Safety valve body casting

Abstract

The utility model discloses a safety valve body casting, and relates to the field of valves. The safety valve body casting comprises a valve body cavity shell, a plurality of flange connecting parts are integrally formed on the valve body cavity shell, a valve seat positioning part is integrally formed on the inner top of the valve body cavity shell, a movable cavity used for sliding of a valve element is formed in the valve seat positioning part, and a penetrating groove is formed in the outer wall of the lower end of the movable cavity. The movable cavity communicates with the interior of the valve body cavity shell through the penetrating groove. According to the safety valve, a valve body casting and a valve seat are inserted into a valve body cavity shell from the lower portion, the top end of the valve seat is inserted into a positioning notch, a valve element piece is installed in a movable cavity from the top to the lower portion, and the valve element piece and the top end of the valve seat are sealed in an inserted mode. A medium outwards enters the valve body cavity shell through the penetrating groove and then is outwards discharged, so that a penetrating fixing stud does not need to be installed outside the valve body cavity shell, the sealing performance of the valve body cavity shell is improved, and meanwhile the installation steps are simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely is a safety valve valve body casting. BACKGROUND

[0002] The safety valve is a valve under normal circumstances in the normally closed state, when the device or the medium pressure in the pipeline rises over the specified value, through the pipeline pressure, the valve element is up, so that the spring is compressed, at this time, through the medium to the system outside discharge to prevent the medium pressure in the pipeline or the device exceeds the safety value, mainly used in the boiler, pressure vessel and pipeline.

[0003] And the existing safety valve when installing, need to install the horn -like valve seat in the valve body, the valve seat top end is connected with the valve element, when the pipeline pressure is big, the valve element moves upward, the medium is discharged from the valve seat top end into the valve body, then from the discharge end of the valve body to the outside, and in actual installation, because the valve seat top end is slender, therefore need to install the stud that penetrates to the inside on the valve body side wall, is connected with the valve seat top end through the stud, fixes the valve seat, avoids its top end deflection, this makes the whole valve body shell sealing property decline, there is the risk of leakage, for this particular provides a kind of safety valve valve body casting to solve above-mentioned problems. SUMMARY

[0004] In view of the deficiencies of prior art, the utility model provides a kind of safety valve valve body casting, solve the existing safety valve when actual installation, because the valve seat top end is slender, therefore need to install the stud that penetrates to the inside on the valve body side wall, is connected with the valve seat top end through the stud, fixes the valve seat, avoids its top end deflection, this makes the whole valve body shell sealing property decline, there is the problem of leakage risk.

[0005] To realize above-mentioned purpose, the utility model is realized by following technical scheme: a kind of safety valve valve body casting, including valve body cavity shell, the valve body cavity shell is integrally formed with multiple flange connecting parts, the inner top of the valve body cavity shell is integrally formed with valve seat positioning part, the inside of the valve seat positioning part is equipped with the movable cavity for the valve element sliding, the lower end outer wall of the movable cavity is equipped with through groove, the movable cavity is connected with the inside of the valve body cavity shell by through groove.

[0006] Preferably, the feed end flange, the discharge end flange and the valve element mounting flange are integrally formed on the outer wall of the valve body cavity shell.

[0007] Preferably, the valve body cavity shell is an oval shell, the feed end flange and the valve element mounting flange are symmetrically arranged at two proximal ends of the oval shell, and the discharge end flange is arranged at one distal end of the oval shell.

[0008] Preferably, the feeding end flange is a large-diameter flange, and an inner bottom of the feeding end flange is provided with a valve seat installation station.

[0009] Preferably, the valve seat positioning portion comprises a positioning pipe integrally formed on the inner bottom of the valve core installation flange, and the through groove and the movable cavity are arranged on the positioning pipe.

[0010] Preferably, a top end of the positioning pipe and the valve core installation flange form a backflush disc installation station, and a top surface of the backflush disc installation station is provided with a downward fixing hole.

[0011] Preferably, a bottom of the positioning pipe is provided with a positioning notch, the positioning notch penetrates upwardly into the movable cavity, and an inner diameter of the movable cavity is greater than an inner diameter of the positioning notch.

[0012] Preferably, an outer wall of a bottom end of the positioning notch is provided with a positioning hole.

[0013] The utility model discloses a safety valve body casting which has the following beneficial effects: a valve seat positioning portion is integrally formed on the inner top of the valve body cavity shell, in use, the valve seat is inserted into the valve body cavity shell from below, the top end of the valve seat is inserted into the positioning notch, the valve core is installed into the movable cavity from the top downward, and the valve core is sealingly inserted into the top end of the valve seat, in use, when the valve core moves upward under pressure, the medium enters the valve body cavity shell through the through groove and is then discharged outward, so that the fixed studs penetrating through the valve body cavity shell are not needed to be installed from the outside, the sealing property of the valve body cavity shell is improved, and the installation steps are simplified. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0015] Fig. 1 It is the whole outer surface structure schematic view of the utility model;

[0016] Fig. 2 It is the valve body cavity shell bottom partial structure sectional view of the utility model;

[0017] Fig. 3 It is the valve body cavity shell internal structure sectional view of the utility model.

[0018] In the figure: 1, valve body cavity shell; 2, feed end flange; 3, discharge end flange; 4, valve core mounting flange; 5, valve seat positioning part; 51, positioning pipe; 52, reverse flushing disc mounting station; 53, fixed hole; 54, through groove; 55, movable cavity; 56, positioning notch; 57, positioning hole. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model is described clearly and completely, obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0020] The safety valve body casting provided in the embodiments of the application solves the problem that the existing safety valve has a slender top end of the valve seat when actually installed, so that a stud penetrating to the inside needs to be installed on the side wall of the valve body, the stud is connected with the top end of the valve seat, the valve seat is fixed, and the top end of the valve seat is prevented from being inclined, which makes the sealing performance of the entire valve body shell decrease and has a leakage risk.

[0021] In order to better understand the above technical scheme, the above technical scheme will be described in detail in combination with the drawings of the specification and specific embodiments.

[0022] The utility model discloses a safety valve body casting.

[0023] According to the drawings Figs. 1-3 As shown, including valve body cavity shell 1, the valve body cavity shell 1 is integrally formed with a plurality of flange connecting parts, the inner top of valve body cavity shell 1 is integrally formed with valve seat positioning part 5, the inside of valve seat positioning part 5 is provided with movable cavity 55 for the sliding of valve core, the lower end outer wall of movable cavity 55 is provided with through groove 54, and movable cavity 55 is connected with the inside of valve body cavity shell 1 through through groove 54.

[0024] Valve seat positioning part 5 includes positioning pipe 51 integrally formed in the bottom of valve core mounting flange 4, through groove 54 and movable cavity 55 are arranged on positioning pipe 51, the bottom of positioning pipe 51 is provided with positioning notch 56, positioning notch 56 penetrates upwards into movable cavity 55, and the inner diameter of movable cavity 55 is greater than the inner diameter of positioning notch 56.

[0025] In use, the valve seat is inserted into the valve body cavity shell 1 from the bottom, and the top end of the valve seat is inserted into the positioning notch 56, and the valve core is installed into the movable cavity 55 from the top, and the valve core is inserted and sealed with the top end of the valve seat, in use, when the valve core moves up under the action of pressure, the medium enters the valve body cavity shell 1 outward through the through groove 54 and then is discharged outward, so that the fixed studs penetrating from the outside of the valve body cavity shell 1 are not needed to be installed, the sealing of the valve body cavity shell 1 is improved, and the installation steps are simplified

[0026] The feed end flange 2, the discharge end flange 3 and the valve core installation flange 4 are integrally formed on the outer wall of the valve body cavity shell 1, the valve body cavity shell 1 is an oval shell, the feed end flange 2 and the valve core installation flange 4 are symmetrically arranged at two proximal ends of the oval shell, and the discharge end flange 3 is arranged at one distal end of the oval shell, so that the valve body cavity shell 1 has a large cavity inside.

[0027] The feed end flange 2 is a large-diameter flange, and the inner bottom of the feed end flange 2 is provided with a valve seat installation station 22, so that the installation operation can be conveniently performed from the bottom to the inside of the valve body cavity shell 1.

[0028] The top end of the positioning pipe 51 and the valve core installation flange 4 form a backflush disc installation station 52, the top surface of the backflush disc installation station 52 is provided with a downward fixing hole 53, and the movement range of the valve core is limited by installing the backflush disc.

[0029] The bottom end outer wall of the positioning notch 56 is provided with a positioning hole 57, the positioning shaft is installed on the outer wall of the valve seat, the positioning shaft is inserted into the positioning hole 57, and the positioning installation of the valve seat is realized.

[0030] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only used to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A safety valve body casting comprising a valve body cavity housing (1) integrally formed with a plurality of flange connections, characterized in that, The inner top of the valve body cavity shell (1) is integrally formed with a valve seat positioning part (5), the inside of the valve seat positioning part (5) is provided with a movable cavity (55) for the sliding of the valve core, the lower end outer wall of the movable cavity (55) is provided with a through groove (54), and the movable cavity (55) is connected with the inside of the valve body cavity shell (1) through the through groove (54).

2. A safety valve body casting according to claim 1, wherein: The flange connection part comprises a feeding end flange (2), a discharging end flange (3) and a valve core mounting flange (4), which are integrally formed on the outer wall of the valve body cavity shell (1).

3. A safety valve body casting according to claim 2, wherein: The valve body cavity shell (1) is an oval shell, the feeding end flange (2) and the valve core mounting flange (4) are symmetrically arranged at two proximal ends of the oval shell, and the discharging end flange (3) is arranged at one distal end of the oval shell.

4. A safety valve body casting according to claim 2, wherein: The feeding end flange (2) is a large-diameter flange, and the inner bottom of the feeding end flange (2) is provided with a valve seat mounting station (22).

5. A safety valve body casting according to claim 2 wherein: The valve seat positioning part (5) comprises a positioning pipe (51) integrally formed on the inner bottom of the valve core mounting flange (4), and the through groove (54) and the movable cavity (55) are arranged on the positioning pipe (51).

6. A safety valve body casting according to claim 5 wherein: The top end of the positioning pipe (51) and the valve core mounting flange (4) form a backflush disc mounting station (52), and the top surface of the backflush disc mounting station (52) is provided with a downward fixing hole (53).

7. A safety valve body casting according to claim 5 wherein: The bottom of the positioning pipe (51) is provided with a positioning notch (56), the positioning notch (56) penetrates upward into the movable cavity (55), and the inner diameter of the movable cavity (55) is greater than the inner diameter of the positioning notch (56).

8. A safety valve body casting according to claim 7, wherein: The bottom end outer wall of the positioning notch (56) is provided with a positioning hole (57).

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