Screw pile cap former

Abstract

The invention provides a screw pile cap former which is characterized in that a connecting station corresponding to a driving shaft of a drilling machine is arranged above a main body, a forming part is connected to the lower edge of the main body in a hinged mode, a cutting ring groove corresponding to a screw pile is formed below the forming part, and at least one notch is formed in the cutting ring groove and serves as a soil inlet channel; the cutter is concentrically and rotatably connected to the bottom of the forming part, the forming part rotates forwards, the cutter head opens the soil inlet channel, and the cutter head cuts soil and enables the soil to enter the main body through the soil inlet channel; the forming piece rotates reversely to close the soil inlet channel. The forming device is provided with a rotationally-connected cutter, the cutter rotates forwards to form a soil cutting structure, cut soil enters a main body through a soil inlet channel along with rotation, the cutter seals the soil inlet channel under the action of friction force of a soil layer, at the moment, the forming device can be lifted, the soil is taken out, and the functions of cutting, soil inlet and soil taking are integrated. The problems that in the prior art, pile cap forming efficiency is low, and quality is poor are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of pile foundation construction, and particularly relates to a screw pile cap former. Background Art

[0002] Currently, the screw pile cap forming process commonly used in engineering practice is the external soil extrusion construction technology. There are two significant technical difficulties in the implementation of this process: First, due to the extrusion effect of the former, a large amount of soil accumulates around the pile, resulting in a significant surface uplift phenomenon; Second, affected by the uncontrollability of soil displacement, the control accuracy of the pile cap elevation during construction is insufficient, directly affecting the foundation construction quality of the structure.

[0003] Therefore, an improved technical solution is needed to address the above deficiencies in the prior art. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above deficiencies in the prior art, and the present invention provides a screw pile cap former.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A screw pile cap former, comprising:

[0007] A main body, the main body is a cap-shaped structure adapted to the outer diameter of the screw pile cap, and a connection station corresponding to the driving shaft of the drill is provided above the main body;

[0008] A forming member, the forming member is a rotating body adapted to the main body, and the forming member is connected to the lower edge of the main body in a hinged form to longitudinally rotate and close or open the main body; a cutting ring groove corresponding to the screw pile is provided below the forming member, and there is at least one notch on the cutting ring groove as a soil inlet channel;

[0009] A tool, the tool is concentrically rotatably connected to the bottom of the forming member, a cutting head is slidably assembled along the cutting ring groove at the end of the tool, and a stopper corresponding to the soil inlet channel is provided on the cutting head;

[0010] In response to driving the forming member to rotate forward, the cutting head opens the soil inlet channel, the cutting head cuts the soil and the soil enters the interior of the main body through the soil inlet channel;

[0011] In response to driving the forming member to rotate backward, the cutting head closes the soil inlet channel to enclose the soil inside the main body.

[0012] Preferably, the cutting head is a portal structure corresponding to the cutting ring groove, a cutting edge is provided on the side of the cutting head corresponding to the forward direction, and the cutting edge is adapted to the bottom of the cutting ring groove.

[0013] Preferably, the stopper is a block-shaped or columnar structure, and a clamping station matched with the stopper is provided on the side of the cutting ring groove corresponding to the positive direction of the soil entry channel.

[0014] Preferably, the stopper is arranged on a side of the cutter head close to the blade body, and the middle part of the blade body is inclined downward.

[0015] Preferably, there are two soil entry channels, and the two soil entry channels are symmetrically distributed about the molded part;

[0016] Correspondingly, one cutter head is respectively provided at both ends of the cutter.

[0017] Preferably, the molded part is a cover-like structure with an opening facing upward, and the outer wall of the molded part is a conical surface extending to the cutting ring groove.

[0018] Preferably, a plurality of excavation openings evenly distributed around the circumference of the main body are provided above the main body.

[0019] Preferably, the molded part is hinged via a hinge axis tangent to the outer wall of the main body, and a locking mechanism corresponding to the molded part is provided on the other side of the main body.

[0020] Preferably, the locking mechanism comprises a sheath, a hook, a locking member and a hanging ring;

[0021] The sheath is arranged on the inner wall of the main body, the middle part of the hook is hingedly connected to the lower edge of the sheath, and the hanging ring is arranged on the molded part and extends upward into the sheath after the molded part is buckled;

[0022] The upper end of the hook is hinged with a connecting rod extending upward from the main body, so that the hook is driven by the connecting rod, and the portion of the connecting rod extending upward from the main body is threadedly assembled with the locking piece corresponding to the locking piece that blocks the main body.

[0023] Preferably, a polygonal sleeve corresponding to the drilling rig drive shaft is provided in the middle of the main body, and the polygonal section below the drilling rig drive shaft extends into the polygonal sleeve and is fixed by a pin.

[0024] Beneficial effect: The former is provided with a rotatably connected tool, which forms a soil cutting structure by forward rotation. As it rotates, the cut soil enters the main body through the soil entry channel. After a certain period of time, the former is reversed, and the tool closes the soil entry channel under the friction of the soil layer. At this time, the former can be lifted and the soil can be taken out, integrating the cutting, soil entry and soil taking functions into one, solving the problems of low efficiency and poor quality of pile cap forming in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings of the specification, which form a part of this application, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0026] Figure 1 It is a schematic diagram of the use of the former in the specific embodiment provided by the present invention;

[0027] Figure 2 It is a sectional view of the former in the specific embodiment provided by the present invention;

[0028] Figure 3 It is a schematic diagram of the opening device of the former in the specific embodiment provided by the present invention;

[0029] Figure 4 It is a top view of the former in the specific embodiment provided by the present invention;

[0030] Figure 5 It is a bottom view of the former part in the specific embodiment provided by the present invention;

[0031] Figure 6 It is a structural diagram of the cutter in the specific embodiment provided by the present invention;

[0032] Figure 7 It is a schematic diagram of the forward rotation state of the former in the specific embodiment provided by the present invention;

[0033] Figure 8 It is a schematic diagram of the reverse rotation state of the former in the specific embodiment provided by the present invention.

[0034] In the figure: 1. Drill drive shaft; 2. Main body; 3. Former part; 4. Screw pile; 5. Multi-faceted sleeve; 6. Soil inlet channel; 7. Cutter; 8. Tool bit; 9. Stopper; 10. Hanging ring; 11. Sheath; 12. Connecting rod; 13. Locking part; 14. Hook; 15. Cutting ring groove; 16. Soil outlet; 17. Clamping station; 18. Blade body. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described. 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 belong to the scope of protection of the present invention.

[0036] In the description of the present invention, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The terms "connected" and "coupled" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0038] As Figure 1-8 shown, a screw pile cap former is used to form a pouring groove for a screw pile cap and is driven by a helical drill. It includes a main body 2, a forming member 3, and a cutter 7. The main body 2 has a cap-like structure, and its outer diameter is adapted to the outer diameter of the screw pile cap to be formed. A connection station corresponding to the driving shaft 1 of the drill is provided above the main body 2. The driving shaft 1 of the drill is connected to the main body 2 in a detachable manner, so as to drive the main body 2 to rotate.

[0039] The forming member 3 is a rotating body adapted to the main body 2. The forming member 3 can be in a groove shape or a disk shape. The forming member 3 is connected to the lower edge of the main body 2 in a hinged form. The hinge shaft of the forming member 3 extends in the horizontal direction. Hinge seats corresponding to the hinge shaft are provided on both the forming member 3 and the main body 2, so as to longitudinally rotate and close or open the main body 2; a cutting ring groove 15 corresponding to the screw pile 4 is provided below the forming member 3. The cutting ring groove 15 protrudes downward, so as to serve as a structure for discharging soil during rotation. At least one notch is provided on the cutting ring groove 15 as an earth inlet passage 6. During rotation, the drill drives the forming member 3 downward according to the actual progress, so as to squeeze the soil into the earth inlet passage 6.

[0040] The cutting ring groove 15 is annular, and its inner diameter is adapted to the outer diameter of the screw pile 4, and its height is not less than the distance between the upper end face of the screw pile 4 and the bottom of the pouring groove, so as to form an annular groove on the upper end of the screw pile 4 to serve as a pile cap.

[0041] The cutter 7 is concentrically and rotationally connected to the bottom of the forming member 3 and can rotate below the forming member 3. A cutter head 8 is slidably assembled along the cutting ring groove 15 at the end of the cutter 7. The shape of the cutter head 8 is adapted to the shape of the cutting ring groove 15. A stopper 9 corresponding to the soil inlet channel 6 is provided on the cutter head 8, so as to limit the rotation angle of the cutter head 8, and the cutter head 8 can rotate and open or close the soil inlet channel 6 at the soil inlet channel 6.

[0042] In response to driving the forming member 3 to rotate forward, under the action of soil friction, the cutter head 8 rotates relative to the cutting ring groove 15 to open the soil inlet channel 6. As it rotates, the soil below is cut by the cutter head 8, and the cut soil enters the interior of the main body 2 through the soil inlet channel 6, thereby forming a pouring groove corresponding to the screw pile cap.

[0043] In response to driving the forming member 3 to rotate reversely, under the action of soil friction, the cutter head 8 closes the soil inlet channel 6 to seal the soil inside the main body 2. At this time, when the main body 2 is lifted upward, the soil can be taken out. After the forming member 3 is opened, the soil body is unloaded into a slag truck and transported away from the site.

[0044] In an alternative embodiment, the cutter head 8 is a gate-shaped structure corresponding to the cutting ring groove 15. The cutter head 8 specifically includes three sections corresponding to the two side walls and the bottom of the cutting ring groove 15. One outer wall section of the cutter head 8 corresponding to the outside of the cutting ring groove 15 extends to the upper edge of the forming member 3 through an inclined surface, thereby forming a complete outer wall. A cutting edge 18 is provided on one side of the cutter head 8 corresponding to the forward direction (the section corresponding to the bottom of the cutting ring groove 15). In order to ensure cutting when the soil inlet channel 6 is open, the cutting edge 18 extends in the forward rotation direction and its length is adapted to the bottom of the cutting ring groove 15, so as to cut the soil below.

[0045] In an alternative embodiment, the stopper 9 is a block-shaped or columnar structure. The stopper 9 extends into the soil inlet channel 6, so that the cutter head 8 is limited to open and close on one side of the soil inlet channel 6. A clamping station 17 adapted to the stopper 9 is provided on the side of the cutting ring groove 15 corresponding to the forward direction of the soil inlet channel 6. The clamping station 17 is a notch for assembling the stopper 9.

[0046] There can be two stoppers 9, one is arranged at one end corresponding to the bottom of the cutting ring groove 15, and the other is arranged on one outer wall section corresponding to the cutting ring groove 15.

[0047] Furthermore, the stopper 9 is arranged on the side of the cutter head 8 close to the cutting edge 18, and the middle part of the cutting edge 18 inclines downward. On the one hand, it avoids damage to the cutting edge 18 caused by the cutter head 8 touching the cutting ring groove 15 when the soil inlet channel 6 is opened. On the other hand, it can improve the cutting ability and ensure the screwing speed.

[0048] In an alternative embodiment, there are two soil inlet channels 6, and the two soil inlet channels 6 are symmetrically distributed with respect to the forming member 3. Correspondingly, the cutter 7 is strip-shaped, and a cutter head 8 corresponding to the soil inlet channel 6 is provided at each of its two ends, so as to match the double-cutter head 8 design to balance the force.

[0049] The forming member 3 is a lid-shaped structure with an upward opening. The outer wall of the forming member 3 is a conical surface extending to the cutting ring groove 15. Correspondingly, the outer side surface of the cutting ring groove 15 is a matching conical surface, so that under the downward pressure of the drill drive shaft 1, the soil is extruded outward through the conical surface to form a pouring groove, ensuring the compactness and stability of the inner wall of the pouring groove of the screw pile cap, reducing soil adhesion, and ensuring the quality of the formed pouring groove. A section of the cutter head 8 corresponding to the outer side of the cutting ring groove 15 is also a conical surface, and the outer wall extends to the upper edge of the forming member 3 through an inclined surface, so as to ensure the flatness of the inner wall of the pouring groove.

[0050] A plurality of soil outlet ports 16 are provided above the main body 2 and are circumferentially uniformly distributed thereabout. The soil outlet ports 16 can prevent the internal pressure of the main body 2 from causing poor soil inlet, and at the same time facilitate the observation and cleaning of the inner wall of the main body 2.

[0051] In an alternative embodiment, the hinge shaft of the forming member 3 extends horizontally and is tangent to the outer wall of the main body 2. Corresponding hinge plates or hinge rings protrude from the forming member 3 and the main body 2. The length of the hinge shaft is adapted to the thickness of the hinge plates or hinge rings of the two, so as to minimize the length extending outward during hinging and reduce the influence on forming. The direction and position of the hinge shaft are used to ensure the rotation direction of the forming member 3. A locking mechanism corresponding to the forming member 3 is provided on the other side of the main body 2 to ensure the stability of the forming member 3 through the locking mechanism.

[0052] Specifically, the locking mechanism includes a sheath 11, a hook 14, a locking member 13 and a hanging ring 10; the sheath 11 is arranged on the inner wall of the main body 2 and extends longitudinally upward to the upper end face of the main body 2 to form a closed space to protect the internal hook 14, hanging ring 10 and connecting rod 12 from damage caused by soil pushing. The middle of the hook 14 is hinged to the lower edge of the sheath 11. The hook 14 is a C-shaped hook. The hanging ring 10 is arranged on the forming member 3 and extends upward into the sheath 11 after the forming member 3 is buckled. In the closed state of the forming member 3, the hanging ring 10 is directly opposite to the hanging position at the lower end of the hook 14. The upper end of the hook 14 is hinged with a connecting rod 12 extending upward from the main body 2 to drive the hook 14 through the connecting rod 12. When the upper end of the hook 14 is driven upward, the lower end of the hook 14 is inserted into the hanging ring 10 to form a lock when the hook 14 rotates around the hinge shaft.

[0053] A locking member 13 that corresponds to the main body 2 and stops the main body 2 is threadedly assembled on the part of the connecting rod 12 extending upward from the main body 2. The locking member 13 can be a nut. The perforation of the main body 2 corresponding to the connecting rod 12 is slightly larger than the diameter of the connecting rod 12, so as to adapt to the angle change during the upward pulling of the connecting rod 12.

[0054] A multi-faceted sleeve 5 corresponding to the drill drive shaft 1 is provided in the middle of the main body 2, serving as a connection station. A multi-faceted section is provided below the drill drive shaft 1. After the multi-faceted section extends into the multi-faceted sleeve 5, it is fixed by a pin shaft. The pin shaft passes through the multi-faceted sleeve 5 and the drill drive shaft 1 radially, thereby achieving a detachable assembly.

[0055] In an alternative embodiment, the cutting ring groove 15 is integrally formed with the formed part 3. A plurality of rib plates are provided on the outer wall of the multi-faceted sleeve 5, thereby improving the structural strength of the multi-faceted sleeve 5. The angle of the fan surface corresponding to the soil inlet channel 6 is 25 - 35 degrees, and the optimal angle is 30 degrees. The main body 2 of the cutter head 8 is a fan surface adapted to the soil inlet channel 6 in the longitudinal projection.

[0056] One side of the blade body 18 away from the cutter head 8 is an inclined surface, which extends from the outside to the inside to the cutter head 8, thereby forming a triangular blade body 18, ensuring the cutting ability and reducing the force on the blade body 18 during the cutting process.

[0057] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are within the scope of the claims of the present invention pending approval.

Claims

1. A screw pile cap former, characterized in that: include: The main body is a cover-shaped structure adapted to the outer diameter of the screw pile cap, and a connection station corresponding to the drilling rig drive shaft is provided above the main body; A forming part, the forming part is a rotating body adapted to the main body, the forming part is connected to the lower edge of the main body in a hinged manner, and the main body is buckled or opened by longitudinal rotation; a cutting ring groove corresponding to the screw pile is provided below the forming part, and the cutting ring groove is provided with at least one notch as a soil entry channel; A cutter, the cutter is coaxially rotatably connected to the bottom of the molded part, the end of the cutter is provided with a cutter head slidably assembled along the cutting ring groove, and the cutter head is provided with a stopper corresponding to the soil feeding channel; In response to driving the forming member to rotate forward, the cutter head opens the soil entry passage, and the cutter head cuts the soil and allows the soil to enter the interior of the main body through the soil entry passage; In response to driving the forming member to rotate in the reverse direction, the cutter head closes the soil entry passage to seal the soil inside the main body.

2. The screw pile cap former according to claim 1, characterized in that: The cutter head is a gate-shaped structure corresponding to the cutting annular groove. A blade body is provided on one side of the cutter head corresponding to the positive direction, and the blade body is adapted to the bottom of the cutting annular groove.

3. The screw pile cap former according to claim 2, characterized in that: The stopper is a block or columnar structure, and a clamping station matched with the stopper is provided on the side of the cutting ring groove corresponding to the positive direction of the soil feeding channel.

4. The screw pile cap former according to claim 3, characterized in that: The stopper is arranged on a side of the cutter head close to the blade body, and the middle part of the blade body is inclined downward.

5. The screw pile cap former according to claim 1, characterized in that: There are two soil entry channels, and the two soil entry channels are symmetrically distributed about the molded part; Correspondingly, one cutter head is respectively provided at both ends of the cutter.

6. The screw pile cap former according to claim 1, characterized in that: The molded part is a cover-shaped structure with an opening facing upward, and the outer wall of the molded part is a tapered surface extending to the cutting ring groove.

7. The screw pile cap former according to claim 1, characterized in that: A plurality of earth-excavation openings evenly distributed in the circumferential direction of the main body are arranged above the main body.

8. The screw pile cap former according to claim 1, characterized in that: The molded part is hinged via a hinge shaft tangent to the outer wall of the main body, and a locking mechanism corresponding to the molded part is provided on the other side of the main body.

9. The screw pile cap former according to claim 8, characterized in that: The locking mechanism comprises a sheath, a hook, a locking piece and a hanging ring; The sheath is arranged on the inner wall of the main body, the middle part of the hook is hingedly connected to the lower edge of the sheath, and the hanging ring is arranged on the molded part and extends upward into the sheath after the molded part is buckled; The upper end of the hook is hinged with a connecting rod extending upward from the main body, so that the hook is driven by the connecting rod, and the portion of the connecting rod extending upward from the main body is threadedly assembled with the locking piece corresponding to the locking piece that blocks the main body.

10. The screw pile cap former according to claim 1, characterized in that: A polygonal sleeve corresponding to the drilling rig drive shaft is arranged in the middle of the main body, and the polygonal section below the drilling rig drive shaft extends into the polygonal sleeve and is fixed by a pin shaft.

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