected from the inlet chamber, and when the inlet chamber is higher than the outlet chamber by a first pressure value, the gas replenishing core can be driven to move from the closed position to a gas replenishing position where the outlet chamber is communicated with the inlet chamber; Wherein, when the inlet chamber is higher than the outlet chamber by a second pressure value, the piston can be driven to move from the first position to the second position, and the second pressure value is greater than the first pressure value; A step is formed at one end of the piston chamber close to the inlet, and the piston abuts against the step under the action of a pressure difference to move to the first position.

2. The container valve according to claim 1, characterized in that, The main body is formed with a gas replenishing channel, one end of the gas replenishing channel communicates with the outlet chamber, and the other end communicates with the guiding channel. The gas replenishing core at the closed position covers the opening of the gas replenishing channel, and the gas replenishing core at the gas replenishing position exposes the opening of the gas replenishing channel.

3. The container valve according to claim 1, wherein The piston further includes a hollow stud fixed in the guiding channel, and the elastic member is a compression spring sleeved on the hollow stud and abutted against the gas replenishing core.

4. A fire extinguishing device, characterized in that, Comprising: An inhibitor bottle; A fire detection tube that can rupture when reaching a preset temperature; And The container valve according to any one of claims 1 to 3 above, the inlet communicates with the bottle mouth of the inhibitor bottle, and the outlet communicates with the fire detection tube; Wherein, in the initial state of the fire extinguishing device, the piston is located at the first position, and the gas replenishing core is located at the closed position.

5. The fire extinguishing device according to claim 4, wherein, It further includes a temperature sensing assembly, the temperature sensing assembly communicates with the inhibitor bottle through the container valve, and the temperature sensing assembly can rupture when reaching a preset temperature.

6. The fire extinguishing device according to claim 4, wherein, It further includes a signal feedback assembly and a communication board, the signal feedback assembly communicates with the inhibitor bottle through the container valve and is electrically connected to the communication board.

7. The fire extinguishing device according to claim 4, characterized in that, It further includes a ball valve disposed between the outlet and the fire detection tube.

8. The fire extinguishing device according to claim 4, characterized in that, The fire extinguishing device further includes a spraying assembly, and the spraying assembly includes a pipeline communicating with the liquid outlet and a nozzle connected to the end of the pipeline.

9. The fire extinguishing device according to any one of claims 4 to 8, characterized in that, The fire extinguishing device further includes a box body, the box body is fixed in a receiving cavity, and the inhibitor bottle is fixed in the box body.

10. A battery cabinet, characterized in that, Comprising: A cabinet; And the fire extinguishing device according to any one of claims 4 to 9 above, the fire extinguishing device is installed in the cabinet.

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