Sand layer density measuring device for earth pressure balance type push bench construction

Abstract

The utility model relates to the technical field of density measurement, in particular to a sand layer density measuring device for construction of an earth pressure balance type push bench, which comprises a support base, a hopper is arranged above the support base, an auxiliary mounting frame is arranged outside the hopper, a material receiving barrel is arranged on the hopper and positioned under a discharge port, and the auxiliary mounting frame is arranged on the material receiving barrel. And a discharging control mechanism is arranged above the containing hopper. When the device is used, the design that the supporting height of the supporting rod can be freely adjusted in the adjusting cylinder is matched with the locking effect of the threaded groove and the positioning bolt, so that the device can freely adjust the material containing hopper to a proper supporting height according to the mesh number of a sand sample; furthermore, the height of the follow-up sand sample free falling body is effectively controlled and adjusted, even if the mesh number of the sampled sand sample is extremely small, it can be guaranteed that the sand sample can accurately fall into the material receiving barrel through the design of adjusting the height of the sand sample free falling body, and the overall practical effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of density measurement, in particular to a sand layer density measurement device for the construction of an earth pressure balance pipe jacking machine. Background Technique

[0002] In recent years, the mechanical pipe jacking construction technology has developed rapidly in the field of underground engineering in China. This technology has the advantages of small disturbance to the soil body during construction, controllable ground settlement, high degree of mechanization, high safety and efficiency, low carbon and energy saving, etc. It has become one of the optimal methods for trenchless construction of underground pipelines and is widely used in the construction of pipelines such as water supply, drainage, sewage, gas, heat, electricity, and cables. The commonly used mechanical pipe jacking is divided into two categories: earth pressure balance type and slurry balance type. Among them, the basic principle of the earth pressure balance pipe jacking machine is that the motor drives and rotates the cutter head through a speed reducer installed on the bulkhead. The cutter head cuts the face and improves the soil body of the cut soil in the soil bin to form a plastic soil mass. The discharge amount of soil in the soil bin is controlled by a screw conveyor to balance the soil pressure and groundwater pressure on the face. A feeding port of the screw conveyor is arranged at the lower part of the pipe jacking machine, and the cut muck is discharged through the screw conveyor. Since the front shell of the pipe jacking machine is separated by a bulkhead into the front soil pressure chamber and the rear power chamber, groundwater cannot penetrate in, so the earth pressure balance pipe jacking machine can carry out pipe jacking construction below the high groundwater level and can effectively control ground settlement.

[0003] If the content of clay particles and silt particles in the sand layer or sandy gravel layer where the pipe jacking machine is located is less than 30%, it is necessary to inject soil improvement materials into the soil bin and stir them together with the cut soil and sand. Only when the soil in the soil bin is improved to have good plasticity, fluidity and water impermeability, the stirring is considered successful and the addition of the soil improvement materials is considered reasonable.

[0004] The density of the sand layer is an important reference basis for soil improvement. In order to make the selection and proportion of soil improvement materials in the construction of the earth pressure balance pipe jacking machine more reasonable and the construction safer, therefore, it is necessary to measure the density of the sand layer in the pipe jacking construction area in advance.

[0005] Due to the differences in the mesh number of sand samples under different geological conditions, the smaller the mesh number, the lighter the sand sample. Furthermore, in the process of free-fall sampling, it is easier to have the phenomenon of the falling trajectory deviation during the falling process, so that the sand sample cannot accurately fall into the inside of the receiving cylinder, thus affecting the subsequent experimental measurement results. Moreover, the existing measurement devices all sample the sand sample at a fixed falling height, and the overall practicability is somewhat poor. Content of the Utility Model

[0006] The utility model aims at the above problems and provides a sand layer density measurement device for the construction of an earth pressure balance pipe jacking machine with a simple structure and improved reliability.

[0007] The technical solution of the utility model is as follows: a sand layer density measuring device for the construction of an earth pressure balance pipe jacking machine, including a support base, a material receiving hopper is arranged above the support base, an auxiliary installation frame is arranged outside the material receiving hopper, the auxiliary installation frame is connected to the support base through an auxiliary adjustment mechanism, a receiving barrel is arranged directly below the discharge port of the material receiving hopper, the receiving barrel is connected to the support base, and a discharge control mechanism is arranged above the material receiving hopper.

[0008] The discharge control mechanism includes a positioning support frame, an electric push rod, a limiting rod and a sealing plug. A positioning support frame is arranged on the outer wall of the top end of the auxiliary installation frame. The positioning support frame is in an inverted L shape, and an electric push rod is arranged at the bottom of the horizontal end of the positioning support frame. The output end of the electric push rod is connected to the top end of the limiting rod, and a sealing plug is arranged at the bottom end of the limiting rod. The sealing plug is used for clamping and installing in the discharge port of the material receiving hopper.

[0009] The auxiliary adjustment mechanism includes an adjustment cylinder and a limiting disc. The adjustment cylinders are evenly arranged in a ring shape at the top end of the support base. A limiting disc is slidably installed inside the adjustment cylinder, and limiting convex blocks are symmetrically arranged on the outer walls of both sides of the limiting disc.

[0010] Limiting grooves are symmetrically arranged on the inner walls of both sides of the adjustment cylinder, and the limiting convex blocks and the limiting grooves are slidably installed. A support rod is arranged on the outer wall of the top end of the limiting disc.

[0011] The side outer wall of the adjustment cylinder is evenly penetrated and provided with first threaded grooves. The side outer wall of the support rod near the bottom end is penetrated and provided with second threaded grooves. The first threaded grooves and the second threaded grooves are threadedly installed with positioning bolts.

[0012] The receiving barrel is connected to the support base through a positioning support mechanism. The positioning support mechanism includes a placement groove and a limiting sleeve. A placement groove is arranged on the outer wall of the top end of the support base at the position of the discharge port of the material receiving hopper. Column-shaped grooves are evenly arranged in a surrounding manner on the side inner wall of the support base at the position of the placement groove, and a limiting sleeve is arranged inside the column-shaped groove.

[0013] A limiting piston rod is slidably installed inside the limiting sleeve. A support spring is connected between the side outer wall of the limiting piston rod and the bottom inner wall of the limiting sleeve.

[0014] The extending end of the limiting piston rod is arranged outside the limiting sleeve, and the extending end of the limiting piston rod is connected to the side outer wall of the clamping plate. A friction pad is arranged on the side outer wall of the clamping plate. The clamping plate and the friction pad are both arranged inside the placement groove.

[0015] Both the clamping plate and the friction pad are arranged in an arc shape.

[0016] When the utility model is in use, through the design that the support rod can be freely adjusted in height inside the adjusting cylinder and the locking effect of the threaded groove and the positioning bolt, the device can freely adjust the support height of the material receiving hopper according to the mesh size of the sand sample, and then effectively control and adjust the height of the subsequent free fall of the sample sand. Even if the sampled sand sample has extremely fine mesh, at this time, the height of the free fall of the sand sample can be adjusted to ensure that the sand sample can accurately fall into the inside of the material receiving cylinder. The overall structure design is simple and the practical effect is good.

[0017] At the same time, when in use, by using the design that the spring will generate a synchronous acting force when being squeezed and the combined transmission of parts, the device can conveniently position the material receiving cylinder in the middle position of the three clamping plates. Further, by adding a friction pad on the side of the clamping plate, the contact friction force between the device and the material receiving cylinder is increased through the friction pad, so as to achieve the effect of stably positioning the material receiving cylinder, ensuring the stability of the subsequent sand receiving process. At the same time, through the design of limiting and supporting the material receiving cylinder, there is no need for the staff to manually adjust and position the material receiving cylinder and the material receiving hopper. The overall structure design is simple and the practical effect is good. Brief Description of the Drawings

[0018] Figure 1 is the overall three-dimensional structure schematic diagram of the utility model;

[0019] Figure 2 is the three-dimensional structure schematic diagram of the discharge control mechanism of the utility model;

[0020] Figure 3 is the three-dimensional structure schematic diagram of the auxiliary adjustment mechanism of the utility model;

[0021] Figure 4 is the Figure 3 enlarged three-dimensional structure schematic diagram at A in the utility model;

[0022] Figure 5 is the three-dimensional structure schematic diagram of the positioning support mechanism of the utility model;

[0023] Figure 6 is the Figure 5 enlarged three-dimensional structure schematic diagram at B in the utility model;

[0024] In the figure: 1, support base; 2, material receiving hopper; 3, auxiliary mounting frame; 4, material receiving cylinder;

[0025] 5, discharge control mechanism; 51, positioning support frame; 52, electric push rod; 53, limiting rod; 54, sealing plug;

[0026] 6, auxiliary adjustment mechanism; 61, adjusting cylinder; 62, limiting disc; 63, support rod; 64, first threaded groove; 65, second threaded groove; 66, positioning bolt;

[0027] 7. Positioning and supporting mechanism; 71. Placing groove; 72. Limiting sleeve; 73. Limiting piston rod; 74. Supporting spring; 75. Clamping plate; 76. Friction pad. Detailed implementation manner

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] As Figures 1-6 shown, a sand layer density measuring device for the construction of an earth pressure balance pipe jacking machine includes a support base 1. Above the support base 1, there is a material receiving hopper 2. An auxiliary mounting frame 3 is arranged outside the material receiving hopper 2. The auxiliary mounting frame 3 is connected to the support base 1 through an auxiliary adjusting mechanism 6. A receiving cylinder 4 is arranged directly below the discharge port of the material receiving hopper 2. The receiving cylinder 4 is connected to the support base 1. Above the material receiving hopper 2, there is a discharge control mechanism 5. The discharge control mechanism 5 includes a positioning support frame 51, an electric push rod 52, a limiting rod 53, and a sealing plug 54. A positioning support frame 51 is arranged on the outer wall of the top end of the auxiliary mounting frame 3. The positioning support frame 51 is in an inverted L shape, and an electric push rod 52 is arranged at the bottom of the horizontal end of the positioning support frame 51. The output end of the electric push rod 52 is connected to the top end of the limiting rod 53. A sealing plug 54 is arranged at the bottom end of the limiting rod 53. The sealing plug 54 is used for snap-fitting and installing in the discharge port of the material receiving hopper 2.

[0030] When it is necessary to measure the density of the sand sample, first, the sand sample to be measured needs to be processed and then poured into the hopper 2. Note that when pouring, it is necessary to ensure that the sealing plug 54 is in a tightened state so that the sample sand will not leak directly. Then, place the receiving cylinder 4 under the hopper 2 to receive the sand. At this time, only need to control the electric push rod 52 to retract. When the electric push rod 52 retracts, its extending end will automatically retract and drive the limiting rod 53 to move upward. Then, when the limiting rod 53 moves upward, it will automatically pull out the sealing plug 54 from the discharge port of the hopper 2. Then, the sand sample in the hopper 2 will automatically fall freely through the discharge port into the receiving cylinder 4. When the receiving cylinder 4 is filled with sand sample, control the electric push rod 52 to start. After the electric push rod 52 starts, its extending end will automatically extend downward and drive the limiting rod 53 to move downward. Then, when the limiting rod 53 moves downward, it will automatically drive the sealing plug 54 to move downward and re-seal the discharge port of the hopper 2 to achieve the effect of stopping sand supply. Then, use a ruler to scrape the excess sand at multiple places of the receiving cylinder 4 horizontally. Then, send the receiving cylinder 4 together with the sand inside it to an electronic scale for weighing. The specific density calculation method is calculated according to the existing calculation method. The required mass and volume have been provided, and the calculation method is a conventional operation technical means and will not be described in detail here.

[0031] The auxiliary adjustment mechanism 6 includes an adjustment cylinder 61 and a limit disk 62. The adjustment cylinders 61 are evenly arranged in a ring at the top end of the support base 1. The limit disk 62 is slidably installed inside the adjustment cylinder 61. Limit protrusions are symmetrically opened on the outer walls on both sides of the limit disk 62. Limit grooves are symmetrically opened on the inner walls on both sides of the adjustment cylinder 61, and the limit protrusions and the limit grooves are slidably installed. A support rod 63 is provided on the outer wall of the top end of the limit disk 62. First threaded grooves 64 are evenly and penetratingly opened on the outer wall of the side of the adjustment cylinder 61 at equal intervals. A second threaded groove 65 is penetratingly opened on the outer wall of the side of the support rod 63 near the bottom end. The first threaded groove 64 and the second threaded groove 65 are threadedly installed with a positioning bolt 66. When it is necessary to adjust the support legs to a suitable support height according to the mesh number of the sand sample, first, the positioning bolt 66 needs to be completely screwed out from the inside of the first threaded groove 64. Then, the support rod 63 changes from the locked state to the movable state. Then, directly pull the support rod 63 and adjust it to a suitable support height. Then, when the support rod 63 moves, it will automatically drive the limit disk 62 to move. Then, when the limit disk 62 moves, it will automatically drive the limit protrusions to slide inside the limit grooves and play a limiting and supporting effect on the movement of the limit disk 62. When the support rod 63 moves to a suitable height, pass the positioning bolt 66 through the corresponding first threaded groove 64 and screw it to the bottom end of the second threaded groove 65 to complete the height adjustment work of the support legs.

[0032] The material receiving barrel 4 is connected to the supporting base 1 through a positioning support mechanism 7, which includes a placement groove 71 and a limiting sleeve 72. The top outer wall of the supporting base 1 located at the discharge port of the material hopper 2 is provided with a placement groove 71, and the side inner wall of the supporting base 1 located at the position of the placement groove 71 is uniformly spaced and surrounded with cylindrical grooves, and a limiting sleeve 72 is arranged inside the cylindrical groove, and a limiting piston rod 73 is slidably installed inside the limiting sleeve 72, and a supporting spring 74 is connected between the side outer wall of the limiting piston rod 73 and the bottom inner wall of the limiting sleeve 72, and the protruding end of the limiting piston rod 73 is arranged on the outside of the limiting sleeve 72, and the protruding end of the limiting piston rod 73 is connected to the side outer wall of the clamping plate 75, and the side outer wall of the clamping plate 75 is provided with a friction pad 76, and the clamping plate 75 and the friction pad 76 are both arranged inside the placement groove 71; before measurement, it is necessary to first position and support the docking barrel 4, When the locking cam 75 is in the locked state, the locking cam 73 is in the locked state, and the locking cam 73 is in the locked state, so that the locking cam 73 can be locked to the locking cam 73 when the locking cam 73 is in the locked state.

[0033] The clamping plate 75 and the friction pad 76 are both configured as arc structures, and the top outer wall of the friction pad 76 is configured as an arc structure; here, the clamping plate 75 and the friction pad 76 are both configured as arc structures so that their appearance matches the outer wall shape of the above-mentioned material receiving barrel 4, so that the material barrel 4 can be better resisted and clamped, and the top outer wall of the friction pad 76 is configured as an arc structure so that the above-mentioned material receiving barrel 4 is less resisted when inserted into the middle position of the three friction pads 76, and it is more convenient.

[0034] When the utility model is in use, first, the support legs need to be adjusted to an appropriate support height according to the mesh number of the sand sample. At this time, the positioning bolt 66 needs to be completely screwed out from the inside of the first thread groove 64. Then, the support rod 63 changes from the locked state to the movable state. Subsequently, directly pull the support rod 63 to adjust it to an appropriate support height. Then, the movement of the support rod 63 will automatically drive the limit disc 62 to move. Subsequently, the movement of the limit disc 62 will automatically drive the limit convex block to slide inside the limit groove and play a limit support effect on the movement of the limit disc 62. When the support rod 63 moves to an appropriate height, pass the positioning bolt 66 through the corresponding first thread groove 64 and screw it to the bottom end of the second thread groove 65 to complete the height adjustment of the support leg;

[0035] Subsequently, position and support the material receiving cylinder 4. At this time, only need to push the material receiving cylinder 4 from top to bottom to the middle position of the three friction pads 76. Then, the friction pads 76 automatically move to the side under the resistance force and provide a certain placement space for the material receiving cylinder 4. At the same time, the movement of the friction pads 76 will also synchronously drive the clamping plate 75 to move. When the clamping plate 75 moves, it will automatically drive the limit piston rod 73 to slide inside the limit sleeve 72. At this time, the support spring 74 is in a contracted state under the extrusion of the limit piston rod 73. When the material receiving cylinder 4 moves to contact the inner wall of the bottom end of the placement groove 71, release the material receiving cylinder 4. At this time, the material receiving cylinder 4 is not affected by the manually applied external force. The reaction force generated by the extrusion of the above support spring 74 will automatically push the limit piston rod 73 to move. Then, the movement of the limit piston rod 73 will automatically drive the clamping plate 75 to move so that the friction pads 76 are attached to the outer side wall of the material receiving cylinder 4, thereby achieving a stable limiting effect on the material receiving cylinder 4;

[0036] When it is necessary to measure the density of a sand sample, first, the sand sample to be measured needs to be processed and then poured into the hopper 2. Note that when pouring, it is necessary to ensure that the sealing plug 54 is in a tightened state so that the sample sand will not leak directly. Subsequently, place the receiving cylinder 4 under the hopper 2 to receive the sand. At this time, only need to control the electric push rod 52 to retract. Then, when the electric push rod 52 retracts, its extending end will automatically retract and drive the limiting rod 53 to move upward. Subsequently, when the limiting rod 53 moves upward, it will automatically pull out the sealing plug 54 from the discharge port of the hopper 2. Then, the sand sample inside the hopper 2 will automatically fall freely through the discharge port into the receiving cylinder 4. When the receiving cylinder 4 is filled with sand sample, control the electric push rod 52 to start. Then, after the electric push rod 52 starts, its extending end will automatically extend downward and drive the limiting rod 53 to move downward. Subsequently, when the limiting rod 53 moves downward, it will automatically drive the sealing plug 54 to move downward and then re-seal the discharge port of the hopper 2 to achieve the effect of stopping sand supply. Then, use a ruler to level the excess sand in multiple parts of the receiving cylinder 4 along the horizontal direction. Then, send the receiving cylinder 4 together with the sand inside it to an electronic scale for weighing. The specific density calculation method can be calculated according to the existing calculation method. The required mass and volume have been provided, and the calculation method is an existing conventional operation technical means, so no more description will be made here.

[0037] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sand layer density measuring device for the construction of an earth pressure balance pipe jacking machine, including a support base, characterized in that, Above the support base is provided a material hopper. An auxiliary mounting frame is arranged outside the material hopper. The auxiliary mounting frame is connected to the support base through an auxiliary adjusting mechanism. A receiving cylinder is arranged directly below the discharge port of the material hopper, and the receiving cylinder is connected to the support base. Above the material hopper is provided a discharge control mechanism. The discharge control mechanism includes a positioning support frame, an electric push rod, a limiting rod, and a sealing plug. The top outer wall of the auxiliary mounting frame is provided with a positioning support frame. The positioning support frame is in an inverted L shape, and an electric push rod is arranged at the bottom of the horizontal end of the positioning support frame. The output end of the electric push rod is connected to the top end of the limiting rod, and a sealing plug is arranged at the bottom end of the limiting rod. The sealing plug is used for snap-fitting installation in the discharge port of the material hopper.

2. The sand layer density measuring device for the construction of an earth pressure balance pipe jacking machine according to claim 1, characterized in that: The auxiliary adjusting mechanism includes an adjusting cylinder and a limiting disk. The adjusting cylinders are evenly arranged in a ring at the top of the support base. A limiting disk is slidably installed inside the adjusting cylinder. Limiting protrusions are symmetrically opened on both outer walls of the limiting disk.

3. The sand layer density measuring device for earth pressure balance pipe jacking machine construction according to claim 2, wherein: Limiting grooves are symmetrically opened on both inner walls of the adjusting cylinder, and the limiting protrusions are slidably installed with the limiting grooves. A support rod is arranged on the top outer wall of the limiting disk.

4. The sand layer density measuring device for the construction of an earth pressure balance pipe jacking machine according to claim 3, characterized in that: First threaded grooves are evenly and through-opened on the side outer wall of the adjusting cylinder. A second threaded groove is through-opened on the side outer wall of the support rod near the bottom end. The first threaded groove and the second threaded groove are threadedly installed with a positioning bolt.

5. The sand layer density measuring device for the construction of an earth pressure balance pipe jacking machine according to claim 1, wherein: The receiving cylinder is connected to the support base through a positioning support mechanism. The positioning support mechanism includes a placement groove and a limiting sleeve. A placement groove is opened on the top outer wall of the support base at the position of the discharge port of the material hopper. Column-shaped grooves are evenly and circumferentially opened on the side inner wall of the support base at the position of the placement groove, and a limiting sleeve is arranged inside the column-shaped groove.

6. The sand layer density measuring device for the construction of an earth pressure balance pipe jacking machine according to claim 5, characterized in that: A limiting piston rod is slidably installed inside the limiting sleeve. A support spring is connected between the side outer wall of the limiting piston rod and the bottom inner wall of the limiting sleeve.

7. The sand layer density measuring device for the construction of an earth pressure balance pipe jacking machine according to claim 6, characterized in that: The extending end of the limiting piston rod is arranged outside the limiting sleeve, and the extending end of the limiting piston rod is connected to the side outer wall of the clamping plate. A friction pad is arranged on the side outer wall of the clamping plate. Both the clamping plate and the friction pad are arranged inside the placement groove.

8. The sand layer density measuring device for the construction of the earth pressure balance pipe jacking machine according to claim 7, characterized in that: Both the clamping plate and the friction pad are arranged in an arc structure.

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