Pile casing connecting device and pile casing

Abstract

The utility model relates to the field of rotary excavating machinery, in particular to a pile casing connecting device and a pile casing, and solves the problem that a pile casing screw is difficult to mount and dismount due to unstable connection in the prior art. Comprising a taper sleeve, a fixing ring and a cone, the taper sleeve is provided with a first through hole, the taper body is provided with at least one pin, the fixing ring is provided with a second through hole, a straight groove matched with the pin is formed in the axial direction of the second through hole, and a groove communicated with the straight groove is formed in the radial direction of the second through hole. When the first through hole is aligned with the second through hole, the pin of the cone is inserted into the straight groove, the cone is rotated to enable the pin to be screwed into the groove, and locking connection of the cone sleeve, the fixing ring and the cone is achieved. The threaded connection mode of a traditional pile casing screw is omitted, the bearing capacity of the connecting device is high, the screw-in design of the taper sleeve and the cone enables the pile casing to be installed and detached more easily and quickly, and installation time and labor intensity are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of rotary digging machinery, especially to a casing connection device and casing. BACKGROUND

[0002] In the construction, especially in the pile foundation construction process, the use of casing is very common. The main role of the casing is to protect the drilling and prevent the hole wall from collapsing, ensuring the stability of the pile foundation and the safety of the construction. The full casing screw is a key component for connecting and fixing the full casing, and its quality and performance directly affect the smooth progress of the construction and the safety of the project. The full casing screw is mainly divided into German standard screws and Japanese standard screws. Due to the different screw processing levels of each manufacturer, there are deficiencies in production equipment, process control and quality detection, resulting in low size precision, rough thread and insufficient strength of the produced screws. These problems directly lead to the difficulty of disassembling the screws during use, and construction personnel often need to spend more time and effort to handle it, which not only increases the construction cost, but also may cause the construction progress to be delayed. More seriously, if the screw is damaged during disassembly, it may cause the concrete to solidify, thereby burying the pipe, causing greater economic loss and safety hazards.

[0003] In order to solve the above problems, the prior art proposes a full-rotation rigid casing connection device (patent publication number CN207193970U) including a male connector, a female connector and a bolt. The male connector is connected to the upper end of the lower steel casing through welding, and the female connector is connected to the lower end of the upper steel casing through welding. The inner diameter of the female connector is larger than the outer diameter of the male connector, and female connector thread holes and male connector thread holes are respectively provided on the female connector and the male connector. The bolt is divided into a nut and a threaded portion, and the threaded portion is connected through the female connector thread hole and the male connector thread hole. The design of the male connector and the female connector of the above-mentioned scheme makes the installation and disassembly more convenient and easy to maintain, but the male connector and the female connector need to be connected to the upper and lower steel casings through welding, which requires precise welding technology and high-quality welding materials to ensure the firmness and durability of the connection. In addition, the threaded portion of the bolt needs to be precisely matched with the thread holes on the male connector and the female connector, which limits the installation speed, and regular maintenance is required if the thread is worn or corroded.

[0004] Therefore, how to provide a casing connection device that is stable in connection and easy to disassemble is a technical problem that needs to be solved in the field. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a casing connection device and casing.

[0006] A casing connection device, comprising a taper sleeve, a fixing ring and a taper body; the taper sleeve is provided with a first through hole,

[0007] The taper is provided with at least one pin, the fixing ring is provided with a second through hole, and is provided with a straight slot matched with the pin in the axial direction of the second through hole and a groove communicated with the straight slot in the radial direction of the second through hole;

[0008] When the first through hole and the second through hole are aligned, the pin of the taper is inserted into the straight slot and the taper is rotated so that the pin is screwed into the groove, thereby achieving the locking connection of the taper sleeve, the fixing ring and the taper.

[0009] As an improved scheme, the taper comprises a cylindrical segment and a conical segment, and the pin is arranged on the cylindrical segment.

[0010] As an improved scheme, the first through hole is a tapered hole matched with the conical segment, and the second through hole is a cylindrical hole matched with the cylindrical segment.

[0011] As an improved scheme, the pin is two pins symmetrically distributed along the diameter of the cylindrical segment.

[0012] As an improved scheme, a limiting column is further arranged to block the movement of the pin in the groove after the rotation of the taper.

[0013] As an improved scheme, the limiting column is a pin or a bolt penetrating through the groove.

[0014] The utility model discloses still provide a kind of protector, using the protector connecting device described above.

[0015] Beneficial effects:

[0016] The utility model cancels the thread connection mode of traditional protector screw, when using, respectively weld taper sleeve and fixing ring on the upper and lower protector to be connected, pass through the pin of taper and be screwed into the recess in fixing ring, so design makes connection more stable, not easy to be influenced by torque and vibration, reduce the damage and replacement frequency of bolt, to prolong the service life of protector. The utility model can better disperse and bear the force generated when protector rotates, improve the carrying capacity of connecting device. And the screw-in design of taper sleeve and taper makes the process of protector installation and disassembly more simple and fast, reduces installation time and labor intensity. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following briefly introduces the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structure shown in the drawings without creative labor. In the drawings, the same parts are marked with the same reference numerals. The drawings are not drawn according to the actual proportion.

[0018] Figure 1 The utility model discloses a pile connecting device structure schematic view;

[0019] Figure 2 The utility model discloses a working schematic view;

[0020] Figure 3 The utility model discloses a fixed ring structure schematic view. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0022] It should be noted that when an element is referred to as being "fixedly connected" or "arranged" on another element, it can be directly on the other element or can have a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or can have a middle element.

[0023] It should also be noted that if the embodiments of the utility model involve directional indications, such as up, down, left, right, front, back, etc., the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly. In addition, if the embodiments of the utility model involve descriptions such as "first", "second", etc., such descriptions are only for description purposes and cannot be understood as indicating or implying the relative importance or the number of the indicated technical features or indicating the execution order of the method, etc. Those skilled in the art can understand that any change within the technical concept of the utility model without deviating from the utility model points should be included in the protection scope of the utility model.

[0024] Embodiment 1

[0025] Reference Figures 1-3 A pile connecting device includes a cone sleeve 1, a fixed ring 2 and a cone 3. The cone sleeve 1 is provided with a first through hole 11, and the cone 3 is provided with at least one pin 31, and the preferred embodiment is two, which are symmetrically distributed along the diameter of the cylindrical segment. The fixed ring 2 is provided with a second through hole 21, and is provided with a straight groove 22 matched with the pin 31 in the axial direction of the second through hole 21, and is provided with a groove 23 communicated with the straight groove 22 in the radial direction of the second through hole 11. When the first through hole 11 and the second through hole 21 are aligned, reference Figure 2The pin 31 of the cone 3 is inserted into the straight slot 22, and then the cone 3 is rotated to make the pin 31 screw into the groove 23, so that the locking connection of the cone sleeve 1, the fixing ring 2 and the cone 3 is realized.

[0026] The utility model discloses cancel the thread connection mode of traditional protection cylinder screw, when using, respectively with the fixed ring of cone sleeve and weld in the upper and lower protection cylinder of connecting, through the pin of cone on the fixed ring recessed groove of screwing into, such design makes the connection more stable, is not easy to be influenced by torque and vibration, reduces the damage and replacement frequency of bolt, thereby prolongs the service life of protection cylinder. The utility model discloses can better disperse and bear the force of protection cylinder rotation, improves the carrying capacity of connecting device. And the screwing design of cone sleeve and cone makes the protection cylinder installation and dismounting process more simple and fast, reduces construction time and labor intensity.

[0027] In one preferred embodiment, with reference to Figure 1 The cone 3 comprises a cylindrical section 32 and a conical section 33, and the pin 31 is arranged in the cylindrical section. The first through hole 11 is a tapered hole matched with the conical section 33 of the cone 3, and the second through hole 21 is a cylindrical hole matched with the cylindrical section 32 of the cone 3.

[0028] In this embodiment, the conical section 33 cooperates with the tapered hole of the first through hole 11, having the effect of automatic centering. During installation, even if there is a certain initial deviation, the tapered structure can guide the automatic adjustment of the cone 3, so that the cone 3 is accurately connected with the tapered sleeve 1, improving the installation efficiency and precision, and reducing the problems caused by installation errors. The cylindrical section 32 cooperates with the cylindrical hole of the second through hole 21, which can ensure the axial stability and coaxiality of the cone 3 after installation, so that the cone 3 can maintain good cooperation with components such as the fixing ring 2 during rotation and other operations, avoiding shaking or misalignment, and ensuring the overall stability and reliability of the casing connection device. The cooperation of the conical section 33 and the tapered hole, as well as the cooperation of the cylindrical section 32 and the cylindrical hole, can significantly increase the contact area between the cone 3 and the tapered sleeve 1 and the fixing ring 2, compared with simple cylindrical cooperation or planar contact. When subjected to external forces, the larger contact area can more evenly distribute stress and reduce local stress concentration, thereby enhancing the strength and load-bearing capacity of the connection part, so that the casing connection device can better withstand loads under various working conditions. When the cylindrical pin 31 is inserted into the straight slot and screwed into the groove, the close cooperation of the cylindrical section 32 and the cylindrical hole can provide stable support and constraint for the cylindrical pin 31. At the same time, the cooperation of the conical section 33 and the tapered hole also has a certain self-locking effect in the axial direction, further enhancing the locking effect between the cone 3 and the tapered sleeve 1 and the fixing ring 2, effectively preventing loosening or falling due to factors such as vibration and impact, and ensuring the long-term stability and reliability of the casing connection. Moreover, the casing connection device can adapt to a certain range of size changes. For example, when there are slight differences in the diameter or wall thickness of the casing, the automatic centering and compensation function of the tapered structure can better adapt to these changes, still achieving good connection effect, improving the versatility and interchangeability of the casing connection device, and reducing production costs and inventory management difficulty. The cooperation mode of the cylindrical section 32 and the conical section 33 facilitates the adjustment and maintenance of the casing connection device. If fine adjustment or replacement of the connection part is needed, the cone 3 can be easily rotated out by a certain angle, without the need for complex disassembly and reassembly process, improving the maintenance efficiency and convenience. Moreover, when subjected to axial or radial loads, the structure of the conical section 33 and the cylindrical section 32 can reasonably disperse the stress to the entire connection part. The conical section 33 can convert part of the axial force into radial force, together with the cylindrical section 32 to bear the load, avoiding excessive stress concentration in a certain part, thereby reducing the risk of fatigue failure or local damage of the connection part, and prolonging the service life of the casing connection device.

[0029] In one specific embodiment, with reference to Figure 3The straight slot 22 can be through both ends of the fixing ring 2, or can not be through the other end of the fixing ring. The recess 23 is communicated with the straight slot 22, so that the pin 31 entering the straight slot enters the recess with the rotation of the cone. Specifically, the recess is arranged in the interior of the fixing ring, or can be arranged at the end of the fixing ring away from the straight slot. The straight slot and the recess can be vertically arranged, or can be arranged in an arc shape, as long as the pin can be rotated into the recess, and the specific arrangement is not limited in the embodiment.

[0030] Embodiment 2

[0031] Based on the embodiment 1, referring to Figure 1 and Figure 3 The limiting column 4 is a pin or a bolt, and the limiting column 4 passes through the limiting hole 24 on the fixing ring and penetrates the recess 23. When the cone 3 is rotated to the position and the pin 31 is completely rotated into the recess 23, the limiting column 4 is inserted into the recess 23 to block the movement of the pin 31 in the recess 23, thereby further enhancing the reliability of the connection, preventing the pin 31 from being pulled out of the recess 23 due to external force and other factors, and ensuring the safety of the casing connection device during use. When disassembling, the limiting column is taken out, the cone is rotated to move the pin out of the straight slot, so that the cone is taken out, and the separation of the cone sleeve and the fixing ring is realized.

[0032] Embodiment 3

[0033] The utility model also provides a casing, adopts the casing connection device that embodiment 1 or embodiment 2 discloses. At the connecting part of the casing, the casing is connected tightly by the casing connection device. For example, at the connecting part of the upper and lower sections of the casing, the cone sleeve 1 is installed (welded) at the end of the lower section of the casing, the fixing ring is installed (welded) at the end of the upper section of the casing, and then the cooperation of the cone 3 and the pin 31 with the straight slot 22, the recess 23 and the limiting column 4 is utilized to realize the locking connection of the upper and lower sections of the casing. The casing connection device is simple in structure and convenient to operate, can quickly realize the connection of the casing, is firm and reliable in connection, is suitable for the casing construction under various geological conditions, and effectively improves the construction efficiency and engineering quality.

[0034] The above embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection range of the utility model.

Claims

1. A casing connection apparatus, characterized by: The device comprises a cone sleeve, a fixing ring and a cone; The cone sleeve is provided with a first through hole, The cone is provided with at least one pin, The fixing ring is provided with a second through hole, and along the axial direction of the second through hole, a straight slot matching the pin is arranged, and along the radial direction of the second through hole, a groove communicating with the straight slot is arranged; When the first through hole and the second through hole are aligned, the pin of the cone is inserted into the straight slot, and the cone is rotated so that the pin is screwed into the groove, thereby realizing the locking connection of the cone sleeve, the fixing ring and the cone.

2. A bushing connection arrangement as claimed in claim 1, characterized in that: The cone comprises a cylindrical segment and a conical segment, and the pin is arranged on the cylindrical segment.

3. A bushing connection arrangement as claimed in claim 2, characterized in that: The first through hole is a tapered hole matching the conical segment, and the second through hole is a cylindrical hole matching the cylindrical segment.

4. A bushing connection arrangement as claimed in claim 3, characterized in that: The pin is two, symmetrically distributed along the diameter of the cylindrical segment.

5. The bushing connection of claim 1, wherein: It also comprises a limiting column for blocking the movement of the pin in the groove after the cone is rotated into place.

6. A bushing connection arrangement as claimed in claim 5, characterized in that: The limiting column is a pin or a bolt, which penetrates the groove.

7. A guard cylinder characterized by, The device is used for the connection of a protector.

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