Manual vacuum pump

Abstract

The utility model relates to the technical field of vacuum pumps, and discloses a manual vacuum pump which comprises a shell, an air exhaust nozzle is fixedly connected to the bottom of the shell, an air cylinder is arranged on the inner wall of the air exhaust nozzle in a clamped mode, the shell is arranged on the outer side of the air cylinder in a sleeved mode, and a plurality of vent holes are formed in the bottom of the air exhaust nozzle and the bottom of the air cylinder respectively. A piston is arranged on the inner wall of the air cylinder in a sliding mode, a pressing cylinder is arranged on the upper surface of the piston in a pressing mode, and the pressing cylinder is arranged on the inner wall of the air cylinder in a sliding mode. The piston presses downwards along the inner wall of the inflator, the sealing ring is attached to the gap between the pressing cylinder and the inflator, gas in the inflator can be exhausted through the gap between the piston and the inflator, the end cover is loosened, the spring pushes the piston and the pressing cylinder to move upwards, and the sealing ring is attached to the gap between the piston and the inflator. The piston and the inflator are in a sealed state, gas enters the inflator through the air exhaust nozzle, and air exhaust operation can be completed.

Description

TECHNICAL FIELD

[0001] The utility model relates to vacuum pump technical field especially relates to manual vacuum pump. BACKGROUND

[0002] Manual vacuum pump is a kind of equipment that extracts the gas in container by manual operation, thereby makes the vacuum state in container, it is mainly composed of pump body, piston, handle, air inlet and air outlet etc., user passes through repeatedly operating handle, drives piston movement, realizes the cycle of air suction and exhaust, gradually reduces the air pressure in the container connected.

[0003] In prior art, the traditional manual vacuum pump has the problems of poor air extraction effect, reciprocating action of one suction and one compression needing manual completion, more laborious use, and the slender overall structure is not conducive to stability in the air extraction process, is easy to swing and causes the lower silica gel to air, and the manual vacuum pump has the problem of unquantifiable air extraction amount. UTILITY MODEL CONTENTS

[0004] The utility model discloses a manual vacuum pump, which can solve the problems of poor air extraction effect, reciprocating action of one suction and one compression needing manual completion, more laborious use, and the slender overall structure being not conducive to stability in the air extraction process, being easy to swing and causing the lower silica gel to air, and the manual vacuum pump having the problem of unquantifiable air extraction amount.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] Manual vacuum pump, including the casing, the bottom of casing is fixedly connected with the suction nozzle, the inner wall of suction nozzle is connected with the air cylinder, the casing is sleeved on the outside of air cylinder, the bottom of suction nozzle and air cylinder is respectively provided with a plurality of vent holes, the inner wall of air cylinder is slidably provided with the piston, the upper surface of piston is tightly provided with the compression cylinder, the compression cylinder is slidably arranged on the inner wall of air cylinder, the bottom end inner wall of air cylinder is fixedly connected with the spring, the top end of spring is tightly arranged on the inner wall of piston, the gap between compression cylinder and piston is provided with the sealing ring, the sealing ring is slidably arranged on the inner wall of air cylinder, and the edge of sealing ring is tightly arranged on the inner wall of air cylinder.

[0007] Preferably, the edges of the piston and the compression cylinder are respectively provided with a gap from the inner wall of the air cylinder.

[0008] Preferably, the top end inner wall of the compression cylinder is fixedly connected with a plurality of pressing plates, and the bottoms of the plurality of pressing plates are respectively tightly arranged on the upper surface of the piston.

[0009] Preferably, the top end of the compression cylinder is provided with an end cover, and the bottom of the compression cylinder is outwardly convex and tightly arranged on the top end inner wall of the casing.

[0010] Preferably, a plurality of arc-shaped stops are fixedly connected around the edge of the piston, and the cross section of the arc-shaped stop is set as a trapezoid.

[0011] Preferably, the top end of the compression cylinder is fixedly connected with an elastic clamping plate, and the inner wall of the end cover is provided with a clamping groove, and the elastic clamping plate is clamped and arranged on the inner wall of the clamping groove of the end cover.

[0012] Compared with the prior art, the manual vacuum pump has the following beneficial effects:

[0013] 1. The manual vacuum pump, by the piston along the inner wall of the air cylinder, the sealing ring is arranged at the gap between the compression cylinder and the air cylinder, the gas in the air cylinder is discharged through the gap between the piston and the air cylinder, the end cover is loosened, the spring pushes the piston and the compression cylinder upwards, the sealing ring is arranged at the gap between the piston and the air cylinder, so that the piston and the air cylinder are in a sealed state, and the gas is introduced into the inside of the air cylinder through the air suction nozzle, and the air suction operation can be completed.

[0014] 2. The manual vacuum pump, by controlling the position of the end cover, the air suction amount of the manual vacuum pump can be adjusted, and when the vacuum area reaches a certain vacuum degree, the spring will be constant with the internal negative pressure, at this time, the spring keeps the compression state and cannot push the piston, which represents that the air suction is completed.

[0015] 3. The manual vacuum pump, by the arc-shaped stop, the sealing ring can be stably blocked, the deformation displacement of the sealing ring is prevented, and the sealing effect is affected, and the elastic clamping plate can tightly and stably connect the compression cylinder and the end cover. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model provides a structure perspective drawing of manual vacuum pump;

[0017] Figure 2 The utility model provides a structure sectional view of manual vacuum pump;

[0018] Figure 3 The utility model provides first structure explosion schematic drawing of manual vacuum pump;

[0019] Figure 4 The utility model provides second structure explosion schematic drawing of manual vacuum pump;

[0020] Figure 5 The utility model provides structure bird's eye view schematic drawing of manual vacuum pump air cylinder;

[0021] Figure 6 The utility model provides structure bird's eye view schematic drawing of manual vacuum pump compression cylinder;

[0022] Figure 7The utility model provides a structure bottom view of manual vacuum pump end cover.

[0023] In the figure: 1 shell, 2 suction nozzle, 3 air cylinder, 4 piston, 5 compression cylinder, 6 spring, 7 pressing plate, 8 end cover, 9 sealing ring, 10 arc-shaped stop strip, 11 elastic clamping plate. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0025] Referring to Figures 1-7 , the manual vacuum pump comprises a shell 1, the bottom of the shell 1 is fixedly connected with a suction nozzle 2, the inner wall of the suction nozzle 2 is connected with an air cylinder 3 in a clamping mode, the shell 1 is sleeved on the outer side of the air cylinder 3, the bottom of the suction nozzle 2 and the air cylinder 3 is respectively provided with a plurality of air holes, the inner wall of the air cylinder 3 is slidably provided with a piston 4, the upper surface of the piston 4 is tightly provided with a compression cylinder 5, the compression cylinder 5 is slidably arranged on the inner wall of the air cylinder 3, the bottom end inner wall of the air cylinder 3 is fixedly connected with a spring 6, the top end of the spring 6 is tightly arranged on the inner wall of the piston 4, the gap between the compression cylinder 5 and the piston 4 is provided with a sealing ring 9, the sealing ring 9 is slidably arranged on the inner wall of the air cylinder 3, and the edge of the sealing ring 9 is tightly arranged on the inner wall of the air cylinder 3, the top end of the compression cylinder 5 is provided with an end cover 8, and the bottom of the compression cylinder 5 is outwardly protruding and tightly arranged on the top end inner wall of the shell 1.

[0026] The edges of the piston 4 and the compression cylinder 5 are respectively provided with a gap in the inner wall of the air cylinder 3, a plurality of pressing plates 7 are fixedly connected around the top end inner wall of the compression cylinder 5, and the bottoms of the plurality of pressing plates 7 are tightly arranged on the upper surface of the piston 4.

[0027] In use, the end cover 8 can be pressed to extrude the compression cylinder 5 to press down, the pressing plates 7 in the compression cylinder 5 press the upper surface of the piston 4 to push the piston 4 to move downward along the inner wall of the air cylinder 3, at this time, the sealing ring 9 is tightly arranged in the gap between the compression cylinder 5 and the air cylinder 3, the gas in the air cylinder 3 can be discharged through the gap between the piston 4 and the air cylinder 3, the backflow of the gas through the suction nozzle 2 can be prevented, and the use effect of the vacuum pump can be affected, when the piston 4 moves to a specified position, the end cover 8 is loosened, the spring 6 pushes the piston 4 and the compression cylinder 5 to move upward, at this time, the sealing ring 9 is tightly arranged in the gap between the piston 4 and the air cylinder 3, so that the piston 4 and the air cylinder 3 are in a sealed state, the gas can enter the inside of the air cylinder 3 through the suction nozzle 2, and the air suction operation can be completed.

[0028] By controlling the position of the end cover 8, the air suction amount of the manual vacuum pump can be adjusted, when the area to be vacuumized reaches a certain vacuum degree, the spring 6 keeps constant with the internal negative pressure, at this time, the spring 6 keeps a compressed state and cannot push the piston 4, which represents that the air suction is completed.

[0029] In order to prevent the sealing ring 9 from deforming displacement, affecting the sealing effect, as shown in Figures 1-7 The edge of the piston 4 is fixedly connected with a plurality of arc-shaped blocking strips 10, the cross section of the arc-shaped blocking strip 10 is set as a trapezoidal shape, the top end of the compression cylinder 5 is fixedly connected with a elastic clamping plate 11, the inner wall of the end cover 8 is provided with a clamping groove, and the elastic clamping plate 11 is clamped and arranged on the inner wall of the clamping groove of the end cover 8.

[0030] The arc-shaped blocking strip 10 can stably block the sealing ring 9, prevent the sealing ring 9 from deforming displacement, and affect the sealing effect, and the elastic clamping plate 11 can tightly and stably connect the compression cylinder 5 and the end cover 8.

[0031] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A hand vacuum pump comprising a housing (1), characterized in that: The bottom of the shell (1) is fixedly connected with an air suction nozzle (2), the inner wall of the air suction nozzle (2) is clamped with an air cylinder (3), the shell (1) is sleeved on the outer side of the air cylinder (3), the bottom of the air suction nozzle (2) and the air cylinder (3) is respectively provided with a plurality of air holes, the inner wall of the air cylinder (3) is slidably provided with a piston (4), the upper surface of the piston (4) is tightly provided with a pressing cylinder (5), the pressing cylinder (5) is slidably arranged on the inner wall of the air cylinder (3), the bottom end of the inner wall of the air cylinder (3) is fixedly connected with a spring (6), the top end of the spring (6) is tightly arranged on the inner wall of the piston (4), the gap between the pressing cylinder (5) and the piston (4) is provided with a sealing ring (9), the sealing ring (9) is slidably arranged on the inner wall of the air cylinder (3), and the edge of the sealing ring (9) is tightly arranged on the inner wall of the air cylinder (3).

2. The hand vacuum pump of claim 1, wherein: The edges of the piston (4) and the pressing cylinder (5) are respectively provided with gaps with the inner wall of the air cylinder (3).

3. The hand vacuum pump of claim 1, wherein: The top end of the pressing cylinder (5) is fixedly connected with a plurality of pressing plates (7) around the inner wall, and the bottoms of the plurality of pressing plates (7) are respectively tightly arranged on the upper surface of the piston (4).

4. The hand vacuum pump of claim 1, wherein: The top end of the pressing cylinder (5) is provided with an end cover (8), the bottom of the pressing cylinder (5) is outwardly convex and tightly arranged on the top end of the inner wall of the shell (1).

5. The hand vacuum pump of claim 1, wherein: The edges of the piston (4) are fixedly connected with a plurality of arc-shaped stop strips (10) around the inner wall, and the cross section of the arc-shaped stop strips (10) is provided as a trapezoidal shape.

6. The hand vacuum pump of claim 4, wherein: The top end of the pressing cylinder (5) is fixedly connected with an elastic clamping plate (11), the inner wall of the end cover (8) is provided with a clamping groove, and the elastic clamping plate (11) is tightly arranged on the inner wall of the end cover (8) in the clamping groove.

Images