Pump cover lifting gravity center adjustable device

Abstract

The invention relates to the technical field of pump cover hoisting, in particular to a pump cover hoisting gravity center adjustable device which comprises a hoisting assembly, the hoisting assembly comprises a crane mounting plate, a connecting column is mounted at the bottom of the crane mounting plate, a cross beam is mounted at the bottom of the connecting column, and a gravity center adjusting assembly is mounted in the cross beam. A rigid lifting hook is installed at the bottom of the cross beam, a pump cover is lifted by the rigid lifting hook through a lifting lug, the gravity center adjusting assembly comprises a balancing weight sliding on the cross beam, a clamping assembly used for lifting is installed at the bottom of the cross beam, and the clamping assembly comprises a clamping block arranged at the bottom of the cross beam. And a rotating ring is rotationally connected into the clamping block, and the rigid lifting hook is fixedly connected to the bottom of the rotating ring. The problems that in the prior art, gravity center adjustment is tedious and low in precision, lifting hook connection stability is insufficient, the clamping distance cannot be flexibly adjusted, and a linkage mechanism is lacked can be effectively solved.

Description

Technical Field

[0001] This invention relates to the field of pump cover hoisting technology, and specifically to a pump cover hoisting center of gravity adjustable device. Background Technology

[0002] The pump cover is a core component of pump equipment, installed on the top / end of the pump body. It seals the pump cavity, protects internal moving parts such as the impeller and shaft, and provides an opening for inspection and maintenance. It is typically bolted to the pump body and requires seals to ensure the pump cavity is airtight, preventing leakage of the pumped medium (such as liquids or gases). It must also withstand the pressure, temperature, and other operating loads during pump operation. The material is typically chosen based on the characteristics of the pumped medium, using metals (such as cast iron or stainless steel) or engineering plastics.

[0003] In pump cover hoisting operations, existing technologies mostly employ fixed-structure hoisting devices. These devices connect directly to the pump cover via hooks or lugs at the bottom of a crossbeam, and are lifted and transported using a crane. These devices typically consist of a crane mounting plate, connecting columns, a crossbeam, and fixed hooks. Their core function is to transmit lifting force through rigid connections, making them suitable for pump cover hoisting scenarios with regular structures and stable centers of gravity. Some devices have fixed counterweights or pre-drilled adjustment holes on the crossbeam, allowing for rough adjustment of the center of gravity by manually changing the counterweight positions to accommodate pump covers of different sizes.

[0004] Existing technologies have significant shortcomings and are difficult to meet the lifting requirements under complex working conditions: the pump cover's center of gravity is prone to shift during lifting, and manual adjustment of the counterweight is cumbersome and inaccurate, causing the pump cover to tilt and sway after lifting, which not only affects the efficiency of installation and docking but also poses safety hazards; the connection stability between the hook and the pump cover is insufficient, and there is a lack of an adaptive locking mechanism, which can easily cause relative rotation due to uneven force during lifting, further aggravating the shift in the center of gravity; at the same time, the spacing of the clamping components is mostly fixed and cannot be flexibly adjusted according to the position of the pump cover lifting lugs, resulting in poor versatility, and the lack of a linkage mechanism between center of gravity adjustment, clamp fixation, and spacing adjustment leads to cumbersome operation steps and makes it difficult to guarantee the safety and reliability of lifting. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a pump cover lifting center of gravity adjustable device, which effectively solves the problems of cumbersome and low-precision center of gravity adjustment, insufficient hook connection stability, inflexible clamping spacing, and lack of linkage mechanism in existing technologies.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a pump cover lifting center-of-gravity adjustable device, including a lifting assembly. The lifting assembly includes a crane mounting plate, a connecting column mounted on the bottom of the crane mounting plate, a crossbeam mounted on the bottom of the connecting column, a center-of-gravity adjustment assembly installed inside the crossbeam, and a rigid hook mounted on the bottom of the crossbeam. The rigid hook lifts the pump cover via a lifting lug. The center of gravity adjustment components are symmetrically arranged in two sets. Each center of gravity adjustment component includes a counterweight block that slides on the crossbeam. The counterweight block is used to adjust the center of gravity of the whole. The bottom of the crossbeam is equipped with a clamping assembly for hoisting. The clamping assembly includes a clamping block disposed at the bottom of the crossbeam, a rotating ring rotatably connected inside the clamping block, and a rigid hook fixedly connected to the bottom of the rotating ring.

[0007] Preferably, the center of gravity adjustment assembly includes an adjustment groove formed in the crossbeam, an adjustment motor is fixedly connected in the adjustment groove, an adjustment screw is fixedly connected to the output end of the adjustment motor, a sliding seat is threaded to the side wall of the adjustment screw, and the counterweight is fixedly connected to the top of the sliding seat.

[0008] Preferably, the clamping block has a clamping groove, a fixed shaft is fixedly connected in the clamping groove, a rotating ring is rotatably connected to the side wall of the fixed shaft, and the rotating ring and the fixed shaft are connected by a torsion spring.

[0009] Preferably, the clamping block is provided with a reinforcing component, the reinforcing component including a hydraulic groove formed in the clamping block, a hydraulic plate slidably connected in the hydraulic groove, a toothed plate connected to one side of the hydraulic plate through a connecting plate, a toothed ring meshing with the toothed plate, and the toothed ring being fixedly connected to the side wall of the rotating ring.

[0010] Preferably, a drive groove is provided in the crossbeam, a drive slide plate is slidably connected in the drive groove, the drive groove and the drive slide plate are connected by a return spring, the drive groove and the hydraulic groove are connected by a first hydraulic channel, and the top inclined surface of the drive slide plate abuts against the sliding seat.

[0011] Preferably, a sliding component is provided inside the crossbeam. The sliding component is used to control the sliding of the clamping block. The sliding component includes a T-shaped groove formed at the bottom of the crossbeam. A T-shaped sliding plate is slidably connected in the T-shaped groove. The clamping block is fixedly connected to the bottom of the T-shaped sliding plate.

[0012] Preferably, a piston plate is fixedly connected to the side wall of the T-shaped slide plate, the piston plate is slidably connected in the piston groove, the piston groove is opened in the crossbeam, and the piston groove is connected to the drive groove through the second hydraulic channel.

[0013] Preferably, a control component is provided in the second hydraulic channel. The control component includes an outer T-shaped hollow cylinder fixedly connected to the inner wall of the second hydraulic channel, an inner T-shaped hollow cylinder inserted into the outer T-shaped hollow cylinder, a sealing plate provided on one side of the inner T-shaped hollow cylinder, the outer T-shaped hollow cylinder and the inner T-shaped hollow cylinder being connected by a first spring, and the inner T-shaped hollow cylinder and the sealing plate being connected by a second spring.

[0014] The technical solution provided by this invention has the following advantages compared with the known prior art: This device achieves automated and precise center of gravity adjustment via a motor-driven screw-driven center of gravity adjustment component, completely solving the pain points of cumbersome and low-precision traditional manual adjustment. Symmetrically arranged counterweights can flexibly adapt to the center of gravity offset of pump covers of different specifications, ensuring that the combined center of gravity is vertically aligned with the crane's traction force during lifting, fundamentally preventing pump cover tilting and swaying, and significantly improving installation and docking efficiency. Simultaneously, center of gravity adjustment and clamping locking are carried out synchronously through a hydraulic linkage mechanism, requiring no additional operating steps, greatly simplifying the work process, reducing manual labor intensity, and effectively avoiding the safety hazards of traditional hoisting in industrial pump cover maintenance and installation scenarios, ensuring operational safety and reliability.

[0015] The device innovatively employs a dual locking structure of torsion spring preload and toothed ring engagement, combined with a hydraulically driven adaptive spacing adjustment function, significantly improving hook connection stability and device versatility. The control components precisely manage the hydraulic channel's action sequence, ensuring the hook is locked before spacing adjustment, avoiding linkage conflicts and further enhancing lifting stability. The T-slot and piston-driven spacing adjustment design flexibly adapts to different pump cover lifting lug positions, eliminating the need for frequent changes to the lifting device. The modular and tightly integrated overall structure not only overcomes the lack of a linkage mechanism in existing technologies but also ensures pump cover sealing performance and structural integrity through rigid connections and multiple protective designs, significantly improving the efficiency and safety of lifting operations. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3This is a cross-sectional structural diagram of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B; Figure 6 For the present invention Figure 4 Enlarged structural diagram at point C.

[0018] Reference numerals: 1. Lifting assembly; 11. Crane mounting plate; 12. Connecting column; 13. Crossbeam; 14. Rigid hook; 15. Pump cover; 16. Lifting lug; 2. Center of gravity adjustment assembly; 21. Adjustment groove; 22. Adjustment motor; 23. Adjustment screw; 24. Sliding seat; 25. Counterweight; 3. Clamping assembly; 31. Clamping block; 32. Clamping groove; 33. Fixed shaft; 34. Torsion spring; 35. Rotating ring; 4. Reinforcing assembly; 41. Hydraulic groove; 42. Hydraulic plate; 43. Connecting plate; 44. Gear plate; 45. Gear ring; 46. Hydraulic channel No. 1; 47. Drive groove; 48. Drive slide plate; 49. Return spring; 5. Sliding assembly; 51. T-shaped slide groove; 52. T-shaped slide plate; 53. Piston groove; 54. Piston plate; 55. Hydraulic channel No. 2; 6. Control assembly; 61. Outer T-shaped hollow cylinder; 62. Inner T-shaped hollow cylinder; 63. Sealing plate; 64. Spring No. 1; 65. Spring No. 2. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] The present invention will be further described below with reference to embodiments.

[0021] Example 1: Refer to Figures 1 to 6 , An adjustable center of gravity lifting device for a pump cover includes a lifting assembly 1. The lifting assembly 1 includes a crane mounting plate 11. A connecting column 12 is installed at the bottom of the crane mounting plate 11. A crossbeam 13 is installed at the bottom of the connecting column 12. A center of gravity adjustment assembly 2 is installed inside the crossbeam 13. A rigid hook 14 is installed at the bottom of the crossbeam 13. The rigid hook 14 lifts the pump cover 15 through a lifting lug 16.

[0022] Specifically, the hoisting assembly 1 serves as the core load-bearing and connecting foundation of the device. It is fixed to the external crane via the crane mounting plate 11, and the crane's traction force is transmitted to the crossbeam 13 via the connecting column 12. The clamping assembly 3 at the bottom of the crossbeam 13 is connected to the lifting lug 16 of the pump cover 15 via a rigid hook 14, forming a stable force-bearing link. In the physical environment, the crane provides vertical lifting force, and the hoisting assembly 1 bears the weight of the pump cover 15 as a whole. The rigid structure ensures the smooth transmission of force, while also providing an installation platform for innovative structures such as the center of gravity adjustment assembly 2 and the reinforcing assembly 4. This allows subsequent center of gravity adjustment, locking, and spacing adaptation to be carried out synchronously based on this foundation, ensuring the overall continuity and stability of the hoisting process.

[0023] The lifting assembly 1 adopts a modular rigid connection design, which has wide applicability and reliability in the field of lifting and transportation. Its crane mounting plate 11 is compatible with various crane models, and the stable structure of the connecting column 12 and the crossbeam 13 can withstand the pressure, temperature and other working loads during the lifting of the pump cover 15, avoiding structural deformation or breakage during the lifting process and ensuring operational safety. This assembly provides a stable installation and load-bearing foundation for subsequent innovative functions, enabling precise linkage of functions such as center of gravity adjustment, clamping and locking, and spacing adjustment, solving the cumbersome problem of independent operation of each function in existing technologies. Compared with traditional fixed lifting structures, it has greater versatility and can be adapted to pump covers 15 of different specifications and center of gravity positions, eliminating the need for frequent changes of lifting devices and significantly improving lifting efficiency. At the same time, the rigid connection design reduces swaying and offset during the lifting process, reduces the difficulty of installing and connecting the pump cover 15, and effectively ensures operational safety and reliability in scenarios such as pump cover 15 maintenance and installation in industrial production.

[0024] The center of gravity adjustment component 2 is symmetrically arranged in two sets. The center of gravity adjustment component 2 includes a counterweight block 25 that slides on the crossbeam 13. The counterweight block 25 is used to adjust the center of gravity of the whole. The center of gravity adjustment assembly 2 includes an adjustment groove 21 formed in the crossbeam 13. An adjustment motor 22 is fixedly connected in the adjustment groove 21. An adjustment screw 23 is fixedly connected to the output end of the adjustment motor 22. A sliding seat 24 is threadedly connected to the side wall of the adjustment screw 23. The counterweight block 25 is fixedly connected to the top of the sliding seat 24.

[0025] Specifically, the center of gravity adjustment component 2 is symmetrically installed in the adjustment groove 21 of the crossbeam 13. During operation, after the adjustment motor 22 starts, it drives the adjustment screw 23 at the output end to rotate. Utilizing the threaded engagement between the screw and the sliding seat 24, the rotational motion of the motor is converted into the linear motion of the sliding seat 24. The counterweight 25 fixed to the top of the sliding seat 24 slides smoothly along the adjustment groove 21 with the sliding seat 24. By precisely changing the lateral position of the counterweight 25 on the crossbeam 13, the overall center of gravity distribution of the assembly of the device and the pump cover 15 is adjusted. In the physical environment, this component, through mechanical transmission and force balance adjustment, counteracts the torque difference caused by the center of gravity offset of the pump cover 15 itself, ensuring that the center of gravity of the assembly coincides with the vertical direction of the crane's traction force during lifting, thus fundamentally preventing the pump cover 15 from tilting or swaying due to uneven weight distribution on both sides.

[0026] Compared to the traditional method of manually replacing the counterweight 25, this system achieves automated adjustment via motor drive and screw transmission, offering convenient operation and higher adjustment precision. This effectively improves the efficiency of pump cover 15 installation and docking, reducing manual labor intensity and safety hazards. The two symmetrically arranged components can be adjusted synchronously or independently, adapting to pump covers 15 of different specifications and center of gravity positions, offering high versatility and eliminating the need for frequent changes in lifting equipment. In the physical scenario of lifting and transportation, precise center of gravity control reduces inertial swaying during lifting, preventing collisions and damage between the pump cover 15 and other components, and ensuring the sealing performance and structural integrity of the pump cover 15. Simultaneously, this component, in conjunction with the reinforcing component 4 and the sliding component 5, triggers subsequent locking and spacing adjustment actions by pressing the sliding seat 24 against the drive plate 48. This simplifies the operation process, improves the continuity and stability of lifting operations, further enhances safety during lifting and transportation, and meets the high-precision and high-safety lifting requirements of industrial production.

[0027] The bottom of the crossbeam 13 is equipped with a clamping assembly 3 for hoisting. The clamping assembly 3 includes a clamping block 31 disposed at the bottom of the crossbeam 13. A rotating ring 35 is rotatably connected inside the clamping block 31. The bottom of the rotating ring 35 is fixedly connected to the rigid hook 14.

[0028] The clamping block 31 has a clamping groove 32, and a fixed shaft 33 is fixedly connected in the clamping groove 32. A rotating ring 35 is rotatably connected to the side wall of the fixed shaft 33, and the rotating ring 35 and the fixed shaft 33 are connected by a torsion spring 34.

[0029] Specifically, the clamping assembly 3 is the core connecting structure for hoisting the pump cover 15. The foundation achieves initial alignment of the clamping block 31 by sliding the T-shaped sliding plate 52 at the bottom of the crossbeam 13 with the T-shaped sliding groove 51. After the rigid hook 14 is engaged with the lifting lug 16 of the pump cover 15, the rotating ring 35 inside the clamping block 31 rotates around the fixed shaft 33, and the torsion spring 34 stores force to generate pre-tightening force to complete the initial positioning. When the center of gravity is adjusted after lifting, the sliding seat 24 slides and squeezes the drive slide plate 48. The hydraulic oil in the drive groove 47 enters the hydraulic groove 41 through the first hydraulic channel 46, pushing the hydraulic plate 42 and the connecting plate 43 to move the toothed plate 44, which meshes with the toothed ring 45 on the side wall of the rotating ring 35 to achieve locking. At the same time, the hydraulic oil enters the piston groove 53 through the second hydraulic channel 55, pushing the piston plate 54 to move the T-shaped slide plate 52, adjusting the spacing of the clamping block 31 to match the position of the lifting lug 16. The control component 6, through the inner and outer T-shaped hollow cylinders 61 and the spring structure, ensures the stability and reset of the hydraulic drive, further enhancing the locking effect of the hook.

[0030] The clamping assembly 3 breaks through the limitations of traditional fixed hooks, combining basic connection, linkage locking, and spacing adjustment functions. Its dual locking structure, with pre-tensioned torsion spring 34 and meshing toothed plate 44 and toothed ring 45, significantly improves the stability of the connection between the hook and lifting lug 16, preventing center of gravity shift caused by relative rotation during lifting and reducing the risk of tilting and falling. Through a hydraulic linkage design, center of gravity adjustment, clamping locking, and spacing adjustment are performed simultaneously without additional operation, solving the problem of cumbersome operation in existing technologies. The T-shaped slide 51 and piston-driven spacing adjustment method can flexibly adapt to the positions of lifting lugs 16 of different specifications of pump covers 15, offering strong versatility. The spring and hollow cylinder structure of the control assembly 6 ensures stable hydraulic system pressure and precise component reset, maintaining clamping reliability even under varying pressure and load conditions during pump cover 15 lifting. This improves installation and docking efficiency while enhancing operational safety, providing stable assurance for pump cover 15 maintenance, transportation, and other scenarios.

[0031] The clamping block 31 is provided with a reinforcing component 4. The reinforcing component 4 includes a hydraulic groove 41 opened in the clamping block 31. A hydraulic plate 42 is slidably connected in the hydraulic groove 41. A toothed plate 44 is connected to one side of the hydraulic plate 42 through a connecting plate 43. A toothed ring 45 is engaged with the toothed plate 44. The toothed ring 45 is fixedly connected to the side wall of the rotating ring 35.

[0032] A drive groove 47 is provided in the crossbeam 13, and a drive slide plate 48 is slidably connected in the drive groove 47. The drive groove 47 and the drive slide plate 48 are connected by a return spring 49. The drive groove 47 and the hydraulic groove 41 are connected by a first hydraulic channel 46. The top inclined surface of the drive slide plate 48 abuts against the sliding seat 24.

[0033] Specifically, the reinforcing component 4 achieves its locking function through hydraulic transmission and gear meshing. After the rigid hook 14 is attached to the pump cover 15 via the lifting lug 16, the rotating ring 35 is initially limited under the action of the torsion spring 34. When the adjusting motor 22 drives the adjusting screw 23 to rotate, and the sliding seat 24 drives the counterweight 25 to slide along the adjusting groove 21 of the crossbeam 13 to adjust the center of gravity, the sliding seat 24 will squeeze the driving slide plate 48, causing the hydraulic oil in the driving groove 47 to flow into the hydraulic groove 41 of the clamping block 31 through the first hydraulic channel 46. The hydraulic oil pushes the hydraulic plate 42 to slide along the hydraulic groove 41, and drives the toothed plate 44 to move synchronously through the connecting plate 43. The toothed plate 44 precisely meshes with the toothed ring 45 fixed on the side wall of the rotating ring 35, forming a mechanical locking structure, restricting the rotation of the rotating ring 35, thereby fixing the rigid hook 14 and preventing the hook from rotating relative to the pump cover 15 during the lifting process.

[0034] Existing lifting hooks lack an adaptive locking mechanism, making them prone to uneven rotation and increased center of gravity shift during lifting. This new component, however, links center of gravity adjustment with locking, eliminating the need for additional drive components. Locking is triggered simply by moving the sliding seat 24, simplifying operation and improving responsiveness. Compared to simple elastic limiting, the gear-engaged locking method offers higher connection strength, resisting swaying during lifting and the load of the working conditions, eliminating the risk of hook loosening, and ensuring operational safety. It adapts to different center of gravity adjustment ranges, and regardless of the sliding distance of the counterweight 25, reliable locking can be achieved through hydraulic transmission. Combined with the reset function of the torsion spring 34, locking can be quickly released after lifting, improving operational efficiency. This design maintains structural simplicity while addressing the lack of stability in existing lifting hooks. It is compatible with various sizes of pump covers 15, significantly improving versatility and practicality.

[0035] A sliding component 5 is provided inside the crossbeam 13. The sliding component 5 is used to control the sliding of the clamping block 31. The sliding component 5 includes a T-shaped groove 51 opened at the bottom of the crossbeam 13. A T-shaped sliding plate 52 is slidably connected in the T-shaped groove 51. The clamping block 31 is fixedly connected to the bottom of the T-shaped sliding plate 52.

[0036] A piston plate 54 is fixedly connected to the side wall of the T-shaped slide plate 52. The piston plate 54 is slidably connected in the piston groove 53. The piston groove 53 is opened in the crossbeam 13. The piston groove 53 is connected to the drive groove 47 through the second hydraulic channel 55.

[0037] Specifically, the sliding component 5 is the core structure for achieving adaptive adjustment of the clamping distance, forming a closed-loop linkage with the center of gravity adjustment component 2 and the hydraulic drive system. In the physical environment, when the adjusting motor 22 drives the adjusting screw 23 to move the sliding seat 24 to adjust the center of gravity, the sliding seat 24 presses the drive slide plate 48, pressurizing the hydraulic oil in the drive groove 47, which is then injected into the piston groove 53 through the second hydraulic channel 55. The hydraulic oil pushes the piston plate 54 to slide along the piston groove 53, thereby driving the T-shaped slide plate 52 to move smoothly within the T-shaped groove 51 at the bottom of the crossbeam 13. The bottom of the T-shaped slide plate 52 is fixedly connected to the clamping block 31, ultimately achieving synchronous distance adjustment of the clamping block 31.

[0038] The innovative design of the sliding component 5 completely solves the pain points of fixed clamping spacing and poor versatility in existing technologies. Compared with traditional manual adjustment or fixed spacing designs, it achieves simultaneous spacing adjustment and center of gravity adjustment through a hydraulic linkage mechanism, eliminating the need for additional operation steps and significantly improving work efficiency. The cooperative structure of the T-shaped slide groove 51 and the T-shaped sliding plate 52 ensures that the clamping block 31 slides without offset or jamming, guaranteeing precise docking between the rigid hook 14 and the pump cover 15 lifting lug 16, and avoiding uneven force due to spacing deviation during lifting. The sealed sliding design of the piston plate 54 and the piston groove 53 improves the stability and load-bearing capacity of the hydraulic drive, adapting to pump covers 15 with different weights and different lifting lug 16 spacings, significantly enhancing the versatility of the device. In addition, this component works synergistically with the reinforcing component 4 to indirectly strengthen the hook locking effect while adjusting the spacing, solving the problem of disconnection between center of gravity adjustment and spacing adjustment and clamping fixation in existing technologies, making the lifting process safer and more stable, and effectively reducing safety hazards such as tilting and swaying.

[0039] A control component 6 is provided inside the second hydraulic channel 55. The control component 6 includes an outer T-shaped hollow cylinder 61 fixedly connected to the inner wall of the second hydraulic channel 55, an inner T-shaped hollow cylinder 62 inserted into the outer T-shaped hollow cylinder 61, a sealing plate 63 provided on one side of the inner T-shaped hollow cylinder 62, the outer T-shaped hollow cylinder 61 and the inner T-shaped hollow cylinder 62 being connected by a first spring 64, and the inner T-shaped hollow cylinder 62 and the sealing plate 63 being connected by a second spring 65.

[0040] The control component 6 precisely controls the flow rate and pressure of hydraulic oil through the outer T-shaped hollow cylinder 61, the inner T-shaped hollow cylinder 62 and the double spring structure, ensuring a smooth sliding process. At the same time, after the operation is completed, the spring return force pushes each component back to its initial position to prepare for the next operation.

[0041] Specifically, the control component 6 is installed in the second hydraulic channel 55. The outer T-shaped hollow cylinder 61 is fixed to the inner wall of the channel, and the inner T-shaped hollow cylinder 62 is inserted into it. It is connected to the outer T-shaped hollow cylinder 61 and the sealing plate 63 through the first spring 64 and the second spring 65, respectively, forming a two-way elastic control structure. During the lifting operation, the sliding seat 24 squeezes the drive slide plate 48, which pressurizes the hydraulic oil in the drive groove 47. Due to the damping characteristics of the control component 6, the hydraulic oil flows first through the first hydraulic channel 46 to the hydraulic groove 41. At this time, in the second hydraulic channel 55, the inner T-shaped hollow cylinder 62 keeps the channel closed under the action of the spring preload and the initial pressure of the hydraulic oil. When the hook is locked in the first hydraulic channel 46 (the hydraulic oil can no longer flow), the hydraulic pressure in the drive groove 47 increases, which overcomes the elastic force of the double springs and pushes the inner T-shaped hollow cylinder 62 to move, opening the second hydraulic channel 55. The hydraulic oil flows into the piston groove 53 to achieve the spacing adjustment. After the operation is completed, the reset spring 49 drives the drive slide plate 48 to return to its original position, the hydraulic oil flows back, and the double spring force pushes the inner T-shaped hollow cylinder 62 to reset, closing the second hydraulic channel 55 and restoring the initial state.

[0042] This component represents a core technological innovation of the device. Compared to existing technologies lacking sequential control of hydraulic channels, its combination of double springs and a T-shaped hollow cylinder design achieves precise timing control of hydraulic channels 55 (number 1 and 2), ensuring the hook locks before adjusting the spacing, avoiding instability caused by conflicting linkage actions. Structurally, it solves the problem of asynchronous center of gravity adjustment and clamping fixation in existing technologies. The double-spring structure adaptively adjusts the channel opening and closing based on hydraulic pressure, ensuring smooth hydraulic oil flow under high pressure and rapid channel sealing during low-pressure backflow, improving the stability and reliability of hydraulic drive and reset. Its bidirectional valve characteristic allows for bidirectional hydraulic oil flow, meeting the needs of both lifting and reset operations without the need for additional control components, simplifying the structure and reducing the risk of failure. Compared to traditional manual control of multiple channels, this component achieves automated sequential control of the hydraulic channels, improving the linkage accuracy of center of gravity adjustment, clamping and locking, and spacing adjustment, reducing tilting and swaying during pump cover 15 lifting, ensuring operational safety, and adapting to lifting pump covers 15 of different specifications, significantly improving the device's versatility and operational efficiency.

[0043] The working principle of this invention is as follows: During the lifting operation, the center of gravity adjustment and clamping fixation are precisely linked, preventing the pump cover 15 from tilting at the source and enhancing connection stability. After starting the adjustment motor 22, its output drives the adjustment screw 23 to rotate. Utilizing the threaded engagement between the screw and the sliding seat 24, the rotational motion is converted into linear motion of the sliding seat 24, causing the top-fixed counterweight block 25 to slide smoothly along the adjustment groove 21 in the crossbeam 13. By adjusting the two symmetrically arranged center of gravity adjustment components 2 synchronously or independently, the lateral position of the counterweight block 25 on the crossbeam 13 can be precisely changed, calibrating the overall center of gravity of the device and pump cover 15 assembly in real time. This ensures that the center of gravity coincides with the vertical direction of the crane's traction force, completely solving the lifting tilting problem caused by uneven weight distribution on both sides. During this process, the rigid hook 14 first hooks the pump cover 15 through the lifting lug 16. The rotating ring 35 in the clamping block 31 is initially limited under the elastic preload of the torsion spring 34, laying the foundation for subsequent locking actions. As the center of gravity is adjusted, the sliding seat 24 moves, and its bottom inclined surface presses against the drive slide plate 48 in the drive groove 47, causing the hydraulic oil in the drive groove 47 to be pressurized. The hydraulic oil then flows quickly into the hydraulic groove 41 of the clamping block 31 through the first hydraulic channel 46, pushing the hydraulic plate 42 to slide along the groove. Through the connecting plate 43, the toothed plate 44 is moved synchronously, and finally it precisely meshes with the toothed ring 45 on the side wall of the rotating ring 35 to form a mechanical locking structure, which completely restricts the relative rotation of the rotating ring 35 and the rigid hook 14, and achieves a stable locking of the hook.

[0044] While clamping and fixing are performed synchronously, the spacing adjustment function is adaptively activated, working in conjunction with control component 6 to ensure the orderly and reliable operation. After the pressurized hydraulic oil in drive groove 47 pushes the first hydraulic channel 46 to move, due to the timing control characteristics of control component 6, once the hydraulic oil in the first hydraulic channel 46 reaches static equilibrium (i.e., the hook is locked), the hydraulic pressure continues to rise and overcomes the preload of the double springs in control component 6, pushing the inner T-shaped hollow cylinder 62 to move and opening the second hydraulic channel 55. Hydraulic oil is injected into the piston groove 53 in the crossbeam 13 through the second hydraulic channel 55, pushing the piston plate 54 to slide along the groove, causing the T-shaped sliding plate 52 fixed thereto to move smoothly in the T-shaped sliding groove 51, thereby pulling the clamping block 31 at the bottom to adjust the spacing synchronously, precisely adapting to the position of the lifting lug 16 of the pump cover 15 of different specifications. Control component 6, through the coordinated action of the outer T-shaped hollow cylinder 61, the inner T-shaped hollow cylinder 62, and springs 64 and 65, ensures the sequential operation of hydraulic channel 46 (running first, followed by hydraulic channel 55) and, through the bidirectional valve design, enables bidirectional flow of hydraulic oil, ensuring drive stability during hoisting operations and component reset after completion. Simultaneously, the thrust generated by the continuous sliding of sliding seat 24 further drives clamping block 31 slightly away from lifting lug 16, strengthening the meshing tightness between toothed plate 44 and toothed ring 45 through the reverse force, achieving secondary locking of the hook and comprehensively ensuring structural stability during the hoisting process. The above embodiments are merely illustrative of the technical solutions of the present invention and not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions will not cause the essence of the corresponding technical solutions to depart from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pump cover lifting center of gravity adjustable device, characterized in that, The system includes a hoisting assembly (1), which includes a crane mounting plate (11). A connecting column (12) is installed at the bottom of the crane mounting plate (11). A crossbeam (13) is installed at the bottom of the connecting column (12). A center of gravity adjustment assembly (2) is installed inside the crossbeam (13). A rigid hook (14) is installed at the bottom of the crossbeam (13). The rigid hook (14) suspends a pump cover (15) via a lifting lug (16). The center of gravity adjustment component (2) is symmetrically arranged in two sets. The center of gravity adjustment component (2) includes a counterweight (25) that slides on the crossbeam (13). The counterweight (25) is used to adjust the center of gravity of the whole. The bottom of the crossbeam (13) is equipped with a clamping assembly (3) for hoisting. The clamping assembly (3) includes a clamping block (31) disposed at the bottom of the crossbeam (13). A rotating ring (35) is rotatably connected inside the clamping block (31). The bottom of the rotating ring (35) is fixedly connected to the rigid hook (14).

2. The adjustable center of gravity device for lifting a pump cover according to claim 1, characterized in that, The center of gravity adjustment assembly (2) includes an adjustment groove (21) opened in the crossbeam (13), an adjustment motor (22) is fixedly connected in the adjustment groove (21), an adjustment screw (23) is fixedly connected to the output end of the adjustment motor (22), a sliding seat (24) is threadedly connected to the side wall of the adjustment screw (23), and the counterweight block (25) is fixedly connected to the top of the sliding seat (24).

3. The adjustable center of gravity device for lifting a pump cover according to claim 2, characterized in that, The clamping block (31) has a clamping groove (32) inside, and a fixed shaft (33) is fixedly connected inside the clamping groove (32). A rotating ring (35) is rotatably connected to the side wall of the fixed shaft (33), and the rotating ring (35) and the fixed shaft (33) are connected by a torsion spring (34).

4. The adjustable center of gravity device for lifting a pump cover according to claim 3, characterized in that, The clamping block (31) is provided with a reinforcing component (4), which includes a hydraulic groove (41) opened in the clamping block (31). A hydraulic plate (42) is slidably connected in the hydraulic groove (41). A toothed plate (44) is connected to one side of the hydraulic plate (42) through a connecting plate (43). A toothed ring (45) is meshed with the toothed plate (44). The toothed ring (45) is fixedly connected to the side wall of the rotating ring (35).

5. The adjustable center of gravity device for lifting a pump cover according to claim 4, characterized in that, The crossbeam (13) has a drive groove (47) inside, and a drive slide plate (48) is slidably connected inside the drive groove (47). The drive groove (47) and the drive slide plate (48) are connected by a return spring (49). The drive groove (47) and the hydraulic groove (41) are connected by a first hydraulic channel (46). The top slope of the drive slide plate (48) abuts against the sliding seat (24).

6. The adjustable center of gravity device for lifting a pump cover according to claim 5, characterized in that, A sliding component (5) is provided inside the crossbeam (13). The sliding component (5) is used to control the sliding of the clamping block (31). The sliding component (5) includes a T-shaped groove (51) opened at the bottom of the crossbeam (13). A T-shaped sliding plate (52) is slidably connected inside the T-shaped groove (51). The clamping block (31) is fixedly connected to the bottom of the T-shaped sliding plate (52).

7. The adjustable center of gravity device for lifting a pump cover according to claim 6, characterized in that, The side wall of the T-shaped slide plate (52) is fixedly connected to a piston plate (54), which is slidably connected in a piston groove (53). The piston groove (53) is opened in the crossbeam (13), and the piston groove (53) is connected to the drive groove (47) through the second hydraulic channel (55).

8. The adjustable center of gravity device for lifting a pump cover according to claim 7, characterized in that, A control component (6) is provided in the second hydraulic channel (55). The control component (6) includes an outer T-shaped hollow cylinder (61) fixedly connected to the inner wall of the second hydraulic channel (55). An inner T-shaped hollow cylinder (62) is inserted into the outer T-shaped hollow cylinder (61). A sealing plate (63) is provided on one side of the inner T-shaped hollow cylinder (62). The outer T-shaped hollow cylinder (61) and the inner T-shaped hollow cylinder (62) are connected by a first spring (64). The inner T-shaped hollow cylinder (62) and the sealing plate (63) are connected by a second spring (65).

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