Boiler evaporator expansion joint convenient to connect

Abstract

The utility model relates to the technical field of expansion joints, in particular to a boiler evaporator expansion joint convenient to connect, which comprises a corrugated pipe and a positioning mechanism. The device has the beneficial effects that when the expansion joint needs to be installed and connected, the stop lever can be pulled firstly to extrude the reset spring, then the flange of the pipeline is in butt joint with the flange plate, then the stop lever is loosened, the reset spring rebounds to drive the stop lever to abut against one side of the flange of the pipeline, and a worker does not need to hold the expansion joint all the time and then pull the limiting rod; a limiting rod slides in a sliding groove and extrudes a supporting spring, one end of the limiting rod is separated from a limiting hole, then a limiting screw rod is rotationally inserted, a flange plate and a flange of a pipeline are rapidly connected, and a first protective cover, an extension cover and a second protective cover protect the exterior of the expansion joint; the installation and connection work efficiency of the boiler evaporator expansion joint is improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joints, in particular to an expansion joint for a boiler evaporator which is easy to connect. Background Art

[0002] The boiler evaporator is one of the core components in the boiler system, and is mainly responsible for converting water into steam. It plays a vital role in the boiler and is one of the key links in energy conversion. An expansion joint is installed on the pipeline of the boiler evaporator. Its main function is to deal with the thermal expansion and contraction caused by temperature changes during the operation of the boiler, thereby protecting the boiler pipeline and equipment from damage by thermal stress.

[0003] However, in the use of the existing boiler evaporator expansion joint, when installing the expansion joint on the boiler evaporator, the staff needs to align the flange of the pipeline with the flange of the expansion joint, and manually support it all the time, and then connect the flanges with bolts, which is troublesome, and a lot of bolts need to be carried, and the bolts are easy to lose, which reduces the installation and connection efficiency of the expansion joint. Therefore, we propose a boiler evaporator expansion joint that is easy to connect. Utility Model Content

[0004] The utility model aims to provide a boiler evaporator expansion joint which is easy to connect, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a boiler evaporator expansion joint that is easy to connect, comprising a bellows and a positioning mechanism, flanges are connected to both ends of the bellows, an inner side of the flange is provided with annularly distributed through holes, the inner side of the through holes passes through a limiting screw, a threaded portion is provided on the outside of the limiting screw, the threaded portion and the through hole are threadedly connected, the positioning mechanism is installed on the outside of the flange, a limiting mechanism is provided on the inside of the flange near the limiting screw, a protective mechanism is provided on the positioning mechanism and the outside of the bellows, a docking hole is provided on the side of the positioning mechanism near the protective mechanism, the positioning mechanism comprises a baffle rod, a reset spring and a fixed block, and a fixed block is fixed on the outside of the flange.

[0006] Preferably, a blocking rod is slidably penetrated through the inner side of the fixing block, a return spring is penetrated through the outer side of the blocking rod, and the docking hole is provided on one side of the fixing block.

[0007] Preferably, the limiting mechanism comprises a supporting spring, a limiting rod and a sliding groove, the interior of the flange is provided with a sliding groove, and the interior of the sliding groove is provided with a supporting spring.

[0008] Preferably, a limiting rod is provided on one side of the support spring, the limiting rod and the slide groove are slidably connected, and a limiting hole is provided on one side of the limiting screw.

[0009] Preferably, a sealing ring is provided on the inner side of the fixing block close to the flange, a fastening ring is threadedly sleeved on the outer side of the limiting screw, and a mounting screw is provided on the outer side of the protective mechanism.

[0010] Preferably, the protective mechanism includes a docking block, a No. 1 protective cover, an extension cover and a No. 2 protective cover, and a No. 1 protective cover and a No. 2 protective cover are provided on the outer sides of the fixed block and the bellows, and the No. 1 protective cover is connected to an extension cover on one side close to the No. 2 protective cover.

[0011] Preferably, the extension cover and the second protective cover are slidably connected, and the first protective cover and the second protective cover are both connected to a docking block on one side close to the fixed block.

[0012] Preferably, a plug-in structure is formed between the docking hole and the docking block, and outer sides of the No. 1 protective cover and the No. 2 protective cover are both threadedly connected to the mounting screw.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model provides a boiler evaporator expansion joint that is easy to connect. When the expansion joint needs to be installed and connected, the stop rod can be pulled first to make the stop rod squeeze the reset spring, and then the flange of the pipeline and the flange plate can be connected, and then the stop rod can be loosened to make the reset spring rebound and drive the stop rod to press against one side of the pipeline flange. The staff does not need to hold the expansion joint all the time, and then the limit rod is pulled to make the limit rod slide in the slide groove and squeeze the supporting spring, so that one end of the limit rod is disengaged from the limit hole, and then the limit screw is rotated and inserted to make the flange plate and the flange of the pipeline quickly connected. The setting of the limit rod can limit the limit screw in the flange plate, and the setting of the stop rod can limit the position of the pipeline flange. In addition, the No. 1 protective cover, the extension cover and the No. 2 protective cover protect the outside of the expansion joint, thereby improving the installation and connection work efficiency of the boiler evaporator expansion joint and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the main cross-sectional structure of the first protective cover of the utility model;

[0017] Figure 3 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0018] Figure 4 It is a schematic diagram of the side cross-sectional structure of the utility model;

[0019] Figure 5 This is a schematic diagram of the side cross-sectional structure of the second protective cover of the utility model;

[0020] Figure 6 This is an enlarged structural diagram of the utility model at A;

[0021] Figure 7 This is a schematic diagram of the three-dimensional structure of the extension cover of the utility model;

[0022] Figure 8 It is a schematic diagram of the three-dimensional structure of the limiting screw of the utility model.

[0023] In the figure: 1, bellows; 2, flange; 3, through hole; 4, threaded portion; 5, limit screw; 6, protection mechanism; 601, docking block; 602, No. 1 protection cover; 603, extension cover; 604, No. 2 protection cover;

[0024] 7. Sealing ring; 8. Limiting mechanism; 801. Support spring; 802. Limiting rod; 803. Slide groove; 9. Positioning mechanism; 901. Stop rod; 902. Return spring; 903. Fixing block; 10. Limiting hole; 11. Fastening ring; 12. Docking hole; 13. Mounting screw. DETAILED DESCRIPTION

[0025] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1

[0027] See also Figure 1-Figure 6 and Figure 8 The utility model provides a technical solution: a boiler evaporator expansion joint that is easy to connect, including a bellows 1 and a positioning mechanism 9, the two ends of the bellows 1 are connected with flanges 2, the inner side of the flange 2 is provided with annular through holes 3, the inner side of the through hole 3 passes through a limiting screw 5, the outer side of the limiting screw 5 is provided with a threaded portion 4, the threaded portion 4 and the through hole 3 are threadedly connected, the positioning mechanism 9 is installed on the outer side of the flange 2, the fixing block 903 is provided with a sealing ring 7 near the inner side of the flange 2, and the outer side of the limiting screw 5 is threadedly sleeved with a fastening ring 11.

[0028] In specific implementation, by inserting the limiting screw 5 into the through hole 3 and installing the flange 2 on the pipeline, the expansion joint can be installed on the boiler evaporator, and the sealing ring 7 seals the interface of the flange 2.

[0029] Embodiment 2

[0030] See also Figure 1-Figure 6 and Figure 8 On the basis of the first embodiment, the flange 2 is provided with a limiting mechanism 8 near the limiting screw 5, the positioning mechanism 9 and the outer side of the bellows 1 are provided with a protective mechanism 6, the positioning mechanism 9 is provided with a docking hole 12 on the side close to the protective mechanism 6, the positioning mechanism 9 includes a stopper 901, a return spring 902 and a fixing block 903, the outer side of the flange 2 is fixed with a fixing block 903, the inner side of the fixing block 903 is slidably penetrated by the stopper 901, the outer side of the stopper 901 is penetrated by the return spring 902, and the docking hole 12 is provided with a stopper 901, a return spring 902 and a stopper 901. 2 is opened on one side of the fixed block 903, the limiting mechanism 8 includes a supporting spring 801, a limiting rod 802 and a sliding groove 803, the interior of the flange 2 is provided with a sliding groove 803, the interior of the sliding groove 803 is provided with a supporting spring 801, a limiting rod 802 is provided on one side of the supporting spring 801, the limiting rod 802 and the sliding groove 803 are in sliding connection, a limiting hole 10 is opened on one side of the limiting screw 5, a mounting screw 13 is provided on the outer side of the protective mechanism 6, and the cross-sectional shape of the limiting rod 802 is "L"-shaped.

[0031] In specific implementation, when installing the expansion joint on the boiler evaporator, the staff needs to align the flange of the pipe with the flange of the expansion joint, and it needs to be manually supported all the time, and then the flanges are connected by bolts, which is troublesome, and a lot of bolts need to be carried, and the bolts are easy to lose, which reduces the installation and connection efficiency of the expansion joint. When the expansion joint needs to be installed and connected, the blocking rod 901 can be pulled first to make the blocking rod 901 squeeze the reset spring 902, and then the flange of the pipe and the flange 2 are connected, and then the blocking rod 901 is loosened to make the reset spring 902 return The spring drives the stop rod 901 to rest on one side of the pipe flange, so the staff does not need to hold the expansion joint all the time. Then the limit rod 802 is pulled to make the limit rod 802 slide in the slide groove 803 and squeeze the support spring 801, so that one end of the limit rod 802 is disengaged from the limit hole 10, and then the limit screw 5 is rotated and inserted to make a quick connection between the flange 2 and the flange of the pipe. The setting of the limit rod 802 can limit the limit screw 5 in the flange 2, and the setting of the stop rod 901 can limit the position of the pipe flange, thereby improving the installation and connection efficiency of the boiler evaporator expansion joint.

[0032] Embodiment 3

[0033] See also Figure 1-Figure 5 and Figure 7On the basis of the second embodiment, the protection mechanism 6 includes a docking block 601, a No. 1 protective cover 602, an extension cover 603 and a No. 2 protective cover 604. The outer sides of the fixed block 903 and the bellows 1 are provided with a No. 1 protective cover 602 and a No. 2 protective cover 604. The No. 1 protective cover 602 is connected to the extension cover 603 on the side close to the No. 2 protective cover 604. The extension cover 603 and the No. 2 protective cover 604 are slidably connected. The No. 1 protective cover 602 and the No. 2 protective cover 604 are both connected to the docking block 601 on the side close to the fixed block 903. The docking hole 12 and the docking block 601 are plug-in structures. The outer sides of the No. 1 protective cover 602 and the No. 2 protective cover 604 are threadedly connected to the mounting screw 13. The shapes of the No. 1 protective cover 602, the extension cover 603 and the No. 2 protective cover 604 are all arc-shaped.

[0034] In specific implementation, since most expansion joints do not have a protective structure on the outside, some objects may directly collide with the outside of the expansion joint during use, causing damage to the expansion joint. The docking block 601 can be inserted into the docking hole 12, so that the No. 1 protective cover 602 and the No. 2 protective cover 604 are plugged into the outside of the bellows 1 and the flange 2, and then the mounting screw 13 is installed at both ends of the No. 1 protective cover 602 and the No. 2 protective cover 604. The No. 1 protective cover 602 and the No. 2 protective cover 604 can be quickly installed on the outside of the expansion joint to protect the expansion joint and prevent objects from directly colliding with the expansion joint. When the bellows 1 extends to both ends, it will also drive the extension cover 603 to slide in the built-in groove of the No. 2 protective cover 604, which will not affect the extension of the bellows 1, thereby improving the safety of the boiler evaporator expansion joint and extending its service life.

[0035] In actual use, the flange 2 can be installed on the flange of the pipeline through the positioning mechanism 9 and the limiting mechanism 8, and then the position of the limiting screw 5 can be tightened by the fastening ring 11 to facilitate quick connection, and then the protective mechanism 6 can be installed on the outside of the flange 2 and the bellows 1 to protect the expansion joint. When in use, the expansion joint is used to compensate for linear or angular changes caused by temperature changes, mechanical vibrations and other factors to protect the pipeline. The setting of the positioning mechanism 9 and the protective mechanism 6 improves the installation convenience and safety of the boiler evaporator expansion joint.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A boiler evaporator expansion joint that is easy to connect, comprising a bellows (1) and a positioning mechanism (9), characterized in that: The two ends of the bellows (1) are connected to flanges (2), the inner side of the flange (2) is provided with annularly distributed through holes (3), the inner side of the through hole (3) passes through a limiting screw (5), the outer side of the limiting screw (5) is provided with a threaded portion (4), the threaded portion (4) and the through hole (3) are threadedly connected, the positioning mechanism (9) is installed on the outer side of the flange (2), the inner side of the flange (2) close to the limiting screw (5) is provided with a limiting mechanism (8), the outer side of the positioning mechanism (9) and the bellows (1) are provided with a protective mechanism (6), the side of the positioning mechanism (9) close to the protective mechanism (6) is provided with a docking hole (12), the positioning mechanism (9) comprises a stop rod (901), a return spring (902) and a fixing block (903), and the fixing block (903) is fixed to the outer side of the flange (2).

2. The expansion joint for a boiler evaporator that is easy to connect according to claim 1, characterized in that: A blocking rod (901) is slidably penetrated on the inner side of the fixing block (903), a return spring (902) is penetrated on the outer side of the blocking rod (901), and the docking hole (12) is provided on one side of the fixing block (903).

3. The expansion joint for a boiler evaporator that is easy to connect according to claim 2, characterized in that: The limiting mechanism (8) comprises a supporting spring (801), a limiting rod (802) and a sliding groove (803); the interior of the flange (2) is provided with a sliding groove (803); and the interior of the sliding groove (803) is provided with a supporting spring (801).

4. The expansion joint for a boiler evaporator that is easy to connect according to claim 3, characterized in that: A limiting rod (802) is provided on one side of the support spring (801), the limiting rod (802) and the slide groove (803) are slidably connected, and a limiting hole (10) is provided on one side of the limiting screw rod (5).

5. The expansion joint for a boiler evaporator that is easy to connect according to claim 2, characterized in that: A sealing ring (7) is provided on the inner side of the fixing block (903) close to the flange (2), a fastening ring (11) is threadedly sleeved on the outer side of the limiting screw (5), and a mounting screw (13) is provided on the outer side of the protection mechanism (6).

6. The expansion joint for a boiler evaporator that is easy to connect according to claim 5, characterized in that: The protective mechanism (6) comprises a docking block (601), a No. 1 protective cover (602), an extension cover (603) and a No. 2 protective cover (604); the No. 1 protective cover (602) and the No. 2 protective cover (604) are arranged on the outer sides of the fixed block (903) and the bellows (1); and the No. 1 protective cover (602) is connected to the extension cover (603) on one side close to the No. 2 protective cover (604).

7. The expansion joint for a boiler evaporator that is easy to connect according to claim 6, characterized in that: The extension cover (603) and the second protective cover (604) are slidably connected, and the first protective cover (602) and the second protective cover (604) are both connected to a docking block (601) on one side close to the fixed block (903).

8. The expansion joint for a boiler evaporator that is easy to connect according to claim 7, characterized in that: The docking hole (12) and the docking block (601) are connected in a plug-in structure, and the outer sides of the No. 1 protective cover (602) and the No. 2 protective cover (604) are both threadedly connected to the mounting screw rod (13).

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