阅读说明：本技术 防堵型免掰防鸟刺 (Anti-blocking type is exempted from to break and is prevented bird thorn off with fingers and thumb ) 是由 张传民 于 2020-04-08 设计创作，主要内容包括：本发明涉及防鸟刺装置技术领域,是一种防堵型免掰防鸟刺,其包括底座、固定螺栓、内筒、外筒、挡片、操作杆和针刺,底座呈圆柱形,底座下端中央固定安装有固定螺栓,底座下部外侧设有内限位环台,内限位环台下部外侧设有外限位环台；底座上端外侧固定安装有下端座于内限位环台上侧的内筒,内筒呈开口向下的筒形,内筒外侧套装有下端座于外限位环台上侧的外筒,外筒呈开口向下的筒形。本发明结构合理而紧凑,使用方便,通过设置上漏雨孔和下漏雨孔,便于雨水从内筒及底座中排出；通过设置排沙槽,便于沙砾尘土从内筒中排出,具有稳定、高效和使用寿命长的特点。(The invention relates to the technical field of anti-bird thorn devices, in particular to an anti-blocking type anti-bird thorn without being broken off and off, which comprises a base, a fixing bolt, an inner cylinder, an outer cylinder, a baffle, an operating rod and a needle thorn, wherein the base is cylindrical, the fixing bolt is fixedly arranged in the center of the lower end of the base, an inner limiting ring platform is arranged on the outer side of the lower part of the base, and an outer limiting ring platform is arranged on the outer side of the lower part of the inner limiting ring platform; the outer side of the upper end of the base is fixedly provided with an inner barrel with a lower end seat at the upper side of the inner limiting ring table, the inner barrel is of a barrel shape with a downward opening, the outer side of the inner barrel is sleeved with an outer barrel with a lower end seat at the upper side of the outer limiting ring table, and the outer barrel is of a barrel shape with a downward opening. The rainwater drainage device is reasonable and compact in structure and convenient to use, and rainwater can be conveniently drained from the inner barrel and the base through the upper rainwater drainage hole and the lower rainwater drainage hole; through setting up row's husky groove, be convenient for grit dust discharge from the inner tube, have stability, high efficiency and long service life's characteristics.)

1. The anti-blocking type anti-bird thorn without breaking off and breaking off is characterized by comprising a base, a fixing bolt, an inner barrel, an outer barrel, a blocking piece, an operating rod and a needle thorn, wherein the base is cylindrical, the fixing bolt is fixedly arranged in the center of the lower end of the base, an inner limiting ring platform is arranged on the outer side of the lower portion of the base, and an outer limiting ring platform is arranged on the outer side of the lower portion of the inner limiting ring platform; an inner cylinder with a lower end seat at the upper side of the inner limit ring table is fixedly arranged at the outer side of the upper end of the base, the inner cylinder is in a cylinder shape with a downward opening, an outer cylinder with a lower end seat at the upper side of the outer limit ring table is sleeved at the outer side of the inner cylinder, and the outer cylinder is in a cylinder shape with a downward opening; the top surface of the inner barrel is provided with inner positioning holes at intervals, the top surface of the outer barrel corresponding to each inner positioning hole is provided with an outer positioning hole, the inner positioning hole and the outer positioning hole at each corresponding position are internally provided with a needling capable of inclining outwards along with the rotation of the outer barrel, the upper end of the needling is positioned outside the outer barrel, the lower end of the needling is positioned in the inner barrel, a separation blade which is positioned at the upper end of the base is arranged in the inner barrel corresponding to the lower position of all the needling, the center of the separation blade is provided with an upper rain leakage hole which is communicated up and down, and the base corresponding to the outer position of the fixing bolt is provided with; at least one sand discharge groove is distributed along the circumference at the outer side of the inner limiting ring table corresponding to the position above the outer limiting ring table; the center of the upper end of the outer cylinder is fixedly provided with an operating rod which is vertically upward, and the outer side of the upper part of the operating rod is provided with a pull ring.

2. The anti-blocking type anti-snapping anti-bird thorn according to claim 1, wherein at least one circle of circumferentially and uniformly distributed inner positioning holes are formed in the top surface of the inner barrel at intervals from outside to inside.

3. The anti-blocking type anti-snapping anti-bird thorn according to claim 2, further comprising vertical thorns, wherein at least three inner circular holes are uniformly distributed along the circumference on the top surface of the inner cylinder corresponding to the innermost inner side position, outer circular holes are arranged on the top surface of the outer cylinder corresponding to the inner circular holes, vertical thorns are arranged in the inner circular holes and the outer circular holes corresponding to each corresponding position, the upper ends of the vertical thorns are located on the outer side of the outer cylinder, and the lower ends of the vertical thorns are located in the inner cylinder corresponding to the position above the separation blade.

4. The anti-blocking type hands-free and bird-proof thorn according to claim 2 or 3, wherein the inner positioning hole and the outer positioning hole are both oblong, the length of the inner positioning hole at the inner side is smaller than that of the inner positioning hole at the outer side, and the length of the outer positioning hole at the inner side is smaller than that of the outer positioning hole at the outer side.

5. The anti-blocking type anti-snapping anti-bird thorn according to claim 1, 2 or 3, further comprising fixing screws and guide screws, wherein at least two first screw holes are circumferentially distributed on the outer side of the inner cylinder, a second screw hole is arranged on the outer side of the upper portion of the base corresponding to each first screw hole, a guide screw with an inner end fixedly mounted in the second screw hole corresponding to each first screw hole is arranged in any one first screw hole, and fixing screws with inner ends fixedly mounted in the second screw holes corresponding to each other are arranged in the other first screw holes; the outer side of the outer barrel corresponding to the position of the guide screw is provided with a sliding groove which is horizontally arranged, the two ends of the sliding groove are respectively provided with a first clamping groove and a second clamping groove which can be communicated with the sliding groove, the first clamping groove and the second clamping groove are perpendicular to the sliding groove and extend upwards, and the outer end of the guide screw is located in the first clamping groove.

6. The anti-blocking type anti-snapping and anti-bird thorn according to claim 4, further comprising fixing screws and guide screws, wherein at least two first screw holes are circumferentially distributed on the outer side of the inner cylinder, a second screw hole is arranged on the outer side of the upper portion of the base corresponding to each first screw hole, a guide screw with an inner end fixedly mounted in the second screw hole corresponding to each first screw hole is arranged in any one first screw hole, and fixing screws with inner ends fixedly mounted in the second screw holes corresponding to each first screw hole are arranged in the other first screw holes; the outer side of the outer barrel corresponding to the position of the guide screw is provided with a sliding groove which is horizontally arranged, the two ends of the sliding groove are respectively provided with a first clamping groove and a second clamping groove which can be communicated with the sliding groove, the first clamping groove and the second clamping groove are perpendicular to the sliding groove and extend upwards, and the outer end of the guide screw is located in the first clamping groove.

7. The anti-blocking type anti-snapping anti-bird thorn according to claim 1, 2, 3 or 6, wherein three rain-leaking holes which are through up and down are evenly distributed on the base corresponding to the outer side position of the fixing bolt along the circumference at intervals, a concave platform is arranged in the center of the upper end of the base, a slope surface is arranged on the base corresponding to the position between every two adjacent rain-leaking holes, and the slope surface is in the shape of a circular arc with a high outer part and a low inner part; or/and the base is made of EPP material; or/and the outer cylinder is in a cylinder shape with a downward opening and a small upper part and a large lower part, and the top surface of the outer cylinder is in a spherical crown shape.

8. The anti-blocking type anti-snapping and anti-bird thorn according to claim 4, wherein three rain-leaking holes are uniformly distributed at intervals along the circumference on the base corresponding to the outer side of the fixing bolt, a concave platform is arranged in the center of the upper end of the base, and a slope surface is arranged on the base corresponding to the position between every two adjacent rain-leaking holes and is in the shape of a circular arc with a high outer part and a low inner part; or/and the base is made of EPP material; or/and the outer cylinder is in a cylinder shape with a downward opening and a small upper part and a large lower part, and the top surface of the outer cylinder is in a spherical crown shape.

9. The anti-blocking type anti-snapping and anti-bird thorn according to claim 5, wherein three rain-leaking holes are evenly distributed along the circumference at intervals on the base corresponding to the outer side of the fixing bolt, a concave platform is arranged in the center of the upper end of the base, and a slope surface is arranged on the base corresponding to the position between every two adjacent rain-leaking holes and is in the shape of a circular arc with a high outer part and a low inner part; or/and the base is made of EPP material; or/and the outer cylinder is in a cylinder shape with a downward opening and a small upper part and a large lower part, and the top surface of the outer cylinder is in a spherical crown shape.

Technical Field

The invention relates to the technical field of bird spike prevention devices, in particular to an anti-blocking type anti-bird spike free of being broken off.

Background

With the rapid development of power grid construction, overhead transmission lines are continuously extended, the lines are generally distributed in various regions of cities and countryside, and birds easily inhabit and move due to the fact that high-voltage transmission line towers are tall, large, stable and wide, and particularly the flashover fault of the transmission lines can be caused when the birds are excreted above the wires.

At present, the used bird spike has poor furling effect and is inconvenient to unfold. Because the bird-proof thorn is exposed outdoors for a long time, rain, snow, sand, dust and the like can block the inside of the bird-proof thorn, the bird-proof thorn cannot be folded in during maintenance, and the service life of the bird-proof thorn is influenced. In addition, need the staff to squat down after the installation of current bird thorn and will prevent that bird thorn draws in, increase working strength.

Disclosure of Invention

The invention provides an anti-blocking type anti-bird thorn without being broken off and broken off, overcomes the defects of the prior art, and can effectively solve the problem that the existing anti-bird thorn cannot be folded due to the blockage of rain, snow, gravel and dust.

The technical scheme of the invention is realized by the following measures: the anti-blocking type anti-bird thorn without breaking off comprises a base, a fixing bolt, an inner barrel, an outer barrel, a blocking piece, an operating rod and a needle thorn, wherein the base is cylindrical, the fixing bolt is fixedly arranged in the center of the lower end of the base, an inner limiting ring platform is arranged on the outer side of the lower part of the base, and an outer limiting ring platform is arranged on the outer side of the lower part of the inner limiting ring platform; an inner cylinder with a lower end seat at the upper side of the inner limit ring table is fixedly arranged at the outer side of the upper end of the base, the inner cylinder is in a cylinder shape with a downward opening, an outer cylinder with a lower end seat at the upper side of the outer limit ring table is sleeved at the outer side of the inner cylinder, and the outer cylinder is in a cylinder shape with a downward opening; the top surface of the inner barrel is provided with inner positioning holes at intervals, the top surface of the outer barrel corresponding to each inner positioning hole is provided with an outer positioning hole, the inner positioning hole and the outer positioning hole at each corresponding position are internally provided with a needling capable of inclining outwards along with the rotation of the outer barrel, the upper end of the needling is positioned outside the outer barrel, the lower end of the needling is positioned in the inner barrel, a separation blade which is positioned at the upper end of the base is arranged in the inner barrel corresponding to the lower position of all the needling, the center of the separation blade is provided with an upper rain leakage hole which is communicated up and down, and the base corresponding to the outer position of the fixing bolt is provided with; at least one sand discharge groove is distributed along the circumference at the outer side of the inner limiting ring table corresponding to the position above the outer limiting ring table; the center of the upper end of the outer cylinder is fixedly provided with an operating rod which is vertically upward, and the outer side of the upper part of the operating rod is provided with a pull ring.

The following is further optimization or/and improvement of the technical scheme of the invention:

the top surface of the inner cylinder can be provided with at least one circle of inner positioning holes uniformly distributed along the circumference from outside to inside at intervals.

The above-mentioned still can have at least three interior round hole along circumference interval equipartition corresponding to the inner tube top surface of the most inner circle inboard position, and the top surface of the urceolus that corresponds interior round hole position all is equipped with outer round hole, and every interior round hole that corresponds the position and outer round are downthehole all to wear to be equipped with perpendicular thorn, erects the thorn upper end and is located the urceolus outside, erects the thorn lower extreme and is located the inner tube that corresponds separation blade top position.

The inner positioning hole and the outer positioning hole are both in oblong shapes, the length of the inner positioning hole located on the inner side is smaller than that of the inner positioning hole located on the outer side, and the length of the outer positioning hole located on the inner side is smaller than that of the outer positioning hole located on the outer side.

The device also comprises a fixing screw and a guide screw, wherein at least two first screw holes are distributed on the outer side of the inner cylinder along the circumference, a second screw hole is arranged on the outer side of the upper part of the base corresponding to each first screw hole, a guide screw with the inner end fixedly arranged in the second screw hole corresponding to the position is arranged in any one first screw hole, and fixing screws with the inner ends fixedly arranged in the second screw holes corresponding to the positions are arranged in the other first screw holes; the outer side of the outer barrel corresponding to the position of the guide screw is provided with a sliding groove which is horizontally arranged, the two ends of the sliding groove are respectively provided with a first clamping groove and a second clamping groove which can be communicated with the sliding groove, the first clamping groove and the second clamping groove are perpendicular to the sliding groove and extend upwards, and the outer end of the guide screw is located in the first clamping groove.

Three rain holes penetrating up and down can be uniformly distributed on the base corresponding to the outer side position of the fixing bolt at intervals along the circumference, a concave platform is arranged in the center of the upper end of the base, a slope surface is arranged on the base corresponding to the position between every two adjacent rain holes, and the slope surface is in the shape of a circular arc with a high outer part and a low inner part.

The base may be made of EPP material.

The outer cylinder can be in a cylinder shape with a downward opening and a small upper part and a large lower part, and the top surface of the outer cylinder is in a spherical crown shape.

The rainwater drainage device is reasonable and compact in structure and convenient to use, and rainwater can be conveniently drained from the inner barrel and the base through the upper rainwater drainage hole and the lower rainwater drainage hole; the sand discharge groove is arranged, so that sand, gravel and dust can be conveniently discharged from the inner cylinder; the guide screw enters the sliding groove from the first clamping groove by lifting and rotating the outer cylinder; the guide screw in the sliding groove enters the second clamping groove by rotating and pressing; the first clamping groove is arranged, so that the needling is stable and reliable when gathered; through setting up the second draw-in groove, make the acupuncture reliable and stable when expansion state, have stable, high-efficient and long service life's characteristics.

Drawings

FIG. 1 is a schematic sectional view of the preferred embodiment of the present invention.

Fig. 2 is a front sectional structural view of fig. 1 in a use state.

Fig. 3 is a front view of the base in fig. 1.

Fig. 4 is a schematic top view of the base shown in fig. 1.

Fig. 5 is a schematic top view of the outer tub of fig. 1.

FIG. 6 is a schematic top view of the inner barrel of FIG. 1.

The codes in the figures are respectively: 1 is the base, 2 is fixing bolt, 3 is the inner tube, 4 is the urceolus, 5 is the separation blade, 6 is the acupuncture, 7 is interior spacing ring platform, 8 is outer spacing ring platform, 9 is interior locating hole, 10 is outer locating hole, 11 is for going up leaking the rain hole, 12 is for leaking the rain hole, 13 is interior round hole, 14 is outer round hole, 15 is the action bars, 16 is the concave station, 17 is the guide screw, 18 is the spout, 19 is first draw-in groove, 20 is the groove of arranging the sand, 21 is domatic.

Detailed Description

The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.

In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.

The invention is further described with reference to the following examples and figures:

as shown in the attached drawings 1, 2, 3, 4, 5 and 6, the anti-blocking type anti-snapping bird-preventing thorn comprises a base 1, a fixing bolt 2, an inner barrel 3, an outer barrel 4, a baffle 5, an operating rod 15 and a needle thorn 6, wherein the base 1 is cylindrical, the fixing bolt 2 is fixedly installed in the center of the lower end of the base 1, an inner limiting ring platform 7 is arranged on the outer side of the lower part of the base 1, and an outer limiting ring platform 8 is arranged on the outer side of the lower part of the inner limiting ring platform 7; an inner cylinder 3 with a lower end seated on the upper side of an inner limit ring table 7 is fixedly installed on the outer side of the upper end of the base 1, the inner cylinder 3 is in a cylinder shape with a downward opening, an outer cylinder 4 with a lower end seated on the upper side of an outer limit ring table 8 is sleeved on the outer side of the inner cylinder 3, and the outer cylinder 4 is in a cylinder shape with a downward opening; the top surface of the inner barrel 3 is provided with inner positioning holes 9 at intervals, the top surface of the outer barrel 4 corresponding to each position of the inner positioning hole 9 is provided with an outer positioning hole 10, the inner positioning hole 9 and the outer positioning hole 10 of each corresponding position are respectively provided with a needle 6 which can incline outwards along with the rotation of the outer barrel 4, the upper end of the needle 6 is positioned outside the outer barrel 4, the lower end of the needle 6 is positioned in the inner barrel 3, the inner barrel 3 corresponding to the lower position of all the needle 6 is internally provided with a baffle 5 which is positioned at the upper end of the base 1, the center of the baffle 5 is provided with an upper rain leaking hole 11 which is through up and down, and the base 1 corresponding to the outer position of the fixing bolt 2; at least one sand discharge groove 20 is circumferentially distributed on the outer side of the inner limit ring platform 7 corresponding to the position above the outer limit ring platform 8; the center of the upper end of the outer cylinder 4 is fixedly provided with an operating rod 15 which is vertically upward, and the outer side of the upper part of the operating rod 15 is provided with a pull ring. In the using process, the rainwater drainage device is fixedly arranged with a cross arm on a power transmission line tower frame through the fixing bolt 2, and rainwater is conveniently drained from the inner cylinder 3 and the base 1 through the upper rainwater drainage hole 11 and the lower rainwater drainage hole 12; the sand discharge groove 20 is arranged, so that sand, gravel and dust can be conveniently discharged from the inner cylinder 3; the blocking piece 5 is arranged to prevent the acupuncture 6 from slipping from the lower part of the base 1; by rotating the outer cylinder 4 relative to the inner cylinder 3, the upper end of the needle 6 is inclined outward under the cooperation of the inner positioning hole 9 and the outer positioning hole 10, thereby realizing the unfolding of the needle 6; in addition, the operating rod 15 is fixedly installed with the outer cylinder 4 by the prior known technology, such as welding, etc., and the arrangement of the operating rod 15 and the pull ring is convenient for workers to lift, press and rotate the outer cylinder 4, so as to avoid the outer cylinder 4 from being twisted when the workers squat at the installation place of the invention. According to requirements, the outer cylinder 4 is in clearance fit with the inner limiting ring table 7, so that the inner cylinder 3 and the outer cylinder 4 can rotate relatively; a swinging clearance of the acupuncture 6 is reserved between the acupuncture 6 and the inner positioning hole 9 and the outer positioning hole 10, and in addition, a long groove which is through from front to back can be arranged in the middle of the lower side of the base 1, so that the fixing with the tower is facilitated after the fixing with the existing well-known tower fixing clamp.

According to actual needs, the anti-blocking type is further optimized or/and improved:

as shown in fig. 1, 2, 3, 4, 5 and 6, the top surface of the inner cylinder 3 is provided with at least one circle of inner positioning holes 9 which are uniformly distributed along the circumference from outside to inside at intervals. In the use process, through the arrangement, the coverage area of the unfolded acupuncture 6 is wider, and the bird prevention effect is better.

As shown in the attached figures 1, 2, 3, 4, 5 and 6, the device further comprises vertical thorns, at least three inner circular holes 13 are uniformly distributed on the top surface of the inner cylinder 3 corresponding to the innermost inner side position at intervals along the circumference, outer circular holes 14 are arranged on the top surface of the outer cylinder 4 corresponding to the inner circular holes 13, the vertical thorns are arranged in the inner circular holes 13 and the outer circular holes 14 corresponding to each corresponding position in a penetrating manner, the upper ends of the vertical thorns are positioned on the outer side of the outer cylinder 4, and the lower ends of the vertical thorns are positioned in the inner cylinder 3 corresponding to the. In the using process, the vertical thorns are arranged, so that the bird-proof device has a better bird-proof effect.

As shown in fig. 1, 2, 3, 4, 5 and 6, the inner positioning hole 9 and the outer positioning hole 10 are both oblong, the length of the inner positioning hole 9 located on the inner side is smaller than that of the inner positioning hole 9 located on the outer side, and the length of the outer positioning hole 10 located on the inner side is smaller than that of the outer positioning hole 10 located on the outer side. In the use process, the acupuncture 6 can be conveniently swung to be inclined from a vertical state by arranging the oblong inner positioning hole 9 and the oblong outer positioning hole 10; the lengths of the inner positioning hole 9 and the outer positioning hole 10 are gradually reduced from outside to inside through the arrangement, so that the swinging angle of the acupuncture 6 is gradually reduced, namely the swinging angle of the outer ring is large, the swinging angle of the inner ring is small, and the situation that the acupuncture 6 of the inner ring and the outer ring is interfered in position after swinging is avoided, and the acupuncture 6 is influenced to be withdrawn and opened again. According to requirements, two circles of inner positioning holes 9 uniformly distributed along the circumference are arranged on the top surface of the inner barrel 3 from outside to inside at intervals, the inner positioning holes 9 of the outer ring, the inner positioning holes 9 of the inner ring and the inner circular holes 13 are arranged in concentric circles from outside to inside, the number of the inner positioning holes 9 of the outer ring can be 16, the length of the needle pricks 6 in the inner positioning holes 9 of the outer ring can be 65 cm, the number of the inner positioning holes 9 of the inner ring can be 14, the length of the needle pricks 6 in the inner positioning holes 9 of the inner ring can be 55 cm, the number of the inner circular holes 13 can be 8, the length of the vertical pricks in the inner circular holes 13 can be 45 cm, position interference occurs after the needle pricks 6 are arranged, the coverage area is hemispherical, and the bird prevention effect is better; the needling 6 and the vertical needling are steel wires with the diameter of 2 mm; in addition, the top surface of the outer barrel 4 is in a spherical crown shape, the bottoms of the acupuncture 6 and the vertical acupuncture are both provided with ball heads, and the diameter of each ball head is larger than the inner diameters of the inner positioning hole 9 and the inner circular hole 13, so that the acupuncture 6 and the vertical acupuncture are prevented from slipping from the upper part of the outer barrel 4.

As shown in the attached figures 1, 2, 3, 4, 5 and 6, the device further comprises a fixing screw and a guide screw 17, at least two first screw holes are distributed on the outer side of the inner cylinder 3 along the circumference, a second screw hole is arranged on the outer side of the upper part of the base 1 corresponding to each first screw hole, the guide screw 17 with the inner end fixedly installed in the second screw hole corresponding to each first screw hole is arranged in any one first screw hole, and the fixing screws with the inner ends fixedly installed in the second screw holes corresponding to each other are arranged in the rest first screw holes; the outer side of the outer barrel 4 corresponding to the position of the guide screw 17 is provided with a sliding groove 18 which is horizontally arranged, two ends of the sliding groove 18 are respectively provided with a first clamping groove 19 and a second clamping groove which can be communicated with the sliding groove 18, the first clamping groove 19 and the second clamping groove are both perpendicular to the sliding groove 18 and extend upwards, and the outer end of the guide screw 17 is positioned in the first clamping groove 19. According to the demand, the circumference equipartition has three first screw in the inner tube 3 outside, from this can be better with base 1 and inner tube 3 fixed mounting together. During use, the guide screw 17 enters the sliding groove 18 from the first clamping groove 19 by lifting and rotating the outer cylinder 4; the guide screw 17 in the sliding groove 18 enters the second clamping groove by rotating and pressing; the first clamping groove 19 is arranged, so that the acupuncture 6 is stable and reliable when gathered; the second clamping groove is arranged, so that the acupuncture 6 is stable and reliable in the unfolding state; in addition, the sliding groove 18, the first clamping groove 19 and the second clamping groove are arranged on the outer cylinder 4, so that the position of the guide screw 17 during movement can be observed conveniently, and the outer cylinder 4 and the guide screw 17 can be mounted on the inner cylinder 3 conveniently.

As shown in the attached figures 1, 2, 3, 4, 5 and 6, three rain-leaking holes 12 which are communicated up and down are uniformly distributed on the base 1 corresponding to the outer side position of the fixing bolt 2 at intervals along the circumference, a concave platform 16 is arranged at the center of the upper end of the base 1, a slope 21 is arranged on the base 1 corresponding to the position between every two adjacent rain-leaking holes 12, and the slope 21 is in the shape of a circular arc with a high outer part and a low inner part. In the use process, the concave platform 16 is arranged, so that the gap between the center of the top surface of the base 1 and the center of the ground of the baffle 5 is conveniently increased, and rainwater, gravel, dust and the like can conveniently fall down and be discharged from the rainwater drainage hole 12; the effect of draining rainwater and sand and dust is enhanced by the provision of the three rain drainage holes 12 and the slope 21.

As shown in fig. 1, 2, 3, 4, 5 and 6, the base 1 may be made of EPP material. In the use process, the base 1 is made of EPP materials, so that the use strength is better, and the processing is convenient.

As shown in fig. 1, 2, 3, 4, 5 and 6, the outer cylinder 4 is a cylinder with a downward opening and a small top and a large bottom, and the top surface of the outer cylinder 4 is in a spherical crown shape. Deployment of the needle 6 is facilitated by such an arrangement during use.

The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.