CN211740478U

CN211740478U - Diffused silicon pressure transmitter

Info

Publication number: CN211740478U
Application number: CN202020409819.4U
Authority: CN
Inventors: 刘洪泉
Original assignee: Wuxi Hengxin Measurement And Control Instrument Co ltd
Current assignee: Wuxi Hengxin Measurement And Control Instrument Co ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-10-23
Anticipated expiration: 2030-03-27

Abstract

The utility model discloses a diffusion silicon pressure transmitter, including gauge outfit and casing, the front end of gauge outfit is provided with digital display panel, digital display panel's lower extreme just is in the preceding terminal surface of gauge outfit is provided with the control key, the lower part at the gauge outfit is installed to the casing, the outer terminal surface both sides of casing are provided with the mount pad, the inner chamber of casing is provided with the pressure diaphragm, the upper end of pressure diaphragm just is in the inside of casing is provided with diffusion silicon pressure cell, diffusion silicon pressure cell with be provided with the pressure measurement chamber between the pressure diaphragm, the lower extreme of casing is provided with the probe, the lower extreme of pressure diaphragm with be provided with the test pipe between the inside bottom of probe, the inside lower extreme of test pipe is provided with the filter screen, the top of gauge outfit is provided with the wire tube interface. The utility model discloses the filter screen that utilizes probe internal design can prevent effectively that the impurity in the measured medium from getting into the casing inner chamber and destroying the pressure diaphragm, and the practicality is strong.

Description

Diffused silicon pressure transmitter

Technical Field

The utility model relates to a pressure test technical field specifically is a diffusion silicon pressure transmitter.

Background

The diffused silicon pressure transmitter has the advantages of reliable work, stable performance, convenient installation and use, small volume, light weight, high cost performance ratio and the like, and is widely applied to various positive and negative pressure measurements. The inlet diffusion silicon or the core body is used as a pressure detection element, and a sensor signal is converted into a 0-10mA or 4-20mA unified output signal through a high-performance electronic amplifier.

The working principle of the diffused silicon pressure transmitter is that a pressure sensor converts a pressure signal into an electric signal, the electric signal is amplified by a differential amplifier and an output amplifier, and finally the electric signal is converted into a 4-20mA standard current output signal which is in linear corresponding relation with the liquid level pressure of a medium (liquid) to be detected through V/A voltage current. However, the existing diffused silicon pressure transmitter is not designed and installed with a filtering device because impurities contained in a measured medium are not considered in the design process, and when media such as sewage are measured, some impurities in the sewage easily enter the measuring pipe and damage a pressure diaphragm, so that the measurement accuracy is affected. In addition, corrosive substances contained in the measured medium can also cause damage to the measuring guide pipe, so that the using effect of the diffused silicon pressure transmitter is poor, and the service life of the transmitter is shortened.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a diffusion silicon pressure transmitter to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a diffused silicon pressure transmitter comprises a gauge head and a shell, wherein a digital display panel is arranged at the front end of the gauge head, a control key is arranged at the lower end of the digital display panel and on the front end face of the gauge head, the shell is installed at the lower part of the gauge head, mounting seats are arranged on two sides of the outer end face of the shell, a pressure diaphragm is arranged in an inner cavity of the shell, a diffused silicon pressure measuring element is arranged at the upper end of the pressure diaphragm and in the shell, a pressure measuring cavity is arranged between the diffused silicon pressure measuring element and the pressure diaphragm, a probe is arranged at the lower end of the shell, a nut is movably arranged between the probe and the shell, a test conduit is arranged between the lower end of the pressure diaphragm and the inner bottom end of the probe, a filter screen is arranged inside the probe corresponding to the inner lower end of the test conduit, and a silica gel layer is arranged outside, the top of gauge outfit is provided with the connecting block, the right-hand member of connecting block is provided with the wire pipe interface.

Preferably, the mounting seat is provided with a mounting hole.

Preferably, the pressure membrane is made of a water-proof flexible material, and a silicon sheet is used.

Preferably, the lower end of the outer surface of the probe is provided with threads.

Preferably, the inner wall of the test conduit is provided with a corrosion protection layer.

Preferably, sealing gaskets are arranged at two ends of the pressure membrane.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model can effectively prevent the impurities in the measured sewage, air and other media from entering the inner cavity of the shell to destroy the pressure diaphragm through the filter screen designed and installed in the probe, thereby influencing the precision and having certain practicability;

2. the utility model discloses the simultaneous design is at the outside silica gel heat dissipation layer of test pipe, can dispel the heat effectively to the heat that produces in the use of diffusion silicon pressure transmitter, in addition, at the anti-corrosion coating of the inner wall design of test pipe, can prevent effectively that the corrosive substance that contains in the measured medium like sewage is to the destruction of casing internal element, and then can prolong diffusion silicon pressure transmitter's life, overall structure is simple, reasonable in design, and the practicality is strong, has advantages such as excellent in use effect.

Drawings

FIG. 1 is a schematic view of the overall structure of a diffused silicon pressure transmitter of the present invention;

FIG. 2 is a schematic diagram of an appearance structure of a diffused silicon pressure transmitter of the present invention;

FIG. 3 is a schematic structural diagram of a point A in FIG. 1 of the pressure transmitter of the present invention;

fig. 4 is an enlarged schematic structural diagram of B in fig. 1 of the diffused silicon pressure transmitter of the present invention.

In the figure: 1. a gauge head; 2. a digital display panel; 3. a control key; 4. a housing; 5. a mounting seat; 6. a pressure diaphragm; 7. a diffused silicon load cell; 8. a pressure measurement cavity; 9. a probe; 10. A nut; 11. testing the catheter; 12. filtering with a screen; 13. a silica gel heat dissipation layer; 14. connecting blocks; 15. A wire tube interface; 16. mounting holes; 17. a thread; 18. an anti-corrosion layer; 19. a gasket seal.

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. 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. 1-4, the present invention provides a technical solution: a diffused silicon pressure transmitter comprises a gauge head 1 and a shell 4, wherein a digital display panel 2 is embedded and installed at the front end of the gauge head 1, a control key 3 is embedded and installed at the lower end of the digital display panel 2 and at the front end face of the gauge head 1, the shell 4 is installed at the lower part of the gauge head 1, installation seats 5 are welded and installed at two sides of the outer end face of the shell 4, a pressure diaphragm 6 is fixedly installed in an inner cavity of the shell 4, a diffused silicon pressure measuring element 7 is welded and installed at the upper end of the pressure diaphragm 6 and in the shell 4, a pressure measuring cavity 8 is installed between the diffused silicon pressure element 7 and the pressure diaphragm 6, a probe 9 is welded and installed at the lower end of the shell 4, a nut 10 is movably installed between the probe 9 and the shell 4, a test conduit 11 is welded and installed between the lower end of the pressure diaphragm 6 and the inner bottom end of the probe 9, a, the test tube 11 is coated with a silica gel heat dissipation layer 13, the top of the gauge outfit 1 is fixedly welded with a connecting block 14, and the right end of the connecting block 14 is fixedly connected with a conduit interface 15.

A mounting hole 16 is reserved on the mounting seat 5, so that the diffused silicon pressure transmitter is convenient to disassemble and mount; the pressure membrane 6 is made of waterproof flexible material, and a silica gel sheet is used, so that liquid in the medium to be detected can be effectively prevented from entering the pressure measuring cavity 8 to damage internal elements; the lower end of the outer surface of the probe 9 is provided with a thread 17, so that the pressure transmitter is convenient to mount; the inner wall of the test conduit 11 is provided with the anti-corrosion layer 18, so that the corrosion damage of corrosive substances contained in the tested medium such as sewage to the inner test conduit 11 can be effectively prevented; sealing gaskets 19 are arranged at two ends of the pressure membrane 6, so that the good sealing performance of the whole diffusion silicon pressure transmitter can be ensured.

The working principle is as follows: when the utility model is used, firstly, the conduit is installed through the conduit interface 15, then, the conduit is installed on the measured medium through the screw thread 17 of the outer ring of the probe 9 in a screwing way, the diffused silicon pressure transmitter is fixed through the installation hole 16 on the installation seat 5, then, the transmitter is started through the control key 3 to carry out measurement, the obtained data can be displayed on the digital display panel 2 on the gauge outfit 1, in addition, the filter screen 12 which is installed inside the probe 9 can effectively filter the impurities contained in the measured medium, the pressure membrane 6 is protected, and the damage of the impurities to the pressure membrane 6 is prevented; the silica gel heat dissipation layer 13 of test pipe 11 outside coating in addition can carry out effective quick heat dissipation to measuring pipe, and then can effectively prolong diffusion silicon pressure transmitter's life, and the device overall design is reasonable, has advantages such as easy operation, convenient to use, result of use are good.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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. A diffused silicon pressure transmitter, includes gauge outfit (1) and casing (4), its characterized in that: the gauge head comprises a gauge head (1), a digital display panel (2) is arranged at the front end of the gauge head (1), a control key (3) is arranged at the lower end of the digital display panel (2) and on the front end face of the gauge head (1), a shell (4) is arranged at the lower part of the gauge head (1), mounting seats (5) are arranged on two sides of the outer end face of the shell (4), a pressure diaphragm (6) is arranged in an inner cavity of the shell (4), a diffused silicon pressure measuring element (7) is arranged at the upper end of the pressure diaphragm (6) and inside the shell (4), a pressure measuring cavity (8) is arranged between the diffused silicon pressure measuring element (7) and the pressure diaphragm (6), a probe (9) is arranged at the lower end of the shell (4), a nut (10) is movably arranged between the probe (9) and the shell (4), a test conduit (11) is arranged between the lower end of the pressure diaphragm (6) and the inner bottom end of the, the inside lower extreme of test pipe (11) corresponds probe (9) is inside to be provided with filter screen (12), the outside of test pipe (11) is provided with silica gel heat dissipation layer (13), the top of gauge outfit (1) is provided with connecting block (14), the right-hand member of connecting block (14) is provided with wire pipe interface (15).

2. The diffused silicon pressure transmitter of claim 1, wherein: and the mounting seat (5) is provided with a mounting hole (16).

3. The diffused silicon pressure transmitter of claim 1, wherein: the pressure membrane (6) is made of waterproof flexible materials and is made of a silica gel sheet.

4. The diffused silicon pressure transmitter of claim 1, wherein: the lower end of the outer surface of the probe (9) is provided with a thread (17).

5. The diffused silicon pressure transmitter of claim 1, wherein: the inner wall of the test conduit (11) is provided with an anti-corrosion layer (18).

6. The diffused silicon pressure transmitter of claim 1, wherein: sealing gaskets (19) are arranged at two ends of the pressure diaphragm (6).