Spiral electric heater

Abstract

The utility model discloses a spiral electric heater, which comprises a container cylinder and a conical spiral pipe arranged in the container cylinder, the conical tip of the conical spiral pipe and the liquid flow direction in the container cylinder are the same, and a conical bulge opposite to the liquid flow direction is arranged on the side wall of the conical spiral pipe. According to the spiral electric heater provided by the utility model, the pipeline can be sectioned in a step shape through the conical spiral pipe and is sequentially contacted with the axially flowing liquid, namely the pipeline can keep the maximum impact contact surface with the liquid in the container barrel in the circumferential arrangement, so that no pipeline is arranged behind a single section of spiral, the choked flow influence of the pipeline on the liquid is reduced, and the service life of the pipeline is prolonged. The heat released by the pipeline can be completely transferred into the liquid, so that the temperature rise difference of the liquid on the two sides in the container cylinder is reduced, and thermal stress damage to the outer wall of the spiral pipeline caused by temperature gradient is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric heater technical field, concretely relates to a spiral electric heater. BACKGROUND

[0002] The spiral heater adopts the pipeline in spiral distribution inside to heat the liquid in the container, has more large heating area, heating is more uniform, simple structure and the like advantages.

[0003] According to the public (announcement) number: CN217685865U, the public (announcement) day: October 28, 2022, a kind of spiral inner body heating pipe's electric heater, including heating body and the heating mode of the spiral heating pipe and straight rod type heating pipe in it in combination.

[0004] In the prior art including the above patent, since the spiral pipe covers larger area in the container, and the container is usually to maintain larger heating contact surface with the spiral pipe, will make the liquid to be heated flow from one side of the container to the other side, and pass through the spiral hollow of the spiral pipe, at the same time, in order to improve the heating efficiency, the flow rate in the container will be reduced to absorb more heat, but since the liquid will slow down when impacting the side wall of the spiral pipe, and the liquid flow rate is more affected towards the end of the container, therefore the liquid behind the liquid flow in the container will be more obviously heated, so that the liquid on both sides of the container is heated differently, and the obvious temperature gradient will cause thermal stress damage to the side wall of the spiral pipe, and the damage occurs in the process of continuously adding and replacing cold liquid in the container, thereby causing greater damage to the pipeline. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a spiral electric heater, to solve the problems generated above.

[0006] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0007] A spiral electric heater, comprising a container cylinder, further comprising a tapered spiral pipe arranged in the container cylinder, the tapered spiral pipe tip and the liquid flow direction in the container cylinder are the same, and the tapered spiral pipe side wall is provided with a tapered convex which is opposite to the liquid flow direction.

[0008] Preferably, the side wall is provided with an outer pipe communicated with the tapered spiral pipe.

[0009] Preferably, the tapered spiral pipe side wall is slidably provided with a sliding sleeve matched with the tapered convex.

[0010] Preferably, an annular sleeve is axially slidably arranged in the container cylinder, and a second elastic member is fixedly installed between the sliding sleeve and the annular sleeve.

[0011] Preferably, a fixed frame fixedly installed in the container barrel and connected with the tapered spiral pipe is further included.

[0012] Preferably, a first elastic member outside the tapered spiral pipe is fixedly installed between the ring sleeve and the fixed frame.

[0013] Preferably, a round convex is arranged at the end of the ring sleeve opposite to the liquid flow direction.

[0014] Preferably, the first elastic member is specifically a spring.

[0015] Preferably, the second elastic member is specifically a tension spring.

[0016] Preferably, a round corner is arranged at the end of the sliding sleeve.

[0017] In the above technical solution, the spiral electric heater provided by the utility model has the following beneficial effects: the tapered spiral pipe can make the pipeline segmented in a ladder shape and sequentially contact the axially flowing liquid, that is, the pipeline can keep the maximum impact contact surface with the liquid in the container barrel in the circumferential arrangement, the rear of the single-section spiral is free of the pipeline, the flow resistance of the liquid caused by the pipeline is reduced, the heat released by the pipeline can be completely transferred to the liquid, the temperature difference between the liquids on both sides of the container barrel is reduced, and the thermal stress damage to the outer wall of the spiral pipeline caused by the temperature gradient is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0019] Figure 1 The heater external container and external pipe assembly schematic diagram provided by the utility model embodiment;

[0020] Figure 2 The tapered spiral pipe and ring sleeve assembly schematic diagram provided by the utility model embodiment;

[0021] Figure 3 The tapered spiral pipe and ring sleeve explosion schematic diagram provided by the utility model embodiment;

[0022] Figure 4 The tapered spiral pipe and ring sleeve partial position front view schematic diagram provided by the utility model embodiment;

[0023] Figure 5 The tapered spiral pipe side view schematic diagram provided by the utility model embodiment.

[0024] Explanation of reference signs:

[0025] 1, container barrel; 2, conical spiral pipe; 21, outer pipe; 22, conical convex; 3, ring sleeve; 30, round convex; 31, first elastic member; 32, fixing frame; 33, second elastic member; 34, sliding sleeve. DETAILED DESCRIPTION

[0026] In order to make the technical personnel in the art better understand the technical scheme of the utility model, the utility model will be further described in detail below with reference to the drawings.

[0027] As shown in Figures 1-5 A spiral electric heater, comprising a container barrel 1, further comprising a conical spiral pipe 2 arranged in the container barrel 1, the conical spiral pipe 2 is the same as the liquid flow direction in the container barrel 1, and the side wall of the conical spiral pipe 2 is provided with a conical convex 22 opposite to the liquid flow direction.

[0028] Specifically, the conical spiral pipe 2 is arranged in a sharp conical shape, and the conical convex 22 is a part of the thickening treatment on the side wall of the pipe, and the integrally formed thickened section is in a sharp conical shape.

[0029] Through the conical conical spiral pipe 2, the pipe can be segmented in a ladder shape and sequentially contact the axially flowing liquid, that is, the pipe can maintain the maximum impact contact surface with the liquid in the container barrel 1 in the circumferential arrangement (as shown in Figure 5 The pipe covering surface), so that there is no pipe behind the single spiral (axial flow on all pipes, as shown in Figure 4 ), so that the pipe reduces the flow resistance influence on the liquid, and when the pipe releases heat, it can be fully transmitted to the liquid, so as to reduce the temperature difference between the two sides of the container barrel 1, reduce the thermal stress damage to the outer wall of the spiral pipe caused by the temperature gradient, and at the same time use the conical convex 22 to guide and separate the liquid, so that the liquid flows quickly to the rear, and the pipe can also store heat and release heat to the conical convex 22, reduce the problem of heat absorption reduction caused by liquid flow, and ensure the heating efficiency of the liquid.

[0030] As a further embodiment of the utility model, the side wall is provided with an outer pipe 21 communicated with the conical spiral pipe 2.

[0031] Two outer pipes 21 are provided for the conical spiral pipe 2 to provide heating inlet and outlet, so that the heating medium flowing in the conical spiral pipe 2 can better transmit heat.

[0032] As a further embodiment of the utility model, the side wall of the conical spiral pipe 2 is slidably provided with a sliding sleeve 34 matched with the conical convex 22.

[0033] The sliding sleeve 34 is used to provide resistance and scraping to the side wall of the conical spiral pipe 2, so as to remove the scale on the outer side wall of the conical spiral pipe 2 and ensure the heat conduction efficiency of the conical spiral pipe 2.

[0034] As a further provided embodiment of the utility model, a ring sleeve 3 is axially slidably arranged in the container barrel 1, and a second elastic member 33 is fixedly arranged between the sliding sleeve 34 and the ring sleeve 3.

[0035] The second elastic member 33 deforms the sliding sleeve 34 when the sliding sleeve 34 is moved along the taper, thereby ensuring smooth sliding between the sliding sleeve 34 and the taper spiral pipe 2.

[0036] As a further provided embodiment of the utility model, a fixed frame 32 is fixedly arranged in the container barrel 1 and connected to the taper spiral pipe 2.

[0037] Specifically, the fixed frame 32 is detachably connected to the container barrel 1 by bolts and nuts, and a metal frame is also used for detachable connection by bolts and nuts on the fixed frame 32, and the connection modes are all prior art and will not be described here.

[0038] The fixed frame 32 provides connection support for the taper spiral pipe 2, so that the taper spiral pipe 2 is more stable when impacted in the container barrel 1.

[0039] As a further provided embodiment of the utility model, a first elastic member 31 is fixedly arranged between the ring sleeve 3 and the fixed frame 32 and located outside the taper spiral pipe 2.

[0040] Specifically, the first elastic member 31 is fixed by welding.

[0041] The liquid flow in the container barrel 1 impacts the ring sleeve 3, which is axially slidably arranged on the inner wall of the container barrel 1, thereby driving the sliding sleeve 34 to slide and adapt to the outer wall of the taper spiral pipe 2. Meanwhile, the ring sleeve 3 also deforms the first elastic member 31 during movement, so that the first elastic member 31 can restore the deformation to reset the ring sleeve 3 when the liquid in the container barrel 1 is replaced.

[0042] As a further provided embodiment of the utility model, a round protrusion 30 is arranged at the end of the ring sleeve 3 and opposite to the direction of the liquid flow.

[0043] Specifically, the round protrusion 30 is a raised corner at the end of the ring sleeve 3.

[0044] The round protrusion 30 reduces the resistance of the liquid flow, reduces the interference with the liquid flow in the container barrel 1, and gradually promotes the axial movement of the ring sleeve 3 with the impact of the liquid.

[0045] As a further provided embodiment of the utility model, the first elastic member 31 is specifically a spring.

[0046] The first elastic member 31 can be located at the back of the ring 3 by the spring, so as to reduce the erosion caused by the direct impact of the liquid on the first elastic member 31, and the service life of the first elastic member 31 is prolonged by the corrosion-resistant coating (the material is prior art, which is not described here) coated on the surface of the first elastic member 31.

[0047] As further provided in another embodiment of the utility model, the second elastic member 33 is specifically a tension spring.

[0048] The second elastic member 33 is made of the tension spring, so that the sliding adaptation of the second elastic member 33 to the sliding sleeve 34 is higher, and the surface of the second elastic member 33 is also coated with corrosion-resistant coating to prolong the service life.

[0049] As further provided in another embodiment of the utility model, the sliding sleeve 34 is provided with a round corner at the end.

[0050] The round corner of the sliding sleeve 34 is located towards the axis of the conical spiral pipe 2, so that the round corner can guide the liquid flowing towards the axis of the conical spiral pipe 2, and the direction of the liquid is reduced.

[0051] Working principle: the conical spiral pipe 2 can make the pipeline segmented in a ladder shape, and sequentially contact the liquid flowing in the axial direction, that is, the pipeline can keep the maximum impact contact surface with the liquid in the container cylinder 1 in the circumferential arrangement, so that the resistance of the pipeline to the liquid is reduced, the heat released by the pipeline can be completely transferred to the liquid, the temperature difference between the liquids on both sides of the container cylinder 1 is reduced, the liquid is guided and separated by the conical convex 22, so that the liquid flows quickly to the rear, and the pipeline can also store heat in the conical convex 22 and release heat, so as to reduce the problem that the heat absorption of the liquid is reduced due to the flow separation.

[0052] The above only describes some exemplary embodiments of the utility model in a descriptive manner, and it is needless to say that the described embodiments can be modified in various ways without departing from the spirit and scope of the utility model for ordinary skilled persons in the art. Therefore, the above drawings and description are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the utility model.

Claims

1. A spiral electric heater comprising a container cylinder (1), characterized in that, The application further comprises a conical spiral pipe (2) arranged in the container cylinder (1), the tip of the conical spiral pipe (2) is in the same direction as the liquid flow direction in the container cylinder (1), and a conical convex (22) is arranged on the side wall of the conical spiral pipe (2) and opposite to the liquid flow direction.

2. A spiral electric heater according to claim 1, wherein An outer pipe (21) is arranged on the side wall and communicates with the conical spiral pipe (2).

3. A spiral electric heater according to claim 1, wherein A sliding sleeve (34) is arranged on the side wall of the conical spiral pipe (2) and matches the conical convex (22).

4. A spiral electric heater according to claim 3, wherein An annular sleeve (3) is arranged in the container cylinder (1) and axially slides, and a second elastic member (33) is fixedly arranged between the sliding sleeve (34) and the annular sleeve (3).

5. A spiral electric heater according to claim 4, wherein A fixing frame (32) is fixedly arranged in the container cylinder (1) and connected with the conical spiral pipe (2).

6. A spiral electric heater according to claim 5, wherein A first elastic member (31) is fixedly arranged between the annular sleeve (3) and the fixing frame (32) and located outside the conical spiral pipe (2).

7. A spiral electric heater according to claim 5, wherein A round convex (30) is arranged on the end of the annular sleeve (3) and opposite to the liquid flow direction.

8. A spiral electric heater according to claim 6, wherein The first elastic member (31) is a spring.

9. A spiral electric heater according to claim 6, wherein The second elastic member (33) is a tension spring.

10. A spiral electric heater according to claim 3, wherein A round corner is arranged on the end of the sliding sleeve (34).

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