PTC heating rod convenient to replace

Abstract

The utility model relates to the technical field of PTC (Positive Temperature Coefficient) heating rods, in particular to a PTC heating rod convenient to replace, which comprises a sleeve shell, a heating sheet main body is inserted into the inner side of the sleeve shell, and a connector lug used for connection is rotationally mounted on one side, close to the open end of the sleeve shell, of the heating sheet main body. A hexagonal ring seat used for plugging is installed on the inner side of the opening end of the periphery of the sleeve shell in a screwed mode, and a wire holder used for connection is assembled on the inner side of the hexagonal ring seat. When the internal structure of the PTC heating rod is maintained, the hexagonal ring seat and the threads on the inner side of the sleeve shell can be mutually screwed and separated only by rotating the hexagonal ring seat on the inner side of the sleeve shell, and then the heating sheet main body on the inner side of the sleeve shell can be pulled out, so that the heating sheet main body is convenient to disassemble, maintain or replace; and meanwhile, a connector lug at the top of the heating sheet main body can rotate, so that the connector lug can be conveniently connected with a connector base on the inner side of the hexagonal ring base through a wire, the heating sheet main body can smoothly operate, and heating work is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of PTC heating rods, in particular to a PTC heating rod which is convenient to replace. Background Art

[0002] Heating rods can be divided into two categories according to their principles and structures. One is electronic, which uses thermistors to detect and control the temperature, and the other is bimetallic mechanical temperature control heating rods. PTC is a positive temperature coefficient, which generally refers to semiconductor materials or components with a large positive temperature coefficient. Patent No. CN201721395031.7 announced a PTC heating rod. The PTC heating plate has a constant temperature characteristic and will not heat up infinitely. It is safe and reliable. Even if the temperature control fails or the power is forgotten to be turned off, it can ensure that the heated diesel is within a safe temperature range and can be used reliably. It also heats quickly and achieves heating without open flames. However, since the external aluminum shell and the heating plate of the PTC heating rod are pressed together by pressure during manufacturing, it is inconvenient to disassemble the two. When the heating plate fails, the heating rod can only be replaced, which is not convenient to operate. To this end, we propose a PTC heating rod that is easy to replace. Utility Model Content

[0003] In view of the problems in the prior art, the utility model provides a PTC heating rod which is easy to replace.

[0004] The technical solution adopted by the utility model to solve the technical problem is a PTC heating rod that is easy to replace, comprising a casing, a heating plate body is plugged into the inner side of the casing, a terminal head for connection is rotatably installed on the side of the heating plate body close to the opening end of the casing, and a hexagonal ring seat for blocking is screwed and installed on the inner side of the outer peripheral opening end of the casing, a terminal seat for connection is installed on the inner side of the hexagonal ring seat, and a wire for conduction is installed between the terminal seat and the terminal head;

[0005] The outer peripheral surface of the hexagonal ring seat is assembled with an end cover for sealing by screws, and a rubber ring for leak prevention is bonded to one side of the end cover close to the hexagonal ring seat, and a rubber pad for protection is bonded to one side of the hexagonal ring seat that fits the wiring seat.

[0006] By adopting the above technical solution, when maintaining the internal structure of the PTC heating rod, it is only necessary to rotate the hexagonal ring seat on the inner side of the casing to separate the hexagonal ring seat from the threads on the inner side of the casing, and then the heating plate body on the inner side of the casing can be pulled out, which is convenient for disassembly, maintenance or replacement. At the same time, the wiring head on the top of the heating plate body can rotate by itself, which is convenient for mutual connection with the wiring seat on the inner side of the hexagonal ring seat through the wire, so that the heating plate body can operate smoothly and heating work is convenient;

[0007] After the main body of the heating plate is installed in the casing, the end cover can be conveniently installed on the surface of the hexagonal ring seat by means of screws, and the preset holes on the surface of the end cover facilitate mutual fitting and connection with the terminal posts on its surface. At the same time, with the cooperation of the rubber ring and the rubber pad, the tightness of the hexagonal ring seat can be improved, so that the hexagonal ring seat can operate more stably.

[0008] Specifically, the outer circumferential surface of the hexagonal ring seat and the outer circumferential surface of the sleeve shell are both provided with screw holes for connection, and the inner sides of the screw holes are threadedly installed with hexagonal screws for fastening.

[0009] By adopting the above technical solution, after the hexagonal ring seat is threadedly installed in the casing, the hexagonal screw can be conveniently threadedly installed in the screw hole on the outside of the casing, and can be threadedly connected with the screw holes on the outer periphery of the hexagonal ring seat, thereby improving the stability of the hexagonal ring seat.

[0010] Specifically, a ring groove for connection is formed on the inner peripheral surface of the sleeve, and a ring body which fits and connects with the ring groove is integrally constructed at one end of the hexagonal ring seat close to the ring groove.

[0011] By adopting the above technical solution, the ring body and the ring groove are fitted and connected with each other, which is convenient for improving the tightness of the hexagonal ring seat and the sleeve after being screwed together, and is convenient for reducing leakage.

[0012] Specifically, a rubber ring for preventing leakage is bonded to the inner bottom surface of the ring groove.

[0013] By adopting the above technical solution, the rubber ring is convenient for improving the tightness of the connection between the ring body and the ring groove, thereby further improving the tightness of the threaded connection between the hexagonal ring seat and the sleeve shell.

[0014] Specifically, a gasket located between the hexagonal ring seat and the heating plate body is inserted into the inner side of the shell, and an asbestos pad for protection is bonded to one end of the gasket close to the heating plate body.

[0015] By adopting the above technical solution, the gasket facilitates auxiliary support between the hexagonal ring seat and the heating plate body, and the asbestos pad facilitates protection, thereby reducing the friction between the gasket and the heating plate body and causing scratches and damage.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The technical solution of the present application, through the design of the heating plate body, hexagonal ring seat, terminal head, terminal seat and wire, when maintaining the internal structure of the PTC heating rod, it is only necessary to rotate the hexagonal ring seat on the inner side of the shell to separate the threaded engagement between the hexagonal ring seat and the thread inside the shell, and then the heating plate body inside the shell can be pulled out, which is convenient for disassembly, maintenance or replacement. At the same time, the terminal head on the top of the heating plate body can rotate by itself, which is convenient for interconnection with the terminal seat inside the hexagonal ring seat through the wire, so that the heating plate body can operate smoothly and heating work is convenient.

[0018] 2. The technical solution of the present application adopts the design of the end cover, rubber ring and rubber pad. After the main body of the heating plate is installed in the casing, the end cover can be conveniently installed on the surface of the hexagonal ring seat by means of screws. The preset holes on the surface of the end cover facilitate the mutual fitting connection with the terminal posts on its surface. At the same time, with the cooperation of the rubber ring and the rubber pad, the tightness of the hexagonal ring seat can be improved, so that the hexagonal ring seat can operate more stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is an axonometric drawing of the utility model;

[0021] Figure 2 It is a schematic cross-sectional view of the inner structure of the casing of the utility model;

[0022] Figure 3 This is a structural schematic diagram of a part A of the inner side mechanism of the casing of the utility model;

[0023] In the figure: 1. shell; 2. heating plate body; 3. hexagonal ring seat; 4. terminal head; 5. terminal seat; 6. wire; 7. rubber pad; 8. ring groove; 9. ring body; 10. rubber ring; 11. end cover; 12. rubber ring; 13. washer; 14. asbestos pad; 15. screw hole; 16. hexagonal screw. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] See also Figure 1-3The embodiment of the utility model provides a technical solution: a PTC heating rod that is easy to replace, including a shell 1, a heating plate body 2 is inserted into the inner side of the shell 1, a terminal head 4 for connection is rotatably installed on the side of the heating plate body 2 close to the open end of the shell 1, and a hexagonal ring seat 3 for sealing is screwed on the inner side of the outer peripheral open end of the shell 1, a terminal block 5 for connection is installed on the inner side of the hexagonal ring seat 3, and a conductive wire 6 is installed between the terminal block 5 and the terminal head 4; an end cover 11 for sealing is installed on the outer peripheral surface of the hexagonal ring seat 3 by screws, and a rubber ring 12 for leak prevention is bonded to one side of the end cover 11 close to the hexagonal ring seat 3, and a rubber pad 7 for protection is bonded to one side of the hexagonal ring seat 3 that is in contact with the terminal block 5.

[0026] When in use, when maintaining the internal structure of the PTC heating rod, it is only necessary to rotate the hexagonal ring seat 3 inside the casing 1 to separate the hexagonal ring seat 3 from the threads inside the casing 1, and then the heating plate body 2 inside the casing 1 can be pulled out, which is convenient for disassembly, maintenance or replacement. At the same time, the wiring head 4 on the top of the heating plate body 2 can rotate, which is convenient for mutual connection with the wiring seat 5 inside the hexagonal ring seat 3 through the wire 6, so that the heating plate body 2 can operate smoothly and convenient for heating work;

[0027] After the heating plate body 2 is installed in the casing 1, the end cover 11 is conveniently installed on the surface of the hexagonal ring seat 3 by means of screws, and the preset holes on the surface of the end cover 11 are convenient for mutual fit and connection with the terminal posts on its surface. At the same time, with the cooperation of the rubber ring 12 and the rubber pad 7, the tightness of the hexagonal ring seat 3 is conveniently improved, so that the hexagonal ring seat 3 can operate more stably.

[0028] like Figure 1 and Figure 2 As shown, the outer circumferential surfaces of the hexagonal ring seat 3 and the outer circumferential surfaces of the casing 1 are both provided with screw holes 15 for connection, and the inner sides of the screw holes 15 are threadedly installed with hexagonal screws 16 for fastening.

[0029] When in use, after the hexagonal ring seat 3 is screwed into the casing 1, it is convenient to screw the hexagonal screw 16 into the screw hole 15 on the outside of the casing 1, and it can be screwed into connection with the screw holes 15 on the outer periphery of the hexagonal ring seat 3, so as to improve the stability of the hexagonal ring seat 3.

[0030] like Figure 2 As shown, a ring groove 8 for connection is provided on the inner circumferential surface of the sleeve shell 1, and a ring body 9 which fits and connects with the ring groove 8 is integrally constructed at one end of the hexagonal ring seat 3 close to the ring groove 8.

[0031] When in use, the ring body 9 and the ring groove 8 are fitted and connected with each other, so as to improve the tightness of the hexagonal ring seat 3 and the casing 1 after being screwed together, and to reduce leakage.

[0032] like Figure 2 As shown, a rubber ring 10 for preventing leakage is bonded to the inner bottom surface of the ring groove 8 .

[0033] When in use, the rubber ring 10 is convenient for improving the tightness of the connection between the ring body 9 and the ring groove 8, thereby further improving the tightness of the threaded connection between the hexagonal ring seat 3 and the sleeve shell 1.

[0034] like Figure 2 As shown, a gasket 13 located between the hexagonal ring seat 3 and the heating plate body 2 is inserted into the inner side of the casing 1, and an asbestos pad 14 for protection is bonded to one end of the gasket 13 close to the heating plate body 2.

[0035] When in use, the washer 13 facilitates auxiliary support between the hexagonal ring seat 3 and the heating plate body 2, while the asbestos pad 14 facilitates protection, thereby reducing the friction between the washer 13 and the heating plate body 2 and reducing the possibility of scratches and damage.

[0036] The working principle and use process of the utility model are as follows: when in use, first install the corresponding structural components in a suitable position. When maintaining the internal structure of the PTC heating rod, it is only necessary to rotate the hexagonal ring seat 3 on the inner side of the casing 1 to make the hexagonal ring seat 3 and the threads on the inner side of the casing 1 screwed together and separated, and then the heating plate body 2 on the inner side of the casing 1 can be pulled out, which is convenient for disassembly, maintenance or replacement. At the same time, the terminal head 4 on the top of the heating plate body 2 can rotate, which is convenient for mutual connection with the terminal seat 5 on the inner side of the hexagonal ring seat 3 through the wire 6, so that the heating plate body 2 can operate smoothly and facilitate heating. After the heating plate body 2 is installed in the casing 1, it is convenient to use screws to install the end cover 11 on the surface of the hexagonal ring seat 3, and the preset holes on the surface of the end cover 11 are convenient for mutual fit and connection with the terminal posts on its surface. At the same time, with the cooperation of the rubber ring 12 and the rubber pad 7, it is convenient to improve the tightness of the hexagonal ring seat 3, so that the hexagonal ring seat 3 can operate more stably.

[0037] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A PTC heating rod that is easy to replace, characterized in that: The invention comprises a casing (1), wherein a heating plate body (2) is inserted into the inner side of the casing (1), a terminal head (4) for connection is rotatably mounted on the side of the heating plate body (2) close to the opening end of the casing (1), and a hexagonal ring seat (3) for sealing is screwedly mounted on the inner side of the outer peripheral opening end of the casing (1), a terminal seat (5) for connection is installed inside the hexagonal ring seat (3), and a conductive wire (6) for conducting electricity is installed between the terminal seat (5) and the terminal head (4); The outer peripheral surface of the hexagonal ring seat (3) is assembled with an end cover (11) for sealing by means of screws, and a rubber ring (12) for leak prevention is bonded to a side of the end cover (11) close to the hexagonal ring seat (3), and a rubber pad (7) for protection is bonded to a side of the hexagonal ring seat (3) that is in contact with the wiring seat (5).

2. The easily replaceable PTC heating rod according to claim 1, characterized in that: The outer peripheral surface of the hexagonal ring seat (3) and the outer peripheral surface of the casing (1) are both provided with screw holes (15) for connection, and the inner side of the screw hole (15) is threadedly installed with a hexagonal screw (16) for fastening.

3. The easily replaceable PTC heating rod according to claim 1, characterized in that: The inner peripheral surface of the sleeve (1) is provided with a ring groove (8) for connection, and the end of the hexagonal ring seat (3) close to the ring groove (8) is integrally constructed with a ring body (9) that fits and connects with the ring groove (8).

4. The easily replaceable PTC heating rod according to claim 3, characterized in that: A leak-proof rubber ring (10) is bonded to the inner bottom surface of the ring groove (8).

5. The easily replaceable PTC heating rod according to claim 1, characterized in that: A gasket (13) located between the hexagonal ring seat (3) and the heating plate body (2) is inserted into the inner side of the casing (1), and an asbestos pad (14) for protection is bonded to one end of the gasket (13) close to the heating plate body (2).

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