Molten salt electric heater terminal cooling structure

Abstract

The utility model discloses a fused salt electric heater terminal cooling structure, comprising a sleeve, one end of the sleeve is arranged on a tube plate flange in a penetrating manner, an electric heating tube is arranged in the sleeve, a ceramic sheath is arranged on a junction box bottom plate, one end of the ceramic sheath is connected with the sleeve through a sleeve fastener, and the other end of the ceramic sheath is connected with the electric heating tube. According to the fused salt electric heater, the ceramic sheath is arranged on the junction box bottom plate, insulation isolation of high-temperature fused salt and the wiring cavity side is achieved, when the fused salt electric heater operates, the ceramic sheath is arranged on the junction box bottom plate, and therefore the high-temperature fused salt electric heater can be used for heating the fused salt. High-temperature fused salt in all interlayer gaps completes natural heat dissipation in an external ventilation heat dissipation area, it is guaranteed that the working temperature of the wiring cavity side on the left side of the junction box bottom plate is controlled to be 60 DEG C or below, the working temperature of the wiring cavity side is reduced, stable operation of equipment is guaranteed, the service life of cables and the equipment is prolonged, and the equipment protection grade is not affected; and the field use requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of molten salt electric heater, specifically relates to a molten salt electric heater wiring terminal cooling structure. BACKGROUND

[0002] The molten salt electric heater is a kind of heating device using special tubular electric heating element combined with flange cluster to form a heat supply whole with pressure vessel, using heated nitrate salt to melt nitrate salt as heating medium, to complete energy storage in the form of electric heating molten salt, realize the high-efficiency conversion of electric energy to heat energy.

[0003] The heating tube and the sleeve outside it in the existing molten salt electric heater extend to cable wiring area, and the sleeve and the bottom plate of junction box are welded and fixed, but due to the superfluidity of molten salt, hot molten salt can fill the interlayer gap between sleeve and heating tube, and the superthermal conductivity of molten salt can rapidly transfer the high temperature of 550~580 DEG C of molten salt itself to cable wiring area, even if it penetrates through external ventilation and heat dissipation area, the heat can still make cable wiring area reach above 100 DEG C, which seriously affects the service life of cable, and cannot guarantee the normal use of molten salt electric heater, for this purpose, a molten salt electric heater wiring terminal cooling structure is provided. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a molten salt electric heater wiring terminal cooling structure to solve the problems in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a molten salt electric heater wiring terminal cooling structure, comprising,

[0006] Sleeve, one end of the sleeve is arranged on the pipe plate flange in penetration, and electric heating tube is arranged in the sleeve;

[0007] Ceramic sheath, the ceramic sheath is arranged on the junction box bottom plate, one end of the ceramic sheath is connected with the sleeve through sleeve fastener, the other end of the ceramic sheath is provided with lead-out electrode through electric heating tube fastener, and sealing silica gel is arranged between the ceramic sheath and the junction box bottom plate.

[0008] Preferably, one end of the sleeve, the electric heating tube and the sleeve fastener are welded and fixed towards the ceramic sheath by welding mode.

[0009] Preferably, one end of the sleeve and the pipe plate flange are welded and fixed by welding mode.

[0010] Preferably, a threaded slot is formed on the ceramic sheath towards one end of the sleeve, and the outer periphery of the sleeve fastener is provided with external threads matched with the threaded slot, and the ceramic sheath and the sleeve fastener are threadedly connected through the threaded slot and the external threads.

[0011] Preferably, an external ventilation and heat dissipation area is formed between the tube plate flange and the junction box bottom plate.

[0012] Preferably, the lead-out electrode is connected with the electric heating tube.

[0013] Preferably, the outer side of the lead-out electrode is provided with external threads, and the electric heating tube fastener is threadedly connected with the lead-out electrode through the external threads, so that the electric heating tube fastener is screwed and fixed on the ceramic sheath.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] The utility model discloses a ceramic sheath is equipped on the junction box bottom plate, and the ceramic sheath is connected with the sleeve and the electric heating tube through the sleeve fastener, and the sleeve, the electric heating tube and the sleeve fastener are welded and fixed towards one end of the ceramic sheath, realize the insulation isolation of high temperature molten salt and junction cavity side, when the molten salt electric heater is running, the high temperature molten salt (550 ~ 580 DEG C) of molten salt side will flow and fill the interlayer gap between the sleeve and the electric heating tube, and the heat of high temperature molten salt will be transferred to the top end of the sleeve and the electric heating tube, through the external ventilation and heat dissipation area, so that the high temperature molten salt in all interlayer gaps is completed natural heat dissipation in the external ventilation and heat dissipation area, and the heat will not be transferred to the junction cavity side of the junction box bottom plate left side, guarantee the working temperature control of the junction cavity side of the junction box bottom plate left side is below 60 DEG C, reduce the working temperature of the junction cavity side, guarantee equipment steady operation, increase cable and equipment service life, and do not affect equipment protection level, satisfy the on -the -spot use demand. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the sectional structure schematic diagram of the utility model.

[0017] In the drawing: 1, sleeve;2, tube plate flange;3, electric heating tube;4, ceramic sheath;5, junction box bottom plate;6, sleeve fastener;7, electric heating tube fastener;8, lead-out electrode;9, sealing silica gel. DETAILED DESCRIPTION

[0018] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0019] Please refer to Figure 1 The molten salt electric heater wiring end cooling structure provided by the present application comprises,

[0020] The sleeve pipe 1 is arranged through the pipe plate flange 2 at one end, and the one end of the sleeve pipe 1 and the pipe plate flange 2 are welded and fixed by welding, and the electric heating pipe 3 is arranged in the sleeve pipe 1;

[0021] The ceramic sheath 4 is arranged on the junction box bottom plate 5, one end of the ceramic sheath 4 is connected with the sleeve pipe 1 through the sleeve pipe fastener 6, the sleeve pipe 1, the electric heating pipe 3 and the sleeve pipe fastener 6 are welded and fixed at one end towards the ceramic sheath 4 by welding, a threaded slot is formed at one end of the ceramic sheath 4 towards the sleeve pipe 1, the outer periphery of the sleeve pipe fastener 6 is provided with an outer thread matched with the threaded slot, the ceramic sheath 4 and the sleeve pipe fastener 6 are threadedly connected through the threaded slot and the outer thread, the other end of the ceramic sheath 4 is provided with the lead-out electrode 8 through the electric heating pipe fastener 7, the lead-out electrode 8 is connected with the electric heating pipe 3, the outer side of the lead-out electrode 8 is provided with an outer thread, the electric heating pipe fastener 7 is threadedly connected with the lead-out electrode 8 through the outer thread, so that the electric heating pipe fastener 7 is screwed and fixed on the ceramic sheath 4, and the sealing silica gel 9 is arranged between the ceramic sheath 4 and the junction box bottom plate 5, so as to meet the sealing requirement of the wiring cavity side, realize dustproof and waterproof, and make the protection level reach IP65;

[0022] The pipe plate flange 2 and the junction box bottom plate 5 form an external ventilation and heat dissipation area.

[0023] The utility model discloses a ceramic sheath 4 is equipped on junction box bottom plate 5, and the ceramic sheath 4 is connected with sleeve 1 and electric heating tube 3 through sleeve fastener 6, and the sleeve 1, electric heating tube 3 and the one end of sleeve fastener 6 towards ceramic sheath 4 are welded fixedly through welding mode, realize high temperature molten salt and the insulation isolation of junction cavity side, when the operation of molten salt electric heater, the high temperature molten salt (550~580 DEG C) of molten salt side, will flow and fill the interlayer gap between sleeve 1 and electric heating tube 3, and the heat of high temperature molten salt will be transferred to the top end of sleeve 1 and electric heating tube 3, through the external ventilation heat dissipation area, so that the high temperature molten salt in all interlayer gap completes natural heat dissipation in external ventilation heat dissipation area, and the heat will not be transferred to the junction cavity side of junction box bottom plate 5 left side, guarantees the working temperature control in 60 DEG C below of junction cavity side of junction box bottom plate 5 left side, reduces the working temperature of junction cavity side, guarantees the stable operation of equipment, increases the service life of cable and equipment, and does not affect equipment protection level, satisfies the on -the -spot use demand.

[0024] In summary, the use method of the molten salt electric heater junction end cooling structure provided by the embodiment is as follows: when the molten salt electric heater is operated, the high-temperature molten salt (550-580 DEG C) on the molten salt side will flow and fill the interlayer gap between the sleeve 1 and the electric heating tube 3, and the heat carried by the high-temperature molten salt will be transferred to the top end of the sleeve 1 and the electric heating tube 3. Through the external ventilation heat dissipation area, the high-temperature molten salt in all interlayer gaps completes natural heat dissipation in the external ventilation heat dissipation area, and the heat will not be transferred to the junction cavity side of the junction box bottom plate 5 left side. The working temperature of the junction cavity side of the junction box bottom plate 5 left side is controlled below 60 DEG C.

[0025] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A molten salt electric heater terminal end cooling structure, characterized by, The utility model relates to a kind of electric heating pipe of ceramic sheath, including, Sleeve (1), one end of the sleeve (1) is arranged on pipe plate flange (2), and electric heating tube (3) is arranged in the sleeve (1); Ceramic sheath (4) is arranged on terminal box bottom plate (5), one end of the ceramic sheath (4) is connected with the sleeve (1) by sleeve fastener (6), the other end of the ceramic sheath (4) is provided with lead-out electrode (8) by electric heating tube fastener (7), and sealing silica gel (9) is arranged between the ceramic sheath (4) and the terminal box bottom plate (5).

2. A fused salt electric heater terminal end cooling structure according to claim 1 wherein: The sleeve (1), the electric heating tube (3) and the sleeve fastener (6) are welded to one end of the ceramic sheath (4) by welding.

3. A molten salt electric heater terminal end cooling structure according to claim 1, wherein: One end of the sleeve (1) and the pipe plate flange (2) are welded by welding.

4. A molten salt electric heater terminal end cooling structure according to claim 1, wherein: Threaded slot is opened to one end of the ceramic sheath (4) towards the sleeve (1), and the outer periphery of the sleeve fastener (6) is provided with external thread matched with the threaded slot, and the ceramic sheath (4) and the sleeve fastener (6) are threadedly connected by the threaded slot and the external thread.

5. A fused salt electric heater terminal end cooling structure in accordance with claim 1 characterized by: The pipe plate flange (2) and the terminal box bottom plate (5) form an external ventilation and heat dissipation area.

6. A fused salt electric heater terminal end cooling structure according to claim 1 wherein: The lead-out electrode (8) is connected with the electric heating tube (3).

7. A fused salt electric heater terminal end cooling structure in accordance with claim 1 characterized by: The outer side of the lead-out electrode (8) is provided with external thread, and the electric heating tube fastener (7) is threadedly connected with the lead-out electrode (8) by the external thread, so that the electric heating tube fastener (7) is screwed and fixed on the ceramic sheath (4).

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