digital pressure transmitter

Abstract

The application relates to the technical field of pressure transmitters, in particular to a digital display pressure transmitter. The digital display pressure transmitter comprises a pressure measurement assembly with a protective shell; a first annular groove and a positioning groove are arranged on the peripheral wall of the protective shell, and the positioning groove extends from the first annular groove to a first port; an elastic ring is arranged in the first annular groove; a digital display assembly comprises a mounting shell; the mounting shell is provided with a plug-in groove and a positioning block; the plug-in groove is sleeved on the outer side of the protective shell through the first port; the positioning block and the positioning groove are plug-in matched; when the positioning block moves along the positioning groove to the elastic ring, the positioning block compresses the elastic ring towards the protective shell until the positioning block passes the elastic ring, the elastic ring restores and blocks the positioning block from coming out. The connection of the digital display assembly and the pressure measurement assembly can be completed without additional tools in the whole assembly process, and the operation is simple.

Description

Technical Field

[0001] This application relates to the field of pressure transmitter technology, and more specifically, to a digital display pressure transmitter. Background Technology

[0002] A pressure transmitter is a device that converts the pressure signal of a detected gas or liquid into a standard electrical signal. Currently, in the industrial sector, pressure transmitters are widely used to detect and control the pressure of gases and liquids within equipment or pipelines.

[0003] However, traditional pressure transmitters typically only have the function of detecting and converting pressure signals, and their output standard electrical signals need to be displayed with the help of additional instruments or control systems. This requires operators to frequently switch between different devices to view pressure data on-site, making the operation process cumbersome, reducing work efficiency, and increasing the risk of data reading errors due to human error.

[0004] To facilitate readings, related technologies often integrate digital display components and pressure transmitters together. However, the connection and fixation between the digital display component and the core pressure measurement unit often rely on mechanical structures such as screws, which require tools or complex manual operations. The assembly process is neither simple nor quick during installation or disassembly. Utility Model Content

[0005] In view of this, this application aims to provide a digital display pressure transmitter that can solve the problem that the assembly of digital display pressure transmitters in related technologies is not simple or quick enough.

[0006] This application provides a digital pressure transmitter, comprising: a pressure measuring component having a protective housing; the protective housing having a first port; the outer peripheral wall of the protective housing having a first annular groove and a positioning groove, the positioning groove extending from the first annular groove to the first port; an elastic retaining ring disposed within the first annular groove; a digital display component including a mounting housing; the mounting housing having a insertion slot and a positioning block; the insertion slot being fitted onto the outer side of the protective housing via the first port; the positioning block being disposed on the peripheral wall of the insertion slot and engaging with the positioning groove; when the positioning block moves along the positioning groove to the elastic retaining ring, the positioning block compresses the elastic retaining ring towards the protective housing until the positioning block passes the elastic retaining ring, at which point the elastic retaining ring recovers and prevents the positioning block from dislodging.

[0007] In the above technical solution, operators can quickly read pressure values ​​through the digital display component to understand the pressure status of the target being measured. Furthermore, the mounting housing automatically locks in place after installation. The entire assembly process requires no additional tools; operators only need to apply force to connect the digital display component and the pressure measurement component, making operation simple.

[0008] In some technical solutions, the positioning block is optionally provided with a guide ramp.

[0009] In the above technical solution, the guide ramp provides a gradually transitioning contact surface for the positioning block and the elastic retaining ring. During assembly, when the positioning block approaches the elastic retaining ring, the guide ramp first contacts the elastic retaining ring, allowing the positioning block to press the elastic retaining ring towards the protective housing during movement, thereby preventing the positioning block from jamming during movement.

[0010] In some technical solutions, the insertion slot also includes a stepped surface. The stepped surface engages with the first port.

[0011] After the mounting housing is inserted to a certain depth, the stepped surface engages with the first port, preventing further insertion. This ensures that when the mounting housing is inserted to a certain depth, the stepped surface abuts against the first port, accurately determining the insertion depth of both the mounting housing and the protective housing, thus preventing over-insertion and damage to components.

[0012] In some technical solutions, the protective housing may optionally include a second port; wherein, the digital pressure transmitter further includes: a mounting base, which is rotatably connected to the protective housing via the second port; the mounting base is provided with a connecting joint, and the connecting joint is provided with a pressure detection hole.

[0013] In the above technical solution, the connecting joint is used to connect the device or pipeline under test, thereby achieving the fixed installation of the digital pressure transmitter. The medium to be measured enters the interior of the digital pressure transmitter through the pressure detection port, enabling the pressure measuring core to sense the pressure of the medium. The mounting base and the protective housing are rotatably connected, allowing the operator to rotate the protective housing after installation to ensure the display screen always faces the optimal viewing angle without needing to disassemble and readjust.

[0014] In some technical solutions, optionally, the outer peripheral wall of the mounting base is provided with a second annular groove, and the outer peripheral wall of the protective housing is provided with a first connecting hole; wherein, the digital display pressure transmitter further includes: a rotating block, movably disposed in the second annular groove and capable of moving along the second annular groove; the rotating block is provided with a second connecting hole; a connecting member, passing through the first connecting hole and the second connecting hole; and a limiting pin, at least partially located in the second annular groove, to stop the rotating block.

[0015] In the above technical solution, the rotation angle is limited by setting a limit pin. This ensures that the protective housing and the mounting base cannot rotate indefinitely, effectively protecting the cable from damage and ensuring the normal operation of the digital pressure transmitter. Furthermore, the rotating block is fitted into the second annular groove, allowing it to rotate but not move axially, thus preventing the protective housing and the mounting base from separating.

[0016] In some technical solutions, the mounting base is optionally provided with a mounting groove, which is connected to the pressure detection hole; wherein, the pressure measuring assembly also includes a pressure measuring core; the pressure measuring core is disposed in the mounting groove.

[0017] In the above technical solution, the pressure measuring core is fixed inside the mounting base, which can simultaneously ensure measurement accuracy and sealing durability.

[0018] In some technical solutions, optionally, a third sealing ring is provided between the pressure measuring core and the mounting groove; and / or a fourth sealing ring is provided between the peripheral wall surface and the protective housing.

[0019] This prevents the medium under test from entering the protective housing, thus preventing damage to the first circuit board and other electrical components.

[0020] In some technical solutions, the digital pressure transmitter may optionally include: a first sealing ring disposed between the protective housing and the mounting base, and located on one side of the second annular groove; and / or a second sealing ring disposed between the protective housing and the mounting base, and located on the other side of the second annular groove.

[0021] This improves the seal between the protective housing and the mounting base.

[0022] In some technical solutions, optionally, the outer peripheral wall of the protective housing is provided with an aviation connector, and the pressure measuring assembly also includes a first circuit board disposed inside the protective housing; the aviation connector and the first circuit board are electrically connected.

[0023] In the above technical solution, an aviation connector is used as the signal output port. The aviation connector can stably transmit the signal of the first circuit board to the external device. The connection through the aviation connector is stable and reliable, and is easy to maintain and replace.

[0024] In some technical solutions, the aviation connector may optionally include: a mounting base, one end of which is connected to a protective housing and the other end of which is provided with at least two potting grooves; a core having pins and disposed within the mounting base; and a potting layer filling the potting grooves.

[0025] In the above technical solution, by setting a potting layer, a stable and sealed overall structure can be formed between the glue core and the fixing seat to ensure stable output of external signals.

[0026] In some technical solutions, optionally, the top of the mounting housing is provided with an inclined viewing surface; the digital display assembly includes a display screen; the display screen and the inner side of the viewing surface are fitted together.

[0027] In the above technical solution, by setting an inclined viewing surface, the operator can easily observe the content of the display screen.

[0028] In some technical solutions, the digital display component may optionally include: a second circuit board disposed within the mounting housing; the second circuit board being connected to the display screen; and membrane buttons disposed on the outer side of the viewing surface and electrically connected to the second circuit board.

[0029] In the above technical solution, the membrane keypad and display screen form an integrated "observation-operation" design. Operators can adjust parameters simply by pressing the keypad, which improves operational efficiency.

[0030] Additional aspects and advantages of the technical solutions of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the main structure of a digital display pressure transmitter provided in some embodiments of this application; Figure 2 This is a side view of the digital pressure transmitter provided in some embodiments of this application; Figure 3 This is one of the exploded structural diagrams of a digital pressure transmitter provided in some embodiments of this application; Figure 4 This is one of the cross-sectional structural schematic diagrams of a digital display pressure transmitter provided in some embodiments of this application; Figure 5 This is a second cross-sectional structural schematic diagram of a digital pressure transmitter provided in some embodiments of this application; Figure 6 This is a schematic diagram of the structure of the protective housing of a digital pressure transmitter provided in some embodiments of this application; Figure 7 This is a schematic diagram of the mounting base of a digital pressure transmitter provided in some embodiments of this application; Figure 8 This is a cross-sectional structural schematic diagram of the mounting base of the digital display pressure transmitter provided in some embodiments of this application; Figure 9 This is the second exploded structural diagram of a digital pressure transmitter provided in some embodiments of this application; Figure 10 This is a front view structural schematic diagram of the aviation connector of the digital display pressure transmitter provided in some embodiments of this application; Figure 11 This is a cross-sectional structural schematic diagram of the aviation connector of the digital display pressure transmitter provided in some embodiments of this application.

[0032] Figure label: 100 Pressure measuring assembly; 110 Protective housing; 111 First port; 112 First annular groove; 113 Positioning groove; 114 Second port; 115 First connecting hole; 120 Pressure measuring core; 130 First circuit board; 140 First sealing ring; 150 Second sealing ring; 160 Aviation connector; 161 Mounting base; 162 Glue core; 163 Potting groove; 164 Pin; 165 Potting layer; 200 Digital display assembly; 210 Mounting housing; 211 Insertion slot; 2111 Stepped surface; 2 112 Peripheral wall surface; 212 Positioning block; 213 Guide slope; 214 Observation surface; 215 Connection port; 220 Second circuit board; 230 Display screen; 240 Fourth sealing ring; 250 Membrane key; 260 Pressure cap; 300 Elastic retaining ring; 400 Mounting base; 410 Connecting joint; 411 Pressure detection hole; 420 Mounting groove; 430 Third sealing ring; 440 Second annular groove; 450 Compression nut; 500 Rotating block; 510 Second connecting hole; 600 Connector; 700 Limit pin. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0034] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0035] The following is combined with Figures 1 to 11 This paper provides a detailed description of the digital pressure transmitter provided in this application through specific embodiments and application scenarios. Here, "circumferential direction" can be understood as... Figure 6 The c direction is shown in the diagram.

[0036] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 This application provides a digital pressure transmitter, the structure of which includes: a pressure measuring component 100, a digital display component 200, and an elastic retaining ring 300.

[0037] The pressure measuring assembly 100 includes a protective housing 110. The protective housing 110 has a first port 111, and its outer peripheral wall is provided with a first annular groove 112 and a positioning groove 113; the positioning groove 113 extends from the first annular groove 112 to the first port 111. An elastic retaining ring 300 is disposed in the first annular groove 112.

[0038] The digital display assembly 200 includes a mounting housing 210. The mounting housing 210 is provided with a insertion groove 211 and a positioning block 212. The insertion groove 211 is fitted onto the outside of the protective housing 110 via a first port 111. The positioning block 212 is disposed on the peripheral wall surface 2112 of the insertion groove 211 and engages with the positioning groove 113. When the positioning block 212 moves along the positioning groove 113 to the elastic retaining ring 300, the positioning block 212 compresses the elastic retaining ring 300 toward the protective housing 110 until the positioning block 212 passes over the elastic retaining ring 300. The elastic retaining ring 300 then recovers and prevents the positioning block 212 from falling out.

[0039] Reference Figures 1 to 6 The protective housing 110 protects the electronic components of the pressure measuring assembly 100 from damage caused by external environmental factors (such as dust and moisture), ensuring the normal and stable operation of the pressure measuring assembly 100. A first annular groove 112 is arranged circumferentially around the protective housing 110, i.e., surrounding the outer wall of the protective housing 110. A positioning groove 113 communicates with the first annular groove 112. The positioning groove 113 extends from the first annular groove 112 to the first port 111.

[0040] The elastic retaining ring 300 is disposed within the first annular groove 112. The elastic retaining ring 300 undergoes elastic deformation when compressed and automatically recovers after the external force is removed.

[0041] Reference Figures 3 to 5 The mounting housing 210 protects the electronic components of the digital display assembly 200 from damage caused by external environmental factors (such as dust and moisture), ensuring the normal and stable operation of the digital display assembly 200. The mounting housing 210 has a insertion slot 211, which is fitted onto the outside of the protective housing 110 through the first port 111, thus connecting the digital display assembly 200 and the pressure measuring assembly 100. A positioning block 212 is disposed on the peripheral wall 2112 of the insertion slot 211 and engages with the positioning groove 113 on the protective housing 110. When the mounting housing 210 and the protective housing 110 are inserted, the positioning block 212 is inserted into the positioning groove 113. Thus, after the mounting housing 210 and the protective housing 110 are installed in place, the constraint of the positioning block 212 and the positioning groove 113 prevents relative rotation between them.

[0042] The elastic retaining ring 300 is disposed within the first annular groove 112. During the process of fitting the insertion slot 211 of the mounting housing 210 into the protective housing 110, when the positioning block 212 moves along the positioning groove 113 to the position of the elastic retaining ring 300, the elastic retaining ring 300 will undergo elastic deformation after being compressed by the positioning block 212, and will contract towards the protective housing 110. When the mounting housing 210 is in place, the positioning block 212 has completely passed through the elastic retaining ring 300. At this time, the elastic retaining ring 300 will recover its deformation and protrude into the mounting housing 210, thereby engaging with one side of the positioning block 212 to prevent the mounting housing 210 from sliding out.

[0043] In the above embodiment, by setting the elastic retaining ring 300, when the mounting housing 210 is fitted onto the protective housing 110, the positioning block 212 moves along the positioning groove 113 to gradually compress the elastic retaining ring 300; after the mounting housing 210 is installed in place, the elastic retaining ring 300 automatically recovers its deformation, thereby engaging with the rear side of the positioning block 212 to prevent the mounting housing 210 from moving upward. The positioning block 212 is embedded in the positioning groove 113 to prevent the mounting housing 210 from rotating. In this way, the mounting housing 210 automatically locks after being installed in place. The entire assembly process requires no additional tools; the operator only needs to apply pushing force to complete the connection between the digital display component 200 and the pressure measuring component 100, making the operation simple.

[0044] It is understood that the number of positioning blocks 212 and positioning grooves 113 can be one or more, and they correspond one-to-one. When there are multiple positioning grooves 113, the multiple positioning grooves 113 are arranged at circumferential intervals along the first annular groove 112.

[0045] In some embodiments, a guide ramp 213 is provided on the front side of the positioning block 212. Guided by the guide ramp 213, the positioning block 212 can press the elastic retaining ring 300 towards the protective housing 110.

[0046] In the above embodiment, the guide ramp 213 provides a gradually transitioning contact surface for the positioning block 212 and the elastic retaining ring 300. During assembly, when the positioning block 212 approaches the elastic retaining ring 300, the guide ramp 213 first contacts the elastic retaining ring 300, allowing the positioning block 212 to press the elastic retaining ring 300 towards the protective housing 110 during movement, thereby preventing the positioning block 212 from getting stuck during movement.

[0047] In some embodiments, the insertion slot 211 further includes a stepped surface 2111. The stepped surface 2111 engages with the first port 111 to provide a limiting function. After the mounting housing 210 is inserted to a certain depth, the stepped surface 2111 engages with the first port 111, thereby preventing the mounting housing 210 from being inserted further. In this way, when the mounting housing 210 is inserted to a certain depth, the stepped surface 2111 abuts against the first port 111, which can accurately determine the insertion depth of the mounting housing 210 and the protective housing 110, thus avoiding over-insertion and damage to the components.

[0048] It is understandable that the step surface 2111 can be either the bottom of the insertion slot 211 or a newly set positioning surface.

[0049] Reference Figures 1 to 4 In some embodiments, the protective housing 110 further includes a second port 114. The digital pressure transmitter also includes a mounting base 400. The mounting base 400 is rotatably connected to the protective housing 110 via the second port 114. The mounting base 400 is provided with a connecting connector 410, which has a pressure detection port 411.

[0050] The connector 410 is used to connect the device under test or pipeline, thereby enabling the fixed installation of the digital pressure transmitter. It is understood that the connector 410 can be connected to the device under test or pipeline via threads or flanges.

[0051] The pressure detection port 411 is the channel through which the medium (such as gas or liquid) enters the digital pressure transmitter. The medium to be measured enters the interior of the digital pressure transmitter through this pressure detection port 411.

[0052] In practical applications, when a digital pressure transmitter is locked onto the device under test or pipeline, the protective housing 110 may be positioned opposite to the mounting housing 210 and the operator's field of vision, making it difficult for the operator to observe and read the data on the display screen 230. Therefore, in the above embodiment, by designing a rotatable connection between the mounting base 400 and the protective housing 110, the operator can rotate the protective housing 110 after installation to ensure that the display screen 230 always faces the optimal viewing angle without needing to disassemble and readjust.

[0053] Reference Figure 4 and Figure 8 In some embodiments, the mounting base 400 is provided with a mounting groove 420, which communicates with the pressure detection hole 411. The pressure measurement assembly 100 also includes a pressure measurement core 120, which is disposed within the mounting groove 420.

[0054] Specifically, the pressure measuring core 120 is used to directly sense the pressure change of the target and convert this pressure change into a measurable physical signal (such as resistance value, charge, etc.). It is understood that the pressure measuring core 120 can be a pressure core based on different working principles such as piezoresistive effect or piezoelectric effect.

[0055] The pressure measuring core 120 is a diffused silicon pressure core based on the piezoresistive effect. Its working principle is as follows: a corrugated diaphragm outside the pressure core senses external pressure and transmits it to the silicone oil filling the core. The silicone oil then transmits the pressure to the internally fixed silicon semiconductor. Under pressure, the silicon semiconductor undergoes slight deformation, causing a change in its resistance. The magnitude of this resistance change is proportional to the pressure value. This change is detected by a circuit, which outputs a standard measurement signal corresponding to that pressure, thus completing the pressure detection.

[0056] Since the protective housing 110 needs to rotate, if the pressure measuring core 120 is placed on the protective housing 110, it will rotate with the protective housing 110. This means that, on the one hand, the measurement results are easily affected by the rotation; on the other hand, the seal is easily damaged. To solve this problem, in this embodiment, the pressure measuring core 120 is fixed inside the mounting base 400, thereby ensuring both measurement accuracy and seal durability.

[0057] Understandably, the pressure measuring core 120 is pressed into the mounting groove 420 by the clamping nut 450.

[0058] In the above embodiment, a third sealing ring 430 is provided between the pressure measuring core 120 and the mounting groove 420 to prevent the measured medium from entering the protective housing 110, thereby preventing damage to other electrical components. In practical applications, the third sealing ring 430 can be a nitrile rubber sealing ring. It is understood that other sealing rings, such as fluororubber, can also be used.

[0059] Reference Figures 3 to 5 In some embodiments, a fourth sealing ring 240 is provided between the peripheral wall 2112 of the insertion slot 211 and the protective housing 110. This prevents external environmental factors (such as dust, moisture, etc.) from entering the digital pressure transmitter from between the protective housing 110 and the mounting housing 210, thereby ensuring that the internal electrical components can work normally.

[0060] Reference Figure 4 , Figure 7 and Figure 8 In some embodiments, the outer peripheral wall of the mounting base 400 is provided with a second annular groove 440. The outer peripheral wall of the protective housing 110 is provided with a first connecting hole 115. The digital display pressure transmitter also includes a rotating block 500, a connecting member 600, and a limiting pin 700.

[0061] The rotating block 500 is movably disposed within the second annular groove 440 and can move along the second annular groove 440. The rotating block 500 is provided with a second connecting hole 510. A connecting member 600 passes through the first connecting hole 115 and the second connecting hole 510, thereby connecting the protective housing 110 and the rotating block 500 into a single unit. A limiting pin 700 is at least partially located in the second annular groove 440 to stop the rotating block 500.

[0062] In practical applications, since the protective housing 110 contains the pressure measuring core 120 and other electrical components, which are connected by complex cables, the protective housing 110 and the mounting base 400 can only rotate relative to each other at a certain angle. Unrestricted rotation could break the cables. Therefore, in the above embodiment, a rotating block 500 is provided, which can move along the second annular groove 440. Then, the protective housing 110 and the rotating block 500 are connected together by a connector 600. Thus, when the protective housing 110 rotates, it drives the rotating block 500 to rotate. When the rotating block 500 rotates to the position of the limiting pin 700, it is stopped by the limiting pin 700, preventing the protective housing 110 from rotating. This forces the protective housing 110 to rotate in reverse until it is stopped again by the limiting pin 700.

[0063] In the above embodiment, the rotation angle is limited by setting a limiting pin 700. This ensures that the protective housing 110 and the mounting base 400 cannot rotate without restriction, effectively protecting the cable from damage and ensuring the normal operation of the digital pressure transmitter. Furthermore, the rotating block 500 is fitted within the second annular groove 440, allowing only rotational movement and preventing axial movement, thus preventing the protective housing 110 from detaching from the mounting base 400. This not only ensures rotational flexibility but also simplifies the structure and guarantees the stability and reliability of the connection between the protective housing 110 and the mounting base 400.

[0064] Understandably, connector 600 can be a screw, pin, etc.

[0065] Taking a screw as an example, the first connecting hole 115 and the second connecting hole 510 are threaded holes.

[0066] In some embodiments, a limiting pin hole is provided in the second annular groove 440, and a limiting pin 700 is disposed in the limiting pin hole.

[0067] In some embodiments, the digital pressure transmitter further includes a first sealing ring 140. The first sealing ring 140 is disposed between the protective housing 110 and the mounting base 400, and is located on one side of the second annular groove 440. In this way, external environmental factors (such as dust, moisture, etc.) can be prevented from entering the digital pressure transmitter from between the protective housing 110 and the mounting base 400, so as to ensure that the internal electrical components can work normally.

[0068] In the above embodiment, the digital pressure transmitter further includes a second sealing ring 150. The second sealing ring 150 is disposed between the protective housing 110 and the mounting base 400, and is located on the other side of the second annular groove 440. This further improves the sealing performance between the protective housing 110 and the mounting base 400.

[0069] It is understandable that the seal is prone to failure because the protective housing 110 needs to rotate. In this embodiment, by providing a first sealing ring 140 and a second sealing ring 150 on both sides of the second annular groove 440, a double sealing protection can be formed, which can effectively prevent the seal from failing.

[0070] It is understandable that the first sealing ring 140 and the second sealing ring 150 can be rubber or sealant, etc.

[0071] Reference Figures 9 to 11 In some embodiments, the outer peripheral wall of the protective housing 110 is also provided with an aviation connector 160, and the pressure measuring assembly 100 also includes a first circuit board 130, which is disposed inside the protective housing 110; the aviation connector 160 and the first circuit board 130 are electrically connected.

[0072] Specifically, the first circuit board 130 is electrically connected to the pressure measuring core 120 and is used to receive the physical signal output by the pressure measuring core 120 and process and convert it into a standard electrical signal to provide basic data for subsequent processing.

[0073] In the above embodiment, the aviation connector 160 is used as the signal output port. The aviation connector 160 can stably transmit the signal of the first circuit board 130 to the external device. The connection through the aviation connector 160 is stable and reliable, and is easy to maintain and replace.

[0074] Reference Figure 10 and Figure 11 In some embodiments, the aviation connector 160 includes a mounting base 161 and a core 162. One end of the mounting base 161 is connected to the protective housing 110, and the other end is provided with at least two potting recesses 163. The core 162 has leads 164 and is disposed within the mounting base 161. A potting layer 165 fills the potting recesses 163.

[0075] In the above embodiment, by setting the potting layer 165, a stable and sealed overall structure can be formed between the glue core 162 and the fixing seat 161 to ensure that external signals can be output stably.

[0076] The core 162 can be made of plastic. The periphery of the pin 164 is provided with silicone, which can further improve the sealing performance.

[0077] The potting layer 165 is an epoxy resin layer. It is understood that the potting layer 165 could also be a polyurethane layer or a silicone rubber layer.

[0078] In the above embodiment, the fixing base 161 and the protective housing 110 are connected by laser welding.

[0079] Reference Figures 1 to 4 In some embodiments, the top of the mounting housing 210 is provided with an inclined viewing surface 214. The digital display assembly 200 includes a display screen 230; the display screen 230 is fitted to the inner side of the viewing surface 214. By providing an inclined viewing surface 214, the operator can easily observe the content of the display screen 230.

[0080] In some embodiments, the digital display assembly further includes a second circuit board 220 and a membrane keypad 250. The second circuit board 220 is disposed within the mounting housing 210 and is connected to the display screen. The membrane keypad 250 is disposed on the outer side of the viewing surface 214 and is electrically connected to the second circuit board 220.

[0081] Specifically, the second circuit board 220 is electrically connected to the first circuit board 130 and is used to receive electrical signals from the first circuit board 130 and perform further signal processing and digital conversion.

[0082] The second circuit board 220 and the display screen 230 are integrated and connected to the mounting housing 210 via multiple pressure caps 260. The second circuit board 220 has silicone seals around its perimeter. This prevents external environmental factors (such as dust and moisture) from entering the digital pressure transmitter, ensuring the normal operation of the internal electrical components.

[0083] The display screen 230 is electrically connected to the second circuit board 220 and is used to display the pressure data processed by the second circuit board 220 in a digital form so that the operator can quickly read the pressure value and understand the pressure status of the target under test.

[0084] The membrane keypad 250 and the display screen 230 form an integrated "observation-operation" design. Operators can adjust parameters by pressing the keypad, which can improve operating efficiency.

[0085] It is understandable that the membrane button 250 and the viewing surface 214 are bonded together. Specifically, this could be done using double-sided adhesive.

[0086] In some embodiments, a silicone seal is provided at the connection port 215 between the membrane key 250 and the second circuit board 220, thereby further improving the sealing performance.

[0087] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0088] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A digital display pressure transmitter, characterized in that, include: A pressure measuring assembly has a protective housing; the protective housing has a first port; the outer peripheral wall of the protective housing is provided with a first annular groove and a positioning groove, and the positioning groove extends from the first annular groove to the first port; An elastic retaining ring is disposed within the first annular groove; A digital display assembly includes a mounting housing; the mounting housing is provided with a plug-in slot and a positioning block; the plug-in slot is fitted onto the outside of the protective housing via a first port, and the positioning block is disposed on the peripheral wall of the plug-in slot and engages with the positioning groove. As the positioning block moves along the positioning groove to the elastic retaining ring, the positioning block compresses the elastic retaining ring toward the protective housing until the positioning block passes the elastic retaining ring, at which point the elastic retaining ring recovers and prevents the positioning block from coming out.

2. The digital display pressure transmitter according to claim 1, characterized in that, The positioning block is provided with a guide ramp.

3. The digital display pressure transmitter according to claim 1, characterized in that, The insertion slot is also provided with a stepped surface; the stepped surface and the first port are engaged.

4. The digital display pressure transmitter according to claim 1, characterized in that, The protective housing further includes a second port; wherein, the digital display pressure transmitter further includes: The mounting base is rotatably connected to the protective housing via the second port; the mounting base is provided with a connecting joint, and the connecting joint is provided with a pressure detection hole.

5. The digital display pressure transmitter according to claim 4, characterized in that, The outer peripheral wall of the mounting base is provided with a second annular groove, and the outer peripheral wall of the protective housing is provided with a first connecting hole; wherein, the digital display pressure transmitter further includes: A rotating block is movably disposed in the second annular groove and can move along the second annular groove; the rotating block is provided with a second connecting hole; The connector passes through the first connecting hole and the second connecting hole; A limiting pin, at least partially located in the second annular groove, stops the rotating block.

6. The digital display pressure transmitter according to claim 4, characterized in that, The mounting base is provided with a mounting groove, and the mounting groove is connected to the pressure detection hole; The pressure measurement assembly further includes a pressure measurement core, which is disposed in the mounting slot.

7. The digital display pressure transmitter according to claim 6, characterized in that, A third sealing ring is provided between the pressure measuring core and the mounting groove; and / or A fourth sealing ring is provided between the peripheral wall surface and the protective shell.

8. The digital display pressure transmitter according to claim 5, characterized in that, The digital display pressure transmitter also includes: A first sealing ring is disposed between the protective housing and the mounting base, and located on one side of the second annular groove; and / or The second sealing ring is disposed between the protective housing and the mounting base, and is located on the other side of the second annular groove.

9. The digital pressure transmitter according to any one of claims 1 to 8, characterized in that, The outer peripheral wall of the protective housing is provided with an aviation connector, and the pressure measuring component also includes a first circuit board; the first circuit board is disposed inside the protective housing; the aviation connector and the first circuit board are electrically connected.

10. The digital display pressure transmitter according to claim 9, characterized in that, The aviation connector includes: The mounting base is connected to the protective housing at one end and has at least two potting grooves at the other end. The core has leads and is disposed within the mounting base; A potting layer that fills the potting groove.

11. The digital pressure transmitter according to any one of claims 1 to 8, characterized in that, The top of the mounting housing is provided with an inclined viewing surface; the digital display assembly includes a display screen; the display screen and the inner side of the viewing surface are fitted together.

12. The digital display pressure transmitter according to claim 11, characterized in that, The digital display component also includes: A second circuit board is disposed within the mounting housing; the second circuit board is connected to the display screen; A membrane button is located on the outer side of the observation surface and is electrically connected to the second circuit board.

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