CN113465832A - Double-pressure air tightness measuring instrument - Google Patents
Double-pressure air tightness measuring instrument Download PDFInfo
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- CN113465832A CN113465832A CN202110734061.0A CN202110734061A CN113465832A CN 113465832 A CN113465832 A CN 113465832A CN 202110734061 A CN202110734061 A CN 202110734061A CN 113465832 A CN113465832 A CN 113465832A
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- 238000009530 blood pressure measurement Methods 0.000 abstract description 4
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
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- 230000004075 alteration Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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Abstract
The application discloses two pressure gas tightness measuring apparatuss, including casing subassembly, control assembly, water oil separating subassembly, valve island subassembly, atmospheric pressure detection subassembly, atmospheric pressure buffering subassembly and pressure regulating subassembly, the casing subassembly includes preceding shell, drain pan and backshell, and preceding shell, backshell and drain pan surround into the shell body of width under the narrow, and control assembly connects the inboard of casing subassembly, and control assembly includes display touch screen and controller, and display touch screen locates on preceding shell, and the valve island subassembly is connected inboard of casing subassembly, has airflow channel in the valve island subassembly, and the detection terminal of atmospheric pressure detection subassembly is connected in the airflow channel of valve island subassembly; the air pressure buffering assembly comprises a pressure stabilizing tank, the pressure regulating assembly is connected in the air flow channel, and the pressure regulating assembly regulates the air pressure in the air flow channel to be kept at a first air pressure or a second air pressure. According to the embodiment of the application, the double-pressure air tightness measuring instrument has the advantages of double-pressure measurement, simplicity, portability and strong universality.
Description
Technical Field
The application relates to the technical field of air tightness measurement, in particular to a double-pressure air tightness measuring instrument.
Background
Along with the quality improvement and efficiency improvement of social economy, the new energy industry is greatly developed, and the application of new energy batteries is more and more extensive. The performance of a new energy battery, such as a lithium ion battery, a nickel-metal hydride battery, a fuel cell, a lead-acid battery, a super capacitor, and the like, directly affects new energy products, and generally, the new energy battery needs to realize the conversion of electric energy through internal chemical reactions, which need to be performed in a vacuum environment, so that the requirement on the air tightness of the new energy battery is strict. Meanwhile, the new energy battery is commonly used along with a battery cooling system, so that the safety and the stability of the new energy battery are ensured. However, the detection of the airtightness of the new energy battery itself and the detection of the airtightness of the cooling system require different test conditions and different air pressure. In the actual test process, two sets of instruments are usually used for respectively measuring the air tightness of the battery and the air tightness of a battery cooling system, so that the operation is complicated, and the universality is poor.
Disclosure of Invention
An object of this application is to provide a two pressure gas tightness measuring apparatuss, has two pressure measurements, and is simple portable, advantage that the commonality is strong.
The double-pressure air tightness measuring instrument comprises a shell assembly, a control assembly, an oil-water separation assembly, a valve island assembly, an air pressure detection assembly, an air pressure buffering assembly and a pressure regulating assembly, wherein the shell assembly comprises a front shell, a bottom shell and a rear shell, the front shell and the rear shell are respectively arranged at the front end and the rear end of the bottom shell, the front shell and the rear shell extend obliquely from the bottom shell to a direction close to each other, the front shell, the rear shell and the bottom shell surround to form an outer shell with a narrow upper part and a wide lower part, a handle part is arranged at the upper end of the outer shell, a first shell and a second shell are arranged on the front shell, the first shell and the second shell are respectively connected to the left side and the right side of the front shell, and at least one of the first shell and the second shell is provided with an air inlet and an air outlet; the control assembly is connected to the inner side of the shell assembly and comprises a display touch screen and a controller, the display touch screen is arranged on the front shell and is connected with the controller; the oil-water separation component is connected to at least one of the air inlet and the air outlet; the valve island assembly is connected to the inner side of the shell assembly, and an air flow channel is arranged in the valve island assembly and is respectively communicated with the air inlet and the air outlet; the air pressure detection assembly is connected with the valve island assembly, and a detection terminal of the air pressure detection assembly is connected in an air flow channel of the valve island assembly; the air pressure buffer assembly is connected between the valve island assembly and the air inlet and comprises a pressure stabilizing tank, and the pressure stabilizing tank is a container with internal air suitable for buffering air; the pressure regulating subassembly is located casing unit's inboard is connected in the airflow channel, the adjustment of pressure regulating subassembly atmospheric pressure in the airflow channel keeps at first atmospheric pressure or second atmospheric pressure, the case is dialled including driving motor, air-vent valve and speed governing to the pressure regulating subassembly, the incasement is dialled to the speed governing is equipped with drive mechanism, driving motor connects the transmission mechanism that the incasement was dialled to the speed governing connects the controller, drive mechanism drives the air-vent valve carries out the atmospheric pressure adjustment action.
According to two pressure gas tightness measuring apparatuss of this application embodiment, with the control assembly, the water oil separating subassembly, the valve island subassembly, the atmospheric pressure determine module, atmospheric pressure buffer unit and pressure regulating subassembly are whole integrated in casing assembly, compact structure is portable, through setting up the pressure regulating subassembly, can stabilize at first atmospheric pressure and second atmospheric pressure with air current atmospheric pressure value in the product, do benefit to the gas tightness that detects sample under the first atmospheric pressure requirement and the gas tightness of sample under the second atmospheric pressure requirement, consequently, this two pressure gas tightness measuring apparatuss's commonality is stronger.
In addition, the dual-pressure air tightness measuring instrument according to the above embodiments of the present application may further have the following additional technical features:
in some embodiments, the first air pressure is in a range of 10kpa or less and the second air pressure is in a range of 10kpa to 500 kpa.
In some embodiments, the front shell is provided with a window, the touch display screen is embedded into the window, a toughened film is attached to the touch display screen, the front shell further comprises a panel, the panel covers the touch screen and fixes the touch screen on the panel, and the panel is provided with an opening corresponding to the touch display screen.
In some embodiments, the panel is further provided with a key, and the key is connected with the controller.
In some embodiments, the valve island assembly includes an island body and an electromagnetic valve, the electromagnetic valve is connected to the controller, the airflow passage is disposed in the island body, the airflow passage is connected to the air pressure detection assembly, the island body is provided with a fixing position, and the air pressure detection assembly is fixedly connected to the fixing position through a fixing member.
In some embodiments, the air pressure detection assembly includes a pressure sensor coupled to the controller.
In some embodiments, the pressure regulating subassembly still includes the bottom plate, be equipped with bellying and ear on the bottom plate, driving motor and speed governing are dialled the case and are connected in on the bellying, the ear is located bellying is along the ascending relative both ends of length direction.
In some embodiments, the ear portion includes a first folding ear and a second folding ear, the first folding ear is disposed at an end of the bottom plate close to the protruding portion, the first folding ear extends along a length direction of the bottom plate, and a first mounting hole is disposed on the first folding ear; the lug is located in the second the bottom plate is kept away from the other end of bellying, the lug is located in the second the relative both sides of width direction are followed to the bottom plate the width direction of bottom plate extends, the second is rolled over and is equipped with the second mounting hole, wherein, first mounting hole with the second mounting hole through with the drain pan is mutually supported with the fastening connection the pressure regulating subassembly.
In some embodiments, the pressure regulating valve, the pressure stabilizing tank and the valve island are all connected in the airflow channel through hoses, wherein the pressure stabilizing tank and the valve island are all metal containers, the pressure stabilizing tank and the valve island are connected through air pipe joints and the hoses, and the air pipe joints are connected at the airflow inlet and the airflow outlet of the pressure stabilizing tank and the valve island.
In some embodiments, the air pipe connector includes a body portion and a connecting portion, the body portion is a rectangular parallelepiped, the connecting portion is hollow and connected to a surface of the body portion, a vent is provided on another surface of the body portion perpendicular to the surface, the vent is communicated with the connecting portion, a gasket is provided on a periphery of the vent, and the gasket is recessed into the surface of the body portion to form a step for accommodating the gasket.
The advantages that result from the additional features of the embodiments of the present application will be described in more detail in the detailed description that follows.
Drawings
Fig. 1 is a schematic perspective view of a dual-pressure air-tightness measuring instrument according to an embodiment of the present application.
Fig. 2 is a schematic perspective view of a dual-pressure air-tightness measuring instrument according to an embodiment of the present application.
Fig. 3 is a schematic perspective view of a dual-pressure air-tightness measuring instrument according to an embodiment of the present application.
Fig. 4 is an exploded view of a housing structure of a dual pressure gas tightness measuring instrument according to an embodiment of the present application.
Fig. 5 is a partial structural schematic diagram of a dual-pressure air-tightness measuring instrument according to an embodiment of the present application.
Fig. 6 is a partial structural schematic diagram of a dual-pressure air-tightness measuring instrument according to an embodiment of the present application.
Fig. 7 is a schematic view of a gas tube connection of a dual pressure gas tightness gauge according to an embodiment of the present application.
Reference numerals:
a dual-pressure air-tightness measuring instrument 100,
the air pressure buffer assembly 60 is arranged on the shell assembly 10, the oil-water separation assembly 30, the valve island assembly 40, the air pressure detection assembly 50, the air pressure buffer assembly 60, the pressure regulating assembly 70, the front shell 11, the bottom shell 12, the rear shell 13, the first shell 111, the second shell 112, the handle portion 14, the air outlet 110, the air inlet 120, the display touch screen 21, the controller 20, the windowing 130, the toughened film 210, the panel 113, the island body 41, the electromagnetic valve 42, the bottom plate 71, the protruding portion 711, the first tab 721, the first mounting hole 720, the second tab 722, the second mounting hole 730, the ear portion 712, the air pipe joint 80, the body portion 81, the connecting portion 82 and the gasket portion 810.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The dual-pressure air tightness measuring instrument 100 according to the embodiment of the present application will be described in detail below with reference to fig. 1 to 7, and the dual-pressure air tightness measuring instrument 100 is applied to air tightness detection of a new energy battery pack and air tightness detection of a battery cooling system.
The dual pressure airtightness measuring instrument 100 includes: the device comprises a shell assembly 10, a control assembly, an oil-water separation assembly 30, a valve island assembly 40, an air pressure detection assembly 50, an air pressure buffer assembly 60 and a pressure regulating assembly 70.
Referring to fig. 1 to 3, the housing assembly 10 includes a front housing 11, a bottom housing 12 and a rear housing 13, the front housing 11 and the rear housing 13 are respectively disposed at front and rear ends of the bottom housing 12, and the front housing 11 and the rear housing 13 extend obliquely from the bottom housing 12 to a direction close to each other, the front housing 11, the rear housing 13 and the bottom housing 12 form an outer housing with a narrow top and a wide bottom, a handle portion 14 is disposed at an upper end of the outer housing, a first housing 111 and a second housing 112 are disposed on the front housing 11, the first housing 111 and the second housing 112 are respectively connected to left and right sides of the front housing 11, and at least one of the first housing 111 and the second housing 112 is provided with an air inlet 120 and an air outlet 110. It should be noted that the terms of orientation such as inner, outer, front, back, up, down, left, right, etc. herein can be understood through the orientation shown in fig. 1 to 3, and are used herein only for convenience in understanding and describing the present invention, and are not to be construed as limiting the present invention. It is understood that the structure combined with the control assembly, the oil-water separation assembly 30, the valve island assembly 40, etc. belongs to the inside of the housing assembly 10, whereas the direction without the combined internal parts is the outside.
According to the dual-pressure air tightness measuring instrument 100 of the embodiment of the application, the control assembly, the oil-water separation assembly 30, the valve island assembly 40, the air pressure detection assembly 50, the air pressure buffer assembly 60 and the pressure regulating assembly 70 are all integrated in the shell assembly 10, and the shell is narrow at the top and wide at the bottom, so that the installation of various internal assemblies is facilitated, the space can be saved, the product structure is compact, and the whole weight is reduced. Set up handle portion 14 in the upper end of shell body, conveniently carry, can carry out the flexibility according to the position of test sample and trade, can effectively improve the convenience that new forms of energy battery detected.
Referring to fig. 1 and 4, the control assembly is connected to the inner side of the housing assembly 10, the control assembly includes a display touch screen 21 and a controller 20, the display touch screen 21 is disposed on the front housing 11, and the display touch screen 21 is connected to the controller 20. The controller 20 may be a single chip integrated with a processor, a memory, a communication module, and the like.
Referring to fig. 1, the oil-water separating assembly 30 is connected to at least one of the gas inlet 120 and the gas outlet 110. In some embodiments, the oil-water separator is disposed at both ends of the gas inlet 120 and the gas outlet 110, wherein the gas inlet 120 is connected to a gas source, and the gas outlet 110 is connected to a detection sample. Through oil water separator's setting, harmful impurity such as oil drop, steam in can effectively purifying the gas guarantees the clean cleanness of air current, thereby prevents and avoids having gaseous damage inside components in the air current passageway of impurity.
Referring to fig. 6, the valve island assembly 40 is connected to the inside of the housing assembly 10, and the valve island assembly 40 has air flow passages therein, which communicate with the air inlet 120 and the air outlet 110, respectively. The air pressure detecting member 50 is connected to the valve island member 40, and a detection terminal of the air pressure detecting member 50 is connected to the air flow passage of the valve island member 40. The air pressure buffer assembly 60 is connected between the valve island assembly 40 and the air inlet 120, and the air pressure buffer assembly 60 includes a surge tank, which is a container having an inner air suitable for buffering air. The pressure regulating assembly 70 is disposed inside the housing assembly 10 and connected to the air flow passage, the pressure regulating assembly 70 regulates the air pressure in the air flow passage to maintain a first air pressure or a second air pressure, the pressure regulating assembly 70 includes a driving motor, a pressure regulating valve and a speed regulating box, a transmission mechanism is disposed in the speed regulating box, the driving motor is connected to the transmission mechanism disposed in the speed regulating box and connected to the controller 20, and the transmission mechanism drives the pressure regulating valve to perform an air pressure regulating operation.
According to the double-pressure air tightness measuring instrument 100 of the embodiment of the application, the air pressure detection assembly 50 can be fixed by arranging the valve island assembly 40, a stable detection environment is formed for the air pressure detection assembly 50, the pressure regulating assembly 70 can stabilize the air pressure value of the air flow in the product at the first air pressure and the second air pressure according to the command of the controller 20, the detection of the air tightness of the sample under the requirement of the first air pressure and the air tightness of the sample under the requirement of the second air pressure are facilitated, and therefore the universality of the double-pressure air tightness measuring instrument 100 is stronger.
Optionally, the first air pressure is in the range of 10kpa or less and the second air pressure is in the range of 10kpa to 500 kpa. Under the general condition, the volume detection range that first atmospheric pressure is applicable to the determinand is 0L to 380L, can be used for detecting the gas tightness of new energy battery package, and the volume detection range that second atmospheric pressure is applicable to the determinand is 0L to 10L, can be used for testing the gas tightness of battery cooling systems such as water-cooling pipe. Compared with the prior art, the dual-pressure air tightness measuring instrument 100 provided by the embodiment of the application can adopt dual-pressure measurement, breaks through the invariance caused by single air pressure measurement, effectively improves the general compatibility of products, and is beneficial to popularization and application.
Referring to fig. 4, the front case 11 is provided with a window 130, the touch display screen is embedded in the window 130, the touch display screen is adhered with a tempered film 210, the front case 11 further includes a panel 113, the panel 113 covers the touch screen and fixes the touch screen on the panel 113, the panel 113 is provided with an opening, and the opening corresponds to the touch display screen. The touch display screen can interact with a customer, a test mode, a switch state and the like can be selected according to a customer instruction, and the touch display screen can also display a test state, fault information, test time and the like, so that the double-pressure air tightness measuring instrument 100 is more intelligent.
For convenience of operation, the panel 113 may further have keys connected to the controller 20. The switch signal is transmitted to the controller 20 through the key buttons to turn on and off the power for the instrument, thereby ensuring the normal operation of the instrument.
Referring to fig. 6, the valve island assembly 40 includes an island body 41 and a solenoid valve 42, the solenoid valve 42 is connected to the controller 20, an air flow path is provided in the island body 41, an air pressure detecting assembly 50 is connected to the air flow path, a fixing position is provided on the island body 41, and the air pressure detecting assembly 50 is fixedly connected to the fixing position through a fixing member.
The air pressure sensing assembly 50 includes a pressure sensor coupled to the controller 20. Wherein, pressure sensor includes inductive head and body, and in the inductive head stretched into the air current passageway of valve island, the body was fixed on the casing of valve island to avoid pressure sensor because of the sampling error that offset leads to.
Referring to fig. 5, the pressure regulating assembly 70 further includes a bottom plate 71, a protruding portion 711 and an ear portion 712 are disposed on the bottom plate 71, the driving motor and the speed regulating box are connected to the protruding portion 711, and the ear portion 712 is disposed at two opposite ends of the protruding portion 711 along the length direction. The base plate 71 is provided with the protruding portion 711, so that the structural strength of the base plate 71 can be increased, in addition, the protruding portion 711 can play a role in water resistance, ventilation and heat dissipation, and the base plate 71 is connected with the internal components and then connected with the shell component 10.
In the above embodiment, the ear portion 712 may include a first tab 721 and a second tab 722, the first tab 721 is disposed at one end of the bottom plate 71 close to the protrusion 711, the first tab 721 extends along the length direction of the bottom plate 71, the first tab 721 is provided with a first mounting hole 720, the second tab 722 is disposed at the other end of the bottom plate 71 away from the protrusion 711, the second tab 722 is disposed at two opposite sides of the bottom plate 71 along the width direction and extends along the width direction of the bottom plate 71, and the second tab 722 is provided with a second mounting hole 730. Coupling holes corresponding to the first and second mounting holes 720 and 730 are provided at corresponding positions of the case assembly 10, and the base plate 71 may be finally fixed to the case assembly 10 by means of fasteners. The first tab 721 and the second tab 722 are disposed to avoid interference with the mounting position of the housing assembly 10 and the internal components such as the driving motor and the speed-adjusting box, and can facilitate fixing of the bottom plate 71, save the board material, and reduce the weight.
Referring to fig. 1, the pressure regulating valve, the pressure stabilizing tank and the valve island are all connected into the airflow channel through hoses, wherein the pressure stabilizing tank and the valve island are all metal containers, the pressure stabilizing tank and the valve island are connected through a hose connector 80, and the hose connector 80 is connected to the airflow inlet and the airflow outlet of the pressure stabilizing tank and the valve island. The arrangement of the air pipe joint 80 is beneficial to ensuring the connection stability between the hose and the pressure regulating valve, the pressure stabilizing tank and the valve island.
Referring to fig. 7, the air tube connector 80 includes a body 81 and a connecting portion 82, the body 81 is a rectangular parallelepiped, the connecting portion 82 is hollow and connected to the surface of the body 81, the other surface of the body 81 perpendicular to the surface is provided with air vents, the air vents are communicated with each other at the connecting portion 82, a gasket portion 810 is provided at the periphery of the air vents, and the gasket portion 810 is recessed into the surface of the body 81 to form a step for accommodating the gasket. The gasket position 810 can effectively avoid gas leakage after being connected with the gasket, and pressure maintaining is facilitated. The gasket position 810 is arranged on the air pipe joint 80, so that the completeness of the gasket after the air pipe joint 80 is repeatedly plugged and pulled out of the air vent can be ensured, and the phenomena of deformation and abrasion of the gasket in the bent joint in the prior art are avoided.
In summary, according to the dual-pressure air tightness measuring instrument 100 of the embodiment of the present application, the control component, the oil-water separation component 30, the valve island component 40, the air pressure detection component 50, the air pressure buffer component 60, and the pressure regulation component 70 are all integrated in the housing component 10, and the housing is narrow at the top and wide at the bottom, which not only facilitates the installation of various internal components, but also saves space, makes the product structure compact, and reduces the overall weight. Set up handle portion 14 in the upper end of shell body, conveniently carry, can carry out the flexibility according to the position of test sample and trade, can effectively improve the convenience that new forms of energy battery detected. Can fix atmospheric pressure detection subassembly 50 through setting up valve island subassembly 40, for atmospheric pressure detection subassembly 50 forms stable detection environment, pressure regulating subassembly 70 can be stable at first atmospheric pressure and second atmospheric pressure with air current atmospheric pressure value in the product according to controller 20's order, does benefit to the gas tightness of sample under the gas tightness of sample and the second atmospheric pressure requirement under the first atmospheric pressure requirement of detection, consequently, this two pressure gas tightness measuring apparatu 100's commonality is stronger.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A dual pressure air-tightness meter, comprising: casing subassembly, control assembly, water oil separating subassembly, valve island subassembly, atmospheric pressure detection subassembly, atmospheric pressure buffering subassembly and pressure regulating subassembly, its characterized in that:
the shell assembly comprises a front shell, a bottom shell and a rear shell, the front shell and the rear shell are respectively arranged at the front end and the rear end of the bottom shell, the front shell and the rear shell extend obliquely from the bottom shell to the direction close to each other, the front shell, the rear shell and the bottom shell surround an outer shell with a narrow top and a wide bottom, a handle part is arranged at the upper end of the outer shell, a first shell and a second shell are arranged on the front shell, the first shell and the second shell are respectively connected to the left side and the right side of the front shell, and at least one of the first shell and the second shell is provided with an air inlet and an air outlet;
the control assembly is connected to the inner side of the shell assembly and comprises a display touch screen and a controller, the display touch screen is arranged on the front shell and is connected with the controller;
the oil-water separation component is connected to at least one of the air inlet and the air outlet;
the valve island assembly is connected to the inner side of the shell assembly, and an air flow channel is arranged in the valve island assembly and is respectively communicated with the air inlet and the air outlet;
the air pressure detection assembly is connected with the valve island assembly, and a detection terminal of the air pressure detection assembly is connected in an air flow channel of the valve island assembly;
the air pressure buffer assembly is connected between the valve island assembly and the air inlet and comprises a pressure stabilizing tank, and the pressure stabilizing tank is a container with internal air suitable for buffering air;
the pressure regulating subassembly is located casing unit's inboard is connected in the airflow channel, the adjustment of pressure regulating subassembly atmospheric pressure in the airflow channel keeps at first atmospheric pressure or second atmospheric pressure, the case is dialled including driving motor, air-vent valve and speed governing to the pressure regulating subassembly, the incasement is dialled to the speed governing is equipped with drive mechanism, driving motor connects the transmission mechanism that the incasement was dialled to the speed governing connects the controller, drive mechanism drives the air-vent valve carries out the atmospheric pressure adjustment action.
2. The dual pressure air-tightness gauge according to claim 1, wherein the first air pressure is in the range of 10kpa or less and the second air pressure is in the range of 10kpa to 500 kpa.
3. The dual-pressure air tightness measuring instrument according to claim 1, wherein the front shell is provided with a window, the touch display screen is embedded in the window, a toughened film is attached to the touch display screen, the front shell further comprises a panel, the panel covers the touch screen and fixes the touch screen on the panel, and an opening is formed in the panel and corresponds to the touch display screen.
4. The dual pressure air tightness measuring instrument according to claim 3, wherein a key is further provided on the panel, and the key is connected to the controller.
5. The dual pressure air tightness measuring instrument according to claim 1, wherein the valve island assembly comprises an island body and a solenoid valve, the solenoid valve is connected to the controller, the air flow passage is disposed in the island body, the air pressure detecting assembly is connected to the air flow passage, a fixing position is disposed on the island body, and the air pressure detecting assembly is fixedly connected to the fixing position through a fixing member.
6. The dual pressure air tightness gauge according to claim 1, wherein the air pressure detection assembly comprises a pressure sensor connected to the controller.
7. The dual-pressure air tightness measuring instrument according to claim 1, wherein the pressure regulating assembly further comprises a bottom plate, a boss and an ear are arranged on the bottom plate, the driving motor and the speed regulating box are connected to the boss, and the ear is arranged at two opposite ends of the boss along the length direction.
8. The dual pressure air-tightness gauge of claim 7, wherein the ear comprises:
the first folding lug is arranged at one end, close to the protruding part, of the bottom plate, extends along the length direction of the bottom plate, and is provided with a first mounting hole;
the ear is rolled over to the second, the ear is rolled over to the second is located the bottom plate is kept away from the other end of bellying, the ear is rolled over to the second is located the bottom plate is followed along width direction's relative both sides the width direction of bottom plate extends, the second is rolled over to be equipped with the second mounting hole on the ear, wherein, first mounting hole with the second mounting hole through with the drain pan is mutually supported with fastening connection the pressure regulating subassembly.
9. The dual pressure air tightness gauge according to claim 1, wherein the pressure regulating valve, the surge tank
And the valve island is connected into the airflow channel through a hose, wherein the pressure stabilizing tank and the valve island are both metal containers, the pressure stabilizing tank and the valve island are connected with the hose through air pipe joints, and the air pipe joints are connected with the pressure stabilizing tank, the airflow inlet and the airflow outlet of the valve island.
10. The dual pressure airtightness measuring instrument according to claim 9, wherein the air tube connector includes a body portion and a connecting portion, the body portion is a rectangular parallelepiped, the connecting portion is hollow and connected to a surface of the body portion, a vent hole is provided on another surface of the body portion perpendicular to the surface, the vent holes are communicated with each other at the connecting portion, a gasket portion is provided on an outer periphery of the vent hole, and the gasket portion is recessed into the surface of the body portion to form a step for accommodating the gasket.
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