CN206754255U - Whole body vibration cushion blocking - Google Patents

Abstract

The utility model belongs to the technical field of whole-body vibration protection, and provides a whole-body vibration damping pad, comprising a wear-resistant layer (1) on the top layer, a vibration-damping layer (2) on the middle layer, and an anti-skid layer (3) on the bottom layer; An anti-slip textured surface (4) is arranged on the wear-resistant layer (1), and the shock-absorbing layer (2) is made of expanded polystyrene. Beneficial effects: It can significantly reduce the whole body vibration level at the operation site of the power station, especially the low frequency whole body vibration level; it can facilitate the splicing and disassembly of the vibration damping pad, and can meet the needs of different sizes of operation sites; it can meet the needs of power generation It has good convenience for disassembly and assembly; it can provide good anti-skid effect for on-site operators.

Description

Whole Body Vibration Pads

technical field

The utility model belongs to the technical field of whole body vibration protection, and relates to a vibration damping pad used for slowing down the whole body vibration of a power station.

Background technique

The impact of vibration on the human body is divided into whole-body vibration and local vibration. The whole-body vibration is caused by the vibration source (vibration machinery, vehicle, movable work platform) through the supporting parts of the body (foot and buttocks), and the vibration is transmitted along the lower limbs or torso. Transmission of the whole body mainly causes indirect vibration. Contact with strong whole-body vibration may cause damage or displacement of internal organs, changes in peripheral nerve and blood vessel functions, and may cause various types of tissue and biochemical changes, resulting in tissue malnutrition. Such as foot pain, fatigue of lower limbs, weakened dorsum pulse of the foot, and lower skin temperature. Vibration acceleration can also cause vestibular dysfunction, resulting in dysfunction of inner ear regulation and balance, pale complexion, nausea, vomiting, cold sweat, headache, dizziness, Symptoms such as shallow breathing, decreased heart rate and blood pressure, etc., can also cause lumbar spine injury and other motor system effects in severe cases.

Through on-site investigation and measurement, it is found that the whole-body vibration level of the power station is relatively high, and the maximum value of the whole-body vibration acceleration can reach 1.6m/s2. Spectrum analysis shows that the peak value of the whole-body vibration spectrum of the power station is mainly concentrated at 0.5-1.6Hz. According to the "Evaluation of Mechanical Vibration and Shock Human Exposure to Whole-body Vibration Part 1: General Requirements" (GB/T 13341.1-2007/ISO 2631-1:1997), combined with the horizontal acceleration value of whole-body vibration in power stations, operators It may feel very uncomfortable when performing on-site operations at the station. The standard recommends that the workers should not stay in this area for more than 1 hour as much as possible, otherwise the occupational health and comfort of the on-site workers may be greatly affected, and there may be certain Security risks.

Features of on-site operation in power stations: 1. The inspection area of the operation site of the power station is relatively large, and the areas with whole-body vibration hazards are widely distributed and scattered; Lifting hole for equipment hoisting operation.

At present, there is no vibration-absorbing pad designed and developed for the hazards of whole-body vibration in power stations. Similar products mainly include vibration-absorbing insoles and shock-absorbing seat cushions: vibration-absorbing insoles are mainly designed and developed for athletes. Although vibration-absorbing insoles have good comfort, However, for the on-site operation characteristics of power stations, the vibration-absorbing insoles have the following deficiencies: The vibration-damping insoles are not designed and developed for power stations, and their vibration-reducing effects on the whole-body vibration hazards of power stations are not clear, especially for power stations. There is a whole body vibration hazard at a low frequency of 0.5-1.6Hz. The vibration-absorbing seat cushion is mainly designed and developed for the driver. Although it can reduce the whole-body vibration level generated by the driver while driving the vehicle and improve driving comfort, for the on-site operation characteristics of the power station, the shock-absorbing seat cushion There are the following deficiencies: 1. The driving posture of the driver is generally a sitting posture, while the working posture of the on-site operators of the power station is generally a standing posture. Different working postures may affect the vibration reduction effect of the shock-absorbing seat cushion; 2. The vehicle is in a sitting posture. The frequency spectrum characteristics during driving are not exactly the same as those when the power station is running. Therefore, the vibration reduction effect of the shock absorbing cushion for the whole body vibration hazard of the power station is not clear; 3. The operating area of the power station is large, and there is a whole body vibration hazard The area is widely distributed, and the shock-absorbing cushion cannot meet the needs of large-area laying at the power station operation site. To sum up, neither the shock-absorbing insoles nor the shock-absorbing seat cushions are suitable for the protection of whole-body vibration hazards in power stations.

Therefore, it is necessary to provide an improved technical solution to overcome the technical problems existing in the prior art.

Contents of the invention

The purpose of the utility model is to provide a solution for alleviating the whole-body vibration of the power station, which can significantly reduce the whole-body vibration level at the operation site of the power station, especially the low-frequency whole-body vibration level unique to the working environment of the power station.

In order to achieve the above object, the utility model provides a whole body vibration damping pad, comprising a wear-resistant layer on the top layer, a vibration-damping layer on the middle layer and an anti-slip layer on the bottom layer; anti-slip lines are arranged on the wear-resistant layer On the surface, the material of the damping layer is expanded polystyrene.

The wear-resistant layer is used to contact the body of the staff and has a good wear-resistant effect. The damping layer plays an overall damping role, effectively reducing the vibration amplitude and acceleration of the staff on the upper part of the wear-resistant layer. The anti-slip layer is used to contact the ground and maintain a high level of friction with the ground. As far as the working environment of the power station is concerned, the operators have high requirements for the anti-slip effect of the ground when performing on-site operations. Therefore, the design of the anti-slip surface is to increase the friction between the wear-resistant layer and the contact surface of the staff to prevent skidding. According to the frequency spectrum analysis of the pre-test results of the power station, and referring to the whole body vibration level and spectrum analysis results, the appropriate ratio of vibration-damping materials is selected from various materials, and the EPS material, that is, expanded polystyrene, is determined as the vibration-damping material. According to the whole-body vibration characteristics of power stations and the need for hazard protection, its vibration-reducing and shock-absorbing effects, especially for low-frequency whole-body vibrations of 0.5-1.6 Hz in power stations, are the most excellent.

Preferably, the anti-slip textured surface is an anti-slip protrusion or groove cast and carved on the wear-resistant layer.

Also preferably, the anti-slip textured surface is several anti-slip protrusions fixedly installed on the wear-resistant layer.

The non-slip textured surface can be structurally selected according to specific process requirements and needs. The casting and carving structure has the characteristics of good integrity, simple manufacture, low cost and good skid resistance. The non-slip textured surface formed by fixedly installed anti-slip protrusions has the advantage of easy maintenance in the event of wear or damage.

Preferably, between the wear-resistant layer and the vibration-damping layer, and/or between the vibration-damping layer and the anti-slip layer, there are vibration-damping conductive strips arranged at equal distances and in the same direction.

The function of the vibration-damping conductive strip is to transmit the vibration from the part to the whole, make full use of all parts of the vibration-damping pad, and homogenize the vibration, so as to maximize the vibration-damping effect.

Further preferably, the vibration-damping conductive strip is a rubber strip.

When the rubber strip is selected as the vibration-damping conductive strip, the rubber strip itself has excellent elasticity and moderate compression ratio to achieve the purpose of smoothly guiding the direction of the vibration force.

Also further preferably, the vibration-damping conductive strips are strip-shaped cavities formed between two adjacent layers.

When the strip-shaped cavity is selected as the vibration-damping conductive strip, not only can a good vibration dispersion effect be obtained, but also the amount of expanded polystyrene can be reduced and the cost input can be controlled.

Preferably, the wear-resistant layer is spliced by a plurality of wear-resistant assembly blocks.

Preferably, the wear-resistant assembly blocks are spliced by a Velcro patch assembly, and the Velcro patch assembly includes an adhesive surface piece and a rough surface piece matched with the adhesive surface piece.

When designing, the wear-resistant layer extends outwards with a rectangular convex surface, and the sticky surface or rough surface of the magic splicing assembly is embedded on the rectangular convex surface of the wear-resistant layer; Concave surface, the rough surface part or sticky surface part of the Velcro splicing component is fixed on the rectangular concave surface of the vibration-absorbing layer located in the middle layer.

The Velcro splicing components are used to complete the mutual splicing function, which is convenient for daily use and installation, so that the vibration-absorbing pad can be used in different sizes of work areas.

Preferably, the whole body vibration damping pad further includes a hidden lifting belt, and the hidden lifting belt is installed on the anti-slip layer facing the side of the vibration damping layer. The hidden lifting belt is structurally hidden at the bottom of the damping pad, and it can be pulled out when in use, which is convenient for maintenance or replacement, and the vibration damping pad is separated from the ground, which is easy to operate and has high durability.

Preferably, the whole body vibration damping pad is placed in a place with vibration in the working environment of the power station, and the place is placed in such a way that the anti-slip layer contacts the surface of the position, and the wear-resistant layer faces upward for people to stand and touch.

Compared with the prior art, the utility model has the beneficial effects of:

It can significantly reduce the whole-body vibration level at the operation site of the power station, especially the low-frequency whole-body vibration level; the equipped magic splicing components can facilitate the splicing and disassembly of the vibration-damping pad, which can meet the needs of different sizes of operation sites Use; equipped with hidden lifting straps, it can meet the needs of on-site installation and daily maintenance of power stations, and has good disassembly and assembly convenience; the surface of the vibration-absorbing pad is provided with a non-slip texture surface, which can provide good anti-slip effect for on-site operators .

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a whole body vibration damping pad of the present invention.

Fig. 2 is a schematic diagram of the side structure of a whole body vibration damping pad of the present invention.

Fig. 3 is a schematic diagram of a partial three-dimensional structure of a whole-body vibration damping pad of the present invention.

Fig. 4 is a schematic diagram of the side structure of another whole body vibration damping pad of the present invention.

Figure 5 is a histogram of the vibration damping effect of the whole body vibration damping pad at different frequencies.

Figure 6 is a characteristic diagram of the vibration spectrum at the operation site of the whole body vibration damping pad.

in:

Wear-resistant layer; 2. Vibration damping layer; 3. Anti-slip layer; 4. Anti-slip surface; 5. Anti-slip protrusions; 10. Concealed lifting belt.

detailed description

In order to better understand the utility model, the following specific implementations are given for analysis and understanding, but it should be understood that the utility model is not limited thereto. Equivalent replacements should also be understood to be included in the spirit of the present invention.

Example 1

Referring to Fig. 1, Fig. 2 and Fig. 3, the present embodiment provides a whole-body vibration damping pad, which is characterized in that it includes a wear-resistant layer 1 on the top layer, a vibration-damping layer 2 on the middle layer and a bottom layer The anti-slip layer 3; the wear-resistant layer 1 is provided with an anti-slip textured surface 4, and the shock-absorbing layer 2 is made of expanded polystyrene. The anti-slip texture surface 4 is an anti-slip protrusion 5 cast and carved on the wear-resistant layer 1, and of course it can also be designed as an anti-slip groove concave inward in structure. The whole body vibration damping pad of the present embodiment also includes a Velcro splicing assembly 7 and a hidden lifting belt 10. The Velcro splicing assembly 7 includes an adhesive surface part 8 and a matte surface part 9 matching the adhesive surface part 8. The hidden lifting The belt 10 is installed on the anti-slip layer 3 on the side facing the vibration-damping layer 2 .

The following is the simulation test of the vibration damping pad in the laboratory

Test method: A six-degree space vibration table is used to simulate the vibration signal of the whole body vibration around the generator of the power station to test the vibration reduction performance of the above vibration damping pad. The test is carried out in a single frequency vibration mode: respectively at 0.5Hz, 0.63Hz, A total of 5 frequency points of 0.8Hz, 1Hz, and 1.25Hz are tested, and the axial direction is set to three axes, the amplitude is 5mm, and the voltage is set to 15V (vibration acceleration is about 2m/s ² ). During the test, respectively test the vibration acceleration of a blank group and the finished product of the shock absorbing pad in two situations, each group is tested 6 times, and each test is 1min (vibration measurement equipment uses SV106 multi-channel human body vibration measuring instrument, using SPSS14.0 software to measure Statistical analysis of the data), where the blank means that the vibration table is not covered with any damping material.

Test results: as shown in Table 1,

Table 1 Laboratory test results of vibration damping pads

Result analysis: The statistical method of two independent samples t test was used to statistically analyze the vibration reduction effect of the vibration damping pad in the laboratory. The results showed that the vibration acceleration value after using the vibration damping pad was significantly lower than that of the blank vibration table value (t=6.625, P<0.001), suggesting that the vibration-damping pad has a good vibration-damping effect, and the vibration-damping efficiency is about 77.9%. The results are shown in Table 2,

Table 2 Analysis of the vibration reduction effect of the vibration damping pad in the laboratory

In the laboratory test of the vibration damping pad, the histograms of vibration damping effects at 0.5Hz, 0.63Hz, 0.8Hz, 1Hz and 1.25Hz are shown in Figure 5.

The following is: On-site test of vibration damping pad in power station

Test method: Install the vibration damping pad around the generator of the power station for on-site test. During the test, test the vibration acceleration of the uncovered vibration damping pad group and the covered vibration damping pad group respectively. Each group is tested 6 times. The test lasted for 1 min (the vibration measurement equipment was SV106 multi-channel human body vibration measuring instrument, and the data was statistically analyzed using SPSS14.0 software).

Test results: as shown in Table 3,

Table 3 Vibration acceleration results of vibration damping pad operation field test

Result analysis: The statistical method of two independent samples t-test was used to statistically analyze the vibration reduction effect of the vibration-damping pad at the job site. The results showed that the vibration acceleration value of the covered vibration-damping pad was significantly lower than that of the non-covered vibration-damping pad. value (t=56.195, P<0.001), suggesting that the damping pad has a good damping effect at the job site, and the damping efficiency is about 89.7%. The results are shown in Table 4,

Table 4 Analysis of the vibration reduction effect of the vibration damping pad on the job site

By comparing the vibration acceleration 0.5-80Hz spectrogram of the uncovered vibration-damping pad and the covered vibration-damping pad, it is found that the vibration-damping pad has a better vibration reduction effect at 0.5-3.15Hz, especially at 0.8Hz. Refer to Figure 6 for the vibration frequency spectrum diagram of the shock pad operation site.

Example 2

Referring to Fig. 4, this embodiment provides another whole-body vibration damping pad, its structure is roughly the same as that provided in Embodiment 1, the difference is that an equidistant between the wear-resistant layer 1 and the damping layer 2 is provided. The vibration-damping conductive strips 6 arranged in the same direction are rubber strips.

Example 3

This embodiment provides another whole-body vibration damping pad, the structure of which is roughly the same as that provided in Embodiment 2, the difference lies in that the damping layer 2 and the anti-slip layer 3 are interposed with equidistant and in the same direction. The vibration-damping conductive strip 6 is a strip-shaped cavity formed between two adjacent layers.

Claims (10)

1. a whole-body vibration damping pad is characterized in that, comprising a wear-resistant layer (1) positioned at the top, a vibration-damped layer (2) positioned at the middle layer and an anti-slip layer (3) positioned at the bottom layer; positioned at the wear-resistant layer (1) is provided with an anti-slip textured surface (4), and the vibration-damping layer (2) is made of expanded polystyrene. 2. The whole-body vibration damping pad according to claim 1, characterized in that, the anti-slip surface (4) is an anti-slip protrusion (5) or groove cast and carved on the wear-resistant layer (1) . 3. The whole-body vibration damping pad according to claim 1, characterized in that, the anti-slip surface (4) is a plurality of anti-slip protrusions fixedly installed on the wear-resistant layer (1). 4. The whole body vibration damping pad according to claim 1, characterized in that, between the wear-resistant layer (1) and the damping layer (2), and/or the damping layer (2) Vibration-absorbing conductive strips (6) arranged equidistantly and in the same direction are sandwiched between the anti-slip layer (3). 5. The whole body vibration damping pad according to claim 4, characterized in that, the vibration damping conductive strip (6) is a rubber strip. 6. The whole body vibration damping pad according to claim 4, characterized in that, the vibration damping conductive strip (6) is a strip-shaped cavity formed between two adjacent layers. 7. The whole body vibration damping pad according to claim 1, characterized in that, the wear-resistant layer (1) is formed by splicing a plurality of wear-resistant assembly blocks. 8. The whole body vibration damping pad according to claim 7, characterized in that, the wear-resistant assembly block is spliced by a Velcro splicing assembly (7), and the Velcro splicing assembly (7) includes an adhesive surface (8) ) and the rough surface piece (9) that cooperates described adhesive surface piece (8). 9. The whole body vibration damping pad according to claim 1, is characterized in that, also comprises a concealed type lifting belt (10), and described hidden type lifting belt (10) is installed in the direction toward described damping layer ( 2) On the anti-slip layer (3) on one side. 10. The whole-body vibration damping pad according to claim 1, characterized in that, the whole-body vibration damping pad is placed in a position with vibration in the working environment of the power station, and its placement method is that the anti-skid layer (3) contacts the place On the surface of the above position, the wear-resistant layer (1) faces upwards for personnel to stand and touch.