CN211291856U

CN211291856U - Sanitary pressure transmitter

Info

Publication number: CN211291856U
Application number: CN201921676654.0U
Authority: CN
Inventors: 陈怡因
Original assignee: Ema Electronic Suzhou Co ltd
Current assignee: Ema Electronic Suzhou Co ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-08-18
Anticipated expiration: 2029-10-09

Abstract

The utility model discloses a sanitary-grade pressure transmitter, include: cable joint, casing and probe are equipped with the circuit part of control pressure transmitter work in the casing, and the probe includes: the probe comprises a probe main body, wherein the outer wall of the top end of the probe main body is provided with an upper ring of clamping groove and a lower ring of clamping groove, a sealing ring is arranged in the upper clamping groove, a sealing gasket is arranged in the lower clamping groove, and the top end of the probe main body is fixedly connected with a shell in an interference fit manner; the lower part of the probe main body is fixedly connected with the adapter, the outer wall of the lower part of the probe main body is provided with a groove and a step, a sealing gasket is arranged in the groove, and a sealing ring is arranged in the step; the adapter, the lower part fixed connection of adapter and probe main part, and the surface of adapter is the smooth surface. The utility model discloses can satisfy the health trade field, the adapter has multiple form, and the installation demand of different operating modes can be satisfied with the adapter combination of difference to the probe main part.

Description

Sanitary pressure transmitter

Technical Field

The utility model relates to a sanitary-grade pressure transmitter.

Background

The pressure transmitter is used in a pressure monitoring system, generates a detection signal when the pressure in the system changes, converts the detection signal into a corresponding analog voltage and current signal through the signal processing module, or outputs a corresponding alarm signal according to different alarm point settings, and is used for detecting the pressure of the system and protecting the system. The general pressure transmitter has single output signal, is easy to be interfered by the outside, has low precision, mostly takes integral encapsulation as the main part, has complex process, high cost and inconvenient maintenance, can ensure the tightness and the water resistance, but can not resist acid and alkali and corrosion, can not be used in the high-temperature and high-pressure environment, and has limited application field.

The traditional pressure transmitter probe is almost installed by threads, the installation surface cannot be guaranteed to be a plane after installation, dirt and dirt are easily hidden in some non-planar positions, and the traditional pressure transmitter probe cannot be waterproof, dustproof and antifouling and cannot be applied to some special industries such as the fields of medical treatment, food and sanitation; in addition, the existing pressure transmitter probe is limited by the structure, the times of overload pressure impact are limited, and the service cycle is not very long. Meanwhile, the existing pressure transmitter probe cannot be applied to high-temperature, high-pressure and strong-corrosion environments.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a sanitary-grade pressure transmitter.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a sanitary pressure transmitter comprising: cable joint, casing and probe, cable joint packs into from the upper portion of casing, and cable joint and the inner wall fixed connection of casing are equipped with the circuit part of control pressure transmitter work in the casing, and the probe includes:

the probe comprises a probe main body, wherein the outer wall of the top end of the probe main body is provided with an upper ring of clamping grooves and a lower ring of clamping grooves, a first sealing ring is arranged in the upper clamping ring, a first sealing gasket is arranged in the lower clamping ring, and the top end of the probe main body is fixedly connected with a shell in an interference fit manner;

a first internal thread blind hole is formed in the center of the end of the probe body, a pressing ring is mounted on the first internal thread blind hole, a step is arranged at the bottom of the first internal thread blind hole, a second sealing ring is placed on the inner wall of the step, and the step is used for placing a pressure detection unit;

the outer wall of the middle part of the probe main body is provided with two symmetrical wrench screwing clamping grooves, the central position of one wrench screwing clamping groove is provided with an air vent, a breathable film is adhered on the air vent, a breathable gland is arranged outside the breathable film, and the breathable gland is fixedly connected with the air vent in an interference fit manner;

the lower part of the probe main body is fixedly connected with the adapter, the outer wall of the lower part of the probe main body is provided with a groove and a step, a second sealing gasket is arranged in the groove, and a third sealing ring is arranged in the step;

the adapter, the lower part fixed connection of adapter and probe main part, and the surface of adapter is the smooth surface.

The utility model provides a pair of sanitary-grade pressure transmitter, this changer's probe mainly used sanitary-grade corrosion-resistant type pressure transmitter, be applicable to high temperature, high pressure, in the environment of strong corruption, overload pressure in succession strikes and can reach more than 10 ten thousand, be not restricted to in general industrial field, because adapter and probe main part do not have any space after connecting, and the adapter surface is the smooth surface, no thread groove spills, easy washing, can not appear wasing the dead angle, can not hide dirty dirt, reach the sanitary-grade standard, can satisfy the health industry field, the adapter has multiple form, the installation demand of different operating modes can be satisfied with the adapter combination of difference to the probe main part.

On the basis of the technical scheme, the following improvements can be made:

as preferred scheme, be equipped with one section screw thread at the outer wall of probe main part lower part, adapter and probe main part screw thread fixed connection, and be equipped with the recess in screw thread and probe main part junction, be equipped with the step at the lower extreme of screw thread, place the third sealed pad in the recess, place the fourth sealing washer in the step.

Adopt above-mentioned preferred scheme, adapter and probe main part junction no thread groove spill, and easy the washing can not appear wasing the dead angle, can not hide dirty and contain dirt, reaches the sanitary-grade standard, can satisfy the health trade field.

Preferably, the vent hole is an inward-concave circular concave hole, a circular through hole is formed in the center of the concave hole, the vent gland is cylindrical, and the circular through hole is formed in the center of the cylinder.

By adopting the preferable scheme, the structure is more attractive.

Preferably, the probe is a cylinder, a circular hole is arranged on the side wall of the upper end face of the probe, the aperture of the circular hole is less than or equal to 1.5mm, and the circular hole is used for grounding wires.

By adopting the preferable scheme, the anti-interference capability of the product is enhanced.

Preferably, a plastic part for fixing the circuit part is arranged in the housing, the plastic part is semi-elliptical, and a plurality of bayonets for fixing the circuit part are respectively arranged at the upper part and the lower part of the inner wall of the plastic part.

Adopt above-mentioned preferred scheme, the plastic part is used for fixed circuit structure, plays anti-vibration, shielding, anti-jamming effect.

As a preferable scheme, the circuit part comprises a pressure detection unit, a signal processing unit and a signal output unit;

the signal processing unit comprises a singlechip;

the pressure detection unit comprises a pressure sensing circuit and an A/D conversion circuit;

the signal output unit comprises voltage output, current output and alarm point output, the pressure sensing circuit is electrically connected with the input end of the single chip microcomputer through the A/D conversion circuit, and the output end of the single chip microcomputer is electrically connected with the input end of the signal output unit.

By adopting the preferable scheme, the circuit part has reasonable structure.

Preferably, the pressure sensing circuit is further electrically connected to a temperature compensation circuit, and the temperature compensation circuit includes: the digital temperature sensing chip comprises a thermistor and a digital temperature sensing chip, wherein the thermistor is also connected with a shunt resistor in parallel, the shunt resistor is calibrated by laser, and the output end of the digital temperature sensing chip is electrically connected with the input end of the singlechip.

By adopting the preferable scheme, the circuit part has reasonable structure.

Preferably, the output end of the pressure detection unit is electrically connected with the input end of the signal processing unit, and the output end of the signal processing unit is electrically connected with the input end of the signal output unit.

By adopting the preferable scheme, the structure of the circuit part is more reasonable.

As a preferred scheme, the circuit part also comprises a keyboard input module, and the keyboard input module is electrically connected with the single chip microcomputer.

By adopting the preferable scheme, the keyboard input module can arbitrarily set different alarm points and output delay time according to the requirements of the site.

Preferably, the adapter is a welding adapter or a chuck adapter.

With the above preferred solution, the adapter may also be an adapter of another form.

Drawings

Fig. 1 is an exploded view of a sanitary pressure transmitter according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a sanitary pressure transmitter according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a probe portion of a sanitary pressure transmitter according to an embodiment of the present invention.

Fig. 4 is a block diagram of a circuit portion of a sanitary pressure transmitter according to an embodiment of the present invention.

Wherein: 1. a cable joint; 2. a housing; 3. a probe; 31. a probe body; 311. a card slot; 312. a wrench slot; 32. an adapter; 201. a plastic part; 202. a circuit portion; 301. a first seal ring; a first gasket; 303. pressing a ring; 304. a pressure detection unit; 305. a second seal ring; 306. a gas permeable membrane; 307. a gas-permeable gland; 308. a second gasket; 309. and a third sealing ring.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Please refer to fig. 1 to 4. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

In order to achieve the object of the invention, in some of its embodiments,

as shown in fig. 1-3, a sanitary pressure transmitter includes: cable joint 1, casing 2 and probe 3, cable joint 1 is packed into from the upper portion of casing 2, and cable joint 1 is fixed with the inner wall of casing 2 through the nut and is locked, is equipped with the circuit part 202 of control pressure transmitter work in casing 2, and probe 3 includes:

the probe comprises a probe body 31, wherein an upper ring clamping groove 311 and a lower ring clamping groove 311 are arranged on the outer wall of the top end of the probe body 31, a first sealing ring 301 is arranged in an upper clamping ring, a first sealing gasket 302 is arranged in a lower clamping ring, and the top end of the probe body 31 is fixedly connected with a shell 2 in an interference fit manner;

a first internal thread blind hole is formed in the center of the end of the probe body 31, a pressing ring 303 is arranged on the first internal thread blind hole, a step is arranged at the bottom of the first internal thread blind hole, a second sealing ring 305 is placed on the inner wall of the step, and the step is used for placing a pressure detection unit 304;

the outer wall of the middle part of the probe main body 31 is provided with two symmetrical wrench screwing clamping grooves 312, the central position of one wrench screwing clamping groove 312 is provided with an air hole, a breathable film 306 is adhered on the air hole, a breathable gland 307 is arranged outside the breathable film 306, and the breathable gland 307 is fixedly connected with the air hole in an interference fit manner;

the lower part of the probe main body 31 is fixedly connected with the adapter 32, the outer wall of the lower part of the probe main body 31 is provided with a groove and a step, a second sealing gasket 308 is arranged in the groove, and a third sealing ring 309 is arranged in the step;

and the adapter 32 is fixedly connected with the lower part of the probe body 31, and the outer surface of the adapter 32 is a smooth surface.

The central position department of one of them spanner draw-in groove 312 is equipped with the bleeder vent, paste ventilated membrane 306 on the bleeder vent, ventilated membrane 306 is equipped with ventilative gland 307 outward, ventilative gland 307 is installed from ventilated membrane 306 upper portion, with bleeder vent interference fit fixed connection, and this kind of structure mainly keeps inside and outside atmospheric pressure balanced, plays waterproof, dustproof, the effect of release.

The utility model provides a pair of sanitary-grade pressure transmitter, the probe mainly used sanitary-grade corrosion-resistant type pressure transmitter of this changer, be applicable to high temperature, high pressure, in the environment of strong corruption, overload pressure in succession strikes and can reach more than 10 ten thousand, be not restricted to general industrial field, because adapter 32 and probe main part 31 do not have any space after connecting, and adapter 32 surface is the smooth surface, no thread groove spills, easy washing, can not appear wasing the dead angle, can not hide dirty dirt, reach the sanitary-grade standard, can satisfy the sanitary industry field, adapter 32 has multiple form, the installation demand of different operating modes can be satisfied in probe main part 31 and the adapter 32 combination of difference.

In order to further optimize the utility model discloses an implement the effect, in some other embodiments, all the other characteristic techniques are the same, and the difference lies in, is equipped with one section screw thread at the outer wall of probe main part 31 lower part, adapter 32 and probe main part 31 screw thread fixed connection, and is equipped with the recess in screw thread and probe main part 31 junction, is equipped with the step at the lower extreme of screw thread, places the third sealed pad in the recess, places the fourth sealing washer in the step.

By adopting the preferable scheme, the connecting part of the adapter 32 and the probe main body 31 is free of threaded groove leakage, is easy to clean, is free from cleaning dead angles, can not store dirt and scale, reaches the sanitary standard, and can meet the field of the sanitary industry.

In order to further optimize the utility model discloses an implement the effect, in some other embodiments, all the other feature technologies are the same, and the difference lies in, and the bleeder vent is an inside sunken circular shrinkage pool, has a circular shape through-hole at the center of shrinkage pool, and gland 307 is the cylinder shape, and is equipped with a circular shape through-hole in the center department of cylinder.

By adopting the preferable scheme, the structure is more attractive.

In order to further optimize the utility model discloses an implement the effect, in some other embodiments, all the other characteristic techniques are the same, and the difference lies in, and the probe is the cylinder, is equipped with a round hole on the up end limit wall of probe, and the aperture of round hole is less than or equal to 1.5mm, and the round hole is used for the earth connection.

Preferably, a plastic part 201 for fixing the circuit part 202 is provided in the housing 2, the plastic part 201 is in a semi-elliptical shape, and 4 bayonets for fixing the circuit part 202 are provided at upper and lower portions of an inner wall of the plastic part 201, respectively.

By adopting the above preferred scheme, the plastic part 201 is used for fixing the circuit structure, and plays roles of vibration resistance, shielding and interference resistance. Moreover, in other embodiments, the circuit portion 202 only contacts with the 4 bayonet portions of the plastic part 201, and the other portions do not contact, so that the heat dissipation effect of the circuit portion 202 is better. In order to further improve the shock-proof effect of the circuit portion 202, an elastic block may be mounted on the bayonet of the plastic part 201, a slot is provided on the elastic block, and the terminal pin of the circuit portion 202 is mounted in the slot.

In order to further increase the installation speed of the plastic part 201, the end portion of the plastic part 201 is formed by a multi-section plastic elastic sheet, and when the plastic part 201 is installed in the housing, the end portion can deform, so that the installation is faster.

As shown in fig. 4, in order to further optimize the implementation effect of the present invention, in other embodiments, the rest of the feature technologies are the same, except that the circuit portion 202 includes a pressure detection unit 304, a signal processing unit, and a signal output unit;

the signal processing unit comprises a singlechip;

the pressure detection unit 304 includes a pressure sensing circuit and an a/D conversion circuit;

Further, the pressure sensing circuit is still connected with the temperature compensation circuit electricity, and the temperature compensation circuit includes: the digital temperature sensing chip comprises a thermistor and a digital temperature sensing chip, wherein the thermistor is also connected with a shunt resistor in parallel, the shunt resistor is calibrated by laser, and the output end of the digital temperature sensing chip is electrically connected with the input end of the singlechip.

Further, the output end of the pressure detection unit 304 is electrically connected to the input end of the signal processing unit, and the output end of the signal processing unit is electrically connected to the input end of the signal output unit.

With the above preferred scheme, the circuit portion 202 has a more reasonable structure.

Further, the circuit portion 202 further comprises a keyboard input module, and the keyboard input module is electrically connected with the single chip microcomputer.

The pressure sensing circuit is formed by printing a piezoresistor on the back surface of the diaphragm to form a Wheatstone bridge, and the output of the bridge is connected with the singlechip after passing through the A/D conversion circuit; the pressure sensing circuit is also connected with a temperature compensation circuit; the temperature compensation circuit is formed by connecting a thermistor in series or in parallel (in the embodiment, the thermistor is connected in parallel) on a Wheatstone bridge, and a shunt resistor is also connected in parallel on the thermistor; calibrating the shunt resistor by laser; the single chip microcomputer is also connected with a temperature compensation circuit, the circuit comprises a digital temperature sensing chip, and the output of the chip is connected with the input end of the single chip microcomputer. Because an intelligent single chip microcomputer is adopted and the sampling speed can be adjusted according to different requirements through software optimization, the pressure detection unit 304 senses the pressure on the spot, the pressure value on the spot is converted into the analog quantity of 0-10V and 4-20mA for output through circuit processing and intelligent operation, and a user can also set different alarm points and output delay time at will according to the requirements on the spot by matching with an input keyboard.

In order to further optimize the performance of the present invention, in other embodiments, the remaining features are the same, except that adapter 32 is a welding adapter or a chuck adapter.

With the above preferred embodiment, the adapter may be in various forms, and may be in other forms.

To sum up, the utility model provides a sanitary-grade pressure transmitter is applicable to high temperature, high pressure, in the environment of strong corruption, and continuous overload pressure strikes and can reach more than 10 ten thousand times, is not restricted to general industrial field, can satisfy the health trade field, and adapter 32 has multiple form, and the probe can satisfy the installation demand of different work condition with the adapter 32 combination of difference. The interference fit non-encapsulation structure is adopted, corrosion resistance, acid and alkali resistance are realized, reliability is high, anti-interference capability is high, and the protection grade can reach IP68 and IP 69K; the plastic part 201 structure is adopted, so that the vibration resistance, shielding and anti-interference capability of the product are enhanced; meanwhile, the sanitary corrosion-resistant pressure transmitter can measure liquid and gas, has various output modes, can delay output, has a simple structure and is convenient to maintain.

Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

With regard to the preferred embodiments of the present invention, it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the inventive concept, and these are within the scope of the present invention.

Claims

1. A sanitary pressure transmitter comprising: cable joint, casing and probe, cable joint follow the upper portion of casing is adorned, cable joint with the inner wall fixed connection of casing is equipped with the circuit part of control pressure transmitter work in the casing, its characterized in that, the probe includes:

the probe comprises a probe main body, wherein an upper ring of clamping grooves and a lower ring of clamping grooves are formed in the outer wall of the top end of the probe main body, a first sealing ring is arranged in the upper clamping ring, a first sealing gasket is arranged in the lower clamping ring, and the top end of the probe main body is fixedly connected with the shell in an interference fit manner;

the outer wall of the middle part of the probe main body is provided with two symmetrical wrench screwing clamping grooves, the central position of one wrench screwing clamping groove is provided with an air hole, a breathable film is adhered on the air hole, a breathable gland is arranged outside the breathable film, and the breathable gland is fixedly connected with the air hole in an interference fit manner;

the adapter is fixedly connected with the lower part of the probe body, the outer surface of the adapter is a smooth surface,

a plastic part used for fixing the circuit part is arranged in the shell and is in a semi-elliptical shape, a plurality of bayonets used for fixing the circuit part are respectively arranged at the upper part and the lower part of the inner wall of the plastic part, an elastic block is arranged on each bayonet of the plastic part, a clamping groove is arranged on each elastic block, and an end pin of the circuit part is arranged in each clamping groove;

and the end part of the plastic part is composed of a multi-section plastic elastic sheet.

2. The sanitary pressure transmitter according to claim 1, wherein a section of thread is provided on an outer wall of a lower portion of the probe body, the adapter is in threaded connection with the probe body, a groove is provided at a connection portion of the thread and the probe body, a step is provided at a lower end of the thread, a third sealing gasket is placed in the groove, and a fourth sealing gasket is placed in the step.

3. The sanitary pressure transmitter of claim 1 wherein the vent is an inwardly recessed circular recess having a circular through hole at the center thereof, the vent cover is cylindrical in shape and a circular through hole is provided at the center thereof.

4. The sanitary pressure transmitter according to claim 1, wherein the probe is a cylinder, a circular hole is formed in a side wall of an upper end face of the probe, the diameter of the circular hole is less than or equal to 1.5mm, and the circular hole is used for a grounding wire.

5. The sanitary pressure transmitter according to claim 1, wherein the circuit part includes a pressure detecting unit, a signal processing unit, and a signal output unit;

the signal processing unit comprises a singlechip;

the pressure sensing circuit is electrically connected with the input end of the single chip microcomputer through the A/D conversion circuit, and the output end of the single chip microcomputer is electrically connected with the input end of the signal output unit.

6. The sanitary pressure transmitter of claim 5 wherein the pressure sensing circuit is further electrically connected to a temperature compensation circuit, the temperature compensation circuit comprising: the temperature-sensing circuit comprises a thermistor and a digital temperature-sensing chip, wherein the thermistor is also connected with a shunt resistor in parallel, the shunt resistor is calibrated by laser, and the output end of the digital temperature-sensing chip is electrically connected with the input end of the singlechip.

7. The sanitary pressure transmitter of claim 6, wherein the output of the pressure detection unit is electrically connected to the input of the signal processing unit, and the output of the signal processing unit is electrically connected to the input of the signal output unit.

8. The sanitary pressure transmitter of claim 7 wherein the circuit portion further comprises a keypad input module electrically connected to the single chip.

9. Sanitary pressure transmitter according to any of claims 1-8, characterized in that the adapter is a welding adapter or a cartridge adapter.