Spraying powder recycling device for coating line

Abstract

The invention provides a coating line sprayed powder recycling device, and relates to the technical field of sprayed powder recycling, the coating line sprayed powder recycling device comprises a cyclone separator, the cyclone separator is provided with a recycling mechanism for recycling coating sprayed powder, the cyclone separator is provided with an adjusting mechanism facilitating separation of recycled sprayed powder, and the recycling mechanism comprises a flow meter; the adjusting mechanism comprises an air inlet throat pipe, a C-shaped mounting block, a motor and a bearing plate, and a connecting pipe is fixedly mounted at the side end part of the air inlet throat pipe. According to the device, the flowmeter, the air inlet throat pipe and the movable ball are matched, so that the flow is detected in real time through the flowmeter, the movable ball in the air inlet throat pipe is driven to move in a matched mode, the flow speed of dust gas is dynamically adjusted, the valve or the sectional area does not need to be manually adjusted, and the risk of misoperation is reduced; and meanwhile, the delay and hysteresis of manual regulation and control are avoided, the self-adaptive regulation of the flow velocity is ensured, and the energy-saving efficiency of the equipment is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of spray powder recovery, and more specifically, particularly relates to a spray powder recovery and reuse device for a coating line. Background Art

[0002] The cyclone collector is an important device for recovering powder coatings in the powder spraying process of the coating line. It uses the principle of centrifugal force to make the powder-containing airflow rotate in the cyclone, thereby separating the powder coating from the airflow. It usually consists of a cyclone, an air inlet, an air outlet, a powder collecting hopper, etc. The powder-containing airflow enters the cyclone tangentially from the air inlet and rotates at high speed in the cyclone. The powder particles are thrown to the wall of the cyclone under the action of centrifugal force and fall along the wall to the powder collecting hopper, while the purified airflow is discharged from the air outlet.

[0003] The Chinese patent publication number is: CN117123377A, a cyclone separation and recovery device for fertilizer production, the invention is provided with a feed opening on the side of the separation tube adjacent to the guide protrusion, the interior of the separation tube is provided with an electrostatic filter, and the side of the electrostatic filter adjacent to the axis of the separation tube is provided with a plurality of absorption blocks. The fertilizer particles are guided by the guide protrusion and enter the interior of the separation component, while the lighter dust enters the guide channel, so as to achieve efficient separation of the fertilizer particles and the dust and reduce the cost loss.

[0004] Existing powder recycling equipment has the following disadvantages:

[0005] 1. It is difficult for the existing cyclone collector to dynamically adjust the flow rate of dust gas in real time according to the flow rate of dust gas. The cross-sectional area of ​​the air inlet channel is fixed. When the gas flow rate is lower than the design value, the flow rate decreases, resulting in insufficient centrifugal force. When the flow rate is too high, the turbulence intensifies and causes back mixing. The settled particles are entrained for the second time, which affects the efficiency and quality of recovery and separation.

[0006] 2. In the air inlet of the existing cyclone collector, due to the influence of static electricity, pipe wall material, etc., dust will adhere to the inner wall of the pipe, which will destroy the symmetry of the rotating airflow, reduce the centrifugal separation effect, and require frequent shutdowns. It cannot be handled in time during the separation process and requires subsequent manual intervention, which consumes manpower.

[0007] In view of this, the existing structure and defects are studied and improved, and a coating line powder recovery and reuse device is provided, in order to achieve a more practical purpose. Summary of the invention

[0008] In order to solve the above technical problems, the present invention provides a coating line powder recovery and reuse device to solve the above problems.

[0009] A powder spraying recovery and reuse device for a painting line, comprising a cyclone separator, a recovery mechanism for recovering the painting powder is arranged on the cyclone separator, an adjusting mechanism for facilitating the separation of the recovered powder is arranged on the cyclone separator, the recovery mechanism includes a flow meter; the adjusting mechanism includes an air inlet throat, a C-shaped mounting block, a motor and a supporting plate, a connecting pipe is fixedly installed at the side end of the air inlet throat, the connecting pipe is fixedly installed through the circumferential end of the cyclone separator, the C-shaped mounting block is located at the upper end of the air inlet throat, a relay is fixedly installed at the side end of the C-shaped mounting block, the motor is fixedly installed at the side end of the relay, the supporting plate is located at the lower end of the air inlet throat, the flow meter is fixedly installed at the side end of the air inlet throat, a recovery vertical frame is fixedly installed at the circumferential end of the cyclone separator, a first cross bar and a second cross bar are also fixedly installed at the circumferential end of the cyclone separator, the C-shaped mounting block is fixedly installed at the side end of the second cross bar, the supporting plate is fixedly installed at the upper end of the first cross bar, a movable ball is arranged on the inner side wall of the air inlet throat, an anti-sticking coating is coated on the circumferential end of the movable ball, an adjusting rod is fixedly installed at the circumferential end of the movable ball, an L-shaped vertical rod is fixedly installed at the upper end of the adjusting rod, a push plate is fixedly installed at the side end of the L-shaped vertical rod, a threaded groove is formed through the side end of the push plate, an installation circular groove and an installation square groove are formed through the side end of the C-shaped mounting block, a threaded rod is fixedly installed at the output end of the motor, the threaded rod is rotatably installed through the inner side wall of the installation circular groove, an ultrasonic generator is fixedly installed at the upper end of the supporting plate, two conduction rings are fixedly installed at the upper end of the ultrasonic generator, the two conduction rings are respectively fixedly installed at the circumferential end of the air inlet throat, a connecting wire is fixedly installed at the side end of the flow meter, and the other end of the connecting wire is fixedly installed at the side end of the relay.

[0010] Preferably, a material guiding pipe is fixedly installed at the other end of the flow meter.

[0011] Preferably, the L-shaped vertical rod is slidably installed on the inner side wall of the installation circular groove, and the threaded rod is threadedly rotatably installed on the inner side wall of the threaded groove.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In the present invention, a processing structure for separating dust gas adapted to low flow is provided. When the flow in the flow meter is low, the position of the movable ball in the air inlet throat can be changed, so that the cross-sectional area that can pass through the air inlet throat becomes smaller, thereby accelerating the flow velocity of the dust gas flowing through the air inlet throat, enhancing the centrifugal sedimentation effect of the dust gas particles, compensating for the insufficient flow velocity of the dust gas, and maintaining the separation efficiency of the dust gas.

[0014] In the present invention, by providing a treatment structure adapted to separate high-flow dust gas, when the flow rate in the flowmeter is high, the position of the movable ball in the air inlet throat can be changed, so that the cross-sectional area that can pass through in the air inlet throat becomes larger, avoiding the formation of strong turbulence in the cyclone separator, resulting in the secondary entrainment and discharge of the settled particles, and at the same time avoiding the accumulation and blockage of dust in narrow areas, ensuring that the dust gas passes through more stably and ensuring the separation efficiency.

[0015] In the present invention, by providing a flowmeter, an air inlet throat and a movable ball in cooperation, it is realized to detect the flow rate in real time through the flowmeter, drive the movable ball in the air inlet throat to move in cooperation, and realize the dynamic adjustment of the flow rate of the dust gas, without manually adjusting the valve or cross-sectional area, reducing the risk of operation errors, and at the same time avoiding the delay and hysteresis of manual control, ensuring the adaptive adjustment of the flow rate, ensuring the energy-saving efficiency of the equipment, reducing equipment wear and ensuring the separation effect after the dust gas is recovered.

[0016] In the present invention, by coating an anti-adhesion coating on the circumferential end of the air inlet throat, the anti-adhesion coating is a tungsten carbide-polytetrafluoroethylene coating, and the Mohs hardness of tungsten carbide is as high as 8.5 to 9.5, which can ensure the anti-wear ability of the surface of the small ball, reduce the wear rate of the anti-adhesion coating and reduce dust adhesion, avoiding the possibility that the dust gas may adhere to the surface of the movable ball, resulting in the separation of the gas. The surface tension of the polytetrafluoroethylene coating is extremely low, and the friction coefficient is only 0.04, which can effectively prevent dust and sticky materials from accumulating on the surface of the small ball and reduce the risk of jamming.

[0017] In the present invention, by providing a support plate, an ultrasonic generator and a conduction ring in cooperation, when the dust gas is transmitted on the inner wall of the air inlet throat, through the cavitation effect generated by driving the conduction ring to vibrate by the ultrasonic generator, the adhesion force between the dust and the pipe wall can be destroyed, so that the air inlet throat is kept clean, effectively avoiding the phenomenon that dust adheres to the inner wall of the air inlet throat, and improving the adaptability and reliability of the cyclone separator in the working condition when feeding dust gas. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the cyclone separator of the present invention;

[0019] Figure 2 is a schematic structural diagram of the air inlet throat of the present invention;

[0020] Figure 3 is a schematic structural diagram of the flowmeter of the present invention;

[0021] Figure 4 is a schematic structural diagram of the ultrasonic generator of the present invention;

[0022] Figure 5 is a schematic structural diagram of the C-shaped mounting block of the present invention;

[0023] Figure 6 It is a schematic structural view of the L-shaped vertical rod of the present invention;

[0024] Figure 7 It is a schematic structural view of the motor of the present invention;

[0025] Figure 8 It is a schematic cross-sectional structural view of the air inlet throat pipe of the present invention.

[0026] In the figure, the corresponding relationship between the component names and the attached drawing numbers is as follows: 1, cyclone separator; 11, recovery support frame; 12, first cross bar; 13, second cross bar; 2, air inlet throat pipe; 21, connecting pipe; 22, movable ball; 23, adjusting rod; 24, L-shaped vertical rod; 25, push plate; 26, threaded groove; 27, anti-adhesion coating; 3, C-shaped mounting block; 31, mounting round groove; 32, mounting square groove; 33, relay; 4, motor; 41, threaded rod; 5, supporting plate; 51, ultrasonic generator; 52, conduction ring; 6, flow meter; 61, connecting wire; 62, material guiding pipe. Specific embodiments

[0027] The following further describes in detail the embodiments of the present invention in conjunction with the attached drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0028] Please refer to Figures 1 - 8 , the present invention provides a powder spraying recovery and reuse device for a coating line, including a cyclone separator 1. A recovery mechanism for recovering the coating powder spraying is provided on the cyclone separator 1. An adjustment mechanism for facilitating the separation of the recovered powder spraying is provided on the cyclone separator 1. In the production line of the coating powder spraying, after the powder generated by the coating is recovered, the dust-containing gas or powder particles enter the cyclone separator 1 through the tangential inlet, and a high-speed rotating airflow is formed inside the cyclone separator 1. Due to the relatively large density of the particles, they are thrown towards the wall of the device under the action of centrifugal force and slide down along the wall of the cyclone separator 1 to the dust collection chamber, and the purified gas is discharged from the central exhaust pipe, thereby realizing the separation treatment and utilization of the recovered coating powder;

[0029] The recycling mechanism includes a flow meter 6; the adjustment mechanism includes an air inlet throat 2, a C-shaped mounting block 3, a motor 4 and a support plate 5. A connecting pipe 21 is fixedly installed at the side end of the air inlet throat 2, and the connecting pipe 21 penetrates and is fixedly installed at the circumferential end of the cyclone separator 1. The C-shaped mounting block 3 is located at the upper end of the air inlet throat 2. A relay 33 is fixedly installed at the side end of the C-shaped mounting block 3. The motor 4 is fixedly installed at the side end of the relay 33. The support plate 5 is located at the lower end of the air inlet throat 2. The flow meter 6 is fixedly installed at the side end of the air inlet throat 2. A recycling support 11 is fixedly installed at the circumferential end of the cyclone separator 1. A first cross bar 12 and a second cross bar 13 are also fixedly installed at the circumferential end of the cyclone separator 1. The C-shaped mounting block 3 is fixedly installed at the side end of the second cross bar 13. The support plate 5 is fixedly installed at the upper end of the first cross bar 12. An activity ball 22 is provided on the inner side wall of the air inlet throat 2. The circumferential end of the activity ball 22 is coated with an anti-adhesion coating 27. A regulating rod 23 is fixedly installed at the circumferential end of the activity ball 22. An L-shaped vertical rod 24 is fixedly installed at the upper end of the regulating rod 23. A push plate 25 is fixedly installed at the side end of the L-shaped vertical rod 24. A threaded groove 26 is provided through the side end of the push plate 25. When the flow rate through the material guide pipe 62 is small, at this time the flow meter 6 will transmit a threshold signal to the relay 33 through the connecting wire 61. The relay 33 will start the motor 4 to drive the threaded rod 41 to rotate forward. The forward rotation of the threaded rod 41 will drive the push plate 25 to move towards the direction close to the relay 33 through the threaded groove 26. The movement of the push plate 25 will drive the regulating rod 23 to move through the L-shaped vertical rod 24. The movement of the regulating rod 23 will drive the activity ball 22 to move in the air inlet throat 2. At this time, the cross-sectional area that can pass through in the air inlet throat 2 becomes smaller. When the dust gas flows through the air inlet throat 2, at this time the flow rate of the dust gas will increase, so that it enters the cyclone separator 1 through the connecting pipe 21 to form a high-speed rotating air flow, avoiding the poor separation effect in the cyclone separator 1 due to its too slow flow rate;

[0030] An installation round groove 31 and an installation square groove 32 are provided through the side end of the C-shaped mounting block 3. A threaded rod 41 is fixedly installed at the output end of the motor 4. The threaded rod 41 penetrates and is rotatably installed on the inner side wall of the installation round groove 31. An ultrasonic generator 51 is fixedly installed at the upper end of the support plate 5. Two conduction rings 52 are fixedly installed at the upper end of the ultrasonic generator 51. The two conduction rings 52 are respectively fixedly installed at the circumferential end of the air inlet throat 2. A support plate 5 is provided below the air inlet throat 2. When the dust gas passes through the inside of the air inlet throat 2, the ultrasonic generator 51 on the support plate 5 can be started to drive the two conduction rings 52 to vibrate, so as to realize that the dust particles attached to the inner wall of the air inlet throat 2 fall off due to vibration, avoiding the particles from adhering to the inner side wall of the air inlet throat 2;

[0031] A connecting wire 61 is fixedly installed at the side end of the flowmeter 6, and the other end of the connecting wire 61 is fixedly installed at the side end of the relay 33. A material guiding pipe 62 is fixedly installed at the other side end of the flowmeter 6. When collecting the dust gas from spraying, the dust gas will enter the ultrasonic generator 51 through the recovery pipeline. According to the different amounts of dust gas, the flow rate entering the material guiding pipe 62 is also different. A flowmeter 6 is provided on the material guiding pipe 62. The flowmeter 6 can detect the flow rate of the dust gas flowing through the flowmeter 6. According to the different flow rates flowing through the connecting wire 61, the cross-section of the rear air inlet throat pipe 2 can be adjusted;

[0032] The L-shaped vertical rod 24 is slidably installed on the inner wall of the installation circular groove 31, and the threaded rod 41 is rotationally installed on the inner wall of the threaded groove 26. When the flow rate through the material guiding pipe 62 is relatively large, at this time, the flowmeter 6 will transmit the threshold signal to the relay 33 through the connecting wire 61, and the relay 33 will start the motor 4 to drive the threaded rod 41 to rotate in the reverse direction, so that the movable ball 22 moves in the opposite direction in the air inlet throat pipe 2, making the cross-section of the air inlet throat pipe 2 through which the gas can pass larger, thereby maintaining the flow rate of the dust gas and ensuring its separation effect.

[0033] Working principle:

[0034] First step, on the production line of painting and powder spraying, after recovering the powder generated by painting, the dust-containing gas or powder particles enter the cyclone separator 1 through the tangential inlet, form a high-speed rotating airflow in the cyclone separator 1. Due to the relatively large density of the particles, they are thrown towards the wall of the separator under the action of centrifugal force and slide down along the wall of the cyclone separator 1 to the dust collection chamber, and the purified gas is discharged from the central exhaust pipe, so as to realize the separation treatment and utilization of the recovered painting powder;

[0035] Second step, when collecting the dust gas from spraying, the dust gas will enter the ultrasonic generator 51 through the recovery pipeline. According to the different amounts of dust gas, the flow rate entering the material guiding pipe 62 is also different. A flowmeter 6 is provided on the material guiding pipe 62. The flowmeter 6 can detect the flow rate of the dust gas flowing through the flowmeter 6. According to the different flow rates flowing through the connecting wire 61, the cross-section of the rear air inlet throat pipe 2 can be adjusted;

[0036] Step 3: When the flow rate through the material guiding pipe 62 is low, the flowmeter 6 will transmit a threshold signal to the relay 33 through the connecting wire 61. The relay 33 will start the motor 4 to drive the threaded rod 41 to rotate forward. The forward rotation of the threaded rod 41 will drive the push plate 25 to move towards the relay 33 through the thread groove 26. The movement of the push plate 25 will drive the adjusting rod 23 to move through the L-shaped vertical rod 24. The movement of the adjusting rod 23 will drive the movable ball 22 to move in the air inlet throat pipe 2. At this time, the cross-sectional area that can pass through in the air inlet throat pipe 2 becomes smaller. When the dust gas flows through the air inlet throat pipe 2, the flow rate of the dust gas will increase, so that it enters the cyclone separator 1 through the connecting pipe 21 to form a high-speed rotating airflow, avoiding poor separation effect in the cyclone separator 1 due to too slow flow rate;

[0037] This device is provided with a processing structure for separating dust gas with low flow rate. When the flow rate in the flowmeter 6 is low, the position of the movable ball 22 in the air inlet throat pipe 2 can be changed, so that the cross-sectional area that can pass through in the air inlet throat pipe 2 becomes smaller, thereby increasing the flow rate of the dust gas flowing through the air inlet throat pipe 2, enhancing the centrifugal sedimentation effect of the dust gas particles, compensating for the insufficient flow rate of the dust gas, and maintaining the separation efficiency of the dust gas;

[0038] Step 4: When the flow rate through the material guiding pipe 62 is high, the flowmeter 6 will transmit a threshold signal to the relay 33 through the connecting wire 61. The relay 33 will start the motor 4 to drive the threaded rod 41 to rotate reversely, and then the movable ball 22 will move in the opposite direction in the air inlet throat pipe 2, making the cross-sectional area of the air inlet throat pipe 2 for passing gas larger, so as to maintain the flow rate of the dust gas and ensure its separation effect;

[0039] This device is provided with a processing structure for separating dust gas with high flow rate. When the flow rate in the flowmeter 6 is high, the position of the movable ball 22 in the air inlet throat pipe 2 can be changed, so that the cross-sectional area that can pass through in the air inlet throat pipe 2 becomes larger, avoiding the formation of strong turbulence in the cyclone separator 1, resulting in the secondary entrainment and discharge of the settled particles, and at the same time avoiding the situation of dust accumulation and blockage in narrow areas, ensuring that the dust gas passes through more stably and ensuring the separation efficiency;

[0040] This device is provided with the cooperation of the flowmeter 6, the air inlet throat pipe 2 and the movable ball 22, realizing real-time detection of the flow rate through the flowmeter 6 and driving the movable ball 22 in the air inlet throat pipe 2 to move in cooperation, achieving dynamic adjustment of the flow rate of the dust gas, without the need for manual adjustment of valves or cross-sectional areas, reducing the risk of operation errors, and at the same time avoiding the delay and hysteresis of manual control, ensuring the adaptive adjustment of the flow rate, ensuring the energy-saving efficiency of the equipment, reducing equipment wear and ensuring the separation effect after the dust gas is recovered;

[0041] An anti-sticking coating 27 is applied to the circumferential end of the air inlet throat pipe 2 of this device. The anti-sticking coating 27 is a tungsten carbide-polytetrafluoroethylene coating. The Mohs hardness of tungsten carbide is as high as 8.5 to 9.5, which can ensure the anti-wear ability of the surface of the small ball. It can reduce the wear rate of the anti-sticking coating 27 and reduce dust adhesion, avoiding the possible adhesion of dust gas on the surface of the moving ball 22, resulting in separated gas. The surface tension of the polytetrafluoroethylene coating is extremely low, and the friction coefficient is only 0.04, which can effectively prevent the accumulation of dust and sticky materials on the surface of the small ball and reduce the risk of jamming;

[0042] In the fifth step, a supporting plate 5 is arranged below the air inlet throat pipe 2. When the dust gas passes through the inside of the air inlet throat pipe 2, the ultrasonic generator 51 on the supporting plate 5 can be started to drive the two conduction rings 52 to vibrate, so as to realize the falling off of the dust particles attached to the inner wall of the air inlet throat pipe 2 due to vibration, avoiding the adhesion of particles on the inner side wall of the air inlet throat pipe 2;

[0043] By setting the supporting plate 5, the ultrasonic generator 51 and the conduction ring 52 to cooperate with each other, when the dust gas is transmitted on the inner wall of the air inlet throat pipe 2, through the cavitation effect generated by the ultrasonic generator 51 driving the conduction ring 52 to vibrate, the adhesion force between the dust and the pipe wall can be destroyed, so that the air inlet throat pipe 2 can be kept clean, effectively avoiding the phenomenon of dust adhering to the inner wall of the air inlet throat pipe 2, and improving the adaptability and reliability of the cyclone separator 1 in the working condition during the feeding of dust gas.

[0044] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A powder spraying recovery and reuse device for a painting line, comprising a cyclone separator (1), characterized in that: A recovery mechanism for recovering the coating powder is provided on the cyclone separator (1), and an adjustment mechanism for facilitating the separation of the recovered powder is provided on the cyclone separator (1); Among them, the recovery mechanism includes a flowmeter (6); the adjustment mechanism includes an air inlet throat pipe (2), a C-shaped mounting block (3), a motor (4) and a supporting plate (5). A connecting pipe (21) is fixedly installed at the side end of the air inlet throat pipe (2), and the connecting pipe (21) is fixedly installed through the circumferential end of the cyclone separator (1). The C-shaped mounting block (3) is located at the upper end of the air inlet throat pipe (2). A relay (33) is fixedly installed at the side end of the C-shaped mounting block (3). The motor (4) is fixedly installed at the side end of the relay (33). The supporting plate (5) is located at the lower end of the air inlet throat pipe (2). The flowmeter (6) is fixedly installed at the side end of the air inlet throat pipe (2).

2. The powder spraying recovery and reuse device for a painting line according to claim 1, characterized in that, A recovery vertical frame (11) is fixedly installed at the circumferential end of the cyclone separator (1), and a first cross bar (12) and a second cross bar (13) are also fixedly installed at the circumferential end of the cyclone separator (1); Among them, the C-shaped mounting block (3) is fixedly installed at the side end of the second cross bar (13), and the supporting plate (5) is fixedly installed at the upper end of the first cross bar (12).

3. The powder spraying recovery and reuse device for a painting line according to claim 2, wherein A movable ball (22) is provided on the inner side wall of the air inlet throat pipe (2). An anti-sticking coating (27) is coated on the circumferential end of the movable ball (22), and an adjusting rod (23) is fixedly installed at the circumferential end of the movable ball (22).

4. The powder spraying recovery and reuse device for a painting line according to claim 3, wherein An L-shaped vertical rod (24) is fixedly installed at the upper end of the adjusting rod (23). A push plate (25) is fixedly installed at the side end of the L-shaped vertical rod (24). A threaded groove (26) is formed through the side end of the push plate (25).

5. The powder spraying recovery and reuse device for a painting line according to claim 4, characterized in that, An installation circular groove (31) and an installation square groove (32) are formed through the side end of the C-shaped mounting block (3). A threaded rod (41) is fixedly installed at the output end of the motor (4), and the threaded rod (41) is rotatably installed through the inner side wall of the installation circular groove (31).

6. The powder spraying recovery and reuse device for a painting line according to claim 5, characterized in that, An ultrasonic generator (51) is fixedly installed at the upper end of the supporting plate (5), and two conduction rings (52) are fixedly installed at the upper end of the ultrasonic generator (51).

7. The powder spraying recovery and reuse device for a painting line according to claim 6, characterized in that, The two conduction rings (52) are respectively fixedly installed at the circumferential end of the air inlet throat pipe (2).

8. The powder spraying recovery and reuse device for a painting line according to claim 7, wherein A connecting wire (61) is fixedly installed at the side end of the flowmeter (6), and the other end of the connecting wire (61) is fixedly installed at the side end of the relay (33).

9. The powder spraying recovery and reuse device for a painting line according to claim 8, wherein, A guide pipe (62) is fixedly installed at the other end of the flowmeter (6).

10. The powder spraying recovery and reuse device for a painting line according to claim 9, wherein The L-shaped vertical rod (24) is slidably installed on the inner side wall of the installation circular groove (31), and the threaded rod (41) is threadedly rotatably installed on the inner side wall of the threaded groove (26).

Images