CN212643551U - Pressure regulating valve and pressure regulating system - Google Patents

Abstract

An embodiment of the utility model provides an air-vent valve and pressure governing system relates to pressure control equipment technical field. The embodiment of the utility model provides an air-vent valve includes valve body, case, first elastic component and driving piece. The valve body is provided with an inlet, an outlet and a channel for communicating the inlet and the outlet, and fluid entering the valve body from the inlet flows out through the channel and the outlet in sequence. The valve core is movably arranged in the valve body, so that the opening degree of the channel is adjusted through the movement of the valve core, the pressure of the fluid leaving from the outlet is adjusted, and the pressure adjusting function is realized. The driving piece is connected with the valve core through the first elastic piece, and the driving piece is used for driving the relative valve body motion of valve core through the first elastic piece, consequently when the valve core motion is driven to the driving piece in order to adjust the aperture of passageway, first elastic piece performance cushioning effect to make the pressure adjustment process more steady, and then improved the problem that pressure sudden change phenomenon appears in the pressure regulating process.

Description

Pressure regulating valve and pressure regulating system

Technical Field

The utility model relates to a pressure control equipment technical field particularly, relates to an air-vent valve and pressure regulation system.

Background

The pressure regulating valve is a commonly used flow regulating control device in a pressure regulating system, so that the pressure in the pressure regulating system can be regulated through the pressure regulating valve.

However, when the flow rate of the conventional pressure regulating valve is regulated, particularly when the gas flow rate is regulated, a pressure jump phenomenon often occurs, and the use is affected.

SUMMERY OF THE UTILITY MODEL

The object of the utility model includes, for example, provide an air-vent valve, it can improve the problem that pressure sudden change phenomenon appears in the pressure regulating in-process.

The utility model discloses an aim still includes, provides a pressure regulation system, and it can improve the problem that pressure sudden change phenomenon appears in the pressure regulating in-process.

The embodiment of the utility model discloses a can realize like this:

the embodiment of the utility model provides a pressure regulating valve, which comprises a valve body, a valve core, a first elastic part and a driving part; the valve body having an inlet, an outlet, and a passage communicating the inlet with the outlet; the valve core is movably arranged in the valve body so as to adjust the opening degree of the channel; the driving piece is connected with the valve core through the first elastic piece and is used for driving the valve core to move relative to the valve body through the first elastic piece.

Optionally, the valve core is provided with an adjusting part, the channel is provided with an orifice matched with the adjusting part, and a gap for communicating the inlet and the outlet is formed between the adjusting part and the orifice; the driving piece is used for driving the adjusting part to move relative to the throttling hole so as to change the width of the gap.

Optionally, the adjusting portion penetrates through the throttle hole, and the driving member is used for driving the adjusting portion to move along the axial direction of the throttle hole so as to change the width of the gap.

Optionally, the channel further has a receiving chamber communicating with the inlet, the receiving chamber communicating with the outlet through the orifice; the pressure regulating valve further comprises a second elastic piece, the second elastic piece is arranged in the containing cavity, and two ends of the second elastic piece are respectively connected with the valve body and the regulating part so as to drive the regulating part to move relative to the throttling hole.

Optionally, the adjusting portion has a first tapered surface for cooperating with the orifice hole, and a radial dimension of the first tapered surface increases in a direction from the orifice hole to the accommodating chamber.

Optionally, the adjusting portion has a second tapered surface for fitting with the throttle hole, and a radial dimension of the second tapered surface decreases in a direction from the spool to the throttle hole.

Optionally, the valve body is further provided with a movable cavity, and the movable cavity is communicated with the channel; the valve core is movably arranged in the movable cavity and is used for being matched with the channel so as to adjust the opening degree of the channel.

Optionally, the passage includes a first duct and a second duct, the first duct is formed with the inlet, the second duct is formed with the outlet, and both the first duct and the second duct are communicated with the movable cavity to communicate the inlet and the outlet through the movable cavity, the first duct and the second duct.

Optionally, the valve core includes a piston and a thimble connected to each other; the piston is in sealing fit with the movable cavity, and the ejector pin is used for being matched with the channel so as to adjust the opening degree of the channel; and two ends of the first elastic piece are respectively connected with the piston and the driving piece.

The embodiment of the utility model provides a pressure regulating system is still provided, and this pressure regulating system includes the air-vent valve. The pressure regulating valve comprises a valve body, a valve core, a first elastic piece and a driving piece; the valve body having an inlet, an outlet, and a passage communicating the inlet with the outlet; the valve core is movably arranged in the valve body so as to adjust the opening degree of the channel; the driving piece is connected with the valve core through the first elastic piece and is used for driving the valve core to move relative to the valve body through the first elastic piece.

The utility model discloses air-vent valve and pressure regulation system's beneficial effect includes, for example:

the embodiment of the utility model provides an air-vent valve includes valve body, case, first elastic component and driving piece. The valve body is provided with an inlet, an outlet and a channel for communicating the inlet and the outlet, and fluid entering the valve body from the inlet flows out through the channel and the outlet in sequence. The valve core is movably arranged in the valve body, so that the opening degree of the channel is adjusted through the movement of the valve core, the pressure of the fluid leaving from the outlet is adjusted, and the pressure adjusting function is realized. The driving piece is connected with the valve core through the first elastic piece, and the driving piece is used for driving the relative valve body motion of valve core through the first elastic piece, consequently when the valve core motion is driven to the driving piece in order to adjust the aperture of passageway, first elastic piece performance cushioning effect to make the pressure adjustment process more steady, and then improved the problem that pressure sudden change phenomenon appears in the pressure regulating process. When the pressure of the fluid flowing through the channel slightly changes, the first elastic piece enables the valve core to move towards the pressure change direction, and therefore pressure stability is guaranteed.

The embodiment of the utility model also provides a pressure regulating system, it includes foretell air-vent valve. Because the pressure regulating system comprises the pressure regulating valve, the pressure regulating system also has the advantages of good pressure stabilizing effect, stable pressure regulating process and capability of improving the problem of pressure mutation phenomenon in the pressure regulating process.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a pressure regulating system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first pressure regulating valve according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a second pressure regulating valve according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of the structure at IV in FIG. 2;

fig. 5 is a schematic partial structural view of a third pressure regulating valve according to an embodiment of the present invention;

fig. 6 is an enlarged view of a part of the structure at vi in fig. 3.

Icon: 10-a pressure regulation system; 100-pressure regulating valve; 110-a valve body; 111-a body; 112-connecting blocks; 113-a movable chamber; 114-a first chamber; 115-a second chamber; 120-channel; 121-a first porthole; 122-inlet; 123-a second porthole; 124-outlet; 125-orifice; 126-a receiving cavity; 130-a driver; 131-a push rod; 132-a spring seat; 141-a first elastic member; 142-a second resilient member; 150-a valve core; 151-piston; 152-a sealing ring; 153-thimble; 154-a first taper; 155-a second conical surface; 156-connecting rod; 160-gap; 210-a gas source; 220-a controller; 230-a pressure sensor; 240-application part.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as a limitation of the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Fig. 1 is a schematic structural diagram of a pressure regulating system 10 according to this embodiment, and fig. 2 is a schematic structural diagram of a first pressure regulating valve 100 according to this embodiment. Referring to fig. 1 and 2 in combination, the present embodiment provides a pressure regulating valve 100, and accordingly, a pressure regulating system 10.

The pressure regulating system 10 includes a pressure regulating valve 100, while the pressure regulating device further includes a gas source 210, a controller 220, a pressure sensor 230, and an application component 240. The application part 240 communicates with the gas source 210 through the pressure regulating valve 100 to regulate the pressure of the gas supplied to the application part 240 through the pressure regulating valve 100. The pressure sensor 230 is electrically connected to the pressure regulating valve 100 through the controller 220, the pressure sensor 230 is configured to detect an output pressure of the pressure regulating valve 100 and feed back an electrical signal representing the output pressure to the controller 220, the controller 220 compares the output pressure with a preset pressure and sends a control signal to the pressure regulating valve 100 according to a difference value, so that the pressure regulating valve 100 operates to regulate the output pressure until the difference value between the output pressure and the preset pressure is within a preset range. Optionally, the application part 240 is a sand blasting gun, and the sand blasting gun ejects the dental blasting powder to the tooth surface through the compressed air provided by the air source 210 and joins with the water ejected together to clean the tooth surface.

The pressure regulating valve 100 includes a valve body 110, a valve spool 150, a first elastic member 141, and a driver 130. The valve body 110 has an inlet 122, an outlet 124, and a passage 120 communicating the inlet 122 with the outlet 124, and fluid entering the valve body 110 from the inlet 122 flows out through the passage 120 and the outlet 124 in sequence. The valve core 150 is movably disposed in the valve body 110, so that the opening degree of the passage 120 is adjusted by the movement of the valve core 150, and the pressure of the fluid leaving from the outlet 124 is adjusted, thereby achieving a pressure adjusting function. The driving element 130 is connected to the valve element 150 through the first elastic element 141, and the driving element 130 is used for driving the valve element 150 to move relative to the valve body 110 through the first elastic element 141, so when the driving element 130 drives the valve element 150 to move to adjust the opening of the passage 120, the first elastic element 141 plays a role in buffering, so that the pressure adjusting process is more stable, and the problem of pressure mutation in the pressure adjusting process is solved. When the pressure of the fluid flowing through the channel 120 slightly changes, the first elastic member 141 moves the valve element 150 in the direction of the pressure change, thereby ensuring the pressure stability.

The following further describes the pressure regulating valve 100 according to the present embodiment:

referring to fig. 2, in the present embodiment, the driving member 130 is a linear stepping motor, and has a push rod 131, and the push rod 131 is connected to the valve core 150 through a first elastic member 141. The driving member 130 is electrically connected to the controller 220, so that the driving member 130 operates under the control of the controller 220, and the push rod 131 drives the valve core 150 to slide relative to the valve body 110, so as to increase or decrease the opening of the passage 120, thereby achieving the purpose of adjusting the pressure of the outlet 124. Meanwhile, since the valve element 150 is connected to the driver 130 through the first elastic member 141, when the driver 130 is in a shutdown state, that is, the driver 130 does not provide driving force to the valve element 150, if the pressure of the fluid entering the passage 120 changes, the valve element 150 can move under the action of the first elastic member 141, so as to achieve the purpose of pressure stabilization.

Optionally, the first elastic member 141 is a spring, and two ends of the spring along the axis of the spring are respectively connected to the push rod 131 and the valve core 150, that is, the elastic force generated by the spring is collinear with the push-pull force of the push rod 131, so that the first elastic member 141 can better buffer the sliding of the valve core 150, and the pressure adjustment process is ensured to be stable. Specifically, the push rod 131 is further provided with a spring seat 132 for mounting a spring. It is understood that in other embodiments, other parts with elasticity, such as an elastic rubber block, may be used as the first elastic member 141. Alternatively, both ends of the first elastic member 141 are fixedly connected to the push rod 131 and the valve core 150 by bonding.

Further, the valve body 110 has a movable chamber 113 therein, the valve core 150 is movably disposed in the movable chamber 113, the movable chamber 113 is communicated with the channel 120, and the valve core 150 is engaged with the channel 120, so as to adjust the opening degree of the channel 120 through the movement of the valve core 150. Specifically, the movable chamber 113 is a cylindrical cavity, and one end in the axial direction thereof penetrates the valve body 110, thereby forming an opening, which is a first opening. The driving member 130 is disposed at the first opening, and the push rod 131 of the driving member 130 extends into the movable cavity 113 through the first opening, so as to be connected to the valve core 150 through the first elastic member 141, i.e. the first elastic member 141 is also located in the movable cavity 113.

Further, the valve core 150 includes a piston 151 and a thimble 153 connected to each other, the piston 151 is in sealing engagement with the movable cavity 113, and both ends of the first elastic member 141 are connected to the piston 151 and the push rod 131 of the driving member 130, respectively. Thimble 153 is configured to cooperate with channel 120 to adjust the opening of channel 120. Specifically, the piston 151 is cylindrical, the thimble 153 is fixedly connected to an end surface of one end of the piston 151, and the first elastic element 141 is fixedly connected to an end surface of one end of the piston 151 away from the thimble 153. The radial dimension of piston 151 matches the radial dimension of active chamber 113, thereby allowing piston 151 to sealingly engage active chamber 113, and ensuring that piston 151 always sealingly engages active chamber 113 as piston 151 slides relative to valve body 110, avoiding gas leakage. Further, a sealing groove is formed in the circumferential direction of the piston 151, the valve core 150 further comprises a sealing ring 152, and the sealing ring 152 is arranged in the sealing groove, so that the piston 151 and the movable cavity 113 are in sealing fit through sealing contact between the sealing ring 152 and the wall surface of the movable cavity 113.

Further, the passage 120 includes a first port 121 and a second port 123 opened in the valve body 110, the first port 121 is formed with an inlet 122, the second port 123 is formed with an outlet 124, and both the first port 121 and the second port 123 communicate with the movable chamber 113, thereby communicating the inlet 122 and the outlet 124 through the movable chamber 113, the first port 121, and the second port 123. Specifically, since the piston 151 is in sealing engagement with the movable chamber 113, the piston 151 divides the movable chamber 113 into two independent chambers, namely, a first chamber 114 and a second chamber 115. The first chamber 114 is a chamber on a side of the piston 151 near the thimble 153, the first port 121 and the second port 123 are both communicated with the first chamber 114, the inlet 122 is an opening of the first port 121 at an end far away from the first chamber 114, and the outlet 124 is an opening of the second port 123 at an end far away from the second chamber 115. The second chamber 115 is a chamber on the side of the piston 151 near the driver 130.

Alternatively, one of the first and second orifices 121 and 123 is disposed on one axial side of the first chamber 114, and the other of the first and second orifices 121 and 123 is disposed through the circumferential wall surface of the first chamber 114. Specifically, in the pressure regulating valve 100 shown in fig. 2, the first orifice 121 is provided through the circumferential wall surface of the first chamber 114, and extends in the radial direction of the first chamber 114. The second port 123 is disposed on one side of the first chamber 114 in the axial direction and extends in the axial direction of the first chamber 114, i.e., the second port 123 is disposed coaxially with the first chamber 114.

It should be noted that specific positions of the first orifice 121 and the second orifice 123 are not limited herein, and it is understood that, in other embodiments, the positions of the first orifice 121 and the second orifice 123 may also be set according to requirements, and fig. 3 shows a structural schematic diagram of a second pressure regulating valve 100 provided in this embodiment, as shown in fig. 3, the first orifice 121 is coaxially disposed with the first chamber 114, and the second orifice 123 is disposed along a radial direction of the first chamber 114.

Fig. 4 is an enlarged view of a portion of the structure at iv in fig. 2. Referring to fig. 2 and 4, in the present embodiment, the valve core 150 has an adjustment portion, and the passage 120 has an orifice 125 engaged with the adjustment portion. A gap 160 for communicating the inlet 122 and the outlet 124 is formed between the adjusting portion and the orifice 125, and when the driving element 130 drives the valve element 150 to move relative to the valve body 110, the adjusting portion moves relative to the orifice 125, so as to change the width of the gap 160, and further change the flow area of the fluid when the fluid flows from the inlet 122 to the outlet 124, that is, the opening of the passage 120 is adjusted, in other words, the width of the gap 160 can be regarded as the opening of the passage 120, and thus the pressure of the fluid flowing out from the outlet 124 is adjusted.

Specifically, in the pressure regulating valve 100 shown in fig. 2 and 4, the orifice 125 is located at one end of the second port 123 close to the first chamber 114, and the radial dimension of the orifice 125 is the same as that of the second port 123, so the orifice 125 can also be regarded as one end portion of the second port 123 close to the first chamber 114. The adjusting portion is a portion where the thimble 153 is fitted to the orifice 125. When the regulating portion interferes with the orifice 125, that is, the width of the gap 160 is 0, the passage 120 is closed (position shown by solid line in fig. 2 and 4); when the regulating portion exits the orifice 125, the radial dimension of the portion of the regulating portion extending into the orifice 125 is considered to be 0, and the width of the gap 160 is the radius of the orifice 125, and the opening of the passage 120 is maximized (as shown by the dashed line in fig. 2 and 4).

Further, the adjustment portion is inserted through the orifice 125, and a gap 160 between the adjustment portion and the orifice 125 is a gap between a circumferential outer wall of the adjustment portion and a circumferential wall of the orifice 125. The width of the gap 160 is the minimum distance between the circumferential outer wall of the regulating portion and the circumferential wall of the orifice hole 125. It will be appreciated that in other embodiments, the gap 160 may be formed as desired, for example, the radial dimension of the adjusting portion towards the end of the throttle hole 125 is larger than the throttle hole 125, and the adjusting portion is arranged opposite to the throttle hole 125, so that the gap 160 between the adjusting portion and the throttle hole 125 is the distance between the end surface of the adjusting portion close to the end of the throttle hole 125 and the opening of the throttle hole 125 in the first chamber 114 (as shown in fig. 5).

Specifically, the orifice 125 is a cylindrical hole, and the adjustment portion has a tapered surface that fits the orifice 125, and in the pressure regulating valve 100 shown in fig. 2 and 4, the tapered surface is a second tapered surface 155, and the radial dimension of the second tapered surface 155 decreases in the direction from the spool 150 to the orifice 125, so that the depth of the second tapered surface 155 that protrudes into the orifice 125 is changed by sliding the spool 150 relative to the valve body 110 in the axial direction of the movable chamber 113, and the maximum radial dimension of the second tapered surface 155 that protrudes into the orifice 125 is changed, thereby changing the width of the gap 160 between the orifice 125 and the adjustment portion. When the valve core 150 moves in a direction approaching the throttle hole 125 under the driving of the driving member 130, the width of the gap 160 decreases, so that the flow rate decreases, and the pressure output from the outlet 124 decreases; when the valve core 150 moves away from the orifice 125 under the driving of the driver 130, the width of the gap 160 increases, so that the flow rate increases and the pressure output from the outlet 124 increases.

It should be noted that the shapes of the orifice 125 and the adjustment portion are not limited, and it is understood that in other embodiments, the shapes of the orifice 125 and the adjustment portion may be specifically set according to requirements, for example, the adjustment portion is set to be cylindrical, the orifice 125 is set to be conical, or both the adjustment portion and the orifice 125 are set to be conical, and the width of the gap 160 between the adjustment portion and the orifice 125 can be changed by the axial movement of the adjustment portion relative to the orifice 125.

Fig. 6 is an enlarged view of a part of the structure at vi in fig. 3. In the pressure regulating valve 100 shown in fig. 3 and 6, the tapered surface of the regulating portion is the first tapered surface 154, and the dimension in the radial direction of the first tapered surface 154 increases in the direction from the valve body 150 to the orifice 125. Specifically, the thimble 153 further includes a connecting rod 156, and two ends of the connecting rod 156 are respectively fixedly connected to the piston 151 and the adjusting portion. The passage 120 also has a receiving chamber 126, and the orifice 125 and the first port passage 121 communicate through the receiving chamber 126, that is, the inlet 122 communicates with the receiving chamber 126. The connecting rod 156 is inserted through the orifice 125 such that the adjustment portion is located in the accommodating chamber 126, and an end of the adjustment portion near the connecting rod 156 is inserted into the orifice 125, thereby forming a gap 160 with the orifice 125, which communicates the inlet 122 and the outlet 124. When the valve core 150 moves towards the direction close to the throttle hole 125 under the driving of the driving member 130, the width of the gap 160 becomes larger, so that the flow rate becomes larger and the pressure output from the outlet 124 becomes larger; when the valve core 150 moves away from the orifice 125 under the driving of the driver 130, the width of the gap 160 decreases, so that the flow rate decreases and the pressure output from the outlet 124 decreases.

Further, the thimble 153 is detachably connected to the piston 151 to facilitate the mounting and dismounting of the pressure regulating valve 100. It is understood that in the pressure regulating valve 100 shown in fig. 2, the thimble 153 may be fixedly connected to the piston 151 by integral molding or the like.

Further, the pressure regulating valve 100 further includes a second elastic member 142, the second elastic member 142 is disposed in the accommodating cavity 126, and two ends of the second elastic member 142 are respectively connected to the valve body 110 and the adjusting portion to drive the adjusting portion to move relative to the orifice 125, that is, the valve core 150 slides relative to the valve body 110 under the combined action of the driving member 130, the first elastic member 141 and the second elastic member 142, and the first elastic member 141 and the second elastic member 142 can play a role of buffering, so that the pressure regulating process is more stable. Alternatively, the second elastic member 142 is a spring, an axis of which extends in the axial direction of the orifice 125, and both ends of which in the axial direction are connected to the valve element 150 and the valve body 110, respectively. Specifically, the valve body 110 includes a body 111 and a connecting block 112 connected to the body 111, the first hole 121 is opened in the connecting block 112, and the connecting block 112 is installed at an opening of the accommodating chamber 126 at an end away from the throttle hole 125, so that the first hole 121 and the throttle hole 125 communicate with each other through the accommodating chamber 126. Optionally, the connecting block 112 is detachably connected to the body 111 to facilitate the assembling and disassembling of the pressure regulating valve 100.

Further, the movable cavity 113 includes a large hole section and a small hole section which are coaxially disposed, the piston 151 is in sealing fit with the small hole section, and the large hole section is located at one side of the small hole section close to the driving member 130, so as to facilitate installation of the piston 151.

According to the pressure regulating valve 100 provided in the present embodiment, the operation principle of the pressure regulating valve 100 is as follows:

in use, the driving member 130 operates according to a control signal of the controller 220, so as to drive the adjusting portion of the valve plug 150 to move relative to the orifice 125, and to change the width of the gap 160 between the adjusting portion and the orifice 125 through the relative movement of the adjusting portion and the orifice 125, so as to adjust the pressure. Since the first elastic member 141 is disposed between the valve core 150 and the driving member 130, the driving force applied to the valve core 150 is buffered by the first elastic member 141, so that the movement of the valve core 150 is smoother, and the pressure adjusting process is smoother. Meanwhile, during the operation of the pressure regulating valve 100, when the fluid pressure changes slightly and the controller 220 does not send a control signal to the driving member 130, the valve element 150 is driven by the elastic force of the first elastic member 141 to move, so as to exert the pressure stabilizing effect.

The pressure regulating valve 100 provided by the embodiment has at least the following advantages:

the embodiment of the utility model provides an air-vent valve 100, it is through setting up first elastic component 141 between driving piece 130 and case 150 to cushion, make the motion of case 150 gentler, the pressure adjustment process is more steady, and then has avoided the phenomenon that the pressure breaks suddenly. And, the first elastic member 141 can drive the valve body 150 to move when the pressure of the fluid introduced into the valve body 110 is changed, thereby realizing pressure stabilization. Meanwhile, the valve core 150 is matched with the throttling hole 125 through the conical surface, and the pressure regulating precision is high.

The present embodiment also provides a pressure regulating system 10 including the pressure regulating valve 100 described above. Since the pressure regulating system 10 includes the pressure regulating valve 100, the pressure regulating system has the advantages of smooth pressure regulating process, capability of stabilizing pressure and high pressure regulating precision.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A pressure regulating valve is characterized by comprising a valve body, a valve core, a first elastic piece and a driving piece; the valve body having an inlet, an outlet, and a passage communicating the inlet with the outlet; the valve core is movably arranged in the valve body so as to adjust the opening degree of the channel; the driving piece is connected with the valve core through the first elastic piece and is used for driving the valve core to move relative to the valve body through the first elastic piece.

2. The pressure regulating valve according to claim 1, wherein said spool has a regulating portion, said passage has an orifice fitted with said regulating portion, and a gap for communicating said inlet port and said outlet port is formed between said regulating portion and said orifice; the driving piece is used for driving the adjusting part to move relative to the throttling hole so as to change the width of the gap.

3. The pressure regulating valve according to claim 2, wherein said regulating portion is provided through said orifice, and said driving member is adapted to drive said regulating portion to move in an axial direction of said orifice to vary a width of said gap.

4. The pressure regulating valve according to claim 3, wherein said passage further has a receiving chamber communicating with said inlet, said receiving chamber communicating with said outlet through said orifice; the pressure regulating valve further comprises a second elastic piece, the second elastic piece is arranged in the containing cavity, and two ends of the second elastic piece are respectively connected with the valve body and the regulating part so as to drive the regulating part to move relative to the throttling hole.

5. The pressure regulating valve according to claim 4, wherein said regulating portion has a first tapered surface for fitting with said orifice hole, and a radial dimension of said first tapered surface increases in a direction from said orifice hole to said accommodating chamber.

6. The pressure regulating valve according to claim 3, wherein said regulating portion has a second tapered surface for fitting with said orifice, a radial dimension of said second tapered surface being reduced in a direction from said spool to said orifice.

7. The pressure regulating valve according to any one of claims 1-6, wherein said valve body further has a movable chamber therein, said movable chamber being in communication with said passage; the valve core is movably arranged in the movable cavity and is used for being matched with the channel so as to adjust the opening degree of the channel.

8. The pressure regulating valve according to claim 7, wherein said passage includes a first port formed with said inlet and a second port formed with said outlet, said first and second ports each communicating with said active chamber to communicate said inlet and said outlet through said active chamber, said first and second ports.

9. The pressure regulating valve according to claim 7, wherein said spool includes a piston and a needle connected to each other; the piston is in sealing fit with the movable cavity, and the ejector pin is used for being matched with the channel so as to adjust the opening degree of the channel; and two ends of the first elastic piece are respectively connected with the piston and the driving piece.

10. A pressure regulating system, characterized in that it comprises a pressure regulating valve according to any one of claims 1-9.

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