Airtight powder supply device

Abstract

The application discloses a closed powder supply device, which comprises a powder storage barrel, a plurality of spraying assemblies, a first gas source, a second gas source and a plurality of switching valve modules. The powder storage barrel has a powder storage cavity and a plurality of communication ports communicating with the powder storage cavity. Each switching valve module comprises a switching valve body and a valve core assembly. The switching valve body is provided with a valve cavity. The switching valve body is provided with a first conveying port, a second conveying port, a first air inlet and a second air inlet communicating with the valve cavity. The valve core assembly is actuated to make the switching valve module have at least a first on-off state and a second on-off state. In the first on-off state, the first conveying port and the second conveying port are communicated. In the second on-off state, the first conveying port and the second conveying port are blocked. The first conveying port is communicated with the first gas source, and the second conveying port is communicated with the second gas source. The design forms a closed powder supply environment, improves the spraying quality, reduces the waste of spraying materials, simplifies the powder changing process and improves the powder changing efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spraying equipment, in particular to a closed powder supply device. BACKGROUND

[0002] The powder supply device is used for storing powder for spraying and supplying powder for a spraying assembly. After spraying a workpiece, powder needs to be replaced and the inside of the powder supply device needs to be cleaned. This process needs to be completed by a worker. Therefore, the upper part of the transmission channel of the previous powder supply device is in a non-closed state. However, even so, the powder replacement process is relatively troublesome. In addition, the non-closed transmission environment can easily cause the powder to be contaminated, affect the spraying quality, waste spraying materials, and increase the cost of materials. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application provides a closed powder supply device, a closed powder supply environment, improved spraying quality, reduced waste of spraying materials, simplified powder replacement process, and improved powder replacement efficiency.

[0004] According to the closed powder supply device of the first aspect of the present application, the closed powder supply device comprises a powder storage barrel, a plurality of spraying assemblies, a first gas source and a second gas source, and a plurality of switching valve modules. Each switching valve module comprises a switching valve body and a valve core assembly. The switching valve body is provided with a valve cavity. The switching valve body is provided with a first delivery port, a second delivery port, a first gas inlet, and a second gas inlet which are in communication with the valve cavity. The valve core assembly is arranged in the switching valve body and partially located in the valve cavity. The first delivery port is connected to the communication port through a first transmission pipe. The second delivery port is connected to the spraying assembly through a second transmission pipe. The first gas inlet is connected to the first gas source. The second gas inlet is connected to the second gas source. The valve core assembly is actuated to make the switching valve module have at least a first on-off state and a second on-off state. In the first on-off state, the gas path between the first delivery port and the second delivery port is in communication. In the second on-off state, the gas path between the first delivery port and the second delivery port is blocked. The first delivery port is in communication with the first gas source. The second delivery port is in communication with the second gas source.

[0005] According to the closed powder supply device of the present application, at least the following beneficial effects are achieved:

[0006] The closed powder supply device, during the spraying process, the valve core assembly is actuated to make the switching valve module in the first on-off state, the first conveying port is communicated with the second conveying port, the powder in the powder storage cavity is transmitted from the communicating port, the first transmission pipe and the first conveying port, and then is transmitted to the spraying assembly from the second conveying port and the second transmission pipe, and the transmission environment is closed, and when the powder needs to be changed, the valve core assembly is actuated to make the switching valve module in the second on-off state, the first gas source and the second gas source respectively output gas, the gas flow output by the first gas source enters the communicating port from the first conveying port to clean the powder storage cavity, and the gas flow output by the second gas source enters the spraying assembly from the second conveying port, so that the spraying assembly is cleaned, the closed powder supply environment is formed, the spraying quality is improved, the waste of the spraying material is reduced, the powder changing process is simplified, and the powder changing efficiency is improved.

[0007] According to some embodiments of the application, the bottom of the powder storage barrel is provided with an on-off valve, the on-off valve has a powder inlet and a first powder outlet, the powder inlet of the on-off valve is communicated with the powder storage cavity, the on-off valve is opened to make the powder inlet and the first powder outlet communicated, and the on-off valve is closed to make the powder inlet and the first powder outlet blocked.

[0008] According to some embodiments of the application, the powder storage barrel is further provided with a second powder outlet communicated with the powder storage cavity, and one end of the powder suction pipe assembly is communicated with the second powder outlet.

[0009] According to some embodiments of the application, the valve core assembly comprises an elastic air bag and a gas charging and discharging member, the elastic air bag is arranged in the valve cavity and located between the first conveying port and the second conveying port, the first gas inlet and the first conveying port are located on the same side of the elastic air bag, the second gas inlet and the first conveying port are located on the same side of the elastic air bag, the gas charging and discharging member is communicated with the elastic air bag, the gas charging and discharging member can charge the elastic air bag, the elastic air bag expands to block the gas path between the first conveying port and the second conveying port, and the gas charging and discharging member can discharge the elastic air bag, and the elastic air bag shrinks to make the gas path between the first conveying port and the second conveying port communicated.

[0010] According to some embodiments of the application, the storage shell is provided with a powder storage cavity, one end of the first powder conveying pump is communicated with the powder storage cavity through a third transmission pipe, and the other end of the first powder conveying pump is communicated with the powder storage cavity through a fourth transmission pipe.

[0011] According to some embodiments of the application, the screen assembly is arranged in the fourth transmission pipe.

[0012] According to some embodiments of the present application, the powder recycling pipe assembly comprises a powder recycling pipe and a first air blower arranged in the powder recycling pipe, and the powder outlet of the powder recycling pipe is connected to one end of the second powder conveying pump through a fifth conveying pipe.

[0013] According to some embodiments of the present application, the powder recycling pipe assembly comprises a powder recycling pipe and a first air blower arranged in the powder recycling pipe, and the powder outlet of the powder recycling pipe is connected to one end of the second powder conveying pump through a fifth conveying pipe.

[0014] According to some embodiments of the present application, the communication port is provided in plurality, and the plurality of communication ports are arranged uniformly around the circumference of the powder storage cavity.

[0015] According to some embodiments of the present application, the control module is further provided, and the first air source is provided in plurality, and the control module is electrically connected to each of the first air sources respectively to control the start and stop of each of the first air sources.

[0016] Additional aspects and advantages of the present application will be made apparent from the following description, which, taken in conjunction with the accompanying drawings, that will further illustrate the principles and practical application of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0018] Figure 1 FIG. 1 is a schematic diagram of the internal structure of one embodiment of the powder supply device of the present application;

[0019] Figure 2 FIG. 3 is a schematic diagram of the connection structure of the powder storage barrel;

[0020] Figure 3 FIG. 5 is a sectional view of the internal structure of the switching valve module in the first on-off state;

[0021] Figure 4 FIG. 6 is a sectional view of the internal structure of the switching valve module in the second on-off state.

[0022] REFERENCE NUMERALS:

[0023] Powder storage barrel 100; communication port 110; first air source 200; second air source 300; switching valve module 400; switching valve body 410; valve cavity 411; first conveying port 412; second conveying port 413; first air inlet 414; second air inlet 415; valve core assembly 420; elastic air bag 421; air charging and discharging member 422; storage shell 510; first powder conveying pump 520; screen assembly 530; powder suction pipe assembly 540; on-off valve 550. DETAILED DESCRIPTION

[0024] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.

[0025] In the description of the present application, it should be understood that, in relation to orientation description, for example, the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is two or more. Greater than, less than, more than, and the like are understood as not including the number, and above, below, and the like are understood as including the number. If it is described that the first, the second is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance of the indicated technical features or implying a specific number of the indicated technical features or implying a specific order of the indicated technical features.

[0027] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] As Figures 1-4As shown, according to the first aspect of the present application, a closed powder supply device comprises a powder storage barrel 100, a plurality of spraying assemblies (not shown in the figure), a first air source 200, a second air source 300, and a plurality of switching valve modules 400. The powder storage barrel 100 has a powder storage cavity and a plurality of communication ports 110 in communication with the powder storage cavity. Each switching valve module 400 comprises a switching valve body 410 and a valve core assembly 420. The switching valve body 410 is provided with a valve cavity 411. The switching valve body 410 is provided with a first delivery port 412, a second delivery port 413, a first air inlet 414, and a second air inlet 415 in communication with the valve cavity 411. The valve core assembly 420 is arranged in the switching valve body 410 and partially located in the valve cavity 411. The first delivery port 412 is connected to the communication port 110 through a first transmission pipe one by one. The second delivery port 413 is connected to the spraying assembly through a second transmission pipe one by one. The first air inlet 414 is connected to the first air source 200. The second air inlet 415 is connected to the second air source 300. The valve core assembly 420 operates to make the switching valve module 400 have at least a first on-off state and a second on-off state. In the first on-off state, the first delivery port 412 and the second delivery port 413 are in communication. In the second on-off state, the first delivery port 412 and the second delivery port 413 are blocked. The first delivery port 412 is in communication with the first air source 200. The second delivery port 413 is in communication with the second air source 300.

[0029] Here, the first transmission pipe and the second transmission pipe can be a hose. Similarly, the third transmission pipe, the fourth transmission pipe, the fifth transmission pipe, and the sixth transmission pipe proposed below can also be a hose.

[0030] The first air source 200 and the second air source 300 can be air pumps. The air pumps can drive external air to be output to the first air inlet 414 and the second air inlet 415. The air pumps can also be connected to gas cylinders storing gas, thereby supplying gas to the first air inlet 414 and the second air inlet 415.

[0031] The spraying assembly can comprise a spray gun and a third powder delivery pump. One end of the third powder delivery pump is in communication with the second delivery port 413. The other end of the third powder delivery pump is in communication with the spray gun.

[0032] The closed powder supply device, during the spraying process, the valve core assembly 420 is actuated to make the switching valve module 400 in the first on-off state, the first conveying port 412 is communicated with the second conveying port 413, the powder in the powder storage cavity enters the first conveying port 412 from the communication port 110 and the first transmission pipe, and then is transmitted to the spraying assembly from the second conveying port 413 and the second transmission pipe, and the transmission environment is closed, and when the powder needs to be changed, the valve core assembly 420 is actuated to make the switching valve module 400 in the second on-off state, the first gas source 200 and the second gas source 300 respectively output gas, the gas flow output by the first gas source 200 enters the communication port 110 from the first conveying port 412 to clean the powder storage cavity, and the gas flow output by the second gas source 300 enters the spraying assembly from the second conveying port 413, so that the spraying assembly is cleaned, the closed powder supply environment is formed, the spraying quality is improved, the waste of the spraying material is reduced, the powder changing process is simplified, and the powder changing efficiency is improved.

[0033] In some embodiments of the present application, as shown in Figure 1 The storage shell 510 is provided with a powder storage cavity, one end of the first powder conveying pump 520 is communicated with the powder storage cavity through a third transmission pipe, and the other end of the first powder conveying pump 520 is communicated with the powder storage cavity through a fourth transmission pipe.

[0034] The staff can place the powder in the powder storage cavity, the storage shell 510 can be conical, the third transmission pipe is connected with the conical part of the powder storage cavity, the powder can move to the conical part position to facilitate the conveying of the powder, and the first powder conveying pump 520 drives the powder to be transmitted to the powder storage cavity.

[0035] In some embodiments of the present application, as shown in Figure 1 The screen assembly 530 is arranged in the fourth transmission pipe.

[0036] In order to facilitate the addition of powder, the powder storage cavity is in a relatively open state, the screen assembly 530 can filter the powder to prevent foreign matter from mixing into the powder storage cavity.

[0037] Specifically, the screen assembly 530 can be an ultrasonic screen or a filter screen arranged in the fourth transmission pipe.

[0038] In some embodiments of the present application, the recycling pipe assembly and the second powder conveying pump (not shown in the figure) are further included, the powder outlet of the recycling pipe assembly is connected with one end of the second powder conveying pump through a fifth transmission pipe, and the other end of the second powder conveying pump is communicated with the powder storage cavity through a sixth transmission pipe.

[0039] In the spraying device, a relatively closed spraying chamber is generally included, the spraying guns are multiple and are located in the spraying chamber, the workpiece is placed in the spraying chamber, the spraying guns spray the workpiece, and the recovery port of the recovery pipe assembly is communicated with the spraying chamber, the recovery pipe assembly can be connected by multiple pipe bodies, the powder not attached to the surface of the workpiece can be sucked into the recovery pipe assembly, and is returned to the powder storage cavity through the recovery pipe assembly.

[0040] In some embodiments of the present application, the recovery pipe assembly includes a recovery pipe and a first fan arranged in the recovery pipe, the powder outlet of the recovery pipe is connected with one end of the second powder conveying pump through the fifth conveying pipe, and the first fan can be a cross-flow first fan, which can drive the air flow in the recovery pipe, so that the powder in the spraying chamber is sucked into the recovery pipe, thereby reducing the waste of powder and saving material cost.

[0041] When powder needs to be replaced, the powder in the powder storage barrel 100 needs to be discharged first, and the spraying assembly and the powder storage cavity need to be cleaned, so, as shown in Figure 1 the bottom of the powder storage barrel 100 is provided with an on-off valve 550, the on-off valve 550 has a powder inlet and a first powder discharge port, the powder inlet of the on-off valve 550 is communicated with the powder storage cavity, the on-off valve 550 is opened to communicate between the powder inlet and the first powder discharge port, and the on-off valve 550 is closed to block the communication between the powder inlet and the first powder discharge port.

[0042] After entering the powder replacement, the switching valve module 400 is controlled to enter the second on-off state, the on-off valve 550 is opened, the powder inlet and the first powder discharge port are communicated, the workers can collect the powder discharged at the first powder discharge port, so as to recycle, at the same time, the second gas source 300 supplies gas, since the second gas source 300 and the first conveying port 412 are blocked from each other, the powder discharge of the powder storage barrel 100 is not affected, that is, the spraying assembly can be cleaned, and after the powder in the powder storage barrel 100 is basically recycled, the first gas source 200 supplies gas flow to the first conveying port 412, at this time, the residual powder in the powder storage barrel 100 is cleaned.

[0043] In some embodiments of the present application, as shown in Figure 1 the powder extraction pipe assembly 540 is further included, the upper portion of the powder storage barrel 100 is provided with a second powder discharge port communicated with the powder storage cavity, and one end of the powder extraction pipe assembly 540 is communicated with the second powder discharge port.

[0044] The powder extraction pipe assembly 540 can be composed of a powder extraction pipe and a second fan arranged in the powder extraction pipe, after the powder in the powder storage barrel 100 is basically recycled, the on-off valve 550 is closed, the first gas source 200 supplies gas flow to the first conveying port 412 to clean the inner wall of the powder storage cavity, and the powder extraction pipe assembly 540 operates to discharge the residual powder, thereby deeply cleaning the powder storage cavity.

[0045] In some embodiments of the present application, as shown in Figure 3 , 4 The valve core assembly 420 includes an elastic air bag 421 and a gas charging and discharging member 422. The elastic air bag 421 is arranged in the valve cavity 411 and located between the first delivery port 412 and the second delivery port 413. The first air inlet 414 and the second air inlet 415 are located on the same side of the elastic air bag 421 as the first delivery port 412. The gas charging and discharging member 422 is in communication with the elastic air bag 421. The gas charging and discharging member 422 can inflate the elastic air bag 421. The elastic air bag 421 expands to block the air path between the first delivery port 412 and the second delivery port 413. The gas charging and discharging member 422 can deflate the elastic air bag 421. The elastic air bag 421 shrinks to connect the air path between the second delivery port 413 and the first delivery port 412.

[0046] The gas charging and discharging member 422 can be selected from a conventional air pump. When the elastic air bag 421 is inflated, the elastic air bag 421 expands to block the air path between the first delivery port 412 and the second delivery port 413. When the elastic air bag 421 is deflated, the elastic air bag 421 shrinks to connect the air path between the second delivery port 413 and the first delivery port 412. Therefore, the first on-off state and the second on-off state can be switched quickly.

[0047] In some embodiments of the present application, as shown in Figure 1 , 2 The communication port 110 has a plurality of communication ports 110, and the plurality of communication ports 110 are uniformly arranged around the circumference of the powder storage cavity. When powder is supplied, the divided powder can be delivered from each communication port 110 to each spraying assembly, and the powder is uniformly delivered, so that each spraying assembly can obtain sufficient powder, and at the same time, the inner circumferential wall of the powder storage cavity can be fully cleaned when the powder is changed.

[0048] In some embodiments of the present application, a control module is further included. The first gas source 200 has a plurality of first gas sources 200, and the control module is electrically connected to each first gas source 200 to control the start and stop of each first gas source 200.

[0049] The control module can be composed of an MCU, a CPU, and an auxiliary circuit. The control module can not only control the first gas source 200, but also control the start and stop of the second gas source 300, the on-off of the switch valve 550, the state switching of the switching valve module 400, the start and stop of the first powder conveying pump 520, the start and stop of the second powder conveying pump, the start and stop of the first air blower, and the start and stop of the second air blower.

[0050] The control module controls each first gas source 200 respectively, and when cleaning the powder storage cavity, the local position can be cleaned in a targeted manner, so that the cleaning effect is better, and the probability of mixing different powders is reduced.

[0051] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist in contradiction, they should be considered as falling within the scope of the present disclosure.

[0052] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A closed powder supply device, characterized by comprising: The application relates to a powder spraying device, which comprises the following components: a powder storage barrel having a powder storage cavity and a plurality of communication ports communicating with the powder storage cavity; a plurality of spraying assemblies; a first gas source and a second gas source; a plurality of switching valve modules, each of which comprises a switching valve body and a valve core assembly, the switching valve body is provided with a valve cavity, the switching valve body is provided with a first conveying port, a second conveying port, a first air inlet and a second air inlet which communicate with the valve cavity, the valve core assembly is arranged in the switching valve body and partially located in the valve cavity, the first conveying port is connected with the communication port through a first transmission pipe in one-to-one correspondence, the second conveying port is connected with the spraying assembly through a second transmission pipe in one-to-one correspondence, the first air inlet is connected with the first gas source, and the second air inlet is connected with the second gas source, wherein the valve core assembly is actuated to make the switching valve module have at least a first on-off state and a second on-off state, in the first on-off state, the gas path between the first conveying port and the second conveying port is communicated, in the second on-off state, the gas path between the first conveying port and the second conveying port is blocked, the first conveying port is communicated with the first gas source, and the second conveying port is communicated with the second gas source; the valve core assembly comprises an elastic air bag and a gas charging and discharging member, the elastic air bag is arranged in the valve cavity and located between the first conveying port and the second conveying port, the first air inlet and the first conveying port are located on the same side of the elastic air bag, the second air inlet and the first conveying port are located on the same side of the elastic air bag, the gas charging and discharging member communicates with the elastic air bag, the gas charging and discharging member can inflate the elastic air bag, the elastic air bag expands to block the gas path between the first conveying port and the second conveying port, the gas charging and discharging member can deflate the elastic air bag, and the elastic air bag shrinks to communicate the gas path between the first conveying port and the second conveying port.

2. A closed powder supply device according to claim 1, characterized in that: The bottom of the powder storage barrel is provided with an on-off valve, the on-off valve has a powder inlet and a first powder outlet, the powder inlet of the on-off valve communicates with the powder storage cavity, the on-off valve is opened to communicate the powder inlet and the first powder outlet, and the on-off valve is closed to block the powder inlet and the first powder outlet.

3. The closed powder supply device according to claim 1, characterized in that: The upper portion of the powder storage barrel is provided with a second powder outlet which communicates with the powder storage cavity, one end of a powder suction pipe assembly communicates with the second powder outlet.

4. The closed powder supply device according to claim 1, characterized by: A storage shell and a first powder conveying pump are further arranged, the storage shell is provided with a powder storage cavity, one end of the first powder conveying pump communicates with the powder storage cavity through a third transmission pipe, and the other end of the first powder conveying pump communicates with the powder storage cavity through a fourth transmission pipe.

5. A closed powder supply device according to claim 4, characterized in that: A screen assembly is further arranged in the fourth transmission pipe.

6. The closed powder supply device according to claim 1, characterized by: A recovery pipe assembly and a second powder conveying pump are further arranged, the powder outlet of the recovery pipe assembly is connected with one end of the second powder conveying pump through a fifth transmission pipe, and the other end of the second powder conveying pump communicates with the powder storage cavity through a sixth transmission pipe.

7. A closed powder supply device according to claim 6, characterized in that: The recovery pipe assembly comprises a recovery pipe and a first fan arranged in the recovery pipe, and a powder outlet of the recovery pipe is connected with one end of the second powder conveying pump through a fifth conveying pipe.

8. The closed powder supply device according to claim 1, characterized in that: The plurality of communication openings are uniformly arranged around the circumference of the powder storage cavity.

9. A closed powder supply device according to claim 8, characterized in that: The control module is further included, the first air sources are multiple, and the control module is electrically connected with each first air source to control each first air source respectively.

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