Electric switching pressure scanning valve

Abstract

The utility model discloses an electric switching pressure scanning valve which is characterized in that an upper cover covers the top of a bottom cover, the top of the upper cover is provided with a plurality of pressure measuring gas interfaces, a plurality of blow-off gas interfaces and a plurality of calibration gas interfaces, and a push valve, a mounting plate, a pressure sensor assembly, a conditioning circuit board, a main control circuit board and an electric switching assembly are arranged in an inner cavity of the bottom cover; the push valve is installed between the upper cover and the installation plate in a sealed mode, the push valve is connected with the electric switching assembly, multiple sets of gas paths are arranged in the push valve and correspond to the pressure measuring gas connector, the blow-off gas connector and the calibration gas connector respectively, and the push valve is driven by the electric switching assembly to slide so that the gas paths can be automatically switched; the pressure sensor assembly is in sealed connection with the mounting plate, the conditioning circuit board and the main control circuit board are arranged in a stacked mode, and the pressure sensor assembly is connected to the conditioning circuit board through a cable. The push valve switching of the pressure scanning valve is realized by adopting an electric driving mode, and the push valve switching device has the characteristics of small volume, light weight, small abrasion of a sealing element during function switching, good long-term working stability and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-channel pressure measurement, in particular to an electric switching pressure scanning valve. Background Art

[0002] A pressure scanner is an instrument capable of measuring multi-channel pressure data, typically with 8 / 16 / 32 / 64 / 128 channels. Pressure scanners with a pressure channel switching mechanism typically offer both "measurement" and "calibration / purge" functions. The "measurement" function measures pressure data from multiple pressure points in real time across multiple channels. The "calibration" function connects the pressure channel sensors to a standard gas source, using this to perform calibration across all connected channels. The "purge" function connects the pressure channel piping connecting the measured pressure points to a relatively high-pressure gas source, using this to purge excess material from the piping, preventing blockage and eliminating the impact of blockage on the "measurement" function. Before using the pressure scanner, the valve must be calibrated and the pressure channel piping must be purged to ensure accurate and reliable pressure measurement data. Therefore, quickly and reliably switching between the "measurement" and "calibration / purge" functions is crucial.

[0003] Existing pressure scanning valves are large in size and difficult to use in environments with limited space. In addition, the design of miniaturized scanning valves will cause a lot of interference to the test results due to adjacent pressure measuring channels during pressure testing, reducing the accuracy of pressure testing. At the same time, existing pressure scanning valves mainly use the "external air source pressurization + piston" method to push the multi-way switching valve core to "move linearly" to realize the switching of the "measurement" and "calibration / blowing" functions of the pressure scanning valve, which is usually called the "push valve method". The process of pushing the multi-way switching valve core requires overcoming the sliding friction of the sealing part, which wears the sealing part. After long-term and repeated use of the switching function, the pressure measuring channel of the pressure scanning valve is prone to air leakage, resulting in the failure of the "measurement" or "calibration / blowing" function of the pressure scanning valve, seriously affecting the long-term working stability of the pressure scanning valve and its application.

[0004] Therefore, how to realize a pressure scanning valve with small size, light weight, small seal wear during function switching, and good long-term working stability is one of the important problems that need to be solved urgently in this technical field. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide a pressure scanning valve which adopts an electric drive mode to realize the switching between "measurement" and "calibration / blowing" functions, and has little wear on the sealing parts during the function switching, so as to better realize long-term stable and reliable operation.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] An electric switching pressure scanning valve comprises an upper cover and a bottom cover, and a push valve, a mounting plate, a pressure sensor assembly, a conditioning circuit board, a main control circuit board and an electric switching component arranged in an inner cavity of the bottom cover;

[0008] The upper cover is closed on the top of the bottom cover, and the top of the upper cover is provided with multiple pressure measuring gas interfaces, multiple purge gas interfaces and multiple calibration gas interfaces;

[0009] The push valve is sealed and installed between the upper cover and the mounting plate. The push valve is connected to the electric switching assembly. Multiple groups of gas paths are provided in the push valve. The multiple groups of gas paths correspond to the pressure measuring gas interface, the purge gas interface and the calibration gas interface respectively. The push valve is driven to slide by the electric switching assembly to realize automatic switching of the gas paths.

[0010] The pressure sensor assembly is sealed and connected to the mounting plate, the conditioning circuit board and the main control circuit board are stacked, and the pressure sensor assembly is connected to the conditioning circuit board via a cable.

[0011] As a further improvement of the present invention, a limiting structure is provided between the upper cover, the push valve and the mounting plate. The limiting structure is distributed on both sides of the push valve to limit the sliding position of the push valve.

[0012] As a further improvement of the present invention, the limiting structure includes a fastening bolt and a spring; when the mounting plate cover is closed on the push valve, the fastening bolt passes through the spring and the mounting plate in sequence and is connected to the upper cover.

[0013] As a further improvement of the present invention, the electric switching assembly includes a push block and a drive motor. The drive motor is fixed to the bottom of the upper cover through a bracket, and the output end of the drive motor is connected to the push block. The push block is installed between the upper cover and the mounting plate, and surrounds the push valve on three sides; when the drive motor drives the push block to move back and forth, the push block drives the push valve to slide to realize automatic switching of the air circuit.

[0014] As a further improvement of the present invention, a second threaded hole is provided on the side of the push valve, and a waist hole corresponding to the second threaded hole is provided on the side of the push block; when the push valve is installed into the inner side of the push block, pins are installed in the second threaded hole and the waist hole to enable the push block to drive the push valve to slide.

[0015] As a further improvement of the present invention, a second concave cavity is provided on the bottom surface of the upper cover, and a third concave cavity is provided on the top surface of the mounting plate. Rollers are provided in both the second and third concave cavities, and the rollers are used to assist the movement of the push block.

[0016] As a further improvement of the present invention, a first groove is provided on the side of the push block, and the first groove faces the mounting plate. When the roller is in the first groove, the pressure scanning valve is in working state.

[0017] As a further improvement of the present invention, a position detection circuit board is provided on one side of the upper cover, and a probe is installed on the side of the push block. When the push block moves to a preset position, the probe triggers the photoelectric sensor on the position detection circuit board.

[0018] As a further improvement of the present invention, a power supply and communication connector and an Ethernet socket are provided on the side of the bottom cover, and both the power supply and communication connector and the Ethernet socket are connected to the main control circuit board via cables.

[0019] As a further improvement of the present invention, the air circuit in the push valve includes a pressure measuring air circuit, a blow-off air circuit and a calibration air circuit, and an air duct is provided in the mounting plate; the pressure measuring air circuit is used to connect the pressure measuring air interface and the pressure sensor assembly to realize pressure measurement; the blow-off air interface is connected to the pressure measuring air interface through the blow-off air circuit to realize the introduction of high-pressure air to purge the pressure measuring air interface; the calibration gas interface is connected to the air duct through the calibration air circuit to calibrate each pressure sensor in the pressure sensor assembly.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] 1. The electric switching pressure scanning valve of the utility model is provided with gas paths corresponding to the pressure measuring gas interface, the purge gas interface and the calibration gas interface inside the push valve, and the push valve is sealed and installed between the upper cover and the mounting plate. The push valve is connected to the electric switching component. Under the drive of the electric switching component, the push valve slides between the upper cover and the mounting plate, thereby realizing the automatic switching of the "measurement" and "calibration / purge" functions of the pressure scanning valve. Compared with the pneumatic drive method of the traditional pressure scanning valve, it reduces the dependence on supporting conditions and equipment, has higher reliability and is more convenient to use.

[0022] 2. The electric switching pressure scanning valve of the utility model is provided with rollers on the bottom surface of the upper cover and the top surface of the mounting plate. The rollers are used to assist the movement of the push block. The push block and the push valve are connected by a transmission through the cooperation of the waist hole and the pin. During the switching process between the "measurement" and "calibration / blowing" functions, the friction force on the air path seal is reduced and the wear time of the air path seal is reduced, thereby better ensuring the long-term stable and reliable operation of the pressure scanning valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 This is a schematic diagram of the appearance of an electrically switched pressure scanning valve in a specific embodiment of the present utility model;

[0025] Figure 2 This is a cross-sectional diagram of the working state of the electric switching pressure scanning valve in a specific embodiment of the present utility model;

[0026] Figure 3 This is a cross-sectional schematic diagram of the unlocked state of the electric switching pressure scanning valve in a specific embodiment of the present utility model;

[0027] Figure 4 This is a cross-sectional diagram of the push valve state of the electric switching pressure scanning valve in a specific embodiment of the present utility model;

[0028] Figure 5 This is a cross-sectional diagram of a calibration state of an electric switching pressure scanning valve in a specific embodiment of the present utility model;

[0029] Figure 6 This is a schematic diagram of the internal structure of the electric switching pressure scanning valve in a specific embodiment of the present utility model;

[0030] Figure 7 This is a cross-sectional diagram of the blow-off airway of the electric switching pressure scanning valve in a specific embodiment of the utility model.

[0031] Figure 8 This is a schematic cross-sectional view of a calibration airway of an electrically switched pressure scanning valve in a specific embodiment of the present utility model;

[0032] Figure 9 These are three views of the upper cover of the electric switching pressure scanning valve in a specific embodiment of the present utility model; wherein, Figure (a) is a bottom view, Figure (b) is a left view, and Figure (c) is a front view;

[0033] Figure 10 This is a schematic diagram of a push valve of an electrically switched pressure scanning valve in a specific embodiment of the present utility model;

[0034] Figure 11 This is a schematic side view of a push valve of an electrically switched pressure scanning valve in a specific embodiment of the present utility model;

[0035] Figure 12 The push valve of the electric switching pressure scanning valve in the specific embodiment of the utility model is shown in FIG. Figure 11 The cross-sectional view along the AA direction is shown in Figure (b). Figure 11 The cross-sectional view along the BB direction, Figure (c) is Figure 11 The cross-sectional view along the DD direction is shown in Figure (d). Figure 11 Cross-sectional view along the EE direction;

[0036] Figure 13Three views of the push block of the electric switching pressure scanning valve in a specific embodiment of the present utility model; wherein, Figure (a) is a front view, Figure (b) is a left view, and Figure (c) is a top view;

[0037] Figure 14 Schematic diagram of the sensor mounting plate of the electric switching pressure scanning valve in a specific embodiment of the present utility model; wherein Figure (a) is a front view, Figure (b) is a top view, and Figure (c) is a schematic diagram of the structure at Q in Figure (a);

[0038] Figure 15 This is a schematic diagram of a pressure sensor assembly of an electrically switched pressure scanning valve in a specific embodiment of the present utility model;

[0039] Figure 16 This is a schematic diagram of the bottom cover of the electric switching pressure scanning valve in a specific embodiment of the present utility model;

[0040] Figure 17 This is a schematic diagram of a roller of an electrically switched pressure scanning valve in a specific embodiment of the present utility model;

[0041] Figure 18 This is a schematic diagram of a bracket for an electrically switched pressure scanning valve in a specific embodiment of the present utility model;

[0042] Figure 19 This is a schematic diagram of a motor for an electrically switched pressure scanning valve in a specific embodiment of the present utility model;

[0043] Figure 20 This is a schematic cross-sectional view of the pressure measuring airway of the electric switching pressure scanning valve in a specific embodiment of the present utility model;

[0044] Figure 21 This is a schematic diagram of a position detection circuit board for an electrically switched pressure scanning valve in a specific embodiment of the present utility model;

[0045] Figure 22 This is a schematic diagram of the position of the roller at the bottom of the first groove during the switching process of the electric switching pressure scanning valve in a specific embodiment of the present utility model;

[0046] Figure 23 This is a schematic diagram of the position of the roller at the first groove slope during the switching process of the electric switching pressure scanning valve in a specific embodiment of the present utility model;

[0047] Figure 24 This is a schematic diagram of the position of the roller outside the first groove during the switching process of the electric switching pressure scanning valve in a specific embodiment of the present utility model.

[0048] Legend: 1. Upper cover; 1001. Pressure measuring gas interface; 1002. Blow-off gas interface; 1003. Calibration gas interface; 1004. First annular groove; 1005. First cavity; 1006. First threaded hole; 1007. First threaded boss; 1008. Second threaded boss; 1009. Second cavity; 1010. Mounting flange; 1011. First slideway; 2. Push valve; 2001. Pressure measuring gas path; 2002. Blow-off gas path; 2003. Calibration gas path; 2004. Boss; 2005. Second threaded hole; 3. Push block; 3001. First groove; 3002. Waist hole; 3003. Motor shaft hole; 3004. Probe; 4. Mounting plate; 4001. Third threaded hole; 4002. Second annular groove; 4003. Air duct; 4004. Through hole; 4 005, third concave cavity; 4006, second slide groove; 5, pressure sensor assembly; 5001, connecting thread; 6, bottom cover; 6001, third threaded boss; 6002, first mounting position; 6003, second mounting position; 6004, fourth threaded hole; 6005, external mounting flange hole; 7, pin; 8, roller; 9, bracket; 9001, bracket mounting flange; 9002, motor mounting flange; 10, drive motor; 10001, threaded shaft; 10002, fifth threaded hole; 11, conditioning circuit board; 12, main control circuit board; 13, fastening bolt; 14, spring; 15, fastener; 16, position detection circuit board; 16001, side sensor; 16002, center position sensor; 17, power supply and communication connector; 18, Ethernet socket; 19, seal. DETAILED DESCRIPTION

[0049] The following describes the embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. Figures 1 to 24 The described embodiments are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0050] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0052] In this utility model, unless otherwise expressly specified or limited, the terms "install," "connect," "connect," "fix," "mount," and the like should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0053] Example

[0054] like Figure 1 、 Figure 2 and Figure 3 As shown, the electric switching pressure scanning valve of the present invention includes an upper cover 1 and a bottom cover 6, as well as a push valve 2, a mounting plate 4, a pressure sensor assembly 5, a conditioning circuit board 11, a main control circuit board 12 and an electric switching component arranged in the inner cavity of the bottom cover 6.

[0055] like Figure 9 As shown, a mounting flange 1010 is provided on the side of the upper cover 1. Figure 16 As shown, the side of the bottom cover 6 is provided with a fourth threaded hole 6004. By screwing the fastener 15 into the mounting flange 1010 and the fourth threaded hole 6004, the upper cover 1 is covered on the top of the bottom cover 6. The top of the upper cover 1 is provided with multiple pressure measuring gas interfaces 1001, multiple purge gas interfaces 1002 and multiple calibration gas interfaces 1003. Figure 9 As shown, the air duct outlet at the bottom of the upper cover 1 is provided with a first annular groove 1004 for installing the sealing member 19 .

[0056] The push valve 2 is sealed and installed between the upper cover 1 and the mounting plate 4. The push valve 2 is connected to the electric switching component, and multiple groups of air paths are provided in the push valve 2. The multiple groups of air paths correspond to the pressure measuring air interface 1001, the blow-off air interface 1002 and the calibration gas interface 1003 respectively. The push valve 2 is driven to slide by the electric switching component to realize automatic switching of the air paths.

[0057] like Figure 7 、 Figure 8 、 Figure 14 and Figure 15As shown, one side of the mounting plate 4 is provided with multiple third threaded holes 4001 for mounting the sensor assembly 5. Air ducts 4003 are located at the bottom of the third threaded holes 4001. Another side of the mounting plate 4 is provided with multiple second annular grooves 4002, concentric with the air ducts 4003, for mounting the seal 19. Connecting threads 5001 are provided on the outside of the sensor assembly 5, matching the third threaded holes 4001. The sensor assembly 5 is threadedly mounted on the mounting plate 4 and sealed by the seal 19.

[0058] like Figure 5 and Figure 16 As shown, the conditioning circuit board 11 and the main control circuit board 12 are stacked, the main control circuit board 12 is mounted on the third threaded boss 6001 of the bottom cover 6 via fasteners 15, and the pressure sensor assembly 5 is connected to the conditioning circuit board 11 via a cable.

[0059] In this embodiment, by providing air paths corresponding to the pressure measuring air interface 1001, the purge air interface 1002 and the calibration air interface 1003 inside the push valve 2, and sealingly installing the push valve 2 between the upper cover 1 and the mounting plate 4, the push valve 2 is connected to the electric switching component. Under the drive of the electric switching component, the push valve 2 slides between the upper cover 1 and the mounting plate 4, thereby realizing the automatic switching of the "measurement" and "calibration / purge" functions of the pressure scanning valve. Compared with the pneumatic drive method of the traditional pressure scanning valve, it reduces the dependence on supporting conditions and equipment, has higher reliability, and is more convenient to use.

[0060] like Figure 10 、 Figure 11 and Figure 12 As shown, the air circuit in the push valve 2 includes a pressure measuring air circuit 2001, a blow-off air circuit 2002 and a calibration air circuit 2003; the pressure measuring air circuit 2001 is used to connect the pressure measuring air interface 1001 and the pressure sensor assembly 5 to realize pressure measurement; the blow-off air interface 1002 is connected to the pressure measuring air interface 1001 through the blow-off air circuit 2002 to realize the introduction of high-pressure air to purge the pressure measuring air interface 1001; the calibration gas interface 1003 is connected to the air duct 4003 through the calibration air circuit 2003 to calibrate each pressure sensor in the pressure sensor assembly 5.

[0061] In this embodiment, a limiting structure is provided between the upper cover 1 , the push valve 2 and the mounting plate 4 . The limiting structure is distributed on both sides of the push valve 2 to limit the sliding position of the push valve 2 .

[0062] like Figure 5 and Figure 6 As shown, the limiting structure includes a fastening bolt 13 and a spring 14. When the mounting plate 4 is covered on the push valve 2, the fastening bolt 13 passes through the spring 14 and the mounting plate 4 in sequence and is connected to the upper cover 1.

[0063] like Figure 6 、 Figure 9 and Figure 14 As shown, the mounting plate 4 is placed on the push valve 2, with fastening bolts 13 passing through the spring 14 and the through holes 4004 at the four corners of the mounting plate 4, and fixed to the first threaded boss 1007 of the upper cover 1. At this time, if the roller 8 on the mounting plate 4 is exactly at the bottom of the first groove 3001 of the front extension arm of the push block 3, the spring 14 will apply a locking force to the push valve 2 through the mounting plate 4 and the upper cover 1. The upper cover 1 has first sliding grooves 1011 on both sides of the bottom to guide and limit the push valve 2. The mounting plate 4 has second sliding grooves 4006 on both sides of the top surface to guide and limit the push valve 2. Furthermore, a set of bosses 2004 are provided on both sides of the top and bottom surfaces of the push valve 2 to cooperate with the first sliding groove 1011 of the upper cover 1 and the second sliding groove 4006 of the mounting plate 4.

[0064] like Figure 3 、 Figure 4 and Figure 5 As shown, the electric switching assembly includes a push block 3 and a drive motor 10. Figure 9 As shown, a first cavity 1005 is provided in the upper cover 1, and a first threaded hole 1006 is provided in the first cavity 1005 for installing the bracket 9. Figure 18 As shown, the bracket 9 includes a bracket mounting flange 9001 and a motor mounting flange 9002 that are perpendicular to each other. The bracket 9 is fixed to the upper cover 1 by screwing the fastener 15 into the first threaded hole 1006 and the bracket mounting flange 9001. Figure 19 As shown, the drive motor 10 is provided with a threaded shaft 10001 and a fifth threaded hole 10002. By screwing a fastener 15 into the motor mounting flange 9002 and the fifth threaded hole 10002, the bracket 9 is connected and fixed to the drive motor 10. The threaded shaft 10001 is located at the output end of the drive motor 10. The threaded shaft 10001 is connected to the motor shaft hole 3003 on the crossbeam of the push block 3 to connect and fix the push block 3 to the drive motor 10. Furthermore, the push block 3 is installed between the upper cover 1 and the mounting plate 4, and the push block 3 is in a "concave" shape, surrounding the push valve 2 on three sides; when the drive motor 10 drives the push block 3 to move back and forth, the push block 3 drives the push valve 2 to slide left and right to achieve automatic switching of the air path.

[0065] like Figure 10 As shown, the side of the push valve 2 is provided with a second threaded hole 2005, and the side of the push block 3 is provided with a waist hole 3002 corresponding to the second threaded hole 2005. When the push valve 2 is installed inside the push block 3, a pin 7 is installed in the second threaded hole 2005 and the waist hole 3002 to enable the push block 3 to drive the push valve 2 to slide.

[0066] like Figure 9 、 Figure 14 and Figure 17As shown, the bottom surface of the upper cover 1 is provided with a second cavity 1009, and the top surface of the mounting plate 4 is provided with a third cavity 4005. Both the second cavity 1009 and the third cavity 4005 are provided with rollers 8, which assist in the movement of the push block 3. In this embodiment, a slight gap is maintained between the push block 3 and the push valve 2. The push block 3 contacts the rollers 8 on the upper cover 1 and the mounting plate 4, allowing for flexible left and right sliding.

[0067] like Figure 13 As shown, a first groove 3001 is defined on the side of the push block 3. This groove 3001 faces the mounting plate 4. When the roller 8 is within the first groove 3001, the pressure scanning valve is in operation. Specifically, a set of first grooves 3001 is defined on the top surfaces of the two sets of front extension arms of the push block 3. The push block 3 is moved by the drive motor 10. When the roller 8 of the mounting plate 4 is within the first groove 3001, the mounting plate 4, under the force of the spring 14, presses against the push valve 2. When the roller 8 is outside the first groove 3001, the mounting plate 4 is lifted, and the push valve 2 is unlocked.

[0068] like Figure 6 As shown, a position detection circuit board 16 is provided on one side of the upper cover 1, and a probe 3004 is provided on the side of the front arm of the push block 3. When the push block 3 moves to the preset position, the probe 3004 triggers the photoelectric sensor on the position detection circuit board 16.

[0069] Furthermore, if Figure 21 As shown, the photoelectric sensors on the position detection circuit board 16 include a side sensor 16001 and a center sensor 16002. The side sensors 16001 are symmetrically arranged on both sides of the center sensor 16002. The side sensors 16001 are used to detect whether the push valve 2 is in the restricted position, and the center sensor 16002 is used to detect whether the push valve 2 is locked.

[0070] like Figure 3 As shown, when the driving motor 10 drives the push block 3 to move to the right, the roller 8 in the mounting plate 4 is moved out of the first groove 3001, the mounting plate 4 is separated from the push valve 2, the push valve 2 is unlocked, and at the same time, the pin 7 contacts the left side of the waist hole 3002 of the push block 3.

[0071] like Figure 4 and Figure 21 As shown, when the drive motor 10 continues to drive the push block 3 to move to the right, the left edge of the waist hole 3002 will push the pin 7, thereby moving the push valve 2 to the right. When the push valve 2 moves to the specified position, the probe 3004 will trigger the side sensor 16001 on the position detection circuit board 16, causing the drive motor 10 to reverse.

[0072] like Figure 5 、 Figure 20 and Figure 21As shown, after the drive motor 10 reverses, the waist hole 3002 disengages the pin 7. When the roller 8 returns to the first groove 3001, the spring 14 presses the mounting plate 4 against the push valve 2. The probe 3004 triggers the center position sensor 16002 on the position detection circuit board 16, and the motor 10 stops. At this point, the pressure measurement air path 2001 in the push valve 2 connects to the pressure measurement interface 1001 and the air duct 4003, and the pressure scanning valve is in operation.

[0073] like Figure 1 、 Figure 6 and Figure 16 As shown, the side of the bottom cover 6 is provided with a first mounting position 6002 for mounting the power supply connector 17, and a second mounting position 6003 for mounting the Gigabit Ethernet socket 18. The power supply communication connector 17 and the Ethernet socket 18 are both connected to the main control circuit board 12 via cables.

[0074] In this embodiment, the side of the front extension arm of the push block 3 is provided with a waist hole 3002, into which a pin 7 on the side of the push valve 2 is positioned. When the mounting plate 4 is lifted, the ends of the waist hole 3002 contact the pin 7. At this point, continuing to push the push block 3 in the same direction will cause the push valve 2 to move. When the push valve 2 is in the restricted position, a probe 3004 mounted on the push block 3 triggers one of the two side sensors 16001 on the position detection circuit board 16. At this point, the drive motor 10 is controlled by a command to retract the push block 3. During retraction, the waist hole 3002 first disengages from the pin 7. At this point, the push valve 2 remains in position until the roller 8 of the mounting plate 4 returns to the first groove 3001. The probe 3004 then triggers the center position sensor 16002, causing the drive motor 10 to stop operating. At this point, the push valve 2 is locked. The push valve 2 is automatically unlocked, locked and moved by the first groove 3001 and the waist hole 3002 on the push block 3, realizing automatic switching between the "measurement" and "calibration / blowing" functions, and improving the convenience of using the pressure scanning valve.

[0075] like Figure 22 、 Figure 23 and Figure 24 As shown, in this embodiment, the driving motor 10 of the pressure scanning valve can generate a thrust of F1. Four springs 14 are provided in the pressure scanning valve, each with a spring force of F2. The angle between the tangent line at the contact point between the roller 8 and the first groove 3001 and the side edge of the push block 3 is θ, and the friction coefficient between the roller 8 and the first groove 3001 is u (0≤u<1). If the thrust F1 generated by the driving motor 10 satisfies the condition: F1 ≥ 4×F2×sinθ+4×F2×cosθ×u, the driving motor 10 can drive the push valve 2 to switch between the "measurement" and "calibration / purge" functional states of the pressure scanning valve.

[0076] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An electrically switched pressure scanning valve, characterized in that: It comprises an upper cover (1) and a bottom cover (6), as well as a push valve (2), a mounting plate (4), a pressure sensor assembly (5), a conditioning circuit board (11), a main control circuit board (12) and an electric switching component arranged in the inner cavity of the bottom cover (6); The upper cover (1) is covered on the top of the bottom cover (6), and the top of the upper cover (1) is provided with a plurality of pressure measuring gas interfaces (1001), a plurality of purge gas interfaces (1002) and a plurality of calibration gas interfaces (1003); The push valve (2) is sealed and installed between the upper cover (1) and the mounting plate (4). The push valve (2) is connected to the electric switching assembly. A plurality of gas paths are provided in the push valve (2). The plurality of gas paths correspond to the pressure measuring gas interface (1001), the blow-off gas interface (1002) and the calibration gas interface (1003) respectively. The push valve (2) is driven to slide by the electric switching assembly to realize automatic switching of the gas paths. The pressure sensor assembly (5) is sealedly connected to the mounting plate (4), the conditioning circuit board (11) and the main control circuit board (12) are stacked, and the pressure sensor assembly (5) is connected to the conditioning circuit board (11) via a cable.

2. The electrically switched pressure scanning valve according to claim 1, characterized in that: A limiting structure is provided between the upper cover (1), the push valve (2) and the mounting plate (4), and the limiting structure is distributed on both sides of the push valve (2) to limit the sliding position of the push valve (2).

3. The electrically switched pressure scanning valve according to claim 2, characterized in that: The limiting structure includes a fastening bolt (13) and a spring (14); when the mounting plate (4) is covered on the push valve (2), the fastening bolt (13) passes through the spring (14) and the mounting plate (4) in sequence and is connected to the upper cover (1).

4. The electrically switched pressure scanning valve according to claim 2, characterized in that: The electric switching assembly comprises a push block (3) and a drive motor (10), wherein the drive motor (10) is fixed to the bottom of the upper cover (1) via a bracket (9), and the output end of the drive motor (10) is connected to the push block (3), and the push block (3) is installed between the upper cover (1) and the mounting plate (4), and surrounds the push valve (2) on three sides; when the drive motor (10) drives the push block (3) to move back and forth, the push block (3) drives the push valve (2) to slide, thereby realizing automatic switching of the gas path.

5. The electrically switched pressure scanning valve according to claim 4, characterized in that: The push valve (2) is provided with a second threaded hole (2005) on the side, and the push block (3) is provided with a waist hole (3002) corresponding to the second threaded hole (2005) on the side; when the push valve (2) is installed inside the push block (3), a pin (7) is installed in the second threaded hole (2005) and the waist hole (3002) to enable the push block (3) to drive the push valve (2) to slide.

6. The electrically switched pressure scanning valve according to claim 5, characterized in that: The bottom surface of the upper cover (1) is provided with a second concave cavity (1009), and the top surface of the mounting plate (4) is provided with a third concave cavity (4005). Rollers (8) are provided in both the second concave cavity (1009) and the third concave cavity (4005), and the rollers (8) are used to assist the movement of the push block (3).

7. The electrically switched pressure scanning valve according to claim 6, characterized in that: A first groove (3001) is provided on the side of the push block (3), and the first groove (3001) faces the mounting plate (4). When the roller (8) is in the first groove (3001), the pressure scanning valve is in a working state.

8. The electrically switched pressure scanning valve according to any one of claims 4 to 7, characterized in that: A position detection circuit board (16) is provided on one side of the upper cover (1), and a probe (3004) is installed on the side of the push block (3). When the push block (3) moves to a preset position, the probe (3004) triggers a photoelectric sensor on the position detection circuit board (16).

9. The electrically switched pressure scanning valve according to any one of claims 1 to 7, characterized in that: A power supply and communication connector (17) and an Ethernet socket (18) are provided on the side of the bottom cover (6), and both the power supply and communication connector (17) and the Ethernet socket (18) are connected to the main control circuit board (12) via cables.

10. The electrically switched pressure scanning valve according to any one of claims 1 to 7, characterized in that: The air circuit in the push valve (2) comprises a pressure measuring air circuit (2001), a purge air circuit (2002) and a calibration air circuit (2003); an air inlet duct (4003) is provided in the mounting plate (4); the pressure measuring air circuit (2001) is used to connect the pressure measuring air interface (1001) and the pressure sensor assembly (5) to achieve pressure measurement; the purge air interface (1002) is connected to the pressure measuring air interface (1001) via the purge air circuit (2002) to enable high-pressure air to be introduced to purge the pressure measuring air interface (1001); the calibration air interface (1003) is connected to the air inlet duct (4003) via the calibration air circuit (2003) to calibrate each pressure sensor in the pressure sensor assembly (5).

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