Thermometer pipe orifice structure
By designing a small hole and adding a wire mesh structure at the inlet of the thermometer tube in the pressure vessel, the problems of the thermometer's inability to accurately measure the medium temperature and its susceptibility to damage were solved, thus achieving accurate measurement of the medium temperature and protection of the thermometer.
Patent Information
- Application Number
- CN202520179971.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-02-05
AI Technical Summary
The thermometer port structure in existing pressure vessels cannot accurately measure the temperature of the working medium and is easily damaged by the pressure of the medium.
Design a thermometer nozzle structure that uses a small hole and wire mesh. The inner and outer wire meshes cover the small hole and are fixed with metal wires. The material is stainless steel. The edges of the inner and outer wire meshes are staggered and the metal wires are tied and fixed to ensure that the thermometer is in direct contact with the medium and to prevent impurities from entering.
This improves the accuracy of temperature detection and extends the lifespan of the thermometer, while preventing damage from the impact of medium pressure.
Smart Images
Figure CN223769640U_ABST
Abstract
Description
[Technical Field]
[0001] This utility model 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 sealed container capable of withstanding pressure. Pressure vessels have extremely wide applications, playing a vital role in many sectors including industry, civil use, military, and scientific research. They are most prevalent in the chemical and petrochemical industries, accounting for approximately 50% of all pressure vessels used in these sectors alone. In the chemical and petrochemical fields, pressure vessels are primarily used for heat transfer, mass transfer, and reaction processes, as well as for storing and transporting pressurized gases or liquefied gases. They also have wide applications in other industrial and civil sectors.
[0003] Thermometers used in pressure vessels primarily serve the following functions: measuring the temperature of the working medium inside the vessel and controlling its temperature within a specified range to meet production process requirements. Please refer to existing technologies CN218600716U and CN212539443U. Due to the pressure inside the pressure vessel, existing thermometers generally employ a closed structure at the inlet, using a sleeve to isolate the thermometer from the medium. The medium is on the outside of the sleeve, and the thermometer is on the inside. This structure prevents the pressure inside the pressure vessel from impacting the thermometer. Specifically, the temperature of the working medium is transferred to the sleeve, and then the thermometer inside the sleeve detects the temperature of the sleeve to obtain the working medium temperature. The drawback of this thermometer inlet structure is that there is actually a temperature difference between the sleeve temperature and the working medium temperature. Using the sleeve temperature as the working medium temperature results in inaccurate measurements.
[0004] Therefore, we considered how to improve the traditional thermometer tube structure so that the working medium can pass through the sleeve, allowing the thermometer inside the sleeve to directly contact the working medium and measure its true temperature, while also preventing the working medium pressure from damaging the thermometer inside the sleeve. [Utility Model Content]
[0005] To address the aforementioned problems, the purpose of this invention is to provide a thermometer nozzle structure that can improve the accuracy of working medium temperature detection.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a thermometer tube structure, comprising: a first connecting pipe, a second connecting pipe, a sealing plate, and a flange. The sealing plate is welded to the free end of the inner side of the first connecting pipe. The second connecting pipe passes through the equipment cylinder and is welded to the equipment cylinder. The part of the second connecting pipe protruding from the equipment cylinder is welded to the flange. The first connecting pipe has several rows of small holes along its axial direction. An inner layer of wire mesh is wound around the outer side of the first connecting pipe. An outer layer of wire mesh is wound around the outer side of the inner layer of wire mesh. The inner and outer layers of wire mesh cover all the small holes. Both ends of the inner and outer layers of wire mesh are spot welded to the first connecting pipe. The middle of the inner and outer layers of wire mesh is bound and fixed by metal wire.
[0007] Preferably, the thermometer nozzle structure of this utility model is further configured such that: the first connecting pipe is arranged perpendicularly to the equipment cylinder, and a stiffening plate is provided between the first connecting pipe and the equipment cylinder.
[0008] Preferably, the thermometer nozzle structure of this utility model is further configured such that the materials of the first connecting pipe, the second connecting pipe, the sealing plate and the stiffening plate are the same as those of the equipment cylinder.
[0009] Preferably, the thermometer tube structure of this utility model is further configured such that the wall thickness of the second tube is greater than the wall thickness of the first tube.
[0010] Preferably, the thermometer tube structure of this utility model is further configured such that the inner wire mesh, the outer wire mesh and the metal wire are all made of stainless steel.
[0011] Preferably, the thermometer tube structure of this utility model is further configured such that: the first tube has three rows of small holes along its axial direction, including two rows of upper holes and one row of lower holes, the two rows of upper holes are respectively set at a 30° angle with the central axis, and the one row of lower holes is located on the central axis.
[0012] Preferably, the thermometer tube structure of this utility model is further configured such that the inner wire mesh overlaps by 50mm at its edges during winding.
[0013] Preferably, the thermometer tube opening structure of this utility model is further configured such that the outer wire mesh overlaps by 50mm at its edges during winding.
[0014] Preferably, the thermometer tube structure of this utility model is further configured such that the overlapping edge of the inner wire mesh and the overlapping edge of the outer wire mesh are staggered in the circumferential direction.
[0015] Preferably, a thermometer nozzle structure in the present utility model is further configured as follows: when the inner wire mesh and the outer wire mesh are fixed by bundling with metal wires in the middle, the position of the metal wire bundling is staggered from the position of the small holes on the first nozzle.
[0016] Compared with the prior art, the present utility model has the following beneficial effects: the thermometer nozzle structure in the present utility model is designed as a structure of small holes plus wire mesh, so that the working medium can penetrate into the nozzle, enabling the thermometer to directly contact the working medium to measure the most real temperature of the working medium, and at the same time, it can prevent impurities in the working medium from entering the nozzle and damaging the thermometer. In addition, by setting small holes, the impact of the working medium pressure on the thermometer can be alleviated, thereby improving the service life of the thermometer.
Description of the Drawings
[0017] Figure 1 It is a schematic structural diagram of the thermometer nozzle in the present utility model.
[0018] Figure 2 In [reference numeral not provided in the original] Figure 1 Figure 1 it is a schematic cross-sectional structural diagram taken along A-A as shown.
[0019] Figure 1 and Figure 2 in [reference numeral not provided in the original]
Specific Embodiments
[0020] The following further describes in detail a thermometer nozzle structure according to the present utility model through specific embodiments.
[0021] Refer to 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 perpendicular to the equipment cylinder 5, and a stiffening plate 6 is provided between the first connecting pipe 1 and the equipment cylinder 5. The stiffening plate 6 improves the connection strength between the first connecting pipe 1 and the equipment cylinder 5. The materials of the first connecting pipe 1, the second connecting pipe 2, the sealing plate 3, and the stiffening plate 6 are the same as those of the equipment cylinder 5. The sealing plate 3 is welded to the free end of the inner side of the first connecting pipe 1. The second connecting pipe 2 passes through the equipment cylinder 5 and is welded to the equipment cylinder 5. The portion of the second connecting pipe 2 protruding from the equipment cylinder 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 equipment pressure is high, and the increased wall thickness of the connecting pipe at the opening in the cylinder helps to improve the structural strength. The first connecting pipe 1 has three rows of small holes along its axial direction, including two upper rows of small holes 10 and one lower row of small holes 11. The two upper rows of small holes 10 are set at a 30° angle to the central axis, and the lower row 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. An inner layer of wire mesh 7 is wound around the outside of the first connecting pipe 1, and an outer layer of wire mesh 8 is wound around the outside of the inner layer of wire mesh 7. The inner layer of wire mesh 7 and the outer layer of wire mesh 8 cover all the small holes. The two ends of the inner layer of wire mesh 7 and the outer layer of wire mesh 8 are spot welded to the first connecting pipe 1. The middle of the inner layer of wire mesh 7 and the outer layer of wire mesh 8 is bound and fixed by a metal wire 9. When the metal wire 9 is bound and fixed, the position of the metal wire 9 is staggered from the position of the small holes on the first connecting pipe 1 to avoid blocking the small holes. 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, thus having high corrosion resistance. The inner layer of wire mesh 7 overlaps its edges by 50mm during winding, and the outer layer of wire mesh 8 overlaps its edges by 50mm during winding. The overlapping edges 70 of the inner layer of wire mesh 7 and the overlapping edges 80 of the outer layer of wire mesh 8 are staggered in the circumferential direction. The advantage of this design is that even if the outer metal wire 9 loosens after long-term use, the wire mesh will still cover the small holes.
[0022] In summary, the thermometer orifice structure of this utility model, by designing the orifice structure as a small hole with a wire mesh, allows the working medium to pass through the orifice, enabling the thermometer to directly contact the working medium and measure the most accurate temperature of the working medium. At the same time, it avoids impurities in the working medium from entering the orifice and damaging the thermometer. In addition, the small hole can alleviate the impact of the working medium pressure on the thermometer, thereby improving the service life of the thermometer.
[0023] The above embodiments are merely illustrative of the principles and effects of this utility model, as well as some of its applications, and are not intended to limit this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.
Claims
1. A thermometer well structure, comprising: The first connecting pipe, the second connecting pipe, the sealing plate and the flange, the sealing plate is welded to the inner side free end of the first connecting pipe, the second connecting pipe is arranged in the equipment cylinder and is welded with the equipment cylinder, the part of the second connecting pipe protruding out of the equipment cylinder is welded with the flange, characterized in that: a plurality of rows of small holes are arranged along the axial direction of the first connecting pipe, the outer side of the first connecting pipe is wound with an inner layer wire mesh, the outer side of the inner layer wire mesh is wound with an outer layer wire mesh, the inner layer wire mesh and the outer layer wire mesh cover all the small holes, both ends of the inner layer wire mesh and the outer layer wire mesh are spot welded with the first connecting pipe, and the middle of the inner layer wire mesh and the outer layer wire mesh is fixed by a metal wire.
2. A thermometer well structure as defined in claim 1, wherein: 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 well structure as defined in claim 2, wherein: 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 well structure as defined in claim 1, wherein: The wall thickness of the second connecting pipe is thicker than that of the first connecting pipe.
5. A thermometer well structure as defined in claim 1, wherein: The inner layer wire mesh, the outer layer wire mesh and the metal wire are all made of stainless steel material.
6. A thermometer well structure as defined in claim 1, wherein: Three rows of small holes are arranged along the axial direction of the first connecting pipe, including two rows of upper rows of small holes and one row of lower rows of small holes, the two rows of upper rows of small holes are arranged at an angle of 30° with the central axis, and the one row of lower rows of small holes is located on the central axis.
7. A thermometer well structure as defined in claim 1, wherein: When the inner layer wire mesh is wound, the edges thereof are overlapped by 50mm.
8. A thermometer well structure as defined in claim 1, wherein: When the outer layer wire mesh is wound, the edges thereof are overlapped by 50mm.
9. A thermometer well structure as defined in claim 1, wherein: The edge overlap of the inner layer wire mesh and the edge overlap of the outer layer wire mesh are staggered in the circumferential direction.
10. A thermometer well structure as defined in claim 1, wherein: When the inner layer wire mesh and the outer layer wire mesh are fixed by the metal wire, the position of the metal wire is staggered with the position of the small hole on the first connecting pipe.