Concrete test block demolding device

Abstract

The utility model belongs to the technical field of building construction, and particularly relates to a concrete test block demolding device which comprises a manual hydraulic pump and a hydraulic cylinder connected with the manual hydraulic pump through an oil way, the device further comprises two parallel transverse supporting plates which are arranged at the same height, and supporting mechanisms used for bearing the hydraulic cylinder are arranged on the bottom faces of the two ends of each transverse supporting plate. The side supporting plates are perpendicular to the transverse supporting plates, and the two ends of each side supporting plate penetrate through the horizontal sliding ways of the two transverse supporting plates in a sliding mode respectively. An adjusting sliding way is formed in a plate body of the temple plate in the length direction of the temple plate, ejector blocks are arranged on the upper plate face and the lower plate face of the two ends of the temple plate in a sliding mode, the ejector blocks corresponding up and down are connected through connecting plates penetrating through the adjusting sliding way, a sliding rod sleeved with a limiting spring is located in the adjusting sliding way, and the two ends of the sliding rod sequentially penetrate through the corresponding connecting plates and then are connected with the two ends of the adjusting sliding way. The hydraulic demolding device is simple in structure and suitable for demolding operation of test molds of various specifications, meanwhile, the hydraulic demolding process is controllable, and the demolding efficiency and effect are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, and particularly relates to a demoulding device for concrete test blocks. Background Art

[0002] In modern concrete technology research and application, the compressive strength test is one of the essential links. Therefore, it is necessary to use a test mold to form the mixed concrete into test blocks with dimensions conforming to the test standards, and then conduct the compressive strength test on the test blocks. The process of separating the concrete test block from the test mold is called demoulding. For split cast steel test molds, only disassembling the test mold can complete the demoulding. However, for integrally formed plastic test molds, the demoulding operations are mainly divided into demoulding by air compressor, manual demoulding, and hydraulic demoulding: Demoulding by air compressor is to introduce high-pressure air into the test mold through the through holes at the bottom of the test mold to expand the gap between the inner wall of the test mold and the outer wall of the test block and achieve demoulding. It causes less physical damage to the test block, but has the disadvantages of high energy consumption and difficult equipment transportation. Manual and hydraulic demoulding rely on human or hydraulic cylinder acting on the ejector rod, so that the ejector rod is inserted through the through hole at the bottom of the test mold and forcibly ejects the test block from the test mold. However, there are many operation errors in manual demoulding and it is easy to cause damage to the test block. In hydraulic demoulding, the force applied to the ejector rod is not easy to control, which is likely to cause the test block to fly off. At the same time, different specifications of limiting facilities need to be used for different types of test molds to achieve the effect of limiting the test mold and ejecting the test block. Content of the Utility Model

[0003] Aiming at the deficiencies existing in the prior art, the purpose of the utility model is to provide a demoulding device for concrete test blocks. The structure of the utility model is simple, which can be applicable to the demoulding operations of test molds with various specifications. At the same time, the hydraulic demoulding process is controllable, improving the demoulding efficiency and effect.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A demoulding device for concrete test blocks includes a manual hydraulic pump and a hydraulic cylinder connected to the manual hydraulic pump through an oil circuit. The device also includes two horizontally supported plates arranged in parallel and at the same height. Support mechanisms for carrying the hydraulic cylinder are provided at the bottom surfaces of both ends of the horizontally supported plates;

[0006] Horizontal sliding grooves are opened at both ends of the horizontally supported plates. Side support plates are vertically arranged with respect to the horizontally supported plates, and both ends of the side support plates respectively slide through the horizontal sliding grooves of the two horizontally supported plates;

[0007] An adjustment sliding groove is opened along the length direction of the plate body of the side support plate. Top blocks are slidably arranged on the upper and lower plate surfaces at both ends of the side support plate. The upper and lower corresponding top blocks are connected by a connecting plate passing through the adjustment sliding groove. A sliding rod sleeved with a limiting spring is located in the adjustment sliding groove and sequentially passes through the corresponding connecting plates at both ends and then is connected to both ends of the adjustment sliding groove.

[0008] Preferably, the top block is arranged flush with the plate surface of the corresponding cross brace plate.

[0009] Preferably, both ends of the limiting spring abut against the corresponding connecting plates and are always in a compressed state.

[0010] Preferably, anti-slip rubber cushions are provided on the corresponding side surfaces of the two side brace plates.

[0011] Preferably, the support mechanism includes legs arranged at the bottom surfaces of both ends of the cross brace plates. Between the legs on the same side of the two cross brace plates, there are two insertion rods arranged vertically. The two insertion rods at the same height are connected by a horizontal brace plate arranged parallel to the cross brace plates. The four horizontal brace plates form a support structure for clamping the cylinder barrel of the hydraulic cylinder, and the output end of the hydraulic cylinder is exposed at the gap between the two upper horizontal brace plates above it.

[0012] Preferably, universal wheels are provided at the bottoms of the legs, and the insertion rods are in sliding fit with the through holes preset on the legs; adjusting screws are also provided at both ends of the cross brace plates. The adjusting screws are provided with two threaded sections with opposite thread directions and are respectively screwed with the threaded holes preset on the corresponding cross brace plates; one end of each of the two adjusting screws is bent, and a driving sprocket is fixedly sleeved on the other end. A driven sprocket is provided at one end of the other adjusting screw, and the driving sprocket and the driven sprocket form a sprocket drive through a chain.

[0013] The working process of the present utility model is as follows:

[0014] First, adjust the positions of the cross brace plates and the side brace plates according to the specifications of the test mold. Taking a square test mold of 100mm * 100mm * 100mm as an example:

[0015] Circumferentially rotate the adjusting screw installed with the driving sprocket, and through the sprocket drive, the adjusting screw installed with the driven sprocket also rotates synchronously in the same direction, thereby realizing the opposite or back-to-back movement of the two cross brace plates. When the distance between the cross brace plates reaches 100mm (that is, the plate surface of the cross brace plate can block the test mold template but cannot block the test block), then overcome the elastic force of the limiting spring to make the stoppers at both ends of the side brace plates move towards each other, and move the side brace plates along the horizontal slideway so that the distance between the two side brace plates reaches 100mm, but the distance between the anti-slip rubber cushions of the two side brace plates is less than 100mm (that is, the stoppers can block the test mold template but cannot block the test block, but the anti-slip rubber cushions will rub against the test block). Then, the two stoppers return to the state of abutting against the cross brace plates under the action of the limiting spring, preventing the side brace plates from displacing relative to the cross brace plates. At the same time, the bottom surface of the stopper is flush with the bottom surface of the cross brace plate, which can effectively abut against the side plate of the test mold.

[0016] When the cross bracing plate moves, the insertion rod slides within the through hole of the support leg while maintaining its own position and the hydraulic cylinder without displacement. At the same time, the output end of the hydraulic cylinder always corresponds to the center point of the gap between the cross bracing plate and the side bracing plate assembly. A push rod with a suitable outer diameter is coaxially connected to the output end of the hydraulic cylinder. Then, the test mold with the built-in test block is correspondingly placed below the gap between the cross bracing plate and the side bracing plate assembly, and the insertion rod is inserted through the through hole at the bottom of the test mold. Then, the hydraulic cylinder can be pumped with oil through a manual hydraulic pump, causing the insertion rod to continuously insert into the test mold and push the test mold upward. When the top side wall of the test mold touches the top block of the cross bracing plate and the side bracing plate, the test mold is limited, but the test block is still pushed outward by the insertion rod, thus realizing the separation of the test block and the test mold. At the same time, when the test block is removed from the test mold, it will be affected by the friction of the resistance increasing rubber cushion layer, preventing the phenomenon that the test block is violently ejected due to the sudden decrease in the friction between the test block and the test mold while the push rod still rapidly moves upward in the later stage of demolding.

[0017] Of course, after the test block is demolded, the hydraulic cylinder is controlled to drive the push rod to reset, and then the demolding operation of the next test block can be carried out.

[0018] Compared with the prior art, the utility model has the following advantages: the structure of the utility model is simple, it can be applicable to the demolding operations of test molds of various specifications, and at the same time, the hydraulic demolding process is controllable, improving the demolding efficiency and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the concrete test block demolding device described in the specific embodiment;

[0020] Figure 2 is Figure 1 an enlarged structural diagram of part A in

[0021] Figure 3 is Figure 1 a schematic structural diagram of the top block at one end of the side bracing plate shown in SPECIFIC EMBODIMENT

[0022] In order to make the purpose, technical solutions and advantages of the utility model clearer, the following further describes the utility model in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0023] As shown in Figure 1-2As shown in the figure, a demoulding device for concrete test blocks includes a manual hydraulic pump (not shown in the figure) and a hydraulic cylinder 2 connected to the manual hydraulic pump through an oil circuit. The device further includes two horizontally arranged cross braces 1 with the same height. Support mechanisms for carrying the hydraulic cylinder 2 are provided on the bottom surfaces at both ends of the cross braces 1. The support mechanism includes legs 11 provided on the bottom surfaces at both ends of the cross braces 1, and universal wheels 12 are provided at the bottoms of the legs 11. Two vertically arranged inserting rods 11 are provided between the legs 11 on the same side of the two cross braces 1. The inserting rods 11 are slidably matched with through holes preset on the legs 11, and the two horizontally arranged cross braces 1 are connected by a horizontal brace 14. The four horizontal braces 14 form a support structure for clamping the cylinder barrel of the hydraulic cylinder, and the output end of the hydraulic cylinder is exposed at the gap between the two upper horizontal braces 14 above it;

[0024] Adjusting screws 3 are further provided at both ends of the cross braces 1. The adjusting screws 3 are provided with two thread segments with opposite thread directions and are respectively screwed with screw holes preset on the corresponding cross braces 1. One end of each of the two adjusting screws 3 is bent, and a driving sprocket 31 is fixedly sleeved on the other end. A driven sprocket 33 is provided at one end of the other adjusting screw 3. The driving sprocket 31 and the driven sprocket 33 form a sprocket drive through a chain 32.

[0025] Horizontal slides 15 are provided at both ends of the cross braces 1. Side braces 4 are vertically arranged with respect to the cross braces 1, and both ends of the side braces 4 respectively slide through the horizontal slides 15 of the two cross braces 1. Anti-slip rubber cushions 44 are provided on the corresponding side surfaces of the two side braces 4;

[0026] Adjusting slides 41 are provided along the length direction of the plate bodies of the side braces 4. Top blocks 42 are slidably provided on the upper and lower plate surfaces at both ends of the side braces 4. The upper and lower corresponding top blocks 42 are connected by a connecting plate 45 passing through the adjusting slide 41. The top blocks 42 are arranged flush with the plate surfaces of the corresponding cross braces 1. A slide rod 46 sleeved with a limiting spring 43 is located in the adjusting slide 41 and sequentially passes through the corresponding connecting plates 45 at both ends and is connected to both ends of the adjusting slide 41. Both ends of the limiting spring 43 abut against the corresponding connecting plates 45 and are always in a compressed state.

[0027] The working process of the present utility model is as follows:

[0028] First, adjust the positions of the cross braces and the side braces according to the specifications of the test mold. Taking a 100*100*100 square test mold as an example:

[0029] Rotate the adjusting screw 3 of the driving sprocket 31 circumferentially, and through the sprocket drive, the adjusting screw 3 of the driven sprocket 33 is also synchronously rotated circumferentially, so as to realize the opposite or back-to-back movement of the two cross braces 1. When the distance between the cross braces 1 reaches 100 mm (that is, the plate surface of the cross brace 1 can block the test mold template but cannot block the test block), then overcome the elastic force of the limit spring 43 to make the stoppers 42 at both ends of the side brace 4 move towards each other, and move the side brace 4 along the horizontal slideway 15 so that the distance between the two side braces 4 reaches 100 mm, but the distance between the resistance-increasing rubber cushions 44 of the two side braces is less than 100 mm (that is, the stopper 42 can block the test mold template but cannot block the test block, but the resistance-increasing rubber cushion 44 will rub against the test block). Then the two stoppers 42 return to the state of abutting against the cross brace 1 under the action of the limit spring 43 to prevent the side brace 4 from displacing relative to the cross brace 1. At the same time, the bottom surface of the stopper 42 is flush with the bottom surface of the cross brace 1, which can effectively abut against the side plate of the test mold.

[0030] When the cross brace 1 moves, the insertion rod 13 slides relative to the through hole of the support leg 11 but keeps itself and the hydraulic cylinder 2 without displacement. At the same time, the output end of the hydraulic cylinder 2 always corresponds to the center point of the gap between the cross brace and the side brace. Select a push rod with a suitable outer diameter and connect it coaxially with the output end of the hydraulic cylinder 2. Then place the test mold with the test block inside corresponding to the gap below the cross brace 1 and the side brace 4, and insert the insertion rod through the through hole at the bottom of the test mold. Then, the manual hydraulic pump can be used to pump oil into the hydraulic cylinder 2, so that the insertion rod continuously inserts into the test mold and pushes the test mold upward. When the top side wall of the test mold abuts against the cross brace 1 and the stopper 42 of the side brace, the test mold is limited, but the test block is still pushed outwards by the insertion rod, so as to realize the separation of the test block and the test mold. At the same time, when the test block is removed from the test mold, it will be rubbed by the resistance-increasing rubber cushion 44, preventing the phenomenon that the test block is violently ejected due to the sudden decrease in the friction force between the test block and the test mold and the push rod still exerting force to push upward in the later stage of demolding.

[0031] Of course, after the test block is demolded, control the hydraulic cylinder 2 to drive the push rod to reset, and then the next test block demolding operation can be carried out.

Claims

1. A concrete specimen demoulding device, comprising a manual hydraulic pump and a hydraulic cylinder connected to the manual hydraulic pump through an oil circuit, characterized in that, The device further includes two horizontally supporting plates arranged in parallel and at the same height, and supporting mechanisms for carrying hydraulic cylinders are provided on the bottom surfaces at both ends of the horizontally supporting plates; Horizontal sliding grooves are formed at both ends of the horizontally supporting plates, and side supporting plates are arranged perpendicular to the horizontally supporting plates and slide through the horizontal sliding grooves of the two horizontally supporting plates at both ends respectively; Adjusting sliding grooves are formed along the length direction on the plate body of the side supporting plates, top blocks are slidably arranged on the upper and lower plate surfaces at both ends of the side supporting plates, the upper and lower corresponding top blocks are connected by a connecting plate penetrating through the adjusting sliding grooves, a sliding rod sleeved with a limiting spring is located in the adjusting sliding grooves and sequentially penetrates through the corresponding connecting plates at both ends and then is connected to both ends of the adjusting sliding grooves.

2. The concrete test block demoulding device according to claim 1, wherein The top blocks are arranged flush with the plate surfaces of the corresponding horizontally supporting plates at the same height.

3. The concrete test block demoulding device according to claim 1, characterized in that, Both ends of the limiting spring abut against the corresponding connecting plates and are always in a compressed state.

4. The concrete test block demoulding device according to claim 1, characterized in that, Resistance-increasing rubber cushions are provided on the corresponding side surfaces of the two side supporting plates.

5. The concrete test block demoulding device according to claim 1, characterized in that, The supporting mechanism includes legs arranged on the bottom surfaces at both ends of the horizontally supporting plates. Two inserting rods are arranged up and down between the legs on the same side of the two horizontally supporting plates. The two inserting rods at the same height are connected by a horizontal supporting plate arranged parallel to the two horizontally supporting plates. The four horizontal supporting plates form a supporting structure for clamping the cylinder barrel of the hydraulic cylinder, and the output end of the hydraulic cylinder is exposed at the gap between the upper two horizontal supporting plates above it.

6. The concrete test block demolding device according to claim 5, characterized in that, Universal wheels are provided at the bottoms of the legs, and the inserting rods are in sliding fit with through holes preset on the legs; Adjusting screws are further provided at both ends of the horizontally supporting plates. Two threaded sections with opposite thread directions are provided on the adjusting screws and are respectively screwed with screw holes preset on the corresponding horizontally supporting plates; One end of one of the two adjusting screws is bent, and a driving sprocket is fixedly sleeved on the other end. A driven sprocket is provided at one end of the other adjusting screw. The driving sprocket and the driven sprocket form a sprocket drive through a chain.

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