阅读说明：本技术 一种差压变送器 (Differential pressure transmitter ) 是由 刘亚青 于 2019-09-27 设计创作，主要内容包括：本发明一种差压变送器,包括变送器壳体、电路板、信号输出端子、显示屏和感压膜片,所述变送器壳体顶端右侧设有信号输出端子,所述变送器壳体正面设有显示屏,所述显示屏外侧设有保护环体,所述变送器壳体内部还设有电路板,此差压变送器,在感压膜片外侧设置透水保护板,避免了管道沉积物弹出对感压膜片的冲击破坏,提高其使用寿命,同时环形防水塞设置,有效地避免了感压腔内液体泄漏,影响测量结果,同时保持变送器壳体内部干燥,保护了其内部电子元件,连接组件和变送器壳体通过转轴转动连接,可随意调节显示屏朝向,方便使用人员观察。(The invention relates to a differential pressure transmitter, which comprises a transmitter shell, a circuit board, a signal output terminal, a display screen and a pressure sensing diaphragm, wherein the signal output terminal is arranged on the right side of the top end of the transmitter shell, the display screen is arranged on the front side of the transmitter shell, a protection ring body is arranged on the outer side of the display screen, the circuit board is also arranged in the transmitter shell, a water permeable protection plate is arranged on the outer side of the pressure sensing diaphragm, impact damage to the pressure sensing diaphragm caused by ejection of pipeline deposits is avoided, the service life of the differential pressure transmitter is prolonged, meanwhile, an annular waterproof plug is arranged, liquid leakage in a pressure sensing cavity is effectively avoided, the measurement result is influenced, meanwhile, the interior of the transmitter shell is kept dry, internal electronic elements are protected, a connecting component and the transmitter shell are rotatably connected through a rotating shaft.)

1. The differential pressure transmitter comprises a transmitter shell (1), a circuit board (2), a signal output terminal (3), a display screen (5) and a pressure sensing diaphragm (11), and is characterized in that the signal output terminal (3) is arranged on the right side of the top end of the transmitter shell (1), the display screen (5) is arranged on the front side of the transmitter shell (1), a protection ring body (4) is arranged on the outer side of the display screen (5), the circuit board (2) is also arranged inside the transmitter shell (1), a damp-proof fixed plate (6) is arranged below the circuit board (2), the periphery of the damp-proof fixed plate (6) is fixed on the inner wall of the transmitter shell (1), a connecting component (10) is also arranged below the transmitter shell (1), a rotating shaft (7) is fixedly connected to the upper end of the connecting component (10), and the top end of the rotating shaft (7), connecting discs (8) are arranged at two ends of the connecting component (10), a pipeline interface (9) and a bolt hole (13) are arranged on each connecting disc (8), a liquid conveying branch pipe (14) is arranged on the inner side of each pipeline interface (9), the other end of the liquid feeding branch pipe (14) is provided with arc masks (16), a pressure sensing cavity (15) is formed between the arc masks (16), a pressure sensing film (11) is vertically arranged in the pressure sensing cavity (15), two sides of the pressure sensing film (11) are respectively provided with a permeable protection plate (17), a plurality of capillary through holes (19) are arranged on the water permeable protection plate (17), annular waterproof plugs (18) are also arranged on the peripheries of the pressure sensing membrane (11), the water permeable protection plate (17) and the arc cover (16), the lower part of the connecting component (10) is also provided with a placing base (12), and the placing base (12) is fixedly connected with the bottom end of the connecting disc (8).

2. The differential pressure transmitter according to claim 1, wherein the circuit board (2) is electrically connected to the output terminal (3), the display screen (5) and the pressure sensing diaphragm (11), respectively.

3. Differential pressure transmitter according to claim 1, characterized in that the annular watertight plug (18) is arranged in a cross-section in a zigzag manner.

4. Differential pressure transmitter according to claim 1, characterized in that the bolt holes (13) on the connection plate (8) are arranged symmetrically with respect to the pipe connection (8).

5. The differential pressure transmitter as claimed in claim 1, wherein a gap exists between the water permeable protection plate (17) and the pressure sensing diaphragm (11), and the two are equal in size and shape.

Technical Field

The invention relates to the technical field of transmitters, in particular to a differential pressure transmitter.

Background

The differential pressure transmitter is a transmitter for measuring the pressure difference between two ends of the transmitter and outputs a standard signal, and is different from a common pressure transmitter in that the differential pressure transmitter is provided with two pressure interfaces, the differential pressure transmitter is generally divided into a positive pressure end and a negative pressure end, the pressure of the positive pressure end of the differential pressure transmitter can be measured only when being larger than the pressure of the negative pressure section, and the differential pressure transmitter is used for measuring the liquid level, the density and the pressure of liquid, gas and steam and then converting the liquid, the density and the pressure into a current signal for outputting.

At present, differential pressure transmitters in the market often ignore the protection of pressure sensing diaphragms, and if the pipelines are not kept smooth in use, sediments in the pipelines can pop out and damage the pressure sensing diaphragms.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a differential pressure transmitter to improve the problems in the background technology.

In order to improve the problems, the invention is embodied by the following technical scheme: a differential pressure transmitter comprises a transmitter shell, a circuit board, a signal output terminal, a display screen and a pressure sensing film, wherein the signal output terminal is arranged on the right side of the top end of the transmitter shell, the display screen is arranged on the front side of the transmitter shell, a protection ring body is arranged on the outer side of the display screen, the circuit board is also arranged inside the transmitter shell, a moisture-proof fixed plate is arranged below the circuit board, the periphery of the moisture-proof fixed plate is fixed on the inner wall of the transmitter shell, a connecting assembly is further arranged below the transmitter shell, a rotating shaft is fixedly connected to the upper end of the connecting assembly, the top end of the rotating shaft is rotatably connected to the bottom surface of the transmitter shell, connecting plates are arranged at the two ends of the connecting assembly, a pipeline interface and a bolt hole are arranged on the connecting plates, the vertical pressure sensing diaphragm that is equipped with of pressure sensing intracavity portion, pressure sensing diaphragm both sides all are equipped with the protection shield that permeates water, are equipped with a plurality of capillary through-holes on the protection shield that should permeate water, pressure sensing diaphragm, the protection shield that permeates water and arc surface cover periphery still are equipped with annular waterproof plug, coupling assembling below still is equipped with places the base, should place base and connection pad bottom fixed connection.

As a preferred embodiment of the present invention, the circuit board is electrically connected to the output terminal, the display screen and the pressure sensing film, respectively.

In a preferred embodiment of the present invention, the annular waterproof plug has a concave cross section.

In a preferred embodiment of the present invention, the bolt holes on the connecting disc are symmetrically arranged relative to the pipe joint.

In a preferred embodiment of the present invention, a gap is formed between the permeable protection plate and the pressure sensing membrane, and the permeable protection plate and the pressure sensing membrane are equal in size and shape.

The invention has the beneficial effects that:

1. this differential pressure transmitter sets up the protection shield that permeates water in the pressure sensing diaphragm outside, has avoided the pipeline deposit to pop out the impact destruction to the pressure sensing diaphragm, improves its life, and the waterproof stopper setting of annular has simultaneously avoided pressure sensing intracavity liquid to leak effectively, influences the measuring result, keeps the inside drying of changer casing simultaneously, has protected its inside electronic component.

2. According to the differential pressure transmitter, the moisture-proof fixing plate is arranged in the transmitter shell to fix the circuit board, so that the circuit board is prevented from being damaged due to shaking, meanwhile, the influence of lower moist gas on the circuit board can be isolated, the occurrence of faults of the circuit board is reduced, and the service life is prolonged; and coupling assembling and changer casing rotate through the pivot to be connected, can adjust the display screen orientation at will, make things convenient for the user to observe.

The invention makes up for the defects in the background technology to a certain extent.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a differential pressure transmitter of the present invention that is easy to install;

fig. 2 is a detailed schematic diagram of a pressure sensing diaphragm of a pressure transmitter convenient to install according to the invention.

In the figure: 1. a transmitter housing; 2. a circuit board; 3. a signal output terminal; 4. a protective ring body; 5. a display screen; 6. a moisture-proof fixing plate; 7. a rotating shaft; 8. a connecting disc; 9. a pipe interface; 10. a connecting assembly; 11. a pressure-sensitive film; 12. placing a base; 13. bolt holes; 14. a liquid feeding branch pipe; 15. a pressure sensing chamber; 16. an arc mask; 17. a water permeable protection plate; 18. an annular waterproof plug; 19. a capillary through hole.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

Referring to fig. 1 to 2, the present invention provides a technical solution: a differential pressure transmitter comprises a transmitter shell 1, a circuit board 2, a signal output terminal 3, a display screen 5 and a pressure sensing film 11, wherein the signal output terminal 3 is arranged on the right side of the top end of the transmitter shell 1, the display screen 5 is arranged on the front side of the transmitter shell 1, a protection ring body 4 is arranged on the outer side of the display screen 5, the circuit board 2 is further arranged inside the transmitter shell 1, a moisture-proof fixing plate 6 is arranged below the circuit board 2, the periphery of the moisture-proof fixing plate 6 is fixed on the inner wall of the transmitter shell 1, a connecting assembly 10 is further arranged below the transmitter shell 1, a rotating shaft 7 is fixedly connected to the upper end of the connecting assembly 10, the top end of the rotating shaft 7 is rotatably connected to the bottom surface of the transmitter shell 1, connecting discs 8 are arranged at two ends of the connecting assembly 10, pipeline interfaces 9, this send 14 other ends of liquid branch pipe to be equipped with arc face guard 16, form pressure sensing chamber 15 between the arc face guard 16, the inside vertical pressure sensing diaphragm 11 that is equipped with in pressure sensing chamber 15, pressure sensing diaphragm 11 both sides all are equipped with the protection shield 17 that permeates water, should permeate water and are equipped with a plurality of capillary through-holes 19 on the protection shield 17, pressure sensing diaphragm 11, permeate water still are equipped with annular waterproof stopper 18 on protection shield 17 and the 16 peripheries of arc face guard, coupling assembling 10 below still is equipped with places base 12, should place base 12 and 8 bottom fixed connection of connection pads.

The working principle is as follows: use this novel differential pressure transmitter, at first the liquid delivery pipe with waiting to measure the point passes through bolt hole 13 and fixes, leads to liquid and measures, and liquid gets into pressure-sensing chamber 15 by pipeline interface 9 and liquid delivery branch pipe 14, and then makes pressure-sensing diaphragm 11 take place deformation, changes the resistance in the pressure-sensing ware, and deformation conversion is the signal of telecommunication to carry to circuit board 2, and circuit board 2 handles the back with it, sends display signal to display screen 5, sends standard signal of telecommunication to signal output terminal 3 simultaneously.

In a preferred embodiment of the present invention, the circuit board 2 is electrically connected to the output terminals 3, the display screen 5 and the pressure sensing film 11.

In a preferred embodiment of the present invention, the annular waterproof plug 18 is disposed in a concave shape in cross section.

In a preferred embodiment of the present invention, the bolt holes 13 on the connecting plate 8 are symmetrically arranged relative to the pipe joint 8.

In a preferred embodiment of the present invention, a gap is formed between the permeable protection plate 17 and the pressure sensing membrane 11, and the two are equal in size and shape.

This differential pressure transmitter sets up the protection shield that permeates water in the pressure sensing diaphragm outside, has avoided the pipeline deposit to pop out the impact destruction to the pressure sensing diaphragm, improves its life, and the waterproof stopper setting of annular has simultaneously avoided pressure sensing intracavity liquid to leak effectively, influences the measuring result, keeps the inside drying of changer casing simultaneously, has protected its inside electronic component.

Compared with patents 201710745634.3, 201610241532.3 and 200980103337.2, the differential pressure transmitter is provided with a moisture-proof fixing plate inside a transmitter shell to fix a circuit board, so that the circuit board is prevented from being damaged due to shaking, meanwhile, the influence of lower moist gas on the circuit board can be isolated, the occurrence of faults of the circuit board is reduced, and the service life is prolonged; and coupling assembling and changer casing rotate through the pivot to be connected, can adjust the display screen orientation at will, make things convenient for the user to observe.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.