A pump station rescue and maintenance auxiliary lifting device

Abstract

This invention discloses an auxiliary lifting device for emergency repair of pump stations, comprising a frame body vertically slidably mounted on the guide rail of a submersible sewage pump coupler inside the well. A lifting platform is matched and installed on the frame body, located directly above the submersible sewage pump. An annular connecting seat is matched and installed in the middle of the lifting platform, extending downward through the lifting platform. A connector for connecting to the traction end of a lifting device is installed inside the annular connecting seat. The connector extends downward out of the lifting platform and is hinged to a hook, which matches the lifting ring on the top of the submersible sewage pump. A hook control mechanism is matched and installed at the bottom of the annular connecting seat. This invention has a unique structure and ingenious design, which can effectively solve the problems of difficult and time-consuming manual hooking of the lifting ring when lifting submersible sewage pumps for repair, especially the problem that water must be drained from the pump lifting ring before lifting the submersible sewage pump.

Description

Technical Field

[0001] This invention belongs to the technical field of pump station emergency repair and maintenance tools, specifically relating to an auxiliary lifting device for pump station emergency repair and maintenance. Background Technology

[0002] Urban drainage pumping stations are important infrastructure for ensuring the normal operation of cities and preventing urban flooding and environmental pollution. Among them, sewage pumping stations and rainwater pumping stations undertake the key tasks of collecting, transporting and lifting urban rainwater and sewage. As the core operating equipment of the pumping station, the working status of the submersible sewage pump directly determines the efficiency of the entire drainage system. Submersible sewage pumps are usually installed using a coupler method, sinking into the bottom of the pump house along a fixed guide rail. This installation structure means that when the pump fails, it must be vertically lifted out of the well to the ground for maintenance.

[0003] The current method of lifting out submersible sewage pumps for maintenance is usually carried out by directly hooking them with an electric hoist. The operator needs to stand at the pump house wellhead and adjust the position and angle of the hook by visual observation so that it can be hooked with the top lifting ring of the submersible sewage pump located at the bottom of the well. However, pump houses are generally 7-12 meters deep, limiting the operator's field of vision and making it difficult to accurately determine relative positions. This often requires repeated adjustments to the electric hoist's lifting and lowering and the hook angle, making operations difficult, time-consuming, and severely impacting emergency repair efficiency. For sewage pumping stations, submersible pumps are constantly submerged, making the lifting rings unobservable. Before lifting them out for maintenance, the remaining pumps in the pump house must be started or a temporary water pump must be installed to lower the water level in the pump house to the top of the submersible pump, making the lifting rings visible before hooking can be performed. This lowering process takes anywhere from tens of minutes to several hours, consuming valuable emergency time. In extreme emergencies, such as when all pumps in the pump house malfunction or are overloaded and cannot operate normally, while external water flow is rapid and the water level continues to rise, existing technologies become unable to lower the water level or complete the hooking underwater. This results in the inability to lift out the faulty pump, install the backup pump, and the pumping station completely loses its drainage capacity, easily leading to secondary disasters such as pipeline backflow, sewage overflow, urban flooding, and even environmental pollution. Summary of the Invention

[0004] In response to the shortcomings and problems of existing pump station emergency repair and maintenance, this invention provides an auxiliary lifting device for pump station emergency repair and maintenance. This device has a unique structure and ingenious design, which can effectively solve the problems of difficult and time-consuming manual hooking of lifting rings when lifting submersible sewage pumps for maintenance, especially when the submersible sewage pumps need to pump water. It can achieve fast, accurate and reliable "blind hanging", which can greatly improve the efficiency of emergency repair.

[0005] The solution adopted by this invention to solve its technical problem is: an auxiliary lifting device for emergency repair of pump stations, comprising a frame body vertically slidably installed on the guide rail of the submersible sewage pump coupler inside the well, a lifting platform matched and installed on the frame body, the lifting platform being located directly above the submersible sewage pump, an annular connecting seat matched and installed in the middle of the lifting platform, the annular connecting seat penetrating downward through the lifting platform, a connector for connecting to the traction end of lifting equipment installed inside the annular connecting seat, the connector extending downward out of the lifting platform and hinged to a hook, the hook being connected to a lifting ring on the top of the submersible sewage pump. Matching; the bottom of the annular connecting seat is fitted with a hook control mechanism, which includes an elastic element and a traction hook assembly. The elastic element is connected to the hook and is used to drive the hook to rotate around the hinge end to the back side in its natural state, maintaining the initial position for avoidance and exchange. The driving end of the traction hook assembly is connected to the hook, and the operating end of the hook control mechanism extends upward out of the wellhead. Through the operating end of the hook control mechanism, the hook control mechanism can be controlled to overcome the elastic force of the elastic element and drive the hook to rotate from the initial position to the working position where it engages with the lifting ring hook.

[0006] A support frame is provided between the hook and the annular connecting seat. The connector is installed in the annular connecting seat through the support frame. One end of the elastic element is installed at the end of the support frame near the back of the hook, and the other end of the elastic element is fixedly connected to the back of the hook body. The traction hook assembly is installed at the end of the support frame away from the elastic element.

[0007] The traction hook assembly includes an L-shaped drive rod, a connecting rope, and a traction rope. The right-angle end of the drive rod is hinged and installed in the support frame, with the tail end of the drive rod facing downwards. It is connected to the root of the straight handle of the hook through the connecting rope, and the connecting rope is always taut. One end of the traction rope is connected to the head end of the drive rod, and the other end of the traction rope extends upwards out of the wellhead.

[0008] The support frame has symmetrical connecting parts at the middle of its left and right ends. The connecting piece is located between the two connecting parts and is fixedly connected to the support frame on the same side. A guide rod is vertically installed on the outer end face of the connecting part. The guide rod passes outward through the annular connecting seat and is locked together with the annular connecting seat.

[0009] The hoisting platform is slidably mounted on the hanger body and is locked to the hanger body with bolts.

[0010] The hoisting platform has a circular window in the middle. The annular connecting seat is rotatably installed in the circular window and is connected to a horizontal angle adjustment mechanism. The operating end of the horizontal angle adjustment mechanism extends upward out of the wellhead. The operating end of the horizontal angle adjustment mechanism can control the horizontal angle adjustment mechanism to drive the annular connecting seat to rotate at a fixed angle, thereby adjusting the horizontal angle of the hook.

[0011] The submersible pump coupler guide rail is composed of two U-shaped guide rails with openings facing each other. The left and right sides of the bracket body are symmetrically provided with adapter support mechanisms. The adapter support mechanism includes adapter brackets symmetrically installed on the left and right sides of the hanger body. The outer end of the adapter bracket is provided with a support wheel set that matches and is inserted into the U-shaped guide rail on the same side. The adapter bracket is slidably connected to the hanger body on the adjacent side. A pushing component is provided between the adapter bracket and the hanger body on the adjacent side. In its natural state, the pushing component will push the adapter bracket outward and move it parallel away from the hanger body, so that the support wheel set is kept inserted into the U-shaped guide rail.

[0012] The support wheel assembly includes a central support wheel and side support wheels. Two side support wheels are rotatably mounted on the adapter bracket at vertical intervals, and the two side support wheels are spaced apart in the horizontal direction. When the hanger body is in a horizontal state, the two side support wheels abut against the left and right inner groove walls of the U-shaped guide rail, respectively. The central support wheel is rotatably mounted on the adapter bracket between the two side support wheels, and the central support wheel abuts against the bottom inner wall of the U-shaped guide rail under the action of the jacking assembly.

[0013] The beneficial effects of the present invention: The auxiliary lifting device for emergency repair and maintenance of pumping stations provided by the present invention has the following beneficial effects: 1. The pump station emergency repair auxiliary lifting device provided by this invention, through the use of a hook control mechanism 7 composed of elastic elements and traction hook components, eliminates the need for operators to stand at the wellhead and repeatedly adjust the angle of the electric hoist hook by visual observation. Operators only need to pull the traction rope on the ground at the wellhead to control the hook to accurately hook onto the top ring of the submersible pump. This completely changes the traditional manual visual observation and alignment operation mode, reducing the average hooking operation time from more than ten minutes to less than one minute, achieving rapid lifting of the submersible pump, and significantly improving the efficiency of emergency repairs. In the event of a sudden pump station failure, it can restore the pump station's drainage capacity as quickly as possible, promptly mitigating secondary disasters such as urban flooding, sewage backflow, and environmental pollution caused by the submersible pump shutdown, thus gaining valuable time to ensure the stable operation of the urban drainage system.

[0014] 2. The pump station emergency repair auxiliary lifting device provided by this invention, through its hook control mechanism and horizontal angle adjustment mechanism, enables operators to precisely control the forward and backward swing and horizontal rotation angle of the hook at the wellhead according to the operation on the ground. It can accurately hook the lifting ring of the submersible sewage pump even when the underwater visibility is completely obstructed. It can completely eliminate the time-consuming and equipment-condition-dependent "pumping and dewatering" step, and directly lift the faulty submersible sewage pump from underwater, turning passive into active, filling the gap of existing emergency rescue methods, and greatly improving the emergency rescue capability and operational reliability of the pump station in extreme weather.

[0015] 3. The pump station emergency repair auxiliary lifting device provided by the present invention, by setting an adaptive guide rail walking mechanism composed of a jacking component and an adapter bracket with a support wheel set, can automatically adapt to the slight deformation of the guide rail or the protrusion at the weld caused by long-term use when the lifting body moves up and down along the guide rail of the submersible sewage pump coupler, effectively preventing the risks of rail jamming and overturning that are very easy to occur in traditional rigid structures.

[0016] 4. The pump station emergency repair auxiliary lifting device provided by this invention slides the lifting platform onto the lifting frame body and locks it with bolts. Before use, the bolts can be loosened to slide the lifting platform horizontally according to the actual size of the submersible sewage pump and its lateral positioning on the coupler guide rail. The lateral distance between the platform and the coupler guide rail of the submersible sewage pump can be adjusted. After adjustment, the bolts are tightened. Since the size of the submersible sewage pump and the distance between the coupler guide rail are fixed, this adjustment structure allows the device to be used for emergency repair lifting operations of various models and specifications of submersible sewage pumps. There is no need to design and manufacture special lifting tools for each pump type, which greatly reduces equipment configuration costs and on-site management difficulties.

[0017] 5. The pump station emergency repair auxiliary lifting device provided by the present invention uses a guide rod and locking nut to install the support frame and the annular connecting seat, which allows the position of the connecting seat to be adjusted longitudinally as needed, further enhancing the applicability of the equipment under different pump station site conditions. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the hook control mechanism of the present invention.

[0020] Figure 3 This is a schematic diagram of the horizontal angle adjustment mechanism of the present invention.

[0021] Figure 4 This is a schematic diagram of the hoisting platform structure of the present invention.

[0022] Figure 5 This is a schematic diagram of the tension angle adjustment component of the present invention.

[0023] Figure 6 This is a schematic diagram of the hooking action of the present invention. Figure 7 This is a schematic diagram of the side support wheel of the present invention avoiding the protrusion.

[0024] In the diagram, the following numbers are used: 1 is the hanger body, 11 is the elongated hole, 12 is the locking bolt, 2 is the U-shaped guide rail, 3 is the hoisting platform, 31 is the circular window, 4 is the annular connecting seat, 5 is the connecting piece, 6 is the hook, 7 is the hook control mechanism, 71 is the elastic element, 72 is the traction hook assembly, 721 is the drive rod, 722 is the connecting rope, 723 is the traction rope, 73 is the support frame, 731 is the connecting part, 732 is the guide rod, 733 is the locking nut, 8 is the horizontal angle adjustment mechanism, 81 is the traction angle adjustment assembly, 811 is the pull rope, 812 is the guide wheel, 82 is the elastic angle constraint assembly, 821 is the constraint rope, 822 is the tension spring, 9 is the adapter support mechanism, 91 is the adapter bracket, 92 is the jacking assembly, 93 is the side support wheel, and 94 is the middle support wheel. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0026] In the operation and maintenance of pumping stations, submersible sewage pumps are core equipment, and their maintenance efficiency is directly related to the safety of urban drainage systems. In the existing technology, when a submersible sewage pump malfunctions and needs to be hoisted out for maintenance, the operator must stand at the wellhead and observe with the naked eye and repeatedly adjust the angle of the electric hoist hook to hook it with the top lifting ring of the submersible sewage pump located at a depth of 7-12 meters or even submerged in water. This process is not only difficult to operate and time-consuming, but in sewage pumping stations, it is often necessary to use other water pumps to pump water out beforehand until the top of the pump body emerges from the water surface, which seriously delays the golden time for emergency repairs.

[0027] To solve the above-mentioned technical problems, this embodiment provides an auxiliary lifting device for emergency repair of pumping stations. Its core concept is to use the inherent coupler rail of the submersible sewage pump as a guide and load-bearing foundation, and use an existing electric hoist as a lifting device to lift the submersible sewage pump located in the pump room along the submersible sewage pump coupler rail, thereby significantly shortening the time required for emergency repair.

[0028] like Figure 1-6 As shown, the pump station emergency repair auxiliary lifting device provided in this embodiment includes a gantry body 1 that is vertically slidably installed on the guide rail of the submersible sewage pump coupler inside the well. The submersible sewage pump coupler guide rail is composed of two U-shaped guide rails 2 with openings facing each other; the gantry body 1 serves as the load-bearing frame of the entire device, and a lifting platform 3 is matched and installed on it, with the lifting platform 3 located directly above the submersible sewage pump.

[0029] A ring-shaped connecting seat 4 is installed in the middle of the hoisting platform 3, and the ring-shaped connecting seat 4 extends downward through the hoisting platform 3. A connector 5 is installed inside the ring-shaped connecting seat 4. The connector 5 is used to fix and connect with the lifting equipment above the pump room. In this embodiment, the lifting equipment is an electric hoist. In this embodiment, the connector is the hook shell of the electric hoist. The connector 5 extends downward out of the hoisting platform 3 and is hinged to install a hook 6. The shape and size of the hook 6 match the lifting ring on the top of the submersible pump. Specifically, a lifting shaft 51 is provided longitudinally below the connector 5. The lifting shaft 51 is located below the ring-shaped connecting seat, and connecting plates 52 are fixedly fitted on both the left and right ends of the lifting shaft 51. The top of the connecting plate 52 is welded to the connector. The top of the straight handle of the hook 6 is rotatably fitted on the lifting shaft 51 and can rotate around the lifting shaft 51. The hook back of the hook 6 is far from the submersible pump and the coupler guide rail.

[0030] The bottom of the annular connecting seat 4 is fitted with a hook control mechanism 7. The hook control mechanism 7 includes an elastic element 71 and a traction hook assembly 72. In this embodiment, the elastic element 71 is a stainless steel helical spring. The elastic element 71 is connected to the back of the hook 6. Its function is to drive the hook 6 to rotate around its hinge axis to the back side in its natural state, so that it maintains an initial position that avoids the lifting ring. The driving end of the traction hook assembly 72 is connected to the hook 6, and its operating end extends upward to the wellhead ground. When the operator pulls the operating end at the wellhead, he can control the traction hook assembly 72 to overcome the elastic force of the elastic element 71, thereby driving the hook 6 to rotate from the initial position to the working position that engages with the lifting ring.

[0031] Specifically, in order to achieve a stable connection between the hook 6 and the annular connecting seat 4 and to effectively transmit force, such as Figure 2 As shown, a support frame 73 is provided between the hook 6 and the annular connecting seat 4. The support frame is arranged laterally, and its front and rear ends extend outward from the annular connecting seat 4. The connecting piece 5 is fixedly installed in the annular connecting seat 4 through the support frame 73, as shown. Figure 3 As shown, the support frame 73 has symmetrical connecting parts 731 extending upward into the annular connecting seat 4 at the middle of the left and right ends. The connecting piece 5 is located between the two connecting parts 731 and is fixedly connected to the support frame 73 on the same side by bolts. A guide rod 732 is vertically installed on the outer end face of the connecting part 731. The guide rod 732 is a threaded rod. The guide rod 732 penetrates the inner wall of the annular connecting seat 4 and is locked together with the annular connecting seat 4 by a locking nut 733.

[0032] One end of the elastic element 71 is installed at the end of the support frame 73 near the back of the hook 6, and the other end is fixedly connected to the back of the hook body of the hook 6. The traction hook assembly 72 is installed at the end of the support frame 73 on the side away from the elastic element 71. Specifically, the traction hook assembly 72 includes an L-shaped drive rod 721, a connecting rope 722, and a traction rope 723. The right-angle corner of the L-shaped drive rod 721 is hinged inside the support frame 73. The tail end of the drive rod 721 is set downward and is connected to the root of the straight handle of the hook 6 through the connecting rope 722. In order to ensure the immediacy and reliability of the action, the connecting rope 722 is always taut, eliminating idle travel. One end of the traction rope 723 is connected to the head end of the drive rod 721, and the other end extends upward out of the wellhead for the operator to operate. When the operator pulls the traction rope 723 upward, the drive rod 721 rotates around the hinge point, and its tail end pulls the straight shank root of the hook 6 downward through the connecting rope 722, forcing the hook 6 to overcome the elastic force of the elastic element 71 and rotate towards the U-shaped guide rail to the working position to engage with the lifting ring, thus hooking the lifting ring; when the traction rope 723 is released, the elastic element 71 resets, and the hook 6 automatically returns to the initial avoidance position.

[0033] Furthermore, in order to accommodate submersible sewage pumps of different specifications, such as Figure 4 As shown, the lifting platform 3 is slidably mounted on the hanger body 1. An elongated hole 11 and locking bolts 12 are provided between the lifting platform 3 and the hanger body 1. Before actual application, the bolts can be loosened according to the size of the submersible pump and its lateral positioning on the coupler guide rail. The lifting platform 3 can then be slid horizontally to adjust the lateral distance between it and the submersible pump coupler guide rail. After adjustment, the bolts are tightened. Since the size of the submersible pump and the distance between the coupler guide rail are fixed, this adjustment allows the hanger to be used with various models of submersible pumps, enhancing its versatility.

[0034] During use, when the lifting equipment raises the connecting piece, the connecting piece will drive the hanger body to rise synchronously along the submersible pump coupler guide rail. When the connecting piece lowers, the hanger body will descend synchronously along the submersible pump coupler guide rail under its own weight. During emergency repairs of the submersible pump, firstly, based on the depth of the submersible pump in the pump house, the lifting equipment lowers the hanger body along the submersible pump coupler guide rail to the matching height. Since the installation position of the submersible pump in the pump house is fixed, its relative positional relationship with the submersible pump coupler guide rail is determined and remains unchanged once installed. Therefore, the travel depth of the hanger body as it descends along the guide rail is also fixed. It is fixed, so even if the top of the submersible sewage pump is completely submerged in water and the operator cannot directly observe the position of the lifting ring, as long as the frame body is lowered to the preset fixed depth, the lifting ring will definitely enter the working position of the hook. At this time, the operator only needs to control the hook to swing forward through the elastic element at the wellhead by using the traction rope, so that the hook and the lifting ring on the top of the submersible sewage pump are hooked together, achieving a quick connection. The hook and the lifting ring can be blindly hooked by relying on the preset depth positioning, thus completely eliminating the dependence on manual visual observation and pre-watering operations. Then, the lifting equipment can be started to lift the submersible sewage pump out. Example

[0035] The difference between Example 2 and Example 1 is that, as Figure 3-5 As shown, a circular window 31 is provided in the middle of the hoisting platform 3. The annular connecting seat 4 is rotatably installed in the circular window 31 through a bearing or bushing, so that it can rotate horizontally around its own axis. Furthermore, anti-detachment rings are fixedly fitted on the annular connecting seats 4 on both the upper and lower sides of the hoisting platform 3. The outer diameter of the anti-detachment ring is larger than the diameter of the circular window 31. The anti-detachment ring slides against the hoisting platform 3. When the annular connecting seat rotates, it will drive the two anti-detachment rings to rotate synchronously, thereby effectively preventing the annular connecting seat 4 from detaching from the hoisting platform 3.

[0036] The annular connecting seat 4 is connected to a horizontal angle adjustment mechanism 8. The operating end of the horizontal angle adjustment mechanism extends upward out of the wellhead. Maintenance personnel can control the horizontal angle adjustment mechanism to drive the annular connecting seat to rotate at a fixed angle through the operating end of the horizontal angle adjustment mechanism, thereby adjusting the horizontal angle of the hook.

[0037] In this embodiment, the horizontal angle adjustment mechanism adopts a purely mechanical control mechanism, including a traction angle adjustment component 81 and an elastic angle constraint component 82. The traction angle adjustment component 81 includes a pull rope 811 wound around the outer ring surface of the annular connecting seat above the platform plate. The other end of the pull rope 811 extends towards the guide rail of the submersible pump coupler and is guided upwards through the guide wheel 812 to extend out of the wellhead. When the operator stands at the wellhead and pulls the pull rope, it will drive the annular connecting seat to rotate and release the pull rope. The elastic angle constraint component 82 includes a constraint rope 821 and a tension spring 822. One end of the constraint rope is fixedly installed on the outer ring surface of the annular connecting seat below the platform plate and is wound around the outer ring surface of the annular connecting seat at least once. The winding direction of the constraint rope is opposite to the winding direction of the pull rope. The other end is connected to the first end of the tension spring, and the other end of the tension spring 822 is fixedly installed on the hanger body. When the annular connecting seat rotates to continue winding the constraint rope, the tension spring will be stretched and produce elastic deformation. In use, when the annular connecting seat is driven to rotate and release the pull rope, the annular connecting seat will simultaneously wind up the constraint rope and stretch the tension spring. In use, when the operator pulls the pull rope at the wellhead, the annular connecting seat rotates, releasing the pull rope on one hand and simultaneously winding up the constraint rope and stretching the tension spring on the other, causing the hook to deflect horizontally. When the operator releases the pull rope, the stretched tension spring automatically retracts under the action of elastic restoring force, driving the annular connecting seat to rotate in the opposite direction through the constraint rope, thereby causing the hook to automatically return to the initial angle, and at the same time rewinding the released pull rope back onto the annular connecting seat.

[0038] In practice, operators can observe or refer to pump station records to determine the approximate horizontal angle of the lifting ring of the submersible sewage pump to be repaired. After the crane body descends to the corresponding depth, the operator can precisely control the rotation angle of the annular connecting seat by controlling the pulling length of the pull rope. This allows for remote stepless adjustment of the horizontal direction of the hook, enabling cyclical adjustment of the hook's horizontal angle during underwater blind hanging operations. After each adjustment, a test hang is performed to determine if the hook engagement is successful. For example, if the hook and lifting ring are hooked together, continuing to drive the hook to rotate via the hook control mechanism will encounter resistance and prevent further rotation. The presence of resistance during hook engagement indicates successful engagement. This effectively solves the problem that the lifting ring on the top of existing submersible sewage pumps does not always face the same fixed horizontal angle during installation, making precise alignment impossible underwater by simply swinging the hook back and forth. This achieves true underwater blind hanging, completely avoiding the tedious operation of repeatedly lifting or pumping water for observation due to angle deviations.

[0039] Furthermore, in this embodiment, the pull rope structure can adopt an existing brake rope structure, including an outer tube and an inner core. The outer tube is guided upwards through the guide wheel 812 and extends out of the well opening, and its appearance is fixedly connected to the guide wheel. One end of the inner core is wound around the outer ring surface of the annular connecting seat above the platform plate, and the other end of the inner core is guided upwards through the outer tube and extends out of the well opening, and is connected to a ratchet winding mechanism. The ratchet winding mechanism can pull and wind the inner core in one direction, thereby driving the annular connecting seat to rotate. Example

[0040] The difference between Embodiment 3 and Embodiment 2 is that the left and right sides of the hanger body 1 are symmetrically equipped with adapter support mechanisms. The adapter support mechanism includes an adapter bracket 91. The outer end of the adapter bracket 91 is equipped with a support wheel set. The support wheel set is matched and inserted into the U-shaped guide rail 2 on the same side. The adapter bracket 91 is slidably connected to the hanger body 1 on the adjacent side, and a push assembly 92 is provided between the two. In this embodiment, the push assembly 92 adopts a pre-compressed rectangular helical spring.

[0041] In its natural state, the jacking assembly 92 will continuously push the adapter bracket 91 outward, causing it to move parallel away from the hanger body 1, thereby ensuring that the support wheel assembly always remains inserted and close to the U-shaped guide rail 2, effectively eliminating gaps caused by manufacturing errors or installation deviations.

[0042] like Figure 3 As shown, the support wheel assembly includes two side support wheels 93 rotatably mounted vertically on an adapter bracket 91. These two side support wheels 93 are also spaced a certain distance horizontally. When the hanger body 1 is in a horizontal state, the side support wheels 93 on both sides roll against the left and right inner groove walls of the U-shaped guide rail 2, respectively. A central support wheel 94 is also rotatably mounted on the adapter bracket 91 between the two rows of side support wheels 93. Under the action of the pushing assembly 92, the central support wheel 94 always maintains close contact with the bottom inner wall of the U-shaped guide rail 2.

[0043] When the hanger body 1 moves up and down along the U-shaped guide rail 2, and encounters a slight protrusion caused by welding or local deformation of the guide rail, the traditional rigid slider structure is prone to jamming. However, in this solution, because the support wheel assembly and the guide rail wall are in rolling contact, the resistance is minimal. More importantly, if the middle support wheel encounters a protrusion, the middle support wheel 94 will be squeezed and the force will be transmitted to the adapter bracket 91, causing it to overcome the elastic force of the corresponding side push assembly 92 and slightly retract towards the hanger body 1. Meanwhile, the other two side support wheels continue to remain in close contact with the inner groove wall of the U-shaped guide rail under the action of the push assembly 92. Figure 7As shown, when the side support wheel encounters a protrusion, the side support wheel 93 will drive the entire frame body to tilt around the other side support wheel as it moves along the protrusion, thereby avoiding the protrusion. This adaptive floating structure allows the entire frame body 1 to produce slight deflection and displacement during the lifting process, cleverly overcoming obstacles. After passing through, it will automatically reset under the action of the jacking component 92, thereby fundamentally preventing the occurrence of rail jamming and ensuring the absolute reliability of the lifting operation.

[0044] It should be noted that the above embodiments and accompanying drawings are merely illustrative examples of the core principles and key structures of the "Pump Station Emergency Repair Hanger" of this invention. The accompanying drawings are simplified schematic diagrams, intended to clearly illustrate the structural, process, or data flow relationships related to the innovative points of the technical solution, and are not intended to limit the complete form of the actual product. This specification focuses on the innovative technical means necessary to achieve the invention's objectives and solve the technical problems. While auxiliary or common-sense details such as "dustproof design," "heat dissipation layout," "interface protocol," "conventional filtering," and "standard component selection," which can be implemented without creative effort by those skilled in the art, are not elaborated upon, they should all be understood as naturally included in the specific implementation of this invention and fall within the protection and implementation scope of this technical solution.

Claims

1. A lifting device for emergency repair and maintenance of a pumping station, comprising a lifting frame body slidably mounted vertically on the guide rail of a submersible sewage pump coupler inside the well, characterized in that, A lifting platform is fitted onto the main body of the lifting frame, positioned directly above the submersible pump. An annular connecting seat is fitted into the center of the lifting platform, extending downwards through it. A connector for connecting to the traction end of a lifting device is installed within the annular connecting seat. The connector extends downwards from the lifting platform and is hinged to a hook, which mates with the lifting ring at the top of the submersible pump. A hook control mechanism is fitted at the bottom of the annular connecting seat. This mechanism includes an elastic element and a traction hook assembly. The elastic element is connected to the hook and, in its natural state, drives the hook to rotate around the hinged end to the opposite side, maintaining its initial position for avoidance and adjustment. The drive end of the traction hook assembly is connected to the hook. The operating end of the hook control mechanism extends upwards out of the wellhead. Through the operating end of the hook control mechanism, the mechanism can overcome the elastic force of the elastic element, driving the hook to rotate from its initial position to the working position where it engages with the lifting ring.

2. The auxiliary lifting device for emergency repair and maintenance of pumping stations according to claim 1, characterized in that, A support frame is provided between the hook and the annular connecting seat. The connector is installed in the annular connecting seat through the support frame. One end of the elastic element is installed at the end of the support frame near the back of the hook, and the other end of the elastic element is fixedly connected to the back of the hook body. The traction hook assembly is installed at the end of the support frame away from the elastic element.

3. The auxiliary lifting device for emergency repair and maintenance of pumping stations according to claim 2, characterized in that, The traction hook assembly includes an L-shaped drive rod, a connecting rope, and a traction rope. The right-angle end of the drive rod is hinged and installed in the support frame, with the tail end of the drive rod facing downwards. It is connected to the root of the straight handle of the hook through the connecting rope, and the connecting rope is always taut. One end of the traction rope is connected to the head end of the drive rod, and the other end of the traction rope extends upwards out of the wellhead.

4. The auxiliary lifting device for emergency repair and maintenance of pumping stations according to claim 1, characterized in that, The support frame has symmetrical connecting parts at the middle of its left and right ends. The connecting piece is located between the two connecting parts and is fixedly connected to the support frame on the same side. A guide rod is vertically installed on the outer end face of the connecting part. The guide rod passes outward through the annular connecting seat and is locked together with the annular connecting seat.

5. The auxiliary lifting device for emergency repair and maintenance of pumping stations according to claim 1, characterized in that, The hoisting platform is slidably mounted on the hanger body and is locked to the hanger body with bolts.

6. The auxiliary lifting device for emergency repair and maintenance of pumping stations according to claim 1, characterized in that, The hoisting platform has a circular window in the middle. The annular connecting seat is rotatably installed in the circular window and is connected to a horizontal angle adjustment mechanism. The operating end of the horizontal angle adjustment mechanism extends upward out of the wellhead. The horizontal angle adjustment mechanism can be controlled to drive the annular connecting seat to rotate at a fixed angle to adjust the horizontal angle of the hook.

7. The auxiliary lifting device for emergency repair and maintenance of pumping stations according to claim 1, characterized in that, The submersible pump coupler guide rail is composed of two U-shaped guide rails with openings facing each other. The left and right sides of the bracket body are symmetrically provided with adapter support mechanisms. The adapter support mechanism includes adapter brackets symmetrically installed on the left and right sides of the hanger body. The outer end of the adapter bracket is provided with a support wheel set that matches and is inserted into the U-shaped guide rail on the same side. The adapter bracket is slidably connected to the hanger body on the adjacent side. A pushing component is provided between the adapter bracket and the hanger body on the adjacent side. In its natural state, the pushing component will push the adapter bracket outward and move it parallel away from the hanger body, so that the support wheel set is kept inserted into the U-shaped guide rail.

8. The auxiliary lifting device for emergency repair and maintenance of pumping stations according to claim 7, characterized in that, The support wheel assembly includes a central support wheel and side support wheels. Two side support wheels are rotatably mounted on the adapter bracket at vertical intervals, and the two side support wheels are spaced apart in the horizontal direction. When the hanger body is in a horizontal state, the two side support wheels abut against the left and right inner groove walls of the U-shaped guide rail, respectively. The central support wheel is rotatably mounted on the adapter bracket between the two side support wheels, and the central support wheel abuts against the bottom inner wall of the U-shaped guide rail under the action of the jacking assembly.

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