CN218935473U

CN218935473U - Bellows seal high-pressure regulating valve

Info

Publication number: CN218935473U
Application number: CN202320080881.7U
Authority: CN
Inventors: 许智伟; 吴建曼; 陈志滔; 朱凤兴; 朱立; 曹志海
Original assignee: Jinfeng Fluid Control Technology Co ltd
Current assignee: Jinfeng Fluid Control Technology Co ltd
Priority date: 2023-01-13
Filing date: 2023-01-13
Publication date: 2023-04-28
Anticipated expiration: 2033-01-13

Abstract

The utility model provides a bellows seals high pressure governing valve which characterized in that: the corrugated pipe assembly comprises a plurality of layers of corrugated pipes which are sleeved with each other; the middle cavity is internally provided with a sleeve, the sleeve is fixedly pressed on the valve seat by the middle valve cover, a plurality of diversion holes are formed on the surface of the sleeve, the lower end of the valve rod stretches into the sleeve and is in sealing sliding fit with the inner wall of the sleeve, and a sealing surface which can be in sealing fit with the valve seat is also formed at the lower end of the valve rod. The corrugated pipe assembly can adapt to high-pressure working conditions, so that high-pressure sealing is guaranteed, the service life is prolonged, and the corrugated pipe assembly is more convenient to assemble, disassemble and operate and convenient to maintain and replace.

Description

Bellows seal high-pressure regulating valve

Technical Field

The utility model relates to a regulating valve, in particular to a bellows sealing high-pressure regulating valve.

Background

The regulating valve is an important component in an industrial automation control system and is mainly used for regulating the flow, pressure and other technological parameters of a medium. According to the control signal of the automatic system, the opening of the valve is automatically regulated, and the solid line precisely controls the flow and pressure of the medium in the pipeline.

Under certain special working conditions, some mediums are absolutely not allowed to leak, such as extremely toxic mediums, inflammable mediums, highly corrosive mediums and the like, so that the corrugated pipe can be added to further improve the sealing performance and prevent the mediums from leaking. However, the conventional corrugated pipe is easy to damage under the high-pressure working condition, has short service life, and is very inconvenient to repair and replace once the corrugated pipe is damaged.

For example, the high-temperature and high-pressure bellows adjusting valve (CN 202867871U) of Chinese patent is made of special alloy materials, so that the bellows can meet the working condition of high temperature and high pressure, but the materials are usually expensive, and the cost is high. In addition, once the corrugated pipe is damaged and needs to be disassembled, maintained and replaced, a plurality of parts such as the lower valve cover, the valve core and the upper valve cover need to be disassembled in sequence, and the disassembly and assembly operations are troublesome.

Disclosure of Invention

In order to overcome the defects of the background technology, the utility model provides a bellows sealing high-pressure regulating valve.

The utility model adopts the technical scheme that: a bellows seal high-pressure regulating valve comprises a valve body, a valve seat, a valve rod, a middle valve cover, an upper valve cover and a bellows assembly; the valve body comprises an inlet channel, an outlet channel and a middle cavity, and the outlet channel is communicated with the bottom of the middle cavity; the valve seat is arranged at the joint of the bottom of the middle cavity and the outlet channel, the middle valve cover is arranged at the upper end of the valve body, the upper valve cover is arranged at the upper end of the middle valve cover, the valve rod sequentially passes through the upper valve cover and the middle valve cover and then stretches into the middle cavity of the valve body, the corrugated pipe assembly is arranged in the middle valve cover, the upper end of the corrugated pipe assembly is fixedly connected with the upper valve cover, and the lower end of the corrugated pipe assembly is fixedly connected with the valve rod; the corrugated pipe assembly comprises a plurality of layers of corrugated pipes which are sleeved with each other; the valve rod is characterized in that a sleeve is arranged in the middle cavity, the sleeve is fixedly pressed on the valve seat by the middle valve cover, a plurality of diversion holes are formed in the surface of the sleeve, the lower end of the valve rod stretches into the sleeve and is in sealing sliding fit with the inner wall of the sleeve, and a sealing surface capable of being in sealing fit with the valve seat is further formed at the lower end of the valve rod.

The sleeve is characterized in that a throttling sleeve is further arranged outside the sleeve, a plurality of throttling holes are formed in the surface of the throttling sleeve, and a gap exists between the inner wall of the throttling sleeve and the outer wall of the sleeve.

The upper end of the valve seat is provided with a first annular positioning boss, the lower end of the sleeve is correspondingly provided with a first positioning groove, and the sleeve is sleeved on the first annular positioning boss through the first positioning groove and is matched with the center of the valve seat in a positioning manner.

The sleeve upper end is formed with the second annular location boss, well valve gap lower extreme corresponds and is formed with the second positioning groove, well valve gap is established on the second annular location boss through the second positioning groove cover, with sleeve center location cooperation.

The sleeve outer ring is provided with an annular boss, and the sleeve fixedly compresses the throttling sleeve on the valve seat through the annular boss.

The corrugated pipe assembly comprises 3 layers of corrugated pipes which are sleeved with each other.

The beneficial effects of the utility model are as follows: the corrugated pipe assembly comprises a plurality of layers of corrugated pipes which are sleeved with each other, and can adapt to high-pressure working conditions, so that high-pressure sealing is ensured, and the service life is prolonged; in addition, the sleeve is arranged to block the medium, so that direct impact of the high-pressure medium on the valve rod is reduced, the valve rod is prevented from rotating and shifting to damage the corrugated pipe, sealing between the sealing surface and the valve seat is realized at the bottom of the valve rod, and flow regulation is realized by utilizing sealing sliding fit between the valve rod and the sleeve.

Drawings

Fig. 1 is a schematic structural diagram of a bellows seal high-pressure regulating valve according to an embodiment of the present utility model.

FIG. 2 is a schematic diagram of an exploded view of a valve stem, bellows assembly, sleeve, and throttling sleeve in accordance with an embodiment of the present utility model.

FIG. 3 is a schematic view, partially in section, of a valve stem, bellows assembly, sleeve, and throttling sleeve in accordance with an embodiment of the present utility model.

Detailed Description

Embodiments of the utility model are further described below with reference to the accompanying drawings:

as shown in the figure, the bellows sealing high-pressure regulating valve comprises a valve body 1, a valve seat 2, a valve rod 3, a middle valve cover 4, an upper valve cover 5, a bellows assembly 6, a sleeve 7 and a throttling sleeve 8.

The valve body 1 comprises an inlet channel 11, an outlet channel 12 and a middle cavity 13, wherein the outlet channel 12 is communicated with the bottom of the middle cavity 13, the valve seat 2 is arranged at the joint of the bottom of the middle cavity 13 and the outlet channel 12, the middle valve cover 4 is arranged at the upper end of the valve body 1, the upper valve cover 5 is arranged at the upper end of the middle valve cover 4, and the valve rod 3 sequentially penetrates through the upper valve cover 5 and the middle valve cover 4 and then stretches into the middle cavity 13 of the valve body 1. Wherein, be equipped with the packing subassembly between valve rod 3 and the upper valve gap 5 to guarantee the reliable seal between valve rod 3 and the upper valve gap 5.

The bellows subassembly 6 sets up in well valve gap 4, bellows subassembly 6 contains the bellows 61 that 3 layers cup jointed each other, the welding of bellows 61 upper end has bellows go-between 62, and bellows go-between 62 compresses tightly fixedly and keeps sealedly with well valve gap 4 through last valve gap 5, bellows 61 lower extreme then with valve rod middle part welded fastening, has further increased the sealing of valve rod 3 departments through bellows subassembly 6, avoids appearing the problem that the medium leaked, simultaneously through 3 layers of bellows structures, can adapt to the high pressure operating mode to guarantee high pressure seal, improve life. Of course, the number of layers of the bellows is not limited to 3 layers, but may be 2 layers, 4 layers or more.

The sleeve 7 is arranged in the middle cavity 13 and is fixedly pressed on the valve seat 2 by the middle valve cover 4. The upper end of the valve seat 2 is provided with a first annular positioning boss 21, the lower end of the sleeve 7 is correspondingly provided with a first positioning groove 72, and the sleeve 7 is sleeved on the first annular positioning boss 21 through the first positioning groove 72 and is matched with the center of the valve seat 2 in a positioning manner; the upper end of the sleeve 7 is provided with a second annular positioning boss 73, the lower end of the middle valve cover 4 is correspondingly provided with a second positioning groove 41, and the middle valve cover 4 is sleeved on the second annular positioning boss 73 through the second positioning groove 41 and is matched with the center of the sleeve 7 in a positioning manner; meanwhile, the valve seat and the valve body form a central positioning fit, so that the valve body, the valve seat, the sleeve and the middle valve cover can maintain reliable centrality.

The surface of the sleeve 7 is provided with a plurality of diversion holes 71, the lower end of the valve rod 3 extends into the sleeve 7 and is in sealing sliding fit with the inner wall of the sleeve 7, and the lower end of the valve rod 3 is also provided with a sealing surface 31 which can be in sealing fit with the valve seat 2. When the valve is closed, the valve rod 3 forms reliable seal with the valve seat 2 through the sealing surface 31 at the bottom of the valve rod, and when the valve is opened, the conduction of different numbers of diversion holes 71 is realized through the axial sliding motion of the valve rod 3 relative to the sleeve 7, so that the flow regulation is realized. By adopting the scheme, the sleeve is arranged to block the medium, so that direct impact of the high-pressure medium to the valve rod is reduced, the valve rod is prevented from rotating to deviate to cause damage to the corrugated pipe, sealing between the sealing surface and the valve seat is realized at the bottom of the valve rod, and flow regulation is realized by utilizing sealing sliding fit between the valve rod and the sleeve.

In addition, the sleeve 7 is also provided with a throttling sleeve 8, an annular boss 74 is formed on the outer ring of the sleeve 7, the sleeve 7 fixedly compresses the throttling sleeve 8 on the valve seat 2 through the annular boss 74, a plurality of throttling holes 81 are formed on the surface of the throttling sleeve 8, and a gap 82 is formed between the inner wall of the throttling sleeve 8 and the outer wall of the sleeve 7. When the medium circulates, the medium enters from the inlet channel 11, firstly enters into the gap 82 through the throttle hole 81 of the throttle sleeve 8, then circulates through the diversion hole 71 of the sleeve 7, finally flows out from the outlet channel 12, and can further reduce the scouring of the medium to the valve rod 3 and the sealing surface 31 thereof by arranging the throttle sleeve 8, so that the structure is more stable and reliable, the service life is prolonged, and the use requirement of the high-pressure working condition is met.

In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

The skilled person will know: while the utility model has been described in terms of the foregoing embodiments, the inventive concepts are not limited to the utility model, and any modifications that use the inventive concepts are intended to be within the scope of the appended claims.

Claims

1. A bellows seal high-pressure regulating valve comprises a valve body (1), a valve seat (2), a valve rod (3), a middle valve cover (4), an upper valve cover (5) and a bellows assembly (6); the valve body (1) comprises an inlet channel (11), an outlet channel (12) and a middle cavity (13), wherein the outlet channel (12) is communicated with the bottom of the middle cavity (13); the valve seat (2) is arranged at the joint of the bottom of the middle cavity (13) and the outlet channel (12), the middle valve cover (4) is arranged at the upper end of the valve body (1), the upper valve cover (5) is arranged at the upper end of the middle valve cover (4), the valve rod (3) sequentially penetrates through the upper valve cover (5) and the middle valve cover (4) and then stretches into the middle cavity (13) of the valve body (1), the corrugated pipe assembly (6) is arranged in the middle valve cover (4), the upper end of the corrugated pipe assembly is fixedly connected with the upper valve cover (5), and the lower end of the corrugated pipe assembly is fixedly connected with the valve rod (3);

the method is characterized in that: the corrugated pipe assembly (6) comprises a plurality of layers of corrugated pipes (61) which are sleeved with each other; install sleeve (7) in well chamber (13), well valve gap (4) is fixed to compress tightly sleeve (7) on disk seat (2), just sleeve (7) surface is formed with a plurality of water conservancy diversion holes (71), valve rod (3) lower extreme stretches into sleeve (7) to with the sealed sliding fit of sleeve (7) inner wall, valve rod (3) lower extreme still is formed with can with disk seat (2) sealed fit sealing surface (31).

2. The bellows seal high pressure regulator valve of claim 1, wherein: the sleeve (7) is also provided with a throttling sleeve (8), a plurality of throttling holes (81) are formed in the surface of the throttling sleeve (8), and a gap (82) is formed between the inner wall of the throttling sleeve (8) and the outer wall of the sleeve (7).

3. The bellows seal high pressure regulator valve of claim 1, wherein: the upper end of the valve seat (2) is provided with a first annular positioning boss (21), the lower end of the sleeve (7) is correspondingly provided with a first positioning groove (72), and the sleeve (7) is sleeved on the first annular positioning boss (21) through the first positioning groove (72) and is matched with the center of the valve seat (2) in a positioning mode.

4. A bellows seal high pressure regulator valve according to claim 3, wherein: the upper end of the sleeve (7) is provided with a second annular positioning boss (73), the lower end of the middle valve cover (4) is correspondingly provided with a second positioning groove (41), and the middle valve cover (4) is sleeved on the second annular positioning boss (73) through the second positioning groove (41) and is matched with the center of the sleeve (7) in a positioning mode.

5. The bellows seal high pressure regulator valve of claim 2, wherein: an annular boss (74) is formed on the outer ring of the sleeve (7), and the sleeve (7) fixedly presses the throttling sleeve (8) on the valve seat (2) through the annular boss (74).

6. The bellows seal high pressure regulator valve of claim 1, wherein: the bellows assembly (6) comprises 3 layers of bellows (61) which are mutually sleeved.