An expansion anchor device

Abstract

The present invention discloses an expansion anchor device, comprising a grouting rod, a sealing section, an expansion tube and an expansion adaptive part. The grouting rod is provided with sealing sections at intervals, and the grouting rod between the sealing sections is provided with expansion tubes. The expansion tube comprises a plurality of expansion sleeves which are connected and fixed in sequence. The expansion sleeve comprises a convex shell portion and a concave shell portion which are alternately arranged circumferentially. The inner shell wall of the concave shell portion is connected with a top support piece via a welding rod. A sliding seam 1 is respectively provided at both ends of the concave shell portion, and a sliding seam 2 corresponding to the sliding seam 1 is respectively provided at both ends of the top support piece. The expansion adaptive part comprises a driving part, a transmission part and a top support part. The driving part drives the transmission part to control the top support part to lift the top support piece. The top support piece lifts the concave shell portion to drive the expansion sleeve to expand, thereby causing the expansion tube to expand outward.

Description

Technical Field

[0001] The invention relates to the technical field of anchor rod devices, in particular to an expansion type anchor rod device. Background Art

[0002] During the construction and operation of railway projects, especially when passing through complex geological conditions such as soft and broken strata (such as carbonaceous slate, carbonaceous phyllite and chlorite schist), the stability of tunnels and slopes is particularly prominent. These strata are very prone to rapid and large-scale deformation after excavation disturbance due to the loose and broken rock mass and poor self-stability, leading to a series of serious problems such as concrete cracking and falling, steel frame twisting and breaking, arch uplift, support deformation and limit intrusion. These problems not only increase the difficulty and cost of construction, but also seriously threaten the safety and stability of railway projects.

[0003] Traditional support measures, such as small pre-grouting pipes, annular self-propelled hollow grouting anchors, strengthening steel arch frame models and reducing steel frame spacing, can alleviate surrounding rock deformation to a certain extent, but are often difficult to effectively ensure the stability of the surrounding rock and the safety of the support structure during the construction of soft rock large deformation tunnels. Moreover, when the anchor rod acts on the surrounding rock for a long time, gaps will gradually appear between the anchor rod and the surrounding rock. The existing expansion anchor rod device only expands the anchor rod during the initial construction operation to improve the tightness between the anchor rod and the surrounding rock. In the later stage, it is difficult for the anchor rod to adapt to the deformation of the surrounding rock for adaptive expansion.

[0004] Therefore, it is necessary to provide an expansion anchor device to solve the problems raised in the above background technology. Summary of the invention

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an expansion anchor device, comprising a grouting rod, a sealing section, an expansion tube and an expansion adaptive member, the grouting rod is provided with sealing sections at intervals, and the grouting rod between the sealing sections is provided with expansion tubes, the expansion tube comprises a plurality of expansion sleeves which are connected and fixed in sequence, the expansion sleeve comprises a convex shell portion and a concave shell portion which are arranged alternately in the circumferential direction, the inner shell wall of the concave shell portion is connected with a top support piece by a welding rod, the two ends of the concave shell portion are respectively provided with a sliding seam 1, and the two ends of the top support piece are respectively provided with a sliding seam 2 corresponding to the sliding seam 1, the expansion adaptive member comprises a driving part, a transmission part and a top support part, the top support part is installed on the inner side of the top support piece, the two ends of the top support part are respectively provided with a transmission part, the head of the transmission part is connected to the end of the top support part, the driving part is arranged on the grouting rod corresponding to the sliding seam 2, and the tails of adjacent transmission parts are respectively connected to the two ends of the driving part, the driving part drives the transmission part to control the top support part to lift the top support piece, and the top support piece lifts the concave shell part to drive the expansion sleeve to expand.

[0006] Furthermore, as a preference, the top support portion includes a pipe sleeve, a middle tube wall of the pipe sleeve is provided with a radial sliding hole corresponding to the top support piece, a top support column slides through the sliding hole, an outer end of the top support column is fixedly connected to the top support piece, and two one-way slots are respectively arranged on the inner tube walls at both ends of the pipe sleeve.

[0007] Further, as a preference, the transmission part includes a transmission sleeve 2, the inner shell wall of the rear end of the transmission sleeve 2 is provided with a one-way slot 1, the outer shell wall of the head end of the transmission sleeve 2 is provided with a accommodating groove 2, a top block 2 that cooperates with the one-way slot 2 is slidably arranged on the accommodating groove 2, the bottom end of the top block 2 is connected to the bottom of the accommodating groove 2 by a spring 4, a conical top block is installed at the head end of the transmission sleeve 2, the conical top block is provided with circumferentially distributed sliding grooves 3, and a guide slide is formed between adjacent sliding grooves 3, a transmission sleeve 1 is slidably installed at the rear end of the transmission sleeve 2, the outer shell wall of the head end of the traditional sleeve 1 is provided with a accommodating groove 1, a top block 1 that cooperates with the one-way slot 1 is slidably arranged on the accommodating groove 1, and the bottom end of the top block 1 is connected to the bottom of the accommodating groove 1 by a spring 3.

[0008] Further, as a preference, the conical ends of the two conical top blocks can be engaged and axially slidable.

[0009] Further, as a preference, a accommodating cone cavity is provided at the center of the head end of the second transmission sleeve, and the accommodating cone cavity is connected to the third sliding slot.

[0010] Further, preferably, the driving part includes a sliding sleeve slidably connected to the grouting rod, the outer shell wall of the sliding sleeve is equipped with an elastic top column corresponding to the second sliding seam and radially arranged, and the end of the sliding sleeve is connected and fixed to the tail end of the transmission sleeve one.

[0011] Further, as a preference, the elastic top column comprises a column rod fixed with a sliding sleeve, a column sleeve is slidingly sleeved on the column rod, and the column sleeve is connected to the column rod through a second spring.

[0012] Further, as a preference, the sealing section comprises a sealing sleeve fixedly sleeved on the outside of the grouting rod, a middle outer shell wall of the sealing sleeve being provided with an accommodating ring groove, a sealing bag being installed in the accommodating ring groove, a spring 1 being installed at the center of one end of the sealing sleeve close to the expansion tube, one end of the spring 1 being connected to the sealing sleeve, and the other end of the spring 1 being connected to a sliding sleeve in a driving part at the end of the expansion tube.

[0013] Further, preferably, the sealing sleeve axially presses the end of the expansion tube.

[0014] Furthermore, preferably, an anchor head is installed at one end of the grouting rod extending into the borehole, and the end of the grouting pipe away from the borehole is fixed at the borehole mouth through an external end seat, and an internal solid section for solidifying slurry is formed between the sealing section near the bottom of the borehole and the bottom of the borehole.

[0015] Compared with the prior art, the present invention provides an expansion anchor device, which has the following beneficial effects:

[0016] The present invention adopts the structural design of the driving part, the transmission part, the supporting part, the supporting plate and the expansion tube, so that when there is any change in the texture structure of the drilling area, it will be transmitted to the elastic supporting column in the driving part in time, driving the elastic supporting column to move axially, and the elastic supporting column will drive the sliding sleeve to move, and the sliding sleeve will drive the transmission sleeve in the transmission part to move axially. In addition, the structural design of the transmission part is such that once the sliding sleeve moves axially, the axial displacement of the combined transmission part can be increased, thereby triggering the supporting column in the supporting part to move radially outward, and the supporting column drives the supporting plate to support the concave shell part in the expansion sleeve, thereby prompting the expansion tube to expand, so that the expansion tube is fully contacted and fixed with the wall of the drilling hole, and can adaptively cooperate with the change in the texture structure, so that the expansion tube can expand adaptively and enhance the anchoring strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of an expansion anchor device of the present invention;

[0018] Figure 2 It is a schematic diagram of the local structure of the sealing section of the present invention;

[0019] Figure 3 It is a schematic diagram of the local structure of the expansion adaptive member of the present invention;

[0020] Figure 4 It is a schematic diagram of the local structure of the top support sheet of the present invention;

[0021] Figure 5 It is a schematic diagram of the local structure of the expansion sleeve of the present invention;

[0022] Figure 6 It is a schematic diagram of the local structure of the welding rod of the present invention;

[0023] Figure 7 It is a schematic diagram of the local structure of the driving part of the present invention;

[0024] Figure 8 It is a schematic diagram of the local structure of the transmission part of the present invention;

[0025] Fig. 9 It is a schematic diagram of the local structure of the top support part of the present invention;

[0026] In the figure: 1, grouting rod; 2, sealing section; 3, expansion tube; 4, top support piece; 5, expansion adaptive member; 6, anchor head; 7, inner fixing section; 8, outer end seat; 9, drilling hole; 21, sealing sleeve; 22, sealing capsule; 23, spring 1; 211, accommodating ring groove; 31, expansion sleeve; 311, convex shell part; 312, concave shell part; 313, welding rod; 314, sliding joint 1; 41, sliding joint 2; 51, driving part; 52, transmission part; 53, top support part; 511, sliding sleeve; 512, elastic top column; 5121, Column rod; 5122, column sleeve; 5123, spring 2; 521, transmission sleeve 1; 522, transmission sleeve 2; 523, conical top block; 5211, accommodating groove 1; 5212, top block 1; 5213, spring 3; 5221, accommodating groove 2; 5222, top block 2; 5223, spring 4; 5224, one-way slot 1; 5225, accommodating cone cavity; 5231, sliding slot 3; 5232, guide slide; 531, pipe sleeve; 532, top support column; 533, one-way slot 2; 5311, sliding hole. DETAILED DESCRIPTION

[0027] Reference Figure 1-9 The present invention provides a technical solution: an expansion anchor device, comprising a grouting rod 1, a sealing section 2, an expansion tube 3 and an expansion adaptive member 5, wherein the sealing sections 2 are installed at intervals on the grouting rod 1, and the expansion tube 3 is installed on the grouting rod 1 between the sealing sections 2, and the expansion tube 3 comprises a plurality of expansion sleeves 31 which are connected and fixed in sequence, and the expansion sleeve 31 comprises a convex shell portion 311 and a concave shell portion 312 which are alternately arranged in the circumferential direction, and the inner shell wall of the concave shell portion 312 is connected to a top support piece 4 through a welding rod 313, and the two ends of the concave shell portion 312 are respectively provided with a sliding seam 314, and the two ends of the top support piece 4 are respectively provided with a sliding seam 314. 314 corresponds to the sliding joint 2 41, the expansion adaptive part 5 includes a driving part 51, a transmission part 52 and a supporting part 53, the supporting part 53 is installed on the inner side of the supporting piece 4, the two ends of the supporting part 53 are respectively provided with a transmission part 52, the head of the transmission part 52 is connected to the end of the supporting part 53, the driving part 51 is arranged on the grouting rod 1 corresponding to the sliding joint 2 41, and the tails of the adjacent transmission parts 52 are respectively connected to the two ends of the driving part 51, the driving part 51 drives the transmission part 52 to control the supporting part 53 to lift the supporting piece 4, and the supporting piece 4 lifts the concave shell part 312 to drive the expansion sleeve 31 to expand.

[0028] In this embodiment, the supporting portion 53 includes a sleeve 531, and the middle tube wall of the sleeve 531 is provided with a radial sliding hole 5311 corresponding to the supporting piece 4, and a supporting column 532 slides through the sliding hole 5311, and the outer end of the supporting column 532 is fixedly connected to the supporting piece 4, and the inner tube walls at both ends of the sleeve 531 are respectively arranged with two one-way slots 533; that is, the outer end of the supporting column 532 is fixed to the middle part of the supporting piece 4, and the supporting piece 4 is fixed to the concave shell part 312 through the welding rod 313, and the supporting column 532 slides through the sliding hole 5311, and at the same time, it has a limiting effect on the sleeve 531; therefore, when the supporting column 532 moves radially outward, the outer end of the supporting column 532 pushes the supporting piece 4 to move outward, and the supporting piece 4 pushes the concave shell part 312 to expand outward, which can promote the expansion tube 3 to expand.

[0029] In this embodiment, the transmission part 52 includes a transmission sleeve 522, the rear inner shell wall of the transmission sleeve 522 is provided with a one-way card groove 5224, the head outer shell wall of the transmission sleeve 522 is provided with a receiving groove 5221, and a top block 5222 cooperating with the one-way card groove 533 is slid on the receiving groove 5221, and the bottom end of the top block 5222 is connected to the bottom of the receiving groove 5221 through a spring 5223, and the head end of the transmission sleeve 522 is installed with a conical top block 523. The conical top block 523 is provided with circumferentially distributed sliding slots 3 5231, and a guide slide 5232 is formed between adjacent sliding slots 3 5231. The tail of the transmission sleeve 2 522 is slidably mounted with the transmission sleeve 1 521, and the head shell wall of the conventional sleeve 1 521 is provided with a receiving groove 1 5211, and a top block 1 5212 cooperating with the one-way card groove 1 5224 is slidably arranged on the receiving groove 1 5211, and the bottom end of the top block 1 5212 is connected to the bottom of the receiving groove 1 5211 through a spring 3 5213; combined Figure 7-Figure 9As shown, the one-way slot 533 only allows the top block 5222 to move in one direction toward the top support column 532, that is, when the transmission sleeve 522 is moved in the direction of the top support column 532, the transmission sleeve 522 can move axially, and the conical top block 523 at the head end of the transmission sleeve 522 will push the top support column 532, causing the top support column 532 to move radially outward. When the transmission sleeve 522 is moved away from the top support column 532, the top block 5222 is locked with the one-way slot 533; wherein the one-way slot 1 5224 only allows the top block 5222 to move in one direction toward the top support column 532. 12 moves unidirectionally away from the top support column 532, that is, when the transmission sleeve 521 is moved in the direction of the top support column 532, the top block 5212 is locked with the one-way slot 5224, and when the transmission sleeve 521 is moved away from the top support column 532, the transmission sleeve 521 can move axially; that is to say, when the driving part 51 is subjected to an axial situation (that is, moving toward or away from the bottom of the borehole 9), with the cooperation of the driving part 51 and the transmission part 52, the top support column 532 can be pushed to move radially outward, thereby causing the expansion tube 3 to expand outward.

[0030] In this embodiment, the conical ends of the two conical top blocks 523 can be engaged and axially slidable; wherein the one-way slot 1 5224 and the one-way slot 2 533 are both annular structures, therefore, combined with Figure 7 As shown, the alignment and engagement of the two conical top blocks 523 can be quicker and more efficient.

[0031] In this embodiment, a receiving cone cavity 5225 is provided at the center of the head end of the second transmission sleeve 522, and the receiving cone cavity 5225 is communicated with the third sliding slot 5231, so that the two conical top blocks 523 can be more fully engaged and moved.

[0032] In this embodiment, the driving part 51 includes a sliding sleeve 511 which is slidably connected to the grouting rod 1, and the outer shell wall of the sliding sleeve 511 is installed with an elastic top column 512 which corresponds to the sliding seam 2 41 and is radially arranged, and the end of the sliding sleeve 511 is connected and fixed to the tail end of the transmission sleeve 1 521; wherein, the elastic top column 512 can elastically expand and contract radially, and when the elastic top column 512 is compressed and contracted, the outer end of the elastic top column 512 can be located in the concave cavity of the concave shell part 312, so that the expansion anchor device can be smoothly installed in the borehole 9, and when it is installed After completion, the elastic top column 512 is acted upon by elastic force to radially push against the wall of the borehole 9 and can have a radial stretching effect. Therefore, when the texture structure of the borehole 9 area changes, it can be transmitted to the elastic top column 512 in time, thereby driving the elastic top column 512 to move axially, and the elastic top column 512 will drive the sliding sleeve 511 to move, and the sliding sleeve 511 will drive the transmission sleeve 521 to move axially, prompting the expansion tube 3 to expand, so that the expansion tube 3 is fully contacted and fixed with the wall of the borehole 9.

[0033] In this embodiment, the elastic top column 512 includes a column rod 5121 fixed to the sliding sleeve 511, a column sleeve 5122 slidingly sleeved on the column rod 5121, and the column sleeve 5122 and the column rod 5121 are connected via a second spring 5123.

[0034] In this embodiment, the sealing section 2 includes a sealing sleeve 21 fixedly sleeved on the outside of the grouting rod 1, the middle outer shell wall of the sealing sleeve 21 is provided with an accommodating annular groove 211, a sealing bag 22 is installed in the accommodating annular groove 211, a spring 23 is installed at the center of the sealing sleeve 21 close to one end of the expansion tube 3, one end of the spring 23 is connected to the sealing sleeve 21, and the other end of the spring 23 is connected to the sliding sleeve 511 in the driving part 51 at the end of the expansion tube 3.

[0035] In this embodiment, the sealing sleeve 21 axially presses the end of the expansion tube 3 .

[0036] In this embodiment, an anchor head 6 is installed at the end of the grouting rod 1 extending into the borehole 9, and the end of the grouting pipe 1 away from the borehole 9 is fixed at the mouth of the borehole 9 through an external end seat 8, and an internal fixed section 7 for solidified slurry is formed between the sealing section 2 near the bottom of the borehole 9 and the bottom of the borehole 9.

[0037] During the specific implementation, the elastic top column 512 is pressed so that the outer end of the elastic top column 512 is in the concave cavity of the concave shell portion 312, and then gradually embedded in the borehole 9. After the embedding is completed, the outer end seat 8 is installed to fix the grouting rod 1, and then the grouting rod 1 is used to inject grout into the bottom of the borehole 9 to form the inner fixed section 7. If the texture structure of the borehole 9 area changes, the driving part 51 can be triggered, and the driving part 51 drives the transmission part 52 to trigger the top support part 53, so as to realize the outward expansion of the expansion tube 3.

[0038] The above description is only a preferred specific implementation manner of the invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the invention, which should be covered by the protection scope of the present invention.

Claims

1. An expansion anchor device, comprising a grouting rod (1), a sealing section (2), an expansion tube (3) and an expansion adaptive member (5), characterized in that: The grouting rod (1) is provided with sealing sections (2) at intervals, and an expansion tube (3) is provided on the grouting rod (1) between the sealing sections (2). The expansion tube (3) comprises a plurality of expansion sleeves (31) which are connected and fixed in sequence, and the expansion sleeve (31) comprises a convex shell portion (311) and a concave shell portion (312) which are arranged alternately in the circumferential direction, and the inner shell wall of the concave shell portion (312) is connected to a top support plate (4) via a welding rod (313), and the two ends of the concave shell portion (312) are respectively provided with a sliding seam 1 (314), and the two ends of the top support plate (4) are respectively provided with a sliding seam 2 (41) corresponding to the sliding seam 1 (314), and the expansion adaptive member (5) comprises a driving portion ( 51), a transmission part (52) and a supporting part (53), wherein the supporting part (53) is installed on the inner side of the supporting sheet (4), and the two ends of the supporting sheet (53) are respectively provided with transmission parts (52), and the head of the transmission part (52) is connected to the end of the supporting part (53), and the driving part (51) is arranged on the grouting rod (1) corresponding to the second sliding joint (41), and the tails of the adjacent transmission parts (52) are respectively connected to the two ends of the driving part (51), and the driving part (51) drives the transmission part (52) to control the supporting part (53) to lift the supporting sheet (4), and the supporting sheet (4) lifts the concave shell part (312) to drive the expansion sleeve (31) to expand.

2. An expansion anchor device according to claim 1, characterized in that: The supporting portion (53) comprises a tube sleeve (531), a middle tube wall of the tube sleeve (531) is provided with a radial sliding hole (5311) corresponding to the supporting piece (4), a supporting column (532) slides through the sliding hole (5311), an outer end of the supporting column (532) is fixedly connected to the supporting piece (4), and two one-way slots (533) are arranged on the inner tube walls at both ends of the tube sleeve (531) respectively.

3. An expansion anchor device according to claim 2, characterized in that: The transmission part (52) comprises a second transmission sleeve (522), the rear inner shell wall of the second transmission sleeve (522) is provided with a one-way clamping groove (5224), the head outer shell wall of the second transmission sleeve (522) is provided with a second accommodating groove (5221), a second top block (5222) cooperating with the second one-way clamping groove (533) is slidably arranged on the second accommodating groove (5221), the bottom end of the second top block (5222) is connected to the bottom of the second accommodating groove (5221) through a spring four (5223), the head end of the second transmission sleeve (522) is provided with a conical top block (523), and the conical top block (523) is provided on the head end of the second transmission sleeve (522). The shaped top block (523) is provided with circumferentially distributed sliding slits three (5231), and guide slides (5232) are formed between adjacent sliding slits three (5231). The tail of the transmission sleeve two (522) is slidably mounted with the transmission sleeve one (521), and the head shell wall of the conventional sleeve one (521) is provided with a receiving groove one (5211), and the receiving groove one (5211) is slidably provided with a top block one (5212) matched with a one-way slot one (5224), and the bottom end of the top block one (5212) is connected to the bottom of the receiving groove one (5211) through a spring three (5213).

4. An expansion anchor device according to claim 3, characterized in that: The conical ends of the two conical top blocks (523) are capable of being engaged and axially slidable.

5. The expansion anchor device according to claim 3, characterized in that: A accommodating cone cavity (5225) is provided at the center of the head end of the second transmission sleeve (522), and the accommodating cone cavity (5225) is communicated with the third sliding slot (5231).

6. The expansion anchor device according to claim 3, characterized in that: The driving part (51) comprises a sliding sleeve (511) slidably connected to the grouting rod (1); an outer shell wall of the sliding sleeve (511) is provided with an elastic top column (512) corresponding to the second sliding seam (41) and arranged radially; and an end of the sliding sleeve (511) is connected and fixed to the tail end of the first transmission sleeve (521).

7. An expansion anchor device according to claim 6, characterized in that: The elastic top column (512) comprises a column rod (5121) fixed to the sliding sleeve (511), a column sleeve (5122) slidingly sleeved on the column rod (5121), and the column sleeve (5122) and the column rod (5121) are connected via a second spring (5123).

8. An expansion anchor device according to claim 6, characterized in that: The sealing section (2) comprises a sealing sleeve (21) fixedly sleeved on the outside of the grouting rod (1); a central outer shell wall of the sealing sleeve (21) is provided with an accommodating annular groove (211); a sealing bag (22) is installed in the accommodating annular groove (211); a spring (23) is installed at the center of the sealing sleeve (21) close to one end of the expansion tube (3); one end of the spring (23) is connected to the sealing sleeve (21); and the other end of the spring (23) is connected to a sliding sleeve (511) in a driving part (51) at the end of the expansion tube (3).

9. An expansion anchor device according to claim 8, characterized in that: The sealing sleeve (21) axially presses the end of the expansion tube (3).

10. An expansion anchor device according to claim 1, characterized in that: An anchor head (6) is installed at one end of the grouting rod (1) extending into the borehole (9), and the end of the grouting pipe (1) away from the borehole (9) is fixed at the mouth of the borehole (9) through an outer end seat (8), and an inner fixing section (7) for solidifying slurry is formed between the sealing section (2) near the bottom of the borehole (9) and the bottom of the borehole (9).

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