Clamp device for coating steel pipe at high temperature
By using a refractory casting structure and a steel fiber reinforced clamping device, the problems of rapid heat transfer, short lifespan, and significant safety hazards of existing clamps in the production of high-temperature coated steel pipes have been solved, achieving an efficient and safe production process.
Patent Information
- Application Number
- CN202423077782.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing end cap clamps have problems such as rapid heat transfer, high surface temperature, short service life and great safety hazards in the production of high-temperature coated steel pipes. In particular, they are easily affected by thermal shock in high-temperature environments, which can lead to clamp damage and scrapping of coated steel pipes.
The structure uses refractory castable structural materials such as corundum mullite, combined with steel fibers to enhance its thermal shock resistance. It also features a low thermal conductivity design to reduce heat transfer, a gap in contact with the coated steel pipe to avoid adhesion, and stainless steel set bolts to ensure a secure connection.
It effectively reduces the surface temperature of the fixture, extends its service life, improves production safety and efficiency, reduces production costs, prevents the coated steel pipe from sticking to the fixture, and ensures production stability.
Smart Images
Figure CN223688456U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to steel pipe processing technical field more specifically, the utility model relates to a kind of clamp device for high-temperature coated steel pipe. BACKGROUND
[0002] Coated steel pipe exhibits extensive application value in water supply and drainage system, fire protection system, chemical field and industrial application etc. due to its excellent mechanical properties and corrosion resistance. According to different use environment and demand, the type of coated steel pipe is also rich and varied, including plastic coated steel pipe, metal coated steel pipe and ceramic coated steel pipe etc. In the production process of metal coated steel pipe, cold forming method, hot forming method, centrifugal casting method and centrifugal aluminum hot method etc. are important manufacturing means. Among them, centrifugal aluminum hot method realizes efficient intermetallic compound through the ingenious combination of aluminum hot reaction and centrifugal casting technology. Aluminum hot reaction utilizes the rapid reaction of aluminum powder and metal oxide, instantaneously releases huge heat, reduces metal oxide to metal element and forms liquid metal. And centrifugal casting utilizes the centrifugal force of high-temperature liquid metal in rotating mold, ensures uniform distribution of liquid metal in mold inner wall, so as to form tightly combined composite layer, which ensures the formation of intermetallic metallurgical bonding interface.
[0003] However, a large amount of heat released by aluminum hot reaction will rapidly increase the temperature of steel pipe, causing serious thermal shock problem. In the lining coating process of coated steel pipe, a layer of high-combustion-value metal composite powder is uniformly filled in the inside of steel pipe. With the combustion of powder and high-speed rotation of steel pipe, metal composite powder gradually liquefies and uniformly adheres to the inner wall of steel pipe, forming coated lining. In this process, the combustion of metal composite powder generates a large amount of heat, which makes the temperature of steel pipe inside rise sharply to about 1500°C. In order to ensure that heat is not lost and coated powder is not thrown out, end cap clamp needs to be installed at both ends of steel pipe. However, due to the sharp increase of temperature in the inside of steel pipe, clamp will be seriously affected by thermal shock.
[0004] The existing end cap clamp, such as Figure 1As shown, the clamp is composed of a fixing bolt, a baffle 10 and a clamp body 20, the clamp is fixed on the steel pipe through the fixing bolt, and the front end of the steel pipe is close to one side of the baffle. The clamp and the baffle are both provided with a center hole as a lead channel for igniting the metal composite powder. However, the material of the clamp and the baffle is QT350, and the thermal conductivity is relatively high, which leads to the rapid heat transfer to the outer surface of the clamp, and the temperature rises sharply. After the coating is completed, the temperature of the outer surface of the clamp can reach about 400°C, and the clamp can be used again after artificial water cooling, which not only reduces the production efficiency, but also increases the production cost. At the same time, high temperature also brings great safety hazards. In addition, due to the sharp change of the temperature of the steel pipe during the coating process, the clamp will be subjected to thermal shock, and the thermal shock resistance of the QT350 material is poor, so that the clamp may appear cracks, peeling and other phenomena after being used for 2-4 times, resulting in scrap. More seriously, in the process of high-speed rotation of the steel pipe, the liquid metal composite powder may overflow from the end, and since the clamp and the steel pipe are both metal materials, the two are easy to adhere together, which finally leads to the scrap of the coated steel pipe. Content of the utility model
[0005] The purpose of the utility model is to provide a clamp device for high-temperature coated steel pipe, the thermal conductivity of the refractory cast structure is particularly low, so that the heat transfer of the coated steel pipe during the combustion of the metal composite powder can be greatly reduced, the temperature transferred to the shell is about 40°C, so the device does not need to be water-cooled, and can directly enter the next production. One end of the refractory cast structure has a certain gap with the coated steel pipe, this method not only makes the device easily sleeved on the coated steel pipe, reduces the heat transferred to the refractory cast structure, but also solves the different expansion caused by the different linear expansion coefficients of the coated steel pipe and the refractory cast structure, so as to cause interference. Since the other end of the refractory cast structure directly contacts with the coated steel pipe, even if the liquid metal powder overflows, it will not cause the adhesion of the coated steel pipe and the refractory cast structure.
[0006] In order to realize these purposes and other advantages of the utility model, a clamp device for high-temperature coated steel pipe is provided, which comprises:
[0007] A shell comprising an end plate and a sleeve, the end plate is arranged at one end of the sleeve, and a through hole is arranged on the end plate;
[0008] A refractory cast structure which is annular and cast in the sleeve, one end of the refractory cast structure is sleeved on the coated steel pipe, and the inner side wall of the refractory cast structure has a certain gap with the coated steel pipe, the other end of the coated steel pipe abuts against the other end of the refractory cast structure, and the through hole on the end plate is in communication with the other end of the refractory cast structure and the inside of the coated steel pipe;
[0009] A connecting piece which detachably connects the sleeve and the coated steel pipe.
[0010] Preferably, the sleeve of the clamp device for high-temperature coated steel pipe is a cylindrical body.
[0011] Preferably, the sleeve, the refractory pouring structure and the coated steel pipe are coaxially arranged, the inner diameter of one end of the refractory pouring structure is larger than the outer diameter of the coated steel pipe, and the inner diameter of the other end of the refractory pouring structure is smaller than the outer diameter of the coated steel pipe.
[0012] Preferably, the end plate of the clamp device for high-temperature coated steel pipe is circular, and the outer edge thereof is fixedly connected with one end of the sleeve, and the through hole is located at the center of the end plate.
[0013] Preferably, the clamp device for high-temperature coated steel pipe further comprises:
[0014] The cover plate is annular and coaxially arranged with the coated steel pipe, is arranged at the other end of the sleeve, is sleeved on the coated steel pipe, and abuts against the refractory pouring structure, the inner diameter of the cover plate is larger than the outer diameter of the coated steel pipe, and the cover plate and the sleeve are detachably connected.
[0015] Preferably, the other end of the sleeve is provided with a plurality of first connecting plates on the side wall thereof in the circumferential direction of the sleeve, the cover plate is provided with a plurality of second connecting plates in the circumferential direction thereof, one second connecting plate corresponds to one first connecting plate, and each second connecting plate is connected with the corresponding first connecting plate through a connecting bolt.
[0016] Preferably, the connecting piece of the clamp device for high-temperature coated steel pipe is a plurality of tight bolts, the sleeve is provided with a plurality of threaded holes, the threaded holes correspond to the tight bolts one by one, and the plurality of tight bolts abut against the coated steel pipe after passing through the corresponding threaded holes and the refractory pouring structure.
[0017] Preferably, the inner side of the end plate and the inner side wall of the sleeve are both provided with a plurality of anchor nails at intervals, and each anchor nail is anchored in the refractory pouring structure.
[0018] Preferably, the outer side wall of the sleeve of the clamp device for high-temperature coated steel pipe is provided with a handle.
[0019] Preferably, the inner diameter of one end of the refractory pouring structure is 2mm larger than the outer diameter of the coated steel pipe, and the inner diameter of the cover plate is 2mm larger than the outer diameter of the coated steel pipe.
[0020] The utility model at least includes following beneficial effect:
[0021] The utility model discloses a fixture device is fixed on the coating steel pipe through the close -fitted bolt, and the fixture device can rotate with the coating steel pipe at high speed.
[0022] The refractory cast structure is made of corundum mullite material, which has a maximum use temperature of 1600°C and can fully meet the working requirements in high-temperature environment. What is more important is that the thermal conductivity of the material is extremely low, only about 1 / 15 of that of QT350, so that the heat transfer of the coating steel pipe during the combustion of the metal composite powder can be greatly reduced, and the surface temperature of the fixture device can be maintained at a low level. In this way, the production operator only needs to wear heatproof gloves to easily disassemble the device, greatly improving the convenience and safety of operation.
[0023] To further enhance the thermal shock stability of the cast material, steel fibers are added in a proper proportion, which significantly improves the thermal shock resistance of the cast material, prolongs its service life and effectively reduces the production cost.
[0024] In the structural design, the inner diameter of one end of the refractory cast structure is slightly larger than the outer diameter of the coating steel pipe. This design not only facilitates the easy fitting of the sleeve on the coating steel pipe, further reducing heat transfer, but also effectively solves the problem of expansion difference caused by the different linear expansion coefficients of the coating steel pipe and the cast material, avoiding the occurrence of interference. At the same time, since the other end of the refractory cast structure is in direct contact with the coating steel pipe, even if there is liquid metal powder overflow, it can effectively prevent the adhesion between the coating steel pipe and the cast material.
[0025] In addition, a cover plate is designed and installed on one side of the fixture device through connecting bolts. The main function of the cover plate is to prevent water from splashing onto the surface of the cast material, and also plays a role in fixing the cast material to some extent. The sleeve, end plate, connecting plate, handle and other components are made of ordinary carbon steel, while the anchor nails are made of stainless steel to ensure their durability and stability. The shell is mainly used to support the cast material, while the anchor nails play a role in strengthening the fixation of the cast material. In order to facilitate the disassembly and installation of the device by the operator, a handle is specially designed.
[0026] A center hole is provided in the center of the end plate as a channel for the ignition of the metal composite powder. In general, the utility model successfully solves the problems of high surface temperature and short service life of the existing fixture through structural upgrading, and provides a more efficient, stable and safe solution for the production of coating steel pipes.
[0027] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description
[0028] Figure 1 This is a structural schematic diagram of an existing head clamp;
[0029] Figure 2 This is a three-dimensional structural schematic diagram of a clamping device for a high-temperature coated steel pipe according to an embodiment of the present invention;
[0030] Figure 3 This is a cross-sectional schematic diagram of a clamping device for a high-temperature coated steel pipe according to an embodiment of the present invention. Detailed Implementation
[0031] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.
[0032] It should be noted that in the description of this utility model, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0033] like Figure 2 and Figure 3 As shown, this utility model provides a clamping device for high-temperature coated steel pipes, comprising:
[0034] The housing includes an end plate 1 and a sleeve 2. The end plate 1 is disposed at one end of the sleeve 2 and has a through hole 11 thereon.
[0035] The refractory cast structure 3 is annular and is cast in the sleeve 2. One end of the refractory cast structure 3 is sleeved on the coated steel pipe 5, and the inner side wall of the refractory cast structure 3 has a certain gap with the coated steel pipe 5. The coated steel pipe 5 abuts against the other end of the refractory cast structure 3. The through hole 11 on the end plate 1 is in communication with the other end of the refractory cast structure 3 and the inside of the coated steel pipe 5, and forms a channel for the metal composite powder ignition lead. The refractory cast structure 3 is made of refractory material (cast material) and has a service temperature of 20-1600°C. The refractory material can be ceramic or corundum mullite material, which has a maximum service temperature of 1600°C, so as to ensure that it can work normally in a high-temperature environment. Since the thermal conductivity coefficient of the material is particularly low, only about 1 / 15 of that of QT350, the heat transfer of the coated steel pipe 5 during the combustion of the metal composite powder can be greatly reduced, so that the outer surface of the shell is in a relatively low temperature range, and the production operator can directly disassemble the device after wearing heat-resistant gloves. In order to strengthen the thermal shock stability of the cast material, a certain proportion of steel fibers is added to the cast material to increase the thermal shock resistance and improve the service life of the cast material and reduce the production cost. The refractory cast structure 3 has a certain gap between one end and the coated steel pipe 5. This method not only makes the device easily sleeved on the coated steel pipe 5 and reduces the heat transferred to the cast material, but also solves the problem of interference caused by different expansion amounts due to the different linear expansion coefficients of the coated steel pipe 5 and the cast material. Since the other end of the refractory cast structure 3 directly contacts the coated steel pipe 5, even if the liquid metal powder overflows, it will not cause the coated steel pipe 5 to be adhered to the cast material.
[0036] The connecting piece 4 connects the sleeve 2 and the coated steel pipe 5 and is detachably connected with the coated steel pipe 5. The sleeve 2 and the coated steel pipe 5 are firmly connected through the connecting piece.
[0037] The present scheme provides a clamp device for high-temperature coated steel pipes, and the specific implementation is as follows:
[0038] Manufacture and assembly of the shell:
[0039] Manufacture of the sleeve 2 and the end plate 1: first, a high-temperature-resistant and high-strength metal material (such as stainless steel) is selected to make the sleeve 2 and the end plate 1. The end plate 1 is matched with one end of the sleeve 2 and is welded or bolted to one end of the sleeve 2.
[0040] Setting of the through hole 11: a through hole 11 is drilled on the end plate 1. The size of the through hole 11 is determined according to the inner diameter of the coated steel pipe 5, so as to ensure that the through hole 11 is in communication with the inside of the coated steel pipe 5, thereby forming a channel for the metal composite powder ignition lead.
[0041] Manufacture of the refractory cast structure 3:
[0042] Preparation of refractory material: Select ceramic or corundum mullite material as the main material of refractory cast structure 3, which has excellent high temperature resistance and low thermal conductivity.
[0043] Addition of steel fiber: In order to improve the thermal shock stability and thermal shock resistance of refractory cast structure 3, a certain proportion of steel fiber is uniformly added in the refractory material. The length and addition proportion of steel fiber are determined according to actual needs, and the general addition amount is 1%-1.5% of the total weight of refractory material.
[0044] Pouring and curing: Pour the mixed refractory material and steel fiber into the sleeve 2, and ensure that it forms an annular structure. After curing, drying, and reaching the predetermined strength and hardness, it can be put into use. Then, the coated steel pipe 5 is inserted into the refractory cast structure 3, so that the coated steel pipe 5 maintains a certain gap with one end of the refractory cast structure 3, and abuts against the other end of the refractory cast structure 3.
[0045] Installation of connecting piece:
[0046] Selection of connecting piece: According to the diameter and length of the coated steel pipe 5, select appropriate connecting pieces (such as bolts, clamps, etc.) to connect the sleeve 2 and the coated steel pipe 5.
[0047] Connection and fastening: Install the connecting piece between the sleeve 2 and the coated steel pipe 5, and fasten it firmly by bolts or other fastening methods. Ensure that the connecting piece can withstand the working pressure in high temperature environment and maintain the stable connection between the sleeve 2 and the coated steel pipe 5.
[0048] Use and maintenance:
[0049] Use: During the coating process, the clamp device is sleeved on the coated steel pipe 5, and is fixed through the connecting piece.
[0050] Maintenance: After use, the clamp device is taken off from the coated steel pipe 5 by the dismounting function of the connecting piece when it cools down to a safe temperature.
[0051] Through the above specific embodiments, the scheme provides a clamp device for high temperature coated steel pipe, which has simple structure, high temperature resistance, easy disassembly and maintenance. The device not only can effectively reduce the heat transfer in the coating process, reduce the labor intensity and safety risk of production operators, but also can improve the coating quality and production efficiency of the coated steel pipe 5.
[0052] In another scheme, the sleeve 2 of the clamp device for high temperature coated steel pipe is a cylindrical body.
[0053] In another aspect, the fixture device for high-temperature coated steel pipe, wherein one end and the other end of the refractory cast structure 3 are circular, the sleeve 2, the refractory cast structure 3 and the coated steel pipe 5 are coaxially arranged, the inner diameter of one end of the refractory cast structure 3 is larger than the outer diameter of the coated steel pipe 5, and the inner diameter of the other end is smaller than the outer diameter of the coated steel pipe 5.
[0054] In another aspect, the fixture device for high-temperature coated steel pipe, wherein the end plate 1 is circular, and the outer edge thereof is fixedly connected with one end of the sleeve 2, and the through hole 11 is located at the center of the end plate 1.
[0055] In another aspect, the fixture device for high-temperature coated steel pipe, further comprising:
[0056] The cover plate 6 is circular and coaxially arranged with the coated steel pipe 5, is arranged at the other end of the sleeve 2, is sleeved on the coated steel pipe 5, and abuts against the refractory cast structure 3, the inner diameter of the cover plate 6 is larger than the outer diameter of the coated steel pipe 5, and the cover plate 6 is detachably connected with the sleeve 2. The cover plate 6 is arranged at the other end of the sleeve 2, and mainly prevents water from splashing onto the surface of the cast material, and also fixes the cast material to a certain extent.
[0057] In another aspect, the fixture device for high-temperature coated steel pipe, wherein a plurality of first connecting plates are arranged on the side wall of the other end of the sleeve 2 along the circumferential direction of the sleeve 2, a plurality of second connecting plates are arranged on the cover plate 6 along the circumferential direction thereof, one second connecting plate corresponds to one first connecting plate, and each second connecting plate is connected with the corresponding first connecting plate through a connecting bolt 7.
[0058] In another aspect, the fixture device for high-temperature coated steel pipe, wherein the connecting member is a plurality of anchor bolts, a plurality of threaded holes are arranged on the sleeve 2, the threaded holes correspond to the anchor bolts one by one, and the plurality of anchor bolts abut against the coated steel pipe 5 after passing through the corresponding threaded holes and one end of the refractory cast structure 3.
[0059] In another aspect, the fixture device for high-temperature coated steel pipe, wherein a plurality of anchor bolts 8 are arranged on the inner side of the end plate 1 and the inner side wall of the sleeve 2, and each anchor bolt 8 is anchored in the refractory cast structure 3. The sleeve 2, the end plate 1, the connecting plate and the handle are made of ordinary carbon steel, the anchor bolt 8 is made of stainless steel, the shell is mainly used for supporting the cast material, and the anchor bolt 8 strengthens the fixation of the cast material.
[0060] In another aspect, the fixture device for high-temperature coated steel pipe, wherein a handle is arranged on the outer side wall of the sleeve 2, so as to facilitate the disassembly and assembly of the device by the operator.
[0061] In another aspect, the fixture device for high-temperature coated steel pipe, the inner diameter of one end of the refractory cast structure 3 is 2mm larger than the outer diameter of the coated steel pipe 5, and the inner diameter of the cover plate 6 is 2mm larger than the outer diameter of the coated steel pipe 5.
[0062] Embodiment of the fixture device for high-temperature coated steel pipe:
[0063] Example 1
[0064] Shell: First, a cylindrical sleeve is manufactured, made of ordinary carbon steel. At one end of the sleeve, a circular end plate is welded, with a through hole in the center for forming a channel for the metal composite powder ignition lead.
[0065] Refractory cast structure: Then, a high-refractory cast material such as corundum mullite is prepared. Inside the sleeve, an annular refractory cast structure is cast according to the designed size. One end of the refractory cast structure is designed as a circular ring, with an inner diameter slightly larger than the outer diameter of the coated steel pipe (e.g., 2mm larger), so that it can easily fit into the steel pipe. The other end is also designed as a circular ring, but with an inner diameter slightly smaller than the outer diameter of the coated steel pipe, ensuring that the coated steel pipe is tightly in contact with the refractory cast structure. In this way, the refractory cast structure forms a heat shield in the sleeve.
[0066] Connecting piece: In order to firmly connect the sleeve with the coated steel pipe, multiple threaded holes are made on the sleeve, and corresponding number of anchor bolts are provided. These anchor bolts pass through the threaded holes and the refractory cast structure, and are in close contact with the outer wall of the coated steel pipe, and are fixed by tightening the bolts.
[0067] Other details: On the inner side wall of the end plate and the sleeve, multiple anchor nails are evenly welded, which penetrate into the refractory cast structure to enhance the overall integrity and stability of the structure. In addition, on the outer side wall of the sleeve, handles are installed for easy carrying and installation.
[0068] Example 2
[0069] Based on Example 1, the following improvements are added:
[0070] Cover plate and second connecting plate: At the other end of the sleeve, a circular ring-shaped cover plate is installed. The inner diameter of the cover plate is also slightly larger than the outer diameter of the coated steel pipe (e.g., 2mm larger), so that it can easily fit into the steel pipe. The cover plate is in contact with the refractory cast structure. At the same time, multiple second connecting plates are arranged on the cover plate along the circumferential direction.
[0071] First connecting plate and bolt: On the side wall of the other end of the sleeve, a plurality of first connecting plates are arranged in the circumferential direction thereof. These first connecting plates correspond one-to-one to the second connecting plates on the cover plate. Through the connecting bolts, one second connecting plate and one first connecting plate can be firmly connected, thereby realizing the detachable connection of the cover plate and the sleeve.
[0072] Operation and maintenance: In actual operation, the other end of the sleeve is closed by the cover plate and fixed by the connecting bolts, and the entire device is tightened and fixed with the coated steel pipe by the stop bolt, so that the device can rotate at high speed with the coated steel pipe. When the clamp device needs to be removed, only the stop bolt needs to be loosened.
[0073] Through the above embodiment, a clamp device for high-temperature coated steel pipes is manufactured, which has stable structure and excellent heat insulation performance. The device is not only suitable for coating operation in high-temperature environment, but also convenient to operate and maintain.
[0074] Example 3
[0075] As Figures 1 to 3 shown, the utility model provides a kind of clamp device for high-temperature coated steel pipes, and its specific implementation mode is as follows:
[0076] I, the manufacture and assembly of shell
[0077] The sleeve and end plate are made of:
[0078] High-temperature-resistant and high-strength metal materials (such as stainless steel) are selected to manufacture the sleeve and end plate.
[0079] The sleeve is designed as a cylindrical body, which has a diameter larger than the outer diameter of the coated steel pipe, so as to be easily sleeved on the coated steel pipe.
[0080] The end plate is designed as a circle, which has a diameter matching one end of the sleeve, and is fixed at one end of the sleeve by welding or bolt connection.
[0081] The setting of through hole:
[0082] A through hole is drilled in the center position of the end plate, and the size of the through hole is determined according to the inner diameter of the coated steel pipe, so as to ensure that the through hole communicates with the inside of the coated steel pipe and forms a channel for the ignition lead of metal composite powder.
[0083] II, the preparation of refractory pouring structure
[0084] Preparation of refractory material:
[0085] Ceramic or corundum mullite materials are selected as the main materials of the refractory pouring structure, which have excellent high-temperature resistance and low thermal conductivity.
[0086] Addition of steel fibers:
[0087] To improve the thermal shock stability and resistance of the refractory cast structure, a certain proportion of steel fibers is uniformly added to the refractory material.
[0088] The length and addition proportion of steel fibers are determined according to actual needs, and the general addition amount is 1%-1.5% of the total weight of the refractory material.
[0089] Pouring and curing:
[0090] Pour the mixed refractory material and steel fibers into the sleeve and form a ring structure. Cure the refractory cast structure to achieve the desired strength and hardness.
[0091] Insert the coated steel pipe into the refractory cast structure, so that it abuts the other end of the refractory cast structure, while maintaining a certain gap (e.g. 2mm) from the end of the refractory structure to reduce heat transfer and solve the interference problem caused by different linear expansion coefficients.
[0092] III. Installation of connecting parts
[0093] Selection of connecting parts:
[0094] According to the diameter and length of the coated steel pipe, select appropriate connecting parts (such as bolts, clamps, etc.) to connect the sleeve and the coated steel pipe.
[0095] Connection and fastening:
[0096] Install the connecting parts between the sleeve and the coated steel pipe, and firmly connect them through bolts or other fastening methods.
[0097] Ensure that the connecting parts can withstand the working pressure in high temperature environment and maintain the stable connection between the sleeve and the coated steel pipe.
[0098] IV. Addition of other components
[0099] Cover plate:
[0100] Designed as a circular ring, installed at the other end of the sleeve, sleeved on the coated steel pipe, and abutting the refractory cast structure.
[0101] The inner diameter of the cover plate is larger than the outer diameter of the coated steel pipe (e.g. 2mm) to prevent water from splashing onto the surface of the cast material and to fix the cast material.
[0102] The cover plate and the sleeve are detachably connected by connecting bolts, and the sleeve and the cover plate are respectively provided with first and second connecting plates, which are fixed by bolts.
[0103] Anchor nails:
[0104] A plurality of anchor nails are arranged on the inner side wall of the end plate and the sleeve in a spaced manner, and the anchor nails are made of stainless steel.
[0105] The anchor nails are used for reinforcing the fixing of the refractory pouring structure, and improve the stability and durability of the whole.
[0106] Handle:
[0107] The handle is arranged on the outer side wall of the sleeve, so as to facilitate the disassembly and installation of the device by the operator.
[0108] Five, use and maintenance
[0109] Use:
[0110] During the coating process, the clamp device is sleeved on the coated steel pipe, and is fixed through the connecting piece.
[0111] Metal composite powder or other coating materials are injected into the inside of the coated steel pipe through the through hole on the end plate, and the ignition wire is ignited to perform the coating operation.
[0112] Maintenance:
[0113] After use, the clamp device is taken off from the coated steel pipe through the dismounting function or loosening of the connecting piece after the clamp device is cooled to a safe temperature.
[0114] The residues on the surface of the device are cleaned, so that the device can work normally next time.
[0115] Through the above specific embodiments, the clamp device for the high-temperature coated steel pipe provided by the utility model has simple structure, high temperature resistance, easy disassembly and maintenance. The device not only can effectively reduce the heat transfer during the coating process, reduce the labor intensity and safety risk of the production operator, but also can improve the coating quality and production efficiency of the coated steel pipe.
[0116] Although the embodiments of the utility model have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and it can be fully applied to various fields suitable for the utility model. For those skilled in the art, other modifications can be easily realized, and therefore the utility model is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.
Claims
1. A clamp device for high temperature coated steel pipes, characterized in that, include: The housing includes an end plate and a sleeve, the end plate being disposed at one end of the sleeve and having a through hole thereon; The refractory castable structure is annular and cast inside a sleeve. One end of the refractory castable structure is sleeved on a coated steel pipe, and its inner sidewall has a certain gap with the coated steel pipe. The coated steel pipe abuts against the other end of the refractory castable structure. The through hole on the end plate is connected to the other end of the refractory castable structure and the interior of the coated steel pipe. A connector that detachably connects the sleeve to the coated steel pipe.
2. The fixture apparatus for high temperature coated steel pipe of claim 1, wherein, The sleeve is cylindrical in shape.
3. The fixture apparatus for high temperature coated steel pipe of claim 2, wherein, One end and the other end of the refractory castable structure are both annular. The sleeve, the refractory castable structure and the coated steel pipe are coaxially arranged. The inner diameter of one end of the refractory castable structure is larger than the outer diameter of the coated steel pipe, and the inner diameter of the other end is smaller than the outer diameter of the coated steel pipe.
4. The fixture apparatus for high temperature coated steel pipe of claim 3, wherein, The end plate is circular, and its outer edge is fixedly connected to one end of the sleeve. The through hole is located at the center of the end plate.
5. The fixture apparatus for high temperature coated steel pipe of claim 3, wherein, Also includes: The cover plate is circular and coaxially arranged with the coated steel pipe. The cover plate is located at the other end of the sleeve and is fitted onto the coated steel pipe, abutting against the refractory casting structure. The inner diameter of the cover plate is larger than the outer diameter of the coated steel pipe. The cover plate and the sleeve are detachably connected.
6. The fixture apparatus for high temperature coated steel pipe of claim 5, wherein, Multiple first connecting plates are spaced apart along the circumferential direction on the side wall of the other end of the sleeve, and multiple second connecting plates are spaced apart along the circumferential direction on the cover plate. Each second connecting plate corresponds to a first connecting plate, and each second connecting plate is connected to its corresponding first connecting plate by connecting bolts.
7. The fixture apparatus for high temperature coated steel pipe of claim 1, wherein, The connector consists of multiple set bolts, and the sleeve is provided with multiple threaded holes, each threaded hole corresponding to a set bolt. The multiple set bolts pass through their corresponding threaded holes and refractory casting structure and then abut against the coated steel pipe.
8. The fixture apparatus for high temperature coated steel pipe of claim 1, wherein, Multiple anchoring nails are spaced apart on the inner side of the end plate and the inner side wall of the sleeve, and each anchoring nail is anchored in the refractory cast structure.
9. The fixture apparatus for high temperature coated steel pipe of claim 1, wherein, A handle is provided on the outer wall of the sleeve.
10. The fixture apparatus for high temperature coated steel pipe of claim 5, wherein, The inner diameter of one end of the refractory castable structure is 2mm larger than the outer diameter of the coated steel pipe, and the inner diameter of the cover plate is 2mm larger than the outer diameter of the coated steel pipe.