Method and apparatus for static elimination in a glass fiber delivery process

Abstract

The application discloses a static electricity elimination method in a glass fiber conveying process, comprising the steps of feeding discharging, conveying discharging, blowing and discharging, and discharging; and a conveying device for eliminating static electricity, comprising a feeding hopper, a belt conveyor, a connecting piece, a discharging hopper and an air curtain knife which is arranged obliquely below the belt conveyor and sprays air flow obliquely to the return area of the conveying belt to form an air curtain; wherein the feeding hopper, the belt conveyor, the connecting piece and the discharging hopper are all grounded to eliminate the static electricity carried by the glass fiber during the whole process from feeding to discharging. The feeding hopper, the connecting piece, the belt conveyor and the discharging hopper of the conveying device are all grounded to make the conveying device completely grounded, release the static electricity generated by the friction of the glass fiber during the conveying process, spray the charged fluid through the air curtain knife, further neutralize and eliminate the static electricity of the glass fiber, and better solve the problem of static electricity accumulation of the glass fiber during the conveying process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of glass fiber production, in particular to a static electricity elimination method and device in the glass fiber conveying process. BACKGROUND

[0002] Glass fiber is a kind of high-performance inorganic non-metallic material with wide application, especially chopped glass fiber, which is often used in the fields of building, aerospace, automobile, electronics, etc. In the production and conveying process of glass fiber, static electricity is easily generated by friction with the conveying device, and strong adsorption is generated after the accumulation of static electricity, so that it is very difficult for glass fiber to be discharged from the conveying device, and a large amount of glass fiber may be accumulated due to static adsorption, which may block the connection between the hopper and the conveying belt and the transition position of the conveying belt.

[0003] At present, the air humidity in the factory is usually controlled (humidifier, air conditioning equipment, etc.) to reduce the generation and accumulation of static electricity, but since the glass fiber will be subjected to various frictions (such as friction with the hopper, connecting piece, conveying belt, etc.) in the conveying process, the glass fiber will still carry a large amount of static electricity. Therefore, by using the method of controlling the air humidity in the factory, the effect of solving the static accumulation in the glass fiber conveying process is not good. SUMMARY

[0004] The purpose of the present application is to provide a static electricity elimination method and device in the glass fiber conveying process, so as to solve the technical problem that the effect of solving the static accumulation in the glass fiber conveying process is not good by using the method of controlling the air humidity in the prior art.

[0005] To solve the above technical problems, the present application specifically provides the following technical solutions:

[0006] A static electricity elimination method in the glass fiber conveying process, comprising the following steps:

[0007] A, discharging during feeding; the feeding part of the conveying device is grounded, so that the glass fiber is in contact with the grounded feeding part before and during feeding, thereby releasing part of the static electricity carried by the glass fiber;

[0008] B, discharging during conveying; the conveying part of the conveying device is grounded, so that the glass fiber is in contact with the grounded conveying part during conveying, thereby further releasing part of the static electricity carried by the glass fiber;

[0009] C, blowing and discharging; the glass fiber with released static electricity falls into the discharging part of the conveying device, and the glass fiber without released static electricity is adsorbed on the conveying part of the conveying device, and the glass fiber carrying static electricity is stripped from the conveying part and falls into the discharging part by blowing air to the discharging part;

[0010] D, the discharging is discharged; the discharging part of the conveying device is grounded, so that the glass fiber carrying static electricity falls and contacts the discharging part, and part of the static electricity carried by the glass fiber is further released.

[0011] To solve the above technical problems, the application further provides the following technical solutions:

[0012] A conveying device for eliminating static electricity, using the above static electricity elimination method, comprising:

[0013] The upper hopper is used for containing glass fibers for feeding;

[0014] The belt conveyor comprises a conveying belt arranged below the upper hopper, and the conveying belt contains and conveys the glass fibers;

[0015] The connecting piece is arranged at the lower end of the upper hopper and covers the conveying belt, and a slot is arranged on the connecting piece to control the amount of glass fibers moving through the conveying belt;

[0016] The lower hopper is arranged below the belt conveyor to contain the glass fibers conveyed by the conveying belt;

[0017] The air curtain knife is arranged obliquely below the belt conveyor and sprays air flow obliquely to the return area of the conveying belt to form an air curtain, so as to strip the glass fibers from the conveying belt and fall into the lower hopper;

[0018] The upper hopper, the belt conveyor, the connecting piece and the lower hopper are all grounded to eliminate the static electricity carried by the glass fibers during the whole process of feeding to discharging, so as to prevent static electricity accumulation.

[0019] As a preferred embodiment of the application, it further comprises:

[0020] The static electricity generator is provided with a corona electrode arranged inside the air curtain knife to ionize the air flow and make it charged;

[0021] The air flow sprayed by the air curtain knife carries electric charges, and the electric charges carried by the air flow are opposite to the static electricity of the glass fibers, so that the air flow neutralizes the static electricity carried by the glass fibers after contacting the glass fibers, so that the glass fibers are easily blown by the air curtain into the lower hopper to prevent static electricity accumulation.

[0022] As a preferred embodiment of the application, the static electricity generator further comprises an electric field electrode arranged at the bottom of the lower hopper to generate an electric field in the lower hopper;

[0023] The air curtain knife sprays the airflow carrying excess electric charges, so that the electric charge carrying amount of the airflow is greater than the static electric charge amount of the glass fiber, so that the glass fiber is neutralized again, contacts the electric charges with the same polarity as the airflow, and is attracted by the electric field pole to accurately enter the lower hopper to prevent the glass fiber from being diffused into the air.

[0024] As a preferred scheme of the present application, the air curtain knife comprises a knife body, an air cavity is arranged in the knife body, an air gap is arranged on one side of the knife body, and a plurality of air holes are arranged in the knife body and communicate with the air cavity and the air gap, air in the air cavity is sprayed into the air gap along the air holes, and the air gap sprays the airflow to form an air curtain.

[0025] The corona pole is arranged in the air cavity.

[0026] As a preferred scheme of the present application, an atomizing nozzle and an air inlet pipe are arranged on the knife body, the spraying end of the atomizing nozzle is arranged in the air cavity, the liquid inlet end of the atomizing nozzle is arranged outside the knife body, and a high-pressure liquid supply device is connected to the air cavity to spray water mist.

[0027] The water mist sprayed by the atomizing nozzle is mixed with the air pumped by the air pump to form an air mist, so that the air curtain knife sprays the charged air mist, and the glass fiber is easily attached to the surface of the glass fiber for static neutralization.

[0028] As a preferred scheme of the present application, a heating pipe is arranged around the side wall of the lower hopper, and the heating pipe heats the inside of the lower hopper, so that the glass fiber attached with the air mist sprayed by the air curtain knife is dried.

[0029] As a preferred scheme of the present application, a booster air pump is arranged on the outer side wall of the lower hopper, an air suction pipe and a booster pipe are respectively arranged on the booster air pump, the air suction pipe is arranged on the lower hopper, and the booster pipe is connected with the air inlet pipe.

[0030] The end of the air suction pipe is arranged on the inner bottom of the lower hopper and is sleeved with a filter sleeve, so as to generate negative pressure in the lower hopper and generate suction force at the feeding port of the lower hopper.

[0031] As a preferred scheme of the present application, an insulating shell is arranged in the air cavity and attached to the inner wall of the air cavity, an insulating pipe is arranged in each air hole and connected with the insulating shell, and an insulating layer is coated in the air gap, the insulating layer covers the upper end of the insulating pipe, and covers the outer surface of the knife body.

[0032] As a preferred scheme of the present application, the connecting piece is a conductive rubber ring, and a plurality of conductive hairs are arranged on the inner top wall of the slot to make the glass fiber pass through the slot and contact the conductive hairs to discharge electricity;

[0033] The conveying belt comprises a rubber belt, a metal soft foil is arranged on the surface of the rubber belt, and a conductive brush is arranged at the bottom of the belt conveyor and contacts the metal soft foil in the return section of the conveying belt;

[0034] The side walls of the upper hopper and the lower hopper are made of conductive material;

[0035] The upper hopper, the lower hopper, the connecting piece and the conductive brush are all grounded.

[0036] Compared with the prior art, the present application has the following advantages:

[0037] The upper hopper, the connecting piece, the belt conveyor and the lower hopper of the conveying device are all grounded, so that the static electricity generated by the friction of the glass fiber during the conveying process is released, and the charged fluid is sprayed by the air curtain knife to further neutralize and eliminate the static electricity of the glass fiber, thereby better solving the problem of static electricity accumulation of the glass fiber during the conveying process. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only exemplary, and other drawings can be obtained by the provided drawings without creative labor for those skilled in the art.

[0039] Figure 1 The structure diagram of the static electricity eliminating conveying device provided by the embodiment of the present application is shown in the figure;

[0040] Figure 2 The static electricity generator part structure diagram of the static electricity eliminating conveying device provided by the embodiment of the present application is shown in the figure;

[0041] Figure 3 The booster air pump part structure diagram of the static electricity eliminating conveying device provided by the embodiment of the present application is shown in the figure;

[0042] Figure 4 The air curtain knife part structure diagram of the static electricity eliminating conveying device provided by the embodiment of the present application is shown in the figure;

[0043] Figure 5 The connecting piece part structure diagram of the static electricity eliminating conveying device provided by the embodiment of the present application is shown in the figure;

[0044] Figure 6 Figure 1 is a schematic view of a conveying belt part structure of a static electricity eliminating conveying device provided by an embodiment of the present application.

[0045] The reference signs in the figures respectively represent as follows:

[0046] 1 - upper hopper; 2 - belt conveyor; 3 - connecting piece; 4 - lower hopper; 5 - air curtain knife; 6 - static electricity generator; 7 - air pressure pump;

[0047] 21 - conveying belt; 22 -; 31 - strip port; 41 - heating pipe; 51 - knife body; 52 - air cavity; 53 - air slit; 54 - air hole; 55 - atomizing nozzle; 56 - air inlet pipe; 61 - corona electrode; 62 - electric field electrode; 71 - air extraction pipe; 72 - air pressure pipe;

[0048] 211 - rubber belt; 212 - metal soft foil; 311 - conductive hair; 521 - insulating shell; 531 - insulating layer; 541 - insulating pipe; 711 - filter sleeve. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0050] As shown in Figure 1, the present application provides a static electricity eliminating method in a glass fiber conveying process, comprising the following steps: Figure 1

[0051] A, upper material discharging; grounding the upper material component of the conveying device, so that the glass fiber contacts the grounded upper material component before and during the upper material, thereby releasing part of the static electricity carried by the glass fiber;

[0052] B, conveying discharging; grounding the conveying component of the conveying device, so that the glass fiber contacts the grounded conveying component during the conveying, thereby further releasing part of the static electricity carried by the glass fiber;

[0053] C, blowing and discharging; the glass fiber with released static electricity falls into the lower discharging component of the conveying device, the glass fiber with unreleased static electricity is adsorbed on the conveying component of the conveying device, and air is blown to the discharging port of the conveying component, so that the glass fiber carrying static electricity is stripped from the conveying component and falls into the lower discharging component;

[0054] ​D, the discharging is discharged; the discharging part of the conveying device is grounded, so that the glass fiber carrying static electricity falls and contacts the discharging part, and further releases part of the static electricity carried by the glass fiber.

[0055] The static electricity elimination method of the embodiment mainly utilizes the grounding discharge mode, and grounds each part of the conveying device in contact with the glass fiber, including but not limited to the feeding part, the conveying part and the discharging part, so that the glass fiber gradually releases the carried static electricity during transportation, to achieve the effect of static electricity prevention and prevent the glass fiber from being accumulated due to the static electricity adsorption effect.

[0056] Among them, the blowing and discharging can make part of the glass fiber not releasing static electricity peeled off from the conveying part, so that the conveyed glass fiber completely falls into the discharging part, thereby avoiding the situation that the glass fiber is adsorbed and cannot be discharged.

[0057] As shown in Figure 1 and Figure 5 According to the above method, a static electricity elimination conveying device is further provided, comprising:

[0058] The feeding hopper 1 is used for containing the glass fiber for feeding;

[0059] The belt conveyor 2 includes a conveying belt 21, which is arranged below the feeding hopper 1 and contains and conveys the glass fiber;

[0060] The connecting piece 3 is arranged at the lower end of the feeding hopper 1 and covers the conveying belt 21, and the connecting piece 3 is provided with a slot 31 to control the amount of glass fiber moving through the conveying belt 21;

[0061] The discharging hopper 4 is arranged below the belt conveyor 2 to contain the glass fiber conveyed by the conveying belt 21;

[0062] The air curtain knife 5 is arranged obliquely below the belt conveyor 2 and obliquely sprays air flow to the return area of the conveying belt 21 to form an air curtain, so as to peel off the glass fiber from the conveying belt 21 and fall into the discharging hopper 4;

[0063] Among them, the feeding hopper 1, the belt conveyor 2, the connecting piece 3 and the discharging hopper 4 are grounded to eliminate the static electricity carried by the glass fiber during the whole process from feeding to discharging, so as to prevent static electricity accumulation.

[0064] The conveying device of the embodiment mainly connects the upper hopper 1, the belt conveyor 2, the connecting piece 3 and the lower hopper 4 to ground, so that the glass fibers contact the upper hopper 1 to release static electricity, and then contact and release static electricity by being fed to the conveying belt 21 of the belt conveyor 2 through the connecting piece 3, and then are blown off from the return of the conveying belt 21 to the lower hopper 4 by the air curtain knife 5, contact the inner wall of the lower hopper 4 to release static electricity, so as to realize static electricity elimination in the whole conveying process and prevent static electricity accumulation of the glass fibers.

[0065] The lower hopper 4 is higher than the belt conveyor 2 on the side away from the belt conveyor 2, so as to reduce the possibility of the glass fibers being blown out of the lower hopper 4.

[0066] The strip opening 31 of the connecting piece 3 limits the glass fibers to be thinly spread on the conveying belt 21, so that the glass fibers contact the conveying belt 21 as much as possible in the conveying process, and the conveying belt 21 is grounded, so that the glass fibers can release a large amount of static electricity in the conveying process to prevent static electricity accumulation in the conveying process.

[0067] The air curtain knife 5 is connected with an external high-pressure air supply device to make the air curtain knife 5 spray air flow to form an air curtain.

[0068] The upper hopper 1 and the connecting piece 3 are the upper feeding components of the conveying device, the belt conveyor 2 is the conveying component of the conveying device, the lower hopper 4 is the lower feeding component of the conveying device, and the air curtain knife 5 is used to realize blowing and discharging.

[0069] In order to increase the effect of eliminating static electricity, as shown in Figure 2 and Figure 4 The static electricity generator 6 is further provided.

[0070] The static electricity generator 6 is provided with a corona electrode 61 arranged in the inside of the air curtain knife 5 to ionize the air flow to make it charged.

[0071] The air flow sprayed by the air curtain knife 5 carries charges, and the charges carried by the air flow are opposite to the static electricity of the glass fibers, so that the air flow can neutralize the static electricity of the glass fibers after contacting the glass fibers, so that the glass fibers are easily blown into the lower hopper 4 by the air curtain to prevent static electricity accumulation.

[0072] The static electricity generator 6 discharges through the corona electrode 61, so that the air in the air curtain knife 5 is ionized to carry charges opposite to the static electricity of the glass fibers, and then the air curtain formed by the charged air particles contacts the glass fibers, so that the static electricity of the glass fibers is neutralized and not charged, so that the glass fibers lose the static adsorption effect and are separated from the conveying belt 21 and are blown to the lower hopper 4 by the air curtain.

[0073] Since the electrostatic charge of the glass fiber is neutralized by the charged air, and the air can easily enter the gap of the large amount of glass fiber, the large amount of glass fiber can be continuously and comprehensively neutralized, so that the glass fiber is not charged and falls. Therefore, the air curtain generated by the air flow sprayed by the air curtain knife 5 is required to be understood, so that the internal pressure of the air curtain knife 5 can be reduced to reduce the energy consumption of static elimination in the conveying process.

[0074] Further, as shown in Figure 2 The electrostatic generator 6 also includes an electric field pole 62 arranged at the bottom of the hopper 4 to generate an electric field in the hopper 4.

[0075] The air curtain knife 5 sprays the air flow carrying excess charge, so that the charge carrying amount of the air flow is greater than the electrostatic charge amount of the glass fiber, so that the glass fiber is neutralized again, contacts the charge with the same polarity as the air flow, and is attracted by the electric field pole 62 to accurately enter the hopper 4, so as to prevent the glass fiber from being diffused into the air.

[0076] The electric field pole 62 is arranged at the bottom of the hopper 4, and the air flow sprayed by the air curtain knife 5 is ionized by the corona pole 61 to carry excess charge, so that the electrostatic charge of the glass fiber on the conveying belt 21 is neutralized, the charge carried by the air is attached to the glass fiber, and the glass fiber carries the charge opposite to the electric field pole 62. The electric field pole 62 has an attractive force to the glass fiber carrying the charge again, so that the glass fiber blown by the air curtain moves to the bottom of the hopper 4, thereby avoiding the diffusion of the glass fiber into the environment, and making the conveying more safe.

[0077] The air curtain knife 5 is used to connect the external high-pressure air supply device to spray air to generate an air curtain. The following provides a preferred embodiment to make the air curtain knife 5 cooperate with the corona pole 61 to spray the air flow carrying charge.

[0078] As shown in Figure 4 The air curtain knife 5 includes a knife body 51, an air cavity 52 is arranged in the knife body 51, a gas slit 53 is arranged on one side of the knife body 51, and a plurality of air holes 54 are arranged in the knife body 52 and communicated with the air cavity 52 and the gas slit 53. The air in the air cavity 52 is sprayed into the gas slit 53 through the air holes 54, and the gas slit 53 restrains the air flow to be sprayed to form an air curtain.

[0079] The corona pole 61 is arranged in the air cavity 52.

[0080] The external high-pressure air supply device pumps air into the air cavity 52, so that the pressure in the air cavity 52 increases, and then the air is sprayed into the gas slit 53 through the air holes 54. After being restrained by the gas slit 53, the air is sprayed in the form of a plane air flow to form an air curtain, that is, it can comprehensively cover the return width of the conveying belt 21.

[0081] The corona electrode 61 is arranged in the air cavity 52, that is, the air entering the air cavity 52 is ionized and carries electric charges. The corona electrode 61 is ionized by periodic high-voltage discharge, so as to control the amount of electric charges carried in the air by controlling the discharge frequency.

[0082] In order to make the excess electric charges carried by the air better adhere to the glass fibers, the following preferred embodiments are provided, so as to make the glass fibers carry electric charges opposite to the electric field pole 62.

[0083] As shown in the drawings, the atomizing nozzle 55 and the air inlet pipe 56 are arranged on the cutter body 51, the spraying end of the atomizing nozzle 55 is arranged in the air cavity 52, and the liquid inlet end of the atomizing nozzle 55 is arranged outside the cutter body 51, so as to connect a high-pressure liquid supply device to spray water mist into the air cavity 52. Figure 4

[0084] The water mist sprayed by the atomizing nozzle 55 is mixed with the air pumped by the air pump through the air inlet pipe 56 to form air mist, so that the air curtain cutter 5 sprays charged air mist, which is convenient for adhering to the surface of the glass fibers to neutralize static electricity.

[0085] By arranging the atomizing nozzle 55, the water mist is mixed in the air in the air cavity 52, and the mixed water mist and air are ionized and sprayed to the glass fibers, and the water mist is more easily adhered to the surface of the glass fibers, thereby improving the effect of neutralizing the static electricity carried by the glass fibers, and making the excess electric charges more easily adhere to the glass fibers, so that the glass fibers carry electric charges opposite to the electric field pole 62.

[0086] As shown in the drawings, the heating pipe 41 is arranged on the side wall of the lower hopper 4, and the heating pipe 41 heats the inside of the lower hopper 4, so that the glass fibers adhered with the air mist sprayed by the air curtain cutter 5 are dried. Figure 2 Figure 3 The glass fibers carrying electric charges adhered with the water mist enter the lower hopper 4, the electric charges on the glass fibers are neutralized by the electric field pole 62 and released by the grounding of the inner wall of the lower hopper 4, so that the glass fibers are not charged. At this time, the heating pipe 41 arranged in the inner wall of the lower hopper 4 can increase the temperature in the lower hopper 4, so that the water mist droplets adhered to the glass fibers are evaporated, and the glass fibers are dried and stored in the lower hopper 4.

[0087] As shown in the drawings, the booster air pump 7 is arranged on the outer side wall of the lower hopper 4, the booster air pump 7 is respectively provided with the air suction pipe 71 and the booster pipe 72, the air suction pipe 71 is arranged on the lower hopper 4, and the booster pipe 72 is connected with the air inlet pipe 56.

[0088] As shown in the drawings, the booster air pump 7 is arranged on the outer side wall of the lower hopper 4, the booster air pump 7 is respectively provided with the air suction pipe 71 and the booster pipe 72, the air suction pipe 71 is arranged on the lower hopper 4, and the booster pipe 72 is connected with the air inlet pipe 56. Figure 3

[0089] ​​​The end of the air suction pipe 71 is arranged at the inner bottom of the lower hopper 4 and is sleeved with a filter sleeve 711 to generate negative pressure in the lower hopper 4, so that the suction port of the lower hopper 4 generates suction force.

[0090] The external high-pressure air supply device adopts a booster air pump 7, which pumps air into the air cavity 52 through the booster pipe 72 and the air inlet pipe 56 to boost the air pressure in the air cavity 52, so that the air curtain knife 5 generates an air curtain.

[0091] The booster air pump 7 generates negative pressure in the lower hopper 4 through the air suction pipe 71, so that the suction port of the lower hopper 4 generates suction force to suck the glass fibers blown off by the air curtain knife 5 into the lower hopper 4, thereby avoiding the spread of glass fibers in the environment and being more secure.

[0092] In addition, the air flow generated by the booster air pump 7 through the air suction pipe 71 and the air supply pipe 72 forms a circulation above the lower hopper 4 and the return end of the conveying belt 21, so that the evaporated water mist is absorbed into the circulation, thereby increasing the air humidity of the conveying belt 21 at the lower hopper 4, and further reducing the amount of static electricity carried by the glass fibers. In addition, after the water mist participates in the circulation, the amount of water used can be reduced.

[0093] The filter sleeve 711 arranged at the end of the air suction pipe 71 can prevent glass fibers from being sucked in.

[0094] As shown in Figure 4 , an insulating shell 521 is arranged in the air cavity 52 and adheres to the inner wall of the air cavity 52, and an insulating pipe 541 connected to the insulating shell 521 is arranged in each air hole 54, and an insulating layer 531 is coated in the air gap 53, and the insulating layer 531 covers the upper end of the insulating pipe 541 and the outer surface of the knife body 51.

[0095] By arranging the insulating shell 521, the insulating pipe 541 and the insulating layer 531, the charged air flow is prevented from contacting the conductor to release the charge, that is, the charge stability of the charged air flow can be maintained.

[0096] The insulating shell 521 and the insulating pipe 541 are arranged in the air cavity 52 and the air hole 54 respectively, and have a longer insulating life to reduce the maintenance frequency of the air curtain knife 5, and the insulating shell 521 and the insulating pipe 541 are more easily to achieve high-grade insulation, so that the corona electrode 61 discharges at high voltage in the air cavity 52 without causing the knife body 52 to be charged, thereby improving safety.

[0097] As shown in Figure 5 and Figure 6 , the connecting piece 3 is a conductive rubber ring, and a plurality of conductive hairs 311 are arranged on the inner top wall of the strip opening 31 to make the glass fibers pass through the strip opening 31 and contact the conductive hairs 311 to discharge electricity;

[0098] The conveying belt 21 comprises a rubber belt 211, a metal soft foil 212 is arranged on the surface of the rubber belt 211, and a conductive brush 22 is arranged at the bottom of the belt conveyor 2 and is in contact with the metal soft foil 212 of the return section of the conveying belt 21;

[0099] The side walls of the upper hopper 1 and the lower hopper 4 are made of conductive material;

[0100] The upper hopper, the lower hopper 4, the connecting piece 3 and the conductive brush 22 are all grounded.

[0101] After the connecting piece 3 is grounded, the conductive bristles 311 are grounded, and the conductive bristles 311 can simultaneously contact more glass fibers passing through the strip port 31, so that the glass fibers on the upper layer of the conveying belt 21 are discharged to eliminate static electricity.

[0102] By covering the metal soft foil 212 on the surface of the rubber belt 211, a larger conductive surface area is provided, so that the glass fibers on the lower layer of the conveying belt 21 are discharged to eliminate static electricity. The static electricity is discharged through the conductive brush 22, and the conductive brush 22 is arranged below the return section and does not affect the conveying of the glass fibers by the conveying belt 21.

[0103] The above examples are only exemplary embodiments of the present application and are not used to limit the present application, and the protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements shall also be considered to fall within the protection scope of the present application.

Claims

1. A conveying device for eliminating static electricity, characterized in that, include: The feeding hopper (1) is used to hold glass fiber for feeding. A belt conveyor (2) includes a conveyor belt (21) disposed below the feed hopper (1), the conveyor belt (21) receiving and conveying glass fiber; A connector (3) is provided at the lower end of the feeding hopper (1) and covers the conveyor belt (21). The connector (3) is provided with a slot (31) to control the amount of glass fiber passing through as it moves with the conveyor belt (21). A hopper (4) is located below the belt conveyor (2) to hold the glass fiber conveyed by the conveyor belt (21); An air curtain knife (5) is inclinedly positioned below the belt conveyor (2) and sprays airflow at an angle toward the return area of ​​the conveyor belt (21) to form an air curtain, so as to peel the glass fiber from the conveyor belt (21) and drop it into the hopper (4). The feeding hopper (1), belt conveyor (2), connector (3) and unloading hopper (4) are all grounded to eliminate the static charge carried by the glass fiber during the entire process from feeding to unloading, so as to prevent static electricity accumulation. An electrostatic generator (6) is provided with a corona electrode (61), which is disposed inside the air curtain knife (5) to ionize the airflow and make it charged; The airflow carrying charge is ejected by the air curtain knife (5), and the charge carried by the airflow is opposite to the static charge of the glass fiber, so that the airflow neutralizes the static charge of the glass fiber after contacting the glass fiber, thereby making the glass fiber easy to be blown into the hopper (4) by the air curtain to prevent static electricity accumulation. The electrostatic generator (6) further includes an electric field electrode (62), which is disposed at the bottom of the hopper (4) to generate an electric field within the hopper (4); The air curtain knife (5) sprays out an airflow carrying an excessive charge, so that the charge carried by the airflow is greater than the static charge of the glass fiber, so that the glass fiber is neutralized and then comes into contact with the charge carrying the same polarity as the airflow, and is attracted by the electric field electrode (62) and accurately enters the feed hopper (4) to prevent the glass fiber from being diffused into the air. The method for eliminating static electricity during the conveying of glass fibers using a conveying device includes the following steps: A. Loading discharge: Ground the loading component of the conveying device so that the glass fiber contacts the grounded loading component before and during loading, thereby releasing some of the static electricity carried by the glass fiber. B. Conveying and discharging: Grounding the conveying components of the conveying device so that during the conveying process, the glass fiber comes into contact with the grounded conveying components, further releasing some of the static electricity carried by the glass fiber; C. Blowing and dropping: The glass fibers that have released static electricity fall into the feeding part of the conveying device, while the glass fibers that have not released static electricity are adsorbed on the conveying part of the conveying device. By blowing air into the dropping point of the conveying part, the glass fibers carrying static charge are peeled off from the conveying part and fall into the feeding part. D. Discharge during material feeding: Ground the feeding component of the conveying device so that the glass fiber carrying static charge falls and contacts the feeding component, further releasing some of the static electricity carried by the glass fiber.

2. The static electricity elimination conveying device according to claim 1, characterized in that, The air curtain knife (5) includes a knife body (51), an air cavity (52) is provided in the knife body (51), and an air slit (53) is provided on one side of the knife body (51). A plurality of air holes (54) are provided in the knife body (51) to connect the air cavity (52) and the air slit (53). Air in the air cavity (52) is sprayed into the air slit (53) along the air holes (54). The air slit (53) constrains the airflow to form an air curtain. The corona electrode (61) is disposed in the air cavity (52).

3. The electrostatic discharge conveying device according to claim 2, characterized in that, An atomizing nozzle (55) and an air inlet pipe (56) are provided on the blade body (51), and the spraying end of the atomizing nozzle (55) is located in the air chamber (52), while the liquid inlet end of the atomizing nozzle (55) is located on the outside of the blade body (51) to connect to a high-pressure liquid supply device to spray water mist into the air chamber (52); The atomizing nozzle (55) sprays water mist, which mixes with the air pumped in by the air pump through the air inlet pipe (56) to form an air mist, so that the air curtain knife (5) sprays out an electrically charged mist, which is convenient to adhere to the glass fiber surface for electrostatic neutralization.

4. The static electricity elimination conveying device according to claim 3, characterized in that, A heating tube (41) is embedded and arranged around the side wall of the feeding hopper (4). The heating tube (41) heats the inside of the feeding hopper (4) so ​​that the glass fiber that is wetted by the mist sprayed by the air curtain knife (5) is dried.

5. The static electricity elimination conveying device according to claim 3, characterized in that, A booster air pump (7) is provided on the outer wall of the hopper (4). The booster air pump (7) is provided with an air extraction pipe (71) and a booster pipe (72). The air extraction pipe (71) is provided on the hopper (4), and the booster pipe (72) is connected to the air inlet pipe (56). The end of the suction pipe (71) is placed at the bottom of the hopper (4) and fitted with a filter sleeve (711) to generate negative pressure in the hopper (4) and generate suction at the feed inlet of the hopper (4).

6. The electrostatic discharge conveying device according to claim 2, characterized in that, An insulating shell (521) is provided in the air cavity (52) and attached to the inner wall of the air cavity (52). An insulating tube (541) is provided in each air hole (54) and connected to the insulating shell (521). An insulating layer (531) is coated in the air gap (53), and the insulating layer (531) covers the upper end of the insulating tube (541) and the outer surface of the blade body (51).

7. The electrostatic discharge conveying device according to claim 1, characterized in that, The connector (3) is a conductive rubber ring, and multiple conductive filaments (311) are provided on the inner top wall of the slot (31) so that the glass fiber passes through the slot (31) and contacts the conductive filaments (311) to discharge. The conveyor belt (21) includes a rubber belt (211), a metal foil (212) is provided on the surface of the rubber belt (211), a conductive brush (22) is provided at the bottom of the belt conveyor (2), and the conductive brush (22) contacts the metal foil (212) in the middle of the return stroke of the conveyor belt (21). The side walls of the upper hopper (1) and the lower hopper (4) are both made of conductive material; The feeding hopper, the unloading hopper (4), the connecting piece (3), and the conductive brush (22) are all equipped with grounding wires.

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