Manufacturing equipment for prefabricated thorn pile
By using structures such as filler pipes and eccentric pipes in the precast spiked pile manufacturing equipment, the problem of gaps between the core pipe and the surrounding concrete was solved, achieving a firm bond between the core pipe and the pile concrete, thus improving the quality and bearing capacity of the pile.
Patent Information
- Application Number
- CN202520082735.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-14
AI Technical Summary
In the existing technology for manufacturing pneumatic spiked piles, the gap between the core tube and the surrounding concrete is large, resulting in weak bonding and affecting the quality and bearing capacity of the pile.
A precast spiked pile manufacturing equipment is used. By rotating a cylindrical template on a centrifuge, fine stone concrete is pumped to the area around the core tube using a filler pipe, a central tube, and an eccentric tube. This ensures the gap between the concrete around the core tube and the concrete of the pile body, and ensures that the core tube is firmly and tightly bonded to the pile body concrete.
This improves the bonding effect between the core tube and the pile concrete, ensures the quality and bearing capacity of the pile, avoids deformation and damage of the core tube under load, and enhances the reliability and efficiency of construction.
Smart Images
Figure CN223749911U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pile foundation construction technical field, specifically is a kind of prefabricated manufacturing equipment of barbed pile. BACKGROUND
[0002] In recent years, with the development of economy and the progress of construction technology, in order to improve the bearing capacity and anti-settlement level of pile foundation, some pile foundation construction schemes about pile side into barbed pile have appeared in the industry.
[0003] And the applicant also proposed a technical scheme about pneumatic barbed pile in 2022, see patent number 2022112109724 and 2022226337026;The pile body of the pneumatic barbed pile is provided with an axial center hole and a plurality of radial holes, a core pipe is arranged in the center hole, and a basic sleeve pipe is arranged in each radial hole, the core pipe is sealingly welded with all the basic sleeve pipes, an outer sleeve pipe, an inner sleeve pipe and a barbed root that are overlapped with each other form an outer expansion assembly, and the outer sleeve pipe of each outer expansion assembly is screwed into the corresponding basic sleeve pipe.In construction, the pile body is pressed into the soil to the bottom elevation, and then the air compressor is started to supply gas to the core pipe and each outer expansion assembly, so that the barbed root and the inner sleeve pipe of each outer expansion assembly pierce into the soil body on the side of the pile, and are outwardly convex to form a barb to increase the resistance on the side of the pile.
[0004] The technical scheme of the above-mentioned pneumatic barbed pile has a series of advantages such as large expansion amplitude, strong force, good resistance gain effect on the side of the pile, convenient construction, no dilution of soil, good durability, etc.But in more than two years of actual production application, it is found that the above-mentioned pneumatic barbed pile still has deficiencies and room for improvement in the production and manufacturing process.
[0005] The process of manufacturing the pneumatic barbed pile in the prior art can be understood as incorporating the process of installing the core pipe and the basic sleeve pipe into the manufacturing process of the traditional PHC pipe pile, and the specific steps are as follows.The basic sleeve pipes are sealingly welded on the core pipe to form an integral pipe assembly;Wrap the steel cage around the pipe assembly, and wrap the pipe assembly in the middle;The two ends of the longitudinal main reinforcement of the steel cage are connected with the two chucks, and the two chucks are connected with the two end plates by screws, and the front end of the core pipe is welded with the front chuck;Put the steel cage and the pipe assembly into the lower half of the mold, and the front end of the lower half of the mold is provided with an anchor, and the anchor includes a fixed plate, a tensioning plate and a screw;The end plate of the fixed end of the steel cage is clamped to the rear opening of the lower half of the mold, and the end plate of the tensioning end of the steel cage is fixed with the tensioning plate of the anchor;Pour in the concrete, and screw and buckle the upper half of the mold with the lower half of the mold, and rotate the screw to drive the anchor to tension, to provide prestress for the main reinforcement of the steel cage;Put the pile body and the buckled mold on the centrifuge to rotate, then maintain, and after the concrete is dry, loosen the anchor, remove the upper and lower half of the mold, and remove the end plates and bolts at both ends of the pile body;Then install each outer expansion assembly on the demolded pile body, i.e.screw the outer sleeve pipe of each outer expansion assembly into the corresponding basic sleeve pipe, to complete the manufacturing of the pneumatic barbed pile.
[0006] The problem of the manufacturing scheme occurs in the centrifugal stage, the concrete in the template is continuously centrifuged out, the concrete at the part close to the template at the outer edge of the pile body is continuously packed and compacted, but the concrete at the center of the pile body is continuously lost with the centrifugal process, gaps appear between the core pipe at the center of the pile body and the surrounding concrete, and even the gaps become larger and larger with the centrifugal process, which leads to poor bonding and anchoring effect of the core pipe and the concrete of the pile body, and finally affects the overall quality and bearing capacity of the pile body; even, due to the non-compactness of the core pipe and the surrounding area, the core pipe deforms and damages under the action of load, and the air tightness fails during static pressure and hammering, which affects the core function of the air pressure. Practical new type content
[0007] The technical problem to be solved by the utility model is to provide a manufacturing equipment of the prefabricated pile which can eliminate the gap between the core pipe and the surrounding concrete and make the core pipe and the pile body concrete firmly and densely bonded and anchored.
[0008] A technical solution of the utility model is to provide a manufacturing equipment of the prefabricated pile, which comprises a cylindrical template formed by screwing and buckling two half templates and a centrifugal machine, and the cylindrical template is placed on the centrifugal machine; the reinforcement cage of the pile body is wrapped with a pipe assembly, and the pipe assembly is formed by sealing and connecting the core pipe and the base sleeve; the two ends of each longitudinal main reinforcement of the reinforcement cage are respectively connected with the front and rear chucks, and the front and rear chucks are respectively connected with the front and rear end plates; the front end of the core pipe is sealingly connected with the front chuck; the front end of the cylindrical template is provided with an anchor device, the reinforcement cage is located in the cylindrical template, the rear end plate of the reinforcement cage is clamped on the rear opening of the cylindrical template, and the front end plate of the reinforcement cage is fixed with the anchor device tensioning plate; the manufacturing equipment further comprises a stationary concrete supplementing pipe and a transition hard pipe rotating with the cylindrical template, the concrete supplementing pipe is connected with a concrete supplementing pump, the outlet of the concrete supplementing pipe is connected with the transition hard pipe through a turning sealing joint; the transition hard pipe comprises an outer shaft pipe and an inner eccentric pipe for supplementing concrete to the surrounding area of the core pipe; the eccentric pipe is connected with one end of the cylindrical template, and the other end of the cylindrical template is provided with a pressure relief device.
[0009] Compared with the prior art, the manufacturing equipment with the above structure has the following advantages.
[0010] When the pile body and the cylindrical mold rotate and centrifuge on the centrifugal machine, the device can pump the fine stone concrete into the inner cavity of the mold through the concrete supplement pipe, the shaft pipe and the eccentric pipe, and to the peripheral area of the core pipe, and the maximum particle size of the fine stone concrete is not more than 15 mm, which is supplemented from one end of the cylindrical mold, diffuses along the axial direction of the core pipe along the peripheral gap under the pump pressure, and fills the peripheral area of the core pipe of the pile body, and is relieved by the relief device at the other end of the cylindrical mold to prevent the internal pressure of the cylindrical mold from being too large. The device solves the drawbacks of the hollow interior of the pile body concrete caused by centrifugation in the prior art, improves the bonding and anchoring effect of the core pipe and the pile body concrete, makes it firm and dense, and further ensures the overall quality, bearing capacity and anti-settlement level of the prefabricated pile. Moreover, the turning sealing joint makes the front section of the concrete supplement pipe static and the rear section of the concrete supplement pipe rotate synchronously with the mold, avoiding the winding and leakage of the concrete supplement pipe with the centrifugal mold.
[0011] The most preferred eccentric pipe and relief device are that the eccentric pipe is an n-shaped pipe, the radial pipe section of the rear section of the n-shaped pipe is provided with a threaded plate, the front end of the upper half of the mold side wall protrudes from the part of the centrifugal machine, and the protruding mounting seat is provided with a radial butt joint hole, the threaded plate is screwed with the mounting seat, the end of the radial pipe section is sealingly inserted into the upper opening of the butt joint hole, a radial embedded pipe is sealingly inserted into the lower opening of the butt joint hole, the end of the embedded pipe abuts against the core pipe, and the pipe wall of the end of the embedded pipe is provided with a front nozzle for supplementing concrete to the peripheral area of the core pipe; the relief device is a concrete discharge pipe for discharging the excess fine stone concrete in the peripheral area of the core pipe, and the concrete discharge pipe penetrates the rear chuck and the rear end plate in sequence.
[0012] The working process of the above structure is that when the pile body and the cylindrical mold centrifuge, the device can pump the fine stone concrete into the inner cavity of the mold through the concrete supplement pipe, the shaft pipe, the n-shaped pipe and the butt joint hole of the upper half of the mold, and then through the embedded pipe to the peripheral area of the core pipe in the pile body, and the fine stone concrete is supplemented from the front end of the cylindrical mold, diffuses along the axial direction of the core pipe along the peripheral gap under the pump pressure, reaches the rear end of the cylindrical mold and overflows from the concrete discharge pipe, and if the worker observes that the concrete discharge pipe has stable overflow of fine stone concrete for more than 2 minutes, it is judged that the concrete supplement is successful.
[0013] The preferred structure has the following advantages. The n-shaped pipe design avoids the anchorage device at the front end of the cylindrical template, and realizes radial concrete feeding on the side of the template, which avoids a series of problems such as mutual interference, assembly difficulty, complex structure, even concrete leakage and the like, caused by axial concrete feeding through the anchorage device at the front end of the template, the fixed plate, tensioning plate, screw rod of the anchorage device and the front end plate and front chuck of the template, and simplifies the structure. Moreover, the embedded pipe in the pile body forms a concrete feeding channel inside the pile body, so that the fine stone concrete directly reaches the core pipe radially, and the fine stone concrete can overcome the centrifugal force and smoothly reach the inside of the pile body through pump pressure, thereby ensuring the concrete feeding effect; after concrete feeding, only the n-shaped pipe and the screw plate need to be removed, and the internal pipe, i.e. the embedded pipe, is cut off and remains in the pile body, so that the disassembly process is simple and does not affect the strength of the pile body. In addition, the structure is easy to assemble, the upper opening of the embedded pipe is inserted into the butt joint hole, and when the upper half of the template is lowered, the embedded pipe is automatically abutted with the core pipe, and the upper end of the embedded pipe is automatically and firmly inserted into the butt joint hole; when the screw plate of the n-shaped pipe is installed with the installation seat of the upper half of the template, the end of the radial pipe segment of the n-shaped pipe is simultaneously inserted into the butt joint hole, thereby realizing the connection of the external pipe and the internal pipe of the pile body. Furthermore, the concrete feeding pipe of the preferred structure is complete and reliable in connection, has good sealing and pressure bearing properties, and is convenient for workers to increase the pump pressure for concrete feeding, such as using high-pressure concrete feeding of 3.5-4 MPa, thereby accelerating the concrete feeding speed and improving the concrete feeding effect. In addition, the structure only needs to observe that the concrete discharging pipe has concrete overflow and is stable for a period of time, so as to determine that the concrete feeding effect meets the standard, and the judgment process is clear, explicit and intuitive.
[0014] The preferred eccentric pipe and pressure relief device are as follows. The eccentric pipe is an L-shaped pipe, the vertical segment of the L-shaped pipe is connected with the outlet of the shaft pipe, and the horizontal pipe penetrates the rear end plate and the rear chuck, and the end segment of the horizontal pipe is provided with a rear nozzle for feeding concrete to the peripheral area of the core pipe; the pressure relief device includes four pressure relief holes arranged in the front chuck, the front end plate, the anchorage tensioning plate and the anchorage fixed plate in sequence, the front end plate is further covered with a waterproof and breathable membrane, the front end plate includes a plurality of bolts for screwing the front chuck, and the bolts fix the waterproof and breathable membrane on the front end plate; the L-shaped pipe is provided with a pressure sensor, and the pressure sensor and the concrete feeding pump are connected with a main controller.
[0015] The working process of the preferred structure is that the fine stone concrete directly penetrates the rear end plate and the rear chuck in the axial direction through the L-shaped pipe, enters the inner cavity of the cylindrical formwork from the rear end, reaches the peripheral area of the core pipe, and spreads forward along the peripheral gap of the core pipe in the axial direction, and finally reaches the front end of the cylindrical formwork; and the excess gas in the inner cavity of the formwork is discharged through the four pressure relief holes at the front end of the formwork in sequence; and in order to prevent the excess fine stone concrete from being discharged from the pressure relief hole and polluting the anchorage device, the front end plate is covered with a water-stopping and air-permeable film, so that the fine stone concrete is maintained in the inner cavity of the formwork and the excess gas is discharged. Of course, the water-stopping and air-permeable film has a limited pressure bearing capacity, and the super-high-grade air-permeable film with a pressure bearing capacity of 1 MPa is selected in the present application. In order to prevent the air-permeable film at the front end of the formwork from being broken and the concrete from leaking, the pressure of the supplementary concrete at the rear end of the formwork should not be too large, and the low-pressure supplementary concrete with a pressure of 1.5-2 MPa is generally used. When the fine stone concrete is filled to the position and fills the peripheral gap of the core pipe, the pressure at the inlet, that is, the pressure of the L-shaped pipe, will rise to an alarm value such as 3-4 MPa, which will trigger the main controller to reduce the output power of the supplementary concrete pump, such as to 0.8 MPa, and maintain for 2 minutes and then stop the supplementary concrete pump, so as to ensure that the supplementary concrete is fully compacted.
[0016] From the above analysis, it can be known that the preferred structure can also achieve the technical effect of filling the gap between the core pipe and the peripheral concrete, so that the core pipe and the pile body concrete are firmly and compactly bonded and anchored.
[0017] The preferred turning sealing joint comprises a static shell, an outer threaded joint is arranged at the front end of the shell, the outer threaded joint is screwed with the outlet of the supplementary concrete pipe, the central hole of the outer threaded joint is communicated with the inner cavity of the shell through a tapered valve surface, a convex ring is arranged at the front end of the shaft core pipe, a compression spring and a hexagonal joint are sleeved on the shaft core pipe, the convex ring and the compression spring are located in the inner cavity of the shell, the outer threaded pipe of the hexagonal joint is screwed with the inner thread of the rear port of the inner cavity of the shell, and the outer threaded pipe pushes the convex ring forward through the compression spring, so that the front end of the shaft core pipe abuts against and seals the tapered valve surface. The joint can continuously provide dynamic compensation for the convex ring and the shaft core pipe, so that the end of the shaft core pipe continuously abuts against and seals the tapered valve surface, thereby realizing the sealing butt joint of the static supplementary concrete pipe and the rotating transition hard pipe, and the joint is firm and reliable and does not leak concrete.
[0018] As preferred, the device further comprises a triangular bracket, two lower sleeves are fixed on the bracket, each lower sleeve is screwed with an upper sleeve, a set of upper and lower sleeves are sleeved between the shell of the turning sealing joint, and the supplementary concrete pipe is sleeved between another set of upper and lower sleeves; in this way, the end of the supplementary concrete pipe is stably supported and centrally kept at the axial position of the cylindrical formwork, so as to ensure that the subsequent transition hard pipe stably rotates with the cylindrical formwork and reduces shaking. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 FIG. 1 is a structural schematic view of a prefabricated pile manufacturing device embodiment 1 of the present application.
[0020] Figure 2 FIG. 2 is a structural schematic view of the prefabricated pile manufacturing device after being turned by a certain angle. Figure 1 FIG. 3 is a structural schematic view of the prefabricated pile manufacturing device after being turned by a certain angle.
[0021] Figure 3 Is the structure schematic diagram of the half section of the cylindrical template, the concrete supplementing pipe, the turning sealing joint, the transition hard pipe and the like structure of the prefabricated pile manufacturing equipment embodiment 1 of the utility model.
[0022] Figure 4 Is Figure 3 The structure schematic diagram after deflecting a certain angle.
[0023] Figure 5 Is Figure 4 The structure schematic diagram after deflecting a certain angle.
[0024] Figure 6 Is Figure 4 The enlarged schematic diagram of the A part in the middle.
[0025] Figure 7 Is the schematic diagram after the n-shaped pipe is detached from the upper half template mounting seat.
[0026] Figure 8 Is the local enlarged schematic diagram after the front end plate is detached from the reinforcement cage (for the convenience of expression, the state before the rivet head is pulled and clamped into the convex hole clamping opening is shown, and the rivet head is flush with the front ring surface of the front chuck after anchoring).
[0027] Figure 9 Is Figure 8 The structure schematic diagram after deflecting a certain angle.
[0028] Figure 10 Is the structure schematic diagram of the prefabricated pile manufacturing equipment embodiment 2 of the utility model.
[0029] Figure 11 Is Figure 10 The structure schematic diagram after the upper half template is removed.
[0030] Figure 12 Is Figure 11 The structure schematic diagram after the anchorage device is removed.
[0031] Figure 13 Is the exploded schematic diagram of the front end of the reinforcement cage of the embodiment 2.
[0032] 1, centrifuge, 2, reinforcement cage, 2.1, main reinforcement, 3, core pipe, 3.1, necking pipe, 4, base sleeve, 5, front chuck, 6, rear end plate, 7, front end plate, 8, anchor, 8.1, tensioning plate, 8.2, fixing plate, 9, steering seal joint, 9.1, shell, 9.2, external thread joint, 9.3, conical valve surface, 10, concrete supplementing pipe, 11, shaft core pipe, 11.1, convex ring, 12, n-shaped pipe, 12.1, radial pipe section, 13, screwing plate, 14, upper half-width formwork, 15, mounting seat, 16, butt joint hole, 17, pre-buried pipe, 18, arc-shaped abutting plate, 19, front nozzle, 20, rear chuck, 21, concrete discharging pipe, 22, compression spring, 23, hexagonal joint, 23.1, external thread pipe, 24, triangular bracket, 25, lower sleeve, 26, upper sleeve, 27, front top ring, 28, rear top ring, 29, rivet head, 30, convex hole, 31, L-shaped pipe, 32, rear nozzle, 33, pressure relief hole, 34, water-stop air-permeable membrane. DETAILED DESCRIPTION
[0033] The utility model will be further explained in connection with the drawings and specific embodiments.
[0034] As Figures 1 to 9 shown, the embodiment 1 of the prefabricated pile manufacturing equipment of the utility model, it includes by two half-width formwork buckling screwing into the cylindrical formwork and centrifuge 1, the cylindrical formwork rests on centrifuge 1.From common sense, the cylindrical formwork is longer than centrifuge 1, so the front and rear ends of the cylindrical formwork are convex to centrifuge 1.
[0035] The reinforcement cage 2 of the pile body is wrapped with a pipe assembly, and the pipe assembly is sealed and connected by the core pipe 3 and each layer of base sleeve 4, such as welding or screwing, and in this embodiment, there are four base sleeves 4 in each layer.
[0036] The two ends of each longitudinal main reinforcement 2.1 of the reinforcement cage 2 are respectively clamped with the front and rear chucks, and the front and rear chucks are screwed with the front and rear end plates, specifically, each main reinforcement 2.1 of the reinforcement cage 2 is provided with a rivet head 29 at each end, each chuck is provided with a convex hole 30 corresponding to each main reinforcement 2.1, and the convex hole 30 includes a circular hole part and a bayonet part that are connected to each other; each end plate is provided with a through hole corresponding to the circular hole part of the chuck convex hole 30, and a bolt is arranged in each through hole; the end of each main reinforcement 2.1 of the reinforcement cage 2 passes through the circular hole part of the corresponding convex hole 30 and the rivet head 29 at the end of the main reinforcement 2.1 is clamped into the corresponding bayonet part; then each bolt of the end plate is screwed into the circular hole part of the corresponding convex hole 30, thereby realizing the connection and fixation of the reinforcement cage 2, the chucks on both sides and the end plates.
[0037] The front end of the core pipe 3 is sealingly connected with the front chuck 5, and in this embodiment, the connection is by welding; that is, the necked pipe 3.1 at the front end of the core pipe 3 extends into the central hole of the front chuck 5, and the necked pipe 3.1 is sealingly welded with the hole wall of the central hole, so as to realize the axial positioning of the core pipe 3 in the reinforcement cage 2 and the pile body.
[0038] The front end of the cylindrical formwork is provided with an anchorage device 8, and the reinforcement cage 2 and the pipe assembly are located in the cylindrical formwork, and the rear end plate 6 of the reinforcement cage 2 is clamped to the rear opening of the cylindrical formwork, and the front end plate 7 of the reinforcement cage 2 is fixed with the tensioning plate 8.1 of the anchorage device 8.
[0039] In this embodiment, the outer edge of each foundation sleeve 4 abuts against the inner ring surface of the cylindrical formwork, and a rubber plug can be inserted into the pipe opening of the foundation sleeve 4, so as to prevent the concrete from entering the foundation sleeve 4 during pouring. After the pouring and formwork removal, the plug is pulled out, and the pipe opening of each foundation sleeve 4 is exposed on the side surface of the pile body. The foundation sleeve 4 is provided with an internal thread, and the worker can then completely screw the outer sleeve of each expansion assembly into the foundation sleeve 4. Of course, each foundation sleeve 4 can not abut against the inner ring surface of the formwork, but the outer sleeve of the expansion assembly can be screwed into the corresponding foundation sleeve 4 before pouring. This is equivalent to pre-burying the expansion assembly in the pile body, and the outer end of the expansion assembly abuts against the inner ring surface of the cylindrical formwork. Only the outer opening of the outer sleeve needs to be protected by a plug before pouring to prevent the concrete from entering the outer opening of the outer sleeve during pouring.
[0040] The manufacturing equipment also includes a stationary concrete supplementing pipe 10 and a transition hard pipe rotating with the cylindrical formwork. As known in the art, the concrete supplementing pipe 10 is provided with a concrete supplementing pump, and the inlet of the concrete supplementing pipe 10 is in communication with a fine stone concrete pool; the outlet of the concrete supplementing pipe 10 is in communication with the transition hard pipe through a turning sealing joint 9. The transition hard pipe includes an outer shaft pipe and an inner eccentric pipe for supplementing concrete to the peripheral area of the core pipe; the eccentric pipe is in communication with one end of the cylindrical formwork, and the other end of the cylindrical formwork is provided with a pressure relief device.
[0041] The shaft tube 11 of the embodiment is in front and the eccentric tube is in back, the eccentric tube is an n-shaped tube 12 for avoiding the anchor 8, the radial tube section 12.1 of the back section of the n-shaped tube 12 is provided with a screw plate 13, the front of the side wall of the upper half formwork 14 is provided with an upper convex mounting seat 15, the mounting seat 15 is penetrated by a radial butt joint hole 16, the screw plate 13 is screwed with the mounting seat 15 and the end of the radial tube section 12.1 is sealingly inserted into the upper opening of the butt joint hole 16. A radial embedded tube 17 is sealingly inserted into the lower opening of the butt joint hole 16, the inner end of the embedded tube 17 is fixed with an arc-shaped abutting plate 18, the arc-shaped abutting plate 18 abuts against the core tube 3, and the end of the embedded tube 17 is provided with an axial front nozzle 19 for supplementing the concrete to the peripheral area of the core tube 3. The pressure relief device of the embodiment is an axial concrete discharge pipe 21 for discharging the excess fine stone concrete in the peripheral area of the core tube, the concrete discharge pipe 21 penetrates the rear chuck 20 and the rear end plate 6 in sequence, the inlet of the concrete discharge pipe 21 is flush with the front annular surface of the rear chuck 20, and the inlet of the concrete discharge pipe 21 is located in the peripheral area of the core tube 3, for example, the radial distance between the inlet of the concrete discharge pipe 21 and the core tube 3 is not more than 15 mm.
[0042] The steering sealing joint 9 of the application preferably comprises a static shell 9.1, the front end of the shell 9.1 is provided with an external threaded joint 9.2, the external threaded joint 9.2 is screwed with the outlet of the concrete supplementing pipe 10; the central hole of the external threaded joint 9.2 is communicated with the inner cavity of the shell 9.1 through a tapered valve surface 9.3, the front end of the shaft tube 11 is provided with a convex ring 11.1, the shaft tube 11 is sleeved with a compression spring 22 and a hexagonal joint 23, the convex ring 11.1 and the compression spring 22 are located in the inner cavity of the shell 9.1, the external threaded pipe 23.1 of the hexagonal joint 23 is screwed with the internal threads of the rear opening of the inner cavity of the shell 9.1, and the external threaded pipe 23.1 pushes the convex ring 11.1 forward through the compression spring 22 so that the front end of the shaft tube 11 abuts against and seals the tapered valve surface 9.3. More specifically, the front and rear ends of the compression spring 22 are respectively fixed with a front top ring 27 and a rear top ring 28, the two top rings are also sleeved on the shaft tube 11, and the external threaded pipe 23.1, the front top ring 27, the compression spring 22, the rear top ring 28, the convex ring 11.1 and the tapered valve surface 9.3 abut in sequence.
[0043] The manufacturing equipment also comprises a triangular bracket 24, the bracket is fixed with front and rear lower sleeves 25, each lower sleeve 25 is screwed with an upper sleeve 26, the shell 9.1 of the steering sealing joint 9 is sleeved between a group of upper and lower sleeves on the rear side, and the concrete supplementing pipe 10 is sleeved between a group of upper and lower sleeves on the front side.
[0044] As Figures 10 to 13As shown, the embodiment 2 of the prefabricated pile manufacturing equipment of the utility model, which is different from the embodiment 1, is as follows. The eccentric tube of this embodiment is an L-shaped tube 31, the vertical section of the L-shaped tube 31 is communicated with the outlet of the shaft tube 11, and the horizontal tube penetrates the rear end plate 6 and the rear chuck 20, the horizontal tube tail section is provided with a rear nozzle 32 for supplementing the concrete to the peripheral area of the core tube 3, and the rear nozzle 32 is close to the core tube 3, and the radial distance between the rear nozzle 32 and the core tube 3 is not more than 15 mm.
[0045] The pressure relief device of this embodiment comprises four pressure relief holes 33 arranged in the front chuck 5, the front end plate 7, the anchor 8 tension plate 8.1 and the anchor 8 fixed plate 8.2 in sequence. The gas in the inner cavity of the cylindrical formwork is sequentially relieved through the four pressure relief holes 33 of the front chuck 5, the front end plate 7, the anchor 8 tension plate 8.1 and the anchor 8 fixed plate 8.2. In order to avoid the leakage of the fine stone concrete, the front end plate 7 is further covered with a water-stop air-permeable film 34, and the front end plate 7 itself is provided with a plurality of bolts for screwing with the round hole part of the convex hole 30 of the front chuck 5, so that the water-stop air-permeable film 34 is fixed on the front end plate 7 by using the bolts. Of course, the water-stop air-permeable film 34 of the embodiment has a service life, and a new water-stop air-permeable film 34 can be replaced after the expiration.
[0046] The L-shaped tube 31 is provided with a pressure sensor, and the pressure sensor and the concrete supplementing pump are connected with the main controller. The main controller can adopt a simple single-chip microcomputer.
[0047] Overall, the embodiment 2 is reversed, that is, the concrete is supplemented from the rear end of the cylindrical formwork, so the anchor 8 at the front end of the cylindrical formwork is bypassed, and therefore the concrete supplementing pipeline structure is relatively simple; but in order to avoid crushing the water-stop air-permeable film 34, only a relatively low concrete supplementing pressure can be adopted, the concrete supplementing speed is relatively slow, and the concrete supplementing effect can only be indirectly judged according to the pressure sensor, which is not as intuitive and easy to operate as the embodiment 1, but the embodiment 2 can also realize the function of supplementing the concrete to the periphery of the core tube 3, and the defects do not cover up the merits, so it still has application prospects and value, and also belongs to the protection range of the application.
Claims
1. A manufacturing device for precast spiked piles, comprising a cylindrical template formed by screwing together upper and lower half-width templates and a centrifuge, the cylindrical template resting on the centrifuge; a reinforcing cage of the spiked pile body centrally enclosing a pipe assembly, the pipe assembly being formed by a core tube and various foundation sleeves sealed together; each longitudinal main bar of the reinforcing cage having its ends respectively engaged with two front and rear clamps, and the two front and rear clamps being screwed together with two front and rear end plates respectively, the front end of the core tube being sealed to the front clamp; an anchor is provided at the front end of the cylindrical template, the reinforcing cage is located inside the cylindrical template, the rear end plate of the reinforcing cage is engaged with the rear opening of the cylindrical template, and the front end plate of the reinforcing cage is fixed to the anchor tension plate; characterized in that: The manufacturing equipment further comprises a stationary concrete supplementing pipe and a transition hard pipe rotating with the cylindrical formwork, the concrete supplementing pipe is communicated with a concrete supplementing pump, and the outlet of the concrete supplementing pipe is communicated with the transition hard pipe through a turning sealing joint; the transition hard pipe comprises an outer shaft pipe and an inner eccentric pipe for supplementing concrete to the peripheral area of the core pipe; the eccentric pipe is communicated with one end of the cylindrical formwork, and the other end of the cylindrical formwork is provided with a pressure relief device.
2. The manufacturing apparatus of precast piles according to claim 1, characterized in that: The eccentric pipe is an n-shaped pipe, the radial pipe section of the rear section of the n-shaped pipe is provided with a screw plate, the front end of the upper half template sidewall protrudes from the position of the centrifugal machine, and an upper protruding mounting seat is arranged at the position, the mounting seat is penetrated by a radial butt joint hole, the screw plate is screwed with the mounting seat, the end of the radial pipe section is sealingly inserted into the upper opening of the butt joint hole, a radial embedded pipe is sealingly inserted into the lower opening of the butt joint hole, the end of the embedded pipe abuts against the core pipe, and a front nozzle for supplementing concrete to the peripheral area of the core pipe is arranged on the pipe wall of the end of the embedded pipe; the pressure relief device is a concrete discharging pipe for discharging excess fine aggregate concrete in the peripheral area of the core pipe, and the concrete discharging pipe penetrates the rear chuck and the rear end plate in sequence.
3. The manufacturing apparatus of precast piles according to claim 1, characterized in that: The eccentric pipe is an L-shaped pipe, the vertical section of the L-shaped pipe is communicated with the outlet of the shaft pipe, and the horizontal pipe penetrates the rear end plate and the rear chuck, and the end section of the horizontal pipe is provided with a rear nozzle for supplementing concrete to the peripheral area of the core pipe; the pressure relief device comprises four pressure relief holes arranged in the front chuck, the front end plate, the anchor tensioning plate and the anchor fixing plate in sequence, the front end plate is further covered with a waterproof air permeable film, the front end plate comprises a plurality of bolts for screwing the front chuck, and the bolts fix the waterproof air permeable film on the front end plate; the L-shaped pipe is provided with a pressure sensor, and the pressure sensor and the concrete supplementing pump are connected with a main controller.
4. The manufacturing apparatus of precast piles according to claim 1, characterized in that: The turning sealing joint comprises a stationary shell, an outer threaded joint is arranged at the front end of the shell, and the outer threaded joint is screwed with the outlet of the concrete supplementing pipe; the central hole of the outer threaded joint is communicated with the inner cavity of the shell through a tapered valve surface, a convex ring is arranged at the front end of the shaft pipe, a compression spring and a hexagonal joint are sleeved on the shaft pipe, the convex ring and the compression spring are located in the inner cavity of the shell, the outer threaded pipe of the hexagonal joint is screwed with the inner threads of the rear opening of the inner cavity of the shell, and the outer threaded pipe pushes the convex ring through the compression spring so that the front end of the shaft pipe abuts against and seals the tapered valve surface.
5. The manufacturing apparatus of preformed stakes according to claim 4, characterized in that: The turning sealing joint further comprises a triangular bracket, two lower sleeves are fixed on the bracket, each lower sleeve is screwed with an upper sleeve, a group of upper and lower sleeves are sleeved between the shell of the turning sealing joint, and the concrete supplementing pipe is sleeved between the other group of upper and lower sleeves.