Insulating blanking pipe nipple
By using high-temperature resistant materials and sealing structures in the short sections of the insulated undercut pipe, the problems of insufficient heat resistance and sealing are solved, and long life and reliable connections are achieved in high-temperature environments.
Patent Information
- Application Number
- CN202422145143.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-09-03
AI Technical Summary
The short sections of the existing insulated cutting pipes have insufficient heat resistance in high temperature environments and have short service life. The connection parts are prone to failure of sealing due to oxidation and moisture, and there is a risk of material leakage and electricity connection.
The upper and lower annular bodies are covered with high-temperature resistant cotton layers, and the intermediate is an amorphous refractory castable material with dense corundum aggregate powder and bonding agent. The annular flange and the semi-annular cover are fixed by bolts to form a sealed annular cover to enhance the connection sealing and heat resistance.
It improves the heat resistance of the short sections of the insulated cutting pipe, extends the service life, reduces the maintenance frequency and cost, enhances the sealing of the connection parts, and avoids material leakage and power connection.
Smart Images
Figure CN223258613U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of insulation connection of discharge pipes of calcium carbide furnaces and ore-fired furnaces, in particular to an insulation discharge pipe short section. Background Art
[0002] Calcium carbide furnaces and submerged arc furnaces, also known as electric arc furnaces or resistance furnaces, are primarily used for reducing and smelting raw materials such as ores, carbonaceous reducing agents, and solvents. The reaction temperatures in these furnaces can reach over 2000°C, which is too high for ordinary refractory materials to withstand.
[0003] Insulated feeding column tubes for calcium carbide furnaces and ore-heat furnaces are mainly used for transporting smelting raw materials. Since the insulating feeding column tubes are made of metal, the inside of the calcium carbide furnace and the ore-heat furnace is in an energized state. In order to prevent electric shock, each connection of the insulating feeding column tube itself needs to use an insulating feeding pipe short section with good insulation as a connecting piece to achieve a fixed connection of the feeding pipe end, thereby ensuring that the calcium carbide raw materials continuously enter the calcium carbide furnace and the ore-heat furnace body through the insulating feeding column tube while achieving current insulation in the calcium carbide furnace and the ore-heat furnace body.
[0004] In the prior art, insulated feed pipe nipples have certain structural design flaws, resulting in numerous problems for use in calcium carbide furnaces and submerged arc furnaces: 1. From a heat-resistant perspective, the overall structure of existing insulated feed pipe nipples has limited tolerance in high-temperature environments, only being able to withstand temperatures of 500°C. However, the reaction temperatures of calcium carbide furnaces and submerged arc furnaces far exceed this range, resulting in a service life of only one to two months. Due to this insufficient heat resistance and short service life, they must be frequently repaired and replaced, increasing both the frequency and cost of repairs and replacements. 2. Regarding the connection structure with the feed pipe, the existing insulated feed pipe nipples are not designed to effectively prevent the effects of water and oxidation, making them susceptible to electrical contact. 3. Due to structural design deficiencies, the connection between the feed pipe column and the feed pipe can fail when exposed to water and oxidation, resulting in poor sealing and the risk of leakage. Based on the technical problems existing in the insulating feed pipe short section in the prior art, the inventor has developed an insulating feed pipe short section for the connection of the feed pipes of calcium carbide furnaces and ore-fired furnaces, which can well solve the above-mentioned technical problems existing in the prior art. Utility Model Content
[0005] The purpose of the utility model is to provide an insulating feed pipe short section to solve the problems raised in the above background technology.
[0006] To achieve the above objectives, the present invention provides the following technical solutions:
[0007] The insulating feed pipe nipple comprises an upper annular body, a lower annular body and an intermediate body; the upper annular body is arranged at the upper position of the intermediate body, and the lower annular body is arranged at the lower position of the intermediate body, and the middle holes running through the upper and lower ends of the upper annular body, the middle hole in the middle body itself along the up-down direction, and the middle holes running through the upper and lower ends of the lower annular body are aligned in the up-down direction; wherein, the upper and lower ends and the outer sides of both the upper annular body and the lower annular body are covered with a high-temperature resistant cotton layer, and the upper end of the upper annular body and the lower end of the lower annular body are both provided with an annular flange; the middle hole of the annular flange itself and the middle hole of the upper annular body itself, as well as the middle hole of the annular flange itself and the middle hole of the lower annular body itself are They are arranged concentrically, and the inner diameter of the center hole of the annular flange itself is not less than the inner diameter of the center hole of the upper annular body and the lower annular body itself; the outer side and lower end of the upper annular body and the outer side and upper end of the annular flange placed above the upper annular body, the outer side and upper end of the lower annular body and the outer side and lower end of the annular flange placed below the lower annular body are all covered by two semi-annular covers; the contact ends of the two semi-annular covers are fixed by a bolt structure and then surrounded to form an annular cover body, the inner diameter of the middle hole passing through the upper and lower ends of the annular cover body is not less than the inner diameter of the center hole of the annular flange itself, and the middle hole passing through the upper and lower ends of the annular cover body and the center hole of the annular flange itself are concentric.
[0008] The upper annular body, the lower annular body and the intermediate body are an integrated structure formed by casting an amorphous refractory castable composed of dense corundum aggregate, powder and binder through a forming mold.
[0009] The inner diameters of the center holes of the upper and lower annular bodies are equal, and the outer diameters of the upper and lower annular bodies are equal; the inner diameter of the intermediate body is equal to the inner diameters of the center holes of the upper and lower annular bodies; the axis passing through the center holes at the upper and lower ends of the upper annular body, the axis of the center hole inside the intermediate body itself along the up and down directions, and the axis passing through the center holes at the upper and lower ends of the lower annular body are coaxial in the up and down directions, and the upper and lower ends of the intermediate body itself are fixedly connected to the middle of the lower end of the upper annular body and the middle of the upper end of the lower annular body respectively.
[0010] The outer dimensions of the annular flange placed above the upper annular body and the inner diameter of the hole in the annular flange are the same as the outer dimensions of the annular flange placed below the lower annular body and the inner diameter of the hole in the annular flange, and the annular flange placed above the upper annular body and the annular flange placed below the lower annular body are aligned in the up and down direction.
[0011] The end faces of the lower end of the upper annular body and the upper end of the lower annular body are both covered with a high-temperature resistant cotton layer, and the coverage range of the high-temperature resistant cotton layer is limited to the outer side of the fixed connection between the lower end face of the upper annular body and the upper end of the intermediate body to the intersection edge of the lower end face of the upper annular body and the outer side face of the upper annular body, and the outer side of the fixed connection between the upper end face of the lower annular body and the lower end of the intermediate body to the intersection edge of the upper end face of the lower annular body and the outer side face of the lower annular body.
[0012] The upper end of the upper annular body and the lower end of the lower annular body are both covered with a high-temperature resistant cotton layer, and the coverage range of the high-temperature resistant cotton layer is limited to the intersection of the upper end face of the upper annular body and the edge of the middle hole of the upper annular body to the intersection of the upper end face of the upper annular body and the outer side surface of the upper annular body, and the intersection of the lower end face of the lower annular body and the edge of the middle hole of the lower annular body to the intersection of the lower end face of the lower annular body and the outer side surface of the lower annular body.
[0013] The semi-annular cover body is a U-shaped steel with a U-shaped cross-section that is bent into a semicircle, and the two ends of the bent U-shaped steel itself are coplanar; the bottom edge of the U-shaped cross-section of the bent U-shaped steel itself is tightly attached to the outer side of the upper circular body or the outer side of the lower circular body; the two folded edges of the U-shaped cross-section of the bent U-shaped steel itself are respectively tightly attached to the lower end of the upper circular body and the upper end of the annular flange located above the upper circular body, or the two folded edges of the U-shaped cross-section of the U-shaped steel itself are respectively tightly attached to the upper end of the lower circular body and the lower end of the annular flange located below the lower circular body.
[0014] The contact ends of the two semi-annular covers are fixed by a bolt structure and then surrounded to form an annular cover, wherein the bolt structure is a bolt connection ear handle provided on the outer side surfaces of both ends of the U-shaped steel after the semi-annular cover itself is bent, and the bolt connection ear handle is provided with a through hole; the two ends of the U-shaped steel after the semi-annular cover itself is bent serve as the contact ends, and after the two semi-annular covers are symmetrically arranged along the left and right, the contact ends of the semi-annular covers themselves are tightly spliced together to form an annular cover; at this time, one end of the screw rod of the bolt itself passes through the through hole on the bolt connection ear handle on the outer side of the U-shaped steel end face of the left annular cover itself in the two semi-annular covers, and the through hole on the bolt connection ear handle on the outer side of the U-shaped steel end face of the right annular cover itself in the two semi-annular covers, and then the end of the screw rod is fitted with a nut and fixed.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] 1. High-temperature resistant cotton layers are set at both ends and the outside of the upper and lower annular bodies to enhance the overall heat resistance, adapt to the high-temperature environment of calcium carbide furnaces and smelting furnaces, extend service life, and reduce the frequency and cost of maintenance and replacement; 2. The connection with the discharge pipe is achieved through an annular flange, and the two semi-annular covers are used to form an annular cover. The contact ends of the semi-annular covers are fixed by a bolt structure, which improves the sealing and protection of the connection parts, effectively avoids water and oxidation, and avoids electrical connection; 3. The middle holes of the upper, lower and intermediate bodies are aligned and coaxial in the up and down directions, and the annular flange is concentric with the middle holes of the upper and lower annular bodies. The middle hole of the annular cover formed by the semi-annular cover is concentric with the middle hole of the annular flange. This structural coordination and the covering effect of the cover enhance the sealing of the connection contact part between the discharge center column tube and the discharge pipe, and reduce the risk of leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural diagram of the utility model;
[0018] Figure 2 This is a schematic diagram of the exploded structure of the utility model;
[0019] In the figure: 1 semi-annular cover; 2 annular flange; 3 intermediate body; 4 bolt structure; 401 bolt; 402 bolt connection ear handle; 5 high temperature resistant cotton layer; 6 upper annular body; 7 lower annular body. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0021] Please refer to the legend. In the embodiment of the present invention, the insulating feed pipe short section includes an upper annular body 6, a lower annular body 7 and an intermediate body 3; the upper annular body 6 is arranged at the upper position of the intermediate body 3, and the lower annular body 7 is arranged at the lower position of the intermediate body 3. The middle holes running through the upper and lower ends of the upper annular body 6, the middle holes in the interior of the intermediate body 3 along the up-down direction, and the middle holes running through the upper and lower ends of the lower annular body 7 are aligned in the up-down direction; wherein, the upper and lower ends and the outer sides of both the upper annular body 6 and the lower annular body 7 are covered with a high-temperature resistant cotton layer 5, and the upper end of the upper annular body 6 and the lower end of the lower annular body 7 are both provided with an annular flange 2; the middle hole of the annular flange 2 itself and the middle hole of the upper annular body 6 itself, as well as the middle hole of the annular flange 2 itself and the lower The holes in the upper annular body 7 are all concentrically arranged, and the inner diameter of the hole in the annular flange 2 itself is not less than the inner diameter of the hole in the upper annular body 6 and the lower annular body 7; the outer side and lower end of the upper annular body 6 and the outer side and upper end of the annular flange 2 placed above the upper annular body 6, the outer side and upper end of the lower annular body 7 and the outer side and lower end of the annular flange 2 placed below the lower annular body 7 are all covered by two semi-annular cover bodies 1; the contact ends of the two semi-annular cover bodies 1 are fixed by a bolt structure 4 and then surrounded to form an annular cover body, the inner diameter of the middle hole passing through the upper and lower ends of the annular cover body is not less than the inner diameter of the hole in the annular flange 2 itself, and the middle hole passing through the upper and lower ends of the annular cover body and the hole in the annular flange 2 itself are concentric.
[0022] The upper annular body 6, the lower annular body 7 and the intermediate body 3 are an integrated structure formed by casting an amorphous refractory castable of dense corundum aggregate, powder and binder through a forming mold.
[0023] Among them, the inner diameters of the center holes of the upper annular body 6 and the lower annular body 7 are equal, and the outer diameters of the upper annular body 6 and the lower annular body 7 are equal; the inner diameter of the intermediate body 3 is equal to the inner diameters of the center holes of the upper annular body 6 and the lower annular body 7; the axis passing through the center holes at the upper and lower ends of the upper annular body 6, the axis of the center hole inside the intermediate body 3 along the up and down directions, and the axis passing through the center holes at the upper and lower ends of the lower annular body 7 are coaxial in the up and down directions, and the upper and lower ends of the intermediate body 3 itself are fixedly connected to the middle of the lower end of the upper annular body 6 and the middle of the upper end of the lower annular body 7 respectively.
[0024] Among them, the outer dimensions and the inner diameter of the hole in the annular flange 2 placed above the upper annular body 6 are the same as the outer dimensions and the inner diameter of the hole in the annular flange 2 placed below the lower annular body 7, and the annular flange 2 placed above the upper annular body 6 is aligned with the annular flange 2 placed below the lower annular body 7 in the up and down direction.
[0025] Among them, the end faces of the lower end of the upper annular body 6 and the upper end of the lower annular body 7 are covered with a high-temperature resistant cotton layer 5, and the coverage range of the high-temperature resistant cotton layer 5 is limited to the outer side of the fixed connection between the lower end face of the upper annular body 6 and the upper end of the intermediate body 3 to the intersection edge of the lower end face of the upper annular body 6 and the outer side face of the upper annular body 6, and the outer side of the fixed connection between the upper end face of the lower annular body 7 and the lower end of the intermediate body 3 to the intersection edge of the upper end face of the lower annular body 7 and the outer side face of the lower annular body 7.
[0026] Among them, the end faces of the upper end of the upper annular body 6 and the lower end of the lower annular body 7 are covered with a high-temperature resistant cotton layer 5, and the coverage range of the high-temperature resistant cotton layer 5 is limited to the intersection of the upper end face of the upper annular body 6 and the edge of the middle hole of the upper annular body 6 to the intersection of the upper end face of the upper annular body 6 and the outer side surface of the upper annular body 6, and the intersection of the lower end face of the lower annular body 7 and the edge of the middle hole of the lower annular body 7 to the intersection of the lower end face of the lower annular body 7 and the outer side surface of the lower annular body 7; the material of the high-temperature resistant cotton layer 5 is asbestos.
[0027] Among them, the semi-annular cover body 1 is a U-shaped steel with a U-shaped cross-section bent into a semicircle, and the two ends of the bent U-shaped steel itself are coplanar; the bottom edge of the U-shaped cross-section of the bent U-shaped steel itself is tightly attached to the outside of the upper circular body 6 or the outside of the lower circular body 7; the two folded edges of the U-shaped cross-section of the bent U-shaped steel itself are respectively tightly attached to the lower end of the upper circular body 6 and the upper end of the annular flange 2 located above the upper circular body 6, or the two folded edges of the U-shaped cross-section of the U-shaped steel itself are respectively tightly attached to the upper end of the lower circular body 7 and the lower end of the annular flange 2 located below the lower circular body 7.
[0028] Among them, the contact ends of the two semi-annular cover bodies 1 are fixed by a bolt structure 4 and then surrounded to form an annular cover body, wherein the bolt structure 4 is a bolt connection ear handle 402 provided on the outer side surfaces of both ends of the U-shaped steel after the semi-annular cover body 1 itself is bent, and the bolt connection ear handle 402 is provided with a through hole; the two ends of the U-shaped steel after the semi-annular cover body 1 itself is bent serve as the contact ends, and after the two semi-annular cover bodies 1 are symmetrically arranged along the left and right, they are tightly spliced together to form an annular cover body; at this time, one end of the screw rod of the bolt 401 itself passes through the through hole on the bolt connection ear handle 402 on the outer side of the U-shaped steel end face of the left annular cover body itself in the two semi-annular cover bodies 1, and the through hole on the bolt connection ear handle 402 on the outer side of the U-shaped steel end face of the right annular cover body itself in the two semi-annular cover bodies 1, and then the end of the screw rod is fitted with a nut and fixed.
[0029] The working principle of the utility model is: the insulating blanking center column tube is mainly used on electric heating furnace bodies such as calcium carbide furnaces and mineral heating furnaces. Its main function is to transport mineralized materials to electric heating furnace bodies such as calcium carbide furnaces and mineral heating furnaces, and to enable the mineralized materials to be electric-melted in the electric heating furnace body using the strong current in the furnace body; the insulating blanking center column tube itself includes a blanking pipe and an insulating blanking pipe short section; the actual connection structure is that the insulating blanking pipe short section is located between the lower end face of the blanking pipe above the insulating blanking center column tube itself and the upper end face of the blanking pipe below the insulating center column tube. In fact, flanges are extended outward along the side surfaces of the upper and lower ends of the blanking pipe itself. The flanges are circular ring plates. The holes in the ring plates of the flanges themselves are mounted on the upper and lower side surfaces of the blanking pipe and fixed. The contact ends of the flanges and the annular covers on the insulating blanking pipe short section are fixed by welding.
[0030] In the insulating blanking center column tube itself, including the blanking tube and the insulating blanking tube short section, the blanking tube is mostly made of conductive metal material, while the insulating blanking short section is mainly cast from amorphous refractory castable that is not conductive and has high temperature resistance and corrosion resistance. The insulating blanking tube short section is located between the connecting end faces of the two blanking tubes, and its purpose is to block conduction; during the normal production and operation of the electric heating furnace body circuit, it is prevented from breaking through the entire insulating blanking tube short section due to excessive current, causing the entire floor connected to the blanking center column tube to be electrified, resulting in a serious equipment accident, which poses a serious safety hazard to the staff.
[0031] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. An insulating feed pipe nipple, comprising an upper annular body, a lower annular body, and an intermediate body; the upper annular body is disposed above the intermediate body, the lower annular body is disposed below the intermediate body, and the middle holes penetrating the upper and lower ends of the upper annular body, the middle hole extending vertically within the intermediate body, and the middle holes penetrating the upper and lower ends of the lower annular body are aligned vertically; the characteristics are: The upper and lower ends and the outer sides of the upper and lower annular bodies are covered with high-temperature resistant cotton layers, and annular flanges are arranged on the upper end of the upper annular body and the lower end of the lower annular body; the center hole of the annular flange itself and the center hole of the upper annular body, as well as the center hole of the annular flange itself and the center hole of the lower annular body are all concentrically arranged, and the inner diameter of the center hole of the annular flange gasket itself is not less than the inner diameter of the center hole of the upper annular body and the lower annular body itself; the outer side and lower end of the upper annular body and the outer side and upper end of the annular flange arranged above the upper annular body, the outer side and upper end of the lower annular body and the outer side and lower end of the annular flange arranged below the lower annular body are all covered by two semi-annular covers; the contact ends of the two semi-annular covers are fixed by a bolt structure and then surrounded to form an annular cover body, the inner diameter of the middle hole passing through the upper and lower ends of the annular cover body is not less than the inner diameter of the center hole of the annular flange itself, and the middle hole passing through the upper and lower ends of the annular cover body and the center hole of the annular flange itself are concentric.
2. The insulating feed pipe nipple according to claim 1, characterized in that: The inner diameters of the middle holes of the upper and lower annular bodies are equal, and the outer diameters of the upper and lower annular bodies are equal; the inner diameter of the lumen of the intermediate body is equal to the inner diameters of the middle holes of the upper and lower annular bodies; the axis running through the middle holes at the upper and lower ends of the upper annular body, the axis of the lumen inside the intermediate body along the vertical direction, and the axis running through the middle holes at the upper and lower ends of the lower annular body are coaxial in the vertical direction, and the upper and lower ends of the intermediate body itself are fixedly connected to the middle of the lower end of the upper annular body and the middle of the upper end of the lower annular body respectively.
3. The insulating feed pipe nipple according to claim 1, characterized in that: The outer dimensions and inner diameter of the hole in the annular flange placed above the upper annular body are the same as the outer dimensions and inner diameter of the hole in the annular flange placed below the lower annular body, and the annular flange placed above the upper annular body is aligned with the annular flange placed below the lower annular body in the up-down direction.
4. The insulating feed pipe nipple according to claim 1, characterized in that: The lower end of the upper circular body and the upper end of the lower circular body are both covered with a high-temperature resistant cotton layer. The coverage of the high-temperature resistant cotton layer is limited to the outer side of the fixed connection between the lower end face of the upper circular body and the upper end of the intermediate body to the intersection edge of the lower end face of the upper circular body and the outer side surface of the upper circular body, and the outer side of the fixed connection between the upper end face of the lower circular body and the lower end of the intermediate body to the upper end face of the lower circular body and the outer side surface of the lower circular body.
5. The insulating feed pipe nipple according to claim 1, characterized in that: The upper end of the upper circular body and the lower end of the lower circular body are both covered with a high-temperature resistant cotton layer. The coverage of the high-temperature resistant cotton layer is limited to the intersection of the upper end face of the upper circular body and the edge of the middle hole of the upper circular body to the intersection of the upper end face of the upper circular body and the outer side surface of the upper circular body, and the intersection of the lower end face of the lower circular body and the edge of the middle hole of the lower circular body to the intersection of the lower end face of the lower circular body and the outer side surface of the lower circular body.
6. The insulating feed pipe nipple according to claim 1, characterized in that: The semi-annular cover body is a U-shaped steel with a U-shaped cross-section bent into a semicircle, and the two ends of the bent U-shaped steel itself are coplanar; the bottom edge of the U-shaped cross-section of the bent U-shaped steel itself is tightly attached to the outer side of the upper circular body or the outer side of the lower circular body; the two folded edges of the U-shaped cross-section of the bent U-shaped steel itself are respectively tightly attached to the lower end of the upper circular body and the upper end of the annular flange located above the upper circular body, or the two folded edges of the U-shaped cross-section of the U-shaped steel itself are respectively tightly attached to the upper end of the lower circular body and the lower end of the annular flange located below the lower circular body.
7. The insulating feed pipe nipple according to claim 1, characterized in that: The contact ends of the two semi-annular covers are fixed by a bolt structure and then enclosed to form an annular cover, wherein the bolt structure is a bolt connection ear handle provided on the outer side surfaces of both ends of the U-shaped steel after the semi-annular cover itself is bent, and the bolt connection ear handle is provided with a through hole; the two ends of the U-shaped steel after the semi-annular cover itself is bent serve as the contact ends, and after the two semi-annular covers are symmetrically arranged along the left and right, the contact ends of the semi-annular covers themselves are tightly spliced to form an annular cover; at this time, one end of the screw rod of the bolt itself passes through the through hole on the bolt connection ear handle on the outer side of the U-shaped steel end face of the left annular cover itself in the two semi-annular covers, and the through hole on the bolt connection ear handle on the outer side of the U-shaped steel end face of the right annular cover itself in the two semi-annular covers, and then the end of the screw rod is fitted with a nut and fixed.