CN205937059U - Diaphragm both sides pressure differential monitoring protection device - Google Patents

Diaphragm both sides pressure differential monitoring protection device Download PDF

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Publication number
CN205937059U
CN205937059U CN201620831064.0U CN201620831064U CN205937059U CN 205937059 U CN205937059 U CN 205937059U CN 201620831064 U CN201620831064 U CN 201620831064U CN 205937059 U CN205937059 U CN 205937059U
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China
Prior art keywords
interface
protecting
monitoring
differential pressure
pressure
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Active
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CN201620831064.0U
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Chinese (zh)
Inventor
赵益群
姜新喜
冷岩昊
张燕
韩立国
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Shenyang Double Ring Pump Co Ltd
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Shenyang Double Ring Pump Co Ltd
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Abstract

The utility model discloses a diaphragm both sides pressure differential monitoring protection device, including the external monitoring protection device body that has the hydraulic pressure diaphragm pump, the monitoring protection device body includes casing, regulator and differential valve, the regulator includes lead screw, spring and circular uide bushing, and the differential valve is injectd into the inner chamber of circular uide bushing below the upper plenum and is descended the cavity, seted up the interface on going up cavity side wall, it is continuous with the medium pump chamber of hydraulic pressure diaphragm pump to go up the interface, interface and ordinary pressure interface have been seted up down on cavity side wall and the diapire respectively, the interface passes through the hydraulic pressure chamber intercommunication of pipeline and hydraulic pressure diaphragm pump down, ordinary pressure interface and hydraulic pressure diaphragm pump hydraulic tank intercommunication. The utility model provides a diaphragm both sides pressure differential monitoring protection device, the practicality is strong, and high -efficient intelligence has realized monitoring the pressure differential of unfamiliar both sides and has reported to the police and adjust to reduce pressure differential, thereby the protection diaphragm is not damaged, the protection diaphragm has improved unfamiliar life.

Description

Every both sides differential pressure of membrane monitoring and protecting device
Technical field
The utility model is related to membrane technique field and in particular to one kind is every both sides differential pressure of membrane monitoring and protecting device.
Background technology
Hydraulic diaphragm is widely used in No leakage operating mode, such as:Flammable and combustible liquids conveys, and toxic liquid conveys, corrosion Property liquid conveying etc., the device of use is such as:Single diaphragm metering pump, double diaphragm metering pumps, single barrier film high-pressure pump, double barrier film high pressure The equipment such as pump, septum buffer, are widely used in the fields such as oil, chemical industry, pharmacy.But during using type selecting, must Carry out type selecting by the maximum pressure of operating mode as the rated pressure of pump, the overflow valve setting value of such hydraulic cavities will be according to specified pressure Power is set.And operating pressure during real work is less than rated pressure, when Fill valve abrasion or fault, hydraulic cavities will Repairing always, and in discharging stroke, cannot be flowed back by overflow valve pressure release because not reaching rated pressure, cause barrier film hydraulic pressure Chamber side oil mass gradually increases, and pressure gradually rises, until the rated pressure of pump, so that the pressure reduction of barrier film both sides raises.Work as pressure When difference is more than the carrying of diaphragm, have two kinds of damage operating modes:One:After the component contact of barrier film dielectric cavity corresponding with pump head, barrier film The pressure reduction on both sides can make the corresponding pump head of membrane surface enter the plastic deformation that can produce projection at outage, under repeat function, make every Film is quickly damaged, or even moment is damaged;Two:It is damaged that the corresponding pump head dielectric cavity discharge opeing import and export of barrier film can produce shearing.Barrier film The excessive serviceability having a strong impact on barrier film of both sides pressure reduction and life-span, cause barrier film failure of pump.Medium can be caused after membrane ruptures Pollution, the problems such as leakage, changing barrier film wastes time and energy, and has a strong impact on system operation, causes the loss of cost.
Therefore, how to invent a kind of pressure reduction to barrier film both sides to be monitored, and reduce the difference of pressure, thus protecting barrier film not Impaired every both sides differential pressure of membrane monitoring and protecting device be those skilled in the art's technical problem urgently to be resolved hurrily.
Utility model content
For solving above-mentioned technical problem, inventor carried out substantial amounts of development test, have found a kind of to barrier film both sides Pressure reduction is monitored, and reduces pressure reduction, thus protect that barrier film is not damaged by every both sides differential pressure of membrane monitoring and protecting device.
Concrete technical scheme of the present utility model is as follows:
A kind of every both sides differential pressure of membrane monitoring and protecting device, including the monitoring and protecting device body being circumscribed with hydraulic diaphragm pump, Described monitoring and protecting device body includes housing with round cavity, the regulator being inserted in housing cavity and activity It is arranged on the different valve of regulator lower end, described regulator includes screw mandrel, the spring being fixed on screw mandrel bottom and set It is contained in the circular fairlead on screw mandrel, described screw mandrel is fixed on housing by locking nut, and described spring is connected to different valve Top, and the inner chamber below circular fairlead is defined as upper plenum and lower cavity by different valve, and described upper plenum side wall opens up There is upper interface, and be connected with the medium pump lumen road of hydraulic diaphragm pump by upper interface, described lower cavity sidewalls and diapire divide Do not offer lower interface and atmospheric pressure interface, described lower interface passes through the hydraulic chamber into communication of pipeline and hydraulic diaphragm pump, described normal pressure Interface is connected with hydraulic diaphragm pump hydraulic oil container, and described different valve can be turned on and off atmospheric pressure interface.
As further improvement of the utility model, the external diameter of described circle fairlead and different valve is interior with described inner chamber Footpath is identical.
As further improvement of the utility model, described circle fairlead is provided with differential pressure signal device, described difference Pressure recoil simulator is used for monitoring whether different valve produces displacement, and feedback alarm signal is to warning device or Control Room.
As further improvement of the utility model, described differential pressure signal device is displacement transducer.
As further improvement of the utility model, the cross section of described different valve is T-shaped, in described atmospheric pressure interface It is embedded with valve seat, described valve seat can seal cooperation with different valve bottom.
As further improvement of the utility model, equal on described screw mandrel, the perisporium of circular fairlead, different valve and valve seat It is embedded with sealing ring.
As further improvement of the utility model, described upper interface is located at the same side of described different valve with lower interface.
The utility model beneficial effect:The utility model provide every both sides differential pressure of membrane monitoring and protecting device, structure is simple, Practical, high efficiency smart is it is achieved that being monitored reporting to the police and adjusted to the pressure reduction of barrier film both sides, and reduces pressure reduction, from And protect barrier film to be not damaged by, protect barrier film, improve the service life of barrier film.
Brief description
Fig. 1 is the connection diagram every both sides differential pressure of membrane monitoring and protecting device and hydraulic diaphragm pump for the utility model;
Fig. 2 is the structural representation every both sides differential pressure of membrane monitoring and protecting device for the utility model;
Fig. 3 is the K of Fig. 2 to schematic diagram.
Specific embodiment
In view of the problems of the prior art, the utility model provides one kind every both sides differential pressure of membrane monitoring and protecting device, As shown in Figure 1 to Figure 2, including the monitoring and protecting device body being circumscribed with hydraulic diaphragm pump, described monitoring and protecting device body bag Include the housing 1 with round cavity, the regulator 2 being inserted in housing 1 inner chamber and be movably arranged on regulator 2 lower end Different valve 3, described regulator 2 includes screw mandrel 21, the spring 22 being fixed on screw mandrel 21 bottom and is sleeved on screw mandrel 21 On circular fairlead 23, described screw mandrel 21 is fixed on housing 1 by locking nut 24, and described spring 22 is connected to different valve 3 tops, and the inner chamber of circular fairlead 23 lower section is defined as upper plenum and lower cavity by different valve 3;
Wherein, described circle fairlead 23 is identical with the internal diameter of described inner chamber with the external diameter of different valve 3.Need explanation It is that different valve 3 is guided position by the valve of itself and sealed with described housing 1, by upper interface 11 and lower interface 12 (i.e. P1 and P2) Keep apart;
Interface 11, and the medium pump chamber 4 by upper interface 11 and hydraulic diaphragm pump are offered on the wall of described upper plenum side Pipeline is connected, and described lower cavity sidewalls and diapire offer lower interface 12 and atmospheric pressure interface 13 respectively, and described lower interface 12 leads to Cross pipeline to connect with the hydraulic cavities 5 of hydraulic diaphragm pump, described atmospheric pressure interface 13 is connected with hydraulic diaphragm pump hydraulic oil container 6, hydraulic pressure Membrane pump hydraulic oil container 6 is communicated with air, and the cross section of described different valve 3 is T-shaped, and described atmospheric pressure interface 13 is embedded with Valve seat 8, described valve seat 8 can seal cooperation with different valve 3 bottom.
Operation principle of the present utility model is, the medium pump chamber 4 of hydraulic diaphragm pump, and pressure is P1, the liquid of hydraulic diaphragm pump Pressure chamber 5, pressure is P2;Atmospheric pressure interface 13 is connected with hydraulic diaphragm pump hydraulic oil container 6, hydraulic diaphragm pump hydraulic oil container 6 and air Communicate;
Regulator 2, for setting the switch valve value Δ P0 of different valve 3;
Described different valve 3 is used to be compared size to P1, P2, when its result Δ P (=P2-P1) is more than Δ P0, Described different valve 3 is opened, and described different valve 3 produces displacement (opening atmospheric pressure interface 13), described different valve 3 and described valve seat upwards 8 separate, and hydraulic oil flows back to hydraulic diaphragm pump hydraulic oil container 6 through described valve seat 8 and described atmospheric pressure interface 13, when barrier film two side pressure During dynamic balance, different valve can be closed immediately due to the effect of spring force;Otherwise, described different valve 3 is to close.
It should be noted that above-mentioned Δ P0 is the hydraulic cavities 5 of the medium pump chamber 4 according to hydraulic diaphragm pump and hydraulic diaphragm pump The intensity allowable of barrier film depending on, establishing method is:When setting this value, described upper interface 11 is communicated with air, to described Lower interface 12 applies Δ P0, gradually adjusts described screw mandrel 21, makes described atmospheric pressure interface 13 just have liquid to flow out, marks described silk Bar 21 position 1;Then slightly rotate described screw mandrel 21 round about, when described atmospheric pressure interface 13 does not have liquid to flow out, mark Remember described screw mandrel 21 position 2, afterwards, described screw mandrel 21 is rotated in place the centre position of 1 and position 2, uses described locking screw Female 24 described screw mandrels 21 of locking.
In addition, it is necessary to explanation, the pressure release that described different valve 3 action is formed is not to carry out pressure release to membrane pump, but In order to protect barrier film, the pressure reduction of balancing diaphragm both sides, pressure release is carried out to the partial pressure of hydraulic cavities superpressure.
Pressure release main method is:1. the pressure P2 working as the hydraulic cavities 5 of hydraulic diaphragm pump is more than the medium pump of hydraulic diaphragm pump The P1 in chamber 4 to a certain extent (to the switch valve value Δ P0 of different valve), that is,:During Δ P=P2-P1 > Δ P0, described different valve 3 dozens Open, just part pressure release is carried out to the hydraulic cavities 5 of hydraulic diaphragm pump, and the part pressure that Δ P exceeds Δ P0 is simply laid down in now pressure release Power, after barrier film pressure at both sides difference Δ P is less than Δ P0, described different valve 3 is closed, and just stops pressure release;2. work as Δ P=P2-P1≤ During Δ P0, this operating mode will not produce to barrier film to be destroyed it is not necessary to protection, so now described different valve 3 is closed always, motionless Make.
Other, described circle fairlead 23 is provided with differential pressure signal device 7, described differential pressure signal device is used for monitoring Whether different valve produces displacement, and feedback alarm signal is to warning device or Control Room.
Other, described differential pressure signal device 7 is displacement transducer.Wherein, differential pressure signal device is not limited to displacement sensing Device, such as proximity switch can also be used as differential pressure signal device.Wherein, described differential pressure signal device 7 passes through to monitor described different valve 3 The displacement producing when opening the pressure reduction of barrier film both sides is monitored, if different valve 3 does not produce displacement, barrier film both sides Pressure reduction in safe range, otherwise, then the pressure reduction of explanation barrier film both sides has exceeded the switch valve value Δ P0 of different valve 3, now, Differential pressure signal device 7 will detect the generation displacement of different valve 3, and feedback alarm signal is to warning device or Control Room simultaneously.
Other, described screw mandrel 21, the perisporium of circular fairlead 23, different valve 3 and valve seat 8 are all embedded with sealing ring 9.
Other, as shown in figure 3, described upper interface 11 is located at the same side of described different valve 3 with lower interface 12.Wherein, Upper interface 11 and lower interface 12 are located at the same side of described different valve 3, and the certain angle that staggers, and so purpose of design, is to carry High surrounding space, is conducive to arrangement to install and safeguards.Further, the size of each interface is the size choosing according to hydraulic diaphragm Select different specifications, mate with barrier film size.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for this For the technical staff in field, the utility model can have various modifications and variations.All of the present utility model spirit and principle Within, any modification, equivalent substitution and improvement made etc., should be included within protection domain of the present utility model.

Claims (7)

1. one kind is every both sides differential pressure of membrane monitoring and protecting device, including the monitoring and protecting device body being circumscribed with hydraulic diaphragm pump, its It is characterised by, described monitoring and protecting device body includes housing (1) with round cavity, is inserted in housing (1) inner chamber Regulator (2) and the different valve (3) being movably arranged on regulator (2) lower end, described regulator (2) includes screw mandrel (21), it is fixed on the spring (22) of screw mandrel (21) bottom and be sleeved on circular fairlead (23) on screw mandrel (21), described Screw mandrel (21) is fixed on housing (1) by locking nut (24), and described spring (22) is connected to different valve (3) top, and poor Inner chamber below circular fairlead (23) is defined as upper plenum and lower cavity by dynamic valve (3), and described upper plenum side wall offers Upper interface (11), and being connected with medium pump chamber (4) pipeline of hydraulic diaphragm pump by upper interface (11), described lower cavity sidewalls with Lower interface (12) and atmospheric pressure interface (13) are offered on diapire, described lower interface (12) passes through pipeline and hydraulic diaphragm pump respectively Hydraulic cavities (5) connect, and described atmospheric pressure interface (13) is connected with hydraulic diaphragm pump hydraulic oil container (6), and described different valve (3) can be opened Or close atmospheric pressure interface (13).
2. according to claim 1 every both sides differential pressure of membrane monitoring and protecting device it is characterised in that described circle fairlead (23) identical with the internal diameter of described inner chamber with the external diameter of different valve (3).
3. according to claim 2 every both sides differential pressure of membrane monitoring and protecting device it is characterised in that described circle fairlead (23) it is provided with differential pressure signal device (7) on, described differential pressure signal device is used for monitoring whether different valve produces displacement, and feeds back Alarm signal is to warning device or Control Room.
4. according to claim 3 every both sides differential pressure of membrane monitoring and protecting device it is characterised in that described differential pressure signal device (7) it is displacement transducer.
5. according to claim 2 every both sides differential pressure of membrane monitoring and protecting device it is characterised in that described different valve (3) Cross section is T-shaped, and described atmospheric pressure interface (13) is embedded with valve seat (8), and described valve seat (8) can be with different valve (3) lower end Portion's sealing cooperation.
6. according to claim 1 to 5 any one every both sides differential pressure of membrane monitoring and protecting device it is characterised in that described All it is embedded with sealing ring (9) on screw mandrel (21), the perisporium of circular fairlead (23), different valve (3) and valve seat (8).
7. according to claim 1 every both sides differential pressure of membrane monitoring and protecting device, described upper interface (11) and lower interface (12) The same side positioned at described different valve (3).
CN201620831064.0U 2016-08-03 2016-08-03 Diaphragm both sides pressure differential monitoring protection device Active CN205937059U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620831064.0U CN205937059U (en) 2016-08-03 2016-08-03 Diaphragm both sides pressure differential monitoring protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620831064.0U CN205937059U (en) 2016-08-03 2016-08-03 Diaphragm both sides pressure differential monitoring protection device

Publications (1)

Publication Number Publication Date
CN205937059U true CN205937059U (en) 2017-02-08

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109281776A (en) * 2018-11-29 2019-01-29 潍柴动力股份有限公司 A kind of exhaust gas recirculation fault monitoring method and device
CN110296266A (en) * 2018-03-23 2019-10-01 浙江三花智能控制股份有限公司 Electric expansion valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110296266A (en) * 2018-03-23 2019-10-01 浙江三花智能控制股份有限公司 Electric expansion valve
CN109281776A (en) * 2018-11-29 2019-01-29 潍柴动力股份有限公司 A kind of exhaust gas recirculation fault monitoring method and device

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