CN215339208U

CN215339208U - Rubber band installation device

Info

Publication number: CN215339208U
Application number: CN202121213812.6U
Authority: CN
Inventors: 吴杨; 黄俊刚; 吴毅航; 徐刚敏; 廖静容; 李能
Original assignee: Guangzhou University
Current assignee: Guangzhou University
Priority date: 2021-06-01
Filing date: 2021-06-01
Publication date: 2021-12-28
Anticipated expiration: 2031-06-01

Abstract

The utility model discloses a rubber band installation device, which relates to the technical field of resonant column test equipment and comprises an annular kit, wherein the annular kit is used for surrounding a rubber membrane and comprises a plurality of connectors; and the fasteners are arranged at the lower part of the annular sleeve and penetrate through the annular sleeve to press the rubber film sleeved on the metal base, so that the annular sleeve is fixed and the rubber film is fastened on the metal base. Above-mentioned technical scheme, through designing annular external member, and fix through the fastener, both can fix annular external member on the one hand, on the other hand, can be again with the rubber membrane fastening on metal base, the rubber band can overlap on annular external member, then down remove, finally the hoop is in metal base department, the in-process that moves down at the rubber band just need not worry experimenter's hand or the rubber band of atress can touch the rubber membrane when tying up the rubber band and lead to the rubber membrane to warp or destroy.

Description

Rubber band installation device

Technical Field

The utility model relates to the technical field of resonance column test equipment, in particular to a rubber band installation device.

Background

The resonance column tester is a test which applies an excitation on a cylindrical sample according to the resonance principle, changes the vibration frequency to make the sample produce resonance, and thereby measures the parameters of the sample such as the dynamic elastic modulus, the damping ratio and the like. The method is widely applied to research on the dynamic characteristics of the soil in a small strain range. The instrument is very precise, the pressure difference between the inside and the outside of the sample needs to be strictly controlled in the test process, so that the sample is ensured to have good tightness, many measures in the prior operation are designed for meeting the requirement, for example, before a rubber latex film is sleeved on a metal base, a layer of vaseline with proper thickness needs to be uniformly coated on the edge of the metal base in advance, and the vaseline is good substance for sealing and water insulation because the vaseline has good water impermeability and non-hydrophilicity. Then, the rubber latex film sleeved on the metal base is pressed by hands uniformly and forcefully, so that the rubber latex film and the rubber latex film can be firmly attached at the contact position, and the tightness of the sample is further improved. Then, a plurality of rubber bands are sleeved on the part of the rubber film, which is tightly attached to the metal base, and finally a layer of vaseline is uniformly coated on the surfaces of the rubber bands to achieve a sealing condition. The entire rubber band process is centered around increasing the sample tightness. If the tightness of the sample cannot be ensured, the inside and the outside of the sample are communicated, and water and gas leakage occurs. The experiment is fatal, because you can't provide a pressure differential environment for the sand sample, because backpressure instrument and confined pressure all provide pressure through inhaling (discharging) air or water, if the sample leaks gas and leaks water, can let backpressure instrument applyed or confined pressure instrument applyed all unpredictable's pressure value, make the experiment can not develop. Although the aforesaid test scheme increases the tightness of the sample to a certain extent, how to cover the rubber band does not affect the rubber membrane, how to ensure whether the position of the rubber band is horizontal, how to improve the quality of the rubber band, and the like, still need to be discussed and solved further.

The rubber band is tied up to prior art can appear because the experimenter is not good because the dynamics of tensile rubber band is mastered when carrying out usually, tensile area after the rubber band is stretched out is not big enough, perhaps the in-process of slowly descending along the direction of rubber membrane after tensile carelessly exert oneself too violently to lead to the rubber band by phenomenons such as being pulled apart, the rubber band shrink that also exerts oneself the undersize and lead to probably leading to the rubber membrane to be pulled askew or even destroy, no matter be triaxial test or resonance post test, if because the position of rubber band hoop is improper or because the damage or the deformation that has leaded to the rubber membrane when tying up the rubber band, probably lead to the sample gas leakage that leaks, and then make the experiment fail.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the embodiment of the utility model provides a rubber band mounting device which can improve the quality of rubber band sleeving and improve the success rate of experiments.

The rubber band installation device comprises an annular sleeve, wherein the annular sleeve is used for surrounding a rubber film and comprises a plurality of connecting bodies; and the fasteners are arranged at the lower part of the annular sleeve and penetrate through the annular sleeve to press the rubber film sleeved on the metal base, so that the annular sleeve is fixed and the rubber film is fastened on the metal base.

In an alternative or preferred embodiment, the connecting body is a vertically arranged cylindrical rod, and the annular set further comprises at least one collar connecting each cylindrical rod so as to surround each cylindrical rod on the periphery of the rubber membrane.

In an alternative or preferred embodiment, the cylindrical rod is provided with a cylindrical rod concave position for the lantern ring to be clamped in, and the lantern ring is provided with a lantern ring convex position corresponding to the cylindrical rod concave position.

In an alternative or preferred embodiment, the collar is a magnetic metal member, and the cylindrical rod is provided with a magnetic attraction at the concave position to attract and fix the collar.

In an alternative or preferred embodiment, the number of the lantern rings is two, and the concave position of the upper cylindrical rod is downward, and the concave position of the lower cylindrical rod is upward.

In an alternative or preferred embodiment, the collar is fitted with a level gauge.

In an alternative or preferred embodiment, the bottom of the cylindrical bar is provided with an arc-shaped chamfer.

In an alternative or preferred embodiment, the cylindrical rod is provided with a telescopic bayonet.

In an optional or preferred embodiment, the fastening element is a screw, at least one of the collars is disposed on the periphery of the metal base, and the collar disposed on the periphery of the metal base is provided with a screw hole for screwing the fastening element into.

In an alternative or preferred embodiment, the fastener is in the shape of a circular arc pressed against one end of the rubber membrane.

Based on the technical scheme, the embodiment of the utility model at least has the following beneficial effects: above-mentioned technical scheme, through designing annular external member, and fix through the fastener, both can fix annular external member on the one hand, on the other hand, can be again with the rubber membrane fastening on metal base, the rubber band can overlap on annular external member, then down remove, finally the hoop is in metal base department, the in-process that moves down at the rubber band just need not worry experimenter's hand or the rubber band of atress can touch the rubber membrane when tying up the rubber band and lead to the rubber membrane to warp or destroy.

Drawings

The utility model is further described below with reference to the accompanying drawings and examples;

FIG. 1 is a schematic view of a tendon used in a resonant column experiment according to an embodiment of the present invention;

FIG. 2 is a front view of an embodiment of the present invention;

FIG. 3 is a schematic view of a snap fit of a cylindrical rod and collar in an embodiment of the utility model;

fig. 4 is a top view of an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1, a resonant column experimental apparatus is shown, which comprises a confining pressure machine 11 and a back pressure saturation machine 12, wherein the confining pressure machine 11 is connected with a resonant column pressure chamber 13, the resonant column pressure chamber 13 can move downwards and is used for sealing a sample on a metal base 17, the metal base 17 is sleeved with a rubber membrane 18, the back pressure saturation machine 12 is communicated with the resonant column pressure chamber 13 through a water inlet valve 14, in addition, a first water outlet valve 15 is arranged to be communicated with the inside of the sample, and a second water outlet valve 16 is arranged in the resonant column pressure chamber 13. The part is the existing resonant column experimental instrument, and the specific principle is not described in detail.

Referring to fig. 2 to 4, an elastic band installation device includes a ring-shaped sleeve 20 and a plurality of fasteners 31.

Wherein the annular sleeve 20 is used to enclose the rubber membrane 18, and the annular sleeve 20 comprises a plurality of connectors. Specifically, the connecting body is vertically arranged columnar bars 21, the columnar bars 21 are disposed at a distance from each other, and the columnar bars 21 are specifically cylindrical, as shown in fig. 4, so as to enclose the rubber film 18.

A fastener 31 is provided at the lower portion of the annular sleeve 20, and the fastener 31 passes through the annular sleeve 20 to press the rubber membrane 18 fitted over the metal base, thereby fixing the annular sleeve 20 and fastening the rubber membrane 18 to the metal base 17.

Above-mentioned technical scheme, through design annular external member 20 to fix through fastener 31, both can fix annular external member 20 on the one hand, on the other hand can be with rubber membrane 18 fastening on metal base 17 again, the rubber band can overlap on annular external member, then moves down, finally hoop in metal base 17 department, just need not worry experimenter's hand or when tying up the rubber band at the in-process that the rubber band moved down, the rubber membrane 18 can be touched and lead to rubber membrane 18 to warp or destroy to the rubber band of atress.

Referring to fig. 2 and 3, the annular set 20 further comprises at least one collar 24, the collar 24 connecting each cylindrical rod 21 so as to surround each cylindrical rod 21 around the rubber membrane 18. The lantern ring 24 is made of stainless steel, has an inner diameter of 6.5cm and an outer diameter of 7.5cm, and is used for fixing the relative positions of the six cylindrical rods 21.

Specifically, the cylindrical rod 21 is provided with a cylindrical rod concave position 22 for the collar 24 to be clamped in, and the collar 24 is provided with a collar convex position 25 corresponding to the cylindrical rod concave position 22. The collar 24 is a magnetic metal component, and the cylindrical rod concave position 22 is provided with a magnetic attraction 23 to attract and fix the collar 24. Furthermore, the lantern rings 24 are arranged in two, in the cylindrical rod 21, the cylindrical rod concave position 22 on the upper portion is arranged downwards, and the cylindrical rod concave position 22 on the lower portion is arranged upwards, so that the connection stability of the lantern rings 24 and the cylindrical rod 21 can be further enhanced.

In this embodiment, the fastening member 31 is a screw, specifically a hexagonal screw, at least one collar 24 is disposed on the periphery of the metal base 17, and the collar 24 disposed on the periphery of the metal base 17 is provided with a screw hole for screwing the fastening member 31 in. The fastener 31 is pressed against one end of the rubber film 18 and is arc-shaped, and the relative position between the metal base 17 and the rubber film 18 can be fixed by tightening the fastener 31, so that the rubber film 18 cannot slide or move relatively at the metal base 17. It can be understood that, taking the first rubber band sleeving step of the resonance column experiment as an example, the specific operations are as follows:

the collar 21 with the threaded holes is first lowered through the rubber membrane 18 to a position where the rubber membrane 18 abuts the metal base 17, which may be slightly elevated to reserve sufficient space for the cylindrical rod 21. The second step, lantern ring 24 is installed with horizontal calibration meter 26, whether the blister in the horizontal calibration meter 26 of observing lantern ring 21 middle part is the centering, can guarantee that each cylindricality stick 21 is on same horizontal plane, reduce the askew emergence of rubber band cover or position slope phenomenon in the at utmost, lantern ring 24 adjusts to and screws up fastener 31 behind the blister centering, because the tip of hexagonal screw is circular-arc, can not cause destruction to rubber membrane 18 at the in-process of screwing up, it can to fix with metal base 17 to screw up to rubber membrane 18. And thirdly, butting the lower-layer cylindrical rod concave position 22 of the six cylindrical rods 21 made of the aluminum alloy material with the lantern ring convex position 25 of the lantern ring 24, and tightly sucking the magnetic force absorption 23. The fourth step is to pass the upper collar 24 through the rubber membrane 18 so that its collar protrusions 25 engage the cylindrical rod recesses 22 of the cylindrical rod 21, it being noted that the upper and lower collar protrusions 25 point upwards and downwards respectively. Finally, the cylindrical rod 21 is provided with a telescopic clamping joint 27, and the length of the cylindrical rod 21 is controlled by adjusting the telescopic clamping joint 27, so that the position of the bottom of the cylindrical rod 21 sleeved with the rubber band is found. After the rubber band installation device is installed, the rubber band is stretched to enable the rubber band to penetrate through the periphery of a ring formed by the cylindrical rod 21, the rubber band is fixed on the surface of the cylindrical rod 21 firstly, the rubber band is slowly and downwards slid to the bottom of the cylindrical rod 21 when the rubber band is observed to be horizontal, the rubber band continues to slide downwards to enable the rubber band to slide onto the rubber film 18, an arc-shaped chamfer is arranged at the bottom of the cylindrical rod 21, on one hand, the rubber band smoothly slides off, and on the other hand, the rubber band is prevented from being cut. The operation of the upper band can be repeated by only adjusting the telescopic clamping section of the lower layer to adjust the sliding height of the rubber band.

In this embodiment, the horizontal calibrator 26 installed on the lantern ring 24, the rubber band covered on the surface of the cylindrical rod 21 can also clearly see whether the position of the rubber band is horizontal or inclined, so that the position of the rubber band falling on the latex film is relatively horizontal, the quality of the step of the rubber band covering is improved to a great extent, and in order to protect the rubber film and the instrument, the possibility that the rubber film is punctured and the instrument is scratched is avoided. In order to make the density of the rubber band more even, the telescopic clamping joint 27 arranged between the middle section and the lower section of the cylindrical rod can adjust the horizontal height of the bottom of the telescopic length adjustment of the lower section of the cylindrical rod 21, and the rubber band at any horizontal height can be sleeved, so that the density of the sleeved rubber band is uniform enough, the distance between the two rubber bands can be controlled, the sample tightness is guaranteed, and the success rate of the test is increased.

For the existing triaxial experiment and resonant column experiment, the sample has insufficient tightness caused by insufficient quality of the rubber band sleeve or errors in the rubber band sleeve process, and the result also shows that data made by the test with poor quality of the rubber band sleeve is infeasible, and even the preset confining pressure and back pressure value can not be applied to the sample in the experiment process. The cylindrical rod 21 is made of aluminum alloy materials, the lantern ring 24 is made of stainless steel, the fastener 31 is made of epoxy resin polymer materials, manufacturing materials are convenient to obtain, the device is simple in structure, components are easy to manufacture, and the device is suitable for mass production.

Rubber band installation device in this embodiment can improve the quality of cover rubber band, makes the seal of sample reach the requirement that needs, has reduced experimental failure rate, slows down backpressure saturator and manpower burden, and the price/performance ratio is high, has great meaning to the experiment. In addition, for laboratory underground system researchers, as long as experiments for measuring soil dynamic characteristics such as triaxial experiments, resonant column experiments and bending element experiments are carried out, the steps of sleeving rubber bands cannot be avoided, which are the experimental steps faced by each sample, and the requirements are high. Meanwhile, the device has wide applicability, can be used for most geotechnical tests, can be used as one part of equipment matching, and has wide development space.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. The utility model provides a rubber band installation device which characterized in that: comprises that

-an annular sleeve (20), said annular sleeve (20) being intended to enclose a rubber membrane (18), said annular sleeve (20) comprising a number of connectors; and

a plurality of fasteners (31), the fasteners (31) are arranged at the lower part of the annular sleeve (20), and the fasteners (31) penetrate through the annular sleeve (20) to press the rubber membrane (18) sleeved on the metal base so as to fix the annular sleeve (20) and fasten the rubber membrane (18) on the metal base (17).

2. The elastic band installation device of claim 1, wherein: the connecting body is a vertically arranged cylindrical rod (21), the annular sleeve (20) further comprises at least one lantern ring (24), and the lantern ring (24) connects the cylindrical rods (21) so as to enclose the cylindrical rods (21) on the periphery of the rubber membrane (18).

3. The elastic band installation device of claim 2, wherein: the cylindrical rod (21) is provided with a cylindrical rod concave position (22) for the lantern ring (24) to be clamped in, and the lantern ring (24) is provided with a lantern ring convex position (25) matched with the cylindrical rod concave position (22).

4. A bungee cord installation device according to claim 3, wherein: the lantern ring (24) is a magnetic metal component, and the cylindrical rod concave position (22) is provided with a magnetic attraction (23) so as to attract and fix the lantern ring (24).

5. The elastic band installation device of claim 4, wherein: the lantern ring (24) sets up two altogether, in the cylindricality stick (21), be located upper portion cylindricality stick concave position (22) sets up downwards, be located the lower part cylindricality stick concave position (22) sets up upwards.

6. The elastic band installation device of claim 2, wherein: the collar (24) is fitted with a level gauge (26).

7. The elastic band installation device of claim 2, wherein: the bottom of the cylindrical rod (21) is provided with an arc chamfer.

8. The elastic band installation device of claim 2, wherein: the cylindrical rod (21) is provided with a telescopic clamping section (27).

9. A bungee attachment device according to any of claims 2 to 8, wherein: the fastening piece (31) is a screw, at least one lantern ring (24) is arranged on the periphery of the metal base (17), and the lantern ring (24) arranged on the periphery of the metal base (17) is provided with a screw hole for screwing the fastening piece (31).

10. The elastic band installation device of claim 9, wherein: the fastener (31) is pressed against one end of the rubber film (18) and is in an arc shape.