An adjustable secondary crushing device for a rock pipe jacking machine

Abstract

This invention discloses an adjustable secondary crushing device for a rock jacking machine, comprising a fragment lifting mechanism and a crushing mechanism. The crushing mechanism includes a housing, within which a connected stamping chamber and a mixing chamber are arranged. A stamping machine is installed in the stamping chamber, and an adjustable load-bearing mechanism is installed below the stamping machine. A mixing rod is installed in the mixing chamber to uniformly mix the fragments with water. The fragment lifting mechanism transports the rock fragments requiring secondary crushing to the crushing mechanism for secondary crushing and mixing before discharge. This invention adjusts the pressure of secondary crushing through the adjustable load-bearing mechanism and increases the fineness of the fragments through the grinding action of the grinding rod, preventing the fragments from becoming too large. Simultaneously, the mixing rod in the mixing chamber enables uniform mixing of the fragments and water, preventing clumping. This allows for efficient and precise secondary crushing and mixing of rock fragments before discharge, improving production efficiency and product quality.

Description

Technical Field

[0001] This invention relates to the field of rock jacking machine technology, specifically to an adjustable secondary crushing device for a rock jacking machine. Background Technology

[0002] Currently, pipe jacking technology, as a trenchless technology, has advantages such as fast construction speed, high degree of automation, saving human resources, and harmonious coexistence with the environment. Rock pipe jacking machines are mainly used to advance steel pipes or polyethylene pipes in underground tunnel projects and can be adapted to tunneling in mixed soil layers such as ordinary soil layers, boulders, and rock beds.

[0003] Existing rock jacking machines have a secondary crushing function, capable of further crushing the rock fragments stripped from the jacking machine. The crushed rock is then mixed with water for discharge, facilitating better tunneling and development. However, secondary crushing typically employs a downward pressing method. During this process, the pressing gap cannot be adjusted, potentially resulting in insufficient pressing pressure on the rock fragments, especially in harder areas. This leads to larger rock fragments after secondary crushing, hindering subsequent mixing and discharge. Furthermore, the crushed rock particles need to be mixed with water for discharge. Due to varying mixing ratios, there can be more rock particles than water, causing the particles to dry and clump together, further complicating the mixing and discharge process.

[0004] In the prior art, the Chinese utility model patent with application number CN201720712625.X, entitled "An Adjustable Secondary Crushing Structure for a Rock Pipe Jacking Machine," uses a rotating rock cutterhead to crush and break down the rock. The broken rock enters the mixing and crushing chamber through an opening in the rock cutterhead panel. A conical grid plate, driven by an adjusting hydraulic cylinder, moves back and forth to change the area of ​​the shearing and crushing sector, adapting to the current rock particle size. While driving the conical grid plate forward and backward, the adjusting hydraulic cylinder also increases the forward and backward compression force on the rock particles, improving the crushing capacity. However, it does not solve the problem of rock fragments clumping after crushing due to varying mixing ratios of rock particles and water. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides an adjustable secondary crushing device for a rock jacking machine. The pressure of secondary crushing is adjusted by an adjustable bearing mechanism, and the fineness of the crushed pieces is increased by the grinding action of the grinding rod to avoid excessively large pieces. At the same time, the mixing rod in the mixing chamber can achieve uniform mixing of crushed pieces and water to prevent clumping. This device can efficiently and accurately perform secondary crushing and mixing of rock fragments, thereby improving production efficiency and product quality.

[0006] The technical solution of the present invention is as follows:

[0007] An adjustable secondary crushing device for a rock jacking machine includes a fragment lifting mechanism and a crushing mechanism. The crushing mechanism includes a housing, within which a connecting stamping chamber and a mixing chamber are provided. A stamping machine is installed in the stamping chamber, and an adjustable load-bearing mechanism is installed below the stamping machine. A mixing rod is installed in the mixing chamber to uniformly mix the fragments with water. The fragment lifting mechanism transports the rock fragments requiring secondary crushing to the crushing mechanism for secondary crushing and mixing before discharge.

[0008] Furthermore, a fixing plate is fixedly provided at the bottom of the housing, the adjustable load-bearing mechanism is embedded in the fixing plate, the inclination of the punch of the stamping machine is greater than the inclination of the adjustable load-bearing mechanism, and a feed port is provided on the side of the housing near the stamping chamber, the feed port being located between the adjustable load-bearing mechanism and the stamping machine.

[0009] Furthermore, the adjustable load-bearing mechanism includes a load-bearing plate and an angle-adjustable force-receiving plate. The load-bearing plate is embedded in the fixed plate. A spring is fixedly connected to the bottom of the force-receiving plate. The other end of the spring is fixedly connected to the load-bearing plate. A rubber plate is engaged with the side of the force-receiving plate away from the feed inlet. A rough ring is fixedly connected to the other side of the rubber plate. The bottom of the rough ring is fixedly connected to the load-bearing plate.

[0010] Furthermore, the load-bearing plate includes two inclined plates, which are hinged to each other on the side near the rubber plate. A movable strip is fixedly installed on the other side of the two inclined plates, and the movable strip is in contact with the inner wall of the load-bearing plate. A gap adjustment rod is provided between the two inclined plates.

[0011] Furthermore, the outer circumferential wall of the gap adjusting rod is provided with several locking blocks of different sizes, and a connecting plate is fixedly provided on the opposite side of the two inclined plates. Each of the connecting plates is provided with a locking groove that cooperates with the locking blocks. One end of the gap adjusting rod passes through the fixed plate and is rotatably connected to the fixed plate.

[0012] Furthermore, a grinding rod is provided above the roughening ring, and both ends of the grinding rod are rotatably connected to the inner wall of the fixed plate.

[0013] Furthermore, the crushing mechanism also includes a blower for connecting the stamping chamber and the mixing chamber. A mixing rod is rotatably arranged inside the mixing chamber. A central tube is opened inside the mixing rod along the length of the mixing rod. Several square grooves along the length of the mixing rod are equally spaced on the outer circumference of the mixing rod. Rock fragments output by the blower fall into the square grooves. A flow pipe is provided between the central tube and the square grooves. A filter block is provided inside the flow pipe.

[0014] Furthermore, an inlet pipe and an outlet pipe are provided on the side of the fixed plate, a sealing pipe is provided at the inlet end of the central pipe, the sealing pipe is sealed to the inlet pipe, a bearing ring is fixedly provided on the side of the mixing rod connected to the sealing pipe, the bearing ring is sealed to the sealing pipe for rotation, and the outlet pipe is connected to the output end of the mixing chamber.

[0015] Furthermore, a flow guide plate is provided between each pair of square grooves. The flow guide plate is located on the outer circumferential wall of the mixing rod and is connected to the central tube.

[0016] Furthermore, the input end of the crushing mechanism is connected to a funnel, the output end of the funnel is connected to the feed inlet through a pipe, and a push tube is sealed to the other side of the funnel.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. This invention is equipped with an adjustable load-bearing mechanism. By rotating the gap adjustment rod, the inclination of the load-bearing plate is adjusted, thereby adjusting the distance between the load-bearing plate and the punch of the press, so as to adjust the pressure of secondary crushing and avoid excessively large fragments. After being crushed by the press, the fragments slide on the load-bearing plate into the rough ring. Under the grinding action of the grinding rod, the fineness of the fragments is increased. The crushed rock is drawn into the mixing chamber by the fan, and water is discharged through the mixing rod to mix and discharge the crushed rock. Therefore, this adjustable secondary crushing device for rock jacking machine can efficiently and accurately perform secondary crushing and mixing of rock fragments, improving production efficiency and product quality.

[0019] 2. This invention is equipped with a mixing rod. The crushed fragments enter the mixing chamber 252. Under the action of the mixing rod 22, the fragments and water can be uniformly mixed. Water flows outward from the central pipe through the guide plate and the flow pipe. The outside of the mixing rod is moistened by the rotation. The crushed rocks adhere to the outside of the mixing rod as it rotates. When the attached crushed rocks rotate to the bottom of the mixing rod, the water seeps out from the central pipe under the action of gravity. Then the rock fragments detach from the adhesion on the outside of the mixing rod and fall down for mixing and discharge. This prevents the rock fragments from clumping due to the low water ratio during mixing, thus avoiding affecting the subsequent mixing and discharge and preventing clumping. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a cross-sectional view of the crushing mechanism of the present invention;

[0022] Figure 3 This is a schematic diagram of the adjustable load-bearing mechanism of the present invention;

[0023] Figure 4This is a schematic diagram of the stress plate structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the gap adjusting rod structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the hybrid rod structure of the present invention;

[0026] Figure 7 This is a side sectional view of the hybrid rod of the present invention.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Particle lifting mechanism; 2. Crushing mechanism; 21. Grinding rod; 22. Mixing rod; 221. Central tube; 222. Square groove; 223. Flow pipe; 224. Sealing pipe; 225. Bearing ring; 226. Drain plate; 227. Filter block; 23. Press; 24. Fan; 25. Housing; 251. Pressing chamber; 252. Mixing chamber; 253. Feed inlet; 26. Adjustable load-bearing mechanism; 261. Load-bearing plate; 262. Force plate; 2621. Inclined plate; 2622. Movable bar; 2623. Gap adjusting rod; 2624. Locking block; 2625. Connecting plate; 2626. Locking groove; 263. Spring; 264. Rubber plate; 265. Rough ring; 3. Fixing plate; 4. Water inlet pipe; 5. Water outlet pipe; 6. Funnel; 7. Pushing pipe. Detailed Implementation

[0029] To make the content of this invention easier to understand, the technical solutions of this invention will be further described below in conjunction with specific embodiments and accompanying drawings, but this invention is not limited thereto.

[0030] Example 1

[0031] Please see Figure 1 and Figure 2 The present invention provides a technical solution: an adjustable secondary crushing device for a rock jacking machine, comprising a fragment lifting mechanism 1 and a crushing mechanism 2. The crushing mechanism 2 includes a housing 25, and a connecting stamping chamber 251 and a mixing chamber 252 are provided inside the housing 25. A stamping machine 23 is provided inside the stamping chamber 251, and an adjustable load-bearing mechanism 26 is provided below the stamping machine 23. The fragment lifting mechanism 1 includes a lifting pipe and a first motor. The first motor drives the lifting pipe to move the rock fragments. A mixing rod 22 is provided inside the mixing chamber 252 to uniformly mix the fragments with water. The rock fragments that need to be crushed secondary are transported to the crushing mechanism 2 for secondary crushing and mixing and discharge.

[0032] The input end of the crushing mechanism 2 is connected to a hopper 6, which is located directly below the discharge port of the lifting pipe. Rock fragments enter the crushing mechanism 2 through the hopper 6. The output end of the hopper 6 is connected to the feed port 253 through a pipe. The other side of the hopper 6 is sealed with a push pipe 7, which pushes the rock fragments in the hopper 6 into the crushing mechanism 2.

[0033] Example 2

[0034] Please see Figure 1 and Figure 2 A fixed plate 3 is fixedly installed at the bottom of the housing 25. An adjustable load-bearing mechanism 26 is embedded in the fixed plate 3. The adjustable load-bearing mechanism 26 is inclined. The inclination of the punch of the press 23 is greater than the inclination of the adjustable load-bearing mechanism 26. A feed inlet 253 is opened on the side of the housing 25 near the pressing chamber 251. The feed inlet 253 is located between the adjustable load-bearing mechanism 26 and the press 23. Rock fragments in the funnel 6 enter the surface of the adjustable load-bearing mechanism 26 through the feed inlet 253. The fragments are crushed by the downward pressing of the press 23.

[0035] Combination Figure 3 The adjustable load-bearing mechanism 26 includes a load-bearing plate 261 and an angle-adjustable load-bearing plate 262. The load-bearing plate 261 is embedded in the fixed plate 3. A spring 263 is fixedly connected to the bottom of the load-bearing plate 262. The other end of the spring 263 is fixedly connected to the load-bearing plate 261. A rubber plate 264 is engaged with the side of the load-bearing plate 262 away from the feed port 253. A rough ring 265 is fixedly connected to the other side of the rubber plate 264. The bottom of the rough ring 265 is fixedly connected to the load-bearing plate 261. When rock fragments fall on the load-bearing plate 262, the press 23 presses downward while the load-bearing plate 262 moves downward, compressing the spring 263. However, under the action of the rubber plate 264, the load-bearing plate 262 will be subjected to an upward elastic force, which can drive the rock fragments to bounce to the right.

[0036] Combination Figure 4The load-bearing plate 262 includes two inclined plates 2621. The two inclined plates 2621 are hinged together on the side near the rubber plate 264. A movable strip 2622, made of rubber, is fixedly installed on the other side of the two inclined plates 2621. The movable strip 2622 fits against the inner wall of the load-bearing plate 261 to prevent gaps from forming between the load-bearing plate 262 and the inner wall of the load-bearing plate 261, thus preventing rock fragments from falling into the load-bearing plate 261. A gap adjustment rod 2623 is provided between the two inclined plates 2621. By rotating the gap adjustment rod 2623... This allows the upper inclined plate 2621 to rotate slightly around the hinge point, adjusting the angle between the two inclined plates 2621, thereby adjusting the inclination of the force plate 262, and thus changing the distance between the upper surface of the force plate 262 and the press 23. This allows for adjustment of the extrusion pressure of the press 23 crushing downwards, and adjustment of the gap resistance of the press 23 crushing downwards. In this way, the pressure of rock crushing in the gap can be adjusted without changing the force of the press 23, avoiding incomplete secondary crushing that results in excessively large rock fragments and preventing impact on subsequent mixing and discharge.

[0037] Combination Figure 5 The outer circumference of the gap adjusting rod 2623 is provided with several locking blocks 2624 of different sizes. The two inclined plates 2621 are respectively fixedly provided with connecting plates 2625 on opposite sides. Each connecting plate 2625 has a slot 2626 that cooperates with the locking block 2624. The locking blocks 2624 are all hemispherical and the slots 2626 are hemispherical grooves. One end of the gap adjusting rod 2623 passes through the fixed plate 3 and is rotatably connected to the fixed plate 3. By manually rotating the gap adjusting rod 2623, the distance between the gap adjusting rod 2623 and the connecting plate 2625 changes, thereby expanding or shrinking the included angle between the two inclined plates 2621, thereby adjusting the gap between the punch of the stamping machine 23 and the force plate 262.

[0038] Example 3

[0039] A rough ring 265 is fixedly connected to the other side of the rubber plate 264. The inner side of the rough ring 265 is relatively rough and has high friction. The bottom of the rough ring 265 is fixedly connected to the support plate 261. A grinding rod 21 is provided above the rough ring 265. The two ends of the grinding rod 21 are rotatably connected to the inner wall of the fixed plate 3. The outer surface of the grinding rod 21 is rough and has small grinding points distributed on it, which has a grinding effect. The side of the grinding rod 21 is connected to the output end of the second motor. The second motor is located inside the housing 25.

[0040] As can be seen from the above description, the rock fragments crushed by the press 23 enter the rough ring 265 and are further ground and pulverized under the action of the grinding rod 21.

[0041] Example 4

[0042] See Figure 6 and Figure 7 The crushing mechanism 2 also includes a blower 24 for connecting the stamping chamber 251 and the mixing chamber 252. The feed end of the blower 24 is close to the roughing ring 265, which can draw the rock fragments ground by the grinding rod 21 into the mixing chamber 252. A mixing rod 22 is rotatably installed in the mixing chamber 252. The mixing rod 22 can mix and discharge the crushed rock fragments by discharging water. The mixing rod 22 is connected to the output end of the third motor, which is fixedly installed in the mixing chamber 252. A central tube 221 is opened in the mixing rod 22 along the length of the mixing rod 22. Several square grooves 222 along the length of the mixing rod 22 are equally spaced on the outer circumference of the mixing rod 22. The discharge end of the blower 24 is located directly above the mixing rod 22. The third motor drives the mixing rod 22 to rotate, and the fragments after secondary crushing fall from above into the square grooves 222.

[0043] As a further preferred embodiment, a flow pipe 223 is provided between the central pipe 221 and several square grooves 222. A filter block 227 is provided inside the flow pipe 223. An inlet pipe 4 and an outlet pipe 5 are provided through the side of the fixing plate 3. A sealing pipe 224 is provided at the inlet end of the central pipe 221. The sealing pipe 224 is sealed and connected to the inlet pipe 4. A bearing ring 225 is fixedly provided on the side of the mixing rod 22 connected to the sealing pipe 224. The bearing ring 225 is sealed and rotatably connected to the sealing pipe 224. The outlet pipe 5 is connected to the output end of the mixing chamber 252. The inlet pipe 4 introduces water into the central pipe 221 through the sealing pipe 224, so that the mixing rod 22 rotates while draining water into the surrounding square grooves 222, so that the fragments and water in the square grooves 222 are mixed. When any square groove 222 rotates to the bottom, the mixed fragments and water fall to the bottom of the mixing chamber 252 under the action of gravity and are discharged through the outlet pipe 5.

[0044] As a further preferred embodiment, the arrangement of multiple square grooves 222 can make the gravel fall evenly into each square groove 222, avoiding the gravel clumping due to the large difference in the ratio of gravel to water, which would block the water outlet pipe 5.

[0045] As a further preferred embodiment, a diversion plate 226 is provided between the two square grooves 222. The diversion plate 226 is located on the outer circumference of the mixing rod 22 and is connected to the central pipe 221. The water in the central pipe 221 flows to the square grooves 222 and the diversion plate 226 respectively. The diversion pipe from the central pipe 221 to the diversion plate 226 is relatively thin, which can only wet the outer side of the mixing rod 22, making it easier for more rock fragments to adhere. Then, more water flows through the flow pipe 223 at the lower square groove 222 position, making the water-to-rock-fragment mixing ratio greater. As a result, the rock fragments detach from the adhesion to the outer side of the mixing rod 22 and fall to the bottom, preventing the rock fragments from clumping due to the low water ratio during mixing, thus avoiding affecting the subsequent mixing and discharge.

[0046] Working principle of the invention

[0047] First, rock fragments in the fragment lifting mechanism 1 are pushed into the crushing mechanism 2 through the funnel 6. The press 23 crushes the rock fragments downwards. The adjustable bearing mechanism 26 adjusts the gap resistance to prevent the fragments from being too large. Next, the crushed fragments enter the roughing ring 265 and are ground again by the grinding rod 21. Then, the blower 24 draws the fragments ground by the grinding rod 21 into the mixing chamber 252. The fragments fall evenly into each square groove 222. The mixing rod 22 mixes the fragments by discharging water. Finally, the mixed fragments and water are discharged through the water outlet pipe 5.

[0048] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An adjustable secondary crushing device for a rock pipe jacking machine, comprising a crushing mechanism (1) and a crushing mechanism (2), characterized in that: The crushing mechanism (2) includes a housing (25), in which a connecting stamping chamber (251) and a mixing chamber (252) are provided. A stamping machine (23) is provided in the stamping chamber (251), and an adjustable load-bearing mechanism (26) is provided below the stamping machine (23). A mixing rod (22) for uniformly mixing the crushed pieces with water is provided in the mixing chamber (252). The crushed piece lifting mechanism (1) transports the rock crushed pieces that need to be crushed to the crushing mechanism (2) for secondary crushing and mixing and discharge. A fixing plate (3) is fixedly installed at the bottom of the housing (25), and the adjustable bearing mechanism (26) is embedded in the fixing plate (3). The inclination of the punch of the press (23) is greater than the inclination of the adjustable bearing mechanism (26). A feed inlet (253) is opened on the side of the housing (25) near the stamping chamber (251). The feed inlet (253) is located between the adjustable bearing mechanism (26) and the press (23). The adjustable load-bearing mechanism (26) includes a load-bearing plate (261) and an angle-adjustable load-bearing plate (262). The load-bearing plate (261) is embedded in the fixed plate (3). A spring (263) is fixedly connected to the bottom of the load-bearing plate (262). The other end of the spring (263) is fixedly connected to the load-bearing plate (261). A rubber plate (264) is engaged with the side of the load-bearing plate (262) away from the feed inlet (253). A rough ring (265) is fixedly connected to the other side of the rubber plate (264). The bottom of the rough ring (265) is fixedly connected to the load-bearing plate (261). The crushing mechanism (2) also includes a blower (24) for connecting the stamping chamber (251) and the mixing chamber (252). A mixing rod (22) is rotatably arranged in the mixing chamber (252). A central tube (221) is opened in the mixing rod (22) along the length of the mixing rod (22). A plurality of square grooves (222) along the length of the mixing rod (22) are equally spaced on the outer circumference of the mixing rod (22). Rock fragments output by the blower (24) fall into the square grooves (222). A flow pipe (223) is provided between the central tube (221) and the plurality of square grooves (222). A filter block (227) is provided in the flow pipe (223).

2. The adjustable secondary crushing device for a rock jacking machine according to claim 1, characterized in that: The load-bearing plate (262) includes two inclined plates (2621), which are hinged to each other on the side near the rubber plate (264). A movable strip (2622) is fixedly installed on the other side of the two inclined plates (2621). The movable strip (2622) is in contact with the inner wall of the load-bearing plate (261). A gap adjustment rod (2623) is provided between the two inclined plates (2621).

3. The adjustable secondary crushing device for a rock jacking machine according to claim 2, characterized in that: The outer circumferential wall of the gap adjusting rod (2623) is provided with several locking blocks (2624) of different sizes. A connecting plate (2625) is fixedly provided on the opposite side of the two inclined plates (2621). Each of the connecting plates (2625) has a slot (2626) that cooperates with the locking block (2624). One end of the gap adjusting rod (2623) passes through the fixed plate (3) and is rotatably connected to the fixed plate (3).

4. The adjustable secondary crushing device for a rock jacking machine according to claim 1, characterized in that: A grinding rod (21) is provided above the rough ring (265), and the two ends of the grinding rod (21) are rotatably connected to the inner wall of the fixed plate (3).

5. The adjustable secondary crushing device for a rock jacking machine according to claim 1, characterized in that: The side of the fixed plate (3) is provided with an inlet pipe (4) and an outlet pipe (5). The inlet end of the central pipe (221) is provided with a sealing pipe (224). The sealing pipe (224) is sealed to the inlet pipe (4). The side of the mixing rod (22) connected to the sealing pipe (224) is fixedly provided with a bearing ring (225). The bearing ring (225) is sealed to the sealing pipe (224). The outlet pipe (5) is connected to the output end of the mixing chamber (252).

6. The adjustable secondary crushing device for a rock jacking machine according to claim 1, characterized in that: A flow guide plate (226) is provided between each pair of square grooves (222). The flow guide plate (226) is located on the outer circumferential wall of the mixing rod (22) and is connected to the central tube (221).

7. The adjustable secondary crushing device for a rock jacking machine according to claim 1, characterized in that: The input end of the crushing mechanism (2) is connected to a funnel (6), the output end of the funnel (6) is connected to the feed inlet (253) through a pipe, and the other side of the funnel (6) is sealed with a push tube (7).

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