CN210622828U - Hollow anchor rod grouting joint - Google Patents
Hollow anchor rod grouting joint Download PDFInfo
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- CN210622828U CN210622828U CN201921571397.4U CN201921571397U CN210622828U CN 210622828 U CN210622828 U CN 210622828U CN 201921571397 U CN201921571397 U CN 201921571397U CN 210622828 U CN210622828 U CN 210622828U
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Abstract
The utility model discloses a cavity stock slip casting connects, including interior sleeve pipe and outer tube, the interval is provided with spacing step and slip casting pipe ligature groove around on the interior sheathed tube outer wall, divide into screw thread section, unthreaded hole section and throat section around the inner wall of outer tube in proper order, the screw thread section is used for closing soon fixedly with the end screw thread of cavity stock, and the diameter of unthreaded hole section is greater than the diameter of screw thread section, throat section, the outer tube cover is on interior sleeve pipe, and spacing step can slide in the unthreaded hole section, realizes the relative interior sheathed tube back-and-forth movement of outer tube, interior sheathed tube front end is provided with the cone, and the internal diameter of cavity stock is between the internal diameter and the external diameter of cone for the cone can realize butt joint sealing in inserting the cavity stock partially. The grouting joint better embodies the characteristics of simple operation, practicality, cost saving, safety and reliability, can prevent the joint from leaking slurry, ensures full grouting and avoids pipe blockage and pipe explosion.
Description
Technical Field
The utility model belongs to the technical field of the tunnel construction, concretely relates to slip casting joint that uses when carrying out the slip casting to tunnel cavity stock.
Background
The hollow anchor rod is widely used in tunnel construction, for example, the main chamber anchor rod adopts a common hollow anchor rod with the specification of phi 28 x 5.5mm and the length of 6 m. The quality key of the hollow anchor rod lies in anchor rod grouting, the plumpness of grouting directly influences whether the anchor rod installation is qualified, and the full grouting is based on the judgment of anchor rod hole wall reverse grouting. The grouting pipe and the hollow anchor rod are connected through the grouting connector, and the connecting part where the grouting connector is located plays a key role in the grouting process.
Fig. 4 shows a grouting joint commonly used in a grouting process of a cave depot anchor rod, which consists of a connecting pipe bolt 5 and an auxiliary connecting pipe 6. The anterior segment of taking over bolt 5 is provided with the internal thread and is used for screwing with the external thread of cavity stock 3 and is connected, and the back end of taking over bolt 5 is provided with the external thread and is used for screwing with the internal thread of auxiliary connection 6 anterior segments and is connected, is provided with a plurality of annular grooves on the outer wall of auxiliary connection 6 back end, and slip casting pipe 4 cover is fixed on annular groove section and ligature, and the cross section of annular groove can prevent the slip casting pipe 4 after the ligature to withdraw from for the pawl. Two operating rods 5a are welded on the outer wall of the connecting pipe bolt 5. The hollow anchor rod 3 is used for taking down the hollow anchor rod 3 and the grouting pipe 4 at each time, and is equivalent to two interfaces except for a binding part, so that the grouting process is serious in slurry leakage, and the reverse grouting effect is not good.
The main problems with this structure are illustrated in four ways:
1. operability of
When the grouting joint is screwed in or out from the hollow anchor rod, in order to prevent the grouting pipe from knotting along with the rotation, the grouting joint and the grouting pipe need to be separated and then bound before the grouting of the next hollow anchor rod, so that the grouting is very troublesome. And the slip casting joint does not have corresponding interface with the cavity stock, and it is great to reserve the gap, and the interface is many, hardly forms a closed whole, and slip casting must be held the action bars by hand by people each time, and the operation is more complicated in the whole use.
2. Practicality of use
The leakage of the grout at the two interfaces is serious in the grouting process, so that the grout return effect in the hollow anchor rod hole is not good during grouting, and the grouting is not full; slurry leakage also results in too much slurry on the operation platform, which is not beneficial to the operation and cleaning of the equipment, and if the slurry is stirred according to the designed mixing proportion, the condition of pipe blockage often exists, which results in time and labor waste.
3. Economy of use
The cement consumption is increased due to serious slurry leakage in the grouting process, 2-3 bagged cement bags of 6m hollow anchor rods can be actually grouted on site by 50kg, and the loss in the length of each bag is large (the ratio of water to cement is 0.45: 1).
4. Safety feature
The grouting joint needs to be held by an operator, a grouting machine has certain pressure in the grouting process, the joint is not butted in place, the auxiliary connecting pipe is easily blocked, the grouting pressure and the air in the pipe are too large, pipe explosion is easily caused, certain potential safety hazards are caused to the operator, and certain damage is caused to equipment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an economy, practicality, security are high, convenient operation's cavity stock slip casting connects, can prevent to connect the hourglass thick liquid, ensure that the slip casting is full, avoid stifled pipe, blast pipe.
Therefore, the utility model discloses the technical scheme who adopts does: the utility model provides a cavity stock slip casting connects, includes interior sleeve pipe and outer tube, the interval is provided with spacing step and slip casting pipe ligature groove around on the interior sheathed tube outer wall, divide into screw thread section, unthreaded hole section and throat section around the inner wall of outer tube in proper order, the screw thread section is used for closing soon fixedly with the end screw thread of cavity stock, and the diameter of unthreaded hole section is greater than the diameter of screw thread section, throat section, the outer tube cover is on interior sleeve pipe, and spacing step can slide in the unthreaded hole section, realizes the relative interior sheathed tube back-and-forth movement of outer tube, interior sheathed tube front end is provided with the cone, and the internal diameter of cavity stock is between the internal diameter and the external diameter of cone for the cone can realize butt joint sealing in the local insertion.
Preferably, the outer sleeve is formed by welding a front section and a rear section, and the welding surface just forms the front end surface of the unthreaded hole section. Adopt two segmentation welded structure, convenient processing manufacturing sets up the initial position department at the unthreaded hole section with the face of weld, is closer to the middle part of outer tube, can guarantee the outer tube bulk strength after the welding.
Preferably, the left side and the right side of the outer wall of the outer sleeve are welded with holding separation blades oppositely, and the welding seams of the holding separation blades are vertically intersected with the welding seams of the front section and the rear section of the outer sleeve. The gripping baffle is additionally arranged, so that an operator can screw the grouting joint under the condition of wearing rubber gloves; the welding seam of the holding separation blade spans the front section and the rear section of the outer sleeve, so that the integral strength can be ensured.
Has the advantages that: the grouting joint is simple and practical in operation, saves cost, is safe and reliable, and is embodied in the following aspects:
1. operability of
The grouting joint is an integral body, the front end of the joint is connected with the reserved end of the hollow anchor rod through threads, the rear end of the joint is bound and fixed with the grouting pipe, the outer sleeve can rotate 360 degrees relative to the inner sleeve, the outer sleeve can rotate freely and is tightly buckled with the hollow anchor rod according to actual conditions after being connected with the hollow anchor rod, the outer sleeve, the hollow anchor rod and the hollow anchor rod form a closed movable integral body, the conical head of the inner sleeve is inserted into the hollow anchor rod to realize butt joint during installation, the outer sleeve is pushed forwards relative to the inner sleeve, the thread section of the outer sleeve is exposed and is screwed and fixed with the end thread of the hollow anchor rod through the thread section, the grouting pipe is bound on the grouting pipe binding groove of the inner sleeve, the first grouting can be carried out, the fact that the grouting pipe is knotted during the rotation of the outer sleeve is avoided, and the grouting pipe does not need to be taken down, the operation is simpler.
2. Practicality of use
Be provided with the cone with interior sheathed tube front end, the internal diameter of cavity stock is between the internal diameter and the external diameter of cone for the cone can realize in the local insertion cavity stock butt joint sealed, does benefit to and presses into thick liquid to the hole of cavity stock, and the leakproofness is stronger, and the slip casting in-process connects can not leak thick liquid, has ensured the plumpness of slip casting, and the workman can obviously judge out the anti-thick liquid time of stock. The grouting completion time of one hole is shortened by about half compared with the grouting completion time of the previous hole (about 50 seconds are needed for improving the previous hole, and about 30 seconds are needed after improvement).
3. Economy of use
The grouting joint has good tightness, grout cannot be omitted easily, 4-5 bolts can be injected by 50kg of bagged cement with 6 meters of anchor rods, the bagged cement can be saved by about 6kg of anchor rods compared with each 6 meters of anchor rods before improvement, 1kg (0.56 yuan) of bagged cement is saved every linear meter, cost is saved, and a grouting effect is achieved.
4. Safety feature
After the improvement, personnel need not to hold up the slip casting joint, slip casting joint and slip casting pipe at first form a whole, because of interior sheathed tube cone head diameter is great, directly dock with cavity stock hole, the screw thread section through the outer tube of activity again overlaps with the mesopore stock mutually, air in the slip casting joint directly flows out through cavity stock outer wall again along cavity stock hole under the pressure of thick liquid during the slip casting, until the thick liquid is full to form the anti-thick liquid, effectively avoided leaking thick liquid, stifled pipe and explosion, potential safety hazard and the influence to equipment have been reduced.
In conclusion, the grouting joint better embodies the characteristics of simple operation, practicality, cost saving, safety and reliability, can prevent the joint from leaking slurry, ensures full grouting and avoids pipe blockage and pipe explosion.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a sectional view a-a of fig. 1.
Fig. 3 is a perspective view of the present invention.
Fig. 4 is a diagram showing a state of use of a conventional slip casting joint.
Detailed Description
The invention will be further described by way of examples with reference to the accompanying drawings:
referring to fig. 1-3, a hollow anchor rod grouting joint mainly comprises an inner sleeve 1 and an outer sleeve 2.
The outer wall of the inner sleeve 1 is provided with a limiting step 1a and a grouting pipe binding groove 1b at intervals in the front and back.
The inner wall of the outer sleeve 2 is sequentially divided into a threaded section 2a, a unthreaded hole section 2b and a necking section 2 c. The thread section 2a is used for being screwed and fixed with the end thread of the hollow anchor rod, and the end thread of the hollow anchor rod is an external thread. The diameter of the unthreaded hole section 2b is larger than the diameters of the threaded section 2a and the necking section 2c, the outer sleeve 2 is sleeved on the inner sleeve 1, and the limiting step 1a can slide in the unthreaded hole section 2b, so that the outer sleeve 2 can move back and forth relative to the inner sleeve 1. The amount of forward and backward movement of the outer sleeve 2 relative to the inner sleeve 1 is determined by the length of the unthreaded hole section 2b, and is designed according to the end head threaded section of the hollow anchor rod.
The front end of the inner sleeve 1 is provided with a conical head 1c, and the inner diameter of the hollow anchor rod is between the inner diameter and the outer diameter of the conical head 1c, so that the conical head 1c can be partially inserted into the hollow anchor rod to realize butt sealing.
Preferably, the outer sleeve 2 is formed by welding a front section and a rear section, and the welding surface just forms the front end surface of the unthreaded hole section 2b, so that the welding surface is closer to the middle of the outer sleeve 2.
In addition, the left side and the right side of the outer wall of the outer sleeve 2 are oppositely welded with holding separation blades 2d, the welding seams of the holding separation blades 2d are vertically intersected with the welding seams of the front section and the rear section of the outer sleeve 2, so that the front section of each holding separation blade 2d is welded on the front section of the outer sleeve 2, and the rear section of each holding separation blade 2d is welded on the rear section of the outer sleeve 2.
Claims (2)
1. The utility model provides a cavity stock slip casting connects which characterized in that: the anchor rod comprises an inner sleeve (1) and an outer sleeve (2), wherein a limiting step (1a) and a grouting pipe binding groove (1b) are arranged on the outer wall of the inner sleeve (1) at a front-back interval, the inner wall of the outer sleeve (2) is divided into a threaded section (2a), a smooth hole section (2b) and a reducing section (2c) in sequence from front to back, the threaded section (2a) is used for being screwed and fixed with the end thread of a hollow anchor rod, the diameter of the smooth hole section (2b) is larger than that of the threaded section (2a) and the reducing section (2c), the outer sleeve (2) is sleeved on the inner sleeve (1), the limiting step (1a) can slide in the smooth hole section (2b) to realize the front-back movement of the outer sleeve (2) relative to the inner sleeve (1), a conical head (1c) is arranged at the front end of the inner sleeve (1), and the inner diameter of the, so that the conical head (1c) can be partially inserted into the hollow anchor rod to realize butt sealing; the outer sleeve (2) is formed by welding a front section and a rear section, and the welding surface just forms the front end surface of the unthreaded hole section (2 b).
2. A hollow anchor slip casting joint as defined in claim 1, wherein: the left side and the right side of the outer wall of the outer sleeve (2) are welded with holding separation blades (2d) relatively, and the welding seams of the holding separation blades (2d) are vertically intersected with the welding seams of the front section and the rear section of the outer sleeve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921571397.4U CN210622828U (en) | 2019-09-20 | 2019-09-20 | Hollow anchor rod grouting joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921571397.4U CN210622828U (en) | 2019-09-20 | 2019-09-20 | Hollow anchor rod grouting joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210622828U true CN210622828U (en) | 2020-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921571397.4U Active CN210622828U (en) | 2019-09-20 | 2019-09-20 | Hollow anchor rod grouting joint |
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| CN (1) | CN210622828U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500126A (en) * | 2019-09-20 | 2019-11-26 | 中铁隧道集团一处有限公司 | Hollow bolt filling adaptor and hollow bolt construction technology |
-
2019
- 2019-09-20 CN CN201921571397.4U patent/CN210622828U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500126A (en) * | 2019-09-20 | 2019-11-26 | 中铁隧道集团一处有限公司 | Hollow bolt filling adaptor and hollow bolt construction technology |
| CN110500126B (en) * | 2019-09-20 | 2024-03-15 | 中铁隧道集团一处有限公司 | Grouting joint for hollow anchor rod and construction process for hollow anchor rod |
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