Electromagnetic wall brushes

Abstract

An electromagnetic wall brush for use in a steel profile connection of an underground diaphragm wall, that It includes: an electromagnet, a bridge brush arrangement; The bridge brush assembly is connected to a magnetic force generating surface of the electromagnet and is aligned with the bridge of the underground diaphragm wall section during operation, and the excited electromagnet generates a magnetic force that attracts the diaphragm wall connection section, so that the bridge brush assembly is firmly attached to the connection section by the electromagnetic force.

Description

Technical area

[0001] The present utility model relates to the field of wall brushes, in particular to an electromagnetic wall brush for use in a steel profile connection of an underground diaphragm wall. Technology in the background

[0002] Controlling joint quality in diaphragm wall construction, especially when using profile joints, is an important form of containment of deep and large pits and presents several major challenges: the problem of mud inclusions in the joints, the problem of concrete bypassing, and the deviation of the verticality of the channel segments.

[0003] During the construction process, the joints between the canal sections tend to trap mud and other contaminants, which, after curing, form weak bonds in the joints and compromise the watertightness and stability of the overall structure.

[0004] The common method for solving the problem of mud inclusions in the joints of diaphragm walls is wall brushing. Wall brushing is a method for removing mud inclusions that uses the grapple or crane of the trenching machine to move the wall brush up and down, scraping the joints. Wall brushes include steel wire wall brushes, steel plate wall brushes, gravity buckets (I-beams with inclination), and grapple buckets.

[0005] Typically, gravity wall brushes are suspended from a trencher or crane, and the center of the suspension point is offset from the gravity wall brush's center of gravity, so that the suspended gravity wall brush relies on the horizontal force of its own gravity to exert pressure on the profile joints of the bottom wall.

[0006] Since the wire rope suspending the gravity wall brushes cannot touch the top of the foundation wall, the vertical and horizontal distances between the suspension point of the gravity wall brushes and the steel connections are fixed. As the depth of the wall brush increases, the inclination angle of the wire rope suspending the wall brush decreases, so the horizontal force generated by the wall brush due to its own gravity decreases, resulting in a reduction in the pressure between the wall brush and the steel connections of the foundation wall, which negatively impacts the effectiveness of the wall brush. Content of the utility model

[0007] The purpose of the present utility model is to provide an electromagnetic wall brush for use in a steel profile joint of an underground diaphragm wall to solve the problem that when the wall brush cleans the groove wall at a deeper position, the pressure between the wall brush and the groove wall is low and the effect of the wall brush is poor.

[0008] In order to solve the above technical problems, the present utility model particularly provides an electromagnetic wall brush for use in a steel profile connection of an underground diaphragm wall, comprising: an electromagnet, a web brush assembly, wherein the web brush assembly is connected to a magnetic force generating surface of the electromagnet and is aligned with the web of the underground continuous wall profile steel during operation, and the electrically excited electromagnet generates a magnetic force that attracts the ground wall connection steel, so that the web brush assembly is firmly attached to the connection steel by the electromagnetic force.

[0009] According to one embodiment of the present utility model, the electromagnet is attached to the floor joint profile by the magnetic force generated after its energization, instead of using an inclined steel cable on which it is suspended to generate a horizontally directed partial force, so that the pressure between the wall brush and the floor joint profile remains unaffected by the depth of the wall brush and the inclination angle of the cable on which the wall brush is suspended, and the web brush assembly is capable of maintaining a specific wall brush pressure at any depth. Description of the attached drawings

[0010] In order to more clearly illustrate the technical solutions in the embodiments or prior art of the present utility model, the accompanying drawings used in describing the embodiments or prior art will be briefly described below. Of course, the accompanying drawings in the following description are only examples, and other embodiments of the drawings can be obtained by expanding the provided drawings without creative work for a person of ordinary skill in the art. Fig. 1 shows a three-dimensional view of the electromagnetic wall brush of Embodiment 1 of the present utility model; Fig. 2 shows a three-dimensional view of a web brush assembly of Embodiment 1 of the present utility model; Fig. 3 shows a three-dimensional view of a flange plate brush assembly of Embodiment 1 of the present utility model; Fig. 4 shows a three-dimensional view of the bar brush assembly, the flange plate brush assembly and the transmission mechanism of Embodiment 1 of the present utility model; Fig. 5 shows a three-dimensional view of the transmission mechanism of Embodiment 1 of the present utility model; Fig. 6 is a plan view of a profile joint of the electromagnetic wall brush that wipes the bottom of the slot of the electromagnetic wall brush of Embodiment 1 of the present utility model; Fig. 7 is a plan view of the electromagnetic wall brushes that scrape and brush the wall of the slot of the electromagnetic wall brushes of Embodiment 1 of the present utility model; Fig. 8 shows a three-dimensional view of the electromagnetic wall brush of Embodiment 2 of the present utility model;

[0011] The designations in the figures are given as follows: 1 - Diaphragm wall; 11 - Steel profile; 12 - Web; 13 - Flange plate; 2 - Electromagnet; 21 - Tabs; 3 - Web brush assembly; 31 - First brush head; 32 - First guide assembly; 33 - First guide plate; 34 - First return assembly; 35 - First tension spring; 36 - First angle code; 4 - Flange plate brush assembly; 41 - Second brush head; 42 - Second guide assembly; 43 - Second guide plate; 44 - Second return assembly; 45 - Second tension spring; 46 - Second angle code; 5 - Transmission mechanism; 51 - First hydraulic cylinder; 52 - Second hydraulic cylinder; 53 - Oil line; 6 - Wire; 7 - Scraper. Detailed description

[0012] The technical solutions in the embodiments of the present utility model are described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present utility model. It is obvious that the described embodiments represent only a part of the embodiments of the present utility model and not all embodiments. Starting from the embodiments of the present utility model, all other embodiments achieved by a person with ordinary skill in the art without creative work fall within the scope of protection of the present utility model.

[0013] An electromagnetic wall brush is described below with reference to the Fig. 1-8 described. Embodiment 1

[0014] Fig. 7 is a plan view of the electromagnetic wall brush scraping and brushing a diaphragm wall, and in combination with Fig. 7, the electromagnetic wall brush comprises an electromagnet 2, a web brush assembly 3, wherein the web brush assembly 3 is elastically coupled to a magnetic force generating surface of the electromagnet 2 and directed toward the web 12 of the underground diaphragm wall section, and the electrically excited electromagnet 2 generates a magnetic force attracting the diaphragm wall so that the web brush assembly 3 comes into contact with the diaphragm wall.

[0015] Fig. 1 is a three-dimensional view of the electromagnetic wall brush, and Fig. 2 is a three-dimensional view of the bar brush assembly 3. In combination with Fig. 1 and Fig. 2, the bar brush assembly 3 comprises: a first brush head 31, a first guide assembly 32, and a first return 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 be moved horizontally close to or away from the electromagnet 2, and the first return assembly 34 connects the first brush head 31 and the electromagnet 2 so that the first brush head 31 is moved by the first return assembly 34 without external force in a direction away from the electromagnet 2 to an initial position.

[0016] The first brush head 31 works with a wire brush, wherein the first brush head 31 comprises two mutually parallel studs and a wire 6 held in the middle by the studs, wherein the two studs are screwed together.

[0017] The first guide assembly 32 consists of two first guide plates 33 which are fixedly connected to the electromagnet 2 and clamped on both sides of the first brush head 31, wherein the first guide plates 33 form a vertical counterforce for the first brush head 31.

[0018] The first reset assembly 34 comprises a first angle code 36 which is fixedly connected to the electromagnet 2 and is connected to the ends of the first brush head 31 via tension springs 35, wherein the tension springs 35 serve to pull the first brush head 31 away from the electromagnet 2 when the electromagnet 2 is de-energized.

[0019] In addition to the above-mentioned problem that the pressure between the wall brush and the channel wall decreases with increasing depth at which the wall brush descends along the channel wall, another problem of the prior art is that the gravity wall brush, as in connection with Fig. 6, is only able to remove the mud skin at the web position of the steel profile connection and is not able to remove the mud skin at the flange plate position.

[0020] Fig. 1 is a three-dimensional view of the electromagnetic wall brush, and Fig. 3 is a three-dimensional view of the flange plate brush assembly 4. Combined with Fig. 1 and Fig. 3, in order to solve the above technical problem that the gravity wall brush is unable to remove the mud skin at the flange plate position, the electromagnetic wall brush further comprises: a flange plate brush assembly 4 and a transmission mechanism 5, wherein the flange plate brush assembly 4 is used to remove the mud skin at the flange plate position.

[0021] The flange plate brush assembly 4 is elastically connected to the magnetic force generating surface side of the electromagnet 2 and directed toward the flange plate 13 of the underground diaphragm wall profile, and the flange plate brush assembly 4 is connected to the web brush assembly 3 through a transmission mechanism 5, so that the web brush assembly 3 and the flange plate brush assembly 4 move synchronously when approaching or moving away from the electromagnet 2.

[0022] The flange plate brush assembly 4 includes: a second brush head 41, a second guide assembly 42, and a second return 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 move horizontally toward or away from the electromagnet 2, and the second return assembly 44 elastically connects the second brush head 41 and the electromagnet 2 so that the second brush head 41 can move toward the electromagnet 2 without external force through the second return assembly 44. The special:

[0023] The second brush head 41 consists of two mutually parallel studs and a wire 6 held in the middle by the studs, the two studs being screwed together.

[0024] A second guide assembly 42 consists of two second guide plates 43 which are fixedly connected to the electromagnet 2 and clamped on both sides of the second brush head 41, wherein the second guide plates 43 represent a vertical counterforce for the second brush head 41.

[0025] The second reset assembly 44 includes a second angle code 46 which is fixedly connected to the electromagnet 2 and is connected to the ends of the second brush head 41 by means of tension springs 45, the tension springs 45 being used to pull the second brush head 41 to bring it close to the electromagnet 2 when the electromagnet 2 is de-energized.

[0026] Fig. 4 is a three-dimensional view of the bar brush assembly 3, the flange plate brush assembly 4 and the transmission mechanism 5, and Fig. 5 is a three-dimensional representation of the transmission mechanism 5. Combining the Fig. 4 and Fig. 5, the transmission mechanism 5 comprises: a first hydraulic cylinder 51, both ends of which are connected to an electromagnet 2 and a first brush head 31, respectively; a second hydraulic cylinder 52, both ends of which are respectively connected to a second electromagnet and a second brush head 41; an oil line 53, both ends of which are respectively connected to an oil outlet of the first hydraulic cylinder 51 and an oil inlet of the second hydraulic cylinder 52, and 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 line 53 to the oil inlet of the second hydraulic cylinder 52 to extend the second hydraulic cylinder 52.

[0027] The transmission mechanism 5 works as follows: When the electromagnet 2 is energized, it attracts the steel profile at the bottom wall connection, so that the electromagnet 2 is close to the groove wall, and the first brush head 31 is pressed against the groove wall, generating a reaction force. The tension spring 35 and the first hydraulic cylinder 51 are compressed, and the hydraulic fluid in the first hydraulic cylinder 51 flows to the second hydraulic cylinder 52, which extends the second hydraulic cylinder 52, so that the second brush head 41 overcomes the tensile force of the tension spring 45 and moves toward and touches the flange plate 13.

[0028] Conversely, when the electromagnet 2 is de-energized, the electromagnet 2 loses its magnetic force, so that the force of the first brush head 31 compressing the groove wall is reduced, and the electromagnet 2 moves away from the groove wall under the spring force of the tension spring 35. At the same time, the second brush head 41 moves away from the groove wall under the tensile force of the tension spring 45, the first hydraulic cylinder 51 is extended, and the hydraulic fluid in the second hydraulic cylinder 52 flows into the first hydraulic cylinder 51 to shorten the second hydraulic cylinder 52 until the forces of the tension spring 35 and the tension spring 45 acting on each other via the transmission mechanism 5 are balanced.

[0029] It is also important to note that: The width of the electromagnet 2 and the ridge brush assembly 3 is determined depending on the thickness and depth of the floor wall and the width of the steel profiles 11 at the joints. Two lugs 21 are welded to the top of the electromagnet 2, and the groove forming machine or crane lifts the two lugs 21 using two steel cables, thereby limiting the position of the electromagnet 2 in the horizontal direction and preventing the electromagnetic wall brush from twisting between the groove walls 1 and impairing the wall brushing effect. Embodiment 2

[0030] Fig. Figure 8 is a three-dimensional view of an electromagnetic wall brush.

[0031] In the second embodiment, instead of the steel wire 6 used in the first brush head 31 and the second brush head 41 in the first embodiment, a scraper 7 is used, and in conjunction with Fig. 8, both the first brush head 31 and the second brush head 41 comprise two mutually parallel studs and a scraper 7 which is clamped in the middle by the studs, and the two studs are connected to each other by bolts.

[0032] The second embodiment is used for brushing the wall in the initial stage of brushing the wall of the joint of the steel profile 11, when more soil adheres to the steel profile 11 for brushing the wall, and after completing the work of removing the adhered soil, it is replaced by a steel wire brush for cleaning the adhered mud skin, and the thickness of the scraper 7 is the same as that of the steel wire 6, which can be easily replaced directly.

[0033] Fig. 6 is a plan view of a steel profile 11 of the electromagnetic wall brush that scrapes the bottom of the slot, and Fig. Figure 7 is a plan view of the electromagnetic wall brush scraping the wall of the slot 1. In combination with the Fig. 6 and Fig. 7, the brushing steps of the electromagnetic wall brush are as follows: Step 1, Install the wiper 7 on the electromagnetic wall brush; Step 2, Lift the electromagnetic wall brush to the mouth of the trough, install the waterproof cable and lower the electromagnetic wall brush to the bottom of the trough according to the direction of brushing the wall and close to the steel profile 11; Step 3: When the power supply of the electromagnetic wall brush is turned on, the lifting force of the wall brush, which is measured by a tension sensor between the brackets 21 and the steel cable, is used to determine whether the electromagnetic wall brush is firmly connected to the steel profile 11. If the lifting tension force is greater than the weight of the wall brush, the first brush head 31 and the second brush head 41 of the electromagnetic wall brush are considered to be firmly connected to the steel profile 11, and the electromagnetic wall brush is lifted; Step 4, Turn off the power after the electromagnetic wall brush rises to the opening of the slot, and lower the wall brush again; Step 5, Perform the second, third and fourth steps cyclically until the scraper 7 no longer has any obvious dirt residue, remove the scraper and install the wire brush; Step 6, Install the wire brush and then cyclically perform the second, third and fourth steps until the wire 6 no longer has any obvious dirt residue; Step 7, end of wall brushing, electromagnetic wall brush lifts off from the slot.

[0034] The above embodiments are merely exemplary embodiments of the present utility model and are not intended to limit the present utility model; the scope of protection of the present utility model is limited by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present utility model within the scope of the present utility model's content and protection, and these modifications or equivalent substitutions are also to be regarded as embodiments of the present utility model, which fall within the scope of protection of the present utility model.

Claims

[1] An electromagnetic wall brush for use in a steel profile connection of an underground diaphragm wall, that it comprises: an electromagnet, a bar brush arrangement; the web brush assembly is connected to a magnetic force generating surface of the electromagnet and aligned with the web of the underground diaphragm wall section during operation, and the energized electromagnet generates a magnetic force that attracts the diaphragm wall connecting section, so that the web brush assembly is firmly attached to the connecting section by the electromagnetic force. [2] An electromagnetic wall brush for use in a steel profile connection of an underground diaphragm wall according to claim 1, characterized by , that the bar brush assembly is telescopically connected to the electromagnet, and the electromagnetic wall brush further comprises: a flange plate brush assembly and a transmission mechanism; the flange plate brush assembly is retractably connected to one side of a magnetic force generating surface of the electromagnet and operates toward a flange plate of an underground diaphragm wall section, and the flange plate brush assembly is connected to a ridge brush assembly through a transmission mechanism, and the transmission mechanism is used to cause the flange plate brush assembly to extend outward when the ridge brush assembly contracts inward after contacting a groove wall, and to contact a flange plate with a predetermined internal tension. [3] An electromagnetic wall brush for use in a steel profile connection of an underground diaphragm wall according to claim 2, characterized by that the transmission mechanism includes: a first hydraulic cylinder, the ends of which are connected to the magnet-generating side of the electromagnet or the bar brush arrangement a second hydraulic cylinder, each end of which is connected to the solenoid side and the flange plate brush assembly; an oil pipe having both ends connected to an oil outlet of the first hydraulic cylinder and an oil inlet of the second hydraulic cylinder, respectively, and when the first hydraulic cylinder is compressed, the hydraulic oil within the first hydraulic cylinder flows through the oil outlet and the oil pipe to the oil inlet of the second hydraulic cylinder to extend the second hydraulic cylinder. [4] An electromagnetic wall brush for use in a steel profile connection of an underground diaphragm wall according to claim 1, characterized by that the electromagnet has two tabs welded to the top of the electromagnet, each tab being connected to the crane via a steel cable. [5] An electromagnetic wall brush for use in a steel profile connection of an underground diaphragm wall according to claim 4, characterized by that the tabs or the steel cable are provided with a tension sensor and the tension sensor serves to detect the tension force required to pull up the electromagnet. [6] An electromagnetic wall brush for use in a steel profile connection of an underground diaphragm wall according to claim 2, characterized by that the bar brush assembly and the flange brush assembly have the same structure and the bar brush assembly includes: a brush head, a guide assembly, and a return assembly; the guide assembly is welded to the magnetic force-generating surface of the electromagnet and slidably connected to the brush head to allow the brush head to be moved horizontally close to or away from the electromagnet, and the return assembly is fixedly connected to the brush head and the electromagnet to allow the brush head to be moved in a direction away from the electromagnet to a home position in the absence of an external force from the return assembly. [7] An electromagnetic wall brush for use in a steel profile connection of an underground diaphragm wall according to claim 6, characterized by that the brush head has two parallel studs and a wire or scraper held in the middle by the studs. [8] An electromagnetic wall brush for use in a steel profile connection of an underground diaphragm wall according to claim 7, characterized by that two studs are screwed together. [9] An electromagnetic wall brush for use in a steel profile connection of an underground diaphragm wall according to claim 6, characterized by that the guide assembly comprises two guide plates which are firmly connected to the electromagnet and clamped on both sides of the brush head, wherein the guide plates impart a counterforce in the vertical direction to the brush head during the wall brushing process. [10] An electromagnetic wall brush for use in a steel profile connection of an underground diaphragm wall according to claim 6, characterized bythat the reset assembly comprises an angle code and an elastic element, the angle code is fixedly connected to the electromagnet, the angle code is connected to the ends of the brush head via the elastic element, and the elastic element is used to pull the brush head to reset it when the electromagnet is de-energized.

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