Vacuum pump capable of continuously pumping air

Abstract

The utility model discloses a vacuum pump capable of pumping air continuously. The vacuum pump comprises a main pump body and a pumping assembly arranged in the main pump body. The suction assembly comprises a shell sleeve arranged at the output end of the main pump body, a cavity arranged in the shell sleeve and a one-way sealing assembly arranged in the cavity, and the one-way sealing assembly is arranged, so that in the first switching state, the first cavity and the suction pipe can be controlled to be communicated with the output end of the main pump body during air suction; in the first switching state, air in a target area is pumped into the cavity at the output end of the main pump body through the suction pipe, in the second switching state, the second cavity and the exhaust pipe can be controlled to communicate with the output end of the main pump body, air in the cavity is exhausted to the outside through the exhaust pipe, and the exchange period can be shortened through control of the one-way sealing assembly; therefore, the influence of the pressure on the air exhaust process is reduced, and the second round of air exhaust can be carried out easily when the target negative pressure is insufficient during the completion of the first round of air exhaust.

Description

Technical Field

[0001] The utility model relates to a vacuum pump, in particular to a vacuum pump capable of continuous air extraction, belonging to the technical field of vacuum pumps. Background Art

[0002] A vacuum pump is a device used to extract gas from the inside of a closed container to achieve a vacuum state. It creates a negative pressure environment to extract the gas inside the container, thereby achieving a vacuum treatment inside the closed container. Vacuum pumps are widely used in various industrial fields, such as vacuum sealers, laboratory equipment, semiconductor manufacturing, etc.

[0003] In the existing vacuum pump used in vacuum sealers, after the first vacuuming operation is completed, the internal vacuuming negative pressure value is not high enough, so a second vacuuming is required. During the second vacuuming, the pump machine is prone to be unable to complete the vacuuming action due to excessive pressure, resulting in shutdown. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a vacuum pump that can continuously evacuate air to solve the problems of the prior art.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A vacuum pump capable of continuous exhaust, comprising:

[0007] A main pump body, and a suction assembly disposed inside the main pump body;

[0008] The suction assembly includes a shell disposed at the output end of the main pump body, a cavity disposed inside the shell, and a one-way sealing assembly disposed inside the cavity, wherein one end of the cavity is connected to the output end of the main pump body;

[0009] The cavity is divided into an independent first cavity and a second cavity by the one-way sealing component, the first cavity is connected to a suction pipe arranged outside the shell, and the second cavity is connected to an exhaust pipe arranged outside the shell;

[0010] When pumping air, the one-way sealing component controls the first cavity, the suction pipe and the output end of the main pump body to be connected, and the second cavity and the output end of the main pump body are switched to a closed state;

[0011] During exhaust, the one-way sealing component controls the second cavity, the exhaust pipe and the main pump output end to be connected, and the first cavity and the main pump output end are switched to a closed state.

[0012] As a further improvement, the shell sleeve includes a first shell sleeve that is sleeved on the output end of the main pump body, and a second shell sleeve that is fixed on one side of the first shell sleeve. The first shell sleeve and the second shell sleeve form a cavity when they are fitted together. The first shell sleeve is provided with a first through hole corresponding to the first cavity, and a second through hole is provided corresponding to the second cavity. The first through hole and the second through hole are connected to the output end of the main pump body.

[0013] As a further improvement, the one-way sealing component includes a sealing sheet for separating the first cavity and the second cavity, a first one-way sealing member is arranged inside the sealing sheet, the first cavity is arranged inside the first cavity, and a second one-way sealing member is arranged inside the second cavity, the first one-way sealing member is used to separate the first cavity and the output end of the main pump body, and the second one-way sealing member is used to separate the second cavity and the output end of the main pump body.

[0014] As a further improvement, the first one-way sealing member includes a first blocking piece adhered to the outer side surface of the first shell and a first locking rod arranged on one side of the first blocking piece, the first locking rod passes through the first shell, and the first blocking piece adheres to and blocks one side of the first through hole, and a clamping portion is provided on one end of the first locking rod away from the first blocking piece.

[0015] As a further improvement, the middle portion of the first blocking piece bulges toward the outer side surface to form an arc-shaped structure.

[0016] As a further improvement, an inner cavity is provided inside the first locking rod.

[0017] As a further improvement, the main pump body includes a reciprocating pumping and pressing mechanism and a motor driving the reciprocating pumping and pressing mechanism, the reciprocating pumping and pressing mechanism includes an eccentric turntable fixedly mounted on the output end of the motor, a shaft rod is inserted on the eccentric turntable, a suction rod rotatably mounted on the shaft rod, a sealing sleeve is mounted on the outer annular surface of the suction rod, the suction rod is movably inserted into a shell sleeve, and the sealing sleeve fits with the inside of the shell sleeve.

[0018] As a further improvement, the second one-way sealing member includes a second sealing sheet integrally provided with the sealing sheet, and the second sealing sheet is fitted to seal one side of the second through hole.

[0019] As a further improvement, the second one-way sealing member includes a second blocking piece adhered to the inner side of the first shell and a second locking rod arranged on one side of the second blocking piece, the second locking rod passes through the first shell, and the second blocking piece adheres to and blocks one side of the second through hole.

[0020] The beneficial effects of the utility model are:

[0021] The utility model is provided with a one-way sealing component, which can, in the first switching state, control the first cavity and the suction pipe to be connected with the output end of the main pump body during air extraction, and draw the air in the target area into the cavity at the output end of the main pump body through the suction pipe; in the second switching state, the second cavity and the exhaust pipe can be controlled to be connected with the output end of the main pump body, and the air in the cavity can be discharged to the outside through the exhaust pipe. Through the control of the one-way sealing component, the exchange cycle can be shortened, thereby reducing the influence of pressure on the air extraction process, and then after completing a round of air extraction time, when the target negative pressure is insufficient, a second round of air extraction can be easily carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 The utility model is a schematic diagram of the explosion structure of a vacuum pump capable of continuously pumping air.

[0024] Figure 2 The utility model is a schematic diagram of the installation state of a vacuum pump capable of continuously exhausting air.

[0025] Figure 3 The utility model is a schematic diagram of the installation completion of a vacuum pump capable of continuously extracting air.

[0026] Figure 4 The utility model is a schematic diagram of the cross-sectional structure of a vacuum pump capable of continuous air extraction.

[0027] Figure 5 The utility model is a schematic structural diagram of a first blocking piece of a vacuum pump capable of continuous air extraction.

[0028] Figure 6 It is a schematic diagram of the matching structure of the second blocking piece of a vacuum pump capable of continuous air extraction according to the utility model.

[0029] 1. Main pump body; 11. Motor; 12. Reciprocating pumping and pressing mechanism; 121. Eccentric turntable; 122. Shaft; 123. Suction rod; 124. Sealing sleeve; 2. Suction assembly; 21. Shell; 22. Cavity; 23. Suction pipe; 24. Exhaust pipe; 25. One-way sealing assembly; 211. First shell; 221. First cavity; 2111. First through hole; 251. Sealing sheet; 212. Second shell; 222. Second cavity; 2112. Second through hole; 252. First one-way closure; 2521. First blocking sheet; 2522. First locking rod; 2523. Inner cavity; 2524. Clamping part; 253. Second one-way closure; 2531. Second blocking sheet; 2532. Second blocking sheet; 2533. Second locking rod. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0031] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the existing vacuum pump used in vacuum sealers, after the vacuum pumping is completed, the negative pressure value of the internal vacuum pumping is not high enough, so a second vacuum pumping is required. During the second vacuum pumping, the pump machine is prone to being unable to complete the vacuuming action due to excessive pressure, resulting in shutdown. In order to solve this problem, a vacuum pump with continuous vacuuming is designed, as follows:

[0033] Example 1

[0034] Reference Figure 1-5 As shown, a vacuum pump capable of continuous exhaust gas extraction comprises:

[0035] A main pump body 1, and a suction assembly 2 arranged inside the main pump body 1;

[0036] The suction assembly 2 includes a shell 21 disposed at the output end of the main pump body 1, a cavity 22 disposed inside the shell 21, and a one-way sealing assembly 25 disposed inside the cavity 22. One end of the cavity 22 is connected to the output end of the main pump body 1.

[0037] The cavity 22 is divided into an independent first cavity 221 and a second cavity 222 by a one-way sealing component 25 . The first cavity 221 is connected to a suction pipe 23 disposed outside the shell 21 , and the second cavity 222 is connected to an exhaust pipe 24 disposed outside the shell 21 .

[0038] When pumping air, the one-way sealing component 25 controls the first cavity 221, the suction pipe 23 and the output end of the main pump body 1 to be connected, and the second cavity 222 and the output end of the main pump body 1 are switched to a closed state;

[0039] During exhaust, the one-way sealing component 25 controls the second cavity 222 and the exhaust pipe 24 to be connected with the output end of the main pump body 1, and the first cavity 221 and the output end of the main pump body 1 are switched to a closed state.

[0040] By setting up the one-way sealing component 25, in the first switching state, the first cavity 221 and the suction pipe 23 can be controlled to be connected with the output end of the main pump body 1 during air extraction, and the air in the target area can be sucked into the cavity at the output end of the main pump body 1 through the suction pipe 23. In the second switching state, the second cavity 222 and the exhaust pipe 24 can be controlled to be connected with the output end of the main pump body 1, and the air in the cavity can be discharged to the outside through the exhaust pipe 24. Through the control of the one-way sealing component 25, the exchange cycle can be shortened, thereby reducing the influence of pressure on its air extraction process. After completing a round of air extraction time, when the target negative pressure is insufficient, a second round of air extraction can be easily carried out.

[0041] The main pump body 1 includes a reciprocating pumping and pressing mechanism 12 and a motor 11 driving the reciprocating pumping and pressing mechanism 12. The reciprocating pumping and pressing mechanism 12 includes an eccentric turntable 121 fixedly mounted on the output end of the motor 11, a shaft 122 is inserted on the eccentric turntable 121, a suction rod 123 rotatably mounted on the shaft 122, a sealing sleeve 124 is sleeved on the outer annular surface of the suction rod 123, the suction rod 123 is movably inserted into the shell sleeve 21, and the sealing sleeve 124 fits with the inside of the shell sleeve 21.

[0042] The sleeve of the movable connection part with the suction rod 123 has a guide channel, and the suction rod 123 reciprocates in the guide channel, and cooperates with the sealing sleeve 124 to suck the first cavity 221 and exhaust the second cavity 222.

[0043] The shell 21 includes a first shell 211 which is sleeved on the output end of the main pump body 1, and a second shell 212 which is fixed on one side of the first shell 211. When the first shell 211 and the second shell 212 are fitted together, a cavity 22 is formed. The first shell 211 is provided with a first through hole 2111 corresponding to the first cavity 221, and a second through hole 2112 is provided corresponding to the second cavity 222. The first through hole 2111 and the second through hole 2112 are connected to the output end of the main pump body 1.

[0044] In the air extraction state, the first through hole 2111 remains in an open state, and the air flows through the first through hole 2111. At this time, the second through hole 2112 remains in a closed state;

[0045] In the exhaust state, the second through hole 2112 remains in an open state, and air flows through the second through hole 2112. At this time, the first through hole 2111 remains in a closed state.

[0046] The one-way sealing component 25 includes a sealing sheet 251 for separating the first cavity 221 and the second cavity 222. The sealing sheet 251 is provided inside the first cavity 221. A first one-way sealing member 252 is provided inside the first cavity 221. A second one-way sealing member 253 is provided inside the second cavity 222. The first one-way sealing member 252 is used to separate the first cavity 221 and the output end of the main pump body 1. The second one-way sealing member 253 is used to separate the second cavity 222 and the output end of the main pump body 1.

[0047] The first one-way sealing member 252 includes a first blocking piece 2521 attached to the outer side of the first shell 211 and a first locking rod 2522 arranged on one side of the first blocking piece 2521. The first locking rod 2522 penetrates the first shell 211, and the first blocking piece 2521 is attached to block one side of the first through hole 2111.

[0048] The first locking rod 2522 penetrates the first shell 211 and is clamped on the inner side of the first shell 211. The first locking rod 2522 is integrated with the first blocking piece 2521. The first blocking piece 2521 and the first locking rod 2522 are made of rubber material and have a certain elasticity. The first locking rod 2522 is provided with a clamping portion 2524 at one end away from the first blocking piece 2521, which is used to constrain the first one-way sealing member 252 to be clamped on the first shell 211.

[0049] The middle portion of the first blocking piece 2521 bulges toward the outer side surface to form an arc-shaped structure.

[0050] The arc-shaped structure can provide a larger contact area, so that the first blocking piece 2521 can better fit on one side of the through hole, thereby enhancing the sealing performance. This raised structure can more effectively fill possible gaps and reduce the possibility of gas leakage. At the same time, on the one hand, this structure weakens the adsorption force of the first through hole 2111 connected to the first cavity 22 on the first blocking piece 2521. On the other hand, its structure with a thick middle and thin sides forms a larger contact area, making it easier for the suction rod 123 to suck it up. When completing one suction, even if there is a certain negative pressure inside the suction target connected to the first cavity 22, the suction rod 123 can complete the second suction action.

[0051] The protruding structure can increase the stability of the first blocking piece 2521, making it less likely to be displaced or deformed by external factors during operation, which helps to ensure that the seal can maintain a stable sealing state under different working conditions.

[0052] In order to further enhance the suction effect of the first blocking piece 2521 of the suction rod 123 , an inner cavity 2523 is provided inside the first locking rod 2522 .

[0053] Improved sealing performance: The first blocking piece 2521 adopts an arc-shaped structure, which has better sealing performance and can more effectively prevent the gas from flowing in the reverse direction from one side of the through hole. This means that during the operation of the pump, even if there is a high pressure difference, the first one-way sealing member 252 can maintain an effective seal to prevent the gas from flowing in the reverse direction into the pump, thereby ensuring the normal pumping operation of the pump.

[0054] Improved structural stability: The first locking rod 2522 is provided with an inner cavity 2523, which enhances the structural stability of the locking rod. This means that even under a high pressure difference, the first locking rod 2522 can maintain a stable shape, while weakening the power of the suction rod 123 to suck up the first blocking piece 2521, so that the suction rod 123 can more easily pull the first blocking piece 2521.

[0055] The second one-way sealing member 253 includes a second sealing sheet 2531 integrally provided with the sealing sheet 251 , and the second sealing sheet 2531 is fitted to seal one side of the second through hole 2112 .

[0056] The sealing sheet 251 and the second sealing sheet 2531 are made of rubber material.

[0057] The integrated arrangement of the sealing sheet 251 and the second sealing sheet 2531 can ensure a tighter connection between the two, reduce possible gaps, and thus improve the overall sealing performance. Such a design can effectively prevent gas or liquid from flowing in the reverse direction from one side of the through hole, ensuring that the pump can maintain a stable suction effect during operation.

[0058] The integrated setting eliminates the extra connection or gap between the two and simplifies the structure of the seal. This not only helps to reduce manufacturing costs, but also reduces the risk of leakage due to failure of the connection and improves the reliability of the overall seal.

[0059] The sealing sheet 251 and the second sealing sheet 2531 made of rubber material have good elasticity and wear resistance, and can adapt to stress and temperature changes under different working conditions. This means that the seal can maintain its sealing performance for a long time without being easily damaged or aged, thereby extending the service life of the pump.

[0060] Due to the integrated design and excellent properties of rubber materials, seals do not require frequent maintenance or replacement, reducing maintenance costs and downtime. This is especially important for equipment that needs to run continuously, ensuring that it can work stably for a long time without being affected by sealing problems.

[0061] The second one-way sealing member 253 includes a second sealing sheet 2531 integrally provided with the sealing sheet 251 , and the second sealing sheet 2531 is fitted to seal one side of the second through hole 2112 .

[0062] Example 2

[0063] Reference Figure 6 As shown, this embodiment is basically the same as embodiment 1, except that the second one-way sealing member 253 includes a second blocking piece 2532 affixed to the inner side of the first shell 211 and a second locking rod 2533 arranged on one side of the second blocking piece 2532, the second locking rod 2533 passes through the first shell 211, and the second blocking piece 2532 affixes to block one side of the second through hole 2112.

[0064] A clamping portion 2524 is disposed at one end of the second locking rod 2533 away from the second blocking piece 2532 , for restricting the second one-way sealing member 253 to be clamped in the first housing 211 .

[0065] The second blocking piece 2532 is fitted to block one side of the second through hole 2112, ensuring that the gas does not flow in the opposite direction from the second through hole 2112 when the pump is running, effectively maintaining the sealing performance of the pump. The setting of the locking rod further strengthens the sealing effect by fixing the second blocking piece 2532, preventing the seal from moving or loosening under high pressure difference.

[0066] It should be noted that the equipment structure and drawings of the utility model mainly describe the principle of the utility model. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above utility model, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field;

[0067] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0068] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A vacuum pump capable of continuous air extraction, characterized in that: include: A main pump body (1), and a suction assembly (2) arranged inside the main pump body (1); The suction assembly (2) comprises a shell (21) arranged at the output end of the main pump body (1), a cavity (22) arranged inside the shell (21), and a one-way sealing assembly (25) arranged inside the cavity (22); one end of the cavity (22) is connected to the output end of the main pump body (1); The cavity (22) is divided into an independent first cavity (221) and a second cavity (222) by the one-way sealing component (25); the first cavity (221) is connected to a suction pipe (23) arranged outside the shell (21); and the second cavity (222) is connected to an exhaust pipe (24) arranged outside the shell (21); When pumping air, the one-way sealing component (25) controls the first cavity (221), the suction pipe (23) and the output end of the main pump body (1) to be connected, and the second cavity (222) and the output end of the main pump body (1) are switched to a closed state; When exhausting, the one-way sealing component (25) controls the second cavity (222), the exhaust pipe (24) and the output end of the main pump body (1) to be connected, and the first cavity (221) and the output end of the main pump body (1) are switched to a closed state.

2. A vacuum pump capable of continuous air extraction according to claim 1, characterized in that: The shell (21) comprises a first shell (211) sleeved on the output end of the main pump body (1), and a second shell (212) fixedly mounted on one side of the first shell (211); the first shell (211) and the second shell (212) form a cavity (22) when they are fitted together; the first shell (211) is provided with a first through hole (2111) corresponding to the first cavity (221); and is provided with a second through hole (2112) corresponding to the second cavity (222); the first through hole (2111) and the second through hole (2112) are connected to the output end of the main pump body (1).

3. A vacuum pump capable of continuous air extraction according to claim 2, characterized in that: The one-way sealing component (25) comprises a sealing sheet (251) for separating the first cavity (221) and the second cavity (222); a first one-way sealing member (252) is arranged inside the sealing sheet (251); a second one-way sealing member (253) is arranged inside the first cavity (221); the first one-way sealing member (252) is used to separate the first cavity (221) and the output end of the main pump body (1); and the second one-way sealing member (253) is used to separate the second cavity (222) and the output end of the main pump body (1).

4. A vacuum pump capable of continuous extraction according to claim 3, characterized in that: The first one-way sealing member (252) includes a first blocking piece (2521) attached to the outer side surface of the first shell (211) and a first locking rod (2522) arranged on one side of the first blocking piece (2521), the first locking rod (2522) passes through the first shell (211), and the first blocking piece (2521) is attached to block one side of the first through hole (2111), and a clamping portion (2524) is provided on one end of the first locking rod (2522) away from the first blocking piece (2521).

5. A vacuum pump capable of continuous air extraction according to claim 4, characterized in that: The middle portion of the first blocking piece (2521) protrudes toward the outer side surface to form an arc-shaped structure.

6. A vacuum pump capable of continuous air extraction according to claim 5, characterized in that: An inner cavity (2523) is provided inside the first locking rod (2522).

7. A vacuum pump capable of continuous extraction according to claim 1, characterized in that: The main pump body (1) comprises a reciprocating pumping and pressing mechanism (12) and a motor (11) driving the reciprocating pumping and pressing mechanism (12); the reciprocating pumping and pressing mechanism (12) comprises an eccentric rotating disk (121) fixedly mounted on the output end of the motor (11); a shaft (122) is inserted on the eccentric rotating disk (121); a pumping rod (123) is rotatably mounted on the shaft (122); a sealing sleeve (124) is sleeved on the outer annular surface of the pumping rod (123); the pumping rod (123) is movably inserted into a shell (21); and the sealing sleeve (124) is fitted with the inside of the shell (21).

8. A vacuum pump capable of continuous air extraction according to claim 4, characterized in that: The second one-way sealing member (253) comprises a second sealing sheet (2531) integrally arranged with the sealing sheet (251), and the second sealing sheet (2531) is fitted to seal one side of the second through hole (2112).

9. A vacuum pump capable of continuous extraction according to claim 4, characterized in that: The second one-way sealing member (253) includes a second blocking piece (2532) attached to the inner side of the first shell (211) and a second locking rod (2533) arranged on one side of the second blocking piece (2532), the second locking rod (2533) passes through the first shell (211), and the second blocking piece (2532) is attached to block one side of the second through hole (2112).

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