CN218546014U - Detection apparatus for negative pressure equipment validity that leaks hunting and negative pressure system that leaks hunting - Google Patents
Detection apparatus for negative pressure equipment validity that leaks hunting and negative pressure system that leaks hunting Download PDFInfo
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- CN218546014U CN218546014U CN202222667102.1U CN202222667102U CN218546014U CN 218546014 U CN218546014 U CN 218546014U CN 202222667102 U CN202222667102 U CN 202222667102U CN 218546014 U CN218546014 U CN 218546014U
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Abstract
The utility model belongs to the technical field of the battery detects, a detection device and negative pressure system of leaking hunting of negative pressure equipment validity is related to. The detection device comprises a container and a negative pressure switch, and the container is communicated with the closed cavity through the negative pressure switch. The negative pressure leak detection system comprises negative pressure leak detection equipment and a detection device, the negative pressure leak detection equipment comprises a closed cavity, the detection device is arranged in the closed cavity, and the container is communicated with the closed cavity through a negative pressure switch; the vacuumizing assembly is used for vacuumizing the closed cavity so that the closed cavity forms a negative pressure state; the air-entrapping assembly is used for entrapping air into the closed cavity so that the closed cavity reaches a preset pressure state; the negative pressure switch is opened in a negative pressure state and closed in a preset pressure state, so that the container can release a preset amount of detection substances to the closed cavity through the negative pressure switch; and a measuring assembly for measuring the concentration of the detection substance flowing to the measuring assembly. The application can improve the test accuracy.
Description
Technical Field
The utility model relates to a battery detection technology field especially relates to a detection apparatus and negative pressure system of leaking hunting of negative pressure equipment validity.
Background
The detection of battery leakage is an important index for evaluating the safety and reliability of the battery. The current commonly used battery leakage detection scheme can be divided into a positive pressure leakage detection mode and a negative pressure leakage detection mode.
The negative pressure leakage detection scheme depends on a VOC (volatile organic compound) instrument, has high detection rate and zero damage to the battery, and has important significance for leakage detection. In recent years, this method is also being improved, for example, chinese patent application No. CN202210166270.4 discloses "a method and a device for detecting battery leakage", which improves the detection rate of negative pressure leakage detection by filling a positive pressure method in a closed chamber.
The negative pressure leak hunting equipment relies on the effective intercommunication of airtight chamber, positive negative pressure pipeline, pneumatic valve and concentration meter, just can survey accurate data. Therefore, the effectiveness of the negative pressure leakage detection equipment needs to be detected and verified, and the accuracy of the detection data is ensured.
In the related art, the scheme for detecting the effectiveness of the negative pressure leakage detection equipment is to puncture a battery, enable an electrolyte solvent to flow out, and place the damaged battery into a closed chamber. And setting negative pressure of the closed chamber, volatilizing the solvent in the damaged battery, entering the VOC instrument through a pipeline, and measuring data. In the scheme, the punctured battery cannot be reused, the cost is high, batteries of different types of electrolyte have no universality, the punctured caliber and the position of the battery are not fixed, the leakage amount cannot be quantified, and the validity detection verification data is inaccurate.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide a detection device and negative pressure system of leaking hunting of negative pressure equipment validity solves the negative pressure equipment validity of leaking hunting of current battery and detects the technical problem that the cost is higher, the verification data is unsafe.
In order to solve the technical problem, the embodiment of the utility model provides a detection apparatus for negative pressure equipment effectiveness leaks hunting, negative pressure equipment leaks hunting includes airtight cavity, has adopted as follows technical scheme:
the device for detecting the effectiveness of the negative pressure leakage detection equipment comprises a container and a negative pressure switch, wherein the container is communicated with the closed cavity through the negative pressure switch, the negative pressure switch is opened when the closed cavity is in a negative pressure state, and is closed when the closed cavity is in a preset pressure state, so that the container can release a preset amount of detection substances to the closed cavity through the negative pressure switch.
In a preferable scheme of some embodiments, the detection device further comprises a flow meter communicated with the container and connected with the negative pressure switch, and the flow meter is used for measuring the flow rate of the electrolyte solvent in the container released to the closed cavity and transmitting the flow rate value to the negative pressure switch.
In order to solve the technical problem, the embodiment of the utility model provides a negative pressure system of leaking hunting still provides, has adopted as follows technical scheme:
the negative pressure leakage detection system comprises negative pressure leakage detection equipment and a detection device for detecting the effectiveness of the negative pressure leakage detection equipment, wherein the negative pressure leakage detection equipment comprises a closed cavity, the detection device is arranged in the closed cavity, and the container is communicated with the closed cavity through the negative pressure switch; the vacuumizing assembly is communicated with the closed cavity and is used for vacuumizing the closed cavity to enable the closed cavity to form a negative pressure state; the air-entrapping assembly is communicated with the closed cavity and is used for entrapping air into the closed cavity so that the closed cavity reaches a preset pressure state; the negative pressure switch is opened in the negative pressure state and closed in the preset pressure state, so that the container can release a preset amount of detection substances to the closed cavity through the negative pressure switch; and the measuring component is communicated with the closed cavity and is used for measuring the concentration of a detection substance which flows from the closed cavity to the measuring component.
In a preferred aspect of some embodiments, the vacuum pumping assembly includes a vacuum pump, a vacuum valve, and a vacuum pipeline, the vacuum pump is communicated with the sealed cavity through the vacuum pipeline, and the vacuum valve is disposed on the vacuum pipeline.
In a preferred scheme of some embodiments, the gas filling assembly comprises a gas inlet pipeline and a gas inlet valve, the gas inlet pipeline is communicated with the closed cavity, and the gas inlet valve is arranged on the gas inlet pipeline.
In a preferred version of some embodiments, the air intake valve includes a first air valve and a second air valve, and the flow regulation precision of the first air valve is greater than the flow regulation precision of the second air valve.
In a preferred version of some embodiments, the measuring assembly includes a concentration meter, a measuring pipe and a measuring valve, the concentration meter is communicated with the closed cavity through the measuring pipe, and the concentration meter is used for measuring the concentration of the electrolyte solvent.
In a preferred scheme of some embodiments, the negative pressure leakage detection device further comprises a controller, wherein the controller is connected with the concentration meter, obtains a measured value of the concentration meter, compares the measured value with a preset value, and outputs a comparison result.
In a preferred scheme of some embodiments, the controller includes a main control unit and a display unit, the main control unit is respectively connected with the concentration meter and the display unit, obtains a measurement value of the concentration meter, compares the measurement value with a preset value, and outputs a comparison result to the display unit for displaying.
In a preferable scheme of some embodiments, the negative pressure leakage detection device further includes a barometer connected to the controller, the barometer is used for measuring a pressure value of the sealed cavity, and the controller controls the gas filling assembly to be opened and closed according to the pressure value.
Compared with the prior art, the embodiment of the utility model provides a detection device and negative pressure system of leaking hunting of negative pressure equipment validity mainly have following beneficial effect:
this detection device is through setting up container and negative pressure switch, negative pressure switch opens under the airtight cavity of negative pressure equipment for leaking hunting is in the negative pressure state, and close under airtight cavity is in predetermineeing the pressure state, so that the container can release the detection material of predetermined volume to airtight cavity through negative pressure switch, the measuring component of negative pressure equipment for leaking hunting measures the concentration of the detection material of predetermined volume of release, thereby realize that negative pressure equipment for leaking hunting validity detects, adopt the measuring method of container and negative pressure switch replacement original damaged battery, whole check-up process detection material quantitative test, improve the accuracy of test, and need not to destroy the battery specially, and reduce cost, also can change the detection material sample in the container according to the detection standard of difference, the reuse rate is high.
Drawings
In order to illustrate the solution of the present invention more clearly, the drawings needed for describing the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts. Wherein:
fig. 1 is a schematic structural diagram of a detection device for effectiveness of a negative pressure leak detection device of the present invention;
FIG. 2 is a schematic structural view of the negative pressure leak detection system of the present invention;
fig. 3 is a block diagram of the controller according to the present invention.
The reference numbers in the drawings are as follows:
100. a detection device; 110. a container; 120. a negative pressure switch; 130. a flow meter;
200. negative pressure leak detection equipment; 210. sealing the cavity; 220. a vacuum pumping assembly; 221. a vacuum pump; 222. A vacuum valve; 223. a vacuum line; 230. a gas adding assembly; 231. an air intake duct; 232. an intake valve; 240. A measurement component; 241. a concentration meter; 242. measuring a pipeline; 243. a measuring valve; 250. a controller; 251. A main control unit; 252. a display unit.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, for example, the terms "length," "width," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or position illustrated in the drawings, which are for convenience of description only and are not to be construed as limiting of the present disclosure.
The terms "including" and "having," and any variations thereof, in the description and claims of this invention and the description of the above figures are intended to cover non-exclusive inclusions; the terms "first," "second," and the like in the description and claims of the present invention or in the above-described drawings are used for distinguishing between different objects and not for describing a particular sequential order. The meaning of "plurality" is two or more unless specifically limited otherwise.
In the description and claims of the present invention and in the description of the above figures, when an element is referred to as being "fixed" or "mounted" or "disposed" or "connected" to another element, it can be directly or indirectly located on the other element. For example, when an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.
Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The detection of battery leakage is an important index for evaluating the safety and reliability of the battery. The negative pressure leakage detection device 200 is used for detecting the leakage of the battery, and is an important device for evaluating the safety and reliability of the battery. Therefore, it is important to detect the effectiveness of the negative pressure leak detection apparatus 200.
The following describes in detail specific embodiments of the negative pressure leak detection device 100 and the negative pressure leak detection system according to the present invention with reference to the drawings.
Referring to fig. 1 and 2, the present application provides a device 100 for detecting the effectiveness of a negative pressure leakage detection apparatus 200. The negative pressure leak detection device 200 includes a sealed cavity 210. The detection device 100 includes a container 110 and a negative pressure switch 120.
The container 110 is communicated with the sealed cavity 210 through the negative pressure switch 120. The material of the container 110 is a corrosion-resistant and hard plastic, such as polypropylene and polytetrafluoroethylene, but is not limited thereto. The container 110 may contain a detection substance. The detection substance may be a single component gas, a multi-component gas, a single electrolyte solvent, a multi-component electrolyte solvent, an electrolyte, or the like, and thus different detection substances are selected based on different detection standards of the negative pressure leak detection apparatus 200.
The negative pressure switch 120 is opened when the sealed cavity 210 is in a negative pressure state, and is closed when the sealed cavity 210 is in a preset pressure state, so that the container 110 can release a preset amount of the detection substance to the sealed cavity 210 through the negative pressure switch 120.
The utility model provides a detection apparatus 100 is through adopting container 110 and negative pressure switch 120, negative pressure switch 120 is opened under the airtight cavity 210 of negative pressure equipment 200 that leaks hunting, and close under airtight cavity 210 is in preset pressure state, so that container 110 can release the detection material of predetermineeing the volume to airtight cavity 210 through negative pressure switch 120, replace the measuring method of original damaged battery, detect the validity of negative pressure equipment 200 that leaks hunting, the volume of detection material is controllable, improve the accuracy of test, and need not to destroy the battery specially, and therefore, the cost is reduced, also can change the detection material sample in container 110 according to the detection standard of difference, the reuse rate is high.
The preset pressure state may be that the air pressure of the sealed cavity 210 is the same as the atmospheric pressure or is a positive pressure state, or may be an air pressure value set by the user.
Referring to fig. 1 and 2, the detection apparatus 100 further includes a flow meter 130. The flow meter 130 is communicated with the container 110 and connected with the negative pressure switch 120, and the flow meter 130 is used for measuring the flow rate of the electrolyte solvent in the container 110 released to the closed cavity 210 and transmitting the flow rate value to the negative pressure switch 120. In practical operation, the negative pressure switch 120 can control itself to release the volatile electrolyte solvent at a certain flow rate according to the flow rate value measured by the flow meter 130, and the concentration range of the volatile gas is 100-10000 ppd.
Referring to fig. 2, the present application further provides a negative pressure leak detection system. The negative pressure leakage detection system comprises a negative pressure leakage detection device 200 and the detection device 100 for the effectiveness of the negative pressure leakage detection device. The negative pressure leakage detection device 200 can be used for detecting the leakage of the battery and can detect the effectiveness of the negative pressure leakage detection device 100.
The negative pressure leak detection device 200 comprises a closed cavity 210, a vacuum pumping assembly 220, a gas filling assembly 230 and a measuring assembly 240.
The detection device 100 is disposed in the sealed cavity 210. The container 110 is connected to the sealed chamber 210 through the negative pressure switch 120, and the detection substance can be released to the sealed chamber 210 through the negative pressure switch 120.
The vacuum pumping assembly 220 is in communication with the enclosed cavity 210. The vacuum pumping assembly 220 is used for pumping vacuum to the sealed cavity 210, so that the sealed cavity 210 forms a negative pressure state. In the negative pressure state, when the detection substance is a liquid, the liquid is vaporized. Therefore, in the negative pressure state, the negative pressure switch 120 is turned on, and the detection substance using the liquid is finally released in a gaseous form to the sealed chamber 210 through the negative pressure switch 120. The state of the sealed cavity 210 under negative pressure refers to a state of gas pressure in which the gas pressure of the sealed cavity 210 is lower than normal pressure.
The air entrainment assembly 230 is in communication with the enclosed cavity 210. The air-entrapping assembly 230 is configured to entrap air in the sealed chamber 210, so that the sealed chamber 210 reaches a predetermined pressure state. In the preset pressure state, the negative pressure switch 120 is closed, and the detection substance in the sealed cavity 210 flows to the measurement component 240.
The measurement assembly 240 is in communication with the enclosed cavity 210. The measurement assembly 240 measures the concentration of the detection substance that flows from the sealed chamber 210 to the measurement assembly 240.
According to the application, the container 110 and the negative pressure switch 120 are arranged in the sealed cavity 210, the vacuumizing assembly 220 is used for vacuumizing the sealed cavity 210, the sealed cavity 210 is enabled to form a negative pressure state, the air-entrapping assembly 230 is used for entrapping air into the sealed cavity 210, the sealed cavity 210 is enabled to reach a preset pressure state, the negative pressure switch 120 is opened in the negative pressure state and is closed in the preset pressure state, so that the container 110 can release a preset amount of electrolyte solvent to the sealed cavity 210 through the negative pressure switch 120, the measuring assembly 240 is used for measuring the concentration of a detection substance which flows from the sealed cavity 210 to the measuring assembly 240, the container 110 and the negative pressure switch 120 are used for replacing an original measurement mode of a damaged battery, the detection on the effectiveness of the negative pressure leakage detection device 200 is realized, the amount of the detection substance is controllable, the quantitative test in the whole verification process is realized, the accuracy of the test is improved, the battery does not need to be specially damaged, the cost is reduced, a detection substance sample in the container 110 can be replaced according to different detection standards, the reusability is high, and the effectiveness detection on the negative pressure leakage detection device 200 can be suitable for effectiveness detection in different detection schemes.
In one embodiment, referring to fig. 2, the evacuation assembly 220 includes a vacuum pump 221, a vacuum valve 222, and a vacuum conduit 223. The vacuum pump 221 communicates with the hermetic chamber 210 through a vacuum pipe 223. The vacuum valve 222 is provided on the vacuum pipe 223. The vacuum pump 221 evacuates the sealed chamber 210 through the vacuum pipe 223, so that the sealed chamber 210 reaches a required vacuum degree, and a negative pressure state is formed in the sealed chamber 210. The vacuum valve 222 may close the vacuum pipe 223 after the sealed chamber 210 reaches a required vacuum degree, so that the vacuum pump 221 cannot continue to evacuate the sealed chamber 210.
In one embodiment, referring to fig. 2, the aeration assembly 230 includes an inlet conduit 231 and an inlet valve 232. The air inlet pipe 231 communicates with the hermetic chamber 210. An intake valve 232 is provided on the intake pipe 231. After the air inlet valve 232 is opened, air enters the sealed cavity 210 through the air inlet pipe 231, so that the sealed cavity 210 reaches a preset pressure state, and the air inlet valve 232 is closed. In this predetermined pressure state, the detection substance in the sealed cavity 210 can flow to the measurement component 240.
Specifically, intake valve 232 may include a first valve and a second valve. The flow regulation precision of the first air valve is greater than that of the second air valve. Namely, the first air valve adopts a fine adjustment air valve, and the second air valve adopts a coarse adjustment air valve. By adjusting the first air valve and the second air valve, the air inlet flow of the air inlet pipe 231 can be more accurately adjusted, so that the air pressure value in the closed cavity 210 reaches a preset value.
In one embodiment, referring to FIG. 2, the measurement assembly 240 includes a concentration meter 241, a measurement conduit 242, and a measurement valve 243. The concentration meter 241 is communicated with the closed cavity 210 through a measuring pipe 242. The concentration meter 241 is used to measure the concentration of the electrolyte solvent. The concentration meter 241 may use a VOC meter to detect the concentration of the electrolyte solvent.
When the sealed cavity 210 is in a preset pressure state, the measuring valve 243 is opened, the detection substance in the sealed cavity 210 flows to the concentration meter 241 through the measuring pipeline 242, and the concentration meter 241 measures the concentration of the electrolyte solvent.
Referring to fig. 2 and 3, the negative pressure leak detection apparatus 200 of the present application further includes a controller 250. The controller 250 is connected to the concentration meter 241, obtains a measurement value of the concentration meter 241, compares the measurement value with a preset value, and outputs a comparison result, so that a user can determine the effectiveness of the device according to the comparison result.
Specifically, the controller 250 includes a main control unit 251 and a display unit 252. The main control unit 251 is connected to the concentration meter 241 and the display unit 252, respectively, obtains a measurement value of the concentration meter 241, compares the measurement value with a preset value, and outputs a comparison result to the display unit 252 for display. The user can know the measurement result through the display unit 252. The main control unit 251 compares the measured value with a preset value, and may be implemented by an existing chip or a logic comparison circuit. Although the main control unit 251 participates in the running process of the software program, the software programs run by the auxiliary main control unit 251 are all existing software programs which can be copied, and do not form the innovation point of the application.
The negative pressure leak detection apparatus 200 may further include a vacuum gauge. The vacuum gauge is connected to a controller 250. The vacuum gauge is used to measure the degree of vacuum of the sealed chamber 210. The controller 250 controls the vacuum assembly 220 to be turned on and off according to the vacuum level measured by the vacuum gauge.
Specifically, when the sealed cavity 210 needs to be evacuated, the controller 250 controls to open the vacuum valve 222 of the evacuation assembly 220, and controls the vacuum pump 221 to evacuate the sealed cavity 210, the vacuum gauge detects the vacuum degree of the sealed cavity 210, when the detected vacuum degree reaches a preset vacuum degree value, a signal is fed back to the controller 250, and the controller 250 controls to close the vacuum valve 222, and the evacuation is stopped. In actual operation, the preset vacuum degree value can be-80 to-98 kpa. Under a preset pressure state, the vacuum degree of the sealed cavity 210 is 10-20 pa. When the vacuum pump 221 fails or the airtight cavity 210 is not airtight, the controller 250 may alarm to prompt that the vacuum degree cannot reach the set value.
The negative pressure leak detection apparatus 200 may further include a barometer. The barometer is connected to the controller 250. The air pressure gauge is used for measuring the air pressure value of the closed cavity 210. The controller 250 controls the opening and closing of the air-entrapping assembly 230 according to the air pressure measured by the air pressure gauge.
Specifically, when the sealed cavity 210 needs to be filled with gas to reach a preset pressure state, the controller 250 controls to open the gas inlet valve 232 of the gas inlet assembly, the gas enters the sealed cavity 210 through the gas inlet pipe 231 to fill the sealed cavity 210 with gas, and the gas pressure gauge detects the gas pressure of the sealed cavity 210. When the detected air pressure value reaches the air pressure value in the positive pressure state, the controller 250 controls to close the air inlet valve 232 and stop filling air into the closed cavity 210.
Although the controller 250 controls the vacuum valve 222 and the intake valve 232 by software programs in the operation process, the software programs operated by the auxiliary controller 250 are all reproducible software programs, and do not form the innovation point of the present application.
Referring to fig. 2 and 3, the specific working principle of the detection device 100 in the negative pressure leakage detecting system for detecting the effectiveness of the negative pressure leakage detecting apparatus 200 is as follows:
the controller 250 controls to open the vacuum valve 222 and the vacuum pump 221 of the vacuum pumping assembly 220. The vacuum pump 221 evacuates the sealed chamber 210. The vacuum gauge detects the degree of vacuum of the sealed chamber 210. When the detected vacuum degree reaches a preset vacuum degree value, the controller 250 controls to close the vacuum valve 222 and the vacuum pump 221, and the vacuum pumping is stopped. At this time, a negative pressure state is formed in the sealed cavity 210. The negative pressure state of the sealed cavity 210 is maintained for a certain period of time, which may be 5 to 60 seconds, and in this state, the negative pressure switch 120 is turned on, and the detection substance in the container 110 is released into the sealed cavity 210 through the negative pressure switch 120. The controller 250 controls to open the air inlet valve 232 of the gas filling assembly 230, and the gas enters the sealed cavity 210 through the air inlet pipe 231 of the gas filling assembly 230 to fill the sealed cavity 210 with gas. The barometer detects the air pressure in the sealed cavity 210, and when the detected air pressure exceeds a preset air pressure value. The controller 250 controls to close the air inlet valve 232 to stop filling the air into the sealed cavity 210. At this time, the sealed cavity 210 is in a preset pressure state, the negative pressure switch 120 is turned off, and the container 110 releases a fixed amount of the detection substance to the sealed cavity 210 through the negative pressure switch 120. The controller 250 controls to open the measuring valve 243 of the measuring unit 240, the detection substance in the sealed cavity 210 flows to the concentration meter 241 of the measuring unit 240 through the measuring pipe 242, and the concentration meter 241 detects the detection substance and transmits the detection value to the controller 250. The controller 250 compares the acquired detection value with a preset value, and displays the comparison result through the display unit 252 thereof, so that the user can know the detection result through the display unit 252, thereby evaluating the effectiveness of the system.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a detection apparatus for negative pressure equipment effectiveness that leaks hunting, negative pressure equipment that leaks hunting includes airtight cavity, its characterized in that, detection apparatus includes container and negative pressure switch, the container passes through negative pressure switch with airtight cavity intercommunication, negative pressure switch is in airtight cavity is opened under the negative pressure state, and airtight cavity is closed under the pressure state of predetermineeing, so that the container can pass through negative pressure switch release predetermined volume's detection material extremely airtight cavity.
2. The testing device of claim 1, further comprising a flow meter in communication with the container and connected to the negative pressure switch, the flow meter being configured to measure a flow rate of the test substance in the container released into the sealed chamber and transmit the flow rate value to the negative pressure switch.
3. A negative pressure leak detection system comprising a negative pressure leak detection apparatus and a detection device of the effectiveness of the negative pressure leak detection apparatus according to claim 1 or 2, the negative pressure leak detection apparatus comprising:
the detection device is arranged in the closed cavity, and the container is communicated with the closed cavity through the negative pressure switch;
the vacuumizing assembly is communicated with the closed cavity and is used for vacuumizing the closed cavity so that the closed cavity forms a negative pressure state;
the air-entrapping assembly is communicated with the closed cavity and is used for entrapping air into the closed cavity so that the closed cavity reaches a preset pressure state;
the negative pressure switch is opened in the negative pressure state and closed in the preset pressure state, so that the container can release a preset amount of detection substances to the closed cavity through the negative pressure switch;
and the measuring component is communicated with the closed cavity and is used for measuring the concentration of a detection substance which flows from the closed cavity to the measuring component.
4. The negative pressure leak hunting system according to claim 3, wherein the vacuum pumping assembly comprises a vacuum pump, a vacuum valve and a vacuum pipeline, the vacuum pump is communicated with the sealed cavity through the vacuum pipeline, and the vacuum valve is disposed on the vacuum pipeline.
5. The negative pressure leak hunting system of claim 3, wherein the air entrainment assembly comprises an air inlet duct and an air inlet valve, the air inlet duct is communicated with the closed cavity, and the air inlet valve is arranged on the air inlet duct.
6. The negative pressure leak detection system of claim 5, wherein the air intake valve comprises a first air valve and a second air valve, and wherein the first air valve has a flow regulation accuracy greater than the flow regulation accuracy of the second air valve.
7. The negative pressure leak hunting system according to claim 3, wherein the measuring assembly comprises a concentration meter, a measuring pipe, and a measuring valve, the concentration meter is communicated with the sealed cavity through the measuring pipe, and the concentration meter is used for measuring the concentration of a detection substance.
8. The negative pressure leakage detection system of claim 7, further comprising a controller connected to the concentration meter, wherein the controller is configured to obtain a measurement value from the concentration meter, compare the measurement value with a preset value, and output a comparison result.
9. The negative pressure leakage detection system of claim 8, wherein the controller comprises a main control unit and a display unit, the main control unit is respectively connected with the concentration meter and the display unit, obtains the measurement value of the concentration meter, compares the measurement value with a preset value, and outputs the comparison result to the display unit for displaying.
10. The negative pressure leakage detection system of claim 8, further comprising a barometer connected to the controller, wherein the barometer is configured to measure a pressure value of the sealed cavity, and the controller controls the air entrainment assembly to open and close according to the pressure value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222667102.1U CN218546014U (en) | 2022-10-10 | 2022-10-10 | Detection apparatus for negative pressure equipment validity that leaks hunting and negative pressure system that leaks hunting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222667102.1U CN218546014U (en) | 2022-10-10 | 2022-10-10 | Detection apparatus for negative pressure equipment validity that leaks hunting and negative pressure system that leaks hunting |
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| CN218546014U true CN218546014U (en) | 2023-02-28 |
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| CN202222667102.1U Active CN218546014U (en) | 2022-10-10 | 2022-10-10 | Detection apparatus for negative pressure equipment validity that leaks hunting and negative pressure system that leaks hunting |
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