Auxiliary suspension for a turbo-feed water pump

Abstract

This utility model discloses an auxiliary suspension device for a steam-driven feedwater pump, including a base mounted on the pump, a vertical rod on the base, and a cantilever connected to the rod. A lifting ring is provided on the outer casing of the pump, and a threaded lifting hole is provided on the end cover. The base has a vertical through hole and a vertical sleeve. When the vertical through hole aligns with the threaded lifting hole, the vertical sleeve correspondingly fits onto the lifting ring. Horizontal through holes are staggered within the vertical sleeve, aligning with the inner hole of the lifting ring. A first fastener passes through the vertical through hole and connects to the threaded lifting hole, and a second fastener passes through the horizontal through hole and connects to the lifting ring. The first fastener is a vertical bolt, which passes through the vertical through hole and is threaded into the threaded lifting hole. The second fastener is a horizontal bolt, which passes through the horizontal through hole and is inserted into the inner hole of the lifting ring. This utility model installs a suspension device on the steam-driven feedwater pump, allowing for the suspension and adjustment of a hydraulic wrench.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tools for maintenance in thermal power plants, and in particular to an auxiliary suspension device for a steam-driven feedwater pump. Background Technology

[0002] Steam-driven feedwater pumps are crucial auxiliary equipment in the turbine systems of thermal power plants. During routine and planned maintenance in thermal power plants, the large end caps of these pumps typically need to be disassembled and reassembled to inspect, clean, or replace internal components. Due to the high preload of the large end cap bolts, disassembly and assembly generally rely on hydraulic wrenches to provide stable and sufficient torque. However, hydraulic wrenches are large and heavy, making manual handling extremely difficult, inefficient, and posing significant labor intensity and safety risks. Currently, most thermal power plants typically use overhead cranes (bridge cranes) to lift and reposition hydraulic wrenches during steam-driven feedwater pump maintenance. However, maintenance sites are often densely populated and space-constrained, requiring multiple trades to share crane resources. Prolonged occupancy can cause scheduling conflicts and resource constraints for other maintenance projects, easily creating operational bottlenecks. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides an auxiliary suspension device for a steam-driven water pump. The suspension device is installed on the steam-driven water pump, and the hydraulic wrench is suspended and adjusted through the suspension device.

[0004] Technical Solution: To achieve the above objectives, this utility model provides an auxiliary suspension device for a steam-driven feedwater pump, comprising a base mounted on the steam-driven feedwater pump, a vertical rod mounted on the base, and a cantilever connected to the vertical rod; a lifting ring is provided on the outer casing of the steam-driven feedwater pump, and a threaded lifting hole is provided on the end cover of the steam-driven feedwater pump; a vertical through hole and a vertical sleeve are provided on the base; when the vertical through hole and the threaded lifting hole are aligned, the vertical sleeve correspondingly fits the lifting ring; horizontal through holes are staggered within the vertical sleeve, and the horizontal through holes are aligned with the inner hole of the lifting ring; a first fastener passes through the vertical through hole and connects to the threaded lifting hole, and a second fastener passes through the horizontal through hole and connects to the lifting ring.

[0005] Furthermore, the first fastener is a vertical bolt, which passes through the vertical through hole and is threadedly connected to the threaded lifting hole; the second fastener is a horizontal bolt, which passes through the horizontal through hole and is inserted into the inner hole of the lifting ring.

[0006] Furthermore, the transverse through hole has a strip-shaped cross-section, and the length direction of the strip-shaped cross-section is consistent with the length direction of the steam-driven water pump; the transverse bolt can move within the transverse through hole to change the distance between the transverse bolt and the vertical bolt.

[0007] Furthermore, the base is provided with a threaded oblique hole, the lower end of which is connected to the transverse through hole; a tightening bolt is provided inside the threaded oblique hole, which can push the transverse bolt to fit against the inner hole of the lifting ring.

[0008] Furthermore, a sleeve is provided on the base, and the upright is rotatably inserted into the sleeve.

[0009] Furthermore, the sleeve has several positioning holes distributed circumferentially at its opening; the upright has a pin hole, and when the upright is inserted into the sleeve, the pin hole can rotate to be opposite to the positioning hole; the pin passes through the positioning hole and is inserted into the pin hole, restricting the upright from rotating inside the sleeve.

[0010] Furthermore, the base is provided with an inclined reinforcing rib, the lower inclined end of the reinforcing rib is connected to the base, and the upper inclined end of the reinforcing rib is connected to the sleeve.

[0011] Furthermore, a suspension hole is provided at the end of the cantilever away from the upright.

[0012] Furthermore, the cantilever is integrally connected to the upright, and the connection between the cantilever and the upright has a rounded transition.

[0013] Furthermore, the bottom surface of the base is an arc surface, and the bottom surface of the base is in contact with the outer contour surface of the pneumatic water pump.

[0014] Beneficial effects: The auxiliary suspension device for a steam-driven water pump of this utility model has the following beneficial effects:

[0015] 1) The base of the suspension device has multiple through holes, which can be used with bolts to quickly install the suspension device on the steam-driven feedwater pump; the suspension device can realize the quick suspension and positioning of the hydraulic wrench, improving the maintenance efficiency of the steam-driven feedwater pump.

[0016] 2) A tightening bolt is provided on the base. The tightening bolt can push the horizontal bolt to fit tightly against the lifting ring, so as to achieve a tight connection between the base and the lifting ring. Attached Figure Description

[0017] Appendix Figure 1 This is a schematic diagram of the suspension device.

[0018] Appendix Figure 2 This is a schematic diagram of the structure of a steam-driven feedwater pump;

[0019] Appendix Figure 3 A schematic diagram of a suspension device being installed on a steam-driven feedwater pump;

[0020] Appendix Figure 4 A schematic diagram showing how the jacking bolt is used to push the transverse bolt to fit into the inner hole of the lifting ring. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] As attached Figures 1 to 4 An auxiliary suspension device for a steam-driven feedwater pump, comprising a base 2 mounted on the steam-driven feedwater pump 1, a vertical rod 3 mounted on the base 2, and a cantilever 4 connected to the vertical rod 3, on which a hand-operated hoist or a hydraulic wrench can be suspended. The suspension device provides a safe and reliable load-bearing point for the disassembly and assembly of the large end cap bolt 19 on the steam-driven feedwater pump 1. The large end cap bolt 19 on the steam-driven feedwater pump 1 is shown in the attached diagram. Figure 2 and 3 As shown in the image.

[0023] The structure of steam-driven feedwater pump 1 is shown in the attached figure. Figure 2 As shown, a lifting ring 5 is provided on the outer casing of the steam-driven feedwater pump 1, and a threaded lifting hole 6 is provided on the end cover of the steam-driven feedwater pump 1, with the opening of the threaded lifting hole 6 facing upwards. The suspension device is installed on the steam-driven feedwater pump 1 through the lifting ring 5 and the threaded lifting hole 6. Specifically, a vertical through hole 7 and a vertical sleeve 8 are provided on the base 2. When the vertical through hole 7 is opposite to the threaded lifting hole 6, the vertical sleeve 8 is fitted onto the lifting ring 5. Horizontal through holes 9 are staggered inside the vertical sleeve 8. When the vertical sleeve 8 fits onto the lifting ring 5, the horizontal through holes 9 are opposite to the inner hole of the lifting ring 5. A first fastener passes through the vertical through hole 7 and connects to the threaded lifting hole 6, and a second fastener passes through the horizontal through hole 9 and connects to the lifting ring 5, thereby fixing the base 2 onto the steam-driven feedwater pump 1, thus installing the suspension device on the steam-driven feedwater pump 1.

[0024] Specifically, the first fastener is a vertical bolt 10, which passes through the vertical through hole 7 and is threaded into the threaded lifting hole 6. The second fastener is a horizontal bolt 11, which passes through the horizontal through hole 9 and is inserted into the inner hole of the lifting ring 5. The end of the horizontal bolt 11 passes through the inner hole of the lifting ring 5 and the horizontal sleeve hole and is threaded into the lock nut, thereby fixing the horizontal bolt 11 to the base 2.

[0025] For steam-driven feedwater pumps 1 of different specifications, the distance between the lifting ring 5 and the threaded lifting hole 6 on the steam-driven feedwater pump 1 may vary. To improve the adaptability of the base 2, the transverse through hole 9 is set as a strip-shaped hole, that is, the transverse through hole 9 has a strip-shaped cross-section, and the length direction of the strip-shaped cross-section is consistent with the length direction of the steam-driven feedwater pump 1. Therefore, the transverse bolt 11 can move within the transverse through hole 9, changing the distance between the transverse bolt 11 and the vertical bolt 10 to adapt to changes in the distance between the lifting ring 5 and the threaded lifting hole 6.

[0026] In practical applications, the inner diameter of the lifting eye 5 is larger than the outer diameter of the transverse bolt 11. Therefore, the transverse bolt 11 can move within the inner diameter of the lifting eye 5, resulting in a loose connection between the base 2 and the lifting eye 5, which can easily cause the base 2 to loosen. Therefore, as shown in the attached... Figure 4As shown, a threaded oblique hole 12 is provided on the base 2, and the lower oblique end of the threaded oblique hole 12 communicates with the transverse through hole 9. A tightening bolt 13 is provided in the threaded oblique hole 12. The tightening bolt 13 can push the transverse bolt 11 to fit tightly against the inner hole of the lifting ring 5, so that the transverse bolt 11 will not move in the inner hole of the lifting ring 5, thereby making the connection between the lifting ring 5 and the base 2 more secure.

[0027] The base 2 is provided with a vertical sleeve 14, and the upright 3 is rotatably inserted into the sleeve 14. By rotating the upright 3, the angle of the cantilever 4 can be changed. When the hydraulic wrench is suspended below the cantilever 4 by a chain hoist or hand chain hoist, the position of the hydraulic wrench can be changed to meet the needs of different maintenance angles and working spaces.

[0028] The sleeve 14 has a plurality of positioning holes 15 arranged circumferentially at its opening. The upright 3 has pin holes, and also a plurality of pin holes on the upright 3. When the upright 3 is inserted into the sleeve 14, the pin holes can rotate to align with the positioning holes 15. A pin 16 passes through the positioning holes 15 and is inserted into the pin holes, restricting the rotation of the upright 3 within the sleeve 14, thereby locking the angle of the cantilever 4. In one embodiment, four positioning holes 15 are arranged circumferentially at equal angles at the opening of the sleeve 14, and correspondingly, four pin holes are arranged circumferentially on the upright 3.

[0029] The base 2 is provided with an inclined reinforcing rib 17. The lower inclined end of the reinforcing rib 17 is connected to the base 2, and the upper inclined end of the reinforcing rib 17 is connected to the sleeve 14. The rib can enhance the structural rigidity and fatigue resistance.

[0030] A suspension hole 18 is provided at the end of the cantilever 4 away from the upright 3. (See attached image) Figure 1 In one embodiment shown, a connecting plate is welded to the lower end of the cantilever 4, and a suspension hole 18 is provided on the connecting plate. A chain hoist or chain can be hung on the suspension hole 18, and then a hydraulic wrench can be dropped to the lower end of the chain hoist or chain.

[0031] The cantilever 4 is integrally connected to the upright 3, and the connection between the cantilever 4 and the upright 3 is rounded to enhance the uniformity of stress and safety of the structure.

[0032] The bottom surface of the base 2 is an arc surface, and the bottom surface of the base 2 is in contact with the outer contour surface of the steam-driven water pump 1, so that the base 2 can be installed more stably on the steam-driven water pump 1.

[0033] This utility model provides a suspension device. Taking advantage of the features of the steam-driven water pump 1 having a lifting ring 5 and a threaded lifting hole 6, the base 2 of the suspension device is designed to facilitate the installation of the suspension device on the steam-driven water pump 1. Then, the hydraulic wrench is suspended on the suspension device by a hand chain hoist or a suspension chain, realizing the rapid suspension and positioning of the hydraulic wrench without relying on the vehicle's assistance, greatly reducing the occupation of vehicle resources, and effectively avoiding delays in maintenance progress caused by waiting for the vehicle.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An auxiliary suspension device for a steam-driven feedwater pump, characterized in that: Includes a base (2) installed on the steam-driven water pump (1), a vertical rod (3) is provided on the base (2), and a cantilever (4) is connected to the vertical rod (3); a lifting ring (5) is provided on the outer shell of the steam-driven water pump (1), and a threaded lifting hole (6) is provided on the end cover of the steam-driven water pump (1); The base (2) is provided with a vertical through hole (7) and a vertical sleeve (8); when the vertical through hole (7) is opposite to the threaded lifting hole (6), the vertical sleeve (8) is correspondingly fitted onto the lifting ring (5); the vertical sleeve (8) is provided with interlaced horizontal through holes (9), and the horizontal through holes (9) are opposite to the inner hole of the lifting ring (5); the first fastener passes through the vertical through hole (7) and is connected to the threaded lifting hole (6), and the second fastener passes through the horizontal through hole (9) and is connected to the lifting ring (5).

2. The auxiliary suspension device for a steam-driven feedwater pump according to claim 1, characterized in that: The first fastener is a vertical bolt (10), which passes through the vertical through hole (7) and is threaded to the threaded lifting hole (6); the second fastener is a horizontal bolt (11), which passes through the horizontal through hole (9) and is inserted into the inner hole of the lifting ring (5).

3. The auxiliary suspension device for a steam-driven feedwater pump according to claim 2, characterized in that: The transverse through hole (9) has a strip-shaped cross-section, and the length direction of the strip-shaped cross-section is consistent with the length direction of the steam-driven water pump (1); the transverse bolt (11) can move within the transverse through hole (9) to change the distance between the transverse bolt (11) and the vertical bolt (10).

4. The auxiliary suspension device for a steam-driven feedwater pump according to claim 3, characterized in that: The base (2) is provided with a threaded oblique hole (12), the lower end of the threaded oblique hole (12) is connected to the transverse through hole (9); a tightening bolt (13) is provided in the threaded oblique hole (12), and the tightening bolt (13) can push the transverse bolt (11) to fit against the inner hole of the lifting ring (5).

5. The auxiliary suspension device for a steam-driven feedwater pump according to claim 1, characterized in that: A sleeve (14) is provided on the base (2), and the upright (3) is rotatably inserted into the sleeve (14).

6. The auxiliary suspension device for a steam-driven feedwater pump according to claim 5, characterized in that: The sleeve (14) has several positioning holes (15) distributed circumferentially at the opening; the upright (3) is provided with a pin hole, and when the upright (3) is inserted into the sleeve (14), the pin hole can rotate to be opposite to the positioning hole (15); the pin (16) passes through the positioning hole (15) and is inserted into the pin hole, restricting the upright (3) from rotating in the sleeve (14).

7. The auxiliary suspension device for a steam-driven feedwater pump according to claim 5, characterized in that: The base (2) is provided with an inclined reinforcing rib (17), the lower inclined end of the reinforcing rib (17) is connected to the base (2), and the upper inclined end of the reinforcing rib (17) is connected to the sleeve (14).

8. The auxiliary suspension device for a steam-driven feedwater pump according to claim 1, characterized in that: A suspension hole (18) is provided at one end of the cantilever (4) away from the upright (3).

9. An auxiliary suspension device for a steam-driven feedwater pump according to claim 8, characterized in that: The cantilever (4) is integrally connected with the upright (3), and the connection between the cantilever (4) and the upright (3) is rounded.

10. An auxiliary suspension device for a steam-driven feedwater pump according to claim 1, characterized in that: The bottom surface of the base (2) is an arc surface, and the bottom surface of the base (2) is attached to the outer contour surface of the steam-driven water pump (1).

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