Gas cylinder air tightness test tool

Abstract

The invention discloses a gas cylinder air tightness test tool, comprising a gas cylinder body, a base, a mounting sleeve, an air pumping device, a first detection cylinder and a second detection cylinder, wherein the first detection cylinder and the second detection cylinder are connected by a connecting pipe and both contain mercury, and the air pumping device comprises a pump cylinder, a piston and a motor. The invention has the beneficial effect that, when in use, the bottom of the gas cylinder body is connected to the mounting sleeve, and air is pumped through the air pumping device, so that the air pressure in the gas cylinder is reduced, thereby causing a liquid level difference between the mercury in the first detection cylinder and the second detection cylinder. After standing for a period of time, if the liquid level difference changes, it indicates that there is a gas leakage in the gas cylinder body. Otherwise, the gas tightness of the gas cylinder body is good, and the gas tightness test of the entire gas cylinder can be performed to improve efficiency. At the same time, whether the gas cylinder body is leaking can be intuitively judged by whether the liquid level difference changes, and the judgment is accurate.

Description

Technical Field

[0001] The invention relates to the technical field of gas cylinder production auxiliary devices, and in particular to a gas cylinder air tightness test tool. Background Art

[0002] Gas cylinders are pressure-bearing equipment with explosion hazards. The medium they contain is generally flammable, explosive, toxic, and highly corrosive. The use environment is more complex and harsh than other pressure vessels due to the characteristics of mobility, repeated filling, unstable operators, and changing use environment. Once a gas cylinder explodes or leaks, it often causes fire or poisoning, or even catastrophic accidents, resulting in serious property losses, casualties, and environmental pollution.

[0003] After the gas cylinder is produced, it needs to be checked for air tightness.

[0004] The Chinese patent with patent application number: CN201520408018.5 discloses a gas cylinder air tightness test tool, in which a vent hole is provided at the center of the sealing head, and a sealing rubber pad is connected to one end of the sealing head by a screw, the diameter of the sealing rubber pad is larger than the diameter of the sealing head, the screw is hollow, the screw and the vent hole are connected, and a trachea connector is provided at the other end of the sealing head. Through the above arrangement, the utility model is used to perform air tightness test on the bottom center of the rolling and sealing gas cylinder tank body, with good sealing effect, no air leakage when pressurized, and improved production efficiency. The utility model has a long service life and reduces production costs.

[0005] Although the above patent can realize the air tightness detection of gas cylinders, during use, the air tightness check of gas cylinders can only be carried out point by point, and each gas cylinder needs to be tested repeatedly, which makes the detection test efficiency low. In addition, during the test, it is not possible to visually observe whether the gas cylinder is leaking, and the effect of the detection test is not good. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a gas cylinder air tightness test tool, and the present invention is achieved through the following technical solutions.

[0007] A gas cylinder air tightness test tool, comprising a gas cylinder body, a hemispherical connecting part fixedly connected to the bottom of the gas cylinder body, a tube body fixedly connected to the bottom of the connecting part, and a base, a mounting sleeve, an air extraction device, a first detection tube and a second detection tube; a gantry is fixedly connected to the upper surface of the base, a plug sleeve is fixedly connected to the center of the top plate of the gantry, the inner diameter of the plug sleeve is equal to the outer diameter of the gas cylinder body, the mounting sleeve is fixedly connected to the upper surface of the base and is located directly below the plug sleeve, a mounting plate is arranged in the mounting sleeve, and a rubber is fixedly connected to the center of the upper surface of the mounting plate in an embedded manner A sealing sleeve of material, the inner diameter of the sealing sleeve is equal to the outer diameter of the tube body, a transfer bin is fixedly connected to the lower surface of the base, the transfer bin and the center of the sealing sleeve are communicated through a connecting pipe, the exhaust device is connected to the left side of the transfer bin, the first detection cylinder and the second detection cylinder are fixedly connected to the base on the right side of the gantry, the bottoms of the first detection cylinder and the second detection cylinder are connected through a connecting pipe, the upper left part of the first detection cylinder is connected to the right side of the transfer bin through an air suction pipe, a first through hole is opened on the top of the second detection cylinder, and mercury is contained in the first detection cylinder and the second detection cylinder.

[0008] Furthermore, the vacuum device includes a pump barrel, a piston and a motor; the pump barrel is fixedly connected to the outer wall of the left side plate of the gantry, a second through hole is opened in the upper left part of the pump barrel, an exhaust pipe is fixedly connected to the lower left part of the pump barrel, a first one-way valve is arranged in the exhaust pipe, the direction in which the first one-way valve allows the fluid to pass is away from the inner cavity of the pump barrel, the lower right part of the pump barrel is connected to the left side of the transfer bin through the vacuum pipe, a second one-way valve is arranged in the vacuum pipe, the direction in which the second one-way valve allows the gas to pass is from the transfer bin to the pump barrel, a reciprocating screw is rotatably connected in the pump barrel, the piston is seal-slidingly connected in the pump barrel, the piston is meshed with the reciprocating screw, the motor is fixedly connected to the left side of the gantry, and the motor is used to drive the reciprocating screw to rotate.

[0009] Furthermore, the reciprocating screw rod is fixedly provided with a first rotating shaft and a second rotating shaft at the upper and lower ends thereof respectively, the first rotating shaft is rotationally connected to the top plate of the pump barrel, the top of the first rotating shaft is connected to the bottom of the output shaft of the motor through a coupling, and the second rotating shaft is rotationally connected to the upper surface of the base.

[0010] Furthermore, the motor is powered by external mains electricity and is provided with a switch for controlling its start and stop, and the switch is fixedly connected to the gantry.

[0011] Furthermore, an anastomotic seat is fixedly connected inside the installation sleeve, and a silicone sleeve is fixedly connected inside the anastomotic seat, and the shape of the silicone sleeve is adapted to the shape of the connecting portion.

[0012] Furthermore, the mounting plate is sealingly and slidingly connected in the mounting sleeve, a telescopic rod is evenly fixedly connected to the circumference between the lower surface of the mounting plate and the upper surface of the base, a spring is provided on the outer sleeve of the telescopic rod, the connecting tube is a threaded telescopic tube, a mounting ring is fixedly connected in the mounting sleeve between the mounting plate and the anastomotic seat, an annular airbag is fixedly connected to the inner ring of the mounting ring, and grooves are evenly opened in the mounting ring along its radial direction, each groove is connected to the mounting sleeve below the mounting plate through a flow tube, and the mounting sleeve below the mounting plate is filled with expansion fluid.

[0013] Furthermore, observation windows made of transparent material are fixedly connected to the front side plates of the first detection cylinder and the second detection cylinder, and scale lines are arranged on each observation window.

[0014] Furthermore, a floating seat is sealingly and slidably connected in the first detection cylinder, and a limit frame is fixedly connected in the first detection cylinder above the floating seat. The limit frame is located below the connection position between the suction pipe and the first detection cylinder.

[0015] The beneficial effect of the present invention is that when in use, the bottom of the gas cylinder body is connected to the mounting sleeve, and air is pumped through the air pumping device, thereby reducing the gas pressure in the gas cylinder, thereby causing a liquid level difference between the mercury in the first detection tube and the second detection tube. After standing for a period of time, if the liquid level difference changes, it means that there is a gas leakage in the gas cylinder body. On the contrary, the gas tightness of the gas cylinder body is good, and the gas tightness test of the entire gas cylinder can be carried out to improve efficiency. At the same time, whether the gas cylinder body is leaking can be intuitively judged by whether the liquid level difference changes, and the judgment is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 : A structural schematic diagram of a gas cylinder air tightness test tooling according to the present invention;

[0018] Figure 2 : Figure 1 A partial enlarged view of point A shown;

[0019] Figure 3 : Figure 1 A partial enlarged view of point B shown;

[0020] Figure 4 : A schematic structural diagram of the anastomotic seat of the present invention;

[0021] Figure 5: Schematic diagram of the structure of the first detection cylinder and the second detection cylinder of the present invention

[0022] Figure 6 : Schematic diagram of the internal structure of the first detection cylinder of the present invention.

[0023] The reference numerals are as follows:

[0024] 1-gas cylinder body, 11-connecting part, 12-tube body, 2-base, 21-gantry, 22-sleeve, 3-installation sleeve, 31-installation plate, 32-sealing sleeve, 33-transfer bin, 34-connecting pipe, 35-anastomosis seat, 36-silicone sleeve, 37-telescopic rod, 38-spring, 39-installation ring, 310-airbag, 311-trough body, 312-flow tube, 313-expansion liquid, 41-pump barrel, 42-piston, 43-motor, 44-second through hole, 45-exhaust pipe, 46-first one-way valve, 47-exhaust pipe, 48-second one-way valve, 49-reciprocating screw, 410-first rotating shaft, 411-second rotating shaft, 412-coupling, 413-switch, 5-first detection cylinder, 51-connecting pipe, 52-intake pipe, 53-first through hole, 54-mercury, 55-observation window, 56-scale line, 57-floating seat, 58-limit frame, 6-second detection cylinder. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1-6As shown, a gas cylinder air tightness test tool comprises a gas cylinder body 1, a hemispherical connecting portion 11 is fixedly connected to the bottom of the gas cylinder body 1, a tube body 12 is fixedly connected to the bottom of the connecting portion 11, and also comprises a base 2, a mounting sleeve 3, an air extraction device, a first detection tube 5 and a second detection tube 6; a gantry 21 is fixedly connected to the upper surface of the base 2, a plug sleeve 22 is fixedly connected to the center of the top plate of the gantry 21, the inner diameter of the plug sleeve 22 is equal to the outer diameter of the gas cylinder body 1, the mounting sleeve 3 is fixedly connected to the upper surface of the base 2 and is located directly below the plug sleeve 22, a mounting plate 31 is arranged in the mounting sleeve 3, and a rubber-made sealing material is embedded and fixedly connected to the center of the upper surface of the mounting plate 31 The sealing sleeve 32 has an inner diameter equal to the outer diameter of the tube body 12. A transfer bin 33 is fixedly connected to the lower surface of the base 2. The transfer bin 33 and the center of the sealing sleeve 32 are communicated through a connecting pipe 34. The exhaust device is connected to the left side of the transfer bin 33. The first detection cylinder 5 and the second detection cylinder 6 are fixedly connected to the base 2 on the right side of the gantry 21. The bottoms of the first detection cylinder 5 and the second detection cylinder 6 are connected through a connecting pipe 51. The upper left side of the first detection cylinder 5 is connected to the right side of the transfer bin 33 through an air suction pipe 52. A first through hole 53 is provided on the top of the second detection cylinder 6. Mercury 54 is contained in the first detection cylinder 5 and the second detection cylinder 6.

[0027] Preferably, the vacuum device includes a pump barrel 41, a piston 42 and a motor 43; the pump barrel 41 is fixedly connected to the outer wall of the left side plate of the gantry 21, a second through hole 44 is opened in the upper left part of the pump barrel 41, an exhaust pipe 45 is fixedly connected to the lower left part of the pump barrel 41, a first one-way valve 46 is arranged in the exhaust pipe 45, the first one-way valve 46 allows the fluid to pass in the direction away from the inner cavity of the pump barrel 41, the lower right part of the pump barrel 41 is connected to the left side of the transfer bin 33 through a vacuum pipe 47, a second one-way valve 48 is arranged in the vacuum pipe 47, the second one-way valve 48 allows the gas to pass in the direction from the transfer bin 33 to the pump barrel 41, a reciprocating screw 49 is rotatably connected in the pump barrel 41, the piston 42 is sealingly and slidably connected in the pump barrel 41, the piston 42 is meshed with the reciprocating screw 49, the motor 43 is fixedly connected to the left side of the gantry 21, and the motor 43 is used to drive the reciprocating screw 49 to rotate.

[0028] Preferably, the reciprocating screw 49 is fixedly provided with a first rotating shaft 410 and a second rotating shaft 411 at its upper and lower ends respectively; the first rotating shaft 410 is rotationally connected to the top plate of the pump barrel 41; the top of the first rotating shaft 410 is connected to the bottom of the output shaft of the motor 43 via a coupling 412; and the second rotating shaft 411 is rotationally connected to the upper surface of the base 2.

[0029] Preferably, the motor 43 is powered by external mains electricity and is provided with a switch 413 for controlling the motor 43 to stop and start. The switch 413 is fixedly connected to the gantry 21 .

[0030] Preferably, an anastomotic seat 35 is fixedly connected inside the installation sleeve 3 , and a silicone sleeve 36 is fixedly connected inside the anastomotic seat 35 . The shape of the silicone sleeve 36 is adapted to the shape of the connecting portion 11 .

[0031] Preferably, the mounting plate 31 is sealingly and slidably connected in the mounting sleeve 3, a telescopic rod 37 is evenly fixedly connected to the circumference between the lower surface of the mounting plate 31 and the upper surface of the base 2, a spring 38 is provided on the outer sleeve of the telescopic rod 37, the connecting tube 34 is a threaded telescopic tube, a mounting ring 39 is fixedly connected in the mounting sleeve 3 between the mounting plate 31 and the anastomotic seat 35, an annular airbag 310 is fixedly connected to the inner ring of the mounting ring 39, and grooves 311 are evenly opened in the mounting ring 39 along its radial direction, each groove 311 is connected to the mounting sleeve 3 below the mounting plate 31 through a flow tube 312, and the mounting sleeve 3 below the mounting plate 31 is filled with an expansion liquid 313.

[0032] Preferably, an observation window 55 made of a transparent material is fixedly connected to the front side plates of the first detection tube 5 and the second detection tube 6 , and each observation window 55 is provided with a scale line 56 .

[0033] Preferably, a floating seat 57 is sealingly and slidably connected in the first detection cylinder 5 , and a limit frame 58 is fixedly connected in the first detection cylinder 5 above the floating seat 57 . The limit frame 58 is located below the connection position between the suction pipe 52 and the first detection cylinder 5 .

[0034] A specific embodiment of the present invention is:

[0035] Insert the gas cylinder body 1 upside down into the insertion sleeve 22, the connecting part 11 is located in the anastomotic seat 35 and the silicone sleeve 36, and the tube body 12 is inserted into the sealing sleeve 32. The sealing sleeve 32 realizes a single seal on the tube body 12. The gas cylinder body 1 will drop due to gravity, thereby pushing the mounting plate 31 down. At this time, the telescopic rod 37 is shortened and the spring 38 is compressed. When the mounting plate 31 drops, the expansion liquid 313 will be pushed. The expansion liquid 313 enters the airbag 310 through the flow tube 312 and the groove body 311. The airbag 310 expands to form a double seal on the tube body 12, that is, the gas cylinder body 1 simultaneously realizes a seal on the tube body 12 during the insertion process.

[0036] After the air tightness test is completed, the gas cylinder body 1 is pulled out, and the mounting plate 31 is reset under the action of the spring 38 .

[0037] After the gas cylinder body 1 is inserted, the motor 43 is controlled by the switch 413 to work. When the motor 43 is working, it drives the first rotating shaft 410, the reciprocating screw 49 and the second rotating shaft 411 to rotate synchronously. The reciprocating screw 49 drives the piston 42 to perform reciprocating lifting and lowering motion, thereby extracting the air in the transfer chamber 33. The setting of the second through hole 44 allows the piston 42 to be lifted and lowered smoothly.

[0038] Under the action of the suction pipe 52 and the connecting pipe 34, the pressure in the gas cylinder body 1, the upper part of the first detection cylinder 5 and the transfer chamber 33 is balanced, so that when the air in the transfer chamber 33 is extracted, the air pressure above the first detection cylinder 5 and in the gas cylinder body 1 is reduced.

[0039] At this time, due to the setting of the first through hole 53, the liquid level position of the mercury 54 in the second detection cylinder 6 is subject to the external atmospheric pressure, while the liquid level position pressure of the mercury 54 in the first detection cylinder 5 is relatively small, so that the mercury 54 in the first detection cylinder 5 rises, and the mercury 54 in the second detection cylinder 6 falls, and a liquid level difference is formed between the mercury 54 in the first detection cylinder 5 and the second detection cylinder 6. The difference is read through the scale line 56. After standing for a period of time, if the liquid level difference decreases, it indicates that the gas cylinder body 1 is leaking. If the liquid level difference is not large, the gas cylinder body 1 has good air tightness.

[0040] The arrangement of the floating seat 57 can prevent the mercury 54 from entering the air intake pipe 52 when excessive air is pumped out.

[0041] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A gas cylinder air tightness test tool, comprising a gas cylinder body, a hemispherical connecting portion is fixedly connected to the bottom of the gas cylinder body, a tube body is fixedly connected to the bottom of the connecting portion, and the characteristics are: It also includes a base, a mounting sleeve, an exhaust device, a first detection cylinder and a second detection cylinder; a gantry is fixedly connected to the upper surface of the base, a plug sleeve is fixedly connected to the center of the top plate of the gantry, the inner diameter of the plug sleeve is equal to the outer diameter of the gas cylinder body, the mounting sleeve is fixedly connected to the upper surface of the base and is located directly below the plug sleeve, a mounting plate is arranged in the mounting sleeve, a sealing sleeve of rubber material is embedded and fixedly connected to the center of the upper surface of the mounting plate, the inner diameter of the sealing sleeve is equal to the outer diameter of the tube body, a transfer bin is fixedly connected to the lower surface of the base, the transfer bin and the center of the sealing sleeve are communicated through a connecting pipe, the exhaust device is connected to the left side of the transfer bin, the first detection cylinder and the second detection cylinder are fixedly connected to the base on the right side of the gantry, the bottoms of the first detection cylinder and the second detection cylinder are connected through a connecting pipe, the upper left part of the first detection cylinder is connected to the right side of the transfer bin through an air suction pipe, a first through hole is opened on the top of the second detection cylinder, and mercury is contained in the first detection cylinder and the second detection cylinder; An anastomotic seat is fixedly connected in the mounting sleeve, and a silicone sleeve is fixedly connected in the anastomotic seat, and the shape of the silicone sleeve is adapted to the shape of the connecting part; the mounting plate is sealingly and slidably connected in the mounting sleeve, and a telescopic rod is evenly fixedly connected to the circumference between the lower surface of the mounting plate and the upper surface of the base, and a spring is provided on the outer sleeve of the telescopic rod, and the connecting tube is a threaded telescopic tube, and a mounting ring is fixedly connected in the mounting sleeve between the mounting plate and the anastomotic seat, and an annular airbag is fixedly connected to the inner ring of the mounting ring, and grooves are evenly opened in the mounting ring along its radial direction, and each groove is connected to the mounting sleeve below the mounting plate through a flow tube, and the mounting sleeve below the mounting plate is filled with expansion fluid.

2. A gas cylinder air tightness test tool according to claim 1, characterized in that: The vacuum device includes a pump barrel, a piston and a motor; the pump barrel is fixedly connected to the outer wall of the left side plate of the gantry, a second through hole is opened in the upper left part of the pump barrel, an exhaust pipe is fixedly connected to the lower left part of the pump barrel, a first one-way valve is arranged in the exhaust pipe, the direction in which the first one-way valve allows the fluid to pass is away from the inner cavity of the pump barrel, the lower right part of the pump barrel is connected to the left side of the transfer bin through the vacuum pipe, a second one-way valve is arranged in the vacuum pipe, the direction in which the second one-way valve allows the gas to pass is from the transfer bin to the pump barrel, a reciprocating screw is rotatably connected in the pump barrel, the piston is seal-slidingly connected in the pump barrel, the piston is meshed with the reciprocating screw, the motor is fixedly connected to the left side of the gantry, and the motor is used to drive the reciprocating screw to rotate.

3. A gas cylinder air tightness test tool according to claim 2, characterized in that: The upper and lower ends of the reciprocating screw are respectively fixed with a first rotating shaft and a second rotating shaft. The first rotating shaft is rotatably connected to the top plate of the pump barrel, the top of the first rotating shaft is connected to the bottom of the output shaft of the motor through a coupling, and the second rotating shaft is rotatably connected to the upper surface of the base.

4. A gas cylinder air tightness test tool according to claim 3, characterized in that: The motor is powered by external mains electricity and is provided with a switch for controlling the motor to stop and start. The switch is fixedly connected to the gantry.

5. The gas cylinder air tightness test tool according to claim 1, characterized in that: Observation windows made of transparent material are fixedly connected to the front side plates of the first detection tube and the second detection tube, and scale lines are arranged on each observation window.

6. A gas cylinder air tightness test tool according to claim 5, characterized in that: A floating seat is sealingly and slidably connected in the first detection cylinder, and a limit frame is fixedly connected in the first detection cylinder above the floating seat. The limit frame is located below the connection position between the suction pipe and the first detection cylinder.

Images