Negative pressure feeding system
By designing a piston of a cylinder in the negative pressure feeding system and switching with different air pressure states, the problem of the existing system requiring multiple cylinders is solved, and efficient suction and automatic discharge of materials is achieved, reducing costs and space occupancy.
Patent Information
- Application Number
- CN202421770952.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-25
AI Technical Summary
Existing negative pressure feed systems require at least two cylinders, resulting in high costs and large space occupancy.
A negative pressure feeding system is designed, and the piston of a cylinder is switched through different states (strong negative pressure, weak negative pressure and vacuum breakage) to achieve changes in the air pressure state in the silo, thereby sucking and exhausting materials.
It realizes the suction and automatic discharge of materials with only one cylinder, reducing the cost and space of the system.
Smart Images
Figure CN222906924U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of negative pressure feeding, in particular to a negative pressure feeding system. Background Art
[0002] Existing negative pressure feeding systems usually need to be equipped with at least two cylinders, one cylinder is used to suck materials into the silo through negative pressure feeding, and the other cylinder is used to break the vacuum state in the silo, or one cylinder is used to suck materials under negative pressure, and then a gravity hammer is used to break the vacuum of the silo to facilitate the discharge of materials in the silo. This negative pressure feeding system requires more driving devices, resulting in high costs and large space occupation. Utility Model Content
[0003] The utility model aims to provide a negative pressure feeding system, which can realize vacuum suction of materials with only one cylinder and can automatically discharge materials, and is easy to use.
[0004] In order to solve the above technical problems, the utility model adopts the following solutions:
[0005] A negative pressure feeding system includes a silo, the silo is connected to a vacuum valve, a piston is arranged in the vacuum valve, a vacuum breaking port for connecting to the outside of the vacuum valve and a negative pressure port for connecting to a negative pressure gas source are arranged on the vacuum valve, the piston has a vacuum breaking state for blocking the negative pressure port so that the vacuum breaking port is connected to the outside of the vacuum valve, a strong negative pressure state for blocking the vacuum breaking port so that the negative pressure port is connected to the negative pressure gas source, and a weak negative pressure state for connecting the vacuum breaking port to the outside of the vacuum valve and the negative pressure gas source. In the process of the piston moving from the vacuum breaking port to the negative pressure port, the piston passes through a strong negative pressure state, a weak negative pressure state, and a vacuum breaking state in sequence. Its function is that, through the setting of the piston, it can switch between blocking the vacuum breaking port and blocking the negative pressure port, thereby changing the gas pressure state in the silo, when the piston is in a strong negative pressure state and a weak negative pressure state, the silo inhales materials, and when the piston is in a vacuum breaking state, the silo stops inhaling materials.
[0006] Furthermore, the vacuum valve includes a blocking section and a cylinder section, the piston penetrates the blocking section and the cylinder section, a blocking plate is provided on the driving of the piston in the blocking section, the negative pressure port is provided in the axial extension direction of the piston rod, and an exhaust groove is provided in the vacuum valve opposite to the negative pressure port, and the exhaust groove is connected to the vacuum breaking port. The cylinder section is the cylinder structure in the prior art and will not be described in detail. Its function is to achieve the blocking of the negative pressure port and the exhaust groove through the setting of the blocking plate.
[0007] Furthermore, a connecting piece is provided between the blocking section and the cylinder section, the vacuum breaking port is provided on the side wall of the connecting piece, and a vent hole for the piston rod to pass through is provided on the connecting piece, and the inner diameter of the vent hole is larger than the outer diameter of the piston rod. An exhaust groove is provided on the connecting piece toward the negative pressure port. Its function is to enable the exhaust groove to communicate with the vacuum breaking port through the provision of the vent hole.
[0008] Furthermore, the cylinder section includes a shell, a first gas delivery port and a second gas delivery port are provided on the shell, a push plate is provided on the section of the piston rod located in the shell, and the first gas delivery port and the second gas delivery port are respectively connected to two spaces in the shell separated by the push plate. The shell, the first gas delivery port, the second gas delivery port, and the push plate are all structures of a cylinder in the prior art, and their working principles are the same as those of the cylinder in the prior art, and are not described in detail.
[0009] Furthermore, the exhaust groove is provided on the connecting piece, and the inner diameter of the exhaust groove is smaller than the outer diameter of the blocking plate. Its function is that, through the design of the size relationship between the exhaust groove and the blocking plate, the blocking plate can completely block the exhaust groove during the movement.
[0010] Furthermore, a sealing ring is provided between the connector and the sealing section, and the outer diameter of the sealing plate is within the inner diameter of the sealing ring. The sealing ring can enhance the sealing effect of the sealing plate on the vacuum breaker.
[0011] Furthermore, the outer diameter of the blocking plate is larger than the outer diameter of the negative pressure port. Its function is to completely block the negative pressure port during movement by designing the size relationship between the blocking plate and the negative pressure port.
[0012] Furthermore, a feed port is provided on the top surface of the silo.
[0013] Furthermore, a switch plate is provided at the bottom of the silo, and a counterweight is provided on the switch plate.
[0014] When the piston is in a strong negative pressure state or a weak negative pressure state, the switch plate is in a closed state, and when the piston is in a vacuum-breaking state and the weight of the material in the silo is greater than the weight of the counterweight, the switch plate is in an open state. Its function is to realize the automatic discharge of materials from the silo through the setting of the switch plate and the counterweight.
[0015] Furthermore, the switch plate is hinged outside the silo through a rotating shaft, the counterweight is in the shape of a pendant hung on the rotating shaft, and the counterweight is provided with a groove for the switch plate to be embedded in. Its function is that through the setting of the groove, the whole formed by the counterweight and the switch plate can rotate around the rotating shaft.
[0016] The utility model has the beneficial effects:
[0017] 1. Through the setting of the piston, it is possible to switch between blocking the vacuum port and blocking the negative pressure port, thereby changing the air pressure state in the silo. When the piston is in a strong negative pressure state and a weak negative pressure state, the silo inhales the material. When the piston is in a vacuum breaking state, the silo stops inhaling the material.
[0018] 2. By setting the blocking plate, the negative pressure port and the exhaust groove can be blocked.
[0019] 3. Automatic discharge of materials from the silo is achieved through the setting of the switch plate and the counterweight. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 is a schematic diagram of the three-dimensional structure of Example 1;
[0021] Figure 2 It is a schematic cross-sectional view of the structure of Example 1 under a strong negative pressure state;
[0022] Figure 3 It is a schematic cross-sectional view of the structure of Example 1 in a weak negative pressure state;
[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of Example 1 in a vacuum-broken state.
[0024] Figure numerals: 1. silo; 2. vacuum valve; 3. piston; 4. negative pressure port; 5. vacuum breaking port; 6. sealing section; 7. cylinder section; 8. sealing plate; 9. connecting piece; 10. vent; 11. first gas supply port; 12. second gas supply port; 13. push plate; 14. sealing ring; 15. feed port; 16. switch plate; 17. counterweight; 18. rotating shaft; 19. groove. DETAILED DESCRIPTION
[0025] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.
[0026] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.
[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "open", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0028] Example 1
[0029] A negative pressure feeding system, such as Figure 1 As shown, it includes a material bin 1, which is connected to a vacuum valve 2, in which a piston 3 is arranged, and the vacuum valve 2 is provided with a vacuum breaking port 5 for communicating with the outside of the vacuum valve 2 and a negative pressure port 4 for communicating with a negative pressure gas source. The piston 3 has a vacuum breaking state for blocking the negative pressure port 4 to make the vacuum breaking port 5 connected with the outside of the vacuum valve 2, a strong negative pressure state for blocking the vacuum breaking port 5 to make the negative pressure port 4 connected with the negative pressure gas source, and a weak negative pressure state for making both the vacuum breaking port 5 connected with the outside of the vacuum valve 2 and the negative pressure port 4 connected with the negative pressure gas source. In the process of the piston 3 moving from the vacuum breaking port 5 toward the negative pressure port 4, the piston 3 passes through the strong negative pressure state, the weak negative pressure state, and the vacuum breaking state in sequence. Its function is that, through the setting of the piston 3, it can switch between blocking the vacuum breaking port 5 and blocking the negative pressure port 4, thereby changing the air pressure state in the silo 1. When the piston 3 is in a strong negative pressure state and a weak negative pressure state, the silo 1 inhales materials. When the piston 3 is in a vacuum breaking state, the silo 1 stops inhaling materials.
[0030] Specifically, Figure 2 As shown, the vacuum valve 2 includes a blocking section 6 and a cylinder section 7, the piston 3 penetrates the blocking section 6 and the cylinder section 7, a blocking plate 8 is provided on the driving of the piston 3 in the blocking section 6, the negative pressure port 4 is provided in the axial extension direction of the piston 3 rod, and an exhaust groove is provided in the vacuum valve 2 opposite to the negative pressure port 4, and the exhaust groove is connected to the vacuum breaking port 5. The cylinder section 7 is the cylinder structure in the prior art and will not be described in detail. Its function is to achieve the blocking of the negative pressure port 4 and the exhaust groove through the setting of the blocking plate 8.
[0031] Specifically, Figure 2 As shown, a connector 9 is provided between the blocking section 6 and the cylinder section 7, and the vacuum breaking port 5 is provided on the side wall of the connector 9. The connector 9 is provided with a vent hole 10 for the piston 3 rod to pass through, and the inner diameter of the vent hole 10 is larger than the outer diameter of the piston 3 rod. An exhaust groove is provided on the connector 9 toward the negative pressure port 4. Its function is to enable the exhaust groove to communicate with the vacuum breaking port 5 through the provision of the vent hole 10.
[0032] Specifically, Figure 2 As shown, the cylinder section 7 includes a shell, a first gas delivery port 11 and a second gas delivery port 12 are provided on the shell, a push plate 13 is provided on the section of the piston 3 rod located in the shell, and the first gas delivery port 11 and the second gas delivery port 12 are respectively connected to two parts of the space in the shell separated by the push plate 13. The shell, the first gas delivery port 11, the second gas delivery port 12, and the push plate 13 are all structures of the cylinder in the prior art, and their working principles are the same as the working principles of the cylinder in the prior art, and are not described in detail.
[0033] Specifically, Figure 2 As shown, the exhaust groove is provided on the connecting member 9, and the inner diameter of the exhaust groove is smaller than the outer diameter of the blocking plate 8. Its function is that, through the design of the size relationship between the exhaust groove and the blocking plate 8, the blocking plate 8 can completely block the exhaust groove during the movement.
[0034] Specifically, Figure 2 As shown, a sealing ring 14 is provided between the connecting member 9 and the blocking section 6, and the outer diameter of the blocking plate 8 is within the inner diameter of the sealing ring 14. The function is that the sealing effect of the blocking plate 8 on the vacuum breaking port 5 can be enhanced by the setting of the sealing ring 14.
[0035] Specifically, Figure 2 As shown, the outer diameter of the blocking plate 8 is larger than the outer diameter of the negative pressure port 4. Its function is to completely block the negative pressure port 4 during the movement of the blocking plate 8 by designing the size relationship between the blocking plate 8 and the negative pressure port 4.
[0036] Specifically, Figure 2 As shown, a feed inlet 15 is provided on the top surface of the silo 1 .
[0037] Specifically, Figure 2 As shown, a switch plate 16 is provided at the bottom of the silo 1, and a counterweight 17 is provided on the switch plate 16.
[0038] When the piston 3 is in a strong negative pressure state or a weak negative pressure state, the switch plate 16 is in a closed state, and when the piston 3 is in a vacuum-breaking state and the weight of the material in the silo 1 is greater than the weight of the counterweight 17, the switch plate 16 is in an open state. Its function is to realize the automatic discharge of materials from the silo 1 through the setting of the switch plate 16 and the counterweight 17.
[0039] Specifically, Figure 2 As shown, the switch plate 16 is hinged to the outside of the silo 1 through a rotating shaft 18, and the counterweight 17 is in the shape of a pendant hung on the rotating shaft 18. The counterweight 17 is provided with a groove 19 for the switch plate 16 to be embedded. The counterweight 17 can be used with different weights according to the different weight requirements of the materials in the silo 1. Its function is that, through the provision of the groove 19, the whole formed by the counterweight 17 and the switch plate 16 can rotate around the rotating shaft 18.
[0040] The working principle of this embodiment is described as follows: Figure 2 As shown, under strong negative pressure, the first air delivery port 11 takes in air, and the second air delivery port 12 discharges air, so that the push plate 13 on the piston 3 drives the blocking plate 8 to press on the exhaust groove, and the air in the silo 1 is sucked away by the negative pressure port 4, and the feed port 15 sucks the material into the silo 1 with a large suction force. At the same time, the switch plate 16 is tightly attached to the silo 1 due to the negative pressure in the silo 1;
[0041] like Figure 3 As shown, under weak negative pressure, the first air delivery port 11 exhausts air, and the second air delivery port 12 intakes air, so that the push plate 13 on the piston 3 separates the blocking plate 8 from the exhaust groove, and the blocking plate 8 is now in a separated state from the negative pressure port 4, then the negative pressure port 4 and the vacuum breaking port 5 are both connected to the silo 1, and the negative pressure port 4 sucks away the air in the negative pressure port 4 and the air at the vacuum breaking port 5, the suction force in the silo 1 is reduced, and the feed port 15 sucks the material into the silo 1 with a smaller suction force, and at the same time, the switch plate 16 is closely attached to the silo 1 due to the negative pressure in the silo 1;
[0042] like Figure 4 As shown, in the vacuum breaking state, the first gas delivery port 11 exhausts air and the second gas delivery port 12 intakes air, so that the push plate 13 on the piston 3 drives the sealing plate 8 to press on the negative pressure port 4, and the vacuum breaking port 5 connects the silo 1 with the outside world. The silo 1 is at normal atmospheric pressure. When the weight of the material in the silo 1 is greater than the weight of the counterweight 17, the material in the silo 1 presses the switch plate 16 open by its own weight and is discharged.
[0043] The above is only a preferred embodiment of the utility model and does not limit the utility model in any form. According to the technical essence of the utility model, within the spirit and principles of the utility model, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the utility model.
Claims
1. A negative pressure feeding system, characterized in that: The invention comprises a material bin (1), the material bin (1) is connected to a vacuum valve (2), a piston (3) is arranged in the vacuum valve (2), a vacuum breaking port (5) for communicating with the outside of the vacuum valve (2) and a negative pressure port (4) for communicating with a negative pressure gas source are arranged on the vacuum valve (2), the piston (3) has a vacuum breaking state for blocking the negative pressure port (4) so that the vacuum breaking port (5) is connected with the outside of the vacuum valve (2), a strong negative pressure state for blocking the vacuum breaking port (5) so that the negative pressure port (4) is connected with the negative pressure gas source, and a weak negative pressure state so that the vacuum breaking port (5) is connected with the outside of the vacuum valve (2) and the negative pressure port (4) is connected with the negative pressure gas source. When the piston (3) moves from the vacuum breaking port (5) toward the negative pressure port (4), the piston (3) passes through the strong negative pressure state, the weak negative pressure state and the vacuum breaking state in sequence.
2. A negative pressure feeding system according to claim 1, characterized in that: The vacuum valve (2) comprises a blocking section (6) and a cylinder section (7); the piston (3) is arranged to penetrate the blocking section (6) and the cylinder section (7); a blocking plate (8) is provided on the driving of the piston (3) in the blocking section (6); the negative pressure port (4) is arranged in the axial extension direction of the piston (3) rod; an exhaust groove is arranged in the vacuum valve (2) opposite to the negative pressure port (4); and the exhaust groove is communicated with the vacuum breaking port (5).
3. A negative pressure feeding system according to claim 2, characterized in that: A connecting piece (9) is provided between the blocking section (6) and the cylinder section (7); the vacuum breaking port (5) is provided on the side wall of the connecting piece (9); and a vent hole (10) for the piston (3) rod to pass through is provided on the connecting piece (9); the inner diameter of the vent hole (10) is greater than the outer diameter of the piston (3) rod.
4. A negative pressure feeding system according to claim 3, characterized in that: The cylinder section (7) comprises a shell, on which a first gas delivery port (11) and a second gas delivery port (12) are provided, and a push plate (13) is provided on the section of the piston (3) rod located inside the shell, and the first gas delivery port (11) and the second gas delivery port (12) are respectively connected to two spaces separated by the push plate (13) inside the shell.
5. A negative pressure feeding system according to claim 3, characterized in that: The exhaust groove is arranged on the connecting piece (9), and the inner diameter of the exhaust groove is smaller than the outer diameter of the blocking plate (8).
6. A negative pressure feeding system according to claim 5, characterized in that: A sealing ring (14) is provided between the connecting piece (9) and the sealing section (6), and the outer diameter of the sealing plate (8) is within the inner diameter of the sealing ring (14).
7. A negative pressure feeding system according to claim 2, characterized in that: The outer diameter of the blocking plate (8) is greater than the outer diameter of the negative pressure port (4).
8. A negative pressure feeding system according to claim 1, characterized in that: The top surface of the silo (1) is provided with a feed inlet (15).
9. A negative pressure feeding system according to claim 1, characterized in that: The bottom of the silo (1) is provided with a switch plate (16), and a counterweight (17) is provided on the switch plate (16). When the piston (3) is in a strong negative pressure state or a weak negative pressure state, the switch plate (16) is in a closed state; when the piston (3) is in a vacuum-breaking state and the weight of the material in the silo (1) is greater than the weight of the counterweight (17), the switch plate (16) is in an open state.
10. A negative pressure feeding system according to claim 9, characterized in that: The switch plate (16) is hinged to the outside of the silo (1) via a rotating shaft (18); the counterweight (17) is in the shape of a pendant hung on the rotating shaft (18); and a groove (19) for the switch plate (16) to be embedded is provided on the counterweight (17).