A PCCPE pipe mold top cover automatic pressing and disassembly device

Abstract

The invention discloses an automatic pressing and disassembling device for a PCCPE pipe mold top cover, and relates to the technical field of prestressed steel cylinder concrete pipes. The invention comprises three disassembling components with the same structure uniformly distributed on the pipe mold according to the circumference, each disassembling component comprises a disassembling screw, a pressing device, a lifting plate device, an upper support installed on the inner ring of the top cover, and a lower support installed on the inner mold and corresponding to the upper support, a threaded hole matched with the disassembling screw is arranged in the vertical direction of the lower support, a guide hole corresponding to the threaded hole and matched with the clearance of the disassembling screw is arranged in the vertical direction of the upper support, the disassembling screw passes through the threaded hole and the guide hole in sequence from bottom to top and is detachably connected with the pressing device, and the lifting plate device is sleeved on the disassembling screw located between the upper support and the lower support; the invention has the advantages of simple structure, convenient disassembly and pressing, and the purpose of disassembly or pressing is achieved by the gravity of the inner mold and the rise and fall of the screw.

Description

Technical Field

[0001] The present invention relates to the technical field of prestressed concrete cylinder pipes, and more specifically to the technical field of automatic pressing and disassembling devices for PCCPE pipe mold top covers. Background Art

[0002] Prestressed Concrete Cylinder Pipe (PCCP) is a new type of composite pipe made by welding thin steel plates and socket joint steel rings into a cylinder, and then pouring concrete inside and outside the cylinder by vertical vibration method. For small-diameter pipes, the tube core can be formed in the cylinder by horizontal centrifugal method. After curing, annular prestressed steel wire is wound on the outer surface of the tube core to establish annular prestress in the pipe wall concrete. Finally, a mortar protective layer is sprayed on the outer surface of the wire-wrapped tube core.

[0003] PCCP pipes have the characteristics of high internal and external pressure, good joint sealing, strong earthquake resistance, convenient and quick construction, good corrosion resistance and easy maintenance. They are widely used in inter-basin water diversion, agricultural water supply, urban water supply, water distribution, industrial park water supply, thermal power plant and nuclear power plant water supply, circulating water pipelines and large pressure sewage pipelines. PCCP can be divided into PCCPL lined prestressed steel cylinder concrete pipe and PCCPE buried prestressed steel cylinder concrete pipe according to its structural form. The basic structure of PCCPE is composed of a steel cylinder with sockets at both ends, a pipe core, a prestressed steel wire wrapped around the pipe core, and an outer protective layer.

[0004] The PCCPE tube core is formed by vertical concrete pouring and vibration forming process. Figure 5 As shown, the casting mold used consists of four parts: base, inner mold, outer mold, and top cover. The mold assembly must be completed before the tube core is cast and formed, and the mold disassembly must be completed after forming. Before the tube core is formed, the tube mold assembly process is as follows: mold cleaning-→ assemble the inner mold-→ hang the steel cylinder-→ hang the top cover-→ press the top cover-→ assemble the outer mold; after the tube core is formed, the tube mold disassembly process during demoulding is as follows: disassemble the outer mold-→ pull the top cover-→ disassemble the inner mold-→ lift the tube core-→ next operation cycle.

[0005] The function of the pipe mold top cover is to press the steel cylinder into place so that the end face of the steel cylinder socket is close to the base plane. At the same time, relying on the inner and outer circular surfaces on the top cover and the positioning surface of the steel cylinder socket, the inner mold, outer mold and steel cylinder are in a coaxial state, maintaining the roundness of the inner and outer concrete surfaces of the pipe core and the roundness of the steel cylinder socket, and at the same time making the pipe core length meet the standard to avoid eccentricity between the structural surfaces of the pipe core.

[0006] The existing top cover assembly operation method is: after the top cover is lifted onto the inner mold and the steel cylinder, the crane will replace the lifting device with a heavy object, and then use the heavy object to repeatedly press and hit the top cover. For a large-diameter tube core, the top cover is basically pressed 3 to 6 times to make the matching surface of the socket end of the steel cylinder basically in place. After completion, the crane needs to replace the lifting device again; the existing top cover disassembly operation method is: the top cover is disassembled by direct pulling.

[0007] Specifically, the existing assembly method of the top cover using heavy objects to press tightly has the following defects:

[0008] 1) After the top cover is assembled and pressed, there is still a small amount of deflection, there is still a gap of more than 3mm between the end face of the steel cylinder socket and the base, or the end face of the steel cylinder socket is deflected, which has a great impact on the quality of the pipeline;

[0009] 2) The crane needs to frequently change the lifting equipment, which leads to low working efficiency;

[0010] 3) After the top cover is assembled, it is in a free state and is easily loosened due to the vibration force during the tube core molding. The roundness constraint of the steel cylinder socket fails, causing the socket roundness to exceed the quality standard. At the same time, the positioning of the inner and outer molds fails, causing the molded tube core concrete to be deviated.

[0011] 4) It is difficult to put the top cover in place at one time. Sometimes it is in a skewed state after being hung, and it needs to be dragged with heavy objects or pressed and smashed several times to correct it;

[0012] 5) When the heavy object is swinging, the edge of the top cover is frequently pressed, which not only has low work efficiency and primitive operation methods, but also easily causes the heavy object to fall off and damage the working platform, posing a greater safety risk to the lower working facilities and personnel;

[0013] The existing top cover is disassembled by direct pulling and pulling, which has the following defects:

[0014] 1) The part with less stress comes out first, the top cover is tilted, and the inner wall concrete of the socket end is damaged, which affects the product quality and increases the amount of pipe core repair;

[0015] 2) The top cover basically pops out of the tube core, which poses certain safety risks to the spreader and operators.

[0016] In summary, the existing top mold assembly and disassembly methods have the disadvantages of low work efficiency, primitive operation methods, rough work quality, etc. How to solve the above technical problems has become the direction of efforts of those skilled in the art. Summary of the invention

[0017] The purpose of the present invention is to solve the technical problems of low work efficiency, primitive operation mode and rough work quality in the top mold assembly and disassembly methods in the existing PCCPE tube core molding process. The present invention provides an automatic pressing and disassembly device for the top cover of the PCCPE tube mold.

[0018] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0019] A PCCPE pipe mold top cover automatic pressing and disassembly device. The PCCPE pipe mold consists of four parts: a base, an inner mold, an outer mold, and a top cover, including three disassembly components with the same structure evenly distributed on the pipe mold according to the circumference, each disassembly component includes a disassembly screw, a pressing device, a lifting plate device, an upper support installed on the inner ring of the top cover, and a lower support installed on the inner mold corresponding to the upper support. The lower support is vertically provided with a threaded hole that cooperates with the disassembly screw, and the upper support is vertically provided with a guide hole that corresponds to the threaded hole and cooperates with the clearance of the disassembly screw. The disassembly screw passes through the threaded hole and the guide hole in sequence from bottom to top and is detachably connected to the pressing device. The lifting plate device is sleeved on the disassembly screw located between the upper support and the lower support, and the lifting plate device is locked on the disassembly screw by a locking nut, and also includes a driving device for driving the disassembly screw to rotate.

[0020] Furthermore, the guide hole is a tapered hole with a small top and a large bottom.

[0021] Furthermore, the pressing device is a clamping plate, and a circle of clamping grooves for installing the clamping plate is provided on the pressure removal screw. A U-shaped groove for easy disassembly is provided on the pressure plate. The width of the U-shaped groove is greater than the diameter of the pressure removal screw at the clamping groove, and the width of the U-shaped groove is smaller than the outer diameter of the pressure removal screw. The pressure plate is fixed to the pressure removal screw by a nut, and the width of the clamping plate is greater than the top diameter of the guide hole. A hexagonal head cooperating with the driving device is provided on the top of the pressure removal screw.

[0022] Furthermore, the lifting plate device is a lifting plate, and the width of the lifting plate is greater than the diameter of the large diameter section at the bottom of the guide hole.

[0023] Furthermore, the three compression dismantling components are evenly arranged at intervals of 120° along the inner circle of the top cover.

[0024] Furthermore, the driving device is a pneumatic or electric rotary driving mechanism.

[0025] Furthermore, the upper support is mounted on the inner ring of the top cover by welding, and the lower support is fixedly arranged on the inner wall of the inner mold by welding.

[0026] The beneficial effects of the present invention are as follows:

[0027] 1. The present invention has a simple structure, which completely changes the original top cover installation and removal method of using heavy objects to press and external force to pull, greatly improves the work efficiency of mold assembly and disassembly, avoids quality defects caused by the top cover being installed in an oblique manner, improves the quality of tube core molding, and reduces safety risks during the operation process; pneumatic or electric tools are used as power, and the gravity of the inner mold and the rise and fall of the screw are used to achieve the purpose of disassembly or clamping, with a high degree of automation. The clamping force is always maintained during the molding process and will not loosen. The clamping and lifting are achieved through the spiral clamping force of the clamping plate and the lifting plate, which effectively guarantees the product quality.

[0028] 2. Each set of pipe molds is equipped with 3 disassembly components, which are evenly arranged at intervals of 120° along the inner circle of the pipe mold top cover. The upper support is welded to the inner circle of the top cover, and the lower support is welded to the lower edge of the inner mold positioning ring. The welding position should be appropriately adjusted according to the position of the upper support. This structural setting makes the disassembly and compression of the top cover more uniform.

[0029] 3. The clamping plate has a U-shaped groove for easy placement and removal.

[0030] 4. The disassembly and compression screw is a spiral force transmission device for compacting or lifting disassembly. Its rise or fall is used to achieve the purpose of disassembly or compaction. The screw also serves as an installation guide rod, and a hexagonal head is designed on the upper part to realize the input of power. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 yes Figure 1 Schematic diagram of the structure in the disassembled state of section AA;

[0033] Figure 3 yes Figure 1 Schematic diagram of the structure in the compressed state of the AA section

[0034] Figure 4 yes Figure 1 A partial enlarged view of point B in the middle;

[0035] Figure 5 yes Figure 1 Schematic diagram of the pipe mold structure without adding or removing the pressure components;

[0036] Figure numerals: 1-disassembly screw, 2-pressing device, 3-upper support, 4-locking nut, 5-lifting plate device, 6-top cover, 7-lower support, 8-inner mold. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Example 1

[0039] like Figures 1 to 4 As shown, the present embodiment provides an automated pressing and disassembly device for the top cover of a PCCPE pipe mold, comprising three disassembly components with the same structure uniformly distributed on the pipe mold according to the circumference, each disassembly component comprising a disassembly screw 1, a pressing device 2, a lifting plate device 5, an upper support 3 installed on the inner ring of the top cover 6, and a lower support 7 installed on the inner mold 8 and corresponding to the upper support 3, a threaded hole matching the disassembly screw 1 is vertically arranged on the lower support 7, a guide hole corresponding to the threaded hole and matching with the disassembly screw 1 is vertically arranged on the upper support 3, the disassembly screw 1 passes through the threaded hole and the guide hole in sequence from bottom to top and is detachably connected to the pressing device 2, the lifting plate device 5 is sleeved on the disassembly screw 1 between the upper support 3 and the lower support 7, the lifting plate device 5 is locked on the disassembly screw 1 by a locking nut 4, and also includes a driving device for driving the disassembly screw 1 to rotate.

[0040] Working process:

[0041] Mould installation: After the inner mould and steel cylinder are in place, hoist the top cover, and pass the demolition screw through the threaded holes on the lower support and the guide holes on the upper support in turn. Lift the top cover steadily to the assembly position. After the clamping plate groove on the upper part of the demolition screw is exposed, place the pressing device with a U-shaped groove on the clamping groove of the demolition screw, use pneumatic or electric tools as power to press the screw evenly. At this time, the pressing device contacts the upper plane of the upper support, and the spiral pressing force is used to press the top cover and the steel cylinder into place.

[0042] Mold removal: When removing the mold, first use pneumatic or electric tools to loosen and remove the clamping screw in reverse, so that the screw rises about 70mm. At this time, the lifting plate contacts the lower end surface of the upper support, and the lifting force of the screw is used to lift the top cover to detach from the end surface of the steel cylinder. Before lifting the top cover, the clamping plate should be removed to complete the disassembly operation.

[0043] Example 2

[0044] This embodiment is further optimized on the basis of embodiment 1, specifically:

[0045] The guide hole is a tapered hole with a small top and a large bottom.

[0046] The pressing device 2 is a clamping plate, and a circle of clamping grooves for installing the clamping plate is provided on the pressure removal screw 1. A U-shaped groove for easy disassembly is opened on the clamping plate. The width of the U-shaped groove is greater than the diameter of the pressure removal screw 1 at the clamping groove, and the width of the U-shaped groove is smaller than the outer diameter of the pressure removal screw 1. The clamping plate is fixed to the pressure removal screw 1 by a nut. The width of the clamping plate is greater than the top minor diameter of the guide hole. A hexagonal head cooperating with the driving device is provided on the top of the pressure removal screw 1.

[0047] The disassembly and compression screw is a spiral force transmission device for compacting or lifting disassembly. Its rise or fall is used to achieve the purpose of disassembly or compaction. The screw also serves as an installation guide rod, and a hexagonal head is designed on the upper part to realize the input of power.

[0048] The lifting plate device 5 is a lifting plate, and the width of the lifting plate is greater than the major diameter of the bottom of the guide hole.

[0049] The three pressure-removing components are evenly arranged at intervals of 120° along the inner circle of the tube mold top cover.

[0050] The driving device is a pneumatic or electric rotary driving mechanism.

[0051] The upper support 3 is mounted on the inner circle of the top cover 6 by welding, and the lower support 7 is fixedly arranged on the inner wall of the inner mold 8 by welding.

Claims

1. A PCCPE pipe mold top cover automatic pressing and disassembly device, characterized by: The invention comprises three dismantling components of the same structure uniformly distributed on the pipe mold according to the circumference, each dismantling component comprises a dismantling screw (1), a pressing device (2), a lifting plate device (5), an upper support (3) mounted on the inner ring of the top cover (6), and a lower support (7) mounted on the inner mold (8) and corresponding to the upper support (3), the lower support (7) is provided with a threaded hole in the vertical direction to match the dismantling screw (1), the upper support (3) is provided with a guide hole in the vertical direction to correspond to the threaded hole and to match with the dismantling screw (1) in clearance, the dismantling screw (1) passes through the threaded hole and the guide hole in sequence from bottom to top to be detachably connected with the pressing device (2), the lifting plate device (5) is sleeved on the dismantling screw (1) located between the upper support (3) and the lower support (7), the lifting plate device (5) is locked on the dismantling screw (1) by a locking nut, and also comprises a driving device for driving the dismantling screw (1) to rotate; The pressing device (2) is a pressing plate, and a circle of pressing grooves for installing the pressing plate is provided on the pressure removal screw (1). A U-shaped groove is provided on the pressing plate for easy disassembly. The width of the U-shaped groove is greater than the diameter of the pressure removal screw (1) at the pressing groove, and the width of the U-shaped groove is less than the outer diameter of the pressure removal screw (1). The pressing plate is fixed to the pressure removal screw (1) by a nut. The width of the pressing plate is greater than the top diameter of the guide hole. A hexagonal head cooperating with the driving device is provided on the top of the pressure removal screw (1); The three compression dismantling assemblies are evenly arranged at intervals of 120° along the inner circle of the top cover (6).

2. The PCCPE pipe mold top cover automatic pressing and disassembly device according to claim 1 is characterized in that: The guide hole is a tapered hole with a small top and a large bottom.

3. The PCCPE pipe mold top cover automatic pressing and disassembly device according to claim 2 is characterized in that: The lifting plate device (5) is a lifting plate, and the width of the lifting plate is greater than the major diameter of the bottom of the guide hole.

4. The PCCPE pipe mold top cover automatic pressing and disassembly device according to claim 1 is characterized in that: The driving device is a pneumatic or electric rotary driving mechanism.

5. The PCCPE pipe mold top cover automatic pressing and disassembly device according to claim 1 is characterized in that: The upper support (3) is mounted on the inner ring of the top cover (6) by welding, and the lower support (7) is fixedly mounted on the inner wall of the inner mold (8) by welding.

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