A small catheter connection structure

Abstract

The utility model discloses a kind of ahead small catheter connecting structures, including ahead small catheter, ahead small catheter includes the taper section, grouting section and stop grout section sequentially arranged from front to back, the side wall on the one end of pipe orifice on stop grout section is obliquely provided with grouting nozzle communicated with it, grouting nozzle pipe orifice is provided with valve, another end of valve is connected with grouting pipe by combination connecting piece, combination connecting piece includes communicating pipe, sleeve and fastening hoop.The utility model is connected with valve by communicating pipe and is screwed, sleeve is provided with fastening hoop, forms double-layer pipe and fastening, limit plate and limit slot are clamped, and stability is enhanced, prevent slurry leakage, this structure can withstand slurry pressure when grouting, ensure that connection is tight, avoid loosening, guarantee construction progress and grouting quality, solve only enough firmness that it is connected by lashing, slurry pressure causes connecting head and grouting pipe loosening, affect construction progress and grouting quality problem.

Description

Technical Field

[0001] This utility model relates to, but is not limited to, the field of advanced small catheter device technology, and more specifically, to an advanced small catheter connection structure. Background Technology

[0002] During the excavation of underground caverns, grouting is required through pre-inserted small guide pipes to ensure the stability of the surrounding rock. In conventional methods, the grouting pipe is often directly inserted into the pre-inserted small guide pipe, with the pipe opening temporarily sealed with cotton yarn. However, this method suffers from low pressure resistance and is prone to grout leakage, making it difficult to achieve the desired grouting effect. Some methods use anchoring agents or sealant to temporarily seal and fix the pre-inserted small guide pipe opening to the grouting pipe. However, anchoring agents require time to reach a certain strength, affecting the construction period, while sealant, although it can harden and increase strength quickly, is for single use only, resulting in material waste and environmental pollution.

[0003] A search revealed Chinese Patent Publication No. CN221990371U, which discloses an advanced small-diameter grouting connection device. The ball valve connected to the grouting nozzle facilitates the control of the flow of grout. The connector on the ball valve and the grouting pipe are easy to disassemble, can be reused multiple times, and are environmentally friendly and economical.

[0004] To address the aforementioned existing technology, the connector is connected to the grouting pipe via binding wire. However, this wire connection alone is not secure enough. During grouting, grout pressure can cause the connector to loosen or even detach from the grouting pipe, leading to grouting interruptions and other malfunctions, thus affecting construction progress and grouting quality. Therefore, a pre-connected small guide pipe structure with a secure connection to the grouting pipe is designed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide an advanced small catheter connection structure.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] This utility model discloses an advanced small guide tube connection structure, including an advanced small guide tube, which includes a tapered section, a grouting section and a grout-stopping section arranged sequentially from front to back. A grouting nozzle is inclinedly arranged on the side wall near the end of the grouting section and communicates with it. A valve is provided at the opening of the grouting nozzle. The other end of the valve is connected to a grouting pipe through a combined connector. The combined connector includes a connecting pipe, a sleeve and a fastening clamp.

[0008] Preferably, the connecting pipe is threadedly fitted to the valve, the sleeve is fitted on the outside of the connecting pipe, and the fastening clamp is fitted on the outside of the sleeve.

[0009] Preferably, the upper end of the sleeve is threaded to the lower end of the connecting pipe, and a limiting plate is provided on the outer side of the sleeve, with the lower end of the limiting plate fixedly connected to the sleeve.

[0010] Preferably, there is a gap between the outer side of the sleeve and the limiting plate, which is an expansion joint, and the upper end of the limiting plate is movably connected to the sleeve through the expansion joint.

[0011] Preferably, the front side of the limiting plate is designed with an inclined surface, and the inner side of the fastening hoop is provided with a limiting groove that is adapted to the limiting plate. The limiting plate is engaged with the fastening hoop through the limiting groove.

[0012] Preferably, the sleeve is made of either nitrile rubber or silicone rubber.

[0013] Preferably, a plurality of fastening blocks are fixed on the inner wall of the lower end of the sleeve, the plurality of fastening blocks are arranged in a circumferential array, the fastening blocks are arc-shaped, and the fastening blocks are made of rubber.

[0014] Preferably, the fastening hoop has a "C" shaped design, with a bolt passing through the opening of the fastening hoop, and an anti-slip rubber pad fixed on the inner wall of the fastening hoop.

[0015] Preferably, the inlet end of the advanced small conduit is provided with a temporary sealing element, the temporary sealing element including a plug and a pull rod, the plug being threadedly engaged with the advanced small conduit, and the pull rod being disposed at the other end of the temporary sealing element.

[0016] Preferably, a sealing ring is fixed to the inner thread of the plug, a connecting block is provided between the plug and the pull rod, the connecting block is fixed to the inner side of the plug, and the pull rod is screwed to the connecting block.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This utility model adopts a connecting pipe and valve threaded connection, with a fastening clamp on the outside of the sleeve to form a double-layer pipe and fasten it. The limiting plate and the limiting groove are snapped together to enhance stability and prevent grout leakage. This structure can withstand the grout pressure during grouting, ensuring a tight connection and avoiding loosening. It guarantees the construction progress and grouting quality, and solves the problem that the wire connection alone is not strong enough, and the grout pressure causes the connector and grouting pipe to loosen, affecting the construction progress and grouting quality.

[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a partial structural schematic diagram of the present invention;

[0024] Figure 3 This is a partial structural schematic diagram of the present invention;

[0025] Figure 4 This is a partial structural schematic diagram of the present invention;

[0026] Figure 5 This is a partial structural schematic diagram of the present invention;

[0027] In the diagram: 1. Pre-drilled small guide tube; 11. Grouting stop section; 12. Grouting section; 13. Conical section;

[0028] 2. Grouting nozzle;

[0029] 3. Valves;

[0030] 4. Combined connectors; 41. Connecting pipe; 42. Sleeve; 421. Fastening block; 422. Limiting plate; 423. Movable joint; 43. Fastening clamp; 431. Limiting groove; 432. Bolt;

[0031] 5. Grouting pipe;

[0032] 6. Temporary sealing component; 61. Plug; 62. Sealing ring; 63. Tie rod; 64. Mounting block. Detailed Implementation

[0033] like Figure 1-5 As shown, this utility model provides an advanced small guide tube connection structure, including an advanced small guide tube 1. The advanced small guide tube 1 includes a tapered section 13, a grouting section 12 and a grout-stopping section 11 arranged sequentially from front to back. A grouting nozzle 2 is inclinedly arranged on the side wall near the end of the grouting nozzle 11 and communicates with it. A valve 3 is provided at the opening of the grouting nozzle 2. The other end of the valve 3 is connected to a grouting pipe 5 through a combined connector 4. The combined connector 4 includes a connecting pipe 41, a sleeve 42 and a fastening clamp 43.

[0034] Furthermore, in this embodiment, the connecting pipe 41 is threadedly engaged with the valve 3, the sleeve 42 is sleeved on the outside of the connecting pipe 41, and the fastening clamp 43 is sleeved on the outside of the sleeve 42. The sleeve 42 and the connecting pipe 41 form a double-layer pipe structure, which is fastened by the fastening clamp 43 on the outside.

[0035] In this embodiment, the upper end near the sleeve 42 is threadedly engaged with the lower end of the connecting pipe 41. The sleeve 42 and the connecting pipe 41 are assembled by the threaded engagement. The connecting pipe 41 extends into the sleeve 42. Care should be taken to avoid the connection part between the connecting pipe 41 and the sleeve 42 being too short, which would cause the connection part to be unstable. A limiting plate 422 is provided on the outside of the sleeve 42. The lower end of the limiting plate 422 is fixedly connected to the sleeve 42. The lower end of the limiting plate 422 is fixed by the sleeve 42 and is integrally formed with the sleeve 42.

[0036] In this embodiment, there is a gap between the outer side of the sleeve 42 and the limiting plate 422. This gap is an expansion joint. The upper end of the limiting plate 422 is movably connected to the sleeve 42 through the expansion joint. The expansion joint allows the limiting plate 422 to move on the sleeve 42 except for the fixed lower end position.

[0037] In this embodiment, the front side of the limiting plate 422 is designed with a slope, and the inner side of the fastening hoop 43 is provided with a limiting groove 431 that is adapted to the limiting plate 422. The limiting plate 422 is engaged with the fastening hoop 43 through the limiting groove 431. When the fastening hoop 43 is fastening the sleeve 42, the limiting plate 422 and the limiting groove 431 are aligned and engaged.

[0038] In this embodiment, the sleeve 42 is made of either nitrile rubber or silicone rubber. The sleeve 42 is made of the same material as the limiting plate 422, so that when the fastening clamp 43 is tightened, the sleeve 42 will undergo a certain elastic deformation, thereby tightening the connecting pipe 41 and the grouting pipe 5 inserted into the sleeve 42.

[0039] In addition, the conventional grouting pipe 5 is a flexible hose. Considering that the need for compression and tightening will cause deformation of the hose, after the grouting pipe 5 is inserted into the sleeve 42, it continues to penetrate into the connecting pipe 41, forming a fastening clamp 43-sleeve 42-connecting pipe 41-grouting pipe 5 from the outside to the inside. The size of the connection part between the grouting pipe 5 and the connecting pipe 41 is adapted so that the grout can directly enter the connecting pipe 41 through the grouting pipe 5 and then enter the valve 3. This structural design prevents the grout from leaking into the sleeve 42.

[0040] In this embodiment, a plurality of fastening blocks 421 are fixed on the inner wall of the lower end of the sleeve 42. The plurality of fastening blocks 421 are arranged in a circumferential array. The fastening blocks 421 are arc-shaped and made of rubber. The rubber fastening blocks 421 prevent the grouting pipe 5 from slipping inside the sleeve 42.

[0041] In this embodiment, the fastening clamp 43 is designed in a "C" shape. A bolt 432 passes through the opening of the fastening clamp 43, and an anti-slip rubber pad is fixed on the inner wall of the fastening clamp 43. The tightening and loosening of the fastening clamp 43 is controlled by rotating the bolt 432. The anti-slip rubber pad prevents the fastening clamp 43 from slipping outside the sleeve 42.

[0042] In this embodiment, a temporary sealing element 6 is provided at the inlet end of the advanced small conduit 1. The temporary sealing element 6 includes a plug 61 and a pull rod 63. The plug 61 is threadedly engaged with the advanced small conduit 1, and the pull rod 63 is provided at the other end of the temporary sealing element 6. The rotation of the plug 61 at the inlet end of the advanced small conduit 1 is controlled by the locking hole.

[0043] In this embodiment, a sealing ring 62 is fixed to the inner side of the thread of the plug 61. The sealing rings 62 are spaced apart, such as the first thread, the second thread with the sealing ring 62, the third thread, etc. The sealing rings 62 set at the thread enhance the sealing performance of the plug 61 to the inlet end of the advanced small guide tube 1. A connecting block is provided between the plug 61 and the pull rod 63. The connecting block is fixed to the inner side of the plug 61, and the pull rod 63 is screwed to the connecting block. The connecting block facilitates the disassembly and assembly of the pull rod 63.

[0044] Specifically, both the pre-conduit pipe 1 and the connecting pipe 41 are made of conventional building steel. The temporary sealing piece 6 is used to block the inlet end of the pre-conduit pipe 1. By rotating the plug 61 clockwise, it is gradually screwed into the inlet end of the pre-conduit pipe 1. During rotation, ensure that the sealing ring 62 is correctly installed inside the thread of the plug 61 and that the spacing is reasonable to enhance sealing. Insert one end of the grouting pipe 5 into the combined connector 4, adjust the position of the grouting pipe 5 to ensure that the grout can flow smoothly from the grouting pipe 5 into the connecting pipe 41 and into the valve 3. Fit the fastening clamp 43 onto the outside of the sleeve 42, and secure it with bolts 4. 32 Rotate to control the tightening of the fastening clamp 43, so that the fastening clamp 43 tightens the sleeve 42. During the tightening process, the limiting plate 422 and the limiting groove 431 on the inner side of the fastening clamp 43 are engaged to ensure the stability and reliability of the connection. At the same time, the elastic deformation of the sleeve 42 will tighten the inserted connecting pipe 41 and the grouting pipe 5 to a certain extent to ensure the tightness of the connection. The connecting pipe 41 is threaded to the valve 3 to ensure a tight connection. The valve 3 connected to the combined connector 4 is connected to the grouting nozzle 2 to ensure a firm and reliable connection. The valve 3 can normally control the flow and opening and closing of the grout.

[0045] Grouting operation of the pre-grouting small guide tube 1: Before starting grouting, open valve 3 on grouting nozzle 2 to allow grout to flow smoothly from grouting pipe 5 into pre-grouting small guide tube 1. The grout is delivered to grouting pipe 5 through grouting equipment. The grout passes through grouting pipe 5, connecting pipe 41, and valve 3 in sequence, and finally enters grouting section 12 of pre-grouting small guide tube 1 to complete the grouting operation. During the grouting process, closely observe parameters such as grouting pressure and grouting volume to ensure that the grouting effect meets the design requirements. After grouting is completed, close valve 3 on grouting nozzle 2 in time to prevent grout backflow. Remove temporary sealing part 6 from the inlet end of pre-grouting small guide tube 1 using pull rod 63 for subsequent construction operations. Clean the entire pre-grouting small guide tube connection structure to remove residual grout and impurities. Check the wear of each component. If necessary, replace or repair it in time to ensure that the device can be used normally again.

[0046] It should be noted that during actual construction, except for machine failures that cause a sudden increase in grouting pressure, leading to the detachment of the connection structure, such sudden situations are unavoidable. This application applies to normal situations. When adjusting the grouting pressure at a constant speed or manually, the tightness of the connection structure itself can be manually adjusted to adapt to different grouting pressures.

[0047] The components of this utility model, such as the advanced small guide tube 1, grouting nozzle 2, valve 3, connecting pipe 41, sleeve 42, fastening block 421, limiting plate 422, fastening clamp 43, screw, grouting pipe 5, temporary sealing component 6, plug 61, sealing ring 62, tie rod 63, and mounting block 64, are all general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0048] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pre-conduit connection structure, comprising a pre-conduit (1), the pre-conduit (1) comprising a tapered section (13), a grouting section (12), and a grout-stopping section (11) arranged sequentially from front to back, characterized in that, On the side wall near the pipe opening of the grout-stopping section (11), there is an inclined grouting nozzle (2) communicating with it. The grouting nozzle (2) is equipped with a valve (3). The other end of the valve (3) is connected to the grouting pipe (5) through a combination connector (4). The combination connector (4) includes a connecting pipe (41), a sleeve (42), and a fastening clamp (43).

2. The advanced small catheter connection structure according to claim 1, characterized in that, The connecting pipe (41) is threadedly engaged with the valve (3), the sleeve (42) is fitted on the outside of the connecting pipe (41), and the fastening clamp (43) is fitted on the outside of the sleeve (42).

3. The advanced small catheter connection structure according to claim 2, characterized in that, The upper end of the sleeve (42) is threadedly engaged with the lower end of the connecting pipe (41), and a limiting plate (422) is provided on the outer side of the sleeve (42), with the lower end of the limiting plate (422) fixedly connected to the sleeve (42).

4. The advanced small catheter connection structure according to claim 3, characterized in that, There is a gap between the outer side of the sleeve (42) and the limiting plate (422), which is an expansion joint. The upper end of the limiting plate (422) is movably connected to the sleeve (42) through the expansion joint.

5. The advanced small catheter connection structure according to claim 4, characterized in that, The front side of the limiting plate (422) is designed with a slope, and the inner side of the fastening hoop (43) is provided with a limiting groove (431) that is adapted to the limiting plate (422). The limiting plate (422) is engaged with the fastening hoop (43) through the limiting groove (431).

6. The advanced small catheter connection structure according to claim 5, characterized in that, The sleeve (42) is made of either nitrile rubber or silicone rubber.

7. The advanced small catheter connection structure according to claim 6, characterized in that, A plurality of fastening blocks (421) are fixed on the inner wall of the lower end of the sleeve (42). The plurality of fastening blocks (421) are arranged in a circular array. The fastening blocks (421) are arc-shaped and made of rubber.

8. The advanced small catheter connection structure according to claim 7, characterized in that, The fastening hoop (43) is designed in a "C" shape. A bolt (432) passes through the opening of the fastening hoop (43), and an anti-slip rubber pad is fixed on the inner wall of the fastening hoop (43).

9. The advanced small catheter connection structure according to claim 1, characterized in that, The inlet end of the advanced small conduit (1) is provided with a temporary sealing element (6). The temporary sealing element (6) includes a plug (61) and a pull rod (63). The plug (61) is threadedly engaged with the advanced small conduit (1), and the pull rod (63) is located at the other end of the temporary sealing element (6).

10. The advanced small catheter connection structure according to claim 9, characterized in that, A sealing ring (62) is fixed to the inner thread of the plug (61). A connecting block is provided between the plug (61) and the pull rod (63). The connecting block is fixed to the inner side of the plug (61). The pull rod (63) is screwed to the connecting block.

Images