Hoistway lift with high safety

Abstract

The application provides a hoistway lifting device with high safety, comprising: a pair of guide rails arranged on the two side walls of the hoistway; a car matched with the pair of guide rails; a pair of counterweight rails arranged on the back wall of the hoistway; a counterweight mechanism matched with the pair of counterweight rails, comprising a counterweight frame with a top beam, a bottom beam, a limiting beam between the top beam and the bottom beam, and a pair of C-shaped side beams connected with the two ends of the top beam, the bottom beam and the limiting beam, and a counterweight space enclosed by the limiting beam, the bottom beam and the pair of C-shaped side beams; a plurality of counterweight blocks arranged in the counterweight space, and each counterweight block is provided with a sliding nut; and a screw rod matched with the sliding nut, capable of penetrating through the plurality of counterweight blocks and being connected with the bottom beam. The application not only realizes the modular stacking of the counterweight blocks, but also prevents the counterweight blocks from loosening under vibration to the greatest extent through the thread self-locking characteristics between the screw rod and the sliding nut, which is beneficial to the long-term stable operation of the equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lifting equipment, in particular to a high-safety shaft lifting equipment. BACKGROUND

[0002] In the field of modern architecture, shaft lifting equipment is widely used for the vertical transportation of personnel and goods, and its safety and stability are crucial, and the counterweight mechanism plays a key role in the operation of the entire shaft lifting equipment.

[0003] Among them, the existing counterweight mechanism generally relies on screws, bolts and other threaded fasteners to fix and stack the counterweight blocks. This method is relatively convenient when the equipment is initially installed, but in the actual operation process, the shaft lifting equipment will inevitably produce shaking or vibration during operation. After long-term use, the screws will loosen. On the one hand, this will cause the counterweight mechanism and the guide rail to not cooperate firmly enough, affecting the balance stability of the lifting equipment, causing abnormal vibration and noise during equipment operation, thereby reducing the service life and operation accuracy of the equipment, and even in extreme cases, it may cause safety accidents. On the other hand, after the screws loosen, the counterweight blocks are prone to displacement, changing the original counterweight balance, affecting the running balance of the car, and in severe cases, it may cause the car to tilt, endangering the transportation safety of personnel and goods.

[0004] In addition, this traditional fixing method also has the problem of inconvenient adjustment. When the counterweight needs to be adjusted according to different load requirements, the operation is cumbersome, and the adjusted counterweight blocks are not fixed firmly enough, making it difficult to ensure the safe operation of the equipment under various working conditions, increasing the maintenance cost and maintenance workload of the equipment.

[0005] Therefore, the existing technology needs to be further improved and improved. SUMMARY

[0006] In view of the problem that the threaded connecting piece will loosen during long-term operation when the counterweight mechanism in the prior art connects and fixes multiple counterweight blocks, the present application provides a high-safety shaft lifting equipment to improve the stability of the counterweight mechanism during long-term operation.

[0007] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0008] The present application provides a high-safety shaft lifting equipment, comprising:

[0009] A pair of guide rails are arranged on the two side walls of the shaft respectively;

[0010] A car cooperates with the pair of guide rails;

[0011] A pair of counterweight rails are arranged on the rear wall of the shaft respectively;

[0012] The counterweight mechanism matched with the pair of counterweight rails comprises:

[0013] The counterweight frame has a top beam, a bottom beam, a limiting beam between the top beam and the bottom beam, and a pair of C-shaped side beams connected to both ends of the top beam, the bottom beam and the limiting beam respectively, and a counterweight space is enclosed between the limiting beam, the bottom beam and the pair of C-shaped side beams;

[0014] A plurality of counterweight blocks are arranged in the counterweight space, and any counterweight block is provided with a sliding nut;

[0015] The screw rod matched with the sliding nut can pass through the plurality of counterweight blocks and be connected to the bottom beam.

[0016] Further, a filling cavity formed around the sliding nut is arranged in any counterweight block, and the filling cavity is used to accommodate the liquid alloy.

[0017] Further, a limiting groove is arranged in the area close to the filling cavity at the bottom of any counterweight block, and the top of another counterweight block adjacent to any counterweight block is provided with a limiting protrusion matched with the limiting groove.

[0018] Further, the counterweight mechanism further comprises a heating element arranged in the filling cavity and electrically connected between the sliding nut, and a heating circuit can be formed between the heating element, the sliding nut, the screw rod and the external power source through the cooperation between the screw rod and the sliding nut.

[0019] Further, the limiting protrusion is made of a memory alloy, and the limiting protrusion can be deformed in the limiting groove in response to the heat transferred to the liquid alloy by the heating element.

[0020] Further, the bottom beam is provided with a bearing matched with the bottom end of the screw rod, and the limiting beam is provided with a sealing cover matched with the top end of the screw rod.

[0021] Further, the top end of the screw rod is provided with a hexagonal joint.

[0022] Further, magnetic particles are mixed in the liquid alloy, and permanent magnets are arranged in the areas close to the filling cavities of the abutting surfaces of the two adjacent counterweight blocks, and the permanent magnets can be magnetically attracted to the magnetic particles in the liquid alloy.

[0023] Further, the two ends of the counterweight block outwardly extend a clamping part, and the clamping part can be matched with the C-shaped groove formed by the C-shaped side beam.

[0024] Further, the counterweight mechanism further comprises a counterweight block arranged on the top beam.

[0025] Due to the adoption of the above technical scheme, the technical effects of the present application are as follows:

[0026] The application provides a high-safety shaft lifting device, which comprises a guide rail, a car, a counterweight rail and a counterweight mechanism. Specifically, the counterweight mechanism comprises a counterweight frame, a screw rod and a plurality of counterweight blocks. On the one hand, the counterweight space formed by the top beam, the bottom beam, the limiting beam and the C-shaped side beam of the counterweight frame can realize the modular stacking of the counterweight blocks, so that the user can flexibly increase or decrease the number of counterweight blocks according to the change of the load of the car, and the device is convenient for debugging. On the other hand, the sliding nut arranged in the counterweight block can be matched with the screw rod. This connection mode replaces the traditional screw fixing mode, and through the thread self-locking characteristics between the screw rod and the sliding nut, the loosening of the counterweight block under vibration is prevented to the greatest extent, thereby greatly reducing the maintenance cost and frequency of the device, and facilitating the long-term stable operation of the device. In addition, the C-shaped side beam of the counterweight frame wraps the two sides of the counterweight block, so as to limit the lateral displacement of the counterweight block, and the rigid frame formed between the C-shaped beam, the limiting beam, the top beam and the bottom beam also helps to enhance the overall impact resistance of the counterweight mechanism.

[0027] The above description is only a summary of the technical scheme of the embodiments of the application. In order to more clearly understand the technical means of the embodiments of the application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the embodiments of the application more obvious and easy to understand, the specific embodiments of the application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme of the embodiments of the application or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below. Obviously, for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0029] Figure 1 A structural schematic view of a high-safety shaft lifting device provided by the application;

[0030] Figure 2 A structural schematic view of a counterweight mechanism provided by the application;

[0031] Figure 3 A structural schematic view of a counterweight frame provided by the application;

[0032] Figure 4 A structural schematic view of another counterweight mechanism provided by the application;

[0033] Figure 5 A structural schematic view of a counterweight block provided by the application;

[0034] Figure 6 A top view of a counterweight block provided by the application;

[0035] Figure 7 A sectional view of a C-C cross section in the present application Figure 6 A sectional view of a C-C cross section in the present application

[0036] Figure 8 Another structure diagram of a counterweight provided by the present application

[0037] Figure 9 A sectional view of a C-C cross section in the present application Figure 4 An enlarged diagram of part A in the present application

[0038] Figure 10 A sectional view of a C-C cross section in the present application Figure 4 An enlarged diagram of part B in the present application

[0039] Explanation of main reference signs:

[0040] 100 guide rail

[0041] 200 car

[0042] 300 counterweight rail

[0043] 400 counterweight mechanism, 410 counterweight frame, 411 top beam, 412 bottom beam, 413 limiting beam, 414 C-shaped side beam, 415 bearing, 416 sealing cover, 420 counterweight, 421 sliding nut, 422 filling cavity, 423 limiting groove, 424 limiting protrusion, 425 clamping part, 430 screw rod, 431 hexagonal joint, 440 reverse rope wheel assembly DETAILED DESCRIPTION

[0044] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should fall within the scope of protection of the present application.

[0045] Referring to Figures 1-5 Fig. 1, the present application provides a high-safety shaft lifting device, which comprises a pair of guide rails 100, a car 200, a pair of counterweight rails 300 and a counterweight mechanism 400. The pair of guide rails 100 are respectively arranged on the two side walls of the shaft, the car 200 is matched with the pair of guide rails 100, the pair of counterweight rails 300 are respectively arranged on the rear wall of the shaft, and the counterweight mechanism 400 is matched with the pair of counterweight rails 300.

[0046] The counterweight mechanism 400 includes a counterweight frame 410, a plurality of counterweight blocks 420, and a screw rod 430. The counterweight frame 410 has a top beam 411, a bottom beam 412, a limiting beam 413 between the top beam 411 and the bottom beam 412, and a pair of C-shaped side beams 414 connected to both ends of the top beam 411, the bottom beam 412, and the limiting beam 413, respectively, and a counterweight space (not labeled in the figure) is enclosed between the limiting beam 413, the bottom beam 412, and the pair of C-shaped side beams 414; the plurality of counterweight blocks 420 are all arranged in the counterweight space, and any counterweight block 420 is provided with a sliding nut 421; the screw rod 430 is matched with the sliding nut 421, and the screw rod 430 can pass through the plurality of counterweight blocks 420 and be connected to the bottom beam 412.

[0047] The counterweight frame 410 is the basic support structure of the counterweight mechanism 400, including the top beam 411, the bottom beam 412, the limiting beam 413, and the pair of C-shaped side beams 414. The top beam 411 and the bottom beam 412 are respectively located at the upper and lower ends of the counterweight frame 410, and the limiting beam 413 is located between the top beam 411 and the bottom beam 412 and maintains a certain distance from both. The pair of C-shaped side beams 414 are respectively connected to both ends of the top beam 411, the bottom beam 412, and the limiting beam 413, forming a stable frame structure. The limiting beam 413, the bottom beam 412, and the pair of C-shaped side beams 414 enclose a closed counterweight space, in which the plurality of counterweight blocks 420 can be installed.

[0048] Furthermore, a through hole is formed in each counterweight block 420, and a sliding nut 421 is embedded in the through hole. The sliding nuts 421 are matched with the screw rod 430. The screw rod 430 can pass through the plurality of counterweight blocks 420 and be connected to the bottom beam 412. By rotating the screw rod 430, the position of the counterweight block 420 on the screw rod 430 can be adjusted, thereby achieving flexible adjustment of the counterweight block 420 to meet the demand for counterweight under different loads. When it is necessary to increase the counterweight, more counterweight blocks 420 can be sleeved on the screw rod 430 and tightened; when it is necessary to reduce the counterweight, the screw rod 430 can be loosened, and the corresponding number of counterweight blocks 420 can be removed.

[0049] It should be noted that the number of sliding nuts 421 and screw rods 430 is not limited in this application. In one embodiment, the number of sliding nuts 421 in any counterweight block 420 can be three, and the three sliding nuts 421 are uniformly spaced along the length direction of the counterweight block 420. Correspondingly, the number of screw rods 430 can also be three. In this way, the cooperation of multiple screw rods 430 and multiple sliding nuts 421 can further improve the connection effect between the plurality of counterweight blocks 420 and enhance the stability of the counterweight mechanism 400 during operation.

[0050] Furthermore, this application allows for various implementations of the drive mechanism for the screw 430. For example, users can use tools such as electric sockets or electric wrenches to drive the screw 430, or they can directly configure a motor drive structure, gear drive mechanism, or belt drive structure within the counterweight mechanism 400. Given the diverse drive mechanisms for the screw 430, users can flexibly select the appropriate drive structure during actual operation, and this application will not elaborate further on this aspect.

[0051] The high-safety hoisting equipment provided by this invention, on the one hand, utilizes the counterweight space formed by the top beam 411, bottom beam 412, limiting beam 413, and C-shaped side beam 414 of the counterweight frame 410 to achieve modular stacking of counterweight blocks 420. This allows users to flexibly increase or decrease the number of counterweight blocks 420 according to changes in the load on the car 200, facilitating equipment debugging. On the other hand, the sliding nut 421 provided in the counterweight block 420 can cooperate with the screw 430. This connection method replaces the traditional screw fixing method, and the self-locking characteristic of the thread between the screw 430 and the sliding nut 421 maximizes the prevention of the counterweight block 420 from loosening under vibration, thereby greatly reducing the equipment's maintenance costs and frequency, and promoting long-term stable operation of the equipment. In addition, the C-shaped side beams 414 in the counterweight frame 410 wrap around both sides of the counterweight block 420, thereby limiting the lateral displacement of the counterweight block 420. Furthermore, the rigid frame formed between the C-shaped beams, the limiting beams 413, the top beams 411 and the bottom beams 412 also helps to enhance the overall impact resistance of the counterweight mechanism 400.

[0052] In some embodiments, refer to Figure 6 and Figure 7 As shown, each counterweight 420 has a filling cavity 422 formed around the sliding nut 421, and the filling cavity 422 is used to contain liquid alloy (not shown in the figure). It should be noted that the liquid alloy mentioned in this application refers to an alloy that is solid at room temperature (e.g., 15-30℃) and liquid at high temperature (e.g., 50-2000℃). Because this type of alloy can change its state with temperature, it has significant advantages in terms of filling and weight reduction of the counterweight 420.

[0053] Specifically, the counterweight 420 is typically quite heavy. During elevator installation or maintenance, disassembling and reassembling the counterweight 420 often requires significant effort and workload from technicians. This invention addresses this by creating a filling cavity 422 within the counterweight 420 and injecting liquid alloy into the filling cavity 422 after the counterweight 420 is installed on the counterweight frame 410. This reduces the operational difficulty for technicians to some extent. Furthermore, when adjusting the counterweight weight of the counterweight 420, technicians can directly increase or decrease the weight of the counterweight 420 by injecting or removing liquid alloy from the filling cavity 422, greatly reducing the maintenance difficulty of the counterweight mechanism 400 and improving maintenance efficiency.

[0054] Preferably, the liquid alloy can be Wood's alloy, Field alloy, tin-bismuth eutectic alloy, etc., and this application does not limit the specific type of liquid alloy. When the liquid alloy is a tin-bismuth eutectic alloy, its melting point is 138℃, thus avoiding accidental melting caused by room temperature or high ambient temperatures (such as in summer), and allowing for rapid liquid transformation through controlled heating. Furthermore, tin-bismuth alloys do not contain toxic elements such as lead and cadmium, meeting relevant environmental standards and suitable for long-term enclosed use inside equipment, avoiding the risk of leakage and pollution. In addition, tin-bismuth alloys are not easily oxidized or corroded in either the solid or liquid states, reducing erosion of the internal structure of the counterweight 420 and extending its service life.

[0055] It is understood that this application does not limit the specific number of filling cavities 422 in the counterweight block 420. For example, when there are multiple sliding nuts 421, there can also be multiple filling cavities 422, and the multiple filling cavities 422 correspond to the multiple sliding nuts 421 respectively.

[0056] In this embodiment, the filling cavity 422 and liquid alloy in the counterweight 420, due to the good fluidity of the liquid alloy, can make the weight distribution of the counterweight 420 more uniform, thereby improving the balance performance of the counterweight mechanism 400, enhancing the balance effect on the car 200, and making the car 200 more stable during operation.

[0057] In some embodiments, refer to Figure 5 and Figure 8 As shown, a limiting groove 423 is provided at the bottom of any counterweight 420 near the filling cavity 422, and a limiting protrusion 424 adapted to the limiting groove 423 is provided on the top of another counterweight 420 adjacent to any counterweight 420.

[0058] The limiting groove 423 at the bottom of the counterweight 420 and the limiting protrusion 424 at the top of the adjacent counterweight 420 are matched with each other, which can effectively prevent the relative displacement or sliding of the counterweight 420 during operation, ensure the stability and integrity of the counterweight 420, and avoid problems such as counterweight imbalance and unstable equipment operation caused by the displacement of the counterweight 420. In addition, the engagement structure of the limiting protrusion 424 and the limiting groove 423 increases the connection strength and overall structural strength between the counterweights 420 to some extent, so that the counterweight mechanism 400 can better withstand various forces during operation, thereby improving the safety and reliability of the equipment. In addition, this limiting structure can also guide the vertical alignment of each counterweight 420 during equipment assembly, reduce the installation error of the counterweight mechanism 400, and avoid uneven force on the screw rod 430 caused by partial load.

[0059] It should be noted that the specific structure of the limiting protrusion 424 and the limiting groove 423 in the present application can have many different embodiments, for example, the cross section of the limiting protrusion 424 can be rectangular, inverted trapezoidal or trapezoidal; accordingly, the structure of the limiting groove 423 can be a rectangular groove, a trapezoidal groove, etc., which are not limited in the present application. In addition, the present application does not limit the number of limiting protrusions 424 and limiting grooves 423. In a specific example, there are six limiting protrusions 424 on the top of any counterweight 420, and three of them are located on one side of the counterweight 420, and the other three are located on the other side of the counterweight 420.

[0060] In some embodiments, the counterweight mechanism 400 further comprises a heating element (not shown in the figure) located in the filling cavity 422 and electrically connected between the sliding nut 421, and a heating circuit can be formed between the heating element, the sliding nut 421, the screw rod 430 and the external power source through the cooperation between the sliding nut 421 and the screw rod 430. The heating element can be a heating wire, a heating resistor, etc.

[0061] When the sliding nut 421 cooperates with the screw rod 430, the electrical connection between the sliding nut 421 and the screw rod 430, and between the heating element and the sliding nut 421 can be achieved by the contact between the sliding nut 421 and the screw rod 430, or by the conductive structure such as the wire or conductive sheet arranged inside the sliding nut 421 and the screw rod 430. At this time, if the screw rod 430 is externally connected to the external power source, a heating circuit can be formed between the heating element, the sliding nut 421, the screw rod 430 and the external power source, thereby achieving the heating of the liquid alloy in the filling cavity 422.

[0062] In the embodiment, when the counterweight 420 is disassembled, the technician can connect the screw 430 to the external power supply to make the heating element work and heat the liquid alloy. When the liquid alloy is heated to a certain temperature, it changes from solid state at room temperature to molten state or liquid state. At this time, the technician can discharge the liquid alloy from the through hole (not shown in the figure) on the surface of the counterweight 420 to fill the cavity 422. Through the above operation, the overall weight of the counterweight 420 is reduced to some extent, so that the technician can disassemble the counterweight 420 without liquid alloy, and the maintenance difficulty of the technician is reduced.

[0063] In some embodiments, continuing to refer to Figures 5-8 As shown, the limiting protrusion 424 is made of a memory alloy, and can be deformed in the limiting groove 423 in response to the heat transferred to the liquid alloy by the heating element. The memory alloy refers to a special metal material that can restore the original macroscopic shape at another temperature range after plastic deformation at a certain temperature range.

[0064] For example, the memory alloy in the present application can be a nickel-titanium-based memory alloy (such as Ni-Ti-Cu alloy), an iron-based memory alloy (such as Fe-Mn-Si alloy, Fe-Ni-Co-Ti alloy), a copper-based memory alloy (such as Cu-Al-Ni alloy), etc. When the memory alloy is a Ni-Ti-Cu alloy, the limiting protrusion 424 made of the memory alloy is in a contraction state at high temperature (austenite phase) and returns to the pre-deformation state at low temperature (martensite phase). At this time, when the heating circuit in the counterweight mechanism 400 works, the liquid alloy in the filling cavity 422 can be heated, and the liquid alloy can also transfer heat to the limiting protrusion 424 around the filling cavity 422, so that the memory alloy can contract at high temperature, the limiting protrusion 424 and the limiting groove 423 are separated, and the quick disassembly between the adjacent counterweights 420 is realized.

[0065] Further, in order to ensure that the limiting protrusion 424 has better temperature response characteristics, considering the possible loss of heat during the heat transfer from the liquid alloy to the limiting protrusion 424, the present application can reasonably configure the melting point of the liquid alloy and the phase transition temperature of the memory alloy, such as configuring the phase transition temperature of the memory alloy to be 10-50℃ lower than the melting point of the liquid alloy, so as to minimize the influence of heat dissipation on the deformation of the limiting protrusion 424 during heat transfer, thereby facilitating the technician to quickly maintain the counterweight mechanism 400 and improving the maintenance efficiency of the equipment.

[0066] In some embodiments, referring to Figure 4 , Figure 9 and Figure 10As shown, the bottom beam 412 is provided with a bearing 415 matched with the bottom end of the screw rod 430, and the limiting beam 413 is provided with a sealing cover 416 matched with the top end of the screw rod 430.

[0067] The bearing 415 can reduce the friction between the screw rod 430 and the bottom beam 412, make the rotation of the screw rod 430 more flexible, and prolong the service life of the screw rod 430; the sealing cover 416 can prevent impurities from entering the connection between the screw rod 430 and the limiting beam 413, avoid the rust or foreign matter blocking of the screw rod 430, keep the connection part clean and lubricated, reduce the wear, and improve the operation efficiency and reliability of the equipment. In addition, the design of the sealing cover 416 can also effectively improve the sealing performance of the counterweight mechanism 400, prevent the leakage of liquid alloy and the like, protect the environment and the safety of the equipment, and also avoid the impurities such as dust and moisture from the outside entering the inside of the counterweight mechanism 400, affecting the normal operation thereof.

[0068] In some embodiments, continuing to refer to Figure 9 As shown, the top end of the screw rod 430 is provided with a hexagonal joint 431. Through the provision of the hexagonal joint 431, it is convenient for technicians to use wrenches and the like to install and disassemble, which improves the maintenance and adjustment efficiency of the counterweight mechanism 400, and reduces the maintenance cost and time.

[0069] In some embodiments, the liquid alloy is mixed with magnetic particles, and the abutting surfaces of the two adjacent counterweight blocks 420 near the filling cavity 422 are provided with permanent magnets (not shown in the figure), and the permanent magnets can be magnetically attracted to the magnetic particles in the liquid alloy.

[0070] The magnetic attraction between the permanent magnets and the magnetic particles in the liquid alloy can attract the counterweight blocks 420 to each other, enhance the integrity and stability of the counterweight blocks 420, prevent the counterweight blocks 420 from loosening and shifting during operation, and improve the stability and reliability of the counterweight mechanism 400. Moreover, the magnetic attraction can also increase the connection strength between the counterweight blocks 420 and the counterweight frame 410 to a certain extent, prevent the counterweight blocks 420 from being separated from the counterweight frame 410 due to inertia and the like during operation, and improve the safety of the equipment.

[0071] It should be noted that most liquid alloys usually do not have strong magnetism, so the magnetic particles with magnetism are mixed in the liquid alloy to make the liquid alloy as a whole have strong magnetism and realize the magnetic attraction with the permanent magnets. Moreover, by adjusting the content of the magnetic particles in the liquid alloy, the magnetic force between the permanent magnets and the liquid alloy can be adjusted.

[0072] In some embodiments, referring to Figure 5 , Figure 6 and Figure 8As shown, the two ends of the counterweight 420 extend outwardly with engaging portions 425 which can be matched with the C-shaped groove formed by the C-shaped side beam 414. This structure facilitates the quick installation and positioning of the counterweight 420, ensures the accurate position of the counterweight 420 in the counterweight frame 410, and the matching of the engaging portions 425 with the C-shaped groove can also limit the counterweight 420 to a certain extent, preventing the counterweight 420 from shaking and deviating during operation, and improving the stability and reliability of the counterweight mechanism 400

[0073] In some embodiments, reference is made to Figures 2-4 As shown, the counterweight mechanism 400 further comprises a reverse pulley assembly 440 arranged on the top beam 411.

[0074] The reverse pulley assembly 440 can change the direction of the traction rope, make the connection of the traction rope between the counterweight frame 410 and the car 200 more reasonable, optimize the traction effect, and improve the running stability and balance of the car 200. Moreover, the arrangement of the reverse pulley assembly 440 can also make the traction rope more stable during operation, reduce the wear and tear and the risk of loosening of the traction rope, and improve the safety performance of the equipment.

[0075] Although the present application has been described in detail through reference to preferred embodiments, it should be understood that the present application is not limited to those preferred embodiments. Without departing from the spirit and scope of the present application, those skilled in the art can make various equivalent modifications or replacements to the embodiments of the present application, and these modifications or replacements should be within the scope of the present application. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or replacements, which should be covered within the protection scope of the present application.

Claims

1. A high-safety hoistway lift apparatus characterized by comprising: The utility model relates to a kind of elevator, including: A pair of guide rails are arranged on the two side walls of the hoistway respectively; The car cooperates with the pair of guide rails; A pair of counterweight rails are arranged on the rear wall of the hoistway respectively; The counterweight mechanism cooperates with the pair of counterweight rails, including: The counterweight frame has a top beam, a bottom beam, a limiting beam between the top beam and the bottom beam, and a pair of C-shaped side beams connected to the two ends of the top beam, the bottom beam and the limiting beam respectively, and a counterweight space is enclosed between the limiting beam, the bottom beam and the pair of C-shaped side beams; A plurality of counterweight blocks are arranged in the counterweight space, and each counterweight block is provided with a sliding nut, and each counterweight block has a filling cavity formed around the sliding nut inside, which is used to accommodate a liquid alloy, and a limiting groove is formed in the area near the filling cavity at the bottom of each counterweight block, and the top of another counterweight block adjacent to each counterweight block is provided with a limiting protrusion matched with the limiting groove; The screw rod matched with the sliding nut can pass through the plurality of counterweight blocks and be connected to the bottom beam; The heating element in the filling cavity is electrically connected between the sliding nut, and a heating circuit can be formed between the heating element, the sliding nut, the screw rod and an external power source through the cooperation between the screw rod and the sliding nut. The limiting protrusion is made of memory alloy and exhibits a contracted state at high temperature and returns to a pre-deformed state at low temperature to deform in the limiting groove in response to the heat transferred to the liquid alloy by the heating element.

2. The high-safety shaft elevator according to claim 1, wherein The bottom beam is provided with a bearing matched with the bottom end of the screw rod, and the limiting beam is provided with a sealing cover matched with the top end of the screw rod.

3. The hoistway lift device with high safety according to claim 2, characterized by, The top end of the screw rod is provided with a hexagonal joint.

4. The hoistway lift device with high safety according to claim 1, characterized by, The liquid alloy contains magnetic particles, and the abutting surface of the two adjacent counterweight blocks near the filling cavity is provided with a permanent magnet, and the permanent magnet can be magnetically attracted to the magnetic particles in the liquid alloy.

5. The hoistway lift apparatus according to claim 1, wherein The two ends of the counterweight block extend outwardly with a clamping portion, and the clamping portion can cooperate with the C-shaped groove formed by the C-shaped side beam.

6. The hoistway lift device with high safety according to claim 1, characterized by, The counterweight mechanism further includes a reverse pulley assembly arranged on the top beam.

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