CN210397739U - Open-flow Y-shaped stop valve for photothermal power generation fused salt - Google Patents

Abstract

An open-flow Y-type stop valve for photothermal heating molten salt comprises: a valve body and a valve rod; the valve body comprises a middle cavity and a medium flow passage; the valve stem is disposed within the central cavity; the bottom end of the valve rod is connected with a valve rod head and a valve rod head ring, and the valve rod head ring are provided with first conical surfaces; the middle cavity is provided with a valve seat ring, and the valve seat ring is provided with a second conical surface; the valve comprises a valve body and is characterized in that a valve cover is arranged at the top end of the valve body, a guide sleeve is arranged in the valve cover, an outer conical surface is arranged at the bottom end of the valve cover, and an inner conical surface is arranged on the valve rod. In the utility model, the medium can receive smaller flow resistance in the circulation process of the medium in the stop valve through the arranged medium flow channel; the purpose of complete sealing can be achieved through the arranged first conical surface and the second conical surface, and the leakage of a medium during sealing is prevented; through the arranged outer conical surface and the inner conical surface, the temporary sealing effect can be achieved when the corrugated pipe is damaged, and leakage of media is prevented.

Description

Open-flow Y-shaped stop valve for photothermal power generation fused salt

The technical field is as follows:

the utility model relates to a stop valve technical field, in particular to optothermal electricity generation electric heat is open-flow type Y type stop valve for fused 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 molten salt pipeline is often controlled by a high-temperature-resistant and corrosion-resistant molten salt valve; because the molten salt becomes viscous, the fluidity 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 valve can be met only by selecting the valve type with low flow resistance and good fluidity. The existing stop valve and butterfly valve are the preferred forms of the cut-off type molten salt valve. In high-temperature and high-pressure fused salt pipelines, because high-temperature fused salt has extremely strong oxidizability, special non-carbon high-temperature-resistant and strong-oxidation-resistant fused salt fillers are generally required to be used, the fillers basically depend on import, and in order to ensure that a medium does not leak, a dual sealing mode of bellows sealing and filler sealing is generally adopted. However, because the valve rod of the butterfly valve cannot adopt bellows seal, the risk of medium leakage through the packing exists, therefore, the stop valve with the bellows seal becomes the preferred valve type, and particularly, the bellows seal type Y-shaped stop valve is more suitable for the preferred cutting-off of high-temperature and high-pressure molten salt medium. The domestic valve manufacturer is relatively lack of molten salt valve application performance to Y type stop valves for other trades generally have the defects of complicated structure, easy abrasion of a sealing surface, easy internal leakage and external leakage of the valve, difficult maintenance and the like.

The utility model has the following contents:

in view of this, it is necessary to design an open flow type Y-shaped stop valve for photothermal heating molten salt, which simplifies the structure of the Y-shaped stop valve, makes the sealing surface less prone to wear, and prevents leakage of the valve when used.

The utility model provides a photothermal power electricity is open-flow type Y type stop valve for fused salt which characterized in that includes: a valve body and a valve rod; the valve body comprises a vertical middle cavity and an inclined medium flow passage, a flow passage throat part is formed at the intersection position of the middle cavity and the medium flow passage, and a set part of the valve rod is arranged in the middle cavity;

the valve rod is fixedly connected with a valve rod head matched and sealed with the throat part of the flow channel, the valve rod head is provided with a valve rod head ring, and the valve rod head ring is provided with a first conical surface;

a valve seat ring is arranged at the throat part of the flow passage, and a second conical surface matched with the first conical surface is arranged on the valve seat ring;

the top of valve body is provided with the suit and is in the valve gap of valve rod, the valve gap has and inserts the extension of well intracavity, just the extension is for being used for right the guide sleeve that the valve rod leads, the bottom of guide sleeve sets up the external cone face, the valve rod correspond be provided with the internal cone face matched with of external cone face.

Preferably, an inner hexagonal through hole matched with the valve rod is formed in the center of the valve cover, and the cross section of the part, penetrating through the inner hexagonal through hole, of the valve rod is hexagonal matched with the inner hexagonal through hole.

Preferably, the upper end of the valve cover is provided with a packing hole, and a valve rod sealing element is arranged in the packing hole; the valve stem seal includes a packing gasket disposed within the packing bore, a dedicated packing disposed above the packing gasket, a packing gland disposed above the dedicated packing, and a packing press plate disposed above the packing gland.

Preferably, a corrugated pipe is sleeved on the part, located in the valve body, of the valve rod; the bottom of bellows with the valve rod is connected, the top of bellows with the valve gap is connected.

Preferably, the device further comprises a driving device; the driving device comprises a support, the support is provided with a mounting hole, a nut is arranged in the mounting hole, and a hand wheel is connected above the nut; and a screw rod matched with the nut is arranged at the top end of the valve rod.

Preferably, the upper end and the lower end of the nut are respectively provided with a thrust bearing, and a nut gland is arranged above the thrust bearing above the nut.

Preferably, a stroke scale is arranged at the top end of the screw rod.

Preferably, the medium flow channel comprises a medium inflow channel and a medium outflow channel which are parallel to each other, and an axis of the medium flow channel and an axis of the middle cavity are arranged at a set included angle.

In the utility model, the medium can receive smaller flow resistance in the circulation process of the medium in the stop valve through the arranged medium flow channel; the purpose of complete sealing can be achieved through the arranged first conical surface and the second conical surface, and the leakage of a medium during sealing is prevented; through the arranged outer conical surface and the inner conical surface, the temporary sealing effect can be achieved when the corrugated pipe is damaged, and leakage of media is prevented.

Description of the drawings:

FIG. 1 is a schematic structural view of an open-flow Y-type stop valve for photothermal heating molten salt of the present invention;

FIG. 2 is a schematic structural view of a valve body of the open-flow Y-shaped stop valve for photothermal heating molten salt of the utility model;

FIG. 3 is a schematic structural view of a valve seat ring of the open-flow Y-type stop valve for photothermal heating molten salt of the present invention;

fig. 4 is a schematic structural diagram of a valve rod of the open-flow type Y-shaped stop valve for photothermal heating molten salt of the present invention.

Reference numerals:

valve body-1 valve rod-2 middle cavity-3 medium inflow channel-4 medium outflow channel-5 flow channel throat-6 valve rod head-7 valve rod head ring-8 first conical surface-9 valve seat ring-10 second conical surface-11 valve cover-12 guide sleeve-13 external conical surface-14 internal conical surface-15 internal hexagonal through hole-16 packing gasket-17 special packing-18 packing gland-19 packing press plate-20 corrugated pipe-21 support-22 nut-23 handwheel-24 screw rod-25 thrust bearing-26 screw gland-27 stroke scale-28

The specific implementation mode is as follows:

referring to fig. 1, fig. 1 is a schematic structural diagram of an open-flow Y-type stop valve for photothermal heating molten salt according to the present invention. As shown in fig. 1, the present application comprises a valve body 1 and a valve stem 2, wherein the valve body 1 is used for medium circulation and the valve stem 2 is used for closing the valve body 1 when medium circulation is not required.

When specifically setting up above-mentioned valve body 1, can refer to fig. 2, and fig. 2 is the structure sketch map of the utility model discloses photothermal power is open flow formula Y type stop valve's for fused salt valve body. As shown in fig. 2, a vertical middle chamber 3 is arranged in the valve body 1, and a medium flow passage, specifically, a medium inflow passage 4 and a medium outflow passage 5, which are parallel to each other, is also arranged in the valve body 1. Wherein, the medium inflow channel 4 and the medium outflow channel 5 are both obliquely arranged, the medium inflow channel 4 and the medium outflow channel 5 are both intersected with the middle cavity 3, and a flow passage throat part 6 is formed at the intersected position. When the medium flows through, the medium enters the valve body 1 through the medium inflow channel 4 and enters the medium outflow channel 5 through the flow channel throat 6, and the medium flows out of the valve body 1 from the medium outflow channel 5. When the middle cavity 3 and the medium flow channel are specifically arranged, the included angle between the axis of the middle cavity 3 and the axis of the medium flow channel is set to be 45-50 degrees, and the medium inflow channel 4 and the medium outflow channel 5 are parallel to each other, so that the flow resistance is extremely small when the medium flows, and the smooth flowing of the medium is ensured; meanwhile, the transition position between the middle cavity 3 and the flow channel throat part 6 is set to be a conical surface between 60 degrees and 90 degrees, and the conical surface can ensure that no medium is left when flowing through the flow channel throat part 6 and ensure the smoothness of medium flowing.

When not needing the medium to circulate in valve body 1, accessible valve rod 2 is sealed with 6 departments of runner throat to block that the medium flows in valve body 1, valve rod 2 can refer to figure 4 when sealed runner throat 6, and figure 4 is the utility model discloses photothermal heating fused salt is with the schematic structure of valve rod of open flow formula Y type stop valve. As shown in fig. 4, a valve rod head 7 is fixedly connected to the bottom end of the valve rod 2, a valve rod head ring 8 is fixedly connected to the valve rod head 7, a first conical surface 9 is arranged on the valve rod head 7 and the valve rod head ring 8, and a valve seat ring 10 mutually matched with the valve rod head ring 8 is fixedly connected to the flow passage throat portion 6. When specifically setting up valve seat ring 10, refer to fig. 3, and fig. 3 is a schematic structural diagram of the valve seat ring of open-flow Y-type stop valve for photothermal heating molten salt according to the present invention. As shown in fig. 3, a valve seat ring 10 is fixedly connected to the throat portion 6 of the flow path, and the valve seat ring 10 is provided with a second conical surface 11 which is matched with the first conical surface 9. When the medium needs to be blocked, the valve rod head ring 8 is in contact with the valve seat ring 10, at the moment, the first conical surface 9 and the second conical surface 11 are attached, and no gap exists between the first conical surface and the second conical surface, so that the purposes of closing the flow passage throat 6 and blocking the medium from flowing are achieved. The valve rod head 7 is connected with the valve rod 2 through the valve core connecting ring, a gap is arranged between the valve rod head 7 and the valve rod 2 to ensure that the valve rod head 7 can move slightly, the connection mode between the valve seat ring 10 and the valve body 1 can be fixedly connected together in a welding mode, and the first conical surface 9 and the second conical surface 11 are arranged between 15 degrees and 30 degrees when being specifically arranged; valve rod head ring 8 and valve seat ring 10 can be made by the carbide in the current material, and sets up 4 ~ 5 HRC's hardness difference between valve rod head ring 8 and the valve seat ring 10 to can prevent that scouring of medium from causing wearing and tearing to valve rod head ring 8 and valve seat ring 10, and lead to the leakage of this application stop valve, improved the life-span of this application stop valve simultaneously, thereby reduced the maintenance cost.

In order to achieve the above-mentioned fit between the stem head ring 8 and the valve seat ring 10, the stem head 7 must be driven by the stem 2 to move downward, so as to drive the stem head ring 8 to move downward until the stem head ring 8 and the valve seat ring 10 are fitted. Wherein the valve stem 2, when moved, can be continued with reference to fig. 1. As shown in fig. 1, a bonnet 12 is fixedly connected to the top end of the valve body 1, an internal hexagonal through hole 16 for passing through the valve stem 2 is opened at the center position of the valve stem 12, and since the bonnet 12 is disposed at the top end of the valve body 1 and a part of the valve stem 12 is in the middle cavity 3 of the valve body 1, the valve stem 2 must penetrate through the bonnet 12. Specifically, when the valve rod 2 penetrates through the valve cover 12, the valve rod 2 can penetrate through the inner hexagonal through hole 16, and meanwhile, in order to prevent the valve rod 2 from rotating in the inner hexagonal through hole 16, the cross section of the part, located in the middle cavity 3, of the valve rod 2 can be set to be hexagonal matched with the inner hexagonal through hole 16.

Simultaneously for making valve rod 2 more stable when removing in lumen 3, can prolong the bottom of valve gap 12 downwards to at the internal fixed uide bushing 13 that sets up of extension, valve rod 2 can pass the uide bushing, can reach the purpose to valve rod 2 direction when valve rod 2 reciprocates through extension and the uide bushing 13 that sets up, prevents that valve rod 2 from removing the in-process off tracking. Meanwhile, the corrugated pipe 21 is arranged on the outer side of the extension part, the top end of the corrugated pipe 21 is fixedly connected with the valve cover 12, the bottom end of the corrugated pipe 21 is fixedly connected with the valve rod 2, and the medium can be prevented from leaking out of the inner hexagonal through hole 16 through the arranged corrugated pipe 21. Meanwhile, the outer edge of the bottom end of the extension part of the valve cover 12 is provided with an outer conical surface 14, the corresponding part of the valve rod 2 is provided with an inner conical surface 15, and the valve can be opened to achieve the purpose of temporary sealing when the corrugated pipe 21 is damaged through the mutual matching of the outer conical surface 14 and the inner conical surface 15, so that the medium is prevented from being exposed.

In order to further enhance the sealing performance of the valve cover 12, the valve cover 12 and the valve body 1 are sealed by metal-to-metal conical surfaces. Specifically, the valve cover 12 is provided with an inverted U-shaped groove corresponding to the sealing portion of the valve body 1, and the sealing portion of the valve body 1 corresponding to the valve cover 12 is welded with a hard alloy matched with the inverted U-shaped groove, and the outer edge of the inverted U-shaped groove is a conical surface. Through the mutual cooperation of the inverted U-shaped groove and the hard alloy, the valve cover 12 is connected with the valve body 1, when a medium is exposed from the joint of the valve cover 12 and the valve body 1, the medium pressure can enable the outer edge of the inverted U-shaped groove to generate outward tension, the tension is enough to make up the defect of pre-tightening force caused by stress relaxation, and therefore a good sealing effect is achieved, and the medium is prevented from being exposed.

In order to further enhance the connectivity between the bonnet 12 and the valve body 1, a flange step may be provided at an upper end of the bonnet 12, and the flange step and the valve body 1 may be fixedly connected together by the mutual cooperation of a bolt and a nut, thereby further enhancing the connectivity between the bonnet 12 and the valve body 1.

The center position of the upper end of the valve cover 12 is provided with a packing hole, a packing gasket 17, a special packing 18, a packing gland 19 and a packing pressure plate 20 are sequentially arranged in the packing hole from bottom to top, the valve rod 2 sequentially penetrates through the components, the valve rod 2 can be sealed in a movement mode through the arranged components, and the medium exposure phenomenon can be further prevented. Meanwhile, in order to fix the above components, the packing press plate 20 and the bonnet 12 may be fixedly connected together by the mutual cooperation of the bolt and the nut, thereby achieving the purpose of fixing the packing gasket 17, the special packing 18, the packing gland 19, and the packing press plate 20.

The upper surface of the flange step of the valve cover 12 is fixedly connected with a support 22, the top end of the support 22 is provided with a mounting hole, a nut 23 is arranged in the mounting hole, the nut 23 is fixedly connected with a hand wheel 24, and the top end of the valve rod 2 is fixedly connected with a screw rod 25 matched with the nut 23. The stop valve is opened and closed through the reciprocating result of valve rod 2, through the rotation of hand wheel 24 to can drive screw 23 and rotate, because valve rod 2 can't rotate, so lead screw 25 also can't rotate, so the rotation of screw 23 can make lead screw 25 reciprocate, thereby makes valve rod 2 reciprocate, thereby reaches the purpose of opening or closing the stop valve. In order to make the nut 23 rotate more smoothly in the mounting hole, thrust bearings 26 may be respectively provided on upper and lower sides of the nut 23, and the two thrust bearings 26 and the nut 23 may be fixed in the mounting hole by a nut pressing cover 27. In order to fix the nut pressing cover 27, the nut pressing cover 27 and the bracket 22 may be fixedly connected together by screws.

For more convenient current state of definite stop valve, can be at lead screw 25's top fixedly connected with stroke scale 28, through reading the scale of the exposure hand wheel 24 of stroke scale 28 to can be more accurate audio-visual judgement this application stop valve current state.

In the embodiment, the medium flow channel is arranged, so that the medium can be subjected to smaller flow resistance in the circulation process of the stop valve; the purpose of complete sealing can be achieved through the arranged first conical surface and the second conical surface, and the leakage of a medium during sealing is prevented; through the arranged outer conical surface and the inner conical surface, the temporary sealing effect can be achieved when the corrugated pipe is damaged, and leakage of media is prevented.

Claims (8)

1. The utility model provides a photothermal power electricity is open-flow type Y type stop valve for fused salt which characterized in that includes: a valve body and a valve rod;

the valve body comprises a vertical middle cavity and an inclined medium flow passage, a flow passage throat part is formed at the intersection position of the middle cavity and the medium flow passage, and a set part of the valve rod is arranged in the middle cavity;

the valve rod is fixedly connected with a valve rod head matched and sealed with the throat part of the flow channel, the valve rod head is provided with a valve rod head ring, and the valve rod head ring is provided with a first conical surface;

a valve seat ring is arranged at the throat part of the flow passage, and a second conical surface matched with the first conical surface is arranged on the valve seat ring;

the top of valve body is provided with the suit and is in the valve gap of valve rod, the valve gap has and inserts the extension of well intracavity, just the extension is for being used for right the guide sleeve that the valve rod leads, the bottom of guide sleeve sets up the external cone face, the valve rod correspond be provided with the internal cone face matched with of external cone face.

2. The open-flow Y-type stop valve for photothermal heating molten salt according to claim 1, wherein an inner hexagonal through hole matched with the valve rod is formed in the center of the valve cover, and the cross section of a portion, penetrating through the inner hexagonal through hole, of the valve rod is hexagonal matched with the inner hexagonal through hole.

3. The open-flow Y-type stop valve for photothermal heating molten salt according to claim 1, wherein a packing hole is formed in the upper end of the valve cover, and a valve rod sealing member is arranged in the packing hole; the valve stem seal includes a packing gasket disposed within the packing bore, a dedicated packing disposed above the packing gasket, a packing gland disposed above the dedicated packing, and a packing press plate disposed above the packing gland.

4. The open-flow Y-type stop valve for photothermal heating molten salt according to claim 1, wherein a bellows is sleeved on a portion of the valve rod located in the valve body; the bottom of bellows with the valve rod is connected, the top of bellows with the valve gap is connected.

5. The open-flow Y-type stop valve for photothermal heating molten salt according to claim 1, further comprising a driving device; the driving device comprises a support, the support is provided with a mounting hole, a nut is arranged in the mounting hole, and a hand wheel is connected above the nut; and a screw rod matched with the nut is arranged at the top end of the valve rod.

6. The open-flow Y-type stop valve for photothermal heating molten salt according to claim 5, wherein thrust bearings are respectively disposed at upper and lower ends of the nut, and a nut gland is disposed above the thrust bearing above the nut.

7. The open-flow Y-type stop valve for photothermal heating molten salt according to claim 5, wherein a stroke scale is provided at the top end of the lead screw.

8. The open-flow Y-type stop valve for photothermal heating molten salt according to claim 1, wherein the medium flow channel comprises a medium inflow channel and a medium outflow channel which are parallel to each other, and an axis of the medium flow channel and an axis of the middle cavity are arranged at a set included angle.

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