CN213148152U

CN213148152U - Overload-proof pressure transmitter

Info

Publication number: CN213148152U
Application number: CN202021708649.6U
Authority: CN
Inventors: 余德丰; 杨成; 王政平
Original assignee: Shanghai Yufavor Sensor Instrument Co ltd
Current assignee: Shanghai Yufavor Sensor Instrument Co ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2021-05-07
Anticipated expiration: 2030-08-17

Abstract

The utility model discloses an anti-overload pressure transmitter, which comprises a frame, the air inlet has been seted up to the frame lower extreme, the inside bracing piece that is provided with of frame, bracing piece and frame inner wall all are provided with sealed spout, sealed spout sliding connection has the rubber slide, rubber slide one end fixedly connected with air lock, the inside changer inner chamber of having seted up of frame, bracing piece one side fixedly connected with connecting block, connecting block one end fixedly connected with screen display device, the bracing piece passes through connecting block and screen display device fixed connection, frame upper end fixedly connected with relief valve unit. The utility model discloses on the indirect transmission of pressure to pressure sensor that accessible rubber sliding block will accept to the treater passes through the display screen with the pressure value and clearly shows, the relief valve device of setting can carry out the pressure release when pressure transmitter internal pressure is too big, prevents pressure transmitter's damage, thereby realizes protecting the function of whole device.

Description

Overload-proof pressure transmitter

Technical Field

The utility model belongs to the technical field of pressure transmitter, concretely relates to overload prevention's pressure transmitter.

Background

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. The pressure transmitter can be divided into force (torque) balance type, capacitance type, inductance type, strain type, frequency type and the like according to different conversion principles, and the following briefly introduces the principles, structures, use, overhaul, check and other knowledge of several pressure (differential pressure) transmitters. The pressure transmitter is mainly used for transmitting a pressure signal to electronic equipment, and then the principle of displaying the pressure on a computer is that: the pressure of an electronic signal, which is an electronic signal for converting a mechanical signal of the pressure of water pressure into current (4-20mA), is in a linear relationship with the voltage or the current, and is generally in a direct ratio relationship. Therefore, the voltage or current output by the transmitter is increased along with the increase of the pressure, so that two pressures of a measured medium of the pressure transmitter with a relation of the pressure and the voltage or the current are obtained, the two pressures are introduced into a high pressure chamber and a low pressure chamber, the pressure of the low pressure chamber adopts the atmospheric pressure or vacuum, acts on the isolation diaphragms on the two sides of the delta element (namely a sensitive element), and is transmitted to the two sides of the measurement diaphragm through the isolation diaphragms and filling liquid in the element. The pressure transmitter is a capacitor formed by a measuring diaphragm and electrodes on insulating sheets on two sides. When the pressures at two sides are not consistent, the measuring diaphragm is caused to displace, the displacement is in direct proportion to the pressure difference, so that the capacitances at two sides are not equal, and the oscillation and demodulation links are adopted.

The existing pressure transmitter technology has the following problems: the traditional pressure transmitter has no self-protection device, and when the working pressure exceeds the maximum pressure value born by the pressure transmitter, overload is opposite, so that equipment is easily cracked or damaged, and irreparable loss is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an overload protection's pressure transmitter to the equipment that proposes does not have overload protection's problem in solving above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an anti-overloading pressure transmitter, includes the frame, the air inlet has been seted up to the frame lower extreme, the inside bracing piece that is provided with of frame, bracing piece and frame inner wall all are provided with sealed spout, sealed spout sliding connection has the rubber slide, rubber slide one end fixedly connected with air plug, the inside changer inner chamber of having seted up of frame, bracing piece one side fixedly connected with connecting block, connecting block one end fixedly connected with screen display device, the bracing piece passes through connecting block and screen display device fixed connection, frame upper end fixedly connected with relief valve unit.

Preferably, the screen display device comprises a plurality of fixing clamping grooves, pressure sensors, a processor, a display screen and a wire, the fixing clamping grooves are in a plurality, the fixing clamping grooves are fixedly connected with the inner wall of the rack, the two ends of each pressure sensor are fixedly connected with the fixing clamping grooves, and the pressure sensors are fixedly connected with the rack through the fixing clamping grooves.

Preferably, the display screen, the processor and the pressure sensor are connected in pairs through conducting wires, and two ends of the display screen are fixedly installed inside the rack.

Preferably, the safety valve device comprises an annular sealing ring, a channel, a rubber sucker, an L-shaped channel pipe, a telescopic rod, a compression spring, a fixing block, a safety valve inner cavity and a baffle plate, wherein the channel is communicated with the safety valve inner cavity, the annular sealing ring is arranged around the channel, and the annular sealing ring is fixedly connected to the upper end of the rack.

Preferably, fixed block fixed connection is at the top in the relief valve device, fixed block lower extreme fixedly connected with telescopic link, telescopic link internally mounted has compression spring, telescopic link lower extreme fixedly connected with baffle, the baffle is provided with rubber suction cup all around, L type passageway pipe symmetry sets up in relief valve inner chamber both sides, and communicates with the relief valve inner chamber.

Preferably, the air plug is made of weighted rubber, and one side of the rack is fixedly connected with a recovery knob.

Preferably, the pressure sensor is an MSP300 pressure sensor.

Compared with the prior art, the utility model provides an overload protection pressure transmitter possesses following beneficial effect:

the utility model discloses on the indirect transmission of pressure that accessible rubber slide will accept pressure sensor, pressure sensor gives the treater with signal transmission, and the display screen shows the processing result, and the relief valve device of setting can carry out the pressure release when pressure transmitter internal pressure is too big, prevents pressure transmitter's damage to realize protecting the function of whole device.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description, do not constitute a limitation of the invention, in which:

fig. 1 is an overall sectional view of the present invention;

fig. 2 is a cross-sectional view of a safety valve device according to the present invention;

fig. 3 is a cross-sectional view of the screen display device of the present invention.

In the figure: 1. a frame; 2. an air inlet; 3. an air lock; 4. a rubber slider; 5. a support bar; 6. connecting blocks; 7. fixing the clamping groove; 8. a pressure sensor; 9. a processor; 10. a display screen; 11. an annular seal ring; 12. a channel; 13. a rubber suction cup; 14. an L-shaped channel tube; 15. a telescopic rod; 16. a compression spring; 17. a fixed block; 18. the inner cavity of the safety valve; 19. a safety valve device; 20. an inner cavity of the transmitter; 21. A baffle plate; 22. a screen display device; 23. and (6) restoring the knob.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: the utility model provides an anti-overloading pressure transmitter, includes frame 1, and air inlet 2 has been seted up to 1 lower extreme of frame, and 1 inside bracing piece 5 that is provided with of frame,

bracing piece

5 and 1 inner wall of frame all are provided with sealed spout, and sealed spout sliding connection has

rubber slide

4, and 4 one end fixedly connected with air lock 3 of rubber slide, 1 inside changer inner chamber 20 of having seted up of frame, air lock 3 is for aggravating rubber and makes, and 1 one side fixedly connected with of frame resumes knob 23, resumes knob 23 internally mounted and has the piston. The rubber slide blocks 4 at the two ends of the sealed air plug 3 move on the sealed sliding grooves to compress air in the transmitter inner cavity 20, the sealed sliding grooves are tightly connected with the rubber slide blocks 4, air leakage cannot occur, the recovery knob 23 is arranged on one side of the rack and is communicated with the transmitter inner cavity 20, after one-time pressure measurement is completed, the recovery knob 23 is rotated, the piston slides upwards, a channel between the transmitter inner cavity 20 and the outside is opened, the internal air pressure and the external air pressure are consistent, and the air plug 3 made of special weight materials slowly slides to the initial position on the sliding grooves due to gravity.

Referring to fig. 2, the safety valve device 19 is fixedly connected to the upper end of the rack 1, the safety valve device 19 includes an annular seal ring 11, a channel 12, a rubber suction cup 13, an L-shaped channel tube 14, an expansion link 15, a compression spring 16, a fixed block 17, a safety valve inner cavity 18 and a baffle 21, the channel 12 is communicated with the safety valve inner cavity 18, the annular seal ring 11 is installed around the channel 12, the annular seal ring 11 is fixedly connected to the upper end of the rack 1, the fixed block 17 is fixedly connected to the inner top of the safety valve device 19, a telescopic link 15 is fixedly connected to the lower end of the fixed block 17, the compression spring 16 is installed inside the telescopic link 15, the baffle 21 is fixedly connected to the lower end of the telescopic link 15, the rubber suction cups 13 are arranged around the. When the transmitter exceeds a rated pressure value, the safety valve device 19 is started, gas enters the safety valve device 19 through the channel 12, and the annular sealing ring 11 is connected between the safety valve device 19 and the transmitter body, so that gas leakage is avoided; when the pressure exceeds the rated pressure, the upward air pressure of the inner cavity 20 of the transmitter is greater than the elastic force of the compression spring 16, the telescopic rod 15 contracts to drive the baffle 21 to ascend and separate from the passage opening, gas enters the inner cavity 18 of the safety valve instantly and is discharged by the L-shaped passage pipes 14 on the two sides, when the pressure of the inner cavity 20 of the transmitter is reduced and is recovered to the rated pressure value, because the elastic force is greater than the upward air pressure of the inner cavity 20 of the transmitter, the telescopic rod 15 stretches forwards to drive the baffle 21 to block the passage opening again, the safety valve device 19 finishes working, the rubber sucker 13 well ensures the sealing performance of the device, and the matching effect of the telescopic rod 15 and the fixed block 17 enables the device to avoid the left.

Referring to fig. 3, 5 one side fixedly connected with connecting blocks 6 of bracing piece, 6 one end fixedly connected with screen display device 22 of connecting block, screen display device 22 includes fixed slot 7, pressure sensor 8, treater 9, display screen 10 and wire, fixed slot 7 is a plurality of in quantity, and a plurality of fixed slot 7 all with 1 inner wall fixed connection of frame, 8 both ends fixedly connected with fixed slot 7 of pressure sensor, pressure sensor 8 passes through

fixed slot

7 and 1 fixed connection of frame, display screen 10, two liang of treater 9 and pressure sensor 8 are connected through the wire, and 10 both ends fixed mounting of display screen are inside 1 frame. Fixing slot 7 fixes pressure sensor 8 in frame 1, leads to pressure sensor 8 to deform when avoiding receiving the pressure oppression, and when air lock 3 upwards slided, the 20 air in transmitter inner chamber is compressed, and pressure sensor 8 gathers pressure data and transmits to treater 9 through the wire and handles, and treater 9 makes things convenient for personnel real-time observation with signal transmission to display screen 10.

The utility model discloses a theory of operation and use flow: the utility model discloses after having installed, gaseous 2 entering transmitters from the air inlet, 3 upslidings of air lock, 3 extrusion changes of air lock 20 air of air feed inner chamber, thereby make pressure sensor 8 experience pressure, show the pressure value through display screen 10, when pressure surpassed threshold value pressure, relief valve device 19 starts, reduce the internal gas pressure of changer, protection device, after accomplishing a complete pressure measurement operation, knob 23 is resumeed in the rotating, make to become the internal and external gas pressure balance of air feed, 3 glidings of air lock to initial position.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An overload-proof pressure transmitter, includes frame (1), its characterized in that: air inlet (2) have been seted up to frame (1) lower extreme, frame (1) inside is provided with bracing piece (5), bracing piece (5) and frame (1) inner wall one side all are provided with sealed spout, sealed spout sliding connection has rubber slide (4), rubber slide (4) one end fixedly connected with air lock (3), changer inner chamber (20) have been seted up to frame (1) inside, bracing piece (5) opposite side fixedly connected with connecting block (6), the one end fixed connection that bracing piece (5) were kept away from in connecting block (6) is provided with screen display device (22), bracing piece (5) are through connecting block (6) and screen display device (22) fixed connection, frame (1) upper end fixedly connected with relief valve device (19).

2. The overload protected pressure transmitter of claim 1, wherein: the screen display device (22) comprises a plurality of fixing clamping grooves (7), pressure sensors (8), a processor (9), a display screen (10) and a wire, wherein the fixing clamping grooves (7) are in a plurality, the fixing clamping grooves (7) are fixedly connected with the inner wall of the rack (1), the two ends of each pressure sensor (8) are fixedly connected with the fixing clamping grooves (7), and the pressure sensors (8) are fixedly connected with the rack (1) through the fixing clamping grooves (7).

3. The overload protected pressure transmitter of claim 2, wherein: display screen (10), treater (9) and pressure sensor (8) are two liang connected through the wire, just display screen (10) both ends fixed mounting is inside frame (1).

4. The overload protected pressure transmitter of claim 1, wherein: the safety valve device (19) comprises an annular sealing ring (11), a channel (12), a rubber sucker (13), an L-shaped channel pipe (14), an expansion rod (15), a compression spring (16), a fixing block (17), a safety valve inner cavity (18) and a baffle (21), the channel (12) is communicated with the safety valve inner cavity (18), the annular sealing ring (11) is installed around the channel (12), and the annular sealing ring (11) is fixedly connected to the upper end of the rack (1).

5. The overload protected pressure transmitter of claim 4, wherein: fixed block (17) fixed connection is top in relief valve device (19), fixed block (17) lower extreme fixedly connected with telescopic link (15), telescopic link (15) internally mounted has compression spring (16), telescopic link (15) lower extreme fixedly connected with baffle (21), baffle (21) are provided with rubber suction cup (13) all around, L type passageway pipe (14) symmetry sets up in relief valve inner chamber (18) both sides, and communicates with relief valve inner chamber (18).

6. The overload protected pressure transmitter of claim 1, wherein: the air plug (3) is made of weighting rubber, a recovery knob (23) is fixedly connected to one side of the rack (1), and a piston is arranged inside the recovery knob (23).

7. The overload protected pressure transmitter of claim 2, wherein: the type of the pressure sensor (8) is MSP 300.