Oil tank safety valve convenient to use

Abstract

The utility model relates to an oil tank safety valve convenient to use, which comprises a connecting seat, the bottom end of the connecting seat is fixedly arranged on the top wall of an oil tank in a penetrating manner, a first connecting structure is arranged above the connecting seat, and a second connecting structure is arranged above the first connecting structure. The bottom of the second connecting structure is fixedly connected with an air pressure balance pipe, the bottom end of the air pressure balance pipe is sleeved with a rubber pipe, and a sealing part is integrally formed at the end, away from the air pressure balance pipe, of the rubber pipe. When the oil tank falls down, oil in the oil tank flows to the position where the rubber pipe is cut and provided with the crack, at the moment, the rubber pipe is extruded by the oil, the side walls of the two sides of the crack are tightly attached, the oil cannot penetrate through the crack to enter the rubber pipe, and therefore the purpose that when the oil tank falls down, the oil is prevented from being discharged through the air pressure balance hole, and oil leakage is avoided is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, concretely relates to a kind of oil tank safety valve of convenient use. BACKGROUND

[0002] Oil tank is a kind of sealed storage equipment for storing liquid oil, generally its top is equipped with oil pumping device, it is convenient to extract the oil stored in oil tank and use, since oil tank is strong in sealing, when oil in oil tank is extracted, the air pressure in oil tank gradually reduces, thus safety valve needs to be installed on oil tank to balance the air pressure in oil tank.

[0003] Although the existing safety valve can deliver air to oil tank through the airflow channel arranged in it to achieve the purpose of balancing the air pressure of oil tank, when oil tank is tilted, the oil stored in oil tank is also easy to leak through the airflow channel, resulting in waste of oil, which is inconvenient for users to use. INVENTION CONTENTS

[0004] The utility model discloses a kind of oil tank safety valve of convenient use, which is simple in structure and reasonable in design, to solve the above-mentioned problems.

[0005] The utility model discloses the above-mentioned purposes are realized by the following technical solutions:

[0006] A kind of oil tank safety valve of convenient use, including the bottom fixedly penetrating the connecting seat on the top wall of oil tank, first connection structure is arranged on the connecting seat, second connection structure is arranged above first connection structure, air pressure balance pipe is fixedly connected in the bottom of second connection structure, the rubber tube is sleeved in the bottom of air pressure balance pipe, the sealing portion is integrally formed in the end of rubber tube away from air pressure balance pipe, the rubber tube is close to the end of sealing portion and is split into two cracks by art knife, and the bottom of rubber tube extends into oil tank by penetrating the connecting seat.

[0007] As a further optimization scheme of the utility model, internal thread is formed on the inner wall of the connecting seat, first connection structure includes external thread joint arranged above the connecting seat, the bottom of external thread joint is fixedly connected with the connecting seat by internal thread, and internal thread joint is integrally formed on the top of external thread joint.

[0008] As a further optimization scheme of the utility model, the adjacent end between the external thread joint and the internal thread joint is fixedly connected with the screwing plate, the screwing plate is regular hexagon structure, and the side length of the screwing plate is set according to the size of standard nut.

[0009] As a further optimization scheme of the utility model, the center of the screwing plate is provided with through hole corresponding to the inner cavity of the external thread joint and the internal thread joint, and the inner diameter of the through hole is greater than the outer diameter of the rubber tube.

[0010] As a further optimization scheme of the utility model, the air pressure balance pipe is a circular pipe structure, the outer diameter of the air pressure balance pipe is greater than the inner diameter of the rubber pipe, and an anti-skid groove is formed in the outer surface of the bottom end of the air pressure balance pipe.

[0011] As a further optimization scheme of the utility model, the second connecting structure comprises an upper joint fixedly connected with the air pressure balance pipe at the bottom end, the upper joint is threadedly connected with the internal thread joint at the bottom end, a top cover is integrally formed at the top of the upper joint, and an air pressure balance hole is vertically formed in the center of the top of the top cover and communicated with the top end of the air pressure balance pipe.

[0012] As a further optimization scheme of the utility model, a first sealing gasket is slidably sleeved on the connecting end of the external thread joint and the connecting seat, and a second sealing gasket is slidably sleeved on the connecting position of the upper joint and the internal thread joint.

[0013] The utility model has the advantages of:

[0014] 1. When the oil in the oil tank is extracted, resulting in negative pressure in the oil tank, the position of the rubber pipe with the crack is affected by the negative pressure and is opened, at this time, the air in the external environment can enter the air pressure balance pipe through the air pressure balance hole, and finally enter the oil tank through the opened crack, balance the air pressure in the oil tank, and avoid the problem that the air pressure in the oil tank gradually decreases with the decrease of the oil in the oil tank, so that the oil in the oil tank is difficult to be extracted and used.

[0015] 2. Without affecting the balance of the air pressure in the oil tank, when the oil tank is tilted due to external force, the oil in the oil tank will flow to the position of the rubber pipe with the crack, at this time, the crack is tightly attached to the side wall on both sides under the extrusion of the oil, so that the oil cannot pass through the crack and enter the rubber pipe, thereby achieving the purpose of preventing the oil from being discharged through the air pressure balance hole when the oil tank is tilted, and preventing the oil from leaking. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the overall structure of the utility model;

[0017] Figure 2 is the cross-sectional structure of the utility model Figure 1 ;

[0018] Figure 3 is the position of the crack in the rubber pipe of the utility model;

[0019] Figure 4 is the connection structure of the top cover, the upper joint and the air pressure balance pipe of the utility model;

[0020] Figure 5The utility model discloses a connection diagram of the screwing plate and the external thread joint and the internal thread joint.

[0021] In the drawing: 1, connecting seat; 2, screwing plate; 3, external thread joint; 4, internal thread joint; 5, through hole; 6, first sealing washer; 7, top cover; 8, upper joint; 9, air pressure balance pipe; 10, air pressure balance hole; 11, second sealing washer; 12, rubber pipe; 13, sealing part; 14, crack. DETAILED DESCRIPTION

[0022] The following detailed description of the application in conjunction with the drawings, it is necessary to point out here that the following detailed description is only used to further illustrate the application, can not be understood as limiting the scope of the application, the skilled person can make some non-essential improvements and adjustments to the application according to the above application.

[0023] EMBODIMENT

[0024] As Figure 1 - Figure 5 The utility model discloses a convenient to use's oil tank safety valve, including the bottom fixedly through the connecting seat 1 of oil tank top wall, connecting seat 1 is round tubular structure, is seted up with internal thread on the inner wall of connecting seat 1, is provided with first connecting structure above connecting seat 1, and first connecting structure includes the external thread joint 3 of setting up above connecting seat 1, and the bottom of external thread joint 3 is fixed through internal thread and is screwed with connecting seat 1,

[0025] The top of external thread joint 3 is integrally formed with internal thread joint 4, and the adjacent end between external thread joint 3 and internal thread joint 4 is fixedly connected with screwing plate 2, and screwing plate 2 is regular hexagon structure, and the side length of screwing plate 2 is set according to standard nut size, and after use, the wrench of size adaptation with screwing plate 2 can be clamped on screwing plate 2, and the wrench is twisted to drive external thread joint 3 to rotate, which is convenient for connecting external thread joint 3 and connecting seat 1,

[0026] The top of external thread joint 3 is integrally formed with internal thread joint 4, and the adjacent end between external thread joint 3 and internal thread joint 4 is fixedly connected with screwing plate 2, and screwing plate 2 is regular hexagon structure, and the side length of screwing plate 2 is set according to standard nut size, and after use, the wrench of size adaptation with screwing plate 2 can be clamped on screwing plate 2, and the wrench is twisted to drive external thread joint 3 to rotate, which is convenient for connecting external thread joint 3 and connecting seat 1,

[0027] The bottom end of the air pressure balance pipe 9 is sleeved with a rubber pipe 12, the outer diameter of the air pressure balance pipe 9 is larger than the inner diameter of the rubber pipe 12, and the outer surface of the bottom end of the air pressure balance pipe 9 is provided with an anti-skid groove. Since the rubber pipe 12 is made of flexible rubber material, the inner diameter can be stretched to increase, so that the top open end of the rubber pipe 12 can be sleeved on the bottom of the air pressure balance pipe 9. In addition, the anti-skid groove provided at the bottom of the air pressure balance pipe 9 can increase the friction force at the connection between the rubber pipe 12 and the air pressure balance pipe 9, so as to avoid the rubber pipe 12 from easily slipping off the bottom of the air pressure balance pipe 9 under stress.

[0028] The rubber pipe 12 is integrally formed with a sealing part 13 at one end away from the air pressure balance pipe 9, so that air cannot directly enter the oil tank from the bottom end of the rubber pipe 12. The rubber pipe 12 is symmetrically split into two cracks 14 at one end close to the sealing part 13 by using an art knife, and the bottom end of the rubber pipe 12 extends into the oil tank through the connecting seat 1. When the oil in the oil tank is pumped out, causing negative pressure in the oil tank, the position of the rubber pipe 12 split with the cracks 14 will be affected by the negative pressure and will be opened. At this time, the air in the external environment can enter the air pressure balance pipe 9 through the air pressure balance hole 10, and finally enter the oil tank through the opened cracks 14, balance the air pressure in the oil tank, and avoid the problem that the air pressure in the oil tank gradually decreases as the oil in the oil tank decreases, causing difficulty in pumping out the oil in the oil tank for use.

[0029] The connecting end of the outer threaded joint 3 and the connecting seat 1 is sleeved with a first sealing washer 6, and the connecting end of the upper joint 8 and the inner threaded joint 4 is sleeved with a second sealing washer 11. The first sealing washer 6 and the second sealing washer 6 respectively seal the connecting end of the outer threaded joint 3 and the connecting seat 1 and the connecting end of the upper joint 8 and the inner threaded joint 4, greatly improving the sealing performance and avoiding oil leakage when the oil tank is poured.

[0030] Need to explain, this one convenient to use oil tank safety valve, use, first through the screw plate 2 will the outer thread joint 3 screw fixed on the connecting seat 1, then the rubber tube 12 top end set fixed on the gas pressure balance pipe 9, at this time the rubber tube 12 bottom end penetrates the connecting seat 1 and utilizes the upper joint 8 and the inner thread joint 4 screw connection realizes to the rubber tube 12 is fixed, because the top cover 7 and the upper joint 8 are set up due to the gas pressure balance pipe 9 communication gas pressure balance hole, when the oil liquid in the oil tank is extracted, causes the oil tank to form negative pressure, the rubber tube 12 cuts the crack 14 position affected by the negative pressure will open, at this time the air in the external environment can enter the gas pressure balance pipe 9 along the gas pressure balance hole 10, finally through the open crack 14 enters the oil tank, balances the gas pressure in the oil tank, avoids as far as possible with the oil liquid reduction in the oil tank, the gas pressure in the oil tank gradually reduces, causes difficult to extract the oil liquid in the oil tank to use the problem, when the oil tank is tilted due to external force, the oil liquid in the oil tank will flow to the rubber tube 12 open crack 14 position, at this time the rubber tube 12 is extruded by the oil liquid and makes the crack 14 both sides wall tightly fit, makes the oil liquid unable to pass through the crack 14 leak, thereby reaches when the oil tank is tilted to prevent the oil liquid from discharging through the gas pressure balance hole 10, causes the oil liquid leakage purpose.

[0031] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of variations and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A convenient oil tank safety valve, comprising a connecting seat (1) fixedly mounted at its bottom end on the top wall of the oil tank, wherein a first connecting structure is provided above the connecting seat (1), characterized in that: A second connection structure is provided above the first connection structure. A pressure balance pipe (9) is fixedly connected to the bottom of the second connection structure. A rubber tube (12) is sleeved at the bottom end of the pressure balance pipe (9). A sealing part (13) is integrally formed at the end of the rubber tube (12) away from the pressure balance pipe (9). Two slits (14) are symmetrically cut at the end of the rubber tube (12) near the sealing part (13) with a utility knife. The bottom end of the rubber tube (12) extends through the connection seat (1) into the oil tank.

2. The convenient oil tank safety valve according to claim 1, characterized in that: The inner wall of the connecting seat (1) is provided with an internal thread. The first connecting structure includes an external threaded connector (3) disposed above the connecting seat (1). The bottom end of the external threaded connector (3) is screwed to the connecting seat (1) through an internal thread. The top of the external threaded connector (3) is integrally formed with an internal threaded connector (4).

3. The convenient oil tank safety valve according to claim 2, characterized in that: A tightening plate (2) is fixedly connected between the adjacent ends of the external threaded connector (3) and the internal threaded connector (4). The tightening plate (2) has a regular hexagonal shape and the side length of the tightening plate (2) is set according to the standard nut size.

4. The convenient oil tank safety valve according to claim 3, characterized in that: The center of the tightening plate (2) has a through hole (5) corresponding to the inner cavity of the external threaded joint (3) and the internal threaded joint (4), and the inner diameter of the through hole (5) is larger than the outer diameter of the rubber tube (12).

5. The convenient oil tank safety valve according to claim 1, characterized in that: The air pressure balance tube (9) has a circular tube structure. The outer diameter of the air pressure balance tube (9) is larger than the inner diameter of the rubber tube (12), and an anti-slip groove is provided on the outer surface of the bottom end of the air pressure balance tube (9).

6. A convenient oil tank safety valve according to claim 2, characterized in that: The second connection structure includes an upper connector (8) whose bottom end is fixedly connected to the air pressure balance pipe (9). The bottom end of the upper connector (8) is threadedly connected to the internal thread connector (4). The top of the upper connector (8) is integrally formed with a top cover (7). The top center of the top cover (7) is vertically provided with an air pressure balance hole (10) that communicates with the top end of the air pressure balance pipe (9).

7. A convenient oil tank safety valve according to claim 6, characterized in that: The external threaded connector (3) is slidably fitted with a first sealing gasket (6) at the connection end with the connecting seat (1), and the upper connector (8) is slidably fitted with a second sealing gasket (11) at the connection point with the internal threaded connector (4).

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