Rotating equipment outlet pipeline expansion joint limiting structure

Abstract

The utility model provides a rotating equipment outlet pipeline expansion joint limiting structure, and relates to the technical field of expansion joint limiting installation, the spacing between a group of fixing steel is adjustable, a plurality of groups of fixing steel are arranged on pipeline flanges on the two sides of a rubber expansion joint, and each group of fixing steel is matched with a plurality of groups of fixing bolts to achieve position locking. And meanwhile, the long screw plays a role in double limiting the expansion joint, when the rubber expansion joint extends and expands outwards due to dynamic pressure, the double nuts on the outer side limit the expansion amount, and when the rubber expansion joint is compressed, the double nuts on the inner side play a role in compression limiting. Therefore, the safety of the expansion joint is guaranteed when the state of the rotating equipment outlet pipeline changes sharply, and the large bearing capacity is guaranteed when the state of the rotating equipment outlet pipeline changes due to the adoption of the fixed steel type.

Description

Technical Field

[0001] This utility model relates to the field of expansion joint limiting installation technology, and more specifically, to an expansion joint limiting structure for the outlet pipeline of rotating equipment. Background Technology

[0002] An expansion joint (also known as a compensator) is a flexible element used to compensate for axial, lateral, and angular displacements in pipelines or containers caused by thermal expansion and contraction, mechanical vibration, or foundation settlement. Rubber expansion joints are a type of expansion joint, which are flexible connection devices made of elastic rubber material and reinforcing layers (such as polyester fiber, nylon cord, or metal skeleton). They are used in pipeline systems to compensate for displacement, absorb vibration, isolate noise, and adapt to axial, lateral, and angular displacements caused by temperature changes, mechanical movement, or foundation settlement.

[0003] Rotating equipment falls under the category of moving equipment, referring to equipment that achieves energy conversion or media transportation through mechanical motion. This includes pumps and fans. Currently, when using pumps / fans to transport liquids / solid particles, expansion joints need to be installed on the pipelines. However, during the start-up, shutdown, and operation of the pump / fan outlet pipeline, the liquid / solid particles in the pipeline will generate dynamic pressure at the outlet pipeline bends and expansion joints, creating an impact on the pipeline. This causes pipeline vibration and expansion joint elongation or contraction exceeding the design value, ultimately leading to frequent pipeline leaks or expansion joint damage.

[0004] Announcement No. CN211398894U proposes a pump outlet expansion joint limiting compensation device, which can effectively constrain the expansion joint. However, the distance between the two locking parts in the prior art limiting card is a fixed value and cannot be adjusted. Therefore, it can only limit the elongation displacement of the expansion joint and cannot control the compression displacement of the expansion joint when the medium in the outlet pipeline of rotating equipment changes temperature or flow drastically. The expansion joint will age faster if it is repeatedly subjected to unrestricted compression for a long time. At the same time, the contact area between the limiting card and the pipeline flange surface needs to be further improved. In summary, the current expansion joint limiting device has the above problems and urgently needs to be solved. Utility Model Content

[0005] The purpose of this utility model is to solve the problems mentioned in the background art, and then to propose a limiting structure for the expansion joint of the outlet pipe of a rotating equipment.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A limiting structure for an expansion joint of a rotating equipment outlet pipe includes a rubber expansion joint and a pipe. The rubber expansion joint has a flange with a plurality of first threaded holes circumferentially formed thereon. A flange is provided on the mating surface of the pipe, and the flange has second threaded holes circumferentially formed thereon, each corresponding to one of the first threaded holes and having the same diameter. The structure also includes a split flange, a fixing steel rod, an arc section, primary threaded holes, secondary threaded holes, fixing bolts, a long threaded rod, a first adjusting nut, and a second adjusting nut.

[0008] The split flange is fitted with a rubber expansion joint, and the split flange has a third threaded hole with the same diameter as the first threaded hole;

[0009] Several sets of fixing steel have arc-shaped portions that fit against the outer wall of the pipe, and the length of the fixing steel is greater than the distance between the outer edge of the flange and the inner hole. Each set of fixing steel includes two fixing steels that are in the same vertical direction and are directly opposite each other.

[0010] The primary threaded hole is located at the end of the fixed steel that is furthest from the flange.

[0011] Two secondary threaded holes, symmetrically distributed about the primary threaded holes, are opened on the fixed steel and correspond one-to-one with the secondary threaded holes and have the same diameter;

[0012] The fixing bolts pass through the third threaded hole, the first threaded hole, the second threaded hole, and the secondary threaded hole in sequence to lock the split flange and fix the position of the steel.

[0013] The two ends of the long screw pass through two primary threaded holes on a set of fixing steel.

[0014] The first adjusting nut and the second adjusting nut are respectively threadedly connected to the long screw and are located on both sides of the fixed steel.

[0015] Furthermore, the outer side of the split flange is flush with the flange, and the inner side of the split flange is fitted with the rubber expansion joint.

[0016] Furthermore, the two flanges of the split flange are respectively provided with symmetrically distributed semi-circular holes, and the two semi-circular holes can form a third threaded hole.

[0017] Furthermore, at least two sets of fixing steel are installed on the flange.

[0018] Furthermore, the diameter of the primary threaded hole is smaller than the diameter of the secondary threaded hole.

[0019] Furthermore, two first adjusting nuts and two second adjusting nuts are threaded onto one of the long screws.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. In this application, the two-part split flange is used to install the rubber expansion joint to both ends in sequence. This avoids the difficulty of flange installation caused by the flange being turned up. At the same time, the two are easy to separate when the rubber expansion joint needs to be replaced later.

[0022] 2. In this application, the spacing between a set of fixed steel bars is adjustable. By configuring multiple sets of fixed steel bars on the pipe flanges on both sides of the rubber expansion joint, and each set of fixed steel bars cooperating with multiple sets of fixed bolts to achieve position locking, the stress points are increased, avoiding leakage caused by uneven stress on a single set of bolts. At the same time, the long screw acts as a double limiter for the expansion joint. When the rubber expansion joint extends outward due to dynamic pressure, the outer nut limits the expansion amount, and when compressed, the inner nut acts as a compression limiter, thereby ensuring the safety of the expansion joint when the condition of the outlet pipe of the rotating equipment changes drastically. The use of fixed steel bars ensures a larger load-bearing capacity when the condition of the outlet pipe of the rotating equipment changes.

[0023] 3. In this application, after the curved part on the fixed steel is in contact with the pipeline, the expansion and contraction dynamic pressure generated by the subsequent operation of the rotating equipment on the rubber expansion joint can be transmitted to the pipeline, avoiding the phenomenon of excessive force on a single object, thereby extending the service life of the rubber expansion joint. In addition, the contact area between the fixed steel and the flange is further expanded, resulting in a more secure limiting effect. Under the dual action of the fixing bolts and the long screw, the fixed steel will not shift its position. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the curved section;

[0026] Figure label:

[0027] 1. Rubber expansion joint; 101. Flanged edge; 2. Pipe; 3. Flange; 4. Split flange; 5. Fixing steel; 6. Curved part; 7. Primary threaded hole; 8. Secondary threaded hole; 9. Fixing bolt; 10. Long screw; 11. First adjusting nut; 12. Second adjusting nut. Detailed Implementation

[0028] The technical solutions of the present 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 the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0029] like Figure 1As shown in the figure, an expansion joint limiting structure for the outlet pipe 2 of a rotating device includes a rubber expansion joint 1 and a pipe 2. The rubber expansion joint 1 has a flange 101 with several first threaded holes circumferentially formed on its circumference. A flange 3 is provided on the mating surface of the pipe 2, and the flange 3 has second threaded holes circumferentially formed with corresponding first threaded holes of equal diameter. The structure also includes a split flange 4, a fixing steel 5, an arc portion 6, a primary threaded hole 7, a secondary threaded hole 8, a fixing bolt 9, a long screw 10, a first adjusting nut 11, and a second adjusting nut 12.

[0030] The split flange 4 is fitted with the rubber expansion joint 1, and the split flange 4 is provided with a third threaded hole that corresponds one-to-one with the first threaded hole and has the same diameter.

[0031] Several sets of fixing steel 5 each have an arc-shaped portion 6 that fits against the outer wall of the pipe 2, and the length of the fixing steel 5 is greater than the distance between the outer edge of the flange 3 and the inner hole. Each set of fixing steel 5 includes two fixing steel 5 that are in the same vertical direction and are directly opposite each other (specifically, at least two sets of fixing steel 5 are installed on the flange 3).

[0032] The primary threaded hole 7 is located at the end of the fixed steel 5 furthest from the flange 3;

[0033] Two secondary threaded holes 8, symmetrically distributed about the primary threaded holes 7, are opened on the fixed steel 5 and correspond one-to-one with the secondary threaded holes and have the same diameter;

[0034] The fixing bolt 9 passes through the third threaded hole, the first threaded hole, the second threaded hole and the secondary threaded hole 8 in sequence to lock the position of the split flange 4 and the fixing steel 5;

[0035] The two ends of the long screw 10 pass through two primary threaded holes 7 on a set of fixing steel 5 respectively;

[0036] The first adjusting nut 11 and the second adjusting nut 12 are respectively threaded to the long screw 10 and located on both sides of the fixed steel 5 (specifically, there are two first adjusting nuts 11 and two second adjusting nuts 12 threaded to one long screw 10).

[0037] To facilitate the installation of the auxiliary flange 3, which is opposite to the flange 3, on the rubber expansion joint 1, and to facilitate the subsequent removal and replacement of the auxiliary flange 3 after the rubber expansion joint 1 is damaged, the above embodiment is further refined. The outer side of the split flange 4 is flush with the flange 101, and the inner side of the split flange 4 is in contact with the rubber expansion joint 1. Symmetrically distributed semi-circular holes are opened on the two flanges 3 of the split flange 4, and the two semi-circular holes can form a third threaded hole.

[0038] In order to ensure that the limiting bearing capacity of the rubber expansion joint 1 meets the requirements of various state changes of the outlet pipe 2 of the rotating equipment, the above embodiment is further optimized by making the diameter of the primary threaded hole 7 smaller than the diameter of the secondary threaded hole 8.

[0039] The working process of this utility model is as follows:

[0040] First, the two-part split flange 4 is used to install the rubber expansion joint 1 at both ends in sequence. This avoids the difficulty of flange installation caused by the flange 101. At the same time, the two are easy to separate when the rubber expansion joint 1 needs to be replaced later.

[0041] After the split flange 4 is assembled, align the second threaded hole on the flange 3, the third threaded hole on the split flange 4, and the first threaded hole on the flange 101 one by one. Then, pass the fixing bolt 9 through the third threaded hole, the first threaded hole, and the second threaded hole in sequence to achieve accurate connection of the split flange 4, the rubber expansion joint 1, and the flange 3. Then, align the secondary threaded holes 8 on the multiple sets of fixing steel 5 with the second threaded holes to ensure that the fixing bolt 9 can also pass through the fixing steel 5 smoothly. Finally, lock the split flange 4 and limit the position of the fixing steel 5 by using the nut.

[0042] After the installation of several fixing bolts 9 on both sides of the rubber expansion joint 1 is completed in sequence, the two ends of the long screw 10 are respectively passed through the two primary threaded holes 7 on a set of fixing steel 5. By adjusting the positions of the first adjusting nut 11 and the second adjusting nut 12, the fixing steel 5 and the surface of the flange 3 can be tightly pressed together.

[0043] This application configures multiple sets of fixing steel 5 on the pipe flanges 3 on both sides of the rubber expansion joint 1, and each set of fixing steel 5 cooperates with multiple sets of fixing bolts 9 to achieve position locking, thereby increasing the stress points and avoiding leakage caused by uneven stress on a single set of bolts. At the same time, the long screw 10 acts as a double-limiting expansion joint. When the rubber expansion joint 1 extends outward due to dynamic pressure, the outer nut limits the expansion amount, and when compressed, the inner nut acts as a compression limit, thereby ensuring the safety of the expansion joint when the condition of the outlet pipe 2 of the rotating equipment changes rapidly. The use of fixing steel 5 gives the outlet pipe 2 of the rotating equipment a large load-bearing capacity when the condition changes.

[0044] At the same time, when the curved part 6 on the fixed steel 5 fits into the pipe 2, the expansion and contraction dynamic pressure generated by the subsequent rotating equipment on the rubber expansion joint 1 can be transmitted to the pipe 2, avoiding the phenomenon of excessive force on a single object, thereby extending the service life of the rubber expansion joint 1. In addition, the contact area between the fixed steel 5 and the flange 3 is further expanded, resulting in a more secure limiting effect. Under the dual action of the fixing bolt 9 and the long screw 10, the fixed steel 5 will not shift its position, thus improving safety and stability.

[0045] 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 descriptions of the above embodiments and specifications are merely illustrative of the principles of this 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 protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A limiting structure for an expansion joint of a rotating equipment outlet pipe, comprising a rubber expansion joint (1) and a pipe (2), wherein the rubber expansion joint (1) has a flange (101) formed thereon and a plurality of first threaded holes are provided on the circumference of the flange (101), and a flange (3) is provided on the mating surface of the pipe (2), wherein the flange (3) has second threaded holes on its circumference that correspond one-to-one with the first threaded holes and have the same diameter, characterized in that, It also includes a split flange (4), a fixing steel (5), a curved section (6), a primary threaded hole (7), a secondary threaded hole (8), a fixing bolt (9), a long screw (10), a first adjusting nut (11), and a second adjusting nut (12). The split flange (4) is matched with the rubber expansion joint (1), and the split flange (4) is provided with a third threaded hole that corresponds one-to-one with the first threaded hole and has the same diameter; Several sets of fixed steel (5) each have an arc-shaped part (6) that fits against the outer wall of the pipe (2), and the length of the fixed steel (5) is greater than the distance between the outer edge of the flange (3) and the inner hole. Each set of fixed steel (5) includes two fixed steel (5) that are in the same vertical direction and are opposite to each other. The primary threaded hole (7) is located at the end of the fixed steel (5) away from the flange (3); Two secondary threaded holes (8) are symmetrically distributed about the primary threaded hole (7) and are opened on the fixed steel (5) and correspond one-to-one with the secondary threaded hole and have the same diameter; The fixing bolts (9) pass through the third threaded hole, the first threaded hole, the second threaded hole and the secondary threaded hole (8) in sequence to lock the position of the split flange (4) and the fixing steel (5); The two ends of the long screw (10) pass through two primary threaded holes (7) on a set of fixing steel (5); The first adjusting nut (11) and the second adjusting nut (12) are threadedly connected to the long screw (10) and are located on both sides of the fixed steel (5).

2. The expansion joint limiting structure for the outlet pipe of a rotating equipment according to claim 1, characterized in that, The outer side of the split flange (4) is flush with the flange (101), and the inner side of the split flange (4) is in contact with the rubber expansion joint (1).

3. The expansion joint limiting structure for the outlet pipe of a rotating equipment according to claim 1, characterized in that, The two flanges (3) of the split flange (4) are respectively provided with symmetrically distributed semi-circular holes, and the two semi-circular holes can form a third threaded hole.

4. The expansion joint limiting structure for the outlet pipe of a rotating equipment according to claim 1, characterized in that, At least two sets of fixing steel (5) are installed on the flange (3).

5. The expansion joint limiting structure for the outlet pipe of a rotating equipment according to claim 1, characterized in that, The diameter of the primary threaded hole (7) is smaller than the diameter of the secondary threaded hole (8).

6. The expansion joint limiting structure for the outlet pipe of a rotating equipment according to claim 1, characterized in that, Two first adjusting nuts (11) and two second adjusting nuts (12) are threaded onto one of the long screws (10).

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