A positioning tool for disassembling and assembling the pump shaft head lock nut

Abstract

The utility model discloses a positioning tool for disassembling and assembling a pump shaft head lock nut, comprising a support frame body, the support frame body comprising a support bottom plate and a limit end plate connected together, the support bottom plate is provided with a support arc plate and a base gasket supporting a pump casing, the arc surface of the support arc plate is arranged corresponding to the outer surface of the pump casing, the base gasket is provided with a cavity arranged in a vertical direction, the cavity is arranged corresponding to the oil drain plug on the pump, and the size of the cavity is larger than the size of the oil drain plug; the limit end plate is arranged corresponding to the backrest wheel of the pump, and the backrest wheel is connected to the limit end plate through a connecting piece. The positioning tool for disassembling and assembling a pump shaft head lock nut of the utility model improves the work efficiency of disassembling and assembling the shaft head lock nut and improves the maintenance progress of the pump.

Description

Technical Field

[0001] The utility model relates to the technical field of water pump disassembly and assembly auxiliary devices, in particular to a positioning tool for disassembly and assembly of a pump shaft head lock nut. Background Art

[0002] The pump of the steam-water separation reheater system for nuclear power is used to provide system pressure for the conveying medium. Figure 1 As shown, the pump includes a pump housing 01 and a pump shaft 03 rotatably connected to the pump housing 01. One end of the pump shaft 03 is connected to the impeller 05 through the shaft head lock nut 06, and the other end is connected to the backrest wheel 02. The bottom of the pump housing 01 is provided with an oil drain plug 04. When the pump is disassembled for maintenance, the installation of the shaft head lock nut 06 used to install the impeller 05 is one of the important links to ensure the availability of the equipment. The installation torque of the shaft head lock nut 06 of the pump is relatively large, reaching more than 1000N.m. In order to prevent the shaft head lock nut 06 from loosening, so that the rotation direction of the pump is opposite to the installation direction of the shaft head lock nut 06, the torque value of the shaft head lock nut 06 will increase during the operation of the pump. Therefore, in the process of disassembling the shaft head lock nut 06 of the pump during pump maintenance, the shaft head lock nut 06 of the pump is difficult to disassemble, which seriously affects the progress of on-site maintenance. Utility Model Content

[0003] In view of this, the utility model provides a positioning tool for disassembling and assembling a pump shaft head lock nut, which improves the work efficiency of disassembling and assembling the shaft head lock nut and improves the maintenance progress of the pump.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A positioning tool for disassembling and assembling a pump shaft head lock nut, comprising a support frame body, the support frame body comprising a support bottom plate and a limit end plate connected together, the support bottom plate is provided with a support arc plate and a base gasket for supporting a pump housing, the arc surface of the support arc plate is arranged corresponding to the outer surface of the pump housing, the base gasket is provided with a cavity arranged in a vertical direction, the cavity is arranged corresponding to the oil drain plug on the pump, and the size of the cavity is larger than the size of the oil drain plug;

[0006] The limiting end plate is arranged corresponding to the back wheel of the pump, and the back wheel is connected to the limiting end plate through a connecting piece.

[0007] Optionally, a first connecting through hole is provided on the limiting end plate, and the setting position of the first connecting through hole corresponds to the second connecting through hole on the backrest wheel.

[0008] Optionally, four second connecting through holes are provided, and the four second connecting through holes are evenly distributed around the axis of the backrest wheel, and the first connecting through hole is a cross-shaped through hole, and each long hole of the cross-shaped through hole corresponds to one second connecting through hole;

[0009] The center of the cross-shaped through hole is arranged correspondingly to the center of the backrest wheel.

[0010] Optionally, a positioning hole plate is further included, wherein the positioning hole plate is arranged on a side of the limiting end plate away from the backrest wheel, and a third connecting through hole is arranged on the positioning hole plate, and the third connecting through hole is arranged corresponding to the first connecting through hole.

[0011] Optionally, the third connecting through hole is a cross-shaped through hole.

[0012] Optionally, the connecting member is a stud and a locking nut, the stud is passed through the limiting end plate and the backrest wheel, and both ends of the stud are connected to the locking nut;

[0013] Alternatively, the connecting member is a connecting bolt and a connecting nut that are arranged in coordination with each other, the connecting bolt passes through the limiting end plate and the backrest wheel, and the tail end of the connecting bolt is connected to the connecting nut.

[0014] Optionally, the supporting arc plate is arranged close to the limiting end plate.

[0015] Optionally, the support frame further comprises an auxiliary end plate and two oppositely arranged side plates, the auxiliary end plate being arranged at one end of the support bottom plate away from the limiting end plate, and the spacing distance between the auxiliary end plate and the limiting end plate is greater than the length of the pump;

[0016] The two side plates are respectively arranged on both sides of the supporting bottom plate and are used to connect the auxiliary end plate and the limiting end plate.

[0017] Optionally, the height of the side plate is the same as the height of the edge of the supporting arc plate close to the side plate;

[0018] Alternatively, the height of the side plate is the same as the height of the limiting end plate.

[0019] Optionally, the aperture of the cavity is larger than the diameter of the oil drain plug, and the height of the cavity is larger than the length of the oil drain plug.

[0020] It can be seen from the above technical scheme that the positioning tool for disassembly and assembly of the pump shaft head lock nut provided by the utility model realizes the support of the pump by setting a supporting arc plate and a base gasket that support the pump housing, and realizes the limitation of the backrest wheel by setting a limiting end plate connected to the backrest wheel of the pump, thereby realizing the limitation of the pump shaft fixedly connected to the backrest wheel, which is convenient for the installation and disassembly of the shaft head lock nut connected to the end of the pump shaft. The positioning tool for disassembly and assembly of the pump shaft head lock nut provided by the utility model facilitates the disassembly of the shaft head lock nut at the end of the pump shaft by limiting the pump shaft, thereby greatly improving the maintenance progress of the on-site pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 It is a schematic diagram of the structure of a pump in the prior art;

[0023] Figure 2 A schematic structural diagram of an angle of a positioning tool for disassembling and assembling a pump shaft head lock nut provided in an embodiment of the utility model;

[0024] Figure 3 A schematic cross-sectional view of a positioning tool for disassembling and assembling a pump shaft head lock nut provided in an embodiment of the utility model;

[0025] Figure 4 A schematic diagram of the structure of a pump provided by an embodiment of the utility model, wherein a positioning tool for disassembling and assembling a pump shaft head lock nut is used to place a pump;

[0026] Figure 5 A schematic diagram of the structure of a limit end plate provided in one embodiment of the utility model;

[0027] Figure 6 A schematic structural diagram of a position limiting end plate provided in another embodiment of the utility model;

[0028] Figure 7 For this utility model Figure 5 or Figure 6 A schematic side view of the structure of the limiting end plate provided in the embodiment;

[0029] Figure 8 A schematic structural diagram of an angle of a positioning hole plate provided in an embodiment of the utility model;

[0030] Fig. 9 A schematic structural diagram of a positioning hole plate provided by an embodiment of the utility model from another angle;

[0031] Fig.10 This is a schematic structural diagram of the positioning hole plate, the limiting end plate and the backrest wheels provided in an embodiment of the utility model after installation (with the studs removed).

[0032] in:

[0033] 01. Pump housing, 02. Backrest wheel, 03. Pump shaft, 04. Oil drain plug, 05. Impeller, 06. Shaft head lock nut,

[0034] 1. Support bottom plate, 2. Support arc plate, 3. Stud, 4. Positioning hole plate, 401. Third connecting through hole, 5. Limiting end plate, 501. First connecting through hole, 6. First nut, 7. Base washer, 701. Cavity, 8. Second nut, 9. Auxiliary end plate, 10. Side plate. DETAILED DESCRIPTION

[0035] The utility model discloses a positioning tool for disassembling and assembling a pump shaft head lock nut, which improves the working efficiency of disassembling and assembling the shaft head lock nut and improves the maintenance progress of the pump.

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] See also Figures 2 to 9 The utility model of the positioning tool for disassembly and assembly of the pump shaft head lock nut comprises a support frame, which comprises a support bottom plate 1 and a limiting end plate 5 connected together. The support bottom plate 1 is provided with a support arc plate 2 and a base gasket 7 for supporting the pump housing 01. The arc surface of the support arc plate 2 is arranged corresponding to the outer surface of the pump housing 01. The base gasket 7 is provided with a cavity 701 arranged in the vertical direction. The cavity 701 is arranged corresponding to the oil drain plug 04 on the pump. The size of the cavity 701 is larger than the size of the oil drain plug 04, so that when the pump housing 01 is placed on the support arc plate 2, the oil drain plug 04 is placed in the cavity 701, and the top of the base gasket 7 supports the pump housing 01. The limiting end plate 5 is arranged corresponding to the backrest wheel 02 of the pump, and the backrest wheel 02 is connected to the limiting end plate 5 through a connecting piece.

[0038] The limiting end plate 5 is vertically supported by the bottom plate 1. The aperture of the cavity 701 is larger than the diameter of the oil drain plug 04, and the height of the cavity 701 is larger than the length of the oil drain plug 04, so that the oil drain plug 04 is conveniently placed on the base gasket 7.

[0039] The positioning tool for disassembling and assembling the pump shaft head lock nut of the utility model realizes the support of the pump by providing the support arc plate 2 and the base gasket 7 supporting the pump housing 01, and realizes the limitation of the backrest wheel 02 by providing the limiting end plate 5 connected to the backrest wheel 02 of the pump, thereby realizing the limitation of the pump shaft 03 fixedly connected to the backrest wheel 02, and facilitating the installation and disassembly of the shaft head lock nut 06 connected to the end of the pump shaft 03. The positioning tool for disassembling and assembling the pump shaft head lock nut of the utility model facilitates the disassembly of the shaft head lock nut 06 at the end of the pump shaft 03 by limiting the pump shaft 03, thereby greatly improving the maintenance progress of the on-site pump.

[0040] In order to facilitate the connection with the backrest wheel 02, a first connecting through hole 501 is provided on the limiting end plate 5. Figures 5 to 7 As shown, the setting position of the first connecting through hole 501 corresponds to the second connecting through hole on the backrest wheel 02.

[0041] Specifically, the second connecting through holes are cylindrical through holes, and four of them are arranged evenly around the axis of the backrest wheel 02. Figure 5 As shown, the first connecting through hole 501 is a cross-shaped through hole, and the cross-shaped through hole includes four long holes arranged in communication, and each long hole corresponds to one of the second connecting through holes. The center of the cross-shaped through hole is arranged corresponding to the center of the backrest wheel 02. In another embodiment, as Figure 6 As shown, the first connecting through hole 501 is an elongated hole, each of the elongated holes is arranged corresponding to one of the second connecting through holes, and the length direction of the elongated holes is arranged along the radial direction of the backrest wheel 02. Figure 5 and Figure 6 The side view structure of the limiting end plate 5 is the same as that of Figure 7 As shown, the limiting end plate 5 is a rectangular or square plate. By setting the first connecting through hole 501 as a long hole or a slotted hole, the positioning range of the limiting end plate 5 is expanded, and it can be applied to the backrest wheel 02 with the second connecting through hole set at different axle spacings, and the application range is wider.

[0042] In order to improve the reliability of the backrest wheel 02, the pump shaft head lock nut disassembly and assembly positioning tool of the utility model also includes a positioning hole plate 4. The positioning hole plate 4 is arranged on the side of the limiting end plate 5 away from the backrest wheel 02, and the positioning hole plate 4 is attached to the limiting end plate 5. The positioning hole plate 4 is provided with a third connecting through hole 401, such as Figure 8 As shown, the third connection through hole 401 is arranged corresponding to the first connection through hole 501. Further, the third connection through hole 401 is a cross-shaped through hole.

[0043] Specifically, the connecting member is a stud 3 and a locking nut. The stud 3 is inserted through the first connecting through hole 501 on the limiting end plate 5 and the second connecting through hole on the backrest wheel 02. Both ends of the stud 3 are connected to the locking nut. The locking nut includes a first nut 6 and a second nut 8. The second nut 8 is connected to one end of the stud 3, and the first nut 6 is connected to the other end of the stud 3.

[0044] In another embodiment, the connecting member is a connecting bolt and a connecting nut that are arranged in combination. The connecting bolt passes through the first connecting hole 501 on the limiting end plate 5 and the second connecting hole on the backrest wheel 02, and the tail end of the connecting bolt is connected to the connecting nut.

[0045] In order to improve the reliability of the limit, the support frame also includes an auxiliary end plate 9 and two oppositely arranged side plates 10. The auxiliary end plate 9 is arranged at one end of the support base plate 1 away from the limit end plate 5. The distance between the auxiliary end plate 9 and the limit end plate 5 is greater than the length of the pump, so as to facilitate the placement of the pump into the support frame. The two side plates 10 are arranged on both sides of the support base plate 1. The side plates 10 are used to connect the auxiliary end plate 9 and the limit end plate 5. The support frame includes a shell structure with a sealed bottom end and an open top end, which is surrounded by the support base plate 1, the auxiliary end plate 9, the limit end plate 5 and the two side plates 10. The support arc plate 2 is arranged at a position of the support base plate 1 close to the limit end plate 5, and the support arc plate 2 is fixedly connected to the support base plate 1.

[0046] The height of the side plate 10 is the same as the height of the edge of the supporting arc plate 2 close to the side plate 10. Alternatively, the height of the side plate 10 is the same as the height of the limiting end plate 5. The specific height of the side plate 10 is set by those skilled in the art according to actual use needs and will not be repeated here.

[0047] The use process of the positioning tool for disassembling and assembling the pump shaft head lock nut of the utility model is as follows: Figure 1 The pump is hoisted into the corresponding position of the support arc plate 2 and the base gasket 7 of the support frame. It should be noted that the position of the oil drain plug 04 must be aligned with the position of the base gasket 7. Rotate the pump shaft 03 to align the second connecting through hole on the backrest wheel 02 on the pump side with the first connecting through hole 501 and the third connecting through hole 401. Use the stud 3, the first nut 6 and the second nut 8 to fix the backrest wheel 02 with the limit end plate 5 and the positioning hole plate 4. Finally, use a wrench to remove the shaft head lock nut 06 used to fix the impeller 05. Use a wrench to tighten in the opposite direction during installation.

[0048] The utility model discloses a positioning tool for disassembling and assembling a pump shaft head lock nut, which improves the work efficiency of disassembling and assembling the shaft head lock nut, solves the problem that on-site equipment cannot fix the pump shaft, making it difficult to disassemble the shaft head lock nut, and reduces the risk of equipment damage caused by improper operation.

[0049] In the description of this solution, it should be understood that the terms "upper", "lower", "vertical", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this solution.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this solution, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0051] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0052] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A positioning tool for disassembling and assembling a pump shaft head lock nut, characterized in that: The support frame comprises a support base plate and a limit end plate connected together, the support base plate is provided with a support arc plate and a base gasket for supporting a pump housing, the arc surface of the support arc plate is arranged corresponding to the outer surface of the pump housing, the base gasket is provided with a cavity arranged in a vertical direction, the cavity is arranged corresponding to the oil drain plug on the pump, and the size of the cavity is larger than the size of the oil drain plug; The limiting end plate is arranged corresponding to the back wheel of the pump, and the back wheel is connected to the limiting end plate through a connecting piece.

2. The positioning tool for disassembling and assembling the pump shaft head lock nut according to claim 1, characterized in that: The limiting end plate is provided with a first connecting through hole, and the setting position of the first connecting through hole is corresponding to the second connecting through hole on the backrest wheel.

3. The positioning tool for disassembling and assembling the pump shaft head lock nut according to claim 2, characterized in that: There are four second connecting through holes, which are evenly distributed around the axis of the backrest wheel, and the first connecting through hole is a cross-shaped through hole, and each long hole of the cross-shaped through hole corresponds to one second connecting through hole; The center of the cross-shaped through hole is arranged correspondingly to the center of the backrest wheel.

4. The positioning tool for disassembling and assembling the pump shaft head lock nut according to claim 2, characterized in that: It also includes a positioning hole plate, which is arranged on a side of the limiting end plate away from the backrest wheel, and a third connecting through hole is arranged on the positioning hole plate, and the third connecting through hole is arranged corresponding to the first connecting through hole.

5. The positioning tool for disassembling and assembling the pump shaft head lock nut according to claim 4, characterized in that: The third connecting through hole is a cross-shaped through hole.

6. The positioning tool for disassembling and assembling the pump shaft head lock nut according to claim 1, characterized in that: The connecting piece is a stud and a locking nut, the stud is passed through the limiting end plate and the backrest wheel, and both ends of the stud are connected to the locking nut; Alternatively, the connecting member is a connecting bolt and a connecting nut that are arranged in coordination with each other, the connecting bolt passes through the limiting end plate and the backrest wheel, and the tail end of the connecting bolt is connected to the connecting nut.

7. The positioning tool for disassembling and assembling the pump shaft head lock nut according to claim 1, characterized in that: The supporting arc plate is arranged close to the limiting end plate.

8. The positioning tool for disassembling and assembling the pump shaft head lock nut according to claim 1, characterized in that: The support frame body further comprises an auxiliary end plate and two oppositely arranged side plates, wherein the auxiliary end plate is arranged at one end of the support bottom plate away from the limiting end plate, and the spacing distance between the auxiliary end plate and the limiting end plate is greater than the length of the pump; The two side plates are respectively arranged on both sides of the supporting bottom plate and are used to connect the auxiliary end plate and the limiting end plate.

9. The positioning tool for disassembling and assembling the pump shaft head lock nut according to claim 8, characterized in that: The height of the side plate is the same as the height of the edge of the supporting arc plate close to the side plate; Alternatively, the height of the side plate is the same as the height of the limiting end plate.

10. The positioning tool for disassembling and assembling the pump shaft head lock nut according to claim 1, characterized in that: The aperture of the cavity is greater than the diameter of the oil drain plug, and the height of the cavity is greater than the length of the oil drain plug.

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