CN216789237U - Pressure regulating valve - Google Patents

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 technique

The pressure regulating valve is a regulating valve that adjusts the pressure through the pressure of the spring and the fluid. When the pressure regulating valve is functioning, the fluid will flow through the pressure regulating channel of the pressure regulating valve body and be discharged through the exhaust hole of the pressure regulating channel. The frictional vibration in the channel generates noise, especially when the fluid is gas, the noise due to frictional vibration is more obvious, and the noise will cause significant disturbance to the users of the pressure regulating valve. For example, the anti-decubitus mattress needs to control the air pressure of the mattress through the pressure regulating valve. The anti-decubitus mattress is a product that is used continuously by the user and is close to the user, and the noise generated by the pressure regulating valve on the mattress will obviously affect the user. user experience.

Utility model content

In order to solve the above-mentioned problem of obvious noise of the existing pressure regulating valve, the present invention provides a pressure regulating valve, which can greatly reduce the gas turbulence when the gas enters the pressure regulating channel, so that the gas can be quickly removed from the pressure regulating valve. The exhaust hole is exhausted, so the noise generated by the frictional vibration of the gas in the pressure regulating channel is greatly reduced.

In order to achieve the above purpose, the present invention provides a pressure regulating valve, which includes a valve body, and the inside of the valve body is provided with an intake air passage and a pressure regulating passage which are communicated through a communication port. The pressure regulating passages all extend to the outer surface of the valve body and form an opening, and the pressure regulating valve further comprises a pressure regulating valve stem, a pressure regulating spring and a pressure regulating valve head which are sequentially arranged along the pressure regulating passage. The pressure regulating valve stem is movably connected to the open end of the pressure regulating channel, a pressure regulating space is formed between the pressure regulating valve stem and the communication port, and the pressure regulating spring and the pressure regulating valve head are arranged In the pressure regulating space, the pressure regulating valve head can block the communication port under the action of the elastic force of the pressure regulating spring, and the pressure regulating valve head can be forced to overcome the force of the pressure regulating spring. The elastic force makes the communication port communicate with the pressure regulating space, the pressure regulating space has a straight cylinder section, the side wall of the straight cylinder section is provided with an exhaust hole that communicates with the outside world, and the hole diameter of the straight cylinder section is connected to the exhaust gas. The ratio between the pore diameters of the pores is 1:0.8-1.2.

By arranging the straight cylinder section and the exhaust hole located on the side wall of the straight cylinder section, and making the ratio between the diameter of the straight cylinder section and the diameter of the exhaust hole to be 1:0.8-1.2, it is possible to make most of the straight cylinder section enter through the communication port. The gas can be discharged directly from the exhaust hole relatively quickly, even if a small part of the gas hits the pressure regulating valve stem, it can be discharged through the exhaust hole relatively quickly after turning, even if the small part of the gas hits the pressure regulating valve stem and produces turbulent flow. The noise produced is also relatively small. And the diameter of the exhaust hole is allowed by the thickness of the first pressure regulating channel and the valve body, and the ratio between the diameter of the straight cylinder section and the diameter of the exhaust hole is 1:0.8-1.2, which can make the diameter of the exhaust hole. It is relatively large, so the contact area between the exhaust hole and the first pressure regulating channel is larger, which reduces the noise generated by the gas colliding with each other at the exhaust hole and rubbing the wall of the exhaust hole.

In a preferred implementation of the pressure regulating valve, the pressure regulating spring in the pressure regulating channel has a support section and a contact section that contacts the pressure regulating valve head, and the axis of the contact section is connected to the support section. The axes of the segments have an oblique angle. The contact section can push the pressure regulating valve head to abut against the side wall of the pressure regulating channel, thereby reducing the noise generated by the vibration of the pressure regulating valve head itself.

In a preferred implementation manner of the pressure regulating valve, the inclination angle ranges from 8° to 15°. It can be avoided as far as possible that the friction between the pressure regulating valve head and the side wall of the pressure regulating channel is too large to affect the sensitivity of the pressure regulating valve to pressure regulation.

In a preferred implementation manner of the pressure regulating valve, the pressure regulating spring forms a coil in the contact section, and the length of the coil is not less than 2 mm. It can make the direction and size of the supporting force of the contact section to the pressure regulating valve head more stable, and play a better supporting and anti-vibration effect.

In a preferred implementation manner of the pressure regulating valve, the elastic coefficient of the pressure regulating spring is not less than 4N/mm. The number of coils of the pressure regulating spring can be reduced as much as possible, thereby reducing the contact area between the air flow and the pressure regulating spring, thereby reducing the noise caused by the friction or vibration of the air flow and the pressure regulating spring.

In a preferred implementation manner of the pressure regulating valve, the valve body has a pair of the pressure regulating passages which are respectively communicated with the intake air passages, which are a first pressure regulating passage and a second pressure regulating passage, respectively. 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 can realize their functions respectively.

In a preferred implementation manner of the pressure regulating valve, the elastic coefficient of the pressure regulating spring in the second pressure regulating channel is greater than 4 N/mm. The pressure regulating spring can stably perform the function of the second pressure regulating channel and reduce the noise in the second pressure regulating channel.

In a preferred implementation of the pressure regulating valve, the pressure regulating spring in the first pressure regulating channel has a contact section with the pressure regulating valve head, and the axis of the contact section is connected to the pressure regulating channel The axial direction has an inclined angle. The first pressure regulating channel can also perform its function more sensitively and reduce noise generation as much as possible.

In a preferred implementation manner of the pressure regulating valve, the pressure regulating valve includes a pair of pressure regulating valve stems, and a pair of the pressure regulating valve stems are respectively threadedly connected to the first pressure regulating channel and the second regulating valve. A pressure channel is provided at the top of a pair of the pressure regulating valve stems. Both the pair of pressure regulating valve stems are adjusted through a slot, which can simplify the adjustment steps, and make the pressure regulating valve stem stronger in structure.

In a preferred implementation manner of the pressure regulating valve, the pressure regulating valve stem is threadedly connected to the open end of the pressure regulating channel, and the pressure regulating valve stem can adjust the pressure regulating valve in the pressure regulating channel under operation. Location. The threaded connection can have a better connection sealing effect, which can make the adjustment of the pressure regulating valve stem more precise.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. . In the attached image:

FIG. 1 is a schematic cross-sectional structural diagram of an embodiment of the pressure regulating valve provided by the application.

FIG. 2 is an exploded view of an embodiment of the pressure regulating valve provided by the application.

Description of reference numbers:

100 pressure regulating valve;

20 valve body, 21 intake air passage, 22 pressure regulating passage, 221 straight cylinder section, 222 open end, 23 exhaust hole, 24 communication port;

30 pressure regulating valve stem, 31 slot;

40 pressure regulating spring, 41 contact section, 42 inclined angle, 43 support section;

50 pressure regulating valve head;

61 first pressure regulating channel, 62 second pressure regulating channel.

Detailed ways

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

It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described here. Therefore, the protection scope of the present utility model does not Not to be limited by the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "axial" ", "radial" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have The particular orientation, construction and operation in the particular orientation are therefore not to be construed as limitations of the present invention.

In the present invention, descriptions such as "first", "second", etc. are only used for description purposes, and should not be understood as indicating or implying their relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature.

1 is a schematic cross-sectional view of an embodiment of the pressure regulating valve 100, and FIG. 2 is an exploded view of the structure of the pressure regulating valve 100 provided in FIG. 1, wherein the pressure regulating valve 100 includes a valve body 20, and the valve body 20 is internally provided There are intake air passages 21 and pressure regulating passages 22 that communicate with each other. As shown in FIG. 1 , one end of the intake air passage 21 extends to the outer surface of the valve body 20 to form an opening, and the opening is used to connect the object to be pressure-regulated (such as an anti-decubitus mattress, etc., which will be described in the following by taking a mattress as an example). ); the pressure regulating valve 100 shown in FIG. 1 has two pressure regulating channels, a first pressure regulating channel 61 and a second pressure regulating channel 62, and each pressure regulating channel extends to the 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 which are sequentially inserted into the first pressure regulating channel 61 through the open end 222 . The rod 30, wherein the pressure regulating valve rod 30 is movably connected to the open end 222, and a pressure regulating space is formed between the pressure regulating valve rod 30 connected to the open end 222 and the communication port 24, the pressure regulating spring 40 and the pressure regulating valve The head 50 is arranged in the pressure regulating space, and the pressure regulating spring 40 is compressed between the pressure regulating valve stem 30 and the pressure regulating valve head 50 to be able to store an elastic potential energy, which can push the pressure regulating valve head 50 to move downward to The communication port 24 between the intake air passage 21 and the pressure regulating passage 22 is blocked.

Continuing to take the first pressure regulating channel 61 in FIG. 1 as an example, the pressure regulating space in the first pressure regulating channel 61 has a straight cylinder section 221, and the side wall of the straight cylinder section 221 is provided with an exhaust hole 23 that communicates with the outside world. When the internal pressure is high, the pressure in the intake air passage 21 is high, which can overcome the thrust of the pressure regulating spring 40 on the pressure regulating valve head 50, thereby opening the communication port 24 and entering the pressure regulating space. 40, when the pressure regulating spring 40 is compressed, a certain space will still be formed between the pressure regulating valve stem 30 and the pressure regulating valve head 50. The air in the mattress can enter the pressure regulating space through the communication port 24. At this time, a part of the air can be smoothly discharged directly through the exhaust hole 23 under the guidance of the outer wall of the pressure regulating valve head 50, and the other part of the air will flow along the pressure regulating space. The side wall enters the space between the pressure regulating valve stem 30 and the pressure regulating valve head 50 and hits the pressure regulating valve stem 30 before being discharged through the exhaust hole 23 .

Due to the high gas pressure in the intake air passage 21 , the gas flows faster when entering the pressure regulating space through the communication port 24 , and turbulence is easily generated in the pressure regulating space, especially after colliding with the pressure regulating valve stem 30 . The turbulent flow is obvious. When the turbulent airflow is discharged through the exhaust hole 23, it generates relatively obvious noise due to frictional vibration with the inner wall of the first pressure regulating channel 61 and the exhaust hole 23. By arranging the straight cylinder section 221 and the exhaust hole 23 located on the side wall of the straight cylinder section 221 , and making the ratio between the diameter of the straight cylinder section 221 and the diameter of the exhaust hole 23 to be 1:0.8-1.2, it is possible to make the entry through the communication port 24 Most of the gas in the straight cylinder section 221 can be discharged from the exhaust hole 23 relatively quickly, even if the small part of the gas hits the pressure regulating valve stem 30 and turns around, it can be discharged through the exhaust hole 23 relatively quickly, even if a small part of the gas hits the pressure regulating valve stem 30. The noise generated by the turbulent flow after the pressure regulating valve stem is also relatively small. And the diameter of the exhaust hole 23 is allowed by the thickness of the first pressure regulating channel 61 and the valve body 20, so that the ratio between the diameter of the straight cylinder section 221 and the diameter of the exhaust hole 23 is 1:0.8-1.2, which can make The diameter of the exhaust hole 23 is relatively large, which reduces the noise generated by the gas colliding with each other at the exhaust hole 23 and rubbing the wall of the exhaust hole, and the contact area between the exhaust hole 23 and the first pressure regulating channel 61 is relatively large, Therefore, the gas in the first pressure regulating channel 61 can be quickly discharged from the exhaust hole 23, and even if turbulent flow occurs, the gas can be quickly discharged from the exhaust hole 23.

An integrated pressure regulating valve 100 is provided in the accompanying drawings of this application. For example, as shown in FIG. 1 , the first pressure regulating channel 61 and the second pressure regulating channel 62 are both provided with exhaust holes 23 , and the exhaust holes 23 are connected to each pressure regulating valve. The straight section of the channel has the aforementioned proportional relationship. Those skilled in the art can understand that the proportional relationship between the diameter of the exhaust hole 23 and the diameter of the straight section 221 of the pressure regulating channel can be applied to a non-integrated pressure regulating valve, such as the one shown in FIG. 1 . A pressure regulating channel 61 can be an independent pressure regulating valve that can realize the function of noise reduction and pressure regulation. Therefore, as long as the diameter of the exhaust hole and the diameter of the straight cylinder section of the pressure regulating channel adopt the pressure regulation of the embodiments within the scope of the claims of the present application Valves are all within the scope of protection of this application.

The pressure regulating spring 40 has a support segment 43 and a contact segment 41 , and the axis of the contact segment 41 and the axis direction of the support segment 43 have an inclined angle 42 . When the gas pressure in the intake air passage 21 exceeds the thrust of the pressure regulating spring 40, the gas pushes the pressure regulating valve head 50 to open the communication port 24, and the gas can move along the gap between the side wall of the pressure regulating valve head 50 and the first pressure regulating passage 61 Entering into the first pressure regulating channel 61, due to the uneven gas flow rate in the circumferential direction of the side wall of the pressure regulating valve head 50 and the unstable gas pressure in the air cushion, and the spring will produce relatively obvious vibration when the gas pressure is different, the above factors are common. When the gas pushes the pressure regulating valve head 50 , the pressure regulating valve head 50 will vibrate in the first pressure regulating channel 61 , and the vibration of the pressure regulating valve head 50 itself and the impact on the side wall of the first pressure regulating channel 61 will cause obvious vibrations. noise. 1, continue to take the first pressure regulating channel 61 as an example, 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 can also refer to FIG. 2, therefore, Through the inclined contact section 41 on the pressure regulating spring 40, the pressure regulating valve head 50 can be made to abut against the side wall of the first pressure regulating channel 61 through the inclined contact section 41, so that the pressure regulating valve head 50 can always contact the pressure regulating valve head 50 when moving. Connecting to the side wall of the first pressure regulating channel 61 reduces the vibration of the pressure regulating valve head 50 to a certain extent, thereby reducing the noise generated by the vibration of the pressure regulating valve head 50 .

The further optimization of the contact section 41 of the pressure regulating spring 40 is that the inclination angle 42 between the axis of the contact section 41 and the axial direction of the first pressure regulating channel 61 ranges from 8° to 15°, as shown in FIG. 2 , The force of the contact section 41 pushing the pressure regulating valve head 50 can be further decomposed into a vertical downward force and a horizontal force, the vertical downward force enables the pressure regulating valve head 50 to block the communication port 24, and the horizontal direction force The force makes the drivable pressure regulating valve head 50 abut against the side wall of the first pressure regulating channel 61. By controlling the range of the inclined angle 42, the force of the controllable contact section 41 in the horizontal direction is small, that is, the pressure regulating valve head can be made to be smaller. The 50 only needs to be in contact with the side wall of the first pressure regulating channel 61 , so as to prevent the friction between the pressure regulating valve head 50 and the side wall of the first pressure regulating channel 61 from being too large and affecting the pressure regulating effect.

Another optimization for 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 coil, and the length of the parallel coil is not less than 2 mm. Coiled spring means that there is no gap between the multiple coils of the spring, so that the multiple coils of the spring can be combined together. Please refer to the embodiment of the contact segment 41 in FIG. , By setting the length of the parallel ring to be not less than 2mm, the parallel ring can play a better force transmission role, and the magnitude and direction of the force transmitted by the parallel ring are relatively stable, which is conducive to continuously and stably abutting the pressure regulating valve head 50 on the The inner wall of the first pressure regulating channel 61 can reduce the noise caused by the vibration of the pressure regulating valve head 50 .

The pressure regulating spring 40 is provided with a contact section 41 that is in contact with the pressure regulating valve head 50. This method is easy to manufacture for the spring, and the manufacturing process of the contact section 41 is stable, and at the same time, it can meet the needs of mass production of the pressure regulating spring 40. In addition, the supporting effect of the contact section 41 is better and more stable, and can meet the needs of long-term use.

In an optional embodiment of the pressure regulating valve 100 , the elastic coefficient of the pressure regulating spring 40 may not be less than 4 N/mm. On the premise that the length and diameter of the pressure regulating spring 40 remain unchanged, 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. On the discharge path, it will inevitably pass through the surface of the pressure regulating spring 40. Therefore, the vibration of the pressure regulating spring 40 caused by the flow of gas and the friction generated when the gas flows over the surface of the pressure regulating spring 40 will bring certain noise. . 1 and 2 at the same time, the elastic coefficient of the pressure regulating spring 40 in the first pressure regulating channel 61 in FIG. 1 may be 4 N/mm, and the elastic coefficient of the pressure regulating spring 40 in the second pressure regulating channel 62 may be greater than 4N/mm, it can be seen that the elastic coefficient of the pressure regulating spring 40 is not less than 4N/mm, which can make the number of coils of the pressure regulating spring 40 as small as possible under the action of the required supporting force, thus reducing the pressure regulation The surface area of the spring 40 in the pressure regulating channel 22 reduces the noise generated by the friction and impact between the gas and the pressure regulating spring 40 when flowing.

It can be understood that the elastic coefficient of the pressure regulating spring 40 is not less than 4 N/mm, which can 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 specific embodiment shown in FIG. 1 , FIG. 1 shows a schematic cross-sectional view of an integrated pressure regulating valve 100 , the valve body 20 has a pair of pressure regulating passages 22 respectively communicating with the intake air passages 21 , They are the first pressure regulating channel 61 and the second pressure regulating channel 62 respectively. Among them, the second pressure regulating channel 62 can play a role of pre-pressure regulation, and the pressure regulating valve stem 30 in the second pressure regulating channel 62 will not change after being adjusted to a proper position, so the pressure regulating in the second pressure regulating channel 62 When the valve head 50 and the pressure regulating spring 40 change, the gas pressure in the intake air passage 21 is also constant; the first pressure regulating passage 61 can control the movement of the pressure regulating valve stem 30 in the first pressure regulating passage 61 To control the pressure regulating valve head 50 to resist the different pressures of the gas in the intake air passage 21 .

The elastic coefficient of the pressure regulating spring 40 in the second pressure regulating channel 62 can be set to be relatively large. It is understandable that the pressure regulating spring 40 in the second pressure regulating channel 62 can have a relatively large stiffness due to its relatively large elastic coefficient. The pressure regulating spring 40 in the second pressure regulating passage 62 can abut the pressure regulating valve head 50 relatively stably to resist the impact force generated by the high pressure gas in the intake air passage 21 , so that the pressure regulating valve head 50 can maintain a good stabilizing effect. In addition, the elastic coefficient of the pressure regulating spring 40 in the second pressure regulating channel 62 is relatively large, and a relatively small elastic deformation of the pressure regulating spring 40 can generate a relatively large resistance force against the gas pressure. The pressure regulating valve head 50 may not have a relatively obvious displacement, as long as it can open the communication port 24 between the second pressure regulating channel 62 and the intake air channel 21 to allow the gas to pass through, so the second pressure regulating channel 62 The larger elastic coefficient of the pressure regulating spring 40 can reduce the number of coils of the pressure regulating spring 40 and reduce the noise caused by the gas contacting the pressure regulating spring 40, and can more stably support the pressure regulating valve head 50 so that the pressure regulating valve head 50 reduces vibration and thus reduces noise.

Compared with the elastic coefficient of the pressure regulating spring 40 in the second pressure regulating channel 62 , the spring coefficient of the pressure regulating spring 40 in the first pressure regulating channel 61 can be set to be smaller, because the pressure regulating in the first pressure regulating channel 61 The spring 40 and the pressure regulating valve head 50 need to control the gas pressure in the intake air passage 21 more sensitively. Therefore, the pressure regulating spring 40 can be set with a small elastic coefficient to ensure that the gas pressure in the intake air passage 21 can be adjusted when the gas pressure changes. The deformation of the compression spring 40 can follow the change, thereby controlling the degree to which the pressure regulating valve head 50 opens the communication port 24 , thereby controlling the deflation rate of the gas in the intake air passage 21 .

Therefore, in the integrated pressure regulating valve 100 shown in FIG. 1 , the diameter of the exhaust hole 23 of the first pressure regulating channel 61 and the second pressure regulating channel 62 and the diameter of the corresponding straight cylinder section 221 maintain a good noise reduction ratio. Therefore, 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, which can reduce the noise in the second pressure regulating channel 62 as much as possible. So that the first pressure regulating channel 61 can fulfill the requirement of sensitive control of the air pressure in the air cushion.

In a preferred embodiment, the elastic coefficient of the pressure regulating spring 40 in the second pressure regulating channel 62 can be greater than 4N/mm, and the elastic coefficient of the pressure regulating spring 40 in the first pressure regulating channel 61 can be selected as 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 which is in contact with the pressure regulating valve head 50 . The axis and the axial direction of the pressure regulating channel 22 have an inclined angle 42. Therefore, the vibration of the pressure regulating valve head 50 can be reduced in the first pressure regulating channel 61. Therefore, the first pressure regulating channel of the integrated pressure regulating valve 100 Both 61 and the second pressure regulating channel 62 can perform noise reduction, so that the integrated pressure regulating valve 100 has lower noise during operation, which is beneficial to improve user experience.

Regarding the manner in which the pressure regulating valve rod 30 is movably and sealingly connected to the open end 222 of the pressure regulating channel 22, in a specific embodiment, referring to FIG. The open end 222, the threaded connection has good air tightness, so that the pressure regulating valve stem 30 can close the open end 222 of the pressure regulating channel 22, so that the gas is discharged through the exhaust hole 23, which can prevent the gas from passing through the pressure regulating valve stem. The gap between 30 and the pressure regulating channel 22 flows out and causes noise. 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 stem 30 in FIG. Thus, the elastic potential energy of the pressure regulating spring 40 is increased or decreased, and the threaded connection can make the up and down movement of the pressure regulating valve stem 30 more precise, so as to control the gas pressure of the air cushion more accurately.

1 , in the integrated pressure regulating valve 100, the valve body 20 includes a pair of pressure regulating valve stems 30, and the pair of pressure regulating valve stems 30 are respectively screwed to the first pressure regulating channel 61 and the second pressure regulating channel 62, and the top of the pair of pressure regulating valve rods 30 is provided with a word groove 31. Therefore, a pair of pressure regulating drop bars can be adjusted through the slot 31, and only one tool can be used for adjustment, which is convenient for adjustment, reduces the tedious operation during adjustment, reduces the debugging time during production and maintenance, and saves money. Time costs. In addition, through the slot 31, the wall thickness of the adjustment position of the pressure regulating valve rod 30 is increased, which increases the structural strength, so the adjustment is not easy to produce slippage and other phenomena, and the adjustment is relatively stable.

The technical solutions protected by the present invention are not limited to the above-mentioned embodiments. It should be pointed out that the combination of the technical solutions in any one embodiment and the technical solutions in other one or more embodiments is within the protection scope of the present invention. Although the present utility model has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the present utility model, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention belong to the scope of protection of the present invention.

Claims (10)

1. A pressure regulating valve, characterized in that it comprises a valve body, and the inside of the valve body is provided with an intake air passage and a pressure regulating passage which are communicated through a communication port, and the intake air passage and the pressure regulating passage are both. Extending to the outer surface of the valve body and forming an opening, the pressure regulating valve further includes a pressure regulating valve stem, a pressure regulating spring and a pressure regulating valve head arranged in sequence along the pressure regulating passage, and the pressure regulating valve stem can be The movable seal is connected to the open end of the pressure regulating channel, a pressure regulating space is formed between the pressure regulating valve stem and the communication port, and the pressure regulating spring and the pressure regulating valve head are arranged in the pressure regulating valve. The pressure regulating valve head can block the communication port under the action of the elastic force of the pressure regulating spring, and the pressure regulating valve head can be forced to overcome the elastic force of the pressure regulating spring, so that all The communication port communicates with the pressure regulating space, the pressure regulating space has a straight cylinder section, the side wall of the straight cylinder section is provided with an exhaust hole that communicates with the outside world, and the diameter of the straight cylinder section is between the diameter of the exhaust hole and the diameter of the exhaust hole. The proportional relationship is 1:0.8-1.2. 2 . The pressure regulating valve according to claim 1 , wherein the pressure regulating spring in the pressure regulating passage has a support section and a contact section contacting with the pressure regulating valve head, and the contact section has a contact section. 3 . The axis has an inclined angle with the axis of the support section. 3 . The pressure regulating valve according to claim 2 , wherein the range of the inclined angle is 8°-15°. 4 . 4 . The pressure regulating valve according to claim 2 , wherein the pressure regulating spring forms a coil in the contact section, and the length of the coil is not less than 2 mm. 5 . 5 . The pressure regulating valve according to claim 1 , wherein the elastic coefficient of the pressure regulating spring is not less than 4N/mm. 6 . 6 . The pressure regulating valve according to claim 1 , wherein the valve body has a pair of the pressure regulating passages respectively communicating with the intake air passages, which are a first pressure regulating passage and a second pressure regulating passage respectively. 7 . A pressure channel, 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. 7 . The pressure regulating valve according to claim 6 , wherein the elastic coefficient of the pressure regulating spring in the second pressure regulating channel is greater than 4 N/mm. 8 . 8 . The pressure regulating valve according to claim 6 , wherein the pressure regulating spring in the first pressure regulating passage has a contact section with the pressure regulating valve head, and the axis of the contact section is the same as the The axial direction of the pressure regulating channel has an inclined angle. 9 . The pressure regulating valve according to claim 6 , wherein the pressure regulating valve comprises a pair of pressure regulating valve stems, and a pair of the pressure regulating valve stems are respectively threadedly connected to the first pressure regulating channel and the In the second pressure regulating channel, a pair of tops of the pressure regulating valve rods are both provided with a word groove. 10 . The pressure regulating valve according to claim 1 , wherein the pressure regulating valve stem is threadedly connected to the open end of the pressure regulating channel, and the pressure regulating valve stem can be adjusted to be located in the pressure regulating valve under operation. 11 . position within the regulator channel.

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