Heating and vacuumizing device for electronic special gas steel cylinder

Abstract

The utility model discloses a heating and vacuumizing device for an electronic special gas steel cylinder, which comprises a cylinder falling seat mechanism, a heating mechanism, a vacuumizing mechanism, a nitrogen replacement mechanism and a valve group, a cylinder body to be treated is loaded into the cylinder falling seat mechanism and is kept axially horizontal, and the heating mechanism is arranged to wrap the outer wall of the cylinder body to be treated in an opening and closing manner and is used for heating; the vacuumizing mechanism is communicated and connected with one end of a bottle body to be treated through a connecting hose, a first one-way valve, a vacuum gauge, a first stop valve, a nitrogen branch pipe and a barometer are distributed on the connecting hose, the nitrogen branch pipe is connected with a nitrogen storage tank, and a water content on-line detector is further connected to the position, close to the bottle body to be treated, of the connecting hose in a branching mode. According to the device, a plurality of layers of flexible heating plates are fixed on a moving trolley, heat transfer and radiation are carried out on a steel cylinder from outside to inside, water discharge is accelerated, and meanwhile, graded vacuumizing and high-purity nitrogen replacement are assisted, so that the steel cylinder can meet the requirements for residual granularity, grease content and water content of filled electronic special gas in a short time.

Description

Technical Field

[0001] This utility model relates to a device for drying and vacuuming the inner cavity of a bottle, and more particularly to a heating and vacuuming device for electronic special gas cylinders. Background Technology

[0002] Due to factors such as changes in external temperature and humidity, internal pressure, or incomplete drying of the inner wall after cleaning during the production process, electronic special gas cylinders may contain moisture inside the cylinder or the steel itself. This moisture can contaminate the electronic gas filled inside the cylinder, affecting its purity, and may even cause corrosion to the cylinder. Therefore, electronic special gas cylinders have very strict requirements for moisture content.

[0003] In the industry, heating and vacuuming methods typically employ electric ovens or natural gas heaters combined with vacuum systems. However, due to the large internal surface area and small diameter of the gas cylinders, the exchange of gases between the inside and outside is slow, resulting in long drying times. Furthermore, these methods suffer from drawbacks such as complex overall structure, large footprint, and high investment costs. Alternatively, hot nitrogen can be used for displacement heating, but this method also results in slow cylinder heating, long internal moisture removal times, and low efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a heating and vacuuming device for electronic specialty gas cylinders, so as to shorten the time required for the produced cylinders to meet the technical requirements for filling electronic specialty gases.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a heating and vacuuming device for electronic special gas cylinders, comprising a bottle-dropping mechanism, a heating mechanism, a vacuuming mechanism, a nitrogen replacement mechanism, and a valve group. The bottle to be treated is loaded into the bottle-dropping mechanism and kept axially horizontal. The heating mechanism is designed to open and close, wrapping around the outer wall of the bottle to be treated and heating it. The vacuuming mechanism is connected to one end of the bottle to be treated via a connecting hose. The connecting hose is equipped with a first one-way valve, a vacuum gauge, a first shut-off valve, a nitrogen branch pipe, and a pressure gauge. The nitrogen branch pipe is connected to a nitrogen storage tank, and the connecting hose is also branched near the bottle to be treated to a moisture content online detector.

[0006] Furthermore, the bottle-dropping mechanism consists of two tripod-shaped support frames, and each support frame is fitted with an arc-shaped plate at its top, suitable for overlapping the bottles to be processed.

[0007] Furthermore, the heating mechanism consists of a movable heating trolley on each side of the bottle-dropping mechanism. Each heating trolley is equipped with a wheeled frame, a heating fixing arc plate on the inner side of the frame, a housing that encloses the frame, and a multi-layer flexible heating plate installed in the heating fixing arc plate. At least two pairs of locking clamps are installed at the junction of the housings of the two heating trolleys.

[0008] Furthermore, the multi-layer flexible heating plate has inner and outer cover layers, a heater layer and a heat insulation buffer layer in between, and each heating trolley is equipped with five modularly mounted multi-layer flexible heating plates.

[0009] Furthermore, a pair of directional wheels are provided at the inner side of the four corners of the bottom of the frame, and a pair of omnidirectional wheels are provided at the outer side.

[0010] Furthermore, the bottle to be processed is provided with a head end plug and a closed tail end plug, and a male and female quick connector is provided between the head end plug and the connecting hose.

[0011] Furthermore, the nitrogen branch pipe is equipped with a second shut-off valve and a second check valve between the connecting hose and the nitrogen storage tank.

[0012] Furthermore, a third shut-off valve is provided between the connecting hose and the online moisture content analyzer.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The device uses a multi-layer flexible heating plate fixed to a mobile trolley, which is closed and directly attached to the outer wall of the bottle to be processed for heating. Heat is transferred and radiated from the outside to the inside of the steel cylinder to accelerate the discharge of moisture from the steel itself and the inside of the steel cylinder. At the same time, it is supplemented by vacuuming in stages and high-purity nitrogen replacement, so that the steel cylinder can meet the requirements of residual particle size, oil content (≤50mg / m²) and water content (≤0.5ppm) for filling electronic special gases in a short time. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall assembly structure of the heating and vacuuming device of this utility model.

[0015] Figure 2 This is a three-dimensional schematic diagram of the heating vacuum device of this utility model in the closed state of the heating mechanism.

[0016] Figure 3 yes Figure 2 A schematic diagram of the internal structure through a partial section from another perspective.

[0017] Figure 4 This is a schematic diagram of the axial section structure of the heating part of the bottle to be processed.

[0018] Figure 5 yes Figure 4 A cross-sectional schematic diagram of the layered structure of a multi-layer flexible heating plate. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so as to make the technical solution of this utility model easier to understand and master, and thus to make a clearer definition of the protection scope of this utility model.

[0020] This invention addresses the current industry problem of low efficiency in the internal drying process of electronic specialty gas cylinders after production. It designs and proposes a heating and vacuuming device for electronic specialty gas cylinders, which improves efficiency and eliminates potential process hazards in the production of electronic specialty gas storage containers.

[0021] like Figures 1 to 5 As shown, the heating and vacuuming device of this utility model comprises five main parts: a bottle-dropping mechanism 1, a heating mechanism, a vacuuming mechanism, a nitrogen replacement mechanism, and a valve group. Functionally, the device features a bottle 9 to be treated that is loaded into the bottle-dropping mechanism 1 and kept horizontally. The heating mechanism is designed to open and close, wrapping around the outer wall of the bottle and heating it. The vacuuming mechanism is connected to one end of the bottle via a connecting hose. The connecting hose is equipped with a first one-way valve 23, a vacuum gauge 21, a first shut-off valve 22, a nitrogen branch pipe 31, and a pressure gauge 41. The nitrogen branch pipe 31 is connected to a nitrogen storage tank 3. A second shut-off valve 33 and a second one-way valve 32 are located between the connecting hose and the nitrogen storage tank. Furthermore, a moisture content online detector 42 is connected to a branch of the connecting hose near the bottle, and a third shut-off valve 421 is located between the connecting hose and the moisture content online detector.

[0022] As can be seen from the overview of this scheme, the device mainly includes three design focuses: First, it is used to seat and maintain the axial horizontal position of the cylinder to be treated, while the heating mechanism transfers heat to the surface of the cylinder, utilizing the good thermal conductivity of the steel itself to achieve heating from the outside in, allowing the water vapor in the cylinder to evaporate evenly and quickly. This eliminates the need for electric drying ovens or natural gas heaters. It should be noted that this design does not require the cylinder to rotate during the treatment process; it only needs to remain stable and stationary. Second, it provides a common basic vacuuming configuration and optimizes the on / off control of the connecting hose at different sections and for phased operations through valve groups. Third, a nitrogen replacement mechanism is connected to the path of the connecting hose, allowing the inner liner of the cylinder to be filled with high-purity nitrogen. This works in conjunction with the vacuuming mechanism for dehumidification.

[0023] Looking at the features more closely, the bottle-dropping mechanism consists of a left support frame 11 and a right support frame 12, both of which are tripod-shaped. Each support frame is equipped with an arc-shaped plate 15 on top, which is suitable for overlapping the bottles to be processed, to prevent the cylinders from rolling and falling to the side.

[0024] The heating mechanism consists of a left heating carriage 7 and a right heating carriage 8 of the bottle-dropping mechanism 1. The two are mostly symmetrically arranged, so only the right heating carriage 8 will be described structurally. Figure 2 and Figure 3As shown, the heating trolley is equipped with a wheeled frame 23, a heating fixing arc plate 82 on the inner side of the frame, a housing that encloses the frame (illustrated by way of the housing 71 of the heating trolley on the other side), and a multi-layer flexible heating plate installed in the heating fixing arc plate. At least two pairs of locking clamps 52 are installed at the junction of the housings of the two heating trolleys.

[0025] The heating and fixing arc plate is a container carrier composed of several strips of arc-shaped plates welded together. The multi-layer flexible heating plate is modularly assembled and fixed within it. For example... Figure 4 and Figure 5 As shown, the multi-layer flexible heating plate 6 has inner and outer cover layers 61, a heater layer 62, and a heat insulation and buffer layer 63 between them. The inner and outer cover layers are made of insulating and heat-resistant materials, such as fiberglass cloth or polyvinyl alcohol fiber; the heat insulation and buffer layer is made of aluminum silicate fiber ceramic felt; and the heater layer includes, but is not limited to, nickel-chromium heating wire, iron-chromium-aluminum heating wire, ceramic heating rope, or plates. As shown in the diagram, each heating cart has five modularly mounted multi-layer flexible heating plates, such as the heating modules 73a~73e from the head shoulder to the tail shoulder of the left heating cart; and the heating modules 83a~83e from the head shoulder to the tail shoulder of the right heating cart.

[0026] Meanwhile, a pair of directional wheels 14 are provided at the inner side of the four corners of the bottom of the frame to keep the heating trolleys aligned when they are close together, while a pair of omnidirectional wheels 13 are provided at the outer side to finely adjust and correct their relative orientation. When the two heating trolleys are aligned, they mainly move back and forth along the direction of the bidirectional arrows shown in the figure.

[0027] In addition, the bottle body 9 to be processed is also provided with a head end plug 91 and a closed tail end plug 92, and a male and female quick connector 51 is provided between the head end plug and the connecting hose.

[0028] Based on the actual operation of heating and vacuuming electronic special gas cylinders, the steps can be summarized as follows: 1. Preparation stage: Insert the tail end plug 92 into one end of the cylinder to be treated to completely seal it, then insert the head end plug 91 into the other end of the cylinder to be treated, and connect the quick connector 51 (male) to the head end plug (female). At the same time, the connecting hose is also connected to the quick connector; the conventional connection method is omitted in detail.

[0029] 2. Place the gas cylinder onto the arc-shaped plates of the two support frames on the left and right sides to stabilize the cylinder. Then, bring the heating trolleys on both sides together and connect them into one unit using all the locking clamps.

[0030] 3. Check whether the readings of the relevant instruments are normal, and set the temperature control parameters of the multi-layer flexible heating plate according to the process requirements.

[0031] 4. Keep the second shut-off valve 33 and the third shut-off valve closed, open the first shut-off valve and the first check valve, start all multi-layer flexible heating plates and open the large-diameter vacuum unit 2 in the vacuum mechanism. Heat and vacuum the bottle to be processed. When the control instrument of the vacuum gauge 21 displays 1.0E-1Pa, close the first shut-off valve and the large-diameter vacuum unit.

[0032] 5. Keep all shut-off valves in place and maintain pressure on the bottle to be treated for 5 minutes. If there is no change in the reading of the vacuum gauge, close the first check valve and open the second shut-off valve and the second check valve. High-purity nitrogen at room temperature enters the bottle to be treated through the nitrogen branch pipe to break the vacuum inside the bottle. When the pressure on pressure gauge 41 reaches 1 MPa, close the second shut-off valve.

[0033] 6. Keep the second and third shut-off valves closed, and reopen the first check valve, the first shut-off valve, and the large-diameter vacuum pump unit. When the vacuum gauge control instrument displays 1.0E-1Pa, close the first check valve and the large-diameter vacuum pump unit again.

[0034] 7. Open the third shut-off valve to test the moisture content. After the moisture content meets the standard, test the residual particle size and oil content. If the above three indicators fail, analyze the cause and eliminate the problem. Repeat steps 3 to 7 until all indicators meet the standard. The testing and analysis of the three indicators are not part of the technical solution of this application, so the detailed process is omitted.

[0035] In summary, the above description and detailed implementation of the heating and vacuuming device for electronic specialty gas cylinders demonstrate that this solution possesses substantial features and advancements. The technical effects of this device are as follows: it uses multi-layer flexible heating plates fixed to a mobile trolley, which are closed and directly adhere to the outer wall of the cylinder to be processed for heating. Heat is transferred and radiated from the outside to the inside of the cylinder to accelerate the removal of moisture from the steel itself and inside the cylinder. Simultaneously, it is supplemented by staged vacuuming and high-purity nitrogen replacement, enabling the cylinder to meet the requirements for residual particle size, oil content (≤50mg / m²), and water content (≤0.5ppm) for filling electronic specialty gases in a short time.

[0036] In addition to the above embodiments, the present invention may have other implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. A heating and vacuuming device for electronic special gas cylinders, characterized in that: The device includes a bottle-dropping mechanism, a heating mechanism, a vacuuming mechanism, a nitrogen purging mechanism, and a valve group. The bottle to be treated is loaded into the bottle-dropping mechanism and kept horizontally. The heating mechanism is designed to open and close, wrapping around the outer wall of the bottle to be treated and heating it. The vacuuming mechanism is connected to one end of the bottle to be treated via a connecting hose. The connecting hose is equipped with a first one-way valve, a vacuum gauge, a first shut-off valve, a nitrogen branch pipe, and a pressure gauge. The nitrogen branch pipe is connected to a nitrogen storage tank, and the connecting hose is also branched near the bottle to be treated to a moisture content online detector.

2. The heating and vacuuming device for electronic special gas cylinders according to claim 1, characterized in that: The bottle-dropping mechanism consists of two tripod-shaped support frames, and each support frame is fitted with an arc-shaped plate on top, which is suitable for overlapping the bottles to be processed.

3. The heating and vacuuming device for electronic special gas cylinders according to claim 1, characterized in that: The heating mechanism consists of a movable heating trolley on each side of the bottle-dropping mechanism. Each heating trolley is equipped with a wheeled frame, a heating fixing arc plate on the inner side of the frame, a housing that encloses the frame, and a multi-layer flexible heating plate installed in the heating fixing arc plate. At least two pairs of locking clamps are installed at the junction of the housings of the two heating trolleys.

4. The heating and vacuuming device for electronic special gas cylinders according to claim 3, characterized in that: The multi-layer flexible heating plate has inner and outer cover layers, a heater layer and a heat insulation buffer layer in between, and each heating trolley is equipped with five modularly mounted multi-layer flexible heating plates.

5. The heating and vacuuming device for electronic special gas cylinders according to claim 3, characterized in that: The bottom of the frame has a pair of directional wheels located on the inner side of the four corners and a pair of omnidirectional wheels located on the outer side.

6. The heating and vacuuming device for electronic special gas cylinders according to claim 1, characterized in that: The bottle to be processed is provided with a head end plug and a closed tail end plug, and a male and female quick connector is provided between the head end plug and the connecting hose.

7. The heating and vacuuming device for electronic special gas cylinders according to claim 1, characterized in that: The nitrogen branch pipe is equipped with a second shut-off valve and a second check valve between the connecting hose and the nitrogen storage tank.

8. The heating and vacuuming device for electronic special gas cylinders according to claim 1, characterized in that: A third shut-off valve is provided between the connecting hose and the online moisture content analyzer.

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