Blind plate for overhauling heat exchanger

Abstract

The utility model discloses a blind plate for heat exchanger maintenance, which relates to the technical field of heat exchanger maintenance and comprises a heat exchanger pipeline and a blind plate, an annular plate is fixedly sleeved on the pipe wall of the heat exchanger pipeline, and two fixing rods are symmetrically and fixedly arranged on the side wall of the annular plate. Connecting plates are rotatably connected to the rod walls of the other ends of the two fixing rods, connecting mechanisms are arranged on the side walls of the two connecting plates, the two connecting plates are connected with a blind plate through the two connecting mechanisms, and two lead screws are symmetrically and rotatably arranged in the blind plate in a sleeving mode; the rod walls of the two lead screws are in threaded connection with inner threaded pipes fixedly connected with the annular plate in a sleeving mode. By means of the blind plate, the leakage heat exchanger can be purged by steam for 12 hours, construction conditions can be met, shutdown time is effectively shortened, shutdown loss is reduced, and meanwhile, the control valve arranged on the pipe wall of the purging pipe can be used for draining water after being opened.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger maintenance, in particular to a blind plate for heat exchanger maintenance. Background Art

[0002] Blind plate, formally known as flange cover, is also called blind flange or pipe plug. It is a flange without a hole in the middle, used to seal the pipe opening. Its function is the same as that of the head and pipe cap, except that the blind plate seal is a detachable sealing device, while the seal of the head is not intended to be opened again.

[0003] During daily production, a leak occurred in the heat exchanger of the reforming distillation system, and the entire distillation system needed to be cut out. During the cut-out process, blind plates were added to the inlet and outlet pipelines and the vent pipeline of the distillation tower to isolate them, and the oil was drained and purged for 72 hours before the construction conditions were met. The whole process took a long time, which seriously affected the normal use of the heat exchanger. Utility Model Content

[0004] In view of the above problems existing in the existing inspection blind plates, the present utility model is proposed.

[0005] Therefore, the utility model aims to provide a blind plate for repairing a heat exchanger, which solves the problem that the entire repair process takes a long time and seriously affects the normal use of the heat exchanger.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A blind plate for overhauling a heat exchanger comprises a heat exchanger pipe and a blind plate, wherein the pipe wall of the heat exchanger pipe is fixedly sleeved with an annular plate, and the side wall of the annular plate is symmetrically fixedly provided with two fixing rods, and the rod walls at the other ends of the two fixing rods are rotatably connected with connecting plates, and the side walls of the two connecting plates are provided with connecting mechanisms and are connected to the blind plate through the two connecting mechanisms, and the interior of the blind plate is symmetrically rotatably sleeved with two screw rods, and the rod walls of the two screw rods are threadedly sleeved with internal threaded pipes fixedly connected to the annular plate, a transmission mechanism is provided between the two screw rods and the two screw rods are connected through the transmission mechanism, and a purge pipe is fixedly sleeved inside the blind plate, and a control valve is provided on the pipe wall of the purge pipe. By utilizing the provided blind plate, the leaking heat exchanger can be steam-purged to meet the construction conditions in 12 hours, thereby effectively shortening the downtime and reducing the downtime loss. At the same time, by utilizing the control valve provided on the pipe wall of the purge pipe, it can be used for drainage after the control valve is opened.

[0008] Preferably, the connecting mechanism includes a connecting rod and a U-shaped plate, the connecting rod is fixedly arranged on the side wall of the corresponding connecting plate and movably connected to the U-shaped plate, the U-shaped plate is fixedly connected to the side wall of the blind plate, and one end of the connecting rod located inside the U-shaped plate is fixedly connected to a baffle, and the baffle can be used to limit the U-shaped plate to prevent the U-shaped plate from separating from the connecting rod.

[0009] Preferably, the transmission mechanism includes a sleeve, a first gear and two second gears, the sleeve is fixedly arranged on one side of the blind plate and movably sleeved with the purge pipe, the first gear is rotatably sleeved on the pipe wall of the sleeve, the two second gears are symmetrically meshed and arranged on both sides of the first gear and are respectively fixedly connected to the ends of the corresponding screw rods, and by utilizing the set first gear and two second gears, the two screw rods can be driven to rotate synchronously during the rotation of the first gear, so that the two screw rods can be threadedly connected with the corresponding internal threaded pipes to achieve fixed installation of the blind plate.

[0010] Preferably, the rod walls of the two fixed rods are movably sleeved with torsion springs, and both ends of each torsion spring are fixedly connected to the side wall of the annular plate and the rod wall of the corresponding fixed rod. By utilizing the provided torsion springs, the corresponding fixed rods can be driven to rotate when not in use, so that the blind plate is rotated to one side of the heat exchanger pipe under the action of the two fixed rods, thereby avoiding affecting the normal use of the heat exchanger.

[0011] Preferably, the rod wall of the connecting rod is movably sleeved with a spring, and the two ends of the spring are respectively fixedly connected to the corresponding U-shaped plate and the side wall of the corresponding baffle. By utilizing the set spring, the corresponding U-shaped plate can be squeezed by the elastic force of the spring, thereby driving the blind plate close to the end of the heat exchanger pipe, and then the ends of the two screw rods can be inserted into the interior of the corresponding internal threaded tube.

[0012] Preferably, two L-shaped handles are symmetrically and fixedly provided on the outer wall of the sleeve. The two L-shaped handles can be used to drive the sleeve to rotate, thereby driving the transmission mechanism.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] The utility model can achieve construction conditions in 12 hours by steam-purging the leaking heat exchanger through the blind plate, effectively shortening the downtime and reducing downtime losses. At the same time, the control valve arranged on the pipe wall of the purge pipe can be used for drainage after the control valve is opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 For the utility model Figure 1 A magnified schematic diagram of part A;

[0018] Figure 3 For the utility model Figure 1 An enlarged schematic diagram of part B.

[0019] Description of reference numerals:

[0020] 1. Heat exchanger pipe; 2. Blind plate; 3. Ring plate; 4. Fixed rod; 5. Connecting plate; 6. Screw rod; 7. Internal threaded pipe; 8. Purge pipe; 9. Control valve; 10. Connecting rod; 11. U-shaped plate; 12. Baffle; 13. Casing; 14. First gear; 15. Second gear; 16. Torsion spring; 17. Spring; 18. L-shaped handle. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] The utility model embodiment discloses a blind plate for repairing a heat exchanger.

[0023] The utility model provides Figure 1-3 The blind plate for overhauling a heat exchanger shown in the figure comprises a heat exchanger pipe 1 and a blind plate 2, the pipe wall of the heat exchanger pipe 1 is fixedly sleeved with an annular plate 3, the side wall of the annular plate 3 is symmetrically fixedly provided with two fixing rods 4, the other end rod walls of the two fixing rods 4 are rotatably connected with connecting plates 5, the side walls of the two connecting plates 5 are provided with connecting mechanisms and are connected to the blind plate 2 through the two connecting mechanisms, the inside of the blind plate 2 is symmetrically rotatably sleeved with two screw rods 6, the rod walls of the two screw rods 6 are threadedly sleeved with internal threaded pipes 7 fixedly connected to the annular plate 3, a transmission mechanism is provided between the two screw rods 6 and the two screw rods 6 are connected through the transmission mechanism, a purge pipe 8 is fixedly sleeved inside the blind plate 2, and a control valve 9 is provided on the pipe wall of the purge pipe 8. By using the set blind plate 2, the leaking heat exchanger can be steam purged to reach the construction conditions in 12 hours, which effectively shortens the downtime and reduces the downtime loss. At the same time, by using the control valve 9 provided on the pipe wall of the purge pipe 8, it can be used for drainage after the control valve 9 is opened.

[0024] like Figure 1-3 As shown, the connecting mechanism includes a connecting rod 10 and a U-shaped plate 11. The connecting rod 10 is fixedly arranged on the side wall of the corresponding connecting plate 5 and is movably connected to the U-shaped plate 11. The U-shaped plate 11 is fixedly connected to the side wall of the blind plate 2. One end of the connecting rod 10 located inside the U-shaped plate 11 is fixedly connected to a baffle 12. The baffle 12 is provided to limit the U-shaped plate 11 and prevent the U-shaped plate 11 from separating from the connecting rod 10.

[0025] like Figure 1 and Figure 3 As shown, the transmission mechanism includes a sleeve 13, a first gear 14 and two second gears 15. The sleeve 13 is fixedly arranged on one side of the blind plate 2 and is movably sleeved with the purge pipe 8. The first gear 14 is rotatably sleeved on the pipe wall of the sleeve 13. The two second gears 15 are symmetrically meshed and arranged on both sides of the first gear 14 and are respectively fixedly connected to the ends of the corresponding screw rods 6. By utilizing the set first gear 14 and the two second gears 15, the two screw rods 6 can be driven to rotate synchronously during the rotation of the first gear 14, so that the two screw rods 6 can be threadedly plugged with the corresponding internal threaded pipes 7 to achieve fixed installation of the blind plate 2.

[0026] like Figure 2 As shown, the rod walls of the two fixing rods 4 are movably sleeved with torsion springs 16, and both ends of each torsion spring 16 are fixedly connected to the side wall of the annular plate 3 and the rod wall of the corresponding fixing rod 4. By utilizing the set torsion springs 16, the corresponding fixing rod 4 can be driven to rotate when not in use, so that the blind plate 2 is rotated to one side of the heat exchanger pipe 1 under the action of the two fixing rods 4, so as to avoid affecting the normal use of the heat exchanger.

[0027] like Figure 3 As shown, the rod wall of the connecting rod 10 is movably sleeved with a spring 17, and the two ends of the spring 17 are respectively fixedly connected to the corresponding U-shaped plate 11 and the side wall of the corresponding baffle 12. By using the set spring 17, the corresponding U-shaped plate 11 can be squeezed by the elastic force of the spring 17, so that the blind plate 2 can be driven close to the end of the heat exchanger pipe 1, and then the ends of the two screw rods 6 can be inserted into the corresponding internal threaded tube 7.

[0028] like Figure 1 As shown, two L-shaped handles 18 are symmetrically fixedly provided on the outer wall of the sleeve 13. The two L-shaped handles 18 can be used to drive the sleeve 13 to rotate, thereby driving the transmission mechanism.

[0029] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A blind plate for heat exchanger maintenance, comprising a heat exchanger pipe (1) and a blind plate (2), characterized in that: The heat exchanger pipe (1) is fixedly sleeved with an annular plate (3) on its pipe wall, and two fixing rods (4) are symmetrically fixedly arranged on its side wall, and the other ends of the two fixing rods (4) are rotatably connected to connecting plates (5) on their rod walls, and the two connecting plates (5) are provided with connecting mechanisms on their side walls and are connected to the blind plate (2) via the two connecting mechanisms, and the blind plate (2) is symmetrically rotatably sleeved with two screw rods (6) on its pipe walls, and an internally threaded pipe (7) fixedly connected to the annular plate (3) is threadedly sleeved on the rod walls of the two screw rods (6), and a transmission mechanism is arranged between the two screw rods (6) and the two screw rods (6) are connected via transmission mechanism, and a purge pipe (8) is fixedly sleeved on its inside the blind plate (2), and a control valve (9) is provided on the pipe wall of the purge pipe (8).

2. A blind plate for heat exchanger maintenance according to claim 1, characterized in that: The connecting mechanism comprises a connecting rod (10) and a U-shaped plate (11); the connecting rod (10) is fixedly arranged on the side wall of the corresponding connecting plate (5) and is movably sleeved with the U-shaped plate (11); the U-shaped plate (11) is fixedly connected to the side wall of the blind plate (2); and one end of the connecting rod (10) located inside the U-shaped plate (11) is fixedly connected to a baffle (12).

3. The blind plate for heat exchanger maintenance according to claim 1, characterized in that: The transmission mechanism comprises a sleeve (13), a first gear (14) and two second gears (15); the sleeve (13) is fixedly arranged on one side of the blind plate (2) and movably sleeved with the purge pipe (8); the first gear (14) is rotatably sleeved on the pipe wall of the sleeve (13); and the two second gears (15) are symmetrically meshed and arranged on both sides of the first gear (14) and are respectively fixedly connected to the ends of corresponding screw rods (6).

4. The blind plate for heat exchanger maintenance according to claim 1, characterized in that: The rod walls of the two fixed rods (4) are both movably sleeved with torsion springs (16), and both ends of each torsion spring (16) are fixedly connected to the side wall of the annular plate (3) and the rod wall of the corresponding fixed rod (4).

5. The blind plate for heat exchanger maintenance according to claim 2, characterized in that: A spring (17) is movably sleeved on the rod wall of the connecting rod (10), and two ends of the spring (17) are respectively fixedly connected to the side wall of the corresponding U-shaped plate (11) and the corresponding baffle plate (12).

6. The blind plate for heat exchanger maintenance according to claim 3, characterized in that: Two L-shaped handles (18) are symmetrically and fixedly arranged on the outer wall of the sleeve (13).

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