A grouting device

Abstract

The utility model discloses a kind of slurry outlet devices for grouting, including into pulp pipe, tensioning assembly and self-sealing device, the tensioning assembly is installed in the outside of the into pulp pipe, so that into pulp pipe is inserted into grouting hole, by the expansion of tensioning assembly, the sealing is formed at the position close to orifice of grouting hole, while fixing the into pulp pipe, the self-sealing device is coaxially installed in the into pulp pipe, when stopping grouting, the self-sealing device forms sealing to the lower end of into pulp pipe, the connecting pipe for connecting grouting hose is arranged at the position close to top of into pulp pipe side wall;The device is reasonable in structure, reliable in sealing, convenient to operate.

Description

Technical Field

[0001] This utility model relates to a grout outlet device for grouting. Background Technology

[0002] Grouting is a commonly used reinforcement method in engineering projects such as building foundation reinforcement and tunnel surrounding rock support. Its core principle is to inject grout under high pressure into ground fissures or pores through grouting pipes. After the grout solidifies, it forms a reinforced body, improving ground stability. However, existing grouting pipes have the following technical defects in use:

[0003] Poor sealing effect at the orifice: After the grouting pipe is inserted into the grouting hole, a gap is easily generated between the orifice and the outer wall of the grouting pipe. During high-pressure grouting, the grout is easy to overflow from the gap, resulting in material waste and construction environment pollution. At the same time, it affects the stability of grouting pressure and reduces the reinforcement effect.

[0004] The grouting pipe is not securely fixed: During the grouting process, the grouting pipe is prone to displacement due to the impact of grout or external disturbances, resulting in deviation of the grouting position, poor stability, and easy detachment of the grouting pipe.

[0005] Based on the above problems, we designed a grout discharge device for grouting that is structurally reasonable, reliably sealed, and easy to operate. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a grout discharge device for grouting that has a reasonable structure, reliable sealing, and convenient operation.

[0007] To solve the above problems, the present invention adopts the following technical solution:

[0008] A grouting device includes a grout inlet pipe, a tensioning assembly, and a self-sealing device. The tensioning assembly is installed outside the grout inlet pipe so that when the grout inlet pipe is inserted into a grouting hole, the expansion of the tensioning assembly forms a seal near the hole opening, thereby fixing the grout inlet pipe. The self-sealing device is coaxially installed inside the grout inlet pipe. When grouting stops, the self-sealing device seals the lower end of the grout inlet pipe. A connecting pipe for connecting a grouting hose is provided near the top of the side wall of the grout inlet pipe.

[0009] Preferably, an annular groove is provided at the lower middle part of the outer wall of the grout inlet pipe, and a retaining ring is provided at the lower edge of the groove on the outer wall of the grout inlet pipe. The tensioning assembly includes an expansion sleeve and a threaded pressure plate. The expansion sleeve is made of elastic rubber and fits into the groove with an interference fit. The threaded pressure plate is threaded into the grout inlet pipe. After the threaded pressure plate is screwed down, it presses against the top of the expansion sleeve. The retaining ring is located at the bottom of the expansion sleeve. After the expansion sleeve is compressed and expanded, it is tensioned with the grouting hole and forms a seal.

[0010] Preferably, the expansion sleeve has a plurality of axially equidistant leak-proof rings.

[0011] Preferably, the self-sealing device includes a plug, an installation tube, a spring, a limiting cap, and an end cap. A connecting plate is provided at the upper end of the installation tube. The end cap is fixedly installed on the top of the slurry inlet pipe. The connecting plate is clamped between the end cap and the slurry inlet pipe. A rod is coaxially provided at the upper end of the plug, and the rod is inserted upwards into the installation tube. The limiting cap is fixed to the upper end of the rod. A nut is provided at the lower end of the installation tube, and the rod passes through the nut. The spring is sleeved on the rod and acts between the nut and the limiting cap. Under the action of the spring, the plug moves upwards and seals the lower end of the slurry inlet pipe. A sealing washer is sandwiched between the nut and the installation tube. A sealing ring is clamped on the inner wall of the nut, forming a seal between the sealing ring and the rod. A vent hole is provided on the outer wall of the end cap, and a second sealing washer is provided between the connecting plate and the end cap.

[0012] Preferably, the lower end of the slurry inlet pipe is provided with a conical opening, and the plug has a conical outer sealing surface, which forms a seal after closing with the wall of the opening.

[0013] Preferably, a tapered guide surface is provided at the top of the outer wall of the mounting pipe, which corresponds to the connecting pipe, so that the slurry entering from the connecting pipe is guided downward after impacting the guide surface.

[0014] Preferably, a guide groove is provided on the inner wall of the mounting tube, the guide groove extending downward through the mounting tube, a guide block is provided on the outer wall of the limiting cap, the guide block cooperating with the guide groove, a threaded inner hole is provided inside the insertion rod, the lower end of the threaded inner hole is closed, and the upper end extends upward through the insertion rod, a pull rod is provided at the axis of the end cap, a baffle is provided near the top of the pull rod, a handle is provided at the upper end of the pull rod, the handle is perpendicular to the pull rod, and a threaded part is provided at the lower part of the pull rod, the threaded part cooperating with the threaded inner hole.

[0015] The beneficial effects of this utility model are:

[0016] Double sealing for reliability: The radial expansion seal of the grouting hole is achieved through the tensioning component, and the automatic sealing of the lower end of the grout inlet pipe is achieved through the self-sealing device. The double sealing structure effectively prevents grout from overflowing during grouting and grout from flowing back after grouting is stopped, thereby improving the stability of grouting pressure and construction quality.

[0017] Securely fixed: After expansion, the expansion sleeve fits tightly against the wall of the grouting hole. The friction generated can effectively fix the grouting pipe, prevent displacement during grouting, and ensure accurate grouting position.

[0018] Easy to operate: The orifice can be sealed and fixed by rotating the threaded pressure plate, and the self-sealing device can be opened and closed by rotating the handle. The structure is simple, the operation is efficient, and the construction difficulty is reduced.

[0019] Excellent sealing performance: The leak-proof ring of the expansion sleeve, the sealing gasket at the nut, and the sealing ring form multiple auxiliary seals, further improving the reliability of the seal. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is the front view of the device;

[0022] Figure 2 This is a half-sectional view of the device;

[0023] Figure 3 This is a magnified view of point A;

[0024] Figure 4 This is a magnified view of point B;

[0025] Figure 5 This is a top view of the limit cap. Detailed Implementation

[0026] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0027] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0028] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", 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.

[0029] Furthermore, in the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" 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 communication 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.

[0031] See Figure 1 The grouting device shown includes a grout inlet pipe 1, a tensioning assembly 2, and a self-sealing device 3. The tensioning assembly 2 is installed outside the grout inlet pipe 1 so that when the grout inlet pipe 1 is inserted into the grouting hole, the expansion of the tensioning assembly 2 forms a seal near the hole opening, thereby preventing grout leakage and fixing the grout inlet pipe. The self-sealing device is coaxially installed inside the grout inlet pipe, thereby preventing the grout inlet pipe 1 from coming off during grouting. When grouting stops, the self-sealing device 3 seals the lower end of the grout inlet pipe 1, preventing grout overflow after the grouting is full. A connecting pipe 11 for connecting to a grouting hose is provided on the side wall of the grout inlet pipe 1 near the top.

[0032] See Figure 2 As shown, an annular groove 12 is provided at the lower middle part of the outer wall of the grout inlet pipe 1. A retaining ring 13 is provided at the lower edge of the groove 12 on the outer wall of the grout inlet pipe 1. The tensioning assembly 2 includes an expansion sleeve 21 and a threaded pressure plate 22. The expansion sleeve 21 is made of elastic rubber and is assembled in the groove 12 with an interference fit. The threaded pressure plate 22 is threaded with the grout inlet pipe 1. After the threaded pressure plate 22 is screwed down, it presses against the top of the expansion sleeve 21. The retaining ring 13 is located at the bottom of the expansion sleeve 21. After the expansion sleeve 21 is compressed and expanded, it is tensioned with the grouting hole and forms a seal.

[0033] In the above technical solution, the expansion sleeve 21 is interference-fitted with the grouting hole. During installation, the threaded pressure plate 22 is screwed on first to keep the expansion sleeve 21 in an uncompressed state. After the expansion sleeve 21 is inserted into the grouting hole along with the grouting pipe, the threaded pressure plate 22 is screwed off to further expand the outer diameter of the expansion sleeve 21, thereby achieving a tension seal with the grouting hole.

[0034] The expansion sleeve 21 has a plurality of axially equidistant leak-proof rings 221.

[0035] The purpose of the leak-proof ring 221 is twofold: firstly, it facilitates the axial compression of the expansion sleeve 21; secondly, it allows for the formation of multiple leak-proof features.

[0036] See Figure 2 , Figure 3 and Figure 4 As shown, the self-sealing device 3 includes a plug 31, an installation tube 32, a spring 33, a limiting cap 34, and an end cap 35. A connecting plate 36 is provided at the upper end of the installation tube 32. The end cap 35 is fixedly installed on the top of the slurry inlet pipe 1. The connecting plate 36 is clamped between the end cap 35 and the slurry inlet pipe 1. A rod 37 is coaxially provided at the upper end of the plug 31. The rod 37 is inserted upwards into the installation tube 32. The limiting cap 34 is fixed to the upper end of the rod 37. A nut 38 is provided at the lower end of the installation tube 32. The rod 37 passes through the nut 38. The cap 38, the spring 33 is sleeved on the insert rod 37, the spring 33 acts between the nut 38 and the limiting cap 34, under the action of the spring 33, the plug 31 moves upward and seals the lower end of the slurry inlet pipe 1, a sealing washer 311 is sandwiched between the nut 38 and the mounting pipe 32, a sealing ring 381 is stuck on the inner wall of the nut 38, and a seal is formed between the sealing ring 381 and the insert rod 37; a vent hole 355 is provided on the outer wall of the end cap 35, and a second sealing washer 356 is provided between the connecting plate 36 and the end cap 35.

[0037] In the above technical solution, the spring allows the plug 31 to move upward and seal the lower end of the grout inlet pipe 1. During grouting, the high-pressure injection of grout will push open the plug 31. When the grout in the grouting hole is full, the grouting pressure increases and some grout overflows from the crack. At this time, the grouting pump is turned off, and the plug 31 is pushed back under the action of the grout, sealing the lower end of the grout inlet pipe 1.

[0038] See Figure 2 As shown, the lower end of the slurry inlet pipe 1 is provided with a conical opening hole 121, and the plug 31 has a conical outer sealing surface 321. The outer sealing surface 321 forms a seal after closing with the hole wall of the opening hole 121.

[0039] In the above technical solution, the opening hole 121 can guide the return of the plug 31.

[0040] See Figure 2 As shown, a tapered guide surface 321 is provided at the top of the outer wall of the mounting pipe 32. The guide surface 321 corresponds to the connecting pipe so that the slurry entering from the connecting pipe is guided downward after impacting the guide surface.

[0041] See Figures 2 to 5 As shown, a guide groove 322 is provided on the inner wall of the mounting tube 32, and the guide groove 322 extends downward through the mounting tube 32. A guide block 341 is provided on the outer wall of the limiting cap 34, and the guide block 341 cooperates with the guide groove 322. A threaded inner hole 371 is provided inside the insertion rod 37. The lower end of the threaded inner hole 371 is closed, and the upper end extends upward through the insertion rod 37. A pull rod 351 is provided at the axis of the end cover 35. A baffle 352 is provided near the top of the pull rod 351. A handle 353 is provided at the upper end of the pull rod 351. The handle 353 pulls the pull rod 351 vertically. A threaded part (not shown) is provided at the lower part of the pull rod 351, and the threaded part cooperates with the threaded inner hole 371.

[0042] When the threaded part is screwed into the threaded inner hole 371, the downward movement of the pull rod 351 is limited by the baffle 352. Continuing to rotate the pull rod 351 will pull the insert rod 37 upward, so that the plug 31 is lifted up and forms a seal on the opening hole 121.

[0043] It is mainly used when grouting is performed at multiple points simultaneously. When the valve corresponding to one of the grout inlet pipes is damaged, causing the grout inlet pipe at that point to be unable to be closed, the plug 31 is moved upward by the cooperation of the pull rod 371 and the insertion rod 37, thereby preventing the grout inlet pipe from continuing to discharge grout.

[0044] Working principle

[0045] Installation and fixing: Insert the grout inlet pipe into the grouting hole to the preset depth, rotate the threaded pressure plate to move the threaded pressure plate downward along the outer wall of the grout inlet pipe, and squeeze the expansion sleeve; the expansion sleeve expands radially under the downward pressure of the threaded pressure plate and the limiting action of the retaining ring, and the leak-proof ring on its outer wall fits tightly with the hole wall of the grouting hole, which not only seals the hole opening, but also fixes the grout inlet pipe by friction to prevent displacement during grouting;

[0046] Grouting process: Connect the grouting hose to the connecting pipe, start the grouting equipment, and the grout enters the grout inlet pipe through the connecting pipe. After impacting the conical guide surface of the installation pipe, it flows downward along the gap between the outer wall of the installation pipe and the inner wall of the grout inlet pipe, and is injected into the formation through the opening at the lower end of the grout inlet pipe.

[0047] Grouting stop sealing: After grouting stops, the spring extends under its own elastic restoring force, pushing the insert rod to move upward, and the plug moves upward accordingly. Its conical outer sealing surface fits tightly with the conical opening of the grout inlet pipe, realizing the self-sealing of the lower end of the grout inlet pipe and preventing the backflow or overflow of residual grout in the pipe.

[0048] Disassembly and recycling: After grouting is completed, rotate the threaded pressure plate in the opposite direction to release the pressure on the expansion sleeve. The expansion sleeve elastically contracts and separates from the wall of the grouting hole, so the grout inlet pipe can be pulled out of the grouting hole for easy recycling and reuse.

[0049] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0050] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0051] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0052] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0053] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0054] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. 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 grout discharge device for grouting, characterized in that: The device includes a grout inlet pipe, a tensioning assembly, and a self-sealing device. The tensioning assembly is installed outside the grout inlet pipe so that when the grout inlet pipe is inserted into the grouting hole, the expansion of the tensioning assembly forms a seal near the hole opening, thus fixing the grout inlet pipe. The self-sealing device is coaxially installed inside the grout inlet pipe. When grouting stops, the self-sealing device seals the lower end of the grout inlet pipe. A connecting pipe for connecting to a grouting hose is provided near the top of the side wall of the grout inlet pipe.

2. The grout outlet device for grouting according to claim 1, characterized in that: An annular groove is provided at the lower middle part of the outer wall of the grout inlet pipe. A retaining ring is provided at the lower edge of the groove on the outer wall of the grout inlet pipe. The tensioning assembly includes an expansion sleeve and a threaded pressure plate. The expansion sleeve is made of elastic rubber and fits into the groove with an interference fit. The threaded pressure plate is threaded into the grout inlet pipe. After the threaded pressure plate is screwed down, it presses against the top of the expansion sleeve. The retaining ring is located at the bottom of the expansion sleeve. After the expansion sleeve is compressed and expanded, it is tensioned with the grouting hole and forms a seal.

3. The grout outlet device for grouting according to claim 2, characterized in that: The expansion sleeve has multiple leak-proof rings that are axially equidistant.

4. The grout outlet device for grouting according to claim 1, characterized in that: The self-sealing device includes a plug, an installation tube, a spring, a limiting cap, and an end cap. A connecting plate is provided at the upper end of the installation tube. The end cap is fixedly installed at the top of the slurry inlet pipe. The connecting plate is clamped between the end cap and the slurry inlet pipe. A rod is coaxially provided at the upper end of the plug, and the rod is inserted upwards into the installation tube. The limiting cap is fixed to the upper end of the rod. A nut is provided at the lower end of the installation tube, and the rod passes through the nut. The spring is sleeved on the rod and acts between the nut and the limiting cap. Under the action of the spring, the plug moves upwards and seals the lower end of the slurry inlet pipe. A sealing washer is sandwiched between the nut and the installation tube. A sealing ring is clamped on the inner wall of the nut, forming a seal between the sealing ring and the rod. A vent hole is provided on the outer wall of the end cap, and a second sealing washer is provided between the connecting plate and the end cap.

5. The grout outlet device for grouting according to claim 4, characterized in that: The lower end of the slurry inlet pipe is provided with a conical opening, and the plug has a conical outer sealing surface, which forms a seal after closing with the wall of the opening.

6. The grout outlet device for grouting according to claim 4, characterized in that: A tapered guide surface is provided at the top of the outer wall of the installation pipe, which corresponds to the connecting pipe, so that the slurry entering from the connecting pipe is guided downward after impacting the guide surface.

7. The grout outlet device for grouting according to claim 6, characterized in that: The inner wall of the mounting tube is provided with a guide groove that extends downward through the mounting tube. A guide block is provided on the outer wall of the limiting cap, and the guide block cooperates with the guide groove. The insert rod has a threaded inner hole inside, the lower end of which is closed and the upper end extends upward through the insert rod. A pull rod is provided at the axis of the end cap. A baffle is provided near the top of the pull rod. A handle is provided at the upper end of the pull rod, and the handle is perpendicular to the pull rod. A threaded part is provided at the lower part of the pull rod, and the threaded part cooperates with the threaded inner hole.

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