Coal conveying belt conveyor trestle deformation joint and construction method thereof

Abstract

The invention discloses a coal conveying belt conveyor trestle deformation joint and a construction method thereof. The trestle deformation joint sequentially comprises a bottom layer, a top layer, a bottom layer and a top layer from bottom to top, wherein the bottom layer is a U-shaped pocket made of two-cloth eight-coating LEAC acrylic polymer cement waterproof coating impregnated native polyester fiber reinforced cloth; the thermal insulation layer comprises a rubber surface filled in the deformation joint and a waterproof coating emulsion poured in a gap between the rubber surface and the deformation joint; the waterproof layer comprises a two-cloth eight-coating LEAC acrylic polymer cement waterproof coating layer and an LEAC waterproof emulsion layer; the protective layer is made of aluminum foil glass fabric or a steel plate with the same width as the deformation joint. It can be guaranteed that the waterproof layer has enough binding power and certain flexibility, deformation can be achieved along with a floor and a deformation joint, damage is avoided during large deformation due to enough stretching and twisting strength, and the waterproof layer can return to the original position after deformation is recovered due to enough elasticity; the performance is not obviously changed under the action of vibration load and temperature of the next year due to sufficient fatigue resistance.

Description

Technical Field

[0001] The invention relates to the design of deformation joints of trestles in mining, metallurgy, chemical industry and other industries, and in particular to a deformation joint of a trestles of a coal conveyor belt conveyor and a construction method thereof. Background Art

[0002] Coal conveyor belt trestles are widely used in modern large-scale mine ground transportation due to their advantages of economy, convenience, excellent matching with production and high degree of automation. With the development of my country's mining, metallurgy and other industries and the continuous improvement of construction technology, the trestles have evolved from the initial brick-concrete structure and reinforced concrete structure to the modern trestles with large spans, long distances, large transport capacity and high speeds that are now widely used in combination with brackets and steel trusses. In the process of using modern trestles, in order to avoid coal dust and ensure the hygiene of the trestles, it is often necessary to use an automatic water flushing system to flush the trestles, belt frames, steel trusses, enclosure systems, etc. This part of the flushing water and the water added to the coal in the various links of mining, underground transportation and coal washing often flow from the floor deformation joints to the steel structure supports and brackets, thereby causing corrosion damage to the brackets and supports, which seriously reduces the service life of the trestles. Therefore, waterproofing and drainage measures for the trestles should be taken.

[0003] In order to take waterproof and drainage measures for the trestle structure, some existing trestles usually adopt the method of laying only a mortar surface layer or concrete pouring layer with waterproofing agent added on the floor, or adding a simple waterproof layer in the right-angle transition area between the floor and the vertical sandwich panel on both sides. However, the above waterproof measures have little effect in actual engineering and cannot meet the durability requirements of the coal conveyor belt trestles.

[0004] In addition, my country's existing coal mines are mainly located in the cold northern regions. In addition to the waterproof function, the expansion joints should also have thermal insulation properties to prevent ice and frost from forming on the expansion joints in the trestle in winter and causing damage. Summary of the invention

[0005] In order to meet the urgent needs of the project, the present invention provides a coal conveyor belt trestle deformation joint and a construction method thereof, wherein the trestle deformation joint has excellent waterproof and thermal insulation properties.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A coal conveyor belt trestle deformation joint comprises, from bottom to top:

[0008] The bottom layer is a U-shaped pocket made of two cloths and eight coats of LEAC acrylic polymer cement waterproof coating impregnated with virgin polyester fiber reinforced fabric;

[0009] The thermal insulation layer includes a rubber surface filled in the deformation joint and a waterproof coating emulsion poured into the gap between the rubber surface and the deformation joint;

[0010] The waterproof layer comprises two layers of eight LEAC acrylic polymer cement waterproof coating and a LEAC waterproof emulsion layer poured on the waterproof coating layer, wherein the thickness of the LEAC waterproof emulsion layer is 3 mm;

[0011] The protective layer is made of aluminum foil, fiberglass cloth or steel plate with the same width as the expansion joint.

[0012] Furthermore, the thickness of the bottom layer is 3 mm, and the construction includes the following steps: on the original polyester fiber reinforcement cloth (the reinforcement cloth material amount is 3-4 kg / m 2 ) Apply a layer of LEAC acrylic polymer cement waterproof coating on the reinforced cloth, and then apply the second layer after the coating is completely dry and forms a film. Use a scraper to smooth the wrinkles along the longitudinal direction of the reinforced cloth and allow the coating to penetrate the cloth. Then apply the third and fourth layers in sequence. After the first and fourth coats are completely dry, apply the second one-coat and four-coat according to the above process.

[0013] Furthermore, the rubber surface adopts a rubber-plastic surface of B1 grade flame retardant material (the thermal conductivity can be as low as 0.033w / m·K at 0°C) with a thermal conductivity far lower than that of reinforced concrete (the thermal conductivity is 1.55-1.63W / (m·K)).

[0014] Furthermore, the thickness of the two-layer eight-layer LEAC acrylic polymer cement waterproof coating layer is 3 mm, and the construction includes the following steps:

[0015] First apply a layer of acrylic polymer cement waterproof coating, and then apply the second layer after the coating is completely dry and forms a film. Immediately spread LEAC special reinforced cloth while it is still wet, use a scraper to smooth out the wrinkles along the longitudinal direction of the reinforced cloth, and allow the coating to penetrate the cloth. Then apply the third and fourth layers in sequence. After the first and fourth coats are completely dry, apply the second one-coat-four-coat according to the above process.

[0016] Furthermore, for deformation joints with large deformation capacity, anchor bolts need to be added to fix the waterproof layer.

[0017] Furthermore, when the width of the deformation joint is ≤50mm, the protective layer is made of aluminum foil fiberglass cloth with the same width as the deformation joint; when the width of the deformation joint is >50mm, the protective layer is made of steel plate.

[0018] The present invention also provides a method for constructing the above-mentioned coal conveyor belt trestle deformation joint, comprising the following steps:

[0019] S1. Laying the base layer

[0020] In the original polyester fiber reinforced cloth (reinforced cloth material dosage 3 ~ 4kg / m 2) and apply a layer of LEAC acrylic polymer cement waterproof coating on the reinforced fabric. After the coating is completely dry and forms a film, apply a second layer. Use a scraper to smooth the wrinkles along the longitudinal direction of the reinforced fabric and allow the coating to penetrate the fabric. Then apply the third and fourth layers in sequence. After one coat and four coats are completely dry, apply another one coat and four coats according to the above process to obtain a U-shaped pocket made of two coats and eight coats of LEAC acrylic polymer cement waterproof coating impregnated with virgin polyester fiber reinforced fabric.

[0021] S2. Laying insulation layer

[0022] Fill the deformation joint with rubber surface, and pour waterproof coating emulsion into the gap between the rubber surface and the deformation joint, and wait for the waterproof coating emulsion to dry to obtain the insulation layer;

[0023] S3. Laying waterproof layer

[0024] First, apply a layer of LEAC acrylic polymer cement waterproof coating on the thermal insulation layer, and then apply a second layer after the coating is completely dry and forms a film, and then apply the third layer and the fourth layer in sequence, and after the first coat and four coats are completely dry, apply a second one coat and four coats according to the above process to obtain two coats and eight coats of LEAC acrylic polymer cement waterproof coating layer, and then pour LEAC waterproof emulsion on the two coats and eight coats of LEAC acrylic polymer cement waterproof coating layer, and wait for the LEAC waterproof emulsion to be completely dry to obtain a waterproof layer;

[0025] S4. Laying protective layer

[0026] Lay aluminum foil fiberglass cloth or steel plate with the same width as the expansion joint on the waterproof layer.

[0027] Furthermore, in the step S3, for deformation joints with large deformation capacity, anchor bolts are required to fix the waterproof layer, and water-based anti-rust paint is applied on the surface of the bolts with a thickness of not less than 200 μm. After the paint is dry, BY01 water-based thick low-quality anti-corrosion paint with a thickness of 1.0 mm is applied three times for anti-corrosion.

[0028] Furthermore, in the step S4, when the width of the deformation joint is greater than 50 mm, a covering steel plate is selected, and a water-based anti-rust paint with a thickness of not less than 200 μm is applied to the surface of the steel plate. After the paint is dry, a BY01 water-based thick low-treatment anti-corrosion paint with a thickness of 1.0 mm is applied three times for anti-corrosion.

[0029] The present invention proposes a method for a coal conveyor belt trestle deformation joint that can resist large deformation and has waterproof and heat-insulating functions based on the different structural forms and deformation sizes on both sides of the deformation joint and in combination with engineering experience. The method can ensure that the waterproof layer has sufficient adhesion and a certain flexibility to accompany the deformation of the floor and the deformation joint, sufficient tensile and torsional strength to avoid damage during large deformation, sufficient elasticity to return to the original position after deformation recovery, and sufficient fatigue resistance so that the performance does not change significantly under vibration loads and temperature effects year after year. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0031] Figure 1 This is a schematic structural diagram of a deformation joint of a coal conveyor belt trestle according to an embodiment of the present invention;

[0032] In the figure: 1- bottom layer; 2- thermal insulation layer; 3- rubber surface; 4- two-cloth eight-coat LEAC acrylic polymer cement waterproof coating layer; 5- LEAC waterproof emulsion layer; 6- protective layer. DETAILED DESCRIPTION

[0033] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0034] Example 1

[0035] like Figure 1 The coal conveyor belt trestle deformation joint comprises, from bottom to top:

[0036] The bottom layer 1 is made of a 3mm thick U-shaped bag made of two cloths and eight coats of LEAC acrylic polymer cement waterproof coating impregnated with virgin polyester fiber reinforced cloth, which is used to close the opening above the deformation joint of the trestle floor and block the flow of coal water into the deformation joint;

[0037] The thermal insulation layer 2 includes a rubber surface 3 filled in the deformation joint, and a waterproof coating emulsion poured into the gap between the rubber surface and the deformation joint. The rubber surface is made of a rubber-plastic surface (the thermal conductivity can be as low as 0.033w / m·K at 0°C) with a thermal conductivity far lower than that of reinforced concrete (the thermal conductivity is 1.55-1.63W / (m·K)) and is a Class B1 flame retardant material. The rubber surface mainly plays a role of thermal insulation and protects the waterproof layer from being damaged in winter.

[0038] The waterproof layer includes two layers of eight LEAC acrylic polymer cement waterproof coating layers 4 and a LEAC waterproof emulsion layer 5 poured on the waterproof coating layer. The thickness of the LEAC waterproof emulsion layer 5 is preferably 3 mm, which is used to further improve the waterproof performance of the deformation joint;

[0039] The protective layer 6 adopts aluminum foil glass fiber cloth or steel plate with the same width as the deformation joint to prevent damage from external forces; when the width of the deformation joint is ≤50mm, the protective layer adopts aluminum foil glass fiber cloth with the same width as the deformation joint; when the width of the deformation joint is greater than 50mm, the protective layer adopts steel plate. The surface of the anchor bolt needs to be painted with water-based anti-rust paint with a thickness of not less than 200um. After the paint is dry, it is coated with BY01 water-based thick low-treatment anti-corrosion paint with a thickness of 1.0mm in three times for corrosion protection.

[0040] For deformation joints with large deformation capacity, anchor bolts need to be added to fix the waterproof layer. The surface of the anchor bolts needs to be painted with water-based anti-rust paint with a thickness of not less than 200um. After the paint dries, BY01 water-based thick low-treatment anti-corrosion paint with a thickness of 1.0mm is applied three times for anti-corrosion.

[0041] Example 2

[0042] A method for constructing a deformation joint of a coal conveyor belt trestle comprises the following steps:

[0043] S1. Lay the bottom layer, close the opening above the deformation joint of the trestle floor, and block the flow of coal and water into the deformation joint;

[0044] In the original polyester fiber reinforced cloth (reinforced cloth material dosage 3 ~ 4kg / m 2 ) and apply a layer of LEAC acrylic polymer cement waterproof coating on the reinforced fabric. After the coating is completely dry and forms a film, apply a second layer. Use a scraper to smooth the wrinkles along the longitudinal direction of the reinforced fabric and allow the coating to penetrate the fabric. Then apply the third and fourth layers in sequence. After one coat and four coats are completely dry, apply another one coat and four coats according to the above process to obtain a U-shaped pocket made of two coats and eight coats of LEAC acrylic polymer cement waterproof coating impregnated with virgin polyester fiber reinforced fabric.

[0045] S2. Lay the insulation layer, which mainly plays the role of insulation and protects the waterproof layer from being damaged in winter;

[0046] Fill the deformation joint with a rubber-plastic surface (the thermal conductivity can be as low as 0.033w / m·K at 0℃) of B1 grade flame retardant material with a thermal conductivity far lower than that of reinforced concrete (the thermal conductivity is 1.55-1.63W / (m·K)) to protect the waterproof layer from being frozen in winter, and pour waterproof coating emulsion into the gap between the rubber surface and the deformation joint, and wait for the waterproof coating emulsion to dry to obtain the insulation layer;

[0047] S3. Laying waterproof layer

[0048] First, apply a layer of LEAC acrylic polymer cement waterproof coating on the thermal insulation layer, and then apply a second layer after the coating is completely dry and forms a film, and then apply the third layer and the fourth layer in sequence, and after the first coat and four coats are completely dry, apply a second one coat and four coats according to the above process to obtain two coats and eight coats of LEAC acrylic polymer cement waterproof coating layer, and then pour LEAC waterproof emulsion on the two coats and eight coats of LEAC acrylic polymer cement waterproof coating layer, and wait for the LEAC waterproof emulsion to be completely dry to obtain a waterproof layer;

[0049] S4. Lay a protective layer to prevent damage from external forces

[0050] Lay 1mm thick aluminum foil fiberglass cloth or 10mm thick steel plate on the waterproof layer. Specifically, when the width of the expansion joint is ≤50mm, lay aluminum foil fiberglass cloth with the same width as the expansion joint on the waterproof layer; when the width of the expansion joint is >50mm, choose to cover the steel plate, and apply water-based anti-rust paint with a thickness of not less than 200μm on the surface of the steel plate. After the paint dries, apply BY01 water-based thick low-quality anti-corrosion paint with a thickness of 1.0mm three times for anti-corrosion.

[0051] It is worth noting that in the step S3, for deformation joints with large deformation capacity, anchor bolts are used to fix the waterproof layer. The bolts are arranged in a plum blossom shape with a spacing of 200 mm. The surface of the bolts is painted with water-based anti-rust paint with a thickness of not less than 200 μm. After the paint dries, BY01 water-based thick low-treatment anti-corrosion paint with a thickness of 1.0 mm is applied three times for corrosion protection. In this embodiment, the deformation capacity mainly depends on the structural form on both sides of the deformation joint. For example, both sides of the deformation joint are steel trusses or prefabricated panels, or one side is a hinge support or roller support. In this case, the deformation joint and the floor surfaces on both sides thereof change greatly.

[0052] The trestle deformation joint method of the present invention has been applied to coal transport trestles in multiple coal mines in northern Shaanxi. After three years of practical application test on multiple coal transport trestles with an annual belt conveying capacity of more than 20 million tons, it has excellent waterproof and heat-insulating effects.

[0053] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A coal conveyor belt bridge deformation joint, characterized in that: From bottom to top they include: The bottom layer is a U-shaped pocket made of two cloths and eight coats of LEAC acrylic polymer cement waterproof coating impregnated with virgin polyester fiber reinforced fabric; The thermal insulation layer includes a rubber surface filled in the deformation joint and a waterproof coating emulsion poured into the gap between the rubber surface and the deformation joint; The waterproof layer comprises two layers of eight LEAC acrylic polymer cement waterproof coating and a LEAC waterproof emulsion layer poured on the waterproof coating layer; The protective layer is made of aluminum foil, fiberglass cloth or steel plate with the same width as the expansion joint.

2. The coal conveyor belt bridge deformation joint according to claim 1, characterized in that: The thickness of the bottom layer is 3 mm, and the construction includes the following steps: applying a layer of LEAC acrylic polymer cement waterproof coating on the original polyester fiber reinforced cloth, applying a second layer after the coating is completely dry and forms a film, using a scraper to smooth out the wrinkles along the longitudinal direction of the reinforced cloth, and allowing the coating to penetrate the cloth, and then applying the third and fourth layers in sequence, and after the first and fourth coats are completely dry, apply the second one-coat-four-coat according to the above process.

3. The coal conveyor belt bridge deformation joint according to claim 1, characterized in that: The rubber surface is made of rubber-plastic material with a thermal conductivity far lower than that of reinforced concrete and is a Class B1 flame-retardant material.

4. The coal conveyor belt bridge deformation joint according to claim 1, characterized in that: The thickness of the two-coat eight-coat LEAC acrylic polymer cement waterproof coating layer is 3mm, and the construction includes the following steps: first apply a layer of acrylic polymer cement waterproof coating, and then apply the second layer after the coating is completely dry and film-formed, and immediately lay the LEAC special reinforced cloth while it is wet, use a scraper to comb the wrinkles along the longitudinal direction of the reinforced cloth, and allow the coating to penetrate the cloth, and then apply the third and fourth layers in turn, and after the one-coat four-coat is completely dry, do the second one-coat four-coat according to the above process.

5. The coal conveyor belt bridge deformation joint according to claim 1, characterized in that: For deformation joints with large deformation capacity, anchor bolts need to be added to fix the waterproof layer.

6. The coal conveyor belt bridge deformation joint according to claim 1, characterized in that: When the width of the deformation joint is ≤50mm, the protective layer is made of aluminum foil fiberglass cloth with the same width as the deformation joint; when the width of the deformation joint is greater than 50mm, the protective layer is made of steel plate.

7. A method for constructing a deformation joint of a coal conveyor belt trestle as claimed in any one of claims 1 to 6, characterized in that: The steps include: S1. Laying the base layer Apply a layer of LEAC acrylic polymer cement waterproof coating on the virgin polyester fiber reinforced cloth, and apply a second layer after the coating is completely dry and forms a film. Use a scraper to smooth the wrinkles along the longitudinal direction of the reinforced cloth and allow the coating to penetrate the cloth. Then apply the third and fourth layers in sequence. After one coat and four coats are completely dry, apply another one coat and four coats according to the above process to obtain a U-shaped pocket made of two coats and eight coats of LEAC acrylic polymer cement waterproof coating impregnated with virgin polyester fiber reinforced cloth; S2. Laying insulation layer Fill the deformation joint with rubber surface, and pour waterproof coating emulsion into the gap between the rubber surface and the deformation joint, and wait for the waterproof coating emulsion to dry to obtain the insulation layer; S3. Laying waterproof layer First, apply a layer of LEAC acrylic polymer cement waterproof coating on the thermal insulation layer, and then apply a second layer after the coating is completely dry and forms a film, and then apply the third layer and the fourth layer in sequence, and after the first coat and four coats are completely dry, apply a second one coat and four coats according to the above process to obtain two coats and eight coats of LEAC acrylic polymer cement waterproof coating layer, and then pour LEAC waterproof emulsion on the two coats and eight coats of LEAC acrylic polymer cement waterproof coating layer, and wait for the LEAC waterproof emulsion to be completely dry to obtain a waterproof layer; S4. Laying protective layer Lay aluminum foil fiberglass cloth or steel plate with the same width as the expansion joint on the waterproof layer.

8. A method for constructing a deformation joint of a coal conveyor belt trestle as claimed in claim 7, characterized in that: In step S3, for deformation joints with large deformation capacity, anchor bolts are used to fix the waterproof layer, and water-based anti-rust paint is applied on the surface of the bolts with a thickness of not less than 200 μm. After the paint is dry, it is applied three times with a thickness of 1.0mm BY01 water-based thick low-treatment anti-corrosion paint is used for anti-corrosion.

9. A method for constructing a deformation joint of a coal conveyor belt trestle as claimed in claim 7, characterized in that: In the step S4, when the width of the deformation joint is greater than 50 mm, a steel plate is selected for covering, and a water-based anti-rust paint with a thickness of not less than 200 μm is applied to the surface of the steel plate. After the paint is dry, the paint is applied three times with a thickness of 1.0mm BY01 water-based thick low-treatment anti-corrosion paint is used for anti-corrosion.

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