A hand control for a pneumatic valve

Abstract

The utility model relates to pneumatic gate valve technical field, especially disclose a kind of manual control device of pneumatic valve. The device includes compressed main air pipe, plastic air pipe, gas circuit control device and pneumatic gate valve;Gas circuit control device is made of open use three-way ball valve, close use three-way ball valve and air pipe joint, and integratedly fixed on mounting seat to form modular structure;One end of plastic air pipe is communicated with compressed main air pipe through air pipe joint, the other end is respectively connected the air inlet of two three-way ball valves, and the air outlet of two three-way ball valves is connected with the cylinder air pipe interface of pneumatic gate valve correspondingly.Control, open pneumatic gate valve need to be opened to use three-way ball valve to be pushed to the "open" position for air supply, close use three-way ball valve is pushed to "close" position exhaust;When closing, operation is contrary.In addition, control device is fixed within 2m range of slurry pump, three-way ball valve handle is provided with fluorescent "open" "close" mark, exhaust port is provided with dust screen, and plastic air pipe uses mineral slurry corrosion resistant material.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic gate valve technology, and in particular to a manual control device for a pneumatic valve. Background Technology

[0002] During the operation and maintenance of pneumatic gate valves for slurry pumps at slurry transportation sites, we have been consistently troubled by the existing pneumatic gate valve control methods. The environment at slurry operation sites is already harsh, with slurry residue, dust, and various equipment pipelines crisscrossing everywhere. The original pneumatic gate valve control device was not integrated at all—the compressed air pipe was a separate metal pipe, and the control valves were scattered and fixed in different locations. The pipelines were frequently corroded by slurry and deformed by collisions with passing equipment. Every time we needed to repair something, we had to search through the messy site for a long time to find the corresponding air pipe and valve, which was particularly time-consuming.

[0003] What's more troublesome is that the previous control valves were at least 5 meters away from the slurry pump and pneumatic gate valve. Sometimes, when it was necessary to urgently open or close the gate valve (such as when the slurry was blocked), one had to run from the operator's post to the valve. Running back and forth not only wasted time but could also cause one to miss the best time to deal with the problem, leading to the malfunction escalating. Moreover, there were no clear "open" or "closed" markings on the valve handles. Even if there were markings, they would soon be covered by slurry. In situations such as underground or at night with poor lighting, it was impossible to tell which direction to turn the handle. If the valve was turned in the wrong direction by mistake, it would cause the gate valve to jam.

[0004] Furthermore, the original control valves had open exhaust ports, allowing slurry dust to easily seep into the valve body. Over time, this dust would clog the inside of the ball valve, making the handle difficult to turn and causing poor air supply, as well as preventing the gate valve from opening and closing properly. Each time the valve was cleaned, the entire valve body had to be disassembled, which was both dirty and laborious, requiring maintenance on average once a month. This significantly increased the workload and affected the continuous efficiency of slurry transportation. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a manual control device for pneumatic valves, which solves the technical problems of traditional manual control devices for pneumatic gate valves in slurry operations, such as scattered and easily damaged pipelines, long distances between control valves and slow response, unclear markings leading to easy misoperation, dust entering the exhaust port causing valve blockage and jamming, and components not being corrosion resistant, resulting in inconvenient control, low reliability, and frequent maintenance.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A manual control device for a pneumatic valve includes a compressed main air pipe, a plastic air pipe, an air circuit control device, and a pneumatic gate valve. The pneumatic control device consists of an open three-way ball valve, a close three-way ball valve, and a pneumatic pipe connector; One end of the plastic air tube is connected to the main compressed air tube through an air tube connector, and the other end is connected to the air inlet of the open three-way ball valve and the air inlet of the closed three-way ball valve respectively. The air outlet of the three-way ball valve for opening and the air outlet of the three-way ball valve for closing are respectively connected to the air pipe interface of the pneumatic gate valve. When the pneumatic gate valve is opened, the handle of the three-way ball valve is moved to the "open" position to supply air to the cylinder of the pneumatic gate valve. At the same time, the handle of the three-way ball valve is moved to the "close" position to cut off the air supply and allow the cylinder of the pneumatic gate valve to exhaust and depressurize. When the pneumatic gate valve is closed, move the handle of the three-way ball valve to the "closed" position and simultaneously move the handle of the three-way ball valve to the "open" position.

[0007] Preferably, the air circuit control device is fixedly installed within 2m of the slurry pump, and the compressed main air pipe is laid along the working area to the air circuit control device, and a branch interface adapted to the plastic air pipe is formed through the air pipe joint.

[0008] Preferably, the plastic air tube includes two independent air tubes, namely a first plastic air tube and a second plastic air tube; The two ends of the first plastic air tube are connected to the air tube connector and the air inlet of the three-way ball valve, respectively. The two ends of the second plastic air tube are connected to the air tube connector and the air inlet of the three-way ball valve, respectively.

[0009] Preferred: The "open" position of the three-way ball valve is the working position in which the air inlet and outlet are connected, and the "closed" position is the pressure relief position in which the air inlet is closed and the air outlet is connected to its own exhaust port; The "open" position of the three-way ball valve is the working position where the air inlet and outlet are connected, and the "closed" position is the pressure relief position where the air inlet is closed and the air outlet is connected to its own exhaust port.

[0010] Preferably, the pneumatic control device also includes a mounting base, and the three-way ball valve for opening, the three-way ball valve for closing, and the pneumatic pipe connector are all fixed on the mounting base to form a modular integrated structure. The mounting base is provided with mounting holes for fixing to the work area.

[0011] Preferred: The main compressed air pipe is made of wear-resistant metal, and the plastic air pipe is made of polyethylene material that is resistant to mineral slurry corrosion. The outer diameter of the plastic air pipe is interference-fitted with the inner diameter of the air pipe connector and the air inlet of the three-way ball valve.

[0012] Preferably, the handles of the three-way ball valve for opening and the three-way ball valve for closing are respectively marked with "Open" and "Closed", and the markings are made with fluorescent coating; Dustproof screens are installed at both the vent ports of the open and closed three-way ball valves to prevent dust and slurry from entering the valve.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The gas circuit control device is fixed within 2m of the slurry pump, allowing operators to control the gate valve without having to run a long distance, enabling a rapid response in emergencies. At the same time, the three-way ball valve handle is equipped with fluorescent "open" and "close" indicators, which can clearly identify the operating direction even in poor lighting conditions or when the slurry covers a small amount of the indicator, completely avoiding misoperation and reducing production interruptions caused by misoperation.

[0014] The three-way ball valve for opening, the three-way ball valve for closing, and the air pipe connector are integrated on the mounting base to form a modular structure, which solves the problems of scattered and easily damaged pipelines in traditional control devices. In addition, the plastic air pipe, air pipe connector, and air inlet of the three-way ball valve are interference fit to ensure airtightness and reduce air leakage failures. The dustproof screen added to the exhaust port can effectively prevent slurry dust from entering the valve body, avoid valve blockage and jamming, extend the valve maintenance cycle, and reduce maintenance workload.

[0015] The main compressed air pipe is made of wear-resistant metal, which can withstand collisions with on-site equipment; the plastic air pipe is made of polyethylene material that is resistant to mineral slurry corrosion, which avoids mineral slurry residue corroding the pipeline, greatly extending the overall service life of the device, and can still work stably in environments with a lot of mineral slurry dust and strong corrosiveness.

[0016] The modular mounting base has mounting holes for quick fixation in the work area; the device has a simple structure and clear connections between components, allowing for quick location of faulty parts during maintenance (such as replacing damaged plastic air hoses or cleaning dust filters) without disassembling the overall structure, further improving maintenance efficiency. Attached Figure Description

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0018] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a structural diagram of the three-way ball valve in this utility model.

[0019] Legend: 1. Main compressed air pipe; 2. Plastic air pipe; 3. Air circuit control device; 4. Pneumatic gate valve; 21. First plastic air pipe; 22. Second plastic air pipe; 31. Opening three-way ball valve; 32. Closing three-way ball valve; 33. Air pipe connector; 41. Cylinder air pipe interface; 311. Opening three-way ball valve exhaust port; 321. Closing three-way ball valve exhaust port. Detailed Implementation

[0020] This application provides a manual control device for a pneumatic valve, which effectively solves the technical problems of traditional manual control devices for pneumatic gate valves in slurry operations, such as scattered and easily damaged pipelines, long distances between control valves and slow response, unclear markings leading to easy misoperation, dust entering the exhaust port causing valve blockage and jamming, and components being susceptible to corrosion, resulting in inconvenient control, low reliability, and frequent maintenance. Example

[0021] like Figure 1 , Figure 2 As shown, the overall technical solution in this application embodiment is as follows: To address the problems existing in the prior art, this utility model provides a manual control device for pneumatic valves, which is suitable for manual control of pneumatic gate valves at the slurry pump inlet and outlet in mining grinding and flotation systems. It is particularly designed for the harsh working environment of "dust and slurry overflow" in this scenario, aiming to solve the problems of existing solenoid valve control failure, long air pipes prone to leakage and misoperation, and the need for multiple operators.

[0022] This implementation method is designed with single-person operation, clear air path, and resistance to harsh environments as its core design principles. The selection of each component must match the characteristics of mining operations. The specific parameters and selection criteria are as follows: Compressed main air pipe 1: Made of wear-resistant seamless steel pipe, it has the characteristics of resisting slurry impact and dust wear, and can be adapted to the compressed air system on the mining site to avoid air leakage problems caused by corrosion or wear after long-term use.

[0023] Plastic air tube 2: It consists of two independent corrosion-resistant air tubes, namely the first plastic air tube 21 and the second plastic air tube 22. Both are made of polyethylene material, which is resistant to chemical corrosion of mineral slurry (such as sulfide mineral slurry and acidic mineral slurry) and has good flexibility, which can be flexibly adapted to the short-distance connection between the air circuit control device 3 and the pneumatic gate valve 4.

[0024] Gas circuit control device 3: The three-way ball valve 31 for opening and the three-way ball valve 32 for closing are both manual three-way ball valves. The valve body integrates two positions, "open" and "closed". The internal valve core has a T-shaped structure, which can realize the three-state switching of "supplying air - cutting off - depressurizing". The handle length is set to 80mm, which is convenient for operation while wearing gloves.

[0025] Air pipe connector 33: Select quick-connect pneumatic connector, made of engineering plastic, with quick disassembly and assembly capability, and the connector has an internal sealing ring (nitrile rubber) to ensure no compressed air leakage.

[0026] Mounting bracket: The surface is galvanized for rust prevention and has four pre-drilled mounting holes for fixing the air circuit control device 3 to the steel structure bracket next to the slurry pump, so as to achieve modular installation.

[0027] Marking: A red "Open" mark is sprayed on the handle of the three-way ball valve 31 for opening, and a blue "Close" mark is sprayed on the handle of the three-way ball valve 32 for closing. The marking coating is fluorescent (photoluminescent material) to ensure that operators can quickly identify the gear in dim working environments.

[0028] Dustproof netting: Install one layer of 100-mesh nylon dustproof netting at each of the exhaust ports 311 and 321 of the three-way ball valve (open and closed). Secure the netting to the exhaust port end with clips to prevent dust and mineral slurry droplets from entering the ball valve and avoid valve core blockage.

[0029] Pneumatic gate valve 4: Compatible with commonly used pneumatic gate valves in mines. Its cylinder air pipe interface 41 is a standard threaded interface, which can be directly connected to the air outlet of the three-way ball valve 31 for opening and the three-way ball valve 32 for closing via thread (with Teflon tape sealing), without the need for additional adapters.

[0030] On-site installation steps: Determine the installation location: Within 2m of the slurry pump (inlet or outlet), select a location where there is no direct slurry flushing and where it is convenient for the operator to stand. Through the mounting holes of the mounting base 34, use M8 expansion bolts to fix the air circuit control device 3 to the steel structure support or concrete foundation, ensuring that the device is placed horizontally and that the handle operation is unobstructed.

[0031] Connect the main compressed air pipe 1: branch off from the main compressed air pipeline at the mine site, lay the main compressed air pipe 1 along the equipment support to the air circuit control device 3, and connect it to the air inlet end of the air pipe joint 33 by welding or threaded connection (with union). After connection, an air tightness test is required (pass through 0.8MPa compressed air, apply soapy water to the interface, and it is qualified if there are no bubbles).

[0032] Connect plastic air tube 2: Insert one end of the first plastic air tube 21 into the first branch interface of the air tube connector 33, and the other end into the air inlet of the three-way ball valve 31 (quick-connection, after insertion, pull in the opposite direction to confirm that it has not fallen off); insert one end of the second plastic air tube 22 into the second branch interface of the air tube connector 33, and the other end into the air inlet of the three-way ball valve 32 (closed), to complete the initial connection of the air circuit.

[0033] Connecting the pneumatic gate valve 4: Using a threaded connector (matching the cylinder air pipe interface 41 of the pneumatic gate valve 4), connect the air outlet of the opening three-way ball valve 31 to the "open chamber" interface of the cylinder of the pneumatic gate valve 4, and connect the air outlet of the closing three-way ball valve 32 to the "closed chamber" interface of the cylinder of the pneumatic gate valve 4. After connection, test the air tightness again to ensure that there is no air leakage in the cylinder.

[0034] Debugging and protection: Check whether the markings on the handles of the three-way ball valve 31 for opening and the three-way ball valve 32 for closing are clear. If there is wear, apply fluorescent coating. Confirm that the dust screens at the exhaust ports 311 and 321 of the three-way ball valve for opening and closing are firmly installed without loosening or damage. Complete the overall installation.

[0035] Manual control operation procedure: Control the pneumatic gate valve 4 to open: The operator stands next to the pneumatic control device 3 and identifies the position of the three-way ball valve 31 when it is open and the three-way ball valve 32 when it is closed by the markings on the handle. Hold the handle of the three-way ball valve 31 and turn it to the "open" position: At this time, the air inlet and outlet of the three-way ball valve 31 are connected, and compressed air passes through the main compressed air pipe 1 → air pipe connector 33 → first plastic air pipe 21 → three-way ball valve 31 → the cylinder of the pneumatic gate valve 4 "opens the chamber", supplying air to the cylinder and pushing the gate to move upward; At the same time, hold the handle of the three-way ball valve 32 and turn it to the "closed" position: at this time, the air inlet of the three-way ball valve 32 is closed, and the air outlet is connected to the exhaust port 321 of the three-way ball valve. The residual gas in the "closed chamber" of the pneumatic gate valve 4 cylinder is discharged through the three-way ball valve 32 → the exhaust port 321 of the three-way ball valve → the dust screen, thus realizing the pressure relief of the "closed chamber". Observe the position of the gate of the pneumatic gate valve 4 (or listen to the sound of the cylinder operating), and stop the operation after confirming that the gate is fully open. At this time, use the three-way ball valve 31 to keep it in the "open" position and use the three-way ball valve 32 to keep it in the "closed" position. The pneumatic gate valve 4 will be stable in the open state.

[0036] Control the pneumatic gate valve 4 to close: The operator also identifies the gear position by marking it, holds the handle of the three-way ball valve 31, and moves it to the "closed" position: at this time, the air inlet of the three-way ball valve 31 is closed, and the air outlet is connected to the exhaust port 311 of the three-way ball valve. The residual gas in the "open chamber" of the pneumatic gate valve 4 cylinder is discharged through the three-way ball valve 31 → exhaust port 311 → dust screen, realizing the "open chamber" pressure relief. At the same time, hold the handle of the three-way ball valve 32 and turn it to the "open" position: at this time, the air inlet and outlet of the three-way ball valve 32 are connected, and compressed air is supplied to the cylinder "closing chamber" of the pneumatic gate valve 4 through the main compressed air pipe 1 → air pipe joint 33 → second plastic air pipe 22 → three-way ball valve 32 → pneumatic gate valve 4, pushing the gate to move downward. Observe the position of the gate of the pneumatic gate valve 4 (or listen to the sound of the cylinder operating), and stop the operation after confirming that the gate is completely closed. At this time, use the three-way ball valve 31 to keep it in the "closed" position and use the three-way ball valve 32 to keep it in the "open" position. The pneumatic gate valve 4 is stable in the closed state.

[0037] The dust filter needs to be checked monthly for blockage. If too much slurry or dust adheres to it, it needs to be removed, cleaned, or replaced to avoid poor exhaust and slow cylinder movement. Apply grease (lithium-based grease) to the handle shaft of the three-way ball valve 31 for opening and the three-way ball valve 32 for closing every quarter to prevent the valve core from getting stuck. If plastic air hose 2 needs to be replaced, the main valve of the compressed air hose 1 must be closed first, and the pressure must be released before disassembly and reassembly. Operation under pressure is prohibited. If fluorescent labels fade, they should be reapplied promptly to ensure accurate operation in dimly lit environments.

[0038] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A manual control device for a pneumatic valve, characterized in that, It includes a main compressed air pipe (1), a plastic air pipe (2), an air circuit control device (3), and a pneumatic gate valve (4); The air circuit control device (3) consists of an opening three-way ball valve (31), a closing three-way ball valve (32), and an air pipe connector (33); One end of the plastic air tube (2) is connected to the main compressed air tube (1) through the air tube connector (33), and the other end is connected to the air inlet of the open three-way ball valve (31) and the air inlet of the closed three-way ball valve (32) respectively. The air outlet of the three-way ball valve (31) for opening and the air outlet of the three-way ball valve (32) for closing are respectively connected to the cylinder air pipe interface (41) of the pneumatic gate valve (4); When the pneumatic gate valve (4) is opened, the handle of the three-way ball valve (31) is moved to the "open" position to supply air to the cylinder of the pneumatic gate valve (4), and at the same time the handle of the three-way ball valve (32) is moved to the "close" position to cut off the air supply and allow the cylinder of the pneumatic gate valve (4) to exhaust and depressurize. When the pneumatic gate valve (4) is closed, the handle of the three-way ball valve (31) is moved to the "closed" position, and the handle of the three-way ball valve (32) is moved to the "open" position.

2. The manual control device for a pneumatic valve according to claim 1, characterized in that, The air circuit control device (3) is fixedly installed within a 2m range of the slurry pump. The compressed main air pipe (1) is laid along the working area to the air circuit control device (3) and a branch interface adapted to the plastic air pipe (2) is formed through the air pipe joint (33).

3. The manual control device for a pneumatic valve according to claim 1, characterized in that, The plastic air tube (2) includes two independent air tubes, namely the first plastic air tube (21) and the second plastic air tube (22); The two ends of the first plastic air tube (21) are respectively connected to the air tube connector (33) and the air inlet of the three-way ball valve (31) for opening. The two ends of the second plastic air tube (22) are respectively connected to the air tube connector (33) and the air inlet of the three-way ball valve (32) for closing.

4. The manual control device for a pneumatic valve according to claim 1, characterized in that, The "open" position of the three-way ball valve (31) is the working position in which its air inlet and outlet are connected, and the "closed" position is the pressure relief position in which its air inlet is closed and its outlet is connected to the exhaust port (311) of the three-way ball valve. The "open" position of the three-way ball valve (32) is the working position in which its air inlet and outlet are connected, and the "closed" position is the pressure relief position in which its air inlet is closed and its outlet is connected to the exhaust port (321) of the three-way ball valve.

5. A manual control device for a pneumatic valve according to claim 1, characterized in that, The pneumatic control device (3) also includes a mounting base. The three-way ball valve (31) for opening, the three-way ball valve (32) for closing, and the air pipe connector (33) are all fixed on the mounting base to form a modular integrated structure. The mounting base is provided with mounting holes for fixing to the work area.

6. The manual control device for a pneumatic valve according to claim 1, characterized in that, The main compressed air pipe (1) is made of wear-resistant metal, and the plastic air pipe (2) is made of polyethylene material that is resistant to mineral slurry corrosion. The outer diameter of the plastic air pipe (2) is interference-fitted with the inner diameter of the air pipe connector (33) and the air inlet of the three-way ball valve.

7. The manual control device for a pneumatic valve according to claim 1, characterized in that, The handles of the three-way ball valve (31) for opening and the three-way ball valve (32) for closing are respectively marked with "open" and "closed", and the markings are made with fluorescent coating; Dustproof screens are provided at both the vent port (311) of the open three-way ball valve and the vent port (321) of the closed three-way ball valve to prevent dust and slurry from entering the ball valve.

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