Pipe vibration damping clamp

Abstract

A pipeline vibration damping clamp comprises: a clamp unit, the clamp unit can form a pipeline vibration damping clamp that embraces the pipeline, the clamp unit comprises a clamp body, a groove structure is arranged on the clamp body, a plurality of metal rubber blocks are arranged in the groove structure, the molding direction of the metal rubber block is consistent with the force direction of the metal rubber block after tooling, and the molding direction of the metal rubber block is perpendicular to the upper and lower bottom surfaces of the metal rubber block. In the present invention, the density and preload parameters of the metal rubber block are designed in a coordinated manner, so that the metal rubber block can obtain the minimum stiffness under the same pressure condition, thereby improving the vibration damping effect of the metal rubber block; the contact surface between the metal rubber block and the pipeline is completely close, and its lower bottom surface is in contact with the internal groove of the clamp as much as possible, so that the metal rubber part is subjected to more uniform force, and the molding method of the metal rubber block can simultaneously increase the bearing capacity and damping vibration reduction effect of the metal rubber block.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline vibration reduction related equipment, and more specifically, particularly to a pipeline vibration reduction clamp. Background Art

[0002] The pipeline system is an indispensable liquid or gas circulation system in ships, nuclear power and other equipment. During its service, it will inevitably be subjected to external impacts and cause strong vibrations in the pipeline, which will affect the stability of material transportation and precision instruments and equipment in the pipeline system, causing the pipeline system to fail at the least, or causing the hull to explode, leading to more serious accidents, and even destroying the ship and killing people. Although the pipeline system plays a vital role in ships, the transmission of water, oil, gas, etc. in ships is carried out normally through the pipeline system, but because the pipeline system is extremely susceptible to impact vibration, the vibration problem of the pipeline system in ships should be highly valued.

[0003] At present, the most concerned issues for pipeline shock absorbers used in various ships are the shock absorption effect and fatigue life of the shock absorbers. In the prior art, in pipe clamps with ordinary metal rubber blocks, since the force direction of the metal rubber block is in the non-molding direction, or the contact area between the metal rubber block and the pipeline or pipe clamp groove is small, the bearing capacity of the metal rubber is low, which will reduce its service life. For some working conditions with higher load requirements, the density or preload of the metal rubber is usually designed to be larger, but this will lead to a decrease in the vibration reduction effect of the metal rubber. Summary of the invention

[0004] 1. Technical issues

[0005] Therefore, how to improve the load-bearing capacity and obtain better vibration reduction effect is an important problem that needs to be solved urgently in the design of metal rubber.

[0006] (2) Technical solution

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides a pipeline vibration-damping clamp. In the present invention, the pipeline vibration-damping clamp comprises:

[0009] At least two clamp units, all of which can form a pipeline vibration-damping clamp that surrounds the pipeline;

[0010] The clamp unit includes a clamp body, a groove structure is arranged on the clamp body, a plurality of metal rubber blocks are arranged in the groove structure, the upper bottom surface of the metal rubber block abuts against the pipeline surface, and the lower bottom surface of the metal rubber block abuts against the inner bottom surface of the groove structure;

[0011] The molding direction of the metal rubber block is consistent with the force direction of the metal rubber block after tooling, and the molding direction of the metal rubber block is a direction perpendicular to the upper and lower bottom surfaces of the metal rubber block.

[0012] Preferably, in the pipeline vibration damping clamp provided by the present invention:

[0013] The metal rubber block includes a trapezoidal structure part and a rectangular structure part, the trapezoidal structure part has the upper bottom surface, and the rectangular structure part has a lower bottom surface;

[0014] The metal rubber blocks are arranged in sequence and evenly distributed in the groove structure. In the same clamp unit, the trapezoidal structural parts of adjacent metal rubber blocks are abutted against each other, and the rectangular structural parts are evenly spaced.

[0015] Preferably, in the pipeline vibration damping clamp provided by the present invention:

[0016] The clamp body is provided with limiting bolts, which are arranged at both ends of the groove structure and are used for limiting and fixing the metal rubber block arranged in the groove structure;

[0017] A positioning bolt is arranged on the clamp body, and the positioning bolt can pass through two adjacent clamp bodies in sequence to fix and connect the two adjacent clamp bodies.

[0018] Preferably, in the pipeline vibration damping clamp provided by the present invention:

[0019] A flat washer, a spring washer and a nut are used in conjunction with the limit bolt;

[0020] A flat washer, a spring washer and a nut are used in conjunction with the positioning bolt.

[0021] Preferably, in the pipeline vibration damping clamp provided by the present invention:

[0022] The pre-tightening amount of the metal rubber block on the pipeline is related to the density of the metal rubber block;

[0023] The matching method of the pre-tightening amount of the metal rubber block on the pipeline and the density of the metal rubber block is as follows:

[0024] Step S1, according to the preset density ρ of the metal rubber block, the long side L1 of the bottom surface of the metal rubber block, the width W, the total height H of the metal rubber block and the volume of the trapezoidal structure of the metal rubber block ,high , determine the weight of the metal rubber block as =ρ×[ +L1×W×(H- )];

[0025] Step S2, according to the radius R of the groove structure on the clamp body, the pipe diameter D and the preset preload A of the metal rubber block, determine the height H=A+(RD / 2) of the metal rubber block, where the radius R, the pipe diameter D and the preload A are in units of mm before being substituted into the formula;

[0026] Step S3, the central angle θ1 corresponding to the metal rubber block in the clamp unit, the long side L2 of the upper bottom surface of the metal rubber block and the outer diameter D of the pipeline, the force area S of the metal rubber block = ;

[0027] Step S4, the load on the metal rubber block is F, and according to the load F and the force-bearing area S obtained in step S3, the average pressure P=F / S generated when the metal rubber block is subjected to force is determined;

[0028] Step S5: The density of the metal rubber block is in the range of 1.5 to 3.0 g / cm 3 , the preload value range is 0.1~5.5mm,

[0029] Preferably, in the pipeline vibration damping clamp provided by the present invention:

[0030] The density and preload matching parameters of the metal rubber block are: when P≥2N / mm 2 When the density is 1.789g / cm 3 , preload 3.7mm; when P<2N / mm 2 When the density is 2.932g / cm 3 , preload amount is 0.45mm.

[0031] Preferably, in the pipeline vibration damping clamp provided by the present invention:

[0032] In the step S1 , the long side L1 of the bottom surface of the metal rubber block is fixed at 47.6 mm, and the width W is fixed at 10.1 mm.

[0033] Preferably, in the pipeline vibration damping clamp provided by the present invention:

[0034] In step S1, the volume of the trapezoidal structure of the metal rubber block is Fixed value 4061.83mm 3 ,high The fixed value is 11.01mm.

[0035] Preferably, in the pipeline vibration damping clamp provided by the present invention:

[0036] In step S2, the preload amount A is changed only by changing the height of the rectangular structure portion of the metal rubber block, and the height of the rectangular structure portion of the metal rubber block is H- ,in Is a fixed value.

[0037] Preferably, in the pipeline vibration damping clamp provided by the present invention:

[0038] In step S1 and step S2, the mass of the metal rubber block is =ρ×(0.48076H–1.2332);

[0039] Where: The unit before substitution is g, and the unit before substitution is g / cm 3 , the unit of H before substitution into the formula is mm.

[0040] Preferably, in the pipeline vibration damping clamp provided by the present invention:

[0041] In the step S3, the central angle θ1 corresponding to the metal rubber block provided in the clamp unit changes with the diameter of the pipeline;

[0042] When the diameter of the pipeline is the same, the central angle θ1 remains unchanged.

[0043] (III) Beneficial effects.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] As can be seen from the above, the present invention provides a pipeline vibration damping clamp, which includes: at least two clamp units (preferably two), all of which can form a pipeline vibration damping clamp that embraces the pipeline (when there are two, the two clamp units are arranged up and down and fixedly connected by positioning bolts). Specifically, the clamp unit includes a clamp body (an integrated metal structural part), a groove structure (an arc-shaped groove structure) is arranged on the clamp body, and a plurality of metal rubber blocks are arranged in the groove structure (the metal rubber block has a trapezoidal structure part and a rectangular structure part), the upper bottom surface of the metal rubber block is against the pipeline surface, and the lower bottom surface of the metal rubber block is against the inner bottom surface of the groove structure. The present invention specifically defines the structure of the metal rubber block: the molding direction of the metal rubber block is consistent with the force direction of the metal rubber block after the tooling, and the molding direction of the metal rubber block is perpendicular to the upper and lower bottom surfaces of the metal rubber block. Through the above structural design, the pipeline vibration damping clamp provided by the present invention includes at least the following beneficial effects compared with the prior art:

[0046] 1. The density and preload parameters of the metal rubber block are designed in coordination, so that the metal rubber block can obtain the minimum stiffness under the same pressure condition, thereby improving the vibration reduction effect of the metal rubber block. In addition, setting the preload can also appropriately increase the service life of the metal rubber block;

[0047] 2. The contact surface between the metal rubber block and the pipeline can be completely close (that is, the upper bottom surface of the metal rubber block is completely and tightly fitted with the pipeline surface), and the lower bottom surface of the metal rubber block can be in contact with the internal groove of the clamp as much as possible (the lower bottom surface of the metal rubber block is completely and tightly fitted with the internal bottom surface of the groove structure on the clamp body), so that the metal rubber part is more evenly stressed. The metal rubber block is provided with a trapezoidal structure part and a rectangular structure part. When the trapezoidal structure part surrounds the pipeline and contacts the pipeline surface, due to its trapezoidal structure design, the contact surface of the metal rubber block with the pipeline (the upper bottom surface contacts the force-bearing surface) can be completely against the pipeline and there is no gap between the metal rubber blocks, which can improve the vibration reduction effect. At the same time, the metal rubber block has a rectangular structure part that can maintain a small gap (the gap between the rectangular structure parts in adjacent metal rubber blocks) and offset the groove structure on the clamp body (the lower bottom surface of the metal rubber block contacts the supporting surface). The above design can increase the contact surface area between the metal rubber block and the force-bearing surface and the supporting surface. The increased contact area can reduce the pressure on the upper and lower bottom surfaces of the metal rubber block, thereby improving its bearing capacity. In addition, the rectangular structure design effectively avoids the problem that conventional trapezoidal parts cannot be installed in the groove of the pipe clamp.

[0048] 3. The molding method of the metal rubber block can simultaneously increase the bearing capacity and damping vibration reduction effect of the metal rubber block. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0050] Figure 1 A model diagram of a pipeline vibration-damping clamp in an embodiment of the present invention;

[0051] Figure 2 Schematic diagram of the relationship between the molding direction and the force direction of the metal rubber block in the pipeline vibration damping clamp in the embodiment of the present invention;

[0052] Figure 3 Schematic diagram of the structure of the pipeline vibration damping clamp in the embodiment of the present invention;

[0053] Figure 4 Based on Figure 3 A-direction view;

[0054] Figure 5 Based on Figure 3 B-direction view;

[0055] Figure 6 It is a cross-sectional view of the pipeline vibration damping clamp along the pipeline direction in the embodiment of the present invention;

[0056] Figure 7 It is a cross-sectional view of the pipeline vibration-damping clamp along the axial direction of the pipeline in an embodiment of the present invention;

[0057] Figure 8 It is a schematic diagram of the structure of the metal rubber block in an embodiment of the present invention;

[0058] Fig. 9 is a side view of a metal rubber block in an embodiment of the present invention;

[0059] Fig.10 is a top view of a metal rubber block in an embodiment of the present invention;

[0060] Fig.11 Schematic diagram of metal rubber stamping in an embodiment of the present invention;

[0061] Fig.12 This is a fitting result diagram of the relationship between the stiffness of the metal rubber block in the pipeline vibration damping clamp and the pressure change in the embodiment of the present invention.

[0062] exist Figures 1 to 11 The corresponding relationship between the component names and the reference numerals is as follows:

[0063] The clamp body 1, the metal rubber block 2, the upper bottom surface 21, the lower bottom surface 22, the trapezoidal structure part 23, the rectangular structure part 24, the limit bolt 3, the positioning bolt 4, the pipeline 5, the forming mold 6, and the forming pressing block 7. DETAILED DESCRIPTION

[0064] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. Each example is provided by way of explanation of the present invention and is not intended to limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, the present invention is shown or described as

[0065] Features that are part of one embodiment may be used on another embodiment to yield a still further embodiment. Thus, it is intended that the present invention encompass such modifications and variations as come within the scope of the appended claims and their equivalents.

[0066] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0067] Please refer to Figures 1 to 12The present invention provides a pipeline vibration damping clamp with high load-bearing and high damping characteristics. In the present invention, the pipeline vibration damping clamp includes: two clamps arranged in upper and lower positions (specifically, clamp units. In a specific embodiment of the present invention, two clamp units are arranged, and the two clamp units are arranged in upper and lower positions on the pipeline 5), multiple trapezoidal metal rubber blocks 2 (the metal rubber block 2 has a trapezoidal structure portion 23), a limit plate, a bolt, a nut and a limit hole structure. In the present invention, the number of clamp units is preferably two, and an upper and lower matching structure is adopted (specifically, when in use, the two clamp units are one in the lower position and the other in the upper position, and are clamped on the pipeline 5 and then fixed by the matching of bolts and nuts), a groove structure is arranged inside the clamp unit, and a limit plate is arranged above the left and right sides of the groove structure (the limit plate is used to close the two sides of the groove structure, so that the groove structure forms a cavity structure that allows the metal rubber block 2 to be loaded and removed in one direction). A plurality of metal rubber blocks 2 of trapezoidal structure are arranged in the groove structure of the clamp unit. The forming direction of the metal rubber block 2 is the vertical line between the upper bottom surface 21 and the lower bottom surface 22. Among the plurality of trapezoidal metal rubber blocks 2, the vertical line between the upper and lower bottom surfaces of each metal rubber block 2 is parallel to the clamp radial direction. The bottom surface (lower bottom surface 22) of the trapezoidal metal rubber block 2 is evenly distributed and arranged along the extension direction of the groove structure on the clamp unit. The clamp unit includes a clamp body 1. Four limiting holes are arranged on the left and right sides of the clamp body 1. Limiting bolts 3 are arranged between the limiting holes. The limiting bolts 3 fix the plurality of trapezoidal metal rubber blocks 2 in the groove structure. Two parallel positioning holes are arranged on each of the two side wings of the clamp. Positioning bolts 4 are arranged on the positioning holes. The positioning bolts 4 connect the upper half clamp unit and the lower half clamp unit. The positioning bolts 4 are provided with flat washers, spring washers and pre-tightening nuts. The pre-tightening nuts can adjust the pre-tightening amount of the metal rubber blocks 2 in the pipe clamp. The present invention greatly improves the bearing capacity and vibration reduction effect of the pipeline 5 hangers through the structural design of the metal rubber block 2 and the clamp and controls the molding direction of the trapezoidal metal rubber block 2. At the same time, the density of the metal rubber block 2 and the matching parameters of the preload are adjusted to achieve the minimum stiffness of the metal rubber block 2 under the same pressure to obtain the maximum damping vibration reduction effect. The present invention is highly practical and can also increase the service life of the pipeline vibration reduction clamp.

[0068] Specifically, the present invention provides a pipeline vibration damping clamp with high load-bearing and high damping characteristics, the pipeline vibration damping clamp comprises a lower clamp and an upper clamp (a complete pipeline vibration damping clamp comprises two units, namely a lower clamp unit and an upper clamp unit). The lower clamp unit has a substantially identical structure to the upper clamp unit, and the clamp unit (the lower clamp unit and the upper clamp unit) comprises a clamp body 1, a groove structure is provided on the clamp body 1 (the groove structure is an arc-shaped groove, and the center of the inner arc bottom surface of the groove structure is coaxially arranged with the axis of the pipeline 5), and a plurality of metal rubber blocks 2 of a trapezoidal structure are evenly arranged in the groove structure, and the lower bottom surface 22 of the metal rubber block 2 (which can be a plane or a curved surface adapted to the shape of the groove structure) contacts the inner bottom surface of the groove structure, and the upper bottom surface 21 (which can be a plane or a curved surface adapted to the shape of the pipe) contacts closely with the pipeline 5. A limiting bolt 3 and a positioning bolt 4 are provided on the clamp body 1. The limiting bolt 3 passes through the limiting hole (set on the clamp body 1 and passes through the clamp body 1 in a direction parallel to the axial direction of the pipeline 5) to limit and fix the multiple trapezoidal metal rubber blocks 2. The limiting bolt 3 is provided with a flat washer, a spring washer and a nut to fix the limiting bolt 3 and prevent the nut from loosening due to vibration. The positioning bolt 4 passes through the positioning holes set in the upper clamp unit and the lower clamp unit. The positioning bolt 4 is provided with a locking spring washer, a flat washer and a pre-tightening nut. The position change of the pre-tightening nut can adjust the pre-tightening amount of the trapezoidal metal rubber block 2.

[0069] The present invention sets a limit bolt 3 on the clamp body 1, and its functions are as follows: 1. During the installation process, a limit bolt 3 is first installed on the left or right side, and then a plurality of (seven) metal rubber blocks are sequentially installed along the groove structure on the clamp body 1 from the side where the limit bolt is not installed, and finally the remaining limit bolt is installed. This arrangement makes the installation operation extremely simple and convenient; 2. The limit bolt 3 is set to limit the number and position of the metal rubbers on the left and right sides of the groove structure; 3. It can ensure that the upper halves of all the metal rubber blocks in the groove structure can fit tightly with each other, so that there is no large gap between the two metal rubbers, ensuring the contact surface between the pipeline and the upper and lower surfaces of the metal rubbers.

[0070] In the present invention, seven metal rubber blocks 2 are installed in the groove structure on the clamp body 1. Figure 2It is shown in the figure that when the metal rubber block 2 is subjected to horizontal lateral force, the metal rubber blocks at the outermost left and right ends can ensure the stability of the pipeline in the horizontal direction, and can also play a major role in vibration reduction; if five metal rubber blocks are designed in half of the clamp, the width of the metal rubber block should be increased according to actual needs (but the contact surface between the lower bottom surface of the metal rubber block and the groove structure on the clamp is reduced). It should be noted that in the present invention, the number of metal rubber blocks 2 is preferably seven. If the number is reduced, for example, when it is designed as five metal rubber blocks, this will lead to a decrease in the contact surface area between the upper bottom surface of the metal rubber block and the pipeline, and the contact surface area between the lower bottom surface and the inner groove of the clamp. When the external force is small (the preload is also small), it cannot be guaranteed that the upper bottom surface or the lower bottom surface is completely in contact with its corresponding contact surface, and the metal rubber block cannot exert its optimal performance. In addition, when the metal rubber block 2 is designed to be 5 pieces, since the upper and lower bottom surfaces of the metal rubber block are parallel surfaces (straight), when the preload is large, or the external load (external force) is increased, the width of the metal rubber block becomes larger, resulting in a large deformation of one part of the upper bottom surface of the same metal rubber block and a small deformation of another part. This phenomenon may cause the following problems: the metal rubber block cannot fully exert its vibration reduction performance, and may damage the internal structure of the metal rubber block and reduce its service life; for the lower bottom surface, the lower bottom surface of the metal rubber block is also a straight surface, while the bottom surface of the internal groove of the clamp is an arc. The larger the width of the lower bottom surface of the metal rubber block, the smaller the contact area between the lower bottom surface of the metal rubber block and the bottom surface of the groove, which is not conducive to the load-bearing of the metal rubber. In actual design, the smaller the width of the metal rubber block, the larger the contact area between the upper and lower bottom surfaces of all the metal rubber blocks in the groove and the corresponding contact surface, but if the width of the metal rubber block is designed to be smaller, the more metal rubber blocks are required in half of the clamp, which will increase the processing cost and time.

[0071] In this embodiment, the metal rubber block 2 is a trapezoidal block (the metal rubber block 2 is an integrated structure, and the whole includes two parts, namely a trapezoidal structure part 23 and a rectangular structure part 24). The molding direction of the metal rubber block 2 is consistent with the force direction during operation (parallel to the radial direction of the pipeline 5). The above molding direction is the vertical connection direction of the upper bottom surface 21 and the lower bottom surface 22 of the metal rubber block 2. This molding method is conducive to improving the bearing capacity and damping vibration reduction capacity of the metal rubber block 2.

[0072] It should be noted that: the forming direction of the metal rubber block 2 is consistent with the force direction during operation, which means that the forming direction of the metal rubber block 2 is parallel to the force direction during operation, but in opposite directions, or it can be understood that the force direction and the forming direction are in opposite directions.

[0073] In one embodiment of the present invention, among all the metal rubber blocks 2 arranged in the same clamp unit, the sides of the upper bottom surfaces 21 of adjacent metal rubber blocks 2 (sides parallel to the axial direction of the pipeline 5 in the installed state) are closely attached together, the upper bottom surfaces 21 of all metal rubber blocks 2 are closely attached to the pipeline 5, and there is a fixed spacing between the sides of the lower bottom surfaces 22 of adjacent metal rubber blocks 2. The contact area between the force-bearing surface (upper bottom surface 21) and the supporting surface (lower bottom surface 22) of the metal rubber block 2 and the pipeline 5 and the clamp body 1 is large, so that it is more adapted to the structure of the pipeline and improves the force uniformity of the metal rubber block 2 in the clamp.

[0074] According to one embodiment of the present invention, the density of the metal rubber block 2 is in the range of 1.5 to 3.0 g / cm 3 , for example, a typical but non-limiting density is 1.5 g / cm 3 , 1.8g / cm 3 , 2.0g / cm 3 , 2.2g / cm 3 , 2.5g / cm 3 , 2.8g / cm 3 or 3.0g / cm 3 etc.; the preload value range is: 0.1-5.5mm, for example, typical but non-limiting densities are: 0.1mm, 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 4.0mm, 4.5mm, 5.0mm or 5.5mm, etc. The pipe diameter size D applicable to the present invention ranges from: 40 to 65mm. The density and preload fit parameters of the metal rubber block 2 are preferably: when P ≥ 2N / mm 2 When the density is 1.789g / cm 3 , preload 3.7mm; when P<2N / mm 2 When the density is 2.932g / cm 3 , the preload amount is 0.45mm.

[0075] In a preferred embodiment of the present invention, the long side L1 of the bottom surface 22 of the metal rubber block 2 is fixed at 47.6 mm, and the width W is fixed at 10.1 mm. The volume of the trapezoidal structure portion 23 in the metal rubber block 2 is Fixed value 4061.83mm 3 ,high The preload amount A is fixed at 11.01 mm. In the present invention, the design of the preload amount A is achieved by only changing the height of the trapezoidal structure part 23 in the metal rubber block 2 (the metal rubber block 2 is an integral structure, which has a trapezoidal part and a rectangular part, the trapezoidal part has an upper bottom surface 21 structure for contacting the pipeline 5, and the rectangular part has a lower bottom surface 22 structure for contacting the inner side of the groove on the clamp body), that is, (H- ), no change Height. According to the preset density ρ of the trapezoidal structure part 23 of the metal rubber block 2, the long side L and width W of the bottom surface 22 of the trapezoidal structure part 23 of the metal rubber block 2, the total height H of the metal rubber block 2 and the volume of the trapezoidal structure part 23 of the metal rubber block 2 (Its height is ), determine the weight of the trapezoidal structure part 23 of the metal rubber block 2 as =ρ×[ +L1×W×(H- )].

[0076] A plurality of metal rubber blocks 2 are evenly arranged in the groove structure provided on the clamp unit, the lower bottom surface 22 of the metal rubber block 2 contacts the inner bottom surface of the groove structure, and the upper bottom surface 21 of the metal rubber block 2 contacts closely with the surface of the pipeline 5. After the limiting bolt 3 passes through the limiting hole, the plurality of metal rubber blocks 2 can be fixed in the clamp body 1. The limiting bolt 3 is provided with a flat washer, a spring washer and a nut to fix the bolt and prevent the limiting bolt 3 (or nut) from loosening due to vibration. A positioning bolt 4 is provided on the clamp body 1, and the positioning bolt 4 passes through the positioning holes provided on the upper clamp unit and the lower clamp unit. The positioning bolt 4 is provided with a locking spring washer, a flat washer and a pre-tightening nut. The position change of the pre-tightening nut can adjust the pre-tightening amount of the metal rubber block 2 (when the pre-tightening nut is tightened, the pre-tightening amount of the metal rubber block 2 increases, and when the pre-tightening nut is loosened, the pre-tightening amount of the metal rubber block 2 decreases).

[0077] As for the metal rubber block 2, the metal rubber block 2 is generally a trapezoidal block structure (with a trapezoidal structure part 23 and a rectangular structure part 24), and the molding direction (i.e., the vertical connection direction of the upper bottom surface 21 and the lower bottom surface 22) is the same as the force direction during operation (and parallel to the radial direction of the pipeline 5). This molding method is conducive to improving the bearing capacity and damping and vibration reduction capacity of the metal rubber. The metal rubber block 2 is structurally subdivided, and includes a trapezoidal structure part 23 and a rectangular structure part 24. The trapezoidal structure part 23 has an upper bottom surface 21 for abutting against the pipeline 5, and the rectangular structure part 24 has a lower bottom surface 22 for abutting against the groove set in the clamp body 1. A plurality of metal rubber blocks 2 are arranged on the same clamp body 1, and the sides of the upper bottom surfaces 21 of adjacent metal rubber blocks 2 (sides parallel to the axial direction of the pipeline 5) are closely attached together, and the upper bottom surfaces 21 of all metal rubber blocks 2 can be closely attached to the pipeline 5, and there is a fixed spacing between the sides of the lower bottom surfaces 22 of adjacent metal rubber blocks 2 (sides parallel to the axial direction of the pipeline 5), and the contact area between the force-bearing surface and the supporting surface of the metal rubber block 2 and other structures is increased, so as to better adapt to the structure of the pipeline and improve the force uniformity of the metal rubber block 2 in the clamp unit.

[0078] According to the preset density ρ of the metal rubber block 2, the long side L and width W of the lower bottom surface 22 of the metal rubber block 2, the total height H of the metal rubber block 2 and the volume of the trapezoidal structure part 23 of the metal rubber block 2 (Its height is ), determine the weight of the metal rubber block as =ρ×[ +L1×W×(H- )]. The long side L1 of the bottom surface 22 of the metal rubber block 2 is fixed at 47.6 mm, and the width W is fixed at 10.1 mm. The volume of the trapezoidal structure 23 on the metal rubber block 2 is Fixed value 4061.83mm 3 ,high Fixed value: 11.01mm.

[0079] Mass of metal rubber block 2 =ρ×(4.8076H–1.2332), where Unit: g; ρ unit: g / cm 3 ; The unit of H before substitution into the formula is mm.

[0080] According to the radius R of the groove structure set on the clamp body 1, the diameter D of the pipe 5 and the preset preload A of the metal rubber, the height H of the metal rubber block is determined to be A+(RD / 2). Specifically, the diameter D of the pipe 5 is 51 mm, and the radius R of the groove on the clamp is 41.8 mm. According to the preset density ρ of the metal rubber block = 1.789 g / cm 3, the preload of the metal rubber block is A = 3.7mm, so the height of the metal rubber is H = A + (RD / 2) = 20mm, and the mass of the metal rubber is =ρ×(0.48076H–1.2332)=15g. According to the central angle θ1 corresponding to all the metal rubber blocks 2 in the half clamp unit, the length L2 of the upper bottom surface 21 of the metal rubber block 2 and the outer diameter D of the pipeline 5, the area S on which the metal rubber is subjected to force is determined = Specifically, the outer diameter D of the pipe 5 is 51 mm, the central angle θ1 corresponding to all the metal rubber blocks 2 in the half clamp body 1 is 165°, and the length L2 of the upper bottom surface 21 of the metal rubber is 41 mm, so the area S of the metal rubber under force is = =3009.2mm 3 The load on the metal rubber block 2 is F. According to the load F and the force-bearing area S in step S1, the average pressure P=F / S generated when the metal rubber is subjected to force is determined.

[0081] In addition to the preset density of the metal rubber block 2 in the above steps, ρ = 2.932 g / cm 3 , the preload of the metal rubber block 2 is A=0.45mm, then the height of the metal rubber block 2 is H=A+(RD / 2)=16.75mm, and the mass of the metal rubber block 2 is =ρ×(0.48076H–1.2332)=20g.

[0082] In another embodiment, in the above steps, the diameter D of the pipeline 5 is 63 mm, the radius R of the groove structure on the clamp is 47.8 mm, so the height of the metal rubber block 2 is H=A+(RD / 2)=20 mm, and the central angle θ1 corresponding to all the metal rubbers in the half clamp body 1 is 170°, then the area of ​​the metal rubber subjected to the force is =3830.0mm 3 .

[0083] In the present invention, the pre-tightening amount of the metal rubber block 2 on the pipeline 5 is related to the density of the metal rubber block 2; the matching method of the pre-tightening amount of the metal rubber block 2 on the pipeline 5 and the density of the metal rubber block 2 is as follows:

[0084] Step S1: according to the preset density ρ of the metal rubber block 2, the long side L1 and the width W of the bottom surface 22 of the metal rubber block 2, the total height H of the metal rubber block 2 and the volume of the trapezoidal structure part 23 of the metal rubber block 2 ,high , determine the weight of metal rubber block 2 as =ρ×[ +L1×W×(H- )];

[0085] Step S2, determining the height H=A+(RD / 2) of the metal rubber block according to the radius R of the groove structure on the clamp body 1, the diameter D of the pipeline 5 and the preset preload amount A of the metal rubber block 2;

[0086] Step S3, the center angle θ1 corresponding to the metal rubber block 2 in the clamp unit, the long side L2 of the upper bottom surface 21 of the metal rubber block 2 and the outer diameter D of the pipeline 5, the force area S of the metal rubber block 2= ;

[0087] Step S4: The load on the metal rubber block 2 is F. According to the load F and the force-bearing area S obtained in step S3, the average pressure P=F / S generated when the metal rubber block 2 is subjected to force is determined;

[0088] Step S5: The density of the metal rubber block 2 is in the range of 1.5 to 3.0 g / cm 3 The range of preload is 0.1~5.5mm. The density and preload matching parameters of the metal rubber block 2 are: when P≥2N / mm 2 When the density is 1.789g / cm 3 , preload 3.7mm; when P<2N / mm 2 When the density is 2.932g / cm 3 , preload amount is 0.45mm.

[0089] The present invention provides a plurality of comparative examples, as follows:

[0090] Comparative Example 1:

[0091] In this comparative example, in addition to the preset metal rubber density ρ=2.602 g / cm in step S1 and step S2, 3 , the preload of the metal rubber block is A = 1.45mm; then the height of the metal rubber is H = A + (RD / 2) = 17.75mm; the mass of the metal rubber =ρ×(0.48076H–1.2332)=19g, and the remaining steps are the same as in Example 1.

[0092] Comparative Example 2:

[0093] In this comparative example, in addition to the preset metal rubber density ρ=2.441 g / cm in step S1 and step S2, 3 , the preload of the metal rubber block is A = 2.45mm; then the height of the metal rubber is H = A + (RD / 2) = 18.75mm; the mass of the metal rubber =ρ×(0.48076H–1.2332)=19g, and the remaining steps are the same as in Example 1.

[0094] Comparative Example 3:

[0095] In this comparative example, in addition to the preset metal rubber density ρ=1.647 g / cm in step S1 and step S2, 3 , the preload of the metal rubber block is A=5.2mm; then the height of the metal rubber is H=A+(RD / 2)=21.5mm; the mass of the metal rubber =ρ×(0.48076H–1.2332)=15g, and the remaining steps are the same as in Example 1.

[0096] Comparative Example 4:

[0097] In this comparative example, in addition to the preset metal rubber density ρ=2.087 g / cm in step S1 and step S2, 3 , the preload of the metal rubber block is A=3.2mm; then the height of the metal rubber is H=A+(RD / 2)=19.5mm; the mass of the metal rubber =ρ×(0.48076H–1.2332)=17g, and the remaining steps are the same as in Example 1.

[0098] Comparative Example 5:

[0099] In this comparative example, in addition to the preset metal rubber density ρ=2.441 g / cm in step S1 and step S2, 3 , the preload of the metal rubber block is A = 1.45mm; then the height of the metal rubber is H = A + (RD / 2) = 18.75mm; the mass of the metal rubber =ρ×(0.48076H–1.2332)=19g. In step S3, the central angle θ1 of all the metal rubbers in the half clamp is 170°. Then the area of ​​the metal rubber under force is =3830.0mm 3 , the remaining steps are the same as those in Example 1.

[0100] The present invention provides a clamp with different parameters for each embodiment and comparative example to perform static compression test and dynamic compression damping performance test. The specific results are shown in Table 1, Table 2 and Table 3.

[0101] In the static compression test, a target load of 20,000 N is slowly applied to the pipe 5 in the clamp. Multiple sets of load values ​​are selected from the collected load-displacement data. According to the stiffness formula Calculate the stiffness value corresponding to the selected load. The specific results are shown in Table 1.

[0102] According to P=F / S, the pressure on the metal rubber when the load is applied is calculated, and the static data results are fitted using the relationship between stiffness and pressure. The fitting results are as follows: Fig.12 shown.

[0103] The dynamic compression damping performance test is divided into two groups. One group of test parameters is: preload 2kN, test frequency 8Hz, amplitude 0.3mm, and the specific experimental results are shown in Table 1; the other group of parameters is: preload 9kN, test frequency 8Hz, amplitude 0.3mm, and the specific experimental results are shown in Table 3.

[0104] Among them, when the preload is 2kN, the average pressure on the metal rubber is less than 2N / mm 2 ; In the test experiment with a preload of 9kN, the average pressure on the metal rubber is greater than 2N / mm 2 .

[0105] In the above step S1, the long side L1 of the bottom surface 22 of the metal rubber block 2 is fixed at 47.6 mm, and the width W is fixed at 10.1 mm. The volume of the trapezoidal structure 23 on the metal rubber block 2 is Fixed value 4061.83mm 3 ,high The fixed value is 11.01mm.

[0106] In the above step S2, the design of the preload amount A is achieved by only changing the height of the lower rectangular structure portion 24 of the metal rubber block 2, that is, (H- ); No change In the above steps S1 and S2, the mass of the metal rubber block 2 satisfies =ρ×(0.48076H–1.2332), the metal rubber height satisfies the formula H=A+(RD / 2), Unit: g; ρ unit: g / cm 3 ; The unit of H before substitution into the formula is mm.

[0107] In the above step S3, the center angle θ1 corresponding to all the metal rubber blocks 2 in the clamp unit changes with the size of the pipeline 5. When the size of the pipeline 5 is the same, the center angle θ1 remains unchanged (the center angle θ1 remains unchanged here specifically means: 1. The center angle θ1 corresponding to all the metal rubber blocks 2 set in the same clamp unit remains unchanged; 2. In different pipelines 5, if the diameter of the pipeline 5 is the same, the center angle θ1 corresponding to the metal rubber block 2 set in the clamp unit remains unchanged). The average pressure is used as an evaluation influencing factor for selecting the density and preload matching method of the metal rubber block 2 in actual working conditions.

[0108] The molding direction of the metal rubber block 2 is perpendicular to its upper bottom surface 21 and lower bottom surface 22. The molding direction is consistent with the force direction of the metal rubber block 2 after tooling (the force direction is parallel to the pipeline direction). The lower half of the metal rubber block 2 can slide into the clamp along the groove structure on the clamp.

[0109] The upper clamp unit and the lower clamp unit have the same size, shape and structure, and all the trapezoidal metal rubber blocks 2 loaded into the clamps in the same batch have the same size, shape and structure.

[0110] For the entire pipeline vibration damping clamp, the upper clamp unit and the lower clamp unit are fixedly connected by a positioning bolt 4, on which an external threaded portion is provided, and a flat washer, a spring washer and a pre-tightening nut that are clamped on the upper side of the upper clamp are screwed onto the external threaded portion of the positioning bolt 4.

[0111] Through the above structural design, the pipeline vibration damping clamp provided by the present invention has at least the following beneficial effects compared with the prior art:

[0112] 1. The density and preload parameters of the metal rubber block 2 are designed in a coordinated manner, so that the metal rubber block 2 can obtain the minimum stiffness under the same pressure condition, thereby improving the vibration reduction effect of the metal rubber block 2;

[0113] 2. The contact surface between the metal rubber block 2 and the pipeline 5 can be completely close (that is, the upper bottom surface 21 of the metal rubber block 2 is completely and tightly fitted with the surface of the pipeline 5), and the lower bottom surface 22 of the metal rubber block 2 can be in contact with the internal groove of the clamp as much as possible (the lower bottom surface 22 of the metal rubber block 2 is completely and tightly fitted with the inner bottom surface of the groove structure on the clamp body 1), so that the force on the metal rubber part is more uniform. The present invention can apply a certain pressure to the metal rubber block 2 (press the metal rubber block 2 between the pipeline and the clamp body), so that the upper bottom surface 21 and the lower bottom surface 22 of the metal rubber block 2 are deformed, and it can also improve the tightness of the metal rubber block 2, the pipeline 5 and the groove structure.

[0114] 3. The molding method of the metal rubber block 2 can simultaneously increase the bearing capacity and the damping and vibration reduction effect of the metal rubber block 2.

[0115] Table 1a

[0116]

[0117] Table 1b

[0118]

[0119] Table 1c

[0120]

[0121] Table 2

[0122]

[0123] Table 3

[0124]

[0125] In the present invention, Table 1 covers more data. In order to display it more clearly, Table 1 is divided into Table 1a, Table 1b, and Table 1c for data display.

[0126] There are two types of stiffness: static stiffness and dynamic stiffness. The result of static test is called static stiffness, and the result of dynamic test is called dynamic stiffness. The stiffness in Table 1 represents static stiffness, while the stiffness in Table 2 and Table 3 is directly indicated as dynamic stiffness.

[0127] From the fitting results of the relationship between stiffness and pressure variation, Table 1, Table 2, Table 3 and Fig.12 The results show that when the pressure on the metal rubber is P ≥ 2N / mm 2 When the metal rubber density is 1.789g / cm 3 With a preload of 3.7mm; when the pressure on the metal rubber is P < 2N / mm 2 When the density of metal rubber is selected, the density is 2.932g / cm 3 The preload is 0.45 mm. The metal rubber block has the smallest rigidity, and the vibration reduction efficiency of the clamp device is higher.

[0128] The metal rubber block 2 is an integrated structure, and is specifically formed by pressing a forming mold 6 in cooperation with a forming block 7 .

[0129] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pipeline vibration damping clamp, characterized in that: include: At least two clamp units, all of which form a pipeline vibration-damping clamp that surrounds the pipeline; The clamp unit includes a clamp body, a groove structure is arranged on the clamp body, a plurality of metal rubber blocks are arranged in the groove structure, the upper bottom surface of the metal rubber block abuts against the pipeline surface, and the lower bottom surface of the metal rubber block abuts against the inner bottom surface of the groove structure; The molding direction of the metal rubber block is consistent with the force direction of the metal rubber block after tooling, and the molding direction of the metal rubber block is perpendicular to the upper and lower bottom surfaces of the metal rubber block; The metal rubber block includes a trapezoidal structure part and a rectangular structure part, the trapezoidal structure part has the upper bottom surface, and the rectangular structure part has a lower bottom surface; The metal rubber blocks are arranged in sequence and evenly distributed in the groove structure. In the same clamp unit, the trapezoidal structure parts of adjacent metal rubber blocks are abutted against each other, and the rectangular structure parts are evenly spaced. The clamp body is provided with limiting bolts, which are arranged at both ends of the groove structure and are used for limiting and fixing the metal rubber block arranged in the groove structure; A positioning bolt is arranged on the clamp body, and the positioning bolt passes through two adjacent clamp bodies in sequence to fix and connect the two adjacent clamp bodies.

2. The pipeline vibration damping clamp according to claim 1, characterized in that: A flat washer, a spring washer and a nut are used in conjunction with the limit bolt; A flat washer, a spring washer and a nut are used in conjunction with the positioning bolt.

3. The pipeline vibration damping clamp according to claim 1, characterized in that: The pre-tightening amount of the metal rubber block on the pipeline is related to the density of the metal rubber block; The matching method of the pre-tightening amount of the metal rubber block on the pipeline and the density of the metal rubber block is as follows: Step S1, according to the preset density ρ of the metal rubber block, the long side L1 of the bottom surface of the metal rubber block, the width W, the total height H of the metal rubber block and the volume of the trapezoidal structure of the metal rubber block ,high , determine the weight of the metal rubber block as =ρ×[ +L1×W×(H- )]; Step S2, according to the radius R of the groove structure on the clamp body, the pipe diameter D and the preset preload A of the metal rubber block, determine the height H=A+(RD / 2) of the metal rubber block, where the radius R, the pipe diameter D and the preload A are in units of mm before being substituted into the formula; Step S3, the central angle θ1 corresponding to the metal rubber block in the clamp unit, the long side L2 of the upper bottom surface of the metal rubber block and the outer diameter D of the pipeline, the force area S of the metal rubber block = ; Step S4, the load on the metal rubber block is F, and according to the load F and the force-bearing area S obtained in step S3, the average pressure P=F / S generated when the metal rubber block is subjected to force is determined; Step S5: The density of the metal rubber block is in the range of 1.5 to 3.0 g / cm 3 The preload value range is 0.1~5.5mm.

4. The pipeline vibration damping clamp according to claim 3, characterized in that: In the step S1 , the long side L1 of the bottom surface of the metal rubber block is fixed at 47.6 mm, and the width W is fixed at 10.1 mm.

5. The pipeline vibration damping clamp according to claim 4, characterized in that: In step S1, the volume of the trapezoidal structure of the metal rubber block is Fixed value 4061.83mm 3 ,high The fixed value is 11.01mm.

6. The pipeline vibration damping clamp according to claim 5, characterized in that: In step S2, the preload amount A is changed only by changing the height of the rectangular structure portion of the metal rubber block, and the height of the rectangular structure portion of the metal rubber block is H- ,in Is a fixed value.

7. The pipeline vibration damping clamp according to claim 6, characterized in that: In step S1 and step S2, the mass of the metal rubber block is =ρ×(0.48076H–1.2332); Where: The unit before substitution is g, and the unit before substitution is g / cm 3 , the unit of H before substitution into the formula is mm.

8. The pipeline vibration damping clamp according to claim 7, characterized in that: In the step S3, the central angle θ1 corresponding to the metal rubber block provided in the clamp unit changes with the diameter of the pipeline; When the diameter of the pipeline is the same, the central angle θ1 remains unchanged.

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