Adjustable sub-vacuum negative pressure generating device

Abstract

The utility model relates to the field of vacuum technology discloses a kind of adjustable sub-vacuum negative pressure generating device. Including: negative pressure bottle, negative pressure bottle is the vacuum device bottle that can be extracted, top is equipped with wheel disc cover;Wheel disc cover is cylindrical, and has been placed slot in side edge, rotating stick moves in the placement slot;Bung is located in wheel disc cover top;Connecting pipe, one end passes through bung, other end is connected with air extractor;Suction pipe, one end passes through bung, other end is connected with the required vacuumization device. Rotating stick moves in the placement slot of wheel disc cover drives rotatable wheel to rotate, cooperates fixed pin to limit sliding slot moving distance, so that connecting rod drives contraction piece to slide in T-shaped groove, adjust the gas extraction amount of inner diameter control hose, realize the adjustability of negative pressure generating device.

Description

Technical Field

[0001] This utility model relates to the field of vacuum technology, specifically to an adjustable sub-vacuum negative pressure generating device. Background Technology

[0002] A search revealed that existing sub-vacuum negative pressure generating devices are widely used in laboratories, industrial production, and other scenarios in the field of vacuum technology. However, most existing devices have significant shortcomings: First, the negative pressure adjustment method is singular, with some devices relying solely on the knob of the pump for coarse adjustment, making it difficult to meet the precise negative pressure requirements of high-precision experiments or special processes; second, flow control is inconvenient, and the gas extraction rate cannot be flexibly changed, lacking adaptability when dealing with equipment of different volumes or with special requirements for pumping speed. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing an adjustable subvacuum negative pressure generating device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an adjustable sub-vacuum negative pressure generating device, comprising: a negative pressure bottle, which is a vacuum device bottle that can be detached, and a wheel cover is mounted on top; the wheel cover is cylindrical and has a placement groove on its side, in which a rotating rod moves; a bottle stopper located above the wheel cover; a connecting pipe, one end of which passes through the bottle stopper and the other end of which is connected to a vacuum pump; and a vacuum pipe, one end of which passes through the bottle stopper and the other end of which is connected to the required vacuum device.

[0005] As a further description of the above technical solution:

[0006] The wheel cover also contains a chassis, the bottom of which is connected to the bottom of the inner wall of the wheel cover. A rotatable wheel is mounted on top of the chassis and is rotatably connected to the chassis.

[0007] As a further description of the above technical solution:

[0008] The rotating disc and the chassis have cylindrical grooves inside, and the flexible hose runs through the grooves.

[0009] As a further description of the above technical solution:

[0010] The bottle stopper can be inserted into the tube.

[0011] As a further description of the above technical solution:

[0012] The rotatable disc includes: a bolt groove located on the outer side above the rotatable disc, through which a bolt passes through a threaded connection to the disc cover and is inserted; a sliding groove, which is an arc-shaped groove, with several evenly distributed above the rotatable disc; a fixing pin located inside the sliding groove, with its bottom fixed to the base, which can limit the maximum movement distance of the sliding groove; and a connecting rod, one end of which is rotatably connected to the rotatable disc, and the other end of which is rotatably connected to the shrink sheet via a cylindrical pin.

[0013] As a further description of the above technical solution:

[0014] The rotatable disc further includes: shrinkage sheets, evenly arranged in the groove, in several groups; and T-shaped grooves, evenly arranged in the groove, with the shrinkage sheets slidably connected in the T-shaped grooves.

[0015] As a further description of the above technical solution:

[0016] The vacuum pump includes: an indicator fixed on top of the vacuum pump; a negative pressure adjustment knob located on the front of the vacuum pump, which can be rotated left and right to adjust the air pressure; and a switch located on one side of the vacuum pump.

[0017] This utility model has the following beneficial effects:

[0018] 1. Adjustable negative pressure: The rotating rod moves within the groove of the wheel cover, causing the rotatable wheel to rotate. The fixed pin restricts the movement distance of the sliding groove, allowing the connecting rod to drive the shrink plate to slide within the T-groove. This adjusts the inner diameter of the hose to control the amount of gas extracted, thus achieving the adjustability of the negative pressure generating device.

[0019] 2. Precise control: The vacuum pump is equipped with an indicator, a negative pressure adjustment knob and a switch. The air pressure can be adjusted by rotating the knob left and right and displayed on the indicator. Combined with the adjustment of the inner diameter of the hose by the rotating disc, precise control of negative pressure can be achieved. Attached Figure Description

[0020] Fig. 1 This is a three-dimensional schematic diagram of the overall appearance of an adjustable subvacuum negative pressure generating device proposed in this utility model.

[0021] Fig. 2 This is an overall exploded view of an adjustable subvacuum negative pressure generating device proposed in this utility model.

[0022] Fig. 3 This is a diagram of the internal structure of the rotatable disc proposed in this utility model.

[0023] Legend:

[0024] 1. Negative pressure bottle; 2. Wheel cover; 201. Rotatable wheel; 202. Base; 20. Cylindrical groove; 21. Hose; 22. Bolt groove; 23. Sliding groove; 24. Fixing pin; 25. Connecting rod; 26. Cylindrical pin; 27. Shrink sheet; 28. Groove; 29. ​​T-slot; 3. Placement slot; 4. Rotating rod; 5. Bolt; 6. Bottle stopper; 71. Connecting pipe; 72. Vacuum pipe; 8. Vacuum pump; 9. Indicator; 10. Negative pressure adjustment knob; 11. Switch. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The utility model will be further described in detail below with reference to the accompanying drawings.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Example 1:

[0029] like Figs. 1 to 3As shown, this embodiment provides an adjustable sub-vacuum negative pressure generating device, comprising: a negative pressure bottle 1, which is a detachable vacuum device bottle, with a wheel cover 2 mounted on top; the wheel cover 2 is cylindrical and has a placement groove 3 on its side, and a rotating rod 4 moves within the placement groove 3; a bottle stopper 6 is located above the wheel cover 2; a connecting pipe 71, one end of which passes through the bottle stopper 6 and the other end is connected to a vacuum pump 8; and a vacuum pipe 72, one end of which passes through the bottle stopper 6 and the other end is connected to the required vacuum device.

[0030] In this embodiment, the rotatable disk 201 constitutes an adjustable subvacuum negative pressure generating device according to this application.

[0031] It should also be understood that supplementing the existing technical operating principles or writing the flow meter 241 and display 242 are common knowledge in the field. They are only used and not modified, so the control method and circuit connection will not be described in detail.

[0032] In this embodiment, the user closes the bottle stopper 6, connects the suction tube 72 to the required vacuuming device, and presses the switch 11 to turn on the vacuum pump 8. At this time, the air in the connected device is drawn out through the suction tube 72 into the negative pressure bottle 1. The negative pressure adjustment knob 10 is rotated to adjust the pressure to a suitable value. Then, the bolt 5 is loosened and pulled out. The rotating rod 4 is gently pushed to make the rotatable disc 201 rotate. The fixing pin 24 restricts the position and movement distance of the sliding groove 23. The connecting rod 25 twists to drive the shrink plate 27 to slide in the T-groove 29. The ring formed by several cylindrical pins 26 can be enlarged or reduced at will to control the inner diameter of the hose 21 from being too small, thereby controlling the amount of gas extracted. After adjusting to a suitable position, the bolt 5 is screwed in to fix the rotatable disc 201, thus fixing the position of the shrink plate 27 until the gas is extracted. After the extraction is completed, the user presses the switch 11 to turn off the vacuum pump 8, loosens the bolt 5 to push the rotating rod 4 back to its original position, and pulls out the suction tube 72.

[0033] Specifically, the wheel cover 2 also contains a chassis 202. The bottom of the chassis 202 is connected to the bottom of the inner wall of the wheel cover 2. A rotatable wheel 201 is provided above the chassis 202, and the rotatable wheel 201 is rotatably connected to the chassis 202.

[0034] In this embodiment, a chassis 202 is installed inside the wheel cover 2. The bottom of the chassis 202 is welded to the bottom of the inner wall of the wheel cover 2. A rotatable wheel 201 is provided above the chassis 202. The rotatable wheel 201 is rotatably connected to the chassis 202 via a central shaft. The rotatable wheel 201 can rotate on the chassis 202, providing a foundation for the adjustment mechanism.

[0035] Specifically, the rotatable disc 201 and the chassis 202 have cylindrical grooves 20 inside, and the flexible hose 21 passes through the grooves.

[0036] In a preferred embodiment, a cylindrical groove 20 is formed inside the rotatable disc 201 and the chassis 202, and a flexible hose 21 can be inserted into the cylindrical groove 20. The flexible hose 21 passes through the cylindrical groove 20 to form a gas channel, which can be squeezed and adjusted by an external mechanism. This provides a flexible channel for gas flow, facilitating flow rate adjustment.

[0037] Example 2:

[0038] Based on Example 1, in order to further improve the sealing effect, a bottle stopper 6 is arranged inside the hose 21;

[0039] Specifically, the bottle stopper 6 can be inserted into the tubing 21.

[0040] In this embodiment, the bottom of the bottle stopper 6 can be tightly inserted into the opening at the top of the hose 21. The insertion of the bottle stopper 6 into the hose 21 achieves a seal, preventing gas leakage. This enhances the device's sealing performance and ensures efficient gas extraction.

[0041] Specifically, the rotatable disc 201 includes: a bolt 5 slot located on the outer side above the rotatable disc 201, through which the bolt 5 passes and is inserted into the threaded disc cover 2; a sliding groove 23, which is an arc-shaped groove, with several evenly distributed above the rotatable disc 201; a fixing pin 24 located inside the sliding groove 23, with its bottom fixed to the base 202, which can limit the maximum movement distance of the sliding groove 23; and a connecting rod 25, one end of which is rotatably connected to the rotatable disc 201, and the other end of which is rotatably connected to the shrink plate 27 via a cylindrical pin 26.

[0042] With this configuration, the rotatable disc 201 includes: a bolt groove 22 located on the outer edge of the rotatable disc 201, with a bolt 5 penetrating the disc cover 2 and inserted into the bolt groove; several arc-shaped sliding grooves 23 evenly distributed above the rotatable disc 201; a fixing pin 24 located within the sliding groove 23, its bottom welded to the base 202; and a connecting rod 25, one end of which is rotatably connected to the top of the rotatable disc 201 via a pin, and the other end of which is rotatably connected to the shrink plate 27 via a cylindrical pin 26. Loosening the bolt 5 and pulling it out pushes the 4 to rotate the rotatable disc 201, causing the fixing pin 24 to move within the sliding groove 23, limiting the rotation angle, and the connecting rod 25 to move the shrink plate 27. Rotating the rotatable disc 201 drives the shrink plate 27, providing power for adjusting the inner diameter of the hose 21.

[0043] Example 3:

[0044] Based on Example 2, in order to determine the displacement of the shrink sheet 27, a T-groove 29 is provided in the groove 28;

[0045] Specifically, the rotatable wheel 201 further includes: shrink sheet 27, which is evenly arranged in the groove 28 in several groups; and T-shaped groove 29, which is evenly arranged in the groove 28, and the shrink sheet 27 is slidably connected in the T-shaped groove 29.

[0046] The rotatable disc 201 further includes: several shrink plates 27 evenly arranged in the groove 28; T-slots 29 evenly arranged in the groove 28, with the top of the shrink plates 27 inserted into the T-slots 29 via 26 and able to slide. The connecting rod 25 drives the shrink plates 27 to slide within the T-slots 29, compressing or releasing the hose 21. The inner diameter of the hose 21 is adjusted by sliding the shrink plates 27, controlling the gas flow rate.

[0047] Specifically, the vacuum pump 8 includes: an indicator 9 fixed above the vacuum pump 8; a negative pressure adjustment knob 10 located on the front of the vacuum pump 8, which can be rotated left and right to adjust the air pressure; and a switch 11 located on one side of the vacuum pump 8.

[0048] In this embodiment, the vacuum pump 8 includes: an indicator 9 fixed to the top of the vacuum pump 8; a negative pressure adjustment knob 10 located in the center of the front of the vacuum pump 8, which can rotate left and right; and a switch 11 located on the right side of the vacuum pump 8. Pressing the switch 11 starts the vacuum pump 8, rotating the negative pressure adjustment knob 10 sets the target negative pressure, and the indicator 9 displays the real-time air pressure. This provides vacuuming power and enables the adjustment and display of the negative pressure value.

[0049] In actual use, the user closes the bottle stopper 6, connects the suction tube 72 to the required vacuum device, and presses the switch 11 to turn on the vacuum pump 8. At this time, the air in the connected device is drawn out through the suction tube 72 into the negative pressure bottle 1. The negative pressure adjustment knob 10 is rotated to adjust the pressure to a suitable value. Then, the bolt 5 is loosened and pulled out. The rotating rod 4 is gently pushed to make the rotatable wheel 201 rotate. The fixing pin 24 restricts the position and movement distance of the sliding groove 23. The connecting rod 25 is twisted to drive the shrink plate 27 to slide in the T-slot 29. The ring formed by several cylindrical pins 26 can be enlarged or reduced at will to control the inner diameter of the hose 21. If it is too small, the amount of gas extracted is controlled. After adjusting to a suitable position, the bolt 5 is screwed in to fix the rotatable wheel 201, thus fixing the position of the shrink plate 27 until the gas is extracted. After the extraction is completed, the user presses the switch 11 to turn off the vacuum pump 8, loosens the bolt 5 to push the rotating rod 4 back to its original position, and pulls out the suction tube 72.

[0050] It should be noted that all electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. The main controller can be a conventional known device that can be controlled by a computer or other means. The detailed description of known functions and known components is omitted in the specific implementation of this disclosure. In order to ensure the compatibility of the device, the operating methods used are consistent with the parameters of commercially available instruments.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustable sub-vacuum negative pressure generating device, characterized in that: Negative pressure bottle (1), negative pressure bottle (1) is a vacuum device bottle that can be removed, and a wheel cover (2) is installed on the top; The wheel cover (2) is a cylinder with a placement groove (3) on the side, and the rotating rod (4) moves in the placement groove (3); Bottle stopper (6) is located above wheel cover (2); connecting tube (71) passes through bottle stopper (6) at one end and is connected to vacuum pump (8) at the other end; The suction tube (72) passes through the bottle stopper (6) at one end and is connected to the required evacuation device at the other end.

2. The adjustable sub-vacuum negative pressure generating device according to claim 1, characterized in that: The wheel cover (2) is also equipped with a chassis (202). The bottom of the chassis (202) is connected to the bottom of the inner wall of the wheel cover (2). A rotatable wheel (201) is provided above the chassis (202), and the rotatable wheel (201) is rotatably connected to the chassis (202).

3. The adjustable sub-vacuum negative pressure generating device according to claim 2, characterized in that: The rotatable wheel (201) and the chassis (202) have cylindrical grooves (20) inside, and the flexible hose (21) passes through the grooves.

4. The adjustable subvacuum negative pressure generating device according to claim 3, characterized in that: The bottle stopper (6) can be inserted into the tube (21).

5. The adjustable sub-vacuum negative pressure generating device according to claim 4, characterized in that: The rotatable wheel (201) includes: a bolt (5) slot located on the outer side above the rotatable wheel (201), wherein the bolt (5) passes through the threaded wheel cover (2) and is inserted therein; The sliding groove (23) is an arc-shaped groove, and several are evenly distributed above the rotatable wheel (201); the fixing pin (24) is located inside the sliding groove (23), and its bottom is fixed to the chassis (202), which can limit the maximum movement distance of the sliding groove (23); The connecting rod (25) is rotatably connected at one end to the rotatable wheel (201), and at the other end is rotatably connected to the shrink sheet (27) via a cylindrical pin (26).

6. The adjustable sub-vacuum negative pressure generating device according to claim 5, characterized in that: The rotatable wheel (201) further includes: shrink sheet (27), which are evenly arranged in the groove (28) in several groups; T-slots (29) are evenly arranged in the groove (28), and the shrink sheet (27) is slidably connected in the T-slots (29).

7. The adjustable sub-vacuum negative pressure generating device according to claim 6, characterized in that: The vacuum pump (8) includes: an indicator (9) fixed above the vacuum pump (8); The negative pressure adjustment knob (10) is located on the front of the vacuum pump (8) and can be rotated left and right to adjust the air pressure. The switch (11) is located on one side of the vacuum pump (8).

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