Bag type expansion anchor rod

Abstract

The utility model relates to the technical field of anchoring structural members, in particular to a bag type expansion anchor rod. According to the novel bag type expansion anchor rod, the lower end of the anchor rod body is fixedly and hermetically assembled with the lower bearing seat, the threaded sleeve is screwed on the anchor rod body on the upper side of the upper bearing seat, and the threaded sleeve is hermetically pressed on the bearing plate of the upper bearing seat, so that pressing sealing can be realized; and the threaded sleeve and the anchor rod body are fixedly sealed by filling the sealant, so that the sealing between the threaded sleeve and the anchor rod body is further realized, and the overall sealing effect is relatively good. And compared with an existing mode of winding a flexible sealing piece and screwing a locking nut, the sealing structure is convenient to assemble and manufacture, and the consistency of the sealing effect is easier to guarantee during large-scale manufacturing.

Description

Technical Field

[0001] The utility model relates to the technical field of anchoring structural components, in particular to a bag-type expanded anchor rod. Background Art

[0002] Anchor rods are widely used in infrastructure construction and are used in large quantities. As the reliability requirements of corresponding infrastructure facilities become higher and higher, better requirements are put forward for the bearing capacity and service life of anchor rods. The Chinese utility model patent with the authorization announcement number CN214656994U discloses a bladder-type expanded pressure-dispersed anchor rod with a built-in reinforced steel cage. The anchor rod includes an anchor rod bearing body and an anchor rod body, wherein the anchor rod bearing body includes two upper and lower bearing seats, and the two bearing seats include a bearing plate and a sleeve. The sleeve is fixedly connected to a side plate surface of the bearing plate, the sleeve of the upper bearing seat is located on the lower side of its bearing plate, and the sleeve of the lower bearing seat is located on the upper side of its bearing plate. A through hole is provided at the center of the bearing plate. The anchor rod body passes through the through holes at the center position of the bearing plates of the upper bearing seat and the lower bearing seat respectively and extends a part, and then the extended part of the anchor rod body is connected to the locking nut, and the locking nut is pressed against the bearing seat to realize the fixed connection between the anchor rod body and the upper bearing seat and the lower bearing seat.

[0003] In order to ensure that the slurry does not leak when grouting into the bag, in addition to ensuring the sealing between the two ends of the bag and the sleeve of the bearing seat, it is more important to ensure the sealing of the anchor rod body passing through the bearing seat. In the above-mentioned document, a flexible sealing component is arranged between the locking nut and the middle anchor rod body. The flexible sealing component can be a material with sealing function such as oil hemp, rubber strip, etc. The flexible sealing component is tightly wound along the thread pattern of the connecting part of the middle anchor rod body and the locking nut, and then the locking nut and the middle anchor rod body are locked, thereby enhancing the sealing effect between the locking nut and the middle anchor rod body. However, this sealing method has high requirements for the winding condition of the flexible sealing component and the compression condition between the locking nut and the bearing seat. In the process of mass production, the assembly consistency of these positions is not easy to ensure, which affects the sealing. In particular, the connection position between the upper bearing seat and the anchor rod body is exposed to the soil layer as a whole. Once the sealing is unreliable, it will have a great impact on the use effect of the anchor rod. Utility Model Content

[0004] The utility model aims to provide a bag-type expanded anchor rod, so as to solve the problem that the sealing structure between the upper bearing seat and the anchor rod body in the prior art is not easy to ensure the sealing reliability.

[0005] The bag - type expanding anchor of the utility model comprises upper and lower bearing seats arranged oppositely and an anchor rod body. The bearing plates of the upper and lower bearing seats are respectively provided with central holes for the anchor rod body to pass through. The anchor rod body is fixedly and hermetically assembled with the lower bearing seat. A threaded sleeve is screwed on the upper side of the upper bearing seat on the anchor rod body. The threaded sleeve is hermetically pressed on the bearing plate of the upper bearing seat. The threaded sleeve and the anchor rod body are fixedly sealed by filling sealant.

[0006] Further, the threaded sleeve has a sealing section for enclosing a sealed annular space with the anchor rod body, and the sealant is filled in the sealed annular space.

[0007] Further, the internal threaded section of the threaded sleeve is a segmented structure with axial intervals, and the sleeve body between adjacent two threaded sections constitutes the sealing section.

[0008] Further, a glue injection port penetrating the sleeve wall is arranged on the sleeve wall of the threaded sleeve at a position corresponding to the sealed annular space.

[0009] Further, the sealed annular space is in the middle area of the threaded sleeve.

[0010] Further, a stepped structure is arranged on the outer periphery of the lower end of the threaded sleeve. The small - diameter section of the stepped structure extends into the central hole of the bearing plate of the upper bearing seat, and the step surface of the stepped structure is pressed on the bearing plate of the upper bearing seat.

[0011] Further, a locking nut for locking the anchor rod body is integrally connected to the lower side surface of the lower bearing seat. The locking nut is a cylindrical structure with one end open and one end closed, and the open end of the locking nut is hermetically connected to the lower bearing seat.

[0012] Further, the bearing plate of the lower bearing seat and the locking nut are integrally formed stamping parts.

[0013] Further, the sealant is a quick - setting gel.

[0014] Further, the anchor rod body is deformed steel bar.

[0015] The utility model provides a new bag - type expanding anchor. The lower end of the anchor rod body is fixedly and hermetically assembled with the lower bearing seat. A threaded sleeve is screwed on the upper side of the upper bearing seat on the anchor rod body. The threaded sleeve is hermetically pressed on the bearing plate of the upper bearing seat, which can achieve pressing and sealing. Moreover, the threaded sleeve and the anchor rod body are fixedly sealed by filling sealant, further realizing the sealing between the threaded sleeve and the anchor rod body, and the overall sealing effect is good. And compared with the existing method of winding flexible sealing parts and screwing on locking nuts, this sealing structure is convenient for assembly and manufacturing, and it is easier to ensure the consistency of the sealing effect during mass production. Brief Description of the Drawings

[0016] Figure 1 Figure 1 is a schematic structural view of the first embodiment of the bag - type body - expanding anchor rod of the present utility model, without showing the structure of the anchor rod body;

[0017] Figure 2 is Figure 1 an enlarged view of the structure at position B in

[0018] Figure 3 is Figure 2 an enlarged view of the structure of the threaded sleeve in

[0019] Figure 4 is Figure 1 an enlarged view of the structure at position A in

[0020] In the figure: 1, steel reinforcement cage core; 2, grouting pipe; 20, flattened structure; 21, one - way valve; 28, sealing section; 29, glue injection port; 30, bearing plate; 31, sleeve; 32, threaded sleeve; 320, step surface; 321, small - diameter section; 33, locking nut; 310, outer convex ring; 5, bag; 8, exhaust valve. Specific embodiments

[0021] The features and performance of the present utility model will be further described in detail below in conjunction with the embodiments.

[0022] The bag - type body - expanding anchor rod of the present utility model changes the sealing structure form between the anchor rod body and the upper bearing plate in the existing anchor rod, thereby solving the problems that the existing sealing structure form has high manufacturing requirements, and it is difficult to ensure the assembly consistency during mass production, which affects the sealing effect. The overall concept of the present utility model is to fix a sealed threaded sleeve on the bearing plate of the upper bearing seat for the anchor rod body to pass through and be in threaded cooperation with the anchor rod body, and then seal - connect the threaded sleeve and the anchor rod body, so as to achieve the sealing at this position. When realizing the sealing between the threaded sleeve and the anchor rod body, the threaded sleeve and the anchor rod body are sealed with sealant, so that only sealant needs to be injected between the two. The assembly and manufacturing are more convenient, and it is easier to ensure the consistency of the sealing effect and guarantee the product quality control.

[0023] A specific embodiment taking the bag - type body - expanding anchor rod as an example is provided below.

[0024] The bag - type body - expanding anchor rod includes an anchor rod body and an anchor rod carrier, and the anchor rod carrier is a bag - type body - expanding anchor rod carrier. The anchor rod carrier is a bag - type body - expanding anchor rod carrier with an internal reinforced steel reinforcement cage, such as Figures 1-4As shown in the figure, the carrier includes two bearing seats facing each other up and down and a steel reinforcement cage core 1 connected between the two bearing seats. The "up and down" direction herein is based on the orientation of the carrier of the bladder - type expanded - body anchor rod during use. Specifically, the bearing seat includes a bearing plate 30 and a sleeve 31 fixedly connected to one side plate surface of the bearing plate 30. The sleeve 31 of the upper bearing seat is located on the lower side surface of its bearing plate 30, and the sleeve 31 of the lower bearing seat is located on the upper side surface of its bearing plate 30. A through - hole is provided in the middle of the bearing plate 30 at a position corresponding to the inside of the sleeve 31 for the anchor rod body to pass through. The anchor rod carrier further includes a bladder 5. The bladder 5 is a bladder - shaped structure with openings at both ends. The two ends of the bladder 5 are respectively connected to the sleeves 31 of the upper and lower bearing seats, and thus jointly form a sealed grouting space with the overall structure mainly composed of the two bearing seats and the central pipe. An outward - protruding ring 310 is formed on the wall of the sleeve 31 by roll - forming. The size of the bearing plate 30 is larger than the outer diameter of the sleeve 31 and extends out of the outer wall of the sleeve 31. Thus, an annular connection groove is jointly formed by the outward - protruding ring 310, the edge of the bearing plate 30, and the sleeve 31 between them. The bottom of the connection groove is covered with an elastic sealing member. The mouth of the bladder 5 is wrapped on the elastic sealing member and tightened by a hoop.

[0025] An inner grouting pipe 2 is also installed on the upper plate surface of the bearing plate 30 of the upper - side bearing seat. The inner end of the inner grouting pipe 2 extends into the grouting space. The lower end of the inner grouting pipe 2 is formed into a flattened structure 20 by being flattened, which can block the grouting pipe 2. A one - way valve 21 is also provided on the pipe wall of the inner grouting pipe 2 above the lower end. The one - way valve 21 is used to prevent the slurry from flowing back after the slurry is injected into the grouting space through the inner grouting pipe 2. Of course, in order to avoid internal pressure buildup in the grouting space when grouting into the grouting space, in this embodiment, an exhaust valve 8 is also installed on the upper plate surface of the bearing plate 30 of the upper - side bearing seat, which is used to discharge the internal gas when grouting into the grouting space.

[0026] Based on the design concept of the present utility model, a threaded sleeve 32 is provided at a position corresponding to the central hole on the upper plate surface of the bearing plate 30 of the upper bearing seat of the bladder - type expanded - body anchor rod in this embodiment. The threaded sleeve 32 allows the anchor rod body to pass through and is in threaded cooperation with the anchor rod body. During fabrication, after the anchor rod body passes through the central holes of the upper and lower bearing seats, it is first fixedly and hermetically assembled with the lower bearing seat, and then the threaded sleeve is screwed to tightly seal between the threaded sleeve 32 and the bearing plate 30 of the upper bearing seat. In addition, sealant is filled between the threaded sleeve 32 and the anchor rod body to further achieve fixed sealing between the threaded sleeve and the anchor rod body.

[0027] When achieving the seal between the threaded sleeve 32 and the anchor rod body through sealant, sealant can be applied or poured at the threaded engagement position of the two to form a sealant sealing layer at the threaded engagement position, or as in the present utility model Figures 1-2In the illustrated embodiment, by providing the threaded sleeve 32 with a sealing section 28 for enclosing a sealed annulus with the anchor rod body, the sealing section 28 is the cylindrical body part of the sleeve 31 with an inner diameter larger than that of the threaded section. When the anchor rod body is screwed through the threaded sleeve 32, an annular space, i.e., the sealed annulus, is formed between the anchor rod body and the inner wall of the sealing section 28 of the threaded sleeve 32. Filling the sealed annulus with sealant enables more convenient injection. At the same time, it ensures that the sealant between the threaded sleeve 32 and the anchor rod body is more fully filled circumferentially, resulting in a better sealing effect. The sealing section 28 can be provided at any position along the axial direction of the threaded sleeve 32, such as at both ends, in the middle, or both at the ends and in the middle. As Figures 1-2 In the illustrated embodiment, the internal threaded section of the threaded sleeve 32 is a two-piece structure with an axial gap. The cylindrical body of the sleeve 31 between the two threaded sections constitutes the sealing section 28. This enables the sealant in the sealed annulus to be blocked by the threaded sections on both axial sides, preventing it from flowing randomly and ensuring dense filling in the circumferential and radial directions. Of course, in some embodiments, the internal thread of the threaded sleeve 32 can be divided into more sections, with a sealing section 28 formed between adjacent ends.

[0028] When the sealed annulus is between adjacent internal threads at both ends, sealant can be applied to the sealed annulus before inserting the anchor rod body, or a groove extending axially and communicating with the sealed annulus can be provided on the threaded section near the mouth of the sleeve 32, and sealant can be injected into the sealed annulus through the groove. The present utility model provides a more preferred embodiment, i.e., a glue injection port 29 penetrating the wall of the sleeve 31 is provided on the sealing section 28 corresponding to the sealed annulus, and sealant is injected into the sealed annulus through the glue injection port 29. This has many advantages. First, after the sealant enters the sealed annulus from the glue injection port 29, it can flow into the sealed annulus from two circumferential directions. The injection resistance is small and the speed is fast. Moreover, both axial sides of the sealed annulus are restricted by the threaded sections, forming a relatively enclosed space. In this way, the sealant can be injected more fully, resulting in a better sealing effect. In this structure, using a quick-setting structural adhesive can further improve the manufacturing speed of the anchor rod.

[0029] In the bladder-type expanding anchor of the present utility model, the threaded sleeve can be directly pressed against the bearing plate of the upper bearing seat through the annular surface at its lower end to achieve a compression seal with the upper bearing seat. In one embodiment, as Figure 2 、 3 shown, a stepped structure is provided on the outer periphery of the lower end of the threaded sleeve. The small-diameter section 231 of the stepped structure extends into the central hole of the bearing plate of the upper bearing seat, and the step surface 230 of the stepped structure is pressed against the bearing plate of the upper bearing seat. Through such a structural design, a part of the threaded sleeve can extend into the central hole, forming an L-shaped annular mating surface between the threaded sleeve and the bearing plate of the upper bearing seat, resulting in a better sealing effect.

[0030] Some of the above embodiments can achieve reliable sealing between the upper bearing plate 30 and the anchor rod body. On this basis, the following provides some more excellent embodiments to better ensure reliable sealing between the lower bearing plate 30 and the anchor rod body at the same time. As Figure 4 shown.

[0031] A locking nut 33 for locking the lower end of the anchor rod body is integrally connected to the lower side surface of the lower bearing seat. Moreover, the locking nut 33 is a cylindrical structure with one end open and one end closed, and the open end of the locking nut 33 is hermetically connected to the lower bearing seat. With such a setting, the threaded connection part between the locking nut and the anchor rod body is not exposed to the external environment, and the problem that the threaded connection position between the anchor rod body and the locking nut is prone to rust can be avoided.

[0032] Specifically, in different embodiments, the sealing connection form between the locking nut 33 and the lower bearing seat can be different. For example Figure 4 in the embodiment shown, the bearing plate 30 of the lower bearing seat and the locking nut 33 are integrally formed by stamping. With such a setting, the outer surface has high integrity and is not easy to rust. Or in another embodiment, the bearing plate 30 of the lower bearing seat and the locking nut 33 are welded and sealed. This way has a lower processing cost.

[0033] The above embodiments list the bag-type expanded anchor rod with an internal reinforced steel cage core 1. In other embodiments, it can be an ordinary bag-type expanded anchor rod. For example, there is no reinforced steel cage core 1 between the upper and lower bearing seats, but a central pipe is provided between the upper and lower bearing seats. The two ends of the central pipe are corresponding to the central holes on the bearing plate 30 and are for the anchor rod body to pass through.

[0034] In the above-listed various embodiments, the anchor rod body can be a long screw rod or a deformed steel bar. It is preferably a deformed steel bar. In this case, the thread on its outer circumference is a trapezoidal thread. When the locking sleeve is in threaded fit with it, there is a certain gap between the internal and external threads. To a certain extent, the sealant can not only fill the sealing annulus but also extend to the threaded section to a certain extent, improving the reliability of the fixation and sealing between the locking sleeve and the anchor rod body.

[0035] When assembling the bag-type expanded anchor rod of the present invention, the lower end of the anchor rod body is sequentially screwed through the threaded sleeve 32 on the upper bearing seat and the locking nut of the lower bearing seat, and then sealant is injected into the sealing annulus through the glue injection port 29. Wait for the sealant to solidify to seal between the anchor rod body and the threaded sleeve 32. Overall, the manufacturing and assembly are relatively convenient, and filling the sealing annulus with sealant can ensure good sealing, which is convenient for quality control.

[0036] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. The patent protection scope of the present utility model shall be subject to the claims. Any equivalent structural changes made by using the content of the specification and drawings of the present utility model shall similarly be included within the protection scope of the present utility model.

Claims

1. A bag-type expanded anchor rod, characterized in that it includes The upper and lower bearing seats and the anchor rod body are arranged opposite to each other, and the bearing plates of the upper and lower bearing seats respectively have central holes for the anchor rod body to pass through. The anchor rod body and the lower bearing seat are fixedly and sealedly assembled. A threaded sleeve is screwed on the upper side of the upper bearing seat on the anchor rod body, and the threaded sleeve is sealed and pressed against the bearing plate of the upper bearing seat. The threaded sleeve and the anchor rod body are fixedly and sealed by filling sealant.

2. The bag-type expanded anchor rod according to claim 1, characterized in that: The threaded sleeve has a sealing section for forming a sealing annulus with the anchor rod body, and the sealing annulus is filled with sealant.

3. The bag-type expanded anchor rod according to claim 2, characterized in that: The internal thread section of the threaded sleeve is an axially spaced segmented structure, and the sleeve body between two adjacent thread sections constitutes the sealing section.

4. The bag-type expanded anchor rod according to claim 2, characterized in that: A glue injection port penetrating through the cylinder wall is arranged on the cylinder wall of the threaded sleeve at a position corresponding to the sealing annulus.

5. The bag-type expanded anchor rod according to claim 2, characterized in that: The sealing annulus is located in the middle region of the threaded sleeve.

6. The bag-type expandable anchor rod according to any one of claims 1 to 5, characterized in that: A step structure is arranged on the outer periphery of the lower end of the threaded sleeve, the small diameter section of the step structure extends into the central hole of the bearing plate of the upper bearing seat, and the step surface of the step structure is pressed tightly on the bearing plate of the upper bearing seat.

7. The bag-type expandable anchor rod according to any one of claims 1 to 5, characterized in that: A locking nut for locking the anchor rod body is integrally connected to the lower side surface of the lower bearing seat. The locking nut is a cylindrical structure with one end open and the other end closed. The open end of the locking nut is sealingly connected to the lower bearing seat.

8. The bag-type expanded anchor rod according to claim 7, characterized in that: The bearing plate of the lower bearing seat and the locking nut are an integrated stamping part.

9. The bag-type expandable anchor rod according to any one of claims 1 to 5, characterized in that: The sealant is a quick-acting gel.

10. The bag-type expandable anchor rod according to any one of claims 1 to 5, characterized in that: The anchor rod body is threaded steel.

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