Vibration damping support for coal preparation plant vibrating screen

Abstract

The utility model provides a coal preparation plant vibrating screen vibration reduction support, elasticity is connected in the lower part of coal preparation plant vibrating screen, including the frame that is spliced by a pair of longitudinal beam and a pair of crossbeam, a plurality of lower shock absorbing spring subassembly and a plurality of pairs of damper, a plurality of lower shock absorbing spring subassembly elasticity is connected in the bottom of longitudinal beam, lower shock absorbing spring subassembly includes support seat board and sets up a plurality of lower shock absorbing springs on support seat board, longitudinal beam with every support seat board is respectively hinged with a pair of damper. This coal preparation plant vibrating screen vibration reduction support can carry out integral shock absorption installation when carrying out secondary reconstruction to coal preparation plant vibrating screen, avoids large -scale adjustment equipment, pipeline and chute layout, can shorten the shutdown time of existing coal preparation plant vibrating screen secondary shock absorption reconstruction.

Description

Technical Field

[0001] This utility model relates to the field of vibrating screens in coal preparation plants, and more specifically, to a vibration damping support for a vibrating screen in a coal preparation plant. Background Technology

[0002] In coal preparation plants, vibrating screens are critical equipment, and their vibration issues are particularly prominent. Currently, vibration damping devices for vibrating screens are mainly installed as part of new plant construction. However, for existing coal preparation plants, the layout of equipment, pipelines, chutes, and production processes are relatively fixed, making it impossible to install and debug vibration damping devices using the same methods as for new plants. Furthermore, when retrofitting vibrating screens in coal preparation plants with secondary vibration damping, it is necessary to consider the existing installation layout and efficiency of the vibrating screens to minimize downtime.

[0003] Utility model patent CN221908355U discloses a vibration damping mechanism for a vibrating screen, including a horizontally arranged lower flange and an upper flange. The upper flange is located directly above the lower flange. A vertically arranged support cylinder is fixed to the top of the lower flange, and a support plate is fixed to the top of the support cylinder. The support plate has several vertically arranged sliding holes, which are evenly spaced around the center line of the support cylinder. A horizontally arranged support platform is slidably connected inside the support cylinder. A lower support column, corresponding to each sliding hole, is fixed to the top of the support platform. The upper end of the lower support column is fitted into the sliding hole. A lifting mechanism for driving the support platform to move up and down is provided in the support cylinder below the support platform. An upper support column, corresponding to each lower support column, is fixed to the bottom of the upper flange, and a spring is provided between the upper and lower support columns.

[0004] This vibration damping mechanism can solve the technical problem of inconvenient replacement of vibration damping springs in existing vibration screens. However, the disclosed structure of this vibration damping mechanism consists of multiple independent mechanisms, which is not convenient for secondary modification and overall vibration damping installation of the vibration screen in coal preparation plants, resulting in low efficiency. Utility Model Content

[0005] In order to achieve overall vibration damping installation during the secondary renovation of vibrating screens in coal preparation plants, avoid large-scale adjustments to equipment, pipelines and chute layouts, and shorten the downtime of secondary vibration damping renovation of existing vibrating screens in coal preparation plants, the technical solution adopted by this utility model is: a vibration damping support for vibrating screens in coal preparation plants, elastically connected to the bottom of the vibrating screen in coal preparation plants, including a frame spliced ​​by a pair of longitudinal beams and a pair of transverse beams, several lower vibration damping spring assemblies, and several pairs of dampers; Several of the lower damping spring assemblies are elastically connected to the bottom of the longitudinal beam. Each lower damping spring assembly includes a support plate and several lower damping springs disposed on the support plate. A pair of dampers are respectively hinged between the longitudinal beam and each of the support plates.

[0006] Beneficial effects: The lower damping spring assembly can provide elastic support for the frame, making its bottom suspended, so that it can adapt to the layout of equipment, pipelines and chutes in the existing factory. On the other hand, the frame can be used to bear the overall force, and the vibration generated by the vibrating screen can be transmitted to the lower damping spring assembly through the frame for overall damping, thereby improving the damping effect and the stability of the equipment during damping.

[0007] Based on the above, the upper part of the longitudinal beam is provided with several spring seat plate mounting slots, and the upper spring seat plate for mounting the upper shock-absorbing spring is provided in the spring seat plate mounting slot.

[0008] Beneficial effect: Since the lower damping spring is added, the length of the upper damping spring needs to be shortened as much as possible. Therefore, this requirement is met by setting a downwardly recessed spring seat plate mounting groove on the longitudinal beam.

[0009] Based on the above, the upper spring seat plate and the support seat plate are arranged correspondingly in the upper and lower positions.

[0010] The beneficial effect is that by setting the upper spring seat plate and the support seat plate in a corresponding manner, it can be ensured that the lower damping spring is located directly below the upper damping spring, thus providing better elastic support.

[0011] Based on the above, the support plate is provided with a plurality of spring limiting posts for installing the lower shock absorber spring.

[0012] Beneficial effects: By using spring limiting posts, the lower shock absorber spring can be installed stably, improving the shock absorption effect.

[0013] Based on the above, the upper end of the damper is hinged to the side wall of the longitudinal beam, and the lower end of the damper is hinged to the side wall of the support plate.

[0014] Based on the above, several of the lower damping spring assemblies are symmetrically arranged on a pair of longitudinal beams.

[0015] Based on the above, the number of lower damping springs is greater than the number of upper damping springs.

[0016] Based on the above, the pair of longitudinal beams and the pair of transverse beams are detachably connected.

[0017] The beneficial effect is that by detachably connecting the pair of longitudinal beams and the pair of transverse beams, it is possible to assemble the parts sequentially in an existing factory.

[0018] Based on the above, two pairs of lifting lugs are also provided on the longitudinal beam to facilitate on-site hoisting.

[0019] This utility model has substantial features and advancements compared to existing technologies. Specifically, the vibration damping support for a coal preparation plant vibrating screen provided by this utility model has the following advantages: 1. By setting several upper damping spring assemblies above the frame and several lower damping spring assemblies below the frame, on the one hand, the lower damping spring assemblies can be used to provide elastic support for the frame, making its bottom suspended and adaptable to the layout of equipment, pipes and chutes in the existing factory. On the other hand, the frame can be used to bear the overall force, and the vibration generated by the vibrating screen can be transmitted to the lower damping spring assemblies through the frame for overall damping, thereby improving the damping effect and the stability of the equipment during damping.

[0020] 2. By designing a frame composed of a pair of crossbeams and a pair of longitudinal beams, the size of the frame and the installation positions of the upper and lower damping spring assemblies can be flexibly adjusted according to the dimensions of the vibrating screen. This allows for targeted adjustments and modifications to adapt to different models of vibrating screens. Furthermore, during installation, the vibration damping device can be fine-tuned according to the actual site conditions to ensure optimal vibration damping performance, meeting the personalized needs of various existing coal preparation plants.

[0021] Testing showed that, in practical applications at existing coal preparation plants, adding vibration-damping supports to the vibrating screen reduced the screen's vibration acceleration by 46% to 50%, significantly decreasing the screen's vibration amplitude. By reducing the impact of vibration on the equipment, the lifespan of the equipment was effectively extended, operational stability was improved, and production efficiency was increased. Simultaneously, the risk of vibration damage to the plant structure was reduced, ensuring plant safety. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the side structure of the vibration damping support for the vibrating screen in a coal preparation plant provided by this utility model.

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the vibration damping support for the vibrating screen in a coal preparation plant provided by this utility model.

[0024] Figure 3 This is a schematic diagram of the top surface structure of the vibration damping support for a coal preparation plant provided by this utility model.

[0025] Figure 4 This utility model provides a schematic diagram of the vibration damping support for a coal preparation plant vibrating screen and the assembly structure of the coal preparation plant vibrating screen.

[0026] In the diagram: 1. Longitudinal beam; 2. Damper; 3. Upper spring seat plate; 4. Spring seat plate mounting groove; 5. Support seat plate; 6. Lower damping spring; 7. Lifting lug; 8. Spring limit post; 9. Crossbeam; 10. Coal preparation plant vibrating screen; 11. Upper damping spring. Detailed Implementation

[0027] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0028] Example 1 This embodiment provides a vibration damping support for a vibrating screen in a coal preparation plant, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the elastic connection below the vibrating screen 10 in the coal preparation plant includes a frame spliced ​​together by a pair of longitudinal beams 1 and a pair of transverse beams 9, four lower damping spring assemblies, and four pairs of dampers 2. Four lower damping spring assemblies are elastically connected to the bottom of the longitudinal beam 1. Each lower damping spring assembly includes a support plate 5 and a plurality of lower damping springs 6 disposed on the support plate 5. A pair of dampers 2 are hinged between the longitudinal beam 1 and each support plate 5.

[0029] Specifically, the upper part of the longitudinal beam 1 has four spring seat plate mounting slots 4, and the upper spring seat plate 3 for mounting the upper shock-absorbing spring 11 is provided in the spring seat plate mounting slots 4. The upper spring seat plate 3 is arranged vertically and vertically corresponding to the support seat plate 5. The support seat plate 5 is provided with several spring limiting posts 8 for mounting the lower shock-absorbing spring 6. A pair of longitudinal beams 1 and a pair of crossbeams 9 are detachably connected.

[0030] Example 2 This embodiment provides a vibration damping support for a vibrating screen in a coal preparation plant. The main difference from Embodiment 1 is that in this embodiment, the upper end of the damper 2 is hinged to the side wall of the longitudinal beam 1, and the lower end of the damper 2 is hinged to the side wall of the support plate 5.

[0031] Example 3 This embodiment provides a vibration damping support for a vibrating screen in a coal preparation plant. The main difference from Embodiment 1 is that in this embodiment, several of the lower damping spring assemblies are symmetrically arranged on a pair of longitudinal beams 1.

[0032] Example 4 This embodiment provides a vibration damping support for a vibrating screen in a coal preparation plant. The main difference from Embodiment 1 is that in this embodiment, the number of lower damping springs 6 is greater than the number of upper damping springs 11. For ease of on-site hoisting, two pairs of lifting lugs 7 are also provided on the longitudinal beam 1.

[0033] Specifically, when using the vibration damping support for a coal preparation plant's vibrating screen provided by this utility model to modify the vibrating screen, the specific operating steps are as follows: Benchmark measurement and positioning: Using the low plane of the old spring support as a benchmark, use a level to measure downwards by 435mm to determine the installation benchmark position of the support plate 5.

[0034] When the screen is not stopped, the old support is pre-treated: Replace it during the coal preparation plant's downtime for maintenance. Since the maintenance time is usually 8 hours and each replacement time is required to be less than 10 hours, the old support can be cut at 435mm when the screen is not stopped, using the gas cylinder cutting method.

[0035] Screen body hoisting and separation: After receiving the equipment shutdown signal, use the workshop gantry crane to hoist the screen body into the air, so that it is completely separated from the old support.

[0036] Completely cut old supports: Continue cutting the remaining four old supports until all old supports have been cut and removed.

[0037] Positioning and spot welding of support plate: Place support plate 5 on the upper part of the old support, perform preliminary positioning according to the measured reference position and drawing requirements, and then perform spot welding to fix the position of support plate 5.

[0038] Installation of the lower damping spring: After the support plate 5 is welded, place the lower damping spring 6 stably on the support plate 5 to ensure that the position of the lower damping spring 6 is accurate.

[0039] Longitudinal beam hoisting: Hang the electric hoist on the vibrating screen, hoist the longitudinal beam using the electric hoist, and adjust the position of the longitudinal beam to align it with the connection part of the support plate 5 and the vibrating screen according to the drawings.

[0040] Beam hoisting and bolt connection: Hoist the beam to the designated position and use bolts to connect the beam to the longitudinal beam and other related components, ensuring that the connection is firm and the bolt tightening torque meets the design requirements.

[0041] Damper support welding: According to the drawing requirements, the damper support is welded to the support plate 5 and the side wall of the longitudinal beam. During the welding process, the welding quality is strictly controlled to ensure that the height and length of the weld meet the specifications and to avoid defects such as incomplete welding and missing welding.

[0042] Full welding at the bottom of the support base plate: Full welding is performed on the bottom of the support base plate 5 to ensure a firm connection between the support base plate 5 and other components, thereby enhancing the stability of the overall structure.

[0043] Vibrating screen reset: Install damping springs on the longitudinal beams, slowly lower the vibrating screen to ensure proper connection between the vibrating screen and the newly installed lower damping springs, ensuring that all components are subjected to uniform force, thereby completing the secondary vibration reduction modification.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A coal preparation plant vibrating screen damping support, which is elastically connected below the coal preparation plant vibrating screen, characterized in that: It includes a frame consisting of a pair of longitudinal beams and a pair of transverse beams, several lower damping spring assemblies, and several pairs of dampers; Several of the lower damping spring assemblies are elastically connected to the bottom of the longitudinal beam. Each lower damping spring assembly includes a support plate and several lower damping springs disposed on the support plate. A pair of dampers are respectively hinged between the longitudinal beam and each of the support plates.

2. The coal preparation plant vibrating screen anti-vibration mount of claim 1, wherein: The upper part of the longitudinal beam is provided with several spring seat plate mounting slots, and the upper spring seat plate for mounting the upper shock-absorbing spring is provided in the spring seat plate mounting slot.

3. The coal preparation plant vibrating screen anti-vibration mount of claim 2, wherein: The upper spring seat plate and the support seat plate are arranged correspondingly in the upper and lower positions.

4. The vibration damping support for a coal preparation plant vibrating screen according to claim 1, 2, or 3, characterized in that: The support plate is provided with several spring limiting posts for installing the lower shock absorber spring.

5. Coal preparation plant vibrating screen anti-vibration mount according to claim 4, characterized in that: The upper end of the damper is hinged to the side wall of the longitudinal beam, and the lower end of the damper is hinged to the side wall of the support plate.

6. The coal preparation plant vibrating screen anti-vibration mount of claim 1, wherein: Several of the lower damping spring assemblies are symmetrically arranged on a pair of longitudinal beams.

7. The coal preparation plant vibrating screen anti-vibration mount of claim 2, wherein: The number of lower damping springs is greater than the number of upper damping springs.

8. The vibration damping support for a coal preparation plant vibrating screen according to claim 1, 2, 3, 6, or 7, characterized in that: The pair of longitudinal beams and the pair of transverse beams are detachably connected.

9. The coal preparation plant vibrating screen anti-vibration mount according to claim 1 or 2 or 3 or 6 or 7, characterised in that: Two pairs of lifting lugs are also provided on the longitudinal beam.

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