CN212297901U

CN212297901U - Independently heat insulating high temperature molten salt valve of heating intelligence

Info

Publication number: CN212297901U
Application number: CN202020263142.8U
Authority: CN
Inventors: 王光存; 何冰; 陈善功
Original assignee: Jiangsu XCMG Construction Machinery Institute Co Ltd
Current assignee: Jiangsu XCMG Construction Machinery Institute Co Ltd
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2021-01-05
Anticipated expiration: 2030-03-05

Abstract

The utility model discloses an autonomous heating intelligent heat preservation high-temperature molten salt valve, which comprises a valve body, a gland and a heat preservation shell; the center of the valve body is provided with a molten salt channel with two through ends, two ends of the molten salt channel of the valve body are provided with valve body flanges, the middle part of the valve body is provided with a valve rod cavity and communicated with the molten salt channel of the valve body, and molten salt sealing is carried out through the close fit of a gland and the valve rod cavity; the heat preservation shell is arranged outside the valve body, high-temperature heat conduction oil and the electric heating tube are arranged in the heat preservation shell, and the high-temperature heat conduction oil inside the heat preservation shell circularly flows through the electric heating tube and the heat preservation shell to heat and preserve heat of the valve body. Based on the utility model discloses a high temperature molten salt valve can realize independently heating, the intelligence of valve body keeps warm under the no external heat source condition, effectively prevents the crystallization of valve body fused salt, is fit for filtering recovery and the used cycle of high temperature fused salt for the salt bath.

Description

Independently heat insulating high temperature molten salt valve of heating intelligence

Technical Field

The utility model relates to an independently heat insulating high temperature molten salt valve of heating intelligence belongs to high temperature valve technical field.

Background

The cleaning of paint, oil stain and rust is an important difficult problem for the remanufacturing of parts of engineering machinery, and the molten salt cleaning can efficiently remove the pollution layers of the paint, the oil stain, the rust and the like on the surfaces of the remanufactured parts by utilizing the physical and chemical actions of thermal expansion, surface tension, high-temperature vaporization, oxidation reduction and the like of high-temperature molten salt, so that the cleaning method has great potential.

Although the molten salt has a self-cleaning function and can continuously react with organic matters until precipitates are generated, after the molten salt is cleaned for a period of time, the cleaning effect and efficiency of the molten salt are reduced due to the increase of solid impurities such as iron chips, sand grains, iron rust and the like, and at the moment, the molten salt is required to be led out of the cleaning tank through the salt discharge valve and the internal solid impurities are filtered. However, because the melting point of the molten salt cleaning formula is higher, namely about 250 ℃, the whole valve is difficult to uniformly and continuously maintain high temperature, and once the molten salt is crystallized and solidified in the valve, the valve port is blocked. The problem of molten salt discharge seriously influences the filtration recovery and the recycling of the molten salt, and a high-temperature valve with the integral temperature higher than the melting point of the molten salt is required to be adopted to ensure that the molten salt can smoothly pass through.

At present, domestic published reports about high-temperature molten salt valves are less than documents. Generally, relevant research and reports are provided in the fields of thermal power plants, nuclear power plants and the like, and through retrieval and analysis, the high-temperature valve mainly comprises the following patents:

patent [1 ]: the utility model discloses a novel light and heat electricity generation molten salt valve of preventing remaining, application number is 201610394218.9. The molten salt valve comprises a valve body, a valve rod, a support, a hand wheel, a medium inlet, a medium outlet channel and the like. The bottom of the valve rod is provided with a valve clack, the valve clack is provided with an annular inclined plane and is matched with the annular lower inclined plane of the valve port, and the lower inclined plane of the valve port is provided with a hard alloy layer which can effectively intercept fused salt. Through 10~20 of medium inlet channel and horizontal plane contained angle, 10~20 of medium outlet channel and horizontal plane contained angle, the effectual fused salt that prevents is remained.

Patent [2 ]: the utility model is named as an electric heating molten salt valve with application number of 201510163433.3. The molten salt valve comprises a valve body, a valve seat, a valve rod, a valve clack, an electric tracing and the like. The valve seat is cylindrical and is provided with a liquid through port. The valve rod is inserted into the valve seat and is provided with a movable valve clack, and the valve clack is provided with a notch corresponding to the position of the liquid through port. The electric heat tracing is arranged outside the valve body and serves as a heating device, the electric heat tracing adopts a flexible wrapping object which can be wound on the valve, an electric heat tracing wire is arranged on the heat insulation layer, the inner rainproof layer and the outer rainproof layer are correspondingly provided with nylon thread gluing which are used for buckling mutually, the power supply junction box is connected with the electric heat tracing wire through a lead, and the valve body is heated through electric heat energy.

Patent [3 ]: the utility model provides a take heat preservation pipeline's ceramic ball valve, application number is 201820097213.4. The ceramic ball valve consists of handle, valve body, valve seat, ball, valve rod, heat insulating pipeline, etc. The valve body is internally provided with a valve cavity which penetrates through the valve body, the valve body and the valve seat are provided with an intercommunicated heat preservation pipeline, the heat preservation pipeline comprises an air inlet end and an air outlet end, the air inlet end is positioned at the edge of the valve body and communicated with the outside, the air outlet end is positioned at the edge of the valve seat and communicated with the valve cavity, one side of the valve body, which is compared with the heat preservation pipeline, is provided with a dead slot communicated with the outside, and high-temperature gas is introduced into the pipeline and the cavity.

SUMMERY OF THE UTILITY MODEL

Through analysis, the existing high-temperature molten salt valve has the following problems:

firstly, the molten salt valve in patent [1] has novel sealing and residue-preventing function design, and the design of inlet and outlet pipeline angles ensures that the molten salt can be effectively prevented from being remained under the high-temperature condition, but the valve body does not have the self-heating and heat-preserving functions, and if the use environment temperature is lower, the molten salt in the valve body is still very easy to crystallize, so that blockage is caused.

Secondly, the high temperature valve in patent [2] twines flexible electric tracing, i.e. heating wire, outside the valve body, and the winding technology is complicated and the power of the electric tracing sold in the market at present is lower (less than 80W), and the heating efficiency becomes low because of the existence of insulating layer after the multilayer winding, needs to preheat for a long time and can reach the requirement of fused salt discharge temperature, and it is inconvenient to use. And the heat preservation valve body lacks the temperature stability control function, is difficult to realize the accurate control of valve body temperature.

Thirdly, the design of the heat preservation structure of the high temperature valve in the patent [3] is novel, the periphery of the valve body is made into an enclosing cavity by adopting a welding means, high temperature and high pressure gas is needed to be introduced into the cavity to maintain the temperature of the valve body when the high temperature valve is used, and the high temperature valve cannot be used on the equipment installation site without an external high temperature gas source. The structure of the ball valve is not suitable for the use requirement of high-temperature molten salt, the molten salt is easy to leak due to too short sealing distance, and the handle is easy to scald due to too high temperature; because the heat preservation valve lacks the temperature stabilization control function, be difficult to realize the accurate control of valve body temperature.

Exist not enoughly among the prior art, the utility model provides an autonomic heating and intelligent heat retaining high temperature molten salt valve solves present high temperature molten salt valve heating efficiency low, the on-the-spot use inconvenient, the easy crystallization scheduling problem of fused salt, is fit for filtering recovery and the recycling of high temperature fused salt for the salt bath.

In order to solve the technical problem, the utility model provides an autonomous heating intelligent heat preservation high-temperature molten salt valve, which comprises a valve body, a gland and a heat preservation shell; the center of the valve body is provided with a molten salt channel with two through ends, two ends of the molten salt channel of the valve body are provided with valve body flanges, the middle part of the valve body is provided with a valve rod cavity and communicated with the molten salt channel of the valve body, and molten salt sealing is carried out through the close fit of a gland and the valve rod cavity; the heat preservation shell is arranged outside the valve body, high-temperature heat conduction oil and the electric heating tube are arranged in the heat preservation shell, and the high-temperature heat conduction oil inside the heat preservation shell circularly flows through the electric heating tube and the heat preservation shell to heat and preserve heat of the valve body.

As a preferred embodiment, the valve body is a Y-shaped stop valve, and the molten salt channel is positioned in the center of the valve body and is in a straight line and penetrates through two ends of the valve body.

As a preferred embodiment, a valve seat is arranged at the joint of the valve body and the valve rod cavity; the valve rod cavity and the valve body form a certain included angle in the horizontal direction, so that the size of the cross section of the medium channel is ensured; an integrated valve rod is arranged in the valve rod cavity.

As a better embodiment, the integrated valve rod is a stepped cylindrical rod, the position with a larger diameter at the lower part of the integrated valve rod is a valve clack, a hard alloy coating is sprayed on the surface of the valve clack part so as to improve the wear resistance and prolong the service life, the smooth position at the middle part of the integrated valve rod is a sealing rod, and the upper part of the integrated valve rod is a valve rod thread; the length of the valve clack part of the integrated valve rod is larger than the distance between the valve seat and the valve rod cavity, so that the valve clack of the integrated valve rod is ensured to be tightly matched with the valve rod cavity; and a high-temperature corrugated pipe and a high-temperature sealing sheet are arranged between the middle part of the integrated valve rod and the valve rod cavity.

As a better embodiment, the bottom of the high-temperature corrugated pipe is smooth and is contacted with the valve clack part of the integrated valve rod, and the top of the high-temperature corrugated pipe is embedded with the high-temperature sealing sheet into a whole, so that the high-temperature corrugated pipe is prevented from rotating in the rising process of the integrated valve rod; the gland is positioned at the top end of the valve rod cavity, the lower part of the gland is connected with the valve rod cavity through a flange so as to compress the high-temperature sealing sheet, and the upper part of the gland is provided with a valve rod nut which is matched with the threads of the integrated valve rod so as to realize the lifting of the integrated valve rod; the outside of valve body still is provided with the hand wheel, and the top of integral type valve rod is passed through the nut and is connected with the hand wheel, through the rotation of hand wheel, realizes the rotation and the lift of integral type valve rod.

As a better embodiment, the heat preservation shell comprises a heat preservation upper shell and a heat preservation bottom shell, the heat preservation upper shell and the heat preservation bottom shell are respectively arranged around the molten salt channel of the valve body, the heat preservation upper shell is in an omega shape, and two ends of the heat preservation upper shell are fixedly connected with the valve body flange; the heat-insulating bottom shell is U-shaped and is fixedly connected with the heat-insulating upper shell; the heat preservation cavity formed by the heat preservation upper shell and the heat preservation bottom shell is filled with high-temperature heat conduction oil.

As a better embodiment, a partition plate is arranged in the center of the heat-preservation bottom shell, two sides of the partition plate are fixedly connected with the heat-preservation bottom shell, the upper end of the partition plate is close to the molten salt channel of the valve body, but an upper end gap is reserved, the lower end of the partition plate is close to the heat-preservation bottom shell, a lower end gap is also reserved, and the lower end gap is larger than the upper end gap; the electric heating pipe is positioned at the bottom of one side of the heat-preservation bottom shell, and the upper edge of the electric heating pipe is flush with the lower edge of the partition plate; the electric heating pipe at the bottom of the heat preservation bottom shell heats nearby high-temperature heat conduction oil in the using process, the high-temperature heat conduction oil is heated and rises under the driving of convection, and meanwhile, under the blocking of the partition plate, a circulating flow which flows around a molten salt channel of the valve body is formed in the heat preservation cavity, and the molten salt in the valve body is continuously heated.

As a better embodiment, an oil storage tank is arranged above the valve body and is communicated with the heat-insulating upper shell through a pipeline, and when the volume of high-temperature heat conduction oil in the heat-insulating cavity expands or shrinks along with the change of the oil temperature, the oil storage tank plays a role in storing or supplementing oil, so that the heat conduction oil in the heat-insulating cavity is ensured to be filled.

As a better embodiment, the oil storage tank is provided with an exhaust safety valve, an air inlet safety valve and an oil filling port, and the exhaust safety valve is used for discharging part of gas in the heating and heat preservation process to ensure that the pressure in the oil storage tank does not exceed the set maximum pressure; when the temperature is reduced, the air inlet safety valve is used for supplementing part of gas to prevent the oil storage tank from being deformed under pressure; when the heat conducting oil in the oil storage tank is too little, the heat conducting oil is supplemented into the oil storage tank through the oil injection port.

In a preferred embodiment, a pressure sensor is mounted on the side wall of the oil storage tank for monitoring the gas pressure in the oil storage tank; a temperature sensor is arranged on the opposite side of the oil storage tank on the heat preservation shell and used for monitoring the temperature of heat conducting oil in the heat preservation cavity; a temperature controller is arranged outside the valve body and used for controlling the temperature of heat conducting oil in the heat insulation cavity; the temperature controller is respectively connected with the pressure sensor, the temperature sensor and the electric heating tube through control circuits and is used for detecting and displaying the temperature of the heat conduction oil and the gas pressure in real time, and the on-off of the electric heating tube circuit is controlled through PID (proportion integration differentiation) to ensure that the temperature of the heat conduction oil in the heat preservation cavity is maintained at the set temperature of the system.

The utility model discloses the beneficial effect who reaches: at first, based on the utility model discloses a high temperature molten salt valve can realize the autonomic heating, the intelligence heat preservation of valve body under the no external heat source condition, effectively prevents the crystallization of valve body fused salt, is fit for filtering recovery and the used cycle of high temperature fused salt for the salt bath. Moreover, the utility model discloses an independently heat preservation's high temperature molten salt valve of heating has following advantage: (1) and (3) sealing: the integrated valve rod is a step-shaped cylindrical rod, the valve clack is arranged at the position with the larger diameter at the lower part of the integrated valve rod, the sealing rod is arranged at the smooth position at the middle part of the integrated valve rod, and the valve rod thread is arranged at the upper part of the integrated valve rod. The length of the valve clack part is larger than the distance between the hard alloy valve seat and the valve rod cavity, and the valve clack of the integrated valve rod is ensured to be tightly matched with the valve rod cavity. And a high-temperature corrugated pipe and a high-temperature sealing sheet are arranged between the middle part of the valve rod and the valve rod cavity. The fused salt sealing is realized by the close fit of the integrated valve rod, the high-temperature corrugated pipe, the high-temperature sealing sheet, the gland and the like with the valve rod cavity, and the fused salt sealing device has the advantages of simple structure, good sealing effect and the like. (2) In the aspect of autonomous heating: a heat preservation cavity formed by a heat preservation upper shell and a heat preservation bottom shell is arranged around the molten salt channel of the valve body, and high-temperature heat conduction oil is filled in the heat preservation cavity. The center of the heat preservation bottom shell is provided with a partition plate, one side of the bottom of the heat preservation bottom shell is provided with an electric heating tube, and the upper edge of the electric heating tube is flush with the lower edge of the partition plate. Circulation flowing around the valve body molten salt channel is formed in the heat preservation cavity by means of convection and blocking of the partition plate, molten salt in the valve body is continuously heated, the heating process is stable, and the heating temperature is uniform. (3) And (3) temperature control: the molten salt valve is provided with a temperature controller and a temperature sensor, can detect and display the temperature of heat conducting oil in the heat preservation cavity in real time, controls the on-off of an electric heating tube circuit through a PID technology, ensures that the temperature of the heat conducting oil in the heat preservation cavity is maintained at the set temperature of the system, and realizes the automation of heating and the intellectualization of heat preservation. (4) In the aspect of safety protection: the oil storage tank is communicated with the heat preservation cavity of the molten salt valve and is used for storing or supplementing oil and ensuring that the heat preservation cavity is filled with heat conduction oil. Simultaneously, be equipped with exhaust safety valve, the relief valve that admits air on the oil storage tank: the exhaust safety valve can exhaust part of gas in the heating and heat preservation process, so that the pressure in the oil storage tank does not exceed the set maximum pressure; when the temperature is reduced, the air inlet safety valve can supplement partial air to prevent the oil storage tank from being deformed under pressure. The safety of the automatic operation process of the molten salt valve is ensured by means of an oil storage tank, an exhaust safety valve, an air inlet safety valve and the like.

Drawings

Fig. 1 is a schematic structural diagram of a front view of a preferred embodiment of an autonomous heating intelligent thermal insulation high-temperature molten salt valve of the present invention.

Fig. 2 is a schematic diagram of a side view and a heat conducting oil flow direction in the heat preservation cavity of the preferred embodiment of the high-temperature molten salt valve with the autonomous heating intelligent heat preservation function of the present invention.

Fig. 3 is a simulation diagram of the flow direction of the heat conducting oil in the heat preservation cavity of the preferred embodiment of the high-temperature molten salt valve with the automatic heating and intelligent heat preservation function of the utility model.

The meanings of the symbols in the figures: 1-heat preservation upper shell, 2-valve body, 3-pressure sensor, 4-exhaust safety valve, 5-air inlet safety valve, 6-oil storage tank, 7-oil injection port, 8-hard alloy valve seat, 9-valve rod cavity, 10-integrated valve rod, 11-high temperature corrugated pipe, 12-high temperature sealing sheet, 13-gland, 14-hand wheel, 15-temperature sensor, 16-temperature controller, 17-heat preservation bottom shell, 18-electrothermal tube, 19-clapboard and 20-valve body flange.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1, fig. 2 and fig. 3, the utility model relates to an independently heat insulating high temperature molten salt valve of intelligence, molten salt valve are whole to be Y type stop valve, including valve body 2, integral type valve rod 10, high temperature bellows 11, high temperature gasket 12, gland 13, hand wheel 14, heat preservation shell (including heat preservation epitheca 1, heat preservation drain pan 17), oil storage tank 6, pressure sensor 3, temperature sensor 15, electrothermal tube 18, temperature controller 16 etc. constitute. The central part of the valve body 2 is a molten salt channel with two through ends, the two ends are provided with valve body flanges 20, the middle part is a valve rod cavity 9 and forms an included angle of 50 degrees with the valve body 2, and molten salt sealing is realized by the close fit of the integrated valve rod 10, the high-temperature corrugated pipe 11, the high-temperature sealing sheet 12, the gland 13 and the like with the valve rod cavity 9. The outside heat preservation shell of valve body 2 comprises heat preservation epitheca 1 and heat preservation drain pan 17, and wraps up the fused salt passageway completely, is equipped with high temperature conduction oil and electrothermal tube 18 in the heat preservation shell (including heat preservation epitheca 1, heat preservation drain pan 17) to be linked together with batch oil tank 6, let inside conduction oil automatic cycle flow keep warm for fused salt valve body heating through the special design of electrothermal tube 18 and heat preservation shell (including heat preservation epitheca 1, heat preservation drain pan 17), guarantee that the fused salt flows through smoothly, do not crystallize, realize fused salt recycling.

The valve body 2 is a Y-shaped stop valve, the molten salt channel is positioned in the center of the valve body and linearly penetrates through the two ends of the valve body 2, turbulence and on-way loss are reduced, and high-temperature molten salt smoothly flows out.

The middle part of the valve body 2 is provided with a valve rod cavity 9 and is communicated with the molten salt channel of the valve body 2, the joint part of the valve body 2 and the valve rod cavity 9 is a hard alloy valve seat 8, namely, a welded annular hard alloy block is adopted, the wear resistance of the valve port is improved, and the service life of the valve port is prolonged. The valve rod cavity 9 and the horizontal plane of the valve body 2 form an included angle of 50 degrees, and the size of the cross section of the medium channel is ensured. An integral valve stem 10 is mounted in the valve stem cavity 9.

The integrated valve rod 10 is a stepped cylindrical rod, the larger diameter position of the lower part of the integrated valve rod is a valve clack, the smooth position of the middle part of the integrated valve rod is a sealing rod, and the upper part of the integrated valve rod is a valve rod thread. The surface of the valve clack part of the integrated valve rod 10 is sprayed with a hard alloy coating to improve the wear resistance and prolong the service life. The length of the valve clack part is larger than the distance between the hard alloy valve seat 8 and the valve rod cavity 10, and the valve clack of the integrated valve rod 10 is ensured to be tightly matched with the valve rod cavity 9. A high-temperature corrugated pipe 11 and a high-temperature sealing sheet 12 are arranged between the middle part of the integrated valve rod 10 and the valve rod cavity 9.

The bottom of the high-temperature corrugated pipe 11 is smooth and is in contact with the valve clack part of the integrated valve rod 10, the top of the high-temperature corrugated pipe 11 is embedded with the high-temperature sealing sheet 12 into a whole, and the integral valve rod 10 is prevented from rising to cause the rotation of the high-temperature corrugated pipe 11.

Gland 13 is located the 9 tops in valve rod chamber, and 13 lower parts of gland pass through flange joint in order to compress tightly high temperature gasket 12 with

valve rod chamber

9, and 13 upper portions of gland are valve-stem nut and the screw-thread fit realization integral type valve rod 10's of integral type valve rod 10 lift.

The top end of the integrated valve rod 10 is connected with a hand wheel 14 through a nut, and rotation and lifting of the valve rod are achieved through rotation of the hand wheel 14.

The periphery of the molten salt channel of the valve body 2 is provided with a heat-insulating upper shell 1 and a heat-insulating bottom shell 17, wherein the heat-insulating upper shell 1 is in an omega shape, and two ends of the heat-insulating upper shell are welded with the valve body flange 20 into a whole. The heat preservation bottom shell 17 is U-shaped and is integrally connected and assembled with the heat preservation upper shell 1 through threads, and the connection part is sealed by adopting high-temperature sealing. The heat preservation cavity formed by the heat preservation upper shell 1 and the heat preservation bottom shell 17 is filled with high-temperature heat conduction oil.

The center of the heat preservation bottom shell 17 is provided with a clapboard 19. The both sides of baffle 19 and heat preservation drain pan 17 welding are integrative, and the fused salt passageway that baffle 19 upper end is close to valve body 2 nevertheless reserves the space, and the baffle 19 lower extreme is close to heat preservation drain pan 17 and also reserves the space, and the bottom space is greater than the upper end space. The electric heating tube 18 is located at the bottom of one side of the thermal insulation bottom shell 17, and the upper edge of the electric heating tube 18 is flush with the lower edge of the partition plate 19. During use, the electric heating pipe 18 at the bottom of the heat preservation bottom shell 17 heats nearby heat conduction oil, the heat conduction oil is heated and rises under the driving of convection, and meanwhile, under the blocking of the partition plate 19, a circulation flowing around a molten salt channel of the valve body 2 is formed in the heat preservation cavity, and the molten salt in the valve body 2 is continuously heated.

An oil storage tank 6 is arranged above the valve body 2, the oil storage tank 6 is communicated with the heat-insulating upper shell 1 through a pipeline, and when the volume of heat-conducting oil in the heat-insulating cavity expands or shrinks along with the change of oil temperature, the oil storage tank plays a role in storing or supplementing oil, and the heat-conducting oil is filled in the heat-insulating cavity. Meanwhile, the oil storage tank 6 is provided with an exhaust safety valve 4, an air inlet safety valve 5 and an oil filling port 7: the exhaust safety valve 4 can exhaust part of gas in the heating and heat preservation process, so that the pressure in the oil storage tank 6 is not more than the set highest pressure; when the temperature is reduced, the air inlet safety valve 5 can supplement partial gas to prevent the oil storage tank 6 from being deformed under pressure; when the heat conducting oil in the oil storage tank 6 is too little, the heat conducting oil is supplemented to the system through the oil injection port 7.

The pressure sensor 3 is mounted on the side wall of the oil storage tank 6 and used for monitoring the gas pressure in the oil storage tank 6. And a temperature sensor 15 is arranged on the opposite side of the heat-preservation upper shell 1 and the oil storage tank 6 and used for monitoring the temperature of heat-conducting oil in the heat-preservation cavity.

The temperature controller 16 is arranged outside the valve body 2 and used for controlling the temperature of heat conducting oil in the heat preservation cavity. The temperature controller 16 is connected with the pressure sensor 3, the temperature sensor 15, the electric heating tube 18 and the like through control lines, can detect and display the temperature and the gas pressure of the heat conducting oil in real time, controls the on-off of the circuit of the electric heating tube 18 through a PID technology, and ensures that the temperature of the heat conducting oil in the heat preservation cavity is maintained at the set temperature of the system.

It should be noted that, the valve rod 10 of this embodiment adopts an integrated design, and is composed of a valve flap, a valve rod, a thread, and the like, and also can adopt a split design, and thus, related functions such as opening and closing and sealing of the valve port are accomplished. This embodiment heat preservation drain pan central authorities are equipped with the baffle, and the fused salt passageway that the baffle upper end is close to the valve body nevertheless reserves the space, and the baffle lower extreme is close to heat preservation drain pan and also reserves the space, and the bottom space is greater than the upper end space. An electric heating tube is arranged on one side of the bottom of the heat preservation bottom shell, and the upper edge of the electric heating tube is flush with the lower edge of the partition plate. The optimal design of the circulation that forms around valve body fused salt passageway flow in the heat preservation intracavity, also can change the baffle about the space, improve or reduce the relative position of electrothermal tube and realize the convection current of conduction oil, still be in the protection range of the utility model.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims

1. The high-temperature molten salt valve capable of automatically heating and intelligently preserving heat is characterized by comprising a valve body (2), a gland (13) and a heat preservation shell; the center of the valve body (2) is provided with a molten salt channel with two through ends, two ends of the molten salt channel of the valve body (2) are provided with valve body flanges (20), the middle part of the valve body (2) is provided with a valve rod cavity (9) and communicated with the molten salt channel of the valve body (2), and molten salt sealing is carried out through the close fit of the gland (13) and the valve rod cavity (9); the heat preservation shell is arranged outside the valve body (2), high-temperature heat conduction oil and an electric heating tube (18) are arranged in the heat preservation shell, and the high-temperature heat conduction oil in the heat preservation shell circularly flows to heat and preserve heat of the valve body (2) through the electric heating tube (18) and the heat preservation shell.

2. The high-temperature molten salt valve with the autonomous heating intelligent heat preservation function as claimed in claim 1, wherein the valve body (2) is a Y-shaped stop valve, and the molten salt channel is located in the center of the valve body (2) and is in a straight line and penetrates through two ends of the valve body (2).

3. The high-temperature molten salt valve with the automatic heating and intelligent heat preservation function as claimed in claim 1, wherein a valve seat (8) is arranged at the joint of the valve body (2) and the valve rod cavity (9); the valve rod cavity (9) and the valve body (2) form a certain included angle in the horizontal direction, so that the size of the cross section of the medium channel is ensured; an integrated valve rod (10) is arranged in the valve rod cavity (9).

4. The self-heating intelligent heat-preservation high-temperature molten salt valve according to claim 3, wherein the integrated valve rod (10) is a stepped cylindrical rod, the position with the larger diameter at the lower part of the integrated valve rod (10) is a valve flap, and a hard alloy coating is sprayed on the surface of the valve flap; the middle smooth position of the integrated valve rod (10) is a sealing rod, and the upper part of the integrated valve rod (10) is a valve rod thread; the length of the valve clack part of the integrated valve rod (10) is larger than the distance between the valve seat (8) and the valve rod cavity (9), so that the valve clack of the integrated valve rod (10) is ensured to be tightly matched with the valve rod cavity (9); and a high-temperature corrugated pipe (11) and a high-temperature sealing sheet (12) are arranged between the middle part of the integrated valve rod (10) and the valve rod cavity (9).

5. The self-heating intelligent heat preservation high-temperature molten salt valve is characterized in that the bottom of the high-temperature corrugated pipe (11) is smooth and is in contact with the valve clack part of the integrated valve rod (10), the top of the high-temperature corrugated pipe (11) is embedded into the high-temperature sealing sheet (12) to prevent the integrated valve rod (10) from ascending to cause the high-temperature corrugated pipe (11) to rotate; the gland (13) is positioned at the top end of the valve rod cavity (9), the lower part of the gland (13) is connected with the valve rod cavity (9) through a flange so as to compress the high-temperature sealing sheet (12), and the upper part of the gland (13) is used for realizing the lifting of the integrated valve rod (10) by the threaded matching of a valve rod nut and the integrated valve rod (10); the outside of valve body (2) still is provided with hand wheel (14), the top of integral type valve rod (10) pass through the nut with hand wheel (14) are connected, through the rotation of hand wheel (14), realize the rotation and the lift of integral type valve rod (10).

6. The high-temperature molten salt valve with the autonomous heating intelligent heat preservation function according to claim 1, wherein the heat preservation shell comprises a heat preservation upper shell (1) and a heat preservation bottom shell (17), the heat preservation upper shell (1) and the heat preservation bottom shell (17) are respectively arranged around a molten salt channel of the valve body (2), the heat preservation upper shell (1) is in an omega shape, and two ends of the heat preservation upper shell (1) are fixedly connected with the valve body flange (20); the heat-insulation bottom shell (17) is U-shaped, and the heat-insulation bottom shell (17) is fixedly connected with the heat-insulation upper shell (1); the high-temperature heat conduction oil is arranged in a heat preservation cavity formed by the heat preservation upper shell (1) and the heat preservation bottom shell (17).

7. The high-temperature molten salt valve with the autonomous heating intelligent heat preservation function as claimed in claim 6, wherein a partition plate (19) is arranged in the center of the heat preservation bottom shell (17), two sides of the partition plate (19) are fixedly connected with the heat preservation bottom shell (17), the upper end of the partition plate (19) is close to the molten salt channel of the valve body (2) and is reserved with an upper end gap, the lower end of the partition plate (19) is close to the heat preservation bottom shell (17) and is also reserved with a lower end gap, and the lower end gap is larger than the upper end gap; the electric heating pipe (18) is positioned at the bottom of one side of the heat-preservation bottom shell (17), and the upper edge of the electric heating pipe (18) is flush with the lower edge of the partition plate (19); in the using process, the electric heating pipe (18) at the bottom of the heat-insulating bottom shell (17) heats nearby high-temperature heat conduction oil, the high-temperature heat conduction oil is heated and rises under the driving of convection, and meanwhile, a circulating flow flowing around a molten salt channel of the valve body (2) is formed in the heat-insulating cavity under the blocking of the partition plate (19), so that the molten salt in the valve body (2) is continuously heated.

8. The high-temperature molten salt valve with the automatic heating and intelligent heat preservation functions as claimed in claim 6, wherein an oil storage tank (6) is arranged above the valve body (2), the oil storage tank (6) is communicated with the heat preservation upper shell (1) through a pipeline, and when the volume of high-temperature heat conduction oil in the heat preservation cavity expands or shrinks along with the change of oil temperature, the oil storage tank (6) plays a role in oil storage or oil supplement to ensure that the heat preservation cavity is filled with the heat conduction oil.

9. The high-temperature molten salt valve with the autonomous heating intelligent heat preservation function as claimed in claim 8, characterized in that an exhaust safety valve (4), an air inlet safety valve (5) and an oil filling port (7) are arranged on the oil storage tank (6), the exhaust safety valve (4) is used for exhausting part of gas in the heating and heat preservation processes, and the pressure in the oil storage tank (6) is ensured not to exceed the set maximum pressure; when the temperature is reduced, the air inlet safety valve (5) is used for supplementing partial gas to prevent the oil storage tank (6) from being deformed under pressure; when the heat conduction oil in the oil storage tank (6) is too little, the heat conduction oil is supplemented into the oil storage tank (6) through the oil injection port (7).

10. The high-temperature molten salt valve with the autonomous heating intelligent heat preservation function of claim 8, characterized in that a pressure sensor (3) is installed on the side wall of the oil storage tank (6) and used for monitoring the gas pressure in the oil storage tank (6); a temperature sensor (15) is arranged on the opposite side of the oil storage tank (6) on the heat preservation shell and used for monitoring the temperature of heat conducting oil in the heat preservation cavity; a temperature controller (16) is arranged outside the valve body (2) and used for controlling the temperature of heat conducting oil in the heat insulation cavity; the temperature controller (16) is respectively connected with the pressure sensor (3), the temperature sensor (15) and the electric heating tube (18) through control circuits and is used for detecting and displaying the temperature and the gas pressure of heat conduction oil in real time, and the on-off of a circuit of the electric heating tube (18) is controlled through PID (proportion integration differentiation) to ensure that the temperature of the heat conduction oil in the heat insulation cavity is maintained at the set temperature of the system.