Core-pulling auxiliary device for tube bundle of hydrogenation heat exchanger

Abstract

The utility model belongs to the technical field of tube bundle dismounting devices, and particularly discloses a hydrogenation heat exchanger tube bundle core pulling auxiliary device which comprises a first supporting rod and a second supporting rod, the end of each first supporting rod is connected with the end of the corresponding second supporting rod, and a connecting plate is arranged at the joint of each first supporting rod and the corresponding second supporting rod. A chain block is arranged on the connecting plate, arc-shaped plates are arranged at the ends, away from the first supporting rod, of the two second supporting rods, and through holes are formed in the arc-shaped plates. The utility model aims to solve the problems that the maintenance cost is increased and the labor time is increased because the tube bundle is extruded and damaged because a crane cannot accurately control the direction and the pulling force in the core pulling and reassembling process of the tube bundle at present. The first supporting rod, the second supporting rod and the electric hoist are used in cooperation, accurate control over tube bundle core pulling is achieved, it is guaranteed that the core pulling process is carried out stably, uncertainty caused by a crane is reduced, the possibility of damage to a tube bundle is reduced, and dismounting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tube bundle disassembly devices, in particular to a tube bundle core extraction auxiliary device for a hydrogenation heat exchanger. Background Art

[0002] Hydrogenation heat exchanger is a key equipment used in industrial production, mainly used for heat exchange in the process of hydrogenation reaction, in the fields of chemical industry, petroleum, natural gas, etc. Hydrogenation reaction usually requires high temperature and high pressure conditions, and hydrogenation heat exchanger is an important equipment used to adjust and maintain the reaction temperature. The main function of hydrogenation heat exchanger is to exchange heat between high temperature and high pressure hydrogen and raw materials during hydrogenation reaction, thereby reducing reaction temperature and pressure, and improving reaction efficiency and yield.

[0003] The raw materials for hydrogenation reactions usually contain a variety of impurities, such as sulfides, chlorides, etc. These impurities may react chemically with the hydrocarbons in the reaction materials to generate solid products that are easy to precipitate. These solid products will gradually accumulate inside the shell of the hydrogenation heat exchanger to form carbides, causing blockage inside the heat exchanger. Therefore, in order to ensure the normal operation of the device system, a core extraction inspection of the tube bundle is carried out once a year.

[0004] However, during the process of core extraction and reinstallation of the tube bundle, it is currently impossible to disassemble and reinstall the tube bundle manually, so a crane is required to assist in loading and unloading operations. However, the crane cannot accurately control the direction and pulling force. Excessive force may cause the tube bundle to be squeezed, bent or otherwise damaged, resulting in increased maintenance costs and increased labor time. Utility Model Content

[0005] The utility model aims to provide a tube bundle core extraction auxiliary device for a hydrogenation heat exchanger, so as to solve the problem that during the tube bundle core extraction and reinstallation process, the crane cannot accurately control the direction and pulling force, causing the tube bundle to be squeezed and damaged, resulting in increased maintenance costs and increased labor time.

[0006] In order to achieve the above-mentioned purpose, the basic solution provided by the utility model is: a core pulling auxiliary device for a hydrogenation heat exchanger tube bundle, comprising two first support rods and a second support rod, the ends of each of the first support rod and the second support rod are connected to each other, a connecting plate is provided at the connection between the first support rod and the second support rod, a hand winch is provided on the connecting plate, and an arc plate is provided on the end of each of the two second support rods away from the first support rod, and a through hole is provided on the arc plate.

[0007] The working principle of the utility model is as follows: when it is necessary to extract the core of the tube bundle of the hydrogenation heat exchanger, first remove the cover at the opening of the hydrogenation heat exchanger, then align the through hole on the arc plate with the threaded hole of the flange at the opening of the hydrogenation heat exchanger shell, and connect and fix the arc plate with the hydrogenation heat exchanger shell by bolts, then connect the hook of the hand chain hoist with the lifting ear of the tube bundle, then the staff pulls the manual chain of the hand chain hoist to rotate the hand chain wheel of the hand chain hoist in the clockwise direction, and the connecting rope at the hook end of the hand chain wheel is rolled up. As the connecting rope is tightened, the hydrogenation heat exchanger shell is The tube bundle in the body moves outward. After the tube bundle moves outward for a certain distance, the staff pulls the manual chain without loosening it, and then puts two lifting belts on the tube bundle respectively, and the free ends of the two lifting belts are hooked on the first support rod and pulled downward without loosening. As the tube bundle moves outward, the innermost lifting belt is slowly moved toward the shell of the hydrogenation heat exchanger, and then the manual chain is continued to be pulled. After the tube bundle is completely pulled out of the shell of the hydrogenation heat exchanger, the free ends of the two lifting belts are gradually loosened to move the tube bundle downward. When the tube bundle contacts the ground, the core pulling of the tube bundle is completed.

[0008] The beneficial effects of the utility model are as follows: a stable supporting structure can be provided by setting the first support rod and the second support rod, ensuring that the tube bundle will not tilt or shake due to weight during the core pulling process, thereby reducing the operational risk; through the coordinated use of the electric hoist, precise control of the tube bundle core pulling can be achieved, including the adjustment of speed and force, ensuring that the core pulling process is carried out smoothly, reducing the uncertainty caused by the crane, reducing the possibility of damage to the tube bundle, and improving the disassembly efficiency.

[0009] Option 2, which is the preferred option of the basic option, is provided with a connecting rope at the hook end of the hand chain hoist, and horseshoe rings are provided at both ends of the connecting rope; the connecting rope is provided at the hook end of the hand chain hoist to facilitate the stable connection of the tube bundle and improve the stability of disassembly.

[0010] Option three, which is a preferred option of the basic option, wherein the first support rod and the second support rod are bolted together, the first support rod and the second support rod are hinged with the first pull rod and the second pull rod respectively, and the first pull rod and the second pull rod are bolted together; the first support rod and the second support rod are bolted together, and the first pull rod and the second pull rod are hinged on the first support rod and the second support rod; the first support rod and the second support rod are convenient for folding the first support rod and the second support rod to save floor space.

[0011] Option 4, which is the preferred option of the basic option, is provided with two fixed plates on the second support rod, each of the fixed plates is provided with a double-drum winch, and the free end of the wire rope of each double-drum winch is detachably connected to the support plate; the double-drum winch and the support plate are arranged on the fixed plate to facilitate the lifting and disassembly of the tube bundle.

[0012] Option 5 is a preferred option of Option 4. A plurality of slide drums are provided on the fixed plate, and the wire rope of each double-drum winch passes through the slide drum. A slide drum is provided on the fixed plate, and the wire rope of the double-drum winch passes through the slide drum, which can prevent the wire rope from rubbing against the fixed plate and damaging the fixed plate during the winding process.

[0013] Option six, which is a preferred embodiment of Option four, is provided with a rubber pad on the top of the support plate; the rubber pad is provided on the support plate to facilitate buffering of the tube bundle and prevent the tube bundle from being squeezed and deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a stereoscopic diagram of a tube bundle core pulling auxiliary device for a hydrogenation heat exchanger according to the utility model;

[0015] Figure 2 This is a front view of a tube bundle core extraction auxiliary device for a hydrogenation heat exchanger according to the utility model;

[0016] Figure 3 It is a top view of a tube bundle core extraction auxiliary device for a hydrogenation heat exchanger according to the utility model;

[0017] Figure 4 The utility model is a schematic structural diagram of a tube bundle core pulling auxiliary device for a hydrogenation heat exchanger during tube bundle core pulling. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below through specific implementation methods:

[0019] The figure marks in the drawings of the specification include: 1. first support rod; 2. second support rod; 3. connecting plate; 4. hand winch; 5. arc plate; 6. through hole; 7. connecting rope; 8. horseshoe ring; 9. first pull rod; 10. second pull rod; 11. fixing plate; 12. double-drum winch; 13. wire rope; 14. support plate; 15. slide drum.

[0020] like Figures 1 to 4 As shown: a core pulling auxiliary device for a hydrogenation heat exchanger tube bundle, comprising two first support rods 1 and a second support rod 2, the first support rod 1 and the second support rod 2 are bolted, the first support rod 1 and the second support rod 2 are hinged with a first pull rod 9 and a second pull rod 10 respectively, the first pull rod 9 and the second pull rod 10 are bolted to the two first support rods 1, and the ends close to the second support rod 2 are fixedly connected with a connecting plate 3, a hand chain hoist 4 is detachably connected to the connecting plate 3, a connecting rope 7 is hooked at the hook end of the hand chain hoist 4, and both ends of the connecting rope 7 are detachably connected with horseshoe rings 8, and an arc plate 5 is provided at one end of the two second support rods 2 away from the first support rod 1, and a through hole 6 is provided on the arc plate 5.

[0021] Two fixed plates 11 are fixedly connected to the second support rod 2, and a double-drum winch 12 is detachably connected to each fixed plate 11. The free end of the wire rope 13 of each double-drum winch 12 is detachably connected to a support plate 14, and a rubber pad is provided on the top of the support plate 14. Several slide drums 15 are fixedly connected to the fixed plate 11, and the wire rope 13 of each double-drum winch 12 passes through the slide drum 15 respectively.

[0022] The implementation method of this embodiment is as follows: when it is necessary to extract the core of the tube bundle of the hydrogenation heat exchanger, firstly, the bolts and nuts at the connection between the first support plate 1 and the second support plate 2 and the first tie rod 9 and the second tie rod 10 are loosened respectively, and then the second support rod 2 is rotated in the opposite direction relative to the double-drum winch 12 to stretch the first tie rod 9 and the second tie rod 10. After the first tie rod 9 and the second tie rod 10 are stretched to the limit, the bolts and nuts at the connection between the first support plate 1 and the second support plate 2 and the first tie rod 9 and the second tie rod 10 are tightened respectively, and then the cover at the opening of the hydrogenation heat exchanger is removed, and then the through hole 6 on the arc plate 5 is aligned with the threaded hole of the flange at the opening of the hydrogenation heat exchanger shell, and the arc plate 5 is connected and fixed to the hydrogenation heat exchanger shell by bolts, and then the double-drum winch 12 is started to release the wire rope 13 of the double-drum winch 12, and the support plate 14 moves downward. When the top height of the support plate 14 is lower than the bottom of the tube bundle, the double-drum winch 12 is closed, and then the connection The horseshoe rings 8 at both ends of the rope 7 are connected to the lifting ears of the tube bundle respectively. Then the staff pulls the manual chain of the hand chain hoist 4 to rotate the hand chain wheel of the hand chain hoist 4 in a clockwise direction, and the connecting rope 7 at the hook end of the hand chain wheel is wound up. As the connecting rope 7 is tightened, the tube bundle in the shell of the hydrogenation heat exchanger moves outward. After the tube bundle moves outward for a certain distance, the staff pulls the manual chain without loosening it, and then starts the double-drum winch 12 to wind up the wire rope 13 of the double-drum winch 12 and connect it to the wire rope 13. The support plate 14 moves upward. When the support plate 14 contacts the bottom of the tube bundle, the double-drum winch 12 is closed. Then the manual chain is pulled continuously to completely pull the tube bundle out of the shell of the hydrogenation heat exchanger. Then the double-drum winch 12 is started to release the steel wire rope 13 of the double-drum winch 12. The support plate 14 moves downward. When the support plate 14 contacts the ground, the double-drum winch 12 is closed. Then the horseshoe ring 8 on the connecting rope 7 is disassembled and separated from the lifting ear of the tube bundle. Then, the core pulling of the tube bundle is completed.

[0023] When it is not necessary to pull the core of the tube bundle, first loosen the bolts and nuts at the connection between the first support plate 1 and the second support plate 2 and the first tie rod 9 and the second tie rod 10 respectively, then rotate the second support rod 2 relative to the direction of the double-drum winch 12 to fold the first tie rod 9 and the second tie rod 10. After the first tie rod 9 and the second tie rod 10 are completely folded, tighten the bolts and nuts at the connection between the first support plate 1 and the second support plate 2 and the first tie rod 9 and the second tie rod 10 respectively.

[0024] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A core extraction auxiliary device for a hydrogenation heat exchanger tube bundle, characterized in that: The invention comprises two first support rods (1) and a second support rod (2), the ends of each of the first support rod (1) and the second support rod (2) are connected to each other, a connecting plate (3) is provided at the ends of the two first support rods (1) close to the second support rod (2), a hand chain hoist (4) is provided on the connecting plate (3), and an arc plate (5) is provided at one end of the two second support rods (2) away from the first support rod (1), and a through hole (6) is provided on the arc plate (5).

2. The core extraction auxiliary device for a hydrogenation heat exchanger tube bundle according to claim 1, characterized in that: A connecting rope (7) is hooked on the hook end of the hand chain hoist (4), and both ends of the connecting rope (7) are provided with horseshoe rings (8).

3. The core extraction auxiliary device for a hydrogenation heat exchanger tube bundle according to claim 1, characterized in that: The first support rod (1) and the second support rod (2) are connected by bolts, and the first support rod (1) and the second support rod (2) are respectively hinged with a first pull rod (9) and a second pull rod (10), and the first pull rod (9) and the second pull rod (10) are connected by bolts.

4. The core extraction auxiliary device for a hydrogenation heat exchanger tube bundle according to claim 1, characterized in that: The second support rod (2) is provided with two fixing plates (11), each of the fixing plates (11) is provided with a double-drum winch (12), and the free end of the steel wire rope (13) of each double-drum winch (12) is detachably connected to a support plate (14).

5. The core extraction auxiliary device for a hydrogenation heat exchanger tube bundle according to claim 4, characterized in that: A plurality of slide drums (15) are provided on the fixed plate (11), and the steel wire rope (13) of each double-drum winch (12) passes through the slide drum (15).

6. The core extraction auxiliary device for a hydrogenation heat exchanger tube bundle according to claim 4, characterized in that: A rubber pad is provided on the top of the support plate (14).

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