CN216284076U - Pressure transmitter with high protection level - Google Patents

Abstract

The utility model discloses a pressure transmitter with high protection level, which comprises a gauge outfit, a detection bobbin and a pressure sensor assembly which are sequentially connected from top to bottom, wherein an adjusting circuit chamber and a control circuit chamber with open outer ends are arranged on the gauge outfit, the open ends of the adjusting circuit chamber and the control circuit chamber are respectively provided with a first end cover and a second end cover, the first end cover and the second end cover are respectively welded and assembled with the gauge outfit, the outside of the pressure sensor assembly is wrapped by a protective cover, and silica gel is filled between the inner side wall of the protective cover and the pressure sensor assembly. The utility model has the beneficial effects that: adopt the welding assembly between end cover and the gauge outfit, the pressure sensor subassembly is wrapped inside the protection casing by silica gel to make pressure transmitter whole have higher protection level and structural strength.

Description

Pressure transmitter with high protection level

Technical Field

The utility model belongs to the technical field of pressure transmitters, and particularly relates to a pressure transmitter with a high protection level.

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 has the main principle of pressure measurement: the pressure sensor assembly senses the air pressure or the hydraulic pressure of the working equipment, and then the pressure is converted into an electric signal through the measuring circuit, so that the purpose of measuring the pressure is achieved.

In the prior art, the structural design of the pressure transmitter focuses on how to optimize the overall layout of the pressure sensor assembly and the measurement circuit, and the pressure transmitter is not deeply designed in terms of strength and protection level, and only needs to be applicable to a general detection environment. Therefore, when the pressure transmitter is applied to severe environments such as high temperature, high pressure, rapid vibration, rapid temperature change or nuclear radiation, the transmitter has risks such as component looseness, sealing failure and the like when a measuring circuit is affected with moisture.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a pressure transmitter with high protection level, which can significantly improve the strength and the protection level of the pressure transmitter.

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

the utility model provides a pressure transmitter with high protection level, includes gauge outfit, detection bobbin and the pressure sensor subassembly that from top to bottom connects gradually, be equipped with equal open adjusting circuit cavity in outer end and control circuit cavity on the gauge outfit, the open end of adjusting circuit cavity and control circuit cavity disposes first end cover and second end cover respectively, and its key lies in: first end cover and second end cover all with gauge outfit welded assembly, the outside parcel of pressure sensor subassembly has the protection casing, and it has silica gel to fill between the inboard lateral wall of this protection casing and the pressure sensor subassembly.

By adopting the structure, the end cover and the gauge outfit are welded and assembled, and the pressure sensor assembly is coated inside the protective cover by the silica gel, so that the pressure transmitter integrally has higher protection grade and structural strength.

Preferably, the method comprises the following steps: the outer ends of the adjusting circuit cavity and the control circuit cavity are provided with annular sinking grooves, and the first end cover and the second end cover are welded on the corresponding annular sinking grooves. Adopt above-mentioned structure to the welded connection is convenient for.

Preferably, the method comprises the following steps: first end cover middle part is equipped with the regulation hole to lock through the bolt and have the blanking cover, regulation hole outer end is formed with first step groove and second step groove, the blanking cover is including hugging closely at the outside cap disc of first end cover, and stretch into the end cap in first step groove, the end cap is close to the end cap and is equipped with the sealing washer, and this sealing washer is located the second step inslot. By adopting the structure, under the condition that the requirement that the internal adjusting circuit can be adjusted is met, the size of the adjusting hole is reduced as much as possible, and the structural strength of a product is improved.

Preferably, the method comprises the following steps: the protective cover comprises a first cover shell and a second cover shell which are oppositely buckled, wherein avoidance notches are arranged at the ends, close to each other, of the upper portions of the first cover shell and the second cover shell, and the inner ends of the avoidance notches are respectively constructed into semicircular grooves which are adaptive to the outer diameter of the detection tube. By adopting the structure, the interference of the detection bobbin can be better avoided, and the product assembly is facilitated.

Preferably, the method comprises the following steps: the first and second housings are each of rectangular configuration. The structure is adopted, so that the assembly is convenient.

Preferably, the method comprises the following steps: the pressure sensor assembly comprises a pressure sensor and templates symmetrically arranged at two ends of the pressure sensor, and the first housing and the second housing are fixed on the templates through threaded connecting pieces. With the above structure, the first cover and the second cover are fixedly assembled.

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

by adopting the pressure transmitter with high protection level, the end cover and the gauge outfit are welded and assembled, so that the structural strength of the gauge outfit position of the pressure transmitter can be improved. The pressure sensor assembly is integrally wrapped by the protective cover, and the vibration-proof material made of silica gel is filled in the pressure sensor assembly, so that the vibration-proof performance and the protection grade of the transmitter are obviously improved.

Drawings

FIG. 1 is a schematic diagram of a pressure transmitter;

FIG. 2 is a cross-sectional view of the pressure transmitter;

FIG. 3 is a cross-sectional view of the gauge head;

FIG. 4 is a cross-sectional view of the first end cap;

fig. 5 is an exploded view of the shield.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.

As shown in fig. 1 and 2, a pressure transmitter includes a pressure sensor assembly 3, a detection bobbin 2 and a gauge head 1, which are sequentially connected from bottom to top, wherein the pressure sensor assembly 3 includes a pressure sensor 3a and templates 3b symmetrically arranged at two ends of the pressure sensor 3a, an adjustment circuit chamber 1a and a control circuit chamber 1b are arranged at the left and right ends of the gauge head 1, both ends of which are open, an adjustment circuit is arranged in the adjustment circuit chamber 1a, a control circuit is arranged in the control circuit chamber 1b, and after the pressure or hydraulic pressure sensed by the pressure sensor assembly 3 is fed back to the adjustment circuit chamber 1a and the control circuit chamber 1b through the detection bobbin 2, the pressure or hydraulic pressure can be converted into an electrical signal and transmitted to corresponding acquisition equipment, thereby realizing pressure measurement. The specific pressure measuring principle of the pressure transmitter is the existing mature technology, and further description is omitted here.

As shown in fig. 1 to 3, the meter head 1 is respectively provided with a first end cap 4 and a second end cap 5 at the positions corresponding to the openings of the adjusting circuit chamber 1a and the control circuit chamber 1b, the openings of the adjusting circuit chamber 1a and the control circuit chamber 1b are both provided with annular sinking grooves 1c, the first end cap 4 and the second end cap 5 are welded on the corresponding annular sinking grooves 1c, and the first end cap 4, the second end cap 5 and the meter head 1 are assembled by adopting a welding process, so that the structural strength and the sealing performance of the conventional meter head can be improved.

Because the inside of the first end cap 4 is sealed by the adjusting circuit, the outer end of the adjusting circuit chamber 1a must have an openable adjusting window, and in the prior art, the whole first end cap 4 is detachably assembled on the opening of the adjusting circuit chamber 1a, which can result in the reduction of the product strength. Therefore, this embodiment is with first end cover 4 integrative welding at gauge outfit 1 lateral part, then offers regulation hole 4a in first end cover 4 middle part to give regulation hole 4a configuration demountable installation's blanking cover 8, so design, both guaranteed the bulk strength, realized the circuit is adjustable again.

Further, as shown in fig. 2 and 4, for the convenience of installing the blocking cover 8, the outer end of the adjusting hole 4a is sequentially provided with a first step groove a and a second step groove b from inside to outside, the aperture of the adjusting hole 4a, the aperture of the first step groove a and the aperture of the second step groove b are gradually increased, the blocking cover 8 is composed of a cover disc 8a and a plug 8b which are integrally formed, the plug 8b is convexly formed on the inner side of the cover disc 8a, when the product is assembled, the plug 8b extends into the first step groove a, and the cover disc 8a is locked on the outer side of the first end cover 4 through four groups of bolts 7. In order to ensure the meter head to be sealed, a sealing ring 9 is sleeved at one end, close to the cover disc 8a, of the plug 8b, and the sealing ring 9 is installed in the second stepped groove b.

As shown in fig. 2 and 5, the outside of the pressure sensor assembly 3 is wrapped by a protective cover 6, a vibration-proof material is filled between the inner side wall of the protective cover 6 and the pressure sensor assembly 3, the vibration-proof material is preferably made of silica gel in the implementation, after the pressure transmitter is installed on a device to be tested, the pressure sensor assembly 3 is wrapped in the protective cover 6 by the silica gel, the vibration-proof performance and the protection level of the transmitter can be obviously improved, and the pressure transmitter has a promotion effect on ensuring the air tightness of air inlet, the measurement accuracy of the transmitter and the safety of working equipment.

In this implementation, the protection casing 6 is constructed into the rectangle structure, and for easy to assemble, the protection casing 6 is formed by first housing 6a and the lock of second housing 6b, and in order to dodge and detect bobbin 2, the one end that first housing 6a and second housing 6b upper portion are close to each other all is equipped with dodges breach 61, dodges the inner of breach 61 and is the half slot structure, first housing 6a and the back of being in the same place of second housing 6b lock, and two half slots just in time enclose the minimum external diameter department that detects bobbin 2. For convenient fixing, the template 3b is a rectangular block structure, and the first housing 6a and the second housing 6b are both fixed on the template 3b through a threaded connector c, which can be a screw, a bolt, and the like.

Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims (7)

1. The utility model provides a pressure transmitter with high protection level, includes gauge outfit (1), detection bobbin (2) and pressure sensor subassembly (3) that from top to bottom connects gradually, be equipped with equal open adjusting circuit cavity (1a) of outer end and control circuit cavity (1b) on gauge outfit (1), the open end of adjusting circuit cavity (1a) and control circuit cavity (1b) disposes first end cover (4) and second end cover (5), its characterized in that respectively: first end cover (4) and second end cover (5) all with gauge outfit (1) welded assembly, the outside parcel of pressure sensor subassembly (3) has protection casing (6), and it has silica gel to fill between the inboard lateral wall of this protection casing (6) and pressure sensor subassembly (3).

2. The pressure transmitter with high level of protection of claim 1, wherein: the outer ends of the adjusting circuit chamber (1a) and the control circuit chamber (1b) are provided with annular sinking grooves (1c), and the first end cover (4) and the second end cover (5) are welded on the corresponding annular sinking grooves (1 c).

3. The pressure transmitter with high level of protection of claim 1, wherein: first end cover (4) middle part is equipped with regulation hole (4a) to it has blanking cover (8) to attach through bolt (7) lock, regulation hole (4a) outer end is formed with first step groove (a) and second step groove (b), blanking cover (8) are including hugging closely lid dish (8a) in first end cover (4) outside, and stretch into end cap (8b) of first step groove (a), the pot head that end cap (8b) are close to lid dish (8a) is equipped with sealing washer (9), and this sealing washer (9) are located in second step groove (b).

4. The pressure transmitter with high level of protection of claim 1, wherein: the protective cover (6) comprises a first cover shell (6a) and a second cover shell (6b) which are just opposite to each other and buckled, wherein an avoiding notch (61) is formed in one end, close to each other, of the upper portions of the first cover shell (6a) and the second cover shell (6b), and the inner end of the avoiding notch (61) is formed into a semicircular groove matched with the outer diameter of the detection bobbin (2).

5. The pressure transmitter with high level of protection of claim 4, wherein: the first and second housings (6a, 6b) are each of rectangular configuration.

6. The pressure transmitter with high level of protection of claim 4, wherein: the pressure sensor assembly (3) comprises a pressure sensor (3a) and templates (3b) symmetrically arranged at two ends of the pressure sensor (3a), and the first housing (6a) and the second housing (6b) are fixed on the templates (3b) through threaded connecting pieces (c).

7. The pressure transmitter with high level of protection of claim 6, wherein: the template (3b) is of a rectangular block structure.

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