Grouting head and grouting system and grouting method composed of the same

Abstract

The invention discloses a grouting head and a grouting system and a grouting method composed of the grouting head and the grouting head comprises a check valve body, and a horizontally arranged ring plate is sleeved on the outer wall of the check valve body, the inner side of the ring plate is connected and fixed to the check valve body, the check valve body has a feed interface and a discharge port, the feed interface is located above the ring plate, and the discharge port is located below the ring plate, the ring plate is used to connect with the lower end of a filling pipe and seal the lower end of the filling pipe, and the feed interface is used to communicate with the lower end of a grouting pipe, and the structure is simple, so that the grouting head is sealed and installed at the lower end of the filling pipe, and the lower end of the filling pipe is sealed, so that mud will not enter the filling pipe from the lower end, and the grouting pipe is used to inject cement slurry into the check valve body, so that the cement slurry is discharged to the outside of the filling pipe through the check valve, so that the cement slurry is gradually filled and accumulated from bottom to top in the drilling well and the mud in the drilling well is squeezed out, so that the grouting effect is better.

Description

Technical Field

[0001] The invention relates to the technical field of mine filling mining, in particular to a grouting head and a grouting system and a grouting method composed of the grouting head and the grouting system and the grouting method. Background Art

[0002] In the field of mine filling engineering, the filling of the empty area in the deep shaft mining area is generally done by laying a filling pipe in the filling borehole, and then pumping or conveying the filling slurry prepared by the ground filling station to the empty area to be filled (i.e. the empty area filled with mud between the pipe and the borehole) by gravity, so that the filling pipe can be effectively fixed in the borehole. In actual engineering construction, since the borehole has a certain deflection rate during the construction process, it is difficult for the bottom of the borehole to fall on the determined point during the design, so it is impossible to use the forward grouting method to fix it. Summary of the invention

[0003] In order to achieve the above-mentioned object, one of the objects of the present invention is to provide a grouting head which has a simple structure and can realize grouting from the inside of a filling pipe to the outside by adopting a grouting pipe.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a grouting head, comprising a check valve body, a horizontally arranged ring plate is also sleeved on the outer wall of the check valve body, the inner side of the ring plate is connected and fixed to the check valve body, the check valve body has a feed interface and a discharge port, and the feed interface is located above the ring plate, and the discharge port is located below the ring plate, the ring plate is used to connect with the lower end of the filling pipe and seal the lower end of the filling pipe, and the feed interface is used to communicate with the lower end of the grouting pipe.

[0005] The beneficial effects of the above technical solution are: its structure is simple, so that the grouting head is sealed and installed at the lower end of the filling pipe, and the lower end of the filling pipe is blocked, so that mud will not enter the filling pipe from the lower end. In addition, a grouting pipe is used to inject cement slurry into the check valve body, so that the cement slurry is discharged to the outside of the filling pipe through the check valve, thereby realizing that the cement slurry is gradually filled and accumulated from bottom to top in the well and the mud in the well is squeezed out, so that the cement slurry is more fully utilized and the grouting effect is better.

[0006] The check valve body in the above technical scheme includes a shell, a valve core and an elastic member, the shell is hollow inside, the feed interface is located in the middle of the upper end of the shell, the discharge port is located at the lower end or side wall of the shell, the feed interface and the discharge port are both connected to the inside of the shell, the ring plate is horizontally sleeved on the outer wall of the shell, and its inner side is sealed and fixed to the shell, the valve core is placed in the shell, the elastic member is installed in the shell and is located below the valve core, the lower end of the elastic member is abutted against the shell, and the upper end of the elastic member is abutted against the lower end of the valve core, the elastic member is used to apply elastic tension to the valve core so that the valve core blocks the feed interface, or the valve core overcomes the elastic tension of the elastic member under the action of the material pressure at the feed interface to squeeze the elastic member downward to connect the feed interface and the discharge port.

[0007] The beneficial effects of the above technical solution are: its structure is simple, and it can prevent the mud in the drilling well from flowing into the grouting pipe. Only when the pressure at the feed interface is greater than the pressure at the discharge port, and the pressure difference between the two is sufficient to overcome the elastic tension of the elastic part and make the elastic part contract to connect the feed interface and the discharge port, the cement slurry in the grouting pipe will flow out into the drilling well through the check valve body.

[0008] The elastic member in the above technical solution is a spring.

[0009] The beneficial effects of the above technical solution are: it has a simple structure, good stability and is easy to install.

[0010] The valve core in the above technical solution includes a slide seat and a valve block, the slide seat is horizontally slidably arranged in the shell, and a through hole is provided in the middle thereof which passes through it from top to bottom, and a plurality of support blocks are evenly spaced and protruding upward at the edge of the through hole at the upper end of the slide seat, and the valve block is installed on the plurality of support blocks, and the valve block is located directly below the feed interface, and the upper end of the elastic member is abutted against the slide seat, and the slide seat drives the valve block to move upward to block the feed interface under the elastic tension of the elastic member, or the valve block overcomes the elastic tension of the elastic member under the action of the material pressure at the feed interface and drives the slide seat to move downward, and opens the feed interface so that the feed interface is connected with the discharge port and / or is connected through the through hole on the slide seat.

[0011] The beneficial effect of the above technical solution is that its structure is simple, so that as long as the valve core can shrink the elastic member under the material pressure at the feed interface to open the feed interface, the feed interface can be connected with the discharge port.

[0012] In the above technical solution, the valve block is spherical, and the valve block is placed on the upper ends of the plurality of support blocks.

[0013] The beneficial effects of the above technical solution are: its structure is simple, and the valve block will not affect its sealing effect on the feed interface when rotating, and the wear of various parts thereof is relatively uniform.

[0014] The above technical solution also includes a straight tube-shaped and vertically arranged connector, the lower end of the connector extends into the feed interface, and the two are in sealing contact, and a plurality of pin holes are arranged on the side wall of the feed interface at an annular interval, and a plurality of limiting grooves corresponding to the pin holes are recessed on the outer wall of the connector, each of the pin holes is aligned with the corresponding limiting groove, a pin column is fixedly installed in each of the limiting grooves, and one end of each of the pin columns located in the feed interface extends into the corresponding limiting groove, and a plurality of the pin columns limit the connector on the feed interface, and the upper end of the connector is used to connect and communicate with the lower end of the grouting pipe.

[0015] The beneficial effect of the above technical solution is that: the lower end of the grouting pipe is connected to the feed interface through the connecting head, and a pin is used to limit the connecting head and the feed interface. After the grouting is completed, the hard connection between the grouting pipe and the feed interface can be disconnected by pulling the grouting pipe upward to destroy the pin at the connecting head and the feed interface, so that the grouting pipe can be taken out and reused.

[0016] The above technical solution also includes a straight tube-shaped guide cone sleeve vertically arranged on the upper end of the check valve body, the lower end of the guide cone sleeve is sleeved outside the connecting head, and an annular gap is formed between the connecting head and the guide cone sleeve, the lower end of the guide cone sleeve is connected to the connecting head, the upper end of the guide cone sleeve protrudes from the upper end of the connecting head, and the part of the inner hole of the guide cone sleeve located above the connecting head is trumpet-shaped, and the guide cone sleeve is used to guide the lower end of the grouting pipe to be aligned with the upper end of the connecting head and extend into the gap so that the lower end of the grouting pipe is sleeved on the upper end of the connecting head.

[0017] The beneficial effect of the above technical solution is that the lower end of the grouting pipe and the connecting head can be accurately connected by the guide cone sleeve.

[0018] A second object of the present invention is to provide a grouting system with a simple structure and using the above-mentioned grouting head.

[0019] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a grouting system, comprising a filling pipe, a grouting pipe and the grouting head as described above, the lower end of the filling pipe is connected to the ring plate, and the ring plate blocks the lower end of the filling pipe, and the outer diameter of the grouting pipe is smaller than the inner diameter of the filling pipe, the grouting pipe is sleeved in the filling pipe, and its lower end is connected to the feed interface, the filling pipe is used to be placed in a borehole, and its lower end extends to the bottom of the well near the borehole, and the upper ends of the filling pipe and the grouting pipe extend to pass through the outside of the borehole.

[0020] The beneficial effects of the above technical solution are: its structure is simple, and cement slurry can be flushed into the well from the lower end through the grouting head, and the grouting pipe can be reused, while it can stably fix the filling pipe in the well.

[0021] A third object of the present invention is to provide a grouting method using the above-mentioned grouting system.

[0022] In order to achieve the above object, the technical solution of the present invention is as follows: A grouting method using the grouting system as described above comprises the following steps:

[0023] Step 1: Drilling a well using a drilling rig;

[0024] Step 2: After the drilling is completed, a grouting head is installed below the filling pipe, and the filling pipe is sunk into the drilled well, and the space between the drilled well and the filling pipe is filled with mud;

[0025] Step 3: sinking the grouting pipe into the filling pipe, and making the lower end of the grouting pipe extend into the guide cone sleeve, and connected and communicated with the upper end of the connector, pouring cement slurry from the upper end of the grouting pipe, and making the cement slurry be discharged into the well through the discharge port of the check valve body, so as to squeeze out the mud in the well outside the filling pipe through the wellhead of the well;

[0026] Step 4: After the mud in the well is drained, wait until the cement slurry in the well solidifies, pull the grouting pipe upward to break the pin between the connector and the feed interface, and disconnect the connector from the feed interface to remove the grouting pipe from the filling pipe, thereby completing the grouting outside the filling pipe and fixing the filling pipe in the well.

[0027] The beneficial effects of the above technical solution are: the method is simple, the cement slurry utilization rate is high, and the grouting pipe can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a simplified structural diagram of the grouting head described in Example 1 of the present invention;

[0029] Figure 2 This is a simplified structural diagram of the housing and the ring plate in Example 1 of the present invention;

[0030] Figure 3 This is a diagram showing the coordination of the filling pipe, the grouting pipe and the grouting head described in Example 2 of the present invention;

[0031] Figure 4 This is a schematic diagram of the grouting method described in Example 3 of the present invention.

[0032] In the figure: 1 grouting head, 11 check valve body, 111 ring plate, 112 shell, 1121 feed interface, 11211 pin hole, 1122 discharge port, 113 valve core, 1131 slide seat, 11311 through hole, 11312 support block, 1132 valve block, 114 elastic member, 12 connector, 121 limit groove, 122 pin column, 13 guide cone sleeve, 2 filling pipe, 21 pipe clamp, 3 grouting pipe, 4 drilling. DETAILED DESCRIPTION

[0033] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0034] Example 1

[0035] like Figure 1 As shown, this embodiment provides a grouting head, including a check valve body 11, the outer wall of the check valve body 11 is also sleeved with a horizontally arranged ring plate 111, the inner side of the ring plate 111 is connected and fixed to the check valve body 11, the check valve body 11 has a feed interface 1121 and a discharge port 1122, and the feed interface 1121 is located above the ring plate 111, and the discharge port 1122 is located below the ring plate 111, and the ring plate 111 is used to connect with the lower end of the filling pipe 2 and fill the filling pipe 2. The lower end is blocked, and the feed interface 1121 is used to communicate with the lower end of the grouting pipe 3. It has a simple structure, so that the grouting head is sealed and installed at the lower end of the filling pipe 2, and the lower end of the filling pipe 2 is blocked, so that the mud will not enter it from the lower end of the filling pipe 2. In addition, the grouting pipe is used to inject cement slurry into the check valve body, so that the cement slurry is discharged to the outside of the filling pipe 2 through the check valve, so that the cement slurry is gradually filled and accumulated from bottom to top in the well and the mud in the well is squeezed out, so that the cement slurry is more fully utilized and the grouting effect is better.

[0036] like Figure 2As shown, the check valve body 11 in the above technical solution includes a shell 112, a valve core 113 and an elastic member 114, the shell 112 is hollow inside, the feed interface 1121 is located in the middle of the upper end of the shell 112, and the discharge port 1122 is located at the lower end or side wall of the shell 112, the feed interface 1121 and the discharge port 1122 are both communicated with the inside of the shell 112, the ring plate 111 is horizontally sleeved on the outer wall of the shell 112, and its inner side is sealed and fixed to the shell 112, the valve core 113 is placed in the shell 112, the elastic member 114 is installed in the shell 112 and is located below the valve core 113, the lower end of the elastic member 114 is against the shell 112, and the upper end of the elastic member 114 is against the valve core 113. The lower end of the core 113 is abutted, and the elastic member 114 is used to apply elastic tension to the valve core 113 so that the valve core 113 blocks the feed interface 1121, or the valve core 113 overcomes the elastic tension of the elastic member 114 under the action of the material pressure at the feed interface 1121 to squeeze the elastic member 114 downward to the feed interface 1121 and connect with the discharge port 1122. The structure is simple, and it can prevent the mud in the drilling well from flowing into the grouting pipe. Only when the pressure at the feed interface 1121 is greater than the pressure at the discharge port 1122, and the pressure difference between the two is sufficient to overcome the elastic tension of the elastic member 114, and the elastic member 114 is contracted to connect the feed interface and the discharge port, the cement slurry in the grouting pipe will flow out into the drilling well through the check valve body. Preferably, the ring plate is integrally formed with the shell.

[0037] The elastic member 114 in the above technical solution is a spring, which has a simple structure, good stability and is easy to install.

[0038] The valve core 113 in the above technical solution includes a slide seat 1131 and a valve block 1132. The slide seat 1131 is horizontally slidably arranged in the housing 112, and a through hole 11311 is provided in the middle thereof which passes through it from top to bottom. The upper end of the slide seat 1131 is located at the edge of the through hole 11311 and is evenly spaced to protrude upwards with a plurality of support blocks 11312. The valve block 1132 is installed on the plurality of support blocks 11312, and the valve block 1132 is located directly below the feed interface 1121. The upper end of the elastic member 114 abuts against the slide seat 1131. Under the elastic tension of the elastic member 114, the slide seat 1131 drives the valve block 1132 to move upward to block the feed interface 1121, or the valve block 1132 overcomes the elastic tension of the elastic member 114 under the action of the material pressure at the feed interface 1121 and drives the slide seat 1131 to move upwards to block the feed interface 1121. 31 moves downward and opens the feed interface 1121 so that the feed interface 1121 is connected with the discharge port 1122 and / or is connected through the through hole 11311 on the slide 1131. The structure is simple, so that as long as the valve core can shrink the elastic member to open the feed interface under the action of the material pressure at the feed interface, the feed interface and the discharge port can be connected. When the discharge port is arranged at the lower end of the shell or the lower end of the side wall, when the elastic member is compressed, the feed interface and the discharge port are connected through the through hole, and when the discharge port is arranged on the side wall; and when the feed port is blocked, the upper end of the discharge port is located above the slide, and the lower end of the discharge port is located below the slide, at this time, when the spring is compressed, the feed interface and the discharge port are directly connected and connected through the through hole; and when the feed port is blocked, the discharge port is located above the slide, at this time, when the spring is compressed, the feed interface and the discharge port are directly connected.

[0039] In the above technical solution, the valve block 1132 is spherical and rests on the upper ends of the plurality of support blocks 11312. The structure is simple, and the valve block will not affect the sealing effect of the feed interface when rotating. At the same time, the wear of each part is relatively uniform.

[0040] The above technical solution also includes a straight tube-shaped and vertically arranged connector 12, the lower end of the connector 12 extends into the feed interface 1121, and the two are in sealed contact, and a plurality of pin holes 11211 are arranged on the side wall of the feed interface 1121 along the annular interval, and a plurality of limiting grooves 121 corresponding to the pin holes 11211 are recessed on the outer side wall of the connector 12, each of the pin holes 11211 is aligned with the corresponding limiting groove 121, a pin column 122 is fixedly installed in each limiting groove 121, and each of the pin columns 122 is located in the feed interface 1121. One end extends into the corresponding limiting groove 121, and a plurality of pins 122 limit the connector 12 on the feed interface 1121. The upper end of the connector 12 is used to connect and communicate with the lower end of the grouting pipe 3, so that the lower end of the grouting pipe is connected to the feed interface 1121 through the connector, and the pins are used for limiting at the connector and the feed interface 1121. After grouting is completed, the grouting pipe can be pulled upward to destroy the pins at the connector and the feed interface 1121 to disconnect the hard connection between the grouting pipe and the feed interface 1121, so that the grouting pipe can be taken out and reused. Preferably, 3-6 pins are provided, and are evenly distributed along the annular interval of the connector.

[0041] The above technical solution also includes a straight tube-shaped guide cone sleeve 13 vertically arranged at the upper end of the check valve body, the lower end of the guide cone sleeve 13 is sleeved outside the connecting head, and an annular gap is formed between the connecting head 12 and the guide cone sleeve 13, the lower end of the guide cone sleeve 13 is connected to the connecting head 12, the upper end of the guide cone sleeve 13 protrudes from the upper end of the connecting head 12, and the part of the inner hole of the guide cone sleeve 13 located above the connecting head 12 is trumpet-shaped. The guide cone sleeve 13 is used to guide the lower end of the grouting pipe 3 to be aligned with the upper end of the connecting head 12 and extend into the gap so that the lower end of the grouting pipe 3 is sleeved on the upper end of the connecting head 12, so that the lower end of the grouting pipe and the connecting head can be accurately connected through the guide cone sleeve.

[0042] Among them, preferably, the horizontal cross-section of the connecting head is circular on the outside and a regular polygon on the inside, and an external thread is provided on the outer wall of the upper end of the connecting head, and the lower end of the grouting pipe is provided with an internal thread matching the external thread on the connecting head, and the outer side of the horizontal cross-section of the feed interface 1121 is a regular polygon (which may be a regular triangle, regular quadrilateral, regular pentagon or regular hexagon) matching the inside of the connecting head, so that when the feed interface 1121 is inserted into the connecting head and the two are interference fit, even if the connecting head is rotated under the action of external force, the connecting head will not rotate relative to the feed interface 1121, and the lower end of the grouting pipe can be threadedly connected to the upper end of the connecting head.

[0043] Among them, the outer side of the horizontal cross-section of the shell 112 is circular, and the ring plate 111 is annular and coaxially connected to the shell 112. The central axis of the outer side of the feed interface 1121 is coaxially distributed with the shell 112. At the same time, the horizontal cross-section of the guide cone sleeve is annular and coaxially distributed with the shell 112, so that the annular gap between the guide cone sleeve and the upper end of the connecting head is annular, and the lower end of the grouting pipe can be threadedly connected to the upper end of the connecting head and extend into the annular gap.

[0044] Preferably, there are multiple discharge ports 1122 , and the multiple discharge ports 1122 are all arranged on the side wall of the shell 112 and are all located below the ring plate 111 .

[0045] Example 2

[0046] like Figure 3 As shown, this embodiment provides a grouting system, including a filling pipe 2, a grouting pipe 3 and a grouting head 1 as described in Example 1, the lower end of the filling pipe 2 is connected to the ring plate 111, and the ring plate 111 blocks the lower end of the filling pipe 2, and the outer diameter of the grouting pipe 3 is smaller than the inner diameter of the filling pipe 2, the grouting pipe 3 is sleeved in the filling pipe 2, and its lower end is connected to the feed interface 1121, the filling pipe 2 is used to be placed in the borehole 4, and its lower end extends to the bottom of the well near the borehole 4, the upper end of the filling pipe 2 and the upper end of the grouting pipe 3 both extend to pass through the outside of the borehole 4, its structure is simple, and the grouting head is used to realize the flushing of cement slurry from the lower end of the borehole into it, and the grouting pipe can be reused, and at the same time it can make the filling pipe 2 stably fixed in the borehole.

[0047] Among them, the filling pipe 2 is formed by connecting multiple filling sub-pipes, and similarly the grouting pipe is formed by connecting multiple grouting sub-pipes, wherein the lower end of each grouting sub-pipe is provided with an internal thread, and the upper end thereof is provided with an external thread matching with its lower end, so that the ends of two adjacent grouting sub-pipes close to each other are threadedly connected, and the internal thread at the lower end of the grouting sub-pipe at the lowest end is threadedly connected to the upper end of the connecting head.

[0048] Among them, it is further preferred that the ring plate is connected to the lower end of the filling pipe through a tubular pipe clamp 21, and the outer diameter of the ring plate, the filling pipe and the inner diameter of the pipe clamp 21 are all consistent, so that the lower end of the filling pipe can be coaxially interference sleeved in the pipe clamp 21, and the ring plate is coaxially interference installed in the pipe clamp 21, so that the lower end of the filling pipe is sealed and fixed to the ring plate.

[0049] Example 3

[0050] like Figure 3 and Figure 4As shown, this embodiment provides a grouting method using the grouting system as described in Example 2, comprising the following steps:

[0051] Step 1: Drilling a well 4 using a drilling rig;

[0052] Step 2: After the drilling 4 is completed, the grouting head 1 is installed below the filling pipe 2, and the filling pipe 2 is sunk into the drilling 4, and the space between the drilling 4 and the filling pipe 2 is filled with mud;

[0053] Step 3: sink the grouting pipe 3 into the filling pipe 2, and make the lower end of the grouting pipe 3 extend into the guide cone sleeve 13, and connect and communicate with the upper end of the connector 12, pour cement slurry from the upper end of the grouting pipe 3, and make the cement slurry be discharged into the borehole 4 through the discharge port 1122 of the check valve body 11, so as to squeeze out the mud in the borehole 4 outside the filling pipe 2 through the wellhead of the borehole 4;

[0054] Step 4: After the mud in the well 4 is drained, wait until the cement slurry in the well 4 solidifies, pull the grouting pipe 3 upward to break the pin 122 between the connector 12 and the feed interface 1121, and disconnect the connector 12 from the feed interface 1121 to remove the grouting pipe 3 from the filling pipe 2, thereby completing the grouting of the outside of the filling pipe 2 and fixing the filling pipe 2 in the well 4.

[0055] The beneficial effects of the above technical solution are: the method is simple, the cement slurry utilization rate is high, and the grouting pipe can be reused.

[0056] Among them, after the middle section of the underground filling tunnel is opened up and the filling pipe 2 is found, the cement is consolidated at the lower end of the filling pipe, and the check valve body 11 and the lower end of the filling pipe 2 are removed, and the filling pipe 2 is connected with the filling pipe of the middle section of the tunnel. At the same time, the check valve body and the guide cone sleeve can be cleaned of mud and sand and can be reused.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A grouting head, characterized in that: The invention comprises a check valve body (11), the outer wall of the check valve body (11) is also sleeved with a horizontally arranged ring plate (111), the inner side of the ring plate (111) is connected and fixed to the check valve body (11), the check valve body (11) has a feed interface (1121) and a discharge port (1122), the feed interface (1121) is located above the ring plate (111), the discharge port (1122) is located below the ring plate (111), and the ring plate (111) is used to The check valve body (11) is connected to the lower end of the filling pipe (2) and the lower end of the filling pipe (2) is blocked, and the feed interface (1121) is used to communicate with the lower end of the grouting pipe (3); the check valve body (11) comprises a shell (112), a valve core (113) and an elastic member (114); the shell (112) is hollow inside, the feed interface (1121) is located in the middle of the upper end of the shell (112), the discharge port (1122) is located at the lower end or the side wall of the shell (112), and the feed interface (1121) is connected to the lower end of the filling pipe (2) and the lower end of the filling pipe (2) is blocked, and the feed interface (1121) is used to communicate with the lower end of the grouting pipe (3); the check valve body (11) comprises a shell (112), a valve core (113) and an elastic member (114); the shell (112) is hollow inside, the feed interface (1121) is located in the middle of the upper end of the shell (112), the discharge port (1122) is located at the lower end or the side wall of the shell (112), and the feed interface The valve core (113) is disposed in the housing (112). The valve core (113) is provided in the housing (112). The elastic member (114) is installed in the housing (112) and is located below the valve core (113). The lower end of the elastic member (114) is against the housing (112), and the upper end of the elastic member (114) is in contact with the housing (112). The lower ends of the valve core (113) are abutted against each other, and the elastic member (114) is used to apply elastic tension to the valve core (113) so that the valve core (113) blocks the feed interface (1121), or the valve core (113) overcomes the elastic tension of the elastic member (114) under the action of the material pressure at the feed interface (1121) to squeeze the elastic member (114) downward to connect the feed interface (1121) and the discharge port (1122); the elastic member (114) is a spring;The valve core (113) comprises a slide seat (1131) and a valve block (1132). The slide seat (1131) is horizontally slidably arranged in the housing (112). A through hole (11311) is provided in the middle thereof and passes through the slide seat up and down. The upper end of the slide seat (1131) is located at the edge of the through hole (11311) and is evenly spaced and protrudes upward. A plurality of support blocks (11312) are provided. The valve block (1132) is mounted on the plurality of support blocks (11312). The valve block (1132) is located directly below the feed interface (1121). The upper end of the elastic member (114) is against the slide seat (1131). The slide seat (1131) is located on the elastic member (114). The valve block (1132) is driven to move upwards to block the feed interface (1121) under the elastic tension of the elastic member (114), or the valve block (1132) overcomes the elastic tension of the elastic member (114) under the action of the material pressure at the feed interface (1121) to drive the slide seat (1131) to move downwards, and opens the feed interface (1121) so that the feed interface (1121) is connected with the discharge port (1122), and / or connected through the through hole (11311) on the slide seat (1131); the valve block (1132) is spherical, and the valve block (1132) rests on the upper ends of the plurality of support blocks (11312). ; 2. The grouting head according to claim 1, characterized in that: The invention also comprises a straight tube-shaped and vertically arranged connector (12), the lower end of the connector (12) extends into the feed interface (1121), and the two are in sealed contact, and a plurality of pin holes (11211) are arranged at intervals along the annular direction on the side wall of the feed interface (1121), and a plurality of limit grooves (121) corresponding to the pin holes (11211) are recessed on the outer side wall of the connector (12), and each of the pin holes (11211) is in contact with the corresponding The limiting grooves (121) are aligned, a pin column (122) is fixedly installed in each limiting groove (121), and one end of each pin column (122) located in the feed interface (1121) extends into the corresponding limiting groove (121), and a plurality of pin columns (122) limit the connecting head (12) on the feed interface (1121), and the upper end of the connecting head (12) is used to connect and communicate with the lower end of the grouting pipe (3).

3. The grouting head according to claim 2, characterized in that: It also includes a straight tube-shaped guide cone sleeve (13) vertically arranged at the upper end of the check valve body, the guide cone sleeve (13) is sleeved outside the connecting head, and an annular gap is formed between the connecting head (12) and the inside of the guide cone sleeve (13), the lower end of the guide cone sleeve (13) is connected to the connecting head (12), the upper end of the guide cone sleeve (13) protrudes from the upper end of the connecting head (12), and the part of the inner hole of the guide cone sleeve (13) located above the connecting head (12) is trumpet-shaped. The guide cone sleeve (13) is used to guide the lower end of the grouting pipe (3) to be aligned with the upper end of the connecting head (12), and extend into the gap so that the lower end of the grouting pipe (3) is sleeved on the upper end of the connecting head (12).

4. A grouting system, characterized in that: It comprises a filling pipe (2), a grouting pipe (3) and a grouting head (1) as claimed in claim 3, wherein the lower end of the filling pipe (2) is connected to the ring plate (111), and the ring plate (111) blocks the lower end of the filling pipe (2), and the outer diameter of the grouting pipe (3) is smaller than the inner diameter of the filling pipe (2), the grouting pipe (3) is sleeved in the filling pipe (2), and the lower end thereof is connected to the feed interface (1121), the filling pipe (2) is used to be placed in a borehole (4), and the lower end thereof extends to the bottom of the borehole near the borehole (4), and the upper ends of the filling pipe (2) and the grouting pipe (3) are both extended to pass through the outside of the borehole (4).

5. A grouting method using the grouting system according to claim 4, characterized in that: The steps include: Step 1: Drilling a well using a drilling rig (4); Step 2: After the drilling (4) is completed, the grouting head (1) is installed below the filling pipe (2), and the filling pipe (2) is sunk into the drilling (4), and the space between the drilling (4) and the filling pipe (2) is filled with mud; Step 3: sinking the grouting pipe (3) into the filling pipe (2), and allowing the lower end of the grouting pipe (3) to extend into the guide cone sleeve (13), and to be connected and communicated with the upper end of the connector (12), pouring cement slurry from the upper end of the grouting pipe (3), and allowing the cement slurry to be discharged into the wellbore (4) through the discharge port (1122) of the check valve body (11), so as to squeeze out the mud in the wellbore (4) outside the filling pipe (2) through the wellhead of the wellbore (4); Step 4: After the mud in the well (4) is drained, wait until the cement slurry in the well (4) solidifies, pull the grouting pipe (3) upward to break the pin (122) between the connector (12) and the feed interface (1121), and disconnect the connector (12) from the feed interface (1121) to remove the grouting pipe (3) from the filling pipe (2), thereby completing the grouting of the filling pipe (2) and fixing the filling pipe (2) in the well (4).

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