Counterweight device for large freight elevator

Abstract

The counterweight device comprises two side beams which are symmetrically arranged in parallel, the two ends of each side beam are connected with an upper clamping plate and a lower clamping plate respectively to form a counterweight block installation space with the periphery closed, counterweight blocks are stacked in the counterweight block installation space in the extension direction of the side beams, and the counterweight blocks are arranged in the counterweight block installation space in the extension direction of the side beams. The side beams are arranged on the upper clamping plate, the counterweight blocks are arranged on the side beams in parallel, moving strips allowing the counterweight blocks to move are arranged on the side beams in parallel, limiting grooves matched with the counterweight blocks are formed in the moving strips, and a rope wheel is installed at the position, located in the center of the counterweight block installation space, of the upper clamping plate. The application range of the counterweight guide rail distance is enlarged, the counterweight blocks can be controlled in the same direction through the one-way wheels, the structural layout is compact and reasonable, the occupied space is small, the gaps between the counterweight blocks and the side beams are shortened through the arranged moving strips, and the service life of the counterweight blocks is prolonged. Therefore, abrasion caused by mutual collision between the counterweight filler and the side beam in the operation process is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator components, in particular to a counterweight device for a large-scale freight elevator. Background Art

[0002] The counterweight device is mainly composed of a counterweight frame, a counterweight block, a guide shoe, a buffer device, etc. In actual applications, they have completely different structural designs according to different technical requirements, resulting in large differences in performance. For example, the patent announcement number CN201592940U discloses an elevator counterweight frame that can be installed with double rows of counterweight blocks, and the patent announcement number CN206266038U designs a double-row counterweight device for elevators. These traditional products only increase the storage space in a row of counterweight frames. If this design idea is followed, as the design load of the elevator increases, the counterweight frame will continue to grow in length, and the corresponding stiffness and strength will also be weakened.

[0003] In addition, the counterweight devices currently equipped for freight elevators are mostly single-layer counterweight placement spaces. Under heavy load conditions, the number of counterweights needs to be increased accordingly according to the balance coefficient (0.4-0.5) to achieve the effect of balancing the mass of the system. If you encounter a freight elevator above 20T, in a limited single-layer space, it is very likely to use non-standard cast iron counterweights, or at least a mixture of the two, to meet the balance conditions on both sides of the system. However, the cost of using non-standard cast iron counterweights is definitely much higher than that of traditional cement counterweights, and as the number of counterweights increases, if you want to limit the size of the counterweight device in the height direction, you will inevitably increase the size in the width and depth directions. This makes it difficult to avoid the counterweight frame structure being too wide and long, which in turn leads to a decrease in the overall rigidity of the counterweight frame.

[0004] For this purpose, the existing patent CN111689354A discloses a counterweight device for a super-large load freight elevator under high traction ratio conditions. It adopts a design of a single-piece counterweight frame, and arranges the rope wheels in a row at the top of the single-piece counterweight frame. The bottom of the rope wheels is used as a counterweight storage space. In addition, the single-piece counterweight frame is divided into several rows of counterweight installation spaces along its width direction, and two groups of counterweight installation spaces are formed along the depth direction of the single-piece counterweight frame. Counterweights are stacked in the counterweight storage space, and double-track guides are respectively set on both sides of the width of the single-piece counterweight frame. The "double-row" counterweight arrangement of the single-piece counterweight frame greatly reduces the size requirements of the counterweight in the width and depth directions, and improves the rigidity capacity; it can use cheap counterweight materials; the four-track design solves the displacement delay problem generated at both ends of the length direction when the counterweight device is started under high traction ratio conditions.

[0005] However, by adopting the above technical solution, the applicant found that the following technical problems still exist: although the operation scheme satisfies the precise control of the counterweight, the installation occupies a large space and is not easy to operate. Utility Model Content

[0006] In view of the deficiencies in the above-mentioned prior art, the purpose of the present utility model is to provide a counterweight device for a large freight elevator.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a counterweight device for a large freight elevator, comprising: two side beams arranged in parallel and symmetrically, the two ends of the side beams are respectively connected to an upper clamping plate and a lower clamping plate to form a counterweight installation space which is closed on all sides, counterweights are stacked in the counterweight installation space along the extension direction of the side beams, and moving bars for moving the counterweights are arranged in parallel on the side beams, the moving bars have limiting grooves cooperating with the counterweights, and a pulley is installed on the upper clamping plate and at the center of the counterweight installation space.

[0008] Furthermore, the upper clamping plate is composed of two parallel channel steels, and the top of the side beam is installed between the two channel steels.

[0009] As a preferred solution of the present application, placement openings are provided at intervals on any one of the side beams, and guide shoes are detachably mounted at the placement openings on the side beams.

[0010] Furthermore, a groove connected to the limiting groove is provided on the guide shoe.

[0011] Furthermore, positioning holes are provided at both ends of the counterweight block, and the latches provided on the end surfaces of the side beams can pass through the side beams and extend into the positioning holes to fix the counterweight block on the side beams.

[0012] As a preferred solution of the present application, gaps are left between adjacent moving bars.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] While improving the utilization rate of the shaft, the present application designs a double-row counterweight arrangement to expand the applicable range of the counterweight guide gauge, and adopts a one-way wheel to achieve the same-direction control of the counterweight block. The structural layout is compact and reasonable, and the space occupied is small. The movable bar is provided to shorten the gap between the counterweight block and the side beam, thereby further reducing the wear caused by the collision between the counterweight block and the side beam during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0016] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the main structure of the counterweight block in the utility model;

[0018] Figure 3 This is a schematic diagram of the installation structure of the upper clamping plate and the side beam in the utility model;

[0019] Figure 4 This is a schematic diagram of the installation position of the placement port in the utility model;

[0020] Figure 5 This is a schematic diagram of the main structure of the guide shoe of the utility model;

[0021] Figure 6 It is a schematic diagram of the opening position of the positioning opening on the counterweight block in the utility model.

[0022] In the figure: 1. side beam; 11. placement opening; 2. upper clamping plate; 21. channel steel; 3. rope pulley; 4. moving bar; 41. limit groove; 5. guide shoe; 51. groove; 6. lower clamping plate; 7. counterweight block; 71. positioning opening; 8. latch. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figure 1-6 As shown, the present application provides a counterweight device for a large freight elevator, comprising: two parallel and symmetrically arranged side beams 1, the two ends of the side beams 1 are respectively connected to an upper clamping plate 2 and a lower clamping plate 6 to form a counterweight block 7 installation space closed on all sides, counterweight blocks 7 are stacked in the counterweight installation space along the extension direction of the side beams 1, and moving bars 4 for guiding the counterweight blocks 7 to make vertical reciprocating movements are arranged in parallel on the side beams 1, and the moving bars 4 are provided with limiting grooves 41 cooperating with the counterweight blocks 7 to surround the counterweight blocks 7 on three sides, and a sheave 3 is installed on the upper clamping plate 2 and at the center of the counterweight block 7 installation space. The stacking structure adopted in the present application can ensure the state requirement of the car balance, and it can realize the synchronous lifting and lowering of the double-layer counterweight blocks 7 by providing a single sheave 3, which is conducive to the neat winding and operation force of the wire rope and reduces the load requirement of the wire rope. It has a stable structure, strong load capacity, good balance performance, and can be widely used in large-tonnage elevators.

[0025] In order to ensure the stability of the counterweight frame in bearing the counterweight block 7, the upper clamping plate 2 is composed of two parallel channel steels 21, and the top of the side beam 1 is installed between the two channel steels 21 to achieve a stable balanced state of the counterweight frame.

[0026] Since the existing elevator shaft is relatively small in depth, it is difficult to place the counterweight 7. For this reason, in the present application, a placement opening 11 is provided at intervals on any one of the side beams 1. The guide shoe 5 is detachably installed at the placement opening 11 on the side beam 1 through a provided bolt, and there is no movable bar 4 at the placement opening 11 (in actual operation, the movable bar 4 is preferably a sliding static rail). The present application adopts the above-mentioned side opening method, which has a simple structure, so as to effectively solve the placement method of the counterweight 7 and has the advantage of being easy to install.

[0027] In order to ensure that the counterweight block 7 can always perform effective lifting and lowering movements on the side beam 1 and prevent the counterweight block 7 from falling off, a groove 51 connected to the limit groove 41 is opened on the guide shoe 5. The guide shoe 5 of the present application is fixed to the side beam 1 by bolts, and in actual operation, a buffer pad can be attached to the inner side wall where the guide shoe 5 contacts the side beam 1, and the groove 51 in the guide shoe 5 is actually composed of a gap punched between two steel plates that are integrally formed with the guide shoe 5 and horizontally arranged.

[0028] Both ends of the counterweight block 7 are provided with positioning holes 71, and the pin 8 provided on the end surface of the side beam 1 can pass through the side beam 1 and extend into the positioning hole 71. In actual operation, this design is mainly for positioning the counterweight block 7. When any counterweight block 7 needs to be repaired, the counterweight blocks 7 adjacent to the upper and lower ends of the counterweight block 7 to be repaired can be fixed by the pin 8, and then the guide shoe 5 can be removed to remove the counterweight block 7 from the measuring beam to realize the disassembly of the counterweight block 7. Then, after the replacement counterweight block 7 is replaced, the guide shoe 5 can be reinstalled, and the pin 8 can be removed from the positioning hole 71.

[0029] In order to ensure that the counterweights 7 operate independently of each other, gaps are left between adjacent moving bars 4 .

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A counterweight device for a large freight elevator, characterized in that: include: Two side beams (1) are arranged in parallel and symmetrically, and the two ends of the side beams (1) are respectively connected to an upper clamping plate (2) and a lower clamping plate (6) to form a counterweight (7) installation space which is closed on all sides. Counterweights (7) are stacked in the counterweight installation space along the extension direction of the side beams (1), and moving bars (4) for moving the counterweights (7) are arranged in parallel on the side beams (1), and the moving bars (4) have limiting grooves (41) cooperating with the counterweights (7). A rope pulley (3) is installed on the upper clamping plate (2) and at the center of the counterweight (7) installation space.

2. A counterweight device for a large freight elevator as claimed in claim 1, characterized in that: The upper clamping plate (2) is composed of two parallel channel steels (21), and the top of the side beam (1) is installed between the two channel steels (21).

3. A counterweight device for a large freight elevator as claimed in claim 2, characterized in that: A placement opening (11) is provided at intervals on any one of the side beams (1), and a guide shoe (5) is detachably mounted on the placement opening (11) on the side beam (1).

4. A counterweight device for a large freight elevator as claimed in claim 3, characterized in that: The guide shoe (5) is provided with a groove (51) which is connected to the limiting groove (41).

5. A counterweight device for a large freight elevator as claimed in claim 4, characterized in that: Positioning openings (71) are provided at both ends of the counterweight (7), and a latch (8) provided on the end surface of the side beam (1) can pass through the side beam (1) and extend into the positioning opening (71) to fix the counterweight (7) on the side beam (1).

6. A counterweight device for a large freight elevator as claimed in claim 1, characterized in that: There are gaps between adjacent moving bars (4).

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