Gasket for stainless steel mounting

Abstract

The utility model discloses a gasket for stainless steel installation belongs to mechanical connection technical field, including flange, connecting bolt and nut still includes buffer mechanism, centring ring, anticorrosive pad, sealing compression ring, sealing washer and guide sleeve, and the centring ring sets up on flange and realizes installation centering, and the guide sleeve sets up on the connecting bolt and guides bolt alignment, and sealing compression ring and sealing washer combination realize reliable sealing, and buffer mechanism includes the locating sleeve fixed in flange, and the locating sleeve contains the axle sleeve, buffer spring and buffer pad, and the end of connecting bolt can push the axle sleeve and compress buffer spring and absorb impact. The utility model discloses the integrated centering and sealing assembly, solved the component deviation and sealing failure problem caused by the misalignment when flange connection, and through the built -in buffer mechanism, solved the problem of poor connection stability caused by impact vibration when installing.

Description

Technical Field

[0001] This utility model relates to the field of mechanical connection technology, and in particular to stainless steel installation washers. Background Technology

[0002] In mechanical equipment and pipeline engineering, flange connection is a basic and widely used method of fixing and sealing. This connection structure uses mating flange faces to fit together, a sealing gasket is placed between the flange faces, and multiple bolts are used to lock them through the bolt holes of the flange, thereby achieving the fixing of components and the sealing of internal media.

[0003] However, in actual installation operations, especially when connecting heavy or large-diameter flanges, it is difficult to accurately align the center axes of the two flanges. Misalignment will cause uneven pressure on the sealing gasket, which may lead to gasket displacement or even damage, resulting in a decrease in the sealing performance of the connection. In addition, even if the sealing surface of the flange is precision machined, there are still microscopic roughness and unevenness on the surface. After the bolt tightening force is transmitted through ordinary gaskets, the pressure distribution is not absolutely uniform. In some areas, it may not be possible to form an effective sealing pressure, thus leaving the potential for leakage.

[0004] During the tightening of bolts, especially when using impact tools for rapid installation, strong impacts and vibrations are generated. Traditional connection structures lack effective buffering and shock absorption mechanisms. This impact energy is directly transmitted to the equipment body, which not only affects the stability of the installation but may also damage connected precision instruments or components. At the same time, when the transported medium is corrosive, the medium may penetrate through weak points in the sealing interface, directly corroding the flange and fasteners and shortening the service life of the equipment.

[0005] Therefore, this utility model proposes a stainless steel installation washer to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems existing in the stainless steel installation gasket, such as difficulty in alignment during installation leading to component misalignment, single sealing structure leading to sealing failure, and low connection stability due to installation impact and vibration, this utility model aims to provide a stainless steel installation gasket with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a stainless steel installation gasket, including: a flange, a connecting bolt for passing through the flange, and a nut that is threadedly engaged with the connecting bolt; it also includes a buffer mechanism, a connecting block, a centering ring, an anti-corrosion gasket, a sealing pressure ring, a sealing washer, and a guide sleeve.

[0008] The buffer mechanism includes a positioning sleeve, a buffer pad, a gasket, a buffer spring, a buffer plate, and a bushing. The innovation of the buffer mechanism is that the positioning sleeve is fixed to the flange, and the end of the connecting bolt can be inserted into the positioning sleeve to push the bushing. The bushing, buffer plate, and buffer spring abut against each other in sequence to generate axial compression deformation under the action of the connecting bolt.

[0009] Furthermore, the connecting block fixes the flange and the centering ring, the anti-corrosion gasket is placed between the two, the sealing pressure ring and the sealing gasket are combined and placed on the sealing surface of the flange, and the guide sleeve is fitted on the connecting bolt. Through the unique integrated combination of the above components, a composite connection assembly integrating centering, sealing and shock absorption functions is formed.

[0010] Preferably, the buffer pad is fixedly installed inside the positioning sleeve and located on the movement path of the bushing.

[0011] Preferably, the gasket is fixedly connected to the end of the buffer spring away from the buffer plate, and the maximum compression of the buffer spring is limited when the edge of the gasket abuts against the inner wall of the positioning sleeve.

[0012] Preferably, the bushing has a hollow structure, and the buffer spring is partially housed inside the bushing to guide the buffer spring to extend and retract axially.

[0013] Preferably, the sealing pressure ring and the sealing gasket are stacked sequentially along the axial direction of the flange.

[0014] Preferably, the centering ring is fitted inside the central hole of the flange and has a flange extending out of the flange end face.

[0015] Preferably, the anti-corrosion gasket is an annular gasket, which is pressed between the flange and the centering ring.

[0016] Preferably, there are multiple connecting blocks, which are evenly distributed along the circumference of the flange.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model achieves automatic centering during installation by setting a centering ring, uses a guide sleeve to assist the bolts in precise positioning, and uses a combination of sealing pressure ring and sealing gasket to solve the problems of component misalignment and sealing failure caused by uneven pressure in the flange connection in the prior art, thus achieving high connection accuracy and tight and reliable sealing.

[0019] 2. This utility model solves the problem of poor connection stability caused by the impact and vibration generated during flange installation and tightening in the prior art by integrating a buffer mechanism consisting of a buffer spring, a bushing, and a buffer pad on the flange, and by pushing the buffer mechanism to generate elastic deformation when tightening the connecting bolts, thereby achieving smooth installation and improving connection stability. Attached Figure Description

[0020] Figure 1 This is a front perspective view of the stainless steel mounting washer proposed in this utility model;

[0021] Figure 2 This is a partial exploded view of the flange structure of the stainless steel installation gasket proposed in this utility model;

[0022] Figure 3 This is a partial structural exploded view of the connecting bolt for the stainless steel mounting washer proposed in this utility model;

[0023] Figure 4 This is a partial structural disassembly diagram of the positioning sleeve for the stainless steel installation washer proposed in this utility model.

[0024] Legend:

[0025] 1. Flange; 2. Buffer mechanism; 201. Positioning sleeve; 202. Buffer pad; 203. Gasket; 204. Buffer spring; 205. Buffer plate; 206. Bushing; 207. Connecting bolt; 3. Connecting block; 4. Centering ring; 5. Anti-corrosion pad; 6. Sealing pressure ring; 7. Sealing gasket; 8. Nut; 9. Guide sleeve. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] Example:

[0028] Please refer to Figures 1 to 4This utility model provides a stainless steel installation gasket, including a flange 1. The flange 1 integrates an alignment and sealing assembly, a fastening assembly, and a buffer mechanism 2, thus forming a functionally composite connection assembly. The alignment and sealing assembly includes a connecting block 3, a centering ring 4, an anti-corrosion gasket 5, a sealing pressure ring 6, and a sealing gasket 7. The centering ring 4 is fitted inside the center hole of the flange 1. The centering ring 4 has a flange extending out of the end face of the flange 1 for initial alignment during installation. Multiple connecting blocks 3 evenly distributed along the circumference of the flange 1 fix the flange 1 and the centering ring 4 together. An anti-corrosion gasket 5 is pressed between the mating surfaces of the flange 1 and the centering ring 4. On the sealing surface of the flange 1, a sealing pressure ring 6 for filling micro-gaps and a sealing gasket 7 for evenly distributing pressure are stacked sequentially along the axial direction of the flange 1.

[0029] The fastening assembly includes a connecting bolt 207, a nut 8, and a guide sleeve 9. The connecting bolt 207 passes through a bolt hole on the flange 1. The guide sleeve 9 is fitted onto the connecting bolt 207 to guide the connecting bolt 207 and the nut 8 to be precisely aligned. The nut 8 achieves final locking by engaging with the threaded connection of the connecting bolt 207. The buffer mechanism 2 is used to absorb the impact and vibration generated during installation. The buffer mechanism 2 includes a positioning sleeve 201 fixed to the flange 1 and a buffer pad 202, a gasket 203, a buffer spring 204, a buffer plate 205, and a bushing 206 housed inside the positioning sleeve 201. The end of the connecting bolt 207 can be inserted into the interior of the positioning sleeve 201 and abuts against the end face of the bushing 206. The bushing 206, the buffer plate 205, and the buffer spring 204 are arranged in sequence along the axial direction inside the positioning sleeve 201. The bushing 206 is a hollow structure, and the buffer spring 204 is partially housed inside the bushing 206, forming a stable guiding fit.

[0030] Please refer to Figure 3 and Figure 4 The buffer mechanism 2 uses the positioning sleeve 201 as the overall bearing shell. The positioning sleeve 201 is a hollow cylindrical structure. The positioning sleeve 201 is fixed to the surface of the flange 1 by welding or integral molding. In the internal cavity of the positioning sleeve 201, an annular buffer pad 202 is fixedly installed near the bottom inner wall. The buffer pad 202 is made of elastic materials such as rubber or polyurethane. It can provide auxiliary energy absorption and buffering at the end of the buffer stroke to prevent rigid impact. During the fastening process, the tail of the connecting bolt 207 will extend into the open end of the positioning sleeve 201 and push the bushing 206 housed inside the positioning sleeve 201. The bushing 206 is a stepped hollow tube. The bushing 206 slides axially under the guidance of the inner wall of the positioning sleeve 201. One end of the bushing 206 abuts against the central area of ​​the buffer plate 205. The buffer plate 205 is pressed against the end of the buffer spring 204.

[0031] A portion of the buffer spring 204 is housed within the internal cavity of the bushing 206. The inner wall of the bushing 206 guides and supports the outer diameter of the buffer spring 204, ensuring that the buffer spring 204 maintains a stable coaxial posture when compressed or released, preventing bending or eccentricity, thus ensuring a smooth and reliable buffering process. A washer 203 is fixedly connected to the other end of the buffer spring 204 away from the buffer plate 205. The outer diameter of the washer 203 is smaller than the inner diameter of the positioning sleeve 201. Under extreme compression, the end face of the washer 203 will contact the buffer pad 202, thereby limiting and protecting the maximum compression stroke of the buffer spring 204 and preventing the spring from failing due to excessive deformation.

[0032] As a preferred embodiment, in order to improve the alignment accuracy and convenience during installation, the structure of the centering ring 4 is further optimized. The centering ring 4 is fitted into the center hole of the flange 1, and the center hole of the flange 1 is machined into a stepped hole. The outer diameter of the centering ring 4 is also designed to be stepped accordingly, so that the centering ring 4 and the flange 1 form a tight interference or transition fit, thereby ensuring the coaxiality between the two. The centering ring 4 has a flange that extends out of the end face of the flange 1. During installation, the flange can be inserted into the hole of the component to be connected first, which plays a role in pre-guidance and positioning, greatly facilitating the docking operation of the flange 1.

[0033] As another preferred embodiment, in order to reliably fix the flange 1 and the centering ring 4 and isolate the corrosive medium, the connecting block 3 is designed as multiple independent blocks. The connecting blocks 3 are evenly distributed along the circumference of the flange 1 and are firmly connected to the centering ring 4 by welding or screw fastening, so that the connection force is more uniform. At the same time, the anti-corrosion gasket 5 is designed as an annular shape that matches the contact surface shape of the flange 1 and the centering ring 4. The anti-corrosion gasket 5 is made of corrosion-resistant materials such as polytetrafluoroethylene or flexible graphite. Under the fastening action of the connecting block 3, the anti-corrosion gasket 5 is pressed between the flange 1 and the centering ring 4, completely filling the interface gap between the two and forming an effective corrosion isolation barrier.

[0034] As another preferred embodiment, in order to enhance the sealing reliability of the flange 1 connection, the sealing structure adopts a combined design. The sealing pressure ring 6 and the sealing gasket 7 are stacked sequentially in the sealing surface groove of the flange 1 along the axial direction of the flange 1. The sealing pressure ring 6 is preferably made of a relatively soft metal or non-metal material, which can produce plastic deformation under pressure to fill the micro-unevenness such as knife marks and scratches on the sealing surface of the flange 1. The sealing gasket 7 is made of a metal or composite material with high strength. Its function is to convert the concentrated load from the connecting bolt 207 into an annular pressure that is evenly distributed on the entire sealing pressure ring 6, which can simultaneously meet the macro and micro sealing requirements.

[0035] As a specific implementation method, in order to ensure the dynamic stability of the buffer mechanism 2 during operation, the bushing 206 is designed as a hollow structure. The inner diameter of the bushing 206 and the outer diameter of the buffer spring 204 form a precise sliding fit, so that the buffer spring 204 can be partially accommodated in the internal cavity of the bushing 206. When the buffer spring 204 is compressed under the push of the connecting bolt 207, the inner wall of the bushing 206 can provide effective lateral support and guidance for the spiral coil of the buffer spring 204, thereby reliably guiding the buffer spring 204 to perform extension and contraction strictly along the axial direction, effectively preventing the spring from bending laterally, becoming unstable or eccentric when compressed, and ensuring the smoothness and repeatability of the energy absorption process.

[0036] In a further embodiment, in order to effectively control the buffer stroke and increase the system damping, the buffer pad 202 is fixedly installed at the bottom of the positioning sleeve 201 by bonding or interference fit. The buffer pad 202 is directly opposite to the movement direction of the bushing 206, that is, it is located on the movement path of the bushing 206. The washer 203, which is fixedly connected to the end of the buffer spring 204, has an outer diameter designed to be slightly smaller than the inner diameter of the positioning sleeve 201. When the buffer mechanism 2 is compressed to the limit position, the end face of the washer 203 will impact and press the buffer pad 202. The elastic deformation of the buffer pad 202 absorbs the impact energy of the final stage. At the same time, the washer 203 also plays the role of transmitting and dispersing the spring pressure. This achieves flexible limiting of the maximum compression amount and increases the damping effect of the system, thereby improving stability.

[0037] Working principle:

[0038] During installation, the entire stainless steel installation washer is first aligned with the interface of the component to be connected. The protruding flange of the centering ring 4 will be inserted into the hole of the other component first to achieve initial centering and guidance. As the flange 1 approaches, the outer circumference of the centering ring 4 fits tightly with the inner hole of the component to be connected, thereby accurately calibrating the center axis of the two components and effectively solving the problem of axial error caused by human misalignment. At this time, the sealing pressure ring 6 and sealing gasket 7 on the sealing surface of the flange 1 are also pre-tightened.

[0039] The operator passes the connecting bolt 207 through the flange 1 and the guide sleeve 9. Because the guide sleeve 9 provides stable guidance for the shank of the connecting bolt 207, the connecting bolt 207 can be smoothly and accurately aligned and screwed into the nut 8, avoiding the problem of washer displacement or thread damage caused by bolt misalignment during the tightening process. During the tightening of the nut 8, the axial pressure applied by the head of the connecting bolt 207 and the nut 8 will first act on the sealing washer 7. The high-strength sealing washer 7 will uniformly convert the concentrated point pressure transmitted by the connecting bolt 207 into annular surface pressure applied to the entire sealing ring 6. Under uniform pressure, the sealing ring 6 undergoes slight plastic deformation, filling all the micro gaps between the flange 1 and the sealing surface of the component to be connected, thereby forming a reliable macro and micro double seal, solving the problem of seal failure. At the same time, the anti-corrosion gasket 5 is firmly pressed between the flange 1 and the centering ring 4, effectively blocking the penetration of the internal medium and protecting the internal components.

[0040] In the final stage of tightening the connecting bolt 207, especially when using tools such as impact wrenches for quick installation, the tail of the connecting bolt 207 will push the bushing 206 inside the buffer mechanism 2 to move. The bushing 206 then drives the buffer plate 205 and compresses the buffer spring 204. Most of the impact energy generated during the installation process is absorbed by the elastic deformation of the buffer spring 204. The stable guidance of the bushing 206 inside the positioning sleeve 201 ensures the smooth coaxiality of the entire buffering process. The buffer pad 202 absorbs the residual impact at the end of the stroke. Through the synergistic effect of the buffer mechanism 2, the vibration generated during installation is reduced, the stability of the connection is increased, and the components are protected from impact damage.

Claims

1. Stainless steel mounting washers, including: Flange (1), connecting bolts (207) for passing through the flange (1), and nuts (8) that are threadedly engaged with the connecting bolts (207); Its features are, The stainless steel mounting gasket also includes a buffer mechanism (2), a connecting block (3), a centering ring (4), an anti-corrosion pad (5), a sealing pressure ring (6), a sealing gasket (7), and a guide sleeve (9); The connecting block (3) is fixedly connected to the flange (1) and the centering ring (4), the anti-corrosion gasket (5) is disposed between the two, and the sealing pressure ring (6) and the sealing gasket (7) are combined and disposed on the sealing surface of the flange (1); The buffer mechanism (2) includes a positioning sleeve (201), a buffer pad (202), a gasket (203), a buffer spring (204), a buffer plate (205), and a bushing (206). The positioning sleeve (201) is fixed to the flange (1). The end of the connecting bolt (207) can be inserted into the positioning sleeve (201) to push the bushing (206). The bushing (206), the buffer plate (205), and the buffer spring (204) abut against each other in sequence to generate axial compression deformation under the action of the connecting bolt (207).

2. The stainless steel mounting washer according to claim 1, characterized in that, The buffer pad (202) is fixedly installed inside the positioning sleeve (201) and located on the movement path of the bushing (206).

3. The stainless steel mounting washer according to claim 1, characterized in that, The gasket (203) is fixedly connected to the end of the buffer spring (204) away from the buffer plate (205). When the edge of the gasket (203) abuts against the inner wall of the positioning sleeve (201), it limits the maximum compression of the buffer spring (204).

4. The stainless steel mounting washer according to claim 1, characterized in that, The bushing (206) has a hollow structure, and the buffer spring (204) is partially housed inside the bushing (206) to guide the buffer spring (204) to extend and retract axially.

5. The stainless steel mounting washer according to claim 1, characterized in that, The sealing ring (6) and the sealing gasket (7) are stacked sequentially along the axial direction of the flange (1).

6. The stainless steel mounting washer according to claim 1, characterized in that, The centering ring (4) is fitted into the center hole of the flange (1) and has a flange extending out of the end face of the flange (1).

7. The stainless steel mounting washer according to claim 1, characterized in that, The anti-corrosion pad (5) is annular and is pressed between the flange (1) and the centering ring (4).

8. The stainless steel mounting washer according to claim 1, characterized in that, There are multiple connecting blocks (3), which are evenly distributed along the circumference of the flange (1).

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