Electromagnetic wall brush

Abstract

This invention discloses an electromagnetic brushing device suitable for steel joints in diaphragm walls, comprising: an electromagnet and a web brush assembly. The web brush assembly is connected to the magnetic force generating surface of the electromagnet and faces the web of the diaphragm wall steel during operation. The energized electromagnet generates a magnetic force that attracts the steel joint of the diaphragm wall, causing the web brush assembly to adhere tightly to the joint steel through electromagnetic force. According to an embodiment of the invention, the electromagnet adheres tightly to the joint steel through the magnetic force generated by its own energization, rather than using an inclined steel cable to suspend itself to generate a horizontal component force. This ensures that the pressure between the brushing device and the joint steel is not affected by the depth of the brushing device or the inclination angle of the steel cable suspending the brushing device, and the web brush assembly can maintain a certain brushing pressure at any depth.

Description

Technical Field

[0001] This invention relates to the field of wall brushers, and more specifically to an electromagnetic wall brusher for underground continuous walls. Background Technology

[0002] As an important form of retaining structure for deep and large foundation pits, diaphragm walls face several major challenges in joint quality control during construction, especially when steel joints are used: mud inclusion in joints, concrete flow around the surface, and verticality deviation of trench sections.

[0003] Among them, the problem of mud inclusion in the joints is the most common problem. During the construction process, mud and other impurities are easily trapped in the joints between the trench sections. After these impurities solidify, they will form weak links in the joints, affecting the waterproofness and stability of the overall structure.

[0004] The most common method for dealing with mud inclusions in the joints of diaphragm walls is wall brushing. Wall brushing involves using the grab bucket of a trenching machine or a crane to drive a wall brush to move up and down, scraping the joints to remove the mud inclusions. Wall brushes include wire brushes, steel plate brushes, gravity scrapers (I-beams with ramps), grab scrapers, etc.

[0005] Common gravity wall brushers are suspended by a grooving machine or a crane, with the center of the suspension point offset from the center of gravity of the gravity wall brusher. This allows the suspended gravity wall brusher to exert pressure on the ground-to-wall steel joint by the horizontal component of its own weight.

[0006] Because the steel wire rope suspending the gravity-type wall scrubber cannot contact the top of the wall, the vertical and horizontal distances between the center of the suspension point and the steel joint of the gravity-type wall scrubber are fixed. As the scrubbing depth increases, the inclination angle of the steel wire rope suspending the wall scrubber continuously decreases, resulting in a decrease in the horizontal component of the force generated by the wall scrubber under its own weight. This leads to a decrease in the pressure between the wall scrubber and the steel joint of the wall, which has an adverse effect on the scrubbing effect. Summary of the Invention

[0007] The purpose of this invention is to provide an electromagnetic wall brush for underground continuous walls, so as to solve the problem that the pressure between the wall brush and the wall is small and the wall brushing effect is poor when the wall brush is cleaning the wall at a deeper position.

[0008] To solve the above-mentioned technical problems, the present invention specifically provides an electromagnetic wall brushing device suitable for steel joints of underground continuous walls, comprising: an electromagnet and a web brush assembly. The web brush assembly is connected to the magnetic force generating surface of the electromagnet and faces the web of the underground continuous wall steel during operation. The energized electromagnet generates a magnetic force that attracts the steel joint of the underground wall, causing the web brush assembly to adhere tightly to the joint steel through electromagnetic force.

[0009] According to an embodiment of the present invention, the electromagnet adheres tightly to the ground wall joint steel through the magnetic force generated after it is energized, instead of using an inclined steel cable to suspend itself to generate a horizontal component force. This ensures that the pressure between the brush and the ground wall joint steel is not affected by the depth of the brush or the inclination angle of the steel cable suspending the brush. The web brush assembly can maintain a certain brushing pressure at any depth. Attached Figure Description

[0010] To more clearly illustrate the embodiments of the present invention or the technical solutions in 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 merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0011] Figure 1 This is a perspective view of the electromagnetic wall brush device according to Embodiment 1 of the present invention;

[0012] Figure 2 This is a perspective view of the abdominal brush assembly according to Embodiment 1 of the present invention;

[0013] Figure 3 This is a perspective view of the flange brush assembly according to Embodiment 1 of the present invention;

[0014] Figure 4 This is a perspective view of the web brush assembly, flange brush assembly, and transmission mechanism according to Embodiment 1 of the present invention.

[0015] Figure 5 This is a perspective view of the transmission mechanism according to Embodiment 1 of the present invention;

[0016] Figure 6 This is a plan view of the steel joint at the bottom of the scraping groove of the electromagnetic wall brusher according to Embodiment 1 of the present invention.

[0017] Figure 7 This is a plan view of the electromagnetic wall brusher scraping the wall of the groove according to Embodiment 1 of the present invention;

[0018] Figure 8 This is a perspective view of the electromagnetic wall brush device according to Embodiment 2 of the present invention;

[0019] The labels in the diagram represent the following:

[0020] 1-Trough wall; 11-Steel section; 12-Web plate; 13-Flange plate; 2-Electromagnet; 21-Lifting lug; 3-Web plate brush assembly; 31-First brush head; 32-First guide assembly; 33-First guide plate; 34-First reset assembly; 35-First tension spring; 36-First corner bracket; 4-Flange plate brush assembly; 41-Second brush head; 42-Second guide assembly; 43-Second guide plate; 44-Second reset assembly; 45-Second tension spring; 46-Second corner bracket; 5-Transmission mechanism; 51-First hydraulic cylinder; 52-Second hydraulic cylinder; 53-Oil pipe; 6-Steel wire; 7-Scraper. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The following provides an electromagnetic wall brush, see reference. Figure 1-8 .

[0023] Example 1

[0024] Figure 7 This is a plan view of an electromagnetic wall brush scraping device scraping the wall of a groove, combined with... Figure 7 The electromagnetic wall brush includes an electromagnet 2 and a web brush assembly 3. The web brush assembly 3 is elastically connected to the magnetic force generating surface of the electromagnet 2 and faces the web 12 of the underground continuous wall steel. The energized electromagnet 2 generates a magnetic force that attracts the trench wall, causing the web brush assembly 3 to contact the trench wall.

[0025] Figure 1 This is a 3D diagram of an electromagnetic wall brush. Figure 2 This is a 3D view of the abdominal brush assembly 3, combined with... Figure 1 , Figure 2 The abdominal brush assembly 3 includes: a first brush head 31, a first guide assembly 32, and a first reset assembly 34; the first guide assembly 32 slidably connects the first brush head 31 and the electromagnet 2, so that the first brush head 31 can horizontally approach or move away from the electromagnet 2; the first reset assembly 34 connects the first brush head 31 and the electromagnet 2, so that the first brush head 31 moves to its initial position away from the electromagnet 2 through the first reset assembly 34 without external force.

[0026] The first brush head 31 is a wire brush. The first brush head 31 includes two parallel clamping plates and a wire 6 clamped in the middle by the clamping plates. The two clamping plates are connected to each other by bolts.

[0027] The first guide assembly 32 includes a fixedly connected electromagnet 2 and two first guide plates 33 clamped on both sides of the first brush head 31. The first guide plates 33 provide a vertical reaction force to the first brush head 31.

[0028] The first reset assembly 34 includes a fixedly connected electromagnet 2 and first angle brackets 36 at both ends of the first brush head 31 connected by a spring 35. The spring 35 is used to pull the first brush head 31 away from the electromagnet 2 when the electromagnet 2 is de-energized.

[0029] In addition to the issue mentioned above where the pressure between the brush and the tank wall decreases as the brush falls deeper along the tank wall, there is another problem with the existing technology: Figure 6 It is known that gravity wall brushes can only remove mud from the web of the steel joint, but cannot remove mud from the flange.

[0030] Figure 1 This is a 3D diagram of an electromagnetic wall brush. Figure 3 This is a 3D view of the flange brush assembly 4, combined with... Figure 1 , Figure 3 In order to solve the technical problem that the gravity brush cannot remove mud from the flange plate position, the electromagnetic brush also includes: flange plate brush assembly 4 and transmission mechanism 5, wherein the flange plate brush assembly 4 is used to remove mud from the flange plate position.

[0031] The flange brush assembly 4 is elastically connected to the side of the magnetic force generating surface of the electromagnet 2 and faces the flange plate 13 of the underground continuous wall steel. The flange brush assembly 4 is connected to the web brush assembly 3 through the transmission mechanism 5, so that the web brush assembly 3 and the flange brush assembly 4 move synchronously when they approach or move away from the electromagnet 2.

[0032] The flange brush assembly 4 includes: a second brush head 41, a second guide assembly 42, and a second reset assembly 44; the second guide assembly 42 slidably connects the second brush head 41 and the electromagnet 2, so that the second brush head 41 can horizontally approach or move away from the electromagnet 2; the second reset assembly 44 elastically connects the second brush head 41 and the electromagnet 2, so that the second brush head 41 approaches the electromagnet 2 through the second reset assembly 44 without external force.

[0033] Specifically:

[0034] The second brush head 41 includes two parallel clamps and a steel wire 6 clamped between the clamps. The two clamps are connected to each other by bolts.

[0035] The second guide assembly 42 includes a fixedly connected electromagnet 2 and two second guide plates 43 clamped on both sides of the second brush head 41. The second guide plates 43 provide a vertical reaction force to the second brush head 41.

[0036] The second reset assembly 44 includes a fixedly connected electromagnet 2 and second angle brackets 46 at both ends of the second brush head 41 connected by a tension spring 45. The tension spring 45 is used to pull the second brush head 41 closer to the electromagnet 2 when the electromagnet 2 is de-energized.

[0037] Figure 4 This is a perspective view of the web brush assembly 3, the flange brush assembly 4, and the transmission mechanism 5. Figure 5 This is a 3D view of transmission mechanism 5, combined with... Figure 4 and Figure 5 The transmission mechanism 5 includes: a first hydraulic cylinder 51, with its two ends connected to an electromagnet 2 and a first brush head 31 respectively; a second hydraulic cylinder 52, with its two ends connected to a second electromagnet and a second brush head 41 respectively; and an oil pipe 53, with its two ends connected to the oil outlet of the first hydraulic cylinder 51 and the oil inlet of the second hydraulic cylinder 52 respectively. When the first hydraulic cylinder 51 is compressed, the hydraulic oil inside the first hydraulic cylinder 51 flows through the oil outlet and the oil pipe 53 to the oil inlet of the second hydraulic cylinder 52, causing the second hydraulic cylinder 52 to extend.

[0038] The working principle of transmission mechanism 5 is as follows:

[0039] When the electromagnet 2 is energized, it attracts the steel profile on the wall joint, causing the electromagnet 2 to approach the groove wall. The first brush head 31 is pressed against the groove wall and generates a reaction force. The spring 35 and the first hydraulic cylinder 51 are compressed. The hydraulic oil inside the first hydraulic cylinder 51 flows into the second hydraulic cylinder 52, causing the second hydraulic cylinder 52 to extend. This causes the second brush head 41 to overcome the tension of the tension spring 45 and move towards the flange plate 13 and contact the flange plate 13.

[0040] Conversely, when electromagnet 2 is de-energized, it loses its magnetic force, reducing the force exerted by the first brush head 31 on the groove wall. Electromagnet 2 moves away from the groove wall under the elastic force of spring 35. At the same time, the second brush head 41 moves away from the groove wall under the tension of tension spring 45. The first hydraulic cylinder 51 is stretched, and the hydraulic oil inside the second hydraulic cylinder 52 flows into the first hydraulic cylinder 51, causing the second hydraulic cylinder 52 to shorten until the forces exerted by spring 35 and tension spring 45 through transmission mechanism 5 are balanced.

[0041] It should also be noted that:

[0042] The width of the electromagnet 2 and the web brush assembly 3 is determined according to the thickness and depth of the wall and the width of the steel section 11 at the joint. The waterproof performance must meet the requirements of the brushing depth. Two lifting lugs 21 are welded to the top of the electromagnet 2. The troughing machine or crane suspends the two lifting lugs 21 through two steel cables, thereby limiting the position of the electromagnet 2 in the horizontal direction and preventing the electromagnetic brush from twisting between the trough walls 1 and affecting the brushing effect.

[0043] Example 2

[0044] Figure 8This is a 3D diagram of an electromagnetic wall brush.

[0045] In Example 2, a scraper 7 replaces the steel wire 6 used in the first brush head 31 and the second brush head 41 in Example 1, combined with... Figure 8 The first brush head 31 and the second brush head 41 each include two parallel clamping plates and a scraper 7 clamped between the clamping plates. The two clamping plates are connected to each other by bolts.

[0046] Example 2 is used in the initial stage of brushing the wall of the steel section 11 joint when there is a lot of mud attached to the steel section 11. After the mud is removed, the brush is replaced with a wire brush to clean the mud skin. The thickness of the scraper 7 is the same as the thickness of the wire 6, which makes it easy to replace directly.

[0047] Figure 6 This is a plan view of the 11-section steel connector for the bottom of the scraping groove of the electromagnetic wall brush. Figure 7 This is a plan view of the electromagnetic wall brush scraping device scraping the wall of the groove 1, combined with... Figure 6 and Figure 7 The brushing steps of an electromagnetic wall brush are as follows:

[0048] The first step is to install scraper 7 on the electromagnetic wall brush;

[0049] The second step is to hoist the electromagnetic wall brusher to the groove opening, install the waterproof cable, and lower the electromagnetic wall brusher to the bottom of the groove in the direction of wall brushing, making sure it is close to the joint steel 11.

[0050] The third step is to turn on the power of the electromagnetic wall brush and determine whether the electromagnetic wall brush is tightly attached to the steel profile 11 based on the lifting pull force of the wall brush. The lifting pull force is measured by the tension sensor connecting the lifting lug 21 and the steel cable. If the lifting pull force is greater than the weight of the wall brush, it is considered that the first brush head 31 and the second brush head 41 of the electromagnetic wall brush are tightly attached to the steel profile 11. Then, lift the electromagnetic wall brush.

[0051] Step 4: After lifting the electromagnetic wall brush to the slot, turn off the power and lower the wall brush again.

[0052] Fifth step, repeat steps two, three, and four until scraper 7 has no obvious soil residue, remove the scraper and install the wire brush;

[0053] Step 6: After installing the wire brush, repeat steps 2, 3, and 4 until there is no obvious dirt adhering to the wire brush.

[0054] Step 7: The wall brushing is finished, and the electromagnetic wall brush is lifted off the groove.

[0055] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of the embodiments of the present invention.

Claims

1. An electromagnetic wall brushing device suitable for steel joints of underground continuous walls, characterized in that, comprising: Electromagnet, web brush assembly, The web brush assembly is connected to the magnetic force generating surface of the electromagnet and faces the web of the underground continuous wall steel during operation. The energized electromagnet generates a magnetic force that attracts the joint steel of the underground wall, causing the web brush assembly to adhere tightly to the joint steel through electromagnetic force. The belly brush assembly is retractably connected to an electromagnet, and the electromagnetic brush also includes: a flange brush assembly and a transmission mechanism; The flange brush assembly is telescopically connected to the side of the magnetic force generating surface of the electromagnet and faces the flange plate of the underground continuous wall steel during operation. The flange brush assembly is connected to the web brush assembly through a transmission mechanism. The transmission mechanism is used to extend the flange brush assembly outward when the web brush assembly retracts inward after contacting the groove wall and contacts the flange plate with a predetermined internal stress. The transmission mechanism includes: The first hydraulic cylinder has its two ends connected to the electromagnet magnetic force generating surface and the web brush assembly, respectively. The second hydraulic cylinder is connected at both ends to the side of the electromagnet and the flange brush assembly, respectively. The oil pipe is connected at both ends to the oil outlet of the first hydraulic cylinder and the oil inlet of the second hydraulic cylinder, respectively. When the first hydraulic cylinder is compressed, the hydraulic oil inside the first hydraulic cylinder flows through the oil outlet and the oil pipe to the oil inlet of the second hydraulic cylinder, causing the second hydraulic cylinder to extend. The web brush assembly and the flange brush assembly have the same structure. The web brush assembly includes: The brush head, guide assembly, and reset assembly are provided. The guide assembly is welded to the magnetic force generating surface of the electromagnet and slidably connected to the brush head, allowing the brush head to move horizontally towards or away from the electromagnet. The reset assembly is fixedly connected to the brush head and the electromagnet, allowing the brush head to move to its initial position away from the electromagnet through the reset assembly without external force. The reset assembly includes a corner bracket and an elastic element. The corner bracket is fixedly connected to the electromagnet, and the corner bracket is connected to both ends of the brush head through the elastic element. The elastic element is used to pull the brush head to reset it when the electromagnet is de-energized.

2. The electromagnetic wall brushing device suitable for steel joints of underground continuous walls according to claim 1, characterized in that, Two lifting lugs are welded to the top of the electromagnet, and each lug is connected to the crane by a steel cable.

3. An electromagnetic wall brushing device suitable for steel joints of underground continuous walls according to claim 2, characterized in that, A tension sensor is installed on the lug or steel cable. The tension sensor is used to detect the tension required to pull the electromagnet upward.

4. An electromagnetic wall brush for use with steel joints in underground continuous walls according to claim 3, characterized in that, The brush head consists of two parallel clamps and a steel wire or scraper held between the clamps.

5. An electromagnetic wall brushing device suitable for steel joints of underground continuous walls according to claim 4, characterized in that, The two clamps are connected to each other by bolts.

6. An electromagnetic wall brush for use with steel joints in underground continuous walls according to claim 5, characterized in that, The guide assembly includes a fixedly connected electromagnet and two guide plates clamped on both sides of the brush head. The guide plates provide the brush head with a vertical reaction force during brushing operations.

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