CN211145393U

CN211145393U - Special knife-type gate valve of SOx/NOx control

Info

Publication number: CN211145393U
Application number: CN201921826612.0U
Authority: CN
Inventors: 缪晓东
Original assignee: Suzhou Liyi Environmental Technology Co ltd
Current assignee: Suzhou Liyi Environmental Technology Co ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-07-31
Anticipated expiration: 2029-10-29

Abstract

The utility model discloses a special sword type gate valve of SOx/NOx control, which comprises a housin, the casing top is provided with the valve gap, the top of valve gap is provided with the hand wheel, the central point of hand wheel puts and is provided with the valve rod, just the valve rod runs through the valve gap extends to the bottom of casing, the bottom of casing is provided with the fixing base, the fixing base with the symmetry is provided with a plurality of support columns between the valve gap, the bottom of fixing base is provided with the valve body, the inboard symmetry of valve body is provided with the disk seat, two be provided with a plurality of fixed columns one between the disk seat, the fixed column one all is provided with the spring, the top of spring is provided with the floating bar, the valve rod bottom is connected with the flashboard. Has the advantages that: structural design is reasonable, can realize two way seal, utilizes the sediment that the downstream of flashboard can clear up the valve body terminal surface simultaneously.

Description

Special knife-type gate valve of SOx/NOx control

Technical Field

The utility model relates to the technical field of valves, particularly, relate to a special sword type gate valve of SOx/NOx control.

Background

The opening and closing part of the gate valve is a gate plate, the moving direction of the gate plate is vertical to the fluid direction, and the gate valve can only be fully opened and fully closed and cannot be adjusted and throttled. The gate plate is provided with two sealing surfaces, the two sealing surfaces of the most common mode gate valve form a wedge shape, the wedge angle is different along with the valve parameters, the wedge angle is usually 5 degrees, and the gate plate of the wedge type gate valve can be made into a whole, namely a rigid gate plate; the gate plate can also be made into a gate plate capable of generating micro deformation so as to improve the manufacturability of the gate plate and compensate the deviation of the angle of the sealing surface in the machining process, and the gate plate is called an elastic gate plate. When the gate valve is closed, the sealing surface can be sealed only by medium pressure, namely, the sealing surface of the gate plate is pressed to the valve seat on the other side by the medium pressure to ensure the sealing of the sealing surface, namely, the gate valve is self-sealed.

Traditional gate valve inner chamber flashboard below all can set up the open slot and realize closed sealedly with the cooperation flashboard, but the long back of live time because the open slot on flashboard lower limit can be filled up to impurity in medium or the pipeline, causes the flashboard sealed not tight, needs frequent dismouting maintenance, has directly influenced normal production order. In addition, the situation that the bidirectional sealing of the gate valve is required often occurs in actual production.

SUMMERY OF THE UTILITY MODEL

To the problem in the correlation technique, the utility model provides a special sword type gate valve of SOx/NOx control to overcome the above-mentioned technical problem that current correlation technique exists.

Therefore, the utility model discloses a specific technical scheme as follows:

the utility model provides a special sword type gate valve of SOx/NOx control, includes the casing, the casing top is provided with the valve gap, the top of valve gap is provided with the hand wheel, the central point of hand wheel puts and is provided with the valve rod, just the valve rod runs through the valve gap extends to the bottom of casing, the bottom of casing is provided with the fixing base, the fixing base with the symmetry is provided with a plurality of support columns between the valve gap, the bottom of fixing base is provided with the valve body, the inboard symmetry of valve body is provided with the disk seat, two be provided with a plurality of fixed columns one between the disk seat, the fixed column one all is provided with the spring, the top of spring is provided with the superficial strip, the valve rod bottom is connected with the.

Further, in order to make the V-arrangement groove cooperatees with the protruding strip of toper, has realized the gate valve both way seal, has guaranteed the leakproofness of gate valve, two the disk seat relative position all sets up the arch, the V-arrangement groove has all been seted up on protruding top.

Further, in order to make the flashboard can pass through connect the socket with the valve rod is connected and passes through screw hole and screw cooperate, and then form a whole, make the valve rod can drive the flashboard is in order to carry out throttle or break-make medium, the top of flashboard is provided with connects the socket, the symmetry is provided with a plurality of screw holes on connecting the socket, the bottom symmetry of flashboard is provided with oblique shovel.

Further, in order to make the flashboard when the downstream is closed, through wear-resisting sealing strip with the valve body inner chamber terminal surface contacts, and then realizes sealedly, the both sides face symmetry of flashboard is provided with wear-resisting sealing strip.

Further, for the messenger the floating strip can be filled all the time gap between the disk seat to avoid dirt, impurity to fall into and lead to in the gap the flashboard is unable sealed, and then influences the use of gate valve, the floating strip is circular-arc structure, the bottom of floating strip is provided with a plurality of fixed column two, the bilateral symmetry of fixed column two is provided with the protruding strip of toper, the top both sides of floating strip are provided with the chamfer.

Furthermore, the installation and the disassembly of the gate valve are facilitated, the gate valve is convenient to maintain daily or replace easily damaged parts, the maintenance time is saved, the working efficiency is improved, and the valve cover is connected with the shell, the fixed seat and the valve body through screws.

The utility model has the advantages that:

(1) the utility model has the advantages of reasonable design, can realize two way seal, utilize the deposit that the valve body terminal surface can be cleared up in the downstream of flashboard simultaneously.

(2) Through setting up the V-arrangement groove and cooperate with protruding strip of toper to realized the gate valve both way seal, guaranteed the leakproofness of gate valve.

(3) Cooperate through setting up the floating strip and spring to make the floating strip can fill the gap between the disk seat all the time, in order to avoid dirt, impurity to fall into and lead to the unable sealing of flashboard in the gap, and then influence the use of gate valve.

Drawings

Fig. 1 is a schematic structural diagram of a knife gate valve special for desulfurization and denitrification according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural diagram of a floating strip of a knife gate valve special for desulfurization and denitrification according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a gate plate of a special knife gate valve for desulfurization and denitrification according to the embodiment of the utility model.

In the figure:

1. a housing; 2. a valve cover; 3. a hand wheel; 4. a valve stem; 5. a fixed seat; 6. a support pillar; 7. a valve body; 8. a valve seat; 801. a protrusion; 802. a V-shaped groove; 9. fixing a first column; 10. a spring; 11. floating strips; 1101. fixing a second column; 1102. a conical raised strip; 1103. chamfering; 12. a shutter plate; 1201. a connecting socket; 1202. a screw hole; 1203. obliquely shoveling; 1204. wear-resistant sealing strips.

Detailed Description

Referring to the drawings and the detailed description, as shown in fig. 1-4, a knife gate valve for desulfurization and denitration according to an embodiment of the present invention comprises a housing 1, a valve cap 2 is disposed on the top end of the housing 1, a hand wheel 3 is disposed on the top end of the valve cap 2, a valve rod 4 is disposed at the center of the hand wheel 3, the valve rod 4 penetrates the valve cap 2 and extends to the bottom of the housing 1, a fixing seat 5 is disposed at the bottom end of the housing 1, a plurality of support pillars 6 are symmetrically disposed between the fixing seat 5 and the valve cap 2, a valve body 7 is disposed at the bottom end of the fixing seat 5, a valve seat 8 is symmetrically disposed at the inner side of the valve body 7, a plurality of first fixing columns 9 are disposed between the two valve seats 8, each first fixing column 9 is provided with a spring 10, and a floating strip 11, the bottom of the valve rod 4 is connected with a flashboard 12, the flashboard 12 penetrates through the fixing seat 5 and extends to the inner side of the valve body 7, and the flashboard 12 is plated with a compact ceramic layer in the inner cavity of the valve body 7 and on the surface of the floating strip 11.

By means of the above scheme to make structural design reasonable, can realize two-way seal, utilize the sediment that the downward movement of flashboard can clear up the valve body terminal surface simultaneously.

In one embodiment, the two valve seats 8 are provided with protrusions 801 at opposite positions, and the top ends of the protrusions 801 are provided with V-shaped grooves 802, so that the V-shaped grooves 802 are matched with the tapered protruding strips 1102, thereby realizing bidirectional sealing of the gate valve and ensuring the sealing performance of the gate valve.

In one embodiment, a connecting socket 1201 is arranged at the top end of the gate plate 12, a plurality of screw holes 1202 are symmetrically arranged on the connecting socket 1201, and oblique shovels 1203 are symmetrically arranged at the bottom end of the gate plate 12, so that the gate plate 12 can be connected with the valve rod 4 through the connecting socket 1201 and matched with screws through the screw holes 1202 to form a whole, and the valve rod 4 can drive the gate plate 12 to throttle or make and break media.

In one embodiment, wear-resistant sealing strips 1204 are symmetrically arranged on two side surfaces of the gate plate 12, and the diameters of the wear-resistant sealing strips 1204 are matched with the diameter of the inner cavity of the valve body 7, so that when the gate plate 12 moves downwards and is closed, the wear-resistant sealing strips 1204 are in contact with the end surface of the inner cavity of the valve body 7, and sealing is achieved.

In one embodiment, the floating strip 11 is of an arc-shaped structure, a plurality of second fixing columns 1101 are arranged at the bottom end of the floating strip 11, tapered protruding strips 1102 are symmetrically arranged on two sides of each second fixing column 1101, and chamfers 1103 are arranged on two sides of the top end of the floating strip 11, so that the floating strip 11 can always fill a gap between the valve seats 8, and dirt and impurities are prevented from falling into the gap to cause the sealing failure of the gate plate 12, and further the use of the gate valve is prevented from being influenced.

In one embodiment, the valve cover 2 is connected with the housing 1, the fixing seat 5 and the valve body 7 through screws, so that the gate valve is convenient to mount and dismount, convenience is brought to daily maintenance or replacement of vulnerable parts of the gate valve, maintenance time is saved, and working efficiency is improved.

The working principle is as follows: during the use, drive valve rod 4 through rotating hand wheel 3 and reciprocate, valve rod 4 drive flashboard 12 moves down, until contacting with superficial strip 11, flashboard 12 drives superficial strip 11 and moves down, make toper protruding strip 1102 identical with V-arrangement groove 802, thereby realize closing and two-way seal of gate valve, flashboard 12 moves down in-process oblique shovel 1203 removes the deposit on the disk seat 8 terminal surface simultaneously, when the gate valve was opened, flashboard 12 moved up, superficial strip 11 gets back to the initial position under the effect of spring 10, fill the gap between the disk seat 8 all the time, in order to avoid impurity dirt to fall into the gap and hinder the closure of flashboard 12.

To sum up, with the aid of the above technical scheme of the utility model, through setting up V-arrangement groove 802 cooperatees with protruding strip 1102 of toper to realized the gate valve both way seal, guaranteed the leakproofness of gate valve. Through setting up the floating strip 11 with spring 10 cooperatees, thereby makes floating strip 11 can fill all the time gap between the disk seat 8 to avoid dirt, impurity to fall into and lead to in the gap flashboard 12 can not be sealed, and then influence the use of gate valve. Thereby make structural design reasonable, can realize two-way seal, utilize the downward movement of flashboard simultaneously can clear up the deposit of valve body terminal surface.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a special sword type gate valve of SOx/NOx control, includes casing (1), its characterized in that, casing (1) top is provided with valve gap (2), the top of valve gap (2) is provided with hand wheel (3), the central point of hand wheel (3) puts and is provided with valve rod (4), and valve rod (4) run through valve gap (2) and extend to the bottom of casing (1), the bottom of casing (1) is provided with fixing base (5), a plurality of support columns (6) are symmetrically arranged between fixing base (5) and valve gap (2), the bottom of fixing base (5) is provided with valve body (7), valve body (7) inboard symmetry is provided with valve seat (8), two be provided with a plurality of fixed column (9) between valve seat (8), fixed column (9) all are provided with spring (10), the top of spring (10) is provided with superficial strip (11), the bottom end of the valve rod (4) is connected with a flashboard (12), and the flashboard (12) penetrates through the fixed seat (5) and extends to the inner side of the valve body (7).

2. The special knife gate valve for desulfurization and denitrification according to claim 1, wherein protrusions (801) are arranged at opposite positions of the two valve seats (8), and the top ends of the protrusions (801) are provided with V-shaped grooves (802).

3. The knife gate valve special for desulfurization and denitrification according to claim 1, wherein a connecting socket (1201) is arranged at the top end of the gate plate (12), a plurality of screw holes (1202) are symmetrically arranged on the connecting socket (1201), and inclined shovels (1203) are symmetrically arranged at the bottom end of the gate plate (12).

4. The special knife gate valve for desulfurization and denitrification according to claim 3, wherein the two side surfaces of the gate plate (12) are symmetrically provided with wear-resistant sealing strips (1204).

5. The knife gate valve special for desulfurization and denitrification according to claim 1, wherein the floating strip (11) is of an arc-shaped structure, a plurality of second fixing columns (1101) are arranged at the bottom end of the floating strip (11), tapered protruding strips (1102) are symmetrically arranged on two sides of each second fixing column (1101), and chamfers (1103) are arranged on two sides of the top end of the floating strip (11).

6. The knife gate valve special for desulfurization and denitrification according to claim 1, wherein the valve cover (2) is connected with the housing (1), the fixing seat (5) and the valve body (7) through screws.