Plunger driving mechanism and device using the same

Abstract

The present invention belongs to the technical field of sealing parts, and provides a plunger driving mechanism and device, wherein the plunger driving mechanism includes a plunger body for opening / blocking a container opening, a pneumatic channel being provided on the plunger body, a pressure relief sealing head being provided in the plunger body and being movable for opening / sealing the pneumatic channel, the pressure relief sealing head being connected to a pressure relief rod, the pressure relief rod extending out of the plunger body and connected to a driving assembly and being driven by the driving assembly to move up and down. In the present invention, a pneumatic channel connected to the container is provided on the plunger body, a pressure relief sealing head is directly provided in the plunger, and the pressure relief rod is driven by the driving assembly to move to drive the pressure relief sealing head and the pressure relief rod to move to open / seal the pneumatic channel and realize opening / blocking the container opening. In this way, one driving assembly drives the two components to move to realize material taking and pressure relief operations respectively, and there is no need to additionally provide a pressure relief port and install a pressure relief part on the container. The structure is compact, the reliability is higher, and the application is wider.

Description

Technical Field

[0001] The invention belongs to the technical field of sealing elements, and in particular relates to a plunger driving mechanism and a device using the plunger driving mechanism. Background Art

[0002] At present, some containers or storage equipment are provided with automatic discharge ports, and the automatic discharge ports are often opened or closed by a plunger driven by a motor. Due to the high storage conditions of some materials, it is necessary to evacuate the container or storage equipment after the plunger closes the discharge port. In this way, due to the large negative pressure inside the container or storage equipment, it is generally difficult to directly pull out the plunger to open the discharge port when opening the discharge port again. It is necessary to set a pressure relief port on the container or storage equipment, and set a pressure relief valve at the pressure relief port. First, the pressure is relieved through the pressure relief valve and then the plunger is pulled out. This structure, because it is necessary to set up a pressure relief port separately, on the one hand, increases the sealing cost and makes the structure more complicated. On the other hand, it may be difficult to implement due to the limitation of the setting space. Moreover, the pressure relief and the plunger are driven by different driving mechanisms, which makes the structure more complicated and costly. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide a plunger driving mechanism and a device using the plunger driving mechanism to solve the technical problems in the prior art that the plunger and the pressure relief are driven by different driving mechanisms respectively, resulting in complex structure and high cost.

[0004] The present invention is implemented in this way, providing a plunger driving mechanism, including a plunger body for opening / closing a container opening, the plunger body being provided with an air pressure channel connected to the container, the plunger body being provided with a movable pressure relief sealing head for opening / sealing the air pressure channel, the pressure relief sealing head being connected to a pressure relief rod, the pressure relief rod extending out of the plunger body and connected to a driving assembly and moving up and down under the drive of the driving assembly.

[0005] Furthermore, the driving assembly includes a servo motor, a gear connected to the output shaft of the servo motor, and a driving seat fixedly connected to the pressure relief rod, the driving seat is provided with a rack, and the gear is meshed with the rack.

[0006] Furthermore, a connecting groove is provided on one side of the driving seat, the end of the pressure relief rod is inserted and fixed in the connecting groove, and the rack is provided on the other side opposite to the connecting groove.

[0007] Furthermore, the cross-section of the connecting groove is semicircular, the radius of the semicircular connecting groove is the same as the cross-sectional radius of the pressure relief rod, and a connecting hole is provided at the end of the connecting groove, and the end of the pressure relief rod extends into the connecting hole and is locked and fixed by a locking piece.

[0008] Furthermore, a cavity is provided on the other side surface of the driving seat opposite to the connecting groove, and there are two racks, which are respectively provided on two opposite side walls of the cavity.

[0009] Furthermore, guide rings which can be passed through two external guide rods are respectively provided on both sides of the driving seat.

[0010] Furthermore, it also includes two springs, the two springs are respectively sleeved on the two external guide rods, and the ends of the external guide rods are respectively provided with fixing parts to fix the springs.

[0011] Furthermore, the pressure relief rod includes a first rod body and a fixing seat arranged at one end of the first rod body, the fixing seat has a accommodating cavity, the pressure relief sealing head is arranged in the fixing seat and the pressure relief sealing head partially extends out of the fixing seat.

[0012] Alternatively, the driving assembly is a solenoid valve assembly capable of pushing the pressure relief rod.

[0013] The present invention also provides a device using a plunger driving mechanism, comprising a container for storing materials, wherein the container has an opening, and the above-mentioned plunger driving mechanism is arranged at the opening.

[0014] The beneficial effects of the present invention are as follows: in the present invention, an air pressure channel connected to the container is arranged on the plunger body, and a pressure relief sealing head is directly arranged in the plunger body, and the pressure relief rod is driven to move by the driving component to drive the pressure relief sealing head to open / seal the air pressure channel. At the same time, the movement of the pressure relief rod also drives the movement of the plunger body, and the movement of the plunger body simultaneously realizes the opening / blocking of the container. In this way, one driving component drives the movement of the two components to respectively realize the material taking and pressure relief operations, and there is no need to additionally set a pressure relief port and install a pressure relief part on the container. This kind of parts is centralized, the structure is compact, the reliability is higher, and the application is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an exploded view of a plunger drive mechanism provided by an embodiment of the present invention;

[0016] Figure 2 is a longitudinal cross-sectional view at an angle of the plunger drive mechanism provided by an embodiment of the present invention;

[0017] Figure 3 is a longitudinal cross-sectional view from another angle of the plunger body in the plunger drive mechanism provided by an embodiment of the present invention;

[0018] Figure 4 is a cross-sectional view of a device provided by an embodiment of the present invention;

[0019] A-air pressure channel; 1-plunger body; 13-activity space; 10-pressure relief assembly; 11-pressure relief rod; 111-first rod body; 112-fixed seat; 113-first center hole; 12-pressure relief sealing head; 121-sealing end; 122-connecting end; 20-valve guide rod; 21-second rod body; 22-mounting seat; 221-pressure relief hole; 23-second center hole; 24-mounting cavity; 25-stop wall; 30-valve seat; 31-seat body; 32-boss; 33-ring shaped mounting groove; 34-mounting groove; 35-third center hole; 36-sealing port; 37-mounting plate; 40-valve cover; 41-top cover; 42-support column; 43-air flow port; 50-sealing ring; 60-device; 61-container; 62-opening; 70-drive assembly; 71-servo motor; 72-gear; 73-drive seat; 731-rack; 732-connecting groove; 733-connecting hole; 734-cavity; 735-guide ring; 736-locking piece; 74-spring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] Reference Figures 1 to 4 A plunger driving mechanism provided by an embodiment of the present invention includes a plunger body 1 for opening / closing a container opening, the plunger body 1 is provided with an air pressure channel A for connecting the outside of the container with the inside of the container, the plunger body 1 is provided with a movable pressure relief sealing head 12 for opening / sealing the air pressure channel A, the pressure relief sealing head 12 is connected to a pressure relief rod 11, the pressure relief rod 11 extends out of the plunger body 1 and is connected to a driving assembly 70 and moves up and down under the drive of the driving assembly 70.

[0022] In this embodiment, the opening can be a discharge port, a feed port or any other opening for connecting the outside and the inside of the container. A gas pressure channel A connected to the container is provided on the plunger body 1, and a pressure relief sealing head 12 is directly provided in the plunger body 1. The pressure relief rod 11 is driven by the driving component 70 to move to drive the pressure relief sealing head 12 to open / seal the gas pressure channel A. At the same time, the movement of the pressure relief rod 11 also drives the plunger body 1 to move. The movement of the plunger body 1 simultaneously realizes the opening of the container to be opened / blocked. In this way, one driving component 70 drives the two components to move to respectively realize the material taking and pressure relief operations. , there is no need to set up additional pressure relief ports and install pressure relief parts on the container. This kind of parts are centralized, compact in structure, more reliable and more widely used. After the container opening in this embodiment is sealed, in order to extend the storage time of the materials in the container and reduce the oxidation or other effects of air on the materials in the container, the inside of the container can be vacuumed with the help of a vacuum pumping device, so as to ensure that the inside of the sealed container is in a negative pressure state. Therefore, the pressure relief in this embodiment specifically refers to the release of the negative pressure in the container, that is, to allow the air outside the container to enter the container, so that the pressure outside and inside the container tend to balance. The pressure relief rod 11 and the pressure relief sealing head 12 are combined to form a pressure relief assembly 10. The pressure relief assembly 10 opens / seals the air pressure channel A mainly to open / seal the channel for the air outside the container to enter the container, thereby achieving pressure relief / blocking of the container.

[0023] In this embodiment, the driving assembly 70 includes a servo motor 71, a gear 72 connected to the output shaft of the servo motor 71, and a driving seat 73 fixedly connected to the pressure relief rod 11. The driving seat 73 is provided with a rack 731, and the gear 72 is meshed with the rack 731. When the servo motor 71 is working, it drives the gear 72 to rotate. When the gear 72 rotates forward and reversely, it drives the rack 731 meshed with it to move upward or downward, thereby driving the driving seat 73 and the pressure relief rod 11 to move upward or downward, and then driving the pressure relief sealing head 12 and the plunger body 1 to move upward or downward.

[0024] The driving seat 73 has two opposite side surfaces, one of which is provided with a connecting groove 732, and the end of the pressure relief rod 11 is inserted and fixed in the connecting groove 732, while the rack 731 is provided on the other side surface. Specifically, the cross section of the connecting groove 732 is semicircular, and the radius of the semicircular connecting groove 732 is the same as the cross-sectional radius of the pressure relief rod 11, so that the pressure relief rod 11 fits more closely with the connecting groove 732 when inserted, and the end of the connecting groove 732 is provided with a connecting hole 733, and the end of the pressure relief rod 11 extends from the connecting groove 732 into the connecting hole 733, and the locking member 736 such as a screw extends from the other side of the connecting hole 733 and is inserted into the pressure relief rod 11 to achieve locking and fixing.

[0025] Furthermore, a cavity 734 is provided on the other side of the drive seat 73 opposite to the connecting groove 732, and two racks 731 are respectively provided on the two opposite side walls of the cavity 734. The two racks 731 are meshed with the gear 72 at the same time, so that the gear 72 drives the drive seat 73 to move up and down and translate.

[0026] In order to further improve the movement stability of the drive seat 73, guide rings 735 are respectively provided on both sides of the drive seat 73. During installation, the two guide rings 735 are respectively sleeved on two external guide rods (not shown in the figure). In this way, the guide rods limit the guide rings 735 to prevent the drive seat 73 from shaking left and right when moving, thereby making the movement of the pressure relief rod 11 and the plunger body 1 more stable and reliable.

[0027] Of course, as an alternative, the above-mentioned driving assembly 70 can also be replaced by an electromagnetic valve assembly. The electromagnetic assembly is used to push the pressure relief rod 11 to move, thereby realizing the material taking and pressure relief operations.

[0028] Furthermore, in this embodiment, the plunger drive mechanism further includes two springs 74, which are respectively sleeved on two external guide rods, and the ends of the external guide rods are respectively provided with fixing pieces to fix the springs 74. In this way, when the guide ring 735 moves downward along the external guide rod, the spring 74 is compressed, and when the pressure relief rod 11 and the plunger body 1 move upward to seal, the spring 74 uses its elastic effect to push upward to enhance the pressure against the plunger body 1 and the container opening position, so that the seal is tighter and the effect is better.

[0029] In this embodiment, the pressure relief rod 11 includes a first rod body 111 and a fixing seat 112 disposed at one end of the first rod body 111, the fixing seat 112 has a receiving cavity, the pressure relief sealing head 12 is disposed in the fixing seat 112 and the pressure relief sealing head 12 partially extends out of the fixing seat 112. The fixing seat 112 is provided to realize a fixed connection between the pressure relief sealing head 12 and the first rod body 111, and the pressure relief sealing head 12 partially extends out of the fixing seat 112, and the extended portion is used to seal / open the air pressure channel A.

[0030] More specifically, the first rod body 111 is provided with a first central hole 113 along its length, and the first central hole 113 is connected to the accommodating cavity. The pressure relief sealing head 12 includes a sealing end 121 and a connecting end 122 connected to each other, the sealing end 121 is located in the accommodating cavity and partially extends out of the accommodating cavity for sealing, and the connecting end 122 extends into the first central hole 113 to play a connecting role, and the connecting end 122 is fixed to the first rod body 111 to prevent the sealing end 121 from slipping out of the accommodating cavity. Of course, the first rod body 111 and the pressure relief sealing head 12 can also adopt other connection structures.

[0031] Specifically, in this embodiment, the plunger body 1 includes a valve guide rod 20, a valve seat 30 and a valve cover 40. Figures 1 to 3 Describe the structure of each part in detail.

[0032] The valve guide rod 20 includes a second rod body 21 and a mounting seat 22 disposed at one end of the second rod body 21. The mounting seat 22 has a mounting cavity. The second rod body 21 is provided with a second center hole 23. The second center hole 23 is connected to the mounting cavity 24 to form a vertically penetrating passage. The side wall of the mounting seat 22 is provided with a pressure relief hole 221 connected to the passage. There are multiple pressure relief holes 221, and the multiple pressure relief holes 221 are evenly distributed along the inner wall of the mounting cavity 24 and extend through the outer wall of the mounting seat 22. In this way, the pressure relief hole 221 is connected to the external atmosphere to facilitate pressure relief. At the same time, a stop wall 25 is provided in the mounting cavity 24, and the stop wall 25 is also the bottom wall of the mounting cavity 24.

[0033] Reference Figure 1 The valve seat 30 includes a seat body 31 which is truncated cone-shaped as a whole and a boss 32 arranged on the top of the seat body 31. The top of the seat body 31 is recessed inward to form a circular groove, and the boss 32 is located in the middle of the circular groove. There is a gap between the boss 32 and the inner wall of the circular groove to form an annular mounting groove 33. Figure 2 The bottom of the seat body 31 is provided with a mounting groove 34, and the boss 32 is provided with a third center hole 35 that passes through the mounting groove 34. The diameter of the mounting groove 34 is larger than the diameter of the third center hole 35. In this way, a stepped hole is formed in the valve seat 30. The third center hole 35 is the upper part of the stepped hole. The top of the boss 32 is provided with a sealing port 36, which is connected to the third center hole 35.

[0034] Since the bottom of the seat body 31 is circular, the bottom of the seat body 31 extends to the edge to form a circular mounting plate 37, and a sealing ring 50 is sleeved on the seat body 31. The shape of the sealing ring 50 is basically the same as that of the seat body 31. The sealing ring 50 is sleeved on the seat body 31 and then placed on the mounting plate 37. The sealing ring 50 is arranged here, and the plunger body 1 uses this sealing ring 50 to block the container opening when moving up and down.

[0035] refer to Figure 1 The valve cover 40 includes a conical top cover 41 and a plurality of support columns 42 extending downward from the bottom of the top cover 41 . A plurality of air flow openings 43 are provided at the edge of the top cover 41 , and an air duct is formed between the plurality of air flow openings 43 and the top cover 41 .

[0036] During installation, firstly, the pressure relief sealing head 12 is installed on the first rod body 111 to form the pressure relief rod 11, and then the assembled pressure relief rod 11 is inserted into the upper part of the channel through the installation groove 34 of the seat body 31, and then the valve guide rod 20 is sleeved on the first rod body 111 and installed at the installation groove 34, and then the sealing ring 50 is sleeved on the seat body 31, and finally the valve cover 40 is installed on the seat body 31. During installation, the multiple support columns 42 of the valve cover 40 are inserted into the annular installation groove 33 at the top of the seat body 31, and the top cover 41 is covered outside the annular installation groove 33. After installation, the air duct of the valve cover 40, the step hole of the valve seat 30, the channel of the valve guide rod 20 and the pressure relief hole 221 are connected to form the above-mentioned air pressure channel A. The sealing port 36 is located between the upper part of the channel and the air duct, that is, it is also located above the pressure relief sealing head 12. An activity space 13 is formed between the upper part of the hole and the stop wall 25, and the first rod body 111 drives the fixed seat 112 to move up and down in the activity space 13. When the first rod body 111 moves downward under the drive of the external driving mechanism, the pressure relief sealing head 12 moves downward to open the sealing port 36. At this time, the air pressure channel A is connected, and the external air enters the container, thereby balancing the pressure difference between the inside and outside of the container, so that the internal and external pressures of the container tend to be balanced, and the first rod body 111 continues to move downward and is limited by the stop wall 25, driving the entire plunger body 1 to move downward, and the plunger body 1 moves downward to easily open the container opening; when the first rod body 111 moves upward under the drive of the external driving mechanism, the pressure relief sealing head 12 moves upward to block the sealing port 36. At this time, the air pressure channel A is blocked, and the first rod body 111 continues to move upward and is limited by the top of the activity space 13, driving the entire plunger body 1 to move upward, and the plunger body 1 moves upward to easily block the container opening. At this time, the container is sealed, and the vacuum equipment can be started to perform a vacuum operation.

[0037] In the present embodiment, the driving mechanism drives the pressure relief rod 11 to move in the same direction as the plunger body 1. When the pressure relief rod 11 seals the air pressure channel A, it drives the plunger body 1 to move toward the opening, thereby facilitating the blocking of the container opening. When the pressure relief rod 11 opens the air pressure channel A, the outside and the inside of the container are connected, and the pressures between the outside and the inside of the container are consistent, thereby making it easy to move the plunger body 1 out of the opening position, thereby facilitating the opening of the container. In this way, two functions are completed with the aid of one driving mechanism, which is very convenient, saves installation space, has low cost, compact structure, and higher reliability.

[0038] The embodiment of the present invention also provides a device 60 using a plunger driving mechanism, which includes a container 61 for storing materials, the container 61 has an opening 62, and the above-mentioned plunger driving mechanism is provided at the opening 62. Through the above-mentioned plunger driving mechanism, the plunger body 1 and the pressure relief rod 11 are driven simultaneously to complete the sealing of the container opening and the pressure relief of the container. There is no need to additionally set a pressure relief port and install a pressure relief part on the container, and there is no need for two driving mechanisms. The cost is low, the structure is compact, and the reliability is higher.

[0039] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A plunger driving mechanism, comprising a plunger body, characterized in that: The plunger body is provided with an air pressure channel for connecting the outside of the container with the inside of the container, the plunger driving mechanism also includes a pressure relief sealing head for opening / sealing the air pressure channel, a pressure relief rod slidably arranged in the plunger body, and a driving assembly for driving the pressure relief rod to slide, the pressure relief sealing head is movably arranged in the plunger body, one end of the pressure relief rod is connected to the pressure relief sealing head, the other end of the pressure relief rod extends out of the plunger body, and the driving assembly is connected to the end of the pressure relief rod extending out of the plunger body; The pressure relief rod comprises a first rod body and a fixing seat arranged at one end of the first rod body, the fixing seat has a containing cavity, the pressure relief sealing head is arranged in the fixing seat and the pressure relief sealing head partially extends out of the fixing seat; The first rod body is provided with a first central hole along its length direction, and the first central hole is communicated with the accommodating cavity; the pressure relief sealing head comprises a sealing end and a connecting end connected to each other, the sealing end is located in the accommodating cavity and partially extends out of the accommodating cavity, and the connecting end extends into the first central hole, and the connecting end is fixed to the first rod body; The plunger body includes a valve guide rod, a valve seat and a valve cover; The valve guide rod comprises a second rod body and a mounting seat arranged at one end of the second rod body, the mounting seat has a mounting cavity, the second rod body is provided with a second center hole, the second center hole is connected with the mounting cavity to form a vertically penetrating passage; the side wall of the mounting seat is provided with a pressure relief hole connected with the passage; there are a plurality of pressure relief holes, the plurality of pressure relief holes are evenly distributed along the inner wall of the mounting cavity and extend through the outer wall of the mounting seat; there is a stop wall in the mounting cavity, the stop wall is also the bottom wall of the mounting cavity; The valve seat comprises a seat body which is in the shape of a truncated cone as a whole and a boss arranged on the top of the seat body; the top of the seat body is recessed inward to form a circular groove, the boss is located in the middle of the circular groove, and a gap is provided between the boss and the inner wall of the circular groove to form an annular mounting groove; a mounting groove is provided at the bottom of the seat body, a third center hole which passes through the mounting groove is provided in the boss, the aperture of the mounting groove is larger than the aperture of the third center hole, and a step hole is formed in the valve seat; the third center hole portion is the upper part of the step hole; a sealing port is provided on the top of the boss, and the sealing port is connected to the third center hole; The bottom of the seat body is circular, and the bottom of the seat body extends to the edge to form a circular mounting plate. A sealing ring is sleeved on the seat body, and the shape of the sealing ring is substantially the same as that of the seat body. The sealing ring is sleeved on the seat body and then placed on the mounting plate; the plunger body uses the sealing ring to block the container opening when moving up and down; The valve cover comprises a conical top cover and a plurality of support columns extending downward from the bottom of the top cover. The edge of the top cover is provided with a plurality of air flow openings, and an air duct is formed between the plurality of air flow openings and the top cover.

2. The plunger drive mechanism according to claim 1, characterized in that: The driving assembly includes a servo motor, a gear connected to the output shaft of the servo motor, and a driving seat fixedly connected to the pressure relief rod. A rack is provided on the driving seat, and the gear is meshed with the rack.

3. The plunger drive mechanism according to claim 2, characterized in that: A connecting groove is provided on one side of the driving seat, the end of the pressure relief rod is inserted and fixed in the connecting groove, and the rack is provided on the other side opposite to the connecting groove.

4. The plunger drive mechanism according to claim 3, characterized in that: The cross section of the connecting groove is semicircular, the radius of the semicircular connecting groove is the same as the cross-sectional radius of the pressure relief rod, and a connecting hole is provided at the end of the connecting groove. The end of the pressure relief rod extends into the connecting hole and is locked and fixed by a locking piece.

5. The plunger drive mechanism according to claim 3, characterized in that: A cavity is provided on the other side surface of the driving seat opposite to the connecting groove, and there are two racks, which are respectively provided on two opposite side walls of the cavity.

6. The plunger drive mechanism according to any one of claims 2 to 5, characterized in that: Guide rings which can be passed through two external guide rods are respectively arranged on both sides of the driving seat.

7. The plunger drive mechanism according to claim 6, characterized in that: It also includes two springs, which are respectively sleeved on the two external guide rods, and the ends of the external guide rods are respectively provided with fixing pieces to fix the springs.

8. The plunger drive mechanism according to claim 1, characterized in that: The driving assembly is a solenoid valve assembly capable of pushing the pressure relief rod.

9. A device using a plunger drive mechanism, comprising a container for storing material, the container having an opening, characterized in that: The opening is provided with a plunger driving mechanism as claimed in any one of claims 1 to 8.

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