CN117869607A - Molten salt loading valve and molten salt conveying device comprising same - Google Patents

Abstract

The invention discloses a molten salt loading valve and a molten salt conveying device comprising the same, wherein the molten salt loading valve comprises a valve body, and a first channel for fluid to pass through is formed in the valve body; a second channel for inserting a butt joint piece is formed on one side, opposite to the first channel, of the valve body, and the butt joint piece is arranged to be communicated with the first channel in the inner cavity of the valve body in a sealing way; the surface of the valve body is provided with a first opening and a second opening, the first opening is communicated with the second opening and the inner cavity of the valve body, the first opening is communicated with an air inlet pipe in a sealing way, the second opening is communicated with an air outlet pipe in a sealing way, a gas loop is formed among the air inlet pipe, the air outlet pipe and the inner cavity of the valve body, and the air outlet pipe is communicated with a pressure monitoring device. The fused salt loading valve can monitor the pressure of the inner cavity of the valve body on line and monitor whether the inner cavity of the valve body leaks or not in real time. This fused salt loading valve can also prevent that the temperature of valve body from being too high through letting in gas to the valve body in to sweep the inner chamber of valve body, leads to the intensity of valve body to reduce.

Description

Molten salt loading valve and molten salt conveying device comprising same

Technical Field

The invention relates to a molten salt loading valve and a molten salt conveying device comprising the same.

Background

In the fields of energy storage, nuclear energy, chemical industry and the like, the transfer of high-temperature fluid media in different containers under the action of air pressure is required to be realized, particularly, the mutual transfer between a movable container and a fixed container is realized, the flowing high-temperature fluid media are required to be isolated from air during the period, the connection part of the two containers can be conveniently installed or detached, a certain temperature range is required to be maintained during the transmission of the high-temperature fluid media, and the whole butt joint use process has safety and reliability and can be repeatedly used for a plurality of times.

At present, no effective dynamic butt joint scheme or reliable butt joint valve for butt joint transmission of high-temperature molten salt between a movable container and a fixed container exists. When the existing valve structure is used for transporting molten salt, the molten salt is at risk of contacting air, and further the quality of the molten salt is possibly deteriorated.

Disclosure of Invention

The invention aims to overcome the defect that when the existing valve structure is used for transferring molten salt, the molten salt is in contact with air, so that the quality of the molten salt is possibly deteriorated.

The invention solves the technical problems by the following technical scheme:

the invention provides a molten salt loading valve, which comprises a valve body, wherein a first channel for fluid to pass through is formed in the valve body; the valve body is also provided with a second channel for inserting an external butt joint piece, the first channel is arranged to be communicated with the butt joint piece in a sealing way when the butt joint piece is inserted into the inner cavity of the valve body, and the butt joint part of the first channel and the butt joint piece is positioned in the inner cavity of the valve body;

be equipped with first opening and second opening on the valve body, first opening with the second opening with the inner chamber intercommunication of valve body, sealed intercommunication has the intake pipe on the first opening, sealed intercommunication of second opening has the outlet duct, the intake pipe the outlet duct with form gas circuit between the inner chamber of valve body, the intake pipe and/or the outlet duct is equipped with pressure monitoring device, pressure monitoring device is used for measuring the pressure of the intracavity gas of valve body.

In this scheme, this fused salt loading valve can be through the intake pipe to the inner chamber of valve body charge inert gas, not only can prevent that outside air from getting into the inner chamber contact fused salt of valve body, and then avoid the fused salt to probably contact air and lead to the quality to worsen, can also on-line monitoring valve body inner chamber's pressure, whether the weeping appears in the inner chamber of real-time supervision valve body. This fused salt loading valve can also let in gas to the valve body through the intake pipe and sweep the inner chamber of valve body, prevents that the temperature of valve body from being too high, leads to the intensity of valve body to reduce.

Preferably, the valve body comprises a valve seat, a boss is arranged on one side, opposite to the second channel, of the valve seat, the boss is arranged to be capable of being abutted to the abutting piece, the first channel is arranged in the valve seat, and an opening of the first channel is located on the end face, abutted to the abutting piece, of the boss.

In this scheme, adopt above-mentioned structure, can be convenient for disk seat and butt joint spare dock through setting up the boss, first passageway is established in the disk seat, and the opening of first passageway is located the terminal surface of boss and butt joint spare butt joint. The boss faces the end face of the butt joint piece and is opposite to the end face of the butt joint piece during butt joint, so that end face sealing during butt joint can be achieved, and leakage during molten salt transfer is prevented.

Preferably, the first channel is arranged coaxially with the second channel.

In this scheme, adopt above-mentioned structure, make things convenient for the quick circulation of fused salt.

Preferably, the molten salt loading valve further comprises a valve cover and a valve rod, wherein the valve cover is in sealing connection with the valve body, an inner cavity of the valve cover is communicated with an inner cavity of the valve body, the valve rod is slidably arranged on the valve cover, a flashboard is connected to the end part of the valve rod, and the valve rod can drive the flashboard to move between a first position and a second position;

the abutment is insertable into the second passage and in sealing communication with the first passage when the shutter is in the first position; the shutter closes the first passage when the shutter is in the second position.

Preferably, the valve cover is provided with a mounting hole, the valve rod is slidably mounted in the mounting hole, and a first group of sealing fillers arranged along the outer peripheral surface of the valve rod are arranged in the mounting hole.

In the scheme, the structure can ensure the sealing between the valve rod and the valve cover, and prevent unstable pressure in the valve body and errors in data monitored by the pressure monitoring device caused by gas leakage in the molten salt loading valve, thereby affecting processing production; simultaneously, guarantee the seal between valve rod and the valve gap, can also avoid outside air to get into the inner chamber of valve body, prevent that outside air from getting into the inner chamber contact fused salt of valve body, and then avoid the fused salt to contact the air and lead to the quality to worsen.

Preferably, the valve rod is sleeved with a corrugated pipe, the corrugated pipe is located on one side, close to the flashboard, of the valve cover, one end of the corrugated pipe surrounds the mounting hole and is in sealing connection with the valve cover, and the other end of the corrugated pipe is far away from the mounting hole and is in sealing connection with the outer wall surface of the valve rod.

In the scheme, the corrugated pipe is arranged, so that the pressure fluctuation of the inner cavity of the valve body can be reduced, the sealing performance can be enhanced by combining the first group of sealing fillers when the valve rod moves, internal gas is prevented from overflowing outwards, unstable pressure in the valve body is caused, and errors occur in data monitored by the pressure monitoring device, so that the processing production is influenced; simultaneously, the inner cavity of the valve body can be prevented from being accessed by external air, the inner cavity of the valve body is prevented from being contacted with molten salt, and further quality deterioration caused by the fact that the molten salt is possibly contacted with air is avoided.

Preferably, a valve body connecting cylinder is arranged between the valve body and the valve cover, one end of the valve body connecting cylinder is in sealing connection with one end of the valve body, the other end of the valve body connecting cylinder is in sealing connection with the valve cover, and the inner cavity of the valve body, the inner cavity of the valve cover and the inner cavity of the valve body connecting cylinder are communicated and form a sealing cavity.

In this scheme, connect a section of thick bamboo through setting up the valve body and connect the valve body, provide sliding space for the valve rod, can provide an inner chamber simultaneously in order to fill corresponding volumetric gas for the fused salt loading valve to the pressure monitoring of the inside gas of fused salt loading valve of being convenient for.

Preferably, a bracket is connected to the valve cover, one end of the valve rod, which is far away from the flashboard, passes through the bracket and is provided with a hand wheel through a limit mounting piece, the hand wheel is fixed relative to the valve rod, and the limit mounting piece is in matched rotation connection with the bracket;

and the valve rod is also sleeved with a locking nut for locking the limit mounting piece.

In this scheme, through setting up the support for the installation of hand wheel provides the support, and synchronous rotation is between spacing installed part and the valve rod, synchronous rotation is between hand wheel and the valve rod.

The invention also provides a molten salt conveying device which comprises a butt joint part and the molten salt loading valve, wherein the butt joint part is a connecting pipe.

Preferably, the end part of the connecting pipe is connected with a sealing sleeve, a second group of sealing fillers are arranged in the sealing sleeve, and the second group of sealing fillers are arranged on the end surface of the connecting pipe;

the molten salt loading valve further comprises a valve seat, a boss is arranged on one side, opposite to the connecting pipe, of the valve seat, the boss is arranged to be capable of being abutted to the end face of the second group of sealing fillers, the first channel is arranged in the valve seat, and an opening of the first channel is located on the end face, abutted to the second group of sealing fillers, of the boss.

In the scheme, the second group of sealing fillers can realize the sealing between the connecting pipe and the valve seat when the connecting pipe is connected into the inner cavity of the valve body, so that molten salt is prevented from leaking when flowing between the first channel and the connecting pipe.

Preferably, the molten salt conveying device further comprises a valve assembly interface, the valve assembly interface is mounted on the valve body, the connecting pipe penetrates through the valve assembly interface and stretches into the second channel, and a third group of sealing fillers arranged along the outer peripheral surface of the connecting pipe are arranged in the valve assembly interface.

In this scheme, compress tightly the third group of sealing filler in the valve assembly interface to can realize the sealing of connecting pipe and valve assembly interface.

Preferably, the molten salt conveying device further comprises a pressing ring, the pressing ring is sleeved on the connecting pipe, the pressing ring is arranged at one end, far away from the first channel, of the third group of sealing fillers, and the pressing ring is used for pressing the third group of sealing fillers into the valve assembly interface so that the third group of sealing fillers and the outer wall surface of the connecting pipe are in fit sealing in the circumferential direction.

Preferably, the connecting pipe is further fixed with a first fixing piece, the valve assembly connector is fixed with a second fixing piece, and the first fixing piece is fixedly connected with the second fixing piece through a connecting piece.

In the scheme, the first fixing piece is fixed on the second fixing piece through the bolts, so that the fixing of the connecting pipe can be realized.

Preferably, the molten salt conveying device further comprises a first molten salt tank and a second molten salt tank, wherein the first molten salt tank and the second molten salt tank are respectively provided with the molten salt loading valve, and the first molten salt tank and the second molten salt tank are communicated with the first channel of the molten salt loading valve;

the first molten salt tank and the second molten salt tank are respectively inserted into one end of the connecting pipe.

In this scheme, adopt above-mentioned structure, can transport the fused salt from first fused salt jar to in the second fused salt jar, transport efficient and in-process fused salt does not have the risk that the contact air leads to the quality to reduce.

The invention has the positive progress effects that: this fused salt loading valve can charge inert gas to the inner chamber of valve body through the intake pipe, not only can prevent that outside air from getting into the inner chamber contact fused salt of valve body, and then avoid the fused salt to probably contact air and lead to the quality to worsen, can also the pressure of on-line monitoring valve body inner chamber, whether the weeping appears in the inner chamber of real-time supervision valve body. This fused salt loading valve can also let in gas to the valve body through the intake pipe and sweep the inner chamber of valve body, prevents that the temperature of valve body from being too high, leads to the intensity of valve body to reduce.

Drawings

Fig. 1 is a schematic perspective view of a molten salt transporting device of the present invention.

Fig. 2 is a schematic perspective view of a molten salt loading valve of the present invention.

Fig. 3 is a front view of the molten salt transporting device of the present invention.

Fig. 4 is a schematic cross-sectional view of fig. 3 at A-A.

Fig. 5 is an enlarged schematic view at B in fig. 5.

Fig. 6 is a left side view of the molten salt delivery device of the invention.

Fig. 7 is a schematic diagram of a cross-sectional structure at C-C in fig. 6.

Fig. 8 is a schematic diagram of a cross-sectional structure at C-C in fig. 6.

Fig. 9 is an enlarged schematic view at D in fig. 8.

Reference numerals illustrate:

molten salt loading valve 100

Valve body 110

First channel 111

Second channel 112

Inner cavity 113 of valve body

Air inlet pipe 114

Outlet duct 115

Valve cover 120

First group of sealing fillers 121

Support 122

Limiting mounting member 123

Hand wheel 124

Lock nut 125

Valve stem 130

Bellows 131

Flange 132

Valve body socket 140

Flashboard 150

Valve seat 160

Boss 161

Connecting pipe 200

Valve assembly interface 300

Third group of sealing fillers 301

Compression ring 310

Platen 320

Fixing plate 330

Sealing sleeve 340

Second set of sealing fillers 350

First fixing member 360

Second fixing member 370

Detailed Description

The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention.

As shown in fig. 1 to 9, the present embodiment provides a molten salt loading valve 100, the molten salt loading valve 100 including a valve body 110, a first passage 111 for fluid to pass through being provided in the valve body 110. The valve body 110 is also provided with a second passage 112 for insertion of an external abutment, the first passage 111 being arranged to be in sealing communication with the abutment when the abutment is inserted into the internal cavity 113 of the valve body, the abutment of the first passage 111 with the abutment being located in the internal cavity 113 of the valve body.

The valve body 110 is provided with a first opening and a second opening, and the first opening and the second opening are communicated with the inner cavity 113 of the valve body. The first opening is communicated with an air inlet pipe 114 in a sealing way, the second opening is communicated with an air outlet pipe 115 in a sealing way, and a gas loop is formed among the air inlet pipe 114, the air outlet pipe 115 and the inner cavity 113 of the valve body. The air inlet pipe 114 is provided with a pressure monitoring device for measuring the pressure of the air in the inner cavity 113 of the valve body. In some embodiments, a pressure monitoring device may also be provided on the outlet tube 115.

This fused salt loading valve 100 can be through the intake pipe 114 to the inner chamber 113 of valve body fill inert gas, can prevent that outside air from getting into the inner chamber 113 of valve body, and then when avoiding fused salt loading valve 100 to transport the fused salt, makes the fused salt have the risk that the contact air leads to the quality to deteriorate. The molten salt loading valve 100 can also monitor the pressure of the inner cavity 113 of the valve body on line, and monitor whether the inner cavity 113 of the valve body has liquid leakage or not in real time, so that the staff can overhaul and adjust.

The molten salt loading valve 100 can also purge the inner cavity 113 of the valve body by introducing gas into the valve body 110 through the gas inlet pipe 114, so that the overhigh temperature of the valve body 110 is prevented from reducing the strength of the valve body 110.

Specifically, the molten salt loading valve 100 is mounted on a molten salt tank, the air inlet pipe 114 is communicated with a first opening of the molten salt loading valve 100 in a sealing manner, the air outlet pipe 115 is communicated with a second opening of the molten salt loading valve 100 in a sealing manner, and the two molten salt tanks are connected by inserting a butt joint member, and the inner cavity 113 of the valve body of the molten salt loading valve 100 is in a sealed state. Introducing a preset pressure (200 kpa or more) for 30min to perform pressure maintaining test, if no pressure drop exists, indicating that the butt joint is qualified, and the inner cavity 113 of the valve body of the molten salt loading valve 100 is in a closed state; if a pressure drop occurs, the butt joint (connecting pipe connecting the two molten salt tanks) is re-engaged, and then it is checked whether the inner cavity 113 of the valve body of the molten salt loading valve 100 is in a closed state to ensure that the butt joint is qualified.

In operation, the early operation of the molten salt loading valve 100 is accompanied by an increase in temperature, and accordingly, the pressure in the inner cavity 113 of the valve body of the molten salt loading valve 100 is unstable, and the data monitored by the pressure monitoring device is unstable. After the operation of the molten salt loading valve 100 tends to be stable, the temperature and the pressure in the molten salt loading valve 100 are stable, and at this time, whether the molten salt leaks from the joint of the first channel 111 and the butt piece in the molten salt loading valve 100 can be judged according to whether the pressure monitored by the pressure monitoring device changes. Specifically, if a liquid leakage occurs, the temperature of the inner cavity 113 of the valve body of the molten salt loading valve 100 increases, and accordingly, the pressure monitored by the pressure monitoring device increases to prompt a worker to repair the molten salt loading valve 100.

The valve body 110 further includes a valve seat 160, and a boss 161 is provided on a side of the valve seat 160 opposite to the second passage 112, the boss 161 being provided so as to be capable of abutting against the abutment. The valve seat 160 and the butt joint piece can be conveniently in butt joint through the arrangement of the boss 161, the first channel 111 is arranged in the valve seat 160, and the opening of the first channel 111 is positioned on the end face of the boss 161, which is in butt joint with the butt joint piece. The end face of the boss 161 facing the butt joint piece is opposite to the end face of the butt joint piece during butt joint, so that end face sealing during butt joint can be realized, and leakage during molten salt transfer is prevented.

In the present embodiment, the valve seat 160 is provided separately from the valve body 110, and the boss 161 on the valve seat 160 can be easily machined. Specifically, after the boss 161 is machined, the valve seat 160 is placed at a specific position in the valve body 110, and the valve seat are connected in a sealing manner, so that the molten salt loading valve 100 is convenient to machine and install.

In other embodiments, the valve seat 160 and the valve body 110 may be integrally formed.

In this embodiment, the first channel 111 and the second channel 112 are coaxially arranged, so that rapid circulation of molten salt is facilitated.

In some embodiments, to meet a specific installation environment, the first channel 111 and the second channel 112 may be set to an installation form with a certain included angle, so long as the condition of sealing and docking can be met.

In this embodiment, the molten salt loading valve 100 further includes a valve cap 120 and a valve stem 130, the valve cap 120 is sealingly connected to the valve body 110, the interior cavity of the valve cap 120 is in communication with the interior cavity 113 of the valve body, and the valve stem 130 is slidably mounted on the valve cap 120. The valve cap 120 is in sealing connection with the valve body 110, and the inner cavity of the valve cap 120 is communicated with the inner cavity 113 of the valve body.

The end of the valve rod 130 is connected with a gate 150, and the valve rod 130 can drive the gate 150 to move between a first position and a second position. The shutter 150 may be wedge-shaped, or may have other shapes that facilitate the blocking of the first passage 111. As shown in fig. 7, when the shutter 150 is in the first position, the abutment can be inserted into the second passage 112 and can be in sealing communication with the first passage 111 such that molten salt can flow between the abutment and the first passage 111 of the valve body 110. As shown in fig. 8, when the shutter 150 is in the second position, the shutter 150 is driven by the valve rod 130 to insert into the inner cavity 113 of the valve body, so as to close the first channel 111, and prevent external air from entering the first channel 111 to contact with internal molten salt, so that the quality of the molten salt entering the molten salt tank is affected; the shutter 150 closes the first passage 111, and the abutting part can be removed from the molten salt loading valve 100, whereby parts (for example, an intake pipe and an abutting part) of the molten salt loading valve 100 can be replaced, overhauled, and the like.

The valve cap 120 is provided with a mounting hole, the valve rod 130 is slidably mounted in the mounting hole, and a first group of sealing fillers 121 arranged along the outer peripheral surface of the valve rod 130 are arranged in the mounting hole. Specifically, the valve cover 120 is sleeved with the limiting mounting piece 123 to lock the first group of sealing fillers 121, so that sealing between the valve rod 130 and the valve cover 120 can be ensured when the valve rod 130 moves, and the situation that the pressure in the valve body 110 is unstable and data monitored by the pressure monitoring device are wrong due to gas leakage in the molten salt loading valve 100, so that the molten salt loading valve 100 needs to be overhauled again to further influence the processing production is prevented; simultaneously, guarantee the seal between valve rod 130 and the valve gap 120, can also avoid outside air to get into the inner chamber 113 of valve body, prevent outside air to get into the inner chamber 113 contact fused salt of valve body, and then avoid the fused salt to contact the air probably and lead to the quality to worsen.

In this embodiment, the valve rod 130 is sleeved with the bellows 131, the bellows 131 is located on one side of the valve cover 120 close to the flashboard 150, one end of the bellows 131 surrounds the mounting hole and is in sealing connection with the valve cover 120, and the other end of the bellows 131 is far away from the mounting hole and is in sealing connection with the outer wall surface of the valve rod 130. By arranging the bellows 131, the pressure fluctuation of the inner cavity 113 of the valve body can be reduced, the tightness can be enhanced by combining the first group of sealing fillers 121 when the valve rod 130 moves, internal gas is prevented from overflowing outwards, unstable pressure in the valve body 110 is caused, errors occur in data monitored by the pressure monitoring device, and the molten salt loading valve 100 needs to be overhauled again, so that the processing production is influenced; and meanwhile, the condition that external air enters the inner cavity 113 of the valve body and the external air enters the inner cavity 113 of the valve body to contact molten salt so as to cause the quality deterioration of the molten salt can be avoided. Specifically, as shown in fig. 9, one end of the bellows 131 is connected to the surface of the flange 132 in a sealing manner, the flange 132 is sleeved on the valve rod 130 and is disposed in the inner cavity of the valve body receiving cylinder 140, and the end surface of the flange 132 is connected to the inner wall surface of the valve cover 120 in a sealing manner. In some embodiments, the secondary seal may be performed without a bellows if the seal between the valve stem and the valve cover is good.

An electric heater and a thermal insulation module are provided on the valve body 110 of the molten salt loading valve 100 to maintain the heat required for molten salt transportation. Specifically, an electric heater can be disposed around the valve body 110 and surround the outer circumference of the connection pipe 200.

In this embodiment, as shown in fig. 2 to 3, a valve body connecting tube 140 is disposed between the valve body 110 and the valve cover 120, one end of the valve body connecting tube 140 is connected with one end of the valve body 110 in a sealing manner, the other end of the valve body connecting tube 140 is connected with the valve cover 120 in a sealing manner, and the inner cavity 113 of the valve body, the inner cavity of the valve cover 120 and the valve body connecting tube 140 are communicated to form a sealing chamber. By providing the valve body socket 140 to connect the valve body 110, a sliding space is provided for the valve stem 130, and an inner cavity can be provided for the molten salt loading valve 100 to fill the corresponding volume of gas, thereby facilitating the pressure monitoring of the gas inside the molten salt loading valve 100. When heated, the temperature of the inner wall of the molten salt loading valve 100 is 50 to 150 ℃ higher than the melting point of the molten salt to be melted. Because the valve body 110 needs to be heated to high temperature to realize molten salt circulation, the valve body connecting barrel 140 needs to be lengthened to realize control of different temperature gradients, so that the temperature is in the working temperature range of the first group of sealing fillers 121, and the sealing failure of the first group of sealing fillers 121 is avoided, thereby avoiding air leakage of the molten salt loading valve 100 from between the valve rod 130 and the valve cover 120.

The valve cover 120 is connected with a bracket 122, and one end of the valve rod 130, which is far away from the flashboard 150, passes through the bracket 122 and is provided with a hand wheel 124 through a limiting mounting piece 123. The hand wheel 124 is fixed relative to the valve stem 130, and the limiting mounting member 123 is in rotational connection with the bracket 122. The valve rod is also sleeved with a lock nut 125 for locking the limit mounting member 123. The operation hand wheel 124 needs to be arranged outside the heat preservation module and the heating module, i.e. heating and heat preservation of the operation hand wheel 124 are not needed. By providing support for the mounting of the handwheel 124 by the bracket 122, the rotation between the limit mounting member 123 and the valve rod 130 is synchronized, and the rotation between the handwheel 124 and the valve rod 130 is synchronized. In this embodiment, rotating the handwheel 124 rotates the valve stem 130, which moves the shutter 150 between the first and second positions. Specifically, rotating the hand wheel 124 clockwise moves the shutter 150 in the direction of the valve body 110 until the valve shutter 150 closes the first passage 111. Rotating the handwheel 124 counter-clockwise moves the shutter 150 away from the valve body 110 until the first passage 111 is fully opened, and the abutment can be in sealing communication with the first passage.

The present embodiment also provides a molten salt conveying apparatus comprising a butt joint member, which is a connection pipe 200, and the molten salt loading valve 100 as described above. Specifically, as shown in fig. 1, the connection pipe 200 has a U-shaped structure. In other embodiments, the connection tube 200 may also be a tube of other shapes.

The end of the connection pipe 200 is connected with a sealing sleeve 340, a second group of sealing fillers 350 is arranged in the sealing sleeve 340, and the second group of sealing fillers 350 is arranged on the end face of the connection pipe 200. As shown in fig. 5, the molten salt loading valve 100 further includes a valve seat 160, a boss 161 is provided on a side of the valve seat 160 opposite to the connection pipe 200, the boss 161 is provided so as to be able to abut against an end face of the second group of seal packing 350, the first passage 111 is provided in the valve seat 160, and an opening of the first passage 111 is located at an end face of the boss 161 abutting against the second group of seal packing 350. The second set of packing 350 is capable of sealing between the connecting tube 200 and the valve seat 160 when the connecting tube 200 is inserted into the inner cavity 113 of the valve body, preventing leakage of molten salt when flowing between the first passage 111 and the connecting tube 200. In particular, the second set of sealing fillers 350 may be flexible graphite sealing rings.

As shown in fig. 3 to 5, the molten salt delivery device further includes a valve assembly interface 300, the valve assembly interface 300 is mounted on the valve body 110, the connection pipe 200 passes through the valve assembly interface 300 and extends into the second channel 112, and a third group of sealing fillers 301 disposed along the outer circumferential surface of the connection pipe 200 is disposed in the valve assembly interface 300. The third group of sealing fillers 301 is arranged around the periphery of the connecting pipe 200, so that sealing between the connecting pipe 200 and the molten salt loading valve 100 can be realized, external air is prevented from entering the inner cavity 113 of the valve body of the molten salt loading valve 100 from between the end part of the connecting pipe 200 and the valve body assembly interface 300, and further quality degradation caused by molten salt contact air is prevented.

An upper scale mark and a lower scale mark can be arranged on the outer surface of the connecting pipe 200 and used for marking two positions of the connecting pipe 200 in place and the valve body 110 to be pulled out, thereby being convenient for the installation of workers and improving the installation efficiency.

As shown in the figure, in this embodiment, the molten salt conveying device further includes a pressing ring 310, the pressing ring 310 is sleeved on the connection pipe 200, the pressing ring 310 is disposed at one end of the third group of sealing fillers 301 away from the first channel 111, and the pressing ring is used for pressing the third group of sealing fillers 301 in the valve assembly interface 300 so that the third group of sealing fillers 301 and the outer wall surface of the connection pipe 200 are attached and sealed in the circumferential direction. Specifically, the connecting pipe 200 is further sleeved with a pressing plate 320, the pressing plate 320 is pressed on the outer surface of the pressing ring 310, the valve assembly interface 300 is sleeved with a fixing plate 330, and the pressing plate 320 is fixed on the fixing plate 330, so that the pressing ring 310 is driven to press the third group of sealing fillers 301 in the valve assembly interface 300, the third group of sealing fillers 301 are prevented from being separated from the valve assembly interface 300, and the sealing grade of the connecting pipe 200 and the valve assembly interface 300 is improved. Specifically, the third set of packing 301 is comprised of multiple sets of graphite packing rings. In other embodiments, the third set of sealing fillers 301 may also be sealed with other sealing materials.

The connecting pipe 200 is further fixed with a first fixing member 360, the valve assembly connector 300 is fixed with a second fixing member 370, and the first fixing member 360 is fixedly connected with the second fixing member 370 through the connecting member. Specifically, the connecting member may be a bolt, and the first fixing member 360 is fixed on the second fixing member 370 through the bolt, so that the fixing of the connecting tube 200 can be achieved, and the connecting tube is prevented from loosening during molten salt conveying. After the bolts are removed when the connecting pipe 200 is required to be disassembled, the first fixing member 360 and the second fixing member 370 are separated, and the connecting pipe 200 can be removed from the molten salt loading valve 100 to separate the connecting pipe 200. In this embodiment, the valve assembly interface 300 and the valve body 110 are sealed and welded, and no leakage occurs at the joint of the valve assembly interface 300 and the valve body 110. Specifically, the first fixing member 360 and the second fixing member 370 may be split-type pressing plates, and the split-type pressing plates are first fixed in grooves formed on the surfaces of the connecting pipe 200 and the valve assembly interface 300 respectively, and after the two split-type pressing plates are fixed respectively, the first fixing member 360 and the second fixing member 370 are fixed to each other.

The molten salt conveying device comprises a first molten salt tank and a second molten salt tank, wherein the first molten salt tank and the second molten salt tank are respectively provided with a molten salt loading valve 100, and the first molten salt tank and the second molten salt tank are communicated with a first channel 111 of the molten salt loading valve 100. The second passages 112 of the first and second molten salt tanks are respectively inserted into one ends of the connection pipe 200. With the adoption of the structure, dynamic online butt joint of the valve in the high-temperature fluid transfer process can be realized, and the molten salt loading valve 100 can be designed integrally with the first molten salt tank and the second molten salt tank. Specifically, argon is introduced into the inner cavity 113 of the valve body of the molten salt loading valve 100, so that the inner cavity 113 of the valve body of the molten salt loading valve 100 is in a full argon atmosphere, and external air is prevented from contacting high-temperature molten salt in the valve body. The molten salt conveying device is convenient and flexible to install, good in sealing performance, not easy to cause retention or solidification of hot fluid, and capable of ensuring high-temperature meltingThe heat conducting medium of salt is smoothly transferred between different containers, and the molten salt medium does not contact the inner wall of the valve body 110 and the internal parts during the period, so that the leakage level of the molten salt loading valve 100 is lower than 10 ^-4 Pa·m ³ And/s, safety and reliability.

In some embodiments, the first molten salt tank may be stationary and the second molten salt tank may be mobile, the molten salt delivery device being capable of transferring material within the first molten salt tank to the second molten salt tank. The sealing performance is good, so that the device is suitable for conveying special materials.

The connecting pipe 200 is convenient to detach, simple and convenient to operate and good in sealing performance. Specifically, before the connection pipe 200 is removed, the external transfer pump is turned off first, molten salt stops flowing, then inert gas is introduced into the valve body 110, the inert gas blows back molten salt in the pipeline into the molten salt tank after passing through the molten salt loading valve 100, and then the temperature of the connection pipe 200 is gradually reduced, so that no molten salt remains in the molten salt loading valve 100.

In this embodiment, the molten salt loading valves 100 at both ends of the connection pipe 200 are arranged in parallel side by side, and the entire molten salt conveying device has a reasonable and compact structure, saves installation space, and facilitates the rotation of the hand wheel 124 by a worker. In some embodiments, the molten salt loading valve 100 may also be arranged face-to-face, or back-to-back, depending on the actual operating conditions.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims (14)

1. The molten salt loading valve is characterized by comprising a valve body, wherein a first channel for fluid to pass through is formed in the valve body; the valve body is also provided with a second channel for inserting an external butt joint piece, the first channel is arranged to be communicated with the butt joint piece in a sealing way when the butt joint piece is inserted into the inner cavity of the valve body, and the butt joint part of the first channel and the butt joint piece is positioned in the inner cavity of the valve body;

be equipped with first opening and second opening on the valve body, first opening with the second opening with the inner chamber intercommunication of valve body, sealed intercommunication has the intake pipe on the first opening, sealed intercommunication of second opening has the outlet duct, the intake pipe the outlet duct with form gas circuit between the inner chamber of valve body, the intake pipe and/or the outlet duct is equipped with pressure monitoring device, pressure monitoring device is used for measuring the pressure of the intracavity gas of valve body.

2. The molten salt loading valve of claim 1, wherein the valve body includes a valve seat provided with a boss on a side thereof opposite to the second passage, the boss being provided so as to be able to abut against the abutment, the first passage being provided in the valve seat, an opening of the first passage being located at an end face of the boss abutting against the abutment.

3. The molten salt loading valve of claim 1 wherein the first passage is coaxially disposed with the second passage.

4. The molten salt loading valve of claim 1 further comprising a valve cover and a valve stem, the valve cover being sealingly connected to the valve body, an interior cavity of the valve cover being in communication with an interior cavity of the valve body, the valve stem being slidably mounted on the valve cover, an end of the valve stem being connected to a shutter, the valve stem being capable of moving the shutter between a first position and a second position;

the abutment is insertable into the second passage and in sealing communication with the first passage when the shutter is in the first position; the shutter closes the first passage when the shutter is in the second position.

5. The molten salt loading valve of claim 4, wherein the valve cover defines a mounting bore, the valve stem being slidably mounted within the mounting bore, a first set of packing disposed along an outer peripheral surface of the valve stem being disposed within the mounting bore.

6. The molten salt loading valve of claim 5, wherein the valve stem is sleeved with a bellows, the bellows is located on one side of the valve cover close to the flashboard, one end of the bellows surrounds the mounting hole and is in sealing connection with the valve cover, and the other end of the bellows is far away from the mounting hole and is in sealing connection with the outer wall surface of the valve stem.

7. The molten salt loading valve of claim 4, wherein a valve body socket is disposed between the valve body and the valve cover, one end of the valve body socket is in sealing connection with one end of the valve body, the other end of the valve body socket is in sealing connection with the valve cover, and an inner cavity of the valve body, an inner cavity of the valve cover and an inner cavity of the valve body socket are communicated and form a sealed chamber.

8. The molten salt loading valve of claim 7, wherein a bracket is connected to the valve cover, a hand wheel is mounted on the end of the valve rod away from the flashboard, the hand wheel is fixed relative to the valve rod, and the limit mounting piece is in matched rotary connection with the bracket;

and the valve rod is also sleeved with a locking nut for locking the limit mounting piece.

9. A molten salt delivery device comprising a docking piece and the molten salt loading valve of any one of claims 1 to 8, the docking piece being a connecting tube.

10. The molten salt conveying device according to claim 9, wherein the end part of the connecting pipe is connected with a sealing sleeve, a second group of sealing fillers are arranged in the sealing sleeve, and the second group of sealing fillers are arranged on the end surface of the connecting pipe;

the molten salt loading valve further comprises a valve seat, a boss is arranged on one side, opposite to the connecting pipe, of the valve seat, the boss is arranged to be capable of being abutted to the end face of the second group of sealing fillers, the first channel is arranged in the valve seat, and an opening of the first channel is located on the end face, abutted to the second group of sealing fillers, of the boss.

11. The molten salt delivery device of claim 9, further comprising a valve assembly interface mounted to the valve body, the connecting tube passing through the valve assembly interface and extending into the second passage, a third set of sealing fillers disposed along an outer peripheral surface of the connecting tube being disposed within the valve assembly interface.

12. The molten salt conveying device of claim 11, further comprising a pressure ring sleeved on the connecting tube, the pressure ring being disposed at an end of the third set of sealing fillers remote from the first channel, the pressure ring being configured to compress the third set of sealing fillers within the valve assembly interface to enable the third set of sealing fillers to circumferentially fit and seal with an outer wall surface of the connecting tube.

13. The molten salt delivery apparatus of claim 11, further comprising a first securing member secured to the connecting tube, a second securing member secured to the valve assembly interface, the first securing member being fixedly connected to the second securing member by a connecting member.

14. The molten salt delivery apparatus of claim 9 further comprising a first molten salt tank, a second molten salt tank, the first molten salt tank and the second molten salt tank each having the molten salt loading valve mounted thereon, the first molten salt tank and the second molten salt tank each in communication with the first passage of the molten salt loading valve;

the first molten salt tank and the second molten salt tank are respectively inserted into one end of the connecting pipe.