CN216789237U

CN216789237U - Pressure regulating valve

Info

Publication number: CN216789237U
Application number: CN202123213769.6U
Authority: CN
Inventors: 巫一帆; 张佳; 汤阳杨; 胡涛涛; 赵拥军; 田春旭; 赵帅
Original assignee: Jiangsu Yuyue Medical Equipment and Supply Co Ltd; Jiangsu Yuyue Information System Co Ltd; Nanjing Yuyue Software Technology Co Ltd
Current assignee: Jiangsu Yuyue Medical Equipment and Supply Co Ltd; Jiangsu Yuyue Information System Co Ltd; Nanjing Yuyue Software Technology Co Ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2022-06-21
Anticipated expiration: 2031-12-20

Abstract

The utility model relates to the technical field of medical instruments, in particular to a pressure regulating valve. The utility model discloses a pressure regulating valve, which comprises a valve body, wherein an air inlet passage and a pressure regulating channel which are communicated through a communicating port are arranged in the valve body, the pressure regulating valve also comprises a pressure regulating valve rod, a pressure regulating spring and a pressure regulating valve head which are sequentially arranged along the pressure regulating channel, the pressure regulating valve rod is movably and hermetically connected to the opening end of the pressure regulating channel, a pressure regulating space is formed between the pressure regulating valve rod and the communicating port, the pressure regulating valve head can be stressed to overcome the elastic force of the pressure regulating spring, so that the communicating port is communicated with the pressure regulating space, the pressure regulating space is provided with a straight cylinder section, the side wall of the straight cylinder section is provided with an exhaust hole communicated with the outside, and the proportional relation between the aperture of the straight cylinder section and the aperture of the exhaust hole is 1: 0.8-1.2. It can reduce the turbulent flow of gas in the pressure regulating channel for gas can be discharged via the exhaust hole fast, thereby reduces the noise that the frictional vibration that gaseous turbulent flow caused produced.

Description

Pressure regulating valve

Technical Field

The utility model relates to the technical field of regulating valves, in particular to a pressure regulating valve.

Background

The pressure regulating valve is a type of regulating valve that regulates pressure by a spring and pressure of fluid. When the pressure regulating valve plays a role, fluid can flow through the pressure regulating channel of the valve body of the pressure regulating valve and is discharged through the exhaust hole of the pressure regulating channel, and because the flow rate of the fluid is high, the fluid can inevitably generate noise due to friction vibration in the pressure regulating channel when entering the valve body, and especially when the fluid is gas, the noise generated due to the friction vibration is more obvious, and the noise can generate obvious interference to a user using the pressure regulating valve. For example, the pressure of the mattress needs to be controlled by the pressure regulating valve, the pressure regulating valve is used for continuously using the anti-bedsore mattress as a product which is close to a user when the anti-bedsore mattress is used, and the noise generated by the pressure regulating valve on the anti-bedsore mattress can obviously influence the use experience of the user.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the conventional pressure regulating valve has obvious noise, the utility model provides the pressure regulating valve which can greatly reduce the generation of gas turbulence when gas enters a pressure regulating channel, so that the gas can be quickly discharged from an exhaust hole, and the noise generated by the friction vibration of the gas in the pressure regulating channel is greatly reduced.

In order to achieve the purpose, the utility model provides a pressure regulating valve, which comprises a valve body, wherein an air inlet passage and a pressure regulating passage which are communicated through a communicating hole are arranged inside the valve body, the air inlet passage and the pressure regulating passage both extend to the outer surface of the valve body and form an opening, the pressure regulating valve also comprises a pressure regulating valve rod, a pressure regulating spring and a pressure regulating valve head which are sequentially arranged along the pressure regulating passage, the pressure regulating valve rod is movably and hermetically connected with the opening end of the pressure regulating passage, a pressure regulating space is formed between the pressure regulating valve rod and the communicating hole, the pressure regulating spring and the pressure regulating valve head are arranged in the pressure regulating space, the communicating hole can be blocked by the pressure regulating valve head under the action of the elastic force of the pressure regulating spring, and the pressure regulating valve head can be stressed to overcome the elastic force of the pressure regulating spring so that the communicating hole is communicated with the pressure regulating space, the pressure regulating space is provided with a straight cylinder section, the side wall of the straight cylinder section is provided with an exhaust hole communicated with the outside, and the proportion relation between the aperture of the straight cylinder section and the aperture of the exhaust hole is 1: 0.8-1.2.

By arranging the straight cylinder section and the exhaust holes positioned on the side wall of the straight cylinder section, and enabling the proportion relation between the aperture of the straight cylinder section and the aperture of the exhaust holes to be 1:0.8-1.2, most of gas entering the straight cylinder section through the communication port can be directly exhausted from the exhaust holes relatively quickly, even if a small part of gas collides with the pressure regulating valve rod, the gas can be exhausted through the exhaust holes relatively quickly through steering, and even if the small part of gas collides with the pressure regulating valve rod, turbulent flow is generated, and noise generated by the small part of gas is relatively small. And the aperture of the vent hole is in the first pressure regulating channel and the valve body thickness under the condition of permission, the proportion relation between the aperture of the straight cylinder section and the aperture of the vent hole is 1:0.8-1.2, so that the aperture of the vent hole is relatively large, the contact area between the vent hole and the first pressure regulating channel is large, and the noise generated by the friction of the vent hole wall and the like due to the mutual impact of the gas at the vent hole is reduced.

In a preferred implementation manner of the pressure regulating valve, the pressure regulating spring in the pressure regulating channel is provided with a supporting section and a contact section which is in contact with the pressure regulating valve head, and an axis of the contact section and an axis of the supporting section form an inclined included angle. The contact section can promote the lateral wall of pressure regulating valve head butt pressure regulating passageway to reduce the noise that pressure regulating valve head self vibration produced.

In a preferred embodiment of the pressure regulating valve, the angle of inclination is in the range from 8 ° to 15 °. The influence of the large friction force between the pressure regulating valve head and the side wall of the pressure regulating channel on the sensitivity of the pressure regulating valve to pressure regulation can be avoided as much as possible.

In a preferred implementation manner of the pressure regulating valve, the pressure regulating spring forms a combined ring at the contact section, and the length of the combined ring is not less than 2 mm. The supporting force direction and the size of the pressure regulating valve head can be more stable by the contact section, and a better supporting anti-vibration effect is achieved.

In a preferred embodiment of the pressure regulating valve, the spring constant of the pressure regulating spring is not less than 4N/mm. The number of the coils of the pressure regulating spring can be reduced as much as possible, so that the contact area of the airflow and the pressure regulating spring is reduced, and the noise generated by friction or vibration of the airflow and the pressure regulating spring is reduced.

In a preferred implementation manner of the pressure regulating valve, the valve body is provided with a pair of pressure regulating channels which are respectively communicated with the air inlet channel and are respectively a first pressure regulating channel and a second pressure regulating channel, and the elastic coefficient of the pressure regulating spring in the second pressure regulating channel is greater than that of the pressure regulating spring in the first pressure regulating channel. The noise of the pressure regulating valve can be reduced as much as possible on the premise that the two pressure regulating channels respectively realize the functions.

In a preferred embodiment of the pressure regulating valve, the spring constant of the pressure regulating spring in the second pressure regulating channel is greater than 4N/mm. The pressure regulating spring can stably complete the function of the second pressure regulating channel and can reduce the noise in the second pressure regulating channel.

In a preferred implementation manner of the pressure regulating valve, the pressure regulating spring in the first pressure regulating channel is provided with a contact section with the pressure regulating valve head, and an inclined included angle is formed between the axis of the contact section and the axial direction of the pressure regulating channel. The first pressure regulating channel can also reduce the generation of noise as much as possible while sensitively completing the function.

In a preferred implementation manner of the pressure regulating valve, the pressure regulating valve comprises a pair of pressure regulating valve rods, the pair of pressure regulating valve rods are respectively in threaded connection with the first pressure regulating channel and the second pressure regulating channel, and a straight groove is formed in the top ends of the pair of pressure regulating valve rods. The pair of pressure regulating valve rods are adjusted through the straight grooves, so that the adjusting steps can be simplified, and the structural strength of the pressure regulating valve rods is high.

In a preferred implementation of the pressure regulating valve, the pressure regulating valve stem is in threaded connection with the open end of the pressure regulating channel, and the pressure regulating valve stem can be operated to adjust the position in the pressure regulating channel. Threaded connection can play better connection seal effect, and it can be more accurate that it can make the regulation of pressure regulating valve rod.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic cross-sectional structural diagram of an embodiment of a pressure regulating valve provided in the present application.

FIG. 2 is an exploded view of one embodiment of a pressure regulating valve provided herein.

Description of reference numerals:

100 pressure regulating valve;

the valve body 20, the air inlet passage 21, the pressure regulating passage 22, the straight cylinder section 221, the opening end 222, the exhaust hole 23 and the communication port 24;

30 pressure regulating valve rods and 31 straight grooves;

40 pressure regulating springs, 41 contact sections, 42 inclined included angles and 43 supporting sections;

50 pressure regulating valve heads;

61 first voltage regulation channel, 62 second voltage regulation channel.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "axial", "radial", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Descriptions in this specification as relating to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to any indicated technical feature or quantity. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Fig. 1 is a schematic sectional view of an embodiment of a pressure regulating valve 100, and fig. 2 is an exploded view of the pressure regulating valve 100 shown in fig. 1, wherein the pressure regulating valve 100 includes a valve body 20, and an air inlet passage 21 and a pressure regulating passage 22 are disposed inside the valve body 20 and communicate with each other. As shown in fig. 1, one end of the air inlet duct 21 extends to the outer surface of the valve body 20 to form an opening for connecting an object to be pressure-regulated (such as a bedsore-proof mattress, etc., which will be described later by way of example); the pressure regulating valve 100 shown in fig. 1 has two pressure regulating passages, a first pressure regulating passage 61 and a second pressure regulating passage 62, each extending to an outer surface of the valve body 20 to form an open end 222.

Taking the first pressure regulating channel 61 on the left side in fig. 1 as an example, the pressure regulating valve 100 further includes a pressure regulating valve head 50, a pressure regulating spring 40 and a pressure regulating valve rod 30 which are sequentially installed in the first pressure regulating channel 61 through the opening end 222, wherein the pressure regulating valve rod 30 is movably connected to the opening end 222, a pressure regulating space is formed between the pressure regulating valve rod 30 connected to the opening end 222 and the communication port 24, the pressure regulating spring 40 and the pressure regulating valve head 50 are disposed in the pressure regulating space, the pressure regulating spring 40 is compressed between the pressure regulating valve rod 30 and the pressure regulating valve head 50 to store an elastic potential energy, and the elastic potential energy can push the pressure regulating valve head 50 to move downwards to seal the communication port 24 between the intake air passage 21 and the pressure regulating channel 22.

Continuing to use first pressure regulating passageway 61 in fig. 1 as an example, the pressure regulating space in first pressure regulating passageway 61 has straight section of thick bamboo 221, the outside exhaust hole 23 of intercommunication is seted up to the lateral wall of straight section of thick bamboo 221, when the mattress internal pressure is great, the pressure in air inlet duct 21 is great, the thrust of pressure regulating spring 40 to pressure regulating valve head 50 can be overcome to this pressure, thereby open intercommunication mouth 24 and get into the pressure regulating space, because pressure regulating spring 40's characteristic, pressure regulating spring 40 still can form certain space between pressure regulating valve rod 30 and pressure regulating valve head 50 when compressed. The gas in the mattress can get into the pressure regulating space through intercommunication mouth 24, and at this moment, partly gaseous can be under the direction of pressure regulating valve head 50 lateral wall directly discharge via exhaust hole 23 smoothly, and another part gaseous can be followed the pressure regulating space lateral wall and get into the space between pressure regulating valve rod 30 and pressure regulating valve head 50 and strike pressure regulating valve rod 30 and then discharge via exhaust hole 23.

Because the gas pressure in the air inlet passage 21 is higher, the flow velocity of the gas is higher when the gas enters the pressure regulating space through the communicating port 24, the turbulent flow phenomenon is easily generated in the pressure regulating space, particularly the turbulent flow is obvious after the gas collides with the pressure regulating valve rod 30, and the air flow after the turbulent flow generates friction vibration with the inner wall of the first pressure regulating passage 61 and the exhaust hole 23 when the air flow is exhausted through the exhaust hole 23, so that the obvious noise is generated. By arranging the straight cylinder section 221 and the exhaust holes 23 on the side wall of the straight cylinder section 221, and enabling the proportion relation between the aperture of the straight cylinder section 221 and the aperture of the exhaust holes 23 to be 1:0.8-1.2, most of gas entering the straight cylinder section 221 through the communication port 24 can be rapidly exhausted from the exhaust holes 23, even if a small part of gas impacts the pressure regulating valve rod 30, the gas can be rapidly exhausted through the exhaust holes 23 through turning, and even if the small part of gas impacts the pressure regulating valve rod, the noise generated by turbulent flow generated by the small part of gas is relatively small. And the aperture of the vent hole 23 is 1:0.8-1.2 under the condition that the thickness of the first pressure regulating channel 61 and the valve body 20 allows, the proportion relation between the aperture of the straight cylinder section 221 and the aperture of the vent hole 23 is realized, the aperture of the vent hole 23 is relatively large, the noise generated by the mutual collision of the gas at the vent hole 23 and the friction of the vent hole wall is reduced, and the contact area between the vent hole 23 and the first pressure regulating channel 61 is large, so that the gas in the first pressure regulating channel 61 is rapidly discharged from the vent hole 23, and the gas can be rapidly discharged from the vent hole 23 even if turbulence is generated.

The drawings in the present application provide an integrated pressure regulating valve 100, for example, as shown in fig. 1, the first pressure regulating channel 61 and the second pressure regulating channel 62 are both provided with the exhaust hole 23, and the exhaust hole 23 and the straight cylinder section of each pressure regulating channel have the proportional relationship described above, as can be understood by those skilled in the art, the proportional relationship between the diameter of the exhaust hole 23 and the diameter of the straight cylinder section 221 of each pressure regulating channel can be applied to a non-integrated pressure regulating valve, for example, the first pressure regulating channel 61 in fig. 1 can be an independent pressure regulating valve capable of achieving noise reduction and pressure regulation, therefore, as long as the diameter of the exhaust hole and the diameter of the straight cylinder section of each pressure regulating channel adopt the pressure regulating valves of the embodiments within the scope of the claims in the present application, all of the present application are within the protection scope.

The pressure regulating spring 40 has a supporting section 43 and a contact section 41, and the axis of the contact section 41 has an inclined included angle 42 with the axial direction of the supporting section 43. When gas pressure surpassed pressure regulating spring 40's thrust in air intake duct 21, gaseous promotion pressure regulating valve head 50 opens intercommunication mouth 24, gaseous can follow the lateral wall of pressure regulating valve head 50 and the first pressure regulating passageway 61 within the clearance entering first pressure regulating passageway 61 within a definite time, because the unstable factor of gas pressure in the uneven and air cushion of the 50 lateral wall circumference gas flow rate of pressure regulating valve head, and the spring can produce comparatively obvious vibration at gas pressure not simultaneously, above factor has caused gaseous promotion pressure regulating valve head 50 time jointly, pressure regulating valve head 50 can vibrate in first pressure regulating passageway 61, pressure regulating valve head 50 self vibration and the first pressure regulating passageway 61 lateral wall of striking all can produce comparatively obvious noise. Can continue to refer to fig. 1, continue to use first pressure regulating passageway 61 as an example, pressure regulating spring 40 in first pressure regulating passageway 61 has the contact section 41 with the contact of pressure regulating valve head 50, can refer to fig. 2 simultaneously, therefore, through the contact section 41 that inclines to set up on pressure regulating spring 40, the contact section 41 of accessible slope makes pressure regulating valve head 50 hug closely the lateral wall of first pressure regulating passageway 61, thereby pressure regulating valve head 50 can be the lateral wall of the first pressure regulating passageway 61 of butt all the time when removing, the vibration of pressure regulating valve head 50 has been reduced to a certain extent, and then the noise that produces because pressure regulating valve head 50 vibration has been reduced.

The contact section 41 of the pressure regulating spring 40 is further optimized in that the inclined included angle 42 between the axis of the contact section 41 and the axial direction of the first pressure regulating channel 61 is in a range of 8 degrees to 15 degrees, see fig. 2, the force of the contact section 41 pushing the pressure regulating valve head 50 can be further decomposed into vertical downward force and horizontal force, the vertical downward force enables the pressure regulating valve head 50 to block the communication port 24, the horizontal force enables the pressure regulating valve head 50 to abut against the side wall of the first pressure regulating channel 61, by controlling the range of the inclined included angle 42, the force of the contact section 41 in the horizontal direction can be controlled to be small, that is, the pressure regulating valve head 50 can abut against the side wall of the first pressure regulating channel 61, and therefore, the influence on the pressure regulating effect caused by too large friction between the pressure regulating valve head 50 and the side wall of the first pressure regulating channel 61 can be avoided.

Another optimization of the contact section 41 of the pressure regulating spring 40 is that the contact section 41 of the pressure regulating spring 40 forms a parallel loop, and the length of the parallel loop is not less than 2 mm. The spring parallel ring does not have the clearance so that make the many rings of spring can and be in the same place between the many rings of spring, can see the embodiment of contact segment 41 in fig. 2, contact segment 41 forms the parallel ring and can play comparatively stable supporting role, length through setting up the parallel ring is not less than 2mm, the parallel ring can play better conduction effect, the size and the direction of the power of parallel ring transmission are all comparatively stable, be favorable to continuously and stably with pressure regulating valve head 50 butt in first pressure regulating passageway 61 inner wall, thereby reduce the noise that pressure regulating valve head 50 vibration brought.

The pressure regulating spring 40 is provided with the contact section 41 in contact with the pressure regulating valve head 50, the mode is easy to manufacture for the spring, the manufacture process of the contact section 41 is stable, meanwhile, the requirement of mass production of the pressure regulating spring 40 can be met, the supporting effect of the contact section 41 is good and stable, and the requirement of long-term use can be met.

In an alternative embodiment of the pressure regulating valve 100, the spring constant of the pressure regulating spring 40 may not be less than 4N/mm. On the premise that the length and diameter of the pressure regulating spring 40 are not changed, the larger the elastic coefficient of the pressure regulating spring 40 is, the smaller the number of coils of the pressure regulating spring 40 is, and the gas inevitably passes through the surface of the pressure regulating spring 40 on the path through which the gas passes through the pressure regulating passage 22 and is discharged from the gas discharge hole 23, so that vibration of the pressure regulating spring 40 itself caused by the flow of the gas and friction generated when the gas flows through the surface of the pressure regulating spring 40 cause certain noises. Referring to fig. 1 and 2, the elastic coefficient of the pressure regulating spring 40 in the first pressure regulating channel 61 in fig. 1 may be 4N/mm, and the elastic coefficient of the pressure regulating spring 40 in the second pressure regulating channel 62 may be greater than 4N/mm, and it can be seen that the elastic coefficient of the pressure regulating spring 40 is not less than 4N/mm, so that the number of turns of the pressure regulating spring 40 under the action of required supporting force is as small as possible, and thus the surface area of the pressure regulating spring 40 in the pressure regulating channel 22 is reduced, thereby reducing the noise generated by friction and impact between the gas and the pressure regulating spring 40 during flowing.

It is understood that the spring constant of the pressure regulating spring 40 is not less than 4N/mm, and may be applied not only to the integrated pressure regulating valve 100 shown in fig. 1, but also to other pressure regulating valves 100 having a pressure regulating function.

In the embodiment shown in fig. 1, fig. 1 shows a schematic cross-sectional view of an integrated pressure regulating valve 100, and the valve body 20 has a pair of pressure regulating passages 22, a first pressure regulating passage 61 and a second pressure regulating passage 62, which are respectively communicated with the intake air passage 21. The second pressure regulating channel 62 can play a role in pre-regulating pressure, and the pressure regulating valve rod 30 in the second pressure regulating channel 62 is not changed after being regulated to a proper position, so that the gas pressure in the air inlet passage 21, which is received when the pressure regulating valve head 50 and the pressure regulating spring 40 in the second pressure regulating channel 62 are changed, is also constant; the first pressure regulating passage 61 may control the differential pressure of the pressure regulating valve head 50 against the gas in the intake air passage 21 by controlling the movement of the pressure regulating valve stem 30 within the first pressure regulating passage 61.

The elastic coefficient of the pressure regulating spring 40 in the second pressure regulating channel 62 can be set to be larger, and it can be understood that the pressure regulating spring 40 in the second pressure regulating channel 62 can be larger due to the larger elastic coefficient, so the pressure regulating spring 40 in the second pressure regulating channel 62 can be stably abutted against the pressure regulating valve head 50 to resist the impact force generated by the high-pressure gas in the air inlet channel 21, and the pressure regulating valve head 50 can keep a better stabilizing effect. And the elastic coefficient of the pressure regulating spring 40 in the second pressure regulating channel 62 is large, the pressure regulating spring 40 can generate large counterforce to gas pressure by small elastic deformation, therefore, the pressure regulating valve head 50 in the second pressure regulating channel 62 can not generate obvious displacement, as long as it can open the communication port 24 of the second pressure regulating channel 62 and the air inlet channel 21 to make gas pass through, so that the elastic coefficient of the pressure regulating spring 40 in the second pressure regulating channel 62 is large, the number of coils of the pressure regulating spring 40 is small, noise caused by gas contacting the pressure regulating spring 40 is reduced, and the pressure regulating valve head 50 can be stably supported to make the pressure regulating valve head 50 reduce vibration, thereby reducing noise.

Compare the elastic coefficient of pressure regulating spring 40 in second pressure regulating passageway 62, the elastic coefficient of pressure regulating spring 40 in first pressure regulating passageway 61 can set up to be less, because pressure regulating spring 40 and pressure regulating valve head 50 in first pressure regulating passageway 61 need carry out comparatively sensitive control to the gas pressure in air intake duct 21, consequently pressure regulating spring 40 can set up less elastic coefficient and guarantee that pressure regulating spring 40's deformability can follow the change when the gas pressure changes in air intake duct 21, and then the degree that control pressure regulating valve head 50 will communicate the mouth 24 and open, thereby the speed of losing air of gas in the control air intake duct 21.

Therefore, in the integrated pressure regulating valve 100 shown in fig. 1, under the condition that the diameters of the exhaust holes 23 of the first pressure regulating channel 61 and the second pressure regulating channel 62 and the diameters of the corresponding straight cylinder sections 221 keep good noise reduction ratios, the elastic coefficient of the pressure regulating spring 40 in the second pressure regulating channel 62 is greater than that of the pressure regulating spring 40 in the first pressure regulating channel 61, so that the first pressure regulating channel 61 can fulfill the requirement of sensitively controlling the air pressure in the air cushion under the condition that the noise in the second pressure regulating channel 62 is reduced as much as possible.

In a preferred embodiment, the spring constant of the pressure regulating spring 40 in the second pressure regulating passage 62 may be greater than 4N/mm, and the spring constant of the pressure regulating spring 40 in the first pressure regulating passage 61 may be selected to be 4N/mm.

The further optimization of the first pressure regulating channel 61 in the integrated pressure regulating valve 100 is that the pressure regulating spring 40 in the first pressure regulating channel 61 has a contact section 41 in contact with the pressure regulating valve head 50, and the axial line of the contact section 41 and the axial direction of the pressure regulating channel 22 have an inclined included angle 42, so that the noise reduction can be performed on the vibration of the pressure regulating valve head 50 in the first pressure regulating channel 61, and both the first pressure regulating channel 61 and the second pressure regulating channel 62 of the integrated pressure regulating valve 100 can perform noise reduction, so that the noise of the integrated pressure regulating valve 100 in the operation process is low, and the improvement of user experience is facilitated.

Regarding the way that the pressure regulating valve rod 30 is movably and hermetically connected with the open end 222 of the pressure regulating channel 22, in a specific embodiment, as shown in fig. 1, the pressure regulating valve rod 30 is screwed into the open end 222 of the pressure regulating channel 22, the screwed connection has good air tightness, so that the pressure regulating valve rod 30 can seal the open end 222 of the pressure regulating channel 22, gas can be discharged through the exhaust hole 23, and noise caused by the outflow of the gas through a gap between the pressure regulating valve rod 30 and the pressure regulating channel 22 can be avoided. And the threaded connection can adjust the position in the pressure regulating channel 22 under the operation of the knob, refer to the pressure regulating valve rod 30 in fig. 1, the pressure regulating valve rod 30 can move downwards or upwards through the knob pressure regulating valve rod 30, so as to increase or reduce the elastic potential energy of the pressure regulating spring 40, and the threaded connection can make the up-and-down movement of the pressure regulating valve rod 30 more accurate, so as to control the gas pressure of the air cushion more accurately.

With continued reference to fig. 1, in the integrated pressure regulating valve 100, the valve body 20 includes a pair of pressure regulating valve rods 30, the pair of pressure regulating valve rods 30 are respectively screwed to the first pressure regulating passage 61 and the second pressure regulating passage 62, and the top ends of the pair of pressure regulating valve rods 30 are respectively opened with a straight groove 31. Therefore, the pair of pressure regulating drop rods can be regulated through the straight groove 31, only one tool is used for regulating, the regulation is convenient, the complex operation during the regulation is reduced, the debugging time during the production and the maintenance is reduced, and the time cost is saved. And the wall thickness of the adjusting position of the pressure regulating valve rod 30 is increased through the straight groove 31, so that the structural strength is increased, the phenomena of tooth slipping and the like are not easy to generate in adjustment, and the adjustment is stable.

The technical solutions protected by the present invention are not limited to the above embodiments, and it should be noted that the combination of the technical solution of any one embodiment and the technical solution of one or more other embodiments is within the protection scope of the present invention. Although the utility model has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.

Claims

1. The pressure regulating valve is characterized by comprising a valve body, wherein an air inlet passage and a pressure regulating passage which are communicated through a communicating port are arranged inside the valve body, the air inlet passage and the pressure regulating passage all extend to the outer surface of the valve body and form an opening, the pressure regulating valve further comprises a pressure regulating valve rod, a pressure regulating spring and a pressure regulating valve head which are sequentially arranged along the pressure regulating passage, the pressure regulating valve rod is movably and hermetically connected to the open end of the pressure regulating passage, a pressure regulating space is formed between the pressure regulating valve rod and the communicating port, the pressure regulating spring and the pressure regulating valve head are arranged in the pressure regulating space, the communicating port can be plugged by the pressure regulating valve head under the elastic force of the pressure regulating spring, the pressure regulating valve head can be stressed to overcome the elastic force of the pressure regulating spring, the communicating port is communicated with the pressure regulating space, and the pressure regulating space is provided with a straight barrel section, the side wall of the straight cylinder section is provided with an exhaust hole communicated with the outside, and the proportion relation between the aperture of the straight cylinder section and the aperture of the exhaust hole is 1: 0.8-1.2.

2. The pressure regulating valve according to claim 1, wherein said pressure regulating spring in said pressure regulating passage has a supporting section and a contact section in contact with said pressure regulating valve head, and the axis of said contact section has an inclined angle with the axis of said supporting section.

3. A pressure regulating valve according to claim 2 wherein said included angle of inclination is in the range 8 ° -15 °.

4. The pressure regulating valve according to claim 2, wherein said pressure regulating spring forms a parallel loop at said contact section, and the length of said parallel loop is not less than 2 mm.

5. The pressure regulating valve according to claim 1, wherein said pressure regulating spring has a spring constant of not less than 4N/mm.

6. The pressure regulating valve according to claim 1, wherein said valve body has a pair of said pressure regulating passages communicating with said intake air passage, respectively, a first pressure regulating passage and a second pressure regulating passage, and an elastic coefficient of said pressure regulating spring in said second pressure regulating passage is larger than an elastic coefficient of said pressure regulating spring in said first pressure regulating passage.

7. The pressure regulating valve according to claim 6, wherein the spring constant of said pressure regulating spring in said second pressure regulating passage is greater than 4N/mm.

8. The pressure regulating valve according to claim 6, wherein said pressure regulating spring in said first pressure regulating passage has a contact section with said pressure regulating valve head, and the axis of said contact section has an inclined angle with the axial direction of said pressure regulating passage.

9. The pressure regulating valve according to claim 6, wherein said pressure regulating valve includes a pair of pressure regulating valve rods, said pair of pressure regulating valve rods are respectively screwed to said first pressure regulating passage and said second pressure regulating passage, and a straight groove is formed at the top end of each of said pair of pressure regulating valve rods.

10. The pressure regulating valve according to claim 1, wherein said pressure regulating valve stem is threadedly connected to an open end of said pressure regulating passage, and said pressure regulating valve stem is operable to adjust a position within said pressure regulating passage.