A centrifugal pump

Abstract

This application discloses a centrifugal pump that solves the technical problem of low flexibility in existing centrifugal pumps. The centrifugal pump includes a bent pipe shell, a drive assembly, an impeller, and a support. The bent pipe shell includes a first straight pipe section and a second straight pipe section. The lower end of the first straight pipe section has a first inlet for liquid entry. The bent pipe shell has a first connecting part with a first connecting hole. The drive assembly is mounted on the bent pipe shell and has a rotatable drive shaft. The impeller is located inside the first straight pipe section and is higher than the first inlet; the impeller is connected to the drive shaft. The support includes a second connecting part, a threaded fastener, a first support rod, and a second support rod. Both the first and second support rods are connected to the second connecting part. The second connecting part has a second connecting hole. The threaded fastener includes a threaded part and a nut. The shank of the threaded part extends into both the first and second connecting holes, and the nut is threadedly connected to the threaded part. The centrifugal pump of this application has high flexibility.

Description

Technical Field

[0001] This application belongs to the field of drainage equipment technology, specifically relating to a centrifugal pump. Background Technology

[0002] Currently, the single-stage centrifugal water pumps used are mainly vertical and horizontal, with the pump and matching motor integrated into one unit. They are large in size and heavy in weight, suitable for fixed water supply and drainage points, installed on fixed foundations, and configured with fixed water injection methods to meet the start-up and operation requirements of the centrifugal pump. They are inconvenient to move and lack flexibility. For temporary drainage points, only small water pumps can be used, or multiple pumps can be operated simultaneously. On-site equipment layout and pipeline laying are difficult, drainage volume is limited by the equipment, and drainage efficiency is low. Furthermore, difficulties in laying power supply systems increase the difficulty of on-site use and the consumption of manpower and materials. Summary of the Invention

[0003] To address the current technical problem of low flexibility in centrifugal pumps, this application provides a centrifugal pump and a drainage system.

[0004] In a first aspect of this application, a centrifugal pump is provided, comprising:

[0005] The bent pipe shell includes a first straight pipe section and a second straight pipe section connected and communicating with each other. The lower end of the first straight pipe section is used to abut against the bottom wall of the storage container. The lower end of the first straight pipe section is provided with a first inlet for liquid to enter. The second straight pipe section is provided with an outlet for liquid to exit. The bent pipe shell is provided with a first connecting part, and the first connecting part is provided with a first connecting hole.

[0006] A drive assembly is mounted on the bent pipe shell and is provided with a rotatable drive shaft that extends into the first straight pipe section and extends axially along the first straight pipe section.

[0007] An impeller is located inside the first straight pipe section and is higher than the first inlet; the impeller is connected to the drive shaft.

[0008] The bracket includes a second connecting part, a threaded fastener, and a first and a second support rod, both of which are in contact with the ground. The first and second support rods are both connected to the second connecting part. The second connecting part is provided with a second connecting hole. The threaded fastener includes a threaded part and a nut. The shank of the threaded part extends into the first and second connecting holes, and the nut is threadedly connected to the threaded part.

[0009] In some embodiments, the first straight pipe section is perpendicular to the bottom wall of the storage container;

[0010] Alternatively, the first straight pipe section may be inclined.

[0011] In some embodiments, when the first straight pipe section is perpendicular to the bottom wall of the storage container, the first connection portion is located in the second straight pipe section.

[0012] In some embodiments, when the first straight pipe section is inclined, the lower end face of the first straight pipe section is fitted against the bottom wall of the storage container.

[0013] In some embodiments, there are multiple first inlets, which are distributed at circumferential intervals along the first straight pipe section.

[0014] In some embodiments, the first straight pipe section includes an upper section, a lower section, and a connecting pipe, wherein multiple connecting pipes are provided, and any number of connecting pipes are operably connected sequentially between the upper section and the lower end.

[0015] In some embodiments, the first straight pipe section is further provided with a second inlet for liquid entry, the second inlet being located at the end of the straight pipe section and coaxially arranged with the straight pipe section.

[0016] In some embodiments, the first straight pipe section and the second straight pipe section are made of the same material, namely steel, and the first straight pipe section is welded to the second straight pipe section.

[0017] In some embodiments, the drive assembly further includes a base and a motor connected to the base, the base being coaxially disposed with the first straight pipe section;

[0018] The base is made of steel and is welded to the bent pipe shell.

[0019] In some embodiments, the drive assembly further includes a bearing and a bearing housing located inside the first straight pipe section; the end of the drive shaft is connected to the bearing housing via the bearing;

[0020] The bearing housing is provided with a gap between itself and the inner wall of the first straight pipe section and is connected to the first straight pipe section through a stiffening plate.

[0021] A centrifugal pump according to one or more embodiments of this application includes a bent pipe shell, a drive assembly, an impeller, and a support. The bent pipe shell includes a first straight pipe section and a second straight pipe section connected and communicating with each other. The lower end of the first straight pipe section is used to abut against the bottom wall of a storage container, and a first inlet for liquid entry is provided on the periphery of the lower end of the first straight pipe section. The second straight pipe section is provided with an outlet for liquid discharge. The bent pipe shell is provided with a first connecting portion, and the first connecting portion is provided with a first connecting hole. The drive assembly is mounted on the bent pipe shell and is provided with a rotatable drive shaft, which extends into the first straight pipe section and extends axially along the first straight pipe section. The impeller is located in the first straight pipe section and is higher than the first inlet. The impeller is connected to the drive shaft. The support includes a second connecting portion, a threaded fastener, and a first support rod and a second support rod, both of which are used to contact the ground. The first support rod and the second support rod are both connected to the second connecting portion. The second connecting portion is provided with a second connecting hole. The threaded fastener includes a threaded part and a nut. The shank of the threaded part extends into the first connecting hole and the second connecting hole, and the nut is threadedly connected to the threaded part. The centrifugal pump described in this application only requires placing it on the bottom wall of a storage container, such as the location to be drained, ensuring the first inlet is connected to the water, and submerging the impeller below the water surface to achieve drainage. It is suitable for various temporary drainage locations and areas where establishing a drainage pumping station is not feasible, offering high flexibility. Compared to horizontal and vertical centrifugal pumps, the centrifugal pump described in this application is smaller, simpler in structure, lighter, easier to move, and more flexible. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of a centrifugal pump in one or more embodiments of this application is shown.

[0023] Figure 2 It shows Figure 1 A partial structural diagram of the centrifugal pump and its support.

[0024] Figure 3 It shows Figure 1 A schematic diagram of a centrifugal pump tilted and placed in a storage container.

[0025] Figure 4 It shows Figure 1 A schematic diagram of the structure in which the first straight pipe section of the centrifugal pump is attached to the bottom wall of the storage container.

[0026] Figure 5 It shows Figure 1 A schematic diagram of a centrifugal pump placed vertically in a storage container.

[0027] Explanation of reference numerals in the attached drawings: 100-Centrifugal pump, 110-Bend shell, 111-First straight pipe section, 112-Second straight pipe section, 113-First inlet, 114-Second inlet, 115-First connecting part, 120-Drive assembly, 121-Base, 122-Motor, 123-Drive shaft, 130-Impeller, 140-Bracket, 141-First support rod, 142-Second support rod, 143-Threaded part, 144-Nut, 145-Second connecting part, 146-Connecting rod, 150-Mechanical seal, 160-Bearing housing, 161-Bearing, 162-Firming plate, 170-Baffle. Detailed Implementation

[0028] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] Besides fixed water supply and drainage pumping stations, various industries have a wide range of temporary water supply and drainage needs. However, many locations require short-term use and fluctuating drainage volumes, while very few drainage pumps are suitable for the specific site requirements. The common practice is to use small drainage equipment or multiple drainage devices operating simultaneously, increasing the difficulty of on-site construction and material consumption, resulting in low water supply and drainage efficiency and failing to meet on-site needs. On the other hand, drainage equipment with larger drainage capacities is bulky, heavy, and complex in structure, making installation and disassembly inconvenient. This is especially problematic for locations requiring a large drainage capacity to be generated quickly, where a lack of flexible and mobile drainage equipment is a significant challenge. Therefore, there is a need to find a technical solution that can effectively address the technical difficulty of generating a large drainage capacity in a short period of time.

[0030] Please see Figure 1 and Figure 2According to a first aspect of this application, a centrifugal pump 100 is provided, including a bent pipe housing 110, a drive assembly 120, an impeller 130, and a support 140. The bent pipe housing 110 includes a first straight pipe section 111 and a second straight pipe section 112 connected and communicating with each other. The lower end of the first straight pipe section 111 is used to abut against the bottom wall of a storage container, and a first inlet 113 for liquid entry is provided on the periphery of the lower end of the first straight pipe section 111. The second straight pipe section 112 is provided with an outlet for liquid discharge. The bent pipe housing 110 is provided with a first connecting portion 115, and the first connecting portion 115 is provided with a first connecting hole. The drive assembly 120 is mounted on the bent pipe housing 110 and is provided with a rotatable drive shaft 123. The drive shaft 123 extends... The first straight pipe section 111 is inserted and extends axially along the first straight pipe section 111; the impeller 130 is located in the first straight pipe section 111 and is higher than the first inlet 113. The impeller 130 is connected to the drive shaft 123; the support 140 includes a second connecting part 145, a threaded fastener, and a first support rod 141 and a second support rod 142, both of which are used to contact the ground. The first support rod 141 and the second support rod 142 are both connected to the second connecting part 145; the second connecting part 145 is provided with a second connecting hole. The threaded fastener includes a threaded part 143 and a nut 144. The rod of the threaded part 143 extends into the first connecting hole and the second connecting hole. The nut 144 is threadedly connected to the threaded part 143.

[0031] The bent pipe shell 110 includes a first straight pipe section 111 and a second straight pipe section 112 connected and communicating with each other. The first straight pipe section 111 and the second straight pipe section 112 are transitioned by an arc, wherein the first straight pipe section 111 and the second straight pipe section 112 are set at an angle. In some embodiments, the first straight pipe section 111 and the second straight pipe section 112 are perpendicular to each other. The second straight pipe section 112 is provided with an outlet for liquid discharge, that is, the second straight pipe section 112 can be connected to an external discharge pipe, etc., to ensure that the liquid entering from the first inlet 113 of the first straight pipe section 111 is smoothly discharged through the outlet.

[0032] The drive shaft 123 of the drive assembly 120 rotates under the drive of a motor 122 or other drive equipment. Since the impeller 130 is mounted on the rotating shaft, the motor 122 drives the rotating shaft to rotate, and the rotating shaft drives the impeller 130 to rotate. The inlet of the impeller 130 is connected to the first inlet 113 of the first straight pipe section 111, and the outlet of the impeller 130 is connected to the outlet of the second straight pipe section 112. The motor 122 drives the impeller 130 to rotate, and liquid enters through the first inlet 113, enters through the inlet of the impeller 130, and then exits through the outlet of the impeller 130.

[0033] To improve the mobility of the centrifugal pump 100, a first connecting part 115 is provided on the bent pipe shell 110. The first connecting part 115 is connected to the second connecting part 145 of the bracket 140. The first support rod 141, the second support rod 142, and the bottom of the bent pipe shell 110 form a three-point support, which improves the mobility of the centrifugal pump 100. The first connecting part 115 and the second connecting part 145 can be rotated. When the nut 144 is loosened, the angle between the first support rod 141, the second support rod 142, the bent pipe shell 110, and the ground can be adjusted. After adjustment, the bracket 140 and the bent pipe shell 110 are connected and fixed by tightening the nut 144.

[0034] The centrifugal pump 100 of this application only needs to be placed on the bottom wall of a storage container, such as the location to be drained, so that the first inlet 113 is connected to the water to be drained, and the impeller 130 is submerged in the water surface to achieve the drainage function. It is suitable for various temporary drainage locations and places where it is not advisable to build a drainage pumping station, and has strong flexibility. Compared with horizontal centrifugal pumps 100 and vertical centrifugal pumps 100, the centrifugal pump 100 of this application is small in size, simple in structure, light in weight, easy to move, and highly flexible.

[0035] like Figure 2 As shown, in some embodiments, a connecting rod 146 is provided between the first straight rod and the second straight rod to enhance the stability between the first straight rod and the second straight rod.

[0036] like Figure 5 As shown, in some embodiments, the first straight pipe section 111 is perpendicular to the bottom wall of the storage container; as Figure 3 and Figure 4 As shown, in some embodiments, the first straight pipe section 111 is inclined. The first straight pipe section 111 is perpendicular to the bottom wall of the storage container or at a certain angle, which can meet the drainage needs of various situations and improve the placement flexibility of the centrifugal pump 100. The first straight pipe section 111, the first bracket 140, and the second bracket 140 form a three-point support. The three-point support layout forms a stable triangle, which improves the placement stability of the centrifugal pump 100.

[0037] In some embodiments, when the first straight pipe section 111 is perpendicular to the bottom wall of the storage container, the first connecting portion 115 is located on the second straight pipe section 112. The first straight pipe section 111 is perpendicular to the bottom wall, for example, the bottom wall is horizontal. The first straight pipe section 111 is in a vertical state, while the second straight pipe section 112 is in a horizontal state. The first connecting portion 115 is located on the second straight pipe section 112, and the second straight pipe section 112 is connected and fixed to the second connecting portion 145 of the bracket 140 via the first connecting portion 115, thereby supporting the centrifugal pump 100 and ensuring the stability of the centrifugal pump 100 when placed vertically.

[0038] like Figure 4As shown, in some embodiments, when the first straight pipe segment 111 is inclined, its lower end face is fitted against the bottom wall of the storage container. That is, to ensure the stability of the inclined placement of the first straight pipe segment 111, its end can be a beveled section. This means that when the first straight pipe segment 111 is inclined, the beveled section fits better against the bottom wall, thereby increasing the contact area between the first straight pipe segment 111 and the bottom wall and ensuring the stability of the inclined placement of the first straight pipe segment 111.

[0039] In some embodiments, multiple first inlets 113 are provided, and the first inlets 113 are distributed circumferentially along the first straight pipe section 111. The inlet design has multiple openings, and these inlets are evenly distributed circumferentially along the straight pipe section, allowing fluid to enter the first straight pipe section 111 from different directions with a relatively uniform flow rate. This effectively reduces the fluid impact force at the first inlet 113, avoids excessive local pressure and eddy currents caused by single-point flow, thereby reducing energy loss and improving fluid transport efficiency.

[0040] In some embodiments, the first straight pipe section 111 includes an upper section, a lower section, and connecting pipes. Multiple connecting pipes are provided, and any number of connecting pipes are operably connected sequentially between the upper and lower sections. The connecting pipes can be connected to the upper and lower sections via flanges, facilitating internal maintenance of the centrifugal pump 100. Furthermore, by providing multiple sections, an appropriate length can be selected according to the liquid level to be drained, ensuring that the centrifugal pump 100 can adapt to drainage at different liquid levels. The length of the centrifugal pump 100 can be varied according to requirements, forming a series of centrifugal pumps 100 with different pipe diameters, lengths, flow rates, and heads. The length is typically controlled to be less than 3 meters. If a longer length is required, the first straight pipe section 111 can be segmented.

[0041] In some embodiments, the first straight pipe section 111 is further provided with a second inlet 114 for liquid entry. The second inlet 114 is located at the end of the straight pipe section and is coaxially arranged with the straight pipe section. That is, at the end of the first straight pipe section 111, the second inlet 114 is coaxial with the first straight pipe section 111, allowing the liquid to smoothly enter along the axis of the straight pipe section, ensuring the stability and uniformity of fluid flow. The second inlet 114 and the first inlet 113 can achieve dual drainage capabilities, thereby improving drainage capacity.

[0042] In some embodiments, the first straight pipe section 111 and the second straight pipe section 112 are made of the same material, both steel, and the first straight pipe section 111 and the second straight pipe section 112 are welded together. The welded connection has good sealing performance, which can prevent fluid leakage and ensure the safety and reliability of the production process. Using steel pipe as the pump casing makes the casing lightweight.

[0043] like Figure 1As shown, in some embodiments, the drive assembly 120 further includes a base 121 and a motor 122 connected to the base 121, with the base 121 coaxially arranged with the first straight pipe section 111. In some embodiments, the motor 122 of the centrifugal pump 100 is positioned above the water surface, preventing the motor 122 from being submerged in water and resulting in a low failure rate. The motor 122 is mounted on the upper part of the base 121, effectively solving the problems of motor 122 failures in water and power supply line leakage, improving water supply and drainage efficiency, and enhancing the safety of the equipment used on-site.

[0044] In some embodiments, the base 121 is made of steel and is welded to the bent pipe shell 110. The welded connection has good sealing performance, which can prevent fluid leakage and ensure the safety and reliability of the production process.

[0045] In some embodiments, the centrifugal pump 100 is equipped with a simple electrical control principle, the power distribution cabinet is miniaturized, the control cabinet can be installed on site, and remote and local control can be used, or on-site control can be performed to quickly form drainage capacity.

[0046] like Figure 1 As shown, in some embodiments, the centrifugal pump 100 is further provided with a baffle 170 connected to the inner wall of the straight pipe section. The baffle 170 has a through hole through which the drive shaft 123 passes. The inner wall of the through hole is spaced apart from the outer wall of the impeller 130 inlet. This can prevent liquid flowing out of the impeller 130 outlet from flowing back to the outlet, thus improving the discharge efficiency.

[0047] like Figure 1 As shown, in some embodiments, the drive assembly 120 also includes a bearing 161 and a bearing housing 160 located inside the first straight pipe section 111; the end of the drive shaft 123 is connected to the bearing housing 160 via the bearing 161; the drive shaft 123 is connected to the pipe wall via the bearing housing 160, forming a stable and efficient connection structure.

[0048] like Figure 1 As shown, in some embodiments, the bearing housing 160 is provided with a gap between itself and the inner wall of the first straight pipe section 111, and is connected to the first straight pipe section 111 by a stiffener 162. This ensures that the liquid entering through the second inlet 114 can flow smoothly through the gap into the impeller 130.

[0049] In some embodiments, a mounting hole is provided at the smooth transition between the first straight pipe section 111 and the second straight pipe section 112. The mounting hole is coaxially arranged with the base 121 and the first straight pipe section 111 to ensure that the drive shaft 123 can pass through the mounting hole.

[0050] like Figure 1As shown, in some embodiments, the drive shaft 123 is sealed to the mounting hole by a seal, which includes a rotating ring and a stationary ring. The rotating ring is connected to the drive shaft 123, and the stationary ring is connected to the mounting hole. The end face of the rotating ring is in close contact with the end face of the stationary ring. A mechanical seal 150 is used at the output end of the drive shaft 123. The rotating ring of the mechanical seal 150 is mounted on the drive shaft 123 with an interference fit, and the stationary ring is mounted at the mounting hole. The rotating ring of the mechanical seal 150 is mounted on the drive shaft 123 with an interference fit, ensuring that the rotating ring can rotate synchronously with the drive shaft 123 during equipment operation while maintaining a tight sealing contact. The stationary ring is mounted at the mounting hole, forming a sealing surface through precise contact with the rotating ring. This structural feature of the mechanical seal 150 allows the sealing surface to maintain good contact during equipment operation, effectively preventing liquid leakage from the gap between the drive shaft 123 and the pipe housing, reducing liquid loss, lowering the risk of environmental pollution, and improving the efficiency and safety of the equipment.

[0051] This application provides a centrifugal pump 100, which has a simple structure, light weight, and is easy to install and disassemble. It is highly flexible and mobile, enabling rapid installation of drainage equipment and solving the problem of establishing drainage capacity in a short time. Maintenance is convenient, saving on-site manpower and material consumption, and improving drainage efficiency.

[0052] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0053] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0054] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0056] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A centrifugal pump, characterized in that include: The bent pipe shell includes a first straight pipe section and a second straight pipe section connected and communicating with each other. The lower end of the first straight pipe section is used to abut against the bottom wall of the storage container. The lower end of the first straight pipe section is provided with a first inlet for liquid to enter. The second straight pipe section is provided with an outlet for liquid to exit. The bent pipe shell is provided with a first connecting part, and the first connecting part is provided with a first connecting hole. A drive assembly is mounted on the bent pipe shell and is provided with a rotatable drive shaft that extends into the first straight pipe section and extends axially along the first straight pipe section. An impeller is located inside the first straight pipe section and is higher than the first inlet; the impeller is connected to the drive shaft. The bracket includes a second connecting part, a threaded fastener, and a first and a second support rod, both of which are in contact with the ground. The first and second support rods are both connected to the second connecting part. The second connecting part is provided with a second connecting hole. The threaded fastener includes a threaded part and a nut. The shank of the threaded part extends into the first and second connecting holes, and the nut is threadedly connected to the threaded part.

2. The centrifugal pump of claim 1, wherein The first straight pipe section is perpendicular to the bottom wall of the storage container; Alternatively, the first straight pipe section may be inclined.

3. The centrifugal pump of claim 2, wherein, With the first straight pipe section perpendicular to the bottom wall of the storage container, the first connection portion is located in the second straight pipe section.

4. The centrifugal pump of claim 2, wherein, When the first straight pipe section is inclined, the lower end face of the first straight pipe section is fitted against the bottom wall of the storage container.

5. A centrifugal pump according to any one of claims 1-4, characterized in that The first inlet is provided in multiple ways, and the first inlets are distributed at intervals along the circumference of the first straight pipe section.

6. A centrifugal pump according to any one of claims 1-4, characterized in that The first straight pipe section includes an upper section, a lower section, and a connecting pipe. Multiple connecting pipes are provided, and any number of connecting pipes are operably connected sequentially between the upper section and the lower section.

7. A centrifugal pump according to any one of claims 1-4, characterized in that The first straight pipe section is also provided with a second inlet for liquid entry, the second inlet being located at the end of the straight pipe section and coaxially arranged with the straight pipe section.

8. The centrifugal pump of any of claims 1-4, wherein, The first straight pipe section and the second straight pipe section are made of the same material, steel, and the first straight pipe section is welded to the second straight pipe section.

9. The centrifugal pump according to any one of claims 1-4, characterized in that The drive assembly also includes a base and a motor connected to the base, wherein the base is coaxially arranged with the first straight pipe section; The base is made of steel and is welded to the bent pipe shell.

10. A centrifugal pump according to any one of claims 1-4, characterized in that The drive assembly also includes a bearing and a bearing housing located inside the first straight pipe section; the end of the drive shaft is connected to the bearing housing via the bearing; The bearing housing is provided with a gap between itself and the inner wall of the first straight pipe section and is connected to the first straight pipe section through a stiffening plate.

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