Hard-seal marine full-lift closed safety valve

Abstract

The invention discloses a hard sealing marine full-opening closed safety valve, and relates to the technical field of valves, the safety valve comprises a valve body, a valve seat, a valve clack, a guide seat, a valve rod, an elastic assembly and an adjusting assembly, the valve seat is in fastening connection with the valve body, the valve clack abuts against the valve seat, the guide seat is in fastening connection with the valve body, the valve rod is in fastening connection with the valve clack, and the valve rod is in sliding connection with the guide seat; the valve rod is sleeved with the elastic assembly, the elastic assembly is used for providing pressure for the valve clack, the adjusting assembly is connected with the valve body in a fastened mode, and the adjusting assembly is used for compensating the elastic force of the elastic assembly; when the pressure in the system is in a normal range, the valve clack of the safety valve is pressed on the valve seat by the elastic assembly; when the pressure in the system exceeds the set value of the safety valve, the force of the medium acting on the valve clack of the safety valve is increased, the pretightening force of the elastic assembly is overcome, the valve clack and the valve rod are pushed to move upwards, and the medium flows out of the gap formed between the valve clack and the valve seat until the pressure is reduced to the safety range.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a hard-sealed marine full-open and closed safety valve. Background Art

[0002] The marine safety valve is a safety device designed specifically for ships. It is mainly used to protect pressure vessels, pipelines, etc. in the ship system from excessive pressure. When the pressure in the container or pipeline is too high, the safety valve will automatically open, thereby quickly releasing the pressure to avoid equipment damage or danger.

[0003] Under normal working pressure, the spring force of the spring on the valve stem presses the valve disc tightly against the valve seat, and the valve is in a closed state. When the system pressure exceeds the set value, the force acting on the valve disc exceeds the spring force, the valve disc is pushed open, and the medium is discharged through the valve. As the pressure is released, the valve disc closes again under the action of the spring, and the valve returns to a closed state.

[0004] However, springs are usually made of metal. Over time, the lattice structure of the metal will change, resulting in a decrease in the elastic properties of the material, which requires a certain compensation for the lost elastic force of the spring. In addition, the existing safety valve opens the valve disc to relieve pressure as long as the system pressure exceeds the set value, and cannot automatically control the pressure relief flow rate according to the amount of excess pressure, which causes the valve disc to open frequently, easily aggravating the wear of the valve. Summary of the invention

[0005] The purpose of the present invention is to provide a hard-sealed marine full-open and closed safety valve to solve the problems raised in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: The present invention provides a technical solution of a hard-sealed marine fully open and closed safety valve, the safety valve comprising a valve body, a valve seat, a valve disc, a guide seat, a valve stem, an elastic component and an adjusting component, the valve seat is tightly connected to the valve body, the valve disc abuts against the valve seat, the guide seat is tightly connected to the valve body, the valve stem is tightly connected to the valve disc, the valve stem is slidably connected to the guide seat, the elastic component is sleeved on the valve stem, the elastic component is used to provide pressure for the valve disc, the adjusting component is tightly connected to the valve body, and the adjusting component is used to compensate for the elastic force of the elastic component.

[0007] When the pressure in the system is within the normal range, the valve disc of the safety valve is pressed against the valve seat by the elastic component. At this time, the valve is sealed to prevent the medium from flowing out; when the pressure in the system exceeds the set value of the safety valve, the force of the medium acting on the valve disc of the safety valve increases, overcoming the preload force of the elastic component. The guide seat is used to provide guidance for the movement of the valve stem, pushing the valve disc and the valve stem to move upward, and the medium flows out from the gap opened between the valve disc and the valve seat until the pressure drops to a safe range. When the pressure returns to below the safe value, the safety valve will automatically close; in addition, when the elastic force of the elastic component decreases during long-term use, the elastic force lost by the elastic component is compensated by the adjusting component.

[0008] Furthermore, the valve body is provided with a connection port, a pressure relief port and a protective cover, and the regulating component is located inside the protective cover.

[0009] The connection port is used to connect to the corresponding system, the pressure relief port is used to discharge excess medium, and the protective cover is used to protect the regulating component.

[0010] Furthermore, the elastic component includes an upper seat, a support spring and a lower seat, the upper seat is slidably connected to the valve stem, the upper seat abuts against the adjustment component, the lower seat is tightly connected to the valve stem, one end of the support spring abuts against the upper seat, and the other end of the support spring abuts against the lower seat.

[0011] When the system is over-pressured, the increased pressure will push the valve disc upward, thereby driving the valve stem to move upward along the guide seat. The upward-moving valve stem will drive the lower seat fixed to it to move upward, thereby compressing the support spring. The position of the upper seat is controlled by the adjusting assembly, so as to control the preload force of the support spring within a suitable range; when the system pressure returns to normal, the valve stem will move downward under the action of the elastic force of the support spring, thereby pressing the valve disc against the valve seat.

[0012] Furthermore, the adjustment component includes a movable sleeve, a driving motor and a transmission gear. The movable sleeve is slidably connected to the valve stem, the bottom end of the movable sleeve abuts against the upper seat, the driving motor is firmly connected to the inner wall of the shield, the output end of the driving motor is transmission-connected to the transmission gear, and the transmission gear is transmission-connected to the movable sleeve.

[0013] The driving motor is the main power source of the adjusting component. The driving motor outputs torque, thereby driving the transmission gear to rotate, and then transmitting power to the movable sleeve, so that the movable sleeve can move freely along the valve stem, thereby controlling the position of the upper seat; and the longer the movable sleeve moves downward, the longer the upper seat moves downward, the longer the support spring is compressed, and the greater the preload force; that is, when the elastic performance of the support spring decreases, by adjusting the distance of the movable sleeve, the elastic force lost by the support spring during long-term use can be automatically compensated, thereby keeping the preload force in a suitable range.

[0014] Furthermore, a tooth surface and an external thread are provided on the movable sleeve, and an internal thread is provided on a through hole at one end of the valve body close to the movable sleeve. The external thread is meshed with the internal thread, and the tooth surface is meshed with the transmission gear.

[0015] The tooth surface is used to transmit the power of the transmission gear to the movable sleeve, and cooperates with the internal thread on the valve body to drive the movable sleeve to move up and down. The tooth surface has a certain width to ensure that the tooth surface is always engaged with the transmission gear during adjustment.

[0016] Furthermore, a detection cavity is provided in the movable sleeve, an elastic ring is provided at one end of the movable sleeve close to the upper seat, the inner cavity of the elastic ring is filled with hydraulic oil, the elastic ring is connected with the detection cavity, the adjustment component also includes a piston, a magnetic rod and a coil, the piston is slidably connected with the detection cavity, the magnetic rod is tightly connected with the piston, the coil is wound around the periphery of the detection cavity, and the coil is externally connected to a detection power supply; During detection: the magnetic bar and the coil produce relative motion.

[0017] The elastic force of the support spring on the upper seat presses the upper seat against the bottom end of the movable sleeve, thereby applying a certain pressure to the elastic ring, so that the elastic ring is compressed and the hydraulic oil in the elastic ring is pressed into the detection chamber, thereby keeping the piston at a certain height in the detection chamber, and the magnetic rod is inserted into the coil; the detection of the elastic force of the support spring is only performed when the valve is closed. When the elastic force of the support spring decays after long-term use, the pressure of the upper seat on the elastic ring will decrease, the deformation of the elastic ring will decrease, the content of the hydraulic oil pressed into the detection chamber will decrease, the piston will move down a distance, thereby driving the magnetic rod to move down a distance, so that the magnetic rod and the coil produce relative motion, cut the magnetic lines of induction, and form an induced current. The coil is connected to the detection power supply. By detecting the size of the induced current generated on the detection coil of the power supply, the size of the attenuated elastic force of the support spring can be determined. The larger the induced current generated, the greater the attenuated elastic force of the support spring. Then, the active sleeve is driven by the driving motor to move down a corresponding distance, and the attenuated elastic force of the support spring can be automatically compensated.

[0018] Furthermore, the valve disc is provided with an active chamber, a pressure relief channel and a guide channel, and the active chamber is provided with a pressure relief assembly, which is used to guide the pressure to the pressure relief channel and the guide channel. The pressure relief channel and the guide channel are arranged alternately, and the outlet of the pressure relief channel is connected to the pressure relief port, and the outlet of the guide channel faces the valve seat.

[0019] When the system pressure exceeds the set value, the existing safety valve opens the valve disc to release the pressure, which causes the valve disc to open frequently and easily aggravates the wear of the valve. By arranging a pressure relief component on the valve disc, when the overpressure is low, the excess pressure is discharged through the pressure discharge channel, and there is no need to open the valve disc to release the pressure. When the overpressure is high, the medium is guided to the channel through the pressure relief component, and the outlet of the guide channel faces the valve seat. When the medium flows out of the outlet of the guide channel, the recoil force formed can increase the opening speed of the valve disc, thereby improving the efficiency of pressure relief.

[0020] Furthermore, the pressure relief assembly includes a movable block and a movable spring, the movable block is slidably connected to the movable chamber, one end of the movable spring is firmly connected to the movable block, and the other end of the movable spring is firmly connected to the inner wall of the movable chamber, and an annular flow channel is provided on the movable block, which is connected to the connecting port; When the overpressure is low: the annular flow channel is connected to the pressure relief flow channel; When the overpressure is high: the annular flow channel is connected to the guide flow channel.

[0021] The preload force set by the support spring is slightly larger than the standard pressure. In this way, when the medium pressure exceeds the standard pressure but is less than the preload force, the pressure of the medium will push the movable block to move upward a short distance, and the movable spring will be compressed, so that the annular flow channel is connected to the pressure discharge flow channel, and the excess pressure is discharged through the pressure discharge flow channel. At this time, it is in a small flow pressure relief, and there is no need to open the valve disc; when the medium pressure exceeds the preload force, the pressure of the medium will push the movable block to move upward a long distance, so that the annular flow channel is connected to the guide flow channel, so that the medium flows out from the outlet of the guide flow channel, forming a recoil force on the valve disc, thereby increasing the opening speed of the valve disc. At this time, the pressure is discharged from the gap between the valve disc and the valve seat, which is in a large flow pressure relief; that is, through the staggered arrangement of the pressure discharge flow channel and the guide flow channel, the combination of small flow pressure relief and large flow pressure relief is realized, thereby improving the efficiency during pressure relief and increasing the service life of the valve.

[0022] Furthermore, the valve seat and the valve disc are made of stainless steel.

[0023] The valve seat and valve disc made of stainless steel have excellent corrosion resistance, and are stable in high temperature environments and are not easy to deform or fail. In addition, stainless steel has high mechanical strength and can withstand greater pressure and load.

[0024] Compared with the prior art, the present invention has the following beneficial effects: 1. By arranging a deformable elastic ring on the contact surface of the movable sleeve and the upper seat, when the elastic force of the support spring decays after long-term use, the pressure of the upper seat on the elastic ring will decrease, the deformation of the elastic ring will decrease, the content of the hydraulic oil pressed into the detection chamber will decrease, the piston will move down a certain distance, thereby driving the magnetic rod to move down a certain distance, so that the magnetic rod and the coil produce relative motion, cutting the magnetic flux lines, thereby forming an induced current. By detecting the size of the induced current generated on the power supply detection coil, the size of the attenuated elastic force of the support spring can be determined, and then the movable sleeve is driven by the driving motor to move down a corresponding distance, so that the attenuated elastic force of the support spring can be automatically compensated.

[0025] 2. Through the staggered arrangement of the pressure relief flow channel and the guide flow channel, and the corresponding pressure relief components, when the overpressure is low, the excess pressure is discharged through the pressure relief flow channel, and there is no need to open the valve disc for pressure relief, thereby reducing the wear of the valve disc; when the overpressure is high, the medium is guided to the flow channel through the pressure relief component. When the medium flows out from the outlet of the guide flow channel, the recoil force formed can increase the opening speed of the valve disc, thereby improving the efficiency of pressure relief, thereby realizing the combination of small flow pressure relief and large flow pressure relief, thereby improving the efficiency of pressure relief and increasing the service life of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial cross-sectional view of the present invention; Figure 3 It is a partial cross-sectional view of the valve disc; Figure 4 for Figure 3 A local enlarged view of point A; Figure 5 is a schematic diagram of the adjustment component; Figure 6 for Figure 5 A partial enlarged view of point B; Figure 7 It is a partial cross-sectional view of the movable sleeve; Figure 8 for Figure 7 A partial enlarged view of point C.

[0027] In the figure: 1. valve body; 11. connection port; 12. pressure relief port; 13. protective cover; 14. internal thread; 2. valve seat; 3. valve disc; 31. movable chamber; 32. pressure relief channel; 33. guide channel; 4. guide seat; 5. valve stem; 6. elastic component; 61. upper seat; 62. support spring; 63. lower seat; 7. adjustment component; 71. movable sleeve; 711. tooth surface; 712. external thread; 713. detection chamber; 72. drive motor; 73. transmission gear; 74. elastic ring; 75. piston; 76. magnetic rod; 77. coil; 8. pressure relief component; 81. movable block; 811. annular channel; 82. movable spring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example: Figure 1-Figure 8 As shown, the present invention provides a technical solution for a hard-sealed marine full-open closed safety valve, the safety valve comprising a valve body 1, a valve seat 2, a valve disc 3, a guide seat 4, a valve stem 5, an elastic component 6 and an adjusting component 7, the valve seat 2 is tightly connected to the valve body 1, the valve disc 3 abuts against the valve seat 2, the guide seat 4 is tightly connected to the valve body 1, the valve stem 5 is tightly connected to the valve disc 3, the valve stem 5 is slidably connected to the guide seat 4, the elastic component 6 is sleeved on the valve stem 5, the elastic component 6 is used to provide pressure for the valve disc 3, the adjusting component 7 is tightly connected to the valve body 1, and the adjusting component 7 is used to compensate for the elastic force of the elastic component 6.

[0030] When the pressure in the system is within the normal range, the valve disc 3 of the safety valve is pressed against the valve seat 2 by the elastic component 6. At this time, the valve is sealed to prevent the medium from flowing out; when the pressure in the system exceeds the set value of the safety valve, the force of the medium acting on the valve disc 3 of the safety valve increases, overcoming the preload force of the elastic component 6. The guide seat 4 is used to provide guidance for the movement of the valve stem 5, pushing the valve disc 3 and the valve stem 5 to move upward, and the medium flows out from the gap opened between the valve disc 3 and the valve seat 2 until the pressure drops to a safe range. When the pressure returns to below the safe value, the safety valve will automatically close; in addition, when the elastic force of the elastic component 6 decreases during long-term use, the elastic force lost by the elastic component 6 is compensated by the adjusting component 7.

[0031] The valve body 1 is provided with a connecting port 11 , a pressure relief port 12 and a protective cover 13 , and the regulating assembly 7 is located inside the protective cover 13 .

[0032] The connection port 11 is used to connect to a corresponding system, the pressure relief port 12 is used to discharge excess medium, and the protective cover 13 is used to protect the adjustment component 7 .

[0033] The elastic component 6 includes an upper seat 61, a support spring 62 and a lower seat 63. The upper seat 61 is slidably connected to the valve stem 5, the upper seat 61 abuts against the adjustment component 7, the lower seat 63 is tightly connected to the valve stem 5, one end of the support spring 62 abuts against the upper seat 61, and the other end of the support spring 62 abuts against the lower seat 63.

[0034] When the system is over-pressured, the increased pressure will push the valve disc 3 to move upward, thereby driving the valve stem 5 to move upward along the guide seat 4. The upward-moving valve stem 5 will drive the lower seat 63 fixed thereto to move upward, thereby compressing the support spring 62. The position of the upper seat 61 is controlled by the adjusting assembly 7, thereby controlling the preload force of the support spring 62 within a suitable range; when the system pressure returns to normal, under the action of the elastic force of the support spring 62, the valve stem 5 will move downward, thereby pressing the valve disc 3 against the valve seat 2.

[0035] The adjusting assembly 7 includes a movable sleeve 71, a driving motor 72 and a transmission gear 73. The movable sleeve 71 is slidably connected to the valve stem 5, the bottom end of the movable sleeve 71 abuts against the upper seat 61, the driving motor 72 is firmly connected to the inner wall of the shield 13, the output end of the driving motor 72 is transmission-connected to the transmission gear 73, and the transmission gear 73 is transmission-connected to the movable sleeve 71.

[0036] The driving motor 72 is the main power source of the adjusting component 7. The driving motor 72 outputs torque, thereby driving the transmission gear 73 to rotate, and then transmitting power to the movable sleeve 71, so that the movable sleeve 71 can move freely along the valve stem 5, thereby controlling the position of the upper seat 61; and the longer the movable sleeve 71 moves downward, the longer the upper seat 61 moves downward, the longer the support spring 62 is compressed, and the greater the preload force; that is, when the elastic performance of the support spring 62 decreases, by adjusting the distance of the movable sleeve 71, the elastic force lost by the support spring 62 during long-term use can be automatically compensated, thereby keeping the preload force in a suitable range.

[0037] The movable sleeve 71 is provided with a tooth surface 711 and an external thread 712 . An internal thread 14 is provided on a through hole at one end of the valve body 1 close to the movable sleeve 71 . The external thread 712 meshes with the internal thread 14 , and the tooth surface 711 meshes with the transmission gear 73 .

[0038] The tooth surface 711 is used to transmit the power of the transmission gear 73 to the movable sleeve 71, and cooperates with the external thread 712 and the internal thread 14 on the valve body 1 to drive the movable sleeve 71 to move up and down. The tooth surface 711 has a certain width to ensure that the tooth surface 711 is always engaged with the transmission gear 73 during adjustment.

[0039] A detection chamber 713 is provided in the movable sleeve 71, and an elastic ring 74 is provided at one end of the movable sleeve 71 close to the upper seat 61. The inner cavity of the elastic ring 74 is filled with hydraulic oil, and the elastic ring 74 is connected with the detection chamber 713. The adjustment component 7 also includes a piston 75, a magnetic rod 76 and a coil 77. The piston 75 is slidably connected to the detection chamber 713, the magnetic rod 76 is tightly connected to the piston 75, and the coil 77 is wound around the periphery of the detection chamber 713. The coil 77 is externally connected to a detection power supply; During detection: the magnetic bar 76 and the coil 77 produce relative motion.

[0040] The elastic force of the support spring 62 on the upper seat 61 presses the upper seat 61 against the bottom end of the movable sleeve 71, thereby applying a certain pressure to the elastic ring 74, so that the elastic ring 74 is compressed and the hydraulic oil in the elastic ring 74 is pressed into the detection chamber 713, so that the piston 75 is kept at a certain height in the detection chamber 713. At this time, the magnetic rod 76 is inserted into the coil 77; the detection of the elastic force of the support spring 62 is only performed when the valve is closed. When the elastic force of the support spring 62 decays after long-term use, the pressure of the upper seat 61 on the elastic ring 74 will decrease, the deformation of the elastic ring 74 will decrease, and the piston 75 will be pressed into the detection chamber. The hydraulic oil content in 713 will decrease, and the piston 75 will move down a certain distance, thereby driving the magnetic rod 76 to move down a certain distance, so that the magnetic rod 76 and the coil 77 will produce relative movement, cutting the magnetic flux lines, thereby forming an induced current, and the coil 77 is connected to the detection power supply. By detecting the size of the induced current generated on the power supply detection coil 77, the size of the attenuated elastic force of the support spring 62 can be determined. The larger the induced current generated, the larger the attenuated elastic force of the support spring. Then, by driving the movable sleeve 71 downward by a corresponding distance by the driving motor 72, the attenuated elastic force of the support spring 62 can be automatically compensated.

[0041] An active chamber 31, a pressure relief channel 32 and a guide channel 33 are provided on the valve disc 3. A pressure relief assembly 8 is provided in the active chamber 31. The pressure relief assembly 8 is used to guide the pressure to the pressure relief channel 32 and the guide channel 33. The pressure relief channel 32 and the guide channel 33 are arranged alternately. The outlet of the pressure relief channel 32 is connected to the pressure relief port 12, and the outlet of the guide channel 33 faces the valve seat 2.

[0042] When the system pressure exceeds the set value, the existing safety valve opens the valve flap 3 to release the pressure, which causes the valve flap 3 to open frequently and easily aggravates the wear of the valve. By arranging a pressure relief component 8 on the valve flap 3, when the overpressure is low, the excess pressure is discharged through the pressure discharge channel 32, and there is no need to open the valve flap 3 to release the pressure. When the overpressure is high, the medium is guided to the channel 33 through the pressure relief component 8, and the outlet of the guide channel 33 is toward the valve seat 2. When the medium flows out from the outlet of the guide channel 33, the recoil force formed can increase the opening speed of the valve flap 3, thereby improving the efficiency of pressure relief.

[0043] The pressure relief assembly 8 includes a movable block 81 and a movable spring 82. The movable block 81 is slidably connected to the movable chamber 31. One end of the movable spring 82 is firmly connected to the movable block 81. The other end of the movable spring 82 is firmly connected to the inner wall of the movable chamber 31. The movable block 81 is provided with an annular flow channel 811, which is connected to the connecting port 11. When the overpressure is low: the annular flow channel 811 is connected to the pressure relief flow channel 32; When the overpressure is high: the annular flow channel 811 is connected to the guide flow channel 33 .

[0044] The preload force set by the support spring 62 is slightly greater than the standard pressure. In this way, when the medium pressure exceeds the standard pressure but is less than the preload force, the pressure of the medium will push the movable block 81 to move upward a short distance, and the movable spring 82 is compressed, so that the annular flow channel 811 is connected to the pressure relief channel 32, and the excess pressure is discharged through the pressure relief channel 32. At this time, it is in a small flow pressure relief, and there is no need to open the valve disc 3; when the medium pressure exceeds the preload force, the pressure of the medium will push the movable block 81 to move upward a long distance, so that the annular flow channel 811 is connected to the guide flow channel 33, so that the medium flows out from the outlet of the guide flow channel 33, forming a recoil force on the valve disc 3, thereby increasing the opening speed of the valve disc 3. At this time, the pressure is discharged from the gap between the valve disc 3 and the valve seat 2, which is in a large flow pressure relief; that is, through the staggered arrangement of the pressure relief channel 32 and the guide flow channel 33, the combination of small flow pressure relief and large flow pressure relief is achieved, thereby improving the efficiency during pressure relief and increasing the service life of the valve.

[0045] The valve seat 2 and the valve flap 3 are made of stainless steel.

[0046] The valve seat 2 and valve disc 3 made of stainless steel have excellent corrosion resistance and are stable in high temperature environments and are not prone to deformation or failure. In addition, stainless steel has high mechanical strength and can withstand greater pressure and load.

[0047] The working principle of the present invention is as follows: when the pressure in the system is within the normal range, the valve disc 3 of the safety valve is pressed against the valve seat 2 by the elastic component 6. At this time, the valve is sealed to prevent the medium from flowing out; when the elastic force of the support spring 62 decays after long-term use, the pressure of the upper seat 61 on the elastic ring 74 will decrease, the deformation of the elastic ring 74 will decrease, the content of the hydraulic oil pressed into the detection chamber 713 will decrease, the piston 75 will move down a certain distance, thereby driving the magnetic rod 76 to move down a certain distance, so that the magnetic rod 76 and the coil 77 produce relative movement, cutting the magnetic flux lines, thereby forming an induced current. By detecting the size of the induced current generated on the power detection coil 77, the size of the attenuated elastic force of the support spring 62 can be judged, and then the movable sleeve 71 is driven by the driving motor 72 to move down a corresponding distance, that is, The attenuated elastic force of the support spring 62 can be automatically compensated; the preload force set by the support spring 62 is slightly larger than the standard pressure, so that when the medium pressure exceeds the standard pressure but is less than the preload force, the pressure of the medium will push the movable block 81 to move upward a shorter distance, and the movable spring 82 is compressed, so that the annular flow channel 811 is connected with the pressure relief channel 32, and the excess pressure is discharged through the pressure relief channel 32, and at this time it is in a small flow pressure relief; when the medium pressure exceeds the preload force, the pressure of the medium will push the movable block 81 to move upward a longer distance, so that the annular flow channel 811 is connected with the guide flow channel 33, so that the medium flows out from the outlet of the guide flow channel 33, forming a recoil force on the valve disc 3, thereby increasing the opening speed of the valve disc 3, and at this time the pressure is discharged from the gap between the valve disc 3 and the valve seat 2, and it is in a large flow pressure relief.

[0048] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A hard-sealed marine full-opening and closing safety valve, characterized in that: The safety valve comprises a valve body (1), a valve seat (2), a valve flap (3), a guide seat (4), a valve stem (5), an elastic component (6) and an adjusting component (7); the valve seat (2) is tightly connected to the valve body (1); the valve flap (3) abuts against the valve seat (2); the guide seat (4) is tightly connected to the valve body (1); the valve stem (5) is tightly connected to the valve flap (3); the valve stem (5) is slidably connected to the guide seat (4); the elastic component (6) is sleeved on the valve stem (5); the elastic component (6) is used to provide pressure for the valve flap (3); the adjusting component (7) is tightly connected to the valve body (1); and the adjusting component (7) is used to compensate for the elastic force of the elastic component (6).

2. A hard-sealed marine full-open and closed safety valve according to claim 1, characterized in that: The valve body (1) is provided with a connection port (11), a pressure relief port (12) and a protective cover (13), and the regulating component (7) is located inside the protective cover (13).

3. A hard-sealed marine full-open and closed safety valve according to claim 2, characterized in that: The elastic component (6) comprises an upper seat (61), a support spring (62) and a lower seat (63); the upper seat (61) is slidably connected to the valve stem (5); the upper seat (61) abuts against the adjustment component (7); the lower seat (63) is tightly connected to the valve stem (5); one end of the support spring (62) abuts against the upper seat (61); and the other end of the support spring (62) abuts against the lower seat (63).

4. A hard-sealed marine full-open and closed safety valve according to claim 3, characterized in that: The regulating assembly (7) comprises a movable sleeve (71), a driving motor (72) and a transmission gear (73); the movable sleeve (71) is slidably connected to the valve stem (5); the bottom end of the movable sleeve (71) abuts against the upper seat (61); the driving motor (72) is firmly connected to the inner wall of the shield (13); the output end of the driving motor (72) is transmission-connected to the transmission gear (73); and the transmission gear (73) is transmission-connected to the movable sleeve (71).

5. A hard-sealed marine full-open and closed safety valve according to claim 4, characterized in that: The movable sleeve (71) is provided with a tooth surface (711) and an external thread (712); a through hole at one end of the valve body (1) close to the movable sleeve (71) is provided with an internal thread (14); the external thread (712) meshes with the internal thread (14); and the tooth surface (711) meshes with the transmission gear (73).

6. A hard-sealed marine full-open and closed safety valve according to claim 5, characterized in that: The movable sleeve (71) is provided with a detection chamber (713), and an elastic ring (74) is provided at one end of the movable sleeve (71) close to the upper seat (61). The inner chamber of the elastic ring (74) is filled with hydraulic oil, and the elastic ring (74) is connected to the detection chamber (713). The adjustment component (7) also includes a piston (75), a magnetic rod (76) and a coil (77). The piston (75) is slidably connected to the detection chamber (713), the magnetic rod (76) is tightly connected to the piston (75), and the coil (77) is wound around the periphery of the detection chamber (713), and the coil (77) is externally connected to a detection power supply. During detection, the magnetic bar (76) and the coil (77) generate relative motion.

7. A hard-sealed marine full-open and closed safety valve according to claim 1, characterized in that: The valve disc (3) is provided with an active cavity (31), a pressure relief channel (32) and a guide channel (33); a pressure relief component (8) is provided in the active cavity (31); the pressure relief component (8) is used to guide pressure to the pressure relief channel (32) and the guide channel (33); the pressure relief channel (32) and the guide channel (33) are arranged alternately; the outlet of the pressure relief channel (32) is connected to the pressure relief port (12); and the outlet of the guide channel (33) faces the valve seat (2).

8. A hard-sealed marine full-open and closed safety valve according to claim 7, characterized in that: The pressure relief assembly (8) comprises a movable block (81) and a movable spring (82); the movable block (81) is slidably connected to the movable chamber (31); one end of the movable spring (82) is firmly connected to the movable block (81); the other end of the movable spring (82) is firmly connected to the inner wall of the movable chamber (31); an annular flow channel (811) is provided on the movable block (81); and the annular flow channel (811) is in communication with the connection port (11); When the overpressure is low: the annular flow channel (811) is connected to the pressure relief flow channel (32); When the overpressure is high: the annular flow channel (811) is connected to the guide flow channel (33).

9. A hard-sealed marine full-open and closed safety valve according to claim 1, characterized in that: The valve seat (2) and the valve flap (3) are made of stainless steel.

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