Cut-off valve for dusty material hopper

Abstract

This utility model discloses a material shut-off valve for a hopper specifically designed for dusty materials, relating to the field of material shut-off valves. It includes a valve chamber, with a valve cover fixedly connected to the upper end of the chamber. A first connecting pipe is fixedly connected to the upper end of the valve cover, and a manual valve is installed on the outer surface of the first connecting pipe. A second connecting pipe is fixedly connected to the lower end of one side of the valve chamber. This utility model, employing the above structure, has significantly lower maintenance costs than electric valves containing motors and reducers. Furthermore, the dust cover design, adapted to dusty environments, protects the cylinder rod from contamination, extending its service life. The movable connection between the closing plate and the third connecting pipe, combined with the stable thrust of the cylinder, achieves a dual sealing effect of metal and elastic materials, effectively preventing dust from escaping and polluting the environment or causing system negative pressure imbalance. It also prevents material from accumulating and agglomerating in dead corners of the valve body, making it particularly suitable for easily airborne and clogged dusty materials such as flour and chemical powders.

Description

Technical Field

[0001] This utility model belongs to the field of material shut-off valves, and specifically relates to a material shut-off valve for a special hopper for dusty materials. Background Technology

[0002] The dust-specific hopper shut-off valve is a special valve designed for conveying and storing dust-like materials. Its core function is to be installed at a specific position in the hopper and to precisely control or cut off the flow of dust-like materials between the hopper and subsequent or upstream equipment by opening and closing the valve. It is also adapted to the characteristics of dust-like materials, such as easy airborneness, easy clogging, and special fluidity.

[0003] The existing material shut-off valves for dust-specific hoppers cannot automatically close, which brings multiple critical problems to the production process, environmental control, and safety management. On the one hand, dust in the hopper is prone to continuous leakage or excessive conveying due to the valve's inability to cut off the flow in time. This not only wastes materials but also causes subsequent equipment to become blocked or jammed due to overload, directly interrupting the production line and increasing downtime maintenance costs. On the other hand, the unclosed valve becomes the main channel for dust diffusion, with a large amount of dust escaping into the workshop air. This not only pollutes the working environment and harms the respiratory health of operators but may also cause the dust concentration to exceed the explosion limit, creating a major safety hazard of fire and explosion. Utility Model Content

[0004] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a material shut-off valve for a special hopper for dusty materials, so as to solve the problems mentioned in the background art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A material intercepting valve for a dust-specific hopper includes a valve chamber. A valve cover is fixedly connected to the upper end of the valve chamber. A first connecting pipe is fixedly connected to the upper end of the valve cover. A manual valve is provided on the outer surface of the first connecting pipe. A second connecting pipe is fixedly connected to the lower end of one side of the valve chamber. A closing assembly is fixedly connected to the upper end of one side of the valve chamber. A third connecting pipe is fixedly connected to the other side of the valve chamber. A connecting assembly is sleeved on the outer side of the third connecting pipe. The closing assembly includes a telescopic cylinder disposed on one side of the valve chamber. A solenoid valve is fixedly connected to one side of the valve chamber. An output channel is provided on one side of the solenoid valve. An inlet / outlet air channel is provided on the other side of the solenoid valve. The other end of the inlet / outlet air channel is fixedly connected to the telescopic cylinder via an air supply pipe. The other end of the telescopic cylinder passes through the valve chamber and is fixedly connected to a closing plate. The closing plate is movably connected to the third connecting pipe.

[0006] As a preferred technical solution, the upper end of the valve chamber is provided with a closed screw hole, the upper end of the valve cover is provided with a closed through hole, a closed screw is inserted into the closed through hole, and the closed screw passes through the closed through hole and is threadedly connected to the closed screw hole.

[0007] As a preferred technical solution, a first sealing gasket is fixedly connected to the upper end of the valve chamber. The surface of the first sealing gasket has a through hole. The first sealing gasket is located at the fitting point between the valve chamber and the valve cover. A second sealing gasket is sleeved on the outer surface of the third connecting pipe. The second sealing gasket is located inside the connecting assembly.

[0008] As a preferred technical solution, the connecting assembly includes a connecting ring, the other end of which is fixedly connected to an installation edge, and a connecting screw is inserted into the surface of the installation edge, with a connecting nut threaded onto the outer surface of the connecting screw.

[0009] As a preferred technical solution, a mounting bracket is fixedly connected to one side of the valve chamber, the solenoid valve is located at the upper end of the mounting bracket, a fixing through hole is opened on the surface of the solenoid valve, a fixing screw is inserted into the fixing through hole, and the fixing screw passes through the fixing through hole and is threadedly connected to the mounting bracket.

[0010] As a preferred technical solution, the output end of the telescopic cylinder is fixedly connected to a fixing screw, the outer surface of the fixing screw is threaded with a first nut, the closing plate is inserted into the fixing screw, the outer surface of the fixing screw is threaded with a second nut, and the closing plate is located between the first nut and the second nut.

[0011] As a preferred technical solution, the first connecting pipe and the manual valve are threaded together. The outer surface of the first connecting pipe is provided with an external thread, and the inner side of the manual valve is provided with an internal thread. The internal thread and the external thread are threaded together.

[0012] In summary, the present invention has the following main advantages: When material needs to be cut off, the solenoid valve switches the air path to exhaust the telescopic cylinder. The closing plate resets under the driving force of the cylinder and tightly fits the third connecting pipe, thus cutting off the channel. The second connecting pipe can be used to clean residual materials in the valve chamber or assist in unloading. Driven by a telescopic cylinder and combined with the precise control of the air path by the solenoid valve, the response speed can reach 0.5-2 seconds / cycle, which is much faster than electric actuators. It can respond to changes in material flow on the production line in a timely manner, avoiding the risk of over-transport or leakage. The cylinder drive structure is simple and has few parts. Only the air source system needs to be drained periodically, the filter element replaced, and the seals checked. The maintenance cost is much lower than that of electric valves containing motors and reducers. The dust cover design, which is suitable for dusty environments, can protect the cylinder rod from contamination and extend its service life. The movable connection between the closing plate and the third connecting pipe, combined with the stable thrust of the cylinder, can achieve a double sealing effect of metal and elastic materials, effectively preventing dust from escaping and polluting the environment or causing negative pressure imbalance in the system. At the same time, it can prevent materials from accumulating and clumping in the dead corners of the valve body. It is especially suitable for dusty materials such as flour and chemical powder that are easy to fly and clog. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the valve chamber of this utility model; Figure 3 This is a utility model Figure 2 A schematic diagram of the side view structure; Figure 4 This is a schematic diagram of the valve cover of this utility model.

[0014] Reference numerals: 1. Valve chamber; 2. Valve cover; 3. First connecting pipe; 4. Manual valve; 5. Second connecting pipe; 6. Third connecting pipe; 7. Connecting assembly; 71. Connecting ring; 72. Mounting edge; 73. Connecting screw; 74. Connecting nut; 8. Closing assembly; 81. Telescopic cylinder; 82. Solenoid valve; 83. Output channel; 84. Inlet / outlet air channel; 85. Closing plate; 9. Fixing screw; 10. First nut; 11. Second nut; 12. Mounting bracket; 13. Fixing through hole; 14. Fixing screw; 15. Closing through hole; 16. Closing screw hole; 17. Closing screw; 18. First sealing gasket; 19. Through hole; 20. Second sealing gasket; 21. Connecting external thread; 22. Connecting internal thread. Detailed Implementation

[0015] Example refer to Figures 1 to 4The material intercepting valve for the dust material hopper in this embodiment includes a valve chamber 1. A valve cover 2 is fixedly connected to the upper end of the valve chamber 1. A first connecting pipe 3 is fixedly connected to the upper end of the valve cover 2. A manual valve 4 is provided on the outer surface of the first connecting pipe 3. A second connecting pipe 5 is fixedly connected to the lower end of one side of the valve chamber 1. A closing component 8 is fixedly connected to the upper end of one side of the valve chamber 1. A third connecting pipe 6 is fixedly connected to the other side of the valve chamber 1. A connecting component 7 is sleeved on the outer side of the third connecting pipe 6. The closing component 8 includes a telescopic cylinder 81 provided on one side of the valve chamber 1. A solenoid valve 82 is fixedly connected to one side of the valve chamber 1. An output channel 83 is provided on one side of the solenoid valve 82. An inlet and outlet air channel 84 is provided on the other side of the solenoid valve 82. The other end of the inlet and outlet air channel 84 is fixedly connected to the telescopic cylinder 81 through an air supply pipe. The other end of the telescopic cylinder 81 passes through the valve chamber 1 and is fixedly connected to a closing plate 85. The closing plate 85 is movably connected to the third connecting pipe 6.

[0016] refer to Figure 2 and Figure 4 The upper end of valve chamber 1 has a closed screw hole 16, and the upper end of valve cover 2 has a closed through hole 15. A closed screw 17 is inserted into the closed through hole 15, and the closed screw 17 passes through the closed through hole 15 and is threadedly connected to the closed screw hole 16. During assembly, first, accurately fasten valve cover 2 onto the upper end of valve chamber 1, so that the pre-set closed through hole 15 on valve cover 2 is aligned with the closed screw hole 16 at the upper end of valve chamber 1. This step requires ensuring that the hole positions are accurately matched to avoid subsequent installation difficulties or poor sealing due to misalignment. Insert the closing screw 17 into the closed through hole 15 above the valve cover 2 until the end of the screw passes through the through hole and extends to the closed screw hole 16 of the valve chamber 1. Then, rotate the closing screw 17 clockwise using a wrench or other tools. By using the meshing action of the thread on the outer surface of the screw and the thread inside the closed screw hole 16, the screw is gradually tightened, thereby firmly fixing the valve cover 2 to the valve chamber 1. The pre-tightening force of the threaded connection achieves a seal between the two, preventing dust materials from leaking from the connection between the valve chamber 1 and the valve cover 2.

[0017] refer to Figure 3 and Figure 4A first sealing gasket 18 is fixedly connected to the upper end of the valve chamber 1. A through hole 19 is formed on the surface of the first sealing gasket 18. The first sealing gasket 18 is located at the contact point between the valve chamber 1 and the valve cover 2. A second sealing gasket 20 is fitted onto the outer surface of the third connecting pipe 6. The second sealing gasket 20 is located inside the connecting assembly 7. The first sealing gasket 18 is fixedly connected to the upper end of the valve chamber 1 and is located at the contact point between the valve chamber 1 and the valve cover 2. When the valve cover 2 is tightened to the valve chamber 1 by the closing screw 17, the lower surface of the valve cover 2 will exert a uniform compressive force on the first sealing gasket 18, causing the sealing gasket to undergo elastic deformation, thereby filling any small gaps that may exist between the contact surfaces of the valve chamber 1 and the valve cover 2. Simultaneously, the through hole 19 on the surface of the first sealing gasket 18, the closing through hole 15 of the valve cover 2, and the closing through hole 15 of the valve chamber 1... The screw hole 16 is precisely aligned to ensure that the closing screw 17 can pass through smoothly and complete the connection. This does not affect the assembly operation and can completely seal the gap at the connection point through the deformation of the sealing gasket, effectively preventing dust in the valve chamber 1 from escaping from the connection between the valve chamber 1 and the valve cover 2. As for the second sealing gasket 20, it is sleeved on the outer surface of the third connecting pipe 6 and is located inside the connecting assembly 7. When the connecting assembly 7 connects and fixes the third connecting pipe 6 to the subsequent conveying pipeline, the inner wall of the connecting assembly 7 will form radial compression on the second sealing gasket 20, causing the sealing gasket to fit tightly against the outer surface of the third connecting pipe 6 and the inner wall of the connecting pipeline, filling the fit gap when the two are connected, and preventing dust from leaking from the connection between the third connecting pipe 6 and the connecting equipment or entering the interior of the connecting assembly 7 during the conveying process, causing component wear.

[0018] refer to Figures 1-3 The connecting component 7 includes a connecting ring 71, with a mounting edge 72 fixedly connected to the other end of each connecting ring 71. A connecting screw 73 is inserted into the surface of each mounting edge 72, and a connecting nut 74 is threaded onto the outer surface of the connecting screw 73. When it is necessary to connect to an external pipe, the interface end of the external pipe is aligned with the third connecting pipe 6, so that the mounting edge 72 at the other end of the connecting ring 71 fits against the interface of the external pipe. At this time, the preset hole on the surface of the mounting edge 72 corresponds precisely to the mounting hole of the external pipe interface. Then, the connecting screw 73 is inserted through the corresponding hole of the mounting edge 72 and the external interface in sequence, ensuring that both ends of the screw extend out of the mounting structure. Next, the connecting nut 74 is screwed onto the outer surface of the connecting screw 73. The nut is rotated clockwise using a wrench or other tools, and the axial preload is generated by the thread engagement between the nut and the screw, so that the mounting edge 72 is tightly pressed against the interface of the external pipe. At the same time, the inner second sealing gasket 20 is squeezed to undergo elastic deformation, filling the docking gap.

[0019] refer to Figure 2A mounting bracket 12 is fixedly connected to one side of the valve chamber 1. The solenoid valve 82 is located at the upper end of the mounting bracket 12. A fixing through hole 13 is opened on the surface of the solenoid valve 82. A fixing screw 14 is inserted into the fixing through hole 13. The fixing screw 14 passes through the fixing through hole 13 and is threadedly connected to the mounting bracket 12. First, the mounting bracket 12, which is pre-fixed to one side of the valve chamber 1, provides a dedicated mounting base for the solenoid valve 82. During assembly, the solenoid valve 82 is placed on the upper end of the mounting bracket 12. It is necessary to ensure that the bottom of the solenoid valve 82 is in close contact with the surface of the mounting bracket 12. At the same time, the fixing through hole 13 opened on the surface of the solenoid valve 82 is precisely aligned with the pre-set threaded hole on the mounting bracket 12. This step is the key to ensuring that the solenoid valve 82 is installed firmly and that the subsequent air circuit connection is smooth, so as to avoid the installation being crooked or the air circuit interface being stressed due to the misalignment of the holes.

[0020] refer to Figure 2 The output end of the telescopic cylinder 81 is fixedly connected to a fixing screw 9. A first nut 10 is threaded onto the outer surface of the fixing screw 9. The closing plate 85 is inserted into the fixing screw 9. A second nut 11 is threaded onto the outer surface of the fixing screw 9. The closing plate 85 is located between the first nut 10 and the second nut 11. During assembly, the first nut 10 is first threaded onto the outer surface of the fixing screw 9, which is fixed at the output end of the telescopic cylinder 81, and then tightened clockwise until it fits against the end face of the cylinder output end. This provides an initial positioning reference for the closing plate 85. Then, the pre-set mounting holes on the closing plate 85 are connected to the fixing screw 9. Align the fixed screw 9 so that the closing plate 85 is inserted into the upper end face of the first nut 10 along the axis of the fixed screw 9, ensuring that the closing plate 85 is coaxial with the screw and fits tightly; then put the second nut 11 on the part of the fixed screw 9 that extends out of the closing plate 85, and rotate the second nut 11 clockwise until it is tightly pressed against the upper end face of the closing plate 85. Through the bidirectional clamping force of the first nut 10 and the second nut 11 on the upper and lower surfaces of the closing plate 85, the closing plate 85 is firmly locked on the fixed screw 9, forming a stable connection structure of cylinder output end, first nut 10, closing plate 85 and second nut 11.

[0021] refer to Figure 4 The first connecting pipe 3 and the manual valve 4 are threaded together. The outer surface of the first connecting pipe 3 is provided with an external thread 21, and the inner side of the manual valve 4 is provided with an internal thread 22. The internal thread 22 and the external thread 21 are threaded together. During the assembly stage, the internal thread 22 on the inner side of the manual valve 4 is aligned with the external thread 21 on the outer surface of the first connecting pipe 3. Then, the manual valve 4 is rotated clockwise. By utilizing the mutual meshing of the internal thread 22 and the external thread 21, the manual valve 4 is gradually tightened along the axis of the first connecting pipe 3 until the valve and the pipe connection are tightly fitted. This achieves a stable assembly of the two and initially prevents dust leakage from the connection gap through the sealing of the threaded fit.

[0022] Operating principle and advantages: The dusty material in the hopper first enters the valve chamber 1 through the first connecting pipe 3 at the upper end of the valve cover 2. The manual valve 4 on the outer surface of the first connecting pipe 3 can be used as an auxiliary control component. By rotating the handwheel to adjust the opening and closing degree of the valve core, the feed flow rate can be finely adjusted or the feed can be cut off in an emergency. After the material enters the valve chamber 1, it is controlled by the closing component 8 to whether it is conveyed to the third connecting pipe 6. When it is necessary to discharge the material, the solenoid valve 82 receives the control signal and supplies air to the telescopic cylinder 81 through the air inlet and outlet channels 84 and the air delivery pipe. The output end of the telescopic cylinder 81 pushes the closing plate 85 away from the opening of the third connecting pipe 6, and the material then flows out through the third connecting pipe 6. The connecting component 7 on the outside of the third connecting pipe 6... It can be stably connected to external conveying pipelines. When material needs to be cut off, the solenoid valve 82 switches the air path to exhaust and reset the telescopic cylinder 81. Under the driving force of the cylinder, the closing plate 85 tightly fits the opening of the third connecting pipe 6, realizing the reliable cut-off of the material channel. The second connecting pipe 5 at the lower end of one side of the valve chamber 1 can be used to discharge residual dust materials in the valve chamber 1 during equipment maintenance or cleaning, avoiding material accumulation and agglomeration. Throughout the process, the closing component 8 realizes the automatic and precise control of dust material flow through the linkage of the solenoid valve 82 and the telescopic cylinder 81. With the auxiliary adjustment of the manual valve 4 and the cleaning function of the second connecting pipe 5, the stable and efficient operation of the material cutting valve in the dust material conveying scenario is ensured.

Claims

1. A material shut-off valve for a hopper specifically designed for dusty materials, characterized in that: The device includes a valve chamber, with a valve cover fixedly connected to the upper end of the valve chamber. A first connecting pipe is fixedly connected to the upper end of the valve cover, and a manual valve is provided on the outer surface of the first connecting pipe. A second connecting pipe is fixedly connected to the lower end of one side of the valve chamber, and a closing assembly is fixedly connected to the upper end of one side of the valve chamber. A third connecting pipe is fixedly connected to the other side of the valve chamber, and a connecting assembly is sleeved on the outer side of the third connecting pipe. The closing assembly includes a telescopic cylinder disposed on one side of the valve chamber. A solenoid valve is fixedly connected to one side of the valve chamber, and an output channel is provided on one side of the solenoid valve. An inlet and outlet channel is provided on the other side of the solenoid valve. The other end of the inlet and outlet channel is fixedly connected to the telescopic cylinder through an air supply pipe. The other end of the telescopic cylinder passes through the valve chamber and is fixedly connected to a closing plate. The closing plate is movably connected to the third connecting pipe.

2. The material shut-off valve for a dust-specific hopper according to claim 1, characterized in that: The valve chamber has a closed screw hole at its upper end, and the valve cover has a closed through hole at its upper end. A closed screw is inserted into the closed through hole, and the closed screw passes through the closed through hole and is threadedly connected to the closed screw hole.

3. The material shut-off valve for a dust-specific hopper according to claim 1, characterized in that: A first sealing gasket is fixedly connected to the upper end of the valve chamber. A through hole is provided on the surface of the first sealing gasket. The first sealing gasket is located at the fitting point between the valve chamber and the valve cover. A second sealing gasket is sleeved on the outer surface of the third connecting pipe. The second sealing gasket is located inside the connecting assembly.

4. The material shut-off valve for a dust-specific hopper according to claim 1, characterized in that: The connecting assembly includes a connecting ring, and each connecting ring has a mounting edge fixedly connected to its other end. Each mounting edge has a connecting screw inserted into its surface, and the outer surface of the connecting screw is threaded with a connecting nut.

5. The material shut-off valve for a dust-specific hopper according to claim 1, characterized in that: A mounting bracket is fixedly connected to one side of the valve chamber. The solenoid valve is located at the upper end of the mounting bracket. A fixing through hole is opened on the surface of the solenoid valve. A fixing screw is inserted into the fixing through hole and is threaded through the fixing through hole to the mounting bracket.

6. The material shut-off valve for a dust-specific hopper according to claim 1, characterized in that: The output end of the telescopic cylinder is fixedly connected to a fixing screw, and the outer surface of the fixing screw is threaded with a first nut. The closing plate is inserted into the fixing screw, and the outer surface of the fixing screw is threaded with a second nut. The closing plate is located between the first nut and the second nut.

7. The material shut-off valve for a dust-specific hopper according to claim 1, characterized in that: The first connecting pipe is threadedly connected to the manual valve. The outer surface of the first connecting pipe is provided with an external thread, and the inner side of the manual valve is provided with an internal thread. The internal thread and the external thread are threadedly connected to each other.

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