Explosion-proof pipeline heater

Abstract

The utility model relates to the technical field of heaters, in particular to an anti-explosion pipeline heater which comprises a shell, a pressure relief mechanism is arranged above one side of the outer wall of the shell, the pressure relief mechanism comprises an exhaust pipe, when the pressure in the shell is too large, redundant gas can be exhausted from the exhaust pipe and enter a buffer cavity, and the pressure in the buffer cavity is not too large. Due to the fact that the internal space of the buffering cavity is large, the flow speed of airflow is slowed down, heat and cooling gas are rapidly absorbed when the airflow enters the metal pipe wall of the cooling pipe, then the airflow is exhausted from the exhaust holes, due to the fact that the number of the exhaust holes is large and the hole diameter is small, the flow speed of the gas is slowed down, the impact force of ejected gas is prevented from being increased, and ejected tiny gas columns can further assist in cooling. The problem that due to the fact that a pressure relief opening for spraying high-temperature gas lacks protective measures, the sprayed gas is prone to burning the skin of passing personnel is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of heaters, in particular to an explosion-proof pipeline heater. Background Technique

[0002] A pipeline heater is an energy-saving device for preheating substances. It can directly heat substances, enabling them to circulate and heat in a high-temperature environment, ultimately achieving the purpose of saving energy. It is widely used in occasions such as preheating heavy oil, asphalt, refined oil and other fuel oils. The pipeline heater consists of two parts: a main body and a control system. The heating element uses a stainless steel steel pipe as a protective sleeve, a high-temperature resistance alloy wire, and crystalline magnesium oxide powder, which are formed by a compression process. The control part is composed of an advanced digital circuit, an integrated circuit trigger, a high reverse voltage thyristor, etc. to form an adjustable temperature measurement and constant temperature system, ensuring the normal operation of the electric heater.

[0003] The prior art such as the publication number CN213541431U provides an explosion-proof pipeline heater, including: a heater housing, a cylindrical structure standing vertically, with a medium inlet and outlet provided at the lower end face; a heating connection cylinder, arranged above the heater housing, and a plurality of electric heating straight pipes are arranged on the heating connection cylinder, and the electric heating straight pipes extend into the inner cavity of the heater housing from the upper port of the heater housing; an explosion-proof valve body, fixedly arranged on the upper half of the side wall of the heater housing and communicating with the inner cavity of the heater housing. Adopting a gas-liquid double-closed structure, it realizes the sealing and explosion-proof effect of the heater for liquid media, effectively avoiding the occurrence of safety accidents and preventing the heater from being scrapped due to excessive internal pressure.

[0004] In this solution, when the pressure exerted by the air pressure inside the heater on the explosion-proof plate is greater than the compression force of the compression spring, the explosion-proof plate slides to the right, and the inner cavity of the heater communicates with the explosion-proof cavity, and pressure is relieved through the pressure relief port, playing an explosion-proof role. However, during actual use, the ejected high-pressure gas has a relatively high temperature. The pressure relief port that ejects the high-temperature gas lacks protective measures, and the ejected gas is likely to burn the skin of the passing personnel. Moreover, the spring will have a certain weakening of its own elasticity in a high-temperature environment. In view of this, we propose an explosion-proof pipeline heater. Content of the Utility Model

[0005] The purpose of the utility model is to provide an explosion-proof pipeline heater, which solves the problem that the pressure relief port that ejects high-temperature gas lacks protective measures, and the ejected gas is likely to burn the skin of the passing personnel.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An explosion-proof pipeline heater includes a housing. Above one side of the outer wall of the housing, a pressure relief mechanism is provided. The pressure relief mechanism includes an exhaust pipe, the exhaust pipe is connected to the front of the housing wall, the top of the exhaust pipe is connected to a buffer chamber, the top of the buffer chamber is connected to a cooling pipe, and the cooling pipe is arranged in a vortex shape. Exhaust holes are formed in the pipe wall of the cooling pipe. When the pressure inside the housing is too high, the excess gas will be discharged from the exhaust pipe and enter the buffer chamber. Since the internal space of the buffer chamber is large, the air flow velocity slows down. When entering the cooling pipe, the metal pipe wall quickly absorbs heat to cool the gas, and then the gas is discharged from the exhaust holes. Since the number of exhaust holes is large and the aperture is small, the gas flow velocity slows down to avoid the increase of the ejection impact force, and the ejected fine air columns can further assist in cooling, so as to avoid the problem that the ejected high-temperature gas from the pressure relief port lacks protection measures and the ejected gas is easy to burn the skin of the passing personnel.

[0008] Preferably, a cavity is formed in the housing wall. Support strips are connected to the inner wall of the cavity, and the support strips are evenly arranged in a ring shape on the inner wall of the cavity. By providing the cavity, it has a certain heat preservation effect, and the double-layer housing has higher strength.

[0009] Preferably, a heater body is connected to the bottom of the housing. A heating pipe fitting is connected to the top of the heater body, and the heating pipe fitting is inside the housing. The heating pipe fitting is arranged in a spiral shape. The heater body heats the medium inside the housing through the heating pipe fitting.

[0010] Preferably, a medium circulation pipe is provided below the front of the housing wall, and the medium circulation pipe is communicated with the inside of the housing for the circulation of the medium.

[0011] Preferably, a stop valve is connected to the inner wall of the exhaust pipe, and a sliding cylinder is slidably connected to the top of the exhaust pipe.

[0012] Preferably, a counterweight is connected to the top of the sliding cylinder. Through holes are formed in the cylinder wall of the sliding cylinder, and the through holes are arranged vertically and are arranged in a way that is smaller at the top and larger at the bottom. By means of the sliding cylinder sliding on the inner wall of the exhaust pipe and the weight of the counterweight, it can be ensured that the exhaust pipe is in a closed state under normal pressure. When the air pressure is too high, the expanded gas will push the sliding cylinder to slide, exposing the through holes for pressure relief. The more through holes are pushed out, the faster the pressure relief speed is, and the through holes are arranged in a way that is smaller at the top and larger at the bottom, further improving the exhaust speed under high pressure.

[0013] Preferably, a retaining ring is connected to the top of the inner wall of the exhaust pipe, and a limiting ring is connected to the bottom of the outer wall of the sliding cylinder to prevent the sliding cylinder from detaching from the exhaust pipe.

[0014] By means of the above technical solution, the present invention provides an explosion-proof pipeline heater, which at least has the following beneficial effects:

[0015] 1. When the pressure inside the housing of the present utility model is too high, the excess gas will be discharged from the exhaust pipe and enter the buffer chamber. Since the internal space of the buffer chamber is relatively large, the flow rate of the air flow slows down. When it enters the cooling pipe, the heat is quickly absorbed by the metal pipe wall, cooling the gas, and then discharged from the exhaust holes. Since the number of exhaust holes is large and the hole diameter is small, the gas flow rate slows down, avoiding the increase of the impact force during spraying, and the ejected fine air column can further assist in cooling, so as to avoid the problem that the relief port spraying high-temperature gas lacks protective measures and the ejected gas is likely to burn the skin of the passing personnel.

[0016] 2. The present utility model can ensure that the exhaust pipe is in a closed state under normal pressure by means of the sliding cylinder sliding on the inner wall of the exhaust pipe and the weight of the counterweight block. When the air pressure is too high, the expanded gas will push the sliding cylinder to slide, exposing the through holes for pressure relief. The more through holes are pushed out, the faster the pressure relief speed is. And the through holes are arranged in a way that the upper part is small and the lower part is large, further improving the exhaust speed under high pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present utility model and form a part of this application:

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a partial cross-sectional view of the present utility model;

[0020] Figure 3 is a schematic diagram of the structure of the pressure relief mechanism in the present utility model;

[0021] Figure 4 is a partial cross-sectional view of the exhaust pipe in the present utility model.

[0022] In the figure: 1. Housing; 11. Cavity; 12. Support strip; 13. Medium circulation pipe; 2. Heater body; 21. Heating pipe fitting; 3. Pressure relief mechanism; 31. Exhaust pipe; 311. Cut-off valve; 312. Sliding cylinder; 313. Counterweight block; 314. Through hole; 315. Retaining ring; 316. Limiting ring; 32. Buffer chamber; 33. Cooling pipe; 34. Exhaust hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0024] An explosion-proof pipeline heater, as Figure 1 - Figure 4 shown, includes a housing 1. Above one side of the outer wall of the housing 1, a pressure relief mechanism 3 is provided. The pressure relief mechanism 3 includes an exhaust pipe 31. The exhaust pipe 31 is connected to the front of the wall of the housing 1. The top of the exhaust pipe 31 is connected to a buffer chamber 32. The top of the buffer chamber 32 is connected to a cooling pipe 33. And the cooling pipe 33 is arranged in a spiral shape. Exhaust holes 34 are formed in the pipe wall of the cooling pipe 33. When the pressure inside the housing 1 is too high, the excess gas will be discharged from the exhaust pipe 31 and enter the buffer chamber 32. Since the internal space of the buffer chamber 32 is relatively large, the air flow velocity slows down. When entering the cooling pipe 33, the metal pipe wall quickly absorbs heat to cool the gas, and then the gas is discharged from the exhaust holes 34. Since the number of exhaust holes 34 is large and the aperture is small, the gas flow velocity slows down to avoid the increase of the ejection impact force. And the ejected fine gas columns can further assist in cooling, so as to avoid the problem that the ejected gas from the pressure relief port of the high-temperature gas is likely to burn the skin of the passing personnel due to the lack of protection measures. A cavity 11 is formed in the wall of the housing 1. Support bars 12 are connected to the inner wall of the cavity 11. And the support bars 12 are evenly arranged in a ring shape on the inner wall of the cavity 11. By providing the cavity 11, it has a certain heat preservation effect. The double-layer housing 1 has higher strength. The bottom of the housing 1 is connected to a heater body 2. The top of the heater body 2 is connected to a heating pipe fitting 21. And the heating pipe fitting 21 is inside the housing 1. The heating pipe fitting 21 is arranged in a spiral shape. The heater body 2 heats the medium inside the housing 1 through the heating pipe fitting 21. Below the front of the wall of the housing 1, a medium circulation pipe 13 is provided. And the medium circulation pipe 13 is communicated with the inside of the housing 1 for the circulation of the medium.

[0025] In this embodiment, the medium circulation pipe 13 is used for the circulation of the medium. The heater body 2 heats the medium inside the housing 1 through the heating pipe fitting 21. When the pressure inside the housing 1 is too high, the excess gas will be discharged from the exhaust pipe 31 and enter the buffer chamber 32. Since the internal space of the buffer chamber 32 is relatively large, the air flow velocity slows down. When entering the cooling pipe 33, the metal pipe wall quickly absorbs heat to cool the gas, and then the gas is discharged from the exhaust holes 34. Since the number of exhaust holes 34 is large and the aperture is small, the gas flow velocity slows down to avoid the increase of the ejection impact force. And the ejected fine gas columns can further assist in cooling, so as to avoid the problem that the ejected gas from the pressure relief port of the high-temperature gas is likely to burn the skin of the passing personnel due to the lack of protection measures. Embodiment

[0026] As Figure 4As shown, a stop valve 311 is connected to the inner wall of the exhaust pipe 31. A sliding cylinder 312 is slidably connected to the top of the exhaust pipe 31. A counterweight 313 is connected to the top of the sliding cylinder 312. Through holes 314 are formed in the wall of the sliding cylinder 312, and the through holes 314 are arranged vertically and are set in a way that is smaller at the top and larger at the bottom. By means of the sliding cylinder 312 sliding on the inner wall of the exhaust pipe 31 in cooperation with the weight of the counterweight 313, it can be ensured that the exhaust pipe 31 is in a closed state under normal pressure. When the air pressure is too high, the expanded gas will push the sliding cylinder 312 to slide, exposing the through holes 314 for pressure relief. The more through holes 314 are pushed out and exposed, the faster the pressure relief speed. Moreover, the through holes 314 are set in a way that is smaller at the top and larger at the bottom, further improving the exhaust speed under high pressure. A retaining ring 315 is connected to the top of the inner wall of the exhaust pipe 31, and a limiting ring 316 is connected to the bottom of the outer wall of the sliding cylinder 312 to prevent the sliding cylinder 312 from detaching from the exhaust pipe 31.

[0027] In this embodiment, by means of the sliding cylinder 312 sliding on the inner wall of the exhaust pipe 31 in cooperation with the weight of the counterweight 313, it can be ensured that the exhaust pipe 31 is in a closed state under normal pressure. When the air pressure is too high, the expanded gas will push the sliding cylinder 312 to slide, exposing the through holes 314 for pressure relief. The more through holes 314 are pushed out and exposed, the faster the pressure relief speed. Moreover, the through holes 314 are set in a way that is smaller at the top and larger at the bottom, further improving the exhaust speed under high pressure.

[0028] When the explosion-proof pipeline heater of the present utility model is in use, the medium flow pipe 13 is used for the flow of the medium. The heater body 2 heats the medium inside the housing 1 through the heating pipe fittings 21. When the pressure inside the housing 1 is too high, by means of the sliding cylinder 312 sliding on the inner wall of the exhaust pipe 31 in cooperation with the weight of the counterweight 313, it can be ensured that the exhaust pipe 31 is in a closed state under normal pressure. When the air pressure is too high, the expanded gas will push the sliding cylinder 312 to slide, exposing the through holes 314 for pressure relief. The more through holes 314 are pushed out and exposed, the faster the pressure relief speed. Moreover, the through holes 314 are set in a way that is smaller at the top and larger at the bottom, further improving the exhaust speed under high pressure. The exhausted gas enters the buffer chamber 32. Since the internal space of the buffer chamber 32 is relatively large, the air flow velocity slows down. When entering the cooling pipe 33, the metal pipe wall quickly absorbs heat to cool the gas, and then the gas is discharged from the exhaust holes 34. Since the number of exhaust holes 34 is large and the hole diameter is small, the gas flow velocity slows down to avoid the increase of the ejection impact force, and the ejected fine gas columns can further assist in cooling, so as to avoid the problem that the ejected gas from the pressure relief port of the high-temperature gas is easy to burn the skin of the passing personnel due to the lack of protective measures.

[0029] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0030] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof pipe heater, comprising a housing (1), characterized in that: A pressure relief mechanism (3) is arranged above one side of the outer wall of the outer shell (1), and the pressure relief mechanism (3) comprises an exhaust pipe (31). The exhaust pipe (31) is connected to the front side of the shell wall of the outer shell (1), and the top of the exhaust pipe (31) is connected to a buffer chamber (32). The top of the buffer chamber (32) is connected to a cooling pipe (33), and the cooling pipe (33) is arranged in a vortex shape. The wall of the cooling pipe (33) is provided with an exhaust hole (34).

2. The explosion-proof pipe heater according to claim 1, characterized in that: A cavity (11) is provided in the shell wall of the outer shell (1), the inner wall of the cavity (11) is connected to a support bar (12), and the support bar (12) is evenly arranged in a ring shape on the inner wall of the cavity (11).

3. The explosion-proof pipe heater according to claim 1, characterized in that: The bottom of the outer shell (1) is connected to a heater body (2), the top of the heater body (2) is connected to a heating pipe (21), and the heating pipe (21) is located inside the outer shell (1), and the heating pipe (21) is arranged in a spiral shape.

4. The explosion-proof pipe heater according to claim 1, characterized in that: A medium circulation pipe (13) is provided below the front surface of the shell wall of the shell (1), and the medium circulation pipe (13) is connected to the interior of the shell (1) for circulation of the medium.

5. The explosion-proof pipe heater according to claim 1, characterized in that: The inner wall of the exhaust pipe (31) is connected to a stop valve (311), and the top of the exhaust pipe (31) is slidably connected to a slide cylinder (312).

6. The explosion-proof pipe heater according to claim 5, characterized in that: A counterweight (313) is connected to the top of the slide cylinder (312), and a through hole (314) is provided on the wall of the slide cylinder (312). The through holes (314) are arranged in a vertical manner and are arranged in a manner of being smaller at the top and larger at the bottom.

7. The explosion-proof pipe heater according to claim 5, characterized in that: The top of the inner wall of the exhaust pipe (31) is connected to a retaining ring (315), and the bottom of the outer wall of the slide cylinder (312) is connected to a limiting ring (316).

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