Self-adjusting bellow expansion joint

Abstract

The utility model discloses a self-adjusting type bellow expansion joint which comprises an expansion joint body and a connecting assembly. The connecting assembly comprises a first fixing rod arranged outside the expansion joint body, a first nut in threaded connection with the first fixing rod, a first connecting rod penetrating through the first fixing rod, a stud arranged at the front end of the first connecting rod, a third nut in threaded connection with the stud and angle scale marks arranged at the front end of the first connecting rod. The second connecting rod is inserted in the stud in a penetrating mode, the through hole is formed in the second connecting rod, the second fixing rod penetrates through the second connecting rod, and the second nut is in threaded connection with the second fixing rod. The first nut, the second nut and the third nut of the connecting assembly can be unscrewed, the first connecting rod and the second connecting rod can be rotated after the nuts are unscrewed so that the bending angle of the expansion joint body can be adjusted, and meanwhile the formed through hole can be aligned with the angle scale line of the first connecting rod so that the bending angle of the expansion joint body can be accurately adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joints, in particular to a self-adjusting bellows expansion joint. Background Art

[0002] An expansion joint is a flexible element that can effectively compensate for axial deformation. For example, the expansion joint welded on the fixed tube sheet heat exchanger shell has large axial flexibility and is easy to deform, which can compensate for the thermal expansion difference between the tube and the shell due to different wall temperatures. Among them, there are many types of expansion joints, and the commonly used ones are corrugated, ring plate welding and sandwich shell structures. Among them, the corrugated expansion joint is the most widely used. Because it can be adjusted by itself, it is also called a self-adjusting corrugated expansion joint.

[0003] After searching, the patent with announcement number CN219413943U discloses a self-adjusting bellows expansion joint, and its content records "including two symmetrically arranged mounting plates, a bellows is arranged between the two mounting plates, connecting plates are fixedly arranged on both sides of the mounting plates, screws are threadedly penetrated through the inner parts of two connecting plates in the longitudinal direction, nuts are threadedly sleeved between the screws and the connecting plates, slots are opened on the adjacent sides of the two mounting plates, the pipe mouth of the bellows is inserted into the slots, two symmetrically arranged first fixing plates are fixedly arranged on the outer side of the mounting plates, and two symmetrically arranged second fixing plates are fixedly arranged on the outer side of the pipe mouth of the bellows. The utility model can complete the bellows by plugging the positioning rod and the second fixing plate..." The expansion joint of this patent cannot adjust the angle, and the flanges at both ends can only face the two pipes during installation. It is difficult to install and has poor practicality, which has certain shortcomings. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art or related technologies.

[0005] To this end, the technical solution adopted by the utility model is: a self-adjusting corrugated expansion joint, including an expansion joint body and a connecting assembly, the connecting assembly including a first fixing rod arranged outside the expansion joint body, a first nut threadedly connected to the first fixing rod, a first connecting rod inserted on the first fixing rod, a stud arranged at the front end of the first connecting rod, a third nut threadedly connected to the stud, an angle scale line arranged at the front end of the first connecting rod, a second connecting rod inserted on the stud, a through hole opened on the second connecting rod, a second fixing rod penetrating the second connecting rod and a second nut threadedly connected to the second fixing rod.

[0006] Preferably, a telescopic threaded section is provided on the expansion joint body, end plates are provided at both ends of the expansion joint body, a temperature sensor is provided on the inner wall of the expansion joint body, and the temperature sensor is electrically connected to an external control device.

[0007] Preferably, the first nut, the second nut and the third nut have the same structure.

[0008] Preferably, the second fixing rod is arranged outside the expansion joint body.

[0009] Preferably, two connecting components are provided, and the two connecting components are symmetrically distributed.

[0010] Preferably, it further comprises a fixing seat, a sound and light alarm is arranged on the top of the fixing seat, and the sound and light alarm is electrically connected to the external control device.

[0011] By adopting the above technical scheme, the beneficial effects achieved by the utility model are as follows: the first nut, the second nut and the third nut of the connecting assembly provided in the utility model can be loosened, and the first connecting rod and the second connecting rod can be rotated after loosening to adjust the bending angle of the expansion joint body, and at the same time, the through hole of the second connecting rod can be aligned with the angle scale line of the first connecting rod to accurately adjust the bending angle of the expansion joint body, and then the temperature sensor provided can detect the temperature of the fluid inside the expansion joint body in real time, and when the temperature is too high, it can be fed back to the external control device, and the external control device can control the sound and light alarm to send an alarm sound to remind people to avoid excessive temperature damaging the expansion joint body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is a structural schematic diagram of the main body of the expansion joint of the utility model;

[0014] Figure 3 It is a structural schematic diagram of the first connecting rod of the utility model;

[0015] Figure 4 It is a structural schematic diagram of the second connecting rod of the utility model.

[0016] Reference numerals:

[0017] 100, expansion joint body; 110, telescopic threaded section; 120, end plate; 130, temperature sensor;

[0018] 200, connecting assembly; 210, first fixing rod; 211, first nut; 220, second fixing rod; 221, second nut; 230, first connecting rod; 231, stud; 232, third nut; 233, angle scale line; 240, second connecting rod; 241, through hole;

[0019] 300. Fixed seat; 310. Sound and light alarm. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0021] Some embodiments of the present invention are described below in conjunction with the accompanying drawings to provide a self-adjusting bellows expansion joint.

[0022] Embodiment 1:

[0023] Reference Figure 1 and Figure 3 , which is the first embodiment of the utility model, provides a self-adjusting bellows expansion joint, including an expansion joint body 100 and a connecting assembly 200.

[0024] Specifically, a telescopic threaded section 110 is provided on the expansion joint body 100, and the telescopic threaded section 110 can be telescopically bent for compensation. End plates 120 are provided at both ends of the expansion joint body 100. A plurality of mounting holes are opened on the end plates 120 for fixing by bolts. A temperature sensor 130 is provided on the inner wall of the expansion joint body 100. The temperature sensor 130 is electrically connected to an external control device. The temperature sensor 130 can detect the temperature of the fluid inside the expansion joint body 100 in real time, and convert it into a signal for transmission to the external control device.

[0025] Specifically, the connection assembly 200 includes a first fixing rod 210 disposed outside the expansion joint body 100, a first nut 211 threadedly connected to the first fixing rod 210, a first connecting rod 230 inserted on the first fixing rod 210, a stud 231 disposed at the front end of the first connecting rod 230, a third nut 232 threadedly connected to the stud 231, an angle scale line 233 disposed at the front end of the first connecting rod 230, a second connecting rod 240 inserted on the stud 231, a through hole 241 opened on the second connecting rod 240, and a second fixing rod 230 passing through the second connecting rod 240. The rod 220 and the second nut 221 threadedly connected to the second fixing rod 220, the second fixing rod 220 is arranged on the outside of the expansion joint body 100, the first nut 211, the second nut 221 and the third nut 232 can be loosened, and the first connecting rod 230 and the second connecting rod 240 can be rotated after loosening, and the through hole 241 of the second connecting rod 240 can be aligned with the angle scale line 233 of the first connecting rod 230 during rotation, and the first nut 211, the second nut 221 and the third nut 232 can be tightened after rotating to a suitable position, so as to accurately adjust the bending angle of the expansion joint body 100.

[0026] Furthermore, the first nut 211 , the second nut 221 and the third nut 232 have the same structure.

[0027] It should be noted that two connection assemblies 200 are provided, and the two connection assemblies 200 are symmetrically distributed. Both connection assemblies 200 can be adjusted and fixed, which can improve the stability of the expansion joint body 100.

[0028] Embodiment 2:

[0029] Reference Figure 1 and Figure 2 , which is the second embodiment of the utility model, is different from the first embodiment in that it also includes a fixing base 300, and a sound and light alarm 310 is arranged on the top of the fixing base 300. The sound and light alarm 310 is electrically connected to the external control device. When the temperature is too high, it can be fed back to the external control device. The external control device that receives the feedback can control the sound and light alarm 310 to emit an alarm sound to remind people to avoid damage to the expansion joint body 100 due to excessive temperature.

[0030] The working principle and use process of the utility model are as follows: when in use, the first nut 211, the second nut 221 and the third nut 232 of the connecting assembly 200 can be loosened, and the first connecting rod 230 and the second connecting rod 240 can be rotated after loosening, and the first nut 211, the second nut 221 and the third nut 232 can be tightened after rotating to a suitable position, so as to adjust the bending angle of the expansion joint body 100. When adjusting the angle at the same time, the through hole 241 of the second connecting rod 240 can be aligned with the angle scale line 233 of the first connecting rod 230, so as to accurately adjust the bending angle of the expansion joint body 100. During use, the temperature sensor 130 can detect the temperature of the fluid inside the expansion joint body 100 in real time, and can feed back to the external control device when the temperature is too high. The external control device receiving the feedback can control the sound and light alarm 310 to sound an alarm, so as to remind people to avoid damage to the expansion joint body 100 due to excessive temperature.

[0031] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. Self-adjusting bellows expansion joint, characterized in that: include: Expansion joint body (100); A connection assembly (200) comprises a first fixing rod (210) arranged outside the expansion joint body (100), a first nut (211) threadedly connected to the first fixing rod (210), a first connecting rod (230) inserted into the first fixing rod (210), a stud (231) arranged at the front end of the first connecting rod (230), a third nut (232) threadedly connected to the stud (231), an angle scale line (233) arranged at the front end of the first connecting rod (230), a second connecting rod (240) inserted into the stud (231), a through hole (241) provided in the second connecting rod (240), a second fixing rod (220) penetrating the second connecting rod (240), and a second nut (221) threadedly connected to the second fixing rod (220).

2. The self-adjusting bellows expansion joint according to claim 1, characterized in that: The expansion joint body (100) is provided with a telescopic threaded section (110), both ends of the expansion joint body (100) are provided with end plates (120), the inner wall of the expansion joint body (100) is provided with a temperature sensor (130), and the temperature sensor (130) is electrically connected to an external control device.

3. The self-adjusting bellows expansion joint according to claim 1, characterized in that: The first nut (211), the second nut (221) and the third nut (232) have the same structure.

4. The self-adjusting bellows expansion joint according to claim 1, characterized in that: The second fixing rod (220) is arranged outside the expansion joint body (100).

5. The self-adjusting bellows expansion joint according to claim 1, characterized in that: Two connecting components (200) are provided, and the two connecting components (200) are symmetrically distributed.

6. The self-adjusting bellows expansion joint according to claim 1, characterized in that: It also comprises a fixing seat (300), the top of which is provided with an audible and visual alarm (310), and the audible and visual alarm (310) is electrically connected to an external control device.

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