Portable safety valve verification device

Abstract

The utility model relates to the technical field of safety valve verification, and discloses a portable safety valve verification device which comprises a nitrogen cylinder, the outer side of the nitrogen cylinder is slidably connected with a protection mechanism, the top of the nitrogen cylinder is fixedly connected with a detection mechanism, the top of the detection mechanism is fixedly connected with a connecting mechanism, the connecting mechanism comprises a fixing column, and the fixing column is fixedly connected with the protection mechanism. The bottom of the fixed column is fixedly connected to the outer side of the detection mechanism, a rotating column is slidably connected to the interior of the fixed column, a limiting block is fixedly connected to the outer side of the rotating column, a sealing assembly is fixedly connected to the interior of the rotating column, and the sealing assembly comprises a sealing shell. The outer side of the sealing shell is fixedly connected to the interior of the rotating column. According to the utility model, the mounting and the taking-out of the rotating column can be realized, so that the butt joint and the separation of the air outlet steel pipe can be quickly completed, complicated tools and tedious operation procedures are not needed, the time and the labor cost are saved, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to safe valve calibration technical field especially relates to a portable safe valve calibration device. BACKGROUND

[0002] The portable safe valve calibration device is a movable on-site calibration equipment, is widely used in industrial production, special equipment detection and laboratory scientific research etc. field, has on-site calibration convenient, improves security, reduces maintenance cost, data accurate and reliable and adaptability strong and many advantages.

[0003] Through the retrieval, the patent of China announcement number: CN219532476U discloses a kind of portable safe valve calibration device, including nitrogen cylinder, nitrogen cylinder top end fixedly connected with gas outlet steel pipe, pressure gauge and pressure reducing valve are fixedly installed on gas outlet steel pipe, gas outlet steel pipe top is equipped with connecting assembly, connecting assembly includes second joint, high-pressure hose, first steel pipe, two second steel pipes, first safety valve interface and second safety valve interface, high-pressure hose one end is fixedly communicated with second joint.The utility model connects flange type safety valve with first safety valve interface, screw type safety valve with second safety valve interface by rotating second joint and making it extend into first joint, so that second joint is fixed with first joint, and is disassembled in the same way, the pressure in nitrogen cylinder is observed by pressure gauge, safety valve is calibrated by pressure reducing valve, simple structure, convenient to carry, save a lot of time cost, good use effect.

[0004] The beneficial effect in the above patent specification mentions "rotating the second joint and extending it into the first joint, so that the second joint is fixed with the first joint, the flange type safety valve is connected with the first safety valve interface, the screw type safety valve is connected with the second safety valve interface, and is disassembled in the same way, the pressure in the nitrogen cylinder is observed by the pressure gauge, the safety valve is calibrated by the pressure reducing valve, the structure is simple, convenient to carry, saves a lot of time cost, and the use effect is good". Although the above patent can realize installation or disassembly, it cannot realize the effect of sealed installation. Therefore, a portable safe valve calibration device is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a kind of portable safe valve calibration device, aims at improving the problem that cement mortar cannot be avoided sticking in the inner wall of stirring barrel in prior art.

[0006] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0007] A kind of portable safe valve calibration device, including nitrogen cylinder, the outside of the nitrogen cylinder is slidably connected with protection mechanism, the top of the nitrogen cylinder is fixedly connected with detection mechanism, the top of the detection mechanism is fixedly connected with connecting mechanism;

[0008] The connecting mechanism comprises a fixed column, the bottom of the fixed column is fixedly connected to the outside of the detection mechanism, a rotating column is slidably connected to the inside of the fixed column, a limiting block is fixedly connected to the outside of the rotating column, and a sealing assembly is fixedly connected to the inside of the rotating column;

[0009] Through the above technical scheme: when in use, the nitrogen cylinder is placed in the protection mechanism, the protection mechanism is self-adaptively adjusted through sliding cooperation to provide stable protection for the nitrogen cylinder, the detection mechanism monitors the state of the nitrogen cylinder in real time, when the gas outlet equipment needs to be connected, the rotating column is aligned with the fixed column, the limiting block is slid into the clamping groove, and the sealing ring in the sealing assembly is extruded into the sealing shell during the insertion of the rotating column, after the rotating column is inserted in place and released, the spring in the sealing assembly pushes the sealing ring to tightly adhere to the inner wall of the fixed column to realize sealing, and when disassembled, the rotating column is rotated to drive the limiting block to rotate out of the clamping groove, so that the nitrogen cylinder can be separated, which is convenient for connection and sealing.

[0010] As a further description of the above technical scheme:

[0011] The sealing assembly comprises a sealing shell, the outside of the sealing shell is fixedly connected to the inside of the rotating column, a plurality of springs two are fixedly connected to the inside of the sealing shell, and a sealing ring is fixedly connected to the other end of the spring two;

[0012] Through the above technical scheme: when installed, the rotating column is inserted into the fixed column, the sealing ring is extruded into the sealing shell, and the compression spring is compressed, after the rotating column is inserted in place, the spring restores the deformation, pushes the sealing ring to tightly adhere to the inner wall of the fixed column, realizes sealing, when disassembled, the rotating column is rotated, the limiting block is separated from the clamping groove, the rotating column is taken out, and the sealing ring restores the original state under the action of the spring, which is convenient for next use.

[0013] As a further description of the above technical scheme:

[0014] The protection mechanism comprises a protection frame, the inside of the protection frame is slidably connected to the outside of the nitrogen cylinder, a plurality of sliding rods are slidably connected to the inside of the protection frame, one end of the sliding rod is fixedly connected with an extrusion plate, and the inner side of the extrusion plate is fixedly connected with a spring one;

[0015] Through the above technical scheme: the nitrogen cylinder is placed in the protection frame, the bottle body extrudes the extrusion plate, drives the sliding rod to slide in the protection frame, slides to a suitable position, and the extrusion plate and the sliding rod form a stable limiting structure, which is attached to the nitrogen cylinder from multiple directions, self-adaptively adjusts the position, provides stable protection for nitrogen cylinders of different sizes, and prevents shaking or impact of external force.

[0016] As a further description of the above technical scheme:

[0017] The inside of the fixed column is provided with a clamping groove, and the outside of the limiting block is slidably connected in the inside of the clamping groove.

[0018] Through the above technical scheme: when installing, the limiting block is inserted into the clamping groove of the fixed column, and after sliding into place, the limiting block is clamped into the clamping groove, thereby realizing the stable connection of the rotating column and the fixed column. When disassembling, the rotating column is rotated to make the limiting block turn out of the clamping groove, thereby releasing the locking state of the two, and the rotating column can be pulled out of the fixed column, thereby completing the quick disassembly and fixation.

[0019] As a further description of the above technical scheme:

[0020] The bottom of the sealing ring is slidably connected in the inside of the fixed column, and the outside of the sealing ring is slidably connected in the inside of the sealing shell.

[0021] Through the above technical scheme: when the rotating column is inserted into the fixed column, the sealing ring is extruded and slides into the sealing shell along the inner wall, tightly fits the inner wall of the fixed column, after installation, the spring pushes the sealing ring to reset, expands outward and abuts against the inner wall of the fixed column, thereby forming a seal to prevent gas leakage. When disassembling the rotating column, the sealing ring slides and releases the sealing state, thereby facilitating the separation of the components.

[0022] As a further description of the above technical scheme:

[0023] The end of the sliding rod away from the pressing plate is fixedly connected with a limiting disc, and the inside of the limiting disc is slidably connected to the outside of the protection frame.

[0024] Through the above technical scheme: when the nitrogen cylinder is placed in the protection frame, the pressing plate is pushed to drive the sliding rod to move backward, and the limiting disc slides along the outside of the protection frame. When the nitrogen cylinder is in place, the limiting disc abuts against the protection frame to limit the movement of the sliding rod, so that the pressing plate stably clamps the nitrogen cylinder, thereby avoiding the excessive sliding of the sliding rod and ensuring the effective fixation and protection of the protection mechanism on the nitrogen cylinder of different sizes.

[0025] As a further description of the above technical scheme:

[0026] The other end of the spring is fixedly connected to the inside of the protection frame, and the inside of the pressing plate is slidably connected to the outside of the nitrogen cylinder.

[0027] Through the above technical scheme: when the nitrogen cylinder is placed in the protection frame, the bottle body extrudes the inside of the pressing plate to drive the sliding rod to slide to the inside of the protection frame. During the sliding process, the pressing plate always abuts against the outside of the nitrogen cylinder. When sliding to the appropriate position, the pressing plate is fixed through the connecting structure on the inside of the protection frame, thereby realizing the stable clamping and protection of the nitrogen cylinder.

[0028] As a further description of the above technical scheme:

[0029] The detection mechanism comprises a pressure gauge, the bottom of the pressure gauge is fixedly connected to the top of the nitrogen cylinder, and a pressure valve is fixedly connected to the top of the pressure gauge.

[0030] Through the above technical scheme, when the pressure in the nitrogen cylinder changes, the pressure value is displayed in real time through the pressure gauge connected to the top, when the pressure exceeds the set value, the top pressure valve automatically opens to release pressure, preventing danger caused by excessive pressure, and when the pressure decreases to a safe range, the pressure valve is closed, and the pressure gauge continues to monitor, ensuring the safety of the nitrogen cylinder.

[0031] The utility model has the advantages of the following beneficial effects:

[0032] 1、 the utility model discloses, through fixed column cooperation rotation column, rotation column cooperation limit block and sealing shell, sealing shell cooperation spring, spring cooperation sealing ring, to realize the quick sealing butt joint of the gas outlet steel pipe, this design makes the installation and dismounting process simple and fast of the gas outlet steel pipe, only need to make the limit block with the clamping slot of fixed column alignment sliding, can realize the installation and taking out of rotation column, to quickly complete the butt joint and separation of the gas outlet steel pipe, need not complicated tool and tedious operation process, save time and manpower cost, improve work efficiency.

[0033] 2、 the utility model discloses, through protection frame cooperation sliding rod, sliding rod cooperation extrusion plate and limit disc, extrusion plate cooperation, to realize the protection effect to different size's nitrogen cylinder, can adjust according to the size of different nitrogen cylinder, whether it is smaller size or larger size's nitrogen cylinder, can make protection frame closely adhere to nitrogen cylinder through the action of sliding rod and extrusion plate, provide suitable protection, improve the versatility and scope of application of device. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a three-dimensional schematic view of a portable safety valve calibration device provided by the utility model;

[0035] Figure 2 It is a structural schematic view of a protection frame of a portable safety valve calibration device provided by the utility model;

[0036] Figure 3 It is Figure 2 It is an enlarged view of position A in Fig.

[0037] Figure 4 It is Figure 2 It is an enlarged view of position B in Fig.

[0038] LEGEND:

[0039] 1, nitrogen cylinder; 2, protection mechanism; 21, protection frame; 22, sliding rod; 23, extrusion plate; 24, spring one; 25, limiting disc; 3, detection mechanism; 31, pressure gauge; 32, pressure valve; 4, connecting mechanism; 41, fixed column; 42, rotating column; 43, sealing assembly; 431, sealing shell; 432, spring two; 433, sealing ring; 44, limiting block. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0041] Reference Figures 1 to 3 An embodiment provided by the utility model: a portable safety valve calibration device, including nitrogen cylinder 1, nitrogen cylinder 1 is as the core container of storage nitrogen, provides gas source support for all kinds of scenes needing nitrogen, the outside of nitrogen cylinder 1 is slidably connected with protection mechanism 2, protection mechanism 2 can flexibly slide outside nitrogen cylinder 1, can closely fit the shape of nitrogen cylinder 1, provides buffer protection for nitrogen cylinder 1 in the process of carrying and storing, effectively resists external impact and friction, avoids bottle body damage;

[0042] The top of nitrogen cylinder 1 is fixedly connected with detection mechanism 3, detection mechanism 3 is installed at the key position of the top of nitrogen cylinder 1, can monitor important parameters such as the pressure and gas concentration in nitrogen cylinder 1 in real time, discovers abnormal conditions in time, provides data support for the safe use of nitrogen cylinder 1, the top of detection mechanism 3 is fixedly connected with connecting mechanism 4, connecting mechanism 4 plays the role of connecting detection mechanism 3 and external equipment or pipeline stably, guarantees the smooth progress of gas transmission and data interaction;

[0043] Connecting mechanism 4 includes fixed column 41, fixed column 41 is as an important component of connecting mechanism 4, and its stable structure provides installation basis for parts, guarantees the stability of connecting mechanism 4 as a whole, the inside of fixed column 41 is provided with a clamping groove, the design of clamping groove can accurately cooperate with limiting block 44, provides reliable guarantee for the installation and positioning of rotating column 42, ensures that connecting mechanism 4 remains stable in the process of connection and disassembly, the bottom of fixed column 41 is fixedly connected outside detection mechanism 3, connects mechanism 4 and detection mechanism 3 firmly, makes them form an organic whole, guarantees the stable transmission process of gas from nitrogen cylinder 1 to connecting mechanism 4 through detection mechanism 3 without leakage;

[0044] The fixed column 41 is internally slidably connected to a rotating column 42. The rotating column 42 can slide flexibly inside the fixed column 41, which facilitates connection and separation with the fixed column 41, meets the usage needs in different scenarios, and improves the convenience of connection. The rotating column 42 is fixedly connected to a limiting block 44. The limiting block 44 cooperates with the slot inside the fixed column 41. When the rotating column 42 is installed in place, the limiting block 44 is embedded in the slot, which effectively prevents the rotating column 42 from accidentally loosening or falling off, and enhances the connection reliability of the connection mechanism 4.

[0045] The outer side of the limiting block 44 is slidably connected to the inside of the slot. This sliding connection allows the limiting block 44 to easily snap into or out of the slot, which is convenient for installation and disassembly, and can provide sufficient fastening force during connection to ensure the stability of the connection. The rotating column 42 is fixedly connected to the inside of the sealing component 43. The sealing component 43 can form a good sealing effect when the rotating column 42 is connected to the fixed column 41, effectively preventing gas leakage and ensuring the safety and integrity of the nitrogen transmission process.

[0046] Specifically, the device centers on a nitrogen cylinder 1, with various components working together to ensure its safety and gas transmission. The protection mechanism 2, through components such as a sliding protective frame 21 and a sliding rod 22, fits tightly against the nitrogen cylinder 1, buffering impacts and resisting friction during handling and storage, thus protecting the cylinder. The detection mechanism 3 is installed on the top of the cylinder, using a pressure gauge 31 to monitor parameters such as pressure and gas concentration inside the cylinder in real time. The pressure valve 32 automatically adjusts when the pressure is abnormal to ensure safety. In the connection mechanism 4, the fixed column 41 and the rotating column 42 cooperate through a slot and a limiting block 44 to achieve flexible installation, disassembly, and stable connection. The parts inside the sealing component 43 push the sealing ring 433 to fit tightly, preventing gas leakage and ensuring that nitrogen is stably transmitted from the cylinder to external equipment through the detection mechanism 3, meeting the gas needs of various scenarios.

[0047] The sealing assembly 43 includes a sealing shell 431. The outer side of the sealing shell 431 is fixedly connected to the inside of the rotating column 42, providing a stable mounting frame for the entire sealing assembly 43 and ensuring that the positions of each component are fixed and do not shift during operation. Multiple springs 432 are fixedly connected inside the sealing shell 431. These springs 432 play a role in dynamically adjusting the sealing pressure. When the rotating column 42 is connected to the fixed column 41, the elastic force can be flexibly adjusted according to the change in the relative position of the two.

[0048] The other end of the spring two 432 is fixedly connected with a sealing ring 433. The elastic force generated by the spring two 432 continuously acts on the sealing ring 433, pushes the sealing ring 433 to tightly fit the inner wall of the fixed column 41, effectively fills the gap between the two, greatly reduces the gas leakage, and the bottom of the sealing ring 433 is slidingly connected in the inner part of the fixed column 41. Such sliding connection design enables the sealing ring 433 to flexibly adjust its posture according to the shape and position of the inner wall of the fixed column 41, and always maintains a good contact state with the fixed column 41, further enhancing the sealing performance.

[0049] The outer side of the sealing ring 433 is slidingly connected in the inner part of the sealing shell 431. The sealing shell 431 plays a guiding and limiting role on the movement of the sealing ring 433. Under the pushing of the spring two 432, the sealing ring 433 can stably slide in the sealing shell 431 and accurately form a sealing surface with the inner wall of the fixed column 41, ensuring that the nitrogen will not leak from the connection during transmission, and ensuring the sealing performance and reliability of the connecting mechanism 4.

[0050] Specifically, in the sealing assembly 43, the sealing shell 431 is fixed in the rotating column 42 to provide a stable frame for the assembly. The inner spring two 432 can adjust the elastic force according to the relative position change between the rotating column 42 and the fixed column 41, push the sealing ring 433, and the bottom of the sealing ring 433 is slidingly connected with the fixed column 41, which can flexibly fit the inner wall of the fixed column 41 to enhance the sealing. The outer side of the sealing ring 433 is slidingly connected with the sealing shell 431 and is guided and limited by the sealing shell 431. Under the action of the spring elastic force, the sealing ring 433 can stably slide and accurately form a sealing surface with the inner wall of the fixed column 41, effectively preventing the nitrogen from leaking from the connection during transmission, and ensuring the sealing reliability of the connecting mechanism 4.

[0051] Referring to Figure 1 , Figure 2 and Figure 4 , the protection mechanism 2 includes a protection frame 21. The inner part of the protection frame 21 is slidingly connected to the outer side of the nitrogen cylinder 1. This design enables the protection frame 21 to tightly fit the nitrogen cylinder 1 and provide all-round protection for it, effectively resisting external collision and friction during handling and storage. The inner part of the protection frame 21 is slidingly connected with a plurality of sliding rods 22. These sliding rods 22 can flexibly slide in the protection frame 21 and can self-adaptively adjust the position when different sizes of nitrogen cylinders 1 are placed, thereby adapting to nitrogen cylinders 1 of various specifications and improving the versatility of the protection mechanism 2.

[0052] One end of the sliding rod 22 is fixedly connected with the extrusion plate 23, the extrusion plate 23 can closely adhere to the outside of the nitrogen cylinder 1 along with the sliding of the sliding rod 22, uniformly dispersing the impact force applied from the outside, avoiding the nitrogen cylinder 1 from being damaged due to excessive local force, the inside of the extrusion plate 23 is slidingly connected to the outside of the nitrogen cylinder 1, this sliding connection mode ensures that the extrusion plate 23 can fully contact the surface of the nitrogen cylinder 1 and will not hinder the sliding of the protection frame 21 relative to the nitrogen cylinder 1, ensuring the smooth operation of the protection mechanism 2, the end of the sliding rod 22 away from the extrusion plate 23 is fixedly connected with the limiting disc 25, the limiting disc 25 plays a key limiting role, which can prevent the sliding rod 22 from accidentally coming out of the inside of the protection frame 21, ensuring the integrity and stability of the structure of the entire protection mechanism 2;

[0053] The inside of the limiting disc 25 is slidingly connected to the outside of the protection frame 21, which enables the limiting disc 25 to maintain good cooperation with the protection frame 21 when moving along with the sliding rod 22, making the sliding process of the sliding rod 22 more stable and not appearing shaking or jamming phenomenon, the inside of the extrusion plate 23 is fixedly connected with the spring 24, the other end of the spring 24 is fixedly connected to the inside of the protection frame 21, the spring 24 acts as a buffer element between the extrusion plate 23 and the protection frame 21, which can effectively absorb energy when the extrusion plate 23 is impacted by external force, further reducing the impact of the impact force on the nitrogen cylinder 1, and strengthening the protection effect;

[0054] Specifically, the protection mechanism 2 realizes protection of the nitrogen cylinder 1 through the coordinated operation of various components, the protection frame 21 is slidingly sleeved on the outside of the nitrogen cylinder 1 and closely fits the bottle body, resisting external collision and friction during transportation and storage, the sliding rod 22 inside the protection frame 21 can slide flexibly and automatically adjust the position according to the size of the nitrogen cylinder 1, adapting to various specifications and improving universality, the extrusion plate 23 at one end of the sliding rod 22 slides along with it, closely adheres to the nitrogen cylinder 1, uniformly disperses the impact force and avoids local damage to the bottle body, and the sliding connection between the extrusion plate 23 and the nitrogen cylinder 1 ensures flexible operation, the limiting disc 25 at the other end of the sliding rod 22 is slidingly connected to the inside of the protection frame 21, preventing the sliding rod 22 from coming out and ensuring the stability of the structure, the spring 24 connected between the extrusion plate 23 and the inside of the protection frame 21 acts as a buffer element, absorbing energy when the extrusion plate 23 is impacted, further reducing the impact of external force on the nitrogen cylinder 1, and protecting the nitrogen cylinder 1 in all directions.

[0055] The detection mechanism 3 includes a pressure gauge 31, the bottom of the pressure gauge 31 is fixedly connected to the top of the nitrogen cylinder 1, this installation mode enables the pressure gauge 31 to monitor the pressure condition inside the nitrogen cylinder 1 in real time and accurately, intuitively presenting the pressure data in the bottle, which is convenient for the operator to timely grasp the pressure dynamics of the nitrogen cylinder 1, the bottom of the pressure gauge 31 is fixedly connected to the top of the nitrogen cylinder 1;

[0056] The top of the pressure gauge 31 is fixedly connected with a pressure valve 32, which is closely connected with the pressure gauge 31, and when the pressure gauge 31 monitors that the pressure in the nitrogen cylinder 1 exceeds the safety threshold, the pressure valve 32 can quickly respond to control the pressure in the safe range by automatically adjusting the gas discharge amount, effectively avoiding the safety hazard caused by excessive pressure, and ensuring the safety and stability of the use of the nitrogen cylinder 1.

[0057] Specifically, the detection mechanism 3 is composed of a pressure gauge 31 and a pressure valve 32. The pressure gauge 31 is fixed on the top of the nitrogen cylinder 1, which can accurately monitor the pressure in the bottle in real time and intuitively present the data. The pressure valve 32 is connected with the pressure gauge 31, and when the pressure exceeds the safety threshold, it can quickly respond to automatically adjust the exhaust amount to ensure the safety and stability of the use of the nitrogen cylinder 1.

[0058] Working principle: when the nitrogen cylinder 1 needs to be protected, it can be placed in the protection frame 21, and the protection frame 21 is provided with a plurality of sliding rods 22. When the protection frame 21 enters the inside of the protection frame 21, the sliding rod 22 at one end of the extrusion plate 23 is extruded backward, so that the sliding rod 22 slides outward, and the rear side of the extrusion plate 23 is connected with a spring 24. When the nitrogen cylinder 1 extrudes the sliding rod 22 to the appropriate position, the spring 24 can be used to limit the nitrogen cylinder 1. At this time, different sizes of nitrogen cylinders 1 can be protected.

[0059] When the gas outlet steel pipe needs to be disassembled, the gas outlet steel pipe can be rotated to drive the rotating column 42, and the outer side of the rotating column 42 is connected with the limiting block 44. At this time, the limiting block 44 can be driven to separate from the clamping groove inside the fixed column 41. At this time, the rotating column 42 can be taken out from the inside of the fixed column 41. When the gas outlet steel pipe needs to be installed again, the outer side of the limiting block 44 can be aligned with the clamping groove inside the fixed column 41, and the limiting block 44 can be slid into the clamping groove. When the rotating column 42 slides into the fixed column 41, the sealing ring 433 connected inside the rotating column 42 is extruded into the sealing shell 431. When the limiting block 44 slides into the clamping groove, the gas outlet steel pipe can be released. At this time, the plurality of springs 432 connected inside the sealing ring 433 can extrude the sealing ring 433 outward, so that the sealing ring 433 abuts against the inside of the fixed column 41, so that the limiting block 44 is connected more tightly in the clamping groove.

[0060] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, the made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A portable safety valve calibration device, comprising a nitrogen cylinder (1), characterized in that: A protective mechanism (2) is slidably connected to the outside of the nitrogen cylinder (1), a detection mechanism (3) is fixedly connected to the top of the nitrogen cylinder (1), and a connecting mechanism (4) is fixedly connected to the top of the detection mechanism (3). The connecting mechanism (4) includes a fixed column (41), the bottom of which is fixedly connected to the outside of the detection mechanism (3), a rotating column (42) is slidably connected inside the fixed column (41), a limiting block (44) is fixedly connected to the outside of the rotating column (42), and a sealing assembly (43) is fixedly connected inside the rotating column (42).

2. The portable safety valve calibration device according to claim 1, characterized in that: The sealing assembly (43) includes a sealing shell (431), the outer side of which is fixedly connected to the inside of the rotating column (42), and a plurality of springs (432) are fixedly connected inside the sealing shell (431), with a sealing ring (433) fixedly connected to the other end of the springs (432).

3. The portable safety valve calibration device according to claim 1, characterized in that: The protective mechanism (2) includes a protective frame (21), which is slidably connected to the outside of the nitrogen cylinder (1). Multiple sliding rods (22) are slidably connected to the inside of the protective frame (21). One end of the sliding rod (22) is fixedly connected to a compression plate (23), and a spring (24) is fixedly connected to the inside of the compression plate (23).

4. The portable safety valve calibration device according to claim 1, characterized in that: The fixed column (41) has a slot inside, and the outer side of the limiting block (44) is slidably connected to the inside of the slot.

5. A portable safety valve calibration device according to claim 2, characterized in that: The bottom of the sealing ring (433) is slidably connected to the inside of the fixed post (41), and the outer side of the sealing ring (433) is slidably connected to the inside of the sealing shell (431).

6. A portable safety valve calibration device according to claim 3, characterized in that: The end of the sliding rod (22) away from the extrusion plate (23) is fixedly connected to a limiting disc (25), and the inner side of the limiting disc (25) is slidably connected to the outer side of the protective frame (21).

7. A portable safety valve calibration device according to claim 3, characterized in that: The other end of the spring (24) is fixedly connected to the inner side of the protective frame (21), and the inner side of the compression plate (23) is slidably connected to the outer side of the nitrogen cylinder (1).

8. The portable safety valve calibration device according to claim 1, characterized in that: The detection mechanism (3) includes a pressure gauge (31), the bottom of which is fixedly connected to the top of the nitrogen cylinder (1), and a pressure valve (32) is fixedly connected to the top of the pressure gauge (31).

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