Fuse tube and production process thereof

Abstract

The application is suitable for the technical field of fuse tube production, and provides a fuse tube and a production process thereof, which comprises the following raw materials in a weight ratio: 64%-71% of multi-axial sewing aramid yarn, 11.5%-14% of arc extinguishing resin, 10%-11.7% of curing agent, 4.5%-6.2% of diluent, 2%-2.6% of accelerator and 1%-1.5% of filler. The fuse tube produced by the application not only has the characteristics of extremely low water absorption, but also has good insulation, arc extinguishing and mechanical strength, fundamentally solves the problems of delamination of the fuse tube exposed in air for a long time, low insulation strength and the like, the production cycle is reduced from one month to 2 days, the yield is greatly improved, and the production process is easy to operate. Moreover, the finished product rate is also improved by 80%.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fuse tube production, and particularly relates to a fuse tube and a production process thereof. BACKGROUND

[0002] The fuse tube is a core component of a fuse, and the performance of the fuse tube determines the quality of the fuse. The fuse refers to a kind of electrical appliance that breaks the circuit by melting the fuse body with the heat generated by itself when the current exceeds the specified value. The fuse is widely applied to high and low voltage distribution systems and control systems and electrical equipment, and is used as a protector of short circuit and overcurrent, and is one of the most commonly used protection devices.

[0003] The current drop-out fuse fuse tube is a composite material with a sulfidized fiber tube (the sulfidized fiber tube is a kind of paper product, so it has high water absorption) inside and an epoxy winding tube outside. The product has excellent arc extinguishing performance and good mechanical strength. However, due to the water absorption of the internal sulfidized fiber, the overall water absorption of the product is too large, and the product is easily affected by the environment. When exposed to air for a long time, due to factors such as temperature and humidity, the insulation strength of the fuse tube will decrease, and the internal layering will occur. The production cycle of the internal sulfidized fiber tube is long, generally one month, the process is complex, and the scrap rate is high, which seriously restricts the production of the product.

[0004] The application greatly reduces the water absorption of the product by changing the arc extinguishing material inside the fuse tube, and also has good insulation, arc extinguishing and mechanical strength. The problems of layering and low insulation strength of the fuse tube exposed to air for a long time are fundamentally solved. SUMMARY

[0005] The purpose of the embodiment of the application is to provide a fuse tube and a production process thereof, and to solve the problems of layering and low insulation strength of the fuse tube exposed to air for a long time.

[0006] The application is implemented as follows: a fuse tube and a production process thereof, the fuse tube comprises the following raw materials in a weight ratio:

[0007] 64%-71% of multi-axial seam-woven aramid yarn, 11.5%-14% of arc extinguishing resin, 10%-11.7% of curing agent, 4.5%-6.2% of diluent, 2%-2.6% of accelerator, and 1%-1.5% of filler.

[0008] In a further technical solution, the specification of the multi-axial seam-woven aramid yarn is 580-860 g / m 2 , the tensile strength is 200-500 MPa, the tensile modulus is 19500 MPa, and the breaking elongation is 3%.

[0009] A production process of a fuse tube comprises the following steps:

[0010] Step one, take a certain amount of multi-axial stitching aramid yarn, arc extinguishing resin, curing agent, diluent, accelerator and filler for use;

[0011] Step two, the arc extinguishing resin, curing agent, diluent, accelerator and filler in step one are mixed into a glue solution;

[0012] Step three, the glue solution is heated and stirred thoroughly;

[0013] Step four, after stirring, pour into the insulation pipe winding machine glue tank, cool to room temperature for use;

[0014] Step five, cut the multi-axial stitching aramid yarn to the appropriate size;

[0015] Step six, cut the multi-axial stitching aramid yarn on the insulation pipe winding machine, after gluing, wind into a round tube;

[0016] Step seven, the wound round tube is placed in a drying oven to facilitate rapid curing of the glue solution.

[0017] Further technical solutions, the environment temperature for mixing the glue solution in step two is room temperature 25 degrees Celsius.

[0018] Further technical solutions, the glue solution heating temperature in step three is 45-60 degrees Celsius.

[0019] Further technical solutions, the temperature of the drying oven in step seven is set to 60-80 degrees Celsius.

[0020] Further technical solutions, the drying time in step seven is adjusted according to the thickness of the tube wall, and the drying time is between 2-12 hours.

[0021] The fuse tube and its production process provided by the embodiment of the application has the characteristics of extremely low water absorption, good insulation, arc extinguishing and mechanical strength, fundamentally solves the problems of delamination of the fuse tube exposed to air for a long time, low insulation strength, etc., reduces the production cycle from one month to two days, greatly improves the yield, is easy to operate, and improves the finished product rate by 80%. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The process flow diagram of the fuse tube and its production process provided by the embodiment of the application. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and not to limit the present application.

[0024] The specific implementation of the present application is described in detail below in combination with specific examples.

[0025] Example 1

[0026] A fuse tube, comprising raw materials in the following weight ratio:

[0027] 64% of multi-axial stitched aramid yarn, 11.5% of arc extinguishing resin, 10% of curing agent, 4.5% of diluent, 2% of accelerator and 1% of filler.

[0028] The multi-axial stitched aramid yarn is a customized product with a specification of 580-860 g / m2, a tensile strength of 200-500 MPa, a tensile modulus of 19500 MPa and a breaking elongation of 3%. The arc extinguishing resin is bisphenol A epoxy resin with a brand E51. The curing agent is triethylene tetramine (TETA) which releases a large amount of heat during the curing process and cures quickly. The diluent is ethylene glycol diglycidyl ether which participates in the curing reaction, reduces the viscosity of the resin and improves the process performance of the resin. The accelerator is methyldiethanolamine and amine phenol which accelerates the reaction. The filler is aluminum hydroxide and silicon dioxide which respectively functions to extinguish fire and smoke and improve the electrical insulation performance.

[0029] A production process of a fuse tube, comprising the following steps:

[0030] Step 1, taking a certain amount of multi-axial stitched aramid yarn, arc extinguishing resin, curing agent, diluent, accelerator and filler for standby;

[0031] Step 2, mixing the arc extinguishing resin, curing agent, diluent, accelerator and filler in step 1 into a glue solution at room temperature 25 degrees Celsius;

[0032] Step 3, heating the glue solution to 45 degrees Celsius and stirring thoroughly;

[0033] Step 4, pouring the glue solution into the glue tank of the insulation winding machine after stirring and cooling to room temperature for standby;

[0034] Step 5, cutting the multi-axial stitched aramid yarn to a suitable size. The size of the aramid yarn is cut according to different purposes, such as 10kv high-voltage arc extinguishing arc tube which requires thick wall and long aramid yarn. If it is 1kv arc extinguishing, the tube wall is thin and the aramid yarn is short.

[0035] Step six, the cut multi-axial stitched aramid yarn is wound on the insulation pipe winding machine, and after the glue is cured, a round pipe is formed;

[0036] Step seven, the wound round pipe is placed in a drying oven, the temperature of the drying oven is set to 60 degrees Celsius, so that the glue solution is quickly solidified and formed, and the drying time is adjusted according to the thickness of the pipe wall, and the drying time is controlled to be between 2-12 hours.

[0037] Example two

[0038] A fuse tube comprises raw materials in the following weight ratio:

[0039] 64% of multi-axial stitched aramid yarn, 11.5% of arc extinguishing resin, 10% of curing agent, 4.5% of diluent, 2% of accelerator and 1% of filler.

[0040] The multi-axial stitched aramid yarn is a customized product, the specification of which is 580-860 g / m2, the tensile strength is 200-500 MPa, the tensile modulus is 19500 MPa, and the tensile elongation at break is 3%. The arc extinguishing resin is bisphenol A epoxy resin, the model number of which is E51. The curing agent is triethylenetetramine (TETA), which releases a large amount of heat during the curing process and is quickly cured. The diluent is ethylene glycol diglycidyl ether, which participates in the curing reaction, reduces the viscosity of the resin and improves the process performance of the resin. The accelerator is methyldiethanolamine and amine phenol, which accelerates the reaction. The filler is aluminum hydroxide and silicon dioxide, which respectively functions to extinguish fire and smoke and improve the electrical insulation performance.

[0041] A production process of a fuse tube comprises the following steps:

[0042] Step one, a certain amount of multi-axial stitched aramid yarn, arc extinguishing resin, curing agent, diluent, accelerator and filler are prepared;

[0043] Step two, the arc extinguishing resin, curing agent, diluent, accelerator and filler in step one are mixed into a glue solution at room temperature of 25 degrees Celsius;

[0044] Step three, the glue solution is heated to 60 degrees Celsius and stirred thoroughly;

[0045] Step four, after stirring, the glue solution is poured into the glue tank of the insulation pipe winding machine and cooled to room temperature for use;

[0046] Step five, the multi-axial stitched aramid yarn is cut to a suitable size, and the size of the aramid yarn is cut according to different purposes. For example, if a 10kv high-voltage arc extinguishing tube is needed, the pipe wall should be thick, and the aramid yarn should be long. If a 1kv arc extinguishing tube is needed, the pipe wall should be thin, and the aramid yarn should be short.

[0047] Step six, the cut multi-axial stitched aramid yarn is wound on the insulation pipe winding machine, and after the glue is cured, a round pipe is formed;

[0048] Step seven, the rolled round pipe is placed into a drying box, the temperature of the drying box is set to 80 degrees Celsius, so that the glue solution is quickly cured and formed, the drying time is adjusted according to the thickness of the pipe wall, and the drying time is controlled to be between 2-12 hours.

[0049] Example three

[0050] A fuse tube, the fuse tube comprises raw materials in the following weight ratio:

[0051] 71% of multi-axial stitched aramid yarn, 14% of arc extinguishing resin, 11.7% of curing agent, 6.2% of diluent, 2.6% of accelerator and 1.5% of filler.

[0052] The multi-axial stitched aramid yarn is a customized product, the specification is 580-860 g / m2, the tensile strength is 200-500 MPa, the tensile modulus is 19500 MPa, and the breaking elongation is 3%; the arc extinguishing resin is bisphenol A epoxy resin, the brand is E51; the curing agent is triethylenetetramine (TETA), which releases a large amount of heat during the curing process and cures quickly; the diluent is ethylene glycol diglycidyl ether, which participates in the curing reaction, reduces the viscosity of the resin and improves the process performance of the resin; the accelerator is methyldiethanolamine and amine phenol, which accelerates the reaction; the filler is aluminum oxide and silicon dioxide, which respectively functions to extinguish fire and smoke and improve the electrical insulation performance.

[0053] A production process of a fuse tube, comprising the following steps:

[0054] Step one, a certain amount of multi-axial stitched aramid yarn, arc extinguishing resin, curing agent, diluent, accelerator and filler are prepared;

[0055] Step two, the arc extinguishing resin, curing agent, diluent, accelerator and filler in step one are mixed into a glue solution at room temperature 25 degrees Celsius;

[0056] Step three, the glue solution is heated to 45 degrees Celsius and stirred thoroughly;

[0057] Step four, after stirring, pour into the glue tank of the insulation pipe winding machine, and cool to room temperature for standby;

[0058] Step five, the multi-axial stitched aramid yarn is cut to a suitable size, and the size of the aramid yarn is cut according to different purposes, such as 10kv high-voltage arc extinguishing, the pipe wall needs to be thick, and the aramid yarn needs to be long. If it is 1kv arc extinguishing, the pipe wall is thin, and the aramid yarn is short.

[0059] Step six, the cut multi-axial stitched aramid yarn is wound on the insulation pipe winding machine, and is wound into a round pipe after gluing;

[0060] Step seven, put the rolled round tube into the drying oven, set the temperature of the drying oven to 60 degrees Celsius, so that the glue solution can quickly solidify and form, the drying time is adjusted according to the thickness of the tube wall, and the drying time is controlled to be between 2-12 hours.

[0061] Example four

[0062] A fuse tube, comprising raw materials in the following weight ratio:

[0063] 71% of multi-axial stitched aramid yarn, 14% of arc extinguishing resin, 11.7% of curing agent, 6.2% of diluent, 2.6% of accelerator, and 1.5% of filler.

[0064] The multi-axial stitched aramid yarn is a customized product with a specification of 580-860 g / m2, a tensile strength of 200-500 MPa, a tensile modulus of 19500 MPa, and a breaking elongation of 3%. The arc extinguishing resin is bisphenol A epoxy resin with a brand E51. The curing agent is triethylenetetramine (TETA), which releases a large amount of heat during the curing process and cures quickly. The diluent is ethylene glycol diglycidyl ether, which participates in the curing reaction, reduces the viscosity of the resin, and improves the process performance of the resin. The accelerator is methyldiethanolamine and amine phenol, which accelerates the reaction. The filler is aluminum oxide and silicon dioxide, which respectively functions to extinguish fire and smoke and improve electrical insulation performance.

[0065] A production process of a fuse tube, comprising the following steps:

[0066] Step one, take a certain amount of multi-axial stitched aramid yarn, arc extinguishing resin, curing agent, diluent, accelerator, and filler for standby;

[0067] Step two, mix the arc extinguishing resin, curing agent, diluent, accelerator, and filler in step one into a glue solution at room temperature of 25 degrees Celsius;

[0068] Step three, heat the glue solution to 60 degrees Celsius and stir thoroughly;

[0069] Step four, pour the glue solution into the glue tank of the insulation pipe winding machine after stirring, and cool to room temperature for standby;

[0070] Step five, cut the multi-axial stitched aramid yarn to a suitable size, and the size of the aramid yarn is cut according to different purposes, such as 10kv high-voltage arc extinguishing, which requires thick tube wall and long aramid yarn. If it is 1kv arc extinguishing, the tube wall is thin, and the aramid yarn is short.

[0071] Step six, put the cut multi-axial stitched aramid yarn into the insulation pipe winding machine, and wind it into a round tube after gluing;

[0072] Step seven, the rolled round pipe is placed into a drying oven, the temperature of the drying oven is set to 80 degrees Celsius, so that the glue solution is rapidly cured and formed, the drying time is adjusted according to the thickness of the pipe wall, and the drying time is controlled to be between 2-12 hours.

[0073] The key point of the application is a unique formula. The internal material of the domestic fuse tube is vulcanized fiber. Although it has good insulation and arc extinguishing properties, it also has high water absorption. High water absorption leads to internal delamination, low insulation strength and other problems after long-term use. The new formula completely solves this technical problem. The arc extinguishing tube manufacturing and drying process in the production process of the fuse tube are improved. The fuse tube (high molecular tube) in the application is used to replace the original vulcanized fiber tube. The product not only has insulation, arc extinguishing, good mechanical strength, but most importantly, the material made of the new formula has very low water absorption. This is a major breakthrough in material science. The fuse tube made by the application has excellent insulation performance and arc extinguishing performance, and very low water absorption, which meets the quality requirements of the international market, improves the quality of domestic fuses, and fills the gap in domestic technology.

[0074] The above only describes the preferred embodiments of the application and is not intended to limit the application. Any modifications, equivalent replacements and improvements made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A fuse tube, characterized in that, The fuse tube comprises the following raw materials in the following weight ratio: 64%-71% multiaxial stitch-braided aramid yarn, 11.5%-14% arc-quenching resin, 10%-11.7% curing agent, 4.5%-6.2% diluent, 2%-2.6% accelerator and 1%-1.5% filler; The specifications of the multiaxial stitch-bonded aramid yarn are 580-860 g / m. 2 Tensile strength is 200-500 MPa, tensile modulus is 19500 MPa, and elongation at break is 3%. The manufacturing process of the aforementioned fuse tube includes the following steps: Step 1: Take a certain amount of multiaxial stitch-bonded aramid yarn, arc-quenching resin, curing agent, diluent, accelerator and filler for later use; Step 2: Mix the arc-quenching resin, curing agent, diluent, accelerator and filler from Step 1 to form a glue solution; Step 3: Heat the adhesive solution and stir thoroughly; Step 4: After stirring, pour the mixture into the glue tank of the insulating tube winding machine and let it cool to room temperature before use. Step 5: Cut the multi-axial stitched aramid yarn to the appropriate size; Step 6: After cutting, the multi-axial stitch-bonded aramid yarn is placed on an insulating tube winding machine, glued, and then wound into a round tube; Step 7: Place the rolled-up round tube into a drying oven to allow the adhesive solution to cure and solidify quickly. In step two, the ambient temperature for mixing the adhesive solution is room temperature, 25 degrees Celsius. The heating temperature of the adhesive solution in step three is 45-60 degrees Celsius. In step seven, the temperature of the drying oven is set to 60-80 degrees Celsius. The drying time in step seven is adjusted according to the thickness of the pipe wall, and the drying time is between 2 and 12 hours.

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