Transmission line grounding grid excavation device and excavation method thereof

Abstract

The present invention provides a transmission line grounding grid excavation device and an excavation method thereof, belonging to the technical field of grounding excavation devices. The transmission line grounding grid excavation device includes a center rod with an opening at the top and a threaded rod fixed at the bottom; a connecting rod with a threaded hole at the top, and the threaded rod is threadedly connected to the threaded hole; a shovel head is fixed to the bottom of the connecting rod; an extension rod is arranged on the upper side of the center rod; a lifting mechanism is arranged in the center rod and connected to the extension rod to realize its up and down linear movement; in the present invention, through the setting of the drill bit, when the shovel head excavates the soil and encounters relatively hard soil, which is difficult to shovel by manpower, the device can be inverted at this time, so that the drill bit is aimed at the soil, and the servo motor is started to make the drill bit crush and loosen the soil, so that manual labor can easily excavate again through the shovel head, which not only reduces the labor consumption but also improves the excavation efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of grounding excavation devices, and in particular relates to a transmission line grounding grid excavation device and an excavation method thereof. Background Art

[0002] Transmission lines are constructed by using transformers to boost the voltage of generator power before connecting it to the transmission line via control devices such as circuit breakers. Transmission lines are categorized as overhead and cable. Transmission lines are connected to the ground through a grounding grid, and the reliability of the grounding system is crucial for preventing lightning strikes and protecting the safe operation of transmission lines.

[0003] Grounding devices are the most commonly used grounding method in overhead transmission lines. For a long time, their installation has generally been completed manually through the construction process of excavating grounding trenches, laying grounding wires, and backfilling the trenches. Manual excavation devices generally use shovels for excavation. However, existing shovels have a simple structure and can only perform simple excavation. When encountering harder stones, they need to be broken with other tools, which is not only inconvenient to operate, but also delays excavation efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a transmission line grounding grid excavation device and an excavation method thereof, aiming to solve the problem that the excavation shovel in the prior art has a simple structure and can only perform simple excavation. When encountering harder stones, it needs to be crushed with other tools, which is not only inconvenient to operate but also delays excavation efficiency.

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

[0006] A transmission line grounding grid excavation device, comprising:

[0007] a center rod with an open top and a threaded rod fixed to the bottom;

[0008] A connecting rod, a threaded hole is formed on the top of the connecting rod, and the threaded rod is threadedly connected to the threaded hole;

[0009] The shovel head is fixed to the bottom of the connecting rod;

[0010] An extension rod is arranged on the upper side of the central rod;

[0011] A lifting mechanism is provided in the center rod and connected to the extension rod to achieve its up and down linear motion;

[0012] a drill bit mounted on the top of the extension rod; and

[0013] The driving mechanism is connected to the drill bit to realize the rotation of the drill bit to crush the soil.

[0014] As a preferred solution of the present invention, the lifting mechanism includes:

[0015] an adjustment chamber opening into the interior underside of the center rod;

[0016] A screw rod, one end of which is rotatably connected to the bottom wall of the adjustment chamber, and the other end of which movably passes through the bottom wall of the opening of the center rod and extends upward;

[0017] a nut, the threads of which are fitted on the circumferential surface of the extended end of the screw rod;

[0018] An adjusting rod is movably inserted into the central rod, the top of the adjusting rod is fixed to the bottom of the extension rod, and the nut is fixed to the inner wall of the circumference of the adjusting rod;

[0019] A limit assembly connected to the adjusting rod to enable the adjusting rod to move linearly;

[0020] An adjusting assembly connected to the screw rod to enable the screw rod to rotate;

[0021] The locking assembly is connected to the adjusting assembly to fix the adjusting assembly.

[0022] As a preferred solution of the present invention, the limiting component includes:

[0023] A plurality of limit blocks, wherein the limit blocks are all fixed to the circumferential surface of the adjusting rod;

[0024] A plurality of limiting grooves, each of which is formed on the inner surface of the opening of the center rod, wherein the height of the limiting groove is greater than the height of the limiting block;

[0025] The plurality of limit blocks are respectively slidably connected in the plurality of limit slots.

[0026] As a preferred solution of the present invention, the adjustment component includes:

[0027] an adjusting port, which is formed on the circumferential surface of the central rod and communicates with the adjusting chamber;

[0028] A small gear is rotatably connected between the upper and lower inner walls of the regulating port via a rotating shaft;

[0029] A large gear is fixed to the circumferential surface of the screw rod in the adjustment chamber;

[0030] The small gear is meshed with the large gear.

[0031] As a preferred solution of the present invention, the locking assembly includes:

[0032] There are multiple jacks, which are evenly distributed on the top of the large gear;

[0033] A plug rod movably plugged into one of the sockets;

[0034] A fixed block, which is fixed to the top of the insertion rod;

[0035] a spring, one end of which is fixed to the top of the fixed block and the other end of which is fixed to the top wall of the regulating chamber;

[0036] A slide groove is provided on the circumferential surface of the center rod and communicates with the adjustment chamber;

[0037] The slider is T-shaped, and one end of the slider is inserted into the slide groove and fixed to the fixed block.

[0038] As a preferred solution of the present invention, a telescopic rod is provided in the spring, and the upper and lower ends of the telescopic rod are respectively fixed to the top wall of the adjustment chamber and the top of the fixed block.

[0039] As a preferred solution of the present invention, the driving mechanism includes:

[0040] a motor slot, which is provided on the circumferential surface of the extension rod;

[0041] An inspection door, which is hinged to the opening of the motor slot;

[0042] The servo motor is fixed to the bottom wall of the motor slot, and the output end of the servo motor movably passes through the top of the extension rod and is fixed to the drill bit.

[0043] As a preferred solution of the present invention, the top of the extension rod is threadedly connected to a protective sleeve, and the protective sleeve is sleeved on the outside of the drill bit.

[0044] As a preferred solution of the present invention, the circumferential surfaces of the center rod and the extension rod are respectively provided with a lower handle groove and an upper handle groove, two fixing rods are fixed to the upper part of the circumferential surface of the extension rod, and the circumferential surface of the connecting rod is provided with scale lines.

[0045] A method for excavating a transmission line grounding grid excavation device, comprising the following steps:

[0046] S1. When excavating the soil, the worker holds the center rod and the extension rod and excavates the soil with the shovel head;

[0047] S2. When encountering hard soil and the shovel head cannot break the soil, the protective sleeve is removed, the device is turned upside down, the drill bit is aimed at the soil, and the servo motor is started. The output shaft of the servo motor drives the drill bit to rotate, and the soil is broken by the drill bit to loosen the soil;

[0048] S3. Then turn off the servo motor, thread the protective sleeve onto the extension rod, and start excavation again using the shovel head.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] 1. In this solution, through the setting of the drill bit, when the shovel head is excavating the soil, if it encounters relatively hard soil that is difficult to shovel by manpower, the device can be inverted at this time, so that the drill bit is aimed at the soil, and the servo motor is started to make the drill bit break and loosen the soil, so that manual labor can be used to easily excavate again through the shovel head, which not only reduces the labor consumption but also improves the excavation efficiency.

[0051] 2. In this solution, the lifting mechanism is provided to make the distance between the center rod and the extension rod longer, so that the length of the device can be adjusted, which can be suitable for people with different arm lengths, making the device more convenient to use.

[0052] 3. In this solution, a protective sleeve is provided. When the drill bit is not in use, the protective sleeve is threaded onto the extension rod to protect the drill bit. At the same time, it can effectively prevent the staff from touching it and causing damage. When using the drill bit, the protective sleeve can be unscrewed. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0054] Figure 1 This is a first-perspective stereogram in the present invention;

[0055] Figure 2 This is the first-perspective exploded view of the present invention;

[0056] Figure 3 For the present invention Figure 2 A partial enlarged view of point A in the middle;

[0057] Figure 4 For the present invention Figure 2 A partial enlarged view of point B in the middle;

[0058] Figure 5 This is the second perspective exploded view of the present invention;

[0059] Figure 6 It is a sectional perspective view of the present invention;

[0060] Figure 7 This is a three-dimensional diagram of the center rod and the connecting rod in the present invention after being disassembled;

[0061] Figure 8 This is a three-dimensional view of the protective sleeve after it is opened in the present invention.

[0062] In the picture:

[0063] 1. Center rod; 101. Lower handle slot; 102. Threaded rod; 2. Connecting rod; 21. Threaded hole; 22. Scale line; 3. Shovel head; 4. Extension rod; 41. Upper handle slot; 42. Adjustment rod; 421. Limit block; 43. Fixing rod; 5. Motor slot; 51. Inspection door; 6. Servo motor; 61. Drill bit; 611. Protective sleeve; 7. Adjustment port; 71. Small gear; 72. Large gear; 8. Adjustment chamber; 81. Screw; 82. Nut; 9. Jack; 91. Insert rod; 92. Fixing block; 93. Slider; 94. Spring; 941. Telescopic rod; 95. Slide slot. DETAILED DESCRIPTION

[0064] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the described embodiments are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0065] Example 1

[0066] See also Figure 1-8 , the present invention provides the following technical solutions:

[0067] A transmission line grounding grid excavation device, comprising:

[0068] The center rod 1 has an opening at the top and a threaded rod 102 fixed at the bottom;

[0069] The connecting rod 2 has a threaded hole 21 on its top, and the threaded rod 102 is threadedly connected to the threaded hole 21;

[0070] The shovel head 3 is fixed to the bottom of the connecting rod 2;

[0071] The extension rod 4 is arranged on the upper side of the central rod 1;

[0072] A lifting mechanism is provided in the center rod 1 and is connected to the extension rod 4 to achieve its up and down linear motion;

[0073] A drill bit 61 is provided on the top of the extension rod 4; and

[0074] The driving mechanism is connected to the drill bit 61 to enable the drill bit 61 to rotate and crush the soil.

[0075] Specifically, the lifting mechanism includes:

[0076] an adjustment chamber 8 , which opens into the inner underside of the central rod 1 ;

[0077] A screw rod 81, one end of which is rotatably connected to the bottom wall of the adjustment chamber 8, and the other end of which is movable through the bottom wall of the opening of the center rod 1 and extends upward;

[0078] a nut 82, whose threads are engaged with the circumferential surface of the extended end of the screw rod 81;

[0079] The adjusting rod 42 is movably inserted into the center rod 1, the top of the adjusting rod 42 is fixed to the bottom of the extension rod 4, and the nut 82 is fixed to the inner wall of the circumference of the adjusting rod 42;

[0080] A limit assembly connected to the adjustment rod 42 to enable the adjustment rod 42 to move linearly;

[0081] An adjusting assembly connected to the screw rod 81 to enable the screw rod 81 to rotate;

[0082] The locking assembly is connected to the adjusting assembly to fix the adjusting assembly.

[0083] In a specific embodiment of the present invention, the center rod 1 is threadedly connected to the connecting rod 2 through the threaded rod 102, so that the connecting rod 2 can be disassembled. Since the shovel head 3 and the connecting rod 2 are fixed, the shovel head 3 can be disassembled and replaced, and is convenient to carry. At the same time, the surface of the connecting rod 2 is engraved with scale lines 22, and the data length of the scale measurement has included the length of the shovel head 3. Therefore, the bottom of the shovel head 3 is placed against the bottom of the soil pit. By observing the scale lines 22, the excavation depth can be clearly seen, making excavation more convenient and not easy to excavate too much or too little, resulting in unnecessary time and labor consumption; the center rod 1 and the extension rod 4 are adjusted in length by a price-raising mechanism, so that the center rod 1 and the extension rod 4 are The distance between them can be adjusted. The screw rod 81 is driven to rotate by the adjusting assembly, so that the screw rod 81 can drive the nut 82 to move. Due to the action of the limit assembly, the position of the nut 82 is limited, so that the nut 82 moves linearly, driving the adjusting rod 42 to move, and the adjusting rod 42 drives the extension rod 4 to move up and down, thereby adjusting the distance between the extension rod 4 and the center rod 1. When the shovel head 3 is excavating the soil, if it encounters relatively hard soil and it is difficult to shovel by manpower, the device can be inverted at this time so that the drill bit 61 is aimed at the soil, and the drill bit 61 is driven to rotate by the driving mechanism so that the drill bit 61 breaks and loosens the soil, so that the manual excavation can be easily carried out again by the shovel head 3, which not only reduces the labor consumption but also improves the excavation efficiency. When in use, the connecting rod 2 can be unscrewed so that the shovel head 3 will not interfere with the construction workers using the drill bit 61, making it convenient to use the drill bit 61.

[0084] Specifically, the limit components include:

[0085] A plurality of limit blocks 421 , each of which is fixed to the circumferential surface of the adjustment rod 42 ;

[0086] Multiple limiting grooves, all of which are formed on the inner surface of the opening of the center rod 1, and the height of the limiting grooves is greater than the height of the limiting block 421;

[0087] The plurality of limiting blocks 421 are slidably connected to the plurality of limiting grooves respectively.

[0088] In this embodiment: when the nut 82 drives the adjusting rod 42 to move, the adjusting rod 42 drives the limit block 421 to slide in the limit groove, so that the position of the adjusting rod 42 is limited and can only move in a straight line and drive the extension rod 4 to move. The limit groove is opened on the inner surface of the opening of the center rod 1 and does not pass through the top of the center rod 1. The height of the limit block 421 is less than the height of the limit groove, so that the limit block 421 can fully slide in the limit groove without leaving the limit groove.

[0089] Specifically, the adjustment components include:

[0090] an adjustment port 7 formed on the circumferential surface of the center rod 1 and communicating with the adjustment chamber 8;

[0091] The pinion 71 is rotatably connected between the upper and lower inner walls of the regulating port 7 via a rotating shaft;

[0092] The large gear 72 is fixed to the circumferential surface of the screw rod 81 located in the adjustment chamber 8;

[0093] The small gear 71 meshes with the large gear 72 .

[0094] Specifically, the locking assembly includes:

[0095] There are multiple jacks 9, which are evenly distributed on the top of the large gear 72;

[0096] An insert rod 91 is movably inserted into one of the insertion holes 9;

[0097] A fixing block 92 fixed to the top of the insertion rod 91;

[0098] a spring 94 , one end of which is fixed to the top of the fixing block 92 and the other end is fixed to the top wall of the regulating chamber 8 ;

[0099] A chute 95 is formed on the circumferential surface of the center rod 1 and communicates with the adjustment chamber 8;

[0100] The slider 93 is T-shaped, and one end of the slider 93 is inserted into the slide groove 95 and fixed to the fixing block 92 .

[0101] In this embodiment, the adjusting assembly is used in conjunction with the locking assembly. When the screw rod 81 is driven to rotate, the pinion 71 is rotated to make the pinion 71 rotate in the adjusting port 7. The pinion 71 is meshed with the large gear 72, so that the pinion 71 drives the large gear 72 to rotate, and the large gear 72 drives the screw rod 81 to rotate. By rotating the pinion 71 forward and reversely, the screw rod 81 is rotated forward and reversely, so that the nut 82 moves upward or downward. When rotating the pinion 71, the slider 93 in the locking assembly needs to be pushed upward. The slider 93 When the cam 92 is in the state of being moved upward, the cam 92 is released, and the spring 94 is released, and the spring 94 is released, so that the cam 92 and the rod 91 are reset. If the rod 91 matches the position of one of the holes 9 at this time, the rod 91 is released, and the cam 92 is released. 1 will be inserted into the socket 9 in a straight line, locking the large gear 72 so that the large gear 72 cannot rotate, thereby making it impossible to change the length of the extension rod 4 after the adjustment is completed, making it more stable to use; if the insertion rod 91 does not match one of the sockets 9, the bottom of the insertion rod 91 will abut against the top of the large gear 72. At this time, the small gear 71 is slightly rotated to fine-tune the position of the large gear 72, so that one of the sockets 9 on the large gear 72 is aligned with the insertion rod 91, and the insertion rod 91 is squeezed into the socket 9 by the elastic return of the spring 94 to complete the locking.

[0102] Specifically, a telescopic rod 941 is provided in the spring 94 , and the upper and lower ends of the telescopic rod 941 are fixed to the top wall of the adjustment chamber 8 and the top of the fixing block 92 respectively.

[0103] In this embodiment, the provision of the telescopic rod 941 makes it difficult for the spring 94 to elastically deform or tilt when being compressed or reset, so that the insertion rod 91 can be more accurately inserted into the insertion hole 9 .

[0104] Specifically, the driving mechanism includes:

[0105] a motor slot 5 formed on the circumferential surface of the extension rod 4;

[0106] An inspection door 51 is movably hinged to the opening of the motor slot 5;

[0107] The servo motor 6 is fixed to the bottom wall of the motor slot 5 , and the output end of the servo motor 6 movably passes through the top of the extension rod 4 and is fixed to the drill bit 61 .

[0108] In this embodiment: the motor slot 5 is used to accommodate the servo motor 6, and the inspection door 51 is used to protect the servo motor 6. At the same time, the inspection door 51 can be opened to facilitate the inspection of the servo motor 6. By starting the servo motor 6, its output end can drive the drill bit 61 to rotate, thereby loosening the soil. It should be noted that: the servo motor 6 is existing technology and is electrically connected to an external power supply. The corresponding model can be selected according to actual needs.

[0109] Specifically, the top of the extension rod 4 is threadedly connected to a protective sleeve 611 , and the protective sleeve 611 is sleeved on the outside of the drill bit 61 .

[0110] In this embodiment: through the protective sleeve 611, when the drill bit 61 is not in use, the protective sleeve 611 is threadedly connected to the extension rod 4 to protect the drill bit 61, and at the same time can effectively prevent the staff from touching it and causing damage. When using the drill bit 61, the protective sleeve 611 can be unscrewed.

[0111] Specifically, the circumferential surfaces of the center rod 1 and the extension rod 4 are respectively provided with a lower handle groove 101 and an upper handle groove 41 . Two fixing rods 43 are fixed to the upper portion of the circumferential surface of the extension rod 4 . The circumferential surface of the connecting rod 2 is provided with scale lines 22 .

[0112] In this embodiment: through the setting of the lower handle groove 101 and the upper handle groove 41, the staff can place their hands on the lower handle groove 101 and the upper handle groove 41 when holding the center rod 1 and the extension rod 4, so that the hands and the center rod 1 and the extension rod 4 are not easy to slip, and excavation is smoother; through the setting of the two fixing rods 43, it is more convenient to excavate when subjected to force.

[0113] The working principle and usage process of the present invention are as follows: when excavating the soil, the worker holds the central rod 1 and the extension rod 4, and excavates the soil through the shovel head 3; when encountering hard soil and the shovel head 3 cannot crush the soil, the protective sleeve 611 is removed, and the device is turned upside down so that the drill bit 61 is aimed at the soil, and the servo motor 6 is started. The output shaft of the servo motor 6 drives the drill bit 61 to rotate, and the soil is crushed by the drill bit 61 to loosen the soil; then the servo motor 6 is turned off, and the protective sleeve 611 is threadedly connected to the extension rod 4, and excavation can be carried out again through the shovel head 3, which not only reduces the labor consumption but also improves the excavation efficiency.

[0114] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A transmission line grounding grid excavation device, characterized in that: include: A center rod (1) having an opening at the top and a threaded rod (102) fixed at the bottom; A connecting rod (2) having a threaded hole (21) formed on its top, wherein the threaded rod (102) is threadedly connected to the threaded hole (21); A shovel head (3) is fixed to the bottom of the connecting rod (2); An extension rod (4) is arranged on the upper side of the central rod (1); A lifting mechanism is provided in the center rod (1) and is connected to the extension rod (4) to enable it to move in an up and down linear manner; A drill bit (61) is arranged on the top of the extension rod (4); as well as a driving mechanism connected to the drill bit (61) to enable the drill bit (61) to rotate and crush the soil; The lifting mechanism comprises: an adjustment chamber (8) opening into the inner underside of the center rod (1); A screw rod (81) having one end rotatably connected to the bottom wall of the regulating chamber (8) and the other end movably passing through the bottom wall of the opening of the center rod (1) and extending upward; a nut (82) having a thread fitted on the circumferential surface of the extended end of the screw rod (81); An adjusting rod (42) is movably inserted into the center rod (1), the top of the adjusting rod (42) is fixed to the bottom of the extension rod (4), and the nut (82) is fixed to the inner wall of the circumference of the adjusting rod (42); A limit assembly connected to the adjustment rod (42) to enable the adjustment rod (42) to move linearly; An adjusting assembly connected to the screw rod (81) to enable the screw rod (81) to rotate; A locking assembly connected to the adjusting assembly to secure the adjusting assembly; The adjustment component includes: An adjustment port (7) is provided on the circumferential surface of the center rod (1) and communicates with the adjustment chamber (8); A small gear (71) is rotatably connected between the upper and lower inner walls of the regulating port (7) via a rotating shaft; A large gear (72) is fixed to the circumferential surface of the screw rod (81) located in the adjustment chamber (8); The small gear (71) is meshed with the large gear (72); The locking assembly comprises: A plurality of jacks (9) are provided, and the plurality of jacks (9) are evenly distributed and opened on the top of the large gear (72); An insert rod (91) is movably inserted into one of the insert holes (9); A fixed block (92) fixed to the top of the insertion rod (91); a spring (94), one end of which is fixed to the top of the fixed block (92) and the other end of which is fixed to the top wall of the regulating chamber (8); A chute (95) is provided on the circumferential surface of the center rod (1) and is in communication with the regulating chamber (8); The slider (93) is T-shaped, and one end of the slider (93) is inserted into the slide groove (95) and fixed to the fixed block (92).

2. A transmission line grounding grid excavation device according to claim 1, characterized in that: The limiting component includes: A plurality of limit blocks (421), wherein the plurality of limit blocks (421) are all fixed to the circumferential surface of the adjustment rod (42); A plurality of limiting grooves, each of which is formed on the inner surface of the opening of the center rod (1), and the height of the limiting grooves is greater than the height of the limiting block (421); The plurality of limit blocks (421) are respectively slidably connected in the plurality of limit slots.

3. A transmission line grounding grid excavation device according to claim 2, characterized in that: A telescopic rod (941) is provided in the spring (94), and the upper and lower ends of the telescopic rod (941) are respectively fixed to the top wall of the regulating chamber (8) and the top of the fixing block (92).

4. A transmission line grounding grid excavation device according to claim 3, characterized in that: The driving mechanism comprises: A motor slot (5) is provided on the circumferential surface of the extension rod (4); An inspection door (51) is movably hinged to the opening of the motor slot (5); A servo motor (6) is fixed to the bottom wall of the motor slot (5), and an output end of the servo motor (6) movably passes through the top of the extension rod (4) and is fixed to the drill bit (61).

5. The transmission line grounding grid excavation device according to claim 4, characterized in that: The top of the extension rod (4) is threadedly connected to a protective sleeve (611), and the protective sleeve (611) is sleeved on the outside of the drill bit (61).

6. The transmission line grounding grid excavation device according to claim 5, characterized in that: The circumferential surfaces of the central rod (1) and the extension rod (4) are respectively provided with a lower handle groove (101) and an upper handle groove (41). Two fixing rods (43) are fixed to the upper portion of the circumferential surface of the extension rod (4). The circumferential surface of the connecting rod (2) is provided with scale lines (22).

7. An excavation method for a transmission line grounding grid excavation device, applied to a transmission line grounding grid excavation device according to any one of claims 5-6, characterized in that: The steps include: S1. When excavating the soil, the worker holds the central rod (1) and the extension rod (4) and excavates the soil using the shovel head (3); S2. When encountering hard soil and the shovel head (3) cannot crush the soil, the protective sleeve (611) is removed, the device is turned upside down, the drill bit (61) is aligned with the soil, the servo motor (6) is started, and the output shaft of the servo motor (6) drives the drill bit (61) to rotate, and the soil is crushed by the drill bit (61), so that the soil is loosened; S3. Then turn off the servo motor (6), thread the protective sleeve (611) onto the extension rod (4), and excavate again using the shovel head (3).

Images