Vacuum generating mechanism of dispensing system

Abstract

The present invention discloses a vacuum generating mechanism for a dispensing system, wherein an air extraction port and two air inlets are provided on the outer surface of one side of a vacuum chamber body, and the air extraction port and the air inlet each have a radially inwardly extending flange portion on the inner wall near one end of the interior of the vacuum chamber body, a first flange plate is embedded in the air extraction port, and a second flange plate is embedded in the air inlet, a pad is provided between the first cylinder and the connecting seat, and the other end of the elastic member is extruded and connected to the pad, the pad includes a main body near the first cylinder and a raised portion embedded in the air extraction port, a second through hole is provided in the center of the pad for the piston rod and the first core shaft of the first cylinder to pass through, and an air outlet hole connected to the second through hole is provided on the outer end surface of the pad. The present invention realizes the precise regulation of the air pressure in the vacuum chamber body, and can also gradually release the pressure during the vacuum breaking process, thereby reducing the impact load on the vacuum chamber body and extending the service life of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum cavity sealing, and in particular to a vacuum generating mechanism of a dispensing system. Background Art

[0002] During the dispensing process, air can easily enter the colloid, affecting dispensing quality. Therefore, vacuuming is required during the dispensing process, and the product must be kept in a vacuum state for a certain period of time to expel any air trapped within the colloid and ensure high product performance. In existing technologies, during vacuuming, the large pressure differential between the cavity and the external air pressure, as well as the delay in valve closing, can lead to unstable vacuum levels within the cavity. Furthermore, the adsorption force generated by the large internal and external pressure differential requires a high output power from the valve's closing mechanism. The high kinetic energy of the valve's opening and closing mechanism can impact the cavity, reducing its service life. Summary of the Invention

[0003] The purpose of the present invention is to provide a vacuum generating mechanism for a dispensing system. The vacuum generating mechanism of the dispensing system can realize the precise adjustment of the air pressure in the vacuum chamber on the basis of vacuuming the vacuum chamber body. It can also gradually release the pressure during the vacuum breaking process, thereby reducing the impact load on the vacuum chamber body and extending the service life of the equipment.

[0004] To achieve the above-mentioned object, the technical solution adopted by the present invention is as follows: a vacuum generating mechanism of a dispensing system is installed on a vacuum chamber body, an outer surface of one side of the vacuum chamber body is provided with an air extraction port and two air inlet ports, the air extraction port and the air inlet port each having a radially inwardly extending flange portion on an inner wall close to one end of the interior of the vacuum chamber body, a first flange plate is embedded in the air extraction port, and a second flange plate is embedded in the air inlet port, an end face of each of the first flange plate and the second flange plate is in surface contact with an end face of the corresponding flange portion, and the other end of each of the first flange plate and the second flange plate is connected to the piston rod of the corresponding first cylinder and the second cylinder;

[0005] The air extraction port is provided with a connecting seat, one end surface of the connecting seat is connected to the vacuum chamber body, the first cylinder is provided on the other end surface of the connecting seat, the piston rod of the first cylinder is connected to the first flange via a first core shaft, a first through hole communicating with the air extraction port is provided on the connecting seat along the direction of the first core shaft, the first core shaft is telescopically arranged in the first through hole, the connecting seat is further provided with an air extraction hole communicating with the first through hole, an air extraction seat is provided on the air extraction hole, and the air extraction hole is used to be connected to a vacuum pump;

[0006] An elastic member is mounted on the first core shaft, one end of the elastic member close to the first flange contacts the outer flange portion located on the end of the first core shaft, and the other end of the elastic member is extruded and connected to the housing of the first cylinder;

[0007] A pad is provided between the first cylinder and the connecting seat, and the other end of the elastic member is extruded and connected to the pad. The pad includes a main body close to the first cylinder and a protrusion embedded in the air extraction port. A second through hole is provided in the center of the pad for the piston rod and the first core shaft of the first cylinder to pass through. An air outlet hole connected to the second through hole is provided on the outer end surface of the pad.

[0008] The outer diameter ratio between the two second flanges respectively embedded in the two air inlets is 5:2~3. When the vacuum chamber body is in a pressure relief state, the second flange with a smaller outer diameter is first pulled out from the corresponding air inlet by the second cylinder. When the air pressure in the vacuum chamber body reaches a preset value, the second flange with a larger outer diameter is pulled out from the corresponding air inlet.

[0009] The further improved scheme in the above technical scheme is as follows:

[0010] 1. In the above solution, the elastic member is a bellows-shaped elastic member.

[0011] 2. In the above embodiment, a support washer is provided between the housing of the first cylinder and the elastic member.

[0012] 3. In the above solution, the support washer is mounted on the first core shaft and is in compression contact with the end surface of the elastic member.

[0013] 4. In the above solution, a screw passes through the first cylinder and the pad in sequence and connects to the connecting seat, thereby installing the first cylinder and the pad on the connecting seat.

[0014] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0015] 1. The vacuum generating mechanism of the dispensing system of the present invention is that the piston rod of the cylinder is connected to the first flange through a core shaft, and a through hole connected to the air exhaust port is provided on the connecting seat along the direction of the core shaft, and the core shaft is telescopically arranged in the through hole, and an elastic member is mounted on the core shaft, and one end of the elastic member close to the first flange is in contact with the outer flange portion located on the end of the core shaft, and the other end of the elastic member is extruded and connected to the shell of the cylinder. Through the setting of the elastic member, a superimposed force can be applied to the first flange when the first flange is closed, thereby improving the sealing performance of the first flange to the air exhaust port during long-term use, and preventing impact due to excessive contraction during the opening of the first flange, thereby extending the service life of the mechanism.

[0016] 2. The vacuum generating mechanism of the dispensing system of the present invention has an outer diameter ratio of 5:2~3 between the two second flanges respectively embedded in the two air inlets. When the vacuum chamber is in a pressure relief state, the second flange with a smaller outer diameter is pulled out from the corresponding air inlet by the second cylinder, and then the second flange with a larger outer diameter is pulled out from the corresponding air inlet. Through the coordinated arrangement between the first flange and the two second flanges of different sizes, on the basis of achieving vacuuming of the vacuum chamber, the precise adjustment of the air pressure in the vacuum chamber is further achieved, and the pressure can be relieved step by step during the vacuum breaking process, which not only avoids the sudden change of air pressure in the vacuum chamber and damage to products or equipment components, but also avoids the situation where the second flange cannot be opened due to insufficient output power of the cylinder. It reduces the requirements for cylinder output power, reduces energy consumption, reduces impact load on the vacuum chamber, and extends the service life of the equipment.

[0017] 3. The vacuum generating mechanism of the dispensing system of the present invention has a pad provided between the first cylinder and the connecting seat, the other end of the elastic member is squeezed and connected to the pad, a second through hole is provided in the center of the pad for the piston rod of the first cylinder and the first core shaft to pass through, and an air outlet hole connected to the second through hole is provided on the outer end face of the pad, which can ensure that the piston rod of the cylinder always maintains a constant driving force during long-term reciprocating motion and avoids the situation where the flange cannot be driven to seal the exhaust port due to holding of air. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attachment Figure 1 Schematic diagram of the structure of the vacuum generating mechanism of the dispensing system of the present invention;

[0019] Attachment Figure 2 Schematic diagram of the cross-sectional structure of the vacuum generating mechanism of the dispensing system of the present invention;

[0020] Attachment Figure 3 Schematic diagram of the structure of the pad in the vacuum generating mechanism of the dispensing system of the present invention Figure 1 ;

[0021] Attachment Figure 4 Schematic diagram of the structure of the pad in the vacuum generating mechanism of the dispensing system of the present invention Figure 2 .

[0022] In the above drawings: 1. Vacuum chamber body; 2. Exhaust port; 3. Air inlet; 4. Flange portion; 5. First flange; 6. Second flange; 7. First cylinder; 8. Second cylinder; 9. Connecting seat; 10. First core shaft; 101. Outer flange portion; 11. First through hole; 12. Exhaust hole; 13. Exhaust seat; 14. Elastic member; 15. Support washer; 16. Pad; 161. Main body; 162. Raised portion; 17. Second through hole; 18. Air outlet. DETAILED DESCRIPTION

[0023] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0024] Example 1: A vacuum generating mechanism of a dispensing system is installed on a vacuum chamber body 1, and an air extraction port 2 and two air inlet ports 3 are provided on the outer surface of one side of the vacuum chamber body 1. The air extraction port 2 and the air inlet port 3 each have a radially inwardly extending flange portion 4 on the inner wall near one end of the interior of the vacuum chamber body 1, a first flange 5 is embedded in the air extraction port 2, and a second flange 6 is embedded in the air inlet port 3, and the end surface of one end of each of the first flange 5 and the second flange 6 is in surface contact with the end surface of the corresponding flange portion 4, and the other end of each of the first flange 5 and the second flange 6 is connected to the piston rod of the corresponding first cylinder 7 and the second cylinder 8;

[0025] A connecting seat 9 is installed on the air extraction port 2, one end surface of the connecting seat 9 is connected to the vacuum chamber body 1, and the first cylinder 7 is installed on the other end surface of the connecting seat 9. The piston rod of the first cylinder 7 is connected to the first flange 5 via a first core shaft 10. A first through hole 11 communicating with the air extraction port 2 is provided on the connecting seat 9 along the direction of the first core shaft 10. The first core shaft 10 is telescopically arranged in the first through hole 11. The connecting seat 9 also has an air extraction hole 12 communicating with the first through hole 11, and the air extraction hole 12 is used to connect to the vacuum pump;

[0026] An elastic member 14 is mounted on the first core shaft 10. One end of the elastic member 14 close to the first flange 5 contacts the outer flange 101 located at the end of the first core shaft 10. The other end of the elastic member 14 is squeezed and connected to the housing of the first cylinder 7.

[0027] A cushion block 16 is provided between the first cylinder 7 and the connecting seat 9. The other end of the elastic member 14 is squeezed and connected to the cushion block 16. A second through hole 17 is provided in the center of the cushion block 16 for the piston rod of the first cylinder 7 and the first core shaft 10 to pass through. An air outlet 18 communicating with the second through hole 17 is provided on the outer end surface of the cushion block 16.

[0028] The outer diameter ratio between the two second flanges 6 respectively embedded in the two air inlets 3 is 5:2. When the vacuum chamber body 1 is in a pressure relief state, the second flange 6 with a smaller outer diameter is pulled out from the corresponding air inlet 3 by the second cylinder 8, and then the second flange 6 with a larger outer diameter is pulled out from the corresponding air inlet 3.

[0029] An exhaust seat 13 is installed on the exhaust hole 12.

[0030] The elastic member 14 is a bellows-shaped elastic member.

[0031] A supporting washer 15 is provided between the housing of the first cylinder 7 and the elastic member 14 . The supporting washer 15 is sleeved on the first core shaft 10 and is in press contact with the end face of the elastic member 14 .

[0032] An annular groove for embedding a sealing ring is formed on the end surface where the connecting seat 9 is connected to the vacuum chamber body 1 .

[0033] Example 2: A vacuum generating mechanism of a dispensing system is installed on a vacuum chamber body 1, and an air extraction port 2 and two air inlet ports 3 are provided on the outer surface of one side of the vacuum chamber body 1. The air extraction port 2 and the air inlet port 3 each have a radially inwardly extending flange portion 4 on the inner wall near one end of the interior of the vacuum chamber body 1, a first flange 5 is embedded in the air extraction port 2, and a second flange 6 is embedded in the air inlet port 3, and the end surface of one end of each of the first flange 5 and the second flange 6 is in surface contact with the end surface of the corresponding flange portion 4, and the other end of each of the first flange 5 and the second flange 6 is connected to the piston rod of the corresponding first cylinder 7 and the second cylinder 8;

[0034] A connecting seat 9 is installed on the air extraction port 2, one end surface of the connecting seat 9 is connected to the vacuum chamber body 1, and the first cylinder 7 is installed on the other end surface of the connecting seat 9. The piston rod of the first cylinder 7 is connected to the first flange 5 via a first core shaft 10. A first through hole 11 communicating with the air extraction port 2 is provided on the connecting seat 9 along the direction of the first core shaft 10. The first core shaft 10 is telescopically arranged in the first through hole 11. The connecting seat 9 also has an air extraction hole 12 communicating with the first through hole 11, and the air extraction hole 12 is used to connect to the vacuum pump;

[0035] An elastic member 14 is mounted on the first core shaft 10. One end of the elastic member 14 close to the first flange 5 contacts the outer flange 101 located at the end of the first core shaft 10. The other end of the elastic member 14 is squeezed and connected to the housing of the first cylinder 7.

[0036] A cushion block 16 is provided between the first cylinder 7 and the connecting seat 9. The other end of the elastic member 14 is squeezed and connected to the cushion block 16. A second through hole 17 is provided in the center of the cushion block 16 for the piston rod of the first cylinder 7 and the first core shaft 10 to pass through. An air outlet 18 communicating with the second through hole 17 is provided on the outer end surface of the cushion block 16.

[0037] The outer diameter ratio between the two second flanges 6 respectively embedded in the two air inlets 3 is 5:3. When the vacuum chamber body 1 is in a pressure relief state, the second flange 6 with a smaller outer diameter is pulled out from the corresponding air inlet 3 by the second cylinder 8, and then the second flange 6 with a larger outer diameter is pulled out from the corresponding air inlet 3.

[0038] The support washer 15 is fixedly disposed in the air extraction port 2 .

[0039] The cushion block 16 includes a main body 161 close to the first cylinder 7 and a protruding portion 162 embedded in the air extraction port 2 .

[0040] A screw passes through the first cylinder 7 and the pad 16 in sequence and connects to the connecting seat 9 , thereby installing the first cylinder 7 and the pad 16 on the connecting seat 9 .

[0041] Working principle:

[0042] The first cylinder drives the first flange to extend and retract to control the opening and closing of the air extraction passage, thereby controlling the vacuuming work in the vacuum chamber body;

[0043] The opening and closing of the intake air passage is controlled by driving the expansion and contraction of the second flange through two second cylinders, thereby controlling the air pressure change and slight air pressure change in the vacuum chamber respectively;

[0044] When the first cylinder pulls the first flange away from the air extraction port, the externally connected air pump starts working to extract air from the vacuum chamber;

[0045] When the air pressure in the vacuum chamber is greater than the preset value of the air pressure sensor installed thereon, the first cylinder pushes the first flange into the air extraction port;

[0046] Pull the second flange with a smaller outer diameter away from the air inlet and fine-tune the air pressure in the vacuum chamber until it reaches the preset value;

[0047] When the operation inside the vacuum chamber is completed, first pull the second flange with a smaller outer diameter away from the air inlet to slowly release the pressure. When the air pressure inside the vacuum chamber reaches the preset value, pull the second flange with a larger outer diameter away from the air inlet to completely release the pressure.

[0048] When this patent is adopted, the elastic member is provided to apply a superimposed force to the first flange when the first flange is closed, thereby improving the sealing performance of the first flange to the air extraction port during long-term use, and preventing the first flange from causing impact due to excessive contraction during opening, thereby extending the service life of the mechanism;

[0049] In addition, by coordinating the first flange with the two second flanges of different sizes, the vacuum chamber body can be evacuated and the air pressure in the vacuum chamber body can be precisely adjusted. The pressure can also be gradually released during the vacuum breaking process, thereby avoiding damage to products or equipment components caused by sudden changes in air pressure in the vacuum chamber body and preventing the second flange from being unable to be opened due to insufficient cylinder output power. This reduces the requirements for cylinder output power, saves energy, and reduces the impact load on the vacuum chamber body, thereby extending the service life of the equipment.

[0050] In addition, it can ensure that the piston rod of the cylinder always maintains a constant driving force during long-term reciprocating motion, avoiding the situation where the flange cannot be driven to seal the exhaust port due to holding of air.

[0051] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A vacuum generating mechanism for a dispensing system, characterized by: It is installed on a vacuum chamber body (1), and an air extraction port (2) and two air inlets (3) are provided on the outer surface of one side of the vacuum chamber body (1); the air extraction port (2) and the air inlet (3) each have a flange portion (4) extending radially inward on the inner wall near one end of the interior of the vacuum chamber body (1); a first flange (5) is embedded in the air extraction port (2), and a second flange (6) is embedded in the air inlet (3); the end face of each of the first flange (5) and the second flange (6) is in surface contact with the end face of the corresponding flange portion (4); the other end of each of the first flange (5) and the second flange (6) is connected to the piston rod of the corresponding first cylinder (7) and the second cylinder (8); A connecting seat (9) is installed on the exhaust port (2), one end face of the connecting seat (9) is connected to the vacuum chamber body (1), the first cylinder (7) is installed on the other end face of the connecting seat (9), the piston rod of the first cylinder (7) is connected to the first flange (5) through a first core shaft (10), a first through hole (11) connected to the exhaust port (2) is provided on the connecting seat (9) along the direction of the first core shaft (10), the first core shaft (10) is telescopically arranged in the first through hole (11), the connecting seat (9) is also provided with an exhaust hole (12) connected to the first through hole (11), an exhaust seat (13) is installed on the exhaust hole (12), and the exhaust hole (12) is used to be connected to a vacuum pump; An elastic member (14) is mounted on the first core shaft (10), one end of the elastic member (14) close to the first flange (5) contacts the outer flange portion (101) located at the end of the first core shaft (10), and the other end of the elastic member (14) is extrusion-connected to the housing of the first cylinder (7); A cushion block (16) is provided between the first cylinder (7) and the connecting seat (9), the other end of the elastic member (14) is squeezed and connected to the cushion block (16), the cushion block (16) comprises a main body (161) close to the first cylinder (7) and a raised portion (162) embedded in the air extraction port (2), a second through hole (17) for the piston rod of the first cylinder (7) and the first core shaft (10) to pass through is provided in the center of the cushion block (16), and an air outlet hole (18) communicating with the second through hole (17) is provided on the outer end surface of the cushion block (16); The outer diameter ratio of the two second flanges (6) respectively embedded in the two air inlets (3) is 5:2~3. When the vacuum chamber (1) is in a pressure relief state, the second flange (6) with a smaller outer diameter is first pulled out from the corresponding air inlet (3) by the second cylinder (8). When the air pressure in the vacuum chamber (1) reaches a preset value, the second flange (6) with a larger outer diameter is then pulled out from the corresponding air inlet (3).

2. The vacuum generating mechanism of the dispensing system according to claim 1, characterized in that: The elastic member (14) is a bellows-shaped elastic member.

3. The vacuum generating mechanism of the dispensing system according to claim 1, characterized in that: A supporting washer (15) is provided between the housing of the first cylinder (7) and the elastic member (14).

4. The vacuum generating mechanism of the dispensing system according to claim 3, characterized in that: The supporting washer (15) is sleeved on the first core shaft (10) and is in extrusion contact with the end surface of the elastic member (14).

5. The vacuum generating mechanism of the dispensing system according to claim 1, characterized in that: A screw passes through the first cylinder (7) and the pad (16) in sequence and is connected to the connecting seat (9), thereby installing the first cylinder (7) and the pad (16) on the connecting seat (9).

Images