Pressing type air pump

Abstract

The utility model discloses a pressing type air extracting pump which comprises an air cylinder, a silica gel piston assembly is arranged in the air cylinder in a sliding mode, and a one-way silica gel valve and an air channel are arranged at one end in the air cylinder. The handle is arranged at the end, away from the air channel, of the air cylinder, a pressing part is slidably arranged in the handle, and a connecting rod is arranged between the pressing part and the silica gel piston assembly; the one-way silica gel valve comprises a fixed part and a movable part, an arc-shaped air hole is formed between the fixed part and the movable part, a connecting part is arranged at the middle section position of the arc-shaped air hole to divide the arc-shaped air hole into a first air hole and a second air hole, and the two ends of the connecting part are connected with the fixed part and the movable part respectively. The arc-shaped vent holes in the one-way silica gel valve are separated through the connecting part, and the connecting part enables the deformation amplitude to be small when the movable part deforms under the external atmospheric pressure, so that the time required for resetting of the movable part is shorter, air blocking and air exhaust operations can be completed more quickly, and the air exhaust efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air extraction equipment, and discloses a pressing type air extraction pump. BACKGROUND

[0002] In a conventional pressing type air extraction pump, a one-way air blocking silica gel sheet plays a key role. As shown in FIG. 1, the old one-way air blocking silica gel sheet has certain limitations in structural design. The silica gel sheet has a through C-shaped cut in the middle, and the separated part in the middle will deform when the air pressure in the cylinder changes. When the pressure in the cylinder increases, the silica gel sheet should prevent the gas from being discharged from the cylinder through the part; and when the pressure decreases, the gas should be able to smoothly enter the cylinder. However, since the through C-shaped cut has no connecting structure, when the air pressure changes and causes deformation, the deformation amplitude is often too large. This not only affects the elastic recovery performance of the silica gel sheet itself, causing the time required for its next reset deformation to be prolonged, but also has a significant negative impact on the air extraction efficiency of the air extraction pump. In some application scenarios with high requirements for air extraction efficiency, such as vacuum packaging and laboratory gas extraction, such low-efficiency air extraction pumps are difficult to meet the actual needs. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a pressing type air extraction pump, aiming to solve the problem of low air extraction efficiency of the existing air extraction pump.

[0004] The present application provides a pressing type air extraction pump, which comprises: a cylinder, a silica gel piston assembly is slidably arranged in the cylinder, a one-way silica gel valve and an air passage are arranged at one end of the cylinder; a handle is arranged at the end of the cylinder away from the air passage, a pressing part is slidably arranged in the handle, a connecting rod is arranged between the pressing part and the silica gel piston assembly; the one-way silica gel valve comprises a fixed part and a movable part, an arc-shaped air permeable hole is arranged between the fixed part and the movable part, a connecting part is arranged at the middle position of the arc-shaped air permeable hole to separate the arc-shaped air permeable hole into a first air permeable hole and a second air permeable hole, the two ends of the connecting part are connected with the fixed part and the movable part respectively, when the atmospheric pressure in the cylinder is higher than a preset pressure threshold, the movable part abuts against the outlet of the air passage, and the silica gel piston assembly shrinks so that a gap is formed between the silica gel piston assembly and the inner wall of the cylinder, when the atmospheric pressure in the cylinder is lower than the preset pressure threshold, a negative pressure is formed in the cylinder, the movable part is separated from the outlet of the air passage under the external atmospheric pressure, and the silica gel piston assembly abuts against the inner wall of the cylinder.

[0005] As a further improvement of the present application, a gas nozzle is arranged at the inlet of the air passage.

[0006] As a further improvement of the present application, a fixed ring is arranged at one end of the cylinder, the top surface of the fixed part abuts against the inner wall of the cylinder, and the fixed ring abuts against the bottom surface of the fixed part.

[0007] As a further improvement of the present application, the contact surface between the silica gel piston assembly and the inner wall of the cylinder is provided as an inclined surface, so that the end of the silica gel piston assembly close to the air passage is separated from the inner wall of the cylinder.

[0008] As a further improvement of the present application, the connecting rod is sleeved with an elastic member, the end of the handle close to the cylinder is provided with a first limiting portion, and the end of the pressing portion away from the cylinder is provided with a second limiting portion, and the two ends of the elastic member abut against the first limiting portion and the second limiting portion, respectively.

[0009] The beneficial effects achieved by the present application are:

[0010] The present application provides a press-type air pump, by separating the arc-shaped air hole on the one-way silica gel valve through the connecting part, when the external atmospheric pressure of the movable part changes, the deformation amplitude is reduced, so that the time required for the movable part to reset is also less, during the air pumping process, since the one-way silica gel valve can quickly respond to the change of air pressure and accurately seal and intake operation, the time of each air pumping cycle is greatly shortened, under the same air pumping task, the required pressing frequency or working time is reduced, therefore, it not only improves the working efficiency of the air pump, but also reduces the energy consumption. In addition, since the deformation amplitude of the one-way silica gel valve is reduced, its service life is also prolonged, the maintenance cost and replacement frequency are reduced, and the cost performance and market competitiveness of the product are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the existing one-way air blocking silica gel sheet;

[0012] Figure 2 It is a whole structural schematic diagram of one embodiment of the press-type air pump of the present application;

[0013] Figure 3 It is an exploded structural schematic diagram of one embodiment of the press-type air pump of the present application;

[0014] Figure 4 It is a sectional structural schematic diagram of one embodiment of the press-type air pump of the present application;

[0015] Figure 5 It is a structural schematic diagram of the one-way silica gel valve of one embodiment of the press-type air pump of the present application;

[0016] Figure 6 It is a structural schematic diagram of the silica gel piston assembly of one embodiment of the press-type air pump of the present application. DETAILED DESCRIPTION

[0017] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings in the specification and specific embodiments.

[0018] Figure 2 、 Figure 3 and Figure 4 The structure diagram of one embodiment of the push type air pump is shown in the present application. As shown in Figure 2 、 Figure 3 and Figure 4 , the push type air pump comprises a cylinder 1 and a handle 2.

[0019] Wherein, a silica gel piston assembly 11 is slidably arranged in the cylinder 1, the silica gel piston assembly 11 is tightly installed in the cylinder 1 and can reciprocate in the cylinder 1, one end of the cylinder 1 is provided with a one-way silica gel valve 12 and an air passage 13, the one-way silica gel valve 12 allows external gas to enter the cylinder 1 through the air passage 13, while the gas in the cylinder 1 cannot pass through the one-way silica gel valve 12 to enter the air passage 13. The handle 2 is arranged at the end of the cylinder 1 away from the air passage 13, which is convenient for the user to hold. A pressing part 21 is slidably arranged in the handle 2, a connecting rod 22 is arranged between the pressing part 21 and the silica gel piston assembly 11, and the movement of the silica gel piston assembly 11 can be controlled by pressing the pressing part 21.

[0020] Specifically, the silica gel piston assembly 11 comprises a piston base 112 and a silica gel piston 113, the silica gel piston 113 is arranged on the piston base 112, and the piston base 112 is connected with the connecting rod 22. As shown in Figure 5 , the one-way silica gel valve 12 comprises a fixed part 121 and a movable part 122, an arc-shaped air passage 123 is arranged between the fixed part 121 and the movable part 122, a connecting part 124 is arranged at the middle segment of the arc-shaped air passage 123 to divide the arc-shaped air passage 123 into a first air passage 1231 and a second air passage 1232, the two ends of the connecting part 124 are connected with the fixed part 121 and the movable part 122 respectively, when the atmospheric pressure in the cylinder 1 is higher than the preset pressure threshold, the movable part 122 abuts against the outlet of the air passage 13 and the silica gel piston 113 shrinks so that a gap is formed between the silica gel piston 113 and the inner wall of the cylinder 1, when the atmospheric pressure in the cylinder 1 is lower than the preset pressure threshold, a negative pressure is formed in the cylinder 1, the movable part 122 is separated from the outlet of the air passage 13 under the external atmospheric pressure, and the silica gel piston 113 abuts against the inner wall of the cylinder 1.

[0021] Specifically, the arc-shaped air passage 123 is preferably arranged in a "C" shape, the "C" shape structure enables the movable part 122 to better deform under the atmospheric pressure. The connecting part 124 is arranged at the middle segment of the "C" shape to divide the arc-shaped air passage 123 of the "C" shape into the first air passage 1231 and the second air passage 1232, and the connecting part 124 can limit the deformation amplitude of the movable part 122 to prevent the deformation amplitude of the connecting part 124 from being too large.

[0022] The working principle of the pressing type air pump is as follows: in a first air pumping process, when the pressing portion 21 is pushed by an external force, the pressing portion 21 moves towards the handle 2, driving the silica gel piston assembly 11 to move in the air cylinder 1 towards the end of the air cylinder 1, the silica gel piston assembly 11 forms extrusion to the gas in the air cylinder 1, causing the atmospheric pressure in the air cylinder 1 to rise, the gas in the air cylinder 1 starts to extrude the silica gel piston 113, when the atmospheric pressure in the air cylinder 1 is higher than a preset pressure threshold, the silica gel piston 113 shrinks, a gap is generated between the silica gel piston 113 and the air cylinder 1, the gas in the air cylinder 1 is discharged until the atmospheric pressure in the air cylinder 1 is lower than the preset pressure threshold; when the pressing portion 21 is pulled out of the handle 2, the pressing portion 21 drives the silica gel piston assembly 11 to move in the air cylinder 1 away from the air passage 13, the total amount of the gas in the air cylinder 1 does not change but the space increases, causing a negative pressure to be formed in the air cylinder 1, the atmosphere in the air area to be pumped, which is communicated with the air passage 13, forms extrusion to the top surface of the movable portion 122 under the action of the atmospheric pressure, causing the movable portion 122 to deform, a gap is generated between the movable portion 122 and the inlet of the air passage 13, and the gas in the air area to be pumped enters into the air cylinder 1 through the gap. By repeatedly pressing and pulling out the pressing portion 21 until the gas cannot be pumped out, the air pumping operation on the air area to be pumped is completed.

[0023] In the embodiment, the arc-shaped air permeable hole 123 on the one-way silica gel valve 12 is separated by the connecting portion 124, when the external atmospheric pressure causes the movable portion 122 to deform, the deformation amplitude is reduced, so that the time required for the movable portion 122 to return to the original position is also less, and in the air pumping process, the one-way silica gel valve 12 can quickly respond to the change of the air pressure and accurately seal and intake, which greatly shortens the time of each air pumping cycle, reduces the number of pressing or working time required for the same air pumping task, and thus not only improves the working efficiency of the air pump, but also reduces the energy consumption. In addition, since the deformation amplitude of the one-way silica gel valve 12 is reduced, the service life of the one-way silica gel valve 12 is also prolonged, the maintenance cost and replacement frequency are reduced, and the cost performance and market competitiveness of the product are further improved.

[0024] Further, the inlet of the air passage 13 is provided with the air nozzle 14.

[0025] Specifically, by providing the air nozzle 14 at the inlet of the air passage 13, the air nozzle 14 can be used to insert into a vacuum bag or extend into an experimental environment for air pumping operation, so as to be better applicable to various use environments.

[0026] Further, one end of the air cylinder 1 is provided with the fixing ring 15, the top surface of the fixed portion 121 abuts against the inner wall of the air cylinder 1, and the fixing ring 15 abuts against the bottom surface of the fixed portion 121.

[0027] Specifically, by arranging the fixed ring 15 in the cylinder 1, the fixed part 121 is fixed by the fixed ring 15, and a gap is avoided between the fixed part 121 and the cylinder 1, so as to ensure the air tightness of the cylinder 1.

[0028] Further, as shown in the figure, the contact surface between the silica gel piston assembly 11 and the inner wall of the cylinder 1 is arranged as an inclined surface 111, so that the end of the silica gel piston assembly 11 close to the air duct 13 is separated from the inner wall of the cylinder 1. Figure 6

[0029] Specifically, the inclined surface 111 is arranged on the side wall of the silica gel piston 113, and the diameter of the end of the silica gel piston 113 close to the air duct 13 is smaller than the inner diameter of the cylinder 1, so as to provide a contact surface between the gas in the cylinder 1 and the side wall of the silica gel piston 113. When the atmospheric pressure in the cylinder 1 is higher than the preset pressure threshold, the atmospheric pressure in the cylinder 1 is applied to the inclined surface 111, so as to better extrude the silica gel piston 113, so that the silica gel piston 113 shrinks and a gap is generated between the silica gel piston 113 and the inner wall of the cylinder 1. The diameter of the end of the silica gel piston 113 away from the air duct 13 is greater than the inner diameter of the cylinder 1, and when the atmospheric pressure in the cylinder 1 is lower than the preset pressure threshold, the end of the silica gel piston 113 away from the air duct 13 abuts against the inner wall of the cylinder 1, so as to ensure the air tightness of the cylinder 1.

[0030] Further, the elastic component 23 is sleeved on the connecting rod 22, the first limiting part is arranged in the handle 2 close to the cylinder 1, the second limiting part is arranged in the pressing part 21 away from the cylinder 1, and the two ends of the elastic component 23 abut against the first limiting part and the second limiting part, respectively.

[0031] Specifically, the elastic component 23 is preferably a spring. After the pressing part 21 is pressed into the handle 2, when the user releases the pressing part 21, the pressing part 21 is ejected from the handle 2 under the elastic action of the elastic component 23, and drives the silica gel piston assembly 11 to move from the end close to the air duct 13 to the end away from the air duct 13, so as to form a negative pressure in the cylinder 1, and thus the gas is sucked into the cylinder 1 through the inlet of the air duct 13.

[0032] In the embodiment, the elastic component 23 is arranged, and the elastic component 23 is used to reset the silica gel piston assembly 11, so that the silica gel piston assembly 11 does not need to be manually pulled out, the operation steps are more simple, the user uses more labor-saving, and the efficiency is higher.

[0033] ​While the preferred embodiments of the application have been described, additional variations and modifications can be made to these embodiments by those skilled in the art once they have the benefit of the foregoing description without departing from the spirit and scope of the application. Accordingly, many modifications can be made by those skilled in the art without departing from the scope of the application. It is therefore intended that such modifications and variations be included within the scope of the application.

Claims

1. A push-type air suction pump characterized by comprising: It includes: A cylinder, a silica gel piston assembly is slidably arranged in the cylinder, a one-way silica gel valve and an air passage are arranged at one end of the cylinder; A handle is arranged at the end of the cylinder away from the air passage, a pressing part is slidably arranged in the handle, a connecting rod is arranged between the pressing part and the silica gel piston assembly; The one-way silica gel valve includes a fixed part and a movable part, an arc-shaped air hole is arranged between the fixed part and the movable part, a connecting part is arranged at the middle position of the arc-shaped air hole to separate the arc-shaped air hole into a first air hole and a second air hole, the two ends of the connecting part are connected with the fixed part and the movable part respectively, when the atmospheric pressure in the cylinder is higher than the preset pressure threshold, the movable part abuts against the outlet of the air passage and the silica gel piston assembly shrinks to form a gap between the silica gel piston assembly and the inner wall of the cylinder, when the atmospheric pressure in the cylinder is lower than the preset pressure threshold, negative pressure is formed in the cylinder, the movable part is separated from the outlet of the air passage under the external atmospheric pressure, and the silica gel piston assembly abuts against the inner wall of the cylinder.

2. A push-pull gas pump according to claim 1, characterized in that An air nozzle is arranged at the inlet of the air passage.

3. The push-pull gas pump of claim 1, wherein, A fixed ring is arranged at one end of the cylinder, the top surface of the fixed part abuts against the inner wall of the cylinder, and the fixed ring abuts against the bottom surface of the fixed part.

4. The push-pull pump of claim 1, wherein The contact surface between the silica gel piston assembly and the inner wall of the cylinder is arranged as an inclined surface, so that the end of the silica gel piston assembly close to the air passage is separated from the inner wall of the cylinder.

5. The push-pull pump of claim 1, wherein, An elastic member is sleeved on the connecting rod, a first limiting part is arranged at the end of the handle close to the cylinder, a second limiting part is arranged at the end of the pressing part away from the cylinder, and the two ends of the elastic member abut against the first limiting part and the second limiting part respectively.

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