Boiler pipe connection device with shock absorbing function

Abstract

This utility model relates to the field of boiler pipeline technology and discloses a boiler pipeline connection device with shock absorption function, including flanges. There are two flanges, and rubber parts are embedded in the opposite surfaces of the two flanges (102). A central connecting plate is fixed between the two rubber parts. Connecting side plates are provided on both sides of the central connecting plate. When the flanges generate amplitude due to external factors, the rubber parts between the flanges and the connecting parts can initially buffer and offset the amplitude due to their flexible material properties. At the same time, the symmetrical design of the two rubber parts can form a two-way synergistic buffering effect, effectively dispersing the vibration stress transmitted by the flanges and avoiding the situation where a single rubber part deforms beyond its limit due to excessive local stress. This is different from the problem of rubber part tearing that easily occurs in existing flexible connections, and significantly improves the deformation resistance and service life of the connection structure.

Description

Technical Field

[0001] This utility model belongs to the field of boiler pipeline technology, and specifically relates to a boiler pipeline connection device with shock absorption function. Background Technology

[0002] In industrial boiler systems, pipe connection devices are the core components for fluid transmission between the boiler body and supporting equipment such as heat exchangers, water pumps, and dust collectors. They not only need to ensure sealing performance under high temperature and high pressure conditions, but also need to cope with vibration loads generated by combustion pulsation, medium flow impact, and equipment vibration transmission during boiler operation. If vibration cannot be effectively buffered, it can easily lead to loosening of pipe joints, cracking of welds, and even safety accidents such as medium leakage and pipe rupture. Therefore, vibration damping performance is a key design indicator for boiler pipe connection devices.

[0003] Currently, rubber flexible joints are widely used in industrial applications as a vibration damping connection solution for boiler pipelines. They absorb axial, lateral, and angular vibration displacements of the pipeline through the elastic deformation properties of natural rubber or nitrile rubber, while simultaneously utilizing the sealing properties of the rubber material to achieve media isolation. However, existing rubber flexible joints have significant limitations in boiler pipeline applications. Under high-pressure conditions, the rubber material is prone to creep deformation, leading to gaps in the joint sealing surface and increasing the risk of media leakage. Especially in steam pipelines, leaked high-temperature steam can cause corrosion of surrounding equipment or burns to personnel.

[0004] From the perspective of structural vibration reduction, the vibration reduction performance of traditional rubber flexible joints highly depends on the elasticity of the rubber itself. Their lateral displacement compensation is typically only 5-15mm, and the angular compensation angle is ≤15°. When the boiler operating load fluctuates, such as increasing from 50% to 100% load, leading to increased pipeline vibration amplitude, the rubber joint is prone to tearing due to deformation exceeding its limit. Furthermore, some rubber flexible joints lack vibration buffering structures, relying solely on a single rubber component for vibration reduction. When the pipeline experiences instantaneous impact vibrations, such as water hammer effects caused by pump start-up / shutdown or valve abrupt closure, the impact force acts directly on the rubber joint, easily causing fatigue cracks inside the rubber and shortening its service life. Moreover, once a rubber joint is damaged, it must be completely disassembled and replaced, making partial repair impossible, further increasing maintenance difficulty and cost. Therefore, existing boiler pipeline connection solutions based primarily on rubber flexible joints are unsuitable for the complex and demanding operating conditions of industrial boilers due to insufficient material temperature and corrosion resistance, limited vibration reduction compensation capacity, difficulty in balancing sealing and vibration reduction, and high maintenance costs. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a boiler pipe connection device with shock absorption function.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a boiler pipe connection device with shock absorption function, including flanges, the number of flanges being two, rubber parts being embedded in the opposite faces of the two flanges, a central connecting plate being fixed between the two rubber parts, connecting side plates being provided on both sides of the central connecting plate, and a connector being fixedly installed at one end of each of the two connecting side plates, the connector being located on the outside of the flanges, and the two connectors being designed symmetrically.

[0007] The surface of the central connecting plate has symmetrical trapezoidal cavities, and the inner side of the trapezoidal cavity is provided with a damping rod, the surface of which is fitted with an elastic element.

[0008] Preferably, both ends of one side of the connector are provided with embedding cavities, and fastening bolts are provided inside the embedding cavities.

[0009] Preferably, the fastening bolt extends through the connecting member to the inside of the flange, and both the connecting member and the flange have mounting holes on their inner sides.

[0010] Preferably, the mounting hole and the threaded end of the fastening bolt are mutually engaged, and the mounting hole and the fastening bolt are mutually threaded.

[0011] Preferably, both ends of the damping rod are provided with mounting parts, and a rotating shaft is fixedly connected to the inner side of the mounting part. The rotating shaft passes through one end of the damping rod and is rotatably connected to the damping rod through a bearing.

[0012] Preferably, the mounting component at one end of the damping rod is located inside the trapezoidal cavity and is fixedly connected to the middle connecting plate, while the mounting component at the other end of the damping rod is fixedly connected to the connecting side plate.

[0013] Preferably, the two ends of the damping rod surface are respectively welded and fixed with a first sleeve plate and a second sleeve plate located at both ends of the elastic element.

[0014] Preferably, the two ends of the elastic element are fixedly connected to the first sleeve plate and the second sleeve plate, respectively.

[0015] In summary, this utility model has the following beneficial effects:

[0016] 1. When the flange experiences vibration due to external factors, the rubber component between the flange and the connecting component can initially buffer and offset the vibration by virtue of its flexible material properties. At the same time, the symmetrical design of the two rubber components can form a two-way synergistic buffering effect, effectively dispersing the vibration stress transmitted by the flange and preventing the deformation of a single rubber component from exceeding its limit due to excessive local stress. This is different from the problem of rubber component tearing that easily occurs in existing flexible connections, and significantly improves the deformation resistance and service life of the connection structure.

[0017] 2. During installation, the fastening bolts securely connect the connectors to the flanges. Two connectors are respectively installed on the outer sides of the two flanges, symmetrically distributed at 180° with the central connecting plate as the center. This ensures the connecting side plates are stably and symmetrically positioned on the outer side of the central connecting plate, guaranteeing balanced stress on the overall structure. Furthermore, the fastening bolts are embedded in the recessed cavity, preventing them from protruding from the outside of the connectors and effectively avoiding wear caused by external forces during use.

[0018] 3. When the amplitude of the upper rubber component attempts to be transmitted to the lower rubber component through the middle connecting plate, the middle connecting plate will be linked with the upper and lower rubber components and generate an adaptive amplitude accordingly. During this process, the damping rod and the spring work together to efficiently buffer the relative vibration between the connecting side plate and the middle connecting plate, greatly reducing the intensity of vibration transmission. This structure can effectively dissipate the instantaneous stress generated by vibration transmission, avoid the problem of breakage and damage of the connection parts caused by stress concentration in traditional rigid connections, and further ensure the stability and service life of the overall connection structure. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is an exploded view of the connector, connecting side plate, and mounting bolts of this utility model;

[0021] Figure 3 This is an enlarged schematic diagram of the connecting plate in the middle of this utility model;

[0022] Figure 4 This is an enlarged exploded view of the damping rod and spring of this utility model.

[0023] Figure label:

[0024] 1. Middle connecting plate; 101. Rubber parts; 102. Flange parts;

[0025] 2. Connecting parts; 201. Connecting side plate;

[0026] 3. Fastening bolts; 301. Embedded cavity; 302. Mounting hole;

[0027] 4. Trapezoidal cavity; 401. End plate;

[0028] 5. Damping rod;

[0029] 6. Mounting components; 601. Rotating shaft;

[0030] 7. Socket plate one; 701. Socket plate two;

[0031] 8. Elastic components. Detailed Implementation

[0032] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0033] The specific embodiments of this utility model are described below with reference to the accompanying drawings:

[0034] Example:

[0035] refer to Figures 1-4 A boiler pipe connection device with shock absorption function includes two flanges 102. Rubber parts 101 are embedded in the opposite faces of the two flanges 102. A central connecting plate 1 is fixed between the two rubber parts 101. Connecting side plates 201 are provided on both sides of the central connecting plate 1. A connector 2 is fixedly installed at one end of each of the two connecting side plates 201. The connector 2 is located on the outside of the flange 102. The two connectors 2 are designed symmetrically.

[0036] The surface of the central connecting plate 1 is provided with mutually symmetrical trapezoidal cavities 4, and the inner side of the trapezoidal cavity 4 is provided with a damping rod 5, and the surface of the damping rod 5 is sleeved with an elastic element 8.

[0037] Specifically, when the flange 102 vibrates due to external factors, the rubber component 101 between the flange 102 and the connector 2 can initially buffer and offset the amplitude due to its flexible material properties. At the same time, the symmetrical design of the two rubber components 101 can form a bidirectional synergistic buffering effect, effectively dispersing the vibration stress transmitted by the flange 102 and preventing the deformation of a single rubber component 101 from exceeding its limit due to excessive local stress. This is different from the problem of rubber component 101 tearing that easily occurs in existing flexible connections, and significantly improves the deformation resistance and service life of the connection structure.

[0038] Both ends of one side of the connector 2 are provided with embedded cavities 301. The inner side of the embedded cavity 301 is provided with fastening bolts 3. The fastening bolts 3 pass through the connector 2 to the inner side of the flange 102. The inner sides of the connector 2 and the flange 102 are provided with mounting holes 302. The mounting holes 302 and the threaded ends of the fastening bolts 3 are mutually engaged, and the mounting holes 302 and the fastening bolts 3 are mutually threaded.

[0039] Specifically, the connector 2 can be fastened to the flange 102 by fastening bolts 3. The mounting hole 302 is threaded to fasten the fastening bolts 3, and the fastening bolts 3 are embedded in the embedded cavity 301, so that the fastening bolts 3 do not protrude from the outside of the connector 2, effectively avoiding wear caused by external forces during use.

[0040] Both ends of the damping rod 5 are provided with mounting parts 6. A rotating shaft 601 is fixedly connected to the inner side of the mounting part 6. The rotating shaft 601 passes through one end of the damping rod 5 and is rotatably connected to the damping rod 5 through a bearing. The mounting part 6 at one end of the damping rod 5 is located inside the trapezoidal cavity 4 and is fixedly connected to the middle connecting plate 1. The mounting part 6 at the other end of the damping rod 5 is fixedly connected to the connecting side plate 201.

[0041] Specifically, during the damping rod 5's vibration reduction and contraction process, its two ends form a flexible connection structure with the mounting part 6 through the rotating shaft 601, avoiding the problem of breakage or damage to the connection part due to stress concentration; at the same time, with the damping buffer characteristics of the damping rod 5, the relative vibration between the connecting side plate 201 and the middle connecting plate 1 can be effectively buffered.

[0042] The two ends of the damping rod 5 are respectively welded and fixed with sleeve plate 7 and sleeve plate 701 located at both ends of the elastic member 8. The two ends of the elastic member 8 are respectively fixedly connected to the sleeve plate 7 and sleeve plate 701.

[0043] Specifically, during the operation of the damping rod 5, the elastic element 8 can cooperate with the moving contraction end and the fixed end of the damping rod 5. When the damping rod 5 is subjected to external force and causes contraction or extension, the elastic element 8 will simultaneously perform adaptive contraction or extension.

[0044] The working principle of this utility model is as follows: In the connection of boiler pipes, one end of each of the two external connecting pipes is fastened to the two flanges 102 by external bolts. The flange 102 is designed with a protruding rubber part 101 that penetrates through the flange 102 on the side away from the rubber part 101, which helps to improve the sealing effect when the flange 102 is installed and connected to the external connecting pipe.

[0045] Subsequently, the connecting piece 2 and the flange piece 102 are fastened together using the fastening bolts 3. The two connecting pieces 2 are respectively installed on the outer sides of the two flange pieces 102, and are symmetrically distributed at 180° with the central connecting plate 1 as the center. This ensures that the connecting side plate 201 is stably and symmetrically positioned on the outer side of the central connecting plate 1, ensuring that the overall structure is subjected to balanced forces. When the flange piece 102 experiences amplitude due to external factors, the rubber part 101 between the flange piece 102 and the connecting piece 2 can initially buffer and offset the amplitude due to its flexible material properties. At the same time, the symmetrical design of the two rubber parts 101 can form a two-way synergistic buffering effect, effectively dispersing the vibration stress transmitted by the flange piece 102, and preventing the deformation of a single rubber part 101 from exceeding its limit due to excessive local stress. This is different from the problem of rubber part 101 tearing that easily occurs in existing flexible connections, and significantly improves the deformation resistance and service life of the connection structure.

[0046] When the amplitude of the upper rubber component 101 is to be transmitted to the lower rubber component 101 through the middle connecting plate 1, the middle connecting plate 1 connects them and cooperates to generate the amplitude. Through the synergy of the damping rod 5 and the spring, the relative vibration between the connecting side plate 201 and the middle connecting plate 1 can be efficiently buffered. Simultaneously, during the damping and contraction of the damping rod 5, its two ends form a flexible connection structure with the mounting component 6 through the rotating shaft 601, avoiding breakage or damage to the connection points due to stress concentration. In this embodiment, the elastic component 8 is a spring, but is not limited to shape memory alloys, torsion springs, etc.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A boiler pipe connection device with shock absorption function, comprising flanges (102), wherein there are two flanges (102), and rubber parts (101) are embedded in the opposite faces of the two flanges (102), characterized in that: A central connecting plate (1) is fixed between the two rubber parts (101). Both sides of the central connecting plate (1) are provided with connecting side plates (201). A connector (2) is fixedly installed at one end of each of the two connecting side plates (201). The connector (2) is located outside the flange part (102). The two connectors (2) are designed to be symmetrical to each other. The surface of the central connecting plate (1) is provided with mutually symmetrical trapezoidal cavities (4). A damping rod (5) is provided on the inner side of the trapezoidal cavity (4). An elastic element (8) is sleeved on the surface of the damping rod (5). Both ends of the damping rod (5) are provided with mounting parts (6). A rotating shaft (601) is fixedly connected to the inner side of the mounting part (6). The rotating shaft (601) passes through one end of the damping rod (5) and is rotatably connected to the damping rod (5) through a bearing. The mounting part (6) located at one end of the damping rod (5) is located inside the trapezoidal cavity (4) and is fixedly connected to the central connecting plate (1). The mounting part (6) located at the other end of the damping rod (5) is fixedly connected to the connecting side plate (201).

2. The boiler pipe connection device with shock absorption function according to claim 1, characterized in that: The connector (2) has an embedded cavity (301) at both ends on one side, and a fastening bolt (3) is provided on the inner side of the embedded cavity (301).

3. The boiler pipe connection device with shock absorption function according to claim 2, characterized in that: The fastening bolt (3) passes through the connector (2) to the inside of the flange (102), and the connector (2) and the flange (102) are both provided with mounting holes (302).

4. The boiler pipe connection device with shock absorption function according to claim 3, characterized in that: The mounting hole (302) and the threaded end of the fastening bolt (3) are mutually engaged, and the mounting hole (302) and the fastening bolt (3) are mutually threaded.

5. The boiler pipe connection device with vibration damping function according to claim 1, characterized in that: The two ends of the damping rod (5) are respectively welded and fixed with sleeve plate one (7) and sleeve plate two (701) located at both ends of the elastic element (8).

6. The boiler pipe connection device with shock absorption function according to claim 5, characterized in that: The two ends of the elastic element (8) are fixedly connected to each other between the first sleeve plate (7) and the second sleeve plate (701).

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