A high-efficiency paste-filling template hydraulic support

Abstract

The present invention relates to the field of mine filling operation construction equipment, and specifically discloses a high-efficiency paste filling template hydraulic support, including: a hydraulic support front section and a hydraulic support rear section, the hydraulic support rear section includes a rear top beam and a rear base, the rear top beam and the rear base are respectively detachably connected to the hydraulic support front section, a rear column is arranged between the rear top beam and the rear base, the upper and lower ends of the rear column are respectively detachably connected to the rear top beam and the rear base, a filling space is arranged on the inner side of the rear top beam, and a baffle having the same cross-sectional shape as the rear top beam is arranged on the edge of the rear top beam, and the baffle isolates the filling space on the inner side of the rear top beam. The technical solution of the present invention can increase the isolation speed, improve the filling process, and thus improve the filling coal mining efficiency.

Description

Technical Field

[0001] The invention relates to the field of mine filling operation construction devices, and in particular to a high-efficiency paste filling template hydraulic support. Background Art

[0002] Coal mining under buildings, railways, water bodies and pressurized water bodies is referred to as "three down and one up". The Linxi Mine has serious coal pressure under the "three down and one up". If the mining problem of "three down and one up" cannot be effectively solved (this part of the coal mine is risky and cannot be mined directly), the mine will face the dilemma of resource depletion.

[0003] In response to the problem of severe coal compression in the "three down and one up" area in some coal mines and the loss of a large number of protective coal pillars, the inventor's unit actively planned to build a paste filling project and successfully put into production the first fully mechanized paste filling face in 2018. However, currently, due to the limitations of isolation speed and filling process, the filling efficiency is still not high.

[0004] The main reason is that the rear base part of the formwork support adopts an overall fully enclosed box structure, and its width is consistent with the basic support. When the basic support is filled, the filling area of ​​the longwall filling and mining working face is isolated and divided into units to avoid the phenomenon that the paste flow velocity is reduced due to the filling area being too large, the filling efficiency is reduced due to excessive flow impulse, and the support is easily damaged. For example, the document with Chinese patent publication number CN 109057846 A discloses a hydraulic isolation support for coal mine paste filling mining, wherein four hydraulic support support columns supporting the top beam are arranged between the top beam and the base, and the inclined beam, front connecting rod and rear connecting rod are hinged between the top beam and the base, the tail beam is hinged at the rear end of the top beam, the front beam is hinged at the front end of the top beam, the front beam is embedded with a telescopic beam, and the front of the telescopic beam is hinged to the guard plate; the short beam is hinged at the rear end of the top beam, and the short beam is hinged to the upper isolation plate; the isolation plate tensioning device is hinged at the rear of the base; the middle isolation plate is nested in the upper isolation plate, the lower isolation plate is nested in the middle isolation plate, the lower isolation plate is hinged with the isolation tensioning device, the upper isolation plate has an upper isolation flexible strip at the upper end, and the lower isolation plate has a lower isolation flexible strip at the lower end. The document claims that in filling coal mining, the filling area of ​​the coal mining working face to be sealed is quickly isolated, the work of manually building isolation templates is eliminated, manual labor is reduced, the safety of workers' auxiliary operations is guaranteed, and the production efficiency of filling mining is improved.

[0005] However, the above filling process still requires that each filling unit on the old pond side of the basic support is filled. Only when the support completes coal mining and moves the support, can the old pond side of the template support (the position of the template support of the working face that has completed the filling, which cannot be filled synchronously when filling the mining working face due to the template support) be filled separately. This results in an increase in the number of fillings and a decrease in the filling efficiency. Now there is an urgent need to study a high-efficiency paste filling template hydraulic support to increase the isolation speed, improve the filling process, and thus improve the filling coal mining efficiency. Summary of the invention

[0006] The invention provides a high-efficiency paste filling template hydraulic support, which can increase the isolation speed, improve the filling process, and thus improve the filling coal mining efficiency.

[0007] In order to solve the above technical problems, this application provides the following technical solutions:

[0008] A high-efficiency paste filling template hydraulic support, comprising: a hydraulic support front section and a hydraulic support rear section, the hydraulic support rear section comprising a rear top beam and a rear base, the rear top beam and the rear base are respectively detachably connected to the hydraulic support front section, a rear column is provided between the rear top beam and the rear base, the upper and lower ends of the rear column are respectively detachably connected to the rear top beam and the rear base, a filling space is provided on the inner side of the rear top beam, and a baffle with the same cross-sectional shape as the rear top beam is provided on the edge of the rear top beam, and the baffle isolates the filling space on the inner side of the rear top beam.

[0009] The basic scheme principles and beneficial effects are as follows:

[0010] When in use, the present invention installs one group of basic brackets interspersed with each other in the longwall filling mining working face, which can play a supporting role and also play a role in isolating the filling units. Since the inner side of the rear top beam is provided with a filling space, the edge of the rear top beam is provided with a baffle with the same cross-sectional shape as the rear top beam, and the baffle isolates the filling space on the inner side of the rear top beam. This is equivalent to thinning the rear box of the rear column (from a top view). In this way, the baffle (together with the rear top beam and the rear base) can play a role in unit isolation during the first filling.

[0011] After completing three coal mining steps and the frame pulling operation, the secondary filling (continuous filling) can make the basic support in the middle and the area to be filled (the old pond side during the first filling) of the support penetrate. During filling, the working surface during the secondary filling can be filled together with the area left over when the rear baffle, top beam and rear base were used for unit isolation during the first filling. The separate filling process behind the formwork support can be eliminated. The structural design of the baffle, top beam and rear base is equivalent to adopting a "semi-retaining wall" structural design, which changes the process of separate filling behind the formwork support. Improve filling efficiency and reduce the labor intensity of employees.

[0012] In summary, the present invention achieves the purpose of increasing the isolation speed (avoiding secondary filling) and improving the filling process, thereby improving the filling coal mining efficiency, through the structural design of the baffle, the top beam and the rear base.

[0013] Furthermore, the front section of the hydraulic support includes a top beam, a base, an oblique beam, a front connecting rod and a rear connecting rod. The base pin connects the front connecting rod and the rear connecting rod, the front connecting rod and the rear connecting rod pins connect the oblique beam, and the oblique beam pin connects the top beam. The base, front connecting rod, rear connecting rod and top beam form a four-bar mechanism.

[0014] This design can be more compatible with existing equipment.

[0015] Furthermore, the front section of the hydraulic support includes a column, a push frame and a push jack, the upper end of the column is connected to the top beam, and the lower end of the column is connected to the base; the push jack includes a cylinder bottom and a piston rod, the cylinder bottom of the push jack is connected to the base, and the piston rod is connected to the push frame.

[0016] Furthermore, the rear top beam is detachably connected to the top beam, and the rear base is detachably connected to the base.

[0017] Furthermore, the baffle is hung below the rear top beam.

[0018] Furthermore, the rear base and the baffle plate form a box body, and the cross-sectional shape of the box body is the same as the cross-sectional shape of the rear top beam.

[0019] Further, a filling state detection unit is provided at the tail of the rear top beam, and the filling state detection unit includes a base and a sensing plate, the base is fixedly connected to the tail of the rear top beam, a guide rod is fixedly provided on the sensing plate, and a guide hole for accommodating the guide rod and slidably connected to the guide rod is provided on the base; a magnetic piece is provided on the surface of the sensing plate facing the base, the magnetic piece is fixedly connected to the sensing panel, a coil is provided at a position corresponding to the magnetic piece on the base, an elastic piece for maintaining the distance between the sensing plate and the base is provided between the sensing plate and the base, the two ends of the elastic piece are respectively fixed to the sensing plate and the base, and a strain gauge is fixedly provided on the outer surface of the sensing plate; the coil is connected to the sensing circuit and the power supply circuit at the same time, a switching solenoid valve is provided between the power supply circuit and the sensing circuit, the switching solenoid valve circuit is connected to a controller, and the controller is also connected to the strain gauge and the sensing circuit respectively;

[0020] The controller is used to receive the current information of the strain gauge and the voltage amplitude and frequency information of the induction circuit, and then obtain the deformation variable information of the strain gauge according to the current information of the strain gauge and the preset corresponding relationship between the strain gauge deformation variable and resistance, and then obtain the paste filling height information according to the deformation variable information and the preset corresponding relationship between the deformation variable and the paste filling height; the controller is also used to integrate the voltage amplitude after receiving the voltage amplitude and frequency information of the induction circuit, and obtain the deformation variable verification value of the integral operation result through the preset integral result and deformation variable corresponding relationship; if the deformation variable verification value and the deformation variable information do not exceed the preset range, a normal working instruction is generated; if the deformation variable verification value and the deformation variable information exceed the preset range, a maintenance request instruction is generated; then the frequency information is identified, and after the frequency information is lower than the preset value, an auxiliary filling instruction is generated and sent to the switching solenoid valve, and the switching solenoid valve is also used to switch the coil from being connected to the induction circuit to being connected to the power supply circuit after receiving the auxiliary filling instruction, and switch the coil back to the state of being connected to the induction circuit after maintaining the preset time.

[0021] In specific use, since the working surface (hereinafter referred to as the working surface) during the secondary filling is large, the area left behind when the rear baffle, top beam and rear base are used for unit isolation during the first filling (forming a triangle-like area, referred to as the residual area in the following text) is small, and there are certain problems with the fluidity between the two areas. In order to ensure the filling effect of this part, the filling height is sensed by the induction plate (small force, indicating less filling material), which is convenient for controlling the filling amount (filling amount together with the working surface). Due to the narrow residual area, the filling material will flow in from the connection between the residual area and the working surface when entering, and then flow into the bottom of the residual area and return again (similar to water waves and the reflection of water waves when they meet the boundary), and will slightly hinder the inflow of subsequent filling materials (filling materials are pastes, which are also relatively viscous and have poor fluidity), and this reflux will be converted into frequency information. During normal operation, the frequency information generated by the filling material is stable. When it is lower than the preset value, it is more of a representation that the connection between the residual area and the working surface is blocked at this time. Therefore, the coil pushes the magnetic body to move the induction plate, which makes it easier for the filling material to flow in, avoids filling vacancies caused by the narrow residual area and the obstruction of the connection between the residual area and the working surface, and ensures the filling effect.

[0022] Furthermore, the strain gauge is embedded in the sensing plate.

[0023] It is more convenient to detect the amount of filling material.

[0024] Furthermore, a protective film is provided on the surface of the base and the sensing plate.

[0025] Improve service life.

[0026] Furthermore, the elastic member is a spring.

[0027] The above method is less costly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front view of an embodiment 1 of a high-efficiency paste-filled template hydraulic support;

[0029] Figure 2 It is a top view of Example 1 of a high-efficiency paste-filled template hydraulic support;

[0030] Figure 3 This is a schematic diagram of the first filling process of the existing filling process;

[0031] Figure 4 It is a schematic diagram of secondary filling of the existing filling process;

[0032] Figure 5 This is a schematic diagram of Example 1 when first filled;

[0033] Figure 6 This is a schematic diagram of the second filling of Example 1;

[0034] Figure 7 This is a schematic diagram of the structure of the filling state detection unit in Example 2. DETAILED DESCRIPTION

[0035] The following is further described in detail through specific implementation methods:

[0036] The marks in the drawings of the specification include: top beam 1, base 2, inclined beam 3, front connecting rod 4, rear connecting rod 5, column 6, sliding frame 7, sliding jack 8, rear top beam 9, rear base 10, baffle 11, rear column 12, working surface 20, residual area 30, base 40, induction plate 50, guide rod 51, magnet 52, coil 41, spring 53, strain gauge 54.

[0037] Example 1

[0038] A high-efficiency paste filling template hydraulic support (such as Figure 1 , Figure 2As shown), it includes: a hydraulic support front section and a hydraulic support rear section, the hydraulic support rear section includes a rear top beam 9 and a rear base 10, the rear top beam 9 and the rear base 10 are respectively detachably connected to the hydraulic support front section, a rear column 12 is provided between the rear top beam 9 and the rear base 10, the upper and lower ends of the rear column 12 are respectively detachably connected to the rear top beam 9 and the rear base 10, a filling space is provided on the inner side of the rear top beam 9, and a baffle 11 with the same cross-sectional shape as the rear top beam 9 is provided on the edge of the rear top beam 9, and the baffle 11 isolates the filling space on the inner side of the rear top beam 9. The hydraulic support front section includes a top beam 1, a base 2, an oblique beam 3, a front connecting rod 4 and a rear connecting rod 5, the base 2 is pin-connected to the front connecting rod 4 and the rear connecting rod 5, the front connecting rod 4 and the rear connecting rod 5 are pin-connected to the oblique beam 3, the oblique beam 3 is pin-connected to the top beam 1, and the base 2, the front connecting rod 4, the rear connecting rod 5 and the top beam 1 form a four-bar mechanism. The front section of the hydraulic support includes a column 6, a push frame 7 and a push jack 8. The upper end of the column 6 is connected to the top beam 1, and the lower end of the column 6 is connected to the base 2. The push jack 8 includes a cylinder bottom and a piston rod. The cylinder bottom of the push jack 8 is connected to the base 2, and the piston rod is connected to the push frame 7. The rear top beam 9 is detachably connected to the top beam 1, and the rear base 10 is detachably connected to the base 2. The baffle 11 is suspended below the rear top beam 9. The rear base 10 and the baffle 11 form a box body, and the cross-sectional shape of the box body is the same as the cross-sectional shape of the rear top beam 9.

[0039] When used specifically: the base 2 is pin-connected to the front connecting rod 4 and the rear connecting rod 5, the front connecting rod 4 and the rear connecting rod 5 are pin-connected to the inclined beam 3, and the inclined beam 3 is pin-connected to the top beam 1. The four-link mechanism formed is the stabilizing mechanism of the bracket and enhances the ability of the bracket to resist horizontal force and torsion. The four columns 6 are connected to the top beam 1 by the column heads, and the cylinder bottom is connected to the base 2 to support the stabilizing mechanism of the bracket. The cylinder bottom of the push jack 8 is connected to the base 2, and the piston rod is connected to the push frame 7 to complete the movement of the coal mining machine and the scraper and the forward movement of the bracket. A four-column support hydraulic bracket is formed to ensure the whole process of supporting the top plate of the mining working surface 20 and pushing and pulling the bracket. The rear top beam 9 is pin-connected to the top beam 1, the rear base 10 is pin-connected to the base 2, the column heads of the rear columns 12 are connected to the rear top beam 9, and the cylinder bottoms of the rear columns 12 are connected to the rear base 10. The rear base 10 is used as a fulcrum to support the rear top beam 9, which plays a role in supporting the area to be filled in the old pond and providing a filling operation space. The baffle 11 is hung below the rear top beam 9 to prevent the filling paste from entering the interior of the bracket.

[0040] With the existing filling process, after the filling operation of each filling unit is completed on the old pond side of the basic support, the old pond side of the template support can be filled only after the support has completed coal mining and moved (such as Figure 3 , Figure 4Compared with the example shown in FIG. 1 , in this embodiment, after the rear base 10 box body is thinned to complete three coal mining steps and the frame pulling operation is completed, the middle support and the area to be filled in the template support can be connected. When filling, the arc plate on the lower side of the template support is filled downward, and the triangular area behind the template support is filled together, so that the separate filling process behind the template support can be eliminated ( Figure 5 , Figure 6 Improve filling efficiency and reduce the labor intensity of employees.

[0041] Example 2

[0042] Compared with the embodiment 1, the only difference is that the tail of the rear top beam 9 is provided with a filling state detection unit (such as Figure 7 As shown), the filling state detection unit includes a base 40 and a sensing plate 50, the base 40 is fixedly connected to the rear end of the rear top beam 9 (of course, it can also be connected to the baffle 11 there), a guide rod 51 is fixedly provided on the sensing plate 50, and a guide hole for accommodating the guide rod 51 and slidingly connected to the guide rod 51 is provided on the base 40; a magnet 52 is provided on the surface of the sensing plate 50 facing the base 40, the magnet 52 is fixedly connected to the sensing panel, a coil 41 is provided at a position corresponding to the magnet 52 on the base 40, and the sensing plate 50 and the base 40 are connected. A spring 53 is provided between the two for maintaining the distance between the two, and the two ends of the spring 53 are fixed to the sensing plate 50 and the base 40 respectively. A strain gauge 54 is fixed on the outer surface of the sensing plate 50, and the strain gauge 54 is embedded in the sensing plate 50; the coil 41 is connected to the sensing circuit and the power supply circuit at the same time, and a switching solenoid valve is provided between the power supply circuit and the sensing circuit, and the switching solenoid valve circuit is connected to a controller (a 16-bit single-chip microcomputer with an AD conversion function is selected in this embodiment), and the controller is also connected to the strain gauge 54 and the sensing circuit respectively;

[0043] The controller is used to receive the current information of the strain gauge 54 and the voltage amplitude and frequency information of the induction circuit, and then obtain the deformation information of the strain gauge 54 according to the current information of the strain gauge 54 and the preset corresponding relationship between the deformation and resistance of the strain gauge 54, and then obtain the paste filling height information according to the deformation information and the preset corresponding relationship between the deformation and the paste filling height; the controller is also used to integrate the voltage amplitude after receiving the voltage amplitude and frequency information of the induction circuit, and obtain the deformation verification value of the integral operation result through the preset corresponding relationship between the integral result and the deformation; if the deformation verification value and the deformation information do not exceed the preset range, a normal working instruction is generated; if the deformation verification value and the deformation information exceed the preset range, a maintenance request instruction is generated; then the frequency information is identified, and after the frequency information is lower than the preset value, an auxiliary filling instruction is generated and sent to the switching solenoid valve, and the switching solenoid valve is also used to switch the coil 41 from being connected to the induction circuit to being connected to the power supply circuit after receiving the auxiliary filling instruction, and switch to the state where the coil 41 is connected to the induction circuit again after maintaining the preset time. The surfaces of the base 40 and the sensing plate 50 are provided with a protective film.

[0044] In specific use: during the first filling, the rear baffle 11, the top beam 1 and the rear base 10 are used to isolate the unit, and the working surface 20 and the remaining area 30 are connected during the second filling, and the filling material will flow from the working surface 20 into the remaining area 30. During this process, the induction plate 50 senses the filling height, which is convenient for controlling the filling amount.

[0045] When the filling material enters, it will flow in from the connection between the legacy area 30 and the working surface 20, then flow into the bottom of the legacy area 30 and return again, and will slightly hinder the inflow of subsequent filling materials. This backflow will be converted into frequency information. During normal operation, the frequency information generated by the filling material is stable. When it is lower than the preset value, it is more of a representation that the connection between the legacy area 30 and the working surface 20 is blocked. Therefore, the magnetic body is pushed by the coil 41 to make the induction plate 50 move, which is more convenient for the filling material to flow in, avoiding the filling vacancies caused by the narrowness of the legacy area 30 and the obstruction of the connection between the legacy area 30 and the working surface 20, and ensuring the filling effect.

[0046] The above are only embodiments of the present invention. The invention is not limited to the fields involved in this implementation case. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field to which the invention belongs before the application date or the priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. A high-efficiency paste-filled template hydraulic support, characterized in that: include: A hydraulic support front section and a hydraulic support rear section, wherein the hydraulic support rear section includes a rear top beam and a rear base, wherein the rear top beam and the rear base are respectively detachably connected to the hydraulic support front section, a rear column is arranged between the rear top beam and the rear base, and the upper and lower ends of the rear column are respectively detachably connected to the rear top beam and the rear base, a filling space is arranged on the inner side of the rear top beam, and a baffle having the same cross-sectional shape as that of the rear top beam is arranged on the edge of the rear top beam, wherein the baffle isolates the filling space on the inner side of the rear top beam.

2. The high-efficiency paste-filled template hydraulic support according to claim 1, characterized in that: The front section of the hydraulic support includes a top beam, a base, an oblique beam, a front connecting rod and a rear connecting rod. The base pin connects the front connecting rod and the rear connecting rod, the front connecting rod and the rear connecting rod pin connect the oblique beam, the oblique beam pin connects the top beam, and the base, front connecting rod, rear connecting rod and top beam form a four-bar linkage.

3. The high-efficiency paste-filled template hydraulic support according to claim 2, characterized in that: The front section of the hydraulic support includes a column, a push frame and a push jack, the upper end of the column is connected to the top beam, and the lower end of the column is connected to the base; the push jack includes a cylinder bottom and a piston rod, the cylinder bottom of the push jack is connected to the base, and the piston rod is connected to the push frame.

4. The high-efficiency paste-filled template hydraulic support according to claim 3, characterized in that: The rear top beam is detachably connected to the top beam, and the rear base is detachably connected to the base.

5. The high-efficiency paste-filled template hydraulic support according to claim 4, characterized in that: The baffle is hung below the rear top beam.

6. The high-efficiency paste-filled template hydraulic support according to claim 5, characterized in that: The rear base and the baffle plate form a box body, and the cross-sectional shape of the box body is the same as the cross-sectional shape of the rear top beam.

7. The high-efficiency paste-filled template hydraulic support according to claim 6, characterized in that: A filling state detection unit is provided at the tail of the rear top beam, and the filling state detection unit includes a base and a sensing plate, the base is fixedly connected to the tail of the rear top beam, a guide rod is fixedly provided on the sensing plate, and a guide hole for accommodating the guide rod and slidingly connected to the guide rod is provided on the base; a magnetic piece is provided on the surface of the sensing plate facing the base, the magnetic piece is fixedly connected to the sensing panel, a coil is provided at a position corresponding to the magnetic piece on the base, an elastic piece for maintaining the distance between the sensing plate and the base is provided between the sensing plate and the base, the two ends of the elastic piece are respectively fixed to the sensing plate and the base, and a strain gauge is fixedly provided on the outer surface of the sensing plate; the coil is connected to the sensing circuit and the power supply circuit at the same time, a switching solenoid valve is provided between the power supply circuit and the sensing circuit, the switching solenoid valve circuit is connected to a controller, and the controller is also connected to the strain gauge and the sensing circuit respectively; The controller is used to receive the current information of the strain gauge and the voltage amplitude and frequency information of the induction circuit, and then obtain the deformation information of the strain gauge according to the current information of the strain gauge and the preset corresponding relationship between the strain gauge deformation and resistance, and then obtain the paste filling height information according to the deformation information and the preset corresponding relationship between the deformation and paste filling height; the controller is also used to perform an integral operation on the voltage amplitude after receiving the voltage amplitude and frequency information of the induction circuit, and obtain a deformation verification value by using the integral operation result through the preset corresponding relationship between the integral result and the deformation; If the shape variable verification value and the shape variable information do not exceed the preset range, a normal working instruction is generated; If the deformation variable verification value and the deformation variable information exceed the preset range, a maintenance request instruction is generated; then the frequency information is identified, and after the frequency information is lower than the preset value, an auxiliary filling instruction is generated and sent to the switching solenoid valve. The switching solenoid valve is also used to switch the coil from being connected to the induction circuit to being connected to the power supply circuit after receiving the auxiliary filling instruction, and switch the coil back to being connected to the induction circuit after maintaining the preset time.

8. The high-efficiency paste-filled template hydraulic support according to claim 7, characterized in that: The strain gauge is embedded in the sensing plate.

9. The high-efficiency paste-filled template hydraulic support according to claim 8, characterized in that: The surfaces of the base and the sensing plate are provided with protective films.

10. The high-efficiency paste-filled template hydraulic support according to claim 9, characterized in that: The elastic member is a spring.

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