Automatic control vibrating screen discharging pneumatic gate valve
By designing an automatically controlled pneumatic gate for the discharge of vibrating screens, many shortcomings of existing manual gates have been resolved. This enables timed opening and closing and remote control without human intervention, improving production efficiency and automation levels, protecting the screen and downstream equipment, ensuring product quality stability, and adapting to the needs of various vibrating screen equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-05
- Publication Date
- 2026-04-14
AI Technical Summary
The existing manual gate at the discharge port of vibrating screen suffers from problems such as high dependence on manual labor, low production efficiency, unstable product quality, large equipment wear and tear, high maintenance costs, and poor adaptability, which cannot meet the needs of modern industrial automation and continuous production.
Design an automatically controlled pneumatic gate for the discharge of a vibrating screen. The gate body is driven by a cylinder and works with a PLC controller and a time relay to realize the automatic opening and closing of the gate at a set time. Combined with a remote communication module, it can be remotely controlled. The gate is installed on the outside of the screen frame and inside the slag discharge port to avoid direct contact with the screen mesh, and is equipped with a sealing component to ensure airtightness.
It enables timed start-up and shutdown without manual intervention, improving production efficiency and continuity, reducing labor intensity and maintenance costs, ensuring screening accuracy and product quality stability, adapting to different types and specifications of vibrating screen equipment, and reducing equipment wear and modification costs.
Smart Images
Figure CN121847446A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of vibrating screen auxiliary equipment technology, specifically to an automatically controlled pneumatic gate for discharging material from a vibrating screen. Background Technology
[0002] Vibrating screens, as commonly used material screening equipment, are widely used in mining, chemical, food, and pharmaceutical industries. Their main function is to separate materials of different particle sizes through vibration to meet the requirements of subsequent production processes. The discharge gate is a key component of the vibrating screen, used to control the discharge of materials, slag removal, and material flow regulation during the screening process, directly affecting screening efficiency, product quality, and production continuity.
[0003] Currently, the discharge gates of existing vibrating screens generally adopt a manual built-in gate structure. There are two main installation methods: one is to install the gate at the discharge port and the screen frame, and the other is to install the gate on the inner ring of the screen frame and on top of the screen mesh. However, this type of manual built-in gate has many defects in actual use, seriously affecting production efficiency and product quality, as follows:
[0004] First, it relies heavily on manual operation and is labor-intensive. When multiple vibrating screens are working simultaneously, dedicated operators are needed to manually open and close the gates of each device to achieve slag discharge or simultaneous screening and discharge. This not only consumes a lot of human resources but also increases the company's labor costs.
[0005] Secondly, production efficiency is low, and automated continuous production cannot be achieved. When using the manual gate opening and closing method for slag discharge, multiple steps are required, including stopping the machine, opening the gate, discharging slag, closing the gate, and starting the machine again. The entire process is time-consuming, leading to production interruptions and significantly reducing production efficiency. While the method of opening a small opening for simultaneous screening and discharge does not require stopping the machine, the manually controlled gate opening is difficult to ensure consistency in each operation, which can easily lead to unstable material flow, affecting the uniformity of screening and causing fluctuations in product quality.
[0006] Furthermore, the risk of material blockage is high, increasing equipment maintenance costs. During simultaneous screening and discharge, an unreasonable gate opening can easily lead to material accumulation at the discharge port, causing blockages. This not only requires manual cleaning, affecting production progress, but may also impact the screen and gate structure. At the same time, frequent manual operation over a long period will accelerate the wear of the gate, leading to a decrease in the sealing between the gate and the screen frame, causing material leakage problems, and increasing the frequency and cost of equipment maintenance.
[0007] In addition, the risks of screen breakage and equipment damage are significant. For the gates installed inside the screen frame and on top of the screen, during the operation of the vibrating screen, the gates will continuously rub against the screen due to the vibration of the equipment, easily causing the screen to wear out and resulting in unqualified screening. At the same time, prolonged vibration may also cause the gate's fixing structure to loosen, leading to the gate falling off. A fallen gate can not only break the screen but may also mix into the finished product, causing defective products and even damaging downstream production equipment, resulting in serious economic losses.
[0008] Finally, the existing gates have poor adaptability and versatility, making it difficult to meet the automated production needs of different types and specifications of vibrating screens, and they are not compatible with the automated control systems of modern industrial production, thus limiting the improvement of the enterprise's production intelligence level.
[0009] In summary, existing manual built-in gates for vibrating screens suffer from numerous problems, including high reliance on manual labor, low production efficiency, unstable product quality, high equipment wear and tear, and high maintenance costs. They can no longer meet the requirements of continuous, automated, and efficient production in modern industry. Therefore, developing a vibrating screen discharge gate that can achieve automatic control, is highly adaptable, and is reliable in use has significant practical significance and application value. Summary of the Invention
[0010] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatically controlled pneumatic gate for the discharge of a vibrating screen. The built-in pneumatic gate can effectively solve the above-mentioned defects, realize remote automatic control, improve system stability and operational safety, and adapt to the needs of continuous production.
[0011] To achieve the above objectives, the present invention provides the following technical solution: an automatically controlled pneumatic gate for discharging material from a vibrating screen, comprising a gate body, a drive mechanism, a control module, and a sealing assembly; the gate body is installed on the outside of the screen frame at the discharge port of the vibrating screen and located inside the slag discharge port, and has an arc-shaped structure; the sealing assembly is disposed at the contact point between the gate body and the screen frame outlet; the drive mechanism includes a cylinder, the piston shaft of which is fixedly connected to the gate body; the control module includes a PLC controller and a time relay, the PLC controller being signal-connected to the cylinder, and the time relay being used to set the automatic opening and closing time of the gate body, thereby achieving timed opening and closing without manual intervention.
[0012] Furthermore, the cylinder is a round cylinder or a square cylinder, which uses compressed air to provide driving force to realize the reciprocating linear motion of the piston shaft, thereby driving the gate body to open and close.
[0013] Furthermore, the gate body includes a hinged structure and a hingeless structure. The gate body with the hinged structure is hinged to the screen frame by a hinge, and the hinge is made of stainless steel 304.
[0014] Furthermore, the sealing component is a sealing gasket, which is adapted to the arc-shaped contour of the gate body and fits tightly against the edge of the screen frame outlet to achieve a seal and prevent leakage.
[0015] Furthermore, the drive mechanism also includes a cylinder connector and an internal thread connector, both of which are made of 304 stainless steel. The internal thread connector has a specification of M21×1.25 or 10×1.25.
[0016] Furthermore, the control module also includes a remote communication module, which is connected to the PLC controller for remote control of the gate's opening and closing status and parameter adjustment.
[0017] Furthermore, the gate body is made of 304 stainless steel, and the thickness of the gate body is 1.5-2.0mm, which is suitable for the discharge port size of different specifications of vibrating screens.
[0018] Furthermore, the cylinder model is MMA0X5QSCA (Airtac), U25x5050, or W40x566C (Zhengdeke), and there are two cylinders, symmetrically distributed on both sides of the gate body.
[0019] Furthermore, the vibrating screen includes a standard vibrating screen and an ultrasonic vibrating screen. The ultrasonic vibrating screen is adapted to a third-generation ultrasonic dedicated generator motor with a power of 1.5 kW.
[0020] Furthermore, it also includes an inspection port, which is located on the side of the vibrating screen and has a specification of DN100, for the maintenance and repair of the gate body and drive mechanism.
[0021] Compared with the prior art, the present invention has the following significant advantages:
[0022] (1) Achieve automated control and reduce labor intensity: Through the cooperation of PLC controller and time relay, the gate can be opened and closed automatically at a time without manual intervention. It is especially suitable for scenarios where multiple vibrating screens work at the same time, which greatly reduces the number of operators, reduces labor costs and labor intensity; The setting of remote communication module further improves the ease of operation, realizes remote operation and centralized control, and improves production management efficiency.
[0023] (2) Improve production efficiency and ensure continuous production: The slag discharge or material discharge operation can be completed without stopping the machine, avoiding the production interruption caused by the traditional manual gate shutdown operation, and ensuring the continuity of production; at the same time, the gate opening and closing action responds quickly and the timing control is accurate, effectively shortening the slag discharge time and improving the overall production efficiency.
[0024] (3) Protect the screen and downstream equipment and reduce maintenance costs: The gate body is installed on the outside of the screen frame and inside the slag discharge port, avoiding direct contact with the screen and completely solving the problem of screen wear caused by traditional gates; even if the gate falls off, it will not fall into the screen area or mix into the finished material, avoiding the risk of screen damage, finished material contamination and downstream equipment damage, reducing equipment maintenance frequency and maintenance costs, and extending the service life of the vibrating screen.
[0025] (4) Improve screening accuracy and product quality stability: The sealing component ensures the sealing when the gate is closed, avoiding material leakage; the gate opening is precisely controlled by the cylinder drive, and combined with the personalized setting of the timer switch parameters, the consistency of each operation is guaranteed, avoiding material blockage and unstable flow, and improving the uniformity of screening and product quality stability.
[0026] (5) Strong adaptability and good versatility: The gate body can be customized in size according to different types (standard vibrating screen, ultrasonic vibrating screen) and different specifications of vibrating screens. The cylinder model and connector specifications of the drive mechanism can be flexibly selected. There are two structural forms: hinged and hingeless, which can meet diverse application needs. At the same time, the equipment has a simple structure and is easy to install. It can upgrade and replace the existing manual gate without making major modifications to the original structure of the vibrating screen, thus reducing the equipment upgrade cost for enterprises.
[0027] (6) Reliable structure and long service life: The gate body, cylinder joint, internal thread joint and other key components are all made of stainless steel 304, which has good corrosion resistance, wear resistance and mechanical strength, and can adapt to the vibration environment and material contact requirements when the vibrating screen is working; the cylinder is selected from mature models on the market, and the drive is stable and reliable; the sealing components are made of wear-resistant and aging-resistant rubber, fluororubber or silicone, which ensures the overall reliability and service life of the equipment. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the overall structure of the automatically controlled pneumatic gate for discharging material from a vibrating screen in an embodiment of the present invention.
[0029] Figure 2 This is a circuit block diagram of the control module in an embodiment of the present invention. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.
[0032] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0033] The technical solution of the present invention will be described in detail below through specific embodiments, but the scope of protection of the present invention is not limited thereto. To make the technical solution, objectives, and advantages of the present invention clearer, specific embodiments are described below in conjunction with the appendix. Figure 1 , Figure 2 The present invention will be further described in detail below.
[0034] Example 1
[0035] This embodiment provides an automatically controlled pneumatic discharge gate for a vibrating screen, compatible with standard vibrating screens, and its specific structure is as follows:
[0036] The gate body 1 is made of 304 stainless steel with a thickness of 1.5mm and has an arc-shaped structure to fit the discharge port size of the standard vibrating screen. The gate body 1 is a hingeless structure driven by two symmetrically distributed circular cylinders 2. The cylinders 2 are model MMA0X5QSCA Airtac, and the piston shafts 3 of the cylinders 2 are welded and fixed to the gate body 1. The drive mechanism also includes two cylinder connectors 8 and two internal thread connectors 9. The internal thread connectors 9 are M21×1.25 and are all made of 304 stainless steel. The sealing component is a rubber sealing gasket 6 adapted to the arc-shaped contour of the gate body 1 and is set at the contact point between the gate body 1 and the outlet of the screen frame 4. The control module includes a PLC controller 10, a time relay 11, and a remote communication module 12. The PLC controller 10 is model S7-200 SMART, and the remote communication module 12 is a 4G module to realize remote control. A DN100 inspection port 13 is set on the side of the vibrating screen.
[0037] In this embodiment, the pneumatic gate is installed outside the screen frame 4 at the discharge port of a standard vibrating screen and inside the slag discharge port 5. During operation, the operator remotely sets the gate to open automatically three times a day, with each opening lasting 30 seconds, for slag discharge. The PLC controller 10, based on the set signal from the time relay 11, controls the cylinder 2 to supply compressed air, pushing the piston shaft 3 to extend and opening the gate body 1. After slag discharge, the cylinder 2 exhausts air, the piston shaft 3 retracts, the gate body 1 closes, and the sealing gasket 6 achieves a leak-proof seal. The entire process requires no manual intervention, significantly reducing labor intensity and improving production efficiency.
[0038] Example 2
[0039] This embodiment provides an automatically controlled pneumatic discharge gate for a vibrating screen, adapted to an ultrasonic vibrating screen. This ultrasonic vibrating screen is equipped with a third-generation ultrasonic dedicated generator motor with a power of 1.5 kW. The specific structure is as follows:
[0040] The gate body 1 is made of 304 stainless steel with a thickness of 2.0mm and has an arc-shaped structure to match the discharge port size of the ultrasonic vibrating screen. The gate body 1 has a hinged structure and is hinged to the screen frame 4 via hinges 7, which are also made of 304 stainless steel. The drive mechanism includes two symmetrically distributed square cylinders 2, model U25x5050, and the piston shafts 3 of the cylinders 2 are fixedly connected to the gate body 1 by bolts. The drive mechanism also includes two cylinder connectors 8 and two internal thread connectors 9, with the internal thread connectors 9 having a specification of 10×1.25 and all made of 304 stainless steel. The sealing component is a fluororubber gasket 6 to ensure sealing performance and wear resistance. The control module includes a PLC controller 10, a time relay 11, and a remote communication module 12. The remote communication module 12 is a WiFi module that can be connected to the factory local area network. A DN100 inspection port 13 is provided on the side of the vibrating screen.
[0041] In this embodiment, the pneumatic gate is installed outside the screen frame 4 at the discharge port of the ultrasonic vibrating screen and inside the slag discharge port 5. During operation, the operator sets the automatic opening and closing parameters of the gate through the control terminal in the factory's local area network. According to the material screening requirements, the gate is set to automatically open once per hour, with each opening lasting 15 seconds, achieving simultaneous screening and discharge. The PLC controller 10 receives the signal from the time relay 11 and controls the cylinder 2 to actuate, driving the gate body 1 to precisely open to the set opening degree, and then closes after the material is discharged. Since the gate body 1 is installed outside the screen frame 4, it avoids contact with the screen mesh 15, effectively preventing wear on the screen mesh 15. At the same time, the sealing gasket 6 prevents material leakage, improving screening accuracy and product quality stability.
[0042] Example 3
[0043] This embodiment provides an automatically controlled pneumatic discharge gate for a vibrating screen, compatible with multiple centrally controlled ultrasonic vibrating screens. The specific structure is as follows:
[0044] The gate body 1 is made of 304 stainless steel with a thickness of 1.8mm and has an arc-shaped structure. The discharge port size is customized according to different specifications of ultrasonic vibrating screens. The gate body 1 can be selected with or without hinges. The drive mechanism uses two W40x566C Zhengdeke cylinders 2, symmetrically distributed. The cylinder connectors 8 and internal thread connectors 9 of the drive mechanism are made of 304 stainless steel. The specifications of the internal thread connectors 9 can be flexibly selected according to the cylinder model. The sealing component is a silicone sealing gasket 6. The control module includes a PLC controller 10, a time relay 11, and an industrial Ethernet remote communication module 12. The PLC controller 10 is an S7-300 model, which realizes centralized control of multiple gates. Each vibrating screen is equipped with a DN100 inspection port 13 on its side.
[0045] In this embodiment, the pneumatic gates of 10 ultrasonic vibrating screens are connected to the PLC controller 10 in the central control room via an industrial Ethernet network. Operators in the central control room can monitor the working status of each gate in real time and set different automatic opening and closing parameters. For example, for the three vibrating screens with more impurities in the material, the gates are set to open once every 30 minutes for slag discharge, with each opening lasting 40 seconds; for the seven vibrating screens with cleaner material, the gates are set to open once every 2 hours for slag discharge, with each opening lasting 20 seconds. Through centralized control and personalized parameter settings, efficient collaborative work of multiple devices is achieved, significantly improving production management efficiency and reducing labor and equipment maintenance costs.
[0046] The automatically controlled pneumatic discharge gate of the vibrating screen of this invention solves many technical defects of the existing manual gate of the vibrating screen, meets the needs of modern industrial production for automation, continuous operation and high efficiency, and has wide industrial applicability:
[0047] In the mining industry, vibrating screens are commonly used for ore grading and screening. The pneumatic gate of this invention enables automatic slag discharge during the ore screening process, avoiding the safety risks and inefficiencies associated with manual operation. In the chemical industry, for screening highly corrosive materials, the gate body and sealing components made of 304 stainless steel have excellent corrosion resistance, ensuring stable equipment operation. In the food and pharmaceutical industries, the sealing performance and material safety of the gate meet the hygiene requirements of food and pharmaceutical production, preventing material contamination and improving product quality. In the building materials industry, in scenarios where multiple vibrating screens are centrally controlled, the remote centralized control function of this invention can significantly improve production management efficiency and reduce operating costs.
[0048] Furthermore, the pneumatic gate of the present invention has a simple structure, reasonable manufacturing cost, and convenient installation and maintenance. It can upgrade and transform the existing manual gate of the vibrating screen, and can also be used as a supporting component for new vibrating screen equipment. It has broad market prospects and promotional value.
[0049] This invention provides an automatically controlled pneumatic gate for the discharge of a vibrating screen through a rational structural design and automatic control scheme. It solves the technical problems of existing manual gates, such as high reliance on manual labor, low production efficiency, easy screen damage, and unstable product quality. This pneumatic gate achieves timed opening and closing and remote control without manual intervention, improving production efficiency and automation levels. By optimizing the installation location and structural form, it protects the screen and downstream equipment, reducing maintenance costs. It offers excellent sealing performance, high screening accuracy, and stable product quality. With strong adaptability and versatility, it can be widely used in various vibrating screen equipment, demonstrating significant technical advantages and industrial application value.
[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is determined by the claims.
Claims
1. An automatically controlled pneumatic gate for discharging material from a vibrating screen, characterized in that, The device includes a gate body, a drive mechanism, a control module, and a sealing assembly. The gate body is installed outside the screen frame at the discharge port of the vibrating screen and inside the slag discharge port, and has an arc-shaped structure. The sealing assembly is located at the contact point between the gate body and the screen frame outlet. The drive mechanism includes a cylinder, and the piston shaft of the cylinder is fixedly connected to the gate body. The control module includes a PLC controller and a time relay. The PLC controller is connected to the cylinder signal, and the time relay is used to set the automatic opening and closing time of the gate body, realizing timed opening and closing without manual intervention.
2. The automatically controlled pneumatic gate for discharging material from a vibrating screen according to claim 1, characterized in that, The cylinder is a round or square cylinder. The cylinder uses compressed air to provide driving force to realize the reciprocating linear motion of the piston shaft, thereby driving the gate body to open and close.
3. The automatically controlled pneumatic discharge gate of the vibrating screen according to claim 1, characterized in that, The gate body includes a hinged structure and a hingeless structure. The gate body with the hinged structure is hinged to the screen frame by hinges, and the hinges are made of stainless steel 304.
4. The automatically controlled pneumatic discharge gate of the vibrating screen according to claim 1, characterized in that, The sealing component is a sealing gasket, which is adapted to the arc-shaped contour of the gate body and fits tightly against the edge of the screen frame outlet to achieve a seal and prevent leakage.
5. The automatically controlled pneumatic discharge gate of the vibrating screen according to claim 1, characterized in that, The drive mechanism also includes a cylinder connector and an internal thread connector, both of which are made of 304 stainless steel. The internal thread connector has a specification of M21×1.25 or 10×1.
25.
6. The automatically controlled pneumatic gate for discharging material from a vibrating screen according to claim 1, characterized in that, The control module also includes a remote communication module, which is connected to the PLC controller for remote control of the gate's opening and closing status and parameter adjustment.
7. The automatically controlled pneumatic discharge gate of the vibrating screen according to claim 1, characterized in that, The gate body is made of 304 stainless steel and has a thickness of 1.5-2.0mm, which is suitable for the discharge port size of vibrating screens of different specifications.
8. The automatically controlled pneumatic discharge gate of the vibrating screen according to claim 1, characterized in that, The cylinders are of model MMA0X5QSCA (Airtac), U25x5050, or W40x566C (Zhengdeke), and there are two cylinders, symmetrically distributed on both sides of the gate body.
9. The automatically controlled pneumatic discharge gate of the vibrating screen according to claim 1, characterized in that, The vibrating screen includes a standard vibrating screen and an ultrasonic vibrating screen. The ultrasonic vibrating screen is adapted to a third-generation ultrasonic dedicated generator motor with a power of 1.5kw.
10. The automatically controlled pneumatic discharge gate of the vibrating screen according to claim 1, characterized in that, It also includes an inspection port, which is located on the side of the vibrating screen and has a specification of DN100. It is used for the maintenance and repair of the gate body and the drive mechanism.