Leak-proof petroleum pipeline valve

Abstract

The invention relates to the technical field of valves, in particular to a leakproof petroleum pipeline valve which comprises a valve seat, a valve rod, a valve element, a rotating wheel, a driving mechanism, a push plate, a sealing mechanism and a sealing ring which are installed on a pipeline body, the valve rod is installed above the valve rod, the valve element is installed at the bottom end of the valve rod, the rotating wheel is installed above the valve rod, and the driving mechanism is installed above the rotating wheel. The driving mechanism is installed below the valve element, the push plates are installed on the two sides of the valve element, the sealing mechanism is installed at the position of the valve element, the sealing rings are installed at the positions of the push plates, the sealing rings are slidably connected with the pipeline body, and the boundary of the sealing position is changed by changing the edge position of a valve flashboard before and after the valve is opened. Meanwhile, accumulated liquid of petroleum at the valve core of the valve is reduced, so that the sealing effect of the valve is improved, and the corrosion of the petroleum to the valve is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to an anti-leakage petroleum pipeline valve. Background Art

[0002] Oil pipeline valves are devices used to control the flow of fluids in oil pipelines. Their main function is to regulate, stop or change the flow direction of fluids in pipelines. Valves play a vital role in the oil and gas industry, ensuring the safe and efficient operation of pipeline systems.

[0003] When oil circulates in oil pipelines, based on its own characteristics, it has a certain viscosity and corrosiveness. Therefore, gate valves are often used as valves for oil pipeline circulation. As the valve is opened and closed, the gate valve can withstand the greater fluid pressure of the oil, and at the same time can provide sealing when closed. It is suitable for oil pipelines that need to be opened or closed stably for a long time; however, in the process of long-term circulation of oil, the corrosiveness of the oil itself will cause erosion to the valve. At the same time, long-term and frequent opening and closing of the valve will cause wear between the valve seat and the gate, thereby affecting the sealing of the valve. The viscosity of the oil will cause the oil to accumulate at the gate. On the one hand, it will cause the oil to erode the edge of the gate, and on the other hand, it will penetrate into the gap, which is easy to cause leakage of the gate.

[0004] In response to the above situation, the prior art provides a variety of solutions, such as a water accumulation and discharge gate valve with patent number CN202110935900.5, which uses the cooperation of a buffer plate and a diversion mesh plate to reduce the pressure of water flow impacting the valve plate, and at the same time uses air pressure to push the float ball upward in the funnel section, and uses the principle of a float valve to achieve the effect of water accumulation and discharge, thereby achieving the dredging of the liquid at the gate plate. However, the viscosity of petroleum is relatively high, making it difficult for the ball to float, and thus it is difficult to achieve the method of water accumulation and discharge. At the same time, the accumulated petroleum will destroy the sealing performance of the valve, further aggravating the leakage problem.

[0005] Based on this, in order to solve the problem that oil accumulates near the gate due to valve closure, thereby destroying the sealing performance of the valve, and oil corrodes the valve, aggravating the leakage at the valve, the present invention designs an anti-leakage oil pipeline valve. Summary of the invention

[0006] The present invention provides an anti-leakage petroleum pipeline valve; it solves the problem that oil accumulates near the gate plate due to valve closure, thereby damaging the sealing performance of the valve, and the corrosion of the valve by oil aggravates the leakage of the valve; by changing the edge position of the valve gate before and after the valve is opened, thereby changing the boundary of the sealing part, and reducing the accumulation of oil in the valve core, on the one hand, the sealing effect of the valve is improved, and on the other hand, the corrosion of the valve by oil is reduced.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides an anti-leakage petroleum pipeline valve, comprising a valve seat, a valve stem, a valve core, a runner, a driving mechanism, a push plate, a sealing mechanism, and a sealing ring installed on a pipeline body. The valve stem is installed above the valve stem, the valve core is installed at the bottom of the valve stem, the runner is installed above the valve stem, the driving mechanism is installed below the valve core, the push plate is installed on both sides of the valve core, the sealing mechanism is installed at the valve core, the sealing ring is installed at the push plate, and the sealing ring is slidably connected to the pipeline body. When the valve core moves downward, the push plate is driven by the driving mechanism to move toward both sides of the valve core. The push plate drives the sealing ring to scrape the petroleum at the valve core through the sealing mechanism. The sealing ring also transfers the boundary point between the petroleum and the valve core to the inner boundary of the sealing ring, which reduces the corrosion of the valve to the petroleum on the one hand and avoids the problem of the valve core being difficult to open normally due to the clogging of the valve core by petroleum impurities on the other hand.

[0009] Preferably, the driving mechanism includes a limit groove, a driving block, a movable groove, a triangular block, a wedge block, a special-shaped block, and a reset spring. The limit groove is arranged at a position of the pipeline body corresponding to the valve core, the driving block is installed in the limit groove, the movable groove is arranged on the upper surface of the driving block, the triangular block is installed at the top of the movable groove, the wedge block is installed below the triangular block, the special-shaped block is installed above the wedge block, the reset spring is installed between the special-shaped block and the pipeline body, and the other side of the special-shaped block is connected to the push plate. When the valve core rises, the triangular block is not subjected to the force of the valve core, and the push plate is reset by the reset spring and returns to its original position, thereby realizing that the push plate is away from the valve core. On the one hand, the impurities accumulated at the valve core are moved to a position away from the valve core, and on the other hand, a disturbance of the water flow is formed, thereby making the oil that is about to flow smoother.

[0010] Preferably, key blocks are installed on the driving block, triangular block, wedge block and special-shaped block, and key slots are opened at the corresponding key blocks of the pipeline body. The key slots of the triangular block and the wedge block are arc-shaped, so they can move along the pipeline trajectory, while the special-shaped block needs to drive the push plate upward, so the key slot of the special-shaped block is linear.

[0011] Preferably, the sealing mechanism includes a sealing groove, a slider, a bottom groove, a sealing block and a compression spring. The sealing groove is opened on one side of the bottom of the sealing ring, the slider is installed in the sealing groove, the bottom groove is opened on the other side of the sealing ring, the sealing block is installed in the bottom groove, and the compression spring is installed between the bottom groove and the sealing ring. Under the continued action of the push plate, the sealing block will be squeezed by the valve core, thereby squeezing the compression spring, and then the sealing block will be gradually embedded in the bottom groove. At this time, the oil on the edge of the valve core will be driven upward by the sealing block and gradually stored in the bottom groove, thereby reducing the amount of oil at the edge of the valve core.

[0012] Preferably, a baffle ring is installed above the bottom groove, and a collecting groove is provided on the top of the baffle ring. If the oil from the center position of the sealing ring flows downward along the gap between the sealing ring and the valve core, the oil will be gradually blocked by the baffle ring, reducing liquid accumulation and avoiding blockage.

[0013] Preferably, rubber blocks are installed in an array above the push plate and below the slider, and gaps are provided between the rubber blocks, which can change the flow trend and facilitate the unblocking of water flow on the one hand, and on the other hand, the mutual contact between the two can squeeze and scrape impurities remaining on the surface.

[0014] Preferably, the side section width of the valve core is equal to twice the top section of the triangular block, and the side wall of the valve core is provided with an oblique angle, so that the valve core can be aligned with the limit groove when moving up and down, thereby reducing oil leakage.

[0015] Preferably, an oblique angle is provided on the left side of the push plate, and a progressive ring is installed on the left side of the sealing ring to improve the normal transportation of oil.

[0016] Preferably, the outer edge of the progressive ring is rounded, and the cross-section of the sealing block is a trapezoidal structure, which protects the edge of the sealing ring and increases the service life of the sealing ring.

[0017] Preferably, a rubber layer is installed on the side of the sealing block facing the valve core, and a corrosion-resistant coating is applied to the surface of the rubber layer, so that the sealing block and the valve core are in soft contact, thereby increasing the service life of the valve core.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The present invention proposes a leakage-proof petroleum pipeline valve, which changes the sealing position of the valve core through the normal rise and fall of the valve core in the valve; when the valve core moves upward to open the valve, the valve core will drive the push plate to move away from the valve core through the driving mechanism, and the accumulated liquid and impurities at the valve core will be driven away from the valve core during the movement of the push plate, thereby avoiding the problem of liquid accumulation at the valve core and impurity blockage; in addition, when the valve core moves downward, the push plate also drives the sealing ring to move through the sealing mechanism, thereby making the sealing ring fit the valve core, and the sealing ring blocks and scrapes the edge of the valve core at this time, thereby reducing the amount of oil accumulated at the contact point between the valve core and the pipeline; the sealing ring also transfers the boundary point between the oil and the valve core to the inner boundary of the sealing ring, which on the one hand reduces the corrosion of the valve by the oil, and on the other hand avoids the problem of the valve being difficult to open normally due to the blockage of the valve core by oil impurities.

[0020] 2. The present invention proposes a leakage-proof petroleum pipeline valve. As the distance the valve core moves downward as the wheel rotates, the driving mechanism drives the push plate to move farther, thereby driving the distance between the sealing ring and the valve core closer, thereby gradually forming a mobile protection for the valve, thereby preventing the oil water hammer phenomenon from causing the oil to hit the valve violently when the valve is suddenly closed, thereby causing damage to the valve. Through the wrapping of the sealing rings on both sides, the stress distribution of the valve core is uniform, and as the valve core descends, the sealing rings get closer, the protection of the valve core edge is stronger, thereby improving the protection effect of the valve.

[0021] 3. The present invention proposes a leakage-proof oil pipeline valve. When the valve core moves downward, the push plate moves toward the valve core, and then the push plate is embedded in the sealing groove, pushing the sealing ring to move to the right. At this time, the sealing block in the bottom groove will first contact the surface of the valve core. Under the continuous action of the push plate, the sealing block will be squeezed by the valve core, and then the compression spring will be squeezed. Then the sealing block will be gradually embedded in the bottom groove. At this time, the oil on the edge of the valve core will be driven by the sealing block to move upward and gradually stored in the bottom groove, thereby reducing the amount of oil at the edge of the valve core, thereby reducing oil leakage at the edge of the valve core, and also reducing the corrosion effect of oil on the valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation mode of the present invention or the technical solution in the prior art, the drawings required for use in the specific implementation mode or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are one implementation mode of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a half-section schematic diagram of the present invention;

[0025] Figure 3 The present invention Figure 2 The enlarged view of point A in the middle;

[0026] Figure 4 It is a schematic diagram of the driving mechanism of the present invention;

[0027] Figure 5 yes Figure 4 The enlarged view of point B in the middle;

[0028] Figure 6 is a schematic diagram of the sealing mechanism of the present invention;

[0029] Figure 7 yes Figure 6 Enlarged view of point C in the middle;

[0030] Figure 8 It is a schematic diagram of the progressive ring of the present invention.

[0031] In the figure: 1. pipeline body; 2. valve seat; 3. valve stem; 4. valve core; 5. rotor; 6. driving mechanism; 61. limit groove; 62. triangular block; 63. wedge block; 64. special-shaped block; 65. reset spring; 66. key block; 67. key groove; 7. push plate; 71. rubber block; 8. sealing mechanism; 81. sealing groove; 82. slider; 83. bottom groove; 831. shielding ring; 84. sealing block; 841. rubber layer; 85. compression spring; 9. sealing ring; 91. progressive ring. DETAILED DESCRIPTION

[0032] In order to better understand the above solution, the above technical solution is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] like Figure 1-2 As shown, the present invention provides an anti-leakage petroleum pipeline valve, comprising a valve seat 2, a valve stem 3, a valve core 4, a runner 5, a driving mechanism 6, a push plate 7, a sealing mechanism 8, and a sealing ring 9 installed on a pipeline body 1, wherein the valve stem 3 is installed above the valve stem 3, the valve core 4 is installed at the bottom of the valve stem 3, and the runner 5 is installed above the valve stem 3, which is a conventional gate valve. The runner 5 rotates to drive the valve stem 3 connected thereto to rotate, and the valve stem 3 converts the rotation into linear motion through threaded transmission, and then transmits it to the valve core 4 at the valve seat 2, thereby driving the valve core 4 to move up and down, a driving mechanism 6 is installed below the valve core 4, the push plate 7 is installed on both sides of the valve core 4, a sealing mechanism 8 is installed at the valve core 4, and the sealing ring 9 is installed at the push plate 7, and the sealing ring 9 is slidably connected to the pipeline body 1, when the valve core 4 moves downward, the push plate 7 is driven by the driving mechanism 6 to move to both sides of the valve core 4, and the push plate 7 drives the sealing ring 9 to scrape the petroleum at the valve core 4 through the sealing mechanism 8.

[0034] Through the normal rise and fall of the valve core 4 in the valve, the sealing position of the valve core 4 is changed. When the valve core 4 moves upward to open the valve, the valve core 4 will drive the push plate 7 to move away from the valve core 4 through the driving mechanism 6. During the movement of the push plate 7, the accumulated liquid and impurities at the valve core 4 will be driven away from the valve core 4, thereby avoiding the accumulation of liquid and impurities blocking the valve core 4; in addition, when the valve core 4 moves downward, the push plate 7 also drives the sealing ring 9 to move through the sealing mechanism 8, thereby making the sealing ring 9 fit the valve core 4. At this time, the sealing ring 9 blocks and scrapes the edge of the valve core 4, thereby reducing the accumulation of petroleum at the contact point between the valve core 4 and the pipeline body 1. On the other hand, the sealing ring 9 also transfers the boundary point between the petroleum and the valve core 4 to the inner boundary of the sealing ring 9, on the one hand, reducing the corrosion of the valve by petroleum, and on the other hand, avoiding the problem of the valve being difficult to open normally due to the clogging of the valve core 4 by petroleum impurities.

[0035] At the same time, during the rotation of the wheel 5, as the wheel 5 rotates, the greater the distance that the valve core 4 moves downward, the farther the driving mechanism 6 drives the push plate 7 to move, and thus the distance between the sealing ring 9 and the valve core 4 is closer, thereby gradually forming a mobile protection for the valve to avoid the problem of oil water hammer causing the oil to hit the valve violently when the valve is suddenly closed, thereby causing damage to the valve. Through the wrapping of the sealing rings 9 on both sides, the stress distribution of the valve core 4 is uniform at this time, and as the valve core 4 descends, the closer the sealing ring 9 is, the stronger the protection to the edge of the valve core 4 is, thereby improving the protection effect of the valve.

[0036] like Figure 2 , 3 As shown, the driving mechanism 6 includes a limiting groove 61, a triangular block 62, a wedge block 63, a special-shaped block 64, and a reset spring 65. The limiting groove 61 is arranged at a position of the pipeline body 1 corresponding to the valve core 4, the driving block is installed in the limiting groove 61, the movable groove is arranged on the upper surface of the driving block, the triangular block 62 is installed at the top of the movable groove, the wedge block 63 is installed below the triangular block 62, the special-shaped block 64 is installed above the wedge block 63, the reset spring 65 is installed between the special-shaped block 64 and the pipeline body 1, and the other side of the special-shaped block 64 is connected to the push plate 7.

[0037] When the valve core 4 descends, the rotation of the swivel drives the valve stem 3 to rotate, and the valve stem 3 drives the valve core 4 to descend by means of threaded transmission. When the valve core 4 descends, it drives the valve core 4 to gradually squeeze the triangular block 62 in the limit groove 61, and the triangular block 62 gradually moves downward, and then the triangular block 62 will push the wedge block 63 that moves laterally to move. At this time, one side of the wedge block 63 cooperates with the triangular block 62 in a wedge shape, thereby achieving a driven effect. On the other hand, it also acts as an active part, driving the special-shaped block 64 to move upward. At this time, the top of the special-shaped block 64 is a wedge-shaped surface, which will push the wedge-shaped surface at the lower end of the push plate 7 to move close to the valve core 4, and then drive the push plate 7 to move in the direction close to the valve core 4, thereby driving the bottom of the pipeline body 1 to be scraped and cleaned;

[0038] When the valve core 4 rises, the triangular block 62 is not affected by the force of the valve core 4, and the push plate 7 is reset by the reset spring 65 to return to its original position, thereby realizing that the push plate 7 is away from the valve core 4. On the one hand, the impurities accumulated on the valve core 4 are moved to a position away from the valve core 4, and on the other hand, a disturbance of the water flow is formed, thereby making the oil that is about to flow more smoothly and avoiding the problem of blockage caused by long-term static standing.

[0039] like Figure 4 , 5 As shown, key blocks 66 are installed on the triangular block 62 , the wedge block 63 and the special-shaped block 64 , and key grooves 67 are provided at positions of the pipe body 1 corresponding to the key blocks 66 .

[0040] The key block 66 and the key groove 67 are used to realize the stable movement of the triangular block 62, the wedge block 63 and the special-shaped block 64. In order to realize the normal movement in the pipeline body 1, the key groove 67 of the triangular block 62 and the wedge block 63 is arc-shaped, so that it can move along the trajectory of the pipeline body 1, and the special-shaped block 64 needs to drive the push plate 7 upward, so the key groove 67 of the special-shaped block 64 is linear, and then cooperates with the push plate 7 to enable the push plate 7 to move in the horizontal direction, thereby improving the smooth transmission of the fluid at the valve core 4.

[0041] like Figure 6 , 7 As shown, the sealing mechanism 8 includes a sealing groove 81, a slider 82, a bottom groove 83, a sealing block 84 and a compression spring 85. The sealing groove 81 is opened on one side of the bottom of the sealing ring 9, the slider 82 is installed in the sealing groove 81, the bottom groove 83 is opened on the other side of the sealing ring 9, the sealing block 84 is installed in the bottom groove 83, and the compression spring 85 is installed between the bottom groove 83 and the sealing ring 9.

[0042] When the valve core 4 moves downward, the push plate 7 moves toward the valve core 4, and then the push plate 7 is embedded in the sealing groove 81, pushing the sealing ring 9 to move to the right. At this time, the sealing block 84 in the bottom groove 83 will first contact the surface of the valve core 4. Under the continuous action of the push plate 7, the sealing block 84 will be squeezed by the valve core 4, and then the compression spring 85 will be squeezed. Then the sealing block 84 will be gradually embedded in the bottom groove 83. At this time, the oil on the edge of the valve core 4 will be driven by the sealing block 84 to move upward and gradually stored in the bottom groove 83, thereby reducing the amount of oil at the edge of the valve core 4, thereby reducing the oil leakage at the edge of the valve core 4, and also reducing the corrosion effect of the oil on the valve core 4.

[0043] A shielding ring 831 is installed above the bottom groove 83 , and a collecting groove is provided on the top of the shielding ring 831 .

[0044] Through the blocking ring 831, when the valve is closed, if the oil from the center position of the sealing ring 9 flows downward along the gap between the sealing ring 9 and the valve core 4, the oil will be gradually blocked by the blocking ring 831 and then enter the collecting groove. When the oil flows normally, this part of the oil will also flow normally. At the same time, the collecting groove and the sealing groove 81 can be connected here, but a one-way manner needs to be formed there, which can be specifically a one-way valve or a one-way membrane, etc., so that the oil at the valve core 4 can flow back to the push plate 7, thereby reducing the accumulation effect of oil at the valve core 4.

[0045] Rubber blocks 71 are installed in an array above the push plate 7 and below the slider 82 , and gaps are provided between the rubber blocks 71 .

[0046] When the push plate 7 moves into the sealing groove 81, the push plate 7 and the slider 82 will squeeze each other, and the rubber block 71 between the two will change the longitudinal flow trend of the oil there. On the one hand, it can change the flow trend and facilitate the unblocking of water flow. On the other hand, the mutual contact between the two can squeeze and scrape the impurities remaining on the surface, thereby avoiding the accumulation of liquid or impurities on the surface of the push plate 7 and the slider 82, which affects the normal use of the push plate 7.

[0047] The side section width of the valve core 4 is equal to twice the top section width of the triangular block 62 , and the side wall of the valve core 4 is provided with an oblique angle.

[0048] When the valve core 4 moves downward, it just fits with the edge of the triangular block 62, so that the triangular block 62 can completely block the sunken position of the valve core 4 when it is reset. On the one hand, when the valve core 4 moves away, a spring can be added to the bottom of the triangular block 62, and the triangular block 62 can be quickly reset, thereby pushing up the impurities and improving the cleaning effect of the impurities on the valve core 4. On the other hand, the valve core 4 can be flush with the edge when pressed down, and impurities will not fall into the gap between the triangular plate and the inside of the limit groove 61, thereby reducing the problem of jamming; at the same time, the sealing ring 9 is used to achieve double sealing of the valve to avoid oil leakage.

[0049] like Figure 8 As shown, the left side of the push plate 7 is provided with an oblique angle, and a progressive ring 91 is installed on the sealing ring 9. The outer edge of the progressive ring 91 is rounded, and the cross section of the sealing block 84 is a trapezoidal structure.

[0050] An oblique angle is provided on the left side of the push plate 7, so that when the oil circulates normally, the push plate 7 will not provide resistance to the oil, and it also prevents the oil from getting stuck on the left side of the push plate 7, causing problems such as impurity accumulation and oil accumulation; the same is true for the progressive ring 91 on the left side of the sealing ring 9, but the progressive ring 91 can also achieve the effect of protecting the sealing ring 9. By wrapping the edge of the sealing ring 9 with the progressive ring 91, the sealing ring 9 can play a buffering role even if it is in hard contact with the valve core 4 when the impact force of the oil is large. On the one hand, it protects the sealing ring 9, and on the other hand, it also protects the valve core 4, thereby improving the use efficiency of the valve core 4.

[0051] A rubber layer 841 is installed on the side of the sealing block 84 facing the valve core 4 , and a corrosion-resistant coating is applied on the surface of the rubber layer 841 .

[0052] The sealing block 84 will continuously contact and squeeze the valve core 4, so the rubber layer 841 can protect the sealing block 84. At the same time, the rubber layer 841 can block the oil, thereby reducing the problem of excessive oil flowing from between the sealing block 84 and the valve core 4 to the bottom of the valve core 4.

[0053] When the valve needs to be closed, the staff rotates the swivel, and the rotation of the swivel drives the valve stem 3 to rotate clockwise. The valve stem 3 drives the valve core 4 to descend through thread transmission. When the valve core 4 descends, it drives the valve core 4 to gradually squeeze the triangular block 62 in the limit groove 61, and the triangular block 62 gradually moves downward, and then the triangular block 62 will push the wedge block 63 that moves laterally to move. At this time, one side of the wedge block 63 is wedge-shaped with the triangular block 62, and the other side of the wedge block 63 is wedge-shaped with the special-shaped block 64, and then the wedge block 63 drives the special-shaped block 64 to move upward. At this time, the top of the special-shaped block 64 is a wedge-shaped surface, which will push the wedge surface of the lower end of the push plate 7 to move close to the valve core 4, and then drive the push plate 7 to move in the direction close to the valve core 4, and then drive the bottom of the pipeline body 1 to be scraped and cleaned;

[0054] When the push plate 7 moves toward the valve core 4, the push plate 7 gradually squeezes the rubber layer 841 on the slider 82 and embeds into the sealing groove 81, pushing the sealing ring 9 to move rightward. At this time, the sealing block 84 in the bottom groove 83 will first contact the surface of the valve core 4. Under the continuous action of the push plate 7, the sealing block 84 will be squeezed by the valve core 4, and then the compression spring 85 will be squeezed. Then the sealing block 84 will gradually embed into the bottom groove 83. At this time, the oil on the edge of the valve core 4 will be driven by the sealing block 84 to move upward and gradually stored in the bottom groove 83, thereby reducing the oil leakage at the edge of the valve core 4.

[0055] When the valve needs to be opened, the valve stem 3 is rotated counterclockwise through the swivel ring, and the valve stem 3 drives the valve core 4 to rise. At this time, the triangular block 62 is not subjected to the force of the valve core 4, and the push plate 7 is reset by the reset spring 65, and then returns to the original position, thereby realizing that the push plate 7 is away from the valve core 4. At the same time, the push plate 7 will successively drive the special-shaped block 64, the wedge block 63 and the triangular block 62 to reset, and then restore to the original state; the sealing ring 9 loses the squeezing of the push plate 7 at this time, and is reset by the compression spring 85, and the sealing ring 9 gradually moves away from the valve core 4, so that the oil can flow normally.

[0056] The basic principles and beneficial effects of the present invention are shown and described above. At the same time, the present invention is not limited to the above embodiments. Without departing from the effects and scope of the present invention, the present invention may have various changes and improvements. These changes and improvements all fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A leak-proof petroleum pipeline valve, characterized in that: The invention comprises a valve seat (2), a valve stem (3), a valve core (4), a rotating wheel (5), a driving mechanism (6), a push plate (7), a sealing mechanism (8) and a sealing ring (9) which are installed on a pipeline body (1). The valve stem (3) is installed above the valve stem (3), the valve core (4) is installed at the bottom of the valve stem (3), the rotating wheel (5) is installed above the valve stem (3), the driving mechanism (6) is installed below the valve core (4), the push plate (7) is installed on both sides of the valve core (4), the sealing mechanism (8) is installed at the valve core (4), the sealing ring (9) is installed at the push plate (7), and the sealing ring (9) is slidably connected to the pipeline body (1). When the valve core (4) moves downward, the driving mechanism (6) drives the push plate (7) to move toward both sides of the valve core (4), and the push plate (7) drives the sealing ring (9) through the sealing mechanism (8) to scrape the oil at the valve core (4).

2. The anti-leakage petroleum pipeline valve according to claim 1, characterized in that: The driving mechanism (6) comprises a limiting groove (61), a triangular block (62), a wedge block (63), a special-shaped block (64), and a return spring (65); the limiting groove (61) is arranged at a position of the pipeline body (1) corresponding to the valve core (4); the triangular block (62) is installed at the top of the limiting groove (61); the wedge block (63) is installed below the triangular block (62); the special-shaped block (64) is installed above the wedge block (63); the return spring (65) is installed between the push plate (7) and the pipeline body (1); and the other side of the special-shaped block (64) is connected to the push plate (7).

3. The anti-leakage petroleum pipeline valve according to claim 2, characterized in that: The triangular block (62), the wedge block (63) and the special-shaped block (64) are all equipped with key blocks (66), and the pipe body (1) is provided with a key groove (67) at a position corresponding to the key block (66).

4. The anti-leakage petroleum pipeline valve according to claim 1, characterized in that: The sealing mechanism (8) comprises a sealing groove (81), a slider (82), a bottom groove (83), a sealing block (84) and a compression spring (85); the sealing groove (81) is provided at one side of the bottom of the sealing ring (9); the slider (82) is installed in the sealing groove (81); the bottom groove (83) is provided at the other side of the sealing ring (9); the sealing block (84) is installed in the bottom groove (83); and the compression spring (85) is installed between the sealing block (84) and the sealing ring (9).

5. The anti-leakage petroleum pipeline valve according to claim 4, characterized in that: A shielding ring (831) is installed above the bottom groove (83), and a collecting groove is provided on the top of the shielding ring (831).

6. The anti-leakage petroleum pipeline valve according to claim 2 or 4, characterized in that: Rubber blocks (71) are installed in an array above the push plate (7) and below the sliding block (82), and gaps are provided between the rubber blocks (71).

7. The anti-leakage petroleum pipeline valve according to claim 6, characterized in that: The side cross-sectional width of the valve core (4) is equal to twice the top cross-sectional width of the triangular block (62), and the side wall of the valve core (4) is provided with an oblique angle.

8. The anti-leakage petroleum pipeline valve according to claim 6, characterized in that: The left side of the push plate (7) is provided with an oblique angle, and the left side of the sealing ring (9) is provided with a progressive ring (91).

9. The anti-leakage petroleum pipeline valve according to claim 8, characterized in that: The outer edge of the progressive ring (91) is rounded, and the cross-section of the sealing block (84) is a trapezoidal structure.

10. The anti-leakage petroleum pipeline valve according to claim 7, characterized in that: A rubber layer (841) is installed on the side of the sealing block (84) facing the valve core (4), and a corrosion-resistant coating is applied to the surface of the rubber layer (841).

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