CN210198626U - Gas differential pressure transmitter - Google Patents
Gas differential pressure transmitter Download PDFInfo
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- CN210198626U CN210198626U CN201921163582.XU CN201921163582U CN210198626U CN 210198626 U CN210198626 U CN 210198626U CN 201921163582 U CN201921163582 U CN 201921163582U CN 210198626 U CN210198626 U CN 210198626U
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Abstract
The utility model discloses a gaseous differential pressure transmitter, which comprises a housin, the middle part is fixed with the atmospheric pressure receiver tube in the casing, both ends are sealed about the atmospheric pressure receiver tube, and the inner wall sliding connection of atmospheric pressure receiver tube has the pressure sensing diaphragm, top surface central point puts and still is fixed with the LED converter in the atmospheric pressure receiver tube, casing upper portion still is fixed with digital display screen, and the output of LED converter passes through the wire with digital display screen's input and is connected, screw fixedly connected with receiver tube is passed through at the lower terminal surface middle part of LED converter, and receiver tube inner wall sliding connection has the receiving column, and the lower extreme fixed connection of receiving column is on the pressure sensing diaphragm, still install the pressure sensing chip on the interior top surface of receiver tube. The utility model discloses can realize in time disappointing the protection when gas pressure transships to avoid differential pressure transmitter to damage, can also measure reinforcing differential pressure transmitter's measuring range to less atmospheric pressure.
Description
Technical Field
The utility model relates to a gaseous differential pressure transmitter technical field especially relates to a gaseous differential pressure transmitter.
Background
The differential pressure transmitter is used for preventing a medium in a pipeline from directly entering the transmitter, the pressure sensing diaphragm is connected with the transmitter by a capillary filled with fluid and used for measuring the liquid level, the flow and the pressure of liquid, gas or steam, then the liquid level, the flow and the pressure are converted into 4-20 mA DC signals to be output, the gas differential pressure transmitter usually selects a proper measuring range according to the use requirement, so that an overload protection device is not arranged in the gas differential pressure transmitter, the pressure sensing diaphragm is easy to overload and damage when the gas differential pressure transmitter is used, when the gas pressure is very small, the pressure sensing diaphragm can move only by a certain acting force due to the self weight of the pressure sensing diaphragm, so that the initial movement needs a certain pressure, the gas pressure too small pressure sensing diaphragm can not move, the gas with smaller pressure can not be measured, and the actual use requirement can not be met, it is necessary to develop a gas differential pressure transmitter.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the shortcoming that exists among the prior art, and the gaseous differential pressure transmitter that proposes.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a gas differential pressure transmitter comprises a shell, wherein a gas pressure receiving pipe is fixed at the middle part in the shell, the upper end and the lower end of the gas pressure receiving pipe are sealed, a pressure sensing film is connected to the inner wall of the gas pressure receiving pipe in a sliding manner, an LED converter is further fixed at the central position of the inner top surface of the gas pressure receiving pipe, a digital display screen is further fixed at the upper part of the shell, the output end of the LED converter is connected with the input end of the digital display screen through a lead, a receiving cylinder is fixedly connected to the middle part of the lower end surface of the LED converter through a screw, a receiving column is slidably connected to the inner wall of the receiving cylinder, the lower end of the receiving column is fixedly connected to the pressure sensing film, a pressure sensing chip is further installed on the inner top surface of the receiving cylinder, a pressure sensing spring I is fixedly connected between the upper end of the receiving column and the pressure sensing chip, air cylinders are, the pressure-sensitive device is characterized in that two sides of the inner top surface of the air pressure receiving pipe are fixedly connected with a buffer cylinder through screws, a buffer column is connected in the buffer cylinder in a sliding manner, the lower end of the buffer column is fixedly connected on a pressure-sensitive film, a buffer spring is fixedly arranged between the buffer column and the inner bottom surface of the buffer cylinder, two sides of the upper end of the buffer column are fixedly provided with sliders through screws, two sides of the inner wall of the buffer cylinder are provided with chutes, the sliders are connected in the chutes in a sliding manner, the central position of the lower end surface of the air pressure receiving pipe is also connected with a gas input pipe in a penetrating manner, the lower end of the gas input pipe extends to the outer side of the shell, one side of the lower end of the gas input pipe is connected with a pressure relief pipe in a penetrating manner, the pressure relief pipe is positioned outside the shell, the inner wall, and the guide pillar is equipped with two and is symmetrical about the horizontal center line of disc, the one end of guide pillar passes the fixed plate and passes through screw fixedly connected with clamp plate at the tip, and the central point of one side that the fixed plate was kept away from to the clamp plate puts through screw fixedly connected with depression bar, the one side that the fixed plate was kept away from to the pressure release inside pipe wall still passes through screw fixedly connected with mounting panel, the one end central point that the mounting panel is close to the depression bar puts and installs control switch, and the other end of mounting panel installs audible alarm, pressure release pipe lower extreme middle part still runs through and is connected.
Preferably, all be equipped with the cushion between the output of receiving post, cushion post and cylinder and the pressure sensing diaphragm, and all pass through screw fixed connection between cushion and the output of receiving post, cushion post and cylinder.
Preferably, the exhaust pipe is located on the lower side of the guide pillar, and the closest distance between one end of the disc close to the gas input pipe and the exhaust pipe is consistent with the linear distance between the pressure lever and the control switch.
Preferably, the pressure sensing film is attached to the inner wall of the air pressure receiving pipe.
Preferably, the fixing plate is located on the side of the disc remote from the gas inlet pipe.
Preferably, the control switch is a self-reset control switch.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a be connected with the pressure release pipe in one side of gas input pipe, and install disc, fixed plate, pressure sensing spring two, guide pillar, clamp plate, depression bar, mounting panel, control switch and audible alarm in the pressure release pipe, thus when gas pressure was too big, gas can be discharged from the blast pipe, and audible alarm sends out the police dispatch newspaper, makes people in time stop measuring, guarantees differential pressure transmitter's security, prolongs differential pressure transmitter's life;
2. the utility model discloses a be fixed with the cylinder on the bottom surface in the atmospheric pressure receiving tube, and the output of cylinder and the lower terminal surface laminating of pressure sensing diaphragm to drive pressure sensing diaphragm through the cylinder and remove when the pressure measurement is less gaseous, the cylinder returns to the initial condition after moving a section distance, because the effect of negative pressure this moment, pressure sensing diaphragm can return, the numerical value on the digital display screen is the pressure value of measuring gas after the retraction stops, reinforcing means's application range;
3. the utility model discloses a buffer cylinder, buffering post, buffer spring and stopper's effect can make pressure sensing diaphragm receiving pressure effect slow movement, avoids pressure sensing diaphragm to remove and leads to pressure sensing spring to take place deformation at the excessive speed, guarantees measuring result's accuracy nature.
Drawings
Fig. 1 is a schematic structural diagram of a gas differential pressure transmitter according to the present invention;
fig. 2 is an enlarged view of a position a in the gas differential pressure transmitter provided by the present invention;
fig. 3 is a cross-sectional view of a gas differential pressure transmitter at B according to the present invention;
fig. 4 is an enlarged view of the C-position in the gas differential pressure transmitter according to the present invention.
In the figure: the device comprises a shell 1, an air pressure receiving tube 2, a pressure sensing diaphragm 3, an LED converter 4, a digital display screen 5, a receiving cylinder 6, a receiving column 7, a pressure sensing chip 8, a first pressure sensing spring 9, an air cylinder 10, a soft cushion 11, a buffer cylinder 12, a buffer column 13, a buffer spring 14, a limiting block 15, an air input tube 16, a pressure relief tube 17, a disc 18, a fixing plate 19, a second pressure sensing spring 20, a guide post 21, a pressure plate 22, a pressure rod 23, an installation plate 24, a control switch 25, an audible alarm 26, an exhaust tube 27 and a control valve 28.
Detailed Description
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.
Referring to fig. 1-4, a gas differential pressure transmitter comprises a housing 1, a gas pressure receiving tube 2 is fixed in the middle of the housing 1, the upper and lower ends of the gas pressure receiving tube 2 are sealed, a pressure sensing diaphragm 3 is connected to the inner wall of the gas pressure receiving tube 2 in a sliding manner, an LED converter 4 is fixed in the center of the inner top surface of the gas pressure receiving tube 2, a digital display screen 5 is fixed on the upper portion of the housing 1, the output end of the LED converter 4 is connected with the input end of the digital display screen 5 through a lead, a receiving cylinder 6 is fixedly connected to the middle of the lower end surface of the LED converter 4 through a screw, a receiving column 7 is connected to the inner wall of the receiving cylinder 6 in a sliding manner, the lower end of the receiving column 7 is fixedly connected to the pressure sensing diaphragm 3, a pressure sensing chip 8 is further installed on the inner top surface of the receiving cylinder 6, a pressure sensing spring 9 is fixedly connected between the upper end, the output end of the cylinder 10 is fitted with the lower end face of the pressure sensing diaphragm 3, both sides of the inner top face of the air pressure receiving pipe 2 are fixedly connected with a buffer cylinder 12 through screws, a buffer column 13 is connected in the buffer cylinder 12 in a sliding manner, the lower end of the buffer column 13 is fixedly connected on the pressure sensing diaphragm 3, a buffer spring 14 is fixed between the buffer column 13 and the inner bottom face of the buffer cylinder 12, both sides of the upper end of the buffer column 13 are also fixed with slide blocks 15 through screws, both sides of the inner wall of the buffer cylinder 12 are provided with slide grooves, the slide blocks 15 are connected in the slide grooves in a sliding manner, the center position of the lower end face of the air pressure receiving pipe 2 is also connected with an air input pipe 16 in a penetrating manner, the lower end of the air input pipe 16 extends to the outer side of the shell 1, one side of the lower end of the air input pipe 16 is connected with a, a second pressure sensing spring 20 is fixedly connected between the fixing plate 19 and the disc 18, a guide post 21 is fixed on one side end face, close to the fixing plate 19, of the disc 18 through a screw, the two guide posts 21 are arranged and are symmetrical about a horizontal center line of the disc 18, one end of the guide post 21 penetrates through the fixing plate 19 and is fixedly connected with a pressing plate 22 at the end part, a pressing rod 23 is fixedly connected with a screw at the center position of one side, away from the fixing plate 19, of the pressing plate 22, a mounting plate 24 is fixedly connected with one side, away from the fixing plate 19, of the inner wall of the pressure relief pipe 17, a control switch 25 is installed at the center position, close to the pressing rod 23, of the mounting plate 24, an audible alarm 26 is installed at the other end of.
The utility model discloses a theory of operation is: when measuring, firstly, gas is introduced into the gas input pipe 16, under the action of gas pressure, the pressure sensing diaphragm 3 is stressed to press the pressure sensing spring I9, at the moment, the pressure sensing spring I9 acts on the pressure sensing chip 8, the pressure sensing chip 8 transmits a signal into the LED converter 4, the LED converter 4 converts the signal into an electric signal and transmits the electric signal to the digital display screen 5, the digital display screen 5 displays the gas pressure value at the moment, when the measuring pressure is overlarge, the movement of the disc 18 drives the pressure lever 23 to press the control switch 25, the sound alarm 26 starts to work, the gas is discharged from the exhaust pipe 27, when the pressure is small, the pressure sensing diaphragm 3 is driven to move by the cylinder 10 while the gas with small pressure is measured, the cylinder 10 retracts to the initial state after moving for a certain distance, at the moment, the pressure sensing diaphragm 3 retracts due to the action of negative pressure, the value on the digital display screen after the retraction is stopped is the pressure value of the measuring gas, thereby completing the measurement of the smaller air pressure.
Further, the soft pads 11 are arranged between the output ends of the receiving column 7, the buffer column 13 and the air cylinder 10 and the pressure sensing diaphragm 3, and the soft pads 11 are fixedly connected with the receiving column 7, the buffer column 13 and the output end of the air cylinder 10 through screws, so that the rigid impact force of the output ends of the receiving column 7, the buffer column 13 and the air cylinder 10 on the pressure sensing diaphragm 3 is reduced, the deformation of the pressure sensing diaphragm 3 is avoided, the service life of the differential pressure transmitter is prolonged, the exhaust pipe 27 is arranged at the lower side of the guide pillar 21, the closest distance between one end of the disc 18 close to the air input pipe 16 and the exhaust pipe 27 is consistent with the linear distance between the pressure lever 23 and the control switch 25, so that the exhaust and the alarm can be synchronous, the pressure sensing diaphragm 3 is attached to the inner wall of the air pressure receiving pipe 2, the sealing performance is ensured, the measurement result is more accurate, the fixing plate 19 is arranged at one side, the control switch 25 is a self-reset control switch so that the automatic closing of the audible alarm 26 can be realized after the pressure relief is completed.
The utility model discloses can realize in time disappointing the protection when gas pressure transships to avoid differential pressure transmitter to damage, can also measure reinforcing differential pressure transmitter's measuring range to less atmospheric pressure.
Above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides a gaseous differential pressure transmitter, includes casing (1), its characterized in that, casing (1) interior middle part is fixed with atmospheric pressure receiver tube (2), both ends are sealed about atmospheric pressure receiver tube (2), and the inner wall sliding connection of atmospheric pressure receiver tube (2) has pressure sensing diaphragm (3), top surface central point puts still to be fixed with LED converter (4) in atmospheric pressure receiver tube (2), casing (1) upper portion still is fixed with digital display screen (5), and the output of LED converter (4) passes through the wire with the input of digital display screen (5) and is connected, the lower terminal surface middle part of LED converter (4) passes through screw fixed connection receiving cylinder (6), and receiving cylinder (6) inner wall sliding connection has receiving column (7), and the lower extreme fixed connection of receiving column (7) is on pressure sensing diaphragm (3), still install pressure sensing chip (8) on the interior top surface of receiving cylinder (6), a first pressure sensing spring (9) is fixedly connected between the upper end of the receiving column (7) and the pressure sensing chip (8), two sides of the inner bottom surface of the air pressure receiving tube (2) are fixedly connected with air cylinders (10) through screws, and the output ends of the air cylinders (10) are attached to the lower end face of the pressure sensing film (3);
two sides of the inner top surface of the air pressure receiving pipe (2) are fixedly connected with a buffer cylinder (12) through screws, and the buffer cylinder (12) is connected with a buffer column (13) in a sliding way, the lower end of the buffer column (13) is fixedly connected on the pressure sensing film (3), a buffer spring (14) is fixed between the buffer column (13) and the inner bottom surface of the buffer cylinder (12), slide blocks (15) are fixed on two sides of the upper end of the buffer column (13) through screws, sliding grooves are arranged on two sides of the inner wall of the buffer cylinder (12), the sliding block (15) is connected in the sliding grooves in a sliding manner, the center of the lower end surface of the air pressure receiving pipe (2) is also connected with an air input pipe (16) in a penetrating way, the lower end of the air input pipe (16) extends to the outer side of the shell (1), one side of the lower end of the gas input pipe (16) is connected with a pressure relief pipe (17) in a penetrating manner, and the pressure relief pipe (17) is positioned outside the shell (1);
the pressure relief pipe is characterized in that the inner wall of the pressure relief pipe (17) is connected with a disc (18) in a sliding manner and is fixedly provided with a fixing plate (19) through a screw, a second pressure sensing spring (20) is fixedly connected between the fixing plate (19) and the disc (18), guide pillars (21) are fixedly arranged on the end face, close to the fixing plate (19), of one side of the disc (18) through a screw, the two guide pillars (21) are symmetrical about the horizontal center line of the disc (18), one end of each guide pillar (21) penetrates through the fixing plate (19) and is fixedly connected with a pressing plate (22) through a screw at the end part, the center position, far away from the fixing plate (19), of one side of the pressing plate (22) is fixedly connected with a pressing rod (23) through a screw, one side, far away from the fixing plate (19), of the inner wall of the pressure relief pipe (, audible alarm (26) are installed to the other end of mounting panel (24), pressure release pipe (17) lower extreme middle part still through connection has blast pipe (27), and installs control valve (28) on blast pipe (27).
2. The differential pressure transmitter according to claim 1, wherein soft pads (11) are arranged between the output ends of the receiving column (7), the buffer column (13) and the cylinder (10) and the pressure sensing diaphragm (3), and the soft pads (11) are fixedly connected with the output ends of the receiving column (7), the buffer column (13) and the cylinder (10) through screws.
3. The differential gas pressure transmitter according to claim 1, wherein the exhaust pipe (27) is located on the lower side of the guide post (21), and the closest distance from the exhaust pipe (27) to one end of the disk (18) close to the gas input pipe (16) is consistent with the linear distance between the pressure rod (23) and the control switch (25).
4. The differential pressure transmitter as claimed in claim 1, wherein the pressure sensing diaphragm (3) is attached to the inner wall of the pressure receiving pipe (2).
5. A gas differential pressure transmitter according to claim 1, characterized in that the fixing plate (19) is located on the side of the disc (18) remote from the gas inlet pipe (16).
6. A gas differential pressure transmitter according to claim 1, characterized in that the control switch (25) is a self-resetting control switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921163582.XU CN210198626U (en) | 2019-07-23 | 2019-07-23 | Gas differential pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921163582.XU CN210198626U (en) | 2019-07-23 | 2019-07-23 | Gas differential pressure transmitter |
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| Publication Number | Publication Date |
|---|---|
| CN210198626U true CN210198626U (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921163582.XU Active CN210198626U (en) | 2019-07-23 | 2019-07-23 | Gas differential pressure transmitter |
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| CN (1) | CN210198626U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111487008A (en) * | 2020-04-22 | 2020-08-04 | 广东电网有限责任公司 | Air pressure locking device for online detection of sulfur hexafluoride gas pressure |
| CN112326102A (en) * | 2020-10-21 | 2021-02-05 | 林荣富 | Dustproof pressure sensor and application method thereof |
-
2019
- 2019-07-23 CN CN201921163582.XU patent/CN210198626U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111487008A (en) * | 2020-04-22 | 2020-08-04 | 广东电网有限责任公司 | Air pressure locking device for online detection of sulfur hexafluoride gas pressure |
| CN112326102A (en) * | 2020-10-21 | 2021-02-05 | 林荣富 | Dustproof pressure sensor and application method thereof |
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