阅读说明：本技术 一种水下差压变送器 (Underwater differential pressure transmitter ) 是由 李世英 王镇岗 文鹏荣 李广福 于 2020-11-04 设计创作，主要内容包括：本发明公开了一种水下差压变送器,包括座体,座体内贯穿有轴向通道,该轴向通道包括位于中部的传感器段,传感器段的两端分别设有卡套段,卡套段的直径大于所述传感器段的直径,卡套段的内端与所述传感器段接通,卡套段的外端伸出所述座体,卡套段内分别填塞有堵头,在堵头上贯穿有轴向取压孔,轴向取压孔的内端与所述传感器段接通,轴向取压孔的外端伸出堵头；在座体上还设有两个端面取压孔,两个端面取压孔分别与两个卡套段一一对应,端面取压孔的内端与对应的卡套段接通,端面取压孔的外端伸出座体。采用本发明的一种水下差压变送器,具有密封性好的优点,特别适用于深水环境下的压差测量,可以根据不同的使用环境选择取压方向,适用性强。(The invention discloses an underwater differential pressure transmitter, which comprises a base body, wherein an axial channel penetrates through the base body, the axial channel comprises a sensor section positioned in the middle, two ends of the sensor section are respectively provided with a clamping sleeve section, the diameter of the clamping sleeve section is larger than that of the sensor section, the inner end of the clamping sleeve section is communicated with the sensor section, the outer end of the clamping sleeve section extends out of the base body, plugs are respectively filled in the clamping sleeve sections, an axial pressure tapping hole penetrates through the plugs, the inner end of the axial pressure tapping hole is communicated with the sensor section, and the outer end of the axial pressure tapping hole extends out of the plugs; the base body is also provided with two end face pressure taking holes which are respectively in one-to-one correspondence with the two clamping sleeve sections, the inner ends of the end face pressure taking holes are communicated with the corresponding clamping sleeve sections, and the outer ends of the end face pressure taking holes extend out of the base body. The underwater differential pressure transmitter has the advantage of good sealing performance, is particularly suitable for differential pressure measurement in deep water environment, can select the pressure taking direction according to different use environments, and has strong applicability.)

1. An underwater differential pressure transmitter, characterized by: the sensor comprises a base body (1), wherein an axial channel penetrates through the base body (1), the axial channel comprises a sensor section (1a) positioned in the middle, two ends of the sensor section (1a) are respectively provided with a clamping sleeve section (1b), the diameter of the clamping sleeve section (1b) is larger than that of the sensor section (1a), the inner end of the clamping sleeve section (1b) is communicated with the sensor section (1a), and the outer end of the clamping sleeve section (1b) extends out of the base body (1);

plugs (3) are respectively filled in the clamping sleeve sections (1b), axial pressure measuring holes (1c) penetrate through the plugs (3), the inner ends of the axial pressure measuring holes (1c) are communicated with the sensor sections (1a), and the outer ends of the axial pressure measuring holes (1c) extend out of the plugs (3);

the seat body (1) is also provided with two end face pressure taking holes (1d), the two end face pressure taking holes (1d) are respectively in one-to-one correspondence with the two clamping sleeve sections (1b), the inner ends of the end face pressure taking holes (1d) are communicated with the corresponding clamping sleeve sections (1b), and the outer ends of the end face pressure taking holes (1d) extend out of the seat body (1);

a sensor core body (2) is arranged in the sensor section (1a), the sensor core body (2) and the inner wall of the sensor section (1a) are sealed, the sensor core body (2) is provided with two pressure sensing ends, the two pressure sensing ends face to the two ends of the sensor section (1a), and the inner ends of the axial pressure taking hole (1c) and the end face pressure taking hole (1d) are led to the corresponding pressure sensing ends of the sensor core body (2);

the base body (1) is also provided with an electronic module mounting hole (1e), the outer end of the electronic module mounting hole (1e) extends out of the base body (1), the bottom of the electronic module mounting hole (1e) is provided with a lead hole (1f), and the inner end of the lead hole (1f) is communicated with the middle part of the sensor section (1 a);

an electronic cabin (4) is installed in the electronic module installation hole (1e), and an output wiring harness of the sensor core body (2) is connected into the electronic cabin (4) through the lead hole (1 f);

the areas at the two ends of the sensor segment (1a) form two pressure leading areas, and the axial pressure taking hole (1c) or the end surface pressure taking hole (1d) in the same pressure leading area is blocked.

2. The subsea differential pressure transmitter of claim 1, wherein: the hole center lines of the two end surface pressure taking holes (1d) are parallel, the two end surface pressure taking holes (1d) extend out of the same end surface of the seat body (1), and the inner ends of the end surface pressure taking holes (1d) are close to the inner end of the clamping sleeve section (1 b).

3. The subsea differential pressure transmitter of claim 1 or 2, wherein: the clamping sleeve section (1b) comprises an inner clamping sleeve section connected with the sensor section (1a), the outer end of the inner clamping sleeve section is connected with an outer clamping sleeve section, the diameter of the outer clamping sleeve section is larger than that of the inner clamping sleeve section, the outer clamping sleeve section and the inner clamping sleeve section are arranged in a concentric line, the inner end of the inner clamping sleeve section gradually retracts until the inner clamping sleeve section is communicated with the sensor section (1a), and the outer end of the outer clamping sleeve section gradually expands until the outer clamping sleeve section is communicated with the outside of the seat body (1);

the outer end face of the plug (3) is parallel and level with the outer wall of the base body (1), the outer end of the plug (3) is welded with the base body (1), and an annular welding seam between the plug (3) and the base body (1) is located at the outer end of the external clamping sleeve section.

4. The subsea differential pressure transmitter of claim 1 or 2, wherein: one end of the electronic bin (4) is inserted into the electronic module mounting hole (1e), and the outer wall of the electronic bin (4) is welded with the outer wall of the seat body (1) which surrounds the electronic module mounting hole (1e) by a circle.

5. The subsea differential pressure transmitter of claim 1 or 2, wherein: the sensor comprises a sensor core body (2), and is characterized in that the outer wall of the sensor core body (2) is provided with at least one annular sealing groove, sealing rings (21) are respectively arranged in the annular sealing grooves, and the sealing rings (21) are tightly abutted to the inner wall of a sensor section (1 a).

6. The subsea differential pressure transmitter of claim 1 or 2, wherein: the two end face pressure taking holes (1d) are plugged, and the two axial pressure taking holes (1c) are respectively used for leading pressure to the two pressure sensing ends of the sensor core body (2).

7. The subsea differential pressure transmitter of claim 1 or 2, wherein: the two axial pressure taking holes (1c) are plugged, and the two end face pressure taking holes (1d) are respectively used for leading pressure to the two pressure sensing ends of the sensor core body (2).

8. The subsea differential pressure transmitter of claim 1 or 2, wherein: the axial pressure tapping hole (1c) in one pressure tapping area is blocked, and the corresponding end surface pressure tapping hole (1d) is used for leading pressure to one pressure sensing end of the sensor core body (2);

the end face pressure taking hole (1d) in the other pressure taking area is blocked, and the corresponding axial pressure taking hole (1c) is used for leading pressure to the other pressure sensing end of the sensor core body (2).

Technical Field

The invention relates to an instrument for oil extraction, in particular to an underwater differential pressure transmitter suitable for a deepwater environment.

Background

The instrument and the control system are one of the key links in the offshore oil and gas field development engineering, and are the brains and safety guards of various development facilities of the offshore oil and gas field. The instrument control system continuously monitors and controls normal operation of various production and public equipment of the offshore oil and gas field on the one hand, and monitors various accidents in real time on the other hand, and once an accident occurs, alarming is carried out at the first time and the system is subjected to logical automatic processing control so as to control unsafe factors in a minimum range, thereby ensuring production safety of the offshore oil and gas field and ensuring safety of personnel and facilities. At present, the development of international offshore oil and gas fields is far higher than that of developed technologies in China, equipment manufacturing technologies are mature, the mining water depth of oil and gas fields in China such as Norway and Brazil can reach 2000m generally, and under the great trend, in order to meet the development requirements of China for deep-sea oil and gas fields, research, design and manufacturing of underwater production equipment are urgent. The differential pressure/temperature pressure transmitter is used as an important instrument in deep water production and is a basic instrument of equipment in ocean development. The operation production personnel can know the underwater production condition in time and adjust the production measures in time according to the differential pressure signal transmitted to the upper control system underwater. However, core instruments such as an underwater differential pressure transmitter and a temperature and pressure transmitter which are used underwater at present are basically controlled by foreign manufacturers, so that the design, development and development costs of domestic related derivative products are high, the period is long, and the like. Seriously restricting the development of China in related fields, and the localization of the used underwater instruments is urgent.

Disclosure of Invention

The invention provides an underwater differential pressure transmitter which is suitable for a deepwater environment and has the advantages of strong sealing performance and wide application range.

The technical scheme is as follows:

the utility model provides an underwater differential pressure transmitter which the key lies in: the device comprises a seat body, wherein an axial channel penetrates through the seat body, the axial channel comprises a sensor section positioned in the middle, two ends of the sensor section are respectively provided with a clamping sleeve section, the diameter of the clamping sleeve section is larger than that of the sensor section, the inner end of the clamping sleeve section is communicated with the sensor section, and the outer end of the clamping sleeve section extends out of the seat body;

plugs are respectively filled in the clamping sleeve sections, axial pressure measuring holes penetrate through the plugs, the inner ends of the axial pressure measuring holes are communicated with the sensor sections, and the outer ends of the axial pressure measuring holes extend out of the plugs;

the seat body is also provided with two end face pressure taking holes, the two end face pressure taking holes are respectively in one-to-one correspondence with the two clamping sleeve sections, the inner ends of the end face pressure taking holes are communicated with the corresponding clamping sleeve sections, and the outer ends of the end face pressure taking holes extend out of the seat body;

a sensor core body is arranged in the sensor section, the sensor core body and the inner wall of the sensor section are sealed, the sensor core body is provided with two pressure sensing ends, the two pressure sensing ends face to the two ends of the sensor section respectively, and the inner ends of the axial pressure taking hole and the end surface pressure taking hole are led to the pressure sensing ends corresponding to the sensor core body;

the base body is also provided with an electronic module mounting hole, the outer end of the electronic module mounting hole extends out of the base body, the hole bottom of the electronic module mounting hole is provided with a lead hole, and the inner end of the lead hole is communicated with the middle part of the sensor section;

an electronic bin is installed in the electronic module installation hole, and an output wire harness of the sensor core body is connected into the electronic bin through the lead hole;

the areas at the two ends of the sensor section form two pressure leading areas, and the axial pressure taking hole or the end surface pressure taking hole in the same pressure leading area is blocked.

Has the advantages that: the underwater differential pressure transmitter has good sealing performance, is particularly suitable for measuring the differential pressure in a deep water environment, can select the pressure taking direction according to different use environments, and has strong applicability.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic cross-sectional view of the seat body 1;

fig. 3 is a schematic cross-sectional structure of the present invention.

Detailed Description

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

An underwater differential pressure transmitter is shown in fig. 1 to 3, and includes a base body 1, an axial channel penetrates through the base body 1, the axial channel includes a sensor section 1a located in the middle, two ends of the sensor section 1a are respectively provided with a clamping sleeve section 1b, the diameter of the clamping sleeve section 1b is larger than that of the sensor section 1a, the inner end of the clamping sleeve section 1b is communicated with the sensor section 1a, and the outer end of the clamping sleeve section 1b extends out of the base body 1;

plugs 3 are respectively filled in the clamping sleeve sections 1b, axial pressure measuring holes 1c penetrate through the plugs 3, the inner ends of the axial pressure measuring holes 1c are communicated with the sensor sections 1a, and the outer ends of the axial pressure measuring holes 1c extend out of the plugs 3;

the clamping sleeve section 1b comprises an inner clamping sleeve section connected with the sensor section 1a, the outer end of the inner clamping sleeve section is connected with an outer clamping sleeve section, the diameter of the outer clamping sleeve section is larger than that of the inner clamping sleeve section, the outer clamping sleeve section and the inner clamping sleeve section are concentrically arranged, the inner end of the inner clamping sleeve section gradually shrinks inwards until the inner clamping sleeve section is communicated with the sensor section 1a, and the outer end of the outer clamping sleeve section gradually expands outwards until the outer clamping sleeve section is communicated with the outside of the seat body 1;

the outer end face of the plug 3 is parallel and level with the outer wall of the seat body 1, the outer end of the plug 3 is welded with the seat body 1, and an annular welding line between the plug 3 and the seat body 1 is located at the outer end of the external clamping sleeve section.

The seat body 1 is also provided with two end surface pressure taking holes 1d, the hole center lines of the two end surface pressure taking holes 1d are parallel, the outer ends of the end surface pressure taking holes 1d extend out of the seat body 1, the two end surface pressure taking holes 1d extend out from the same end surface of the seat body 1, the two end surface pressure taking holes 1d are respectively in one-to-one correspondence with the two jacket sections 1b, the inner ends of the end surface pressure taking holes 1d are communicated with the corresponding jacket sections 1b, and the inner ends of the end surface pressure taking holes 1d are close to the inner ends of the jacket sections 1 b;

a sensor core body 2 is arranged in the sensor section 1a, the sensor core body 2 is sealed with the inner wall of the sensor section 1a, the sensor core body 2 is provided with two pressure sensing ends, the two pressure sensing ends respectively face the two ends of the sensor section 1a, and the inner ends of the axial pressure taking hole 1c and the end surface pressure taking hole 1d are led to the pressure sensing ends corresponding to the sensor core body 2; the outer wall of the sensor core body 2 is provided with at least one annular sealing groove, sealing rings 21 are respectively arranged in the annular sealing grooves, and the sealing rings 21 are tightly abutted to the inner wall of the sensor section 1 a;

the base body 1 is also provided with an electronic module mounting hole 1e, the outer end of the electronic module mounting hole 1e extends out of the base body 1, the hole bottom of the electronic module mounting hole 1e is provided with a lead hole 1f, and the inner end of the lead hole 1f is communicated with the middle part of the sensor segment 1 a;

an electronic cabin 4 is installed in the electronic module installation hole 1e, and an output wire harness of the sensor core body 2 is connected to the electronic cabin 4 through the lead hole 1 f; one end of the electronic bin 4 is inserted into the electronic module mounting hole 1e, and the outer wall of the electronic bin 4 is welded with the outer wall of the seat body 1 which surrounds the electronic module mounting hole 1e by a circle.

The electronic bin 4 comprises a bin body, a cavity is arranged in the bin body, a control chip and an output connector are arranged in the cavity, an output wire harness of the sensor core body 2 is connected to the input end of the control chip, the output end of the control chip is connected to the output connector, and the output connector extends out of the cavity.

When the pressure sensor is used, two pressure leading areas are formed in the areas at the two ends of the sensor segment 1a, and the axial pressure taking hole 1c or the end surface pressure taking hole 1d in the same pressure leading area is blocked;

specifically, the method comprises the following steps:

in a first specific embodiment, two end face pressure taking holes 1d are blocked, and two axial pressure taking holes 1c are respectively used for leading pressure to two pressure sensing ends of the sensor core body (2).

In a second specific embodiment, two axial pressure taking holes 1c are blocked, and two end surface pressure taking holes 1d are respectively used for leading pressure to two pressure sensing ends of the sensor core body (2).

In a third specific embodiment, the axial pressure tapping hole 1c in one pressure tapping area is blocked, and the corresponding end surface pressure tapping hole 1d is used for tapping one pressure sensing end of the sensor core body (2); the end face pressure taking hole 1d in the other pressure taking area is blocked, and the corresponding axial pressure taking hole 1c is used for leading pressure to the other pressure sensing end of the sensor core body (2).

In the above three pressure guiding manners, a pressure guiding pipe may be inserted into the end surface pressure measuring hole 1d or/and the axial pressure measuring hole 1c for guiding pressure, or an end surface flange may be connected to an orifice position for guiding pressure in a manner of connecting the pressure guiding pipe, and the related sealing problems are well known to those skilled in the art and are not described herein.

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.