Differential pressure transmitter capable of automatically exhausting

Abstract

The utility model discloses an automatic exhaust differential pressure transmitter which comprises a measuring shell, a transmission shell is arranged at the upper end of the measuring shell, a single-chip microcomputer is arranged in the transmission shell, the input end of the single-chip microcomputer is electrically connected to an external power source, elastic elements are arranged at the left end and the right end in a measuring cavity of the measuring shell, and the automatic exhaust differential pressure transmitter further comprises an automatic exhaust mechanism. The automatic exhaust mechanism comprises exhaust pipes, connecting rings and scrapers, the exhaust pipes are arranged at the left end and the right end of the conveying shell respectively, the connecting rings are arranged in the middles of the elastic elements respectively, the scrapers are rotationally connected into the connecting rings through rotating shafts, and the opposite outer side faces of the two elastic elements are attached to the adjacent scrapers. According to the automatic exhaust differential pressure transmitter, bubbles attached to the surface of the elastic element of the differential pressure transmitter are separated through pushing and scraping of the scraping plate, compared with direct exhaust, attachment of the bubbles to the surface of the elastic element of the differential pressure transmitter can be reduced, and the accuracy of the detection result of the differential pressure transmitter is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a differential pressure transmitter technical field, concretely to a differential pressure transmitter of automatic exhaust. BACKGROUND

[0002] Differential pressure transmitter is a kind of instrument for measuring liquid or gas pressure difference, usually by two interfaces and an elastic element is formed, when liquid or gas passes through two interfaces, pressure difference will be generated, this pressure difference will cause elastic element to produce deformation, deformation and pressure difference are directly proportional, differential pressure transmitter calculates pressure difference by measuring the deformation of elastic element, then this pressure difference is converted into standard signal output, for controlling and monitoring liquid level, flow, temperature and other parameters in industrial process;In prior art, the authorization publication No. CN 210375503 U proposes a kind of differential pressure transmitter of automatic exhaust, including differential pressure transmitter body, automatic exhaust mechanism and dismounting mechanism, the automatic exhaust mechanism is located on differential pressure transmitter body, the automatic exhaust mechanism includes first exhaust pipe, the outer wall of the end of first exhaust pipe is connected with second exhaust pipe, the end of second exhaust pipe is equipped with fixed cover, the inside of fixed cover is provided with dust filter screen, although it can be automatically exhausted under the condition of internal pressure is too big, but after exhausting, there are still many bubbles adhered to the surface of differential pressure transmitter elastic element, affect the accuracy of differential pressure transmitter detection result. SUMMARY

[0003] The utility model solves the technical problems of overcoming the defects of prior art, provide a kind of differential pressure transmitter of automatic exhaust, the bubble adhered to the surface of differential pressure transmitter elastic element is separated by the push scraping of scraper, can reduce the adhesion of bubble on the surface of differential pressure transmitter elastic element, improve the accuracy of differential pressure transmitter detection result, can effectively solve the problems in background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of differential pressure transmitter of automatic exhaust, including measuring shell, the upper end of the measuring shell is equipped with transmission shell, the inside of transmission shell is equipped with single-chip microcomputer, the input of single-chip microcomputer is electrically connected to external power supply, the measuring cavity of measuring shell is equipped with elastic element at left and right ends, further including automatic exhaust mechanism;

[0005] Automatic exhaust mechanism: it includes exhaust pipe, connecting ring and scraper, the exhaust pipe is respectively arranged at the left and right ends of transmission shell, connecting ring is respectively arranged at the middle of elastic element, the inside of connecting ring is rotatably connected with scraper by pivot, the outer side of two elastic elements opposite each other is all pasted with adjacent scraper, the bubble adhered to the surface of differential pressure transmitter elastic element is separated by the push scraping of scraper, compared with direct exhaust, can reduce the adhesion of bubble on the surface of differential pressure transmitter elastic element, improve the accuracy of differential pressure transmitter detection result.

[0006] Further, the automatic exhaust mechanism further comprises a rotating ring, a blocking ring, an exhaust hole, an air inlet hole and an air pipe, the air pipe is arranged at the air outlet of the upper surface of the measuring shell, the rotating ring is movably sleeved on the outer arc surface of the connecting pipe of the measuring shell, the outer arc surface of the rotating ring is provided with the blocking ring at the upper end and the lower end, the upper surface of the upper blocking ring is provided with the exhaust hole, the upper surface of the lower blocking ring is provided with the air inlet hole, and the exhaust hole and the air inlet hole are matched and installed with the air pipe, and the air and the medium are separated during the exhaust process.

[0007] Further, the automatic exhaust mechanism further comprises a gas collecting pipe, the gas collecting pipe is arranged at the left end and the right end of the outer arc surface of the connecting pipe of the measuring shell, the outer arc surface of the rotating ring is provided with a rotating groove, and the gas collecting pipe is arranged in the rotating groove, so as to provide space for air storage.

[0008] Further, the sealing rubber pads are arranged on the lower surface of the upper blocking ring and the upper and lower surfaces of the lower blocking ring, so that the blocking effect of the blocking ring is improved.

[0009] Further, the bottom wall of the measuring shell is provided with a support plate, and the upper ends of the two support plates are rotatably connected with rotating pipes, the inner portions of the rotating pipes are horizontally slidably connected with slide columns, and the end heads of the slide columns are fixedly connected with adjacent scraper shafts, so that the rotation of the scraper is facilitated.

[0010] Further, the driving rod is rotatably connected with the support plate at the upper end of the measuring shell, the lower end of the driving rod is provided with a driving bevel gear, the opposite inner sides of the two rotating pipes are provided with bevel gears, the two bevel gears are meshingly connected with the driving bevel gear, the inner portion of the transmission shell is provided with a motor one, the output shaft of the motor one is fixedly connected with the upper end of the driving rod, and the input end of the motor one is electrically connected with the output end of the single-chip microcomputer, so as to provide power for the rotation of the scraper.

[0011] Further, the inner portion of the transmission shell is provided with a motor two, the output shaft of the motor two is provided with a gear, the upper blocking ring is an external gear ring, the upper blocking ring is meshingly connected with the gear, and the input end of the motor two is electrically connected with the output end of the single-chip microcomputer, so as to provide power for the rotation of the blocking ring.

[0012] Compared with the prior art, the automatic exhaust differential pressure transmitter has the following advantages:

[0013] The bubbles attached to the surface of the elastic element of the differential pressure transmitter are separated from the elastic element by the pushing and scraping of the scraper, compared with direct exhaust, the attachment of bubbles on the surface of the elastic element of the differential pressure transmitter can be reduced, and the accuracy of the detection result of the differential pressure transmitter is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The figure is a structural schematic diagram of the utility model;

[0015] Figure 2 It is the structure schematic view of the whole device front view section of the utility model;

[0016] Figure 3 It is the structure schematic view of the utility model A place amplification;

[0017] Figure 4 It is the structure schematic view of the utility model plugging ring explosion;

[0018] Figure 5 It is the structure schematic view of the utility model B place amplification;

[0019] Figure 6 It is the partial structure schematic view of the utility model automatic exhaust mechanism.

[0020] In the drawing: 1 measurement shell, 2 transmission shell, 3 single-chip microcomputer, 4 elastic element, 5 automatic exhaust mechanism, 51 exhaust pipe, 52 connecting ring, 53 scraper, 54 rotating ring, 55 plugging ring, 56 exhaust hole, 57 air inlet hole, 58 gas collecting pipe, 59 air pipe, 6 sealing rubber pad, 7 give place to rotating groove, 8 support plate, 9 rotating pipe, 10 slide column, 11 drive rod, 12 motor one, 13 motor two, 14 gear. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0022] Please refer to Figures 1-6 The embodiment provides a kind of technical scheme: an automatic exhaust differential pressure transmitter, including measurement shell 1, provide space for the pressure difference measurement of two kinds of media, the upper end of measurement shell 1 is equipped with transmission shell 2, provide space for the setting of differential pressure transmitter electrical element, the inside of transmission shell 2 is equipped with single-chip microcomputer 3, the input end of single-chip microcomputer 3 is electrically connected to external power supply, control the start and stop of whole device, the inside of measurement cavity of measurement shell 1 is equipped with elastic element 4 at left and right ends, elastic element 4 can use metal diaphragm, when two kinds of media respectively through the left and right ends of the measurement cavity of measurement shell 1 enter, two kinds of media respectively exert pressure on elastic element 4 to make it produce deformation, the amplitude of the deformation of elastic element 4 is measured by distance measuring sensor arranged in measurement shell 1 and the detection data is transmitted to single-chip microcomputer 3, single-chip microcomputer 3 calculates pressure difference according to the different deformation of two elastic elements 4, and converts pressure difference into standard signal output, further include automatic exhaust mechanism 5;

[0023] The automatic exhaust mechanism 5 comprises exhaust pipes 51, connecting rings 52 and scrapers 53, the exhaust pipes 51 are respectively arranged at the left and right ends of the transmission shell 2, the connecting rings 52 are respectively arranged at the middle parts of the elastic elements 4, the interiors of the connecting rings 52 are respectively rotationally connected with the scrapers 53 through rotating shafts, the outer sides of the two elastic elements 4 away from each other are respectively attached with the adjacent scrapers 53, in the deformation process of the elastic elements 4, the scrapers 53 made of plastic material are elastically deformed under the driving of the connecting rings 52, so that the attachment state of the scrapers 53 and the surfaces of the elastic elements 4 is kept, the bubbles attached to the surfaces of the elastic elements 4 are pushed and scraped by the rotation of the scrapers 53, the influence of the bubbles on the detection result is reduced, the automatic exhaust mechanism 5 further comprises rotating rings 54, blocking rings 55, exhaust holes 56, air inlet holes 57 and air pipes 59, the air pipes 59 are respectively arranged at the air outlet positions on the upper surface of the measuring shell 1, the rotating rings 54 are movably sleeved on the outer arc surfaces of the connecting pipes of the measuring shell 1, the outer arc surfaces of the rotating rings 54 are respectively provided with the blocking rings 55 at the upper and lower ends, the upper surfaces of the upper blocking rings 55 are respectively provided with the exhaust holes 56, the upper surfaces of the lower blocking rings 55 are respectively provided with the air inlet holes 57, the exhaust holes 56 and the air inlet holes 57 are respectively installed in cooperation with the air pipes 59, the automatic exhaust mechanism 5 further comprises air collecting pipes 58, the air collecting pipes 58 are respectively arranged at the left and right ends of the outer arc surfaces of the connecting pipes of the measuring shell 1, the outer arc surface of the rotating ring 54 is provided with a rotating slot 7, the air collecting pipes 58 are respectively located in the rotating slot 7, the lower blocking ring 55 is located between the air collecting pipe 58 and the air pipe 59, and the upper blocking ring 55 is located between the air collecting pipe 58 and the exhaust pipe 51, the rotating angle of the blocking ring 55 is limited by the rotating slot 7, so that the blocking ring 55 is rotated by 90 degrees at most, when the blocking ring 55 is rotated by 90 degrees, the exhaust hole 56 is switched to coincide with the air collecting pipe 58 from the air inlet hole 57, when the upper blocking ring 55 is rotated, the upper and lower blocking rings 55 are synchronously rotated under the connection of the rotating ring 54, the positions of the exhaust hole 56 and the air inlet hole 57 are adjusted, when the air inlet hole 57 vertically coincides with the air pipe 59 and the exhaust hole 56 vertically deviates from the air pipe 59, the medium enters the air collecting pipe 58 through the air pipe 59 and the air inlet hole 57 in sequence, the upper end of the air collecting pipe 58 is blocked by the upper blocking ring 55, under the action of the buoyancy, the bubbles in the medium are gathered in the air collecting pipe 58, when the air inlet hole 57 vertically deviates from the air pipe 59, the lower end of the air collecting pipe 58 is blocked by the lower blocking ring 55, the exhaust hole 56 vertically coincides with the air collecting pipe 58, the exhaust pipe 51 communicates with the air collecting pipe 58 through the exhaust hole 56, the air in the air collecting pipe 58 is discharged outward through the exhaust pipe 51, the automatic exhaust of the differential pressure transmitter is realized, the lower surface of the upper blocking ring 55 and the upper and lower surfaces of the lower blocking ring 55 are respectively provided with sealing rubber pads 6, the sealing effect of the blocking ring 55 is improved, the bottom wall of the measuring shell 1 is respectively provided with support plates 8, the upper ends of the two support plates 8 symmetrically distributed left and right are rotationally connected with rotating pipes 9, the interiors of the rotating pipes 9 are horizontally slidably connected with slide columns 10, the end heads of the slide columns 10 are respectively fixedly connected with the rotating shafts of the adjacent scrapers 53,During the deformation of the elastic element 4, the rotating tube 9 and the sliding column 10 slide laterally relative to each other. A drive rod 11 is rotatably connected inside the support plate at the upper end of the measuring shell 1. A drive bevel gear is provided at the lower end of the drive rod 11. Both rotating tubes 9 have bevel gears on their opposite inner surfaces, and both bevel gears mesh with the drive bevel gears. A motor 12 is located inside the transmission shell 2. The output shaft of the motor 12 is fixedly connected to the upper end of the drive rod 11. The input end of the motor 12 is electrically connected to the output end of the microcontroller 3. When the motor 12 is started, its output shaft drives the drive rod 11 and the drive bevel gear to rotate. Through the meshing connection between the drive bevel gears, the bevel gears rotate... The gear drives the rotating tube 9 to rotate. Due to the lateral sliding connection between the rotating tube 9 and the sliding column 10, the rotating tube 9 and the sliding column 10 cannot rotate relative to each other. The sliding column 10 also drives the scraper 53 to rotate. A second motor 13 is installed inside the transmission housing 2. A gear 14 is located at the lower end of the output shaft of the second motor 13. The upper sealing ring 55 is an external gear ring, which meshes with the gear 14. The input end of the second motor 13 is electrically connected to the output end of the microcontroller 3. When the second motor 13 starts, its output shaft drives the gear 14 to rotate. Through the meshing connection between the gear 14 and the upper sealing ring 55, the sealing ring 55 and the rotating ring 54 rotate.

[0024] The working principle of the differential pressure transmitter with automatic exhaust provided by the utility model is as follows: in use, the air inlet hole 57 is vertically coincident with the air pipe 59, and the air outlet hole 56 is vertically dislocated with the air pipe 59; after the measuring medium enters the left and right ends of the measuring cavity of the measuring shell 1 respectively, the medium enters the inside of the gas collecting pipe 58 in turn through the air pipe 59 and the air inlet hole 57; the upper sealing ring 55 is used to seal the upper end of the gas collecting pipe 58; the two kinds of medium respectively exert pressure on the elastic element 4 to make it deform; under the driving of the connecting ring 52, the plastic material scraping plate 53 elastically deforms; the sliding column 10 and the rotating pipe 9 slide transversely relative to each other; the scraping plate 53 and the surface of the elastic element 4 are kept in a state of adhesion; the amplitude of the deformation of the elastic element 4 is measured by the distance measuring sensor arranged at the upper end of the supporting plate 8, and the detection data is transmitted to the single-chip microcomputer 3; when the elastic element 4 deforms, the single-chip microcomputer 3 starts the motor one 12; the output shaft of the motor one 12 drives the driving rod 11 and the driving bevel gear to rotate; the meshing connection of the driving bevel gear and the bevel gear makes the bevel gear drive the rotating pipe 9 to rotate; under the influence of the transversely sliding connection between the rotating pipe 9 and the sliding column 10, the rotating pipe 9 and the sliding column 10 cannot rotate relative to each other; the sliding column 10 drives the scraping plate 53 to rotate; the scraping plate 53 pushes and scrapes the bubbles on the surface of the elastic element 4, so that the bubbles on the surface of the elastic element 4 are separated from the adhesion and move upward in the medium; the bubbles finally concentrate in the gas collecting pipe 58; according to the set pushing and scraping time, when the pushing and scraping are finished, the motor one 12 stops, and the motor two 13 starts; the output shaft of the motor two 13 drives the gear 14 to rotate; the gear 14 is meshingly connected with the upper sealing ring 55, drives the sealing ring 55 and the rotating ring 54 to rotate, makes the air inlet hole 57 vertically dislocate with the air pipe 59, uses the lower sealing ring 55 to seal the lower end of the gas collecting pipe 58, makes the air outlet hole 56 vertically coincide with the gas collecting pipe 58, and makes the exhaust pipe 51 communicate with the gas collecting pipe 58 through the air outlet hole 56; the air in the gas collecting pipe 58 is discharged outward through the exhaust pipe 51, realizes the automatic exhaust of the differential pressure transmitter, reduces the influence of the bubbles on the measurement result, after the exhaust is completed, the rotating ring 54 reversely rotates and resets, and then the single-chip microcomputer 3 calculates the pressure difference according to the different deformation amounts of the two elastic elements 4, and converts the pressure difference into a standard signal output.

[0025] It is worth noting that the single-chip microcomputer 3 disclosed in the above embodiment can be selected from the AT89C4051 type single-chip microcomputer, and the motor one 12 and the motor two 13 can be freely configured according to the actual application scene, and can be selected from the 3M57-42A type stepping motor; the single-chip microcomputer 3 controls the motor one 12 and the motor two 13 to work by using the method commonly used in the prior art.

[0026] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion obtained by using the utility model specification and drawing contents, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. A differential pressure transmitter with automatic venting, comprising a measuring housing (1), wherein a transmission housing (2) is provided at the upper end of the measuring housing (1), a microcontroller (3) is provided inside the transmission housing (2), the input end of the microcontroller (3) is electrically connected to an external power supply, and elastic elements (4) are provided at both the left and right ends of the measuring cavity inside the measuring housing (1), characterized in that: It also includes an automatic exhaust mechanism (5); The automatic exhaust mechanism (5) further includes a rotating ring (54), a blocking ring (55), an exhaust hole (56), an air inlet hole (57) and an air pipe (59), the air pipe (59) is arranged at the air outlet of the upper surface of the measuring shell (1), the rotating ring (54) is movably sleeved on the outer arc surface of the connecting pipe of the measuring shell (1), the outer arc surface of the rotating ring (54) is provided with the blocking ring (55) at the upper and lower ends, the upper surface of the upper blocking ring (55) is provided with the exhaust hole (56), the upper surface of the lower blocking ring (55) is provided with the air inlet hole (57), and the exhaust hole (56) and the air inlet hole (57) are matched with the air pipe (59).

2. A self-venting differential pressure transmitter according to claim 1, wherein: The automatic exhaust mechanism (5) further includes a gas collecting pipe (58), the gas collecting pipe (58) is arranged at the left and right ends of the outer arc surface of the connecting pipe of the measuring shell (1), the outer arc surface of the rotating ring (54) is provided with a turning groove (7), and the gas collecting pipe (58) is located in the turning groove (7).

3. A self-venting differential pressure transmitter according to claim 2, wherein: It also includes a sealing rubber (6), which is arranged on the lower surface of the upper blocking ring (55) and the upper and lower surfaces of the lower blocking ring (55).

4. A self-venting differential pressure transmitter according to claim 2, wherein: The bottom wall of the measuring shell (1) is provided with a support plate (8), and the upper ends of the two support plates (8) are rotatably connected with a rotating pipe (9), the inner part of the rotating pipe (9) is transversely slidably connected with a sliding column (10), and the end of the sliding column (10) is fixedly connected with the rotating shaft of the adjacent scraper (53).

5. The self-venting differential pressure transmitter of claim 1, wherein: The inner rotating plate of the measuring shell (1) is rotatably connected with a driving rod (11), the lower end of the driving rod (11) is provided with a driving bevel gear, the opposite inner sides of the two rotating pipes (9) are provided with bevel gears, and the two bevel gears are meshingly connected with the driving bevel gear.

6. A self-venting differential pressure transmitter according to claim 5, wherein: The inner part of the measuring shell (2) is provided with a motor (12), the output shaft of the motor (12) is fixedly connected with the upper end of the driving rod (11), and the input end of the motor (12) is electrically connected with the output end of the single-chip microcomputer (3).

7. A self-venting differential pressure transmitter according to claim 2, wherein: The inner part of the measuring shell (2) is provided with a motor (12), the output shaft of the motor (12) is fixedly connected with the upper end of the driving rod (11), and the input end of the motor (12) is electrically connected with the output end of the single-chip microcomputer (3).

Images