CN214789233U

CN214789233U - Pressure reducing valve with stable pressure regulation

Info

Publication number: CN214789233U
Application number: CN202120814555.5U
Authority: CN
Inventors: 朱俊杰
Original assignee: Wenzhou Meric Hydraulic Co ltd
Current assignee: Wenzhou Meric Hydraulic Co ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-11-19
Anticipated expiration: 2031-04-20

Abstract

The utility model relates to a stable relief pressure valve of pressure regulating, which comprises a valve body, a valve core, throttling element, be provided with the runner in the valve body, the runner is including the inflow section that communicates in proper order, the section of sliding and the section of effluenting, the case slides and sets up in the section of sliding, and the glide direction of case is the same with the transmission direction of the section of sliding, the transmission direction of the section of inflowing and the glide direction mutually perpendicular of case, the case is provided with the intercommunicating pore, the section of effluenting is located one side of the transmission direction of the section of sliding, and the transmission direction of the section of effluenting is the same with the transmission direction of the section of sliding, throttling element is located the case and deviates from the section of effluenting side. Adopt above-mentioned scheme, provide one kind and set the transmission direction of the section of intaking into the slip direction of perpendicular case and will flow out the section and set to the transmission direction along the section of sliding and the at utmost eliminates the hydraulic pressure in the section of intaking and to the interference of sliding of case and make the more smooth outflow of the fluid in the section of flowing out reduce the flow resistance and realize the stable relief pressure valve of pressure regulating more that steps down.

Description

Pressure reducing valve with stable pressure regulation

Technical Field

The utility model relates to a relief valve, concretely relates to stable relief pressure valve of pressure regulating.

Background

The pressure reducing valve is a valve which reduces the inlet pressure to a certain required outlet pressure through regulation and leads the outlet pressure to be automatically kept stable by relying on the energy of the medium. From the viewpoint of hydrodynamics, the pressure reducing valve is a throttling element with variable local resistance, namely, the flow speed and the kinetic energy of fluid are changed by changing the throttling area to cause different pressure losses, thereby achieving the purpose of pressure reduction. Then, the fluctuation of the pressure behind the valve is balanced with the spring force by means of the regulation of the control and regulation system, so that the pressure behind the valve is kept constant within a certain error range.

The pressure reducing valve generally comprises a valve body, a valve core and a throttling element, wherein a flow channel is arranged in the valve body, the valve core is arranged in the flow channel in a sliding manner, and the flow channel is provided with a flow inlet side and a flow outlet side which are positioned at two sides of the valve core, so that the common acting force of the fluid pressure in the flow channel and the throttling element is balanced to drive the valve core to slide, and the increase and decrease of the communication area of the flow inlet side and the flow outlet side are controlled, thereby regulating and controlling the pressure.

The existing pressure reducing valve has the following problems: in the conventional pressure reducing valve, normally, both the inflow side and the outflow side generate component force acting on the valve core along the sliding direction, so that the fluid pressure generating the sliding action on the valve core is too much, and the pressure regulating is unstable due to too many pressure regulating influence factors.

Disclosure of Invention

The pressure reducing valve comprises a pressure regulating valve body, a pressure regulating valve core, a pressure regulating valve body and a pressure regulating valve body, wherein the pressure regulating valve body is provided with a pressure regulating valve core, the pressure regulating valve core is provided with a pressure regulating valve core, and the pressure regulating valve core is provided with a pressure regulating valve core.

In order to achieve the above purpose, the utility model provides a following technical scheme: including valve body, case, throttling element, be provided with the runner in the valve body, the runner is including the section of flowing in, the section of sliding and the section of flowing out that communicates in proper order, the case slides and sets up in the section of sliding, and the slip direction of case is the same with the direction of transmission of the section of sliding, the direction of transmission of the section of flowing in and the direction of sliding mutually perpendicular of case, the case is provided with the intercommunicating pore that is used for communicateing the section of flowing in and the section of sliding, and the section of flowing in is located the slip orbit of intercommunicating pore, the section of flowing out is located one side of the direction of transmission of the section of sliding, and the direction of transmission of the section of flowing out is the same with the direction of transmission of the section of sliding, throttling element is located the case and deviates from the section of flowing out side.

The utility model discloses further set up to: the periphery of the valve core is arranged in a columnar shape, the sliding direction of the valve core is the same as the axial direction of the valve core, the inflow sections are a plurality of sections, the inflow sections are arranged at equal intervals along the circumferential direction of the valve core, and the number and the positions of the communication holes in the valve core are arranged correspondingly to the number and the positions of the inflow sections.

The utility model discloses further set up to: the throttling element comprises a primary spring, a secondary spring, an adjusting rod and a sealing seat, a primary adjusting cavity for mounting the primary spring and a secondary adjusting cavity for mounting the secondary spring are arranged on the valve body on the side of the valve core away from the outflow section, a first liquid outlet hole for communicating the primary adjusting cavity with the sliding section is arranged on the valve core, a second liquid outlet hole for communicating the primary adjusting cavity with the secondary adjusting cavity is arranged between the primary adjusting cavity and the secondary adjusting cavity, a third liquid outlet hole for discharging liquid in the secondary adjusting cavity is arranged on the valve body, the primary spring is compressed and arranged between the valve core and the valve body, the resetting direction of the primary spring is the same as the sliding direction of the communicating hole towards the inflow section, the adjusting rod is arranged in the valve body in a sliding manner along the axial direction, the sealing seat is arranged in the secondary adjusting cavity in a sliding manner, and the secondary spring is compressed and arranged between the sealing seat and the adjusting rod, and the reset direction of the secondary spring is the same as the direction of the sealing seat towards the second liquid outlet hole.

The utility model discloses further set up to: and a ball used for opening and closing the second liquid outlet hole is arranged between the sealing seat and the second liquid outlet hole.

The utility model discloses further set up to: the adjusting rod is in threaded connection with the valve body.

The utility model discloses further set up to: the valve core is positioned at the side of the first liquid outlet hole facing the sliding section and is provided with a filter screen.

The utility model discloses further set up to: the change portion is installed to the screw thread on the case, first play liquid hole and filter screen all set up in the change portion, change the portion and be located the filter screen and deviate from change portion side screw thread and install and be used for the filter screen towards the fixed installation nut of change portion extrusion.

By adopting the technical scheme, 1, the transmission direction of the inflow section is set to be the transmission direction vertical to the sliding section, so that the pressure generated by the hydraulic pressure in the inflow section on the valve core is realized along the sliding direction vertical to the valve core, and the force balance in the sliding direction cannot be influenced by the component force along the sliding direction of the valve core; 2. the section of will effusing sets up in the section of sliding along one side of output direction and realizes that the transmission direction of the section of effusing is the same with the transmission direction of the section of sliding to make fluid medium at the section of sliding and the section of effusing flow resistance in littleer, reduce the step-down interference that the flow resistance produced, in addition, when the section of effusing reverse inflow, the hydraulic pressure that the section of effusing produced still can drive the plug and slide and make the section of effusing cut with the section of sliding, has non-return effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is an enlarged view of A in FIG. 1;

fig. 4 is an enlarged view of B in fig. 2.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-2, the utility model discloses a pressure reducing valve with stable pressure regulation, which comprises a valve body 1, a valve core 2 and a throttling element 3, a flow passage 11 is arranged in the valve body 1, the flow passage 11 comprises a flow inlet section 111, a sliding section 112 and a flow outlet section 113 which are sequentially communicated, the transmission direction of the sliding section 112 is vertically arranged, the flow inlet section 111 is positioned on the side wall of the sliding section 112, the flow outlet section 113 is positioned below the sliding section 112, in addition, the peripheral wall of the sliding section 112 is a cylindrical section which is axially along the vertical direction, the peripheral shape of the valve core 2 is matched with the sliding section 112 and is cylindrical, so that the valve core 2 is vertically arranged in the sliding section 112, the horizontal peripheral wall of the valve core 2 is jointed with the peripheral wall of the sliding section 112 to cut off the conduction between the sliding section 112 and the flow inlet section 111, in addition, the transmission direction of the flow inlet section 111 is horizontally arranged, and the transmission direction of the sliding section 112 is mutually perpendicular, and the peripheral wall of the valve core 2 is provided with a communicating hole 21, and the inflow section 111 is positioned on the sliding track of the communicating hole 21, so that whether the inflow section 111 is communicated with the sliding section 112 or not and the size of the communication area of the inflow section 111 and the sliding section 112 are controlled by the vertical sliding of the communicating hole 21 along with the valve core 2, in addition, the transmission direction of the outflow section 113 and the transmission direction of the sliding section 112 are the same and are transmitted from top to bottom, correspondingly, the throttling element 3 is positioned on the side of the valve core 2 departing from the outflow section 113.

Therefore, the fluid medium is introduced from the inflow section 111, so that the fluid medium enters the slip section 112 from the communication hole 21, and the valve core 2 slides vertically upwards under the action of the hydraulic pressure in the slip section 112 to change the relative position of the communication hole 21 and the inflow section 111 to change the communication area of the inflow section 111 and the slip section 112, thereby reducing the pressure, in addition, the valve core 2 will receive the acting force of the throttling element 3 in the sliding process, when the acting force of the throttling element 3 is balanced with the hydraulic pressure in the slip section 112, the valve core 2 reaches a stable state, the hydraulic pressure in the stable state is continuously output as the outflow hydraulic pressure, in addition, the transmission direction of the inflow section 111 is set to be vertical to the transmission direction of the slip section 112, the pressure generated by the hydraulic pressure in the inflow section 111 on the valve core 2 is along the slip direction of the valve core 2, thereby the force balance along the slip direction cannot be generated by the component force along the slip direction of the valve core 2, and the outflow section 113 is arranged on one side of the slip section 112 along the output direction, and the transmission direction of the outflow section 113 is the same as that of the slip section 112, so that the flow resistance of the fluid medium in the slip section 112 and the outflow section 113 is smaller, the pressure reduction interference generated by the flow resistance is reduced, and when the outflow section 113 reversely flows, the hydraulic pressure generated by the outflow section 113 can drive the valve core 2 to slip to cut off the inflow section 111 and the slip section 112, thereby having a non-return effect.

Preferably, the inflow sections 111 in this embodiment are 2 sections, and the inflow sections 111 are arranged at equal intervals along the circumferential direction of the valve core 2, and correspondingly, the number and positions of the communication holes 21 on the valve core 2 are arranged corresponding to the number and positions of the inflow sections 111, so that the circumferential inflow sections 111 uniformly press the outer periphery of the valve core 2 to perform balance in the horizontal direction, and the inflow sections 111 are placed to press the valve core 2 too much to increase the horizontal thrust of the valve core 2 to the valve body 1 to increase the slip friction force to affect the balance of vertical slip.

Note that the transport direction means a direction in which the fluid medium flows in each part of the flow channel 11, and may also be understood as an extending direction of the flow channel 11.

Referring to fig. 3-4, the throttling element 3 in this embodiment includes a primary spring 31, a secondary spring 32, an adjusting rod 33 and a sealing seat 34, a primary adjusting cavity 12 for mounting the primary spring 31 is disposed on the upper side of the valve body 1 on the valve core 2, and a secondary adjusting cavity 13 for mounting the secondary spring 32 is disposed on the upper side of the primary adjusting cavity 12, wherein a first liquid outlet 22 vertically penetrating is disposed on the valve core 2, so that the primary adjusting cavity 12 and the sliding section 112 are communicated through the first liquid outlet 22, and the aperture of the first liquid outlet 22 is much smaller than the horizontal cross-sectional area of the sliding section 112 (generally, the aperture of the first liquid outlet 22 is 1/10-1/20 of the horizontal cross-sectional area of the sliding section 112), so as to prevent the liquid in the sliding cavity from entering the primary adjusting cavity 12 at high speed and then generating hydraulic pressure to affect the adjustment, and a second adjusting cavity 12 and a second adjusting cavity 13 are disposed between the primary adjusting cavity 12 and the second adjusting cavity 13 Two liquid outlet holes 14, and a third liquid outlet hole 15 for discharging the liquid in the secondary adjusting cavity 13 is arranged on the valve body 1, in addition, the primary spring 31 is compressed and arranged between the valve core 2 and the valve body 1, the reset direction of the primary spring 31 is the same with the downward movement direction of the valve core 2, in addition, the axial direction of the adjusting rod 33 is vertically arranged, the adjusting rod 33 is positioned above the secondary adjusting cavity 13 and is connected with the valve body 1 by adopting a threaded connection mode, and part of the adjusting rod 33 extends into the secondary adjusting cavity 13, so that the adjusting rod 33 can realize vertical sliding through threaded rotation, in addition, the sealing seat 34 is positioned at the bottom end of the secondary adjusting cavity 13, so as to realize the sealing of the second liquid outlet hole 14, and when the sealing seat 34 is hydraulically impacted by the second liquid outlet hole 14, the sealing seat 34 can be pressed to slide upwards to open the second liquid outlet hole 14, wherein, the secondary spring 32 is compressed and arranged between the sealing seat 34 and the adjusting rod 33, and the return direction of the secondary spring 32 is the same as the direction of the sealing seat 34 towards the second outlet hole 14.

Therefore, the throttling element 3 adopts the primary spring 31 and the secondary spring 32 to balance the hydraulic pressure in the sliding section 112 with the elastic force of the valve seat moving downwards, when the hydraulic pressure is larger than the sum of the elastic forces of the primary spring 31 and the secondary spring 32, the sealing seat 34 is opened by the hydraulic pressure in the primary adjusting cavity 12 and synchronously realizes the further compression of the primary spring 31 to increase the elastic force, when the elastic force is balanced with the hydraulic pressure in the sliding section 112 again, the hydraulic pressure in the secondary adjusting cavity 13 can not push the sealing seat 34 and realizes the effective sealing of the sealing seat 34 and the balance of the second liquid outlet 14 under the action of the primary spring 31, the liquid in the primary adjusting cavity 12 and the secondary adjusting cavity 13 is discharged and reflowed through the third liquid outlet 15, in addition, when the hydraulic pressure in the sliding section 112 is reduced, the primary spring 31 is reset, and the liquid in the primary adjusting cavity 12 is supplemented through the first liquid outlet 22, in addition, the pressure of the secondary spring 32 can be adjusted by sliding the adjusting rod 33, so that the pressure reducing device is suitable for reducing the pressure with different intensities.

Preferably, a ball 35 for opening and closing the second liquid outlet hole 14 is arranged between the sealing seat 34 and the second liquid outlet hole 14 in this embodiment, so that the second liquid outlet hole 14 is linearly sealed by the ball 35, and the second liquid outlet hole 14 is opened by the fine motion of the sealing seat 34, so that the adjustment is more sensitive.

In addition, the valve core 2 in this embodiment is provided with the filter screen 4 at the lower side of the first liquid outlet 22, so that the filter screen 4 prevents the particle impurities from entering the first liquid outlet 22 and causing the blockage of the first liquid outlet 22.

In addition, the valve core 2 in this embodiment is provided with the replacing portion 23 through threads, and the spiral rotation of the replacing portion 23 enables the replacing portion 23 to slide along the vertical direction relative to the valve core 2, and in addition, the first liquid outlet hole 22 and the filter screen 4 are both arranged in the replacing portion 23, so that the filter screen 4 can be periodically replaced and the first liquid outlet hole 22 can be blocked and cleaned through the detachment of the replacing portion 23 relative to the valve core 2.

In addition, the replacement part 23 in this embodiment is located the filter screen 4 and is installed with the installation nut 24 that is used for filter screen 4 towards the extrusion of replacement part 23 fixed by the downside screw thread, and the spiral of installation nut 24 rotates and realizes that installation nut 24 can slide along vertical relative replacement part 23, consequently, alright through the installation nut 24 more convenient dismouting of carrying out filter screen 4, but and high strength with filter screen 4 installation in replacement part 23.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a stable relief pressure valve of pressure regulating, includes valve body, case, throttling element, be provided with the runner in the valve body, its characterized in that: the runner is including the section of intaking, the section of sliding and the section of effluenting that communicates in proper order, the case slides and sets up in the section of sliding, and the slip direction of case is the same with the direction of transmission of the section of sliding, the direction of transmission of the section of intaking is mutually perpendicular with the direction of sliding of case, the case is provided with the intercommunicating pore that is used for communicateing the section of intaking and the section of sliding, and the section of intaking is located the slip orbit of intercommunicating pore, the section of effluenting is located one side of the direction of transmission of the section of sliding, and the direction of transmission of the section of effluenting is the same with the direction of transmission of the section of sliding, throttling element is located the case and deviates from the section side of effluenting.

2. The pressure-regulating stabilized pressure reducing valve according to claim 1, characterized in that: the periphery of the valve core is arranged in a columnar shape, the sliding direction of the valve core is the same as the axial direction of the valve core, the inflow sections are a plurality of sections, the inflow sections are arranged at equal intervals along the circumferential direction of the valve core, and the number and the positions of the communication holes in the valve core are arranged correspondingly to the number and the positions of the inflow sections.

3. The pressure-regulating stabilized pressure reducing valve according to claim 1, characterized in that: the throttling element comprises a primary spring, a secondary spring, an adjusting rod and a sealing seat, a primary adjusting cavity for mounting the primary spring and a secondary adjusting cavity for mounting the secondary spring are arranged on the valve body on the side of the valve core away from the outflow section, a first liquid outlet hole for communicating the primary adjusting cavity with the sliding section is arranged on the valve core, a second liquid outlet hole for communicating the primary adjusting cavity with the secondary adjusting cavity is arranged between the primary adjusting cavity and the secondary adjusting cavity, a third liquid outlet hole for discharging liquid in the secondary adjusting cavity is arranged on the valve body, the primary spring is compressed and arranged between the valve core and the valve body, the resetting direction of the primary spring is the same as the sliding direction of the communicating hole towards the inflow section, the adjusting rod is arranged in the valve body in a sliding manner along the axial direction, the sealing seat is arranged in the secondary adjusting cavity in a sliding manner, and the secondary spring is compressed and arranged between the sealing seat and the adjusting rod, and the reset direction of the secondary spring is the same as the direction of the sealing seat towards the second liquid outlet hole.

4. The pressure-regulating stabilized pressure reducing valve according to claim 3, wherein: and a ball used for opening and closing the second liquid outlet hole is arranged between the sealing seat and the second liquid outlet hole.

5. The pressure-regulating stabilized pressure reducing valve according to claim 3, wherein: the adjusting rod is in threaded connection with the valve body.

6. The pressure-regulating stabilized pressure reducing valve according to claim 3, wherein: the valve core is positioned at the side of the first liquid outlet hole facing the sliding section and is provided with a filter screen.

7. The pressure-regulating stabilized pressure reducing valve according to claim 6, wherein: the change portion is installed to the screw thread on the case, first play liquid hole and filter screen all set up in the change portion, change the portion and be located the filter screen and deviate from change portion side screw thread and install and be used for the filter screen towards the fixed installation nut of change portion extrusion.