Online heater

Abstract

The utility model provides an on-line heater, comprising a housing extending along an axial direction and comprising an accommodating cavity; the cover body assembly is arranged at one end of the shell, and a liquid inlet, a liquid outlet, a lead wire port and a protective switch port are formed in the cover body assembly; a liquid inlet connector is arranged on the liquid inlet, and a liquid outlet connector is arranged on the liquid outlet; one end of the liquid inlet pipe is fixedly connected with the liquid inlet joint; the heating assembly comprises a supporting assembly and at least one heating wire; and one end of the protection switch is fixedly arranged on the protection switch opening, and the other end of the protection switch is provided with a detection piece (51). According to the online heater, the protection switch is additionally arranged, the detection radar is arranged at the bottom of the protection switch, whether the liquid level in the containing cavity is at the upper end of the heating wire or not can be detected, dry burning of the heating wire can be avoided through the structure, and the safety performance of the online heater is improved.

Description

Technical Field

[0001] The utility model belongs to the field of liquid heaters, in particular to an online heater. Background Art

[0002] In the fields of photovoltaics, semiconductors, etc., it is often necessary to heat liquids. Existing heaters may dry burn locally during heating, resulting in a waste of resources and potential safety hazards. Summary of the invention

[0003] In order to solve at least one technical problem in the prior art, the embodiment of the utility model provides an online heater with high safety. In order to achieve the above technical objectives, the technical solution adopted by the embodiment of the utility model is:

[0004] The utility model embodiment provides an online heater, comprising:

[0005] A shell extending in the axial direction, wherein the shell comprises a containing cavity;

[0006] A cover assembly is arranged at one end of the shell, and is provided with a liquid inlet, a liquid outlet, a lead wire port, and a protective switch port; a liquid inlet joint is arranged on the liquid inlet, and a liquid outlet joint is arranged on the liquid outlet;

[0007] A liquid inlet pipe extending axially and disposed in the accommodating cavity, one end of the liquid inlet pipe being fixedly connected to the liquid inlet connector;

[0008] A heating assembly is arranged in the accommodating cavity, the heating assembly comprises a supporting assembly and at least one heating wire, any of the heating wires is arranged in a spiral shape and fixedly arranged on the supporting assembly, and connecting leads are arranged at both ends of any of the heating wires, the connecting leads pass through the lead opening and are fixedly connected to the cover assembly, and the heating wire and / or the connecting leads are covered with insulating material;

[0009] The protection switch extends axially and is arranged in the accommodating cavity. One end of the protection switch is fixedly arranged on the protection switch opening. The other end of the protection switch is provided with a detection member for detecting liquid.

[0010] Furthermore, the height of the detection member of the protection switch is set between one end of the heating wire close to the cover assembly and the cover assembly.

[0011] Furthermore, the cover assembly also includes a temperature sensing line port, the online heater also includes a PT100 temperature sensing line, the PT100 temperature sensing line is arranged in the accommodating cavity, and one end of the PT100 temperature sensing line is fixedly connected to the temperature sensing line port.

[0012] Furthermore, the support assembly comprises:

[0013] A fixed sleeve, disposed at one end of the liquid inlet pipe away from the cover assembly and fixedly connected to the liquid inlet pipe;

[0014] At least two partitions are arranged at intervals along the axial direction and sleeved on the liquid inlet pipe, any of the partitions is provided with a plurality of through holes, the positions of the through holes on any two adjacent partitions correspond to each other, and the through holes are for the heating wire to pass through;

[0015] The spacing sleeve is sleeved with the liquid inlet pipe and is arranged between any two adjacent partitions.

[0016] Furthermore, the cover assembly comprises:

[0017] A first fixing member extends axially and is fixedly connected to one end of the housing.

[0018] A second fixing member is sleeved on the first fixing member and fixedly connected to the first fixing member, an end of the second fixing member facing away from the housing extends inwardly and a gap is provided between the end of the second fixing member facing away from the housing,

[0019] A cover body, wherein the outer wall of the cover body is provided with a convex portion, the convex portion extends along the circumference of the cover body and is arranged in the interval, and the cover body is provided with the liquid inlet, the liquid outlet, the lead wire port, the protective switch port, and the temperature sensing wire port.

[0020] Furthermore, the outer wall of the first fixing member is provided with an external thread;

[0021] The inner wall of the second fixing member is provided with an internal thread and is threadably connected to the first fixing member.

[0022] Furthermore, an outer ring is provided at one end of the first fixing member close to the housing, and a step is formed between the outer ring and the first fixing member;

[0023] The step is connected to the outer wall of the shell by welding.

[0024] Furthermore, a sealing groove is provided on the first fixing member, and a sealing ring is provided in the sealing groove.

[0025] Furthermore, a sewage outlet is provided at one end of the shell body away from the cover body assembly.

[0026] Furthermore, the insulating material used to cover the heating wire and the connecting lead is PFA material;

[0027] And / or, the shell, the cover assembly, the inner tube, and the support assembly are made of PTFE material.

[0028] The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

[0029] The embodiment of the utility model adds a protective switch, and a detection radar is provided at the bottom of the protective switch, which can detect whether the liquid level in the accommodating chamber is above the upper end of the heating wire. When the detection radar detects liquid, the heating wire can heat the liquid in the accommodating chamber. When the detection radar does not detect liquid, the heating component stops heating, thereby avoiding dry burning of the heating wire and improving the safety performance of the online heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the shell of the online heater in the embodiment of the utility model.

[0031] Figure 2 It is a schematic diagram of the structure of the heating component in the online heater in the embodiment of the utility model.

[0032] Figure 3 It is a cross-sectional view of a cover assembly in an in-line heater in an embodiment of the utility model.

[0033] Figure 4 It is a cross-sectional view of the first fixing member in the structural schematic diagram in the embodiment of the utility model.

[0034] Figure 5 It is a cross-sectional view of the cover body in the structural schematic diagram of the embodiment of the utility model.

[0035] Figure 6 It is a top view of the cover body in the structural schematic diagram of the embodiment of the utility model. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0037] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] The utility model embodiment provides an online heater, comprising:

[0041] A housing 1 extending in the axial direction, the housing 1 comprising a containing cavity 1a;

[0042] The cover assembly 2 is provided at one end of the housing 1, and is provided with a liquid inlet 2a, a liquid outlet 2b, a lead wire port 2c, and a protection switch port 2d; the liquid inlet 2a is provided with a liquid inlet joint 21, and the liquid outlet 2b is provided with a liquid outlet joint 22;

[0043] A liquid inlet pipe 3 extending in the axial direction and disposed in the accommodating cavity 1a, one end of the liquid inlet pipe 3 being fixedly connected to the liquid inlet connector 21;

[0044] A heating component 4 is arranged in the accommodating cavity 1a, and the heating component 4 includes a supporting component 41 and at least one heating wire 42. Any of the heating wires 42 is arranged in a spiral shape and fixedly arranged on the supporting component 41. Both ends of any of the heating wires 42 are provided with connecting leads 421, and the connecting leads 421 pass through the lead opening 2c and are fixedly connected to the cover body component 2. The heating wire 42 and / or the connecting lead 421 are covered with insulating material.

[0045] The protection switch 5 extends axially and is disposed in the accommodating cavity 1a. One end of the protection switch 5 is fixedly disposed on the protection switch opening 2d. The other end of the protection switch 5 is provided with a detection member 51 for detecting liquid.

[0046] like Figure 1 , Figure 2 and Figure 6As shown, the housing 1 is arranged from top to bottom, and the cover assembly 2 is arranged at the upper end, and the interior of the housing 1 is the accommodating chamber 1a. The liquid inlet pipe 3 is arranged in the accommodating chamber 1a from top to bottom, and the upper end of the liquid inlet pipe 3 is fixedly connected to the liquid inlet joint 21. Liquid is introduced into the accommodating chamber 1a through the liquid inlet pipe 3, and the liquid gradually rises from the bottom of the housing 1 and flows out of the accommodating chamber 1a from the liquid outlet joint 22. The liquid may be water.

[0047] The supporting assembly 41 in the heating assembly 4 can fix and support the heating wire 42. The connecting lead 421 of the heating wire 42 passes through the lead port 2c and is connected to the power supply. The number of the heating wires 42 is not limited and can be determined according to the actual number of electrical phases. The heating wire 42 is arranged in a spiral shape, which can increase the contact area between the heating wire 42 and the liquid, thereby improving the heating efficiency.

[0048] The protection switch 5 is added to the housing 1. Since the detection member 51 is provided at the lower end of the protection switch 5, the detection member 51 can detect whether the liquid level reaches a preset height. When the detection member 51 can detect the liquid, the heating component 4 works, and the heating wire 42 can heat the liquid in the accommodating chamber 1a; when the detection member 51 does not detect the liquid, the heating component 4 stops working to avoid dry burning of the heating wire 42, thereby improving the safety performance of the online heater. The upper end of the protection switch 5 can be threadedly connected to the protection switch port 2d. The detection member 51 can be a detection radar.

[0049] It should be noted that the fixed connection method described in the present application is not limited. For example, the upper end of the liquid inlet pipe 3 can be threadedly connected to the liquid inlet joint 21, or the upper end of the liquid inlet pipe 3 can be fixed to the liquid inlet joint 21 by a tight fit; the upper end of the protective switch 5 is threadedly connected to the protective switch port 2d, or the upper end of the protective switch 5 can be fixed to the protective switch port 2d by a tight fit; the connecting lead 421 of the heating wire 42 is fixedly connected to the cover body assembly 2, and the connecting lead 421 can be fixed to the cover body assembly 2 by a snap screw.

[0050] Furthermore, the height of the detection member 51 of the protection switch 5 is set between the end of the heating wire 42 close to the cover assembly 2 and the cover assembly 2. This height can avoid partial dry burning of the heating wire 42 and improve the safety performance of the online heater.

[0051] Furthermore, the cover body assembly 2 also includes a temperature sensing line port 2e, and the online heater also includes a PT100 temperature sensing line 6. The PT100 temperature sensing line 6 is arranged in the accommodating cavity 1a, and one end of the PT100 temperature sensing line 6 is fixedly connected to the temperature sensing line port 2e. The PT100 temperature sensing line 6 is used to detect the temperature of the liquid in the accommodating cavity 1a. The number of the PT100 temperature sensing lines 6 is not limited. For example, two PT100 temperature sensing lines 6 can be set in the shell 1.

[0052] The specific configuration of the support assembly 41 in the present application is not limited. In a specific embodiment, the support assembly 41 includes:

[0053] A fixed sleeve 411 is disposed at one end of the liquid inlet pipe 3 away from the cover assembly 2 and is fixedly connected to the liquid inlet pipe 3;

[0054] At least two partitions 412 are arranged at intervals along the axial direction and sleeved on the liquid inlet pipe 3. A plurality of through holes are provided on any of the partitions 412. The positions of the through holes on any two adjacent partitions 412 correspond to each other. The through holes are used for the heating wires 42 to pass through.

[0055] The spacing sleeve 413 is sleeved around the liquid inlet pipe 3 and is disposed between any two adjacent partitions 412 .

[0056] like Figure 2 As shown, the spacing sleeve 413 can separate any two adjacent partitions 412, and the spacing sleeve 413 and the partition 412 can prevent the heating wire 42 in the through hole from being entangled and causing local burning, and the fixed sleeve 411 can fix the partition 412 and the spacing sleeve 413 sleeved on the liquid inlet pipe 3. In this embodiment, the number of the partitions 412 and the spacing sleeves 413 is not limited, and the number of the partitions 412 and the spacing sleeves 413 can be adjusted with the length of the heating wire 42. The position and number of the through holes on the partition 412 are also not limited, and the number of the through holes can be adjusted with the number of the heating wires 42. For example, six through holes can be provided on any of the partitions 412, and the six through holes are arranged at equal intervals along the circumference. This structure can ensure that the heating wires 42 are evenly distributed in the accommodating cavity 1a, thereby improving the uniformity of heating of the online heater.

[0057] In another specific embodiment, the support assembly includes:

[0058] At least two partitions are arranged at intervals along the axial direction, and at least one mounting hole and at least one through hole are provided on any partition. On any two partitions, the positions of the mounting holes correspond one to one, and the positions of the through holes correspond one to one, and the through holes are for the heating wire to pass through;

[0059] At least one support rod extends along the axial direction and is sleeved with the liquid inlet pipe. The support rod passes through the mounting hole and is fixedly connected to the partition. One end of the support rod that is away from the cover assembly is fixedly connected to the liquid inlet pipe. In this embodiment, the support rod extends along the vertical direction, the partitions are arranged on the support rod at intervals, and the partitions are fixedly connected to the support plate. For example, threads can be provided on the support rod, and the mounting holes of the partitions are threaded holes. The partitions can be sleeved and rotated to be placed at different positions on the support rod. This structure can also fix the interval between any two adjacent partitions.

[0060] The specific configuration of the cover assembly 2 described in the present application is also not limited. In a specific embodiment, the cover assembly 2 includes:

[0061] The first fixing member 23 extends axially and is fixedly connected to one end of the housing 1.

[0062] The second fixing member 24 is sleeved with the first fixing member 23 and fixedly connected to the first fixing member 23. The end of the second fixing member 24 away from the housing 1 extends inward and a gap is provided between the end of the first fixing member 23 away from the housing 1.

[0063] The cover body 25 has an outer wall provided with a convex portion 251, the convex portion 251 extends along the circumference of the cover body 25 and is arranged in the interval, and the cover body 25 is provided with the liquid inlet 2a, the liquid outlet 2b, the lead wire port 2c, the protective switch port 2d, and the temperature sensing wire port 2e.

[0064] like Figure 3 , Figure 4 , Figure 5 As shown, the first fixing member 23 is arranged at the upper end of the shell 1. Since the upper end of the second fixing member 24 extends inward, it can form the interval with the upper end of the first fixing member 23 and fix the protrusion 251 of the cover body 25, so that this structure can fix the cover body 25.

[0065] The second fixing member 24 is sleeved and fixedly connected to the first fixing member 23 . In a specific embodiment, the second fixing member 24 is connected to the first fixing member 23 by welding.

[0066] In another specific embodiment, the outer wall of the first fixing member 23 is provided with an external thread;

[0067] The inner wall of the second fixing member 24 is provided with an internal thread and is threadedly connected to the first fixing member 23 .

[0068] It can be understood that the second fixing member 24 and the first fixing member 23 are separately arranged, which is easy to replace and maintain parts, and the threaded connection structural design ensures that the interval between the upper end of the second fixing member 24 and the upper end of the first fixing member 23 is adjustable, so that it can be suitable for the cover body 25 of different models, specifications and structures.

[0069] The first fixing member 23 is fixedly connected to the housing 1. The method of the fixed connection is not limited. In a specific embodiment, Figure 4 As shown, an outer ring 231 is provided at one end of the first fixing member 23 close to the housing 1, and a step is formed between the outer ring 231 and the first fixing member 23;

[0070] The step is welded to the outer wall of the shell 1 , and the step can play a role in quick positioning, which is conducive to quickly placing the first fixing member 23 on the upper end of the shell 1 , and the step facilitates welding the first fixing member 23 and the shell 1 .

[0071] During installation, firstly, the first fixing member 23 is set on the upper end of the shell 1, the outer wall of the shell 1 and the outer ring 231 are welded, and then the cover body 25 is set on the first fixing member 23, and finally the second fixing member 24 is placed on the first fixing member 23 and rotated until the upper end of the second fixing member 24 is tightly fitted with the protrusion 251. The structure is simple and easy to install and disassemble.

[0072] Furthermore, a sealing groove 23 a is provided on the first fixing member 23 , and a sealing ring is provided in the sealing groove 23 a . The sealing groove 23 a and the sealing ring can increase the sealing performance of the cover assembly 2 to prevent the cover assembly 2 from leaking.

[0073] Furthermore, the housing 1 is provided with a sewage outlet 1b at one end away from the cover assembly 2. Figure 1 As shown, the sewage outlet 1b is used to clean the shell 1, and the sewage outlet 1b can be closed by a plug, a cover, a movable sleeve, etc. When the shell 1 needs to be cleaned, the plug, the cover or the movable sleeve is removed to open the sewage outlet 1b.

[0074] Furthermore, the insulating material of the heating wire 42 and the connecting lead 421 is PFA material. The full name of PFA material is polyvinyl fluoride copolymer, which is a special plastic with excellent corrosion resistance.

[0075] And / or, the shell 1, the cover assembly 2, the inner tube, and the support assembly 41 are made of PTFE material. The full name of PTFE material is polytetrafluoroethylene, which has good corrosion resistance and long service life.

[0076] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An online heater, characterized in that: include: A shell (1) extending in an axial direction, the shell (1) comprising a containing cavity (1a); A cover assembly (2) is arranged at one end of the housing (1); the cover assembly (2) is provided with a liquid inlet (2a), a liquid outlet (2b), a lead wire port (2c), and a protective switch port (2d); a liquid inlet joint (21) is arranged on the liquid inlet (2a), and a liquid outlet joint (22) is arranged on the liquid outlet (2b); A liquid inlet pipe (3) extending in the axial direction and arranged in the accommodating cavity (1a), one end of the liquid inlet pipe (3) being fixedly connected to the liquid inlet connector (21); A heating component (4) is arranged in the accommodating cavity (1a), the heating component (4) comprising a supporting component (41) and at least one heating wire (42), any one of the heating wires (42) being arranged in a spiral shape and fixedly arranged on the supporting component (41), and connecting leads (421) being arranged at both ends of any one of the heating wires (42), the connecting leads (421) passing through the lead opening (2c) and being fixedly connected to the cover body component (2), and the heating wire (42) and / or the connecting lead (421) being coated with insulating material; A protection switch (5) extends axially and is disposed in the accommodating cavity (1a); one end of the protection switch (5) is fixedly disposed on the protection switch opening (2d); and the other end of the protection switch (5) is provided with a detection member (51), the detection member (51) being used to detect liquid.

2. The in-line heater according to claim 1, characterized in that: The height of the detection member (51) of the protection switch (5) is arranged between one end of the heating wire (42) close to the cover assembly (2) and the cover assembly (2).

3. The in-line heater according to claim 1, characterized in that: The cover assembly (2) further comprises a temperature sensing line port (2e); The online heater further comprises a PT100 temperature sensing line (6), wherein the PT100 temperature sensing line (6) is arranged in the accommodating cavity (1a), and one end of the PT100 temperature sensing line (6) is fixedly connected to the temperature sensing line port (2e).

4. The in-line heater according to claim 1, characterized in that: The support assembly (41) comprises: A fixed sleeve (411), arranged at an end of the liquid inlet pipe (3) away from the cover assembly (2), and fixedly connected to the liquid inlet pipe (3); At least two partitions (412) are arranged at intervals along the axial direction and sleeved on the liquid inlet pipe (3); any of the partitions (412) is provided with a plurality of through holes; the positions of the through holes on any two adjacent partitions (412) correspond to each other; the through holes are used for the heating wires (42) to pass through; A spacing sleeve (413) is sleeved around the liquid inlet pipe (3) and is disposed between any two adjacent partitions (412).

5. The in-line heater according to claim 3, characterized in that: The cover assembly (2) comprises: A first fixing member (23) extends axially and is fixedly connected to one end of the housing (1). The second fixing member (24) is sleeved with the first fixing member (23) and is fixedly connected to the first fixing member (23); an end of the second fixing member (24) facing away from the shell (1) extends inwardly and a gap is provided between the end of the second fixing member (24) facing away from the shell (1). A cover body (25), wherein the outer wall of the cover body (25) is provided with a convex portion (251), the convex portion (251) extends along the circumference of the cover body (25) and is arranged in the interval, and the cover body (25) is provided with the liquid inlet (2a), the liquid outlet (2b), the lead wire port (2c), the protective switch port (2d), and the temperature sensing wire port (2e).

6. The in-line heater according to claim 5, characterized in that: The outer wall of the first fixing member (23) is provided with an external thread; The inner wall of the second fixing member (24) is provided with an internal thread and is threadedly connected to the first fixing member (23).

7. The in-line heater according to claim 5, characterized in that An outer ring (231) is provided at one end of the first fixing member (23) close to the housing (1), and a step is formed between the outer ring (231) and the first fixing member (23); The step is welded to the outer wall of the shell (1).

8. The in-line heater according to claim 5, characterized in that The first fixing member (23) is also provided with a sealing groove (23a), and a sealing ring is provided in the sealing groove (23a).

9. The in-line heater according to claim 1, characterized in that: An end of the shell body (1) facing away from the cover body assembly (2) is provided with a sewage outlet (1b).

10. The in-line heater according to claim 1, characterized in that: The insulating material used to coat the heating wire (42) and the connecting lead (421) is a PFA material; And / or, the shell (1), the cover assembly (2), the liquid inlet pipe (3), and the support assembly (41) are made of PTFE material.

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