CN210453631U

CN210453631U - Heating device

Info

Publication number: CN210453631U
Application number: CN201920966955.0U
Authority: CN
Inventors: 王玲珑; 陈海轮; 夏欣; 詹叶旺; 周旭辉
Original assignee: Ningbo Zhafir Plastics Machinery Co ltd
Current assignee: Ningbo Zhafir Plastics Machinery Co ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-05-05
Anticipated expiration: 2029-06-25

Abstract

The utility model relates to a heater technical field discloses a heater, including: the shell assembly comprises a hollow shell, a heating element is arranged in the shell, and two mounting plates with through holes are arranged on the shell; the two mounting plates are arranged at intervals, the two mounting plates are provided with cover bodies, and the shell, the cover bodies and the two mounting plates form an installation cavity in an enclosing manner; the wiring device and the switching device are arranged in the installation cavity, and the wiring device comprises two conductor blocks; one conductor block is communicated with one end of the heating element, and the other conductor block is communicated with the other end of the heating element; the locking device comprises a support, a first locking block and a second locking block, wherein the first locking block and the second locking block are arranged on the support; the support sets up in the through-hole, has the clearance that is used for locking the electric wire between first locking piece and the second locking piece, and the width in clearance is adjustable. The utility model has the advantages that the heater is convenient to be doubled and the structure is compact; and the wiring is stable, and the phenomenon of sparking caused by the loosening of the electric wire can be prevented.

Description

Heating device

Technical Field

The utility model relates to a heater technical field especially relates to a heater.

Background

There are two common types of heaters used on existing injection molding machines: one of them is a heater with wires, and this type of heater has such problems in practical use: when the length of the cable is too long, the redundant part needs to be cut off, so that the cost of the cable is wasted; when the length of the cable is too short, direct wiring cannot be achieved, and a switching device and the cable need to be added in the middle; this just causes the heater of different cable length, and cable length is difficult to standardize, is unfavorable for the management and control of production.

Another is a junction box heater using pin type terminals, which has the following problems in practical use: the contact area of the needle wire terminal and the terminal hole is small, so that poor contact and local heating of a wiring port are easily caused, and the wiring terminal is burnt; when a plurality of heater power lines are switched, only one wiring terminal is needed, a plurality of lines are connected into one terminal hole, the crimping force is not enough easily, the terminal connection part is loosened, and when the heater is heated, the ignition phenomenon is generated, so that the wiring terminal is burnt.

For example, patent number "201910011440. X" discloses a detachable energy-saving heater for an injection molding machine, which consists of a left half part and a right half part and comprises a frame mechanism, a heating mechanism and a heat preservation mechanism. The left half part and the right half part are equal in size and same in shape and are hinged into a ring-shaped cylinder; the framework mechanism consists of a junction box, a protective outer cover, an end baffle, a protective plate, an inner ring and a mica sheet, wherein the protective outer cover and the inner ring are two coaxial arc-shaped plates, and an outer side closed space is formed by the protective outer cover, the mica sheet and the inner ring; the end baffle, the mica sheet, the guard plate and the protective outer cover form an upper end part closed space and a lower end part closed space, and the heat preservation mechanism consists of an outer side vacuum isolation block and an end part vacuum isolation block and is arranged in the closed spaces. The power line of the heater is difficult to switch, and the power line does not have any locking device, so that when the machine vibrates violently, an insulating layer on the wire is easy to peel off, and a short circuit condition occurs; the contact area between the pin terminal and the terminal hole is small, so that poor contact and local heating occur.

In order to solve the above problems of the existing heater, a heater which is convenient to combine and stable in wiring and can prevent the occurrence of the ignition phenomenon needs to be designed.

Disclosure of Invention

An object of the utility model is to provide an electric heater that doubling is convenient, the wiring is firm to the above-mentioned not enough of prior art.

The utility model provides a technical scheme that its technical problem adopted is, provides a heater, including:

the shell assembly comprises a hollow shell, a heating element is arranged in the shell, and two mounting plates with through holes are arranged on the shell; the two mounting plates are arranged at intervals, the two mounting plates are provided with cover bodies, and the shell, the cover bodies and the two mounting plates form an installation cavity in an enclosing manner;

the wiring device and the switching device are arranged in the installation cavity, and the wiring device comprises two conductor blocks; one conductor block is communicated with one end of the heating element, and the other conductor block is communicated with the other end of the heating element;

the locking device comprises a support, a first locking block and a second locking block, wherein the first locking block and the second locking block are arranged on the support; the support sets up in the through-hole, have the clearance that is used for locking the electric wire between first locking piece and the second locking piece, and the width in clearance is adjustable.

In the above heater, the holder comprises a stopper, a connecting cylinder and two brackets; the two brackets are connected to one side of the limiting piece, the first locking block is positioned above the two brackets, and the second locking block is positioned below the two brackets; the connecting cylinder is connected on the other side of the limiting part, penetrates through the through hole and extends into the installation cavity.

In the above heater, the locking device further comprises a nut and an adjusting screw; the outer wall of the connecting cylinder is provided with threads; the nut is sleeved on the connecting cylinder and is in threaded connection with the connecting cylinder; the mounting plate is provided with an inner side surface and an outer side surface, the limiting piece abuts against the outer side surface of the mounting plate, and the nut abuts against the inner side surface of the mounting plate;

mounting holes are formed in the two ends of the first locking block, the two ends of the second locking block and the two supports; one end of the first locking block and one end of the second locking block are connected to one support through one adjusting screw, and the other end of the first locking block and the other end of the second locking block are connected to the other support through the other adjusting screw.

In the above heater, the middle part of the first lock block has a first arc surface which is concave upwards, and the middle part of the second lock block has a second arc surface which is concave downwards; when the electric wire is locked in the gap, the electric wire is attached to the first cambered surface and the second cambered surface; the locating part is arranged in a hexagon shape.

In the above heater, the wiring device further comprises a first fixing screw, a second fixing screw, a wiring screw, a fixing plate and a ceramic block; the fixing plate is arranged on the shell, and the fixing plate, the ceramic block and the two conductor blocks are all provided with connecting holes;

the ceramic blocks are arranged on the fixing plate, one conductor block is arranged at one end of each ceramic block, the other conductor block is arranged at the other end of each ceramic block, and each conductor block is connected with two wiring screws; the first fixing screw penetrates through the ceramic block from top to bottom to be connected with the fixing plate; and the second fixing screw penetrates through the ceramic block from bottom to top and is connected with the conductor block.

In the above heater, the number of the switching devices is one or more, the switching devices and the wiring devices are arranged side by side, and the structure of the switching devices is the same as that of the wiring devices.

In the above heater, the housing is cylindrical, and the housing has a through groove along an axial direction thereof, and the housing has a circular hole communicating with the through groove.

In the above heater, the housing assembly further comprises a fixing device and a ceramic plate disposed in the heating element; the fixing device comprises a bolt, a fixing nut and two fixing columns with bolt through holes, one fixing column is arranged on the outer wall of the shell and is positioned on the left side of the through groove, and the other fixing column is arranged on the outer wall of the shell and is positioned on the right side of the through groove; the bolt sequentially penetrates through the two fixing columns to be connected with the fixing nut.

In the heater, the two mounting plates are arranged in parallel, the tops of the two mounting plates extend to the side of the mounting cavity to form a plurality of fixed blocks, the bottoms of the two mounting plates extend to opposite directions relative to the mounting cavity to form a connecting plate, and the connecting plate is attached to the outer wall of the shell;

the installation plate is provided with a plurality of L-shaped grounding lugs, and the grounding lugs are all arranged in the installation cavity.

In the heater, the cross section of the cover body is in a [ -shape and comprises two side plates and a cover plate connected between the two side plates; the cover plate is arranged on the fixed block, and the two side plates are arranged on the side surfaces of the two mounting plates.

Compared with the prior art, the utility model discloses following beneficial effect has at least:

in the utility model, the wiring device and the switching device are arranged in the installation cavity side by side, so that the structure is compact, the space is saved, the problem of difficult doubling of the heater can be effectively solved, and the expansibility is stronger; the structure of the wiring device is the same as that of the switching device, wiring is carried out through a wiring screw, and an OT terminal is used for crimping, so that the contact area is large, connection is reliable, and the phenomena of looseness and sparking are avoided; the cover body and the two mounting plates in the shell assembly are arranged in a split mode, so that the shell assembly can adapt to shells with different diameters only by adjusting the distance between the two mounting plates, and the shell assembly is suitable for multiple working conditions; the mounting plate is provided with a locking device for fixing the electric wire, so that after the electric wire is fixed, even if the machine vibrates violently, an insulating layer of the electric wire cannot be scraped, the hidden trouble of short circuit of the electric wire is avoided, and the electric wire is not easy to loosen; and the adjusting screw is screwed to change the width of the gap between the first locking block and the second locking block, so that the locking device can lock wires with different diameters.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 from another perspective;

FIG. 3 is a schematic view of the structure of FIG. 1 with the cover removed;

FIG. 4 is an exploded view of FIG. 1;

FIG. 5 is a schematic view of the assembly of the housing and two mounting plates;

FIG. 6 is a schematic cross-sectional view of the housing, heating element and ceramic wafer;

FIG. 7 is a schematic view of the locking device;

FIG. 8 is an exploded view of FIG. 7;

FIG. 9 is a schematic structural view of a wiring device;

fig. 10 is an exploded view of fig. 9.

In the figure, 1, a housing assembly; 10. a housing; 11. a heating element; 12. a ceramic plate; 13. mounting a plate; 14. a cover body; 15. a mounting cavity; 16. a fixing device; 17. a grounding lug; 100. a through groove; 101. a circular hole; 130. a through hole; 131. an inner side surface; 132. an outer side surface; 133. a fixed block; 134. a connecting plate; 140. a side plate; 141. a cover plate; 160. a bolt; 161. fixing a nut; 162. fixing a column; 1620. passing a hole through a bolt; 2. a wiring device; 20. a conductor block; 21. a first set screw; 22. a second set screw; 23. a binding screw; 24. a fixing plate; 25. a ceramic block; 200. connecting holes; 3. a switching device; 4. a locking device; 40. a support; 41. a first lock block; 42. a second lock block; 43. a nut; 44. an adjusting screw; 400. a limiting member; 401. a connecting cylinder; 402. a support; 410. a first arc surface; 420. a second arc surface; 412. a gap; 4010. a thread; 4120. and (7) installing holes.

Detailed Description

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and the detailed description, but the present invention is not limited to these examples.

As shown in fig. 1 to 6, a heater includes: the connecting device comprises a shell assembly 1, a wiring device 2, a switching device 3 and a locking device 4.

The shell assembly 1 comprises a hollow shell 10, a heating element 11 is arranged in the shell 10, and two mounting plates 13 with through holes 130 are arranged on the shell 10; the two mounting plates 13 are arranged at intervals, the two mounting plates 13 are provided with cover bodies 14, and the shell 10, the cover bodies 14 and the two mounting plates 13 enclose a mounting cavity 15; specifically, the two mounting plates 13 are arranged in parallel, the tops of the two mounting plates 13 extend towards the side of the mounting cavity 15 to form a plurality of fixing blocks 133, the bottoms of the two mounting plates 13 extend towards the opposite direction relative to the mounting cavity 15 to form a connecting plate 134, and the connecting plate 134 is attached to the outer wall of the housing 10; a plurality of L-shaped grounding lugs 17 are arranged on the mounting plate 13, and the grounding lugs 17 are all arranged in the mounting cavity 15. The cover body 14 and the two mounting plates 13 are arranged into a split type, and in the application process, the split type box body can adapt to the shells 10 with different diameters only by adjusting the distance between the two mounting plates 13; because the shell 10 is cylindrical, if the cover body 14 and the mounting plate 13 are arranged into an integral type, the box body formed by enclosing the cover body and the mounting plate can only be suitable for the shell 10 with a fixed radius.

Preferably, the cover 14 has a cross-section of "[", which includes two side plates 140 and a cover plate 141 connected between the two side plates 140; the cover plate 141 is disposed on the fixing block, and the two side plates 140 are disposed at the sides of the two mounting plates 13. The arrangement of the cover body 14 and the mounting plate 13 can effectively prevent dirt from entering the mounting cavity 15 to influence the normal operation of the wiring device 2 and the switching device 3.

Preferably, the housing 10 is cylindrical, and the housing 10 has a through slot 100 along an axial direction thereof, and the housing 10 further has a circular hole 101 communicating with the through slot 100. The arrangement of the round hole 101 can avoid interfering with the bulge on the injection molding machine and can play a certain positioning and rotation preventing function. The housing assembly 1 further comprises a fixing means 16 and a ceramic plate 12 arranged in the heating element 11; the ceramic plate 12 has good thermal conductivity and stable performance, so that the heat generated by the heating element 11 is transferred to the part to be heated, and the service life is long. The fixing device 16 includes a bolt 160, a fixing nut 161 and two fixing posts 162 having bolt passing holes 1620, wherein one fixing post 162 is disposed on the outer wall of the housing 10 and is located at the left side of the through slot 100; another fixing column 162 is disposed on the outer wall of the housing 10 and is located at the right side of the through slot 100; the bolt 160 passes through two fixing posts 162 in turn to be connected with a fixing nut 161. Fixing devices 16 are arranged at two ends of the shell 10, and in the working process, when the shell 10 is sleeved on the cylindrical part to be heated, the heater is fixed through the fixing devices 16.

As shown in fig. 9-10, the wiring lug 2 and the transition fitting 3, both disposed in the mounting cavity 15, the wiring lug 2 includes two conductor blocks 20; wherein one conductor block 20 is in communication with one end of the heating element 11 and the other conductor block 20 is in communication with the other end of the heating element 11; common heating elements 11 are resistance wires, etc. Specifically, the wiring device 2 further includes a first fixing screw 21, a second fixing screw 22, a wiring screw 23, a fixing plate 24, and a ceramic block 25; the fixing plate 24 is arranged on the shell 10, and the fixing plate 24, the ceramic block 25 and the two conductor blocks 20 are all provided with connecting holes 200; the ceramic blocks 25 are arranged on the fixing plate 24, one conductor block 20 is arranged at one end of the ceramic block 25, the other conductor block 20 is arranged at the other end of the ceramic block 25, and two wiring screws 23 are connected to each conductor block 20; the wiring through the wiring screw 23, all can use OT terminal to carry out the crimping for power cord and patch cord etc. and OT terminal cover is established on the wiring screw 23, and it can to screw the wiring screw 23 fixed for area of contact between the OT terminal is big, connects reliably, can not appear not hard up and the phenomenon of striking sparks.

The first fixing screw 21 penetrates through the ceramic block 25 from top to bottom to be connected with the fixing plate 24; the second fixing screw 22 passes through the ceramic block 25 from bottom to top to be connected with the conductor block 20. The number of the switching devices 3 is one or more, the switching devices 3 and the wiring devices 2 are arranged side by side, and the structures of the switching devices 3 are the same as those of the wiring devices 2; the first fixing screw 21 and the second fixing screw 22 are reasonably arranged in the locking direction, so that the wiring device 2 and the switching device 3 are compact in structure, the sizes of the cover body 14 and the mounting plate 13 can be reduced, and the mounting space occupied by the whole heater is saved. The setting of termination 2 and switching device 3 can effectively solve the difficult problem of heater doubling for the expansibility of heater is stronger, and during the switching electric wire, the patch cord holds in installation cavity 15, can prevent that the switching electric wire from exposing outside, and receives the influence of water or other debris.

As shown in fig. 7-8, the locking device 4 comprises a support 40, and a first locking block 41 and a second locking block 42 arranged on the support 40; the support 40 is arranged in the through holes 130 on the mounting plate 13, and the number of the through holes on the mounting plate 13 is the same as that of the locking devices 4, i.e. the number of the locking devices 4 can be changed according to the mounting requirements; the first locking piece 41 and the second locking piece 42 have a gap 412 therebetween for locking the electric wire, and the width of the gap 412 is adjustable. The width of the gap 412 is adjustable so that the locking device 4 can lock wires of different diameters. Compared with the existing heater, the electric wire entering the mounting cavity 15 from the outside is connected to the wiring device 2, the locking device 4 can lock the electric wire, and even if the machine vibrates violently, the insulating layer of the electric wire cannot be scraped, so that the hidden trouble of short circuit of the electric wire is avoided; moreover, the width of the gap 412 between the first locking block 41 and the second locking block 42 is changed, and only the adjusting screw 44 needs to be screwed, so that the operation is simple and convenient.

Wherein, the support 40 comprises a limiting piece 400, a connecting cylinder 401 and two brackets 402; the two brackets 402 are connected to one side of the limiting member 400, the first locking block 41 is located above the two brackets 402, and the second locking block 42 is located below the two brackets 402; a connecting cylinder 401 is connected on the other side of the limiting member 400, the connecting cylinder 401 is inserted into the through hole 130 of the mounting plate 13, and the connecting cylinder 401 extends into the mounting cavity 15.

Preferably, the locking device 4 further comprises a nut 43 and an adjusting screw 44; the outer wall of the connecting cylinder 401 is provided with threads 4010; the nut 43 is sleeved on the connecting cylinder 401, and the nut 43 is in threaded connection with the connecting cylinder 401; the mounting plate 13 has an inner side 131 and an outer side 132, the limiting member 400 abuts against the outer side 132 of the mounting plate 13, the nut 43 abuts against the inner side 131 of the mounting plate 13 to fix the support 40 on the mounting plate 13, and the limiting member 400 is arranged in a hexagonal shape, when the locking device 4 needs to be disassembled, the whole locking device 4 can be disassembled only by unscrewing the nut 43 from the connecting cylinder 401, and the hexagonal limiting member 400 is also beneficial to clamping tools such as a wrench.

Preferably, mounting holes 4120 are formed at both ends of the first locking block 41, both ends of the second locking block 42 and both brackets 402; one end of the first locking block 41 and one end of the second locking block 42 are connected to a bracket 402 through an adjusting screw 44, the other end of the first locking block 41 and the other end of the second locking block 42 are connected to another bracket 402 through another adjusting screw 44, and the heads of the two brackets 402 are provided with a guide fillet, so that the electric wire can enter the gap 412 conveniently on one hand, and the electric wire can be prevented from being cut by the support 40 on the other hand. The middle part of the first locking piece 41 is provided with a first cambered surface 410 which is concave upwards, and the middle part of the second locking piece 42 is provided with a second cambered surface 420 which is concave downwards; when the wire is locked in the gap 412, the wire is attached to the first arc 410 and the second arc 420.

In the working process, the heater is sleeved on the part to be heated and is fixed through the fixing device 16; the power cord enters the mounting cavity 15 from the gap 412 between the first locking block 41 and the second locking block 42 and is connected to the binding screw 23 through the OT terminal; wherein, the wiring screw 23 on one conductor block 20 of the wiring device 2 is communicated with the positive pole of the power supply, the wiring screw 23 on the other conductor block 20 of the wiring device 2 is communicated with the negative pole of the power supply, and the power line is locked by the locking device 4; according to actual needs, whether the switching device 3 is used or not is selected, and the wire switched from the interior of the heater can be fixed through another locking device 4; after the power supply is switched on, the heating element 11 works to generate heat, the heat is transferred to the part to be heated through the ceramic sheet 12, and the part to be heated is heated.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A heater, comprising:

2. The heater of claim 1, wherein said support comprises a retainer, a connecting cylinder and two brackets; the two brackets are connected to one side of the limiting piece, the first locking block is positioned above the two brackets, and the second locking block is positioned below the two brackets; the connecting cylinder is connected on the other side of the limiting part, penetrates through the through hole and extends into the installation cavity.

3. A heater according to claim 2, wherein said locking means further comprises a nut and an adjustment screw; the outer wall of the connecting cylinder is provided with threads; the nut is sleeved on the connecting cylinder and is in threaded connection with the connecting cylinder; the mounting plate is provided with an inner side surface and an outer side surface, the limiting piece abuts against the outer side surface of the mounting plate, and the nut abuts against the inner side surface of the mounting plate;

4. A heater according to claim 2 or 3, wherein the first locking piece middle portion has a first arc surface which is concave upward, and the second locking piece middle portion has a second arc surface which is concave downward; when the electric wire is locked in the gap, the electric wire is attached to the first cambered surface and the second cambered surface; the locating part is arranged in a hexagon shape.

5. The heater of claim 1, wherein said wiring means further comprises a first set screw, a second set screw, a wiring screw, a fixing plate and a ceramic block; the fixing plate is arranged on the shell, and the fixing plate, the ceramic block and the two conductor blocks are all provided with connecting holes;

6. The heater of claim 5, wherein the number of the adapter is one or more, the adapter is arranged side by side with the wiring device, and the structure of the adapter is the same as that of the wiring device.

7. The heater of claim 1, wherein the housing is cylindrical, and the housing has a through slot along an axial direction thereof, and the housing further has a circular hole communicating with the through slot.

8. The heater of claim 7, wherein the housing assembly further comprises a fixture and a ceramic plate disposed in the heating element; the fixing device comprises a bolt, a fixing nut and two fixing columns with bolt through holes, and the fixing column is arranged on the outer wall of the shell and positioned on the left side of the through groove; the other fixing column is arranged on the outer wall of the shell and is positioned on the right side of the through groove; the bolt sequentially penetrates through the two fixing columns to be connected with the fixing nut.

9. The heater of claim 1, wherein the two mounting plates are arranged in parallel, the tops of the two mounting plates extend to the side of the mounting cavity to form a plurality of fixing blocks, the bottoms of the two mounting plates extend to opposite directions relative to the mounting cavity to form a connecting plate, and the connecting plate is attached to the outer wall of the shell;

10. The heater of claim 9, wherein the cover has a cross-section of "[", which includes two side plates and a cover plate connected between the two side plates; the cover plate is arranged on the fixed block, and the two side plates are arranged on the side surfaces of the two mounting plates.