Mold filling and demolding device for concrete anti-permeability test piece

Abstract

The invention discloses a mold filling and demolding device for a concrete anti-permeability test piece, and belongs to the technical field of mold filling and demolding tools. The concrete anti-permeability test piece mold filling and demolding device comprises a test mold and a mounting ring fixedly arranged at the bottom of the test mold, and further comprises a limiting assembly used for limiting an anti-permeability test piece, the limiting assembly comprises a bearing disc, a limiting rod and a steel sleeve, and a plurality of through holes are vertically formed in the mounting ring; a plurality of through holes are formed in the steel sleeve, a plurality of limiting holes are vertically formed in the steel sleeve, the number of the through holes corresponds to the number of the limiting holes in a one-to-one mode, the number of the limiting rods corresponds to the number of the through holes in a one-to-one mode, and the limiting rods correspond to the through holes in a one-to-one mode. The impermeability test piece can be stably embedded into the test mold under the circumferential limiting of the plurality of limiting rods, so that a rubber band sleeving the impermeability test piece is prevented from rolling, and the accuracy of an experiment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of moulding and demoulding tools, in particular to a concrete anti-permeability test piece moulding and demoulding device. Background Art

[0002] The current fields of construction, roads and bridges, and concrete testing and research are all inseparable from the production of concrete anti-permeability test pieces. In order to obtain high-quality concrete anti-permeability test pieces, in addition to mixing the concrete well, the mold and demoulding method used for the anti-permeability test piece are also very important. The anti-permeability test piece should be tested using a frustum test mold with an upper inner diameter of 175mm and a lower inner diameter of 185mm.

[0003] The waterproof test piece needs to be placed in the waterproof test mold and installed on the waterproof instrument for pressurization for testing. In order to ensure the accuracy of the experiment, it needs to be sealed when placed in the test mold. The existing sealing methods include paraffin sealing method, cement and butter sealing method and rubber band sealing method. The use of paraffin sealing seriously pollutes the laboratory environment and even requires the operation to be carried out in a room equipped with an exhaust fan. The use of cement and butter sealing requires that the waterproof test piece be placed for more than 24 hours after installation before testing, which increases the test cycle. Therefore, the existing rubber band sealing method is usually adopted, in which a rubber band is put on the outside of the waterproof test piece, and then the waterproof test piece is pressed into the test mold by a hydraulic press. This method is simple, easy and pollution-free, but there are still some problems when pressing the waterproof test piece in. Due to the lack of a limit on the waterproof test piece, the waterproof test piece is subjected to uneven force when pressed in, causing the rubber band to roll over in the test mold, reducing the sealing effect. Moreover, when the waterproof test piece is subjected to uneven force, cracks will appear inside the waterproof test piece, thereby reducing the waterproof effect of the waterproof test piece. Summary of the Invention

[0004] The purpose of the present invention is to overcome the problems in the prior art and provide a concrete anti-permeability test piece mold loading and demoulding device, which can stably load the anti-permeability test piece into the test mold or remove it from the test mold.

[0005] The present invention provides a concrete anti-seepage test piece molding and demoulding device, comprising a test mold and a mounting ring fixedly arranged at the bottom of the test mold, and also comprising a limiting component for limiting the anti-seepage test piece, the limiting component comprising a bearing plate, a limiting rod and a steel sleeve, the inner diameter of the steel sleeve is larger than the outer diameter of the test mold, the outer diameter of the steel sleeve is the same as the outer diameter of the mounting ring, a plurality of through holes are vertically opened on the mounting ring, a plurality of limiting holes are vertically opened on the steel sleeve, the number of the through holes and the number of the limiting holes are arranged in a one-to-one correspondence, a plurality of limiting rods are provided, and the plurality of limiting rods and the plurality of through holes are arranged in a one-to-one correspondence. The holes are arranged in a one-to-one correspondence and are vertically fixed on the bottom of the carrying plate. The inner diameter of the limiting hole is larger than the inner diameter of the through hole. A clamping assembly is provided in several of the limiting holes. The clamping assembly is used to clamp the limiting rod when the limiting rod is inserted into the limiting hole. The water-resistance test piece is placed in the test mold, and the limiting rod is then sequentially passed through the through hole and the limiting hole. At this time, the carrying plate is fitted with the top of the water-resistance test piece. Several of the through holes, several of the limiting holes, and several of the limiting rods are arranged in an array along the axis of the steel sleeve. A protrusion is fixedly connected to the middle of the bottom side of the carrying plate.

[0006] Preferably, a steel limiting ring is fixedly provided on the inner side of the steel sleeve, and the test mold is fitted with the steel limiting ring.

[0007] Preferably, the clamping assembly includes an arc-shaped clamping plate, a telescopic rod and a spring, the arc-shaped clamping plate is arranged as a pair, a pair of the arc-shaped clamping plates are vertically arranged in the limiting holes, the side of the pair of arc-shaped clamping plates away from each other is fixedly connected with a horizontally arranged telescopic rod, one end of the telescopic rod is fixedly connected to the steel sleeve, and a spring is sleeved on the pair of telescopic rods, one end of the spring is fixedly connected to the arc-shaped clamping plate, and the other end is fixedly connected to the steel sleeve.

[0008] Preferably, both ends of the arc-shaped clamping plate are obliquely fixedly connected with abutment plates.

[0009] Preferably, the depth of the limiting hole is smaller than the height of the limiting rod.

[0010] Preferably, the carrying plate, the protrusion and the limiting rod are all made of stainless steel.

[0011] Preferably, six limiting rods are provided and are evenly distributed circumferentially on the bottom of the carrying plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: when the mold installation and demoulding device designed by the present invention is used, the test mold is first placed in the steel sleeve, and the several through holes on the mounting ring correspond to the several limiting holes on the steel sleeve one by one, and the axes coincide in the vertical direction. At this time, the anti-seepage test piece is first placed on the mounting ring, and the anti-seepage test piece is now partially located in the test mold. Then, the several limiting rods are inserted into the through holes and the limiting holes in sequence, and the carrying plate is made to fit the top of the anti-seepage test piece. At this time, the anti-seepage test piece can be pressed into the test mold by applying pressure to the top of the carrying plate by a press. Moreover, since the several through holes, the several limiting holes and the several limiting rods are arranged in an array along the axis of the steel sleeve, it is ensured that the force-bearing surface of the test piece can be evenly stressed, and the rubber band set can be avoided from rolling due to uneven force on the anti-seepage test piece. Moreover, the uniform pressure below can also protect the anti-seepage test piece body, and avoid cracks inside the anti-seepage test piece due to uneven force, thereby reducing the anti-seepage effect of the test piece. When the experiment is completed and the water-resistance test piece needs to be removed from the test mold, the test mold only needs to be turned over and placed on the steel sleeve, and the limiting assembly is installed in the same way as above, and the protrusion set at the bottom of the supporting plate is in contact with the water-resistance test piece placed in the test mold. At this time, the supporting plate is pressurized by a press, and the protrusion will squeeze the water-resistance test piece, thereby pushing out a part of the water-resistance test piece placed in the test mold. Moreover, because the test mold is an existing standard steel test mold for water-resistance testers, its upper diameter is smaller than the lower diameter. When the protrusion pushes out a part of the water-resistance test piece, due to the larger lower diameter, the water-resistance test piece and the test mold are already loose and can be easily taken out. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the anti-seepage test piece of the present invention when it is molded.

[0014] Figure 2 It is a schematic diagram of the matching structure of the mounting ring and the trial mold of the present invention.

[0015] Figure 3 It is a schematic structural diagram of the clamping assembly of the present invention.

[0016] Figure 4 It is a schematic diagram of the top view of the internal components of the limiting hole of the present invention.

[0017] Figure 5 It is a schematic diagram of the matching structure of the steel sleeve and the test mold of the present invention.

[0018] Figure 6 This is a schematic diagram of the structure of the anti-seepage test piece of the present invention when it is demoulded.

[0019] Explanation of the accompanying drawings: 1. Test mold; 2. Mounting ring; 3. Limiting assembly; 31. Carrying plate; 32. Limiting rod; 33. Steel sleeve; 34. Through hole; 35. Limiting hole; 4. Protrusion; 5. Clamping assembly; 51. Arc-shaped clamping plate; 52. Telescopic rod; 53. Spring; 6. Steel limiting ring; 7. Abutment plate. DETAILED DESCRIPTION

[0020] The following is combined with Figures 1 to 6 In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with ordinary skills in the field to which the present invention belongs.

[0021] The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects. "Inside", "outside", "upper", "lower", "far", "near", "front", "back" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. The drawings in the present invention are not drawn strictly according to the actual scale. The specific size and quantity of each structure can be determined according to actual needs. The drawings described in the present invention are only structural schematic diagrams.

[0022] The present invention provides a concrete anti-permeability test piece mold and demoulding device, such as Figures 1 to 6As shown, it includes a test mold 1 and a mounting ring 2 fixedly arranged at the bottom of the test mold 1, and also includes a limiting component 3 for limiting the anti-permeability test piece. The limiting component 3 includes a carrying plate 31, a limiting rod 32 and a steel sleeve 33. The inner diameter of the steel sleeve 33 is larger than the outer diameter of the test mold 1, and the outer diameter of the steel sleeve 33 is the same as the outer diameter of the mounting ring 2. A plurality of through holes 34 are vertically opened on the mounting ring 2, and a plurality of limiting holes 35 are vertically opened on the steel sleeve 33. The number of through holes 34 and the number of limiting holes 35 are set in a one-to-one correspondence. A plurality of limiting rods 32 are set, and the plurality of limiting rods 32 and the plurality of through holes 34 correspond in a one-to-one correspondence. It is set up and fixed vertically at the bottom of the supporting plate 31. The inner diameter of the limiting hole 35 is larger than the inner diameter of the through hole 34. A clamping assembly 5 is provided in each of the limiting holes 35. The clamping assembly 5 is used to clamp the limiting rod 32 when the limiting rod 32 is inserted into the limiting hole 35. The water-resistance test piece is placed in the test mold 1, and the limiting rod 32 is sequentially passed through the through hole 34 and the limiting hole 35. At this time, the supporting plate 31 is fitted with the top of the water-resistance test piece. A plurality of through holes 34, a plurality of limiting holes 35, and a plurality of limiting rods 32 are all arranged in an array along the axis of the steel sleeve 33. A protrusion 4 is fixedly connected to the middle of the bottom side of the supporting plate 31.

[0023] When the mold installation and demoulding device designed by the present invention is used, the test mold 1 is first placed in the steel sleeve 33, and the plurality of through holes 34 on the mounting ring 2 are matched with the plurality of limiting holes 35 on the steel sleeve 33, and the axes coincide with each other in the vertical direction. At this time, the anti-seepage test piece is first placed on the mounting ring 2. At this time, the anti-seepage test piece is partially located in the test mold 1, and then the plurality of limiting rods 32 are sequentially inserted into the through holes 34 and the limiting holes 35, and the carrier plate 31 is aligned with the top of the anti-seepage test piece. Fit, at this time, the top of the carrier plate 31 is pressed by a press machine to press the anti-permeability test piece into the test mold 1, and because the plurality of through holes 34, the plurality of limiting holes 35, and the plurality of limiting rods 32 are arranged in an array along the axis of the steel sleeve 33, it is ensured that the force-bearing surface of the test piece can be evenly stressed to avoid the sleeved rubber band from rolling due to uneven force on the anti-permeability test piece, and the uniform pressure below can also protect the anti-permeability test piece body, avoid cracks inside the anti-permeability test piece due to uneven force, and reduce the anti-permeability effect of the test piece; When the experiment is completed and the water-resistance test piece needs to be removed from the test mold 1, the test mold 1 only needs to be turned over and placed on the steel sleeve 33, and the limiting assembly 3 is installed in the same way as above, and the protrusion 4 set at the bottom of the supporting plate 31 is in contact with the water-resistance test piece placed in the test mold 1. At this time, the supporting plate 31 is pressurized by a press, and the protrusion 4 will squeeze the water-resistance test piece, thereby pushing out a part of the water-resistance test piece placed in the test mold 1. Moreover, because the test mold 1 is the existing standard steel test mold 1 of the water-resistance instrument, its upper diameter is smaller than the lower diameter. When the protrusion 4 pushes out a part of the water-resistance test piece, the lower diameter is larger. At this time, the water-resistance test piece and the test mold 1 are loose and can be easily taken out. In the present invention, the supporting plate 31 has a diameter of 240mm and a thickness of 10mm, the protrusion 4 has a diameter of 170mm and a thickness of 50mm, and the limiting rod 32 has a diameter of 9mm and a length of 2100mm.

[0024] Preferably, Figure 5 As shown, a steel limiting ring 6 is fixedly provided inside the steel sleeve 33 , and the test mold 1 is fitted with the steel limiting ring 6 .

[0025] A steel limiting ring 6 is fixedly arranged on the inner side of the steel sleeve 33 to prevent the test mold 1 and the steel sleeve 33 from fitting too tightly when the press applies pressure to the carrier plate 31, resulting in the test mold 1 and the steel sleeve 33 being difficult to separate after the anti-permeability test piece is pressed into the test mold 1, which affects subsequent use.

[0026] Preferably, Figure 3~Figure 4 As shown, the clamping assembly 5 includes an arc-shaped clamping plate 51, a telescopic rod 52 and a spring 53. The arc-shaped clamping plate 51 is arranged as a pair. A pair of arc-shaped clamping plates 51 are vertically arranged in the limiting hole 35. A pair of arc-shaped clamping plates 51 are fixedly connected to a horizontally arranged telescopic rod 52 on one side away from each other. One end of the telescopic rod 52 is fixedly connected to the steel sleeve 33. A spring 53 is sleeved on the pair of telescopic rods 52. One end of the spring 53 is fixedly connected to the arc-shaped clamping plate 51, and the other end is fixedly connected to the steel sleeve 33. Both ends of the arc-shaped clamping plate 51 are obliquely fixedly connected to the abutment plate 7.

[0027] In the present invention, a clamping assembly 5 is provided in the limiting hole 35. Considering that a large number of through holes 34 and limiting holes 35 are provided, it takes a lot of time to align the through holes 34 with the limiting holes 35, and since several limiting rods 32 are fixedly connected to the bottom of the supporting plate 31, the difficulty of aligning the through holes 34 with the limiting holes 35 is further increased. Therefore, in the present invention, the inner diameter of the limiting hole 35 is made larger than the inner diameter of the through hole 34, which is more convenient for inserting the limiting rod 32. When the limiting rod 32 passes through the through hole 34 and is inserted into the limiting hole 35, it will squeeze the extrusion plate. As the limiting rod 32 gradually moves downward, it will squeeze a pair of arc-shaped clamping plates 51, and squeeze the telescopic rod 52 and the spring 53. The limiting rod 32 is stably clamped by a pair of springs 53 and a pair of arc-shaped clamping plates 51.

[0028] Preferably, the depth of the limiting hole 35 is smaller than the height of the limiting rod 32 .

[0029] The depth of the limiting hole 35 is smaller than the height of the limiting rod 32 . After the anti-seepage test piece is completely pressed in, the press can no longer exert pressure on the anti-seepage test piece, thereby fully protecting the anti-seepage test piece from being damaged.

[0030] Preferably, Figure 1 As shown, the carrying plate 31 , the protrusion 4 and the limiting rod 32 are all made of stainless steel.

[0031] In this embodiment, the concrete impermeability test specimens contain water, cement (alkaline substances), and other components during fabrication and testing. Furthermore, the specimens may be exposed to humid air or washing water during the test. Stainless steel, with its excellent corrosion resistance, effectively resists the erosion of alkaline substances in concrete and oxidation in humid environments, preventing structural damage or dimensional deformation due to rust, significantly extending the service life of the carrier plate 31, the bump 4, and the limiting rod 32.

[0032] The carrier plate 31 must withstand the press's load, and the limit rod 32 must remain vertically restrained during the pressurization process to prevent the test specimen from shifting. The high strength of stainless steel prevents plastic deformation (such as bending or denting) under high pressure, ensuring uniform pressure transmission from the carrier plate and stable positioning of the limit rod, thereby ensuring uniform force distribution across the test specimen (avoiding rubber band rolling or internal cracking).

[0033] The bump 4 is in direct contact with the surface of the water-resistance test piece (squeezing the water-resistance test piece during demoulding), and the limiting rod 32 needs to be frequently inserted / pulled out of the through hole 34 and the limiting hole 35, which can easily cause friction and wear during long-term use. The wear resistance of stainless steel can reduce the wear on the surface of the bump 4 (avoiding the dimensional deviation caused by wear affecting the demoulding effect), and at the same time prevent the gap between the limiting rod 32 and the hole from being too large due to wear (avoiding limit failure), thereby maintaining the operating accuracy of the device and the accuracy of the experiment. The surface of stainless steel is smooth and has no pores, and concrete residues, dust, etc. are not easy to adhere to. When cleaning, they can be removed by simply wiping, reducing the difficulty of maintenance. Especially in experiments, if the water-resistance test piece material remains on the surface of the carrier plate 31 or the limiting rod 32, it may affect the limit accuracy or pressure transmission uniformity. The easy-to-clean feature of stainless steel can effectively avoid such problems.

[0034] Preferably, Figure 1 As shown, six limiting rods 32 are provided and are evenly distributed circumferentially at the bottom of the carrying plate 31 .

[0035] In this embodiment, six limiting rods 32 are arranged and evenly and symmetrically distributed around the circumference to achieve a high degree of uniformity of force on the water-resistant test piece and constrained stability, thereby avoiding sealing failure or damage to the water-resistant test piece due to uneven force during the molding / demolding process; compared with 5 (asymmetric) or 4 (insufficient constraint), 6 is the optimal choice for balancing the "constraint effect" and "structural rationality".

[0036] The method for using the concrete anti-permeability test piece mold installation and demoulding device of the present invention is as follows: When the mold installation and demoulding device designed by the present invention is used, the test mold 1 is first placed in the steel sleeve 33, and the multiple through holes 34 on the mounting ring 2 are made to correspond one to one with the multiple limiting holes 35 on the steel sleeve 33, and the axes coincide in the vertical direction. At this time, the anti-permeability test piece is first placed on the mounting ring 2. At this time, the anti-permeability test piece is partially located in the test mold 1, and then the multiple limiting rods 32 are inserted into the through holes 34 and the limiting holes 35 in sequence. When the limiting rods 32 pass through the through holes 34 and are inserted into the limiting holes 35, the extrusion plates are squeezed. As the limiting rods 32 gradually move downward, the pair of arc-shaped clamping plates 51 are squeezed, and the telescopic rod 52 and the spring are squeezed. 53 is squeezed, and the limiting rod 32 is stably clamped by a pair of springs 53 and a pair of arc-shaped clamping plates 51; the carrying plate 31 is made to fit with the top of the anti-seepage test piece. At this time, the top of the carrying plate 31 is pressed by the press, so that the anti-seepage test piece can be pressed into the test mold 1. Moreover, since the plurality of through holes 34, the plurality of limiting holes 35, and the plurality of limiting rods 32 are arranged in an array along the axis of the steel sleeve 33, it is ensured that the force-bearing surface of the test piece can be uniformly stressed to avoid the sleeved rubber band from rolling due to the uneven force of the anti-seepage test piece. Moreover, the uniform pressure below can also protect the anti-seepage test piece body, avoid the internal cracks of the anti-seepage test piece due to uneven force, and reduce the anti-seepage effect of the test piece. When the experiment is completed and the water-resistance test piece needs to be removed from the test mold 1, the test mold 1 only needs to be turned over and placed on the steel sleeve 33, and the limit assembly 3 is installed in the same way as above, and the protrusion 4 set at the bottom of the supporting plate 31 is in contact with the water-resistance test piece placed in the test mold 1. At this time, the supporting plate 31 is pressurized by the press, and the protrusion 4 will squeeze the water-resistance test piece, thereby pushing out a part of the water-resistance test piece placed in the test mold 1. Moreover, because the test mold 1 is the existing standard steel test mold 1 of the water-resistance instrument, its upper diameter is smaller than the lower diameter. When the protrusion 4 pushes out a part of the water-resistance test piece, the lower diameter is larger. At this time, the water-resistance test piece and the test mold 1 are loose and can be easily taken out.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A concrete impermeability test piece molding and demoulding device, comprising a test mold (1) and a mounting ring (2) fixedly arranged at the bottom of the test mold (1), characterized in that: Also includes: A limiting assembly (3) is used to limit the anti-seepage test piece. The limiting assembly (3) includes a supporting plate (31), a limiting rod (32) and a steel sleeve (33). The inner diameter of the steel sleeve (33) is larger than the outer diameter of the test mold (1). The outer diameter of the steel sleeve (33) is the same as the outer diameter of the mounting ring (2). The mounting ring (2) is vertically provided with a plurality of through holes (34). The steel sleeve (33) is vertically provided with a plurality of limiting holes (35). The through holes (34) and the limiting holes (35) are arranged in a one-to-one correspondence. The limiting rods (32) are provided in a plurality of ways. The limiting rods (32) and the limiting holes (34) are arranged in a one-to-one correspondence. The limiting rods (32) are vertically fixed on the bottom of the supporting plate (31). The inner diameter of the limiting hole (35) is larger than the inner diameter of the through hole (34). A plurality of clamping assemblies (5) are provided, and the plurality of clamping assemblies (5) are respectively provided in the plurality of limiting holes (35) in a one-to-one correspondence, and the clamping assemblies (5) are used to clamp the limiting rod (32) when the limiting rod (32) is inserted into the limiting hole (35); The protrusion (4) is fixedly connected to the middle portion of the bottom side of the carrying plate (31).

2. A concrete anti-permeability test piece molding and demoulding device according to claim 1, characterized in that: A steel limiting ring (6) is fixedly provided on the inner side of the steel sleeve (33), and the test mold (1) is fitted with the steel limiting ring (6).

3. A concrete anti-permeability test piece molding and demoulding device according to claim 1, characterized in that: The clamping assembly (5) includes an arc-shaped clamping plate (51), a telescopic rod (52) and a spring (53). The arc-shaped clamping plate (51) is provided as a pair. The pair of arc-shaped clamping plates (51) are vertically provided in the limiting hole (35). The side of the pair of arc-shaped clamping plates (51) away from each other is fixedly connected to a horizontally provided telescopic rod (52). One end of the telescopic rod (52) is fixedly connected to the steel sleeve (33). The pair of telescopic rods (52) are both provided with a spring (53). One end of the spring (53) is fixedly connected to the arc-shaped clamping plate (51), and the other end is fixedly connected to the steel sleeve (33).

4. A concrete anti-permeability test piece molding and demoulding device according to claim 3, characterized in that: Both ends of the arc-shaped clamping plate (51) are obliquely and fixedly connected to abutment plates (7).

5. A concrete anti-permeability test piece molding and demoulding device according to claim 1, characterized in that: The depth of the limiting hole (35) is less than the height of the limiting rod (32).

6. A concrete anti-permeability test piece molding and demoulding device according to claim 1, characterized in that: The carrying plate (31), the protrusion (4) and the limiting rod (32) are all made of stainless steel.

7. A concrete anti-permeability test piece molding and demoulding device according to claim 1, characterized in that: Six limiting rods (32) are provided and are evenly distributed circumferentially on the bottom of the carrying plate (31).

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