Double-sided flexible sealing swing valve

Abstract

The double-sided flexible sealing swing valve comprises a valve body, a swing shaft and a valve element, the valve element is arranged in the valve body through the swing shaft, the valve element is composed of a valve element base plate, a sealing air bag and a supporting air bag, the sealing air bag and the supporting air bag are arranged on the two sides of the valve element base plate, and the sizes of the sealing air bag and the supporting air bag can be changed through inflation and deflation; the valve seat on one side of the valve channel is a sealing valve seat, the inner end face of the sealing valve seat is a sealing face, the sealing air bag is attached to the sealing valve seat in an extrusion mode, and sealing control is achieved by adjusting the attaching force between the sealing air bag and the sealing face through inflation and deflation. The valve seat on the other side of the valve channel is a supporting valve seat, the inner end face of the supporting valve seat is a supporting face, the supporting air bag is attached to the supporting valve seat in an extrusion mode, the supporting force on the supporting face is changed through inflation and deflation, and supporting control is achieved. The counter-acting force of the supporting air bag axially acts on the valve element, so that the attaching force between the sealing air bag and the sealing face is increased under the action of the counter-acting force. The swing valve sealing air bag is adjustable in sealing force and high in adaptability, the supporting air bag can stabilize the valve element, and the impact resistance is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of swing valves, and in particular relates to a double-sided flexible sealing swing valve. Background Art

[0002] In the existing swing valve structure, the traditional swing valve has problems such as insufficient sealing performance, poor support stability, low control accuracy, etc. Especially when dealing with high-pressure, corrosive or high-viscosity media, the wear of the sealing material leads to a decrease in sealing performance, and the valve core support structure is unstable, affecting the normal operation of the valve. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a double-sided flexible sealing swing valve, which improves the sealing performance, sealing adaptability and vibration resistance of the swing valve through the double-sided flexible sealing structure of the sealing airbag and the supporting airbag.

[0004] Technical solution: To achieve the above-mentioned purpose, a double-sided flexible sealing swing valve of the present invention comprises a valve body, a swing shaft and a valve core, wherein the valve core is arranged in the valve body through the swing of the swing shaft to switch positions between the valve cavity and the valve channel of the valve body, and the valve core follows the swing shaft to control the opening relative to the valve channel;

[0005] The valve core is composed of a valve core substrate and a sealing airbag and a supporting airbag respectively arranged on two side surfaces thereof, and the sealing airbag and the supporting airbag can both be changed in size by inflating and deflating air;

[0006] The valve seat on one side of the valve channel is a sealing valve seat, the inner end surface of the sealing valve seat is a sealing surface, the sealing airbag is pressed and fitted with the sealing valve seat, and the fitting force with the sealing surface is adjusted by inflation and deflation to achieve sealing control;

[0007] The valve seat on the other side of the valve channel is a support valve seat, the inner end surface of the support valve seat is a support surface, the support airbag is pressed and fitted with the support valve seat, and the support force on the support surface is changed by inflation and deflation to achieve support control;

[0008] The reaction force of the supporting airbag acts axially on the valve core, so that the sealing airbag increases the contact force with the sealing surface under the action of the force.

[0009] Furthermore, grooves are respectively provided on the two side surfaces of the valve core substrate, and the sealing airbag and the supporting airbag centrally cover the corresponding grooves to form a flexible sealing cavity and a flexible supporting cavity; two clamping cavities are arranged inside the valve core substrate, and the flexible sealing cavity is connected with the adjacent clamping cavity through the first air hole at the bottom of the cavity, and the flexible supporting cavity is connected with the adjacent clamping cavity through the second air hole at the bottom of the cavity; air nozzles corresponding to the clamping cavities are arranged on the outside of the valve core substrate, and the two air nozzles are respectively connected with an inflation and deflation system through flexible air pipes, and the sealing airbag and the supporting airbag each correspond to an inflation and deflation system, so that the sealing airbag and the supporting airbag can be independently inflated and deflated.

[0010] Furthermore, a plurality of the first air holes are evenly distributed at the bottom of the flexible sealing cavity, so that the shape of the sealing airbag changes evenly during inflation and deflation; a plurality of the second air holes are evenly distributed at the bottom of the flexible supporting cavity, so that the shape of the supporting airbag changes evenly during inflation and deflation.

[0011] Furthermore, the sealing airbag and the supporting airbag are both rubber airbags with an outer ring plate, the sealing airbag and the supporting airbag are respectively installed on the valve core substrate through the outer ring plate, and a sealing ring is extruded between the outer ring plate and the valve core substrate.

[0012] Furthermore, the inflation and deflation system includes an air cylinder, an air cylinder, a three-way pipe and an air pressure sensor; the air cylinder is composed of a cylinder body and a piston arranged in the cylinder body through a piston rod; the air cylinder is docked at the tail end of the cylinder body and is push-pull connected with the piston rod, and the cylinder pushes and pulls the piston to perform inflation and deflation actions; the three-way pipe is docked at the head of the air cylinder, and its other two pipe ports are respectively docked with the flexible air pipe and the air pressure sensor.

[0013] Furthermore, a vent hole is provided on the cylinder, and the vent hole is provided near the tail of the cylinder.

[0014] Furthermore, a swing driving part is provided corresponding to the driving end of the swing shaft, the swing driving part is drivingly connected to the swing shaft, the valve core has a swing arm connected to the valve core substrate, and the valve core is installed on the swing shaft through the swing arm.

[0015] Furthermore, a brake and an angle sensor are provided at the non-driving end corresponding to the swing shaft;

[0016] The swing drive unit is a servo motor connected to the driving end of the swing shaft. When the servo motor is controlled to be stationary, the stationary servo motor and the brake form a double-axis end braking mechanism for simultaneously braking the double-axis ends of the swing shaft, so as to lock the valve core when it swings to a specific position;

[0017] The angle sensor is connected to the non-driving end of the swing shaft, and determines the position of the follow-up valve core by detecting the rotation angle of the swing shaft.

[0018] Beneficial effect: The sealing airbag and the supporting airbag of the present invention can be adjusted independently, so that the swing valve can more accurately control the sealing and supporting status while controlling the valve channel opening. This multi-dimensional control capability helps to achieve more precise flow regulation and pressure control, meet the requirements of swing valve control accuracy in different process flows, reduce dependence on traditional hard sealing structures, and reduce the risk of leakage caused by wear and aging of seals, so that it can adapt to more complex working conditions and the transportation needs of special media. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The overall structure of the swing valve of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 2 The overall structure of the swing valve of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 3 It is a schematic diagram of the axial structure of the swing valve of the present invention;

[0022] Figure 4 It is a structural diagram of the swing shaft, valve core, and charging and discharging system;

[0023] Figure 5 It is a structural schematic diagram of the state where the valve core swings to the valve channel position;

[0024] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of area A in the middle. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] like Figure 1 , Figure 2 as well as Figure 3 As shown, a double-sided flexible sealing swing valve includes a valve body 1, a swing shaft 2 and a valve core 3. The valve core 3 is set in the valve body 1 by the swing of the swing shaft 2 to switch positions between the valve cavity 4 and the valve channel 5 of the valve body 1, and the valve core 3 follows the swing shaft 2 to control the opening relative to the valve channel 5; the valve core 3 is composed of a valve core substrate 31 and a sealing airbag 32 and a supporting airbag 33 respectively arranged on both side surfaces of the valve core, and the sealing airbag 32 and the supporting airbag 33 can be changed in size by inflating and deflating air.

[0027] like Figure 4 , Figure 5 as well as Figure 6As shown, the valve seat on one side of the valve channel 5 is a sealing valve seat 51, and the inner end surface of the sealing valve seat 51 is a sealing surface a. The sealing airbag 32 is squeezed and fitted with the sealing valve seat 51, and the fitting force with the sealing surface a is adjusted by inflation and deflation to achieve sealing control, so that the swing valve of the present invention has the advantages of adjustable sealing force and good sealing adaptability. In terms of adjustable sealing force, this adjustability enables the swing valve to flexibly control the degree of sealing according to different working conditions and sealing requirements; for example, when conveying a medium with a higher pressure, the inflation volume of the sealing airbag 32 can be appropriately increased to enhance the sealing force and ensure that the medium will not leak; while in the case of conveying a medium with a lower pressure or when the sealing requirements are relatively less stringent, the inflation volume can be reduced, which can not only meet the sealing requirements, but also reduce the wear of the airbag and extend the service life; in terms of good sealing adaptability, the flexible characteristics of the sealing airbag 32 enable it to better adapt to the slight unevenness of the sealing surface a of the sealing valve seat 51. In actual applications, the valve seat surface may have some minor defects due to processing errors, wear and other reasons, and the sealing airbag can deform to a certain extent when under pressure, automatically fill these defects, achieve a tighter fit, effectively improve the reliability and stability of the seal, and reduce the risk of leakage of the fluid medium.

[0028] like Figure 4 , Figure 5 as well as Figure 6 As shown, the valve seat on the other side of the valve channel 5 is a support valve seat 52, and the inner end surface of the support valve seat 52 is a support surface b. The support airbag 33 is pressed and fitted with the support valve seat 52, and the support force on the support surface b is changed by inflation and deflation to achieve support control. In addition, the reaction force of the support airbag 33 acts axially on the valve core 3, so that the sealing airbag 32 increases the fit force with the sealing surface a under the action of this force, so that the swing valve has dynamic support adjustment capability and enhances the stability of the valve core. In terms of dynamic support adjustment, the support airbag 33 also has the inflation and deflation adjustment function, and can change the support force on the support surface b of the support valve seat 52 according to actual needs. During the operation of the swing valve, the position and force of the valve core 3 may change. By dynamically adjusting the inflation amount of the support airbag 33, the valve core 3 can always maintain a stable position and posture, avoiding problems such as valve core deformation and jamming due to insufficient or excessive support, and ensuring the normal operation and precise control of the swing valve. In terms of enhancing the stability of the valve core, the extrusion fit between the supporting airbag 33 and the supporting valve seat 52 provides a stable supporting force for the valve core 3. This supporting force not only acts on the valve core 3 in the axial direction, but also can limit the radial swing of the valve core 3 to a certain extent, thereby improving the stability of the valve core 3 during the swinging process. Especially when dealing with high-flow and high-pressure fluid media, the valve core 3 may be subjected to greater impact force and unbalanced force. Good supporting performance helps the valve core to resist these external forces, reduce vibration and wear, and extend the service life of the swing valve.

[0029] Therefore, the sealing airbag 32 and the supporting airbag 33 of the present invention can be adjusted independently, so that the swing valve can more accurately control the sealing and supporting states while controlling the valve channel opening. This multi-dimensional control capability helps to achieve more precise flow regulation and pressure control, meet the requirements of swing valve control accuracy in different process flows, reduce dependence on traditional hard sealing structures, and reduce the risk of leakage caused by wear and aging of seals, thereby being able to adapt to more complex working conditions and the transportation needs of special media.

[0030] like Figure 5 and Figure 6 As shown, grooves are respectively provided on the two side surfaces of the valve core substrate 31, and the sealing airbag 32 and the supporting airbag 33 centrally cover the corresponding grooves to form a flexible sealing cavity 3.2 and a flexible supporting cavity 3.3, which simplifies the structure and improves the convenience of airbag installation and maintenance. More specifically, the sealing airbag 32 and the supporting airbag 33 are both rubber sacs with an outer ring plate 34, and the sealing airbag 32 and the supporting airbag 33 are respectively installed on the valve core substrate 31 through the outer ring plate 34, and a sealing ring 35 is extruded between the outer ring plate 34 and the valve core substrate 31 to ensure air tightness. Two clamping cavities 3.1 are arranged inside the valve core substrate 31, the flexible sealing cavity 3.2 is communicated with the adjacent clamping cavity 3.1 through the first air hole 3.4 at the cavity bottom, and the flexible supporting cavity 3.3 is communicated with the adjacent clamping cavity 3.1 through the second air hole 3.5 at the cavity bottom; the outer side of the valve core substrate 31 is provided with air nozzles 3.6 corresponding to the clamping cavities 3.1, and the two air nozzles 3.6 are respectively connected to the inflation and deflation system 3.8 through the flexible air tube 3.7, and the sealing airbag 32 and the supporting airbag 33 each correspond to an inflation and deflation system 3.8, so that the sealing airbag 32 and the supporting airbag 33 can be independently inflated and deflated, thereby realizing independent inflation and deflation control of the sealing airbag 32 and the supporting airbag 33, and better and more accurately adapting to the sealing adjustment and the supporting adjustment.

[0031] In order to make the shape of the airbag change more uniformly during inflation and deflation and ensure the uniformity of sealing and support, in the present invention, Figure 3 and Figure 6 As shown, a plurality of the first air holes 3.4 are evenly distributed at the bottom of the flexible sealing cavity 3.2, so that the shape of the sealing airbag 32 changes evenly during inflation and deflation; a plurality of the second air holes 3.5 are evenly distributed at the bottom of the flexible supporting cavity 3.3, so that the shape of the supporting airbag 33 changes evenly during inflation and deflation, thereby ensuring the uniformity of sealing and support.

[0032] like Figure 4 , Figure 5 and Figure 6As shown, the inflation and deflation system 3.8 includes an air cylinder 80, an air cylinder 81, a three-way pipe 82 and an air pressure sensor 83; the air cylinder 80 is composed of a cylinder body 801 and a piston 803 arranged in the cylinder body 801 through a piston rod 802; the air cylinder 81 is docked at the tail of the cylinder body 801 and is push-pull connected with the piston rod 802, and the cylinder 81 pushes and pulls the piston 803 to perform inflation and deflation actions; the three-way pipe 82 is docked at the head of the air cylinder 80, and its other two pipe ports are respectively docked with the flexible air tube 3.7 and the air pressure sensor 83. The inflation and deflation system 3.8 adopts the power coordination of the air cylinder 80 and the air cylinder 81, which makes it easier to control the inflation and deflation of the airbag, and the control is more accurate. It cooperates with the air pressure sensor 83 to achieve accurate airbag inflation and deflation control and improve reliability.

[0033] like Figure 5 As shown, a vent hole 85 is provided on the cylinder 801, and the vent hole 85 is provided near the tail of the cylinder 801 to ensure the balance of air pressure inside the cylinder 80 and improve stability and response speed.

[0034] like Figure 1 and Figure 4 As shown, a swing drive unit 10 is provided corresponding to the driving end of the swing shaft 2, the swing drive unit 71 is connected to the swing shaft 2, the valve core 3 has a swing arm 36 connected to the valve core substrate 31, and the valve core 3 is installed on the swing shaft 2 through the swing arm 36. Figure 2 and Figure 4 As shown, a brake 37 and an angle sensor 38 are provided corresponding to the non-driving end of the swing shaft 2; the swing driving part 10 is a servo motor connected to the driving end of the swing shaft 2. When the servo motor is controlled to be stationary, the stationary servo motor and the brake 37 constitute a dual-axis end braking mechanism for simultaneously braking the dual-axis ends of the swing shaft 2, so as to lock the valve core 3 when the valve core 3 swings to a specific position; the angle sensor 38 is connected to the non-driving end of the swing shaft 2, and determines the position of the follow-up valve core 3 by detecting the rotation angle of the swing shaft 2. The combination of the servo motor and the brake 37 realizes the dual-axis end locking of the valve core 3, ensures the stability of the valve core 3 at a specific position, improves safety and reliability, and the angle sensor 38 monitors the angle of the swing shaft 2 in real time, ensures the precise control of the position of the valve core 3, and improves the automation level and operation accuracy. Among them, the brake 37 can be selected as a holding brake or an electromagnetic brake or other mechanism with a braking function.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A double-sided flexible sealing swing valve, comprising a valve body (1), a swing shaft (2) and a valve core (3), wherein the valve core (3) is arranged in the valve body (1) by swinging the swing shaft (2) so as to switch positions between a valve cavity (4) and a valve channel (5) of the valve body (1), and the valve core (3) follows the swing shaft (2) to control the opening relative to the valve channel (5); Features: The valve core (3) is composed of a valve core substrate (31) and a sealing airbag (32) and a supporting airbag (33) respectively arranged on two side surfaces of the valve core, and the sealing airbag (32) and the supporting airbag (33) can both be changed in size by inflating and deflating air; The valve seat on one side of the valve channel (5) is a sealing valve seat (51), the inner end surface of the sealing valve seat (51) is a sealing surface (a), the sealing airbag (32) is pressed and fitted with the sealing valve seat (51), and the fitting force with the sealing surface (a) is adjusted by inflation and deflation to achieve sealing control; The valve seat on the other side of the valve channel (5) is a support valve seat (52), the inner end surface of the support valve seat (52) is a support surface (b), the support airbag (33) is pressed and fitted with the support valve seat (52), and the support force on the support surface (b) is changed by inflation and deflation to achieve support control; The reaction force of the supporting airbag (33) acts axially on the valve core (3), so that the sealing airbag (32) increases the contact force with the sealing surface (a) under the action of the force.

2. A double-sided flexible sealing swing valve according to claim 1, characterized in that: The two side surfaces of the valve core substrate (31) are respectively provided with grooves, and the sealing airbag (32) and the supporting airbag (33) centrally cover the corresponding grooves to form a flexible sealing cavity (3.2) and a flexible supporting cavity (3.3); two clamping cavities (3.1) are arranged inside the valve core substrate (31), the flexible sealing cavity (3.2) is connected to the adjacent clamping cavity (3.1) through the first air hole (3.4) at the cavity bottom, and the flexible supporting cavity (3.3) is connected to the adjacent clamping cavity (3.1) through the first air hole (3.4) at the cavity bottom. The two air holes (3.5) are in communication with the adjacent clamping cavities (3.1); the outer side of the valve core substrate (31) is provided with air nozzles (3.6) corresponding to the clamping cavities (3.1); the two air nozzles (3.6) are respectively connected to an inflation and deflation system (3.8) through a flexible air tube (3.7); the sealing airbag (32) and the supporting airbag (33) each correspond to an inflation and deflation system (3.8), so that the sealing airbag (32) and the supporting airbag (33) can be independently inflated and deflated.

3. A double-sided flexible sealing swing valve according to claim 2, characterized in that: A plurality of the first air holes (3.4) are evenly distributed at the bottom of the flexible sealing cavity (3.2), so that the shape of the sealing airbag (32) changes evenly during inflation and deflation; and a plurality of the second air holes (3.5) are evenly distributed at the bottom of the flexible supporting cavity (3.3), so that the shape of the supporting airbag (33) changes evenly during inflation and deflation.

4. A double-sided flexible sealing swing valve according to claim 2, characterized in that: The sealing airbag (32) and the supporting airbag (33) are both rubber bladders having an outer ring plate (34); the sealing airbag (32) and the supporting airbag (33) are respectively mounted on the valve core substrate (31) via the outer ring plate (34); and a sealing ring (35) is extruded between the outer ring plate (34) and the valve core substrate (31).

5. A double-sided flexible sealing swing valve according to claim 2, characterized in that: The inflation and deflation system (3.8) comprises an air cylinder (80), an air cylinder (81), a three-way pipe (82) and an air pressure sensor (83); the air cylinder (80) is composed of a cylinder body (801) and a piston (803) arranged in the cylinder body (801) via a piston rod (802); the air cylinder (81) is docked at the rear end of the cylinder body (801) and is push-pull connected to the piston rod (802), and the air cylinder (81) pushes and pulls the piston (803) to perform inflation and deflation actions; the three-way pipe (82) is docked at the head of the air cylinder (80), and its other two pipe ports are respectively docked with the flexible air pipe (3.7) and the air pressure sensor (83).

6. A double-sided flexible sealing swing valve according to claim 5, characterized in that: The cylinder (801) is provided with a vent hole (85), and the vent hole (85) is arranged close to the rear of the cylinder (801).

7. A double-sided flexible sealing swing valve according to claim 5, characterized in that: A swing drive unit (10) is provided at the driving end corresponding to the swing shaft (2); the swing drive unit (71) is drivingly connected to the swing shaft (2); the valve core (3) has a swing arm (36) connected to the valve core substrate (31); and the valve core (3) is mounted on the swing shaft (2) via the swing arm (36).

8. A double-sided flexible sealing swing valve according to claim 7, characterized in that: A brake (37) and an angle sensor (38) are provided at the non-driving end corresponding to the swing shaft (2); The swing drive unit (10) is a servo motor connected to the driving end of the swing shaft (2). When the servo motor is controlled to be stationary, the stationary servo motor and the brake (37) form a double-axis end braking mechanism for simultaneously braking the double-axis ends of the swing shaft (2), so as to lock the valve core (3) when it swings to a specific position; The angle sensor (38) is connected to the non-driving end of the swing shaft (2) and determines the position of the follow-up valve core (3) by detecting the rotation angle of the swing shaft (2).

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