Swing mechanism and constant-force spring support hanger

Abstract

The utility model discloses a rotary mechanism and a constant-force spring support hanger in the technical field of support hangers. The rotary mechanism comprises a rotary frame, a main shaft; an adjusting assembly; a pull rod; the rotating shaft comprises a rotating part, two supporting parts and a reinforcing part; two fastening nuts; a suspender; and a connecting piece. The reinforcing part corresponding to the threaded hole is arranged on the rotating part, so that acting force borne by the interior of the threaded hole is dispersed, stress concentration is reduced, the structural strength and the bearing capacity are improved, deformation or fracture is avoided, fatigue cracks are reduced, the service life is prolonged, and the service life is prolonged. And the two fastening nuts are arranged, so that stable connection is guaranteed, and the situation that the hanging rod is loosened due to impact, vibration and the like is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of supports and hangers, in particular to a slewing mechanism and a constant force spring support and hanger. Background Technique

[0002] As an important device for pipeline support, the constant force spring support and hanger is widely used in the steam-water pipelines of thermal power plants, the main body of power station boilers, and various pipelines in industries such as petroleum and chemical industry. Its standardized production in China has a history of several decades. The national standard constant force spring support and hanger is designed based on the principle of moment balance. Although the direction of the spring axis will change slightly during the working process, and there is a certain horizontal swing at the end of the load-bearing suspension rod during the operation of the spring, compared with the four-link constant force spring support and hanger and the main-auxiliary spring type constant force support and hanger abroad, it still has great advantages in terms of cost and price.

[0003] The existing constant force spring support and hanger includes a fixed frame, a slewing mechanism and a constant force mechanism; among them, for the convenience of installation and maintenance, the suspension rod in the slewing mechanism directly penetrates and is threadedly connected to the rotating shaft, so during actual use, it is convenient for assembly and disassembly.

[0004] However, the connection between the above-mentioned suspension rod and the rotating shaft is not stable. During actual use, the area around the threaded hole on the rotating shaft will become the area of stress concentration, so that the rotating shaft is prone to deformation or fracture when bearing heavy loads or impact loads, resulting in damage to the device. Content of the Utility Model

[0005] The purpose of the utility model is to provide a slewing mechanism and a constant force spring support and hanger, which solve the technical problem that the connection between the suspension rod and the rotating shaft in the prior art cannot take into account both convenient disassembly and stable connection.

[0006] In the first aspect, the utility model discloses a slewing mechanism, including:

[0007] A slewing frame;

[0008] A main shaft arranged inside the slewing frame and passing through both ends of the slewing frame;

[0009] An adjusting assembly installed inside the slewing frame for adjusting the load;

[0010] A pull rod, one end of which is rotatably connected to the adjusting assembly;

[0011] A rotating shaft arranged inside the slewing frame and located on the side of the main shaft away from the adjusting assembly. The rotating shaft includes

[0012] A rotating part, on the outer peripheral surface of which a threaded hole is radially opened,

[0013] Two supporting parts, which are of a cylindrical structure and are coaxially arranged on both sides of the rotating part,

[0014] A reinforcing part, fixedly connected to the rotating part and corresponding to the threaded hole;

[0015] Two fastening nuts, arranged on one side of the threaded hole away from the reinforcing part;

[0016] A suspension rod, one end of which passes through and is threadedly connected to the reinforcing part, the threaded hole and the fastening nuts;

[0017] A connecting piece, arranged at the other end of the suspension rod.

[0018] In this application, by providing a reinforcing part corresponding to the threaded hole on the rotating part, the acting force inside the threaded hole is dispersed, the stress concentration is reduced, the structural strength and load-bearing capacity are improved, deformation or fracture is avoided, and the generation of fatigue cracks is reduced, thereby prolonging the service life. Then, by providing two fastening nuts, the connection is ensured to be stable, and the situation that the suspension rod becomes loose due to impacts, vibrations, etc. is avoided.

[0019] On the basis of the above technical solution, the solution of this application can be further improved as follows:

[0020] Preferably, the cross-section of the rotating part is in the shape of a superior arc bow, for forming an installation plane parallel to the axis on the outer periphery; the threaded hole is opened at the center of the installation plane, and the reinforcing part is fixedly connected to the installation plane; adopting this solution, the stress concentration is reduced, and the structural strength and stability are improved.

[0021] Preferably, the rotating part and the supporting part are coaxially arranged, and the diameter of the rotating part is larger than the diameter of the supporting part; adopting this solution, the stress concentration is reduced, the structural strength and load-bearing capacity are improved, and axial limit can be performed on the rotating part, ensuring the connection is stable.

[0022] Preferably, avoidance grooves are provided on both sides of the rotating part, for reducing the contact area with the inner side of the slewing frame; adopting this solution, the contact friction force is reduced, and the rotation smoothness of the rotating shaft is improved.

[0023] Preferably, a sliding bearing is sleeved outside the supporting part, and the sliding bearing is embedded in the slewing frame; adopting this solution, the friction coefficient during its movement is reduced, thereby reducing noise and ensuring its slewing accuracy.

[0024] Preferably, the slewing frame includes:

[0025] Two side plates, arranged relatively and at intervals;

[0026] Two support plates are provided between the two side plates and are respectively located on both sides of the main shaft; with this solution, the stability of the structure can be enhanced, deformation can be prevented when it is subjected to external forces, and the load can be dispersed, improving the load-bearing capacity of the overall structure.

[0027] Preferably, a limiting sliding groove is formed on the inner side of the side plate, and the adjusting assembly includes:

[0028] An adjusting nut;

[0029] A connecting plate is provided on the end faces of the two side plates;

[0030] A U-shaped lifting lug is arranged between the two side plates;

[0031] A stud, one end of which is threadedly connected to the adjusting nut, and the other end passes through the connecting plate and is fixedly connected to the U-shaped lifting lug;

[0032] A limiting shaft is arranged in the U-shaped lifting lug, and both ends pass through the U-shaped lifting lug and are slidably limited in the adjacent limiting sliding grooves;

[0033] Wherein, one end of the pull rod extends into the U-shaped lifting lug and is rotatably sleeved on the limiting shaft; with this solution, the load can be adjusted stably and smoothly, the structure is simple and compact, the installation and arrangement are firm, and the actual use effect is good.

[0034] Preferably, the side plate has a support area in a sharp-corner shape, and the end of the support area is in an arc shape and is coaxially arranged with the rotating shaft; with this solution, it can resist forces and deformations in various directions, significantly enhance stability, and more effectively disperse and bear loads, thereby reducing the risk of local stress and deformation, and less material is required, thus reducing the manufacturing cost and weight, and can also improve the stiffness and load-bearing capacity of the entire structure, enabling it to maintain excellent performance under various extreme working conditions.

[0035] In a second aspect, the present utility model discloses a constant force spring hanger, including: the above-mentioned slewing mechanism.

[0036] Through the above technical solutions, the present utility model achieves the following beneficial effects:

[0037] 1. In this application, by providing a reinforcement part corresponding to the threaded hole on the rotating part, the acting force inside the threaded hole is dispersed, stress concentration is reduced, the structural strength and load-bearing capacity are improved, deformation or fracture is avoided, and the generation of fatigue cracks is reduced, thereby extending the service life. Then, by providing two fastening nuts, the connection is ensured to be firm, and the loosening of the suspension rod due to impacts, vibrations, etc. is avoided.

[0038] 2. By making the cross-section of the rotating part in the shape of a superior arc bow and arranging the threaded hole at the center of the mounting plane, the present application ensures the balance of forces at both ends, improves the load-bearing capacity, and then fixedly connects the reinforcement part to the mounting plane, thereby reducing stress concentration and enhancing the structural strength and stability. Description of the Drawings

[0039] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 Structural schematic diagram of the slewing mechanism according to a specific embodiment of the present invention;

[0041] Figure 2 For Figure 1 Internal structural schematic diagram of the slewing mechanism shown;

[0042] Figure 3 For Figure 1 Structural schematic diagram of the slewing mechanism from another perspective shown;

[0043] Figure 4 For Figure 1 Installation schematic diagram of the suspension rod in the slewing mechanism shown;

[0044] Figure 5 For Figure 1 Structural schematic diagram of the rotating shaft in the slewing mechanism shown;

[0045] Figure 6 For Figure 1 Installation schematic diagram of the slewing mechanism shown;

[0046] Explanation of the reference numerals in the drawings:

[0047] 1, slewing frame; 2, main shaft; 3, adjusting assembly; 4, tie rod; 5, rotating shaft; 6, fastening nut; 7, suspension rod; 8, connecting piece; 9, sliding bearing;

[0048] 11, side plate; 12, support plate; 31, adjusting nut; 32, connecting plate; 33, U-shaped lifting lug; 34, stud; 51, rotating part; 52, supporting part; 53, reinforcing part;

[0049] 111, limiting chute; 112, supporting area; 511, threaded hole; 512, mounting plane; 513, avoiding slot. Detailed Description of the Embodiments

[0050] The embodiments of the technical solution of the present utility model will be described in detail below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, so they are only examples and cannot be used to limit the protection scope of the present utility model.

[0051] First of all, it should be noted that some orientation words involved in the following description to clearly illustrate the technical solution of the present utility model, such as the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are all the meanings analogized according to the normal orientation of the components in the slewing mechanism and the constant force spring hanger. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model.

[0052] In this application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be fixedly connected, detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0053] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the specification drawings and specific implementation manners.

[0054] Embodiment:

[0055] As Figure 2 shown, the embodiment of the present application discloses a slewing mechanism, which is used to be installed in a fixed frame in a constant force spring hanger, connect a constant force mechanism and a pipeline, and can perform reciprocating slewing. Its specific structure includes: a slewing frame 1, a main shaft 2, an adjusting assembly 3, a pull rod 4, a rotating shaft 5, two fastening nuts 6, a suspension rod 7 and a connecting piece 8.

[0056] The slewing frame 1 is arranged in the fixed frame as Figure 6 shown.

[0057] The main shaft 2 is arranged in the slewing frame 1 and passes through both ends of the slewing frame 1, and is used to realize the rotational connection between the slewing frame 1 and the fixed frame.

[0058] The adjusting assembly 3 is installed in the slewing frame 1 and is used to adjust the load.

[0059] One end of the pull rod 4 is rotatably connected to the adjusting assembly 3, and the other end is connected to the constant force mechanism.

[0060] The rotating shaft 5 is arranged within the rotating frame 1 and is located on the side of the main shaft 2 away from the adjusting assembly 3.

[0061] Specifically, the rotating shaft 5 includes: a rotating portion 51, two supporting portions 52, and a reinforcing portion 53; among them, threaded holes 511 are radially formed on the outer peripheral surface of the rotating portion 51, the two supporting portions 52 are of cylindrical structure and are coaxially arranged on both sides of the rotating portion 51, the reinforcing portion 53 is fixedly connected to the rotating portion 51 and corresponds to the threaded holes 511, and it is preferably welded to improve the connection stability.

[0062] Two fastening nuts 6 are arranged on the side of the threaded holes 511 away from the reinforcing portion 53.

[0063] One end of the suspension rod 7 passes through and is threadedly connected to the reinforcing portion 53, the threaded holes 511, and the fastening nuts 6.

[0064] The connecting member 8 is provided at the other end of the suspension rod 7 for connecting the pipeline.

[0065] In this application, by providing the reinforcing portion 53 corresponding to the threaded holes 511 on the rotating portion 51, the force received inside the threaded holes 511 is dispersed, stress concentration is reduced, the structural strength and load-bearing capacity are improved, deformation or fracture is avoided, and the generation of fatigue cracks is reduced, thereby extending the service life. Then, by providing two fastening nuts 6, the connection stability is ensured, and the situation of the suspension rod 7 becoming loose due to impacts, vibrations, etc. is avoided.

[0066] In some embodiments, as Figure 5 shown, the cross-section of the rotating portion 51 is in the shape of a superior arc bow for forming an installation plane 512 parallel to the axis on the outer periphery; the threaded holes 511 are opened at the center of the installation plane 512, ensuring the balance of forces at both ends, improving the load-bearing capacity, and the reinforcing portion 53 is fixedly connected to the installation plane 512; thereby reducing stress concentration and improving the structural strength and stability.

[0067] Specifically, the reinforcing portion 53 is of cylindrical structure, and one end surface is in contact with and fixedly connected to the installation plane 512 for increasing the contact area and improving the connection stability.

[0068] In some embodiments, as Figure 4 and Figure 5 shown, the rotating portion 51 and the supporting portion 52 are coaxially arranged, and the diameter of the rotating portion 51 is larger than the diameter of the supporting portion 52.

[0069] Through the above settings, stress concentration is reduced, the structural strength and load-bearing capacity are improved, and axial limit can be applied to the rotating portion 51, ensuring the connection stability.

[0070] In some embodiments, as Figure 5As shown, avoidance grooves 513 are provided on both sides of the rotating part 51 to reduce the contact area with the inner side of the slewing frame 1, thereby reducing the friction force between the two and improving the rotation smoothness of the rotating shaft 5.

[0071] Specifically, the avoidance groove 513 has a fan-shaped ring structure and is coaxially arranged with the support part 52, which reduces stress concentration and improves structural stability.

[0072] In some embodiments, as Figure 4 shown, a sliding bearing 9 is sleeved outside the support part 52, and the sliding bearing 9 is embedded in the slewing frame 1. It is used to support the rotating body and reduce the friction coefficient during its movement, thereby reducing noise, improving rotation smoothness, and ensuring its slewing accuracy.

[0073] In some embodiments, as Figures 1 to 3 shown, the slewing frame 1 includes: two side plates 11 and two support plates 12; wherein, the two side plates 11 are arranged relatively spaced apart, and the two support plates 12 are arranged between the two side plates 11 and are respectively located on both sides of the main shaft 2.

[0074] By supporting at both ends through the two support plates 12, the structural stability can be enhanced, preventing the slewing frame 1 from deforming when subjected to external forces, and dispersing the load, thereby improving the load-bearing capacity of the overall structure.

[0075] In some embodiments, as Figure 1 and Figure 3 shown, a limiting sliding groove 111 is provided on the inner side of the side plate 11. The adjusting assembly 3 includes: an adjusting nut 31, a connecting plate 32, a U-shaped lifting lug 33, a stud 34, and a limiting shaft 35. Among them, the connecting plate 32 is arranged on the end faces of the two side plates 11; the U-shaped lifting lug 33 is arranged between the two side plates 11; one end of the stud 34 is threadedly connected to the adjusting nut 31, and the other end passes through the connecting plate 32 and is fixedly connected to the U-shaped lifting lug 33; the limiting shaft 35 is arranged in the U-shaped lifting lug 33, and both ends pass through the U-shaped lifting lug 33 and are slidably limited in the adjacent limiting sliding groove 111; in addition, one end of the pull rod 4 extends into the U-shaped lifting lug 33 and is rotatably sleeved on the limiting shaft 35.

[0076] During adjustment, the U-shaped lifting lug 33 can move along the corresponding limiting sliding groove 111 through the limiting shafts 35 on both sides. By tightening or loosening the adjusting nut 31 and the stud 34, the U-shaped lifting lug 33 can be driven to perform the above movement, thereby adjusting the rotation position of the pull rod 4 and playing a role in adjusting the load.

[0077] Through the above settings, the load can be adjusted stably and smoothly. Its structure is simple and compact, the installation layout is firm, and the actual use effect is good.

[0078] On the basis of the above embodiments, as Figure 3As shown, the side plate 11 has a support area 112 in a sharp-corner shape, and the end of the support area 112 is in an arc shape and is coaxially arranged with the rotating shaft 5. It can resist forces and deformations in various directions, significantly enhance stability, and more effectively disperse and bear loads, thereby reducing the risk of local stress and deformation, requiring less material, thus reducing manufacturing costs and weight, and can also improve the stiffness and load-bearing capacity of the entire structure, enabling it to maintain excellent performance under various extreme working conditions.

[0079] This embodiment also discloses a constant force spring hanger including the above-mentioned slewing mechanism.

[0080] In the description of the present utility model, a large number of specific details are illustrated. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0081] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0082] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model, and they should all be covered by the scope of the claims and the specification of the present utility model.

Claims

1. A slewing mechanism, characterized in that, Comprising: Rotary frame; Main shaft, arranged within the rotary frame and passing through both ends of the rotary frame; Adjusting assembly, installed within the rotary frame for adjusting the load; Tie rod, one end of which is rotatably connected to the adjusting assembly; Rotating shaft, arranged within the rotary frame and located on the side of the main shaft away from the adjusting assembly, the rotating shaft includes Rotating part, on the outer peripheral surface of which a threaded hole is radially opened; Two supporting parts, having a cylindrical structure and coaxially arranged on both sides of the rotating part; Reinforcing part, fixedly connected to the rotating part and corresponding to the threaded hole; Two fastening nuts, arranged on the side of the threaded hole away from the reinforcing part; Suspension rod, one end of which passes through and is threadedly connected to the reinforcing part, the threaded hole and the fastening nut; Connecting piece, provided at the other end of the suspension rod.

2. The slewing mechanism according to claim 1, wherein The cross-section of the rotating part is in the shape of a superior arc bow, for forming an installation plane parallel to the axis on the outer periphery; the threaded hole is opened at the center of the installation plane, and the reinforcing part is fixedly connected to the installation plane.

3. The slewing mechanism according to claim 1, wherein, The rotating part and the supporting part are coaxially arranged, and the diameter of the rotating part is larger than that of the supporting part.

4. The slewing mechanism according to claim 3, characterized in that, Avoidance grooves are opened on both sides of the rotating part for reducing the contact area with the inner side of the rotary frame.

5. The slewing mechanism according to claim 1, wherein A sliding bearing is sleeved outside the supporting part, and the sliding bearing is embedded within the rotary frame.

6. The slewing mechanism according to claim 1, characterized in that, The rotary frame includes: Two side plates, arranged relatively at intervals; Two support plates, arranged between the two side plates and respectively located on both sides of the main shaft.

7. The slewing mechanism according to claim 6, characterized in that, Limit sliding grooves are opened on the inner side of the side plate, and the adjusting assembly includes: Adjusting nut; Connecting plate, arranged on the end faces of the two side plates; U-shaped lifting lug, arranged between the two side plates; Stud, one end of which is threadedly connected to the adjusting nut, and the other end passes through the connecting plate and is fixedly connected to the U-shaped lifting lug; Limit shaft, arranged within the U-shaped lifting lug, and after passing through both ends of the U-shaped lifting lug, it is slidably limited within the adjacent limit sliding grooves; Wherein, one end of the tie rod extends into the U-shaped lifting lug and is rotatably sleeved on the limit shaft.

8. The slewing mechanism according to claim 6, characterized in that, The side plate has a support area in the shape of a sharp angle, and the end of the support area is in an arc shape and is coaxially arranged with the rotating shaft.

9. A constant force spring hanger, characterized in that, Comprising the rotary mechanism according to any one of claims 1 to 8.

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