Screw machine barrel for improving wear resistance

Abstract

The utility model discloses a screw conveyor barrel for improving wear resistance, and relates to the technical field of tunnel boring machines, the screw conveyor barrel comprises a screw barrel, the screw barrel comprises a barrel body, the front end and the rear end of the side wall of the barrel body are respectively provided with a movable opening, and the movable openings are detachably connected with movable barrel body sheets; the movable cylinder sheet comprises a movable plate and lug parts arranged at the two ends of the movable plate, and a plurality of first screw holes are formed in the lug parts; a plurality of second screw holes matched with the first screw holes are formed in the positions, at the two ends of the movable opening, of the side wall of the barrel, and the first screw holes and the second screw holes are sequentially in threaded connection through screws. By adopting the scheme, through the structure of the replaceable barrel bottom, the problem that the abrasion loss of the front part and the rear part of the bottom of the barrel of the screw conveyor greatly exceeds that of other directions is solved, and the effect of prolonging the service life of the screw conveyor is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel boring machines, and particularly relates to a screw conveyor cylinder body for improving wear resistance. Background Technique

[0002] A shield machine is a tunnel boring machine using the shield method. The construction method of the shield is that the boring machine constructs (lays) the "shield" (referring to the supporting segment) of the tunnel while boring, which is different from the open construction method. The basic working principle of the shield machine is that a cylindrical steel component advances forward along the axis of the tunnel while excavating the soil. The shell of this cylindrical component is the shield, which plays a temporary supporting role for the unlined tunnel section excavated, bears the pressure of the surrounding soil layer, sometimes also bears the groundwater pressure and keeps the groundwater outside. Operations such as excavation, soil discharge, and lining are carried out under the cover of the shield.

[0003] The screw conveyor is a key component of the pressure control system of the sealed bin of an earth pressure balance shield machine (EPB). When it works, it is necessary to accurately control the soil discharge volume to make it match the shield excavation volume to achieve the purpose of accurately controlling the pressure of the sealed bin. However, since the muck is in a very complex plastic extrusion and transportation state in the shield screw conveyor, its soil discharge volume is affected by various factors and cannot be accurately controlled only by adjusting the speed of the screw conveyor. Therefore, it is very difficult to ensure the balance between the soil discharge volume and the excavation volume.

[0004] During the construction process, after the static inspection is completed, it is found that the front and rear parts of the bottom of the screw conveyor cylinder body of the shield machine have a much larger wear amount than other positions after long-distance tunneling, seriously shortening the service life of the screw conveyor. Content of the Utility Model

[0005] The purpose of the utility model is to provide a screw conveyor cylinder body for improving wear resistance to solve the deficiencies of the existing technology. By adopting this solution, through the structure of the replaceable cylinder body bottom, the problem that the wear amount of the front and rear parts of the bottom of the screw conveyor cylinder body is much larger than other positions is solved, and the effect of extending the service life of the screw conveyor is achieved.

[0006] The utility model is realized through the following technical solutions:

[0007] A screw conveyor cylinder body for improving wear resistance, comprising:

[0008] A screw cylinder, the screw cylinder includes a cylinder body, and movable openings are provided at both the front and rear ends of the side wall of the cylinder body, and movable cylinder pieces are detachably connected at the movable openings.

[0009] In view of the problem in the prior art that during the construction process, after the static inspection is completed, it is found that the front and rear parts of the bottom of the screw conveyor cylinder of the shield machine have a much larger wear amount than other directions after long-distance tunneling, seriously shortening the service life of the screw conveyor, the present utility model provides a screw conveyor cylinder for improving wear resistance. With this solution, through the structure of the replaceable cylinder bottom, the problem that the wear amount of the front and rear parts of the bottom of the screw conveyor cylinder is much larger than other directions is solved, and the effect of extending the service life of the screw conveyor is achieved. In a specific solution, movable openings are respectively arranged at the extremely easily worn positions at the front and rear ends of the side wall of the cylinder, and movable cylinder pieces with detachable connections are arranged at the movable openings. In this way, when the movable cylinder pieces are severely worn, they can be removed and new movable cylinder pieces can be replaced, without replacing the entire screw conveyor due to local damage of the cylinder, thereby extending the service life of the screw conveyor.

[0010] Further, as a detachable connection method, the movable cylinder piece includes a movable plate, and ears arranged at both ends of the movable plate, and a plurality of first screw holes are provided on the ears;

[0011] A plurality of second screw holes adapted to the first screw holes are provided on the side wall of the cylinder at both ends of the movable opening, and the first screw holes and the second screw holes are sequentially connected by screws in a threaded manner.

[0012] Further, to facilitate the fitting and installation of the movable cylinder piece, the ears are connected to the outer sides of the cylinder at both ends of the movable opening, and the thickness of the ears is less than the thickness of the movable plate.

[0013] Further, to match the shape of the screw cylinder, the movable cylinder piece is integrally arc-shaped and adapted to the side wall of the cylinder.

[0014] Further, to facilitate the removal of the movable cylinder piece, a handle is provided on the outer side wall of the movable cylinder piece.

[0015] Further, to discharge as much mud residue as possible and improve the efficiency of the screw conveyor, a slag discharge port is further provided at the rear end of the cylinder, and the slag discharge port is located between the rear end of the cylinder and a movable opening close to the rear end of the cylinder.

[0016] Further, as the other components of the screw cylinder, it further includes a rear cover for closing the rear end of the cylinder, and a spiral part located on the axis of the cylinder. The spiral part is rotatably connected to the rear cover, and the other end of the spiral part extends out of the front end of the cylinder.

[0017] Further, to drive the spiral rod to rotate, the spiral part includes a spiral rod and a motor. The motor is fixedly arranged in the middle of the rear cover, and one end of the spiral rod is connected to the output end of the motor.

[0018] Further, to reduce the damage of the outer spiral blade and improve its service life, an inner spiral blade located inside the cylinder and an outer spiral blade located outside the cylinder are coaxially arranged on the screw rod, and the inner spiral blade and the outer spiral blade are connected as a whole; wear-resistant alloy blocks are provided on the outer surface of the outer spiral blade.

[0019] Further, to control the opening and closing of the motor, a switch electrically connected to the motor itself is provided on the motor.

[0020] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0021] 1. The present utility model provides a screw machine cylinder for improving wear resistance. By unscrewing all the screws, holding the handle, removing the worn movable cylinder piece from the movable opening, replacing it with a new movable cylinder piece, aligning the movable plate with the movable opening, covering the ears on the cylinders on both sides of the movable opening, aligning the first screw holes with the second screw holes respectively, pressing the movable cylinder piece, inserting the screws into the first screw holes respectively and tightening them, the movable cylinder piece is firmly fixed on the cylinder, completing the replacement of the worn movable cylinder piece, and the whole screw machine does not need to be replaced due to local damage of the cylinder, thus extending the service life of the screw machine.

[0022] 2. The present utility model provides a screw machine cylinder for improving wear resistance. Since the outer spiral blade directly cuts the mud and slag, and the composition of the mud and slag is complex, including soft soil and hard rock, it is easy to cause damage to the outer spiral blade, making the wear degree of the outer spiral blade greater than that of the inner spiral blade, shortening the service life of the outer spiral blade, and thus reducing the service life of the whole spiral part. Therefore, a circle of wear-resistant alloy blocks is welded around the outer spiral blade to wrap the outer spiral blade inside the wear-resistant alloy blocks. When the outer spiral blade rotates, the wear-resistant alloy blocks contact and cut the mud and slag, isolating the outer spiral blade from the mud and slag, protecting the outer spiral blade from being worn by the mud and slag, and extending the service life of the outer spiral blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, form a part of this application, and do not limit the embodiments of the present utility model. In the drawings:

[0024] Figure 1 is a schematic diagram of the overall structure of the screw machine cylinder provided by the present utility model;

[0025] Figure 2 is a schematic diagram of the internal structure of the screw machine cylinder provided by the present utility model;

[0026] Figure 3 is a schematic diagram of the structure of the screw cylinder provided by the present utility model;

[0027] Figure 4 Structural schematic diagram of the spiral part provided by the present utility model;

[0028] Figure 5 Structural schematic diagram of the movable cylinder piece provided by the present utility model;

[0029] Figure 6 Structural schematic diagram of the external spiral blade of the cylinder provided by the present utility model.

[0030] Marks in the attached drawings and corresponding names of parts:

[0031] 1. Spiral cylinder; 101. Cylinder body; 102. Rear cover; 103. Movable cylinder piece; 104. Slag discharge port; 105. Second screw hole; 106. Movable opening; 1031. Movable plate; 1032. Ear part; 1033. First screw hole; 1034. Screw; 1035. Handle; 2. Spiral part; 201. Spiral rod; 202. Inner spiral blade of the cylinder; 203. Outer spiral blade of the cylinder; 204. Motor; 205. Switch; 206. Tip of the spiral rod; 2031. Wear-resistant alloy block. Specific implementation manners

[0032] In order to make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in combination with embodiments and attached drawings. The illustrative implementation manners of the present utility model and their descriptions are only used to explain the present utility model and do not limit the present utility model.

[0033] Embodiment:

[0034] Please refer to Figures 1 to 6 , this embodiment provides a spiral machine cylinder body for urban rail transit with improved wear resistance, including a spiral cylinder 1. The spiral cylinder 1 includes a cylinder body 101. A rear cover 102 is provided at the rear of the cylinder body 101 to provide a supporting force for the spiral part 2. The rear cover 102 is fixedly connected to the cylinder body 101. Movable openings 106 are respectively provided at the front and rear ends in the middle of the bottom of the cylinder body 101. The cylinder body 101 at the movable openings 106 is easily worn. A movable cylinder piece 103 is provided in the movable openings 106. The movable cylinder piece 103 is movably connected to the cylinder body 101. When the movable cylinder piece 103 is severely worn, it can be removed and replaced with a new one to extend the service life of the spiral machine. A handle 1035 is provided in the center of the outside of the movable cylinder piece 103. Holding the handle 1035 facilitates taking the movable cylinder piece 103. The handle 1035 is fixedly connected to the movable cylinder piece 103. A plurality of second screw holes 105 are provided at the bottom of the cylinder body 101. The second screw holes 105 are located on both sides of the movable openings 106. The screw 1034 is screwed in to fix the movable cylinder piece 103 on the spiral cylinder 1. The second screw holes 105 penetrate through the cylinder body 101.

[0035] The movable cylinder piece 103 includes a movable plate 1031. The shape of the movable plate 1031 is the same as that of the movable opening 106, and the size of the movable plate 1031 is smaller than that of the movable opening 106. The movable plate 1031 can be smoothly installed in the movable opening 106. At both ends of the movable plate 1031, there are ear parts 1032 for fixing the movable plate 1031, and the ear parts 1032 are fixedly connected to the movable plate 1031.

[0036] At the four corners of the ear part 1032, there are first screw holes 1033 respectively. The first screw holes 1033 penetrate through the ear part 1032. The first screw holes 1033 correspond to the second screw holes 105 one by one. Screws 1034 are arranged in the first screw holes 1033. The screws 1034 are threadedly connected to the ear part 1032. The screws 1034 enter the second screw holes 105 from the first screw holes 1033 to connect the movable cylinder piece 103 and the cylinder 101.

[0037] At the middle and rear position of the bottom of the cylinder 101, there is a slag discharge port 104. The slag discharge port 104 penetrates through the cylinder 101 and is used for discharging the mud slag in the spiral cylinder 1. The slag discharge port 104 is located behind the rear movable opening 106 to discharge as much mud slag as possible and improve the efficiency of the screw conveyor.

[0038] There is a spiral part 2 in the spiral cylinder 1 to provide thrust for the transportation of the mud slag. The spiral part 2 is fixedly connected to the spiral cylinder 1.

[0039] The spiral part 2 includes a spiral rod 201. At one end of the spiral rod 201, there is a spiral rod tip 206. The spiral rod tip 206 is fixedly connected to the spiral rod 201. The spiral rod tip 206 extends out of the cylinder 101 and extends into the mud slag to disturb it, which is beneficial for the external spiral blades 203 outside the cylinder to cut the mud slag.

[0040] On the rod body of the spiral rod 201, there are internal spiral blades 202 inside the cylinder. The internal spiral blades 202 are fixedly connected to the spiral rod 201. The internal spiral blades 202 rotate and push the mud slag in the spiral cylinder 1 backward to transport the mud slag from front to back.

[0041] Around the spiral rod tip 206, there are external spiral blades 203 outside the cylinder. The external spiral blades 203 are fixedly connected to the spiral rod tip 206. The external spiral blades 203 are fixedly connected to the internal spiral blades 202. The external spiral blades 203 and the internal spiral blades 202 are connected as a whole. The external spiral blades 203 cut the mud slag and directly transport it between the internal spiral blades 202, and then it is transported backward by the internal spiral blades 202.

[0042] There are three external spiral blades 203 on the cylinder, which share the shearing force of the rotary cutting sludge, reducing the damage to the external spiral blades 203. Wear-resistant alloy blocks 2031 are provided on the outer surfaces of the external spiral blades 203, separating the external spiral blades 203 from the sludge and protecting the external spiral blades 203 from being worn. The wear-resistant alloy blocks 2031 are welded to the external spiral blades 203.

[0043] At the other end of the screw rod 201, there is a motor 204. The motor 204 provides power for the spiral part 2. The motor 204 is fixedly connected to the screw rod 201 and the rear cover 102. The motor 204 is provided with a switch 205. The switch 205 is electrically connected to the motor 204. The switch 205 controls the working state of the motor 204 and is fixedly connected to the rear cover 102.

[0044] Specific working principle:

[0045] Press the switch 205 to start the motor 204. The motor 204 starts to rotate, driving the screw rod 201 and the screw tip 206 to rotate together. The screw rod 201 drives the inner barrel spiral blade 202 to rotate, and the screw tip 206 drives the outer barrel spiral blade 203 to rotate. The mud and slag cut by the shield machine accumulate at the screw tip 206 and the outer barrel spiral blade 203. As the outer barrel spiral blade 203 rotates, the outer barrel spiral blade 203 cuts and divides the mud and slag into several small portions, and the width of each small portion is equal to the pitch of the inner barrel spiral blade 202. Since the outer barrel spiral blade 203 directly cuts the mud and slag, and the composition of the mud and slag is complex, including soft soil and hard rock, it is easy to cause damage to the outer barrel spiral blade 203, making the wear degree of the outer barrel spiral blade 203 greater than that of the inner barrel spiral blade 202, shortening the service life of the outer barrel spiral blade 203, and thus reducing the service life of the entire screw part 2. Therefore, a circle of wear-resistant alloy blocks 2031 is welded around the outer barrel spiral blade 203 to wrap the outer barrel spiral blade 203 inside the wear-resistant alloy blocks 2031. When the outer barrel spiral blade 203 rotates, the wear-resistant alloy blocks 2031 contact and cut the mud and slag, isolating the outer barrel spiral blade 203 from the mud and slag, protecting the outer barrel spiral blade 203 from being worn by the mud and slag, and extending the service life of the outer barrel spiral blade 203; when the outer barrel spiral blade 203 and the inner barrel spiral blade 202 rotate, they provide a thrust force to the mud and slag, and the barrel body 101 provides a supporting force to the mud and slag. Under the combined action of the supporting force, friction force and thrust force, the mud and slag are transported from the outer barrel spiral blade 203 along the direction of the screw rod 201 to the rear of the barrel body 101. When passing through the slag outlet 104, under the action of its own weight, the mud and slag fall from the slag outlet 104 and enter the next conveying link; from past work experience, it is found that the wear of the barrel body 101 at the front and rear movable openings 106 of the screw barrel 1 is the most serious. Therefore, movable barrel pieces 103 are provided this time. When the movable barrel pieces 103 are severely worn, press the switch 205 to turn off the motor 204, and the screw part 2 stops rotating, and the conveying of the mud and slag also stops accordingly. Unscrew all the screws 1034, hold the handle 1035, remove the worn movable barrel piece 103 from the movable opening 106, replace it with a new movable barrel piece 103, align the movable plate 1031 with the movable opening 106, cover the ears 1032 on the barrel body 101 on both sides of the movable opening 106, align the first screw holes 1033 with the second screw holes 105 respectively, press the movable barrel piece 103, insert the screws 1034 into the first screw holes 1033 respectively and tighten them, firmly fix the movable barrel piece 103 on the barrel body 101, complete the replacement of the worn movable barrel piece 103, and will not replace the entire screw conveyor due to local damage of the barrel body 101, extending the service life of the screw conveyor.

[0046] The specific embodiments described above have further elaborated in detail the purpose, technical solution and beneficial effects of the present utility model. It should be understood that the above description is only the specific embodiments of the present utility model, and is not used to limit the protection scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A screw machine barrel for improving wear resistance, characterized in that: include: A spiral drum (1) comprises a drum body (101), wherein movable openings (106) are provided at both front and rear ends of the side wall of the drum body (101), and a movable drum body piece (103) is detachably connected to the movable opening (106).

2. The screw machine barrel for improving wear resistance according to claim 1, characterized in that: The movable cylinder sheet (103) comprises a movable plate (1031) and ears (1032) arranged at two ends of the movable plate (1031), and the ears (1032) are provided with a plurality of first screw holes (1033); The side walls of the cylinder (101) at both ends of the movable opening (106) are provided with a plurality of second screw holes (105) adapted to the first screw holes (1033), and the first screw holes (1033) and the second screw holes (105) are threadedly connected in sequence via screws (1034).

3. The screw machine barrel for improving wear resistance according to claim 2, characterized in that: The ear portion (1032) is connected to the outer side of the cylinder (101) at both ends of the movable opening (106), and the thickness of the ear portion (1032) is smaller than the thickness of the movable plate (1031).

4. The screw machine barrel for improving wear resistance according to claim 1, characterized in that: The movable cylinder sheet (103) is in an overall arc shape that matches the side wall of the cylinder (101).

5. The screw machine barrel for improving wear resistance according to claim 1, characterized in that: The outer side wall of the movable cylinder sheet (103) is provided with a handle (1035).

6. The screw machine barrel for improving wear resistance according to claim 1, characterized in that: The rear end of the cylinder (101) is also provided with a slag outlet (104), and the slag outlet (104) is located between the rear end of the cylinder (101) and a movable opening (106) close to the rear end of the cylinder (101).

7. The screw machine barrel for improving wear resistance according to claim 1, characterized in that: It also includes a rear cover (102) for closing the rear end of the cylinder (101), and a spiral portion (2) located on the axis of the cylinder (101), the spiral portion (2) and the rear cover (102) are rotatably connected, and the other end of the spiral portion (2) extends out of the front end of the cylinder (101).

8. The screw machine barrel for improving wear resistance according to claim 7, characterized in that: The spiral part (2) comprises a spiral rod (201) and a motor (204); the motor (204) is fixedly arranged in the middle of the rear cover (102); one end of the spiral rod (201) is connected to an output end of the motor (204).

9. The screw machine barrel for improving wear resistance according to claim 8, characterized in that: The spiral rod (201) is coaxially provided with an inner cylinder spiral blade (202) located inside the cylinder and an outer cylinder spiral blade (203) located outside the cylinder, wherein the inner cylinder spiral blade (202) and the outer cylinder spiral blade (203) are connected as a whole; and a wear-resistant alloy block (2031) is provided on the outer surface of the outer cylinder spiral blade (203).

10. The screw machine barrel for improving wear resistance according to claim 8, characterized in that: The motor (204) is provided with a switch (205) electrically connected to the motor (204).

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