A calibration structure for a vacuum gauge

Abstract

This utility model relates to the field of vacuum gauge calibration technology and discloses a vacuum gauge calibration structure, including a bracket. A vacuum pump is installed inside the bracket, and a claw-shaped tube is connected to one side of the vacuum pump. A bent tube is connected to the rear side of the claw-shaped tube. This novel solution utilizes a sliding mechanism that engages with a sliding groove, combined with a magnetic fixing structure formed by magnetic strips. This allows the protective mechanism to slide flexibly along the groove while simultaneously fixing the sliding position quickly through magnetic force, preventing displacement during use and ensuring the stability of the protection. The protective plate, through precise engagement with the groove frame via guide rods and an elastic structure formed by adjusting springs, facilitates height adjustment to accommodate interfaces of different specifications. The evenly distributed groove frame and guide rods provide a stable support base for the protective plate, ensuring flatness and sealing of the protective plate coverage. When the protective plate is in contact with the joint, it effectively prevents dust, debris, and other external contaminants from entering the joint.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum gauge calibration technology, specifically a calibration structure for a vacuum gauge. Background Technology

[0002] A vacuum gauge, also known as a vacuum meter, is an instrument used to measure vacuum levels or air pressure. It typically measures air pressure by utilizing changes in a certain physical effect of gas under different pressures and is widely used in scientific research and industrial production. During the manufacturing process of vacuum gauges, calibration and standardization by specialized institutions are often required.

[0003] Patent CN220304735U discloses a vacuum gauge calibration device, belonging to the field of vacuum gauge calibration technology. It includes a base plate with four support rods fixedly mounted on it. A top plate is fixedly mounted on the other end of each support rod. A first pipe is fixedly mounted on the output end of a vacuum pump on the base plate, and a first air valve is fixedly mounted on the base plate. The first pipe passes through the first air valve, and a second pipe is fixedly mounted at the end of the first pipe. The second pipe is fixedly connected to the top plate and limited and fixed by a limiting post. The vacuum gauge to be tested is then connected to each interface. The vacuum pump is started, and the first and second valves are opened. The meter readings of a standard vacuum gauge and other vacuum gauges to be tested are recorded for inspection. When the device is not in use, the operator moves the squeezing post and rotates the interface to store it in a storage box to prevent dust from falling on the interface.

[0004] However, the aforementioned vacuum gauge calibration device still has the following shortcomings: The above-mentioned device requires the operation of several extrusion columns related to each interface to protect several interfaces. The whole process is cumbersome, time-consuming and labor-intensive. Therefore, we propose a calibration structure for a vacuum gauge. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides a calibration structure for a vacuum gauge, which effectively solves the problem that the existing device requires the operation of several extrusion columns related to each interface to protect several interfaces, which is a cumbersome, time-consuming and labor-intensive process.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a calibration structure for a vacuum gauge, comprising a bracket, a vacuum pump housed inside the bracket, a claw-shaped tube connected to one side of the vacuum pump, a bent tube connected to the rear side of the claw-shaped tube, valves connected to the top of the claw-shaped tube and the bent tube, a transmission tube connected to the top of each valve, a hollow frame provided at the end of each transmission tube away from the valve, a limiting mechanism provided at the front of each transmission tube, a vacuum gauge to be tested screwed to the top of multiple limiting mechanisms connected to the claw-shaped tube, a standard vacuum gauge screwed to the top of the limiting mechanism connected to the bent tube, and a sliding groove provided on the top surface of the bracket, with a protective mechanism engaged inside the sliding groove.

[0007] Preferably, the limiting mechanism includes a limiting frame, which is fixed to the top surface of the hollow frame. A connector is engaged inside the limiting frame. A set of cylindrical frames are symmetrically fixed on both sides of the limiting frame. A set of T-shaped limiting rods are symmetrically passed through the inside of the set of cylindrical frames. A handle is fixed to the outer end of the T-shaped limiting rod. A limiting ring plate is fixedly sleeved on the surface of the T-shaped limiting rod. A limiting spring is provided on one side of the limiting ring plate.

[0008] Preferably, the surface of the connector is provided with a limiting groove that matches the inner end of the T-shaped limiting rod.

[0009] Preferably, the vacuum gauge to be tested and the standard vacuum gauge are respectively threadedly connected to their corresponding connectors, and each connector is connected to the transmission tube through the limiting frame and the hollow frame.

[0010] Preferably, the T-shaped limiting rod forms an elastic structure with the cylindrical frame through the limiting ring plate and the limiting spring, and the outer wall of the limiting ring plate is in contact with the inner wall of the cylindrical frame.

[0011] Preferably, the protective mechanism includes a slide, which is movably engaged inside a slide groove. A set of magnetic strips are symmetrically fitted on the front and rear surfaces of the slide. Several slot frames are uniformly fixed on the top of the slide. A protective plate is attached to the top of the slot frame. A handle is fixed to the middle of the top of the protective plate. A guide rod is matched and engaged inside the upper part of the slot frame. An adjusting spring is connected to the bottom of the guide rod.

[0012] Preferably, the carriage forms a magnetic attraction structure with the slide groove via the magnetic strip.

[0013] Preferably, the protective plate is formed into a locking elastic structure by a guide rod, an adjusting spring, and a groove frame, and the guide rod and the protective plate are fixedly connected.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. Through the movable locking mechanism of the carriage and the slide groove, combined with the magnetic fixing structure formed by the magnetic strip, the protective mechanism can slide flexibly along the slide groove, and the position of the carriage can be quickly fixed by the magnetic force to prevent displacement during use and ensure the stability of the protection. The protective plate is precisely locked with the guide rod and the groove frame, combined with the elastic structure formed by the adjusting spring, so as to easily adjust the height of the protective plate to fit the interface of different specifications of joints. The evenly distributed groove frame and guide rod provide a stable support base for the protective plate, ensuring the flatness and sealing of the protective plate coverage. When the protective plate is attached to the joint, it effectively prevents dust, debris and other external pollutants from entering the interior of the joint.

[0015] 2. By integrating core components such as vacuum pumps, claw-shaped tubes, and bent tubes through a bracket, along with valves and transmission pipes, it can simultaneously connect several vacuum gauges to be tested and standard vacuum gauges, enabling synchronous access and comparative calibration of both, significantly improving the efficiency of calibration operations. The limiting mechanism adopts a locking fit between the limiting frame and the connector, combined with an elastic limiting structure consisting of a T-shaped limiting rod and a limiting spring. This achieves rapid positioning of the connector through the precise fit between the limiting groove and the T-shaped limiting rod, while the elastic force of the limiting spring ensures the sealing and stability of the connector after connection with the vacuum gauge to be tested and the standard vacuum gauge, effectively avoiding measurement errors caused by loose connections during calibration. The limiting of the connector can be released by pulling the external handle, facilitating the disassembly and replacement of the connector. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective; Figure 3 This is a schematic diagram of the protective structure of the connector of this utility model; Figure 4 This is a partial cross-sectional structural diagram of the limiting mechanism of this utility model; Figure 5 This is a three-dimensional structural diagram of the protective mechanism of this utility model; Figure 6 This is a partial cross-sectional structural diagram of the protective mechanism of this utility model.

[0018] In the diagram: 1. Support; 2. Vacuum pump; 3. Claw-shaped tube; 4. Bending tube; 5. Valve; 6. Transmission tube; 7. Hollow frame; 8. Limiting mechanism; 801. Limiting frame; 802. Connector; 803. Cylindrical frame; 804. T-shaped limiting rod; 805. Handle; 806. Limiting ring plate; 807. Limiting spring; 9. Vacuum gauge to be tested; 10. Standard vacuum gauge; 11. Slide groove; 12. Protective mechanism; 1201. Slide carriage; 1202. Magnetic strip; 1203. Slot frame; 1204. Protective plate; 1205. Handle; 1206. Guide rod; 1207. Adjusting spring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-6A calibration structure for a vacuum gauge includes a support 1. A vacuum pump 2 is housed inside the support 1. A claw-shaped tube 3 is connected to one side of the vacuum pump 2, and a bent tube 4 is connected to the rear side of the claw-shaped tube 3. Valves 5 are connected to the top ends of both the claw-shaped tube 3 and the bent tube 4. A transmission tube 6 is connected to the top of each valve 5. A hollow frame 7 is provided at the end of each transmission tube 6 away from the valve 5, and a limiting mechanism 8 is provided at the front of each transmission tube 6. Multiple limiting mechanisms 8 connected to the claw-shaped tube 3 are each screwed to the top of a vacuum gauge 9 to be tested. A standard vacuum gauge 10 is screwed to the top of a limiting mechanism 8 connected to the bent tube 4. A groove 11 is formed on the top surface of the support 1, and a protective mechanism 12 is engaged inside the groove 11. The limiting mechanism 8 includes a limiting frame 801. A limiting frame 801 is fixed to the top surface of the hollow frame 7. A connector 802 is engaged inside the limiting frame 801. A set of cylindrical frames 803 are symmetrically fixed on both sides of the limiting frame 801, and a set of T-shaped limiting rods 804 symmetrically pass through the interior of each cylindrical frame 803. The connector 802 has a limiting groove on its surface that matches the inner end of the T-shaped limiting rod 804. The vacuum gauge 9 to be tested and the standard vacuum gauge 10 are threadedly connected to their corresponding connectors 802. Each connector 802 is connected to the transmission pipe 6 via the limiting frame 801 and the hollow frame 7. The limiting mechanism 8 uses a spring-driven T-shaped limiting rod 804 that engages with the limiting groove of the connector 802. When connecting the vacuum gauge 10, the spring force automatically locks and positions the connector 802, ensuring the stability and sealing of the connection between the vacuum gauge 10 and the connector 802. This effectively prevents leaks during calibration due to loose connections, thus ensuring the accuracy of the measurement data. A handle 805 is fixedly connected to the outer end of the T-shaped limiting rod 804, and a limiting ring plate 806 is fixedly sleeved on the surface of the T-shaped limiting rod 804. A limiting spring 807 is provided on one side of the limiting ring plate 806. Furthermore, the T-shaped limiting rod 804, through the limiting ring plate 806, the limiting spring 807, and the cylinder frame 803, forms an elastic structure. The outer wall of the limiting ring plate 806 is in contact with the inner wall of the cylinder frame 803. By integrating core components such as the vacuum pump 2, claw tube 3, and bent tube 4 through the bracket 1, and in conjunction with the valve 5 and the transmission pipe 6, several vacuum gauges 9 to be tested and standard vacuum gauges 10 can be connected simultaneously, realizing synchronous access and comparative calibration of the two, which greatly improves the efficiency of the calibration operation.

[0021] The limiting mechanism 8 uses the locking engagement of the limiting frame 801 and the connector 802, combined with the elastic limiting structure formed by the T-shaped limiting rod 804 and the limiting spring 807. It achieves rapid positioning of the connector 802 through the precise fit between the limiting groove and the T-shaped limiting rod 804, and ensures the sealing and stability of the connector 802 after it is connected to the vacuum gauge 9 under test and the standard vacuum gauge 10 by the elastic force of the limiting spring 807. This effectively avoids measurement errors caused by loose connections during calibration. The limiting of the connector 802 can be released by pulling the external handle 805, which facilitates the disassembly and replacement of the connector 802.

[0022] The protective mechanism 12 includes a slide 1201, which is movably engaged inside a slide groove 11. A set of magnetic strips 1202 are symmetrically fitted onto the front and rear surfaces of the slide 1201. The slide 1201 and the slide groove 11 form a magnetic attraction structure through the magnetic strips 1202. Several slots 1203 are evenly fixed to the top of the slide 1201, and a protective plate 1204 is attached to the top of each slot 1203. A handle 1205 is fixed to the middle of the top of the protective plate 1204. A guide rod 1206 is fitted inside the upper part of each slot 1203, and an adjusting spring 1207 is connected to the bottom of the guide rod 1206. Furthermore, the protective plate 1204, through the guide rod 1206, the adjusting spring 1207, and the slot 1203, form a locking elastic structure. With the protective mechanism 12 in place, the operator only needs to lift the entire protective plate 1204 by the handle 1205 or press it down to cover or expose all the interfaces of the connectors 802 at once through the snap-fit ​​elastic structure.

[0023] The guide rod 1206 and the protective plate 1204 are fixedly connected. Through the movable engagement of the slide 1201 and the slide groove 11, combined with the magnetic attraction structure formed by the magnetic strip 1202, the protective mechanism 12 can slide flexibly along the slide groove 11, allowing the entire protective cover to easily slide between the "protection position" and the "calibration position." Simultaneously, the magnetic attraction force quickly fixes the position of the slide 1201, preventing displacement during use and ensuring stable positioning for protection stability. This design avoids the cumbersome process of operating each interface individually, as required by traditional solutions, achieving one-click, batch interface protection, greatly saving operation time and manpower, and effectively preventing interface contamination due to negligence. Meanwhile, the protective plate 1204, through the precise engagement of the guide rod 1206 and the slot frame 1203, combined with the elastic structure formed by the adjusting spring 1207, facilitates height adjustment of the protective plate 1204, thus adapting to interfaces of different connector specifications 802. The evenly distributed slot frame 1203 and guide rod 1206 provide a stable support base for the protective plate 1204, ensuring the flatness and sealing of the protective plate 1204. When the protective plate 1204 is attached to the joint 802, it effectively prevents external pollutants such as dust and debris from entering the interior of the joint 802.

Claims

1. A calibration structure for a vacuum gauge, characterized by: The device includes a support (1), inside which is a vacuum pump (2). A claw-shaped tube (3) is connected to one side of the vacuum pump (2), and a bent tube (4) is connected to the rear side of the claw-shaped tube (3). A valve (5) is connected to the top of the claw-shaped tube (3) and the bent tube (4). A transmission tube (6) is connected to the top of each valve (5). A hollow frame (7) is provided at the end of each transmission tube (6) away from the valve (5). A limiting mechanism (8) is provided on the front side of each transmission tube (6). A vacuum gauge (9) to be tested is screwed to the top of the multiple limiting mechanisms (8) connected to the claw-shaped tube (3). A standard vacuum gauge (10) is screwed to the top of the limiting mechanism (8) connected to the bent tube (4). A sliding groove (11) is opened on the top surface of the support (1), and a protective mechanism (12) is locked inside the sliding groove (11).

2. A calibration structure for a vacuum gauge according to claim 1, characterized in that: The limiting mechanism (8) includes a limiting frame (801), which is fixed on the top surface of the hollow frame (7). A connector (802) is engaged inside the limiting frame (801). A set of cylindrical frames (803) are symmetrically fixed on both sides of the surface of the limiting frame (801). A set of T-shaped limiting rods (804) are symmetrically passed through the inside of the set of cylindrical frames (803). A handle (805) is fixedly connected to the outer end of the T-shaped limiting rod (804). A limiting ring plate (806) is fixedly sleeved on the surface of the T-shaped limiting rod (804). A limiting spring (807) is provided on one side of the limiting ring plate (806).

3. The calibration structure for a vacuum gauge according to claim 2, characterized in that: The surface of the connector (802) is provided with a limiting groove that matches the inner end of the T-shaped limiting rod (804).

4. The calibration structure for a vacuum gauge according to claim 2, characterized in that: The vacuum gauge to be tested (9) and the standard vacuum gauge (10) are respectively threaded to their corresponding connectors (802). Each connector (802) is connected to the transmission tube (6) through the limiting frame (801) and the hollow frame (7).

5. The calibration structure for a vacuum gauge according to claim 2, characterized in that: The T-shaped limiting rod (804) forms an elastic structure with the limiting ring plate (806), the limiting spring (807) and the cylinder frame (803), and the outer wall of the limiting ring plate (806) is in contact with the inner wall of the cylinder frame (803).

6. The calibration structure for a vacuum gauge according to claim 1, characterized in that: The protective mechanism (12) includes a slide (1201), which is movably locked inside the slide groove (11). A set of magnetic strips (1202) are symmetrically fitted on the front and rear surfaces of the slide (1201). Several slot frames (1203) are evenly fixed on the top of the slide (1201). A protective plate (1204) is attached to the top of the slot frame (1203). A handle (1205) is fixed to the middle of the top of the protective plate (1204). A guide rod (1206) is matched and locked inside the upper part of the slot frame (1203). An adjusting spring (1207) is connected to the bottom of the guide rod (1206).

7. The calibration structure for a vacuum gauge according to claim 6, characterized in that: The carriage (1201) forms a magnetic attraction structure with the slide groove (11) through the magnetic strip (1202).

8. The calibration structure for a vacuum gauge according to claim 6, characterized in that: The protective plate (1204) is connected to the slot frame (1203) by a guide rod (1206), an adjusting spring (1207), and a locking elastic structure. The guide rod (1206) and the protective plate (1204) are fixedly connected.

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