Explosion-proof device for heat exchanger

Abstract

The utility model relates to the technical field of heat exchanger equipment, and provides an explosion-proof device for a heat exchanger, which comprises a fire barrel, a burner, a conveying pipeline and a smoke outlet, the fire barrel is connected with the burner and the conveying pipeline, an explosion-proof pipe is arranged at the third-stage guide pipe section of the conveying pipeline, the explosion-proof pipe comprises a door spindle and a sealing plate, and the door spindle is connected with the smoke outlet. The sealing plate is unidirectionally hinged through a door shaft, and when the internal pressure of the system exceeds a threshold value, the sealing plate is impacted by air pressure to open pressure relief. And through the arrangement of the anti-explosion pressure relief mechanism and the pressure stabilizing device, the running stability of the heat exchanger is improved through the anti-explosion and pressure stabilizing composite design.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger equipment technical field, concretely relates to heat exchanger explosion -proof device. BACKGROUND

[0002] As the key equipment of heat exchange, heat exchanger is widely used in industrial field. Under high temperature and high pressure working condition, the heat exchanger is easy to cause explosion risk due to abnormal combustion of fuel or pressure sudden rise, and there is lack of pressure dynamic regulation mechanism in the prior art, so it is difficult to quickly restore system stability after pressure relief, resulting in frequent equipment downtime maintenance, and an explosion -proof device with functions of rapid explosion relief, directional energy release and pressure self -balancing is urgently needed, and therefore we propose heat exchanger explosion -proof device. UTILITY MODEL CONTENT

[0003] (I) the technical problem solved

[0004] In view of the deficiencies of the prior art, the utility model provides heat exchanger explosion -proof device, overcomes the deficiencies of prior art, and the design is reasonable, the structure is compact, and the problems raised in the background art are solved.

[0005] (II) technical scheme

[0006] In order to realize the above object, the utility model is realized by the following technical scheme:

[0007] Heat exchanger explosion -proof device, including fire bucket, combustion engine, conveying pipeline and smoke outlet, the fire bucket is connected with combustion engine and conveying pipeline, the third level guide pipe section of conveying pipeline is equipped with explosion -proof pipe, the explosion -proof pipe includes door shaft and sealing plate, the sealing plate is hinged in one direction through door shaft, when the pressure in the system exceeds the threshold value, the sealing plate is opened under the impact of air pressure and pressure relief.

[0008] Preferably, the fire bucket is also provided with a pressure stabilizing device, including a pressure stabilizing tube, a pressure stabilizing plunger and a threaded plunger, the pressure stabilizing tube is coaxially provided with a pressure stabilizing hole, a control hole and a connecting hole, the pressure stabilizing plunger is arranged in the pressure stabilizing hole and has a bellows structure, and the threaded plunger is threadedly connected in the control hole, and the end portion thereof is elastically abutted with the pressure stabilizing plunger through a spring.

[0009] Preferably, the sealing plate of the explosion -proof pipe is made of stainless steel, and the torsion threshold value of the door shaft is matched with the rated pressure of the system.

[0010] Preferably, the bellows of the pressure stabilizing plunger is annularly provided with a hole, the pressure stabilizing plunger is axially provided with a release hole, and the through hole of the threaded plunger is communicated with the release hole.

[0011] Preferably, the threaded plunger is provided with an arc surface at the end of the nut, the spring is elastically connected with the arc surface through a ball head, and the stroke of the threaded plunger can be adjusted through a hexagonal bolt.

[0012] Preferably, the voltage regulator tube has a vent hole and a spring hole radially formed, with the vent hole extending to the voltage regulator hole and the spring hole extending to the control hole.

[0013] Preferably, the conveying pipeline adopts a three-stage variable diameter diversion design and is equipped with a high-temperature resistant exhaust port at the end.

[0014] (III) Beneficial Effects

[0015] This utility model provides an explosion-proof device for heat exchangers. It has the following beneficial effects:

[0016] 1. By incorporating an explosion-proof pressure relief mechanism and a pressure stabilizing device, the combined design of explosion-proof and pressure stabilizing improves the stability of heat exchanger operation.

[0017] 2. When abnormal combustion or explosion occurs inside the combustion chamber, the explosion-proof pipe opening can open in time to release high-pressure gas and energy, prevent the combustion chamber from rupturing due to overpressure, and protect the safety of equipment and personnel.

[0018] 3. Directing the release of explosive energy through the explosion-proof opening can prevent the explosion shock wave and debris from flying everywhere, limiting the destructive range of the explosion to a certain area and reducing damage to surrounding facilities and the environment.

[0019] 4. When the high pressure warning is triggered inside the fire barrel, the explosion-proof port will automatically impact the sealing plate to open the door hinge and release pressure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the explosion-proof pipe of this utility model;

[0022] Figure 3 This is a schematic diagram of the voltage regulator tube of this utility model;

[0023] Figure 4 This utility model Figure 3 A schematic diagram of AA;

[0024] Figure 5 This is a schematic diagram of the pressure-stabilizing plunger and threaded plunger of this utility model;

[0025] Figure 6 This utility model Figure 5 A three-dimensional schematic diagram.

[0026] In the diagram: 1. Fire barrel; 11. Conveying pipe; 12. Burner; 13. Smoke outlet; 2. Explosion-proof pipe; 21. Door hinge; 22. Sealing plate; 3. Pressure stabilizing pipe; 31. Pressure stabilizing hole; 32. Control hole; 33. Connection hole; 34. Exhaust hole; 35. Spring hole; 4. Pressure stabilizing plunger; 41. Release hole; 5. Threaded plunger; 51. Arc-shaped surface; 52. Ball head; 53. Spring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] See attached document Figures 1-2 The heat exchanger explosion-proof device mainly includes a fire barrel 1, a burner 12, a delivery pipeline 11, and an explosion-proof pressure relief mechanism. The fire barrel 1 is fixedly installed via a steel frame, and its front end is connected to the burner 12 and the delivery pipeline 11 via dual-channel flanges. The burner 12 integrates an ignition electrode and a Venturi mixer, enabling premixing and ignition of liquid fuel and air. The mixed fuel gas is injected into the fire barrel 1 through the burner outlet for complete combustion.

[0029] The conveying pipeline 11 adopts a multi-section flow guiding design, with three stages of variable diameter guide pipes arranged in series along the pipeline. A high-temperature resistant exhaust port 13 is installed at the end. For abnormal combustion conditions, an explosion-proof pipe 2 is installed at the third stage guide pipe section of the conveying pipeline 11, sealed with a 304 stainless steel sealing plate 22. The sealing plate 22 is unidirectionally hinged via a high-precision hinge 21. When the system internal pressure exceeds a specified value, the air pressure impact force overcomes the torque threshold of the hinge 21, pushing the sealing plate 22 to open the pressure relief angle, achieving rapid explosion relief protection.

[0030] See attached document Figures 3-6 To further promote the stable operation of the heat exchanger, a pressure stabilizing device is also provided on 1. The pressure stabilizing device includes a pressure stabilizing tube 3, a pressure stabilizing plunger 4, and a threaded plunger 5. A coaxial pressure stabilizing hole 31 and a control hole 32 are axially opened in the pressure stabilizing tube 3, and a connecting hole 33 is connected between the pressure stabilizing hole 31 and the control hole 32. The pressure stabilizing hole 31, the control hole 32, and the connecting hole 33 are coaxially arranged. An exhaust hole 34 and a spring hole 35 are radially opened on the pressure stabilizing tube 3. The exhaust hole 34 extends into the pressure stabilizing hole 31, and the spring hole 35 extends into the control hole 32.

[0031] A pressure-stabilizing plunger 4 with an axial through-hole structure is installed in the pressure-stabilizing hole 31, and a threaded plunger 5 with an axial through-hole structure is installed in the control hole 32. The pressure-stabilizing plunger 4 and the threaded plunger 5 correspond to each other. A sealing gasket is also provided on the end side of the pressure-stabilizing plunger 4 away from the threaded plunger 5. One end of the pressure-stabilizing plunger 4 with a sealing ring is in the pressure-stabilizing hole 31, and the other end is in the connecting hole 33. The middle section of the pressure-stabilizing plunger 4 has a bellows structure, which allows the pressure-stabilizing plunger 4 to extend and retract within the pressure-stabilizing hole 31. A hole is also provided around the bellows of the pressure-stabilizing plunger 4. When the pressure in 1 increases, the bellows of the pressure-stabilizing plunger 4 extends, and gas can be released from the bellows. Gas overflows from the hole. When the pressure-stabilizing plunger 4 contracts under the resistance of the threaded plunger 5, the bellows folds completely block the hole, and the gas will only be discharged from the release hole 41 and the through hole of the threaded plunger 5. The release hole 41 is axially provided on the pressure-stabilizing plunger 4. The threaded plunger 5 is threadedly connected to the control hole 32. The nut end ring of the threaded plunger 5 is provided with multiple arc-shaped surfaces 51. A spring 53 is provided in the spring hole 35. The spring 53 and the arc-shaped surfaces 51 are elastically connected by a ball head 52. A hexagonal structure is provided on the end face of the arc-shaped surface 51. The stroke of the threaded plunger 5 can be adjusted by a hexagonal bolt.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heat exchanger explosion-proof device, comprising a fire barrel (1), a burner (12), a conveying pipe (11), and a flue gas outlet (13), characterized in that: The fire barrel (1) is connected to a burner (12) and a conveying pipe (11). An explosion-proof pipe (2) is provided at the third-stage guide pipe section of the conveying pipe (11). The explosion-proof pipe (2) includes a door hinge (21) and a sealing plate (22). The sealing plate (22) is unidirectionally hinged by the door hinge (21). When the internal pressure of the system exceeds the threshold, the sealing plate (22) is opened to release pressure due to air pressure impact.

2. The heat exchanger explosion-proof device as described in claim 1, characterized in that: The fire bucket (1) is also equipped with a pressure stabilizing device, including a pressure stabilizing tube (3), a pressure stabilizing plunger (4) and a threaded plunger (5). The pressure stabilizing tube (3) has a pressure stabilizing hole (31), a control hole (32) and a connecting hole (33) coaxially opened inside. The pressure stabilizing plunger (4) is located inside the pressure stabilizing hole (31) and has a bellows structure. The threaded plunger (5) is threadedly connected to the control hole (32), and its end is elastically abutted against the pressure stabilizing plunger (4) by a spring (53).

3. The heat exchanger explosion-proof device as described in claim 1, characterized in that: The sealing plate (22) of the explosion-proof pipe (2) is made of 304 stainless steel, and the torque threshold of the door hinge (21) matches the rated pressure of the system.

4. The heat exchanger explosion-proof device as described in claim 2, characterized in that: The bellows of the pressure stabilizing plunger (4) is provided with a hole, and a release hole (41) is opened axially on the pressure stabilizing plunger (4). The through hole of the threaded plunger (5) is connected to the release hole (41).

5. The heat exchanger explosion-proof device as described in claim 2, characterized in that: The threaded plunger (5) has an arc-shaped surface (51) at the nut end. The spring (53) is elastically connected to the arc-shaped surface (51) through the ball head (52), and the stroke of the threaded plunger (5) can be adjusted by the hexagonal bolt.

6. The heat exchanger explosion-proof device as described in claim 2, characterized in that: The voltage regulator tube (3) has a radially opened vent hole (34) and a spring hole (35), with the vent hole (34) extending to the voltage regulator hole (31) and the spring hole (35) extending to the control hole (32).

7. The heat exchanger explosion-proof device as described in claim 1, characterized in that: The conveying pipeline (11) adopts a three-stage variable diameter flow guide design and is equipped with a high-temperature resistant flue gas outlet (13) at the end.

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