CN218818263U

CN218818263U - Sealing assembly and parallel gate valve comprising same

Info

Publication number: CN218818263U
Application number: CN202223064872.3U
Authority: CN
Inventors: 戚茂波; 张晨; 邓嘉宏
Original assignee: Wuxi Yadi Fluid Control Technology Co ltd
Current assignee: Wuxi Yadi Fluid Control Technology Co ltd
Priority date: 2022-11-18
Filing date: 2022-11-18
Publication date: 2023-04-07
Anticipated expiration: 2032-11-18

Abstract

The utility model relates to a sealing component and contain parallel gate valve of this structure, including valve rod, two disk seats and with the flashboard that two symmetries that the valve rod distal end is connected set up, two the disk seat supports respectively the outside edge of flashboard, two still set up the extrusion subassembly between the flashboard, the valve rod drives two the flashboard is followed the axial and is removed to the distal end from the near-end, valve rod and flashboard extrusion the extrusion subassembly, the extrusion subassembly drives two the flashboard is to both sides separation and extrusion the disk seat is in order to realize sealing. The utility model discloses a parallel gate valve through valve rod and flashboard extrusion subassembly, two flashboards of extrusion subassembly drive are closely laminated with the disk seat to both sides separation and extrusion disk seat, the bellying of flashboard outside edge to realize sealedly, can adjust the extrusion force of flashboard through regulating valve rod axial thrust, be applicable to high pressure and low pressure operating mode simultaneously.

Description

Sealing assembly and parallel gate valve comprising same

Technical Field

The utility model relates to a governing valve technical field especially relates to seal assembly and contain parallel gate valve of this structure.

Background

With the rapid development of scientific technology and the rapid development of industrial level, the sealing performance and reliability of the valve are required to be higher, and the sealing failure can not only cause huge economic loss, but also pollute the environment and even cause serious casualty accidents, so the valve sealing device has great significance for the research and the use of the valve sealing technology under special use conditions.

In the production process, because errors generated by processing and assembling and the structure under the working conditions of high temperature and high pressure deform, a gap exists between the wedge blocks of the flashboard and the valve seat, the sealing is not firm, and therefore a sealing structure which is good in looseness prevention and easy to disassemble and inspect is needed.

Chinese patent No. CN104776240A discloses a parallel gate valve with corrugated pipe, which includes a valve body and a valve cover, wherein a valve rod is arranged in the valve body, the corrugated pipe is sleeved outside the valve rod, and a valve core is arranged at the lower part of the valve rod. This technical scheme only realizes sealedly through the fixed position relation of flashboard and disk seat, and the flashboard is relatively poor with the disk seat leakproofness when meetting high pressure operating mode, reveals easily, and the flashboard blocks easily when meetting high temperature operating mode simultaneously and dies.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a sealing assembly and a parallel gate valve including the same to solve one or more problems of the prior art.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

sealing component, including valve rod, two disk seats and with the flashboard that two symmetries that the valve rod distal end is connected set up, two the disk seat supports respectively the outside edge of flashboard, two still set up extrusion component between the flashboard, the valve rod drive is two the flashboard is followed the axial and is removed to the distal end from the near-end, valve rod and flashboard extrusion component, extrusion component drive is two the flashboard separates and extrudees to both sides the disk seat is in order to realize sealing.

Furthermore, the extrusion subassembly includes first wedge, first wedge sets up two between the flashboard, first wedge includes the cutting head and sets up respectively the first wedge portion of cutting head both sides.

Further, the extrusion subassembly still includes the second wedge, the second wedge sets up the distal end of flashboard, the second wedge includes second wedge portion and sets up the fixed part of second wedge portion distal end.

Furthermore, a locking screw is further arranged at the proximal end of the second wedge-shaped block and used for connecting the second wedge-shaped part and the fixing part.

Further, an anti-loosening block is arranged between the locking screw and the second wedge-shaped portion, a first extending portion is arranged on the side face of the anti-loosening block and extends towards the proximal end to wrap the locking screw, and a second extending portion is arranged on the side face of the anti-loosening block and extends towards the distal end to wrap the second wedge-shaped portion.

Further, the outer side edge of the shutter has a projection which contacts the valve seat.

The utility model also discloses a parallel gate valve, including the valve body and with the valve gap that the valve body near-end is connected, first passageway and second passageway are seted up respectively to the valve body both sides, set up in the valve body first cavity respectively with first passageway and second passageway intercommunication, parallel gate valve still includes aforementioned seal assembly, the valve rod passes the valve gap, the movably setting of flashboard is in the first cavity.

Furthermore, a second cavity is formed in the far end of the valve body, and the second wedge-shaped block is arranged in the second cavity.

Furthermore, the valve body is connected with the valve cover through a first fixing piece.

Further, the valve cover near-end still sets up the gland, the valve cover near-end cover is established and is pressed the cover, press the cover near-end and set up the filler, the gland pass through the second mounting with the valve cover is connected and is compressed tightly press the cover.

Compared with the prior art, the utility model discloses a beneficial technological effect as follows:

(one) the utility model discloses a parallel gate valve extrudees through valve rod and flashboard extrusion subassembly, two flashboards of extrusion subassembly drive are to both sides separation and extrusion disk seat, and the bellying and the disk seat of flashboard outside edge closely laminate to realize sealedly, can adjust the extrusion force of flashboard through governing valve rod axial thrust, be applicable to high pressure and low pressure operating mode simultaneously.

Further, the side face of the anti-loosening block is provided with a first extending part extending towards the near end to wrap the locking screw, and the side face of the anti-loosening block is provided with a second extending part extending towards the far end to wrap the second wedge-shaped part to prevent the locking screw from loosening in a rotating mode.

And furthermore, the sealing assembly is in a modular design, so that the sealing assembly is convenient to disassemble and assemble.

Drawings

Fig. 1 shows a schematic structural diagram of a parallel gate valve according to an embodiment of the present invention.

Fig. 2 shows a schematic structural diagram of a first wedge block in a parallel gate valve according to an embodiment of the present invention.

Fig. 3 shows a schematic structural diagram of a second wedge block in the parallel gate valve according to an embodiment of the present invention.

Fig. 4 shows a schematic structural diagram of an anti-loosening block in a parallel gate valve according to an embodiment of the present invention.

In the drawings, the reference numbers:

1. a valve stem; 11. a fixing ring; 12. fixing screws; 2. a gate plate; 21. a first hole; 22. a boss portion; 23. a third cavity; 3. an extrusion assembly; 31. a first wedge block; 311. pushing the head; 312. a first wedge portion; 32. a second wedge block; 321. a second wedge portion; 322. a fixed part; 323. locking the screw; 324. anti-loosening blocks; 3241. a first extension portion; 3242. a second extension portion; 3243. a third aperture; 4. a valve seat; 41. a second hole; 5. a valve body; 51. a first channel; 52. a second channel; 53. a first cavity; 54. a second cavity; 6. a valve cover; 61. a first fixing member; 62. a gasket; 7. a gland; 71. a second fixing member; 72. pressing the sleeve; 73. a filler; 74. and (4) a filler pad.

Detailed Description

To make the objects, features and advantages of the present invention more comprehensible, please refer to the attached drawings. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limitation of the implementation of the present invention, so that the present invention does not have the essential significance in the technology, and any modification of the structure, change of the ratio relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention.

In the description of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like are defined to indicate an orientation or positional relationship based on that shown in the drawings, merely to facilitate the description of the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

To more clearly describe the structure of the above-described sealing assembly and the parallel gate valve including the same, the present invention defines the terms "distal end" and "proximal end", specifically, the "distal end" refers to the end away from the valve stem 1, the "proximal end" refers to the end close to the valve stem 1, and fig. 1 is taken as an example, the upper end of the valve cover 6 in fig. 1 is the proximal end, and the lower end of the valve cover 6 in fig. 1 is the distal end.

Example one

Referring to fig. 1, 2 and 3, the sealing assembly includes a valve rod 1, two valve seats 4 and two symmetrically disposed gate plates 2 connected to a distal end of the valve rod 1, the two valve seats 4 respectively abut against outer edges of the gate plates 2, an extruding assembly 3 is further disposed between the two gate plates 2, the valve rod 1 drives the two gate plates 2 to move from a proximal end to a distal end along an axial direction, the valve rod 1 and the gate plates 2 extrude the extruding assembly 3, and the extruding assembly 3 drives the two gate plates 2 to separate from each other and extrude the valve seats 4 to achieve sealing.

Referring to fig. 1, specifically, the far end of the valve rod 1 is further provided with a fixing ring 11, the side surface of the fixing ring 11 is fixed at the far end of the valve rod 1 through a fixing screw 12, the far end of the fixing ring 11 extends out of the valve rod 1 and is clamped into a groove (not marked in the figure) at the near end of the gate plate 2, the inner diameter of the groove is smaller than the inner diameter of the fixing ring 11, and the outer diameter of the groove is larger than the outer diameter of the fixing ring 11, so that the gate valve can laterally displace relative to the fixing ring 11.

The specific structures of the shutter 2, the valve seat 4 and the extrusion assembly 3 are described below as follows:

referring to fig. 1, specifically, the gate 2 is circular, the outer diameter of the gate 2 is larger than the inner diameters of the first passage 51 and the second passage 52, and the outer edge of the gate 2 has a protrusion 22 contacting the valve seat 4. A first hole 21 is formed between the two gate plates 2, and a third cavity 23 is further formed on the inner side of each gate plate 2.

Referring to fig. 1, specifically, the valve seat 4 is a hollow circular ring, and a second hole 41 is formed in the middle of the valve seat 4 and is respectively communicated with the first passage 51 and the second passage 52.

Referring to fig. 1 and fig. 2, further, the extruding component 3 includes a first wedge block 31, the first wedge block 31 is disposed between the two gate plates 2, the first wedge block 31 includes a pushing head 311 and first wedge portions 312 respectively disposed at two sides of the pushing head 311, the pushing head 311 is tapered, the pushing head 311 is movably disposed in the third cavity 23, a proximal end of the pushing head 311 is connected to the valve rod 1, the first wedge portions 312 are clamped in the third cavity 23, and an inner side of the first wedge portion 312 is matched with a tapered surface of the pushing head 311.

Referring to fig. 1 and 3, further, the pressing assembly 3 further includes a second wedge block 32, the second wedge block 32 is disposed at a distal end of the ram 2, and the second wedge block 32 includes a second wedge portion 321 and a fixing portion 322 disposed at a distal end of the second wedge portion 321. Preferably, in the sealing assembly of the first embodiment, the second wedge-shaped portion 321 is in mortise-tenon connection with the fixing portion 322. Of course, in other embodiments of the present invention, the second wedge 321 and the fixing portion 322 may also adopt other connection manners such as a threaded connection, a snap connection, etc., as long as it can satisfy the connection between the second wedge 321 and the fixing portion 322, and the present invention is not limited thereto. The distal end of the shutter 2 has a bevel (not shown) that mates with the proximal end of the second wedge 321.

Referring to fig. 1 and 3, further, a locking screw 323 is disposed at a proximal end of the second wedge block 32, and the locking screw 323 passes through the second wedge portion 321 and the fixing portion 322 to connect the second wedge portion 321 and the fixing portion 322.

Referring to fig. 3 and 4, further, an anti-loosening block 324 is further disposed between the locking screw 323 and the second wedge-shaped portion 321, the anti-loosening block 324 is provided with a third hole 3243 through which the locking screw 323 passes, a first extension portion 3241 is disposed on a side surface of the anti-loosening block 324 and extends towards a proximal end to wrap the locking screw 323, and a second extension portion 3242 is disposed on a side surface of the anti-loosening block 324 and extends towards a distal end to wrap the second wedge-shaped portion 321 to prevent the locking screw 323 from rotating loose.

Please refer to fig. 1, the utility model also discloses a parallel gate valve, including valve body 5 and with valve gap 6 that valve body 5 near-end is connected, first passageway 51 and second passageway 52 are seted up respectively to 5 both sides of valve body, set up in the valve body 5 first cavity 53 respectively with first passageway 51 and second passageway 52 intercommunication, parallel gate valve still includes aforementioned seal assembly, valve rod 1 passes valve gap 6, flashboard 2 is movably to be set up in the first cavity 53.

Referring to fig. 1, further, a second cavity 54 is formed at a distal end of the valve body 5, and the second wedge block 32 is disposed in the second cavity 54.

With continued reference to fig. 1, further, the valve body 5 is connected to the valve cover 6 through a first fixing member 61. Preferably, the first fixing member 61 includes a bolt (not labeled) and a nut (not labeled) screwed with the bolt.

With reference to fig. 1, further, a pressing cover 7 is further disposed at the proximal end of the valve cover 6, a pressing sleeve 72 is sleeved at the proximal end of the valve cover 6, the pressing sleeve 72 is sleeved outside the valve rod 1, a packing 73 is disposed at the proximal end of the pressing sleeve 72, a packing pad 74 is disposed at the proximal end of the packing 73, and the pressing cover 7 is connected with the valve cover 6 through a second fixing member 71 and presses the pressing sleeve 72. Preferably, the filler 73 is flexible graphene, and is used for improving the sealing performance of the regulating valve.

With continued reference to fig. 1, a gasket 62 is further disposed between the valve body 5 and the bonnet 6.

The following describes the specific working process of the present invention as follows:

the valve rod 1 drives the flashboard 2 moves from the far end to the near end along the axial, the push head 311 of the first wedge-shaped block 31 is extruded to the far end of the valve rod 1, the first wedge-shaped part 312 is extruded to both sides by the push head 311, the second wedge-shaped part 321 is extruded by the two flashboards 2 at the same time, the two flashboards 2 are pushed by the first wedge-shaped part 312 and the second wedge-shaped part 321 to extrude the valve seat 4 towards the side direction respectively, and the bulge 22 on the side surface of the flashboard 2 is extruded and tightly attached to the valve seat 4 to realize sealing.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A seal assembly characterized by: including valve rod, two disk seats and with the flashboard that two symmetries that the valve rod distal end is connected set up, two the disk seat supports respectively the outside edge of flashboard, two still set up extrusion subassembly between the flashboard, the valve rod drive is two the flashboard is followed the axial and is removed to the distal end from the near-end, valve rod and flashboard extrusion subassembly, the extrusion subassembly drive is two the flashboard is to both sides separation and extrusion the disk seat is in order to realize sealing.

2. The seal assembly of claim 1, wherein: the extrusion subassembly includes first wedge, first wedge sets up two between the flashboard, first wedge includes the push head and sets up respectively the first wedge portion of push head both sides.

3. The seal assembly of claim 2, wherein: the extrusion subassembly still includes the second wedge, the second wedge sets up the distal end of flashboard, the second wedge includes second wedge portion and sets up the fixed part of second wedge portion distal end.

4. A seal assembly according to claim 3, wherein: and the near end of the second wedge-shaped block is also provided with a locking screw which is used for connecting the second wedge-shaped part and the fixing part.

5. The seal assembly of claim 4, wherein: an anti-loosening block is further arranged between the locking screw and the second wedge-shaped portion, a first extending portion is arranged on the side face of the anti-loosening block and extends towards the near end to wrap the locking screw, and a second extending portion is arranged on the side face of the anti-loosening block and extends towards the far end to wrap the second wedge-shaped portion.

6. The seal assembly of claim 1, wherein: the outer edge of the gate plate is provided with a convex part which is contacted with the valve seat.

7. Parallel gate valve, its characterized in that: the parallel gate valve comprises a valve body and a valve cover connected with the near end of the valve body, wherein a first channel and a second channel are respectively formed in two sides of the valve body, a first cavity is formed in the valve body and is respectively communicated with the first channel and the second channel, the parallel gate valve further comprises a sealing assembly according to any one of claims 3-5, the valve rod penetrates through the valve cover, and the flashboard is movably arranged in the first cavity.

8. The parallel gate valve of claim 7, wherein: the far end of the valve body is provided with a second cavity, and the second wedge-shaped block is arranged in the second cavity.

9. The parallel gate valve of claim 7, wherein: the valve body is connected with the valve cover through a first fixing piece.

10. The parallel gate valve of claim 7, wherein: the pressure cover is arranged at the near end of the valve cover, the pressure sleeve is sleeved at the near end of the valve cover, the packing is arranged at the near end of the pressure sleeve, and the pressure cover is connected with the valve cover through a second fixing piece and tightly presses the pressure sleeve.