Digital throttling valve

Abstract

The present disclosure provides a digital throttle valve, comprising a valve body, a main valve core, a valve cover and a motor assembly, the valve body and the valve cover form a space, the main valve core moves in the space, the first cavity is formed between the main valve core and the valve body, the second cavity is formed between the valve cover and the main valve core, the first end of the valve body is provided with a liquid inlet, the side of the valve body is provided with a working port and an exhaust port, the side of the valve cover is provided with a return port, the motor assembly is arranged on the valve cover, the motor assembly is connected with a pilot valve core, the pilot valve core penetrates through the valve cover and extends into the space. The main valve core and the pilot valve core of the present disclosure are matched with each other, can be used in coal mines, dust explosion-proof occasions and the like, does not affect the load torque of the motor, can be used in super-large flow control occasions; the throttle valve has small volume, less parts, can be matched with a smaller power motor, so that the processing cost and the use cost of the valve are lower.

Description

Technical Field

[0001] This disclosure relates to the technical field of valve devices, and more particularly to a digital throttle valve. Background Technology

[0002] In hydraulic systems, the control of fluid media includes the control of direction, flow rate, and pressure. Among these, flow control valves mainly include throttle valves and speed control valves. Throttle valves change the flow rate by altering the opening size of the valve port, while speed control valves, based on throttle valves, add an inlet pressure regulation function to ensure that the flow rate remains constant when the load pressure changes.

[0003] Throttling valves are classified according to the source of driving force into manual throttle valves, proportional throttle valves controlled by proportional electromagnets, servo valves controlled by torque motors, and digital throttle valves controlled by stepper motors or servo motors.

[0004] The key performance indicators of a throttle valve mainly include flow regulation range, control accuracy, and response time. Servo-controlled throttle valves integrate the actuator and valve, achieving high control accuracy through feedback regulation. However, this type of throttle valve is more expensive and is generally used in high-precision control applications. Manual throttle valves and proportional throttle valves are generally used in low-precision control applications.

[0005] Current research on digital throttle valves is limited. Most existing valves employ a structure where a motor directly drives the valve core. However, this method places immense hydraulic pressure on the motor during operation, requiring a high-power motor. This makes them unsuitable for explosion-proof environments such as coal mines, dusty environments, and chemical plants. Furthermore, the large size of the motor increases manufacturing and operating costs. Moreover, when the valve core diameter and pressure exceed certain values, a suitable motor may not be compatible, significantly limiting the flow and pressure parameters of digital throttle valves. Summary of the Invention

[0006] In view of this, the present disclosure aims to provide a digital throttle valve to solve the technical problems of existing throttle valves being unable to adapt to explosion-proof environments and being unable to match suitable motors.

[0007] This disclosure provides a digital throttle valve, including a valve body, a valve core, a valve cover, and a motor assembly. The valve body and the valve cover form a space, and the main valve core moves within the space. A first cavity is formed between the main valve core and the valve body, and a second cavity is formed between the valve cover and the main valve core. A liquid inlet is provided at a first end of the valve body, and a working port and a vent port are provided on the side of the valve body. A return port is provided on the side of the valve cover. The motor assembly is mounted on the valve cover and is connected to a pilot valve core, which extends through the valve cover into the space.

[0008] In some embodiments, the return port is connected to the second cavity via a channel, and the extension direction of the channel is consistent with the length direction of the valve body.

[0009] In some embodiments, the main valve core includes a valve core seat, a valve core rod is disposed on the valve core seat, the valve core seat is disposed on a side close to the valve cover, a limiting portion is disposed on the inner wall of the valve body, the valve core seat is restricted to move between the limiting portion and the valve cover, and the valve core rod extends toward the liquid inlet.

[0010] In some embodiments, a connection hole is provided on the valve core seat, the pilot valve core passes through the connection hole, and a groove is provided on the surface of the pilot valve core, the groove cooperating with the connection hole on the main valve core to form a pilot valve port.

[0011] In some embodiments, the groove is shaped such that when the pilot valve core moves away from the main valve core relative to the liquid inlet, the cross-sectional area of ​​the pilot valve port decreases; and when the pilot valve core moves closer to the liquid inlet relative to the main valve core, the cross-sectional area of ​​the pilot valve port increases.

[0012] In some embodiments, the motor assembly includes a motor mounting base and a motor. The motor mounting base is disposed on the valve cover, and the motor is disposed on the motor mounting base. The motor shaft of the motor is connected to the pilot valve core, and the motor shaft can be controlled to extend or retract in the direction of the valve body.

[0013] In some embodiments, a first sealing ring is provided between the pilot valve core and the valve cover, and a second sealing ring is provided between the valve cover and the valve body.

[0014] In some embodiments, a third sealing ring and a fourth sealing ring are provided between the valve body and the main valve core. The third sealing ring is installed in a mounting groove on the outer wall of the main valve core and is installed in the valve body along with it. The fourth sealing ring is provided in a mounting groove on the inner wall of the valve body.

[0015] In some embodiments, the third sealing ring is a Glyd ring, and the fourth sealing ring is a Sterling ring.

[0016] In some embodiments, the return port is disposed opposite to the working port.

[0017] This embodiment employs a main valve core and a pilot valve core that cooperate with each other. The pilot valve core has a small diameter, requiring only a small-thrust motor to drive its movement, resulting in low driving power and suitability for explosion-proof applications such as coal mines and dusty environments. The main valve core is driven by hydraulic pressure, and its diameter does not affect the motor's load torque, making it suitable for ultra-high flow control applications. Finally, the main valve core and pilot valve core are integrated, resulting in a smaller throttle valve size and fewer parts, allowing for the use of a smaller-power motor and lower manufacturing and operating costs.

[0018] To make the above-mentioned objects, features and advantages of this disclosure more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with or without letter suffixes may indicate different instances of similar parts. The drawings generally illustrate various embodiments by way of example rather than limitation and are used, together with the description and claims, to illustrate the disclosed embodiments. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method. The accompanying drawings, which are provided to further understand this disclosure and form part of this application, are used to explain the illustrative embodiments of this disclosure and do not constitute an undue limitation of this disclosure. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the digital throttle valve provided in this disclosure;

[0021] Figure 2 This is a schematic diagram of the liquid flow of the digital throttle valve provided in this disclosure;

[0022] Figure 3 yes Figure 2 A magnified view of a portion of the image.

[0023] The above figures include the following reference numerals:

[0024] 1-Valve body; 1a-Space; 2-Main valve core; 3-Valve cover; 4-Pilot valve core; 5-Motor mounting base; 6-Motor shaft; 7-Motor; 8-First sealing ring; 9-Second sealing ring; 10-Third sealing ring; 11-Fourth sealing ring; 12-Working port; 13-Exhaust port; 14-Return port; 15-First chamber; 16-Second chamber; 17-Channel; 18-Main valve port; 19-Inlet port; 21-Valve core seat; 22-Valve core rod; 23-Connecting hole; 41-Groove. Detailed Implementation

[0025] The specific embodiments of this disclosure will now be described in detail with reference to the accompanying drawings, but these are not intended to limit the scope of this disclosure.

[0026] It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this disclosure will be apparent to those skilled in the art.

[0027] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present disclosure and, together with the general description of the disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.

[0028] These and other features of this disclosure will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0029] It should also be understood that although this disclosure has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this disclosure, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0030] The above and other aspects, features and advantages of this disclosure will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0031] Specific embodiments of the present disclosure are described thereafter with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present disclosure and can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the present disclosure. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of substantially any suitable detailed structures.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in still another embodiment,” all of which may refer to one or more of the same or different embodiments according to this disclosure.

[0034] This disclosure provides a digital throttle valve, such as Figures 1-3 As shown, it includes a valve body 1, a main valve core 2, a valve cover 3, and a motor assembly. The valve body 1 and the valve cover 3 form a space 1a, within which the main valve core 2 moves. The valve cover 3 is mounted on the valve body 1, for example, by bolts.

[0035] The valve body 1 has an inlet 19 at its first end, forming a main valve port 18 between the inlet 19 and the main valve core 2. The valve body 1 has a working port 12 and an exhaust port 13 on its side, and the valve cover 3 has a return port 14 on its side. The return port 14 is positioned opposite the working port 12. The valve cover 3 is located at the second end of the valve body 1. The main valve core 2 moves within the space 1a, forming a first cavity 15 between itself and the valve body 1, and a second cavity 16 between the valve cover 3 and the main valve core 2. The working port 12 is used for connection to other devices for control.

[0036] Further, the main valve core 2 includes a valve core seat 21, on which a valve core rod 22 is disposed. The valve core seat 21 is located on the side near the valve cover 3. A limiting portion 19 is provided on the inner wall of the valve body 1, restricting the valve core seat 21 from moving between the limiting portion 19 and the valve cover 3. The valve core rod 22 extends towards the liquid inlet 19. Here, the cross-sectional area of ​​the outer diameter of the valve core rod 22 is S1, and the cross-sectional area of ​​the inner diameter of the valve body 1 is S2.

[0037] Furthermore, the return port 14 is connected to the second chamber 16 through the channel 17, that is, the fluid in the second chamber 16 can flow out through the channel 17 and the return port 14. Here, the extension direction of the channel 17 is consistent with the length direction of the valve body 1.

[0038] Furthermore, the motor assembly is disposed on the valve cover 3, particularly on the outer side of the valve cover 3 and away from the valve body 1. The motor assembly is connected to the pilot valve core 4, which extends through the valve cover 3 into the space 1a. For example, the valve cover 3 has a through hole through which the end of the pilot valve core 4 extends into the space 1a. The pilot valve core 4 has a small diameter, resulting in a small force-bearing area. Only a small-thrust motor is needed to drive the movement of the pilot valve core 4, resulting in low driving power and wide applicability in explosion-proof environments such as coal mines and dusty environments.

[0039] Specifically, the motor assembly includes a motor mounting base 5 and a motor 7. The motor mounting base 5 is mounted on the valve cover 3, for example, by bolts, and the motor 7 is mounted on the motor mounting base 5, for example, by bolts. When the main valve core 2 moves within the valve body 1, the valve cover 3, the motor mounting base 5, and the motor 7 remain stationary relative to the valve body 1. The motor 7 can be a stepper motor or a servo motor. When a servo motor is used, it can have a motor shaft position feedback function, which can make the control more precise.

[0040] The motor 7 is equipped with a motor shaft 6, which is connected to the pilot valve core 4. The motor 7 can control the motor shaft 6 to extend and retract towards the valve body 1, thereby achieving... Figure 1 The pilot valve core 4 in this embodiment is mounted on the motor shaft 6 via a threaded connection, thereby enabling it to reciprocate left and right along with the motor shaft 6. The cross-sectional area of ​​the outer diameter section of the end of the pilot valve core 4 is S3.

[0041] In this embodiment, the motor 7 is a linear motor, meaning that the motor shaft 6 achieves linear motion. Of course, a rotary motor can also be selected, where the motor shaft achieves rotational motion. However, when a rotary motor is selected, mechanical structures such as threaded pairs are needed to convert the rotational motion into linear motion. This embodiment does not impose any limitations on this.

[0042] Furthermore, in order to achieve a seal at the connection point, a first sealing ring 8 is provided between the pilot valve core 4 and the valve cover 3. For example, the first sealing ring 8 is provided inside the through hole on the valve cover 3. A second sealing ring 9 is provided between the valve cover 3 and the valve body 1. For example, the second sealing ring 9 is provided on the end face of the second end of the valve body 1. In this way, the first sealing ring 8 achieves the sealing effect between the pilot valve core 4 and the valve cover 3, and the second sealing ring 9 achieves the sealing effect between the valve cover 3 and the valve body 1.

[0043] Furthermore, a third sealing ring 10 and a fourth sealing ring 11 are provided between the valve body 1 and the main valve core 2. The third sealing ring 10 is preferably a Glyd ring, which is a two-way combined sealing ring for bores, composed of a rubber O-ring and a polytetrafluoroethylene (PTFE) ring. The Glyd ring is a double-acting piston seal, characterized by low friction, low starting force, and high pressure resistance. The fourth sealing ring is preferably a Step ring, which is a one-way combined sealing ring for shafts.

[0044] Specifically, the third sealing ring 10 is installed in the mounting groove on the outer wall of the main valve core 2.

[0045] The main valve core 2 is installed inside the valve body 1, facilitating its left-right movement within the valve body 1. The third sealing ring 10 is specifically disposed on the outer wall of the valve core seat 21. The fourth sealing ring 11 is disposed in a mounting groove on the inner wall of the valve body 1, thus abutting against the main valve core 2 to achieve a seal. The fourth sealing ring 11 is specifically disposed on the limiting portion 19. In this embodiment, both the third sealing ring 10 and the fourth sealing ring 11 serve to achieve a seal between the inner wall of the valve body 1 and the outer wall of the main valve core 2, preventing liquid from flowing through the gap between the main valve core 2 and the valve body 1.

[0046] Furthermore, a connecting hole 23 is provided on the valve core seat 21 of the main valve core 2, and the pilot valve core 4 passes through the connecting hole 23, wherein, as shown... Figure 3 As shown, a groove 41 is provided on the surface of the pilot valve core 4. The groove 41 cooperates with the connecting hole 21 on the main valve core 2 to form a pilot valve port A, so that liquid can pass through the pilot valve port A.

[0047] Specifically, the groove 41 here has a special shape. When the pilot valve core 4 moves to the right relative to the main valve core 2 in the figure (i.e., away from the liquid inlet 19), the cross-sectional area of ​​the pilot valve port A decreases, thus reducing the amount of liquid flowing through. When the pilot valve core 4 moves to the left relative to the main valve core 2 in the figure (i.e., closer to the liquid inlet 19), the cross-sectional area of ​​the pilot valve port A increases, thus increasing the amount of liquid flowing through.

[0048] In the process of using the digital throttle valve described in this embodiment, the high-pressure fluid enters from the inlet 19 of the valve body 1 and is divided into two paths. The first path flows directly through the main valve port 18 to the working port 12; the second path flows through the pilot valve port A to the second chamber 16, and then from the second chamber 16 through the channel 17 to the return port 14. Here, the return port 14 is used to connect to the fluid tank in the hydraulic system, and its pressure is 0.

[0049] If the hydraulic pressure entering through the inlet 19 is p0, then the force exerted on the left side of the main valve core 2 towards the right side of the diagram is F0, and the magnitude of F0 is:

[0050] F0 = pressure p0 × (S1 - S3).

[0051] Here, S1 is the cross-sectional area of ​​the outer diameter section of the valve core rod 22, and S3 is the cross-sectional area of ​​the outer diameter section of the pilot valve core 4.

[0052] Under the influence of force F0, when the liquid in the second chamber 16 flows from the channel 17 to the return port 14, the pressure in the second chamber 16 will be greater than 0 due to pressure loss. Let this pressure be p1, where the magnitude of p1 is affected by the flow rate of the channel 17, with a larger flow rate resulting in higher pressure.

[0053] The larger p1 is.

[0054] The hydraulic pressure in the second chamber 16 will act on the main valve core 2, forming a force F1 to the left of the figure. The magnitude of F1 is:

[0055] F1 = pressure p1 × (S2 - S3).

[0056] Here, S2 is the cross-sectional area of ​​the inner diameter section of the valve body 1, and S3 is the cross-sectional area of ​​the outer diameter section of the pilot valve core 4.

[0057] In this way, when setting the digital throttle valve, by selecting appropriate area values, namely S1, S2, S3 and the shape of the groove 41 on the pilot valve core 4, it can be ensured that F0 = F1 when the main valve core 2 and the pilot valve core 4 are in a relative position, that is, the main valve core 2 is kept stationary under force balance.

[0058] The proportional valve in this embodiment can also control the flow rate of the working port 12 to increase, wherein when the motor shaft 6 is controlled to move away from the valve body 1 ( Figure 1 When the main valve core 2 moves to the right, the motor shaft 6 drives the pilot valve core 4 to move to the right. The flow area of ​​the pilot valve port A decreases, which reduces the flow rate of the pilot valve port A and the flow rate of the channel 17, thereby reducing the pressure p1 and F1. As a result, the main valve core 2 is no longer under force balance and moves to the right under the action of the resultant force.

[0059] When the main valve core 2 moves towards Figure 1 When the valve moves to the right, the flow area of ​​the pilot valve port A increases, which increases the flow rate of the pilot valve port A and the channel 17, resulting in an increase in pressure p1 and F1. When the distance moved by the main valve core 2 is equal to that of the pilot valve core 4, the flow area of ​​the pilot valve port A and the pressure p1 return to their original equilibrium values, causing the main valve core 2 to be re-balanced and remain stationary.

[0060] Through the above process, the main valve core 2 always moves with the pilot valve core 4. During the movement of the main valve core 2, the opening of the main valve port 18 will be increased, that is, the size of the opening of the main valve port 18. The larger the opening of the main valve port 18, the greater the flow rate from the main valve port 18 to the working port 12.

[0061] The proportional valve in this embodiment can also control the flow rate at the working port 12 to decrease, similar to the flow rate increase control described above. Specifically, when the motor shaft 6 is controlled to move closer to the valve body 1 ( Figure 1 When the motor shaft 6 moves to the left (in the middle direction), the pilot valve core 4 is driven to move to the left in the figure, which increases the flow area of ​​the pilot valve port A, thereby increasing the flow of the pilot valve port A and the channel 17, resulting in an increase in pressure p1 and F1. As a result, the main valve core 2 is no longer under force balance, and under the action of the resultant force to the left, the main valve core 2 moves to the left.

[0062] When the main valve core 2 moves to the left in the diagram, the flow area of ​​the pilot valve port A decreases, resulting in a decrease in the flow rate of the pilot valve port A and the flow rate of the channel 17, which in turn reduces the pressure p1 and F1. When the distance moved by the main valve core 2 is equal to that of the pilot valve core 4, the flow area of ​​the pilot valve port A and the pressure p1 return to their original equilibrium values, causing the main valve core 2 to regain its equilibrium and remain stationary.

[0063] Through the above process, the main valve core 2 always moves with the pilot valve core 4. During the movement of the main valve core 2, the opening of the main valve port 18 will be reduced, that is, the size of the opening of the main valve port 18. The smaller the opening of the main valve port 18, the smaller the flow rate from the main valve port 18 to the working port 12.

[0064] During the above operation, the positions of the main valve core 2 and the pilot valve core 4 jointly adjust the hydraulic pressure acting on the main valve core 2, thus affecting the force state of the main valve core 2. This ensures that the main valve core 2 always moves with the pilot valve core 4, thereby changing the opening degree of the main valve port 18 during the movement and thus regulating the flow rate. This has the following advantages:

[0065] This embodiment employs a two-stage valve core structure where the positions of the pilot valve core and the main valve core jointly influence the force on the main valve core, thus ensuring the main valve core follows the movement of the pilot valve core. The pilot valve core has a small diameter and a small force-bearing area, requiring only a small-thrust motor to drive its movement, resulting in low drive power and suitability for explosion-proof applications such as coal mines and dusty environments. The main valve core is hydraulically driven; increasing its area to improve flow rate does not affect the force on the motor, making it suitable for ultra-high flow control applications.

[0066] The embodiments disclosed herein employ a main valve core and a pilot valve core that cooperate with each other, which can be used in explosion-proof environments such as coal mines and dust environments without affecting the load torque of the motor, and can be used in ultra-large flow control applications; the throttle valve is small in size and has fewer parts, and can be used with a smaller power motor, making the valve's processing cost and operating cost lower.

[0067] In the above embodiments of this disclosure, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0068] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0069] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this disclosure.

[0070] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0071] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A digital throttle valve, characterized in that, The system includes a valve body, a main valve core, a valve cover, and a motor assembly. The valve body and the valve cover form a space, within which the main valve core moves. A first cavity is formed between the main valve core and the valve body, and a second cavity is formed between the valve cover and the main valve core. The valve body has an inlet at its first end, a working port and an exhaust port on its side, and a return port on the side of the valve cover. The motor assembly is mounted on the valve cover and connected to a pilot valve core, which extends through the valve cover into the space. The return port communicates with the second cavity via a channel. The extension direction of the channel is consistent with the length direction of the valve body; the main valve core includes a valve core seat, a valve core rod is disposed on the valve core seat, the valve core seat is disposed on the side close to the valve cover, a limiting part is disposed on the inner wall of the valve body, the valve core seat restricts movement between the limiting part and the valve cover, the valve core rod extends toward the liquid inlet; a connecting hole is disposed on the valve core seat, the connecting hole communicates with the liquid inlet, the pilot valve core passes through the connecting hole, a groove is disposed on the surface of the pilot valve core, the groove cooperates with the connecting hole on the main valve core to form a pilot valve port.

2. The digital throttle valve according to claim 1, characterized in that, The groove is shaped such that when the pilot valve core moves away from the liquid inlet relative to the main valve core, the cross-sectional area of ​​the pilot valve port decreases; and when the pilot valve core moves closer to the liquid inlet relative to the main valve core, the cross-sectional area of ​​the pilot valve port increases.

3. The digital throttle valve according to claim 1, characterized in that, The motor assembly includes a motor mounting base and a motor. The motor mounting base is disposed on the valve cover, and the motor is disposed on the motor mounting base. The motor shaft of the motor is connected to the pilot valve core. The motor shaft can be controlled to extend or retract in the direction of the valve body.

4. The digital throttle valve according to claim 1, characterized in that, A first sealing ring is provided between the pilot valve core and the valve cover, and a second sealing ring is provided between the valve cover and the valve body.

5. The digital throttle valve according to claim 1, characterized in that, A third sealing ring and a fourth sealing ring are provided between the valve body and the main valve core. The third sealing ring is installed in the mounting groove on the outer wall of the main valve core and is installed in the valve body along with it. The fourth sealing ring is provided in the mounting groove on the inner wall of the valve body.

6. The digital throttle valve according to claim 5, characterized in that, The third sealing ring is a Glyd ring, and the fourth sealing ring is a Sterling ring.

7. The digital throttle valve according to claim 1, characterized in that, The return port is positioned opposite to the working port.

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