Mechanical control blanking valve

Abstract

The mechanically-controlled discharging valve comprises a left valve cover, a valve rod, a cavity, an outer ring valve element and a right valve cover, airflow control is achieved through mechanical reset and physical principles, an electromagnetic valve and a complex control circuit of the electromagnetic valve are omitted, the system structure is simplified, the potential fault risk caused by the electromagnetic valve is also reduced, and the reliability of the valve is improved. The electromagnetic valve is particularly suitable for strong magnetic environments such as aluminum factories, operation instability of the electromagnetic valve in the environments is avoided, reversing of a traditional electromagnetic valve is replaced by mechanical control, additional electromagnetic valves and gas pipeline assemblies are omitted, the overall cost of a system is remarkably reduced, and the electromagnetic valve is convenient to operate through cooperation of the gas capacitor and the spring. The delay function can be achieved, the throttling valve can be adjusted to achieve the effect of adjusting the delay duration, electric control is replaced with pneumatic control, the delay and normal functions are guaranteed, and the problem that electric control is not suitable for a strong magnetic environment is solved.

Description

Technical Field

[0001] The invention relates to the electrolytic aluminum metallurgical industry, in particular to a mechanically controlled feeding valve. Background Art

[0002] The unloading system on the electrolytic cell in the electrolytic aluminum workshop consists of a unloader, a gas control cabinet and a gas pipeline.

[0003] The traditional method is to control the gas reversing by a conventional 2-position 5-way solenoid valve installed in the gas control cabinet, and deliver the compressed air to the cylinder on the feeder through the gas pipeline on the tank. The cylinder completes the feeding and retracting actions according to the compressed air pressure pipeline. Since each electrolytic cell has 5 to 7 groups of shell compression cylinders and feeders, each group requires 2 shell compression gas pipelines and 2 feeding gas pipelines, which together require at least 28 gas pipelines. In fact, due to structural limitations on the electrolytic cell, so many gas pipelines cannot be installed, so the cylinders are divided into 2 groups, so that only a minimum of 8 gas pipelines are needed.

[0004] In addition, from the working principle and demand, shell pressing and material unloading are a concomitant process. If the shell pressing is successful, the shell surface fire hole is opened, and then the material is unloaded into the fire hole, and the raw material enters the reaction area in the tank for chemical reaction. If the shell pressing is unsuccessful, the material should not be unloaded, but the equipment and methods currently used are to control the shell pressing and material unloading separately, and they cannot sense each other.

[0005] After searching, it is found that Chinese patent documents disclose a programmable high-voltage switching switch and system suitable for strong electromagnetic interference environment [Application No.: 201610030119.2, Publication No.: CN105428107B], which includes an electromagnet, an active electrode, a reset high-voltage input electrode, an excitation high-voltage input electrode, and upper and lower contacts of a reset high-voltage output electrode. The on-off action of the electromagnet drives the adsorption block to move. This system uses high voltage to avoid electromagnetic interference. This solution is completely unsuitable for the high temperature, small space, and strong magnetic environment of an aluminum smelter. Summary of the invention

[0006] A mechanically controlled feed valve, characterized in that it comprises a left valve cover, a valve stem, a cavity, an outer ring valve core and a right valve cover; A left valve cover is installed at one end of the cavity, and a right valve cover is installed at the other end of the cavity. A valve stem is movably arranged inside the cavity, and the valve stem runs through the center of the cavity. One end of the valve stem is connected to the left valve cover, and the other end of the valve stem is connected to the right valve cover. Preferably, a control port is provided on the left valve cover, a connecting hole 1 is provided at the bottom of the left valve cover, and a connecting passage 1 is provided between the control port and the connecting hole 1.

[0007] Through the above technical solution, the control port and the connection hole 1 are connected through the connection passage 1, forming a flow path for the airflow, thereby realizing the gas transfer between the left valve cover and the external gas source. This design effectively simplifies the gas path structure, reduces the resistance in the airflow channel, and optimizes the gas flow efficiency. The setting of the connection passage 1 between the control port and the connection hole 1 not only improves the precise control of the flow rate, but also increases the response speed of the system, thereby ensuring that the discharge valve can quickly and stably adjust the airflow during operation, and improving the working efficiency and reliability of the entire equipment. At the same time, the inner wall design of the connection passage 1 has been optimized to ensure that the gas does not generate excessive friction loss when passing through, further reducing energy loss and enhancing the stability of the equipment under high-load working conditions.

[0008] Preferably, a throttle valve is provided on the right valve cover, a second connecting hole is provided at the bottom of the right valve cover, and a second connecting passage is provided between the throttle valve and the second connecting hole.

[0009] Through the above technical solution, the connecting passage 2 between the throttle valve and the connecting hole 2 provided on the right valve cover effectively regulates the gas flow through the right valve cover. The setting of the throttle valve enables the gas to flow at a predetermined flow rate when passing through the connecting passage 2, thereby accurately controlling the action of the unloading cylinder. By adjusting the opening of the throttle valve, the rate and pressure of the airflow can be adjusted according to different working requirements to ensure the smoothness and accuracy of the unloading process. This design optimizes the airflow regulation function, so that the entire system can be adjusted according to actual use requirements, and can achieve efficient and reliable control under different working conditions, reducing the operating errors caused by unstable airflow, and improving the operating accuracy and service life of the equipment.

[0010] Preferably, the valve stem is cylindrical as a whole, grooves are provided at both ends of the valve stem, Y-shaped sealing assemblies are provided at both ends of the valve stem, an air capacitor is provided at the end of the valve stem connected to the left valve cover, the air capacitor is arranged between the valve stem and the left valve cover, an outer ring valve core, a spring and are provided at the end of the valve stem connected to the right valve cover, the outer ring valve core is arranged between the valve stem and the right valve cover, and the spring is arranged in a groove opened at the side end of the right valve cover.

[0011] Through the above technical solution, the gas volume can realize the function of delay. The cylindrical design of the valve stem and the grooves opened at both ends can ensure that the valve stem slides smoothly in the cavity, reduce friction and wear, and extend the service life. The setting of the Y-shaped sealing component effectively prevents gas leakage, improves the sealing performance, ensures the stable transmission of gas between the valve stem and the valve cover, and can greatly extend the service life through the Y-shaped sealing component and the cylindrical design of the valve stem. The design of the gas volume further optimizes the airflow control between the valve stem and the left valve cover, so that the gas can be smoothly adjusted during the transmission process. In addition, the combination of the outer ring valve core and the spring ensures that the valve stem can be reset after the predetermined delay through the restoring force of the spring, ensuring the accuracy and stability of the entire system during operation. The setting of the outer ring valve core between the valve stem and the right valve cover further enhances the sealing of the valve stem and the stability of airflow control. The overall design enables the equipment to work for a long time in an efficient and stable state, reducing operating errors and energy consumption.

[0012] Preferably, the Y-shaped sealing assembly includes a copper fixing member and a Y-shaped rubber sealing ring.

[0013] Through the above technical solutions, the design of the Y-shaped sealing assembly effectively improves the sealing performance. The use of copper fixings provides strength and stability, allowing the Y-shaped sealing ring to always remain in the predetermined position, avoiding displacement caused by external pressure changes or friction during use. The Y-shaped rubber sealing ring, through its flexible characteristics, closely cooperates with the contact surface of the valve stem and the valve cover to form an efficient sealing effect and prevent gas leakage. This design not only improves the sealing performance of the equipment, but also enhances its adaptability and durability in high-pressure environments, extends the service life of the sealing assembly, and can maintain stable performance under different working conditions. In addition, the combination of copper fixings and rubber sealing rings ensures the stability of the sealing assembly in long-term use and reduces maintenance costs.

[0014] Preferably, the spring is a two-section structure, including a primary elastic section and a secondary elastic section. The two sections of the elastic structure have different stiffnesses and are used to provide segmented damping during the valve stem resetting process.

[0015] Through the above technical solution, the design of the two-stage spring effectively provides segmented reset damping. The difference in stiffness between the primary elastic section and the secondary elastic section enables the spring to provide different damping effects at different stages of valve stem reset. The primary elastic section has a larger stiffness, which is mainly used to provide a stronger compression force in the initial stage of valve stem reset, thereby overcoming the larger inertia and resistance and quickly pushing the valve stem to move. The secondary elastic section has a smaller stiffness, providing a relatively gentle mechanical response, reducing vibration and impact in the later stage of reset, and ensuring that the valve stem returns to the initial position smoothly and accurately. Through this design, in conjunction with the gas volume and the throttle valve, the functions of delayed reset and timely reset after the valve stem is extended can be realized. By adjusting the flow rate of the throttle valve, the time of delayed reset can be adjusted. When the pressure in the gas volume is greater than the elastic force provided by the spring, the delay effect can be achieved. As the gas in the gas volume is discharged through the throttle valve, the pressure in the gas volume will be less than the elastic force provided by the spring. The primary elasticity of the spring can achieve rapid reset to achieve the purpose of timely termination of the action. The secondary elasticity of the spring can achieve the purpose of reducing vibration and impact, greatly extending the service life.

[0016] Preferably, a sealing bracket is provided in the cavity, the inner wall of the sealing bracket is in contact with the outer wall of the valve stem, and the size of the sealing bracket is matched with the size of the valve stem.

[0017] Through the above technical solution, the tight fit between the sealing bracket and the inner and outer walls of the valve stem ensures the stable operation of the valve stem in the cavity and avoids sealing failure caused by the shaking or deviation of the valve stem. The size of the sealing bracket is compatible with the size of the valve stem, ensuring that the sealing bracket can be firmly installed in the cavity and maintain the correct alignment. This design optimizes the movement path of the valve stem through precise size matching, reduces friction and wear, and improves the sealing performance and prevents gas leakage. The stability of the sealing bracket further enhances the reliability of the entire system, ensuring that the equipment can still maintain long-term stable operation under high pressure and high frequency working conditions, reducing the frequency of repairs and maintenance costs.

[0018] Preferably, the sealing bracket is a split structure, including a sealing inner frame and a sealing outer frame, the inner wall of the sealing inner frame is in contact with the outer wall of the valve stem, and the outer wall of the sealing outer frame is in contact with the inner wall of the cavity.

[0019] Through the above technical solution, the design of the split sealing bracket enables the sealing inner frame and the sealing outer frame to be installed independently, thereby simplifying the assembly process. The inner wall of the sealing inner frame fits the outer wall of the valve stem, ensuring the sealing performance of the valve stem during operation and preventing gas leakage. The outer wall of the sealing outer frame fits the inner wall of the cavity, further enhancing the airtightness in the cavity, and through effective fitting, reducing friction and wear, extending the service life of the equipment. This design can also adapt to valve stems and cavities of different sizes and shapes, improving the versatility and installation flexibility of the sealing bracket. At the same time, the split structure design facilitates maintenance and replacement, reduces equipment downtime, and reduces overall maintenance costs.

[0020] Compared with the prior art, the present invention has the following advantages: 1. The mechanically controlled discharge valve realizes airflow control through mechanical reset and physical principles, eliminating the solenoid valve and its complex control circuit. It not only simplifies the system structure, but also reduces the potential failure risk caused by the solenoid valve. It is particularly suitable for strong magnetic environments such as aluminum plants, avoiding the instability of the operation of the solenoid valve in such an environment.

[0021] 2. The mechanically controlled discharge valve replaces the traditional solenoid valve reversing through mechanical control, eliminating the need for additional solenoid valves and gas pipeline components, which significantly reduces the overall cost of the system, while reducing maintenance requirements and maintenance costs, and improving the long-term economy of the equipment.

[0022] 3. The mechanically controlled discharge valve can realize the delay function through the cooperation between the air volume and the spring, and the throttle valve can be adjusted to adjust the delay time. The use of air control instead of electric control not only ensures the delay and normal function, but also solves the problem that electric control is not suitable in a strong magnetic environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of an exploded view of the present invention; Figure 2 It is a schematic cross-sectional view of the valve body of the present invention; Figure 3 It is a schematic diagram of the right valve cover of the present invention.

[0024] In the figure: 101, left valve cover; 102, valve stem; 103, cavity; 104, outer ring valve core; 105, right valve cover; 106, spring; 201, control port; 202, connecting hole one; 203, connecting passage one; 301, throttle valve; 302, connecting hole two; 303, connecting passage two; 401, Y-shaped sealing assembly; 501, sealing bracket. DETAILED DESCRIPTION

[0025] A mechanically controlled discharge valve comprises a left valve cover 101, a valve stem 102, a cavity 103, an outer ring valve core 104 and a right valve cover 105. The left valve cover 101 comprises a control port 201 and a connecting hole 202. The control port 201 is located at the top of the left valve cover 101 and is connected to an external air source for inputting an air pressure signal. The connecting hole 202 is opened at the bottom of the left valve cover 101 and is connected to the control port 201 through a connecting passage 203 to transfer the air pressure to the air volume at the left end of the valve stem 102. The air volume is a closed space surrounded by the inner wall of the left valve cover 101 and the groove at the left end of the valve stem 102. The volume can be changed by adjusting the installation depth of the left valve cover 101.

[0026] The right valve cover 105 includes a throttle valve 301 and a second connecting hole 302. The throttle valve 301 is arranged on the outer side of the right valve cover 105 and is an adjustable needle valve structure for controlling the gas discharge rate. The second connecting hole 302 is opened at the bottom of the right valve cover 105 and is connected to the throttle valve 301 through a second connecting passage 303 to form an air volume chamber exhaust channel. The inner end face of the right valve cover 105 is provided with an annular groove for fixing the spring 106.

[0027] The valve stem 102 is a cylindrical body that passes through the center of the cavity 103 . A Y-shaped sealing assembly 401 is provided on the valve stem 102 and is installed in the annular grooves at both ends of the valve stem 102 . The Y-shaped sealing assembly 401 includes a copper fixing 501 and a Y-shaped rubber sealing ring to prevent gas leakage along the valve stem 102 .

[0028] A sealing bracket 501 is provided in the cavity 103 , which is a split structure, and is composed of a sealing inner frame fitted to the valve stem 102 and a sealing outer frame fitted to the cavity 103 , so as to ensure air tightness when the valve stem 102 moves.

[0029] The spring 106 is a two-section structure, including a primary elastic section and a secondary elastic section. The primary elastic section has a lower stiffness and provides initial reset resistance, while the secondary elastic section has a higher stiffness and ensures rapid closure at the end of reset.

[0030] How it works 1. Valve stem push stage Trigger signal input: An external gas source injects compressed air into the control port 201, and the gas enters the gas volume chamber through the connecting passage 1 203.

[0031] Air pressure drives the valve stem 102: the pressure in the air volume chamber increases, pushing the valve stem 102 to the right, compressing the right end double-section spring 106. At this time: Y-shaped sealing assembly 401: The rubber sealing ring expands under pressure and adheres closely to the inner wall of the cavity 103 to prevent gas leakage.

[0032] The outer valve core 104 moves rightward along with the valve stem 102 to open the external material passage to realize material discharge.

[0033] Energy storage state of the spring 106: the double-section spring 106 is compressed, the primary elastic section is deformed first, and the secondary elastic section begins to participate in the deformation after the primary section is compressed to a set stroke.

[0034] 2. Air pressure maintenance and delay phase Gas source cut-off: When the valve stem 102 moves to the fully open position, the control port 201 stops taking in gas, and the gas volume chamber turns into a closed state.

[0035] Throttling exhaust process: the remaining gas in the gas volume chamber is slowly discharged through the right valve cover 105 connecting passage 2 303 and the throttle valve 301.

[0036] The rate of pressure decay is determined by: Throttle valve 301 opening: The smaller the opening, the smaller the cross-sectional area of ​​the exhaust passage, the slower the air pressure drops, and the longer the delay.

[0037] Gas volume: The larger the volume, the more gas can be stored and the delay time increases significantly.

[0038] The spring 106 resists the gas pressure: the spring 106 rebound force and the gas pressure continue to act, and the valve stem 102 remains in the fully open position until the gas pressure drops to the spring 106 rebound force threshold.

[0039] 3. Valve stem reset stage Critical point triggering: When the pressure in the air volume chamber drops to the spring 106 rebound force threshold, the double-stage spring 106 begins to release potential energy: Function of the primary section: The low-rigidity section rebounds first, providing a gentle initial restoring force to avoid impact caused by instantaneous closure of the valve stem 102.

[0040] Secondary section acceleration: When the valve stem 102 is reset to the middle position, the high-rigidity section participates in the driving, pushing the valve stem 102 to move quickly to the left to the closed position.

[0041] Sealing and Closure: The outer valve core 104 moves leftward along with the valve stem 102 and cooperates with the inner wall of the cavity 103 to close the external material passage.

[0042] Y-shaped sealing assembly 401: maintains air tightness during the resetting process and prevents external dust from entering the air chamber.

[0043] The unloading valve of the present invention is widely applicable to airflow control systems in high magnetic environments such as aluminum plants. Its mechanical control method replaces the electromagnetic valve, avoids the interference of the electromagnetic field on the electromagnetic valve, improves the stability of the system, and reduces the equipment failure rate.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A mechanically controlled discharge valve, characterized in that: The invention comprises a left valve cover (101), a valve stem (102), a cavity (103), an outer ring valve core (104) and a right valve cover (105); the left valve cover (101) is installed at one end of the cavity (103), the right valve cover (105) is installed at the other end of the cavity (103), a valve stem (102) is movably arranged inside the cavity (103), the valve stem (102) passes through the center of the cavity (103), one end of the valve stem (102) is connected to the left valve cover (101), and the other end of the valve stem (102) is connected to the right valve cover (105).

2. A mechanically controlled discharge valve according to claim 1, characterized in that: The left valve cover (101) is provided with a control port (201), a connecting hole (202) is provided at the bottom of the left valve cover (101), and a connecting passage (203) is provided between the control port (201) and the connecting hole (202).

3. A mechanically controlled discharge valve according to claim 1, characterized in that: The right valve cover (105) is provided with a throttle valve (301), the bottom of the right valve cover (105) is provided with a second connecting hole (302), and a second connecting passage (303) is provided between the throttle valve (301) and the second connecting hole (302).

4. A mechanically controlled discharge valve according to claim 1, characterized in that: The valve stem (102) is cylindrical as a whole, and grooves are provided at both ends of the valve stem (102). Y-shaped sealing components (401) are provided at both ends of the valve stem (102). An air capacity is provided at the end of the valve stem (102) connected to the left valve cover (101), and the air capacity is arranged between the valve stem (102) and the left valve cover (101). An outer ring valve core (104) and a spring (106) are provided at the end of the valve stem (102) connected to the right valve cover (105). The outer ring valve core (104) is arranged between the valve stem (102) and the right valve cover (105), and the spring (106) is arranged in a groove provided at the side end of the right valve cover (105).

5. The Y-shaped sealing assembly (401) according to claim 4, characterized in that: The Y-shaped sealing assembly (401) comprises a copper fixing piece and a Y-shaped rubber sealing ring.

6. The spring (106) according to claim 4, characterized in that: The spring (106) is a two-section structure, including a primary elastic section and a secondary elastic section. The two sections of the elastic structure have different stiffnesses and are used to provide segmented damping during the resetting process of the valve stem (102).

7. A mechanically controlled discharge valve according to claim 1, characterized in that: A sealing bracket (501) is provided in the cavity (103), the inner wall of the sealing bracket (501) is in contact with the outer wall of the valve stem (102), and the size of the sealing bracket (501) is matched with the size of the valve stem (102).

8. The sealing bracket (501) according to claim 7, characterized in that: The sealing bracket (501) is a split structure, comprising a sealing inner frame and a sealing outer frame, the inner wall of the sealing inner frame is in contact with the outer wall of the valve stem (102), and the outer wall of the sealing outer frame is in contact with the inner wall of the cavity (103).

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