Rapid calibration connecting device of Pirani vacuum gauge

Abstract

The utility model provides a quick calibration connecting device of a Pirani vacuum gauge, which relates to the technical field of vacuum gauge connection and comprises a connecting box, a flange plate is arranged at one end of the connecting box, a rubber gasket is arranged at one end of the flange plate, a butt joint ring is arranged on the surface of the flange plate, and a connecting pipe is arranged at the other end of the connecting box. By the adoption of the protection assembly, in the using process, an external equipment port is inserted into the connecting column, fastening connection is achieved through rotation, during insertion, the external equipment port makes contact with the protection plate and pushes the protection plate to rotate upwards, meanwhile, a torsion spring and a guide rod are compressed to ensure that the torsion spring is kept stable when stressed, and deviation is avoided; the torsion spring drives the protection plate to automatically rebound to seal the port of the connecting column, so that dust and sundries are effectively prevented from entering, automatic opening and closing protection during connection of external equipment is realized, the connection stability is ensured, dust and dirt are effectively prevented, and the measurement precision and the service life of the vacuum gauge are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of vacuum gauge connection technology, and in particular to a rapid calibration connection device for a Pirani vacuum gauge. Background Technology

[0002] According to Chinese Patent Publication No. CN220437656U, an online calibration device for a vacuum gauge includes a vacuum gauge. A fixed cylinder is fixedly sleeved on the outer periphery of the vacuum gauge's detection head. A sealing mechanism is provided inside the fixed cylinder, and the sealing mechanism seals the opening at the bottom end of the fixed cylinder. This utility model relates to the technical field of online calibration devices for vacuum gauges. During the use of the vacuum gauge, this utility model allows for the formation of a closed space on the outer periphery of the vacuum gauge's detection head without disassembling the vacuum gauge. The pressure within this closed space is the same as the external atmospheric pressure, thus enabling normal calibration of the vacuum gauge. This eliminates the need to disassemble the vacuum gauge for calibration, allowing for direct online calibration. The device has a simple structure, is easy to operate, and hardly alters existing vacuum gauge calibration procedures, making it easy to learn.

[0003] However, the above-mentioned device has the following problems when in use: when the connection device is not connected to external equipment, the port exposed to the air is prone to accumulating dust and suspended particles. Long-term contact may cause contaminants to enter the interior, thereby affecting the stability of subsequent connections and the accuracy of signal transmission. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a rapid calibration connection device for a Pirani vacuum gauge.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: it includes a connecting box, one end of which is provided with a flange, one end of which is provided with a rubber gasket, and the surface of which is provided with a mating ring; the other end of the connecting box is provided with a connecting pipe.

[0006] Preferably, the top and bottom of the connecting box are provided with four sets of anti-slip grooves, and the four sets of anti-slip grooves are arranged in a straight line.

[0007] Preferably, one end of the connecting pipe is provided with a connecting post, and the connecting post has a connecting groove inside.

[0008] Preferably, the surface of the connecting groove is provided with a sealing ring, the interior of the connecting groove is threaded, and the inner wall of the connecting column is provided with a protective component.

[0009] Preferably, the protective component includes a fixing block, a guide rod, a torsion spring, and a protective plate. One end of the fixing block is disposed on the inner wall of the connecting column, and a spring-loaded groove is formed at the bottom of the fixing block. The two ends of the guide rod are disposed at both ends inside the spring-loaded groove.

[0010] Preferably, the inside of the torsion spring is sleeved on the surface of the guide rod, and the top of the torsion spring is located at the inner top of the rebound groove.

[0011] Preferably, the bottom of the torsion spring is located at the top of the protective plate, and the protective plate is movably connected to the interior of the connecting groove.

[0012] Beneficial effects

[0013] In this invention, a combination of a mating ring, a rubber gasket, a sealing ring, and a connecting post is used. The operator can quickly position the vacuum gauge probe using the mating ring and precisely align the flange with the vacuum gauge interface. The rubber gasket is placed between the flange and the vacuum gauge port to ensure a seal, while the connecting groove inside the connecting post facilitates the calibration and positioning of external equipment. The sealing ring is installed between the connecting post and the external equipment to further enhance the sealing effect and improve the reliability and ease of operation of the system.

[0014] In this invention, a protective component is used. During use, the external device port is inserted into the connecting post and a tight connection is achieved by rotation. When inserted, the external device port contacts the protective plate and pushes it to rotate upward, while compressing the torsion spring. The guide rod ensures that the torsion spring remains stable under force and avoids displacement. When the connection is disconnected, the torsion spring drives the protective plate to automatically rebound and close the connecting post port, effectively preventing dust and debris from entering. This achieves automatic opening and closing protection when connecting external devices, ensuring connection stability and effectively preventing dust and dirt, significantly improving the calibration and measurement accuracy and service life of the vacuum gauge. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall appearance of the present utility model;

[0016] Figure 2 This is a schematic diagram of the flange, rubber gasket, and mating ring of this utility model;

[0017] Figure 3 This is a top view of the present invention;

[0018] Figure 4 This is a schematic diagram of the internal structure of the connecting column of this utility model;

[0019] Figure 5 This is a schematic diagram of the inner side of the connecting column of this utility model.

[0020] Legend:

[0021] 1. Connecting box; 2. Rubber gasket; 3. Butt ring; 4. Connecting pipe; 5. Anti-slip groove; 6. Connecting column; 7. Sealing ring; 8. Protective components; 801. Fixing block; 802. Guide rod; 803. Torsion spring; 804. Protective plate; 9. Flange. Detailed Implementation

[0022] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0023] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1:

[0025] Reference Figure 1-5 This embodiment includes a connecting box 1, with a flange 9 at one end of the connecting box 1, a rubber gasket 2 at one end of the flange 9, a mating ring 3 on the surface of the flange 9, and the rubber gasket 2 at one end of the flange 9. The rubber gasket 2 is located in the mating ring 3. The rubber gasket 2 can enhance the sealing of the connection and reduce the risk of medium leakage, while the mating ring 3 helps to accurately position during installation and improve the accuracy of the connection.

[0026] A connecting tube 4 is provided at the other end of the connecting box 1 [1]. Four sets of anti-slip grooves 5 are provided at the top and bottom of the connecting box 1. The four sets of anti-slip grooves 5 are arranged in parallel in a straight line and are evenly distributed along the length of the connecting box 1. The design of the anti-slip grooves 5 can increase the friction between the hand and the connecting box 1, making it easier to grip and operate during installation or disassembly. A connecting post 6 is provided at the end of the connecting tube 4 away from the connecting box 1. Both the connecting box 1 and the connecting post 6 are rectangular structures. A connecting groove is provided inside the connecting post 6. A sealing ring 7 is provided on the surface of the connecting groove. The inside of the connecting groove is threaded. The sealing ring 7 can further improve the sealing performance of the connection, while the threaded treatment makes it easy to make a firm connection with other components. A connecting post 6 is provided in the inner wall. The system includes a protective component 8, which comprises a fixing block 801, a guide rod 802, a torsion spring 803, and a protective plate 804. The fixing block 801 is fixedly connected to the inner wall of the connecting column 6. A spring-loaded groove is formed at the bottom of the fixing block 801. The two ends of the guide rod 802 are located at the two ends inside the spring-loaded groove. The inside of the torsion spring 803 is sleeved on the surface of the guide rod 802. The top of the torsion spring 803 is located at the inner top of the spring-loaded groove. The bottom of the torsion spring 803 is located at the top of the protective plate 804. The shape and size of the protective plate 804 are adapted to the shape and size of the inside of the connecting groove. The connecting device is quickly connected to the vacuum gauge and external equipment through the flange 9 and the connecting column 6, respectively, reducing the risk of air leakage and time during calibration. Specific Implementation Example 2:

[0028] A rapid calibration connection device for a Pirani vacuum gauge, based on the basic structure in Specific Embodiment 1, further discloses the following: its working principle and steps are as follows: the operator quickly positions the vacuum gauge probe using the docking ring 3 and precisely aligns the flange 9 with the vacuum gauge interface. The rubber gasket 2 is placed between the flange 9 and the vacuum gauge port to ensure a seal. The connecting groove inside the connecting post 6 facilitates the calibration and positioning of external equipment. The sealing ring 7 is installed between the connecting post 6 and the external equipment. When the connecting groove is connected to the port of the external equipment, the port of the external equipment contacts the protective plate 804 and pushes it to rotate upward, while compressing the torsion spring 803. The guide rod 802 ensures that the torsion spring 803 remains stable under force and avoids displacement. When the connection is disconnected, the torsion spring 803 drives the protective plate 804 to automatically rebound and close the port of the connecting post 6.

[0029] In summary:

[0030] The system employs a combination of a mating ring 3, a rubber gasket 2, a sealing ring 7, and a connecting post 6. Operators can quickly position the vacuum gauge probe using the mating ring 3 and precisely align the flange 9 with the vacuum gauge interface. The rubber gasket 2 is placed between the flange 9 and the vacuum gauge port to ensure a seal. The connecting groove inside the connecting post 6 facilitates the calibration and positioning of external equipment. The sealing ring 7 is installed between the connecting post 6 and the external equipment, further enhancing the sealing effect and improving the system's reliability and ease of operation.

[0031] With the protective component 8, during use, the external device port is inserted into the connecting post 6 and a tight connection is achieved by rotation. When inserted, the external device port contacts the protective plate 804 and pushes it to rotate upward, while compressing the torsion spring 803. The guide rod 802 ensures that the torsion spring 803 remains stable under force and avoids displacement. When the connection is disconnected, the torsion spring 803 drives the protective plate 804 to automatically rebound and close the port of the connecting post 6, effectively preventing dust and debris from entering. This achieves automatic opening and closing protection when connecting external devices, ensuring connection stability and effectively preventing dust and dirt, significantly improving the calibration and measurement accuracy and service life of the vacuum gauge.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rapid calibration connection device for a Pirani vacuum gauge, comprising a connection box (1), characterized in that: One end of the connecting box (1) is provided with a flange (9), and a mating ring (3) is provided on the surface of the flange (9). The other end of the connecting box (1) is provided with a connecting pipe (4), and the end of the connecting pipe (4) away from the connecting box (1) is provided with a connecting post (6). A connecting groove is provided inside the connecting post (6), and a protective component (8) is provided in the inner wall of the connecting post (6). The protective component (8) includes a fixing block (801), a guide rod (802), and a torsion spring. (803) and protective plate (804), the fixing block (801) is fixedly connected to the inner wall of the connecting column (6), the bottom of the fixing block (801) is provided with a spring groove, the two ends of the guide rod (802) are set at the two ends inside the spring groove, the inside of the torsion spring (803) is sleeved on the surface of the guide rod (802), the top of the torsion spring (803) is set at the inner top of the spring groove, and the bottom of the torsion spring (803) is set at the top of the protective plate (804).

2. The rapid calibration connection device for a Pirani vacuum gauge according to claim 1, characterized in that: The top and bottom of the connecting box (1) are provided with four sets of anti-slip grooves (5), which are arranged in a straight line.

3. The rapid calibration connection device for a Pirani vacuum gauge according to claim 1, characterized in that: A rubber gasket (2) is provided at one end of the flange (9), and the rubber gasket (2) is located in the mating ring (3).

4. The rapid calibration connection device for a Pirani vacuum gauge according to claim 1, characterized in that: The surface of the connecting groove is provided with a sealing ring (7), and the inside of the connecting groove is threaded.

5. The rapid calibration connection device for a Pirani vacuum gauge according to claim 1, characterized in that: Both the connecting box (1) and the connecting column (6) are rectangular parallelepiped structures.

6. The rapid calibration connection device for a Pirani vacuum gauge according to claim 1, characterized in that: The shape and size of the protective plate (804) are adapted to the shape and size of the inside of the connecting groove.

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