A bolt anti-loosening indicating washer

Abstract

The utility model provides a kind of bolt anti-loose indicating washer, including annular shell, annular groove is set up on the annular shell inner wall, sealing washer is installed in the annular groove, the upper portion of annular shell is equipped with temperature sensing discoloration washer.The utility model has the beneficial effect as follows, by the design of sealing washer and temperature sensing discoloration washer, to be sealed and connected by sealing washer when bolt connection, temperature sensing detection is carried out by temperature sensing discoloration washer, when the pre-tightening force of bolt drops, washer will appear loose, flange sealing of washer position will appear loose, sealing gap will be produced, high-temperature medium in flange will appear permeation, and then bolt connection place temperature will be rapidly increased, when temperature exceeds the " discoloration temperature threshold value " of thermosensitive material, finally, temperature sensing discoloration washer triggers, color turns from green to red, maintenance personnel obtains feedback quickly by the transparent plate on pressing piece, can be maintained in time.

Description

Technical Field

[0001] This utility model is a bolt anti-loosening indicator washer, belonging to the field of washer technology. Background Technology

[0002] A washer is a part placed between a connected component and a nut. It is generally a metal ring structure used to protect the surface of the connected component from scratches by the nut and to distribute the pressure of the nut on the connected component.

[0003] Currently, the washers used for tightening flange connection bolts have limited functionality and lack anti-loosening indication. This means that when bolts loosen and preload decreases, maintenance personnel cannot detect it in time, making it difficult to carry out effective inspection and maintenance, which is detrimental to the normal use of the washers. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a bolt anti-loosening indicator washer.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A bolt anti-loosening indicator washer includes an annular housing, an annular groove is formed on the inner wall of the annular housing, a sealing washer is installed inside the annular groove, and a temperature-sensitive color-changing washer is installed on the top of the annular housing.

[0007] Furthermore, the sealing gasket includes a gasket body located inside the annular housing. The outer wall of the gasket body is provided with a snap-fit ​​ring, which snaps into the annular groove. A bottom gasket is fixed to the bottom of the gasket body, and the bottom gasket is located below the annular housing and is attached to the annular housing.

[0008] Furthermore, a top gasket is fixed to the top of the gasket body, the top gasket is pressed against the top of the annular shell, and the outer surface of the top gasket has several mating notches.

[0009] Furthermore, the washer body, the snap ring, the bottom washer, and the top washer are an integral structure.

[0010] Furthermore, the thermochromic gasket includes a thermochromic pad, the bottom edge of which is provided with a plurality of mating feet, the mating feet being engaged and snapped into the mating notch, and the top of the thermochromic pad is provided with a pressure plate.

[0011] Furthermore, the pressing plate has several transparent plates that cooperate with the temperature-sensitive color-changing pad.

[0012] Furthermore, the pressure plate, the top gasket, the bottom gasket, and the washer body are all provided with through holes that are compatible with the bolts.

[0013] The beneficial effects of this utility model are:

[0014] By designing a sealing gasket and a thermochromic gasket, the sealing gasket provides a tight seal during bolted connections, while the thermochromic gasket detects temperature changes. When the bolt preload decreases, the gasket loosens, causing the flange seal at the gasket location to loosen, creating a gap. This allows high-temperature media inside the flange to seep in, leading to a rapid increase in temperature at the bolted connection. When the temperature exceeds the color-changing temperature threshold of the thermosensitive material, the thermochromic gasket is triggered, changing its color from green to red. Maintenance personnel receive this feedback quickly through the transparent plate on the pressure plate, enabling timely maintenance.

[0015] Through the design of the sealing gasket, the connection between the high-temperature flange and the gasket of this utility model is achieved by bolts. The bolts are pressed on the pressure plate, and the pressure plate squeezes the temperature-sensitive color-changing gasket and the annular shell, thereby squeezing the gasket body so that the bottom gasket and the flange connection are tightly squeezed together to achieve a sealing connection.

[0016] By designing a thermochromic gasket, when the bolt preload decreases, the flange seal becomes abnormal, creating a sealing gap. This allows high-temperature media inside the flange to seep in, causing a rapid rise in temperature at the bolt connection. When the temperature exceeds the color-changing temperature threshold of the thermosensitive material, the gasket is triggered, and the color changes from green to red. Because of the thermochromic material on the gasket, when the temperature is below the color-changing threshold, the molecular structure is stable, and the material reflects green light, appearing green. When the temperature is above the color-changing threshold, the molecular structure restructures, reflecting red light or absorbing green light, appearing red. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a bolt anti-loosening indicator washer according to the present invention;

[0019] Figure 2 This is a schematic diagram of the connection structure between the annular shell and the sealing washer of a bolt anti-loosening indicator washer according to the present invention;

[0020] Figure 3 This is a partial structural diagram of the annular shell and sealing washer of a bolt anti-loosening indicator washer according to the present invention;

[0021] Figure 4 This is a schematic diagram of the thermosensitive color-changing gasket and the connecting structure of the butt support leg of the bolt anti-loosening indicator washer of this utility model.

[0022] Figure 5 This is a schematic diagram of the annular shell structure of a bolt anti-loosening indicator washer according to the present invention;

[0023] Figure 6 This is a schematic diagram of the sealing washer structure of a bolt anti-loosening indicator washer according to the present invention;

[0024] Figure 7 This is a partial structural diagram of a sealing washer for a bolt anti-loosening indicator washer according to the present invention.

[0025] In the diagram, 1. Annular shell; 2. Annular groove; 3. Washer body; 4. Snap ring; 5. Bottom gasket; 6. Top gasket; 7. Butt joint notch; 8. Temperature-sensitive color-changing gasket; 9. Butt joint support; 10. Pressure plate; 11. Transparent plate. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-7 This utility model provides a technical solution for a bolt anti-loosening indicator washer, including an annular shell 1. An annular groove 2 is formed on the inner wall of the annular shell 1, and a sealing washer is installed inside the annular groove 2. A temperature-sensitive color-changing washer is installed on the top of the annular shell 1. Through the design of the sealing washer and the temperature-sensitive color-changing washer, the sealing washer is used to seal the connection during bolt connection, and the temperature-sensitive color-changing washer is used to detect temperature. When the preload of the bolt decreases, the washer will loosen, the flange seal at the washer position will loosen, a sealing gap will be created, and the high-temperature medium in the flange will seep in, which will cause the temperature at the bolt connection to rise rapidly. When the temperature exceeds the color-changing temperature threshold of the heat-sensitive material, the temperature-sensitive color-changing washer 8 is finally triggered, and the color changes from green to red. Maintenance personnel can quickly receive feedback through the transparent plate 11 on the pressure plate 10 and can perform maintenance in a timely manner.

[0028] See Figures 1-3 , Figures 6-7The sealing gasket includes a gasket body 3 located inside the annular housing 1. A snap-fit ​​ring 4 is provided on the outer wall of the gasket body 3, snapping into the annular groove 2. A bottom gasket 5 is fixed to the bottom of the gasket body 3, located below the annular housing 1 and fitting snugly against it. A top gasket 6 is fixed to the top of the gasket body 3, pressing against the top of the annular housing 1. Several mating notches 7 are provided on the outer surface of the top gasket 6. The gasket body 3, snap-fit ​​ring 4, bottom gasket 5, and top gasket 6 form an integral structure. In use, the high-temperature flange is connected to the gasket of this invention via bolts. The bolts press against the pressure plate 10, which compresses the temperature-sensitive color-changing gasket 8 and the annular housing 1, thereby compressing the gasket body 3 and tightly pressing the bottom gasket 5 against the flange connection, achieving a sealing connection.

[0029] See Figure 1 , Figure 2 , Figure 4 The thermochromic gasket includes a thermochromic pad 8, on which a color-changing thermosensitive material is provided. Several mating legs 9 are provided at the bottom edge of the thermochromic pad 8, and these legs are engaged with the mating notch 7. A pressure plate 10 is installed on the top of the thermochromic pad 8, and several transparent plates 11 that mate with the thermochromic pad 8 are provided on the pressure plate 10. When the bolt preload decreases, the flange seal will become abnormal, and a sealing gap will form inside the flange. High-temperature media can cause penetration, leading to a rapid increase in temperature at the bolt connection. When the temperature exceeds the color-changing temperature threshold of the thermosensitive material, the thermochromic pad 8 is triggered, and the color changes from green to red. Due to the thermochromic material on the thermochromic pad 8, when the temperature is below the color-changing threshold, the molecular structure is stable, and the material reflects green light, appearing green. When the temperature is above the color-changing threshold, the molecular structure is reconstructed, reflecting red light or absorbing green light, appearing red.

[0030] See Figure 1 The pressure plate 10, the top gasket 6, the bottom gasket 5, and the washer body 3 are all provided with through holes adapted to the bolts; the through holes facilitate the bolts to be inserted to connect the flange.

[0031] In use, the high-temperature flange is connected by bolts and the gasket of this utility model. The bolts are pressed on the pressure plate 10, and the pressure plate 10 squeezes the temperature-sensitive color-changing gasket 8 and the annular shell 1, thereby squeezing the gasket body 3 so that the bottom gasket 5 is tightly squeezed together with the flange connection, thus achieving a sealing connection.

[0032] When the bolt preload decreases, the flange seal will become abnormal, a sealing gap will be created, and the high-temperature medium inside the flange will seep in, which will cause the temperature at the bolt connection to rise rapidly. When the temperature exceeds the color change temperature threshold of the heat-sensitive material, the temperature-sensitive color-changing gasket 8 will eventually be triggered, and the color will change from green to red.

[0033] Because of the thermochromic pad 8, when the temperature is below the color-changing threshold of the thermochromic pad 8, the molecular structure is stable, the material reflects green light, and appears green; when the temperature is above the color-changing threshold of the thermochromic pad 8, the molecular structure is reconstructed, reflecting red light or absorbing green light, and appears red.

[0034] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bolt anti-loosening indicator washer, characterized in that, It includes an annular housing (1), an annular groove (2) is provided on the inner wall of the annular housing (1), a sealing gasket is installed inside the annular groove (2), and a temperature-sensitive color-changing gasket is installed on the top of the annular housing (1).

2. A bolt anti-loosening indicator washer according to claim 1, characterized in that, The sealing gasket includes a gasket body (3), which is located inside the annular housing (1). The outer wall of the gasket body (3) is provided with a snap ring (4), which snaps into the annular groove (2). A bottom gasket (5) is fixed at the bottom of the gasket body (3), which is located below the annular housing (1) and is in contact with the annular housing (1).

3. A bolt anti-loosening indicator washer according to claim 2, characterized in that, The top of the washer body (3) is fixed with a top washer (6), which presses against the top of the annular shell (1). The outer surface of the top washer (6) has several mating notches (7).

4. A bolt anti-loosening indicator washer according to claim 3, characterized in that, The washer body (3), the snap ring (4), the bottom washer (5), and the top washer (6) are an integral structure.

5. A bolt anti-loosening indicator washer according to claim 4, characterized in that, The thermochromic gasket includes a thermochromic pad (8), and the bottom edge of the thermochromic pad (8) is provided with several mating feet (9). The mating feet (9) are mated and snapped into the mating notch (7). The top of the thermochromic pad (8) is provided with a pressure plate (10).

6. A bolt anti-loosening indicator washer according to claim 5, characterized in that, The press (10) has several transparent plates (11) that cooperate with the thermochromic pad (8).

7. A bolt anti-loosening indicator washer according to claim 6, characterized in that, The pressure plate (10), the top gasket (6), the bottom gasket (5), and the washer body (3) are all provided with through holes that are compatible with the bolts.

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