CN115824494A - Differential pressure sensor detection calibration device - Google Patents

Abstract

A differential pressure sensor detection and calibration device includes: a base; an air supply assembly arranged in the base; a supporting plate arranged on the base; a calibration plate arranged on the supporting plate; and can move up and down so that the The calibration plate and the supporting plate are pressed against the base. The pressure plate is configured such that when the multiple differential pressure sensors to be tested and calibrated are placed on the supporting plate, the compression of the pressure plate prompts the multiple differential pressure sensors to be electrically connected to the calibration plate, and It is in airtight communication with the gas supply assembly. The present invention adopts a comprehensive device composed of a single support plate, a pressure plate, a calibration plate, a base and an air supply assembly to perform detection and calibration operations on a plurality of differential pressure sensors, with high operating efficiency and high consistency of product detection and calibration.

Description

Differential pressure sensor detection and calibration device

technical field

The invention relates to the technical field of differential pressure sensor detection and calibration, in particular to a differential pressure sensor detection and calibration device.

Background technique

The differential pressure sensor is used to detect the flow of gas in a specific container. It works based on the principle that the flow of fluid transfers heat to change the temperature distribution of the two temperature measuring elements on the gas flow.

The sensor is composed of a heating element and two temperature measuring elements, wherein the heating element is arranged in the middle of the pipe and is heated at a constant power, and the two temperature measuring elements are symmetrically arranged upstream and downstream of the heating element to measure the temperature at the corresponding position. When the airflow is at rest, its velocity is theoretically zero and the temperature distribution at both ends of the heating element is the same. When the gas flows at a certain speed, the heat of the upstream tube wall is transferred to the downstream tube wall when the gas flows, thus changing the distribution relationship of the tube wall temperature. Within a certain flow range, the temperature difference between the temperature measuring elements and the measured flow are in a linear relationship. Therefore, the corresponding flow rate can be directly calculated by measuring the temperature difference between the two temperature measuring elements. Specifically, the temperature measuring element is usually implemented by a thermistor, so when the gas flows, the temperature distribution of the thermistor itself changes, so the resistance changes accordingly, and the voltage applied across the thermistor also changes, By measuring the voltage change, the flow rate of the gas is obtained through conversion calculation.

Before the differential pressure sensor is manufactured and leaves the factory, it needs to be calibrated with the help of various tools and electronic equipment. The so-called calibration is to check whether the produced differential pressure sensor has product defects on the one hand, and to calibrate various parameters of the differential pressure sensor on the other hand, such as setting the detection accuracy and detection value range, etc.

The detection and calibration process of the differential pressure sensor requires that the corresponding differential pressure sensor to be detected interact with a gas of a certain flow rate and temperature, and the sensor is connected to the electronic device in communication, that is, the gas needs to be passed into the closed gas chamber of the sensor. Then flow through the corresponding thermal elements (two temperature-measuring elements), and measure the voltage of the two temperature-measuring elements with the help of electronic equipment to convert and obtain the gas flow rate or flow. By comparing the obtained gas flow rate or flow data with the standard data to implement subsequent calibration and calibration procedures, or to determine whether the sensor is faulty.

In the prior art, the detection and calibration is done by the worker. According to the average operation and processing capacity of the worker, several differential pressure sensors can be tested and calibrated each time. The worker first fixes these differential pressure sensors on separate detection fixtures, and then Insert the corresponding number of air pipes into the corresponding inlet and outlet of these differential pressure sensors, and at the same time electrically connect these differential pressure sensors to the electronic equipment, and judge the parameters of each differential pressure sensor by observing the parameters displayed on the display screen of the electronic equipment. Whether there is a fault or check and calibrate it. On the one hand, this single and manual testing and calibration method leads to low efficiency of product testing and calibration, because: firstly, the cycle and time for testing each batch of differential pressure sensors are too long, resulting in the need to make many testing fixtures, or to connect many air pipes, These tools are placed on the workbench or in the box, but the production site is in short supply, which is not conducive to the mass production of production; secondly, using multiple testing fixtures, workers need to frequently operate the testing fixtures to replace the products in the testing fixtures, pick and place Too many actions not only waste time, but also uncontrollable test time; in addition, it is difficult to ensure that these test fixtures have the same manufacturing accuracy and consistency, so the consistency of products tested by different test fixtures is very poor; in addition, due to Multiple gas pipes supply gas to the corresponding differential pressure sensors, and it is difficult to ensure that the gas supplied by different gas pipes has the same flow rate, pressure and purity, so the consistency of each differential pressure sensor for detection and calibration is also very low.

Therefore, it is practically necessary in the industry to provide a differential pressure sensor detection and calibration device to overcome the above-mentioned defects in the prior art.

Contents of the invention

The object of the present invention is to solve the above problems, and to provide a detection and calibration device for a differential pressure sensor.

For meeting the purpose of the present invention, the present invention adopts following technical scheme:

A differential pressure sensor detection and calibration device includes:

base;

an air supply assembly disposed within the base;

a supporting plate arranged on the base;

a calibration plate arranged on said pallet; and

A pressure plate that can move up and down so as to press the calibration plate and the supporting plate toward the base; Squeezing causes the differential pressure sensor to be electrically connected to the calibration plate and in air-tight communication with the gas supply assembly.

In one embodiment, preferably, the bottom of the base forms a cavity, and the top forms a pallet support platform with an opening, and the opening communicates with the cavity; the air supply assembly is arranged in the cavity , the pallet is arranged on the pallet supporting platform. Since the gas supply assembly is arranged in the cavity, and the cavity communicates with the opening, the differential pressure sensor to be checked and calibrated on the pallet can be conveniently passed through the opening to communicate with the opening. Air-tight conduction of the above gas supply components.

Preferably, a plurality of differential pressure sensor placement holes are opened on the support plate for setting corresponding differential pressure sensors therein. Specifically, each of the differential pressure sensors has an air inlet post and an air outlet post located at its own bottom and pins located at its own top, and the inlet post is provided with a guide pin connected to the inner chamber of the differential pressure sensor. There is an air inlet hole through which the air outlet column communicates with the inner chamber of the differential pressure sensor. The air inlet hole and the air outlet hole are used to communicate with the gas supply assembly, so that the gas enters the chamber inside the differential pressure sensor from the air supply assembly, and then enters the gas supply assembly from the air outlet hole, so that the gas is in the differential pressure Circulation between sensor and air supply assembly.

At least one step is formed on the inner wall of each differential pressure sensor installation hole, so that the corresponding differential pressure sensor rests on the at least one step, so that the differential pressure sensor is placed in the differential pressure sensor installation hole , and at the same time let the rest of the differential pressure sensor not resting on the stepped portion (intake column and outlet column) be exposed from the differential pressure sensor installation hole to the bottom of the support plate. In this way, on the one hand, the differential pressure sensor can be movably placed on the supporting plate, and the air inlet column and the air outlet column of the differential pressure sensor can be exposed to the bottom of the supporting plate from the differential pressure sensor installation hole, which is convenient for the air intake column and the air outlet column. An airtight connection between the air outlet column and the air supply assembly.

Preferably, pin fixing holes corresponding to the placement holes of the differential pressure sensor are opened on the calibration plate. When the differential pressure sensor to be tested and calibrated is placed on the support plate, the pins on the top of the differential pressure sensor are pushed tightly into the corresponding pin fixing holes on the calibration plate by the extrusion of the pressure plate, so that The pins are electrically connected with the circuit board on the calibration board.

Preferably, an annular limiting wall is formed around the supporting platform of the base, so as to limit the supporting plate in an annular area defined by the annular limiting wall. In this way, when the pressing plate moves downward so as to press the calibration plate and the pallet toward the pallet support table, the pallet will not deviate laterally, thereby avoiding the The lateral offset causes the pins of the differential pressure sensor to be tested and calibrated to be unable to be accurately inserted into the corresponding pin fixing holes of the calibration plate, and also prevents the inlet and outlet columns of the differential pressure sensor from being unable to be accurately inserted into the air supply assembly .

Preferably, support columns are set up around the pallet support platform of the base; the top of the support columns supports the installation plate; the installation plate is provided with a cylinder, and the cylinder includes a A cylinder block and a push rod protruding from the bottom of the cylinder block, a connection block is installed on the push rod, and the connection block is fixed with the pressure plate. When the cylinder is controlled by the external drive system, it will drive the push rod to move up and down, thereby driving the pressure plate to move up and down together, and then realize the downward extrusion action on the calibration plate and the supporting plate.

Further preferably, pressure columns are provided on the bottom surface of the pressure plate; and relief pits corresponding to the pressure columns are opened on the calibration plate. When the pressure plate moves downward, the pressure column on the pressure plate will push against the calibration plate, thereby prompting the pins on the differential pressure sensor to be tightly inserted into the pin fixing holes, so that the pins and the calibration plate The circuit board is electrically connected. Since there is a certain distance between the pressing column and the bottom of the pressing plate, and the pressing column abuts against a position other than the pins on the calibration plate, the pressure plate is prevented from protruding from the top surface of the calibration plate. Pins that come out are crushed.

Preferably, in order to maintain the accurate movement direction (vertical direction) of the pressing plate when it moves up and down, so as to avoid or weaken the lateral offset of the supporting plate on the supporting plate supporting platform of the base caused by insufficient direction accuracy, the pressing plate can be A plurality of guide pillars are arranged on the edge, and guide sleeves are arranged on the corresponding parts on the installation plate. The precise sliding fit between the guide post and the guide sleeve ensures the precision of the up and down movement of the pressing plate.

Preferably, the air supply assembly includes: a main air supply block and side air supply blocks that are sealed and buckled on the left and right sides of the main air supply block. The inside of the main air supply block is formed with a main air chamber penetrating the main air supply block in the left and right direction and a plurality of air supply holes opened on the top of the main air supply block and communicating with the main air chamber. Each side air supply block is provided with a side air compartment formed only transversely towards one direction. One of the side air supply blocks is provided with an air supply port that communicates with the corresponding side air compartment, while the other side air supply block is provided with an exhaust port that is communicated with the corresponding side air compartment. In the structure composed of the above-mentioned main air supply block and the side air supply blocks which are respectively sealed and buckled on the left and right sides of the main air supply block, the main air chamber and the two side air chambers together form a large air Chamber.

Preferably, a spoiler is set in the side air compartment of the at least one side air supply block, and the spoiler can make the high-speed turbulent gas entering the gas chamber from the air supply port be blocked by the spoiler to reduce the flow velocity And it tends to be uniform, so as to output uniform gas to the differential pressure sensor through the above-mentioned gas supply hole.

Preferably, for convenience and quickness, the differential pressure sensor that has been calibrated is detached from the gas supply assembly, that is, the inlet column and the outlet column of the differential pressure sensor are pulled out from the air supply hole, so that the differential pressure sensor can be taken out from the supporting plate , an elastic jacking column assembly is arranged on the periphery of the pallet supporting platform of the base, which includes a housing cover fixed on the pallet supporting platform and a jacking column elastically arranged in the housing sleeve.

When testing and calibrating the differential pressure sensor, the pressure plate is pressed against the calibration plate, so that the support plate presses down on the ejector column to make it return to the containing sleeve; and when the calibration of the differential pressure sensor is completed Afterwards, the pressure plate returns upwards to the cylinder block. At this time, the top column compressed in the housing sleeve returns to its original position upwards, and then the supporting plate set on it is ejected, so that under the action of elastic force, the The air inlet column and the air outlet column of the differential pressure sensor are pulled out from the air supply hole, so that the operator does not have to manually pull out the laborious operation, and since the supporting plate is pushed up by the supporting column, the supporting plate and the A certain gap is formed between the pallet supporting platforms, so that the operator can easily take out the pallet.

Compared with the prior art, the advantages of the present invention are as follows:

By placing the pallet on the base, for example, the pallet support platform of the base corresponds to the position of the air supply component, and then place the differential pressure sensors that need to be detected and calibrated on the appropriate position of the pallet, and then place the calibration board on the On the supporting plate, press the calibration plate with the help of a pressure plate that can move up and down, so that the pins on the sensor are connected with the corresponding connection terminals on the calibration plate to realize the electrical connection between all differential pressure sensors and the calibration plate, and connect all differential pressure sensors It is airtightly connected to the gas supply assembly, so that the gas can flow through each differential pressure sensor evenly, and then all sensors can be detected and calibrated through the calibration plate. All differential pressure sensors are electrically connected to the calibration board at the same time, and the gas is supplied by the gas supply component synchronously, so the operation efficiency is high, and the flow rate and purity of the gas supplied to each differential pressure sensor are uniform, which ensures the accuracy of these differential pressure sensors Detection calibration has a high consistency.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and will become apparent from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is a perspective view of a differential pressure sensor detection and calibration device of the present invention.

FIG. 2 is an exploded perspective view of the differential pressure sensor detection and calibration device shown in FIG. 1 .

FIG. 3 is a perspective view of a base of the differential pressure sensor detection and calibration device shown in FIG. 2 .

FIG. 4 is an exploded perspective view of an air supply assembly of the differential pressure sensor detection and calibration device shown in FIG. 2 .

Fig. 5a is a perspective view of a supporting plate of the differential pressure sensor detection and calibration device shown in Fig. 2 .

Fig. 5b is a perspective view of a calibration plate of the differential pressure sensor detection and calibration device shown in Fig. 2 .

Fig. 5c is a partially enlarged view of part A of the calibration board shown in Fig. 5b, showing a group of pin fixing holes opened on the calibration board.

FIG. 6 is a perspective view of the differential pressure sensor detection and calibration device shown in FIG. 1 viewed from another angle.

FIG. 7 is a front view of the differential pressure sensor detection and calibration device shown in FIG. 1 , showing the positions and connections among the calibration plate, the supporting plate, the differential pressure sensor and the base.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are examples, and are only for explaining the present invention and should not be construed as limiting the present invention.

Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and/or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and/or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Additionally, "connected" or "coupled" as used herein may include wireless connection or wireless coupling. The expression "and/or" used herein includes all or any elements and all combinations of one or more associated listed items.

Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as commonly understood by those of ordinary skill in the art to which this invention belongs. It should also be understood that terms, such as those defined in commonly used dictionaries, should be understood to have meanings consistent with their meaning in the context of the prior art, and unless specifically defined as herein, are not intended to be idealized or overly Formal meaning to explain.

In one embodiment of the present invention, referring to FIGS. 1-7 , a differential pressure sensor detection and calibration device 100 includes:

base 10;

an air supply assembly 20 arranged in the base 10;

The supporting plate 60 arranged on the base 10;

A calibration plate 70 arranged on the supporting plate 60; and

A pressure plate 50 that can move up and down so that the calibration plate 70 and the supporting plate 60 are pressed toward the base 10; Afterwards, the pressing of the pressure plate 50 prompts the differential pressure sensor 80 to be electrically connected to the calibration plate 70 , and to conduct airtight communication with the gas supply assembly 20 .

In the above-mentioned embodiment, by placing the pallet on the base, for example, the pallet support platform of the base corresponds to the position of the gas supply assembly, and then place the differential pressure sensors that need to be detected and calibrated one by one on the proper position of the pallet, and then Place the calibration plate on the supporting plate, press the calibration plate towards the base with the help of the pressure plate that can move up and down, so that the pins on each sensor are engaged with the corresponding connection terminals on the calibration plate to realize the connection between all differential pressure sensors and The electrical connection of the calibration board, and at the same time, all the differential pressure sensors are airtightly connected to the gas supply components, so that the gas can flow through each differential pressure sensor evenly at the same time, and then all the sensors are detected and calibrated through the calibration board. In this detection and calibration method, all differential pressure sensors are electrically connected to the calibration board at the same time, and the gas is supplied by the gas supply component synchronously, so not only the operation efficiency is high, but also the same gas supply component supplies gas to all the differential pressure sensors, so The flow rate and purity of the gas supplied to each differential pressure sensor is uniform, which ensures a high degree of consistency in the detection and calibration of these differential pressure sensors.

In other words, in the present invention, multiple differential pressure sensors are tested and calibrated by using a comprehensive device composed of a single supporting plate, a pressure plate, a calibration plate, a base and an air supply assembly, so it is not necessary to A separate fixture is used for single sensor operation, so the operation efficiency is high and the consistency of product detection and calibration is high.

In one embodiment, preferably, the bottom of the base 10 forms a cavity 14, and the top forms a pallet support platform 12 with an opening 122, and the opening 122 communicates with the cavity 14; the air supply assembly 20 Arranged in the cavity 14 , the pallet 60 is disposed on the pallet supporting platform 12 . Since the air supply assembly 20 is arranged in the cavity 14, and the cavity 14 is connected to the opening 122, the differential pressure sensor 80 to be checked and calibrated on the support plate 60 can be easily passed through. The opening 122 is in airtight communication with the air supply assembly 20 .

Preferably, further referring to FIG. 5 a , a plurality of differential pressure sensor placement wells 62 are opened on the support plate 60 for setting corresponding differential pressure sensors 80 therein. Specifically, each of the differential pressure sensors 80 has an air inlet column 84 and an air outlet column 86 located at its own bottom and a pin 82 located at its own top, and the inlet column 84 is provided with a The inner chamber of the differential pressure sensor 80 is connected to an air inlet hole (not shown in the figure), and the air outlet column 86 is provided with an air outlet hole (not shown in the figure) connected to the inner chamber of the differential pressure sensor 80 . Each of the air inlet hole and the air outlet hole is used to communicate with the gas supply assembly 20, so that the gas enters the chamber inside the differential pressure sensor 80 from the air supply assembly 20, and then flows out from the air outlet hole. The gas supply component 20 realizes the circulation of gas between the differential pressure sensor and the gas supply component.

At least one step 622 is formed on the inner wall (not labeled) of each differential pressure sensor placement well 62, so that the corresponding differential pressure sensor 80 rests on the at least one step 622, so that the differential pressure sensor 80 placed in the differential pressure sensor installation well 62, while allowing the rest of the differential pressure sensor 80 not resting on the stepped portion 622 (intake column 84 and air outlet column 86) to be exposed from the differential pressure sensor installation well 62 to the The bottom of the pallet 60. In this way, on the one hand, the differential pressure sensor 80 can be movably rested on the supporting plate 60, and the air inlet column 84 and the air outlet column 86 of the differential pressure sensor 80 can be exposed to the bottom of the supporting plate 60 from the differential pressure sensor placement well 62. , which facilitates the airtight connection between the air inlet column 84 and the air outlet column 86 and the air supply assembly 20 .

Preferably, referring to FIGS. 5 b - 5 c , pin fixing holes 72 corresponding to the differential pressure sensor placement wells 62 are opened on the calibration plate 70 . When the differential pressure sensor 80 to be tested and calibrated is placed on the support plate 60, the pins 82 on the top of the differential pressure sensor 80 are pushed tightly into the corresponding pins on the calibration plate 70 by the extrusion of the pressure plate 50 In the fixing hole 72 , the pin 82 is electrically connected to the circuit board (not shown) on the calibration board 70 .

Preferably, an annular limiting wall 124 is formed around the pallet supporting platform 12 of the base 10 , so as to restrict the pallet 60 in the annular area defined by the annular limiting wall 124 . In this way, when the pressing plate 50 moves downward so as to press the calibration plate 70 and the pallet 60 toward the pallet support table 12, the pallet 60 will not deviate laterally, thereby avoiding the Due to the lateral offset of the plate 70 and the supporting plate 60, the pins 82 of the differential pressure sensor 80 to be tested and calibrated cannot be accurately inserted into the corresponding pin fixing holes 72 of the calibration plate 70, and the intake column of the differential pressure sensor 80 is also avoided. 84 and air outlet column 86 cannot be inserted into the air supply assembly 20 precisely.

Preferably, support columns 126 are provided around the pallet support platform 12 of the base 10; the top of the support columns 126 supports the mounting plate 30; the mounting plate 30 is provided with a cylinder 40, and the cylinder 40 includes The cylinder block 42 installed on the mounting plate 30 and the push rod 44 protruding from the bottom of the cylinder block 42, the connecting block 46 is installed on the pushing rod 44, and the connecting block 46 and the pressing plate 50 fixed. When the cylinder 40 is controlled by the external drive system, it will drive the push rod 44 to move up and down, thereby driving the pressing plate 50 to move up and down together, thereby realizing the downward pressing action on the calibration plate 70 and the supporting plate 60 .

Further preferably, a pressure column 54 is provided on the bottom surface of the pressure plate 50 ; a relief pit 74 corresponding to the pressure column 54 is opened on the calibration plate 70 . When the pressure plate 50 moves downward, the pressure column 54 on the pressure plate 50 will abut against the calibration plate 70, thereby prompting the pins 82 on the differential pressure sensor 80 to be tightly inserted into the pin fixing holes 72, so that the The pins 82 are electrically connected to a circuit board (not shown) on the calibration board 70 . Since the pressure column 54 is separated from the bottom of the pressure plate 50 by a certain distance, and the pressure column 54 abuts against a position other than the pin 82 on the calibration plate 70, the pressure plate 50 is prevented from falling from the The protruding pins 82 from the top surface of the calibration board 70 are crushed.

Preferably, in order to maintain the accurate movement direction (vertical direction) of the pressing plate 50 when it moves up and down, so as to avoid or weaken the lateral deviation of the supporting plate 60 on the supporting plate supporting platform 12 of the base 10 caused by insufficient direction accuracy, it can be A plurality of, for example, four guide posts 52 are provided on the edge of the pressing plate 50 , and guide sleeves (not numbered) are provided on the corresponding parts of the mounting plate 30 . The precise sliding fit between the guide post 52 and the guide sleeve ensures the precision of the up and down movement of the pressing plate 50 .

Preferably, the air supply assembly 20 includes: a main air supply block 222 and side air supply blocks 224 that are sealed and fastened to the left and right sides of the main air supply block 222 respectively. The interior of the main air supply block 222 forms a main air compartment 2222 that runs through the main air supply block 222 in the left and right direction, and a plurality of air chambers 2222 that are opened on the top of the main air supply block 222 and communicate with the main air supply block 2222 . Air supply hole 2224. Each side air supply block 224 is provided with a side air chamber 2242 that is only laterally formed in one direction. One of the side air supply blocks 224 is provided with an air supply port 2244 leading to the corresponding side air chamber 2242 , while the other side air supply block 224 is provided with an exhaust port 2241 leading to the corresponding side air chamber 2242 . In the structure composed of the above-mentioned main air supply block 222 and the side air supply blocks 224 which are respectively sealed and buckled on the left and right sides of the main air supply block 222, the main air chamber 2222 and the two side air chambers 2242 are jointly formed a large gas chamber.

Preferably, a spoiler 2246 is provided in the side air compartment 2242 of the at least one side air supply block 224, and the spoiler 2246 can allow the high-speed turbulent gas entering the gas chamber from the air supply port 2244 to be disturbed. The plate 2246 blocks to reduce the flow rate and tends to be uniform, so as to output uniform gas to the differential pressure sensor 80 through the above-mentioned gas supply hole 2224 .

Preferably, for convenience and quickness, the differential pressure sensor 80 that has been calibrated is detached from the air supply assembly 20, that is, the inlet column 84 and the outlet column 86 of the differential pressure sensor 80 are pulled out from the air supply hole 2224, so that the differential pressure sensor 80 can be pulled out from the air supply hole 2224. The pressure sensor 80 is taken out from the pallet 60, and an elastic jack assembly 128 is arranged on the periphery of the pallet support platform 12 of the base 10, which includes a housing sleeve 1282 fixed on the pallet support platform 12 and elastically arranged on the pallet support platform 12. The top column 1284 in the receiving sleeve 1282 is described.

When detecting and calibrating the differential pressure sensor 80, the pressure plate 50 is pressed against the calibration plate 70, so that the supporting plate 60 presses down on the ejector post 1284 to return it to the housing sleeve 1282; After the detection and calibration of the pressure sensor 80 is completed, the pressure plate will return upward to the cylinder body 42. At this time, the top column 1284 compressed in the housing sleeve 1282 will return to its original position upward, and then the supporting plate 60 set on it will be returned to its original position. Push out, so that under the action of elastic force, the inlet column 84 and the outlet column 86 of the differential pressure sensor 80 are pulled out from the air supply hole 2224, so that it is not necessary for the operator to manually pull out the laborious operation, and due to the support After the board 60 is pushed up by the jacking column 1284 , a certain gap is formed between the pallet 60 and the pallet supporting platform 12 , so that the operator can easily take out the pallet 60 .

The working process of the differential pressure sensor detection and calibration device 100 provided by the present invention will be described in detail below.

First, the operator places a plurality of differential pressure sensors 80 that need to be detected and calibrated in the sensor placement holes 62 of the pallet 60 one by one, and simultaneously places the calibration plate 70 on the top of the pallet 60, and then places the pallet 60 with the calibration plate 70 The combination together with a plurality of differential pressure sensors 80 placed on the pallet 60 rests on the pallet support platform 12 of the base 10 (supported by the elastic jack assembly 128), and the cylinder 40 is controlled by an external control system (not shown). Next, drive the push rod 44 to move downward, and then drive the pressure plate 30 to move downward. At this time, the elastic jack 1284 of the elastic jack assembly 128 gradually retreats into the housing 1282, and then the pins 82 of each differential pressure sensor 80 are tightly inserted. Corresponding pins on the calibration plate 70 are fixed in the holes 72, so as to realize the electrical connection between each differential pressure sensor 80 and the calibration plate 70, and then, the pressure plate 30 continues to press down, so that the elastic top column 1284 is finally completely returned to the housing sleeve 1282 The air inlet column 84 and the air outlet column 86 of each differential pressure sensor 80 are inserted into the air supply hole 2224 corresponding to the top of the main air supply block 222 of the air supply assembly 20 in a corresponding airtight manner, thereby realizing the 80 and the gas-tight connection of the gas supply assembly 20, and then, an externally driven pump (not shown) will input the gas from the gas supply port 2244 of one of the side gas supply blocks 224 into the side gas supply block 224, through The turbulence and filtration of the spoiler 2246 further removes impurities in the gas and ensures the purity of the gas. At the same time, the turbulence further makes the gas flow more gentle and uniform, avoiding the generation of torrents and affecting the detection and calibration results. After the gas is filtered and disturbed, it enters the main air chamber 2222 of the main air supply block 222, and then the gas enters the corresponding differential pressure sensor 80 from the air supply hole 2224 and the inlet column 84, and then flows from the outlet column 86 and the corresponding other One air supply hole 2224 flows back into the main air compartment 2222 again, and then the gas flows out from the exhaust port 2241 of the other side air supply block 224 .

During the process of gas flowing through the differential pressure sensor 80, the corresponding resistance changes of the temperature measuring element (thermistor) and the heating element in the sensor 80 are passed through the calibration plate 70 electrically connected to the sensor 80 and the corresponding external control system Now, the detection and calibration of the sensor 80 is performed. Since the process of detection and calibration itself is well known in the industry, the detailed detection and calibration process will not be repeated here.

After the gas flows out from the exhaust port 2241 of the other side air supply block 224, the cylinder 40 is controlled externally to drive the push rod 44 to retract upwards. The two air inlet columns 84 and air outlet columns 86 of 80 are separated from the corresponding air supply holes 2224 , and the pallet 60 is separated from the pallet support table 12 by a certain distance, so that the operator can easily remove the pallet 60 from the base 10 .

In the above-mentioned embodiment, by placing the pallet on the base, for example, the pallet support platform of the base corresponds to the position of the gas supply assembly, and then place the differential pressure sensors that need to be detected and calibrated one by one on the proper position of the pallet, and then Place the calibration plate on the supporting plate, press the calibration plate towards the base with the help of the pressure plate that can move up and down, so that the pins on each sensor are engaged with the corresponding connection terminals on the calibration plate to realize the connection between all differential pressure sensors and The electrical connection of the calibration board, and at the same time, all the differential pressure sensors are airtightly connected to the gas supply components, so that the gas can flow through each differential pressure sensor evenly at the same time, and then all the sensors are detected and calibrated through the calibration board. In this detection and calibration method, all differential pressure sensors are electrically connected to the calibration board at the same time, and the gas is supplied by the gas supply component synchronously, so not only the operation efficiency is high, but also the same gas supply component supplies gas to all the differential pressure sensors, so The flow rate and purity of the gas supplied to each differential pressure sensor is uniform, which ensures a high degree of consistency in the detection and calibration of these differential pressure sensors.

Those skilled in the art can understand that the various operations, methods, and steps, measures, and schemes in the processes that have been discussed in this application can be replaced, changed, combined, or deleted. Furthermore, the various operations, methods, and other steps, measures, and schemes in the processes that have been discussed in this application may also be replaced, changed, rearranged, decomposed, combined, or deleted. Further, steps, measures, and schemes in the prior art that have operations, methods, and processes disclosed in the present application may also be alternated, changed, rearranged, decomposed, combined, or deleted.

The above descriptions are only some implementations of the present application. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the principle of the application. These improvements and modifications are also It should be regarded as the protection scope of this application.

Claims (11)

1. The utility model provides a differential pressure sensor detects calibration device which characterized in that includes:

a base;

the air supply assembly is arranged in the base;

the supporting plate is arranged on the base;

a calibration plate disposed on the pallet; and

a pressing plate movable up and down to press the calibration plate, the pallet, toward the base; the pressure plate is arranged to: after a plurality of differential pressure sensors to be detected and calibrated are placed on the supporting plate, the plurality of differential pressure sensors are electrically connected with the calibration plate and are communicated with the air supply assembly in an air-tight mode through the extrusion of the pressing plate.

2. The differential pressure sensor detection calibration apparatus of claim 1, wherein: a cavity is formed at the bottom of the base, a supporting plate supporting table with an opening is formed at the top of the base, and the opening is communicated with the cavity; the air supply assembly is arranged in the cavity, and the supporting plate is arranged on the supporting plate supporting table.

3. The differential pressure sensor detection calibration apparatus of claim 2, wherein: and a plurality of differential pressure sensor mounting wells for correspondingly mounting the differential pressure sensors are formed in the supporting plate.

4. The differential pressure sensor detection calibration apparatus of claim 3, wherein: at least one step is formed on an inner wall of the differential pressure sensor seating well so that the corresponding differential pressure sensor is seated on the at least one step.

5. The differential pressure sensor detection calibration apparatus of claim 4, wherein: and the calibration plate is provided with a pin fixing hole which corresponds to the differential pressure sensor mounting well and is used for fixing a pin of the differential pressure sensor.

6. The differential pressure sensor detection calibration apparatus of claim 2, wherein: the periphery of the supporting platform of the base forms an annular limiting wall so as to limit the supporting plate in an annular area limited by the annular limiting wall.

7. The differential pressure sensor detection calibration apparatus of claim 2, wherein: supporting columns are arranged on the periphery of the supporting platform of the supporting plate of the base upwards; the top of the support column supports a mounting plate; the cylinder is arranged on the mounting plate and comprises a cylinder body mounted on the mounting plate and a push rod extending out of the bottom of the cylinder body, and a connecting block fixed with the pressing plate is mounted on the push rod.

8. The differential pressure sensor detection calibration apparatus of claim 7, wherein: the bottom surface of the pressing plate is provided with a pressing column; the calibration plate is provided with a yielding pit corresponding to the compression column; the edge of the pressing plate is provided with a guide pillar, and the corresponding part on the mounting plate is provided with a guide sleeve which is in sliding fit with the guide pillar.

9. The differential pressure sensor detection calibration apparatus of claim 1, wherein: the gas supply assembly includes: the main air supply block and the side air supply blocks which are respectively and hermetically buckled at the left side and the right side of the main air supply block; a main air chamber penetrating through the main air supply block in the left-right direction and a plurality of air supply holes which are arranged at the top of the main air supply block and communicated with the main air chamber are formed in the main air supply block; a side air cabin which is formed in one direction only in the transverse direction is arranged in each side air supply block; one side air supply block is provided with an air supply port communicated with the corresponding side air chamber, and the other side air supply block is provided with an air exhaust port communicated with the corresponding side air chamber.

10. The differential pressure sensor detection calibration apparatus of claim 9, wherein: and spoilers are arranged in the side air cabins of the at least one side air supply block.

11. The differential pressure sensor detection calibration apparatus of claim 2, wherein: the periphery of the supporting platform of the supporting plate of the base is provided with an elastic support pillar assembly which comprises an accommodating sleeve fixed on the supporting platform of the supporting plate and a support pillar arranged in the accommodating sleeve in an elastic manner.

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