Lead pump device for lead-acid storage battery grid continuous casting production line
By using graphite transition sleeves, limit sleeves, limit washers and pump bodies, the positioning accuracy and thermal expansion problems in the lead pump device are solved, the service life is extended, the maintenance cost is reduced, and the stability of the impeller is ensured.
Patent Information
- Application Number
- CN202421749707.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-07-23
AI Technical Summary
In existing lead pump devices, the positioning accuracy of the pump shaft and pump body is difficult to ensure, thermal expansion leads to damage to the impeller, deep groove ball bearings are easily damaged, and metal transition sleeves are frequently replaced, which increases the cost of use.
The transition sleeve and limit sleeve of graphite material, and the limit washers are used to cooperate with the pump body to replace the traditional metal sleeve to realize the radial and axial limit of the pump shaft, avoid the positioning of deep groove ball bearings, improve positioning accuracy, simplify the structure, and extend the service life.
It improves the service life of the pump shaft and pump body, reduces the frequency of replacement of metal sleeves, reduces maintenance costs, ensures that the impeller is not damaged, and the lubrication effect improves the durability of the limit parts.
Smart Images
Figure CN223203263U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pump bodies and relates to a lead pump device used in a lead-acid battery grid continuous casting production line. Background Art
[0002] Lead-acid battery grid continuous casting technology, currently the most economical and environmentally friendly method for producing grids, has gained widespread recognition among lead-acid battery manufacturers. A lead pump is a device used in continuous casting production lines to supply liquid lead to the mold.
[0003] In the prior art, the pump shaft of a lead pump relies on the fit between the deep groove ball bearing mounted on the upper portion of the pump shaft and the pump sleeve to achieve positioning. The impeller is mounted on the lower portion of the pump shaft and is indirectly positioned by the fit between the pump shaft, pump sleeve, and pump body. The impeller's positioning accuracy is determined by the machining accuracy of the pump shaft, pump sleeve, and pump body, as well as the overall assembly accuracy. However, the relatively long pump shaft and pump sleeve increase the difficulty of ensuring machining and assembly accuracy. Furthermore, since the lead pump operates in lead liquid at approximately 450°C, the pump sleeve and pump shaft experience thermal expansion. The longer the pump sleeve and pump shaft, the greater the thermal expansion. Furthermore, the actual expansion of the pump shaft and pump sleeve differs, with the pump shaft typically expanding more than the pump sleeve. Consequently, over time, the impeller mounted on the bottom of the pump shaft may rub against the cover plate at the bottom of the pump body, causing damage to the impeller. Furthermore, due to high-temperature operation, the deep groove ball bearing at the top of the pump shaft is susceptible to damage. Once damaged, the pump shaft falls, and the impeller mounted on the bottom of the pump shaft follows, causing contact and friction with the cover plate at the bottom of the pump body, resulting in damage to the impeller. At the same time, in order to avoid damage caused by direct friction between the pump shaft and the pump body, a metal transition sleeve is installed on the pump shaft and the pump body. There is no relative rotation between the pump shaft, the pump body and the metal transition sleeve. When the pump is working, the two metal transition sleeves are in contact and friction. After damage, only the metal transition sleeve is replaced. Therefore, the transition sleeve is a wearing part and will be replaced frequently. Two metal transition sleeves will increase the replacement frequency and increase the cost of use.
[0004] In order to solve the above problems, a lead pump device with a different pump shaft supporting structure is needed. Utility Model Content
[0005] In view of this, the utility model provides a lead pump device for a lead-acid battery grid continuous casting production line. The support and positioning of the pump shaft can be completed by relying on a transition connecting component. The limit sleeve, gasket and pump body cooperate to improve the positioning accuracy. The deep groove ball bearing is no longer used to position the pump shaft. After the deep groove ball bearing is damaged, the pump shaft will no longer fall and will no longer cause damage to the impeller. The transition sleeve made of graphite replaces the two metal sleeves between the traditional pump shaft and the pump body. While improving the service life of the pump shaft and the pump body, it also simplifies the structure and saves costs.
[0006] The utility model provides a lead pump device for a lead-acid battery grid continuous casting production line, comprising a pump body assembly, a pump shaft and a transition connection member. The pump body assembly comprises a pump body, the pump body is provided with a mounting hole, and the pump shaft is mounted in the mounting hole through the transition connection member in a manner that it can rotate around its own axis.
[0007] Furthermore, the transition connection component includes a transition sleeve and a limit sleeve, the mounting hole has a first limit portion, the transition sleeve is mounted on the first limit portion, and the pump shaft is passed through the transition sleeve; the limit sleeve is mounted on the pump shaft and is located axially above the transition sleeve, and the bottom surface of the limit sleeve is against the pump body to limit the pump shaft axially to the pump body.
[0008] Furthermore, the pump body assembly also includes an impeller, the pump body is provided with an inner cavity communicated with the mounting hole, the impeller is arranged in the inner cavity, and the pump shaft extends axially to the inner cavity and is connected to the impeller.
[0009] Furthermore, the transition connection member also includes a first limiting washer and a second limiting washer, and the mounting hole also has a second limiting portion and a third limiting portion, the second limiting portion and the third limiting portion are respectively arranged at the two axial ends of the first limiting portion, the first limiting washer is arranged in the second limiting portion and is located between the transition sleeve and the limiting sleeve, and the bottom surface of the limiting sleeve is against the top surface of the first limiting washer; the second limiting washer is arranged in the third limiting portion and is located between the impeller and the limiting sleeve.
[0010] Furthermore, a mounting portion is provided at the end of the pump shaft, and the mounting portion passes through the limiting sleeve, the first limiting washer, the transition sleeve and the second limiting washer in sequence and is then connected to the impeller.
[0011] Furthermore, the pump body assembly also includes an upper cover plate, a sleeve and a bearing mounting seat. The upper cover plate and the bearing mounting seat are respectively installed at the two axial ends of the sleeve. The sleeve outer sleeve is connected to the pump shaft, and the upper cover plate is installed on the top surface of the pump body.
[0012] Furthermore, the pump body assembly also includes a lower cover plate and a filter screen. The lower cover plate is installed on the bottom surface of the pump body to close the inner cavity. The lower cover plate is provided with a lead inlet for the entry of lead liquid, and the filter screen is installed at the lead inlet.
[0013] Furthermore, the impeller includes an impeller body and blades formed on the impeller body, and the pump body is provided with a lead outlet hole that cooperates with the impeller and is used to output the lead liquid from the pump body.
[0014] Furthermore, it also includes a bearing assembly installed on the bearing mounting seat, and the upper end of the pump shaft axially passes through the bearing assembly.
[0015] Furthermore, the transition sleeve is made of graphite material.
[0016] Beneficial effects of the utility model:
[0017] The utility model discloses a lead pump device for a lead-acid battery grid continuous casting production line. The support and positioning of the pump shaft can be completed by relying on a transition connection member. The limiting sleeve, two limiting washers and the pump body cooperate to improve the positioning accuracy. The pump shaft is no longer positioned by a deep groove ball bearing. After the deep groove ball bearing is damaged, the pump shaft will no longer fall and the impeller will no longer be damaged. A transition sleeve made of graphite material that is high temperature resistant, wear-resistant, and has a certain lubricity but is not as hard as the pump shaft and pump body is used to replace the two metal sleeves between the traditional pump shaft and the pump body. While improving the service life of the pump shaft and the pump body, it also simplifies the structure and saves costs. The mounting hole is connected to the inner cavity, so that during the process of pumping the lead liquid, the limiting sleeve and the two limiting washers can be immersed in the high-temperature lead liquid, which can play a lubricating role on the limiting sleeve, the two limiting washers and the pump body, and can effectively improve the service life of the limiting sleeve, the two limiting washers and the pump body as limiting parts. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is an isometric view of the present invention;
[0019] Figure 2 This is a schematic diagram of the main structure of the utility model;
[0020] Figure 3 for Figure 2 A partial enlarged view of point Ⅰ in the middle;
[0021] Figure 4 This is a schematic diagram of the main structure of the pump body of the utility model; DETAILED DESCRIPTION
[0022] It should be noted that, in the description of this specification, the terms "upper," "lower," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for the purpose of facilitating the description of the present invention and simplifying the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. The terms "head," "tail," and "front," "back," and "back" in this embodiment are based on the order of power transmission, i.e., the side to which power is first transmitted is considered the first. This is readily understood by those skilled in the art and will not be elaborated upon herein.
[0023] As shown in the figure, an embodiment of the present invention provides a lead pump device for a lead-acid battery grid continuous casting production line, including a pump body assembly, a pump shaft 6 and a transition connection member. The pump body assembly includes a pump body 8, and the pump body 8 is provided with a mounting hole. The pump shaft 6 is mounted in the mounting hole through the transition connection member in a manner that it can rotate around its own axis. In this embodiment, the transition connection member includes a transition sleeve 14 and a limiting sleeve 12. The transition sleeve 14 is made of graphite material. The mounting hole has a first limiting portion 802. The transition sleeve 14 is installed in the first limiting portion 802. The pump shaft 6 is passed through the transition sleeve 14. The limiting sleeve 12 is installed on the pump shaft 6 and is located axially above the transition sleeve 14. The bottom surface of the limiting sleeve 12 abuts against the pump body 8 to limit the pump shaft 6 axially to the pump body 8. In this embodiment, the radial and axial limitation of the pump shaft 6 is achieved by relying on the abutment between the limiting sleeve 12 and the pump body 8. At the same time, a transition sleeve 14 made of graphite material that is resistant to high temperature, wear-resistant, and has certain lubricity but not as hard as the pump shaft 6 and the pump body 8 is used to replace the two metal sleeves between the traditional pump shaft 6 and the pump body 8. While improving the service life of the pump shaft 6 and the pump body 8, it also simplifies the structure and saves costs. Moreover, the transition sleeve 14 also has a certain limiting effect in the radial direction, further limiting the pump shaft 6. Under this structure, when the pump shaft 6 rotates, it does not directly contact the pump body 8, but contacts the transition sleeve 14 with lower hardness, effectively extending the service life. It should be noted that during assembly, it is necessary to ensure that the pump shaft 6 can rotate smoothly in the mounting hole. Therefore, it cannot be an interference fit or other fixed connection that cannot be rotated. Instead, it is better for the surfaces to contact and fit each other without affecting the rotation.
[0024] In this embodiment, the pump body assembly further includes an impeller 9. The pump body 8 is provided with an inner cavity 804 communicating with the mounting hole. The impeller 9 is disposed in the inner cavity 804. The pump shaft 6 extends axially to the inner cavity 804 and is connected to the impeller 9. In this embodiment, the transition connection member further includes a first limiting washer 13A and a second limiting washer 13B. The mounting hole further has a second limiting portion 801 and a third limiting portion 803. The second limiting portion 801 and the third limiting portion 803 are respectively correspondingly disposed at the axial ends of the first limiting portion 802. The first limiting washer 13A is disposed on the second limiting portion 801 and is located between the transition sleeve 14 and the limiting sleeve 12. The bottom surface of the limiting sleeve 12 abuts against the top surface of the first limiting washer 13A. The second limiting washer 13B is disposed on the third limiting portion 803 and is located between the impeller 9 and the limiting sleeve 12. In this embodiment, the diameters of the second limiting portion 801 and the third limiting portion 803 are larger than those of the first limiting portion 802, so that the mounting hole forms a stepped hole with a small middle and large ends. The first limiting washer 13A and the second limiting washer 13B are respectively arranged in the second limiting portion 801 and the third limiting portion 803. The limiting sleeve 12 limits the pump shaft 6 in the axial direction by having its bottom surface fit against the top surface of the first limiting washer 13A. The second limiting washer 13B and the third limiting washer cooperate with the limiting sleeve 12 and the impeller 9 to further realize the positioning and limiting of the pump shaft 6. In addition, due to the presence of the limiting sleeve 12 and the first limiting washer 13A in the axial direction, no matter how it is used, the impeller 9 will not be damaged due to contact and friction between the impeller 9 and the cover plate at the bottom of the pump body 8.
[0025] In this embodiment, a mounting portion is provided at the end of the pump shaft 6. The mounting portion passes through the limiting sleeve 12, the first limiting washer 13A, the transition sleeve 14, and the second limiting washer 13B in sequence before being connected to the impeller 9. As shown in the figure, the diameter of the mounting portion in this embodiment is smaller than the diameter of the pump shaft 6 itself, so that the pump shaft 6 and the limiting sleeve 12 limit each other in the axial direction, further improving the overall connection reliability of the lead pump.
[0026] In this embodiment, the pump body assembly also includes an upper cover plate 7, a sleeve 5, and a bearing mounting seat 4. The upper cover plate 7 and the bearing mounting seat 4 are respectively mounted on the axial ends of the sleeve 5. The sleeve 5 is outer-circuited with the pump shaft 6, and the upper cover plate 7 is mounted on the top surface of the pump body 8. In this embodiment, a bearing assembly is also included that is mounted on the bearing mounting seat 4, and the upper end of the pump shaft 6 axially passes through the bearing assembly. As shown in the figure, the bearing assembly includes a seat bearing 1, a bearing retaining ring 2, and a deep groove ball bearing 3. In this embodiment, the bearing mounting seat 4, the sleeve 5, and the upper cover plate 7 are welded together to form an integral body. A boss is provided on the top surface of the pump body 8, and a mounting groove is provided on the bottom surface of the upper cover plate 7. The boss provided on the top surface of the pump body 8 is inserted into the mounting groove provided on the bottom surface of the upper cover plate 7. The seat bearing 1 is mounted on the top surface of the bearing mounting seat 4, and the deep groove ball bearing 3 is mounted in the bearing mounting seat 4. The bearing retaining ring 2 is mounted above the deep groove ball bearing 3 and below the seat bearing 1 to limit the deep groove ball bearing 3. The pump shaft 6 passes through the seat bearing 1, the bearing mounting seat 4, the bearing retaining ring 2, the deep groove ball bearing 3, the sleeve 5, the upper cover plate 7, the limit sleeve 12, the first limit washer 13A, the graphite transition sleeve 14, the second limit washer 13B and the impeller 9 from top to bottom. This ensures that the various parts on the pump shaft 6 are concentric and that the impeller 9 and the inner cavity 804 of the pump body 8 are concentric, reduces the friction between the various parts on the pump shaft 6 and the pump sleeve assembly weldments, and reduces the friction and collision between the impeller 9 and the inner cavity 804 of the pump body 8.
[0027] In this embodiment, the pump body assembly also includes a lower cover plate 10 and a filter screen 11. As shown in the figure, the lower cover plate 10 is installed on the bottom surface of the pump body 8 to close the inner cavity 804. The lower cover plate 10 is provided with a lead inlet for the entry of lead liquid. The filter screen 11 is installed at the lead inlet for filtering the lead liquid flowing into the pump body 8.
[0028] In this embodiment, the impeller 9 includes an impeller body 9 and blades formed on the impeller body 9. The pump body 8 is provided with a lead outlet 805 that cooperates with the impeller 9 to output the lead liquid from the pump body 8.
[0029] In this embodiment, the lead pump structure ensures that the vertical position of the impeller 9 within the inner cavity 804 is primarily determined by the dimensions of the pump body 8 itself, and is no longer affected by the dimensions of the pump shaft 6 or sleeve 5. Furthermore, due to the action of the stop sleeve 12, the pump shaft 6 only expands upward when heated, with negligible downward expansion. Furthermore, the vertical position of the pump shaft 6 is achieved by the cooperation between the stop sleeve 12, the stop washers, and the pump body 8. Damage to the deep groove ball bearing 3 will not affect the vertical position of the pump shaft 6, and thus, the vertical position of the impeller 9. These measures significantly improve the positioning accuracy of the impeller 9 within the pump body 8 and reduce the impact of various factors on the position of the impeller 9. The mounting hole communicates with the inner cavity 804, allowing the stop sleeve 12 and the two stop washers to be immersed in the high-temperature lead liquid during the pumping process. This provides lubrication for the stop sleeve 12, the two stop washers, and the pump body 8, effectively extending the service life of the stop sleeve 12, the two stop washers, and the pump body 8, which serve as the limiting components.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A lead pump device for a lead-acid battery grid continuous casting production line, characterized by: The pump body assembly comprises a pump body, a pump shaft and a transition connection member, wherein the pump body assembly comprises a pump body, the pump body is provided with a mounting hole, and the pump shaft is mounted in the mounting hole through the transition connection member in a manner that it can rotate around its own axis; The transition connection member includes a transition sleeve and a limiting sleeve, the mounting hole has a first limiting portion, the transition sleeve is mounted on the first limiting portion, and the pump shaft is passed through the transition sleeve; the limiting sleeve is mounted on the pump shaft and is located axially above the transition sleeve, and the bottom surface of the limiting sleeve abuts against the pump body to limit the pump shaft axially to the pump body; The pump body assembly further includes an impeller, the pump body is provided with an inner cavity communicating with the mounting hole, the impeller is provided in the inner cavity, and the pump shaft extends axially to the inner cavity and is connected to the impeller; The transition connection member also includes a first limiting washer and a second limiting washer, and the mounting hole also has a second limiting portion and a third limiting portion, the second limiting portion and the third limiting portion are respectively arranged at the two ends of the axial direction of the first limiting portion, the first limiting washer is arranged in the second limiting portion and is located between the transition sleeve and the limiting sleeve, and the bottom surface of the limiting sleeve is against the top surface of the first limiting washer; the second limiting washer is arranged in the third limiting portion and is located between the impeller and the limiting sleeve.
2. The lead pump device for a lead-acid battery grid continuous casting production line according to claim 1, characterized in that: The end of the pump shaft is provided with a mounting portion, and the mounting portion passes through the limiting sleeve, the first limiting washer, the transition sleeve and the second limiting washer in sequence and is connected to the impeller.
3. The lead pump device for a lead-acid battery grid continuous casting production line according to claim 1, characterized in that: The pump body assembly also includes an upper cover plate, a sleeve and a bearing mounting seat. The upper cover plate and the bearing mounting seat are respectively installed at the axial ends of the sleeve. The sleeve is outer-circuited with the pump shaft, and the upper cover plate is installed on the top surface of the pump body.
4. The lead pump device for a lead-acid battery grid continuous casting production line according to claim 1, characterized in that: The pump body assembly also includes a lower cover plate and a filter screen. The lower cover plate is installed on the bottom surface of the pump body to close the inner cavity. The lower cover plate is provided with a lead inlet for the entry of lead liquid, and the filter screen is installed at the lead inlet.
5. The lead pump device for a lead-acid battery grid continuous casting production line according to claim 1, characterized in that: The impeller includes an impeller body and blades formed on the impeller body. The pump body is provided with a lead outlet hole that cooperates with the impeller and is used to output the lead liquid from the pump body.
6. The lead pump device for a lead-acid battery grid continuous casting production line according to claim 3, characterized in that: It also includes a bearing assembly mounted on the bearing mounting seat, and the upper end of the pump shaft axially passes through the bearing assembly.
7. The lead pump device for a lead-acid battery grid continuous casting production line according to claim 1, characterized in that: The transition sleeve is made of graphite material.