Floating type mesh belt tensioning device for mesh belt type thermal cracking furnace

Abstract

The utility model discloses a floating type mesh belt tensioning device for a mesh belt type thermal cracking furnace, and relates to the technical field of thermal cracking of solid wastes (hereinafter referred to as' solid wastes'). Comprising a compression roller, two U-shaped guide grooves, two sealing devices and two counterweight devices. According to the floating type mesh belt tensioning device, when the length of the mesh belt is changed due to the change of the furnace temperature, the tensioning force of the mesh belt does not change, so that the pressure between the mesh belt and the driving roller is constant. When the driving roller rotates, friction is generated due to the trend of relative movement between the driving roller and the mesh belt, and under the action of two factors of constant pressure and friction, the generated tension on the mesh belt is constant. Therefore, the floating type mesh belt tensioning device ensures that the mesh belt conveying system in the cracking furnace can operate safely and stably, and the reliability of mesh belt type cracking furnace equipment in the working process is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to solid waste thermal cracking technical field, specifically relates to a floating type mesh belt tensioning device for mesh belt type thermal cracking furnace, prevent because mesh belt thermal expansion and become long, make mesh belt tensioning force reduce, lead to mesh belt and drive roll pressure reduce, cooperation slack, can't produce enough pulling force to drag mesh belt movement, prevent mesh belt because furnace temperature drop cooling contraction and become short, lead to mesh belt receive greater tensioning force and lead to mesh belt breakage damage. BACKGROUND

[0002] Solid waste material conveying in mesh belt type solid waste thermal cracking furnace is completed by the operation of mesh belt. The tensioning force generated by the tensioning mesh belt produces pressure between the mesh belt and the drive roll. When the drive roll rotates, friction is generated due to the relative movement between the drive roll and the mesh belt, and under the combined action of pressure and friction, the pulling force to drag the mesh belt to run is generated. Due to the characteristics of high temperature inside the thermal cracking furnace and the closed environment in the furnace not connected with the outside atmosphere, the tensioning of the solid waste material conveying mesh belt in the furnace has particularity, and the mesh belt tensioning implementation mechanism is in a high temperature working environment in the cracking furnace. Therefore, the conventional mesh belt tensioning scheme is difficult to implement.

[0003] At present, the mesh belt tensioning device of the commonly used mesh belt type solid waste thermal cracking furnace is a pre-tightening system, that is, an external force is applied in advance to adjust the position of the drive roll, so that the mesh belt is first tensioned under the action of the external force, a tensioning force is generated, and thus pressure is generated between the mesh belt and the drive roll. When the drive roll rotates, the pulling force to drag the mesh belt to move is generated under the action of pressure and friction. In the high temperature environment in the cracking furnace, as the temperature changes, when the temperature rises, the mesh belt expands and becomes longer in the cracking furnace, resulting in a decrease in the tensioning force of the mesh belt, and the pressure on the contact surface between the mesh belt and the drive roll also decreases. When the pressure decreases to a certain extent, the pulling force to the mesh belt generated by the pressure and friction between the mesh belt and the drive roll is not enough to drive the mesh belt, and the mesh belt and the drive roll will slip, so that the mesh belt cannot run normally. On the contrary, when the temperature in the cracking furnace decreases, the mesh belt shrinks due to cooling, becomes shorter, and the tensioning force on the mesh belt in the pre-tightening state gradually increases, and when the tensioning force is large enough, the mesh belt will be broken and damaged. The above situations will affect the safe and stable conveying of solid waste materials in the furnace.

[0004] In order to avoid the above situations, it is necessary to design a new floating type mesh belt tensioning device. UTILITY MODEL CONTENTS

[0005] The utility model discloses a kind of floating net belt tensioning devices for mesh belt pyrolysis furnace, with a constant force always acting on net belt, so that the tensioning force of net belt is invariable. When the temperature in the pyrolysis furnace changes, the size of this constant force is invariable, and only the position of constant force acting on net belt floats up and down with the lengthening or shortening of net belt. Therefore, the tensioning force of net belt is also invariable, and the pressure of interaction between net belt and driving roller will not change. Therefore, the pulling force of dragging net belt movement caused by the pressure and friction between net belt and driving roller is also invariable, thereby solving the problems generated in the current net belt operation.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of floating net belt tensioning devices for mesh belt pyrolysis furnace, comprising: 1 pressure roller (1), two "U" type guide slots (2), two sealing devices (3), two counterweight devices (4). In this tensioning device, pressure roller (1) is placed on net belt, two counterweight devices (4) are hung at the two ends of pressure roller (1) respectively, and extend to the bottom of pyrolysis furnace through two sealing devices (3). Two "U" type guide slots (2) are installed on the two sides of corresponding furnace lining at the two ends of pressure roller (1).

[0007] As preferred in the utility model, the pressure roller (1) has four parts, which are pressure roller floating surface (1-1), two net belt retaining rings (1-2), two counterweight retaining rings (1-3) and two small shafts (1-4).

[0008] As preferred in the utility model, the two "U" type guide slots (2) have a "U" type cross section, and are installed on the two sides of corresponding furnace lining at the two ends of pressure roller (1).

[0009] As preferred in the utility model, the two sealing devices (3) have the following components: first steel plate (3-1), sealing gasket (3-2), second steel plate (3-3), steel pipe (3-4), third steel plate (3-5), sealing packing (3-6), compression gasket (3-7), locking member (3-8) and screw (3-9).

[0010] As the utility model is preferred, two counterweight devices (4), counterweight device (4) is by "C" type pendant (4-1), connecting block (4-2), flexible chain (4-3), boom (4-4), a plurality of counterweight blocks (4-5), two connecting chain plates (4-6), counterweight block placing plate (4-7), a plurality of nuts (4-8) are composed, "C" type pendant (4-1) is connected together with connecting chain plate (4-6) of connecting block (4-2), the lower surface of connecting block (4-2) is suspended and is flexible chain (4-3), boom (4-4), a plurality of counterweight blocks (4-5) are placed on counterweight block placing plate (4-7), a plurality of nuts (4-8) are screwed into the threaded section portion below boom (4-4), and counterweight block placing plate (4-7) and a plurality of nuts (4-8) jointly bear the weight of a plurality of counterweight blocks (4-5).

[0011] Compared with the prior art, the utility model has the beneficial effects as follows:

[0012] The utility model discloses a kind of floating net belt tensioning device for net belt type pyrolysis furnace, and the implementation can work in high temperature environment in pyrolysis furnace.In the process of cracking furnace work, although the temperature in furnace changes, the length of net belt changes due to thermal expansion and contraction, but this change is just to make the position of the external force of net belt tensioning force up and down floating, the size of this external force does not change, then the size of the tensioning force generated by the external force of net belt tensioning is also not changed.Therefore, the pressure of the contact surface of net belt and driving roller is constant, the tension of net belt caused by pressure and friction between net belt and driving roller is not changed, and net belt can still operate normally.The solid waste conveying system in pyrolysis furnace can work safely and stably when furnace temperature fluctuates, and the reliability of cracking furnace equipment in working process is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model will be described in detail in connection with the drawings and specific embodiments.

[0014] Figure 1 Structure schematic diagram of floating net belt tensioning device of net belt type pyrolysis furnace

[0015] Figure 2 For "A-A section view schematic diagram in Figure 1 "

[0016] Figure 3 Structure schematic diagram of compression roller

[0017] Figure 4 Installation schematic diagram of "U" type guide groove

[0018] Figure 5 For "K-K section view schematic diagram in Figure 4 "

[0019] Figure 6 Schematic view of the sealing device

[0020] Figure 7 Schematic view of the counterweight device

[0021] Figure 8 For "B-B section view in Figure 7 " is shown schematically DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0023] With reference to Figure 1 and Figure 2 , the specific embodiment adopts the following technical scheme: a floating type mesh belt tensioning device, comprising: one compression roller (1), two "U" type guide grooves (2), two sealing devices (3), and two counterweight devices (4). In the tensioning device, the compression roller (1) is placed on the mesh belt, the two counterweight devices (4) are respectively hung at the two ends of the compression roller (1) and extend to the bottom of the thermal cracking furnace through the two sealing devices (3), the weight of the counterweight device (4) and the weight of the compression roller (1) jointly act vertically on the mesh belt, and the tensioning force of the mesh belt is generated to make the mesh belt tensioned. Due to the tensioning of the mesh belt, the pressure between the mesh belt and the driving roller is generated, and the size of the pressure is only related to the weight of the counterweight device (4) and the weight of the compression roller (1). When the driving roller rotates, there is a tendency of relative movement between the mesh belt and the driving roller, and thus friction is generated. Under the combined action of the pressure and the friction, the tension is generated to drag the movement of the mesh belt. With the change of the temperature in the furnace, the length of the mesh belt changes due to thermal expansion and contraction, the positions where the compression roller (1) and the counterweight device (4) contact the mesh belt float up and down with the mesh belt, but the weight of the compression roller (1) and the weight of the counterweight device (4) are unchanged, that is, the tensioning force received by the mesh belt is unchanged. Therefore, the pressure between the contact surface of the mesh belt and the driving roller is constant, and the tension to drag the movement of the mesh belt is also constant.

[0024] With reference to Figure 1 Figure 2 and Figure 3 , the compression roller (1) is placed on the mesh belt, the floating surface (1-1) of the compression roller contacts the surface of the mesh belt, and the mesh belt is located between the two mesh belt retaining rings (1-2), so that the floating surface (1-1) of the compression roller (1) is always in contact with the surface of the mesh belt and will not slip off.

[0025] With reference to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The small shafts (1-4) at both ends of the compression roller (1) are inserted into the "U" type guide slots (2) in the furnace lining outside the counterweight retainer (1-3), ensuring that the compression roller (1) can only float up and down along the length direction of the "U" type guide slots (2) with the mesh belt, and cannot swing left and right relative to the mesh belt, so that the compression roller (1) can be in good contact with the mesh belt.

[0026] Referring to Figure 6 The sealing device (3) is provided with a sealing packing (3-6) and a compression gasket (3-7), and the locking member (3-8) is locked to make the sealing packing (3-6) deformed by the extrusion of the compression gasket (3-7), thereby blocking the passage between the inside and outside of the cracking furnace and ensuring that the inside and outside of the furnace are not connected.

[0027] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 The two counterweight devices (4) are hung on the parts of the small shafts (1-4) at both ends of the compression roller (1) between the mesh belt retainer (1-2) and the counterweight retainer (1-3), and the hanger rods (4-4) of the counterweight devices (4) extend out of the furnace to the lower part of the hot cracking furnace through the two sealing devices (3).

[0028] Referring to Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8 The threaded sections of the hanger rods (4-4) below the furnace are screwed into a plurality of nuts (4-8), the uppermost nut (4-8) is provided with a counterweight block placing plate (4-7), and a plurality of counterweight blocks (4-5) are placed on the counterweight block placing plate (4-7). The weight of the counterweight device (4) together with the weight of the compression roller (1) forms an external force acting on the mesh belt, so that the mesh belt is tensioned to generate a tensioning force, and the size of the tensioning force only changes with the external force, and does not change with the change of the length of the mesh belt. The size of the external force is the sum of the weight of the compression roller (1) and the weight of the counterweight device (4), which does not change. Therefore, the tensioning force of the mesh belt is constant. When the driving roller rotates, there is a tendency of relative movement between the driving roller and the mesh belt to generate friction, and under the combined action of the constant pressure and friction, the pulling force for driving the mesh belt to run is constant.

[0029] Compared with the tensioning mode of the solid waste material conveying mesh belt in the mesh belt type pyrolysis furnace currently used, the embodiment ensures that the tension of the mesh belt does not change when the length of the mesh belt changes due to the change of the furnace temperature, and the mesh belt does not slip or break, so that the solid waste material conveying in the mesh belt type pyrolysis furnace is more stable and reliable, and the safety and reliability of the mesh belt type pyrolysis furnace during the working process are greatly improved, and the mesh belt type pyrolysis furnace has a wide market application prospect.

[0030] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A floating mesh belt tensioning device for use in a mesh belt pyrolysis furnace, characterized in that, The utility model relates to a kind of tightener, including: 1 pressure roller (1), two "U” type guide slots (2), two sealing devices (3), two counterweight devices (4), in this tightener, pressure roller (1) is placed on mesh belt, two counterweight devices (4) are hung respectively at the both ends of pressure roller (1), and pass through two sealing devices (3) and extend to the below of thermal cracking furnace, two "U” type guide slots (2) are installed in the corresponding two sides of furnace lining at the both ends of pressure roller (1). The pressure roller (1) is composed of four parts, which are: pressure roller floating surface (1-1), two mesh belt retaining rings (1-2), two counterweight retaining rings (1-3) and two small shafts (1-4).

2. A floating mesh belt tensioning device for use in a mesh belt pyrolysis oven as claimed in claim 1, characterized in that The two "U” type guide slots (2) are "U” type in cross section, and are installed in the corresponding two sides of furnace lining at the both ends of pressure roller (1).

3. A floating mesh belt tensioning device for use in a mesh belt pyrolysis oven as claimed in claim 1, wherein The two sealing devices (3) are composed of: first steel plate (3-1), sealing gasket (3-2), second steel plate (3-3), steel pipe (3-4), third steel plate (3-5), sealing packing (3-6), compression gasket (3-7), locking piece (3-8) and screw (3-9).

4. A floating mesh belt tensioning device for use in a mesh belt pyrolysis oven as defined in claim 1, wherein The two counterweight devices (4) are composed of "C” type hanger (4-1), coupling block (4-2), flexible chain (4-3), hanger rod (4-4), several counterweight blocks (4-5), two coupling chain plates (4-6), counterweight block placing plate (4-7) and several nuts (4-8). The "C” type hanger (4-1) and the coupling block (4-2) are connected together by the coupling chain plate (4-6). The flexible chain (4-3) and the hanger rod (4-4) are hung below the coupling block (4-2). The several counterweight blocks (4-5) are placed on the counterweight block placing plate (4-7). The several nuts (4-8) are screwed into the threaded section below the hanger rod (4-4). The counterweight block placing plate (4-7) and the several nuts (4-8) jointly bear the weight of the several counterweight blocks (4-5).

5. A floating mesh belt tensioning device for use in a mesh belt pyrolysis oven as defined in claim 1, wherein ​

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