A mold and method for making ultra-wide continuous size specimens

Abstract

A mold for making ultra-wide, continuous-size specimens comprises a front-end traction mechanism, an assembly unit, a connecting and locking mechanism, a rear-end traction mechanism, and a stepless width adjustment mechanism. A certain number of assembly units are installed between the front-end traction mechanism and the rear-end traction mechanism. The assembly units, the front-end traction mechanism, and the rear-end traction mechanism are connected by a connecting and locking mechanism. The stepless width adjustment mechanism is installed in the front-end traction mechanism and the splicing unit connected thereto. The splicing units are pressed and docked using flexible rubber sheets. The area enclosed by the stepless width adjustment mechanism, the rear-end traction mechanism, and the assembly units serves as a workspace for placing a mold base. A method for making ultra-wide, continuous-size specimens is also provided. The present invention is characterized by convenient disassembly, cleaning, and transportation, and high efficiency.

Description

Technical Field

[0001] The present invention relates to a mold and method for making samples of ultra-wide and continuous sizes, and in particular to a mold and method for making structural surface samples of materials such as concrete in an ultra-wide and continuous size range, which are convenient to disassemble, clean and transport and have high efficiency. Background Art

[0002] Accurately determining the shear strength of ultra-large-scale rock mass structural surfaces is a fundamental scientific problem studied by scholars in the field of rock mechanics, and it remains a frontier and hot topic in the discipline. However, previous research has shown that limited test size and conditions have prevented the determination of shear strength parameters for large-scale structural surfaces in both indoor and in-situ testing. Currently, the constitutive models, failure criteria, and reduction parameters used in stability assessment and reinforcement design for engineering rock masses are based on conventional small-scale direct shear tests, which lacks scientific validity. Rock mass structural surfaces range in size from a few centimeters to several thousand meters. The larger the size of the unstable structural surface in a rock mass, the more severe the consequences. Producing ultra-wide, continuous-size rock mass structural surfaces is a necessary experimental requirement for determining the mechanical parameters of large-scale rock mass structural surfaces. Patent No. 202011492947.0 defines a continuously adjustable-width rock mass structural surface specimen. It is divided into upper plate and lower plate specimens based on the fracture plane (structural surface). The specimen width refers to the continuous range of lengths, from thin to very long.

[0003] To accommodate the casting of specimens with varying lengths, several existing patents utilize assembly and splicing methods. For example, Patent No. 201520013890.X proposes a freely assembleable mold, which utilizes a number of baffle components mounted on a base plate and reinforced with concave and convex structures and bolts. Patent No. 201710284382.9 proposes an easily removable assembled concrete standard test block mold and its operating method, using male and female joints to connect adjacent U-shaped units. Patent No. 201811456256.8 proposes an assembleable test block mold with a modular design and the use of columns to clamp and position the combined side panels. Patent No. 202122919929.2 is an easily detachable splicing concrete mold that uses horn hooks to lock the side panels for splicing. Patent No. 201811328041.8 proposes a method for making multiple sets of spliced ​​rock structure surface molds based on 3D printing at one time. The bottom plate and the two side plates are spliced ​​using fixing strips. Patent No. 201911224193.8 uses partition and splicing methods for assembly and connection. Similar solutions include those proposed in patents 202122652169.3 and 201510329020.8. However, these patents are difficult to solve the problem of making ultra-wide and continuous-sized concrete specimens, mainly including the following:

[0004] 1. The existing modular splicing solution cannot meet the casting requirement of stepless length adjustment. At the same time, it does not take into account the width change of the casting sample and can only be cast in a mold box of specified size.

[0005] 2. The existing solution has the problem of cumbersome disassembly and easy damage. Since concrete and other materials have a significant expansion effect for a period of time after pouring (especially in the middle of the specimen with a large length), the connectors and side panels may be deformed or even damaged.

[0006] 3. The existing solution cannot meet the transportation convenience of ultra-wide and continuous-sized specimens. When the specimens are very long and heavy, the traditional operation process of first removing the mold, then installing the specimen on the transport vehicle, and finally unloading the specimen is time-consuming and labor-intensive.

[0007] 4. The existing solution did not consider the sealing of the splicing mold, resulting in water leakage affecting the performance of the casting sample and also causing rust on bolts and other connecting parts;

[0008] 5. The existing solution does not consider the installation of a mold base with a structural surface. During the casting process, the specimen needs to have a structural surface, which generally requires the mold base to be installed in the mold and cast on top of it;

[0009] 6. The existing solution does not consider the high rigidity of the mold when the specimen is long. When the expansion force generated by pouring causes the mold to deform, it also causes the specimen itself to deform, affecting the test and deformation measurement results. Therefore, mold rigidity is a prerequisite for ensuring the quality of the cast specimen.

[0010] 7. The existing scheme does not consider the issue of sample preparation efficiency. During the sample preparation process, two samples need to be loaded and tested in the form of overlapping structural surfaces. The casting and molding of one sample often takes one month, while two samples require two months. Under the condition of minimizing the use of mold materials, it is necessary to solve the efficiency problem of the simultaneous casting of the upper and lower plate samples.

[0011] Therefore, there is currently no sample preparation mold and usage method suitable for casting and molding ultra-wide and continuous-size samples. Summary of the Invention

[0012] In order to overcome the shortcomings of the existing technology, the present invention provides a mold and method for making ultra-wide and continuous-size specimens that are convenient to disassemble, clean and transport and highly efficient.

[0013] The technical solution adopted by the present invention to solve its technical problem is:

[0014] A mold for making ultra-wide continuous-size specimens, the mold comprising a front-end traction mechanism, an assembly unit, a connecting locking mechanism, a rear-end traction mechanism and a stepless width adjustment mechanism, a certain number of assembly units are installed between the front-end traction mechanism and the rear-end traction mechanism, the assembly units, the front-end traction mechanism and the rear-end traction mechanism are connected by a connecting locking mechanism, the stepless width adjustment mechanism is installed in the front-end traction mechanism and the assembly unit connected thereto, the assembly connection units are pressed and connected with each other using flexible rubber sheets, and the area enclosed by the stepless width adjustment mechanism, the rear-end traction mechanism and the various assembly units is a working space for placing the mold base.

[0015] Furthermore, the front-end traction mechanism and the rear-end traction mechanism both include a pull rod, a vertical plate, a turntable, a screw, a base, a connecting ring, a wheel and a pressure plate. Four wheels are installed at the bottom of the base. The vertical plate is composed of a vertical plate and reinforcing ribs on both sides. The vertical plate is installed on the right side above the base along the direction of wheel movement. The vertical plate of the vertical plate is aligned with the right side of the base. A hole is provided below the vertical plate to facilitate adjustment of the width of the stepless adjustment mechanism. The pull rod is fixed on the left side above the base, and the connecting ring is installed on the left side of the base. The upper end of the screw is connected to the turntable, and the lower end of the screw is connected to the pressure plate. The screw passes vertically through the base to form a threaded transmission.

[0016] Furthermore, the assembly unit includes a support frame, side panels, rubber sheets, a clamping mechanism and a chassis. Four wheels are installed at the bottom of the chassis. There is a raised platform in the middle position above the chassis. The mold base can be placed above the raised platform. There is a raised baffle on both sides of the chassis close to the wheel. The two side panels are placed on both sides of the raised platform or the mold base respectively. A clamping mechanism is installed between the raised baffle and the side panels. Rubber sheets are installed at both ends of the side panels and the raised platform of the chassis. The support frame is installed directly above the two side panels and can be tightened by eye bolts. The clamping mechanism includes a handwheel with a screw, a fixing seat and a clamping block. The fixing seat rests on the inner side of the raised baffle. The clamping block is installed above the fixing seat and moves along it in a limited direction. The screw part of the screw handwheel passes through the fixing seat and forms a threaded transmission. The end of the screw part with the screw handwheel can directly contact one side of the clamping block.

[0017] Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion.

[0018] Preferably, the surface of the vertical plate of the rear end traction mechanism is smooth and flat.

[0019] The connection locking mechanism includes a left fixed plate, a pin, a rotating bolt, a right fixed plate, a nut and a bolt. The left fixed plate and the right fixed plate are respectively fixed between adjacent assembly units or near the junction between the assembly unit and the traction mechanism by bolts. The pin passes through the two protrusions of the left fixed plate, and the sleeve end of the rotating bolt passes through the pin and causes the screw end to rotate around it. After the screw end is rotated between the two protrusions of the right fixed plate, it can be fixed in place with a nut and a gasket.

[0020] The bases of the front and rear traction mechanisms and the chassis of the assembly unit are provided with concave-convex structures. The assembly unit or the assembly unit and the front and rear traction mechanisms are aligned through the concave-convex structures and locked with pins.

[0021] In the assembly unit, the length dimension is defined as follows:

[0022] 1) Determine the size requirements of the upper and lower plate samples for the test, and define the length range of the ultra-wide continuous size sample as [L min , L max ], the width of the specimen is W, the length interval of the specimens of consecutive sizes is △L, and the pouring frequency of specimens of different sizes is determined;

[0023] 2) Define the reference length L0 of the assembly unit, and take L0 = L min +p△L and satisfy W≤L0≤aW, where p is an integer, a≥1, a is related to the adjustment range and convenience of the width stepless adjustment mechanism, and the reference length that meets the requirements is L0=[L 01 , L 02 ,…,L 0m ], where m is the maximum number of conditions that meet the requirements;

[0024] 3) Define the number of assembly units with a length of reference length L0, satisfying x = L max / L0, obtain x=[x1,x2,…,x m ], each value is rounded to two decimal places, and the value of x with the first digit after the decimal point greater than 8 or 0 is generally selected. The optimal solution is the one with the first digit after the decimal point of x being 0. If there is no such solution, the solutions with the two decimal places closest to 99 are selected. The sum of the optimal solution and other solutions is generally no more than 5. At this time, the L0 value of x can be obtained;

[0025] 4) Define the length of each assembly unit. To reduce the total number of connected units, the length of each assembly unit is n times the reference length, that is, nL0, where n is an integer. The lengths of each assembly unit are arranged from small to large as L = [L1, L2, ..., L x ], where adjacent L values ​​can be the same. For a specific L0 value, a variety of permutations and combinations can be formed. In order to meet the principle of a small number of assembly units, the first two types with a small number are generally selected;

[0026] 5) Determine the optimal solution that meets the requirements of simultaneous pouring of upper and lower plate specimens, based on the principle of meeting the pouring frequency and operation convenience of small-size specimens and the shortest cumulative length of assembly units, and determine the optimal length solution of each assembly unit and L1, L2, ..., L through a list or other form. x The number of

[0027] A method for producing ultra-wide and continuous-size samples, comprising the following steps:

[0028] Step (1) selecting the corresponding assembly units according to the sizes of the upper and lower plates of the casting sample and moving them together with the front and rear end traction mechanisms to the designated positions;

[0029] Step (2) The chassis of the assembly unit and the base of the front and rear end traction mechanism are connected and tightened, and the stepless adjustment block of the width stepless adjustment mechanism is adjusted according to the length and size requirements of the sample. Then, a certain number of standard support blocks are installed, and the movable vertical plate is installed. The turntable of the front and rear end traction mechanism is adjusted so that the pressure plate presses the ground to prevent the wheel from rotating. During this period, if the continuous size samples meet the regular interval size progressive method, the stepless adjustment block is not required;

[0030] Step (3) Install the mold base onto the raised platform of the assembly unit, install the side panels of the assembly unit, and connect and secure them with a connecting and locking mechanism, press each side panel to the two sides of the mold base with a pressing mechanism, install the limit frame of the stepless width adjustment mechanism, and secure the upper end of the movable vertical panel to the side panel;

[0031] Step (4) placing a film inside the area surrounded by the movable vertical plate of the width stepless adjustment mechanism, the vertical plate of the rear end traction mechanism, the side plates of the assembly unit and the mold base, pouring the stirred concrete, and mixing and smoothing it with a stirring rod after pouring;

[0032] Step (5) installing a set number of support frames above the side panels of each assembly unit to enhance rigidity;

[0033] Step (6) The casting method of the upper and lower plate samples is the same. When removing the mold, the pressing mechanism of the assembly unit and the stepless adjustment block of the shortening width stepless adjustment mechanism can be unscrewed first, and then the support frame, connection locking mechanism and side plate can be removed;

[0034] Step (7) selecting the traction mode of the front and rear end traction mechanisms according to the weight of the sample, adjusting the turntables of the front and rear end traction mechanisms so that the pressure plates are off the ground to facilitate the rotation of the wheels, and manually pulling or pushing the pull rods of the front and rear end traction mechanisms to the designated position if the sample is light, and pulling the sample to the designated position after connecting to the connecting ring using a power device such as a flatbed truck or forklift if the sample is heavy;

[0035] Step (8) remove the sample, disassemble, clean and return each mechanism to its original position.

[0036] The beneficial effects of the present invention are mainly manifested in:

[0037] 1. The combination of the stepless width adjustment mechanism and various assembly units can meet the casting requirements of ultra-wide and continuous stepless size specimens. The fixed position of the side panels is adjusted according to the width of the mold base, and movable vertical panels of different widths are configured to adapt to the changing requirements of the casting specimen length and width;

[0038] 2. In order to cope with the influence of the sample expansion effect, the connection locking mechanism adopts a structure that is easy to disassemble and assemble. The eye bolt with screw handwheel and support frame of the assembly unit clamping mechanism is a manual and convenient operation method, which solves the problem that ordinary bolts and screws cannot be disassembled due to rust;

[0039] 3. The assembly unit and the front and rear traction mechanisms are equipped with wheels for easy transportation. Under the action of external manpower or power devices, the ultra-wide and continuous size specimens are transported to the designated location. The process is simple to operate.

[0040] 4. Rubber sheets are installed on the side panels and movable vertical panels, and films are installed during pouring to double ensure the sealing of the pouring process and prevent leakage from causing rust on the connectors and affecting the performance of the specimen. At the same time, the casting surfaces of the movable vertical panels, side panels, and vertical panels of the rear-end traction mechanism are smooth and flat, ensuring the quality of specimen pouring;

[0041] 5. The mold base is installed at the bottom to cast the sample structure surface, which can ensure the casting density of the structure surface;

[0042] 6. Concrete and other materials produce a significant expansion effect within a period of time after pouring. The rigidity of the mold side plate is improved by installing a certain number of support frames.

[0043] 7. The definition of the length dimension of the mold assembly unit achieves the efficiency of simultaneous casting of upper and lower plate samples and optimizes the amount of mold steel used. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is the main view of a mold for making ultra-wide and continuous size specimens.

[0045] Figure 2 This is a top view of a mold for making ultra-wide and continuous-size specimens.

[0046] Figure 3 This is the left view of a mold for making ultra-wide and continuous-size specimens.

[0047] Figure 4 It is the main view of the front-end traction mechanism.

[0048] Figure 5 It is the left view of the front end traction mechanism.

[0049] Figure 6 It is the main view of the assembly unit.

[0050] Figure 7 It is the left side view of the assembly unit.

[0051] Figure 8 It is the right side view of the clamping mechanism of the assembly unit.

[0052] Figure 9 It is a top view of the stepless width adjustment mechanism.

[0053] Figure 10 This is the main view of the width stepless adjustment mechanism.

[0054] Figure 11 This is the main view of the stepless adjustment block of the width stepless adjustment mechanism.

[0055] Figure 12 It is the main view of the connection locking mechanism. DETAILED DESCRIPTION

[0056] The present invention will be further described below with reference to the accompanying drawings.

[0057] Reference Figures 1 to 12, a mold for making ultra-wide continuous-size specimens, the mold comprising a front-end traction mechanism 1, an assembly unit 2, a connecting and locking mechanism 3, a rear-end traction mechanism 4, and a stepless width adjustment mechanism 5. A certain number of assembly units are installed between the front-end traction mechanism 1 and the rear-end traction mechanism 4. The assembly unit 2, the front-end traction mechanism 1, and the rear-end traction mechanism 4 are connected by a connecting and locking mechanism 3. The stepless width adjustment mechanism 5 is installed in the front-end traction mechanism 1 and the assembly unit 2 connected thereto. The assembly units 2 are tightly connected with each other using flexible rubber sheets. The mold blank is placed in the working space inside the area surrounded by the stepless width adjustment mechanism 5, the rear-end traction mechanism 4, and each assembly unit 2.

[0058] The length dimensions of the assembly unit in this embodiment are defined as follows:

[0059] 1) Determine the size requirements for the upper and lower plate specimens for the test. Define the length range of ultra-wide continuous size specimens as [10cm, 350cm], where the specimen width is 50cm. During production, the upper and lower plate specimens are required to be cast together. The length interval of the upper plate specimen with continuous size is 10cm. The length of the lower plate specimen is at least 20% longer than that of the upper plate specimen and must be a multiple of 10cm. Small-size specimens below 50cm are cast more frequently.

[0060] 2) Define the range of the assembly unit reference length L0, which satisfies 50cm≤L0≤80cm and is an integer, and take L0=L min +p△L, the reference length that meets the requirements is L0=[50, 60, 70, 80];

[0061] 3) Define the number of assembly units with a length of reference length L0, satisfying x = L max / L0, we get x = [7.00, 5.83, 5.00, 4.38]. Based on the principle of minimizing the amount of steel used in the length direction of the mold, we select the two optimal solutions x = [7.00, 5.00], and the corresponding L0 = [50, 70];

[0062] 4) Define the length of each assembly unit. The length of each assembly unit is n times the reference length. The lengths are arranged from small to large as L = [L1, L2, L3, ...]. When L0 = 50 cm, there are three solutions for L = [L1, L2]: [50, 300], [100, 250], and [150, 200]. There are two solutions for L = [L1, L2, L3]: [50, 100, 200] and [100, 100, 150]. When L0 = 70 cm, there are two solutions for L = [L1, L2]: [70, 280] and [140, 210]. There is one solution for L = [L1, L2, L3]: [70, 140, 140]. Based on the principle of satisfying the minimum number of assembly units, combinations of other numbers of assembly units are not considered.

[0063] 5) According to the requirement of pouring the upper and lower plate samples at the same time, in order to meet the pouring frequency and operation convenience of the sample size less than 100 cm, at least one assembly unit is 100 cm or slightly longer than 100 cm. Then [50, 300], [150, 200], [150, 200], [70, 280], [140, 210] and [70, 140, 140] can be removed, leaving [100, 250], [50, 100, 200] and [100, 100, 150] to select one scheme. According to the principle of the shortest cumulative length of the assembly units, by counting the number of upper and lower plates poured at the same time, when [L1, L2, L3] = [50, 100, 200] You can choose L1 as 1, L2 as 2, and L3 as 2. When [L1, L2] = [100, 250], the number of L1 is 2, and the number of L2 is 2. When [L1, L2, L3] = [100, 100, 150], the number of L1 is 2, the number of L2 is 2, and the number of L3 is 2. The latter two require 50 cm more mold steel in the length direction, and considering that [L1, L2, L3] = [50, 100, 200] is more convenient for casting specimens below 50 cm, it is more appropriate to select [L1, L2, L3] = [50, 100, 200], and determine L0 = 50, [L1, L2, L3] = [50, 100, 200].

[0064] Furthermore, the front-end traction mechanism 1 includes a pull rod 11, a vertical plate 12, a turntable 13, a screw 14, a base 15, a connecting ring 16, a wheel 17 and a pressure plate 18. Four wheels 17 are installed at the bottom of the base 15. The vertical plate 12 is composed of a vertical plate and reinforcing ribs on both sides. The vertical plate 12 is installed on the right side above the base 15 along the direction of wheel movement. The vertical plate of the vertical plate 12 is aligned with the right side of the base 15. A hole is provided below the vertical plate to facilitate adjustment of the width stepless adjustment mechanism 5. The pull rod 11 is fixed on the left side above the base 15, and the connecting ring 16 is installed on the left side of the base 15. The upper end of the screw 14 is connected to the turntable 13, and the lower end of the screw 14 is connected to the pressure plate 18. The screw 14 vertically passes through the base 15 to form a threaded transmission.

[0065] Furthermore, the assembly unit 2 includes a support frame 21, side panels 22, rubber sheets 23, a clamping mechanism 24 and a chassis 25. Four wheels are installed at the bottom of the chassis 25. There is a raised platform in the middle position above the chassis 25. The mold base can be placed above the raised platform. There is a raised baffle on both sides of the chassis 25 close to the wheel. The two side panels 22 are respectively placed on both sides of the raised platform or the mold base. A clamping mechanism 24 is installed between the raised baffle and the side panel 22. Rubber sheets 23 are installed at both ends of the side panel 22 and the raised platform of the chassis 25. The support frame 21 is installed directly above the two side panels and can be tightened by eye bolts. The clamping mechanism 24 includes a handwheel with a screw 241, a fixed seat 242 and a clamping block 243. The fixed seat 242 rests on the inner side of the raised baffle. The clamping block 243 is installed above the fixed seat 242 and moves along it in a limited direction. The screw portion of the screw handwheel 241 passes through the fixed seat 242 and forms a threaded transmission. The end of the screw portion with the screw handwheel 241 can directly contact one side of the clamping block 243.

[0066] Furthermore, the width stepless adjustment mechanism 5 includes a stepless adjustment block 51, a standard support block 52, a movable vertical plate 53 and a limit frame 54. The stepless adjustment block 51 includes a lifting ring 511, a fixed plate 512, a screw 513, a guide rod 514 and an adjustment plate 515. The fixed plate 512 is embedded in the vertical plate 12 of the front-end traction mechanism 1 and fixed. The guide rods 514 are installed at the four corners of the fixed plate 512. The adjustment plate 515 passes through the guide rod 514 and can move along it. The screw 513 passes through the middle of the fixed plate 512 and forms a threaded connection and transmission. The end of the screw contacts the adjustment plate 515 and moves it. Rubber sheets are installed on both sides of the movable vertical plate 53. The movable vertical plate 53 is placed directly above the raised platform of the chassis 25 of the assembly unit 2. A certain number of standard support blocks 52 are arranged between the stepless adjustment block 51 and the movable vertical plate 53 and are placed above the raised platform of the chassis 25. The length of the standard support block 52 is generally set to △L of the continuous sample length interval or a multiple thereof. The upper part of the movable vertical plate 53 passes through the hollow structure of the limit frame 54 and is fixed. The two ends of the limit frame 54 are fixed to the side plate 22 of the assembly unit 2 by eye bolts. The stepless adjustment block 51 and the standard support block 52 are installed with lifting rings 511 for lifting.

[0067] Compared with the front-end traction mechanism 1 , the rear-end traction mechanism 4 has the same structural composition except for the vertical plate. The surface of the vertical plate of the rear-end traction mechanism 4 is smooth and flat.

[0068] The connection locking mechanism 3 includes a left fixed plate 31, a pin 32, a rotating bolt 33, a right fixed plate 34, a nut 35 and a bolt 36. The left fixed plate 31 and the right fixed plate 34 are respectively fixed between adjacent assembly units or near the intersection between the assembly units and the traction mechanism by bolts 36. The pin 32 passes through the two protrusions of the left fixed plate 31. The sleeve end of the rotating bolt 33 passes through the pin 32 and causes the screw end to rotate around it. After the screw end is rotated between the two protrusions of the right fixed plate 34, it can be fixed in place with a nut 35 and a gasket.

[0069] The base 15 of the front traction mechanism 1, the rear traction mechanism 4 and the chassis 25 of the assembly unit 2 are provided with a concave-convex structure, and the assembly unit 2 or the assembly unit 2 and the front and rear traction mechanisms are locked with a pin after being aligned through the concave-convex structure.

[0070] A method for producing ultra-wide continuous-size specimens, based on the mechanical structure of the above components, includes the following steps:

[0071] (1) According to the size of the upper and lower plates of the casting sample, select the corresponding assembly units 2 and move them together with the front and rear end traction mechanisms to the designated positions;

[0072] (2) The chassis 25 of the assembly unit 2 and the base 15 of the front and rear end traction mechanism are connected and tightened, and the stepless adjustment block 51 of the width stepless adjustment mechanism 5 is adjusted according to the length and size requirements of the specimen. Then, a certain number of standard support blocks 52 are installed, and the movable vertical plate 53 is installed. The turntable 13 of the front and rear end traction mechanism 1 is adjusted so that the pressure plate 18 presses the ground to prevent the wheels from rotating. During this period, if the continuous size specimens meet the regular interval size progressive method, the stepless adjustment block 51 is not required;

[0073] (3) Install the mold base onto the raised platform of the assembly unit 2, install the side panels 22 of the assembly unit 2, and connect and secure them using the connection and locking mechanism 3. Use the pressing mechanism 24 to press each side panel 22 onto the two sides of the mold base. Install the limit frame 54 of the stepless width adjustment mechanism 5 and secure the upper end of the movable vertical panel 53 to the side panel.

[0074] (4) Place a film inside the area surrounded by the movable vertical plate 53 of the width stepless adjustment mechanism 5, the vertical plate of the rear end traction mechanism 4, the side plate 22 of the assembly unit 2, and the mold base, and pour the stirred concrete. After pouring, use a stirring rod to mix and smooth it.

[0075] (5) Install a certain number of support frames 21 above the side panels 22 of each assembly unit 2 to enhance rigidity;

[0076] (6) The casting method of the upper and lower plate specimens is the same. When removing the mold, first unscrew the pressing mechanism 24 of the assembly unit 2 and the stepless adjustment block 51 of the shortened width stepless adjustment mechanism 5, and then remove the support frame 21, the connecting locking mechanism 3 and the side plate 22;

[0077] (7) Select the traction mode of the front and rear traction mechanism 1 according to the weight of the sample, adjust the turntable 13 of the front and rear traction mechanism 1 so that the pressure plate 18 is off the ground to facilitate the rotation of the wheels. If the sample is light, manually pull or push the pull rod 11 of the front and rear traction mechanism to the specified position. If the sample is heavy, use a flatbed truck or forklift or other power device to connect to the connecting ring 16 and pull the sample to the specified position;

[0078] (8) Remove the sample, disassemble, clean and return all mechanisms to their original positions.

[0079] The embodiments of this specification are merely examples of implementations of the invention and are provided for illustrative purposes only. The scope of protection of the present invention should not be considered limited to the specific embodiments described in these embodiments. The scope of protection of the present invention also extends to equivalent technical means that can be conceived by a person of ordinary skill in the art based on the invention.

Claims

1. A mold for making ultra-wide continuous size specimens, characterized in that: The manufacturing mold includes a front-end traction mechanism, an assembly unit, a connecting and locking mechanism, a rear-end traction mechanism, and a stepless width adjustment mechanism. A certain number of assembly units are installed between the front-end traction mechanism and the rear-end traction mechanism. The assembly units, the front-end traction mechanism, and the rear-end traction mechanism are connected by a connecting and locking mechanism. The stepless width adjustment mechanism is installed in the front-end traction mechanism and the assembly units connected thereto. Flexible rubber sheets are used to press and dock the assembly units. The area enclosed by the stepless width adjustment mechanism, the rear-end traction mechanism, and the assembly units is a working space for placing the mold base. The assembly unit includes a support frame, side panels, a rubber sheet, a clamping mechanism and a chassis, four wheels are installed at the bottom of the chassis, a raised platform is located in the middle position above the chassis, a mold base is placed above the raised platform, a raised baffle is provided on both sides of the chassis close to the wheel, the two side panels are placed on both sides of the raised platform or the mold base, a clamping mechanism is installed between the raised baffle and the side panels, rubber sheets are installed at both ends of the side panels and the raised platform of the chassis, the support frame is installed just above the two side panels and is tightened by eye bolts, the clamping mechanism includes a screw handwheel, a fixing seat and a clamping block, the fixing seat relies on the inner side of the raised baffle, the clamping block is installed above the fixing seat and moves along it in a limited direction, the screw portion with the screw handwheel passes through the fixing seat and forms a threaded transmission, and the end of the screw portion with the screw handwheel directly contacts one side of the clamping block; Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion.

2. A mold for making ultra-wide and continuous-size specimens according to claim 1, characterized in that: The front-end traction mechanism and the rear-end traction mechanism both include a pull rod, a vertical plate, a turntable, a screw, a base, a connecting ring, a wheel and a pressure plate. Four wheels are installed at the bottom of the base. The vertical plate is composed of a vertical plate and reinforcing ribs on both sides. The vertical plate is installed on the right side above the base along the direction of wheel movement. The vertical plate of the vertical plate is aligned with the right side of the base. A hole is provided below the vertical plate to facilitate adjustment of the width of the stepless adjustment mechanism. The pull rod is fixed on the left side above the base, and the connecting ring is installed on the left side of the base. The upper end of the screw is connected to the turntable, and the lower end of the screw is connected to the pressure plate. The screw passes vertically through the base to form a threaded transmission.

3. A mold for making ultra-wide continuous size specimens as claimed in claim 2, characterized in that: The surface of the vertical plate of the rear end traction mechanism is a smooth and flat surface.

4. A mold for making ultra-wide continuous size specimens according to claim 1 or 2, characterized in that: The connection locking mechanism includes a left fixed plate, a pin, a rotating bolt, a right fixed plate, a nut and a bolt. The left fixed plate and the right fixed plate are respectively fixed between adjacent assembly units or near the junction between the assembly unit and the traction mechanism by bolts. The pin passes through the two protrusions of the left fixed plate, and the sleeve end of the rotating bolt passes through the pin and causes the screw end to rotate around it. After the screw end is rotated between the two protrusions of the right fixed plate, it is fixed in place with a nut and a gasket.

5. A mold for making ultra-wide and continuous-size specimens according to claim 1 or 2, characterized in that: The bases of the front and rear traction mechanisms and the chassis of the assembly unit are provided with concave-convex structures. The assembly unit or the assembly unit and the front and rear traction mechanisms are aligned through the concave-convex structures and locked with pins.

6. A mold for making ultra-wide and continuous-size specimens according to claim 1 or 2, characterized in that: In the assembly unit, the length dimension is defined as follows: 1) Determine the size requirements of the upper and lower plate specimens for the test, and define the length range of the ultra-wide continuous size specimen as [L min , L max ], the width of the specimen is W, the length interval of the specimens of consecutive sizes is △L, and the pouring frequency of specimens of different sizes is determined; 2) Define the assembly unit reference length L0, taking L0=L min +p△L and satisfy W≤L0≤aW, where p is an integer, a≥1, a is related to the adjustment range and convenience of the width stepless adjustment mechanism, and the reference length that meets the requirements is L0=[L 01 , L 02 ,…,L 0m ], where m is the maximum number of conditions that meet the requirements; 3) Define the number of assembly units with a length of reference length L0, satisfying x =L max / L0, obtain x =[ x 1, x 2,…, x m ], keep two decimal places for each value, select x The first digit after the decimal point of the value is greater than 8 or 0. x If the first digit after the decimal point is 0, it is the optimal solution. If it does not exist, select the solutions with the two decimal places closest to 99. The sum of the optimal solution and other solutions does not exceed 5. At this time, the corresponding solution is obtained. x L0 value; 4) Define the length of each assembly unit. The length of each assembly unit is n times the reference length, where n is an integer. 5) Determine the optimal solution to meet the requirements of simultaneous pouring of upper and lower plate specimens, based on the principle of meeting the pouring frequency and operation convenience of small-size specimens and the shortest cumulative length of assembly units. Determine the optimal length solution of each assembly unit and L1, L2, ..., L through a list or other form. x The number of 7. A method for making a mold for ultra-wide and continuous-size specimens as claimed in claim 1, characterized in that: The method comprises the following steps: Step (1) According to the sizes of the upper and lower plates of the casting sample, the corresponding assembly units are selected and moved to the designated positions together with the front and rear end traction mechanisms; Step (2) Connect and tighten the chassis of the assembly unit and the base of the front and rear end traction mechanism, adjust the stepless adjustment block of the width stepless adjustment mechanism according to the length and size requirements of the specimen, then install a certain number of standard support blocks, install the movable vertical plate, and adjust the turntable of the front and rear end traction mechanism so that the pressure plate presses the ground to prevent the wheel from rotating. If the continuous size specimens meet the regular interval size progressive method, the stepless adjustment block is not required; Step (3) Install the mold base onto the raised platform of the assembly unit, install the side panels of the assembly unit, and connect and secure them with a connecting locking mechanism, press each side panel to the two sides of the mold base with a pressing mechanism, install the limit frame of the stepless width adjustment mechanism and secure the upper end of the movable vertical panel to the side panel; Step (4) placing a film inside the area surrounded by the movable vertical plate of the width stepless adjustment mechanism, the vertical plate of the rear end traction mechanism, the side plates of the assembly unit and the mold base, pouring the stirred concrete, and mixing and smoothing it with a stirring rod after pouring; Step (5) installing a set number of support frames above the side panels of each assembly unit to enhance rigidity; Step (6) The casting method of the upper and lower plate specimens is the same. When removing the mold, first unscrew the pressing mechanism of the assembly unit and the stepless adjustment block of the shortening width stepless adjustment mechanism, and then remove the support frame, connecting the locking mechanism and the side plate; Step (7) Select the traction mode of the front and rear end traction mechanisms according to the weight of the sample, adjust the turntables of the front and rear end traction mechanisms so that the pressure plates are off the ground to allow the wheels to rotate, and if the sample is light, manually pull or push the pull rods of the front and rear end traction mechanisms to the specified position; if the sample is heavy, connect the sample to the specified position by a power device such as a flatbed truck or forklift and then connect it to the connecting ring; Step (8) Take out the sample, disassemble, clean and return all the mechanisms to their original positions.

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