Gate valve with low maintenance frequency

Abstract

The utility model discloses a gate valve with low maintenance frequency, which comprises a valve body, a valve cover is arranged on the valve body, a gate plate in the valve cover is fixedly provided with a valve rod which penetrates through the valve cover and then extends upwards, the valve cover is connected with a mounting seat through two first support arms which are distributed front and back, a driving nut is rotatably connected in the mounting seat, and the driving nut is fixedly connected with the valve cover. Threads used for being connected with the driving nut are machined on the valve rod, and a hand wheel is installed on the driving nut. When a worker shifts the hand wheel to drive the valve rod to move up and down, oil can automatically act on the thread of the valve rod, and the automatic maintenance function is achieved; the corrugated pipe covering the valve rod is mounted on the hand wheel and can stretch out and draw back, so that the valve rod can be protected on the premise that a worker judges the position of the gate plate by observing the extending length of the valve rod without interfering, and oil on the valve rod is prevented from losing efficacy too fast.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a gate valve with low maintenance frequency. Background Art

[0002] A gate valve is a shutoff valve whose internal disc, driven by the valve stem, moves linearly up and down along the valve seat, shutting off or connecting the medium in a pipeline. It offers advantages such as low fluid resistance, effortless opening and closing, unrestricted medium flow direction, a short length, and excellent sealing performance.

[0003] There is a thread processed in the valve stem of the valve gate. The staff usually controls the lifting and lowering of the threaded valve stem by turning the handwheel. However, the valve stem is usually exposed to the outside, so that the staff can observe the exposed length of the valve stem to judge the position of the gate. The exposed valve stem generally requires frequent maintenance and lubrication. The current maintenance method is generally manual oiling by the staff, which is cumbersome and needs to be improved. Utility Model Content

[0004] In view of the deficiencies of the prior art, the present invention provides a gate valve with low maintenance frequency to solve the problems mentioned in the above background technology.

[0005] The utility model provides the following technical solutions: a gate valve with low maintenance frequency, comprising a valve body, a valve cover being mounted on the valve body, a valve stem extending upward through the valve cover and fixedly provided on a gate plate in the valve cover, the valve cover being connected to a mounting seat via two No. 1 support arms distributed front and back, a drive nut being rotatably connected in the mounting seat, a thread for connecting with the drive nut being processed on the valve stem, and a handwheel being mounted on the drive nut; it also comprises a reinforcing plate located between the No. 1 support arms, the reinforcing plate being sleeved on the outside of the valve stem, and the reinforcing plate being connected to the valve cover via two No. 2 support arms distributed left and right; a lubrication assembly being arranged on the reinforcing plate, the lubrication assembly comprising an oil storage box mounted on the reinforcing plate, an oil supply member being mounted on the oil storage box for acting on the thread in the valve stem, and an oil outlet mechanism for pushing the oil in the oil storage cavity in the oil storage box into the oil supply member.

[0006] Preferably, the oil supply member is an oil outlet ring fixed on the oil storage box, extending transversely and sleeved outside the oil storage box, with the axis of the oil outlet ring as the center, and oil outlets are provided at equal angles on the inner curved surface of the oil outlet ring.

[0007] Preferably, the oil outlet mechanism includes an oil pump chamber provided in the oil storage box, a piston being slidably connected to the oil pump chamber left and right, a liquid inlet hole connected to the oil storage chamber, and a liquid outlet hole connected to the oil feeding member, a one-way valve being provided in each of the liquid inlet hole and the liquid outlet hole, a piston rod on the piston extending laterally to the outside of the oil storage box, and a spring plate being provided at the end of the piston rod, the spring plate being connected to the side of the oil storage box via a spring, and an abutment head being provided on the side of the spring plate away from the spring;

[0008] The reinforcing plate is provided with a rotating shaft and a connecting shaft, the rotating shaft and the connecting shaft are connected by a synchronous belt, the rotating shaft is provided with a pressure wheel attached to the valve stem, the connecting shaft is provided with an eccentric wheel, and the abutment joint abuts against the outer curved surface of the eccentric wheel.

[0009] Preferably, a rubber plate is installed at the lower edge of the inner curved surface of the oil outlet ring, and the inner edge of the rubber plate is attached to the thread on the valve stem.

[0010] Preferably, the hand wheel is provided with a bellows, and the bellows is sleeved outside the valve stem.

[0011] Preferably, a fixed disk is mounted on the bottom wall of the bellows, and a rotating disk is rotatably connected inside the fixed disk.

[0012] Preferably, an oil filling hole is provided in the oil storage box.

[0013] The utility model provides a gate valve with low maintenance frequency, which has the following beneficial effects:

[0014] When the staff turns the hand wheel to drive the valve stem to move up and down, the utility model can automatically apply oil to the thread of the valve stem to achieve the function of automatic maintenance;

[0015] The hand wheel in the utility model is equipped with a bellows covering the valve stem, and the bellows can be extended and retracted to protect the valve stem without interfering with the staff's judgment of the gate position by observing the extended length of the valve stem, thereby preventing the oil on the valve stem from becoming ineffective too quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the appearance of the utility model;

[0017] Figure 2 yes Figure 1 A magnified schematic diagram of point A in the middle;

[0018] Figure 3 It is the main view of the utility model;

[0019] Figure 4 yes Figure 3 Schematic diagram of the structure inside the oil outlet ring;

[0020] Figure 5 yes Figure 3 Schematic diagram of the structure of the middle BB;

[0021] Figure 6 yes Figure 5 Enlarged schematic diagram of the middle eccentric wheel.

[0022] In the picture:

[0023] 11. Valve body; 12. Valve cover; 13. Valve stem; 14. Support arm No. 1; 15. Mounting seat; 16. Handwheel; 17. Reinforcement plate; 18. Support arm No. 2; 19. Oil storage box; 20. Oil outlet ring; 21. Rotating shaft; 22. Pressure roller; 23. Eccentric wheel; 24. Pump oil chamber; 25. Piston; 26. Spring plate; 27. Rubber plate; 28. Bellows; 29. Turntable; 30. Limit plate; 31. Connecting shaft; 32. Synchronous belt; 91. Liquid inlet hole; 92. Hose. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0027] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] Reference Figures 1-6 According to an embodiment of a gate valve with low maintenance frequency of the present invention, it includes a valve body 11, a valve cover 12 is installed on the valve body 11, and a valve stem 13 is fixed on the gate plate inside the valve cover 12 and extends upward after passing through the valve cover 12. The valve cover 12 is connected to a mounting seat 15 through two No. 1 support arms 14 distributed front and back. A drive nut is rotatably connected to the mounting seat 15. The valve stem 13 is processed with a thread for connecting with the drive nut, and a handwheel 16 is installed on the drive nut. The staff can rotate the handwheel 16 to control the valve stem 13 and the lifting and lowering of the gate. During the rising process of the gate, the valve body 11 is no longer closed and the fluid can pass through.

[0029] In addition, in order to ensure the stable connection of the valve stem 13, a reinforcement plate 17 is also included between the No. 1 support arms 14. The reinforcement plate 17 is sleeved on the outside of the valve stem 13 so that the valve stem 13 can slide up and down and be connected to the reinforcement plate 17, and the reinforcement plate 17 is connected to the valve cover 12 through two No. 2 support arms 18 distributed on the left and right. In this embodiment, one No. 2 support arm 18 is hinged to the valve cover 12 for easy installation.

[0030] In addition, in order to realize automatic lubrication of the valve stem 13, a lubrication assembly is provided on the reinforcement plate 17, and the lubrication assembly includes an oil storage box 19 mounted on the reinforcement plate 17, an oil filling hole is provided in the oil storage box 19, and an oil supply part acting on the thread in the valve stem 13 is installed on the oil storage box 19, and also includes an oil outlet mechanism for pushing the oil in the oil storage cavity in the oil storage box 19 to the oil supply part.

[0031] In order to enable the oil supply component to act evenly on the surface of the valve stem 13, the oil supply component is an oil outlet ring 20 fixed on the oil storage box 19, extending horizontally and sleeved on the outside of the oil storage box 19. With the axis of the oil outlet ring 20 as the center, oil outlets are provided at equal angles on the inner curved surface of the oil outlet ring 20.

[0032] In order to ensure that the valve stem 13 can be automatically lubricated when it is raised or lowered, in this embodiment, the oil outlet mechanism includes an oil pump chamber 24 provided in the oil storage box 19, and a piston 25 is connected to the oil pump chamber 24 for sliding left and right. The oil pump chamber 24 is also provided with a liquid inlet hole 91 connected to the oil storage chamber, and a liquid outlet hole connected to the oil supply member. The liquid outlet hole is connected to the oil supply member through a hose 92. A one-way valve is respectively provided in the liquid inlet hole and the liquid outlet hole. The piston rod on the piston 25 extends laterally to the outside of the oil storage box 19, and a spring plate 26 is installed at the end of the piston rod. The spring plate 26 is connected to the side of the oil storage box 19 through a spring, and an abutment head is also installed on the side of the spring plate 26 away from the spring.

[0033] The reinforcing plate 17 is provided with a rotating shaft 21 and a connecting shaft 31, and the rotating shaft 21 and the connecting shaft 31 are connected by a synchronous belt 32. The rotating shaft 21 is provided with a pressure wheel 22 attached to the valve stem 13, and the connecting shaft 31 is provided with an eccentric wheel 23, and the abutment joint abuts against the outer curved surface of the eccentric wheel 23.

[0034] During the process of the controlled rotation of the handwheel 16 and the lifting and lowering of the valve stem 13, the part of the valve stem 13 located on the lower side of the thread will drive the pressure wheel 22 to rotate. At this time, the pressure wheel 22 drives the eccentric wheel 23 to rotate through the rotating shaft 21, the synchronous belt 32 and the connecting shaft 31, and cooperates with the spring to make the abutment head, the spring plate 26 and the piston 25 move left and right periodically. When the piston 25 moves left and right, the oil in the oil storage chamber will be pumped into the oil outlet ring 20, and attached to the thread in the valve stem 13 through the oil outlet for lubrication.

[0035] In the second embodiment of the oil outlet ring 20, in order to prevent the oil from dripping at the lower edge of the inner curved surface of the oil outlet ring 20 and causing waste, a rubber plate 27 is installed at the lower edge of the inner curved surface of the oil outlet ring 20. The inner edge of the rubber plate 27 is attached to the thread on the valve stem 13 so that the oil flowing out of the oil outlet can be delivered to the valve stem 13.

[0036] In the second embodiment of the low-maintenance gate valve, in order to protect the valve stem 13 and prevent the oil on the valve stem 13 from failing too quickly, a bellows 28 is installed on the handwheel 16, and the bellows 28 is sleeved outside the valve stem 13.

[0037] In order to prevent the bottom of the bellows 28 from being excessively worn by the valve stem 13 when the bellows 28 rotates relative to the valve stem 13, a fixed disk is installed on the bottom wall of the bellows 28, and a turntable 29 is rotatably connected to the fixed disk. The turntable 29 is located above the valve stem 14.

[0038] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in this field within the scope of the present invention are included in the patent scope of the present invention.

Claims

1. A gate valve with low maintenance frequency, comprising a valve body (11), a valve cover (12) mounted on the valve body (11), a valve stem (13) fixed on a gate plate within the valve cover (12) and extending upward after passing through the valve cover (12), characterized in that: The valve cover (12) is connected to a mounting seat (15) through two No. 1 support arms (14) distributed front and back, and a drive nut is rotatably connected in the mounting seat (15). The valve stem (13) is processed with a thread for connecting with the drive nut, and the drive nut is equipped with a handwheel (16); it also includes a reinforcing plate (17) located between the No. 1 support arms (14), the reinforcing plate (17) is sleeved outside the valve stem (13), and the reinforcing plate (17) is connected to the valve cover (12) through two No. 2 support arms (18) distributed left and right; a lubrication assembly is provided on the reinforcing plate (17), the lubrication assembly includes an oil storage box (19) mounted on the reinforcing plate (17), the oil storage box (19) is equipped with an oil supply member that acts on the thread in the valve stem (13), and also includes an oil outlet mechanism that pushes the oil in the oil storage cavity in the oil storage box (19) to the oil supply member.

2. A low maintenance gate valve according to claim 1, characterized in that: The oil supply member is an oil outlet ring (20) fixed on the oil storage box (19), extending transversely and sleeved on the outside of the oil storage box (19), with the axis of the oil outlet ring (20) as the center, and oil outlets are provided at equal angles on the inner curved surface of the oil outlet ring (20).

3. A low maintenance gate valve according to claim 1, characterized in that: The oil outlet mechanism includes an oil pump chamber (24) provided in the oil storage box (19), a piston (25) is slidably connected to the oil pump chamber (24) in the left and right directions, a liquid inlet hole connected to the oil storage chamber and a liquid outlet hole connected to the oil supply member are further provided in the oil pump chamber (24), a one-way valve is respectively provided in the liquid inlet hole and the liquid outlet hole, a piston rod on the piston (25) extends transversely to the outside of the oil storage box (19), and a spring plate (26) is provided at the end of the piston rod, the spring plate (26) is connected to the side of the oil storage box (19) through a spring, and a butt joint is further provided on the side of the spring plate (26) away from the spring; The reinforcing plate (17) is provided with a rotating shaft (21) and a connecting shaft (31), the rotating shaft (21) and the connecting shaft (31) are connected via a synchronous belt (32), the rotating shaft (21) is provided with a pressure wheel (22) attached to the valve stem (13), the connecting shaft (31) is provided with an eccentric wheel (23), and the abutment joint abuts against the outer curved surface of the eccentric wheel (23).

4. A low maintenance gate valve according to claim 2, characterized in that: A rubber plate (27) is installed at the lower edge of the inner curved surface of the oil outlet ring (20), and the inner edge of the rubber plate (27) is attached to the thread on the valve stem (13).

5. The low maintenance gate valve according to claim 1, characterized in that: The hand wheel (16) is provided with a bellows (28), and the bellows (28) is sleeved outside the valve stem (13).

6. A low maintenance gate valve according to claim 5, characterized in that: A fixed disk is mounted on the bottom wall of the bellows (28), and a rotating disk (29) is rotatably connected to the fixed disk.

7. The low maintenance gate valve according to claim 1, characterized in that: An oil filling hole is provided in the oil storage box (19).

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