CN111879462B - Pressure transmitter with modular structure - Google Patents

Abstract

The invention relates to a pressure transmitter with a modular structure, which comprises a cylindrical main shell, wherein a partition plate, a threading shell, a cylindrical mounting seat, a front lens cover and a rear cover are arranged on the main shell; the partition board is provided with a through hole group, a fixing screw hole, an installation screw hole group, a lower through groove and an upper through groove; a wiring terminal, a signal processing mechanism and a screen display mechanism are fixedly arranged in the main shell; the mount pad internal fixation is equipped with pressure sensitive mechanism, and pressure sensitive mechanism includes the fixed subassembly of constituteing by first electric capacity board, second electric capacity board. The pressure transmitter with the modular structure has the modular structure, so that the fault part is easy to replace; meanwhile, two groups of pressure sensitive elements realize one use and one standby and are self-regulated.

Description

Pressure transmitter with modular structure

Technical Field

The invention relates to the technical field of pressure detection, in particular to a pressure transmitter with a modular structure.

Background

The pressure sensor is a device or apparatus that senses a pressure signal, converts the pressure signal into a detectable electrical signal according to a specification, and outputs the electrical signal. The pressure sensor consists of a pressure sensitive element and a signal processing unit. Pressure sensors can be classified into gauge pressure sensors, differential pressure sensors, and absolute pressure sensors according to different types of test pressures. The pressure sensor is the most common sensor in industrial practice, is widely applied to various industrial automatic control environments, relates to water conservancy and hydropower, railway traffic, intelligent buildings, production automatic control, aerospace, military industry, petrochemical industry, oil wells, electric power, ships, machine tools, pipelines and other industries, and simply introduces the principles and the applications of some common sensors. There are also more sophisticated medical pressure sensors.

The pressure transmitter is a device for converting pressure into pneumatic signal or electric signal for control and remote transmission. The pressure sensor can convert physical pressure parameters such as gas and liquid sensed by the pressure element sensor into standard electric signals, namely, the pressure sensor is electrodynamic, and unified output signals of the pressure sensor are direct-current electric signals of 0-10 mA, 4-20 mA or 1-5V, 0-5V and 0-10V so as to supply secondary instruments such as an indication alarm instrument, a recorder and a regulator for measurement, indication and process regulation. The pressure transmitter is the most common sensor in industrial practice, is widely applied to various industrial automatic control environments, and relates to various industries such as water conservancy and hydropower, railway traffic, intelligent buildings, production automatic control, aerospace, military industry, petrochemical industry, oil wells, electric power, ships, machine tools, pipelines and the like.

However, in practical use of the conventional pressure transmitter, the following disadvantages still exist:

1. the pressure sensitive element and the signal processing unit in the explosion-proof shell are of an integral structure and are not easy to maintain;

2. the pressure sensitive element is a single component and can only be replaced when a fault occurs.

Disclosure of Invention

In order to solve the technical problems in the background art, the invention provides a pressure transmitter with a modular structure, which is easy to replace a fault part; meanwhile, two groups of pressure sensitive elements realize one use and one standby and are self-regulated.

The technical scheme adopted by the invention is as follows:

the utility model provides a pressure transmitter with modular structure, includes the main casing body of tube-shape that sets up along the fore-and-aft direction, the middle part of the main casing body is provided with the baffle, the baffle separates the main casing body for two parts around being used for wiring, observation/debugging respectively, and the upper portion of the main casing body is provided with the threading casing along the left right direction, and the lower part of the main casing body is provided with the tube-shape mount pad along the vertical direction, and the observation/debugging end seal of the main casing body is provided with the front lens lid, and the wiring end.

The central authorities of baffle run through and are provided with the perforation group, the perforation group sets up side by side along left right direction, and the left and right both sides of perforation group run through and are provided with fixed screw, and the baffle is provided with installation screw group, lower logical groove towards the one side of main casing body observation/debugging end, and the baffle is provided with the last logical groove that is linked together with the threading casing towards one side of main casing body wiring end.

The wiring end internal fixation of the main casing body is provided with binding post, binding post's rear end is provided with and perforates the group of the jack of organizing the common central axis, the jack group respectively with each terminal electric connection of binding post, the left and right both sides of jack group run through be provided with the fixed screw hole common central axis's through-hole.

The observation/debugging of the main casing body is served and is provided with signal processing mechanism, screen display mechanism by backward preceding fixed connection in proper order: the signal processing mechanism comprises a main board, wherein a pin header and a foot-cushion nut are arranged on the front end face of the main board, a first pin header and a second pin header are arranged on the rear end face of the main board, the first pin header is electrically connected with a jack group in an inserting mode, open first through grooves are arranged on the left side and the right side of the middle of the main board in a penetrating mode, and mounting holes which share the same central axis with the mounting screw hole group are arranged on the main board in a penetrating mode; the screen display mechanism comprises a main shell, a display screen and a plurality of buttons are arranged on the front end face of the main shell, the display screen is arranged right behind the front lens cover, a fixing hole which shares a central axis with the foot-padding nut is arranged right below the display screen in a penetrating mode, a third row of pins which are electrically connected with the needle-arranging base in a penetrating mode are arranged on the rear end face of the main shell, and open second penetrating grooves are arranged on the left side and the right side of the middle of the main shell in a penetrating mode; the first through groove and the second through groove are internally inserted with a foot-pad limiting rod screwed in the fixed screw hole.

The mount pad internal fixation is provided with pressure-sensitive mechanism, pressure-sensitive mechanism is including being used for the fixed subassembly of spiro union in the mount pad, fixed subassembly internal fixation is provided with the electric capacitor assembly who pegs graft with signal processing mechanism, capacitor assembly includes the same and parallel arrangement's of two sets of structures first capacitor plate, second capacitor plate, first capacitor plate, second capacitor plate interpolation are equipped with the trigger subassembly, the trigger subassembly is sealed and slides poor and locate in the fixed subassembly.

Furthermore, one of the left end and the right end of the threading shell is provided with a sealing cover in a sealing mode, the sealing cover is in threaded connection with the threading shell, and a groove in the shape of a Chinese character 'yi' is formed in the outer portion of the sealing cover so that the sealing cover can be installed or detached conveniently.

Furthermore, the jack groups protrude out of the front end face of the wiring terminal and are respectively inserted into the through hole groups.

Further, fixed subassembly is including the tubbiness upper shell that is provided with the external screw thread, the last top of upper shell is provided with the socket, the socket sets up forward, is convenient for arrange the electrical grafting of needle with the second, and the symmetry is provided with the fixed cassette of "W" style of calligraphy on the inner wall of upper shell, and the end of going to the bottom of upper shell is provided with the mounting nut, the central authorities of mounting nut run through along the vertical direction and are provided with spacing spout, and the end of going to the bottom of mounting nut is provided with tubbiness lower shell, the shell is provided with the external screw thread that is used for installing fixedly down, and the end of going to the bottom of lower shell runs.

Furthermore, the capacitor assembly comprises a first capacitor plate and a second capacitor plate which are inserted into the fixed clamping seat and have the same structure and are arranged in parallel, the capacitor assembly comprises a main plate and a standby plate which are arranged in a coplanar manner, an insulating strip is connected and arranged between the main plate and the standby plate, a first connecting terminal is electrically connected to the main plate, a second connecting terminal is electrically connected to the standby plate, and the first connecting terminal and the second connecting terminal are electrically connected.

Further, the trigger assembly comprises a dielectric plate inserted between the first capacitor plate and the second capacitor plate, a limiting slide bar is fixedly connected to the lower end of the dielectric plate, the limiting slide bar is slidably inserted into the limiting chute, a sealing slide bar is fixedly connected to the lower end of the limiting slide bar, a limiting plate larger than the outer diameter of the sealing slide bar is fixedly connected to the middle of the sealing slide bar, a reset spring sleeved on the sealing slide bar is arranged on the limiting plate in a butting mode, the upper end of the reset spring is abutted to the lower bottom end face of the mounting nut, a concave pressure head is arranged at the lower end of the sealing slide bar, and a plurality of sealing rings are sleeved on the sealing slide bar between the pressure head and the limiting plate and are slidably inserted into the sealing slide bar.

A method of assembling a pressure transmitter having a modular construction, comprising:

A. installing a pressure-sensitive mechanism:

the opening of the mounting seat of the main shell is upward, the main shell is fixed by clamping a workpiece, the upper shell with external threads is screwed onto the internal threads of the mounting seat of the main shell until the socket is exposed from the lower through groove of the observation/debugging end of the main shell, the mounting nut is rotated clockwise by a wrench to enable the socket to be abutted against the bottom of the lower through groove, and then the mounting nut is rotated counterclockwise by the wrench to enable the socket to be rotated to the forward position;

B. installing a wiring terminal:

rotating the clamping workpiece to enable the wiring end of the main shell to be opened upwards, inserting the jack group bulges arranged on the wiring terminal into the through hole groups respectively, and screwing the screw arranged in the through hole into the fixed screw hole so as to reliably fix the wiring terminal in the main shell;

C. installing a signal processing mechanism:

rotating the clamping workpiece to enable the opening of the observation/debugging end of the main shell to be upward, screwing the foot-padding limiting rod into the fixed screw hole, placing the main board on which the foot-padding nut is fixed into the observation/debugging end of the main shell, sleeving the first through groove on the foot-padding limiting rod, simultaneously respectively inserting the first row of pins into the jack groups in the jack groups, inserting the second row of pins into the socket, inserting the screw into the mounting hole, and screwing the screw into the mounting screw hole group, thereby reliably fixing the signal processing mechanism in the main shell;

D. installing a screen display mechanism:

the screen display mechanism is placed in the observation/debugging end of the main shell, the second penetrating groove is sleeved on the foot pad limiting rod, meanwhile, the third row of pins are inserted into the pin header, and screws are respectively screwed on the foot pad nut and the foot pad limiting rod, so that the screen display mechanism is reliably fixed in the main shell;

E. debugging:

the workpiece is clamped in a rotating mode, the opening of the mounting seat of the main shell is downward, the metal hose with the inner thread is screwed to the lower shell with the outer thread, the metal hose is communicated with the constant-voltage system, the wiring terminal is electrically connected with the power supply and the testing unit, the signal processing mechanism is initialized, and the zero point and the measuring range of the pressure transmitter are verified through the display screen and the buttons arranged on the screen display mechanism.

Further, the assembling method further comprises a detection method:

the display screen displays the power supply state and the working state of the signal processing mechanism, the screen display mechanism and the pressure-sensitive mechanism, so that fault points are checked;

meanwhile, the corresponding module is replaced through the checking structure.

The pressure transmitter with the modular structure has the advantages that:

1. the wiring terminal, the signal processing mechanism, the screen display mechanism and the pressure-sensitive mechanism which are fixedly arranged in the main shell are all of modular electrical plug-in structures, so that the assembly and disassembly are convenient, when a fault occurs, the fault can be replaced, and the maintenance process is simple;

2. the capacitor assembly consists of a first capacitor plate and a second capacitor plate, one capacitor plate is used for the other capacitor plate, and the switching is realized through the signal processing mechanism.

Drawings

In order to more clearly illustrate the embodiments of the present invention, reference will now be made in brief to the accompanying drawings, which are needed in the description, and in which embodiments of the present invention are illustrated.

FIG. 1 is a general exploded perspective view of a pressure transmitter having a modular construction according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a front view of a main housing of a pressure transmitter having a modular construction according to an embodiment of the present invention;

FIG. 3 is a schematic rear view of a main housing of a pressure transmitter having a modular construction according to an embodiment of the present invention;

FIG. 4 is a partially enlarged schematic illustration of a pressure transmitter having a modular construction according to an embodiment of the present invention;

FIG. 5 is a partial schematic illustration of a pressure transmitter having a modular construction according to an embodiment of the present invention;

FIG. 6 is a schematic diagram showing a third embodiment of the present invention in an enlarged partial view of a pressure transmitter having a modular construction;

FIG. 7 is an exploded view of a pressure sensitive mechanism of a pressure transmitter having a modular construction according to an embodiment of the present invention.

In the figure:

10. a main shell body 11, a clapboard 12, a threading shell body 13, a mounting seat 14, a front lens cover 15, a rear cover,

111. a through hole group 112, a fixing screw hole 113, an installation screw hole group 114, a lower through groove 115, an upper through groove 121, a sealing cover,

2. a wiring terminal 3, a signal processing mechanism 4, a screen display mechanism 5, a pressure sensitive mechanism 6, a foot pad limiting rod,

21. a through hole 22, a group of plug holes,

30. a main board, 31, a pin arranging base, 32, a foot-cushion nut, 33, a first through groove, 34, a first pin arranging base, 35, a second pin arranging base, 36 and a mounting hole,

40. a main shell 41, a display screen 42, a fixing hole 43, a button 44, a second through groove 45, a third row of needles,

51. a fixed component 511, an upper shell 512, a socket 513, a fixed clamping seat 514, a mounting nut 515, a limit sliding groove 516, a lower shell 517 and a sealing sliding hole,

52. a capacitor assembly 520-a, a first capacitor plate 520-B, a second capacitor plate 521, a main plate 522, a standby plate 523, an insulating bar 524, a first connection terminal 525, a second connection terminal,

53. the device comprises a trigger assembly 531, a dielectric plate 532, a limit slide rod 533, a sealing slide rod 534, a limit plate 535, a return spring 536, a pressure head 537 and a sealing ring.

Detailed Description

In order to clearly and clearly illustrate the specific implementation objects and the implementation modes of the invention, the technical scheme of the invention is completely described below, and the described examples are a part of the examples of the invention, but not all the examples. All other embodiments based on the described embodiments of the invention are within the scope of the invention without making creative efforts.

The invention relates to a pressure transmitter with a modular structure, as shown in figure 1, comprising: the main casing body 10 of tube-shape that sets up along the fore-and-aft direction, the middle part of the main casing body 10 is provided with baffle 11, baffle 11 separates the main casing body 10 for two parts around being used for wiring, observation/debugging respectively, and the upper portion of the main casing body 10 is provided with threading casing 12 along the left right direction, one of both ends is located sealedly and is provided with closing cap 121 about threading casing 12, closing cap 121 and threading casing 12 threaded connection, the outside of closing cap 121 is provided with the recess of "a" word form to install or demolish closing cap 121 in convenient for. A cylindrical mounting base 13 is provided in a vertical direction at a lower portion of the main housing 10, a front lens cover 14 is hermetically provided at an observation/debugging end portion of the main housing 10, and a rear cover 15 is hermetically provided at a terminal portion of the main housing 10.

As shown in fig. 2 and 3, a through hole group 111 is provided through the center of the partition 11, the through hole group 111 is provided side by side along the left and right direction, fixing screw holes 112 are provided through the left and right sides of the through hole group 111, an installation screw hole group 113 and a lower through groove 114 are provided on the side of the partition 11 facing the observation/debugging end of the main housing 10, and an upper through groove 115 communicating with the threading housing 12 is provided on the side of the partition 11 facing the terminal of the main housing 10.

As shown in fig. 1, a connection terminal 2 is fixedly disposed in the terminal of the main housing 10, as shown in fig. 4, a jack group 22 having a central axis common to the through hole group 111 is disposed at the rear end of the connection terminal 2, and the jack groups 22 protrude from the front end surface of the connection terminal 2 and are respectively inserted into the through hole groups 111. The plug hole group 22 is electrically connected to each terminal of the terminal block 2, and through holes 21 having a common central axis with the fixing screw hole 112 are formed through both left and right sides of the plug hole group 22.

As shown in fig. 1, a signal processing mechanism 3 and a screen display mechanism 4 are fixedly connected to the observation/debugging end of the main housing 10 from back to front: as shown in fig. 5 and 6, the signal processing mechanism 3 includes a main board 30, a pin header 31 and a foot nut 32 are disposed on a front end surface of the main board 30, a first pin header 34 and a second pin header 35 are disposed on a rear end surface of the main board 30, the first pin header 34 is electrically connected with the jack group 22, open first through grooves 33 are disposed on left and right sides of a middle portion of the main board 30 in a penetrating manner, and a mounting hole 36 having a central axis common to the mounting screw group 113 is disposed on the main board 30 in a penetrating manner; as shown in fig. 5 and 6, the screen display mechanism 4 includes a main casing 40, a display screen 41 and a plurality of buttons 43 are arranged on a front end surface of the main casing 40, the display screen 41 is arranged right behind the front lens cover 14, a fixing hole 42 having a central axis common to the base nut 32 is arranged right below the display screen 41 in a penetrating manner, a third row of pins 45 electrically connected with the base pin 31 is arranged on a rear end surface of the main casing 40, and open second penetrating grooves 44 are arranged on left and right sides of the middle part of the main casing 40 in a penetrating manner; the first through groove 33 and the second through groove 44 are inserted with the foot-cushion limiting rod 6 screwed in the fixing screw hole 112.

As shown in fig. 1, a pressure-sensitive mechanism 5 is fixedly arranged in the mounting base 13, as shown in fig. 7, the pressure-sensitive mechanism 5 includes a fixing component 51 for being screwed in the mounting base 13, the fixing component 51 includes a barrel-shaped upper housing 511 provided with external threads, a socket 512 is arranged at the upper top end of the upper housing 511, the socket 512 is arranged forward and is convenient for being electrically plugged with the second row of needles 35, W-shaped fixing clamping seats 513 are symmetrically arranged on the inner wall of the upper housing 511, a mounting nut 514 is arranged at the lower bottom end of the upper housing 511, a limiting sliding groove 515 is arranged in the center of the mounting nut 514 in a penetrating manner along the vertical direction, a barrel-shaped lower housing 516 is arranged at the lower bottom end of the mounting nut 514, the lower housing 516 is provided with external threads for mounting and fixing, and a sealing sliding hole 517 is arranged at the lower bottom end of.

As shown in fig. 7, a capacitor assembly 52 electrically inserted into the signal processing mechanism 3 is fixedly disposed in the fixing assembly 51, the capacitor assembly 52 is composed of a first capacitor plate 520-a and a second capacitor plate 520-B which are inserted into the fixing clamp 513 and are disposed in parallel, and includes a main plate 521 and a standby plate 522 disposed in a coplanar manner, an insulating strip 523 disposed in a vertical direction is connected between the main plate 521 and the standby plate 522, a first connection terminal 524 is electrically connected to the main plate 521, a second connection terminal 525 is electrically connected to the standby plate 522, and the first connection terminal 524 and the second connection terminal 525 are respectively electrically connected to the socket 512.

As shown in fig. 7, a trigger assembly 53 is inserted into the first capacitor plate 520-a and the second capacitor plate 520-B, the trigger assembly 53 is sealed and slidably disposed in the fixing assembly 51, and includes a dielectric plate 531 interposed between the first capacitor plate 520-a and the second capacitor plate 520-B, a lower end of the dielectric plate 531 is fixedly connected to a limit slide bar 532, the limit slide bar 532 is slidably inserted into the limit slide groove 515, a lower end of the limit slide bar 532 is fixedly connected to a seal slide bar 533, a middle part of the seal slide bar 533 is fixedly connected to a limit plate 534 larger than an outer diameter thereof, a return spring 535 sleeved on the seal slide bar 533 is abutted to the limit plate 534, an upper end of the return spring 535 is abutted to a lower bottom end surface of the mounting nut 514, a lower end of the seal slide bar 533 is provided with a concave pressure receiving head 536, a plurality of sealing rings 537 are sleeved on the sealing slide rod 533 between the pressure receiving head 536 and the limiting plate 534, and are slidably inserted into the sealing slide hole 517.

With reference to the specific structure of the pressure transmitter with a modular structure in the above embodiment, the following further describes an assembling method of the pressure transmitter with a modular structure:

A. installing a pressure-sensitive mechanism 5:

opening the mounting seat 13 of the main housing 10 upwards, fixing the main housing 10 by clamping a workpiece, screwing the upper housing 511 with external threads onto the internal threads of the mounting seat 13 of the main housing 10 until the socket 512 is exposed from the lower through groove 114 of the observation/debugging end of the main housing 10, rotating the mounting nut 514 clockwise by a wrench to enable the socket 512 to abut against the bottom of the lower through groove 114, and rotating the mounting nut 514 counterclockwise by the wrench to enable the socket 512 to rotate to the forward position;

B. installing a wiring terminal 2:

rotating the clamping workpiece to make the opening of the main shell 10 upward, inserting the jack group 22 on the connecting terminal 2 into the through hole group 111, and screwing the screw inserted into the through hole 21 into the fixing screw hole 112, thereby fixing the connecting terminal 2 in the main shell 10;

C. mounting the signal processing mechanism 3:

rotating the clamping workpiece to make the opening of the observation/debugging end of the main shell 10 upward, screwing the foot-cushion limiting rod 6 into the fixing screw hole 112, placing the main board 30 with the foot-cushion nut 32 fixed therein into the observation/debugging end of the main shell 10, sleeving the first through groove 33 on the foot-cushion limiting rod 6, simultaneously respectively inserting the first row of pins 34 into the jack groups 22 in the jack group 111, inserting the second row of pins 35 into the socket 512, inserting the screw into the mounting hole 36, and screwing the screw into the mounting screw hole group 113, thereby reliably fixing the signal processing mechanism 3 in the main shell 10;

D. installing a screen display mechanism 4:

the screen display mechanism 4 is placed in the observation/debugging end of the main shell 10, the second through groove 44 is sleeved on the foot pad limiting rod 6, meanwhile, the third row of needles 45 are inserted into the needle row seat 31, and screws are respectively screwed on the foot pad nut 32 and the foot pad limiting rod 6, so that the screen display mechanism 4 is reliably fixed in the main shell 10;

E. debugging:

the workpiece is clamped by rotating, so that the opening of the mounting seat 13 of the main shell 10 is downward, the metal hose with the internal thread is screwed on the lower shell 516 with the external thread, the metal hose is communicated with the constant pressure system, the wiring terminal 2 is electrically connected with the power supply and the test unit, the signal processing mechanism 3 is initialized, and the zero point and the measuring range of the pressure transmitter are verified through the display screen 41 and the button 43 arranged on the screen display mechanism 4.

According to the method for assembling the pressure transmitter with the modular structure in the above embodiment, the signal processing mechanism 3 detects the working state of each component, and therefore the method further comprises the following detection methods:

the display screen 41 displays the power supply state and the working state of the signal processing mechanism 3, the screen display mechanism 4 and the pressure-sensitive mechanism 5, so that fault points are checked;

meanwhile, the corresponding module is replaced through the checking structure.

In light of the above, it is therefore evident that the present invention is directed to a pressure transmitter with a modular structure and a method for operating the same, wherein the above description is intended to enable the operator to make numerous changes and modifications without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (8)

1. The utility model provides a pressure transmitter with modular structure, includes the main casing body of tube-shape (10) that sets up along the fore-and-aft direction, the middle part of main casing body (10) is provided with baffle (11), baffle (11) are separated main casing body (10) for respectively for the wiring, observe/two parts around debugging, the upper portion of main casing body (10) is provided with threading casing (12) along the left and right directions, the lower part of main casing body (10) is provided with tube-shape mount pad (13) along the vertical direction, the observation/debugging end seal of main casing body (10) is provided with front lens lid (14), the wiring end seal of main casing body (10) is provided with back lid (15), its characterized in:

a through hole group (111) is arranged in the center of the clapboard (11) in a penetrating way, the through hole group (111) is arranged side by side along the left and right directions, a fixed screw hole (112) is arranged on the left and right sides of the through hole group (111) in a penetrating way, an installation screw hole group (113) and a lower through groove (114) are arranged on one side of the clapboard (11) facing the observation/debugging end of the main shell (10), an upper through groove (115) communicated with the threading shell (12) is arranged on one side of the clapboard (11) facing the terminal of the main shell (10),

the wiring terminal of the main shell (10) is internally and fixedly provided with a wiring terminal (2), the rear end of the wiring terminal (2) is provided with a jack group (22) which shares the central axis with the perforation group (111), the jack group (22) is respectively and electrically connected with each terminal of the wiring terminal (2), the left side and the right side of the jack group (22) are provided with through holes (21) which share the central axis with the fixed screw holes (112) in a penetrating way,

the observation/debugging end of the main shell (10) is internally and sequentially and fixedly connected with a signal processing mechanism (3) and a screen display mechanism (4) from back to front: the signal processing mechanism (3) comprises a main board (30), a pin header (31) and a foot-cushion nut (32) are arranged on the front end face of the main board (30), a first pin header (34) and a second pin header (35) are arranged on the rear end face of the main board (30), the first pin header (34) is electrically inserted into the jack group (22), open first through grooves (33) are arranged on the left side and the right side of the middle part of the main board (30) in a penetrating manner, and mounting holes (36) which share the same central axis with the mounting screw hole group (113) are arranged on the main board (30) in a penetrating manner; the screen display mechanism (4) comprises a main shell (40), a display screen (41) and a plurality of buttons (43) are arranged on the front end face of the main shell (40), the display screen (41) is arranged right behind the front lens cover (14), a fixing hole (42) which is coaxial with the foot pad nut (32) is arranged right below the display screen (41) in a penetrating mode, a third row of pins (45) which are electrically connected with the pin row seats (31) in a penetrating mode are arranged on the rear end face of the main shell (40), and open second penetrating grooves (44) are arranged on the left side and the right side of the middle of the main shell (40) in a penetrating mode; a foot pad limiting rod (6) which is screwed in the fixed screw hole (112) is inserted in the first through groove (33) and the second through groove (44),

the utility model provides a signal processing mechanism, including mount pad (13), mount pad (13) internal fixation is provided with pressure-sensitive mechanism (5), pressure-sensitive mechanism (5) is including being used for the spiro union in mount pad (13) fixed subassembly (51), fixed subassembly (51) internal fixation is provided with capacitor assembly (52) with signal processing mechanism (3) electric grafting, capacitor assembly (52) include two sets of structures the same and parallel arrangement's first capacitor plate (520-A), second capacitor plate (520-B), first capacitor plate (520-A), second capacitor plate (520-B) interpolation are equipped with trigger assembly (53), trigger assembly (53) are sealed and are slided poor to be located in fixed subassembly (51).

2. A pressure transmitter of modular construction as claimed in claim 1, wherein:

one of the left end and the right end of the threading shell (12) is provided with a sealing cover (121) in a sealing mode, the sealing cover (121) is in threaded connection with the threading shell (12), and a groove shaped like a Chinese character 'yi' is formed in the outer portion of the sealing cover (121) so that the sealing cover (121) can be installed or detached conveniently.

3. A pressure transmitter of modular construction as claimed in claim 1, wherein:

the jack groups (22) protrude out of the front end face of the wiring terminal (2) and are respectively inserted into the through hole groups (111).

4. A pressure transmitter of modular construction as claimed in claim 3, wherein:

fixed subassembly (51) is including being provided with shell (511) on the tubbiness of external screw thread, the last top of going up shell (511) is provided with socket (512), socket (512) set up forward, be convenient for arrange needle (35) electric grafting with the second, go up the fixed cassette (513) that the symmetry was provided with "W" style of calligraphy on the inner wall of shell (511), the end of going to the bottom of going up shell (511) is provided with mounting nut (514), the central authorities of mounting nut (514) are followed the vertical direction and are run through and are provided with spacing spout (515), and the end of going to the bottom of mounting nut (514) is provided with shell (516) under the tubbiness, shell (516) are provided with and are used for installing fixed external screw thread down, and the end of going to the bottom of shell (516) runs through and.

5. Pressure transmitter with modular structure, according to claim 4, characterized in that:

the capacitor assembly (52) comprises a first capacitor plate (520-A) and a second capacitor plate (520-B) which are inserted into a fixed clamping seat (513), have the same structure and are arranged in parallel, and comprises a main plate (521) and a standby plate (522) which are arranged in a coplanar manner, wherein an insulating strip (523) is connected between the main plate (521) and the standby plate (522), a first connecting terminal (524) is electrically connected to the main plate (521), a second connecting terminal (525) is electrically connected to the standby plate (522), and the first connecting terminal (524) and the second connecting terminal (525) are respectively electrically connected with a socket (512).

6. Pressure transmitter with modular structure, according to claim 5, characterized in that:

the trigger assembly comprises a dielectric plate (531) inserted between a first capacitor plate (520-A) and a second capacitor plate (520-B), the lower end of the dielectric plate (531) is fixedly connected with a limit slide bar (532), the limit slide bar (532) is slidably inserted into a limit slide groove (515), the lower end of the limit slide bar (532) is fixedly connected with a sealing slide bar (533), the middle part of the sealing slide bar (533) is fixedly connected with a limit plate (534) with an outer diameter larger than that of the sealing slide bar, the limit plate (534) is abutted with a return spring (535) sleeved on the sealing slide bar (533), the upper end of the return spring (535) is abutted with the lower bottom end surface of the mounting nut (514), the lower end of the sealing slide bar (533) is provided with a concave pressure head (536), and a plurality of sealing rings (537) are sleeved on the sealing slide bar (533) between the pressure head (536) and the limit plate (534), and is slidably inserted into the sealing slide hole (517).

7. The method of assembling a pressure transmitter having a modular construction of claim 6, wherein:

A. mounting a pressure-sensitive mechanism (5):

the method comprises the steps that an opening of a mounting seat (13) of a main shell (10) is upward, the main shell (10) is fixed through clamping a workpiece, an upper shell (511) with external threads is screwed onto internal threads of the mounting seat (13) of the main shell (10) until a socket (512) is exposed out of a lower through groove (114) of an observation/debugging end of the main shell (10), a mounting nut (514) is rotated clockwise through a wrench, the socket (512) abuts against the bottom of the lower through groove (114), and the mounting nut (514) is rotated counterclockwise through the wrench to enable the socket (512) to rotate to the forward position;

B. installing the wiring terminal (2):

rotating the clamping workpiece to enable the opening of the wiring end of the main shell (10) to be upward, inserting the bulges of the jack group (22) arranged on the wiring terminal (2) into the through hole group (111) respectively, and screwing the screw arranged in the through hole (21) into the fixing screw hole (112), so that the wiring terminal (2) is reliably fixed in the main shell (10);

C. mounting a signal processing mechanism (3):

rotating the clamping workpiece to enable the opening of the observation/debugging end of the main shell (10) to be upward, screwing the foot-padding limiting rod (6) into the fixed screw hole (112), placing the main board (30) fixed with the foot-padding nut (32) into the observation/debugging end of the main shell (10), sleeving the first through groove (33) on the foot-padding limiting rod (6), simultaneously respectively inserting the first row of pins (34) into the jack groups (22) in the jack groups (111), inserting the second row of pins (35) into the sockets (512), inserting the screws into the mounting holes (36) and screwing the screws into the mounting screw hole groups (113), thereby reliably fixing the signal processing mechanism (3) in the main shell (10);

D. installing a screen display mechanism (4):

the screen display mechanism (4) is placed in the observation/debugging end of the main shell (10), the second penetrating groove (44) is sleeved on the foot pad limiting rod (6), meanwhile, the third row of pins (45) are inserted into the needle row seat (31), and screws are respectively screwed on the foot pad nut (32) and the foot pad limiting rod (6), so that the screen display mechanism (4) is reliably fixed in the main shell (10);

E. debugging:

the workpiece is clamped in a rotating mode, the opening of the mounting seat (13) of the main shell (10) is downward, the metal hose with the inner thread is screwed to the lower shell (516) with the outer thread, the metal hose is communicated with the constant pressure system, the wiring terminal (2) is electrically connected with the power supply and the test unit, the signal processing mechanism (3) is initialized, and the zero point and the measuring range of the pressure transmitter are verified through the display screen (41) and the button (43) arranged on the screen display mechanism (4).

8. The method of assembling a pressure transmitter having a modular construction of claim 7, wherein:

the assembling method further comprises a detection method:

the display screen (41) displays the power supply state and the working state of the signal processing mechanism (3), the screen display mechanism (4) and the pressure-sensitive mechanism (5), so that fault points are checked;

meanwhile, the corresponding module is replaced through the checking structure.

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