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CN-121993337-A - Hydraulic switching valve group for energy recovery device and working method

CN121993337ACN 121993337 ACN121993337 ACN 121993337ACN-121993337-A

Abstract

The invention relates to the technical field of sea water desalination equipment, and discloses a hydraulic switching valve group for an energy recovery device and a working method thereof, wherein the hydraulic switching valve group comprises a switching valve group body, and a high-pressure sea water one-way valve and a low-pressure sea water one-way valve are arranged on the outer wall of the switching valve group body; the switching valve group body comprises an outer shell, the inner wall of the outer shell is connected with a pressurizing piston in a sliding mode, a piston cover is arranged on the outer wall of the pressurizing piston, a round rod is arranged on the inner wall of the pressurizing piston, and a reciprocating screw rod is arranged at one end, far away from the pressurizing piston, of the round rod. The high-pressure strong brine drives the impeller to rotate so as to drive the reciprocating screw rod to move with the pressurizing piston, the pressure energy and kinetic energy of the high-pressure strong brine are directly converted into linear reciprocating motion of the pressurizing piston, pressurizing of low-pressure seawater is realized, the energy transmission path is short, the loss is low, the efficiency loss of multiple energy form conversion in the traditional energy recovery device is avoided, the structure is simple, no complex electric control part exists, the equipment manufacturing cost and the maintenance cost are low, and meanwhile, the power requirement of the high-pressure pump is reduced.

Inventors

  • WEI CHAO
  • WANG QINGQING
  • ZHANG MENG
  • GUO TAO
  • MA GE

Assignees

  • 开封高中压阀门有限公司

Dates

Publication Date
20260508
Application Date
20260206

Claims (10)

  1. 1. The hydraulic switching valve group for the energy recovery device comprises a switching valve group body (1) and is characterized in that a high-pressure seawater one-way valve (2) and a low-pressure seawater one-way valve (3) are arranged on the outer wall of the switching valve group body (1); The switching valve bank body (1) comprises an outer shell body (101), a pressurizing piston (102) is slidably connected to the inner wall of the outer shell body (101), a piston cover (103) is arranged on the outer wall of the pressurizing piston (102), a round rod (106) is arranged on the inner wall of the pressurizing piston (102), a reciprocating screw rod (110) is arranged at one end, far away from the pressurizing piston (102), of the round rod (106), a sliding block (119) is connected to the outer edge of the reciprocating screw rod (110) in a threaded manner, an impeller (120) is arranged on the outer wall of the sliding block (119), a power shell body (113) is arranged on the outer wall of the outer shell body (101), a high-pressure strong brine inlet pipe (114) is arranged on the outer wall of the power shell body (113), a protective shell body (115) is arranged at one end, far away from the power shell body (113), of the outer wall of the power shell body (101), a sealing plate (126) is arranged at one end, and a sea water inlet pipe (128) is arranged at the outer wall of the power shell body.
  2. 2. The hydraulic switching valve group for the energy recovery device according to claim 1, wherein a round hole (104) is formed in the inner wall of the pressurizing piston (102), the round rod (106) is located in the round hole (104), a round groove (108) is formed in the outer wall of the round rod (106), and a clamp spring (109) is installed on the inner wall of the round groove (108).
  3. 3. The hydraulic switching valve group for the energy recovery device according to claim 2, wherein the inner wall of the round hole (104) is provided with a limiting groove (105), the outer wall of the round rod (106) is provided with a protruding block (107), the protruding block (107) is positioned in the limiting groove (105), the round groove (108) and the snap spring (109) are provided with two groups, and the two round grooves (108) and the two snap springs (109) are respectively positioned on two sides of the protruding block (107).
  4. 4. The hydraulic switching valve block for an energy recovery device according to claim 1, wherein an end of the impeller (120) remote from the pressurizing piston (102) is provided with a fan wheel (121), and the fan wheel (121) is located in the protective housing (115).
  5. 5. The hydraulic switching valve group for the energy recovery device according to claim 1, wherein a mounting pipe (117) is mounted on the outer wall of the low-pressure strong brine discharge pipe (116), a tail sealing ring (118) is mounted on the inner wall of the mounting pipe (117), a sealing rod (112) is slidably connected to the inner wall of the tail sealing ring (118), a reversing plate (111) is mounted on one end, close to the reciprocating screw (110), of the sealing rod (112), and the reversing plate (111) is mounted on the reciprocating screw (110).
  6. 6. The hydraulic switching valve group for the energy recovery device according to claim 1, wherein a limiting rod (125) is installed on the inner wall of the outer shell (101), a limiting block (124) is connected to the outer edge of the limiting rod (125) in a sliding mode, and the limiting block (124) is installed on the pressurizing piston (102).
  7. 7. The hydraulic switching valve group for an energy recovery device according to claim 5, wherein an extension cylinder (122) is mounted at an end of the power housing (113) away from the protective housing (115), a middle sealing ring (123) is mounted at an end of the extension cylinder (122) away from the power housing (113), and the round rod (106) is slidably connected with the middle sealing ring (123) and the extension cylinder (122).
  8. 8. The hydraulic switching valve group for an energy recovery device according to claim 1, wherein an observation groove (129) is formed in the outer wall of the power housing (113), and sealing glass (130) is mounted on the inner wall of the observation groove (129).
  9. 9. The hydraulic switching valve group for an energy recovery device according to claim 1, wherein the high-pressure seawater discharge pipe (127) is provided with a high-pressure seawater check valve (2) at an end far from the outer casing (101), and the low-pressure seawater check valve (3) is provided at an end far from the outer casing (101) of the low-pressure seawater inlet pipe (128).
  10. 10. The working method of the hydraulic switching valve group for the energy recovery device is characterized by comprising the following steps of: S1, high-pressure strong brine enters a power shell (113) through a high-pressure strong brine inlet pipe (114), and the flow of the high-pressure strong brine drives an impeller (120) and a sliding block (119) in the power shell (113) to rotate; S2, driving a reciprocating screw rod (110), a sealing rod (112), a round rod (106), a pressurizing piston (102) and a piston cover (103) to move towards a sealing plate (126) in an outer shell (101) when an impeller (120) and a sliding block (119) rotate, extruding low-pressure seawater in the outer shell (101) through the pressurizing piston (102) and the piston cover (103), and discharging the low-pressure seawater through a high-pressure seawater discharge pipe (127) and a high-pressure seawater one-way valve (2); S3, continuously inputting high-pressure strong brine to drive the impeller (120) and the sliding block (119) to continuously rotate, and when the pressurizing piston (102) is contacted with the limiting rod (125), the reciprocating screw rod (110), the sealing rod (112), the round rod (106), the pressurizing piston (102) and the piston cover (103) move in the opposite direction of the sealing plate (126) in the outer shell (101); s4, pumping the low-pressure seawater into the outer shell (101) through the pressurizing piston (102) and the piston cover (103), so that the outer shell (101) holds the low-pressure seawater to be pressurized.

Description

Hydraulic switching valve group for energy recovery device and working method Technical Field The invention relates to the technical field of sea water desalination equipment, in particular to a hydraulic switching valve group for an energy recovery device and a working method. Background In the fields of sea water desalination, industrial wastewater treatment and the like, purification and reuse of water resources are often realized through membrane separation technologies such as reverse osmosis and the like. In the running process of the system, a large amount of strong brine with higher pressure is generated after membrane separation, if part of high-pressure strong brine is directly discharged, huge pressure energy waste is caused, and environmental problems such as impact and noise are possibly generated due to direct discharge of high-pressure fluid. The existing switching valve group converts the pressure energy of high-pressure concentrated brine into electric energy through a generator, the motor drives a pressurizing mechanism to pressurize low-pressure water, and multiple energy form conversions lead to serious energy loss, so that the problem of low overall recovery efficiency is caused, and therefore, the development of the hydraulic switching valve group with high energy conversion efficiency has important practical significance. Disclosure of Invention The invention provides a hydraulic switching valve group for an energy recovery device and a working method thereof, which solve the problems proposed by the background technology. The hydraulic switching valve group for the energy recovery device comprises a switching valve group body, wherein a high-pressure seawater one-way valve and a low-pressure seawater one-way valve are arranged on the outer wall of the switching valve group body; the switching valve group body comprises an outer shell, the inner wall sliding connection of outer shell has the pressurization piston, the piston lid is installed to the outer wall of pressurization piston, the round bar is installed to the inner wall of pressurization piston, the round bar is kept away from the one end of pressurization piston and is installed reciprocating screw, the outer edge threaded connection of reciprocating screw has the slider, the impeller is installed to the outer wall of slider, power casing is installed to the outer wall of outer shell, the impeller is located power casing, high-pressure strong brine admission line is installed to power casing's outer wall, the protecting crust is installed to the one end that power casing kept away from outer shell, low-pressure strong brine discharge pipe is installed to the outer wall of protecting crust, the closing plate is installed to the one end that power casing was kept away from to the outer wall of closing plate, high-pressure sea water discharge pipe and low-pressure sea water admission line are installed to the outer wall of closing plate. As a preferable technical scheme of the invention, a round hole is formed in the inner wall of the pressurizing piston, the round rod is positioned in the round hole, a round groove is formed in the outer wall of the round rod, and a clamp spring is arranged on the inner wall of the round groove. As a preferable technical scheme of the invention, the inner wall of the round hole is provided with a limit groove, the outer wall of the round rod is provided with a lug, the lug is positioned in the limit groove, the round groove and the clamp spring are provided with two groups, and the two round grooves and the two clamp springs are respectively positioned at two sides of the lug. As a preferable technical scheme of the invention, one end of the impeller, which is far away from the pressurizing piston, is provided with a fan wheel, and the fan wheel is positioned in the protecting shell. As a preferable technical scheme of the invention, an installation tube is arranged on the outer wall of the low-pressure strong brine discharge tube, a tail sealing ring is arranged on the inner wall of the installation tube, a sealing rod is connected with the inner wall of the tail sealing ring in a sliding manner, a reversing plate is arranged at one end of the sealing rod, which is close to the reciprocating screw rod, and the reversing plate is arranged on the reciprocating screw rod. As a preferable technical scheme of the invention, a limiting rod is arranged on the inner wall of the outer shell, a limiting block is connected with the outer edge of the limiting rod in a sliding manner, and the limiting block is arranged on the pressurizing piston. As a preferable technical scheme of the invention, an extension cylinder is arranged at one end of the power shell far away from the protective shell, a middle sealing ring is arranged at one end of the extension cylinder far away from the power shell, and the round rod is in sliding connection with the middle sealing ring and the extension cylinder. As a prefera