CN2160114Y

CN2160114Y - Pressure taking device for medium containing dust

Info

Publication number: CN2160114Y
Application number: CN 93219924
Authority: CN
Inventors: 宣叙
Original assignee: SHIJIAZHUANG IRON AND STEEL WORKS
Current assignee: SHIJIAZHUANG IRON AND STEEL WORKS
Priority date: 1993-07-29
Filing date: 1993-07-29
Publication date: 1994-03-30
Anticipated expiration: 2003-07-29

Abstract

The utility model relates to a pressure signal taking device for a pressure detecting instrument, particularly a pressure taking device for medium containing dust. The utility model comprises a front leading pipe (2), a back leading pipe (3), a pressure taking pipe (5) and a sealing washer (6), characterized in that the front side of the pressure taking pipe (5) is also provided with a sleeve pipe (4) and a filter (1); the end of the filter (1) is connected with the front leading pipe and the back leading pipe via the sealing washer (6); the outside of the filter (1) is provided with the sleeve pipe (4) which is communicated with the pressure taking pipe (5); the medium containing dust is entered into the sleeve pipe (4), is led to the pressure taking pipe (5) and is delivered to a pressure instrument after the medium containing dust is filtered by the filter (1). The filter (1) is a metal filter for the production of powder metallurgical technique. The utility model solves the problem of clogging of the pressure taking device for medium containing dust, being widely applicable for the pressure taking of the medium containing dust in thick and thin pipelines, big and small containers. The utility model with simple structure can not be clogged after a long time work, and can be used under the environment of high temperature and pressure without influencing the precision of pressure measurement.

Description

Pressure taking device for medium containing dust

The utility model relates to a kind of pressure signal withdrawing device of pressure detection instrument, particularly a kind of medium containing dust pressure obtaning device.

At present, in pressure measurement technology, for pure medium, as water purification, net air, oxygen, steam etc., its pressure is all no problem, and for medium containing dust, as the pressure survey of blast furnace raw gas, sewage etc. often because of pressure obtaning device stops up can not be successful.In order to overcome the difficulty of medium containing dust pressure, once designed two big class pressure obtaning devices, wherein a class is to adopt the pressure obtaning device of enlarged tube depositing dust principle design, and it strengthens the diameter of pressure pipe, makes dust be difficult for gathering, increase reducing enlarged tube structure again on top, play further dedusting, this mode is more quite a lot of than direct pressure effect, but long slightly taking over and the valve place still can produce obstruction of time, design an articulation and pipe cap therein, artificial penetrating usefulness when stopping up as processing.The pressure obtaning device that has steam or compressed air purge system is arranged again on this basis, this apparatus structure complexity, peripherals is many, and pipeline needs insulation, and result of use is also also unsatisfactory.Another kind of pressure obtaning device is to adopt rubber or plastic diaphragms that medium containing dust and measuring system are kept apart, generally to be full of oil or other liquid in the measurement side, the shortcoming of this pressure obtaning device is to use the medium temperature can not be too high, generally require less than 40 ℃, in addition, rubber or plastics are aging easily, thereby produce some influences to measuring, and pressure pipe and still easily obstruction of valve.Therefore, though existing medium containing dust pressure obtaning device can be in short-term or local some problems that solve, because of structure numerous and diverse, peripherals is many, limited by serviceability temperature, influences measuring accuracy, parts are easily aging, and the valve part is easy problem such as obstruction still, and result of use is very undesirable.

The purpose of this utility model is defective and the deficiency at existing medium containing dust pressure obtaning device, design and a kind ofly that extensively be suitable for, simple in structure can not stop up for a long time again, not influenced by external condition and do not influence the medium containing dust pressure obtaning device of measuring accuracy, thereby solve the difficult problem of medium containing dust pressure taking-up in the industrial automation technology.

The utility model has adopted diverse design, is not depositing dust or isolation for the processing of dust-laden in the medium, but filters, and just filters before the medium pressure.This design realizes by following pressure obtaning device, this pressure obtaning device that is used to detect medium containing dust pressure comprises preceding skirt (2), back skirt (3), pressure pipe (5) and packing washer (6), the front that it is characterized in that pressure pipe (5) also has sleeve pipe (4) and filtrator (1), the end of filtrator (1) is by packing washer (6) and preceding skirt (2), back skirt (3) links to each other, there is sleeve pipe (4) outside of filtrator (1), sleeve pipe (4) communicates with pressure pipe (5), medium containing dust enters sleeve pipe (4) after filtering through filter (1), leads to pressure pipe (5).The metallic filter that filtrator (1) powder metallurgical technique is produced, its pore size can not be by being as the criterion with the smallest particles of medium containing dust.It goes for the working environment of any High Temperature High Pressure.Owing to before the medium pressure, filter, rather than after the pressure valve, take means to handle again, so just make the pressure pipe not have latch up phenomenon afterwards and take place.Separate with metallic filter between medium containing dust and pressure pipe (5), the smallest particles of dust-laden can not pass through filtrator (1), and pressure medium then can reach manometer by filtrator, pressure pipeline.

The utility model has solved the pressure obtaning device blocking problem of medium containing dust, can be widely used in the pressure that thick, tubule road and big small container include medium, simple in structure, long-time use can not stopped up, adapting to the environmental baseline of various High Temperature High Pressure and do not influence pressure measurement accuracy, is a kind of fabulous medium containing dust pressure obtaning device.

Accompanying drawing 1 is the medium containing dust pressure obtaning device that is used for small diameter pipeline;

Accompanying drawing 2 is the medium containing dust pressure obtaning devices that are used for large-diameter pipeline or pressure vessel;

Accompanying drawing 3 is the medium containing dust pressure obtaning devices that are used for the large volume pressure vessel.

1 is filtrator among the figure, the 2nd, and preceding skirt, the 3rd, back skirt, the 4th, sleeve pipe, the 5th, pressure pipe, the 6th, packing washer.

Introduce several embodiment below in conjunction with accompanying drawing.

Embodiment 1:

The medium containing dust pressure obtaning device that is used for small diameter pipeline as shown in Figure 1, medium containing dust skirt (2) in the past enters filtrator (1), arrive back skirt (3) again, metallic filter (1) is made ducted a bit of, link to each other with preceding skirt (2), back skirt (3) by packing washer (6), there is sleeve pipe (4) outside of filtrator (1), it links to each other by internal thread with forward and backward skirt, one side of sleeve pipe (4) communicates with pressure pipe (5), medium containing dust enters sleeve pipe (4) after filtering through filter (1), lead to pressure pipe (5), reach manometer.

Embodiment 2:

The medium containing dust pressure obtaning device that is used for large-diameter pipeline or pressure vessel as shown in Figure 2, it is contained on duct wall or the chamber wall, enters sleeve pipe (4) after the filtration of medium containing dust by metallic filter (1), leads to pressure pipe (5), reaches manometer.Sleeve pipe (4) links to each other with the skirt (2) (3) of large-diameter pipeline wall by its external thread, and at this moment, forward and backward skirt becomes one, and its inside has screw thread to link to each other with sleeve pipe (4), compresses the packing washer (6) of filter edges simultaneously.

Embodiment 3:

The medium containing dust pressure obtaning device that is used for the large volume pressure vessel as shown in Figure 3, can make the pressure vessel that a metallic filter constitutes, shape can be cylindric, cube or other shapes, medium containing dust is by after the filtration of metallic filter (1), directly enter pressure pipe (5), sleeve pipe (4) has become ring flange, can be fixed on this pressure obtaning device on the container outer wall or the outside shelf of container on.

Claims

1, a kind of medium containing dust pressure obtaning device, it comprises preceding skirt (2), back skirt (3), pressure pipe (5) and packing washer (6), it is characterized in that also having sleeve pipe (4) and filtrator (1) in the front of pressure pipe (5), the end of filtrator (1) links to each other with preceding skirt (2), back skirt (3) by packing washer (6), there is sleeve pipe (4) outside of filtrator (1), sleeve pipe (4) communicates with pressure pipe (5), medium containing dust enters sleeve pipe (4) after filtering through filter (1), leads to pressure pipe (5).

2, device according to claim 1 is characterized in that the metallic filter that described filtrator (1) is produced for powder metallurgical technique, and its pore size can not be by being as the criterion with the smallest particles of medium containing dust.