Hexagon sight with external thread

Abstract

The utility model relates to the field of sight glass structure design, concretely relates to a hexagonal sight glass of external thread, include: sight glass body, first gasket, side wall gasket, sight glass, second gasket and sealing nut, the inside of sight glass body is equipped with observation hole, there is installation chamber in the observation hole, the first gasket is placed in the bottom of installation chamber, the side wall gasket is equipped with in installation chamber side, the sight glass is located above the first gasket and is attached with the inside wall of side wall gasket, the second gasket is above the sight glass, and the sealing nut is above the second gasket, the utility model is sealed in layers and cooperates hexagonal structure of external thread, and the even power transmission is prevented leakage and is pressed, and the installation maintenance is convenient and efficient.

Description

Technical Field

[0001] This utility model relates to the field of sight mirror structure design, specifically to an external wire hexagonal sight mirror. Background Technology

[0002] Sight glasses, as key components in industrial pipelines and reaction equipment systems used to observe the internal state of media, flow conditions, or equipment operation, are widely used in chemical, petroleum, pharmaceutical, and food processing industries. Their structural design must balance sealing performance, pressure resistance, clear observation, and ease of installation and maintenance. Especially under harsh operating conditions such as high pressure, high dust, and strong corrosion, even higher requirements are placed on sealing performance and structural stability.

[0003] Existing sight glasses typically employ a single-plane sealing structure, directly tightening the sight glass with bolts or glands. While this design is simple, in practical applications, traditional single-layer gaskets are unable to withstand media leakage under high-pressure environments. Uneven pressure distribution at the sealing interface can easily lead to gaps and leakage risks. Furthermore, the lack of an effective mechanism for dispersing lateral stress makes the sight glass edges prone to cracking due to localized compression, affecting observation safety and equipment lifespan. Most existing sight glasses use circular or non-standardized interface designs, requiring specialized tools for positioning during installation, which is cumbersome and prone to thread slippage or uneven preload. Maintenance requires complete disassembly of surrounding components, and the process of replacing seals or the sight glass is complex, resulting in extended downtime and failing to meet the demands of efficient maintenance in industrial production. Utility Model Content

[0004] In view of this, this utility model addresses the shortcomings of the existing technology by proposing an externally threaded hexagonal sight glass, aiming to solve the problems of insufficient sealing reliability, inconvenient installation and maintenance, and poor structural stability of sight glass products.

[0005] This utility model provides an external wire hexagonal viewing lens, comprising:

[0006] The device comprises a sight glass body, a first sealing gasket, a side wall gasket, a sight glass, a second sealing gasket, and a sealing nut. The sight glass body has an observation hole inside, and the observation hole has an installation chamber inside. The first sealing gasket is located at the bottom of the installation chamber, the side wall gasket is located on the side of the installation chamber, the sight glass is located above the first sealing gasket, and the sight glass is in contact with the inner side wall of the side wall gasket. The second sealing gasket is located above the sight glass, and the sealing nut is located above the second sealing gasket.

[0007] Furthermore, the sight glass body also includes: an external thread section and a hexagonal connecting end, the external thread section and the hexagonal connecting end being an integral structure, and the mounting chamber being located inside the hexagonal connecting end.

[0008] Furthermore, the inner side of the hexagonal connecting end is provided with an internal thread section, and the side of the hexagonal connecting end is also provided with a first positioning hole, which is used to position the sealing nut and the sight glass body.

[0009] Furthermore, the mounting chamber is located between the lower part of the internal thread section and the upper part of the external thread section.

[0010] Furthermore, the upper and lower surfaces of the sight glass are both smooth mirror surfaces, and the side surfaces of the sight glass are frosted surfaces.

[0011] Furthermore, the sidewall gasket is a hollow cylindrical structure.

[0012] Furthermore, the first positioning hole corresponds to the second positioning hole opened on the outside of the sealing nut, and the sealing nut is provided with an installation thread on the outside, which engages and fixes with the internal thread segment.

[0013] Furthermore, both the first positioning hole and the second positioning hole are through holes.

[0014] Furthermore, the first positioning hole and the second positioning hole have the same diameter, and positioning pins are provided in the first positioning hole and the second positioning hole. The positioning pins are used to lock the sight glass body and the sealing nut.

[0015] Furthermore, the inner side of the sealing nut is provided with a gasket pressing layer and an internal hexagonal hole. The bottom surface of the gasket pressing layer is used to press the second sealing gasket. The gasket pressing layer is connected to the internal hexagonal hole and is located below the internal hexagonal hole.

[0016] Compared with the prior art, the advantages of this utility model are as follows: An installation chamber is set inside the observation hole of the sight glass, and a first sealing gasket, a side wall gasket, a second sealing gasket, and a sealing nut are respectively arranged at the bottom, sides, and top of the installation chamber, forming a three-dimensional sealing structure with bottom support, side positioning, and top compression. This structure can evenly transmit pressure and disperse lateral stress, preventing cracks from forming at the edge of the sight glass due to uneven stress. Simultaneously, the double-layer sealing gasket, combined with the sealing nut, significantly improves the leak-proof capability under high pressure and dust conditions. The symmetrical layout of the cylindrical installation chamber and the sight glass ensures a uniform circumferential distribution of sealing pressure, and the standardized component installation method facilitates rapid maintenance and replacement in the future. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of the external wire hexagonal sight glass provided in an embodiment of this utility model.

[0018] Figure 2 A cross-sectional view of the external wire hexagonal sight glass provided for an embodiment of this utility model.

[0019] Figure 3A schematic diagram of the sealing nut structure provided in an embodiment of this utility model.

[0020] Figure 4 This is a schematic diagram of the sidewall gasket provided in an embodiment of the present utility model.

[0021] Figure 5 A schematic diagram of a viewing mirror provided for an embodiment of this utility model.

[0022] Figure 6 A schematic diagram of the first or second sealing gasket provided for an embodiment of this utility model.

[0023] Figure 7 This is a schematic diagram of the sight glass structure provided in an embodiment of the present invention.

[0024] Wherein: 100, sight glass body; 101, external thread section; 102, hexagonal connection end; 103, mounting chamber; 104, first positioning hole; 105, internal thread section; 106, observation hole; 200, sealing nut; 201, internal hexagonal hole; 202, mounting thread; 203, gasket clamping layer; 204, second positioning hole; 400, first sealing gasket; 300, second sealing gasket; 500, side wall gasket; 600, sight glass; 700, positioning pin. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] like Figure 1-7 As shown, this preferred embodiment provides an external wire hexagonal sight glass, comprising:

[0030] The sight glass body 100, the first sealing gasket 400, the side wall gasket 500, the sight glass 600, the second sealing gasket 300, and the sealing nut 200 are provided. The sight glass body 100 is provided with an observation hole 106 inside, and the observation hole 106 is provided with an installation chamber 103 inside. The first sealing gasket 400 is provided at the bottom of the installation chamber 103, the side wall gasket 500 is provided on the side of the installation chamber 103, the sight glass 600 is provided above the first sealing gasket 400, and the sight glass 600 is in contact with the inner side wall of the side wall gasket 500. The second sealing gasket 300 is provided above the sight glass 600, and the sealing nut 200 is provided above the second sealing gasket 300.

[0031] It should be noted that the observation hole 106 penetrates the center of the sight glass body 100 and forms a radius difference with the cylindrical mounting chamber 103, allowing the bottom and side of the mounting chamber 103 to accurately position the first sealing gasket 400 and the side wall gasket 500, respectively, providing a stable mounting reference surface for the sight glass 600. The fit design between the side wall gasket 500 and the outer side wall of the sight glass 600 effectively disperses lateral pressure and avoids stress concentration at the edge of the sight glass 600 due to uneven force. The upper and lower first sealing gaskets 400 and second sealing gaskets 300 are coordinated with the sealing screws. The mother 200 forms a three-dimensional sealing structure from bottom to top, which can adapt to complex working conditions such as high pressure and high dust, and prevent the medium from leaking from the contact interface between the sight glass 600 and the sight glass body 100. The symmetrical structure of the cylindrical cavity ensures uniform transmission of sealing pressure. The sight glass 600 is stably clamped between the double sealing gaskets, which not only ensures a clear field of view, but also improves the impact resistance of the sight glass 600 through the buffering effect of the elastic gasket. At the same time, the standardized component installation method facilitates later maintenance and replacement, improving the reliability and service life of the equipment.

[0032] In some embodiments of this application, the sight glass body 100 further includes: an external threaded section 101 and a hexagonal connecting end 102, wherein the external threaded section 101 and the hexagonal connecting end 102 are an integral structure, and the mounting chamber 103 is located inside the hexagonal connecting end 102.

[0033] It should be noted that the external thread section 101 can achieve standardized threaded connections with external components such as pipes and equipment. The pre-tightening force of the thread engagement ensures reliable docking between the sight glass body 100 and the external system, making it suitable for installation scenarios of different specifications and improving assembly flexibility. The hexagonal connection end 102 provides a stable force application plane for tools such as wrenches, avoiding the slippage problem of traditional circular structures during tightening, improving installation efficiency and ease of operation. The structural design of the sight glass body 100 can enhance the overall mechanical strength and withstand axial loads under high-pressure conditions. The layout of the installation chamber 103 integrated inside the hexagonal connection end 102 ensures that the installation positioning of the first sealing gasket 400, the second sealing gasket 300, and the side wall gasket 500 does not interfere with the connection operation of the external thread section 101, improving the connection sealing performance and structural stability of the equipment under complex working conditions.

[0034] In some embodiments of this application, the inner side of the hexagonal connecting end 102 is provided with an internal thread section 105, and the side of the hexagonal connecting end 102 is also provided with a first positioning hole 104, which is used to position the sealing nut 200 and the sight glass body 100.

[0035] It should be noted that the internal thread section 105 forms a threaded fit with the sealing nut 200. The design of its radius being consistent with that of the mounting chamber 103 ensures that the installation space of the sight glass 600 and the sealing gasket is not interfered with by the threaded structure, and also enables precise pre-tightening of the sealing nut 200 through standardized threaded connection, avoiding the installation errors of traditional interference fit. The threadless mounting chamber 103 has a smooth cylindrical inner wall, which fits tightly with the mating surfaces of the side wall gasket 500 and the sight glass 600, reducing fluid resistance and impurity retention. The adjustable design of the positioning hole enhances the structural adaptability, allowing it to match sealing nuts 200 and positioning elements of different specifications. While improving assembly accuracy, it also provides convenience for quick positioning and disassembly during later maintenance, improving the long-term operational reliability of the equipment under harsh working conditions.

[0036] In some embodiments of this application, the mounting chamber 103 is located between the inner thread section 105 and the outer thread section 101.

[0037] It should be noted that the layout design of the installation chamber 103, located between the internal thread section 105 and the external thread section 101, allows the external thread section 101 to be directly connected to external components such as pipes and equipment. The internal thread section 105 forms a top thread engagement with the sealing nut 200. The installation chamber 103, as an intermediate load-bearing area, evenly transmits the axial load of the external connection to the cylindrical cavity of the installation chamber 103 through the external thread section 101, and then through the side wall gasket 500 and the sight glass 600 to the internal thread section 105 and the sealing nut 200, thus avoiding structural deformation caused by local stress concentration.

[0038] In some embodiments of this application, the upper and lower surfaces of the viewing mirror 600 are smooth mirror surfaces, and the side surfaces of the viewing mirror 600 are frosted surfaces.

[0039] It should be noted that the smooth upper and lower surfaces of the sight glass 600 form a precise contact surface with the first sealing gasket 400 and the second sealing gasket 300. The low roughness characteristics of the planar seal reduce the contact gap and ensure that the sealing gasket deforms uniformly under the pre-tightening force, effectively blocking the leakage of the medium from the axial interface of the sight glass 600 and improving the sealing reliability under high pressure. The frosted side surface increases the surface friction coefficient and forms a stable mechanical engagement with the side wall gasket 500 of the inner wall of the mounting chamber 103, preventing the sight glass 600 from shifting under radial pressure or vibration load. At the same time, the micro-concave and convex structure formed by the frosting process can enhance the tightness of the side wall gasket 500, disperse the lateral contact stress, and prevent cracks from forming on the edge of the sight glass 600 due to local compression.

[0040] In some embodiments of this application, the sidewall gasket 500 is a hollow cylindrical structure.

[0041] It should be noted that the sidewall gasket 500 adopts an internally hollow cylindrical structure, which allows its inner sidewall to fit tightly against the frosted side of the sight mirror 600, and its outer sidewall to precisely match the cylindrical inner wall of the mounting chamber 103, forming an annular clamping space. This space can not only absorb radial loads evenly through elastic deformation, avoiding edge stress concentration of the sight mirror 600 due to lateral pressure, but also reduce the direct rigid transmission of vibration or impact to the sight mirror 600 by utilizing the buffering effect of the hollow cavity, thus improving fatigue resistance.

[0042] In some embodiments of this application, the first positioning hole 104 corresponds to the second positioning hole 204 opened on the outside of the sealing nut 200, and the sealing nut 200 is provided with an installation thread 202 on the outside, which engages and fixes with the internal thread section 105.

[0043] It should be noted that the design of the mounting thread 202 and the second positioning hole 204 on the outer side of the sealing nut 200 achieves a deep optimization of connection strength and sealing reliability through a double fastening mechanism: the mounting thread 202 precisely engages with the internal thread section 105 of the hexagonal connection end 102 of the sight glass body 100, and the helical characteristics of the thread pair generate a pre-tightening force to evenly press the second sealing gasket 300 and the sight glass 600 into the mounting chamber 103, forming a quantifiable sealing pressure and avoiding sealing failure caused by uneven manual tightening force; the second positioning hole 204 cooperates with the first positioning hole 104 on the side of the sight glass body 100 to rigidly lock the sealing nut 200 and the sight glass body 100, effectively resisting the nut's rotation or axial displacement under harsh working conditions such as high pressure impact and high frequency vibration, ensuring that the double sealing gasket is always within the design compression range, and preventing the medium from leaking from the radial interface between the sight glass 600 and the sight glass body 100.

[0044] In some embodiments of this application, both the first positioning hole 104 and the second positioning hole 204 are through holes.

[0045] It should be noted that the through-hole structure further enhances the reliability and ease of operation of positioning and fastening: the through-hole design allows the positioning pin 700 or bolt to pass through bidirectionally from the side of the sight glass body 100 and the outside of the sealing nut 200, forming a fully transparent mechanical connection path. This avoids the failure of fit due to depth error when positioning with blind holes, and improves the alignment accuracy and installation efficiency during assembly.

[0046] In some embodiments of this application, the first positioning hole 104 and the second positioning hole 204 have the same diameter, and a positioning pin 700 is provided in the first positioning hole 104 and the second positioning hole 204. The positioning pin 700 is used to lock the sight glass body 100 and the sealing nut 200.

[0047] It should be noted that the design of the first positioning hole 104 and the second positioning hole 204 having the same hole diameter and being equipped with a positioning pin 700 ensures that the positioning pin 700 can directly pass through the two holes to form a rigid connection, eliminating the positioning deviation caused by the difference in hole diameter. The insertion connection method of the positioning pin 700 works synergistically with the thread preload, and restricts the rotation tendency of the sealing nut 200 in the radial direction through the pin hole.

[0048] In some embodiments of this application, a gasket pressing layer 203 and an internal hexagonal hole 201 are provided on the inner side of the sealing nut 200. The bottom surface of the gasket pressing layer 203 is used to press the second sealing gasket 300. The gasket pressing layer 203 is connected to the internal hexagonal hole 201 and is located below the internal hexagonal hole 201.

[0049] It should be noted that the bottom surface of the gasket compression layer 203 precisely fits the second sealing gasket 300. Its flatness and roughness have been precisely machined to evenly transmit the axial pressure when the nut is tightened to the sealing gasket, avoiding uneven gasket deformation caused by insufficient contact area or pressure concentration. This ensures that a complete annular sealing band is formed between the sight glass 600 and the sight glass body 100, improving the sealing reliability in high-pressure and highly corrosive media environments. The internal hexagonal hole 201 is located above the gasket compression layer 203, providing a standardized tooling interface for tools such as internal hexagonal wrenches. Compared with the traditional external hexagonal structure, the concave design reduces the external space occupied and is suitable for narrow installation scenarios. At the same time, the hexagonal cross-section of the internal hexagonal hole has a high degree of fit with tools, can withstand greater torque without slipping, and improves tightening accuracy and operating efficiency.

[0050] The working process of this utility model is as follows: the worker installs the first sealing gasket 400, the side wall gasket 500, the sight glass 600, the second sealing gasket 300 and the sealing nut 200 into the sight glass body 100 in sequence. When the sealing gasket is rotated to a certain position, the first positioning hole 104 matches the second positioning hole 204. The positioning pin 700 is inserted for positioning. Then the utility model is installed in the required position and tightened. The interior can be observed through the observation hole 106.

[0051] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An outside hexagonal sight glass characterized in that, The utility model relates to a sight glass, first gasket, sidewall gasket, sight glass, second gasket and sealing nut, the sight glass body inside is provided with observation hole, the observation hole inside is provided with mounting chamber, the first gasket sets up in the mounting chamber bottom, the sidewall gasket sets up on the mounting chamber side, the sight glass sets up above the first gasket, the sight glass and sidewall gasket inboard wall are in line, the second gasket sets up above the sight glass, the sealing nut sets up above the second gasket. The sight glass body further comprises an external thread segment and a hexagonal connecting end, the external thread segment and the hexagonal connecting end are an integral structure, and the mounting chamber is located inside the hexagonal connecting end.

2. A hexagonal sight according to claim 1, wherein An internal thread segment is arranged on the inner side of the hexagonal connecting end, and a first positioning hole is further arranged on the side surface of the hexagonal connecting end, the first positioning hole is used for positioning the sealing nut and the sight glass body.

3. A hexagonal sight according to claim 2, wherein, The mounting chamber is located between the lower side of the internal thread segment and the upper side of the external thread segment.

4. A hexagonal sight according to claim 3, wherein, The upper surface and the lower surface of the sight glass are smooth mirror surfaces, and the side surface of the sight glass is a frosted surface.

5. A hexagonal sight according to claim 1 wherein, The sidewall gasket is a hollow cylindrical structure.

6. A hexagonal sight according to claim 1 wherein, The first positioning hole corresponds to a second positioning hole arranged on the outer side of the sealing nut, the outer side of the sealing nut is provided with a mounting thread, and the mounting thread is engaged and fixed with the internal thread segment.

7. A hexagonal sight according to claim 3 wherein, The first positioning hole and the second positioning hole are both through holes.

8. A hexagonal sight according to claim 7, wherein, The first positioning hole and the second positioning hole have the same hole diameter, a positioning pin is arranged in the first positioning hole and the second positioning hole, and the positioning pin is used for locking the sight glass body and the sealing nut.

9. A hexagonal sight according to claim 8, wherein, The inner side of the sealing nut is provided with a gasket pressing layer and an internal hexagonal hole, the bottom surface of the gasket pressing layer is used for pressing the second gasket, the gasket pressing layer is connected with the internal hexagonal hole, and the gasket pressing layer is located below the internal hexagonal hole.

10. A hexagonal sight according to claim 9, wherein, ​

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