Soft seal gate valve with stable sealing mechanism

Abstract

The application relates to the technical field of valves, in particular to a soft sealing gate valve with stable sealing mechanism, which comprises a valve body, a hand wheel arranged at the upper end of the valve body, a valve rod arranged in the valve body and connected with the hand wheel, and a valve plate arranged in the valve body and connected with the valve rod, characterized in that the upper end of the valve plate is provided with a sealing plug; the sealing plug is in a boss-shaped structure, the upper end surface of the sealing plug is larger than the lower end surface, the outer wall of the sealing plug is provided with a sealing assembly, a sealing ring is arranged in the valve body, the sealing assembly is attached to the sealing ring, and a reinforcing and stabilizing mechanism is further arranged in the valve body. The double sealing of the sealing assembly and the reinforcing and stabilizing mechanism realizes the stable soft sealing effect of the gate valve when the valve plate is opened and closed, the use cost is low, and the effect is good.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve, in particular to a soft sealing gate valve with stable sealing mechanism. BACKGROUND

[0002] It is known that the soft sealing gate valve is an industrial valve, and its main working mode is to achieve the purpose of flow interception by sealing the pipeline with the gate plate in the valve. The gate valve can only be fully opened and closed, and cannot be used for regulation and throttling. The inner gate plate of the traditional gate valve moves up and down frequently, and the gate plate and the pipeline port are vertically rubbed frequently, which can easily cause the gate plate to be damaged by friction or shear, reduce the service life of the gate plate, and reduce the sealing performance. At the same time, due to the impact of the fluid in the pipeline on the gate plate, the gap between the gate plate and the pipeline port is easy to appear, which also affects the sealing performance of the valve. SUMMARY

[0003] The purpose of the present application is to overcome the shortcomings of the prior art and provide a soft sealing gate valve with stable sealing mechanism which has low use cost and good effect.

[0004] The purpose of the present application is achieved by a soft sealing gate valve with stable sealing mechanism, which comprises a valve body, a hand wheel arranged at the upper end of the valve body, a valve stem arranged in the valve body and connected with the hand wheel, and a valve plate arranged in the valve body and connected with the valve stem. The upper end of the valve plate is provided with a sealing plug, the sealing plug has a boss-shaped structure, the upper end surface of the sealing plug is larger than the lower end surface, the outer wall of the sealing plug is provided with a sealing assembly, the valve body is provided with a sealing ring, the sealing assembly is in contact with the sealing ring, and the valve body is further provided with a reinforcing and stabilizing mechanism.

[0005] Preferably, the sealing assembly comprises a first sealing gasket and a second sealing gasket, the first sealing gasket is located above the second sealing gasket, and the second sealing gasket is in contact with the sealing ring.

[0006] Preferably, the valve body has a T-shaped structure, the valve body comprises a horizontal part and a vertical part, the valve plate can move along the vertical part, the reinforcing and stabilizing mechanism comprises a sliding block, a connecting column and a sealing block, the horizontal part is provided with a sliding block, the sliding block is located on both sides of the valve plate, the inner wall of the horizontal part of the valve body is provided with a sliding groove matched with the sliding block, the opposite side walls of the sliding groove are provided with grooves, the side surface of the sliding block is provided with a protrusion matched with the groove, the upper end of the valve plate is provided with a connecting column, the sealing plug is arranged at the other end of the connecting column, the connecting column is fixedly connected with a sealing block on both sides, the sealing block is located below the sealing plug, and the inner surface of the sealing block is in abutment with the outer surface of the sliding block.

[0007] Preferably, the contact surface of the sliding block and the sealing block is an inclined surface.

[0008] Preferably, the inner wall of the vertical part of the valve body is provided with a containing groove, a spring is arranged in the containing groove, and the end of the spring is connected with a mounting block, and the sealing ring is mounted on the mounting block.

[0009] Preferably, the upper end edge of the sealing block is arc-shaped.

[0010] Preferably, the material of the valve plate is ethylene propylene diene rubber.

[0011] Preferably, the material of the sealing ring is hydrogenated nitrile rubber.

[0012] The soft sealing gate valve with the sealing mechanism has the advantages that when the valve plate rises along the vertical part, the upper edge of the valve plate pushes the two sliding blocks to move along the sliding grooves in the direction of relatively far away, the upper inclined side of the sliding block is in contact with the side wall of the valve plate, when the valve plate descends along the vertical part, the lower inclined side of the sealing block is in contact with the upper inclined side of the sliding block, the sealing block and the two sliding blocks on the two sides of the valve plate move along the sliding grooves in the direction of relatively close, and the stable soft sealing effect of the gate valve when the valve plate is opened and closed is realized through the double sealing of the sealing assembly and the reinforcing and stabilizing mechanism, the use cost is low, and the effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a sectional view of the valve body of the present application when the valve plate is not opened.

[0014] Figure 2 It is a sectional view of the valve body of the present application when the valve plate is opened.

[0015] Figure 3 It is a structural schematic view of the reinforcing and stabilizing mechanism of the present application.

[0016] Figure 4 It is a schematic view of the cooperation structure of the sealing ring and the second sealing gasket of the present application.

[0017] Figure 5 It is a front view of the sliding block of the present application.

[0018] Figure 6 It is a structural schematic view of the sliding groove of the present application.

[0019] Figure 7 It is a schematic view of the cooperation structure of the sliding groove and the sliding block of the present application.

[0020] In the drawings: 1, valve body, 2, hand wheel, 3, valve rod, 4, valve plate, 5, sealing plug, 6, first sealing gasket, 7, second sealing gasket, 8, sealing ring, 9, reinforcing and stabilizing mechanism, 10, sliding block, 11, connecting column, 12, sealing block, 13, sliding groove, 14, groove, 15, protrusion, 16, containing groove, 17, spring, 18, mounting block. DETAILED DESCRIPTION

[0021] The present invention will now be further described with reference to the accompanying drawings. Example 1

[0022] like Figures 1-7 As shown, a soft-seal gate valve with a stable sealing mechanism includes a valve body 1, a handwheel 2 disposed at the upper end of the valve body 1, a valve stem 3 disposed inside the valve body 1 and connected to the handwheel 2, and a valve plate 4 disposed inside the valve body 1 and connected to the valve stem 3. A sealing plug 5 is provided at the upper end of the valve plate 4. The sealing plug 5 has a boss-shaped structure and the upper end face of the sealing plug 5 is larger than the lower end face. A sealing component is provided on the outer wall of the sealing plug 5. A sealing ring 8 is installed inside the valve body 1. The sealing component fits into the sealing ring 8. A strengthening and stabilizing mechanism 9 is also provided inside the valve body 1.

[0023] The sealing assembly includes a first sealing gasket 6 and a second sealing gasket 7, with the first sealing gasket 6 located above the second sealing gasket 7 and the second sealing gasket 7 fitting against the sealing ring 8.

[0024] like Figure 3 As shown, the valve body 1 has a "T"-shaped structure. The valve body 1 includes a horizontal part and a vertical part. The valve plate 4 can move along the vertical part. The strengthening and stabilizing mechanism 9 includes a slider 10, a connecting column 11, and a sealing block 12. The horizontal part is provided with a slider 10, which is located on both sides of the valve plate 4. The inner wall of the horizontal part of the valve body 1 has a groove 13 that matches the slider 10. The opposite side walls of the groove 13 are provided with recesses 14. The side of the slider 10 is fixedly connected with a protrusion 15 that matches the recess 14. The width of the protrusion 15 is equal to the width of the groove 14. The width of the groove 14 and the height of the protrusion 15 are equal to the height of the groove 14. Through the cooperation of the groove 14 and the protrusion 15, the slider 10 is supported to prevent it from falling. A connecting post 11 is installed on the upper end of the valve plate 4, and a sealing plug 5 is installed on the other end of the connecting post 11. Sealing blocks 12 are fixedly connected to both sides of the connecting post 11. The sealing blocks 12 are located below the sealing plug 5. The inner surface of the sealing block 12 abuts against the outer surface of the slider 10. The contact surface between the slider 10 and the sealing block 12 is an inclined surface.

[0025] When the strengthening and stabilizing mechanism 9 is used, when the valve plate 4 rises along the vertical part, the upper edge of the valve plate 4 pushes the sliders 10 on both sides to move along the slide groove 13 in a relatively distant direction. The upper edge of the slider 10 is in contact with the side wall of the valve plate 4. When the valve plate 4 descends along the vertical part, the lower inclined side of the sealing block 12 is in contact with the upper inclined side of the slider 10. The sealing block 12 carries the sliders 10 on both sides of the valve plate 4 to move along the slide groove 13 in a relatively close direction.

[0026] The inner wall of the vertical part of the valve body 1 is provided with a containing groove 16, a spring 17 is installed in the containing groove 16, the end of the spring 17 is connected with a mounting block 18, the sealing ring 8 is installed on the mounting block 18, the upper end edge of the sealing block 12 is arc-shaped and the arc is adapted to the arc of the sealing ring 8, the side wall of the sealing block 12 pushes the sealing ring 8 towards the inside of the containing groove 16 during the rising of the valve plate 4, and the sealing block 12 returns to the original position under the action of the spring 17 after passing through the sealing ring 8.

[0027] In the embodiment, the material of the valve plate 4 is ethylene-propylene-diene monomer, which is a terpolymer of ethylene, propylene and non-conjugated diene, has superior oxidation resistance and corrosion resistance, and can greatly prolong the service life of the valve plate 4.

[0028] In the embodiment, the material of the sealing ring 8 is hydrogenated nitrile rubber, which is a highly saturated elastomer obtained by special hydrogenation treatment of nitrile rubber, has excellent corrosion resistance and high compression deformation resistance, and can greatly prolong the service life of the sealing ring 8.

[0029] The working principle of the present application is as follows: when in use, the hand wheel 2 is twisted to drive the valve rod 3 to rotate synchronously to adjust the height of the valve plate 4 through the connecting column 11, the working mode and principle of the gate valve are the existing technology on the market, so they are not described in detail here, when the valve plate 4 rises along the vertical part, the upper edge of the valve plate 4 pushes the sliding blocks 10 on both sides to move along the sliding grooves 13 towards the opposite direction, the upper edge of the sliding blocks 10 is in contact with the side wall of the valve plate 4, when the valve plate 4 descends along the vertical part, the downward inclined side of the sealing block 12 is in contact with the upward inclined side of the sliding blocks 10, the sealing block 12 drives the sliding blocks 10 on both sides of the valve plate 4 to move along the sliding grooves 13 towards the opposite direction, and the side wall of the sealing block 12 pushes the sealing ring 8 towards the inside of the containing groove 16 during the rising of the valve plate 4, and the sealing block 12 returns to the original position after passing through the sealing ring 8 under the action of the spring 17, the double sealing of the sealing assembly and the reinforcing and stabilizing mechanism 9 in the embodiment realizes the stable soft sealing effect of the gate valve, has low use cost and good effect.

[0030] The above is only the preferred embodiment of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, the skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for some technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A soft seal gate valve with a sealing mechanism stabilizer, comprising a valve body, a hand wheel arranged on an upper end of the valve body, a valve stem arranged in the valve body and connected with the hand wheel, and a valve plate arranged in the valve body and connected with the valve stem, characterized in that: The upper end of the valve plate is provided with a sealing plug, the sealing plug is in the form of a boss, the upper end face of the sealing plug is larger than the lower end face, the outer wall of the sealing plug is provided with a sealing assembly, the valve body is provided with a sealing ring, the sealing assembly is in contact with the sealing ring, and the valve body is further provided with a reinforcing and stabilizing mechanism; The sealing assembly comprises a first sealing gasket and a second sealing gasket, the first sealing gasket is located above the second sealing gasket, and the second sealing gasket is in contact with the sealing ring. The valve body is in the form of a "T", the valve body comprises a horizontal part and a vertical part, the valve plate can move along the vertical part, the reinforcing and stabilizing mechanism comprises a sliding block, a connecting column and a sealing block, the horizontal part is provided with the sliding block, the sliding block is located on both sides of the valve plate, the inner wall of the horizontal part of the valve body is provided with a sliding groove matched with the sliding block, the opposite side walls of the sliding groove are provided with grooves, the side surface of the sliding block is provided with protrusions matched with the grooves, the upper end of the valve plate is provided with the connecting column, the sealing plug is arranged at the other end of the connecting column, the connecting column is fixedly connected with the sealing block on both sides, the sealing block is located below the sealing plug, and the inner surface of the sealing block is in abutment with the outer surface of the sliding block; the contact surfaces of the sliding block and the sealing block are inclined surfaces; when the valve plate descends along the vertical part, the lower inclined side surface of the sealing block is in contact with the upper inclined side surface of the sliding block, and the sealing block moves along the sliding groove in the direction of approaching each other with the sliding blocks on both sides of the valve plate.

2. A soft seal gate valve stabilized by a sealing mechanism according to claim 1, characterized in that: The inner wall of the vertical part of the valve body is provided with a containing groove, the containing groove is provided with a spring, the end of the spring is connected with a mounting block, and the sealing ring is mounted on the mounting block.

3. A soft seal gate valve stabilized by a sealing mechanism according to claim 1, characterized in that: The upper end of the sealing block is in the form of an arc surface.

4. A soft seal gate valve stabilized by a sealing mechanism according to claim 1, characterized in that: The material of the valve plate is ethylene propylene diene rubber.

5. A soft seal gate valve stabilized by a sealing mechanism according to claim 1, characterized in that: The material of the sealing ring is hydrogenated nitrile rubber.

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