Wellhead temporary protection device capable of preventing falling danger

Abstract

The utility model discloses a wellhead temporary protection device capable of preventing falling danger, which comprises a cover plate base arranged in a wellhead, a wellhead cover plate, a fan-shaped protection wing plate, an opening and closing end protection component and a linkage power receiving component, wherein one end of the wellhead cover plate is hinged with one side in the cover plate base, and the other end of the wellhead cover plate is lapped on the other side in the cover plate base to form an opening and closing end; and the power supply is connected with the power supply. The utility model solves the problems that the temporary protective cover plate for the well mouth does not cover in place, constructors are easy to step down and fall off, and materials stacked beside the well are easy to fall off and hurt the constructors when the constructors go out of or go into the well.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction engineering safety, and in particular relates to a temporary wellhead protection device capable of preventing the danger of falling. Background Art

[0002] Temporary manhole protection commonly used at construction sites includes wooden formwork, steel plates, and steel grating covers. Under normal use, these effectively prevent falls from height. However, in practice, the covers often remain uncovered, inadequately covered, or lost. Analysis reveals two main causes: 1. Workers lack safety awareness and arbitrarily move the manhole covers or use them for other purposes. 2. Workers fail to promptly restore the manhole covers after descending, or they improperly operate the manholes, leaving the covers in place or forgotten. Furthermore, in engineering practice, the applicant has discovered that at complex construction sites, construction materials may be temporarily stacked near the manholes or on the manhole covers. When construction workers open the manhole covers to exit or enter the well, there is a risk of falling materials injuring people. This is especially true when exiting the well, as the surrounding environment cannot be observed from within the wellhead, making the risk of falling objects injuring people even more severe. Utility Model Content

[0003] In response to the above problems, the purpose of the present utility model is to provide a temporary wellhead protection device that can prevent the risk of falling, so as to solve the problem that the temporary protection cover of the wellhead is not covered in place, construction workers are prone to step on air and fall, and when construction workers enter or exit the well, materials piled near the well are prone to fall and injure the construction workers.

[0004] The utility model is achieved through the following technical solutions.

[0005] A temporary wellhead protection device capable of preventing the danger of falling comprises a power source, a cover base disposed in the wellhead, a wellhead cover having one end hinged to one side of the interior of the cover base and the other end overlapped to the other side of the interior of the cover base to form an open and closed end, and is characterized in that it also comprises:

[0006] Sector-shaped protective wing plates, wherein the sector-shaped protective wing plates are vertically connected to the edges of both sides of the wellhead cover plate and the center of the circle of the sector-shaped protective wing plates coincides with the hinged rotation axis of the wellhead cover plate;

[0007] An opening and closing end protection assembly, comprising a spring drum disposed within the cover base near the opening and closing end and capable of rolling the flexible protection net downward, and a magnetic end rod, one end of which is wound around the spring drum and the other end of which is fixedly connected to the lower edge of the end rod;

[0008] Telescopic support rods are arranged on both sides of the wellhead cover plate, and the telescopic support rods include a lower support rod with one end hingedly connected to the inside of the cover plate base, an upper support rod with one end slidably connected to the lower support rod and the other end hingedly connected to the bottom edge of the wellhead cover plate;

[0009] an electromagnet, which is disposed at the lower edge of the opening and closing end of the wellhead cover and is electrically connected to the first contact rod for magnetically engaging with the end rod;

[0010] an alarm, the alarm being disposed on a side of the cover base away from the engagement end and being electrically connected to the second contact rod; and

[0011] A linkage power receiving component, wherein the linkage power receiving component is arranged on the telescopic support rod on either side, the linkage power receiving component includes an insulated relay rod, a first contact rod and a second contact rod that are conductive and arranged along the sliding direction of the upper support rod, and an insulated power receiving plate fixedly arranged on the lower support rod; one end of the first contact rod is insulated and fixedly connected to the upper support rod, and the other end is vertically fixedly connected to one end of the relay rod; one end of the second contact rod is insulated and slidably connected to the lower support rod, and the other end is vertically fixedly connected to the other end of the relay rod; the wellhead cover drives the telescopic support rod to extend and retract during the opening and closing process The electric plate is compressed so that the power receiving plate is in sliding contact with the first contact rod or the second contact rod; when the wellhead cover is in a closed state and the opening angle is less than or equal to the safety angle, the power receiving plate is only in sliding contact with the first contact rod, and the power receiving plate, the first contact rod and the electromagnet are connected in series before the two poles of the power supply to form a closed circuit, so that the electromagnet is energized to generate magnetic force to attract the end rod; when the opening angle of the wellhead cover is greater than the safety angle, the power receiving plate is only in sliding contact with the second contact rod, and the power receiving plate, the second contact rod and the alarm are connected in series before the two poles of the power supply to form a closed circuit, so that the alarm is energized to emit an audible and visual alarm.

[0012] Preferably, the radius of the fan-shaped protective wing plate is 0.8 to 1 times the rotation radius of the wellhead cover plate, and the central angle of the fan-shaped protective wing plate is 45 to 90 degrees.

[0013] Preferably, the fan-shaped protective wing plate includes an arc frame, two straight frames, and a wire mesh arranged in the fan-shaped area enclosed by the arc frame and the two straight frames; the fan-shaped protective wing plate is vertically connected to the edge of the wellhead cover plate through the straight frames.

[0014] Preferably, an end rod guide groove is provided along the arc line of the arc frame of the fan-shaped protective wing plate, and both ends of the end rod are slidably connected to the end rod guide groove.

[0015] Preferably, the relay rod is arc-shaped and the arc portion thereof is arranged away from the power receiving plate, so that the power receiving plate will not contact the relay rod when sliding between the first contact rod and the second contact rod.

[0016] Preferably, the cover base is provided with limiting tongues on both sides of the inner wall near the opening and closing end, and the upper surface of the limiting tongue is provided with an end rod bracket. When the wellhead cover is in a closed state, its opening and closing end falls on the limiting tongue, and the end rod falls into the end rod bracket and abuts against the electromagnet.

[0017] Preferably, the wellhead cover plate is a square grating plate, the wellhead cover plate is made of lightweight profiles, and a reflective warning strip is provided on the outer edge of the wellhead cover plate.

[0018] Preferably, the power receiving plate is formed by bending an elastic metal sheet and has an arched cross section; the arched portion of the power receiving plate is in sliding contact with the first contact rod or the second contact rod.

[0019] Preferably, the outer edge of the cover base is provided with a mounting flange, and the four corner ends of the mounting flange are provided with screw holes.

[0020] Preferably, the present invention further comprises an insulated flexible protective sleeve that can freely extend and retract along the sliding direction of the upper support rod. The flexible protective sleeve is sleeved on the telescopic support rod, and the linked power receiving assembly is accommodated in the flexible protective sleeve.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1) The utility model provides fan-shaped protective wings on both sides of the wellhead cover plate, and provides an opening and closing end protection component at the open end of the wellhead cover plate, which can effectively prevent the construction workers from being injured by materials piled near the well when they are leaving or entering the well.

[0023] 2) The utility model provides a linkage power receiving component on the telescopic support rod, and uses the opening and closing of the manhole cover to drive the telescopic support to extend and retract, thereby changing the connection state between the power receiving plate and the first contact rod and the second contact rod. When the manhole cover is closed and the opening angle is less than or equal to the safety angle, the end rod will pull out the flexible protective net wound on the spring drum, thereby blocking the exposed space at the opening and closing end of the manhole cover to prevent the building materials stacked at the opening end from falling into the well and causing safety risks. When working out of the well, the construction personnel can observe the environment around the wellhead or the environment inside the well through the pulled out flexible protective net. When the opening and closing angle of the manhole cover is greater than the safety angle, the electromagnet loses power and loses its adsorption force, and the spring drum can automatically roll down and retract the pulled out flexible protective net to facilitate the construction personnel to enter and exit the well. At the same time, the alarm is energized to emit an audible and visual alarm to remind the relevant construction personnel to pay attention to the situation of entering and leaving the well, and to remind the construction personnel to close the manhole cover in time after entering and exiting the well.

[0024] Based on the above, when construction workers enter and exit the well, the utility model does not require additional operations. Only by opening and closing the well cover normally can the coordinated work of the opening and closing end protection components and the alarm be automatically achieved, which can effectively ensure the safety of construction workers entering and exiting the well. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0027] Figure 2 It is a top view of the utility model;

[0028] Figure 3 yes Figure 1 Cross-sectional view at AA in the middle;

[0029] Figure 4 This is a schematic diagram of the main structure of the linked power receiving assembly and the telescopic support rod;

[0030] Figure 5 yes Figure 4 Cross-sectional view at the middle BB;

[0031] Figure 6 yes Figure 5 Cross-section at the middle CC;

[0032] Figure 7 yes Figure 5 Cross-section at the middle DD;

[0033] Figure 8 This is a schematic diagram of the main structure of the utility model in a closed state (without the wire mesh);

[0034] Figure 9 This is a schematic diagram of the main structure of the utility model in the open and closed state with the opening and closing angle smaller than the safety angle (without the wire mesh);

[0035] Figure 10 This is a schematic diagram of the main structure of the utility model in an open and closed state with the opening and closing angle greater than the safety angle (without the wire mesh);

[0036] Figure 11 It is a schematic diagram of the three-dimensional structure of the utility model in an open and closed state with an opening and closing angle smaller than a safety angle;

[0037] The grids in the above figure mean: wellhead cover 1, opening and closing end 101, reflective warning strip 102, cover base 2, limiting tongue 201, end rod bracket 202, mounting flange 203, fan-shaped protective wing 3, arc frame 301, end rod guide groove 3011, straight frame 302, opening and closing end protection assembly 4, spring reel 401, end rod 402, flexible protective net 403, telescopic support rod 5, lower support rod 501, upper support rod 502, linkage power receiving assembly 6, first contact rod 601, second contact rod 602, relay rod 603, power receiving plate 604, electromagnet 7, alarm 8, flexible protective sleeve 9. DETAILED DESCRIPTION

[0038] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. However, the following embodiments and drawings are only used to understand the present invention and are not intended to limit the present invention. The present invention can be implemented in a variety of different ways as defined and covered by the claims.

[0039] Example 1

[0040] Temporary protection devices for wellheads to prevent fall hazards, see Figures 1 to 11 , including a cover base 2 arranged in the wellhead 1, a wellhead cover 1 with one end hinged to one side of the inside of the cover base 2 and the other end overlapped to the other side of the inside of the cover base 2 to form an opening and closing end 101, a fan-shaped protective wing plate 3, an opening and closing end protection component 4, a linkage power receiving component 6, a telescopic support rod 5, an electromagnet 7, an alarm 8, and a power supply;

[0041] Wherein, the power source is a battery or a power supply network near the wellhead, which is not shown in the figure;

[0042] The fan-shaped protective wing plate 3 is vertically connected to the edges of both sides of the wellhead cover plate 1 and its center coincides with the hinge axis of the wellhead cover plate 1, so that the fan-shaped protective wing plate 3 can rotate synchronously with the wellhead cover plate 1 around the hinge axis to cover the exposed space on both sides of the wellhead cover plate 1;

[0043] The opening and closing end protection assembly 4 includes a spring drum 401 arranged in the cover base 2 near the opening and closing end 101, which can roll up the flexible protection net 403 downward, and an end rod 402 with magnetic properties and sliding connection with the end rod guide groove 3011 at both ends, one end of which is wound on the spring drum 401, and the other end is fixedly connected to the lower edge of the end rod 402. The flexible protection net 403; specifically, a torsion spring is arranged in the spring drum 401. When the wellhead cover 1 is opened, the end rod 402 will synchronously rotate around the hinge axis of the wellhead cover 1 and rise due to the adsorption of the electromagnet 7, thereby pulling out the flexible protection net 403 wound on the spring drum 401. When the end rod 402 instantly loses the adsorption force of the electromagnet 7, under the action of the torsion spring, the flexible protection net 403 is rolled back into place by the spring drum 401, and the end rod 402 returns to its initial position.

[0044] The telescopic support rod 5 is provided on both sides of the wellhead cover plate 1. The telescopic support rod 5 includes a lower support rod 501 with one end hingedly connected to the inside of the cover plate base 2, and an upper support rod 502 with one end slidingly connected to the lower support rod 501 and the other end hingedly connected to the bottom edge of the wellhead cover plate 1;

[0045] The electromagnet 7 is arranged at the lower edge of the opening and closing end 101 of the wellhead cover 1 and is electrically connected to the first contact rod 601 for magnetically engaging with the end rod 402;

[0046] The alarm 8 is arranged on a side of the cover base 2 away from the engagement end 101 and is electrically connected to the second contact rod 602;

[0047] The linkage power receiving component 6 is arranged on the telescopic support rod 5 on either side, and the linkage power receiving component 6 includes an insulated relay rod 603, a first contact rod 601 and a second contact rod 602 that are conductive and arranged along the sliding direction of the upper support rod 502, and a power receiving plate 604 that is insulated and fixed on the lower support rod 501 and parallel to the relay rod 603; one end of the first contact rod 601 is insulated and fixedly connected to the upper support rod 502, and the other end is vertically fixedly connected to one end of the relay rod 603; one end of the second contact rod 602 is insulated and slidably connected to the lower support rod 501, and the other end is vertically fixedly connected to the other end of the relay rod 603, so that the ends of the first contact rod 601 and the second contact rod 602 close to each other are staggered and connected along the sliding direction of the support rod 502; the wellhead cover 1 is During the opening and closing process, the telescopic support rod 5 is driven to extend and retract, so that the power receiving plate 604 slides in contact with the first contact rod 601 or the second contact rod 602; when the wellhead cover 1 is in a closed state and the opening angle is less than or equal to the safety angle, the power receiving plate 604 only slides in contact with the first contact rod 601, and the power receiving plate 604, the first contact rod 601 and the electromagnet 7 are connected in series before the two poles of the power supply to form a closed circuit, so that the electromagnet 7 is energized to generate magnetic force to attract the end rod 402, and at this time the alarm 8 is not energized; when the opening angle of the wellhead cover 1 is greater than the safety angle, the power receiving plate 604 only slides in contact with the second contact rod 602, and the power receiving plate 604, the second contact rod 602 and the alarm 8 are connected in series before the two poles of the power supply to form a closed circuit, so that the alarm 8 is energized to emit an audible and visual alarm, and at this time the electromagnet 7 is not energized;

[0048] Based on the above structural description, the working principle of this utility model is as follows: Figure 8When the wellhead cover 1 is in the closed state, the telescopic support rod 5 is in the initial state, the end rod 402 is in the initial position, and the power receiving plate 604 is at the position farthest from the second contact rod 602. The power receiving plate 604 only maintains contact with the first contact rod 601. The power receiving plate 604, the first contact rod 601 and the electromagnet 7 are connected in series between the two poles of the power supply to form a closed circuit, so that the electromagnet 7 is energized to generate magnetic force to attract the end rod 402, thereby making the wellhead cover 1 firmly covered in the cover base 2; please refer to Figure 9 and Figure 11 When it is necessary to exit or enter the well, the wellhead cover plate 1 can be lifted or pulled up at the open end of the wellhead cover plate 1. When the wellhead cover plate 1 is opened so that its opening angle is less than or equal to the safety angle, the telescopic support rod 5 is extended, and the upper support rod 502 drives the first contact rod 601 and the second contact rod 602 to move as a whole along the extension direction of the upper support rod 502, while the position of the power receiving plate 604 on the lower support rod 501 remains unchanged. During this process, the power receiving plate 604 is still in sliding contact with the first contact rod 601, but moves toward the second contact rod 602. The contact rod 602 is positioned close to each other, and the electromagnet 7 will continue to attract the end rod 402. During the opening process of the wellhead cover 1, the flexible protective net 403 wound on the spring drum 401 can be pulled out through the end rod 402, thereby shielding the exposed space at the opening and closing end 101 of the wellhead cover 1 to prevent the construction materials piled at the opening end from falling into the well and causing safety risks. In addition, when working out of the well, the construction workers can observe the environment around the wellhead or the environment inside the well through the pulled out flexible protective net 403; please refer to Figure 10 When the wellhead cover 1 continues to be opened so that its opening angle is greater than the safety angle, similar to the above, the power receiving plate 604 will pass over the connection between the first contact rod 601 and the second contact rod 602, and finally slide to the second contact rod 602 and maintain sliding contact with the second contact rod 602. At this time, the power receiving plate 604 is no longer in sliding contact with the first contact rod 601, the electromagnet 7 is powered off and loses its adsorption force, and the spring reel 401 automatically rolls down the already pulled flexible protective net 403 to facilitate the construction personnel to enter and exit the well; at the same time, the power receiving plate 604, the second contact rod 602 and the alarm 8 are connected in series before the two poles of the power supply to form a closed circuit, so that the alarm 8 is energized and emits a sound. An audible and visual alarm is given to remind construction workers or construction machinery outside the well to pay attention to construction workers leaving the well at the wellhead, or to remind construction workers or construction machinery inside the well to pay attention to construction workers entering the well at the wellhead, and to remind construction workers to close the wellhead cover 1 in time after entering and exiting the well; in addition, when the wellhead cover 1 is opened, since the wellhead cover 1 is hinged to the cover base 2, the wellhead cover 1 will rotate around the hinged rotation axis, thereby driving the fan-shaped protective wing plate 3 to rotate around its center of circle. At this time, the fan-shaped protective wing plate 3 moves synchronously to block the exposed space on both sides of the wellhead cover 1, thereby effectively preventing construction materials on both sides of the wellhead from falling and injuring construction workers who are preparing to exit the well.

[0049] Furthermore, in a preferred embodiment, the radius of the fan-shaped protective wing plate 3 is 0.8 to 1 times the rotation radius of the wellhead cover plate 1, and the central angle of the fan-shaped protective wing plate 3 is 45 to 90 degrees.

[0050] In order to reduce the overall weight of the fan-shaped protective wing plate 3 so that it can be opened with the wellhead cover plate 1, further, in a preferred embodiment, please refer to Figure 1 and Figure 8 The fan-shaped protective wing plate 3 includes an arc frame 301, two straight frames 302, and a steel mesh 303 arranged in the fan-shaped area enclosed by the arc frame 301 and the two straight frames 302; the fan-shaped protective wing plate 3 is vertically connected to the edge of the wellhead cover plate 1 through the straight frames 302. The arc frame 301 of the fan-shaped protective wing plate 3 is provided with an end rod guide groove 3011 along its arc.

[0051] Further, in a preferred embodiment, see Figure 10 and Figure 11 An end rod guide groove 3011 is provided along the arc line of the arc frame 301 of the fan-shaped protective wing plate 3, and the two ends of the end rod 402 are slidably connected to the end rod guide groove. The end rod guide groove 3011 guides and damps the end rod 402, thereby reducing the falling speed of the end rod 402 to prevent the end rod 402 from hitting the construction personnel entering and exiting the well.

[0052] Further, in a preferred embodiment, see Figure 5 and Figure 6 The relay rod 603 is arc-shaped and its arc portion is arranged away from the power receiving plate 604, so that the power receiving plate 604 will not contact the relay rod 603 when sliding between the first contact rod 601 and the second contact rod 602, thereby improving the service life of the power receiving plate 604.

[0053] In order to make the electromagnet 7 better magnetically matched with the end rod 402, further, in a preferred embodiment, please refer to Figure 8 and Figure 9 The cover base 2 is provided with limiting tongues 201 on both sides of the inner wall near the opening and closing end 101, and the upper surface of the limiting tongues 201 is provided with end rod brackets 202. When the wellhead cover 1 is in a closed state, its opening and closing end 101 falls on the limiting tongues 201, and the end rod 402 falls into the end rod bracket 202 and abuts against the electromagnet 7.

[0054] In order to reduce the weight of the wellhead cover 1 so as to facilitate opening while maintaining good strength, further, in a preferred embodiment, please refer to Figure 2 and Figure 11The wellhead cover plate 1 is a square grid plate, and the wellhead cover plate 1 is made of lightweight profiles. A reflective warning strip 102 is provided on the outer edge of the wellhead cover plate 1.

[0055] Further, in a preferred embodiment, see Figure 4 、 Figure 7 and Figure 9 The power receiving plate 604 is formed by bending an elastic metal sheet and has an arched cross-section; the arched portion of the power receiving plate 604 is in sliding contact with the first contact rod 601 or the second contact rod 602, so that the power receiving plate 604 can maintain good contact with the first contact rod 601 or the second contact rod 602 and be conductively connected to the first contact rod 601 or the second contact rod 602.

[0056] In order to facilitate the installation of the device of the present invention at the wellhead, further, in a preferred embodiment, please refer to Figure 2 and Figure 11 The outer edge of the cover base 2 is provided with a mounting flange 203 , and the four corner ends of the mounting flange 203 are provided with screw holes.

[0057] Furthermore, in a preferred embodiment, the safety angle of the wellhead cover 1 is 30-35°.

[0058] In order to prevent the construction workers entering and leaving the well from touching the components of the linkage power receiving assembly 6 and causing the risk of electric shock, further, in a preferred embodiment, please refer to Figure 4 The utility model also includes an insulated flexible protective sleeve 9 that can freely extend and retract along the sliding direction of the upper support rod 502. The flexible protective sleeve 9 is sleeved on the telescopic support rod 5, and the linked power receiving component 6 is accommodated in the flexible protective sleeve 604.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A temporary wellhead protection device capable of preventing the danger of falling, comprising a power source, a cover base disposed within the wellhead, a wellhead cover having one end hinged to one side of the interior of the cover base and the other end overlapped with the other side of the interior of the cover base to form an open and closed end, characterized in that: Also includes: Sector-shaped protective wing plates, wherein the sector-shaped protective wing plates are vertically connected to the edges of both sides of the wellhead cover plate and the center of the circle of the sector-shaped protective wing plates coincides with the hinged rotation axis of the wellhead cover plate; An opening and closing end protection assembly, comprising a spring drum disposed within the cover base near the opening and closing end and capable of rolling the flexible protection net downward, and a magnetic end rod, one end of which is wound around the spring drum and the other end of which is fixedly connected to the lower edge of the end rod; Telescopic support rods are arranged on both sides of the wellhead cover plate, and the telescopic support rods include a lower support rod with one end hingedly connected to the inside of the cover plate base, an upper support rod with one end slidably connected to the lower support rod and the other end hingedly connected to the bottom edge of the wellhead cover plate; an electromagnet, which is disposed at the lower edge of the opening and closing end of the wellhead cover and is electrically connected to the first contact rod for magnetically engaging with the end rod; an alarm, the alarm being disposed on a side of the cover base away from the engagement end and being electrically connected to the second contact rod; and A linkage power receiving component, wherein the linkage power receiving component is arranged on the telescopic support rod on either side, the linkage power receiving component includes an insulated relay rod, a first contact rod and a second contact rod that are conductive and arranged along the sliding direction of the upper support rod, and an insulated power receiving plate fixedly arranged on the lower support rod; one end of the first contact rod is insulated and fixedly connected to the upper support rod, and the other end is vertically fixedly connected to one end of the relay rod; one end of the second contact rod is insulated and slidably connected to the lower support rod, and the other end is vertically fixedly connected to the other end of the relay rod; the wellhead cover drives the telescopic support rod to extend and retract during the opening and closing process The electric plate is compressed so that the power receiving plate is in sliding contact with the first contact rod or the second contact rod. When the wellhead cover is in a closed state and the opening angle is less than or equal to the safety angle, the power receiving plate is only in sliding contact with the first contact rod. The power receiving plate, the first contact rod and the electromagnet are connected in series before the two poles of the power supply to form a closed circuit, so that the electromagnet is energized to generate magnetic force to attract the end rod. When the opening angle of the wellhead cover is greater than the safety angle, the power receiving plate is only in sliding contact with the second contact rod. The power receiving plate, the second contact rod and the alarm are connected in series before the two poles of the power supply to form a closed circuit, so that the alarm is energized to emit an audible and visual alarm.

2. The temporary protection device for a wellhead capable of preventing the danger of falling as claimed in claim 1, characterized in that: The radius of the fan-shaped protective wing plate is 0.8 to 1 times the rotation radius of the wellhead cover plate, and the central angle of the fan-shaped protective wing plate is 45 to 90 degrees.

3. The temporary protection device for a wellhead capable of preventing the danger of falling as claimed in claim 1, characterized in that: The fan-shaped protective wing plate includes an arc frame, two straight frames, and a wire mesh arranged in the fan-shaped area enclosed by the arc frame and the two straight frames; the fan-shaped protective wing plate is vertically connected to the edge of the wellhead cover plate through the straight frames.

4. The temporary protection device for a wellhead capable of preventing the danger of falling as claimed in claim 3, characterized in that: An end rod guide groove is provided along the arc line of the arc frame of the fan-shaped protective wing plate, and both ends of the end rod are slidably connected to the end rod guide groove.

5. The temporary protection device for a wellhead capable of preventing the danger of falling as claimed in claim 1, characterized in that: The relay rod is arc-shaped and its arc portion is arranged away from the power receiving plate, so that the power receiving plate will not contact the relay rod when sliding between the first contact rod and the second contact rod.

6. The temporary protection device for a wellhead capable of preventing the danger of falling as claimed in claim 1, characterized in that: The cover base is provided with limiting tongues on both sides of the inner wall near the opening and closing end, and the upper surface of the limiting tongues is provided with end rod brackets. When the wellhead cover is in a closed state, its opening and closing end falls on the limiting tongues, and the end rod falls into the end rod bracket and abuts against the electromagnet.

7. The temporary protection device for a wellhead capable of preventing the danger of falling as claimed in claim 1, characterized in that: The wellhead cover plate is a square grid plate, and the wellhead cover plate is made of lightweight profiles. A reflective warning strip is provided on the outer edge of the wellhead cover plate.

8. The temporary protection device for a wellhead capable of preventing the danger of falling as claimed in claim 1, characterized in that: The power receiving plate is formed by bending an elastic metal sheet and has an arched cross section; the arched portion of the power receiving plate is in sliding contact with the first contact rod or the second contact rod.

9. The temporary protection device for a wellhead capable of preventing the danger of falling as claimed in claim 1, characterized in that: The outer edge of the cover base is provided with a mounting flange, and the four corner ends of the mounting flange are provided with screw holes.

10. The temporary protection device for a wellhead capable of preventing the danger of falling according to claim 1, characterized in that: It also includes an insulated flexible protective sleeve that can freely expand and contract along the sliding direction of the upper support rod. The flexible protective sleeve is sleeved on the telescopic support rod, and the linked power receiving component is accommodated in the flexible protective sleeve.

Images