Thermometer pipe orifice structure

Abstract

The invention relates to a thermometer tube orifice structure which comprises a first connecting tube, a second connecting tube, a sealing plate and a flange, the sealing plate is welded to the free tail end of the inner side of the first connecting tube, the second connecting tube is arranged in an equipment cylinder in a penetrating mode and welded to the equipment cylinder, and the part, protruding out of the equipment cylinder, of the second connecting tube is welded to the flange. A plurality of rows of small holes are formed in the first connecting pipe in the axis direction of the first connecting pipe, an inner-layer silk screen is wound on the outer side of the first connecting pipe, an outer-layer silk screen is wound on the outer side of the inner-layer silk screen, the inner-layer silk screen and the outer-layer silk screen cover all the small holes, and the two ends of the inner-layer silk screen and the two ends of the outer-layer silk screen are all in spot welding with the first connecting pipe. And the middle parts of the inner-layer silk screen and the outer-layer silk screen are bound and fixed through a metal wire, so that the accuracy of temperature measurement of the working medium is greatly improved.

Description

[Technical field]

[0001] The invention relates to the field of pressure vessels, and in particular to a thermometer nozzle structure for pressure vessels. [Background technology]

[0002] A pressure vessel is a closed container that can withstand pressure. It has a wide range of uses and plays an important role in many sectors such as industry, civil industry, military industry, and many fields of scientific research. Among them, the most commonly used are in the chemical industry and petrochemical industry. The pressure vessels used in the petrochemical industry alone account for about 50% of the total number of pressure vessels. In the chemical and petrochemical fields, pressure vessels are mainly used in heat transfer, mass transfer, reaction and other process processes, as well as the storage and transportation of pressurized gas or liquefied gas. They are also widely used in other industrial and civil fields.

[0003] The thermometer used in pressure vessels mainly has the following functions: measuring the temperature of the working medium in the container, so that the temperature of the working medium is controlled within the specified range to meet the production process requirements. Please refer to the prior art CN218600716U, CN212539443U. Due to the pressure in the pressure vessel, the thermometer nozzle in the prior art generally adopts a closed structure, that is, a sleeve is used to isolate the thermometer from the medium, the medium is on the outside of the sleeve, and the thermometer is on the inside of the sleeve. Such a structure can prevent the pressure in the pressure vessel from impacting the thermometer. When measuring the temperature, the temperature of the working medium is transferred to the sleeve, and then the thermometer in the sleeve detects the temperature of the sleeve as the temperature of the working medium. The defect of the thermometer nozzle structure of this structure is that there is actually a temperature difference between the temperature of the sleeve and the temperature of the working medium. Using the temperature of the sleeve as the temperature of the working medium results in the measured temperature of the working medium being inaccurate.

[0004] Therefore, we thought about how to improve the traditional thermometer tube structure so that the working medium can pass through the sleeve, so that the thermometer in the sleeve can directly contact the working medium to measure the most real temperature of the working medium while avoiding the pressure of the working medium from damaging the thermometer in the sleeve. [Summary of the invention]

[0005] In order to solve the above problems, the object of the present invention is to provide a thermometer nozzle structure which can improve the detection accuracy of the working medium temperature.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a thermometer nozzle structure, including: a first connecting pipe, a second connecting pipe, a sealing plate and a flange, the sealing plate is welded to the inner free end of the first connecting pipe, the second connecting pipe is penetrated into the equipment cylinder and welded to the equipment cylinder, the part of the second connecting pipe protruding out of the equipment cylinder is welded to the flange, the first connecting pipe is provided with several rows of small holes along its axial direction, the outer side of the first connecting pipe is wrapped with an inner layer of wire mesh, the outer side of the inner layer of wire mesh is wrapped with an outer layer of wire mesh, the inner layer of wire mesh and the outer layer of wire mesh cover all the small holes, both ends of the inner layer of wire mesh and the outer layer of wire mesh are spot welded to the first connecting pipe, and the middle of the inner layer of wire mesh and the outer layer of wire mesh are fixed by binding with metal wire.

[0007] Preferably, a thermometer nozzle structure in the present invention is further configured as follows: the first connecting pipe is vertically arranged to the equipment cylinder, and a rib plate is provided between the first connecting pipe and the equipment cylinder.

[0008] Preferably, a thermometer nozzle structure in the present invention is further configured as follows: the material of the first connecting pipe, the second connecting pipe, the sealing plate and the rib plate is the same as that of the equipment barrel.

[0009] Preferably, a thermometer nozzle structure in the present invention is further configured as follows: the wall thickness of the second connecting pipe is thicker than the wall thickness of the first connecting pipe.

[0010] Preferably, a thermometer nozzle structure in the present invention is further configured as follows: the inner wire mesh, the outer wire mesh and the metal wire are all made of stainless steel material.

[0011] Preferably, a thermometer nozzle structure in the present invention is further configured as follows: the first connecting pipe is provided with three rows of small holes along its axial direction, the three rows of small holes include two upper rows of small holes and one lower row of small holes, the two upper rows of small holes are respectively arranged at an angle of 30° to the central axis, and the one lower row of small holes is located on the central axis.

[0012] Preferably, a thermometer nozzle structure in the present invention is further configured as follows: the inner wire mesh is overlapped by 50 mm at its edges when being wound.

[0013] Preferably, a thermometer nozzle structure in the present invention is further configured as follows: the outer wire mesh is overlapped by 50 mm at its edges when being wound.

[0014] Preferably, a thermometer nozzle structure in the present invention is further configured as follows: the overlapping edge of the inner layer screen and the overlapping edge of the outer layer screen are staggered in the circumferential direction.

[0015] Preferably, a thermometer nozzle structure in the present invention is further configured such that when the inner layer wire mesh and the outer layer wire mesh are bound and fixed by wire, the position of the wire binding is staggered with the position of the small hole on the first connecting pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the nozzle structure of the thermometer in the present invention is designed as a structure of a small hole plus a wire mesh, so that the working medium can pass through the nozzle, so that the thermometer can directly contact the working medium to measure the most real temperature of the working medium, and impurities in the working medium can be prevented from entering the nozzle to damage the thermometer. In addition, the impact of the working medium pressure on the thermometer can be alleviated by setting the small hole, thereby increasing the service life of the thermometer.

Brief Description of the Drawings

[0017] Figure 1 It is a structural schematic diagram of the thermometer nozzle in the present invention.

[0018] Figure 2 For along Figure 1 Schematic diagram of the cross-sectional structure of AA shown.

[0019] Figure 1 and Figure 2 Middle: 1. First connecting pipe, 10. Upper row of small holes, 11. Lower row of small holes, 2. Second connecting pipe, 3. Sealing plate, 4. Flange, 5. Equipment cylinder, 6. Rib plate, 7. Inner wire mesh, 70. Overlapping edge of inner wire mesh, 8. Outer wire mesh, 80. Overlapping edge of outer wire mesh, 9. Metal wire. [Specific implementation method]

[0020] The following is a further detailed description of a thermometer nozzle structure of the present invention through specific embodiments.

[0021] Ginseng Figure 1 and Figure 2As shown, a thermometer nozzle structure includes: a first connecting pipe 1, a second connecting pipe 2, a sealing plate 3 and a flange 4. In this embodiment, the first connecting pipe 1 is vertically arranged with the equipment barrel 5, and a rib plate 6 is arranged between the first connecting pipe 1 and the equipment barrel 5. The arrangement of the rib plate 6 can improve the connection strength between the first connecting pipe 1 and the equipment barrel 5. The material of the first connecting pipe 1, the second connecting pipe 2, the sealing plate 3 and the rib plate 6 is the same as that of the equipment barrel 5. The sealing plate 3 is welded to the inner free end of the first connecting pipe 1, the second connecting pipe 2 is penetrated in the equipment barrel 5 and welded to the equipment barrel 5, and the part of the second connecting pipe 2 protruding out of the equipment barrel 5 is welded to the flange 4. The wall thickness of the second connecting pipe 2 is thicker than that of the first connecting pipe 1. This is mainly because the pressure of the equipment is high, and the thickening of the connecting pipe wall thickness at the barrel opening is conducive to improving the structural strength. The first pipe 1 is provided with three rows of small holes along its axis direction, including two rows of upper rows of small holes 10 and one row of lower rows of small holes 11. The two rows of upper rows of small holes 10 are arranged at an angle of 30° with the central axis, and the one row of lower rows of small holes 11 is located on the central axis. This arrangement of small holes can greatly reduce the impact of the working medium on the thermometer. The outer side of the first pipe 1 is wrapped with an inner layer of wire mesh 7, and the outer side of the inner layer of wire mesh 7 is wrapped with an outer layer of wire mesh 8. The inner layer of wire mesh 7 and the outer layer of wire mesh 8 cover all the small holes. Both ends of the inner layer of wire mesh 7 and the outer layer of wire mesh 8 are spot welded to the first pipe 1. The middle of the inner layer of wire mesh 7 and the outer layer of wire mesh 8 are tied and fixed by metal wire 9. When the metal wire 9 is tied and fixed, the position of the metal wire 9 is staggered with the position of the small hole on the first pipe 1 to avoid blocking the small hole. In this embodiment, the inner layer of wire mesh 7, the outer layer of wire mesh 8 and the metal wire 9 are all made of stainless steel, so they have high corrosion resistance. The inner wire mesh 7 is overlapped by 50 mm at its edges when being wound, and the outer wire mesh 8 is overlapped by 50 mm at its edges when being wound. The overlapping edge 70 of the inner wire mesh 7 and the overlapping edge 80 of the outer wire mesh 8 are staggered in the circumferential direction. The advantage of such a design is that even if the metal wire 9 bound outside is loosened after the equipment has been used for a long time, the wire mesh will not be unable to cover the small holes.

[0022] In summary, the thermometer nozzle structure in the present invention is designed as a small hole plus wire mesh structure, so that the working medium can pass through the nozzle, so that the thermometer can directly contact the working medium to measure the most real temperature of the working medium, and impurities in the working medium can be prevented from entering the nozzle and causing damage to the thermometer. In addition, the impact of the working medium pressure on the thermometer can be alleviated by setting the small hole, thereby increasing the service life of the thermometer.

[0023] The above-mentioned embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A thermometer nozzle structure, comprising: A first connecting pipe, a second connecting pipe, a sealing plate and a flange, the sealing plate is welded to the inner free end of the first connecting pipe, the second connecting pipe is inserted into the equipment cylinder and welded to the equipment cylinder, and the part of the second connecting pipe protruding from the equipment cylinder is welded to the flange, characterized in that: the first connecting pipe is provided with several rows of small holes along its axial direction, the outer side of the first connecting pipe is wrapped with an inner layer of wire mesh, the outer side of the inner layer of wire mesh is wrapped with an outer layer of wire mesh, the inner layer of wire mesh and the outer layer of wire mesh cover all the small holes, both ends of the inner layer of wire mesh and the outer layer of wire mesh are spot welded to the first connecting pipe, and the middle of the inner layer of wire mesh and the outer layer of wire mesh are bound and fixed by metal wire.

2. A thermometer nozzle structure according to claim 1, characterized in that: The first connecting pipe is vertically arranged with the equipment cylinder, and a rib plate is arranged between the first connecting pipe and the equipment cylinder.

3. A thermometer nozzle structure according to claim 2, characterized in that: The material of the first connecting pipe, the second connecting pipe, the sealing plate and the rib plate is the same as that of the equipment cylinder.

4. A thermometer nozzle structure according to claim 1, characterized in that: The wall thickness of the second connecting pipe is thicker than the wall thickness of the first connecting pipe.

5. A thermometer nozzle structure according to claim 1, characterized in that: The inner wire mesh, the outer wire mesh and the metal wire are all made of stainless steel.

6. A thermometer nozzle structure according to claim 1, characterized in that: The first pipe is provided with three rows of small holes along its axial direction, including two upper rows of small holes and one lower row of small holes, the two upper rows of small holes are respectively arranged at an angle of 30° to the central axis, and the one lower row of small holes is located on the central axis.

7. A thermometer nozzle structure according to claim 1, characterized in that: The inner wire mesh is arranged to overlap by 50 mm at its edges when being wound.

8. A thermometer nozzle structure according to claim 1, characterized in that: The outer wire mesh is arranged to overlap by 50 mm at its edges when being wound.

9. A thermometer nozzle structure according to claim 1, characterized in that: The overlapping edge of the inner layer screen and the overlapping edge of the outer layer screen are staggered in the circumferential direction.

10. A thermometer nozzle structure according to claim 1, characterized in that: When the inner layer wire mesh and the outer layer wire mesh are bound and fixed by the metal wire, the position of the metal wire binding is staggered with the position of the small hole on the first connecting pipe.

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