A precision coated needle felt air chute breather plate

Abstract

The utility model discloses a kind of precision coating needle felt air chute air-permeable plate, including coating layer, base layer and product service life wear mark, the coating layer is coated in the one side of the base layer, the service life wear mark is embedded in the base layer.The precision coating needle felt air chute air-permeable plate of the utility model is good, processing is easy, and does not need heat sealing edge or punching;Needle felt air slide plate breathes evenly, and service life will be extended because there is no frayed edge problem of yarn.

Description

Technical Field

[0001] This utility model belongs to the field of powder conveying materials technology, and more specifically, relates to a precision coated needle-punched felt air chute permeable plate. Background Technology

[0002] Currently, most commonly used conveying equipment in the cement industry for transporting dry powdery materials such as cement, raw meal powder, and fly ash is pneumatic conveying equipment. Its main working principle is to keep the material in the closed conveying chute fluidized and allow it to flow slowly at one end of the chute. The main body of this equipment has no transmission parts, adopts a new type of coated wheel breathable layer, is sealed, easy to operate and manage, lightweight, low power consumption, large conveying force, and easy to change the conveying direction. It not only reduces the footprint and avoids environmental pollution, but also has the advantages of low noise, simple process and low maintenance cost, and is widely used in the field of powder conveying.

[0003] However, during the powder conveying process, prolonged operation causes the powder to repeatedly come into contact with and wear down the internal permeable plate under the impact of airflow. This can easily lead to the permeable plate becoming frayed, fuzzy, and damaged. Furthermore, the existing pneumatic conveying trough cannot replace damaged parts individually; the entire internal structure needs to be replaced, resulting in significant losses and inconvenience in use. Therefore, improvements are needed. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a precision coated needle-punched felt air groove breathable plate with good stiffness, uniform air permeability and long service life.

[0005] Technical solution: The present invention relates to a precision coated needle-punched felt air groove permeable plate, comprising a coating layer, a substrate layer, and a product life wear indicator. The coating layer is applied to one side of the substrate layer, and the life wear indicator is embedded in the substrate layer.

[0006] In some embodiments, the coating layer is a layer of precision silicone gel uniformly applied to one side of the substrate layer by pressure, allowing it to penetrate the surface of the substrate layer.

[0007] In some embodiments, the thickness of the coating layer accounts for 1 / 10 to 1 / 5 of the overall thickness.

[0008] In some embodiments, the coating layer is disposed on the side closer to the direction of airflow.

[0009] In some embodiments, the substrate layer is made of polyester or aramid needle-punched.

[0010] In some implementations, the wear indicator is embedded in the middle of the substrate layer.

[0011] In some embodiments, the wear indicator is located 1-3 mm from the material side.

[0012] In some embodiments, the overall thickness of the breathable panel is 5-8 mm, the weight is 2000-3500 gsm, and the air permeability is 3-5 m. 3 / m 2 / min, breaking strength is 1000-1500N / cm, continuous operating temperature is 100-220℃.

[0013] In some embodiments, the permeable plate is used in pneumatic conveying of materials such as alumina, cement, and fly ash.

[0014] Beneficial effects: The beneficial effects of this utility model are as follows:

[0015] (1) The precision coated needle-punched felt air groove breathable plate of this utility model has good rigidity, is easy to process, and does not require heat sealing or drilling.

[0016] (2) The precision coated needle-punched felt air groove breathable plate of this utility model has uniform air permeability and its service life will be extended because there will be no problem of yarn fraying.

[0017] (3) The advantage of the coating in the breathable plate of this utility model compared with ordinary needle-punched felt is that the air permeability range is more precisely controlled. Even if there is wear during the service life, the air permeability remains basically unchanged. In addition, the coating can prevent clogging.

[0018] (4) The precision coated needle-punched felt air groove vent plate of this utility model has an added red life wear indicator layer, which makes it convenient to judge the wear degree of the vent plate during maintenance and provides guidance information for maintenance and replacement;

[0019] (5) The overall thickness of the air trough permeable plate of this utility model is 5-8mm, the weight is 2000-3500gsm, and the air permeability is 3-5m. 3 / m 2 With a speed of 1000-1500 N / cm and a continuous operating temperature of 100-220℃, it can be widely used in pneumatic conveying of alumina, cement, fly ash and other materials. Attached Figure Description

[0020] Figure 1 This is a front view of the structure of one embodiment of the utility model. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc., which indicate the orientation or positional relationship shown, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0025] Example 1

[0026] like Figure 1 As shown, a precision coated needle-punched felt air groove permeable plate includes a coating layer 1, a substrate layer 2, and a product life wear indicator 3. The coating layer 1 is coated on one side of the substrate layer 2, and the life wear indicator 3 is embedded in the substrate layer 2.

[0027] like Figure 1 As shown, the permeable plate is installed in the pneumatic conveying trough, with the side having the coating layer 1 installed near the air trough and the side without the coating layer 1 installed near the material trough.

[0028] In this embodiment, the matrix layer 2 is preferably made of polyester needle-punched fiber. Polyester fiber has very high strength; the strength of short fibers is 2.6–5.7 cN / dtex, and that of high-strength fibers is 5.6–8.0 cN / dtex. This makes polyester fiber's impact resistance 4 times higher than nylon and 20 times higher than viscose fiber. Polyester is produced by melt spinning and is a thermoplastic fiber with a higher melting point than ordinary fibers, thus exhibiting excellent heat resistance. Polyester's abrasion resistance is second only to nylon and better than other natural and synthetic fibers, making it less prone to wear during long-term use.

[0029] In this embodiment, the coating layer 1 is a layer of precision silicone gel uniformly applied to one side of the substrate layer 2 by pressure, allowing it to penetrate the surface of the substrate layer 2. One function of the coating layer 1 is to enhance the overall rigidity of the breathable board, providing good support; another function is to provide excellent air permeability. Compared with ordinary needle-punched felt, the coating in this invention offers advantages such as more precise control of the air permeability range. Even with wear during its lifespan, the air permeability remains essentially unchanged. Furthermore, the coating prevents clogging. Simultaneously, because the coating layer is made of precision silicone gel, it effectively prevents the penetration of dirt and dust.

[0030] More preferably, the thickness of the coating layer 1 accounts for 1 / 10 to 1 / 5 of the overall thickness. A suitable thickness selection can provide good support strength and breathability.

[0031] In this embodiment, as Figure 1 As shown, the side with coating layer 1 is installed near the air trough, and the side without coating layer 1 is installed near the material trough. During pneumatic conveying, powder enters the material trough inside the conveying tank body, while airflow also enters the air trough inside the conveying tank body. The airflow in the air trough passes through a permeable plate into the material trough, causing the powder in the material trough to flow and be conveyed under the action of the airflow. However, during the conveying process, the powder is easily rubbed against the surface of the permeable plate due to the impact force of the airflow, which can easily lead to wear and tear on the permeable plate. Therefore, the permeable plate has a limited lifespan and needs to be replaced periodically.

[0032] In this embodiment, as Figure 1 As shown, the wear indicator 3 is embedded in the middle of the substrate layer 2, and the distance between the wear indicator 3 and the material side is 1-3mm. The wear indicator 3 is a bright color, such as red. The function of the wear indicator 3 is to provide a wear warning; when the surface of the ventilated plate wears down to this wear indicator 3, it indicates that the ventilated plate needs to be replaced.

[0033] In this embodiment, the breathable board made of polyester matrix has an overall thickness of 5-8mm, a basis weight of 2000-3500gsm, and a breathability of 3-5m.3 / m 2 With a speed of 1000-1500 N / cm and a tensile strength of 1000-1500 N / cm, the continuous operating temperature is 100-130℃, and the maximum operating temperature can reach 150℃. It can be widely used in pneumatic conveying of alumina, cement, fly ash powder and other materials.

[0034] The preparation method of the above-mentioned precision coated needle-punched felt air groove permeable plate includes the following steps:

[0035] S1. First, the pre-punched felt required for the base layer is produced on the needle punching production line. The pre-punched felt structure consists of two layers of fiber web and a middle layer of base fabric, with a basis weight of 300-400g. The fiber web is composed of fibers of different fineness from 2D to 15D.

[0036] S2. The pre-punched felt is repeatedly needled layer by layer on a heavy-duty needle punching machine. Pre-punched felt with wear indicators is placed as centrally as possible in the base layer. The base layer consists of 4-6 layers of pre-punched felt, depending on the weight and thickness of the breathable plate. It is formed by repeated needle punching at a frequency of 600 rpm and 800 needles / m. 2 The needle-punch density controls the hardness and breathability of the breathable plate;

[0037] S3. After the base layer is needled, heat setting and singeing are required.

[0038] S4. After the substrate layer is shaped and singed, the coating layer is produced by pressure coating equipment. At the same time, the precision organic silicone gel is cured by infrared heating at 180℃, so that it can better bond with the substrate layer.

[0039] S5. After the base layer is coated, the coating layer is polished with a polishing machine to ensure that the air in the air chute can pass through the air permeable plate more easily and to ensure the required stable air permeability.

[0040] Example 2

[0041] A precision coated needle-punched felt air groove permeable plate includes a coating layer 1, a substrate layer 2, and a product life wear indicator 3. The coating layer 1 is coated on one side of the substrate layer 2, and the life wear indicator 3 is embedded in the substrate layer 2.

[0042] like Figure 1 As shown, the permeable plate is installed in the pneumatic conveying trough, with the side having the coating layer 1 installed near the air trough and the side without the coating layer 1 installed near the material trough.

[0043] In this embodiment, the substrate layer 2 is preferably made of aramid needle-punched fiber. Aramid has extremely high tensile strength, five times that of steel and six times that of glass, while being very lightweight, even lighter than cotton. This lightweight and high-strength characteristic gives aramid a significant advantage in products requiring both lightweight and high strength. Aramid has excellent abrasion resistance, much higher than common natural fibers such as cotton and linen, and can resist the erosion of most chemicals, thus extending its service life. Aramid can withstand high temperatures and maintain stable performance at high temperatures. Its limiting oxygen index is greater than 28, and it extinguishes itself upon removal from a flame, exhibiting excellent flame-retardant properties.

[0044] In this embodiment, the coating layer 1 is a layer of precision silicone gel uniformly applied to one side of the substrate layer 2 by pressure, allowing it to penetrate the surface of the substrate layer 2. One function of the coating layer 1 is to enhance the overall rigidity of the breathable board, providing good support; another function is to provide excellent air permeability. Compared with ordinary needle-punched felt, the coating in this invention offers advantages such as more precise control of the air permeability range. Even with wear during its lifespan, the air permeability remains essentially unchanged. Furthermore, the coating prevents clogging. Simultaneously, because the coating layer is made of precision silicone gel, it effectively prevents the penetration of dirt and dust.

[0045] More preferably, the thickness of the coating layer 1 accounts for 1 / 10 to 1 / 5 of the overall thickness. A suitable thickness selection can provide good support strength and breathability.

[0046] In this embodiment, the side with coating layer 1 is installed near the air trough, and the side without coating layer 1 is installed near the material trough. During pneumatic conveying, the powder enters the material trough inside the conveying tank body, while airflow also enters the air trough inside the conveying tank body. The airflow in the air trough passes through a permeable plate into the material trough, causing the powder in the material trough to flow and be conveyed under the action of the airflow. However, during the conveying process, the powder is easily rubbed against the surface of the permeable plate due to the impact force of the airflow, which can easily lead to wear and tear on the permeable plate. Therefore, the permeable plate has a limited lifespan and needs to be replaced periodically.

[0047] In this embodiment, the wear indicator 3 is embedded in the middle of the substrate layer 2, and the distance between the wear indicator 3 and the material side is 1-3mm. The wear indicator 3 is a bright color, such as red. The function of the wear indicator 3 is to provide a wear reminder; when the surface of the ventilated plate wears down to the wear indicator 3, it indicates that the ventilated plate needs to be replaced.

[0048] In this embodiment, the aramid-based breathable sheet has an overall thickness of 5-8 mm, a basis weight of 2000-3500 gsm, and an air permeability of 3-5 m. 3 / m2 With a speed of 1000-1500 N / cm and a tensile strength of 1000-1500 N / cm, the continuous operating temperature is 100-200℃, and the maximum operating temperature can reach 220℃. It can be widely used in pneumatic conveying of alumina, cement, fly ash powder and other materials.

[0049] The preparation method of the above-mentioned precision coated needle-punched felt air groove permeable plate includes the following steps:

[0050] S1. First, the pre-punched felt required for the base layer is produced on the needle punching production line. The pre-punched felt structure consists of two layers of fiber web and a middle layer of base fabric, with a basis weight of 300-400g. The fiber web is composed of fibers of different fineness from 2D to 15D.

[0051] S2. The pre-punched felt is repeatedly needled layer by layer on a heavy-duty needle punching machine. The pre-punched felt with wear indicators is placed in the middle of the base layer as much as possible. The base layer consists of 4-6 layers of pre-punched felt, depending on the weight and thickness of the different breathable plates. It is formed by repeated needle punching using a needle punching process, with a needle punching frequency of 800 rpm and 1200 needles / m. 2 The needle-punch density controls the hardness and breathability of the breathable plate;

[0052] S3. After the base layer is needled, heat setting and singeing are required.

[0053] S4. After the substrate layer is shaped and singed, the coating layer is produced by pressure coating equipment. At the same time, the precision organic silicone gel is cured by infrared heating at a temperature of 260℃, so that it can better bond with the substrate layer.

[0054] S5. After the base layer is coated, the coating layer is polished with a polishing machine to ensure that the air in the air chute can pass through the air permeable plate more easily and to ensure the required stable air permeability.

[0055] This utility model's precision coated needle-punched felt air groove permeable plate has good rigidity, is easy to process, and does not require heat sealing or drilling; the needle-punched felt permeable plate has uniform air permeability and its service life will be extended because there will be no problem of yarn fraying.

[0056] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A precision coated needle-punched felt air groove permeable plate, characterized in that: It includes a coating layer (1), a substrate layer (2), and a product life wear indicator (3). The coating layer (1) is applied to one side of the substrate layer (2), and the life wear indicator (3) is embedded in the substrate layer (2).

2. The precision coated needle-punched felt air groove permeable plate according to claim 1, characterized in that: The coating layer (1) is a layer of precision silicone gel uniformly applied to one side of the substrate layer (2) by pressure, so that it penetrates the surface of the substrate layer (2).

3. The precision coated needle-punched felt air groove permeable plate according to claim 2, characterized in that: The thickness of the coating layer (1) accounts for 1 / 10 to 1 / 5 of the overall thickness.

4. The precision coated needle-punched felt air groove permeable plate according to claim 3, characterized in that: The coating layer (1) is located on the side closer to the direction of air flow.

5. The precision coated needle-punched felt air groove permeable plate according to claim 1, characterized in that: The substrate layer (2) is made of polyester or aramid needle punch.

6. The precision coated needle-punched felt air groove permeable plate according to claim 1, characterized in that: The wear indicator (3) is embedded in the middle of the substrate layer (2).

7. The precision coated needle-punched felt air groove permeable plate according to claim 6, characterized in that: The wear indicator (3) is 1-3 mm away from the material side.

8. The precision coated needle-punched felt air groove permeable plate according to claim 1, characterized in that: The overall thickness of the breathable panel is 5-8mm, the weight is 2000-3500gsm, and the air permeability is 3-5m. 3 / m 2 / min, breaking strength is 1000-1500N / cm, continuous operating temperature is 100-220℃.

9. The precision coated needle-punched felt air groove permeable plate according to any one of claims 1-8, characterized in that: Application of this permeable plate in pneumatic conveying of alumina, cement, and fly ash powder.

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