A groove milling machine and safety device for a slurry pipe

Abstract

The application discloses a kind of miller and the safety protection device of slurry pipe in the technical field of miller operation, to solve the problem of slurry pipe in prior art after being disconnected endangering equipment and personnel.It includes: the protective net is from the goose head frame and the slurry pipe is sleeved into it for safety protection, when the slurry pipe connection point is disconnected, the tubular protective net guides the slurry pipe, the slurry pipe safely falls vertically in the protective net, and further prevents the slurry pipe from hitting the cab, equipment or personnel;The mesh structure of the protective net prevents the low pressure generated by the falling of the slurry pipe from shrinking and prevents the slurry from splashing outside the net;The plastic ring keeps the protective net in tubular structure, gravity drives multiple plastic rings to promote the extension of the vertical section protection device, and when the goose head frame approaches the milling device, multiple plastic rings promote the superposition of the vertical section protection device, the gravity of the plastic ring makes the vertical section protection device in the best protection length, and the vertical section protection device can be self-adapting according to the height of the milling device.

Description

Technical Field

[0001] This invention relates to a safety protection device for a trenching machine and a mud pipe, belonging to the technical field of trenching machine operation. Background Technology

[0002] The twin-wheel trenching machine is a type of diaphragm wall construction equipment. Its main construction principle involves a milling device that cuts the ground layer. The cut soil is then pumped to a fixed collection point on the ground via a mud pump and mud pipe assembly. Due to the large construction depth, often exceeding 100m, the mud pipes are quite long. Different mud pipe sections are rigidly connected by clamps, thus the clamp connections are affected by the mud pipe itself. A single mud pipe section is typically 15m or 20m long, connected to the required construction depth via clamps. It needs to be wound around a mud reel and guided by guide wheels on a gooseneck frame exceeding 20 meters above the ground.

[0003] Because the different sections of the mud pipe are rigidly connected by clamps, during construction, the inside of the mud pipe is subjected to both high-speed impact from excavated soil and bending or long-term tensile forces, which limits its service life. This can lead to the mud pipe breaking at the clamp point. The breakage typically occurs at the guide wheel of the gooseneck scaffold, at a height of about 20 meters, where the bending radius is small and the stress is greatest. One end of the broken mud pipe falls vertically from the guide wheel, potentially striking equipment or personnel in the construction area directly in front of the cab, while the other end strikes the main unit or the cab, which could cause equipment damage or personal injury, with very serious consequences. Summary of the Invention

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a safety protection device for the slurry pipe of a trenching machine that protects against breakage of the slurry pipe at the clamp.

[0005] To achieve the above objectives, this disclosure employs the following technical solution: In a first aspect, this disclosure provides a safety protection device for the mud pipe of a trenching machine, including a vertical section protection device. The vertical section protection device includes plastic rings and a protective net. The protective net forms a tubular structure and is used to fit the mud pipe inside. The protective net fits and connects multiple plastic rings, which are spaced a certain distance apart. When the vertical section protection device is stacked, the plastic rings are close to each other. When the vertical section protection device is extended, the plastic rings are far apart. One end of the vertical section protective device is used to connect to the goose head frame, the mud pipe can be inserted into the protective net from the goose head frame, and the milling device is located at the end of the protective net away from the goose head frame.

[0006] In some embodiments of the first aspect, the protective net is a first asbestos net, the protective net comprising a metal mesh layer and an asbestos cloth layer.

[0007] In some embodiments of the first aspect, the vertical section protective device includes a connecting frame and multiple slings, the plastic ring is supported and connected to the connecting frame via the slings, and the connecting frame is connected to the gooseneck frame via fixing bolts.

[0008] In some embodiments of the first aspect, the inner diameter of the plastic ring and the protective net is larger than the outer diameter of the clamp used to connect adjacent mud pipes.

[0009] In some embodiments of the first aspect, the overall length of the protective net is greater than that of a single section of mud pipe.

[0010] In some embodiments of the first aspect, the overall length of the protective net is greater than the length of the mud pipe from the gooseneck frame to the cab.

[0011] In some embodiments of the first aspect, the inner diameter of the plastic ring adjacent to the milling device is smaller than the outer diameter of the milling device.

[0012] In some embodiments of the first aspect, a slope protection device is also included, the slope protection device comprising a second asbestos mesh located below the slope of the mud pipe.

[0013] Secondly, this disclosure also provides a trenching machine, including a safety protection device for the slurry pipe of the trenching machine as described in any embodiment of the first aspect.

[0014] In some embodiments of the second aspect, the machine also includes a mud reel located on the machine body, through which the mud pipe is wound and unwound; the milling machine also includes a mud pipe pulley located on the gooseneck frame, through which the mud pipe obliquely passes from the mud reel into the mud pipe pulley, and through which the mud pipe passes into the protective net; at least two corners of the second asbestos net are connected to the machine body support, and at least two corners of the second asbestos net are connected to the lifting arm support.

[0015] Compared with the prior art, the beneficial effects achieved by this disclosure are as follows: The safety protection device for the slurry pipe of the milling machine disclosed herein includes a protective net that wraps around the slurry pipe from the gooseneck frame for safety protection. When the connection point of the slurry pipe is broken, the tubular protective net guides the slurry pipe, allowing it to fall safely and vertically within the net, thus preventing it from hitting equipment or personnel in the construction area directly in front of the cab. The mesh structure of the protective net prevents it from contracting due to the low air pressure generated by the falling slurry pipe and also prevents slurry from splashing out of the net. Plastic rings maintain the tubular structure of the protective net, and multiple plastic rings under gravity promote the extension of the vertical section of the protective device. When the gooseneck frame approaches the milling device, multiple plastic rings promote the overlapping of the vertical section of the protective device. The gravity of the plastic rings ensures that the vertical section of the protective device is at the optimal protection length, and the vertical section of the protective device can adapt to the height of the milling device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this disclosure 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 only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the vertical section protection device in the safety protection device for the slurry pipe of the milling machine provided in this embodiment; Figure 2 This is a schematic diagram of the structure of the milling machine when the milling device is lowered, using the safety protection device for the slurry pipe of the milling machine provided in this embodiment; Figure 3 This is a structural diagram of the milling machine lifting and milling device when the safety protection device for the slurry pipe of the milling machine provided in this embodiment is applied; Figure 4 yes Figures 2 to 3 A schematic diagram of the structure of the milling device.

[0018] In the diagram: 1—Vertical section protective device; 2—Milling device; 3—Inclined section protective device; 4—Inclined section of mud pipe; 5—Mud reel; 6—Mud pipe pulley; 7—Goose head frame; 8—Cock's cab; 9—Machine body; 10—Lifting arm; 101—Fixing bolt; 102—Connecting frame; 103—Sling; 104—Plastic ring; 105—Safety net; 201—milling wheel; 202—mud pump; 401—mud pipe. Detailed Implementation

[0019] The technical solutions of this disclosure / application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure / application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure / application or its application or use. Example 1

[0020] This embodiment provides a safety protection device for the mud pipe of a trenching machine to solve the problem of equipment damage or personal injury caused by a disconnected mud pipe in the prior art.

[0021] refer to Figure 1The safety protection device for the slurry pipe of the milling machine provided in this embodiment includes a vertical section protection device 1, which includes a plastic ring 104 and a protective net 105. The protective net 105 forms a cylindrical tubular structure and is used to fit the slurry pipe 401 inside. The protective net 105 is fitted and connected to multiple plastic rings 104, which are spaced a certain distance apart. When the vertical section protection device 1 is stacked, the plastic rings 104 are close to each other. When the vertical section protection device 1 is extended, the plastic rings 104 are far apart from each other. One end of the vertical section protection device 1 is used to connect to the goose head frame 7. The slurry pipe 401 can pass through the protective net 105 from the goose head frame 7. The milling device 2 is located at the end of the protective net 105 away from the goose head frame 7.

[0022] refer to Figure 2 After one end of the vertical section protective device 1 is connected to the goose head frame 7, the mud pipe 401 can pass through the protective net 105 and connect to the milling device 2 at the end away from the goose head frame. The length of a single mud pipe 401 is less than the working depth of the milling device 2, so it is necessary to connect the mud pipes 401 in series with clamps; Reference Figure 2 The arrow indicates that if the clamps connecting adjacent mud pipes 401 are disconnected, the protective net 105 guides the falling mud pipes 401. The mud pipes 401 fall along the inner wall of the protective net 105 to the bottom, preventing them from hitting the cab 8 and nearby people and equipment.

[0023] The inventors' experimental research revealed that, to the dissatisfaction of technicians, the mud pipe 401 itself has a certain volume. Furthermore, when filled with mud, the mud pipe 401 can fall as a single solid entity. If the mud pipe 401 falls inside the protective tube of the sealing fabric, the low air pressure generated by the rapid descent will cause the protective tube of the sealing fabric to collapse inwards, resulting in the protective tube of the sealing fabric encasing the mud pipe 401. The mud pipe 401 and the clamps may then tear the protective tube of the sealing fabric. To avoid the problems caused by the protective tube of the sealing fabric, this embodiment uses a protective net 105 to enclose the mud pipe 401. When the mud pipe 401 is filled with mud and falls, air passes through the protective net 105 to replenish the volume of the mud pipe 401 inside the protective net 105. The protective net 105 is unlikely to collapse inward due to negative pressure, and the mud pipe 401 falls unimpeded inside the protective net 105. When the mud pipe 401 and the clamp fall, they are guided by touching the inner wall of the protective net 105. During this process, the mud pipe 401 and the clamp are only in surface contact, and it is difficult for the protective net 105 to wrap around the mud pipe 401 and the clamp. For this reason, the mesh size of the protective net 105 should not be too small, and the holes in the protective net 105 should be smaller than the sharp parts of the clamp.

[0024] The protective net 105 may be relatively light. The weight of the plastic ring 104 improves the verticality of the protective net 105, and the shape of the plastic ring 104 itself constrains the protective net 105, keeping the protective net 105 in an unobstructed inner cavity, thereby reducing the number of times the mud pipe 401 collides with the protective net 105 when it falls.

[0025] In addition, multiple plastic rings 104 are connected to the protective net 105 loops at certain intervals. Due to its porous and fibrous structure, the protective net 105 possesses a certain degree of stretchability and compressibility. (Refer to...) Figure 2 Therefore, when the milling device 2 is lowered, the protective net 105, under the gravitational force of multiple plastic rings 104, extends and wraps around the mud pipe 401. (Refer to...) Figure 3 When the milling device 2 is raised, the plastic ring 104 near the milling device 2 is supported by the milling device 2. The plastic ring 104 overlaps and drives the protective net 105 to compress. Therefore, the vertical section protective device 1 can adapt to the height of the milling device 2.

[0026] Therefore, when the milling machine 9 adopts the safety protection device for the milling machine mud pipe provided in this embodiment, when the clamp connecting the adjacent mud pipe 401 is broken, the mud pipe 401 falls down along the inner cavity of the protective net 105, avoiding injury to the surrounding cab 8, people and equipment.

[0027] Alternatively, the protective net 105 may not be a single piece during manufacturing. Multiple plastic rings 104 can be connected to the same protective net 105, or each plastic ring 104 can be connected to one or two protective nets 105, and then the protective nets 105 can be connected in series. The protective net 105 is generally made of metal. Example 2

[0028] This embodiment provides a safety protection device for the mud pipe of a trenching machine, which is an improvement on Embodiment 1. For details not covered, please refer to Embodiment 1.

[0029] To improve the tear resistance and mud-repelling properties of the protective net 105, optionally, in a further but non-limiting embodiment of this application, the protective net 105 is a first asbestos net, comprising a metal mesh layer and an asbestos cloth layer; wherein, the asbestos cloth layer has fine fibers that can effectively prevent mud from overflowing when the mud pipe 401 falls, and the asbestos cloth layer not only has better air permeability but is also more wear-resistant than petroleum-based polymer cloth; the metal mesh layer serves as the load-bearing skeleton of the protective net 105, and when the clamps come into contact with the asbestos cloth layer, the asbestos cloth layer will distribute the force to the multiple holes of the metal mesh layer, reducing the possibility of the protective net 105 breaking.

[0030] As one embodiment, reference Figure 1 , Figure 2 and Figure 3The vertical section protective device 1 includes a connecting frame 102 and multiple slings 103. A plastic ring 104 is supported and connected to the connecting frame 102 via the slings 103. The connecting frame 102 is connected to the gooseneck frame 7 via fixing bolts 101. Optionally, the fixing bolts 101 of the connecting frame 102 are connected to the top of the gooseneck frame 7, and the slings 103 are tangent to the movement profile of the mud pipe 401. The mud pipe 401 passes through the protective net 105 from the slings 103. As one embodiment, the fixing bolts 101 of the connecting frame 102 are connected to the lower position of the gooseneck frame 7. The connecting frame 102 is ring-shaped or semi-ring-shaped, and the mud pipe 401 passes directly through the connecting frame 102 into the slings 103 and the protective net 105.

[0031] In some embodiments, the outer diameter of the clamp and the outer diameter of the mud pipe 401 are significantly different, so the inner diameter of the plastic ring 104 and the protective net 105 is larger than the outer diameter of the clamp used to connect adjacent mud pipes 401.

[0032] Meanwhile, the overall length of the protective net 105 is greater than that of a single section of mud pipe 401, ensuring that the clamp will be inside the protective net 105 when it breaks.

[0033] refer to Figure 2 As another requirement for the length of the protective net 105, the overall length of the protective net 105 is greater than the length of the mud pipe 401 from the goose head frame 7 to the cab 8, so as to ensure that when the milling device 2 is lowered and the protective net 105 is fully extended, the distance between the end of the protective net 105 and the ground is not greater than the safe distance L from the top of the cab 8 to the ground.

[0034] refer to Figure 2 and Figure 3 For some trenching machines, a mud reel 5 is installed on the machine body 9, through which the mud pipe 401 is wound and unwound. The trenching machine also includes a mud pipe pulley 6 installed on the gooseneck frame 7. The mud pipe 401 is inclined from the mud reel 5 into the mud pipe pulley 6, and then passes through the mud pipe pulley 6 into the protective net 105. In this embodiment, the safety protection device for the mud pipe of the trenching machine also includes an inclined section protection device, which includes a second asbestos net 3. The second asbestos net 3 is located below the inclined section 4 of the mud pipe, and at least two corners of the second asbestos net 3 are supported and connected to the machine body 9, and at least two corners of the second asbestos net 3 are supported and connected to the lifting arm. When the inclined section 4 of the mud pipe breaks, the second asbestos net 3 reduces the impact of the falling mud pipe 401, protecting the surrounding people and equipment.

[0035] refer to Figure 4The milling device 2 consists of a milling wheel 201 and a mud pump 202 at one end. The mud pump 202 is connected to a mud pipe 401. During construction, the milling wheel 201 mills the stratum, and the milled soil is discharged through the mud pump 202 and the mud pipe 401. The mud is pumped upward through the mud pipe 401, which is connected to the ground slag collection device via a mud reel 5. As the milling device 2 continues to advance, the construction depth increases, and the vertical section protection device 1 extends to its maximum length to ensure that if the mud pipe 401 breaks and falls, it can only fall into the trench along the vertical section protection device. When construction is completed, the milling device 2 is lifted, and the vertical section protection device 1 can retract and be placed on top of the milling device 2.

[0036] Under normal circumstances, the outer diameter of the milling device 2 is larger than the inner diameter of the mud pipe 401 and the plastic ring 104, so that when the milling device 2 is lifted, the milling device 2 drives the plastic ring 104 to overlap and the mud pipe 401 to contract.

[0037] The safety protection device for mud pipes provided in this embodiment takes into account many factors such as the working conditions, structural form and lifespan of mud pipes in this industry, and has invented a safety protection device that can effectively prevent equipment or personnel casualties when accidents occur.

[0038] Optionally, the sling is a steel wire rope and the plastic ring 104 is a metal ring. Example 3

[0039] This embodiment provides a trenching machine, including a safety protection device for the slurry pipe of the trenching machine according to either embodiment one or two. The trenching machine provided in this embodiment has the same technical effect as the safety protection device for the slurry pipe of the trenching machine, and will not be described in detail here.

[0040] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "located in," "equipped with," "located in," "installed," "set," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances. "Hinged connection" includes "rotational connection."

[0042] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A safety protection device for the mud pipe of a trenching machine, characterized in that, Includes vertical section protection device (1) and inclined section protection device; The vertical section protection device (1) includes a plastic ring (104) and a protective net (105). The protective net (105) forms a tubular structure and is used to fit the mud pipe (401) inside. The protective net (105) fits and connects multiple plastic rings (104), and the plastic rings (104) are spaced a certain distance apart. When the vertical section protection device (1) is stacked, the plastic rings (104) are close to each other. When the vertical section protection device (1) is extended, the plastic rings (104) are far apart from each other. One end of the vertical section protective device (1) is used to connect with the goose head frame (7), the mud pipe (401) can be inserted into the protective net (105) from the goose head frame (7), and the milling device (2) is located at the end of the protective net (105) away from the goose head frame (7); The protective net (105) is a first asbestos net, and the protective net (105) includes a metal mesh layer and an asbestos cloth layer; The inner diameter of the milling device (2) and the adjacent plastic ring (104) is smaller than the outer diameter of the milling device (2); The inclined section protection device includes a second asbestos net (3), which is located below the inclined section (4) of the mud pipe.

2. The safety protection device for the slurry pipe of the milling machine according to claim 1, characterized in that, The vertical section protection device (1) includes a connecting frame (102) and multiple slings (103). The plastic ring (104) is supported and connected to the connecting frame (102) through the slings (103). The connecting frame (102) is connected to the goose head frame (7) through fixing bolts (101).

3. The safety protection device for the slurry pipe of the milling machine according to claim 1, characterized in that, The inner diameter of the plastic ring (104) and the protective net (105) is larger than the outer diameter of the clamp used to connect the adjacent mud pipes (401).

4. The safety protection device for the slurry pipe of the trenching machine according to claim 1, characterized in that, The overall length of the protective net (105) is greater than that of a single section of mud pipe (401).

5. The safety protection device for the slurry pipe of the trenching machine according to claim 1, characterized in that, The overall length of the protective net (105) is greater than the length of the mud pipe (401) from the goose head frame (7) to the cab (8).

6. A milling machine, characterized in that, The safety protection device for the slurry pipe of the trenching machine as described in any one of claims 1 to 5.

7. The milling machine according to claim 6, characterized in that, It also includes a mud reel (5) located on the machine body (9), through which the mud pipe (401) is wound and unwound; the milling machine also includes a mud pipe pulley (6) located on the goose head frame (7), through which the mud pipe (401) is obliquely inserted from the mud reel (5) into the mud pipe pulley (6), and through which the mud pipe (401) passes into the protective net (105); the second asbestos net (3) is supported and connected to the machine body (9) at least two corners, and is supported and connected to the lifting arm at least two corners.

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