Flat valve for petroleum pipeline

Abstract

The utility model discloses a flat valve for a petroleum pipeline, which relates to the field of flat valves, and adopts the technical scheme that the flat valve comprises a flat valve main body, an expansion pipe is mounted at the liquid inlet end of the flat valve main body, the expansion pipe is rotatably connected with a branch valve rod through a sealing structure, and the flat valve for the petroleum pipeline further comprises a turning component, the valve plate is arranged at the bottom end of the branch valve rod so as to change the direction of flowing petroleum, and the petroleum is prevented from directly impacting the valve plate; the state fixing assembly is arranged on the expansion pipe and the branch valve rod so as to fix the opening state and the closing state of the direction changing component, and the effect is that when petroleum passes through the direction changing component, the direction can be changed, and the situation that the petroleum directly collides with the valve plate, and consequently the valve plate is damaged is avoided.

Description

Technical Field

[0001] The utility model relates to the field of flat plate valves, and more specifically, to a flat plate valve for petroleum pipelines. Background Art

[0002] The flat plate valve is a key component in the oil transportation pipeline system, usually made of high-strength, wear-resistant and corrosion-resistant materials. Its valve plate moves parallel to the fluid flow direction, and the valve is opened and closed by the control of the valve stem. The flat plate valve has good sealing performance and can effectively withstand the high pressure and high temperature environment in the oil pipeline, reducing the risk of leakage. It is relatively simple in structure, easy to operate, and has relatively low maintenance costs. It can adapt to complex working conditions in the oil pipeline, such as fluids containing impurities, pressure fluctuations, etc., to ensure the safety and stability of oil transportation. At the same time, the design and manufacture of the flat plate valve usually follow strict industry standards and specifications to ensure its reliability and durability.

[0003] When the valve plate of the flat valve is lifted and lowered, it is mainly subjected to the axial pressure of the medium, and its force is relatively concentrated and in a single direction. The valve plates of other valves (such as butterfly valves) are not only subjected to the pressure of the medium during rotation, but also to complex stresses such as torque and bending moment generated by rotation. Therefore, the valve plate of the flat valve does not need to be thick enough to resist multiple complex stresses like the valve plate of the butterfly valve, which leads to the fact that most existing flat valves are designed to be thinner in order to reduce the weight of the valve plate, thereby reducing costs and facilitating installation and maintenance. However, when the thinner valve plate encounters a situation where the oil circulation rate is too fast (the flat valve is in a closed state), it is still easy to deform, wear or even break due to its continuous force (because it is in a closed state, it will be repeatedly hit), thereby shortening the service life of the valve.

[0004] Therefore, in order to solve the above technical problems, the present application proposes a flat plate valve for oil pipelines. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a flat plate valve for a petroleum pipeline.

[0006] To achieve the above object, the utility model provides the following technical solution: a flat plate valve for oil pipelines, comprising a flat plate valve body, an expansion tube is installed on the liquid inlet end of the flat plate valve body, and the expansion tube is rotatably connected to a valve stem through a sealing structure, and the flat plate valve for oil pipelines also includes:

[0007] A direction-changing component is provided at the bottom end of the valve stem to change the direction of the flowing oil to prevent the oil from directly hitting the valve plate;

[0008] State fixing component: It is arranged on the expansion tube and the valve stem to fix the open state and the closed state of the direction-changing component respectively.

[0009] Preferably, the expansion tube is detachably connected to the flat valve body via a flange, and it is possible to choose whether to install the expansion tube according to actual needs.

[0010] Preferably, the direction-changing component comprises a circular plate arranged inside the expansion tube and fixed to the bottom end of the valve stem, and a plurality of L-shaped pipes are embedded and fixed inside the circular plate, and the delivery direction of the oil is changed through the L-shaped pipes.

[0011] Preferably, the state fixing component includes a top plate fixed to the head of the valve stem, and a fixing platform fixed to the outer wall of the expansion tube through a connecting rod, the top of the fixing platform is provided with two mutually perpendicular grooves, and a pressing component for driving the protrusion to move downward is installed on the top plate.

[0012] Preferably, the pressing assembly comprises a screw rod threadably connected to the top plate, and a protrusion is rotatably connected to the bottom end of the screw rod.

[0013] Preferably, a vertical rod is fixedly connected to the top end of the protrusion, and a through slot for the vertical rod to pass through is provided inside the top plate to maintain the linear movement of the protrusion.

[0014] Preferably, a handle is fixedly connected to the head of the screw rod for facilitating its rotation, so that a worker can easily rotate the screw rod.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. When the oil circulation rate is too fast, the utility model adjusts the direction-changing component to the open state through the valve stem, and fixes the state through the state fixing component. In this way, when the oil passes through the direction-changing component, the direction will be changed to prevent the oil from directly hitting the valve plate and causing damage to the valve plate, thereby solving the problem that the thinner valve plate in the background technology is still very easy to deform, wear or even break when the oil circulation rate is too fast, thereby shortening the service life of the valve;

[0017] 2. The state fixing component of the utility model is easy to operate, and the state can be fixed or released by rotating the handle forward and reverse;

[0018] 3. The expansion tube of the utility model is detachably connected to the flat valve body through a flange, so that when the components on the expansion tube are damaged, they can be replaced, and it is also possible to choose whether to install the expansion tube according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the top specific structure of the utility model;

[0022] Figure 3 Practical Figure 1 A local structure enlarged view;

[0023] Figure 4 It is a schematic diagram of the specific structure of the surface of the direction-changing component (the surface facing the valve plate of the flat valve) in the utility model;

[0024] Figure 5 It is a schematic diagram of the specific structure of the back of the direction-changing component of the utility model.

[0025] In the figure: 1. Flat valve body; 2. Expansion tube; 3. Branch valve stem; 4. Direction-changing component; 41. Circular plate; 42. L-shaped pipe; 5. State fixing component; 51. Top plate; 52. Connecting rod; 53. Fixing platform; 54. Groove; 55. Bump; 56. Pressing component; 561. Screw; 562. Vertical rod; 563. Through groove; 564. Handle. DETAILED DESCRIPTION

[0026] like Figure 1-5 As shown, the utility model provides a flat plate valve for oil pipelines, including a flat plate valve body 1, an expansion tube 2 is installed on the liquid inlet end of the flat plate valve body 1, and the expansion tube 2 is rotatably connected to a sub-valve stem 3 through a sealing structure (the sealing structure is a sealing connection between a normal valve stem and a valve body, which is the current existing technology), and the flat plate valve for oil pipelines also includes:

[0027] A direction-changing component 4 is arranged at the bottom end of the valve stem 3 to change the direction of the flowing oil to prevent the oil from directly hitting the valve plate;

[0028] State fixing component 5: arranged on the expansion tube 2 and the valve stem 3 to fix the open state and the closed state of the direction-changing component 4 respectively.

[0029] When in use, the expansion tube 2 is installed on the flat valve body 1, and then the flat valve body 1 and the expansion tube 2 are connected to the oil delivery pipeline. If the oil flow rate is too fast, the changing component 4 is adjusted to the open state through the valve stem, and the state is fixed by the state fixing component 5. In this way, when the oil passes through the changing component 4, the direction will be changed to prevent the oil from directly hitting the valve plate and causing damage to the valve plate. When the oil is transported normally, the valve stem can be rotated to adjust the changing component 4 to the closed state, and the state is fixed by the state fixing component 5. In this way, the obstruction of the changing component 4 to the oil flow can be reduced.

[0030] The direction-changing component 4 includes a circular plate 41 which is arranged inside the expansion tube 2 and fixed to the bottom end of the sub-valve stem 3, and a plurality of L-shaped pipes 42 are embedded and fixed inside the circular plate 41. The state fixing component 5 includes a top plate 51 fixed to the head of the sub-valve stem 3, and a fixing platform 53 fixed to the outer wall of the expansion tube 2 through a connecting rod 52. Two grooves 54 perpendicular to each other are provided at the top of the fixing platform 53. A pressing component 56 for driving the protrusion 55 to move downward is installed on the top plate 51. The pressing component 56 includes a screw 561 threadedly connected to the top plate 51, the bottom end of the screw 561 is rotatably connected to the protrusion 55, and the top end of the protrusion 55 is fixedly connected to a vertical rod 562. A through groove 563 for the vertical rod 562 to pass through is provided inside the top plate 51, and a handle 564 for facilitating its rotation is fixedly connected to the head of the screw 561.

[0031] That is, the circular plate 41 is rotated by the valve stem 3 to a state that the circular plate 41 is flush with or perpendicular to the oil delivery direction. When it is parallel (i.e., open), the circular plate 41 is blocked by the oil, so that the oil passes through the circular plate 41 through the L-shaped tube, and is changed in direction by the L-shaped tube, thereby preventing the oil from directly hitting the flat valve plate and causing damage to the valve plate. When it is vertical, the cross section of the circular plate 41 is opposite to the oil delivery direction to reduce the obstruction to the oil delivery. When the direction-changing component 2 is in the above two states, the protrusion 55 is opposite to a groove 54 respectively, and the screw 561 is rotated clockwise by the handle 564, and the screw 561 The protrusion 55 is driven to move downward, and the protrusion 55 drives the vertical rod 562 to move downward, and the vertical rod 562 moves linearly downward along the through groove 563 (it should be noted that the cross section of the vertical rod 562 is the same as the cross section of the through groove 563) to maintain the linear movement of the protrusion 55, so that the protrusion 55 is inserted downward into the corresponding groove 54, and the angle of the valve stem 3 is fixed, thereby fixing the state of the changing component 4. Conversely, rotating the handle 564 in the opposite direction drives the screw rod 561 to rotate counterclockwise, and finally drives the protrusion 55 to move upward and be pulled out of the groove 54, thereby releasing the fixation of the state of the changing component 2, and the operation is simple.

[0032] Furthermore, the expansion tube 2 is detachably connected to the flat valve body 1 through a flange, so that when a component on the expansion tube 2 is damaged, it can be replaced, and it can also be selected whether to install the expansion tube 2 according to actual needs.

[0033] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A flat plate valve for a petroleum pipeline, comprising a flat plate valve body (1), characterized in that: An expansion tube (2) is installed on the liquid inlet end of the flat valve body (1), and the expansion tube (2) is rotatably connected to a valve stem (3) via a sealing structure. The flat valve for oil pipelines also includes: A direction-changing component (4) is arranged at the bottom end of the valve stem (3) to change the direction of the flowing oil and prevent the oil from directly hitting the valve plate; State fixing component (5): arranged on the expansion tube (2) and the valve stem (3) to respectively fix the open state and the closed state of the direction-changing component (4).

2. A flat plate valve for oil pipeline according to claim 1, characterized in that: The expansion pipe (2) is detachably connected to the flat valve body (1) via a flange.

3. The flat plate valve for oil pipeline according to claim 1, characterized in that: The direction-changing component (4) comprises a circular plate (41) arranged inside the expansion tube (2) and fixed to the bottom end of the valve stem (3), and a plurality of L-shaped pipes (42) are embedded and fixed inside the circular plate (41).

4. The flat plate valve for oil pipeline according to claim 1, characterized in that: The state fixing component (5) comprises a top plate (51) fixed to the head of the sub-valve stem (3), and a fixing platform (53) fixed to the outer wall of the expansion tube (2) via a connecting rod (52), the top of the fixing platform (53) being provided with two mutually perpendicular grooves (54), and a pressing component (56) for driving the protrusion (55) to move downward is installed on the top plate (51).

5. A flat plate valve for oil pipeline according to claim 4, characterized in that: The pressing assembly (56) comprises a screw rod (561) threadedly connected to the top plate (51), and a protrusion (55) is rotatably connected to the bottom end of the screw rod (561).

6. A flat plate valve for oil pipeline according to claim 4, characterized in that: A vertical rod (562) is fixedly connected to the top end of the protrusion (55), and a through slot (563) for the vertical rod (562) to pass through is provided inside the top plate (51).

7. The flat plate valve for oil pipeline according to claim 5, characterized in that: A handle (564) is fixedly connected to the head of the screw rod (561) for facilitating its rotation.

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