CN216922141U - Embedded sleeve capable of being used repeatedly - Google Patents

Abstract

The utility model discloses a reusable embedded sleeve, which comprises a sleeve head, wherein a screw rod integrally extends out of the sleeve head, an internal thread hole is formed in the center of the end face, away from the sleeve head, of the screw rod, the internal thread hole is divided into a first thread connecting area and a second thread connecting area according to the length, and when the internal thread of the first thread connecting area slides, the internal thread of the second thread connecting area can be connected and fixed with the external thread. Owing to be equipped with second threaded connection region, after the internal thread smooth silk in first threaded connection region, can use the internal thread in second threaded connection region to be connected fixedly with the external screw thread, need not go to dig out pre-buried sleeve to it is more convenient to make the maintenance get up.

Description

Embedded sleeve capable of being used repeatedly

Technical Field

The utility model relates to the technical field of rail transit, in particular to a reusable embedded sleeve.

Background

Along with the rapid development of social economy, more and more cities begin to build subway tunnels, the construction of urban subway shield tunnel construction engineering is generally supported by a duct piece structure, the duct piece is generally formed by pouring concrete, and an embedded sleeve is arranged when the concrete is poured, so that the rear anchoring workload on the section tunnel lining duct piece during later-stage equipment installation is reduced, the construction efficiency is improved, and the operating environment in the tunnel is improved. The existing embedded sleeve is internally provided with a section of internal thread on the top end surface and used for being connected and fixed with an external bolt, in the practical application process, due to the vibration of a rail and other reasons, the situation that the thread slipping occurs in the meshing thread section is long, and because the embedded sleeve is an embedded sleeve, if the embedded sleeve deeply embedded in concrete is repaired, the embedded sleeve is dug out, a new sleeve is put in again, and then the concrete is injected into the embedded sleeve to fix the embedded sleeve.

Disclosure of Invention

Aiming at the defects existing in the prior art, the technical problems to be solved by the utility model are as follows: the utility model provides a can change convenient and can repetitious usage's embedded sleeve.

In order to solve the technical problems, the utility model is realized by the following technical measures: the utility model provides a pre-buried sleeve that can repetitious usage, includes the cover barrel head, cover barrel head integral type extends the screw rod, and wherein, the center department that the terminal surface of cover barrel head was kept away from to the screw rod is equipped with the internal thread hole, the internal thread hole divide into first threaded connection region and second threaded connection region according to length, and in the use, after the internal thread smooth silk in first threaded connection region, can use the internal thread in second threaded connection region to be connected fixedly with the external screw thread.

Compared with the prior art, the utility model has the advantages that: the depth of the internal thread of the traditional embedded sleeve is equivalent to that of the first threaded connection area, so that the threads at the threaded engagement part can slide under the influence of factors such as track resonance and the like in the actual use process. According to the embedded sleeve, the second threaded connection area is further arranged, so that after the internal threads of the first threaded connection area are screwed, the internal threads of the second threaded connection area can be connected and fixed with the external threads, the embedded sleeve does not need to be dug out, and the embedded sleeve is convenient to maintain.

As a refinement of the utility model, the nominal diameter of the first threaded connection region is of the same size as the nominal diameter of the second threaded connection region. The purpose of selecting the design is as follows: the nominal diameter of the first threaded connection area is equal to the nominal diameter of the second threaded connection area in size, a deep hole is drilled in the end face of the embedded sleeve, and then a longer internal thread is machined in the hole.

As a development of the utility model, the nominal diameter of the first threaded connection region is greater than the nominal diameter of the second threaded connection region. The purpose of selecting the design is as follows: the nominal diameter of the first threaded connection area is larger than that of the second threaded connection area, and the structure is characterized in that counter bores are machined firstly, and then internal threads with common lengths are machined in the two counter bores respectively.

As a refinement of the utility model, the nominal diameter of the first threaded connection region is one step greater than the nominal diameter of the second threaded connection region. The purpose of selecting the design is as follows: the nominal diameter of the second threaded connection region is as large as possible, which allows the area of the threaded engagement to be larger, making the threaded connection more secure.

As an improvement of the utility model, the screw rod material is stainless steel or alloy steel treated by special anti-corrosion technology. The purpose of selecting the design is as follows: because the embedded sleeve is embedded in concrete, the embedded sleeve is not convenient to replace, and the material is made of anticorrosive materials such as stainless steel, so that the whole embedded sleeve is prevented from being corroded after a long time.

As an improvement of the utility model, the screw is cylindrical in shape: the cylindrical screw achieves the purpose of saving cost compared with the cylindrical screw with square or other shapes under the condition of ensuring the strength.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic view of a straight-through type pre-buried sleeve according to the present invention.

Fig. 2 is a schematic view of a counter bore type embedded sleeve according to the present invention.

Fig. 3 is a using state diagram of the embedded sleeve.

Description of reference numerals: 1. a sleeve head; 2. a screw; 3. a first threaded connection region; 4. a second threaded connection region; 5. and (3) concrete.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

Example 1

Referring to fig. 1 and fig. 3, the pre-embedded sleeve capable of being used repeatedly provided by this embodiment is composed of a sleeve head 1 and a screw rod 2.

The sleeve head 1 is in an outer hexagonal shape and made of 314 stainless steel, the sleeve head 1 integrally extends out of a cylindrical screw rod 2, an internal thread through hole is formed in the center of the end face, away from the sleeve head 1, of the screw rod 2, the nominal diameter of the internal thread hole is M12, the depth of the internal thread is 70mm, the internal thread hole is of a through type, and namely the nominal diameter of the first threaded connection region 3 is the same as the nominal diameter of the second threaded connection region 4 in size. The screw is formed by machining a straight hole with the diameter of 11.2 x 80mm in the end face of the screw 2 and then machining an internal thread with the diameter of M12 x 70 mm.

When normally working, the external screw thread is about 30mm with the internal screw thread meshing effective distance, when long-time the use, if behind the internal thread smooth silk of first threaded connection region 3, can choose for use the bolt of M12 who has extension screw 2, be connected fixedly with the internal thread of second threaded connection region 4 to reach the mesh that need not change pre-buried sleeve.

Example 2

Referring to fig. 2 and fig. 3, the pre-embedded sleeve capable of being used repeatedly provided by the present embodiment is composed of a sleeve head 1 and a screw rod 2.

The sleeve head 1 is outer hexagonal shape, and the material is 314 stainless steel, and the cylindrical screw rod 2 is extended to sleeve head 1 integral type, wherein, the center department that the terminal surface of sleeve head 1 was kept away from to screw rod 2 is equipped with the internal thread counter bore, and the nominal diameter of the screw hole in the first threaded connection region 3 is M12, and the internal thread degree of depth is 35mm, and the nominal diameter of the screw hole in the second threaded connection region 4 is M10, and the internal thread degree of depth is 30mm, and the internal thread hole is counter bore formula, and the nominal diameter of first threaded connection region 3 is greater than the nominal diameter of second threaded connection region 4 promptly. The method is characterized in that a hole with the diameter of 11.2 x 36mm is machined in the end face of the screw rod 2, then a counter bore with the diameter of M9.2 x 35mm is machined in the bottom face of the hole, finally an internal thread with the diameter of M12 x 35mm is machined in the hole of the first threaded connection region 3, and an internal thread with the diameter of M10 x 30mm is machined in the counter bore of the second threaded connection region 4.

Normal during operation, the external screw thread is controlled at 30mm with the internal screw thread meshing effective distance, when long-time the use, if behind the internal thread smooth silk of the regional 3 of first threaded connection, can choose for use the bolt of M10 who has the extension external screw thread, be connected fixedly with the internal thread of the regional 4 of second threaded connection, reach the mesh that need not change pre-buried sleeve.

The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the scope of the utility model as defined by the independent claims are intended to be embraced therein.

Claims (6)

1. The utility model provides a pre-buried sleeve of ability repetitious usage, includes cartridge head (1), screw rod (2), characterized by are extended to cartridge head (1) integral type: the center department that the terminal surface of cover barrel head (1) was kept away from in screw rod (2) is equipped with the internal thread hole, the internal thread hole divide into first threaded connection region (3) and second threaded connection region (4) according to length, and in the use, after the internal thread smooth silk in first threaded connection region (3), can use the internal thread in second threaded connection region (4) to be connected fixedly with the external screw thread.

2. A reusable pre-embedded sleeve as claimed in claim 1, wherein: the nominal diameter of the first threaded connection region (3) is equal to the nominal diameter of the second threaded connection region (4).

3. A reusable pre-embedded sleeve as claimed in claim 1, wherein: the nominal diameter of the first threaded connection region (3) is greater than the nominal diameter of the second threaded connection region (4).

4. A reusable pre-embedded sleeve as claimed in claim 1, wherein: the nominal diameter of the first threaded connection region (3) is one step greater than the nominal diameter of the second threaded connection region (4).

5. A reusable pre-embedded sleeve as claimed in claim 1, wherein: the screw rod (2) is made of stainless steel or alloy steel treated by an anti-corrosion technology.

6. A reusable pre-embedded sleeve as claimed in claim 1, wherein: the shape of the screw rod (2) is cylindrical.

Images