Overflow valve shell

Abstract

The utility model relates to the technical field of overflow valves, in particular to an overflow valve shell which comprises an overflow valve and is characterized in that two limiting rings fixedly arranged on the overflow valve in a sleeving mode and a protective shell detachably connected to the limiting rings are included, and an annular overflow cavity and a recovery cavity are formed in the protective shell in an up-down symmetry mode; an annular overflow cavity is formed in the outer side of the protection shell and right faces an overflow hole of the overflow valve, a plurality of waterproof air holes communicating with the annular overflow cavity are formed in the outer side of the protection shell, a waterproof air-permeable film is arranged on the outer side wall of the annular overflow cavity, and a plurality of connecting holes communicating with the recycling cavity are formed in the bottom of the annular overflow cavity. The overflow valve not only can prevent external dust, moisture and the like from invading, but also cannot influence overflow of the overflow valve, is good in overflow effect, can recover the overflowed fuel oil, and avoids the situation that the overflowed fuel oil cannot be recovered and is wasted.

Description

Technical Field

[0001] The utility model relates to the technical field of overflow valves, in particular to an overflow valve shell. Background Art

[0002] In the hydraulic oil circuit of a fuel engine, the fuel provided by the fuel pump needs to have some margin to ensure that the needs of the rear end can be fully met. The excess fuel needs to be released. In order to release the fuel with a certain pressure, a relief valve is usually set in the hydraulic channel to achieve this. Existing relief valves generally do not have a protective shell. Relief valves without a shell are easily invaded by external objects (such as dust, moisture, etc.), which may cause internal failures and damage to the equipment and shorten the service life of the relief valve.

[0003] Therefore, the existing Chinese patent with authorization announcement number CN219755473U discloses a relief valve housing with a protective structure, including a main body, the main body includes a relief valve, the outer surface of the relief valve is fixedly installed with a reinforcement flange, the outer surface of the relief valve is sleeved with a protective cover mechanism, the top of the protective cover mechanism is clamped with a protective shell, the reinforcement flange includes a mounting flange; the protective cover mechanism includes an upper shell; the protective shell includes a top cover. The utility model increases the relief valve installation structure by reinforcing the flange, improves the convenience of installation of the relief valve, forms a protective structure for the relief valve by the protective cover mechanism, prevents the relief valve from being damaged by impact of objects, cooperates with the protective shell to prevent moisture from dripping onto the relief valve, and is not easily invaded by dust, moisture, etc., thereby avoiding internal failures and damages of the equipment, reducing the corrosion of the relief valve by harsh environments, etc. The relief valve with a protective shell structure can maintain its performance and extend its service life.

[0004] However, in actual applications, the above-mentioned overflow valve housing still has the following problems: although the above-mentioned overflow valve housing blocks the intrusion of external dust, moisture, etc., the sealing environment formed between the upper shell and the lower shell is easy to affect the pressure relief of the overflow hole on the overflow valve, resulting in a reduction in the overflow effect of the overflow valve; in addition, the fuel overflowed in the hydraulic oil circuit cannot be recovered and reused after flowing out from the overflow hole and the flange groove, resulting in serious waste. Utility Model Content

[0005] The purpose of the utility model is to provide a relief valve housing to address the above-mentioned deficiencies, which can block the invasion of external dust, moisture, etc., without affecting the overflow of the relief valve, has a good overflow effect, and can also recover the overflowed fuel, thereby avoiding the waste of the overflowed fuel due to the inability to recover it.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A relief valve housing comprises a relief valve, characterized in that: two limiting rings are fixedly sleeved on the relief valve, and a protective shell is detachably connected to the limiting rings, an annular overflow chamber and a recovery chamber are symmetrically arranged in the protective shell, the annular overflow chamber is arranged opposite to the overflow hole of the relief valve, a plurality of waterproof air holes connected to the annular overflow chamber are arranged on the outside of the protective shell, a waterproof air-permeable membrane is arranged on the outer side wall of the annular overflow chamber, and a plurality of connecting holes connected to the recovery chamber are arranged at the bottom of the annular overflow chamber.

[0008] Furthermore, the protective shell includes a left shell body and a right shell body, and the left shell body and the right shell body are tightened by multiple bolts. The left shell body is provided with a left arc-shaped recess for accommodating the left half of the limiting ring, and the right shell body is provided with a right arc-shaped recess for accommodating the right half of the limiting ring. The left arc-shaped recess and the right arc-shaped recess together form an annular recess.

[0009] Furthermore, an annular groove is provided on the outer arc surface of the limiting ring, a sealing ring is provided in the annular groove, and a sealing ring is provided on the inner arc surface of the annular concave. When the bolts are tightened on the left shell and the right shell, the sealing ring presses the sealing ring tightly in the annular groove.

[0010] Furthermore, the bottom of the protective shell is detachably connected to an oil unloading cover, the bottom of the protective shell is provided with an upper annular recess, the connecting hole is connected to the upper annular recess, the oil unloading cover is provided with a lower annular recess, and the upper annular recess and the lower annular recess together form the recovery chamber.

[0011] Furthermore, an internal thread 1 is arranged on the inner arc surface of the bottom of the protective shell, an external thread 1 is arranged on the outer arc surface, and an external thread 2 that is screwed with the internal thread 1 and an internal thread 2 that is screwed with the external thread 1 are arranged on the oil unloading cover.

[0012] The beneficial effects of the utility model are:

[0013] In actual applications, the protective shell can block the invasion of external dust, moisture, etc. through the waterproof air-permeable holes and the waterproof air-permeable membrane, and will not affect the overflow effect of the overflow valve; the fuel flowing out of the overflow hole of the overflow valve enters the recovery chamber through the connecting hole in the annular overflow chamber for recovery, thereby avoiding the waste of fuel; the utility model can block the invasion of external dust, moisture, etc., and will not affect the overflow of the overflow valve, has a good overflow effect, and can also recover the overflowed fuel, thereby avoiding the waste of the overflowed fuel due to the inability to recover. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2It is a schematic diagram of the structure of the protective shell in the utility model;

[0016] Figure 3 It is a left view of the utility model;

[0017] Figure 4 yes Figure 3 The cross-sectional view at AA in the middle; DETAILED DESCRIPTION

[0018] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a relief valve housing includes a relief valve 1, characterized in that: two limit rings 2 are fixedly mounted on the relief valve 1, and a protective shell 3 is detachably connected to the limit rings 2, an annular overflow chamber 31 and a recovery chamber 32 are symmetrically arranged in the protective shell 3, the annular overflow chamber 31 is arranged opposite to the overflow hole 11 of the relief valve 1, a plurality of waterproof air holes 33 connected to the annular overflow chamber 31 are arranged on the outside of the protective shell 3, a waterproof air-permeable membrane 4 is arranged on the outer wall of the annular overflow chamber 31, and a plurality of connecting holes 34 connected to the recovery chamber 32 are arranged at the bottom of the annular overflow chamber 31.

[0019] When in use, the protective shell 3 can block the invasion of external dust, moisture, etc. through the waterproof air permeable hole 33 and the waterproof air permeable membrane 4, and will not affect the overflow effect of the overflow valve 1; the fuel flowing out of the overflow hole 11 of the overflow valve 1 enters the recovery chamber 32 through the connecting hole 34 in the annular overflow chamber 31 for recovery, thereby avoiding the waste of fuel; the utility model can block the invasion of external dust, moisture, etc., and will not affect the overflow of the overflow valve 1, has a good overflow effect, and can also recover the overflowed fuel, thereby avoiding the waste of the overflowed fuel due to the inability to recover.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the protective shell 3 includes a left shell 301 and a right shell 302, and the left shell 301 and the right shell 302 are tightened by multiple bolts 303. The left shell 301 is provided with a left arc-shaped recess for accommodating the left half of the limiting ring 2, and the right shell 302 is provided with a right arc-shaped recess for accommodating the right half of the limiting ring 2. The left arc-shaped recess and the right arc-shaped recess are combined to form an annular recess. In this embodiment, when in use, the left arc-shaped recess is opposite to the left side of the limiting ring 2, and the right arc-shaped recess is opposite to the right side of the limiting ring 2, and the left shell 301 and the right shell 302 are closed and tightened by the bolts 303.

[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an annular groove is provided on the outer arc surface of the limit ring 2, a sealing ring 21 is provided in the annular groove, and a sealing ring is provided on the inner arc surface of the annular concave, and when the bolt 303 tightens the left shell 301 and the right shell 302, the sealing ring presses the sealing ring 21 tightly in the annular groove; in this embodiment, when the bolt 303 tightens the left shell 301 and the right shell 302, the sealing ring presses the sealing ring 21 tightly in the annular groove, so that a closed environment is formed between the protective shell 3 and the overflow valve 1, and the closed environment is waterproof and breathable through the waterproof air vents 33 and the waterproof air-permeable membrane 4.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the bottom of the protective shell 3 is detachably connected to the oil unloading cover 5, the bottom of the protective shell 3 is provided with an upper annular recess 321, the connecting hole 34 is connected to the upper annular recess 321, and the oil unloading cover 5 is provided with a lower annular recess 322, and the upper annular recess 321 and the lower annular recess 322 together form the recovery chamber 32; in this embodiment, the lower annular recess 322 can be removed by the oil unloading cover 5, so that the fuel recovered in the recovery chamber 32 can be taken out.

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an internal thread 1 is provided on the inner arc surface of the bottom of the protective shell 3, and an external thread 1 is provided on the outer arc surface. The oil unloading cover 5 is provided with an external thread 2 51 screwed with the internal thread 1, and an internal thread 2 52 screwed with the external thread 1. In this embodiment, the oil unloading cover 5 is detachably connected to the bottom of the protective shell 3 by tightening the external thread 1 with the internal thread 1 and tightening the external thread 2 51 with the internal thread 2 52 at the same time.

[0024] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the scope defined by the spirit of the present invention.

Claims

1. A relief valve housing, comprising a relief valve (1), characterized in that: Two limiting rings (2) are fixedly sleeved on the overflow valve (1), and a protective shell (3) is detachably connected to the limiting rings (2); an annular overflow chamber (31) and a recovery chamber (32) are symmetrically arranged in the protective shell (3); the annular overflow chamber (31) is arranged opposite to the overflow hole (11) of the overflow valve (1); a plurality of waterproof vents (33) connected to the annular overflow chamber (31) are arranged on the outer side of the protective shell (3); a waterproof vent membrane (4) is arranged on the outer side wall of the annular overflow chamber (31); and a plurality of connection holes (34) connected to the recovery chamber (32) are arranged at the bottom of the annular overflow chamber (31).

2. A relief valve housing according to claim 1, characterized in that: The protective shell (3) comprises a left shell (301) and a right shell (302), wherein the left shell (301) and the right shell (302) are tightened by a plurality of bolts (303), the left shell (301) is provided with a left arc-shaped recess for accommodating the left half of the limiting ring (2), and the right shell (302) is provided with a right arc-shaped recess for accommodating the right half of the limiting ring (2), and the left arc-shaped recess and the right arc-shaped recess together form an annular recess.

3. A relief valve housing according to claim 2, characterized in that: An annular groove is arranged on the outer arc surface of the limiting ring (2), a sealing ring (21) is arranged in the annular groove, and a sealing ring is arranged on the inner arc surface of the annular concave portion. When the bolts (303) are tightened on the left housing (301) and the right housing (302), the sealing ring presses the sealing ring (21) tightly against the annular groove.

4. The overflow valve housing according to claim 1, characterized in that: The bottom of the protective shell (3) is detachably connected to an oil discharge cover (5), the bottom of the protective shell (3) is provided with an upper annular recess (321), the connecting hole (34) is connected to the upper annular recess (321), the oil discharge cover (5) is provided with a lower annular recess (322), and the upper annular recess (321) and the lower annular recess (322) together form the recovery chamber (32).

5. A relief valve housing according to claim 4, characterized in that: The inner arc surface of the bottom of the protective shell (3) is provided with an internal thread 1, and the outer arc surface is provided with an external thread 1, and the oil discharge cover (5) is provided with an external thread 2 (51) screwed with the inner thread 1, and an internal thread 2 (52) screwed with the external thread 1.

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