Novel pipeline heater

Abstract

The utility model discloses a novel pipeline heater which comprises a heating pipe and a shell arranged outside the heating pipe, and a heating element is arranged on the circumferential outer wall of the heating pipe. The shell comprises an upper shell and a lower shell, the edges of the upper shell and the lower shell are mutually buckled in a sealed mode, and the two ends of the upper shell and the two ends of the lower shell are each provided with a semicircular groove face attached to the circumferential outer wall of the heating pipe in a sealed mode; a supporting plate and a temperature signal conversion circuit board are arranged in the upper shell, a plurality of supporting protrusions are arranged on the upper surface of the supporting plate, and the temperature signal conversion circuit board is fixed to the supporting protrusions. The top end of the upper shell is hermetically connected with a detachable top end cover plate; according to the utility model, the structure is simple, the heating pipe and the temperature signal conversion circuit board are accurately positioned, the temperature control structure can be assembled according to diversified requirements of users, the assembly is flexible and convenient, the structure is compact, and the integration level is high; the sealing protection performance is good; the maintenance is convenient, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of heaters, in particular to a novel pipeline heater. Background Technique

[0002] The pipeline heater is such that in operation, a low-temperature fluid medium enters its input port through a pipeline under pressure, and along the internal heat exchange flow path of the electric heating container, following the path designed by the principle of fluid thermodynamics, it takes away the high-temperature heat energy generated during the operation of the heating element, so that the temperature of the medium to be heated rises; the patent publication number CN220871148U discloses a high-efficiency energy-saving energy storage chiller heater structure, including a housing assembly formed by buckling an upper housing and a lower housing; a thick-film heater is arranged inside the housing assembly, and two temperature controllers are arranged outside the housing to achieve a double-layer temperature control function; the heater in this solution only assembles a mechanical temperature control switch structure, and this temperature control switch can directly connect to a contactor for switch signal feedback. However, now many industrial devices are developing towards intelligence, automation, and digitization, so circuit boards are often integrated inside the devices, and temperature sensors are usually arranged on the heating elements of the heaters. For example, thick-film heaters usually have thermistor sensors (NTC). Therefore, it is necessary for the temperature sensor to feedback a low-voltage electrical signal or a real-time temperature value to the circuit board, and finally the control board executes the action; and because the temperature control switch is located outside the housing, there are problems such as the function requirement of only using a mechanical temperature control switch cannot meet the real-time feedback of the temperature of the heating pipe, there is only one temperature control structure, which cannot meet the diverse needs of users for the temperature control structure; and the sealing and protection performance is poor. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects, and provide a novel pipeline heater, which can realize the function of feedback temperature control switch signal or real-time temperature value, can be equipped with a temperature control structure according to the diverse needs of users, is flexible and convenient to assemble, the installation and use space required by the temperature control structure is small, the structure is compact, and the integration degree is high; the heating pipe and the temperature signal conversion circuit board are accurately positioned, the sealing and protection performance is good, and the maintenance is convenient, which can effectively solve the problems in the background technique.

[0004] To achieve the above object, the utility model provides the following technical solution: A novel pipeline heater, including a heating pipe and a housing arranged outside it, a heating element is arranged on the circumferential outer wall of the heating pipe, the heating element is located inside the housing, and both ends of the heating pipe penetrate to the outside of the housing; the housing includes an upper housing and a lower housing whose edges are hermetically buckled, and semi-circular groove surfaces that are hermetically attached to the circumferential outer wall of the heating pipe are arranged at both ends of the upper housing and the lower housing; a support plate and a temperature signal conversion circuit board are arranged inside the upper housing, multiple support protrusions are arranged on the upper surface of the support plate, and the temperature signal conversion circuit board is fixed on the support protrusions; the top end of the upper housing is an open structure, and a detachable top cover plate is hermetically connected to the open part at the top end of the upper housing.

[0005] Further, on both side ends of the circumferential outer wall of the heating pipe along its radial direction, a grounding stud and a positioning post are respectively provided. A first positioning hole adapted thereto is formed on the support plate at a position corresponding to the grounding stud, and a second positioning hole adapted thereto is formed on the support plate at a position corresponding to the positioning post.

[0006] Further, the support plate is provided with two temperature control switch mounting holes for mounting a temperature control switch, and connection holes for connecting and fixing the temperature control switch are formed on the support plate outside the temperature control switch mounting holes.

[0007] Further, a positioning retaining ring adapted to the outer edge contour shape of the temperature control switch is further provided on the support plate around the temperature control switch mounting holes, and the positioning retaining ring is used for positioning the temperature control switch; the support protrusions are all located on the circumferential outer edge of one of the positioning retaining rings.

[0008] Further, two vertically arranged positioning plates are provided on the upper surface of the support plate along its width direction. The two ends of the positioning plates are in contact with the two side walls of the upper shell in the length direction. A positioning cavity for positioning the temperature signal conversion circuit board is formed between the positioning plates and the two side walls of the upper shell in the length direction, and the support protrusions are all located in this positioning cavity.

[0009] Further, the support plate and the upper shell are of an integral structure; and the length of the support plate is less than the length of the inner cavity of the upper shell.

[0010] Further, water inlet and outlet connectors are fixedly provided at both ends of the heating pipe.

[0011] Further, the temperature signal conversion circuit board is fastened to the support protrusions by screws or a clamping structure.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: for this new type of pipeline heater, the support plate is provided with temperature control switch mounting holes for mounting a temperature control switch and support protrusions for connecting and fixing a temperature signal conversion circuit board. The temperature control structure of the pipeline heater can be changed according to the diverse needs of users, the assembly is flexible and convenient, and the installation and use space required for the temperature control structure is small; the structure is simple, the positioning of the heating pipe and the temperature signal conversion circuit board is accurate, the temperature signal conversion circuit board and the temperature control switch are both located inside the shell, and the sealing and protection performance is good; the top cover plate is detachable, and the maintenance is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is an exploded schematic diagram of the present utility model;

[0015] Figure 3Schematic diagram of the internal structure of the upper shell in the first embodiment of the present utility model;

[0016] Figure 4 Partial enlarged view of the upper shell in the first embodiment of the present utility model;

[0017] Figure 5 Schematic diagram of the internal structure of the upper shell in the second embodiment of the present utility model;

[0018] Figure 6 Schematic diagram of the internal structure of the upper shell when installing the temperature signal conversion circuit board and a temperature control switch in the second embodiment of the present utility model;

[0019] Figure 7 Top view of the upper shell when installing two temperature control switches in the second embodiment of the present utility model.

[0020] In the figure: 1. Heating tube; 11. Heating element; 12. Water inlet and outlet joint; 13. Grounding stud; 14. Positioning post; 2. Upper shell; 21. Support plate; 22. Temperature control switch mounting hole; 23. Connection hole; 24. Support protrusion; 241. Fixing hole; 25. Positioning plate; 26. Positioning retaining ring; 27. First positioning hole; 28. Second positioning hole; 3. Lower shell; 4. Top cover plate; 5. Temperature control switch; 6. Temperature signal conversion circuit board. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Embodiment 1

[0022] Please refer to Figures 1-4 , the present utility model provides a technical solution: a new type of pipeline heater, including a heating tube 1 and a shell provided outside thereof. A heating element 11 is provided on the circumferential outer wall of the heating tube 1. In this embodiment, the heating element 11 is a thick film heating element. The heating element 11 is located inside the shell, and both ends of the heating tube 1 penetrate to the outside of the shell; water inlet and outlet joints 12 are fixedly provided at both ends of the heating tube 1; on both side ends of the circumferential outer wall of the heating tube 1, a grounding stud 13 and a positioning post 14 are respectively provided along the radial direction;

[0023] The housing includes an upper housing 2 and a lower housing 3 with their edges hermetically buckled together. Semi-circular groove surfaces that are hermetically fitted to the circumferential outer wall of the heating tube 1 are provided at both ends of the upper housing 2 and the lower housing 3. The top end of the upper housing 2 is an open structure, and a detachable top cover plate 4 is hermetically connected to the open end at the top of the upper housing 2. A wire plug for sealing the power cord is provided on one side wall of the upper housing 2. Sealing members are provided on the buckling surface between the upper housing 2 and the lower housing 3, on the fitting surfaces of the semi-circular groove surfaces of the upper housing 2 and the lower housing 3 with the heating tube 1, and also on the buckling surface between the upper housing 2 and the top cover plate 4.

[0024] A support plate 21 is provided inside the upper housing 2. A plurality of support protrusions 24 are provided on the upper surface of the support plate 21. Fixing holes 241 for connecting and fixing a temperature signal conversion circuit board 6 are provided on the top surfaces of the support protrusions 24. The temperature signal conversion circuit board 6 is fixed on the support protrusions 24 by self-tapping screws passing through its mounting holes and the fixing holes 241. In this embodiment, the temperature signal conversion circuit board 6 can also be fastened to the support protrusions 24 through a clamping structure.

[0025] A first positioning hole 27 adapted to the grounding stud 13 is provided on the support plate 21 at a position corresponding to the grounding stud 13, and a second positioning hole 28 adapted to the positioning post 14 is provided on the support plate 21 at a position corresponding to the positioning post 14. The positioning of the heating tube 1 and the upper housing 2 is achieved through the positioning cooperation between the grounding stud 13 and the first positioning hole 27 and the positioning cooperation between the positioning post 14 and the second positioning hole 28.

[0026] Two vertically arranged positioning plates 25 are provided on the upper surface of the support plate 21 along its width direction. The two ends of the positioning plates 25 are in contact with the two side walls in the length direction of the upper housing 2. A positioning cavity for positioning the temperature signal conversion circuit board 6 is formed between the positioning plates 25 and the two side walls in the length direction of the upper housing 2. The size of the positioning cavity is adapted to the size of the temperature signal conversion circuit board 6, and the support protrusions 24 are all located within this positioning cavity.

[0027] When assembling the pipeline heater: Nest the heating tube 1 in the semi-circular groove surface of the lower housing 3, buckle the upper housing 2 and the lower housing 3 together, and insert the grounding stud 13 and the positioning post 14 on the heating tube 1 into the first positioning hole 27 and the second positioning hole 28 on the support plate 21 respectively. Fix the upper housing 2 and the lower housing 3 together by screws. Then install the temperature signal conversion circuit board 6 in the positioning cavity on the support plate 21. Connect the NTC provided on the heating element 11 to the temperature signal conversion circuit board 6, and electrically connect the power cord to the power connection terminal of the heating element 11. Finally, fix the top cover plate 4 and the upper housing 2 together.

[0028] Further, the support plate 21 and the upper housing 2 are of an integral structure; and the length of the support plate 21 is less than the length of the inner cavity of the upper housing 2, which is convenient for the maintenance and wiring of the heating tube 1.

[0029] In the novel pipeline heater disclosed in this embodiment, the NTC on the heating element 11 collects the real-time temperature signal of the heating tube 1, and feeds back the collected signal to the temperature signal conversion circuit board 6. After being converted and processed by the temperature signal conversion circuit board 6, the real-time temperature value is output, realizing the function of real-time feedback of the temperature of the heating tube 1; the top cover plate 4 is detachable, which is convenient for the maintenance of the pipeline heater; the structure of the pipeline heater is simple, the heating tube 1 and the temperature signal conversion circuit board 6 are accurately positioned, the assembly is flexible and convenient, and the temperature signal conversion circuit board 6 is located inside the housing, with good sealing and protection performance. Embodiment Two

[0030] Please refer to Figures 1-2 and Figures 5-7 This embodiment is relative to Embodiment One: Two temperature control switch mounting holes 22 for mounting the temperature control switch 5 are provided on the support plate 21, and connection holes 23 for connecting and fixing the temperature control switch 5 are provided on the support plate 21 outside the temperature control switch mounting holes 22; the temperature control switch 5 can be fixedly connected to the support plate 21 through self-tapping screws passing through its mounting hole and the connection hole 23; a positioning retaining ring 26 adapted to the outer contour shape of the temperature control switch 5 is further provided on the periphery of the temperature control switch mounting holes 22 on the support plate 21, and the temperature control switch 5 can be sleeved in the positioning retaining ring 26, and the temperature control switch 5 is positioned by the positioning retaining ring 26, and the connection holes 23 are all located within the corresponding positioning retaining ring 26; the support protrusions 24 are all located on the circumferential outer edge of one of the positioning retaining rings 26;

[0031] When assembling the temperature control element structure of the pipeline heater: If the pipeline heater needs to use one temperature control switch 5 and one temperature signal conversion circuit board 6, the temperature signal conversion circuit board 6 is installed in the positioning cavity on the support plate 21, and then one temperature control switch 5 is installed in the temperature control switch mounting hole 22 on one side of the temperature signal conversion circuit board 6; the NTC provided on the heating element 11 and the temperature control switch 5 are connected to the temperature signal conversion circuit board 6; the real-time temperature value and the signal of the temperature control switch 5 are output after being converted and processed by the temperature signal conversion circuit board 6; when the temperature of the heating tube 1 is too high, it can be controlled and protected through the temperature control switch 5;

[0032] If the pipeline heater needs to use the temperature control structure of two temperature control switches 5, the two temperature control switches 5 are fixed in the two temperature control switch mounting holes 22 on the support plate 21 through self-tapping screws, and the temperature control switches 5 are positioned by the positioning retaining ring 26; and for the two temperature control switches 5 used, one is a temperature control switch 5 that can be automatically reset, and the other is a temperature control switch 5 that cannot be reset, realizing double-layer temperature control;

[0033] The novel pipeline heater disclosed in this embodiment: Two temperature control switches 5 are fixed in two temperature control switch mounting holes 22 on the support plate 21 through self-tapping screws to achieve a double-layer temperature control structure; it can also be assembled into another temperature control structure combining one temperature control switch 5 and one temperature signal conversion circuit board 6; the temperature control structure of the pipeline heater can be changed according to the diverse needs of users, the assembly is flexible and convenient, and the installation and use space required for the temperature control structure is small.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel pipe heater, comprising a heating pipe and a shell provided outside the heating pipe, characterized in that: A heating element is provided on the circumferential outer wall of the heating tube, the heating element is located in the shell, and both ends of the heating tube extend to the outside of the shell; the shell includes an upper shell and a lower shell whose edges are sealed and buckled with each other, and both ends of the upper shell and the lower shell are provided with semicircular groove surfaces that are sealed and fitted with the circumferential outer wall of the heating tube; a support plate and a temperature signal conversion circuit board are provided in the upper shell, and a plurality of support protrusions are provided on the upper surface of the support plate, and the temperature signal conversion circuit board is fixed on the support protrusions; the top of the upper shell is an open structure, and a detachable top cover plate is sealed and connected to the open top of the upper shell.

2. A novel pipeline heater according to claim 1, characterized in that: The two side ends of the circumferential outer wall of the heating tube are respectively provided with grounding studs and positioning columns along its radial direction, and the support plate is provided with a first positioning hole matched with it at the position corresponding to the grounding stud, and the support plate is provided with a second positioning hole matched with it at the position corresponding to the positioning column.

3. A novel pipeline heater according to claim 1, characterized in that: The support plate is provided with two temperature-controlled switch mounting holes for mounting the temperature-controlled switch, and the support plate is provided with connection holes for connecting and fixing the temperature-controlled switch at the outer sides of the temperature-controlled switch mounting holes.

4. A novel pipeline heater according to claim 3, characterized in that: The support plate is also provided with a positioning retaining ring adapted to the outer edge contour of the temperature control switch at the periphery of the temperature control switch installation hole, and the positioning retaining ring is used to position the temperature control switch; the supporting protrusions are all located at the circumferential outer edge of one of the positioning retaining rings.

5. The novel pipeline heater according to claim 1 is characterized in that: The upper surface of the support plate is provided with two vertically arranged positioning plates along its width direction, and the two ends of the positioning plates are in contact with the two side walls in the length direction of the upper shell. A positioning cavity that can be used to position the temperature signal conversion circuit board is formed between the positioning plates and the two side walls in the length direction of the upper shell, and the supporting protrusions are all located in the positioning cavity.

6. A novel pipeline heater according to claim 1, characterized in that: The support plate and the upper shell are an integrated structure; and the length of the support plate is smaller than the length of the inner cavity of the upper shell.

7. The novel pipeline heater according to claim 1 is characterized in that: Both ends of the heating pipe are fixedly provided with water inlet and outlet joints.

8. The novel pipeline heater according to claim 1 is characterized in that: The temperature signal conversion circuit board is fastened on the supporting protrusion by means of screws or a clamping structure.

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