Stop valve

Abstract

The utility model relates to the technical field of stop valves, and discloses a stop valve which comprises a valve body, a placing seat, a valve cover and a valve rod, the two sides of the valve body are communicated, the placing seat is arranged on the valve body, the valve cover is arranged on the placing seat, the valve rod movably penetrates through the valve cover and the placing seat and extends into the valve body, a baffle is arranged in an inner cavity of the valve body, and the baffle is arranged in the inner cavity of the valve body. A baffle is arranged at the bottom of the valve rod, an opening is formed in the baffle, a valve element is arranged at the bottom of the valve rod, the valve element is matched with the opening, a groove is formed in the bottom of the containing base, and elastic moving assemblies are arranged on the two sides in the groove. The problems that in the prior art, friction between a valve element and a shielding block can reduce the precision of the valve element, consequently, the sealing performance of the valve element is affected, and the service life of the valve element is shortened are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cut -off valve technical field especially relates to a cut -off valve. BACKGROUND

[0002] The cut -off valve is a kind of commonly used valve, is widely used in the fluid pipeline of various working conditions, and its main function is to open or close the fluid flow in valve body.The cut -off valve is characterized by the close contact between valve core (valve flap) and valve seat when the valve is opened and closed, which can cut off the flow of fluid very well.

[0003] The cut -off valve core is in the middle of the flow passage of the valve, and the up-and-down movement of the valve core makes the cut -off valve cut off and connect the medium flow in the pipeline, and the valve core changes the fluid flow direction in the valve during the opening and closing process of the valve, so that the valve core in the flow passage interferes with the normal flow of medium when the valve is fully open, thereby increasing the pressure drop of the valve and reducing the flow capacity of the valve;In the medium carrying some solid particles, the fluid carrying solid particles will scour the valve core of the cut -off valve, and then the surface of the valve core is abraded, which finally affects the sealing performance of the valve core during sealing, thereby affecting the sealing performance of the valve core, reducing the service life of the valve core and increasing the operation cost of the system. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at solving the problems existing in the prior art and provides a cut -off valve.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A cut -off valve, comprising a valve body, a placing seat, a valve cover, a valve stem, the two sides of the valve body are connected, the placing seat is arranged on the valve body, the valve cover is arranged on the placing seat, the valve stem is movably penetrated through the valve cover and the placing seat and extends into the valve body;

[0007] The inner cavity of the valve body is provided with a baffle, the baffle is provided with an opening, the bottom of the valve stem is provided with a valve core, and the valve core is matched with the opening, the bottom of the placing seat is provided with a groove, the two sides of the groove are both provided with elastic moving assemblies, the side corresponding to the two elastic moving assemblies is both provided with a shielding plate, the two shielding plates are slidably arranged in the groove, the side of the two shielding plates is both provided with a connecting rod through a rotating shaft, and the two connecting rods are connected with the side of the top of the valve core through a rotating shaft.

[0008] Preferably, the valve core is a circular truncated cone, the top of the valve core is connected with the bottom of the valve stem, and the bottom of the valve core is matched with the opening.

[0009] Preferably, the elastic moving assembly comprises a telescopic rod and a spring, one side of the telescopic rod is connected with the groove inner cavity, the moving end of the telescopic rod is connected with one side of the shielding plate, the spring is sleeved on the outer periphery of the telescopic rod, one end of the spring is connected with the groove inner cavity, and the other end of the spring is connected with one side of the shielding plate.

[0010] Preferably, the two shielding plates are provided with semicircular grooves on the side close to each other, the inner walls of the two semicircular grooves are provided with sealing pads, the center of the bottom of the valve core is provided with a connecting column, and the connecting column is matched with the combined two semicircular grooves.

[0011] Preferably, the valve cover is provided with a mounting groove, the valve rod is movably arranged in the mounting groove, and a sealing ring is arranged on the outer periphery of the valve rod and in contact with the inner wall of the mounting groove.

[0012] Preferably, a threaded rod is rotatably arranged on the valve cover, the valve rod is rotatably connected with the bottom of the threaded rod, and a handle is arranged at the top end of the threaded rod.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model discloses a valve rod and valve core can be driven by the valve rod and make the connecting rod rotate, make the shielding plate stress, drive the shielding plate to compress the elastic moving assembly, the valve core rises, the elastic moving assembly releases energy, makes two shielding plates splicing together and shields the valve core, protects the valve core from fluid scouring, compared with the prior art, the device optimizes the flow channel design of valve whole, fluid will not be blocked by the valve core, reduces the flow change and reduces the pressure drop to the maximum extent, improves the operation efficiency of system and reduces the operation cost of system. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic view of the stop valve that the utility model proposes;

[0016] Figure 2 It is a valve body inside schematic view of the stop valve that the utility model proposes;

[0017] Figure 3 It is a placing seat bottom schematic view of the stop valve that the utility model proposes;

[0018] Figure 4 It is a connecting rod schematic view of the stop valve that the utility model proposes;

[0019] Figure 5 It is a stop valve that the utility model proposes; Figure 4 A enlarged schematic view;

[0020] Figure 6 The utility model provides a semicircular groove schematic view of stop valve.

[0021] In the figure: 1, valve body; 2, place seat; 3, valve cover; 4, valve stem; 5, baffle; 6, opening; 7, valve core; 8, recess; 9, shield plate; 10, connecting rod; 11, telescopic link; 12, spring; 13, installation groove; 14, sealing ring; 15, threaded rod; 16, handle; 17, sealing pad; 18, semicircular groove; 19, connecting column; 20, rotating shaft. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0023] Reference Figures 1 to 5 A kind of stop valve, including valve body 1, place seat 2, valve cover 3, valve stem 4, the two sides of the valve body 1 are connected, the place seat 2 is arranged on valve body 1, the valve cover 3 is arranged on place seat 2, the valve stem 4 is movably penetrated valve cover 3 and place seat 2 extends to the inside of valve body 1;

[0024] The inner cavity of the valve body 1 is provided with baffle 5, the baffle 5 is provided with opening 6, the bottom of the valve stem 4 is provided with valve core 7, and the valve core 7 is adapted to opening 6, the bottom of the place seat 2 is provided with recess 8, the two sides in the recess 8 are both provided with elastic moving assembly, the side corresponding to two the elastic moving assembly is both provided with shield plate 9, two the shield plate 9 is slidably arranged in recess 8, the side of two the shield plate 9 is both provided with connecting rod 10 by rotating shaft 20, and the connecting rod 10 is connected with the side of the top of valve core 7 by rotating shaft 20.

[0025] The device can drive valve core 7 to move up by valve stem 4 when in use, so that connecting rod 10 rotates, shield plate 9 is stressed, elastic moving assembly is compressed by shield plate 9, after valve core 7 rises, elastic moving assembly releases energy, and two shield plates 9 are spliced together to shield valve core 7, so that valve core 7 is protected from fluid scouring. Compared with the prior art, the connecting rod 10 provided in the device allows valve core 7 not to contact shield plate 9 during the upward movement of valve core 7, so that wear is not generated, the service life of valve core 7 is increased, and the problem that the friction between valve core 7 and the shield block in the prior art reduces the precision of valve core 7, thereby affecting the sealing performance of valve core 7 and reducing the service life of valve core 7 is solved.

[0026] Further, the valve core 7 is a circular truncated cone, the top of the valve core 7 is connected with the bottom of the valve rod 4, and the bottom of the valve core 7 is matched with the opening 6. By matching the valve core 7 with the circular truncated cone, the bottom of the valve core 7 is prevented from being in contact with the shielding plate 9 during the movement of the valve core 7, thereby preventing the valve core 7 from being abraded.

[0027] Further, the elastic moving assembly comprises a telescopic rod 11 and a spring 12. One side of the telescopic rod 11 is connected with the inner cavity of the groove 8, and the moving end of the telescopic rod 11 is connected with one side of the shielding plate 9. The spring 12 is sleeved on the outer periphery of the telescopic rod 11, one end of the spring 12 is connected with the inner cavity of the groove 8, and the other end of the spring 12 is connected with one side of the shielding plate 9. By arranging the spring 12, the shielding plate 9 can be moved to both sides by the rotation of the connecting rod 10 during the movement of the valve core 7, and the spring 12 is compressed. When the valve core 7 moves above the shielding plate 9, the spring 12 is reset, and the two shielding plates 9 are spliced together to shield the valve core 7, thereby protecting the valve core 7 from being washed by the fluid. By arranging the telescopic rod 11, the spring 12 can be guided when it is compressed, thereby preventing the spring 12 from being deviated when it is compressed.

[0028] Further, one side of each of the two shielding plates 9 close to each other is provided with a semicircular groove 18, and the inner wall of each of the two semicircular grooves 18 is provided with a sealing gasket 17. The center of the bottom of the valve core 7 is provided with a connecting column 19, and the connecting column 19 is matched with the combined two semicircular grooves 18. By arranging the semicircular groove 18, when the valve core 7 moves above the shielding plate 9, the connecting column 19 can be inserted between the two semicircular grooves 18, thereby preventing water from overflowing between the two shielding plates 9, and increasing the sealing performance.

[0029] Further, the valve cover 3 is provided with a mounting groove 13, and the valve rod 4 is movably arranged in the mounting groove 13. The outer periphery of the valve rod 4 is provided with a sealing ring 14, and the sealing ring 14 is in contact with the inner wall of the mounting groove 13. By arranging the mounting groove 13, the valve rod 4 can be mounted in the mounting groove 13. By arranging the sealing ring 14, the outer periphery of the valve rod 4 can be sealed when the valve rod 4 moves, thereby preventing water from overflowing.

[0030] Further, the valve cover 3 is provided with a threaded rod 15 which is rotatably arranged on the valve cover 3. The valve rod 4 is rotatably connected with the bottom of the threaded rod 15. The top end of the threaded rod 15 is provided with a handle 16. By arranging the handle 16, the threaded rod 15 can be rotated by holding the handle 16 when in use. The valve rod 4 is moved by the threaded rod 15, and the valve core 7 is moved upward.

[0031] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A stop valve, comprising a valve body (1), a placing base (2), a valve cover (3), a valve rod (4), both sides of the valve body (1) being connected, the placing base (2) being arranged on the valve body (1), the valve cover (3) being arranged on the placing base (2), the valve rod (4) being movably arranged through the valve cover (3) and the placing base (2) and extending into the valve body (1); The inner cavity of the valve body (1) is provided with a baffle (5), the baffle (5) is provided with an opening (6), the bottom of the valve rod (4) is provided with a valve core (7), and the valve core (7) is matched with the opening (6), characterized in that: a groove (8) is arranged at the bottom of the placing base (2), both sides of the groove (8) are provided with elastic moving assemblies, one side of each of the two elastic moving assemblies is provided with a shielding plate (9), the two shielding plates (9) are slidingly arranged in the groove (8), the side of each of the two shielding plates (9) is provided with a connecting rod (10) through a rotating shaft, and one side of the top of the valve core (7) is connected with the two connecting rods (10) through rotating shafts.

2. A globe valve according to claim 1, characterized in that: The valve core (7) is in the shape of a circular truncated cone, the top of the valve core (7) is connected with the bottom of the valve rod (4), and the bottom of the valve core (7) is matched with the opening (6).

3. A globe valve according to claim 1, wherein: The elastic moving assembly comprises a telescopic rod (11) and a spring (12), one side of the telescopic rod (11) is connected with the inner cavity of the groove (8), the moving end of the telescopic rod (11) is connected with one side of the shielding plate (9), the spring (12) is sleeved on the outer periphery of the telescopic rod (11), one end of the spring (12) is connected with the inner cavity of the groove (8), and the other end of the spring (12) is connected with one side of the shielding plate (9).

4. A globe valve according to claim 1, wherein: One side of each of the two shielding plates (9) is provided with a semicircular groove (18), the inner wall of each of the two semicircular grooves (18) is provided with a sealing gasket (17), and the center of the bottom of the valve core (7) is provided with a connecting column (19) matched with the combined two semicircular grooves (18).

5. A globe valve according to claim 1, wherein: The valve cover (3) is provided with a mounting groove (13), the valve rod (4) is movably arranged in the mounting groove (13), a sealing ring (14) is mounted on the outer periphery of the valve rod (4), and the sealing ring (14) is in contact with the inner wall of the mounting groove (13).

6. A globe valve according to claim 1, wherein: A threaded rod (15) is rotatably arranged on the valve cover (3), the valve rod (4) is rotatably connected with the bottom of the threaded rod (15), and a handle (16) is arranged at the top end of the threaded rod (15).

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