Liquid filling multistage cylinder

Abstract

The application discloses a kind of liquid filling multistage air cylinder, comprising: primary cylinder assembly, including primary cylinder front end cover, primary cylinder, primary cylinder rear end cover, primary cylinder piston;The primary cylinder front end cover, primary cylinder rear end cover are all opened with working air port;Second cylinder assembly, including second cylinder front end cover, second cylinder, second cylinder piston;Second cylinder front end cover is set in the front end of second cylinder, and primary cylinder piston is set in the rear end of second cylinder;The second cylinder piston is set in the second cylinder, and is adapted with the second cylinder;Piston rod is connected with second cylinder piston, and is hollow;Piston rod front end is equipped with switch valve, rear end is equipped with small air cylinder, and the valve core of switch valve is connected with the output end of small air cylinder by pull rod;Two air passages are opened on the wall of piston rod tube, two air passages are respectively connected with the front and rear ends of second cylinder piston, and are respectively used to control the advance and retreat of second cylinder piston.

Description

Technical Field

[0001] This invention belongs to the field of traditional Chinese medicine liquid filling, and particularly relates to a multi-stage cylinder for liquid filling. Background Technology

[0002] The upper part of the Chinese medicine liquid storage cylinder contains liquid and the lower part contains medicinal residue. The liquid filling port is at the bottom, and the medicinal residue is also at the bottom. Traditional liquid filling is done by drawing liquid from the bottom of the tank, and the liquid is mixed with residue, so the quality does not meet the requirements. If it is extracted from the top, a water pump must be used, and it is very inconvenient to extract from the top because the top of the tank is sealed, and it is not conducive to continuous operation.

[0003] We want to extract a liquid that has no residue on the top, so the liquid needs to be extracted from top to bottom, avoiding the residue. This top-down movement is similar to that of a cylinder. How to use a cylinder to extract the liquid is the point that needs to be solved.

[0004] The current structure of a common single-stage cylinder is: front and rear end covers, a cylinder, a piston, and a piston rod. There is an air port on each of the front and rear end covers. When air enters through one air port, air exits through the other, causing the piston to move.

[0005] The structure of a typical multistage cylinder is as follows: a cylinder contains multiple cylinder barrels and multiple pistons. The pistons and cylinder barrels are connected as one unit. The smaller cylinder barrels are fitted inside the larger cylinder barrels. Like an antenna, they can extend and retract one stage at a time. After air enters through the air inlet of the end cap, the cylinders can extend or retract one stage at a time like an antenna. However, they cannot stay at a designated position in the middle.

[0006] In summary, traditional cylinders cannot achieve individual control of the extension and retraction of each stage, and they do not have a channel for extracting liquid medicine, so they cannot be used for extracting liquid medicine from top to bottom. Therefore, it is necessary to design a multi-stage liquid filling cylinder to extract liquid without residue in the upper part of the storage cylinder, 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 multi-stage cylinder for liquid filling, so as to solve the above-mentioned problems existing in the prior art.

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

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

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

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

[0012] Both the front cover and rear cover of the first-stage cylinder have working air ports.

[0013] The second-stage cylinder assembly includes the second-stage cylinder front cover, the second-stage cylinder barrel, and the second-stage cylinder piston;

[0014] The secondary cylinder is disposed inside the primary cylinder, and the front end cover of the primary cylinder is fitted onto the secondary cylinder.

[0015] The front cover of the second-stage cylinder is located at the front end of the second-stage cylinder barrel, and the piston of the first-stage cylinder is located at the rear end of the second-stage cylinder barrel;

[0016] The piston of the second-stage cylinder is disposed inside the second-stage cylinder barrel and is adapted to the second-stage cylinder barrel; the front end cover of the second-stage cylinder is sleeved on the piston rod.

[0017] The piston rod, connected to the piston of the second-stage cylinder, is hollow.

[0018] The piston rod extends beyond the front cover of the second-stage cylinder, the piston of the first-stage cylinder, and the rear cover of the first-stage cylinder, and liquid can flow inside the hollow rod;

[0019] The piston rod has a switching valve at the front end and a small cylinder at the rear end for controlling the switching valve. The valve core of the switching valve is connected to the output end of the small cylinder via a pull rod.

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

[0021] The piston rod tube wall has two air passages, which are connected to the front and rear ends of the second-stage cylinder piston, respectively, and are used to control the forward and backward movement of the second-stage cylinder piston.

[0022] The piston of the first-stage cylinder assembly also serves as the rear end cover of the second-stage cylinder assembly, and the cylinder barrel of the second-stage cylinder also serves as the piston rod of the first-stage cylinder assembly.

[0023] This invention connects the piston rod to the piston of the secondary cylinder, and designs the piston rod to be hollow. A switching valve is designed at the end of the piston rod, and a small cylinder designed at the other end drives the pull rod to complete the opening and closing of the valve core of the switching valve, thereby completing the extraction of the medicine.

[0024] Working ports are opened on the front cover and rear cover of the first-stage cylinder to control the movement of the piston in the first-stage cylinder;

[0025] Two air passages are provided on the piston rod tube wall. The two air passages are connected to the front and rear ends of the second-stage cylinder piston, respectively, and are used to control the forward and backward movement of the second-stage cylinder piston. This enables the independent control of the second-stage cylinder piston and the first-stage cylinder piston, and further enables the independent control of the extension and retraction of the second-stage cylinder barrel and piston rod.

[0026] In a further embodiment, a primary sealing ring is provided between the front 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 second-stage cylinder, the piston of the first-stage cylinder, and the piston rod.

[0029] In a further embodiment, piston sealing rings are provided between the first-stage cylinder piston and the first-stage cylinder barrel, and between the second-stage cylinder piston and the second-stage cylinder barrel.

[0030] Beneficial effects: This invention discloses a multi-stage cylinder for liquid filling. The invention connects the piston rod to the piston of the second-stage cylinder and designs the piston rod to be hollow. A switching valve is designed at the end of the piston rod, and a small cylinder designed at the other end drives the pull rod to complete the opening and closing of the valve core of the switching valve, thereby completing the extraction of the liquid medicine.

[0031] Working ports are opened on the front cover and rear cover of the first-stage cylinder to control the movement of the piston in the first-stage cylinder;

[0032] Two air passages are provided on the piston rod tube wall. The two air passages are connected to the front and rear ends of the second-stage cylinder piston, respectively, and are used to control the forward and backward movement of the second-stage cylinder piston. This enables the independent control of the second-stage cylinder piston and the first-stage cylinder piston, and further enables the independent control of the extension and retraction of the second-stage cylinder barrel and piston rod. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the present invention.

[0034] The attached figures are labeled as follows:

[0035] 11. First-stage cylinder front cover; 12. First-stage cylinder barrel; 13. First-stage cylinder rear cover; 14. First-stage cylinder piston;

[0036] 21. Second-stage cylinder front cover; 22. Second-stage cylinder barrel; 23. Second-stage cylinder piston;

[0037] 31. Piston rod; 32. Air passage; 33. Connecting rod; 34. Small cylinder; 35. Switch valve. Detailed Implementation

[0038] This application relates to a multi-stage cylinder for liquid filling, which will be explained in detail below through specific embodiments.

[0039] A multi-stage cylinder for liquid filling, 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 front end cover 11 and the rear end cover 13 of the first-stage cylinder are respectively disposed at both ends of the first-stage cylinder barrel 12;

[0042] The first-stage cylinder piston 14 is disposed inside the first-stage cylinder barrel 12 and is adapted to the first-stage cylinder barrel 12;

[0043] Both the front cover 11 and the rear cover 13 of the first-stage cylinder have working air ports.

[0044] The second-stage cylinder assembly includes a second-stage cylinder front cover 21, a second-stage cylinder barrel 22, and a second-stage cylinder piston 23;

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

[0046] The front cover 21 of the second-stage cylinder is located at the front end of the second-stage cylinder barrel 22, and the piston 14 of the first-stage cylinder is located at the rear end of the second-stage cylinder barrel 22;

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

[0048] Piston rod 31, connected to secondary cylinder piston 23, is hollow;

[0049] The piston rod 31 extends out of the front cover 21 of the second-stage cylinder, the piston 14 of the first-stage cylinder, and the rear cover 13 of the first-stage cylinder, and liquid can flow inside the hollow rod.

[0050] The piston rod 31 has a switching valve 35 at the front end and a small cylinder 34 at the rear end for controlling the switching valve. The valve core of the switching valve 35 is connected to the output end of the small cylinder 34 via a pull rod 33.

[0051] When the small cylinder 34 extends, the valve core opens; when the small cylinder 34 retracts, the valve core closes.

[0052] The piston rod 31 has two air passages 32 on its tube wall. The two air passages 32 are respectively connected to the front and rear ends of the second-stage cylinder piston 23 and are used to control the forward and backward movement of the second-stage cylinder piston 23.

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

[0054] The present invention connects the piston rod 31 to the secondary cylinder piston 23, and designs the piston rod 31 as hollow. The piston rod 31 is designed with a switch valve 35 at the end. The switch valve 35 is opened and closed by a small cylinder 34 designed at the other end, which drives the pull rod 33 to complete the opening and closing of the valve core of the switch valve 35, thereby completing the extraction of the medicine.

[0055] Working ports are opened on the front cover 11 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 wall of the piston rod 31. The two air passages 32 are respectively connected to the front and rear ends of the second-stage cylinder piston 23, and are used to control the forward and backward movement of the second-stage cylinder piston 23, so as to realize the individual control of the second-stage cylinder piston 23 and the first-stage cylinder piston 14, and thus the individual control of the extension and retraction of the second-stage cylinder 22 and the piston rod 31.

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

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

[0059] A second sealing ring is provided between the front cover 21 of the second-stage cylinder, the piston 14 of the first-stage cylinder, and the piston rod 31.

[0060] A piston sealing ring is provided between the first-stage cylinder piston 14 and the first-stage cylinder barrel 12, and between the second-stage cylinder piston 23 and the second-stage cylinder barrel 22.

[0061] Working principle description: During operation, the movement of the piston 14 of the first-stage cylinder is controlled by the air filling and exhausting of the working air ports on the front cover 11 and the rear cover 13 of the first-stage cylinder, which in turn drives the cylinder 12 of the first-stage cylinder to perform extension and retraction movements.

[0062] When the working port on the front cover 11 of the first stage cylinder is filled with air, the working 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 cylinder barrel 12 of the first stage cylinder, which drives the cylinder barrel 12 of the first stage cylinder to retract.

[0063] When the working air port on the rear end cover of the first stage is filled with air, the working air port on the front end 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, which drives the first stage cylinder barrel 12 to extend.

[0064] By controlling the inflation and deflation of the two air passages 32, the movement of the piston 23 in the second-stage cylinder 22 is controlled, thereby driving the piston rod 31 to complete the extension and retraction movement.

[0065] When the air passage 32 connected to the front end of the second-stage cylinder piston 23 is filled with air, the air passage 32 connected to the rear end of the second-stage cylinder piston 23 is exhausted. At this time, the second-stage cylinder piston 23 moves backward, which in turn drives the piston rod 31 to complete the retraction movement.

[0066] When the air passage 32 connected to the rear end of the second-stage cylinder piston 23 is filled with air, the air passage 32 connected to the front end of the second-stage cylinder piston 23 is exhausted. At this time, the second-stage cylinder piston 23 moves forward, which in turn drives the piston rod 31 to complete the extension movement.

[0067] This enables the individual control of the secondary cylinder piston 23 and the primary cylinder piston 14, and further enables the individual control of the extension and retraction of the secondary cylinder barrel 22 and the piston rod 31.

[0068] When it is necessary to extract the medicine, the small cylinder 34 drives the pull rod 33 to move, which in turn drives the valve core to move. When the small cylinder 34 extends, the valve core opens; when the small cylinder 34 retracts, the valve core closes, allowing the medicine to pass through the piston rod 31 and complete the extraction of the medicine.

[0069] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A multi-stage cylinder for liquid filling, characterized in that, include: 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). The front end cap (11) and rear end cap (13) of the first-stage cylinder are respectively disposed at both ends of the first-stage cylinder barrel (12); The first-stage cylinder piston (14) is disposed inside the first-stage cylinder barrel (12) and is adapted to the first-stage cylinder barrel (12); Both the front cover (11) and the rear cover (13) of the first-stage cylinder have working air ports. The second-stage cylinder assembly includes a second-stage cylinder front cover (21), a second-stage cylinder barrel (22), and a second-stage cylinder piston (23). The secondary cylinder (22) is disposed inside the primary cylinder (12); The front cover (21) of the second-stage cylinder is located at the front end of the second-stage cylinder barrel (22), and the piston (14) of the first-stage cylinder is located at the rear end of the second-stage cylinder barrel (22); The secondary cylinder piston (23) is disposed inside 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) extends out of the front cover (21) of the second-stage cylinder, the piston (14) of the first-stage cylinder, and the rear cover (13) of the first-stage cylinder; The piston rod (31) has a switching valve (35) at the front end and a small cylinder (34) at the rear end for controlling the switching valve. The valve core of the switching valve (35) is connected to the output end of the small cylinder (34) through a pull rod (33). The piston rod (31) has two air passages (32) on its tube wall, and the two air passages (32) are respectively connected to the front and rear ends of the second-stage cylinder piston (23); When extracting the medicine, the small cylinder (34) drives the pull rod (33) to move, which in turn drives the valve core to move. When the small cylinder (34) extends, the valve core opens; when the small cylinder (34) retracts, the valve core closes, so that the medicine can pass through the piston rod (31) to complete the extraction of the medicine.

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

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

5. A multi-stage liquid filling cylinder according to claim 1, characterized in that: A piston sealing ring is provided between the first-stage cylinder piston (14) and the first-stage cylinder barrel (12), and between the second-stage cylinder piston (23) and the second-stage cylinder barrel (22).

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