Oil tank stop valve

Abstract

The utility model relates to the technical field of stop valves, in particular to an oil tank stop valve which comprises an oil tank stop valve body, a positioning disc is arranged at the upper end of the oil tank stop valve body, a floater is clamped in the oil tank stop valve body, a spring clamping groove and an air pushing groove are formed in the lower portion of the floater, and a spring is clamped in the spring clamping groove. A bottom cover is clamped to the bottom of the oil tank stop valve body, a spring clamping base of an integrated structure is arranged at the upper end of the bottom cover, the lower portion of a spring is clamped to the spring clamping base, an air guide hole is formed in the upper portion of the oil tank stop valve body, and a pressure maintaining disc is movably clamped to the position, above the air guide hole, in the oil tank stop valve body. And a sealing gasket is clamped at the upper end of the floater. According to the oil tank stop valve, the bottom cover structure is arranged at the bottom of the valve body, the spring and the floater can be positioned, the positioning disc is fixed to the upper end of the valve body, the spring and the floater are installed from the lower end of the valve body, the position of the floater can be adjusted conveniently, the valve body can be assembled conveniently, and meanwhile the structural strength of the valve body is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stop valve, concretely is a kind of oil tank stop valve. BACKGROUND

[0002] During the oiling process of oil tank, pressure can be formed in oil tank due to evaporation of oil, if the pressure at this time cannot be discharged in time, the pressure in oil tank will increase sharply, so that oiling cannot be carried out, and frequent gun jumping occurs, therefore, an oil tank stop valve is installed on the oil tank, during the oiling process, the pressure in the oil tank is discharged to the carbon tank, to avoid the situation that the pressure in the oil tank is too large and oiling cannot be carried out. The oil tank stop valve is in a long-pass state, maintains the pressure balance of the oil tank, and maximizes the height difference between the oil tank and the FLVV, to ensure normal ventilation of the system. At the same time, it ensures that the fuel in the oil tank does not leak out under extreme conditions, avoids causing personal and property safety problems, ensures that the pressure accumulated in the oil tank under the condition of vehicle rollover and re-centering can be discharged again, prevents the risk caused by oil tank bulging, the greater the opening pressure of the disc, the smaller the gun replenishment, and the stronger the dynamic leakage suppression ability.

[0003] The existing oil tank stop valve is usually composed of a valve body, a float, a disc and a sealing element. When the pressure in the oil tank increases, the float is floated by the pressure, and the air pressure pushes the disc to open until the disc is closed after the float is floated to the top. The built-in rotary valve disclosed in the publication No. CN217177570U makes the structure in the valve body compact, improves the space utilization of the oil tank, and the oil tank stop valve is composed of a valve body and a flange plate to form an external positioning structure. However, after the float, spring and sealing element are installed to the valve body, the valve body is packaged by the flange plate, and during the assembly of the valve body, the valve body only has an upper end opening, which limits the installation space and is not convenient for adjusting the position of the float. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide an oil tank stop valve to solve the problem that the existing oil tank stop valve on the market is composed of a valve body and a flange plate to form an external positioning structure, but after the float, spring and sealing element are installed to the valve body, the valve body is packaged by the flange plate, and during the assembly of the valve body, the valve body only has an upper end opening, which limits the installation space and is not convenient for adjusting the position of the float.

[0005] To achieve the above object, the utility model provides the following technical scheme: an oil tank stop valve, including oil tank stop valve main part, the oil tank stop valve main part upper end is equipped with the locating disc, and the oil tank stop valve main part is in the snap -fit with the float, the spring slot and the gas pushing groove are established below the float, and the spring is in the snap -fit in spring slot, the bottom cap is connected with the bottom cap of oil tank stop valve main part, and the bottom cap upper end is equipped with the spring clamping seat of integral structure, and the spring is below the spring clamping seat, the oil tank stop valve main part top is provided with the gas guide hole, and the oil tank stop valve main part is in the movable snap -fit with the pressure -retaining disc in the gas guide hole upper side position, the sealing pad is snap -fit with the upper end of the float, and the upper end of the float is still connected with the U type lock catch for the fastening of sealing pad, and the sealing pad corresponds with the position of gas guide hole, the locating disc is equipped with the disc limit seat of corresponding position with the pressure -retaining disc, and the side of locating disc is communicated with the connecting branch pipe.

[0006] Preferably, the oil tank stop valve main part is provided with a groove corresponding to the position of the sealing pad below the gas guide hole, and a limiting groove is symmetrically provided below the oil tank stop valve main part, and locking holes are also uniformly and interval provided on the side below the oil tank stop valve main part.

[0007] Preferably, a sealing ring is fixedly sleeved on the opening part of the upper end of the oil tank stop valve main part, and a fastening seat is also integrally provided on the side position above the oil tank stop valve main part.

[0008] Preferably, the locating disc is integrally provided with a symmetrically structured clamping frame at the lower end, a clamping hole is provided on the clamping frame for clamping cooperation with the fastening seat, and a reinforcing rib is also integrally provided on the outer side between the clamping frame and the locating disc.

[0009] Preferably, the bottom cap is provided with an exhaust hole at the bottom, and one of the exhaust holes is located in the spring clamping seat.

[0010] Preferably, the bottom cap is provided with an integral structure of clamping protrusion and limiting protrusion, and the clamping protrusion and the limiting protrusion correspond to the position of the locking hole and the limiting groove respectively, and the clamping protrusion is clamped and fastened with the locking hole.

[0011] Compared with the prior art, the oil tank stop valve has the following advantages: the bottom cap structure is provided at the bottom of the valve body, the positioning of the spring and the float is realized, the locating disc is fixed on the upper end of the valve body, the spring and the float are installed from the lower end of the valve body, the position of the float is adjusted, the assembly of the valve body is facilitated, and the structural strength of the valve body is ensured. The spring is clamped into the float, the spring is fixed by the bottom cap, the positioning of the float is realized by locking the bottom cap and the valve body, and the positioning structure does not need to be disassembled during maintenance, which is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1The utility model discloses an exploded view of oil tank stop valve,

[0013] Figure 2 The utility model discloses an isometric view of oil tank stop valve,

[0014] Figure 3 The utility model discloses an external front view of oil tank stop valve,

[0015] Figure 4 The utility model discloses a sectional structure schematic view of oil tank stop valve,

[0016] Figure 5 The utility model discloses a pressure -maintaining disc mounting position structure schematic view of oil tank stop valve,

[0017] Figure 6 The utility model discloses an external side view of oil tank stop valve,

[0018] Figure 7 The utility model discloses an external top view of oil tank stop valve.

[0019] In the drawing: 1, oil tank stop valve main part; 101, fastening seat; 102, limit groove; 103, locking hole; 104, gas guide hole; 2, sealing ring; 3, pressure -maintaining disc; 4, positioning disc; 401, connecting branch pipe; 402, clamping frame; 403, clamping hole; 404, reinforcing rib; 405, disc limit seat; 5, bottom cover; 501, clamping protruding; 502, limit protruding; 503, exhaust hole; 504, spring clamping seat; 6, spring; 7, float; 701, spring clamping groove; 702, push gas groove; 8, sealing pad; 9, U type lock catch. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only 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 those skilled in the art without creative work belong to the protection scope of the utility model.

[0021] Please refer to Figures 1-7The utility model provides a technical scheme: an oil tank stop valve, including oil tank stop valve main part 1, oil tank stop valve main part 1 upper end is equipped with the locating disc 4, and oil tank stop valve main part 1 is in the clamping of floater 7, is equipped with spring clamping groove 701 and push air groove 702 under floater 7, and spring clamping groove 701 is in the clamping of spring 6, and oil tank stop valve main part 1 bottom is connected with bottom cover 5, through the setting of bottom cover 5, make spring 6 and floater 7 install from oil tank stop valve main part 1 bottom, there is enough installation space, when overhauling oil tank stop valve main part 1, do not disassemble locating disc 4, it is more convenient, and bottom cover 5 upper end is equipped with the spring clamping seat 504 of integral structure, and spring 6 is clamped on spring clamping seat 504 under, bottom cover 5 bottom is equipped with the vent hole 503, and one of vent hole 503 is located in spring clamping seat 504, this structure is positioned to spring 6 and floater 7 through bottom cover 5 and makes gas can enter oil tank stop valve main part 1 through vent hole 503, when oiling to oil tank stop valve main part 1 position, floater 7 is completely raised, and the gas guide hole 104 is blocked by sealing washer 8, realizes the closure of pressure -retaining disc 3, avoids exhaust, simultaneously prevents fuel leakage, and reaches the effect of oiling cut -off, oil tank stop valve main part 1 top is provided with the gas guide hole 104, and oil tank stop valve main part 1 is in the gas guide hole 104 upper position and is clamped with pressure -retaining disc 3, oil tank stop valve main part 1 is in the gas guide hole 104 lower position and is provided with the recess corresponding with the position of sealing washer 8, and oil tank stop valve main part 1 lower symmetry is equipped with the limiting groove 102, and oil tank stop valve main part 1 lower side is also evenly spaced and is equipped with locking hole 103, this structure makes oil tank stop valve main part 1 when working, the gas is discharged from oil tank stop valve main part 1 due to the pressure increase in oil tank, and the gas is acted on pressure -retaining disc 3 through the gas guide hole 104, makes pressure -retaining disc 3 open, realizes exhaust treatment, oil tank stop valve main part 1 is through the recess under the gas guide hole 104 to sealing washer 8 and carries out movable limit, let sealing washer 8 can be blocked after completely rising gas guide hole 104, floater 7 upper end is clamped with sealing washer 8, and floater 7 upper end still is connected with the U type lock 9 for sealing washer 8 fastening, and sealing washer 8 and gas guide hole 104 position correspond, oil tank stop valve main part 1 upper end opening position is set with sealing ring 2, and oil tank stop valve main part 1 upper side position still is equipped with the fastening seat 101 of integral structure, this structure oil tank stop valve main part 1 is sealed with locating disc 4 through sealing ring 2, and locating disc 4 is used for the installation positioning treatment of oil tank stop valve main part 1 on oil tank, and makes oil tank stop valve main part 1 through connecting branch pipe 401 and pipeline and connects, realizes exhaust treatment, locating disc 4 is equipped with the disc limiting seat 405 corresponding with the position of pressure -retaining disc 3 in, and locating disc 4 side is connected with connecting branch pipe 401, and locating disc 4 lower end is integrally equipped with the clamping frame 402 of symmetrical structure, and clamping frame 402 is equipped with the clamping hole 403 of clamping cooperation with fastening seat 101 on,And the outer side between the clamping frame 402 and the positioning disc 4 is also provided with a reinforcing rib 404 of integral structure, which is integrally formed with the positioning disc 4, the reinforcing rib 404, the clamping frame 402 and the reinforcing rib 404, and forms a clamping hole 403, so that the positioning disc 4 can fix the upper end of the positioning disc 4 and realize the movable limiting of the pressure maintaining disc 3, and ensure the overall structural strength of the oil tank stop valve body 1. The outer circle of the bottom cover 5 is provided with a clamping protrusion 501 and a limiting protrusion 502 of integral structure, and the clamping protrusion 501 and the limiting protrusion 502 are respectively corresponding to the locking hole 103 and the limiting groove 102, and the clamping protrusion 501 is clamped and fastened with the locking hole 103. This structure makes the bottom cover 5 can be smoothly clamped into the bottom of the oil tank stop valve body 1 through the cooperation of the limiting protrusion 502 and the limiting groove 102, and through the cooperation of the clamping protrusion 501 and the locking hole 103, the bottom cover 5 realizes the bottom sealing treatment of the oil tank stop valve body 1.

[0022] Working principle: when using the oil tank stop valve, first, the pressure maintaining disc 3 is clamped in the oil tank stop valve body 1, then the port part of the oil tank stop valve body 1 is inserted with the positioning disc 4, the connecting part is sealed by the sealing ring 2, the pressure maintaining disc 3 is positioned by the disc limiting seat 405 to control the maximum opening position of the pressure maintaining disc 3, the clamping frame 402 is clamped on both sides of the oil tank stop valve body 1, the locking treatment of the oil tank stop valve body 1 and the positioning disc 4 is carried out through the cooperation of the clamping hole 403 and the fastening seat 101, the reinforcing rib 404 is used to ensure the structural strength of the positioning disc 4 to prevent the connection from loosening, the sealing gasket 8 is clamped on the float 7 and locked by the U-shaped lock 9, the spring 6 is clamped in the float 7 through the spring clamping groove 701, the lower end of the spring 6 is clamped and fastened on the spring clamping seat 504, the float 7 is clamped into the oil tank stop valve body 1, the sealing gasket 8 corresponds to the position of the air guide hole 104, the bottom cover 5 is positioned by the cooperation of the limiting protrusion 502 and the limiting groove 102, after the bottom cover 5 is completely clamped into the oil tank stop valve body 1, the clamping protrusion 501 is locked into the locking hole 103, at this time, the float 7 moves in the oil tank stop valve body 1, and the spring 6 is used for shock absorption and noise reduction when the float 7 falls, the oil tank stop valve body 1 is installed on the oil tank through the positioning disc 4 and connected with the pipeline for exhaust by the connecting branch pipe 401, during the oil filling process of the oil tank, the gas pressure in the oil tank increases, the gas enters the oil tank stop valve body 1 through the exhaust hole 503, part of the gas directly exhausts through the air guide hole 104, and pushes the pressure maintaining disc 3 to open, realizing the exhaust treatment, the other part of the gas enters the air pushing groove 702 and pushes the float 7 to float up, after the float 7 rises to the highest position, the sealing gasket 8 blocks the air guide hole 104 to prevent fuel leakage, thereby completing a series of work.

[0023] Although the utility model has been explained in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An oil tank shut-off valve comprising an oil tank shut-off valve body (1), characterized by: The oil tank stop valve body (1) upper end is equipped with a positioning disc (4), and the oil tank stop valve body (1) is engaged with a float (7), the lower part of the float (7) is provided with a spring clamping groove (701) and a gas pushing groove (702), and the spring clamping groove (701) is engaged with a spring (6), the bottom of the oil tank stop valve body (1) is clamped with a bottom cover (5), and the upper end of the bottom cover (5) is provided with a spring clamping seat (504) of an integral structure, and the lower part of the spring (6) is clamped on the spring clamping seat (504), the upper part of the oil tank stop valve body (1) is provided with a gas guide hole (104), and the oil tank stop valve body (1) is movably clamped with a pressure maintaining disc (3) above the gas guide hole (104), the upper end of the float (7) is clamped with a sealing gasket (8), and the upper end of the float (7) is also clamped with a U-shaped lock (9) for fastening the sealing gasket (8), and the sealing gasket (8) corresponds to the position of the gas guide hole (104), the positioning disc (4) is provided with a disc limiting seat (405) corresponding to the position of the pressure maintaining disc (3), and the side of the positioning disc (4) is communicated with a connecting branch pipe (401).

2. A tank shut-off valve according to claim 1, characterized in that: The oil tank stop valve body (1) is provided with a groove corresponding to the position of the sealing gasket (8) below the gas guide hole (104), and the lower part of the oil tank stop valve body (1) is symmetrically provided with a limiting groove (102), and the side of the lower part of the oil tank stop valve body (1) is also uniformly and interval provided with a locking hole (103).

3. An oil tank shut-off valve according to claim 2, characterized in that: The upper end opening part of the oil tank stop valve body (1) is sleeved with a sealing ring (2), and the upper side of the oil tank stop valve body (1) is also provided with a fastening seat (101) of an integral structure.

4. An oil tank shut-off valve according to claim 3, characterized in that: The lower end of the positioning disc (4) is integrally provided with a clamping frame (402) of a symmetrical structure, the clamping frame (402) is provided with a clamping hole (403) matched with the fastening seat (101), and the outer side between the clamping frame (402) and the positioning disc (4) is also provided with a reinforcing rib (404) of an integral structure.

5. A tank shut-off valve according to claim 1, characterized in that: The bottom cover (5) is provided with an exhaust hole (503), and one of the exhaust holes (503) is located in the spring clamping seat (504).

6. An oil tank shut-off valve according to claim 2, characterized in that: The outer ring of the bottom cover (5) is provided with a clamping protrusion (501) and a limiting protrusion (502) of an integral structure, the clamping protrusion (501) and the limiting protrusion (502) correspond to the positions of the locking hole (103) and the limiting groove (102) respectively, and the clamping protrusion (501) is clamped and fastened with the locking hole (103).

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