Closed type seam pipe anchor rod

Abstract

The utility model relates to the technical field of seam pipe anchor rods, and discloses a closed seam pipe anchor rod which comprises a seam pipe anchor rod body, the seam pipe anchor rod body comprises a rod body and a conical rod head, a deformation joint is formed in the seam pipe anchor rod body in the longitudinal direction, a closed assembly is arranged on the inner side of the deformation joint, and the closed assembly comprises interlayer limiting structures located on the two sides of the main deformation joint. An arc-shaped main sealing plate is arranged between the interlayer limiting structures on the two sides, and an auxiliary sealing plate used for closing the auxiliary deformation joint is arranged at the end, close to the conical rod head, of the main sealing plate. By arranging the closing assembly, under the combined action of the main sealing plate and the auxiliary sealing plate, the whole deformation joint is closed, and external underground water, acid, alkali, salt and other pollutants are effectively prevented from entering the seam pipe anchor rod along the deformation joint and corroding the seam pipe anchor rod from inside to outside, so that degradation of the seam pipe anchor rod is slowed down, the service life of the seam pipe anchor rod is prolonged, and the service life of the seam pipe anchor rod is prolonged. And the continuous anchoring force of the seam pipe anchor rod is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of slotted pipe anchor rod, and particularly relates to a closed slotted pipe anchor rod. BACKGROUND

[0002] The slotted pipe anchor rod is a full-length anchoring, and the main body part is a high-strength steel pipe with a longitudinal slot, and the working principle is as follows: the slotted pipe anchor rod is driven into a borehole with a slightly smaller diameter by applying an external force, the slotted steel pipe is compressed, the outer wall of the steel pipe is tightly pressed against the borehole wall, the slotted pipe anchor rod generates radial pressure and friction resistance on the borehole wall in the full-length range, and in addition, the support force of the anchor rod body outer end tray jointly reinforces the rock-soil body.

[0003] The slotted pipe anchor rod does not need grouting or resin curing, has high mechanized installation efficiency, and can deform to a certain extent without failure, and can adapt to the deformation of the rock-soil body, and therefore, is widely applied to the fields of rock-soil engineering, such as mine roadway, tunnel engineering, and slope support, especially in broken rock mass or dynamic pressure environment.

[0004] However, the slotted pipe anchor rod is often directly exposed to the corrosive environment of underground water, acid, alkali, and salt in the long-term anchoring process, and is corroded from the outside to the inside, in addition, the corrosive substances also enter the inside of the slotted pipe anchor rod along the slot, causing the slotted pipe anchor rod to be corroded from the inside to the outside synchronously, and accelerating the damage of the slotted pipe anchor rod and the loss of anchoring strength. SUMMARY

[0005] Therefore, the utility model aims at providing a closed slotted pipe anchor rod to solve the technical problem that the corrosive substances enter the inside of the slotted pipe anchor rod along the slot, causing the slotted pipe anchor rod to be corroded from the inside to the outside synchronously.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A closed slotted pipe anchor rod, comprising a slotted pipe anchor rod, the slotted pipe anchor rod comprising a rod body and a conical rod head, a deformation slot is longitudinally arranged on the slotted pipe anchor rod, the deformation slot comprising a main deformation slot corresponding to the rod body and a secondary deformation slot corresponding to the conical rod head, a closing assembly is arranged on the inner side of the deformation slot, the closing assembly is used for closing the deformation slot, the closing assembly comprising a sandwich limiting structure arranged on both sides of the main deformation slot, the sandwich limiting structure comprising an arc-shaped outer plate and an arc-shaped inner plate arranged on the inner side of the outer plate, an installation limiting space is formed between the outer plate and the inner plate, an arc-shaped main sealing plate is arranged between the sandwich limiting structures on both sides, the main sealing plate passes through the installation limiting space, the main sealing plate is used for closing the main deformation slot, and a secondary sealing plate used for closing the secondary deformation slot is arranged on the end of the main sealing plate close to the conical rod head.

[0008] Further, the outer plate and the inner plate inner side are further provided with connecting pieces, the connecting pieces distributed at both ends of the rod body connect and fix the inner plate, a communication groove is formed in the middle of the connecting piece along the extending direction of the connecting piece, the communication groove is equal to the width of the installation limiting space and the two are opposite to each other;

[0009] Further, the thickness of the main sealing plate is consistent with the width of the installation limiting space, the main sealing plate passes through the installation limiting space and partially extends into the communication groove;

[0010] Further, the auxiliary sealing plate is in the shape of an arc plate and gradually narrows in width along the direction away from the main sealing plate, the inner plate surface of the auxiliary sealing plate is tightly combined with the inner side of the conical rod head;

[0011] Further, the inner side of the main sealing plate is symmetrically provided with limiting protrusions, the limiting protrusions on both sides are respectively abutted with the inner side of the inner plate on both sides, thereby limiting the main sealing plate and the auxiliary sealing plate;

[0012] Further, multiple secondary support assemblies are arranged in the rod body along the axial direction, the secondary support assembly comprises multiple limiting seats arranged on the inner side of the rod body and distributed along the circumferential direction, a receiving groove is formed in the free end surface of the limiting seat towards the side of the axis of the rod body, a pressure bearing disc is arranged on the inner side of the limiting seat, and the flange of the pressure bearing disc extends into the receiving groove;

[0013] Further, the cross section of the receiving groove is in the shape of an acute angle and the width of the receiving groove gradually decreases along the radial direction of the rod body, the two side walls of the receiving groove are in the shape of an arc, and multiple receiving grooves jointly form a complete limiting space;

[0014] Further, the edge of the pressure bearing disc is inwardly contracted along the trajectory of a parabola to form a flange with an acute angle, and the cross section size of the pressure bearing disc is smaller than the cross section size of the limiting space formed by the multiple receiving grooves;

[0015] Further, the tail end of the rod body is further provided with a blocking ring.

[0016] The beneficial effects of the utility model lie in:

[0017] Compared with the prior art, by arranging the closing assembly, under the joint action of the main sealing plate and the auxiliary sealing plate, the deformation joint is closed, external underground water, acid, alkali, salt and other pollutants are prevented from entering the inside of the joint pipe anchor rod along the deformation joint and corroding the joint pipe anchor rod from the inside to the outside, thereby slowing down the deterioration of the joint pipe anchor rod and prolonging the service life of the joint pipe anchor rod, and the joint pipe anchor rod has sustained anchoring force. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to make the purpose, technical scheme and beneficial effects of the utility model more clear, the utility model provides the following drawings for description:

[0019] Figure 1The whole structure schematic view of the closed type seam pipe anchor rod in the embodiment one of the utility model;

[0020] Figure 2 The schematic view of the closed assembly in the embodiment one of the utility model;

[0021] Figure 3 For Figure 2 The enlarged view of A1 in the middle;

[0022] Figure 4 The schematic view of the outer plate, the inner plate and the connecting piece in the embodiment one of the utility model, for showing the positional relationship and the connecting relationship of the three;

[0023] Figure 5 The schematic view of the main sealing plate and the auxiliary sealing plate in the embodiment one of the utility model;

[0024] Figure 6 The schematic view of the secondary support assembly in the embodiment one of the utility model;

[0025] Figure 7 The schematic view of the limiting seat and the pressure bearing disc in the embodiment one of the utility model, for showing the positional relationship and the connecting relationship of the two;

[0026] Figure 8 The front view of the limiting seat and the pressure bearing disc in the embodiment one of the utility model;

[0027] Figure 9 For Figure 8 The enlarged view of A2 in the middle.

[0028] The signs in the drawings are as follows:

[0029] Seam pipe anchor rod 1, rod body 101, conical rod head 102, main deformation seam 103, auxiliary deformation seam 104, closed assembly 2, outer plate 201, inner plate 202, connecting piece 203, main sealing plate 204, limiting protrusion 205, auxiliary sealing plate 206, communication groove 207, secondary support assembly 3, limiting seat 301, accommodating groove 302, pressure bearing disc 303, flange 304, through hole 305, stop ring 4. Specific implementation

[0030] The embodiment one, as shown in Figures 1-9 .

[0031] A closed type seam pipe anchor rod, comprising a seam pipe anchor rod 1, the seam pipe anchor rod 1 includes a columnar rod body 101 and a conical rod head 102 at the end of the rod body 101, a deformation seam is formed on the seam pipe anchor rod 1 along the longitudinal direction, and the inner side of the deformation seam is provided with a closed assembly 2, so that the closed assembly 2 is used to realize the closure of the deformation seam.

[0032] As Figure 1As shown, the deformation joint includes a main deformation joint 103 corresponding to the rod body 101 and a secondary deformation joint 104 corresponding to the tapered rod head 102, and the closure assembly 2 includes a sandwich limiting structure on both sides of the main deformation joint 103 and symmetrically distributed with the main deformation joint 103 as the symmetric axis. The sandwich limiting structure includes an arc-shaped outer plate 201 and an arc-shaped inner plate 202 inside the outer plate 201. The outer plate 201 and the inner plate 202 are equal in length and their two ends are flush with the two ends of the rod body 101. A gap of equal width is left between the outer plate 201 and the inner plate 202, and an installation limiting space is formed thereby.

[0033] It is worth noting that in this embodiment, the inner side of the outer plate 201 is flush with the inner side of the inner plate 202, the outer side of the outer plate 201 and the outer side of the inner plate 202 are flush with the side surface of the main deformation joint 103, and in addition, the outer plate surface of the outer plate 201 is completely attached to the inner side of the rod body 101 and the outer plate 201 and the rod body 101 are fixed by welding.

[0034] The inner side of the outer plate 201 and the inner plate 202 is also provided with a connecting piece 203, and the connecting piece 203 distributed at both ends of the rod body 101 connects and fixes the inner plate 202. Specifically, the connecting piece 203 is in the shape of an arc plate, its outer plate surface is completely attached to the inner side of the rod body 101 and is fixed by welding, and the extension direction of its inner plate surface coincides with the extension direction of the inner plate 202. A communication groove 206 is provided in the middle of the connecting piece 203 along the extension direction of the connecting piece 203, and the communication groove 206 is equal in width to the installation limiting space and opposite to it.

[0035] An arc-shaped main sealing plate 204 is provided between the two sandwich limiting structures, the thickness of the main sealing plate 204 is consistent with the width of the installation limiting space, and the main sealing plate 204 passes through the installation limiting space and partially extends into the communication groove 206. The main deformation joint 103 is closed by the main sealing plate 204. During the continuous anchoring process, the slot pipe anchor rod 1 deforms under the action of external force, the width of the main deformation joint 103 decreases, and at the same time, the main sealing plate 204 slides between the two sandwich limiting structures, so that the exposed surface of the main sealing plate 204 synchronously decreases with the width of the main deformation joint 103. The main sealing plate 204 always provides a closing effect on the main deformation joint 103, and it is worth emphasizing that the main sealing plate 204 does not limit the deformation of the main deformation joint 103. It needs to be further explained that the exposed surface of the main sealing plate 204 is the part where the main sealing plate 204 coincides with the main deformation joint 103.

[0036] As Figure 5As shown, the secondary sealing plate 206 is welded to the end of the main sealing plate 204 close to the conical rod head 102 for closing the secondary deformation joint 104, the secondary sealing plate 206 is in the shape of an arc plate and gradually narrows in width in the direction away from the main sealing plate 204, and the inner plate surface of the secondary sealing plate 206 is tightly combined with the inner side surface of the conical rod head 102. Similarly, the secondary sealing plate 206 does not limit the deformation of the secondary deformation joint 104, but can always close the secondary deformation joint 104.

[0037] In addition, in order to ensure that the main sealing plate 204 and the secondary sealing plate 206 are always stable during transportation, installation and subsequent anchoring, as shown in the drawings, Figure 3 As shown, the inner side surface of the main sealing plate 204 is symmetrically welded with a limiting protrusion 205, and the limiting protrusions 205 on both sides are respectively abutted with the inner side surface of the inner plate 202 on both sides, thereby playing a limiting role on the main sealing plate 204 and the secondary sealing plate 206.

[0038] Through the joint action of the main sealing plate 204 and the secondary sealing plate 206, the whole deformation joint is closed, effectively preventing external underground water, acid, alkali, salt and other pollutants from entering the inside of the joint pipe anchor rod 1 along the deformation joint and causing corrosion from the inside to the outside of the joint pipe anchor rod 1, thereby slowing down the deterioration of the joint pipe anchor rod 1 and prolonging its service life. It also ensures that the joint pipe anchor rod 1 has a sustained anchoring force.

[0039] In tunnel engineering, the joint pipe anchor rod is usually applied to surrounding rock support. The surrounding rock continuously deforms over time, especially when the local surrounding rock deforms greatly, which may cause the local deformation of the rod body to be too large, which may lead to the instability of the whole joint pipe anchor rod. Based on this, multiple secondary support assemblies 3 are arranged in the interior of the rod body 101 along the axial direction to resist the phenomenon of local deformation of the rod body caused by stress concentration.

[0040] As shown in the drawings, Figure 6 , Figure 7 The secondary support assembly 3 includes multiple limiting seats 301 arranged on the inner side surface of the rod body 101 and distributed in the circumferential direction, and the limiting seats 301 are fixedly welded with the inner side surface of the rod body 101. In this embodiment, there are three limiting seats 301, one of which is opposite to the main deformation joint 103, and the other two are symmetrically arranged on both sides of the main deformation joint 103. In this embodiment, the included angle between adjacent limiting seats 301 is 100°.

[0041] The limiting seat 301 is in the shape of a fan ring, and the free end surface of the limiting seat 301 towards the axis of the rod body 101 is provided with an accommodating groove 302, as shown in the drawings, Figure 9 The cross section of the accommodating groove 302 is in the shape of an acute angle, and the width of the accommodating groove 302 gradually decreases along the radial direction of the rod body 101, and the two side walls of the accommodating groove 302 are arc surfaces, and the three accommodating grooves 302 together constitute a complete limiting space.

[0042] The inner side of the limiting seat 301 is provided with a disc-shaped pressure bearing disc 303, the edge of the pressure bearing disc 303 is inwardly contracted along the trajectory of a parabola to form a flange 304 with an acute angle. The pressure bearing disc 303 is located between the three limiting seats 301, and the flange 304 of the pressure bearing disc 303 extends into the accommodating groove 302, the cross-sectional size of the pressure bearing disc 303 is smaller than the cross-sectional size of the limiting space formed by the three accommodating grooves 302, that is, only when the rod body 101 produces a certain degree of shrinkage deformation, that is, the size of the limiting space between the three accommodating grooves 302 is reduced, the flange 304 of the pressure bearing disc 303 will be in contact with the accommodating grooves 302 of the three limiting seats 301 at the same time. Conversely, during transportation or when the deformation degree of the rod body 101 is small, the pressure bearing disc 303 will not be separated from the accommodating groove 302.

[0043] Due to the influence of local surrounding rock deformation, the rod body 101 is locally deformed too much, the flange 304 of the pressure bearing disc 303 is in contact with the accommodating grooves 302 of the three limiting seats 301 at the same time, at this time, part of the surrounding rock pressure is converted into the radial pressure between the limiting seat 301 and the pressure bearing disc 303, under the action of the pressure bearing disc 303, the two sides of the accommodating groove 302 are expanded and deformed outwardly, thereby offsetting the radial pressure and preventing the rod body 101 from being locally deformed too much, forming a secondary support.

[0044] In addition, the middle part of the pressure bearing disc 303 is provided with a through hole 305, on the one hand, the strength of the pressure bearing disc 303 is reduced, when the local stress is too large, the pressure bearing disc 303 is more easily deformed, thereby sharing part of the load for the limiting seat 301, preventing the limiting seat 301 from being damaged to cause the secondary support assembly 3 to fail, on the other hand, the self-weight of the entire secondary support assembly 3 can be reduced to a certain extent.

[0045] The tail end of the rod body 101 is also welded with a stop ring 4 for supporting the anchor rod tray, in addition, the existence of the stop ring 4 can increase the structural stability of the anchor rod, preventing the deformation or damage of the pipe anchor rod during installation.

[0046] Finally, it should be explained that the above preferred embodiments are only used to illustrate the technical scheme of the utility model and not to limit, although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the range defined by the claims of the utility model.

Claims

1. A closed type of a slotted pipe anchor comprising a slotted pipe anchor including a shank and a tapered head, and a deformation slit being formed in the slotted pipe anchor in a longitudinal direction, the deformation slit including a main deformation slit corresponding to the shank and a sub deformation slit corresponding to the tapered head, characterized in that, The inner side of the deformation joint is provided with a closing assembly for closing the deformation joint, the closing assembly comprises sandwich limiting structures on both sides of the main deformation joint, the sandwich limiting structure comprises an arc-shaped outer plate and an arc-shaped inner plate inside the outer plate, an installation limiting space is formed between the outer plate and the inner plate, an arc-shaped main sealing plate is arranged between the sandwich limiting structures on both sides, the main sealing plate passes through the installation limiting space and closes the main deformation joint, and the end of the main sealing plate close to the head of the conical rod is provided with a secondary sealing plate for closing the secondary deformation joint.

2. A closed-end, threaded tubular anchor rod as defined in claim 1, wherein, The inner side of the outer plate and the inner plate is further provided with a connecting piece, the connecting piece at both ends of the rod body connects and fixes the inner plate, a communication groove is formed in the middle of the connecting piece along the extension direction of the connecting piece, the width of the communication groove is equal to that of the installation limiting space, and the two are opposite to each other.

3. A closed-end, threaded tubular anchor rod as defined in claim 2, wherein, The thickness of the main sealing plate is consistent with the width of the installation limiting space, the main sealing plate passes through the installation limiting space and partially extends into the communication groove.

4. A closed-end, threaded tubular anchor rod as defined in claim 3, wherein, The secondary sealing plate is in the shape of an arc-shaped plate and gradually narrows in width in a direction away from the main sealing plate, and the inner plate surface of the secondary sealing plate is tightly combined with the inner side of the head of the conical rod.

5. A closed-end suture tube anchor according to claim 4, wherein, The inner side of the main sealing plate is symmetrically provided with a limiting protrusion, and the limiting protrusions on both sides are respectively abutted with the inner side of the inner plate on both sides, thereby limiting the main sealing plate and the secondary sealing plate.

6. Closed suture anchor according to any one of claims 1 to 5, characterized in that A plurality of secondary support assemblies are arranged in the rod body in an axial direction, the secondary support assembly comprises a plurality of limiting seats arranged on the inner side of the rod body and distributed in a circumferential direction, an accommodation groove is formed in the free end surface of the limiting seat towards the axis of the rod body, a pressure bearing disc is arranged on the inner side of the limiting seat, and the flange of the pressure bearing disc extends into the accommodation groove.

7. A closed-end, threaded tubular anchor rod as defined in claim 6, wherein, The cross section of the accommodation groove is in the shape of an acute angle, and the width of the accommodation groove gradually decreases in a radial direction of the rod body, the two side walls of the accommodation groove are arc surfaces, and a plurality of accommodation grooves jointly form a complete limiting space.

8. A closed-end, threaded tubular anchor rod as defined in claim 7, wherein, The edge of the pressure bearing disc is inwardly contracted along the trajectory of a parabola to form a flange with an acute angle, and the cross-sectional size of the pressure bearing disc is smaller than that of the limiting space formed by the plurality of accommodation grooves.

9. A closed-end, threaded tubular anchor rod as defined in claim 8, wherein, The tail end of the rod body is further provided with a stop ring.

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