Pneumatic feed valve for pneumatic powder conveying

Abstract

The utility model provides a pneumatic feeding valve for pneumatic powder conveying. The pneumatic feeding valve comprises a feeding valve body, a speed regulating valve body and a pneumatic control assembly. The pneumatic control assembly comprises a valve rod, a rocker arm, an air cylinder actuator, a rotating shaft and a valve clack, and the valve rod is arranged in the feeding valve body and connected with the feeding valve body through the rotating shaft; the rocker arm is connected with the air cylinder actuator and connected with the feeding valve body through a rotating shaft, and the valve clack is arranged on the side, close to an inlet of the feeding valve body, of the valve rod. The speed regulating valve body is fixed on the outlet side of the feeding valve body; a cavity is formed in the middle of the speed regulating valve body, a guide groove is formed in the top of one side in the cavity, a guide rod is fixedly connected to the inner wall of the guide groove, a sliding block is slidably connected to the guide rod, a baffle is rotationally connected to the lower end of the sliding block, and the other end of the baffle is rotationally connected to the nut sleeve; the nut sleeve is arranged on the transmission screw in a threaded and sleeving mode. And the transmission screw rod is rotationally arranged in the cavity. According to the utility model, speed-regulating feeding of powder pneumatic conveying is realized, and reliable operation of a powder pneumatic conveying system is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic conveying equipment, in particular to a pneumatic feed valve for pneumatic conveying of powders. Background Art

[0002] During the pneumatic conveying of powders, the primary conveying equipment is often a positive displacement silo pump, and both require a feed valve for pneumatic powder conveying, a crucial component in the system. However, during automatic ash conveying, leaks can easily occur. When the silo pump pressurizes the ash, it flushes the gap between the valve discs, causing damage to the dome discs. This necessitates extensive overhaul and maintenance, which can have a detrimental impact on the operation of the pneumatic powder conveying system. The most commonly used valve for regulating powder flow rates is a butterfly valve, but a drawback of butterfly valves is that their fluid flow rate adjustment range is limited by the disc structure. This makes it impossible to reduce high-speed powder conveying from a rapid state to a low-speed state. To address this issue, we propose a pneumatic feed valve for pneumatic powder conveying. Utility Model Content

[0003] In view of the problems in the prior art, the utility model proposes a pneumatic feed valve for pneumatic conveying of powders, which realizes the speed-regulated feeding of the pneumatic conveying of powders and ensures the reliable operation of the pneumatic conveying system of powders.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A pneumatic feed valve for pneumatic conveying of powders, comprising:

[0006] Feed valve body;

[0007] The pneumatic control assembly includes a valve stem, a rocker arm, a cylinder actuator, a rotating shaft, and a valve disc. The valve stem is arranged inside the feed valve body and connected to the rotating shaft on the outer wall of the feed valve body. One end of the rocker arm is connected to the output end of the cylinder actuator, and the other end is connected to the valve body through the rotating shaft. The valve disc is arranged on the side of the valve stem close to the inlet of the feed valve body.

[0008] The speed regulating valve body is fixed on the outlet side of the feed valve body; a cavity is opened in the middle of the speed regulating valve body, a guide groove is opened on the top of one side of the cavity, a guide rod is fixedly connected to the inner wall of the guide groove, a slider is slidably connected to the guide rod, the lower end of the slider is rotatably connected to a baffle, and the other end of the baffle is rotatably connected to the nut sleeve; the outside of the socket end of the cavity is rotatably connected to the transmission screw through the socket fixing disk, one end of the transmission screw is rotatably installed in the cavity, and the other end passes through the socket fixing disk to connect the wheel disc; wherein, the nut sleeve is threadedly sleeved on the transmission screw.

[0009] As a further improvement of this solution, the valve stem and the valve disc are connected by a clamping device, which includes a clamping block, one end of which is fixedly connected to the valve stem and the other end of which is fixedly connected to the valve disc. A spring is provided inside the clamping block, which maintains a compressed state, with one end of the spring contacting the valve stem and the other end pressing against the valve disc.

[0010] As a further improvement of this solution, the speed regulating valve body, the socket fixing plate and the transmission screw are sealed by a sealing member.

[0011] As a further improvement of this solution, the baffle is a rectangular baffle.

[0012] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention fundamentally solves the problems of sealing and wear resistance of the feed valve in the pneumatic conveying system through the pneumatic rotary feed valve and its unique planar rotary valve core structure. At the same time, its unique valve core rotary connecting rod mechanism greatly improves the service life of the pneumatic actuator. It ensures the reliable operation of the pneumatic conveying system. By rotating the wheel of the speed regulating valve body, the wheel drives the screw to rotate, and the nut sleeve moves up and down with the rotation of the screw. The nut sleeve drives the baffle to rotate while moving, making the angle between the baffle and the horizontal plane adjustable, realizing the control of the powder flow rate in the valve, and the flow through the valve cavity can be adjusted and controlled without the need for additional specific regulating valves, thereby saving costs to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a side view structural diagram of the utility model;

[0016] Figure 3 This is a schematic diagram of the top view of the feed valve body of the utility model;

[0017] Figure 4 This is an enlarged schematic diagram of the compacting device of the present utility model;

[0018] Figure 5 This is a schematic diagram of the three-dimensional structure of the speed regulating valve body of the utility model.

[0019] Markings in the figure: 1. Feed valve body; 2. Valve disc; 3. Valve stem; 4. Rotating shaft; 5. Rocker arm; 6. Cylinder actuator; 7. Speed ​​control valve body; 8. Guide groove; 9. Slider; 10. Guide rod; 11. Baffle; 12. Nut sleeve; 13. Drive screw; 14. Socket fixing plate; 201. Spring; 202. Clamping block; 701. Cavity; 131. Disc. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example 1

[0022] like Figure 1-5 As shown, this embodiment provides a pneumatic feed valve for pneumatic conveying of powders, comprising a feed valve body 1 , an air control component and a speed regulating valve body 7 .

[0023] The feed valve body 1 includes two upper and lower valve bodies, which are connected by fasteners. The feed valve body 1 is made of high-quality tungsten alloy, and its thermal expansion coefficient is basically the same as that of steel material. The inner lining layer will not fall off due to low bonding strength or large difference in thermal expansion coefficient.

[0024] The pneumatic control component includes a valve stem 3, a rocker arm 5, a cylinder actuator 6, a rotating shaft 4 and a valve disc 2. The valve stem 3 is arranged inside the feed valve body 1 and is connected to the rotating shaft 4 on the outer wall of the feed valve body 1; one end of the rocker arm 5 is connected to the output end of the cylinder actuator 6, and the other end is connected to the valve body 1 through the rotating shaft 4. The valve disc 2 is arranged on the side of the valve stem 3 close to the inlet of the feed valve body 1.

[0025] During operation, the cylinder actuator 6 drives the reciprocating motion of the rocker arm 5 through remote control, and the rocker arm 5 drives the rotating shaft 4 connected and fixed to its four sides to rotate, thereby driving the valve stem 3 and the valve disc 2 to rotate in the valve body to realize the opening and closing of the feed valve.

[0026] The speed regulating valve body 7 is fixed to the outlet side of the feed valve body 1. A cavity 701 is defined in the center of the speed regulating valve body 7. A guide groove 8 is defined at the top of one side of the cavity 701. A guide rod 10 is fixedly connected to the inner wall of the guide groove 8. A slider 9 is slidably connected to the guide rod 10. The lower end of the slider 9 is rotatably connected to a baffle 11, and the other end of the baffle 11 is rotatably connected to a nut sleeve 12. A drive screw 13 is rotatably inserted into the external socket end of the cavity 701 through a socket fixing plate 14. One end of the drive screw 13 is rotatably mounted within the cavity 701, and the other end passes through the socket fixing plate 14 to connect to a wheel 131. The nut sleeve 12 is threadedly mounted on the drive screw 13. Specifically, the speed regulating valve body 7, the socket fixing plate 14, and the drive screw 13 are sealed by a seal. The baffle 11 is a rectangular baffle.

[0027] During operation, by rotating the wheel 131, the transmission screw 13 is driven to rotate. At this time, the nut sleeve 12 moves up and down on the transmission screw 13. The nut sleeve 12 will drive the baffle 11 to rotate while moving. At the same time, the slider 9 will guide the baffle 11. In this way, the angle between the baffle 11 and the horizontal plane can be adjusted. Therefore, the baffle 11 can adjust and control the powder flow through the cavity 701 without the need for additional specific regulating valves.

[0028] In summary, the cylinder actuator 6 rotates the shaft 4 via the rocker arm 5, thereby swinging the valve stem 3 and causing the valve disc 2 mounted on the valve stem 3 to rotate between fully open and fully closed positions, thereby opening and closing the feed valve. The sealing ring embedded in the valve disc 2 is made of a wear-resistant ceramic material, and the spring embedded in the valve stem 3 and connected to the valve disc 2 compensates for thermal expansion and contraction between components, thereby improving service life and sealing performance. The pneumatic rotary feed valve, with its unique planar rotating valve core structure, fundamentally solves the sealing and wear resistance issues of feed valves in pneumatic conveying systems. Furthermore, its unique valve core rotating connecting rod mechanism significantly increases the service life of the pneumatic actuator.

[0029] By rotating the disc on the speed regulating valve body, the disc drives the screw to rotate, and the nut sleeve moves up and down as the screw rotates. The nut sleeve also drives the baffle to rotate while moving, so that the angle between the baffle and the horizontal plane can be adjusted, thereby achieving control of the flow rate of powder in the valve and adjusting and controlling the flow through the valve cavity without the need for additional special regulating valves, thereby saving costs to a certain extent.

[0030] Example 2

[0031] This embodiment provides a pneumatic feed valve for pneumatic conveying of powders, the structure of which is substantially the same as that of embodiment 1, except that, based on embodiment 1, this embodiment further discloses that the valve stem 3 and the valve disc 2 are connected by a clamping device, the clamping device comprising a clamping block 202, one end of which is fixedly connected to the valve stem 3 and the other end of which is fixedly connected to the valve disc 2. A spring 201 is provided inside the clamping block 202, the spring 201 being maintained in a compressed state, with one end of the spring 201 contacting the valve stem 3 and the other end supporting the valve disc 2. When the feed valve is closed, the sealing surface of the valve disc 2 is tightly coupled to the sealing surface of the feed valve body 1 by means of the clamping device, and the elastic force of the spring 201 always presses the valve disc 2 against the sealing surface of the feed valve body 1.

[0032] The above content is merely an example of the structure of the present invention. Technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A pneumatic feed valve for pneumatic conveying of powders, characterized in that: include: Feed valve body (1); An air control assembly comprises a valve stem (3), a rocker arm (5), a cylinder actuator (6), a rotating shaft (4) and a valve flap (2); the valve stem (3) is arranged inside the feed valve body (1) and connected to the rotating shaft (4) on the outer wall of the feed valve body (1); one end of the rocker arm (5) is connected to the output end of the cylinder actuator (6), and the other end is connected to the feed valve body (1) through the rotating shaft (4); the valve flap (2) is arranged on the valve stem (3) near the inlet side of the feed valve body (1); The speed regulating valve body (7) is fixed on the outlet side of the feed valve body (1); a cavity (701) is provided in the middle of the speed regulating valve body (7); a guide groove (8) is provided on the top of one side of the cavity (701); a guide rod (10) is fixedly connected to the inner wall of the guide groove (8); a slider (9) is slidably connected to the guide rod (10); the lower end of the slider (9) is rotatably connected to a baffle (11); the other end of the baffle (11) is rotatably connected to a nut sleeve (12); the outside of the socket end of the cavity (701) is rotatably plugged into a transmission screw (13) through a socket fixing disk (14); one end of the transmission screw (13) is rotatably installed in the cavity (701), and the other end passes through the socket fixing disk (14) to connect to a wheel disc (131); wherein the nut sleeve (12) is threadedly sleeved on the transmission screw (13).

2. A pneumatic feed valve for powder pneumatic conveying according to claim 1, characterized in that: The valve stem (3) and the valve disc (2) are connected via a clamping device, wherein the clamping device comprises a clamping block (202), one end of the clamping block (202) is fixedly connected to the valve stem (3), and the other end is fixedly connected to the valve disc (2), and a spring (201) is provided inside the clamping block (202), and the spring (201) is kept in a compressed state, with one end of the spring (201) contacting the valve stem (3) and the other end pressing against the valve disc (2).

3. The pneumatic feed valve for powder pneumatic conveying according to claim 1, characterized in that: The speed regulating valve body (7), the socket fixing plate (14) and the transmission screw (13) are sealed by a sealing member.

4. The pneumatic feed valve for powder pneumatic conveying according to claim 1, characterized in that: The baffle (11) is a rectangular baffle.

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