Pipeline anti-collision device

Abstract

The utility model relates to a pipeline anti-collision device, which belongs to the field of gas pipeline anti-collision rods and comprises a plurality of bent rod sections which are arranged in parallel along the vertical direction. The bent rod section is arranged on the gas pipeline in a sleeving mode and does not make contact with the gas pipeline. The bent rod section is a symmetrical graph when being observed from a top view; the bent rod section is divided into a section A, a section B and a section C which are connected in sequence; the end, away from the section B, of the section A is set as a point O, the end, away from the section B, of the section C is set as a point P, a Cartesian coordinate system is established with the point O as the original point and the straight line OP as the X axis, and the section A, the section B and the section C meet the equation that # imgabs0 # f1 is the maximum length of the section A in the X-axis direction; l1 is the maximum height of the section A in the Y-axis direction; f2 is the maximum length of the section B in the X-axis direction; l2 is the maximum height of the section B in the Y-axis direction; connecting plates are fixed to the two ends of the bent rod section and fixed to a wall through bolts. The bent rod section can resist bending.

Description

Technical Field

[0001] The utility model belongs to the field of anti-collision rods for gas pipelines, and particularly relates to a pipeline anti-collision device. Background Art

[0002] In areas such as underground parking lots, in order to prevent vehicles or other objects from colliding with gas pipelines, gas pipeline guardrails are usually used to protect the gas pipelines.

[0003] Currently, the most common guardrail is U-shaped. When viewed from a top view, the U-shaped guardrail can be roughly regarded as straight segments on both sides and an arc segment connecting the two straight segments. When the arc segment of the U-shaped guardrail is impacted, due to its arc structure, no matter where the impact force acts on the arc segment, it can better reduce the bending moment of the entire guardrail and reduce the deformation of the guardrail. However, if the impact force acts on the straight segment of the guardrail, the bending moment of the entire guardrail will be relatively large, resulting in relatively large deformation.

[0004] Therefore, it is not difficult to think of designing the guardrail into an arch structure, avoiding the design of straight segments, so that no matter which position of the guardrail is impacted by the impact force, the bending moment of the guardrail can be made smaller and the bending resistance ability can be enhanced. Currently, the difficulty lies in that although the arch-shaped guardrail can improve the bending resistance ability, it is not clear which parameters of the arch-shaped guardrail have the optimal bending resistance ability. Content of the Utility Model

[0005] The pipeline anti-collision device of the utility model designs a guardrail with the strongest bending resistance ability.

[0006] The pipeline anti-collision device of the utility model includes a plurality of bent rod segments, and each bent rod segment is arranged side by side vertically; the bent rod segments are sleeved on the gas pipeline, and the bent rod segments do not contact the gas pipeline;

[0007] When viewed from a top view, the bent rod segment is a symmetric figure; the bent rod segment is divided into segment A, segment B, and segment C that are connected in sequence; let the end of segment A far from segment B be point O, and let the end of segment C far from segment B be point P. Taking point O as the origin and the straight line OP as the X-axis to establish a Cartesian coordinate system, segment A, segment B, and segment C satisfy the equation:

[0008]

[0009] f1 is the maximum length of segment A along the X-axis direction; l1 is the maximum height of segment A along the Y-axis direction; f2 is the maximum length of segment B along the X-axis direction; l2 is the maximum height of segment B along the Y-axis direction; denote the axis of symmetry of the aforementioned bent rod segment as line M; line M passes through the point (f1 + f2 / 2, 0) and is perpendicular to the X-axis;

[0010] Both ends of the bent rod segment are fixed with connecting plates, and the connecting plates are fixed on the wall by bolts.

[0011] This solution limits the curved rod section to a reasonable arch line shape.

[0012] Furthermore, a plurality of reinforcement segments are provided between two adjacent curved rod segments, and two ends of each reinforcement segment are respectively fixed on the two curved rod segments; and each reinforcement segment is equidistantly arranged along the trajectory of the curved rod segment.

[0013] The use of reinforced sections allows each moment segment to form a whole, achieving overall bending resistance, making the force and bending moment more comprehensive and not concentrated on a certain moment segment. Moreover, the equidistant design of the reinforced sections also avoids the difference in force and bending moment at each position, further ensuring that the bending resistance at each location is equal.

[0014] Furthermore, the bent rod section and the reinforcement section are in the shape of round rods, and the diameters of the bent rod section and the reinforcement section are equal.

[0015] Regular round rods will not cause stress concentration. And the equal diameters make them easy to process uniformly.

[0016] Furthermore, each of the bent rod segments is arranged equidistantly in the vertical direction.

[0017] In the vertical direction, the spacing between each bent rod section is equal, and there will be no unequal gaps between two adjacent bent rod sections. If unequal gaps occur, the impactor cannot penetrate the position with a small gap, while the position with a larger gap can be easily invaded by the impactor, resulting in a worse protection effect on the gas pipeline at the position with a larger gap.

[0018] Furthermore, f 1 =100mm, l 1 =260mm, f 2 ＝ 200mm; l 2 ＝ 500mm.

[0019] After simulation data analysis, it is found that when the bending rod section is subjected to impact forces in two different directions, the difference in bending moments in the two directions is small. The advantage of this design is that it is not easy to cause the bending rod section to deform seriously due to a tricky impact angle, and it can effectively resist bending under impacts of various angles.

[0020] Beneficial effects:

[0021] 1. This scheme adopts the curved rod section of the arch reasonable line; and designs the curved rod section of the arch reasonable line.

[0022] 2. A better design parameter is given through simulation, namely f 1 =100mm, l 1 =260mm, f 2＝ 200mm; l 2＝ 500mm. Description of the Drawings

[0023] Figure 1 is a schematic diagram of the overall structure of the present device;

[0024] Figure 2 is a top view of the bent rod section and the gas pipeline;

[0025] Figure 3 is a bending moment diagram of the bent rod section when subjected to a horizontal force;

[0026] Figure 4 is a force diagram of the bent rod section when subjected to a horizontal force;

[0027] Figure 5 is a bending moment diagram of the U-shaped bent rod section when subjected to a horizontal force;

[0028] Figure 6 is a force diagram of the U-shaped bent rod section when subjected to a horizontal force.

[0029] 1. Bent rod section; 2. Reinforcement section; 3. Connection plate; 4. Bolt; 5. Gas pipeline. Specific Embodiments

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] Embodiment 1:

[0032] The pipeline anti-collision device includes a plurality of bent rod sections 1, and each bent rod section 1 is arranged side by side vertically. In this embodiment, each bent rod section 1 is arranged at equal intervals vertically. A plurality of reinforcement sections 2 are welded between two adjacent bent rod sections 1.

[0033] The bent rod section 1 is a round rod with a circular end face. Looking at it from the top view, it is assumed that the bent rod section 1 is composed of three parts, which are sequentially denoted as section A, section B, and section C, and section A, section B, and section C are sequentially connected; the bent rod section 1 is an overall symmetric figure.

[0034] Looking at it from the top view, let the end of section A away from section B be point O, and let the end of section C away from section B be point P. Taking point O as the origin and line OP as the X-axis, a Cartesian coordinate system is established.

[0035] Then, the equations of the three parts of the bent rod section 1 are:

[0036]

[0037] See Figure 2 , where f1 is the maximum length of segment A along the X-axis; l1 is the maximum height of segment A along the Y-axis; f2 is the maximum length of segment B along the X-axis; l2 is the maximum height of segment B along the Y-axis. Denote the axis of symmetry of the aforementioned bent rod segment 1 as line M; line M passes through the point (f1 + f2 / 2, 0) and is perpendicular to the X-axis;

[0038] See Figure 1 , the bent rod segment 1 is sleeved on the gas pipeline 5, and the bent rod segment 1 does not contact the gas pipeline 5. In this embodiment, it is assumed that the gas pipeline 5 is a straight pipe, and the axis of the gas pipeline 5 is arranged vertically. Connecting plates 3 are respectively fixedly connected to both ends of the bent rod segment 1. In this embodiment, the connecting plates 3 are welded to both ends of the bent rod segment 1, and the shape of the connecting plates 3 is a rectangular plate. During actual installation, the connecting plates 3 are installed on the wall through bolts 4 to ensure that the bent rod segment 1 can protect the gas pipeline 5.

[0039] Each reinforcing segment 2 is a round rod, the diameter of the reinforcing segment 2 is equal to the diameter of the bent rod segment 1, the axis of each reinforcing segment 2 is arranged vertically, and the reinforcing segments 2 are arranged at equal intervals along the trajectory of the bent rod segment 1. Both ends of the reinforcing segment 2 are welded to two adjacent bent rod segments 1 respectively.

[0040] Embodiment 2:

[0041] Generally, gas pipelines have their own implementation standards. For example, the diameter of natural gas pipelines is

[0042] 219mm - 3620mm. Generally, the natural gas pipeline supplied to households is about 370mm. Taking the protection of a 370mm gas pipeline as an example of the standard, for a gas pipeline of this size, a bent rod segment of a certain standard is designed to analyze its impact force situation.

[0043] Parameter standard:

[0044] The bent rod segment with an arch reasonable linear type where f1 is 100mm and l1 is 200mm, that is, the bent rod segment of the scheme of Embodiment 1; f2 is 200mm and l2 is 500mm; the shape is as Figure 3 of the bent rod segment.

[0045] Viewed from the top view, see Figure 3 , a 1kN horizontal force is applied at a height of 300mm from the horizontal axis of the bent rod segment. A physical model of the bent rod segment is established in the numerical analysis software, and a 1kN horizontal force is also applied at a height of 300mm, and the bending moment diagram of the bent rod segment of this scheme is obtained, see Figure 3 .

[0046] As Figure 3 , under the action of the aforementioned 1kN horizontal force, the bending moment at the connection of both ends of the bent rod segment is 0.6kN . m.

[0047] A physical model of the aforementioned bent rod section was also established in the force analysis software, and a 1 kN force was applied at the same position as mentioned above to obtain the force diagram of the bent rod section of this solution, as shown in Figure 4 .

[0048] As can be seen from Figure 4 , the forces at various parts of the bent rod section are relatively uniform, and there are no prominent stress points. Therefore, it can be known that when the bent rod section is subjected to a force impact, it is not easy to deform and the forces at various parts are uniform.

[0049] Figure 5 is the bending moment diagram of the U-shaped bent rod section with a 1 kN horizontal force applied at a position 300 mm from the horizontal axis. As can be seen from Figure 5 , the bending moment at the connection of the U-shaped bent rod section is significantly greater than that at the connection of the bent rod section of this solution, so the U-shaped bent rod section is more likely to deform.

[0050] Figure 6 is the force diagram of the U-shaped bent rod section with a 1 kN horizontal force applied at a position 300 mm from the horizontal axis. As can be seen from Figure 6 , the force at the connection of the U-shaped bent rod section is greater than that at the connection of the bent rod section of this solution.

[0051] In addition, it should be noted that since the arch section of the U-shaped bent rod section is similar to this solution in terms of bending moment and force diagram after being stressed, no additional analysis will be carried out.

[0052] In summary, the bent rod section of this solution is more reasonably designed and has a stronger protective effect than the U-shaped bent rod section in the prior art.

[0053] Example 3:

[0054] Taking a 370 mm gas pipe as an example, it is assumed that the bent rod section in Example 1 is used to protect it. It is assumed that there are various parameter specifications in the bent rod section of this solution established, which are: f1 is 100 mm; l1 are 200 mm, 220 mm, 240 mm, 260 mm, 280 mm and 300 mm respectively, f2 is 200 mm; l2 is 500 mm, and the corresponding standard bent rod sections are established respectively.

[0055] In order to determine which standard bent rod section has the best anti-collision ability effect, a 1 kN horizontal force is applied to each standard bent rod section at a position 400 mm from it. The bending moment data at the connections of each bent rod section obtained by the numerical simulation software are shown in Table 1.

[0056] Table 1 Bending moments of different bent rod sections under horizontal forces at the same position

[0057]

[0058]

[0059] Similarly, apply a 1 kN force at a 45-degree angle to the X-axis at a distance of 400 mm from each arched reasonable line bent rod section; the bending moment data at the joints of each bent rod section obtained are shown in Table 2.

[0060] Table 2 Bending Moments under 45-degree Angle Forces at the Same Position of Different Bent Rod Sections

[0061]

[0062] Similarly, apply a 1 kN force at a 45-degree angle to the X-axis at a distance of 450 mm from each arched reasonable line bent rod section; the bending moment data at the joints of each bent rod section obtained are shown in Table 3.

[0063] Table 3 Bending Moments under 45-degree Angle Forces at the Same Position of Different Bent Rod Sections

[0064]

[0065]

[0066] According to Tables 1, 2, and 3, calculate the error. Let the bending moment at the left horizontal joint be M1; the bending moment at the right horizontal joint be M2; at 400 mm, the bending moment at the left 45-degree joint be T1; the bending moment at the right 45-degree joint be T2. At 450 mm, the bending moment at the left 45-degree joint be Q1; the bending moment at the right 45-degree joint be Q2, and record the error as D;

[0067] Then:

[0068] Record all the errors in Table 3.

[0069] Table 3 Errors of Different Bent Rod Sections

[0070]

[0071] As can be seen from Table 3, among the above standard bent rod sections:

[0072] Suppose for the protection of a 370 mm standard gas pipeline, if it is produced using a certain standard design type of bent rod section, if at f1 = 100 mm, l1 = 260 mm, f 2＝ 200 mm; l 2＝ 500 mm, construct the arched reasonable line bent rod section. When the constructed bent rod section is subjected to an impact force at a certain angle, the bending moment difference is the smallest. It is most suitable to design the bent rod section according to this standard. According to the inference of other design schemes, because the error is large, there may be a situation where the bending moment is large and the force deformation is obvious under extreme impact angles. Therefore, other design standards are not suitable for designing the bent rod section.

[0073] Based on the above inspiration from the ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications within the scope not deviating from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. Pipeline anti-collision device, characterized in that, It includes multiple bent rod segments, and the bent rod segments are arranged side by side vertically; the bent rod segments are sleeved on the gas pipeline, and the bent rod segments do not contact the gas pipeline; Observed from the top view, the bent rod segment is a symmetric figure; the bent rod segment is divided into segment A, segment B and segment C which are connected in sequence; let the end of segment A far from segment B be point O, and let the end of segment C far from segment B be point P. Taking point O as the origin and the straight line OP as the X-axis to establish a Cartesian coordinate system, segment A, segment B and segment C satisfy the equation: f1 is the maximum length of segment A in the X-axis direction; l1 is the maximum height of segment A in the Y-axis direction; f2 is the maximum length of segment B in the X-axis direction; l2 is the maximum height of segment B in the Y-axis direction; denote the axis of symmetry of the aforementioned bent rod segment as line M; line M passes through the point (f1 + f2 / 2, 0) and is perpendicular to the X-axis; Connection plates are fixed at both ends of the bent rod segment, and the connection plates are fixed to the wall by bolts.

2. The pipeline anti-collision device according to claim 1, wherein, A number of strengthening segments are provided between adjacent bent rod segments, and both ends of each strengthening segment are respectively fixed to the two bent rod segments; each strengthening segment is arranged at equal intervals along the trajectory of the bent rod segment.

3. The pipeline anti-collision device according to claim 2, characterized in that, The shapes of the bent rod segments and the strengthening segments are circular rods, and the diameters of the bent rod segments and the strengthening segments are equal.

4. The pipeline anti-collision device according to claim 2, characterized in that Each of the bent rod segments is arranged at equal intervals vertically.

5. The pipeline anti-collision device according to claim 2, characterized in that, f 1 = 100 mm, l 1 = 260 mm, f 2＝ 200 mm; l 2＝ 500 mm.

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