Oil drainage screw plug and oil drainage method

Abstract

The oil drainage screw plug comprises an installation screw plug arranged at the bottom of an oil tank, the interior and the two ends of the installation screw plug are arranged in a through mode, the end, close to the interior of the oil tank, of the installation screw plug is an oil drainage port, the end, away from the interior of the oil tank, of the installation screw plug is an oil outlet port, and the oil drainage port is provided with an oil drainage mechanism. The oil outlet port is provided with a sealing piece, and the oil drainage mechanism is matched with the sealing piece to be used for draining or intercepting oil in the oil tank. The structure is high in sealing performance, high in environmental protection performance and convenient and fast to mount and dismount.

Description

Technical Field

[0001] The invention relates to the field of oil tank oil draining, in particular to an oil drain screw plug and an oil draining method. Background Art

[0002] The oil drain plug is an important component of the fuel tank and oil pan. There are many types of oil drain plugs on the market. They are generally assembled on the bottom of the fuel tank through threads, and the contact surface is sealed with a sealing gasket.

[0003] The drain plug is installed at the bottom of the oil tank. When the seal of the drain plug is damaged, the oil tank is at risk of leakage, causing environmental damage and pollution. When the drain plug is unscrewed, the oil flows out quickly, and it is difficult to avoid the released oil splashing onto the hands or other places. If the oil temperature is high, there is also a risk of scalding. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an oil drain plug and an oil drain method.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides an oil drain plug, comprising an installation plug arranged at the bottom of an oil tank, wherein the interior and both ends of the installation plug are through-type, an end of the installation plug close to the interior of the oil tank is an oil drain port, and an end of the installation plug away from the interior of the oil tank is an oil outlet port, an oil drain port is provided with an oil drain mechanism, and an oil outlet port is provided with a seal, and the oil drain mechanism cooperates with the seal to drain or intercept the oil in the oil tank.

[0007] Preferably, the oil drain mechanism includes a sealing cover, a blocking ball and a spring. The sealing cover is sealingly connected to the oil drain port. The interior of the sealing cover is communicated with the oil drain port. An oil drain hole is provided on the side wall of the sealing cover. The blocking ball is arranged inside the sealing cover. The diameter of the blocking ball is larger than the inner diameter of the oil drain port. The blocking ball sealingly abuts against the oil drain port. One end of the spring is connected to the side of the blocking ball away from the oil drain port, and the other end is connected to the top of the sealing cover.

[0008] Preferably, an inclined surface is provided at the oil drain port, and the port area of ​​the oil drain port close to one end of the oil tank is larger than the inner circumferential area of ​​the mounting screw plug.

[0009] Preferably, the sealing member is configured as an oil drain plug, one end of which is sealingly connected to the oil outlet port, and the other end of which is tightly pressed against the outer peripheral side of the oil outlet port.

[0010] Preferably, the sealing cover is composed of a steel ball cover and a spring cover, the steel ball cover is tightly sleeved on the oil drain port, the plugging ball is placed in the steel ball cover, and the inner diameter of the spring cover is smaller than the diameter of the plugging ball.

[0011] Preferably, an annular clamping block is arranged on the outer edge of the oil drain port, and an annular buckle is arranged on the bottom end of the steel ball cover, and the annular buckle is clamped on the annular clamping block.

[0012] Preferably, a first sealing gasket is provided between the contact surface between the mounting screw plug and the outside of the oil tank.

[0013] Preferably, a second sealing gasket is provided between the contact surface between the oil drain plug and the outside of the mounting screw plug.

[0014] Another aspect of the present invention further provides an oil draining method of an oil drain plug, comprising the following steps:

[0015] S1: The staff removes the oil drain plug from the installation screw plug;

[0016] S2: The staff uses the oil draining tool to push the plugging ball upwards;

[0017] S3: The area of ​​the oil drain port gradually increases, and the oil in the oil tank flows out from the oil drain port, realizing oil draining of the oil tank;

[0018] S4: The staff takes out the oil drain tool, and the plugging ball seals and blocks the oil drain port again under the action of its own gravity and the elastic force of the spring;

[0019] S5: The staff installs the oil drain plug to complete the oil draining process.

[0020] Preferably, the oil draining tool is configured as a "U"-shaped rod.

[0021] The beneficial effects of the present invention are:

[0022] 1. Through the cooperation of the plugging ball, spring, drain plug and mounting screw, the plugging ball and spring seal and block the drain port, and the drain plug seals and blocks the oil outlet port, so that the mounting screw is doubly sealed, thereby improving the sealing effect of the oil drain of the oil tank. When draining the oil, remove the drain plug at the oil outlet port, and the oil in the oil tank will not flow out directly from the oil tank, thereby avoiding oil splashing at the moment of removing the drain plug, thereby avoiding direct oil spraying to cause external environmental pollution. Since the oil temperature in some oil tanks is too high, it also avoids burns to the staff. The structure has strong sealing performance, high environmental protection performance, and is easy to install and disassemble.

[0023] 2. The plugging ball, spring and drain plug are integrated on the mounting screw plug, which is easy to install, saves installation space and has a wide range of applications.

[0024] 3. The staff uses a "U"-shaped rod oil drain tool to push the plugging ball upward. On the one hand, the staff stays away from the oil drain port to avoid oil splashing on themselves, which protects the staff and is easy to operate. On the other hand, in the process of pushing the plugging ball upward, the cross-sectional area of ​​the oil drain port gradually increases, which can be used to control the oil flow rate in the oil tank, so that the oil flow rate increases from a small amount to a large amount, forming a buffered lead-out process to avoid oil splashing everywhere during the oil draining process. The oil draining process is simple to operate and highly safe.

[0025] 4. The steel ball cover and spring cover can limit the spring to prevent the spring from being skewed and excessively deformed during the expansion and contraction process, and also prevent the blocking ball from excessively squeezing the spring. This structure is highly practical and extends its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the operating principle of the present invention;

[0028] In the figure: 1-spring cover; 2-spring; 3-steel ball cover; 4-blocking ball; 5-oil tank; 6-installation screw plug; 7-oil drain plug; 8-first sealing gasket; 9-second sealing gasket; 10-oil drain hole; 11-inclined surface; 12-annular clamp block; 13-annular buckle. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In this embodiment, refer to Figure 1 , including a mounting screw plug 6 arranged at the bottom of the oil tank 5, a threaded hole is assembled at the bottom of the oil tank 5, the mounting screw plug 6 is tightly connected to the threaded hole by threaded connection, and a first sealing gasket 8 is arranged between the nut part of the mounting screw plug 6 and the contact surface outside the oil tank 5. The first sealing gasket 8 is set to a rubber material, which helps to strengthen the sealing of the connection between the threaded hole and the mounting screw plug 6.

[0032] Both ends of the mounting screw plug 6 as well as the interior are through-connected, the end of the mounting screw plug 6 close to the interior of the oil tank 5 is an oil drain port, and the end of the mounting screw plug 6 away from the interior of the oil tank 5 is an oil outlet port, so that the interior of the mounting screw plug 6 constitutes an oil drain passage, the oil drain port is provided with an oil drain mechanism, and the oil outlet port is provided with a seal, and the oil drain mechanism cooperates with the seal to drain or intercept the oil in the oil tank 5 in the oil drain passage.

[0033] In this embodiment, refer to Figure 1 The oil drain mechanism includes a sealing cover, a plugging ball 4 and a spring 2. The sealing cover is composed of a steel ball cover 3 and a spring cover 1. The steel ball cover 3 and the spring cover 1 are connected in an integral manner. The inner circle area of ​​the spring cover 1 is smaller than the inner circle area of ​​the steel ball cover 3. In order to facilitate the sealing installation of the sealing cover on the mounting screw plug 6, an annular clamping block 12 is integrally connected to the outer edge of the oil drain port, and an annular buckle 13 is integrally connected to the bottom end of the steel ball cover 3. The annular buckle 13 is clamped on the annular clamping block 12 to seal the sealing cover to the oil drain port. The interior of the sealing cover is connected to the oil drain port. An oil drain hole 10 is opened on the steel ball cover 3. The oil drain hole 10 introduces the oil in the oil tank 5 into the oil drain passage;

[0034] The plugging ball 4 is placed in the steel ball cover 3, and the inner diameter of the spring cover 1 is smaller than the diameter of the plugging ball 4, so that the plugging ball 4 will not enter the spring cover 1 completely. An inclined surface 11 is provided at the oil drain port. The port area of ​​the oil drain port close to the end of the oil tank 5 is larger than the inner circumferential area of ​​the mounting screw plug 6. The diameter of the plugging ball 4 is larger than the inner diameter of the oil drain port. The plugging ball 4 is set as a steel ball, which has a certain weight, so that the plugging ball 4 is sealed against the inclined surface 11 of the oil drain port, and the connection between the plugging ball 4 and the oil drain port is more tightly fitted.

[0035] One end of the spring 2 is fixedly connected to the side of the blocking ball 4 away from the oil drain port, and the other end is connected to the top of the spring cover 1. At the same time, the spring 2 and the spring cover 1 are clearance-matched. When the blocking ball 4 is pushed upward, the blocking ball 4 will not completely enter the spring cover 1, avoiding excessive squeezing of the spring 2 during operation by the staff. It has a certain protective effect on the spring 2 and extends the service life of the structure.

[0036] In this embodiment, refer to Figure 1 The sealing member is set as an oil drain plug 7, which is composed of a screw and a nut. A thread is set inside the mounting screw plug 6 near the oil outlet port, so that the screw is assembled in the mounting screw plug 6, and the nut abuts against the outer peripheral side of the oil outlet port. A conical groove is set at one end of the nut, which is convenient for using a tool to rotate the oil drain plug 7, thereby facilitating the installation and removal of the oil drain plug 7;

[0037] A second sealing gasket 9 is provided between the contact surface between the oil drain plug 7 and the outside of the mounting screw plug 6. The second sealing gasket 9 is made of rubber material, which helps to enhance the sealing performance of the connection between the oil drain plug 7 and the oil outlet port.

[0038] Through the cooperation of the oil drain plug 7, the mounting screw plug 6, the spring 2 and the blocking ball 4, the oil drain channel at the bottom of the oil tank 5 can be doubly sealed, and the structure can be specifically double-switched. First, the oil drain plug 7 is rotated and removed from the mounting screw plug 6. At this time, the oil in the oil tank 5 is blocked by the blocking ball 4 to avoid oil splashing. Then the blocking ball 4 is pushed upward to open the oil drain port and the oil tank 5 is drained.

[0039] This structure can be used for the discharge of various liquids, such as high-temperature liquids, contaminated liquids and corrosive liquids, and is also suitable for various environments, such as various oil tanks, etc., and has a wide range of applications.

[0040] The working principle of this embodiment is as follows: when it is necessary to drain the oil from the oil tank 5, the oil drain plug 7 is rotated to remove the oil drain plug 7 from the inside of the mounting screw plug 6, an upward force is applied to the plugging ball 4, and the plugging ball 4 is pushed upward so that the plugging ball 4 gradually separates from the oil drain port. The cross-sectional area of ​​the oil drain port gradually increases, and the oil in the oil tank 5 enters the oil drain passage through the oil drain hole 10 and is then drawn out from the oil outlet port to realize the oil draining in the oil tank 5. The thrust on the plugging ball 4 is canceled, and the plugging ball 4 is pushed to reset by its own force and the force of the spring 2. The plugging ball 4 conflicts with the inclined surface 11 of the oil drain port, the oil drain passage is cut off, and the oil draining is completed. The oil drain plug 7 is then rotated to be sealed and connected to the oil outlet port to realize the sealed connection at the bottom of the oil tank 5, which is easy to operate and has strong sealing performance.

[0041] The preferred embodiment of the present invention also provides an oil draining method of an oil delivery screw plug, comprising the following steps:

[0042] S1: The staff rotates the oil drain plug 7 to remove the oil drain plug 7 from the mounting screw plug 6.

[0043] S2: Reference Figure 2 The staff uses a "U"-shaped rod oil drain tool to reach into the mounting screw plug 6, lifts the oil drain tool upward, pushes the plugging ball 4 upward, and the spring 2 is compressed.

[0044] S3: The area of ​​the oil drain port gradually increases, and the oil in the oil tank 5 flows out from the oil drain port, thereby draining the oil from the oil tank 5. During the oil draining process, the staff stay away from the oil outlet port to avoid the oil from splashing on the staff and scalding the staff, thereby ensuring personal safety. The oil draining is completed.

[0045] S4: The staff takes out the oil drain tool, and the plugging ball 4 seals and blocks the oil drain port again under the action of its own gravity and the elastic force of the spring 2.

[0046] S5: Screw the oil drain plug 7 into the mounting screw plug 6 to complete the oil drain process.

[0047] The above are only preferred embodiments of the invention, and are not intended to limit the patent scope of the invention. All equivalent structural changes made using the contents of the specification and drawings of the invention under the concept of the invention, or direct / indirect applications in other related technical fields are included in the patent protection scope of the invention.

Claims

1. An oil drain plug, characterized in that: The invention comprises a mounting screw plug (6) arranged at the bottom of an oil tank (5), the interior and both ends of the mounting screw plug (6) being through-arranged, the end of the mounting screw plug (6) close to the interior of the oil tank (5) being an oil drain port, the end of the mounting screw plug (6) away from the interior of the oil tank (5) being an oil outlet port, the oil drain port being provided with an oil drain mechanism, the oil outlet port being provided with a sealing member, the oil drain mechanism being used in conjunction with the sealing member to drain or intercept the oil in the oil tank (5).

2. An oil drain plug according to claim 1, characterized in that: The oil drain mechanism comprises a sealing cover, a plugging ball (4) and a spring (2); the sealing cover is sealingly connected to the oil drain port, the interior of the sealing cover is communicated with the oil drain port, an oil drain hole (10) is provided on the side wall of the sealing cover, the plugging ball (4) is arranged inside the sealing cover, the diameter of the plugging ball (4) is larger than the inner diameter of the oil drain port, the plugging ball (4) is sealingly abutted against the oil drain port, one end of the spring (2) is connected to a side of the plugging ball (4) away from the oil drain port, and the other end is connected to the top of the sealing cover.

3. An oil drain plug according to claim 1, characterized in that: An inclined surface (11) is provided at the oil drain port, and the port area of ​​the oil drain port close to one end of the oil tank (5) is larger than the inner circumference area of ​​the mounting screw plug (6).

4. An oil drain plug according to claim 1, characterized in that: The sealing member is configured as an oil drain plug (7), one end of the oil drain plug (7) is sealingly connected to the oil outlet port, and the other end is tightly pressed against the outer peripheral side of the oil outlet port.

5. An oil drain plug according to claim 2, characterized in that: The sealing cover is composed of a steel ball cover (3) and a spring cover (1); the steel ball cover (3) is tightly sleeved on the oil drain port; the plugging ball (4) is placed in the steel ball cover (3); and the inner diameter of the spring cover (1) is smaller than the diameter of the plugging ball (4).

6. An oil drain plug according to claim 5, characterized in that: An annular clamping block (12) is arranged on the outer edge of the oil drain port, and an annular clamping buckle (13) is arranged on the bottom end of the steel ball cover (3), and the annular clamping buckle (13) is clamped on the annular clamping block (12).

7. An oil drain plug according to claim 1, characterized in that: A first sealing gasket (8) is provided between the contact surface between the mounting screw plug (6) and the outside of the oil tank (5).

8. An oil drain plug according to claim 4, characterized in that: A second sealing gasket (9) is provided between the contact surface between the oil drain plug (7) and the outside of the mounting screw plug (6).

9. An oil draining method using the oil drain plug according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: S1: The staff removes the oil drain plug (7) from the mounting screw plug (6); S2: The staff uses the oil draining tool to push the plugging ball (4) upwards; S3: the area of ​​the oil drain port gradually increases, and the oil in the oil tank (5) flows out from the oil drain port, thereby draining the oil from the oil tank (5); S4: The staff takes out the oil drain tool, and the plugging ball (4) seals and blocks the oil drain port again under the action of its own gravity and the elastic force of the spring (2); S5: The staff installs the oil drain plug (7) to complete the oil drain process.

10. An oil drain plug according to claim 9, characterized in that: The oil drain tool is set as a "U" type rod.

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