Large-caliber high-pressure stop valve

Abstract

The utility model relates to a large-caliber high-pressure stop valve in the technical field of stop valves. The valve element comprises a valve clack, a valve deck used for limiting the valve clack is installed at the upper end of the valve clack, the valve deck comprises a cavity, a valve rod is installed at the upper end of the valve clack, a first through hole used for allowing a medium to flow to the cavity is machined in the upper end of the valve clack, and a second through hole used for allowing the medium to flow to the outlet is machined in the upper end of the valve clack. A blocking ball used for opening and closing the second through hole is installed in the valve clack. When an inlet is closed by a valve clack and a sliding block slides from a groove cavity of a first vertical groove to groove cavities of a first transverse groove, a third vertical groove and a second transverse groove, under the acting force of a second spring, the sliding block slides to a groove cavity of the second vertical groove, a push rod is far away from a blocking ball, the blocking ball seals a conical hole cavity of a guide block, and a medium is prevented from continuously flowing to an outlet through a second through hole; when the valve is closed, a medium gradually flows to the cavity through the first through hole, downward acting force is applied to the valve clack, then the torque during closing is reduced, and the valve can be used under the large-caliber high-pressure working condition.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stop valve especially relates to a large-diameter high-pressure stop valve. BACKGROUND

[0002] The medium of the stop valve enters from below the valve disc and flows out from above the valve disc, the valve rod and the valve disc bear the full load pressure below the closed valve disc, and the closing or opening of the stop valve is realized by the valve disc acting on the valve rod to overcome the dynamic pressure and static pressure of the medium front (or back), so the valve rod is under great pressure and has a large size.

[0003] If the medium of the medium straight-through stop valve flows from below the valve seat to above the valve seat, the high-speed flowing medium spouted from the valve seat needs to be sealed when the valve is closed, the closing speed of the valve is slow, the valve rod is under the greatest force at this time, and in severe cases, the valve rod can be bent and deformed, affecting the normal use of the stop valve. UTILITY MODEL CONTENTS

[0004] To solve the problem of the bending deformation of the valve rod caused by the force when the valve is closed in the background technology, the utility model provides the following technical scheme:

[0005] A large-diameter high-pressure stop valve, comprising a valve body;

[0006] The lower end of the valve body is machined with an inlet, the right end of the valve body is machined with an outlet, and the inlet and the outlet are in communication, and the inside of the valve body is installed with a valve core for opening and closing the inlet.

[0007] The valve core comprises a valve disc, the upper end of the valve disc is installed with a valve cover for limiting the valve disc, the valve cover comprises a cavity, and the upper end of the valve disc is installed with a valve rod.

[0008] The upper end of the valve disc is machined with a first through hole for the medium to flow into the cavity, the upper end of the valve disc is machined with a second through hole for the medium to flow out of the outlet, and the inside of the valve disc is installed with a stop ball for opening and closing the second through hole.

[0009] The inside of the valve disc is installed with a push rod for controlling the movement of the stop ball.

[0010] Further, the upper end of the valve body is installed with a cylinder cover, and the upper end of the cylinder cover is installed with a plurality of bolts for limiting the cylinder cover.

[0011] Further, the upper end of the valve disc is installed with a first sealing rubber ring and a second sealing rubber ring for preventing medium leakage, the middle part of the second through hole is installed with a guide block, and the stop ball is used for opening and closing the middle hole of the guide block, and the upper end of the stop ball is installed with a spring one for pushing the stop ball.

[0012] Furthermore, a slider is installed at one end of the push rod, a baffle is installed in the middle of the push rod, and a spring for pushing the baffle is sleeved in the middle of the push rod.

[0013] Furthermore, one end of the valve cover is machined with a limiting groove for the push rod to slide up and down, and a push plate is installed at the bottom of the limiting groove to push the push rod toward the stop ball. A V-shaped spring is installed at one end of the push plate to control the push plate to move toward the push rod.

[0014] Furthermore, the limiting groove is machined with a first vertical groove, a second vertical groove, an inclined groove, a first horizontal groove, a third vertical groove, and a second horizontal groove for guiding the slider.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. When the valve disc opens the inlet, the valve disc moves upward, and the medium flows from the inlet to the outlet. A portion of the medium flows through the central hole of the valve disc to the first through hole, and then through the first through hole to the cavity and the second through hole in sequence. When the valve disc moves upward, the slider slides from the groove cavity of the inclined groove to the groove cavity of the first vertical groove. The push rod pushes the stop ball synchronously, and the medium flows through the conical cavity of the guide block to the outlet. This facilitates the upward movement of the valve disc to open the inlet, reduces the opening torque, and avoids the valve stem from bending deformation due to stress.

[0017] 2. When the valve disc closes the inlet, the slider slides from the first vertical groove cavity to the first horizontal groove, the third vertical groove, and the second horizontal groove cavity. Under the action of the second spring, the slider slides to the second vertical groove cavity, the push rod moves away from the stop ball, and the stop ball seals the conical cavity of the guide block, preventing the medium from continuing to flow to the outlet through the second through hole. The medium gradually flows to the cavity through the first through hole, giving the valve disc a downward force, thereby reducing the torque when closing, so as to be used in large-diameter high-pressure conditions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the valve body of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the shut-off valve of this utility model;

[0021] Figure 4 This utility model Figure 3 Enlarged view of point A;

[0022] Figure 5 This utility model Figure 3 Enlarged view of point B;

[0023] Figure 6 This utility model Figure 3 Enlarged view of point C.

[0024] The following is a list of component names represented by the various reference numerals in the attached figures:

[0025] 100 - Valve body, 110 - Inlet, 120 - Outlet, 130 - Cylinder head, 131 - Bolt;

[0026] 200-Valve core, 210-Valve disc, 211-First sealing rubber ring, 212-Second sealing rubber ring, 213-First through hole, 214-Second through hole, 215-Guide block, 216-Block ball, 217-Spring one, 10-Push rod, 11-Slider, 12-Baffle, 13-Spring two, 220-Valve cover, 20-Cavity, 221-Limiting groove, 222-Push plate, 223-V-shaped spring, 224-First vertical groove, 225-Second vertical groove, 226-Slanted groove, 227-First horizontal groove, 228-Third vertical groove, 229-Second horizontal groove, 230-Valve stem. Detailed Implementation

[0027] The preferred embodiments of this utility model are described in detail below, and a clear and complete explanation is given in conjunction with the accompanying drawings.

[0028] Please see Figures 1-6 This utility model provides a large-diameter high-pressure shut-off valve, including a valve body 100.

[0029] The lower end of the valve body 100 is machined with an inlet 110, and the right end of the valve body 100 is machined with an outlet 120, and the inlet 110 and the outlet 120 are connected to facilitate the flow of the medium. A cylinder head 130 is installed on the upper end of the valve body 100, and a plurality of bolts 131 for limiting the cylinder head 130 are installed on the upper end of the cylinder head 130.

[0030] The valve body 100 is internally equipped with a valve core 200 for opening and closing the inlet 110. The valve core 200 includes a valve disc 210, and a valve cover 220 for limiting the valve disc 210 is installed at its upper end. The valve cover 220 includes a cavity 20, and the valve disc 210 moves up and down inside the cavity 20. A valve stem 230 is installed at the upper end of the valve disc 210.

[0031] The upper end of the valve disc 210 is equipped with a first sealing rubber ring 211 and a second sealing rubber ring 212 to prevent medium leakage. The upper end of the valve disc 210 is machined with a first through hole 213 for the medium to flow to the cavity 20. The bottom of the valve disc 210 is machined with a central hole. The medium can flow through the central hole of the valve disc 210 to the first through hole 213, and then through the first through hole 213 to the cavity 20.

[0032] The upper end of the valve disc 210 is machined with a second through hole 214 for allowing the medium to flow to the outlet 120. The medium inside the cavity 20 can flow to the outlet 120 through the second through hole 214. A guide block 215 is installed in the middle of the second through hole 214. A tapered cavity is machined in the middle of the guide block 215, and the tapered cavity is connected to the second through hole 214.

[0033] The lower end of the valve stem 230 is machined with multiple annular grooves. The middle part of the valve stem sleeve at the lower end of the valve stem 230 is machined with cavities a and b that communicate with the annular grooves. The upper end of the cavity of the second through hole 214 is provided with a cavity c that communicates with cavity a. The inside of the valve disc 210 is machined with a cavity d that communicates with cavity b. When the valve disc 210 closes the inlet 110, the cavity d and the inner wall of the inlet 110 are pressed together, and the medium cannot flow. When the valve disc 210 flows upward, the gap between the cavity d and the inlet 110 gradually increases, so that the medium in the second through hole 214 flows through cavity c to cavity a, flows through the annular groove at the lower end of the valve stem 230 to cavity b, and finally flows through cavity d to outlet 120.

[0034] The valve disc 210 is equipped with a retaining ball 216 for opening and closing the conical cavity of the guide block 215. The upper end of the retaining ball 216 is equipped with a spring 217 for pushing the retaining ball 216. When the push rod 10 does not push the retaining ball 216, the spring 217 pushes the retaining ball 216 to close the conical cavity of the guide block 215.

[0035] The valve disc 210 is equipped with a push rod 10 for controlling the movement of the baffle ball 216. When the push rod 10 pushes the baffle ball 216, it causes the baffle ball 216 to disengage from the conical cavity of the guide block 215, so that the medium can flow to the outlet 120 through the second through hole 214 and the conical cavity of the guide block 215.

[0036] A slider 11 is installed at one end of the push rod 10 near the valve cover 220. A baffle 12 is fixedly installed in the middle of the push rod 10. A spring 13 for pushing the baffle 12 is sleeved in the middle of the push rod 10. The push rod 10 moves toward the valve cover 220 by means of the spring 13.

[0037] One end of the valve cover 220 is machined with a limiting groove 221 for the push rod 10 to slide up and down. A push plate 222 is installed at the bottom of the groove 221 to push the push rod 10 towards the stop ball 216. The push plate 222 includes an inclined plate and a vertical plate. A plurality of V-shaped springs 223 are installed at one end of the push plate 222 to control its movement towards the push rod 10.

[0038] The limiting groove 221 has a groove cavity machined with a first vertical groove 224, a second vertical groove 225, an inclined groove 226, a first horizontal groove 227, a third vertical groove 228, and a second horizontal groove 229 for guiding the slider 11. The slider 11 passes through the inclined groove 226, the first vertical groove 224, the first horizontal groove 227, the third vertical groove 228, the second horizontal groove 229, and the second vertical groove 225 in sequence, and finally slides to one end of the inclined groove 226. When the valve disc 210 is closed to the inlet 110, the slider 11 is at the lower end of the groove cavity of the inclined groove 226.

[0039] When valve disc 210 opens inlet 110, valve disc 210 moves upward, and the medium flows through inlet 110 to outlet 120. A portion of the medium flows through the central hole of valve disc 210 to the first through hole 213, and then through the first through hole 213 to the cavity 20 and the second through hole 214. When valve disc 210 moves upward, slider 11 slides from the groove of inclined groove 226 to the groove of first vertical groove 224. When slider 11 is in the groove of first vertical groove 224, push rod 10 pushes stop ball 216, and the medium flows through the conical cavity of guide block 215 to outlet 120, which facilitates valve disc 210 moving upward to open inlet 110, reduces opening torque, and avoids bending deformation of valve stem 230 due to force.

[0040] When valve disc 210 closes inlet 110, slider 11 slides from the cavity of first vertical groove 224 to the cavity of first horizontal groove 227, and slides down to one end of third vertical groove 228 under the force of spring 213. When slider 11 is in the cavity of third vertical groove 228, the pushing distance of push rod 10 to stop ball 216 decreases, and the medium flow rate decreases. When slider 11 slides down from the cavity of third vertical groove 228 to the cavity of second horizontal groove 229, under the force of spring 213, slider 11 slides to the cavity of second vertical groove 225, push rod 10 moves away from stop ball 216, and stop ball 216 seals the conical cavity of guide block 215, preventing the medium from continuing to flow to outlet 120 through second through hole 214. The medium gradually flows to cavity 20 through first through hole 213, giving valve disc 210 a downward force, thereby reducing the torque when closing, so as to be used in large-diameter high-pressure conditions.

[0041] When the slider 11 slides from the second vertical groove 225 to the lower end of the inclined groove 226, the V-shaped spring 223 controls the push plate 222 to push one end of the push rod 10, so that the slider 11 can slide through the inclined groove 226 into the cavity of the first vertical groove 224.

[0042] Based on the above description and accompanying drawings, those skilled in the art can understand and implement this utility model. Furthermore, any non-creative modifications made to this utility model by those skilled in the art without inventive effort are still within the protection scope of this utility model.

Claims

1. A large-diameter high-pressure shut-off valve, comprising a valve body (100), characterized in that: The lower end of the valve body (100) is machined with an inlet (110), and the right end of the valve body (100) is machined with an outlet (120). The inlet (110) and the outlet (120) are connected. The valve core (200) for opening and closing the inlet (110) is installed inside the valve body (100). The valve core (200) includes a valve disc (210), and a valve cover (220) for limiting the valve disc (210) is installed at the upper end of the valve disc (210). The valve cover (220) includes a cavity (20), and a valve stem (230) is installed at the upper end of the valve disc (210). The upper end of the valve disc (210) is machined with a first through hole (213) for allowing the medium to flow to the cavity (20), and the upper end of the valve disc (210) is machined with a second through hole (214) for allowing the medium to flow to the outlet (120). A baffle ball (216) for opening and closing the second through hole (214) is installed inside the valve disc (210). The valve disc (210) is internally fitted with a push rod (10) for controlling the movement of the stop ball (216).

2. The large-diameter high-pressure shut-off valve according to claim 1, characterized in that: A cylinder head (130) is mounted on the upper end of the valve body (100), and a plurality of bolts (131) for limiting the cylinder head (130) are mounted on the upper end of the cylinder head (130).

3. The large-diameter high-pressure shut-off valve according to claim 1, characterized in that: The upper end of the valve disc (210) is equipped with a first sealing rubber ring (211) and a second sealing rubber ring (212) to prevent medium leakage. A guide block (215) is installed in the middle of the second through hole (214), and a stop ball (216) is used to open and close the middle hole of the guide block (215). A spring (217) is installed at the upper end of the stop ball (216) to push the stop ball (216).

4. The large-diameter high-pressure shut-off valve according to claim 1, characterized in that: A slider (11) is installed at one end of the push rod (10), a baffle (12) is installed in the middle of the push rod (10), and a spring (13) for pushing the baffle (12) is sleeved in the middle of the push rod (10).

5. A large-diameter high-pressure shut-off valve according to claim 4, characterized in that: One end of the valve cover (220) is machined with a limiting groove (221) for the push rod (10) to slide up and down. The bottom of the groove cavity of the limiting groove (221) is equipped with a push plate (222) for pushing the push rod (10) towards the stop ball (216). One end of the push plate (222) is equipped with a V-shaped spring (223) for controlling the push plate (222) to move towards the push rod (10).

6. A large-diameter high-pressure shut-off valve according to claim 5, characterized in that: The limiting groove (221) has a first vertical groove (224), a second vertical groove (225), an inclined groove (226), a first horizontal groove (227), a third vertical groove (228), and a second horizontal groove (229) for guiding the slider (11).

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