Pneumatic push rod model hydraulic support and test method

Abstract

The invention relates to the field of coal mining experiment devices, in particular to a hydraulic support of a pneumatic push rod model and a test method.The hydraulic support of the pneumatic push rod model comprises a support base, a connecting rod set is installed at one end of the support base, and the other end of the connecting rod set is fixedly connected with a support shield beam; a support jack is hinged between the support top beam and the support shield beam, a support side protection plate is hinged to the end, away from the support shield beam, of the support top beam, a pneumatic push rod telescopic rod set is hinged between the support top beam and the support base, and pneumatic push rod telescopic rods are communicated with an air source device. A control valve is communicated between the pneumatic push rod telescopic rod set and the air source device, and the air source device is an electric air pump. The support designed by the invention can be quickly assembled, is wide in adaptability and light in weight, and brings great convenience to popularization of tests.

Description

Technical Field

[0001] The invention relates to the field of coal mining experimental devices, and in particular to a pneumatic push rod model hydraulic support and a test method. Background Art

[0002] The law of mine pressure manifestation and the relationship between the support and the surrounding rock in the fully mechanized caving mining face are different from those in the ordinary fully mechanized mining face, especially in the fully mechanized caving mining of extra-thick coal seams. By monitoring the force of the underground pillars, the advance support pressure, the force of the lateral coal pillars and the force of the anchor rods and cables, the law of mine pressure manifestation and the bearing capacity of the support in the top coal caving face can be mastered to a certain extent. In order to master the migration law of the overburden layer and the distribution and transmission characteristics of the mine pressure in detail, it is the first choice to carry out physical similarity simulation experiments of different coal seam occurrence states in the laboratory.

[0003] Most of the bracket models in the prior art are designed with complex structures, which brings many inconveniences to the assembly of the device. Summary of the invention

[0004] The purpose of the present invention is to provide a pneumatic push rod model hydraulic support to solve the above problems. The support designed by the present invention can be quickly assembled, has wide adaptability and is light in weight, which brings great convenience to the promotion of experiments.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A pneumatic push rod model hydraulic support, comprising a support base, a connecting rod group installed at one end of the support base, a support shielding beam fixedly connected to the other end of the connecting rod group, a support top beam hinged at one end of the support shielding beam away from the support base, a support jack hinged between the support top beam and the support shielding beam, a support guard plate hinged at one end of the support top beam away from the support shielding beam, a pneumatic push rod telescopic rod group hinged between the support top beam and the support base, the pneumatic push rod telescopic rod is connected to an air source device, a control valve is connected between the pneumatic push rod telescopic rod group and the air source device, and the air source device is an electric air pump.

[0007] Preferably, the control valve comprises a number one hand-turned valve and a number two hand-turned valve, the number one hand-turned valve is provided with a number one hand-turned valve gear adjustment switch, a number one hand-turned valve first gear, a number one hand-turned valve N gear, a number one hand-turned valve second gear, a number one hand-turned valve A air guide port, a number one hand-turned valve B air guide port, and a number one hand-turned valve main air guide port, the number one hand-turned valve A air guide port is connected to one end of a number one hand-turned valve air guide pipe, and the other end of the number one hand-turned valve air guide pipe is connected to the pneumatic push rod telescopic rod group; the number one hand-turned valve B air guide port is connected to one end of a number one hand-turned valve air guide pipe, and the other end of the number one hand-turned valve air guide pipe is connected to the pneumatic push rod telescopic rod group; the number one hand-turned valve main air guide port is connected to the electric air pump main air guide pipe;

[0008] The No. 2 hand-turn valve is provided with a No. 2 hand-turn valve shift switch, a No. 2 hand-turn valve first gear, a No. 2 hand-turn valve N gear, a No. 2 hand-turn valve second gear, a No. 2 hand-turn valve A air guide port, a No. 2 hand-turn valve B air guide port, and a No. 2 hand-turn valve main air guide port. The No. 2 hand-turn valve A air guide port is connected to one end of the No. 2 hand-turn valve air guide pipe one, and the other end of the No. 2 hand-turn valve air guide pipe one is connected to the pneumatic push rod telescopic rod group; the No. 2 hand-turn valve B air guide port is connected to one end of the No. 2 hand-turn valve air guide pipe two, and the other end of the No. 2 hand-turn valve air guide pipe two is connected to the pneumatic push rod telescopic rod group; the No. 2 hand-turn valve main air guide port is connected to the electric air pump main air guide pipe.

[0009] Preferably, the pneumatic push rod telescopic rod group includes a No. 1 pneumatic push rod telescopic rod and a No. 2 pneumatic push rod telescopic rod, the No. 1 pneumatic push rod telescopic rod is provided with a No. 1 pneumatic push rod air inlet and a No. 1 pneumatic push rod air outlet, the other end of the No. 1 hand-turn valve air guide pipe No. 2 is connected to the No. 1 pneumatic push rod air inlet, and the other end of the No. 1 hand-turn valve air guide pipe No. 1 is connected to the No. 1 pneumatic push rod air outlet;

[0010] The No. 2 pneumatic push rod telescopic rod is provided with a No. 2 pneumatic push rod air inlet and a No. 2 pneumatic push rod air outlet. The other end of the No. 2 hand-turn valve air guide pipe 2 is connected to the No. 2 pneumatic push rod air inlet, and the other end of the No. 2 hand-turn valve air guide pipe 1 is connected to the No. 2 pneumatic push rod air outlet.

[0011] Preferably, the movable end of the No. 1 pneumatic push rod telescopic rod is fixedly connected to the No. 1 pneumatic push rod-top beam hinge joint, the body of the No. 1 pneumatic push rod telescopic rod is fixedly connected to the pneumatic push rod-support base connector, the No. 1 pneumatic push rod-top beam hinge joint is hinged to the support top beam, and the pneumatic push rod-support base connector is hinged to the support base;

[0012] The movable end of the No. 2 pneumatic push rod telescopic rod is fixedly connected to the No. 2 pneumatic push rod-top beam hinge joint, the body of the No. 2 pneumatic push rod telescopic rod is fixedly connected to another pneumatic push rod-support base connector, the No. 2 pneumatic push rod-top beam hinge joint is hinged to the support top beam, and the other pneumatic push rod-support base connector is hinged to the support base.

[0013] Preferably, the connecting rod group includes a first connecting rod group and a second connecting rod group, and the first connecting rod group and the second connecting rod group respectively include a first connecting rod, a second connecting rod, a base plate hinge seat, and a shielding beam hinge seat, one end of the first connecting rod and the second connecting rod are hinged to the base plate hinge seat, and the other end of the first connecting rod and the second connecting rod are hinged to the shielding beam hinge seat, the base plate hinge seat is fixedly connected to the bracket base, and the shielding beam hinge seat is fixedly connected to the bracket shielding beam.

[0014] A test method for a pneumatic push rod model hydraulic support, used to implement the pneumatic push rod model hydraulic support described in the above scheme, comprises the following steps:

[0015] Adjust the control valve to make the pneumatic push rod telescopic rod group in the extended state, and at this time the pneumatic push rod model hydraulic support is in the raised state;

[0016] When the pressure on the top beam of the working face support is too large, the control valve is adjusted to make the pneumatic push rod telescopic rod group stop after being extended, so as to provide a pressure relief state for the upper rock layer;

[0017] When the excavation of the current working face is completed and the frame needs to be moved and advanced, the control valve is adjusted to shrink the pneumatic push rod telescopic rod group, and the pneumatic push rod model hydraulic support is lowered at this time;

[0018] Repeat the above process to achieve the process of lifting, lowering and moving the pneumatic push rod model hydraulic support. The present invention has the following technical effects:

[0019] The geometric design and mechanical structure of the pneumatic push rod model support should fully simulate the working principle of the actual hydraulic support. This includes aspects such as the height adjustment of the support, the distribution of supporting force, the stiffness of the support and the deformation characteristics. The pneumatic system has a simple structure and fast response speed, and can be quickly adjusted and operated, which improves the work efficiency in experiments and practical applications. The pneumatic push rod structural system uses air as the working medium, which avoids the oil leakage and fire risks that may be caused by the hydraulic system and improves safety. In actual use, the hydraulic support needs to respond quickly to changes in the external environment (such as roof settlement, stratum movement, etc.). The pneumatic push rod model should have good dynamic response capabilities, especially fast thrust adjustment and reaction time. In the simulation test, the support can quickly respond to load changes and make adjustments, which will help to improve the freshness of the model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a structural diagram of the pneumatic support power equipment of the present invention;

[0022] Figure 2 This is a structural diagram of a No. 1 hand-turn valve of the present invention;

[0023] Figure 3 This is a structural diagram of the No. 2 hand-turn valve of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of a pneumatic push rod No. 1 of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the second pneumatic push rod of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the pneumatic push rod model support base of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the protective beam of the pneumatic push rod model support of the present invention;

[0028] Figure 8 It is a schematic structural diagram of the guard plate component of the pneumatic push rod model support of the present invention;

[0029] Fig. 9 It is a schematic diagram of the complete installation structure of the model bracket of the pneumatic push rod of the present invention;

[0030] Fig.10 It is a schematic diagram of the three-dimensional structure of the model support of the pneumatic push rod of the present invention;

[0031] Among them, 1. Main air pipe of electric air pump; 2. Shift switch of hand-turned valve No. 1; 3. 1st gear of hand-turned valve No. 1; 4. Shift N of hand-turned valve No. 1; 5. 2nd gear of hand-turned valve No. 1; 6. Air inlet of hand-turned valve A; 7. Air pipe 1 of hand-turned valve No. 1; 8. Air inlet of hand-turned valve B; 9. Air pipe 2 of hand-turned valve No. 1; 10. Main air inlet of hand-turned valve No. 1; 11. Shift switch of hand-turned valve No. 2; 12. 1st gear of hand-turned valve No. 2; 13. Shift N of hand-turned valve No. 2; 14. 2nd gear of hand-turned valve No. 2; 15. Air inlet of hand-turned valve A; 16. Air pipe 1 of hand-turned valve No. 2; 17. Air inlet of hand-turned valve B; 18. Rotary valve air guide pipe No. 2; 19. Main air inlet of manual rotary valve No. 2; 20. Air inlet of pneumatic push rod No. 1; 21. Air outlet of pneumatic push rod No. 1; 22. Telescopic rod of pneumatic push rod No. 1; 24. Air inlet of pneumatic push rod No. 2; 25. Air outlet of pneumatic push rod No. 2; 26. Telescopic rod of pneumatic push rod No. 2; 27. First connecting rod; 28. Second connecting rod; 29. ​​Bottom plate hinge seat; 30. Cover beam hinge seat; 54. Pneumatic push rod No. 1-top beam hinge joint; 56. Pneumatic push rod No. 2-top beam hinge joint; 160. Bracket top beam; 170. Bracket protective beam; 180. Bracket base; 190. Bracket guard plate; 200. Bracket jack. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Embodiment 1:

[0035] Reference Figures 1 to 10 The embodiment shown provides a pneumatic push rod model hydraulic support, including a support base 180, a connecting rod group is installed at one end of the support base 180, and the other end of the connecting rod group is fixedly connected to a support shielding beam 170, the end of the support shielding beam 170 away from the support base 180 is hinged with a support top beam 160, a support jack 200 is hinged between the support top beam 160 and the support shielding beam 170, and the end of the support top beam 160 away from the support shielding beam 170 is hinged with a support guard plate 190, a pneumatic push rod telescopic rod group is hinged between the support top beam 160 and the support base 180, the pneumatic push rod telescopic rod 13 is connected to an air source device, a control valve is connected between the pneumatic push rod telescopic rod group and the air source device, and the air source device is an electric air pump.

[0036] Further optimization scheme, the control valve includes a No. 1 hand-turn valve and a No. 2 hand-turn valve, the No. 1 hand-turn valve is provided with a No. 1 hand-turn valve gear adjustment switch 2, a No. 1 hand-turn valve first gear 3, a No. 1 hand-turn valve N gear 4, a No. 1 hand-turn valve second gear 5, a No. 1 hand-turn valve A air guide port 6, a No. 1 hand-turn valve B air guide port 8, and a No. 1 hand-turn valve main air guide port 10, the No. 1 hand-turn valve A air guide port 6 is connected to one end of a No. 1 hand-turn valve air guide pipe 7, and the other end of the No. 1 hand-turn valve air guide pipe 7 is connected to the pneumatic push rod telescopic rod group; the No. 1 hand-turn valve B air guide port 8 is connected to one end of a No. 1 hand-turn valve air guide pipe 2 9, and the other end of the No. 1 hand-turn valve air guide pipe 2 9 is connected to the pneumatic push rod telescopic rod group; the No. 1 hand-turn valve main air guide port 10 is connected to the electric air pump main air guide pipe 1;

[0037] The No. 2 hand-turn valve is provided with a No. 2 hand-turn valve shift switch 11, a No. 2 hand-turn valve first gear 12, a No. 2 hand-turn valve N gear 13, a No. 2 hand-turn valve second gear 14, a No. 2 hand-turn valve A air guide port 15, a No. 2 hand-turn valve B air guide port 170, and a No. 2 hand-turn valve main air guide port 190. The No. 2 hand-turn valve A air guide port 15 is connected to one end of the No. 2 hand-turn valve air guide pipe 1 160, and the other end of the No. 2 hand-turn valve air guide pipe 1 160 is connected to the pneumatic push rod telescopic rod group; the No. 2 hand-turn valve B air guide port 170 is connected to one end of the No. 2 hand-turn valve air guide pipe 2 180, and the other end of the No. 2 hand-turn valve air guide pipe 2 180 is connected to the pneumatic push rod telescopic rod group; the No. 2 hand-turn valve main air guide port 190 is connected to the electric air pump main air guide pipe 1.

[0038] Further optimizing the scheme, the pneumatic push rod telescopic rod group includes a No. 1 pneumatic push rod telescopic rod 22 and a No. 2 pneumatic push rod telescopic rod 26, the No. 1 pneumatic push rod telescopic rod 22 is provided with a No. 1 pneumatic push rod air inlet 200 and a No. 1 pneumatic push rod air outlet 21, the other end of the No. 1 hand-turn valve air guide pipe 29 is connected to the No. 1 pneumatic push rod air inlet 200, and the other end of the No. 1 hand-turn valve air guide pipe 17 is connected to the No. 1 pneumatic push rod air outlet 21;

[0039] The No. 2 pneumatic push rod telescopic rod 26 is provided with a No. 2 pneumatic push rod air inlet 24 and a No. 2 pneumatic push rod air outlet 25. The other end of the No. 2 hand-turn valve air guide pipe 1 180 is connected to the No. 2 pneumatic push rod air inlet 24, and the other end of the No. 2 hand-turn valve air guide pipe 1 160 is connected to the No. 2 pneumatic push rod air outlet 25.

[0040] Further optimizing the scheme, the movable end of the No. 1 pneumatic push rod telescopic rod 22 is fixedly connected to the No. 1 pneumatic push rod-top beam hinge joint 54, the body of the No. 1 pneumatic push rod telescopic rod 22 is fixedly connected to the pneumatic push rod-support base connector, the No. 1 pneumatic push rod-top beam hinge joint 54 is hinged to the support top beam 160, and the pneumatic push rod-support base connector is hinged to the support base 180;

[0041] The movable end of the No. 2 pneumatic push rod telescopic rod 26 is fixedly connected to the No. 2 pneumatic push rod-top beam hinge joint 56, and the body of the No. 2 pneumatic push rod telescopic rod 26 is fixedly connected to another pneumatic push rod-bracket base connector. The No. 2 pneumatic push rod-top beam hinge joint 56 is hinged to the bracket top beam 160, and the other pneumatic push rod-bracket base connector is hinged to the bracket base 180.

[0042] A further optimized solution is that the connecting rod group includes a first connecting rod group and a second connecting rod group. The first connecting rod group and the second connecting rod group respectively include a first connecting rod 27, a second connecting rod 28, a base plate hinge seat 29, and a shielding beam hinge seat 30. One end of the first connecting rod 27 and the second connecting rod 28 are hinged to the base plate hinge seat 29, and the other end of the first connecting rod 27 and the second connecting rod 28 are hinged to the shielding beam hinge seat 30. The base plate hinge seat 29 is fixedly connected to the bracket base 180, and the shielding beam hinge seat 30 is fixedly connected to the bracket shielding beam 170.

[0043] A test method for a pneumatic push rod model hydraulic support, used to implement the pneumatic push rod model hydraulic support of the above scheme, comprises the following steps:

[0044] When the coal seam excavation test is carried out in the two-dimensional similar simulation test bench, the electric gas source device needs to be powered on during the advancement of the working face, and the No. 1 hand-turned valve, the No. 1 hand-turned valve shift switch 2 and the No. 2 hand-turned valve shift switch 11 of the No. 1 hand-turned valve are adjusted, and at the same time, they are adjusted to the No. 1 hand-turned valve second gear 5 and the No. 2 hand-turned valve second gear 14, so that the No. 1 pneumatic push rod telescopic rod 22 and the No. 2 pneumatic push rod telescopic rod 26 remain in the extended state. At this time, the pneumatic model hydraulic support is in the lifting state. When the pressure on the top plate of the working face is too large, the pneumatic push rod model hydraulic support needs to give way to it. At this time, the gear position needs to be adjusted to the No. 1 hand-turned valve N gear 4 and the No. 2 hand-turned valve N gear 13, the No. 1 hand-turned valve A air guide port 6, the No. 1 hand-turned valve B air guide port 8, The air inlet 15 of the No. 2 hand-turned valve A and the air inlet 17 of the No. 2 hand-turned valve B are closed, and the No. 1 pneumatic push rod telescopic rod 22 and the No. 2 pneumatic push rod telescopic rod 26 are in the intermediate stop state of the extended holding state, providing a pressure-releasing state for the upper rock formation. When the excavation of the current working face is completed and the frame needs to be moved and advanced, the No. 1 hand-turned valve and the No. 2 hand-turned valve are adjusted to the first gear position 3 of the No. 1 hand-turned valve and the first gear position 12 of the No. 2 hand-turned valve, and the No. 1 pneumatic push rod telescopic rod 22 and the No. 2 pneumatic push rod telescopic rod 26 of the pneumatic model support device are in the retracted state. At this time, the pneumatic push rod model hydraulic support is in the process of lowering the frame, and this process is repeated to realize the test of the entire process of raising, lowering and moving the frame.

[0045] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A pneumatic push rod model hydraulic support, characterized in that: The invention comprises a support base (180), one end of which is provided with a connecting rod group, the other end of which is fixedly connected with a support shielding beam (170), the end of which away from the support base (180) is hinged with a support top beam (160), a support jack (200) is hinged between the support top beam (160) and the support shielding beam (170), the end of which away from the support shielding beam (170) is hinged with a support guard plate (190), a pneumatic push rod telescopic rod group is hinged between the support top beam (160) and the support base (180), the pneumatic push rod telescopic rod (13) is connected with an air source device, a control valve is connected between the pneumatic push rod telescopic rod group and the air source device, and the air source device is an electric air pump.

2. The pneumatic push rod model hydraulic support according to claim 1, characterized in that: The control valve comprises a number one hand-turned valve and a number two hand-turned valve. The number one hand-turned valve is provided with a number one hand-turned valve gear adjustment switch (2), a number one hand-turned valve first gear position (3), a number one hand-turned valve N gear position (4), a number one hand-turned valve second gear position (5), a number one hand-turned valve A air guide port (6), a number one hand-turned valve B air guide port (8), and a number one hand-turned valve main air guide port (10). The number one hand-turned valve A air guide port (6) is connected to one end of a number one hand-turned valve air guide pipe (7), and the other end of the number one hand-turned valve air guide pipe (7) is connected to the pneumatic push rod telescopic rod group; the number one hand-turned valve B air guide port (8) is connected to one end of a number one hand-turned valve air guide pipe (9), and the other end of the number one hand-turned valve air guide pipe (9) is connected to the pneumatic push rod telescopic rod group; the number one hand-turned valve main air guide port (10) is connected to the electric air pump main air guide pipe (1); The second hand-turned valve is provided with a second hand-turned valve gear adjustment switch (11), a second hand-turned valve first gear position (12), a second hand-turned valve N gear position (13), a second hand-turned valve second gear position (14), a second hand-turned valve A air guide port (15), a second hand-turned valve B air guide port (170), and a second hand-turned valve main air guide port (190). The second hand-turned valve A air guide port (15) is connected to a second hand-turned valve air guide pipe 1 (160). One end of the No. 2 hand-turned valve air guide pipe 1 (160) is connected to the pneumatic push rod telescopic rod group at the other end; the No. 2 hand-turned valve B air guide port (170) is connected to one end of the No. 2 hand-turned valve air guide pipe 2 (180), and the other end of the No. 2 hand-turned valve air guide pipe 2 (180) is connected to the pneumatic push rod telescopic rod group; the No. 2 hand-turned valve main air guide port (190) is connected to the electric air pump main air guide pipe (1).

3. The pneumatic push rod model hydraulic support according to claim 2, characterized in that: The pneumatic push rod telescopic rod group comprises a No. 1 pneumatic push rod telescopic rod (22) and a No. 2 pneumatic push rod telescopic rod (26); the No. 1 pneumatic push rod telescopic rod (22) is provided with a No. 1 pneumatic push rod air inlet (200) and a No. 1 pneumatic push rod air outlet (21); the other end of the No. 1 hand-turned valve air guide pipe No. 2 (9) is connected to the No. 1 pneumatic push rod air inlet (200); the other end of the No. 1 hand-turned valve air guide pipe No. 1 (7) is connected to the No. 1 pneumatic push rod air outlet (21); The No. 2 pneumatic push rod telescopic rod (26) is provided with a No. 2 pneumatic push rod air inlet (24) and a No. 2 pneumatic push rod air outlet (25); the other end of the No. 2 hand-turn valve air guide pipe 2 (180) is connected to the No. 2 pneumatic push rod air inlet (24); the other end of the No. 2 hand-turn valve air guide pipe 1 (160) is connected to the No. 2 pneumatic push rod air outlet (25).

4. The pneumatic push rod model hydraulic support according to claim 3, characterized in that: The movable end of the No. 1 pneumatic push rod telescopic rod (22) is fixedly connected to the No. 1 pneumatic push rod-top beam hinge joint (54), the body of the No. 1 pneumatic push rod telescopic rod (22) is fixedly connected to the pneumatic push rod-support base connector, the No. 1 pneumatic push rod-top beam hinge joint (54) is hinged to the support top beam (160), and the pneumatic push rod-support base connector is hinged to the support base (180); The movable end of the No. 2 pneumatic push rod telescopic rod (26) is fixedly connected to the No. 2 pneumatic push rod-top beam hinge joint (56), and the body of the No. 2 pneumatic push rod telescopic rod (26) is fixedly connected to another pneumatic push rod-support base connector, the No. 2 pneumatic push rod-top beam hinge joint (56) is hinged to the support top beam (160), and the other pneumatic push rod-support base connector is hinged to the support base (180).

5. The pneumatic push rod model hydraulic support according to claim 1, characterized in that: The connecting rod group comprises a first connecting rod group and a second connecting rod group, and the first connecting rod group and the second connecting rod group respectively comprise a first connecting rod (27), a second connecting rod (28), a base plate hinge seat (29), and a shielding beam hinge seat (30), one end of the first connecting rod (27) and the second connecting rod (28) are hinged to the base plate hinge seat (29), and the other end of the first connecting rod (27) and the second connecting rod (28) are hinged to the shielding beam hinge seat (30), the base plate hinge seat (29) is fixedly connected to the support base (180), and the shielding beam hinge seat (30) is fixedly connected to the support shielding beam (170).

6. A test method for a pneumatic push rod model hydraulic support, characterized in that: The pneumatic push rod model hydraulic support for implementing any one of claims 1 to 5 comprises the following steps: Adjust the control valve to make the pneumatic push rod telescopic rod group in the extended state, and at this time the pneumatic push rod model hydraulic support is in the raised state; When the pressure of the top beam (160) of the working face support is too large, the control valve is adjusted to make the pneumatic push rod telescopic rod group stop after being extended, so as to provide a pressure relief state for the upper rock layer; When the excavation of the current working face is completed and the frame needs to be moved and advanced, the control valve is adjusted to shrink the pneumatic push rod telescopic rod group, and the pneumatic push rod model hydraulic support is lowered at this time; The above process is repeated to realize the process of raising, lowering and moving the pneumatic push rod model hydraulic support.

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