Glass fiber production line and kiln feeding device

Abstract

The utility model discloses a glass fiber production line and a kiln feeding device. The kiln feeding device comprises a feeding assembly and a second control valve; the feeding assembly comprises a weighing bin capable of vertically discharging materials, breathable and non-permeable flexible connecting sleeves, a weighing device and a first control valve, and the two flexible connecting sleeves communicate with the upper end and the lower end of the weighing bin along the discharging track of the weighing bin correspondingly. The weighing device comprises a mounting end which can be fixedly arranged in a site and a weighing end which is connected with the weighing bin and can weigh the feeding assembly, the first control valve is arranged above the lower flexible connecting sleeve, and the second control valve is arranged above the upper flexible connecting sleeve. The weighing device can accurately weigh the feeding assembly, the material consumption can be accurately and reliably recorded, analyzed, regulated and controlled, and it is guaranteed that the feeding amount is stable and uniform; the soft connecting sleeve can be quickly connected with upstream and downstream equipment, a ventilation function is exerted, the feeding assembly is independent of other equipment of the system, the weighing precision of the weighing device is guaranteed, and the installation characteristic and the maintenance characteristic of the device are improved.

Description

Technical Field

[0001] The present application relates to the technical field of raw material transportation, and in particular to a kiln feeding device, and also to a glass fiber production line, comprising the kiln feeding device. Background Art

[0002] In the glass fiber production process, the feeding control accuracy directly affects the quality of glass melting. For example, the higher the feeding accuracy, the more stable the liquid level in the kiln can be guaranteed, and the higher the feeding accuracy, the easier it is to control the temperature of the hot spot.

[0003] Since the inventory level of the feeding equipment upstream of the kiln is significantly larger than the material consumption level of the kiln per unit time, it is difficult to accurately control the amount of material added to the kiln by monitoring and adjusting the aforementioned feeding equipment. Only a rough trend judgment can be made on the amount of material added, which can easily lead to frequent and large fluctuations in daily feeding deviations, thereby causing unstable glass melting quality.

[0004] In order to control the feeding accuracy, although weighing devices such as weight sensors can be installed in front of the entrance of the kiln to weigh the materials, the common weighing devices are set in the production line where the kiln is located. Their weighing accuracy is easily affected by other devices in the production line, and they are difficult to disassemble and assemble, which is not conducive to regular observation and maintenance, and it is difficult to ensure that the weighing device can effectively play its weighing effect.

[0005] In summary, how to accurately and reliably know the amount of material added to the kiln has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of the present application is to provide a kiln feeding device, which can accurately and reliably know the amount of feeding to the kiln, and has good installation and maintenance characteristics, which is conducive to long-term and reliable control of feeding accuracy. Another purpose of the present application is to provide a glass fiber production line, including the above-mentioned kiln feeding device.

[0007] To achieve the above-mentioned purpose, the present application provides a kiln charging device, including a charging component, the charging component including:

[0008] Weighing bin for vertical material drop;

[0009] A soft connection sleeve that is air-permeable but not material-permeable; two soft connection sleeves are connected to the upper and lower ends of the weighing bin along the material drop track of the weighing bin;

[0010] The weighing device includes a mounting end that can be fixed in the site and a weighing end connected to the weighing bin and capable of weighing the feeding assembly;

[0011] The first control valve is arranged above the lower flexible connection sleeve and is used to control the material to flow out of the flexible connection sleeve;

[0012] Also includes:

[0013] The second control valve is arranged above the upper flexible connection sleeve and is used to control the material to enter the flexible connection sleeve.

[0014] In some embodiments, the weighing device further comprises:

[0015] A net weight calculation unit connected to the weighing end and used to calculate the net weight of the material in the weighing bin according to the measured value of the weighing end and the equipment net weight of the feeding assembly;

[0016] A weighing display unit connected to the net weight calculation unit and used to display the net weight of the material.

[0017] In some embodiments, a spiral metering and feeding mechanism is also included; the outlet of the spiral metering and feeding mechanism is connected to the upper soft connection sleeve through a second control valve.

[0018] In some embodiments, the weighing device includes a cantilever beam weighing sensor; the mounting end and the weighing end are both arranged on the cantilever beam weighing sensor.

[0019] In some embodiments, the first control valve and the second control valve are both butterfly valves.

[0020] In some embodiments, it also includes:

[0021] A striking device is provided on the outside of the weighing bin and is used for striking the weighing bin.

[0022] In some embodiments, the weighing bin is in an inverted bell shape; the striking device includes a gravity pendulum and a pendulum driver connected to the gravity pendulum for providing kinetic energy to the gravity pendulum; the gravity pendulum is constructed to fit exactly or be close to the outer wall of the weighing bin when it is naturally suspended under the action of gravity.

[0023] In some embodiments, the striking device further includes an active paddle and a driven paddle; the active paddle and the driven paddle are both hinged to the weighing bin with a fixed axis, the hinge axes of the active paddle and the driven paddle are parallel to each other, and the swing ranges of the active paddle and the driven paddle partially overlap; the pendulum driver is connected to the hinge axis of the active paddle; one end of the driven paddle is fixed to the hammer tail of the gravity pendulum.

[0024] In some embodiments, the weighing device further comprises:

[0025] A feeding calculation unit connected to the weighing end and used to calculate the actual feeding amount according to two weighing data of the weighing end before and after the weighing bin is fed downward;

[0026] A judgment unit connected to the feeding calculation unit and used to judge whether the actual feeding amount is less than the preset feeding amount;

[0027] A knocking actuator connected to the judgment unit is used to drive the knocking device to act when the actual feeding amount is less than the preset feeding amount.

[0028] The present application also discloses a glass fiber production line, including a kiln, a silo and the above-mentioned kiln feeding device; the silo is located below the weighing bin, and the lower end of the weighing bin is connected to the entrance of the silo through a second control valve; a continuous feeding mechanism is provided between the silo and the kiln.

[0029] Compared with the above-mentioned background technology, the kiln feeding device provided in the present application includes a feeding assembly and a second control valve; the feeding assembly includes a weighing bin capable of vertically dropping materials, a flexible connection sleeve that is air-permeable and impermeable to materials, a weighing device and a first control valve, the two flexible connection sleeves are respectively connected to the upper and lower ends of the weighing bin along the dropping trajectory of the weighing bin, the weighing device includes an installation end that can be fixed in the site and a weighing end connected to the weighing bin and capable of weighing the feeding assembly; the first control valve is arranged above the lower flexible connection sleeve, for controlling the material to flow out of the corresponding flexible connection sleeve; the second control valve is arranged above the upper flexible connection sleeve, for controlling the material to enter the corresponding flexible connection sleeve.

[0030] The kiln feeding device provided in the present application can use a weighing device to accurately weigh the feeding assembly, which is conducive to accurately and reliably recording, analyzing and regulating material usage, and ensuring the stability and uniformity of the feeding amount; the kiln feeding device provided in the present application can use a soft connecting sleeve to quickly connect upstream and downstream equipment. The flexibility and breathability of the soft connecting sleeve can make the entire feeding assembly independent of other equipment in the system, thereby ensuring the weighing accuracy of the weighing device, and is conducive to improving the installation characteristics and maintenance characteristics of the kiln feeding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of the structure of a kiln charging device provided in an embodiment of the present application;

[0033] Figure 2 for Figure 1 A partial enlarged view of point A.

[0034] Among them, 01- silo, 1- feeding assembly, 11- weighing bin, 12- soft connection sleeve, 13- weighing end, 14- first control valve, 15- first mounting plate, 2- second control valve, 3- knocking device, 31- gravity pendulum, 32- pendulum driver, 33- active paddle, 34- driven paddle, 35- articulated shaft, 36- paddle mounting seat, 4- first pipeline, 5- second pipeline, 6- third pipeline, 7- second mounting plate. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] Please refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of a kiln charging device provided in an embodiment of the present application; Figure 2 for Figure 1 A partial enlarged view of point A.

[0038] Please refer to Figure 1 The present application provides a kiln feeding device, comprising a feeding assembly 1 and a second control valve 2; the aforementioned feeding assembly 1 comprises a weighing bin 11 capable of vertically dropping materials, a gas-permeable but material-impermeable flexible connection sleeve 12, a first control valve 14 and a weighing device capable of weighing the feeding assembly 1; in the aforementioned feeding assembly 1, two flexible connection sleeves 12 are respectively arranged at the upper and lower ends of the weighing bin 11, and the two flexible connection sleeves 12 are connected to the weighing bin 11 along the dropping trajectory of the weighing bin 11, the weighing device comprises an installation end that can be fixed in the site and a weighing end 13 connected to the weighing bin 11 and capable of weighing the feeding assembly 1, the first control valve 14 is arranged above the lower flexible connection sleeve 12, and is used to control the material to flow out of the corresponding flexible connection sleeve 12; the second control valve 2 is arranged above the upper flexible connection sleeve 12, and is used to control the material to enter the corresponding flexible connection sleeve 12.

[0039] In this embodiment, the second control valve 2, the weighing bin 11, the weighing device and the first control valve 14 are distributed from top to bottom in sequence. The material can enter the weighing bin 11 under its own weight, and then flow out downward by gravity after being weighed in the weighing bin 11.

[0040] In this embodiment, the weighing device can be fixedly installed at a specific position in the venue through the installation end, and the weighing device can weigh the feeding assembly 1 through the weighing end 13 to obtain the weight of the feeding assembly 1 and the material therein. The above-mentioned installation method of the weighing device can not only realize the positioning installation of the weighing device, but also serve as the installation basis for the remaining components in the feeding assembly 1.

[0041] In this embodiment, a soft connection sleeve 12 and a second control valve 2 are provided at the upper end of the weighing bin 11, and a soft connection sleeve 12 and a first control valve 14 are provided at the lower end of the weighing bin 11; the two soft connection sleeves 12 can connect the weighing bin 11 to the upstream and downstream equipment of the feeding assembly 1, and the first control valve 14 and the second control valve 2 can control the material to enter and exit the weighing bin 11. The soft connection sleeve 12 can form a channel for the feeding assembly 1 and its upstream and downstream equipment for the flow of materials; the soft connection sleeve 12 is air-permeable but not material-permeable, and can be made of soft and breathable materials, which can not only release the air pressure in the feeding assembly 1 in time, but also can be combined with a weighing device to make the entire feeding assembly 1 independent of the feeding system where the feeding assembly 1 is located, so as to achieve the purpose of independent weighing and improve the weighing accuracy.

[0042] When the first control valve 14 and the second control valve 2 are used to control the material entering and exiting the weighing bin 11, if the second control valve 2 is opened, the upstream equipment of the feeding component 1 can transport materials to the weighing bin 11, thereby increasing the amount of materials in the weighing bin 11; if the second control valve 2 is closed, the upstream equipment of the feeding component 1 stops transporting materials to the weighing bin 11; if the first control valve 14 is opened, the weighing bin 11 can transport materials to the downstream equipment of the feeding component 1; if the second control valve 2 is closed, the weighing bin 11 stops transporting materials to the downstream equipment of the feeding component 1.

[0043] The kiln charging device provided in the present application can use the soft connection sleeve 12 to quickly connect the upstream and downstream equipment, which can not only ensure that the weighing device can accurately and reliably weigh the materials inside it, but also help to improve the installation characteristics and maintenance characteristics of the kiln charging device. For example, the operator can easily and conveniently install the kiln charging device between various equipment that need to accurately measure the material dosage and its upstream equipment, and can also easily and conveniently disassemble and clean the kiln charging device from between the aforementioned two equipments; the kiln charging device provided in the present application can use the weighing device to weigh the charging assembly 1, and accurately obtain the weight of the charging assembly 1 and the material inside it. Of course, the weighing device also serves as the installation basis of the entire charging assembly 1, which is conducive to ensuring the weighing accuracy, and can also be combined with the soft connection sleeve 12 to make the kiln charging device have good installation characteristics and maintenance characteristics; the kiln charging device provided in the present application can be set in the transportation path of various production lines that need to transport materials, and can accurately weigh materials, which is conducive to the aforementioned transportation path to accurately and reliably record, analyze and regulate the material dosage, and ensure the stability and uniformity of the feeding amount.

[0044] The kiln charging device provided in the present application is further described below in conjunction with the accompanying drawings and implementation methods.

[0045] For reference Figure 1 In some embodiments, the weighing device includes not only a mounting end and a weighing end 13, but also a net weight calculation unit and a weighing display unit; wherein the net weight calculation unit is connected to the weighing end 13 and is used to calculate the net weight of the material in the weighing bin 11 according to the measured value of the weighing end 13 and the equipment net weight of the feeding assembly 1, and the weighing display unit is connected to the net weight calculation unit and is used to display the net weight of the material. It can be seen that in this embodiment, the weighing end 13 can obtain the weight of the feeding assembly 1 and the material therein, and the net weight calculation unit and the weighing display unit can both obtain the net weight of the material in the feeding assembly 1, which is convenient for the operator to intuitively understand the required operating parameters in the production line where the kiln feeding device is located.

[0046] In the above embodiment, the net weight calculation unit mainly includes a logic controller, and the weighing display unit mainly includes a display screen.

[0047] In some embodiments, the kiln feeding device provided in the present application also includes a spiral metering and feeding mechanism, which is arranged upstream of the feeding component 1 and is used to feed materials to the feeding component 1. For example, the outlet of the spiral metering and feeding mechanism is connected to the upper flexible connection sleeve 12 through the second control valve 2. When the second control valve 2 is opened, the spiral metering and feeding mechanism feeds materials to the feeding component 1.

[0048] When the spiral metering and feeding mechanism is used to feed materials to the feeding component 1, the spiral metering and feeding mechanism can continuously transport materials and can also roughly measure the amount of materials transported to the feeding component 1, thereby providing a guarantee for the feeding component 1 to accurately weigh the materials.

[0049] In some of the embodiments provided above, the weighing device may include a cantilever beam weighing sensor, and the mounting end and the weighing end 13 are both provided on the cantilever beam weighing sensor. In other words, the cantilever beam weighing sensor includes at least two ends, the mounting end and the weighing end 13. The mounting end of the cantilever beam weighing sensor may be provided on a fixed frame or a wall, so as to provide support for the feeding assembly 1 and weigh the material introduced into the symmetrical weighing bin 11 at the same time.

[0050] In some of the embodiments provided above, both the first control valve 14 and the second control valve 2 are butterfly valves. The first control valve 14 and the second control valve 2 can be configured as pneumatic butterfly valves, each of which includes a reversible valve plate. When the pneumatic butterfly valve is opened, the valve plate is reversed to allow materials to pass quickly. For example, when the valve plate of the first control valve 14 is reversed and opened, the materials in the weighing bin 11 can quickly leave the weighing bin 11 and enter the equipment downstream of the weighing bin 11.

[0051] For reference Figure 1 and Figure 2 In some embodiments, the kiln charging device provided by the present application further includes a knocking device 3 for knocking the weighing bin 11. Usually, the knocking device 3 is arranged on the outside of the weighing bin 11, and can knock the outer wall of the weighing bin 11 to make the material attached to the weighing bin 11 fall off from the weighing bin 11, and make the material in the weighing bin 11 as fully as possible leave the weighing bin 11 after the weighing of the weighing bin 11 is completed.

[0052] The weighing bin 11 is in an inverted bell shape; the striking device 3 includes a gravity pendulum 31 and a pendulum driver 32; the aforementioned pendulum driver 32 is connected to the gravity pendulum 31, and is used to provide kinetic energy to the gravity pendulum 31, so that the gravity pendulum 31 swings around the axis of the gravity pendulum 31; the aforementioned gravity pendulum 31 is constructed so that when it is naturally suspended under the action of gravity, it just fits or is close to the outer wall of the weighing bin 11, that is, when the gravity pendulum 31 is naturally suspended under the action of gravity, the gravity pendulum 31 just fits the outer wall of the weighing bin 11 or is separated and close to the outer wall of the weighing bin 11, and when the pendulum driver 32 provides kinetic energy to the gravity pendulum 31, the gravity pendulum 31 swings around its own axis and strikes the outer wall of the weighing bin 11, so that the residual material adhering to the weighing bin 11 is shaken off, thereby reducing the waste of materials.

[0053] In addition, the above-mentioned knocking device 3 may also include an active paddle 33 and a driven paddle 34; the pendulum driver 32 is connected to the active paddle 33, and can drive the active paddle 33 to swing; the active paddle 33 is transmission-connected with the driven paddle 34, and when the active paddle 33 swings, it can drive the driven paddle 34 to swing; the driven paddle 34 is connected to the gravity pendulum 31, so the active paddle 33 can drive the gravity pendulum 31 to swing through the driven paddle 34, so that the gravity pendulum 31 knocks the weighing bin 11.

[0054] In the above-mentioned striking device 3, the pendulum driver 32 may include a motor, which drives the active paddle 33 to rotate. When the active paddle 33 rotates, it pushes the driven paddle 34 to move toward the side close to the weighing bin 11, thereby causing the hammer head to move toward the side away from the weighing bin 11; and when the active paddle 33 is separated from the driven paddle 34, the hammer head falls back under the action of gravity, producing a striking effect on the symmetrical weighing bin 11.

[0055] In the above-mentioned striking device 3, the pendulum driver 32 is connected to the hinge shaft 35 of the active paddle 33, and can drive the active paddle 33 to swing around its hinge shaft 35; the gravity pendulum 31 includes a hammer head and a hammer tail, one end of the driven paddle 34 is fixedly connected to the hammer tail of the gravity pendulum 31, and the axis of the gravity pendulum 31 is also the hinge shaft 35 of the driven paddle 34. When the active paddle 33 contacts and pushes the driven paddle 34 to swing, the driven paddle 34 drives the gravity pendulum 31 to swing; the hinge shafts 35 of the active paddle 33 and the driven paddle 34 are parallel to each other and are hinged to the weighing bin 11 with fixed axes, and the swing ranges of the active paddle 33 and the driven paddle 34 partially overlap. When the active paddle 33 swings around its own hinge shaft 35, it can contact and push the driven paddle 34 to move synchronously, thereby transmitting power to the driven paddle 34 and making the driven paddle 34 swing around its own hinge shaft 35.

[0056] On the basis of the above embodiment, the weighing device also includes a feeding calculation unit, a judgment unit and a knocking actuator; the aforementioned feeding calculation unit is connected to the weighing end 13, and is used to calculate the actual feeding amount based on the two weighing data of the weighing end 13 before and after the weighing bin 11 feeds downward; the aforementioned judgment unit is connected to the feeding calculation unit, and is used to judge whether the actual feeding amount is less than the preset feeding amount; the aforementioned knocking actuator is connected to the judgment unit, and is used to drive the knocking device 3 to operate when the actual feeding amount is less than the preset feeding amount.

[0057] In the above embodiment, the embodiment uses the feeding calculation unit to obtain two weighing data before and after the weighing bin 11 feeds downward. Obviously, the difference between the two weighing data before and after the weighing bin 11 feeds downward is the actual feeding amount of the weighing bin 11. The judgment unit is then used to compare and analyze whether the actual feeding amount is less than the preset feeding amount. When the actual feeding amount is less than the preset feeding amount, the judgment unit controls the operation of the knocking actuator to drive the knocking device 3 to act.

[0058] In the above embodiment, the knocking actuator operates when the actual feeding amount of the weighing bin 11 is less than the preset feeding amount, so that the material in the weighing bin 11 is moved out of the weighing bin 11 as fully as possible; on the contrary, when the actual feeding amount of the weighing bin 11 is not less than the preset feeding amount, the knocking actuator can stop moving. The above-mentioned operation method is particularly suitable for the knocking actuator with a gravity pendulum 31: the gravity pendulum 31 swings under the drive of the pendulum driver 32 and the action of gravity, which causes the gravity pendulum 31 to swing multiple times in a single working cycle, affecting the weighing operation of the feeding component 1. For this reason, when the actual feeding amount is less than the preset feeding amount, the feeding calculation unit, the judgment unit and the knocking actuator will control the movement of the knocking actuator and its gravity pendulum 31, and knock the weighing bin 11 through the gravity pendulum 31 to make the material in the weighing bin 11 as fully as possible.

[0059] Of course, the data obtained by the feeding calculation unit and the judgment unit can also be used to feedback control the operating parameters of the equipment upstream of the feeding component 1. For example, a spiral metering and feeding mechanism is provided upstream of the feeding component 1, and the data obtained by the feeding calculation unit and the judgment unit can be used to control the start and stop of the spiral metering and feeding mechanism. The purpose of using the aforementioned spiral metering and feeding mechanism in combination with the aforementioned weighing device is to use the spiral metering and feeding mechanism to roughly adjust the amount of material delivered to the weighing device and to use the weighing device to accurately analyze the amount of material fed into the downstream equipment.

[0060] For reference Figure 1 On the basis of the embodiments provided above, the present application further discloses a glass fiber production line, comprising a kiln, a silo 01 and a kiln feeding device; in the glass fiber production line, materials are transported in sequence along the kiln feeding device, the silo 01 and the kiln. Usually, the silo 01 is arranged below the weighing silo 11, and the lower end of the weighing silo 11 is connected to the entrance of the silo 01 through the second control valve 2. When the second control valve 2 is opened, the material in the weighing silo 11 can be fed into the silo 01 under the action of its own weight; the silo 01 is arranged upstream of the kiln, and a continuous feeding mechanism is provided between the silo 01 and the kiln, and the material entering the silo 01 can be transported to the kiln by the continuous feeding mechanism.

[0061] In the above embodiment, a continuous feeding mechanism is provided between the silo 01 and the kiln, and can continuously feed materials to the kiln; the aforementioned continuous feeding mechanism may include a screw conveying device. The aforementioned screw conveying device and the screw metering feeding mechanism in some of the above embodiments may adopt the same structure, and both are used to continuously transport materials to downstream equipment. The aforementioned operating characteristics of the screw conveying device and the screw metering feeding mechanism are suitable for the material transportation requirements of the location, but are not conducive to accurately obtaining the amount of material fed into the kiln, so the present application sets a kiln feeding device between the two. Between the screw conveying device and the screw metering feeding mechanism that continuously transport materials, the kiln feeding device can weigh the incoming materials in batches, so that the operator can accurately know the amount of materials transported to the downstream equipment, avoid the problem of unstable and uneven feeding amount in the downstream equipment, ensure the accuracy of each feeding amount, and reduce errors.

[0062] For reference Figure 1 and Figure 2 In the above embodiment, a knocking device 3 may also be provided on the peripheral side of the silo 01, such as Figure 1As shown, multiple knocking devices 3 are arranged on the periphery of the weighing bin 11 and the silo 01. In addition, a first mounting plate 15 can be arranged above the weighing bin 11, and multiple knocking devices 3 are installed on the periphery of the weighing bin 11 through the first mounting plate 15; a paddle mounting seat 36 is arranged on the first mounting plate 15, and a driven paddle 34 and a gravity pendulum 31 are installed on the first mounting plate 15 through the paddle mounting seat 36; rigid first pipes 4 and second pipes 5 are arranged at both ends of the upper flexible connection sleeve 12, and a third pipe 6 is arranged at the lower end of the lower flexible connection sleeve 12; a second mounting plate 7 can be arranged above the silo 01, and multiple knocking devices 3 are installed on the periphery of the silo 01 through the second mounting plate 7.

[0063] The above is a detailed introduction to the glass fiber production line and kiln feeding device provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A kiln charging device, characterized in that: The invention comprises a feeding component (1), wherein the feeding component (1) comprises: A weighing bin (11) capable of vertically dropping materials; A flexible connection sleeve (12) that is air-permeable but material-impermeable; the two flexible connection sleeves (12) are respectively connected to the upper and lower ends of the weighing bin (11) along the material drop track of the weighing bin (11); A weighing device; the weighing device comprises a mounting end that can be fixedly mounted in a site and a weighing end (13) connected to the weighing bin (11) and capable of weighing the feeding assembly (1); A first control valve (14); the first control valve (14) is disposed above the lower flexible connection sleeve (12) and is used to control the flow of materials out of the flexible connection sleeve (12); Also includes: A second control valve (2); the second control valve (2) is arranged above the upper flexible connection sleeve (12) and is used to control the material from entering the flexible connection sleeve (12).

2. The kiln charging device according to claim 1, characterized in that: The weighing device also includes: a net weight calculation unit connected to the weighing end (13) and used to calculate the net weight of the material in the weighing bin (11) according to the measurement value of the weighing end (13) and the equipment net weight of the feeding assembly (1); A weighing display unit connected to the net weight calculation unit and used to display the net weight of the material.

3. The kiln charging device according to claim 1, characterized in that: It also comprises a spiral metering and feeding mechanism; the outlet of the spiral metering and feeding mechanism is connected to the upper soft connection sleeve (12) through the second control valve (2).

4. The kiln charging device according to claim 1, characterized in that: The weighing device comprises a cantilever beam weighing sensor; the mounting end and the weighing end (13) are both arranged on the cantilever beam weighing sensor.

5. The kiln charging device according to claim 1, characterized in that: The first control valve (14) and the second control valve (2) are both butterfly valves.

6. The kiln charging device according to any one of claims 1 to 5, characterized in that: Also includes: A knocking device (3) is arranged on the outside of the weighing bin (11) and is used for knocking the weighing bin (11).

7. The kiln charging device according to claim 6, characterized in that: The weighing bin (11) is in the shape of an inverted bell; the striking device (3) comprises a gravity pendulum (31) and a pendulum driver (32) connected to the gravity pendulum (31) and used to provide kinetic energy to the gravity pendulum (31); the gravity pendulum (31) is constructed so as to fit exactly against or be in close proximity to the outer wall of the weighing bin (11) when it is naturally suspended under the action of gravity.

8. The kiln charging device according to claim 7, characterized in that: The striking device (3) further comprises an active paddle (33) and a driven paddle (34); the active paddle (33) and the driven paddle (34) are both fixedly hinged to the weighing bin (11); the hinge axes of the active paddle (33) and the driven paddle (34) are parallel to each other; the swing ranges of the active paddle (33) and the driven paddle (34) partially overlap; the pendulum driver (32) is connected to the hinge axis of the active paddle (33); and one end of the driven paddle (34) is fixed to the hammer tail of the gravity pendulum (31).

9. The kiln charging device according to claim 8, characterized in that: The weighing device also includes: A feeding calculation unit connected to the weighing end (13) and used to calculate the actual feeding amount based on two weighing data of the weighing end (13) before and after feeding downward into the weighing bin (11); A judgment unit connected to the feeding calculation unit and used to judge whether the actual feeding amount is less than the preset feeding amount; A knocking actuator connected to the judgment unit and used to drive the knocking device (3) to operate when the actual feeding amount is less than the preset feeding amount.

10. A glass fiber production line, characterized in that: It comprises a kiln, a silo (01) and a kiln feeding device according to any one of claims 1 to 9; the silo (01) is located below the weighing silo (11), and the lower end of the weighing silo (11) is connected to the inlet of the silo (01) through the second control valve (2); a continuous feeding mechanism is provided between the silo (01) and the kiln.

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