CN214334524U - Chain connecting structure for connecting loading plate and device adapting to eccentric loading of duct piece - Google Patents

Abstract

The application discloses a chain connection structure for connecting loading plate, chain connection structure includes the chain, the both ends of chain articulate respectively has an adjustment double-screw bolt, it has the external screw thread to open on the adjustment double-screw bolt, ordinary nut and safety nut screw in proper order the external screw thread, and both looks butt, ordinary nut with it is equipped with dish spring subassembly still to overlap between the chain tip. The device comprises three loading plates, and the two connected loading plates are connected through the chain connecting structure.

Description

Chain connecting structure for connecting loading plate and device adapting to eccentric loading of duct piece

Technical Field

The application relates to the technical field of underground tunnel engineering in rail transit construction, in particular to a chain connecting structure for connecting loading plates and an adaptive segment eccentric loading device.

Background

During construction and operation of the subway, the shield tunnel segment has a structure which can generate large convergence deformation under the influence of external factors such as peripheral unloading, ground stacking and the like, and further causes the problems of segment leakage water, cracking, concrete falling and the like.

In the existing foot size test for researching the reinforcing effect of the shield tunnel segment, the single-ring test and the symmetrical loading are mainly focused. In a single-ring test, the interaction force between the pipe sheet rings is often ignored, the influence of the transmission of axial force, bending moment and shearing force among the pipe sheets on the reinforced shield tunnel pipe sheet is not considered, the aspects of bolt strain, stress concentration, stress yield and the like among the rings cannot be researched, the difference between the actual working conditions is larger, and the influence on the reinforcing effect under two splicing modes of through joint splicing and staggered joint splicing cannot be researched. Under the actual working conditions of ground stacking and peripheral unloading, shield tunnel segments are often subjected to eccentric loads, so that a three-ring-foot size eccentric loading test is adopted. The upper loading plate and the lower loading plate in the existing test loading device and the hydraulic device are not connected at all, so that each loading plate needs a small hoist crane, the small hoist cranes can interfere with each other, the upper loading plate and the lower loading plate cannot be guaranteed to be on the same vertical surface, the defects of complex operation, incompleteness, inconvenience for experiment and the like exist, the loading test is greatly influenced, and the loading plates cannot be used as main test devices in a foot size experiment.

In summary, in the existing full-size test for researching the stress performance of the reinforced shield segment, the stress performance of the reinforced shield segment is more or less different from the actual situation, so that the test has certain limitations and is not flexible enough, and the problem needs to be solved by improving the technology urgently.

Disclosure of Invention

The purpose of the embodiment of the application is to provide a chain connecting structure for connecting a loading plate and an adaptive segment eccentric loading device, so as to solve the problem of mutual interference of small hoists in the related technology.

According to the first aspect of the embodiment of the application, a chain connection structure for connecting a loading plate is provided, the chain connection structure comprises a chain, two ends of the chain are respectively hinged with an adjusting stud, an external thread is arranged on the adjusting stud, a common nut and a safety nut are sequentially screwed into the external thread and are abutted against each other, and a disc spring assembly is further sleeved between the end portions of the chain.

Furthermore, the dish spring subassembly is formed by the superposition of a plurality of dish springs that the concave surface is upwards and a plurality of concave surface is downward dish spring.

Furthermore, adapter plates are fixedly connected to the left side and the right side of the loading plate.

Furthermore, the adapter plate is provided with a stud hole.

Furthermore, after the adjusting stud penetrates through the stud hole, two ends of the disc spring assembly are respectively abutted against the common nut and the adapter plate.

Further, the safety nut and the common nut have a stroke range capable of moving upwards by five centimeters on the adjusting stud.

Further, the chain is an LH1044 plate type chain.

According to a second aspect of the embodiments of the present application, there is provided a device for adapting to segment eccentric loading, comprising three loading plates, wherein two of the loading plates connected to each other are connected to each other through the chain connecting structure of the first aspect.

Furthermore, adapter plates are fixedly connected to the left side and the right side of the loading plate, stud holes are formed in the adapter plates, and after the adjusting studs penetrate through the stud holes, the two ends of the disc spring assembly are respectively abutted to the common nuts and the adapter plates.

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

according to the embodiment, in the connection structure, the left side and the right side of the loading plate are fixedly connected with the loading plate, stud holes are formed in the two sides of the loading plate, after the adjusting studs pass through the stud holes, the two ends of the disc spring assembly are respectively abutted against the common nut and the adapter plate, elastic deformation can be achieved through elastic expansion, the common nut is prevented from sliding, the design is flexible, and the safety is high. Further, the disc spring assembly is formed by overlapping a plurality of disc springs with upward concave surfaces and a plurality of disc springs with downward concave surfaces, and the safety nut and the common nut have a stroke range capable of moving upwards by five centimeters on the adjusting column so as to realize mutual dislocation between the loading plates.

In this application chain system, three load plates on the same perpendicular only need a big calabash to hang and both can hoist, compares that every load plate of traditional loading device all needs a little calabash to hang, and the little calabash of same angle is hung and can be interfered with each other, influences experimental accuracy, and original problem has been overcome to this chain system for device, makes every loading head normally load, reduces the quantity of rings, saves space, and the reliability is high.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic view illustrating a structure of a chain connecting structure for connecting load plates according to an exemplary embodiment.

Fig. 2 is a top view of a disc spring in a chain attachment structure for attaching a load plate according to an exemplary embodiment.

Fig. 3 is a front view of a disc spring concave side down in a chain attachment structure for attaching a load plate according to an exemplary embodiment.

Fig. 4 is a front view of a disc spring concave side up in a chain attachment structure for attaching a load plate according to an exemplary embodiment.

FIG. 5 is a schematic diagram illustrating an elevational configuration of an apparatus for accommodating off-center loading of a segment according to an exemplary embodiment.

FIG. 6 is a side view schematic diagram illustrating an apparatus for accommodating segment eccentric loading in accordance with an exemplary embodiment.

FIG. 7 is a schematic diagram illustrating a top view configuration of an apparatus for accommodating segment eccentric loading in accordance with an exemplary embodiment.

Description of reference numerals: the device comprises a loading plate 1, an adjusting stud 2, an adapter plate 3, a disc spring assembly 4, a chain 5, a safety nut 6, a common nut 7 and a stud hole 8.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

Fig. 1 is a schematic view illustrating a structure of a chain connecting structure for connecting load plates according to an exemplary embodiment. The embodiment provides a chain connection structure for connecting loading plate, chain connection structure includes chain 5, the both ends of chain 5 articulate respectively has an adjustment double-screw bolt 2, it has the external screw thread to open on the adjustment double-screw bolt 2, ordinary nut 7 and safety nut 6 screw in proper order the external screw thread, and both looks butt, ordinary nut 7 with it is equipped with dish spring subassembly 4 still to overlap between 5 tip of chain. The chain structure can solve the problem of mutual interference of the small hoist cranes, and can be connected with the loading plates, so that the upper loading plate and the lower loading plate are kept on the same vertical surface.

In the embodiment of the present application, the disc spring assembly 4 is formed by stacking a plurality of concave upward disc springs and a plurality of concave downward disc springs. The disc spring assembly 4 is of an arch-shaped structure, the disc spring assembly 4 is not deformed when the disc spring assembly is not loaded, and sixteen millimeters of elastic expansion and contraction can be achieved in the vertical direction through the deformation of the disc spring assembly 4 when the disc spring assembly is initially loaded.

In the embodiment of the application, adapter plates 3 are fixedly connected to the left side and the right side of the loading plate 1. The loading plates 1 can be linked by chains 5 and the loading of the shield tunnel segments by the loading plates 1 is prevented from being influenced.

In the embodiment of the present application, the adapter plate 3 has a stud hole 8. Each adjusting stud 2 is just smaller than the stud hole 7, so that the adjusting studs 2 can freely slide up and down during loading, and the shield tunnel segment deformation and slab staggering can be adapted.

In the embodiment of the present application, after the adjusting stud 2 passes through the stud hole 8, the two ends of the disc spring assembly 4 are respectively abutted against the common nut 7 and the adapter plate 3. A safety nut 6 is arranged on each adjusting stud 2, so that the sliding thread of a common nut can be prevented from falling off, and the normal operation of the test is ensured.

In the embodiment of the application, the safety nut 6 and the common nut 7 have a stroke range which can move upwards by five centimeters on the adjusting stud 2. So that the loading plates 1 can have a sufficient movable range, and the upper and lower loading plates 1 can be conveniently subjected to sufficient dislocation deformation.

In the embodiment of the present application, the chain 5 is a LH1044 plate type chain. The pin diameter is 5.94 mm, the pitch is 15.875 mm, the chain sheet height is 15 mm, the pin length is 22.78 mm, the chain sheet thickness is 2.42 mm, the weight per meter is 1.8 kg, the weight can be borne by 2.11 tons, and the chain 5 can rotate but cannot stretch and compress.

The embodiment also provides a device for adapting to eccentric loading of duct pieces, which comprises three loading plates 1, wherein the two connected loading plates 1 are connected through the chain connecting structure. A large hoist crane can hoist the loading plates 1 at the same angle, and the loading plates 1 are connected through chains 5. When not loading, can guarantee that loading plate 1 of same angle is on same perpendicular for the power that hydraulic means transmitted can be applyed the shield tunnel section of jurisdiction smoothly, makes the atress more even on the section of jurisdiction, and this device is more nimble, and the application is wide.

In the embodiment of the application, the equal fixedly connected with keysets 3 in the left and right sides of loading plate 1, the keysets 3 is last to have stud hole 8, adjustment double-screw bolt 2 passes behind stud hole 8, make dish spring subassembly 4's both ends respectively with ordinary nut 7 with keysets 3 looks butt. Not only is the chain system convenient to install, but also the dislocation range of the loading plate is convenient to limit through the position of the common nut.

The embodiment also provides a test method of the device for adapting to the eccentric loading of the duct piece, which comprises the following steps:

1) the method comprises the following steps: hoisting the loading plate 1 at the uppermost end by using a large hoist to enable the loading plate to be close to the hydraulic device;

2) step two: when the loading oil cylinder does not apply load, the disc spring 4 does not deform at the moment, and when the loading oil cylinder is initially loaded, the disc spring 4 elastically stretches in the vertical direction through deformation;

3) step three: continuing loading, when the loading plate 1 is supported by the friction force between the loading plate 1 and the segment, moving the common nut 6 and the safety nut 7 upwards to ensure that the loading plate has a sufficient moving range;

4) step four: loading until the shield tunnel segment is damaged, wherein the three loading plates are arranged on the same vertical plane, so that the load applied by the hydraulic device is reduced;

5) step five: and (4) completing the test, recovering the positions of the common nut 6, the hoist crane and the loading plate 1 according to the design requirement, checking and accepting under relevant regulations, and finally taking out the shield segment.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (9)

1. The utility model provides a chain connection structure for connecting loading plate, its characterized in that, chain connection structure includes chain, ordinary nut and safety nut, the both ends of chain articulate respectively has an adjustment double-screw bolt, it has the external screw thread to open on the adjustment double-screw bolt, ordinary nut and safety nut screw in proper order the external screw thread, and both looks butt, ordinary nut with still the cover is equipped with dish spring subassembly between the chain tip.

2. The chain connecting structure as claimed in claim 1, wherein the disc spring assembly is formed by stacking a plurality of disc springs with concave surfaces facing upward and a plurality of disc springs with concave surfaces facing downward.

3. The chain connecting structure according to claim 1, wherein adapter plates are fixedly connected to both left and right sides of the load plate.

4. The chain connecting structure as claimed in claim 3, wherein the adapter plate has a stud hole formed therein.

5. The chain connecting structure as claimed in claim 4, wherein the adjusting stud is inserted into the stud hole to allow the two ends of the disc spring assembly to abut against the common nut and the adapter plate, respectively.

6. The chain connecting structure as claimed in claim 1, wherein the safety nut and the common nut have a stroke range movable upward by five centimeters on the adjusting stud.

7. The chain connecting structure as claimed in claim 1, wherein the chain is a LH1044 plate type chain.

8. A segment-adaptive eccentric loading device, comprising three loading plates, wherein two of the loading plates connected are connected by the chain connecting structure according to any one of claims 1 to 7.

9. The segment-adaptive eccentric loading device according to claim 8, wherein adapter plates are fixedly connected to the left and right sides of the loading plate, stud holes are formed in the adapter plates, and after the adjusting studs penetrate through the stud holes, the two ends of the disc spring assembly are respectively abutted to the common nuts and the adapter plates.

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