Corrugated pipe valve structure with sealing cover

Abstract

The corrugated pipe valve structure is characterized in that a sealing part comprises a sealing cover part and a corrugated pipe functional part, the corrugated pipe functional part is arranged in the sealing cover part, the inner end of the corrugated pipe functional part in the length direction is connected with a valve rod, and the outer end of the corrugated pipe functional part in the length direction is connected to the inner wall of the outer end of the sealing cover part in the length direction; according to the corrugated pipe valve structure with the sealing cover, the sealing part comprises the sealing cover part and the corrugated pipe functional part, and the fixing ring of the sealing cover part guarantees the installation convenience of the sealing cover part; the inner end of the corrugated pipe functional part in the length direction is connected with the valve rod, and the outer end of the corrugated pipe functional part in the length direction is connected to the inner wall of the outer end of the sealing cover part in the length direction; the valve rod penetrates through the sealing part, the periphery of the valve rod is in clearance fit with the two ends of the sealing part in the length direction, and the corrugated pipe function part is arranged in the sealing cover part, so that the corrugated pipe function part is protected by the sealing cover part.

Description

Technical Field

[0001] The utility model relates to a bellows valve structure, in particular to a bellows valve structure with a sealing cover. Background Art

[0002] The unique feature of bellows sealed valves is their bellows design. This design not only enables the valve to achieve a tight seal when closed, but also improves the durability and reliability of the valve to a certain extent. In environments with high pressure, high temperature or corrosive media, bellows sealed valves can maintain their stable performance to ensure the safety and efficiency of the process.

[0003] However, the performance of bellows-sealed valves is not static. As the service time increases and the working conditions change, the valve may suffer from wear and aging, resulting in a decrease in performance. Therefore, it is very important to regularly inspect and maintain the bellows-sealed valve. By timely replacing worn parts and adjusting valve parameters, it is possible to ensure that the bellows-sealed valve always maintains the best performance.

[0004] Bellows-sealed valves are widely used in harsh piping systems with flammable, explosive, highly toxic and polluted environments. The valve stem is sealed by the dual effects of the packing and bellows, achieving zero leakage between the valve and the outside world. Traditional bellows are placed in the flow channel and are directly impacted by the medium, constantly swinging and oscillating. The bellows are continuously subjected to radial forces from the medium, thus reducing their service life. They cannot meet the requirements of tens of thousands of adjustment actions of the control valve. Utility Model Content

[0005] The main purpose of the utility model is to provide a bellows valve structure with a sealing cover, aiming to solve the problem that the bellows is placed in the flow channel, is directly impacted by the medium, keeps swinging and oscillating, and the bellows is continuously subjected to the radial force from the medium, thereby reducing its service life and being unable to meet the requirements of tens of thousands of adjustment actions under the working conditions of the regulating valve.

[0006] In order to achieve the above object, the utility model provides a bellows valve structure with a sealing cover, comprising:

[0007] A valve body having a passage passing through it, a valve seat being arranged on the passage, and a valve cover seat corresponding to the valve seat being arranged on the valve body;

[0008] A valve cover in a cylindrical shape, wherein the valve cover is detachably connected to the valve cover seat;

[0009] A valve stem assembly is mounted on the valve cover, the valve stem assembly comprises a valve stem movably arranged corresponding to the valve seat, and a valve core that cooperates with the valve seat is arranged at the inner end of the valve stem in the length direction;

[0010] The sealing part includes a sealing cover part and a bellows functional part. A fixing ring is arranged on the outer periphery of one end of the sealing cover part near the valve seat in the length direction. The fixing ring is clamped between the valve cover and the valve cover seat. The bellows functional part is arranged in the sealing cover part. The inner end of the bellows functional part in the length direction is connected to the valve stem. The outer end of the bellows functional part in the length direction is connected to the inner wall of the outer end of the sealing cover part in the length direction.

[0011] The valve stem is arranged through the sealing portion, and the outer periphery of the valve stem and both ends of the sealing portion in the length direction are clearance-fitted.

[0012] Furthermore, a flow guide hole is provided through one end of the sealing cover portion near the valve seat.

[0013] Furthermore, the bellows functional part includes a bellows, an upper sealing body and a lower sealing body, the upper sealing body is connected to one end of the sealing cover part in the length direction away from the valve cover, the outer end of the bellows in the length direction is connected to the upper sealing body, and the inner end of the bellows in the length direction is connected to the valve stem through the lower sealing body.

[0014] Furthermore, the outer diameter of the lower sealing body is greater than the outer diameter of the bellows.

[0015] Furthermore, an installation groove is provided on the upper sealing body, a positioning pin is provided in the installation groove, a guide groove is provided on the outer wall of the valve stem along the length direction, the positioning pin cooperates with the guide groove, and the installation groove is isolated from the internal space of the sealing cover.

[0016] Furthermore, the sealing cover part is welded in the middle of the length direction.

[0017] Furthermore, one end of the sealing cover portion close to the valve seat is connected to a shaft sleeve, and the valve stem is arranged through the shaft sleeve.

[0018] Furthermore, the shaft sleeve and the sealing cover portion are connected through deformation.

[0019] Furthermore, the bellows valve structure also includes a disc-shaped guide cage, a second through hole passes through the middle of the guide cage, the guide cage is clamped between the valve cover and the valve cover seat, and the valve stem assembly is arranged through the second through hole.

[0020] Furthermore, the valve core is matched with the second through hole.

[0021] The utility model provides a bellows valve structure with a sealing cover, wherein the sealing part includes a sealing cover part and a bellows functional part, and the fixing ring of the sealing cover part ensures the convenience of installation of the sealing cover part; the inner end of the bellows functional part in the length direction is connected to the valve stem, and the outer end of the bellows functional part in the length direction is connected to the inner wall of the outer end of the sealing cover part in the length direction; the valve stem is arranged through the sealing part, and the outer periphery of the valve stem and the two ends of the sealing part in the length direction are both clearance-fitted, and the bellows functional part is arranged in the sealing cover part, so that the bellows functional part is protected by the sealing cover part. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of a bellows valve structure with a sealing cover according to the first embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of a bellows functional part in a bellows valve structure with a sealing cover in the first embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the sealing cover part of the bellows valve structure with a sealing cover in the first embodiment of the utility model;

[0025] Figure 4 It is a schematic diagram of the cooperation between the valve stem and the sealing part in the bellows valve structure with a sealing cover in the first embodiment of the utility model;

[0026] Figure 5 yes Figure 4 Enlarged view of part A in the middle;

[0027] Figure 6 yes Figure 4 Enlarged view of middle part B;

[0028] Figure 7 It is a schematic diagram of the sealing cover portion of the bellows valve structure with a sealing cover in the second embodiment of the utility model.

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] 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.

[0031] Those skilled in the art will appreciate that, unless expressly stated, the singular forms "one", "said", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0032] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0033] Reference Figures 1 to 7 In one embodiment of the utility model, a bellows valve structure with a sealing cover includes:

[0034] The valve body 100 has a passage 110 passing through it. The passage 110 is provided with a valve seat 120 . The valve body 100 is provided with a valve cover seat 130 corresponding to the valve seat 120 .

[0035] The valve cover 200 is cylindrical and is detachably connected to the valve cover seat 130;

[0036] A valve stem assembly 300 is installed on the valve cover 200. The valve stem assembly 300 includes a valve stem 310 movably arranged corresponding to the valve seat 120. The inner end of the valve stem 310 in the length direction is provided with a valve core 320 that cooperates with the valve seat 120.

[0037] The sealing part includes a sealing cover part 410 and a bellows functional part 420. A fixing ring 411 is provided on the outer periphery of one end of the sealing cover part 410 near the valve seat 120 in the length direction. The fixing ring 411 is clamped between the valve cover 200 and the valve cover seat 130. The bellows functional part 420 is provided in the sealing cover part 410. The inner end of the bellows functional part 420 in the length direction is connected to the valve stem 310. The outer end of the bellows functional part 420 in the length direction is connected to the inner wall of the outer end of the sealing cover part 410 in the length direction.

[0038] The valve stem 310 is disposed through the sealing portion, and the outer periphery of the valve stem 310 and both ends of the sealing portion in the length direction are clearance-fitted.

[0039] In the prior art, the traditional bellows is placed in the flow channel and is directly impacted by the medium, causing it to sway and oscillate continuously. The bellows is continuously subjected to radial forces from the medium, thereby reducing its service life and being unable to meet the requirements of tens of thousands of adjustment actions of the regulating valve.

[0040] In the present invention, a valve body 100 is penetrated by a channel 110, and a valve seat 120 is arranged on the channel 110. A valve cover seat 130 is arranged on the valve body 100 corresponding to the valve seat 120. The structure of the valve body 100 and the layout structure of the channel 110 refer to the existing conventional design and are not the focus. For example, the valve seat 120 can be an integrated structure or a connected structure.

[0041] The valve cover 200 is cylindrical and can be detachably connected to the valve cover seat 130 , and the specific method can be a flange method or the like.

[0042] The valve stem assembly 300 is mounted on the valve cover 200, and the valve stem assembly 300 can be manually driven or electrically driven. The valve stem assembly 300 includes a valve stem 310 that is movably arranged corresponding to the valve seat 120. The inner end of the valve stem 310 in the length direction is provided with a valve core 320 that is separated and matched with the valve seat 120. The structural type or material of the valve core 320 refers to the existing conventional design and is not the focus.

[0043] The sealing part includes a sealing cover part 410 and a bellows functional part 420. A fixing ring 411 is provided on the periphery of one end of the sealing cover part 410 near the valve seat 120 in the length direction, and the fixing ring 411 is clamped between the valve cover 200 and the valve cover seat 130. By limiting the structure of the sealing cover part 410, the installation convenience of the sealing cover part 410 is improved. A fixing ring 411 similar to a flange is formed on the periphery of the sealing cover part 410. When the valve cover 200 is installed on the valve cover seat 130, the fixing ring 411 of the sealing cover part 410 is clamped, thereby completing the fixing of the sealing cover part 410. The inner end of the bellows functional part 420 in the length direction is connected to the valve stem 310, and the outer end of the bellows functional part 420 in the length direction is connected to the inner wall of the outer end of the sealing cover part 410 in the length direction. The bellows functional part 420 is arranged in the sealing cover part 410, so that the bellows functional part 420 is protected by the sealing cover part 410. The valve stem 310 is arranged through the sealing part, and the outer periphery of the valve stem 310 and both ends of the sealing part in the length direction are clearance-matched. The matching structure of the valve stem 310 at the upper and lower ends of the sealing part can be a sealing cover part 410 or a bellows functional part 420. It is particularly noted that the clearance fit size between the valve stem 310 and both ends of the sealing part in the length direction is between 0.01 mm and 1 mm; specifically, the clearance fit between the valve stem 310 and the outer end of the sealing part in the length direction can form a guiding effect, and the clearance fit between the valve stem 310 and the outer end of the sealing part in the length direction makes it less difficult for the fluid to enter the sealing cover part 410.

[0044] In summary, the sealing part includes a sealing cover part 410 and a bellows functional part 420. The fixing ring 411 of the sealing cover part 410 ensures the convenience of installation of the sealing cover part 410. The inner end of the bellows functional part 420 in the length direction is connected to the valve stem 310, and the outer end of the bellows functional part 420 in the length direction is connected to the inner wall of the outer end of the sealing cover part 410 in the length direction. The valve stem 310 is arranged through the sealing part, and the outer periphery of the valve stem 310 and the two ends of the sealing part in the length direction are both clearance-fitted. The bellows functional part 420 is arranged in the sealing cover part 410, so that the bellows functional part 420 is protected by the sealing cover part 410.

[0045] Reference Figures 3 to 4 In one embodiment, a flow guide hole 412 is provided through one end of the sealing cover portion 410 near the valve seat 120 .

[0046] In this embodiment, the guide hole 412 can conduct the pressure of the fluid into the sealing cover part 410, and the guide hole 412 is set at the bottom of the sealing cover part 410, so that when the valve body is in a closed state, the efficiency of fluid outflow in the sealing cover part 410 is improved and the retention is reduced.

[0047] In one embodiment, the bellows functional part 420 includes a bellows 421, an upper sealing body 422 and a lower sealing body 423, the upper sealing body 422 is connected to one end of the sealing cover part 410 in the length direction away from the valve cover 200, the outer end of the bellows 421 in the length direction is connected to the upper sealing body 422, and the inner end of the bellows 421 in the length direction is connected to the valve stem 310 through the lower sealing body 423.

[0048] In this embodiment, the bellows functional part 420 introduces the lower sealing body 423 and the upper sealing body 422 to facilitate the connection of the bellows 421. For example, the size of the bellows 421 cannot match the valve stem 310 and the sealing cover 410 at the same time; or the bellows 421 is convenient for operation, and the size cannot match any one of the valve stem 310 and the sealing cover 410. The connection of the bellows 421 can be achieved through the transition of the lower sealing body 423 and the upper sealing body 422. The connection method of the upper sealing body 422, the bellows 421 and the bellows 421 is preferably welding; the connection method of the lower sealing body 423, the bellows 421 and the valve stem 310 is preferably welding.

[0049] In one embodiment, the outer diameter of the lower sealing body 423 is greater than the outer diameter of the bellows 421 .

[0050] In this embodiment, since the lower sealing body 423 is disposed at the lower end of the bellows 421, the diameter of the lower sealing body 423 is increased, and the impact energy of the fluid is blocked by the lower sealing body 423, thereby protecting the bellows 421 from the impact of the external fluid.

[0051] Reference Figure 4 In one embodiment, an installation groove is provided on the upper sealing body 422, a positioning pin 424 is provided in the installation groove, a guide groove is provided on the outer wall of the valve stem 310 along the length direction, the positioning pin 424 cooperates with the guide groove, and the installation groove is isolated from the internal space of the sealing cover part 410.

[0052] In this embodiment, the positioning pin 424 is used to limit the rotation of the valve stem 310 , and at the same time, the rotation of the bellows 421 is limited, thereby protecting the bellows functional part 420 .

[0053] In one embodiment, the sealing cover portion 410 is welded in the middle of the length direction.

[0054] In this embodiment, considering that the structure of the bellows functional part 420 needs to be relatively complex in order to realize the connection between the bellows functional part 420 and the sealing cover part 410, the sealing cover part 410 is set as a welding structure in the length direction. For example, the sealing cover part 410 includes an upper cover part 414 and a lower cover part 415, both of which are barrel-shaped, and the bottoms of the upper cover part 414 and the lower cover part 415 are both provided with through holes for the valve stem 310 to pass through. The valve stem 310 can be welded to the through hole of the upper cover part 414, and the bottom of the lower cover part 415 is provided with a guide hole. The above setting of the upper cover part 414 and the lower cover part 415 reduces the difficulty of processing while preserving the use effect.

[0055] Reference Figure 4 In one embodiment, a shaft sleeve 413 is connected to one end of the sealing cover portion 410 near the valve seat 120 , and the valve stem 310 is disposed through the shaft sleeve 413 .

[0056] In this embodiment, the shaft sleeve 413 is added to reduce the processing difficulty of the sealing cover 410 and ensure the accurate movement of the valve stem 310. The specific connection between the sealing cover 410 and the shaft sleeve 413 can be various, such as physical (fixed) or chemical (welding).

[0057] In one embodiment, the shaft sleeve 413 and the sealing cover portion 410 are connected by deformation.

[0058] In this embodiment, the connection mode of the sleeve 413 is limited to reduce the installation difficulty and improve the connection strength. In a specific implementation process, the prefabricated member of the sleeve 413 is placed in the sealing cover 410, and then the sleeve 413 and / or the sealing cover 410 are deformed using a processing tool to achieve the connection between the two.

[0059] Reference Figure 1 In one embodiment, the bellows valve structure further includes a disc-shaped guide cage 500, a second through hole passing through the middle of the guide cage 500, the guide cage 500 is clamped between the valve cover 200 and the valve cover seat 130, and the valve stem assembly 300 is arranged through the second through hole.

[0060] In this embodiment, the movement of the valve stem assembly 300 is standardized by the guide cage 500, and the impact force of the fluid on the bellows functional part 420 can be reduced. At the same time, the fixing method of the guide cage 500 is set to clamping, so when the connection between the valve cover 200 and the valve cover seat 130 is completed, the fixing of the guide cage 500 can also be completed. Metal wire gaskets can be set on the interfaces of the guide cage 500, the valve cover 200 and the valve cover seat 130 to improve the sealing effect.

[0061] Reference Figure 1In one embodiment, the valve core 320 cooperates with the second through hole.

[0062] In this embodiment, the matching position of the valve stem assembly 300 and the guide cage 500 is set at the position of the valve core 320; thus, in the case of the guide cage 500, the installation and maintenance process of the valve stem 310 and the valve core 320 are simplified during the installation of the valve stem assembly 300. The connection method of the valve core 320 and the valve stem 310 can be a thread or a pin.

[0063] In summary, the utility model provides a bellows valve structure with a sealing cover, and the sealing part includes a sealing cover part 410 and a bellows functional part 420. The fixing ring 411 of the sealing cover part 410 ensures the convenience of installation of the sealing cover part 410; the inner end of the bellows functional part 420 in the length direction is connected to the valve stem 310, and the outer end of the bellows functional part 420 in the length direction is connected to the inner wall of the outer end of the sealing cover part 410 in the length direction; the valve stem 310 is arranged through the sealing part, and the outer periphery of the valve stem 310 and the two ends of the sealing part in the length direction are both clearance fit, and the bellows functional part 420 is arranged in the sealing cover part 410, so that the bellows functional part 420 is protected by the sealing cover part 410.

[0064] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A bellows valve structure with a sealing cover, characterized in that: include: A valve body (100) having a channel (110) passing through it, a valve seat (120) being arranged on the channel (110), and a valve cover seat (130) being arranged corresponding to the valve seat (120) being arranged on the valve body (100); A valve cover (200) is cylindrical, and the valve cover (200) is detachably connected to the valve cover seat (130); A valve stem assembly (300) is mounted on the valve cover (200), the valve stem assembly (300) comprising a valve stem (310) movably arranged corresponding to the valve seat (120), and a valve core (320) is arranged at the inner end in the length direction of the valve stem (310) and is engaged and separated with the valve seat (120); A sealing portion, comprising a sealing cover portion (410) and a bellows functional component (420), wherein a fixing ring (411) is provided on the outer periphery of one end of the sealing cover portion (410) close to the valve seat (120) in the length direction, and the fixing ring (411) is clamped between the valve cover (200) and the valve cover seat (130), and the bellows functional component (420) is provided in the sealing cover portion (410), wherein the inner end of the bellows functional component (420) in the length direction is connected to the valve stem (310), and the outer end of the bellows functional component (420) in the length direction is connected to the inner wall of the outer end of the sealing cover portion (410) in the length direction; The valve stem (310) is arranged to pass through the sealing portion, and the outer periphery of the valve stem (310) and both ends of the sealing portion in the length direction are clearance-fitted.

2. The bellows valve structure with a sealing cover according to claim 1, characterized in that: A flow guide hole (412) is provided through one end of the sealing cover portion (410) close to the valve seat (120).

3. The bellows valve structure with a sealing cover according to claim 1, characterized in that: The bellows functional part (420) comprises a bellows (421), an upper sealing body (422) and a lower sealing body (423); the upper sealing body (422) is connected to an end of the sealing cover (410) away from the valve cover (200) in the length direction; the outer end of the bellows (421) in the length direction is connected to the upper sealing body (422); and the inner end of the bellows (421) in the length direction is connected to the valve stem (310) via the lower sealing body (423).

4. The bellows valve structure with a sealing cover according to claim 3, characterized in that: The outer diameter of the lower sealing body (423) is greater than the outer diameter of the bellows (421).

5. The bellows valve structure with a sealing cover according to claim 3, characterized in that: The upper sealing body (422) is provided with an installation groove, a positioning pin (424) is provided in the installation groove, the outer wall of the valve stem (310) is provided with a guide groove along the length direction, the positioning pin (424) cooperates with the guide groove, and the installation groove is isolated from the internal space of the sealing cover part (410).

6. The bellows valve structure with a sealing cover according to claim 1, characterized in that: The sealing cover part (410) is welded in the middle of the length direction.

7. The bellows valve structure with a sealing cover according to claim 1, characterized in that: One end of the sealing cover portion (410) close to the valve seat (120) is connected to a shaft sleeve (413), and the valve stem (310) is arranged through the shaft sleeve (413).

8. The bellows valve structure with a sealing cover according to claim 7, characterized in that: The shaft sleeve (413) and the sealing cover portion (410) are connected through deformation.

9. The bellows valve structure with a sealing cover according to any one of claims 1 to 8, characterized in that: The bellows valve structure further comprises a disc-shaped guide cage (500), a second through hole passing through the middle of the guide cage (500), the guide cage (500) being clamped between the valve cover (200) and the valve cover seat (130), and the valve stem assembly (300) being arranged through the second through hole.

10. The bellows valve structure with a sealing cover according to claim 9, characterized in that: The valve core (320) is matched with the second through hole.

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