Hydraulic support with self-resetting mechanism

Abstract

The hydraulic support with the self-resetting mechanism comprises a base, a telescopic stand column arranged on the base and a top beam connected to the top of the telescopic stand column, side face main rib plates are arranged on the two sides of the top beam, a stand column ball head is arranged on the top of the telescopic stand column, the self-resetting mechanism is arranged in the top beam, and the self-resetting mechanism is arranged on the top beam. A spherical hinge is formed between the stand column ball head and the self-resetting mechanism. The self-resetting mechanism comprises a stand column limiting block connected with the side face main rib plate through a pin shaft, a rubber block is arranged on the top of the stand column limiting block, a spring is arranged in the stand column limiting block, one end of the spring abuts against the side face main rib plate, and the other end of the spring abuts against the stand column ball head. The hydraulic support with the self-resetting mechanism can improve the roof contact effect of the support, improve the stress condition of the support and prolong the service life of the support.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic supports, in particular to a hydraulic support with a self-resetting mechanism. Background Art

[0002] Due to the ever-changing roof conditions of underground coal mine tunnels, the roof of the tunnel is often uneven. As a result, when hydraulic supports are used in the tunnel, the support top beam is usually horizontal. When the tunnel roof is uneven, the support top beam will deflect. When the top beam is not under stress, the top beam needs to be able to automatically return to the right position. Currently, the existing self-resetting mechanisms that can achieve automatic top beam reset mostly use rubber blocks for reset. That is, when the top beam is not under stress, the rubber block begins to rebound due to compression and deformation, driving the top beam to automatically level. This method relies on the elasticity of the rubber block to achieve reset. In actual application, the elastic force is small and cannot completely pull the top beam back to the horizontal state, resulting in unsatisfactory self-reset effect.

[0003] The invention patent with authorization announcement number CN109026091B discloses an advanced hydraulic support with a rotatable and self-resetting top beam, as well as its installation method and support process. The main structure of the support includes a base, a column, a top beam, a column-base fixing clip, and a rotatable and self-resetting mechanism for the top beam. The base includes a base body, a left column pressure block, and a right column pressure block. The column includes a column cylinder, a telescopic rod body, and a column ball head. The top beam includes a top beam body, a column socket, a limit plate for the rotatable and self-resetting mechanism for the top beam, a fixing pin hole for the rotatable and self-resetting mechanism for the top beam, and a pin shaft fixing slot. The rotatable and self-resetting mechanism for the top beam includes a column ball head limit ring and a reset elastic washer. This advanced hydraulic support with a rotatable and self-resetting top beam can achieve large-angle rotation of the support top beam to adapt to the conditions of the tunnel roof, and the top beam posture can automatically reset after the support is lowered. It can effectively solve the problems of existing advanced hydraulic supports such as poor connection effect with the tunnel roof, low support efficiency, and the susceptibility of top beam pin shaft breakage and top beam falling. However, this device still has the defect of small resetting elastic force. Utility Model Content

[0004] In order to improve the support top connection effect, improve the support stress condition, and extend the service life of the support, the technical solution adopted by the utility model is: a hydraulic support with a self-resetting mechanism, comprising a base, a telescopic column arranged on the base, and a top beam connected to the top of the telescopic column; side main ribs are provided on both sides of the top beam, a column ball head is provided on the top of the telescopic column, a self-resetting mechanism is provided inside the top beam, and a ball hinge is formed between the column ball head and the self-resetting mechanism;

[0005] The self-resetting mechanism includes a column limit block connected to the side main rib plate through a pin shaft, a rubber block is provided on the top of the column limit block, and a spring is provided inside the column limit block. One end of the spring abuts against the side main rib plate, and the other end of the spring abuts against the column ball head.

[0006] Based on the above, in order to limit the degree of freedom of the column limit block, two pairs of pins are provided at the lower portion of the column limit block, and the column limit block is connected to the side main ribs through the two pairs of pins.

[0007] Based on the above, to minimize roof beam deflection, the springs are positioned along the width of the beam. Specifically, when the beam deflects laterally, it compresses the springs on the sides. This compression generates a reaction force, keeping the beam's deflection angle to 15 degrees or less, effectively reducing beam deflection. Once the beam is free from the tunnel roof, the springs automatically return it to its original position.

[0008] Based on the above, in order to utilize the rubber block for buffering, the rubber block is located at the upper end of the column ball head.

[0009] Based on the above, the rubber block is a polyurethane rubber block.

[0010] Based on the above, two telescopic columns are provided on the base, two self-resetting mechanisms are provided inside the top beam, and each telescopic column is respectively connected to a ball hinge of one of the self-resetting mechanisms.

[0011] Based on the above, the two self-resetting mechanisms are symmetrically arranged with the center line of the top beam as the symmetry axis. That is, the height difference between the two telescopic columns can be used to adjust the swing angle of the top beam along the length direction.

[0012] The present invention has substantial features and progress compared to the prior art. Specifically, the present invention provides a hydraulic support with a self-resetting mechanism, which uses a spring instead of a rubber block, and places the spring inside the column limit block. One side of the spring presses against the column ball head, and the other side presses against the side main rib of the top beam, so that when the top beam deflects, the spring is squeezed to produce a reaction force, which reduces its deflection to a certain extent. When the top beam is not under force, the spring rebounds and drives the top beam to automatically level. At the same time, by adding polyurethane rubber to the top of the column head, the polyurethane rubber can play a certain buffering role during the process of the top beam being stressed. On the other hand, fixing one side of the column limit block by two pins can reduce the degree of freedom of the column limit block, reduce its deflection, and make the fixing effect more reliable. Therefore, the hydraulic support with a self-resetting mechanism can improve the support top connection effect, improve the support stress condition, and increase the service life of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a hydraulic support with a self-resetting mechanism provided by the utility model.

[0014] Figure 2 It is a schematic diagram of the partial structure of a hydraulic support with a self-resetting mechanism provided by the utility model.

[0015] Figure 3 The utility model is a schematic structural diagram of a hydraulic support with a self-resetting mechanism provided by the utility model in a deflected state.

[0016] In the figure: 1. Base; 2. Telescopic column; 3. Spring; 4. Column limit block; 5. Rubber block; 6. Column ball head; 7. Pin shaft; 8. Top beam; 9. Side main rib plate. DETAILED DESCRIPTION

[0017] The technical solution of the present utility model is further described in detail below through specific implementation methods.

[0018] Example 1

[0019] This embodiment provides a hydraulic support with a self-resetting mechanism, such as Figure 1 、 Figure 2 、 Figure 3 As shown, the telescopic support structure comprises a base 1, a telescopic column 2 mounted on the base 1, and a top beam 8 connected to the top of the telescopic column 2. Side main ribs 9 are provided on either side of the top beam 8. A column ball head 6 is provided on the top of the telescopic column 2. A self-resetting mechanism is provided within the top beam 8. A ball hinge is formed between the column ball head 6 and the self-resetting mechanism.

[0020] Specifically, if Figure 2 and Figure 3 As shown, the self-resetting mechanism includes a column stopper 4 connected to the side main rib 9 via a pin 7, and a rubber block 5 is provided on the top of the column stopper 4. A spring 3 is provided inside the column stopper 4, one end of which abuts against the side main rib 9, and the other end of which abuts against the column ball head 6.

[0021] In this embodiment, in order to limit the degree of freedom of the column limit block 4 , two pairs of pins 7 are provided at the lower portion of the column limit block 4 , and the column limit block 4 is connected to the side main rib 9 .

[0022] Specifically, the base 1 is provided with two telescopic columns 2, and the top beam 8 is internally provided with two self-reset mechanisms. Each telescopic column 2 is connected to a ball hinge with one of the self-reset mechanisms. The two self-reset mechanisms are symmetrically arranged with the centerline of the top beam 8 as the axis of symmetry. In other words, the height difference between the two telescopic columns can be used to adjust the swing angle of the top beam along its length.

[0023] Example 2

[0024] This embodiment provides a hydraulic support with a self-resetting mechanism. The main difference from Embodiment 1 is that in this embodiment: in order to reduce the deflection degree of the top beam, the spring 3 is arranged along the width direction of the top beam 8.

[0025] Example 3

[0026] This embodiment provides a hydraulic support with a self-resetting mechanism. The main difference from the first embodiment is that in this embodiment, in order to utilize a rubber block for cushioning, the rubber block 5 is located above the column ball head 6. Preferably, the rubber block 5 is made of high-quality, high-strength polyurethane rubber.

[0027] Specifically, the hydraulic support with a self-resetting mechanism provided by the utility model adjusts the swing angle of the top beam along the length direction by adjusting the height difference between the two telescopic columns. Then, the top beam contacts the tunnel roof. Since the top beam is hinged to the telescopic columns, the top beam will adapt to the inclination angle of the tunnel roof along the width direction, and deflection will occur along the width direction of the top beam. When the top beam deflects laterally, it will squeeze the spring on the side. The spring is squeezed and generates a reaction force, which controls the deflection angle of the top beam to less than or equal to 15 degrees, thereby effectively reducing the degree of top beam deflection. When the top beam is separated from the tunnel roof, the top beam will automatically reset under the action of the spring.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. A hydraulic support with a self-resetting mechanism, comprising a base, a telescopic column disposed on the base, and a top beam connected to the top of the telescopic column, characterized in that: Side main ribs are provided on both sides of the top beam, a column ball head is provided on the top of the telescopic column, a self-resetting mechanism is provided inside the top beam, and a ball hinge is formed between the column ball head and the self-resetting mechanism; The self-resetting mechanism includes a column limit block connected to the side main rib plate through a pin shaft, a rubber block is provided on the top of the column limit block, and a spring is provided inside the column limit block. One end of the spring abuts against the side main rib plate, and the other end of the spring abuts against the column ball head.

2. The hydraulic support with a self-resetting mechanism according to claim 1, characterized in that: Two pairs of pins are provided at the lower portion of the column limiting block, and the column limiting block is connected to the side main rib plate through the two pairs of pins.

3. The hydraulic support with a self-resetting mechanism according to claim 1 or 2, characterized in that: The spring is arranged along the width direction of the top beam.

4. The hydraulic support with a self-resetting mechanism according to claim 1, characterized in that: The rubber block is located at the upper end of the ball head of the column.

5. The hydraulic support with a self-resetting mechanism according to claim 4, characterized in that: Two telescopic columns are provided on the base, two self-resetting mechanisms are provided inside the top beam, and each of the telescopic columns is respectively connected to a ball hinge of one of the self-resetting mechanisms.

6. The hydraulic support with a self-resetting mechanism according to claim 5, characterized in that: The two self-resetting mechanisms are symmetrically arranged with the center line of the top beam as the symmetry axis.

7. The hydraulic support with a self-resetting mechanism according to claim 1, 2, 4, 5 or 6, characterized in that: The rubber block is a polyurethane rubber block.

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