CN219624789U - Embedded protection device of assembled concrete strain gauge - Google Patents

Abstract

An embedded protection device of an assembled concrete strain gauge comprises a U-shaped protection cover and a plurality of fixing bolts; a plurality of longitudinal fixing holes are formed in the U-shaped protective cover; the U-shaped bottom of the U-shaped protective cover is transversely accommodated, the concrete strain gauge is fixed by means of a fixing bolt penetrating through a fixing hole at the lower part, and a sensor of the concrete strain gauge is covered in the U-shaped protective cover; the top opening of the U-shaped protection cover transversely accommodates the reinforcing steel bars and is fixed by fixing bolts penetrating through the fixing holes at the upper part. Therefore, the concrete strain gauge can be fixed at the U-shaped bottom of the U-shaped protective cover, and the sensor is protected by the cover, so that the strain gauge is prevented from being damaged in the casting and vibrating process of concrete, the electronic element is protected, and the connection part of the lead is protected, so that the accuracy of data is enhanced. Meanwhile, the U-shaped protection covers are fixed on the steel bars in a spaced connection mode, and are not in contact with the steel bars, so that the influence of the steel bars on the measurement data of the concrete strain gauge is avoided.

Description

Embedded protection device of assembled concrete strain gauge

Technical Field

The utility model relates to the technical field of concrete strain gauges, in particular to an embedded protection device for an assembled concrete strain gauge.

Background

The concrete strain gauge is mainly used for detecting the stress and the strain of a concrete structure, the embedded strain gauge is generally adopted in engineering and comprises an end head, a dowel bar, a sensor and a wire, two ends of the sensor are respectively connected with the dowel bars, one end head is connected with the other end of each dowel bar, the wire is connected with the sensor, and the wire is used for transmitting measurement data. The measuring method comprises the steps of binding a concrete strain gauge on one of the main ribs, pouring or spraying concrete, stretching or compressing the ends of the concrete strain gauge due to the fact that the concrete strain gauge is buried in the concrete, transmitting force to the sensor through the dowel bar, and finally transmitting measuring data through a wire.

The existing concrete strain gauge is tied to the steel bar by using a tie or a steel wire, and then concrete is poured outside the steel bar. Because the concrete strain gauge is easy to damage in the pouring or vibrating process, the cable tie or the steel wire can be loose and displaced, so that the stress strain of the concrete structure cannot be accurately detected. And some concrete strain gauges are fixed on the steel bars through welding, but the welding can cause insufficient environmental protection of a construction site, and meanwhile, the distance between the concrete strain gauges and the steel bars is too short, so that the measurement data of the concrete strain gauges are influenced by the stress and the strain of the main steel bars, and the real stress and the strain of a concrete structure can not be measured.

There are thus also many mounting devices available, such as a concrete strain gauge mounting bracket as disclosed in chinese patent CN201921747929.5, which can avoid too close a distance between the concrete strain gauge and the steel bar, and avoid the influence of the main bar on the measured value of the concrete strain gauge, but without protection, there is still the defect that the concrete strain gauge is easily damaged.

Disclosure of Invention

The utility model aims to provide an embedded protection device for an assembled concrete strain gauge, which has the advantages of protecting the concrete strain gauge and ensuring accurate detection data.

In order to achieve the above object, the solution of the present utility model is:

an embedded protection device of an assembled concrete strain gauge comprises a U-shaped protection cover and a plurality of fixing bolts; a plurality of longitudinal fixing holes are formed in the U-shaped protective cover; the U-shaped bottom of the U-shaped protective cover is transversely accommodated, the concrete strain gauge is fixed by means of a fixing bolt penetrating through a fixing hole at the lower part, and a sensor of the concrete strain gauge is covered in the U-shaped protective cover; the top opening of the U-shaped protection cover transversely accommodates the reinforcing steel bars and is fixed by fixing bolts penetrating through the fixing holes at the upper part.

Further, the U-shaped bottom is an arc-shaped long groove which is arranged at the bottom of the U-shaped protective cover and transversely extends towards the left and right directions, two fixing plates are vertically extended upwards from two long edges of the arc-shaped long groove respectively, and the two fixing plates are mutually spaced front and back and are parallel; the top of two fixed plates forms the opening of U type safety cover, is the fretwork area that link up about between two fixed plates.

Further, the length of the arc-shaped long groove is smaller than that of the concrete strain gauge and larger than that of the sensor of the concrete strain gauge.

Further, the fixing holes are divided into an upper fixing hole and a lower fixing hole; the upper fixing hole and the lower fixing hole respectively longitudinally penetrate through the front fixing plate and the rear fixing plate of the U-shaped protective cover; the upper fixing holes are arranged at least two, and are arranged at the upper part of the U-shaped protective cover at left and right intervals and close to the opening; at least two lower fixing holes are also arranged, and the lower fixing holes are positioned at the upper part of the U-shaped protective cover and close to the arc-shaped long groove; two fixing bolts are arranged in the upper fixing holes in a penetrating way and used for fixing the reinforcing steel bars; and a fixing bolt is arranged in the lower fixing hole in a penetrating way and is used for being matched with the arc-shaped long groove to fix the concrete strain gauge.

Further, the upper fixing hole and the lower fixing hole are elongated holes extending in the vertical direction, the elongated holes are arranged in parallel, and the lower end of the upper fixing hole is higher than the upper end of the lower fixing hole.

Further, a damping cushion is arranged at the bottom of the arc-shaped long groove.

Further, a slot which is vertically penetrated is arranged at the middle or edge position of the bottom of the arc-shaped long slot.

Further, the fixing bolt is made of damping materials.

Further, the concrete strain gauge further comprises an extension protection rod, wherein the extension protection rod is used for being installed at the end position of the concrete strain gauge.

Furthermore, one end of the extension protection rod is provided with a buckling part, the buckling part is in a fan shape, a semicircular buckling groove with a downward opening is formed between the buckling part and the extension protection rod main body, so that the end head of the concrete strain gauge is contained in the buckling groove, and the fan-shaped inner diameter part of the buckling part is bent and clamped at the joint of the end head and the force transmission rod; and a damping structure is arranged between the end head and the buckling groove.

After the technical scheme is adopted, the device can fix the concrete strain gauge at the U-shaped bottom of the U-shaped protective cover, and the sensor is covered and protected, so that the damage of the strain gauge caused by the concrete in the pouring and vibrating process can be prevented, the electronic element is protected, and the connection part of the lead is protected, so that the accuracy of data is enhanced. Meanwhile, the U-shaped protection covers are fixed on the steel bars in a spaced connection mode, and are not in contact with the steel bars, so that the influence of the steel bars on the measurement data of the concrete strain gauge is avoided.

The device has wide application field and can be used in the whole fields of house construction, tunnels, roads and bridges and the like. Meanwhile, the device is convenient to install and free of welding.

Drawings

Fig. 1 is a front view of embodiment 1 of the present utility model.

Fig. 2 is a cross-sectional view of example 1 of the present utility model.

Fig. 3 is a side view of embodiment 1 of the present utility model.

Fig. 4 is a cross-sectional view at A-A of fig. 1.

Fig. 5 is a front view of embodiment 2 of the present utility model.

Fig. 6 is a partial cross-sectional view of embodiment 2 of the present utility model.

Fig. 7 is another partial cross-sectional view of embodiment 2 of the present utility model.

Fig. 8 is a schematic view of an inner cushion sheet of embodiment 2 of the present utility model.

Fig. 9 is a schematic view of an outer cushion of embodiment 2 of the present utility model.

Fig. 10 is a cross-sectional view of embodiment 3 of the present utility model.

Symbol description: the U-shaped protective cover 1, a fixing bolt 2, a screw part 21, a fixing hole d, an upper fixing hole d1, a U-shaped bottom part a, an opening b, a hollowed-out area c, an arc-shaped long groove 11, a slot 111, a fixing plate 12, an upper fixing hole 121, a lower fixing hole 122, a concrete strain gauge 3, a sensor 31, a wire 32, a dowel bar 33, a head 34, a reinforcing steel bar 4, a cushion 5, an extension protective bar 6, a buckling part 61, an inner diameter part 611, a buckling groove 62, an inner side soft gasket 71, an outer side soft gasket 72 and a relief hole 721.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

In the description of the embodiments of the present utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship conventionally put in place when the application product is used, or the orientation or positional relationship conventionally understood by those skilled in the art is merely for convenience of describing the present utility model and simplifying the description, and is not indicative or implying that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present utility model, the meaning of "a number" is two or more, unless explicitly defined otherwise.

In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.

In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Example 1

As shown in fig. 1 to 4, the embedded protection device for the assembled concrete strain gauge is used for assembling the concrete strain gauge 3 and comprises a U-shaped protection cover 1 and a plurality of fixing bolts 2, wherein a plurality of longitudinal fixing holes d are formed in the U-shaped protection cover 1.

The U-shaped bottom a of the U-shaped protective cover 1 is transversely accommodated, the concrete strain gauge 3 is fixed by means of the fixing bolt 2 penetrating through the fixing hole d at the lower part, and the sensor 31 of the concrete strain gauge 3 is covered in the U-shaped protective cover 1;

the top opening b of the U-shaped protection cover 1 transversely accommodates the reinforcing steel bar 4 and is fixed by the fixing bolt 2 passing through the fixing hole d at the upper part.

Therefore, the concrete strain gauge 3 is fixed at the bottom of the U-shaped protective cover 1, the sensor 31 is covered and protected, the concrete strain gauge 3 is prevented from being damaged in the pouring and vibrating process, the electronic elements (sensors) are protected, and the connection positions of the leads 32 are protected, so that the accuracy of data is enhanced. Meanwhile, the U-shaped protection covers 1 are fixedly connected to the steel bars 4 at intervals, and are not contacted with the steel bars 4, so that the influence of the steel bars 4 on the measurement data of the concrete strain gauge 3 is avoided.

Specifically, the U-shaped bottom a is an arc-shaped long groove 11 which is arranged at the bottom of the U-shaped protective cover 1 and extends transversely in the left-right direction, and two fixing plates 12 vertically extend upwards from two long sides of the arc-shaped long groove 11 respectively, wherein the two fixing plates 12 are spaced front and back and are parallel to each other.

The top of the two fixing plates 12 forms an opening b of the U-shaped protective cover 1, and a hollow area c which is penetrated left and right is arranged between the two fixing plates 12.

The arc-shaped long groove 11 and the side sections of the two fixing plates 12 form the U shape, namely the U-shaped protection cover 1 can be formed by bending plates, and the production process is simple.

The U-shaped protective cover 1 is provided with a plurality of fixing holes d which can be divided into an upper fixing hole 121 and a lower fixing hole 122; the upper fixing hole 121 and the lower fixing hole 122 respectively longitudinally penetrate through the front fixing plate 12 and the rear fixing plate 12 of the U-shaped protection cover 1, the upper fixing hole 121 and the lower fixing hole 122 are long-strip holes extending in the up-down direction, the long-strip holes are mutually parallel, and the lower end of the upper fixing hole 121 is higher than the upper end of the lower fixing hole 122.

The upper fixing holes 121 are arranged at least two, and are arranged at the upper part of the U-shaped protective cover 1 close to the opening b at left and right intervals; the number of the lower fixing holes 122 is at least two, and the lower fixing holes 122 are positioned at the upper part of the U-shaped protection cover 1 and close to the arc-shaped long groove 11.

Two fixing bolts 2 are arranged in the upper fixing holes 121 in a penetrating way and are used for fixing the reinforcing steel bars 4; a fixing bolt 2 is inserted into the lower fixing hole 122 and is used for fixing the concrete strain gauge 3 in cooperation with the arc-shaped long groove 11.

The length of the arc-shaped long groove 11 is smaller than that of the concrete strain gauge 3, but is larger than that of the sensor 31, and the width of the opening b is larger than the diameter of the concrete strain gauge 3 and the diameter of the steel bar 4, so that when the concrete strain gauge 3 is transversely arranged in the arc-shaped long groove 11, the outer sides of the two dowel bars 33 and the two ends 34 of the concrete strain gauge 3 can be exposed, force transmission of the ends 34 is not affected, and meanwhile, electronic elements such as the sensor 31 in the middle of the concrete strain gauge 3 can be protected.

When the concrete strain gauge 3 is used, after the sensor 31 and the lead 32 are transversely arranged in the middle of the arc-shaped long groove 11, the two fixing bolts 2 respectively penetrate through the two lower fixing holes 122 longitudinally front and back, and the concrete strain gauge 3 is transversely and longitudinally fixed and limited in the arc-shaped long groove 11 through the transverse arc-shaped long groove 11 and the screw rod part 21 of the longitudinal fixing bolt 2, so that the concrete strain gauge 3 is prevented from running and shifting up and down.

Meanwhile, a damping cushion 5 can be arranged at the bottom of the arc-shaped long groove 11 to protect and damp the concrete strain gauge 3 to a certain extent.

After the concrete strain gauge 3 is fixedly arranged in the arc-shaped long groove 11, the transverse accommodating steel bar 4 at the position of the opening b of the U-shaped protective cover 1 is fixedly connected.

Two fixing bolts 2 are arranged in each upper fixing hole 121 at intervals up and down, the distance between the two fixing bolts 2 is adjusted to clamp the steel bar 4, so that the U-shaped protective cover 1 can be firmly and fixedly connected to the steel bar 4 through the four fixing bolts 2 in the two upper fixing holes 121, and meanwhile, the steel bar 4 and the concrete strain gauge 3 can be kept parallel to each other and spaced apart from each other, so that the stress direction of the concrete strain gauge 3 and the steel bar 4 is the same.

And during installation, two fixing bolts 2 with four fixing bolts 2 positioned above can be propped against the upper end of each upper fixing hole 121, so that the distance between the reinforcing steel bar 4 and the concrete strain gauge 3 is increased, and the influence of the strain of the reinforcing steel bar 4 on the measurement of the concrete strain gauge 3 on the concrete is further avoided.

After the concrete strain gauge 3 is installed and the U-shaped protective cover 1 is fixedly connected to the reinforcing steel bar 4, the lead 32 of the concrete strain gauge 3 can be led out of the U-shaped protective cover 1 and can be fixed along the reinforcing steel bar 4, when concrete is poured, the concrete strain gauge 3 is firmly fixed by the fixing bolt 2 and the arc-shaped long groove 11, meanwhile, an electronic element in the middle part can be covered by the U-shaped protective cover 1 for protection, damage and deflection in the pouring vibration process can be avoided, meanwhile, concrete can enter the U-shaped protective cover 1 from the hollowed-out area c to be contacted with the sensor 31, the concrete strain gauge 3 is fully contacted with the concrete and stressed jointly, adverse effects of temperature on the sensor 31 of the concrete strain gauge 3 are reduced, and accuracy of measured data is ensured.

A slot 111 penetrating up and down can be arranged at the middle position of the bottom of the arc-shaped long slot 11, so that concrete can be contacted with the sensor 31 from the slot 111, and temperature errors are reduced.

Because the upper fixing hole 121 and the lower fixing hole 122 are elongated holes in the vertical direction, the fixing bolts 2 can be adjusted to adapt to the concrete strain gauges 3 and the reinforcing steel bars 4 with different sizes, so that the universality of the embedded protection device is improved, the reverse and forward die opening manufacturing is not needed, and the production and manufacturing cost is reduced.

The fixing bolt 2 may be made of a shock absorbing material, for example, polyurethane material, so as to reduce stress and ensure fixing effect.

This embodiment is applicable to both the concrete strain gauges 3 of the sensor 31 in the middle and in the ends.

Example 2

As shown in fig. 5 to 9, the present embodiment 2 is basically the same in structure as the above-described embodiment 1, with the main difference that two extension protection bars 6 are also included.

The extension protection rod 6 is used for being arranged at the position of the end 34 of the concrete strain gauge 3, one end of the extension protection rod 6 is provided with a buckling part 61, the buckling part 61 is in a fan shape, a semicircular buckling groove 62 with a downward opening b is formed between the buckling part 61 and the main body of the extension protection rod 6, so that the end 34 can be accommodated in the buckling groove 62, and the fan-shaped inner diameter part 611 of the buckling part 61 is bent and clamped at the joint of the end 34 and the dowel bar 33 for fixing; through setting up extension protection pole 6, can further protect end 34, avoid end 34 to be damaged by vibrating rod vibrations, can guarantee concrete strain gauge 3 abundant atress simultaneously, guarantee the precision.

The extension protection rod 6 is made of metal.

And a shock absorbing structure can be arranged between the end head 34 and the buckling groove 62 to reduce stress and further protect the end head 34. The damping structure may be two cushion pieces respectively disposed on two sides of the end 34, wherein the inner soft cushion piece 71 is a circular cushion piece, the middle of the outer soft cushion piece 72 is provided with a yielding hole 721 for yielding the force transmission rod 33, and of course, the damping structure may also be a damping soft sleeve (not shown) and may be directly wrapped on the end 34.

Example 3

As shown in fig. 10, the structure of this embodiment 3 is basically the same as that of the above-mentioned embodiment 1, and the main difference is that, in this embodiment, based on embodiment 1, the end portion of the wire 32 with the sensor 31 is located in the arc-shaped long groove 11, and the other end portion with the end 34 is located outside the arc-shaped long groove 11, and the slot 111 at the bottom of the arc-shaped long groove 11 is located at any edge of the left and right sides, so that the electronic components such as the sensor 31 can be protected by the U-shaped protection cover 1, and a better measurement effect is achieved.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that equivalent changes and modifications can be made by those skilled in the art without departing from the principles of the present utility model, which still falls within the scope of the present utility model.

Claims (10)

1. An embedded protection device of an assembled concrete strain gauge is characterized in that:

comprises a U-shaped protective cover and a plurality of fixing bolts;

a plurality of longitudinal fixing holes are formed in the U-shaped protective cover;

the U-shaped bottom of the U-shaped protective cover is transversely accommodated, the concrete strain gauge is fixed by means of a fixing bolt penetrating through a fixing hole at the lower part, and a sensor of the concrete strain gauge is covered in the U-shaped protective cover;

the top opening of the U-shaped protection cover transversely accommodates the reinforcing steel bars and is fixed by fixing bolts penetrating through the fixing holes at the upper part.

2. The fabricated concrete strain gage embedded protection device of claim 1, wherein:

the U-shaped bottom is an arc-shaped long groove which is arranged at the bottom of the U-shaped protective cover and transversely extends towards the left and right directions, two fixing plates vertically extend upwards from two long edges of the arc-shaped long groove respectively, and the two fixing plates are spaced front and back and are parallel to each other;

the top of two fixed plates forms the opening of U type safety cover, is the fretwork area that link up about between two fixed plates.

3. The fabricated concrete strain gage embedded protection device of claim 2, wherein:

the length of the arc-shaped long groove is smaller than that of the concrete strain gauge and larger than that of the sensor of the concrete strain gauge.

4. The fabricated concrete strain gage embedded protection device of claim 2, wherein:

the fixing holes are divided into an upper fixing hole and a lower fixing hole; the upper fixing hole and the lower fixing hole respectively longitudinally penetrate through the front fixing plate and the rear fixing plate of the U-shaped protective cover;

the upper fixing holes are arranged at least two, and are arranged at the upper part of the U-shaped protective cover at left and right intervals and close to the opening; at least two lower fixing holes are also arranged, and the lower fixing holes are positioned at the upper part of the U-shaped protective cover and close to the arc-shaped long groove;

two fixing bolts are arranged in the upper fixing holes in a penetrating way and used for fixing the reinforcing steel bars; and a fixing bolt is arranged in the lower fixing hole in a penetrating way and is used for being matched with the arc-shaped long groove to fix the concrete strain gauge.

5. The fabricated concrete strain gage embedded protection device of claim 4, wherein: the upper fixing holes and the lower fixing holes are elongated holes extending in the vertical direction, the elongated holes are arranged in parallel, and the lower ends of the upper fixing holes are higher than the upper ends of the lower fixing holes.

6. The fabricated concrete strain gage embedded protection device of claim 2, wherein: and a damping cushion is arranged at the bottom of the arc-shaped long groove.

7. The fabricated concrete strain gage embedded protection device of claim 2, wherein: and a slot which is vertically communicated is arranged at the middle or edge position of the bottom of the arc-shaped long slot.

8. The fabricated concrete strain gage embedded protection device of claim 1, wherein: the fixing bolt is made of damping materials.

9. The fabricated concrete strain gage embedded protection device of claim 1, wherein: the concrete strain gauge further comprises an extension protection rod, wherein the extension protection rod is used for being installed at the end position of the concrete strain gauge.

10. The fabricated concrete strain gage embedded protection device of claim 9, wherein: one end of the extension protection rod is provided with a buckling part, the buckling part is in a fan shape, a semicircular buckling groove with a downward opening is formed between the buckling part and the extension protection rod main body, so that the end head of the concrete strain gauge is contained in the buckling groove, and the fan-shaped inner diameter part of the buckling part is abducted and clamped at the joint of the end head and the force transmission rod; and a damping structure is arranged between the end head and the buckling groove.