CN218236324U - Micro differential pressure control solenoid valve - Google Patents

Abstract

The utility model provides a small differential pressure control solenoid valve, include: the valve body, and a housing, the coil pack, the top cap, move the iron core, quiet iron core, the push rod, a valve core, spring and base, wherein the coil pack is installed in the shell, move the iron core and install the installation intracavity that sets up at the coil pack center, the top cap is installed at the shell top, the bottom at the shell is fixed to the valve body, the first half of quiet iron core is installed in the coil pack, the lower half of quiet iron core inserts to the valve body in, the quiet iron core is vertically run through along to the push rod, the case is installed in the case installation cavity of valve body, the bottom and the case top of push rod offset, the pedestal mounting is in the pedestal mounting cavity of valve body, the spring mounting is between case and base. The micro differential pressure control electromagnetic valve adopts the structural design that the push rod and the valve core are mutually separated, so that the valve core can be controlled by the electromagnetic signal to push the valve core to move, or the valve core is pushed to move under the independent action of medium pressure, and the dual control effect of the electromagnetic signal and the medium differential pressure is realized.

Description

Micro differential pressure control solenoid valve

Technical Field

The utility model relates to a solenoid valve technical field, concretely relates to small differential pressure control solenoid valve.

Background

The electric-drive cooling control electromagnetic valve is arranged at a cooling liquid control end in a cooling circulation module of the electric drive system of the new energy automobile and used for adjusting the circulation of cooling liquid so as to control the temperature of the electric power system and guarantee the safety of the electric power system. The traditional coolant control valve only needs to control the opening and closing problem of a coolant passage by considering the on-off mode of a valve, so that the reasonable requirement on the flow can be met. Once the new energy electric vehicle has a power failure, the power signal itself may be blocked, so that the electromagnetic valve is in a temporary power-off state, which may affect the operation of the cooling system. Therefore, in addition to the function of ordinary on-off control of the circulation of the coolant, it is necessary to consider the transition of the valve from the closed state to the full flow state of the coolant with a slight pressure fluctuation (0.01 MPa) of the coolant when the power signal is blocked, i.e., in the power-off state. Because the diameter of the cooling system pipeline is limited, the influence of small pressure change of the cooling liquid on the output force is very little, and how to amplify the change signal of the small flow rate through the design change of a pure mechanical structure becomes a technical difficulty.

In addition, because the traditional electromagnetic valve switch only has a control mode that the electromagnetic signal unilaterally controls the opening and closing of the valve, and does not have the requirement that the valve can be opened (similar to the action of a safety valve) when the required medium pressure reaches a limit value on the basis of considering the safety. Due to the limited diameter of the electromagnetic valve, when the medium pressure of the traditional electromagnetic valve slightly changes, the pressure change of the valve core part is very slight, and if the pressure difference is within the range, the valve is difficult to switch from the closed state to the full-flow state.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a small differential pressure control solenoid valve adopts the structural design that push rod and case break away from each other for the case can receive electromagnetic signal control push rod and promote the case and remove, or receives the medium pressure exclusive action and impel the case to remove, realizes electromagnetic signal and medium differential pressure dual control's effect.

In order to realize the technical scheme, the utility model provides a small differential pressure control solenoid valve, include: the valve body, the shell, the coil pack, the top cap, move the iron core, quiet iron core, the push rod, a valve core, spring and base, wherein coil pack installs in the shell, move the iron core and install the installation intracavity that coil pack center set up, the top cap is installed at the shell top and with the coil pack with move the iron core and seal in the shell, the bottom at the shell is fixed to the valve body, first half installation in the coil pack of quiet iron core, the lower half of quiet iron core inserts to the valve body in, the top that the push rod vertically runs through quiet iron core and push rod along the push rod with move the iron core bottom contact, the case is installed in the valve body, the bottom and the case top of push rod offset, pedestal mounting just is located the below of case in the valve body, the spring mounting is between case in the base, and the top and the case of spring offset, the bottom and the mount pad of spring offset.

Preferably, the valve body comprises a valve body, a static iron core installation cavity is formed in the top of the valve body, a push rod movable cavity is arranged below the static iron core installation cavity, a valve core installation cavity is arranged below the push rod movable cavity, an oil inlet hole communicated with the outside is formed in the inner wall of the middle part of the push rod movable cavity, an oil way groove is formed in the joint of the inner wall of the bottom of the push rod movable cavity and the valve core installation cavity, a base installation cavity is formed in the bottom of the valve core installation cavity, the lower half part of the static iron core is inserted into the static iron core installation cavity of the valve body, the push rod longitudinally penetrates through the static iron core, the top of the push rod is contacted with the bottom of the movable iron core, the valve core is installed in the valve core installation cavity of the valve body, and the bottom of the push rod is abutted against the top of the valve core, the base is installed in the base installation cavity of the valve body, a base oil outlet is formed in the center of the base, the valve core is arranged in a T-shaped structure, the small end of the valve core at the top of the valve core can be inserted into the push rod movable cavity and seals an oil way groove formed in the push rod movable cavity, a plurality of valve core oil passing holes are formed in the side wall of the small end of the valve core, the large end of the valve core at the bottom of the valve core is installed in the valve core installation cavity, the center of the large end of the valve core is provided with a valve core center oil outlet communicated with the valve core oil passing holes formed in the side wall of the small end of the valve core, the spring is installed between the valve core and the base, the top of the spring is abutted against the large end of the valve core, and the bottom of the spring is abutted against the installation seat.

In the above technical scheme, during actual work, the following three situations can occur in the electromagnetic valve: (1) When no electromagnetic signal exists and the pressure of the medium is smaller than a set value (such as smaller than 0.04 MPa), under the action of the elastic force of the spring, the small end head of the valve core seals an oil channel groove arranged on the push rod movable cavity of the valve body, at the moment, the medium cannot pass through the valve core, and the electromagnetic valve is wholly in a closed state. (2) When the medium pressure exceeds a set value (for example, when the medium pressure exceeds 0.045MPa, the small differential pressure changes), the medium enters the push rod movable cavity from the oil inlet hole arranged on the outer wall of the valve body, the small end head of the valve core is slightly pushed away downwards by the medium, an oil way groove is exposed, the medium impacts the large end head of the valve core through the oil way groove at the moment, so that the impact force applied to the valve core is increased, because the stressed area of the valve core is large at the moment, the spring force of a spring below the large end head of the valve core can be effectively overcome, the valve core moves to the maximum opening position, the medium flows in through the valve core oil passing hole arranged on the small end head of the valve core, then the medium flows out through the valve core central oil outlet hole communicated with the valve core oil passing hole arranged on the large end of the valve core, finally the valve body is discharged through the base oil outlet hole arranged on the base, the opening of the electromagnetic valve body is realized, the valve core is arranged into a T-shaped structure with the small upper end and the large end, so that the small end and the small differential pressure changes due to the medium pressure when the medium pressure is applied, the force, the small differential pressure is amplified to the whole valve core, so that the valve core can be completely opened to the maximum opening state, and the small differential pressure control is realized. (3) The solenoid valve receives electromagnetic signal, and coil pack circular telegram for produce the interact between movable iron core and the quiet iron core, and then promote the push rod and move down, through push rod propelling valve core, make the case overcome spring force and move down, no matter whether there is the medium of certain pressure in this state, the case aperture can both reach the open mode, and the circulation of medium also is the maximum condition this moment.

Preferably, it is provided with the filter screen mounting groove to lie in oil inlet department on the valve body outer wall, the inlet port is linked together with the filter screen mounting groove, installs the filter screen in the filter screen mounting groove, can filter the medium through setting up the filter screen, avoids impurity to block up inlet port, oil circuit slot, perhaps the oil outlet.

Preferably, the bottom of the large end head of the valve core is provided with a plurality of valve core oil discharging holes which are distributed in a circumferential array by taking the center oil outlet hole of the valve core as the center of a circle, and each valve core oil discharging hole is communicated with the center oil outlet hole of the valve core, so that the pressure stability of a medium during oil discharging is enhanced, and meanwhile, the sensitivity to the oil pressure change is also improved.

Preferably, the support is installed to shell and valve body butt joint department, makes things convenient for this solenoid valve's integral erection.

Preferably, the inner side surface of the coil assembly is sleeved with a magnetic isolation sleeve, and the tops of the movable iron core and the static iron core are both arranged in the magnetic isolation sleeve so as to enhance the anti-interference performance of the electromagnetic valve.

Preferably, the middle lower part and the middle upper part of the outer wall of the valve body are respectively provided with a first sealing ring mounting groove and a second sealing ring mounting groove, and the first sealing ring and the second sealing ring are respectively and correspondingly mounted in the first sealing ring mounting groove and the second sealing ring mounting groove so as to enhance the overall sealing performance of the electromagnetic valve.

Preferably, the third sealing washer is installed to quiet iron core installation cavity inner wall contact department that sets up on quiet iron core and the valve body to the leakproofness of quiet iron core and quiet iron core installation cavity inner wall contact department of reinforcing.

Preferably, a fourth sealing ring is installed at the contact position of the static iron core and the magnetism isolating sleeve to enhance the sealing performance of the contact position of the static iron core and the magnetism isolating sleeve.

The utility model provides a pair of small differential pressure control solenoid valve's beneficial effect lies in: the micro differential pressure control electromagnetic valve is simple in structure and ingenious in design, and adopts the structural design that the push rod and the valve core are mutually separated, so that the valve core can be controlled by the electromagnetic signal to push the valve core to move, or the valve core is pushed to move under the independent action of medium pressure, and the dual control effect of the electromagnetic signal and the medium differential pressure is realized. And through the structural design of the valve core, when the valve core is under the action of medium pressure, the small differential pressure of the medium pressure is amplified to the stress of the whole valve core due to the change of the area difference, so that the valve core can be completely opened to the maximum opening state, and the control of the small differential pressure is realized.

Drawings

Fig. 1 is an assembly sectional view of the middle valve element when the middle valve element is closed.

Fig. 2 is a rear view of the present invention.

Fig. 3 is a side view of the valve body of the present invention.

Fig. 4 is a side sectional view of the middle valve body of the present invention.

Fig. 5 is a schematic view of a three-dimensional structure of the middle valve element of the present invention.

Fig. 6 is a side view of the valve core of the present invention.

Fig. 7 is a side sectional view of the middle valve element of the present invention.

Fig. 8 is an assembly cross-sectional view of the middle valve element of the present invention when opened by medium pressure.

Fig. 9 is an assembly cross-sectional view of the middle valve element of the present invention when opened by the push rod.

In the figure: 1. a valve body; 101. a valve body; 102. a first seal ring mounting groove; 103. a filter screen mounting groove; 104. an oil inlet hole; 105. a second seal ring mounting groove; 106. a base mounting cavity; 107. a valve core mounting cavity; 108. an oil channel groove; 109. a push rod movable cavity; 110. a static iron core installation cavity; 2. a first seal ring; 3. filtering with a screen; 4. a second seal ring; 5. a third seal ring; 6. a support; 7. a fourth seal ring; 8. a housing; 9. a coil assembly; 10. a top cover; 11. a movable iron core; 12. a stationary core; 13. a magnetic isolation sleeve; 14. a push rod; 15. a valve core; 151. a small end of the valve core; 152. a large end of the valve core; 153. a valve core oil passing hole; 154. an oil outlet hole is formed in the center of the valve core; 155. a valve core oil unloading hole; 16. a spring; 17. a base; 171. the base oil outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art without making any creative effort fall within the protection scope of the present invention.

Example (b): a micro differential pressure control solenoid valve.

Referring to fig. 1 to 9, a minute pressure difference control solenoid valve includes: the electromagnetic valve comprises a valve body 1, a filter screen 3, a support 6, a shell 8, a coil assembly 9, a top cover 10, a movable iron core 11, a static iron core 12, a push rod 14, a valve core 15, a spring 16 and a base 17, wherein the coil assembly 9 is installed in the shell 8, the movable iron core 11 is installed in an installation cavity arranged in the center of the coil assembly 9, the top cover 10 is installed at the top of the shell 8 and seals the coil assembly 9 and the movable iron core 11 in the shell 8, the valve body 1 is fixed at the bottom of the shell 8, the upper half part of the static iron core 12 is installed in the coil assembly 9, the lower half part of the static iron core 13 is inserted into the valve body 1, the support 6 is installed at the joint of the shell 8 and the valve body 1 to facilitate the overall installation of the electromagnetic valve to the outside, a magnetism isolating sleeve 13 is sleeved on the inner side surface of the coil assembly 9, the movable iron core 11 and the top of the static iron core 12 are both installed in the magnetism isolating sleeve 13 to enhance the anti-interference performance of the electromagnetic valve, and a fourth seal ring 7 is installed at the contact position of the static iron core 12 and the magnetism isolating sleeve 13 to enhance the sealing performance of the magnetism isolating sleeve 13;

the valve body 1 comprises a valve body 101, a static iron core installation cavity 110 is formed in the top of the valve body 101, a push rod moving cavity 109 is arranged below the static iron core installation cavity 110, a valve core installation cavity 107 is arranged below the push rod moving cavity 109, an oil inlet 104 communicated with the outside is formed in the inner wall of the middle of the push rod moving cavity 109, an oil channel groove 108 is formed in the joint of the inner wall of the bottom of the push rod moving cavity 109 and the valve core installation cavity 107, a base installation cavity 106 is formed in the bottom of the valve core installation cavity 107, the lower half portion of a static iron core 12 is inserted into the static iron core installation cavity 110 of the valve body 101, a push rod 14 longitudinally penetrates through the static iron core 12, the top of the push rod 14 is contacted with the bottom of a moving iron core 11, the valve core 15 is installed in the valve core installation cavity 107 of the valve body 101, the bottom of the push rod 14 is abutted against the top of the valve core 15, the base 17 is installed in the base installation cavity 106 of the valve body 101, a base oil outlet 171 is formed in the center of the base 17, when an electromagnetic valve works, when an electromagnetic valve receives an electromagnetic signal, the electromagnetic valve, the coil assembly 9 is electrified, so that a mutual acting force is generated between the moving iron core 11 and the iron core 12 and the push rod 14, and the valve core 15 is pushed to open, and the valve core 15, and the spring 15, and the valve core 15 is overcome the elasticity of the spring;

the valve core 15 is arranged into a T-shaped structure with a small upper end and a large lower end, a small valve core end 151 at the top of the valve core 15 can be inserted into the push rod movable cavity 109 and seals an oil channel groove 108 arranged on the push rod movable cavity 109, a plurality of valve core oil passing holes 153 are arranged on the side wall of the small valve core end 151, a large valve core end 152 at the bottom of the valve core 15 is arranged in the valve core mounting cavity 107, a valve core center oil outlet hole 154 communicated with the valve core oil passing holes 153 arranged on the side wall of the small valve core end 151 is arranged at the center of the large valve core end 107, a plurality of valve core oil discharging holes 155 distributed in a circumferential array by taking the valve core center oil outlet hole 154 as the center of a circle are arranged at the bottom of the large valve core end 152, and each valve core oil discharging hole 155 is communicated with the valve core center oil outlet hole 154 so as to enhance the pressure stability of a medium during oil discharging and improve the sensitivity to the oil pressure change; the spring 16 is installed between the valve core 15 and the base 17, the top of the spring 16 abuts against the valve core large end 152 of the valve core 15, and the bottom of the spring 16 abuts against the installation seat 17, during actual operation, when there is no electromagnetic signal and the pressure of the medium is smaller than a set value, under the action of the elastic force of the spring 16, the valve core small end 151 of the valve core 15 seals the oil channel groove 108 formed in the push rod movable cavity 109 of the valve body 101, at this time, the medium cannot pass through the valve core 15, and the electromagnetic valve is entirely in a closed state.

In this embodiment, it is provided with filter screen mounting groove 103 to lie in inlet port 104 department on the outer wall of valve body 101, inlet port 104 is linked together with filter screen mounting groove 103, installs filter screen 3 in filter screen mounting groove 103, can filter the medium through setting up filter screen 3, avoids impurity to block up inlet port, oil circuit slot 108, or the oil outlet. The middle lower part and the middle upper part of the outer wall of the valve body 101 are respectively provided with a first sealing ring mounting groove 102 and a second sealing ring mounting groove 105, and a first sealing ring 2 and a second sealing ring 4 are respectively and correspondingly mounted in the first sealing ring mounting groove 102 and the second sealing ring mounting groove 105 so as to enhance the overall sealing performance of the electromagnetic valve. Third sealing washer 5 is installed to quiet iron core installation cavity 110 inner wall contact department that sets up on quiet iron core 12 and the valve body 101 to the leakproofness of reinforcing quiet iron core 12 and the 110 inner wall contact departments of quiet iron core installation cavity.

In this embodiment, during actual operation, the following three situations can appear in this solenoid valve:

(1) When there is no electromagnetic signal and the pressure of the medium is smaller than a set value (for example, smaller than 0.04 MPa), under the action of the elastic force of the spring 16, the small end 151 of the valve core 15 seals the oil channel groove 108 formed in the rod moving cavity 109 of the valve body 101, at this time, the medium cannot pass through the valve core 15, and the solenoid valve is entirely in a closed state.

(2) When the medium pressure exceeds a set value (for example, when the medium pressure exceeds 0.045MPa, the small differential pressure changes), a medium enters the push rod movable cavity 109 from the oil inlet 104 formed in the outer wall of the valve body 101, the small spool end 151 is pushed slightly downward by the medium to expose the oil channel groove 108, the medium impacts the large spool end 152 through the oil channel groove 108, so that the impact force applied to the spool 15 is increased, because the force-bearing area of the spool 15 is large, the spring force of the spring 16 below the large spool end 152 can be effectively overcome, the spool 15 moves to the maximum opening position, the medium flows in through the spool oil through hole 153 formed in the small spool end 151, then flows out through the spool central oil outlet 154 and the spool oil outlet 155 formed in the large spool end 152 and communicated with the spool oil hole 153, and finally flows out of the valve body 1 through the base oil outlet 171 formed in the base 17, so as to open the electromagnetic valve, the spool 15 is configured as a T-shaped structure in which the small upper end is small and the lower end is large, so that the pressure difference of the spool 15 is amplified due to completely open the pressure difference when the medium pressure is applied, and the medium pressure is completely controlled, so that the spool 15 can be in the minimum opening state.

(3) The electromagnetic valve receives an electromagnetic signal, the coil assembly 9 is electrified, so that an interaction force is generated between the movable iron core 11 and the static iron core 12, the push rod 14 is further pushed to move downwards, the valve core 15 is pushed by the push rod 14, the valve core 15 overcomes the elastic force of the spring 16 to move downwards, no matter whether a medium with certain pressure exists in the state, the opening degree of the valve core 15 can reach an opening state, and the flow rate of the medium is also the maximum state at the moment.

The micro differential pressure control electromagnetic valve is simple in structure and ingenious in design, and adopts the structural design that the push rod 14 and the valve core 15 are separated from each other, so that the valve core 15 can be controlled by the electromagnetic signal to push the valve core 15 to move by the push rod 14, or the valve core 15 can be pushed to move by the independent action of medium pressure, and the dual control effect of the electromagnetic signal and the medium differential pressure is realized. And through the structural design of the valve core 15, when the valve core is under the action of medium pressure, the small differential pressure of the medium pressure is amplified to the stress of the whole valve core 15 due to the change of the area difference, so that the valve core 15 can be completely opened to the maximum opening state, and the control of the small differential pressure is realized.

The above description is only for the preferred embodiment of the present invention, but the present invention should not be limited to the disclosure of the embodiment and the drawings, so that the equivalents and modifications that can be accomplished without departing from the spirit of the present invention are all within the protection scope of the present invention.

Claims (9)

1. A minute pressure difference control solenoid valve characterized by comprising: the valve body, a housing, coil pack, the top cap, move the iron core, quiet iron core, a push rod, a valve core, spring and base, wherein coil pack is in the shell, move the iron core and install the installation intracavity that coil pack center set up, the top cap is installed at the shell top and with coil pack and move the iron core closed shell, the bottom at the shell is fixed to the valve body, the first half of quiet iron core is installed in coil pack, the lower half of quiet iron core inserts to the valve body in, the top that vertically runs through quiet iron core and push rod is followed to the push rod and is moved iron core bottom contact, the case is installed in the valve body, the bottom and the case top of push rod offset, the pedestal mounting just is located the below of case in the valve body, the spring mounting is between case and base, and the top and the case offset of spring, the bottom and the mount pad of spring offset.

2. The micro differential pressure control solenoid valve according to claim 1, wherein: the valve body comprises a valve body, a static iron core installation cavity is formed in the top of the valve body, a push rod movable cavity is arranged below the static iron core installation cavity, a valve core installation cavity is arranged below the push rod movable cavity, an oil inlet hole communicated with the outside is formed in the inner wall of the middle of the push rod movable cavity, an oil way groove is formed in the joint of the inner wall of the bottom of the push rod movable cavity and the valve core installation cavity, a base installation cavity is formed in the bottom of the valve core installation cavity, the lower half portion of a static iron core is inserted into the static iron core installation cavity of the valve body, the push rod longitudinally penetrates through the static iron core and the top of the push rod to be in contact with the bottom of a movable iron core, the valve core is installed in the valve core installation cavity of the valve body, the base is installed in the base installation cavity of the valve body, a base oil outlet hole is formed in the center of the base, the valve core is arranged in a T-shaped structure, a small valve core end head at the top of the valve core can be inserted into the movable cavity of the push rod and seals the oil way groove formed in the movable cavity, a plurality of valve core oil through holes are formed in the side wall of the small end of the valve core, a large end head of the valve core is installed in the valve core installation cavity, and the base of the spring of the valve core, and the spring of the spring.

3. The micro differential pressure control solenoid valve according to claim 2, wherein: a filter screen mounting groove is formed in the position, located at the oil inlet, on the outer wall of the valve body, the oil inlet is communicated with the filter screen mounting groove, and a filter screen is mounted in the filter screen mounting groove.

4. The micro differential pressure control solenoid valve according to claim 2, wherein: the bottom of the large end head of the valve core is provided with a plurality of valve core oil discharging holes which are distributed in a circumferential array by taking the center oil outlet hole of the valve core as the center, and each valve core oil discharging hole is communicated with the center oil outlet hole of the valve core.

5. The minute pressure difference control solenoid valve as claimed in claim 2, wherein: and a support is arranged at the butt joint of the shell and the valve body.

6. The micro differential pressure control solenoid valve according to claim 2, wherein: and the inner side surface of the coil assembly is sleeved with a magnetism-isolating sleeve, and the tops of the movable iron core and the static iron core are both arranged in the magnetism-isolating sleeve.

7. The minute pressure difference control solenoid valve as claimed in claim 2, wherein: and the middle lower part and the middle upper part of the outer wall of the valve body are respectively provided with a first sealing ring mounting groove and a second sealing ring mounting groove, and a first sealing ring and a second sealing ring are respectively and correspondingly mounted in the first sealing ring mounting groove and the second sealing ring mounting groove.

8. The minute pressure difference control solenoid valve as claimed in claim 2, wherein: and a third sealing ring is arranged at the contact position of the static iron core and the inner wall of the static iron core installation cavity arranged on the valve body.

9. The micro differential pressure control solenoid valve according to claim 6, wherein: and a fourth sealing ring is arranged at the contact position of the static iron core and the magnetism isolating sleeve.

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