Anti-corrosion metal guardrail

Abstract

The utility model discloses an anti-corrosion metal guardrail which comprises an upper cross rod and a lower cross rod, a plurality of vertical rods are welded and fixed between the upper cross rod and the lower cross rod, the lower cross rod and the vertical rods are square tubes, the top face of the lower cross rod and the plane where the guardrail is located form an angle of 45 degrees, and the front side face of each vertical rod and the plane where the guardrail is located form an angle of 45 degrees. The outer sides of the upper cross rod, the lower cross rod and the vertical rods are all coated with anti-corrosion layers. The lower transverse rods and the vertical rods are arranged in an inclined mode, so that rainwater gathering at the welding seams is effectively reduced, corrosion of the rainwater to the welding seams is reduced, the service life of the guardrail is prolonged, the maintenance and repair cost in the follow-up operation process is reduced, cost is lower, and the cost performance is higher; compared with a traditional coating, the active porcelain glaze coating is resistant to abrasion and high temperature and stable and reliable in anti-corrosion effect, the active porcelain glaze coating is laid at the position of a welding seam to conduct reinforced protection on the welding seam, the anti-corrosion performance of an anti-corrosion layer at the position of the welding seam is improved, electrochemical corrosion is effectively prevented, and the durability of the guardrail is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal anti-corrosion, in particular to an anti-corrosion metal guardrail. Background Art

[0002] Metal guardrails are one of the common protective measures in roads and buildings. Metal guardrails are exposed to many external factors such as high temperature sunshine, rain and snow, temperature changes and local environment for a long time. In addition, the atmospheric environment in offshore areas has high chloride ion content, high temperature and high humidity, and corrosion is particularly serious. Therefore, the corrosion resistance of metal guardrails directly affects the protection, aesthetics and life cycle of the guardrails. The national standard "Technical Conditions for Anticorrosion of Steel Structures in Highway Traffic Engineering" (GB / T18226-2015) classifies and describes the anti-corrosion technology for steel structure guardrails. There are a total of 19 technologies commonly used in the preparation of anti-corrosion coatings for road guardrails, mainly hot-dip galvanizing coatings, which can have a certain protective effect.

[0003] However, for traditional guardrails, rainwater tends to gather at the lower welding point. After the water evaporates, the chloride ion concentration increases, the acidity of the solution increases, and the protective coating is easily destroyed, causing the guardrail to come into direct contact with the acidic solution to form a primary battery, further accelerating corrosion and causing the guardrail to rust and break, posing a safety hazard.

[0004] In view of the above technical problems, the applicant proposes an anti-corrosion metal guardrail. Utility Model Content

[0005] The purpose of the utility model is to provide an anti-corrosion metal guardrail to solve the technical problems mentioned in the background technology. The purpose of the utility model is achieved through the following technical solutions:

[0006] An anti-corrosion metal guardrail comprises an upper cross bar and a lower cross bar. A plurality of vertical bars are welded and fixed between the upper cross bar and the lower cross bar. The lower cross bar and the vertical bars are both square tubes. The top surface of the lower cross bar is arranged at a 45° angle to the plane where the guardrail is located. The front side surface of the vertical bar is arranged at a 45° angle to the plane where the guardrail is located. The outer sides of the upper cross bar, the lower cross bar and the vertical bars are all covered with an anti-corrosion layer.

[0007] Furthermore, there is a welding seam at the welding point between the vertical rod and the lower horizontal rod, and an active enamel coating is arranged at the welding seam, and the active enamel coating is located on the inner side of the anti-corrosion layer.

[0008] Furthermore, the distance between the edge of the active enamel coating and the welding seam is not less than 30 mm, and the thickness of the active enamel coating is not less than 0.25 mm.

[0009] Furthermore, the anti-corrosion layer includes a primer layer, a topcoat layer and a protective paint layer which are arranged in sequence from the inside to the outside.

[0010] The technical solution provided in the embodiments of the present application has at least the following technical effects or advantages:

[0011] 1. By setting the lower horizontal bar and the vertical bar at an angle, the accumulation of rainwater at the welding seam is effectively reduced, the corrosion of the welding seam by rainwater is reduced, the service life of the guardrail is extended, and the maintenance, maintenance and repair costs in the subsequent operation process are reduced, with lower costs and higher cost performance;

[0012] 2. Compared with traditional coatings, active porcelain glaze coatings are wear-resistant, high-temperature resistant, and have stable and reliable anti-corrosion effects. By applying active porcelain glaze coatings at the welding seams to strengthen protection of the welding seams, the corrosion resistance of the anti-corrosion layer at the welding seams is improved, effectively preventing electrochemical corrosion and improving the durability of the guardrail. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings in the specification, which constitute a part of the present 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 an improper limitation on the present invention.

[0014] Figure 1 This is the front view of the guardrail of the embodiment of the present application;

[0015] Figure 2 This is a front view of the connection between the vertical rod and the lower horizontal rod of the embodiment of the present application;

[0016] Figure 3 This is a cross-sectional view of the connection between the vertical rod and the lower horizontal rod in the embodiment of the present application.

[0017] Markings in the attached figure: 1. column; 2. upper cross bar; 3. lower cross bar; 4. vertical bar; 5. main cross bar. DETAILED DESCRIPTION

[0018] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the drawings and specific implementation methods of the specification. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] like Figure 1An anti-corrosion metal guardrail is shown, comprising upright posts 1, an upper cross bar 2, a lower cross bar 3, vertical bars 4 and a main cross bar 5. Two upright posts 1 are vertically installed on the ground, the main cross bar 5 is welded and fixed to the tops of the two upright posts 1, and both ends of the main cross bar 5 extend out of the upright posts 1 to both sides. The upper cross bar 2 and the lower cross bar 3 are welded and fixed in parallel between the two upright posts 1, and a plurality of vertical bars 4 are vertically welded and fixed between the upper cross bar 2 and the lower cross bar 3.

[0020] like Figure 2 , Figure 3 As shown, the lower cross bar 3 and the vertical bar 4 are both square tubes with a square cross-section, and the diameter of the vertical bar 4 is smaller than the diameter of the lower cross bar 3. The top surface of the lower cross bar 3 is set at a 45° angle to the plane where the guardrail is located, and the front side surface of the vertical bar is set at a 45° angle to the plane where the guardrail is located, thereby forming a downward inclined weld seam at the connection between the vertical bar 4 and the lower cross bar 3, thereby avoiding rainwater accumulation at the weld seam and reducing the corrosion of the weld seam by rainwater.

[0021] The outer sides of the upright posts 1, upper crossbars 2, lower crossbars 3, vertical bars 4 and main crossbars 5 are all covered with an anti-corrosion layer (not shown), which includes a primer layer, a topcoat layer and a protective paint layer arranged in sequence from the inside to the outside to prevent metal corrosion of the guardrail.

[0022] As a preferred embodiment of the present application, an active enamel coating (not shown) is applied at the welding seam, the active enamel coating is located inside the anti-corrosion layer, the distance between the edge of the active enamel coating and the welding seam is not less than 30 mm, and the thickness of the active enamel coating is not less than 0.25 mm. Compared with traditional coatings, the active enamel coating is wear-resistant, high-temperature-resistant, and has a stable and reliable anti-corrosion effect, which improves the corrosion resistance of the anti-corrosion layer at the welding seam, effectively prevents electrochemical corrosion, and improves the durability of the guardrail.

[0023] The manufacturing method of the embodiment of the present application is:

[0024] First, the columns, upper crossbars, lower crossbars, vertical bars and main crossbars are welded and assembled according to the specifications; then, the active porcelain glaze coating powder sieved through 200 mesh is evenly sprayed on the weld area by electrostatic spraying for 30 seconds, and the active porcelain glaze coating is sintered at 540°C for 20 minutes to obtain the active porcelain glaze coating; finally, the guardrail is naturally cooled to room temperature and then sprayed with primer, topcoat and protective paint in sequence.

[0025] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present utility model: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0026] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An anti-corrosion metal guardrail, comprising an upper crossbar and a lower crossbar, wherein a plurality of vertical bars are welded and fixed between the upper crossbar and the lower crossbar, characterized in that: The lower cross bar and the vertical bar are both square tubes. The top surface of the lower cross bar is set at a 45° angle to the plane where the guardrail is located. The front side surface of the vertical bar is set at a 45° angle to the plane where the guardrail is located. The outer sides of the upper cross bar, the lower cross bar and the vertical bar are all covered with an anti-corrosion layer.

2. The anti-corrosion metal guardrail according to claim 1, characterized in that: A welding seam is formed at the welding point between the vertical rod and the lower horizontal rod, and an active enamel coating is arranged at the welding seam. The active enamel coating is located on the inner side of the anti-corrosion layer.

3. The anti-corrosion metal guardrail according to claim 2, characterized in that: The distance between the edge of the active enamel coating and the welding seam is not less than 30 mm, and the thickness of the active enamel coating is not less than 0.25 mm.

4. The anti-corrosion metal guardrail according to claim 1, characterized in that: The anti-corrosion layer comprises a primer layer, a topcoat layer and a protective paint layer which are arranged in sequence from the inside to the outside.

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