Drawing device for disassembling centrifugal pump impeller

Abstract

The drawing device comprises a lead screw beam, pull rods are connected to the two ends of the lead screw beam through pull rod lap joint square holes, crescent plates are connected to the tail ends of the two pull rods through hook claw connecting threads, three hook claw adjusting strip holes are evenly formed in each crescent plate, and the two ends of each hook claw adjusting strip hole are connected with the corresponding pull rod lap joint square hole. The middle of the lead screw beam is provided with a jackscrew thread and connected with a jackscrew rod through the jackscrew thread, the other end of the jackscrew rod is provided with a sliding rod connecting thread and connected with a sliding rod through the sliding rod connecting thread, and the sliding rod is sleeved with a sliding hammer. A knocking plane is arranged at the end, away from the jackscrew rod, of the sliding rod. The drawing device solves the problem that an impeller of an existing centrifugal pump is difficult to disassemble.

Description

TECHNICAL FIELD

[0001] The utility model belongs to impeller maintenance device technical field, and specifically relates to the drawing device for the dismounting of centrifugal pump impeller. BACKGROUND

[0002] Centrifugal pump is the common equipment in petroleum refining field, and also belongs to important equipment, and its running speed is high, medium is complex, running cycle is long, and downtime is short. The impeller is arranged on the pump shaft, and under the condition of long time running, the impeller is often difficult to dismount during maintenance, and sometimes the impeller is deformed, cracked or even scrapped when being dismounted by using a crowbar or other tools. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing the drawing device for the dismounting of centrifugal pump impeller, and solves the problem of difficult dismounting of the centrifugal pump impeller.

[0004] The utility model adopts the technical scheme of: the drawing device for the dismounting of centrifugal pump impeller, including screw beam, the both ends of screw beam are connected with pull rod through pull rod lap joint square hole, the both ends of two pull rods are connected with crescent plate through hook claw connection screw thread, three hook claw adjusting strip holes are evenly arranged on the crescent plate, and hook claw is connected in the hook claw adjusting strip hole through hook claw fastening screw thread, and the middle part of screw beam is equipped with top screw thread, and is connected with top screw rod through top screw thread.

[0005] The utility model adopts the technical scheme, and its characteristics are:

[0006] Further, the other end of top screw rod is provided with slide rod connecting screw thread, and is connected with slide rod through slide rod connecting screw thread, and slide hammer is sleeved on the slide rod.

[0007] Further, the end of slide rod away from top screw rod is provided with a knocking plane.

[0008] Further, the outer side of the knocking plane is provided with a slide rod handle, which can be used for holding and righting.

[0009] Further, the hook claw fastening screw thread is provided with a hook claw fastening nut.

[0010] Further, the crescent plate is a semicircular plate with an arc of 180 degrees, and three hook claws are evenly lapped on the two crescent plates respectively.

[0011] Further, the inner and outer rings of the crescent plate are provided with a curled edge.

[0012] Further, one end of the hook claw is provided with a hook claw fastening screw thread, the hook claw fastening screw thread is screwed in the hook claw adjusting strip hole, and the other end is provided with an impeller hook claw to adapt to more impellers.

[0013] The utility model has the advantages of:

[0014] The drawing device can greatly improve the convenience of disassembling the impeller, can protect the impeller from being damaged, greatly reduces the working time and labor intensity, and realizes the requirement of standardized management of equipment.

[0015] The drawing device can solve the problem of difficult disassembly of the centrifugal pump impeller, does not need to transform the centrifugal pump, facilitates the disassembly of the centrifugal pump impeller, reduces the working time and labor intensity, and improves the convenience of disassembling the centrifugal pump impeller; the hook claws are designed in a semicircular shape, six impeller hook claws are arranged, the six impeller hook claws can prevent the hook claws from being pulled out, and the impeller can be prevented from being damaged. BRIEF DESCRIPTION OF DRAWINGS

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

[0017] Figure 2 is a structural schematic view of the utility model embodiment 1;

[0018] Figure 3 is a structural schematic view of the utility model embodiment 2;

[0019] Figure 4 is a slide rod part schematic view of the utility model;

[0020] Figure 5A is a slide hammer part side view of the utility model;

[0021] Figure 5B is a slide hammer part front view of the utility model;

[0022] Figure 6 is a top screw rod part schematic view of the utility model;

[0023] Figure 7A is a screw rod crossbeam part side view of the utility model;

[0024] Figure 7B is a screw rod crossbeam part front view of the utility model;

[0025] Figure 8A is a pull rod part side view of the utility model;

[0026] Figure 8B is a pull rod part top view of the utility model;

[0027] Figure 9A is a crescent plate part front view of the utility model;

[0028] Figure 9B is a crescent plate part side view of the utility model;

[0029] Figure 10 The utility model discloses a hook claw part schematic view.

[0030] In the drawing: 1, slide bar, 2, slide hammer, 3, top screw rod, 4, screw beam, 5, pull rod, 6, hook claw fastening nut, 7, hook claw, 8, crescent plate, 9, slide bar handle, 10, knock plane, 11, slide bar connecting thread, 12, top screw thread, 13, pull rod lap joint square hole, 14, hook claw connecting thread, 15, impeller hook claw, 16, hook claw fastening thread, 17, hook claw adjusting strip hole. DETAILED DESCRIPTION

[0031] The utility model will be described in detail below in connection with the drawings and specific embodiment.

[0032] The utility model discloses a kind of puller when centrifugal pump impeller is dismantled, impeller is equipped in centrifugal pump shaft head, center hole is equipped in shaft head end face, when disassembling, this device is overlapped with impeller back, top screw rod 3 is overlapped with pump shaft center hole, when disassembling, only need to tighten top screw rod 3 clockwise, make impeller out. If impeller still cannot out, slide hammer 2 is sleeved on slide bar 1, slide bar 1 is connected to the head thread of top screw rod 3 clockwise, when using, tighten top screw rod 3 clockwise, make this device tightly pump shaft, slide hammer 2 again, make slide hammer 2 knock knock plane, so under the action of double power of tight and knock simultaneously, make impeller more easily out. Under the condition that impeller is not under great stress, slide bar 1 slide hammer 2 can also be connected with screw beam, slide hammer 2 makes impeller out.

[0033] This device can solve the problem that centrifugal pump impeller is difficult to take out, the utility model does not need to transform centrifugal pump, facilitates the taking out of centrifugal pump impeller, reduces work length and artificial strength, improves the convenience of centrifugal pump impeller disassembly;This impeller puller is equipped with six adjustable hook claws in circumference, with pull rod 5 center top screw as center, six hook claws can move along radial of center point, preferably improve the versatility of the tool, six claw structure makes the force receiving surface of impeller back increase and force more evenly, prevent pulling bad impeller. Another two crescent plates 8, to improve structural strength, the inner and outer rings of crescent plate are provided with flanging.

[0034] The utility model has the advantages of high safety factor, time and labor saving, low cost and the like.

[0035] The utility model will be described in detail below in connection with the drawings and embodiment.

[0036] Example 1

[0037] For the puller when centrifugal pump impeller is dismantled, as Figure 2As shown, including the screw beam 4, both ends of the screw beam 4 are connected with the pull rod 5 through the pull rod lap square hole 13, both ends of the pull rod 5 are connected with the crescent plate 8 through the hook connection thread 14, the crescent plate 8 is uniformly provided with three hook adjusting strip holes 17, the hook adjusting strip hole 17 is connected with the hook 7 through the hook fastening thread 16, the middle part of the screw beam 4 is provided with the top screw thread 12, and the top screw thread 12 is connected with the top screw rod 3. Figure 7A 、 Figure 7B and Figure 8A 、 Figure 8B As shown, the crescent plate 8 is uniformly provided with three hook adjusting strip holes 17, the hook adjusting strip hole 17 is connected with the hook 7 through the hook fastening thread 16, the middle part of the screw beam 4 is provided with the top screw thread 12, and the top screw thread 12 is connected with the top screw rod 3. Figure 6 As shown.

[0038] Example 2

[0039] The drawing device for disassembling the centrifugal pump impeller, as shown in Figure 3 , including the screw beam 4, both ends of the screw beam 4 are connected with the pull rod 5 through the pull rod lap square hole 13, both ends of the pull rod 5 are connected with the crescent plate 8 through the hook connection thread 14, the crescent plate 8 is uniformly provided with three hook adjusting strip holes 17, the hook adjusting strip hole 17 is connected with the hook 7 through the hook fastening thread 16, the middle part of the screw beam 4 is provided with the top screw thread 12, and the top screw thread 12 is connected with the top screw rod 3. Figure 4 and Figure 5A 、 Figure 5B As shown.

[0040] Example 3

[0041] As shown in Figure 1 , the drawing device for disassembling the centrifugal pump impeller, as shown in Figure 1 , including the screw beam 4, both ends of the screw beam 4 are connected with the pull rod 5 through the pull rod lap square hole 13, both ends of the pull rod 5 are connected with the crescent plate 8 through the hook connection thread 14, the crescent plate 8 is uniformly provided with three hook adjusting strip holes 17, the hook adjusting strip hole 17 is connected with the hook 7 through the hook fastening thread 16, the middle part of the screw beam 4 is provided with the top screw thread 12, and the top screw thread 12 is connected with the top screw rod 3.

[0042] As shown in Figure 9A 、 Figure 9B and Figure 10As shown, the crescent plate 8 is a semi-circular arc plate with an arc of 180 degrees. Three hooks are evenly overlapped on each of the two crescent plates 8, and the inner and outer rings of the crescent plates 8 are provided with rolled edges.

[0043] One end of the hook 7 is provided with a hook fastening thread 16, which is screwed into the hook adjusting strip hole 17. The other end is provided with an impeller hook 15 to accommodate more impellers.

[0044] Example 4

[0045] like Figure 1 As shown, this embodiment is a device for disassembling the centrifugal pump impeller by attaching it to the centrifugal pump impeller. This device is composed of a slide rod 1, a slide hammer 2, a top screw rod 3, a screw beam 4, a pull rod 5, a hook fastening nut 6, a hook 7, and a crescent plate 8.

[0046] A hook 7 is attached to the impeller of the centrifugal pump, so that the impeller hook 15 is placed on the impeller back plate. The left end of the hook 7 is provided with a hook fastening thread 16, which overlaps with the hook adjusting strip hole 17 on the crescent plate 8. A hook fastening nut 6 is provided at the hook fastening thread 16. The crescent plate 8 and the pull rod 5 are connected by a hook connecting thread 14. The left end of the pull rod 5 is provided with a pull rod overlapping square hole 13, which overlaps with the lead screw beam 4. The middle part of the lead screw beam 4 is provided with a set screw thread 12, which is connected to the set screw rod 3. The left end of the set screw rod 3 is provided with an external hexagon. The left end face of the set screw rod 3 is provided with a slide rod connecting thread 11, which is connected to the slide rod 1. The slide rod 1 is provided with a slide hammer 2, which can strike the striking surface 10 on the slide rod. The left end of the slide rod 1 is provided with a slide rod handle 9. During disassembly, the device is connected to the back of the impeller, and the top screw 3 is connected to the center hole of the pump shaft. Disassembly simply requires tightening the top screw 3 clockwise to dislodge the impeller. If the impeller still cannot be dislodged, the sliding hammer 2 is fitted onto the sliding rod 1, and the sliding rod 1 is connected clockwise to the sliding rod connecting thread 11. During use, hold the sliding rod handle 9 and tighten the top screw 3 clockwise to tighten the device against the pump shaft. Then slide the sliding hammer 2 to strike the striking surface 10. This combination of tightening and striking forces makes it easier for the impeller to dislodge. If the impeller is not under significant force, the sliding rod 1 and sliding hammer 2 can also be connected to the top screw thread 12 of the screw beam 4, and sliding the sliding hammer 2 will dislodge the impeller. The hook 6 is designed in a semi-circular shape and has six impeller hooks 15. These six impeller hooks 15 prevent the hook 6 from dislodging, thus avoiding impeller damage. This invention has advantages such as high safety, time and labor saving, and low cost.

[0047] The operation steps in this embodiment are as follows:

[0048] (1) Connect the hook claw connecting thread of the pull rod 5 clockwise to the hook claw connecting thread 14 of the crescent plate;

[0049] (2) The fastening thread of the claw 7 is overlapped with the claw adjusting strip hole 17 and the claw fastening nut 6 is tightened clockwise;

[0050] (3) The top wire thread 12 of the top wire rod 3 is connected with the top wire thread 12 of the screw beam 4 clockwise;

[0051] (4) The pull rod overlapping side hole 13 of the left end of the pull rod 5 is overlapped with the screw beam 4;

[0052] (5) The slide hammer 2 is sleeved on the slide rod 1;

[0053] (6) The impeller claw 15 is overlapped with the back of the impeller;

[0054] (7) The slide rod handle 9 is held by hand, and the top wire rod 3 is tightened and clamped tightly clockwise by using a wrench;

[0055] (8) The slide hammer 2 is used to knock the knocking plane 10 on the slide rod 1;

[0056] (9) When the top wire rod 3 is loosened, the top wire rod 3 is tightened again, and steps (7) and (8) are repeated until the impeller is removed.

Claims

1. A pulling device for dismounting a centrifugal pump impeller, characterized in that, Including screw beam (4), both ends of the screw beam (4) are connected with pull rod (5) through pull rod lap joint square hole (13), the two pull rods (5) are connected with crescent plate (8) through hook claw connection thread (14) at the end, the crescent plate (8) is uniformly provided with three hook claw adjusting strip holes (17), the hook claw adjusting strip holes (17) are connected with hook claw (7) through hook claw fastening thread (16), the screw beam (4) is provided with top screw thread (12) in the middle and is connected with top screw rod (3) through top screw thread (12).

2. The pulling device for disassembling a centrifugal pump impeller according to claim 1, characterized in that, The other end of the top screw rod (3) is provided with slide rod connecting thread (11) and is connected with slide rod (1) through slide rod connecting thread (11), the slide rod (1) is provided with slide hammer (2).

3. The pulling device for disassembling a centrifugal pump impeller according to claim 2, characterized in that, The end of the slide rod (1) away from the top screw rod (3) is provided with a knocking plane (10).

4. The pulling device for disassembling a centrifugal pump impeller according to claim 3, characterized in that, The outer side of the knocking plane (10) is provided with a slide rod handle (9), which can be used for hand holding and righting.

5. The puller device for disassembling a centrifugal pump impeller according to claim 1, characterized in that, The hook claw fastening thread (16) is provided with a hook claw fastening nut (6).

6. The puller device for disassembly of a centrifugal pump impeller according to claim 1, characterized in that, The crescent plate (8) is a semicircular arc plate with an arc of 180 degrees, and three hook claws are uniformly lapped on each of the two crescent plates (8).

7. The pulling device for disassembling a centrifugal pump impeller according to claim 6, characterized in that, The inner and outer rings of the crescent plate (8) are provided with curled edges.

8. The pulling device for disassembling a centrifugal pump impeller according to claim 6, characterized in that, One end of the hook claw (7) is provided with a hook claw fastening thread (16), and the other end is provided with an impeller hook claw (15) to adapt to more impellers.

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