Theft-proof oil drain valve and its application in oil delivery

Abstract

The present application relates to the technical field of oil drain valve, in particular to a kind of oil theft prevention type oil drain valve and its application in oil product delivery, comprising: lower valve body, and the upper valve body and delivery pipe fixed on the upper and lower ends of the lower valve body, the inner wall of the delivery pipe is fixed with fixed plate;Sliding rod, slidingly installed on the fixed plate, the end of the sliding rod is fixed with sealing disc;Pressure boost pushing mechanism, set on the fixed plate, the pressure boost pushing mechanism is connected with rotating sleeve, the fixed plate is also provided with trigger rotating mechanism, the pressure boost pushing mechanism can be driven rotating sleeve rotation by the trigger rotating mechanism when the pressure in the delivery pipe increases;Rotary ring, rotationally installed in the upper valve body and connected with the pressure boost pushing mechanism, the rotary ring is provided with multiple stages locking mechanism, the locking of sealing disc position by multiple stages locking mechanism can be controlled by the change of pressure in delivery pipe, to play the effect of preventing oil theft to oil drain valve.

Description

Technical Field

[0001] This invention relates to the field of oil drain valve technology, specifically an anti-theft oil drain valve and its application in oil transportation. Background Technology

[0002] The unloading valve, also known as the API valve, is installed in the toolbox at the bottom of the tanker truck. It is usually connected to the bottom valve through a pipe and used in conjunction with the valve. The inlet is fastened to the pipe flange with 8-M10 bolts. It is mainly used for transporting gasoline and diesel.

[0003] The anti-theft oil drain valve combines oil draining and anti-theft functions. It is mainly used to prevent oil from being illegally stolen, and at the same time, it can safely discharge oil when necessary. Therefore, the anti-theft oil drain valve is a device that integrates safety, reliability and convenience.

[0004] Existing anti-theft oil drain valves typically achieve their anti-theft effect through physical structural anti-theft design. During the oil draining process, a special tool is required to open the drain valve. However, this method only provides a single external anti-theft effect. Whether in transportation or during oil draining, the unlocking tool is always in an effective unlocking state. If oil thieves can open the drain valve by preparing a counterfeit tool, the anti-theft effect will fail. Summary of the Invention

[0005] The purpose of this invention is to provide an anti-theft oil drain valve and its application in oil transportation, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An anti-theft oil drain valve includes:

[0008] The lower valve body, and the upper valve body and the conveying pipe fixed at the upper and lower ends of the lower valve body, wherein a fixing plate is fixed to the inner wall of the conveying pipe;

[0009] Also includes:

[0010] A sliding rod is slidably mounted on the fixed plate, and a sealing disc is fixed to the end of the sliding rod;

[0011] A pressure boosting mechanism is mounted on the fixed plate. A rotating sleeve is connected to the pressure boosting mechanism. A triggering rotation mechanism is also mounted on the fixed plate. When the pressure inside the delivery pipe increases, the pressure boosting mechanism can drive the rotating sleeve to rotate through the triggering rotation mechanism and adjust the conduction state of the delivery pipe.

[0012] A rotating ring is rotatably mounted in the upper valve body and connected to the pressurizing and pushing mechanism. The rotating ring is provided with a multi-stage locking mechanism. The multi-stage locking mechanism can control the sliding rod to slide axially when the rotating ring rotates, so as to adjust the conduction state of the upper valve body through the sealing disc.

[0013] As a further aspect of the present invention: the pressurizing and pushing mechanism includes a guide disk and a pushing disk that slide along the axial direction of the rotating sleeve, wherein the guide disk and the pushing disk are respectively formed with a first through hole and a second through hole that communicate and cooperate with each other;

[0014] It also includes a guide assembly disposed on the guide disk and the push disk for limiting the rotation of the guide disk and controlling the rotation of the push disk.

[0015] As a further embodiment of the present invention: the guiding assembly includes a first follower rod and a second follower rod fixed on both sides of the push disk, the second follower rod passing through the rotating ring, a connecting plate slidably connected to the first follower rod fixed on the rotating sleeve, and a guide post passing through the fixed plate fixed on the guide disk.

[0016] As a further embodiment of the present invention: the triggering rotation mechanism includes a guide groove and a spiral groove formed on the outer circumference of the rotating sleeve, a first limiting block that slides and engages with the guide groove is fixed on the inner wall of the guide plate, a movable ring that slides along the axial direction of the guide column is slidably mounted on the rotating sleeve, and a second limiting block that slides and engages with the spiral groove is fixed on the inner wall of the movable ring.

[0017] As a further embodiment of the present invention: the triggering rotation mechanism further includes a first spring and a second spring sleeved on the rotating sleeve, the two ends of the first spring abutting against the guide plate and the movable ring respectively, and the two ends of the second spring abutting against the movable ring and the fixed plate respectively.

[0018] As a further embodiment of the present invention: the guide groove includes a first vertical groove, a first annular groove, a second vertical groove, and a second annular groove formed on the outer circumference of the rotating sleeve, wherein the first vertical groove, the first annular groove, the second vertical groove, and the second annular groove are connected to each other in sequence.

[0019] As a further embodiment of the present invention: the multi-stage locking mechanism includes a limiting wheel fixed on the sliding rod, a handle is rotatably mounted on the outer wall of the upper valve body, a cam is fixed on the handle to abut against the limiting wheel, and a limiting component is provided on the rotating ring.

[0020] As a further embodiment of the present invention: the limiting component includes a limiting ring fixed on the rotating ring, and a limiting groove and an arc-shaped inclined groove are formed in the limiting ring.

[0021] As a further embodiment of the present invention: the limiting component further includes a fixing ring fixed on the sliding rod and in contact with the limiting ring, the fixing ring being in slidable contact with the limiting groove and the arc-shaped inclined groove, and a third spring being sleeved on the sliding rod, the two ends of the third spring being in contact with the fixing ring and the sealing disc respectively.

[0022] An application of an anti-theft oil drain valve in oil transportation, comprising the aforementioned anti-theft oil drain valve.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: The present application can provide the oil drain valve with a multi-level anti-theft effect through a multi-level locking mechanism, so as to effectively prevent the oil from being stolen. Specifically, the multi-level locking mechanism can limit the displacement of the sliding rod to ensure that the position of the sealing disc does not change, so that the upper valve body is always in a blocked state. When oil needs to be drained, the pressure change in the delivery pipe can control the movement of the boosting push mechanism and the movement of the trigger rotation mechanism. When the pressure in the delivery pipe reaches the set value, the rotating sleeve is rotated under the action of the trigger rotation mechanism, so as to control the delivery pipe to be connected to the lower valve body through the boosting push mechanism. At the same time, the boosting push mechanism will perform an unlocking action on the multi-level locking mechanism through the rotating ring. Under the action of the multi-level locking mechanism, the sealing disc is separated from the upper valve body, thereby realizing the oil draining action.

[0024] The pre-compression force provided by the first and second springs effectively prevents displacement caused by oil pressure fluctuations, ensuring the anti-theft effect of the drain valve. Simultaneously, when the drain valve is in the draining state, the elastic potential energy change of the first and second springs allows the rotating sleeve to quickly rotate to a specified angle when the oil pressure in the delivery pipe reaches a set value. This, in turn, controls the second and first guide holes to connect via the push plate. This not only automatically controls the connection between the delivery pipe and the lower valve body during the draining state but also unlocks the multi-stage locking mechanism, facilitating subsequent normal draining operations.

[0025] By cooperating with the guide groove and the first limiting block, and the spiral groove and the second limiting block, the oil will only be discharged when the oil pressure reaches the set value. After the oil discharge is completed, the delivery pipe will only be blocked when the oil pressure returns to the pressure before the discharge. This ensures that the oil is discharged quickly and smoothly, and that the oil is discharged completely. It also prevents the delivery pipe from being blocked due to high oil pressure, which could cause excessive pressure on the inner wall of the delivery pipe, leading to damage or reduced lifespan of the delivery pipe.

[0026] The multi-stage locking mechanism ensures that the sealing disc cannot be controlled regardless of the handle's movement before oil discharge, thus preventing oil theft from the drain valve. After oil discharge is complete, the handle can control the fixed ring to reset, and the multi-stage locking mechanism then locks the fixed ring's position again. In summary, the dual locking of the multi-stage locking mechanism provides a multi-stage anti-theft effect for the drain valve. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of one embodiment of an anti-theft oil drain valve.

[0028] Figure 2 This is a schematic diagram of the internal structure of the upper valve body in one embodiment of an anti-theft oil drain valve.

[0029] Figure 3 This is a schematic diagram of the internal structure of the delivery pipe in one embodiment of an anti-theft oil drain valve.

[0030] Figure 4 This is a half-sectional schematic diagram of the upper valve body, lower valve body, and delivery pipe in one embodiment of an anti-theft oil drain valve.

[0031] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0032] Figure 6 This is a schematic diagram of the internal structure of the upper valve body, lower valve body, and delivery pipe in one embodiment of an anti-theft oil drain valve.

[0033] Figure 7 This is a schematic diagram showing the connection relationship between the pressure boosting mechanism and the trigger rotation mechanism in one embodiment of an anti-theft oil drain valve.

[0034] Figure 8 This is an exploded structural diagram of the pressurization and rotation mechanisms in one embodiment of an anti-theft oil drain valve.

[0035] Figure 9 This is a schematic diagram of the structure of a multi-stage locking mechanism, sliding rod, and sealing disc in one embodiment of an anti-theft oil drain valve.

[0036] Figure 10 This is an exploded structural diagram of a portion of the multi-stage locking mechanism in one embodiment of an anti-theft oil drain valve.

[0037] Figure 11 This is a schematic diagram of the rotating ring and the limiting ring in one embodiment of an anti-theft oil drain valve.

[0038] Figure 12 This is a schematic cross-sectional view of the rotating ring and the limiting ring in one embodiment of an anti-theft oil drain valve.

[0039] In the diagram: 1. Lower valve body; 2. Upper valve body; 3. Delivery pipe; 4. Fixing plate; 401. Guide block; 5. Sliding rod; 501. Slot; 6. Sealing disc; 7. Limiting wheel; 8. Handle; 9. Cam; 10. Rotating sleeve; 1001. First vertical groove; 1002. First annular groove; 1003. Second vertical groove; 1004. Second annular groove; 1005. Spiral groove; 11. Guide disc; 1101. First 12. Limiting block; 13. First through hole; 14. Movable ring; 15. Second limiting block; 16. Guide post; 17. First spring; 18. Second spring; 19. Pushing disc; 20. Second through hole; 21. First follower rod; 22. Connecting plate; 23. Rotating ring; 24. Limiting ring; 25. Limiting groove; 26. Arc groove; 27. Fixed ring; 28. Third spring; 29. ​​Second follower rod. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0042] Please see Figures 1-12 In this embodiment of the invention, an anti-theft oil drain valve includes:

[0043] The lower valve body 1, and the upper valve body 2 and the conveying pipe 3 are fixed at the upper and lower ends of the lower valve body 1, and the inner wall of the conveying pipe 3 is fixed with a fixing plate 4.

[0044] Also includes:

[0045] The sliding rod 5 is slidably mounted on the fixed plate 4, and a sealing disc 6 is fixed to the end of the sliding rod 5;

[0046] A pressure boosting mechanism is provided on the fixed plate 4. A rotating sleeve 10 is connected to the pressure boosting mechanism. A triggering rotation mechanism is also provided on the fixed plate 4. When the pressure in the conveying pipe 3 increases, the pressure boosting mechanism can drive the rotating sleeve 10 to rotate through the triggering rotation mechanism and adjust the conduction state of the conveying pipe 3.

[0047] A rotating ring 21 is rotatably mounted inside the upper valve body 2 and connected to the pressurizing and pushing mechanism. The rotating ring 21 is provided with a multi-stage locking mechanism. The multi-stage locking mechanism can control the sliding rod 5 to slide axially when the rotating ring 21 rotates, so as to adjust the conduction state of the upper valve body 2 through the sealing disc 6.

[0048] Specifically, a guide block 401 is fixed on the fixed plate 4 and arranged parallel to the sliding rod 5. A slot 501 is opened on the outer wall of the sliding rod 5 to slide and fit with the guide block 401, which can ensure that the sliding rod 5 will not rotate during movement. When oil is not being discharged, the multi-stage locking mechanism can provide multiple locking forces to the sliding rod 5, so as to perform a sealing action on the valve body 2 through the sealing disc 6, thereby achieving the effect of preventing theft of the oil discharge valve. When oil discharge is required, oil can be introduced into the delivery pipe 3, so that the pressure in the delivery pipe 3 increases. Under the action of the pressure pushing force, The pressurization mechanism is controlled to move, thereby driving the trigger rotation mechanism. When the pressure in the delivery pipe 3 reaches the set value, the trigger rotation mechanism will control the rotating sleeve 10 to rotate, so that the delivery pipe 3 can be connected to the lower valve body 1 through the pressurization mechanism. At the same time, the trigger rotation mechanism will also drive the rotating ring 21 to rotate, so that the multi-stage locking mechanism is no longer locked. At this time, the multi-stage locking mechanism can be controlled to move, and the sealing disc 6 can be controlled to move towards the lower valve body 1 through the sliding rod 5, so that the upper valve body 2 can be connected. At this time, the oil can be discharged through the upper valve body 2.

[0049] Preferably, by adjusting the pressure inside the delivery pipe 3, the multi-stage locking mechanism can be locked when the delivery pipe 3 is not in operation, so as to ensure the anti-theft effect of the oil drain valve. When the delivery pipe 3 is in the oil draining state and the pressure inside the delivery pipe 3 reaches the set value, the multi-stage locking mechanism can be unlocked so that the upper valve body 2 can be opened and the oil draining action can be performed.

[0050] Please see Figures 3-8The pressurizing and pushing mechanism includes a guide disk 11 and a pushing disk 17 that slide along the axial direction of the rotating sleeve 10. The guide disk 11 and the pushing disk 17 are respectively formed with a first through hole 12 and a second through hole 18 that communicate and cooperate with each other. It also includes a guide assembly disposed on the guide disk 11 and the pushing disk 17 for restricting the rotation of the guide disk 11 and controlling the rotation of the pushing disk 17. The guide assembly includes a first follower rod 19 and a second follower rod 25 fixed on both sides of the pushing disk 17. The second follower rod 25 passes through the rotating ring 21. A connecting plate 20 that is slidably connected to the first follower rod 19 is fixed on the rotating sleeve 10. A guide post 14 that passes through the fixed plate 4 is fixed on the guide disk 11.

[0051] Please see Figures 3-8 The triggering rotation mechanism includes a guide groove and a spiral groove 1005 formed on the outer circumference of the rotating sleeve 10. A first limiting block 1101 that slides into the guide groove is fixed on the inner wall of the guide plate 11. A movable ring 13 that slides along the axial direction of the guide post 14 is slidably mounted on the rotating sleeve 10. A second limiting block 1301 that slides into the spiral groove 1005 is fixed on the inner wall of the movable ring 13. The triggering rotation mechanism also includes a first spring 15 and a second spring 16 sleeved on the rotating sleeve 10. The two ends of the first spring 15 abut against the guide plate 11 and the movable ring 13 respectively, and the two ends of the second spring 16 abut against the movable ring 13 and the fixed plate 4 respectively. The guide groove includes a first vertical groove 1001, a first annular groove 1002, a second vertical groove 1003, and a second annular groove 1004 formed on the outer circumference of the rotating sleeve 10. The first vertical groove 1001, the first annular groove 1002, the second vertical groove 1003, and the second annular groove 1004 are connected to each other in sequence.

[0052] In detail, the two ends of the delivery pipe 3 are connected to the lower valve body 1 and the shut-off valve respectively via flanges. Oil can enter the delivery pipe 3 through the shut-off valve. Please refer to [link to relevant documentation]. Figures 6-8 When the oil is not drained, the oil pressure in the delivery pipe 3 is relatively small, and the first spring 15 and the second spring 16 are in a compressed state. The elastic potential energy of the second spring 16 is greater than that of the first spring 15. Therefore, the movable ring 13 tends to move towards the guide plate 11. Under the action of the first spring 15, the guide plate 11 and the push plate 17 are controlled to be at the end of their stroke away from the fixed plate 4. The supporting force provided by the first spring 15 to the guide plate 11 is greater than the force provided by the oil pressure on the push plate 17. At this time, under the action of the movable ring 13, the second limiting block 1301 is located at the end of the stroke of the spiral groove 1005 away from the fixed plate 4. Under the action of the guide plate 11, the first limiting block 1101 is located at the connection position between the first vertical groove 1001 and the second annular groove 1004.

[0053] Please see Figure 4 , Figure 8 In this situation, the first through hole 12 and the second through hole 18 are misaligned, so that the delivery pipe 3 and the lower valve body 1 are isolated by the push plate 17. Under the action of the guide post 14, the guide plate 11 can only slide along the axial direction of the guide post 14 and cannot rotate. Under the action of the first follower rod 19 and the connecting plate 20, the push plate 17 can slide along the axial direction of the rotating sleeve 10 and rotate with the rotating sleeve 10. Therefore, under the action of the second spring 16, the position of the movable ring 13 can be ensured not to change, so that the rotation of the rotating sleeve 10 can be restricted by the second limit block 1301 and the spiral groove 1005, thereby ensuring that the push plate 17 will not rotate, so that the delivery pipe 3 is always in a blocked state during the oil delivery process. Since the push plate 17 cannot rotate, the rotating ring 21 can also be kept in a fixed state by the second follower rod 25, so as to ensure that the multi-stage locking mechanism is always in a locked state and cannot be controlled by external means to move the sealing plate 6, thereby achieving the anti-theft effect.

[0054] When oil needs to be drained, the shut-off valve can be opened to pressurize the oil tank, increasing the oil pressure in the delivery pipe 3. When the force provided by the oil pressure to the push plate 17 exceeds the supporting force provided by the first spring 15 and the second spring 16, the push plate 17 will move axially along the rotating sleeve 10 and toward the fixed plate 4, thereby driving the guide plate 11 to move synchronously along the axial direction of the guide post 14, compressing the first spring 15. The guide plate 11 will also drive the first limiting block 1101 into the first vertical groove 1001. As the spring 15 is gradually compressed, the elastic potential energy of the first spring 15 will exceed that of the second spring 16, causing the movable ring 13 to tend to move toward the fixed plate 4. However, since the guide plate 11 will not rotate, the rotating sleeve 10 can be controlled to remain in a fixed state under the action of the first limiting block 1101 and the first vertical groove 1001. Only when the rotating sleeve 10 rotates can the movable ring 13 slide along the guide post 14 under the action of the spiral groove 1005 and the second limiting block 1301. In this way, the movable ring 13 will always remain in a fixed state.

[0055] Subsequently, when the pressure in the conveying pipe 3 reaches the set value, the first limiting block 1101 moves to the position where the first vertical groove 1001 and the first annular groove 1002 are connected. At this time, the rotating sleeve 10 is no longer locked. Under the action of the first spring 15, it pushes the movable ring 13 to slide along the axial direction of the guide post 14 and move towards the fixed plate 4, thereby compressing the second spring 16. At the same time, the movable ring 13 will also drive the second limiting block 1301 to slide along the spiral groove 1005, so that the rotating sleeve 10 rotates, so that the first limiting block 1101 slides relative to the rotating sleeve 10 along the first annular groove 1002. When the first limiting block 1101 moves to the position where the first annular groove 1002 and the second vertical groove 1003 are connected, the rotation angle of the rotating sleeve 10 reaches the maximum. At this time, the elastic potential energy of the first spring 15 is still greater than the elastic potential energy of the second spring 16.

[0056] When the rotating sleeve 10 rotates, it will also drive the connecting plate 20 to move synchronously. Thus, the first follower rod 19 controls the push plate 17 to rotate synchronously with the rotating sleeve 10. The push plate 17 will drive the second through hole 18 to move to the position of communicating with the first through hole 12, so that the delivery pipe 3 communicates with the lower valve body 1. The oil in the delivery pipe 3 will enter the lower valve body 1 through the second through hole 18 and the first through hole 12. The push plate 17 will also control the rotating ring 21 to move through the second follower rod 25 to perform the unlocking action on the multi-stage locking mechanism, so as to facilitate the normal oil discharge action of the subsequent multi-stage locking mechanism.

[0057] Preferably, during transportation, the oil in the delivery pipe 3 will inevitably experience pressure fluctuations due to bumps and shaking. The pre-compression force provided by the first spring 15 and the second spring 16 can effectively prevent displacement of the push plate 17 due to pressure fluctuations, thus ensuring the anti-theft effect of the oil drain valve. At the same time, when the oil drain valve is in the oil draining state, the elastic potential energy change of the first spring 15 and the second spring 16 can enable the rotating sleeve 10 to quickly rotate to a specified angle when the oil pressure in the delivery pipe 3 reaches the set value. The push plate 17 controls the second through hole 18 to connect with the first through hole 12, which can not only automatically control the connection between the delivery pipe 3 and the lower valve body 1 when the oil draining state is in effect, but also unlock the multi-stage locking mechanism to facilitate the normal execution of the subsequent oil draining action.

[0058] As oil draining continues, the force exerted by the oil pressure on the push plate 17 will gradually become less than the supporting force provided by the first spring 15 and the second spring 16. Under the action of the first spring 15, the guide plate 11 and the push plate 17 are controlled to move toward their initial positions, causing the first limiting block 1101 to enter the second vertical groove 1003. Under the action of the first limiting block 1101 and the second vertical groove 1003, the rotation of the rotating sleeve 10 is also restricted, so that the position of the movable ring 13 does not change. As the elastic potential energy of the first spring 15 is gradually released, the elastic potential energy of the first spring 15 will gradually become less than the elastic potential energy of the second spring 16. Under the action of the second spring 16, the movable ring 13 tends to move toward the guide plate 11. When the oil draining is completed, the guide plate 11... When the guide plate 11 and the push plate 17 return to their initial positions, the first limiting block 1101 moves to the position where the second vertical groove 1003 and the second annular groove 1004 are connected. The rotating sleeve 10 is no longer restricted, the second spring 16 is released elastically, and the movable ring 13 is quickly controlled to move towards the guide plate 11 to control the second limiting block 1301 to slide along the spiral groove 1005, so that the rotating sleeve 10 rotates towards the initial angle to control the push plate 17 to rotate. When the first limiting block 1101 moves to the position where the first vertical groove 1001 and the first annular groove 1002 are connected, it means that the rotation angle of the push plate 17 and the rotating sleeve 10 is at the initial value. At this time, the second through hole 18 is separated from the first through hole 12 again, and the delivery pipe 3 and the lower valve body 1 are isolated again.

[0059] Preferably, by cooperating with the guide groove and the first limiting block 1101, and the spiral groove 1005 and the second limiting block 1301, the oil discharge process is only carried out when the oil pressure reaches the set value. After the oil discharge is completed, the delivery pipe 3 is only sealed when the oil pressure returns to the oil pressure before the discharge. This ensures that the oil is discharged quickly and smoothly, and that the oil is discharged completely. It also prevents the delivery pipe 3 from being blocked due to high oil pressure, which would cause excessive pressure on the inner wall of the delivery pipe 3, leading to damage or reduced lifespan of the delivery pipe 3.

[0060] Please see Figures 1-4 , Figure 6 , Figures 9-12The multi-stage locking mechanism includes a limiting wheel 7 fixed on the sliding rod 5, a handle 8 rotatably mounted on the outer wall of the upper valve body 2, a cam 9 fixed on the handle 8 that abuts against the limiting wheel 7, a limiting component provided on the rotating ring 21, the limiting component including a limiting ring 22 fixed on the rotating ring 21, a limiting groove 2201 and an arc-shaped inclined groove 2202 formed in the limiting ring 22, the limiting component also including a fixing ring 23 fixed on the sliding rod 5 and abutting against the limiting ring 22, the fixing ring 23 slidingly engaging with the limiting groove 2201 and the arc-shaped inclined groove 2202, a third spring 24 sleeved on the sliding rod 5, the two ends of the third spring 24 abutting against the fixing ring 23 and the sealing disc 6 respectively.

[0061] It should be noted that the arc groove 2202 is opened in the circumferential direction of the limiting ring 22 and is set in an inclined shape inside the arc groove. The arc groove 2202 is connected to the limiting groove 2201. During the oil transportation process, the oil pressure in the delivery pipe 3 is small, and the push plate 17 will not rotate. Under the action of the second follower rod 25, the rotation of the rotating ring 21 is restricted, so that the fixed ring 23 and the limiting groove 2201 are in a misaligned state. The third spring 24 is in a compressed state, so that the fixed ring 23 and the limiting ring 22 are in an abutting state. Under the action of the limiting ring 22, the position of the fixed ring 23 is locked to ensure that the position of the sealing plate 6 will not change and always perform a sealing action on the upper valve body 2. Under the action of the handle 8, the position of the sliding rod 5 is further locked by the cam 9 and the limiting wheel 7.

[0062] When oil draining is required, the handle 8 can be held and the cam 9 can be driven to rotate, causing the cam 9 to separate from the limit wheel 7. At the same time, as the pressure in the delivery pipe 3 rises to the set value, the push plate 17 will slide along the axis of the rotating sleeve 10 and rotate a certain angle with the rotating sleeve 10, so as to drive the rotating ring 21 to rotate through the second follower rod 25. The rotating ring 21 will drive the limit groove 2201 to move to the position of engaging with the fixed ring 23. At this time, the third spring 24 is released elastically, so that the fixed ring 23 can pass smoothly through the limit groove 2201 and completely penetrate the arc inclined groove 2202. The fixed ring 23 will also drive the sliding rod 5 to move, thereby driving the sealing plate 6 and the limit wheel 7 to move towards the fixed plate 4, so that the upper valve body 2 is open. When the limit wheel 7 moves to the position of abutting with the cam 9, it means that the conduction area of ​​the upper valve body 2 has reached the maximum.

[0063] Subsequently, after the oil draining is completed, the oil pressure in the delivery pipe 3 returns to its initial value. With the cooperation of the booster push mechanism and the trigger rotation mechanism, the rotating sleeve 10 returns to its initial angle, so that the rotating ring 21 is driven back to its initial angle through the push disc 17 and the second follower rod 25. The limiting groove 2201 is once again in a misaligned state with the fixed ring 23, while the arc-shaped inclined groove 2202 is still in the position of engaging with the fixed ring 23. At this time, the cam 9 can be rotated by the handle 8, so that the sliding rod 5 can be moved away from the fixed plate 4 through the limiting wheel 7. The sliding rod 5 will also drive the fixed ring 23 and the sealing disc 6 to move. When the fixed ring 23 enters the arc-shaped inclined groove 2202, the fixed ring 23 slides along the arc-shaped inclined surface of the arc-shaped inclined groove 2202, so that the limiting ring 22 rotates, so that the push disc 17 is rotated through the rotating ring 21 and the second follower rod 25, so as to control the rotation of the rotating sleeve 10. When the first limiting block 1101 slides relative to the rotating sleeve 10 along the second annular groove 1004, the rotating sleeve 10 rotates, and the moving ring 13 is controlled to move through the second limiting block 1301 and the spiral groove 1005, and the second spring 16 is compressed. Therefore, the vertical support force provided by the handle 8 only needs to overcome the resistance provided by the second spring 16 to achieve the fixed ring 23 passing through the arc groove 2202. When the fixed ring 23 passes through the arc groove 2202 and the limiting groove 2201, the sealing disc 6 seals the upper valve body 2 again, the limiting ring 22 is no longer subjected to rotational force, the second spring 16 is released elastically, and the rotating sleeve 10 is reset through the second limiting block 1301 and the spiral groove 1005 to control the rotating ring 21 to rotate to the initial angle. At this time, the fixed ring 23 is misaligned with the limiting groove 2201 again, thereby locking the fixed ring 23 again.

[0064] Preferably, the multi-stage locking mechanism ensures that the sealing disc 6 cannot be controlled to move regardless of the movement of the handle 8 before oil discharge, thus preventing oil theft from the oil discharge valve. After oil discharge is completed, the handle 8 can control the fixed ring 23 to reset, and after the fixed ring 23 is reset, the position of the fixed ring 23 is locked again by the multi-stage locking mechanism. In summary, the dual locking of the multi-stage locking mechanism provides a multi-stage anti-theft effect for the oil discharge valve.

[0065] An application of an anti-theft oil drain valve in oil transportation, comprising the aforementioned anti-theft oil drain valve.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0067] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A theft-proof oil type drain valve, comprising: a lower valve body, and an upper valve body and a delivery pipe fixed on both ends of the lower valve body, a fixed plate being fixed on the inner wall of the delivery pipe; characterized in that it further comprises: a sliding rod slidingly installed on the fixed plate, an end of the sliding rod being fixed with a sealing disc; a pressure boosting pushing mechanism arranged on the fixed plate, a rotating sleeve being connected to the pressure boosting pushing mechanism, a trigger rotating mechanism being further arranged on the fixed plate, the pressure boosting pushing mechanism being capable of driving the rotating sleeve to rotate through the trigger rotating mechanism when the pressure in the delivery pipe increases, and adjusting the conduction state of the delivery pipe; a rotating ring rotatingly installed in the upper valve body and connected with the pressure boosting pushing mechanism, a plurality of stages of locking mechanisms being arranged on the rotating ring, the plurality of stages of locking mechanisms being capable of controlling the sliding rod to axially slide when the rotating ring rotates, so as to adjust the conduction state of the upper valve body through the sealing disc; when the pressure in the delivery pipe reaches a set value, the trigger rotating mechanism will control the rotating sleeve to rotate, so as to control the delivery pipe to be conducted with the lower valve body through the pressure boosting pushing mechanism, at the same time, the trigger rotating mechanism will also drive the rotating ring to rotate, so that the plurality of stages of locking mechanisms are no longer locked, at this time, the plurality of stages of locking mechanisms can be controlled to move, and the sealing disc is controlled to move towards the lower valve body through the sliding rod, so that the upper valve body is conducted; the plurality of stages of locking mechanisms comprise a limiting wheel fixed on the sliding rod, a handle being rotatingly installed on the outer wall of the upper valve body, a cam being fixed on the handle and abuttingly matched with the limiting wheel, a limiting assembly being arranged on the rotating ring; the limiting assembly comprises a limiting ring fixed on the rotating ring, a limiting groove and a circular arc inclined groove being formed in the limiting ring; the limiting assembly further comprises a fixed ring fixed on the sliding rod and abuttingly matched with the limiting ring, the fixed ring being slidingly matched with the limiting groove and the circular arc inclined groove, a third spring being sleeved on the sliding rod, two ends of the third spring being respectively abutted with the fixed ring and the sealing disc; the pressure boosting pushing mechanism comprises a conduction disc and a pushing disc axially sliding along the rotating sleeve, the conduction disc and the pushing disc respectively forming a first conduction hole and a second conduction hole which are mutually conducted; the further comprises a guide assembly arranged on the conduction disc and the pushing disc, for limiting the conduction disc to rotate and controlling the pushing disc to rotate.

2. A theft deterrent oil drain valve according to claim 1 wherein, the guide assembly comprises a first follower and a second follower fixed on both sides of the pushing disc, the second follower penetrating the rotating ring, a connecting plate being fixed on the rotating sleeve and slidingly connected with the first follower, a guide column being fixed on the conduction disc and penetrating the fixed plate.

3. A theft deterrent oil drain valve according to claim 2 wherein, the trigger rotating mechanism comprises a guide groove and a spiral groove being opened on the circumferential outer wall of the rotating sleeve, a first limiting block being fixed on the inner wall of the conduction disc and slidingly fitted in the guide groove, an active ring being slidingly installed on the rotating sleeve and axially sliding along the guide column, a second limiting block being fixed on the inner wall of the active ring and slidingly fitted in the spiral groove.

4. A theft deterrent oil drain valve according to claim 3 wherein, The trigger rotating mechanism further comprises a first spring and a second spring sleeved on the rotating sleeve, two ends of the first spring respectively abutting against the conducting disc and the movable ring, and two ends of the second spring respectively abutting against the movable ring and the fixed plate.

5. An antitheft oil drain valve according to claim 3, wherein The guide groove comprises a first vertical groove, a first annular groove, a second vertical groove and a second annular groove formed on the circumferential outer wall of the rotating sleeve, and the first vertical groove, the first annular groove, the second vertical groove and the second annular groove are sequentially connected with each other in a head-tail manner.

6. The use of a theft-proof oil drain valve in oil product delivery, characterized in that, The oil leakage valve comprises the anti-theft oil valve as claimed in any one of claims 1-5.

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