Tension test device for strap

Abstract

The utility model discloses a tension testing device for a strap. The tension testing device comprises a bottom plate, a plurality of lower pull rods, a supporting plate, a positioning block, a positioning sleeve, a clamping ring, a lug ring and a jack, the lower pull rod and the positioning block are fixedly mounted on the bottom plate; the supporting plate is mounted at the upper end of the lower pull rod; the jack is fixed on the supporting plate; each positioning block is of a cuboid-shaped structure with a semicircular groove formed in the upper end face, and the two positioning blocks are installed on the bottom plate in parallel. The positioning sleeve is supported in the semicircular grooves of the two positioning blocks; the top of each positioning block is provided with a clamping ring of a semicircular ring structure. The lug ring comprises a connecting shaft and a hanging ring arranged at the lower end of the connecting shaft, and two hanging ring holes are formed in the hanging ring and used for being connected with the two ends of the strap respectively; the upper end of the connecting shaft is connected with the output end of the jack through a tension-compression sensor. The device is simple and compact in structure, low in cost and convenient to operate; the tension test can be conveniently carried out on the strap piece by piece in real time in a production place, the product quality is ensured, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a tension test device for a strap, belonging to the technical field of measuring devices. Background Art

[0002] Certain aircraft equipment requires steel straps to hold hundreds of kilograms of weight vertically suspended in mid-air. During flight, especially during takeoff and landing, the straps are subjected to immense tensile forces, placing high demands on the straps' mechanical properties. In addition to testing the various mechanical properties of the strap raw materials and performing tensile testing on random samples of finished straps, each strap undergoes a tensile test. This requires ensuring that the straps remain in good condition, exhibit no deformation, and demonstrate reliable and safe mechanical properties at a set safety tension. Tension testing of all straps requires the design of dedicated tensile testing equipment, which can be performed on-site. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a strap tension testing device which has a simple structure, is easy to operate, and can test the mechanical properties of the strap.

[0004] The technical solution adopted by the utility model is: a hoop tension test device, comprising a base plate, a lower pull rod, a support plate, a positioning block, a positioning sleeve, a snap ring, an earring and a jack; a plurality of lower pull rods and the positioning block are fixedly mounted on the base plate, and the lower pull rods are arranged perpendicular to the base plate; the support plate is mounted at the upper end of the lower pull rod, and the support plate is parallel to the base plate; the jack is fixed on the support plate;

[0005] The positioning block is a rectangular structure with a semicircular groove on the upper end surface. The two positioning blocks are installed in parallel on the base plate, and the semicircular grooves of the two positioning blocks are coaxially arranged; the positioning sleeve is supported in the semicircular grooves of the two positioning blocks; a semicircular ring structured snap ring is installed on the top of each positioning block, and the snap ring positions the positioning sleeve circumferentially; the earring includes a connecting shaft and a lifting ring arranged at the lower end of the connecting shaft, and the lifting ring is provided with two lifting ring holes, which are respectively used to connect the two ends of the hoop; the upper end of the connecting shaft is connected to the output end of the jack through a tension and compression sensor.

[0006] The above-mentioned strap tension test device also includes a precision digital instrument, which is connected to the tension and compression sensor.

[0007] In the above-mentioned hoop tension test device, the jack is installed on the top surface of the support plate, the output end of the jack is fixedly connected to the upper connecting plate, and the two ends of the upper connecting plate are respectively connected to an upper pull rod, the upper pull rod is parallel to the axis of the jack, and the lower end of the upper pull rod passes through the support plate and is connected to the lower connecting plate; a connecting screw is fixedly installed in the middle of the lower connecting plate, and the connecting screw is connected to the upper end of the connecting shaft of the earring through a tension and compression sensor.

[0008] In the above-mentioned strap tensile testing device, an annular groove is provided on the side wall of the positioning sleeve.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The utility model has a simple and compact structure, low cost and convenient operation; it is convenient to carry out tension tests on each band in real time at the production site, thereby ensuring product quality and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the main view of the present utility model.

[0012] Figure 2 It is a right view of the present utility model.

[0013] Figure 3 It is a three-dimensional diagram of the present utility model.

[0014] Figure 4 It is a three-dimensional diagram of the positioning sleeve of the present utility model.

[0015] Figure 5 It is a three-dimensional diagram of the lifting ring of the present utility model.

[0016] Figure 6 It is a three-dimensional diagram of the assembly of the strap positioning set when the utility model is in use.

[0017] Figure 7 It is a three-dimensional diagram of a hoop pin adopted when the utility model is used.

[0018] Figure 8 It is a three-dimensional diagram of the pull pin adopted when the utility model is used.

[0019] Figure 9 It is a three-dimensional diagram of the lifting lug adopted when the utility model is used. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] like Figure 1-5 As shown, the hoop tension test device of the present invention includes an upper connecting plate 1, an upper pull rod 2, a support plate 3, a lower connecting plate 4, three lower pull rods 5 (the number of the lower pull rods 5 is not limited to three, and can be two or more than three), an earring 6, a lifting ear 7, a snap ring 8, a positioning block 9, a base plate 10, a positioning sleeve 11, a hinge bolt 12, a pull screw 14, a hoop pin 15, a pull pin 16, a tension and compression sensor 17, a connecting screw 18, a jack 19, a lifting ring 20, a locking plate 21, a latch 22, a precision digital instrument 23 and a connecting block 24.

[0022] The lower pull rod 5 and positioning block 9 are fixedly mounted on the base plate 10, with the lower pull rod 5 positioned perpendicular to the base plate 10. The support plate 3 is mounted at the upper end of the lower pull rod 5, parallel to the base plate 10; the jack 19 is fixed to the support plate 3. The earring 6 includes a connecting shaft 24 and a lifting ring disposed at the lower end of the connecting shaft. The lower end of the connecting shaft 24 has a mounting groove. The lifting ring has a T-shaped structure, and the vertical beam of the lifting ring is placed in the mounting groove at the lower end of the connecting shaft 24. The lifting ring is connected by a latch 22 and then secured with a locking plate 21. A lifting ring hole 201 is provided at each end of the horizontal beam of the lifting ring 20.

[0023] The jack 19 can be fixed to the bottom surface of the support plate 3, with the output end of the jack 19 connected to the upper end of the earring's connecting shaft via a tension and compression sensor. Alternatively, the jack 19 can be mounted on the top surface of the support plate 3, with the output end of the jack 19 fixedly connected to the upper connecting plate 1. An upper pull rod 2 is connected to each end of the upper connecting plate 1. The upper pull rod 2 is parallel to the axis of the jack 19, and the lower end of the upper pull rod 2 passes through the support plate 3 and connects to the lower connecting plate 4. A connecting screw 18 is fixedly mounted in the middle of the lower connecting plate 4, and the connecting screw 18 is connected to the upper end of the connecting shaft of the earring 6 via a tension and compression sensor 17. A precision digital meter is connected to the tension and compression sensor to display the tensile force measured by the tension and compression sensor.

[0024] The sidewalls of the positioning sleeve 11 are provided with an annular groove 111. The positioning block 9 is a rectangular parallelepiped structure with a semicircular groove on its upper end. Two positioning blocks 9 are mounted parallel to each other on the base plate 10, with the semicircular grooves of the two positioning blocks 9 arranged coaxially. The positioning sleeve 11 is supported within the semicircular grooves of the two positioning blocks 9. A semicircular retaining ring 8 is mounted on the top of each positioning block 9 to circumferentially position the positioning sleeve 11.

[0025] When the utility model is used, the following steps are included:

[0026] 1) Install the hoop tension test device, keeping the positioning sleeve 11 and the retaining ring 8 in the uninstalled state.

[0027] 2) Place the band 13 into the shallow annular groove 111 of the positioning sleeve 11. One end of the band 13 is connected to a hanging eye of the earring 6 through the hanging ear 7 with two standard round pins 25. The other end of the band 13 is fixed with a band pin 15. The pull screw 14 passes through the through hole at the center of the band pin 15 and is threadedly connected to the pull pin 16. The pull pin 16 is placed in the other hanging eye of the earring 6 (see the attached figure for details). Figure 6 ).

[0028] 3) Place the positioning sleeve 11 with the strap 13 and earring 6 installed on the two positioning blocks 9, and use the hinge bolts 12 and washers to install the two retaining rings 8 on the two positioning blocks 9 respectively, and press them tightly on the positioning sleeve 1.

[0029] 4) Start the jack 19 to tighten the strap. The tension on the strap is transmitted to the precision digital instrument 23 through the tension and compression sensor 17. When the tension reaches the designed value, the hydraulic jack will no longer increase the tension and maintain this tension for 1.5-3 minutes. If the tension remains within the set tolerance, the strap quality is qualified.

[0030] 5) Remove the tension of the hydraulic jack 19 and remove the hoop, and the tension test is completed.

Claims

1. A strap tensile test device, characterized by: It includes a base plate, multiple lower pull rods, a support plate, a positioning block, a positioning sleeve, a snap ring, an earring and a jack; the lower pull rods and the positioning block are fixedly mounted on the base plate, and the lower pull rods are arranged perpendicular to the base plate; the support plate is mounted at the upper end of the lower pull rods, and the support plate is parallel to the base plate; the jack is fixed on the support plate; The positioning block is a rectangular structure with a semicircular groove on the upper end surface. The two positioning blocks are installed in parallel on the base plate, and the semicircular grooves of the two positioning blocks are coaxially arranged; the positioning sleeve is supported in the semicircular grooves of the two positioning blocks; a semicircular ring structured snap ring is installed on the top of each positioning block, and the snap ring positions the positioning sleeve circumferentially; the earring includes a connecting shaft and a lifting ring arranged at the lower end of the connecting shaft, and the lifting ring is provided with two lifting ring holes, which are respectively used to connect the two ends of the hoop; the upper end of the connecting shaft is connected to the output end of the jack through a tension and compression sensor.

2. The strap tensile testing device according to claim 1, characterized in that: It also includes a precision digital meter, which is connected to the tension and compression sensors.

3. The strap tensile testing device according to claim 1, characterized in that: The jack is installed on the top surface of the support plate, the output end of the jack is fixedly connected to the upper connecting plate, and the two ends of the upper connecting plate are respectively connected to an upper pull rod, the upper pull rod is parallel to the axis of the jack, and the lower end of the upper pull rod passes through the support plate and is connected to the lower connecting plate; a connecting screw is fixedly installed in the middle of the lower connecting plate, and the connecting screw is connected to the upper end of the connecting shaft of the earring through a tension and compression sensor.

4. The strap tensile testing device according to claim 1, characterized in that: An annular groove is provided on the side wall of the positioning sleeve.

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