Spiral opening and closing type plastic shut-off stop valve

Abstract

The utility model provides a spiral opening and closing type plastic shut-off stop valve, and belongs to the technical field of valve manufacturing. The problem that an existing stop valve is short in service life is solved. The spiral opening and closing type plastic shut-off stop valve comprises a valve body and a valve cover, a valve rod is in threaded connection with the interior of the valve cover, filler is arranged between the valve cover and the valve rod, a pressing cover penetrates through the top of the valve cover, a first screw penetrates through and is fixedly connected to the bottom end of the valve rod, and a sealing plate fixedly sleeves the surface of the first screw; a rubber pad is fixedly connected to the bottom of the sealing plate, threaded holes are formed in the two sides of the valve deck, inner cavities of the threaded holes are in threaded connection with limiting mechanisms, the limiting mechanisms comprise limiting bolts, and limiting grooves are formed in the top of the surface of the valve deck. According to the utility model, the pressing cover can be limited and fixed, so that the pressing cover does not fall off when being subjected to water pressure impact and frequent opening and closing actions, and the sealing performance is further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve manufacturing technical field relates to a stop valve especially relates to a spiral opening and closing type plastic closing stop valve. BACKGROUND

[0002] The stop valve is a kind of valve widely used in various pipeline systems, and is commonly used to control the flow of various fluid media, such as steam, water, oil, gas, etc.

[0003] For example, Chinese patent document discloses a kind of stop valve [application number: 202321179435.8;Grant announcement number: CN220037454U], it includes: valve body, valve cover and valve rod, valve cover is installed on valve body, valve body has overflow port, valve rod and valve cover movable cooperation, and valve rod extends into the valve body, valve plate, valve plate is fixed on valve rod, and sealing ring is arranged between valve plate and valve rod, sealing gasket is clamped on valve plate, and sealing gasket and overflow port are sealed cooperation.

[0004] The sealing effect of the above-mentioned stop valve is good, and the automatic guiding effect is good, but it does not have a limiting structure, so that the valve cover cannot be effectively limited, and with frequent opening and closing action, and continuous vibration generated during equipment operation, the valve cover is easy to loosen gradually in the absence of limiting constraint, and the loosening condition is continuously aggravated, even to the phenomenon of falling off, thereby seriously affecting the normal function of the stop valve, causing medium leakage, and affecting the stable operation of pipeline system. SUMMARY

[0005] The utility model discloses a kind of spiral opening and closing type plastic closing stop valve, which can limit the valve cover and avoid the valve cover loosening.

[0006] The utility model discloses a kind of spiral opening and closing type plastic closing stop valve, which can limit the valve cover and avoid the valve cover loosening.

[0007] The screw opening and closing type plastic closing stop valve mainly sets screw holes, limiting mechanisms, limiting bolts and limiting grooves on the surface of the valve cover, and through the cooperation of the screw holes, limiting mechanisms, limiting bolts and limiting grooves, the compression cover can be fixed in position, so that it is not easy to fall off, the sealing performance between the valve cover and the compression cover is improved, and leakage of liquid is prevented.

[0008] In the screw opening and closing type plastic closing stop valve, the surface of the limiting bolt is movably sleeved with a limiting plate, the opposite side of the limiting plate is riveted with a limiting block, and the opposite side of the limiting block is provided with a chamfer.

[0009] In the screw opening and closing type plastic closing stop valve, the top end of the valve rod is sleeved with a hand wheel, the top of the hand wheel is fixedly connected with a second screw, and the bottom end of the second screw penetrates into the inside of the valve rod.

[0010] In the screw opening and closing type plastic closing stop valve, the bottom end of the valve rod penetrates the compression cover, and the two sides of the valve body cavity are provided with sealing rings.

[0011] In the screw opening and closing type plastic closing stop valve, the connecting part of the valve cover and the valve body is provided with a sealing gasket, and the surface of the valve cover is threadedly connected with the inner wall of the valve body.

[0012] Compared with the prior art, the screw opening and closing type plastic closing stop valve has the advantages that the compression cover can be fixed in position, so that it will not fall off when subjected to water pressure impact and frequent opening and closing actions, and the sealing performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a sectional view of the screw opening and closing type plastic closing stop valve.

[0014] Figure 2 is a valve body structure schematic view of the screw opening and closing type plastic closing stop valve.

[0015] Figure 3 is a Figure 1 enlarged view of A in the screw opening and closing type plastic closing stop valve.

[0016] In the figure, 1, valve body; 2, valve cover; 3, valve stem; 4, packing; 5, compression cap; 6, first screw; 7, sealing plate; 8, rubber pad; 9, threaded hole; 10, limiting mechanism; 11, limiting bolt; 12, limiting groove; 13, limiting plate; 14, limiting block; 15, second screw; 16, sealing ring; 17, sealing gasket; 18, hand wheel. DETAILED DESCRIPTION

[0017] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0018] As Figure 1 , Figure 2 and Figure 3 indicated, the screw opening and closing type plastic closing stop valve comprises a valve body 1 and a valve cover 2, the valve cover 2 is internally threadedly connected with a valve stem 3, a packing 4 is arranged between the valve cover 2 and the valve stem 3, a compression cap 5 is arranged through the top of the valve cover 2, a first screw 6 is fixedly connected through the bottom end of the valve stem 3, a sealing plate 7 is fixedly sleeved on the surface of the first screw 6, a rubber pad 8 is fixedly connected to the bottom of the sealing plate 7, threaded holes 9 are formed in the two sides of the valve cover 2, a limiting mechanism 10 is threadedly connected in the inner cavity of the threaded hole 9, the limiting mechanism 10 comprises a limiting bolt 11, and a limiting groove 12 is formed in the top of the surface of the valve cover 2.

[0019] Further, the limiting plate 13 is movably sleeved on the surface of the limiting bolt 11, limiting blocks 14 are riveted to the bottom of the opposite side of the limiting plate 13, and a chamfer is formed in the opposite side of the limiting block 14. A hand wheel 18 is sleeved on the top end of the valve stem 3, a second screw 15 is fixedly connected through the top of the hand wheel 18, and the bottom end of the second screw 15 penetrates into the inner part of the valve stem 3.

[0020] The bottom end of the valve stem 3 penetrates the compression cap 5, and sealing rings 16 are arranged on the two sides of the inner cavity of the valve body 1. A sealing gasket 17 is arranged at the connecting part of the valve cover 2 and the valve body 1, and the surface of the valve cover 2 is threadedly connected with the inner wall of the valve body 1.

[0021] In use, when the compression cap 5 needs to be limited, the limiting bolt 11 is inserted into the inner part of the threaded hole 9, then the limiting bolt 11 is rotated, the limiting bolt 11 drives the limiting plate 13 to move, the limiting block 14 moves into the inner part of the limiting groove 12, then the limiting bolt 11 is tightened, and the limiting operation is completed. Under the action of the limiting plate 13 and the limiting block 14, the valve cover 2 can be limited and treated, so that it cannot fall off. When the valve needs to be closed, the hand wheel 18 is rotated, the hand wheel 18 drives the valve stem 3 to rotate, the valve stem 3 moves downward through the threaded connection with the valve cover 2, the valve stem 3 drives the sealing plate 7 and the rubber pad 8 to move downward, and then the valve is closed.

[0022] What is not described in detail in the specification belongs to the prior art known to those skilled in the art. The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A plastic screw on / off shut-off valve comprising a valve body (1) and a bonnet (2), characterized in that, The inside thread of the valve cover (2) is connected with a valve stem (3), a packing (4) is arranged between the valve cover (2) and the valve stem (3), a compression cover (5) is arranged through the top of the valve cover (2), a first screw (6) is fixedly connected to the bottom end of the valve stem (3), a sealing plate (7) is fixedly sleeved on the surface of the first screw (6), a rubber pad (8) is fixedly connected to the bottom of the sealing plate (7), threaded holes (9) are formed in the two sides of the valve cover (2), a limiting mechanism (10) is threadedly connected in the inner cavity of the threaded hole (9), the limiting mechanism (10) comprises a limiting bolt (11), and a limiting groove (12) is formed in the top surface of the valve cover (2).

2. The screw-to-open plastic shut-off stop valve according to claim 1, characterized in that, The surface of the limiting bolt (11) movably sleeves a limiting plate (13), the bottom of the opposite side of the limiting plate (13) is riveted with a limiting block (14), and the opposite side of the limiting block (14) is provided with a chamfer.

3. The screw-to-open plastic shut-off stop valve according to claim 1, characterized in that, The top end of the valve stem (3) sleeves a hand wheel (18), the top of the hand wheel (18) penetrates and is fixedly connected with a second screw (15), and the bottom end of the second screw (15) penetrates into the inside of the valve stem (3).

4. The screw-to-open plastic shut-off stop valve according to claim 1, characterized in that, The bottom end of the valve stem (3) penetrates the compression cover (5), and the two sides of the inner cavity of the valve body (1) are provided with sealing rings (16).

5. The screw-to-open plastic shut-off stop valve according to claim 1, characterized in that, The connecting part of the valve cover (2) and the valve body (1) is provided with a sealing gasket (17), and the surface of the valve cover (2) is threadedly connected with the inner wall of the valve body (1).

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