CN201236987Y

CN201236987Y - Pressure reducing valve

Info

Publication number: CN201236987Y
Application number: CNU2008200639975U
Authority: CN
Inventors: 周伦富
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-27
Filing date: 2008-06-27
Publication date: 2009-05-13
Anticipated expiration: 2018-06-27

Abstract

The utility model relates to a reducing valve, which comprises a valve body (104), wherein, the valve body (104) comprises a water inlet (103), a water outlet (116) and a water entering-passing flow passage (105). The reducing valve is characterized in that a control lever (107) and a pressure sensing membrane (108) for bearing the hydraulic pressure inside the water entering-passing flow passage (105) are also arranged in the valve body (104); the periphery of the pressure sensing membrane (108) is fixed between the valve body (104) and an upper gland bush (109) in a sealing manner; the central part of the pressure sensing membrane (108) is fixed on the control lever (107) in a sealing manner; and a pressure sensing spring (110) is arranged between the control lever (107) and the upper gland bush (109).

Description

Reduction valve

Technical field

The utility model relates to a kind of reduction valve.

Background technique

Along with expanding economy, the trend that water resources situation worsens has appearred in many places, and shortage of water resources and pollution are more and more serious, and city dweller's drinking water safety problem highlights.At the secondary pollution problem of city tap-water and because source water pollutes the harmful matter that renews in tap water, more and more be that the domestic water purifying machine of core filter element enters huge numbers of families with the reverse osmosis membrane.Existing domestic water purifying machine is to be the core filter element with the reverse osmosis membrane, through after the multistage pretreatment and supercharging to tap water, enters reverse osmosis membrane unit again, the pure water that produces can meet the drinking water standard of developed country fully.

But the water outlet hydraulic pressure of the reduction valve that is adopted in existing domestic water purifying machine increases with the increase of source water hydraulic pressure, and security and stability is lower, easily whole pure water machine system is caused damage.

The model utility content

Technical problem to be solved in the utility model provides a kind of pressure limiting effect stability, the reduction valve of output stable water pressure.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: reduction valve, comprise valve body, valve body has water intake, water outlet and water inlet water flowing runner, water intake is connected with water inlet water flowing runner, also have controlling rod in the described valve body and bear the into pressure-sensitive diaphragm of the interior hydraulic pressure of water water flowing runner, the pressure-sensitive diaphragm periphery is sealingly fastened between valve body and the upper press cover, the pressure-sensitive diaphragm central position is sealingly fastened on the controlling rod, be provided with the pressure-sensitive spring between described controlling rod and the upper press cover, the pressure-sensitive both ends of the spring acts on upper press cover inwall and controlling rod upper-end surface respectively; The port that described water outlet extends in the valve body constitutes the water shutoff mouth, be provided with the controlling rod that dams of this water shutoff mouth of sealing in the valve body, fixedly connected with the controlling rod lower end or be structure as a whole in dam controlling rod upper end, the side of the controlling rod that dams sealing water shutoff mouth has the water shutoff diaphragm, and the side of the controlling rod that dams sealing water shutoff mouth, the side of water shutoff diaphragm seal coupling mutually with the end face of water shutoff mouth; The described valve body inherence controlling rod lower end of damming is provided with low high pressure water pressure-sensitive diaphragm, low high pressure water pressure-sensitive diaphragm periphery is sealingly fastened between valve body and the lower cover, low high pressure water pressure-sensitive diaphragm central position is sealingly fastened in the controlling rod underpart of damming by pad and fastening screw nail, cavity between described low high pressure water pressure-sensitive diaphragm and the lower cover constitutes the low pressure water cavity, and the low pressure water cavity is connected by low-pressure water runner and water outlet; Drive the controlling rod to-and-fro motion of damming under the acting in conjunction of the described controlling rod and the controlling rod hydraulic pressure in pressure-sensitive spring and low pressure water cavity that dams and constitute the control unit that current are changed at the switching two states between control water intake, the water outlet.

The described controlling rod that dams is frustum cone structure, and the controlling rod frustum cone structure that dams is outward with seal membrane.The water shutoff mouth area of contour in the horizontal direction that seals coupling mutually with this texture edge is less than the water shutoff open area of horizontal opening under the equal bore, so this controlling rod that dams can reduce the power of bouncing of hydraulic pressure when sealing water shutoff mouth, reduces the vibrations of reduction valve; The side of the structure of this controlling rod that dams has certain inclination, therefore also is convenient to its better sealing water shutoff mouth when the controlling rod that dams moves up and down.

Described upper press cover inwall and pressure-sensitive spring contact position are provided with compression spring, have by the Regulation spring pad above the compression spring to move back and forth the control piece of cutting off the water supply that the sense of control pressing spring is changed between compressive state, nature.

The described control piece of cutting off the water supply is the Joystick that passes the upper press cover upper-end surface, by constituting the control piece of cutting off the water supply that the sense of control pressing spring is changed by Joystick rotation positioning and rotation retractable Joystick between compressive state, nature down.

Be provided with Returnning spring in the described low pressure water cavity, the Returnning spring two ends act on lower cover inwall and gasket surface respectively.

To sum up, the beneficial effects of the utility model are: reduction valve of the present utility model constitutes the control water intake owing to drive the controlling rod to-and-fro motion of damming under the acting in conjunction of controlling rod hydraulic pressure in pressure-sensitive spring and low pressure water cavity, current are logical between the water outlet, the control unit of disconnected two states conversion, therefore when the output hydraulic pressure of water outlet meets or exceeds design load, hydraulic pressure overcomes the pressure-sensitive spring to the active force of low high pressure water pressure-sensitive diaphragm (hydraulic pressure is opposite to the force direction of low high pressure water pressure-sensitive diaphragm and pressure-sensitive diaphragm in the water inlet water flowing runner to the active force of pressure-sensitive diaphragm in the low pressure water cavity, basically cancel each other), push lever also drives the controlling rod that dams and moves up, the water shutoff diaphragm seal water shutoff mouth that the feasible controlling rod that dams has just can be so that output hydraulic pressure descends; When output hydraulic pressure is lower than design load, the pressure-sensitive spring overcomes in the low pressure water cavity hydraulic pressure to the active force of low high pressure water pressure-sensitive diaphragm to the active force of low high pressure water pressure-sensitive diaphragm, push lever also drives the controlling rod that dams and moves down, the water shutoff diaphragm that the feasible controlling rod that dams has keeps the connection in reduction valve water route away from the water shutoff mouth.So move in circles, the output hydraulic pressure of reduction valve just can be subject in the setting value basically.When on the family expenses reverse osmosis equipment, using, can avoid the reverse osmosis water purification plant because the too high product safety fault that causes of hydraulic pressure.

Description of drawings

Fig. 1 is the utility model embodiment 1 a structural representation;

Fig. 2 cuts off the water supply the A-A of button to sectional view among Fig. 1;

Fig. 3 is the utility model embodiment 2 a structural representation.

Mark and corresponding component title among the figure: 101-pad, 102-low high pressure water pressure-sensitive diaphragm, 103-water intake, 104-valve body, 105-water inlet water flowing runner, 106-seal membrane, 107-controlling rod, 108-pressure-sensitive diaphragm, 109-upper press cover, 110-pressure-sensitive spring, 111-compression spring, the 112-adjusting element of cutting off the water supply, 113-the button of cutting off the water supply, the 114-controlling rod that dams, 115-water shutoff mouth, 116-water outlet, 117-low-pressure water runner, 118-lower cover, 119-fastening screw nail, 120-low pressure water cavity, 121-Returnning spring, 201-pad, 202-low high pressure water pressure-sensitive diaphragm, 203-water intake, 204-valve body, 205-water inlet water flowing runner, 206-seal membrane, 207-controlling rod, 208-pressure-sensitive diaphragm, 209-upper press cover, 210-pressure-sensitive spring, 211-compression spring, 212-adjusting element, 214-the controlling rod that dams, 215-water shutoff mouth, 216-water outlet, 217-low-pressure water runner, 218-lower cover, 219-fastening screw nail, 220-low pressure water cavity.

Embodiment

Embodiment 1:

As Fig. 1, shown in Figure 2, reduction valve of the present utility model comprises valve body 104, valve body 104 has water intake 103, water outlet 116 and water inlet water flowing runner 105, water intake 103 is connected with water inlet water flowing runner 105, it is characterized in that, also have controlling rod 107 in the described valve body 104 and bear the into pressure-sensitive diaphragm 108 of water water flowing runner 105 interior hydraulic pressure, pressure-sensitive diaphragm 108 peripheries are sealingly fastened between valve body 104 and the upper press cover 109, pressure-sensitive diaphragm 108 central positions are sealingly fastened on the controlling rod 107, be provided with pressure-sensitive spring 110 between described controlling rod 107 and the upper press cover 109, pressure-sensitive spring 110 two ends act on upper press cover 109 inwalls and controlling rod 107 upper-end surfaces respectively; The port that described water outlet 116 extends in the valve body 104 constitutes water shutoff mouth 115, be provided with the controlling rod 114 that dams of this water shutoff mouth 115 of sealing in the valve body 104, fixedly connected with controlling rod 107 lower ends or be structure as a whole in controlling rod 114 upper ends of damming, the side that the controlling rod 114 that dams seals water shutoff mouths 115 has seal membrane 106, damming, controlling rod 114 seals the side of water shutoff mouths 115, the side of seal membrane 106 seals coupling mutually with the end face of water shutoff mouth 115, the controlling rod that dams of present embodiment is frustum cone structure, and the controlling rod frustum cone structure that dams is outward with seal membrane 106; Described valve body 104 inherences controlling rod 114 lower end of damming are provided with low high pressure water pressure-sensitive diaphragm 102, low high pressure water pressure-sensitive diaphragm 102 peripheries are sealingly fastened between valve body 104 and the lower cover 118, low high pressure water pressure-sensitive diaphragm 102 central positions are fixed in controlling rod 114 underparts of damming by pad 101 and fastening screw nail 119, cavity between described low high pressure water pressure-sensitive diaphragm 102 and the lower cover 118 constitutes low pressure water cavity 120, be provided with Returnning spring 121 in the low pressure water cavity 120, Returnning spring 121 two ends act on lower cover 118 inwalls and pad 101 surfaces respectively, and low pressure water cavity 120 is connected by low-pressure water runner 117 and water outlet 116; Drive controlling rod 114 to-and-fro motion of damming under the acting in conjunction of described controlling rod 114 hydraulic pressure in pressure-sensitive spring 110, low pressure water cavity 120 and constitute the control unit that current are changed at the switching two states between control water intake 103, the water outlet 116; Described upper press cover 109 inwalls and pressure-sensitive spring 110 contact position are provided with compression spring 111, and compression spring 111 tops have by Regulation spring pad 111 move back and forth the control piece of cutting off the water supply that sense of control pressing spring 110 is changed between compressive state, nature; The control piece of cutting off the water supply of present embodiment is the Joystick 113 that passes upper press cover 109 upper-end surfaces, by constituting the control piece of cutting off the water supply that sense of control pressing spring 110 is changed by Joystick 113 rotation positioning and rotation retractable Joystick 113 between compressive state, nature down.The control piece of cutting off the water supply of present embodiment directly passes the port of offering on the upper press cover of friction top, there be not substantive the connection between Joystick 113 and the last friction top, can be directly down by putting in place and Joystick being located by rotation, realization pressure-sensitive spring is finished precompression, and reduction valve is in the relief valve function state of often opening; Otherwise the adjusting Joystick makes the pressure-sensitive spring be returned to unpressed nature, and then this moment, reduction valve was in normally closed stop valve functional status.

Embodiment 2:

As shown in Figure 3, present embodiment and embodiment's 1 difference is that present embodiment does not have the control piece of cutting off the water supply, set up be positioned at compression spring 111 tops and with the adjustable adjusting element that is connected 212 of upper press cover 109 screw threads, and present embodiment is not established Returnning spring; Other each several part structures of present embodiment are identical with embodiment 1.

Claims

1, reduction valve, comprise valve body (104), valve body (104) has water intake (103), water outlet (116) and water inlet water flowing runner (105), water intake (103) is connected with water inlet water flowing runner (105), it is characterized in that, also have controlling rod (107) in the described valve body (104) and bear the into pressure-sensitive diaphragm (108) of the interior hydraulic pressure of water water flowing runner (105), pressure-sensitive diaphragm (108) periphery is sealingly fastened between valve body (104) and the upper press cover (109), pressure-sensitive diaphragm (108) central position is sealingly fastened on the controlling rod (107), be provided with pressure-sensitive spring (110) between described controlling rod (107) and the upper press cover (109), pressure-sensitive spring (110) two ends act on upper press cover (109) inwall and controlling rod (107) upper-end surface respectively; The port that described water outlet (116) extends in the valve body (104) constitutes water shutoff mouth (115), be provided with the controlling rod that dams (114) of this water shutoff mouth (115) of sealing in the valve body (104), fixedly connected with controlling rod (107) lower end or be structure as a whole in dam controlling rod (114) upper end, the side of the controlling rod (114) that dams sealing water shutoff mouth (115) has seal membrane (106), and side, the side of seal membrane (106) and the end-face structure of water shutoff mouth (115) of the controlling rod that dams (114) sealing water shutoff mouth (115) are complementary; Described valve body (104) inherence controlling rod (114) lower end of damming is provided with low high pressure water pressure-sensitive diaphragm (102), low high pressure water pressure-sensitive diaphragm (102) periphery is sealingly fastened between valve body (104) and the lower cover (118), low high pressure water pressure-sensitive diaphragm (102) central position is sealingly fastened in the controlling rod that dams (114) underpart by pad (101) and fastening screw nail (119), cavity between described low high pressure water pressure-sensitive diaphragm (102) and the lower cover (118) constitutes low pressure water cavity (120), and low pressure water cavity (120) is connected by low-pressure water runner (117) and water outlet (116); Drive controlling rod (114) to-and-fro motion of damming under the acting in conjunction of described controlling rod (114) hydraulic pressure in pressure-sensitive spring (110), low pressure water cavity (120) and constitute the control unit that current are changed at the switching two states between control water intake (103), the water outlet (116).

2, reduction valve according to claim 1 is characterized in that, the described controlling rod that dams (114) is frustum cone structure, and the controlling rod that dams (104) frustum cone structure outer surface is with seal membrane (106).

3, reduction valve according to claim 1 and 2, it is characterized in that, described upper press cover (109) inwall and pressure-sensitive spring (110) contact position are provided with compression spring (111), have by Regulation spring pad (111) above the compression spring (111) to move back and forth the control piece of cutting off the water supply that sense of control pressing spring (110) is changed between compressive state, nature.

4, reduction valve according to claim 3, it is characterized in that, the described control piece of cutting off the water supply is for passing the Joystick (113) of upper press cover (109) upper-end surface, by constituting the control piece of cutting off the water supply that sense of control pressing spring (110) is changed by Joystick (113) rotation positioning and rotation retractable Joystick (113) between compressive state, nature down.

5, reduction valve according to claim 1 is characterized in that, is provided with Returnning spring (121) in the described low pressure water cavity (120), and Returnning spring (121) two ends act on lower cover (118) inwall and pad (101) surface respectively.