A linear flow control valve that adjusts the flow area from two dimensions

Abstract

This invention belongs to the field of linear flow control valve technology, proposing a linear flow control valve that adjusts the flow area in two dimensions, allowing adjustment of the actual opening area of ​​the valve inlet in both length and width. The valve stem drives the valve disc to move, thereby controlling the length of the rectangular inlet of the valve seat. The valve seat consists of a left valve seat, a right valve seat, an upper valve seat, and a lower valve seat. A valve seat drive device drives the upper and lower valve seats to rotate, thereby controlling the width of the rectangular inlet of the valve seat. The valve disc and valve seat are sealed by a spherical seal, and the valve seat and valve body are sealed by a cylindrical seal. The valve seat and valve body sealing surfaces isolate the fluid inside the valve body drive gear mounting cavity and the valve body, achieving a seal for the valve seat drive device. By adjusting the length of the rectangular inlet of the valve seat, a linear relationship between valve opening and flow rate is achieved. By adjusting the width of the rectangular inlet of the valve seat, the maximum flow rate allowed through the valve at its maximum opening is changed, solving the problem that traditional linear flow control valves cannot adjust the maximum flow rate under fully open conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of linear flow regulating valve, in particular to a linear flow regulating valve for regulating flow area from two dimensions. BACKGROUND

[0002] The linear flow regulating valve is a regulating valve for controlling flow variation by adjusting opening degree variation, and the valve flow is required to vary linearly with the valve rotation opening angle. In order to realize linear flow regulation, the valve inlet flow area needs to be linearly related to the valve opening degree, and the flow is regulated by changing the valve inlet flow area.

[0003] The common linear flow regulating valve currently changes the valve inlet flow area from one dimension, that is, by rotating the valve stem to drive the valve flap to rotate, and cooperating with the corresponding valve seat to realize flow regulation. The biggest problem of this regulation mode is that after the valve flap rotates to the maximum stroke, the valve inlet flow area reaches the maximum and cannot be changed. At this time, the maximum flow allowed by the linear flow regulating valve under full opening working condition is fixed, and when the maximum flow of the linear flow regulating valve under full opening is to be changed, the valve seat size needs to be redesigned and the valve needs to be replaced to meet the new flow demand. This design of changing the valve inlet flow area from one dimension can only meet the single flow working condition use demand, and cannot meet the increasingly complex use demand of the linear flow regulating valve. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the present application is to provide a linear flow regulating valve for regulating flow area from two dimensions, that is, the valve inlet flow area can be adjusted by rotating the valve flap, and the valve inlet flow area can also be adjusted by changing the shape of the valve seat.

[0005] The technical scheme of the present application is as follows: a linear flow regulating valve for regulating flow area from two dimensions, comprising a valve stem 1, a valve flap 2, a valve body 3, a valve seat and a valve seat driving device 4;

[0006] The valve body 3 is a T-shaped body with a communicating cavity composed of a cylinder; the T-shaped body is provided with a through hole, the valve stem 1 passes through the through hole in sequence and is fixed to the bottom of the valve body 3 with the valve flap 2, and the valve stem 1 is fixedly connected with the valve flap 2; the valve flap 2 and the valve seat driving device 4 are installed in the cylinder of the valve body 3; the cylinder is provided with a valve body inlet cavity 30;

[0007] The valve seat comprises a left valve seat 5, a right valve seat 6, an upper valve seat 7 and a lower valve seat 8; the upper valve seat 7 and the lower valve seat 8 are identical in structure, are incomplete circular rings with a notch, and are installed on the outer side of the valve disc 2; the outer surface of the upper valve seat 7 and the lower valve seat 8 is a cylindrical surface, and the inner surface is a spherical surface; the notch on the upper valve seat 7 and the lower valve seat 8 prevents interference with the valve stem 1 and the valve disc 2 during rotation and ensures sealing; the valve seat is located in the cylinder body, and the positions of the upper valve seat 7 and the lower valve seat 8 correspond to the position of the valve body inlet cavity 30; the left valve seat 5 and the right valve seat 6 are circular rings with a spherical groove and a notch; the spherical groove is in sealing contact with the valve disc 2, and the notch is located directly behind the spherical groove to reduce the resistance of fluid flowing out of the valve outlet; the left valve seat 5 and the right valve seat 6 are respectively sleeved on the two ends of the upper valve seat 7 and the lower valve seat 8; the outer surface of the upper valve seat 7 and the lower valve seat 8 is provided with a tooth groove, and the tooth groove is provided with a valve seat driving device 4; the valve seat driving device 4 drives the rotation of the upper valve seat 7 and the lower valve seat 8; the upper valve seat 7 and the lower valve seat 8 form a valve seat rectangular inlet 34, and the rotation of the upper valve seat 7 and the lower valve seat 8 driven by the valve seat driving device 4 adjusts the opening width of the valve seat rectangular inlet 34; the circular arc boss of the valve disc 2 is installed opposite to the valve body inlet cavity 30 side, the contact surface between the valve seat and the circular arc boss of the valve disc 2 is a spherical surface with the same diameter, forming a valve disc valve seat sealing surface 28; the circular arc boss of the valve disc 2 is rotated by rotating the valve stem 1, and the opening length of the valve seat rectangular inlet 34 is adjusted; the contact surface between the valve seat and the valve body 3 is a cylindrical surface with the same diameter, forming a valve seat valve body sealing surface 29; the cylindrical surface of the valve seat and the cylindrical surface of the valve body 3 are in contact with each other to form the valve seat valve body sealing surface 29, thereby sealing the valve body driving gear installation cavity 25 and isolating the contact between the valve seat driving device 4 and the fluid inside the valve body 3.

[0008] The upper valve seat 7 and the lower valve seat 8 are incomplete circular rings with a notch.

[0009] The valve stem 1 is fixed on the valve body 3 through a fixed sealing sleeve a 9, a fixed sealing sleeve b 10 and a fixed sealing sleeve c 11; the valve stem 1 is connected with the valve disc 2 through a stud 33, and the valve stem 1 drives the valve disc 2 to move.

[0010] The valve seat driving device 4 comprises an upper valve seat driving gear a12, an upper valve seat driving gear b13, a lower valve seat driving gear a14, a lower valve seat driving gear b15, an input shaft gear 16, a direction changing gear 17, an upper valve seat reduction gear 18, a lower valve seat reduction gear 19, an upper valve seat transmission shaft 20, a lower valve seat transmission shaft 21, a direction changing shaft 22 and an input shaft 23; the input shaft 23 is connected with a servo motor at the end, and the input shaft 23 is located on the input shaft gear 16; the input shaft gear 16 is meshed with the upper valve seat reduction gear 18 and the direction changing gear 17 on both sides; the upper valve seat transmission shaft 20 is sequentially fixed with the upper valve seat driving gear a12, the upper valve seat driving gear b13 and the upper valve seat reduction gear 18; the upper valve seat driving gear a12 and the upper valve seat driving gear b13 are meshed with the tooth grooves on the surface of the upper valve seat 7; the direction changing gear 17 is meshed with the lower valve seat reduction gear 19; the lower valve seat transmission shaft 21 is sequentially fixed with the lower valve seat driving gear a14, the lower valve seat driving gear b15 and the lower valve seat reduction gear 19; the lower valve seat driving gear a14 and the lower valve seat driving gear b15 are meshed with the tooth grooves on the surface of the lower valve seat 8. The input shaft 23 is connected with the servo motor, the power is transmitted to the upper valve seat reduction gear 18 through the input shaft gear 16, the upper valve seat driving gear a12 and the upper valve seat driving gear b13 are meshed with the tooth grooves on the cylindrical surface of the upper valve seat 7, the upper valve seat 7 is rotated, the power is transmitted to the direction changing gear 17 through the input shaft gear 16, then the power is transmitted to the lower valve seat reduction gear 19 through the direction changing gear 17, the lower valve seat driving gear a14 and the lower valve seat driving gear b15 are meshed with the tooth grooves on the cylindrical surface of the lower valve seat 8, the lower valve seat 8 is rotated, the direction changing gear 17 realizes the opposite rotating function of the upper valve seat reduction gear 18 and the lower valve seat reduction gear 19, so that the upper valve seat 7 and the lower valve seat 8 rotate in opposite directions, the valve seat driving device 4 is driven, and the width of the rectangular inlet 34 of the valve seat is controlled.

[0011] The cylinder body is internally provided with a valve body assembly cavity 31, and four valve body driving gear installation cavities 25 are reserved on the upper and lower parts of the cylinder body; the outer part of one side of the cylinder body is provided with a valve body gear set installation cavity 24, and an axle hole 32 is formed in the inner part.

[0012] The valve clack 2 and the valve seat are installed from the valve body assembly cavity 31 reserved in the valve body 3, the left valve seat 5 and the right valve seat 6 are fixed on the valve body 3 through two upper and lower fixing pins 26 respectively, the upper valve seat driving gear a12, the upper valve seat driving gear b13, the lower valve seat driving gear a14 and the lower valve seat driving gear b15 are installed in the four valve body driving gear installation cavities 25 reserved in the valve body 3, the upper valve seat transmission shaft 20 and the lower valve seat transmission shaft 21 are inserted into the axle hole 32 from the valve body gear set installation cavity 24 side of the valve body 3, and the end cover 27 is bolted with the valve body assembly cavity 31 on the valve body 3, so that the valve is sealed.

[0013] The beneficial effects of the present application are as follows:

[0014] The application provides a linear flow regulating valve for regulating flow area from two dimensions, rotation of a valve rod realizes regulation of opening length of a rectangular inlet of a valve seat, rotation of an input shaft realizes regulation of opening width of the rectangular inlet of the valve seat, and the flow area of the valve inlet opening is regulated from two dimensions.

[0015] The linear flow regulating valve has a complex internal structure, and through the specific structure designed in the application, sealing of a valve clack and the valve seat, sealing of the valve seat and a valve body and sealing of a valve seat driving device and fluid inside the valve body can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The application provides a linear flow regulating valve for regulating flow area from two dimensions, rotation of a valve rod realizes regulation of opening length of a rectangular inlet of a valve seat, rotation of an input shaft realizes regulation of opening width of the rectangular inlet of the valve seat, and the flow area of the valve inlet opening is regulated from two dimensions.

[0017] Figure 2 The application provides a linear flow regulating valve for regulating flow area from two dimensions, rotation of a valve rod realizes regulation of opening length of a rectangular inlet of a valve seat, rotation of an input shaft realizes regulation of opening width of the rectangular inlet of the valve seat, and the flow area of the valve inlet opening is regulated from two dimensions.

[0018] Figure 3 The application provides a linear flow regulating valve for regulating flow area from two dimensions, rotation of a valve rod realizes regulation of opening length of a rectangular inlet of a valve seat, rotation of an input shaft realizes regulation of opening width of the rectangular inlet of the valve seat, and the flow area of the valve inlet opening is regulated from two dimensions.

[0019] Figure 4 The application provides a linear flow regulating valve for regulating flow area from two dimensions, rotation of a valve rod realizes regulation of opening length of a rectangular inlet of a valve seat, rotation of an input shaft realizes regulation of opening width of the rectangular inlet of the valve seat, and the flow area of the valve inlet opening is regulated from two dimensions.

[0020] Figure 5 The application provides a linear flow regulating valve for regulating flow area from two dimensions, rotation of a valve rod realizes regulation of opening length of a rectangular inlet of a valve seat, rotation of an input shaft realizes regulation of opening width of the rectangular inlet of the valve seat, and the flow area of the valve inlet opening is regulated from two dimensions.

[0021] Figure 6 The application provides a linear flow regulating valve for regulating flow area from two dimensions, rotation of a valve rod realizes regulation of opening length of a rectangular inlet of a valve seat, rotation of an input shaft realizes regulation of opening width of the rectangular inlet of the valve seat, and the flow area of the valve inlet opening is regulated from two dimensions.

[0022] Figure 7 The application provides a linear flow regulating valve for regulating flow area from two dimensions, rotation of a valve rod realizes regulation of opening length of a rectangular inlet of a valve seat, rotation of an input shaft realizes regulation of opening width of the rectangular inlet of the valve seat, and the flow area of the valve inlet opening is regulated from two dimensions.

[0023] Figure 8 The application provides a linear flow regulating valve for regulating flow area from two dimensions, rotation of a valve rod realizes regulation of opening length of a rectangular inlet of a valve seat, rotation of an input shaft realizes regulation of opening width of the rectangular inlet of the valve seat, and the flow area of the valve inlet opening is regulated from two dimensions.

[0024] In the diagram: 1-Valve stem; 2-Valve disc; 3-Valve body; 4-Valve seat drive device; 5-Left valve seat; 6-Right valve seat; 7-Upper valve seat; 8-Lower valve seat; 9-Fixed sealing sleeve a; 10-Fixed sealing sleeve b; 11-Fixed sealing sleeve c; 12-Upper valve seat drive gear a; 13-Upper valve seat drive gear b; 14-Lower valve seat drive gear a; 15-Lower valve seat drive gear b; 16-Input shaft gear; 17-Reversing gear; 18-Upper valve seat 19 - Lower valve seat reduction gear; 20 - Upper valve seat drive shaft; 21 - Lower valve seat drive shaft; 22 - Reversing shaft; 23 - Input shaft; 24 - Valve body gear set mounting cavity; 25 - Valve body drive gear mounting cavity; 26 - Fixing pin; 27 - End cover; 28 - Valve disc / valve seat sealing surface; 29 - Valve seat / valve body sealing surface; 30 - Valve body inlet cavity; 31 - Valve body assembly cavity; 32 - Shaft hole; 33 - Stud; 34 - Valve seat rectangular inlet. Detailed Implementation

[0025] The following describes in further detail, with reference to embodiments, a linear flow control valve that adjusts the flow area from two dimensions according to the present invention:

[0026] As attached Figures 1-3 As shown, a linear flow regulating valve that adjusts the flow area from two dimensions achieves linear flow regulation and solves the needs of multiple working conditions of the valve by adjusting the opening length and opening width of the rectangular inlet 34 of the valve seat. The main structure includes valve stem 1, valve disc 2, valve body 3, left valve seat 5, right valve seat 6, upper valve seat 7, lower valve seat 8 and valve seat drive device 4.

[0027] Fixed sealing sleeves a9, b10, and c11 are connected to the valve body 3 via threads. The valve stem 1 is repositioned and installed using the three fixed sealing sleeves. The valve stem 1 and valve disc 2 are connected and fixed to each other via studs 33. When the valve stem 1 is rotated, the valve disc 2 is rotated, thereby opening and closing the valve and controlling the length of the rectangular inlet 34 of the valve seat. Since the rectangular inlet 34 of the valve seat is rectangular, under the condition that the valve inlet and outlet pressures are fixed, the rotation angle of the valve disc 2 is linearly related to the inlet flow area of ​​the valve opening, thereby achieving linear flow regulation.

[0028] The left valve seat 5, right valve seat 6, upper valve seat 7, and lower valve seat 8 together form a complete valve seat. The contact surface between the complete valve seat and the valve disc 2 is a spherical surface of the same diameter. The two spherical surfaces are in close contact, forming the valve disc / valve seat sealing surface 28, achieving a seal between the valve disc 2 and the complete valve seat, ensuring no leakage when the valve is closed. At the same time, the contact surface between the complete valve seat and the valve body 3 is a cylindrical surface of the same diameter. The two cylindrical surfaces are in close contact, forming the valve seat / valve body sealing surface 29, achieving a seal between the complete valve seat and the valve body 3.

[0029] As attached Figure 4As shown, the valve seat driving device 4 is composed of upper valve seat driving gear a 12, upper valve seat driving gear b 13, lower valve seat driving gear a 14, lower valve seat driving gear b 15, input shaft gear 16, direction changing gear 17, upper valve seat reduction gear 18, lower valve seat reduction gear 19, upper valve seat transmission shaft 20, lower valve seat transmission shaft 21, direction changing shaft 22 and input shaft 23. Among them, the upper valve seat driving gear a 12, the upper valve seat driving gear b 13, the lower valve seat driving gear a 14 and the lower valve seat driving gear b 15 have the same number of teeth, the input shaft gear 16 and the direction changing gear 17 have the same number of teeth, the upper valve seat reduction gear 18 and the lower valve seat reduction gear 19 have the same number of teeth, which ensures that the upper valve seat 7 and the lower valve seat 8 rotate in opposite directions and have the same rotation angle.

[0030] The input shaft 23 is connected to the servo motor, and the power is transmitted to the upper valve seat reduction gear 18 through the input shaft gear 16. The upper valve seat driving gear a 12 and the upper valve seat driving gear b 13 are engaged with the tooth groove on the cylindrical surface of the upper valve seat 7, realizing the rotation of the upper valve seat 7. The power is transmitted to the direction changing gear 17 through the input shaft gear 16, and then transmitted to the lower valve seat reduction gear 19 by the direction changing gear 17. The lower valve seat driving gear a 14 and the lower valve seat driving gear b 15 are engaged with the tooth groove on the cylindrical surface of the lower valve seat 8, realizing the rotation of the lower valve seat 8. Through the direction changing gear 17, the upper valve seat reduction gear 18 and the lower valve seat reduction gear 19 realize the function of rotating in opposite directions, so that the upper valve seat 7 and the lower valve seat 8 rotate in opposite directions. By driving the valve seat driving device 4 to rotate, the width of the valve seat rectangular inlet 34 is controlled, the maximum flow allowed to pass under the maximum opening of the linear flow regulating valve is changed, and the demand of different working conditions is met.

[0031] As shown in Figure 3 , Figure 5 and Figure 6 , the valve stem 1, the valve flap 2, the complete valve seat and the valve seat driving device 4 are installed in the valve body 3, the valve flap 2 and the complete valve seat are installed from the valve body assembly cavity 31 reserved in the valve body 3, the left valve seat 5 and the right valve seat 6 are fixed on the valve body 3 through the upper and lower two fixed pins 26 respectively, the upper valve seat 7 and the lower valve seat 8 can rotate along the cylindrical surface in the valve body 3, and have a notch to prevent interference with the fixed sealing sleeve b 10 and the fixed sealing sleeve c 11 during rotation.

[0032] The upper valve seat driving gear a12, the upper valve seat driving gear b13, the lower valve seat driving gear a14 and the lower valve seat driving gear b15 are respectively installed in the four valve body driving gear installation cavities 25 reserved in the valve body 3; the upper valve seat transmission shaft 20 and the lower valve seat transmission shaft 21 are inserted into the shaft holes 32 from the valve body gear group installation cavity 24 side of the valve body 3. The complete valve seat cylindrical surface and the cylindrical surface of the valve body 3 are in close contact with each other to form a valve seat valve body sealing surface 29, so as to realize the sealing of the valve body driving gear installation cavity 25, and isolate the valve seat driving device 4 from the fluid in the valve body 3; the end cover 27 is bolted with the valve body assembly cavity 31 on the valve body 3 to realize the valve body sealing.

[0033] As shown in Figure 7 and Figure 8 With the rotation of the valve disc 2, the linear flow regulating valve opening inlet area changes linearly, so as to ensure the linear relationship between the flow and the opening angle of the valve disc 2. The rotary valve seat driving device 4 changes the width of the rectangular inlet 34 of the valve seat, so as to realize the adjustment of the maximum flow allowed when the valve is fully opened, and to meet the requirements of multiple working conditions without replacing the valve.

[0034] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and still fall within the protection scope of the present application.

Claims

1. A linear flow regulating valve that regulates flow area from two dimensions, characterized in that, The linear flow regulating valve for regulating flow area from two dimensions comprises a valve rod (1), a valve disc (2), a valve body (3), a valve seat and a valve seat driving device (4); The valve body (3) is a T-shaped body and a cylinder body which form a communicating cavity; the T-shaped body is provided with a through hole, the valve rod (1) passes through the through hole and is fixed to the bottom of the valve body (3) in sequence with the valve disc (2), the valve rod (1) is fixedly connected with the valve disc (2); the valve disc (2) and the valve seat driving device (4) are installed in the cylinder body of the valve body (3); the cylinder body is provided with a valve body inlet cavity (30); The valve seat comprises a left valve seat (5), a right valve seat (6), an upper valve seat (7) and a lower valve seat (8); the upper valve seat (7) and the lower valve seat (8) are the same in structure, are incomplete circular rings with a gap and are installed on the outer side of the valve disc (2); the outer surface formed by the upper valve seat (7) and the lower valve seat (8) is a cylindrical surface, the inner surface is a spherical surface, the gap on the upper valve seat (7) and the lower valve seat (8) prevents interference with the valve rod (1) and the valve disc (2) during rotation and ensures sealing; the valve seat is located in the cylinder body, the positions of the upper valve seat (7) and the lower valve seat (8) correspond to the position of the valve body inlet cavity (30); the left valve seat (5) and the right valve seat (6) are circular rings with a spherical groove and a gap, the spherical groove is in sealing contact with the valve disc (2), the gap is located right behind the spherical groove to reduce the resistance of fluid flowing out of the valve outlet; the left valve seat (5) and the right valve seat (6) are respectively sleeved on the two ends of the upper valve seat (7) and the lower valve seat (8); the outer surface of the upper valve seat (7) and the lower valve seat (8) is provided with a gear slot, the gear slot is provided with the valve seat driving device (4), and the upper valve seat (7) and the lower valve seat (8) are driven to rotate by the valve seat driving device (4); the upper valve seat (7) and the lower valve seat (8) form a valve seat rectangular inlet (34), the rotation of the upper valve seat (7) and the lower valve seat (8) is driven by the valve seat driving device (4) to adjust the opening width of the valve seat rectangular inlet (34); the circular-arc boss of the valve disc (2) is installed opposite to the side of the valve body inlet cavity (30), the contact surface between the valve seat and the circular-arc boss of the valve disc (2) is a spherical surface with the same diameter, forming a valve disc valve seat sealing surface (28); the circular-arc boss of the valve disc (2) is rotated by rotating the valve rod (1), and then the opening length of the valve seat rectangular inlet (34) is adjusted; the contact surface between the valve seat and the valve body (3) is a cylindrical surface with the same diameter, forming a valve seat valve body sealing surface (29).

2. The linear flow regulating valve that regulates flow passage area in two dimensions according to claim 1, characterized by, The upper valve seat (7) and the lower valve seat (8) are 1 / 5 incomplete circular rings with a gap.

3. The linear flow regulating valve that regulates the flow passage area in two dimensions according to claim 1 or 2, characterized by, The valve rod (1) is fixed on the valve body (3) through a fixed sealing sleeve a (9), a fixed sealing sleeve b (10) and a fixed sealing sleeve c (11) respectively; the valve rod (1) is connected with the valve disc (2) through a stud (33), and the valve rod (1) drives the valve disc (2) to move by rotating.

4. The linear flow regulating valve that regulates flow passage area in two dimensions according to claim 3, characterized by, The valve seat driving device (4) comprises an upper valve seat driving gear a (12), an upper valve seat driving gear b (13), a lower valve seat driving gear a (14), a lower valve seat driving gear b (15), an input shaft gear (16), a direction changing gear (17), an upper valve seat reduction gear (18), a lower valve seat reduction gear (19), an upper valve seat transmission shaft (20), a lower valve seat transmission shaft (21), a direction changing shaft (22) and an input shaft (23); the input shaft (23) is connected with a servo motor at one end and is located on the input shaft gear (16); the input shaft gear (16) is meshed with the upper valve seat reduction gear (18) and the direction changing gear (17) on the two sides respectively; the upper valve seat transmission shaft (20) is sequentially fixed with the upper valve seat driving gear a (12), the upper valve seat driving gear b (13) and the upper valve seat reduction gear (18); the upper valve seat driving gear a (12) and the upper valve seat driving gear b (13) are meshed with the tooth grooves on the surfaces of the upper valve seat (7) respectively; the direction changing gear (17) is meshed with the lower valve seat reduction gear (19); the lower valve seat transmission shaft (21) is sequentially fixed with the lower valve seat driving gear a (14), the lower valve seat driving gear b (15) and the lower valve seat reduction gear (19); the lower valve seat driving gear a (14) and the lower valve seat driving gear b (15) are meshed with the tooth grooves on the surfaces of the lower valve seat (8) respectively.

5. The linear flow regulating valve that regulates flow passage area in two dimensions according to claim 4, characterized by, The cylinder body is internally provided with a valve body assembly cavity (31); four valve body driving gear installation cavities (25) are reserved on the upper and lower cylinder body; a valve body gear set installation cavity (24) is arranged on one side of the cylinder body, and an axle hole (32) is formed in the interior.

6. The linear flow regulating valve that regulates flow passage area in two dimensions according to claim 5, wherein The valve clack (2) and the valve seat are installed from the valve body (3) reserved valve body assembly cavity (31), the left valve seat (5) and the right valve seat (6) are fixed on the valve body (3) through two upper and lower fixing pins (26) respectively, the upper valve seat driving gear a (12), the upper valve seat driving gear b (13), the lower valve seat driving gear a (14) and the lower valve seat driving gear b (15) are installed in the four valve body driving gear installation cavities (25) reserved in the valve body (3) respectively, the upper valve seat transmission shaft (20) and the lower valve seat transmission shaft (21) are inserted and installed in the axle hole (32) from the valve body gear set installation cavity (24) side of the valve body (3), and the end cover (27) is bolted with the valve body assembly cavity (31) on the valve body (3), so that the sealing of the valve is realized.

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