A type of mold-closing bolt, disassembly and assembly tool and pipe pile mold

Abstract

This invention provides a mold-closing bolt, a disassembly and assembly tool, and a pipe pile mold, including a base, an intermediate nut, a nut seat, a lower nut, and bolts. The base has a communicating groove and a through hole. The groove is used to install the intermediate nut on the base and restrict its rotation. The opening of the nut seat is used to install the lower nut on the nut seat and restrict its rotation. The bolt passes through the through hole and is threadedly connected to the intermediate nut and / or the lower nut. The sleeve of the disassembly and assembly tool has a claw portion that mates with the bolt head of the mold-closing bolt. The pipe pile mold has several mold-closing bolts. The mold-closing bolt has fewer parts, a simplified structure, is easy to manufacture, and has a low overall cost. It is easy to disassemble and assemble, has a long service life, and can be replaced online. The parts are fully exposed for easy maintenance. The bolt head and the disassembly and assembly tool are optimized for better tolerance, which can significantly improve the success rate and efficiency of automatic disassembly and assembly of the mold-closing bolt and the pipe pile mold. The pipe pile mold is easy to open and close, has fewer failure points, and a high safety factor.

Description

Technical Field

[0001] This invention belongs to the field of pipe pile mold assembly technology, specifically relating to a mold assembly bolt, disassembly and assembly tools, and pipe pile mold. Background Technology

[0002] Prestressed concrete pipe piles are mainly used for low-cap pile foundations in industrial and civil buildings, and are widely used in the foundations of railways, highways and bridges, municipal works, and large equipment projects. They are characterized by high strength, strong bearing capacity, and strong adaptability to geological structures. The general method for manufacturing prestressed concrete pipe piles is as follows: the reinforcing cage is inserted into the upper and lower halves of the pipe pile mold, and the two halves of the pipe pile mold are tightened with mold-closing bolts, forming a closed cavity. Concrete is poured into the pipe pile mold, and after centrifugation and steam curing, the mold-closing bolts are loosened, the pipe pile mold is opened, and the formed concrete product can be removed.

[0003] Concrete pile molds are generally long cylindrical or square-section cylindrical shapes. Hundreds of bolt pairs are arranged along both sides of the mold. The upper and lower pipe pile molds are locked by tightening the bolt pairs with a pneumatic wrench. When opening, the bolt pairs are loosened with a pneumatic wrench to separate the upper and lower pipe pile molds.

[0004] Currently, the commonly used mold closing bolts are ordinary hinge bolt pairs or spring bolt pairs, which have the following problems: (1) When tightening hinge bolt pairs, the bolts need to be manually flipped to the upper cover mold before they can be locked with a pneumatic wrench, which is labor-intensive; (2) Spring bolts are installed on the upper cover mold. When closing the mold, the pneumatic wrench presses the screw into the nut of the lower mold to achieve tightening. However, the spring and its accessories are rotated left and right by the screw during the compression process, which is easy to deform and damage, reducing the safety factor. Its structure is extremely difficult to disassemble and assemble, and cannot be replaced online. The pipe pile mold needs to be hoisted offline for replacement by specialized workers, which is time-consuming and labor-intensive; (3) The parts are enclosed and it is difficult to detect damaged parts in time, making maintenance inconvenient; (4) The bolt head has the same size at both ends. When using disassembly and assembly tools such as pneumatic wrenches, it is necessary to strictly align with the bolt pair for tightening and loosening. It is inconvenient to disassemble, affecting the success rate and efficiency of disassembly and assembly; (5) When designing other structures of mold closing bolts that can be applied to pipe pile molds, it is necessary to make additional improvements to the pipe pile mold structure, resulting in a high overall cost. Summary of the Invention

[0005] The present invention aims to solve at least one of the above-mentioned technical problems, and provides a mold clamping bolt, disassembly and assembly tool and pipe pile mold.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A mold clamping bolt includes a base, an intermediate nut, a nut seat, a lower nut, and a bolt. The base has a communicating groove and a through hole. The groove is used to install the intermediate nut on the base and to restrict the rotation of the intermediate nut. The nut seat has an opening for installing the lower nut on the nut seat and to restrict the rotation of the lower nut.

[0008] Preferably, the groove of the aforementioned mold clamping bolt is in a limiting fit with the top or bottom of the intermediate nut, and the groove and the intermediate nut include at least one first mating surface that restricts the rotation of the intermediate nut, with the intermediate nut placed in the groove.

[0009] Preferably, in the above-mentioned mold clamping bolt, the lower nut includes a first boss, the opening is limited to the bottom of the first boss, the opening and the lower nut include at least one second mating surface that restricts the rotation of the lower nut, the nut seat is provided with a pin hole, and a cotter pin is provided in the pin hole.

[0010] Preferably, a flat washer is provided between the above-mentioned mold clamping bolt and the base.

[0011] Preferably, the aforementioned mold clamping bolt includes a first threaded section, a second threaded section, and a smooth section located between the first threaded section and the second threaded section. The length of the smooth section is greater than the height of the threaded hole of the intermediate nut, and the diameter of the smooth section is smaller than the minor diameter of the first threaded section and the second threaded section. When the bolt is tightened, the first threaded section is threadedly engaged with the intermediate nut, and the second threaded section is threadedly engaged with the lower nut.

[0012] Preferably, the aforementioned mold-closing bolt includes a bolt body and a bolt head, wherein the head end dimension of the bolt head is smaller than the dimension of the end where the bolt head connects to the bolt body.

[0013] Preferably, the bolt body and the bolt head are connected as one piece or separately, and the bolt head is provided with at least two claws, with a groove formed between adjacent claws.

[0014] Preferably, the top of the slot is provided with a slope, and the bolt body extends to the end above the bolt head or the top of the bolt head has a conical structure.

[0015] A disassembly and assembly tool includes a sleeve having a claw portion that engages with the bolt head of the mold clamping bolt as described in any of the above claims.

[0016] Preferably, the claw portion engages with the bolt head wall or a slot.

[0017] Preferably, the sleeve of the aforementioned disassembly and assembly tool is connected to an air wrench.

[0018] A pipe pile mold includes an upper mold and a lower mold, wherein a plurality of mold-closing bolts as described in any of the above are provided between the upper mold and the lower mold, the base is connected to the upper mold, the nut seat is connected to the lower mold, and both the upper mold and the lower mold are provided with channels for bolt movement.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] (1) The mold clamping bolt has fewer parts, a simple structure, is easy to process, and has a low overall cost of use;

[0021] (2) The mold clamping bolts are easy to install and remove, have no springs or hinges, have a long service life, and can be replaced online.

[0022] (3) All parts are fully exposed, making it easy to detect damaged parts immediately and to facilitate oiling and maintenance;

[0023] (4) The bolt head structure has higher tolerance than the conventional bolt head with the same size at both ends, making it easier to detach;

[0024] (5) The bolt head and the disassembly and assembly tool sleeve are designed to match the slot so that the claw on the sleeve corresponds to the slot. The claw extends into the slot to drive the bolt to rotate, which greatly increases the compatibility of the bolt posture and can significantly improve the success rate and efficiency of automatic disassembly and assembly of mold bolts and pipe pile molds.

[0025] (6) The pipe pile mold can be closed by the bolt being evenly clamped under the flat washer with the intermediate nut and the lower nut that restrict rotation. When the bolt is reversed to the intermediate nut and no longer continues to retract, the bolt can be opened to open the pipe pile mold. The mold opening and closing is convenient, there are few failure points, and the safety factor is high. The mold closing bolt can be replaced at the position of the existing pipe pile mold with hinge bolt pair or spring bolt, without the need for additional modifications to the pipe pile mold, and the application cost is low. Attached Figure Description

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present invention;

[0028] Figure 2 This is an exploded structural diagram of Embodiment 1 of the present invention;

[0029] Figure 3 This is a three-dimensional structural diagram of Embodiment 2 of the present invention;

[0030] Figure 4 This is an exploded structural diagram of Embodiment 2 of the present invention;

[0031] Figure 5This is a top view of the bolt head structure of Embodiment 2 of the present invention;

[0032] Figure 6 This is a top-view perspective structural diagram of Embodiment 3 of the present invention;

[0033] Figure 7 This is an exploded structural diagram of Embodiment 3 of the present invention;

[0034] Figure 8 This is a bottom-view perspective structural diagram of Embodiment 3 of the present invention;

[0035] Figure 9 This is a top-view perspective structural diagram of the bolt head mating in Embodiment 4 and Embodiment 2 of the present invention;

[0036] Figure 10 This is a bottom-view perspective structural diagram of the bolt head mating in Embodiment 4 and Embodiment 3 of the present invention;

[0037] Figure 11 This is a three-dimensional structural diagram of Embodiment 5 of the present invention;

[0038] Figure 12 This is a three-dimensional structural diagram of Embodiment 6 of the present invention;

[0039] Figure 13 This is a diagram showing the bolt clamping state in Embodiment 6 of the present invention;

[0040] Figure 14 This is a diagram showing the bolt opening state in Embodiment 6 of the present invention;

[0041] Figure 15 This is a diagram showing the bolt replacement status in Embodiment 6 of the present invention.

[0042] In the diagram: Base 1, Groove 101, Through Hole 102, First Mating Surface 121, Intermediate Nut 2, Nut Seat 3, Opening 301, Pin Hole 302, Cotter Pin 303, Second Mating Surface 341, Lower Nut 4, First Boss 401, Bolt 5, Second Boss 501, Flat Washer 502, First Threaded Section 503, Second Threaded Section 504, Smooth Section 505, Bolt Body 506, Polygonal Prism 5061, Bolt Head 507, Slot 5071, Bevel 5072, Polygonal Groove 5073, Polygonal Hole 5074, Claw 5075, Sleeve 6, Claw Part 601, Bevel 6011, Prism Hole 602, Air Cannon 7, Output Shaft 701, Upper Mold 801, Upper Mold Tongue and Groove Plate 8011, Lower Mold 802, Lower Mold Tongue and Groove Plate 8021, Channel 901, Recess 9011. Detailed Implementation

[0043] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] Example 1:

[0047] like Figure 1 , 2 The diagram shows a preferred embodiment of the mold clamping bolt of the present invention. The mold clamping bolt includes a base 1, an intermediate nut 2, a nut seat 3, a lower nut 4, and a bolt 5. The base 1 is provided with a communicating groove 101 and a through hole 102. The groove 101 is used to install the intermediate nut 2 on the base 1 and to restrict the rotation of the intermediate nut 2. The nut seat 3 is provided with an opening 301. The opening 301 is used to install the lower nut 4 on the nut seat 3 and to restrict the rotation of the lower nut 4. The bolt 5 passes through the through hole 102 and is threadedly connected to the intermediate nut 2 and / or the lower nut 4.

[0048] Preferably, the groove 101 of the aforementioned mold clamping bolt is in a limiting fit with the top or bottom of the intermediate nut 2. The groove 101 and the intermediate nut 2 include at least one first mating surface 121 that restricts the rotation of the intermediate nut 2. The intermediate nut 2 is placed in the groove 101.

[0049] Preferably, the groove 101 is a square groove, and the intermediate nut 2 is a square nut that slides and fits with the directional hole, so that the intermediate nut 2 can slide into the base 1 from the outside of the groove 101, and the square nut wall and the square hole wall form a first mating surface 121 that restricts the rotation of the intermediate nut 2. When the bolt 5 is screwed into the lower nut 4, the intermediate nut 2 has an upward tendency. The axial clearance of the groove 101 provides a movement space for the intermediate nut shaft 5 to move upward.

[0050] Preferably, the base 1 is a square steel block for compact installation and cost reduction.

[0051] Preferably, the cross-sectional width of the groove 101 is greater than the cross-sectional width of the through hole 102, so that the groove 101 can be matched with the top or bottom of the intermediate nut 2 to prevent the intermediate nut 2 from deviating.

[0052] Preferably, in the above-mentioned mold clamping bolt, the lower nut 4 includes a first boss 401, the opening 301 is limited to the bottom of the first boss 401, the opening 301 and the lower nut 4 include at least one second mating surface 341 that restricts the rotation of the lower nut 4, the opening 301 is slidably fitted with the lower nut 4, the nut seat 3 is provided with a pin hole 302, and a cotter pin 303 is provided in the pin hole 302.

[0053] Preferably, the opening 301 has a T-shaped cross-section, the first boss 401 has a square structure, and the screw head of the lower nut 4 is made into a T-shaped structure. The T-shaped opening 301 and the bottom of the first boss 401 limit the lower nut 4, so that the lower nut 4 can slide into the nut seat 3 from the outside of the opening 301. The T-shaped opening 301 and the wall of the lower nut 4 form a second mating surface 341 that restricts the rotation of the lower nut 4. The lower nut 4 is prevented from deviating by inserting a cotter pin 303 into the pin hole 302, and the lower nut 4 is easy to replace.

[0054] Preferably, the above-mentioned mold clamping bolt 5 includes a second boss 501, which can limit the base 1.

[0055] Preferably, the bolt 5 is fitted with a flat washer 502 located between the second boss 501 and the base 1. The flat washer 502 is pressed against the top of the base 1 by the second boss 501, which plays a role in preventing loosening. The flat washer 502 and the top of the base 1 limit and disperse the pressure of the bolt head on the base 1, thereby reducing uneven wear.

[0056] Preferably, the above-mentioned mold clamping bolt 5 includes a first threaded section 503, a second threaded section 504, and a smooth section 505 located between the first threaded section 503 and the second threaded section 504. The length of the smooth section 505 is greater than the height of the threaded hole of the intermediate nut 2, and the diameter of the smooth section 505 is smaller than the minor diameter of the first threaded section 503 and the second threaded section 504. When the bolt 5 is tightened, the first threaded section 503 is threadedly engaged with the intermediate nut 2, and the second threaded section 504 is threadedly engaged with the lower nut 4.

[0057] Preferably, the first threaded section 503 is longer than the second threaded section 504. During the mold closing and locking process, the intermediate nut 2 and the first threaded section 503 always participate in the rotation until the lower nut 4 bites into the second thread and is fully screwed in. When loosening, after the second threaded section 504 loosens and disengages from the lower nut 4, the bolt still needs to be pulled up by the first threaded end 503. Preferably, the above-mentioned mold closing bolt includes a bolt body 506 and a bolt head 507. The size of one end of the bolt head 507 is smaller than the size of the other end where the bolt head 507 connects to the bolt body 506. Preferably, the bolt 5 includes a bolt body 506 and a hexagonal bolt head 507 that are integrated. This universal structure reduces costs. When the bolt 5 is disassembled and assembled using a pneumatic wrench with a matching hexagonal bolt head 507, it avoids the need for strict alignment of conventional bolt heads with the same size at both ends, which is inconvenient for the pneumatic wrench to disassemble and is also not conducive to the alignment and insertion of the pneumatic wrench before tightening the bolt. This can greatly improve tolerance and the success rate of automatic mold closing bolt disassembly and assembly equipment.

[0058] Those skilled in the art will know that, depending on the needs of the actual application, the groove 101 of the base 1 and the intermediate nut 2, the opening 301 of the nut seat 3 and the lower nut 4 can also be set to other mutually cooperating shapes, such as circles, hexagons, etc.

[0059] Example 2:

[0060] like Figure 3-5 The following is another preferred embodiment of the mold clamping bolt of the present invention. The difference between the mold clamping bolt and Embodiment 1 is that the bolt 5 includes a bolt body 506 and a bolt head 507 that is separately connected to the bolt body 506. The bolt head 507 is provided with at least two claws 5075, and a groove 5071 is formed between adjacent claws 5075. The top of the groove 5071 is provided with a slope 5072, and the top of the bolt head 507 has a conical structure.

[0061] Preferably, the bolt body 506 includes a polygonal prism 5061, and the bolt head 507 is provided with a polygonal groove 5073 that limits and cooperates with the polygonal prism 5061. The bolt head 507 is fitted onto the top of the bolt body 506 through the polygonal groove 5073 and the polygonal prism 5061, so as to realize the limiting and detachable connection between the bolt head 507 and the bolt body 506.

[0062] Preferably, the polygonal prism 5061 includes 3-8 equally divided sides, so that the bolts 5 are stably stressed when being installed or removed.

[0063] Preferably, the slot 5071 includes several slots spaced around the bolt head 507, so as to coordinate with the disassembly and assembly tools to receive force synchronously and stably.

[0064] Preferably, the bolt head 507 is limited to the second boss 501, and the bolt head 507 is supported by the second boss 501.

[0065] Example 3:

[0066] like Figure 6-8 The following is another preferred embodiment of the mold clamping bolt of the present invention. The difference between the mold clamping bolt and Embodiment 1 is that the bolt 5 includes a bolt body 506 and a bolt head 507 that is separately connected to the bolt body 506. The bolt head 507 is provided with at least two claws 5075, and a groove 5071 is formed between adjacent claws 5075. The top of the groove 5071 is provided with a slope 5072. The end of the bolt body 506 extending above the bolt head 507 has a conical structure.

[0067] Preferably, the bolt body 506 includes a polygonal prism 5061 with a conical top, and the bolt head 507 is provided with a polygonal hole 5074 that fits into the polygonal prism 5061. The bolt head 507 fits into the top of the bolt body 506 through the polygonal hole 5074 and the polygonal prism 5061. The conical top of the polygonal prism 5061 protrudes above the bolt head 507, thereby realizing a detachable connection between the bolt body 506 and the bolt head 507.

[0068] Preferably, the bolt head 507 is limited and engaged with the second boss 501, and the bolt head 507 is supported by the second boss 501.

[0069] Preferably, the bolt head 507 adopts a polygonal star-shaped head structure so that the claw 601 on the sleeve 6 corresponds to the slot 5071, and the claw 601 extends into the slot 5071 to drive the bolt 5 to rotate, which has higher tolerance.

[0070] Example 4:

[0071] like Figure 9 ,10 The figure shown is a preferred embodiment of the disassembly and assembly tool of the present invention. The disassembly and assembly tool includes a sleeve 6, and the sleeve 6 is provided with a claw 601 that cooperates with the groove 5071 of the mold closing bolt as described in Embodiment 2 or 3.

[0072] Preferably, the end face of the claw 601 is provided with a bevel 6011, which increases the ease with which the sleeve 6 bites into the bolt head 507.

[0073] In Embodiment 2 or Embodiment 3, the top of the slot 5071 is provided with a slope 5072, and the bolt body 506 extends to the end above the bolt head 507 or the top of the bolt head 507 has a conical structure. This facilitates the sleeve 6 in Embodiment 3 or Embodiment 4 to smoothly bite into the bolt head 507. The claw 601 on the sleeve 6 corresponds to the slot 5071. The claw 601 extends into the slot 5071 and rotates to cooperate with the slot 5071 to push the bolt head 507, facilitating the screw 5 to be screwed in and out. In this way, even if the axis of the bolt 5 deviates significantly from the axis of the sleeve 6, the tolerance is higher, and it can still bite in smoothly and form a stable torque transmission. This reduces the development difficulty of the automatic disassembly and assembly of the mold bolt equipment, greatly increases the compatibility with the posture of the bolt 5, and can significantly improve the success rate of the automatic disassembly and assembly of the mold bolt equipment.

[0074] Since the bolt head 507 is detachably connected to the bolt body 506, the bolt head 507 can be inserted when disassembly and assembly are required, reducing the number of spare bolt head 507 parts for multiple mold closing bolts in the pipe pile mold, saving costs. Alternatively, the bolt head 507 can be connected to the bolt body 506 as one unit after assembly, preventing the bolt head 507 from moving and falling off, thus saving assembly time.

[0075] Preferably, the inner wall of the claw 601 can be matched with the outer wall of the hexagonal bolt head 507 in Embodiment 1 to limit its movement, thereby expanding the application range of the disassembly and assembly tool.

[0076] Example 5:

[0077] like Figure 11 The following is another preferred embodiment of the disassembly and assembly tool of the present invention. The disassembly and assembly tool includes a sleeve 6. The sleeve 6 is provided with a claw 601 that cooperates with the groove 5071 of the mold clamping bolt as described in Embodiment 2 or 3. The sleeve 6 is connected to an air gun 7.

[0078] Preferably, the sleeve 6 is provided with a prism hole 602 that is connected to the output shaft 701 of the air wrench 7, so that the air wrench 7 drives the sleeve 6, which is installed with the prism hole 602 in a limited fit, to rotate through the electric drive output shaft 701, forming an air wrench wrench, which reduces the labor intensity of disassembly and assembly compared with manual drive.

[0079] Example 6:

[0080] like Figure 12 The diagram shows a preferred embodiment of the pipe pile mold of the present invention. The pipe pile mold includes an upper mold 801 and a lower mold 802. A plurality of mold-closing bolts as described in any one of Embodiments 1, 2 and 3 are provided between the upper mold 801 and the lower mold 802. The base 1 is connected to the upper mold 801, and the nut seat 3 is connected to the lower mold 802. Both the upper mold 801 and the lower mold 802 are provided with channels 901 for the movement of bolts 5.

[0081] Preferably, the base 1 is welded to the upper mold tongue and groove plate 8011 of the upper mold 801, and the nut seat 3 is welded to the lower mold tongue and groove plate 8021 of the lower mold 802. The opening 301 faces the outside of the pipe pile mold. The middle nut 2 is installed into the base 1, and the lower nut 4 is installed into the nut seat 3, so that the lower nut 4 is in a limiting fit with the lower mold 802.

[0082] Preferably, the channel 901 is a recess 9011 respectively provided on the upper mold 801 and the lower mold 802, so that the bolt 5 is exposed when it moves in the recess 9011, so that damage can be detected and oiled for maintenance as soon as possible.

[0083] The principle of disassembly and assembly of pipe pile molds is as follows:

[0084] When the pipe pile mold is closed, the flat washer 502 is placed on the bolt 5. The bolt 5 is rotated by the existing or the disassembly and assembly tool described in this invention. The end of the bolt 5 can be screwed into the through hole 102 of the base 1 from top to bottom. After the second threaded section 504 engages with the threaded hole of the intermediate nut 2, it continues to descend along the channel 901 until it is screwed into the threaded hole of the lower nut 4. At the same time, the first threaded section 503 engages with the threaded hole of the intermediate nut 2. The bolt 5 is limited by the first boss 401 and the flat washer 502 to the top of the base 1, forming a shape like... Figure 13 As shown, bolt 5 is clamped, and the clamping of bolt 5 forms prestress. Multiple clamping bolts are installed at intervals on the upper mold tongue and groove plate 8011 of the upper mold 801 and the lower mold tongue and groove plate 8021 of the lower mold 802. The upper mold 801 and the lower mold 802 are reliably connected to realize the clamping and installation of the pipe pile mold.

[0085] When the pipe pile mold is opened, the existing or the disassembly and assembly tool described in this invention drives the bolt 5 to rotate in the opposite direction. The intermediate nut 2 and the lower nut 4 simultaneously pull the bolt 5 upward until the second threaded section 504 disengages from the threaded hole of the lower nut 4. The bolt 5 continues to rotate in the opposite direction until the first threaded section 503 disengages from the threaded hole of the intermediate nut 2. At this time, the smooth section 505 is located in the threaded hole area of ​​the intermediate nut 2, and even if it continues to rotate in the opposite direction, it will no longer pull upward, as shown in the figure. Figure 14When the bolt 5 is in the open state, the bolt 5 is disconnected from the lower mold 802. The bolt 5 is prevented from deviating under the limit of the through hole 102. When all the bolts 5 of the corresponding mold closing bolts are removed to the open state, the upper mold 801 and the lower mold 802 can be separated to realize the mold opening of the pipe pile mold. There is no need to completely remove the bolts 5, which saves time and effort for the pipe pile mold to be closed and reassembled.

[0086] When internal parts need to be replaced, Figure 14 In this state, the lower nut 4 can be replaced by pulling out the cotter pin 303. Figure 14 In this state, by lifting bolt 5 while simultaneously rotating bolt 5 in the opposite direction, the second threaded section 504 will fully retract after engaging with the threaded hole of the intermediate nut 2, thus retracting the bolt. Figure 15 The bolt 5 is shown in the replacement state. Bolt 5 can be removed to replace the flat washer 502, the intermediate nut 2 and bolt 5.

[0087] The aforementioned mold-closing bolts can be used in the assembly and disassembly structure of pipe pile molds, but are not limited to their use in the assembly and disassembly of pipe pile molds.

[0088] In summary, the present invention has the following technical advantages over the prior art:

[0089] ① The mold clamping bolt has fewer parts, a simplified structure, is easy to process, and has a low overall cost of use;

[0090] ② The mold clamping bolts are easy to assemble and disassemble. They have no springs or hinges and their lifespan is significantly longer than that of traditional spring bolt pairs and hinge bolt pairs. All parts can be disassembled and assembled on the outside of the pipe pile mold. Any damaged part can be replaced in a very short time. Workers can replace it online without having to lift the pipe pile mold off the production line for offline replacement.

[0091] ③ All parts are fully exposed, making it easy to spot damaged parts immediately and to facilitate oiling and maintenance;

[0092] ④ The size of one end of the bolt head 507 is smaller than the size of the other end where the bolt head 507 connects to the bolt body 506. This provides greater tolerance than a conventional bolt head with consistent dimensions at both ends, making it easier to detach the bolt 5.

[0093] ⑤ The bolt head 507 and the disassembly tool sleeve 6 are designed to match and optimize the design. The claw 601 on the sleeve 6 corresponds to the slot 5071. The claw 601 extends into the slot 5071 and drives the bolt 5 to rotate. The sleeve 6 does not need to be strictly aligned with the bolt 5 for tightening and loosening. The compatibility with the posture of the bolt 5 is greatly increased, which can significantly improve the success rate and efficiency of automatic disassembly and assembly of mold bolts and pipe pile molds.

[0094] ⑥ When the mold closing bolt is applied to the pipe pile mold, the pipe pile mold can be closed by the bolt 5 being evenly clamped under the flat washer 502 with the intermediate nut 2 and the lower nut 4 that restrict rotation. The pipe pile mold can be opened by the bolt 5 being reversed until the smooth rod section 505 reaches the intermediate nut 2 and no longer continues to retreat. The mold opening and closing is convenient, there are few failure points, and the safety factor is high. The mold closing bolt can be replaced at the position of the existing pipe pile mold with a hinge bolt pair or spring bolt, without the need for additional modifications to the pipe pile mold, and the application cost is low.

[0095] The detailed descriptions listed above are merely specific illustrations of feasible embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A mold clamping bolt, characterized in that, The device includes a base (1), an intermediate nut (2), a nut seat (3), a lower nut (4), and a bolt (5). The base (1) has a communicating groove (101) and a through hole (102). The groove (101) is used to install the intermediate nut (2) on the base (1) and to restrict the rotation of the intermediate nut (2). The nut seat (3) has an opening (301) for installing the lower nut (4) on the nut seat (3) and to restrict the rotation of the lower nut (4). The bolt (5) passes through the through hole (102) and is threadedly connected to the intermediate nut (2) and / or the lower nut (4). The bolt (5) includes a first threaded section (503), a second threaded section (504), and a smooth section (505) located between the first threaded section (503) and the second threaded section (504). When the bolt (5) is tightened, the first threaded section (503) is threadedly connected to the intermediate nut (2), and the second threaded section (504) is threadedly connected to the lower nut (4).

2. A mold clamping bolt according to claim 1, characterized in that, The groove (101) is fitted with the top or bottom of the intermediate nut (2). The groove (101) and the intermediate nut (2) include at least one first mating surface (121) that restricts the rotation of the intermediate nut (2). The intermediate nut (2) is placed in the groove (101).

3. A mold clamping bolt according to claim 1, characterized in that, The lower nut (4) includes a first boss (401), the opening (301) is limited to the bottom of the first boss (401), the opening (301) and the lower nut (4) include at least one second mating surface (341) that restricts the rotation of the lower nut (4), the nut seat (3) is provided with a pin hole (302), and a cotter pin (303) is provided in the pin hole (302).

4. A mold clamping bolt according to claim 1, characterized in that, A flat washer (502) is provided between the bolt (5) and the base (1).

5. A mold clamping bolt according to claim 2, characterized in that, The length of the smooth rod section (505) is greater than the height of the screw hole of the intermediate nut (2), and the diameter of the smooth rod section (505) is smaller than the minor diameter of the first threaded section (503) and the second threaded section (504).

6. A mold clamping bolt according to claim 1, characterized in that, The bolt (5) includes a bolt body (506) and a bolt head (507), wherein the head end size of the bolt head (507) is smaller than the size of the end of the bolt head (507) that is connected to the bolt body (506).

7. A mold clamping bolt according to claim 6, characterized in that, The bolt body (506) and the bolt head (507) are connected in an integral or separate manner. The bolt head (507) is provided with at least two claws (5075), and a groove (5071) is formed between adjacent claws (5075).

8. A mold clamping bolt according to claim 7, characterized in that, The top of the slot (5071) is provided with a slope (5072), and the bolt body (506) extends to the end above the bolt head (507) or the top of the bolt head (507) is a conical structure.

9. A pipe pile mold, comprising an upper mold (801) and a lower mold (802), characterized in that, A plurality of mold-closing bolts as described in any one of claims 1 to 8 are provided between the upper mold (801) and the lower mold (802). The base (1) is connected to the upper mold (801), and the nut seat (3) is connected to the lower mold (802). Both the upper mold (801) and the lower mold (802) are provided with channels (901) for the movement of the bolts (5).

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