Air volume adjusting valve for powder concentrator

Abstract

The utility model belongs to the technical field of air volume regulating valves of powder selecting machines, and discloses an air volume regulating valve for a powder selecting machine, which is characterized in that a proportional electromagnetic valve is fixedly arranged at the upper part of a mounting plate; the limiting mechanism is fixedly arranged on the left side of the rotating shaft head; the fixed mounting plate is fixedly arranged at the bottom of the rear end of the left side of the fixed plate; short shafts are fixedly arranged on the left and right end surfaces of the hydraulic cylinder fixing barrel, the short shaft at the left end of the hydraulic cylinder fixing barrel is fixed with the left side surface of the fixed mounting plate close to the upper center, and the short shaft at the right end of the hydraulic cylinder fixing barrel is fixed with the left side surface of the fixed plate; and the hydraulic driving device is fixedly arranged at the bottoms of the proportional electromagnetic valve and the rotating shaft head. The air volume adjusting valve has the advantages that by arranging the valve plate, the valve plate fixing body, the overturning shaft, the rotating shaft head, the proportional electromagnetic valve, the limiting mechanism and the hydraulic driving device, the rotating driving force on the valve plate is increased, the resistance of large-pressure air volume is easily overcome, and the failure rate of the air volume adjusting valve is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of air volume regulating valves for powder classifiers, and particularly relates to an air volume regulating valve for a powder classifier. Background Art

[0002] Powder separators are mainly categorized as cyclone separators, three-separation separators, and centrifugal separators. The function of a separator is to classify and screen powders of varying particle sizes. The production and processing of fused chromium oxide products typically involves smelting and crushing. During crushing, the material is broken down into pellets smaller than 4 mm. A portion of these pellets is then ground to produce a finer powder for use. This finer powder is then combined with other pellets of varying sizes to produce finished refractory bricks. However, the crushing process also produces some powder smaller than 1 mm, which is then re-ground in the next grinding step. Furthermore, since dust removal is required during crushing, the powder smaller than 1 mm collected by the dust collector is difficult to fully utilize, resulting in wasted resources. Therefore, to avoid re-grinding the powder in the pellets and to avoid wasting the dust in the removed powder, a separator is required to classify these different sizes.

[0003] The powder classifier processes powder materials by grading them mainly by controlling the air volume and the speed of the main motor to control the particle size of the powder materials for classification. In particular, precise control of the air volume is a key equipment parameter for achieving powder grading and screening. In order to achieve precise control of the air volume of the powder classifier, a regulating valve that can accurately control and adjust the air volume is required. Since the pressure (flow rate) of the air volume of the powder classifier is relatively high, in order to overcome the high-pressure air volume, sufficient driving force to flip the valve plate is required, and then the air volume can be accurately adjusted. In the prior art, the main technical problem with the air volume regulating valve is that the air volume regulating valve currently used mainly controls the flipping of the valve plate through a cylinder. The driving force of the cylinder is limited and cannot overcome the resistance of the high-pressure air volume, causing the cylinder to malfunction due to overload. Based on the above-mentioned technical defects in the prior art, the inventor has developed an air volume regulating valve for a powder classifier, which can well solve the above-mentioned technical problems existing in the prior art. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an air volume regulating valve for a powder classifier, which has a simple structure, a scientific and reasonable design, and greatly improves the driving force for the flipping of the valve plate of the regulating valve; the utility model can solve the technical problem in the prior art that the cylinder controls the valve plate of the regulating valve and the driving force for the flipping is insufficient.

[0005] The technical solution adopted by the utility model is: an air volume regulating valve for a powder classifier, comprising a fixing frame 1, a flange 2, and a valve cylinder 3. The fixing frame 1 is symmetrically fixed at the bottom position of the valve cylinder 3, and the flange 2 is symmetrically fixed on the end surface of the valve cylinder 3 in front and back; the valve cylinder 3 is hollow cylindrical, and the valve plate 4 is a circular plate. A valve plate fixing body 5 is fixed on the rear side of the valve plate 4. The valve plate fixing body 5 is a hollow circular shape, and the shaft seat 6 is symmetrically arranged at the middle position of the left and right sides of the valve cylinder 3. The flip shaft 7 passes through the center of the valve plate fixing body 5 to install the valve plate 4 and the valve plate fixing body 5 in the radial middle position of the valve cylinder 3. The two ends of the flip shaft 7 are installed on the shaft seats 6 arranged symmetrically on the left and right. The left end of the flip shaft 7 passes through the shaft seat 6 and extends to the outside of the shaft seat 6. The rotating shaft head 8 is fixed at the leftmost end position of the flip shaft 7; the fixing plate 9 is vertically fixed on the flip shaft 7 on the right side of the rotating shaft head 8, and the fixing plate 9 is a plate with an arc shape at one end and a square shape at the other end. The mounting plate 10 is fixed at 90° to the upper rear part of the fixed plate 9, and a proportional solenoid valve 11 is fixedly provided on the upper part of the mounting plate 10, and the proportional solenoid valve 11 is used to provide precise high-pressure hydraulic oil to the hydraulic drive device 16; the limit mechanism 12 is fixedly provided at the left position of the rotating shaft head 8, and the limit mechanism 12 is used to sense the flip position of the valve plate 4; the fixed mounting plate 13 is fixedly provided at the bottom position of the left rear end of the fixed plate 9, and the fixed mounting plate 13 is used to install the hydraulic drive device 16; the left and right end faces of the hydraulic cylinder fixed tube 14 are fixed with short shafts 15, and the short shaft 15 at the left end of the hydraulic cylinder fixed tube 14 is fixed to the left side of the fixed mounting plate 13 near the upper center, and the short shaft 15 at the right end of the hydraulic cylinder fixed tube 14 is fixed to the left side of the fixed plate 9; the hydraulic drive device 16 is fixedly provided at the bottom position of the proportional solenoid valve 11 and the rotating shaft head 8, and the hydraulic drive device 16 is used to provide rotational driving force to the flip shaft 7.

[0006] The fixing frame 1 is fixedly connected to one side of the mounting frame of the air duct; the inner diameter of the flange 2 is equal to the diameter of the air duct, and the flange 2 is docked with the fixed flange on the air duct for fixedly installing the regulating valve.

[0007] The diameter of the valve plate fixing body 5 is smaller than that of the valve plate 4 , and the diameter of the valve plate 4 is smaller than that of the valve cylinder 3 . The valve plate 4 and the valve plate fixing body 5 are turned over inside the valve cylinder 3 by rotating the turning shaft 7 .

[0008] The proportional solenoid valve 11 includes a proportional solenoid valve body 111. An oil supply hole 112 and an oil outlet hole 113 are opened at the centers of the front and rear end faces of the proportional solenoid valve body 111. The oil supply hole 112 is set at the center of the rear end face of the proportional solenoid valve body 111, and the oil outlet hole 113 is set at the center of the front end face of the proportional solenoid valve body 111. The oil supply hole 112 and the oil outlet hole 113 are connected to the interior of the proportional solenoid valve body 111.

[0009] The limiting mechanism 12 includes a follower limiting plate 121, which is fish-shaped. The middle position of the follower limiting plate 121 is fixed to the left front end of the rotating shaft head 8 near the bottom, and the front end of the follower limiting plate 121 is fixed to the left front end of the hydraulic drive device 16 near the upper position; the limiting column 122 is vertically fixed to the right position of the rear end of the follower limiting plate 121, and the sensing fixing plate 123 is fixedly set on the left side of the fixing plate 9 at the bottom of the mounting plate 10. The left side of the sensing fixing plate 123 is vertically fixed with a proximity switch mounting plate 124, and the proximity switch 125 is longitudinally installed in the center position of the proximity switch mounting plate 124.

[0010] The fixed mounting plate 13 is L-shaped, and the short shafts 15 fixedly arranged on the left and right end surfaces of the hydraulic cylinder fixing tube 14 are arranged symmetrically.

[0011] The hydraulic drive device 16 includes a hydraulic cylinder 161, which is longitudinally fixed and sleeved in the hydraulic cylinder fixing tube 14, and the oil inlet end 162 is arranged at the upper rear end of the hydraulic cylinder 161, and the oil outlet end 163 is arranged at the upper front end of the hydraulic cylinder 161. The oil inlet end 162 and the oil outlet end 163 are connected to the interior of the hydraulic cylinder 161; the hinge head 164 is fixedly arranged at the front right position of the fixed mounting plate 13, and the rear end of the hinge head 164 is fixedly connected to the telescopic rod of the hydraulic cylinder 161; the arc plate 165 is arranged symmetrically on the left and right, and the bottom of the arc plate 165 arranged symmetrically on the left and right is installed on the front side of the hinge head 164, and is fixedly hinged to the body of the hinge head 164 through an axle pin; the rear end of the connecting plate 166 is fixedly connected to the front side of the rotating shaft head 8, and the front end of the connecting plate 166 is installed on the upper part of the arc plate 165 arranged symmetrically on the left and right, and is fixedly hinged by an axle pin.

[0012] The oil delivery hole 112 is fixedly connected to the oil pump output end of the hydraulic station through a high-pressure oil pipe, the oil outlet hole 113 is fixedly connected to the oil inlet end of the hydraulic cylinder 161 through a high-pressure oil pipe, and the oil outlet end 163 is fixedly connected to the hydraulic station tank through a high-pressure oil pipe.

[0013] The front end of the follow-up limiting plate 121 is fixed to the upper left side of the arc-shaped plate 165 that is symmetrically arranged on the left and right; the sensing head of the proximity switch 125 corresponds to the limiting column 122.

[0014] The proximity switch 125 is fixedly connected to the PLC control module of the powder classifier control system through a signal line, and the proportional solenoid valve body 111 is fixedly connected to the PLC control module of the powder classifier control system through a signal line.

[0015] The working process of the air volume regulating valve for the powder classifier is as follows: when the air volume of the powder classifier needs to be adjusted, the PLC control module of the powder classifier control system controls the opening of the proportional solenoid valve 11 according to the set driving amount, thereby quantitatively delivering high-pressure hydraulic oil to the hydraulic cylinder of the hydraulic drive device 16, and the hydraulic oil is delivered to the proportional solenoid valve body 111 through the oil delivery hole 112 of the proportional solenoid valve 11 by the hydraulic pump of the hydraulic station, and is proportionally distributed through the proportional solenoid valve body 111, and the hydraulic oil is delivered from the oil inlet end 162 of the hydraulic cylinder 161 to the hydraulic cylinder 161 through the oil outlet hole 113. Under the high-pressure drive of the hydraulic oil, the telescopic rod of the hydraulic cylinder 161 is pushed out (the hydraulic oil after work flows back to the oil tank of the hydraulic station through the oil outlet end 163), pushing the hinged joint 164 to move forward, and under the push of the intersection 164, the arc plate 165 and the connecting plate 166 move upward, so that the rotating shaft head 8 rotates, and under the rotation of the rotating shaft head 8, the rotating shaft 7 is driven to rotate. The shaft seat 6 is a rotating support for rotating action (at the same time driving the follower limit plate 121 of the limit mechanism 12 to rotate synchronously), and the rotation of the rotating shaft 7 drives the valve plate body 5 and the valve plate 4 to rotate, so that the valve plate 4 rotates in the valve cylinder 3, thereby realizing the adjustment of the air volume; when the rotating shaft head 8 limits the follower limit plate 121 of the limit mechanism 12 to the position of the proximity switch 125, the limit column 122 corresponds to the sensing head of the proximity switch 125. After the proximity switch 125 senses the position signal of the limit column 122 (at this time the opening of the valve plate 4 is maximum), it sends a position signal to the PLC control module. After receiving the signal, the PLC control module simultaneously sends a closing control instruction to the proportional solenoid valve 11. The proportional solenoid valve 11 stops supplying the hydraulic cylinder of the hydraulic drive device 16 and stops working. At this time, the opening of the valve plate 4 is maximum, and the air volume of the corresponding powder classifier is maximum; the air volume is reduced by repeating the above-mentioned opposite action to reduce the rotation opening of the valve plate 4, thereby realizing the reduction of the air volume.

[0016] The beneficial effects of the utility model are: through the arrangement of the valve plate, valve plate fixing body, flip shaft, rotating shaft head, proportional solenoid valve, limit mechanism, and hydraulic drive device, the rotational driving force of the valve plate is increased, the resistance of high pressure air volume is easily overcome, and the failure rate of the air volume regulating valve is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 For this utility model Figure 1A-direction cross-section;

[0019] Figure 3 This is a schematic diagram of the structure of the utility model when viewed from above;

[0020] Markings in the figure: 1. Fixed bracket, 2. Flange, 3. Valve cylinder, 4. Valve plate, 5. Valve plate fixed body, 6. Shaft seat, 7. Flip shaft, 8. Rotating shaft head, 9. Fixed plate, 10. Mounting plate, 11. Proportional solenoid valve, 111. Proportional solenoid valve body, 112. Oil delivery hole, 113. Oil outlet hole, 12. Limiting mechanism, 121. Follow-up limiting plate, 122. Limiting column, 123. Induction fixing plate, 124. Proximity switch mounting plate, 125. Proximity switch, 13. Fixed mounting plate, 14. Hydraulic cylinder fixing cylinder, 15. Short shaft, 16. Hydraulic drive device, 161. Hydraulic cylinder, 162. Oil inlet end, 163. Oil outlet end, 164. Articulated joint, 165. Arc plate, 166. Connecting plate. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is further described in detail below with reference to the accompanying drawings.

[0022] The utility model provides an air volume regulating valve for a powder separator:

[0023] like Figure 1 、 2 As shown in Figures 3 and 4, a fixing bracket 1 is symmetrically fixed to the bottom of the valve cylinder 3, and a flange 2 is symmetrically fixed to the end surface of the valve cylinder 3. The fixing bracket 1 is fixedly connected to the powder classifier air duct mounting bracket, and the flange 2 is fixedly connected to the valve cylinder 3 and the flange 2 on the air duct, respectively. A flexible sealing gasket is also added to the flange 2. The coordinated fixing action of the fixing bracket 1 and the flange 2 improves the installation stability of the valve cylinder 3 and enhances the sealing performance of the fixed connection between the valve cylinder 3 and the air duct.

[0024] like Figure 2 As shown, the valve cylinder 3 is hollow and cylindrical, the valve plate 4 is a circular plate, and a valve plate fixing body 5 is fixedly mounted on the rear side of the valve plate 4. The valve plate fixing body 5 is hollow and circular. The aforementioned fixing of the valve plate fixing body 5 to the rear side of the valve plate 4 and the hollow and circular shape of the valve plate fixing body 5 provide a fixed support for the fixed installation of the tilt shaft 7. Furthermore, the weight of the valve plate 3 can be reduced, thereby reducing the driving rotation load of the hydraulic cylinder 161.

[0025] like Figure 1As shown in FIG3 , the shaft seat 6 is symmetrically arranged at the middle position of the left and right sides of the valve cylinder 3. The flip shaft 7 passes through the center of the valve plate fixing body 5 to install the valve plate 4 and the valve plate fixing body 5 at the radial middle position of the valve cylinder 3. The two ends of the flip shaft 7 are installed on the shaft seat 6 symmetrically arranged. The left end of the flip shaft 7 passes through the shaft seat 6 and extends to the outside of the shaft seat 6. The rotating shaft head 8 is fixedly arranged at the leftmost end position of the flip shaft 7. Through the arrangement of the shaft seat 6 and the flip shaft 7, driven by the linear telescopic action of the hydraulic cylinder 161 of the hydraulic drive device 16, the hinged joint 164, the annular plate 165 and the connecting plate 166 push the rotating shaft head 8 to rotate, thereby driving the rotation of the flip shaft 7, so that the valve plate 4 can be flipped to adjust the flip opening, and finally achieve the purpose of adjusting the air volume of the powder classifier.

[0026] like Figure 1 As shown in FIG. 3 , a fixing plate 9 is vertically fixed to the tilting shaft 7 to the right of the rotating shaft head 8. The fixing plate 9 is a plate with an arc shape at one end and a square shape at the other end. The fixing plate 9 not only provides space for the sensor mounting plate 123, proximity switch mounting plate 124, and proximity switch 125 of the limit mechanism 12, but also provides a mounting support for the secure attachment of the mounting plate 10.

[0027] like Figure 1 As shown in FIG3 , a proportional solenoid valve 11 is fixedly mounted on the upper portion of the mounting plate 10. The proportional solenoid valve 11 is used to provide precise high-pressure hydraulic oil to the hydraulic drive device 16. The provision of the proportional solenoid valve 11, under the automatic control of the PLC control module, enables precise control of the valve plate's turning accuracy.

[0028] like Figure 1 As shown in FIG. 3 , a limit mechanism 12 is fixedly disposed on the left side of the rotating shaft head 8 and is used to sense the flipping position of the valve plate 4. The limit mechanism 12 includes a follower limit plate 121, which is fish-shaped. The middle position of the follower limit plate 121 is fixed to the left front end of the rotating shaft head 8 near the bottom, and the front end of the follower limit plate 121 is fixed to the left front end of the hydraulic drive device 16 near the top. A limit post 122 is vertically fixed to the right side of the rear end of the follower limit plate 121. A sensing fixing plate 123 is fixed to the left side of the fixing plate 9 at the bottom of the mounting plate 10. A proximity switch mounting plate 124 is vertically fixed to the left side of the sensing fixing plate 123. A proximity switch 125 is longitudinally mounted at the center of the proximity switch mounting plate 124. The corresponding arrangement of the limit post 122 and the proximity switch 125 can sense the opening and closing position of the valve plate 4 and prevent the valve plate 4 from over-flipping.

[0029] like Figure 1As shown in FIG3 , the hydraulic drive device 16 is fixedly arranged at the bottom position of the proportional solenoid valve 11 and the rotating shaft head 8, and the hydraulic drive device 16 is used to provide a rotational driving force to the flip shaft 7; the hydraulic drive device 16 includes a hydraulic cylinder 161, the hydraulic cylinder 161 is longitudinally fixedly sleeved in the hydraulic cylinder fixing tube 14, the oil inlet end 162 is arranged at the upper rear end of the hydraulic cylinder 161, and the oil outlet end 163 is arranged at the upper front end of the hydraulic cylinder 161, and the oil inlet end 162 and the oil outlet end 163 are connected to the interior of the hydraulic cylinder 161; the hinged The head 164 is fixedly set at the right position of the front end of the fixed mounting plate 13, and the rear end of the hinge head 164 is fixedly connected to the telescopic rod of the hydraulic cylinder 161; the arc plate 165 is arranged symmetrically on the left and right, and the bottom of the symmetrically arranged arc plate 165 is installed on the front side of the hinge head 164, and is fixedly hinged by an axle pin passing through the arc plate and the hinge head 164 body; the rear end of the connecting plate 166 is fixedly connected to the front side of the rotating shaft head 8, and the front end of the connecting plate 166 is installed on the upper part of the symmetrically arranged arc plate 165, and is fixedly hinged by an axle pin.

[0030] The above-mentioned arrangement of the hydraulic cylinder 161, the hinged joint 164, the curved plate 165 and the connecting plate 166, on the one hand, can convert the linear telescopic action of the telescopic rod of the hydraulic cylinder 161 into the rotational action of the flipping shaft 7 and the rotating shaft head 8 through the hinged activity between the hinged joint 164, the curved plate 165 and the connecting plate 166, thereby realizing the flipping of the valve plate 4; on the other hand, it can overcome the flipping resistance of large pressure and air volume, and easily realize the flipping of the valve plate, thereby realizing the opening control of the valve plate, which plays a role in adjusting the air volume of the powder classifier.

[0031] like Figure 1-3As shown, the working process of the air volume regulating valve for the powder classifier is as follows: when the air volume of the powder classifier needs to be adjusted, the PLC control module of the powder classifier control system controls the opening of the proportional solenoid valve 11 according to the set driving amount, thereby quantitatively delivering high-pressure hydraulic oil to the hydraulic cylinder of the hydraulic drive device 16, and the hydraulic oil is delivered to the proportional solenoid valve body 111 through the oil delivery hole 112 of the proportional solenoid valve 11 by the hydraulic pump of the hydraulic station. After proportional distribution by the proportional solenoid valve body 111, the hydraulic oil is delivered from the oil inlet end 162 of the hydraulic cylinder 161 to the hydraulic cylinder 161 through the oil outlet hole 113, and the telescopic rod of the hydraulic cylinder 161 is pushed out under the high-pressure drive of the hydraulic oil (the hydraulic oil after work flows back to the oil tank of the hydraulic station through the oil outlet end 163), pushing the hinged joint 164 to move forward, and under the push of the intersection 164, the arc plate 165 and the connecting plate 166 move upward, so that the rotating shaft head 8 rotates, and under the rotation of the rotating shaft head 8, the rotating shaft 7 is driven The shaft seat 6 is used as a rotation support for the rotation action (at the same time, the follower limit plate 121 of the limit mechanism 12 is driven to rotate synchronously), and the rotation of the rotating shaft 7 drives the valve plate body 5 and the valve plate 4 to rotate, so that the valve plate 4 rotates in the valve cylinder 3, thereby realizing the adjustment of the air volume; when the follower limit plate 121 of the limit mechanism 12 of the rotating shaft head 8 rotates to the position of the proximity switch 125, the limit column 122 corresponds to the sensing head of the proximity switch 125. After the proximity switch 125 senses the position signal of the limit column 122 (at this time, the opening of the valve plate 4 is maximum), it sends a position signal to the PLC control module. After receiving the signal, the PLC control module simultaneously sends a closing control instruction to the proportional solenoid valve 11. The proportional solenoid valve 11 stops supplying the hydraulic cylinder of the hydraulic drive device 16 and stops working. At this time, the opening of the valve plate 4 is maximum, and the air volume of the corresponding powder classifier is maximum; the air volume is reduced by repeating the above-mentioned opposite action to reduce the rotation opening of the valve plate 4, thereby realizing the reduction of the air volume.

[0032] Various modifications to the above-described embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not limited to the embodiments shown herein, but is to be construed in the widest manner consistent with the principles and novel features disclosed herein.

Claims

1. An air volume regulating valve for a powder classifier, comprising a fixing frame, a flange, and a valve barrel, wherein the fixing frame is symmetrically fixed at the bottom of the valve barrel, and the flange is symmetrically fixed on the end surface of the valve barrel; the valve barrel is hollow cylindrical, the valve plate is a circular plate, and a valve plate fixing body is fixed to the rear side of the valve plate, characterized in that: The valve plate fixing body is a hollow circular shape, and the shaft seat is symmetrically arranged in the middle position of the left and right sides of the valve cylinder. The flip shaft passes through the center of the valve plate fixing body to install the valve plate and the valve plate fixing body in the radial middle position of the valve cylinder. The two ends of the flip shaft are installed on the shaft seats symmetrically arranged on the left and right. The left end of the flip shaft passes through the shaft seat and extends to the outside of the shaft seat. The rotating shaft head is fixed at the leftmost end position of the flip shaft; the fixed plate is vertically fixed on the flip shaft on the right side of the rotating shaft head, and the fixed plate is a plate with an arc shape at one end and a square shape at the other end; the mounting plate is fixed at 90° to the upper rear side of the fixing plate, and a proportional solenoid valve is fixed on the upper part of the mounting plate. The magnetic valve is used to provide precise high-pressure hydraulic oil to the hydraulic drive device; the limit mechanism is fixedly arranged at the left side position of the rotating shaft head, and the limit mechanism is used to sense the flipping position of the valve plate; the fixed mounting plate is fixedly arranged at the bottom position of the left rear end of the fixed plate, and the fixed mounting plate is used to install the hydraulic drive device; the left and right end faces of the hydraulic cylinder fixed cylinder are fixed with short shafts, the short shaft at the left end of the hydraulic cylinder fixed cylinder is fixed to the left side of the fixed mounting plate near the upper center, and the short shaft at the right end of the hydraulic cylinder fixed cylinder is fixed to the left side of the fixed plate; the hydraulic drive device is fixedly arranged at the bottom position of the proportional solenoid valve and the rotating shaft head, and the hydraulic drive device is used to provide rotational driving force to the flipping shaft.

2. The air volume regulating valve for a powder concentrator according to claim 1, characterized in that: The fixing frame is fixedly connected to one side of the mounting frame of the wind tube; the inner diameter of the flange is equal to the diameter of the wind tube, and the flange is butted against the fixed flange on the wind tube for fixedly mounting the regulating valve.

3. The air volume regulating valve for a powder concentrator according to claim 1, characterized in that: The diameter of the valve plate fixing body is smaller than the diameter of the valve plate, and the diameter of the valve plate is smaller than the diameter of the valve cylinder; the valve plate and the valve plate fixing body are turned over inside the valve cylinder by rotating the turning shaft.

4. The air volume regulating valve for a powder concentrator according to claim 1, characterized in that: The proportional solenoid valve includes a proportional solenoid valve body, and an oil supply hole and an oil outlet hole are opened in the centers of the front and rear end faces of the proportional solenoid valve body. The oil supply hole is set at the center of the rear end face of the proportional solenoid valve body, and the oil outlet hole is set at the center of the front end face of the proportional solenoid valve body. The oil supply hole and the oil outlet hole are connected to the interior of the proportional solenoid valve body.

5. The air volume regulating valve for a powder concentrator according to claim 1, characterized in that: The limiting mechanism includes a follow-up limiting plate, which is fish-shaped. The middle position of the follow-up limiting plate is fixed to the left front end of the rotating shaft head near the bottom, and the front end of the follow-up limiting plate is fixed to the left front end of the hydraulic drive device near the upper position; the limiting column is vertically fixed to the right position of the rear end of the follow-up limiting plate, and the sensing fixing plate is fixedly arranged on the left side of the fixing plate at the bottom of the mounting plate. The left side of the sensing fixing plate is vertically fixed with a proximity switch mounting plate, and the proximity switch is longitudinally installed at the center position of the proximity switch mounting plate.

6. The air volume regulating valve for a powder concentrator according to claim 1, characterized in that: The fixed mounting plate is L-shaped, and the short axes fixedly arranged on the left and right end surfaces of the hydraulic cylinder fixing tube are arranged symmetrically.

7. The air volume regulating valve for a powder concentrator according to claim 1, characterized in that: The hydraulic drive device includes a hydraulic cylinder, which is longitudinally fixed and sleeved in the hydraulic cylinder fixing tube, the oil inlet end is arranged at the upper rear end part of the hydraulic cylinder, and the oil outlet end is arranged at the upper front end part of the hydraulic cylinder, and the oil inlet end and the oil outlet end are connected with the interior of the hydraulic cylinder; the hinge head is fixedly arranged at the right front end position of the fixed mounting plate, and the rear end of the hinge head is fixedly connected to the telescopic rod of the hydraulic cylinder; the arc plate is arranged symmetrically on the left and right, and the bottom of the arc plate arranged symmetrically on the left and right is installed on the front side of the hinge head, and is fixedly hinged through the arc plate and the hinge head body by an axle pin; the rear end of the connecting plate is fixedly connected to the front side surface of the rotating shaft head, and the front end of the connecting plate is installed on the upper part of the arc plate arranged symmetrically on the left and right, and is fixedly hinged by an axle pin.

8. The air volume regulating valve for a powder concentrator according to claim 4, characterized in that: The oil delivery hole is fixedly connected to the oil pump output end of the hydraulic station through a high-pressure oil pipe, the oil outlet hole is fixedly connected to the oil inlet end of the hydraulic cylinder through a high-pressure oil pipe, and the oil outlet end is fixedly connected to the oil tank of the hydraulic station through a high-pressure oil pipe.

9. The air volume regulating valve for a powder concentrator according to claim 5, characterized in that: The front end of the follow-up limiting plate is fixed to the upper left side of the arc-shaped plate that is symmetrically arranged on the left and right; the induction head of the proximity switch corresponds to the limiting column.

10. The air volume regulating valve for a powder concentrator according to claim 9, characterized in that: The proximity switch is fixedly connected to the PLC control module of the powder classifier control system through a signal line, and the proportional solenoid valve body is fixedly connected to the PLC control module of the powder classifier control system through a signal line.

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