Adaptive throttle valve and its components

Abstract

An adaptive throttle valve includes at least a valve body, a valve needle, a valve needle spring, an adjusting spring, and an adjusting screw. The valve body is an integrated structural component provided with a valve seat or a combined structure including at least a valve seat and a tubular component. One end of the valve needle spring is provided on the valve needle, and the other end is provided on the valve seat. The adjusting spring is provided between the valve needle and the adjusting screw. The adjusting screw is used to adjust the initial position of the valve needle. The valve needle can move axially in the valve body under the action of force to close or open the flow area of ​​the valve port. The adaptive throttle valve of the present invention uses variable flow throttling. When the fluid passes through the throttle valve hole on the valve seat, the valve port is opened or closed under the dynamic action of the valve needle spring, the adjusting spring, and the fluid pressure as the flow rate of the incoming fluid changes, and the force on the valve needle will be rebalanced. In addition, due to the damping effect of the springs at both ends of the valve needle, the valve needle oscillates less, reduces noise, and has high reliability, which can simplify the control problem of the throttling mechanism and automate simple problems.

Description

Technical Field

[0001] The invention relates to the fields of fluid flow control and refrigeration technology, and relates to a throttling mechanism, in particular to an adaptive throttling valve and an adaptive throttling valve assembly. Background Art

[0002] In the prior art, the throttling device between the evaporator and the condenser of the refrigeration equipment is generally an adjustable flow element and an unadjustable flow element. The adjustable flow element is such as an electronic expansion valve, and the unadjustable flow element is such as a capillary tube, a throttling tube (valve). The current adjustable flow element has a high cost, especially the electronic expansion valve needs to be equipped with a corresponding control strategy, and it is easy to get stuck and has low reliability. The throttling method of the unadjustable flow element can only provide a throttling effect of a fixed length or a fixed opening, and the throttling effect cannot be adjusted according to the flow rate and the pressure changes on both sides. The adaptability of the throttling condition is poor, but the cost is low, and it is still widely used in refrigeration equipment. However, in the air-conditioning system where the throttling valve is used as the throttling device, the throttling valve changes the throttling direction by the conversion of the high and low pressures of the system. However, in actual use, the valve needle of the throttling valve will get stuck, affecting the normal operation of the air conditioner. In addition, the valve needle of the throttling valve is prone to vibration during the axial movement, and eddy currents will be generated when the refrigerant flows through the throttling valve, thereby generating mechanical noise and flow noise. If the throttling effect of flow adaptability can be achieved on the throttling tube (valve), and variable flow adaptive throttling can be achieved, it can not only save material and manufacturing costs, but also save the cost of control strategy. Therefore, how to simplify the control problem of the throttling mechanism, automate simple problems, and how to achieve adaptive throttling of throttling valves with variable flow or under variable pressure, reduce noise, reduce failure rate, facilitate maintenance and replacement, and improve the reliability of equipment operation are the pursuits of industry engineers and researchers. Summary of the invention

[0003] In order to overcome the defects and shortcomings of the prior art, the present invention provides an adaptive throttle valve and an adaptive throttle valve assembly, which effectively solves the problem that the existing throttle valve cannot achieve adaptive throttling effect under variable flow or pressure difference, maintains the refrigeration effect, reduces the risk of jamming and noise, reduces noise, and effectively improves the reliability of refrigeration equipment operation. To this end, the present invention adopts the following technical solutions:

[0004] To this end, the first aspect of the present invention provides an adaptive throttle valve. The second aspect of the present invention provides an adaptive throttle valve assembly.

[0005] According to one aspect of the present invention, the following technical solution is used:

[0006] Provided is an adaptive throttle valve, comprising at least a valve body, a valve needle, a valve needle spring, an adjusting spring and an adjusting screw, wherein the valve body is an integrated component provided with a valve seat or a combined structure comprising at least a valve seat or a valve seat assembly and a tubular component, the valve needle spring, the valve needle, the adjusting spring and the adjusting screw can be sequentially arranged in the inner cavity of the valve body behind the valve seat or the valve seat assembly, the valve seat or the valve seat assembly is provided with a throttle valve hole, the front end of the valve needle is opposite to the valve port of the throttle valve hole, the valve needle spring is sleeved on the outer side of the front section of the valve needle, one end of the valve needle spring is arranged on the valve needle, and the other end is arranged on the valve seat or the valve seat assembly , the regulating spring is arranged between the valve needle and the regulating screw, one end of the regulating spring is arranged at the tail end or tail of the valve needle, and the other end of the regulating spring is arranged at the front or front end of the regulating screw, the regulating screw and the inner wall of the valve body are either threadedly connected or threadedly connected through a thread sleeve fixed on the inner wall of the valve body, or the regulating screw is fixed to the inner wall of the valve body, the valve needle can move axially, the front end of the valve needle is a needle thin part, the valve needle spring provides a thrust to make the valve needle move away from the movement trend of the throttle valve hole, and the regulating spring provides a pre-tightening force to make the valve needle move toward the movement trend of the throttle valve hole. A gap is left between the valve needle and the inner wall of the valve body, and the valve needle is respectively acted on by the elastic force of the valve needle spring and the regulating spring. The valve needle can move axially in the valve body under the action of force to close or open the flow area of ​​the valve port.

[0007] The adaptive throttle valve is provided with at least two interfaces, which are fluid inlet and outlet channels, one interface is connected to the throttle valve hole channel, and the other interface is connected to the inner cavity of the valve body. The interfaces can be both arranged on the side of the valve body, or both arranged in the axial direction of the valve body, or one interface can be arranged on the side of the valve body and the other interface can be arranged in the axial direction of the valve body. The interface can be connected to the fluid delivery pipeline by welding or threaded connection.

[0008] The valve body may be an integrated structure, the valve seat is a part of the valve body, the valve seat is arranged at one end of the valve body, the valve seat is provided with a throttle valve hole, and the throttle valve hole is connected to an interface of the adaptive throttle valve.

[0009] The valve body may also be a combined structure, including at least two independent parts, a valve seat or valve seat assembly and a tubular member, which are then combined together to form the valve body. One or more annular grooves, steps or cylindrical cavities may be provided on the two end faces or one end face of the valve seat or valve seat assembly. A throttle valve hole is provided on the valve seat or valve seat assembly, and one or more annular grooves may be provided on the outer side of the valve seat or valve seat assembly to facilitate rolling sealing and fixing. The valve seat or valve seat assembly is arranged at one end of the tubular member to form the valve body, or the valve seat or valve seat assembly is partially or completely inserted into one end of the tubular member and connected to form the valve body, or one end of the tubular member is partially inserted into the valve seat or valve seat assembly to form the valve body. The connection method includes but is not limited to welding, rolling, interference fit or threaded connection. The valve seat or valve seat assembly, valve needle spring, valve needle, adjustment spring, and adjustment screw are arranged in the tubular member in sequence. In order to limit the valve needle spring, the outer periphery of the valve seat or valve seat assembly can extend along the axial direction, and the extended structure encloses a cylindrical cavity or a cylindrical opening as the valve seat cavity, in which a part or all of the valve needle spring can be placed, and a step can be provided in the cylindrical cavity or the cylindrical opening. The two interfaces of the adaptive throttle valve can also be provided on the valve seat or valve seat assembly, or one is provided on the valve seat or valve seat assembly and the other is provided on the tubular member, one is connected to the throttle valve hole, and the other is connected to the throttle valve inner cavity.

[0010] For the valve body of the combined structure, the valve seat or the valve seat assembly and the tubular member can be connected by threads and additionally provided with sealing facilities, and the threaded rotation of the valve seat or the valve seat assembly can also adjust the relative position of the valve needle.

[0011] One or both end surfaces of the valve seat or valve seat assembly may be configured as a groove, a cylindrical opening, a recessed cavity, an annular groove, or a step, and may also be configured as a plane.

[0012] The space enclosed by the outer periphery of the valve seat or valve seat assembly at the valve port end of the valve seat or valve seat assembly extending along the axial direction is a valve seat cavity. A step or annular groove may be provided in the valve seat cavity. An annular cover plate may be provided at the valve seat cavity, and one end of the valve needle spring may be provided at the annular cover plate.

[0013] A part or all of the valve needle spring is placed in the valve seat cavity of the valve seat or the valve seat assembly.

[0014] The valve seat assembly at least comprises a valve seat body and a valve hole core, the valve hole core is provided with a throttle valve hole, the valve seat body is provided with an axial center hole, and the valve hole core is nested and fixed in the axial center hole of the valve seat body.

[0015] The inlet and outlet of the throttle valve hole channel can be configured to be in a bell-mouth shape, which can reduce the generation of flow vortices.

[0016] The valve needle spring is sleeved on the outside of the front section of the valve needle. One end of the valve needle spring can be arranged on the outer wall of the valve needle or on the step or the annular groove, and the other end is arranged on the valve seat or the valve seat assembly. Both ends of the valve needle spring can be fixed on the contacting surface, or one end is fixed and the other end is not fixed, or both ends are not fixed.

[0017] In order to make the end surface of the valve needle spring flat and maintain the coaxiality of the valve needle and the throttle valve hole, a transition flat ring can be provided at one or both ends of the valve needle spring. The purpose of the transition flat ring is to enable the valve needle spring to be flatly arranged on the surface of the contacted object and maintain the coaxiality of the valve needle installation.

[0018] The valve needle spring can be a flat head spring.

[0019] For simplicity, the valve needle spring may not be provided with transition flat rings at both ends.

[0020] The valve needle outer surface may be composed of the same or different revolution surfaces.

[0021] One or more steps or annular grooves may be arranged on the outer side of the valve needle. One end of the valve needle spring may be positioned or limited on the step or annular groove on the outer side of the valve needle.

[0022] An annular groove may be provided at the valve needle step, and one end of the valve needle spring may be embedded in the annular groove.

[0023] An axial flow passage may be provided on or outside the valve needle. Of course, no axial flow passage may be provided on or outside the valve needle.

[0024] The tail or end of the valve needle may be provided with a step or an annular groove or a recess or a cavity to facilitate the arrangement of the regulating spring.

[0025] In order to make the end surface of the adjusting spring flat and maintain the coaxiality of the valve needle, a transition flat ring can be provided at one end or both ends of the adjusting spring so that the adjusting spring can be evenly arranged on the surface of the contacting object.

[0026] The adjusted spring may be a flat head spring.

[0027] For simplicity, the adjusting spring may not be provided with transition flat rings at both ends.

[0028] The two ends of the regulating spring are respectively arranged on the valve needle and the regulating screw. The two ends of the regulating spring can be fixed on the contacting surface, or one end is fixed and the other end is not fixed, or both ends are not fixed.

[0029] The two ends of the regulating spring can be fixed on the valve needle and the regulating screw respectively, which can effectively prevent the valve needle from rotating.

[0030] The front or leading end of the adjusting screw may be provided with a step, a ring groove, a groove, or a cavity to facilitate the setting of the adjusting spring, and the tail of the adjusting screw may be provided with a structure for convenient screwing and adjustment, such as but not limited to a slot, a cross slot, a hexagonal socket, or other internal polygonal structures, or a protruding polygonal boss / ring, an adjusting rod, or other structures that are convenient for screwing in and out with tools.

[0031] A pressure plate or a pressure ring for fixing the adjusting spring may be arranged between the adjusting spring and the adjusting screw, an annular step may be arranged on the pressure plate or the pressure ring, and the adjusting screw acts on the pressure plate or the pressure ring.

[0032] The inner wall of one end of the valve body may be provided with an internal thread, and the adjusting screw may be provided with an external thread. The adjusting screw may be screwed in and out of the valve body to adjust the tightness of the adjusting spring and the valve needle spring to achieve the best valve opening and closing capability of the valve needle. A sealing ring may be provided at the contact between the adjusting screw and the valve body.

[0033] The inner side of the valve body may not be provided with an internal thread, a thread sleeve may be provided between the valve body and the adjusting screw, one or more annular grooves may be provided on the outer periphery of the thread sleeve, the thread sleeve is fixed on the inner side of the valve body, the adjusting screw may be screwed in and out to adjust the tightness of the adjusting spring and the valve needle spring to achieve the best switching capability of the valve needle. A sealing ring may be provided at the contact between the adjusting screw and the thread sleeve.

[0034] An axial circulation channel may be provided on or outside the adjusting screw; or no axial circulation channel may be provided on or outside the adjusting screw.

[0035] A cavity may be provided at the tail end or tail of the valve needle, a step may be provided in the cavity, and one or more steps or annular grooves may also be provided at the front of the adjusting screw. The equivalent diameter of at least one step on the adjusting screw is larger than the inner diameter of the adjusting spring.

[0036] The adjusting spring and the front section of the adjusting screw can be inserted into the hole cavity at the tail end or tail part of the valve needle. A rigid ball can be arranged between the adjusting spring and the bottom of the hole cavity at the tail end or tail part of the valve needle to maintain the balance of the adjusting spring. The rigid ball may also be omitted. The adjusting spring can be sleeved on the outside of the front section of the adjusting screw and stop at a step on the adjusting screw. The equivalent diameter of the step is larger than the inner diameter of the adjusting spring, which can block and compress the adjusting spring.

[0037] The valve needle, adjusting spring and adjusting screw can form an adjusting valve needle assembly, and the edge of the hole cavity at the tail end or tail of the valve needle can also be narrowed or use an annular or semi-annular retaining ring to limit the sliding out of the inserted part of the adjusting spring and the adjusting screw.

[0038] The front end or front part of the adjusting screw can also be set as a cavity, a step can be set in the cavity, and the rear section of the valve needle can be set with one or more steps or annular grooves. The equivalent diameter of at least one step on the valve needle is larger than the inner diameter of the adjusting spring.

[0039] The tail of the adjusting spring and the valve needle can be inserted into the hole cavity at the front end or front part of the adjusting screw. A rigid ball can be arranged between the adjusting spring and the bottom of the hole cavity at the front end or front part of the adjusting screw to maintain the balance of the adjusting spring. The rigid ball may also be not arranged. The adjusting spring can be sleeved on the outside of the rear section of the valve needle and stop at a step on the rear section of the valve needle. The equivalent diameter of the step is larger than the inner diameter of the adjusting spring, which can block and compress the adjusting spring.

[0040] The valve needle, adjusting spring and adjusting screw can form an adjusting valve needle assembly, and the edge of the cavity at the front end or front part of the adjusting screw can also be narrowed or use an annular or semi-annular retaining ring to limit the sliding out of the adjusting spring and the inserted rear section of the valve needle.

[0041] A sealing ring may be provided at the contact point between the adjusting screw and the valve body to prevent leakage of the fluid in the valve when the adjusting screw is adjusted.

[0042] An interface is provided on the side of the valve body. When the end of the valve body close to the adjusting screw is not used as the interface of the adaptive throttle valve, it is used as the adjusting port of the adjusting screw. The adjusting screw may not be provided with an axial flow channel. A sealing ring may be provided at the contact between the adjusting screw and the valve body to prevent leakage of fluid in the valve when adjusting the adjusting screw. The end of the valve body close to the adjusting screw may be sealed with a detachable or non-detachable sealing cap or sealing cover, such as including but not limited to setting a thread and sealing it with a screw cover to facilitate removal and adjustment of the adjusting screw at any time. A sealing facility may be added when the screw cover is sealed, or other sealing methods may be used for the end of the valve body close to the adjusting screw: such as welding and rolling sealing caps or sealing covers, closing the end, fusing the end, etc.

[0043] In a simple case, when the valve body is a split structure, the tubular member can be a valve cover with one end closed. In this case, there is no need to provide an adjusting screw or an adjusting screw to fix it. During adjustment, the valve seat or the valve seat assembly can be used to control the elastic force of the valve needle spring and the adjusting spring so that the valve needle is in a suitable position, and then the valve seat or the valve seat assembly is fixed.

[0044] An adjusting rod may be arranged or connected to the rear end or back portion of the adjusting screw, and the adjusting rod may be hidden in the sealing cap or exposed outside the sealing cover. The adjusting rod passes through the sealing cap, and a sealing device may be used to seal the two.

[0045] The end of the adjusting rod is configured to be in a shape suitable for being twisted by a tool, and an adjusting handle may also be added to the end of the adjusting rod to facilitate twisting by hand or with a tool.

[0046] When the valve body is a split structure, the tubular component can be a valve cover with one end closed, a hole can be set in the middle of the bottom of the valve cover, the adjusting rod of the adjusting screw passes through the hole at the bottom of the valve cover, and a sealing facility is set between the adjusting rod and the hole at the bottom of the valve cover. The adjusting screw is adjusted by the adjusting rod to control the elastic force of the valve needle spring and the adjusting spring so that the valve needle is located in a suitable position.

[0047] The rear end of the adjusting screw may also be provided with an internal thread hole, and the front section of the adjusting rod may be provided with an external thread. The adjusting rod may be screwed into the internal thread at the rear end of the adjusting screw, and the adjusting rod may be adjusted to control the movement of the adjusting screw.

[0048] A protruding rod-shaped object may also be provided at the rear end of the adjusting screw, and an external thread may be provided on the rod-shaped object. An internal threaded hole may be provided at the front end of the adjusting rod. The externally threaded rod-shaped object at the rear end of the adjusting screw may be screwed into the adjusting rod. The adjusting rod may be adjusted to control the movement of the adjusting screw.

[0049] A sealing device is provided between the regulating rod and the sealing cap or the valve cover.

[0050] There may only be relative rotational movement between the adjusting rod and the sealing cap or the valve cover.

[0051] To prevent the valve needle from rotating or colliding with the valve body, one or more axial guide grooves or guide holes can be set on the valve needle, and one or more guide rails can be set in the valve body. The guide rails pass through the guide grooves or guide holes on the valve needle. One end or both ends of the guide rail are fixed, and can be fixed to the valve seat or valve seat assembly, to the inner wall of the valve body, to the thread sleeve, or to the adjusting screw.

[0052] For simplification, the inner side of the valve body may not be provided with an internal thread, and the adjusting screw may not be provided with an external thread, but only serves as an adjusting limit component. In this case, one or more annular grooves may be provided on the outer periphery of the adjusting screw to facilitate rolling sealing. After the tightness of the adjusting spring is adjusted and the valve needle is in the optimal position, the adjusting screw can be fixedly sealed on the inner wall of the valve body.

[0053] In order to prevent the valve needle from rotating, a stop rod for preventing the valve needle from rotating may also be provided on the outer edge or outside of the valve needle.

[0054] A filter screen may be arranged in one or both of the interface pipe channels of the adaptive throttle valve.

[0055] To prevent fluid leakage, sealing facilities may be provided at all movable parts associated with the outside of the adaptive throttle valve.

[0056] A second aspect of the present invention proposes an adaptive throttle valve assembly, which includes: an adaptive throttle valve structure as in any of the above technical solutions.

[0057] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention uses variable flow throttling as an adaptive throttle valve, and initially controls the adjusting screw so that the valve needle is in a closed or slightly open equilibrium state under the action of the valve needle spring and the adjusting spring (if used as a two-way throttle valve, it can be adjusted in advance to the optimal opening for reverse flow, i.e., heating operation). When the fluid throttles from the adaptive throttle valve inlet through the valve seat or the throttle valve hole on the valve seat assembly, as the incoming fluid flow rate increases or the pressure difference increases, the thrust of the fluid on the valve needle will also increase, the original valve needle balance force is broken, the valve needle moves, the adjusting spring is further compressed, and the valve mouth is opened. Under the action of the valve needle spring, the adjusting spring, and the fluid pressure, the force on the valve needle will be rebalanced. Similarly, when the flow rate decreases or the pressure difference decreases, the thrust of the fluid on the valve needle decreases, the valve needle spring recovers and is compressed, the valve needle moves in the opposite direction, the valve mouth is closed, and under the action of the valve needle spring, the adjusting spring, and the fluid pressure, the force on the valve needle is rebalanced. When flowing in the reverse direction, the fluid flows in from the other interface, flows out after being throttled by the valve hole, and can be used for adaptive throttling under bidirectional variable flow or variable pressure difference.

[0058] It should be noted that the precise realization of unidirectional and bidirectional flow requirements can also be achieved in the following way: the adaptive throttle valve and its components proposed by the present invention, two sets of components are used in reverse parallel to meet the bidirectional flow requirements. Or the adaptive throttle valve and its components proposed by the present invention are connected in series with a one-way valve to form a new component to meet the unidirectional requirements, and the two sets of new components are used in reverse parallel to meet the bidirectional flow requirements.

[0059] In addition, due to the restraining damping effect of the compressed valve needle spring and the compressed regulating spring, the throttling flow caused by the pressure fluctuation can be reduced, and the noise caused by the valve needle vibration can be reduced. The trumpet-shaped inlet and outlet can effectively reduce the flow vortex, less vortex or vortex-free flow, and further reduce the flow noise. Since they are all mechanical parts, and the damping effect of the springs at both ends of the valve needle, the displacement of the moving parts is small, and the valve needle oscillates little, which can basically eliminate mechanical collision noise, high reliability, no cumbersome control strategy, reduce the failure rate of the unit operation, make the refrigeration unit simple and reliable, and reduce costs, and also facilitate maintenance and replacement, and improve the reliability of the refrigeration unit operation. The purpose of simplifying the control problems of the throttling mechanism and automating simple problems is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0061] Figure 1 A structural schematic diagram of a combined valve body adaptive throttle valve.

[0062] Figure 2 A structural schematic diagram of an integrated valve body adaptive throttle valve.

[0063] Figure 3 Another structural schematic diagram of an adaptive throttle valve.

[0064] Figure 4 It is another structural schematic diagram of an adaptive throttle valve.

[0065] Among them, 1-tubular component, 2-valve seat, 3-valve needle spring, 4-valve needle, 5-adjusting spring, 6-retaining ring, 7-thread sleeve, 8-adjusting screw, 9-throttle valve hole, 10-adjusting screw flow hole, 11-valve body, 12-valve needle spring, 13-valve needle, 14-adjusting spring, 15-adjusting screw flow hole, 16-adjusting screw, 17-throttle valve hole, 18-valve body, 19-valve needle spring, 20-valve needle, 21-adjusting spring, 22-retaining ring, 23-adjusting screw, 24-sealing cap, 25-interface, 26-interface, 27-throttle valve hole, 42-tubular component, 43-valve seat body, 44-valve needle spring, 45-valve needle, 46-adjusting spring, 47-threadless adjusting screw, 48-flow hole on adjusting screw, 49-valve hole core DETAILED DESCRIPTION

[0066] The present invention is further described below in conjunction with specific implementation methods, wherein the accompanying drawings are only used for exemplary descriptions and represent only schematic diagrams rather than actual drawings, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0067] Example 1

[0068] like Figure 1 As shown, this embodiment provides a structural schematic diagram of a combined valve body adaptive throttle valve. It can be implemented as follows:

[0069] The tubular component 1, valve seat 2 and throttle valve hole 9, valve needle spring 3, valve needle 4, adjustment spring 5, retaining ring 6, thread sleeve 7, adjustment screw 8 and flow hole 10 are processed separately in advance. Then assemble the above processed parts together: first, the valve seat 2 and the tubular component 1 can be assembled and rolled to form a valve body, and then the valve needle assembly is assembled: the adjustment spring 5 is placed in the rear cavity of the valve needle 4, and then the front section of the adjustment screw 8 is inserted and the retaining ring 6 is set, then the thread sleeve 7 is put on the outside of the adjustment screw 8, and then the valve needle spring 3 is put on the prepared valve needle assembly and then placed in the assembled valve body, and then the thread sleeve 7 is positioned with a tool and fixed inside the tubular component 1. After assembly, the adjustment screw can be adjusted to the appropriate position of the valve needle. After installation on the refrigeration equipment, according to the system operation status, the refrigerant fluid can enter the throttle valve hole 9 from the end of the valve seat 2 for throttling, and then flow out of the throttle valve through the adjustment screw flow hole 10.

[0070] Example 2

[0071] like Figure 2 As shown, this embodiment provides a structural schematic diagram of an integrated valve body adaptive throttle valve. It can be implemented as follows:

[0072] Pre-process the components: valve body 11 (including the internal thread at the end of the inner wall of valve body 11, throttle valve hole 17 on valve body 11), valve needle spring 12, valve needle 13, adjusting spring 14, adjusting screw 16 (including flow hole 15), then assemble valve needle 13, adjusting spring 14, adjusting screw 16 and retaining ring into valve needle assembly, then put valve needle spring 12 on the valve needle front section of the set valve needle assembly, put it into the inner cavity of valve body 11, then turn adjusting screw 16, and adjust valve needle 13 to the best position. After installation on refrigeration equipment, refrigerant fluid can be throttled from the valve seat end through throttle valve hole 17, and then flow out of throttle valve through adjusting screw flow hole 15.

[0073] Example 3

[0074] like Figure 3As shown, this embodiment provides a structural schematic diagram of an adaptive throttle valve. It can be implemented as follows:

[0075] Process the components in advance: valve body 18 (including the internal thread at the end of the inner wall of valve body 18, throttle valve hole 27 on valve body 18, interface 25 and interface 26), valve needle spring 19, valve needle 20, adjusting spring 21, retaining ring 22, adjusting screw 23, sealing cap 24, then assemble valve needle 14, adjusting spring 15, adjusting screw 23, retaining ring 22, etc. into valve needle assembly, and install the sealing ring of adjusting screw 23, put valve needle spring 19 on the outer side of the valve needle front section of the set valve needle assembly, put it into the inner cavity of valve body 18, then tighten the adjusting screw 23, and pre-adjust the position of valve needle 20, and finally cover the sealing cap 24. After installation on the refrigeration equipment, the sealing cap 24 can be removed, and the adjusting screw 23 can be adjusted with a tool according to the system operation status. After the system runs to the best state, the sealing cap 24 can be covered. The refrigerant fluid can enter the throttling from the interface pipe 26 and then flow out of the throttling valve from the interface pipe 25.

[0076] Example 4

[0077] like Figure 4 As shown, this embodiment provides another structural schematic diagram of an adaptive throttle valve. It can be implemented as follows:

[0078] The valve seat body 43, valve hole core 49, tubular member 42, valve needle spring 44, valve needle 45, adjustment spring 46, and adjustment screw 47 (including flow hole 48) are processed separately in advance. Then, the above processed parts are assembled together: first, the valve seat body 43 and the valve hole core 49 are assembled and welded into a valve seat assembly, and then the assembled valve seat assembly, valve needle spring 44, valve needle 45, adjustment spring 46, and adjustment screw 47 are sequentially placed in the tubular member 42, and the corresponding spring pressure is adjusted by the tooling, and then the valve seat body 43 and the tubular member 42 at the adjustment screw 47 are respectively rolled and fixed. After being installed on the refrigeration equipment, the refrigerant fluid can enter the throttle valve from the valve seat assembly end, and then flow out of the throttle valve from the adjustment screw 48 end after throttling.

[0079] The above describes in detail the adaptive throttle valve and four implementation schemes of the throttle valve provided by the present invention. Four specific examples are used in this paper to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention.

[0080] It should be further explained that although the application implementation schemes listed are all designed for the refrigeration field, the present invention proposes an adaptive throttle valve and its components that can be applied to the field of fluid flow control as a flow regulating valve. The throttling mentioned here actually refers to the control of the fluid flow. Different equipment and different application scenarios will have different control requirements for fluid flow. The throttle valve hole, valve needle and other components can be optimized and designed accordingly for different application scenarios and equipment.

[0081] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0082] Unless otherwise specifically stated, the relative arrangement of the components and steps, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and devices should be considered as part of the authorized specification.

[0083] In the description of the present invention, it is necessary to understand that the orientation or positional relationship indicated by directional words such as "front section, rear section, front part, tail, tail section, last section", "front end, rear end, upper end, lower end, end", "longitudinal, transverse" and "upper part, lower part, side, bottom surface, front, back, left, right", etc. is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0084] In addition, it should be noted that the use of words such as "first", "then", and "again" to limit the processing order is only for the convenience of describing the present invention. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0085] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention. These improvements and modifications also fall within the protection scope of the claims of the present invention.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adaptive throttle valve having at least two fluid inlet and outlet ports, one port being connected to the valve hole channel, and the other port being connected to the inner cavity of the valve body, characterized in that: At least includes a valve body, a valve needle, a valve needle spring, an adjusting spring, and an adjusting screw. The valve body is an integrated component with a valve seat or a combined structure including a valve seat or a valve seat assembly and a tubular component. The valve needle spring, valve needle, adjusting spring, and adjusting screw are arranged in the valve body of the rear section of the valve seat or the valve seat assembly. A throttle valve hole is arranged on the valve seat or the valve seat assembly. The front end of the valve needle is opposite to the valve port of the throttle valve hole. The valve needle spring is sleeved on the outer side of the needle thin part of the front section of the valve needle. One end of the valve needle spring is arranged on the valve needle. The other end of the spring is arranged on the valve seat or valve seat assembly, the adjusting spring is arranged between the valve needle and the adjusting screw, one end of the adjusting spring is arranged on the tail section or tail part of the valve needle, and the other end is arranged on the front section or front part of the adjusting screw, the adjusting screw and the inner wall of the valve body are either threadedly connected or threadedly connected through a thread sleeve fixed on the inner wall of the valve body, or the adjusting screw is fixed to the inner wall of the valve body, a gap is left between the valve needle and the inner wall of the valve body, and the valve needle can move axially in the valve body under the action of force.

2. The adaptive throttle valve according to claim 1, characterized in that: One end or both end surfaces of the valve seat or valve seat assembly are arranged as a groove or a cylindrical opening or an annular groove or a step or a plane.

3. The adaptive throttle valve according to claim 1, characterized in that: The valve seat assembly at least comprises a valve seat body and a valve hole core, wherein the valve hole core is provided with a throttle valve hole, and the valve hole core is nested and fixed at the axial center hole of the valve seat body.

4. The adaptive throttle valve according to claim 1, characterized in that: One or more steps or annular grooves are arranged on the outer side of the valve needle, and the tail end or tail portion of the valve needle is arranged as a step or annular groove or a recess or a cavity.

5. The adaptive throttle valve according to claim 1, characterized in that: One or more steps or annular grooves are arranged on the outer side of the adjusting screw, and the front end or front part of the adjusting screw is arranged as a step or annular groove or a groove or a cavity.

6. The adaptive throttle valve according to claim 1, characterized in that: The valve body or tubular component has a sealing cap or seal at the end.

7. The adaptive throttle valve according to claim 1, characterized in that: The two interfaces of the adaptive throttle valve are both arranged on the side of the valve body, or are both arranged in the axial direction of the valve body, or one interface is arranged on the side of the valve body and the other interface is arranged in the axial direction of the valve body, or are both arranged on the valve seat or valve seat assembly.

8. The adaptive throttle valve according to claim 1, characterized in that: One end or both ends of the valve needle spring or the regulating spring are fixed on the contacting surface, or both ends are not fixed.

9. The adaptive throttle valve according to claim 1, characterized in that: A transition smoothing ring may be provided at one end or both ends of the valve needle spring or the regulating spring.

10. An adaptive throttle valve assembly, characterized in that: The adaptive throttle valve assembly comprises: an adaptive throttle valve structure according to any one of claims 1 to 9.

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