Device for measuring permeability of concrete

Abstract

The utility model discloses a device for measuring the permeability of concrete, which comprises a rack and an adjusting assembly for adjusting the position of a concrete test block, the adjusting assembly comprises a frame, a connecting plate and a shaft, one end of the shaft is fixedly connected with the frame, the other end of the shaft is rotationally connected with the connecting plate, a damping rubber ring is arranged at the joint of the connecting plate and the shaft, and a net plate is fixedly connected to the bottom of the frame; according to the utility model, the accuracy of permeability measurement can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to concrete test technical field, especially relate to a device for determining the permeability of concrete. BACKGROUND

[0002] The permeability of concrete refers to the size, distribution and connectivity of the internal pores of concrete, and the interaction performance of concrete and external medium (such as water, gas, organic acid, etc.). The smaller the permeability of concrete is, the higher its durability is, and the water immersion method is usually used to determine the permeability, that is, the weight difference before and after the concrete test block is immersed in water is compared, so that the permeability is obtained, but this kind of way causes part of the area to be unable to fully contact with water due to the fixed position of the concrete test block in water, leading to the measurement error, and the present application provides a structure that can make the concrete test block contact with water uniformly. SUMMARY

[0003] In view of the defects of the prior art, the utility model provides a device for determining the permeability of concrete, which solves the above problems.

[0004] To achieve the above object, the utility model realizes the following technical scheme: a device for determining the permeability of concrete, comprising a rack, an adjusting assembly for adjusting the position of a concrete test block, a frame, a connecting plate and a shaft, one end of the shaft is fixedly connected with the frame, the other end of the shaft is rotatably connected with the connecting plate, a damping rubber ring is arranged at the connecting position of the connecting plate and the shaft, and a mesh plate is fixedly connected to the bottom of the frame.

[0005] Advantages

[0006] The utility model provides a device for determining the permeability of concrete, which has the following advantages compared with the prior art:

[0007] The user places the concrete test block on the net plate, then starts the motor, at this time the lead screw fixedly connected to the output shaft starts to rotate and drives the sliding rod fixedly connected thereto to start linear motion at the connection with the guide rod, the damping rubber strip arranged on the guide rod can effectively increase the damping of the frame sliding, so that the frame can slide smoothly, and the connecting plate fixedly connected to the sliding rod starts to slide synchronously, at this time the concrete test block placed on the frame can be immersed in water, after the concrete test block is soaked for a period of time, the user continues to start the motor, so that the frame continues to descend, at this time the gear is driven to slide onto the rack, then the user keeps the motor in the starting state, so that the gear starts to roll on the rack under the cooperation of the rack, and drives the shaft fixedly connected to the shaft to start synchronous rotation, at this time the frame starts to rotate at a constant speed under the cooperation of the shaft fixedly connected to the shaft, so as to adjust the angle, so that the cylindrical concrete test block can roll on the frame to adjust the position, avoid the part in contact with the net plate from being unable to be immersed in water, and when the test block rolls to the both ends of the frame, the buffer plate is pushed, so that the supporting rod starts to slide on the positioning rod in sliding connection with the supporting rod, and then starts to compress the spring fixedly connected to the supporting rod, so as to provide buffering for the test block rolling and avoid damage caused by impact. BRIEF DESCRIPTION OF DRAWINGS

[0008] Fig. 1 It is a three-dimensional structure schematic view of the utility model.

[0009] Fig. 2 It is a cross-sectional structure schematic view of the utility model.

[0010] Fig. 3 It is a whole structure schematic view of the utility model.

[0011] Mark annotation: rack 101, adjusting assembly 2, frame 201, connecting plate 202, shaft 203, sliding rod 204, lead screw 205, guide rod 206, motor 207, net plate 208, gear 209, rack 301, buffer plate 302, supporting rod 303, positioning rod 304, spring 305. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0013] The specific implementation of the utility model is described in detail below in combination with specific examples.

[0014] Please refer toFigs. 1-3 The utility model provides a kind of device for determining the permeability of concrete, including rack 101, still including:

[0015] Adjusting component 2 is used to adjust the position of concrete test block;

[0016] The adjusting component 2 includes frame 201, connecting plate 202 and shaft 203, one end of the shaft 203 is fixedly connected with the frame 201, the other end of the shaft 203 is rotatably connected with the connecting plate 202, damping rubber ring is equipped at the connecting place of the connecting plate 202 and the shaft 203, and the frame 201 is fixedly connected with mesh plate 208 at the bottom.

[0017] For the above example, those skilled in the art should know that the specific mesh plate 208 described in the above embodiment is not limited to the implementation of the above technical solution, for example, the mesh aperture on the mesh plate 208 is greater than 3CM, and the purpose of such setting is to facilitate the reduction of the contact area of the test block and the mesh plate 208 by such setting.

[0018] For the above example, those skilled in the art should know that the specific rack 101 described in the above embodiment is not limited to the implementation of the above technical solution, for example, the bottom of the rack 101 is provided with a water injection hole, and the purpose of such setting is to facilitate the injection of water into the rack 101 or the emptying of water in the rack 101 by such setting.

[0019] Specifically, the connecting plate 202 is fixedly connected with the sliding rod 204, the sliding rod 204 is threadedly connected with the lead screw 205, and the lead screw 205 is rotatably connected with the rack 101.

[0020] For the above example, those skilled in the art should know that the specific lead screw 205 described in the above embodiment is not limited to the implementation of the above technical solution, for example, the lead screw 205 can be a reciprocating lead screw, and the purpose of such setting is to facilitate the quick change of the movement direction of the sliding block by continuously controlling the same-direction rotation of the reciprocating lead screw when the sliding block threadedly connected thereon moves to one end.

[0021] Specifically, the sliding rod 204 is slidably connected with the guide rod 206, and the two guide rods 206 are symmetrically fixedly connected with the rack 101.

[0022] For the above example, those skilled in the art should know that the specific guide rod 206 described in the above embodiment is not limited to the implementation of the above technical solution, for example, the guide rod 206 is provided with a damping rubber strip, and the purpose of such setting is to facilitate the increase of the damping received by the sliding rod 204 sliding, so that the sliding rod 204 can slide smoothly.

[0023] Specifically, one end of the lead screw 205 is fixedly connected to the output shaft of the motor 207, and the motor 207 is fixedly connected to the rack 101.

[0024] For the above example, those skilled in the art should know that in the implementation of the above technical solutions, the specific motor 207 described in the above embodiment is not limited, for example, the motor 207 should be selected to have multiple gears and adjustable speed. The purpose of such a setting is to facilitate the increase of the rotation speed of the lead screw 205 through such a setting.

[0025] Specifically, the shaft 203 is fixedly connected with a gear 209, the gear 209 is engagedly connected with a rack 301, and the rack 301 is fixedly connected with the rack 101.

[0026] For the above example, those skilled in the art should know that in the implementation of the above technical solutions, the specific rack 301 described in the above embodiment is not limited, for example, the length of the rack 301 should be less than 1 / 4 of the circumference of the gear 209. The purpose of such a setting is to facilitate the small amplitude rotation of the frame 201, thereby avoiding the test block from falling out of the frame 201.

[0027] Specifically, the frame 201 is fixedly connected with a positioning rod 304 on both sides, the positioning rod 304 is slidably connected with a support rod 303, and the support rod 303 is fixedly connected with a buffer plate 302.

[0028] For the above example, those skilled in the art should know that in the implementation of the above technical solutions, the specific buffer plate 302 described in the above embodiment is not limited, for example, the buffer plate 302 is provided with a soft rubber layer. The purpose of such a setting is to facilitate the further increase of the buffering effect on the test block through such a setting.

[0029] Specifically, the positioning rod 304 is sleeved with a spring 305, one end of the spring 305 is fixedly connected with the support rod 303, and the other end of the spring 305 is fixedly connected with the frame 201.

[0030] For the above example, those skilled in the art should know that in the implementation of the above technical solutions, the specific spring 305 described in the above embodiment is not limited, for example, the spring 305 can be selected from other forms of elastic components, such as air cushions. The purpose of such a setting is that the spring is prone to deformation after long-term use, and by replacing the material that is not prone to deformation, the service life of the spring can be effectively prolonged.

[0031] In the embodiment of the utility model, the user places the concrete test block on the net plate 208, and then starts the motor 207, at this time, the lead screw 205 fixedly connected to the output shaft starts to rotate, and drives the slide rod 204 fixedly connected thereto to start linear motion, at the same time, the damping rubber strip arranged on the guide rod 206 can effectively increase the damping of the frame 201 sliding, so that the frame 201 can slide smoothly, and the connecting plate 202 fixedly connected to the slide rod 204 starts to slide synchronously, at this time, the concrete test block placed on the frame 201 can be immersed in water, after the concrete test block is soaked for a period of time, the user continues to start the motor 207, so that the frame 201 continues to descend, at this time, the gear 209 is driven to slide onto the rack 301, then the user keeps the motor 207 in the starting state, so that the gear 209 starts to roll on the rack 301 under the cooperation of the rack 301, and drives the shaft 203 fixedly connected to the axis to start synchronous rotation, at the same time, since the shaft 203 is provided with the damping rubber ring at the connecting position of the shaft 203 and the connecting plate 202, the connecting plate 202 can be effectively prevented from rotating by itself without the cooperation of the rack 301, at this time, the frame 201 starts to rotate at a constant speed under the cooperation of the shaft 203 fixedly connected thereto, so as to adjust the angle of the frame 201, and then the cylindrical concrete test block can roll on the frame 201, so as to adjust the position of the concrete test block, avoid the part of the concrete test block in contact with the net plate 208 from being unable to be immersed in water, and at the same time, when the test block rolls to the two ends of the frame 201, the buffer plate 302 can be pushed, so that the supporting rod 303 starts to slide on the positioning rod 304 slidably connected thereto, and then starts to compress the spring 305 fixedly connected thereto, so as to provide buffering for the rolling of the concrete test block, and avoid the concrete test block from being damaged by impact.

[0032] It should be noted that, in this document, the terms "first" and "second" and the like are used merely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0033] The fixed connection referred to in the present application refers to a connection without any relative movement after the parts or components are fixed. It is divided into two kinds of detachable connection and non-detachable connection.

[0034] (1) detachable connection: use screws, splines, wedge pins, etc. to fix the parts together. This connection mode can be disassembled during maintenance, and the parts will not be damaged. However, the specifications of the connecting parts used (such as the length of the bolt, key, and wedge pin) must be correct, and the fastening must be appropriate.

[0035] (2) Non-detachable connection: mainly refers to welding, riveting and over tenon matching, etc. Since it needs to be forged, sawed or oxygen cut to be disassembled during maintenance or replacement, the spare parts generally cannot be used twice. At the same time, attention should be paid to the process quality, technical detection and remedial measures (such as correction, polishing, etc.) during connection.

[0036] The sliding connection referred to in the present application means that the components can slide along a linear track, and the articulation referred to in the present application means that the components can rotate along an axial constraint.

[0037] In some cases, the sliding connection and articulation referred to in the present application can also be damped, so that the components have the ability to be maintained in the desired position.

[0038] Although the embodiments of the present application have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A device for determining the permeability of concrete comprising a frame (101), characterised in that, Also include: Adjusting assembly (2) for adjusting the position of the concrete test block; The adjusting assembly (2) comprises a frame (201), a connecting plate (202) and a shaft (203), one end of the shaft (203) is fixedly connected with the frame (201), the other end of the shaft (203) is rotatably connected with the connecting plate (202), the connecting plate (202) is provided with a damping rubber ring at the connecting position with the shaft (203), and the frame (201) is fixedly connected with a mesh plate (208) at the bottom.

2. The device for determining the permeability of concrete according to claim 1, characterized in that The connecting plate (202) is fixedly connected with a sliding rod (204), the sliding rod (204) is threadedly connected with a lead screw (205), and the lead screw (205) is rotatably connected with a rack (101).

3. The device for determining the permeability of concrete according to claim 2, characterized in that The sliding rod (204) is slidably connected with a guide rod (206), and two guide rods (206) are symmetrically fixedly connected with the rack (101).

4. The device for determining the permeability of concrete according to claim 2, characterized in that, One end of the lead screw (205) is fixedly connected with the output shaft of a motor (207), and the motor (207) is fixedly connected with the rack (101).

5. The device for determining the permeability of concrete according to claim 1, characterized in that, The shaft (203) is fixedly connected with a gear (209), the gear (209) is meshingly connected with a rack (301), and the rack (301) is fixedly connected with the rack (101).

6. The device of claim 1, wherein, The frame (201) is symmetrically fixedly connected with a positioning rod (304) on both sides, the positioning rod (304) is slidably connected with a supporting rod (303), and the supporting rod (303) is fixedly connected with a buffer plate (302).

7. The device for determining the permeability of concrete according to claim 6, characterized in that The positioning rod (304) is sleeved with a spring (305), one end of the spring (305) is fixedly connected with the supporting rod (303), and the other end of the spring (305) is fixedly connected with the frame (201).

8. The device for determining the permeability of concrete according to claim 6, characterized in that The buffer plate (302) is provided with a soft rubber layer.

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