CN215448328U

CN215448328U - Leakage detection device in cold box

Info

Publication number: CN215448328U
Application number: CN202121949149.6U
Authority: CN
Inventors: 谢丽桃
Original assignee: Xie Litao
Current assignee: Xie Litao
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2022-01-07
Anticipated expiration: 2031-08-18

Abstract

The utility model discloses a device for detecting leakage in a cold box, which relates to the technical field of cold box equipment and comprises a main shell, wherein an oxygen detector is arranged at the center of the top of the main shell, and the bottom end of the oxygen detector extends into the main shell. According to the utility model, the gas flow cavity is formed between the interior of the main body shell and the breather valve body, so that when the leaked gas in the cold box jacks the valve plate, the leaked gas enters the inner side of the shell, and escapes to the gas flow cavity in an annular manner through the bottom of the shell, so that the leaked gas is filled in the inner space of the gas flow cavity, enters the multiple groups of gas inlet pipes and the central pipe in the gas flow cavity and is detected by the oxygen detector, the existing breather valve with annular exhaust has a good gas capturing effect, so that the leaked gas is filled in the gas flow cavity, the leakage condition is timely detected by the oxygen detector, and the effect of detecting the leaked gas in real time is greatly improved.

Description

Leakage detection device in cold box

Technical Field

The utility model relates to the technical field of cold box equipment, in particular to a device for detecting leakage in a cold box.

Background

The cold box is a group of low-temperature heat exchange equipment with high efficiency, heat insulation and cold insulation, is frequently adopted in the cryogenic separation process, for example, the cold box which works at about-100 to-140 ℃ is adopted in the cryogenic separation process of petroleum cracking gas, and consists of a high-efficiency plate heat exchanger with a compact structure and a gas-liquid separator, and because the low temperature is easy to dissipate cold and extremely strict heat insulation and cold insulation are required, the heat exchanger and the separator are packaged in a box-shaped object by using heat insulation materials, so the cold box is called as the cold box.

To the inside gas leakage detection of cold box among the prior art, pass through pipe connection oxygen detector at cold box top breather valve gas vent usually, and then detect the inside gas leakage condition of cold box, but most breather valves are all annular structure at carminative gas vent often, and prior art passes through pipe connection oxygen detector then can not in time detect the gas leakage condition, leads to real-time gas detection's effect relatively poor.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims to provide a device for detecting leakage in a cold box, so as to solve the technical problems that the gas leakage condition cannot be better detected in real time and the gas leakage cannot be better detected in time in the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme: a device for detecting leakage in a cold box comprises a main body shell, wherein an oxygen detector is arranged at the center of the top of the main body shell, and the bottom end of the oxygen detector extends into the main body shell;

the bottom end of the inner side of the main body shell is connected with a breather valve body, a gas flow cavity is formed between the main body shell and the breather valve body, a shell positioned in the gas flow cavity is arranged on the outer side of the breather valve body, and a valve plate is movably arranged in the breather valve body;

the oxygen detector bottom just is located the position department of gas flow intracavity portion and is provided with the center tube, the center tube outside evenly is provided with the multiunit intake pipe, the main part shell outside evenly is provided with multiunit and intake pipe looks dislocation and extends to the check valve in the main part shell outside.

By adopting the technical scheme, the outer side of the shell is provided with the main body shell connected with the outer surface of the breather valve body, a gas flow cavity is formed between the inner part of the main body shell and the breather valve body, when the leaked gas in the cold box pushes the valve plate open, the leaked gas enters the inner side of the shell and then escapes to the gas flow cavity in an annular manner through the bottom of the shell, so that the leaked gas is filled in the inner space of the gas flow cavity, enters the plurality of groups of gas inlet pipes and the central pipe in the center in the gas flow cavity and is detected by the oxygen detector, has good function of capturing gas for the existing annular exhaust breather valve, leads the gas flowing cavity to be filled with the leakage gas, and then the leakage condition is detected by the oxygen detector in time, and the effect of real-time detection of the leaked gas is greatly improved.

The utility model is further arranged in such a way that a plurality of groups of air inlets are uniformly arranged at the bottoms of the plurality of groups of air inlet pipes and are communicated with the air flowing cavity.

By adopting the technical scheme, the gas convenient to leak is detected by the oxygen detector 2, and the efficiency of detecting the leaked gas in real time is improved.

The valve plate is characterized in that a valve rod is fixedly arranged at the center of the top of the valve plate, and a support frame movably connected with the valve rod is fixedly arranged at the top end of the inner side of the shell.

Through adopting above-mentioned technical scheme, the valve rod plays the limiting displacement when going up and down to the valve plate, makes the valve plate more stable at the in-process that goes up and down, can not take place the phenomenon of skew.

The valve plate is characterized in that a spring is fixedly connected between the outer side of the valve rod and the support frame at the top of the valve plate, and a sliding cavity matched with the valve rod is arranged at the center of the top of the shell.

Through adopting above-mentioned technical scheme, when there is not the bottom extrusion valve plate of gas leakage from the valve plate, the elasticity of spring makes the valve plate compress tightly on breather valve body inboard boss, has improved the seal.

The utility model is further arranged in that four corners of the bottom end of the outer side of the breather valve body are fixedly provided with connecting rods fixedly connected with the shell, and the connecting rods are fixedly connected with the edge position of the bottom of the shell through screws.

Through adopting above-mentioned technical scheme, play the fixed connection effect to the shell, through the screw connection, make convenient to detach between the relative breather valve body of shell.

The utility model is further provided with four groups of connecting rods, and grooves are formed in the tail ends of the connecting rods.

Through adopting above-mentioned technical scheme, the recess is better fixes spacing support to the shell bottom, makes the shell whole more stable.

In summary, the utility model mainly has the following beneficial effects: according to the utility model, the main body shell connected with the outer surface of the breather valve body is arranged on the outer side of the shell, the gas flow cavity is formed between the inner part of the main body shell and the breather valve body, when the leaked gas in the cold box jacks the valve plate, the leaked gas enters the inner side of the shell, and then the leaked gas escapes to the gas flow cavity in an annular manner through the bottom of the shell, so that the leaked gas is filled in the inner space of the gas flow cavity, enters the multiple groups of gas inlet pipes and the central pipe in the gas flow cavity and is detected by the oxygen detector.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic structural view of the present invention as a whole;

FIG. 4 is an enlarged view taken at A of FIG. 2 according to the present invention;

FIG. 5 is an enlarged view of the utility model at B of FIG. 3.

In the figure: 1. a main body case; 2. an oxygen detector; 3. a central tube; 4. an air inlet pipe; 5. an air inlet; 6. a one-way valve; 7. a breather valve body; 8. a gas flow chamber; 9. a valve plate; 10. a support frame; 11. a valve stem; 12. a spring; 13. a connecting rod; 14. a housing.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

The following describes an embodiment of the present invention based on its overall structure.

A device for detecting leakage in a cold box is disclosed, as shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, comprising a main body shell 1, an oxygen detector 2 is arranged at the center of the top of the main body shell 1, and the bottom end of the oxygen detector 2 extends to the inside of the main body shell 1;

the bottom end of the inner side of the main body shell 1 is connected with a breather valve body 7, a gas flow cavity 8 is formed between the main body shell 1 and the breather valve body 7, a shell 14 positioned in the gas flow cavity 8 is arranged on the outer side of the breather valve body 7, and a valve plate 9 is movably arranged in the breather valve body 7;

a central tube 3 is arranged at the bottom of the oxygen detector 2 and at the position inside the gas flow cavity 8, a plurality of groups of gas inlet tubes 4 are uniformly arranged outside the central tube 3, a plurality of groups of gas inlet holes 5 are uniformly arranged at the bottoms of the plurality of groups of gas inlet tubes 4, and the air inlet 5 is communicated with the air flowing cavity 8, a plurality of groups of one-way valves 6 which are staggered with the air inlet pipe 4 and extend to the outer side of the main body shell 1 are uniformly arranged on the outer side of the main body shell 1, a main body shell 1 connected with the outer surface of the breather valve body 7 is arranged at the outer side of the outer shell 14, a gas flow cavity 8 is formed between the inner part of the main body shell 1 and the breather valve body 7, when the valve plate 9 is pushed open by the leaked gas in the cold box, the leaked gas enters the inner side of the shell 14, the leaking gas then escapes annularly through the bottom of the housing 14 into the gas flow chamber 8, so that the internal space of the gas flow chamber 8 is filled with the leaking gas.

Referring to fig. 1 and 2, a valve rod 11 is fixedly arranged at the center of the top of the valve plate 9, a support frame 10 movably supported and connected with the valve rod 11 is fixedly arranged at the top end of the inner side of the shell 14, a spring 12 is fixedly connected between the outer side of the valve rod 11 and the support frame 10 at the top of the valve plate 9, and a sliding cavity matched with the valve rod 11 is arranged at the center of the top of the shell 14.

Referring to fig. 1 and 2, the four corners of the bottom end of the outer side of the breather valve body 7 are fixedly provided with connecting rods 13 fixedly connected with the housing 14, the edge positions of the bottoms of the connecting rods 13 and the housing 14 are fixedly connected through screws, the number of the connecting rods 13 is four, and the tail end of each connecting rod 13 is internally provided with a groove.

The working principle of the utility model is as follows: when the breather valve is used, the breather valve body 7 is arranged at the top of an external cold box, and when gas in the cold box leaks, the leaked gas can jack the valve plate 9 upwards;

furthermore, a main body shell 1 connected with the outer surface of the breather valve body 7 is arranged on the outer side of the shell 14, a gas flow cavity 8 is formed between the inner part of the main body shell 1 and the breather valve body 7, and when gas leaked from the inner part of the cold box jacks the valve plate 9, the leaked gas enters the inner side of the shell 14 and then escapes into the gas flow cavity 8 in an annular manner through the bottom of the shell 14, so that the leaked gas fills the inner space of the gas flow cavity 8;

from this can know, the leakage gas that is the annular loss enters into inside 3 central tubes at the center of multiunit intake pipe 4 and center in gas flow chamber 8, and then is detected out by oxygen detector 2, above can know, has fine gaseous effect of seizure to the carminative breather valve of current annular, makes leakage gas be full of gas flow chamber 8, and then by the timely detection out leakage condition of oxygen detector 2, improved leakage gas real-time detection's effect greatly.

Although embodiments of the present invention have been shown and described, the present embodiments are merely illustrative of the present invention and are not intended to limit the present invention, and the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples, and those skilled in the art can make modifications, substitutions, variations, etc. of the embodiments as required without departing from the principle and spirit of the present invention, but within the scope of the claims of the present invention.

Claims

1. The utility model provides a leak testing device in cold box, includes main part shell (1), its characterized in that: an oxygen detector (2) is arranged at the center of the top of the main body shell (1), and the bottom end of the oxygen detector (2) extends into the main body shell (1);

the bottom end of the inner side of the main body shell (1) is connected with a breather valve body (7), a gas flow cavity (8) is formed between the main body shell (1) and the breather valve body (7), an outer shell (14) positioned in the gas flow cavity (8) is arranged on the outer side of the breather valve body (7), and a valve plate (9) is movably arranged in the breather valve body (7);

oxygen detector (2) bottom just is located the inside position department of gas flow chamber (8) and is provided with center tube (3), the center tube (3) outside evenly is provided with multiunit intake pipe (4), the main part shell (1) outside evenly is provided with multiunit and intake pipe (4) looks dislocation and extends to check valve (6) in the main part shell (1) outside.

2. A cold box interior leak detection apparatus according to claim 1, wherein: the bottoms of the air inlet pipes (4) are uniformly provided with a plurality of air inlet holes (5), and the air inlet holes (5) are communicated with the gas flowing cavity (8).

3. A cold box interior leak detection apparatus according to claim 1, wherein: valve plate (9) top central point department of putting fixedly is provided with valve rod (11), shell (14) inboard top is fixed to be provided with support frame (10) of being connected with valve rod (11) movable support.

4. A cold box interior leakage detection apparatus according to claim 3, wherein: the top of the valve plate (9) is positioned between the outer side of the valve rod (11) and the support frame (10) and is fixedly connected with a spring (12), and a sliding cavity matched with the valve rod (11) is arranged at the center of the top of the shell (14).

5. A cold box interior leak detection apparatus according to claim 1, wherein: breather valve body (7) outside bottom four corners department all is fixed be provided with shell (14) fixed connection's connecting rod (13), and connecting rod (13) and shell (14) bottom edge position department pass through screw fixed connection.

6. A cold box internal leakage detection apparatus according to claim 5, wherein: the number of the connecting rods (13) is four, and grooves are formed in the tail ends of the connecting rods (13).