Intelligent differential pressure gauge

Abstract

The embodiment of the utility model discloses an intelligent differential pressure gauge. The intelligent differential pressure gauge comprises a control circuit board; the differential pressure sensor is used for detecting a differential pressure value; the display screen is used for displaying detection related information of the intelligent differential pressure gauge; the key board comprises a plurality of functional key touch assemblies; the power supply is connected with the power supply end of the control circuit board and can be used for supplying power to the control circuit board; the shell is hollow to form a containing cavity, and the control circuit board, the differential pressure sensor, the display screen and the key board are placed in the containing cavity; the shell comprises at least one opening, and the display screen is exposed to the outside of the shell through the at least one opening. Therefore, the functionality of the intelligent differential pressure gauge can be improved, and user operation is also facilitated.

Description

Technical Field

[0001] The present disclosure relates to the field of measurement technologies, and in particular, to an intelligent differential pressure gauge. Background Art

[0002] Measurement is an important part of industrial automation. According to different application environments, there are various liquid level measurement and control products with different measurement principles for industrial automation process control. Representative products include, for example, radar liquid level gauges, static pressure liquid level gauges, float liquid level gauges, etc. Due to their different working principles, manufacturing processes, and structural characteristics, they are further subdivided into several varieties and series and are used in different working conditions.

[0003] However, existing liquid level gauges have few functions, are inconvenient to use, and it is not easy to read data. Summary of the Utility Model

[0004] This part of the disclosure is provided to introduce concepts in a brief form, which will be described in detail in the following detailed implementation part. This part of the disclosure is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0005] Embodiments of the present disclosure provide an intelligent differential pressure gauge, which can improve the usage experience of the intelligent differential pressure gauge, improve its functionality, and facilitate user operation.

[0006] In a first aspect, an embodiment of the present application provides an intelligent differential pressure gauge, including: a control circuit board, including: a differential pressure signal terminal, a screen signal terminal, a key signal terminal, and a power supply terminal, wherein the key signal terminal includes a plurality of functional connection ports; a differential pressure sensor for detecting a differential pressure value and connected to the control circuit board through the differential pressure signal terminal; a display screen for displaying detection-related information of the intelligent differential pressure gauge and connected to the differential pressure signal terminal of the control circuit board; a key board including a plurality of functional key touch components, and each functional key touch component corresponds to a functional connection port on the control circuit board; a power supply connected to the power supply terminal of the control circuit board and used to supply power to the control circuit board; connected to the differential pressure sensor and used to supply power to the differential pressure sensor; a housing, the housing is hollow to form a receiving cavity, and the control circuit board, the differential pressure sensor, the display screen, and the key board are placed in the receiving cavity; the housing includes at least one opening, and the display screen is exposed to the outside of the housing through the at least one opening.

[0007] In an alternative embodiment of the first aspect, the housing includes: a bottom plate, an enclosing frame, and a cover plate; the bottom plate is detachably connected to the enclosing frame, the cover plate is detachably connected to the enclosing frame, and the bottom plate and the cover plate are respectively connected to two sides of the enclosing frame; the power supply includes a battery, and the battery is fixedly arranged on the bottom plate and inside the accommodating cavity; the enclosing frame includes at least one first through hole; the cover plate includes a first card slot and a second card slot, the first card slot is used for clamping the display screen, and the second card slot is used for clamping the keypad.

[0008] In an alternative embodiment of the first aspect, a first fixing bracket and a second fixing bracket are arranged on a first surface of the bottom plate, and the first fixing bracket and the second fixing bracket are symmetrically arranged; the first fixing bracket includes a fastening portion and a supporting portion, the fastening portion is used for combining with a connecting member, and the supporting portion is used for supporting the battery; the second fixing bracket includes a fastening portion and a supporting portion corresponding to the first fixing bracket.

[0009] In an alternative embodiment of the first aspect, the intelligent differential pressure gauge further includes an alarm indicator light; the at least one first through hole includes one or more of the following: an air inlet hole for air intake, a pressure relief hole for installing a pressure relief valve, an antenna hole for fixing a transmission antenna, and an indicator light hole for fixing an alarm device.

[0010] In an alternative embodiment of the first aspect, the cover plate includes a bearing back plate and a cover plate; the bearing back plate is provided with a first card slot and a second card slot; the first card slot is located above the second card slot; after the display screen is clamped with the first card slot, the display screen is at the center of the bearing back plate, and the area of the first card slot accounts for one-third to one-half of the area of the first surface of the bearing back plate; the area of the second card slot accounts for one-fifth to one-fourth of the area of the first surface of the bearing back plate; the interval between the second card slot and the outer surface of the cover plate is equal to the thickness of the keypad, so that after the keypad is clamped with the second card slot, the surface of the keypad is flush with the outer side surface of the cover plate.

[0011] In an alternative embodiment of the first aspect, the inner surface of the cover plate abuts against the frame of the enclosing frame, and the connection manner between the cover plate and the enclosing frame includes any one of the following: the cover plate and the enclosing frame are connected by bolts; the first side of the cover plate is connected to the enclosing frame through a hinge, and a buckle cooperating with the enclosing frame is arranged on the second side of the cover plate; a fixing mechanism is arranged on the inner surface of the cover plate, and the control circuit board is fixed on the inner surface of the cover plate through the fixing mechanism; wherein, the fixing mechanism includes at least one or more of the following: fixing buckles, bolts.

[0012] In an alternative embodiment of the first aspect, a fixing device is provided in the accommodation cavity formed in the hollow of the housing, and the fixing device is used to place the differential pressure sensor; the fixing device is provided with a plurality of second through holes, wherein the plurality of second through holes at least include: an air inlet hole for admitting air, and a circuit hole for transmitting a detection signal to the control circuit board; the plurality of second through holes are provided on the first surface and the second surface of the fixing device, the second surface abuts against the first surface of the surrounding frame, a first through hole is provided on the first surface of the surrounding frame, and the first through hole provided on the first surface of the surrounding frame is adapted to the second through hole provided on the first surface of the fixing device, and the first surface of the fixing device is adjacent to the second surface of the fixing device.

[0013] In an alternative embodiment of the first aspect, a pressure sensor is further included; the pressure sensor is electrically connected to the pressure signal terminal of the control circuit board; the pressure sensor is mechanically connected to the housing through a connecting member.

[0014] In an alternative embodiment of the first aspect, the control circuit board further includes: a 4-20MA signal terminal, a 485 bus terminal, an Internet of Things remote transmission module, an output IO terminal, and an input IO terminal; the 4-20MA signal terminal is used to transmit a 4-20MA signal through a 4-20MA connector; the 485 bus terminal transmits a 485 signal through a 485 connector; the EC200U remote transmission module is used to communicate with a remote terminal; the output IO terminal outputs a switch signal to a key switch; the output IO terminal outputs an alarm signal to an alarm indicator; the input IO terminal receives an input switch signal.

[0015] In an alternative embodiment of the first aspect, the power supply is an external power supply, a 7.4V internal battery pack, and / or a combination of an external power supply and a 3.7V internal battery pack; the external power supply is a solar panel or a 24V power adapter.

[0016] On the cover plate of an intelligent differential pressure gauge provided by an embodiment of the present application, a first card slot 201 and a second card slot are provided. Through the first card slot, the display screen can be easily snapped in, and through the second card slot, the key board can be easily snapped in. Among them, the display screen can be used to display the detection information and / or the status information of the intelligent differential pressure gauge. Thus, through the display screen, it is convenient for users to directly view the detection information and / or the status information of the intelligent differential pressure gauge. At the same time, since the display screen is located at the center of the cover plate after being snapped onto the cover plate, it can ensure that the center of the user's line of sight is exactly on the display screen when using the intelligent differential pressure gauge, further improving the user experience. In addition, the key board also includes a plurality of functional key touch components, which correspond to the functional connection ports of the control circuit board of the intelligent differential pressure gauge. Therefore, users can set or configure the functions of the intelligent differential pressure gauge by touching the functional key touch components. It can be seen that this design can improve the user experience of the intelligent differential pressure gauge, enhance its functionality, and also facilitate user operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In combination with the accompanying drawings and with reference to the following specific embodiments, the above and other features, advantages, and aspects of the various embodiments of the present disclosure will become more apparent. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the original components and elements are not necessarily drawn to scale.

[0018] Figure 1 is a schematic diagram of the first intelligent differential pressure gauge provided by an embodiment of the present application;

[0019] Figure 2 、 Figure 3 and Figure 4 show schematic diagrams related to the bottom plate.

[0020] Figure 5 、 Figure 6 and Figure 7 show schematic diagrams related to the cover plate.

[0021] Figure 8 and Figure 9 show schematic diagrams related to the surrounding frame.

[0022] Figure 10 shows a schematic diagram of the fixing device.

[0023] Figure 11 and Figure 12 show schematic diagrams related to the pressure sensor.

[0024] Figure 13 shows a schematic diagram related to the control circuit of the control circuit board. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not used to limit the protection scope of the present disclosure.

[0026] It should be understood that the various steps recited in the method embodiments of the present disclosure can be executed in a different order and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present disclosure is not limited in this regard.

[0027] As used herein, the term "including" and its variations are open-ended, that is, "including but not limited to". The term "based on" is "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0028] It should be noted that the concepts such as "first", "second", etc. mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependent relationships.

[0029] It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly stated in the context, it should be understood as "one or more".

[0030] Liquid level measurement is an important part of industrial automation. According to different application environments, there are various liquid level measurement and control products with different measurement principles for industrial automation process control. Representative products include: radar liquid level gauges, hydrostatic liquid level gauges, float liquid level gauges, intelligent differential pressure gauges, etc. Due to their different working principles, manufacturing processes and structural characteristics, they are further subdivided into several varieties and series and are used in different working conditions.

[0031] However, existing liquid level gauges have few functions and are relatively inconvenient to use, and it is not easy to read data.

[0032] In view of the above problems, the embodiments of the present application provide the following embodiments to solve them.

[0033] Please refer to Figure 1 The embodiments of the present application provide an overall view of an intelligent differential pressure gauge.

[0034] An intelligent differential pressure gauge according to an embodiment may include: a control circuit board, a differential pressure sensor, a display screen, a keypad, a power supply, and a housing.

[0035] The control circuit board includes: a differential pressure signal terminal, a screen signal terminal, a keypad signal terminal, and a power supply terminal. Among them, the keypad signal terminal includes a plurality of functional connection ports. As an example, please refer to Figure 13 , Figure 13 which shows a schematic diagram of the control circuit of the control circuit board.

[0036] The differential pressure sensor is used to detect the differential pressure value and is connected to the control circuit board through the differential pressure signal terminal.

[0037] The display screen is used to display the detection-related information of the intelligent differential pressure gauge and is connected to the differential pressure signal terminal of the control circuit board. Optionally, the detection-related information of the intelligent differential pressure gauge may include the detection information of the intelligent differential pressure gauge and / or the status information of the intelligent differential pressure gauge. The status information of the differential pressure gauge at least includes basic information such as time and date. By displaying the detection information and / or the status information of the differential pressure gauge, the differential pressure gauge can be made more intelligent, which enables the user to more conveniently understand the detection situation and status of the differential pressure gauge.

[0038] The above display screen may be, but is not limited to, an LED (Light-Emitting Diode) display screen, an LCD (Liquid Crystal Display) display screen.

[0039] The keypad includes a plurality of functional key touch components, and each functional key touch component corresponds to a functional connection port on the control circuit board. That is, each functional key touch component is used to implement a certain key function.

[0040] The power supply is connected to the power supply terminal of the control circuit board and can be used to supply power to the control circuit board; it is connected to the differential pressure sensor and is used to supply power to the differential pressure sensor.

[0041] Here, the power supply can supply power to the differential pressure sensor. Optionally, the power supply of the control circuit board can be completed by the above power supply or by other power supply methods (such as an external power supply).

[0042] The housing has a hollow interior to form a receiving cavity, and the control circuit board, the differential pressure sensor, the display screen, and the keypad are placed in the receiving cavity; the housing includes at least one opening, and the display screen is exposed to the outside of the housing through the at least one opening.

[0043] In some implementation manners, the bottom plate, the surrounding frame, and the cover plate can all be made of high-strength materials such as metal or alloy, so that the durability of the entire housing can be improved.

[0044] In some embodiments, the housing further includes at least three fixing bolts, and any one of the fixing bolts connects the back plate, the surrounding frame, and the cover plate.

[0045] As an example, by setting the fixing bolts, the bottom plate, the surrounding frame, and the cover plate can be integrally connected, so that the housing formed by the back plate, the surrounding frame, and the cover plate can be more stable.

[0046] As an example, through holes are provided at the edges of the bottom plate, the surrounding frame, and the cover plate, and the bolts can pass through the provided through holes to integrally connect the bottom plate, the surrounding frame, and the cover plate.

[0047] As an example, please refer to Figure 1 , Figure 1 which shows a front view of the intelligent differential pressure gauge. When the display screen 40 is installed, the display screen 40 covers the center of the cover plate 30.

[0048] As an example, Figure 2 , Figure 3 and Figure 4 show related diagrams of the bottom plate 10.

[0049] As an example, Figure 5 , Figure 6 and Figure 7 show related diagrams of the cover plate 30.

[0050] As an example, Figure 8 and Figure 9 show related diagrams of the surrounding frame 20.

[0051] As an example, Figure 10 shows a diagram of the fixing device 80.

[0052] As an example, Figure 11 and Figure 12 show related diagrams of the pressure sensor 90.

[0053] As an example, Figure 13 shows a diagram related to the control circuit of the control circuit board.

[0054] ​​The intelligent differential pressure gauge provided in this embodiment can provide relatively complete functions and enrich the applicable scenarios of the intelligent differential pressure gauge. The display screen can be used to display the detection information of the intelligent differential pressure gauge and / or the status information of the intelligent differential pressure gauge. Furthermore, through the display screen, it is convenient for users to directly view the detection information of the intelligent differential pressure gauge and / or the status information of the intelligent differential pressure gauge; the keypad also includes multiple functional key touch components, and they correspond to the functional connection ports of the intelligent differential pressure gauge control circuit board. Furthermore, users can realize the setting or adjustment of the functions of the intelligent differential pressure gauge by touching the functional key touch components. It can be seen that this design can improve the user experience of the intelligent differential pressure gauge, improve its functionality, and also facilitate user operation.

[0055] In some embodiments, the housing includes: a bottom plate 10, an enclosing frame 20, and a cover plate 30.

[0056] The bottom plate 10 is detachably connected to the enclosing frame 20, the cover plate 30 is detachably connected to the enclosing frame 20, and the bottom plate 10 and the cover plate 30 are respectively connected to both sides of the enclosing frame 20; the power supply includes a battery 60, and the battery 60 is fixedly arranged on the bottom plate 10 and is located inside the accommodating cavity; the enclosing frame includes at least one first through hole; the cover plate includes a first card slot and a second card slot. The first card slot is used for clamping the display 40, and the second card slot is used for clamping the keypad 50.

[0057] As an example, please refer to Figure 2 , Figure 2 which shows a schematic diagram of installing the battery 60 on the bottom plate 10. Figure 3 shows an oblique view of the battery, Figure 4 shows the relevant components of the assembly of the bottom plate and the battery.

[0058] A first card slot 201 and a second card slot are provided on the cover plate of the intelligent differential pressure gauge provided in the embodiment of the present application. Through the first card slot, the display screen can be clamped, and through the second card slot, the keypad can be clamped. Among them, the display screen can be used to display the detection information of the intelligent differential pressure gauge and / or the status information of the intelligent differential pressure gauge. Furthermore, through the display screen, it is convenient for users to directly view the detection information of the intelligent differential pressure gauge and / or the status information of the intelligent differential pressure gauge. At the same time, since the display screen is located at the center of the cover plate after being clamped on the cover plate, it can make the center of the user's line of sight just located in the display screen when using the intelligent differential pressure gauge, which further improves the user experience. In addition, the keypad also includes multiple functional key touch components, and they correspond to the functional connection ports of the intelligent differential pressure gauge control circuit board. Furthermore, users can realize the setting or adjustment of the functions of the intelligent differential pressure gauge by touching the functional key touch components. It can be seen that this design can improve the user experience of the intelligent differential pressure gauge, improve its functionality, and also facilitate user operation.

[0059] In some embodiments, by way of example, please refer to Figure 2 , a first fixing bracket and a second fixing bracket are provided on the first surface of the bottom plate 10, and the first fixing bracket and the second fixing bracket are symmetrically arranged; the first fixing bracket includes a fastening portion and a supporting portion, the fastening portion is used for combining with a connecting member, and the supporting portion is used for supporting the battery; the second fixing bracket includes a fastening portion and a supporting portion corresponding to the first fixing bracket.

[0060] By way of example, the first fixing bracket and the second fixing bracket can be symmetric, and moreover, the sizes of the first fixing bracket and the second fixing bracket can be the same, so that the manufacturing costs of the first fixing bracket and the second fixing bracket can be reduced.

[0061] By way of example, the shape of the supporting portion can be adapted to the shape of the battery, so that the support for the battery can be better realized. Optionally, the above battery can be a storage battery. Optionally, the above battery can be a lithium thionyl chloride battery.

[0062] In some embodiments, the first fixing bracket includes two fastening portions, the two fastening portions are spaced apart, and the supporting portion is arranged between the two fastening portions.

[0063] By way of example, two fastening portions are provided at both ends of the supporting portion, so that the binding force of the connecting member on the battery acts on both ends of the supporting portion, and thus the fixing of the battery can be better realized.

[0064] At the same time, in this way, when fixing the battery, two connecting members are used, making the fixing of the battery more firm.

[0065] In some embodiments, the shape of the fastening portion is U-shaped, and the opening of the U-shaped fastening portion obliquely faces the first surface of the fixed back plate.

[0066] And by designing the shape of the fastening portion in this way, it is convenient to combine the connecting member with the fastening portion to more conveniently realize the fixing of the battery.

[0067] In some embodiments, the control chip can also be arranged on the first surface of the fixing device.

[0068] By way of example, the first surface of the fixing device can be relatively parallel to the upper cover plate, so that the connection lines between the control chip, the display screen and the keys can be shorter.

[0069] In some embodiments, the battery is arranged on the second surface of the fixing device; the first surface of the fixing device is adjacent to the second surface of the fixing device.

[0070] As an example, the battery is arranged on the second side of the fixing device, so that the space required for the housing can be further saved, and at the same time, the stable fixation of the battery can be better achieved.

[0071] In some embodiments, the at least one first through hole includes one or more of the following: an air inlet hole for air intake, a pressure relief hole for installing a pressure relief valve, an antenna hole for fixing the transmission antenna 92, and an indicator light hole for fixing an alarm device.

[0072] From Figure 1 it can be seen that the differential pressure gauge control center may further include an alarm device 91 and a transmission antenna 92, so that the functions of the differential pressure gauge control center can be more perfect. For example, an alarm can be made using the alarm device when an abnormality is detected, and the abnormal information can be transmitted through the transmission antenna.

[0073] It should be noted that the antenna cooperating with the antenna hole can not only transmit abnormal information, but also remotely synchronize the conventional measurement results with the cloud platform, so that customers can remotely view the data through a mobile phone or a computer.

[0074] Here, the through holes on the surrounding frame 20 can be called first through holes. The description method of the first through holes is to distinguish them from the description of the through holes on other components, rather than a limitation on the type of through holes.

[0075] In some embodiments, please refer to Figure 5 、 Figure 6 and Figure 7 , the cover plate includes a bearing back plate 31 and a cover plate 32; the bearing back plate is provided with a first card slot and a second card slot; the first card slot is located above the second card slot; when the display screen is engaged with the first card slot, the display screen is at the center of the bearing back plate, and the area of the first card slot accounts for one-third to one-half of the area of the first surface of the bearing back plate; the area of the second card slot accounts for one-fifth to one-fourth of the area of the first surface of the bearing back plate; the interval between the second card slot and the outer side surface of the cover plate is equal to the thickness of the key board, so that after the key board is engaged with the second card slot, the surface of the key board is flush with the outer side surface of the cover plate.

[0076] In one embodiment, when the display screen is engaged with the first card slot, the interval between the surface of the display screen and the first surface of the cover plate body is 3 millimeters.

[0077] After the display screen is engaged with the first card slot, the interval between the surface of the display screen and the first surface (i.e., the outer surface) of the cover plate is 6 millimeters. That is, the first card slot 201 is equivalent to sinking the display screen by 6 millimeters. The part of the first card slot where the display screen is set is sunk by 6 millimeters, so that the interval between the display screen and the first surface of the cover plate is finally 6 millimeters. In this way, on the one hand, it can protect the display screen, that is, play a protective role for the display screen, and on the other hand, it also plays a role in aesthetics.

[0078] Optionally, in an embodiment, the length of the first card slot is 105 millimeters and the width is 61 millimeters. By setting the size of the first card slot as above, it is possible to facilitate the engagement of a larger-sized display screen, and thus facilitate the display of the detection information and / or the status information of the intelligent differential pressure gauge.

[0079] In other words, through research, it is found that a length of 105 millimeters and a width of 61 millimeters are more suitable for the use scenario of the intelligent differential pressure gauge.

[0080] In an embodiment, the distances from the first card slot to the left and right sides of the cover plate are both 9 millimeters, and the distance from the first card slot to the upper side of the cover plate is 31 millimeters.

[0081] Optionally, in the embodiment of the present application, the area of the first card slot accounts for one-third to one-half of the area of the first surface of the cover plate.

[0082] In other words, the ratio of the area of the first card slot to the area of the first surface of the cover plate body is between one-third and one-half.

[0083] Of course, in some embodiments, the ratio of the area of the first card slot to the area of the first surface of the cover plate body may also be equal to one-third or equal to one-half. In this regard, the present application does not make a limitation.

[0084] Correspondingly, the area of the second card slot accounts for one-fifth to one-fourth of the area of the first surface of the cover plate body.

[0085] The first card slot is located above the second card slot; the interval between the first card slot and the second card slot is between 5 millimeters and 10 millimeters. In other words, through the above, the design of the display area and the operation area is made more reasonable, facilitating the user's viewing and operation process, and improving the user experience.

[0086] The cover plate includes a second card slot. The second card slot is used to engage the key board; each function key touch component on the key board is correspondingly connected to a function connection port on the control circuit board; the control circuit board is the control board of the intelligent differential pressure gauge.

[0087] Optionally, the gap between the second card slot and the outer surface of the cover plate of the cover is equal to the thickness of the function key board, so that after the key board is engaged with the second card slot, the surface of the key board is flush with the outer surface of the cover plate.

[0088] By providing a second card slot on the carrier back plate of the cover plate, the key board can be engaged with it. The function key board includes a plurality of function key touch components, and they correspond to the function connection ports of the intelligent differential pressure gauge. Thus, users can set or configure the functions of the intelligent differential pressure gauge by touching the function key touch components. In the embodiment of the present application, the gap between the second card slot and the first surface of the cover plate is equal to the thickness of the function key board, so that after the key board is engaged with the second card slot, the surface of the function key board is flush with the first surface (i.e., the outer surface) of the cover plate. In this way, it is convenient for users to operate and is more aesthetically pleasing, making the entire cover plate have an integrated effect. In summary, this design can improve the user experience of the intelligent differential pressure gauge, enhance its functionality, and facilitate user operation.

[0089] Optionally, the cover plate is provided with at least two openings, so that the display information (i.e., the display screen shows) and the adjustment operation (i.e., the key board operation) can be carried out on the same surface, which is convenient for users to operate and observe.

[0090] Please refer to Figure 6 , optionally, the function key touch components include a selection component, a confirmation component, and a target component.

[0091] Among them, the target component has both a setting function and a return function. The selection component includes an up selection component, a down selection component, a left selection component, and a right selection component.

[0092] Optionally, the key control signal terminals include a confirmation function pin, an up selection function pin, a down selection function pin, a left selection function pin, a right selection function pin, and a return function pin.

[0093] The control key board includes: a confirmation key, an up selection key, a down selection key, a left selection key, a right selection key, and a return key.

[0094] The confirmation key is connected to the confirmation function pin; the up selection key is connected to the up selection function pin; the down selection key is connected to the down selection function pin; the left selection key is connected to the left selection function pin; the right selection key is connected to the right selection function pin; the return key is connected to the return function pin.

[0095] That is, the embodiments of the present application provide a function control method for a differential pressure gauge. Specifically, by determining the keys, the up selection key, the down selection key, the left selection key, the right selection key, and the return key and connecting them to the corresponding pins on the main board of the differential pressure gauge, the differential pressure gauge can have a correction operation function, improve the interaction with the user, and thus improve the user experience.

[0096] In some embodiments, the inner surface of the cover plate abuts against the frame of the surrounding frame. The connection manner between the cover plate and the surrounding frame includes any of the following: the cover plate is connected to the surrounding frame by bolts; the first side of the cover plate is connected to the surrounding frame by a hinge, and a buckle cooperating with the surrounding frame is provided on the second side of the cover plate.

[0097] A fixing mechanism is provided on the surface of the cover plate, and the control circuit board is fixed on the inner surface of the cover plate through the fixing mechanism; wherein, the fixing mechanism includes at least one or more of the following: fixing buckles, bolts. The control circuit board is arranged on the inner surface of the cover plate.

[0098] As an example, the control circuit board is arranged on the inner surface of the cover plate (i.e., one side in the accommodation cavity). In this way, the connection lines between the display screen and the keys and the control circuit can be shortened, thereby avoiding connection failures caused during the connection process. At the same time, the connection lines required in the manufacturing process can also be saved.

[0099] In some embodiments, specifically, the control circuit board can be arranged on the inner surface of the bearing back plate. The bearing back plate of the cover plate can be provided with a fastening member, and the control circuit board can be fixed to the back of the cover plate through the fastening member.

[0100] That is, this method of fixing the control chip to the back of the cover plate by buckling can facilitate the disassembly of the control circuit board, thereby better overhauling the control chip.

[0101] It should be understood that arranging the control circuit board on the back of the cover plate can also prevent the control circuit board from being squeezed, thereby prolonging the service life of the control chip. The specific number and specific buckling method of the fastening members can both be limited according to the actual situation.

[0102] In some embodiments, a fixing device is disposed in the accommodation cavity formed in the hollow of the housing, and the fixing device is used to place a differential pressure sensor; the fixing device is provided with a plurality of second through holes, wherein the plurality of second through holes at least include: an air inlet hole for admitting air, and a circuit hole for transmitting a detection signal to a control circuit board; the plurality of second through holes are disposed on a first surface and a second surface of the fixing device, the second surface abuts against a first surface of the surrounding frame, a first through hole is formed in the first surface of the surrounding frame, and the first through hole formed in the first surface of the surrounding frame is adapted to the second through hole formed in the first surface of the fixing device, and the first surface of the fixing device is adjacent to the second surface of the fixing device.

[0103] In some embodiments, two protection spaces can be formed. One protection space (the first protection space) is an accommodation cavity formed by a bottom plate, a surrounding frame, and a cover plate, and the other protection space is a protection space (the second protection space) inside the fixing device; the battery and the control circuit board are disposed between the first protection space and the second protection space, and the differential pressure sensor is disposed inside the second protection space.

[0104] It should be understood that through holes adapted to the plurality of through holes formed in the fixing device are formed in the housing, so as to facilitate air intake and pressure relief.

[0105] In some embodiments, the air inlet hole for admitting air and the pressure relief hole for installing a pressure relief valve can both be formed in the first side frame of the surrounding frame, and the plurality of through holes formed in the fixing device can correspond to the through holes in the first side frame. In this way, the space occupied by the fixing device can be saved to a certain extent.

[0106] As an example, since the fixing device is provided and the differential pressure sensor is disposed inside the fixing device while the battery is disposed outside the fixing device, in this way, the separation of the differential pressure sensor and the battery is achieved, so that the detection error of the differential pressure sensor caused by the heat generated during the use of the battery can be avoided, and moreover, the service life of the differential pressure sensor affected by the heat generated during the use of the battery can be avoided.

[0107] At the same time, since the volume of the differential pressure sensor is generally much smaller than that of the battery, and in this way, the volume of the fixing device can also be reduced. Moreover, disposing the battery outside the fixing device can also enable the battery to dissipate heat better, thereby avoiding excessive heat of the battery.

[0108] As an example, the fixing device is detachably arranged in the accommodating cavity, the enclosing frame and the cover plate can be detachably connected, and the bottom plate and the enclosing frame can also be detachably connected, so that the shell can be assembled on site at the actual application site to form a shell, so that the shell can be easily transported. Of course, the fixing device is detachably arranged in the accommodating cavity, and the differential pressure sensor can be arranged in the fixing device. In this way, during transportation, the fixing device can be removed from the accommodating cavity, and the fixing device can be used to perform a separate protection operation on the differential pressure sensor, thereby avoiding damage to the differential pressure sensor as much as possible.

[0109] Furthermore, since the fixing device is detachably connected to the accommodating cavity, the surrounding frame and the cover plate can also be detachably connected, thus making it easy to inspect and replace the differential pressure sensor disposed in the fixing device.

[0110] In the present disclosure, by setting the differential pressure sensor in a fixing device, which is also set in a shell, the differential pressure sensor is provided with double protection, which not only protects the differential pressure sensor from being affected by the external environment, but also reduces the impact of battery heating on the differential pressure sensor, thereby making the working environment of the differential pressure sensor better, and thus enabling better and more accurate liquid pressure detection.

[0111] In some embodiments, the above-mentioned intelligent differential pressure gauge also includes a pressure sensor; the pressure sensor 90 is electrically connected to the pressure signal terminal of the control circuit board; and the pressure sensor is mechanically connected to the shell through a connecting component 93.

[0112] For ease of understanding, you can combine Figure 11 and Figure 12 To explain, Figure 11 and Figure 12 It can be seen that the pressure sensor 90 can be a mechanical pressure sensor, and can be a national standard universal differential pressure gauge. The setting of the mechanical pressure gauge can improve the stability of the differential pressure gauge. For example, when the differential pressure sensor set inside the fixture fails, the mechanical pressure gauge can also be used to determine the pressure.

[0113] It should be understood that the connection member 93 connecting the housing and the mechanical pressure gauge can be reasonably arranged, such as Figure 11 and Figure 12 As shown, the present disclosure lists a possible connection mechanism, one end of which can be connected to the mechanical pressure gauge, and the other end of which can be connected to the housing or the fixing device, and the connection structure can be fixed together with the mechanical pressure gauge and the housing by bolt connection. That is, by providing the connection component 93, the housing and the mechanical pressure gauge can be connected together by later assembly.

[0114] It should be understood that the connecting component 93 can be fixed to the wall surface, so that the housing and the mechanical pressure gauge can be fixed to the wall surface together by using the connecting mechanism 93. This simplifies the fixing process for the intelligent differential pressure gauge.

[0115] In some embodiments, the control circuit board further includes: a 4-20MA signal terminal, a 485 bus terminal, an Internet of Things remote transmission module, an output IO terminal, and an input IO terminal;

[0116] The 4-20MA signal terminal is used to transmit a 4-20MA signal through a 4-20MA connector;

[0117] The 485 bus terminal transmits a 485 signal through a 485 connector;

[0118] The Internet of Things remote transmission module is used to communicate with a remote terminal;

[0119] The output IO terminal outputs a switch signal to the key switch;

[0120] The output IO terminal outputs an alarm signal to the alarm indicator light.

[0121] The external power supply is a solar panel or a 24V power adapter.

[0122] The input IO terminal receives an input switch signal. The 4-20MA connector 60 is connected to the differential pressure gauge main board 10 through the 4-20MA signal terminal 101.

[0123] The 485 connector 70 is connected to the differential pressure gauge main board 10 through the 485 bus terminal 105.

[0124] In summary, it can be seen that for the control circuit 100 of the differential pressure gauge provided in the embodiment of the present application, the differential pressure gauge main board 10 has a variety of signal terminals, enabling it to be connected with different functional components. For example, it is connected to the 4-20MA connector 60 through the 4-20MA signal terminal 101 and to the 485 connector 70 through the 485 bus terminal 105, enabling it to have a variety of signal transmission methods. The control key signal terminal 103 is connected to the control key board 20, enabling the differential pressure gauge to have a key touch function. In this way, the functionality of the differential pressure gauge configured with the control circuit 100 of the above differential pressure gauge can be improved, and the user experience can be enhanced.

[0125] Optionally, the differential pressure gauge main board further includes an Internet of Things remote transmission module. The Internet of Things remote transmission module can be one or more of the following: EC200U, EC200N, EC800E, EC800M.

[0126] The Internet of Things remote transmission module is used to communicate with a remote terminal. Among them, the remote terminal can be a device such as a personal computer, a mobile phone, a tablet, or an industrial terminal.

[0127] In some embodiments of the present disclosure, the input IO terminal receives an input switch signal.

[0128] In some embodiments of the present disclosure, the output IO terminal outputs an alarm signal to the alarm indicator light.

[0129] That is to say, the embodiment of the present application also provides a way of alarming. Specifically, when it is detected that there is also an abnormal fluctuation, the differential pressure gauge will trigger the alarm device to send out an alarm signal to notify the operator to perform corresponding processing, so as to avoid dangerous situations caused by sudden drops or rises in the liquid level.

[0130] In specific applications, such as the storage of dangerous goods: when storing dangerous goods such as liquefied gas, petroleum, and chemicals, the above-mentioned alarm device can avoid dangerous situations caused by sudden drops or rises in the liquid level.

[0131] For another example, in industrial production, during the production, processing, and storage of various materials, the above-mentioned alarm device can indirectly monitor the liquid level height in real time to avoid adverse consequences.

[0132] For another example, in the environmental protection industry, the above-mentioned alarm device can be applied to environmental protection industries such as waste treatment plants and water treatment plants to indirectly monitor the flow rate and liquid level of liquids, and detect abnormalities and give alarms in a timely manner.

[0133] Optionally, the main board of the differential pressure gauge further includes an input IO terminal; the control circuit of the differential pressure gauge further includes a key switch; the key switch is connected to the main board of the differential pressure gauge through the input IO terminal.

[0134] The above key switch can be a start or stop switch.

[0135] In some embodiments, the power supply is an external power supply, a 7.4V internal battery pack, and / or a combination of an external power supply and a 3.7V internal battery pack;

[0136] Optionally, the power supply is an external power supply, a 7.4V internal battery pack, and / or a combination of an external power supply and a 3.7V internal battery pack.

[0137] That is, the embodiment of the present application provides three battery power supply methods. The first can adopt the method of external power supply, the second can directly use the internally configured 7.4V internal battery pack for power supply, and the third can adopt the combination of an external power supply and a 3.7V internal battery pack.

[0138] In one embodiment, the control circuit of the differential pressure gauge can adopt only one of the above-mentioned power supply methods. In one embodiment, the control circuit of the differential pressure gauge can simultaneously include the above three power supply methods. By the above method, the control circuit with the differential pressure gauge can be applicable to different environments or scenarios, that is, different scenarios can adaptively select the corresponding power supply method.

[0139] Optionally, the external power supply is a solar panel or a 24V power adapter.

[0140] That is, the external power supply here can be a solar panel, and then directly use the solar panel for power supply, which can reasonably utilize resources. Of course, the external power supply here can also be a 24V power adapter, and then supply power by plugging in.

[0141] The above description is only the preferred embodiment of the present disclosure and the description of the applied technical principles. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosure concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present disclosure.

[0142] In addition, although the operations are depicted in a particular order, this should not be construed as requiring that the operations be performed in the particular order shown or in sequential order. In certain environments, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present disclosure. Certain features described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, the various features described in the context of a single embodiment may also be implemented separately or in any suitable sub-combination in multiple embodiments.

[0143] Although the subject matter has been described in language specific to structural features and / or methodological act logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are merely example forms of implementing the claims.

[0144] The above is only the embodiment of the present application and is not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An intelligent differential pressure gauge, characterized in that: include: A control circuit board, comprising: a differential pressure signal terminal, a screen signal terminal, a key signal terminal and a power supply terminal, wherein the key signal terminal comprises a plurality of functional connection ports; A differential pressure sensor, used for detecting a differential pressure value, and connected to the control circuit board via the differential pressure signal terminal; A display screen, used for displaying detection-related information of the intelligent differential pressure gauge, connected to the differential pressure signal terminal of the control circuit board; A keypad, comprising a plurality of function key touch components, each function key touch component corresponding to a function connection port on the control circuit board; A power supply, connected to the power supply terminal of the control circuit board, and used to supply power to the control circuit board; connected to the differential pressure sensor, and used to supply power to the differential pressure sensor; The shell is hollow to form a receiving cavity, in which the control circuit board, the differential pressure sensor, the display screen and the keypad are placed; the shell includes at least one opening, and the display screen is exposed to the outside of the shell through the at least one opening.

2. The intelligent differential pressure gauge according to claim 1, characterized in that: The housing comprises: a bottom plate, a surrounding frame and a cover plate; The bottom plate is detachably connected to the surrounding frame, the cover plate is detachably connected to the surrounding frame, and the bottom plate and the cover plate are respectively connected to two sides of the surrounding frame; The power source comprises a battery, and the battery is fixedly arranged on the bottom plate and located inside the accommodating cavity; The enclosing frame includes at least one first through hole; The cover plate includes a first card slot and a second card slot, wherein the first card slot is used to engage with the display screen, and the second card slot is used to engage with the keypad.

3. The intelligent differential pressure gauge according to claim 2, characterized in that: The first surface of the base plate is provided with a first fixing bracket and a second fixing bracket, and the first fixing bracket and the second fixing bracket are symmetrically arranged; the first fixing bracket includes a buckling portion and a supporting portion, the buckling portion is used to combine with the connecting piece, and the supporting portion is used to support the battery; the second fixing bracket includes a buckling portion and a supporting portion corresponding to the first fixing bracket.

4. The intelligent differential pressure gauge according to claim 2, characterized in that: The intelligent differential pressure gauge also includes an alarm indicator light; The at least one first through hole includes one or more of the following: an air intake hole for air intake, a pressure relief hole for installing a pressure relief valve, an antenna hole for fixing a transmission antenna, and an indicator light hole for fixing an alarm device.

5. The intelligent differential pressure gauge according to claim 2, characterized in that: The cover plate includes a bearing back plate and a cover plate; The bearing back plate is provided with a first card slot and a second card slot; The first card slot is located on the upper side of the second card slot; When the display screen is engaged with the first card slot, the display screen is located at the center of the bearing backplane, and the area of ​​the first card slot occupies between one third and one half of the area of ​​the first surface of the bearing backplane; The area of ​​the second card slot occupies one fifth to one quarter of the area of ​​the first surface of the carrying backplane; The interval between the second card slot and the outer surface of the cover plate is equal to the thickness of the key plate, so that after the key plate is engaged with the second card slot, the surface of the key plate is flush with the outer side surface of the cover plate.

6. The intelligent differential pressure gauge according to claim 5, characterized in that: The inner surface of the cover plate abuts against the frame of the surrounding frame, and the connection method between the cover plate and the surrounding frame includes any of the following: the cover plate and the surrounding frame are connected by bolts; the first side of the cover plate is connected to the surrounding frame by a hinge, and the second side of the cover plate is provided with a buckle that cooperates with the surrounding frame; A fixing mechanism is provided on the inner surface of the cover plate, and the control circuit board is fixed to the inner surface of the cover plate through the fixing mechanism; Wherein, the fixing mechanism includes at least one or more of the following: fixing buckles and bolts.

7. The intelligent differential pressure gauge according to claim 2, characterized in that: A fixing device is arranged in the accommodating cavity formed in the hollow of the shell, and the fixing device is used to place the differential pressure sensor; The fixing device is provided with a plurality of second through holes, wherein the plurality of second through holes at least include: an air intake hole for air intake, and a circuit hole for transmitting the detection signal to the control circuit board; A plurality of second through holes are arranged on the first surface and the second surface of the fixing device, the second surface abuts against the first surface of the enclosing frame, a first through hole is opened on the first surface of the enclosing frame, the first through hole opened on the first surface of the enclosing frame is adapted to the second through hole opened on the first surface of the fixing device, and the first surface of the fixing device is adjacent to the second surface of the fixing device.

8. The intelligent differential pressure gauge according to claim 2, characterized in that: Also included is a pressure sensor; The pressure sensor is electrically connected to the pressure signal terminal of the control circuit board; The pressure sensor is mechanically connected to the housing via a connecting component.

9. The intelligent differential pressure gauge according to claim 1, characterized in that: The control circuit board also includes: a 4-20MA signal terminal, a 485 bus terminal, an Internet of Things remote transmission module, an output IO terminal, and an input IO terminal; The 4-20MA signal terminal is used to transmit a 4-20MA signal through a 4-20MA connector; The 485 bus terminal transmits 485 signals via a 485 connector; The IoT remote transmission module is used to communicate with a remote terminal; The output IO terminal outputs a switch signal to the key switch; The output IO terminal outputs an alarm signal to the alarm indicator light; The input IO terminal receives an input switch signal.

10. The intelligent differential pressure gauge according to claim 1, characterized in that: The power source is an external power source, a 7.4V internal battery pack, and / or a combination of an external power source and a 3.7V internal battery pack; The external power source is a solar panel or a 24V power adapter.

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