CN201561139U

CN201561139U - High-pressure heavy-caliber flat-plate gate valve

Info

Publication number: CN201561139U
Application number: CN2009202119698U
Authority: CN
Inventors: 张建权; 纪效轩
Original assignee: Shanghai SK Petroleum Chemical Equipment Corp Ltd
Current assignee: Shanghai SK Petroleum Equipment Co Ltd
Priority date: 2009-11-06
Filing date: 2009-11-06
Publication date: 2010-08-25
Anticipated expiration: 2019-11-06

Abstract

The utility model relates to a high-pressure heavy-caliber flat-plate gate valve which comprises a valve body and a valve cover, and is characterized by further comprising a transmission component passing through the valve cover; a sealing component is arranged inside the valve body and is connected with the transmission component; the transmission component comprises a valve cap, a valve rod passing through the valve cap, a bearing sheathed at one end of the valve rod, and a bearing press cover connected with the valve rod; the upper part of the valve cover is connected with the valve cap, and the lower part thereof is connected with the valve body; the valve rod passes through the valve cap from the middle part thereof; the sealing component comprises a valve plate and a valve seat; the valve seat is arranged inside the valve body; and the valve plate is clamped in the valve seat and is connected with the bottom end of the valve rod. As the valve rod is connected with the bearing press cover by matched screw thread, the tensile stress generated by the action of a medium for the valve rod can be released on the bearing press cover by the matched screw thread, the driving force pushed by rotation of a hand wheel is lightened, and the acting force can be automatically released. A guide groove is arranged at the lower part of the valve seat, so that the valve plate can be jointed with the guide groove and vertically move, a sealing part of the valve plate is protected from being scoured by the medium, and further, the service life of the valve plate is prolonged.

Description

The high-pressure large-caliber plate valve

Technical field

The utility model relates to a kind of gate valve, particularly a kind of high-pressure large-caliber plate valve.

Background technique

In the prior art, the valve plate of gate valve is done elevating movement and is reached the purpose of connecting or blocking the medium in the pipeline along valve seat under the drive of valve rod.Because the valve plate of gate valve is to be vertically installed in the valve pocket of valve body, with MEDIA FLOW to perpendicular, the sealing position of valve plate is directly washed away by medium, and damage is easily arranged, thereby influences the sealability and the working life of valve plate.On the other hand, when gate valve was worked, the tensile stress that medium produces the valve rod effect is removal automatically, the driving force that the rotation hand wheel needs are very big, influenced the efficient that execute-in-place opens and closes gate valve, made the gate valve of prior art can't be applicable to the working environment of medium high pressure.In the prior art simultaneously, can't in use change Sealings such as valve plate, valve seat, the maintenance work inconvenience of gate valve.

The model utility content

The purpose of this utility model is to provide a kind of high-pressure large-caliber plate valve, can protect the sealing position of valve plate not directly washed away by medium; Automatically the removal medium is to the active force of valve rod; Can in use change Sealing.

In order to achieve the above object, the technical solution of the utility model provides a kind of high-pressure large-caliber plate valve, comprises valve body 30, valve gap 40, is characterized in also comprising transmitting assemblies 10, black box 20; Transmitting assemblies 10 passes valve gap 40 and is connected with black box 20; Black box 20 is arranged in the valve body 30; Transmitting assemblies 10 comprises the bearing gland 131 that runs through the valve rod 12 that is provided with, the bearing 132 that is set in valve rod 12 1 ends in the middle of the bonnet 14, bonnet 14, is connected with valve rod 12; Valve gap 40 tops are connected with bonnet 14, fixedly connected with valve body 30 in the bottom, and valve rod 12 passes in the middle of valve gap 40; Black box 20 comprises valve plate 21, valve seat 22; Valve seat 22 is arranged in the valve body 30; Valve plate 21 is connected with valve rod 12 bottoms, and valve plate 21 is folded in the valve seat 22.

Above-mentioned valve rod 12 is fixedlyed connected by the screw thread that cooperatively interacts with bearing gland 131; Bonnet 14 is fixedlyed connected by the screw thread that cooperatively interacts with valve gap 40.

Above-mentioned transmitting assemblies 10 also comprises the handwheel 11 that is connected with valve rod 12 tops.

This plate valve also comprises Gland 50, and above-mentioned Gland 50 is arranged between bonnet 14 and the valve gap 40; Above-mentioned valve gap 40 is provided with filler with the position that valve rod 12 is connected.

Above-mentioned valve gap 40 is fixedly connected on the valve body 30 by bolt and nut.

Above-mentioned valve body 30 comprises vertical valve pocket 31 and horizontal valve pocket 31; Valve seat 22 is arranged on the position of vertical valve pocket 31 and horizontal valve pocket 31 intersections, and valve seat 22 is provided with and the horizontal identical through hole of valve pocket 31 internal diameters; Valve seat 22 bottoms also are provided with guiding groove 221, and above-mentioned guiding groove 221 vertical fixing are arranged on the bottom of vertical valve pocket 31.

Above-mentioned valve plate 21 is arranged on the center line of valve body 30 vertical valve pockets 31, with MEDIA FLOW to perpendicular; Fixedly connected by Stem Mut 121 with valve rod 12 in above-mentioned valve plate 21 tops, valve plate 21 bottoms are provided with the identical through hole of horizontal valve pocket 31 internal diameters with valve body 30;

Above-mentioned valve plate 21 is folded in the guiding groove 221 of valve seat 22.

Arbitrary end of above-mentioned valve body 30 all can be used as the entry end or the outlet end of medium.

Above-mentioned valve seat 22 with the both sides outer wall of through hole adjacent regions on be provided with a plurality of seal grooves, above-mentioned a plurality of seal grooves are provided with a plurality of seal rings 222.

Also be provided with grease nipple 141 on the above-mentioned bonnet 14.

The utility model high-pressure large-caliber plate valve compared with prior art, its advantage is:

The utility model valve rod and bearing gland are owing to fixedly connected by the screw thread that cooperatively interacts, the tensile stress that medium produces the valve rod effect can be passed through the matching thread removal to bearing gland, thereby reduce the stressed of valve rod, alleviate the driving force that the handwheel rotation advances, realized the automatic removal of active force;

The utility model is owing to be provided with guiding groove in the valve seat bottom, the valve plate guiding groove of can fitting is moved at vertical direction, when standard-sized sheet or complete shut-down state, guarantee that the sealed department potential energy of valve plate bottom is fitted with valve seat all the time, protection valve plate sealed department position is not directly washed away by medium, thereby increases the service life;

The utility model has reduced the surface friction drag when valve rod advances owing to be provided with bearing and bearing gland, has also limited the moving range of valve rod above-below direction;

The utility model makes the hard sealing that is metal to metal between valve seat and valve body, valve seat and the valve plate owing to be provided with high strength, resistant to elevated temperatures metal o-ring, thus raising under hyperbaric environment to the sealability of various media;

The utility model compresses filler owing to be provided with Gland from the top, guarantees that medium can not have excellent sealing performance from the position leakage that valve gap is connected with valve rod;

The utility model can be changed black box easily owing to be provided with the valve gap that can separate with valve body, makes field maintenance easy and simple to handle;

The utility model can regularly inject butter from grease nipple bearing is carried out maintaining owing to be provided with grease nipple, can avoid the interlock of thrust-bearing;

The utility model is because the horizontal valve pocket of valve body is identical with through hole internal diameter on valve seat, the valve plate and be connected, MEDIA FLOW can not change its flow direction when valve plate, the utility model can not produce very big fluid resistance, so can be applicable to the pipeline of high-pressure large-caliber.

Description of drawings

Fig. 1 is the general structure schematic representation of the utility model high-pressure large-caliber plate valve;

Fig. 2 is the schematic representation of the utility model high-pressure large-caliber plate valve full-gear;

Fig. 3 is the schematic representation of the utility model high-pressure large-caliber plate valve complete shut-down state;

Fig. 4 is the valve seat of the utility model high-pressure large-caliber plate valve and the structural representation of valve plate.

Embodiment

Below in conjunction with description of drawings embodiment of the present utility model.

See also shown in Figure 1ly, the utility model high-pressure large-caliber plate valve comprises transmitting assemblies 10, black box 20, valve body 30, valve gap 40.

Transmitting assemblies 10 passes valve gap 40 and is connected with black box 20; Black box 20 is arranged in the valve body 30; Valve gap 40 bottoms are connected with valve body 30.

Transmitting assemblies 10 comprises handwheel 11, bearing 132, bearing gland 131, valve rod 12, bonnet 14.Run through being provided with valve rod 12 in the middle of the bonnet 14, handwheel 11 is fixedlyed connected with valve rod 12 tops, and handwheel 11 rotating band ovable valve stems 12 advance in valve body 30.Bearing 132 is fixedly installed on the inner chamber of bonnet 14 by bearing gland 131, bearing 132 is set in an end of valve rod 12, closely cooperate with valve rod 12, valve rod 12 and bearing gland 131 are threaded by cooperatively interacting of being provided with, surface friction drag when the setting of bearing 132 and bearing gland 131 has reduced valve rod 12 and advances has also limited the moving range of valve rod 12 above-below directions.When gate valve was worked, the medium tensile stress that 12 effects produce to valve rod was passed through the matching thread removal to bearing gland 131, thereby reduces the stressed of valve rod 12, had alleviated the driving force that handwheel 11 rotations advance, and realized the automatic removal of active force.

Also be provided with grease nipple 141 on the bonnet 14, regularly inject butter bearing 132 is carried out maintaining, can avoid the interlock of thrust-bearing 132 from grease nipple 141.

Valve gap 40 tops are arranged with bonnet 14, and are fixedly connected by the screw thread that cooperatively interacts, and are provided with Gland 50 between valve gap 40 and the bonnet 14.Valve rod 12 passes in the middle of valve gap 40, and valve gap 40 is provided with filler with the position that valve rod 12 is connected, and filler is compressed from the top by Gland 50, and the assurance medium can be from the position leakage that valve gap 40 is connected with valve rod 12.Fixedly connected with valve body 30 by bolt and nut in valve gap 40 bottoms; With valve gap 40 with can change black box 20 easily after valve body 30 separates, make field maintenance easy and simple to handle.

Black box 20 comprises valve plate 21, valve seat 22.Valve plate 21 is arranged on the center line of valve body 30 vertical valve pockets 31, with MEDIA FLOW to perpendicular.Fixedly connected by Stem Mut 121 with valve rod 12 in valve plate 21 tops, valve plate 21 bottoms are provided with the identical through hole of horizontal valve pocket 31 internal diameters with valve body 30.Valve plate 21 is folded in the guiding groove 221 of valve seat 22.

Please cooperate referring to Fig. 1 and shown in Figure 4, valve seat 22 is arranged on vertical valve pocket 31 of valve body 30 and the position that horizontal valve pocket 31 intersects, valve seat 22 is provided with and the horizontal identical through hole of valve pocket 31 internal diameters, with valve seat 22 outer walls of through hole adjacent regions both sides on be provided with a plurality of seal grooves, described a plurality of seal grooves are provided with a plurality of seal rings 222.Because seal ring 222 adopted high strength, resistant to elevated temperatures metallic material, make the hard sealing that is metal to metal between valve seat 22 and valve body 30, valve seat 22 and the valve plate 21, thereby raising under hyperbaric environment to the sealability of various media.Guiding groove 221 vertical fixing of valve seat 22 bottoms are arranged on the bottom of vertical valve pocket 31; can fit guiding groove 221 of valve plate 21 is moved at vertical direction; when standard-sized sheet or complete shut-down state; the sealed department potential energy that guarantees valve plate 21 bottoms is fitted with valve seat 22 all the time; protection valve plate 21 sealing positions are not directly washed away by medium, thereby increase the service life.

Please cooperate referring to illustrated in figures 1 and 2, arbitrary end of the valve body 30 of the utility model high-pressure large-caliber plate valve all can be used as the entry end or the outlet end of medium.During valve plate 21 full-gears, medium enters from the entry end of valve body 30, flows out from outlet end by the through hole on valve plate 21 bottoms and the valve seat 22.Because the horizontal valve pocket 31 of valve body 30 is identical with through hole internal diameter on valve seat 22, the valve plate 21 and be connected, MEDIA FLOW can not change its flow direction when valve plate 21, the utility model can not produce very big fluid resistance, so can be applicable to the pipeline of high-pressure large-caliber.

Please cooperate referring to Fig. 1 and shown in Figure 3, during closing gate valve, rotation hand wheel 11 drives valve rod 12, and valve plate 21 is moved down along the guiding groove 221 of valve seat 22, blocks medium by valve plate 21 tops.In order to prevent under high temperature and high pressure environment influence, the deadlock phenomenon that valve plate 21 occurs, handwheel 11 rotated to the end after, fitted in valve pocket 31 bottoms of valve plate 21 bottoms and valve body 30, turn round 1/4 or 1/2 again and enclose, with this complete shut-down state as valve plate 21.During valve plate 21 complete shut-down states, medium flows into from valve body 30 entry ends, and the through hole of valve seat 22 entry ends of flowing through promotes the outlet end motion of valve plate 21 to valve seat 22, and valve plate 21 and valve seat 22 can be fitted more closely, reaches at outlet end to seal.

Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple modification of the present utility model with to substitute all will be conspicuous.Therefore, protection domain of the present utility model should be limited to the appended claims.

Claims

1. a high-pressure large-caliber plate valve comprises valve body (30), valve gap (40), it is characterized in that: also comprise transmitting assemblies (10), black box (20);

Described transmitting assemblies (10) passes valve gap (40) and is connected with black box (20);

Described black box (20) is arranged in the valve body (30);

Described transmitting assemblies (10) comprises the bearing gland (131) that runs through the valve rod (12) that is provided with, the bearing (132) that is set in valve rod (12) one ends in the middle of the bonnet (14), bonnet (14), is connected with valve rod (12);

Described valve gap (40) top is connected with bonnet (14), fixedlys connected with valve body (30) in the bottom, and described valve rod (12) passes in the middle of valve gap (40);

Described black box (20) comprises valve plate (21), valve seat (22); Described valve seat (22) is arranged in the valve body (30); Described valve plate (21) is connected with valve rod (12) bottom, and valve plate (21) is folded in the valve seat (22).

2. high-pressure large-caliber plate valve as claimed in claim 1 is characterized in that, described valve rod (12) is fixedlyed connected by the screw thread that cooperatively interacts with bearing gland (131); Described bonnet (14) is fixedlyed connected by the screw thread that cooperatively interacts with valve gap (40).

3. high-pressure large-caliber plate valve as claimed in claim 1 is characterized in that, described transmitting assemblies (10) also comprises the handwheel (11) that is connected with valve rod (12) top.

4. high-pressure large-caliber plate valve as claimed in claim 1 is characterized in that, this plate valve also comprises Gland (50), and described Gland (50) is arranged between bonnet (14) and the valve gap (40); Described valve gap (40) is provided with filler with the position that valve rod (12) is connected.

5. high-pressure large-caliber plate valve as claimed in claim 1 is characterized in that, described valve gap (40) is fixedly connected on the valve body (30) by bolt and nut.

6. high-pressure large-caliber plate valve as claimed in claim 1 is characterized in that, described valve body (30) comprises vertical valve pocket (31) and horizontal valve pocket (31);

Described valve seat (22) is arranged on the position of vertical valve pocket (31) and horizontal valve pocket (31) intersection, and valve seat (22) is provided with and the horizontal identical through hole of valve pocket (31) internal diameter;

Described valve seat (22) bottom also is provided with guiding groove (221), and described guiding groove (221) vertical fixing is arranged on the bottom of vertical valve pocket (31).

7. high-pressure large-caliber plate valve as claimed in claim 1 is characterized in that, described valve plate (21) is arranged on valve body (30) vertically on the center line of valve pocket (31), with MEDIA FLOW to perpendicular;

Fixedly connected by Stem Mut (121) with valve rod (12) in described valve plate (21) top,

Valve plate (21) bottom is provided with the identical through hole of horizontal valve pocket (31) internal diameter with valve body (30);

Described valve plate (21) is folded in the guiding groove (221) of valve seat (22).

8. high-pressure large-caliber plate valve as claimed in claim 1 is characterized in that, arbitrary end of described valve body (30) all can be used as the entry end or the outlet end of medium.

9. high-pressure large-caliber plate valve as claimed in claim 1 is characterized in that, described valve seat (22) with the both sides outer wall of through hole adjacent regions on be provided with a plurality of seal grooves, described a plurality of seal grooves are provided with a plurality of seal rings (222).

10. high-pressure large-caliber plate valve as claimed in claim 1 is characterized in that, also is provided with grease nipple (141) on the described bonnet (14).