High-pressure self-sealing corrugated pipe stop valve

Abstract

The utility model relates to the technical field of stop valves, in particular to a high-pressure self-sealing corrugated pipe stop valve, which comprises a valve body, a plugging mechanism and a driving mechanism, the valve body is provided with a water inlet connector and a water outlet connector, the plugging mechanism comprises a first valve clack, a second valve clack and a cover plate, the first valve clack is connected in the valve body in a sliding manner, and the second valve clack is connected in the valve body in a sliding manner. A sliding groove, a water inlet hole and a water outlet hole are formed in the first valve clack, the second valve clack is slidably connected into the first valve clack through the sliding groove, a first through hole is formed in the cover plate, the cover plate is arranged at the end, away from the water outlet hole, of the first valve clack, and the driving mechanism is arranged on the valve body. And the driving end of the driving mechanism penetrates through the first through hole and is in transmission connection with the second valve clack. The stop valve is provided with the two valve clacks, when the stop valve is used for transmitting high-pressure fluid, the second valve clack is opened for pressure relief, and therefore the pressure difference between the two ends of the first valve clack is reduced, and the opening difficulty of the stop valve is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of stop valves, and in particular to a high-pressure self-sealing bellows stop valve. Background Art

[0002] The stop valve, also known as the gate valve, is a forced sealing valve. Its sealing is achieved by applying torque to the valve stem. The valve stem applies pressure to the valve disc in the axial direction, so that the valve disc sealing surface fits tightly with the valve seat sealing surface, preventing the medium from leaking along the gap between the sealing surfaces.

[0003] At present, the Chinese utility model patent application with the announcement date of August 16, 2022 and the announcement number of CN217207752U provides a bellows stop valve, including a valve body, which includes a medium channel, a valve stem and a valve cover, the valve cover is connected to the valve body and forms a valve cavity, and the valve stem and the valve cavity are sealed and connected by a seal; a protective member, a protective cavity is formed between the protective member and the seal, at least one flow passage is opened on the protective member, and the flow passage is connected with the protective cavity, the medium channel and the valve cavity; a bellows and a valve disc, the bellows is located in the protective cavity, and the valve disc is located at one end of the valve stem close to the medium channel; the valve stem reciprocates along the axial direction of the valve cavity so that the valve disc and the valve seat have abutment and separation states. When the medium is passed into the medium channel, the protective cavity can protect the bellows. When the medium rushes into the buffer cavity along the flow passage, the flow passage slows down the speed of the medium. Therefore, when it rushes into the protective cavity again, its speed is very slow, almost in a stable and static state, and will not erode the bellows.

[0004] In a bellows stop valve in the related art, when a high-pressure fluid flows inside the stop valve, a large pressure difference will exist at both ends of the valve disc, which will cause the valve disc to encounter greater resistance when opening, making it difficult to open. Utility Model Content

[0005] The embodiment of the present application provides a high-pressure self-sealing bellows stop valve, which can improve the technical problem in the related art that the stop valve is difficult to open when a high-pressure fluid flows inside the stop valve.

[0006] An embodiment of the present application provides a high-pressure self-sealing bellows stop valve, including a valve body, a sealing mechanism, and a driving mechanism. The valve body is provided with a water inlet connection port and a water outlet connection port. The sealing mechanism includes a first valve flap, a second valve flap, and a cover plate. The first valve flap is slidably connected to the valve body. The first valve flap is provided with a sliding groove, a water inlet hole, and a water outlet hole. The second valve flap is slidably connected to the first valve flap through the sliding groove. A first through hole is provided on the cover plate. The cover plate is arranged on an end of the first valve flap away from the water outlet hole. The driving mechanism is arranged on the valve body, and the driving end of the driving mechanism is transmission-connected to the second valve flap through the first through hole.

[0007] The above-mentioned technical scheme in the embodiment of the present application has at least the following technical effects: when high-pressure fluid flows inside the stop valve, high-pressure fluid still exists on the side of the water inlet connection port after the first valve flap is closed, while the fluid pressure on the side of the water outlet connection port is lower, so that there will be a large pressure difference on both sides of the first valve flap, which will make it more difficult to manually open the first valve flap. At this time, the second valve flap is first opened by the driving mechanism, and the water inlet hole and the water outlet hole are opened. The high-pressure fluid on the side of the water inlet connection port enters the sliding groove through the water inlet hole, and then enters the side of the water outlet connection port through the water outlet hole, thereby increasing the fluid pressure on the side of the water outlet connection port and reducing the pressure difference at both ends of the first valve flap. Then, the second valve flap and the first valve flap are driven more effortlessly by the driving mechanism, and the check valve is opened.

[0008] The high-pressure self-sealing bellows stop valve provided in the embodiment of the present application is provided with double valve flaps. When the stop valve is used to transmit high-pressure fluid, the pressure is first released by opening the second valve flap, thereby reducing the pressure difference at both ends of the first valve flap and reducing the difficulty of opening the stop valve.

[0009] In some embodiments, the blocking mechanism further includes a sealing ring, which is disposed on an end of the second valve flap away from the cover plate.

[0010] In some embodiments, the driving mechanism includes a valve stem, a support cylinder, a fixing assembly and a transmission assembly. The support cylinder is arranged on the valve body. The valve stem includes a threaded portion, a fixing portion and a connecting portion. A connecting groove is provided on the second valve flap. One end of the connecting portion is connected to the second valve flap through the connecting groove. The fixing assembly is arranged on the support cylinder to limit the rotation of the valve stem. The transmission assembly is arranged on the fixing assembly and is transmission-connected to the threaded portion to drive the valve stem to rise and fall.

[0011] In some embodiments, the fixing assembly includes a valve cover and a limit strip, the valve cover is arranged on the support tube, a second through hole is opened on the valve cover, the limit strip is arranged on the valve cover, and the limit strip is located in the second through hole, a limit groove is opened on the fixing part of the valve stem, and the limit strip is clamped with the fixing part through the limit groove.

[0012] In some embodiments, the transmission assembly includes a rotating disk, a rotating sleeve, and a bracket, wherein the bracket is disposed on the valve cover, the rotating sleeve is rotatably connected to the bracket, the rotating disk is disposed on the rotating sleeve, an internal thread is provided on the rotating sleeve, an external thread is provided on the threaded portion of the valve stem, and the threaded portion is threadedly connected to the rotating sleeve.

[0013] In some embodiments, a bellows, a first sealing ring and a second sealing ring are sleeved on the valve stem, and the bellows, the first sealing ring and the second sealing ring are all located inside the support tube, the bottom of the bellows is fixedly connected to the first sealing ring, the first sealing ring is slidably connected inside the support tube, the end of the bellows away from the first sealing ring is fixedly connected to the second sealing ring, the end of the second sealing ring close to the bellows abuts against the support tube, and the end of the second sealing ring away from the bellows abuts against the valve cover.

[0014] In some embodiments, a plurality of limit plates are disposed inside the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A schematic diagram of the overall structure of a high-pressure self-sealing bellows stop valve provided in an embodiment of the present application;

[0017] Figure 2 A cross-sectional view of a high-pressure self-sealing bellows stop valve provided in an embodiment of the present application;

[0018] Figure 3 for Figure 2 A magnified view of part A;

[0019] Figure 4 for Figure 2 A magnified view of part B;

[0020] Figure 5 for Figure 2 A magnified view of part C;

[0021] Figure 6 for Figure 2 A magnified view of part D;

[0022] Figure 7 A schematic diagram of the exploded structure of a fixing assembly and a fixing part of a high-pressure self-sealing bellows stop valve provided in an embodiment of the present application.

[0023] Among them, the reference numerals in the figure are:

[0024] 1. Valve body; 11. Water inlet connection port; 12. Water outlet connection port; 21. First valve flap; 211. Sliding groove; 212. Water inlet hole; 213. Water outlet hole; 22. Second valve flap; 221. Connecting groove; 23. Cover plate; 231. First through hole; 24. Sealing ring; 31. Valve stem; 311. Threaded portion; 312. Fixed portion; 3121. Limiting groove; 313. Connecting portion; 32. Support cylinder; 331. Valve cover; 3311. Second through hole; 332. Limiting strip; 341. Rotating disk; 342. Rotating sleeve; 343. Bracket; 4. Bellows; 41. First sealing ring; 42. Second sealing ring; 5. Limiting plate. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0031] It should be noted that, in the present application, words such as "in some embodiments", "exemplarily", "for example", etc. are used to indicate examples, illustrations or descriptions. Any embodiment or design described in the present application as "in some embodiments", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in some embodiments", "exemplarily", "for example", etc. is intended to present related concepts in a concrete way, meaning that specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] The stop valve, also known as the gate valve, is a forced sealing valve. Its sealing is achieved by applying torque to the valve stem. The valve stem applies pressure to the valve disc in the axial direction, so that the valve disc sealing surface fits tightly with the valve seat sealing surface, preventing the medium from leaking along the gap between the sealing surfaces.

[0033] In a bellows stop valve in the related art, when a high-pressure fluid flows inside the stop valve, there will be a large pressure difference between the two ends of the valve disc, which will cause the valve disc to encounter greater resistance when opening, making it difficult to open. Based on this, in order to improve the problems in the related art, the embodiment of the present application provides the following solution.

[0034] Please also read Figures 1 to 6 The embodiment of the present application provides a high-pressure self-sealing bellows stop valve, including a valve body 1, a blocking mechanism, and a driving mechanism. The valve body 1 is provided with a water inlet connection port 11 and a water outlet connection port 12. The blocking mechanism includes a first valve flap 21, a second valve flap 22 and a cover plate 23. The first valve flap 21 is slidably connected to the valve body 1. The first valve flap 21 is provided with a sliding groove 211, a water inlet hole 212 and a water outlet hole 213. The second valve flap 22 is slidably connected to the first valve flap 21 through the sliding groove 211. The cover plate 23 is provided with a first through hole 231. The cover plate 23 is arranged on one end of the first valve flap 21 away from the water outlet hole 213. The driving mechanism is arranged on the valve body 1, and the driving end of the driving mechanism passes through the first through hole 231 and is transmission-connected to the second valve flap 22.

[0035] From the above, it can be seen that in the embodiment of the present application, a high-pressure self-sealing bellows stop valve is provided. When a high-pressure fluid flows inside the stop valve, after the first valve flap 21 is closed, there is still high-pressure fluid on the side of the water inlet connection port 11, while the fluid pressure on the side of the water outlet connection port 12 is lower, so that there will be a large pressure difference on both sides of the first valve flap 21, and it will be difficult to manually open the first valve flap 21. At this time, the second valve flap 22 is first opened by the driving mechanism, and the water inlet hole 212 and the water outlet hole 213 are opened. The high-pressure fluid on the side of the water inlet connection port 11 enters the sliding groove 211 through the water inlet hole 212, and then enters the side of the water outlet connection port 12 through the water outlet hole 213, thereby increasing the fluid pressure on the side of the water outlet connection port 12, reducing the pressure difference at both ends of the first valve flap 21, and then the second valve flap 22 and the first valve flap 21 are driven more effortlessly by the driving mechanism, and the check valve is opened.

[0036] In some embodiments, please refer to Figures 1 to 3 The blocking mechanism further includes a sealing ring 24 , which is disposed on an end of the second valve flap 22 away from the cover plate 23 .

[0037] In this way, the sealing ring 24 can enhance the sealing effect of the second valve flap 22 on the water outlet 213, thereby preventing fluid leakage from occurring between the sliding groove 211 and the water outlet connection port 12 when the second valve flap 22 is closed.

[0038] Optionally, in some embodiments, see Figures 1 to 6 The driving mechanism includes a valve stem 31, a support cylinder 32, a fixing assembly and a transmission assembly. The support cylinder 32 is arranged on the valve body 1. The valve stem 31 includes a threaded portion 311, a fixing portion 312 and a connecting portion 313. A connecting groove 221 is provided on the second valve disc 22. One end of the connecting portion 313 is connected to the second valve disc 22 through the connecting groove 221. The fixing assembly is arranged on the support cylinder 32 to limit the rotation of the valve stem 31. The transmission assembly is arranged on the fixing assembly and is transmission-connected to the threaded portion 311 to drive the valve stem 31 to rise and fall.

[0039] With such arrangement, the valve stem 31 is used to drive the first valve flap 21 and the second valve flap 22 to move up and down, and the support tube 32 can support the valve stem 31 to prevent the valve stem 31 from deviating from the original position, making it difficult to open and close the check valve; the fixing component can cooperate with the fixing portion 312 of the valve stem 31 to limit the rotation of the valve stem 31, and the transmission component is used to drive the valve stem 31 to move up and down, thereby driving the check valve to open and close.

[0040] Optionally, see Figures 2 to 7The fixing assembly includes a valve cover 331 and a limiting strip 332. The valve cover 331 is arranged on the support tube 32. A second through hole 3311 is opened on the valve cover 331. The limiting strip 332 is arranged on the valve cover 331, and the limiting strip 332 is located in the second through hole 3311. A limiting groove 3121 is opened on the fixing portion 312 of the valve stem 31, and the limiting strip 332 is clamped with the fixing portion 312 through the limiting groove 3121.

[0041] In this way, the valve cover 331 seals the top of the support tube 32 to prevent fluid from leaking from the top of the support tube 32. The limit strip 332 is engaged with the limit groove 3121, thereby allowing the valve stem 31 to move up and down, while limiting the rotation of the valve stem 31 to avoid wear of the contact area between the second valve flap 22 and the connecting part 313 due to the rotation of the connecting part 313, thereby increasing the service life of the check valve.

[0042] In some embodiments, see Figures 1 to 6 The transmission assembly includes a rotating disk 341, a rotating sleeve 342, and a bracket 343. The bracket 343 is arranged on the valve cover 331. The rotating sleeve 342 is rotatably connected to the bracket 343. The rotating disk 341 is arranged on the rotating sleeve 342. The rotating sleeve 342 is provided with an internal thread. The threaded portion 311 of the valve stem 31 is provided with an external thread. The threaded portion 311 is threadedly connected to the rotating sleeve 342.

[0043] In this arrangement, the bracket 343 is rotatably connected to the rotating sleeve 342 via a radial bearing. When the staff rotates the rotating disk 341, the rotating sleeve 342 is driven to rotate by the rotating disk 341 and is prevented from moving up and down due to the restriction of the radial bearing. Therefore, the rotating sleeve 342 drives the threaded portion 311 to move up and down through the thread and only provides a small part of the rotational force to the threaded portion 311. The fixing component can offset this part of the rotational force to achieve the effect of preventing the valve stem 31 from rotating.

[0044] Optionally, in some embodiments, see Figures 1 to 5 A bellows 4, a first sealing ring 41 and a second sealing ring 42 are sleeved on the fixed portion 312, the bellows 4, the first sealing ring 41 and the second sealing ring 42 are all located inside the support tube 32, the bottom of the bellows 4 is fixedly connected to the first sealing ring 41, the first sealing ring 41 is welded to the fixed portion 312, the first sealing ring 41 is slidably connected inside the support tube 32, one end of the bellows 4 away from the first sealing ring 41 is fixedly connected to the second sealing ring 42, one end of the second sealing ring 42 close to the bellows 4 abuts against the support tube 32, and one end of the second sealing ring 42 away from the bellows 4 abuts against the valve cover 331.

[0045] With such arrangement, the first sealing ring 41 is welded to the fixed part 312 to seal the fixed part 312. The first sealing ring 41 can also prevent the fluid inside the check valve from flowing into the support tube 32 to flush the bellows 4, thereby protecting the bellows 4. When the first sealing ring 41 has poor sealing performance, some fluid will enter the support tube 32. The second sealing ring 42 can prevent the fluid entering the support tube 32 from leaking out of the check valve, thereby increasing the overall sealing performance of the check valve.

[0046] Optionally, see Figure 1 and Figure 2 A plurality of limit plates 5 are arranged inside the valve body 1 .

[0047] With such arrangement, the limiting plate 5 can limit the first valve flap 21 in the horizontal direction, thereby preventing the first valve flap 21 from deviating from the original position during the opening and closing process, thereby preventing the first valve flap 21 from effectively sealing.

[0048] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A high-pressure self-sealing bellows stop valve, characterized in that: The invention comprises a valve body (1), a blocking mechanism and a driving mechanism. The valve body (1) is provided with a water inlet connection port (11) and a water outlet connection port (12). The blocking mechanism comprises a first valve flap (21), a second valve flap (22) and a cover plate (23). The first valve flap (21) is slidably connected to the valve body (1). The first valve flap (21) is provided with a sliding groove (211), a water inlet hole (212) and a water outlet hole (213). The second valve flap (22) is slidably connected to the first valve flap (21) through the sliding groove (211). The cover plate (23) is provided with a first through hole (231). The cover plate (23) is arranged on an end of the first valve flap (21) away from the water outlet hole (213). The driving mechanism is arranged on the valve body (1), and the driving end of the driving mechanism passes through the first through hole (231) to be transmission-connected to the second valve flap (22).

2. A high pressure self-sealing bellows stop valve according to claim 1, characterized in that: The blocking mechanism further comprises a sealing ring (24), wherein the sealing ring (24) is arranged on an end of the second valve flap (22) away from the cover plate (23).

3. A high pressure self-sealing bellows stop valve according to any one of claims 1 to 2, characterized in that: The driving mechanism comprises a valve stem (31), a support cylinder (32), a fixing assembly and a transmission assembly. The support cylinder (32) is arranged on the valve body (1). The valve stem (31) comprises a threaded portion (311), a fixing portion (312) and a connecting portion (313). A connecting groove (221) is provided on the second valve flap (22). One end of the connecting portion (313) is connected to the second valve flap (22) via the connecting groove (221). The fixing assembly is arranged on the support cylinder (32) and is used to limit the rotation of the valve stem (31). The transmission assembly is arranged on the fixing assembly and is in transmission connection with the threaded portion (311) and is used to drive the valve stem (31) to rise and fall.

4. A high pressure self-sealing bellows (4) stop valve according to claim 3, characterized in that: The fixing assembly comprises a valve cover (331) and a limiting strip (332); the valve cover (331) is arranged on the support tube (32); a second through hole (3311) is provided on the valve cover (331); the limiting strip (332) is arranged on the valve cover (331), and the limiting strip (332) is located in the second through hole (3311); a limiting groove (3121) is provided on the fixing portion (312) of the valve stem (31); and the limiting strip (332) is clamped with the fixing portion (312) through the limiting groove (3121).

5. A high pressure self-sealing bellows stop valve according to claim 4, characterized in that: The transmission assembly comprises a rotating disk (341), a rotating sleeve (342), and a bracket (343); the bracket (343) is arranged on the valve cover (331); the rotating sleeve (342) is rotatably connected to the bracket (343); the rotating disk (341) is arranged on the rotating sleeve (342); the rotating sleeve (342) is provided with an internal thread; the threaded portion (311) of the valve stem (31) is provided with an external thread; the threaded portion (311) is threadedly connected to the rotating sleeve (342).

6. A high pressure self-sealing bellows stop valve according to claim 5, characterized in that: The valve stem (31) is sleeved with a bellows (4), a first sealing ring (41) and a second sealing ring (42); the bellows (4), the first sealing ring (41) and the second sealing ring (42) are all located inside the support tube (32); the bottom of the bellows (4) is fixedly connected to the first sealing ring (41); the first sealing ring (41) is slidably connected inside the support tube (32); the end of the bellows (4) away from the first sealing ring (41) is fixedly connected to the second sealing ring (42); the end of the second sealing ring (42) close to the bellows (4) abuts against the support tube (32); and the end of the second sealing ring (42) away from the bellows (4) abuts against the valve cover (331).

7. A high pressure self-sealing bellows stop valve according to claim 6, characterized in that: A plurality of limit plates (5) are arranged inside the valve body (1).

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