CN212152956U - Embedded sleeve positioning base and embedded sleeve assembly - Google Patents

Abstract

A pre-buried sleeve positioning base and a pre-buried sleeve assembly are provided, wherein the positioning base is of a hollow cylinder structure with an open top end and comprises a base plate and a side wall, and a reinforcing gasket is arranged on the inner side surface of the base plate; a preformed hole is formed in the central position, and dismounting grooves are formed in the periphery of the base plate at the bottom of the side wall at intervals; the upper portion of lateral wall is the screw thread section, and the bottom is smooth section, wherein be equipped with the external screw thread with pre-buried sleeve pipe adaptation on the screw thread section. The positioning base is matched with the sleeve and the bottom die to form an embedded sleeve assembly. The sleeve is sleeved on the positioning base, and the thread section and the smooth section of the sleeve are matched; the mounting hole on the bottom die is fixedly connected with the preformed hole of the positioning base through a rivet; a sealing ring is arranged between the positioning base and the sleeve, and the sealing ring is arranged in a positioning groove in the outer side of the bottom end of the positioning base. The utility model has simple structure, good positioning effect, and large connecting and anchoring strength between the positioning base and the pre-buried sleeve; the sealing effect is good, and cement paste is prevented from entering a casing gap; the disassembly mode is flexible; can be repeatedly used.

Description

Embedded sleeve positioning base and embedded sleeve assembly

Technical Field

The utility model relates to a buried sleeve location base and buried sleeve subassembly in advance is applicable to high-speed railway track construction technical field.

Background

In the development process of a high-speed railway, the positioning accuracy of a railway fastener system is always an important factor for restricting the running speed of a railway train and the stability and comfort of the railway fastener system, and the railway fastener system is connected with a turnout through a turnout sleeper embedded sleeve, so that the positioning of the turnout sleeper embedded sleeve is a key factor for influencing the quality of the high-speed railway.

At present, the positioning modes of the embedded sleeve of the high-speed switch tie are mainly two: one mode is bolt positioning, a sleeve is fixed on a bottom die through a through hole of a die chassis, the tightness of the sleeve is guaranteed in the fixing mode, but the die is required to be overturned for installation and disassembly, and the sleeve is mainly used for a short die of a production line; the other mode is that the positioning base and the bottom template are tensioned by rivets through the positioning base, and the switch tie cuts off the connection between the rivets and the bottom template by means of the tension releasing force of the steel wires when the prestressed steel wires are released. The location base that uses in the past is mostly a straight section of thick bamboo, and the base blind end only has a haplopore as connecting and demolish sharing hole, and base and casing clearance get into grout easily and make the location base difficult to dismantle, and the base wall is thin, just damages during the dismantlement, unable reutilization. By changing the shape of the positioning base, the force transmission mechanism between the positioning base and the sleeve can be changed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a buried sleeve location base and buried sleeve subassembly promote the anchoring ability between location base and the closed sleeve, make its convenient to detach to make its reuse through changing location base overall dimension.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

the utility model provides an embedded sleeve pipe positioning base which characterized in that: the hollow cylinder structure with an opening at the top end comprises a base plate and a side wall, wherein a reinforcing gasket is arranged in the base plate, a reserved hole is formed in the center of the base plate, and dismounting grooves are formed in the periphery of the base plate at the bottom of the side wall at intervals; the upper portion of lateral wall is the screw thread section, and the bottom is smooth section, wherein be equipped with the external screw thread with pre-buried sleeve pipe adaptation on the screw thread section.

Wherein, as the utility model discloses an optimal technical scheme, chassis and lateral wall be integrative shaping structure, for the fine reinforcing polyamide 66 of glass or nylon material or can satisfy operation requirement's other materials.

The reinforcing gasket is a steel, copper, iron or alloy sheet, and the thickness of the reinforcing gasket is smaller than that of the base; the size is adapted to the inner diameter size of the hollow cylindrical structure.

Preferably, still include the sealing washer, the sealing washer is located in the constant head tank of location base bottom outside.

Preferably, the positioning base is also designed to be reduced in diameter from bottom to top, so that the positioning base is convenient to disassemble.

The utility model also provides a pre-buried sleeve assembly, which comprises a positioning base, a sleeve and a bottom die, wherein the positioning base is the pre-buried sleeve positioning base, the sleeve is sleeved on the positioning base, and the thread section and the smooth section of the sleeve are respectively in adaptive connection; the bottom die is arranged at the bottom and provided with a plurality of mounting holes, and the preformed hole of the positioning base is fixedly connected with the mounting holes through rivets; the bottom of the sleeve abuts against the upper surface of the bottom die.

Compared with the prior art, the utility model has the following beneficial effect and advantage:

1. good positioning effect. Increase the height of location base, simultaneously according to sheathed tube internal dimension, the external screw thread size of base is fixed a position to the base top of founding, design location base becomes by smooth outer wall of part and partial spiral outer wall combination base of original single straight wall hollow cylinder base, location base and sleeve pipe pass through threaded connection, effectively strengthen location base and buried sheathed tube connection anchor dynamics, with buried sleeve pipe and more firm fixed together of die block, when the switch tie steel wire is put and is opened, prestressing force effect makes the location base receive the shearing force, the rivet is cut and sleeve pipe and location base off normal position.

2. The good sealed effect prevents that grout from getting into the casing clearance. Through increase the round sealing washer in location base bottom for paste the zero clearance more between sleeve pipe and the location base, can effectively block cement paste inflow in the pouring of prestressed concrete switch pillow vibration process, guarantee that the sleeve pipe is not crooked and warp because of the grout entering when the pre-buried sleeve pipe is firmly fixed a position.

3. Flexible disassembly mode. The convenient to detach is dwindled gradually to location base diameter from bottom to top, and the embedded reinforcing backing plate that strengthens has increased the thickness on location base chassis simultaneously on the location base, establishes the dismouting groove in the base outer wall of thickening, and the later stage is dismantled the spanner rotation through the base of matching the design and is twisted out, and is light convenient.

4. Economy of repeated use. The positioning base is upgraded in material, and convenient and nondestructive design is disassembled, so that the positioning base can be repeatedly utilized, the cost is reduced, and the positioning base is economical and practical.

Drawings

Fig. 1 is a schematic view of the overall structure of the positioning base according to the present invention;

fig. 2 is a schematic view of an internal structure of the positioning base according to the present invention;

fig. 3 is a schematic bottom structure view of the positioning base according to the present invention;

fig. 4 is a schematic view of the overall structure of the embedded bushing assembly according to the present invention;

reference numerals: 1-positioning base, 1.1-base plate, 1.2-side wall, 1.21-thread section, 1.22-smooth section, 1.3-dismounting groove, 1.4-preformed hole, 1.5-reinforcing gasket, 1.6-sealing ring, 1.7-sealing groove, 2-embedded sleeve, 3-bottom die and 3.1-mounting hole.

Detailed Description

The positioning base is suitable for prestressed concrete members molded by adopting a 'pretensioning process' and is used when embedded sleeves are needed. As described in the patent application No. 200920277534.3, the "pretensioning process" is a method of molding a prestressed concrete structure, and refers to a construction method of tensioning a steel material on a stand and then pouring concrete to form a prestressed concrete structure. The process comprises the steps of tensioning the steel bar with a preset tensioning force and fixing the two ends of the steel bar on a pedestal or a steel die by using a clamp; erecting a formwork and pouring concrete; after the concrete element has reached a predetermined strength, the prestressed reinforcement is released so that the reinforcement contracts (i.e., is called slackening) to cause prestressing in the concrete element.

The term "counter-form" as used herein includes any suitable part of a mould for moulding a concrete element and is not limited to those moulds which are arranged at the bottom of the concrete.

Hereinafter, preferred embodiments of the present invention will be described in detail. Those skilled in the art will appreciate that the following detailed description illustrates the invention by way of example only and not by way of limitation.

The technical solution of the present invention will now be described with particular reference to the accompanying drawings.

As shown in fig. 1-3, the utility model provides a pre-buried sleeve positioning base, for hollow cylinder, the cross-sectional diameter is 31mm, one end is closed one end opening, including chassis 1.1 and lateral wall 1.2, lateral wall 1.2 open end outer wall has protruding screw thread rib, and height 21mm is called screw thread section 1.21, and protruding screw thread rib height wherein is 2.5mm the same with sleeve internal thread size, and the width is 2.5mm, and the closed end outer wall is smooth cylinder straight section, and height is 39mm, is called smooth section 1.22; the outer wall of the base with the thread section 1.21 changes the area between the sleeve and the positioning base from tight adhesion to occlusion, thereby increasing the anchoring capability of the positioning base and ensuring that the sleeve is not easy to deviate or sink; meanwhile, the height of the positioning base is increased, and the anchoring length between the sleeve and the positioning base is also increased.

In addition, 1.3 but not limited to 3 dismounting grooves are reserved at the bottom of the chassis 1.1 at the closed end of the positioning base, the diameter of each hole is 3-4 mm, the distance between the holes is 21.88mm, and the depth of each hole is 8-10 mm;

a reinforcing gasket 1.5 is arranged on the inner side of a chassis 1.1 at the closed end of the positioning base, and the reinforcing gasket is molded with the positioning base after being pre-embedded during manufacturing; the anti-torsional damage of the base during disassembly is enhanced, the plurality of reserved notches are designed to provide interfaces for disassembly, the gasket is annular, the outer diameter is smaller than 20.5mm, the inner diameter is larger than 5mm, the thickness is 1-2mm, and the function of enhancing the anti-torsional capacity of the positioning base is achieved.

The bottom of the positioning base 1 is provided with a sealing groove 1.7, the height of the sealing end of the base is 0.5mm, the groove depth is 0.5mm, the groove width is 1.5mm, a sealing ring is arranged in the sealing groove 1.6, the sealing ring 1.6 can be made of high-temperature-resistant grease-resistant sealing ring materials such as ACM (Acrylonitrile butadiene styrene) acrylate rubber, the thickness is 0.5mm, and cement paste is effectively prevented from entering a gap between the base and a sleeve in the process of pouring the switch sleeper concrete.

The positioning base is made of glass fiber reinforced polyamide 66, or is made of nylon or other materials meeting the requirements after inspection. The raised thread rib and the positioning base are integrated and are formed in one step. The reinforcing gasket 1.5 of the positioning base can be made of steel, copper, iron, alloy and other metals, and the thickness of the reinforcing gasket is 2-3 mm smaller than that of the base. The total length range of the positioning base is 47-128 mm, the thickness range of the base plate 1.1 is 3-5 mm, and the thickness range of the side wall 1.2 is 4-6 mm.

The chassis 1.1 adopts the form of thickening the wall, has increased the durable degree of location base, reaches the multiple use function. The section of the positioning base is circular, and the diameter of the outer wall and the size of the external thread of the positioning base are matched with the inner size of the embedded sleeve.

The disassembly and assembly groove opening of the chassis 1.1 of the positioning base is matched with the quantity and the size of the protruding rivets of the disassembly wrench of the concrete member positioning base. The base disassembly wrench comprises a wrench end and a handle, a plurality of protruding rivets are designed at the end part, and the long handle is used for reducing the disassembly torque force for the lever principle and is convenient for manual operation.

Fig. 4 is a schematic view showing the overall structure of the embedded casing assembly according to the present invention. The utility model discloses do not restrict the shape and the structure of concrete member and die block. Wherein the concrete elements, not shown, are moulded in a pre-tensioning process. The positioning mechanism comprises an embedded sleeve 2, a positioning base 1 and a bottom die 3. As shown in the figure, the positioning base 1 is placed on a position of the bottom mold 3. The rivet is passed through the prepared hole 1.4 of the positioning base 1 and the mounting hole 3.1 of the bottom die 3 in this order from above, and is pulled tight from below to fix the positioning base 1 to the bottom die 3. The embedded sleeve 2 is sleeved on the positioning base 1 through interference fit. The rivets are sheared by shear forces generated when the concrete member is placed in tension. The sleeve and the positioning base 1 are suitably connected by means of an internal screw or other connection mechanism of the pre-buried sleeve 2 and a corresponding external screw of the positioning base 1. When in use, the positioning base 1 can be fixed only by inserting the rivet-like rod-shaped part into the mounting hole 3.1 in the bottom die 3 and then tensioning the rivet-like rod-shaped part from the other side. Furthermore, instead of rivets and holes in the bottom mould, other breakable connecting structures can be provided, such as adhesive connections, as long as the connecting structures can be sheared off when the concrete element is put under tension.

As shown in fig. 4, when the embedded bushing assembly is assembled, the concrete member is, for example (but not limited to) a concrete switch tie or other concrete members requiring embedded bushings. The embedment sleeve is not limited to a particular sleeve type, but is intended to include any embedment with internal spirals suitable for embedment in a concrete member.

There is a step described in the patent application No. 200920277534.3 of selecting a suitable rivet or other connecting element having the same function as the rivet, and a step of forming a hole in the counter die matching the rivet.

And then, connecting the rivet with the positioning base 1 and fixing the rivet on the bottom die 3. The rivet is connected with the positioning base 1, and the rivet can penetrate through a reserved hole at the closed end of the positioning base. It is conceivable that the order of the rivet connection to the setting base 1 and the rivet connection through the mounting hole 3.1 in the counter die 3 can be either that the rivet is connected first to the setting base and secondly through the mounting hole 3.1, or that the rivet is connected firstly through the mounting hole 3.1 and secondly to the setting base 1. In the preparation process of the positioning base, the rivet can be integrally processed with the positioning base, and during installation, a rivet rod in the integrated component only needs to penetrate through the installation hole 3.1 in the bottom die 3.

Next, the rivet is fastened so that the positioning base 1 is fixed in position on the bottom die 3. The method of fastening the rivet may employ any suitable method known to those skilled in the art. Preferably, the rivet is tensioned with a matched riveter. The riveter nozzle is adapted to locate the base height and may be a power or manual or other form of riveter. The skilled person will understand that the positioning element should be fixed in place on the side of the bottom mould facing the concrete element to be moulded.

The embedment sleeve 2 can then be mounted on the positioning base 1 in any suitable manner. The attachment means may be any means known to those skilled in the art and include, for example and without limitation, a threaded screw-on, an interference fit connection, a key-and-slot fit connection, and any other suitable connection means known in the art depending on the manner in which the sleeve and the locating member are mated.

And then, prestressed reinforcement tensioning, concrete pouring and precast member curing processes are performed, and then, when the concrete member reaches a predetermined strength, the tensioned and fixed reinforcement is released to be contracted, and the contraction force of the at least one reinforcement acts on the rivet to cause the rivet to be sheared.

The concrete member is then demolded. Demoulding can be realized by hoisting but not limited to hoisting.

And finally, dismantling the positioning base of the prestressed concrete member. And the corresponding positioning base disassembling wrench is used, and the positioning base is screwed out in a rotating mode after the reserved protruding rivet matched with the positioning base disassembling groove is inserted into the corresponding disassembling groove of the positioning base. The number and the size of the protruding rivets reserved on the positioning base disassembling wrench are not limited to the figures, and the protruding rivets are matched with the positioning base. In addition, the overall dimension of the disassembly wrench for the positioning base is not limited to the shape shown in the figure, the end of the wrench can be in a triangular shape, a circular shape, a square shape and other suitable shapes, the handle is not limited to the shape shown in the figure, the length of the handle is enough to easily unscrew the base, and the disassembly wrench is convenient to hold by hands.

The practice of the method, mechanism and apparatus of the present invention has been described in detail above. It will be understood that the above description is intended to illustrate the invention and is not intended to limit the scope and spirit of the invention. Variations, permutations and equivalents may be made to the features of the various embodiments of the invention without departing from the invention. The invention is defined by the appended claims.

Claims (6)

1. The utility model provides an embedded sleeve pipe positioning base which characterized in that: the hollow cylinder structure with an open top end comprises a base plate (1.1) and a side wall (1.2), wherein a reinforcing gasket (1.5) is arranged in the base plate (1.1); a preformed hole (1.4) is formed in the center of the base plate (1.1), and dismounting grooves (1.3) are formed in the periphery of the base plate (1.1) at intervals at the bottom of the side wall (1.2); the upper portion of lateral wall (1.2) is screw thread section (1.21), and the bottom is smooth section (1.22), wherein be equipped with the external screw thread with buried sleeve (2) adaptation on screw thread section (1.21).

2. The pre-buried sleeve positioning base of claim 1, characterized in that: the chassis (1.1) and the side wall (1.2) are of an integrated structure and made of glass fiber reinforced polyamide 66 or nylon.

3. The pre-buried sleeve positioning base of claim 1, characterized in that: the reinforcing gasket (1.5) is a steel, copper, iron or alloy sheet, and the thickness of the reinforcing gasket is smaller than that of the base; the size is adapted to the inner diameter size of the hollow cylindrical structure.

4. The pre-buried sleeve positioning base of claim 1, characterized in that: still include sealing washer (1.6), sealing washer (1.6) are located in constant head tank (1.7) outside location base (1) bottom.

5. The pre-buried sleeve positioning base of claim 1, characterized in that: the hollow cylinder structure is subjected to reducing design from bottom to top.

6. An embedded sleeve assembly is characterized in that: the embedded sleeve positioning device comprises a positioning base (1), a sleeve (2) and a bottom die (3), wherein the positioning base (1) is the embedded sleeve positioning base according to any one of claims 1-5, the sleeve (2) is sleeved on the positioning base (1), and a threaded section and a smooth section of the sleeve (2) are respectively in adaptive connection; the bottom die (3) is arranged at the bottom and provided with a plurality of mounting holes (3.1), and the preformed holes (1.4) of the positioning base (1) are fixedly connected with the mounting holes (3.1) correspondingly through rivets; the bottom of the sleeve (2) is abutted against the upper surface of the bottom die (3).

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