CN209911836U - Pressure control device - Google Patents

Abstract

The embodiment of the application provides a pressure control device, includes: the shell is provided with a central hole in a penetrating way, and the elastic control component is arranged on the shell; the central hole comprises a variable-diameter sealing opening, the variable-diameter sealing opening divides the central hole into a control area and a fluid area, the elastic control assembly is arranged in the control area, and a drainage hole for communicating the central hole with the outside of the shell is formed in the shell corresponding to the control area; the elastic control assembly moves in the central hole under the action of external force to form elastic force and contacts with the reducing sealing port to form linear sealing, and when the elastic control assembly and the reducing sealing port are in a linear sealing state, the drainage hole is communicated with the fluid area; the fluid sealing device can seal and control static pressure and dynamic pressure of fluid quickly, accurately and conveniently.

Description

Pressure control device

Technical Field

The application relates to the field of pressure control equipment, in particular to a pressure control device.

Background

The pressure control device can be used for pressure regulation of neutral or corrosive gas and liquid media, the range of the set value of the pressure control device can be adjusted, and with the development of new technology and new technology, higher requirements are provided for the stability and the accuracy of pressure control, and the traditional pressure control device is difficult to meet the market requirements.

The applicant finds that the existing pressure control devices are unstable in pressure control, inaccurate in opening pressure and closing pressure, difficult in pressure regulation, and difficult to meet the control requirements of zero leakage and zero overflow.

Therefore, the applicant provides a pressure control device by virtue of experience and practice of related industries for many years, so as to overcome the defects of the prior art.

SUMMERY OF THE UTILITY MODEL

To the problem among the prior art, the application provides a pressure control device, can be fast, accurate and convenient static pressure and the dynamic pressure of the fluid seal and control.

In order to solve the technical problem, the application provides the following technical scheme:

the application provides a pressure control device, includes:

the shell is provided with a central hole in a penetrating way, and the elastic control component is arranged on the shell;

the central hole comprises a variable-diameter sealing opening, the variable-diameter sealing opening divides the central hole into a control area and a fluid area, the elastic control assembly is arranged in the control area, and a drainage hole for communicating the central hole with the outside of the shell is formed in the shell corresponding to the control area;

and when the elastic control assembly and the reducing sealing port are released from the linear sealing state, the drainage hole is communicated with the fluid area.

Further, the elasticity control assembly is including inserting in proper order sealed piece, elastic element and the regulation pole in the centre bore, adjust the pole with elastic element's one end is connected, it is in under the exogenic action to adjust the pole do axial motion in the centre bore to elastic element applys thrust, so that elastic element compression produces the resilience force, elastic element's the other end with sealed piece is connected, sealed piece is in under the effect of resilience force with reducing seal port closely laminates and forms line seal.

Further, the device further comprises a locking block for fixing the position of the adjusting rod.

Further, the adjusting rod comprises a first adjusting part inserted into the central hole and a second adjusting part connected with the first adjusting part, and the radius of the bottom surface of the second adjusting part is larger than that of the central hole.

Furthermore, the surface of the first adjusting part is provided with a guide groove, and the locking block can move along the guide groove and is relatively fixed with the guide groove so as to limit the axial movement of the first adjusting part in the central hole.

Further, the guide groove is of a first thread structure, the locking block is sleeved on the first adjusting portion, a locking groove is formed in the inner side of the locking block, and the locking block is matched and locked with the guide groove of the first adjusting portion through the locking groove.

Further, a surface of the housing in the central bore is formed with a second thread formation that cooperates with the first thread formation.

Furthermore, the outer side edge of the locking block is provided with an inward-concave special-shaped structure.

Furthermore, the bottom surface of latch segment is the friction surface, corresponds to the latch segment the top surface of shell is unsmooth latch segment, the bottom surface of latch segment with the top surface laminating of shell is in order to carry out spacingly to the removal of latch segment.

Furthermore, the end face of one end, connected with the reducing sealing port, of the sealing block is an arc face.

Furthermore, the end face of one end, connected with the reducing sealing opening, of the sealing block is a conical surface.

Furthermore, the reducing sealing port is an annular bulge arranged on the inner wall of the central hole, and the annular bulge is matched with one end face of the sealing block to form line sealing.

Further, the housing includes a barrel and a fitting, one end of the fitting being inserted into the barrel, the other end of the fitting being connected to a source of fluid pressure.

Furthermore, a bypass hole is formed in the side wall of the joint in a penetrating mode, an overflowing hole is formed in the wall of the barrel body corresponding to the bypass hole in a penetrating mode, and when one end of the joint is inserted into the barrel body, the bypass hole and the overflowing hole are connected in a penetrating mode to form the drainage hole.

According to the technical scheme, the application provides a pressure control device, through set up the elasticity control assembly in the centre bore, and the elastic force that produces when receiving the exogenic action through elasticity control assembly self forms line seal with the reducing seal mouth in the centre bore, the realization keeps the effect to fluid pressure's preferred, set up drainage hole on the shell simultaneously, when fluid pressure is too big to lead to line seal to relieve, fluid can be followed and discharged in the drainage hole, and then reduce fluidic pressure, carry out accuracy, the stable control to the pressure of fluid.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of the overall construction of a pressure control device according to the present application;

FIG. 2 is a schematic diagram of the pressure control device of the present application;

FIG. 3 is a schematic view of an open state of a pressure control device according to the present application;

FIG. 4 is a schematic view of a sealing condition of the pressure control device of the present application;

FIG. 5 is a schematic view of the pressure control principle of the pressure control device according to the present application;

FIG. 6 is a schematic view of the housing construction described herein;

FIG. 7 is a schematic view of a cartridge configuration described herein;

FIG. 8 is a schematic view of a joint configuration described herein;

FIG. 9 is a schematic view of an adjustment lever configuration according to the present application;

FIG. 10 is a schematic view of the locking block of the present application;

fig. 11 is a schematic view of a seal block according to the present application.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

In consideration of the fact that the existing pressure control device is unstable in pressure control and insensitive in the opening of a sealing surface, the opening pressure and the closing pressure of the sealing surface are inaccurate, pressure regulation is difficult, and the control requirements of zero leakage and zero overflow are difficult to meet, and the control precision and the sensitivity of the traditional pressure control device are not high, therefore, the application provides the pressure control device.

In order to seal and control static pressure and dynamic pressure of fluid quickly, accurately and conveniently, the present application provides an embodiment of a pressure control device, which is shown in fig. 1, 2 and 6, and in the embodiment, the pressure control device specifically comprises: a housing 20 having a central bore 30 formed therethrough and a spring control assembly 10.

Referring to fig. 6 to 8, the housing 20 includes a cylinder 5 and a joint 6, one end of the joint 6 is inserted into the cylinder 5, the other end of the joint 6 is a flow channel inlet 603 and is connected to a fluid pressure source, specifically, the cylinder 5 is provided with a guide channel 501 through, the joint 6 is provided with a medium flow channel 602 through, the guide channel 501 is connected to the medium flow channel 602 to form the central hole 30, a variable diameter seal port 40 is provided in the central hole 30, the variable diameter seal port 40 is provided at a position where the aperture of the central hole 30 changes, the variable diameter seal port 40 divides the central hole 30 into a control region and a fluid region, the elastic control assembly 10 is provided in the control region, a casing of the housing 20 corresponding to the control region is formed with a drainage hole 50 communicating the central hole 30 and the outside of the housing 20, specifically, the cylinder 5 is provided with a flow passing hole 503, the joint 6 is provided with a bypass hole 602, and the flow passing hole 503 and the bypass hole 602 are correspondingly arranged to form the drainage hole 50.

Referring to fig. 9 to 11, the elastic control assembly 10 may be a mandrel inserted into the central hole 30 from top to bottom, the mandrel being capable of moving along an axial direction of the central hole 30, and specifically, the mandrel includes a sealing block 4, an elastic element 3, and an adjusting rod 1 inserted into the central hole 30 in sequence, the adjusting rod 1 is connected to one end of the elastic element 3, the adjusting rod 1 axially moves in the central hole 30 under an external force to apply a thrust force to the elastic element 3, so that the elastic element 3 is compressed to generate a resilient force, the other end of the elastic element 3 is connected to the sealing block 4, and the sealing block 4 is tightly attached to the variable diameter sealing opening 40 under the resilient force to form a line seal 70.

Referring to fig. 10, as a preferred embodiment, in order to achieve the effect of pressure adjustment by using the adjustment lever 1, the length of the adjustment lever 1 inserted into the central hole 30 is specifically limited, the housing 20 further includes a locking block 2 for fixing the position of the adjustment lever 1, a bottom surface of the locking block 2 is a friction surface 203, a top surface of the housing 20 corresponding to the locking block 2 is a concave-convex locking surface 502, the bottom surface of the locking block 2 abuts against the top surface of the housing 20 to limit the movement of the locking block 2, and an outer edge of the locking block 2 is provided with an inwardly concave profiled structure 202. Facilitating the execution of the locking operation.

Referring to fig. 9, as a preferred embodiment, in order to achieve the effect of pressure adjustment by using the adjustment lever 1, the adjustment lever 1 includes a first adjustment portion 102 inserted into the central hole 30 and a second adjustment portion 101 connected to the first adjustment portion 102, a radius of a bottom surface of the second adjustment portion 101 is larger than a radius of the central hole 30, and the second adjustment portion 101 is disposed outside the central hole 30, so as to define an insertion length of the first adjustment portion 102, specifically, the first adjustment portion 102 may be an adjustment stroke with a guide groove 103 disposed on a surface thereof, the locking block 2 may be movable along the guide groove 103 and fixed relative to the guide groove 103 to limit axial movement of the first adjustment portion 102 in the central hole 30, the guide groove 103 may be an external thread structure, and the locking block 2 is sleeved on the first adjustment portion 102, the inboard locking groove 204 that is provided with of latch segment 2, locking groove 204 can be internal thread structure, latch segment 2 passes through locking groove 204 with first regulation portion 102 the guide way 103 cooperation is locked, in order to right adjust pole 1 stretches into length in the centre bore 30 is injectd, in some other embodiments of this application, the surface that shell 20 is located in the centre bore 30 be formed with first thread structure complex second thread structure, second thread structure can be for the internal thread of seting up on the centre bore 30 inner wall, so that adjust pole 1 can be in do axial motion in the centre bore 30, and with this right adjust pole 1 stretches into length in the centre bore 30 is injectd.

Referring to fig. 11, as a preferred embodiment, in order to achieve a better sealing effect, the reducing sealing port 40 is an annular protrusion formed on the inner wall of the central hole 30, the sealing block 4 is an arc surface with an end surface connected to the reducing sealing port 40, in other embodiments of the present application, the sealing block 4 is also an arc surface or other line contact structure capable of tightly fitting the reducing sealing port 40, and the shape of the end surface of the sealing block 4 is not specifically limited, and is capable of tightly fitting the reducing sealing port 40 and achieving a sealing effect.

Referring to fig. 3, when the pressure control device of the present application is in an open state, the mandrel is placed in the central hole 30, the elastic element 3 is in a free state, and the hydraulic medium enters the medium flow channel 602 from the flow channel inlet 603 and flows out through the drain hole until the pressure at the flow channel inlet 603 is approximately equal to the pressure at the outlet of the drain hole, so that the pressure of the hydraulic medium is stably reduced.

Referring to fig. 4, when the pressure control device of the present application is in a sealed state, the adjusting rod 1 axially moves in the central hole 30 and compresses the elastic element 3, so as to push the sealing block 4 to move, when the sealing surface 401 of the sealing block 4 contacts the reducing sealing port 40, a linear seal 70 is formed, a hydraulic medium enters from the flow channel inlet 603, a sealing cavity 604 is formed, the elastic element 3 is pressed by the axial pressure of the adjusting rod 1 to further store elastic energy, the greater the compression amount of the elastic element 3, the greater the stored energy, the higher the upper limit of the pressure capable of bearing the sealing cavity 604 is, after the pressure is adjusted to a set value, the friction surface 203 of the locking block 2 is attached to and locked with the locking surface 502 of the cylinder 5, and meanwhile, the position of the adjusting rod 1 is locked and fixed by the locking block 2, so as to achieve pressure maintaining and sealing.

Referring to fig. 5, when the pressure control device of the present application controls pressure, the adjusting rod 1 is utilized to enable the sealing block 4 and the reducing sealing port 40 to be tightly attached to form a line seal 70, a hydraulic medium enters through the flow channel inlet 603 and flows through the medium flow channel 602, a closed hydraulic pressure is formed in the sealing cavity 604, and when the hydraulic pressure is increased until the hydraulic pressure is greater than a sealing pressure value set by the adjusting rod 1, the hydraulic medium is discharged from the liquid discharge hole and flows back. If high-pressure sealing is needed after pressurization, the adjusting rod 1 can be operated to axially move to compress the elastic element 3, the pressure is gradually adjusted according to the backflow amount until the backflow amount is zero, the pressure in the sealing cavity 604 is ensured to be stable without leakage, and then the adjusting rod 1 is locked by the locking block 2 to realize pressure maintaining after pressurization.

As can be seen from the above description, according to the pressure control device provided in the embodiment of the present application, the elastic control assembly 10 is disposed in the central hole 30, and the line seal 70 is formed between the elastic force generated when the elastic control assembly 10 is subjected to an external force and the variable diameter seal port 40 in the central hole 30, so as to achieve a better effect of maintaining the fluid pressure, and meanwhile, the drainage hole 50 is formed in the housing 20, so that when the line seal 70 is released due to an excessive fluid pressure, the fluid can be discharged from the drainage hole 50, thereby reducing the fluid pressure, and performing precise and stable control on the fluid pressure.

To further explain the present invention, the present application further provides a specific application example of the pressure control device, which specifically includes the following contents:

the variable diameter sealing device comprises a mandrel 10 and a shell 20, wherein the shell 20 comprises a through center hole 30, a variable diameter sealing opening 40 is formed in the shell, and a liquid discharge hole 50 is formed in the side wall of the shell 20.

The mandrel 10 is engaged with the central hole 30 of the housing 20, and the mandrel 10 can move in the axial direction of the central hole 30.

The mandrel 10 comprises an adjusting rod 1, an elastic element 3 and a sealing block 4. The adjusting rod 1 is rod-shaped, one end is an adjusting end 101, the other end is long enough to meet the deformation range of the elastic element 3 in order to adjust the special-shaped structure, and the outer surface of the rod is provided with a guide groove 103 which is matched with the central hole 30 of the shell 20 and is locked and matched with the through hole 201 of the locking block 2.

The elastic element 3, which has a structure with elastic characteristics, is positioned between the adjusting rod 1 and the sealing block 4, and is convenient for energy storage or release, conversion and force transmission.

The sealing block 4 has a cambered or conical sealing surface 401 at one end to form a linear seal 70 with the inner diameter-variable sealing port 40 of the housing 20, and an active surface 402 at the other end to contact the elastic element 3.

The housing 20 includes a locking block 2, a barrel 5, and a joint 6.

The locking block 2 is internally provided with a through hole 201, a locking groove 204 is attached to the through hole 201 and is in locking fit with the adjusting rod 1, the outside of the locking block is a special-shaped structure 202 convenient for locking operation, the bottom end of the locking block 2 is a friction surface 203 and is attached and restrained with the end surface of the barrel 5, the locking block 2 and the barrel 5 are prevented from generating relative movement, and meanwhile the position of the adjusting rod 1 is locked.

The barrel 5 is a cylindrical structure, the guide channel 501 is long enough to meet the requirement of adjusting the stroke of the rod 1, one end of the guide channel is connected with the joint 6, the end face of the other end of the guide channel is of a concave-convex locking structure 502, the locking block 2 is convenient to match, and the inner hole is the special-shaped guide groove 103, so that the rod 1 can move axially.

The reducing channel arranged in the joint 6 is a medium channel 602, one end of the reducing channel is a channel inlet 603 and is connected with a hydraulic source, the other end of the reducing channel is connected with the cylinder 5 and is communicated with the guide channel 501 of the cylinder 5 to form a central hole 30 of the shell 20, and the side wall of the reducing channel is provided with a through hole 601 which is a bypass hole and is communicated with a through hole of the cylinder 5 to form a liquid discharge hole 50.

When the adjusting rod 1 moves downwards along the axial direction of the cylinder 5, the elastic element 3 stores energy and applies pressure to the sealing block 4 at the same time, and the sealing block 4 is in contact fit with the central hole 30 of the joint 6 under the action of the pressure to form a line seal 70.

The energy of the elastic element 3 is released or stored by the ascending or descending of the adjusting rod 1, and the pressure of the sealing block 4 is controlled by the energy change of the elastic element 3, so that the pressure compensation and control in the sealing cavity 604 are realized.

The installation scheme of the specific embodiment is as follows:

the housing 20 is assembled: the cylinder 5 is connected with the joint 6, and the two through holes are connected to form a through center hole 30 to form a sealed flow passage. The locking block 2 and the end face of the cylinder 5 are locked by friction.

The mandrel 10 is assembled: the sealing block 4, the elastic element 3 and the adjusting rod 1 are sequentially arranged in a central hole 30 of the shell 20 from the end of the cylinder 5, the adjusting rod 1 moves downwards in the axial direction to compress the elastic element 3, the elastic element 3 stores energy, pressure is applied to the sealing block 4, the sealing block 4 is in contact fit with the diameter-changing part of the shell 20 under the action of pressure to form a line seal 70, and the locking block 2 is in locking fit with the other end face of the cylinder 5 after the adjusting rod 1 is displaced to a proper position according to the requirement of sealing pressure to lock the position of the adjusting rod 1.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.

Claims (14)

1. A pressure control device, comprising: the shell is provided with a central hole in a penetrating way, and the elastic control component is arranged on the shell;

the central hole comprises a variable-diameter sealing opening, the variable-diameter sealing opening divides the central hole into a control area and a fluid area, the elastic control assembly is arranged in the control area, and a drainage hole for communicating the central hole with the outside of the shell is formed in the shell corresponding to the control area;

and when the elastic control assembly and the reducing sealing port are released from the linear sealing state, the drainage hole is communicated with the fluid area.

2. The pressure control device of claim 1, wherein the elastic control assembly comprises a sealing block, an elastic element and an adjusting rod, the sealing block, the elastic element and the adjusting rod are sequentially inserted into the central hole, the adjusting rod is connected with one end of the elastic element, the adjusting rod moves axially in the central hole under the action of external force to apply thrust to the elastic element so that the elastic element is compressed to generate resilience force, the other end of the elastic element is connected with the sealing block, and the sealing block is tightly attached to the variable-diameter sealing opening under the action of the resilience force to form a linear seal.

3. The pressure control apparatus of claim 2, further comprising a locking block for fixing the position of the adjustment lever.

4. The pressure control apparatus of claim 3, wherein the adjustment lever includes a first adjustment portion inserted into the central hole and a second adjustment portion connected to the first adjustment portion, and a radius of a bottom surface of the second adjustment portion is larger than a radius of the central hole.

5. The pressure control device of claim 4, wherein a surface of the first adjustment portion is provided with a guide groove, and the locking block is movable along the guide groove and fixed relative to the guide groove to limit axial movement of the first adjustment portion in the central bore.

6. The pressure control device of claim 5, wherein the guide groove is a first thread structure, the locking block is sleeved on the first adjusting portion, a locking groove is formed on the inner side of the locking block, and the locking block is locked with the guide groove of the first adjusting portion through the locking groove.

7. A pressure control device as claimed in claim 6 in which the surface of the housing in the central bore is formed with a second screw thread formation which co-operates with the first screw thread formation.

8. The pressure control device of claim 3, wherein the outer edge of the locking block is provided with an inwardly recessed profile.

9. The pressure control device of claim 3, wherein the bottom surface of the locking block is a friction surface, the top surface of the housing corresponding to the locking block is a concave-convex locking surface, and the bottom surface of the locking block is attached to the top surface of the housing to limit the movement of the locking block.

10. The pressure control device as claimed in claim 2, wherein the end face of the sealing block connected with the reducing sealing port is an arc surface.

11. The pressure control device as claimed in claim 2, wherein the end surface of the sealing block connected with the reducing sealing port is a conical surface.

12. The pressure control device as claimed in claim 2, wherein the reducing sealing port is an annular protrusion arranged on the inner wall of the central hole, and the annular protrusion is matched with one end face of the sealing block to form a line seal.

13. The pressure control device of claim 1, wherein the housing comprises a barrel and a fitting, one end of the fitting being inserted into the barrel and the other end of the fitting being connected to a source of fluid pressure.

14. The pressure control device as claimed in claim 13, wherein a bypass hole is formed through a sidewall of the joint, a flow passing hole is formed through a wall of the cylinder corresponding to the bypass hole, and when one end of the joint is inserted into the cylinder, the bypass hole is connected to the flow passing hole to form the drainage hole.

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