阅读说明：本技术 闸刀阀改良结构 (Improved structure of knife valve ) 是由 施丽月 叶礼祯 于 2019-02-12 设计创作，主要内容包括：本发明公开了一种闸刀阀改良结构,包括一圆形环、一密封盒、一动力源以及一闸刀板。其中,圆形环包括一环壁、一圆形开口及一开缝,圆形开口由环壁所围绕形成,开缝开设于环壁并连通于圆形开口；密封盒密封组设于环壁,且密封盒包括一圆形通孔及一内通道,圆形通孔连通于内通道并组设有一止漏环,内通道连通于开缝；动力源组设于密封盒,且动力源包括一作动杆,其穿经止漏环及圆形通孔至内通道内；闸刀板组设于作动杆,且闸刀板受动力源作动该作动杆而被带动穿经开缝并进而封闭圆形开口。(The invention discloses an improved structure of a knife switch valve, which comprises a circular ring, a sealing box, a power source and a knife switch plate. The circular ring comprises a ring wall, a circular opening and a slit, the circular opening is formed by the ring wall in a surrounding mode, and the slit is formed in the ring wall and communicated with the circular opening; the sealing box is arranged on the annular wall in a sealing mode and comprises a circular through hole and an inner channel, the circular through hole is communicated with the inner channel, a leakage stopping ring is arranged in the circular through hole in a group, and the inner channel is communicated with the slit; the power source group is arranged in the sealing box and comprises an actuating rod which penetrates through the leakage-stopping ring and the circular through hole to the inner channel; the knife switch board is arranged on the actuating rod, and the knife switch board is driven by the power source to actuate the actuating rod to be driven to penetrate through the slit and further seal the round opening.)

1. An improved structure of a knife switch valve is characterized by comprising:

the circular ring comprises a ring wall, a circular opening and a slit, wherein the circular opening is formed by the ring wall in a surrounding mode, and the slit is formed in the ring wall and communicated with the circular opening;

the sealing box is arranged on the annular wall in a sealing assembly mode and comprises a circular through hole and an inner channel, the circular through hole is communicated with the inner channel, a leakage stopping ring is arranged in the circular through hole in an assembly mode, and the inner channel is communicated with the slit;

the power source is assembled in the sealing box and comprises an actuating rod which penetrates through the leakage-stopping ring and the circular through hole to the inner channel; and

a knife switch plate assembled on the actuating rod and driven by the power source to move through the slit and close the circular opening.

2. The improved structure of the knife valve as claimed in claim 1, wherein the annular wall is provided with a protruding space protruding outward on both sides, the front portion of the knife plate is arc-shaped and is provided with an extension portion on both sides, and the extension portions on both sides of the front portion of the knife plate are received in the protruding spaces on both sides of the annular wall.

3. The improved structure of knife gate valve as claimed in claim 1, wherein the sealing box is formed with a guide rail on both sides facing the inner channel, and the knife gate is guided by the guide rail on both sides of the sealing box.

4. The improved structure of the knife gate valve as claimed in claim 1, wherein the sealing box is provided with at least one reinforcing rib protruding outwards.

5. The improved structure of the knife valve as claimed in claim 1, wherein the power source is a pneumatic cylinder.

6. The improved structure of the knife gate valve as claimed in claim 1, wherein the power source is a manual rotating rod.

Technical Field

The present invention relates to an improved structure of a knife valve, and more particularly to an improved structure of a knife valve which can achieve the purposes of effective sealing, leakage prevention, light weight and energy saving.

Background

In the material (or gas) conveying pipeline of machine equipment, a knife valve structure is usually designed therein. Referring to fig. 1, a perspective view of a conventional knife valve structure is shown. As shown in fig. 1, the knife valve structure 9 mainly includes a knife plate 91 and a pneumatic cylinder 92, wherein the front portion of the knife plate 91 is semicircular (as indicated by arrow a in fig. 1), and the pneumatic cylinder 92 is connected to the knife plate 91 and drives it to move back and forth to close or open the conveying pipeline. In addition, the knife valve structure 9 is provided with a leakage-proof ring 93 to prevent the leakage of the material (or gas).

In the knife valve structure 9 shown in fig. 1, the knife plate 91 will grind the leakage-stopping ring 93 during the back and forth movement, so that the leakage-stopping ring 93 will wear continuously and lose the leakage-stopping effect, and the material (or gas) in the conveying pipeline will leak out, causing environmental pollution and affecting the safety of the operator.

Furthermore, in the knife gate valve structure 9 shown in fig. 1, since the front portion of the knife gate plate 91 is semicircular, in order to completely close (seal) the conveying pipeline, the structure of the knife gate plate 91 at the position where the conveying pipeline is closed must be designed to be large, so the installation position of the leakage preventing ring 93 will move backwards, and the installation position of the relative pneumatic cylinder 92 will also move backwards, so that the knife gate valve structure 9 has a large volume and a heavy weight, and needs a larger power to drive the knife gate plate 91, and the support frame 94 must be designed to prevent the knife gate plate 91 from falling down to affect the function.

Disclosure of Invention

The invention aims to provide an improved structure of a knife switch valve.

In order to achieve the purpose, the invention adopts the following technical scheme:

an improved structure of a knife switch valve comprises a circular ring, a sealing box, a power source and a knife switch plate. The circular ring comprises a ring wall, a circular opening and a slit, the circular opening is formed by the ring wall in a surrounding mode, and the slit is formed in the ring wall and communicated with the circular opening; the sealing box is arranged on the annular wall in a sealing mode and comprises a circular through hole and an inner channel, the circular through hole is communicated with the inner channel, a leakage stopping ring is arranged in the circular through hole in a group, and the inner channel is communicated with the slit; the power source group is arranged in the sealing box and comprises an actuating rod which penetrates through the leakage-stopping ring and the circular through hole to the inner channel; the knife switch board is arranged on the actuating rod, and the knife switch board is driven by the power source to actuate the actuating rod to be driven to penetrate through the slit and further to seal the round opening. By means of the structural design, the purpose of effectively sealing and stopping leakage can be achieved.

The annular wall is provided with a protruding space at two sides thereof, the front portion of the knife plate is arc-shaped and is provided with an extending portion at two sides thereof, and the extending portions at two sides of the front portion of the knife plate are accommodated in the protruding spaces at two sides of the annular wall. By means of the structural design, the problem that the transported material is blocked between the circular ring and the knife switch plate to cause leakage failure can be avoided.

The sealing box is formed with a guide rail on both sides facing the inner channel, and the knife board is guided by the guide rail on both sides of the sealing box. By means of the structural design, the problem of falling and deviation of the knife switch board in the process of back-and-forth movement is avoided.

The sealing box is provided with at least one reinforcing rib protruding outwards. By this structure design, the sealing box has better strength.

The power source is a pneumatic cylinder.

The power source is a manual rotating rod.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of a conventional knife valve structure.

FIG. 2 is a perspective view of the first preferred embodiment of the present invention.

FIG. 3 is an exploded view of the first preferred embodiment of the present invention.

FIG. 4 is a cross-sectional view of the first preferred embodiment of the present invention.

FIG. 5 is a perspective view of a second preferred embodiment of the present invention.

[ notation ] to show

1 improved structure of knife valve 2 circular ring 21 and circular opening 22

23-slit 24-protruding space 3 sealing box 31 circular through hole

311 leak-stopping ring 32 inner channel 33 guide rail 34 reinforcing rib

The 4-power source 41 acts as the extension part of the rod 5 knife board 51

Switch blade plate 91 of 62 bolt 7 power source 9 switch blade valve structure

92 pneumatic cylinder 93 leak-proof ring 94 support frame

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 2 to 4, fig. 2 is a perspective view of a first preferred embodiment of the present invention, fig. 3 is an exploded view of the first preferred embodiment of the present invention, and fig. 4 is a cross-sectional view of the first preferred embodiment of the present invention.

As shown in fig. 2 to 4, a knife valve improved structure 1 according to a first preferred embodiment of the present invention includes a circular ring 2, a seal box 3, a power source 4 and a knife plate 5. Wherein, the circular ring 2 comprises a ring wall 21, a circular opening 22 and a slit 23, the circular opening 22 is formed by the ring wall 21, the slit 23 is arranged on the ring wall 21 and communicated with the circular opening 22; the sealing box 3 is hermetically assembled on the annular wall 21 (for example, by welding or other joining methods such as bolts, etc.), and the sealing box 3 includes a circular through hole 31 and an inner channel 32, the circular through hole 31 is communicated with the inner channel 32 and is assembled with a leakage-stopping ring 311 (for example, a rubber leakage-stopping ring), the inner channel 32 is communicated with the slit 23; the power source 4 (for example, a bolt 62) is assembled on the sealing box 3, and the power source 4 includes an actuating rod 41, the actuating rod 41 passes through the leakage-stopping ring 311 and the circular through hole 31 to the inner channel 32; the knife switch 5 is assembled on the actuating rod 41, and the knife switch 5 is driven by the power source 4 to actuate the actuating rod 41 to pass through the slit 23 and further close the circular opening 22.

In detail, when the improved knife gate valve structure 1 shown in fig. 2 to 4 is activated, i.e. when the knife gate 5 is to close or open the material (or gas) conveying pipeline (not shown), the power source 4 activates the actuating rod 41 with its power, for example, in this embodiment, the power source 4 is a pneumatic cylinder, and the actuating rod 41 is activated with the power of pneumatic pressure, and the actuating rod 41 will drive the knife gate 5 assembled thereon to move, when moving forward, the knife gate 5 will be driven to pass through the slit 23 and close the circular opening 22, i.e. the conveying pipeline will be closed, otherwise, when moving backward, the knife gate 5 will be driven to pass through the slit 23 and leave the circular opening 22, i.e. the conveying pipeline will be opened.

As described above, the sealing box 3 is sealingly assembled on the circular ring 2, the leakage stopping ring 311 is assembled on the circular through hole 31 of the sealing box 3, the actuating rod 41 of the power source 4 is inserted into the inner passage 32 through the leakage stopping ring 311 and the circular through hole 31, and therefore, in the improved structure 1 of the knife switch valve, the whole structure is completely sealed, so as to effectively achieve the whole sealing performance, avoid the problem of leakage of materials (or gas), and the relative movement between the actuating rod 41 and the leakage-stopping ring 311 will not generate the cutting problem (the cross-sectional shape of the actuating rod 41 and the leakage-stopping ring 311 are both annular) as the conventional one, so the leakage-stopping ring 311 can maintain its sealing performance and prolong its service life, meanwhile, the actuating rod 41 of the power source 4 can easily pass through the leakage-stopping ring 311 to move smoothly, and the opposite power source 4 does not need too much power, i.e. the specification of the power source 4 can be reduced, thereby achieving the purpose of energy saving.

As can be seen from fig. 2 to 4, in the present embodiment, the annular wall 21 of the circular ring 2 is provided with a protruding space 24 at two sides thereof, the front portion of the knife switch plate 5 is arc-shaped (as indicated by arrow B in fig. 3) and is provided with an extending portion 51 at two sides thereof, and the extending portions 51 at two sides of the front portion of the knife switch plate 5 are respectively accommodated in the protruding spaces 24 at two sides of the annular wall 21.

In the above-mentioned structure, the front portion of the knife plate 5 is arc-shaped, which is different from the traditional circular design, that is, in order to match the arc-shaped design of the front portion of the knife plate 5, protruding spaces 24 are designed on both sides of the annular wall 21 to accommodate the extension 51 of the front portion of the knife plate 5 due to the arc-shaped design. Therefore, the problem that the position of the leakage-stopping ring and the pneumatic cylinder must be moved backward to increase the volume as in the conventional method is not generated, and the transported material can have a buffer accommodating space due to the extending portion 51, so that the problem that the material cannot be prevented from being blocked between the circular ring 2 and the knife switch plate 5 is not generated.

As described above, the improved structure 1 of the knife valve can be reduced in overall structure, so that the structure can be relatively reduced in weight (volume), and the specification of the power source 4 (pneumatic cylinder) can be reduced, so as to achieve the purpose of relatively saving energy.

In addition, in the present embodiment, the seal box 3 is formed with a guide rail 33 on both sides facing the inner channel 32, respectively, and the knife plate 5 is guided by the guide rails 33 on both sides of the seal box 3. Thus, the knife board 5 is supported and guided by the guide rail 33 to move smoothly in the process of being driven to move back and forth by the power source 4 operating the actuating rod 41, and the problem of falling and deviation will not occur relatively.

In the present embodiment, the sealing box 3 is provided with at least one reinforcing rib 34 protruding outwards, and as shown in fig. 2 to 4, the sealing box has two annular reinforcing ribs 34 spaced from each other, but the number and the arrangement manner are not limited thereto. Thus, the sealing case 3 can have better strength.

Please refer to fig. 5, which is a perspective view of a second preferred embodiment of the present invention. In this embodiment, the main structure is the same as that of the first preferred embodiment, except that the power source 7 is a manual rotary rod, i.e. operated by manpower, and the design can achieve the various effects described in the first preferred embodiment.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.