High-pressure safety valve
By designing a retaining ring for the upper valve core and a sealing structure for the lower valve core in the high-pressure safety valve, the problem of inaccurate control of the valve core sliding pressure is solved, and more precise gas emission control is achieved.
Patent Information
- Application Number
- CN202520764083.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-04-22
AI Technical Summary
The valve core of existing safety valves requires sufficient pressure to slide, resulting in inaccurate pressure control.
A high-pressure safety valve was designed. By setting a retaining ring at the end of the upper valve core and a sealing element at the end of the lower valve core, when the gas source pressure is too high, the retaining ring is pushed away from the sealing element, and the gas is discharged directly from the exhaust port, reducing the sliding distance of the valve core assembly and improving the sensitivity of pressure control.
It improves the accuracy and sensitivity of pressure control, ensuring accurate discharge of gas source pressure.
Smart Images
Figure CN223881795U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of safety valve, concretely relates to a high pressure safety valve. BACKGROUND
[0002] Safety valve is the closing piece under the action of external force and is in the normally closed state, when the medium pressure in the equipment or pipeline rises more than the specified value, it prevents the medium pressure in the pipeline or equipment from exceeding the specified value by discharging the medium to the system outside; The existing safety valve usually includes a valve seat and a valve core, the valve seat is usually provided with an exhaust port, a gas passage is formed in the valve core, and a through hole is formed on the valve core, when the gas pressure in the gas passage rises, the valve core slides to the through hole and the exhaust port is communicated, and the exhaust is completed, and the valve core resets to close the exhaust port, but a plurality of sealing rings are arranged between the valve core and the valve seat, and the sliding of the valve core requires sufficient pressure, which leads to inaccurate pressure control.
[0003] Therefore, how to avoid the sliding of the valve core requiring sufficient pressure leading to inaccurate pressure control is a technical problem to be solved in the field.
[0004] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background of the present application, and therefore, the above description is not considered as information of the prior art. CONTENT OF THE UTILITY MODEL
[0005] The embodiments of the present disclosure at least provide a high pressure safety valve.
[0006] In a first aspect, the embodiments of the present disclosure provide a high pressure safety valve, comprising: a valve seat, a side wall of which is provided with an exhaust port; a valve core assembly, comprising an upper valve core and a lower valve core, the upper valve core is slidingly arranged in the valve seat, and the upper valve core is always in contact with the lower valve core in a free state; the lower valve core is provided with a first gas passage, the first gas passage is communicated with a gas source, and the first gas passage penetrates the side wall of the lower valve core, and the end of the lower valve core is provided with a sealing element; the upper valve core is provided with a second gas passage, the second gas passage penetrates the side wall of the upper valve core and is communicated with the exhaust port, and the end of the upper valve core is provided with a tapered contact ring, the contact ring is always in contact with the sealing element; wherein, when the gas source pressure is too high, the contact ring is pushed away from the sealing element, and the gas is discharged from the exhaust port through the second gas passage to release pressure; when the gas source completes pressure relief, the contact ring recontacts the sealing element.
[0007] In an optional embodiment, a first ring groove is formed in the valve seat, and the first ring groove is communicated with the penetration of the first gas passage and the contact of the contact ring, respectively.
[0008] In an optional embodiment, an installation ring groove is formed in the end face of the lower valve core, and the sealing element is clamped in the installation ring groove.
[0009] In an alternative embodiment, the mounting ring groove is trapezoidal in cross section, the sealing member is ring-shaped, and the sealing member is fitted to the side wall and bottom wall of the mounting ring groove.
[0010] In an alternative embodiment, the bottom of the valve seat is provided with a lower valve cover, the lower valve cover is provided with an air inlet, the air inlet is provided with a sink to accommodate the first spring, the first air passage is provided with a sink, and the other end of the first spring is accommodated in the sink of the first air passage to always upwardly abut the lower valve core against the upper valve core.
[0011] In an alternative embodiment, the side wall of the lower valve core is provided with a support ring adapted to abut the end of the valve seat to axially limit the lower valve core.
[0012] In an alternative embodiment, the side wall of the upper valve core is provided with a pair of O-rings above and below the exhaust port to seal the gap between the upper valve core and the valve seat.
[0013] In an alternative embodiment, the valve seat is provided with a second ring groove, and the second ring groove is in communication with the through hole of the second air passage and the exhaust port.
[0014] In an alternative embodiment, the top of the valve seat is provided with an upper valve cover, the top of the upper valve cover is threadedly connected with an adjusting block, the upper valve cover is provided with a second spring, the end of the upper valve core is provided with a connecting flange, and the second spring is supported between the adjusting block and the connecting flange.
[0015] In an alternative embodiment, the end face of the adjusting block is provided with a tapered centering hole, the abutting end of the second spring and the connecting flange is sleeved with a centering block, the end of the centering block is provided with a tapered block, and the tapered block is abutted in the centering hole.
[0016] The beneficial effects of the present utility model are that, by arranging the abutting ring on the end of the upper valve core and the sealing member on the end of the lower valve core, when the gas source pressure is too high, the abutting ring is opened and the gas is directly discharged from the exhaust port, the sliding distance of the valve core assembly is reduced, the sensitivity of pressure control is improved, and the accuracy of the gas source pressure is ensured.
[0017] Other features and advantages of the present utility model will be set forth in the subsequent description, and some will become apparent from the description, or will be understood from the practice of the present utility model. The objects and other advantages of the present utility model will be realized and achieved by the structure specifically pointed out in the specification, claims, and drawings.
[0018] In order to make the above object, features and advantages of the present application more obvious, a preferred embodiment is described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to make the above object, features and advantages of the present application more obvious, a preferred embodiment is described in detail below, and the accompanying drawings are described as follows.
[0020] Fig. 1 A sectional view of a high-pressure safety valve provided by the embodiment of the present disclosure;
[0021] Fig. 2 A structural schematic view of a valve seat and a lower valve cover provided by the embodiment of the present disclosure;
[0022] Fig. 3 A structural schematic view of a valve seat and an upper valve cover provided by the embodiment of the present disclosure.
[0023] In the drawings:
[0024] 1, valve seat; 11, exhaust port; 12, first annular groove; 13, second annular groove;
[0025] 2, valve core assembly;
[0026] 21, upper valve core; 21a, second air passage; 21b, abutting ring; 21c, O-ring; 21d, connecting flange;
[0027] 22, lower valve core; 22a, first air passage; 22b, sealing element; 22c, mounting annular groove; 22d, supporting ring;
[0028] 3, lower valve cover; 31, air inlet; 32, first spring;
[0029] 4, upper valve cover; 41, adjusting block; 41a, centering hole; 42, second spring; 43, centering block; 43a, tapered block. DETAILED DESCRIPTION
[0030] In order to make the above object, features and advantages of the present application more obvious, a preferred embodiment is described in detail below, and the accompanying drawings are described as follows.
[0031] In this document, when it is mentioned that a first component is located on a second component, it can mean that the first component can be formed directly on the second component, or a third component can be interposed between the first component and the second component. In addition, in the drawings, in order to effectively describe the technical content, the thickness of the components can be exaggerated or reduced.
[0032] The terminology used herein is for the purpose of describing particular example configurations only and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" can be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are discussed or illustrated, unless specifically identified as an order of performance. Additional or alternative steps can be employed.
[0033] As used herein, the phrases "in an embodiment," "according to an embodiment," "in some embodiments," and the like, generally mean the particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of the present disclosure. Thus, features, structures, or characteristics can be included in more than one embodiment of the present disclosure, and therefore the phrases, "in an embodiment," "according to an embodiment," "in some embodiments," and the like, are not necessarily referring to the same embodiment. As used herein, the terms "example," "exemplary," and the like, mean "serving as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations, aspects, or designs. Rather, the use of the terms "example," "exemplary," and the like, is intended to present concepts in a concrete manner.
[0034] It is found through research that in the prior art, the valve core assembly needs to slide to the through hole to communicate with the exhaust port to exhaust and release pressure, and the sliding distance of the valve core assembly is relatively long, and the pressure control is not accurate, which is a problem and purpose to be solved by the utility model.
[0035] Based on the above research, the utility model embodiment provides a high-pressure safety valve, which directly completes exhaust and pressure release by abutting the upper valve core and the lower valve core when the gas source pressure is too high.
[0036] The defects of the above scheme are the results obtained by the utility model person after practice and careful research, therefore, the discovery process of the above problems and the solutions proposed by the utility model for the above problems in this paper should be the contribution of the utility model person to the utility model in the process of the utility model.
[0037] It should be noted that like reference numerals and letters refer to like items throughout the several views, and once an item is defined in one view, it is not necessarily required to be further defined and explained in the subsequent views.
[0038] Some embodiments of the present application will be described in detail with reference to the drawings. The following embodiments and features of the embodiments described below can be combined with each other in the case of no conflict.
[0039] Referring to Figs. 1 to 3 , a high-pressure safety valve is shown, comprising: a valve seat 1, a side wall of which is provided with an exhaust port 11; a valve core assembly 2, comprising an upper valve core 21 and a lower valve core 22, the upper valve core 21 is slidingly arranged in the valve seat 1, and the upper valve core 21 is always in contact with the lower valve core 22 in a free state; the lower valve core 22 is provided with a first air passage 22a, the first air passage 22a is in communication with the gas source, and the first air passage 22a penetrates the side wall of the lower valve core 22, and the end of the lower valve core 22 is provided with a sealing element 22b; the upper valve core 21 is provided with a second air passage 21a, the second air passage 21a penetrates the side wall of the upper valve core 21 and communicates with the exhaust port 11, and the end of the upper valve core 21 is provided with a tapered abutting ring 21b, which always abuts the sealing element 22b; wherein when the gas source pressure is too high, the abutting ring 21b is pushed away from the sealing element 22b, and the gas is discharged from the exhaust port 11 through the second air passage 21a to relieve pressure; after the gas source completes pressure relief, the abutting ring 21b abuts the sealing element 22b again; in short, by arranging the abutting ring 21b at the end of the upper valve core 21 and the sealing element 22b at the end of the lower valve core 22, when the gas source pressure is too high, the abutting ring 21b is pushed away and the gas is directly discharged from the exhaust port 11, reducing the sliding distance of the valve core assembly 2, improving the sensitivity of pressure control, and ensuring the accuracy of the gas source pressure.
[0040] In some embodiments, a first ring groove 12 is formed in the valve seat 1, and the first ring groove 12 is in communication with the penetration of the first air passage 22a and the abutting position of the abutting ring 21b, respectively; in short, the first air passage 22a is a counterbore, and a plurality of penetration holes are formed in the side wall of the counterbore to communicate the first air passage 22a and the first ring groove 12, so that the first air passage 22a, the first ring groove 12 and the abutting position of the abutting ring 21b are in communication.
[0041] In some embodiments, an installation ring groove 22c is formed in the end face of the lower valve core 22, and the sealing element 22b is clamped in the installation ring groove 22c; in short, in order to avoid the direct abutment of the upper valve core 21 and the end face of the lower valve core 22, which causes wear and leakage of the upper valve core 21 and the lower valve core 22, the installation ring groove 22c is arranged on the end face of the lower valve core 22 to install the sealing element 22b, and the sealing abutment of the upper valve core 21 and the lower valve core 22 is completed.
[0042] In some embodiments, the cross section of the mounting ring groove 22c is trapezoidal, the sealing member 22b is ring-shaped, and the sealing member 22b is attached to the side wall and bottom wall of the mounting ring groove 22c; in short, in order to prevent the sealing member 22b from sliding out, the mounting ring is trapezoidal, so that the mouth of the mounting ring groove 22c is small, thereby preventing the sealing member 22b from sliding out.
[0043] In some embodiments, the bottom of the valve seat 1 is provided with a lower valve cover 3, the lower valve cover 3 is provided with an air inlet 31, the mouth of the air inlet 31 is provided with a sunken platform to place a first spring 32; the mouth of the first air channel 22a is provided with a sunken platform, the other end of the first spring 32 is abutted in the sunken platform of the first air channel 22a, so that the lower valve core 22 always abuts the upper valve core 21; in short, in order to ensure that the upper valve core 21 can always abut the lower valve core 22, the lower valve core 22 is supported by the first spring 32 to always have a tendency to slide upward.
[0044] In some embodiments, the side wall of the lower valve core 22 is provided with a support ring 22d, the support ring 22d is adapted to attach to the end of the valve seat 1 to axially limit the lower valve core 22; in short, in order to prevent the penetration of the first air channel 22a and the abutment of the abutment ring 21b from sliding out of the first ring groove 12, the circumferential position of the lower valve core 22 is limited by providing the support ring 22d on the side wall of the lower valve core 22.
[0045] In some embodiments, the side wall of the upper valve core 21 is provided with a pair of O-rings 21c, which are located above and below the air outlet 11 respectively, to seal the gap between the upper valve core 21 and the valve seat 1; in short, in order to prevent air leakage between the upper valve core 21 and the valve seat 1, a pair of O-rings 21c are provided on the side wall of the upper valve core 21 to ensure air tightness.
[0046] In some embodiments, the valve seat 1 is provided with a second ring groove 13, the second ring groove 13 is in communication with the penetration of the second air channel 21a and the air outlet 11 respectively; in short, the second air channel 21a is a counterbore, and a plurality of penetration holes are provided on the side wall of the counterbore to communicate the second air channel 21a and the second ring groove 13, so that the second air channel 21a, the second ring groove 13 and the air outlet 11 are communicated, and the exhaust pressure relief is completed.
[0047] In some embodiments, the top of the valve seat 1 is provided with an upper valve cover 4, the top of the upper valve cover 4 is threadedly connected with an adjusting block 41, and the upper valve cover 4 is provided with a second spring 42; the end of the upper valve core 21 is provided with a connecting flange 21d, and the second spring 42 is supported between the adjusting block 41 and the connecting flange 21d; in short, in order to adjust the pressure of the upper valve core 21 against the lower valve core 22, the adjusting block 41 is threadedly connected on the upper valve cover 4, and the adjusting block 41 and the connecting flange 21d at the end of the upper valve core 21 are supported by the second spring 42.
[0048] In some embodiments, the end surface of the adjusting block 41 is provided with a tapered centering hole 41a, the abutting end of the second spring 42 and the connecting flange 21d is sleeved with a centering block 43, the end of the centering block 43 is provided with a tapered block 43a, and the tapered block 43a abuts in the centering hole 41a; in short, by cooperation of the tapered block 43a and the centering hole 41a, the end of the second spring 42 is prevented from being deviated, and the upper valve core 21 is stably pressed.
[0049] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0050] In the description of the present application, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, terms such as "first", "second" and other numerical terms are used in this paper, unless otherwise indicated in this paper. Therefore, the first element, component, region, layer or section discussed above can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments.
[0051] Spatially relative terms, such as "inner," "outer," "beneath," "below," "lower," "above," "upper," and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
[0052] In the above discussion, unless otherwise stated, the terms "about," "approximately," "substantially" and the like mean a variation of + / - 10% when used to describe a numerical value.
[0053] With the above ideal embodiments according to the present application as the inspiration, through the above description, relevant personnel can certainly make various changes and modifications without deviating from the technical thought of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of claims.
Claims
1. A high pressure safety valve, characterized in that The utility model relates to a high pressure safety valve, comprising: a valve seat (1) with a side wall having an exhaust port (11) formed therein; a valve core assembly (2) comprising an upper valve core (21) and a lower valve core (22), the upper valve core (21) being slidably arranged in the valve seat (1) and always abutting against the lower valve core (22) in a free state; the lower valve core (22) having a first gas passage (22a) formed therein, the first gas passage (22a) being in communication with a gas source and penetrating through the side wall of the lower valve core (22), and the end of the lower valve core (22) being provided with a sealing member (22b); the upper valve core (21) having a second gas passage (21a) formed therein, the second gas passage (21a) penetrating through the side wall of the upper valve core (21) and being in communication with the exhaust port (11), and the end of the upper valve core (21) being provided with a tapered abutting ring (21b) always abutting against the sealing member (22b); wherein when the pressure of the gas source is too high, the abutting ring (21b) is pushed away from the sealing member (22b), and the gas is discharged from the exhaust port (11) through the second gas passage (21a) to release pressure; after the gas source completes pressure release, the abutting ring (21b) abuts against the sealing member (22b) again.
2. The high pressure safety valve according to claim 1, wherein a first annular groove (12) is formed in the valve seat (1), the first annular groove (12) being in communication with the penetration of the first gas passage (22a) and the abutting position of the abutting ring (21b), respectively.
3. The high pressure safety valve according to claim 1, wherein an installation annular groove (22c) is formed in the end face of the lower valve core (22), and the sealing member (22b) is clamped in the installation annular groove (22c).
4. The high pressure safety valve according to claim 3, wherein the installation annular groove (22c) has a trapezoidal cross section, the sealing member (22b) is annular, and the sealing member (22b) is fitted to the side wall and bottom wall of the installation annular groove (22c).
5. The high pressure safety valve according to claim 1, wherein a lower valve cover (3) is arranged at the bottom of the valve seat (1), the lower valve cover (3) has an air inlet (31) formed therein, and the mouth of the air inlet (31) is provided with a sunken platform to accommodate a first spring (32); the mouth of the first gas passage (22a) is provided with a sunken platform, and the other end of the first spring (32) abuts against the sunken platform of the first gas passage (22a) to always upwardly abut the upper valve core (21) against the lower valve core (22).
6. The high pressure safety valve according to claim 5, wherein a support ring (22d) is arranged on the side wall of the lower valve core (22), and the support ring (22d) is adapted to fit to the end of the valve seat (1) to axially limit the lower valve core (22).
7. The high pressure safety valve according to claim 1, wherein a pair of O-rings (21c) are arranged on the side wall of the upper valve core (21), and the O-rings (21c) are respectively located above and below the exhaust port (11) to seal the gap between the upper valve core (21) and the valve seat (1).
8. The high-pressure safety valve according to claim 1, characterized in that, a second annular groove (13) is formed in the valve seat (1), and the second annular groove (13) is in communication with the through hole of the second gas passage (21a) and the exhaust port (11) respectively.
9. The high-pressure safety valve according to claim 1, characterized in that, an upper valve cover (4) is arranged on the top of the valve seat (1), a threaded hole is formed in the top of the upper valve cover (4), and an adjusting block (41) is screwed into the threaded hole; a second spring (42) is arranged in the upper valve cover (4). an end of the upper valve core (21) is provided with a connecting flange (21d), and the second spring (42) is supported between the adjusting block (41) and the connecting flange (21d).
10. The high-pressure safety valve according to claim 9, characterized in that, an end surface of the adjusting block (41) is provided with a tapered centering hole (41a), a centering block (43) is sleeved on the abutting end of the second spring (42) and the connecting flange (21d), an end of the centering block (43) is provided with a tapered block (43a), and the tapered block (43a) abuts in the centering hole (41a).