Air inlet housing of miniature vacuum pump

Abstract

The utility model relates to the technical field of miniature vacuum pumps, and discloses an air inlet cover shell of a miniature vacuum pump, which comprises a miniature vacuum pump body, an air inlet pipe is fixedly connected to the outer wall of the miniature vacuum pump body, an air inlet cover shell body is fixedly connected to the outer wall of the air inlet pipe, and a round sleeve is arranged on one side of the air inlet cover shell body. A butt joint sleeve is fixedly connected to the outer wall of the round sleeve, a sealing sleeve is fixedly connected to the side outer wall of the air inlet cover shell, a sealing ring is installed on the outer wall of the sealing sleeve, a butt joint groove matched with the sealing sleeve is formed in the outer wall of the round sleeve, and a sealing groove is formed in the outer wall, located on one side of the sealing sleeve, of the air inlet cover shell. According to the utility model, a double-sealing structure can be formed, gas leakage can be effectively prevented, stable vacuum degree can be maintained in a vacuum environment, the sealing reliability can be improved, and the round sleeve can be quickly disassembled to replace flange plates of different models; and the gas inlet housing is quickly connected with gas external equipment with different specifications.

Description

TECHNICAL FIELD

[0001] The utility model application relates to the technical field of micro vacuum pump, especially to an air inlet cover shell of micro vacuum pump. BACKGROUND

[0002] In modern industry, scientific research and civilian fields, micro vacuum pumps are widely used in medical devices (such as negative pressure aspirators), laboratory gas sampling, industrial automation vacuum adsorption, household cleaning equipment and other scenes due to their small size, low energy consumption and easy integration. As a key component for connecting external air inlet systems, the performance of the air inlet cover shell directly affects the working efficiency and stability of the pump body, and it is a core component for ensuring gas transmission quality and maintaining vacuum degree

[0003] For the above related technology, the inventor believes that the air inlet cover shell is mostly dependent on a single sealing ring or a simple threaded connection method in terms of sealing structure. This single sealing form is difficult to form a reliable sealing barrier when facing high-precision vacuum environments or complex working conditions, and is prone to gas leakage, resulting in a decrease in pump body vacuum degree and a decrease in pumping efficiency. Therefore, an air inlet cover shell of a micro vacuum pump is proposed to solve the above problems.

[0004] The above information disclosed in the background is only used to increase the understanding of the background of the present application, and therefore, it can include prior art known to those skilled in the art. INVENTION CONTENTS

[0005] To solve the above problems, the present application provides an air inlet cover shell of a micro vacuum pump.

[0006] The air inlet cover shell of a micro vacuum pump provided by the present application adopts the following technical solution:

[0007] An air inlet cover shell of a micro vacuum pump, comprising a micro vacuum pump body, an air inlet pipe fixedly connected to the outer wall of the micro vacuum pump body, and an air inlet cover shell body fixedly connected to the outer wall of the air inlet pipe, wherein one side of the air inlet cover shell body is provided with a round sleeve, the outer wall of the round sleeve is fixedly connected with a butt joint sleeve, the outer wall of the air inlet cover shell body is fixedly connected with a sealing sleeve, the outer wall of the sealing sleeve is provided with a sealing ring, the outer wall of the round sleeve is provided with a butt joint groove matched with the sealing sleeve, the outer wall of the sealing groove on one side of the air inlet cover shell body is provided with a sealing groove, and the outer wall of the sealing groove is movably installed with an annular sealing air bag, and the round sleeve and the air inlet cover shell body are provided with a quick release assembly.

[0008] Preferably, the quick release assembly comprises a plurality of circular grooves, the plurality of circular grooves are arranged in a circumferential array on the outer wall of the air inlet cover shell body, the outer wall of the circular groove is movably installed with a fixed ball, and the outer wall of the butt joint sleeve is provided with a trapezoidal groove matched with the plurality of fixed balls.

[0009] Preferably, the outer wall of the air inlet cover housing is provided with external threads, and the air inlet cover housing is threadedly connected with a rotating sleeve through the external threads.

[0010] Preferably, the outer wall of the circular sleeve is fixedly connected with a flange.

[0011] Preferably, the plurality of circular grooves are designed in a tapered shape.

[0012] In summary, the present application has the following beneficial technical effects:

[0013] The circular sleeve and the air inlet cover housing are abutted and installed, the sealing sleeve is abutted with the abutment groove, the sealing ring in the abutment groove is tightly fitted to form an initial seal, and the gap between the circular sleeve and the air inlet cover housing is further filled after the annular sealing air bag in the sealing groove is inflated, thereby further forming a sealing barrier and a double sealing structure, which can effectively prevent gas leakage and ensure stable vacuum degree in a high-precision vacuum environment, thereby improving the sealing reliability. The tapered circular groove, the fixed ball and the trapezoidal groove are cooperated to realize quick locking and separation of the circular sleeve and the air inlet cover housing. When the circular sleeve is inserted, the fixed ball is automatically moved upward along the tapered surface and clamped into the trapezoidal groove. By rotating the rotating sleeve, the rotating sleeve extrudes and fixes the fixed ball, and the connection can be completed without tools. When disassembling, the constraint is released by reversing the rotating sleeve, and the components can be easily separated. The whole disassembly process is simple in operation and short in time, and the user can realize quick disassembly of the circular sleeve to replace different types of flanges, thereby realizing quick connection of the air inlet cover housing with different specifications of gas conveying pipelines, filtering devices and other external equipment. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a whole schematic view of the application embodiment;

[0015] Figure 2 is a structure schematic view of the air inlet cover housing of the application embodiment;

[0016] Figure 3 is a structure sectional view of the air inlet cover housing of the application embodiment;

[0017] Figure 4 is a structure schematic view of the circular sleeve of the application embodiment;

[0018] BRIEF DESCRIPTION OF DRAWINGS 1, micro vacuum pump body; 2, rotating sleeve; 3, flange; 4, air inlet pipe; 5, circular sleeve; 6, external thread; 8, fixed ball; 9, circular groove; 10, annular sealing air bag; 11, sealing groove; 12, sealing ring; 13, abutment groove; 14, trapezoidal groove; 15, sealing sleeve; 16, abutment sleeve; 17, air inlet cover housing. DETAILED DESCRIPTION

[0019] The application is further described below in conjunction with the accompanying drawings. Figure 1 Figure 4 The application is further described below in conjunction with the accompanying drawings.

[0020] The air inlet cover of a miniature vacuum pump includes a miniature vacuum pump body 1, the outer wall of the miniature vacuum pump body 1 is fixedly connected with an air inlet pipe 4, the air inlet pipe 4 serves as a channel for gas to enter the pump body, and the outer wall of the air inlet pipe 4 is fixedly connected with an air inlet cover body 17, one side of the air inlet cover body 17 is provided with a round sleeve 5, the round sleeve 5 can be in abutment with the air inlet cover body 17, the outer wall of the round sleeve 5 is fixedly connected with an abutment sleeve 16, and the side outer wall of the air inlet cover body 17 is fixedly connected with a sealing sleeve 15, the outer wall of the sealing sleeve 15 is provided with a sealing ring 12, the outer wall of the round sleeve 5 is provided with an abutment groove 13 matched with the sealing sleeve 15, when the abutment sleeve 16 on the round sleeve 5 is sleeved with the air inlet pipe 4, the sealing sleeve 15 is in abutment with the abutment groove 13 at this time, the sealing ring 12 is tightly attached to the inner wall of the abutment groove 13, the outer wall of the air inlet cover body 17 located at one side of the sealing sleeve 15 is provided with a sealing groove 11, forming an initial sealing barrier, effectively preventing gas from leaking from the connection, providing a basic sealing guarantee for the air inlet system, and the outer wall of the sealing groove 11 is movably provided with an annular sealing air bag 10, when the round sleeve 5 is in abutment with the air inlet cover body 17, the annular sealing air bag 10 is inflated through the inflation pipe at this time, so that the annular sealing air bag 10 maintains a stable inflation state, further filling the tiny gap between the two, forming a second sealing line, providing more reliable sealing effect, effectively preventing tiny leakage, further improving the sealing performance and working stability of the air inlet system of the miniature vacuum pump, and the round sleeve 5 and the air inlet cover body 17 are provided with a quick release assembly, which not only ensures the stable connection between the air inlet cover, the round sleeve 5 and the air inlet cover body 17, but also realizes quick disassembly, greatly improving the convenience of equipment maintenance.

[0021] The quick release assembly includes a plurality of circular grooves 9, the plurality of circular grooves 9 are arranged in a circumferential array on the outer wall of the air inlet cover body 17, the outer wall of the circular groove 9 is movably provided with a fixed ball 8, the outer wall of the abutment sleeve 16 is provided with a trapezoidal groove 14 matched with the plurality of fixed balls 8, by making the abutment sleeve 16 on the round sleeve 5 in abutment with the air inlet cover body 17, and the round sleeve 5 is sleeved on the air inlet pipe 4, in the process of inserting the round sleeve 5, the fixed ball 8 is moved upwardly under the extrusion of the inner wall of the abutment sleeve 16, when the round sleeve 5 is in place, the fixed ball 8 is clamped into the trapezoidal groove 14 under the action of gravity and friction, by fixing the fixed ball 8, the locking connection between the round sleeve 5 and the air inlet cover body 17 is completed.

[0022] ​The outer wall of the air inlet cover housing 17 is provided with external threads 6, and the air inlet cover housing 17 is threadedly connected with a rotating sleeve 2 through the external threads 6. When the fixing ball 8 is clamped into the trapezoidal groove 14, the rotating sleeve 2 is rotated to exert a force on the fixing ball 8, so that the fixing ball 8 is stably clamped into the trapezoidal groove 14, the connection reliability is enhanced, and the continuity of the sealing performance is ensured.

[0023] The outer wall of the circular sleeve 5 is fixedly connected with a flange plate 3. The flange plate 3 provides a standardized external connection interface for the air inlet cover housing. The user can quickly and stably install the air inlet cover housing on the device through bolts and other connecting members. The circular sleeve 5 can be quickly disassembled to replace the flange plate 3 of different models, so that the flange plate 3 is connected with different devices, and the applicability of the micro vacuum pump body 1 is improved.

[0024] The plurality of circular grooves 9 are designed in a guide cone shape, and the diameter of the opening end is larger than that of the bottom, forming a structure with a wide top and a narrow bottom. In the process of inserting the circular sleeve 5, the fixing ball 8 is extruded along the guide cone surface by the inner wall of the butt joint sleeve 16 and moves upward. When the circular sleeve 5 is in place, the fixing ball 8 falls into the trapezoidal groove 14 to realize locking. The guide cone structure makes the fixing ball 8 in the circular groove 9 subject to a lateral restraining force of the groove wall. The force and the gravity and friction force jointly act to form a stable limiting effect. Even when the device is subjected to external force interference such as vibration and bumping, the fixing ball 8 is difficult to come out of the circular groove 9, so as to effectively avoid falling and ensure the reliability of the quick-release assembly connection.

[0025] The utility model discloses a kind of implementation principles of the air inlet cover shell of micro vacuum pump application embodiment: first, according to the flange interface of different specifications equipment, select appropriate flange plate 3, by the butt joint sleeve 16 on round sleeve 5 is aligned air inlet cover shell 17 insertion, sealing sleeve 15 is embedded butt joint groove 13 of round sleeve 5 at this time. Since the sealing ring 12 of sealing sleeve 15 outer wall and butt joint groove 13 inner wall closely adhere to, form initial sealing barrier, effectively prevent gas from air inlet cover shell 17 and round sleeve 5 connection place leakage, provide basic sealing guarantee for air intake system, avoid external air to influence the vacuum degree of vacuum pump, when round sleeve 5 and air inlet cover shell 17 butt joint in place, annular sealing air bag 10 in air inlet cover shell 17 sealing groove 11 is in pre-compression state. By gas charging pipeline to annular sealing air bag 10 inflation, make it maintain stable inflation state, further fill the tiny gap between air inlet cover shell 17 and round sleeve 5, form second sealing defense line. Double sealing structure cooperates with each other, significantly improve sealing performance, even in the working condition that sealing property requirement is extremely high, also can effectively prevent tiny leakage, ensure that micro vacuum pump air intake system stable operation, maintain the vacuum degree and working efficiency of equipment, and when the butt joint sleeve 16 of round sleeve 5 is inserted into air inlet cover shell 17, butt joint sleeve 16 inner wall extrusion fixed ball 8, make it move upwards along the guide conical circular groove 9 of air inlet cover shell 17. When round sleeve 5 is inserted in place, fixed ball 8 is aligned with trapezoidal groove 14 of butt joint sleeve 16, under the action of gravity and friction, fixed ball 8 falls into trapezoidal groove 14, complete the quick locking of round sleeve 5 and air inlet cover shell 17, guide conical circular groove 9 design makes fixed ball 8 be constrained by groove wall lateral force during movement, under the action of gravity and friction, ensure that fixed ball 8 is stably inserted into trapezoidal groove 14, even if equipment vibration is not easy to come out, guarantee connection reliability, so that rotary rotating sleeve 2, utilize the thread connection of its and air inlet cover shell 17 outer thread 6, further stabilize the position of fixed ball 8 in trapezoidal groove 14, enhance the reliability of round sleeve 5 and air inlet cover shell 17 connection, guarantee that sealing structure is continuously effective during equipment operation, prevent sealing failure due to connection loosening, then complete the sealing between round sleeve 5 and air inlet pipe 4, air inlet pipe 4 can also be connected with different specifications equipment simultaneously, significantly improve the applicability of micro vacuum pump body 1, satisfy the diversified use demand.

Claims

1. An air inlet casing for a miniature vacuum pump, comprising a miniature vacuum pump body (1), characterized in that: The outer wall of the micro vacuum pump body (1) is fixedly connected to an air inlet pipe (4), and the outer wall of the air inlet pipe (4) is fixedly connected to an air inlet cover housing (17). A round sleeve (5) is provided on one side of the air inlet cover housing (17). A mating sleeve (16) is fixedly connected to the outer wall of the round sleeve (5), and a sealing sleeve (15) is fixedly connected to the outer side wall of the air inlet cover housing (17). A sealing ring (12) is installed on the outer wall of the sealing sleeve (15). A mating groove (13) that matches the sealing sleeve (15) is opened on the outer wall of the round sleeve (5). A sealing groove (11) is opened on the outer wall of the air inlet cover housing (17) located on the side of the sealing sleeve (15), and an annular sealing airbag (10) is movably installed on the outer wall of the sealing groove (11). A quick-release assembly is provided between the round sleeve (5) and the air inlet cover housing (17).

2. The air inlet housing of a miniature vacuum pump according to claim 1, characterized in that: The quick-release assembly includes multiple circular grooves (9), which are arranged in a circumferential array on the outer wall of the air intake housing (17). A fixed ball (8) is movably installed on the outer wall of the circular groove (9), and a trapezoidal groove (14) adapted to the multiple fixed balls (8) is provided on the outer wall of the docking sleeve (16).

3. The air inlet housing of a miniature vacuum pump according to claim 1, characterized in that: The outer wall of the air intake hood housing (17) is provided with an external thread (6), and the air intake hood housing (17) is threadedly connected to a rotating sleeve (2) through the external thread (6).

4. The air inlet housing of a miniature vacuum pump according to claim 1, characterized in that: A flange (3) is fixedly connected to the outer wall of the sleeve (5).

5. The air inlet housing of a miniature vacuum pump according to claim 2, characterized in that: The multiple circular grooves (9) are designed in a guide cone shape.

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