Drilling machine supporting device, drilling machine system and TBM

Abstract

The utility model belongs to the field of drilling machine supporting devices, and particularly provides a drilling machine supporting device, a drilling machine system and a TBM. The drilling machine supporting device comprises a base and a drilling machine mounting seat, a first-stage rotating mechanism, a lifting mechanism and a second-stage rotating mechanism are connected between the base and the drilling machine mounting seat in series, and the first-stage rotating mechanism comprises a first-stage rotating seat rotationally mounted on the base and a first-stage rotating drive for driving the first-stage rotating seat to rotate. The first-stage revolving bed is provided with a supporting section with a set axial span, the two axial ends of the supporting section are rotationally installed on the base through rotating shafts, and the lifting mechanism is installed on the radial side of the rotating axis of the first-stage revolving bed. The drilling machine system and the TBM each comprise the drilling machine supporting device. When an anchor rod is drilled and driven, counter-acting force is transmitted to the first-stage rotary seat in the radial direction through the lifting seat and is borne by the first-stage rotary seat, the stability and strength of the first-stage rotary seat are high, the first-stage rotary seat is prevented from being used under severe working conditions for a long time, and the reliability of the drilling machine supporting device is improved.

Description

Technical Field

[0001] This utility model belongs to the field of drilling rig support devices, and in particular relates to a drilling rig support device, a drilling rig system and a TBM. Background Technology

[0002] Rock bolt support is a method of reinforcing surrounding rock to maintain the stability of tunnels. Its core is to utilize the synergistic effect of rock bolts and surrounding rock to form a stable structure capable of withstanding loads. TBMs (Tunnel Boring Machines) are usually equipped with rock bolt drilling rigs to drill rock bolts into the rock face behind the shield, completing the support in a timely manner.

[0003] To expand the drilling range of single-unit anchor bolt drilling rigs and reduce support blind spots, multi-degree-of-freedom anchor bolt drilling rigs have begun to appear in the prior art. For example, invention patent application CN113565435A discloses a multi-degree-of-freedom anchor bolt drilling rig system for full-face hard rock tunnel boring machines. In this drilling system, the anchor bolt drilling rig (vertical drilling rig) is installed on a drilling rig support device with multiple degrees of freedom. Specifically, the drilling rig support device includes a drilling rig tower (i.e., base), a sliding beam rotary reducer (i.e., primary rotary mechanism) is installed on the drilling rig tower, the output end of the sliding beam rotary reducer is connected to a sliding beam, a liftable drilling rig rear axle seat (i.e., lifting seat) is installed on the sliding beam, and a drilling rig rotary reducer (i.e., secondary rotary mechanism) is installed on the drilling rig rear axle seat. The output end of the drilling rig rotary reducer is connected to the anchor bolt drilling rig.

[0004] The aforementioned patent application provides a drilling rig support device with a series of rotary-lifting-rotating multi-degree-of-freedom joints, capable of moving the anchor drilling rig in different directions and achieving multi-degree-of-freedom movement. However, in this patent application, the liftable rear axle of the drilling rig is mounted at one end of a sliding beam rotary reducer, and the rear axle of the drilling rig and the drilling tower are supported only by the sliding beam rotary reducer. However, in hard rock formations, the reaction force during the drilling of anchor bolts is extremely large, and this reaction force acting on the sliding beam rotary reducer can easily damage it. In other words, the drilling rig support device disclosed in the aforementioned patent application suffers from insufficient structural stability and reliability. Utility Model Content

[0005] The purpose of this invention is to provide a drilling rig support device to solve the technical problem of insufficient structural stability and reliability of existing multi-degree-of-freedom drilling rig support devices. Another purpose of this invention is to provide a drilling rig system to solve the same technical problem. A further purpose of this invention is to provide a TBM (Tunnel Boring Machine) to solve the same technical problem.

[0006] To achieve the above objectives, the technical solution of the drilling rig support device provided by this utility model is as follows:

[0007] A drilling rig support device includes a base and a drilling rig mounting base. The drilling rig mounting base has a drilling rig mounting position for installing an anchor drilling rig. A primary slewing mechanism, a lifting mechanism, and a secondary slewing mechanism are connected in series between the base and the drilling rig mounting base. The primary slewing mechanism includes a primary slewing seat rotatably mounted on the base and a primary slewing drive for driving the primary slewing seat to rotate. The primary slewing seat has a support section with a set axial span. The two ends of the support section are rotatably mounted on the base via a rotating shaft. The lifting mechanism is installed on the radial side of the rotation axis of the primary slewing seat.

[0008] As a further improvement, the first-stage rotary seat includes two end plates arranged at intervals along the rotation axis and a seat plate connected to the two end plates. The two end plates are rotatably mounted on the base via a rotating shaft, and the end plates and seat plate together constitute the support section with the set axial span.

[0009] As a further improvement, the base is provided with two support plates arranged at intervals along the rotation axis of the first-stage rotary seat. The distance between the two end plates of the first-stage rotary seat is not less than the distance between the two opposite end faces of the two support plates, so that the first-stage rotary seat is installed on the outside of the two support plates.

[0010] As a further improvement, the lifting mechanism includes a lifting seat and a lifting drive that drives the lifting seat to rise and fall, with a secondary rotary mechanism installed on the side of the lifting seat near the primary rotary drive.

[0011] As a further improvement, a counterweight is installed at the end of the primary rotary seat that is away from the lifting seat.

[0012] As a further improvement, the lifting mechanism includes a lifting seat and a lifting drive that drives the lifting seat to move up and down. The lifting drive is a scissor-type drive structure.

[0013] As a further improvement, a guide column is provided on the first-stage rotary seat, and the lifting seat and the guide column are coordinated for lifting and guiding.

[0014] As a further improvement, at least three guide columns are provided, and one end of each guide column is connected to the first-stage rotary seat, and the other end is connected to form a whole through a connector.

[0015] This utility model is an improved invention, and its beneficial effects are as follows: An anchor drilling rig can still be installed on the drilling rig mounting base in this utility model, and the multi-degree-of-freedom movement of the anchor drilling rig is achieved through a series of two-stage rotary mechanisms and a lifting mechanism, thereby ensuring that the anchor drilling rig can cover a larger anchor bolting area. Unlike existing technologies, in this utility model, the first-stage rotary seat is rotatably mounted on the base via its axially spanning support section. Simultaneously, the lifting mechanism is installed on the radial side of the first-stage rotary seat's rotation axis. During the anchor bolt drilling process, the reaction force acts radially on the first-stage rotary seat through the lifting seat and is transmitted to the base through the support section. The first-stage rotary drive does not directly bear this reaction force, thus improving the structural strength and reliability of the first-stage rotary seat and the first-stage rotary drive.

[0016] To achieve the above objectives, the technical solution of the drilling rig system provided by this utility model is as follows:

[0017] A drilling system includes an anchor bolt drilling rig mounted on a drilling rig support device. The drilling rig support device includes a base and a drilling rig mounting base. The drilling rig mounting base has a drilling rig mounting position for mounting the anchor bolt drilling rig. A primary slewing mechanism, a lifting mechanism, and a secondary slewing mechanism are connected in series between the base and the drilling rig mounting base. The primary slewing mechanism includes a primary slewing seat rotatably mounted on the base and a primary slewing drive for driving the primary slewing seat to rotate. The primary slewing seat has a support section with a set axial span. The axial ends of the support section are rotatably mounted on the base via a rotating shaft. The lifting mechanism is installed on the radial side of the rotation axis of the primary slewing seat.

[0018] As a further improvement, the first-stage rotary seat includes two end plates arranged at intervals along the rotation axis and a seat plate connected to the two end plates. The two end plates are rotatably mounted on the base via a rotating shaft, and the end plates and seat plate together constitute the support section with the set axial span.

[0019] As a further improvement, the base is provided with two support plates arranged at intervals along the rotation axis of the first-stage rotary seat. The distance between the two end plates of the first-stage rotary seat is not less than the distance between the two opposite end faces of the two support plates, so that the first-stage rotary seat is installed on the outside of the two support plates.

[0020] As a further improvement, the lifting mechanism includes a lifting seat and a lifting drive that drives the lifting seat to rise and fall, with a secondary rotary mechanism installed on the side of the lifting seat near the primary rotary drive.

[0021] As a further improvement, a counterweight is installed at the end of the primary rotary seat that is away from the lifting seat.

[0022] As a further improvement, the lifting mechanism includes a lifting seat and a lifting drive that drives the lifting seat to move up and down. The lifting drive is a scissor-type drive structure.

[0023] As a further improvement, a guide column is provided on the first-stage rotary seat, and the lifting seat and the guide column are coordinated for lifting and guiding.

[0024] As a further improvement, at least three guide columns are provided, and one end of each guide column is connected to the first-stage rotary seat, and the other end is connected to form a whole through a connector.

[0025] This utility model is an improved invention, and its beneficial effects are as follows: In this utility model, the multi-degree-of-freedom movement of the anchor bolt drilling rig can still be achieved through the two-stage rotary mechanism and lifting mechanism connected in series on the drilling rig support device, thereby ensuring that the anchor bolt drilling rig can cover a larger anchor bolting area. Unlike existing technologies, in this utility model, the first-stage rotary seat is rotatably mounted on the base through its axially spanned support section. Simultaneously, the lifting mechanism is installed on the radial side of the first-stage rotary seat's rotation axis. During the anchor bolt drilling process, the reaction force acts radially on the first-stage rotary seat through the lifting seat and is transmitted to the base through the support section. The first-stage rotary drive does not directly bear this reaction force, thus improving the structural strength and reliability of the first-stage rotary seat and the first-stage rotary drive.

[0026] To achieve the above objectives, the technical solution for the TBM provided by this utility model is as follows:

[0027] A TBM includes a main unit and a supporting unit. The main unit and / or the supporting unit are equipped with a drilling system. The drilling system includes an anchor drilling rig, which is mounted on a drilling support device. The drilling support device includes a base and a drilling rig mounting base. The drilling rig mounting base has a drilling rig mounting position for mounting the anchor drilling rig. A primary slewing mechanism, a lifting mechanism, and a secondary slewing mechanism are connected in series between the base and the drilling rig mounting base. The primary slewing mechanism includes a primary slewing seat rotatably mounted on the base and a primary slewing drive for driving the primary slewing seat to rotate. The primary slewing seat has a support section with a set axial span. The two ends of the support section are rotatably mounted on the base via a rotating shaft. The lifting mechanism is installed on one radial side of the rotation axis of the primary slewing seat.

[0028] As a further improvement, the first-stage rotary seat includes two end plates arranged at intervals along the rotation axis and a seat plate connected to the two end plates. The two end plates are rotatably mounted on the base via a rotating shaft, and the end plates and seat plate together constitute the support section with the set axial span.

[0029] As a further improvement, the base is provided with two support plates arranged at intervals along the rotation axis of the first-stage rotary seat. The distance between the two end plates of the first-stage rotary seat is not less than the distance between the two opposite end faces of the two support plates, so that the first-stage rotary seat is installed on the outside of the two support plates.

[0030] As a further improvement, the lifting mechanism includes a lifting seat and a lifting drive that drives the lifting seat to rise and fall, with a secondary rotary mechanism installed on the side of the lifting seat near the primary rotary drive.

[0031] As a further improvement, a counterweight is installed at the end of the primary rotary seat that is away from the lifting seat.

[0032] As a further improvement, the lifting mechanism includes a lifting seat and a lifting drive that drives the lifting seat to move up and down. The lifting drive is a scissor-type drive structure.

[0033] As a further improvement, a guide column is provided on the first-stage rotary seat, and the lifting seat and the guide column are coordinated for lifting and guiding.

[0034] As a further improvement, at least three guide columns are provided, and one end of each guide column is connected to the first-stage rotary seat, and the other end is connected to form a whole through a connector.

[0035] This utility model is an improved invention, and its beneficial effects are as follows: In this utility model, the multi-degree-of-freedom movement of the anchor bolt drilling rig can still be achieved through the two-stage rotary mechanism and lifting mechanism connected in series on the drilling rig support device, thereby ensuring that the anchor bolt drilling rig can cover a larger anchor bolting area. Unlike existing technologies, in this utility model, the first-stage rotary seat is rotatably mounted on the base through its axially spanned support section. Simultaneously, the lifting mechanism is installed on the radial side of the first-stage rotary seat's rotation axis. During the anchor bolt drilling process, the reaction force acts radially on the first-stage rotary seat through the lifting seat and is transmitted to the base through the support section. The first-stage rotary drive does not directly bear this reaction force, thus improving the structural strength and reliability of the first-stage rotary seat and the first-stage rotary drive. Attached Figure Description

[0036] Figure 1 This is a schematic diagram from one perspective of an embodiment of the drilling rig system of this utility model installed on a TBM;

[0037] Figure 2 This is a schematic diagram from another perspective of an embodiment of the drilling system of this utility model installed on a TBM;

[0038] Figure 3 This is a structural schematic diagram of an embodiment of the drilling rig system in this utility model.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Base; 2. First-stage slewing seat; 3. First-stage slewing drive; 4. Scissor lift drive structure; 5. Lifting seat; 6. Second-stage slewing mechanism; 7. Anchor bolt drilling rig; 8. Guide column; 9. Connecting plate; 10. Counterweight; 101. Support plate; 201. End plate; 202. Seat plate; 100. Equipment bridge. Detailed Implementation

[0041] The basic technical concept of this utility model is to change the arrangement of the primary rotary seat and the lifting seat. Specifically, the primary rotary seat is mounted on the base through the rotating shafts at both ends, and the lifting seat is mounted on the radial side of the rotation axis of the primary rotary seat. In this way, the primary drive that drives the primary rotary seat to rotate will not directly bear the reaction force of the anchor drilling rig. This part of the reaction force is transmitted radially to the primary rotary seat through the lifting seat and is borne by the primary rotary seat. The primary rotary seat has high stability and strength, avoiding the primary rotary drive from being used in harsh working conditions for a long time and improving the reliability of the drilling rig support device.

[0042] Based on the above concept, the present invention will be further described in detail below with reference to the embodiments.

[0043] Specific embodiments of the drilling system provided by this utility model:

[0044] As a basic implementation example, such as Figures 1-3 As shown, the drilling system provided in this embodiment includes an anchor drilling rig 7 and a drilling support device for mounting and supporting the anchor drilling rig 7. The entire system can be mounted on a TBM, such as on the equipment bridge 100 or connecting bridge of the TBM. During construction, anchor drilling operations are performed on the tunnel walls according to actual needs. The structure and operating principle of the anchor drilling rig 7 are consistent with the prior art and will not be described in detail here. The following mainly focuses on explaining in detail the features and performance of the drilling support device.

[0045] The drilling rig support device includes a base 1, which serves as the mounting foundation, allowing the entire drilling system to be mounted on the equipment bridge 100. The drilling rig support device also includes a drilling rig mounting base, which serves as the mounting foundation for the anchor drilling rig 7, and has mounting positions for the anchor drilling rig 7. To ensure that the anchor drilling rig 7 can move to cover a larger support area, a primary rotation mechanism, a lifting mechanism, and a secondary rotation mechanism 6 are connected in series between the base 1 and the drilling rig mounting base. This means that the anchor drilling rig 7 has a rotation-lifting-rotation degree of freedom, and its orientation can be changed by controlling these mechanisms to cover different drilling locations.

[0046] Unlike existing technologies, such as Figure 3 As shown, the primary rotary mechanism includes a primary rotary seat 2, which is rotatably mounted on the base 1. The primary rotary mechanism also includes a primary rotary drive 3 that drives the primary rotary seat 2 to rotate. The primary rotary drive 3 can specifically adopt a worm gear reducer in the prior art. The primary rotary seat 2 has a set axial span to ensure that the primary rotary seat 2 has sufficient support strength. That is, the primary rotary seat 2 has a support section with a set axial span. The two ends of the support section are rotatably mounted on the base 1 through a rotating shaft. Bearings can be installed on the rotating shaft according to actual needs.

[0047] The lifting mechanism, naturally, includes a lifting seat 5 and a lifting drive that moves the lifting seat 5 up and down. Here, "lifting" refers to relative lifting, that is, the lifting seat 5 moves up and down relative to the primary rotary seat 2. The lifting seat 5 is installed on one radial side of the primary rotary seat 2.

[0048] Based on the above structure, in this embodiment, during construction, the reaction force from the anchor drilling rig 7 mainly acts radially on the first-stage rotary seat 2 through the lifting seat 5. The first-stage rotary seat 2 is supported by the rotating shafts at both ends of the support section, which has strong stability. At this time, the first-stage rotary drive 3 does not directly bear the eccentric load, which improves the structural strength and reliability of the first-stage rotary seat 2 and the first-stage rotary drive 3.

[0049] Specifically, such as Figure 3 As shown, the primary rotary seat 2 is basically an inverted U-shaped structure, comprising two end plates 201 spaced apart along the rotation axis and a seat plate 202 connected to the two end plates 201. The two end plates 201 are rotatably mounted on the base 1 via a rotating shaft. That is, the span formed by the interval between the two end plates 201 is the axial span, and the combination of the two end plates 201 and the seat plate 202 constitutes the support section with the axial span. Compared with a "solid" or box-shaped rotary seat, this inverted U-shaped primary rotary seat 2 is lighter in weight and easier to manufacture while ensuring sufficient strength.

[0050] Furthermore, such as Figure 3 As shown, the base 1 has two support plates 101, which are also arranged at intervals along the rotation axis of the primary rotary seat 2. The distance between the two end plates 201 is not less than the distance between the two opposite end faces of the two support plates 101. That is, the two end plates 201 can be fastened to the outside of the two support plates 101, thereby allowing the primary rotary seat 2 to be installed on the outside of the two support plates 101. Similarly, compared with the "solid" or box-shaped structure of the base 1, the base 1 has a simpler and lighter structure, making it easier to install, while still satisfying the "inverted" installation of the primary rotary seat 2.

[0051] It should be noted here that those skilled in the art will understand that in other embodiments, the first-stage rotary seat 2 can also adopt a "solid" structure. In this case, a rotating shaft is set at both ends of the rotation axis of the first-stage rotary seat 2 and is locked inside the two support plates 101. The "solid" structure in this case constitutes a support section with a set axial span.

[0052] Furthermore, in some alternative embodiments, such as Figure 3As shown, the secondary rotary mechanism 6 is installed on the side of the lifting seat 5 near the primary rotary drive 3. Specifically, the secondary rotary mechanism 6 can also be a worm gear reducer, as is common in the art. A drilling rig mounting base is installed at the output end of this worm gear reducer, and the anchor drilling rig 7 is mounted on the drilling rig mounting base. In this case, the secondary rotary mechanism 6 and the primary rotary drive 3 are actually installed on the same side, which shortens the axial distance between the primary rotary drive 3 and the secondary rotary mechanism 6, thereby shortening the off-center load arm and further improving the force distribution on the primary rotary drive 3.

[0053] Furthermore, in some optional embodiments, a counterweight 10 is also installed at the end of the primary rotary seat 2 facing away from the lifting seat 5. This allows the primary rotary seat 2 to achieve a dynamic balance, further improving the force on the primary rotary drive 3. Specifically, the counterweight 10 can be an arc-shaped counterweight block as shown in the figure, ensuring that the counterweight 10 has a large weight without affecting the normal rotation of the primary rotary seat 2.

[0054] It should be emphasized that the above-mentioned installation position of the secondary rotary mechanism 6 and the setting of the counterweight 10 are all optimizations and improvements on the basic embodiment. The key of this utility model still lies in the structure of the primary rotary seat 2 and the installation method of the lifting mechanism.

[0055] Furthermore, in some optional embodiments, the lifting mechanism employs a lifting drive such as... Figure 3 The scissor drive structure 4 shown is a prior art technology, and can be driven by a hydraulic cylinder or an electric cylinder. Using the scissor drive structure 4 can amplify the stroke of the hydraulic cylinder or electric cylinder, allowing the anchor drilling rig 7 to have a larger range of movement and cover a larger drilling area within a relatively compact size.

[0056] More preferably, in some embodiments, such as Figure 3 As shown, the primary rotary seat 2 is also equipped with a guide post 8, which guides the lifting seat 5. That is, the lifting seat 5 has a guide hole that guides the guide post 8. The shapes of the guide post 8 and the guide hole are not specifically limited, as long as they are mutually compatible and guiding. By setting the guide post 8, in this preferred embodiment, the eccentric load acting on the lifting seat 5 can be mainly borne by the guide post 8, improving the force distribution of the lifting drive and further enhancing the reliability of the drilling rig support device.

[0057] Furthermore, in some optional implementations, such as Figure 3 As shown, more than three guide pillars 8 can be provided, for example, four guide pillars 8 are provided as shown in the figure. One end of each guide pillar 8 is connected to the first-stage rotary seat 2, and the other end is connected to form a whole through a connector. The connector can be, for example, as shown in the figure. Figure 3The connecting component shown is a plate-like structure, namely the connecting plate 9. Of course, it can also be a column-like or block-like connecting component. In this case, multiple guide columns 8 together fit into a column-like structure with higher strength, resulting in a stronger overall load-bearing capacity.

[0058] However, it should be noted that in some cases, the space for installing the anchor drilling rig 7 is limited. In such cases, the guide column 8 may not be necessary to ensure the normal installation of the drilling rig support device.

[0059] Specific embodiments of the drilling rig support device provided by this utility model:

[0060] The embodiment of the drilling rig support device is the drilling rig support device described in the embodiment of the drilling rig system above, and will not be described in detail here.

[0061] Specific embodiments of the TBM provided by this utility model:

[0062] The TBM is generally consistent with existing technologies, namely, it includes a main unit and supporting equipment. The main unit includes a cutterhead, shield, propulsion cylinders, etc., while the supporting equipment includes equipment bridges, supporting trailers, etc. According to actual needs, a drilling rig system can be set at the corresponding positions of the main unit and / or supporting equipment. The structure of the drilling rig system is consistent with the above-described drilling rig system embodiments, and will not be described in detail here.

[0063] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A drilling rig support device, comprising a base and a drilling rig mounting base, wherein the drilling rig mounting base is provided with a drilling rig mounting position for mounting an anchor drilling rig, and a primary slewing mechanism, a lifting mechanism, and a secondary slewing mechanism are connected in series between the base and the drilling rig mounting base, characterized in that, The primary rotary mechanism includes a primary rotary seat rotatably mounted on a base and a primary rotary drive that drives the primary rotary seat to rotate. The primary rotary seat has a support section with a set axial span. The two ends of the support section are rotatably mounted on the base via a rotating shaft. The lifting mechanism is installed on the radial side of the rotation axis of the primary rotary seat.

2. The drilling rig support device according to claim 1, characterized in that, The first-stage rotary seat includes two end plates arranged at intervals along the rotation axis and a seat plate connected to the two end plates. The two end plates are rotatably mounted on the base via a rotating shaft, and the end plates and seat plate together constitute the support section with the set axial span.

3. The drilling rig support device according to claim 2, characterized in that, The base is provided with two support plates arranged at intervals along the rotation axis of the first-stage rotary seat. The distance between the two end plates of the first-stage rotary seat is not less than the distance between the two opposite end faces of the two support plates, so that the first-stage rotary seat is installed on the outside of the two support plates.

4. The drilling rig support device according to any one of claims 1-3, characterized in that, The lifting mechanism includes a lifting seat and a lifting drive that drives the lifting seat to move up and down. The secondary rotary mechanism is installed on the side of the lifting seat near the primary rotary drive.

5. The drilling rig support device according to claim 4, characterized in that, A counterweight is installed at the end of the primary rotary table that is away from the lifting table.

6. The drilling rig support device according to any one of claims 1-3, characterized in that, The lifting mechanism includes a lifting seat and a lifting drive that drives the lifting seat to move up and down. The lifting drive is a scissor-type drive structure.

7. The drilling rig support device according to claim 6, characterized in that, The primary rotary seat is equipped with guide columns, and the lifting seat and guide columns work together for lifting and guiding.

8. The drilling rig support device according to claim 7, characterized in that, There are at least three guide columns, and one end of each guide column is connected to the first-stage rotary seat, and the other end is connected to form a whole through a connector.

9. A drilling rig system, comprising an anchor drilling rig mounted on a drilling rig support device, characterized in that, The drilling rig support device is the drilling rig support device as described in any one of claims 1-8.

10. A TBM comprising a main unit and aftermarket accessories, characterized in that, The main unit and / or the downstream equipment are equipped with the drilling system as described in claim 9.

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