Ultra-low-temperature hard sealing butterfly valve convenient to maintain

Abstract

The utility model relates to the technical field of butterfly valves, and discloses an ultra-low temperature hard sealing butterfly valve convenient to maintain, which comprises an ultra-low temperature hard sealing butterfly valve and two pipelines, the ultra-low temperature hard sealing butterfly valve comprises a valve seat, flanges are arranged at two ends of the valve seat, and mounting mechanisms are arranged on the two flanges. The two flanges are respectively connected with the two pipelines through the two mounting mechanisms; the mounting mechanism comprises a buckle assembly and a sealing assembly, the buckle assembly is used for fixing the flange and the pipeline, and the sealing assembly is used for sealing a gap between the flange and the pipeline; according to the ultralow-temperature hard sealing butterfly valve convenient to maintain, the butterfly valve and a pipeline are connected through a buckle structure, the butterfly valve is convenient to disassemble for cleaning and maintenance, and sealing can be automatically achieved through an air bag structure in the installation process.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to an ultra-low temperature hard-sealed butterfly valve which is easy to maintain. Background Art

[0002] Ultra-low temperature hard-sealed butterfly valve is a type of butterfly valve used in ultra-low temperature environments. The butterfly valve, also called the flap valve, is a simple-structured regulating valve that can be used for switching control of low-pressure pipeline media. The butterfly valve refers to a valve whose closing member (valve disc or valve plate) is a disc that rotates around the valve axis to achieve opening and closing.

[0003] During the long-term use of the ultra-low temperature hard-sealed butterfly valve, a large amount of dirt is easily attached to the inner surface wall and valve plate of the butterfly valve, so the butterfly valve needs to be maintained and cleaned by the staff. However, when maintaining and cleaning the existing butterfly valve, the fixing bolts around the butterfly valve need to be removed, which is very inconvenient.

[0004] Therefore, in order to solve the above technical problems existing in the prior art, an ultra-low temperature hard-sealed butterfly valve which is easy to maintain is proposed. Utility Model Content

[0005] The utility model provides an ultra-low temperature hard-sealed butterfly valve which is easy to maintain. The butterfly valve is connected to the pipeline by a snap-fit ​​structure, which is easy to disassemble for cleaning and maintenance, and can automatically achieve the beneficial effect of sealing through the airbag structure during installation. It solves the problem that the existing ultra-low temperature hard-sealed butterfly valve mentioned in the above background technology is prone to a large amount of dirt adhering to the surface wall and valve plate inside the butterfly valve during long-term use, so the butterfly valve needs to be maintained and cleaned by staff, but the existing butterfly valve needs to remove the fixing bolts around the butterfly valve when it is maintained and cleaned, which is very inconvenient.

[0006] The utility model provides the following technical solutions: an ultra-low temperature hard-sealed butterfly valve that is easy to maintain, comprising an ultra-low temperature hard-sealed butterfly valve and two pipelines, the ultra-low temperature hard-sealed butterfly valve comprising a valve seat, both ends of the valve seat are provided with flanges, the two flanges are provided with mounting mechanisms, and the two flanges are respectively connected to the two pipelines through two mounting mechanisms;

[0007] The mounting mechanism comprises a buckle assembly and a sealing assembly, wherein the buckle assembly is used to fix the flange and the pipeline, and the sealing assembly is used to seal the gap between the flange and the pipeline.

[0008] As an optional solution of the ultra-low temperature hard-sealed butterfly valve that is easy to maintain described in the utility model, the ultra-low temperature hard-sealed butterfly valve also includes a valve plate arranged on the valve seat, a valve stem is arranged on the valve plate, and a handle is arranged on the valve stem.

[0009] As an optional solution of the ultra-low temperature hard-sealed butterfly valve easy to maintain described in the utility model, wherein: the buckle assembly includes a first latch provided on the flange, a first slot is provided on the pipeline, and the first latch is movably engaged in the first slot;

[0010] The pipe is provided with a first slide groove, a second latch is slidably arranged in the first slide groove, a second slot is provided on the first latch, and the second latch is movably engaged in the second slot.

[0011] As an optional solution of the ultra-low temperature hard-sealed butterfly valve easy to maintain described in the utility model, wherein: the buckle assembly also includes a spring, and the second latch is elastically connected to the inner wall of the first slide groove through the spring;

[0012] The second latch is provided with a pull rod, and the pull rod is slidably connected to the pipe.

[0013] As an optional solution of the ultra-low temperature hard-sealed butterfly valve that is easy to maintain described in the utility model, wherein: two snap-fit ​​assemblies are provided, and the two snap-fit ​​assemblies are symmetrical based on the central axis of the flange.

[0014] As an optional solution of the ultra-low temperature hard-sealed butterfly valve that is easy to maintain described in the utility model, the sealing assembly includes a sealing airbag arranged on the pipeline, a connecting gap is formed between the flange and the pipeline, and the sealing airbag fits into the connecting gap.

[0015] As an optional solution of the ultra-low temperature hard-sealed butterfly valve that is easy to maintain described in the utility model, the sealing assembly also includes a second slide groove opened in the pipeline, the second slide groove is connected to the first slide groove, a slide rod is slidably arranged in the second slide groove, and the slide rod is connected to the inner wall of the sealing airbag close to the flange side.

[0016] As an optional solution of the ultra-low temperature hard-sealed butterfly valve easy to maintain described in the utility model, wherein: a connecting rod is also slidably arranged in the second slide groove, the connecting rod is connected to the second latch, and a connecting seat is arranged on the connecting rod;

[0017] The sealing assembly also includes a transmission rod, and two ends of the transmission rod are respectively movably hinged to the sliding rod and the connecting seat through hinge shafts.

[0018] The utility model has the following beneficial effects:

[0019] 1. This ultra-low temperature hard-sealed butterfly valve, which is easy to maintain, realizes the rapid installation of the valve body and the pipeline. After the two first latches on the flange are aligned with the two first slots on the pipeline and inserted, the flange can be automatically fixed on the pipeline through the buckle assembly. When disassembling, the flange can be released by pulling the two pull rods at the same time, realizing rapid disassembly, thereby facilitating the cleaning and maintenance of the butterfly valve.

[0020] 2. This ultra-low temperature hard-sealed butterfly valve, which is easy to maintain, has an annular sealing airbag installed at the gap between the flange and the pipeline to improve the sealing performance between the flange and the pipeline.

[0021] 3. This ultra-low temperature hard-sealed butterfly valve, which is easy to maintain, also realizes automatic sealing between the flange and the pipeline. When the flange and the pipeline begin to be spliced, the sealing airbag on the pipeline will be automatically compressed to allow the flange to be inserted without obstacles. When the flange and the pipeline are spliced, the sealing airbag will gradually expand and reset to fill the gap between the flange and the pipeline, thereby improving the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0023] Figure 2 It is a schematic cross-sectional structure diagram of the utility model as a whole.

[0024] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0025] Figure 4 This is a schematic diagram of the first explosion structure of the utility model.

[0026] Figure 5 This is a schematic diagram of the second explosion structure of the utility model.

[0027] In the figure: 100, ultra-low temperature hard-sealed butterfly valve; 110, valve seat; 120, flange; 130, valve plate; 140, valve stem; 150, handle; 200, pipeline; 300, installation mechanism; 310, snap-fit ​​assembly; 311, first latch; 312, first slot; 313, first slide groove; 314, second latch; 315, second slot; 316, spring; 317, pull rod; 320, sealing assembly; 321, sealing airbag; 322, connecting gap; 323, second slide groove; 324, slide rod; 325, connecting rod; 326, connecting seat; 327, transmission rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] For example, see Figure 1-Figure 4 A cryogenic hard-sealed butterfly valve that is easy to maintain includes a cryogenic hard-sealed butterfly valve 100 and two pipes 200. The cryogenic hard-sealed butterfly valve 100 includes a valve seat 110. Both ends of the valve seat 110 are provided with flanges 120. Both flanges 120 are provided with mounting mechanisms 300. The two flanges 120 are respectively connected to the two pipes 200 through two mounting mechanisms 300.

[0030] The mounting mechanism 300 includes a buckle assembly 310 and a sealing assembly 320. The buckle assembly 310 is used to fix the flange 120 and the pipe 200, and the sealing assembly 320 is used to seal the gap between the flange 120 and the pipe 200.

[0031] The ultra-low temperature hard-sealed butterfly valve 100 further includes a valve plate 130 disposed on the valve seat 110 . A valve stem 140 is disposed on the valve plate 130 . A handle 150 is disposed on the valve stem 140 .

[0032] In this embodiment, the ultra-low temperature hard-sealed butterfly valve 100 is a valve structure main body, installed between two pipes 200, and plays a role in controlling the opening and closing of the connecting channel between the two pipes 200. By turning the handle 150 to drive the valve stem 140 and the valve plate 130 to rotate, the opening and closing of the channel in the valve seat 110 can be controlled.

[0033] Flanges 120 are installed at both ends of the valve seat 110 , and the two flanges 120 are respectively installed on the pipeline 200 through two installation mechanisms 300 .

[0034] Embodiment 2: This embodiment is an improvement on Embodiment 1. For details, please refer to Figure 1-Figure 5 The buckle assembly 310 includes a first latch 311 disposed on the flange 120 , a first slot 312 is provided on the pipe 200 , and the first latch 311 is movably engaged in the first slot 312 ;

[0035] A first slide groove 313 is provided on the pipe 200, a second latch 314 is slidably provided in the first slide groove 313, a second slot 315 is provided on the first latch 311, and the second latch 314 is movably engaged in the second slot 315;

[0036] The buckle assembly 310 further includes a spring 316, and the second latch 314 is elastically connected to the inner wall of the first slide groove 313 via the spring 316;

[0037] A pull rod 317 is disposed on the second latch 314, and the pull rod 317 is slidably connected to the pipe 200;

[0038] Two snap-fit ​​assemblies 310 are provided, and the two snap-fit ​​assemblies 310 are symmetrical based on the central axis of the flange 120 .

[0039] In this embodiment, during the specific installation work, the ultra-low temperature hard-sealed butterfly valve 100 can be inserted by aligning the entirety of the ultra-low temperature hard-sealed butterfly valve 100 with the pipeline 200, or the pipeline 200 can be inserted by aligning the ultra-low temperature hard-sealed butterfly valve 100.

[0040] Taking the buckle assembly 310 located on the upper left side as an example, when the flange 120 is moved to the left close to the pipe 200, as shown in FIG. Figure 3 As shown, first, the trapezoidal first latch 311 is inserted into the first slot 312, and its inclined surface matches the inclined surface of the trapezoidal second latch 314, pushing the second latch 314 upward and compressing the spring 316. Until the first latch 311 moves to the left until the second latch 314 matches the second slot 315. The second latch 314 pops up downward under the elastic force of the spring 316 and is inserted into the second slot 315, fixing the first latch 311. Thus, the fixing of the flange 120 and the pipe 200 is completed.

[0041] In addition, when disassembling, the upper pull rod 317 can be pulled upward and the lower pull rod 317 can be pulled downward at the same time to drive the two second pins 314 to be pulled out of the two second slots 315 respectively. At this time, the fixation of the two first pins 311 is released, and the flange 120 can be pulled out to the left.

[0042] Embodiment 3: This embodiment is an improvement made on the basis of Embodiment 2. For details, please refer to Figure 2-Figure 4 The sealing assembly 320 includes a sealing airbag 321 disposed on the pipe 200, a connecting gap 322 is formed between the flange 120 and the pipe 200, and the sealing airbag 321 fits with the connecting gap 322;

[0043] The sealing assembly 320 further includes a second slide groove 323 provided in the pipe 200, the second slide groove 323 is connected to the first slide groove 313, a slide rod 324 is slidably provided in the second slide groove 323, and the slide rod 324 is connected to the inner wall of the sealing airbag 321 near the flange 120;

[0044] A connecting rod 325 is slidably disposed in the second sliding groove 323, the connecting rod 325 is connected to the second latch 314, and a connecting seat 326 is disposed on the connecting rod 325;

[0045] The sealing assembly 320 further includes a transmission rod 327 , and two ends of the transmission rod 327 are respectively movably hinged to the sliding rod 324 and the connecting seat 326 through hinge shafts.

[0046] In this embodiment, after achieving convenient installation, the sealing problem between the flange 120 and the pipeline 200 is also considered. Figure 2 and Figure 3 As shown, after the flange 120 and the pipe 200 are spliced ​​together, an annular connection gap 322 is formed between the two. A sealing airbag 321 is installed on the pipe 200 to fit the connection gap 322, and the sealing airbag 321 is filled with gas, such as compressed nitrogen or air.

[0047] Taking the pipe 200 inserted to the left and connected to the flange 120 on the left as an example, when the two first latches 311 on the flange 120 begin to be inserted into the two first slots 312, the second latch 314 on the upper side moves up, and the second latch 314 on the lower side moves down. The second latch 314 on the upper side drives the connecting rod 325 and the connecting seat 326 to move up. Since the transmission rod 327 has a fixed length, the transmission rod 327 will drive the sliding rod 324 to move left. Similarly, the second latch 314 on the lower side will pull the sliding rod 324 on the lower side to move left.

[0048] The two slide bars 324 are connected to the right inner wall of the sealing airbag 321. When the two slide bars 324 move to the left, the sealing airbag 321 will automatically collapse to the left to allow the flange 120 to be inserted. When the flange 120 is completely spliced ​​with the pipe 200, the two second latches 314 are reset, causing the two slide bars 324 to move to the right and reset. At this time, the sealing airbag 321 will expand to fill the gap between the flange 120 and the pipe 200, thereby playing a sealing role.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An ultra-low temperature hard-sealed butterfly valve that is easy to maintain, comprising an ultra-low temperature hard-sealed butterfly valve (100) and two pipelines (200), characterized in that: The ultra-low temperature hard-sealed butterfly valve (100) comprises a valve seat (110), flanges (120) are provided at both ends of the valve seat (110), mounting mechanisms (300) are provided on the two flanges (120), and the two flanges (120) are respectively connected to the two pipes (200) via the two mounting mechanisms (300); The mounting mechanism (300) comprises a buckle assembly (310) and a sealing assembly (320), wherein the buckle assembly (310) is used to fix the flange (120) and the pipeline (200), and the sealing assembly (320) is used to seal the gap between the flange (120) and the pipeline (200).

2. The ultra-low temperature hard-sealed butterfly valve that is easy to maintain according to claim 1 is characterized in that: The ultra-low temperature hard-sealed butterfly valve (100) further comprises a valve plate (130) arranged on the valve seat (110), a valve stem (140) being arranged on the valve plate (130), and a handle (150) being arranged on the valve stem (140).

3. The ultra-low temperature hard-sealed butterfly valve easy to maintain according to claim 1, characterized in that: The buckle assembly (310) comprises a first latch (311) arranged on the flange (120); a first slot (312) is provided on the pipe (200); and the first latch (311) is movably engaged in the first slot (312); The pipe (200) is provided with a first slide groove (313), a second latch (314) is slidably arranged in the first slide groove (313), a second slot (315) is provided on the first latch (311), and the second latch (314) is movably engaged in the second slot (315).

4. The ultra-low temperature hard-sealed butterfly valve easy to maintain according to claim 3 is characterized in that: The buckle assembly (310) further includes a spring (316), and the second latch (314) is elastically connected to the inner wall of the first slide groove (313) via the spring (316); The second latch (314) is provided with a pull rod (317), and the pull rod (317) is slidably connected to the pipe (200).

5. The ultra-low temperature hard-sealed butterfly valve easy to maintain according to claim 4, characterized in that: Two snap-fit ​​assemblies (310) are provided, and the two snap-fit ​​assemblies (310) are symmetrical based on the central axis of the flange (120).

6. The ultra-low temperature hard-sealed butterfly valve easy to maintain according to claim 3, characterized in that: The sealing assembly (320) comprises a sealing airbag (321) arranged on the pipeline (200), a connecting gap (322) is formed between the flange (120) and the pipeline (200), and the sealing airbag (321) fits in the connecting gap (322).

7. The ultra-low temperature hard-sealed butterfly valve easy to maintain according to claim 6, characterized in that: The sealing assembly (320) also includes a second slide groove (323) opened in the pipeline (200), the second slide groove (323) is connected to the first slide groove (313), a slide rod (324) is slidably arranged in the second slide groove (323), and the slide rod (324) is connected to the inner wall of the sealing airbag (321) on the side close to the flange (120).

8. The ultra-low temperature hard-sealed butterfly valve easy to maintain according to claim 7, characterized in that: A connecting rod (325) is also slidably disposed in the second sliding groove (323), the connecting rod (325) is connected to the second latch (314), and a connecting seat (326) is disposed on the connecting rod (325); The sealing assembly (320) further comprises a transmission rod (327), and two ends of the transmission rod (327) are respectively movably hinged to the sliding rod (324) and the connecting seat (326) through hinge shafts.

Images