A concrete strength field tester

Abstract

The utility model relates to concrete strength test technical field, concretely is a kind of concrete strength field tester, including bottom plate, the bottom plate top is provided with locking mechanism, the locking mechanism includes sliding cylinder, the sliding groove is established in sliding cylinder inboard, the sliding groove is fixedly installed with sliding rod, the sliding rod outside is equipped with contraction spring, the sliding rod upper side is located in the movable mounting of contraction spring top end with connecting rod, the connecting rod front end is fixedly installed with the clamping plate, the clamping plate middle is established with the clamping slot, the clamping slot is provided with test mechanism, the utility model increases supporting surface by bottom plate and makes the stable sliding of clamping plate, so that when carrying out strength test, can make the resilient structure keep stable pressure state, avoid the inaccuracy caused by inclination when pressing, and the locking mechanism and test structure are separate structure, so it can be freely selected according to use environment when using, avoid being limited by environment.

Description

Technical Field

[0001] This utility model relates to the field of concrete strength testing technology, specifically a concrete strength field tester. Background Technology

[0002] Concrete strength testing is an important means of evaluating the performance and safety of concrete structures. It mainly includes: 1. Rebound hammer method: a non-destructive testing method that measures the surface hardness of concrete using a rebound hammer to estimate compressive strength; simple to operate but with relatively low accuracy. 2. Ultrasonic pulse method: infers strength based on the propagation speed or attenuation value of ultrasonic waves in concrete; suitable for detecting internal defects. 3. Combined ultrasonic and rebound method: combines ultrasonic and rebound methods to improve testing accuracy and reliability, but is susceptible to interference from metal objects such as reinforcing bars. 4. Core drilling method: directly drills concrete core samples for compressive strength testing; offers the highest accuracy but is destructive. 5. Pull-out method: estimates concrete strength by measuring the tensile force exerted when anchors are pulled out; suitable for specific situations. 6. Other methods: including flexural strength, splitting tensile strength, direct tensile strength, elastic modulus, and durability testing. The rebound hammer method is usually chosen for on-site testing.

[0003] However, existing concrete strength field testers often experience swaying and tilting when pressure is applied to the tester to induce rebound testing. This is because the impact component has a small support surface, which can lead to slippage and hand injuries to the user. Some testers with lockable contact surfaces have non-removable structures, and the locking structure takes up more space, thus limiting their use. Utility Model Content

[0004] The purpose of this invention is to provide a field concrete strength tester to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A concrete strength field tester includes a base plate with a locking mechanism at the top. The locking mechanism includes a sliding cylinder with a sliding groove on its inner side. A sliding rod is fixedly installed in the sliding groove, and a contraction spring is sleeved on the outer side of the sliding rod. A connecting rod is movably installed on the upper side of the sliding rod at the top of the contraction spring. A locking plate is fixedly installed at the front end of the connecting rod, and a locking groove is formed in the middle of the locking plate. A testing mechanism is installed in the locking groove.

[0007] Preferably, the testing mechanism includes a rebound cylinder, the bottom end of which is movably installed in a locking groove, a cylinder cover is fixedly installed at the rear end of the top end of the rebound cylinder, and a scale is fixedly installed on the outside of the rebound cylinder.

[0008] Preferably, a pin is fixedly installed at the top of the inside of the cylinder cover, a return spring is fixedly installed inside the cylinder cover, and a guide flange is fixedly installed at the bottom of the return spring.

[0009] Preferably, a rotating block is fixedly installed at the top of the guide flange, a hook is movably installed inside the rotating block, and a jacking spring is fixedly installed between one end of the hook and the guide flange.

[0010] Preferably, the hook is fixedly installed inside the locking block, the locking block is fixedly installed on the top of the impact hammer, and a spring is fixedly installed between the bottom of the impact hammer and the bottom of the inside of the rebound cylinder.

[0011] Preferably, a sliding rod is movably installed inside the impact hammer, the sliding rod is fixedly installed in the middle of the bottom end of the guide flange, and the bottom end of the sliding rod passes through the bottom end of the rebound cylinder and is fixedly installed with an impact rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This concrete strength field tester increases the support surface through the base plate and sliding cylinder and slides stably through the locking plate, so that when the rebound structure is used for strength testing, the rebound structure can maintain a stable pressure state and avoid tilting during pressure application, which would lead to inaccurate testing.

[0014] 2. This concrete strength field tester has a locking structure and a testing structure that are separate, so the locking structure can be freely selected according to the usage environment, avoiding environmental limitations. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the locking mechanism of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the testing mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the planar structure of the testing mechanism of this utility model.

[0019] In the diagram: 101, base plate; 102, locking mechanism; 103, sliding groove; 104, sliding rod; 105, retraction spring; 106, connecting rod; 201, locking plate; 202, locking groove; 203, testing mechanism; 204, spring return cylinder; 205, cylinder cover; 206, scale; 301, ejector pin; 302, return spring; 303, guide flange; 304, rotating block; 305, hook; 306, jacking spring; 401, locking block; 402, impact hammer; 403, spring tension spring; 404, sliding rod; 405, impact rod; 406, sliding cylinder. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-4 As shown, this utility model provides a technical solution:

[0022] A concrete strength field tester includes a base plate 101. A locking mechanism 102 is provided at the top of the base plate 101. The locking mechanism 102 includes a sliding cylinder 406. A sliding groove 103 is provided on the inner side of the sliding cylinder 406. A sliding rod 104 is fixedly installed in the sliding groove 103. A contraction spring 105 is sleeved on the outer side of the sliding rod 104. A connecting rod 106 is movably installed on the upper side of the sliding rod 104 at the top of the contraction spring 105. A locking plate 201 is fixedly installed at the front end of the connecting rod 106. A locking groove 202 is provided in the middle of the locking plate 201. A testing mechanism 203 is provided in the locking groove 202.

[0023] The above scheme increases the support surface of the sliding cylinder by using the base plate, making the test structure more stable when pressed down. The sliding groove allows the sliding rod to be installed and the connecting rod to slide. The spring can be contracted and then rebound, allowing the connecting rod to drive the locking plate to reset. The sliding rod can keep the locking plate stable when the connecting rod slides. The locking groove fits into the rebound cylinder, ensuring that the rebound cylinder remains stable and does not shake when pressure is applied.

[0024] In this embodiment, preferably, the testing mechanism 203 includes a rebound cylinder 204, the bottom end of which is movably installed in the locking groove 202, a cylinder cover 205 is fixedly installed at the rear end of the top end of the rebound cylinder 204, and a scale 206 is fixedly installed on the outside of the rebound cylinder 204.

[0025] The above solution allows for convenient maintenance and repair of the inside of the rebound cylinder via the cylinder cover, and the concrete strength can be indicated via the scale.

[0026] In this embodiment, preferably, a pin 301 is fixedly installed at the top of the inner part of the cylindrical cover 205, a return spring 302 is fixedly installed inside the cylindrical cover 205, and a guide flange 303 is fixedly installed at the bottom of the return spring 302.

[0027] With the above scheme, the pin can push the hook to rotate and separate it from the locking block. The return spring can drive the hook to reset and re-engage with the locking block after the test. The guide flange can keep the internal contraction stable.

[0028] In this embodiment, preferably, a rotating block 304 is fixedly installed on the top of the guide flange 303, a hook 305 is movably installed inside the rotating block 304, and a pushing spring 306 is fixedly installed between one end of the hook 305 and the guide flange 303.

[0029] The above scheme allows the hook to rotate via a rotating block, and the hook to automatically reset after rotation via a pushing spring.

[0030] In this embodiment, preferably, the hook 305 is fixedly installed inside the locking block 401, the locking block 401 is fixedly installed at the top of the impact hammer 402, and a spring tension spring 403 is fixedly installed between the bottom end of the impact hammer 402 and the bottom end of the inner cavity of the rebound cylinder 204.

[0031] With the above scheme, when the guide flange moves by connecting the hook and the locking block, it can drive the impact hammer to move and cause the spring to stretch. After the spring is stretched and reset, it can drive the impact hammer to hit the impact rod.

[0032] In this embodiment, preferably, a slide rod 404 is movably installed inside the impact hammer 402, the slide rod 404 is fixedly installed in the middle of the bottom end of the guide flange 303, and the bottom end of the slide rod 404 passes through the bottom end of the rebound cylinder 204 and is fixedly installed with an impact rod 405.

[0033] The above scheme allows the sliding rod to move the guide flange during retraction, and the sliding rod also keeps the impact hammer moving stably. The impact rod can then strike concrete products to conduct strength tests.

[0034] In this embodiment of the concrete strength field tester, the user places the base plate 101 on the concrete product and engages the bottom end of the rebound cylinder 204 in the engaging groove 202. The groove shape of the engaging groove 202 matches the shape of the bottom end of the rebound cylinder 204, thus ensuring the fixation of the rebound cylinder 204. After the rebound cylinder 204 is engaged, the user pushes the cylinder cover 205 by hand to push the rebound cylinder 204. The pushing of the rebound cylinder 204 causes the engaging plate 201 to drive the connecting rod 106 to slide in the sliding groove 103, thereby causing the compression spring 105 to contract and the connecting rod 106 to slide stably outside the sliding rod 104. This ensures that the rebound cylinder 204 remains stable and does not swing when pushed. At the same time, the impact rod 405 of the rebound cylinder 204 comes into contact with the concrete product and contracts. During the contraction, the guide flange 303 moves through the sliding rod 404 and drives the return spring 302 to contract. When the guide flange 303 moves, it will move through the hook 3 05 engages with the locking block 401, causing the impact hammer 402 to move and the spring-loaded spring 403 to stretch. When the guide flange 303 moves one end of the hook 305 onto the ejector pin 301, the ejector pin 301 pushes the hook 305 to rotate, causing the locking block 401 to disengage from the hook 305. At this time, the impact hammer 402, through the contraction of the spring-loaded spring 403, impacts the impact rod 405, causing the concrete product to absorb part of the impact force. The unabsorbed impact force is converted into potential energy, causing the spring-loaded spring 403 to spring back, causing the impact hammer 402 to rebound. During the impact and rebound process, the impact hammer 402 will drive the pointer to move on the pointer shaft through the pointer plate inside the scale 206. After the movement stops, the scale on the scale 206 indicates the strength of the concrete product. After the test, the user releases the rebound cylinder 204. At this time, the return spring 302 rebounds, causing the component to reset, causing the hook 305 to engage with the locking block 401 again, so that the next round of testing can be carried out.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A field tester for concrete strength, characterized in that... The device includes a base plate (101), a locking mechanism (102) at the top of the base plate (101), a sliding cylinder (406), a sliding groove (103) on the inner side of the sliding cylinder (406), a sliding rod (104) fixedly installed in the sliding groove (103), a contraction spring (105) sleeved on the outer side of the sliding rod (104), a connecting rod (106) movably installed on the upper side of the sliding rod (104) at the top of the contraction spring (105), a locking plate (201) fixedly installed at the front end of the connecting rod (106), a locking groove (202) in the middle of the locking plate (201), and a testing mechanism (203) provided in the locking groove (202).

2. The concrete strength field testing instrument according to claim 1, characterized in that... The testing mechanism (203) includes a rebound cylinder (204), the bottom end of which is movably installed in the locking groove (202), a cylinder cover (205) is fixedly installed at the rear end of the top end of the rebound cylinder (204), and a scale (206) is fixedly installed on the outside of the rebound cylinder (204).

3. The concrete strength field testing instrument according to claim 2, characterized in that... A pin (301) is fixedly installed at the top of the inside of the cylinder cover (205), a return spring (302) is fixedly installed inside the cylinder cover (205), and a guide flange (303) is fixedly installed at the bottom of the return spring (302).

4. A concrete strength field testing instrument according to claim 3, characterized in that... A rotating block (304) is fixedly installed on the top of the guide flange (303), and a hook (305) is movably installed inside the rotating block (304). A jacking spring (306) is fixedly installed between one end of the hook (305) and the guide flange (303).

5. A concrete strength field testing instrument according to claim 4, characterized in that... The hook (305) is fixedly installed inside the locking block (401), the locking block (401) is fixedly installed on the top of the impact hammer (402), and a spring tension spring (403) is fixedly installed between the bottom end of the impact hammer (402) and the bottom end inside the rebound cylinder (204).

6. A concrete strength field testing instrument according to claim 5, characterized in that... The impact hammer (402) has a sliding rod (404) installed inside. The sliding rod (404) is fixedly installed in the middle of the bottom end of the guide flange (303). The bottom end of the sliding rod (404) passes through the bottom end of the rebound cylinder (204) and the impact rod (405) is fixedly installed thereon.

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