CN111098704A

CN111098704A - Combined valve

Info

Publication number: CN111098704A
Application number: CN202010115319.4A
Authority: CN
Inventors: 李冬梅; 田新仿; 孙海鑫; 李艮春; 焦磊
Original assignee: Jiangsu Olive Sensors High Tech Co ltd
Current assignee: Jiangsu Olive Sensors High Tech Co ltd
Priority date: 2020-02-25
Filing date: 2020-02-25
Publication date: 2020-05-05

Abstract

The invention discloses a combined valve in the field of automobile oil tanks, which comprises a valve body arranged in an oil tank, wherein the top of the valve body is provided with a first exhaust hole and a second exhaust hole which are communicated with the inside and the outside of the oil tank, a first valve member for realizing the opening and closing of the first exhaust hole and a second valve member for realizing the opening and closing of the second exhaust hole are arranged in the valve body, the first valve member is elastically arranged in the valve body through a first spring and is lifted to open and close the first exhaust hole, a concave table is arranged on the side part of the first valve member, the second valve member is elastically arranged on the concave table through a second spring and is lifted to open and close the second exhaust hole, and the first valve member firstly closes the first exhaust hole along with the rising of the liquid level in the oil tank.

Description

Combined valve

Technical Field

The invention relates to an automobile oil tank, in particular to a combination valve.

Background

The combined valve is a hydraulic device with the functions of unloading, safety, check and the like, combines a plurality of valves used on an automobile fuel tank, and has the advantages of high integration degree, small volume, compact structure, good sealing property, large flow capacity and long service life, so the combined valve is widely applied to an automobile oil supply device.

Disclosure of Invention

The invention aims to provide a combination valve, which can work more efficiently and reliably.

The purpose of the invention is realized as follows: the utility model provides a combination valve, is including installing the valve body in the oil tank, inside and outside first exhaust hole and the second exhaust hole of intercommunication oil tank are seted up at the top of valve body, be provided with the second valve member that is used for realizing the first valve member of first exhaust hole switching and realizes the second exhaust hole switching in the valve body, first valve member is set up in the valve body by elasticity through first spring, and comes to carry out the switching to first exhaust hole through going up and down, the lateral part processing of first valve member has the concave station, the second valve member is set up by elasticity through the second spring on the concave station, and comes to carry out the switching to the second exhaust hole through going up and down, and along with the rising of liquid level in the oil tank, first valve member is closed first exhaust hole earlier, and the second valve member is closed the second exhaust hole again, the sectional area of first exhaust hole is greater than the sectional area.

When the oil level control device works, when the liquid level in the oil tank rises, the first valve piece rises under the action of buoyancy and the elastic force of the first spring firstly to close the first exhaust hole, if the oil level continues to rise, the second valve piece rises under the action of buoyancy and the elastic force of the second spring, and then closes the second exhaust hole, and meanwhile, the second valve piece can close the second exhaust hole when a vehicle topples and turns over; the sectional area of the first exhaust port is large, so that the exhaust rate of an oil tank in the process of refueling is ensured, along with the rising of a refueling liquid level, when the oil reaches a required liquid level, the first valve closes the first exhaust port to limit the first exhaust port to continue exhausting, along with the occurrence of conditions such as thermal expansion or inclination of the fuel and the like, the second exhaust port with a small relative area of the oil continues rising, and when the oil reaches a certain liquid level, the second valve closes the second exhaust port to limit the second exhaust port to continue exhausting; the second valve part is partially or completely overlapped on the first valve part; compared with the prior art, the invention has the beneficial effects that: the invention can realize the functions of the first valve piece and the second valve piece by a single valve body, has smaller volume and saves the installation space.

As a further limitation of the present invention, a normally closed valve for opening and closing the second exhaust hole from the top is disposed at the top of the valve body, the normally closed valve includes a valve cap disposed at the periphery of the second exhaust hole, a vent hole is disposed at the top of the valve cap, a sealing plug is disposed in the valve cap, the sealing plug is elastically pressed on the top of the valve body by a third spring and closes the second exhaust hole, and a gap is left between the periphery of the sealing plug and an inner ring of the valve cap. Through setting up the normally closed valve, can realize that inside and outside pressure is balanced under the confined condition of first exhaust hole, when refueling, internal pressure is too high, and external pressure is low, and the sealing plug is backed down to inside pressure this moment for inside pressure is discharged from the clearance between sealing plug and the valve cap inner circle, realizes inside and outside pressure balance. The pressure-maintaining valve at the upper portion of the second vent port opens after the tank pressure increases beyond a predetermined value, thereby simultaneously limiting the amount of fuel added and preventing over-pressurization of the tank.

As a further limitation of the present invention, a one-way valve capable of ventilating from top to bottom is disposed in the center of the sealing plug, an inner concave table is disposed in the center of the bottom of the sealing plug, the one-way valve is disposed on the inner concave table, the one-way valve includes a mushroom-shaped rubber valve sheet disposed in the center of the inner concave table, a plurality of air supply holes are disposed on the sealing plug around the periphery of the mushroom-shaped rubber valve sheet, and the mushroom-shaped rubber valve sheet seals the air supply holes from the bottom of the inner concave table. When the external pressure of the oil tank is higher than the internal pressure, the mushroom-shaped rubber valve plate is pushed open by the pressure, so that a gap is formed between the mushroom-shaped rubber valve plate and the bottom surface of the sealing plug, the external air inlet is realized, and the pressure balance is realized. The bottom of a sealing plug in a pressure retaining valve at the upper part of the second exhaust port is provided with a plurality of air supplementing holes, and when the internal pressure of the oil tank is smaller than the pressure of the upper part of a rubber mushroom piece arranged on the sealing plug along with the working of an oil pump in the oil tank or the desorption of an engine and the like, the rubber mushroom valve piece is stressed downwards to be opened, the air outside the oil tank is supplemented into the oil tank, so that the balance of the internal pressure and the external pressure of the oil tank is realized, and the negative.

In order to support the mushroom-shaped rubber valve plate conveniently, a plurality of supporting claws are arranged on the periphery of the second exhaust hole.

As a further limitation of the invention, the bonnet includes a support ring, on the top of which a cap is sleeved, the cap being snap-fitted on the support ring. The valve cap structure is simpler, and the assembly is more convenient.

In order to make it more reliable for the first valve member to close the first venting orifice, said first valve member comprises a sealing gasket arranged on top of the first float.

In order to make the assembly of sealing gasket more convenient, sealing gasket is made by flexible material, sealing gasket is "worker" font for the cross-section, the top of first float be provided with sealing gasket complex spout, sealing gasket sliding insertion set up in the spout.

In order to improve the sealing performance of the first valve member for closing the first exhaust hole, the top of the sealing gasket is processed into a horn-shaped structure.

As a further limitation of the present invention, the second valve member includes a valve sheet provided on a top of the second float, the valve sheet being configured to close the second vent hole.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

FIG. 2 is a top view of the present invention.

Fig. 3 is a sectional view taken along a-a in fig. 2.

Fig. 4 is an enlarged view of fig. 3 at B.

Fig. 5 is a schematic view of the sealing plug of the present invention.

FIG. 6 is a schematic perspective view of the FLVV and GVV valves of the present invention.

FIG. 7 is a schematic diagram of the FLVV float of the present invention.

The air-conditioning valve comprises a valve body 1, a first exhaust hole 1a, a second exhaust hole 1b, a 2FLVV floater, a sliding groove 2a, a concave table 2b, a sealing gasket 3, a first spring 4, a floater 5GVV 6, a valve plate 7, a second spring 7, a normally closed valve 8, a support ring 8a, a cap 8b, a sealing plug 8c, an air supplementing hole 8c-1, a concave table 8c-2, a third spring 8d, a mushroom-shaped rubber valve plate 8e, a support claw 8f and a buckle 8 g.

Detailed Description

The invention is further described below in conjunction with specific embodiments in which the first valve element is an FLVV valve and the second valve element is an GVV valve.

As shown in fig. 1-7, a combination valve comprises a valve body 1 installed in an oil tank, a first vent hole 1a and a second vent hole 1b communicating the inside and the outside of the oil tank are opened at the top of the valve body 1, an FLVV valve for opening and closing the first vent hole 1a and an GVV valve for opening and closing the second vent hole 1b are arranged in the valve body 1, the FLVV valve is elastically arranged in the valve body 1 through a first spring 4 and is matched with the buoyancy of oil to open and close the first vent hole 1a through lifting, a concave platform 2b is processed at the side part of the FLVV valve, a GVV valve is elastically arranged on the concave platform 2b through a second spring 7, when a vehicle falls, the second vent hole 1b can be blocked through the second spring 7, after the vehicle turns over, the second vent hole 1b can be blocked under the action of gravity, the FLVV valve firstly closes the first vent hole 1a along with the rising of the liquid level in the oil tank, the FLVV valve comprises a sealing gasket 3 arranged at the top of a float 2, the sealing gasket 3 is used for sealing the first vent hole 1a, the sealing gasket 3 is made of a flexible material, the sealing gasket 3 is I-shaped in cross section, a sliding groove 2a matched with the sealing gasket 3 is formed in the top of the FLVV floater 2, the sealing gasket 3 is slidably inserted into the sliding groove 2a, the top of the sealing gasket 3 is processed into a horn-shaped structure, the horn-shaped structure is similar to a sucker, and after the first vent hole 1a is closed, the sealing of the first vent hole 1a is facilitated, the GVV valve comprises a valve sheet 6 arranged at the top of the GVV floater 5, the valve sheet 6 is used for sealing the second vent hole 1b, and the valve sheet 6 can easily open the second vent hole 1b after the second vent hole 1b is closed;

the top of the valve body 1 is provided with a normally closed valve 8 for realizing the opening and closing of the second exhaust hole 1b from the top, the normally closed valve 8 comprises a valve cap arranged at the periphery of the second exhaust hole 1b, the top of the valve cap is provided with a vent hole, a sealing plug 8c is arranged in the valve cap, the sealing plug 8c is elastically pressed at the top of the valve body 1 through a third spring 8d and seals the second exhaust hole 1b, a gap is reserved between the periphery of the sealing plug 8c and the inner ring of the valve cap, the center of the sealing plug 8c is provided with a one-way valve which can ventilate from top to bottom, the center of the bottom of the sealing plug 8c is provided with an inner concave table 8c-2, the one-way valve is arranged on the inner concave table 8c-2 and comprises a mushroom-shaped rubber valve sheet 8e arranged at the center of the inner concave table 8c-2, and the, the mushroom-shaped rubber valve plate 8e seals the air supply hole 8c-1 from the bottom of the inner concave table 8c-2, the periphery of the second exhaust hole 1b is provided with a plurality of supporting claws 8f, the valve cap comprises a supporting ring 8a, the top of the supporting ring 8a is sleeved with a cap 8b, and the cap 8b is clamped on the supporting ring 8a through a buckle 8 g.

When the invention works, when the liquid level in the oil tank rises, the FLVV valve rises under the action of buoyancy and the elasticity of the first spring 4 first to seal the first exhaust hole 1a, if the oil level continues to rise, the GVV valve rises under the action of buoyancy and the elasticity of the second spring 7 again to seal the second exhaust hole 1b, meanwhile, the GVV valve can seal the second exhaust hole 1b when the vehicle is toppled and overturned, and when oil is filled, the internal pressure is too high, the external pressure is low, the internal pressure now pushes the sealing plug 8c open, so that the internal pressure is discharged from the gap between the sealing plug 8c and the inner ring of the bonnet, the balance of the internal pressure and the external pressure is realized, when the external pressure of the oil tank is higher than the internal pressure, the mushroom-shaped rubber valve plate 8e is pushed open by the pressure, so that a gap is formed between the mushroom-shaped rubber valve plate 8e and the bottom surface of the sealing plug 8c, and therefore air is sucked from the outside to the inside, and pressure balance is achieved.

The present invention is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.

Claims

1. The utility model provides a combination valve, is including installing the valve body in the oil tank, inside and outside first exhaust hole and the second exhaust hole of intercommunication oil tank are seted up at the top of valve body, its characterized in that, be provided with the first valve member that is used for realizing first exhaust hole switching in the valve body and realize the second valve member of second exhaust hole switching, first valve member is set up in the valve body by elasticity through first spring, and comes to open and close first exhaust hole through going up and down, the lateral part processing of first valve member has the concave station, the second valve member is set up by elasticity through the second spring on the concave station, and comes to open and close the second exhaust hole through going up and down, along with the rising of liquid level in the oil tank, first valve member is closed first exhaust hole earlier, and the second valve member is closed the second exhaust hole again, the sectional area of first exhaust hole is greater than the sectional area of second exhaust hole.

2. The combination valve of claim 1, wherein the top of the valve body is provided with a normally-closed valve for opening and closing the second vent hole from the top, the normally-closed valve comprises a valve cap arranged on the periphery of the second vent hole, the top of the valve cap is provided with a vent hole, a sealing plug is arranged in the valve cap, the sealing plug is elastically pressed on the top of the valve body through a third spring and seals the second vent hole, and a gap is reserved between the periphery of the sealing plug and the inner ring of the valve cap.

3. A combination valve according to claim 2, wherein the centre of the sealing plug is provided with a one-way valve which can vent from above downwards.

4. The combination valve of claim 3, wherein the bottom center of the sealing plug is provided with an inner concave platform, the one-way valve is arranged on the inner concave platform, the one-way valve comprises a mushroom-shaped rubber valve plate arranged at the center of the inner concave platform, the sealing plug is provided with a plurality of air supply holes around the periphery of the mushroom-shaped rubber valve plate, and the mushroom-shaped rubber valve plate seals the air supply holes from the bottom of the inner concave platform.

5. A combination valve according to claim 4, wherein the second vent hole is peripherally provided with a plurality of support claws.

6. A combination valve according to any of claims 2-4, wherein the bonnet comprises a support ring on the top of which a cap is fitted, the cap snap-fitting onto the support ring.

7. A combination valve according to any of claims 1 to 5, wherein the first valve member includes a gasket disposed on top of the first float to close the first vent opening.

8. A combination valve according to claim 7, wherein the gasket is made of a flexible material, the gasket is H-shaped in cross-section, a sliding groove is formed in the top of the first float and is matched with the gasket, and the gasket is slidably inserted into the sliding groove.

9. A combination valve according to claim 8, wherein the top of the gasket is flared.

10. A combination valve according to any of claims 1 to 5, wherein the second valve member comprises a flap disposed on top of the second float, the flap being arranged to close the second vent opening.