Quick-connection grouting device for grouting anchor cable and coal mine grouting anchor cable system

Abstract

The invention discloses a quick-connection grouting device for a grouting anchor cable and a coal mine grouting anchor cable system, and relates to the technical field of coal mine grouting auxiliary devices. The quick-connection grouting device for the grouting anchor cable comprises a gun body, a first clamping plate and a gun head, the gun body comprises a connecting plate, a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate are fixedly arranged on the same side of the connecting plate, the first fixing plate is provided with a penetrating hole, and the second fixing plate is provided with a second clamping plate. The first clamping plate is adjustably arranged in the penetrating hole along the radial position of the penetrating hole, the gun head is arranged on the second fixing plate, one end of the gun head is used for being inserted into a hollow grouting pipe in the grouting anchor cable in a matched mode, and the other end of the gun head is used for being connected with a high-pressure grouting rubber pipe. According to the quick-connection grouting device for the grouting anchor cable, connection and disassembly between the grouting anchor cable and the high-pressure grouting rubber pipe can be more convenient and faster, the potential safety hazard of disconnection between the grouting anchor cable and the high-pressure grouting rubber pipe is eliminated, the quick-connection grouting device can be repeatedly used, and the cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine grouting auxiliary devices, and in particular to a quick-connect grouting device for a grouting anchor cable and a coal mine grouting anchor cable system. Background Art

[0002] Grouting anchor cables in underground coal mines are suitable for supporting coal mine tunnels in soft and broken areas. Grouting anchor cables are mainly composed of steel strands and hollow grouting pipes. During construction, first drill a hole to a predetermined depth, then put an anchoring agent into the hole, push the anchor cable into the hole, and pre-tension it. Finally, inject slurry into the hollow grouting pipe to achieve the purpose of grouting. However, the grouting pressure during the grouting process can generally reach more than 5Mpa. In order to ensure the connection strength between the hollow grouting pipe inside the grouting anchor cable and the grouting high-pressure hose, in related technologies, most grouting anchor cables use a threaded connection at the tail of the cable body to connect the hollow grouting pipe to the grouting high-pressure hose.

[0003] The threaded connection method effectively ensures the connection strength between the grouting anchor cable and the grouting high-pressure hose. However, the following problems also exist in actual applications: the tail end of each grouting anchor cable needs to be additionally processed with a threaded connection device. This process not only increases the processing links of the grouting anchor cable, but also has high requirements for processing accuracy, thereby leading to an increase in the processing cost of the grouting anchor cable; in the actual construction process, the speed of the threaded connection is relatively slow and the construction efficiency is low; and the threaded connection method also has the problem of loose connection. When the grouting pressure is high, there is still a safety risk of the high-pressure hose falling off. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes a quick-connect grouting device for a grouting anchor cable, which can make the connection and disassembly between the grouting anchor cable and the high-pressure grouting hose more convenient, eliminate the safety hazard of disconnection between the grouting anchor cable and the high-pressure grouting hose, and is reusable, saving costs.

[0006] The embodiment of the present invention also provides a coal mine grouting anchor cable system.

[0007] The quick-connect grouting device for grouting anchor cable according to the embodiment of the present invention comprises:

[0008] A gun body, the gun body comprising a connecting plate, a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate are arranged on the same side of the connecting plate and are fixedly connected to the connecting plate, and the first fixing plate is provided with a through hole;

[0009] A first clamping plate, which is arranged at the through hole and has an adjustable radial position along the through hole, and is used for clamping and fixing the grouting anchor cable;

[0010] A gun head, wherein the gun head is arranged on the second fixing plate, an end of the gun head close to the first fixing plate is used for plugging and fitting into the hollow grouting pipe in the grouting anchor cable, and an end of the gun head away from the first fixing plate is used for connecting with the high-pressure grouting hose.

[0011] The quick-connect grouting device for the grouting anchor cable of the embodiment of the present invention can make the connection and disassembly between the grouting anchor cable and the high-pressure grouting hose more convenient, eliminate the potential safety hazard of disconnection between the grouting anchor cable and the high-pressure grouting hose, and is reusable, saving costs.

[0012] In some embodiments, a driving rod is included, and the driving rod is arranged on the first fixing plate corresponding to the penetration hole. The driving rod extends radially along the penetration hole and its radial position along the penetration hole is adjustable, and the first clamping plate is arranged at the end of the driving rod.

[0013] In some embodiments, the driving rod is threadedly connected to the first fixing plate, and the driving rod is rotatably connected to the first clamping plate, and a rotating rod is provided at one end of the driving rod away from the first clamping plate.

[0014] In some embodiments, a second clamping plate is included, and the second clamping plate is fixed to the mounting hole corresponding to the first clamping plate, and the second fixing plate is coaxially arranged with the gun head, the first clamping plate and the second clamping plate are both arc-shaped plates and are symmetrically arranged on both radial sides of the mounting hole, and the second clamping plate is used to clamp the grouting anchor cable together with the first clamping plate.

[0015] In some embodiments, the diameter of the cylinder corresponding to the arc surface of the first clamping plate used to fit the surface of the grouting anchor is equal to the diameter of the grouting anchor, the diameter of the cylinder corresponding to the arc surface of the second clamping plate used to fit the surface of the grouting anchor is equal to the diameter of the grouting anchor, and the sum of the central angles corresponding to the arc of the cross-section of the first clamping plate and the central angles corresponding to the arc of the cross-section of the second clamping plate are less than 360°.

[0016] In some embodiments, a first anti-slip portion is provided on the arc surface of the first clamping plate close to the second clamping plate, and a second anti-slip portion is provided on the arc surface of the second clamping plate close to the first clamping plate.

[0017] In some embodiments, the gun head includes a first section, a second section, and a third section arranged in sequence, the first section is used to be plugged into a hollow grouting pipe in a grouting anchor, the second section is connected to the second fixed plate and can be adjusted in a direction perpendicular to the second fixed plate, and the third section is used to be connected to a high-pressure grouting hose.

[0018] In some embodiments, the first section is in a truncated cone shape, the outer diameter of the first section decreases in a direction away from the second section, and the first section is used to partially insert and fit into a hollow grouting pipe in a grouting anchor cable.

[0019] In some embodiments, a connecting portion is provided on the second section along an extending direction of the gun head, and the connecting portion is threadedly connected to the second fixing plate.

[0020] The coal mine grouting anchor cable system of the embodiment of the present invention comprises the quick-connect grouting device for the grouting anchor cable of any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a quick-connect grouting device for a grouting anchor cable according to an embodiment of the present invention.

[0022] Figure 2 It is a structural schematic diagram of a first clamping plate and a second clamping plate in a quick-connect grouting device for a grouting anchor cable according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] Gun body 1; connecting plate 11; first fixing plate 12; through hole 121; second fixing plate 13;

[0025] First clamping plate 2; first anti-slip portion 21;

[0026] Gun head 3; first section 31; second section 32; connecting portion 321; third section 33;

[0027] Grouting anchor cable 4; hollow grouting pipe 41;

[0028] Driving rod 5;

[0029] Rotating rod 6;

[0030] The second clamping plate 7 and the second anti-slip portion 71 . DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0032] like Figure 1As shown, the quick-connect grouting device for the grouting anchor 4 of the embodiment of the present invention includes a gun body 1, a first clamping plate 2 and a gun head 3, the gun body 1 includes a connecting plate 11, a first fixing plate 12 and a second fixing plate 13, the first fixing plate 12 and the second fixing plate 13 are arranged on the same side of the connecting plate 11 and are fixedly connected to the connecting plate 11, the first fixing plate 12 is provided with a through hole 121, the first clamping plate 2 is arranged at the through hole 121 and the radial position along the through hole 121 is adjustable, the first clamping plate 2 is used to clamp and fix the grouting anchor 4, the gun head 3 is arranged at the second fixing plate 13, the end of the gun head 3 close to the first fixing plate 12 is used to be inserted and matched with the hollow grouting pipe 41 in the grouting anchor 4, and the end of the gun head 3 away from the first fixing plate 12 is used to be connected to the high-pressure grouting hose.

[0033] When the quick-connect grouting device for the grouting anchor 4 of the embodiment of the present invention is in use, the high-pressure grouting hose is connected to the end of the gun head 3 away from the first fixed plate 12, the position of the first clamping plate 2 is adjusted, the grouting anchor 4 is inserted into the insertion hole 121, and the end of the gun head 3 close to the first fixed plate 12 is inserted into the hollow grouting tube 41 in the grouting anchor 4, and the sealing cooperation between the contact position of the gun head 3 and the hollow grouting tube 41 is ensured to ensure the sealing of the slurry transportation, the position of the first clamping plate 2 is adjusted, the grouting anchor 4 is fixed by the first clamping plate 2 to ensure the connection between the grouting anchor 4 and the gun head 3, and the grouting operation is started. The slurry enters the hollow grouting tube 41 through the gun head 3. After the grouting is completed, the fixation of the grouting anchor 4 by the first clamping plate 2 is released, the grouting anchor 4 is separated from the gun body 1 and the gun head 3, and the grouting device is removed to complete the entire grouting operation.

[0034] The quick-connect grouting device for the grouting anchor cable 4 in the embodiment of the present invention simplifies the connection method between the grouting anchor cable 4 and the high-pressure grouting hose, optimizes the construction process, and changes the traditional threaded connection method into a straight-plug connection method. The connection and disassembly speeds are fast and convenient. The grouting anchor cable 4 is fixed by the first clamping plate 2, thereby ensuring the connection reliability between the grouting anchor cable 4 and the high-pressure grouting hose and eliminating the safety hazard of disconnection between the grouting anchor cable 4 and the high-pressure grouting hose. Secondly, compared with the traditional threaded connection method, after using the quick-connect grouting device, the tail end of the grouting anchor cable 4 can be connected to the high-pressure grouting hose without special processing, and can be reused, saving costs.

[0035] In some embodiments, Figure 1 As shown, it includes a driving rod 5, and the driving rod 5 is arranged on the first fixed plate 12 corresponding to the through hole 121. The driving rod 5 extends radially along the through hole 121 and the radial position along the through hole 121 is adjustable. The first clamping plate 2 is arranged at the end of the driving rod 5. The position of the first clamping plate 2 is adjusted by setting the driving rod 5, which is convenient to operate and convenient to fix the position of the first clamping plate 2.

[0036] Specifically, the driving rod 5 is a threaded rod, which is threadedly connected to the first fixed plate 12. A first through hole is provided on the first clamping plate 2 corresponding to the driving rod 5, and a limiting ring is provided on the first through hole. A first screw is passed through the first through hole, and the first screw cooperates with the limiting ring to stop, and the first screw is threadedly connected to the driving rod 5. A gasket mortgaged on the limiting ring is sleeved on the first screw. The first screw is used to connect the driving rod 5 and the first clamping plate 2 together, and there is a set distance between the first screw and the limiting ring to ensure that the driving rod 5 is rotatably connected to the first clamping plate 2. A rotating rod 6 is provided on the end of the driving rod 5 away from the first clamping plate 2. The driving rod 5 can be driven to rotate by rotating the rotating rod 6, thereby adjusting the position of the first clamping plate 2.

[0037] Optionally, the rotating rod 6 is arranged perpendicular to the driving rod 5, the rotating rod 6 is movably inserted into the driving rod 5, and both ends of the rotating rod 6 are provided with blocks that cooperate with the driving rod 5 to prevent the rotating rod 6 from slipping off the driving rod 5. When the driving rod 5 is driven to rotate by the rotating rod 6, the rotating rod 6 can be slid according to the position of the rotating rod 6 to adjust the length of the rotating rod 6 on one side of the driving rod 5, thereby making it easier to rotate the driving rod 5.

[0038] In some embodiments, Figure 1 and Figure 2 As shown, it includes a second clamping plate 7, which is fixed to the through hole 121 corresponding to the first clamping plate 2, and the second fixing plate 13 is coaxially arranged with the gun head 3. The first clamping plate 2 and the second clamping plate 7 are both arc-shaped plates and are symmetrically arranged on both radial sides of the through hole 121. The second clamping plate 7 is used to clamp the grouting anchor 4 together with the first clamping plate 2.

[0039] Specifically, the first clamping plate 2 is arranged in the mounting hole 121 at a position away from the connecting plate 11, and the second clamping plate 7 is arranged in the mounting hole 121 at a position close to the connecting plate 11. By coaxially arranging the second clamping plate 7 and the gun head 3, when installing the grouting anchor 4, it is convenient to align the grouting anchor 4 with the gun head 3, thereby facilitating the matching connection between the grouting anchor 4 and the gun head 3 and ensuring the sealing of the connection between the grouting anchor 4 and the gun head 3. The connecting line of the first clamping plate 2 and the second clamping plate 7 is perpendicular to the connecting plate 11. The first clamping plate 2 and the second clamping plate 7 are both arc-shaped plates. When the grouting anchor 4 is clamped and fixed, the contact area between the first clamping plate 2 and the second clamping plate 7 and the grouting anchor 4 can be increased, thereby ensuring the clamping effect of the first clamping plate 2 and the second clamping plate 7 on the grouting anchor 4.

[0040] Optionally, a second through hole is provided on the connecting plate 11 corresponding to the through hole 121, the second through hole is connected to the through hole 121, a second screw threadedly connected to the second clamping plate 7 is passed through the second through hole, and the second clamping plate 7 and the connecting plate 11 are fixed together by the second screw.

[0041] In some embodiments, Figure 1 and Figure 2 As shown, the diameter of the cylinder corresponding to the arc surface of the first clamp plate 2 that is used to fit the surface of the grouting anchor cable 4 is equal to the diameter of the grouting anchor cable 4, the diameter of the cylinder corresponding to the arc surface of the second clamp plate 7 that is used to fit the surface of the grouting anchor cable 4 is equal to the diameter of the grouting anchor cable 4, and the sum of the central angles corresponding to the arc of the cross section of the first clamp plate 2 and the central angles corresponding to the arc of the cross section of the second clamp plate 7 is less than 360°.

[0042] By limiting the size of the first clamp 2 and the second clamp 7, when the first clamp 2 and the second clamp 7 clamp the grouting anchor 4, the contact area between the first clamp 2 and the second clamp 7 and the grouting anchor 4 can be maximized, thereby strengthening the fixing effect of the first clamp 2 and the second clamp 7 on the grouting anchor 4. At the same time, the sum of the central angle corresponding to the arc of the cross section of the first clamp 2 and the central angle corresponding to the arc of the cross section of the second clamp 7 is set to be less than 360°, which can avoid interference between the first clamp 2 and the second clamp 7 when fixing the grouting anchor 4, and further ensure the clamping effect of the first clamp 2 and the second clamp 7 on the grouting anchor 4.

[0043] In some embodiments, Figure 2 As shown, the arc surface of the first clamp plate 2 close to the second clamp plate 7 is provided with a first anti-slip portion 21, and the arc surface of the second clamp plate 7 close to the first clamp plate 2 is provided with a second anti-slip portion 71. By providing the first anti-slip portion 21 and the second anti-slip portion 71, the friction between the first clamp plate 2 and the grouting anchor 4 and the second clamp plate 7 and the grouting anchor 4 is increased when the first clamp plate 2 and the second clamp plate 7 clamp the grouting anchor 4, thereby ensuring the clamping effect of the first clamp plate 2 and the second clamp plate 7 on the grouting anchor 4, and further ensuring the sealing fit between the hollow grouting tube 41 in the grouting anchor 4 and the gun head 3.

[0044] Optionally, the first anti-slip portion 21 and the second anti-slip portion 71 have the same structure, and are both a plurality of dot-shaped protrusions or a threaded line or wavy line protrusion structure continuously arranged along the axial direction of the first clamping plate 2 .

[0045] In some embodiments, Figure 1 As shown, the gun head 3 includes a first section 31, a second section 32 and a third section 33 which are arranged in sequence. The first section 31 is used to be plugged into the hollow grouting pipe 41 in the grouting anchor cable 4, the second section 32 is connected to the second fixed plate 13 and its position is adjustable in a direction perpendicular to the second fixed plate 13, and the third section 33 is used to be connected to the high-pressure grouting hose.

[0046] By setting the gun head 3 to be a first section 31, a second section 32 and a third section 33, it is convenient to position and install the gun head 3. At the same time, the position of the second section 32 relative to the second fixed plate 13 is adjustable. When the first section 31 is plugged into the hollow grouting pipe 41 in the grouting anchor 4, the position of the second section 32 can be adjusted to ensure the sealed plug-in between the first section 31 and the hollow grouting pipe 41 in the grouting anchor 4, thereby avoiding slurry leakage and ensuring the safety and reliability of the grouting operation.

[0047] In some embodiments, Figure 1 As shown, the first section 31 is in a truncated cone shape, and the outer diameter of the first section 31 decreases in the direction away from the second section 32. The first section 31 is used to partially plug and match with the hollow grouting pipe 41 in the grouting anchor 4. By setting the first section 31 to be in a truncated cone shape, it is convenient to plug and match the first section 31 with the hollow grouting pipe 41, and at the same time, it is convenient to ensure the sealing plug-in between the first section 31 and the hollow grouting pipe 41 in the grouting anchor 4 and the reliability of the grouting operation.

[0048] Optionally, a conical sealing ring is provided on the first section 31 to ensure sealing cooperation between the first end and the hollow grouting pipe 41 in the grouting anchor cable 4 .

[0049] In some embodiments, Figure 1 As shown, a connecting portion 321 is provided on the second section 32 along the extension direction of the gun head 3, and the connecting portion 321 is an external thread arranged on the second section 32. The second section 32 is threadedly connected to the second fixing plate 13 through the external thread. When the gun head 3 is installed, the position of the gun head 3 can be adjusted through the threaded connection between the second section 32 and the second fixing plate 13, thereby ensuring the sealed connection between the first section 31 and the hollow grouting pipe 41 in the grouting anchor cable 4, so as to ensure the safety and reliability of the grouting operation.

[0050] Optionally, two limit nuts are threadedly connected to the connecting portion 321, and the two limit nuts are arranged on both sides of the second fixed plate 13. By tightening the two limit nuts, the position of the second section 32 can be fixed again to prevent the second section 32 from moving relative to the second fixed plate 13 during the grouting operation, thereby ensuring the sealed connection between the first section 31 and the hollow grouting pipe 41 in the grouting anchor cable 4.

[0051] Optionally, an adjusting nut is provided on the second section 32 , and the adjusting nut is coaxially and fixedly arranged on the second section 32 . The second section 32 can be rotated by rotating the adjusting nut, and the operation is convenient and reliable.

[0052] The coal mine grouting anchor cable system according to an embodiment of the present invention is described below.

[0053] The coal mine grouting anchor cable system of the embodiment of the present invention comprises the quick-connect grouting device for the grouting anchor cable of any of the above embodiments.

[0054] The coal mine grouting anchor system of the embodiment of the present invention can realize the rapid connection and disassembly between the grouting anchor and the high-pressure grouting hose while ensuring the connection reliability between the grouting anchor and the high-pressure grouting hose through the quick-connect grouting device for the grouting anchor. The operation is convenient, and the safety hazard of disconnection between the grouting anchor and the high-pressure grouting hose is eliminated. The quick-connect grouting device for the grouting anchor can be reused, saving costs.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0060] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A quick-connect grouting device for a grouting anchor cable, characterized in that: include: A gun body, the gun body comprising a connecting plate, a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate are arranged on the same side of the connecting plate and are fixedly connected to the connecting plate, and the first fixing plate is provided with a through hole; A first clamping plate, which is arranged at the through hole and has an adjustable radial position along the through hole, and is used for clamping and fixing the grouting anchor cable; A gun head, wherein the gun head is arranged on the second fixing plate, an end of the gun head close to the first fixing plate is used for plugging and fitting into the hollow grouting pipe in the grouting anchor cable, and an end of the gun head away from the first fixing plate is used for connecting with the high-pressure grouting hose.

2. The quick-connect grouting device for grouting anchor cable according to claim 1, characterized in that: It comprises a driving rod, which is arranged on the first fixing plate corresponding to the insertion hole, the driving rod extends radially along the insertion hole and its radial position along the insertion hole is adjustable, and the first clamping plate is arranged at the end of the driving rod.

3. The quick-connect grouting device for grouting anchor cable according to claim 2, characterized in that: The driving rod is threadedly connected to the first fixing plate, and the driving rod is rotatably connected to the first clamping plate. A rotating rod is provided at one end of the driving rod away from the first clamping plate.

4. The quick-connect grouting device for grouting anchor cable according to claim 1, characterized in that: It includes a second clamping plate, which is fixed to the insertion hole corresponding to the first clamping plate, and the second fixing plate is coaxially arranged with the gun head. The first clamping plate and the second clamping plate are both arc-shaped plates and are symmetrically arranged on both radial sides of the insertion hole. The second clamping plate is used to clamp the grouting anchor cable together with the first clamping plate.

5. The quick-connect grouting device for grouting anchor cable according to claim 4, characterized in that: The diameter of the cylinder corresponding to the arc surface of the first clamping plate used to fit the surface of the grouting anchor is equal to the diameter of the grouting anchor, the diameter of the cylinder corresponding to the arc surface of the second clamping plate used to fit the surface of the grouting anchor is equal to the diameter of the grouting anchor, and the sum of the central angles corresponding to the arc of the cross-section of the first clamping plate and the central angles corresponding to the arc of the cross-section of the second clamping plate are less than 360°.

6. The quick-connect grouting device for grouting anchor cable according to claim 4, characterized in that: A first anti-slip portion is provided on the arc surface of the first clamping plate near the second clamping plate, and a second anti-slip portion is provided on the arc surface of the second clamping plate near the first clamping plate.

7. The quick-connect grouting device for grouting anchor cable according to claim 1, characterized in that: The gun head includes a first section, a second section and a third section arranged in sequence, the first section is used to be plugged into a hollow grouting pipe in a grouting anchor cable, the second section is connected to the second fixing plate and is positionally adjustable in a direction perpendicular to the second fixing plate, and the third section is used to be connected to a high-pressure grouting hose.

8. The quick-connect grouting device for grouting anchor cable according to claim 7, characterized in that: The first section is in a truncated cone shape, and the outer diameter of the first section decreases in a direction away from the second section. The first section is used for partially inserting and fitting into a hollow grouting pipe in a grouting anchor cable.

9. The quick-connect grouting device for grouting anchor cable according to claim 7, characterized in that: A connecting portion is provided on the second section along the extending direction of the gun head, and the connecting portion is threadedly connected to the second fixing plate.

10. A coal mine grouting anchor cable system, characterized in that: The invention comprises a quick-connect grouting device for a grouting anchor cable as described in any one of claims 1 to 9.

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