CN217898930U - Low-noise pressure release valve - Google Patents

Abstract

The utility model provides a low noise relief valve, is including setting up the pressure relief valve frame on automobile body, swing joint has a plurality of pressure relief valve blocks on the pressure relief valve frame, its characterized in that, be provided with the balancing weight on the pressure relief valve block, every balancing weight is different on the pressure relief valve block, the balancing weight is for inhaling the sound piece. The weight of the balancing weight that sets up on the relief valve piece is different on every pressure release valve piece, consequently when inside atmospheric pressure of car is different with external atmospheric pressure, can be according to the size of atmospheric pressure difference, open the pressure release valve piece of different degrees by oneself, low-speed has been reduced, noise during the low atmospheric pressure difference, and the balancing weight sets up on the relief valve piece, need not carry out the mould sinking again of relief valve, direct mount can, reduction in production cost, the balancing weight is for inhaling the sound piece, can guarantee that pressure release valve piece self-adaptation opens simultaneously, the ability of making an uproar falls in inhaling of relief valve has been increased by a wide margin.

Description

Low-noise pressure release valve

Technical Field

The utility model belongs to the technical field of auto-parts and specifically relates to a low noise relief valve is related to.

Background

Nowadays, automobiles gradually become the vehicle which is just needed when family members go out, and the requirement of people on the comfort level of the automobiles is gradually improved. Therefore, the NVH index of the automobile also becomes an important performance index of the automobile selected by the customer. Along with the improvement of present automobile manufacturing technology, the sealing performance in the automobile has also reached a more perfect level, nevertheless because the in-process of closing the door has some air to extrude in the passenger cabin, causes the atmospheric pressure in the passenger cabin to be higher than external atmospheric pressure to and in the automobile driving process, the outside atmospheric pressure of automobile also can make the atmospheric pressure in the passenger cabin be higher than external atmospheric pressure because the reason of external air velocity reduces.

The automobile pressure relief valve can automatically open and close through the difference between the internal pressure and the external pressure to achieve the effect of balancing the internal pressure and the external pressure, the automobile pressure relief valve on the market at present generally comprises a valve body and blades, the blades are hinged at an air outlet of the valve body, and when the internal pressure of an automobile is higher than the external pressure of the automobile and reaches a critical value, the blades are pushed away to exhaust. When the pressure inside and outside the vehicle is rebalanced, the blades are closed again under the action of the gravity of the blades, and external air is prevented from entering the vehicle.

However, the pressure relief valve for the automobile on the market at present has certain defects, and in the process of opening the valve plate, external airflow sound, vibration sound generated by the automobile and noise of an engine can be transmitted into the automobile, so that the comfort level of a driver and passengers in the automobile is influenced.

For example, chinese patent publication No. CN202110670043 discloses a "water-proof noise reduction type vehicle body pressure release valve", which includes a valve body, a waterproof cover, a labyrinth check valve, and a soundproof cover, wherein the valve body includes one or more openings, and a valve sheet is fitted at each opening; the waterproof cover is arranged on the outer side of the valve body; the labyrinth one-way valve is arranged at the bottom of the waterproof cover and comprises a one-way valve channel, and multiple water retaining sheets are arranged in the one-way valve channel to form a transverse multi-fold return channel, and each water retaining sheet is arranged in a staggered manner and inclines downwards; the sound-proof cover covers the outer part of the waterproof cover. Compared with the prior art, the invention can effectively prevent water flow from entering the vehicle through the pressure release valve, can simultaneously solve the problem of water leakage in a wading scene, and reduces road noise, wind noise and exhaust noise transmitted to the vehicle through the pressure release valve.

The existing patents have the following disadvantages: (1) The opening degree of the pressure relief valve plate under different vehicle speeds and different air pressure differences cannot be automatically adapted; (2) The sound-proof cover is additionally arranged outside the automobile pressure release valve, so that the cost of the die is increased, and the modification cost of the conventional pressure release valve is high; (3) The sound-proof housing can effectively prevent external noise from entering the vehicle, but cannot effectively eliminate airflow noise generated when air in the vehicle is exhausted through the pressure release valve.

Disclosure of Invention

To prior art who mentions in the background art through add the sound-proof housing in the relief valve outside and solve the external noise and get into the car in, but unable self-adaptation ground is according to the degree of opening of speed of a motor vehicle, the atmospheric pressure difference change valve block, increases the problem of production transformation cost, the utility model provides a low noise relief valve controls the pressure release valve block through the weight that changes the balancing weight of setting on different pressure release valve blocks and opens different valve blocks according to different speeds of a motor vehicle and atmospheric pressure difference, and need not set up the mould again and make, and production transformation is with low costs.

The second invention of the utility model aims at solving the problem that the pressure release valve can not eliminate the air flow noise generated when the air in the vehicle is discharged through the pressure release valve.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a low noise relief valve, is including setting up the pressure release valve frame on automobile body, swing joint has a plurality of pressure release valve blocks on the pressure release valve frame, be provided with the balancing weight on the pressure release valve block, every balancing weight is different on the pressure release valve block. The weights arranged on the pressure relief valve plates have different weights on each pressure relief valve plate, wherein the weights on each pressure relief valve plate can be of an integrated structure with different weights or of a separated structure with different weights formed by a plurality of weights; when the air pressure in the automobile is different from the air pressure outside, the pressure relief valve plates with different degrees can be automatically opened according to the air pressure difference, especially in the running process of the automobile, due to the difference of the speed of the automobile, the air pressure values generated by different air flow rates outside are different, when the automobile runs at low speed and the air pressure difference between the inside and the outside is small, due to the arrangement of the balancing weights with different weights, the pressure relief valve plates can be opened only by one or two, but not all the pressure relief valve plates can be opened together.

Preferably, the weight block is a sound absorbing member. The balancing weight is a sound absorbing part, can guarantee that the pressure relief valve block is self-adaptive to be opened, and simultaneously, the sound absorbing and noise reducing capacity of the pressure relief valve is greatly increased, the sound absorbing part comprises but is not limited to a porous sound absorbing material, and because the balancing weight is arranged on the upper surface of the pressure relief valve block, the noise entering the vehicle through the air outlet can be absorbed when the pressure relief valve block is opened, and the purpose of the second invention is realized. The weight block can be completely composed of the sound absorption module, the effect of changing the weight of the weight block is realized by changing the covering area of the sound absorption module on the pressure relief valve plate, the thickness of the sound absorption module, the material density of the sound absorption module and the like, and the production and installation process using the mode is simple and convenient and has low cost; the balancing weight also can realize making an uproar and the technological effect that the counter weight exists simultaneously through the mode of inhaling the combination of sound module and counter weight module, use this kind of mode to process the sound absorption effect and the counter weight effect of balancing weight respectively, wherein inhale the sound module can with counter weight module formula as an organic whole, also can be the separation and combination formula.

Preferably, the balancing weight is detachably connected with the pressure relief valve plate. The counterweight block and the pressure relief valve block can be detachably connected, including but not limited to, buckling connection, bolt connection and insertion connection, so that the effect of free assembly is realized, and the counterweight block on the pressure relief valve block can be quickly processed and replaced according to the user requirements; the balancing weight still can dismantle with the pressure release valve frame and be connected, and the pressure release valve block can set up the jack of leaving the allowance for movement with the balancing weight, carries out swing joint with the pressure release valve frame that is provided with the bolt, and this connected mode is simple convenient, and is not fragile and with low costs.

Preferably, the pressure relief valve plates are longitudinally arranged on the pressure relief valve frame, and the weight of the balancing weight on each longitudinally arranged pressure relief valve plate is increased from top to bottom. The arrangement method can ensure that when the air pressure difference is not large, and only the front pressure relief valve plates are opened, the air outlet generating noise and the impact part generating noise when the pressure relief valve plates are closed are closer to the rest sound absorbing parts, so that a better sound absorbing effect can be obtained; in order to realize similar effect, the method for alternately installing the balancing weights with different weights can be used, so that when only the front few pressure relief valve plates with lighter balancing weights are opened, the air outlet can be closer to the balancing weight with good sound absorption effect.

Preferably, the balancing weight is provided with a sound absorbing layer and a counterweight layer, the sound absorbing layer is arranged far away from the pressure relief valve plate, and the counterweight layer is arranged close to the pressure relief valve plate. The sound absorption layer is arranged above the counterweight layer and is in direct contact with the external environment, so that the normal function of the pressure relief valve plate can be guaranteed, and the sound absorption layer can absorb noise passing through the pressure relief valve at the maximum efficiency. The technical effects of different weights of the counter weights on different pressure relief valve plates are achieved by changing the coverage area of the counter weight layer on the pressure relief valve plates, the thickness of the counter weight layer, the density material of the counter weight layer and the like; the sound absorption layer can be matched with the counterweight layer to realize the counterweight function by changing the coverage area of the sound absorption layer, the thickness of the sound absorption layer, the material density of the sound absorption layer and the like; the cover area of the sound absorption layer can be designed to be the same as the area of the pressure release valve plate to achieve the maximum sound absorption effect, and the effect that different pressure release valve plates have different counterweights is achieved by independently changing the counterweight layer. This scheme can further promote the equipment degree of freedom of balancing weight, can mainly consider the influence to the sound absorbing effect when designing the sound absorbing layer, can mainly consider the firm degree of connecting to the influence of whole counter weight and on the pressure relief valve piece when designing the counter weight layer.

Preferably, the upper surface of the pressure relief valve sheet and the lower surface of the balancing weight are both provided with magnetic adhesive layers. Consider that the pressure release valve block can often move about when having the atmospheric pressure difference to during the balancing weight can be in the air current, balancing weight and the laminating of pressure release valve block magnetism can be on the basis that does not influence the counter weight effect, increase the cooperation firmness of balancing weight and pressure release valve block, prevent that the balancing weight from breaking away from under the influence of vibration, air current, influence the function and the noise reduction of opening and shutting of pressure release valve block.

Preferably, the edge of the inner wall of the pressure relief valve plate is provided with a sealing rubber strip. The sealing rubber strip is arranged on the inner wall of the pressure relief valve plate, so that the sealing effect in the vehicle can be effectively improved when the pressure relief valve plate is closed, the interference of external noise is reduced, and the noise generated by the contact between the pressure relief valve plate and the pressure relief valve frame is reduced when the pressure relief valve plate is opened and closed; the balancing weights of different weights are arranged on the pressure release valve block, the whole weight of the pressure release valve block provided with the heavier balancing weight is larger, the sealing rubber strip can provide better buffering in the closing process of the pressure release valve block, and the situation that the balancing weight is additionally arranged to produce larger noise in the closing process of the pressure release valve block is avoided.

Has the beneficial effects that: (1) The effect that the pressure relief valve plates are opened in different degrees at different air pressure differences is achieved by changing the weights of the balancing weights arranged on the different pressure relief valve plates; (3) The counterweight block is detachably connected, so that more choices are provided for customers, the counterweight block is convenient to detach and install, and the cost is saved; (4) The counterweight blocks are arranged in different ways, so that the maximum sound absorption and noise reduction effect can be ensured, and meanwhile, the counterweight can be arranged according to production requirements; (5) The sealing rubber strips on the inner wall of the pressure relief valve block improve the sealing degree in the vehicle and provide buffer for the pressure relief valve block, and particularly the pressure relief valve block provided with the heavy-weight balancing weight effectively reduces noise.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 3 is a schematic structural diagram of embodiment 3 of the present invention.

Fig. 4 is a schematic structural diagram of embodiment 4 of the present invention.

Fig. 5 is a schematic structural diagram of embodiment 5 of the present invention.

Fig. 6 is a schematic side view of the mounting weight of the present invention.

Fig. 7 is a schematic side view of the present invention without a counterweight.

In the figure: 1. pressure relief valve frame, 2, pressure relief valve block, 21, first valve block, 22, second valve block, 23, third valve block, 24, fourth valve block, 25, joint strip, 3, balancing weight, 31 sound absorbing layer, 32 counterweight layer, 4, magnetism laminating layer.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.

Example 1:

as shown in fig. 1, a low noise relief valve, including setting up the pressure relief valve frame 1 on automobile body, swing joint has pressure relief valve block 2 on the pressure relief valve frame 1, and pressure relief valve block 2 is including first valve block 21, second valve block 22, third valve block 23, fourth valve block 24, and pressure relief valve block 2 upper surface is provided with balancing weight 3, and wherein balancing weight 3 is for inhaling the sound piece, 3 top-down weight increases of balancing weight on each pressure relief valve block 2 of vertically arranging.

The weight difference of the balancing weight 3 on each pressure relief valve block 2 is realized by arranging the balancing weight 3 with different coverage areas on the pressure relief valve block 2, so that when the air pressure in the automobile is different from the air pressure outside, the pressure relief valve blocks 2 with different degrees can be automatically opened according to the air pressure difference, particularly, in the running process of the automobile, the air pressure values generated by different air flow rates outside are different due to the difference of the automobile speed, the pressure relief valve blocks 2 cannot be completely opened due to the arrangement of the balancing weights 3 with different weights in the low-speed running process, the noise generated by the self movement of the pressure relief valve blocks 2 and the noise range generated by the passing of the air flow are reduced in the opening and closing process, and the noise entering the automobile from the outside is also reduced due to the fact that the pressure relief valve blocks 2 are not completely opened; the counterweight 3 is arranged on the pressure relief valve plate 2, and the pressure relief valve frame 1 can be directly installed without re-opening the die, so that the production cost is reduced; the balancing weight 3 which is a sound absorbing part is arranged on the upper surface of the pressure relief valve plate 2, and can absorb noise entering the vehicle through the air outlet when the pressure relief valve plate 2 is opened; the weights 3 on the pressure relief valve plates 2 are sequentially increased in weight in the longitudinal downward direction, and the arrangement method can ensure that when the air pressure difference is not large, and only the front pressure relief valve plates 2 are opened, the distance from the air outlet generating noise and the impact part generating noise when the pressure relief valve plates 2 are closed to other sound absorbing parts is shorter, so that a better sound absorbing effect can be obtained; the balancing weight 3 is completely composed of the sound absorption module, and the production and installation process using the mode is simple and convenient and has low cost.

As shown in fig. 6 and 7, the weight member 3 is connected to the pressure relief valve plate 2 by a snap fit.

The balancing weight 3 is connected through the buckle with pressure release valve block 2 and has realized the effect of free assembly, can handle the change according to user's demand swiftly to balancing weight 3 on the pressure release valve block 2, also can adopt simultaneously as shown in fig. 6, 7 balancing weight 3 and pressure release valve block 2 through the mode swing joint of pegging graft on pressure release valve frame 1, also can realize the same effect.

As shown in fig. 2, the upper surface of the pressure relief valve plate 2 and the lower surface of the weight block 3 are both provided with magnetic adhesion layers 4.

Pressure release valve block 2 can often move about when having the atmospheric pressure difference to during balancing weight 3 can be in the air current, the lower surface of balancing weight 3 and the upper surface of pressure release valve block 2 are equipped with magnetism laminating layer 4, can realize the magnetism laminating between them, on the basis that does not influence the counter weight effect, increase balancing weight 3 and pressure release valve block 2's cooperation firmness, prevent that balancing weight 3 from breaking away from under the influence of vibration, air current, influence the function and the noise reduction of opening and shutting of pressure release valve block 2.

As shown in fig. 6 and 7, a sealing rubber strip 25 is arranged on the edge of the inner wall of the pressure relief valve plate 2.

The inner wall of the pressure relief valve plate 2 is provided with a sealing rubber strip 25, so that the sealing effect in a vehicle can be effectively improved when the pressure relief valve plate 2 is closed, the interference of external noise is reduced, and the noise generated by the contact between the pressure relief valve plate 2 and the pressure relief valve frame 1 is reduced when the pressure relief valve plate 2 is opened and closed; the balancing weight 3 of different weight sets up on pressure release valve block 2, and it is great wherein to be provided with the whole weight of pressure release valve block 2 than weight balancing weight 3, and joint strip 25 can provide better buffering at the closed in-process of pressure release valve block 2, has avoided producing the condition of great noise at the closed in-process of pressure release valve block 2 owing to add balancing weight 3.

The assembly process of the low noise pressure relief valve in this embodiment is as follows: at first install pressure release valve block 2 on pressure release valve frame 1, guarantee that pressure release valve block 2 can normally rotate, can dismantle the balancing weight 3 that lightest with weight and first valve block 21 and be connected, follow-up balancing weight 3 and the second valve block 22 of below with weight increase in proper order, third valve block 23, fourth valve block 24 is connected, accomplish balancing weight 3 and pressure release valve block 2's installation back, link to each other pressure release valve frame 1 and automobile body, accomplish the assembly of low noise pressure release valve.

Example 2:

as shown in fig. 2, the counterweight block 3 is provided with a sound absorbing layer 31 and a counterweight layer 32, the sound absorbing layer 31 is arranged far away from the pressure relief valve plate, and the counterweight layer 32 is arranged close to the pressure relief valve plate.

What is different from embodiment 1 is, balancing weight 2 is not totally by inhaling the sound module in this embodiment and constitutes, sound absorbing layer 31 sets up in balancing weight layer 32 top, with external environment direct contact, can be when guaranteeing that pressure release valve block 2 normally realizes the function, sound absorbing layer 31 can maximum efficiency absorb the noise through relief valve 2, and sound absorbing layer 31's area accomplishes the maximize, adjust 3 holistic weights of balancing weight through the area of covering that changes below balancing weight layer 32, thereby when realizing the sound absorbing effect maximize, can be according to opening of inside and outside atmospheric pressure difference adaptive control pressure release valve block 2.

Example 3:

as shown in fig. 3, different from embodiment 1, in this embodiment, the weight of the weight block 3 is controlled by changing the thickness of the weight block 3, so that the coverage area of the weight block 3 on each pressure relief valve plate can be maximized, the sound absorption area is enlarged, the self-adaptive opening function of the pressure relief valve plates is not affected, and the overall noise reduction capability of the low-noise pressure relief valve is improved to the maximum extent on the basis of convenient production and manufacture and low cost

Example 4:

as shown in fig. 4, different from embodiment 3, in this embodiment, on the basis of ensuring the maximum sound absorption area of the weight block 3 on each pressure relief valve plate 2, the effect of changing the overall weight of the weight block 3 is achieved by changing the material and density of the sound absorption module, so as to realize the self-adaptive opening function of the pressure relief valve plates; further, increase balancing weight 3's weight and noise-absorbing effect in proper order from first valve block 21 to fourth valve block 24, balancing weight 3's weight on fourth valve block 24 is the biggest and the sound-absorbing effect is best, travel at low speed, under the less condition of atmospheric pressure difference, it is lighter only to open top weight, the general first valve block 21 of noise-absorbing effect or second valve block 22, noise at this moment is not big, the performance its value that the sound-absorbing material of general effect can maximize, and under high-speed or atmospheric pressure difference great condition, air velocity is higher, automobile engine rotational speed is very fast, the noise of production risees, at this moment, pressure release valve block 2 is whole to be opened, balancing weight 3 that the sound-absorbing effect of below is good can exert the biggest effect at this moment, this scheme can be more economical and reasonable with balancing weight 3's noise-absorbing effect maximize.

Example 5:

as shown in fig. 5, different from embodiment 1, the weight of the weight block 3 in this embodiment is not sequentially increased from top to bottom, but an insertion installation method is adopted, the weight block 3 with the lightest weight is installed on the first valve plate 21, the weight block 3 with the heaviest weight is installed on the second valve plate 22, the weight block 3 with the lighter weight is installed on the third valve plate 23, and the weight block 3 with the heavier weight is installed on the fourth valve plate 24, in this scheme, the pressure relief valve plate 2 is opened only a few times at a low or medium speed, and when the insertion opening is performed, the weight block 3 on the pressure relief valve plate 2 which is not opened can be closer to a noise source and a noise propagation channel, so that the overall sound absorption and noise reduction effect of the weight block 3 at a low speed and when the air pressure difference is small is improved.

In addition to the above embodiments, in the scope disclosed in the claims and the specification of the present invention, the detachable weight block can be readjusted and combined according to different types of automobiles and different applicable environments to constitute new embodiments, which can be realized by those skilled in the art without creating labor, so that the embodiments of the present invention not described in detail should also be regarded as specific embodiments of the present invention and are within the protection scope of the present invention.

Claims (7)

1. The utility model provides a low noise relief valve, is including setting up pressure release valve frame (1) on automobile body, swing joint has a plurality of pressure release valve blocks (2) on pressure release valve frame (1), its characterized in that, be provided with balancing weight (3) on pressure release valve block (2), every balancing weight (3) weight difference on pressure release valve block (2).

2. A low noise pressure relief valve according to claim 1 characterized in that said weight (3) is a sound absorbing member.

3. A low noise pressure relief valve according to claim 1 characterized in that said weight (3) is detachably connected to said pressure relief valve plate (2).

4. The low-noise pressure relief valve according to claim 1, characterized in that the pressure relief valve plates (2) are longitudinally arranged on the pressure relief valve frame (1), and the weight of the weight block (3) on each longitudinally arranged pressure relief valve plate (2) is increased from top to bottom.

5. A low noise pressure relief valve according to any of claims 1-4 characterized in that the counterweight (3) is provided with a sound absorbing layer (31) and a counterweight layer (32), the sound absorbing layer (31) is arranged away from the pressure relief valve plate, and the counterweight layer (32) is arranged close to the pressure relief valve plate.

6. A low noise pressure relief valve according to any of claims 1-4, characterized in that the upper surface of the pressure relief valve plate (2) and the lower surface of the weight block (3) are provided with magnetic adhesive layers (4).

7. A low noise relief valve according to any of claims 1-4 characterized in that the edge of the inner wall of the relief valve plate (2) is provided with a sealing rubber strip (25).

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