A high-flow regulating needle valve

Abstract

The present invention relates to the technical field of needle valves, and particularly relates to a high-flow regulating needle valve, which comprises a needle valve body, an adjusting sleeve, a valve rod, a valve core, an elastic member and an elastic protective sleeve. The needle valve body includes a valve cap and a valve seat, and a flow passage for fluid flow is formed in the valve seat; the adjusting sleeve is inserted into the needle valve body and can slide along its own axis direction; the valve rod is threadedly inserted into the adjusting sleeve and can both rotate around its own axis and slide along its own axis direction; the valve core is arranged on the valve rod and is configured to be separable from or in contact with the valve seat to change the opening degree of the flow passage; under the action of the elastic member, the valve core has a tendency to block the flow passage; the elastic protective sleeve is sleeved on the valve rod, and the elastic protective sleeve can slide relative to the valve rod along its own axis direction and has corresponding first and second positions before and after sliding. When in the second position, the elastic protective sleeve wraps the valve core, so that when the high-flow regulating needle valve is in the open state, the valve core can be protected.

Description

Technical Field

[0001] The present invention relates to the technical field of needle valves, and particularly to a high-flow regulating needle valve. Background Art

[0002] As a key control component, the working principle of a needle valve is to adjust the contact state between a needle-shaped valve core and a valve seat, thereby achieving operations such as opening and closing of fluid, flow regulation, and cut-off. It has significant characteristics such as simple structure, sensitive response, and precise control, and is widely used in various industrial fields and equipment involving fluid control.

[0003] In related technologies, for example, Chinese Patent Application CN108953728A discloses a self-locking flow regulating needle valve. The valve core and valve seat of this self-locking flow regulating needle valve adopt a sixty-degree cone fit, which has good self-centering and sealing effects. When the valve core is in full contact with the valve seat, the inlet and outlet flow channels can be completely disconnected to achieve zero flow output.

[0004] However, the above self-locking flow regulating needle valve also has some problems in actual use. Among them, when the self-locking flow regulating needle valve is in the open state, the valve core will inevitably be affected by fluid impact. Under long-term impact, it is extremely easy to cause defects such as erosion and pits on the surface of the valve core. As a result, when the valve core is in contact with the valve seat after being subjected to long-term fluid impact, problems such as poor sealing are likely to occur, thereby affecting the performance of the needle valve. Summary of the Invention

[0005] Based on this, it is necessary to provide a high-flow regulating needle valve to address the problem of poor performance of current needle valves.

[0006] The above object is achieved through the following technical solutions:

[0007] A high-flow regulating needle valve, the high-flow regulating needle valve comprising:

[0008] A needle valve body, the needle valve body comprising a valve cap and a valve seat, and a flow channel for fluid flow is formed in the valve seat;

[0009] An adjusting sleeve, inserted into the needle valve body and capable of sliding along its own axis;

[0010] A valve rod, threadedly inserted into the adjusting sleeve and capable of rotating around its own axis and sliding along its own axis;

[0011] A valve core, disposed on the valve rod and configured to be separable from or in contact with the valve seat to change the opening degree of the flow channel;

[0012] An elastic member is disposed between the valve cap and the adjusting sleeve. Under the action of the elastic member, the valve core has a tendency to block the flow passage.

[0013] An elastic protective sleeve is sleeved on the valve stem and can respectively form a stop fit with the valve stem and the valve seat. The elastic protective sleeve can slide relative to the valve stem along its own axis direction and has corresponding first and second positions before and after sliding. The first position is farther from the valve core than the second position. When in the second position, the elastic protective sleeve wraps the valve core.

[0014] Further, a first annular protrusion is provided in the valve seat; a second annular protrusion is provided on the elastic protective sleeve. The second annular protrusion and the first annular protrusion have an overlapping area in the extending direction of the valve stem to form a stop fit; a third annular protrusion is provided on the valve stem. The third annular protrusion and the second annular protrusion have an overlapping area in the extending direction of the valve stem to form a stop fit; a chute is provided on the valve stem. The chute extends along the extending direction of the valve stem and one end extends to the third annular protrusion, and the other end extends to the position where the elastic protective sleeve can just completely wrap the valve core. A slider is provided on the inner peripheral wall of the elastic protective sleeve, and the slider is slidably inserted into the chute, or a chute is provided on the inner peripheral wall of the elastic protective sleeve and a slider is provided on the valve stem.

[0015] Further, the elastic protective sleeve includes an outer layer and an inner layer which are sleeved. The outer layer is of an elastic sleeve-shaped structure and is sleeved on the inner layer; the inner layer is of a plastic structure and is configured to support the outer layer.

[0016] Further, the high-flow regulating needle valve further includes an anti-overdeformation assembly configured to reduce the acting force of the elastic member on the elastic protective sleeve.

[0017] Further, the anti-overdeformation assembly includes a plurality of partition strips and a plurality of guide strips. The plurality of partition strips are arranged circumferentially on the inner peripheral wall of the valve cap. A channel is formed between adjacent partition strips. The partition strips extend along the axis direction of the valve cap; the plurality of guide strips are arranged circumferentially on the outer peripheral wall of the adjusting sleeve and are respectively arranged corresponding to the channels. Each guide strip has a fixed section and an elastic section. The elastic section is inclined and can undergo elastic deformation under the pushing of the partition strip.

[0018] Further, the high-flow regulating needle valve further includes an elastic sealing ring sleeved on the elastic protective sleeve and located at one end of the elastic protective sleeve close to the valve core. The elastic sealing ring is configured to seal the valve stem and the valve seat.

[0019] Further, the high-flow regulating needle valve further includes a first seal configured to seal the regulating sleeve, the valve stem, and the valve seat.

[0020] Further, a threaded fit is formed between the valve cap and the valve seat.

[0021] Further, the high-flow regulating needle valve further includes a second seal configured to seal the valve cap, the valve seat, and the regulating sleeve.

[0022] Further, the high-flow regulating needle valve further includes a hand lever disposed on the valve stem and located outside the valve seat.

[0023] The beneficial effects of the present invention are as follows:

[0024] During the use of the high-flow regulating needle valve provided by the present invention, when the elastic protective sleeve switches from the first position to the second position, due to the relative movement between the valve core and the elastic protective sleeve, the elastic protective sleeve can effectively clean foreign matters such as impurities and particles that may exist on the surface of the valve core, avoiding the influence of these foreign matters on the sealing performance when the valve core and the valve seat are fitted again; when the elastic protective sleeve is in the second position, the elastic protective sleeve wraps around the valve core; when the high-flow regulating needle valve switches from the closed state to the open state, due to the relative movement between the elastic protective sleeve and the valve seat, the elastic protective sleeve can effectively clean foreign matters such as impurities and particles that may exist on the surface of the valve seat, avoiding the influence of these foreign matters on the sealing performance when the valve seat and the valve core are fitted again; when the high-flow regulating needle valve is in the open state, the fluid flows in the flow channel. At this time, since the elastic protective sleeve wraps around the valve core, it can avoid the direct impact of the fluid on the surface of the valve core, ensuring the integrity of the surface of the valve core while ensuring that the sealing performance is not affected when the valve core and the valve seat come into contact again, thereby ensuring the stability and reliability of the high-flow regulating needle valve during long-term use and improving the performance of the high-flow regulating needle valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a perspective structural schematic diagram of the high-flow regulating needle valve provided by an embodiment of the present invention;

[0026] Figure 2 is a cross-sectional structural schematic diagram of the high-flow regulating needle valve provided by an embodiment of the present invention Figure 1 ;

[0027] Figure 3 is Figure 2 a partial enlarged structural schematic diagram at A in

[0028] Figure 4 is a cross-sectional structural schematic diagram of the high-flow regulating needle valve provided by an embodiment of the present invention Figure 2 ;

[0029] Figure 5 For Figure 4 The schematic diagram of the partially enlarged structure at position B in

[0030] Figure 6 The schematic cross-sectional structure diagram of the high-flow regulating needle valve provided by the embodiment of the present invention Figure 3 ;

[0031] Figure 7 For Figure 6 The schematic diagram of the partially enlarged structure at position C in

[0032] Figure 8 The schematic three-dimensional cross-sectional structure diagram of the valve cap of the high-flow regulating needle valve provided by the embodiment of the present invention

[0033] Figure 9 The schematic exploded view of the parts of the high-flow regulating needle valve provided by the embodiment of the present invention

[0034] Figure 10 For Figure 9 The schematic diagram of the partially enlarged structure at position D in

[0035] Wherein:

[0036] 1. Needle valve body; 101. Valve cap; 102. Valve seat; 1021. Flow channel; 1022. First ring convex; 2. Adjusting sleeve; 3. Valve rod; 301. Third ring convex; 4. Valve core; 5. Compression spring; 6. Elastic protective sleeve; 601. Outer layer; 6011. Second ring convex; 602. Inner layer; 701. Partition strip; 7011. Channel; 7012. Partition bar; 702. Guide strip; 7021. Fixed section; 7022. Elastic section; 8. Elastic sealing ring; 9. First sealing ring; 10. Second sealing ring; 11. Hand lever; 12. Lock pin. Specific embodiments

[0037] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] The serial numbers assigned to the components in this text, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. The terms "connection" and "coupling" as used herein, unless otherwise specified, both include direct and indirect connection (coupling). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0039] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0040] As Figures 1 to 10 shown, the high-flow regulating needle valve provided by the embodiment of the present invention is arranged to include a needle valve body 1, an adjusting sleeve 2, a valve stem 3, a valve core 4, an elastic member and an elastic protective sleeve 6. The needle valve body 1 includes a valve cap 101 and a valve seat 102, and a flow passage 1021 for fluid flow is formed in the valve seat 102; the adjusting sleeve 2 is inserted into the needle valve body 1 and can slide along its own axis direction; the valve stem 3 is threadedly inserted into the adjusting sleeve 2 and can both rotate around its own axis and slide along its own axis direction; the valve core 4 is arranged on the valve stem 3 and is configured to be able to separate from or contact the valve seat 102 to change the opening degree of the flow passage 1021; the elastic member is arranged between the valve cap 101 and the adjusting sleeve 2, and under the action of the elastic member, the valve core 4 has a tendency to block the flow passage 1021; the elastic protective sleeve 6 is sleeved on the valve stem 3 and can respectively form a stop fit with the valve stem 3 and the valve seat 102. The elastic protective sleeve 6 can slide along its own axis direction relative to the valve stem 3 and has corresponding first and second positions before and after sliding. The first position is set farther away from the valve core 4 than the second position. When in the second position, the elastic protective sleeve 6 wraps the valve core 4.

[0041] Specifically in this embodiment, taking the case where the needle valve body 1 is vertically arranged as an example, as Figure 2As shown, the flow channel 1021 is horizontally disposed inside the valve seat 102. To facilitate the installation of the valve cap 101, the adjusting sleeve 2, the valve stem 3, the valve core 4, and the elastic protective sleeve 6, a first mounting hole is provided at the top of the valve seat 102. The first mounting hole communicates with the flow channel 1021. When installed, the valve cap 101 covers the top of the valve seat 102 to prevent dust and other impurities from entering the needle valve body 1 through the first mounting hole. The adjusting sleeve 2 is vertically disposed when installed and is inserted into both the valve cap 101 and the first mounting hole at the same time. The valve stem 3 is vertically disposed when installed, and its top end penetrates through the top of the valve cap 101 for easy manual operation, and its bottom end is inserted into the first mounting hole. The valve core 4 is located at the bottom end of the valve stem 3 when installed to facilitate cooperation with the valve seat 102. The elastic protective sleeve 6 is vertically disposed when installed and is disposed near the bottom end of the valve stem 3 to facilitate cooperation with the valve core 4.

[0042] Optionally, the elastic member can be set as an elastic block or an elastic column, with its top end disposed on the inner top wall of the valve cap 101 and its bottom end disposed on the top surface of the adjusting sleeve 2. Under the action of the elastic block or the elastic column, the adjusting sleeve 2 has a tendency to move downward. The adjusting sleeve 2 has a tendency to drive the valve stem 3 and the valve core 4 to move downward through the threaded cooperation with the valve stem 3, so that the valve core 4 has a tendency to block the flow channel 1021, thereby ensuring the sealing performance between the valve core 4 and the valve seat 102 when the high-flow regulating needle valve is in the closed state.

[0043] Optionally, the number of the elastic blocks or the elastic columns can be set to two or more.

[0044] Optionally, when there are multiple elastic blocks or elastic columns, the multiple elastic blocks or elastic columns can be arranged evenly along the circumferential direction of the valve stem 3 so that the acting forces of the multiple elastic blocks or elastic columns on the adjusting sleeve 2 can be evenly distributed.

[0045] Initially, as Figure 2 and Figure 3 shown, the high-flow regulating needle valve is in the closed state. At this time, the elastic protective sleeve 6 is in the first position, and the valve core 4 is in close contact with the valve seat 102 to completely cut off the flow channel 1021.

[0046] When it is necessary to adjust the high-flow regulating needle valve to switch from the closed state to the open state, first drive the valve stem 3 to move upward. The valve stem 3 synchronously drives the regulating sleeve 2, the valve core 4, and the elastic protective sleeve 6 to move upward. The distance between the regulating sleeve 2 and the valve cap 101 becomes shorter, compressing the elastic member. When the valve stem 3 moves to form a stop fit between the elastic protective sleeve 6 and the valve seat 102, as the valve stem 3 continues to move upward, the elastic protective sleeve 6 moves downward relative to the valve stem 3 and moves from the first position to the second position. When the elastic protective sleeve 6 moves to the second position, the elastic protective sleeve 6 wraps around the valve core 4. At this time, due to the relative movement between the valve core 4 and the elastic protective sleeve 6, under the elastic contraction action of the elastic protective sleeve 6, the elastic protective sleeve 6 can effectively clean foreign matters such as impurities and particles that may exist on the surface of the valve core 4, avoiding the influence of these foreign matters on the sealing performance when the valve core 4 and the valve seat 102 are fitted again.

[0047] Then release the valve stem 3. Under the action of the elastic member, the regulating sleeve 2 synchronously drives the valve stem 3 to move downward through the thread fit with the valve stem 3. The valve stem 3 synchronously drives the valve core 4 and the elastic protective sleeve 6 to move downward, as Figure 4 and Figure 5 shown, until the elastic protective sleeve 6 contacts the valve seat 102. Then rotate the valve stem 3. The valve stem 3 synchronously drives the valve core 4 and the elastic protective sleeve 6 to rotate and move upward through the thread fit with the regulating sleeve 2 to open the flow channel 1021. During the rotation of the valve stem 3, due to the relative movement between the elastic protective sleeve 6 and the valve seat 102, the elastic protective sleeve 6 can effectively clean foreign matters such as impurities and particles that may exist on the surface of the valve seat 102, avoiding the influence of these foreign matters on the sealing performance when the valve seat 102 and the valve core 4 are fitted again. When the fluid flows in the flow channel 1021, since the elastic protective sleeve 6 wraps around the valve core 4, it can avoid the direct impact of the fluid on the surface of the valve core 4. While protecting the integrity of the surface of the valve core 4, it ensures that the sealing performance is not affected when the valve core 4 and the valve seat 102 contact again, thereby ensuring the stability and reliability of the high-flow regulating needle valve during long-term use and improving the service performance of the high-flow regulating needle valve.

[0048] When it is necessary to adjust the high-flow regulating needle valve to switch from the open state to the closed state, first drive the valve stem 3 to move upward. The valve stem 3 synchronously drives the regulating sleeve 2, the valve core 4, and the elastic protective sleeve 6 to move upward. The distance between the regulating sleeve 2 and the valve cap 101 becomes shorter, compressing the elastic member until the elastic protective sleeve 6 disengages from the stop fit with the valve seat 102.

[0049] Then release the valve stem 3. Under the action of the elastic member, the adjusting sleeve 2 drives the valve stem 3 to move downward synchronously through the thread fit with the valve stem 3. The valve stem 3 drives the valve core 4 and the elastic protective sleeve 6 to move downward synchronously. When the elastic protective sleeve 6 forms a stop fit with the valve seat 102, as the valve stem 3 moves downward, the elastic protective sleeve 6 moves upward relative to the valve stem 3 and moves from the second position to the first position, as Figure 6 and Figure 7 shown. At this time, the valve stem 3 and the elastic protective sleeve 6 form a stop fit. As the valve stem 3 continues to move downward, the valve stem 3 drives the elastic protective sleeve 6 to move downward synchronously, as Figure 2 and Figure 3 shown, until the valve core 4 contacts the valve seat 102 again, realizing the truncation of the flow channel 1021.

[0050] Optionally, distance markings can be made on the valve stem 3 to clarify the position of pulling up the valve stem 3.

[0051] Optionally, a driving cylinder can also be provided, and the output shaft of the driving cylinder is fixedly arranged at the top end of the valve stem 3. In this way, the position of the valve stem 3 can be switched by an electric control method, and then the state of the high-flow regulating needle valve can be switched.

[0052] It can be understood that the driving cylinder can be set as any one of a hydraulic cylinder, a pneumatic cylinder or an electric cylinder.

[0053] In some embodiments, a first ring convex 1022 is arranged in the valve seat 102; a second ring convex 6011 is arranged on the elastic protective sleeve 6, and there is an overlapping area between the second ring convex 6011 and the first ring convex 1022 in the extending direction of the valve stem 3 to form a stop fit; a third ring convex 301 is arranged on the valve stem 3, and there is an overlapping area between the third ring convex 301 and the second ring convex 6011 in the extending direction of the valve stem 3 to form a stop fit; a chute is arranged on the valve stem 3, and the chute extends along the extending direction of the valve stem 3, and one end extends to the third ring convex 301, and the other end extends to the position where the elastic protective sleeve 6 can just completely wrap the valve core 4. A slider is arranged on the inner peripheral wall of the elastic protective sleeve 6, and the slider is slidably inserted into the chute, or a chute is arranged on the inner peripheral wall of the elastic protective sleeve 6, and a slider is arranged on the valve stem 3.

[0054] Specifically in this embodiment, as Figure 2 and Figure 3As shown, the first annular protrusion 1022 is disposed on the inner sidewall of the first mounting hole close to the flow channel 1021, and the second annular protrusion 6011 is disposed on the outer peripheral wall of the top of the elastic protective sleeve 6, and there is an overlapping area between the first annular protrusion 1022 and the second annular protrusion 6011 in the vertical direction. Thus, when the elastic protective sleeve 6 moves upward following the valve stem 3, the first annular protrusion 1022 can block the second annular protrusion 6011, and further block the elastic protective sleeve 6, so that the elastic protective sleeve 6 can have relative movement with the valve stem 3, thereby facilitating the switching of the position of the elastic protective sleeve 6.

[0055] The third annular protrusion 301 is fixedly sleeved on the valve stem 3 and is disposed close to the bottom end of the valve stem 3. There is an overlapping area between the third annular protrusion 301 and the second annular protrusion 6011 in the vertical direction. Thus, when the elastic protective sleeve 6 moves upward relative to the valve stem 3, under the block of the third annular protrusion 301, the elastic protection has an upper limit position of upward movement, and this limit position is the first position; to avoid interference, there is no overlapping area between the third annular protrusion 301 and the first annular protrusion 1022 in the vertical direction, so that the valve stem 3 can move freely along the vertical direction relative to the valve seat 102.

[0056] The chute is opened on the sidewall of the valve stem 3 and extends upward along the vertical direction to the third annular protrusion 301, and the chute extends downward along the vertical direction to the position where the elastic protective sleeve 6 can just completely wrap the valve core 4. Thus, when the elastic protective sleeve 6 moves downward relative to the valve stem 3, under the limitation of the bottom end of the chute, the elastic protection has a lower limit position of downward movement, and this limit position is the second position.

[0057] To improve the stability when the elastic protective sleeve 6 and the valve stem 3 move relatively, optionally, the number of chutes can be set to be multiple and arranged circumferentially; the number of sliders is set to be equal to the number of chutes and are correspondingly inserted into the chutes.

[0058] Initially, as Figure 2 and Figure 3 shown, the high-flow regulating needle valve is in the closed state. At this time, the elastic protective sleeve 6 is in the first position, and the valve core 4 and the valve seat 102 are in close contact to completely cut off the flow channel 1021.

[0059] When it is necessary to adjust the high-flow regulating needle valve to switch from the closed state to the open state, first drive the valve stem 3 to move upward. The valve stem 3 synchronously drives the regulating sleeve 2, the valve core 4 and the elastic protective sleeve 6 to move upward. The distance between the regulating sleeve 2 and the valve cap 101 becomes shorter, so that the compression elastic member; when the valve stem 3 moves to form a stop fit between the first annular protrusion 1022 and the second annular protrusion 6011, as the valve stem 3 continues to move upward, under the block of the first annular protrusion 1022, the elastic protective sleeve 6 moves downward relative to the valve stem 3 and moves from the first position to the second position. When the elastic protective sleeve 6 moves to the second position, the elastic protective sleeve 6 wraps the valve core 4. At this time, due to the relative movement between the valve core 4 and the elastic protective sleeve 6, under the elastic contraction effect of the elastic protective sleeve 6, the elastic protective sleeve 6 can effectively clean foreign matters such as impurities and particles that may exist on the surface of the valve core 4, avoiding these foreign matters from affecting the sealing performance when the valve core 4 and the valve seat 102 are fitted again.

[0060] Then release the valve stem 3. Under the action of the elastic member, the regulating sleeve 2 synchronously drives the valve stem 3 to move downward through the thread fit with the valve stem 3. The valve stem 3 synchronously drives the valve core 4 and the elastic protective sleeve 6 to move downward, as Figure 4 and Figure 5 shown, until the elastic protective sleeve 6 contacts the valve seat 102; then rotate the valve stem 3. The valve stem 3 synchronously drives the valve core 4 and the elastic protective sleeve 6 to rotate and move upward through the thread fit with the regulating sleeve 2 to open the flow channel 1021. During the rotation of the valve stem 3, due to the relative movement between the elastic protective sleeve 6 and the valve seat 102, the elastic protective sleeve 6 can effectively clean foreign matters such as impurities and particles that may exist on the surface of the valve seat 102, avoiding these foreign matters from affecting the sealing performance when the valve seat 102 and the valve core 4 are fitted again. When the fluid flows in the flow channel 1021, since the elastic protective sleeve 6 wraps the valve core 4, it can avoid the direct impact of the fluid on the surface of the valve core 4. While protecting the integrity of the surface of the valve core 4, it ensures that the sealing performance when the valve core 4 and the valve seat 102 contact again is not affected, thus ensuring the stability and reliability of the high-flow regulating needle valve during long-term use and improving the service performance of the high-flow regulating needle valve.

[0061] When it is necessary to adjust the high-flow regulating needle valve to switch from the open state to the closed state, first drive the valve stem 3 to move upward. The valve stem 3 synchronously drives the regulating sleeve 2, the valve core 4, and the elastic protective sleeve 6 to move upward. The distance between the regulating sleeve 2 and the valve cap 101 becomes shorter, compressing the elastic member. To avoid affecting the reset of the elastic protective sleeve 6, the second annular protrusion 6011 can be made of an elastic material, such as rubber. When the valve stem 3 moves to a position where the first annular protrusion 1022 and the second annular protrusion 6011 form a stop fit, since the slider is located at the bottom end of the chute, the elastic protective sleeve 6 cannot move downward relative to the valve stem 3. At this time, as the valve stem 3 continues to move upward, under the extrusion of the first annular protrusion 1022, the second annular protrusion 6011 undergoes elastic deformation and synchronously moves upward with the valve stem 3 to cross over the first annular protrusion 1022.

[0062] After the second annular protrusion 6011 crosses over the first annular protrusion 1022, release the valve stem 3. Under the action of the elastic member, the regulating sleeve 2 drives the valve stem 3 to move downward synchronously through the thread fit with the valve stem 3. The valve stem 3 synchronously drives the valve core 4 and the elastic protective sleeve 6 to move downward, as Figure 6 and Figure 7 shown, until the first annular protrusion 1022 and the second annular protrusion 6011 form a stop fit. When the valve stem 3 moves to a position where the first annular protrusion 1022 and the second annular protrusion 6011 form a stop fit, at this time, under the block of the first annular protrusion 1022, the elastic protective sleeve 6 first moves upward relative to the valve stem 3 and moves from the second position to the first position. When the elastic protective sleeve 6 is in the first position, the second annular protrusion 6011 simultaneously forms a stop fit with the third annular protrusion 301. At this time, under the action of the elastic member, the valve stem 3 continues to move downward. Under the extrusion of the first annular protrusion 1022, the second annular protrusion 6011 undergoes elastic deformation and synchronously moves downward with the valve stem 3, as Figure 2 and Figure 3 shown, until the valve core 4 contacts the valve seat 102 again, realizing the truncation of the flow channel 1021.

[0063] Repeating the above process can realize the adjustment of the on-off state of the high-flow regulating needle valve.

[0064] Optionally, distance markings can be made on the valve stem 3 to clarify the position of pulling up the valve stem 3.

[0065] Optionally, a driving cylinder can also be set, and the output shaft of the driving cylinder is fixedly arranged at the top end of the valve stem 3. In this way, the position of the valve stem 3 can be switched by an electric control method, and then the state of the high-flow regulating needle valve can be switched.

[0066] It can be understood that the driving cylinder can be set as any one of a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

[0067] In a further embodiment, to reduce the resistance when the second annular protrusion 6011 deforms and improve the smoothness of the movement of the valve stem 3, as Figure 3 shown, the inner peripheral wall of the first annular protrusion 1022 is arranged as a conical surface with the small end facing upward, and the outer peripheral wall of the second annular protrusion 6011 is arranged as a conical surface with the small end facing upward. In this way, when the second annular protrusion 6011 and the first annular protrusion 1022 form a stop fit, the conical surface of the first annular protrusion 1022 abuts against the conical surface of the second annular protrusion 6011. At this time, the conical surface of the first annular protrusion 1022 has an upward guiding effect, so that the second annular protrusion 6011 can more easily cross the first annular protrusion 1022.

[0068] In some other embodiments, the elastic protective sleeve 6 is arranged to include an outer layer 601 and an inner layer 602 which are sleeved. The outer layer 601 is an elastic sleeve-shaped structure and is sleeved on the inner layer 602; the inner layer 602 is a plastic structure and is configured to be able to support the outer layer 601.

[0069] Specifically in this embodiment, the outer layer 601 can be arranged to be made of rubber material; the inner layer 602 can be arranged to be composed of two parts. The first part is an annular structure and is arranged higher. The second part is arranged as a plurality of strip-shaped structures. The plurality of strip-shaped structures are arranged circumferentially, and the top ends of the strip-shaped structures are vertically arranged at the bottom of the first part, and the bottom ends are suspended. The second part can be arranged to be made of plastic materials such as iron, copper, etc. to be able to support the outer layer 601; the slider is arranged on the inner side wall of the second part during installation.

[0070] Optionally, the second annular protrusion 6011 can be arranged to be integrally formed with the outer layer 601 to ensure the structural strength.

[0071] In some other embodiments, the high-flow regulating needle valve is further arranged to include an anti-overdeformation component, and the anti-overdeformation component is configured to be able to reduce the acting force of the elastic member on the elastic protective sleeve 6. In this way, as Figure 5 shown, when the elastic protective sleeve 6 is in the second position and contacts the valve seat 102, at this time, the acting force of the elastic member on the regulating sleeve 2 will be sequentially transmitted to the valve seat 102 through the valve stem 3, the valve core 4, and the elastic protective sleeve 6. Under the action of the anti-overdeformation component, the acting force of the elastic member on the elastic protective sleeve 6 will be reduced. According to the principle of action and reaction, the top thrust of the valve seat 102 on the elastic protective sleeve 6 will be reduced, so that the resultant extrusion force on the elastic protective sleeve 6 can be reduced, thereby effectively avoiding the situation of excessive deformation of the elastic protective sleeve 6.

[0072] Furthermore, the anti-overdeformation component is arranged to include a plurality of partition bars 701 and a plurality of guide bars 702. The plurality of partition bars 701 are arranged circumferentially on the inner peripheral wall of the valve cap 101, and a channel 7011 is formed between adjacent partition bars 701. The partition bars 701 extend along the axial direction of the valve cap 101. The plurality of guide bars 702 are arranged circumferentially on the outer peripheral wall of the adjusting sleeve 2 and are respectively arranged corresponding to the channels 7011. Each guide bar 702 has a fixed section 7021 and an elastic section 7022. The elastic section 7022 is inclined and can undergo elastic deformation under the pushing of the partition bar 701.

[0073] Specifically in this embodiment, to ensure the rationality of the structure, the plurality of partition bars 701 are evenly arranged circumferentially to form the same channels 7011. The plurality of guide bars 702 are evenly arranged circumferentially to be arranged corresponding to the channels 7011. As Figure 10 shown, the guide bar 702 forms a "J"-shaped structure, and the fixed section 7021 is fixedly arranged on the adjusting sleeve 2. The top end of the elastic section 7022 is arranged below the fixed section 7021, and the bottom end is suspended to facilitate cooperation with the partition bar 701.

[0074] Exemplarily, the number of partition bars 701 can be set to twenty to form twenty channels 7011. Correspondingly, the number of guide bars 702 can be set to twenty and is arranged corresponding to the channels 7011.

[0075] Initially, the high-flow regulating needle valve is in the closed state. The guide bar 702 is inserted into the channel 7011, and under the pushing of the partition bar 701, the elastic section 7022 tends to be collinear with the fixed section 7021.

[0076] When it is necessary to adjust the high-flow regulating needle valve to switch from the closed state to the open state, first drive the valve stem 3 to move upward. The valve stem 3 synchronously drives the adjusting sleeve 2 to move upward. The adjusting sleeve 2 synchronously drives the guide bar 702 to move upward along the channel 7011. When the guide bar 702 disengages from the channel 7011, under its own elastic action, the elastic section 7022 automatically resets and tends to be inclined. At this time, the end of the elastic section 7022 far from the fixed section 7021 is located directly above the adjacent channel 7011, and the elastic protective sleeve 6 moves from the first position to the second position.

[0077] Then release the valve stem 3. Under the action of the elastic member, the adjusting sleeve 2 drives the valve stem 3 to move downward synchronously through the thread fit with the valve stem 3. The valve stem 3 drives the adjusting sleeve 2 to move downward synchronously, and the adjusting sleeve 2 drives the guiding strip 702 to move downward synchronously. Since the end of the elastic section 7022 far from the fixed section 7021 is located directly above the adjacent channel 7011, as the valve stem 3 moves, the guiding strip 702 is inserted between the adjacent channels 7011 and moves downward. At this time, under the pushing of the partition strip 701 corresponding to the channel 7011, the elastic section 7022 undergoes elastic deformation while driving the adjusting sleeve 2 to rotate around its own axis. At this time, under the thread fit between the adjusting sleeve 2 and the valve stem 3, the adjusting sleeve 2 moves downward relative to the valve stem 3 to release part of the elastic force of the elastic member. Subsequently, the guiding strip 702 is inserted into the channel 7011, and under the pushing of the partition strip 701, the elastic section 7022 tends to be collinear with the fixed section 7021; when the elastic protective sleeve 6 contacts the valve seat 102, since part of the elastic force of the elastic member is released, the acting force on the elastic protective sleeve 6 can be reduced. According to the principle of action and reaction, the pushing force of the valve seat 102 on the elastic protective sleeve 6 will be reduced, so that the squeezing resultant force received by the elastic protective sleeve 6 can be reduced, thereby effectively avoiding the situation of excessive deformation of the elastic protective sleeve 6.

[0078] When the high-flow regulating needle valve is in the closed state again, only drive the valve stem 3 to rotate around its own axis. Under the thread fit between the adjusting sleeve 2 and the valve stem 3, the adjusting sleeve 2 moves upward relative to the valve stem 3 to compress the elastic member, so that the force transmitted by the elastic member to the valve seat 102 through the adjusting sleeve 2 and the valve core 4 increases. According to the principle of action and reaction, the force of the valve seat 102 on the valve core 4 will increase, thereby ensuring the sealing performance between the valve core 4 and the valve seat 102.

[0079] In other embodiments, to reduce the material consumption and manufacturing cost, as Figure 8 shown, each partition strip 701 can be replaced by two circumferentially spaced partition sub-strips 7012. The volume of the two partition sub-strips 7012 is smaller than the volume of the partition strip 701, so that the material consumption can be reduced.

[0080] In some other embodiments, to improve the sealing performance between the valve core 4 and the valve seat 102 when the high-flow regulating needle valve is in the closed state, it is provided that the high-flow regulating needle valve further includes an elastic sealing ring 8. The elastic sealing ring 8 is sleeved on the elastic protective sleeve 6 and is located at one end of the elastic protective sleeve 6 close to the valve core 4. The elastic sealing ring 8 is configured to be able to seal the valve stem 3 and the valve seat 102. Thus, as Figure 3 shown, double sealing can be achieved under the combined action of the contact between the elastic sealing ring 8 and the valve core 4 and the valve seat 102.

[0081] In a further embodiment, the elastic sealing ring 8 can be arranged at the bottom of the outer layer 601.

[0082] In some other embodiments, the elastic member can also be configured as a compression spring 5.

[0083] Specifically in this embodiment, as Figure 2 shown, the top end of the compression spring 5 is arranged on the inner top wall of the valve cap 101, and the bottom end is arranged on the top surface of the adjusting sleeve 2. Under the action of the compression spring 5, the adjusting sleeve 2 has a tendency to move downward. The adjusting sleeve 2 has a tendency to drive the valve stem 3 and the valve core 4 to move downward through the threaded fit with the valve stem 3, so that the valve core 4 has a tendency to block the flow channel 1021, thereby ensuring the sealing performance between the valve core 4 and the valve seat 102 when the high-flow regulating needle valve is in the closed state.

[0084] In a further embodiment, as Figure 2 shown, the compression spring 5 and the adjusting sleeve 2 are coaxially arranged. In this way, the elastic force generated by the compression spring 5 can act on each part of the adjusting sleeve 2 evenly, thereby avoiding the phenomenon of offset or jamming of the adjusting sleeve 2 during the movement due to uneven force. On the one hand, it avoids affecting the cooperative movement accuracy of the valve stem 3, the valve core 4 and the elastic protective sleeve 6, and further avoids having a negative impact on the flow regulation accuracy of the high-flow regulating needle valve; on the other hand, it avoids aggravating the friction between the adjusting sleeve 2 and other components, causing excessive wear of the components and shortening the service life of the high-flow regulating needle valve.

[0085] In some other embodiments, to improve the sealing performance of the high-flow regulating needle valve, it is provided that the high-flow regulating needle valve further includes a first sealing member, and the first sealing member is configured to be able to seal the adjusting sleeve 2, the valve stem 3 and the valve seat 102.

[0086] Specifically in this embodiment, the first sealing member can be configured as a first sealing ring 9. As Figure 2 shown, the first sealing ring 9 is inserted into the first mounting hole, and is located below the adjusting sleeve 2, and simultaneously seals and sleeves the valve stem 3.

[0087] More specifically, to facilitate the support of the first sealing ring 9, a stepped structure is formed on the side wall of the first mounting hole.

[0088] Optionally, the number of the first sealing rings 9 can be set to be multiple to improve the sealing performance.

[0089] Exemplarily, the number of the first sealing rings 9 can be set to be four, and they are stacked in the vertical direction.

[0090] Optionally, the first sealing ring 9 can be made of any one of nitrile rubber, fluororubber or polytetrafluoroethylene.

[0091] In some other embodiments, for improving the simplicity during disassembly and repair, a threaded fit is formed between the valve cap 101 and the valve seat 102. In this way, when replacement of components is needed, the valve cap 101 can be unscrewed from the valve seat 102, and then the valve cap 101, the elastic member, the adjusting sleeve 2, the valve stem 3, the valve core 4, and the elastic protective sleeve 6 can be removed from the valve seat 102. Thus, the valve core 4 and the elastic protective sleeve 6 can be replaced separately, or the valve cap 101, the adjusting sleeve 2, the valve stem 3, the valve core 4, and the elastic protective sleeve 6 can be replaced as a whole.

[0092] Specifically in the embodiment, such as Figure 2 shown, the valve cap 101 can be arranged to be threadedly inserted into the valve seat 102.

[0093] In some other embodiments, for improving the sealing performance of the high-flow regulating needle valve, it is arranged that the high-flow regulating needle valve further includes a second sealing member, and the second sealing member is configured to be able to seal the valve cap 101, the valve seat 102, and the adjusting sleeve 2.

[0094] Specifically in this embodiment, the second sealing member can be arranged as a second sealing ring 10, such as Figure 2 shown, the second sealing ring 10 is inserted into the first installation hole, and is located below the valve cap 101, and simultaneously seals and sleeves the adjusting sleeve 2.

[0095] More specifically, for facilitating the support of the second sealing ring 10, a stepped structure is formed on the side wall of the first installation hole.

[0096] Optionally, the number of the second sealing rings 10 can be arranged to be multiple to improve the sealing performance.

[0097] Exemplarily, the number of the second sealing rings 10 can be arranged to be three and are stacked in the vertical direction.

[0098] Optionally, the second sealing ring 10 can be arranged to be made of any one of nitrile rubber, fluororubber, or polytetrafluoroethylene.

[0099] In some other embodiments, for improving the simplicity during manual operation, it is arranged that the high-flow regulating needle valve further includes a hand lever 11, and the hand lever 11 is arranged on the valve stem 3 and is located outside the valve seat 102.

[0100] Specifically in this embodiment, such as Figure 2 shown, the hand lever 11 is arranged horizontally during use for facilitating manual operation; and the hand lever 11 and the valve stem 3 can be arranged to be detachably connected for facilitating replacement of components.

[0101] Specifically, an L-shaped second installation hole is formed inside the hand lever 11. When the valve stem 3 is installed, the top end thereof is inserted into the vertical section of the second installation hole. A slot is formed on the side wall of the ejector rod of the valve stem 3. The high-flow regulating needle valve is further provided with a locking pin 12. When the locking pin 12 is installed, it is inserted into the horizontal section of the second installation hole and simultaneously inserted into the slot to connect the hand lever 11 to the valve stem 3.

[0102] In some other embodiments, the valve core 4 can be configured as a conical structure to further improve the sealing performance when the valve core 4 contacts the valve seat 102.

[0103] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0104] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A high flow regulating needle valve, characterized in that: The high flow regulating needle valve comprises: The needle valve body comprises a valve cap and a valve seat, and a flow channel for fluid flow is formed in the valve seat; The adjusting sleeve is inserted into the needle valve body and can slide along its own axis direction; The valve stem is threadedly inserted into the adjusting sleeve and can rotate around its own axis and slide along its own axis; A valve core is disposed on the valve stem and is configured to be able to separate from or contact the valve seat to change the degree of opening of the flow channel; An elastic member is arranged between the valve cap and the regulating sleeve, and the valve core has a tendency to block the flow channel under the action of the elastic member; An elastic protective sleeve is sleeved on the valve stem and can form a stopper fit with the valve stem and the valve seat respectively. The elastic protective sleeve can slide relative to the valve stem along its own axial direction and has a corresponding first position and a second position before and after sliding. The first position is farther away from the valve core than the second position. When in the second position, the elastic protective sleeve wraps the valve core. A first annular convexity is arranged in the valve seat. A second annular convexity is arranged on the elastic protective sleeve, and the second annular convexity is arranged on the outer peripheral wall of the top of the elastic protective sleeve. The second annular convexity and the first annular convexity have an overlapping area in the extension direction of the valve stem to form a stopper fit. A valve stem is provided with There is a third ring convexity, and the third ring convexity and the second ring convexity have an overlapping area in the extension direction of the valve stem to form a stop fit, and the third ring convexity and the first ring convexity do not have an overlapping area in the extension direction of the valve stem, and the second ring convexity is composed of an elastic material; a slide groove is provided on the valve stem, and the slide groove extends along the extension direction of the valve stem, and one end extends to the third ring convexity, and the other end extends to the position where the elastic protective sleeve can just completely wrap the valve core, and a slider is provided on the inner circumferential wall of the elastic protective sleeve, and the slider is slidably inserted in the slide groove, or a slide groove is provided on the inner circumferential wall of the elastic protective sleeve, and a slider is provided on the valve stem; The anti-excessive deformation component is configured to reduce the force of the elastic member on the elastic protective sleeve. The anti-excessive deformation component includes a plurality of spacers and a plurality of guide strips. The plurality of spacers are arranged circumferentially on the inner circumferential wall of the valve cap, and channels are formed between adjacent spacers. The spacers extend along the axial direction of the valve cap; the plurality of guide strips are arranged circumferentially on the outer circumferential wall of the adjustment sleeve and are respectively arranged corresponding to the channels. Each guide strip has a fixed section and an elastic section. The elastic section is inclined and can be elastically deformed under the push of the spacer.

2. The high flow regulating needle valve according to claim 1, characterized in that: The elastic protective sleeve comprises an outer layer and an inner layer which are sleeved together, wherein the outer layer is an elastic sleeve-shaped structure and is sleeved on the inner layer; the inner layer is a plastic structure and is configured to support the outer layer.

3. The high flow regulating needle valve according to claim 1, characterized in that: The high flow regulating needle valve also includes an elastic sealing ring, which is sleeved on the elastic protective sleeve and located at one end of the elastic protective sleeve close to the valve core. The elastic sealing ring is configured to seal the valve stem and the valve seat.

4. The high flow regulating needle valve according to claim 1, characterized in that: The high flow regulating needle valve further includes a first sealing member configured to seal the regulating sleeve, the valve stem and the valve seat.

5. The high flow regulating needle valve according to claim 1, characterized in that: The valve cap and the valve seat are threadedly matched.

6. The high flow regulating needle valve according to claim 1, characterized in that: The high flow regulating needle valve further includes a second sealing member configured to seal the valve cap, the valve seat and the regulating sleeve.

7. The high flow regulating needle valve according to claim 1, characterized in that: The high flow regulating needle valve further comprises a hand lever, which is arranged on the valve stem and located outside the valve seat.

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