Folding forepoling device of heading machine

Abstract

The utility model provides a folding forepoling device of a heading machine. The folding forepoling device comprises a pushing groove, a supporting beam and a shield, a pushing groove is formed in the supporting beam, sliding grooves are formed in the two sides of the pushing groove, sliding blocks are arranged on the two sides of the supporting beam and assembled in the sliding grooves, the two ends, away from the supporting beam, of the pushing groove are connected with the two ends of a pushing oil cylinder respectively, a lifting oil cylinder set is further hinged to the supporting beam, and the other end of the lifting oil cylinder set is hinged to the shield. According to the three-section telescopic shield, the supporting area is greatly enlarged, a stable supporting platform is provided for the mine tunneling process, rock collapse, wall caving and other accidents are effectively prevented, the safety of tunneling operation is greatly improved, and a solid safety barrier is provided for operators.

Description

Technical Field

[0001] The utility model relates to a foldable advance supporting device for a tunneling machine. Background Art

[0002] Due to the complex and changeable internal environment of the mine, the influence of factors such as the stress state of the rock mass and hydrological conditions restricts the improvement of the production capacity and advancement speed of the mine's comprehensive excavation working face. The setting of temporary support can effectively maintain the safety of the working environment, prevent safety accidents caused by changes in geological conditions, and improve the efficiency of tunnel excavation.

[0003] The current temporary supports include front-exploring beam structure, column with cross beam and tunnel boring machine-mounted type. The temporary support structure of the front-exploring beam structure is complex, difficult to construct and has high maintenance costs; the temporary support of the column with cross beam structure is simple in structure but weak in support capacity; the tunnel boring machine-mounted type structure has insufficient support force, is prone to instability, and is very dangerous for subsequent work. For example, a tunnel boring and anchoring machine disclosed in publication number CN116658190A has a support mechanism that is almost vertically lifted and lowered at the top of the front end of the tunneling component, and a hydraulic support is provided at the front end of the tunneling head as the front end support point of the support mechanism to ensure that the support mechanism does not affect the balance of the tunneling component during the support process. However, the hydraulic support is arranged at the front end of the tunneling head, which means that the tunnel boring machine must dig out space at its front end before supporting. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a foldable advance support device for a tunnel boring machine.

[0005] The utility model is realized through the following technical solutions.

[0006] The utility model provides a foldable advance support device for a tunnel boring machine, comprising a push groove, a support beam and a shield; slide grooves are arranged on both sides of the push groove, and sliders are arranged on both sides of the support beam, the sliders are assembled in the slide grooves, and the two ends of the push groove and the support beam that are separated are respectively connected to the two ends of the push cylinder, and a lifting cylinder group is also hinged on the support beam, and the other end of the lifting cylinder group is hinged on the shield.

[0007] The lifting cylinder group includes a first supporting cylinder and a second supporting cylinder. The two first supporting cylinders are hinged to both sides of one end of the supporting beam. The other ends of the two first supporting cylinders are hinged to one end of the shield. The second supporting cylinders are hinged to both sides of the supporting beam. The two second supporting cylinders on the same side are parallel to each other and the hinge points are respectively at the two ends of the supporting beam. The other ends of the two second supporting cylinders on the same side are respectively hinged to the middle of the shield and the other end thereof.

[0008] The middle part of the support beam is provided with two middle partitions which are parallel to its center line, and a number of rib plates are evenly arranged on the end surface of the support beam, and the two ends of the rib plate are respectively vertically connected to the slider and the middle partition, and a push plate is also vertically connected between the two middle partitions, and a push seat is installed on the side of the push plate opposite to the push cylinder, and the push seat is hinged to the push rod of the push cylinder, and the second support cylinder hinge seat and the third support cylinder hinge seat which are not on the same straight line are installed on the opposite surfaces of the rib plates near the edges of the two ends of the support beam, and the first support cylinder hinge seat is also installed on the back of the second support cylinder hinge seat.

[0009] The push groove is processed with a plurality of countersunk holes, and the push groove is fixed to the top of the tunneling machine by means of bolts passing through the countersunk holes. The lower end surface of the push groove is also fixedly connected with a plurality of pads.

[0010] The slide groove is an I-beam, and the cross section of the slide block is processed to fit the shape of the groove of the I-beam.

[0011] A U-shaped card is also fixedly connected to the outer side of the slide groove.

[0012] A first extension beam is also installed in the shield, a first extension cylinder is installed in the shield, a push rod of the first extension cylinder is connected to the first extension beam, a second extension beam is installed in the first extension beam, a second extension cylinder is hinged on the lower end surface of the first extension beam, and a push rod of the second extension cylinder is hinged on the lower end of the second extension beam.

[0013] A cylindrical groove with a diameter larger than that of the first extending oil cylinder is processed in the first extending beam, and the end of the push rod of the first extending oil cylinder is fixed at the bottom of the cylindrical groove.

[0014] The beneficial effect of the utility model is that the shield which can be retracted in three stages greatly expands the support area, provides a stable support platform for the mine excavation process, effectively prevents the occurrence of accidents such as rock collapse and rock spalling, greatly enhances the safety of excavation operations, and provides a solid safety barrier for operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the supporting state structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the push groove and support beam structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the push slot structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the utility model in an idle state;

[0019] In the figure: 1-sliding groove, 101-countersunk hole, 102-slide groove, 103-pad, 104-U-shaped card, 2-support beam, 201-middle partition, 202-slider, 203-rib plate, 204-first supporting cylinder hinge seat, 205-second supporting cylinder hinge seat, 206-third supporting cylinder hinge seat, 3-shield, 4-first extending beam, 5-second extending beam, 6-second extending cylinder, 7-first extending cylinder, 8-first supporting cylinder, 9-pad, 10-second supporting cylinder, 11-sliding cylinder, 12-sliding cylinder seat, 13-sliding seat, 14-sliding plate. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0021] A foldable advance support device for a tunnel boring machine includes a sliding groove 1, a support beam 2, and a shield 3; sliding grooves 102 are arranged on both sides of the sliding groove 1, and sliding blocks 202 are arranged on both sides of the support beam 2, and the sliding blocks 202 are assembled in the sliding grooves 102, and the two ends of the sliding groove 1 and the support beam 2 are respectively connected to the two ends of the sliding cylinder 11, and a lifting cylinder group is also hinged on the support beam 2, and the other end of the lifting cylinder group is hinged on the shield 3.

[0022] During support, the push cylinder 11 is filled with fluid to push the push beam 2 out of the push groove 1. After the push cylinder 11 reaches the limit position, it drives the support cylinder group to raise the shield 3, and stops after raising one end. Then, it drives the first extension cylinder and the second extension cylinder to push the first extension beam and the second extension beam out of the shield respectively, and then starts the support cylinder group to contact the top plate as needed, and stops when the hydraulic pressure of the support cylinder reaches the set value. Figure 1 The support is stable, providing workers with enough space to support the anchor net, with a high safety factor. When the support work of this section of the tunnel is completed, the reverse return of the liquid is the return of the oil cylinder in the above support steps. After the support device is recovered, Figure 4 , and the next cycle is repeated in this way.

[0023] Furthermore, the lifting cylinder group includes a first supporting cylinder 8 and a second supporting cylinder 10. The two first supporting cylinders 8 are hinged to both sides of one end of the supporting beam 2. The other ends of the two first supporting cylinders 8 are hinged to one end of the shield 3. The first supporting cylinder 8 supports one end of the shield 3. The second supporting cylinder 10 is hinged to both sides of the supporting beam 2. The two second supporting cylinders 10 on the same side are parallel to each other and the hinge points are respectively at the two ends of the supporting beam 2. The other ends of the two second supporting cylinders 10 on the same side are respectively hinged to the middle part and the other end of the shield 3. One of the two second supporting cylinders 10 on the same side is supported in the middle part of the shield 3, and the other is supported at the other end of the shield 3. The first supporting cylinder 8 and the second supporting cylinder 10 respectively support the two ends and the middle part of the shield 3, ensuring the stability of the support device. The two second supporting cylinders 10 on the same side are cross-supported, so that they can be placed parallel to the supporting beam after recovery.

[0024] Further, such as Figure 2 As shown, two middle partitions 201 are provided in the middle of the support beam 2, both of which are parallel to the center line thereof, and a number of ribs 203 are evenly arranged on the end surface of the support beam 2, and the two ends of the ribs 203 are respectively vertically connected to the slider 202 and the middle partition 201, the ribs 203 increase the rigidity of the support beam 2, and can serve as a supporting component of the support cylinder, and lie flat on the ribs after the support cylinder is retracted to prevent the shield from pressing the support cylinder, and a push plate 14 is also vertically connected between the two middle partitions 201, and a push seat 13 is installed on the side of the push plate 14 opposite to the push cylinder 11, and the push seat 13 is hinged to the push rod of the push cylinder 11, and a second support cylinder hinge seat 205 and a third support cylinder hinge seat 206 which are not in the same straight line are installed on the opposite surfaces of the ribs 203 near the edges of the two ends of the support beam 2, and a first support cylinder hinge seat 204 is also installed on the back of the second support cylinder hinge seat 205.

[0025] like Figure 2 As shown, a plurality of countersunk holes 101 are processed on the push groove 1, and the push groove 1 is fixed to the top of the tunnel boring machine by means of bolts passing through the countersunk holes 101, and a plurality of pads 9 are also fixed to the lower end surface of the push groove 1.

[0026] like Figure 3 As shown, the slide groove 102 is an I-beam, and the cross section of the slider 202 is processed to fit the shape of the groove of the I-beam.

[0027] like Figure 3 As shown, a U-shaped card 104 is fixedly connected to the outer side of the slide groove 102. The outer side of the I-beam of the U-shaped card 104 forms a through groove, which can be used as a wire trough to protect the wires.

[0028] like Figure 1As shown, a first extension beam 4 is also installed in the shield 3, a first extension cylinder 7 is installed in the shield 3, a push rod of the first extension cylinder 7 is connected to the first extension beam 4, a second extension beam 5 is installed in the first extension beam 4, a second extension cylinder 6 is hinged on the lower end surface of the first extension beam 4, and a push rod of the second extension cylinder 6 is hinged on the lower end of the second extension beam 5. The support area of ​​the shield can be adjusted.

[0029] Furthermore, a cylindrical groove with a diameter larger than that of the first extending cylinder 7 is processed in the first extending beam 4, and the end of the push rod of the first extending cylinder 7 is fixed at the bottom of the cylindrical groove. When the first extending beam is recovered, the first extending cylinder 7 can be accommodated in the cylindrical groove, thereby reducing the volume of the shield after recovery.

Claims

1. A foldable advance support device for a roadheader, comprising a push groove (1), a support beam (2), and a shield (3), characterized in that: Slide grooves (102) are arranged on both sides of the push groove (1), and sliding blocks (202) are arranged on both sides of the support beam (2). The sliding blocks (202) are assembled in the slide grooves (102). The two ends of the push groove (1) and the support beam (2) that are separated from each other are respectively connected to the two ends of the push cylinder (11). A lifting cylinder group is also hinged on the support beam (2), and the other end of the lifting cylinder group is hinged on the shield (3).

2. The foldable advance support device for a tunnel boring machine according to claim 1, characterized in that: The lifting cylinder group comprises a first supporting cylinder (8) and a second supporting cylinder (10), the two first supporting cylinders (8) are hinged to both sides of one end of the supporting beam (2), the other ends of the two first supporting cylinders (8) are hinged to one end of the shield (3), and two second supporting cylinders (10) are respectively hinged to both sides of the supporting beam (2), the two second supporting cylinders (10) on the same side are parallel to each other and the hinge points are respectively at the two ends of the supporting beam (2), and the other ends of the two second supporting cylinders (10) on the same side are respectively hinged to the middle of the shield (3) and the other end thereof.

3. The foldable advance support device for a tunnel boring machine according to claim 2, characterized in that: The middle part of the support beam (2) is provided with two intermediate partitions (201) which are parallel to the center line thereof. A plurality of ribs (203) are evenly arranged on the end surface of the support beam (2). The two ends of the ribs (203) are respectively vertically connected to the slider (202) and the intermediate partition (201). A push plate (14) is also vertically connected between the two intermediate partitions (201). A push seat (13) is installed on the side of the push plate (14) opposite to the push cylinder (11). The push seat (13) is hinged to the push rod of the push cylinder (11). A second support cylinder hinge seat (205) and a third support cylinder hinge seat (206) which are not on the same straight line are installed on the opposite surface of the ribs (203) near the two end edges of the support beam (2). The back of the second support cylinder hinge seat (205) is also installed with a first support cylinder hinge seat (204).

4. The foldable advance support device for a tunnel boring machine according to claim 1, characterized in that: The push groove (1) is processed with a plurality of countersunk holes (101), and the push groove (1) is fixed to the top of the tunnel boring machine by means of bolts passing through the countersunk holes (101). The lower end surface of the push groove (1) is also fixedly connected with a plurality of cushion blocks (9).

5. The foldable advance support device for a tunnel boring machine according to claim 1, characterized in that: The slide groove (102) is an I-beam, and the cross section of the slider (202) is processed into a shape that adapts to the groove of the I-beam.

6. The foldable advance support device for a tunnel boring machine according to claim 5, characterized in that: A U-shaped clip (104) is also fixedly connected to the outer side of the slide groove (102).

7. The foldable advance support device for a roadheader according to claim 1, characterized in that: A first extension beam (4) is also installed in the shield (3), a first extension cylinder (7) is installed in the shield (3), a push rod of the first extension cylinder (7) is connected to the first extension beam (4), a second extension beam (5) is installed in the first extension beam (4), a second extension cylinder (6) is hinged on the lower end surface of the first extension beam (4), and a push rod of the second extension cylinder (6) is hinged on the lower end of the second extension beam (5).

8. The foldable advance support device for a roadheader according to claim 7, characterized in that: A cylindrical groove having a diameter greater than that of the first extension cylinder (7) is machined inside the first extension beam (4), and the end of the push rod of the first extension cylinder (7) is fixed to the bottom of the cylindrical groove.

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