Safety protector strength detection device

Abstract

The utility model belongs to the field of protector detection equipment, and particularly relates to a strength detection device for a safety protector. The device comprises a horizontally arranged bottom plate, two supporting rods are fixed on the bottom plate, the two supporting rods are of an inverted L-shaped structure, a positioning sleeve is fixed between horizontal sections of the two supporting rods, a guide pipe is vertically and independently installed in the positioning sleeve in a penetrating mode, a locking assembly used for locking a drop hammer is arranged at the upper end of the guide pipe, and a force measuring sensor is installed on the bottom plate. A head model is installed on the force measuring sensor, a controller electrically connected with the force measuring sensor is installed on the supporting rod, an installation assembly used for installing a chin strap is arranged on the bottom plate, and a protective cover which is communicated with the guide pipe and used for covering the head model is fixed to the bottom of the guide pipe. Through cooperative use of the supporting rod, the bottom plate, the guide pipe, the protective cover, the head mold, the force measuring sensor, the baffle and the like, the strength of the safety helmet can be simply and rapidly detected, and the strength detection device for the safety helmet is simple in overall structure and convenient for workers to transfer.

Description

Technical Field

[0001] This utility model belongs to the field of protective gear testing equipment, and in particular relates to a safety protective gear strength testing device. Background Technology

[0002] All safety protective equipment that construction workers must wear is collectively referred to as safety gear, among which the most representative is head protection equipment, namely the safety helmet. As the core equipment for ensuring workplace safety, high-quality safety helmets undergo scientific verification from material selection to component design: the precise combination of engineering plastics and cushioning lining, the coordinated design of the streamlined shell and headband system, and every detail undergoes multiple physical tests in the laboratory, including impact absorption and puncture resistance. This multi-dimensional protection system ensures that safety helmets can effectively protect workers' heads in the event of sudden danger, building a reliable life barrier for construction workers.

[0003] Construction sites are characterized by a diverse workforce and low safety awareness among workers, leading to numerous loopholes in site management. Therefore, preventing falls from heights and injuries from falling objects is particularly critical. The primary protective measure against falling objects at construction sites is the wearing of safety helmets. Consequently, testing the strength of safety helmets is of paramount importance. However, existing safety gear strength testing devices are bulky and complex, making them inconvenient to use. Utility Model Content

[0004] The purpose of this invention is to provide a safety gear strength testing device with a simple structure and a simple and fast testing process.

[0005] The aforementioned safety gear strength testing device includes a horizontally set base plate, on which two support rods are fixed. The two support rods are in an inverted "L" shape. A positioning sleeve is fixed between the horizontal sections of the two support rods. A guide tube is vertically and independently installed inside the positioning sleeve. A locking component for locking the drop hammer is provided at the upper end of the guide tube. A force sensor is installed on the base plate, and a head mold is installed on the force sensor. A controller electrically connected to the force sensor is installed on the support rod. An installation component for installing a chin strap is provided on the base plate. A protective cover communicating with and covering the head mold is fixed at the bottom of the guide tube.

[0006] Furthermore, the locking assembly includes a pull rod in an "L" shape. A mounting sleeve is horizontally fixed on the outer wall of the conduit. One end of the pull rod is independently inserted into the mounting sleeve, and a baffle is horizontally fixed on the other end of the pull rod. A through hole is provided on the side wall of the conduit for independently inserting the baffle. A spring is fitted on the end of the pull rod that passes through the mounting sleeve, and a side plate is fixed on the end of the pull rod that passes through the mounting sleeve. The spring is located between the mounting sleeve and the side plate.

[0007] Furthermore, the mounting assembly includes a limiting rod, a vertical plate is vertically fixed on the base plate, the limiting rod is horizontally fixed on the vertical plate, the limiting rod faces the force sensor, and two spaced-apart sleeves are fitted on the limiting rod.

[0008] Furthermore, the positioning sleeve is fitted with screws for locking the conduit after it has moved up and down.

[0009] Furthermore, the protective cover has a window that connects the inside and outside, and a transparent plate is fixed inside the window for sealing.

[0010] Furthermore, a cushioning pad for buffering the falling hammer is provided on the top of the base plate.

[0011] Furthermore, several support legs are vertically fixed to the bottom of the base plate.

[0012] Furthermore, a positioning sleeve for positioning the falling hammer is fixed inside the conduit.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. By using a combination of support rods, base plate, conduit, protective cover, head mold, force sensor, baffle, etc., the strength of safety helmets can be tested quickly and easily. The overall structure of this safety gear strength testing device is simple and easy for workers to move around.

[0015] 2. After the guide tube moves down a certain distance, the bottom of the protective cover fits into the base plate. The protective cover covers the head mold and the safety helmet on the head mold, so that when the drop hammer hits the safety helmet and bounces back, the protective cover can block the drop hammer and prevent it from flying around and injuring the workers. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 for Figure 1 Sectional view at point AA;

[0018] Figure 3 for Figure 1 Sectional view at point BB;

[0019] Figure 4 This is a perspective view of the present utility model;

[0020] Figure 5 This is an exploded view of the present invention;

[0021] The components in the diagram are named as follows: 1. Support rod; 2. Controller; 3. Conduit; 4. Mounting sleeve; 5. Spring; 6. Pull rod; 7. Positioning sleeve; 8. Transparent plate; 9. Protective cover; 10. Head mold; 11. Force sensor; 12. Vertical plate; 13. Positioning sleeve; 14. Stop sleeve; 15. Limiting rod; 16. Baffle. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention. Example

[0023] The safety gear strength testing device described in this embodiment, such as Figure 1 , Figure 2 and Figure 4 As shown, it includes a horizontally arranged base plate, and several support legs are vertically fixed to the bottom of the base plate; in this embodiment, four support legs are evenly fixed to the bottom of the base plate, which support the base plate to avoid direct contact and wear between the base plate and the ground, and extend the service life of the base plate.

[0024] Two support rods 1 are fixed on the base plate. The two support rods 1 are in an inverted "L" shape. Figure 1 , Figure 3 and Figure 5 As shown, the two support rods 1 are symmetrically distributed with a left-right interval, and the vertical ends of the two support rods 1 are fixed to the top of the base plate.

[0025] A positioning sleeve 7 is fixed between the horizontal sections of the two support rods 1, such as Figure 1 , Figure 2 and Figure 5 As shown, the horizontal ends of the two support rods 1 are fixed on the outer wall of the positioning sleeve 7. The positioning sleeve 7 is located above the base plate and is aligned with the center of the base plate.

[0026] The positioning sleeve 7 has a vertically independent guide tube 3 inserted inside; such as Figure 2 and Figure 5 As shown, there is a gap between the conduit 3 and the positioning sleeve 7, which allows the conduit 3 to move up and down; the positioning sleeve 7 is fitted with a screw for locking the conduit 3 after it has moved up and down, and the positioning sleeve 7 has a threaded hole that is open inside and out and is threaded to the screw; the conduit 3 can guide the fall of the drop hammer.

[0027] The guide tube 3 is fixed with a positioning sleeve 13 for positioning the drop hammer, such as... Figure 2 As shown, the positioning sleeve 13 is located at the upper end of the inside of the conduit 3. The positioning sleeve 13 can position the drop hammer at the center of the upper end of the conduit 3, so that the drop hammer can hit the safety helmet more accurately.

[0028] To elaborate further, such as Figure 2 , Figure 3 and Figure 5 As shown, this embodiment preferably includes a pull rod 6, which has an "L"-shaped structure and is horizontally positioned; an installation sleeve 4 is horizontally fixed on the outer wall of the conduit 3, as shown. Figure 2 As shown, the mounting sleeve 4 is horizontally fixed to the outer wall of the upper half of the conduit 3; one section of the tie rod 6 is independently inserted into the mounting sleeve 4, as shown. Figure 3 As shown, there is a gap between one end of the pull rod 6 and the inner wall of the mounting sleeve 4, allowing the pull rod 6 to move left and right; a baffle 16 is horizontally fixed on the other end of the pull rod 6, and a through hole for independently inserting the baffle 16 is provided on the side wall of the guide tube 3; Figure 3 and Figure 5 As shown, there is a gap between the baffle 16 and the through hole, allowing the baffle 16 to move left and right within the through hole. When the pull rod 6 moves left and right, it can drive the baffle 16 to move left and right, as shown. Figure 3 As shown, one end of the baffle 16 can move horizontally into the interior of the guide tube 3. The baffle 16 blocks and positions the drop hammer placed inside the guide tube 3, preventing the drop hammer from falling off by itself. A spring 5 is fitted onto the end of the pull rod 6 that passes through the mounting sleeve 4. A side plate is fixed onto the end of the pull rod 6 that passes through the mounting sleeve 4. The spring 5 is located between the mounting sleeve 4 and the side plate. The spring 5 is fitted onto the right end of the pull rod 6. Figure 3 As shown, in the initial state, the right end of the baffle 16 is located inside the guide tube 3, blocking the falling hammer. When the lever 6 moves, the side plate will squeeze the spring 5 to the left, and the lever 6 will drive the baffle 16 to move to the left, so as to release the baffle 16 from blocking the falling hammer, allowing the falling hammer to fall freely under the action of gravity. This scheme constitutes a locking assembly for locking the falling hammer. Of course, the locking assembly includes a plug plate. The side wall of the guide tube 3 has a hole that is open inside and outside and is used for horizontally inserting the plug plate. One end of the plug plate is inserted into the guide tube 3, and the plug plate blocks the falling hammer. When the plug plate is pulled out, the baffle 16 is released from blocking the falling hammer, allowing the falling hammer to fall freely under the action of gravity.

[0029] A force sensor 11 is mounted on the base plate. The force sensor 11 is an existing product, such as the existing model "CZL203, CMP1 series, HBM-C6B". The force sensor consists of three main parts: one or more elastic bodies that can deform under force, a bridge circuit (such as a Wheatstone bridge) composed of a resistance strain gauge that can sense this deformation, an adhesive that can fix the resistance strain gauge to the elastic body and conduct the strain, and a sealant that protects the electronic circuit. When subjected to external force, the strain gauge attached to the elastic body deforms, causing a change in resistance. The change in resistance causes the Wheatstone bridge to lose balance and output an electrical signal that changes linearly proportional to the external force.

[0030] A head mold 10 is installed on the force sensor 11. The head mold 10 is an existing product. The head mold 10 is mainly made of aluminum-silicon alloy or magnesium-aluminum alloy and conforms to the provisions of Appendix A of GB / T2812-2006 standard. It is mainly used to hold the safety helmet.

[0031] A controller 2, which is electrically connected to the force sensor 11, is installed on the support rod 1. The controller 2 is an existing product, which is mainly used to receive and process the impact force data detected by the force sensor 11. The controller types include combinational logic, microprogram, CPU, etc. The controller model with a built-in display screen is selected. When the safety helmet on the head mold 10 is impacted by the falling hammer, the impact force will be transmitted to the force sensor 11 through the head mold 10. The force sensor 11 detects the impact force, and the controller 2 receives and processes the data detected by the force sensor 11 and displays it on the display screen for the staff to view.

[0032] To elaborate further, such as Figure 2 , Figure 4 and Figure 5 As shown, it includes a limiting rod 15, a vertical plate 12 is vertically fixed on the base plate, and the limiting rod 15 is horizontally fixed on the vertical plate 12. The limiting rod 15 faces the force sensor 11. Figure 2 As shown, the limiting rod 15 is located below the head mold 10, and two spaced-apart retaining sleeves 14 are fitted on the limiting rod 15. In use, the safety helmet is placed on the head mold 10, and the chin strap on the safety helmet is fitted onto the limiting rod 15, with the chin strap positioned between the two retaining sleeves 14. The two retaining sleeves 14 limit the chin strap, and by adjusting the length of the chin strap, it is made taut, thereby fixing the safety helmet on the head mold 10 and preventing it from slipping off the head mold 10, making the safety helmet more stable during the testing process. This solution constitutes an installation assembly for installing the chin strap. Of course, the installation assembly can also use an L-shaped installation rod, with the vertical end of the installation rod fixed to the base plate, and the horizontal section of the installation rod having a groove for engaging the chin strap. By adjusting the length of the chin strap, it is made taut, thereby fixing the safety helmet on the head mold 10.

[0033] The bottom of the conduit 3 is fixed with a protective cover 9 that communicates with it and is used to cover the head mold 10, such as... Figure 2 and Figure 5As shown, the protective cover 9 is fixed to the bottom of the guide tube 3, and the inside of the guide tube 3 is connected to the inside of the protective cover 9, so that when the hammer falls, it can fall into the protective cover 9. When the guide tube 3 moves up and down, it can drive the protective cover 9 to move up and down. When the guide tube 3 moves down a certain distance, the bottom of the protective cover 9 is in contact with the base plate, and the protective cover 9 covers the head mold 10 and the safety helmet on the head mold 10. When the hammer hits the safety helmet and bounces back, the protective cover 9 can block the hammer and prevent the hammer from flying around and injuring the workers. When the guide tube 3 moves up a certain distance, the head mold 10 and the safety helmet are exposed, and the workers can take the safety helmet.

[0034] The protective cover 9 has a window that connects the inside and outside. Inside the window, there is a transparent plate 8 that is fixed to seal it. The transparent plate 8 is made of materials such as PC board, acrylic board, and PET board. These materials have good impact resistance to prevent the transparent plate 8 from being easily broken by the impact of the drop hammer. During the inspection process, the staff can look inside the protective cover 9 through the transparent plate 8 to observe the condition of the safety helmet in real time.

[0035] The top of the base plate is equipped with a cushioning pad for buffering the falling hammer. The cushioning pad is mainly made of rubber, silicone, cushioning foam and other materials. It is mainly used to buffer the falling hammer that falls onto the base plate to prevent damage to the falling hammer and the base plate, thereby extending the service life of the base plate and the falling hammer.

[0036] In practice, the drop hammer is placed in the guide tube 3, and the baffle 16 blocks and positions the drop hammer. The safety helmet is then placed on the head mold 10, and the chin strap is fitted onto the limiting rod 15. By adjusting the length of the chin strap, it is made taut, thus securing the safety helmet on the head mold 10 and preventing it from slipping off. The guide tube 3 is then lowered, allowing the protective cover 9 to cover the head mold 10 and the safety helmet. Then, the pull rod 6 is pushed, causing the baffle 16 to move, releasing the baffle 16's obstruction of the drop hammer. This allows the 5KG drop hammer to fall freely under gravity, vertically... When the hammer strikes the top of the safety helmet, the impact force is transmitted through the head mold 10 to the force sensor 11. The force sensor 11 detects the impact force, and the controller 2 receives and processes the data detected by the force sensor 11, displaying the maximum impact force on the screen. According to the GB2811-2007 "Safety Helmet" standard, if the peak impact force is ≤4900N (or 500kg) and the helmet body does not crack or detach, it is considered qualified; otherwise, it is unqualified. This safety gear strength testing device has a simple overall structure and is easy and quick to use.

Claims

1. A safety guard strength detection apparatus comprising a horizontally disposed base plate, characterized by: Two support rods (1) are fixed on the base plate. The two support rods (1) are in an inverted "L" shape. A positioning sleeve (7) is fixed between the horizontal sections of the two support rods (1). A guide tube (3) is vertically and independently installed inside the positioning sleeve (7). A locking component for locking the drop hammer is provided at the upper end of the guide tube (3). A force sensor (11) is installed on the base plate. A head mold (10) is installed on the force sensor (11). A controller (2) electrically connected to the force sensor (11) is installed on the support rod (1). An installation component for installing the chin strap is provided on the base plate. A protective cover (9) that communicates with the guide tube (3) and is used to cover the head mold (10) is fixed at the bottom of the guide tube (3).

2. The safety gear strength testing apparatus according to claim 1, characterized by: The locking assembly includes a pull rod (6), which has an "L" shaped structure. An installation sleeve (4) is horizontally fixed on the outer side wall of the conduit (3). One end of the pull rod (6) is independently inserted into the installation sleeve (4), and a baffle (16) is horizontally fixed on the other end of the pull rod (6). A through hole for independently inserting the baffle (16) is provided on the side wall of the conduit (3). A spring (5) is fitted on the end of the pull rod (6) that passes through the installation sleeve (4). A side plate is fixed on the end of the pull rod (6) that passes through the installation sleeve (4), and the spring (5) is located between the installation sleeve (4) and the side plate.

3. The safety gear strength testing device according to claim 1, characterized in that: The installation assembly includes a limiting rod (15), a vertical plate (12) is vertically fixed on the base plate, the limiting rod (15) is horizontally fixed on the vertical plate (12), the limiting rod (15) faces the force sensor (11), and two spaced-apart sleeves (14) are fitted on the limiting rod (15).

4. The safety gear strength testing device according to claim 1, characterized in that: The positioning sleeve (7) is fitted with screws for locking the guide tube (3) after it moves up and down.

5. The safety gear strength testing apparatus of claim 1, wherein: The protective cover (9) has a window that connects the inside and outside, and a transparent plate (8) is fixed inside the window for sealing.

6. The safety gear strength testing apparatus of claim 1, wherein: The top of the base plate is provided with a cushioning pad for buffering the falling hammer.

7. The safety gear strength testing apparatus of claim 6, wherein: The bottom of the base plate is vertically fixed with several support legs.

8. The safety gear strength testing device according to claim 1, characterized in that: The guide tube (3) is fixed with a positioning sleeve for positioning the drop hammer.

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