Horizontal technical water supply pump shaft seal water retaining box

Abstract

The invention discloses a horizontal technical water supply pump shaft seal water retaining box, and belongs to the technical field of hydropower station technical water supply pump shaft seal, the horizontal technical water supply pump shaft seal water retaining box comprises a box body, the box body comprises an upper box body and a lower box body, and the lower box body and the upper box body are symmetrically arranged and jointly define a cavity; shaft holes matched with a pump shaft are formed in the two ends of the box body. The water baffle is arranged in the cavity and is arranged along the axial direction of the cavity; the drainage tank is arranged on the lower box body and is provided with a drainage port; the locking unit at least comprises a first locking mechanism used for achieving connection and locking between the upper box body and the lower box body. By optimizing the water retaining structure, the problems that shaft seal water of a water supply pump in the horizontal technology is prone to splashing everywhere and has no water retaining effect are solved, safe operation of peripheral electrical equipment is ensured, the service life of the equipment is prolonged, and meanwhile the sealing performance and corrosion resistance are improved; the maintenance process is further simplified, and the pump stopping time is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of shaft seals for water supply pumps in hydropower stations, and in particular to a shaft seal water retaining box for a horizontal water supply pump. Background Art

[0002] Horizontal technical water supply pumps are critical equipment in hydropower stations' technical water supply systems. The operating status of their shaft seals directly impacts the stability and safety of the entire system. Currently, high-speed rotation at the shaft seals of horizontal technical water supply pumps can easily cause water splashing. Existing equipment generally lacks effective water-retaining mechanisms, resulting in widespread water splashing, which can easily affect surrounding electrical equipment such as motors. This situation can not only cause electrical failures and safety hazards, but can also lead to personal injuries, seriously threatening equipment and personnel safety.

[0003] Even some equipment that incorporates water retaining devices has significant drawbacks. Existing water retaining devices are either loosely constructed or prone to leaks due to aging materials. This allows water to seep into the bearing housing, leading to lubrication failure, bearing corrosion, and other problems. This significantly shortens the equipment's service life and increases maintenance costs and downtime.

[0004] Furthermore, existing water retaining boxes often utilize a single baffle structure, resulting in low water collection efficiency and difficulty handling the large amounts of water thrown off by the high-speed rotation of the shaft seal, resulting in poor water retention. Furthermore, the installation and removal of existing water retaining boxes are extremely inconvenient. Maintenance requires shutting down the technical water supply pump and disassembling the motor and technical water supply pump. This cumbersome and complex maintenance process not only severely impacts the normal operation of the water supply system, but also significantly increases pump downtime and reduces equipment efficiency.

[0005] In response to the above problems, there is an urgent need for a water retaining structure that can efficiently intercept and guide the shaft seal to throw water and is easy to maintain. Summary of the Invention

[0006] In response to the above-mentioned problems in the prior art, the present invention provides a horizontal water supply pump shaft seal water retaining box, which aims to solve the problems of the existing horizontal water supply pump shaft seal water easily splashing everywhere and poor water retaining effect. To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A horizontal technical water supply pump shaft seal water retaining box, comprising: The box body comprises an upper box body and a lower box body, wherein the lower box body and the upper box body are symmetrically arranged and enclose together to form a cavity; shaft holes matching the pump shaft are opened at both ends of the box body; a water baffle, disposed in the cavity and arranged along the axial direction thereof; A drainage trough is provided on the lower box body and has a drainage port; The locking unit at least includes a first locking mechanism for achieving connection and locking between the upper box body and the lower box body.

[0007] Furthermore, upper mounting ear plates are provided on both sides of the upper box body, and lower mounting ear plates are provided on both sides of the lower box body; the first locking mechanism includes a first electromagnetic adsorption component, the first electromagnetic adsorption component includes a first electromagnet, a first power supply and a first switch, the first electromagnet is installed on one of the upper mounting ear plate and the lower mounting ear plate, and the first switch is used to control the connection and disconnection of the first electromagnet and the first power supply.

[0008] Furthermore, the upper mounting ear plate and the lower mounting ear plate are correspondingly provided with a first locking pin hole, and the first locking mechanism also includes a first spring pin assembly for cooperating with the first locking pin hole; the first spring pin assembly includes a baffle and a locking pin rod whose end is fixedly connected to the baffle; a spring is provided on the surface of the locking pin rod; and an upper gasket and a lower gasket for limiting the movement of the spring are respectively connected to both ends of the spring.

[0009] Furthermore, the locking unit also includes a second locking mechanism for achieving connection and locking between the box body and the pump shaft seal.

[0010] Furthermore, the left end of the upper box body is provided with an upper mounting ear plate, and the left end of the lower box body is provided with a lower mounting ear plate; the second locking mechanism includes a second electromagnetic adsorption component, the second electromagnetic adsorption component includes a second electromagnet, a second power supply and a second switch, the second electromagnet is installed on the upper mounting ear plate and the lower mounting ear plate, and the second switch is used to control the connection and disconnection of the second electromagnet and the second power supply.

[0011] Furthermore, second locking pin holes are correspondingly provided on the upper mounting ear plate and the lower mounting ear plate, and the second locking mechanism also includes a second spring pin assembly for cooperating with the second locking pin hole; the structure of the second spring pin assembly is the same as that of the first spring pin assembly.

[0012] Furthermore, an upper flange is provided at the right end of the upper box body, and a lower flange is provided at the right end of the lower box body.

[0013] Furthermore, the upper box body and the lower box body are both semi-cylindrical; the inner layers of the upper box body and the lower box body are impact-resistant layers; and a sealing gasket is provided between the upper box body and the lower box body.

[0014] Furthermore, the water baffle is spiral-shaped, and the angle between the water baffle and the pump shaft is 15 to 30 degrees.

[0015] Furthermore, the bottom of the drainage trough is funnel-shaped and is provided with inclined drainage holes.

[0016] The beneficial effects of the present invention are: The present invention provides a horizontal technical water supply pump shaft seal water retaining box. The water retaining box is installed at the location where the horizontal technical water supply pump shaft seal is prone to water splashing. By optimizing the water retaining structure, the problem that the horizontal technical water supply pump shaft seal water is prone to splashing everywhere and has no water retaining effect is solved, thereby ensuring the safe operation of surrounding electrical equipment, increasing the service life of the equipment, and improving the sealing and corrosion resistance. It further simplifies the maintenance process, reduces the pump downtime, and the modular design is also applicable to a variety of pump types. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure provided by the present invention; Figure 2 A schematic diagram of the three-dimensional structure of the upper box body provided by the present invention from a first perspective; Figure 3 A schematic diagram of the three-dimensional structure of the upper box body provided by the present invention from a second viewing angle; Figure 4 A schematic diagram of the three-dimensional structure of the lower box body provided by the present invention; Figure 5 A schematic diagram of the three-dimensional structure of the first spring pin assembly provided by the present invention; The figures are marked as follows: 1. upper box body; 101. upper mounting ear plate; 102. upper side mounting ear plate; 103. upper side flange; 104. first electromagnet; 105. second electromagnet; 2. lower box body; 201. lower mounting ear plate; 202. lower side mounting ear plate; 203. lower side flange; 3. box body; 4. water baffle; 5. drainage groove; 501. inclined drainage hole; 6. shaft hole; 7. sealing gasket; 8. pump shaft; 9. first locking pin hole; 10. second locking pin hole; 11. baffle; 12. locking pin rod; 13. spring; 14. upper gasket; 15. lower gasket. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as limiting the present invention.

[0020] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0021] In the description of the present invention, "plurality" means two or more.

[0022] In the description of the present invention, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features not being in direct contact with each other but being in contact with each other via another feature therebetween.

[0023] In the description of the present invention, “on”, “above” and “above” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0024] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," and "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0025] Example 1 See attached Figures 1 to 5 This embodiment provides a horizontal water supply pump shaft seal water retaining box, such as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, it includes a box body 3, a water baffle 4, a drainage groove 5 and a locking unit, specifically: The housing 3 has a split structure, consisting of an upper housing 1 and a lower housing 2. These two housings can be semi-cylindrical and symmetrically mounted above and below the pump shaft 8. The left side of the housing 3 fits snugly against the pump shaft seal housing, with the side panel edges extending to the pump shaft 8, forming a cylindrical cavity. The right side of the housing 3 can be connected to a flange, which can be a split flange. An upper flange 103 is provided at the right end of the upper housing 1, and a lower flange 203 is provided at the right end of the lower housing 2. The upper and lower flanges 103 and 203 are butted against the pump shaft 8, forming a cylindrical structure that intercepts splashing water. The inner layer of the housing 3 can be made of a wear-resistant material, such as a ceramic coating or a cemented carbide coating, to resist high-speed water erosion and extend its service life.

[0026] Water baffle 4 is located inside the upper and lower housings 1 and 2 and arranged along their axial direction. Preferably, water baffle 4 is spirally shaped, with an inclination of 15 to 30 degrees relative to the axial direction of the pump bearing. Water baffle 4 can be secured to the inside of housing 3 by welding to ensure it does not loosen under the impact of the water flow. Water baffle 4 converts the centrifugal force of the water into axial guidance force, directing water flow toward the drain trough 5. The spiral shape of water baffle 4 guides water flow along a specific trajectory through its geometric shape, directly into the drain trough 5, while reducing the direct impact of the water flow on the interior of housing 3.

[0027] The drainage groove 5 is provided on the lower box body 2. Preferably, the drainage groove 5 is provided just below the lower box body 2. The drainage groove 5 may adopt a widened structure. For example, the depth of the drainage groove 5 is 3 mm and the width is 5 mm.

[0028] The bottom of the drain trough 5 is funnel-shaped and features an inclined drain hole 501. A drain outlet is located at the bottom of the inclined drain hole 501, and the angle of the inclined drain hole 501 can be set to 20 degrees. Once water enters the drain trough 5 under the guidance of the water baffle 4, gravity draws the water toward the bottom of the funnel and drains out of the drain outlet through the inclined drain hole 501, effectively preventing water from accumulating within the box body 3.

[0029] The locking unit includes at least a first locking mechanism for connecting and locking the upper box body 1 and the lower box body 2. By providing the locking unit in conjunction with the split box body 3, the box body 3 can be easily disassembled, eliminating the need to shut down the technical water supply pump for replacement, effectively reducing maintenance costs.

[0030] Specifically, the structure of the first locking mechanism is as follows: Upper mounting lugs 101 are provided on both sides of the upper housing 1, and lower mounting lugs 201 are provided on both sides of the lower housing 2. The first locking mechanism includes a first electromagnetic attraction assembly, which comprises a first electromagnet 104, a first power supply, and a first switch. By mounting the first electromagnet 104 on the upper mounting lugs 101 and applying power to it, the first electromagnet 104, controlled by the first switch, attracts the lower mounting lugs 201 of the lower housing 2. It is understood that the first electromagnet 104 can also be mounted in the lower mounting lugs 201. A sealing gasket 7, such as a rubber gasket, can be provided between the upper and lower housings 1 and 2 to prevent water from leaking out of the housing 3 through the gap. The first electromagnet 104 can be a DC electromagnet, and the first power supply can be a 36V DC power supply. The assembly comprises a 36V DC power supply, a switch, and a soldering circuit. The first electromagnet 104 and the first switch may be connected by soldering. The soldering area and the first electromagnet 104 may be wrapped with a waterproof material. The first electromagnet 104 is controlled by the first switch.

[0031] The present invention uses the water retaining plate 4 and the drainage trough 5 to centrally drain the thrown water, preventing it from spreading to other areas and reducing splashing onto the motor, thereby reducing safety hazards. At the same time, the water retaining box can be independently disassembled, making installation convenient and allowing for maintenance and replacement without dismantling the entire pump body, significantly shortening the pump downtime.

[0032] Example 2 See attached Figures 1 to 5 . On the basis of Example 1, a horizontal technical water supply pump shaft seal water retaining box is further provided in this embodiment. The difference between this water retaining box and the water retaining box in Example 1 is that the first locking mechanism also includes a first spring pin assembly. The upper mounting ear plate 101 and the lower mounting ear plate 201 are correspondingly provided with a first lock pin hole 9, and the first spring pin assembly is used to cooperate with the first lock pin hole 9 to connect the upper box body 1 and the lower box body 2. The purpose of setting the first spring pin assembly is that when the first electromagnet 104 is powered off, the box body will not separate under the action of the first spring pin assembly, and the integrity of the box body connection can still be maintained. Multiple groups of first lock pin holes 9 and first spring pin assemblies can be provided.

[0033] Specifically, the structure of the first spring pin assembly is as follows: Figure 5 As shown, the first spring pin assembly includes a baffle 11 and a lock pin rod 12 fixedly connected to the baffle 11 at its end. A spring 13 is movably sleeved on the surface of the lock pin rod 12. The two ends of the spring 13 are respectively connected to an upper washer 14 and a lower washer 15 for limiting the movement of the spring 13. The purpose of providing the upper washer 14, the lower washer 15 and the baffle 11 on the lock pin rod 12 is that the upper washer 14 can prevent the spring 13 from falling off from the upper end of the lock pin rod 12, and the lower washer 15 can prevent the spring 13 from extending into the first lock pin hole 9. After the lock pin rod 12 is inserted, the spring 13 acts to pre-tighten the upper box body 1 and the lower box body 2 to prevent the box body 3 from vibrating. When the first electromagnet 104 is powered off, the box body 3 will not separate under the action of the first spring pin assembly, and the box body integrity can still be maintained.

[0034] When the upper and lower bodies 1 and 2 of the water retaining box are connected, first, a first electromagnet 104 is installed on the upper mounting lug 101. After the first electromagnet 104 is energized, it is controlled by the first switch to attract the lower mounting lug 201 of the lower body 2. Then, the locking pin rod 12 is inserted into the first locking pin hole 9. Once inserted, the locking pin rod 12 is rotated to a certain angle, such as 90 degrees, so that the baffle 11 can be clamped to the lower mounting lug 201 of the lower body 2 to prevent it from being pulled out. When unlocking is required, the locking pin rod 12 is rotated in the opposite direction so that the baffle 11 is aligned with the first locking pin hole 9 and the locking pin rod 12 is directly pulled out. The power is then disconnected by the first switch, so that the first electromagnet 104 on the upper mounting lug 101 no longer attracts the lower mounting lug 201.

[0035] The above connection method allows the box body to be removed without axially moving the pump body, and the water retaining box can be quickly installed and fixed without removing the pump shaft 8. At the same time, the above structure can realize the "insert-turn-lock" and "turn-pull-open" processes, and quickly lock and remove the water retaining box.

[0036] Example 3 See attached Figures 1 to 5 Based on the second embodiment, this embodiment further provides a horizontal technical water supply pump shaft seal water retaining box. This water retaining box differs from the water retaining box in the second embodiment in that the locking unit also includes a second locking mechanism for connecting and locking the box body to the pump shaft seal. The structure of the second locking mechanism is roughly the same as that of the first locking mechanism, both using electromagnetic adsorption and spring pin connection methods.

[0037] Specifically, the left end of the box body is connected to the pump shaft seal. An upper mounting lug plate 102 is provided at the left end of the upper box body 1, and a lower mounting lug plate 202 is provided at the left end of the lower box body 2. The second locking mechanism includes a second electromagnetic adsorption assembly, which includes a second electromagnet 105, a second power supply, and a second switch. The second electromagnet 105 is mounted on the upper mounting lug plate 102 and the lower mounting lug plate 202. The second switch is used to control the connection and disconnection of the second electromagnet 105 and the second power supply. Second lock pin holes 10 are correspondingly provided on the upper mounting lug plate 102 and the lower mounting lug plate 202. The second locking mechanism also includes a second spring pin assembly for engaging with the second lock pin holes 10. Preferably, the second electromagnet 105 is a circular electromagnet mounted on the outer periphery of the second lock pin hole 10.

[0038] The box body and the pump shaft seal are connected by mounting an annular second electromagnet 105 on the upper mounting lug 102 and the lower mounting lug 202. A locking pin rod 12 with a spring 13 is installed inside the second electromagnet 105. When the annular second electromagnet 105 is energized, it is magnetically attracted to the pump body on the side of the shaft seal. The locking pin rod 12 installed inside the annular second electromagnet 105 is then inserted into the second locking pin hole 10. Once fully inserted, the locking pin rod 12 is rotated a certain angle, such as 90 degrees, so that the baffle 11 can engage the slide groove on the pump shaft seal, thereby connecting the box body to the side of the pump shaft seal.

[0039] The working process of the present invention is as follows: like Figure 1As shown, the upper box body 1 and the lower box body 2 of the water retaining box are installed at the bearing of the horizontal technical water supply pump, the upper mounting ear plate 101 and the lower mounting ear plate 201 are connected by the first electromagnetic adsorption component and the first spring pin component, the left side of the box body 3 is connected to the horizontal technical water supply pump body shaft seal by the second electromagnetic adsorption component and the second spring pin component, and the right side of the box body 3 is connected by upper and lower half-moon flanges. The purpose is that since the box body 3 is installed on the rotating pump shaft 8, the upper and lower half-moon flanges can be easily disassembled, and also play a sealing role, ensuring that the rotating pump shaft 8 and the box body 3 have good sealing properties, preventing the water in the box body 3 from flowing out from the right side. The water thrown out of the pump shaft seal enters the interior of the box body 3 through the shaft hole 6, and through the water retaining plate 4 inside the box body 3, the water-rejecting centrifugal force is converted into radial diversion force. At this time, the water flows along the water retaining plate 4 in the box body 3 to the lower part of the box body 3, enters the drain groove 5, and then uses the effect of gravity to enter the funnel, thereby discharging the water out of the box body 3.

[0040] The water retaining box provided by the present invention can well solve the problems of horizontal technical water supply pump shaft seal water easily splashing everywhere, having no water retaining effect and easily causing safety hazards, and has good water retaining effect and long service life.

[0041] The above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that the technical solutions of the present invention may be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, and such modifications or equivalents shall be encompassed by the claims of the present invention. Any techniques, shapes, and structures not described in detail herein are well known.

Claims

1. A horizontal technical water supply pump shaft seal water retaining box, characterized in that: include: The box body (3) comprises an upper box body (1) and a lower box body (2), wherein the lower box body (2) and the upper box body (1) are symmetrically arranged and together enclose a cavity; shaft holes (6) are provided at both ends of the box body (3) to match the pump shaft (8); A water baffle (4) is provided in the cavity and arranged along the axial direction thereof; A drainage trough (5) is provided on the lower box body (2) and the drainage trough (5) has a drainage outlet; The locking unit comprises at least a first locking mechanism for achieving connection and locking between the upper box body (1) and the lower box body (2).

2. The horizontal technical water supply pump shaft seal water retaining box according to claim 1, characterized in that: Both sides of the upper box body (1) are provided with upper mounting ear plates (101), and both sides of the lower box body (2) are provided with lower mounting ear plates (201); the first locking mechanism comprises a first electromagnetic adsorption component, the first electromagnetic adsorption component comprises a first electromagnet (104), a first power supply and a first switch, the first electromagnet (104) is mounted on one of the upper mounting ear plates (101) and the lower mounting ear plates (201), and the first switch is used to control the connection and disconnection of the first electromagnet (104) and the first power supply.

3. The horizontal technical water supply pump shaft seal water retaining box according to claim 2, characterized in that: The upper mounting ear plate (101) and the lower mounting ear plate (201) are respectively provided with a first locking pin hole (9), and the first locking mechanism further comprises a first spring pin assembly for cooperating with the first locking pin hole (9); the first spring pin assembly comprises a baffle (11) and a locking pin rod (12) whose end is fixedly connected to the baffle (11); a spring (13) is provided on the surface of the locking pin rod (12); and the two ends of the spring (13) are respectively connected to an upper gasket (14) and a lower gasket (15) for limiting the movement of the spring (13).

4. The horizontal technical water supply pump shaft seal water retaining box according to claim 1, characterized in that: The locking unit further comprises a second locking mechanism for achieving connection and locking between the box body (3) and the pump shaft seal.

5. The horizontal technical water supply pump shaft seal water retaining box according to claim 4, characterized in that: The left end of the upper box body (1) is provided with an upper mounting ear plate (102), and the left end of the lower box body (2) is provided with a lower mounting ear plate (202); the second locking mechanism includes a second electromagnetic adsorption component, the second electromagnetic adsorption component includes a second electromagnet (105), a second power supply and a second switch, the second electromagnet (105) is installed on the upper mounting ear plate (102) and the lower mounting ear plate (202), and the second switch is used to control the connection and disconnection of the second electromagnet (105) and the second power supply.

6. The horizontal technical water supply pump shaft seal water retaining box according to claim 5, characterized in that: The upper mounting ear plate (102) and the lower mounting ear plate (202) are correspondingly provided with second locking pin holes (10), and the second locking mechanism further comprises a second spring pin assembly for cooperating with the second locking pin hole (10); the structure of the second spring pin assembly is the same as that of the first spring pin assembly.

7. The horizontal technical water supply pump shaft seal water retaining box according to claim 5, characterized in that: An upper flange (103) is provided at the right end of the upper box body (1), and a lower flange (203) is provided at the right end of the lower box body (2).

8. The horizontal technical water supply pump shaft seal water retaining box according to claim 1, characterized in that: The upper box body (1) and the lower box body (2) are both semi-cylindrical; the inner layers of the upper box body (1) and the lower box body (2) are impact-resistant layers; and a sealing gasket (7) is provided between the upper box body (1) and the lower box body (2).

9. The horizontal technical water supply pump shaft seal water retaining box according to claim 1, characterized in that: The water baffle (4) is spiral-shaped, and the angle between the water baffle (4) and the pump shaft (8) is 15 to 30 degrees.

10. The horizontal technical water supply pump shaft seal water retaining box according to claim 1, characterized in that: The bottom of the drainage trough (5) is funnel-shaped and is provided with inclined drainage holes (501).

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