Well lid opener

Abstract

The utility model provides a well lid opener, which relates to the technical field of engineering and comprises a rod body, a key head and a hook head. The rod body is a pinch bar part of the well lid opener and is generally a steel pipe, the outer diameter of the rod body is 25-30 mm, and the wall thickness of the steel pipe is not smaller than 3 mm. The key head is a main functional area of the well lid opener and specifically comprises a carrier, a prying hook, a supporting shaft and a limiting rod. The hook head is an auxiliary function area of the well lid opener, and specifically, the hook head comprises a hook body, a hook and a deicing cone. The manhole cover opener is specially designed for a manhole cover with an elastic lock mechanism and an inverted-L-shaped key hole, and has the characteristics of comprehensive functions of opening, moving, overturning, deicing and the like. The opener is simple in structure, flexible and durable, the opening principle of the opener and the pry bar is the lever principle, but the opener is provided with the supporting shaft, an effective fulcrum can be provided, and the situation that prying cannot be conducted or an additional fulcrum does not need to be arranged is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering technical field, and more particularly, to a well lid opener. BACKGROUND

[0002] Among different material well covers, cast iron well cover is the most widely used one, which has the characteristics of high strength, wear resistance and corrosion resistance. Generally, in order to facilitate opening, a keyhole structure is provided on the well cover, and the corresponding opening tool can be used to open the well cover.

[0003] The traditional through-hole type well cover keyhole is suitable for well covers without sealing requirements, and a T-shaped key can be used to open it: insert the key into one of the keyholes, rotate the key by 90 degrees, and pull it upwards to take out the well cover from the well seat. Another traditional recess type well cover keyhole can be opened using an L-shaped key: insert the flat head of the key into the recess and press against the top of the recess, and the curved part of the key is pressed against the well seat. Pull the lever to lift the well cover out of the well seat.

[0004] In addition, different structures of well covers and keyholes require different opening tools. For example, the well cover with a spring lock structure in patent "CN217537070U" is provided. The well cover is provided with a spring lock, and the main structure of the spring lock is a C-shaped spring lock arm. One end of the lock arm is connected to the well cover, and the other end is provided with a lock head. The well seat is provided with a locking surface. The well cover is provided with a keyhole. When the well cover is closed, the lock head is in contact with the locking surface, and the spring lock arm is in a compressed deformation state. The directional deformation force of the spring lock arm is used to press the lock head against the locking surface, achieving the locking of the well cover. When opening is needed, the well cover is lifted with enough force, causing the lock head to slide along the locking surface and further compress the spring lock arm, until the lock head is out of the locking surface and finally away from the well seat, thus achieving opening.

[0005] The locking force of the above-mentioned well cover is large when it is closed, and a large prying force is required to achieve opening. Therefore, this well cover with a C-shaped spring lock structure is usually provided with a larger "type keyhole to facilitate prying. However, traditional T-shaped or L-shaped keys are not suitable for opening this well cover, and other tools are needed to assist.

[0006] Therefore, there is an urgent need for a well cover opener specifically for "type keyholes to improve the prying ability of the opener and efficiently open the well cover. UTILITY MODEL CONTENTS

[0007] Therefore, the utility model provides a well cover opener for "type keyholes to solve the problem of how to improve the prying ability of the opener and facilitate the opening of the well cover.

[0008] The utility model provides a kind of well lid opener, comprising: pole body;Key head, it is arranged in one end of the pole body;Hook head, it is arranged in the other end of the pole body away from key head.

[0009] Further, the pole body is the pry bar part of well lid opener, usually steel pipe, outer diameter 25~30mm, the wall thickness of steel pipe is not less than 3mm;

[0010] Further, the key head includes carrier, crowbar, support shaft and limiting rod;

[0011] The tail end of the carrier is welded with the pole body, the carrier is provided with first drilling hole, and the carrier is used to connect the key head and the pole body;

[0012] The crowbar is arranged at the front end of the carrier, and the crowbar and the carrier are an integral structure, which is cut from a Q345 steel plate with a thickness of 20mm, the crowbar is L-shaped, which includes a pry arm and a pry head, the pry arm is longer than the pry head, the included angle between the pry arm and the pry head is 85°, and the pry arm is connected with the carrier;

[0013] The support shaft is arranged at the lower part in front of the carrier, and the support shaft is welded with the carrier;

[0014] The limiting rod is arranged at the connecting position between the tail of the crowbar and the carrier, and the limiting rod is welded with the carrier.

[0015] Further, the support shaft is a solid steel rod with a diameter of 25mm and a length of not less than 100mm, and the horizontal distance between the support shaft and the front end of the pry head is 5.5cm~6cm; the distance between the support shaft and the top end of the pry head is 7.5cm~8cm.

[0016] Further, the limiting rod is a solid steel rod with a diameter of 10mm and a length of 80mm, and the horizontal distance between the limiting rod and the front end of the pry head is 4.5cm~5cm; the distance between the limiting rod and the top end of the pry head is 2cm~2.5cm.

[0017] Further, the limiting rod is a round rod as a whole, and the shape of the limiting rod corresponds to the first drilling hole.

[0018] Further, the hook head includes a hook body, a hook and an ice-removing cone;

[0019] One end of the hook body is welded with the pole body, the hook body is provided with a second drilling hole, and the hook body is used to connect the hook head and the pole body;

[0020] The hook is arranged at the front end of the hook body, the hook body and the hook are an integral structure, the hook is cut from a Q345 steel plate with a thickness of 20 mm, the hook is L-shaped and comprises a hook rod and a hook head, the hook rod is longer than the hook head, and the hook rod and the hook head are at an angle of 60 degrees, and the hook rod is connected with the hook body;

[0021] The deicing cone is welded with the hook body.

[0022] Further, the deicing cone is a solid steel rod with a diameter of 15 mm and a length of 150 mm.

[0023] Further, the deicing cone is a whole round rod, and the shape of the deicing cone corresponds to the second drilling hole.

[0024] Compared with the prior art, the utility model has the advantages that,

[0025] 1. The opener is specially designed for the manhole cover with the elastic lock mechanism and the "U"-shaped keyhole, and has the comprehensive functions of opening, moving, turning and deicing.

[0026] 2. The opening principles of the opener and the pry bar are the same, i.e. the lever principle, but the opener is provided with a supporting shaft, so that an effective fulcrum is provided, and the situation that the manhole cover cannot be pried or an additional fulcrum needs to be provided is avoided.

[0027] 3. The pry hook at the front end of the opener cooperates with the limiting rod to effectively clamp the manhole cover, and in cooperation with the supporting shaft, the manhole cover can be easily pried and turned by using the lever principle.

[0028] 4. The opener is provided with the hook for dragging, and the manhole cover with a larger size and weight and a hinge can be conveniently opened to the maximum at a suitable position and angle by the dragging mode. BRIEF DESCRIPTION OF DRAWINGS

[0029] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the application. Furthermore, the same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0030] Figure 1 The structure schematic view of the manhole cover opener provided by the utility model is shown in Fig. 1.

[0031] Figure 2 The structure schematic view of the key head of the manhole cover opener provided by the utility model is shown in Fig. 2.

[0032] Figure 3 The position and size schematic view of the supporting shaft and the limiting rod of the manhole cover provided by the utility model is shown in Fig. 3.

[0033] Figure 4 The utility model provides a well lid opener - hook head structure schematic view is provided for the utility model,

[0034] Figure 5 The utility model provides a well lid opener opens well lid's use schematic view,

[0035] Figure 6 The utility model provides a well lid opener, Figure 4 The utility model provides a well lid opener,

[0036] Figure 7 The utility model provides a well lid opener, Figure 1 ;

[0037] Figure 8 The utility model provides a well lid opener, Figure 2 ;

[0038] Figure 9 The utility model provides a well lid opener, Figure 6 、 Figure 7 The utility model provides a well lid opener,

[0039] Figure 10 The utility model provides a well lid opener, Figure 1 ;

[0040] Figure 11 The utility model provides a well lid opener, Figure 2 ;

[0041] Figure 12 The utility model provides a well lid opener, Figure 9 、 Figure 10 The utility model provides a well lid opener,

[0042] Figure: 1 - pole body;2 - key head;3 - hook head;4 - flange top surface;5 - stopper;2a - carrier;2b - crowbar;2b1 - pry arm;2b2 - pry head;2c - support shaft;2d - limit rod;3a - hook body;2b - hook;3b1 - hook rod;3b2 - hook head;3c - deicing cone. DETAILED DESCRIPTION

[0043] The specific implementation of the utility model will be described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0044] In the description of the present application, it needs to be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0046] In the description of the present application, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] Referring to Figures 1-3 As shown in the drawings, the embodiment provides a well lid opener composed of a rod body 1, a key head 2 and a hook head 3;

[0048] The rod body 1 is the pry bar part of the well lid opener, which is usually a steel pipe with an outer diameter of 25-30mm and a wall thickness of not less than 3mm;

[0049] The key head 2 is the main functional area of the well lid opener. Specifically, the key head 2 includes a carrier 2a, a crowbar 2b, a support shaft 2c and a limiting rod 2d;

[0050] The above-mentioned carrier 2a is the connecting structure of the key head 2 and the rod body 1, and the tail end of the carrier 2a is connected with one end of the rod body 1 in a welded manner;

[0051] The above-mentioned crowbar 2b is located at the front end of the carrier 2a and is an L-shaped hook, which can be divided into a pry arm 2b1 and a pry head 2b2 in structure. Among them, the pry arm 2b1 is longer and the pry head 2b2 is shorter; the pry arm 2b1 is connected with the carrier 2a; the pry arm 2b1 and the pry head 2b2 form an 85° angle;

[0052] The support shaft 2c is a solid steel rod with a diameter of 25 mm and a length of not less than 100 mm. It is located at the lower front end of the carrier 2a. Specifically, the horizontal distance between the support shaft 2c and the front end of the pry head 2b2 is 5.5-6 cm, and the distance between the support shaft 2c and the top end of the pry head 2b2 is 7.5-8 cm.

[0053] The limiting rod 2d is a solid steel rod with a diameter of 10 mm and a length of 80 mm. It is located at the tail of the pry hook 2b and the joint between the pry hook 2b and the carrier 2a. Specifically, the horizontal distance between the limiting rod 2d and the front end of the pry head 2b2 is 4.5-5 cm, and the distance between the limiting rod 2d and the top end of the pry head 2b2 is 2-2.5 cm.

[0054] The carrier 2a and the pry hook 2b are an integral structure, which are cut from a Q345 steel plate with a thickness of 20 mm. After cutting and shaping, quenching or carburizing treatment is performed to improve the hardness and wear resistance of the pry hook 2b.

[0055] The support shaft 2c and the limiting rod 2d are connected to the corresponding positions of the carrier 2a by welding.

[0056] The limiting rod 2d is a whole round rod, which needs to be drilled at the corresponding position of the carrier 2a, and then welded after being perforated.

[0057] The function of the pry hook 2b is to hook the stop block in the keyhole of the manhole cover during the process of prying and transferring the manhole cover.

[0058] The function of the support shaft 2c is to provide a working fulcrum and a pivot for the opener during the process of prying and transferring the manhole cover.

[0059] The function of the limiting rod 2d is to clamp the manhole cover together with the pry hook 2b during the process of transferring the manhole cover, preventing the manhole cover from shaking or falling during the transfer process.

[0060] Referring to Figure 4 The hook head 3 is an auxiliary functional area of the manhole opener. Specifically, the hook head 3 includes a hook body 3a, a hook 2b, and a deicing cone 3c.

[0061] The hook body 3a is a connecting structure between the hook head 3 and the rod body 1. One end of the hook body 3a is connected to one end of the rod body 1 by welding.

[0062] The hook 3b is located at the front end of the hook body 3a and is an L-shaped hook. It can be divided into a hook rod 3b1 and a hook head 3b2 in structure. The hook rod 3b1 is longer, and the hook head 3b2 is shorter. The hook rod 3b1 is connected to the hook body 3a, and the hook rod 3b1 and the hook head 3b2 form a 60° angle.

[0063] The above-mentioned deicing cone 3c is a solid steel rod with a diameter of 15 mm and a length of 150 mm, one end of which is pointed, and is welded to the hook body 3a;

[0064] The hook body 3a and the hook 3b are an integral structure and are cut from a Q345 steel plate with a thickness of 20 mm.

[0065] The deicing cone 3c is a whole round rod, and the hook body 3a needs to be drilled, and the deicing cone 3c is welded after being drilled.

[0066] Referring to Figures 5-12 The functions and use modes that can be achieved by the manhole cover opener are as follows:

[0067] The opening function refers to the way of prying to remove the manhole cover with elastic locks from the well seat. Specifically:

[0068] The pry hook 2b is inserted into the keyhole of the manhole cover, the support shaft 2c is placed on the top surface 4 of the well seat flange or the road surface, the rod body 1 is held close to one end of the hook head 3, the rod body 1 is pulled backward, the pry head 2b2 of the pry hook 2b contacts the block 5 of the keyhole, the rod body 1 is pressed backward and downward, the pry head 2b2 of the pry hook 2b contacts the block 5 of the keyhole, and the manhole cover is moved upward through the lever action, so that the lock head of the cover plate elastic lock arm is separated from the well seat, and the manhole cover is opened.

[0069] The transfer function refers to the use of the opener to move the manhole cover without a hinge away from the well mouth. Specifically:

[0070] After the opening operation is completed, the pry hook 2b is kept in the keyhole and the pry head 2b2 contacts the keyhole block, the opener is pulled obliquely upward, the manhole cover is dragged to move, the lock head of all the elastic lock arms of the manhole cover is separated from the well seat, the pry hook 2b is further inserted into the keyhole, until the limiting rod 2d contacts the top surface 6 of the manhole cover, the rod body 1 is pressed downward, the manhole cover is completely suspended, the opener is rotated around the support shaft 2c and drives the manhole cover to move away from the well directly above, and the rod body 1 is lifted to place the manhole cover on the ground.

[0071] The turnover function refers to the use of the opener to open the manhole cover with a hinge to the maximum angle. Specifically:

[0072] After the opening operation is completed, the pry hook 2b of the opener is taken out of the keyhole, the opener is reversed, the rod body 1 is held close to one end of the key head 2, it is moved to the other side of the manhole cover, the hook 3b is inserted into the keyhole of the manhole cover, the hook head 3b2 hooks the block of the keyhole, the opener is pulled backward, and the manhole cover is rotated around the hinge. Until the manhole cover is completely opened.

[0073] The deicing function mainly refers to the use of the deicing cone 3c to chisel ice in the keyhole; in addition, a small amount of silt and fallen leaves in the keyhole can also be cleaned.

[0074] Specific Implementation Example 1

[0075] like Figure 1 The image shows the manhole cover opener described in this patent. It consists of a rod body 1, a key head 2, and a hook head 3.

[0076] The pole body 1 is a steel pipe with a length of 1 meter; the key head 2 is welded to the left end face of the pole body 1 and includes four structures: carrier 2a, pry hook 2b, support shaft 2c, and limit rod 2d; the hook head 3 is welded to the right end face of the pole body 1 and includes three structures: hook body 3a, hook 2b, and de-icing cone 3c.

[0077] This manhole cover opener can be used to open metal manhole covers with elastic locking arms, and to transfer or flip the manhole cover. The specific functions, usage scenarios, and methods of the opener are as follows:

[0078] First, if there is ice or foreign objects in the keyhole of the manhole cover that needs to be opened, the de-icing cone of the opener can be used to clean it so that the pry bar or hook can be inserted into the keyhole.

[0079] Then, use a manhole opener to open the manhole cover by disengaging the locking head of the elastic locking arm from the locking surface of the manhole seat. Specifically, insert the pry bar into the keyhole of the manhole cover so that the pry bar contacts the stop block of the keyhole; place the support shaft on the top surface of the manhole seat flange or on the road surface; press down on the rod body, and using leverage, move the manhole cover upward through the pry bar, thereby disengaging the locking head of the manhole cover from the locking surface of the manhole seat, thus opening the manhole cover.

[0080] Finally, use a manhole opener to move the manhole cover away from the manhole area to facilitate construction. At this point, there are two scenarios:

[0081] If there is no hinge connection between the manhole cover and the manhole base, use the key head side of the manhole opener to pry and rotate the manhole cover. Specifically: insert the pry hook of the manhole opener into the keyhole until the limiting rod contacts the top surface of the manhole cover; press down on the rod to completely suspend the manhole cover; using the support shaft as an axis, rotate the manhole opener to move the manhole cover away from directly above the inspection well; lift the rod to place the manhole cover on the ground.

[0082] If the manhole cover and base are hinged, use the hook head of the manhole opener to pull the cover open to its maximum opening angle. Specifically: insert the hook into the keyhole of the manhole cover and hook the hook head onto the stop block of the keyhole; hold the lever of the manhole opener and pull it backward, causing the manhole cover to rotate around the hinge. Continue until the manhole cover is opened to its maximum angle.

[0083] Compared with existing technologies, the advantages of this utility model are that the opener, specifically designed for manhole covers with elastic locking mechanisms and U-shaped keyholes, has comprehensive functions such as opening, moving, flipping, and de-icing. It has a simple structure, is ingenious and durable; the opening principle of the opener and the pry bar is the same lever principle, but the opener has its own support shaft, providing an effective fulcrum and preventing situations where it cannot be pried open or where no additional fulcrum is needed; the pry hook and limit rod at the front end of the opener work together to effectively clamp the manhole cover, and with the support shaft, it can easily pry and turn heavier manhole covers using the lever principle; the opener is equipped with hooks for dragging and pulling, making it convenient to open larger and heavier hinged manhole covers to their maximum size by dragging them from a suitable position and angle.

[0084] It will be understood by those skilled in the art that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A manhole cover opener characterized by, The utility model relates to a kind of multi-purpose tool, including: Shaft body; Key head, which is arranged at one end of the shaft body; Hook head, which is arranged at the other end of the shaft body away from the key head; The key head includes carrier, crowbar, support shaft and limiting rod; The tail end of the carrier is welded with the shaft body, the carrier is provided with a first drill hole, and the carrier is used to connect the key head and the shaft body; The crowbar is arranged at the front end of the carrier, and the crowbar and the carrier are integrated structure, the crowbar is L-shaped, which includes pry arm and pry head, the pry arm is longer than the pry head, the pry arm and pry head are 85°, and the pry arm is connected with the carrier; The support shaft is arranged at the lower part in front of the carrier, and the support shaft is welded with the carrier; The limiting rod is arranged at the connecting place of the tail of the crowbar and the carrier, and the limiting rod is welded with the carrier; The limiting rod is a whole round rod, and its shape corresponds to the first drill hole.

2. A manhole cover opener according to claim 1, characterised in that The hook head includes hook body, hook and deicing cone; One end of the hook body is welded with the shaft body, the hook body is provided with a second drill hole, and the hook body is used to connect the hook head and the shaft body; The hook is arranged at the front end of the hook body, and the hook body and the hook are integrated structure, the hook is L-shaped, which includes hook rod and hook head, the hook rod is longer than the hook head, the hook rod and hook head are 60°, and the hook rod is connected with the hook body; The deicing cone has a sharp end, and the deicing cone is welded with the hook body.

3. A manhole cover opener according to claim 2, wherein, The deicing cone is a whole round rod, and its shape corresponds to the second drill hole.

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