Grouting pipeline flange plate sealing gasket device

Abstract

The utility model provides a grouting pipeline flange plate sealing gasket device which comprises a first flange plate and a second flange plate. A first sealing gasket is arranged on the inner side of the first flange plate; the projection part of the first sealing gasket in the direction of the first flange plate covers the first flange plate; one end of the second flange plate is connected with a second grouting pipeline; a second sealing gasket is arranged on the inner side of the second flange plate; the projection part of the second sealing gasket in the direction of the second flange plate covers the second flange plate; and the other end of the second flange plate is connected with the other end of the first flange plate through a bolt, so that the first grouting pipeline is communicated with the second grouting pipeline, and the problem that a flange plate sealing gasket of an existing grouting pipeline is difficult to replace is solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of flanges, in particular to a grouting pipeline flange sealing gasket device. BACKGROUND

[0002] In mine fire prevention and extinguishing operation, injecting yellow mud slurry into the goaf and along the goaf side is a crucial fire prevention measure. With the continuous mining of the working face, the surrounding rock and support structure of the roadway will deform, which directly threatens the stability of the grouting pipeline. As the key channel for conveying yellow mud slurry, the sealing performance of the grouting pipeline is directly related to the fire prevention and extinguishing effect. However, in the actual operation process, the sealing gasket of the grouting pipeline is often damaged due to the deformation and extrusion of the roadway, which in turn causes the problem of slurry leakage. Slurry leakage not only reduces the grouting efficiency, but also affects the fire prevention and extinguishing effect, and even poses a potential threat to mine safety. Therefore, ensuring the integrity and stability of the sealing gasket of the grouting pipeline has become an important problem that needs to be solved in mine fire prevention and extinguishing work.

[0003] In view of the problem of damaged sealing gasket of the grouting pipeline, the current method is to regularly inspect the grouting pipeline, replace the sealing gasket once it is found to be damaged, or add protective structures outside the grouting pipeline to reduce the influence of roadway deformation on the pipeline, or use high-strength and wear-resistant sealing materials to improve the durability of the sealing gasket.

[0004] The above-mentioned solutions alleviate the problem of damaged sealing gasket to some extent, but all have limitations. For example, regular inspection and replacement of the sealing gasket require a lot of time and manpower, and it is difficult to respond in real time; adding protective structures increases system complexity and cost; and using high-strength sealing materials can improve durability, but cannot fundamentally solve the problem of damaged sealing gasket caused by roadway deformation. CONTENT OF THE INVENTION

[0005] The application provides a grouting pipeline flange sealing gasket device to solve the technical problem that it is currently difficult to replace the flange sealing gasket of the grouting pipeline.

[0006] The application provides a grouting pipeline flange sealing gasket device, which comprises:

[0007] A first flange, one end of the first flange is connected with a first grouting pipeline; a first sealing gasket is arranged on the inner side of the first flange; the projection part of the first sealing gasket in the direction of the first flange covers the first flange;

[0008] A second flange plate, one end of the second flange plate is connected with a second grouting pipe; a second gasket is arranged on the inner side of the second flange plate; the projection of the second gasket in the direction of the second flange plate covers the second flange plate; the other end of the second flange plate is connected with the other end of the first flange plate through a bolt, so that the first grouting pipe and the second grouting pipe are connected in communication.

[0009] In some embodiments, the inner side of the first flange plate and the second flange plate is provided with a groove, and the first gasket and the second gasket are arranged in the groove.

[0010] In some embodiments, the side of the first gasket and the second gasket away from the first flange plate and the second flange plate is coplanar with the inner side of the first flange plate and the second flange plate.

[0011] In some embodiments, the first flange plate and the second flange plate are circular; the first flange plate and the second flange plate are provided with a plurality of first connecting holes; the first flange plate and the second flange plate are connected by the bolt penetrating through the first connecting hole.

[0012] In some embodiments, the first flange plate and the second flange plate are semicircular; the two sides of the first flange plate and the second flange plate are provided with second connecting holes, and the first flange plate and the second flange plate are connected by the bolt penetrating through the second connecting hole.

[0013] In some embodiments, the inner side of the first flange plate and the second flange plate is further provided with a pressure-resistant gasket; the projection of the pressure-resistant gasket in the direction of the first flange plate or the second flange plate covers the first flange plate or the second flange plate.

[0014] In some embodiments, the pressure-resistant gasket is arranged in the groove and on the side of the first gasket or the second gasket away from the first flange plate or the second flange plate.

[0015] In some embodiments, the side of the pressure-resistant gasket away from the first flange plate or the second flange plate is coplanar with the inner side of the first flange plate or the second flange plate.

[0016] In some embodiments, the thickness of the pressure-resistant gasket is less than the thickness of the first gasket and the second gasket.

[0017] In some embodiments, the surface roughness of the groove is less than or equal to 0.8 μm.

[0018] The application provides a grouting pipeline flange sealing gasket device, which comprises a first flange, one end of the first flange being connected with a first grouting pipeline; a first sealing gasket being arranged on the inner side of the first flange; a projection part of the first sealing gasket in the direction of the first flange covering the first flange; a second flange, one end of the second flange being connected with a second grouting pipeline; a second sealing gasket being arranged on the inner side of the second flange; a projection part of the second sealing gasket in the direction of the second flange covering the second flange; the other end of the second flange being connected with the other end of the first flange through a bolt, so that the first grouting pipeline and the second grouting pipeline are connected in communication, so as to solve the problem that it is difficult to replace the flange sealing gasket of the grouting pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 FIG. 1 is a structural schematic diagram of the grouting pipeline flange sealing gasket device in the present application;

[0021] Figure 2 FIG. 2 is a structural schematic diagram of the flange in one embodiment in the present application;

[0022] Figure 3 FIG. 3 is a structural schematic diagram of the flange in another embodiment in the present application.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1-first flange; 11-first sealing gasket; 12-first connecting hole; 13-second connecting hole; 2-first grouting pipeline; 3-second flange; 31-second sealing gasket; 4-second grouting pipeline; 5-bolt; DETAILED DESCRIPTION

[0025] In order to make the personnel in the technical field better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0026] According to the mine fire extinguishing requirements, yellow mud slurry needs to be injected into the goaf and along the empty side. Affected by the mining of the working face, the grouting pipeline is easily extruded by the deformation of the roadway side, which causes the sealing gasket to be damaged and causes the slurry leakage. When processing, the grouting pipeline needs to be cut open and the sealing gasket needs to be replaced. The sealing gasket is arranged at the connection between the two grouting pipelines. When replacing, due to the extrusion of the grouting pipeline by the roadway side, the screw holes on the flange plate of the grouting pipeline are easily mixed up, and the construction lifting point is needed, which causes the construction of the grouting pipeline to be difficult.

[0027] Due to the difficulty of replacing the flange plate sealing gasket of the grouting pipeline in some technologies, in order to solve the technical problem, the application provides a grouting pipeline flange plate sealing gasket device. The structures of the parts of the grouting pipeline flange plate sealing gasket device will be described below.

[0028] As shown in Figure 1 , it is a structure schematic diagram of the grouting pipeline flange plate sealing gasket device in the application at an angle.

[0029] The application provides a grouting pipeline flange plate sealing gasket device, which comprises:

[0030] A first flange plate 1, one end of the first flange plate 1 is connected with a first grouting pipeline 2; the inner side of the first flange plate 1 is provided with a first sealing gasket 11; the projection part of the first sealing gasket 11 in the direction of the first flange plate 1 covers the first flange plate 1; a second flange plate 3, one end of the second flange plate 3 is connected with a second grouting pipeline 4; the inner side of the second flange plate 3 is provided with a second sealing gasket 31; the projection part of the second sealing gasket 31 in the direction of the second flange plate 3 covers the second flange plate 3; the other end of the second flange plate 3 is connected with the other end of the first flange plate 1 through a bolt 5, so that the first grouting pipeline 2 and the second grouting pipeline 4 are connected in communication. The sealing gasket can adopt a 4mm nitrile rubber (NBR) sealing ring (Shore hardness 70±5).

[0031] For example, the flange plate is a crucial connecting component in the grouting operation, bearing the core function of connecting the grouting pipeline and ensuring its sealing. Specifically, the two ends of the flange plate are designed with specific connecting interfaces, which can be tightly combined with the grouting pipeline through welding or threaded connection. The welding method provides extremely high connection strength and sealing, suitable for scenarios with high requirements for connection stability; while the threaded connection is characterized by easy disassembly and reuse, suitable for frequent maintenance or adjustment of the grouting system. During the butt joint of the two flange plates, a sealing gasket is arranged between the two flange plates to seal the connection between the two flange plates and prevent the mud in the grouting pipeline from overflowing. The sealing gasket is arranged on the inner side of the grouting pipeline. After the connection between the grouting pipeline and the flange plate is completed, the two flange plates are fastened by bolts. Finally, when the two flange plates are tightly connected by the bolts and the sealing gasket is effectively compressed, the grouting pipeline forms a complete and closed conveying system, and the mud can flow smoothly along the grouting pipeline to complete the grouting work.

[0032] The present application provides a grouting pipeline flange plate sealing gasket device, which arranges the sealing gasket on the inner side of the flange plate. In view of the fact that the roadway side wall is prone to deformation under complex geological conditions, thereby exerting a pressing action on the grouting pipeline, causing damage to the sealing gasket and causing mud leakage. Currently, the sealing gasket is usually placed at the connection of the flange plate, which is extremely susceptible to factors such as deformation of the roadway side wall, external impact, or uneven stress of the grouting pipeline itself, leading to damage to the sealing gasket and thus reducing or even losing the sealing performance of the sealing gasket. By embedding the sealing gasket on the inner side of the flange plate, the present application forms a relatively closed and protected space, effectively isolating the direct action of external adverse factors on the sealing gasket, greatly reducing the risk of damage to the sealing gasket. Specifically, when the roadway side wall deforms, the pressing action is mainly exerted on the outer wall of the grouting pipeline, and since the sealing gasket is arranged on the inner side of the flange plate, even if the outer wall of the grouting pipeline is deformed by pressing, the sealing gasket on the inner side remains intact and continues to play its sealing role. The grouting pipeline flange plate sealing gasket device provided by the present application has a simple structure, is easy to manufacture, and is convenient to install, disassemble and damage, thereby reducing the workload and labor intensity of the workers and improving the work efficiency.

[0033] In this embodiment, the inner side of the first flange plate 1 and the second flange plate 3 is provided with a groove, and the first sealing gasket 11 and the second sealing gasket 31 are arranged in the groove. The groove is a cylindrical groove with a diameter of φ155x1.5mm (tolerance ±0.05mm); the sealing gasket is installed in the groove, and an initial seal is achieved through 25% axial compression rate (1.0mm compression amount), which adapts to the installation deviation of the pipeline.

[0034] Exemplarily, in order to further prevent the sealing gasket from being damaged, in view of the problem that the sealing gasket in the grouting pipeline is prone to being damaged by mud flushing, the inner side wall surface of the first flange plate 1 and the second flange plate 3 is provided with a groove structure. When the sealing gasket is installed, the sealing gasket is embedded in the groove, and the edge of the groove forms a physical limiting action on the sealing gasket, effectively preventing the displacement or falling off of the sealing gasket during the mud flow. It can be understood that when the mud flows in the grouting pipeline, due to factors such as flow rate, pressure and carried solid particles, the mud will have certain kinetic energy and potential energy, which will continuously flush the sealing gasket. If the sealing gasket is simply attached to the inner wall of the grouting pipeline, even if stronger fixing measures are taken, it is difficult to completely resist such long-term and high-intensity flushing, and eventually the sealing gasket will be worn, deformed or even fail. By arranging the sealing gasket in the groove, not only the physical barrier effect of the groove is utilized to reduce the direct flushing of the sealing gasket by the mud, but also the close cooperation between the groove and the sealing gasket enhances the pressure resistance of the sealing gasket, further prolonging the service life of the sealing gasket.

[0035] In this embodiment, the first sealing gasket 11 and the second sealing gasket 31 are coplanar with the inner side surface of the first flange plate 1 and the second flange plate 3 away from one side surface of the first flange plate 1 and the second flange plate 3. The groove depth matches the compression amount of the sealing gasket, and under the working condition of grouting pressure 10-20 MPa, the groove side wall can effectively constrain the radial deformation of the sealing ring to prevent extrusion failure.

[0036] Exemplarily, in order to further prevent the sealing gasket from being damaged, the first sealing gasket 11 and the second sealing gasket 31 are arranged to be coplanar with the inner side surface of the first flange plate 1 and the second flange plate 3 away from one side surface of the first flange plate 1 and the second flange plate 3. When the mud flows in the grouting pipeline, it will compress the sealing gasket, so that the plane of the sealing gasket on the outside of the pipeline and the inner side surface of the grouting pipeline are in a coplanar state, thereby further preventing the sealing gasket from being flushed, enhancing the pressure resistance of the sealing gasket, and further prolonging the service life of the sealing gasket.

[0037] As shown in Figure 2 , it is a structure schematic diagram of the flange plate in an embodiment of the present application.

[0038] In this embodiment, the first flange plate 1 and the second flange plate 3 are circular; the first flange plate 1 and the second flange plate 3 are provided with a plurality of first connecting holes 12; the first flange plate 1 and the second flange plate 3 are connected by the bolts 5 penetrating through the first connecting holes 12.

[0039] Exemplary, one of the flange plate in the application is a circular, both ends of the flange plate are welded or threaded connection grouting pipeline, the inner side of the flange plate is provided with a sealing gasket, wherein the leakage of the sealing gasket is on the other end of the flange plate, when the grouting pipeline is welded or threaded connected with the flange plate, the two flange plates are fastened by bolts, the sealing gasket of the two flange plates is pressed to realize the sealing between the two flange plates, so as to complete the grouting work by using the grouting pipeline. By setting the sealing gasket in the groove on the inner side of the flange plate, the sealing gasket is prevented from being washed, the pressure resistance of the sealing gasket is enhanced, and the service life is further prolonged.

[0040] As shown in Figure 3 , it is a structural schematic diagram of the flange plate in another embodiment of the application.

[0041] In this embodiment, the first flange plate 1 and the second flange plate 3 are semicircular; the two sides of the first flange plate 1 and the second flange plate 3 are provided with second connecting holes 13, the first flange plate 1 and the second flange plate 3 are connected by the bolts 5 penetrating through the second connecting holes 13.

[0042] Exemplary, another setting mode of the flange plate in the application is semicircular, both ends of the flange plate are welded or threaded connection grouting pipeline, the inner side of the flange plate is provided with a sealing gasket, wherein the leakage of the sealing gasket is on the other end of the flange plate, when the grouting pipeline is welded or threaded connected with the flange plate, the two flange plates are fastened by bolts, the sealing gasket of the two flange plates is pressed to realize the sealing between the two flange plates, so as to complete the grouting work by using the grouting pipeline. By setting the sealing gasket in the groove on the inner side of the flange plate, the sealing gasket is prevented from being washed, the pressure resistance of the sealing gasket is enhanced, and the service life is further prolonged.

[0043] Wherein, when the flange plate is circular, the flange plate with semicircular structure is more easily replaced with the sealing gasket arranged on the inner side of the flange plate.

[0044] In this embodiment, the inner side of the first flange plate 1 and the second flange plate 3 is further provided with a pressure-resistant pad; the projection part of the pressure-resistant pad in the direction of the first flange plate 1 or the second flange plate 3 covers the first flange plate 1 or the second flange plate 3. When the system pressure is greater than or equal to 5MPa, the pressure-resistant pad (thickness 2mm, temperature resistance 600℃) is installed, the double sealing is realized by using the bolt pre-tightening force, the inert gas leakage is prevented, and the pressure-resistant pad comprises a high-pressure resistant asbestos pad.

[0045] For example, when the slurry flows in the grouting pipeline, it will generate a continuous and large pressure on the inner wall of the pipeline and its connecting parts. In order to further prevent the damage of the sealing gasket, the pressure-resistant gasket is arranged inside the flange. The sealing gasket is hidden between the pressure-resistant gasket and the grouting pipeline. The pressure-resistant gasket has high temperature resistance and high pressure resistance. In the grouting operation, the temperature of the slurry may be increased due to the friction in the pumping process, the change of the external environment temperature or the high temperature characteristics of the slurry itself. The pressure-resistant gasket can maintain stable physical and chemical properties in a high temperature environment, and will not soften, deform or fail due to temperature rise, thereby ensuring the safety of the sealing gasket under high temperature conditions. At the same time, in the face of the huge pressure generated by the slurry flow, the pressure-resistant gasket has a certain pressure resistance. It can effectively disperse and absorb the direct impact of the slurry on the sealing gasket, avoiding the damage or deformation of the sealing gasket due to excessive local stress. In addition, the pressure-resistant gasket also has excellent elastic recovery ability, and can quickly recover to the original state even after a long time under high pressure, thereby maintaining the continuous protection of the sealing gasket.

[0046] In this embodiment, the pressure-resistant gasket is arranged in the groove, away from one side of the first sealing gasket 11 or the second sealing gasket 31 away from the first flange 1 or the second flange 3.

[0047] For example, in order to further prevent the damage of the pressure-resistant gasket, in view of the problem that the pressure-resistant gasket in the grouting pipeline is easily damaged by the slurry, when the pressure-resistant gasket is installed, the pressure-resistant gasket is embedded in the groove, and the edge of the groove forms a physical limiting action on the sealing gasket, effectively preventing the displacement or falling of the sealing gasket during the slurry flow.

[0048] In this embodiment, the side of the pressure-resistant gasket away from the first flange 1 or the second flange 3 is coplanar with the inner side of the first flange 1 or the second flange 3.

[0049] For example, in order to further prevent the damage of the pressure-resistant gasket, the side of the pressure-resistant gasket away from the first flange 1 and the second flange 3 is arranged to be coplanar with the inner side of the first flange 1 and the second flange 3. When the slurry flows in the grouting pipeline, it will compress the pressure-resistant gasket, so that the plane of the pressure-resistant gasket outside the pipeline is coplanar with the inner side of the grouting pipeline, thereby further preventing the pressure-resistant gasket from being washed, enhancing the pressure resistance of the pressure-resistant gasket, and further prolonging the service life of the pressure-resistant gasket.

[0050] In this embodiment, the thickness of the pressure-resistant pad is less than the thickness of the first sealing pad 11 and the second sealing pad 31. The pressure-resistant pad in this application is used to protect the first sealing pad 11 and the second sealing pad 31, so the thickness of the pressure-resistant pad does not need to be set too large, which can reduce the production cost on the one hand, and can reduce the contact area with the mud on the other hand, thereby improving the service life of the pressure-resistant pad. The bolt pre-tightening force can be used to realize the double sealing of the pressure-resistant pad and the sealing pad, and prevent the inert gas in the grouting pipeline from leaking.

[0051] In this embodiment, the surface roughness of the groove is less than or equal to 0.8 μm, which ensures that the sealing ring is uniformly stressed. In the grouting operation, the mud flows at high speed in the pipeline, and the pressure fluctuation and impact force generated thereby will produce dynamic extrusion and shearing effect on the sealing ring. If the surface roughness of the groove is too large, not only will it increase the frictional resistance between the sealing ring and the groove, leading to the aggravation of the wear of the sealing ring, but also will form stress concentration points on the contact surface, so that the sealing ring is unevenly stressed, and further causes safety hazards such as leakage. Therefore, the surface of the groove is finely polished and polished in this application, so that the surface roughness reaches 0.8 μm or a more optimal level, thereby reducing the frictional resistance between the surface of the groove and the sealing ring, and ensuring that the sealing ring can be uniformly stressed in the groove, forming a stable and reliable sealing interface.

[0052] The above detailed description is further detailed for the purpose, technical solutions and beneficial effects of the embodiments of the application, and it should be understood that the above is only a specific embodiment of the application, and is not used to limit the protection scope of the embodiments of the application, and any modification, equivalent replacement, improvement, etc. made on the basis of the technical solutions of the embodiments of the application should be included in the protection scope of the embodiments of the application.

Claims

1. A grouting pipe flange sealing gasket device, characterized in that, The utility model relates to a first flange (1) one end is connected with first grouting pipeline (2), first flange (1) inside is provided with first gasket (11), the projection part of first gasket (11) to first flange (1) direction covers first flange (1), second flange (3) one end is connected with second grouting pipeline (4), second flange (3) inside is provided with second gasket (31), the projection part of second gasket (31) to second flange (3) direction covers second flange (3), the other end of second flange (3) is connected with the other end of first flange (1) through bolt (5), makes first grouting pipeline (2) and second grouting pipeline (4) intercommunication. The inner side of the first flange (1) and the second flange (3) is provided with a groove, and the first gasket (11) and the second gasket (31) are arranged in the groove. The side of the first gasket (11) and the second gasket (31) away from the first flange (1) and the second flange (3) is coplanar with the inner side of the first flange (1) and the second flange (3).

2. A grouting pipe flange gasket device according to claim 1, characterized in that, The first flange (1) and the second flange (3) are circular; the first flange (1) and the second flange (3) are provided with a plurality of first connecting holes (12); the bolt (5) penetrates the first connecting hole (12), so that the first flange (1) and the second flange (3) are connected.

3. A grouting pipe flange gasket device according to claim 2, characterized in that, The first flange (1) and the second flange (3) are semicircular; the first flange (1) and the second flange (3) are provided with second connecting holes (13) on both sides, and the bolt (5) penetrates the second connecting hole (13), so that the first flange (1) and the second flange (3) are connected.

4. A grouting pipe flange gasket device according to claim 2, characterized in that, The inner side of the first flange (1) and the second flange (3) is further provided with a pressure-resistant pad; the projection part of the pressure-resistant pad to the first flange (1) or the second flange (3) direction covers the first flange (1) or the second flange (3).

5. A grouting pipe flange gasket device according to claim 2, characterized in that, The pressure-resistant pad is arranged in the groove and away from one side of the first gasket (11) or the second gasket (31) of the first flange (1) or the second flange (3).

6. A grouting pipe flange gasket device according to claim 4 or 5, characterized in that, The side of the pressure-resistant pad away from the first flange (1) or the second flange (3) is coplanar with the inner side of the first flange (1) or the second flange (3).

7. A grouting pipe flange gasket device according to claim 6, characterized in that, The thickness of the pressure-resistant pad is less than the thickness of the first gasket (11) and the second gasket (31).

8. A grouting pipe flange gasket device according to claim 6, characterized in that, The surface roughness of the groove is less than or equal to 0.8 μm.

9. A grouting pipe flange gasket device according to claim 6, characterized in that, ​ 10. The grouting pipe flange gasket device of claim 2, wherein, ​

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