Hoistway lifting equipment with high safety

Abstract

The invention provides a high-safety hoistway lifting device which comprises a pair of guide rails arranged on the two side walls of a hoistway respectively. The lift car is matched with the pair of guide rails; the counter weight rails are respectively arranged on the rear wall of the hoistway; the balance weight mechanism is matched with the pair of balance weight rails and comprises a balance weight frame, the balance weight frame is provided with a top beam, a bottom beam, a limiting beam located 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 two ends of the bottom beam and the two ends of the limiting beam respectively, and a balance weight space is defined by the limiting beam, the bottom beam and the pair of C-shaped side beams; the balancing weights are arranged in the balancing weight space, and any balancing weight is provided with a sliding nut; and the screw rod matched with the sliding nut can respectively penetrate through the balancing weights and is connected with the bottom beam. Modular stacking of the balancing weights can be achieved, the balancing weights are prevented from loosening under vibration to the maximum extent through the thread self-locking characteristic between the screw and the sliding nut, and long-term stable operation of equipment is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting equipment, and particularly relates to a shaft lifting equipment with high safety. Background Art

[0002] In the field of modern architecture, shaft lifting equipment is widely used for the vertical transportation of personnel and goods. 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 mechanisms generally rely on threaded fasteners such as screws and bolts to fix and stack counterweight blocks. This method is relatively convenient during the initial installation of the equipment. However, during the actual operation, due to the inevitable shaking or vibration of the shaft lifting equipment during operation, after long-term use, the screws will become loose. On the one hand, this will cause the cooperation between the counterweight mechanism and the guide rail to be unreliable, affecting the balance and stability of the lifting equipment, resulting in abnormal vibration and noise during the operation of the equipment, thereby reducing the service life and operation accuracy of the equipment, and even potentially causing safety accidents in extreme cases. On the other hand, after the screws become loose, the counterweight blocks are prone to displacement, changing the original counterweight balance, affecting the running balance of the car, and may even cause the car to tilt severely, endangering the transportation safety of personnel and goods.

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

[0005] Therefore, the existing technology needs to be further improved and enhanced. Summary of the Invention

[0006] Aiming at the problem that when the counterweight mechanism in the prior art uses threaded connectors to connect and fix multiple counterweight blocks, the threaded connectors will become loose during long-term operation, the present invention provides a shaft lifting equipment with high safety to improve the stability of the counterweight mechanism during long-term operation.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] The present invention provides a shaft lifting equipment with high safety, including:

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

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

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

[0012] A counterweight mechanism cooperating with a pair of counterweight rails, comprising:

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

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

[0015] A screw rod adapted to the sliding nut, which can respectively pass through a number of counterweight blocks and be connected to the bottom beam.

[0016] Furthermore, a filling cavity formed around the sliding nut is opened inside any counterweight block, and the filling cavity is used to accommodate liquid alloy.

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

[0018] Furthermore, the counterweight mechanism further includes a heating element located in the filling cavity and electrically connected to the sliding nut, and through the cooperation between the screw rod and the sliding nut, a heating circuit can be formed among the heating element, the sliding nut, the screw rod and an external power supply.

[0019] Furthermore, the limiting protrusion is made of shape memory alloy, and in response to the heat transferred from the heating element to the liquid alloy, the limiting protrusion can deform in the limiting groove.

[0020] Furthermore, the bottom beam is provided with a bearing cooperating with the bottom end of the screw rod, and the limiting beam is provided with a sealing cover adapted to the top end of the screw rod.

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

[0022] Furthermore, magnetic particles are mixed in the liquid alloy, permanent magnets are provided in the areas of the adjacent surfaces of two adjacent counterweight blocks close to the filling cavity, and the permanent magnets can magnetically cooperate with the magnetic particles in the liquid alloy.

[0023] Furthermore, engaging portions extend outward from both ends of the counterweight block, and the engaging portions can cooperate with the C-shaped grooves formed by the C-shaped side beams.

[0024] Furthermore, the counterweight mechanism further includes a rope sheave assembly provided on the top beam.

[0025] Due to the adoption of the above technical solutions, the technical effects achieved by the present invention are:

[0026] The hoistway lifting equipment with high safety provided by the present invention includes a guide rail, a car, a counterweight rail and a counterweight mechanism. Specifically, the counterweight mechanism includes a counterweight frame, a screw rod and a number of counterweight blocks. On the one hand, the counterweight space formed by the top beam, bottom beam, limit beam and C-shaped side beam of the counterweight frame can realize the modular stacking of the counterweight blocks, so that it is convenient for users to flexibly increase or decrease the number of counterweight blocks according to the change of the car load, which is convenient for the debugging of the equipment. On the other hand, the sliding nut arranged in the counterweight block can cooperate with the screw rod. This connection method replaces the traditional screw fixing method, and through the thread self-locking characteristic between the screw rod and the sliding nut, it can prevent the counterweight block from loosening under vibration to the greatest extent, thereby greatly reducing the maintenance cost and maintenance frequency of the equipment and facilitating the long-term stable operation of the equipment. In addition, the C-shaped side beam in the counterweight frame wraps both sides of the counterweight block, so that the lateral displacement of the counterweight block can be restricted, and the rigid frame formed by the C-shaped beam, limit beam, top beam and bottom beam is also beneficial to enhancing the overall impact resistance of the counterweight mechanism.

[0027] The above description is only an overview of the technical solution of the embodiment of the present invention. In order to be able to understand the technical means of the embodiment of the present invention more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the embodiment of the present invention more obvious and understandable, the following specifically gives the specific implementation manners of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0029] Figure 1 It is a schematic structural diagram of a hoistway lifting equipment with high safety provided by the present invention;

[0030] Figure 2 It is a schematic structural diagram of a counterweight mechanism provided by the present invention;

[0031] Figure 3 It is a schematic structural diagram of a counterweight frame provided by the present invention;

[0032] Figure 4 It is a schematic structural diagram of another counterweight mechanism provided by the present invention;

[0033] Figure 5 It is a schematic structural diagram of a counterweight block provided by the present invention;

[0034] Figure 6 It is a top view of a counterweight block provided by the present invention;

[0035] Figure 7 Provided by the present invention Figure 6 Cross-sectional view of the C-C section in

[0036] Figure 8 Schematic structural diagram of another counterweight provided by the present invention

[0037] Figure 9 Provided by the present invention Figure 4 Enlarged schematic view of part A in

[0038] Figure 10 Provided by the present invention Figure 4 Enlarged schematic view of part B in

[0039] Main reference numeral description:

[0040] 100 Guide rail

[0041] 200 Carriage

[0042] 300 Counterweight rail

[0043] 400 Counterweight mechanism, 410 Counterweight frame, 411 Top beam, 412 Bottom beam, 413 Limit beam, 414 C-shaped side beam, 415 Bearing, 416 Sealing cover, 420 Counterweight block, 421 Sliding nut, 422 Filling cavity, 423 Limit groove, 424 Limit protrusion, 425 Engaging portion, 430 Screw rod, 431 Hexagonal joint, 440 Deflection pulley assembly Detailed implementation manners

[0044] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] Refer to Figures 1 - 5 As shown, an embodiment of the present invention provides a shaft hoisting device with high safety, including a pair of guide rails 100, a carriage 200, a pair of counterweight rails 300 and a counterweight mechanism 400. The pair of guide rails 100 are respectively arranged on both side walls of the shaft, the carriage 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] Among them, the counterweight mechanism 400 includes a counterweight frame 410, a number 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 located between the top beam 411 and the bottom beam 412, and a pair of C-shaped side beams 414 respectively connected to the two ends of the top beam 411, the bottom beam 412, and the limiting beam 413. A counterweight space (not marked in the figure) is formed by enclosing between the limiting beam 413, the bottom beam 412, and the pair of C-shaped side beams 414; a number of counterweight blocks 420 are all arranged in the counterweight space, and any one of the counterweight blocks 420 is provided with a sliding nut 421; the screw rod 430 is adapted to the sliding nut 421, and the screw rod 430 can respectively pass through a number 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 a top beam 411, a bottom beam 412, a limiting beam 413, and a 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 of them. A pair of C-shaped side beams 414 are respectively connected to the two ends of the top beam 411, the bottom beam 412, and the limiting beam 413 to form a stable frame structure. A closed counterweight space is formed by enclosing between the limiting beam 413, the bottom beam 412, and the pair of C-shaped side beams 414, and a number of counterweight blocks 420 can be installed in this counterweight space.

[0048] Moreover, each counterweight block 420 is provided with a through hole, and a sliding nut 421 is embedded in the through hole. These sliding nuts 421 are adapted to the screw rod 430. The screw rod 430 can respectively pass through a number 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, so as to realize the flexible adjustment of the counterweight block 420 to meet the counterweight requirements 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 there is no limit to the configuration quantity of the sliding nut 421 and the screw rod 430 in this application. In one implementation manner, the sliding nut 421 in any one of the counterweight blocks 420 can be three, and the three sliding nuts 421 are evenly spaced along the length direction of the counterweight block 420. Correspondingly, the number of the screw rods 430 can also be three. This way of matching multiple screw rods 430 with multiple sliding nuts 421 can further improve the connection effect between multiple counterweight blocks 420 and enhance the stability during the operation of the counterweight mechanism 400.

[0050] In addition, regarding the driving method of the screw 430, there are various different implementation manners in the present application. For example, a user can drive the screw 430 by holding tools such as an electric socket, an electric wrench, etc., or directly configure relevant motor driving structures, gear driving structures, belt driving structures, etc. in the counterweight mechanism 400. In view of the diverse driving methods of the screw 430, during the actual operation process, the user can flexibly select according to the existing driving structures, and the present application will not elaborate on this too much.

[0051] The hoistway lifting equipment with high safety provided by the present invention, on the one hand, through the counterweight space formed by the top beam 411, bottom beam 412, limit beam 413 and C-shaped side beam 414 of the counterweight frame 410, modular stacking of the counterweight blocks 420 can be realized, so that it is convenient for the user to flexibly increase or decrease the number of counterweight blocks 420 according to the change of the load of the car 200, which is convenient for the debugging of the equipment. On the other hand, the sliding nut 421 arranged in the counterweight block 420 can cooperate with the screw 430. This connection method replaces the traditional screw fixing method, and through the thread self-locking characteristic between the screw 430 and the sliding nut 421, the loosening of the counterweight block 420 under vibration can be prevented to the greatest extent, thereby greatly reducing the maintenance cost and maintenance frequency of the equipment and being beneficial to the long-term stable operation of the equipment. In addition, the C-shaped side beam 414 in the counterweight frame 410 wraps both sides of the counterweight block 420, so that the lateral displacement of the counterweight block 420 can be restricted, and the rigid frame formed between the C-shaped beam, the limit beam 413, the top beam 411 and the bottom beam 412 is also beneficial to enhancing the overall impact resistance of the counterweight mechanism 400.

[0052] In some embodiments, referring to Figure 6 and Figure 7 as shown, a filling cavity 422 formed around the sliding nut 421 is provided inside any counterweight block 420, and the filling cavity 422 is used to accommodate a liquid alloy (not shown in the figure). It should be noted that the liquid alloy described in the present application refers to an alloy that can present a solid state at normal temperature (such as 15 - 30 °C, etc.) and a liquid state at high temperature (such as 50 - 2000 °C). Since this type of alloy can change its own state with the change of temperature, it has significant advantages in the filling and weight reduction of the counterweight block 420.

[0053] Specifically, the counterweight 420 usually has a relatively large self-weight. During the installation or maintenance of the elevator, if it is necessary to disassemble and assemble the counterweight 420, it often requires technicians to expend a great deal of energy and work intensity. The present invention reduces the operation difficulty of technicians to a certain extent by providing a filling cavity 422 in the counterweight 420 and injecting a liquid alloy into the filling cavity 422 after the counterweight 420 is installed on the counterweight frame 410. Moreover, when it is necessary to adjust the counterweight of the counterweight 420, technicians can also directly increase or decrease the weight of the counterweight 420 by injecting the liquid alloy into the filling cavity 422 or discharging the liquid alloy from the filling cavity 422, greatly reducing the maintenance difficulty of technicians for the counterweight mechanism 400 and improving the maintenance efficiency.

[0054] Preferably, the liquid alloy can be Wood's alloy, Field's alloy, tin-bismuth eutectic alloy, etc., and the present application does not limit the specific type of the liquid alloy. Among them, when the liquid alloy is tin-bismuth eutectic alloy, since its melting point is 138°C, it can avoid accidental melting caused by normal temperature or ambient high temperature (such as in summer), and can also quickly trigger the transformation to the liquid state through controllable heating. Moreover, the tin-bismuth alloy does not contain toxic elements such as lead and cadmium, meets relevant environmental protection standards, is suitable for long-term use enclosed inside the equipment, and avoids the risk of leakage and pollution. In addition, the tin-bismuth alloy is not easily oxidized or corroded in both the solid and liquid states, can reduce the erosion of the internal structure of the counterweight 420, and extend the service life of the counterweight 420.

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

[0056] In this embodiment, the arrangement of the filling cavity 422 and the 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 balancing effect on the car 200, and making the car 200 run more smoothly during operation.

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

[0058] The limiting groove 423 at the bottom of the counterweight block 420 and the limiting protrusion 424 at the top of the adjacent counterweight block 420 cooperate with each other to effectively prevent the counterweight block 420 from relative displacement or sliding during operation, ensuring the stability and integrity of the counterweight block 420, and avoiding problems such as counterweight imbalance and unstable equipment operation caused by the displacement of the counterweight block 420. In addition, the interlocking structure of the limiting protrusion 424 and the limiting groove 423 increases the connection strength and overall structural strength between the counterweight blocks 420 to a certain extent, so that the counterweight mechanism 400 can better withstand the 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 block 420 during equipment assembly, reduce the installation error of the counterweight mechanism 400, and avoid uneven force on the screw 430 due to eccentric loading.

[0059] It should be noted that the specific structure of the limiting protrusion 424 and the limiting groove 423 in this application can have many different implementations. For example, the cross-section of the limiting protrusion 424 can be rectangular, or it can be an inverted trapezoid or trapezoid; accordingly, the structure of the limiting groove 423 can be a rectangular groove, a trapezoidal groove, etc., and this application does not limit this. In addition, this application does not limit the number of configurations of the limiting protrusion 424 and the limiting groove 423. In a specific example, there can be six limiting protrusions 424 on the top of any counterweight block 420, and three of the limiting protrusions 424 are located on one side of the counterweight block 420, and the other three limiting protrusions 424 are located on the other side of the counterweight block 420.

[0060] In some embodiments, the counterweight mechanism 400 further includes a heater (not shown) located within the filling chamber 422 and electrically connected to the sliding nut 421. The screw 430 cooperates with the sliding nut 421 to form a heating circuit between the heater, the sliding nut 421, the screw 430, and an external power source. The heater may be a heating wire, a thermal resistor, or the like.

[0061] When the sliding nut 421 and the screw 430 are mated, electrical communication can be achieved between the sliding nut 421 and the screw 430, or between the heating element and the sliding nut 421, through contact between the sliding nut 421 and the screw 430, or through conductive structures such as wires or conductive sheets disposed within the sliding nut 421 and the screw 430, and between the heating element and the sliding nut 421. At this point, if the screw 430 is connected to an external power source, a heating circuit can be formed between the heating element, the sliding nut 421, the screw 430, and the external power source, thereby heating the liquid alloy in the filling cavity 422.

[0062] In specific implementation, when disassembling the counterweight 420, a technician can connect the screw 430 through an external power source carried, so that the heating element works and heats the liquid alloy. When heated to a specific temperature, the liquid alloy changes from normal temperature solid state 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) opened on the surface of the counterweight 420 into the filling cavity 422. Through the above operations, the overall weight of the counterweight 420 is reduced to a certain extent, facilitating the technician to disassemble the counterweight 420 without liquid alloy and reducing the maintenance and repair difficulty for the technician.

[0063] In some embodiments, with continued reference to Figures 5 - 8 as shown, the limiting protrusion 424 is made of shape memory alloy, and in response to the heat transferred by the heating element to the liquid alloy, the limiting protrusion 424 can deform in the limiting groove 423. Among them, the shape memory alloy refers to a special metal material that undergoes plastic deformation in a certain temperature range and can restore its original macroscopic shape in another temperature range.

[0064] Exemplarily, the shape memory alloy in the present application can be a nickel-titanium-based shape memory alloy (such as Ni-Ti-Cu alloy), an iron-based shape memory alloy (such as Fe-Mn-Si alloy, Fe-Ni-Co-Ti alloy), a copper-based shape memory alloy (such as Cu-Al-Ni alloy), etc. When the shape memory alloy is Ni-Ti-Cu alloy, the limiting protrusion 424 made of this shape memory alloy shows a contracted state at high temperature (austenite phase) and returns to the pre-deformed state at low temperature (martensite phase). At this time, when the heating circuit formed in the counterweight mechanism 400 works, it can heat the liquid alloy in the filling cavity 422, and the liquid alloy can also transfer the heat to the limiting protrusion 424 around the filling cavity 422, so that the shape memory alloy can contract at high temperature, and the limiting protrusion 424 is disengaged from the limiting groove 423, thus realizing the rapid disassembly between adjacent counterweights 420.

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

[0066] In some embodiments, with reference to Figure 4 、 Figure 9 and Figure 10As shown, the bottom beam 412 is provided with a bearing 415 that mates with the bottom end of the screw 430, and the limit beam 413 is provided with a sealing cover 416 that fits the top end of the screw 430.

[0067] The setting of the bearing 415 can reduce the friction between the screw 430 and the bottom beam 412, making the rotation of the screw 430 more flexible and extending the service life of the screw 430; the sealing cover 416 can prevent impurities from entering the connection between the screw 430 and the limit beam 413, avoid corrosion or foreign object jamming of the screw 430, keep the connection part clean and lubricated, reduce 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 leakage of liquid alloy, etc., protect the environment and the safety of the equipment, and at the same time avoid external dust, moisture and other impurities from entering the inside of the counterweight mechanism 400 and affecting its normal operation.

[0068] In some embodiments, continuing to refer to Figure 9 As shown, the top end of the screw 430 is provided with a hexagonal joint 431. Through the setting of the hexagonal joint 431, it is convenient for technicians to use tools such as wrenches for installation and disassembly, improving the maintenance and adjustment efficiency of the counterweight mechanism 400, and reducing the maintenance cost and time.

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

[0070] The magnetic attraction and cooperation between the permanent magnet and the magnetic particles in the liquid alloy can make the counterweight blocks 420 attract 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 and cooperation method 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 disengaging from the counterweight frame 410 due to inertia during operation, and improve the safety of the equipment.

[0071] It should be noted that since most liquid alloys usually do not have strong magnetism, in this application, magnetic particles with magnetism are mixed in the liquid alloy, so that the liquid alloy as a whole exhibits strong magnetism and realizes magnetic attraction and cooperation with the permanent magnet. And by adjusting the content of magnetic particles in the liquid alloy, the magnetic force between the permanent magnet and the liquid alloy can be adjusted.

[0072] In some embodiments, referring to Figure 5 、 Figure 6 and Figure 8As shown, engaging portions 425 extend outwardly from both ends of the counterweight 420, and the engaging portions 425 can cooperate 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, ensuring the accurate position of the counterweight 420 within the counterweight frame 410. At the same time, the cooperation between the engaging portions 425 and the C-shaped groove can also play a certain limiting role on the counterweight 420, preventing the counterweight 420 from shaking and shifting during operation, and improving the stability and reliability of the counterweight mechanism 400.

[0073] In some embodiments, referring to Figures 2 - 4 As shown, the counterweight mechanism 400 further includes a back rope pulley assembly 440 provided on the top beam 411.

[0074] The back rope pulley assembly 440 can change the running direction of the hoisting rope, making the connection between the counterweight frame 410 and the car 200 more reasonable, optimizing the hoisting effect, and improving the running stability and balance of the car 200. Moreover, the setting of the back rope pulley assembly 440 can also make the hoisting rope more stable during operation, reduce the risk of wear and loosening of the hoisting rope, and improve the safety performance of the equipment.

[0075] Although the present invention has been described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should all be within the scope of the present invention. / Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A hoistway lifting device with high safety, characterized in that, Comprising: A pair of guide rails, respectively arranged on two side walls of the hoistway; A car, cooperating with the pair of guide rails; A pair of counterweight rails, respectively arranged on the rear wall of the hoistway; A counterweight mechanism cooperating with the pair of counterweight rails, comprising: A counterweight frame, having a top beam, a bottom beam, a limiting beam located between the top beam and the bottom beam, and a pair of C-shaped side beams respectively connected to two ends of the top beam, the bottom beam and the limiting beam, and a counterweight space is enclosed among 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 any one of the counterweight blocks is provided with a sliding nut; A screw rod adapted to the sliding nut, capable of passing through a plurality of the counterweight blocks respectively and connecting to the bottom beam.

2. The hoistway lifting equipment with high safety according to claim 1, characterized in that, A filling cavity formed around the sliding nut is opened inside any one of the counterweight blocks, and the filling cavity is used for accommodating liquid alloy.

3. The well shaft lifting equipment with high safety according to claim 2, characterized in that, A limiting groove is opened in a region of any one of the counterweight blocks close to the filling cavity at the bottom, and a limiting protrusion adapted to the limiting groove is arranged at the top of another counterweight block adjacent to any one of the counterweight blocks.

4. The hoistway lifting equipment with high safety according to claim 3, characterized in that, The counterweight mechanism further includes a heating element located in the filling cavity and electrically connected to the sliding nut, and through the cooperation between the screw rod and the sliding nut, a heating circuit can be formed among the heating element, the sliding nut, the screw rod and an external power supply.

5. The hoistway lifting equipment with high safety according to claim 4, characterized in that, The limiting protrusion is made of shape memory alloy, and in response to the heat transferred by the heating element to the liquid alloy, the limiting protrusion can deform in the limiting groove.

6. The hoistway lifting equipment with high safety according to claim 1, characterized in that, The bottom beam is provided with a bearing cooperating with the bottom end of the screw rod, and the limiting beam is provided with a sealing cover adapted to the top end of the screw rod.

7. The hoistway lifting equipment with high safety according to claim 6, characterized in that, A hexagonal joint is arranged at the top end of the screw rod.

8. The hoistway lifting equipment with high safety according to claim 2, characterized in that, Magnetic particles are mixed in the liquid alloy, permanent magnets are arranged in regions of adjacent contact surfaces of two adjacent counterweight blocks close to the filling cavity, and the permanent magnets can be magnetically attracted and cooperated with the magnetic particles in the liquid alloy.

9. The hoistway lifting equipment with high safety according to claim 1, characterized in that, Clamping portions extend outwards at two ends of the counterweight block, and the clamping portions can cooperate with C-shaped grooves formed by the C-shaped side beams.

10. The hoistway lifting equipment with high safety according to claim 1, characterized in that, The counterweight mechanism further includes a deflector sheave assembly arranged on the top beam.

Images