Safety valve adjusting ring with recoil groove structure and safety valve

Abstract

The utility model relates to a safety valve adjusting ring with a recoil groove structure and a safety valve. The adjusting ring comprises an adjusting ring body, the adjusting ring body is provided with a center hole cavity, the inner wall of the center hole cavity is provided with a threaded connection section used for being in threaded connection with the guide sleeve, and a plurality of positioning grooves are formed in the outer wall of the adjusting ring body in the circumferential direction at intervals. When the adjusting ring body is used, a back-flushing groove structure is arranged on the end face, facing the valve seat, of the adjusting ring body, the back-flushing groove structure comprises a groove with an outward opening, and a medium flowing out of a medium flow channel hole of the valve seat enters and impacts the groove. The groove of the recoil groove structure and the medium flow channel hole of the valve seat are installed oppositely, a medium rushes out of the medium flow channel hole of the valve seat and enters the groove, then recoil force is increased, and compared with the prior art, the regulated opening height can be achieved easily.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a safety valve regulating ring with a recoil groove structure and a safety valve. Background Art

[0002] Safety valves are mostly used to protect pipelines or pressure vessels of the system. They can automatically open when the medium pressure is too high to discharge the overpressure medium to ensure the safety of the pipeline or pressure vessel. The current safety valve includes a valve body, a valve seat, a guide sleeve, a valve disc, a valve stem and a spring. The valve disc is arranged in the guide sleeve and connected to the valve stem. The valve disc and the valve stem seal the valve seat together under the action of the spring. Under the action of the medium, the valve disc and the valve stem can be opened by the impact of the medium. The valve seat is provided with a medium flow channel hole, and the valve body is provided with a medium outflow hole. An upper adjustment ring is arranged on the outer surface of the valve seat, and a lower adjustment ring is arranged on the valve seat, such as the disclosure of the high-temperature and high-pressure welded safety valve disclosed in the Chinese utility model patent with the authorization announcement number of CN 202646818U. The upper adjustment ring is used to adjust the opening pressure, and the lower adjustment ring is used to adjust the return seat pressure and the discharge pressure. The medium rushes out of the medium flow channel hole on the valve seat and rebounds to the valve disc, thereby increasing the opening height of the safety valve, which is convenient for the rapid discharge of the residual pressure in the pipeline or pressure vessel.

[0003] However, the lower end of the existing upper adjustment ring is a plane, resulting in a small recoil force of the medium. When the safety valve is discharged, no matter how the upper adjustment ring is adjusted, it is difficult to reach the opening height specified in the standard specification. Utility Model Content

[0004] The purpose of the utility model is to provide a safety valve regulating ring with a recoil groove structure to solve the problem in the prior art that the recoil force of the safety valve is small and cannot reach the specified opening height; at the same time, the purpose of the utility model is also to provide a safety valve using the above-mentioned safety valve regulating ring.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a safety valve adjusting ring with a recoil groove structure, comprising an adjusting ring body, the adjusting ring body having a central hole cavity, the inner wall of the central hole cavity being provided with a threaded connection section for threaded connection with a guide sleeve, a plurality of positioning grooves being arranged at intervals along the circumferential direction on the outer wall of the adjusting ring body, the end face of the adjusting ring body facing the valve seat when in use being provided with a recoil groove structure, the recoil groove structure comprising a groove opening outwardly for allowing the medium flowing out of the medium flow channel hole of the valve seat to enter and impact.

[0006] A first sealing ring is arranged on the bottom of the groove, and is used for sealingly cooperating with the second sealing ring on the valve seat to block the medium flow channel hole on the valve seat.

[0007] The longitudinal section of the groove is a trapezoidal groove structure.

[0008] A safety valve of the utility model adopts the following technical scheme: a safety valve comprises a valve body, a valve seat, a guide sleeve, a valve disc, a valve stem and a spring, the valve disc is movably arranged in the guide sleeve and connected to the valve stem, a medium flow channel hole is arranged on the valve seat, a medium outflow hole is arranged on the valve body, an upper adjusting ring is threadedly connected to the outer surface of the valve seat, a lower adjusting ring is threadedly connected to the valve seat, the upper adjusting ring comprises an adjusting ring body, the adjusting ring body has a central hole cavity, a threaded connection section for threaded connection with the guide sleeve is arranged on the inner wall of the central hole cavity, a plurality of positioning grooves are arranged at intervals along the circumferential direction on the outer wall of the adjusting ring body, a recoil groove structure is arranged on the end surface of the adjusting ring body facing the valve seat, the recoil groove structure comprises a groove with an opening facing the valve seat, and is used for medium flowing out of the medium flow channel hole of the valve seat to enter and impact.

[0009] A first sealing ring is arranged on the bottom of the groove, and is used for sealingly cooperating with the second sealing ring on the valve seat to block the medium flow channel hole on the valve seat.

[0010] The longitudinal section of the groove is a trapezoidal groove structure.

[0011] The guide sleeve is a stepped shaft structure, the inner cavity of the guide sleeve is a stepped hole structure, and the valve flap is installed in the small aperture section of the stepped hole structure.

[0012] A heat dissipation sleeve is arranged above the guide sleeve, the inner cavity of the heat dissipation sleeve is communicated with the inner cavity of the guide sleeve, and a steam exhaust outlet communicated with the inner cavity of the heat dissipation sleeve is arranged on the cavity wall of the heat dissipation sleeve.

[0013] The beneficial effects of the utility model are as follows: the groove of the recoil groove structure is relatively arranged and installed with the medium flow channel hole of the valve seat, the medium rushes out from the medium flow channel hole of the valve seat, and the medium enters into the groove, thereby increasing the recoil force, and compared with the prior art, it is very easy to reach the specified opening height. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an embodiment of a safety valve of the utility model;

[0015] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0016] Figure 3 yes Figure 1 Structural diagram of the middle and upper regulating valve;

[0017] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle guide sleeve. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0019] It should be noted that, unless otherwise defined, the technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0020] An embodiment of a safety valve of the utility model is as follows Figure 1-Figure 4 As shown, it includes a valve body 1, a valve seat 2, a guide sleeve 3, a valve disc 4, a valve stem 5 and a spring 6. The valve disc is movably arranged in the guide sleeve and connected to the valve stem. The valve disc and the valve stem can seal the valve seat under the action of the spring, and can also be lifted up by the medium. The valve seat 2 is provided with a medium flow channel hole 11, the valve body 1 is provided with a medium outflow hole 12, the outer surface of the valve seat is threadedly connected with an upper adjustment ring 7, and the valve seat is threadedly connected with a lower adjustment ring 8. The valve body is provided with an upper positioning screw 9 for positioning and fixing the upper adjustment ring, and a lower positioning screw 10 for positioning and fixing the lower adjustment ring.

[0021] The upper adjustment ring 7 includes an adjustment ring body 15, such as Figure 3 As shown, the adjusting ring body has a central cavity 17 for the valve disc to be movably installed, and a threaded connection section 16 for threaded connection with the guide sleeve is arranged on the inner wall of the central cavity, and a threaded section 20 is arranged on the outer wall of the guide sleeve. A plurality of positioning grooves 18 are arranged at intervals along the circumferential direction on the outer wall of the adjusting ring body, which are used to be positioned and matched with the upper positioning screw. In this embodiment, a recoil groove structure is arranged on the end surface of the adjusting ring body facing the valve seat (the lower end surface of the adjusting ring body in the accompanying drawings), and the recoil groove structure includes a groove 19 with an opening facing the valve seat, and the groove is used for the medium flowing out of the medium flow channel hole of the valve seat to enter and impact, which can increase the recoil force of the medium on the upper adjusting ring. A first sealing ring is arranged on the bottom of the groove, which is used to seal and match with the second sealing ring on the valve seat, and is used to block the medium flow channel hole on the valve seat. In this embodiment, the longitudinal section of the groove is a trapezoidal groove structure, and there is a gap 24 between the inner wall of the groove and the lower adjusting groove. A limiting protrusion 23 for limiting and matching with the axis of the guide sleeve is arranged in the central cavity of the adjusting ring body.

[0022] In this embodiment, the guide sleeve 3 is a stepped shaft structure, the inner cavity of the guide sleeve is a stepped hole structure, the small diameter section 21 of the stepped hole structure is arranged on the small diameter section of the stepped shaft structure, and the large diameter section 22 of the stepped hole structure is arranged on the large diameter section of the stepped shaft structure. The valve disc is installed in the small diameter section of the stepped hole structure. A heat dissipation sleeve 13 is arranged above the guide sleeve, and the inner cavity of the heat dissipation sleeve is connected with the inner cavity of the guide sleeve. Specifically, the large diameter section of the stepped hole structure on the guide sleeve is connected with the inner cavity of the heat dissipation sleeve, and a steam exhaust outlet 14 connected with the inner cavity of the heat dissipation sleeve is arranged on the cavity wall of the heat dissipation sleeve. When the safety valve is used in a steam container or pipeline, steam will enter the heat dissipation sleeve through the gap between the valve disc and the guide sleeve. The steam accumulated in the inner cavity of the heat dissipation sleeve can be discharged in time through the steam exhaust outlet, and it is not easy to form back pressure, which is conducive to the opening of the safety valve. On the other hand, the heat dissipation effect is good, which greatly reduces the impact of the steam in the inner cavity of the heat dissipation sleeve on the upper spring, and reduces the influence of temperature on the performance of the safety valve.

[0023] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in this utility model according to the specific circumstances.

[0024] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0025] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0026] In other embodiments of the utility model, a sealing ring may be provided only on the bottom of the groove; a sealing ring may be provided only on the end surface of the valve seat facing the valve disc; and the longitudinal section of the groove may be a rectangular groove structure.

[0027] The embodiment of the safety valve adjusting ring with a recoil groove structure of the utility model has the same structure as the upper adjusting ring in each embodiment of the above-mentioned safety valve, and will not be described in detail here.

Claims

1. A safety valve adjusting ring with a recoil groove structure, comprising an adjusting ring body, the adjusting ring body having a central hole cavity, a threaded connection section for threaded connection with a guide sleeve is arranged on the inner wall of the central hole cavity, and a plurality of positioning grooves are arranged at intervals along the circumferential direction on the outer wall of the adjusting ring body, characterized in that: The end surface of the adjusting ring body facing the valve seat when in use is provided with a recoil groove structure, the recoil groove structure comprising a groove opening outwards for allowing the medium flowing out of the medium flow channel hole of the valve seat to enter and impact.

2. The safety valve regulating ring with a recoil groove structure according to claim 1, characterized in that: A first sealing ring is arranged on the bottom of the groove, and is used for sealingly cooperating with the second sealing ring on the valve seat to block the medium flow channel hole on the valve seat.

3. The safety valve regulating ring with a recoil groove structure according to claim 1, characterized in that: The longitudinal section of the groove is a trapezoidal groove structure.

4. A safety valve, comprising a valve body, a valve seat, a guide sleeve, a valve disc, a valve stem and a spring, wherein the valve disc is movably arranged in the guide sleeve and connected to the valve stem, a medium flow channel hole is arranged on the valve seat, a medium outflow hole is arranged on the valve body, an upper adjustment ring is threadedly connected to the outer surface of the valve seat, a lower adjustment ring is threadedly connected to the valve seat, the upper adjustment ring comprises an adjustment ring body, the adjustment ring body has a central hole cavity, a threaded connection section for threading with the guide sleeve is arranged on the inner wall of the central hole cavity, and a plurality of positioning grooves are arranged at intervals along the circumferential direction on the outer wall of the adjustment ring body, characterized in that: A recoil groove structure is arranged on the end surface of the adjusting ring body facing the valve seat. The recoil groove structure comprises a groove opening toward the valve seat and is used for medium flowing out of the medium flow channel hole of the valve seat to enter and impact.

5. The safety valve according to claim 4, characterized in that: A first sealing ring is arranged on the bottom of the groove, and is used for sealingly cooperating with the second sealing ring on the valve seat to block the medium flow channel hole on the valve seat.

6. The safety valve according to claim 4, characterized in that: The longitudinal section of the groove is a trapezoidal groove structure.

7. The safety valve according to claim 4, characterized in that: The guide sleeve is a stepped shaft structure, the inner cavity of the guide sleeve is a stepped hole structure, and the valve flap is installed in the small aperture section of the stepped hole structure.

8. The safety valve according to any one of claims 4 to 7, characterized in that: A heat dissipation sleeve is arranged above the guide sleeve, the inner cavity of the heat dissipation sleeve is communicated with the inner cavity of the guide sleeve, and a steam exhaust outlet communicated with the inner cavity of the heat dissipation sleeve is arranged on the cavity wall of the heat dissipation sleeve.

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