Flow control component

Abstract

The utility model discloses a flow control component which comprises a valve body, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core, a valve core and a valve core, the manual lifting driving assembly is arranged at the top of the valve body; the valve element assembly is arranged between the valve body and the manual lifting driving assembly, the valve element assembly is fixedly connected with a lifting valve rod on the manual lifting driving assembly, and the valve element assembly is used for driving the valve element assembly to move up and down so as to block or connect the medium flow channel; the corrugated diaphragm ring is fixed to the valve element assembly, and the edge of the corrugated diaphragm ring is fixed to the interior of the valve body so as to isolate media in the medium flow channel from making contact with the manual lifting driving assembly. According to the flow control component, the corrugated diaphragm ring with large deformation is used for replacing a corrugated pipe, impurity particles can be prevented from being generated in the long-term use process, the cleanliness of a flow channel is guaranteed, the flow control component can move upwards along with the valve element assembly in a larger stroke, and then the use requirement for large flow can be met.

Description

Technical Field

[0001] This utility model relates to the field of valve component technology, and more specifically to a flow control component. Background Technology

[0002] In the semiconductor industry, flow control components such as diaphragm valves, pressure reducing valves, and flow meters require ultra-cleanliness. During operation, the internal flow channels and gas-contacting parts must be free of impurities. Existing high-flow-rate manual diaphragm valves contain bellows components welded together from multiple diaphragms. The bellows act as a seal, preventing the medium from contacting other parts inside the valve body. During operation, the entire welded bellows component is in contact with the medium within the flow channel. Over long-term operation, numerous weld seams are subject to corrosion and impact from the medium, causing tiny particles to detach from the bellows, thus affecting the cleanliness of the medium. Furthermore, existing springless manual diaphragm valves, lacking an internal spring mechanism, have a limited actuation stroke, which in turn limits the flow rate.

[0003] Therefore, how to provide a flow control component that can avoid the generation of impurity particles and improve the cleanliness of the flow channel is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a flow control component that can avoid the generation of impurity particles and improve the cleanliness of the flow channel.

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

[0006] A flow control component, comprising:

[0007] The valve body has a medium flow channel inside, and the two ends of the medium flow channel are a medium inlet and a medium outlet, respectively.

[0008] A manual lifting drive assembly is disposed on the top of the valve body;

[0009] A valve core assembly is disposed between the valve body and the manual lifting drive assembly, and the valve core assembly is fixedly connected to the lifting valve stem on the manual lifting drive assembly, for driving the valve core assembly to move up and down to block or open the medium flow channel;

[0010] A corrugated diaphragm ring is fixed to the valve core assembly, and the edge of the corrugated diaphragm ring is fixed to the inner wall of the valve body to isolate the medium in the medium flow channel from contact with the manual lifting drive assembly.

[0011] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a flow control component. In use, rotating the manual lifting drive assembly in the forward direction causes the lifting valve rod on the manual lifting drive assembly to move the valve core assembly upward, thereby connecting the medium flow channel. Rotating the manual lifting drive assembly in the reverse direction causes the lifting valve rod on the manual lifting drive assembly to move the valve core assembly downward, thereby blocking the medium flow channel. Therefore, the flow control component of this utility model uses manual operation to control opening and closing, requiring no external air source, and has a compact and simple structure. Furthermore, using a corrugated diaphragm ring with greater deformation instead of a bellows not only allows it to move upward with a greater stroke following the valve core assembly, thus meeting the requirements for high flow rates, but also effectively avoids the problem of existing valve bodies using bellows made by ordinary welding, where the bellows are corroded by the medium, resulting in the generation of tiny impurity particles that contaminate the cleanliness of the medium flow channel.

[0012] Furthermore, the valve body has a mounting port at its top end that communicates with the medium flow channel, and the inner wall of the mounting port has a press-fit inner flange. The manual lifting drive assembly includes:

[0013] A diaphragm sealing press seat presses the edge of the corrugated diaphragm ring onto the inner flange of the press seat;

[0014] A valve cover sleeve is pressed against the top of the diaphragm seal press seat, and the bottom outer wall of the valve cover sleeve has a press-fit outer flange;

[0015] A valve cover crimping nut is screwed and fixed to the top outer wall of the valve body, and the valve cover crimping nut is crimped to the crimping outer flange;

[0016] A rotating valve stem is rotatably disposed in the sleeve hole of the valve cover sleeve. The rotating valve stem is provided with a retaining ring to prevent it from falling off. The inner wall of the sleeve hole has a first stop flange, and the outer wall of the rotating valve stem has a second stop flange. The second stop flange abuts against the first stop flange. The first threaded hole at the bottom end of the rotating valve stem is threadedly connected to the top of the lifting valve stem.

[0017] A manually rotating cap is fixedly connected to the top of the rotating valve stem by a fixing screw.

[0018] The beneficial effects of the above technical solution are as follows: When the manual rotating cap is rotated in the forward direction, it drives the rotating valve stem to rotate. Because the rotating valve stem and the lifting valve stem are connected by a threaded transmission, and the valve core assembly of the lifting valve stem is fixed, and the valve core assembly is fixed to the corrugated diaphragm ring, which is pressed against the diaphragm sealing pressure seat and the valve body, the lifting valve stem cannot rotate. When the rotating valve stem rotates in the forward direction, it can drive the lifting valve stem upward, which in turn drives the valve core assembly upward, thereby opening the medium flow channel. When the manual rotating cap is rotated in the reverse direction, it can drive the lifting valve stem downward, which in turn drives the valve core assembly downward, thereby blocking the medium flow channel. Therefore, this utility model uses a lifting valve stem structure to achieve the opening and blocking of the medium flow channel, allowing the valve core assembly to have a large stroke, thus meeting the requirements of large flow rates.

[0019] Furthermore, the valve cover crimping nut allows the valve cover sleeve to apply uniform downward pressure to the diaphragm seal crimping seat. Through the transmission of force, the valve cover sleeve presses the diaphragm seal crimping seat tightly, which in turn presses the corrugated diaphragm ring, ultimately achieving an effective seal between the corrugated diaphragm ring, the diaphragm seal crimping seat, and the valve body, preventing media leakage.

[0020] Furthermore, an O-ring is fitted on the outer wall of the rotating valve stem to make frictional contact with the inner wall of the sleeve hole.

[0021] The beneficial effects of adopting the above technical solution are as follows: by adding an O-ring to the rotating valve stem, hard friction between metal and metal can be avoided, and soft friction between the metal and the O-ring can be formed. Furthermore, by adjusting the compression ratio of the O-ring, the damping and feel of the manually rotating cap during rotation can be improved, thus enhancing the rotation feel during manual operation and improving the user experience.

[0022] Furthermore, it also includes a limiting sleeve, which is fixedly connected to the valve cover sleeve by a tightening screw. The inner wall of the limiting sleeve has a first limiting boss, and the inner side wall of the manual rotating cap has a second limiting boss. When the manual rotating cap is rotated in both directions, the two side walls of the second limiting boss abut against the two side walls of the first limiting boss, respectively.

[0023] The beneficial effects of adopting the above technical solution are: it can limit the rotation angle of the manual rotating cap, and avoid excessive rotation of the manual rotating cap due to operational errors, thereby causing damage to the parts.

[0024] Furthermore, the medium flow channel has a sealing surface, and the valve core assembly includes:

[0025] A valve seat support is provided, wherein the second threaded hole on the top of the valve seat support is screwed and fixed to the bottom of the lifting valve stem, the corrugated diaphragm ring is sleeved on the lifting valve stem, and the bottom end of the corrugated diaphragm ring is integrally welded to the top of the valve seat support by tungsten inert gas welding. The bottom outer edge of the valve seat support has an annular mounting groove.

[0026] A valve seat ring is interference-fitted into the mounting groove. The valve seat ring contacts or disconnects from the sealing surface to block or open the medium inlet and the medium outlet.

[0027] The beneficial effects of adopting the above technical solution are: the corrugated diaphragm ring and the valve seat support are welded together as a whole by tungsten inert gas arc welding, which ensures the sealing performance while also ensuring the strength and life of the connection structure.

[0028] Furthermore, the manual lifting drive assembly also includes: a diaphragm retaining ring sleeved on the lifting valve stem, the lifting valve stem having a snap-fit ​​limiting flange on its stem wall, the top surface of the diaphragm retaining ring snapping onto the snap-fit ​​limiting flange, and the corrugated diaphragm ring pressing between the bottom end of the diaphragm retaining ring and the top end of the valve seat support.

[0029] The beneficial effects of adopting the above technical solution are: when the lifting valve stem moves upward, the top of the diaphragm fixing ring can abut against the diaphragm sealing pressure seat, which can limit the upward movement of the lifting valve stem, avoid the problem of prolonged operation time caused by continuous rotation of the manual rotating cap, and avoid the problem of excessive deformation of the corrugated diaphragm ring and damage.

[0030] Furthermore, the corrugated diaphragm ring has a multi-layered structure.

[0031] The beneficial effects of adopting the above technical solution are: it can increase the operating pressure of the corrugated diaphragm ring and extend its service life, avoiding premature breakage and damage. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a flow control component provided by this utility model.

[0034] Figure 2 This is a schematic diagram of the assembly of the valve seat support and the corrugated diaphragm ring.

[0035] Figure 3 This is a schematic diagram of the limiting sleeve.

[0036] Figure 4 This is a schematic diagram of the manually rotating cap. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] like Figures 1-4 As shown, this utility model embodiment discloses a flow control component, including:

[0039] Valve body 1, the valve body 1 has a medium flow channel 101 inside, the two ends of the medium flow channel 101 are a medium inlet 1011 and a medium outlet 1012, respectively;

[0040] Manual lifting drive assembly 2 is located on the top of valve body 1;

[0041] Valve core assembly 3 is disposed between valve body 1 and manual lifting drive assembly 2, and valve core assembly 3 is fixedly connected to lifting valve stem 26 on manual lifting drive assembly 2, for driving valve core assembly 3 to move up and down to block or open medium flow channel 101.

[0042] The corrugated diaphragm ring 4 is fixed on the valve core assembly 3, and the edge of the corrugated diaphragm ring 4 is fixed on the inner wall of the valve body 1 to isolate the medium in the medium flow channel 101 from contact with the manual lifting drive assembly 2.

[0043] In a specific embodiment, the top of the valve body 1 has a mounting port 102 communicating with the medium flow channel 101, and the inner wall of the mounting port 102 has a pressing inner flange 1021. The manual lifting drive assembly 2 includes:

[0044] The diaphragm sealing press seat 21 presses the edge of the corrugated diaphragm ring 4 onto the inner flange 1021.

[0045] Valve cover sleeve 22 is pressed onto the top of diaphragm seal press seat 21, and the bottom outer wall of valve cover sleeve 22 has a press-fit outer flange 221;

[0046] The valve cover crimp nut 23 is screwed and fixed to the top outer wall of the valve body 1, and the valve cover crimp nut 23 is crimped to the crimping outer flange 221.

[0047] Rotate valve stem 24, which is rotatably disposed in the sleeve hole 222 of valve cover sleeve 22. Rotate valve stem 24 is provided with a retaining ring 25 to prevent it from falling off. The inner wall of sleeve hole 222 has a first stop flange 2221, and the outer wall of rotating valve stem 24 has a second stop flange 241. The second stop flange 241 abuts against the first stop flange 2221. The first threaded hole 242 at the bottom end of rotating valve stem 24 is threadedly connected to the top of lifting valve stem 26.

[0048] The manual rotating cap 27 is fixedly connected to the top of the rotating valve stem 24 by a fixing screw 28.

[0049] An O-ring 29 is fitted on the outer wall of the rotating valve stem 24 to make frictional contact with the inner wall of the sleeve hole 222.

[0050] The flow control component also includes a limiting sleeve 30, which is fixedly connected to the valve cover sleeve 22 by a tightening screw 31. The inner wall of the sleeve opening of the limiting sleeve 30 has a first limiting boss 301, and the inner side wall of the manually rotating cap 27 has a second limiting boss 271. When the cap 27 is manually rotated in both directions, the two side walls of the second limiting boss 271 abut against the two side walls of the first limiting boss 301, respectively.

[0051] The medium flow channel 101 has a sealing surface 1013, and the valve core assembly 3 includes:

[0052] The valve seat support 32 has a second threaded hole 321 on its top end that is screwed to the bottom of the lifting valve stem 26. The corrugated diaphragm ring 4 is fitted on the lifting valve stem 26, and the bottom end of the corrugated diaphragm ring 4 is integrally welded to the top end of the valve seat support 32 by tungsten inert gas welding. This ensures both sealing performance and strength and lifespan. Furthermore, tungsten inert gas welding does not produce impurity particles at the welding position, ensuring the cleanliness of the valve body flow channel. The bottom outer edge of the valve seat support 32 has an annular mounting groove 322.

[0053] Valve seat ring 33 is interference-fitted in mounting groove 322. Valve seat ring 33 is in contact with or disconnected from sealing surface 1013 to block or conduct medium inlet 1011 and medium outlet 1012.

[0054] The manual lifting drive assembly 2 also includes: a diaphragm fixing ring 34 sleeved on the lifting valve stem 26, the lifting valve stem 26 having a snap-fit ​​limiting flange 261 on its stem wall, the top surface of the diaphragm fixing ring 34 being snapped onto the snap-fit ​​limiting flange 261, and a corrugated diaphragm ring 4 being pressed between the bottom end of the diaphragm fixing ring 34 and the top end of the valve seat support 32.

[0055] The corrugated diaphragm ring 4 has a multi-layered structure, which can be 2-3 layers. For example, two corrugated diaphragm rings can be pressed together to form a single unit. The unique corrugated diaphragm ring allows for a greater vertical movement of the diaphragm while ensuring its lifespan, thereby increasing the valve's flow rate. Furthermore, the multi-layered diaphragm seal can increase the operating pressure and extend the valve's lifespan.

[0056] The portion of the medium flow channel 101 near the medium inlet 1011 and the medium outlet 1012 is inclined downwards. The medium flow channel of this invention is processed by two-stage drilling, which can maximize the diameter of the flow channel. Furthermore, the corners of the inner wall of the flow channel are rounded, which can increase the flow rate within the flow channel under the same operating conditions and effectively reduce the flow resistance of the fluid, thereby further increasing the flow rate and meeting the high flow rate requirements of the flow control components.

[0057] The advantages of this utility model are as follows:

[0058] 1. The corrugated diaphragm ring replaces the bellows, which can not only meet the requirements of high flow rate, but also ensure that no particles are generated during the long-term use of the valve body;

[0059] 2. The first and second limiting bosses can limit the rotation angle of the manual rotating cap to prevent excessive rotation and reduce the service life of other parts;

[0060] 3. The multi-layered corrugated diaphragm ring seal can increase the operating pressure and extend the service life;

[0061] 4. Rotating the valve stem increases the friction of the O-ring, avoiding hard friction between metals and improving the feel of rotation;

[0062] 5. The valve stem is moved up and down by manual rotation, which opens and closes the valve core assembly, making operation simple.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flow control component, characterized in that, include: The valve body (1) has a medium flow channel (101) inside, and the two ends of the medium flow channel (101) are a medium inlet (1011) and a medium outlet (1012) respectively. Manual lifting drive assembly (2), which is disposed on the top of the valve body (1); Valve core assembly (3), the valve core assembly (3) is disposed between the valve body (1) and the manual lifting drive assembly (2), and the valve core assembly (3) is fixedly connected to the lifting valve rod (26) on the manual lifting drive assembly (2), for driving the valve core assembly (3) to move up and down to block or connect the medium flow channel (101); A corrugated diaphragm ring (4) is fixed on the valve core assembly (3). The edge of the corrugated diaphragm ring (4) is fixed on the inner wall of the valve body (1) to isolate the medium in the medium flow channel (101) from contact with the manual lifting drive assembly (2).

2. A flow control component according to claim 1, characterized in that, The valve body (1) has a mounting port (102) at its top end that communicates with the medium flow channel (101), and the inner wall of the mounting port (102) has a pressing inner flange (1021). The manual lifting drive assembly (2) includes: A diaphragm sealing press seat (21) presses the edge of the corrugated diaphragm ring (4) onto the inner flange (1021); Valve cover sleeve (22), which is pressed against the top of the diaphragm seal press seat (21), and the bottom outer wall of the valve cover sleeve (22) has a press-fit outer flange (221); A valve cover crimp nut (23) is screwed to the top outer wall of the valve body (1) and crimped to the crimping outer flange (221). Rotary valve stem (24) is rotatably disposed in the sleeve hole (222) of the valve cover sleeve (22). The rotating valve stem (24) is provided with a retaining ring (25) to prevent it from falling off. The inner wall of the sleeve hole (222) has a first stop flange (2221), and the outer wall of the rotating valve stem (24) has a second stop flange (241). The second stop flange (241) abuts against the first stop flange (2221). The first threaded hole (242) at the bottom end of the rotating valve stem (24) is threadedly connected to the top of the lifting valve stem (26). Manually rotating cap (27) is fixedly connected to the top of the rotating valve stem (24) by a fixing screw (28).

3. A flow control component according to claim 2, characterized in that, An O-ring (29) is fitted on the outer wall of the rotating valve stem (24) to rub against the inner wall of the sleeve hole (222).

4. A flow control component according to claim 2, characterized in that, It also includes a limiting sleeve (30), which is fixedly connected to the valve cover sleeve (22) by a tightening screw (31). The inner wall of the sleeve opening of the limiting sleeve (30) has a first limiting boss (301), and the inner side wall of the manual rotating cap (27) has a second limiting boss (271). When the manual rotating cap (27) is rotated in both directions, the two side walls of the second limiting boss (271) abut against the two side walls of the first limiting boss (301).

5. A flow control component according to any one of claims 2-4, characterized in that, The medium flow channel (101) has a sealing surface (1013), and the valve core assembly (3) includes: A valve seat support (32) is provided. The second threaded hole (321) on the top of the valve seat support (32) is screwed and fixed to the bottom of the lifting valve stem (26). The corrugated diaphragm ring (4) is sleeved on the lifting valve stem (26). The bottom end of the corrugated diaphragm ring (4) is integrally welded to the top of the valve seat support (32) by tungsten inert gas arc welding. The bottom outer edge of the valve seat support (32) has an annular mounting groove (322). A valve seat ring (33) is press-fitted into the mounting groove (322). The valve seat ring (33) contacts or disconnects from the sealing surface (1013) to block or open the medium inlet (1011) and the medium outlet (1012).

6. A flow control component according to claim 5, characterized in that, The manual lifting drive assembly (2) further includes: a diaphragm fixing ring (34) sleeved on the lifting valve stem (26), the lifting valve stem (26) has a locking limiting flange (261) on its stem wall, the top surface of the diaphragm fixing ring (34) is locked onto the locking limiting flange (261), and the corrugated diaphragm ring (4) is pressed between the bottom end of the diaphragm fixing ring (34) and the top end of the valve seat support (32).

7. A flow control component according to any one of claims 2-4 and 6, characterized in that, The corrugated diaphragm ring (4) is a multi-layered structure.

8. A flow control component according to any one of claims 2-4 and 6, characterized in that, The portion of the medium flow channel (101) near the medium inlet (1011) and the medium outlet (1012) is inclined downward.

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