Pneumatic filling valve with height-adjustable air return pipe
By introducing the return air pipe adjustment ring and the flow guide ring into the pneumatic liquid filling valve, the separation between the liquid and the return air pipe and the liquid level height adjustment are solved, and the problem of inability to adjust the liquid level and workload in the prior art is improved. Filling speed and efficiency.
Patent Information
- Application Number
- CN202421185389.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-28
AI Technical Summary
The existing pneumatic liquid filling valve cannot adjust the liquid level height in the container at any time during the filling process, and replacing the return air pipe of different lengths requires a lot of workload, which makes the filling efficiency low.
A pneumatic filling valve with adjustable height of the return air pipe is designed. By introducing the return air pipe adjustment ring and the flow guide ring into the filling valve, the liquid is separated from the return air pipe by centrifugal force, so that the liquid flow and dispersion are evenly distributed, and lifted through the container. The device adjusts the insertion depth of the return air pipe to achieve dynamic adjustment of the liquid level height.
It improves filling speed and efficiency, solves the convenience of liquid level height adjustment, reduces the workload of replacing the air pipe, and realizes flexible response to changes in the shape of the container.
Smart Images
Figure CN222293597U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pneumatic liquid filling valves, in particular to a pneumatic filling valve with an adjustable air return pipe height. Background Art
[0002] There are two metering methods for liquid filling: quantitative filling and fixed liquid level filling. If the volume deviation of the container itself is relatively large, such as a glass bottle container, fixed liquid level filling is usually used.
[0003] The pneumatic liquid filling valve commonly used at present is that during filling, the container mouth is sealed with the filling valve, and the filled liquid is diverted by the diverter umbrella and poured into the container along the inner wall of the container. At the same time, the gas in the container returns to the material cylinder along the return air pipe; when the liquid level in the filled container reaches the lower end of the return air pipe, the filling is completed because the gas in the container can no longer be discharged.
[0004] Therefore, the final height of the liquid level in the bottle depends on the depth of the return air pipe inserted into the container.
[0005] When the shape of the container changes, or the filling liquid level needs to be changed, the current filling valve adopts the method of replacing the return air pipe of different lengths. However, this method is very labor-intensive and the liquid level in the container cannot be adjusted at any time during the filling process. Therefore, it is necessary to improve the deficiencies of the existing technology. Utility Model Content
[0006] The utility model aims to provide a pneumatic filling valve with an adjustable air return pipe height to solve the problems raised in the background technology.
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pneumatic filling valve with adjustable return air pipe height, comprising a material cylinder and a container, the filling valve being installed on the material cylinder, the lower part of the material cylinder being liquid material to be filled into the container, the upper part of the material cylinder being gas, a valve opening cylinder being arranged on the top of the filling valve, a piston rod being arranged on the output end of the valve opening cylinder, the lower end of the piston rod being fixedly connected to the valve stem, a sealing bellows being arranged on the valve stem and being sealed with the top cover of the material cylinder, a return air pipe being arranged inside the valve stem, the piston rod being hollow, the return air pipe being able to pass through the piston rod, a valve seat being fixedly arranged on the lower side of the material cylinder, a guide ring being arranged between the material cylinder and the valve seat, and the lower end of the container A container lifting device is arranged on the side, a centering cover is arranged on the outer side of the mouth of the container, a filling nozzle is arranged on the outer side of the centering cover, and the filling nozzle is fixedly mounted on the valve seat, the return air pipe passes upward through the entire valve stem and passes through the valve opening cylinder, the upper end of the return air pipe is fixed on the return air pipe adjusting ring by a lower retaining ring and an upper retaining ring, the distance between the lower retaining ring and the upper retaining ring is greater than the thickness of the return air pipe adjusting ring, and the gap is equal to the stroke when the valve stem moves up and down, when the filling valve is switched, there is no relative movement between the return air pipe and the valve stem, and a tangential spiral sheet is arranged on the guide ring, and the liquid material rotates when passing through the guide ring, and the centrifugal force is used to separate the liquid material from the return air pipe and flow into the container along the inside of the container.
[0008] When the container lifting device drives the container to rise, the container mouth drives the centering cover and the bottle mouth sealing ring to rise together until the bottle mouth sealing ring is pressed tightly against the filling nozzle. At this time, the container and the filling valve are sealed together. The container lifting device adopts conventional lifting equipment.
[0009] When the filling liquid level needs to be increased, the return air pipe adjustment ring rises, driving the return air pipe to rise, reducing the depth of the return air pipe inserted into the container, and the liquid level in the container can be increased when filling is completed;
[0010] When the filling liquid level needs to be lowered, the return air pipe adjustment ring descends, driving the return air pipe downward, increasing the depth of the return air pipe inserted into the container, and the liquid level in the container can be lowered when filling is completed;
[0011] Furthermore, the return air pipe can also adopt a split structure design, the split structure includes the lower end of the piston rod fixedly connected to the air valve stem, the pull rod passes through the air valve stem and the valve opening cylinder, the upper end of the pull rod is fixed to the return air pipe adjustment ring by the lower retaining ring and the upper retaining ring, the upper end of the split return air pipe is connected to the lower end of the pull rod, and there is a gap between the two for up and down movement, and the size of the gap is equal to the stroke of the air valve stem when moving up and down.
[0012] Furthermore, the gas in the material cylinder can also be collected by using an independent structure of a return air chamber. The independent structure of the return air chamber includes a return air pipe that is hollow inside and is connected to the return air chamber through a pipe joint and a hose after passing through a return air pipe adjustment ring.
[0013] Furthermore, the lower end between the return air pipe and the valve stem is sealed by a third sealing ring, the middle part is sealed by a second sealing ring, and the upper part is sealed by a first sealing ring. A sealing ring is installed at the lower end of the valve stem, and between the first sealing ring and the second sealing ring, the gas at the lower end of the return air pipe is connected with the gas in the material cylinder through the annular gap between the return air pipe and the valve stem and the small holes opened on the return air pipe and the valve stem.
[0014] Furthermore, the guide ring is provided with an inner hole, and the inner hole is used to support the lower end of the valve stem.
[0015] Furthermore, a bottle mouth sealing ring is provided between the filling nozzle and the container, and the bottle mouth sealing ring is used to seal the container and the filling nozzle together.
[0016] Furthermore, a fourth sealing ring is installed at the lower end of the gas valve stem.
[0017] Compared with the prior art, the utility model provides a pneumatic filling valve with adjustable return air pipe height, which has the following beneficial effects:
[0018] The pneumatic filling valve with adjustable return pipe height adds a return pipe height adjustment mechanism on the basis of the original pneumatic liquid filling valve, and adopts a centrifugal diversion device at the same time, so that according to the shape of the container, when the height of the filled liquid needs to be changed, the height of the return pipe can be freely adjusted, which changes the existing filling valve's method of replacing return pipes of different lengths, solves the problems of large workload, low filling efficiency, and the inability to adjust the liquid level height in the container at any time during the filling process, and through the centrifugal diversion of the guide ring, the liquid is evenly dispersed and the filling speed is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the structure of the pneumatic liquid filling valve for non-gas-containing liquids of the utility model;
[0020] Figure 2 This is a schematic diagram of the structure of a pneumatic liquid filling valve with an independent gas return chamber for non-gas-containing liquids of the utility model;
[0021] Figure 3 This is a schematic diagram of the structure of the pneumatic liquid filling valve for steam-containing liquid of the utility model;
[0022] Figure 4 For this utility model Figure 1 The enlarged schematic diagram of point A in the middle;
[0023] Figure 5 For this utility model Figure 1 The enlarged schematic diagram of point B in the middle;
[0024] Figure 6For this utility model Figure 2 The enlarged schematic diagram of the center C;
[0025] Figure 7 For this utility model Figure 3 The enlarged schematic diagram of point D in the middle;
[0026] Figure 8 For this utility model Figure 1-3 Schematic diagram of the cross-section at AA in the middle.
[0027] In the figure: 1. upper retaining ring; 2. return air pipe adjustment ring; 3. lower retaining ring; 4. valve opening cylinder; 5. sealing bellows; 6. container lifting device; 7. first sealing ring; 8. second sealing ring; 9. valve stem; 10. guide ring; 11. valve seat; 12. sealing ring; 13. filling nozzle; 14. bottle mouth sealing ring; 15. centering cover; 16. third sealing ring; 17. return air pipe; 18. material cylinder; 19. liquid material; 20. gas; 21. container; 22. return air chamber; 23. pipe joint; 24. hose; 25. gas valve stem; 26. pull rod; 27. fourth sealing ring. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] Embodiment 1:
[0030] See also Figure 1 , Figure 4 , Figure 5 and Figure 8, a pneumatic filling valve with adjustable return air pipe height comprises a material cylinder 18 and a container 21, the filling valve is mounted on the material cylinder 18, the lower part of the material cylinder 18 is a liquid material 19 to be filled into the container 21, the upper part of the material cylinder 18 is a gas 20, a valve opening cylinder 4 is arranged on the top of the filling valve, a piston rod is arranged on the output end of the valve opening cylinder 4, the lower end of the piston rod is fixedly connected to the valve stem 9, a sealing bellows 5 is arranged on the valve stem 9 and is sealed with the top cover of the material cylinder 18, a return air pipe 17 is arranged inside the valve stem 9, the piston rod is hollow, and the return air pipe 17 can pass through the piston rod, a valve seat 11 is fixedly mounted on the lower side of the material cylinder 18, a guide ring 10 is installed between the material cylinder 18 and the valve seat 11, a container lifting device 6 is arranged on the lower side of the container 21, and the container 21 A centering cover 15 is provided on the outer side of the mouth, and a filling nozzle 13 is provided on the outer side of the centering cover 15. The filling nozzle 13 is fixedly mounted on the valve seat 11. The return air pipe 17 passes upward through the entire valve stem 9 and passes through the valve opening cylinder 4. The upper end of the return air pipe 17 is fixed on the return air pipe adjusting ring 2 by the lower retaining ring 3 and the upper retaining ring 1. The distance between the lower retaining ring 3 and the upper retaining ring 1 is greater than the thickness of the return air pipe adjusting ring 2, and the gap is equal to the stroke of the valve stem 9 when moving up and down. When the filling valve is switched, there is no relative movement between the return air pipe 17 and the valve stem 9. A tangential spiral sheet is provided on the guide ring 10. The liquid material 19 rotates when passing through the guide ring 10, and the centrifugal force is used to separate the liquid material 19 from the return air pipe 17 and flow into the container 21 along the interior of the container 21.
[0031] When the container lifting device 6 drives the container 21 to rise, the container mouth drives the centering cover 15 and the bottle mouth sealing ring 14 to rise together until the bottle mouth sealing ring 14 is pressed against the filling nozzle 13. At this time, the container 21 is sealed together with the filling valve. The container lifting device 6 adopts conventional lifting equipment.
[0032] When the filling liquid level needs to be increased, the return air pipe adjusting ring 2 rises, driving the return air pipe 17 to rise, reducing the depth of the return air pipe 17 inserted into the container 21, and the liquid level in the container can be increased when the filling is completed;
[0033] When the filling liquid level needs to be lowered, the return air pipe adjusting ring 2 is lowered, driving the return air pipe 17 to descend, increasing the depth of the return air pipe 17 inserted into the container 21, and the liquid level in the container can be lowered when the filling is completed;
[0034] Furthermore, the lower end between the return air pipe 17 and the valve stem 9 is sealed by the third sealing ring 16, the middle part is sealed by the second sealing ring 8, and the upper part is sealed by the first sealing ring 7. A sealing ring 12 is installed at the lower end of the valve stem 9. Between the first sealing ring 7 and the second sealing ring 8, the gas 20 at the lower end of the return air pipe 17 is connected with the gas 20 in the cylinder 18 through the annular gap between the return air pipe 17 and the valve stem 9 and the small holes opened on the return air pipe 17 and the valve stem 9.
[0035] Furthermore, the guide ring 10 is provided with an inner hole, and the inner hole is used to support the lower end of the valve stem 9 .
[0036] Furthermore, a bottle mouth sealing ring 14 is provided between the filling nozzle 13 and the container 21 , and the bottle mouth sealing ring 14 is used to seal the container 21 and the filling nozzle 13 together.
[0037] Embodiment 2:
[0038] See also Figure 3 and Figure 7 The difference between Example 2 and Example 1 is that the return air pipe 17 can also adopt a split structure design, the split structure includes the lower end of the piston rod fixedly connected to the gas valve stem 25, the pull rod 26 passes through the gas valve stem 25 and the valve opening cylinder 4, the upper end of the pull rod 26 is fixed to the return air pipe adjustment ring 2 by the lower retaining ring 3 and the upper retaining ring 1, the upper end of the split return air pipe 17 is connected to the lower end of the pull rod 26, and there is a gap between the two for up and down movement, and the size of the gap is equal to the stroke of the gas valve stem 25 when it moves up and down.
[0039] A fourth sealing ring 27 is installed at the lower end of the gas valve stem 25 .
[0040] Embodiment 3:
[0041] See also Figure 2 and Figure 6 The difference between Example 3 and Examples 1 and 2 is that the gas 20 in the cylinder 18 can also be collected by using an independent structure of the return air chamber. The independent structure of the return air chamber includes a return air pipe 17 which is hollow inside and passes through the return air pipe adjustment ring 2 and is connected to the return air chamber 22 through a pipe joint 23 and a hose 24;
[0042] The specific usage and function of this embodiment are as follows:
[0043] Liquid filling valve working process:
[0044] 1. Seal the container.
[0045] Before filling, the piston rod of the valve opening cylinder 4 extends downward, driving the valve stem 9 and the sealing ring 12 to descend, the sealing ring 12 is pressed tightly against the valve seat 11, and the filling valve is closed.
[0046] When the container lifting device 6 drives the container 21 to rise, the container mouth drives the centering cover 15 and the bottle mouth sealing ring 14 to rise together until the bottle mouth sealing ring 14 is pressed against the filling nozzle 13. At this time, a closed filling space is formed between the container 21 and the filling valve.
[0047] 2. Liquid filling.
[0048] The piston rod of the valve opening cylinder 4 retracts upward, driving the valve stem 9 to rise, the sealing ring 12 separates from the valve seat 11, the liquid channel is opened, and the liquid material 19 to be filled rotates through the spiral sheet at the lower end of the guide ring 10 and flows downward; under the action of centrifugal force, the liquid leaves the surface of the lower end of the return pipe 17 and flows into the container 21 along the inner wall of the container 21; the gas in the container 21 returns to the material cylinder 18 through the small holes inside and at the upper end of the return pipe 17, the annular cavity formed by the upper end of the valve stem 9 and the return pipe 17, and the small hole at the upper end of the valve stem 9.
[0049] 3. Filling is completed.
[0050] When the liquid level in the container 21 reaches the lower end of the return air pipe 17, the liquid material 19 continues to rise along the inside of the return air pipe 17 until the pressure is balanced and the return air stops. At this time, the liquid 19 in the material cylinder 18 no longer flows downward at the spiral sheet at the lower end of the guide ring 10 due to the effect of the liquid surface tension; and the liquid under the spiral sheet falls into the container 21 due to its own weight, and the filling is completed.
[0051] 4. Close the filling valve.
[0052] The piston rod of the valve opening cylinder 4 extends downward, driving the valve stem 9 and the sealing ring 12 to descend, the sealing ring 12 is pressed tightly against the valve seat 11, and the filling valve is closed.
[0053] 5. Lower the bottle to take it out.
[0054] The container lifting device 6 descends, and the container 21, the centering cover 15, the bottle mouth sealing ring 14, and the like descend together and separate from the filling nozzle 13. Since the gas 20 in the material cylinder is in a negative pressure state, the liquid in the return pipe 17 is drawn back into the material cylinder 18.
[0055] The filling process is finished.
[0056] Other types of liquid filling valve applications
[0057] 1. Independent filling valve for return air chamber.
[0058] It is used for filling non-gas-containing liquids. During operation, the material cylinder 18 is in a normal pressure or micro-pressure state, and the return air chamber 22 is in a negative pressure state.
[0059] The return air chamber 22 is independent of the material cylinder 18; the return air pipe 17 is hollow inside and passes through the return air pipe adjustment ring 2 and is connected to the return air chamber 22 through the pipe joint 23 and the hose 24.
[0060] 2. Filling valve for gas-containing liquid.
[0061] The lower end of the piston rod of the valve opening cylinder 4 is connected to the gas valve stem 25, the lower end of the gas valve stem 25 is equipped with a sealing ring 27, the pull rod 26 passes through the gas valve stem 25 and the valve opening cylinder 4, and the upper end of the pull rod 26 is fixed to the return pipe adjustment ring 2 by the lower retaining ring 3 and the upper retaining ring 1. There is no gap between the lower retaining ring 3 and the upper retaining ring 1 and the return pipe adjustment ring 2 in the height direction.
[0062] The upper end of the return air pipe 17 is connected to the lower end of the pull rod 26, and there is a gap between the two for up and down movement, and the size of the gap is equal to the stroke of the air valve stem 25 when it moves up and down.
[0063] The other parts are irrelevant to this patent and will not be described again.
[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A pneumatic filling valve with adjustable return pipe height, comprising a material cylinder (18) and a container (21), wherein the filling valve is mounted on the material cylinder (18), wherein the lower portion of the material cylinder (18) contains liquid material (19) to be filled into the container (21), and the upper portion of the material cylinder (18) contains gas (20), wherein a valve opening cylinder (4) is disposed on the top of the filling valve, wherein a piston rod is mounted on the output end of the valve opening cylinder (4), wherein the lower end of the piston rod is fixedly connected to a valve stem (9), wherein a sealing bellows (5) is mounted on the valve stem (9) to seal with a top cover of the material cylinder (18), and wherein the valve stem (9) is provided with a sealing bellows (5 ... ) is provided with a return pipe (17) inside, the piston rod is hollow, and the return pipe (17) can pass through the piston rod, a valve seat (11) is fixedly installed on the lower side of the material cylinder (18), a guide ring (10) is installed between the material cylinder (18) and the valve seat (11), a container lifting device (6) is provided on the lower side of the container (21), a centering cover (15) is provided on the outer side of the mouth of the container (21), a filling nozzle (13) is provided on the outer side of the centering cover (15), and the filling nozzle (13) is fixedly installed on the valve seat (11), characterized in that: The return air pipe (17) passes through the entire valve stem (9) upwards and passes through the valve opening cylinder (4). The upper end of the return air pipe (17) is fixed to the return air pipe adjustment ring (2) by a lower retaining ring (3) and an upper retaining ring (1). The distance between the lower retaining ring (3) and the upper retaining ring (1) is greater than the thickness of the return air pipe adjustment ring (2), and the gap is equal to the stroke of the valve stem (9) when it moves up and down. The guide ring (10) is provided with a tangential spiral sheet. When the liquid material (19) passes through the guide ring (10), it rotates, and the centrifugal force is used to separate the liquid material (19) from the return air pipe (17) and the liquid material (19) flows into the container (21) along the inside of the container (21).
2. The pneumatic filling valve with adjustable return pipe height according to claim 1, characterized in that: The return air pipe (17) can also adopt a split structure design, the split structure includes the lower end of the piston rod fixedly connected to the air valve stem (25), the pull rod (26) passes through the air valve stem (25) and the valve opening cylinder (4), the upper end of the pull rod (26) is fixed to the return air pipe adjustment ring (2) by the lower retaining ring (3) and the upper retaining ring (1), the upper end of the split return air pipe (17) is connected to the lower end of the pull rod (26), and there is a gap between the two for upward and downward movement, and the size of the gap is equal to the stroke of the air valve stem (25) when it moves up and down.
3. The pneumatic filling valve with adjustable return pipe height according to claim 1, characterized in that: The gas (20) in the material cylinder (18) can also be collected by using an independent structure of a return air chamber. The independent structure of the return air chamber includes a return air pipe (17) which is hollow inside and passes through a return air pipe adjustment ring (2) and is connected to the return air chamber (22) via a pipe joint (23) and a hose (24).
4. The pneumatic filling valve with adjustable return pipe height according to claim 1, characterized in that: The lower end between the return air pipe (17) and the valve stem (9) is sealed by a third sealing ring (16), the middle part is sealed by a second sealing ring (8), and the upper part is sealed by a first sealing ring (7). A sealing ring (12) is installed at the lower end of the valve stem (9). Between the first sealing ring (7) and the second sealing ring (8), the gas (20) at the lower end of the return air pipe (17) is connected to the gas (20) in the material cylinder (18) through the annular gap between the return air pipe (17) and the valve stem (9) and the small holes provided on the return air pipe (17) and the valve stem (9).
5. The pneumatic filling valve with adjustable return pipe height according to claim 1, characterized in that: The guide ring (10) is provided with an inner hole, and the inner hole is used to support the lower end of the valve stem (9).
6. The pneumatic filling valve with adjustable return pipe height according to claim 1, characterized in that: A bottle mouth sealing ring (14) is provided between the filling nozzle (13) and the container (21), and the bottle mouth sealing ring (14) is used to seal the container (21) and the filling nozzle (13) together.
7. The pneumatic filling valve with adjustable return pipe height according to claim 2, characterized in that: A fourth sealing ring (27) is installed at the lower end of the gas valve stem (25).