Preceding-stage double-vacuum device

Abstract

The utility model discloses a preceding-stage double-vacuum device, which enables the volume of vacuumizing equipment to be reduced, can perform on-site vacuumizing operation, and ensures reliable work of a mass spectrometer in various sites. The preceding-stage main diaphragm pump comprises a first pump body, a first pump body inlet and a first pump body outlet; the front-stage secondary diaphragm pump comprises a second pump body, a second pump body inlet and a second pump body outlet; and a connecting support plate. The upper portion of the preceding-stage main diaphragm pump is covered with the connecting bearing plate, the connecting bearing plate is fixedly arranged on the upper surface of the first pump body, the bottom of the preceding-stage secondary diaphragm pump is supported on the upper surface of the connecting bearing plate, and the bottom of the second pump body is fixedly arranged on the connecting bearing plate. And the outlet of the first pump body is connected with the inlet of the second pump body through a first connecting pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumping, and particularly relates to a pre-stage dual vacuum device. Background Art

[0002] The vacuum system is a crucial component of a mass spectrometer. During the sample analysis process of the mass spectrometer, the sample is first ionized by the ion source, and then mass screening is performed in the mass analyzer. During this process, collisions may occur between ions and between ions and gas molecules in the air, resulting in the loss of sample response. To reduce such collisions, this process needs to be maintained in a highly vacuum environment throughout.

[0003] Conventional bench-top mass spectrometers need to maintain a high vacuum during operation, but the existing large-scale vacuum system equipment is inconvenient to carry, which limits the usage scenarios and cannot be used in scenarios that require on-site detection. Content of the Utility Model

[0004] In view of the above problems, the utility model provides a pre-stage dual vacuum device, which reduces the volume of the vacuum pumping equipment, enables on-site vacuum pumping operations, and ensures the reliable operation of the mass spectrometer in various on-site scenarios.

[0005] A pre-stage dual vacuum device, characterized in that it includes:

[0006] A pre-stage main diaphragm pump, which includes a first pump body, a first pump body inlet, and a first pump body outlet;

[0007] A pre-stage secondary diaphragm pump, which includes a second pump body, a second pump body inlet, and a second pump body outlet;

[0008] And a connecting support plate;

[0009] The upper part of the pre-stage main diaphragm pump is covered with the connecting support plate, the connecting support plate is fixed on the upper surface of the first pump body, the bottom of the pre-stage secondary diaphragm pump is supported on the upper surface of the connecting support plate, the bottom of the second pump body is fixed on the connecting support plate, and the first pump body outlet is connected to the second pump body inlet through a first connecting pipeline.

[0010] It is further characterized in that:

[0011] The second pump body includes two chambers, and the two chambers are connected through a set of connecting pipelines to form an integrated series chamber mechanism;

[0012] It also includes an assembly bracket, which includes a bottom plate, a vertical plate, and two side connecting plates. Lower convex connecting plates are respectively arranged on both sides of the connecting support plate, and corresponding connecting screw holes are arranged on the lower convex connecting plates. A lower convex support angle is arranged at the front end of the first pump body, and a positioning hole is arranged on the lower convex support angle. The pump body formed by the primary main diaphragm pump, the connecting support plate, and the primary secondary diaphragm pump is fixedly arranged on the assembly bracket. The positioning hole of the lower convex support angle is fixedly installed at the corresponding position of the bottom plate through bolts, and the connecting holes on both side connecting plates are respectively fixedly connected with the connecting screw holes through bolts, ensuring the reliable connection between the assembly bracket and the pump body;

[0013] The vertical plate is arranged on the front end face of the pump body, and a fan is fixedly installed on the vertical plate. An avoidance notch is arranged on the vertical plate corresponding to the heat dissipation area of the fan, ensuring the reliable heat dissipation of the fan to the pump body.

[0014] After adopting the above technical solution, through the combination of the primary main diaphragm pump and the primary secondary diaphragm pump, the primary secondary diaphragm pump can be started after a short pre-vacuuming by the primary main diaphragm pump. When the primary main diaphragm pump and the primary secondary diaphragm pump work together, a high vacuum can be maintained, meeting the normal use of the portable mass spectrometer. It makes the volume of the vacuum pumping equipment smaller, and on-site vacuum pumping operations can be carried out, ensuring the reliable operation of the mass spectrometer in various on-site environments; This new type of portable primary double vacuum device has a compact structure, low power consumption, and strong vacuum holding ability, and can work continuously for a long time to ensure the smooth progress of on-site detection. Description of the Drawings

[0015] Figure 1 is a three-dimensional view of the pump body of the present invention Figure 1 ;

[0016] Figure 2 is a three-dimensional view of the pump body of the present invention Figure 2 ;

[0017] Figure 3 is a three-dimensional view of the specific embodiment of the present invention;

[0018] The names corresponding to the serial numbers in the figure are as follows:

[0019] Primary main diaphragm pump 10, first pump body 11, first pump body inlet 12, first pump body outlet 13, lower convex support angle 14, positioning hole 15, primary secondary diaphragm pump 20, second pump body 21, second pump body inlet 22, second pump body outlet 23, positioning connection mechanism 24, connecting support plate 30, lower convex connecting plate 31, connecting screw hole 32, first connecting pipeline 40, connecting pipeline 50, bottom plate 60, vertical plate 70, avoidance notch 71, connecting plate 80, connecting hole 81, fan 90, pump body 100, assembly bracket 200. Detailed Embodiment

[0020] A pre-stage double vacuum device, see Figures 1 - 3 , which includes a pre-stage main diaphragm pump 10, a pre-stage secondary diaphragm pump 20, and a connecting support plate 30;

[0021] The pre-stage main diaphragm pump 10 includes a first pump body 11, a first pump body inlet 12, and a first pump body outlet 13; the pre-stage secondary diaphragm pump 20 includes a second pump body 21, a second pump body inlet 22, and a second pump body outlet 23;

[0022] The upper part of the pre-stage main diaphragm pump 10 is covered with a connecting support plate 30, and the connecting support 30 plate is fixed on the upper surface of the first pump body 11. The bottom of the pre-stage secondary diaphragm pump 20 is supported on the upper surface of the connecting support plate 30. The bottom of the second pump body 21 is fixedly installed at the corresponding connection hole position of the connecting support plate 30 through a positioning connection mechanism 24. The first pump body outlet 13 is connected to the second pump body inlet 22 through a first connecting pipeline 40.

[0023] In specific implementation, the second pump body 20 includes two chambers, and the two chambers are connected through a group of connecting pipelines 50 to form an integrated series chamber mechanism.

[0024] In specific implementation, the first pump body outlet 13 and the second pump body inlet 22 are arranged on the front end face on the same side, so that the first connecting pipeline is not too long.

[0025] In specific implementation, the pre-stage main diaphragm pump 10, the connecting support plate 30, and the pre-stage secondary diaphragm pump 20 are assembled to form a pump main body 100;

[0026] It further includes an assembly bracket 200. The assembly bracket 200 includes a bottom plate 60, a vertical plate 70, and two side connecting plates 80. Lower convex connecting plates 31 are respectively arranged on both sides of the connecting support plate 30, and corresponding connecting screw holes 32 are arranged on the lower convex connecting plates 31. A lower convex support angle 14 is arranged at the front end of the first pump body 11, and a positioning hole 15 is arranged on the lower convex support angle 14. The pump main body 100 is fixed on the assembly bracket 200. The positioning hole of the lower convex support angle is fixedly installed at the corresponding position of the bottom plate 60 through bolts. The connecting holes 81 on the two side connecting plates 80 are respectively fixedly connected to the connecting screw holes 32 through bolts, which ensures the reliable connection between the assembly bracket 200 and the pump main body 100;

[0027] The vertical plate 70 is arranged on the front end face of the pump main body 100. A fan 90 is fixedly installed on the vertical plate 70. An avoidance notch 71 is arranged on the vertical plate 70 corresponding to the heat dissipation area of the fan 90, which ensures the reliable heat dissipation of the fan 90 for the pump main body.

[0028] Its working principle is as follows: Through the combination of the primary main diaphragm pump and the primary secondary diaphragm pump, the primary secondary diaphragm pump can be started after a short pre-vacuum pumping by the primary main diaphragm pump. When the primary main diaphragm pump and the primary secondary diaphragm pump work together, a high vacuum can be maintained to meet the normal use of the portable mass spectrometer. Moreover, the pump body and the fan are reliably connected through the assembly bracket, making it convenient and fast to carry. It reduces the volume of the vacuum pumping equipment, enabling on-site vacuum pumping operations and ensuring the reliable operation of the mass spectrometer in various on-site environments. This new type of portable primary double vacuum device has a compact structure, low power consumption, and strong vacuum holding ability, and can work continuously for a long time to ensure the smooth progress of on-site detection.

[0029] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0030] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A front-stage double vacuum device, characterized in that: It includes: A front-stage main diaphragm pump, comprising a first pump body, a first pump body inlet, and a first pump body outlet; A front-stage secondary diaphragm pump, comprising a second pump body, a second pump body inlet, and a second pump body outlet; and connecting support plates; The upper cover of the front-stage main diaphragm pump is equipped with the connecting support plate, and the connecting support plate is fixedly arranged on the upper surface of the first pump body. The bottom of the front-stage secondary diaphragm pump is supported on the upper surface of the connecting support plate, and the bottom of the second pump body is fixedly installed on the connecting support plate. The first pump body outlet is connected to the second pump body inlet through a first connecting pipeline.

2. A front-stage double vacuum device according to claim 1, characterized in that: The second pump body includes two chambers, which are connected by a set of connecting pipes to form an integrated series chamber mechanism.

3. The front-stage double vacuum device according to claim 1, characterized in that: It also includes an assembly bracket, which includes a bottom plate, a vertical plate, and connecting plates on both sides. Downward convex connecting plates are respectively provided on both sides of the connecting support plate, and corresponding connecting screw holes are provided on the downward convex connecting plates. A downward convex supporting angle is provided at the front end of the first pump body, and a positioning hole is provided on the downward convex supporting angle. The pump body formed by the front-stage main diaphragm pump, the connecting support plate, and the front-stage secondary diaphragm pump is fixedly arranged on the assembly bracket, and the positioning holes of the downward convex supporting angle are fixedly installed on the corresponding positions of the bottom plate by bolts, and the connecting holes on the connecting plates on both sides are respectively fixedly connected with connecting screw holes by bolts.

4. A front-stage double vacuum device according to claim 3, characterized in that: The vertical plate is arranged on the front end surface of the pump body, a fan is fixedly mounted on the vertical plate, and an avoidance notch is arranged on the vertical plate corresponding to the heat dissipation area of ​​the fan.

Images