CN112879617B - Spring type safety valve and assembling method thereof - Google Patents
Spring type safety valve and assembling method thereof Download PDFInfo
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- CN112879617B CN112879617B CN202110112194.4A CN202110112194A CN112879617B CN 112879617 B CN112879617 B CN 112879617B CN 202110112194 A CN202110112194 A CN 202110112194A CN 112879617 B CN112879617 B CN 112879617B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K49/00—Means in or on valves for heating or cooling
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a spring type safety valve, and belongs to the technical field of safety valves. The invention provides a spring type safety valve and an assembly method thereof, aiming at solving the problem that the existing spring type safety valve is low in efficiency in the spring pre-tightening process. A spring-loaded safety valve comprising: spring valve cover subassembly, valve rod, cooler, valve body, disk seat and seal assembly, the spring valve cover subassembly includes: the spring cover, gland nut, the hollow hydraulic means of nonoculture, the adjusting screw, go up the spring holder, a spring, lower spring holder and fender ring, the hollow hydraulic means of nonoculture is fixed on the spring cover, the pneumatic cylinder of the hollow hydraulic means of nonoculture drives the valve rod through gland nut and reciprocates, go up spring holder and spring cover fixed mounting, the fixed fender ring that is equipped with on the lower spring holder mounted position on the valve rod, when the valve rod rebound, keep off the ring and drive down the spring holder rebound, the spring compresses or resets along with reciprocating of lower spring holder. The invention realizes the pre-tightening of the spring through the single-action hollow hydraulic device and improves the efficiency.
Description
Technical Field
The invention belongs to the technical field of safety valves, and particularly relates to a spring type safety valve.
Background
The safety valve is an automatic valve, when the pressure of a medium in a boiler, a pressure container and a pressure pipeline is greater than the working pressure and reaches the setting pressure of the safety valve, the safety valve is automatically opened to achieve the purpose of pressure relief, and when the pressure is less than the pressure of a valve recoiling seat, the safety valve is closed to achieve the pressure relief, so that the safety valve is used for protecting equipment such as the boiler, the pressure container and the pressure pipeline and avoiding dangerous accidents such as leakage and explosion when the pressure is too high.
Safety valves are classified into a hammer type, a lever type, a spring type and a pilot type according to structural forms. The spring type safety valve has a working principle that a spring is pre-compressed in an assembling process, so that the spring generates elastic force to act on a closing part, and the closing part and a valve seat are closed to achieve the purpose of sealing. If the medium pressure in the pressure container is abnormally too high and the pressure for pushing the closing piece is larger than the elastic force of the spring, the safety valve jumps to form a pressure relief channel, so that the purpose of pressure relief is achieved. When the pushing force is smaller than the pretightening force, the tight returning seat achieves the sealing state again.
At present, the existing methods for pre-tightening springs are press compression springs or weight applied pressure compression springs, the methods are limited by special equipment and large working space, the pressure applied by a weight can also cause unhooking of the weight to cause damage to a safety valve and injury to assembly operators, and meanwhile, the assembly methods are low in efficiency. In addition, under some special working conditions, the existing spring type safety valve needs larger opening pressure when reaching a working state, so that a spring needs to apply larger force to a pressing piece to complete the tripping of the safety valve, the same pressing force needs to be applied to the spring in the safety valve assembling process to enable the spring to be in a pre-tightening state, and the spring is particularly operated to apply a pressure pressing spring equal to the pre-tightening force downwards to a spring cover to enable the spring cover to be in the pre-tightening state, so that the spring cover is difficult to operate, inaccurate, long in time-consuming and low in efficiency.
Disclosure of Invention
In order to solve the problem that the existing spring type safety valve is low in efficiency in the spring pre-tightening process, the invention provides a spring type safety valve and an assembling method thereof.
The technical scheme of the invention is as follows:
a spring-loaded safety valve comprising: spring valve cover subassembly, valve rod, cooler, valve body, disk seat and seal assembly, spring valve cover subassembly, cooler and valve body from top to bottom connect gradually, the bottom processing of valve body has the feed inlet, the processing of valve body side has the discharge gate, feed inlet inner wall fixed mounting has the disk seat, the seal assembly lower extreme is connected with the disk seat, and the seal assembly upper end is connected with the valve body upper end, the valve rod runs through in spring valve cover subassembly and cooler and can reciprocate wherein, and the bottom and the seal assembly of valve rod are connected, the spring valve cover subassembly includes: the single-action hollow hydraulic device is fixed at the upper end of the spring cover, a hydraulic cylinder of the single-action hollow hydraulic device is connected with a valve rod through the compression nut and drives the valve rod to move up and down through the compression nut, the upper spring seat, the spring, the lower spring seat and the baffle ring are arranged in the spring cover, the upper spring seat, the spring and the lower spring seat are respectively sleeved on the valve rod, the adjusting screw is arranged between the upper end of the spring cover and the valve rod, the upper spring seat is fixedly installed with the spring cover through the adjusting screw and a positioning pin, the baffle ring is fixedly installed at the installation position of the lower spring seat on the valve rod, a groove matched with the baffle ring is processed on the lower spring seat, and when the valve rod moves upwards, the baffle ring drives the lower spring seat to move upwards, the upper end and the lower end of the spring are respectively abutted against the upper spring seat and the lower spring seat, the spring is compressed or reset along with the up-and-down movement of the lower spring seat, and the position of the valve rod is fixed by screwing the compression nut.
Preferably, a stroke control ring is disposed on the valve stem at a position below the spring valve cover assembly.
Preferably, the seal assembly comprises: the valve comprises a lower adjusting ring, a valve clack, an upper adjusting ring and a guide sleeve, wherein the guide sleeve is installed with the hole wall at the upper end of a valve body, the valve clack is installed with the valve body through the guide sleeve, the outer wall of the guide sleeve is sleeved with the upper adjusting ring, the upper adjusting ring is sleeved on the upper portion of a valve seat, the upper adjusting ring is connected with the valve body through an upper adjusting ring locking bolt, and the lower adjusting ring is connected with the valve body through a lower adjusting ring locking bolt.
Preferably, the valve flap is mounted to the guide sleeve by a valve flap clamping ring.
Preferably, a bearing is arranged on a hole wall of the upper spring seat, which is in contact with the valve rod.
Preferably, a bearing pressure pad is arranged between the upper spring seat and the valve rod at the upper end of the bearing.
An assembly method of a spring type safety valve comprises the following steps:
and 5, installing a single-action hollow hydraulic device at the position of the valve rod above the spring cover, fixing the compression nut by using a hydraulic wrench, starting the single-action hollow hydraulic device to enable the hydraulic cylinder to rise upwards to push the compression nut to drive the valve rod, applying upward pressing force to the spring by the valve rod through the retaining ring to enable the spring to compress, completing spring pre-tightening when the thrust of the single-action hollow hydraulic device reaches pre-tightening force, and screwing the compression nut by using the hydraulic wrench after pre-tightening to complete the assembly of the safety valve.
An assembling method of a spring type safety valve comprises the following steps:
and 5, installing a single-action hollow hydraulic device at the position of the valve rod above the spring cover, fixing the compression nut by using a hydraulic wrench, starting the single-action hollow hydraulic device to enable the hydraulic cylinder to rise upwards to push the compression nut to drive the valve rod, applying upward pressing force to the spring by the valve rod through the retaining ring to enable the spring to compress, completing spring pre-tightening when the thrust of the single-action hollow hydraulic device reaches pre-tightening force, and screwing the compression nut by using the hydraulic wrench after pre-tightening to complete the assembly of the safety valve.
An assembling method of a spring type safety valve comprises the following steps:
and 6, installing a single-action hollow hydraulic device at the position of the valve rod above the spring cover, fixing the compression nut by using a hydraulic wrench, starting the single-action hollow hydraulic device to enable the hydraulic cylinder to rise upwards to push the compression nut to drive the valve rod, applying upward pressing force to the spring by the valve rod through the retaining ring to enable the spring to compress, completing spring pre-tightening when the thrust of the single-action hollow hydraulic device reaches pre-tightening force, and screwing the compression nut by using the hydraulic wrench after pre-tightening to complete the assembly of the safety valve.
An assembling method of a spring type safety valve comprises the following steps:
and 5, installing a single-action hollow hydraulic device at the position of the valve rod above the spring cover, fixing the compression nut by using a hydraulic wrench, starting the single-action hollow hydraulic device to enable the hydraulic cylinder to rise upwards to push the compression nut to drive the valve rod, applying upward pressing force to the spring by the valve rod through the retaining ring to enable the spring to compress, completing spring pre-tightening when the thrust of the single-action hollow hydraulic device reaches pre-tightening force, and screwing the compression nut by using the hydraulic wrench after pre-tightening to complete the assembly of the safety valve.
The invention has the beneficial effects that:
1. according to the invention, a single-action hollow hydraulic device is arranged at the position of the valve rod above the spring cover, a nut is fixed by a hydraulic wrench, a hydraulic cylinder is lifted upwards by starting the single-action hollow hydraulic device to push the valve rod nut to drive the valve rod, the valve rod applies upward pressing force to the spring through the retaining ring to compress the spring, the spring is pre-tightened when the thrust of the single-action hollow hydraulic device reaches the pre-tightening force, and the bolt is tightened by the hydraulic wrench after the pre-tightening force is reached to complete the assembly of the safety valve. The problems that the existing spring type safety valve needs manual pre-tightening on the spring during assembly, the operation difficulty is high, and time consumption is long are solved. The invention adopts the single-action hollow hydraulic device to indirectly compress the spring, can effectively ensure the assembly efficiency of the safety valve, has simple and convenient operation and high safety, and simultaneously has certain universality in similar products: the valve which can meet the performance indexes of various subsequent tests and has stable, safe and reliable performance is assembled at one time. The assembly mode of the spring type safety valve with the single-action hollow hydraulic device has the advantages of wide application, simple method, safety and high efficiency, and is suitable for the process of pressing the spring when all safety valve valves are assembled.
2. The valve rod of the invention is provided with a stroke control ring to limit the take-off height of the valve. According to the invention, the single-action hollow hydraulic device is started to enable the hydraulic cylinder to lift upwards to push the valve rod nut to drive the valve rod, the valve rod applies upward pressing force to the spring through the retaining ring to compress the spring, and the pressing force is gradually increased until the specified spring pre-tightening force is reached to generate displacement. When the spring is completely loosened, the distance between the upper end of the stroke control ring and the lower end of the spring cover is the displacement generated when the valve rod reaches the specified spring pretightening force.
3. The hole wall of the upper spring seat, which is in contact with the valve rod, is provided with the bearing and the bearing pressure pad, so that the friction generated on the upper spring seat when the valve rod moves up and down is reduced, the phenomenon that the normal use of the safety valve is influenced due to the fact that the valve rod or the upper spring seat is blocked when the valve rod or the upper spring seat moves is avoided, and the service life of the parts is prolonged.
Drawings
FIG. 1 is a schematic structural view of the spring-loaded safety valve of embodiment 1;
in the figure: 1. a valve body; 2. a valve seat; 3. a lower adjustment loop; 4. a valve flap; 5. an upper adjusting ring; 6. a guide sleeve; 7. a cooler; 8. a stroke control loop; 9. a baffle ring; 10. a lower spring seat; 11. a spring; 12. an upper spring seat; 13. a bearing; 14. a bearing pressure pad; 15. adjusting screws; 16. a valve stem; 17. a single-acting hollow hydraulic device; 18. a compression nut; 19. a spring housing; 20. a spring valve cover assembly; 21. a seal assembly; 22. an upper adjusting ring locking bolt; 23. adjusting the ring locking bolt downwards; 24. the valve clack centre gripping circle.
Detailed Description
The technical solutions of the present invention are further described below with reference to the following examples, but the present invention is not limited thereto, and any modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Example 1
A spring-loaded safety valve comprising: spring valve cover subassembly 20, valve rod 16, cooler 7, valve body 1, disk seat 2 and seal assembly 21, spring valve cover subassembly 20, cooler 7 and valve body 1 from top to bottom connect gradually, the bottom processing of valve body 1 has the feed inlet, the processing of 1 side of valve body has the discharge gate, feed inlet inner wall fixed mounting has disk seat 2, the 21 lower extreme of seal assembly is connected with disk seat 2, and the 1 upper end of seal assembly 21 is connected with the 1 upper end of valve body, valve rod 16 runs through in spring valve cover subassembly 20 and cooler 7 and can reciprocate wherein, and the bottom of valve rod 16 is connected with seal assembly 21, spring valve cover subassembly 20 includes: the hydraulic cylinder of the single-action hollow hydraulic device 17 is connected with a valve rod 16 through the compression nut 18 and drives the valve rod 16 to move up and down through the compression nut 18, the upper spring seat 12, the spring 11, the lower spring seat 10 and the baffle ring 9 are arranged in the spring cover 19, the upper spring seat 12, the spring 11 and the lower spring seat 10 are respectively sleeved on the valve rod 16, the adjusting screw 15 is arranged between the upper end of the spring cover 19 and the valve rod 16, the upper spring seat 12 is fixedly installed with the spring cover 19 through the adjusting screw 15 and a positioning pin, the baffle ring 9 is fixedly installed at the installation position of the lower spring seat 10 on the valve rod 16, a groove matched with the baffle ring 9 is processed on the lower spring seat 10, when the valve rod 16 moves upwards, the stop ring 9 drives the lower spring seat 10 to move upwards, the upper end and the lower end of the spring 11 respectively abut against the upper spring seat 12 and the lower spring seat 10, the spring 11 is compressed or reset along with the up-and-down movement of the lower spring seat 10, and the compression nut 18 is screwed to fix the position of the valve rod 16; a stroke control ring 8 is disposed on the valve stem 16 at a position below the spring valve cover assembly 20. The seal assembly 21 includes: the valve comprises a lower adjusting ring 3, a valve clack 4, an upper adjusting ring 5 and a guide sleeve 6, wherein the guide sleeve 6 is installed with the hole wall at the upper end of a valve body 1, the valve clack 4 is installed with the valve body 1 through the guide sleeve 6, the outer wall of the guide sleeve 6 is sleeved with the upper adjusting ring 5, the upper portion of a valve seat 2 is sleeved with the lower adjusting ring 3, the upper adjusting ring 5 is connected with the valve body 1 through an upper adjusting ring locking bolt 22, and the lower adjusting ring 3 is connected with the valve body 1 through a lower adjusting ring locking bolt; the flap 4 is mounted to the guide sleeve 6 by means of a flap clamping ring 22. A bearing 13 is arranged on the hole wall of the upper spring seat 12 contacted with the valve rod 16; and a bearing pressure pad 14 is arranged at the upper end of the bearing 13 and between the upper spring seat 12 and the valve rod 16.
The assembling method comprises the following specific steps:
and 6, assembling the hydraulic pump, the connecting pipe, the oil cylinder, the single-action hollow hydraulic machine and the like into a single-action hollow hydraulic device 17, wherein the maximum stroke of the hydraulic cylinder in the single-action hollow hydraulic machine is 310mm, the running speed is 0.45mm/s, the working voltage of the hydraulic pump is 380V of a three-phase asynchronous power supply, the single-action hollow hydraulic device 17 is installed at the position of the valve rod 16 above the spring cover 19, the compression nut 18 is fixed by a hydraulic wrench, the hydraulic cylinder is lifted upwards by starting the single-action hollow hydraulic device 17 to push the compression nut 18 to drive the valve rod 16, the valve rod 16 applies upward pressing force to the spring 11 through the retaining ring 9 to compress the spring 11, the spring 11 is pre-tightened when the thrust of the single-action hollow hydraulic device 17 reaches the pre-tightening force, and the compression nut 18 is screwed by the hydraulic wrench after the pre-tightening to complete the assembly of the safety valve.
When the steam pressure under the valve flap 4 of the safety valve exceeds the pressing force of the spring 11, the valve flap 4 is pushed open. After the valve flap 4 is pushed open, the exhaust steam acts on the valve flap clamping ring 24 due to the rebound of the lower adjusting ring 3, so that the valve is opened rapidly. As the valve clack 4 moves upwards, steam impacts the upper adjusting ring 5, the steam discharging direction tends to be vertical and downward, the reaction force generated by the steam discharging pushes the valve clack 4 upwards, the valve clack 4 is kept at a sufficient lifting height within a certain pressure range, the steam is continuously discharged along with the opening of the safety valve, and the steam pressure in the system is gradually reduced. The force of the spring 11 will now overcome the reaction force with the steam pressure and exhaust on the flap 4, thereby closing the safety valve.
The spring type safety valve is a sealing surface consisting of a valve clack 4 and a valve seat 2, the valve clack 4 is connected with a valve rod 16, the total displacement of the valve rod 16 meets the requirement of the valve from closing to full opening, and the setting pressure of the safety valve is mainly adjusted by changing the pressure of a spring 11 through a single-action hollow hydraulic device 17. The lower adjusting ring 3 is adjusted to obtain a complete take-off action of the valve, and the upper adjusting ring 5 is used for adjusting the recoil pressure. The recoil pressure is too low, and the valve is kept open for a longer time; too high a recoil pressure will cause the valve to continuously bounce and close, creating chatter that can damage the valve and also reduce the discharge capacity of the valve. The optimal position of the upper adjustment ring 5 enables the valve to reach full stroke.
The exhaust volume of the safety valve can be reduced by lifting the upper adjusting ring 5, and the recoil pressure of the safety valve is improved; the reduction of the upper adjusting ring 5 can increase the exhaust volume of the safety valve and reduce the recoil pressure of the safety valve. The position of the upper adjusting ring 5 is adjusted to actually change the reaction force of the steam on the valve clack 4. The upper adjusting ring 5 moves downwards, so that the reaction force of steam to the valve clack 4 is increased, the safety valve is not easy to return to the seat, and the pressure of returning to the seat can be reduced. The adjustment of the upper adjustment ring 5 must be coordinated with a small adjustment of the lower adjustment ring 3 to enable operation of the safety valve. The valve can be opened quickly by lifting the lower adjusting ring 3, and the discharge amount of the valve is increased; lowering the lower regulator ring 5 reduces the amount of steam emitted and if the lower regulator ring 3 is moved too low, the valve will be in a continuously closed position.
A stroke control ring 8 is arranged on the valve rod so as to limit the jump height of the valve. According to the invention, the single-action hollow hydraulic device 17 is started to enable the hydraulic cylinder to rise upwards to push the compression nut 18 to drive the valve rod 16, the valve rod 16 applies upward pressing force to the spring 11 through the retaining ring 9 to compress the spring 11, the pressing force is gradually increased until the specified pre-tightening force of the spring 11 is reached, and the valve rod 16 generates displacement. When the spring 11 is completely relaxed, the distance between the upper end of the travel control ring 8 and the lower end of the spring cover 19 is the displacement of the valve rod 16 when a predetermined spring preload is reached.
According to the invention, the spring 11 is pre-tightened by using the single-acting hollow hydraulic device 17, so that the problems of large operation difficulty and long time consumption caused by the fact that the spring needs to be pre-tightened manually during assembly of the conventional spring type safety valve are solved. The invention adopts the single-action hollow hydraulic device to indirectly compress the spring, can effectively ensure the assembly efficiency of the safety valve, has simple and convenient operation and high safety, and simultaneously has certain universality in similar products: the valve which can meet the performance indexes of various subsequent tests and has stable, safe and reliable performance is assembled at one time. The assembly mode of the spring type safety valve with the single-action hollow hydraulic device has the advantages of wide application, simple method, safety and high efficiency, and is suitable for the process of pressing the spring when all safety valve valves are assembled.
Example 2
A spring-loaded safety valve comprising: spring valve cover subassembly 20, valve rod 16, cooler 7, valve body 1, disk seat 2 and seal assembly 21, spring valve cover subassembly 20, cooler 7 and valve body 1 from top to bottom connect gradually, the bottom processing of valve body 1 has the feed inlet, the processing of 1 side of valve body has the discharge gate, feed inlet inner wall fixed mounting has disk seat 2, the 21 lower extreme of seal assembly is connected with disk seat 2, and the 1 upper end of seal assembly 21 is connected with the 1 upper end of valve body, valve rod 16 runs through in spring valve cover subassembly 20 and cooler 7 and can reciprocate wherein, and the bottom of valve rod 16 is connected with seal assembly 21, spring valve cover subassembly 20 includes: the hydraulic cylinder of the single-action hollow hydraulic device 17 is connected with a valve rod 16 through the compression nut 18 and drives the valve rod 16 to move up and down through the compression nut 18, the upper spring seat 12, the spring 11, the lower spring seat 10 and the baffle ring 9 are arranged in the spring cover 19, the upper spring seat 12, the spring 11 and the lower spring seat 10 are respectively sleeved on the valve rod 16, the adjusting screw 15 is arranged between the upper end of the spring cover 19 and the valve rod 16, the upper spring seat 12 is fixedly installed with the spring cover 19 through the adjusting screw 15 and a positioning pin, the baffle ring 9 is fixedly installed at the installation position of the lower spring seat 10 on the valve rod 16, a groove matched with the baffle ring 9 is processed on the lower spring seat 10, when the valve rod 16 moves upwards, the stop ring 9 drives the lower spring seat 10 to move upwards, the upper end and the lower end of the spring 11 respectively abut against the upper spring seat 12 and the lower spring seat 10, the spring 11 is compressed or reset along with the up-and-down movement of the lower spring seat 10, and the compression nut 18 is screwed to fix the position of the valve rod 16; a stroke control ring 8 is disposed on the valve stem 16 at a position below the spring valve cover assembly 20. The seal assembly 21 includes: the valve comprises a lower adjusting ring 3, a valve clack 4, an upper adjusting ring 5 and a guide sleeve 6, wherein the guide sleeve 6 is installed with the hole wall at the upper end of a valve body 1, the valve clack 4 is installed with the valve body 1 through the guide sleeve 6, the outer wall of the guide sleeve 6 is sleeved with the upper adjusting ring 5, the upper portion of a valve seat 2 is sleeved with the lower adjusting ring 3, the upper adjusting ring 5 is connected with the valve body 1 through an upper adjusting ring locking bolt 22, and the lower adjusting ring 3 is connected with the valve body 1 through a lower adjusting ring locking bolt; the flap 4 is mounted to the guide sleeve 6 by means of a flap clamping ring 22.
The assembling method comprises the following specific steps:
and 6, assembling the hydraulic pump, the connecting pipe, the oil cylinder, the single-action hollow hydraulic machine and the like into a single-action hollow hydraulic device 17, wherein the maximum stroke of the hydraulic cylinder in the single-action hollow hydraulic machine is 310mm, the running speed is 0.45mm/s, the working voltage of the hydraulic pump is 380V of a three-phase asynchronous power supply, the single-action hollow hydraulic device 17 is installed at the position of the valve rod 16 above the spring cover 19, the compression nut 18 is fixed by a hydraulic wrench, the hydraulic cylinder is lifted upwards by starting the single-action hollow hydraulic device 17 to push the compression nut 18 to drive the valve rod 16, the valve rod 16 applies upward pressing force to the spring 11 through the retaining ring 9 to compress the spring 11, the spring 11 is pre-tightened when the thrust of the single-action hollow hydraulic device 17 reaches the pre-tightening force, and the compression nut 18 is screwed by the hydraulic wrench after the pre-tightening to complete the assembly of the safety valve.
When the steam pressure under the valve flap 4 of the safety valve exceeds the pressing force of the spring 11, the valve flap 4 is pushed open. After the valve flap 4 is pushed open, the exhaust steam acts on the valve flap clamping ring 24 due to the rebound of the lower adjusting ring 3, so that the valve is opened rapidly. As the valve clack 4 moves upwards, steam impacts the upper adjusting ring 5, the steam discharging direction tends to be vertical and downward, the reaction force generated by the steam discharging pushes the valve clack 4 upwards, the valve clack 4 is kept at a sufficient lifting height within a certain pressure range, the steam is continuously discharged along with the opening of the safety valve, and the steam pressure in the system is gradually reduced. The force of the spring 11 will now overcome the reaction force with the steam pressure and exhaust on the flap 4, thereby closing the safety valve.
A stroke control ring 8 is arranged on the valve rod so as to limit the jump height of the valve. According to the invention, the single-action hollow hydraulic device 17 is started to enable the hydraulic cylinder to rise upwards to push the compression nut 18 to drive the valve rod 16, the valve rod 16 applies upward pressing force to the spring 11 through the retaining ring 9 to compress the spring 11, the pressing force is gradually increased until the specified pre-tightening force of the spring 11 is reached, and the valve rod 16 generates displacement. When the spring 11 is completely relaxed, the distance between the upper end of the travel control ring 8 and the lower end of the spring cover 19 is the displacement of the valve rod 16 when a predetermined spring preload is reached.
According to the invention, the spring 11 is pre-tightened by using the single-acting hollow hydraulic device 17, so that the problems of large operation difficulty and long time consumption caused by the fact that the spring needs to be pre-tightened manually during assembly of the conventional spring type safety valve are solved. The invention adopts the single-action hollow hydraulic device to indirectly compress the spring, can effectively ensure the assembly efficiency of the safety valve, has simple and convenient operation and high safety, and simultaneously has certain universality in similar products: the valve which can meet the performance indexes of various subsequent tests and has stable, safe and reliable performance is assembled at one time. The assembly mode of the spring type safety valve with the single-action hollow hydraulic device has the advantages of wide application, simple method, safety and high efficiency, and is suitable for the process of pressing the spring when all safety valve valves are assembled.
Example 3
A spring-loaded safety valve comprising: spring valve cover subassembly 20, valve rod 16, cooler 7, valve body 1, disk seat 2 and seal assembly 21, spring valve cover subassembly 20, cooler 7 and valve body 1 from top to bottom connect gradually, the bottom processing of valve body 1 has the feed inlet, the processing of 1 side of valve body has the discharge gate, feed inlet inner wall fixed mounting has disk seat 2, the 21 lower extreme of seal assembly is connected with disk seat 2, and the 1 upper end of seal assembly 21 is connected with the 1 upper end of valve body, valve rod 16 runs through in spring valve cover subassembly 20 and cooler 7 and can reciprocate wherein, and the bottom of valve rod 16 is connected with seal assembly 21, spring valve cover subassembly 20 includes: the hydraulic cylinder of the single-action hollow hydraulic device 17 is connected with a valve rod 16 through the compression nut 18 and drives the valve rod 16 to move up and down through the compression nut 18, the upper spring seat 12, the spring 11, the lower spring seat 10 and the baffle ring 9 are arranged in the spring cover 19, the upper spring seat 12, the spring 11 and the lower spring seat 10 are respectively sleeved on the valve rod 16, the adjusting screw 15 is arranged between the upper end of the spring cover 19 and the valve rod 16, the upper spring seat 12 is fixedly installed with the spring cover 19 through the adjusting screw 15 and a positioning pin, the baffle ring 9 is fixedly installed at the installation position of the lower spring seat 10 on the valve rod 16, a groove matched with the baffle ring 9 is processed on the lower spring seat 10, when the valve rod 16 moves upwards, the stop ring 9 drives the lower spring seat 10 to move upwards, the upper end and the lower end of the spring 11 respectively abut against the upper spring seat 12 and the lower spring seat 10, the spring 11 is compressed or reset along with the up-and-down movement of the lower spring seat 10, and the compression nut 18 is screwed to fix the position of the valve rod 16; a stroke control ring 8 is disposed on the valve stem 16 at a position below the spring valve cover assembly 20.
The assembling method comprises the following specific steps:
and 5, assembling the hydraulic pump, the connecting pipe, the oil cylinder, the single-action hollow hydraulic machine and the like into a single-action hollow hydraulic device 17, wherein the maximum stroke of the hydraulic cylinder in the single-action hollow hydraulic machine is 310mm, the running speed is 0.45mm/s, the working voltage of the hydraulic pump is 380V of a three-phase asynchronous power supply, the single-action hollow hydraulic device 17 is installed at the position of the valve rod 16 above the spring cover 19, the compression nut 18 is fixed by a hydraulic wrench, the hydraulic cylinder is lifted upwards by starting the single-action hollow hydraulic device 17 to push the compression nut 18 to drive the valve rod 16, the valve rod 16 applies upward pressing force to the spring 11 through the retaining ring 9 to compress the spring 11, the spring 11 is pre-tightened when the thrust of the single-action hollow hydraulic device 17 reaches the pre-tightening force, and the compression nut 18 is screwed by the hydraulic wrench after the pre-tightening to complete the assembly of the safety valve.
When the steam pressure under the sealing assembly 21 of the safety valve exceeds the pressing force of the spring 11, the sealing assembly 21 is opened, and the feeding hole and the discharging hole on the valve body 1 form a pressure relief channel to release high pressure.
According to the invention, the spring 11 is pre-tightened by using the single-acting hollow hydraulic device 17, so that the problems of large operation difficulty and long time consumption caused by the fact that the spring needs to be pre-tightened manually during assembly of the conventional spring type safety valve are solved. The invention adopts the single-action hollow hydraulic device to indirectly compress the spring, can effectively ensure the assembly efficiency of the safety valve, has simple and convenient operation and high safety, and simultaneously has certain universality in similar products: the valve which can meet the performance indexes of various subsequent tests and has stable, safe and reliable performance is assembled at one time. The assembly mode of the spring type safety valve with the single-action hollow hydraulic device has the advantages of wide application, simple method, safety and high efficiency, and is suitable for the process of pressing the spring when all safety valve valves are assembled.
Example 4
A spring-loaded safety valve comprising: spring valve cover subassembly 20, valve rod 16, cooler 7, valve body 1, disk seat 2 and seal assembly 21, spring valve cover subassembly 20, cooler 7 and valve body 1 from top to bottom connect gradually, the bottom processing of valve body 1 has the feed inlet, the processing of 1 side of valve body has the discharge gate, feed inlet inner wall fixed mounting has disk seat 2, the 21 lower extreme of seal assembly is connected with disk seat 2, and the 1 upper end of seal assembly 21 is connected with the 1 upper end of valve body, valve rod 16 runs through in spring valve cover subassembly 20 and cooler 7 and can reciprocate wherein, and the bottom of valve rod 16 is connected with seal assembly 21, spring valve cover subassembly 20 includes: the hydraulic cylinder of the single-action hollow hydraulic device 17 is connected with a valve rod 16 through the compression nut 18 and drives the valve rod 16 to move up and down through the compression nut 18, the upper spring seat 12, the spring 11, the lower spring seat 10 and the baffle ring 9 are arranged in the spring cover 19, the upper spring seat 12, the spring 11 and the lower spring seat 10 are respectively sleeved on the valve rod 16, the adjusting screw 15 is arranged between the upper end of the spring cover 19 and the valve rod 16, the upper spring seat 12 is fixedly installed with the spring cover 19 through the adjusting screw 15 and a positioning pin, the baffle ring 9 is fixedly installed at the installation position of the lower spring seat 10 on the valve rod 16, a groove matched with the baffle ring 9 is processed on the lower spring seat 10, when the valve rod 16 moves upwards, the stop ring 9 drives the lower spring seat 10 to move upwards, the upper end and the lower end of the spring 11 respectively support against the upper spring seat 12 and the lower spring seat 10, the spring 11 is compressed or reset along with the up-and-down movement of the lower spring seat 10, and the compression nut 18 is screwed to fix the position of the valve rod 16.
The assembling method comprises the following specific steps:
and 5, assembling the hydraulic pump, the connecting pipe, the oil cylinder, the single-action hollow hydraulic machine and the like into a single-action hollow hydraulic device 17, wherein the maximum stroke of the hydraulic cylinder in the single-action hollow hydraulic machine is 310mm, the running speed is 0.45mm/s, the working voltage of the hydraulic pump is 380V of a three-phase asynchronous power supply, the single-action hollow hydraulic device 17 is installed at the position of the valve rod 16 above the spring cover 19, the compression nut 18 is fixed by a hydraulic wrench, the hydraulic cylinder is lifted upwards by starting the single-action hollow hydraulic device 17 to push the compression nut 18 to drive the valve rod 16, the valve rod 16 applies upward pressing force to the spring 11 through the retaining ring 9 to compress the spring 11, the spring 11 is pre-tightened when the thrust of the single-action hollow hydraulic device 17 reaches the pre-tightening force, and the compression nut 18 is screwed by the hydraulic wrench after the pre-tightening to complete the assembly of the safety valve.
When the steam pressure under the sealing assembly 21 of the safety valve exceeds the pressing force of the spring 11, the sealing assembly 21 is opened, and the feeding hole and the discharging hole on the valve body 1 form a pressure relief channel to release high pressure.
According to the invention, the spring 11 is pre-tightened by using the single-acting hollow hydraulic device 17, so that the problems of large operation difficulty and long time consumption caused by the fact that the spring needs to be pre-tightened manually during assembly of the conventional spring type safety valve are solved. The invention adopts the single-action hollow hydraulic device to indirectly compress the spring, can effectively ensure the assembly efficiency of the safety valve, has simple and convenient operation and high safety, and simultaneously has certain universality in similar products: the valve which can meet the performance indexes of various subsequent tests and has stable, safe and reliable performance is assembled at one time. The assembly mode of the spring type safety valve with the single-action hollow hydraulic device has the advantages of wide application, simple method, safety and high efficiency, and is suitable for the process of pressing the spring when all safety valve valves are assembled.
Claims (7)
1. A spring-loaded safety valve comprising: spring valve cover subassembly (20), valve rod (16), cooler (7), valve body (1), disk seat (2) and seal assembly (21), spring valve cover subassembly (20), cooler (7) and valve body (1) from top to bottom connect gradually, the bottom processing of valve body (1) has the feed inlet, valve body (1) side processing has the discharge gate, feed inlet inner wall fixed mounting has disk seat (2), seal assembly (21) lower extreme is connected with disk seat (2), and seal assembly (21) upper end is connected with valve body (1) upper end, valve rod (16) run through in spring valve cover subassembly (20) and cooler (7) and can reciprocate wherein, and the bottom and the seal assembly (21) of valve rod (16) are connected, its characterized in that, spring valve cover subassembly (20) includes: the hydraulic valve comprises a spring cover (19), a compression nut (18), a single-action hollow hydraulic device (17), an adjusting screw (15), an upper spring seat (12), a spring (11), a lower spring seat (10) and a retaining ring (9), wherein the single-action hollow hydraulic device (17) is fixed at the upper end of the spring cover (19), a hydraulic cylinder of the single-action hollow hydraulic device (17) is connected with the valve rod (16) through the compression nut (18) and drives the valve rod (16) to move up and down through the compression nut (18), the upper spring seat (12), the spring (11), the lower spring seat (10) and the retaining ring (9) are arranged in the spring cover (19), the upper spring seat (12), the spring (11) and the lower spring seat (10) are respectively sleeved on the valve rod (16), the adjusting screw (15) is arranged between the upper end of the spring cover (19) and the valve rod (16), the upper spring seat (12) is fixedly installed with the spring cover (19) through the adjusting screw (15) and a positioning pin, fixed mounting has fender ring (9) on the lower spring holder (10) mounted position on valve rod (16), processing has the recess that matches with fender ring (9) on lower spring holder (10), and when valve rod (16) rebound, keep off spring holder (10) rebound under ring (9) drive, spring holder (12) and lower spring holder (10) are supported respectively to the upper and lower both ends of spring (11), and spring (11) compress or reset along with the reciprocating of lower spring holder (10), screws up the position of gland nut (18) fixed valve rod (16), bearing (13) have been arranged on the pore wall of going up spring holder (12) and valve rod (16) contact, bearing (13) upper end, upward spring holder (12) and valve rod (16) are arranged between and are pressed and are filled up (14).
2. A spring-loaded safety valve according to claim 1, characterized in that a stroke control ring (8) is arranged on the valve stem (16) in a position below the spring valve cap assembly (20).
3. A spring-loaded safety valve according to claim 2, wherein the sealing assembly (21) comprises: adjusting ring (3), valve clack (4) down, go up adjusting ring (5) and uide bushing (6), uide bushing (6) is established the installation with the pore wall of valve body (1) upper end, installation is established through uide bushing (6) and valve body (1) in valve clack (4), the outer wall cover of uide bushing (6) is equipped with adjusting ring (5), the upper portion cover of disk seat (2) is equipped with down adjusting ring (3), it is connected with valve body (1) through last adjusting ring locking bolt (22) to go up adjusting ring (5), down adjusting ring (3) are connected with valve body (1) through adjusting ring locking bolt down.
4. A spring-loaded safety valve according to claim 3, characterized in that the flap (4) is mounted to the guide sleeve (6) by means of a flap clamping ring (24).
5. A method of assembling the spring-loaded safety valve of claim 1, comprising the steps of:
step 1, assembling a sealing assembly (21) with a valve body (1) and a valve seat (2);
step 2, the valve rod (16) is arranged in the sealing component (21);
step 3, sequentially assembling the cooler (7), the baffle ring (9), the lower spring seat (10), the spring (11), the upper spring seat (12), the bearing (13) and the bearing pressure pad (14);
step 4, screwing the adjusting screw (15) into the spring cover (19) and penetrating the valve rod (16) into the spring cover (19);
and 5, installing a single-action hollow hydraulic device (17) at the position of a valve rod (16) above the spring cover (19), fixing a compression nut (18) by using a hydraulic wrench, starting the single-action hollow hydraulic device (17) to enable a hydraulic cylinder to rise upwards to push the compression nut (18) to drive the valve rod (16), applying upward pressing force on the spring (11) by the valve rod (16) through a baffle ring (9) to enable the spring (11) to be compressed, completing pre-tightening of the spring (11) when the thrust of the single-action hollow hydraulic device (17) reaches pre-tightening force, and tightening the compression nut (18) by using the hydraulic wrench after pre-tightening to complete assembly of the safety valve.
6. A method of assembling the spring-loaded safety valve of claim 2, comprising the steps of:
step 1, assembling a sealing assembly (21) with a valve body (1) and a valve seat (2);
step 2, installing the stroke control ring (8) on the valve rod (16), and installing the valve rod (16) in the sealing assembly (21);
step 3, sequentially assembling the cooler (7), the baffle ring (9), the lower spring seat (10), the spring (11), the upper spring seat (12), the bearing (13) and the bearing pressure pad (14);
step 4, screwing the adjusting screw (15) into the spring cover (19) and penetrating the valve rod (16) into the spring cover (19);
and 5, installing a single-action hollow hydraulic device (17) at the position of a valve rod (16) above the spring cover (19), fixing a compression nut (18) by using a hydraulic wrench, starting the single-action hollow hydraulic device (17) to enable a hydraulic cylinder to rise upwards to push the compression nut (18) to drive the valve rod (16), applying upward pressing force on the spring (11) by the valve rod (16) through a baffle ring (9) to enable the spring (11) to be compressed, completing pre-tightening of the spring (11) when the thrust of the single-action hollow hydraulic device (17) reaches pre-tightening force, and tightening the compression nut (18) by using the hydraulic wrench after pre-tightening to complete assembly of the safety valve.
7. A method of assembling the spring-loaded safety valve of claim 3, comprising the steps of:
step 1, screwing a lower adjusting ring (3) into an external thread of a valve seat (2);
step 2, assembling the valve clack (4), the guide sleeve (6) and the upper adjusting ring (5) and installing the assembled valve clack, guide sleeve and upper adjusting ring into the valve body (1);
step 3, installing the stroke control ring (8) on the valve rod (16), and installing the valve rod (16) in the sealing assembly (21);
step 4, sequentially assembling the cooler (7), the baffle ring (9), the lower spring seat (10), the spring (11), the upper spring seat (12), the bearing (13) and the bearing pressure pad (14);
step 5, screwing the adjusting screw (15) into the spring cover (19) and penetrating the valve rod (16) into the spring cover (19);
and 6, installing a single-action hollow hydraulic device (17) at the position of a valve rod (16) above the spring cover (19), fixing a compression nut (18) by using a hydraulic wrench, starting the single-action hollow hydraulic device (17) to enable a hydraulic cylinder to rise upwards to push the compression nut (18) to drive the valve rod (16), applying upward pressing force on the spring (11) by the valve rod (16) through a baffle ring (9) to enable the spring (11) to be compressed, completing pre-tightening of the spring (11) when the thrust of the single-action hollow hydraulic device (17) reaches pre-tightening force, and tightening the compression nut (18) by using the hydraulic wrench after pre-tightening to complete assembly of the safety valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110112194.4A CN112879617B (en) | 2021-01-27 | 2021-01-27 | Spring type safety valve and assembling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110112194.4A CN112879617B (en) | 2021-01-27 | 2021-01-27 | Spring type safety valve and assembling method thereof |
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| CN112879617B true CN112879617B (en) | 2021-12-10 |
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| CN113700914B (en) * | 2021-08-16 | 2022-04-12 | 哈电集团哈尔滨电站阀门有限公司 | Spring type safety valve with novel back pressure adjusting mechanism and using method |
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| CN203743536U (en) * | 2014-04-08 | 2014-07-30 | 王涛 | Electromagnetic safety valve for boiler superheater system |
| JP2015194950A (en) * | 2014-03-31 | 2015-11-05 | 株式会社ワイ・ジェー・エス． | Reduction valve |
| CN105257873A (en) * | 2015-10-14 | 2016-01-20 | 武汉锅炉集团阀门有限责任公司 | Controllable double-protection fall lift spring safety valve and boiler steam-water system |
| CN105757302A (en) * | 2016-04-29 | 2016-07-13 | 天津市友滨弹簧有限公司 | Safety valve capable of precisely regulating pressure |
| CN211624314U (en) * | 2020-01-20 | 2020-10-02 | 德州联合石油科技股份有限公司 | Hydraulic safety valve |
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- 2021-01-27 CN CN202110112194.4A patent/CN112879617B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015194950A (en) * | 2014-03-31 | 2015-11-05 | 株式会社ワイ・ジェー・エス． | Reduction valve |
| CN203743536U (en) * | 2014-04-08 | 2014-07-30 | 王涛 | Electromagnetic safety valve for boiler superheater system |
| CN105257873A (en) * | 2015-10-14 | 2016-01-20 | 武汉锅炉集团阀门有限责任公司 | Controllable double-protection fall lift spring safety valve and boiler steam-water system |
| CN105757302A (en) * | 2016-04-29 | 2016-07-13 | 天津市友滨弹簧有限公司 | Safety valve capable of precisely regulating pressure |
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