CN210397729U

CN210397729U - Pneumatic Y-shaped regulating valve for hot-melt salt

Info

Publication number: CN210397729U
Application number: CN201921191382.5U
Authority: CN
Inventors: 汪新春; 杨子; 杨硕; 张耀辉; 李碧; 李新福; 王军; 王浩; 李天保; 穆春阳; 高阳
Original assignee: Wuzhong Zhongchuang Valves Co ltd
Current assignee: Wuzhong Zhongchuang Valves Co ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-04-24
Anticipated expiration: 2029-07-26

Abstract

A pneumatic Y-type regulator valve for hot melt salt comprising: a valve body and a valve core; a vertical valve cavity and a medium flow passage are arranged in the valve body; a valve seat matched with the valve core is arranged in the valve cavity, sealing surfaces are symmetrically arranged on the upper side and the lower side of the inner ring of the circular ring of the valve seat, and the valve core is arranged in the valve cavity and can be in sealing fit with any one sealing surface of the valve seat; and a backflow conical surface with a set conical surface angle is also arranged above the valve seat in the valve cavity. The utility model discloses a set up the axis angle of valve pocket and medium runner, make the structure compacter to can reduce the flow resistance of medium runner, through set up the backward flow conical surface in the valve pocket, no matter be connected with horizontal pipeline or with vertical pipe connection like this, can both make the medium flow back fast, and be difficult for staying in the valve pocket, reduce the risk of damage, bilateral symmetry sets up and the sealed complex sealed face of case about the disk seat, and it is more convenient to maintain when sealed problem appears in the disk seat, and practice thrift the cost.

Description

Pneumatic Y-shaped regulating valve for hot-melt salt

The technical field is as follows:

the utility model relates to the technical field of valves, in particular to pneumatic Y type governing valve for hot melt salt.

Background art:

the fused salt is used as a heat transfer and storage medium with high heat capacity, the working temperature can reach 560 ℃, and the fused salt has incomparable advantages in solar photo-thermal power generation compared with the traditional heat transfer oil and other media. The molten salt valve is used as a key device in a molten salt energy storage system of the photo-thermal power station, and plays a vital role in the safety and reliability of the operation of the whole system. The medium flow and pressure in the molten salt pipeline are required to be adjusted and controlled through a high-temperature-resistant and corrosion-resistant molten salt adjusting valve; because the molten salt can become sticky, the mobility becomes poor and even crystallization occurs when the temperature of the existing molten salt medium is lower than 220 ℃, the basic use requirement of the molten salt regulating valve can be met only by selecting the valve type with low flow resistance and good fluidity. In the existing regulating valve types, a butterfly valve, a V-shaped ball valve and a cam deflection valve are all angular travel valves, valve rods cannot be sealed by corrugated pipes, the risk of leakage of media through a filler exists, and the regulating valve is not suitable for frequent regulating occasions of hot molten salts. Therefore, a straight stroke regulating valve with a bellows seal becomes the first choice of the molten salt regulating valve. Select the angular form governing valve to install as the fused salt governing valve and can only turn to the position at pipeline 90, there is certain limitation, straight-through globe (also be the ball valve) type governing valve, the valve body runner is S-shaped usually, the flow resistance is great, no matter pipeline level or perpendicular installation, the inside dead angle that can all have easy hydrops of valve body, in order to prevent that the fused salt crystallization from leading to the fact the destruction to the valve, need heat tracing device usually, increase heat tracing device, can make the complicacy that the valve structure becomes, the cost increases, to the user, can increase the energy consumption, offset equivalent power generation efficiency, the economic nature is not good.

The invention content is as follows:

in view of the above, it is necessary to design a pneumatic Y-type regulating valve for hot-melt salt to improve the flow permeability of the molten salt and simplify the structural design of the valve to reduce the use cost.

A pneumatic Y-type regulator valve for hot melt salt comprising: a valve body and a valve core; a vertical valve cavity and a medium flow passage are arranged in the valve body; the medium flow passage comprises a medium inflow passage and a medium outflow passage; the medium inflow channel and the medium outflow channel are respectively arranged at two sides of the valve cavity and are respectively communicated with the valve cavity; the axial line of the medium inflow channel and the axial line of the medium outflow channel respectively form different set included angles with the axial line of the valve cavity; a valve seat matched with the valve core is arranged in the valve cavity, sealing surfaces are symmetrically arranged on the upper side and the lower side of the inner ring of the circular ring of the valve seat, and the valve core is arranged in the valve cavity and can be in sealing fit with any one sealing surface of the valve seat; and a backflow conical surface with a set conical surface angle is also arranged above the valve seat in the valve cavity.

Preferably, the valve further comprises a valve seat pressing sleeve, a valve cover and a valve rod mechanism;

the valve rod mechanism comprises a valve rod connected with the valve core and a support sleeve sleeved on the valve rod; the outer side of the support sleeve is provided with a step structure, and the step structure is connected with the valve core through a corrugated pipe;

the valve seat pressing sleeve is positioned in the valve cavity and abuts against the valve seat, the supporting sleeve is positioned in the valve cavity and abuts against the valve seat pressing sleeve, the valve cover is fixed on the valve body and seals an opening of the valve cavity, and the valve cover abuts against the supporting sleeve.

Preferably, the support sleeve is provided with a hexagonal hole, and the valve rod is provided with a hexagonal structure corresponding to the hexagonal hole; and a guide sleeve for guiding the valve rod is arranged in the support sleeve.

Preferably, the valve cover is provided with a filler culvert in sealing fit with the valve rod.

Preferably, the set included angle is 45-50 degrees.

Preferably, the set conical surface angle is between 60 and 90 degrees.

In the above embodiment, through the axis angle that sets up valve pocket and medium runner, make the structure compacter to can reduce the flow resistance of medium runner, through set up the backward flow conical surface in the valve pocket, no matter be connected with horizontal pipeline or with vertical pipe connection like this, can both make the medium flow back fast, be difficult for staying in the valve pocket, reduce the risk of damage, bilateral symmetry sets up the sealed face of sealed complex with the case about the disk seat, it is more convenient to maintain when sealed problem appears in the disk seat, and practice thrift the cost.

Description of the drawings:

FIG. 1 is a schematic structural view of a pneumatic Y-shaped regulating valve for hot-melt salt provided by the utility model;

fig. 2 is a schematic structural diagram of the valve body provided by the present invention;

fig. 3 is a schematic structural diagram of the valve seat provided by the present invention;

fig. 4 is a schematic structural diagram of the valve rod mechanism provided by the present invention;

fig. 5 is a schematic structural view of the valve seat pressing sleeve provided by the present invention;

FIG. 6 is a schematic structural view of the pneumatic Y-shaped regulating valve for hot-melt salt of the present invention when connecting to a horizontal pipeline;

fig. 7 is a schematic structural diagram of the pneumatic Y-type regulating valve for hot-melt salt when connecting a vertical pipeline.

Reference numbers in the figures: valve body-1 valve core-2 valve cavity-3 reflux conical surface-31 medium flow passage-4

Media inflow channel-41 media outflow channel-42 valve seat-5 sealing surface-51

Valve seat pressing sleeve-6 flow window-61 valve cover-7 pneumatic actuator-8

Valve rod-9 support sleeve-10 breathing hole-101 corrugated pipe-11

Guide sleeve-12 packing gasket-13 packing-14 packing gland-15

Packing press plate-16 valve seat sealing gasket-17 valve cover sealing gasket-18.

The specific implementation mode is as follows:

as shown in fig. 1 and 2, the pneumatic Y-type regulating valve for hot melt salt comprises a valve body 1 and a valve core 2, wherein a vertical valve cavity 3 and a medium flow channel 4 are arranged in the valve body 1, the medium flow channel 4 is used for medium to pass through and comprises a medium inflow channel 41 and a medium outflow channel 42, and the medium inflow channel 41 and the medium outflow channel 42 are respectively arranged at two sides of the valve cavity 3 and are respectively communicated with the valve cavity 3. The axis of the medium inflow passage 41 and the axis of the medium outflow passage 42 are at different set angles, respectively, from the axis of the valve chamber 3. The set included angle is 45-50 degrees, such as 46 degrees, 47 degrees, 48 degrees or 49 degrees. For convenience of description, an angle formed by the axis of the medium inflow passage 41 and the axis of the valve chamber 3 is set as a first angle, and an angle formed by the axis of the medium outflow passage 42 and the axis of the valve chamber 3 is set as a second angle. In this embodiment, the first included angle is larger than the second included angle, for example, when the first included angle is 49 °, the second included angle can be set to be 46 °, 47 ° or 48 °, and the difference between the first included angle and the second included angle is not large, so that the flow resistance is relatively small when the medium passes through the medium flow channel 4, which is helpful for the medium to pass through.

With reference to fig. 1, a valve seat 5 is disposed in the valve cavity 3 and is engaged with the valve core 2, referring to fig. 3, the valve seat 5 is circular, and sealing surfaces 51 are symmetrically disposed on upper and lower sides of an inner ring of the circular ring of the valve seat 5, and the sealing surfaces 51 are conical surfaces. The valve core 2 is arranged in the valve cavity 3 and can be in sealing fit with any one sealing surface 51 of the valve seat 5, the valve core 2 is provided with a matching surface in sealing fit with the sealing surface 51, and the matching surface is also a conical surface. The valve core 2 is matched with the valve seat 5 in a sealing mode to achieve the interception of the medium flow passage 4. Through the arrangement, when one of the sealing surfaces 51 of the valve seat 5 is damaged and the sealing problem occurs, the valve seat 5 is turned over by 180 degrees and is installed in the valve cavity 3 again, the sealing fit with the valve core 2 can be recovered, the valve core is relatively more convenient to maintain, and the cost is saved.

During specific setting, the two sealing surfaces 51 of the valve seat 5 can be reinforced by means of surfacing, spray welding, hard alloy embedding and the like, so that the heat resistance of the sealing surfaces 51 is improved, and the anti-scouring and anti-corrosion performance of the sealing surfaces 51 on hot melt salt serving as a medium is improved.

With continued reference to fig. 2, a backflow cone 31 with a set cone angle is further disposed in the valve chamber 3 above the valve seat 5, and the set cone angle is between 60 ° and 90 °, for example, 70 ° or 80 °. By arranging the backflow conical surface 31 in the valve cavity 3, as shown in fig. 6 and 7, when the regulating valve is used in a connection manner on a horizontal pipeline or a vertical pipeline, a medium entering the valve cavity 3 can quickly flow back to the medium flow channel 4 through the backflow conical surface 31, and the medium is not easy to remain in the valve cavity 3, so that the regulating valve can be prevented from being damaged by crystallization when hot molten salt is used as the medium.

With continued reference to fig. 1, the pneumatic Y-type regulating valve for hot-melt salt of the present application further includes a valve seat pressing sleeve 6, a valve cover 7 and a valve rod mechanism. Referring to fig. 4, the valve rod mechanism includes a valve rod 9 connected to the valve core 2, and a support sleeve 10 sleeved on the valve rod 9. The support sleeve 10 has a stepped structure on the outside thereof, which is located at the upper portion of the support sleeve 10, and the stepped structure is connected to the valve cartridge 2 through a bellows 11. The valve seat pressing sleeve 6 is in a straight cylinder shape, is arranged in the valve cavity 3 in a manner of clinging to the inner wall of the valve cavity 3 and is pressed against the valve seat 5, the supporting sleeve 10 is arranged in the valve cavity 3 and is pressed against the valve seat pressing sleeve 6 through a step structure at the upper part of the supporting sleeve, the valve cover 7 is fixed on the valve body 1 through a valve cover nut and a bolt and seals an opening of the valve cavity 3, and meanwhile, the valve cover 7 is also pressed against the supporting sleeve 10. With the above arrangement, the valve seat 5, the valve seat pressing sleeve 6 and the support sleeve 10 are all fixed in the valve chamber 3.

As shown in fig. 5, a plurality of flow windows 61 are formed in the lower portion of the valve seat pressure sleeve 6, and the flow windows 61 are uniformly arranged along the circumferential direction of the valve seat pressure sleeve 6, so that the medium flows between the medium flow passage 4 and the valve chamber 3 through the flow windows 61.

With continued reference to fig. 4, the support sleeve 10 has a hexagonal hole, the hexagonal hole is disposed at the upper portion of the inner side of the support sleeve 10, the valve rod 9 has a hexagonal structure corresponding to the hexagonal hole, and the hexagonal structure on the valve rod 9 and the hexagonal hole of the inner side of the support sleeve 10 form an anti-rotation pair, so that the valve rod 9 is ensured not to rotate relative to the support sleeve 10, and the bellows 11 can be prevented from being damaged. A guide sleeve 12 for guiding the valve rod 9 is arranged in the support sleeve 10, and the guide sleeve 12 provides a stable guiding function for the valve rod 9. In addition, a breathing hole 101 is arranged on the supporting sleeve 10, and the breathing hole 101 ensures that the valve rod 9 moves more smoothly.

It should be noted that, as shown in fig. 6, the valve seat 5 is disposed in the valve cavity 3, and a valve seat gasket 17 is disposed at a position where the valve seat 5 contacts the valve cavity 3 to seal the valve seat 5 with the valve body 1 after being fixed. The valve cover 7 is fixed on the valve body 1, and a valve cover sealing gasket 18 is respectively arranged between the valve cover 7 and the supporting sleeve 10 and between the supporting sleeve 10 and the valve body 1 so as to realize the sealing between the valve cover 7 and the valve body 1.

In the present embodiment, the valve rod 9 penetrates the bonnet 7, and the bonnet 7 is provided with a packing culvert that is in sealing engagement with the valve rod 9. With continued reference to fig. 6, a packing gasket 13, a packing 14 and a packing gland 15 are sequentially arranged in the packing culvert from bottom to top, the packing gasket 13, the packing 14 and the packing gland 15 are fixed in the packing culvert through a packing press plate 16, and the packing press plate 16 is fixed on the valve cover 7 through a press plate nut and a bolt. The packing gasket 13 is a sealing gasket, and the packing 14 is a special packing for a valve in the prior art and can realize sealing with the valve rod 9 when the valve rod moves.

In the present embodiment, the valve rod 9 is driven to move by a pneumatic actuator 8, and the pneumatic actuator 8 is mounted on the valve cover 7. The pneumatic actuator 8 is a pneumatic actuator used for installing a pneumatic valve in the prior art, the output end of the pneumatic actuator 8 is connected with the valve rod 5, the air supply pressure is changed through the pneumatic actuator 8, the valve rod 9 is driven to move up and down relative to the valve body 1, the contact distance between the valve core 2 and the valve seat 5 is changed, the sealing degree between the valve core 2 and the valve seat 5 is changed, and the purpose of adjusting the flow and the pressure is achieved.

In the above embodiment, through the axis angle that sets up valve pocket 3 and medium runner 4, make the structure compacter, and can reduce the flow resistance of medium runner 4, through set up backward flow conical surface 31 in valve pocket 3, no matter be connected with horizontal pipeline or with vertical pipe connection like this, can both make the medium flow back fast, and be difficult for persisting in valve pocket 3, reduce the risk of damage, bilateral symmetry sets up sealed face 51 with case 2 seal fit about disk seat 5, it is more convenient to maintain when sealed problem appears in disk seat 5, and save the cost.

Claims

1. A pneumatic Y-type regulating valve for hot melt salt is characterized by comprising: a valve body and a valve core; a vertical valve cavity and a medium flow passage are arranged in the valve body; the medium flow passage comprises a medium inflow passage and a medium outflow passage; the medium inflow channel and the medium outflow channel are respectively arranged at two sides of the valve cavity and are respectively communicated with the valve cavity; the axial line of the medium inflow channel and the axial line of the medium outflow channel respectively form different set included angles with the axial line of the valve cavity; a valve seat matched with the valve core is arranged in the valve cavity, sealing surfaces are symmetrically arranged on the upper side and the lower side of the inner ring of the circular ring of the valve seat, and the valve core is arranged in the valve cavity and can be in sealing fit with any one sealing surface of the valve seat; and a backflow conical surface with a set conical surface angle is also arranged above the valve seat in the valve cavity.

2. The pneumatic Y-type regulating valve for hot molten salt according to claim 1, further comprising a valve seat pressing sleeve, a valve cover and a valve rod mechanism;

the valve rod mechanism comprises a valve rod connected with the valve core and a support sleeve sleeved on the valve rod; the outer side of the support sleeve is provided with a step structure, and the step structure is connected with the valve core through a corrugated pipe; the valve seat pressing sleeve is positioned in the valve cavity and abuts against the valve seat, the supporting sleeve is positioned in the valve cavity and abuts against the valve seat pressing sleeve, the valve cover is fixed on the valve body and seals an opening of the valve cavity, and the valve cover abuts against the supporting sleeve.

3. The pneumatic Y-type hot melt salt regulator valve as claimed in claim 2, wherein said support sleeve has a hexagonal hole, and said valve stem has a hexagonal structure corresponding to said hexagonal hole; and a guide sleeve for guiding the valve rod is arranged in the support sleeve.

4. The pneumatic Y-type hot melt salt regulator valve as claimed in claim 3, wherein said valve cover has a filler culvert sealingly engaged with said valve stem.

5. The pneumatic Y-type adjustment valve for hot melt salt as claimed in claim 1, wherein the predetermined angle is between 45 ° and 50 °.

6. The pneumatic Y-type hot melt salt regulator as claimed in claim 2, wherein the predetermined taper angle is between 60 ° and 90 °.