Sealing screw assembly

Abstract

According to the technical scheme, the sealing screw assembly is characterized in that the sealing screw assembly comprises a screw and a sealing assembly, the screw comprises a knife pattern prefabricated head, the knife pattern prefabricated head is fixedly connected with a connecting column, the connecting column is fixedly connected with an extrusion ring used for extruding the sealing assembly, and the extrusion ring is fixedly connected with a threaded column fixedly connected with the connecting column; the sealing assembly comprises a first sealing ring, the first sealing ring is internally provided with a containing cavity used for containing sealant and arranged below the extrusion ring and a first channel communicating with the containing cavity and extending to the outer side of the first sealing ring, and the first channel is provided with a first opening formed vertically upwards. By means of the elasticity of the first sealing ring and the extrusion characteristic of the extrusion ring, a user can use the sealing device conveniently, the first opening for guiding sealant to flow out is vertically arranged upwards, and therefore the sealant can make contact with a screw firstly and then make contact with a plate under the action of gravity.

Description

Technical Field

[0001] The utility model relates to a screw, and more specifically, to a sealed screw assembly. Background Art

[0002] A sealed screw is a screw with a sealing function, usually a fastener composed of a screw body and components such as a sealing ring or a sealing gasket, and is commonly used for the connection and sealing of mechanical equipment and the fixed sealing of building materials. The use of sealing ring materials can effectively prevent the penetration of moisture or dust particles, enhance the sealing performance, keep the equipment clean, and ensure the sealing of the internal environment of the equipment. However, it is found in actual use that in order to achieve a better sealing effect, the sealing ring screw is made of high-strength materials and can withstand large tensile and torque forces. When installing, the screw will squeeze the sealing ring as much as possible so that the sealing element fits on the plate and the screw. However, when used on a plate with a curvature, it is easy for the sealing ring to not fit the plate. Forcibly rotating the screw to squeeze the sealing ring may damage the arc surface. Therefore, a sealed screw assembly is needed, which can form a sealing effect by fitting the arc surface without damaging the arc surface.

[0003] Combined with the above reasons, how to form a sealing effect by fitting the arc surface without damaging the arc surface is exactly the problem considered in this application. Summary of the Utility Model

[0004] In view of the deficiencies of the prior art, a sealed screw assembly is provided, which can form a sealing effect by fitting the arc surface without damaging the arc surface.

[0005] To achieve the above object, the following technical solutions are provided: A sealed screw assembly includes a screw and a sealing assembly. The screw includes a prefabricated head with knife marks. The prefabricated head with knife marks is fixedly connected to a connecting column. The connecting column is fixedly connected to a pressing ring for pressing the sealing assembly. The pressing ring is fixedly connected to a threaded column fixedly connected to the connecting column. The sealing assembly includes a first sealing ring. An accommodating cavity for placing sealant and located below the pressing ring is arranged inside the first sealing ring, and a first channel communicating with the accommodating cavity and extending to the outside of the first sealing ring is provided. A first opening arranged vertically upward is provided in the first channel.

[0006] In summary, the above technical solutions have the following beneficial effects: Sealant is commonly used to assist in sealing. However, in the prior art, sealant is usually applied near the sealing ring after the screw is installed. Although this can fill the gap between the sealing ring and the curved plate, due to the curvature of the plate, there is an internal gap between the sealing ring and the screw, and the sealant cannot fill the gap between the sealing ring and the screw. Therefore, the actual optimal solution is to let the sealant flow out from between the sealing ring and the screw and overflow to between the sealing ring and the curved plate. In the utility model, the function of the sealing ring is realized through the first sealing ring;

[0007] In this utility model, a first sealing ring is provided to store the sealant. Since the first sealing ring itself has elasticity, the accommodating cavity for the sealant is arranged below the extrusion ring. In this way, when the screw moves downward, the extrusion ring will force the first sealing ring to deform, so that the internal volume of the accommodating cavity decreases, and the sealant will flow out from the first opening along the first channel.

[0008] Because the first opening is arranged vertically upward, the sealant will directly contact the connecting column, thereby filling the gap between the sealing ring and the screw. And the extrusion ring continues to squeeze the first sealing ring, the sealant continues to overflow and flows along the side to the bottom of the first sealing ring, and finally converges in the gap between the sealing ring and the arc-shaped plate. When the sealant solidifies, the gap between the sealing ring and the screw and the gap between the sealing ring and the arc-shaped plate can be sealed, so as to achieve the purpose of forming a sealing effect by fitting the arc surface without damaging the arc surface.

[0009] There are various types of sealants. Sealants mainly based on polyurethane and epoxy resin materials can be selected. When in contact with air, the chemical substances inside will react with moisture (mainly water vapor) or oxygen in the air, resulting in the growth and cross-linking of molecular chains, forming a solid elastomer.

[0010] This utility model is convenient for users to use through the elasticity of the first sealing ring and the extrusion characteristics of the extrusion ring, and the first opening for guiding the outflow of the sealant is arranged vertically upward. In this way, the sealant will first contact the screw, and then contact the plate under the action of gravity. In this way, the sealant flows out from between the sealing ring and the screw and overflows to between the sealing ring and the arc-shaped plate, so as to achieve the purpose of forming a sealing effect by fitting the arc surface without damaging the arc surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the sealed screw assembly;

[0012] Figure 2 It is a sectional view of this utility model.

[0013] Reference numerals: 1, screw; 2, sealing assembly;

[0014] 11, knife pattern prefabricated head; 12, connecting column; 13, extrusion ring; 14, threaded column; 15, accommodating groove; 16, second channel;

[0015] 21, first sealing ring; 22, accommodating cavity; 23, first channel; 24, first opening; 25, second sealing ring; 26, accommodating hole; 27, inlet; 28, second opening; 29, protective film. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. The same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component, respectively.

[0017] Referring to Figure 1-2 As shown, the seal screw assembly includes a screw 1 and a seal assembly 2. The screw 1 includes a knurled preformed head 11. The knurled preformed head 11 is fixedly connected to a connecting column 12. The connecting column 12 is fixedly connected to an extrusion ring 13 for extruding the seal assembly 2. The extrusion ring 13 is fixedly connected to a threaded column 14 fixedly connected to the connecting column 12. The seal assembly 2 includes a first seal ring 21. An accommodation cavity 22 for placing sealant and located below the extrusion ring 13 is provided inside the first seal ring 21, and a first channel 23 communicating with the accommodation cavity 22 and extending to the outside of the first seal ring 21 is provided. A first opening 24 vertically upward is provided in the first channel 23;

[0018] Sealant is often used for auxiliary sealing. However, in the prior art, sealant is usually applied near the sealing ring after the screw 1 is installed. Although this can fill the gap between the sealing ring and the arc-shaped plate, due to the curvature of the plate, there is an internal gap between the sealing ring and the screw 1, and the sealant cannot fill the gap between the sealing ring and the screw 1. Therefore, the actual optimal solution is to let the sealant flow out between the sealing ring and the screw 1 and overflow to the gap between the sealing ring and the arc-shaped plate. In the present utility model, the function of the sealing ring is realized through the first seal ring 21;

[0019] In the present utility model, the first seal ring 21 is provided to store the sealant. Since the first seal ring 21 itself has elasticity, the accommodation cavity 22 for accommodating the sealant is provided below the extrusion ring 13. Thus, when the screw 1 moves downward, the extrusion ring 13 will force the first seal ring 21 to deform, so that the internal volume of the accommodation cavity 22 decreases, and the sealant will flow out from the first opening 24 along the first channel 23;

[0020] Because the first opening 24 is vertically upward, the sealant will directly contact the connecting column 12, thereby filling the gap between the sealing ring and the screw 1. The extrusion ring 13 continues to extrude the first seal ring 21, and the sealant continues to overflow and flows along the side to the bottom of the first seal ring 21, and finally gathers in the gap between the sealing ring and the arc-shaped plate. After the sealant solidifies, the gap between the sealing ring and the screw 1 and the gap between the sealing ring and the arc-shaped plate can be sealed, so as to achieve the purpose of forming a sealing effect by fitting the arc surface without damaging the arc surface;

[0021] There are many types of sealants. Sealants based on polyurethane and epoxy resin materials can be selected. When in contact with air, the chemical substances inside will react with the moisture (mainly water vapor) or oxygen in the air, resulting in the growth and cross-linking of molecular chains to form a firm elastomer;

[0022] The utility model is convenient for users through the elasticity of the first sealing ring 21 and the extrusion characteristics of the extrusion ring 13, and the first opening 24 for guiding the sealant to flow out is arranged vertically upward. In this way, the sealant will first contact the screw 1, and then contact the plate under the action of gravity. Thus, the sealant flows out between the sealing ring and the screw 1 and overflows to between the sealing ring and the arc-shaped plate, so as to achieve the purpose of forming a sealing effect by fitting the arc surface without damaging the arc surface.

[0023] Furthermore, the side surface of the extrusion ring 13 is inclined such that the outer diameter gradually decreases in the direction towards the first sealing ring 21;

[0024] Since the first sealing ring 21 extrudes the sealant through deformation, the side surface for extrusion is arranged in an inclined shape. On the one hand, this can prevent the extrusion ring 13 from detaching from the first sealing ring 21 during the downward movement of the extrusion ring 13. On the other hand, it can also increase the extrusion area and facilitate the extrusion of the sealant.

[0025] Furthermore, a second sealing ring 25 is fixedly connected to the first sealing ring 21 on the side towards the connecting column 12. A receiving hole 26 for placing the sealant is provided inside the second sealing ring 25. The receiving hole 26 is provided with an inlet 27 communicating with the first opening 24 and a second opening 28 arranged vertically upward;

[0026] A receiving groove 15 for receiving the second sealing ring 25 is provided on the connecting column 12. The side surface of the receiving groove 15 is inclined such that the inner diameter gradually increases in the direction towards the second sealing ring 25;

[0027] The second sealing ring 25 can be used to hold more sealant on the one hand, and can be used to further enhance the sealing performance through the cooperation of the receiving groove 15 and the second sealing ring 25 on the other hand. When the second sealing ring 25 is received in the receiving groove 15, the sealant can normally overflow from the second opening 28. Since the overall volume of the gap formed in the receiving groove 15 becomes smaller, the amount of sealant used can be reduced, thus achieving the purpose of saving materials. And the side surface of the receiving groove 15 is inclined such that the inner diameter gradually increases in the direction towards the second sealing ring 25, so that the shape of the gap formed in the receiving groove 15 is relatively complex, and the solidified sealant can play a similar clamping effect to further enhance the connection stability and sealing performance between the second sealing ring 25 and the connecting column 12.

[0028] Furthermore, the side surface of the receiving hole 26 is inclined such that the inner diameter gradually increases in the direction towards the connecting column 12;

[0029] This can also make the shape of the gap formed in the accommodation hole 26 relatively complex. After the sealant solidifies, it can play a similar clamping effect to prevent the solidified sealant from detaching from the second sealing ring 25.

[0030] Furthermore, the accommodation hole 26 is fixedly connected with a protective film 29 provided at the second opening 28;

[0031] The protective film 29 is made of a material with a certain toughness to ensure that the sealant does not contact air during transportation. After the extrusion ring 13 starts to extrude, the hydraulic pressure of the sealant increases, so that the protective film 29 can be damaged and the sealant can overflow from the second opening 28.

[0032] Furthermore, the outer diameter of the second sealing ring 25 is smaller than the outer diameter of the first sealing ring 21. A second channel 16 is provided at the top of the accommodation groove 15. The second channel 16 communicates with the top of the accommodation groove 15 and extends to a position between the outer diameter of the second sealing ring 25 and the outer diameter of the first sealing ring 21;

[0033] In this way, on the one hand, the sealant only overflows outward after the accommodation groove 15 is filled with the sealant, which can first ensure the connection strength and sealing performance between the second sealing ring 25 and the connecting column 12. If the sealant is insufficient, it only needs to lay a sealant connecting plate and the first sealing ring 21 from the outside, which is convenient for remedy. On the other hand, the first sealing ring 21, the second sealing ring 25 and the connecting column 12 can form a groove concave towards the second sealing ring 25. Under the guidance of the second channel 16, the sealant will overflow along the groove, which can ensure that the gap between the first sealing ring 21 and the plate is completely filled with the sealant, and the shape of the solidified sealant wrapping the first sealing ring 21 can play a similar clamping effect to prevent the solidified sealant from detaching from the first sealing ring 21.

[0034] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. Sealing screw assembly, characterized in that, It includes a screw and a sealing assembly. The screw includes a prefabricated head with tool marks. The prefabricated head with tool marks is fixedly connected to a connecting column. The connecting column is fixedly connected to a pressing ring for pressing the sealing assembly. The pressing ring is fixedly connected to a threaded column fixedly connected to the connecting column. The sealing assembly includes a first sealing ring. An accommodating cavity for placing sealant and located below the pressing ring and a first channel communicating with the accommodating cavity and extending to the outside of the first sealing ring are provided in the first sealing ring. A first opening vertically upward is provided in the first channel.

2. The sealed screw assembly according to claim 1, wherein The side surface of the pressing ring is inclined such that the outer diameter gradually decreases in the direction towards the first sealing ring.

3. The sealed screw assembly according to claim 1, characterized in that, A second sealing ring is fixedly connected to the side of the first sealing ring facing the connecting column. An accommodating hole for placing sealant is provided in the second sealing ring. The accommodating hole is provided with an inlet communicating with the first opening and a second opening vertically upward.

4. The sealed screw assembly according to claim 3, characterized in that, An accommodating groove for accommodating the second sealing ring is provided on the connecting column. The side surface of the accommodating groove is inclined such that the inner diameter gradually increases in the direction towards the second sealing ring.

5. The sealed screw assembly according to claim 3, characterized in that, The side surface of the accommodating hole is inclined such that the inner diameter gradually increases in the direction towards the connecting column.

6. The sealed screw assembly according to claim 3, characterized in that, A protective film is fixedly connected to the accommodating hole at the second opening.

7. The sealed screw assembly according to claim 4, wherein The outer diameter of the second sealing ring is smaller than the outer diameter of the first sealing ring. A second channel is provided at the top of the accommodating groove. The second channel communicates with the top of the accommodating groove and extends to the position between the outer diameter of the second sealing ring and the outer diameter of the first sealing ring.

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