Nitrogen explosion-proof electric heater with safety protection device

Abstract

The application belongs to the technical field of heaters, and is especially a nitrogen explosion-proof electric heater with a safety protection device, which comprises a shell, air inlet and outlet pipes are fixed at the top of the shell, flow guide plates are fixed inside the shell at equal intervals, a mounting hole is formed in one side wall of the shell, an electric heating tube is slidingly installed in the mounting hole, and the heating end of the electric heating tube slidingly penetrates the flow guide plate. The connecting block, the first triangular block, the fixing block, the first spring, the shifting block, the second triangular block, the second spring, the top block and the Z-shaped block can be used to conveniently and quickly disassemble and assemble the electric heating tube, so that the electric heating tube can be conveniently replaced or dismounted from the shell for maintenance when the electric heating tube is damaged. The explosion-proof pressure relief assembly arranged on the shell can prevent the air pressure inside the shell from being too high, so as to reduce the risk of explosion caused by too high air pressure.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of heaters, in particular to a nitrogen explosion-proof electric heater with a safety protection device. BACKGROUND

[0002] The nitrogen heater is mainly used for heating nitrogen required to be heated from an initial temperature to a required air temperature, and the highest temperature can reach 850 DEG C. The nitrogen heater has been widely applied to aerospace, weapon industry, chemical industry and many scientific research and production laboratories in colleges and universities. The nitrogen heater is particularly suitable for automatic temperature control and large-flow high-temperature combined systems and accessory tests. At present, the electric heating pipe of the nitrogen heater is usually fixed on the shell through screws. When the electric heating pipe is damaged, it is inconvenient to replace or disassemble the electric heating pipe for maintenance. In addition, the current nitrogen heater does not have an explosion-proof function. When the internal air pressure is too large, the risk of explosion is easy to occur. Therefore, the application provides the nitrogen explosion-proof electric heater with the safety protection device to solve the above problems. SUMMARY

[0003] (I) Technical problems solved

[0004] In view of the defects of the prior art, the application provides the nitrogen explosion-proof electric heater with the safety protection device, which solves the problems in the background art.

[0005] (II) Technical scheme

[0006] In order to achieve the above purpose, the application specifically adopts the following technical scheme:

[0007] The nitrogen explosion-proof electric heater with the safety protection device comprises a shell, air inlet pipelines and air outlet pipelines are respectively fixed at both ends of the top of the shell in a penetrating mode, flow guide plates are fixed at equal intervals in the shell, a mounting hole is formed in one side wall of the shell, an electric heating pipe is slidably installed at the mounting hole, a heating end of the electric heating pipe slidably penetrates the flow guide plate, perforations matched with the electric heating pipe are formed in the surfaces of the flow guide plates, a connecting block is fixedly sleeved at the head of the electric heating pipe, a first triangular block is fixed at the top and the bottom of the connecting block, two fixed blocks are symmetrically fixed on one side wall of the shell, first springs are fixed on the surfaces of the fixed blocks, a push block is fixed at the bottom end of the first spring, a second triangular block matched with an adjacent first triangular block is fixed on the surface of the push block, two second springs are symmetrically fixed on one side wall of the shell, a top block is fixed at one end of the second spring, a Z-shaped block matched with the top block is fixed on the two side walls of the connecting block, and an explosion-proof pressure relief assembly is installed at the top of the shell.

[0008] Further, the interior of the first spring is provided with a first telescopic sleeve, and the two ends of the first telescopic sleeve are fixedly connected with the surface of the adjacent fixed block and the surface of the push block respectively.

[0009] Further, the interior of the second spring is provided with a second telescopic sleeve, and the two ends of the second telescopic sleeve are fixedly connected with the surface of the adjacent top block and the surface of the shell respectively.

[0010] Further, a side wall of the connecting block is fixedly provided with two positioning rods in a symmetrical manner, and a side wall of the shell is provided with two positioning holes which are adapted to the positioning rods.

[0011] Further, the explosion-proof pressure relief assembly comprises a cylinder body fixedly penetrating through the top of the shell, a partition plate is fixedly arranged in the interior of the cylinder body, an air vent is formed in the middle portion of the partition plate, a circular truncated cone plug is closely embedded in the interior of the air vent, a vertical rod is fixedly arranged on the top of the circular truncated cone plug, the top end of the vertical rod slidably penetrates through the top of the cylinder body, a third spring is arranged on the surface of the vertical rod, the two ends of the third spring are fixedly connected with the top of the circular truncated cone plug and the inner wall of the top of the cylinder body respectively, and exhaust holes are formed in the top two side walls of the cylinder body.

[0012] Further, the bottom four corners of the shell are fixedly provided with supporting legs, the bottom of each of the two supporting legs is fixedly provided with a mounting plate, the bottom two ends of each mounting plate are provided with universal self-locking wheels, the middle portion of each mounting plate is screw-connected with a screw rod, the top end of each screw rod is fixedly provided with a knob, the bottom end of each screw rod is rotatably connected with a T-shaped stabilizing plate through a bearing, the top of each T-shaped stabilizing plate is fixedly provided with four guide rods, and the guide rods slidably penetrate through the top of the corresponding mounting plate.

[0013] Further, the bottom of each T-shaped stabilizing plate is provided with an anti-skid pattern, the middle portion of each mounting plate is provided with a threaded hole which is adapted to the screw rod, and the surface of each mounting plate is provided with four guide holes which are adapted to the guide rods in a symmetrical manner.

[0014] (Three) beneficial effects

[0015] Compared with the prior art, the nitrogen explosion-proof electric heater with a safety protection device has the following beneficial effects:

[0016] The electric heating pipe can be conveniently and quickly disassembled, so that the electric heating pipe can be conveniently replaced or disassembled from the shell for maintenance when the electric heating pipe is damaged, and the explosion-proof pressure relief assembly arranged on the shell can prevent the internal pressure of the shell from being too large, thereby reducing the risk of explosion caused by too large pressure. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole body structure schematic diagram of the present application;

[0018] Figure 2 It is the whole body structure schematic diagram of the present application;

[0019] Figure 3 It is the whole body structure schematic diagram of the present application Figure 2 It is the whole body structure schematic diagram of the present application along A-A section;

[0020] Figure 4 It is the whole body structure schematic diagram of the present application along A-A section;

[0021] In the figure: 1, shell; 2, air inlet pipe; 3, air outlet pipe; 4, guide plate; 5, mounting hole; 6, electric heating pipe; 7, perforation; 8, connecting block; 9, No. 1 triangular block; 10, fixed block; 11, first spring; 12, shift block; 13, No. 2 triangular block; 14, second spring; 15, top block; 16, Z-shaped block; 17, anti-explosion pressure relief assembly; 1701, cylinder; 1702, partition; 1703, air hole; 1704, round table block; 1705, vertical rod; 1706, third spring; 1707, exhaust hole; 18, first telescopic sleeve; 19, second telescopic sleeve; 20, positioning rod; 21, positioning hole; 22, support leg; 23, mounting plate; 24, universal self-locking wheel; 25, screw rod; 26, knob; 27, T-shaped stabilizing plate; 28, guide rod. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0023] EMBODIMENT

[0024] As Figure 1 , Figure 2 and Figure 3As shown, one embodiment of the present application proposes a nitrogen explosion-proof electric heater with safety protection device, including the shell 1, the top of the shell 1 is respectively penetrated and fixed with the air inlet pipe 2 and the air outlet pipe 3, the inside of the shell 1 is fixed with the flow guide plate 4 equidistantly staggered, the side wall of the shell 1 is provided with the mounting hole 5, the electric heating tube 6 is slidably installed at the mounting hole 5, the heating end of the electric heating tube 6 is slidably penetrated through the flow guide plate 4, the surface of the flow guide plate 4 is provided with the perforation 7 matched with the electric heating tube 6, the connecting block 8 is fixedly sleeved at the head of the electric heating tube 6, the top and the bottom of the connecting block 8 are fixed with the first triangular block 9, the side wall of the shell 1 is symmetrically fixed with the two fixed blocks 10, the surface of the fixed block 10 is fixed with the first spring 11, the bottom end of the first spring 11 is fixed with the push block 12, the surface of the push block 12 is fixed with the second triangular block 13 matched with the adjacent first triangular block 9, the side wall of the shell 1 is symmetrically fixed with the two second springs 14, one end of the second spring 14 is fixed with the top block 15, the two side walls of the connecting block 8 are fixed with the Z-shaped block 16 matched with the top block 15, the top of the shell 1 is installed with the explosion-proof pressure relief assembly 17, in use, the nitrogen needing to be heated is introduced from the air inlet pipe 2, the electric heating tube 6 can raise the temperature inside the shell 1, the nitrogen can stay in the shell 1 for a long time under the action of the plurality of flow guide plates 4, so that the heating and temperature rising effect can be better, by setting the explosion-proof pressure relief assembly 17, the risk of explosion can be reduced, when the electric heating tube 6 is damaged and needs to be disassembled, the two push blocks 12 can be respectively pushed up and down, the two push blocks 12 can drive the corresponding second triangular blocks 13 to move up and down respectively, so that the corresponding first triangular block 9 is released, at this time, the first spring 11 is in a compressed state, when the second triangular block 13 releases the corresponding first triangular block 9, the top block 15 pushes the corresponding Z-shaped block 16 to move outward under the action of the elastic force of the second spring 14, it should be noted that the second spring 14 in the description is in a compressed state, the two Z-shaped blocks 16 can drive the connecting block 8 to move outward, the connecting block 8 can drive the electric heating tube 6 to move outward, so that the electric heating tube 6 can be disassembled from the shell 1, so that the maintenance is facilitated, how to install the electric heating tube 6 in the shell 1 is not described here.

[0025] As Figure 1 , Figure 2 and Figure 3As shown, in some embodiments, the first spring 11 is internally provided with a first telescopic sleeve 18, the two ends of the first telescopic sleeve 18 are fixedly connected with the surface of the adjacent fixed block 10 and the surface of the push block 12 respectively, so that the push block 12 can be more stable when moving in the vertical direction, the second spring 14 is internally provided with a second telescopic sleeve 19, the two ends of the second telescopic sleeve 19 are fixedly connected with the surface of the adjacent top block 15 and the surface of the shell 1 respectively, so that the top block 15 can be more stable when moving in the horizontal direction, one side wall of the connecting block 8 is symmetrically fixed with two positioning rods 20, one side wall of the shell 1 is symmetrically provided with two positioning holes 21 matched with the positioning rods 20, after the positioning rods 20 are inserted into the corresponding positioning holes 21, the relative rotation between the electric heating pipe 6 and the shell 1 can be prevented, so that the electric heating pipe 6 can be stably installed in the shell 1, and the positioning rods 20 are inserted along the positioning holes 21, so that the first triangular block 9 is aligned with the corresponding second triangular block 13, and the Z-shaped block 16 is aligned with the corresponding top block 15.

[0026] As Figure 1 and Figure 3 shown, in some embodiments, the explosion-proof pressure relief assembly 17 includes a cylinder body 1701 fixed through the top of the shell 1, the inside of the cylinder body 1701 is fixedly provided with a partition plate 1702, the middle part of the partition plate 1702 is provided with a vent hole 1703, the inside of the vent hole 1703 is tightly embedded with a circular truncated cone block 1704, the top of the circular truncated cone block 1704 is fixedly provided with a vertical rod 1705, the top end of the vertical rod 1705 is slidably penetrated through the top of the cylinder body 1701, the surface of the vertical rod 1705 is sleeved with a third spring 1706, the two ends of the third spring 1706 are fixedly connected with the top of the circular truncated cone block 1704 and the inner wall of the top of the cylinder body 1701 respectively, the top end of the cylinder body 1701 is provided with an exhaust hole 1707 on both side walls, when the air pressure inside the shell 1 is too large, the circular truncated cone block 1704 will be lifted up, the vent hole 1703 will be opened, at this time the third spring 1706 will be in a compressed state, so that part of the gas inside the shell 1 will be discharged from the exhaust hole 1707, which can play a role in pressure relief, thereby preventing the occurrence of explosion.

[0027] As Figure 1 , Figure 3 and Figure 4As shown, in some embodiments, the bottom of the shell 1 is fixed with four support legs 22, the bottom of the corresponding two support legs 22 is fixed with an installation plate 23, the bottom of the installation plate 23 is installed with a universal self-locking wheel 24 at both ends, the middle of the installation plate 23 is threadedly connected with a screw rod 25, the top end of the screw rod 25 is fixed with a knob 26, the bottom end of the screw rod 25 is rotatably connected with a T-shaped stabilizing plate 27 through a bearing, the top of the T-shaped stabilizing plate 27 is symmetrically fixed with four guide rods 28, the guide rods 28 slide through the top of the corresponding installation plate 23, the bottom of the T-shaped stabilizing plate 27 is provided with anti-skid lines, which can play a good anti-skid effect, the middle of the installation plate 23 is provided with a threaded hole matched with the screw rod 25, the surface of the installation plate 23 is symmetrically provided with four guide holes matched with the guide rods 28, the universal self-locking wheel 24 is arranged at the bottom of the installation plate 23, which is convenient for moving the equipment, when it is needed to place the equipment stably, the knob 26 can be rotated to drive the screw rod 25 to rotate downward, the screw rod 25 can drive the T-shaped stabilizing plate 27 to move downward, so as to be closely combined with the ground, so that it can be placed stably.

[0028] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for those skilled in the art, it still can be modified, or the equivalent replacement of some technical features recorded in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A nitrogen explosion-proof electric heater with safety protection device, comprising a shell (1), characterized in that: The top of the shell (1) is respectively penetrated by a gas inlet pipe (2) and a gas outlet pipe (3), the inside of the shell (1) is fixed with flow guides (4) staggered at equal intervals, a mounting hole (5) is formed in one side wall of the shell (1), an electric heating pipe (6) is slidably mounted at the mounting hole (5), the heating end of the electric heating pipe (6) is slidably penetrated through the flow guide (4), the surface of the flow guide (4) is formed with perforations (7) adapted to the electric heating pipe (6), a connecting block (8) is fixedly sleeved at the head of the electric heating pipe (6), a first triangular block (9) is fixedly arranged at the top and the bottom of the connecting block (8), two fixed blocks (10) are symmetrically fixed on one side wall of the shell (1), a first spring (11) is fixedly arranged on the surface of each fixed block (10), a push block (12) is fixedly arranged at the bottom end of each first spring (11), a second triangular block (13) adapted to an adjacent first triangular block (9) is fixedly arranged on the surface of each push block (12), two second springs (14) are symmetrically fixed on one side wall of the shell (1), a top block (15) is fixedly arranged at one end of each second spring (14), a Z-shaped block (16) adapted to the top block (15) is fixedly arranged on both side walls of the connecting block (8), an anti-explosion pressure relief assembly (17) is mounted on the top of the shell (1), the anti-explosion pressure relief assembly (17) comprises a cylinder (1701) fixedly penetrated through the top of the shell (1), a partition plate (1702) is fixedly arranged in the cylinder (1701), a vent hole (1703) is formed in the middle of the partition plate (1702), a circular truncated cone block (1704) is tightly embedded in the vent hole (1703), a vertical rod (1705) is fixedly arranged at the top of the circular truncated cone block (1704), the top end of the vertical rod (1705) is slidably penetrated through the top of the cylinder (1701), a third spring (1706) is sleeved on the surface of the vertical rod (1705), the two ends of the third spring (1706) are fixedly connected with the top of the circular truncated cone block (1704) and the inner wall of the top of the cylinder (1701) respectively, and exhaust holes (1707) are formed in the top end of both side walls of the cylinder (1701).

2. The electric heater with safety protection device and nitrogen explosion-proof according to claim 1, characterized in that: First telescopic sleeves (18) are arranged in the first springs (11), and the two ends of each first telescopic sleeve (18) are fixedly connected with the surface of an adjacent fixed block (10) and the surface of a push block (12).

3. The electric heater with safety protection device and nitrogen explosion-proof according to claim 1, characterized in that: Second telescopic sleeves (19) are arranged in the second springs (14), and the two ends of each second telescopic sleeve (19) are fixedly connected with the surface of an adjacent top block (15) and the surface of the shell (1).

4. The electric heater with safety protection device and nitrogen explosion-proof according to Claim 1, characterized in that: Two positioning rods (20) are symmetrically fixed on one side wall of the connecting block (8), and two positioning holes (21) adapted to the positioning rods (20) are symmetrically formed in one side wall of the shell (1).

5. The electric heater with safety protection device and nitrogen explosion-proof according to Claim 1, characterized in that: The bottom of the shell (1) is fixed with support legs (22), the bottom of the corresponding two support legs (22) is fixed with mounting plates (23), the bottom of the mounting plate (23) is equipped with universal self-locking wheels (24), the middle of the mounting plate (23) is screw-connected with screw rods (25), the top of the screw rod (25) is fixed with knobs (26), the bottom of the screw rod (25) is rotatably connected with T-shaped stabilizing plates (27) through bearings, the top of the T-shaped stabilizing plate (27) is fixed with four guide rods (28) in a symmetrical manner, and the guide rod (28) slides through the top of the corresponding mounting plate (23).

6. The electric heater with safety protection device and nitrogen explosion-proof according to claim 5, characterized in that: The bottom of the T-shaped stabilizing plate (27) is provided with anti-skid lines, the middle of the mounting plate (23) is provided with screw holes matched with the screw rods (25), and the surface of the mounting plate (23) is provided with four guide holes matched with the guide rods (28) in a symmetrical manner.

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