An electric wall brushing tool for a diaphragm wall segment joint

Abstract

The utility model provides a kind of electric wall brushing tool of underground continuous wall slot section rigid joint, comprising: lifting ring, for being connected with crane;Rigid force arm, upper surface is fixedly connected with lifting ring, the end of rigid force arm is welded fixed with limit casing;Motor is located inside limit casing, and the output of motor is vertically downward setting, and the top of motor is welded fixed with the lower surface of rigid force arm;The output of motor is fixedly connected with rotating shaft, and rotating shaft is coaxial with the output of motor, and motor is used to drive rotating shaft rotation;Steel brush, fixedly covered in rotating shaft outer surface, steel brush is used to clean underground continuous wall slot section rigid joint;The underground continuous wall slot section rigid joint is circular-arc slot section joint.The utility model solves the problem that cross steel plate and H-shaped steel anti-eddy current effect is poor in the process of underground continuous wall construction, and the right-angle corner of cross steel plate and H-shaped steel is difficult to clean.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm wall construction technology, specifically providing an electric wall brushing tool for rigid joints of diaphragm wall trench sections. Background Technology

[0002] Diaphragm walls, also known as underground walls, are a type of continuous reinforced concrete underground wall constructed through segmented excavation, slurry wall support, steel cage hoisting, and concrete pouring. They serve as a core support structure combining retaining capacity, waterproofing, and load-bearing functions. Diaphragm walls are typically constructed using segmented pouring. During construction, rigid joints between successive sections commonly utilize cross-shaped steel plates and H-beams (I-beams). This is because cross-shaped steel plates and H-beams cannot be the same width as the trench section, resulting in poor concrete flow prevention and leaving a large amount of laitance and other deposits on the end faces of the trench sections after concrete pouring (the faces of the cross-shaped steel plates and H-beams furthest from the first poured section).

[0003] The effectiveness of cleaning the surface deposits at the joints directly affects the water-cutting, seepage-proofing, and retaining capacity of the diaphragm wall structure. Current cleaning methods mostly involve using wire brushes, plate brushes, gravity scrapers (H-beams with bevels), and grab scrapers. The brushing machine is mounted on the grab bucket of the trenching machine, and the grab bucket moves the plate brush up and down to scrape the joints repeatedly until no deposits remain. This process is time-consuming, and cleaning is particularly difficult at the right-angle corners of cross-shaped steel plates and H-beams. Furthermore, the cleaning effectiveness decreases significantly with increasing depth of the diaphragm wall. Utility Model Content

[0004] This utility model provides an electric wall brushing tool for the rigid joint of the diaphragm wall section, which solves the problem of poor anti-flow effect of cross steel plates and H-beams during the construction of diaphragm walls, and the difficulty in cleaning the right-angle corners of cross steel plates and H-beams.

[0005] To solve the above problems, this utility model provides an electric wall brushing tool for rigid joints of underground continuous wall trench sections, comprising:

[0006] A lifting ring, used to connect to a crane to lift the electric wall-brushing tool of the rigid joint of the underground continuous wall section;

[0007] A rigid lever arm, the upper surface of which is fixedly connected to a lifting ring, and the end of which is welded and fixed to a limiting sleeve; the rigid lever arm is used to support the limiting sleeve.

[0008] The motor is located inside the limiting sleeve, and its output end is vertically downward. The top of the motor is welded and fixed to the lower surface of the rigid lever arm. A rotating shaft is fixedly connected to the output end of the motor, and the rotating shaft is coaxial with the output end of the motor. The motor is used to drive the rotating shaft to rotate.

[0009] A steel brush, which is fixedly sleeved on the outer surface of a rotating shaft, is used to clean the rigid joints of a continuous underground wall section.

[0010] The rigid joint of the underground continuous wall trench section is an arc-shaped trench section joint.

[0011] Furthermore, the left side of the arc-shaped groove joint is a channel steel structure, the right side of the arc-shaped groove joint is an arc-shaped structure, and the side of the web of the channel steel structure away from the flange is tangent to the arc-shaped structure; the channel steel structure is located on the side of the underground continuous wall groove section that is poured first, and the arc-shaped structure is located on the side that is poured later.

[0012] Furthermore, the arc-shaped structure of the arc-shaped groove joint is made of thin steel plate, which is a steel plate with a thickness of 1.5mm to 3.0mm.

[0013] Furthermore, the lifting ring has a through hole for connecting to the crane.

[0014] Furthermore, the rigid lever arm has a V-shaped structure, and both ends of the V-shaped structure are fixedly connected to the inner wall of the limiting sleeve; the lifting ring is fixed in the middle of the rigid lever arm; the lifting ring is located on the central axis of the limiting sleeve.

[0015] Furthermore, the cross-section of the limiting sleeve is an arc shape, which is used to cooperate with the arc-shaped groove joint.

[0016] Furthermore, the cross-section of the arc-shaped structure in the arc-shaped groove joint is a semicircle or a minor arc.

[0017] Furthermore, the center of the arc-shaped structure in the arc-shaped groove joint is coaxial with the center of the limiting sleeve.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. This utility model improves the shape of the rigid channel wall joint, replacing the traditional I-beam or cross steel with a channel steel structure + arc structure. Through the dual effects of fluid guidance optimization (eliminating abrupt resistance changes) and contact sealing (physical blocking), it significantly reduces the risk of flow around the joint. It is more in line with the fluid dynamics characteristics than flat baffles or fillers, and can reduce the adhesion of concrete around the channel wall.

[0020] 2. This utility model, by setting an arc-shaped limiting sleeve and cooperating with a rigid groove wall joint with an arc-shaped structure, can restrict the left and right movement of the electric wall brush tool, thereby improving cleaning efficiency.

[0021] 3. This utility model uses a circular steel brush to clean the arc-shaped structure, avoiding dead corners that cannot be cleaned, and solving the problem of difficult cleaning at the right-angle corners of cross steel plates and H-beams.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the electric wall brushing tool for the rigid joint of the underground continuous wall trench section provided by this utility model;

[0025] Figure 2 This is a schematic diagram showing the installation relationship between the electric wall brushing tool and the arc-shaped groove joint of the rigid joint of the underground continuous wall groove segment provided by this utility model.

[0026] Figure 3 This is a schematic diagram of the rigid lever arm provided by this utility model.

[0027] Figure 4 This is a structural cross-sectional view of the steel brush provided in this embodiment of the utility model.

[0028] Figure label:

[0029] 1. Lifting ring; 2. Rigid lever arm; 3. Motor; 4. Limiting sleeve; 5. Rotating shaft; 6. Steel brush; 7. Arc-shaped groove joint;

[0030] 101. Through hole;

[0031] 201. First lever arm; 202. Second lever arm;

[0032] 601. Sleeve; 602. Brush bristles;

[0033] 701. Channel steel structure; 702. Arc-shaped structure. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] The following is combined with Figures 1 to 4 The embodiments shown illustrate the technical solution of this utility model:

[0036] This utility model embodiment provides an electric wall brushing tool for a rigid joint of a continuous underground wall trench section, such as... Figures 1 to 4 As shown, it includes a lifting ring 1, a rigid lever arm 2, a motor 3, a limiting sleeve 4, a rotating shaft 5, and a steel brush 6, wherein:

[0037] The lifting ring 1 is fixed to the upper surface of the rigid lever arm 2, which is welded to the limiting sleeve 4 to provide support. The motor 3 is located inside the limiting sleeve 4, with its output end vertically downward. The top of the motor 3 is fixed to the lower surface of the rigid lever arm 2. A rotating shaft 5 is fixedly connected to the output end of the motor 3, and the rotating shaft 5 is coaxial with the output end of the motor 3. A steel brush 6 is fixedly sleeved on the outer surface of the rotating shaft 5. The rotational force of the motor 3 is transmitted to the steel brush 6 through the rotating shaft 5. When the motor 3 is energized, it rotates, driving the steel brush 6 through the rotating shaft 5 to clean the tank wall.

[0038] See in some examples Figure 1 The lifting ring 1 has a through hole 101, and bolts can be installed in the through hole 101. The lifting ring 1 is fixedly connected to the grab bucket of the crane through the bolts installed in the through hole 101, so that the entire electric wall brush tool can be moved by controlling the crane, thereby cleaning the rigid joints of the underground continuous wall trench section at different locations.

[0039] The fixed connection between the lifting ring 1 and the rigid arm 2 includes, but is not limited to, welding, riveting, and threaded connections. For example, when using a threaded connection, the lower part of the lifting ring 1 can be cylindrical with external threads, while the top of the rigid arm 2 has an internal threaded hole that matches the external threads of the lifting ring 1. By rotating the lifting ring 1, it can be screwed into the internal threaded hole of the rigid arm 2, thereby achieving a fixed connection between the lifting ring 1 and the rigid arm 2. To prevent the threaded connection between the lifting ring 1 and the rigid arm 2 from loosening during operation, a spring washer can be placed between the lifting ring 1 and the rigid arm 2.

[0040] In some examples, refer to Figure 1 and Figure 3The rigid arm 2 has a V-shaped structure. Both ends of the rigid arm 2 are fixedly connected to the inner wall of the limiting sleeve 4. The lifting ring 1 is fixed in the middle of the rigid arm 2, and the center of the lifting ring 1 is located on the central axis of the limiting sleeve 4. The rigid arm 2 serves as the load-bearing structure of the entire electric wall brushing tool and is used to ensure the structural stability of the entire electric wall brushing tool.

[0041] In some examples, the V-shaped structure includes a first lever arm 201 and a second lever arm 202. One end of the first lever arm 201 is fixedly connected to one end of the second lever arm 202, and the other ends of the first lever arm 201 and the second lever arm 202 are respectively fixedly connected to the interior of the limiting sleeve 4 to provide support for the limiting sleeve 4. The connection between the first lever arm 201 and the second lever arm 202 is set in a cylindrical shape to avoid stress concentration and to facilitate the installation and fixing of the lifting ring 1.

[0042] In some examples, the connection methods between the rigid lever arm 2 and the limiting sleeve 4 include, but are not limited to, welding, adhesive bonding, or screw connection. Welding involves welding the rigid lever arm 2 and the limiting sleeve 4 together. Adhesive bonding uses an adhesive (such as epoxy resin AB glue or polyurethane glue) to connect the rigid lever arm 2 and the limiting sleeve 4. Screw connection uses a screw to connect the rigid lever arm 2 and the limiting sleeve 4, for example, by passing the screw through the limiting sleeve 4 from the outside and then screwing it into the end where the rigid lever arm 2 and the limiting sleeve 4 are connected. The above connection methods can be selected according to the actual situation. For example, welding is chosen if a stable and reliable structure is required, but its fatigue resistance is poor. If vibration absorption is required to reduce the transmission of vibration during cleaning, adhesive bonding can be chosen, but adhesive bonding is prone to aging. If easy disassembly and assembly are required, and a certain strength is needed, screw connection can be chosen, but screw connection is prone to loosening and requires anti-loosening measures. Additionally, threaded connections are prone to rust, which makes disassembly difficult and affects connection strength, requiring rust prevention treatment.

[0043] In some examples, motor 3 can be selected as a three-phase wound-rotor asynchronous motor (slip ring motor), a brushless DC motor, or a brushed DC motor, depending on the actual operating conditions. Specific operating condition selections are as follows:

[0044] In situations where large trench sections contain hard, thick concrete residue, a three-phase wound-rotor asynchronous motor can be used. The three-phase wound-rotor asynchronous motor supports 150% of the rated overload and is suitable for long-term continuous operation in large trench sections, ensuring the reliability of cleaning rigid joints.

[0045] For applications requiring meticulous cleaning of rigid joints, a DC brushless motor can be used. With an idle speed exceeding 24,000 rpm, the centrifugal force generated by this motor effectively removes fine residue from the steel joint. Simultaneously, the electronic controller integrated into the DC brushless motor responds to load changes in real time, automatically reducing speed and increasing torque upon encountering hard residue to protect the bristles 602 of the steel brush 6. Furthermore, the brushless design of the DC brushless motor eliminates concerns about carbon brush wear, making it suitable for high-frequency cleaning tasks.

[0046] In situations requiring the cleaning of joints in small to medium-sized diaphragm wall sections, especially with a limited budget, a DC brushed motor can be used. DC brushed motors are low-cost, easy to maintain, and provide high instantaneous torque upon startup, quickly breaking up hardened mud layers on steel surfaces. However, the carbon brushes need to be replaced periodically, making them suitable for intermittent, periodic operations.

[0047] In some examples, the end of the motor 3 connected to the rigid lever arm 2 is the end of the motor 3 away from the rotating shaft 5; the fixing method between the motor 3 and the rigid lever arm 2 is either adhesive bonding or welding. If a stable and reliable method is desired, welding can be used for fixing. If the goal is to reduce the vibration caused by the motor to the rigid lever arm 2, adhesive bonding can be used for fixing. The adhesive used is epoxy resin AB glue or polyurethane glue.

[0048] In some examples, the limiting sleeve 4 is a cylindrical structure with a through-hole notch running from top to bottom, and the two sides of the notch are flat, so the cross-section of the limiting sleeve 4 is arc-shaped. In this embodiment, an arc shape is preferred. The part where the first lever arm 201 connects to the limiting sleeve 4 is located at one-third of the arc of the inner wall of the limiting sleeve 4, and the part where the second lever arm 202 connects to the limiting sleeve 4 is located at two-thirds of the arc of the inner wall of the limiting sleeve 4, so as to achieve uniform force distribution.

[0049] In some examples, refer to Figure 2 The rigid joint of the underground continuous wall groove is an arc-shaped groove joint 7, and the cross-section of the limiting sleeve 4 is an arc to cooperate with the arc-shaped groove joint 7 to limit the movement direction of the electric wall brush tool during operation.

[0050] In some examples, refer to Figure 2The left side of the arc-shaped channel joint 7 is a channel steel structure 701 (i.e., a "]" shaped structure), and the right side is an arc-shaped structure 702. The back of the channel steel structure 701 is tangent to the surface of the arc-shaped structure 702, with the tangent point located in the middle of the arc of the arc-shaped structure 702. The channel steel structure 701 is located on the side of the underground continuous wall channel that is poured first, and the arc-shaped structure 702 is located on the side that is poured later. Because the arc-shaped structure 702 does not have the 90° corner of a traditional right-angle joint, the concrete flows naturally along the arc surface without right-angle obstruction, eliminating abrupt changes in resistance and significantly reducing the probability of the formation of a flow bypass zone, thereby reducing flow bypass accumulation. Compared with the arc-shaped structure 702, the right-angle intersection of traditional I-beams or cross-beams is prone to flow bypass accumulation. In addition, compared with traditional I-beams or cross-beams, the arc-shaped structure 702 does not have dead corners for cleaning, reducing the difficulty of cleaning.

[0051] Channel steel is generally composed of mutually perpendicular flanges and a web. The web is the vertical part in the middle of the channel steel, and the flanges are plate-like structures extending horizontally in the same direction on both sides of the web. The flanges are divided into an upper edge and a lower edge, which are perpendicular to the web and parallel to each other. In this embodiment of the utility model, the side of the channel steel structure 701 with flanges is the side of the continuous wall channel segment that is cast first, and the back side of the channel steel structure 701 is the side of the web away from the flanges.

[0052] During the brushing process, the arc-shaped structure 702 needs to be inserted from top to bottom into the space between the limiting sleeve 4 and the motor 3 to limit the movement direction of the electric brushing tool. Therefore, the diameter of the limiting sleeve 4 is larger than the diameter of the arc-shaped structure 702, and the diameter of the motor 3 is smaller than the diameter of the electric brush 3.

[0053] In some examples, the arc-shaped structure 702 also serves to prevent flow around the concrete: the pressure of the concrete during pouring forces the arc-shaped structure 702 to deform and expand to both sides until both sides of the arc-shaped structure 702 are tightly attached to the trench wall, thus forming a physical isolation layer that directly blocks the seepage channel of concrete into the trench section behind the arc-shaped trench joint 7, achieving dynamic sealing. By setting the arc-shaped structure 702, the problem of flow around the concrete caused by traditional cross steel or I-beams being smaller than the width between the trench walls can be solved.

[0054] To ensure that the arc-shaped structure 702 can both expand under concrete pressure and possess sufficient strength to prevent excessive deformation from hindering the flow, in this embodiment, the arc-shaped structure 702 is made of thin steel plate with a thickness of 1.5mm to 3.0mm to meet the requirements for deformation and strength performance.

[0055] In some examples, the central angle of the arc-shaped structure 702 does not exceed 180°. When the central angle exceeds 180°, the ends of the arc-shaped structure 702 on both sides bend away from the tank wall after being unfolded by force, and cannot stick to the tank wall tightly, which easily causes flow around the tank wall again.

[0056] In some examples, see 4, the steel brush 6 includes a sleeve 601 and bristles 602. The sleeve 601 is a cylindrical structure with openings at the top and bottom. The inner wall of the sleeve 601 is fixedly connected to the rotating shaft 5, and the outer wall of the sleeve 601 is fixedly connected to the bristles 602. The bristles 602 are made of steel wire to ensure the strength of the bristles 602. Furthermore, the bristles 602 are of the same length so that the outer side of the bristles 602 forms a circle to meet the cleaning requirements of the interior of the arc-shaped structure 702.

[0057] After the electric wall brush tool of this utility model is assembled, it is inserted from top to bottom through the gap between the groove wall and the arc-shaped structure 702 of the arc-shaped groove joint 7, so that the arc-shaped structure 702 is located between the limiting sleeve 4 and the motor 3; then a crane and the lifting ring 1 are connected by bolts to control the up and down movement of the electric wall brush tool; the motor 3 drives the steel brush 6 to rotate, cleaning the inside of the arc-shaped structure 702, while the limiting sleeve 4 is used to prevent the electric wall brush tool from moving left and right, and to prevent the electric wall brush tool from leaving the range of the arc-shaped structure 702.

[0058] The electric wall-brushing tool for rigid joints of underground continuous wall sections provided by this utility model has the following advantages:

[0059] 1. Optimize the shape of the rigid trench wall joint. Through the dual effects of fluid guidance optimization (eliminating abrupt changes in resistance) and contact sealing (physical blocking), the risk of flow around the joint is significantly reduced. It is more in line with the fluid dynamics characteristics than flat baffles or fillers, and can reduce the flow of concrete around the construction surface behind the trench wall.

[0060] 2. The left and right movement of the electric brush tool is restricted by the limiting sleeve 4 to avoid wasting time due to the need to adjust the position.

[0061] 3. Compared with traditional scrapers, this electric wall brush tool can greatly save brushing time, and because there are no dead corners to clean, the cleaning effect is significant.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An electric wall-brushing tool for a rigid joint of a diaphragm wall section, characterized in that, include: Lifting ring (1), the lifting ring (1) is used to connect with a crane to lift the electric wall brushing tool of the rigid joint of the underground continuous wall section; A rigid lever arm (2) is provided, the upper surface of which is fixedly connected to the lifting ring (1), and the end of which is welded and fixed to the limiting sleeve (4); the rigid lever arm (2) is used to support the limiting sleeve (4); The motor (3) is located inside the limiting sleeve (4), and the output end of the motor (3) is set vertically downward. The top of the motor (3) is welded and fixed to the lower surface of the rigid lever arm (2). The output end of the motor (3) is fixedly connected to a rotating shaft (5), and the rotating shaft (5) is coaxial with the output end of the motor (3). The motor (3) is used to drive the rotating shaft (5) to rotate. A steel brush (6) is fixedly sleeved on the outer surface of the rotating shaft (5). The steel brush (6) is used to clean the rigid joints of the underground continuous wall trench section. The rigid joint of the underground continuous wall trench segment is an arc-shaped trench segment joint (7).

2. The electric wall-brushing tool for the rigid joint of the underground continuous wall section according to claim 1, characterized in that: The left side of the arc-shaped groove joint (7) is a channel steel structure (701), and the right side of the arc-shaped groove joint (7) is an arc-shaped structure (702). The side of the web of the channel steel structure (701) away from the flange is tangent to the arc-shaped structure (702). The channel steel structure (701) is located on the side of the underground continuous wall groove that is poured first, and the arc-shaped structure (702) is located on the side that is poured later.

3. The electric wall-brushing tool for the rigid joint of the underground continuous wall trench section according to claim 2, characterized in that: The arc-shaped structure (702) of the arc-shaped groove joint (7) is made of thin steel plate, which is a steel plate with a thickness of 1.5mm to 3.0mm.

4. The electric wall-brushing tool for the rigid joint of the underground continuous wall section according to claim 1, characterized in that: The lifting ring (1) has a through hole (101) for connecting to the crane.

5. The electric wall-brushing tool for the rigid joint of the underground continuous wall section according to claim 1, characterized in that: The rigid lever arm (2) has a V-shaped structure, and both ends of the V-shaped structure are fixedly connected to the inner wall of the limiting sleeve (4); the lifting ring (1) is fixed in the middle of the rigid lever arm (2); the lifting ring (1) is located on the central axis of the limiting sleeve (4).

6. The electric wall-brushing tool for the rigid joint of the underground continuous wall section according to claim 2, characterized in that: The cross-section of the limiting sleeve (4) is an arc, which is used to cooperate with the arc-shaped groove joint (7).

7. The electric wall-brushing tool for the rigid joint of the underground continuous wall section according to claim 6, characterized in that: The cross-section of the arc-shaped structure (702) in the arc-shaped groove joint (7) is a semicircle or a minor arc.

8. The electric wall-brushing tool for the rigid joint of the underground continuous wall trench section according to claim 7, characterized in that: The center of the arc-shaped structure (702) in the arc-shaped groove joint (7) is coaxial with the center of the limiting sleeve (4).

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