Online powder adding system for carrier gas type powder feeder and control method

Abstract

The invention provides an online powder adding system for a carrier gas type powder feeder and a control method.The system comprises a powder storage bin, a communicating valve, a powder adding bin, a switching valve component, a powder feeder powder bin, a communicating pipeline component and a stirring component, and the powder storage bin communicates with the powder adding bin through the communicating valve; the powder adding bin and the powder feeder bin are communicated through the switching valve component to form a powder adding channel, the powder adding bin and the powder feeder bin are communicated through the communicating pipeline component to form an isobaric channel, and the stirring component penetrates through the powder adding bin, the switching valve component and the powder feeder bin to stir powder in the powder adding bin and the powder feeder bin. The powder feeder adopting the structure can realize a non-stop powder adding function in a high-stability state. According to the control method, the gas pressure in the powder feeding system can be monitored and adjusted in real time, so that the high-continuity and high-stability powder feeding effect is achieved, and the problems of ultra-long-time powder feeding and uninterrupted powder supply are solved.

Description

Technical Field

[0001] The invention relates to the field of air-carrying powder conveying, and in particular to an air-carrying powder feeder capable of adding powder online and a control method thereof. Background Art

[0002] With the development and application of technologies such as spraying and laser cladding, the application of gas-carrying powder delivery technology has also been increasingly improved. In the process of spraying and cladding, the material powder needs to be delivered to the working part, so the accurate, stable and continuous delivery of powder directly affects the quality and continuity of the coating, cladding layer, etc.

[0003] With the application of this technology on more and more large workpieces, the problem of adding powder to the air-carrying powder feeder without stopping the machine and affecting the stability of the entire powder delivery system needs to be solved urgently. However, the existing air-carrying powder feeder with online powder adding function cannot ensure the complete consistency of the state of the powder-carrying gas during the powder adding process. During the powder adding operation, the powder state of the working part will fluctuate, resulting in defects in the coating and cladding layer of this part, affecting the quality of the entire large workpiece spraying and cladding.

[0004] At the same time, some carrier gas powder feeders use an online powder adding method with multiple powder barrels. In addition to the above-mentioned defects, there are also problems such as large size and inconvenient operation, multiple powder barrels do not have stirring function, small powder adding channels, easy to be blocked, and a large amount of powder residual in the powder barrel after adding powder. Summary of the invention

[0005] The present invention provides a carrier gas powder feeder capable of online powder addition and a control method thereof to solve the above problems. The device has a simple structure, convenient operation, a large powder adding channel cross-section, a small amount of residual powder, a stable carrier gas state, and can accurately, stably and continuously deliver powder for a long time.

[0006] In order to solve the above problems, the present invention discloses an online powder adding system for a carrier gas powder feeder, comprising a powder adding bin and a powder feeder powder bin, wherein the lower part of the powder adding bin and the upper part of the powder feeder powder bin are connected through the switching valve component to form a powder feeding channel, and the powder is transported to the powder feeding tray component, and then the powder feeding tray component is transported to the working area through the powder feeding pipeline;

[0007] The upper part of the powder adding bin is provided with a powder adding port;

[0008] An air charging valve is provided on the upper part of the powder adding bin;

[0009] The inflation valve is controlled by a second solenoid valve;

[0010] The switching valve component is composed of an upper valve plate, a valve plate and a lower valve plate which are sealed and connected;

[0011] The switching valve component is controlled by a fourth solenoid valve;

[0012] The upper side of the powder adding bin and the upper side of the powder bin of the powder feeder are connected through a connecting pipe component;

[0013] The communication pipe component is composed of an upper communication pipe, a communication valve and a lower communication pipe;

[0014] The communication valve is controlled by a third solenoid valve;

[0015] The upper connecting pipe is provided with an exhaust valve and a first pressure gauge;

[0016] The lower communicating pipe is provided with a second pressure gauge;

[0017] The middle of the powder adding bin, the switching valve component and the powder feeder bin is penetrated from top to bottom by a stirring component to continuously stir the powder in the powder adding bin and the powder feeder bin;

[0018] The switching valve component is provided with a first powder channel hole, a second powder channel hole and a third powder channel hole from top to bottom, and the connection and disconnection of the powder channel are realized by changing the position of the second powder channel hole; the middle part of the switching valve component is provided with a first through channel hole, a second through channel hole and a third through channel hole from top to bottom to realize the penetration of the stirring component from top to bottom; the above components are sealed and connected.

[0019] Furthermore, the upper valve plate of the switching valve component is provided with a plurality of first powder channel holes, and a first sealing ring is provided around the first powder channel holes to ensure the sealed isolation between the powder conveying channel and the space inside the valve; a second sealing ring is provided around the edge of the upper valve plate to ensure the sealed isolation between the space inside the valve and the external space; a first through channel hole is provided at the center of the upper valve plate, and a third sealing ring is installed in the first through channel hole to ensure the passage and sealing of the lower stirring rod of the stirring component.

[0020] Furthermore, the valve plate of the switching valve component is provided with a plurality of second powder channel holes; a second through channel hole is provided in the center of the valve plate, which is an oblong hole, to ensure that the stirring component penetrating from top to bottom can realize the switching action of connecting and disconnecting the powder channel through the valve plate.

[0021] Furthermore, the lower valve plate of the switching valve component is provided with a plurality of third powder channel holes, and a fourth sealing ring is provided around the third powder channel holes to ensure the sealed isolation between the powder conveying channel and the space inside the valve; a fifth sealing ring is provided around the edge of the lower valve plate to ensure the sealed isolation between the space inside the valve and the external space; a third through channel hole is provided at the center of the lower valve plate, and a sixth sealing ring is installed in the third through channel hole to ensure the passage and sealing of the lower stirring rod of the stirring component.

[0022] The communicating pipeline component can realize the communication and isolation of the powder adding bin and the powder bin space of the powder feeder by switching the communicating valve.

[0023] The first pressure gauge can display the pressure of the powder-carrying gas inside the powder adding bin and the upper communicating pipe in real time.

[0024] The second pressure gauge can display the pressure of the powder-carrying gas inside the powder bin of the powder feeder and the lower communicating pipe in real time.

[0025] The exhaust valve can adjust the pressure of the powder-carrying gas inside the powder adding bin and the upper communicating pipe by opening and closing.

[0026] The stirring component is provided with an upper stirring rod and a stirring rod protective cover in the powder adding bin; the stirring component is provided with a lower stirring rod in the powder bin of the powder feeder, and the lower stirring rod is coaxially and tightly connected with the upper stirring rod.

[0027] The control method comprises the following steps: step 1, the system control unit receives a powder adding signal, and makes the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the exhaust valve in a closed state; step 2, opening the exhaust valve to discharge the gas in the powder adding bin, so that the powder adding bin and the powder storage bin are both in an atmospheric pressure state; step 3, after the pressure monitoring unit detects that the value of the first pressure gauge reaches the requirement, the first solenoid valve is opened to allow the powder to enter the powder adding bin from the powder storage bin; step 4, after the amount of powder in the powder adding bin reaches the set value, the system control unit closes the first solenoid valve, controls the second solenoid valve and the exhaust valve to increase the pressure in the powder adding bin; step 5, the first pressure gauge and the second pressure gauge are compared in real time, and after the pressure reaches the set equal value interval, the third solenoid valve is opened to make the powder adding bin and the powder feeder powder bin isobarically connected; step 6, the system control unit opens the fourth solenoid valve to allow the powder to enter the powder feeder powder bin from the powder adding bin, completing the non-stop online powder adding process.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] The present invention monitors the powder-carrying gas pressure inside the powder adding bin and the powder feeder powder bin in real time through the first pressure gauge and the second pressure gauge, and performs powder adding control according to the displayed values ​​of the first pressure gauge and the second pressure gauge, so that the working environment of the conveying part of the entire powder feeding system can have high consistency and high stability, so that the working part can obtain long-term, accurate, stable and continuous powder supply, ensuring high quality, high stability and continuity of the operation.

[0030] When the switching valve of the present invention is in the connecting position, the structure of the multi-way powder channel can make the powder added in the powder adding bin quickly enter the powder bin of the powder feeder. At the same time, the compact structure can greatly reduce the impact of the inflowing powder on the original powder inside the powder bin of the powder feeder, and greatly reduce the impact on the state of the powder feeding system during operation.

[0031] The present invention can provide a stirring function normally in both the online powder adding and powder feeding operation state and the non-powder adding and powder feeding operation state, and can avoid the situation that the powder added in the powder adding bin is blocked when passing through the switching valve; the powder in the powder adding bin can fully flow into the powder feeder powder bin, and the residual powder in the powder adding bin is greatly reduced; at the same time, a stirring effect with a consistent state is provided for the powder in the powder feeder powder bin, and the powder feeding state is not inconsistent due to the state change of the powder in the powder feeder powder bin caused by the cessation of stirring during the powder adding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of a control method for an online powder adding system of a carrier gas powder feeder according to an embodiment of the present invention;

[0033] Figure 2 It is a structural schematic diagram of an online powder adding system for a carrier gas type powder feeder according to an embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of the overall cross-sectional structure of an online powder adding system for a carrier gas type powder feeder according to an embodiment of the present invention;

[0035] Figure 4 is a schematic diagram of the detailed cross-sectional structure of a switching valve component according to an embodiment of the present invention;

[0036] Figure 5 2 is a schematic diagram of the structure of the upper valve plate according to an embodiment of the present invention;

[0037] Figure 6 is a schematic diagram of the valve plate structure of an embodiment of the present invention;

[0038] Figure 7 is a schematic diagram of the structure of the lower valve plate of an embodiment of the present invention;

[0039] Description of reference numerals:

[0040] 1-powder adding bin, 2-switching valve component, 3-powder feeder powder bin, 4-powder feeding plate component, 5-connecting pipeline component, 6-stirring component, 7-powder adding port, 8-inflating valve, 9-upper valve plate, 10-valve plate, 11-lower valve plate, 12-upper connecting pipeline, 13-connecting valve, 14-lower connecting pipeline, 15-exhaust valve, 16-first pressure gauge, 17-second pressure gauge, 18-first powder channel hole, 19-second powder channel hole, 20-third powder channel hole, 21-first through channel hole, 22-second through channel hole, 23-third through channel hole, 24-first sealing ring, 25-second sealing ring, 26-third sealing ring, 27-fourth sealing ring, 28-fifth sealing ring, 29-sixth sealing ring, 30-upper stirring rod, 31-stirring rod protective cover, 32-lower stirring rod. DETAILED DESCRIPTION

[0041] The advantages of the present invention and the features of the technical solutions of the embodiments of the present invention are further described and explained in detail below in conjunction with the accompanying drawings of the embodiments of the present invention;

[0042] like Figure 3 FIG. 1 is a schematic diagram of the overall cross-sectional structure of an online powder adding system for a carrier gas powder feeder according to an embodiment of the present invention; the online powder adding system according to an embodiment of the present invention includes the following parts:

[0043] A powder feeding bin (1) and a powder feeder powder bin (3), wherein the lower part of the powder feeding bin and the upper part of the powder feeder powder bin are connected via the switching valve component (2) to form a powder feeding channel, and the powder is transported to the powder feeding tray component (4), and then transported to the working area via the powder feeding pipeline by the powder feeding tray component;

[0044] A powder adding port (7) is provided at the upper part of the powder adding bin; the powder adding port can be opened, and powder can be added into the powder adding bin from the powder adding port.

[0045] An air charging valve (8) is arranged on the upper part of the powder adding bin; the air charging valve is connected to the powder-carrying gas pipeline of the powder feeder, and the powder-carrying gas is injected into the powder adding bin by switching the air charging valve.

[0046] The switching valve component is composed of an upper valve plate (9), a valve plate (10) and a lower valve plate (11) which are sealed and connected; the valve plate changes its position in different ways so that the switching valve component is in a connected and disconnected state, thereby achieving the connection and disconnection of the powder adding bin and the powder bin space of the powder feeder.

[0047] The upper side of the powder adding bin and the upper side of the powder bin of the powder feeder are connected via a connecting pipe component (5);

[0048] The communicating pipe component is composed of an upper communicating pipe (12), a communicating valve (13) and a lower communicating pipe (14); the communicating pipe component can realize the connection and isolation of the powder adding bin and the powder bin of the powder feeder by switching the communicating valve.

[0049] The upper connecting pipe is provided with an exhaust valve (15) and a first pressure gauge (16); the exhaust valve can adjust the pressure of the powder-carrying gas inside the powder adding bin and the upper connecting pipe by opening and closing; the first pressure gauge can display the pressure of the powder-carrying gas inside the powder adding bin and the upper connecting pipe in real time.

[0050] The lower communicating pipeline is provided with a second pressure gauge (17); the second pressure gauge (17) can display the pressure of the powder-carrying gas inside the powder bin of the powder feeder and the lower communicating pipeline in real time.

[0051] The powder adding bin, the switching valve component and the middle part of the powder feeder bin are penetrated from top to bottom by a stirring component (6). The stirring component is provided with an upper stirring rod (30) and a stirring rod protective cover (31) in the powder adding bin. The upper stirring rod (30) continuously stirs the powder in the powder adding bin. The stirring component is provided with a lower stirring rod (32) in the powder feeder bin. The lower stirring rod is coaxially and tightly connected with the upper stirring rod to continuously stir the powder in the powder feeder bin.

[0052] like Figure 3 and Figure 4 As shown, the switching valve component is provided with a first powder channel hole (18), a second powder channel hole (19) and a third powder channel hole (20) from top to bottom, and the connection and disconnection of the powder channel are realized by changing the position of the second powder channel hole; the middle part of the switching valve component is provided with a first through channel hole (21), a second through channel hole (22) and a third through channel hole (23) from top to bottom, so as to realize the penetration of the stirring component from top to bottom; the above components are sealed and connected.

[0053] like Figure 5 As shown, the upper valve plate of the switching valve component is provided with a plurality of first powder channel holes, and a first sealing ring (24) is provided around the first powder channel hole to ensure the sealing isolation between the powder conveying channel and the space inside the valve; a second sealing ring (25) is provided around the edge of the upper valve plate to ensure the sealing isolation between the space inside the valve and the external space; a first through channel hole is provided at the center of the upper valve plate, and a third sealing ring (26) is installed in the first through channel hole to ensure the passage and sealing of the lower stirring rod of the stirring component.

[0054] like Figure 6As shown, the valve plate of the switching valve component is provided with a plurality of second powder channel holes; a second through channel hole is provided in the center of the valve plate, which is an oblong hole, to ensure that the stirring component penetrating from top to bottom can realize the switching action of connecting and disconnecting the powder channel through the valve plate.

[0055] like Figure 7 As shown, the lower valve plate of the switching valve component is provided with a plurality of third powder channel holes, and a fourth sealing ring (27) is provided around the third powder channel holes to ensure the sealed isolation between the powder conveying channel and the space inside the valve; a fifth sealing ring (28) is provided around the edge of the lower valve plate to ensure the sealed isolation between the space inside the valve and the external space; a third through channel hole is provided at the center of the lower valve plate, and a sixth sealing ring (29) is installed in the third through channel hole to ensure the passage and sealing of the lower stirring rod (32) of the stirring component.

[0056] The present invention uses specific examples to illustrate the implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An online powder adding system and control method for a carrier gas powder feeder, characterized in that: The invention comprises a powder adding bin (1) and a powder feeder bin (3), wherein the lower part of the powder adding bin and the upper part of the powder feeder bin are connected via the switching valve component (2) to form a powder feeding channel, and the powder is transported to the powder feeding plate component (4), and then the powder feeding plate component transports the powder to the working area via a powder feeding pipeline; a powder adding port (7) is arranged at the upper part of the powder adding bin; an air charging valve (8) is arranged at the upper part of the powder adding bin; the air charging valve is controlled by a second solenoid valve; the switching valve component is composed of an upper valve plate (9), a valve plate (10) and a lower valve plate (11) which are sealed and connected; the switching valve component is controlled by a fourth solenoid valve control; the upper side of the powder adding bin and the upper side of the powder feeder bin are connected via a connecting pipe component (5); the connecting pipe component is composed of an upper connecting pipe (12), a connecting valve (13) and a lower connecting pipe (14); the connecting valve is controlled by a third solenoid valve; an exhaust valve (15) and a first pressure gauge (16) are provided on the upper connecting pipe; a second pressure gauge (17) is provided on the lower connecting pipe; the powder adding bin, the switching valve component and the middle of the powder feeder bin are penetrated from top to bottom by a stirring component (6) to continuously stir the powders in the powder adding bin and the powder feeder bin.

2. The control method for an online powder adding system for a carrier gas powder feeder according to claim 1, characterized in that: The method comprises the following steps: step 1, the system control unit receives a powder adding signal, and makes the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the exhaust valve in a closed state; step 2, opening the exhaust valve to discharge the gas in the powder adding bin, so that the powder adding bin and the powder storage bin are both in an atmospheric pressure state; step 3, after the pressure monitoring unit detects that the value of the first pressure gauge reaches the requirement, the first solenoid valve is opened to allow the powder to enter the powder adding bin from the powder storage bin; step 4, after the amount of powder in the powder adding bin reaches the set value, the system control unit closes the first solenoid valve, controls the second solenoid valve and the exhaust valve to increase the pressure in the powder adding bin; step 5, the first pressure gauge and the second pressure gauge are compared in real time, and after the pressure reaches the set equal value interval, the third solenoid valve is opened to connect the powder adding bin and the powder feeder powder bin with equal pressure; step 6, the system control unit opens the fourth solenoid valve to allow the powder to enter the powder feeder powder bin from the powder adding bin, completing the non-stop online powder adding process.

3. The online powder adding system for a carrier gas powder feeder according to claim 1, characterized in that: The switching valve component is provided with a first powder channel hole (18), a second powder channel hole (19) and a third powder channel hole (20) from top to bottom, and the connection and disconnection of the powder channel are realized by changing the position of the second powder channel hole; the middle part of the switching valve component is provided with a first through channel hole (21), a second through channel hole (22) and a third through channel hole (23) from top to bottom, so as to realize the penetration of the stirring component from top to bottom; the above components are sealed and connected.

4. The online powder adding system for a carrier gas powder feeder according to claim 3, characterized in that: The upper valve plate of the switching valve component is provided with a plurality of first powder channel holes, and a first sealing ring (24) is provided around the first powder channel holes to ensure the sealing isolation between the powder conveying channel and the space inside the valve; a second sealing ring (25) is provided around the edge of the upper valve plate to ensure the sealing isolation between the space inside the valve and the external space; a first through channel hole is provided at the center of the upper valve plate, and a third sealing ring (26) is installed in the first through channel hole to ensure the passage and sealing of the lower stirring rod (32) of the stirring component.

5. The online powder adding system for a carrier gas powder feeder according to claim 3, characterized in that: The valve plate of the switching valve component is provided with a plurality of second powder channel holes; a second through channel hole is provided in the center of the valve plate, which is an oblong hole, to ensure that the stirring component penetrating from top to bottom can realize the switching action of connecting and disconnecting the powder channel through the valve plate.

6. The online powder adding system for a carrier gas powder feeder according to claim 3, characterized in that: The lower valve plate of the switching valve component is provided with a plurality of third powder channel holes, and a fourth sealing ring (27) is provided around the third powder channel holes to ensure the sealing isolation between the powder conveying channel and the space inside the valve; a fifth sealing ring (28) is provided around the edge of the lower valve plate to ensure the sealing isolation between the space inside the valve and the external space; a third through channel hole is provided at the center of the lower valve plate, and a sixth sealing ring (29) is installed in the third through channel hole to ensure the passage and sealing of the lower stirring rod of the stirring component.

7. The online powder adding system for a carrier gas powder feeder according to claim 1, characterized in that: The communicating pipeline component can realize the communication and isolation of the powder adding bin and the powder bin space of the powder feeder by switching the communicating valve.

8. The online powder adding system for a carrier gas powder feeder according to claim 1, characterized in that: The first pressure gauge can display the pressure of the powder-carrying gas inside the powder adding bin and the upper communicating pipe in real time.

9. The online powder adding system for a carrier gas powder feeder according to claim 1, characterized in that: The second pressure gauge can display the pressure of the powder-carrying gas inside the powder bin of the powder feeder and the lower communicating pipe in real time.

10. The online powder adding system for a carrier gas powder feeder according to claim 1, characterized in that: The exhaust valve can adjust the pressure of the powder-carrying gas inside the powder adding bin and the upper communicating pipe by opening and closing.

11. The online powder adding system for a carrier gas powder feeder according to claim 1, characterized in that: The stirring component is provided with an upper stirring rod (30) and a stirring rod protective cover (31) in the powder adding bin; the stirring component is provided with a lower stirring rod (32) in the powder bin of the powder feeder, and the lower stirring rod is coaxially and tightly connected with the upper stirring rod.

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