Integrated flow regulating valve based on double-cavity throttling structure

Abstract

The invention relates to the technical field of regulating valves, and discloses an integrated flow regulating valve based on a double-cavity throttling structure. A valve cavity is formed in the valve body in the axial direction of the valve body, a ring block is fixedly connected into the valve cavity, a flow dividing channel communicated with the valve cavity is formed in the ring block in the radial direction of the ring block, a flow guiding channel is formed in the valve body, one end of the flow guiding channel is communicated with the flow dividing channel, and the other end of the flow guiding channel is communicated with the valve cavity. Therefore, a complete medium output flow path is formed. The integrated flow regulating valve based on the double-cavity throttling structure can effectively solve the problems that in the prior art, when a medium flows through a throttling gap in a single valve cavity, the flow speed is sharply increased, so that the pressure of a local area in the valve cavity is lower than the saturated vapor pressure of the medium, strong impact pressure is formed, the impact can continuously act on components such as a valve element and the inner wall of the valve cavity, and the service life of the valve element is prolonged. Therefore, the problems that the service life of parts is shortened, and the throttling gap is increased abnormally are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of regulating valve, in particular to an integrated flow regulating valve based on double-cavity throttling structure. BACKGROUND

[0002] The flow regulating valve is a key equipment in fluid conveying system to ensure stable working condition and optimize energy consumption, which is widely used in petroleum and chemical industry, water treatment, energy transportation, industrial process control and other fields.

[0003] In the prior art, the integrated flow regulating valve has become the mainstream choice for medium and low pressure fluid systems due to its compact structure, convenient assembly and small floor area, but the throttling structure of the integrated flow regulating valve on the market currently adopts a "single-cavity single throttling" design, that is, the throttling and flow regulation of the medium are realized only by the cooperation of the valve core and the valve seat in the single valve cavity.

[0004] Under the single-cavity throttling mode, when the medium flows through the throttling gap in the single valve cavity, the flow rate will increase sharply, causing the pressure in the local area of the valve cavity to be lower than the saturated vapor pressure of the medium, and a large amount of bubbles are easily generated. The bubbles will rapidly break when flowing to the high pressure area, forming a strong impact pressure (i.e. cavitation phenomenon), which will continuously act on the valve core, the inner wall of the valve cavity and other components, causing surface erosion and peeling, which not only shortens the service life of the components, but also causes the throttling gap to abnormally increase, further reducing the flow regulating precision. SUMMARY

[0005] In view of the above shortcomings of the prior art, the present application provides an integrated flow regulating valve based on double-cavity throttling structure, which can effectively solve the problem that in the prior art, when the medium flows through the throttling gap in the single valve cavity, the flow rate will increase sharply, causing the pressure in the local area of the valve cavity to be lower than the saturated vapor pressure of the medium, forming a strong impact pressure, which will continuously act on the valve core, the inner wall of the valve cavity and other components, causing surface erosion and peeling, which not only shortens the service life of the components, but also causes the throttling gap to abnormally increase.

[0006] To achieve the above purpose, the present application is realized by the following technical scheme: The present application provides an integrated flow regulating valve based on double-cavity throttling structure, comprising: a valve body; The valve body is provided with a valve cavity along its axial direction, and a ring block is fixedly connected in the valve cavity, the ring block is provided with a shunt passage communicated with the valve cavity along its radial direction, and the shunt passage is provided with a plurality of and is distributed in a circumferential array along the central axis of the ring block; The valve body is provided with a flow guide channel, one end of the flow guide channel is communicated with the flow distribution channel, and the other end of the flow guide channel is communicated with the valve cavity to form a complete medium output flow path. The valve cavity is provided with a valve rod for medium flow adjustment.

[0007] Further, the valve body is composed of two detachable cylindrical housings, and a sealing gasket is arranged between the abutting surfaces of the two cylindrical housings to realize sealing connection of the two, so as to form a complete and sealed valve body structure.

[0008] Further, the valve rod comprises a shut-off rod threadedly connected to the upper part of the valve cavity, the circumferential outer surface of the shut-off rod is provided with a through hole, and the inside of the shut-off rod is provided with an output channel for medium output. The output channel comprises a diffusion section, a throat section and a contraction section which are communicated with each other, and the contraction section is communicated with the through hole.

[0009] Further, the valve cavity is fixedly connected with a diaphragm on the side close to the ring block, and the diaphragm is connected with the bottom of the shut-off rod through a reset spring arranged on the top of the diaphragm. The diaphragm is detachably installed with a valve core through a connecting rod arranged on the bottom of the diaphragm, the valve core is designed in a conical shape, and the outer diameter of the valve core is smaller than the inner diameter of the valve cavity.

[0010] Further, the circumferential outer surface of the shut-off rod is provided with an annular groove close to the through hole, the bottom of the annular groove is provided with a conical surface, and the annular groove is provided with a sealing ring.

[0011] Further, the annular groove is slidably connected with an inner support block which is fitted with the circumferential outer surface of the shut-off rod, the bottom of the inner support block is designed in a conical shape, and the inner support block is connected with the bottom of the annular groove through a compression spring arranged in the inner support block.

[0012] Further, the valve body is provided with a transmission hole communicated with the valve cavity close to the shut-off rod, and the transmission hole is arranged in a circumferential array along the central axis of the valve body.

[0013] The technical scheme provided by the application has the following beneficial effects compared with the prior art: After the medium enters the valve body, it first passes through the annular flow space formed by the "valve core-valve cavity" to complete the preliminary flow stabilization, so as to avoid the direct impact of the medium on a single area. The medium after flow stabilization passes through the multiple groups of flow channels distributed in a circumferential array on the ring block to realize "single flow splitting", so as to disperse the original concentrated medium kinetic energy into multiple flow beams, reduce the flow velocity of a single flow beam, avoid the local area pressure being lower than the medium saturated vapor pressure to generate bubbles, and further split the medium into two routes: one route enters the upper part of the valve cavity through the flow guide channel, and the other route enters the sealed space enclosed by the diaphragm and the ring block. The medium pressure in the sealed space gradually increases with filling, drives the diaphragm to reset, balances the overall pressure distribution in the valve cavity, prevents the bubbles from flowing to the high-pressure area to break and generate impact pressure, and inhibits cavitation from "source bubble inhibition" and "pressure balance bubble breakage prevention".

[0014] The medium flows into the inner support block top space through the transmission hole. When the medium pressure overcomes the elastic resistance of the compression spring, the inner support block is driven to displace along the axis downward. The inner support block cooperates with the tapered surface of the ring groove to convert the axial displacement of the inner support block into the radial extrusion force of the sealing ring, so that the sealing ring is elastically deformed, the outer circumferential surface of the sealing ring is tightly attached to the inner wall of the valve cavity, the radial gap is filled, the higher the medium pressure is, the stronger the radial extrusion force is, and the higher the sealing degree is (high-pressure leakage resistance). Under low pressure conditions, the compression spring is not excessively compressed, the sealing ring is less deformed, the friction and wear between the sealing ring and the inner wall of the valve cavity are reduced (prolonging the service life of the sealing ring), and "pressure self-adaptive sealing" is realized. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0016] Figure 1 It is a three-dimensional structure schematic diagram of the embodiment of the present application; Figure 2 It is a three-dimensional separated structure schematic diagram of the valve body and the valve rod of the embodiment of the present application; Figure 3 It is a three-dimensional separated structure schematic diagram of the valve body of the embodiment of the present application; Figure 4 It is a sectional structure schematic diagram of the intercepting rod of the embodiment of the present application; Figure 5 It is a sectional structure schematic diagram of the valve body of the embodiment of the present application; Figure 6 It is a three-dimensional structure schematic diagram of the embodiment of the present application Figure 5 It is a structure schematic diagram of the local amplification at A in the embodiment of the present application; Figure 7 It is a three-dimensional structure schematic diagram of the embodiment of the present applicationFigure 5 Structure schematic diagram of local amplification at B; Figure 8 Schematic diagram of three-dimensional state transformation of the valve core of the embodiment of the present application.

[0017] The labels in the figure respectively represent: 1, valve body; 11, valve cavity; 111, flow guide channel; 12, ring block; 121, shunt channel; 13, transmission hole; 2, valve rod; 21, intercepting rod; 211, ring groove; 212, sealing ring; 213, inner support block; 22, through hole; 23, output channel; 231, diffusion section; 232, throat; 233, contraction section; 24, diaphragm; 25, return spring; 26, valve core. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0019] The present application will be further described below in combination with the embodiments. EMBODIMENT

[0020] Please refer to Figures 1-8 The present application provides a technical scheme: an integrated flow regulating valve based on a double-cavity throttling structure, comprising: A valve body 1; The valve body 1 is provided with a valve cavity 11 along its axial direction, and the valve cavity 11 is fixedly connected with a ring block 12, the ring block 12 is provided with a shunt channel 121 along its radial direction and in communication with the valve cavity 11, and the shunt channel 121 is provided with a plurality of and arranged in a circular array along the central axis of the ring block 12; The valve body 1 is provided with a flow guide channel 111, one end of the flow guide channel 111 is in communication with the shunt channel 121, and the other end of the flow guide channel 111 is in communication with the valve cavity 11, so as to form a complete medium output flow path; Among them, the valve cavity 11 is provided with a valve rod 2 for medium flow regulation.

[0021] The valve body 1 is composed of two detachably connected cylindrical shells, and a sealing gasket is arranged between the abutting surfaces of the two cylindrical shells for sealing connection, so as to form a complete and sealed valve body 1 structure.

[0022] The valve rod 2 comprises an intercepting rod 21 threadedly connected to the upper part of the valve cavity 11, the circumferential outer surface of the intercepting rod 21 is provided with a through hole 22, and the inside of the intercepting rod 21 is provided with an output channel 23 for medium output; The output channel 23 includes a diffuser section 231, a throat 232, and a constriction section 233 that are interconnected, and the constriction section 233 is interconnected with the through hole 22.

[0023] A diaphragm 24 is fixedly connected to the side of the valve chamber 11 near the ring block 12. The diaphragm 24 is connected to the bottom of the throttling rod 21 through a return spring 25 set on its top. The diaphragm 24 is detachably mounted with the valve core 26 via a connecting rod located at its bottom. The valve core 26 has a tapered design, and its outer diameter is smaller than the inner diameter of the valve cavity 11.

[0024] A ring groove 211 is provided on the outer circumference of the flow-stopping rod 21 near the through hole 22. The bottom of the ring groove 211 is provided with a tapered surface, and a sealing ring 212 is provided inside the ring groove 211.

[0025] An inner support block 213 is slidably connected inside the annular groove 211 and fits against the outer circumference of the throttling rod 21. The bottom of the inner support block 213 is tapered. The inner support block 213 is connected to the bottom of the annular groove 211 by a compression spring inside it.

[0026] A transmission channel 13 is provided inside the valve body 1 near the throttle rod 21, which communicates with the valve cavity 11. Multiple transmission channels 13 are provided and are arranged in a circular array along the central axis of the valve body 1.

[0027] The working principle and advantages of this integrated flow control valve based on a dual-chamber throttling structure: Assemble and connect the threaded interface at the bottom of the valve body 1 to the external equipment to be connected, completing the overall installation and fixation of the flow control valve and the external equipment. In traditional flow control valves, the throttling structure often uses a single valve chamber 11 in conjunction with the valve core 26 to achieve throttling and flow regulation of the medium. When the medium flows through the throttling gap in the single valve chamber 11, the flow velocity will increase sharply, causing cavitation and resulting in an abnormal increase in the throttling gap.

[0028] In this invention, after the valve body 1 is installed with the external equipment, the operator applies a rotational driving force to the throttling rod 21 in the valve stem 2. Because the throttling rod 21 is threadedly engaged with the inner wall of the valve cavity 11, the throttling rod 21 undergoes linear displacement along its axial direction under the action of the threaded transmission. When the throttling rod 21 moves downward along its axis, it applies an axial compressive force to the diaphragm 24 through the return spring 25, causing the diaphragm 24 to undergo elastic deformation within the valve cavity 11. This elastic deformation is transmitted to the valve core 26 through the connecting rod at the bottom of the diaphragm 24, driving the valve core 26 to move synchronously along its axial direction, thereby forming a preset flow gap between the valve core 26 and the ring block 12, thus opening the diversion channel 121.

[0029] The valve body 1 is connected by two cylindrical shells in a detachable manner (such as bolt connection), and a sealing gasket is arranged between the abutting surfaces. When the internal components need to be repaired (such as replacing the worn valve core 26 and the aged diaphragm 24), only the connection structure of the two cylindrical shells needs to be disassembled to directly contact the internal components, thereby solving the problem of difficult replacement of the internal components of the traditional valve body 1.

[0030] The medium in the external device enters the inside of the valve cavity 11 through the lower threaded interface of the valve body 1. Since the outer diameter of the valve core 26 is smaller than the inner diameter of the valve cavity 11, the medium entering the valve cavity 11 flows along the outer peripheral edge region of the valve core 26 through the annular flow-through space formed by the two, and flows into the shunt passage 121. The medium flowing into the shunt passage 121 further forms two flow beams: one medium is transported to the upper region of the valve cavity 11 through the flow guide passage 111 communicated with the shunt passage 121; and the other medium enters the sealed space enclosed by the diaphragm 24 and the ring block 12.

[0031] The valve core 26 adopts a conical design, and the outer diameter is smaller than the inner diameter of the valve cavity 11, forming an annular flow-through space of “valve core 26 outer periphery-valve cavity 11 inner wall”. After the medium enters the valve cavity 11, it flows along the outer peripheral inclined surface of the conical valve core 26. The conical structure can guide the medium to uniformly diffuse in the direction of the shunt passage 121 of the ring block 12, avoid the medium directly impacting the ring block 12 or a certain specific shunt passage 121, reduce the local component wear, and buffer the impact force when the medium enters, so that the medium flow rate is gradually stabilized before entering the shunt passage 121, avoiding flow state disorder caused by sudden change of flow rate, and laying a foundation for uniform shunting of the subsequent double-cavity throttling. The valve core 26 is detachably connected (such as threaded connection or buckle connection) with the diaphragm 24 through the connecting rod. When the characteristics of the conveyed medium change, the valve core 26 can be disassembled and replaced with a valve core 26 of a suitable material. When the flow range of the working condition is adjusted, a valve core 26 with different taper can be replaced. The detachable design makes it unnecessary to replace the entire regulating valve due to the adaptation of the valve core 26, and only the valve core 26 needs to be replaced, thereby reducing the maintenance cost and improving the versatility of the equipment for different working conditions.

[0032] As the medium continuously flows into the sealed space enclosed by the diaphragm 24 and the ring block 12, the pressure of the medium in the space gradually rises. When the pressure value reaches and exceeds the elastic deformation threshold of the diaphragm 24, the diaphragm 24 restores to the initial shape under the action of the elastic restoring force of itself.

[0033] In this process, after the medium enters the valve cavity 11, it first passes through the annular gap between the valve core 26 and the valve cavity 11 to preliminarily stabilize the flow, and then passes through the multiple circumferential array of the ring block 12 to realize "single flow splitting" to avoid the medium accelerating in a single area. After the flow splitting, the medium is divided into two paths: one path enters the upper part of the valve cavity 11 through the flow guide channel 111, and the other path enters the sealed space enclosed by the diaphragm 24 and the ring block 12. The double-path flow splitting disperses the kinetic energy of the medium, reduces the local flow rate, avoids the generation of "local low-pressure bubbles", and gradually increases the pressure in the sealed space enclosed by the diaphragm 24 and the ring block 12 until it pushes the diaphragm 24 to reset. This process further balances the pressure distribution in the valve cavity 11, prevents "high-pressure area bubble burst impact", reduces the erosion and peeling of the valve core 26, ring block 12 and valve cavity 11 inner wall, and significantly prolongs the service life of the core components.

[0034] The medium transported to the upper area of the valve cavity 11 through the flow guide channel 111 enters the through hole 22 on the circumferential outer surface of the intercepting rod 21 and is guided into the pre-set output channel 23 inside the intercepting rod 21. The medium flows through the contraction section 233, the throat section 232 and the diffusion section 231 in the output channel 23 in sequence and is finally guided out of the valve body 1, completing the overall delivery process of the medium.

[0035] In this process, the contraction section 233 has a gradually changing structure with a gradually decreasing cross-sectional area along the flow direction of the medium and is directly connected to the through hole 22 to form an "entry transition section" of the medium entering the flow channel. The gradually changing cross-section of the contraction section 233 can "converge and straighten" the dispersed medium flow guided from the through hole 22, eliminate the vortex generated by the radial flow when the medium enters the flow channel, and form a uniform flow beam along the axis direction of the flow channel, laying a stable flow basis for the subsequent throttling and pressure stabilization of the throat section 232.

[0036] The throat section 232 is the section with the smallest cross-sectional area in the flow channel and is located between the contraction section 233 and the diffusion section 231 to form the "smallest flow cross-section" of the flow channel. The narrow-diameter structure of the throat section 232 can maintain the stable flow rate of the medium in the flow channel, and at the same time, a stable pressure difference is formed before and after the throat section 232 through "throttling effect". This pressure difference can offset part of the pressure fluctuation of the upstream medium, reducing the influence of pressure fluctuation on the downstream diffusion section 231 and output channel 23.

[0037] The diffusion section 231 has a gradually changing structure with a gradually increasing cross-sectional area along the flow direction of the medium and forms an "exit transition section" of the medium flowing out of the flow channel. Through the "speed reduction-pressure increase" effect, the diffusion section 231 ensures that the pressure of the medium flowing out of the diffusion section 231 has recovered to a level higher than the saturation pressure of the medium, thereby fundamentally inhibiting the generation and rupture of bubbles and avoiding the erosion of the output channel 23, intercepting rod 21 and other components by cavitation, prolonging the service life of the components.

[0038] In the use of the intercepting rod 21, a conventional sealing structure is used to seal between the intercepting rod 21 and the valve cavity 11, that is, a straight-wall ring groove 211 is formed on the outer periphery of the intercepting rod 21, and a single sealing element such as an O-ring or a sealing gasket is embedded in the ring groove 211, and the sealing effect completely depends on the elastic deformation of the sealing element. When the intercepting rod 21 axially displaces, the fitting position of the sealing element and the inner wall of the valve cavity 11 is easy to deviate, which causes the sealing gap to increase, and the deformation of the sealing element itself cannot follow the displacement adjustment, which is easy to cause leakage problems. Moreover, the sealing force of the sealing element is derived from the initial compression deformation of the sealing element during assembly, and the deformation amount of the sealing element is easy to decay with the passage of time, which causes the sealing force to decrease.

[0039] In the present application, when the medium enters the upper region of the valve cavity 11 through the flow guide channel 111, part of the medium flows into the top space of the inner support block 213 through the pre-set transmission hole 13. Under the initial working condition, the compression spring inside the inner support block 213 is in a state of no external force load, maintaining the initial free form. As the medium continues to flow into the top space of the inner support block 213, the static pressure of the medium in the space gradually accumulates and rises until the pressure value reaches and exceeds the elastic resistance threshold of the compression spring.

[0040] When the medium pressure in the top space of the inner support block 213 overcomes the elastic resistance threshold of the compression spring, the pressure difference forms a driving force in the axial direction of the inner support block 213, driving the inner support block 213 to linearly displace downward along its axis.

[0041] The inner wall of the ring groove 211 of the valve body 1 is pre-set with a tapered surface, and the sealing ring 212 is embedded in the ring groove 211 with an elastic material. The material can be selected according to the characteristics of the medium, such as selecting a corrosion-resistant material for corrosive medium and selecting a high-temperature-resistant material for high-temperature medium, to adapt to different working condition requirements. The tapered surface of the outer periphery of the inner support block 213 is designed to be tapered downward along its axis. As the inner support block 213 displaces downward, the tapered surface of the inner support block 213 cooperates with the tapered surface of the ring groove 211 to form a cooperative extrusion structure, which converts the axial displacement of the inner support block 213 into a radial extrusion force on the sealing ring 212. The radial extrusion force causes the sealing ring 212 to elastically deform controllably, so that the outer periphery of the sealing ring 212 tightly fits with the inner wall of the valve cavity 11, directly filling the radial gap between the intercepting rod 21 and the valve cavity 11, and finally completing the sealing cooperation between the intercepting rod 21 and the valve cavity 11.

[0042] Compared with the conventional passive sealing which depends on the elasticity of the sealing element alone, the present structure actively drives the sealing ring 212 to deform by the medium pressure, and the higher the medium pressure, the stronger the radial extrusion force, and the higher the fitting degree of the sealing ring 212 and the inner wall of the valve cavity 11. The risk of leakage of high-pressure medium can be effectively resisted. Under low-pressure working conditions, the compression spring is not compressed too much, and the deformation of the sealing ring 212 is small, which can reduce the friction and wear between the sealing element and the inner wall of the valve cavity 11. Under high-pressure working conditions, the extrusion force is automatically strengthened to ensure the sealing effect, balance the "sealing reliability" and "sealing element life", and prolong the replacement cycle of the sealing ring 212.

[0043] The application adopts the valve stem 2 and the valve body 1, and has the following advantages: The first advantage is that after the medium enters the valve body 1, it first passes through the annular flow space formed by the valve core 26 and the valve cavity 11 to complete preliminary flow stabilization, so as to avoid direct impact on a single area. The medium after flow stabilization is implemented with single flow distribution through the multiple groups of flow channels 121 distributed in a circular array on the ring block 12, so as to disperse the original concentrated medium kinetic energy into multiple flow beams, reduce the flow rate of a single flow beam, avoid the local area pressure being lower than the medium saturated vapor pressure to generate bubbles, and further divide the medium after flow distribution into two paths: one path enters the upper part of the valve cavity 11 through the flow guide channel 111, and the other path enters the sealed space enclosed by the diaphragm 24 and the ring block 12. The medium pressure in the sealed space gradually increases with filling, drives the diaphragm 24 to reset, balances the overall pressure distribution in the valve cavity 11, prevents bubbles from flowing to the high-pressure area to break and generate impact pressure, and inhibits cavitation from two aspects of “bubble inhibition from the source” and “bubble breakage prevention by pressure balance”.

[0044] The second advantage is that the outer periphery of the intercepting rod 21 is provided with a ring groove 211 with a tapered surface, and the ring groove 211 is internally provided with a sealing ring 212, an inner support block 213 and a compression spring. The valve body 1 is provided with a circular array of transmission channels 13 near the intercepting rod 21. The medium flows into the top space of the inner support block 213 through the transmission channels 13. When the medium pressure overcomes the elastic resistance of the compression spring, the inner support block 213 is driven to displace downward along the axis. The inner support block 213 cooperates with the tapered surface of the ring groove 211 to convert the axial displacement of the inner support block 213 into a radial extrusion force on the sealing ring 212, so that the sealing ring 212 elastically deforms controllably. The outer periphery of the sealing ring 212 is tightly attached to the inner wall of the valve cavity 11 to fill the radial gap. The higher the medium pressure, the stronger the radial extrusion force, and the higher the sealing degree (high-pressure leakage resistance). The compression spring is not excessively compressed under low-pressure conditions, the deformation of the sealing ring 212 is small, the friction and wear between the sealing ring 212 and the inner wall of the valve cavity 11 are reduced (the service life of the sealing ring 212 is prolonged), and “pressure self-adaptive sealing” is realized.

[0045] The third advantage is that a plurality of transmission channels 13 are arranged in the valve body 1 near the intercepting rod 21 and distributed in a circular array along the central axis of the valve body 1. The medium uniformly flows into the top space of the inner support block 213 through the circular array of transmission channels 13, so that the medium pressure on the top of the inner support block 213 is uniformly distributed in the circumferential direction, avoiding the displacement of the inner support block 213 due to excessive pressure in a certain direction. The uniform force on the inner support block 213 ensures its stable axial displacement, and further makes the radial extrusion force on the sealing ring 212 uniform in the circumferential direction, avoiding leakage caused by local poor adhesion of the sealing ring 212, and ensuring stable operation of the active sealing structure.

[0046] The fourth advantage is that when the medium enters the sealed space of the diaphragm 24 and the ring block 12, the pressure gradually increases and exceeds the elastic deformation threshold of the diaphragm 24, the diaphragm 24 resets under the action of the elastic restoring force, drives the valve core 26 to fine tune through the connecting rod, balances the flow gap of the "valve core 26-ring block 12", the structure can dynamically respond to the pressure change in the valve cavity 11, offsets part of the pressure fluctuation influence on the flow through the diaphragm 24 reset, avoids the flow from being greatly fluctuated due to the sudden rise and fall of the pressure, and improves the adjustment accuracy.

[0047] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. An integrated flow regulating valve based on a dual chamber throttling structure, characterized in that, Include: Valve body (1); The valve body (1) is provided with a valve cavity (11) along its axial direction, and a ring block (12) is fixedly connected in the valve cavity (11). The ring block (12) is provided with a shunt passage (121) along its radial direction, which is connected with the valve cavity (11). The shunt passage (121) is provided with a plurality of and is distributed in a circular array along the central axis of the ring block (12). The valve body (1) is provided with a flow guide passage (111), one end of which is connected with the shunt passage (121), and the other end is connected with the valve cavity (11) to form a complete medium output flow path. Wherein, the valve cavity (11) is provided with a valve rod (2) for adjusting the flow of medium.

2. The integrated flow regulating valve based on double-cavity throttling structure according to claim 1, characterized in that: The valve body (1) is composed of two detachable cylindrical shells, and a sealing gasket is arranged between the abutting surfaces of the two cylindrical shells to realize the sealing connection of the two, so as to form a complete and sealed valve body (1) structure.

3. The integrated flow regulating valve based on double-cavity throttling structure according to claim 1, characterized in that: The valve rod (2) includes a cut-off rod (21) screwed to the upper part of the valve cavity (11). The circumferential outer surface of the cut-off rod (21) is provided with a through hole (22). The inner part of the cut-off rod (21) is provided with an output passage (23) for medium output. The output passage (23) includes a diffusion section (231), a throat (232) and a contraction section (233) which are connected with each other. The contraction section (233) is connected with the through hole (22).

4. The integrated flow regulating valve based on double-cavity throttling structure according to claim 1, characterized in that: The valve cavity (11) is fixedly connected with a diaphragm (24) near the ring block (12). The diaphragm (24) is connected with the bottom of the cut-off rod (21) through the reset spring (25) arranged at the top of the diaphragm (24). The diaphragm (24) is detachably installed with a valve core (26) through the connecting rod arranged at the bottom of the diaphragm (24). The valve core (26) is designed in a conical shape, and the outer diameter of the valve core (26) is smaller than the inner diameter of the valve cavity (11).

5. The integrated flow regulating valve based on double-cavity throttling structure according to claim 3, characterized in that: The circumferential outer surface of the cut-off rod (21) is provided with a ring groove (211) near one side of the through hole (22). The bottom of the ring groove (211) is provided with a conical surface. The ring groove (211) is provided with a sealing ring (212).

6. The integrated flow regulating valve based on double-cavity throttling structure according to claim 5, characterized in that: The ring groove (211) is slidably connected with an inner support block (213) which is fitted with the circumferential outer surface of the cut-off rod (21). The bottom of the inner support block (213) is designed in a conical shape. The inner support block (213) is connected with the bottom of the ring groove (211) through the compression spring arranged in the inner support block (213).

7. The integrated flow regulating valve based on double-cavity throttling structure according to claim 1, characterized in that: The valve body (1) is provided with a transmission hole (13) which is connected with the valve cavity (11) and is arranged near the cut-off rod (21). The transmission hole (13) is provided with a plurality of and is distributed in a circular array along the central axis of the valve body (1).

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