Elbow pressing and fastening device

Abstract

The utility model discloses an elbow pressing and fastening device, which relates to the technical field of blast furnace ironmaking equipment and comprises a fin plate fixedly mounted on an elbow and a tension device with one end rotatably connected to a furnace shell and the other end clamped on the fin plate. A U-shaped bayonet is formed in the end, away from the bent pipe, of the fin plate, the tensioning device comprises a screw clamped in the U-shaped bayonet of the fin plate and a fastening mechanism in threaded connection with the screw, one end of the screw is rotationally connected with the furnace shell, the other end of the screw penetrates through the U-shaped bayonet of the fin plate to be provided with the fastening mechanism used for pressing the fin plate, and a return preventing structure is arranged on the fastening mechanism; the air inlet device has the advantages that the anti-return structure is arranged, loosening of the screwing nut caused by displacement deformation in a high-temperature environment is avoided, and air leakage at the sealing position of the front end of the air inlet device and the small tuyere sleeve is also avoided; and grease can be injected at regular intervals for lubrication and maintenance through the lubricating opening, so that the thread is smoother in the mounting and dismounting process, thread abrasion can be reduced while thread corrosion is avoided, the fastening effect is improved, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of blast furnace ironmaking equipment, and in particular to a bending pipe clamping and fastening device. Background Technology

[0002] The bend clamping device is typically installed on both sides of the bend in the blast furnace air intake system. It securely fixes the bend to the blast furnace shell, achieving a seal between the front end of the air intake system and the spherical surface of the tuyeres. Currently, this device requires manual hammering during installation to achieve the desired tightening effect, which is time-consuming and labor-intensive. The hammering cannot guarantee appropriate force and frequency, and excessive hammering can cause deformation or breakage of the device; it also cannot ensure consistent tightening force on both sides, leading to loosening or detachment of the clamping device during use, thus affecting the normal operation of the blast furnace.

[0003] The current manual hammering installation method is inefficient. As blast furnaces become increasingly larger, more clamping devices will be required, typically around 60 to 80 for medium and large blast furnaces. This installation method significantly increases operator fatigue and prolongs equipment maintenance time. Therefore, designing an improved bent-tube clamping device is imperative. Utility Model Content

[0004] The purpose of this invention is to provide a pipe bending and clamping device to solve the above-mentioned problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A bend pipe clamping and fastening device includes a fin plate fixedly installed on the bend pipe and a tensioning device with one end rotatably connected to the furnace shell and the other end clamped on the fin plate; the fin plate has a U-shaped bayonet at the end away from the bend pipe, the tensioning device includes a screw rod clamped in the U-shaped bayonet of the fin plate and a fastening mechanism threadedly connected to the screw rod, one end of the screw rod is rotatably connected to the furnace shell, and the other end passes through the U-shaped bayonet of the fin plate to clamp the fin plate, and the fastening mechanism is provided with an anti-reverse structure.

[0007] Preferably, the fastening mechanism includes a tightening nut, a positioning ring, a compression spring, a convex ring, and a concave washer. The tightening nut is provided with a positioning ring and a convex ring on the side near the fin. A compression spring is provided between the positioning ring and the convex ring. A concave washer is provided between the convex ring and the fin. The tightening nut, the positioning ring, the compression spring, the convex ring, and the concave washer are all fitted onto the screw. The tightening nut is connected to the screw by a thread.

[0008] Preferably, the external thread of the screw is a trapezoidal thread, and the tightening nut is provided with an anti-return mechanism to prevent it from getting stuck in the trapezoidal thread of the screw, which can achieve the locking of the tightening nut.

[0009] Preferably, the anti-return structure includes a sleeve, which is fixedly installed on the tightening nut. A tension spring is provided inside the sleeve near the tightening nut, and a movable shaft is inserted inside the tension spring. A handle is fixedly installed at one end of the movable shaft away from the tightening nut, and a steel ball is built into the other end. The end of the tension spring near the handle is fixedly connected to the sleeve, and the other end is fixedly connected to the movable shaft. A positioning pin is fixedly installed on the upper part of the movable shaft, and the positioning pin extends out of the side of the movable shaft. A U-shaped notch is provided at the upper end of the sleeve. When the positioning pin moves into the U-shaped notch of the sleeve, the steel ball end of the movable shaft extends into the tightening nut. When the positioning pin is locked at the end of the sleeve, the steel ball end of the movable shaft is pulled into the sleeve.

[0010] Preferably, the side of the tightening nut is provided with a lubrication port for adding grease, and the lubrication port is plugged with a pressure injection cup.

[0011] Preferably, the end of the tightening nut furthest from the fin is connected to an extension fastening rod via a hexagonal fit.

[0012] Preferably, the screw is connected to the furnace shell via a universal joint.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. Because of the extension fastening rod, tools such as pneumatic hammers can be used to replace manual hammering, which reduces the physical burden on workers during installation, reduces installation time, improves work efficiency, and ensures uniformity and consistency of fastening.

[0015] 2. An anti-backflow device is installed, which can effectively prevent the tightening nut from loosening due to displacement and deformation under high temperature environment, and prevent air leakage at the sealing position between the front end of the air inlet device and the small sleeve of the air outlet.

[0016] 3. A lubrication port is provided, which can be injected with grease or other lubricants regularly for maintenance, making the threads smoother during installation and disassembly, preventing thread corrosion and reducing thread wear, thereby improving its fastening effect and service life. Attached Figure Description

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is a left-side structural schematic diagram of the bending pipe clamping and fastening device described in this utility model.

[0019] Figure 2 This is a top view of the pipe bending and clamping device described in this utility model.

[0020] Figure 3 This is a schematic diagram of the tightening nut of the pipe bending and clamping device described in this utility model.

[0021] Figure 4 This is a front view structural schematic diagram of the extension fastening rod of the bending pipe clamping fastening device described in this utility model.

[0022] Figure 5 This is a left-side view of the extended fastening rod of the bending pipe clamping fastening device described in this utility model.

[0023] Figure 6 This is a right-side structural schematic diagram of the extension fastening rod of the bending pipe clamping fastening device described in this utility model.

[0024] The annotations in the attached figures are explained as follows:

[0025] 1. Tightening nut; 2. Positioning ring; 3. Compression spring; 4. Convex ring; 5. Concave pad; 6. Screw; 7. Pin; 8. Cotter pin; 9. Reversing adjustment seat; 10. Fastening seat; 11. Extension fastening rod; 12. Furnace shell; 13. Bend; 131. Fin plate; 15. Anti-reverse structure; 31. Handle; 32. Positioning pin; 33. Sleeve; 34. Tension spring; 35. Movable shaft; 36. Steel ball; 37. Oil injection cup. Detailed Implementation

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., 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. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] like Figures 1-6 As shown, a bend pipe clamping and fastening device includes a fin plate 131 fixedly installed on the bend pipe 13 and a tensioning device with one end rotatably connected to the furnace shell 12 and the other end clamped on the fin plate 131; the fin plate 131 is provided with a U-shaped bayonet at the end away from the bend pipe 13; the tensioning device includes a screw 6 clamped in the U-shaped bayonet of the fin plate 131 and a fastening mechanism threadedly connected to the screw 6; one end of the screw 6 is rotatably connected to the furnace shell 12, and the other end passes through the U-shaped bayonet of the fin plate 131 to provide a fastening mechanism for clamping the fin plate 131; the fastening mechanism is provided with an anti-reverse structure 15.

[0030] The fastening mechanism includes a tightening nut 1, a positioning ring 2, a compression spring, a convex ring 4, and a concave washer 5. The positioning ring 2 and the convex ring 4 are located on the side of the tightening nut 1 near the fin 131. A compression spring is located between the positioning ring 2 and the convex ring 4. A concave washer 5 is located between the convex ring 4 and the fin 131. The tightening nut 1, the positioning ring 2, the compression spring, the convex ring 4, and the concave washer 5 are all fitted onto the screw 6. The tightening nut 1 and the screw 6 are connected by threads. When the tightening screw rotates, the convex ring 4 and the concave washer 5 rotate due to the friction of the spherical surface, buffering the reaction force when the spring is compressed.

[0031] The external thread of the screw 6 is a trapezoidal thread. The inner surface of the tightening nut 1 is provided with an internal thread that matches the trapezoidal external thread of the screw 6. The tightening nut 1 is provided with an anti-return mechanism that can be locked in the trapezoidal thread of the screw 6 to achieve the locking of the tightening nut 1, which is used to prevent the tightening nut 1 from loosening due to displacement deformation under high temperature environment.

[0032] The anti-return structure 15 includes a sleeve 33, which is fixedly installed on the tightening nut 1. A tension spring 34 is provided inside the sleeve 33 near the tightening nut 1. A movable shaft 35 is inserted into the tension spring 34. A handle 31 is fixedly installed at one end of the movable shaft 35 away from the tightening nut 1, and a steel ball 36 is built into the other end. The end of the tension spring 34 near the handle 31 is fixedly connected to the sleeve 33, and the other end is fixedly connected to the movable shaft 35. A positioning pin 32 is fixedly installed on the upper part of the movable shaft 35. The positioning pin 32 extends out of the side of the movable shaft 35. A U-shaped notch is provided at the upper end of the sleeve 33. When the positioning pin 32 moves into the U-shaped notch of the sleeve 33, the steel ball end of the movable shaft 35 extends into the tightening nut 1, and the steel ball 36 is stuck in the trapezoidal thread of the screw 6 to achieve a locking function. When the positioning pin 32 is stuck at the end of the sleeve 33, the steel ball end of the movable shaft 35 is pulled into the sleeve 33.

[0033] The side of the tightening nut 1 has a lubrication port for adding grease, which is used to periodically inject grease for lubrication maintenance. The lubrication port is plugged with a pressure injection cup 37.

[0034] The end of the tightened nut 1 away from the fin 131 is connected to an extension fastening rod 11 via a hexagonal fit, which is used to extend the operating space. The extension fastening rod 11 can be used with a pneumatic hammer, and the extension fastening rod 11 can be rotated by the pneumatic hammer to replace manual hammering.

[0035] The screw 6 is connected to the furnace shell 12 via a universal joint, which allows the bent pipe 13 to swing in four directions (up, down, left, and right) after the fastening device is fixed to the furnace shell 12, ensuring free installation and disassembly.

[0036] Working principle: When in use, insert one end of the bent pipe 13 into the furnace shell 12, and lock the tensioning device onto the fin 131 of the bent pipe 13. By rotating the tightening nut 1 or rotating the extension fastening rod 11 with a pneumatic blower, the compression spring compresses the concave pad 5 to tighten the fin 131, thereby fixing and tightening the bent pipe 13. Rotate the handle 31 of the anti-reverse structure 15 to rotate the positioning pin 32 to the U-shaped notch position of the sleeve 33. Press down the handle 31, and the steel ball 36 at the end of the movable shaft 35 is locked into the trapezoidal thread of the screw 6, thereby achieving the locking function. Lubrication and maintenance can be performed periodically by adding grease through the filling port on the tightening nut 1. During use, the pressure oil cup 37 can be used for plugging.

[0037] The foregoing has shown and described the basic principles, main features and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A pipe bending clamping and fastening device, comprising a fin (131) fixedly installed on a pipe bending (13) and a tensioning device having one end rotatably connected to a furnace shell (12) and the other end clamped to the fin (131); characterized in that: The fin plate (131) is provided with a U-shaped bayonet at one end away from the bend (13). The tensioning device includes a screw (6) that is locked in the U-shaped bayonet of the fin plate (131) and a fastening mechanism threadedly connected to the screw (6). One end of the screw (6) is rotatably connected to the furnace shell (12), and the other end passes through the U-shaped bayonet of the fin plate (131) to provide a fastening mechanism for pressing the fin plate (131). The fastening mechanism is provided with an anti-reverse structure (15).

2. The pipe bending and clamping device according to claim 1, characterized in that: The fastening mechanism includes a tightening nut (1), a positioning ring (2), a compression spring, a convex ring (4), and a concave pad (5). The tightening nut (1) is provided with a positioning ring (2) and a convex ring (4) on the side near the fin (131). A compression spring is provided between the positioning ring (2) and the convex ring (4). A concave pad (5) is provided between the convex ring (4) and the fin (131). The tightening nut (1), the positioning ring (2), the compression spring, the convex ring (4), and the concave pad (5) are all sleeved on the screw (6). The tightening nut (1) and the screw (6) are connected by threads.

3. The pipe bending and clamping device according to claim 2, characterized in that: The external thread of the screw (6) is a trapezoidal thread. The tightening nut (1) is provided with a mechanism to prevent the return mechanism from getting stuck in the trapezoidal thread of the screw (6), which can realize the locking of the tightening nut (1).

4. The pipe bending and clamping device according to claim 2, characterized in that: The anti-return structure (15) includes a sleeve (33), which is fixedly installed on the tightening nut (1). A tension spring (34) is provided inside the sleeve (33) near the tightening nut (1). A movable shaft (35) is inserted into the tension spring (34). A handle (31) is fixedly installed at one end of the movable shaft (35) away from the tightening nut (1), and a steel ball (36) is built into the other end. The end of the tension spring (34) near the handle (31) is fixedly connected to the sleeve (33). The other end is fixedly connected to the movable shaft (35); a positioning pin (32) is fixedly installed on the upper part of the movable shaft (35), the positioning pin (32) extends out of the side of the movable shaft (35), the upper end of the sleeve (33) is provided with a U-shaped notch, when the positioning pin (32) moves into the U-shaped notch of the sleeve (33), the ball end of the movable shaft (35) extends into the tightening nut (1), when the positioning pin (32) is stuck at the end of the sleeve (33), the ball end of the movable shaft (35) is pulled into the sleeve (33).

5. The pipe bending and clamping device according to claim 2, characterized in that: The tightening nut (1) has a lubrication port on its side for adding grease, and the lubrication port is blocked by a pressure injection cup (37).

6. The pipe bending and clamping device according to claim 2, characterized in that: The end of the tightening nut (1) away from the fin (131) is connected to an extension fastening rod (11) via a hexagonal fit.

7. The pipe bending and clamping device according to claim 1, characterized in that: The screw (6) is connected to the furnace shell (12) via a universal joint.

Images