CN107891246B - Screw cap heating device and method - Google Patents
Screw cap heating device and method Download PDFInfo
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- CN107891246B CN107891246B CN201711115143.7A CN201711115143A CN107891246B CN 107891246 B CN107891246 B CN 107891246B CN 201711115143 A CN201711115143 A CN 201711115143A CN 107891246 B CN107891246 B CN 107891246B
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- screw cap
- heating
- cage
- heating device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
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Abstract
The invention discloses a screw cap heating device, wherein the screw cap is arranged on a screw rod, and the screw cap heating device is characterized by comprising two or more heating rods which are arranged in parallel, an upper circular ring fixed at the upper end of the heating rods and a lower circular ring fixed at the lower end of the heating rods, wherein the upper circular ring and the lower circular ring are mutually arranged in parallel to form a cage-shaped structure capable of containing the screw cap together with the heating rods, and the cage-shaped structure is arranged so that the screw cap can pass through the middle of the lower circular ring to enter the cage-shaped structure. The invention also comprises a method for heating the screw cap by using the screw cap heating device. The invention can rapidly and safely heat the screw cap which is difficult to detach, so that the screw cap expands, thereby facilitating the detachment of the screw cap.
Description
Technical Field
The invention belongs to the field of machinery, relates to a screw cap heating device and a screw cap heating method, and particularly relates to a device and a method for heating a screw cap difficult to disassemble.
Background
In the maintenance work of electric power devices, screw caps (nuts) which are difficult to remove are often encountered, for example, the screw caps are difficult to unscrew from the screws due to rust. In the prior art, staff often adopts the direct burning with open fire, or heats the screw cap with high frequency heating mode, because the nature of expend with heat and contract with cold makes the screw cap break away from the screw, but uses open fire heating, can bring the problem in the safety, and high frequency heating can make the screw heat together, and the effect is not good.
Disclosure of Invention
In order to solve the problems, the invention provides a screw cap heating device and a screw cap heating method, and the specific implementation scheme is as follows:
1. the screw cap heating device is characterized by comprising two or more heating rods which are arranged in parallel, an upper circular ring which is fixed at the upper end of the heating rods, and a lower circular ring which is fixed at the lower end of the heating rods, wherein the upper circular ring and the lower circular ring are arranged in parallel with each other to form a cage-shaped structure which can contain the screw cap together with the heating rods, and the cage-shaped structure is arranged so that the screw cap can pass through the middle of the lower circular ring to enter the cage-shaped structure.
The number of the heating rods can be 3-12, and the heating rods are tubular electric heating elements (electric heating tubes), and the maximum task temperature can reach 850 ℃. The heating rod takes a metal tube as a shell (comprising stainless steel and copper tubes), spiral electrothermal alloy wires (nickel-chromium and iron-chromium alloy) are axially and uniformly distributed along the center in the tube, gaps of the spiral electrothermal alloy wires are filled and compacted with magnesia with good insulating heat-conducting property, and two ends of a tube orifice are sealed by silica gel.
In some cases, the outer perimeter of the cage structure may be provided with a heat insulating jacket, the inner wall of which may be provided with a heat reflective layer, such as an aluminum foil layer.
2. The screw cap heating device according to claim 1, further comprising a heat insulating pad disposed below the lower ring, wherein a through hole allowing the screw cap to enter the cage-like structure is provided in a middle portion of the heat insulating pad, and the heat insulating pad extends to the periphery so as to prevent the screw cap heating device from heating an adjacent portion of the screw cap.
3. The screw cap heating device according to claim 1 or 2, wherein the upper ring and the lower ring are connected by one or more fixing bolts parallel to the heating rods and arranged between the heating rods, the heads of the fixing bolts are positioned below the lower ring, the screw rods of the fixing bolts sequentially penetrate through the fixing holes of the lower ring and the fixing holes of the upper ring and are fixed above the upper ring by nuts, and the heat insulation pad is fixed at the heads of the fixing bolts.
4. The screw cap heating device according to any one of claims 1 to 3, further comprising a wire collecting device disposed above the upper ring, wherein the wire collecting device is a hollow insulating housing, the front end of the wire collecting device is provided with an opening capable of accommodating a wire for supplying electric power to the heating rod, the wire connected with the heating rod is inserted from the opening of the wire collecting device and collected in the interior of the wire collecting device, the middle part of the outer side of the wire collecting device is provided with a power source lamp and a temperature alarm lamp, the rear end of the wire collecting device is provided with a bent holding part for holding by a user, and the outer side of the holding part is further provided with a power switch for controlling on-off of current in the wire.
5. A method of removing a screw cap from a bolt, comprising the steps of:
s100: providing the screw cap heating device according to any one of claims 1 to 4;
s200: energizing the screw cap heating device for 10-60 seconds to preheat the screw cap heating device;
s300: sleeving the preheated screw cap heating device on a screw cap to be heated which is screwed on a bolt, so that the screw cap to be heated passes through the middle of a lower circular ring of the cage-shaped structure and then enters the cage-shaped structure;
s400: continuously energizing the screw cap heating device and keeping the screw cap to be heated in the cage structure for 10-300 seconds so as to heat the screw cap;
s500: the screw cap heating device is removed from the heated screw cap in S400, and the heated screw cap is immediately unscrewed.
6. The method of heating a screw cap according to claim 5, wherein the heat insulating pad is placed between the screw cap heating device and the adjoining portion of the screw cap to be heated such that the screw cap heating device mainly heats the screw cap to be heated in S300.
7. The method for heating a screw cap according to claim 5 or 6, wherein if the screw cap is difficult to unscrew in step S500, steps S200 to S500 may be performed again after the screw cap is thoroughly cooled.
The method utilizes the principle that the heating rod is rapidly heated, the heated surface presents a high temperature heating rod to heat the rusted screw cap through the metal circular ring, the method can rapidly heat the screw cap from the outer surface, the device is separated when the temperature is not transmitted to the internal screw, and the screw cap can be quickly and safely unscrewed in an auxiliary way through the method.
The time of 3 to 5 seconds of power-on heating is tested as the optimal heating time, the heating temperature of the screw cap is insufficient for less than 3 seconds, and the temperature of the screw can be raised to be high together with the screw exceeding 5 seconds.
In some embodiments of the present invention, the lower ring of the screw cap heating device may be designed to have different inner hole diameters according to different specifications of screw caps so that the screw caps enter the cage-like structure through the lower ring.
In some embodiments of the present invention, the heating rods are set to have different lengths according to the length of the screw.
The method is used for the condition of screw caps and screws with different specifications, so that the specifications of the device provided by the invention are selected in various ways, and more requirements can be met.
In some embodiments of the present invention, the heating time in step S300 is preferably 10 to 20 seconds.
The preferred time is a preferred time obtained through testing.
Drawings
Fig. 1 is a schematic structural view of a screw cap heating device according to the present invention.
Fig. 2 is a schematic operation view of the screw cap heating device of the present invention.
The meaning of the reference numerals is as follows:
1, a heating rod; 21 is provided with a circular ring; 22 lower circular ring; 3, fixing bolts; 4, a line concentration device; 5 a holding part; 6, a power switch; 7, a power lamp; 8, a temperature alarm lamp; 9 electric wires; 11 rust bolts; 12 screw caps; 14 an abutment portion of the screw cap; 15 heat insulation pad
Detailed Description
The present invention is further described below in connection with examples for the purpose of facilitating understanding by those skilled in the art.
The screw cap heating device of the present invention as shown in fig. 1 comprises two or more heating rods 1 arranged in parallel, an upper ring 21 fixed at the upper end of the heating rods 1, and a lower ring 22 fixed at the lower end of the heating rods 1, wherein the upper ring 21 and the lower ring 22 are arranged in parallel to each other to form a cage structure capable of accommodating the screw cap 12 together with the heating rods 1, and the cage structure is arranged so that the screw cap 12 can pass through the middle of the lower ring 22 into the cage structure.
The number of the heating rods 1 can be 3-12, and the heating rods are tubular electric heating elements (electric heating tubes), and the maximum task temperature can reach 850 ℃. The heating rod 1 takes a metal tube as a shell (comprising stainless steel and copper tubes), spiral electrothermal alloy wires (nickel-chromium and iron-chromium alloy) are uniformly distributed along the axial direction of the center in the tube, gaps of the spiral electrothermal alloy wires are filled and compacted with magnesia with good insulating heat-conducting property, and two ends of a tube orifice are sealed by silica gel.
In some cases, the outer perimeter of the cage structure may be provided with a heat insulating jacket (not shown) whose inner wall may be provided with a heat reflective layer, such as an aluminum foil layer. In some cases, a wire cluster (not shown), such as a stainless wire cluster, is disposed within the cage, and when the nut is in the cage, the wire cluster contacts both the heating rod and the nut, and conducts heat from the heating rod to the nut so as to heat the nut more quickly, so that the temperature difference between the nut and the bolt sleeved within the nut is greater, and so that the bolt expands less when the nut is expanded by heat, facilitating subsequent more labor-efficient unscrewing of the nut. Advantageously, the wire clusters are annular and can be secured to the inner wall of the cage by binding the outer edges thereof, and the wire clusters can be sleeved on the entering nuts when the cage is sleeved on the nuts. Because the wire clusters are elastic and can be deformed greatly, even if the diameter of the screw cap is larger than the inner diameter of the annular wire clusters, the annular wire clusters can be conveniently sleeved on the screw cap, and therefore the annular wire clusters with the inner diameters smaller than 2cm, 1cm or 0.5cm can be selected.
The screw cap heating device further comprises a heat insulation pad 15 arranged below the lower circular ring 22, a through hole allowing the screw cap 12 to enter the cage-shaped structure is formed in the middle of the heat insulation pad 15, and the heat insulation pad 15 extends to the periphery so as to prevent the screw cap heating device from heating the abutting part 14 of the screw cap.
In the screw cap heating device, the upper ring 21 and the lower ring 22 are connected by one or more fixing bolts 3 arranged between the heating rods 1 and parallel to the heating rods 1, the heads of the fixing bolts 3 are positioned below the lower ring, the screw rods of the fixing bolts 3 sequentially pass through the fixing holes of the lower ring 22 and the fixing holes of the upper ring 21 and are fixed above the upper ring 21 by nuts, and the heat insulation pad 15 is fixed at the heads of the fixing bolts 3.
In the screw cap heating device, the screw cap heating device further comprises a wire collecting device 4 arranged above the upper circular ring 21, the wire collecting device 4 is a hollow insulating shell, the front end of the wire collecting device 4 is provided with an opening capable of containing an electric wire 9 for supplying electric energy to the heating rod 1, the electric wire 9 connected with the heating rod 1 is inserted from the opening of the wire collecting device 4 and is concentrated in the wire collecting device 4, the middle part of the outer side of the wire collecting device 4 is provided with a power lamp 7 and a temperature alarm lamp 8, the rear end of the wire collecting device 4 is provided with a bent holding part 6 for holding by a user, and the outer side of the holding part is also provided with a power switch 6 for controlling the on-off of electric current in the electric wire.
The method of heating screw cap 12 using the screw cap heating device of the present invention includes the steps of, as shown in figure 2,
s200: energizing the screw cap heating device for 10-60 seconds to preheat the screw cap heating device;
s300: sleeving the preheated screw cap heating device on the screw cap 12 to be heated so that the screw cap 12 to be heated passes through the middle of the lower circular ring 22 of the cage-shaped structure and enters the cage-shaped structure;
s400: continuously energizing the screw cap heating device and holding the screw cap to be heated in the cage-like structure for 10-300 seconds so as to heat the screw cap 12;
s500: the screw cap heating device is removed from the heated screw cap 12 in S400 and the heated screw cap 12 is immediately unscrewed.
In addition, the heat insulation pad 15 may be placed between the screw cap heating device and the abutting portion 14 of the screw cap to be heated such that the screw cap heating device mainly heats the screw cap 12 to be heated in S300.
If the screw cap is difficult to unscrew in step S500, steps S200 to S500 may be performed again after the screw cap is thoroughly cooled.
In some embodiments, the screw cap heating device of the present invention is a rust screw auxiliary heating device, referring to fig. 1, the device comprises two or more heating rods 1 and two metal rings 2 fixed at the upper and lower ends of the heating rods 1, the metal rings 2 and the heating rods 1 are mutually fixed by bolts 3, the bolts 3 are further covered with heat insulation pads 10 for heat insulation of the heating rods 1, and the rust screws 11 and screw caps 12 are prevented from being heated at the same time; the heating rod 1 is connected with an electric wire 9 and used for electrically heating the heating rod 1, the screw cap heating device further comprises a wire collecting device 4, the wire collecting device 4 is a hollow insulating shell, an opening capable of containing the electric wire is formed in the front end of the wire collecting device, the electric wire 9 connected with the heating rod is inserted from the opening of the wire collecting device 4 and is concentrated in the wire collecting device 4, a power lamp 7 and a temperature alarm lamp 8 are arranged in the middle of the outer side of the wire collecting device 4 and used for prompting whether a power supply is turned on or not and whether the temperature is overheated or not, a bent holding part 5 is arranged at the rear end of the wire collecting device 4 and used for being held by a user, and a power switch 6 is further arranged on the outer side of the holding part and used for controlling the on-off of current in the electric wire.
Referring to fig. 2, the metal ring 2 fixed with the heating rod is sleeved around the rusting screw 11, after the metal ring is electrified to heat, the heat insulation pad 10 can prevent heat from being conducted on the plane of the device fixed by the rusting screw, so that the screw cap can be conveniently and safely heated, and the rusting screw can be quickly unscrewed.
In some cases, the time of 3 to 5 seconds of power-on heating is tested as the optimal heating time, and the screw cap heating temperature is insufficient for less than 3 seconds, and the screw temperature can be raised to be high together with the screw exceeding 5 seconds.
In some embodiments of the invention, the heating time is preferably 10-20 seconds.
The method utilizes the principle that the heating rod is rapidly heated, the screw cap which is rusted is heated by the heating rod with the preheated surface being high-temperature, the screw cap can be rapidly heated from the outer surface, the device is separated when the temperature is not excessively transferred to the internal screw, and the screw cap can be rapidly and safely unscrewed in an auxiliary mode through the method.
The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; all such simple and equivalent changes and modifications as made by the claims and the content of the written specification shall fall within the scope of the patent covered by this invention.
Claims (6)
1. A screw cap heating device, wherein the screw cap is mounted on a screw rod, characterized by comprising two or more heating rods arranged in parallel, an upper circular ring fixed at the upper end of the heating rods and a lower circular ring fixed at the lower end of the heating rods, wherein the upper circular ring and the lower circular ring are mutually arranged in parallel to form a cage-shaped structure capable of accommodating the screw cap together with the heating rods, and the cage-shaped structure is arranged so that the screw cap can pass through the middle of the lower circular ring into the cage-shaped structure;
the metal wire group is arranged in the cage-shaped structure, and when the screw cap is in the cage-shaped structure, the metal wire group is contacted with the heating rod and the screw cap simultaneously, and the metal wire group is annular and can be fixed on the inner wall of the cage-shaped structure in a binding mode through the outer edge of the metal wire group.
2. The screw cap heating apparatus of claim 1, further comprising a heat insulating pad disposed below the lower ring, the heat insulating pad having a through hole in a middle portion thereof for allowing the screw cap to enter the cage structure, the heat insulating pad extending circumferentially so as to prevent the screw cap heating apparatus from heating an adjoining portion of the screw cap.
3. The screw cap heating device according to claim 2, wherein the upper ring and the lower ring are connected by one or more fixing bolts arranged between the heating rods and parallel to the heating rods, the heads of the fixing bolts are positioned below the lower ring, the screws of the fixing bolts sequentially pass through the fixing holes of the lower ring and the fixing holes of the upper ring and are fixed above the upper ring by nuts, and the heat insulation pad is fixed at the heads of the fixing bolts.
4. The screw cap heating device according to claim 1, further comprising a wire collecting device provided above the upper ring, the wire collecting device being a hollow insulating housing, a front end of the wire collecting device having an opening capable of receiving a wire for supplying electric power to the heating rod, the wire connected to the heating rod being inserted from the opening of the wire collecting device and collected inside the wire collecting device, a middle portion of an outer side of the wire collecting device having a power source lamp and a temperature alarm lamp, a rear end of the wire collecting device having a curved grip portion for a user to grip, an outer side of the grip portion further having a power source switch for controlling on-off of the current in the wire.
5. A method of removing a screw cap from a bolt, the method being applied to the apparatus of any one of claims 2-4, the method comprising the steps of:
s100: providing the screw cap heating device according to any one of claims 2-4;
s200: energizing the screw cap heating device for 10-60 seconds to preheat the screw cap heating device;
s300: sleeving the preheated screw cap heating device on a screw cap to be heated which is screwed on a bolt, so that the screw cap to be heated passes through the middle of a lower circular ring of the cage-shaped structure and then enters the cage-shaped structure;
s400: continuously energizing the screw cap heating device and keeping the screw cap to be heated in the cage structure for 10-300 seconds so as to heat the screw cap;
s500: the screw cap heating device is removed from the heated screw cap in S400, and the heated screw cap is immediately unscrewed.
6. The method of removing a screw cap from a bolt according to claim 5, wherein if the screw cap is difficult to unscrew in step S500, steps S200 to S500 are repeated after the screw cap is thoroughly cooled.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016110193762 | 2016-11-17 | ||
| CN201611019376 | 2016-11-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107891246A CN107891246A (en) | 2018-04-10 |
| CN107891246B true CN107891246B (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711115143.7A Active CN107891246B (en) | 2016-11-17 | 2017-11-13 | Screw cap heating device and method |
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| CN (1) | CN107891246B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1948424A1 (en) * | 1968-10-02 | 1970-04-09 | Okers Styckebruk Ab | Method for fastening carbide rolling rings on support cylinders |
| DE2558611C3 (en) * | 1975-12-24 | 1982-09-23 | Werner & Pfleiderer, 7000 Stuttgart | Process for the wear-resistant lining of the working area of screw extruders |
| CN102287936A (en) * | 2010-06-17 | 2011-12-21 | 杨丽 | Self-cleaning heat-collecting pipe |
| CN103447752B (en) * | 2013-08-24 | 2016-11-23 | 国网安徽天长市供电有限责任公司 | A kind of provision for disengagement of metallic plate screwing |
| CN103878530A (en) * | 2014-03-24 | 2014-06-25 | 江苏江北液压机械制造有限公司 | Combined type lifting induction heating disassembling-assembling machine |
| CN204934808U (en) * | 2015-08-17 | 2016-01-06 | 武汉锐泽科技发展有限公司 | Curvedly send tin syringe needle and send tin device |
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| CN107891246A (en) | 2018-04-10 |
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