Crankcase beam dismounting device

Abstract

The utility model relates to a crankcase cross beam dismounting device which comprises a first supporting plate and a second supporting plate, a first hydraulic cylinder and a second hydraulic cylinder are installed between the first supporting plate and the second supporting plate, the first hydraulic cylinder is located above the second hydraulic cylinder, and a bottom plate is installed at the output end of the first hydraulic cylinder. The two opposite sides of the bottom of the bottom plate are fixedly provided with sleeving mechanisms used for being arranged on the cross beam in a sleeving mode. The second hydraulic cylinder is placed at the opening of the crankcase, the two sleeving mechanisms are arranged at the two ends of the cross beam in a sleeving mode, the opening of the crankcase is jacked open through the second hydraulic cylinder, the crankcase slightly and elastically deforms, and therefore most force of the crankcase for pressing the cross beam is counteracted, and the first hydraulic cylinder is used for driving the bottom plate to ascend. Therefore, the sleeving mechanism is driven to ascend, the cross beam is driven to ascend and completely leave the interior of the crankcase, the cross beam is easy and convenient to disassemble, and the maintenance efficiency of the main bearing bush is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a crankcase crossbeam disassembly device. Background Art

[0002] At present, the hydrogenation units in oil refineries and chemical plants are developing towards large-scale design, requiring that the key equipment reciprocating machines must also be designed towards large thrust. The currently popular international piston force equivalent reciprocating compressors are symmetrically balanced. The 125 series and 150 series have been widely used in large hydrogenation units. Due to the use of large piston force equivalent, the crankcase of the reciprocating compressor is required to have sufficient strength and rigidity. Considering the processing technology, production and economic benefits, the thickness of the side plate of the crankcase fuselage is limited. Therefore, in order to increase the rigidity and bearing capacity of the crankcase, a relatively thick beam is sandwiched between the inner walls at the top opening of the crankcase. Generally, 6-8 beams are designed to bear the inertial force generated by the crankshaft during rotation. In order to increase the bearing capacity of the beam, the inner wall of the crankcase and the beam are interference fit, and the interference value is relatively large. The interference value is generally designed to be 0.18mm~0.30mm.

[0003] When maintaining the main bearing inside the existing crankcase, the crossbeam needs to be removed from the crankcase first. Since the inner wall of the crankcase and the crossbeam are interference fit, the crossbeam will be pressed between the inner walls of the crankcase, making it difficult to remove the crossbeam, affecting the maintenance efficiency of the main bearing. Utility Model Content

[0004] The purpose of the utility model is to design a crankcase crossbeam disassembly device so as to solve the problems mentioned in the background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A crankcase crossbeam disassembly device comprises a first support plate and a second support plate, a first hydraulic cylinder and a second hydraulic cylinder are installed between the first support plate and the second support plate, the first hydraulic cylinder is located above the second hydraulic cylinder, a bottom plate is installed at the output end of the first hydraulic cylinder, and tightening mechanisms for being sleeved on the crossbeam are fixed on opposite sides of the bottom of the bottom plate.

[0007] Furthermore, the tightening mechanism includes a first pull rope and a second pull rope that are relatively arranged, one end of the first pull rope is fixedly connected to the bottom of the base plate, and the other end is fixedly connected to a receiving plate, the top of the receiving plate is in contact with the bottom of the beam, and one end of the second pull rope is fixedly connected to the bottom of the base plate, and the other end is connected to the receiving plate.

[0008] Furthermore, one end of the second pull rope away from the base plate is fixedly connected to a connecting block, and one side of the receiving plate close to the second pull rope is fixedly connected to a connecting column, the connecting block is provided with a connecting hole, and one end of the connecting column away from the receiving plate passes through the connecting hole and is provided with an external thread, and a fixing nut is threadedly connected to the external thread.

[0009] Furthermore, the first support plate and the second support plate are fixedly connected at their sides close to each other via a connecting plate, and the second hydraulic cylinder is installed at the bottom of the connecting plate.

[0010] Furthermore, two second hydraulic cylinders are provided and are symmetrically arranged with respect to the first hydraulic cylinder, and supporting feet are provided on the second hydraulic cylinders.

[0011] Furthermore, the tops of the first support plate and the second support plate are fixedly connected via a support frame, and the first hydraulic cylinder is mounted on the support frame.

[0012] Furthermore, two sliding rods symmetrically arranged with respect to the first hydraulic cylinder are provided on the top of the bottom plate, and sliding holes for the sliding rods to pass through are provided on the support frame.

[0013] The beneficial effects of the utility model are:

[0014] By placing the second hydraulic cylinder at the opening of the crankcase and putting two tightening mechanisms on the two ends of the crossbeam, the second hydraulic cylinder is used to push open the opening of the crankcase, causing the crankcase to undergo slight elastic deformation, thereby offsetting most of the force of the crankcase pressing the crossbeam. The first hydraulic cylinder is used to drive the bottom plate to rise, thereby driving the tightening mechanism to rise, and then driving the crossbeam to rise and completely leave the interior of the crankcase, making the disassembly of the crossbeam simple and convenient, and avoiding affecting the maintenance efficiency of the main bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0017] Figure 2 It is a structural schematic diagram of another perspective of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the utility model in working state;

[0019] Figure 4 This is a schematic diagram of the structure of the crankcase hidden in the working state of the utility model.

[0020] The names of the components marked in the figure are as follows:

[0021] 1. First support plate; 2. Second support plate; 3. First hydraulic cylinder; 4. Second hydraulic cylinder; 5. Bottom plate; 6. First pull rope; 7. Second pull rope; 8. Adapter plate; 9. Connecting block; 10. Connecting column; 11. Connecting hole; 12. External thread; 13. Fixing nut; 14. Connecting plate; 15. Support foot; 16. Support frame; 17. Slide rod; 18. Slide hole; 19. Crossbeam; 20. Crankcase. DETAILED DESCRIPTION

[0022] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0023] like Figure 1-4As shown, a crankcase crossbeam disassembly device comprises a first support plate 1 and a second support plate 2, which are used to be placed on the top of the crankcase 20; the tops of the first support plate 1 and the second support plate 2 are fixedly connected by a support frame 16, and a first hydraulic cylinder 3 is installed on the support frame 16. The first support plate 1 and the second support plate 2 are fixedly connected on one side close to each other by a connecting plate 14, and a second hydraulic cylinder 4 is installed at the bottom of the connecting plate 14, which is used to be placed at the opening of the crankcase 20, so as to push open the opening of the crankcase 20, so that the crankcase 20 undergoes slight elastic deformation, thereby offsetting most of the force of the crankcase 20 pressing the crossbeam, and greatly reducing the force of the crankcase 20 pressing the crossbeam 19 at the opening. In order to prevent the crankcase 20 from deforming too much and the crankcase 20 from undergoing plastic deformation, when using the disassembly device, a dial indicator is installed between one end of the second hydraulic cylinder 4 and the inner wall of the crankcase 20, and the dial indicator is monitored by monitoring the , to control the elongation of the second hydraulic cylinder 4 to ensure that the crankcase 20 does not undergo plastic deformation; the second hydraulic cylinder 4 is provided with two and symmetrically arranged with respect to the first hydraulic cylinder 3, so as to better push open the opening of the crankcase 20; the second hydraulic cylinder 4 is provided with a supporting foot 15, so that the crossbeam disassembly device can be placed directly on the ground when not in use; the first hydraulic cylinder 3 is located above the second hydraulic cylinder 4, and a bottom plate 5 is installed at the output end of the first hydraulic cylinder 3, and two sliding rods 17 symmetrically arranged with respect to the first hydraulic cylinder 3 are provided on the top of the bottom plate 5, and a sliding hole 18 for the sliding rod 17 to pass through is provided on the support frame 16, so as to improve the stability of the bottom plate 5 in the process of moving up and down; a tightening mechanism for being sleeved on the crossbeam 19 is fixed on the opposite sides of the bottom of the bottom plate 5, and the crossbeam 19 is sleeved by the tightening mechanism, and the first hydraulic cylinder 3 drives the bottom plate 5 to rise, thereby driving the crossbeam 19 to rise and completely leave the interior of the crankcase 20;

[0024] The tightening mechanism includes a first pull rope 6 and a second pull rope 7 which are arranged relatively to each other. One end of the first pull rope 6 is fixedly connected to the bottom of the base plate 5, and the other end is fixedly connected to a receiving plate 8. The top of the receiving plate 8 contacts the bottom of the cross beam 19. One end of the second pull rope 7 is fixedly connected to the bottom of the base plate 5, and the other end is fixedly connected to a connecting block 9. A connecting column 10 is fixedly connected to the side of the receiving plate 8 close to the second pull rope 7. A connecting hole 11 is provided on the connecting block 9. An end of the connecting column 10 away from the receiving plate 8 passes through the connecting hole 11 and is provided with an external thread 12. A fixing nut 13 is threaded on the external thread 12, so that the two tightening mechanisms can be respectively sleeved on the two ends of the cross beam 19.

[0025] Working principle:

[0026] like Figure 1-4As shown, when the crossbeam disassembly device is in use, the first support plate 1 and the second support plate 2 are first placed on the top of the crankcase 20. At this time, the two second hydraulic cylinders 4 are located in the opening at the top of the crankcase 20. Then, the two tightening mechanisms are sleeved on the two ends of the crossbeam 19, and the bottom of the crossbeam 19 is passed through the receiving plate 8. The connecting column 10 is passed through the connecting hole 11 of the connecting block 9, and then the fixing nut 13 is tightened on the external thread 12 of the connecting column 10. After that, the second hydraulic cylinder 4 can be started to push open the opening of the crankcase 20, and then the first hydraulic cylinder 3 can be started. The first hydraulic cylinder 3 drives the bottom plate 5 to rise, thereby driving the receiving plate 8 to rise, and then driving the crossbeam 19 to rise and completely leave the interior of the crankcase 20, thereby completing the disassembly of the crossbeam 19.

[0027] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A crankcase crossbeam disassembly device, characterized in that: The invention comprises a first support plate (1) and a second support plate (2), wherein a first hydraulic cylinder (3) and a second hydraulic cylinder (4) are installed between the first support plate (1) and the second support plate (2), the first hydraulic cylinder (3) is located above the second hydraulic cylinder (4), a bottom plate (5) is installed at the output end of the first hydraulic cylinder (3), and a tightening mechanism for being sleeved on a crossbeam (19) is fixed on opposite sides of the bottom of the bottom plate (5).

2. The crankcase crossbeam disassembly device according to claim 1, characterized in that: The tightening mechanism comprises a first pull rope (6) and a second pull rope (7) which are arranged opposite to each other, one end of the first pull rope (6) is fixedly connected to the bottom of the base plate (5), and the other end is fixedly connected to a receiving plate (8), the top of the receiving plate (8) is in contact with the bottom of the cross beam (19), and one end of the second pull rope (7) is fixedly connected to the bottom of the base plate (5), and the other end is connected to the receiving plate (8).

3. The crankcase crossbeam disassembly device according to claim 2, characterized in that: The end of the second pull rope (7) away from the bottom plate (5) is fixedly connected to a connecting block (9), and the side of the receiving plate (8) close to the second pull rope (7) is fixedly connected to a connecting column (10), the connecting block (9) is provided with a connecting hole (11), and the end of the connecting column (10) away from the receiving plate (8) passes through the connecting hole (11) and is provided with an external thread (12), and a fixing nut (13) is threadedly connected to the external thread (12).

4. The crankcase crossbeam disassembly device according to claim 1, characterized in that: The first support plate (1) and the second support plate (2) are fixedly connected at their respective sides close to each other via a connecting plate (14), and the second hydraulic cylinder (4) is mounted on the bottom of the connecting plate (14).

5. The crankcase crossbeam disassembly device according to claim 1, characterized in that: Two second hydraulic cylinders (4) are provided and are symmetrically arranged with respect to the first hydraulic cylinder (3), and supporting feet (15) are provided on the second hydraulic cylinder (4).

6. The crankcase crossbeam disassembly device according to claim 1, characterized in that: The tops of the first support plate (1) and the second support plate (2) are fixedly connected via a support frame (16), and the first hydraulic cylinder (3) is mounted on the support frame (16).

7. The crankcase crossbeam disassembly device according to claim 6, characterized in that: Two slide bars (17) symmetrically arranged with respect to the first hydraulic cylinder (3) are arranged on the top of the bottom plate (5), and a slide hole (18) for the slide bars (17) to pass through is arranged on the support frame (16).

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