CN210599310U - Dual-purpose inflator with pressure increasing and reducing functions - Google Patents
Dual-purpose inflator with pressure increasing and reducing functions Download PDFInfo
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- CN210599310U CN210599310U CN201921594830.6U CN201921594830U CN210599310U CN 210599310 U CN210599310 U CN 210599310U CN 201921594830 U CN201921594830 U CN 201921594830U CN 210599310 U CN210599310 U CN 210599310U
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Abstract
The utility model discloses a dual-purpose inflator of pressurization and depressurization, include: a piston is arranged in the cylinder barrel, and the cylinder barrel is connected with an air tap; the check valve assembly is arranged in the cylinder barrel and divides the cylinder barrel into a first cavity and a second cavity, the piston is positioned in the first cavity, the air tap is connected with the second cavity, and the check valve assembly comprises an air inlet check valve and an air outlet check valve; the air guide device is arranged in the second cavity and comprises a first air chamber and a second air chamber, the first air chamber is connected with the exhaust one-way valve in a sealing mode, and the second air chamber is connected with the air inlet one-way valve in a sealing mode; the reversing valve assembly is arranged in the second cavity and used for enabling one air chamber of the first air chamber and the second air chamber to be communicated with the air faucet and enabling the other air chamber of the first air chamber and the second air chamber to be communicated with the outside air. The portable water heater is simple in structure, convenient to carry and maintain and low in cost.
Description
Technical Field
The utility model belongs to real test equipment field, more specifically relates to a dual-purpose inflator of pressurization decompression for laboratory.
Background
Experiments in laboratories such as analysis, chemistry, biology and the like often require operations such as negative pressure suction filtration, solution filtration and the like. Conventional operation needs to adopt the aspiration pump to go on, but uses the aspiration pump to take place phenomenon such as suck-back very easily in the experimentation and arouse the instrument trouble, delays work, and the aspiration pump cost is higher, the maintenance is more loaded down with trivial details, and the aspiration pump itself is bulky, portable not. Therefore, most laboratories do not have air pumps, and it is difficult to purchase pressurizing and depressurizing equipment due to insufficient expenditure, so that the basic operations such as depressurization, pressurization and the like can be carried out only by pushing and pulling the injector, which is very inconvenient.
Therefore, it is expected to develop a laboratory pressurization and depressurization dual-purpose inflator, which can be used for conventional depressurization, air extraction and pressurization and inflation operations, and has the advantages of simple structure, portability, convenient maintenance and low cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a dual-purpose inflator of pressurization and decompression that can be used to conventional decompression bleed and pressurization inflating operation.
In order to achieve the above object, the present invention provides a dual purpose inflator for pressurization and depressurization, comprising:
the piston is arranged in the cylinder barrel, and the cylinder barrel is connected with an air tap;
the check valve assembly is arranged in the cylinder barrel and divides the cylinder barrel into a first cavity and a second cavity, the piston is positioned in the first cavity, the air tap is connected with the second cavity, the check valve assembly comprises an air inlet check valve and an air outlet check valve, and the piston can discharge air in the first cavity through the air outlet check valve or suck external air into the first cavity through the air inlet check valve;
the air guide device is arranged in the second cavity and comprises a first air chamber and a second air chamber, the first air chamber is connected with the exhaust one-way valve in a sealing mode, and the second air chamber is connected with the air inlet one-way valve in a sealing mode;
and the reversing valve assembly is arranged in the second cavity and is used for enabling one air chamber of the first air chamber and the second air chamber to be communicated with the air faucet and enabling the other air chamber of the first air chamber and the second air chamber to be communicated with external air.
Preferably, the reversing valve assembly comprises a housing, a first reversing valve plate and a second reversing valve plate;
the shell is cylindrical, a first connector to a sixth connector are arranged on the side wall of the shell, the first connector, the second connector and the third connector are respectively connected to the first air chamber, the second air chamber and the air tap, and the fourth connector, the fifth connector and the sixth connector are respectively connected to the first air chamber, the second air chamber and external air;
the first reversing valve plate is cylindrical and is rotatably arranged in the shell, the outer surface of the first reversing valve plate is attached to the inner wall of the shell, and a first notch which is recessed inwards is formed in the outer surface of the first reversing valve plate;
the second reversing valve plate is cylindrical and is rotatably arranged in the shell, the outer surface of the second reversing valve plate is attached to the inner wall of the shell, a second notch which is recessed inwards is formed in the outer surface of the second reversing valve plate, and the second reversing valve plate is fixedly connected to the axial end of the first reversing valve plate through a reversing shaft;
when the reversing shaft rotates to a first position, the first notch of the first reversing valve plate is respectively communicated with the first interface and the third interface and seals the second interface, so that the first air chamber is communicated with the air faucet, meanwhile, the second notch of the second reversing valve plate is respectively communicated with the fifth interface and the sixth interface and seals the fourth interface, so that the second air chamber is communicated with outside air;
when the reversing shaft rotates to the second position, the second notch of the second reversing valve plate is communicated with the fourth interface and the sixth interface respectively and seals the fifth interface, so that the first air chamber is communicated with the external air, meanwhile, the first notch of the first reversing valve plate is communicated with the second interface and the third interface respectively and seals the first interface, and therefore the second air chamber is communicated with the air faucet.
Preferably, the reversing valve assembly further includes a plurality of air pipes, and the air pipes are respectively connected between the first air chamber and the first interface, between the first air chamber and the fourth interface, between the second air chamber and the second interface, between the second air chamber and the fifth interface, and between the air faucet and the third interface.
Preferably, the reversing valve assembly further comprises a valve wrench, an operation hole is formed in the side wall of the cylinder barrel, and one end of the reversing shaft extends out of the operation hole and is connected with the valve wrench.
Preferably, the check valve assembly further comprises a baffle plate, the periphery of the baffle plate is connected with the inner wall of the cylinder barrel in a sealing mode, and a third cavity and a fourth cavity are arranged inside the baffle plate;
the third cavity is communicated with the first cavity through a first through hole and communicated with the second cavity through a second through hole;
the fourth cavity is communicated with the first cavity through a third through hole and communicated with the second cavity through a fourth through hole;
the exhaust check valve is arranged in the third cavity, and the air inlet check valve is arranged in the fourth cavity.
Preferably, the exhaust check valve comprises a first rubber pad and a first convex structure, the first rubber pad covers the first through hole in an openable and closable manner, the first rubber pad can be opened under the action of air flow and closed under the action of negative pressure, the first convex structure blocks the second through hole, a plurality of first ventilation small openings are formed in the side face of the first convex structure, and the first ventilation small openings are communicated with the second cavity.
Preferably, the air inlet check valve comprises a second rubber pad and a second convex structure, the second rubber pad covers the fourth through hole in an openable and closable manner, the second rubber pad can be opened under the action of air flow and closed under the action of negative pressure, the second convex structure blocks the third through hole, a plurality of second air through small openings are formed in the side face of the second convex structure, and the second air through small openings are communicated with the first cavity.
Preferably, the air guide device comprises a bottom plate and a partition plate, the bottom plate is provided with a pair of first air holes and a pair of second air holes, the pair of first air holes and the pair of second air holes are separated by the partition plate, the edge of the bottom plate is hermetically connected with the inner wall of the cylinder barrel so as to form an air chamber between the bottom plate and the baffle plate, and the partition plate divides the air chamber into the first air chamber and the second air chamber;
the exhaust check valve and the pair of first air holes are communicated with the first air chamber, and the intake check valve and the pair of second air holes are communicated with the second air chamber.
Preferably, the device further comprises a push-pull rod and a handle, a sealing rubber strip is arranged on the periphery of the piston, one end of the push-pull rod is connected to the piston, and the other end of the push-pull rod penetrates through an upper cover of the cylinder barrel and is connected to the handle.
Preferably, the check valve further comprises a blocking ring, wherein the blocking ring is arranged in the cylinder barrel and positioned between the piston and the check valve assembly so as to prevent the piston from impacting the check valve assembly.
The beneficial effects of the utility model reside in that:
when the air cylinder is used as a pressurizing air cylinder, the first air chamber is communicated with the air nozzle by using the first reversing valve, and the second air chamber is communicated with the outside air by using the second reversing valve; then connecting the air nozzle to the interface of the object to be pressurized; the piston is pulled to move towards one end far away from the second cavity in the first cavity, so that the external air is filled into the first cavity through the second reversing valve, the second air chamber and the air inlet one-way valve in sequence; and then the piston is pushed to move towards one end close to the second cavity in the first cavity, so that the air in the first cavity is filled into the object to be pressurized sequentially through the exhaust check valve, the first air chamber, the first reversing valve and the air tap. The pressurization can be completed by repeating the steps, and the operation method is simple.
When the air pressure reducing air cylinder is used, the second air chamber is communicated with the air tap by the first reversing valve, and the first air chamber is communicated with the outside air by the second reversing valve; then connecting the air tap to the interface of the object to be decompressed; pulling the piston to enable the piston to move towards one end far away from the second cavity in the first cavity, and enabling the gas in the object to be decompressed to be sequentially filled into the first cavity through the gas nozzle, the first reversing valve, the second gas chamber and the gas inlet one-way valve; and then the piston is pushed to move towards one end close to the second cavity in the first cavity, so that the air in the first cavity is exhausted into the air through the exhaust check valve, the first air chamber and the second reversing valve in sequence. The pressure reduction can be completed by repeating the steps, and the operation method is simple.
The switching of the pressurization and the decompression functions of the air cylinder can be completed by adjusting the reversing valve component, the effects of pressurization and decompression can be realized only by reciprocating motion of the piston in the air cylinder, the operation is simplified, and the device has the advantages of simple structure, convenient maintenance, portability and low cost.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
Fig. 1 is a schematic exploded view showing a pressure/pressure reducing dual-purpose gas cylinder according to an embodiment of the present invention.
Fig. 2 is a schematic view showing an external structure of a pressurizing and depressurizing dual-purpose gas cylinder according to an embodiment of the present invention.
Fig. 3 is an exploded view of a directional control valve of a dual purpose gas cylinder for pressurizing and depressurizing according to an embodiment of the present invention.
Fig. 4 shows a schematic view of the air intake state of a one-way valve assembly according to an embodiment of the present invention.
Fig. 5 shows a schematic view of the venting state of a one-way valve assembly according to an embodiment of the present invention.
Description of the reference numerals
1. A cylinder barrel; 2. an upper cover; 3. a handle; 4. a push-pull rod; 5. a piston; 6. sealing the rubber strip; 7. a blocking ring; 8. a one-way valve assembly; 9. an air guide device; 10. an air tube; 11. a housing; 12. a first reversing valve plate; 13. a reversing shaft; 14. a valve wrench; 15. an air tap; 16. a second reversing valve plate; 17. a baffle plate; 18. a third cavity; 19. a fourth cavity; 20. a first rubber pad; 21. a first convex structure; 22. a second rubber pad; 23. a second convex structure; 24. a first through hole; 25. a second through hole; 26. a third through hole; 27. a fourth via hole; 28. a circular separator plate; 29. and (4) end covers.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
According to the utility model discloses a dual-purpose inflator of pressurization and depressurization, include:
the piston is arranged in the cylinder barrel, and the cylinder barrel is connected with an air tap;
the check valve assembly is arranged in the cylinder barrel and divides the cylinder barrel into a first cavity and a second cavity, the piston is positioned in the first cavity, the air tap is connected with the second cavity, the check valve assembly comprises an air inlet check valve and an air outlet check valve, and the piston can discharge air in the first cavity through the air outlet check valve or suck external air into the first cavity through the air inlet check valve;
the air guide device is arranged in the second cavity and comprises a first air chamber and a second air chamber, the first air chamber is connected with the exhaust one-way valve in a sealing mode, and the second air chamber is connected with the air inlet one-way valve in a sealing mode;
and the reversing valve assembly is arranged in the second cavity and is used for enabling one air chamber of the first air chamber and the second air chamber to be communicated with the air faucet and enabling the other air chamber of the first air chamber and the second air chamber to be communicated with the outside air.
When the air cylinder is used as a pressurizing air cylinder, the first air chamber is communicated with the air nozzle by using the first reversing valve, and the second air chamber is communicated with the outside air by using the second reversing valve; then connecting the air nozzle to the interface of the object to be pressurized; the piston is pulled to move towards one end far away from the second cavity in the first cavity, so that the external air is filled into the first cavity through the second reversing valve, the second air chamber and the air inlet one-way valve in sequence; and then the piston is pushed to move towards one end close to the second cavity in the first cavity, so that the air in the first cavity is filled into the object to be pressurized sequentially through the exhaust check valve, the first air chamber, the first reversing valve and the air tap. The pressurization can be completed by repeating the steps, and the operation method is simple.
When the air pressure reducing air cylinder is used, the second air chamber is communicated with the air tap by the first reversing valve, and the first air chamber is communicated with the outside air by the second reversing valve; then connecting the air tap to the interface of the object to be decompressed; pulling the piston to enable the piston to move towards one end far away from the second cavity in the first cavity, and enabling the gas in the object to be decompressed to be sequentially filled into the first cavity through the gas nozzle, the first reversing valve, the second gas chamber and the gas inlet one-way valve; and then the piston is pushed to move towards one end close to the second cavity in the first cavity, so that the air in the first cavity is exhausted into the air through the exhaust check valve, the first air chamber and the second reversing valve in sequence. The pressure reduction can be completed by repeating the steps, and the operation method is simple.
The switching of the pressurization and the decompression functions of the air cylinder can be completed by adjusting the reversing valve component, the effects of pressurization and decompression can be realized only by reciprocating motion of the piston in the air cylinder, the operation is simplified, and the device has the advantages of simple structure, convenient maintenance, portability and low cost.
Preferably, the reversing valve assembly comprises a shell, a first reversing valve plate and a second reversing valve plate;
the shell is cylindrical, a first connector to a sixth connector are arranged on the side wall, wherein the first connector, the second connector and the third connector are respectively connected to the first air chamber, the second air chamber and the air tap, and the fourth connector, the fifth connector and the sixth connector are respectively connected to the first air chamber, the second air chamber and the external air;
the first reversing valve plate is cylindrical and is rotatably arranged in the shell, the outer surface of the first reversing valve plate is attached to the inner wall of the shell, and a first notch which is recessed inwards is formed in the outer surface of the first reversing valve plate;
the second reversing valve plate is cylindrical and is rotatably arranged in the shell, the outer surface of the second reversing valve plate is attached to the inner wall of the shell, a second notch which is recessed inwards is formed in the outer surface of the second reversing valve plate, and the second reversing valve plate is fixedly connected to the axial end part of the first reversing valve plate through a reversing shaft;
when the reversing shaft rotates to the first position, the first notch of the first reversing valve plate is communicated with the first connector and the third connector respectively and seals the second connector, so that the first air chamber is communicated with the air tap, and meanwhile, the second notch of the second reversing valve plate is communicated with the fifth connector and the sixth connector respectively and seals the fourth connector, so that the second air chamber is communicated with the outside air;
when the reversing shaft rotates to the second position, the second notch of the second reversing valve plate is communicated with the fourth interface and the sixth interface respectively and seals the fifth interface, so that the first air chamber is communicated with the outside air, and meanwhile, the first notch of the first reversing valve plate is communicated with the second interface and the third interface respectively and seals the first interface, so that the second air chamber is communicated with the air faucet.
Specifically, the first interface, the second interface and the third interface are positioned on the same circumference of the shell, a connecting line of the first interface and the second interface passes through the circle center of the circumference, and the third interface is positioned on a perpendicular bisector of the connecting line of the first interface and the second interface; the fifth interface and the sixth interface are positioned on the other circumference of the shell, a connecting line of the fourth interface and the fifth interface passes through the circle center of the circumference, and the sixth interface is positioned on a perpendicular bisector of the connecting line of the fourth interface and the fifth interface; the first interface and the fifth interface are arranged in a line along the axis direction, the second interface and the fourth interface are arranged in a line along the axis direction, and the third interface and the sixth interface are arranged in a line along the axis direction; the angle between the first position and the second position of the reversing shaft is 90 deg..
When the reversing shaft is positioned at the first position, the reversing shaft is a pressurizing air cylinder; the reversing shaft is rotated by 90 degrees to be switched into a decompression air cylinder.
Preferably, the reversing valve assembly further comprises a plurality of air pipes, and the air pipes are respectively connected between the first air chamber and the first connector, between the first air chamber and the fourth connector, between the second air chamber and the second connector, between the second air chamber and the fifth connector, and between the air nozzle and the third connector.
As the preferred scheme, the reversing valve component also comprises a valve wrench, the side wall of the cylinder barrel is provided with an operation hole, and one end of the reversing shaft extends out of the operation hole and is connected with the valve wrench, so that the reversing shaft can be rotated manually.
As a preferred scheme, the check valve assembly further comprises a baffle plate, the periphery of the baffle plate is hermetically connected with the inner wall of the cylinder barrel, and a third cavity and a fourth cavity are arranged inside the baffle plate;
the third cavity is communicated with the first cavity through the first through hole and communicated with the second cavity through the second through hole;
the fourth cavity is communicated with the first cavity through the third through hole and communicated with the second cavity through the fourth through hole;
the exhaust one-way valve is arranged in the third cavity, and the air inlet one-way valve is arranged in the fourth cavity.
According to the preferable scheme, the exhaust check valve comprises a first rubber pad and a first convex structure, the first rubber pad covers the first through hole in an openable and closable manner, the first rubber pad can be opened under the action of air flow and closed under the action of negative pressure, the first convex structure blocks the second through hole, a plurality of first ventilation small openings are formed in the side face of the first convex structure, and the first ventilation small openings are communicated with the second cavity.
According to the preferable scheme, the air inlet check valve comprises a second rubber pad and a second convex structure, the second rubber pad covers the fourth through hole in an openable and closable manner, the second rubber pad can be opened under the action of air flow and closed under the action of negative pressure, the second convex structure blocks the third through hole, a plurality of second air through small openings are formed in the side face of the second convex structure, and the second air through small openings are communicated with the first cavity.
Preferably, the air guide device comprises a bottom plate and a partition plate, the bottom plate is provided with a pair of first air holes and a pair of second air holes, the pair of first air holes and the pair of second air holes are separated by the partition plate, the edge of the bottom plate is hermetically connected with the inner wall of the cylinder barrel so as to form an air chamber between the bottom plate and the baffle plate, and the partition plate divides the air chamber into a first air chamber and a second air chamber;
the exhaust check valve and the pair of first air holes are communicated with the first air chamber, and the intake check valve and the pair of second air holes are communicated with the second air chamber.
Preferably, the device further comprises a push-pull rod and a handle, wherein a sealing rubber strip is arranged on the periphery of the piston, one end of the push-pull rod is connected to the piston, and the other end of the push-pull rod penetrates through an upper cover of the cylinder barrel and is connected to the handle.
Specifically, the upper cover is connected with the cylinder barrel through threads.
Preferably, the check valve further comprises a blocking ring, wherein the blocking ring is arranged in the cylinder barrel and is positioned between the piston and the check valve assembly so as to prevent the piston from impacting the check valve assembly.
Examples
Fig. 1 is an exploded view showing a structure of a pressurizing and depressurizing dual-purpose gas cylinder according to the present embodiment; fig. 2 is a schematic view showing an external structure of the pressurizing and depressurizing dual use gas cylinder according to the present embodiment; fig. 3 is an exploded view showing a structure of a directional control valve of the pressurizing and depressurizing dual gas cylinder according to the present embodiment; FIG. 4 is a schematic view showing an air intake state of the check valve assembly according to the present embodiment; FIG. 5 shows a schematic view of the venting state of the one-way valve assembly according to the present invention.
As shown in fig. 1 to 5, the pressurizing and depressurizing dual-purpose gas cylinder includes:
the piston 5 is arranged in the cylinder barrel 1, a sealing rubber strip 6 is arranged on the side wall, in contact with the inner wall of the cylinder barrel 1, of the piston 5, one end of a push-pull rod 4 is connected to the piston 5, the other end of the push-pull rod passes through the upper cover 2 of the cylinder barrel 1 and is connected to a handle 3, and the piston 5 can be driven to reciprocate in the cylinder barrel 1 through the handle 3 and the push-pull rod 4.
The check valve assembly 8 comprises a baffle 17, the baffle 17 is arranged in the cylinder barrel 1, the periphery of the baffle 17 is hermetically connected with the inner wall of the cylinder barrel 1 to divide the cylinder barrel 1 into a first cavity and a second cavity, the piston 5 is positioned in the first cavity, the air nozzle 15 is connected to the second cavity, a third cavity 18 and a fourth cavity 19 are arranged in the baffle 17, the third cavity 18 is communicated with the first cavity through a first through hole 24 and is communicated with the second cavity through a second through hole 25; the fourth cavity 19 is communicated with the first cavity through a third through hole 26 and communicated with the second cavity through a fourth through hole 27; the exhaust check valve is arranged in the third cavity 18, the air inlet check valve is arranged in the fourth cavity 19, the stop ring 7 is arranged between the piston 5 and the baffle 17 to prevent the piston 5 from impacting the check valve assembly 8, and the handle 3 and the push-pull rod 4 drive the piston 5 to reciprocate in the first cavity so as to discharge air in the first cavity through the exhaust check valve or suck external air into the first cavity through the air inlet check valve; the exhaust check valve comprises a first rubber pad 20 and a first convex structure 21, the first rubber pad 20 can be covered on the first through hole 24 in an openable and closable manner, can be opened under the action of air flow and can be closed under the action of negative pressure, the first convex structure 21 blocks the second through hole 25, a plurality of first ventilation small openings are formed in the side surface of the first convex structure 21, and the first ventilation small openings are communicated with the second cavity; the air inlet check valve comprises a second rubber pad 22 and a second convex structure 23, the second rubber pad 22 can be covered on a fourth through hole 27 in an openable and closable manner and can be opened under the action of air flow and closed under the action of negative pressure, the second convex structure 23 blocks the third through hole 26, a plurality of second air through small openings are formed in the side face of the second convex structure 23, and the second air through small openings are communicated with the first cavity.
The air guide device 9 comprises a bottom plate and a partition plate, wherein the bottom plate is provided with a pair of first air holes and a pair of second air holes, the pair of first air holes and the pair of second air holes are separated by the partition plate, the edge of the bottom plate is hermetically connected with the inner wall of the cylinder barrel so as to form an air chamber between the bottom plate and the baffle plate, and the partition plate divides the air chamber into a first air chamber and a second air chamber; the exhaust check valve and the pair of first air holes are communicated with the first air chamber, and the intake check valve and the pair of second air holes are communicated with the second air chamber.
The reversing valve assembly comprises a cylindrical shell 11, a cylindrical first reversing valve plate 12 and a cylindrical second reversing valve plate 16, wherein a circular partition plate 28 is arranged inside the shell 11, the circular partition plate 28 divides the inside of the shell 11 into two parts, and a first interface to a sixth interface are arranged on the side wall of the shell 11, wherein the first interface, the second interface and the third interface are positioned on one side of the circular partition plate 28 and are respectively connected to a first air chamber, a second air chamber and an air nozzle 15, the fourth interface, the fifth interface and the sixth interface are positioned on the other side of the circular partition plate 28 and are respectively connected to the first air chamber, the second air chamber and external air, and 29 is an end cover at two ends of the shell 11;
the first reversing valve plate 12 and the second reversing valve plate 16 are coaxially and rotatably arranged in the shell 11 and are respectively positioned at two sides of the circular partition plate 28, the outer surfaces of the first reversing valve plate 12 and the second reversing valve plate 16 are attached to the inner wall of the shell 11, a first notch which is recessed inwards is formed in the outer surface of the first reversing valve plate 12, a second notch which is recessed inwards is formed in the outer surface of the second reversing valve plate 16, and the reversing shaft 13 penetrates through the circular partition plate 28 along the axial direction to be fixedly connected to the first reversing valve plate 12 and the second reversing valve plate 16 and extends out of the shell 11 to be connected to the valve;
when the reversing shaft 13 rotates to the first position, the first notch of the first reversing valve plate 12 is respectively communicated with the first interface and the third interface and closes the second interface, so that the first air chamber is communicated with the air tap 15, and meanwhile, the second notch of the second reversing valve plate 16 is respectively communicated with the fifth interface and the sixth interface and closes the fourth interface, so that the second air chamber is communicated with the outside air; when the reversing shaft 13 rotates to the second position, the second notch of the second reversing valve plate 16 is respectively communicated with the fourth interface and the sixth interface and closes the fifth interface, so that the first air chamber is communicated with the outside air, and meanwhile, the first notch of the first reversing valve plate 12 is respectively communicated with the second interface and the third interface and closes the first interface, so that the second air chamber is communicated with the air faucet 15;
the first interface, the second interface and the third interface are positioned on the same circumference of the shell 11, a connecting line of the first interface and the second interface passes through the circle center of the circumference, and the third interface is positioned on a perpendicular bisector of the connecting line of the first interface and the second interface; the fifth interface and the sixth interface are positioned on the other circumference of the shell 11, a connecting line of the fourth interface and the fifth interface passes through the circle center of the circumference, and the sixth interface is positioned on a perpendicular bisector of the connecting line of the fourth interface and the fifth interface; the first interface and the fifth interface are arranged in a line along the axis direction, the second interface and the fourth interface are arranged in a line along the axis direction, and the third interface and the sixth interface are arranged in a line along the axis direction; therefore, the included angle between the first position and the second position of the reversing shaft 13 is 90 degrees, when the reversing shaft 13 is positioned at the first position, the reversing shaft 13 is a pressurizing air cylinder, and the reversing shaft 13 can be switched to a depressurizing air cylinder by rotating 90 degrees.
When the air cylinder is used as a pressurizing air cylinder, the first air chamber is communicated with the air nozzle by using the first reversing valve, and the second air chamber is communicated with the outside air by using the second reversing valve; then connecting the air nozzle to the interface of the object to be pressurized; the piston is pulled to move towards one end far away from the second cavity in the first cavity, so that the external air is filled into the first cavity through the second reversing valve, the second air chamber and the air inlet one-way valve in sequence; and then the piston is pushed to move towards one end close to the second cavity in the first cavity, so that the air in the first cavity is filled into the object to be pressurized sequentially through the exhaust check valve, the first air chamber, the first reversing valve and the air tap. The pressurization can be completed by repeating the steps, and the operation method is simple.
When the air pressure reducing air cylinder is used, the second air chamber is communicated with the air tap by the first reversing valve, and the first air chamber is communicated with the outside air by the second reversing valve; then connecting the air tap to the interface of the object to be decompressed; pulling the piston to enable the piston to move towards one end far away from the second cavity in the first cavity, and enabling the gas in the object to be decompressed to be sequentially filled into the first cavity through the gas nozzle, the first reversing valve, the second gas chamber and the gas inlet one-way valve; and then the piston is pushed to move towards one end close to the second cavity in the first cavity, so that the air in the first cavity is exhausted into the air through the exhaust check valve, the first air chamber and the second reversing valve in sequence. The pressure reduction can be completed by repeating the steps, and the operation method is simple.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A dual-purpose gas cylinder for pressurization and depressurization, comprising:
the piston is arranged in the cylinder barrel, and the cylinder barrel is connected with an air tap;
the check valve assembly is arranged in the cylinder barrel and divides the cylinder barrel into a first cavity and a second cavity, the piston is positioned in the first cavity, the air tap is connected with the second cavity, the check valve assembly comprises an air inlet check valve and an air outlet check valve, and the piston can discharge air in the first cavity through the air outlet check valve or suck external air into the first cavity through the air inlet check valve;
the air guide device is arranged in the second cavity and comprises a first air chamber and a second air chamber, the first air chamber is connected with the exhaust one-way valve in a sealing mode, and the second air chamber is connected with the air inlet one-way valve in a sealing mode;
and the reversing valve assembly is arranged in the second cavity and is used for enabling one air chamber of the first air chamber and the second air chamber to be communicated with the air faucet and enabling the other air chamber of the first air chamber and the second air chamber to be communicated with external air.
2. The dual purpose gas cylinder for pressurization and depressurization as claimed in claim 1, wherein a vent hole communicating with the outside air is provided on a side wall of said second chamber; the reversing valve assembly comprises a shell, a first reversing valve plate and a second reversing valve plate;
the shell is cylindrical, a first connector to a sixth connector are arranged on the side wall of the shell, the first connector, the second connector and the third connector are respectively connected to the first air chamber, the second air chamber and the air tap, and the fourth connector, the fifth connector and the sixth connector are respectively connected to the first air chamber, the second air chamber and the air vent;
the first reversing valve plate is cylindrical and is rotatably arranged in the shell, the outer surface of the first reversing valve plate is attached to the inner wall of the shell, and a first notch which is recessed inwards is formed in the outer surface of the first reversing valve plate;
the second reversing valve plate is cylindrical and is rotatably arranged in the shell, the outer surface of the second reversing valve plate is attached to the inner wall of the shell, a second notch which is recessed inwards is formed in the outer surface of the second reversing valve plate, and the second reversing valve plate is fixedly connected to the axial end of the first reversing valve plate through a reversing shaft;
when the reversing shaft rotates to a first position, the first notch of the first reversing valve plate is respectively communicated with the first interface and the third interface and closes the second interface, so that the first air chamber is communicated with the air faucet, meanwhile, the second notch of the second reversing valve plate is respectively communicated with the fifth interface and the sixth interface and closes the fourth interface, so that the second air chamber is communicated with the air vent;
when the reversing shaft rotates to the second position, the second notch of the second reversing valve plate is communicated with the fourth interface and the sixth interface respectively and seals the fifth interface, so that the first air chamber is communicated with the vent, meanwhile, the first notch of the first reversing valve plate is communicated with the second interface and the third interface respectively and seals the first interface, and therefore the second air chamber is communicated with the air faucet.
3. The dual purpose gas cylinder according to claim 2, wherein said reversing valve assembly further comprises first to sixth gas tubes connected between said first gas chamber and said first port, between said first gas chamber and said fourth port, between said second gas chamber and said second port, between said second gas chamber and said fifth port, between said gas nipple and said third port, and between said gas vent and said sixth port, respectively.
4. The dual purpose gas cylinder of claim 3, wherein said reversing valve assembly further comprises a valve wrench, and the side wall of said cylinder barrel is provided with an operation hole, and one end of said reversing shaft extends out of said operation hole and is connected to said valve wrench.
5. The dual purpose gas cylinder for pressurization and depressurization as claimed in claim 1, wherein the check valve assembly further comprises a baffle plate, the periphery of the baffle plate is connected with the inner wall of the cylinder tube in a sealing manner, and a third cavity and a fourth cavity are arranged inside the baffle plate;
the third cavity is communicated with the first cavity through a first through hole and communicated with the second cavity through a second through hole;
the fourth cavity is communicated with the first cavity through a third through hole and communicated with the second cavity through a fourth through hole;
the exhaust check valve is arranged in the third cavity, and the air inlet check valve is arranged in the fourth cavity.
6. The dual-purpose gas cylinder for pressurization and depressurization as claimed in claim 5, wherein the exhaust check valve comprises a first rubber gasket openably and closably covering the first through hole and capable of opening under the action of gas flow and closing under the action of negative pressure, and a first convex structure blocking the second through hole, wherein the first convex structure is provided with a plurality of first vent small openings on the side surface, and the plurality of first vent small openings are communicated with the second cavity.
7. The dual-purpose gas cylinder for pressurization and depressurization as claimed in claim 5, wherein the gas inlet check valve comprises a second rubber gasket and a second convex structure, the second rubber gasket can be covered on the fourth through hole in an openable and closable manner, can be opened under the action of gas flow and can be closed under the action of negative pressure, the second convex structure blocks the third through hole, a plurality of second small vent openings are formed in the side surface of the second convex structure, and the second small vent openings are communicated with the first cavity.
8. The dual purpose gas cylinder for pressurization and depressurization as claimed in claim 5, wherein said gas guide means comprises a bottom plate and a partition plate, said bottom plate being provided with a pair of first gas holes and a pair of second gas holes, said pair of first gas holes and said pair of second gas holes being partitioned by said partition plate, an edge of said bottom plate being sealingly connected to an inner wall of said cylinder tube to form a gas chamber between said bottom plate and said baffle plate, said partition plate partitioning said gas chamber into said first gas chamber and said second gas chamber;
the exhaust check valve and the pair of first air holes are communicated with the first air chamber, and the intake check valve and the pair of second air holes are communicated with the second air chamber.
9. The dual purpose gas cylinder for pressurization and depressurization as claimed in claim 1, further comprising a push-pull rod and a handle, wherein the piston is provided with a sealing rubber strip on the outer periphery thereof, and one end of the push-pull rod is connected to the piston and the other end thereof is connected to the handle through an upper cover of the cylinder barrel.
10. The dual purpose gas cylinder of claim 1 further comprising a stop ring disposed within said cylinder barrel between said piston and said check valve assembly to prevent said piston from impacting said check valve assembly.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921594830.6U CN210599310U (en) | 2019-09-24 | 2019-09-24 | Dual-purpose inflator with pressure increasing and reducing functions |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921594830.6U CN210599310U (en) | 2019-09-24 | 2019-09-24 | Dual-purpose inflator with pressure increasing and reducing functions |
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| CN210599310U true CN210599310U (en) | 2020-05-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529358A (en) * | 2019-09-24 | 2019-12-03 | 天津一安生物技术有限公司 | Pressurize decompression two-purpose inflator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529358A (en) * | 2019-09-24 | 2019-12-03 | 天津一安生物技术有限公司 | Pressurize decompression two-purpose inflator |
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