Liquid filling multi-stage air cylinder

Abstract

The liquid filling multi-stage air cylinder comprises a first-stage air cylinder assembly and a second-stage air cylinder assembly, wherein the first-stage air cylinder assembly comprises a first-stage cylinder front end cover, a first-stage cylinder barrel, a first-stage cylinder rear end cover and a first-stage cylinder piston; working air ports are formed in the first-stage cylinder front end cover and the first-stage cylinder rear end cover; the second-stage air cylinder assembly comprises a second-stage cylinder front end cover, a second-stage cylinder barrel and a second-stage cylinder piston; the second-stage cylinder front end cover is arranged at the front end of the second-stage cylinder barrel, and the first-stage cylinder piston is arranged at the rear end of the second-stage cylinder barrel; the second-stage cylinder piston is arranged in the second-stage cylinder barrel and is matched with the second-stage cylinder barrel; the piston rod is connected with the second-stage cylinder piston and is hollow; a switch valve is arranged at the front end of the piston rod, a small cylinder is arranged at the rear end of the piston rod, and a valve core of the switch valve is connected with an output end of the small cylinder through a pull rod; two air channels are formed in the pipe wall of the piston rod, and the two air channels are communicated with the front end and the rear end of the second-stage cylinder piston correspondingly and used for controlling the second-stage cylinder piston to move forwards and backwards correspondingly.

Description

Technical Field

[0001] The invention belongs to the field of traditional Chinese medicine liquid filling, and in particular relates to a liquid filling multi-stage cylinder. Background Art

[0002] The upper part of the Chinese medicine liquid storage cylinder is liquid and the lower part is medicine residue. The liquid filling port is at the bottom, and the medicine is also at the bottom. The traditional liquid extraction and filling is extracted from the bottom of the tank. The medicine liquid is mixed with residue and the quality does not meet the requirements. If it is extracted from the top, a water pump must be used. Moreover, it is inconvenient to extract from the top because of the seal on the top of the tank, and it is not conducive to assembly line operation.

[0003] We hope to extract liquid without drug residue on the top of the liquid, so the drug liquid needs to be extracted from top to bottom, avoiding the drug residue. This top-to-bottom movement is similar to a cylinder. How to use the cylinder to extract the drug liquid is a point that needs to be solved at present;

[0004] The current structure of an ordinary single-stage cylinder is: front and rear end covers plus a cylinder barrel, a piston and a piston rod, and the front and rear end covers each have an air port, one air port takes in air while the other one exhausts air, so that the piston moves.

[0005] The structure of an ordinary multi-stage cylinder is: there are multiple cylinder barrels and multiple pistons in one cylinder, the piston and the cylinder barrel are connected as one, the small cylinder barrel is inserted into the large cylinder barrel, and can be extended and retracted one level at a time like an antenna. After air is taken in from the air inlet of the end cover, the cylinder can be extended or retracted one level at a time like an antenna, but it cannot stay at a designated position in the middle.

[0006] In summary, the traditional cylinder cannot achieve individual control of the extension and retraction of each stage, and does not have a channel for extracting the liquid medicine, and cannot be used to extract the liquid medicine from top to bottom. Therefore, it is necessary to design a liquid filling multi-stage cylinder to extract the liquid without drug residue on the top of the storage tube, and to achieve individual control of the extension and retraction of each stage. Summary of the invention

[0007] Purpose of the invention: to provide a liquid filling multi-stage cylinder to solve the above-mentioned problems existing in the prior art.

[0008] Technical solution: A liquid filling multi-stage cylinder, comprising:

[0009] The first-stage cylinder assembly includes a first-stage cylinder front end cover, a first-stage cylinder barrel, a first-stage cylinder rear end cover, and a first-stage cylinder piston;

[0010] The first-stage cylinder front end cover and the first-stage cylinder rear end cover are respectively arranged at two ends of the first-stage cylinder barrel;

[0011] The first-stage cylinder piston is disposed in the first-stage cylinder barrel and is adapted to the first-stage cylinder barrel;

[0012] The front cover of the first-stage cylinder and the rear cover of the first-stage cylinder are both provided with working gas ports;

[0013] A secondary cylinder assembly, including a secondary cylinder front end cover, a secondary cylinder barrel, and a secondary cylinder piston;

[0014] The secondary cylinder is arranged inside the primary cylinder, and the front end cover of the primary cylinder is sleeved on the secondary cylinder;

[0015] The front end cover of the secondary cylinder is arranged at the front end of the secondary cylinder barrel, and the piston of the primary cylinder is arranged at the rear end of the secondary cylinder barrel;

[0016] The secondary cylinder piston is arranged in the secondary cylinder barrel and is adapted to the secondary cylinder barrel, and the front end cover of the secondary cylinder is sleeved on the piston rod;

[0017] The piston rod is connected to the piston of the secondary cylinder and is hollow;

[0018] The piston rod passes through the front end cover of the secondary cylinder, the piston of the primary cylinder, and the rear end cover of the primary cylinder, and liquid can flow in the hollow rod;

[0019] A switch valve is provided at the front end of the piston rod, and a small cylinder for controlling the switch valve is provided at the rear end, and the valve core of the switch valve is connected to the output end of the small cylinder through a pull rod;

[0020] When the cylinder extends, the valve core opens, and when the cylinder retracts, the valve core closes;

[0021] Two air passages are provided on the wall of the piston rod tube, and the two air passages are respectively connected to the front and rear ends of the secondary cylinder piston, and are respectively used to control the forward and backward movement of the secondary cylinder piston.

[0022] The first cylinder piston of the first cylinder assembly is also used as the rear end cover of the second cylinder of the second cylinder assembly, and the second cylinder barrel is also used as the piston rod of the first cylinder assembly;

[0023] The present invention connects the piston rod with the secondary cylinder piston, designs the piston rod to be hollow, designs a switch valve at the end of the piston rod, and drives the pull rod through the small cylinder designed at the other end to open and close the switch valve core, thereby completing the extraction of the liquid medicine.

[0024] A working gas port is provided on the front cover of the first-stage cylinder and the rear cover of the first-stage cylinder to control the movement of the piston of the first-stage cylinder;

[0025] Two air passages are opened on the tube wall of the piston rod, and the two air passages are respectively connected to the front and rear ends of the secondary cylinder piston, and are respectively used to control the forward and backward movement of the secondary cylinder piston, thereby realizing the separate control of the secondary cylinder piston and the primary cylinder piston, and further the separate control of the extension and retraction of the secondary cylinder barrel and the piston rod.

[0026] In a further embodiment, a primary sealing ring is provided between the front end cover of the primary cylinder and the secondary cylinder barrel.

[0027] In a further embodiment, a first sealing ring is provided between the rear end cover of the first-stage cylinder and the piston rod.

[0028] In a further embodiment, a second sealing ring is provided between the front end cover of the secondary cylinder, the piston of the primary cylinder and the piston rod.

[0029] In a further embodiment, piston sealing rings are provided between the primary cylinder piston and the primary cylinder barrel, and between the secondary cylinder piston and the secondary cylinder barrel.

[0030] Beneficial effects: The present invention discloses a multi-stage cylinder for liquid filling. The present invention connects a piston rod with a second-stage cylinder piston, designs the piston rod to be hollow, designs a switch valve at the end of the piston rod, and drives a pull rod through a small cylinder designed at the other end to open and close the valve core of the switch valve, thereby completing the extraction of the liquid medicine.

[0031] A working gas port is provided on the front cover of the first-stage cylinder and the rear cover of the first-stage cylinder to control the movement of the piston of the first-stage cylinder;

[0032] Two air passages are opened on the tube wall of the piston rod, and the two air passages are respectively connected to the front and rear ends of the secondary cylinder piston, and are respectively used to control the forward and backward movement of the secondary cylinder piston, thereby realizing the separate control of the secondary cylinder piston and the primary cylinder piston, and further the separate control of the extension and retraction of the secondary cylinder barrel and the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention.

[0034] The accompanying drawings are marked as follows:

[0035] 11. Front cover of the first-stage cylinder; 12. First-stage cylinder barrel; 13. Rear cover of the first-stage cylinder; 14. Piston of the first-stage cylinder;

[0036] 21. Front end cover of the secondary cylinder; 22. Secondary cylinder barrel; 23. Secondary cylinder piston;

[0037] 31. Piston rod; 32. Airway; 33. Pull rod; 34. Small cylinder; 35. Switch valve. DETAILED DESCRIPTION

[0038] The present application relates to a liquid filling multi-stage cylinder, which is explained in detail below through a specific implementation method.

[0039] A liquid filling multi-stage cylinder, comprising:

[0040] The first-stage cylinder assembly includes a first-stage cylinder front end cover 11, a first-stage cylinder barrel 12, a first-stage cylinder rear end cover 13, and a first-stage cylinder piston 14;

[0041] The first-stage cylinder front end cover 11 and the first-stage cylinder rear end cover 13 are respectively arranged at two ends of the first-stage cylinder barrel 12;

[0042] The primary cylinder piston 14 is disposed in the primary cylinder barrel 12 and is adapted to the primary cylinder barrel 12;

[0043] The front cover 11 of the first cylinder and the rear cover 13 of the first cylinder are both provided with working gas ports;

[0044] The secondary cylinder assembly includes a secondary cylinder front end cover 21, a secondary cylinder barrel 22, and a secondary cylinder piston 23;

[0045] The secondary cylinder barrel 22 is disposed inside the primary cylinder barrel 12, and the primary cylinder front end cover 11 is sleeved on the secondary cylinder barrel 22;

[0046] The front end cover 21 of the secondary cylinder is arranged at the front end of the secondary cylinder barrel 22, and the piston 14 of the primary cylinder is arranged at the rear end of the secondary cylinder barrel 22;

[0047] The secondary cylinder piston 23 is disposed in the secondary cylinder barrel 22 and is adapted to the secondary cylinder barrel 22. The secondary cylinder front end cover 21 is sleeved on the piston rod 31.

[0048] The piston rod 31 is connected to the secondary cylinder piston 23 and is hollow;

[0049] The piston rod 31 passes through the front end cover 21 of the secondary cylinder, the piston 14 of the primary cylinder, and the rear end cover 13 of the primary cylinder, and liquid can flow in the hollow rod;

[0050] A switch valve 35 is provided at the front end of the piston rod 31, and a small cylinder 34 for controlling the switch valve is provided at the rear end. The valve core of the switch valve 35 is connected to the output end of the small cylinder 34 through a pull rod 33;

[0051] When the small cylinder 34 is extended, the valve core is opened, and when the small cylinder 34 is retracted, the valve core is closed;

[0052] Two air passages 32 are provided on the wall of the piston rod 31 , and the two air passages 32 are respectively connected to the front and rear ends of the secondary cylinder piston 23 , and are respectively used to control the forward and backward movement of the secondary cylinder piston 23 .

[0053] The first-stage cylinder piston 14 of the first-stage cylinder assembly is also used as the second-stage cylinder rear end cover of the second-stage cylinder assembly, and the second-stage cylinder barrel 22 is also used as the piston rod 31 of the first-stage cylinder assembly;

[0054] The present invention connects the piston rod 31 with the secondary cylinder piston 23, and designs the piston rod 31 to be hollow. A switch valve 35 is designed at the end of the piston rod 31, and a small cylinder 34 designed at the other end drives the pull rod 33 to open and close the valve core of the switch valve 35, thereby completing the extraction of the liquid medicine.

[0055] A working gas port is provided on the front cover 11 of the first-stage cylinder and the rear cover 13 of the first-stage cylinder to control the movement of the piston 14 of the first-stage cylinder;

[0056] Two air passages 32 are provided on the tube wall of the piston rod 31, and the two air passages 32 are respectively connected to the front and rear ends of the secondary cylinder piston 23, and are respectively used to control the forward and backward movement of the secondary cylinder piston 23, thereby realizing the separate control of the secondary cylinder piston 23 and the primary cylinder piston 14, and further the separate control of the extension and retraction of the secondary cylinder barrel 22 and the piston rod 31.

[0057] A primary sealing ring is provided between the primary cylinder front end cover 11 and the secondary cylinder barrel 22 .

[0058] A first sealing ring is provided between the rear end cover 13 of the first cylinder and the piston rod 31 .

[0059] A second sealing ring is provided between the front end cover 21 of the secondary cylinder, the piston 14 of the primary cylinder and the piston rod 31 .

[0060] Piston sealing rings are provided between the primary cylinder piston 14 and the primary cylinder barrel 12 , and between the secondary cylinder piston 23 and the secondary cylinder barrel 22 .

[0061] Working principle description: When working, the movement of the first-stage cylinder piston 14 is controlled by charging and exhausting the working gas ports on the first-stage cylinder front cover 11 and the first-stage cylinder rear cover 13, thereby driving the first-stage cylinder barrel 12 to perform telescopic movement;

[0062] When the working gas port on the front cover 11 of the first-stage cylinder is inflated, the working gas port on the rear cover of the first-stage cylinder is exhausted. At this time, the piston 14 of the first-stage cylinder moves backward in the first-stage cylinder barrel 12, driving the first-stage cylinder barrel 12 to retract.

[0063] When the working gas port on the rear cover of the first stage is inflated, the working gas port on the front cover 11 of the first stage cylinder is exhausted. At this time, the piston 14 of the first stage cylinder moves forward in the first stage cylinder barrel 12, driving the first stage cylinder barrel 12 to extend.

[0064] The movement of the secondary cylinder piston 23 in the secondary cylinder barrel 22 is controlled by the inflation and exhaust of the two air passages 32, thereby driving the piston rod 31 to complete the telescopic movement;

[0065] When the air passage 32 connected to the front end of the secondary cylinder piston 23 is inflated, the air passage 32 connected to the rear end of the secondary cylinder piston 23 is exhausted, and at this time, the secondary cylinder piston 23 moves backward, thereby driving the piston rod 31 to complete the retraction movement;

[0066] When the air passage 32 connected to the rear end of the secondary cylinder piston 23 is inflated, the air passage 32 connected to the front end of the secondary cylinder piston 23 is exhausted, and at this time, the secondary cylinder piston 23 moves forward, thereby driving the piston rod 31 to complete the extension movement;

[0067] The second-stage cylinder piston 23 and the first-stage cylinder piston 14 can be independently controlled, and the extension and retraction of the second-stage cylinder barrel 22 and the piston rod 31 can be independently controlled.

[0068] When it is necessary to extract the liquid medicine, the pull rod 33 is driven to move by the small cylinder 34, and then the valve core is driven to move. When the small cylinder 34 is extended, the valve core is opened, and when the small cylinder 34 is retracted, the valve core is closed, so that the liquid medicine can pass through the piston rod 31 to complete the extraction of the liquid medicine.

[0069] The preferred specific embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above specific embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A liquid filling multi-stage cylinder, characterized in that: include: A first-stage cylinder assembly comprises a first-stage cylinder front end cover (11), a first-stage cylinder barrel (12), a first-stage cylinder rear end cover (13), and a first-stage cylinder piston (14); The first-stage cylinder front end cover (11) and the first-stage cylinder rear end cover (13) are respectively arranged at two ends of the first-stage cylinder barrel (12); The primary cylinder piston (14) is disposed in the primary cylinder barrel (12) and is adapted to fit the primary cylinder barrel (12); The first-stage cylinder front end cover (11) and the first-stage cylinder rear end cover (13) are both provided with working gas ports; A two-stage cylinder assembly, comprising a two-stage cylinder front end cover (21), a two-stage cylinder barrel (22), and a two-stage cylinder piston (23); The secondary cylinder (22) is arranged inside the primary cylinder (12); The front end cover (21) of the secondary cylinder is arranged at the front end of the secondary cylinder barrel (22), and the piston (14) of the primary cylinder is arranged at the rear end of the secondary cylinder barrel (22); The secondary cylinder piston (23) is arranged in the secondary cylinder barrel (22) and is adapted to the secondary cylinder barrel (22); The piston rod (31) is connected to the secondary cylinder piston (23) and is hollow; The piston rod (31) passes through the front end cover (21) of the secondary cylinder, the piston (14) of the primary cylinder, and the rear end cover (13) of the primary cylinder; A switch valve (35) is provided at the front end of the piston rod (31), and a small cylinder (34) for controlling the switch valve is provided at the rear end. The valve core of the switch valve (35) is connected to the output end of the small cylinder (34) via a pull rod (33); Two air passages (32) are provided on the wall of the piston rod (31), and the two air passages (32) are respectively connected to the front and rear ends of the secondary cylinder piston (23).

2. A liquid filling multi-stage cylinder according to claim 1, characterized in that: A primary sealing ring is provided between the primary cylinder front end cover (11) and the secondary cylinder barrel (22).

3. A liquid filling multi-stage cylinder according to claim 1, characterized in that: A first sealing ring is provided between the rear end cover (13) of the first-stage cylinder and the piston rod (31).

4. A liquid filling multi-stage cylinder according to claim 1, characterized in that: A second sealing ring is provided between the front end cover (21) of the secondary cylinder, the piston (14) of the primary cylinder and the piston rod (31).

5. The liquid filling multi-stage cylinder according to claim 1 is characterized in that: Piston sealing rings are provided between the primary cylinder piston (14) and the primary cylinder barrel (12), and between the secondary cylinder piston (23) and the secondary cylinder barrel (22).

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