Electrodeless speed regulating valve

Abstract

This utility model discloses a stepless speed regulating valve, including a valve seat, a valve core structure, a drive structure, and an adjusting structure. The valve seat has a first chamber, an inlet channel communicating with the first chamber, an outlet channel, and an open end. The inlet channel has a first end adjacent to the first chamber. The valve core structure is sealed to the open end of the valve seat, and the valve core structure faces the first end of the inlet channel. The drive structure includes a drive body and a drive shaft, which are drively connected to the drive body. One end of the drive shaft is drively connected to the valve core structure. The adjusting structure includes a screw and an adjusting nut. The screw is located on the side of the drive body away from the valve core structure and is fixedly connected to the end of the drive shaft away from the valve core structure. The adjusting nut is screwed to the screw to adjust the distance between the adjusting nut and the drive body. The drive body can drive the drive shaft to move the valve core structure toward the first end until the adjusting nut abuts against the drive body to adjust the flow rate of the inlet channel, thereby realizing stepless speed regulation during fluid filling.

Description

Technical Field

[0001] This utility model relates to the field of filling equipment technology, and in particular to a stepless speed regulating valve. Background Technology

[0002] A filling machine is a device used to fill fluids into packaging containers, commonly used for filling various beverages, edible oils, and some daily chemical products. A filling valve typically consists of a valve body and a valve core. The valve body contains a valve cavity, and a valve port at the bottom of the valve body connects to the valve cavity. The valve core is housed within the valve body, and its lower end has a sealing component for sealing the valve port. An inlet port on the valve body connects to the valve cavity. The valve core extends out of the valve body and is connected to a switching drive device. Driven by the switching drive device, the valve core can move up and down within the valve cavity, allowing the sealing component on the valve core to seal the valve port (closing the valve) or move away from the valve port (opening the valve).

[0003] When using current filling machines to fill fluids into containers, the movement speed of the valve core cannot be controlled; that is, the opening and closing speeds of the valve cannot be adjusted. Excessive valve opening or too rapid valve closing can easily cause fluid splashing. Furthermore, because the position of the valve core movement is not adjustable, the opening degree of the filling valve is fixed, making it impossible to adapt to the filling of fluids with different characteristics. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a stepless speed regulating valve that can achieve stepless speed regulation without the need for external feedback.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A stepless speed regulating valve is provided, including a valve seat, a valve core structure, a drive structure, and a regulating structure.

[0007] The valve seat has a first chamber, an inlet channel communicating with the first chamber, an outlet channel, and an open end, wherein the inlet channel has a first end adjacent to the first chamber;

[0008] The valve core structure is sealed to the open end of the valve seat, and the valve core structure is directly opposite the first end of the inlet channel;

[0009] The drive structure includes a drive body and a drive shaft, the drive shaft is drivenly connected to the drive body, and one end of the drive shaft is drivenly connected to the valve core structure.

[0010] The adjustment structure includes a screw and an adjusting nut. The screw is located on the side of the drive body away from the valve core structure and is fixedly connected to the end of the drive shaft away from the valve core structure. The adjusting nut is screwed to the screw to adjust the distance between the adjusting nut and the drive body. The drive body can drive the drive shaft to move the valve core structure toward the first end until the adjusting nut abuts against the drive body to adjust the flow rate of the inlet channel.

[0011] As a further embodiment of the stepless speed control valve, the adjustment structure further includes an annular rubber pad. The adjusting nut has a first mounting groove on the side facing the drive body. The annular rubber pad is located in the first mounting groove and is sleeved on the drive shaft. The thickness of the annular rubber pad is greater than the depth of the mounting groove.

[0012] As a further embodiment of the stepless speed control valve, the adjustment structure further includes a fastening screw. A fastening groove is formed on the outer periphery of the adjusting nut and along its radial direction. A second threaded hole is formed at the end of the adjusting nut away from the drive body, which cooperates with the fastening screw. The second threaded hole is adjacent to the edge of the adjusting nut. The threaded hole penetrates one side of the groove wall of the fastening groove and extends into the groove wall of the fastening groove adjacent to the drive body. The fastening screw is screwed into the second threaded hole to prevent the screw from rotating relative to the adjusting nut.

[0013] As a further embodiment of the stepless speed control valve, the valve core structure includes a valve core and a diaphragm. The valve core is drivenly connected to the drive shaft. The diaphragm includes a core sleeve and an annular elastic deformation portion. The core sleeve is connected to the valve core. The inner circumference of the elastic deformation portion is connected to the core sleeve. The outer circumference of the elastic deformation portion is sealed to the open end. The drive structure can drive the valve core to move the core sleeve toward or away from the first end.

[0014] As a further embodiment of the stepless speed control valve, the end of the core sleeve facing the first end is a tapered structure, and the cross-sectional dimension of the tapered structure gradually decreases along its radial direction near the first end. The first end of the inlet channel is a tapered hole structure that cooperates with the tapered structure.

[0015] As a further embodiment of the stepless speed control valve, the valve core includes a valve core body, a first threaded section and a second threaded section. The first threaded section is fixedly connected to one end of the valve core body facing the drive shaft, and the first threaded section is threadedly screwed onto the drive shaft. The second threaded section is fixedly connected to one end of the valve core body away from the first threaded section, and the second threaded section is threadedly screwed onto the core sleeve.

[0016] As a further embodiment of the stepless speed control valve, it also includes a separator seat. The drive body is fixedly connected to the valve seat through the separator seat. The separator seat has a first clearance hole on its axis. The first threaded section passes through the first clearance hole and is threadedly connected to the drive shaft. A second chamber is formed between the separator seat and the diaphragm. The separator seat has a balance hole that communicates with the second chamber.

[0017] As a further embodiment of the stepless speed control valve, the valve core structure further includes an anti-rotation block located within the first clearance hole. The drive shaft is engaged with the first clearance hole via the anti-rotation block to restrict the rotation of the drive shaft.

[0018] As a further embodiment of the stepless speed control valve, the wall of the first clearance hole is provided with a groove along the axial direction of the drive shaft, and at least one end of the groove along the axial direction of the drive shaft passes through the partition seat. The outer periphery of the anti-rotation block is provided with a snap-fit ​​protrusion, and the snap-fit ​​protrusion engages with the groove. The anti-rotation block is provided with a second clearance hole along the axial direction of the drive shaft, and the wall of the second clearance hole is provided with a limiting protrusion. The outer periphery of the drive shaft is provided with a limiting notch that engages with the limiting protrusion. The drive shaft passes through the second clearance hole and is threadedly connected to the first threaded section.

[0019] As a further embodiment of the stepless speed control valve, the open end ring is provided with a first sealing ring, and the partition seat is fixedly connected to the valve seat by bolts, with the partition seat pressing the outer edge of the elastic deformation part against the open end.

[0020] Beneficial effects:

[0021] In this invention, the drive shaft is used to drive the valve core structure to move along the axis. The drive shaft is fixedly connected to the screw. After the adjusting nut is screwed onto the screw, the axial movement of the drive shaft will drive the screw and the adjusting nut to move axially together. When the adjusting nut abuts against the drive body, the drive shaft stops moving. At this time, the position between the valve core structure and the inlet channel remains relatively fixed, the flow rate of the inlet channel remains fixed, and the fluid filling speed of the stepless speed regulating valve remains stable. When it is necessary to adjust the filling speed, the adjusting nut is turned to adjust the distance between the adjusting nut and the drive body. Since this distance can be infinitely adjusted within the maximum stroke range of the adjusting nut along the axis, the flow rate of the inlet channel and the filling speed of the stepless speed regulating valve can also be infinitely adjusted.

[0022] In this invention, when the drive shaft pushes the valve core to move axially, the core sleeve drives the elastic deformation part to stretch / compress axially. The elastic deformation of the elastic deformation part adapts to the displacement of the valve core, avoiding metal friction between the valve core and the valve seat, reducing wear, and at the same time, statically sealing the outer periphery of the elastic deformation part with the valve seat, achieving complete isolation between the first chamber and the drive structure, and eliminating the leakage risk of traditional packing seals. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the stepless speed regulating valve described in an embodiment of the present invention;

[0025] Figure 2 This is an exploded view of the stepless speed regulating valve described in an embodiment of the present utility model;

[0026] Figure 3 This is a cross-sectional schematic diagram of the stepless speed regulating valve described in an embodiment of the present utility model;

[0027] Figure 4 This is a schematic diagram of the valve seat structure according to an embodiment of the present utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the adjusting nut described in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the diaphragm structure according to an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the separator seat described in an embodiment of the present utility model;

[0031] Figure 8 This is a schematic diagram of the anti-rotation block described in an embodiment of the present invention.

[0032] In the picture:

[0033] 100. Valve seat; 101. First chamber; 102. Inlet channel; 103. Outlet channel; 104. Open end; 105. Annular limiting groove; 106. Annular flange;

[0034] 200. Valve core structure; 210. Valve core; 211. Valve core body; 212. First threaded section; 213. Second threaded section; 220. Diaphragm; 221. Core sleeve; 222. Elastic deformation part; 223. Flanged edge;

[0035] 300. Drive structure; 310. Drive body; 320. Drive shaft; 321. Limiting notch;

[0036] 400. Adjustment structure; 410. Screw; 420. Adjusting nut; 4201. First threaded hole; 4202. Mounting groove; 4203. Fastening groove; 4204. Second threaded hole; 4205. Clamping groove; 430. Annular rubber pad; 440. Fastening screw;

[0037] 500, partition seat; 501, first clearance hole; 502, second chamber; 503, balance hole; 504, slot; 505, first step; 506, second step;

[0038] 610 Anti-rotation block; 611 Second clearance hole; 620 Snap-fit ​​protrusion; 630 Limiting protrusion;

[0039] 710. First sealing ring; 720. Second sealing ring; 730. Third sealing ring;

[0040] 810, First flange; 820, Second flange. Detailed Implementation

[0041] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationships shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are merely used for distinction in description and have no special meaning.

[0045] like Figures 1 to 4 As shown, the stepless speed regulating valve of this embodiment includes a valve seat 100, a valve core structure 200, a drive structure 300, and an adjustment structure 400. The valve seat 100 has a first chamber 101, an inlet channel 102 communicating with the first chamber 101, an outlet channel 103, and an open end 104. The inlet channel 102 has a first end adjacent to the first chamber 101. The valve core structure 200 is sealed to the open end 104 of the valve seat 100, and the valve core structure 200 faces the first end of the inlet channel 102. The drive structure 300 includes a drive body 310 and a drive shaft 320. The drive shaft 320 is driveably connected to the drive body 310, and one end of the drive shaft 320 is driveably connected to the valve core structure 200. The adjusting structure 400 includes a screw 410 and an adjusting nut 420. The screw 410 is located on the side of the drive body 310 away from the valve core structure 200 and is fixedly connected to the end of the drive shaft 320 away from the valve core structure 200. The adjusting nut 420 is screwed to the screw 410 to adjust the distance between the adjusting nut 420 and the drive body 310. The drive body 310 can drive the drive shaft 320 to move the valve core structure 200 toward the first end until the adjusting nut 420 abuts against the drive body 310, thereby adjusting the flow rate of the inlet channel 102.

[0046] In this embodiment, the valve core structure 200 is sealed to the open end 104 of the valve seat 100 to prevent fluid from leaking through the open end 104 after entering the first chamber 101 through the inlet channel 102, so that the fluid in the first chamber 101 can only flow out through the outlet channel 103. The drive shaft 320 is used to drive the valve core structure 200 to move along the axis. The drive shaft 320 is fixedly connected to the screw 410. After the adjusting nut 420 is screwed to the screw 410, the axial movement of the drive shaft 320 will drive the screw 410 and the adjusting nut 420 to move together along the axis. When the adjusting nut 420 abuts against the drive body 310, the drive shaft 320 stops moving. At this time, the position between the valve core structure 200 and the inlet channel 102 remains relatively fixed, the flow rate of the inlet channel 102 remains fixed, and the fluid filling speed of the stepless speed regulating valve remains stable. When it is necessary to adjust the filling speed, the adjusting nut 420 is turned to adjust the distance between the adjusting nut 420 and the drive body 310. Since this distance can be infinitely adjusted within the maximum stroke range of the adjusting nut 420 along the axis, the flow rate of the inlet channel 102 and the filling speed of the entire stepless speed regulating valve can also be infinitely adjusted accordingly.

[0047] In this embodiment, the adjusting nut 420 is used to adjust the closure degree of the valve core structure 200 to the inlet channel 102 by limiting the maximum stroke of the drive shaft 320 along its axial direction. Specifically, when the adjusting nut 420 is screwed to the nearest end of the screw 410 (located at the end of the screw 410 away from the drive body 310), the inlet channel 102 is fully open, and the flow rate is maximum; when the adjusting nut 420 is screwed to the farthest end of the screw 410 (located at the end of the screw 410 adjacent to the drive body 310), the inlet channel 102 is completely closed, and the flow rate is minimum (flow rate is 0). Compared with the prior art, the stepless speed regulating valve of this embodiment achieves stepless speed regulation without external feedback through ingenious structural design, which can stably control the filling speed and reduce manufacturing costs while ensuring reliability.

[0048] Optionally, the drive structure 300 can be a pneumatic cylinder or a hydraulic cylinder, wherein the drive body 310 is the cylinder body, the drive shaft 320 is the piston rod, and the stroke of the piston rod is fixed. The conventional stroke control method uses a sensor. In this embodiment, by setting an adjustment structure 400 connected to the piston rod, the closure degree of the valve core structure 200 to the inlet channel 102 is controlled by the adjustment structure 400 to achieve flow regulation of the inlet channel 102.

[0049] In this embodiment, the adjusting nut 420 has a first threaded hole 4201 at its shaft center that is screwed into the screw 410.

[0050] Furthermore, such as Figure 2 and Figure 3As shown, the adjustment structure 400 also includes an annular rubber pad 430. The adjustment nut 420 has an installation groove 4202 on the side facing the drive body 310. The annular rubber pad 430 is located in the installation groove 4202 and is sleeved on the drive shaft 320. The thickness of the annular rubber pad 430 is greater than the depth of the installation groove 4202.

[0051] In this embodiment, the annular rubber pad 430 is disposed in the mounting groove 4202 on the side of the adjusting nut 420 facing the drive body 310 and protrudes from the adjusting nut 420. On the one hand, when the drive shaft 320 drives the screw 410 and the adjusting nut 420 to move until the annular rubber pad 430 abuts against the drive body 310, the annular rubber pad 430 is compressed to form an elastic buffer layer, avoiding rigid collision between the adjusting nut 420 and the drive body 310, reducing vibration and noise, improving the reliability and environmental adaptability of the stepless speed control valve, and extending the life of the stepless speed control valve. On the other hand, the annular rubber pad 430 is sleeved on the drive shaft 320, which can fill the small gap between the adjusting nut 420 and the drive shaft 320, preventing external dust / fluid from entering the transmission area of ​​the screw 410, or internal fluid from seeping out along the drive shaft 320 (if the first chamber 101 contains high-pressure fluid).

[0052] Furthermore, such as Figure 3 and Figure 5 As shown, the adjustment structure 400 also includes a fastening screw 440. The outer periphery of the adjusting nut 420 is provided with a fastening groove 4203 along its radial direction. The end of the adjusting nut 420 away from the drive body 310 is provided with a second threaded hole 4204 that cooperates with the fastening screw 440. The second threaded hole 4204 is adjacent to the edge of the adjusting nut 420. The second threaded hole 4204 passes through one side of the groove wall of the fastening groove 4203 and extends into the groove wall of the fastening groove 4203 adjacent to the drive body 310. The fastening screw 440 is screwed into the second threaded hole 4204 to prevent the screw 410 from rotating relative to the adjusting nut 420.

[0053] In this embodiment, a fastening groove 4203 is provided on the outer periphery of the adjusting nut 420 and along its radial direction. A second threaded hole 4204 is provided at the end of the adjusting nut 420 away from the drive body 310 and at the edge of the adjusting nut 420, extending to the far end of the groove wall of the fastening groove 4203 (the side wall of the fastening groove 4203 adjacent to the drive body 310). After the fastening screw 440 is screwed into the second threaded hole 4204, it radially presses the screw 410, compressing the surface of the screw 410 to generate friction, causing the internal thread of the first threaded hole 4201 corresponding to the screw 410 to deform, thereby increasing the preload between the screw 410 and the adjusting nut 420, eliminating the risk of relative rotation between the adjusting nut 420 and the screw 410, preventing the threads from loosening due to vibration or fluid impact (such as in the case of pipeline vibration), and ensuring the long-term stability of the flow rate setting value.

[0054] Specifically, the adjusting nut 420 in this embodiment also has a clamping groove 4205 on its outer periphery, which facilitates the tightening of the adjusting nut 420 by clamping it with a wrench.

[0055] Furthermore, such as Figure 2 and Figure 6 As shown, the valve core structure 200 includes a valve core 210 and a diaphragm 220. The valve core 210 is connected to the drive shaft 320. The diaphragm 220 includes a core sleeve 221 and an annular elastic deformation portion 222. The core sleeve 221 is connected to the valve core 210. The inner circumference of the elastic deformation portion 222 is connected to the core sleeve 221. The outer circumference of the elastic deformation portion 222 is sealed to the open end 104. The drive structure 300 can drive the valve core 210 to move the core sleeve 221 toward the direction of approaching or moving away from the first end.

[0056] Among them, the elastic deformation part 222 is a bent structure. When the drive shaft 320 pushes the valve core 210 to move axially, the core sleeve 221 drives the elastic deformation part 222 to be stretched / compressed axially. The elastic deformation of the elastic deformation part 222 adapts to the displacement of the valve core 210, avoids metal friction between the valve core 210 and the valve seat 100, and reduces wear. At the same time, the outer periphery of the elastic deformation part 222 and the valve seat 100 are statically sealed, completely isolating the first chamber 101 from the drive structure 300 and eliminating the leakage risk of traditional packing seals.

[0057] Furthermore, the end of the core sleeve 221 facing the first end is a tapered structure. Along the direction close to the first end, the cross-sectional dimension of the tapered structure gradually decreases in its radial direction. The first end of the inlet channel 102 is a tapered hole structure that matches the tapered structure.

[0058] In this embodiment, the end of the core sleeve 221 facing the inlet channel 102 adopts a tapered structure, with its radial cross-sectional dimension gradually decreasing along the direction close to the inlet channel 102 (e.g., a tapered angle of 15°-60°), forming a guide sealing surface. The first end of the inlet channel 102 is machined into a tapered hole that complements the tapered structure of the core sleeve 221, forming a line contact or surface contact sealing pair. This embodiment can achieve a progressive seal of the inlet channel 102. As the tapered structure of the core sleeve 221 gradually embeds into the tapered hole, the contact area increases with the increase of displacement, eventually forming an annular sealing band, achieving zero leakage under high pressure differential. When the tapered surface of the tapered hole separates from the tapered surface of the core sleeve 221, the fluid flow channel at the first end of the inlet channel 102 becomes annularly expanding, reducing fluid turbulence and the risk of cavitation. In addition, the guiding fit between the tapered surface of the tapered hole and the tapered surface of the core sleeve 221 can reduce the motion resistance of the valve core 210 and reduce the load on the drive shaft 320.

[0059] For example, the first chamber 101 of the valve seat 100 is also a conical structure, wherein the inlet channel 102 is adjacent to the small end of the first chamber 101, and the open end 104 is located at the large end of the first chamber 101.

[0060] Furthermore, the valve core 210 includes a valve core body 211, a first threaded section 212 and a second threaded section 213. The first threaded section 212 is fixedly connected to the end of the valve core body 211 facing the drive shaft 320, and the first threaded section 212 is threadedly screwed to the drive shaft 320. The second threaded section 213 is fixedly connected to the end of the valve core body 211 away from the first threaded section 212, and the second threaded section 213 is threadedly screwed to the core sleeve 221.

[0061] By rotating the valve core body 211, the screw-in depth of the first threaded section 212 and the second threaded section 213 can be independently adjusted, thereby regulating the preload of the diaphragm 220. The second threaded section 213 controls the initial compression of the core sleeve 221 and the bent deformation portion, ensuring a tight seal; while the first threaded section 212 allows for fine-tuning of the axial position of the valve core 210 relative to the drive shaft 320. This embodiment employs a threaded connection structure, enabling quick disassembly and replacement of the valve core 210 or the diaphragm 220.

[0062] Furthermore, such as Figures 1 to 3 , Figure 7 As shown, the stepless speed regulating valve in this embodiment also includes a partition seat 500. The drive body 310 is fixedly connected to the valve seat 100 through the partition seat 500. A first clearance hole 501 is provided on the axis of the partition seat 500. A first threaded section 212 passes through the first clearance hole 501 and is threadedly connected to the drive shaft 320. A second chamber 502 is formed between the partition seat 500 and the diaphragm 220. A balance hole 503 communicating with the second chamber 502 is provided on the partition seat 500.

[0063] In this embodiment, a balance hole 503 communicating with the second chamber 502 is opened on one side of the partition seat 500. Under the action of the balance hole 503, the air pressure in the second chamber 502 is kept consistent with the external air pressure, thereby reducing the moving resistance of the valve core 210.

[0064] Furthermore, such as Figure 2 , Figure 3 as well as Figure 8 As shown, the stepless speed control valve in this embodiment also includes an anti-rotation block 610. The anti-rotation block 610 is located inside the first clearance hole 501. The drive shaft 320 is engaged with the first clearance hole 501 through the anti-rotation block 610 to restrict the rotation of the drive shaft 320.

[0065] The drive shaft 320 is engaged with the first clearance hole 501 of the partition seat 500 by the anti-rotation block 610, which can prevent the drive shaft 320 from rotating relative to the partition seat 500 and prevent the drive shaft 320 from becoming loose from the first threaded section 212.

[0066] The first clearance hole 501 has a groove 504 along the axial direction of the drive shaft 320. The groove 504 passes through the partition seat 500 at least one end along the axial direction of the drive shaft 320. The outer periphery of the anti-rotation block 610 has a snap-fit ​​protrusion 620, which snaps into the groove 504. The anti-rotation block 610 has a second clearance hole 611 along the axial direction of the drive shaft 320. The wall of the second clearance hole 611 has a limiting protrusion 630. The outer periphery of the drive shaft 320 has a limiting notch 321 that matches the limiting protrusion 630. The drive shaft 320 passes through the second clearance hole 611 and is threaded into the first threaded section 212.

[0067] The locking protrusion 620 on the outer periphery of the anti-rotation block 610 engages with the slot 504 on the wall of the first clearance hole 501 to prevent the anti-rotation block 610 from rotating. The limiting protrusion 630 on the wall of the second clearance hole 611 of the anti-rotation block 610 engages with the limiting notch 321 on the outer periphery of the drive shaft 320 to prevent the drive shaft 320 from rotating relative to the anti-rotation block 610 and the partition seat 500, so that the drive shaft 320 can only move along its axial direction, ensuring drive stability.

[0068] Furthermore, the open end 104 is provided with a first sealing ring 710, and the partition seat 500 is fixedly connected to the valve seat 100 by bolts. The partition seat 500 presses the outer edge of the elastic deformation part 222 against the open end 104.

[0069] In this embodiment, the separator 500 is fixedly connected to the valve seat 100 by bolts, thereby pressing the outer edge of the elastic deformation part 222 against the open end 104 to achieve static sealing of the open end 104 of the valve seat 100. This static seal works in conjunction with the dynamic seal of the diaphragm 220 to ensure the long-term reliability of the stepless speed regulating valve under high pressure and high frequency conditions.

[0070] For example, the open end 104 is provided with an annular limiting groove 105, and the first sealing ring 710 is disposed in the annular limiting groove 105; the valve seat 100 has an annular flange 106, which is located at the edge of the open end 104 and faces the partition seat 500. The outer periphery of the elastic deformation portion 222 and the flange 223 protruding towards the partition seat 500 are provided. Along the axial direction of the drive shaft 320, the annular flange 106 protrudes from the flange 223 on the side facing the partition seat 500. The outer periphery of the partition seat 500 and adjacent to the valve seat 100 are provided with a first step 505 and a second step 506. The flange 223 cooperates with the first step 505, and the annular flange 106 cooperates with the second step 506 to achieve sealing of the open end 104 of the valve seat 100.

[0071] Specifically, the stepless speed regulating valve in this embodiment also includes a first flange 810 and a second flange 820 installed on the outer wall of the valve seat 100. The first flange 810 corresponds to the inlet channel 102, and the second flange 820 corresponds to the outlet channel 103. The first flange 810 is connected to the filling machine through a corresponding fluid delivery pipe, and the second flange 820 is connected to the filling container through a fluid delivery pipe. According to the properties of the fluid and the requirements of the filling speed, the fluid filling speed is adjusted by the stepless speed regulating valve to achieve stable filling of the fluid.

[0072] Specifically, the valve seat 100 of this embodiment has a first outer wall, a second outer wall, a third outer wall, a fourth outer wall, a fifth outer wall, and a sixth outer wall. The first and second outer walls are connected at the ends away from the partition seat 500, and the first and second outer walls are arranged at an angle. The third outer wall is connected to the end of the first outer wall near the partition seat 500, and the fourth outer wall is connected to the end of the second outer wall near the partition seat 500, and the third and fourth outer walls are arranged opposite to each other. The edge of the fifth outer wall is connected to the first, second, third, and fourth outer walls respectively, and the edge of the sixth outer wall is connected to the first, second, third, and fourth outer walls respectively, and the fifth and sixth outer walls are arranged opposite to each other. The inlet channel 102 extends to the first outer wall at one end away from the first chamber 101. Correspondingly, the first flange 810 is fixed to the first outer wall by bolts and communicates with the inlet channel 102. The outlet channel 103 extends to the third or fourth outer wall at one end away from the first chamber 101. Correspondingly, the second flange 820 is fixed to the third or fourth outer wall by bolts and communicates with the outlet channel 103.

[0073] To maintain the sealing of the inlet channel 102 and the outlet channel 103, this embodiment also provides a second sealing ring 720 between the first flange 810 and the outer wall of the valve seat 100, and a third sealing ring 730 between the second flange 820 and the outer wall of the valve seat 100. The end of the inlet channel 102 away from the first chamber 101 is located inside the ring of the second sealing ring 720, and the end of the outlet channel 103 away from the first chamber 101 is located inside the ring of the third sealing ring 730. The first flange 810 is fastened to the outer wall of the valve seat 100 with bolts, abutting against the second sealing ring 720; the second flange 820 is fastened to the outer wall of the valve seat 100 with bolts, abutting against the third sealing ring 730.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A stepless speed regulating valve, characterized in that, include: The valve seat has a first chamber, an inlet channel communicating with the first chamber, an outlet channel, and an open end, wherein the inlet channel has a first end adjacent to the first chamber; The valve core structure is sealed to the open end of the valve seat, and the valve core structure is directly opposite the first end of the inlet channel; The drive structure includes a drive body and a drive shaft, wherein the drive shaft is drive-connected to the drive body and one end of the drive shaft is drive-connected to the valve core structure. The adjustment structure includes a screw and an adjusting nut. The screw is located on the side of the drive body away from the valve core structure and is fixedly connected to the end of the drive shaft away from the valve core structure. The adjusting nut is screwed to the screw to adjust the distance between the adjusting nut and the drive body. The drive body can drive the drive shaft to move the valve core structure toward the first end until the adjusting nut abuts against the drive body to adjust the flow rate of the inlet channel.

2. The stepless speed regulating valve according to claim 1, characterized in that, The adjustment structure also includes an annular rubber pad. The adjusting nut has a first mounting groove on the side facing the drive body. The annular rubber pad is located in the first mounting groove and is sleeved on the drive shaft. The thickness of the annular rubber pad is greater than the depth of the mounting groove.

3. The stepless speed regulating valve according to claim 1, characterized in that, The adjustment structure also includes a fastening screw. The outer periphery of the adjusting nut and a fastening groove are provided therein. The end of the adjusting nut away from the drive body is provided with a second threaded hole that mates with the fastening screw. The second threaded hole is adjacent to the edge of the adjusting nut. The threaded hole penetrates one side of the groove wall of the fastening groove and extends into the groove wall of the fastening groove adjacent to the drive body. The fastening screw is screwed into the second threaded hole to prevent the screw from rotating relative to the adjusting nut.

4. The stepless speed regulating valve according to claim 1, characterized in that, The valve core structure includes a valve core and a diaphragm. The valve core is driven by the drive shaft. The diaphragm includes a core sleeve and an annular elastic deformation portion. The core sleeve is connected to the valve core. The inner circumference of the elastic deformation portion is connected to the core sleeve. The outer circumference of the elastic deformation portion is sealed to the open end. The drive structure can drive the valve core to move the core sleeve toward the direction closer to or away from the first end.

5. The stepless speed regulating valve according to claim 4, characterized in that, The end of the core sleeve facing the first end is a tapered structure. Along the direction close to the first end, the cross-sectional dimension of the tapered structure gradually decreases in its radial direction. The first end of the inlet channel is a tapered hole structure that cooperates with the tapered structure.

6. The stepless speed regulating valve according to claim 4, characterized in that, The valve core includes a valve core body, a first threaded section and a second threaded section. The first threaded section is fixedly connected to one end of the valve core body facing the drive shaft and is threadedly connected to the drive shaft. The second threaded section is fixedly connected to one end of the valve core body away from the first threaded section and is threadedly connected to the core sleeve.

7. The stepless speed regulating valve according to claim 6, characterized in that, It also includes a partition seat, the drive body is fixedly connected to the valve seat through the partition seat, the partition seat has a first clearance hole on its axis, the first threaded section passes through the first clearance hole and is threadedly connected to the drive shaft, a second chamber is formed between the partition seat and the diaphragm, and a balance hole communicating with the second chamber is provided on the partition seat.

8. The stepless speed regulating valve according to claim 7, characterized in that, The valve core structure also includes an anti-rotation block, which is located inside the first clearance hole. The drive shaft is engaged with the first clearance hole through the anti-rotation block to restrict the rotation of the drive shaft.

9. The stepless speed regulating valve according to claim 8, characterized in that, The first clearance hole has a groove along the axial direction of the drive shaft. At least one end of the groove along the axial direction of the drive shaft passes through the partition seat. The outer periphery of the anti-rotation block has a snap-fit ​​protrusion that engages with the groove. The anti-rotation block has a second clearance hole along the axial direction of the drive shaft. The wall of the second clearance hole has a limiting protrusion. The outer periphery of the drive shaft has a limiting notch that engages with the limiting protrusion. The drive shaft passes through the second clearance hole and is threaded into the first threaded section.

10. The stepless speed regulating valve according to claim 7, characterized in that, The open end ring is provided with a first sealing ring, and the partition seat is fixedly connected to the valve seat by bolts. The partition seat presses the outer edge of the elastic deformation part against the open end.

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