Gas leakage prevention structure of gas conveying cabinet

Abstract

The utility model relates to the technical field of gas delivery cabinet protection, in particular to a gas leakage prevention structure of a gas delivery cabinet, which comprises a sealing assembly arranged at an opening of a cabinet body and used for sealing a gap between the cabinet body and a cabinet door, and a gap exists between the sealing assembly and the inner wall of the cabinet body. According to the utility model, the two gas paths are respectively arranged, the vacuumizing assembly can be selectively communicated with the required chamber in the cabinet body through the switching assembly, and when the sealing assembly is aged, gas leaks into the sealing chamber and reaches a certain concentration, the gas concentration detector gives an alarm; the switching assembly enables the air exhaust end of the vacuumizing assembly to be communicated with the second air channel, air in the sealing cavity is exhausted, and therefore the device can remind a worker of overhauling through the air concentration detector, the device is matched with existing vacuumizing equipment to conduct emergency treatment on leaked air, excessive air accumulation is prevented, and enough time is won for fault finding.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas conveying cabinet protection technical field especially, it relates to a gas conveying cabinet's gas leakproof structure. BACKGROUND

[0002] At present, because gas conveying cabinet needs to reduce the moisture content in the cabinet body and prevent gas leakage to reach the limit vacuum degree when using, therefore, vacuumizing is an important step, in order to guarantee that external air cannot enter the cabinet body from the cabinet opening and destroy the vacuum environment, the cabinet opening of gas conveying cabinet is generally provided with a sealing strip, when the cabinet door is closed, pressure can be applied to the sealing strip to make it deform, and then fully fit the gap between the cabinet door and the cabinet opening.

[0003] However, with the change of time, the sealing performance of the sealing strip will be aged due to temperature, humidity or chemical corrosion, etc., resulting in a decrease in sealing effect, when the pipeline in the internal containing chamber of the cabinet body just starts to leak, because the initial leakage amount is very small, and the gas concentration is also low, it is usually difficult to find, with the accumulation of time, the gas leakage amount gradually increases, resulting in an increase in concentration, when found, a large amount of harmful gas has been accumulated, causing unnecessary trouble to the maintenance work. SUMMARY

[0004] Therefore, the purpose of the utility model is to provide a gas leakproof structure of a gas conveying cabinet to solve the technical problem that the existing gas conveying cabinet is difficult to find and handle in time after gas leakage.

[0005] To achieve the above purpose, the utility model provides a gas leakproof structure of a gas conveying cabinet, which comprises:

[0006] A sealing assembly arranged at the cabinet opening and used for sealing the gap between the cabinet and the cabinet door, wherein a gap exists between the sealing assembly and the inner wall of the cabinet, so that the sealing assembly, the cabinet and the cabinet door jointly enclose a sealing chamber which is independent of the containing chamber in the sealed cabinet;

[0007] A vacuumizing assembly having an air extraction end, wherein a first gas path is arranged between the air extraction end and the containing chamber, and a second gas path is arranged between the air extraction end and the sealing chamber;

[0008] A switching assembly used for switching the first gas path or the second gas path;

[0009] A gas concentration detector arranged in the sealing chamber, so that when the detector detects leaked gas in the sealing chamber, the second gas path is switched and the leaked gas is extracted by the vacuumizing assembly.

[0010] As a preferred technical scheme of the utility model, the sealing assembly comprises:

[0011] An inner edge plate arranged on the inner wall of the opening of the cabinet body;

[0012] A frame connected to the inner edge plate, the side of the frame has a gap with the inner wall of the cabinet body, and a through slot is formed in one side of the frame for the outer sleeve to pass through;

[0013] A sealing gasket connected to the other end of the frame.

[0014] As a preferred technical scheme of the present application, a plurality of first positioning holes are formed at the corners of the frame, the first positioning holes are matched with second positioning holes formed on the surface of the inner edge plate, and a positioning member is arranged in the first positioning holes and the second positioning holes.

[0015] As a preferred technical scheme of the present application, the switching assembly comprises:

[0016] An outer sleeve provided with a first air inlet hole, a second air inlet hole and a first air outlet hole, the first air inlet hole and the first air outlet hole form a first air path of a communication containing chamber, the second air inlet hole and the first air outlet hole form a second air path of a communication sealing chamber, and the first air outlet hole is in communication with the air outlet end of the vacuumizing assembly;

[0017] An inner sleeve slidingly arranged in the outer sleeve, the inner sleeve is provided with a third air inlet hole matched with the first air inlet hole, and the third air inlet hole and the first air inlet hole are mutually misaligned, the inner sleeve is provided with a fourth air inlet hole matched with the second air inlet hole, and the inner sleeve is provided with a second air outlet hole matched with the first air outlet hole;

[0018] A driving structure for driving the inner sleeve to slide inside the inner sleeve to select the third air inlet hole to be connected with the first air inlet hole or the fourth air inlet hole to be connected with the second air inlet hole.

[0019] As a preferred technical scheme of the present application, the driving structure comprises:

[0020] A connecting rod connected to the inner sleeve at one end, the other end of the connecting rod penetrates the outer sleeve and is connected with a connecting plate;

[0021] A gas cylinder fixedly arranged on the cabinet body, and the output end of the gas cylinder is connected with the connecting plate.

[0022] As a preferred technical scheme of the present application, the vacuumizing assembly comprises: a gas pump arranged outside the cabinet body, and a first gas conveying pipe connected between the air outlet end of the gas pump and the first air outlet hole.

[0023] As the preferred technical scheme of the utility model, the vacuumizing assembly further comprises a second gas conveying pipe connected with the exhaust end of the air pump, the second gas conveying pipe is connected with an electromagnetic valve, and a quick connector is arranged at the port of the second gas conveying pipe.

[0024] As the preferred technical scheme of the utility model, the quick connector is connected with the air purification box.

[0025] As the preferred technical scheme of the utility model, the inner sleeve pipe is provided with a sealing ring at one end thereof facing the first air inlet hole, and the sealing ring is provided with a fifth air inlet hole matched with the third air inlet hole.

[0026] The utility model discloses the beneficial effect: the utility model discloses through setting up two gas paths respectively, can through switching assembly selectively connect the vacuumizing assembly with the required chamber in the cabinet body, when the first gas path is communicated with the air exhaust end of vacuumizing assembly, can remove the air in the internal housing chamber of cabinet, when the sealing assembly is aged and leads to the gas leakage into the sealed chamber and reaches certain concentration, the gas concentration detector alarms, and switching assembly makes the air exhaust end of vacuumizing assembly and the second gas path communicate, and the gas in the sealed chamber is removed, therefore, the device can remind the staff to overhaul through the gas concentration detector, and cooperate with the existing vacuumizing equipment to handle the leakage gas in an emergency, prevent the gas accumulation too much, and strive for enough time for the fault discovery. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0028] Figure 1 It is the external three-dimensional structure schematic diagram of the utility model;

[0029] Figure 2 It is the cabinet body local section three-dimensional structure schematic diagram of the utility model;

[0030] Figure 3 It is the Figure 2 Enlarged structure schematic diagram of the utility model in A place;

[0031] Figure 4 It is the inner edge plate, frame and sealing pad three-dimensional structure schematic diagram of the utility model;

[0032] Figure 5 It is the air pump, outer sleeve pipe, first gas conveying pipe and second gas conveying pipe three-dimensional structure schematic diagram of the utility model;

[0033] Figure 6 It is the local section solid structure schematic diagram of the outer sleeve pipe and the inner sleeve pipe of the utility model.

[0034] In the figure, mark as: 1, cabinet body;2, inner edge board;3, frame;4, sealing gasket;5, first positioning hole;6, second positioning hole;7, positioning piece;8, outer sleeve pipe;9, through slot;10, first air inlet;11, first air outlet;12, first gas pipe;13, air pump;14, second gas pipe;15, electromagnetic valve;16, quick coupling;17, second air inlet;18, inner sleeve pipe;19, third air inlet;20, fourth air inlet;21, sealing ring;22, fifth air inlet;23, second air outlet;24, connecting rod;25, connecting plate;26, air cylinder;27, gas concentration detector. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is further detailed in combination with specific embodiments.

[0036] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the utility model should be understood as the usual meaning by those skilled in the art to which the utility model belongs. The "first", "second" and similar words used in the utility model do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connection" or "connection" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] As shown in Figure 1 and Figure 2 A gas leakage prevention structure of a gas conveying cabinet, comprising: a sealing assembly arranged at an opening of a cabinet body 1 for sealing the gap between the cabinet body 1 and a cabinet door, a gap existing between the sealing assembly and the inner wall of the cabinet body 1, so that the sealing assembly, the cabinet body 1 and the cabinet door together enclose a sealing chamber independent of a containing chamber in the sealed cabinet body 1;A vacuumizing assembly having a gas suction end, a first gas path connecting the gas suction end and the containing chamber, and a second gas path connecting the gas suction end and the sealing chamber;A switching assembly for switching the first gas path or the second gas path;A gas concentration detector 27 arranged in the sealing chamber, so that when the leakage gas in the sealing chamber is detected, the second gas path is switched and the leakage gas is pumped out by the vacuumizing assembly;

[0038] The above technical scheme can conveniently process the leaked gas without stopping. In normal use, the switching assembly is used to make the air outlet end of the vacuum assembly communicate with the first gas path, so that the air in the cabinet 1 is pumped out. When the sealing assembly leaks, the gas in the accommodating chamber of the cabinet 1 enters the sealing chamber through the sealing assembly. When the gas concentration in the sealing chamber reaches a preset value, the gas concentration detector 27 sends an alarm, and the controller starts the switching assembly, so that the air outlet end of the vacuum assembly communicates with the second gas path, and the gas in the sealing chamber is pumped out by the vacuum assembly. The device can remind the staff to repair through the gas concentration detector 27, and cooperate with the existing vacuum equipment to process the leaked gas in an emergency, so as to gain enough time to find the fault.

[0039] As shown in Figure 2 and Figure 3 In this embodiment, the sealing assembly includes an inner edge plate 2 arranged on the inner wall of the opening of the cabinet 1, a frame 3 connected to one end of the inner edge plate 2, a gap between the side of the frame 3 and the inner wall of the cabinet 1, a through slot 9 provided on one side of the frame 3 for the outer sleeve 8 to pass through, a sealing gasket 4 connected to the other end of the frame 3, a plurality of first positioning holes 5 provided at the corners of the frame 3, and a second positioning hole 6 provided on the surface of the inner edge plate 2, and a positioning piece 7 arranged in the first positioning hole 5 and the second positioning hole 6.

[0040] The above technical scheme can conveniently separate the accommodating chamber in which the pipeline in the cabinet 1 is located from the outside, so as to selectively pump normally or absorb the leaked gas. After the cabinet door is closed, the sealing gasket 4 is attached to the cabinet door, so as to form an annular sealing chamber between the sealing gasket 4, the frame 3, the inner wall of the cabinet 1 and the cabinet door. The sealing chamber is used to cooperate with the vacuum assembly to absorb the leaked gas, without affecting the normal vacuum degree in the cabinet 1.

[0041] As shown in Figure 6 In this embodiment, the switching assembly includes an outer sleeve 8 provided with a first air inlet hole 10, a second air inlet hole 17 and a first air outlet hole 11, the first air inlet hole 10 and the first air outlet hole 11 form a first gas path for communicating the accommodating chamber, the second air inlet hole 17 and the first air outlet hole 11 form a second gas path for communicating the sealing chamber, and the first air outlet hole 11 is connected to the air outlet end of the vacuum assembly; an inner sleeve 18 slidingly arranged in the outer sleeve 8, the inner sleeve 18 is provided with a third air inlet hole 19 matched with the first air inlet hole 10, and the third air inlet hole 19 and the first air inlet hole 10 are mutually staggered, the inner sleeve 18 is provided with a fourth air inlet hole 20 matched with the second air inlet hole 17, and the inner sleeve 18 is provided with a second air outlet hole 23 matched with the first air outlet hole 11.

[0042] As shown in Figure 5As shown, in the embodiment, the switching assembly further comprises a driving structure for driving the inner sleeve 18 to slide inside the inner sleeve 18 to select the third air inlet hole 19 to be connected with the first air inlet hole 10 or the fourth air inlet hole 20 to be connected with the second air inlet hole 17; specifically, the driving structure comprises a connecting rod 24 connected with the inner sleeve 18 at one end, the other end of the connecting rod 24 penetrating through the outer sleeve 8 and being connected with a connecting plate 25; a cylinder 26 is fixedly arranged on the cabinet 1, and an output end of the cylinder 26 is connected with the connecting plate 25;

[0043] The above technical scheme can realize switching of the first air path and the second air path; when normal vacuumizing is needed, the cylinder 26 drives the inner sleeve 18 to slide through the connecting plate 25 and the connecting rod 24, so that one end of the third air inlet hole 19 of the inner sleeve 18 is away from one end of the first air inlet hole 10 of the outer sleeve 8, the first air path is connected, at this time, the fourth air inlet hole 20 and the second air inlet hole 17 are staggered, so the second air path is blocked, the vacuumizing assembly is started, and the air in the internal accommodating cavity of the cabinet 1 is sequentially extracted through the first air inlet hole 10, the third air inlet hole 19, the second air outlet hole 23 and the first air outlet hole 11;

[0044] When it is needed to extract the leakage gas in the sealed cavity, the cylinder 26 drives the inner sleeve 18 to slide through the connecting plate 25 and the connecting rod 24, so that one end of the third air inlet hole 19 of the inner sleeve 18 is in close contact with one end of the first air inlet hole 10 of the outer sleeve 8, because the third air inlet hole 19 and the first air inlet hole 10 are staggered, the first air path is blocked, at this time, the fourth air inlet hole 20 and the second air inlet hole 17 are aligned, so the second air path is connected, the gas in the sealed cavity of the cabinet 1 is sequentially extracted through the second air inlet hole 17, the fourth air inlet hole 20, the second air outlet hole 23 and the first air outlet hole 11, in order to prevent the cabinet 1 from being deformed due to excessive negative pressure, a pressure relief valve can also be arranged to control the negative pressure in the cabinet 1 to be in a proper range.

[0045] As shown in Figure 1 and Figure 5 In the embodiment, the vacuumizing assembly comprises a gas pump 13 arranged outside the cabinet 1, and a first gas conveying pipe 12 connected between an air suction end of the gas pump 13 and the first air outlet hole 11; the vacuumizing assembly further comprises a second gas conveying pipe 14 connected with an air exhaust end of the gas pump 13, the second gas conveying pipe 14 is connected with an electromagnetic valve 15, and a quick connector 16 is arranged at a port of the second gas conveying pipe 14;

[0046] The above technical scheme can realize vacuumizing through the gas pump 13.

[0047] Further, in the embodiment, the quick connector 16 is connected with an air purification tank;

[0048] The above technical scheme can filter the leakage gas, avoiding being directly discharged into the air.

[0049] As Figure 6 shown in the embodiment, the inner sleeve 18 is provided with a sealing ring 21 at one end thereof facing the first air inlet hole 10, and the sealing ring 21 is provided with a fifth air inlet hole 22 matched with the third air inlet hole 19;

[0050] The above technical scheme can ensure that the second air path is connected and the first air path is closed, thereby preventing the vacuum environment in the cabinet 1 from being damaged when absorbing leaked gas.

[0051] Working principle: the cylinder 26 drives the inner sleeve 18 to slide through the connecting plate 25 and the connecting rod 24, so that one end of the inner sleeve 18 with the third air inlet hole 19 is away from one end of the outer sleeve 8 with the first air inlet hole 10, the first air path is connected, at this time, the fourth air inlet hole 20 is staggered with the second air inlet hole 17, so that the second air path is blocked, the air pump 13 is started, and the air in the accommodating cavity in the cabinet 1 is sequentially extracted through the first air inlet hole 10, the third air inlet hole 19, the second air outlet hole 23, the first air outlet hole 11 and the first air conveying pipe 12;

[0052] When the sealing assembly leaks due to aging, the gas in the accommodating cavity in the cabinet 1 enters the sealing cavity through the sealing assembly, when the gas concentration in the sealing cavity reaches a preset value, the gas concentration detector 27 issues an alarm, the cylinder 26 drives the inner sleeve 18 to slide through the connecting plate 25 and the connecting rod 24, so that one end of the inner sleeve 18 with the third air inlet hole 19 is attached to one end of the outer sleeve 8 with the first air inlet hole 10, due to the staggered arrangement of the third air inlet hole 19 and the first air inlet hole 10, the first air path is blocked, at this time, the fourth air inlet hole 20 is aligned with the second air inlet hole 17, so that the second air path is connected, the gas in the sealing cavity in the cabinet 1 is sequentially extracted through the second air inlet hole 17, the fourth air inlet hole 20, the second air outlet hole 23, the first air outlet hole 11 and the first air conveying pipe 12, and the gas in the sealing cavity is extracted through the vacuumizing assembly.

[0053] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary, and is not intended to limit the scope of the utility model (including claims) to these examples; under the concept of the utility model, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the utility model as described above, which are not provided in details for the sake of brevity.

[0054] The utility model aims at covering all such replacements, modifications and variations falling within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A gas leakage preventing structure of a gas supply cabinet, characterized by comprising: The application relates to a cabinet sealing device. The sealing assembly is arranged at the opening of the cabinet body (1) and used for sealing the gap between the cabinet body (1) and the cabinet door; the sealing assembly has a gap with the inner wall of the cabinet body (1) so that the sealing assembly, the cabinet body (1) and the cabinet door jointly form a sealed chamber which is independent of the accommodating chamber in the cabinet body (1); The vacuumizing assembly has a vacuumizing end, a first gas path between the vacuumizing end and the accommodating chamber, and a second gas path between the vacuumizing end and the sealed chamber; The switching assembly is used for switching the first gas path or the second gas path; The gas concentration detector (27) is arranged in the sealed chamber and used for switching to the second gas path and vacuumizing the leaked gas through the vacuumizing assembly when the leaked gas in the sealed chamber is detected.

2. The gas leakage preventing structure of the gas supply cabinet according to claim 1, wherein The sealing assembly comprises: an inner edge plate (2) arranged at the inner wall of the opening of the cabinet body (1); a frame (3) connected with one end of the inner edge plate (2), the side edge of the frame (3) has a gap with the inner wall of the cabinet body (1), and the frame (3) is provided with a through groove (9) on one side for the outer sleeve (8) to pass through; a sealing gasket (4) connected with the other end of the frame (3).

3. The gas leakage preventing structure of the gas supply cabinet according to claim 2, wherein The frame (3) is provided with a plurality of first positioning holes (5) at the corners, the first positioning holes (5) are matched with second positioning holes (6) arranged on the surface of the inner edge plate (2), and the first positioning holes (5) and the second positioning holes (6) are provided with positioning members (7).

4. The gas leakage preventing structure of a gas supply cabinet according to claim 1, wherein The switching assembly comprises: an outer sleeve (8) provided with a first air inlet hole (10), a second air inlet hole (17) and a first air outlet hole (11), the first air inlet hole (10) and the first air outlet hole (11) form the first gas path which is communicated with the accommodating chamber, the second air inlet hole (17) and the first air outlet hole (11) form the second gas path which is communicated with the sealed chamber, and the first air outlet hole (11) is communicated with the vacuumizing end of the vacuumizing assembly; an inner sleeve (18) slidingly arranged in the outer sleeve (8), the inner sleeve (18) is provided with a third air inlet hole (19) matched with the first air inlet hole (10), the third air inlet hole (19) and the first air inlet hole (10) are mutually dislocated, the inner sleeve (18) is provided with a fourth air inlet hole (20) matched with the second air inlet hole (17), and the inner sleeve (18) is provided with a second air outlet hole (23) matched with the first air outlet hole (11); a driving structure used for driving the inner sleeve (18) to slide along the inner sleeve (18) so as to select the third air inlet hole (19) to be communicated with the first air inlet hole (10) or the fourth air inlet hole (20) to be communicated with the second air inlet hole (17).

5. The gas leakage preventing structure of the gas supply cabinet according to claim 4, wherein The driving structure comprises: a connecting rod (24) connected with one end of the inner sleeve (18), the other end of the connecting rod (24) penetrates through the outer sleeve (8) and is connected with a connecting plate (25); a gas cylinder (26) fixedly arranged on the cabinet body (1), and the output end of the gas cylinder (26) is connected with the connecting plate (25).

6. The gas leakage preventing structure of a gas supply cabinet according to claim 4, wherein The vacuumizing assembly comprises an air pump (13) arranged outside the cabinet (1), and a first air conveying pipe (12) connected between the air pump (13) and a first air outlet hole (11).

7. The gas leakage preventing structure of the gas supply cabinet according to claim 6, wherein The vacuumizing assembly further comprises a second air conveying pipe (14) connected with an air outlet end of the air pump (13), and an electromagnetic valve (15) connected with the second air conveying pipe (14), and a quick connector (16) arranged at a port of the second air conveying pipe (14).

8. The gas leakage preventing structure of the gas supply cabinet according to claim 7, wherein The quick connector (16) is connected with an air purifying box.

9. The gas leakage preventing structure of a gas supply cabinet according to claim 4, wherein The inner sleeve (18) is provided with a sealing ring (21) at an end thereof facing the first air inlet hole (10), and the sealing ring (21) is provided with a fifth air inlet hole (22) matched with the third air inlet hole (19).

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