Sealing plug for shock-proof pressure gauge

Abstract

The invention provides a sealing plug for a shock-proof pressure gauge, and the sealing plug comprises a sealing structure which is detachably installed at a ventilation hole in the top of the shock-proof pressure gauge, and the sealing structure comprises a ventilation air path which is communicated with the ventilation hole in the top of the shock-proof pressure gauge and is used for forming an air path which is communicated with the environment atmosphere in the shock-proof pressure gauge in an open state; the switching device is used for controlling the opening or closing of the ventilation gas path; the dustproof device can cover an air channel outlet of the ventilation air channel, and the dustproof device is used for preventing external dust from entering the ventilation air channel. The sealing structure can be a metal plug or a rubber plug, the sealing plug can keep air pressure balance inside and outside the pressure gauge in use, the vent hole is sealed to prevent the damping liquid from leaking when the sealing plug is not needed, dust is effectively prevented from entering the pressure gauge, the service life of the shock-proof pressure gauge is further prolonged, and the measurement precision of the shock-proof pressure gauge is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing plug equipment for shock-proof pressure gauges, and in particular to a sealing plug for shock-proof pressure gauges. Background Art

[0002] Vibration-resistant pressure gauges are commonly used in industry. Their appearance is similar to that of ordinary pressure gauges, and the gauge case is filled with damping fluid (silicone oil or glycerin). During installation, the rubber plug on the top needs to be cut off to align the pressure inside the gauge with the ambient atmospheric pressure. This rubber plug, also known as the vent, not only ensures stable internal pressure and gauge accuracy, but also serves as a safety feature, preventing the gauge from bursting. However, once the plug is cut, it cannot be reinstalled, making it impossible to disassemble and store. Furthermore, routine disassembly and movement of the gauge can lead to leakage. Furthermore, existing sealing structures generally lack effective dust protection measures, allowing dust and foreign matter in the operating environment to easily enter the vent, contaminating the damping fluid or clogging it, thereby affecting the normal operation of the pressure gauge. Most existing sealing structures lack flexible switching control mechanisms, making it impossible to easily adjust the ventilation status according to actual needs, making them inconvenient to use.

[0003] Therefore, the existing technology needs to be further developed. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above technical deficiencies and provide a sealing plug for a shock-resistant pressure gauge to solve the problems existing in the prior art.

[0005] To achieve the above technical objectives, according to a first aspect of the present invention, there is provided a sealing plug for a seismic-resistant pressure gauge, comprising a sealing structure detachably mounted at a vent hole at the top of the seismic-resistant pressure gauge, the sealing structure comprising: The ventilation gas path is connected to the vent hole on the top of the shock-resistant pressure gauge and is used to form a gas path connecting the interior of the shock-resistant pressure gauge to the ambient atmosphere when in the open state; A switch device for controlling the opening or closing of the ventilation gas path; A dustproof device, wherein the dustproof device can cover the air path outlet of the ventilation air path, and the dustproof device is used to prevent external dust from entering the ventilation air path.

[0006] Specifically, the ventilation air path forms an air path connecting the interior of the shock-resistant pressure gauge to the ambient atmosphere when in the open state, so as to keep the internal and external air pressures of the shock-resistant pressure gauge consistent; The vent air path seals the vent hole in a closed state to prevent leakage of the damping fluid inside the seismic-resistant pressure gauge.

[0007] Specifically, the sealing structure is a metal plug including a base, and the base is fixed to both ends of the vent hole at the top of the seismic-resistant pressure gauge by screws.

[0008] Specifically, the switch device is a switch screw, a ventilation space is provided in the middle of the base, and a thread is provided on the inner wall of the ventilation space. The switch screw is fixedly connected to the base by a thread. The switch screw adjusts the gap between the switch screw and the base by rotating to control the opening or closing of the ventilation path, thereby controlling the opening or closing of the vent hole of the seismic-resistant pressure gauge.

[0009] Specifically, the method of controlling the opening or closing of the ventilation path by rotating the switch screw to adjust the gap between the switch screw and the base includes: When the switch screw is rotated to the upper limit position, a gap is formed between the switch screw and the base, forming a ventilation path, that is, the ventilation path is in an open state at this time; When the switch screw is rotated to the lowering limit position, the switch screw and the base are closed, and the ventilation air path is in a closed state.

[0010] Specifically, the dustproof device is a dustproof cover, which covers the air outlet of the ventilation air path and is used to prevent external dust from entering the ventilation air path.

[0011] Specifically, the sealing structure is a rubber plug including a rubber handle, which is used to be inserted into the vent hole. A ventilation air path is provided inside the rubber handle, which is connected to the vent hole and to the ambient atmosphere through an air path outlet.

[0012] Specifically, the switch device is a raised ring, which is arranged on the surface of the rubber handle close to the vent hole of the shock-resistant pressure gauge and below the air path outlet. The diameter of the raised ring is larger than the diameter of the vent opening, and the opening or closing of the ventilation path is controlled by adjusting the position of the raised ring clamping.

[0013] Specifically, the dustproof device is a dustproof cover, which is arranged on the top of the rubber handle and fixedly connected to the rubber handle. The dustproof cover is used to cover the air outlet of the ventilation air path to prevent external dust from entering the ventilation air path.

[0014] Specifically, the method of controlling the opening or closing of the ventilation path by adjusting the position of the raised ring engagement includes: When the rubber handle is pressed to the first position, the raised ring is engaged with the vent hole, the air path outlet is in contact with the ambient atmosphere, and the air path inside the rubber handle is in an open state; When the rubber handle is pressed to the second position, the raised ring contacts the inside of the vent hole, and the air path outlet is not in contact with the ambient atmosphere, so the air path inside the rubber handle is in a closed state.

[0015] Beneficial effects: The present invention provides a sealing plug for a shock-resistant pressure gauge, comprising a sealing structure that is detachably mounted at the air vent at the top of the shock-resistant pressure gauge, and by providing an air vent connected to the air vent at the top of the shock-resistant pressure gauge, an air path is formed inside the shock-resistant pressure gauge that is connected to the ambient atmosphere when the gauge is open; a switch device is used to control the opening or closing of the air vent, and a dust-proof device is designed to cover the air path outlet of the air vent, thereby blocking external dust from entering the air vent, solving the problem that traditional rubber plugs cannot be reused after being cut open, and can effectively prevent foreign matter such as external dust from entering the interior of the pressure gauge. At the same time, the air vent can be closed when not in use to prevent leakage of internal damping fluid, making the shock-resistant pressure gauge more convenient for inspection and maintenance or when it needs to be disassembled for storage, effectively reducing the leakage problem caused by improper placement, greatly extending the service life of the pressure gauge, and further improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a seismic-resistant pressure gauge provided in a specific embodiment of the present invention; Figure 2 is a schematic structural diagram of a metal plug provided in a specific embodiment of the present invention; Figure 3 is a top view of a dust cover provided in a specific embodiment of the present invention; Figure 4 Schematic diagram of the structure of the rubber stopper provided in a specific embodiment of the present invention; Figure 5 2 is a schematic structural diagram of a rubber sealing seat provided in a specific embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the rubber stopper in use provided in a specific embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the rubber stopper provided in a specific embodiment of the present invention when not in use; Figure 8 This is a schematic structural diagram of a rubber stopper dust cover and a rubber sealing seat in a state of close contact with each other provided in a specific embodiment of the present invention; The reference numerals of the above drawings are as follows: 1. Vent; 2. Ventilation air path; 3. Air path outlet; 4. Base; 5. Switch screw; 6. Ventilation space; 7. Dust cover; 8. Rubber handle; 9. Raised ring; 10. Dust cover; 11. Rubber sealing seat; 12. Groove; 13. Through hole; 14. Seismic pressure gauge; 15. Damping fluid; 16. Slot; 17. Filter. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only reference to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the invention.

[0018] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0019] Example 1 See also Figure 1-Figure 2 This embodiment provides a sealing plug for a shock-resistant pressure gauge, including a sealing structure that can be detachably mounted at the air vent 1 on the top of the shock-resistant pressure gauge 14. The sealing structure includes a ventilation air path 2, a switch device, and a dustproof device. The ventilation air path 2 is connected to the air vent 1 on the top of the shock-resistant pressure gauge 14, and is used to form an air path inside the shock-resistant pressure gauge 14 that is connected to the ambient atmosphere when in the open state. The switch device is used to control the opening or closing of the ventilation air path 2. The dustproof device can cover the ventilation air path 2 to prevent external dust from entering the ventilation air path 2. The present invention ensures a stable internal air pressure through the switch device, thereby ensuring the accuracy of the measurement of the shock-resistant pressure gauge 14, greatly improving the safety of the present invention, avoiding the pressure gauge from bursting, and facilitating storage after disassembly. At the same time, the ventilation hole 1 can be closed when not in use to avoid external dust from entering and prevent leakage during movement. The dustproof device can cover the air path outlet 3 to protect the ventilation air path 2 from being affected by external dust and impurities, thereby greatly improving the usability and reliability of the present invention.

[0020] Furthermore, when open, vent line 2 forms an air path connecting the interior of shock-resistant pressure gauge 14 to the ambient atmosphere, maintaining the internal and external pressures consistent. This is crucial for the proper functioning of shock-resistant pressure gauge 14, as the balance of internal and external pressures ensures measurement accuracy. When the ambient pressure changes, opening vent line 2 allows the internal pressure of shock-resistant pressure gauge 14 to remain consistent with the external pressure, avoiding measurement errors caused by pressure differences.

[0021] For further information, see Figure 1 and Figure 2When closed, the vent 2 seals the vent hole 1 to prevent leakage of the damping fluid 15 within the shock-resistant pressure gauge 14. The shock-resistant pressure gauge 14 is typically filled with damping fluid 15, which reduces vibration of the pressure gauge pointer and stabilizes the reading. If the vent hole 1 is not effectively sealed, the damping fluid 15 may leak out of the vent hole 1, causing the shock-resistant pressure gauge 14 to lose its shock-resistant function, affecting measurement accuracy and service life.

[0022] See also Figure 2 In this embodiment, the sealing structure is a metal plug, including a base 4, which is fixed to the two ends of the vent 1 on the top of the seismic pressure gauge 14 by screws. The metal plug has good corrosion resistance and high temperature resistance and is suitable for various industrial environments. The base 4 is made of stainless steel, and the surface is polished to ensure the flatness of the contact surface with the top of the seismic pressure gauge 14 and improve the sealing effect. The diameter of the base 4 is slightly larger than the diameter of the vent 1 to ensure that the area of the vent 1 is completely covered. Screw holes are provided on both sides of the base 4, and the base 4 is firmly fixed to the top of the seismic pressure gauge 14 by screws to prevent loosening due to vibration or external force during use.

[0023] See also Figure 2 In this embodiment, the switch device is a switch screw 5. A ventilation space 6 is provided in the middle of the base 4. The inner wall of the ventilation space 6 is provided with a thread. The switch screw 5 is fixedly connected to the base 4 by a thread. The switch screw 5 is rotated to adjust the gap between the switch screw 5 and the base 4 to control the opening or closing of the ventilation path 2, thereby controlling the opening or closing of the vent hole 1 of the seismic pressure gauge 14. The switch screw 5 is made of stainless steel of the same material as the base 4, and the surface can be chrome-plated to enhance corrosion resistance. The top of the switch screw 5 can be designed to be hexagonal in shape to facilitate rotation with a wrench. The threaded portion of the screw is precisely machined to ensure a close fit with the threaded hole of the base 4 to prevent gas or liquid from leaking through the thread gap.

[0024] See also Figure 2 In this embodiment, the method of controlling the opening or closing of the ventilation path 2 by rotating the switch screw 5 to adjust the gap between the switch screw 5 and the base 4 includes two states: when the switch screw 5 is rotated to the rising limit position, a gap exists between the switch screw 5 and the base 4, forming the ventilation path 2, that is, the ventilation path 2 is in the open state at this time; when the switch screw 5 is rotated to the falling limit position, the gap between the switch screw 5 and the base 4 is closed, and the ventilation path 2 is in the closed state. At this time, the seismic pressure gauge 14 can be removed and placed at will without oil leakage, etc., which is convenient for inspection and maintenance or storage.

[0025] Furthermore, when switch screw 5 is rotated to its upper limit, a gap of approximately 0.5 to 1 mm is formed between the bottom of the screw and the interior of base 4. This gap forms part of venting path 2, allowing air to circulate freely. At this point, a pressure balance channel is established between the interior of seismic-resistant pressure gauge 14 and the external environment, ensuring measurement accuracy.

[0026] In some specific embodiments, a limiting structure may be provided on the switch screw 5. The rising limit position is controlled by the limiting structure provided on the switch screw 5 to prevent the screw from completely disengaging from the base 4. When the switch screw 5 is rotated to the falling limit position, the bottom of the switch screw 5 fits tightly against the interior of the base 4, completely sealing the gap and cutting off the air passage 2. The bottom of the screw is equipped with a sealing gasket made of oil-resistant rubber. It can deform and fill the tiny gap when the screw is tightened, thereby improving the sealing effect. The torque at the falling limit position is controlled at 3-5 N / m, which ensures the sealing effect without damaging the threads or sealing gasket due to overtightening.

[0027] See also Figure 2 In this embodiment, the dustproof device is a dust cover 7, which covers the air outlet 3 of the ventilation air path 2 to prevent external dust from entering the ventilation air path 2. Preferably, the dust cover 7 is made of high-density copper metal with good impact resistance.

[0028] For further information, see Figure 2 and Figure 3 The dust cover 7 in this embodiment is an integral annular copper metal, and its interior is an annular groove, in which a filter screen 17 is provided. Figure 3 As shown, the filter screen 17 has a hole in the middle, and the filter screen can be repeatedly rinsed. The bottom of the dust cover 7 is provided with a slot 16, and the base 4 is provided with a buckle. The slot 16 is fixedly connected to the base 4 through the buckle, forming a dust barrier. At the same time, it is easy to disassemble and clean. When the dust cover 7 needs to be cleaned, the switch screw 5 is unscrewed, the filter screen 17 of the dust cover is removed, and it is rinsed and reused. The outer diameter of the switch screw 5 is slightly larger than the inner diameter of the filter screen 17, which not only serves as a ventilation path 2 but also fixes the filter screen 17, thereby preventing it from falling off.

[0029] It should be noted here that this embodiment provides a sealing plug for a shock-resistant pressure gauge, including a sealing structure that can be detachably installed at the air vent on the top of the shock-resistant pressure gauge. The sealing structure is a metal plug, and the opening and closing of the air vent are achieved by rotating the switch screw, and the air path is covered by a dust cover, which can effectively prevent dust and other foreign matter from entering the interior of the pressure gauge. At the same time, the air vent can be closed when not in use to prevent leakage of the internal damping fluid. This design makes the shock-resistant pressure gauge more convenient for inspection and maintenance or when it needs to be disassembled for storage, effectively reduces the leakage problem caused by improper placement, extends the service life of the pressure gauge, and improves its ease of use.

[0030] Example 2 See also Figure 1 and Figure 4 This embodiment provides another sealing plug for a shockproof pressure gauge, including a sealing structure that can be detachably mounted at the air vent 1 on the top of the shockproof pressure gauge 14. The sealing structure includes a ventilation air path 2, a switch device, and a dustproof device. The ventilation air path 2 is connected to the air vent 1 on the top of the shockproof pressure gauge 14, and is used to form an air path inside the shockproof pressure gauge 14 that is connected to the ambient atmosphere when in the open state. The switch device is used to control the opening or closing of the ventilation air path 2. The dustproof device can cover the ventilation air path 2 to prevent external dust from entering the ventilation air path 2. The present invention ensures a stable internal air pressure through the switch device, thereby ensuring the accuracy of the measurement of the shockproof pressure gauge 14, greatly improving the safety of the present invention, avoiding the pressure gauge from bursting, and facilitating storage after disassembly. At the same time, the ventilation hole 1 can be closed when not in use to avoid external dust from entering and prevent leakage during movement. The dustproof device can cover the air path outlet 3 to protect the ventilation air path 2 from being affected by external dust and impurities, thereby greatly improving the usability and reliability of the present invention.

[0031] Furthermore, when open, vent path 2 connects the shock-resistant pressure gauge 14 to the ambient atmosphere, maintaining the internal and external pressures consistent. This balance is crucial for ensuring the gauge's measurement accuracy, particularly in environments with significant ambient pressure fluctuations. When closed, vent path 2 seals vent hole 1, preventing leakage of damping fluid 15 within the shock-resistant pressure gauge 14 and ensuring its shock-resistant performance and service life.

[0032] See also Figure 4 In this embodiment, the sealing structure is a rubber plug, including a rubber handle 8, which is inserted into the vent 1. Made of oil-resistant nitrile rubber, the rubber handle 8 exhibits excellent elasticity and sealing properties, and can adapt to an operating temperature range of -30°C to 120°C. The outer diameter of the rubber handle 8 is slightly larger than the inner diameter of the vent 1, and elastic deformation allows for a tight fit, ensuring a good seal. The length of the rubber handle 8 can be designed to be 15 mm, sufficient for insertion into the vent 1 and maintaining stability.

[0033] See also Figure 4 In this embodiment, a ventilation path 2 is provided within the rubber handle 8. The ventilation path 2 communicates with the vent hole 1 and with the ambient atmosphere through an air path outlet 3. The ventilation path 2 can be a hollow channel with a diameter of approximately 1 mm, running through the center of the rubber handle 8. The inner wall of the air path is smooth, reducing air flow resistance and ensuring rapid equalization of internal and external air pressures. The air path outlet 3 is located near the top of the rubber handle 8. Air path outlets 3 are provided on both sides of the rubber handle 8, increasing the contact area with the outside air and improving gas exchange efficiency.

[0034] See also Figure 4 In this embodiment, the switch device is a raised ring 9, which is arranged on the surface of the rubber handle 8 near the vent 1 of the shock-resistant pressure gauge 14 and is located below the air path outlet 3. The diameter of the raised ring 9 is larger than the opening diameter of the vent 1. The opening or closing of the ventilation air path 2 is controlled by adjusting the position of the raised ring 9. The diameter of the raised ring 9 is slightly larger than the opening diameter of the vent 1 to ensure that it can be firmly stuck on the edge of the vent 1 and prevent the rubber plug from slipping. The raised ring 9 is integrally formed with the rubber handle 8 to enhance structural strength and prevent it from falling off during use.

[0035] See also Figure 4 In this embodiment, the dustproof device is a dust cover 10. The interior of the dust cover 10 is an annular groove to form a covered space. The dust cover 10 is located on the top of the rubber handle 8. The dust cover 10 is detachably connected to the rubber handle 8 and is used to cover the vent 1 and block external dust. The dust cover 10 is made of the same nitrile rubber material and can be integrated with the rubber handle 8 to form an integral structure. The diameter of the dust cover 10 is larger than the diameter of the raised ring 9 and can completely cover the area of the vent 1. The dust cover 10 is 3 mm thick, which has sufficient rigidity to maintain its shape while also having appropriate flexibility for easy operation.

[0036] Furthermore, the method of controlling the opening or closing of the ventilation path 2 by adjusting the position of the raised ring 9 includes two states: when the rubber handle 8 is pressed to the first position, the raised ring 9 is engaged with the vent hole 1, the air path outlet 3 is in contact with the ambient atmosphere, and the ventilation path 2 inside the rubber handle 8 is in an open state; when the rubber handle 8 is pressed to the second position, the raised ring 9 is in contact with the inside of the vent hole 1, the air path outlet 3 is not in contact with the ambient atmosphere, and the ventilation path 2 inside the rubber handle 8 is in a closed state.

[0037] Preferably, the first position is located at the raised ring 9. In this position, the rubber handle 8 is inserted into the vent hole 1 to a depth of approximately 5 mm, with the raised ring 9 resting squarely on the edge of the vent hole 1. This position connects the air outlet 3 of the vent path 2 within the rubber handle 8 to the external environment, forming a complete ventilation channel. The elasticity of the rubber handle 8 ensures that the raised ring 9 remains firmly fixed to the edge of the vent hole 1, and will not shift position due to vibration or minor impact.

[0038] Preferably, the second position is between above the air outlet 3 and the top of the rubber handle 8. In the second position, the rubber handle 8 is further pressed, increasing its insertion depth into the vent 1 to approximately 10 mm, and the raised ring 9 fully enters the vent 1. At this point, the dust cover 10 is tightly against the outer opening of the vent 1, completely sealing the air outlet 3 and isolating the internal connection between the shockproof pressure gauge 14 and the external environment. The elastic properties of the rubber handle 8 enable it to form a tight fit with the inner wall of the vent 1, providing a reliable seal and preventing leakage of the damping fluid 15.

[0039] It should be noted here that the settings of the above parameters are designed based on the diameter of 100mm of the pressure gauge commonly used in factories, which can meet normal usage needs.

[0040] It is understood that the dust cover 10 can function effectively in both positions. In the first position, although the dust cover 10 does not completely fit the opening of the vent 1, its overhanging edge still blocks most dust from entering the air outlet 3. In the second position, the dust cover 10 completely covers the opening of the vent 1, forming a tight dust barrier that effectively prevents external dust and moisture from entering the interior of the shock-resistant pressure gauge 14.

[0041] Preferably, the rubber handle 8 is designed for ease of use, with anti-slip grooves on the top, allowing for easy operation even when wearing gloves or with wet hands. The rubber material is selected to take into account oil resistance, weather resistance, and appropriate hardness, ensuring that it will not age or deform during long-term use in various industrial environments and maintain good sealing performance.

[0042] See also Figure 5-Figure 8 In some specific embodiments, the sealing structure further includes a rubber sealing seat 11, such as Figure 5 As shown, a groove 12 is provided around the rubber sealing seat 11, and the rubber sealing seat 11 is provided at the vent 1 on the top of the seismic pressure gauge 14. The rubber sealing seat 11 is tightly connected to the base 4. A through hole 13 is provided in the middle of the rubber sealing seat 11, which is connected to the vent 1 and the ventilation air path 2 to form a complete air path. In daily use, Figure 6 As shown, when the rubber plug is pulled out upward, the raised ring 9 is clamped on the rubber sealing seat 11, and the ventilation path 2 is in contact with the external atmosphere. At this time, the dust cover 10 is half-buckled to prevent some dust from entering the ventilation path 2. When the seismic pressure gauge 14 is not in use or needs to be removed and moved, Figure 7 and Figure 8 As shown, when the rubber plug is pressed, the dust cover 10 on the top of the rubber plug fits tightly with the rubber sealing seat 11, and at the same time, the dust cover 10 is completely buckled down, the ventilation path 2 is not in contact with the external atmosphere, and the damping fluid 15 inside the seismic-resistant pressure gauge 14 will not leak.

[0043] It should be noted here that this embodiment provides a sealing plug for a shock-resistant pressure gauge, including a sealing structure that can be detachably installed at the air vent on the top of the shock-resistant pressure gauge. The sealing structure is a rubber plug, which controls the opening and closing of the ventilation path by pressing and adjusting the position of the raised ring, and covers the ventilation path with a dust cover, which can effectively prevent dust and other foreign matter from entering the interior of the pressure gauge. At the same time, the air vent can be closed when not in use to prevent leakage of the internal damping fluid. This design makes the shock-resistant pressure gauge more convenient for inspection and maintenance or when it needs to be disassembled for storage, effectively reduces the leakage problem caused by improper placement, extends the service life of the pressure gauge, and improves its ease of use.

[0044] It should be noted that both Example 1 and Example 2 are sealing plugs for seismic-resistant pressure gauges. The above examples are intended only to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above examples, those skilled in the art should understand that the technical solutions described in the above examples may be modified or some of the technical features thereof may be replaced by equivalents. Such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0046] The various technical features described above can be combined arbitrarily. Although not all possible combinations of these technical features are described, any combination of these technical features should be considered to be covered by this specification as long as such combination does not conflict.

[0047] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A sealing plug for a seismic-resistant pressure gauge, characterized in that: The invention comprises a sealing structure detachably mounted on the top vent hole (1) of the seismic-resistant pressure gauge (14), wherein the sealing structure comprises: A vent gas path (2) is connected to the vent hole (1) at the top of the shock-resistant pressure gauge (14) and is used to form a gas path for connecting the interior of the shock-resistant pressure gauge (14) to the ambient atmosphere when in an open state; A switch device for controlling the opening or closing of the ventilation air path (2); A dustproof device, the dustproof device can cover the air path outlet (3) of the ventilation air path (2), and the dustproof device is used to prevent external dust from entering the ventilation air path (2).

2. The sealing plug for a seismic-resistant pressure gauge according to claim 1, characterized in that: The ventilation air path (2) forms an air path connecting the interior of the shock-resistant pressure gauge to the ambient atmosphere when in the open state, and is used to keep the internal and external air pressures of the shock-resistant pressure gauge (14) consistent; The vent gas path (2) seals the vent hole (1) in a closed state, thereby preventing leakage of the damping fluid (15) inside the shockproof pressure gauge (14).

3. The sealing plug for a seismic-resistant pressure gauge according to claim 1, characterized in that: The sealing structure is a metal plug, comprising a base (4), and the base (4) is fixed to both ends of the top vent hole (1) of the seismic-resistant pressure gauge (14) by screws.

4. The sealing plug for a seismic-resistant pressure gauge according to claim 3, characterized in that: The switch device is a switch screw (5), a ventilation space (6) is provided in the middle of the base (4), the inner wall of the ventilation space (6) is provided with a thread, the switch screw (5) is fixedly connected to the base (4) by the thread, and the switch screw (5) is rotated to adjust the gap between the switch screw (5) and the base (4) to control the opening or closing of the ventilation path (2), thereby controlling the opening or closing of the vent hole (1) of the seismic-resistant pressure gauge (14).

5. The sealing plug for a seismic-resistant pressure gauge according to claim 4, characterized in that: The method for controlling the opening or closing of the ventilation air path (2) by rotating the switch screw (5) to adjust the gap between the switch screw (5) and the base (4) includes: When the switch screw (5) is rotated to the upper limit position, a gap exists between the switch screw (5) and the base (4), forming a ventilation air path (2), that is, the ventilation air path (2) is in an open state at this time; When the switch screw (5) is rotated to the lowering limit position, the switch screw (5) and the base (4) are closed, and the ventilation air path (2) is in a closed state.

6. The sealing plug for a seismic-resistant pressure gauge according to claim 4, characterized in that: The dustproof device is a dustproof cover (7), which covers the air outlet (3) of the ventilation air path (2) and is used to prevent external dust from entering the ventilation air path (2).

7. The sealing plug for a seismic-resistant pressure gauge according to claim 1, characterized in that: The sealing structure is a rubber plug, comprising a rubber handle (8), the rubber handle (8) being used to be inserted into the vent hole (1), a vent air path (2) being provided inside the rubber handle (8), the vent air path (2) being in communication with the vent hole (1), and being in communication with the ambient atmosphere through an air path outlet (3).

8. The sealing plug for a seismic-resistant pressure gauge according to claim 7, characterized in that: The switch device is a raised ring (9), which is arranged on the surface of the rubber handle (8) near the vent hole (1) of the shockproof pressure gauge (14) and is located below the air path outlet (3). The diameter of the raised ring (9) is larger than the opening diameter of the vent hole (1). The opening or closing of the air path (2) is controlled by adjusting the position of the raised ring (9).

9. The sealing plug for a seismic-resistant pressure gauge according to claim 8, characterized in that: The dustproof device is a dustproof cover (10), which is arranged on the top of the rubber handle (8) and is fixedly connected to the rubber handle (8). The dustproof cover (10) is used to cover the air outlet (3) of the ventilation air path (2) to prevent external dust from entering the ventilation air path (2).

10. The sealing plug for a seismic-resistant pressure gauge according to claim 9, characterized in that: The method for controlling the opening or closing of the ventilation path (2) by adjusting the position of the engagement of the raised ring (9) comprises: When the rubber handle (8) is pressed to the first position, the raised ring (9) is engaged with the vent hole (1), the air path outlet (3) is in contact with the ambient atmosphere, and the air path (2) inside the rubber handle (8) is in an open state; When the rubber handle (8) is pressed to the second position, the raised ring (9) contacts the inside of the vent hole (1), and the air path outlet (3) does not contact the ambient atmosphere, and the air path (2) inside the rubber handle (8) is in a closed state.

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