A backflow prevention device for petroleum machinery

Abstract

The present invention discloses an anti-backflow device for petroleum machinery, which relates to the field of petroleum technology, and comprises: a bottom plate, a fixing seat is fixedly connected to the top of the bottom plate, a pipeline is fixedly connected to the top of the fixing seat, a first side pipe and a second side pipe are respectively fixedly connected to the outer surface of the pipeline, and a top cover is fixedly connected to the top of the second side pipe; a flow limiting component, which is used to prevent backflow inside the pipeline. In the present invention, when the inside of the pipeline is in a conveying state, the baffle can automatically move away to avoid, and when the baffle is pushed out to avoid, the block will automatically get in place to fix the position of the baffle, and after the pipeline stops conveying, the floating plate will naturally fall and drive the second magnetic plate to fall to release the limit of the block, and at this time the baffle will automatically reset to make the pipeline in an anti-backflow state, and will not affect the conveying flow when the pipeline is in a conveying state, effectively improving the conveying efficiency of the oil pipeline.

Description

Technical Field

[0001] The invention relates to the field of petroleum technology, in particular to a backflow prevention device for petroleum machinery. Background Art

[0002] An oil pipeline is a pipeline system used to transport oil and oil products. It is one of the main equipment in the oil storage and transportation industry, and is also the most important transportation equipment for crude oil and oil products.

[0003] In the prior art, for example, a backflow prevention device for petroleum machinery in Chinese patent number: CN 220365991 U discloses a backflow prevention component for preventing backflow during the oil pumping process, which is arranged inside the pumping pipe. The backflow prevention component includes a sleeve fixed inside the pumping pipe, a conical groove is provided inside the sleeve, and a ball is connected to the inside of the pumping pipe through a push component. In the backflow prevention device for petroleum machinery of the utility model, the backflow prevention device protects the oil pumping process. Through the mutual cooperation of the adjustment component and the guide component, the elastic force of the push spring on the ball can be reduced during the normal pumping and delivery process, so that the petroleum machinery can drive the ball with less power without counteracting the conical groove, thereby reducing the energy consumption during the operation of the petroleum machinery. In the backflow prevention protection, the elastic force of the push spring on the ball can also be increased to ensure the anti-backflow effect and facilitate the use of the backflow prevention device.

[0004] In the prior art, when the anti-backflow device is used, the rebound force of the spring is used to support the inside of the pipeline to prevent backflow. When the oil in the pipeline is transported, the baffle that plays the anti-backflow role always maintains an evasive position under the impact of the oil transportation flow rate, so that the pipeline is in a connected state. However, at this time, the rebound force generated by the spring will generate pressure on the baffle. When the oil transportation flow rate is small, the baffle will generate a reverse thrust in the transportation direction of the oil, which will cause great interference to the transportation of the oil and affect the normal use of the pipeline.

[0005] Therefore, we propose a backflow prevention device for petroleum machinery to solve the above-mentioned problems. Summary of the invention

[0006] The purpose of the present invention is to provide a backflow prevention device for petroleum machinery to solve the problem of the above-mentioned background technology causing great interference to the transportation of petroleum and affecting the normal use of pipelines.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A backflow prevention device for petroleum machinery, comprising: a bottom plate, a fixing seat is fixedly connected to the top of the bottom plate, a pipeline is fixedly connected to the top of the fixing seat, a first side pipe and a second side pipe are fixedly connected to the outer surface of the pipeline, and a top cover is fixedly connected to the top of the second side pipe; a flow limiting component, the flow limiting component is used to prevent backflow inside the pipeline, the flow limiting component is fixedly connected to the top of the bottom plate, the flow limiting component includes two slide rails, a bracket and a fixing frame, the outer surfaces of the two slide rails are slidably connected with sliders, and a moving seat is fixedly connected between the tops of the two sliders; a positioning component, the positioning component is used to position and fix the flow limiting component, the positioning component is fixedly connected to the moving seat and the first side pipe respectively, and the positioning component includes a box body and two fixing rods; a release component, the release component is used to release the positioning component, the release component is slidably connected to the top cover, and the release component includes a sliding rod; a support component, the support component is used to support and reinforce the release component, the support component is slidably connected to the outer surface of the pipeline, and the support component includes a sliding ring.

[0008] Preferably, the first side tube and the second side tube are both connected to the pipeline, the oil transportation direction of the pipeline is from left to right, the second side tube is located above the first side tube, the first side tube is arranged horizontally, and the second side tube is arranged longitudinally, and the inside of the pipeline is in a transportation state.

[0009] Preferably, the outer surface of the movable seat close to the first side tube is fixedly connected with an insertion rod, the end face of the insertion rod is fixedly connected with a baffle, the baffle is located at the connection position between the pipeline and the first side tube, the baffle is located inside the first side tube, a sealing ring is provided on the outer surface of the baffle, and the outer surface of the sealing ring is in contact with the inner surface of the first side tube.

[0010] Preferably, a cover is slidably connected through the outer surface of the insertion rod, the cover is fixedly connected to the end surface of the first side tube, a limit plate is fixedly connected between the two end surfaces of the slide rails, and the limit plate cooperates with the position of the slider.

[0011] Preferably, a first magnetic attraction ring is fixedly connected to the outer surface of the cover close to the movable seat, and a second magnetic attraction ring is fixedly connected to the outer surface of the movable seat close to the cover. The positions of the first magnetic attraction ring and the second magnetic attraction ring are matched, and the adjacent surfaces of the first magnetic attraction ring and the second magnetic attraction ring are in an oppositely attracted state.

[0012] Preferably, the bracket and the movable seat are matched in position, and the outer surfaces of the bracket and the movable seat on one side adjacent to each other are fixedly connected with positioning rings, and a plurality of first springs are evenly arranged between the two positioning rings.

[0013] Preferably, the bottom of the movable seat is fixedly connected to a base frame, and a plurality of dampers are equidistantly fixedly connected to the outer surface of the fixed frame on one side close to the base frame, and a second spring is sleeved on the outer surfaces of the plurality of dampers, and a support plate is fixedly connected between the end surfaces of the plurality of dampers, and the support plate cooperates with the position of the base frame.

[0014] Preferably, a third spring is symmetrically fixedly connected to the bottom of the box body, an insertion block is fixedly connected between the end surfaces of two third springs, the outer surface of the insertion block is plugged into the inner surface of the box body, a clamping block is fixedly connected to the top of the insertion block, a fixing plate is fixedly connected between the upper end surfaces of the two fixing rods, a clamping slot is provided on the top of the fixing plate, the clamping block matches the position of the clamping slot, the clamping block is located on the inner side of the clamping slot, side panels are fixedly connected to the outer surfaces of both sides of the insertion block near the top, and a first magnetic attraction plate is fixedly connected to the top of the side panels.

[0015] Preferably, the lower end surface of the sliding rod is fixedly connected to a floating plate, the floating plate is located inside the pipeline, the cross-section of the floating plate is smaller than the cross-section of the inner wall of the pipeline, the upper end surface of the sliding rod is fixedly connected to a top plate, the top of the top plate is symmetrically fixedly connected to a connecting plate, the bottoms of the two connecting plates are fixedly connected to connecting rods, the lower end surfaces of the two connecting rods are fixedly connected to a second magnetic plate, the second magnetic plate is matched with the position of the first magnetic plate, and the adjacent surfaces of the second magnetic plate and the first magnetic plate are in a state of like repulsion.

[0016] Preferably, the outer surface of the sliding ring is symmetrically fixedly connected with support rods, a support block is fixedly connected between the end surfaces of the two support rods, and the support block is fixedly connected to the linkage rod.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When the pipeline is in the conveying state, the baffle can automatically move away to avoid it, and when the baffle is pushed out to avoid it, the block will automatically move into place to fix the position of the baffle. After the pipeline stops conveying, the floating plate will naturally fall and drive the second magnetic plate to fall to release the limit of the block. At this time, the baffle will automatically reset to put the pipeline in an anti-backflow state. When the pipeline is in the conveying state, it will not affect the conveying flow, effectively improving the transportation efficiency of the oil pipeline.

[0019] 2. When the baffle is pushed, the moving seat will follow the movement through the connection of the plug rod, and the moving seat will move along the slide rail through the connection of the slider. That is, through the coordinated setting of the slide rail and the slider, the movement of the baffle is supported and limited, which can ensure that the baffle always remains in a horizontal state to limit the flow, thereby improving the use effect of the baffle.

[0020] 3. When the first spring pushes the moving seat to rebound and reset, the moving seat will drive the base frame to contact the supporting plate to bear the force, and the supporting plate will transmit the impact force generated by the reset of the moving seat to the damper and the second spring position. The coordinated use of the damper and the second spring can play a role in buffering and shock absorption, thereby reducing the impact force generated when the moving seat rebounds and resets, reducing the loss of the device structure, and improving the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of a backflow prevention device for petroleum machinery according to the present invention;

[0022] Figure 2 A side view of a backflow prevention device for petroleum machinery according to the present invention;

[0023] Figure 3 This is a cross-sectional view of the pipeline structure of a backflow prevention device for petroleum machinery of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of a current limiting component of a backflow prevention device for petroleum machinery of the present invention;

[0025] Figure 5 This is a schematic diagram of a sealing structure of a backflow prevention device for petroleum machinery of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of a supporting plate of a backflow prevention device for petroleum machinery of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of a positioning assembly of a backflow prevention device for petroleum machinery of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of a release component of a backflow prevention device for petroleum machinery of the present invention;

[0029] Fig. 9 The present invention is a schematic diagram of the structure of a support assembly of a backflow prevention device for petroleum machinery.

[0030] In the figure:

[0031] 1. Bottom plate; 2. Fixed seat; 3. Pipeline; 4. First side pipe; 5. Second side pipe; 6. Current limiting assembly; 601. Slide rail; 602. Slider; 603. Moving seat; 604. Insert rod; 605. Baffle; 606. Sealing ring; 607. Cover; 608. First magnetic ring; 609. Second magnetic ring; 610. Limiting plate; 611. Bracket; 612. Positioning ring; 613. First spring; 614. Bottom frame; 615. Fixed frame; 616. Damper; 617. Second spring; 61 8. Support plate; 7. Positioning assembly; 701. Box body; 702. Third spring; 703. Insert block; 704. Card block; 705. Side plate; 706. First magnetic plate; 707. Fixed rod; 708. Fixed plate; 709. Card slot; 8. Release assembly; 801. Sliding rod; 802. Floating plate; 803. Top plate; 804. Linking plate; 805. Linking rod; 806. Second magnetic plate; 9. Support assembly; 901. Sliding ring; 902. Support rod; 903. Support block; 10. Top cover. DETAILED DESCRIPTION

[0032] 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 implementation regulations described 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.

[0033] See also Figure 1-Figure 9 The present invention provides a technical solution: a backflow prevention device for petroleum machinery, comprising: a bottom plate 1, a fixing seat 2 is fixedly connected to the top of the bottom plate 1, a pipeline 3 is fixedly connected to the top of the fixing seat 2, a first side pipe 4 and a second side pipe 5 are respectively fixedly connected to the outer surface of the pipeline 3, and a top cover 10 is fixedly connected to the top of the second side pipe 5; a flow limiting component 6, the flow limiting component 6 is used to prevent backflow inside the pipeline 3, the flow limiting component 6 is fixedly connected to the top of the bottom plate 1, the flow limiting component 6 includes two slide rails 601, a bracket 611 and a fixing frame 615, the outer surfaces of the two slide rails 601 are slidably connected to sliders 602, and the two sliders 602 A movable seat 603 is fixedly connected between the tops; a positioning component 7, which is used to position and fix the current limiting component 6, and the positioning component 7 is respectively fixedly connected to the movable seat 603 and the first side tube 4, and the positioning component 7 includes a box body 701 and two fixing rods 707; a releasing component 8, which is used to release the positioning component 7, and the releasing component 8 is slidably connected with the top cover 10, and the releasing component 8 includes a sliding rod 801; a supporting component 9, which is used to support and reinforce the releasing component 8, and the supporting component 9 is slidably connected to the outer surface of the pipeline 3, and the supporting component 9 includes a sliding ring 901.

[0034] like Figure 1-Figure 3 As shown, the first side pipe 4 and the second side pipe 5 are both connected to the pipeline 3, the oil transportation direction of the pipeline 3 is from left to right, the second side pipe 5 is located on the upper side of the first side pipe 4, the first side pipe 4 is arranged horizontally, and the second side pipe 5 is arranged longitudinally. The inside of the pipeline 3 is in a transportation state. Through the coordinated use of the pipeline 3, the first side pipe 4 and the second side pipe 5, the pipeline 3 is combined with the first side pipe 4 and the second side pipe 5. The pipeline 3 is a fixed elbow shape, and the first side pipe 4 and the second side pipe 5 extend from the outside of the pipeline 3 to the outside, which can cooperate with the pipeline 3 to play a flow control and backflow prevention function.

[0035] like Figure 3 and Figure 4 As shown, the outer surface of the movable seat 603 close to the first side tube 4 is fixedly connected with an insertion rod 604, and the end surface of the insertion rod 604 is fixedly connected with a baffle 605, the baffle 605 is located at the connection position between the pipeline 3 and the first side tube 4, the baffle 605 is located inside the first side tube 4, a sealing ring 606 is arranged on the outer surface of the baffle 605, the outer surface of the sealing ring 606 is in contact with the inner surface of the first side tube 4, the baffle 605 is located inside the pipeline 3 at the bottom bending position of the pipeline 3, that is, the use of the baffle 605 can prevent backflow, with the use of the sealing ring 606 outside the baffle 605, the sealing ring 606 is in contact with the inner wall position of the pipeline 3, which can play a role in strengthening the sealing, when the oil inside the pipeline 3 flows back from top to bottom, the baffle 605 blocks the inside of the pipeline 3 so that the oil cannot flow, and when the oil is normally transported from left to right, the baffle 605 can be pushed away, and the oil can be circulated and transported normally.

[0036] like Figure 4 and Figure 5 As shown, a sealing cover 607 is slidably connected through the outer surface of the insertion rod 604, and the sealing cover 607 is fixedly connected to the end surface of the first side tube 4. A limiting plate 610 is fixedly connected between the end surfaces of the two slide rails 601. The limiting plate 610 cooperates with the position of the slider 602. The kinetic energy generated by the flow of oil will push the baffle 605 to the position of the first side tube 4. When the baffle 605 is pushed, it will drive the moving seat 603 to follow the movement through the connection of the insertion rod 604. The moving seat 603 will move along the slide rail 601 through the connection of the slider 602. That is, the cooperation between the slide rail 601 and the slider 602 plays a role of supporting and limiting the movement of the baffle 605, which can ensure that the baffle 605 always remains in a horizontal state to limit the flow.

[0037] like Figure 4 and Figure 5As shown, a first magnetic ring 608 is fixedly connected to the outer surface of the cover 607 on one side close to the movable seat 603, and a second magnetic ring 609 is fixedly connected to the outer surface of the movable seat 603 on one side close to the cover 607. The positions of the first magnetic ring 608 and the second magnetic ring 609 are matched, and the adjacent surfaces of the first magnetic ring 608 and the second magnetic ring 609 are in a state of opposite attraction. After the movable seat 603 rebounds and resets, the position of the movable seat 603 can be adsorbed and limited by the coordinated use of the first magnetic ring 608 and the second magnetic ring 609.

[0038] like Figure 5 As shown, the positions of the bracket 611 and the movable seat 603 are matched, and the outer surfaces of the adjacent sides of the bracket 611 and the movable seat 603 are fixedly connected with a positioning ring 612, and a plurality of first springs 613 are evenly arranged between the two positioning rings 612. A plurality of first springs 613 are fixed between the bracket 611 and the movable seat 603 with the positioning ring 612 as support. When the first spring 613 is in a natural state, a certain pressure is applied to the movable seat 603 toward the first side tube 4, and the movable seat 603 can maintain the position of the baffle 605 through the connection of the plug rod 604. The baffle 605 is at the bottom bending position of the pipeline 3 inside the pipeline 3, that is, the use of the baffle 605 can play a role in preventing backflow.

[0039] like Figure 5 and Figure 6 As shown, the bottom of the movable seat 603 is fixedly connected to a base frame 614, and a plurality of dampers 616 are equidistantly fixedly connected to the outer surface of the fixed frame 615 close to the base frame 614. The outer surfaces of the plurality of dampers 616 are sleeved with second springs 617, and a supporting plate 618 is fixedly connected between the end surfaces of the plurality of dampers 616. The supporting plate 618 cooperates with the position of the base frame 614. When the first spring 613 pushes the movable seat 603 to rebound and reset, the movable seat 603 will drive the base frame 614 to contact the supporting plate 618 to receive force, and the supporting plate 618 will transmit the impact force generated by the reset of the movable seat 603 to the position of the damper 616 and the second spring 617. The coordinated use of the damper 616 and the second spring 617 can play a role in buffering and shock absorption, thereby reducing the impact force generated when the movable seat 603 rebounds and resets.

[0040] like Figure 7As shown, the bottom of the box body 701 is symmetrically fixedly connected with a third spring 702, an insert block 703 is fixedly connected between the end surfaces of the two third springs 702, the outer surface of the insert block 703 is plugged and connected with the inner surface of the box body 701, and a clamping block 704 is fixedly connected to the top of the insert block 703. A fixing plate 708 is fixedly connected between the upper end surfaces of the two fixing rods 707. A clamping groove 709 is opened on the top of the fixing plate 708. The position of the clamping block 704 matches the position of the clamping groove 709. The clamping block 704 is located on the inner side of the clamping groove 709. The outer surfaces of both sides of the insert block 703 are fixedly connected near the top. Plate 705, the top of the side plate 705 is fixedly connected with a first magnetic attraction plate 706. After the moving seat 603 reaches the maximum stroke, the moving seat 603 will drive the box body 701 on its top to move to the position of the card slot 709. When the box body 701 moves toward the card slot 709, the rebound force of multiple third springs 702 can be used to apply pressure upward to the plug block 703, so that the card block 704 and the bottom of the fixed plate 708 are in a tight state. When the box body 701 moves to the corresponding position of the card slot 709, the card block 704 will pop out and be stuck in the card slot 709.

[0041] like Figure 8 As shown, the lower end surface of the sliding rod 801 is fixedly connected with a floating plate 802, the floating plate 802 is located inside the pipeline 3, the cross section of the floating plate 802 is smaller than the cross section of the inner wall of the pipeline 3, the upper end surface of the sliding rod 801 is fixedly connected with a top plate 803, the top of the top plate 803 is symmetrically fixedly connected with a linkage plate 804, the bottoms of the two linkage plates 804 are fixedly connected with linkage rods 805, the lower end surfaces of the two linkage rods 805 are fixedly connected with a second magnetic plate 806, the second magnetic plate 806 is matched with the first magnetic plate 706, and the adjacent surfaces of the second magnetic plate 806 and the first magnetic plate 706 are of the same polarity In the repulsive state, after the pipeline 3 stops transporting oil, the floating plate 802 will fall naturally. At this time, the floating plate 802 can drive the second magnetic plate 806 to fall naturally. When falling, the second magnetic plate 806 generates a repulsive force on the first magnetic plate 706, and can push the plug block 703 to move downward through the connection of the side plate 705. At this time, the plug block 703 drives the clamping block 704 to move downward. After the clamping block 704 is subjected to the downward impact force, it disengages from the clamping slot 709, that is, the clamping block 704 is separated from the limiting fixation of the movable seat 603. At this time, the rebound force of the first spring 613 can be used to push the baffle 605 to reset.

[0042] like Fig. 9 As shown, the outer surface of the sliding ring 901 is symmetrically fixedly connected with support rods 902, and a support block 903 is fixedly connected between the end faces of the two support rods 902. The support block 903 is fixedly connected to the connecting rod 805. Through the coordinated setting of the sliding ring 901, the support rod 902 and the support block 903, the movement of the connecting rod 805 can be supported and limited.

[0043] The use method and working principle of the device: When the pipeline 3 is not in use, the bracket 611 is used to provide support for the movable seat 603. Since a plurality of first springs 613 are fixed between the bracket 611 and the movable seat 603 by the positioning ring 612 as support, when the first spring 613 is in a natural state, a certain pressure is applied to the movable seat 603 in the direction of the first side pipe 4, and the movable seat 603 can maintain the position of the baffle 605 through the connection of the plug rod 604. The baffle 605 is located at the bottom bending position of the pipeline 3 inside the pipeline 3, that is, the use of the baffle 605 can play a role in preventing backflow. , with the use of the sealing ring 606 outside the baffle 605, the sealing ring 606 fits the inner wall position of the pipeline 3, which can play a role in strengthening the seal. When the oil in the pipeline 3 flows back from top to bottom, the baffle 605 blocks the inside of the pipeline 3 so that the oil cannot flow. When the oil is normally transported from left to right, the baffle 605 can be pushed away, and the oil can be circulated and transported normally. When the oil machinery is used in conjunction with the pipeline 3 to pump the oil, the pipeline 3 is combined with the first side pipe 4 and the second side pipe 5 through the cooperation of the pipeline 3, the pipeline 3 is a fixed elbow shape, and the first side pipe 4 and the second side pipe 5 are used together. One side pipe 4 and the second side pipe 5 extend from the outside of pipeline 3 to the outside, and can cooperate with pipeline 3 to play the function of flow control and backflow prevention. When oil is pumped in pipeline 3, oil is transported from the left opening of pipeline 3 to the right opening. Oil will first be transported through the lower transverse pipeline of pipeline 3. When oil enters the transverse pipeline of pipeline 3, the use of flow limiting component 6 can be used to drive baffle 605 to avoid when pipeline 3 is used. After baffle 605 avoids, pipeline 3 is in a connected state, and oil can be pumped normally. The oil inside pipeline 3 flows from left to right. When the oil is transported on the right side, the kinetic energy generated by the flow of oil will push the baffle 605 to the position of the first side pipe 4. When the baffle 605 is pushed, the connection with the plug rod 604 will drive the moving seat 603 to move with it. The moving seat 603 will move along the slide rail 601 through the connection with the slider 602. That is, the cooperation between the slide rail 601 and the slider 602 plays a supporting and limiting role for the movement of the baffle 605, which can ensure that the baffle 605 always maintains a horizontal state for flow limiting, thereby improving the use effect of the baffle 605. After being pushed, the baffle 605 will move to the connection position between the pipeline 3 and the first side pipe 4. At this time, Figure 3As shown in the conveying state diagram, the baffle 605 avoids to the position of the first side pipe 4, so that the pipeline 3 is in a connected state as a whole, and the oil can be normally transported inside the pipeline 3. Because the baffle 605 completely leaves the pipeline 3 when avoiding, there is no obstruction to the conveying flow inside the pipeline 3, avoiding affecting the conveying flow of the oil. When the movable seat 603 is pushed outward by the baffle 605, when the baffle 605 moves into place, the movable seat 603 will move to the position of the limit plate 610. The moving stroke of the movable seat 603 is limited by the setting of the limit plate 610. After the movable seat 603 reaches the maximum stroke, the movable seat 603 will drive the box body 701 on its top to move to the position of the slot 709. When the box body 701 moves to the slot When the box body 701 moves in the direction of 709, the rebound force of multiple third springs 702 can be used to apply pressure to the plug block 703 upward, so that the block 704 and the bottom of the fixed plate 708 are in a tight state. When the box body 701 moves to the corresponding position of the slot 709, the block 704 will pop out and be stuck in the slot 709. When the block 704 is stuck in the slot 709, the block 704 can limit and fix the position of the movable seat 603. After the position of the movable seat 603 is limited and fixed, the position of the baffle 605 can be fixed. At this time, the use state of the baffle 605 changes. Compared with the traditional anti-backflow method, the position of the baffle 605 always maintains an avoidance position under the impact of the oil delivery flow, so that the pipeline 3 is in a connected state. However, at this time, under the action of the rebound force generated by the first spring 613, the baffle 605 will always apply pressure in the direction of the pipeline 3. In this way, when the oil delivery flow rate is small, the baffle 605 will generate a reverse thrust in the delivery direction of the oil, causing great interference to the delivery of the oil, affecting the normal use of the pipeline 3. In the existing anti-backflow method, when the pipeline 3 is in a delivery state, the baffle 605 is pushed to the outermost side by the initial flow rate and can be automatically positioned by using the clamping block 704. The baffle 605 is in a fixed state inside the pipeline 3. Even if the delivery flow rate inside the pipeline 3 changes, the baffle 605 will not cause any impact. At the same time, with the use of the release component 8, when the oil in the pipeline 3 continues to be transported upward through the first side pipe 4, The floating plate 802 will be lifted up and float inside the second side tube 5, that is, when the pipeline 3 is in the conveying state, the floating plate 802 will naturally float inside the second side tube 5 for avoidance. At this time, the floating plate 802 is connected through the top plate 803, the linkage plate 804 and the linkage rod 805, and the second magnetic plate 806 is located at a certain distance above the first magnetic plate 706. After the pipeline 3 stops conveying oil, the floating plate 802 will fall naturally. At this time, the floating plate 802 can drive the second magnetic plate 806 to fall naturally. Through the coordinated arrangement of the sliding ring 901, the support rod 902 and the support block 903, the movement of the linkage rod 805 can be supported and limited. When falling, the second magnetic plate 806 generates a repulsive force on the first magnetic plate 706.The plug block 703 can be pushed downward by the connection of the side plate 705. At this time, the plug block 703 drives the clamping block 704 to move downward. After the clamping block 704 is subjected to the downward impact force, it disengages from the clamping groove 709, that is, the clamping block 704 is separated from the limiting fixation of the movable seat 603. At this time, the rebound force of the first spring 613 can be used to push the baffle plate 605 to reset, so that the pipeline 3 returns to the initial anti-backflow state. When the first spring 613 pushes the movable seat 603 to rebound and reset, the movable seat 603 will drive the base frame 614 to contact the supporting plate 618 to receive the force. The supporting plate 618 will transmit the impact force generated by the reset of the movable seat 603 to the position of the damper 616 and the second spring 617. The coordinated use of the damper 616 and the second spring 617 can play a buffering and shock absorption role. The effect of the above can reduce the impact force generated when the movable seat 603 rebounds and resets, reduce the loss of the device structure, and improve the service life of the device. That is, through the coordinated use of the current limiting component 6, the positioning component 7 and the release component 8, when the pipeline 3 is in the conveying state, the baffle 605 can automatically move away to avoid, and when the baffle 605 is pushed out to avoid, the block 704 will automatically get in place to fix the position of the baffle 605. After the pipeline 3 stops conveying, the floating plate 802 will naturally fall and drive the second magnetic plate 806 to fall to release the limit of the block 704. At this time, the baffle 605 will automatically reset to put the pipeline 3 in the anti-backflow state. When the pipeline 3 is in the conveying state, it will not affect the conveying flow, which effectively improves the conveying efficiency of the oil pipeline.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A backflow prevention device for petroleum machinery, characterized in that: include: A bottom plate (1), the top of the bottom plate (1) being fixedly connected to a fixing seat (2), the top of the fixing seat (2) being fixedly connected to a pipeline (3), the outer surface of the pipeline (3) being respectively fixedly connected to a first side tube (4) and a second side tube (5), the top of the second side tube (5) being fixedly connected to a top cover (10); A flow limiting component (6), the flow limiting component (6) being used to prevent backflow inside the pipeline (3), the flow limiting component (6) being fixedly connected to the top of the base plate (1), the flow limiting component (6) comprising two slide rails (601), a bracket (611) and a fixing bracket (615), the outer surfaces of the two slide rails (601) being slidably connected to sliders (602), and a moving seat (603) being fixedly connected between the tops of the two sliders (602); A positioning assembly (7), the positioning assembly (7) being used to position and fix the current limiting assembly (6), the positioning assembly (7) being fixedly connected to the movable seat (603) and the first side tube (4) respectively, the positioning assembly (7) comprising a box body (701) and two fixing rods (707); A release component (8), the release component (8) being used to release the positioning component (7), the release component (8) being slidably connected to the top cover (10), and the release component (8) comprising a sliding rod (801); A support assembly (9), the support assembly (9) being used to support and reinforce the release assembly (8), the support assembly (9) being slidably connected to the outer surface of the pipeline (3), the support assembly (9) comprising a sliding ring (901); The outer surface of the movable seat (603) close to the first side tube (4) is fixedly connected to an insertion rod (604), and the end surface of the insertion rod (604) is fixedly connected to a baffle (605), the baffle (605) is located at the connection position between the pipeline (3) and the first side tube (4), the baffle (605) is located inside the first side tube (4), and a sealing ring (606) is provided on the outer surface of the baffle (605), and the outer surface of the sealing ring (606) is in contact with the inner surface of the first side tube (4); A third spring (702) is symmetrically fixedly connected to the bottom of the box body (701); an insert block (703) is fixedly connected between the end surfaces of the two third springs (702); the outer surface of the insert block (703) is plugged into the inner surface of the box body (701); a clamping block (704) is fixedly connected to the top of the insert block (703); a fixing plate (708) is fixedly connected between the upper end surfaces of the two fixing rods (707); a clamping groove (709) is provided on the top of the fixing plate (708); the clamping block (704) matches the position of the clamping groove (709); the clamping block (704) is located on the inner side of the clamping groove (709); side plates (705) are fixedly connected to the outer surfaces of both sides of the insert block (703) near the top; and a first magnetic attraction plate (706) is fixedly connected to the top of the side plate (705); The lower end surface of the sliding rod (801) is fixedly connected to a floating plate (802), the floating plate (802) is located inside the pipeline (3), the cross section of the floating plate (802) is smaller than the cross section of the inner wall of the pipeline (3), the upper end surface of the sliding rod (801) is fixedly connected to a top plate (803), the top of the top plate (803) is symmetrically fixedly connected to a linkage plate (804), the bottoms of the two linkage plates (804) are fixedly connected to linkage rods (805), the lower end surfaces of the two linkage rods (805) are fixedly connected to a second magnetic plate (806), the position of the second magnetic plate (806) matches that of the first magnetic plate (706), and the adjacent surfaces of the second magnetic plate (806) and the first magnetic plate (706) are in a state of repulsion of the same polarity; When the inside of the pipeline (3) is in a conveying state, the baffle (605) can automatically move away to avoid, and when the baffle (605) is pushed out to avoid, the clamping block (704) will automatically move into place to clamp and fix the position of the baffle (605), and after the pipeline (3) stops conveying, the floating plate (802) naturally falls to drive the second magnetic plate (806) to fall and release the limit of the clamping block (704), at which time the baffle (605) will automatically reset to put the pipeline (3) in an anti-backflow state, and will not affect the conveying flow when the pipeline (3) is in a conveying state.

2. The backflow prevention device for petroleum machinery according to claim 1, characterized in that: The first side pipe (4) and the second side pipe (5) are both arranged in communication with the pipeline (3); the oil conveying direction of the pipeline (3) is from left to right; the second side pipe (5) is located above the first side pipe (4); the first side pipe (4) is arranged horizontally; the second side pipe (5) is arranged longitudinally; and the interior of the pipeline (3) is in a conveying state.

3. The backflow prevention device for petroleum machinery according to claim 1, characterized in that: A cover (607) is slidably connected through the outer surface of the insertion rod (604), and the cover (607) is fixedly connected to the end surface of the first side tube (4). A limit plate (610) is fixedly connected between the end surfaces of the two slide rails (601), and the limit plate (610) is matched with the position of the slider (602).

4. The backflow prevention device for petroleum machinery according to claim 3, characterized in that: A first magnetic attraction ring (608) is fixedly connected to the outer surface of the side of the cover (607) close to the movable seat (603), and a second magnetic attraction ring (609) is fixedly connected to the outer surface of the side of the movable seat (603) close to the cover (607). The positions of the first magnetic attraction ring (608) and the second magnetic attraction ring (609) are matched, and the adjacent surfaces of the first magnetic attraction ring (608) and the second magnetic attraction ring (609) are in an oppositely attracted state.

5. The backflow prevention device for petroleum machinery according to claim 1, characterized in that: The bracket (611) and the movable seat (603) are matched in position, and the outer surfaces of the adjacent sides of the bracket (611) and the movable seat (603) are fixedly connected with positioning rings (612), and a plurality of first springs (613) are evenly arranged between the two positioning rings (612).

6. The backflow prevention device for petroleum machinery according to claim 1, characterized in that: The bottom of the movable seat (603) is fixedly connected to a base frame (614); a plurality of dampers (616) are fixedly connected at equal intervals to the outer surface of a side of the fixed frame (615) close to the base frame (614); a second spring (617) is sleeved on the outer surfaces of the plurality of dampers (616); a supporting plate (618) is fixedly connected between the end surfaces of the plurality of dampers (616); and the supporting plate (618) matches the position of the base frame (614).

7. The backflow prevention device for petroleum machinery according to claim 1, characterized in that: The outer surface of the sliding ring (901) is symmetrically fixedly connected to a support rod (902), a support block (903) is fixedly connected between the end surfaces of the two support rods (902), and the support block (903) is fixedly connected to the linkage rod (805).

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