Foldable gas washing device and forming cabin with foldable gas washing device

Abstract

The utility model belongs to the technical field of laser directional energy deposition manufacturing, and relates to a foldable gas washing device which comprises a gas supply assembly and a foldable gas washing assembly. The folding gas washing assembly is arranged in a cavity needing gas washing, and the folding gas washing assembly is unfolded or folded in the cavity. According to the utility model, when the folding gas washing assembly is unfolded in the cavity, the internal air pressure is reduced, the air supply assembly supplies air, and along with the downward movement of the folding gas washing assembly, the occupied volume of the forming cabin is increased, and the volume of gas washing required by the subsequent forming cabin is reduced; after gas washing is completed, the folding gas washing assembly begins to be folded, the internal air pressure is increased, and the gas supply assembly stores redundant inert gas. The arranged folding gas washing assembly is unfolded in the cavity, the volume of gas needing to be washed in the cavity is reduced, and then inert gas needed for gas washing of the cavity is reduced; and meanwhile, the gas supply assembly automatically supplies and stores gas, so that the inert gas is recycled, and the consumption of the inert gas and the operation cost are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of laser directional energy deposition manufacturing, and particularly relates to a foldable gas washing device and a forming cabin with the foldable gas washing device. BACKGROUND

[0002] The laser directional energy deposition technology uses a laser beam as a high-temperature heat source and synchronously transports metal powder or wire through a powder feeding or wire feeding device. During this process, the powder or wire and part of the base material rapidly melt under the action of the high-energy laser beam, and then solidify to form a deposition layer in close combination with the base material. To ensure that the deposition process proceeds according to the pre-designed path, the laser deposition head moves under the precise control of a computer, and gradually builds the required formed part in a bottom-up and layer-by-layer accumulation manner.

[0003] To ensure the quality of the formed part and avoid the adverse effects of oxidation reaction on the deposition layer, the entire forming process needs to be carried out in an environment with extremely low oxygen content. For this purpose, the forming movement mechanism and the workbench are placed in a forming cabin, which is filled with inert gas to create a low-oxygen-content gas environment, ensuring that the laser directional energy deposition technology can successfully and high-quality complete the processing and forming of parts.

[0004] There is some research on the gas environment preparation device for the forming cabin in the prior art. Referring to the patent document with the application number 202111614052.4, a large forming cabin for electric arc additive manufacturing is disclosed, which includes a box body, a gas exchange system and a gas washing system are arranged on the outer side of the box body; the gas exchange system contains an argon gas pipeline; the gas washing system contains a circulating fan, the end of the circulating fan is fixedly installed with a conveying pipeline, the other end of the circulating fan is fixedly installed with a purification column, the other end of the purification column is connected to the inside of the box body through the conveying pipeline, the outer side of the purification column is provided with a regeneration system, and the regeneration system and the purification column are in circulation communication through the conveying pipeline. As can be seen, by the arrangement of the gas exchange system and the gas washing system, the air is pumped out and the argon gas is filled at the same time, the gas exchange process is carried out in the box body, the water and oxygen content in the gas in the box body can be quickly reduced to a certain level, and the gas in the box body is washed by the arrangement of the several purification columns, so that the water and oxygen content in the gas in the box body is reduced to below 50ppm, and the gas washing of the forming cabin is realized.

[0005] However, during the gas washing process of the forming cabin, a large amount of inert gas needs to be continuously provided by an external gas storage device to maintain the gas environment in the forming cabin. The price of inert gas is high, resulting in high operating cost. UTILITY MODEL CONTENTS

[0006] In order to solve the technical problem of high operation cost caused by the need for external gas storage device to continuously provide a large amount of inert gas during the gas washing process of the forming cabin in the background art, the utility model provides a foldable gas washing device and a forming cabin with the foldable gas washing device.

[0007] The utility model foldable gas washing device, when folding the gas washing assembly is unfolded in the cavity, the volume increases, the internal air pressure reduces, at this moment, the gas supply assembly supplies air, simultaneously, with the folding gas washing assembly moves downward in the cavity, the volume of the forming cabin increases, reduces the volume required for subsequent forming cabin gas washing, after the gas washing is finished, the folding gas washing assembly starts to fold, the volume reduces, the internal air pressure increases, at this moment, the gas supply assembly stores the excess inert gas by pressure difference, in preparation for subsequent recycling. The folding gas washing assembly is set, through the unfolding in the cavity, the volume required for the gas washing in the cavity is reduced, and then the inert gas required for the gas washing in the cavity is reduced, simultaneously, the gas supply assembly can automatically supply air and store air, realizes the recycling of the inert gas, thereby the consumption of the inert gas and the operation cost are reduced.

[0008] In order to solve the above technical problem, the utility model provides the following technical scheme:

[0009] A foldable gas washing device, comprising: a gas supply assembly and a folding gas washing assembly, the folding gas washing assembly is arranged in a cavity requiring gas washing, and the folding gas washing assembly is unfolded or folded in the cavity, the gas supply assembly is in communication with the folding gas washing assembly, and the gas supply assembly is located outside the cavity and is used for filling inert gas into the folding gas washing assembly.

[0010] In a specific implementation, the folding gas washing assembly comprises a folding cabin body and a driving member, the folding cabin body is unfolded or folded in the cavity, and the end of the folding cabin body is connected with the driving member, and the driving member drives the folding cabin body to switch between the unfolded state and the folded state.

[0011] In a specific implementation, the bottom of the folding cabin body is connected with a traction door, and the driving member is connected with the traction door.

[0012] In a specific implementation, a limiting member is arranged on the folding cabin body, and the limiting member is used for limiting the movement range of the folding cabin body when the folding cabin body is unfolded or folded.

[0013] In a specific implementation, a plurality of sets of limiting members are arranged, and the plurality of sets of limiting members are uniformly distributed along the extension direction of the folding cabin body.

[0014] In a specific implementation, the driving member comprises a pulley, a steel wire and a driving motor, one end of the steel wire is connected with the traction door, the other end of the steel wire is connected with the output end of the driving motor after passing through the pulley, and the limiting member is connected with the steel wire.

[0015] In one specific implementation, the gas supply assembly includes a gas tank and a delivery pipeline; the gas tank is in communication with the folding cabin through the delivery pipeline, and is used to deliver inert gas into the folding cabin.

[0016] In one specific implementation, a pressurizing pump control system is connected to the delivery pipeline, and is used to adjust the delivery direction of the inert gas in the delivery pipeline.

[0017] A shaped cabin with a folding gas washing device includes a shaped cabin body and the folding gas washing device; the folding cabin is arranged in the shaped cabin body, is unfolded during gas washing, or is folded and sealed to the shaped cabin body after the gas washing is completed; the pulley and the driving motor are connected to the top of the shaped cabin body.

[0018] In one specific implementation, the oxygen content in the folding cabin is less than 100 ppm before unfolding; and the inner cavity of the shaped cabin body maintains a micro-positive pressure state.

[0019] In summary, the present application has the following beneficial technical effects:

[0020] 1. The folding gas washing device and the shaped cabin with the folding gas washing device can increase the volume and reduce the internal air pressure when the folding gas washing assembly is unfolded in the cavity, at which time the gas supply assembly supplies gas to the folding gas washing assembly; meanwhile, as the folding gas washing assembly moves downward in the cavity, the volume occupied by the shaped cabin increases, and the volume of the subsequent shaped cabin required for gas washing is reduced; after the gas washing is completed, the folding gas washing assembly starts to fold, the volume is reduced, and the internal air pressure is increased, at which time the gas supply assembly stores the excess inert gas in the folding gas washing assembly by using the pressure difference, for subsequent recycling. The folding gas washing assembly is arranged to reduce the volume of the cavity required for gas washing by unfolding in the cavity, thereby reducing the inert gas required for cavity gas washing; at the same time, the gas supply assembly can automatically supply and store gas, realizing the recycling of inert gas, thereby reducing the consumption of inert gas and the operating cost.

[0021] 2. The folding gas washing device can adapt to shaped cabins of different sizes by adjusting the size and shape of the folding cabin, improving the versatility and flexibility of the folding gas washing device. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the overall schematic view of the folding gas washing device of the present application.

[0023] Figure 2 is the overall structural schematic view of the shaped cabin with the folding gas washing device of the present application, and the folding gas washing device is in a completely unfolded state in the view.

[0024] Figure 3 Figure 1 is a whole structure schematic diagram of the forming cabin with the foldable gas washing device according to the present application, and the foldable gas washing device is in a completely folded state.

[0025] Mark explanation: 1, folding cabin body; 2, driving part; 21, pulley; 22, steel wire; 3, traction door; 4, limiting part; 5, gas storage tank; 6, conveying pipeline; 7, pressurizing pump control system; 8, forming cabin body. DETAILED DESCRIPTION

[0026] The technical scheme of the present application will be further explained and described below in combination with the drawings and embodiments, but the present application is not limited to the following described embodiments.

[0027] The present application is mainly used for the gas washing of the super large size (>4*4*4m) forming cabin, the volume of the folding gas washing assembly is changed to reduce the volume of the gas washing required by the forming cabin, and then the inert gas required for the cavity gas washing is reduced, and then the gas washing cost is reduced.

[0028] Referring to Figure 1 , a foldable gas washing device comprises a gas supply assembly and a folding gas washing assembly. The folding gas washing assembly is arranged in a cavity requiring gas washing, and the folding gas washing assembly is unfolded or folded in the cavity; the gas supply assembly is in communication with the folding gas washing assembly, and the gas supply assembly is located outside the cavity and is used for filling inert gas into the folding gas washing assembly.

[0029] In the present application, the inert gas can be argon, nitrogen, helium and the like, the inert gas is filled into the foldable assembly to achieve the gas washing effect of the cavity, and such inert gas can achieve the expected gas washing purpose. Preferably, the inert gas is argon.

[0030] Referring to Figure 1 , the folding gas washing assembly comprises a folding cabin body 1 and a driving part 2. The folding cabin body 1 is unfolded or folded in the cavity, and the end of the folding cabin body 1 is connected with the driving part 2; the driving part 2 drives the folding cabin body 1 to switch between the unfolded state and the folded state.

[0031] Referring to Figure 1 , the folding cabin body 1 is connected with a traction door 3 at the bottom; the driving part 2 is connected with the traction door 3.

[0032] In the utility model, the traction door 3 is sealed with the cavity after the folding cabin body 1 is folded, dust in the printing process of the formed piece is prevented from entering the folding cabin body 1, simultaneously, the folding cabin body 1 is stably unfolded or folded under the gravity of the traction door 3, the folding cabin body 1 is prevented from shaking due to airflow flow in the gas washing process, and the stability of the folding cabin body 1 is improved. The traction door 3 can be a metal door, a plastic door, a rubber door or the like, the traction door 3 is sealed with the cavity by arranging the traction door 3, and then dust in the printing process of the formed piece is prevented from entering the folding cabin body 1, and the setting mode is all available. Preferably, the traction door 3 is a metal door.

[0033] Referring to Figure 1 The limiting piece 4 is arranged on the folding cabin body 1, and the limiting piece 4 is used for limiting the movement range of the folding cabin body 1 when the folding cabin body 1 is unfolded or folded.

[0034] In the utility model, the limiting piece 4 can be arranged in six groups, can be arranged in seven groups, or can be arranged in eight groups, and the limiting piece 4 with a proper number of groups is arranged, so that the folding cabin body 1 is accurately positioned during unfolding or folding, and the folding cabin body 1 is prevented from exceeding the predetermined movement range, and the setting mode is all available. Preferably, in the utility model, the limiting piece 4 is arranged in eight groups, and the eight groups of limiting pieces 4 are uniformly distributed along the extension direction of the folding cabin body 1.

[0035] Referring to Figure 1 The driving piece 2 comprises a pulley 21, a steel wire 22 and a driving motor. One end of the steel wire 22 is connected with the traction door 3, the other end is connected with the output end of the driving motor after passing through the pulley 21, and the limiting piece 4 is connected with the steel wire 22.

[0036] Specifically, the driving piece 2 can be arranged in two groups, can be arranged in three groups, or can be arranged in four groups, and the driving piece 2 with a proper number is arranged, so that the folding cabin body 1 moves stably, and the setting mode is all available.

[0037] In the utility model, the driving piece 2 is composed of the driving motor, the pulley 21 and the steel wire 22, the automatic movement of the folding cabin body 1 is realized, manual intervention is not needed, and the automation degree of the gas washing process is improved.

[0038] Referring to Figure 1 The gas supply assembly comprises a gas storage tank 5 and a conveying pipeline 6. The gas storage tank 5 is communicated with the inside of the folding cabin body 1 through the conveying pipeline 6 and is used for conveying inert gas into the folding cabin body 1.

[0039] Specifically, the folding cabin body 1 is provided with a vent hole at the top, so that the inert gas enters or flows out of the inner cavity of the folding cabin body 1 from the vent hole.

[0040] Referring to Figure 1The conveying pipeline 6 is connected with a pressurizing pump control system 7. The pressurizing pump control system 7 adjusts the conveying direction of the inert gas in the conveying pipeline 6; specifically, the pressure in the gas storage tank 5 is relatively large, and the pressure in the folded cabin body 1 is relatively small, when the inert gas flows from the side with large pressure to the side with small pressure, the pressurizing pump control system 7 adjusts the flow of the inert gas in the conveying pipeline 6, and when the inert gas flows from the side with small pressure to the side with large pressure, the pressurizing pump control system 7 pressurizes the inert gas in the conveying pipeline 6.

[0041] A shaped cabin with a foldable gas washing device, comprising a shaped cabin body 8 and the foldable gas washing device described above. The folded cabin body 1 is placed in the shaped cabin body 8, unfolded during the gas washing process, or folded and sealed to the shaped cabin body 8 after the gas washing is completed; the pulley 21 and the driving motor are connected to the top of the shaped cabin body 8.

[0042] Specifically, the inside of the shaped cabin body 8 and the inside of the folded cabin body 1 are both provided with oxygen sensors and pressure sensors. The oxygen sensor is used to detect the oxygen content, and the pressure sensor is used to detect the gas pressure.

[0043] More specifically, the folded cabin body 1 unfolds in the cavity, the volume of the folded cabin body 1 gradually increases, the internal gas pressure gradually decreases, as the folded cabin body 1 continuously unfolds, the volume occupied by the shaped cabin body 8 increases, reducing the volume required for the shaped cabin to wash gas; after the folded cabin body 1 is completely unfolded, the shaped cabin body 8 is washed by the gas washing device, so that the oxygen content in the shaped cabin body 8 is less than 100ppm, wherein the gas washing device is a gas washing device known to those skilled in the art. The specific operation process is as follows: open the gas inlet valve of the gas washing device to allow inert gas to enter the shaped cabin body 8, at the same time, the oxygen sensor in the shaped cabin body 8 monitors the oxygen content in the shaped cabin body 8, when the oxygen content is reduced to within 100ppm, close the gas inlet valve of the gas washing device, stop washing; the folded cabin body 1 starts to fold, the volume of the folded cabin body 1 gradually decreases, the internal gas pressure gradually increases, in this process, the gas storage tank 5 starts to store excess inert gas under the action of the pressure difference, and finally the folded cabin body 1 is completely folded.

[0044] Referring to Figure 2 and Figure 3 , before the folded cabin body 1 is unfolded, the oxygen content in the inner cavity of the folded cabin body 1 is less than 100ppm before unfolding; the inner cavity of the shaped cabin body 8 maintains a slightly positive pressure state. The slightly positive pressure state refers to a state in which the pressure in the inner cavity of the shaped cabin body 8 is higher than the external environment by (10±5) Pa.

[0045] Specifically, the folding cabin 1 is washed by a gas washing device to make the oxygen content in the folding cabin 1 less than 100 ppm, wherein the gas washing device is a gas washing device known to those skilled in the art. The specific operation process is as follows: open the inlet valve of the gas washing device to allow inert gas to enter the folding cabin 1, and at the same time, the oxygen sensor in the folding cabin 1 monitors the oxygen content in the folding cabin 1. When the oxygen content is reduced to less than 100 ppm, close the inlet valve of the gas washing device to stop washing; then adjust the control system 7 of the pressurizing pump to make the gas tank 5 deliver inert gas to the folding cabin 1 to maintain the micro-positive pressure state of the inner cavity of the folding cabin 1.

[0046] More specifically, the inner cavity of the folding cabin 1 is filled with inert gas. If the gas in the shaped cabin body 8 leaks, the inert gas in the folding cabin 1 acts as a buffer to prevent oxygen or other harmful gases from rapidly entering the interior of the shaped cabin body 8, thereby protecting the safety of the shaped cabin body 8 and the operator.

[0047] Embodiment 1:

[0048] With reference to Figure 1 In this embodiment, the folding gas washing device, the limiting piece 4 is a slide buckle. The slide buckle is composed of a circular ring and a fixed rod connected with the circular ring. The steel wire 22 passes through the circular ring, and the fixed rod is fixedly connected with the folding cabin 1.

[0049] In this embodiment, the slide buckle is arranged to make the circular ring slide along the steel wire 22 during the unfolding or folding process of the folding cabin 1, so as to ensure that the relative position of the slide buckle and the folding cabin 1 remains unchanged, thereby avoiding that the folding cabin 1 exceeds the predetermined moving range, and the operation is convenient.

[0050] Embodiment 2:

[0051] With reference to Figure 1 In this embodiment, the folding gas washing device, the limiting piece 4 is a limiting pin. One end of the limiting pin is connected with the folding cabin 1, and the other end is connected with the steel wire 22.

[0052] In this embodiment, the limiting pin is arranged to accurately position the folding cabin 1 during the unfolding or folding process, thereby avoiding that the folding cabin 1 exceeds the predetermined moving range.

[0053] Embodiment 3:

[0054] With reference to Figure 1 In this embodiment, the folding gas washing device, the driving piece 2 is provided with two groups, and the two groups of driving pieces 2 are distributed along the width direction of the folding cabin 1.

[0055] In this embodiment, the two groups of driving pieces 2 are arranged to facilitate the control of the unfolding and folding of the two sides of the folding cabin 1 in the width direction, thereby facilitating the smooth movement of the folding cabin 1.

[0056] The working principle of the forming cabin with the foldable gas washing device is as follows: in the state that the foldable cabin body 1 is folded and sealed, the gas washing operation on the foldable cabin body 1 is started; inert gas is filled into the foldable cabin body 1, and the original oxygen in the cabin is gradually extruded until the oxygen content in the foldable cabin body 1 is reduced to within 100 ppm, the gas washing operation on the foldable cabin body 1 is stopped, the pressurizing pump control system 7 is adjusted, the inert gas is delivered to the foldable cabin body 1 through the gas storage tank 5, the inner cavity of the foldable cabin body 1 is ensured to maintain a slightly positive pressure state, and external air is prevented from penetrating; the driving motor drives the pulley 21 and the steel wire 22, so that the foldable cabin body 1 starts to unfold in the cavity, the volume of the foldable cabin body 1 gradually increases, and the internal air pressure gradually decreases; in this process, in order to maintain the air pressure and the inert gas concentration in the cabin, the gas storage tank 5 supplies gas to the foldable cabin body 1, and simultaneously, as the foldable cabin body 1 is continuously unfolded, the volume occupied by the forming cabin body 8 increases, and the volume required for subsequent forming cabin gas washing is reduced; after the gas washing is completed, the driving motor drives the pulley 21 and the steel wire 22, so that the foldable cabin body 1 starts to fold, the volume of the foldable cabin body 1 gradually decreases, and the internal air pressure gradually increases; in this process, the gas storage tank 5 starts to store the excess inert gas under the action of the pressure difference, and finally the foldable cabin body 1 is completely folded, and the traction door 3 is sealed with the forming cabin body 8.

[0057] The preferred embodiment of the utility model is not limited to the protection scope of the utility model, and therefore: any equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A foldable air washing device, characterized in that: include: Air supply assembly and folding air washing assembly; The foldable air-washing assembly is placed in a cavity that needs to be air-washed, and the foldable air-washing assembly is unfolded or folded in the cavity; The air supply component is communicated with the folding air washing component, and the air supply component is located outside the cavity and is used to fill the folding air washing component with inert gas.

2. The foldable air-washing device according to claim 1, characterized in that: The folding air-washing assembly comprises a folding cabin (1) and a driving member (2); The folding cabin (1) is unfolded or folded in the cavity, and the end of the folding cabin (1) is connected to the driving member (2); The driving member (2) drives the folding cabin (1) to switch between an unfolded state and a folded state.

3. The foldable air-washing device according to claim 2, characterized in that: The bottom of the folding cabin (1) is connected to a traction door (3); The driving member (2) is connected to the traction door (3).

4. The foldable air-washing device according to claim 3, characterized in that: A limiting member (4) is provided on the folding cabin body (1), and the limiting member (4) is used to limit the movement range of the folding cabin body (1) when the folding cabin body (1) is unfolded or folded.

5. The foldable air-washing device according to claim 4, characterized in that: The limiting members (4) are provided in multiple groups, and the multiple groups of limiting members (4) are evenly distributed along the extension direction of the folding cabin (1).

6. The foldable air-washing device according to claim 5, characterized in that: The driving member (2) includes a pulley (21), a steel wire (22) and a driving motor; One end of the steel wire (22) is connected to the traction door (3), and the other end is connected to the output end of the driving motor after passing around the pulley (21); The limiting member (4) is connected to the steel wire (22).

7. The foldable air-washing device according to claim 6, characterized in that: The gas supply assembly comprises a gas storage tank (5) and a delivery pipeline (6); The gas storage tank (5) is in communication with the interior of the folding cabin (1) via a delivery pipe (6) and is used to deliver inert gas into the folding cabin (1).

8. The foldable air-washing device according to claim 7, characterized in that: The delivery pipeline (6) is connected to a pressure pump control system (7), and the pressure pump control system (7) is used to adjust the delivery direction of the inert gas in the delivery pipeline (6).

9. A forming cabin with a foldable air-washing device, characterized in that: It comprises a forming cabin body (8) and the foldable air-washing device according to any one of claims 6 to 8; The folding cabin body (1) is placed in the forming cabin body (8) and unfolded during the air washing process, or folded and sealed to the forming cabin body (8) after the air washing is completed; The pulley (21) and the driving motor are both connected to the top of the forming chamber body (8).

10. The forming cabin with a foldable air-washing device according to claim 9, characterized in that: The oxygen content in the inner cavity of the folding cabin (1) is lower than 100 ppm before unfolding; and the inner cavity of the forming cabin body (8) maintains a slightly positive pressure state.

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