Corrugated pipe stop valve with good sealing performance

Abstract

The utility model discloses a corrugated pipe stop valve with good sealing performance, and relates to the field of stop valves. The corrugated pipe stop valve with the good sealing performance comprises a valve body unit and a valve cover unit installed above the valve body unit, the valve body unit comprises a valve body, a valve cover, a valve rod, a valve rod and a valve rod, the bottom end of the valve rod is connected with the valve clack, the top end of the valve rod penetrates through the valve body and the valve cover unit, and the valve rod can drive the valve clack to move vertically; the sealing performance between the valve rod and the valve body is improved through the sealing assembly. According to the corrugated pipe stop valve with the good sealing performance, one section of the valve rod is sealed through the corrugated sealing pipe, the first sealing ring and the second sealing ring, a medium in the valve body is blocked on the outer side of the corrugated sealing pipe, meanwhile, the first sealing ring can move along with the valve rod when the valve rod moves, and therefore normal use of the valve rod cannot be affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stop valve, concretely to a corrugated pipe stop valve with good sealing performance. BACKGROUND

[0002] The working principle of the stop valve is to control the flow of fluid by the movement of the valve disc on the valve seat. The valve disc moves linearly along the center line of the valve seat, changes the distance between the valve disc and the valve seat, and thus changes the cross-sectional area of the flow passage, realizing the control and interruption of flow.

[0003] The movement of the valve disc needs to be driven by the valve stem. In order to operate the valve stem, the top end of the valve stem generally penetrates the valve body and is arranged through the valve cover. Since the valve stem is slidingly arranged between the valve body and the valve cover, there is a communicating gap between the valve stem and the valve body and the valve cover. Even if the valve stem and the valve body and the valve cover are tightly fitted, the medium inside the stop valve may seep out from the gap between the outer wall of the valve stem and the valve body and the valve cover after long-term use. Therefore, the present application provides a corrugated pipe stop valve with good sealing performance. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a corrugated pipe stop valve with good sealing performance, which solves the problem that the medium inside the stop valve may seep out from the gap between the outer wall of the valve stem and the valve body and the valve cover after long-term use.

[0005] To achieve the above purpose, the utility model realizes the following technical scheme: a corrugated pipe stop valve with good sealing performance, comprising a valve body unit and a valve cover unit installed above the valve body unit, the valve body unit comprising:

[0006] a valve body having a valve disc installed inside for closing the valve body;

[0007] a valve stem having a bottom end connected to the valve disc, a top end penetrating the valve body and arranged through the valve cover unit, and being capable of driving the valve disc to move vertically;

[0008] a sealing assembly increasing the sealing performance between the valve stem and the valve body, the sealing assembly comprising:

[0009] a corrugated sealing pipe movably sleeved on the outside of the valve stem;

[0010] a first sealing ring fixedly sleeved on the outside of the valve stem, and one end of the corrugated sealing pipe being fixedly connected with the first sealing ring;

[0011] a second sealing ring fixedly embedded on the inner wall of the valve body and movably sleeved on the outside of the valve stem, and the other end of the corrugated sealing pipe being fixedly connected with the second sealing ring.

[0012] Preferably, the valve body is provided with a valve seat, and the bottom end of the valve disc is tightly abutted against the inner wall of the valve seat.

[0013] Preferably, the valve body is provided with a liquid inlet and a liquid outlet at two ends respectively.

[0014] Preferably, the valve cover unit comprises:

[0015] a valve cover, the top of which is rotationally provided with a nut seat, and the top end of the valve rod is threadedly connected with the inner wall of the nut seat;

[0016] a sealing packing layer, which is arranged between the valve cover and the outer side of the valve rod, and a pressing plate is arranged above the sealing packing layer.

[0017] Preferably, the outer side of the nut seat is fixedly sleeved with a hand wheel.

[0018] Preferably, the outer side of the valve cover is provided with a fixing strip, and the top end of the fixing strip is fixedly connected with the pressing plate through a bolt.

[0019] Preferably, the outer side of the valve cover is provided with a clamping plate, and the clamping plate is movably sleeved on the outer side of the valve rod.

[0020] The utility model discloses a corrugated pipe stop valve that has good sealing performance, which has the following beneficial effects:

[0021] The corrugated pipe stop valve that has good sealing performance can drive the valve disc to move in the valve body by the valve rod, thereby realizing the opening and closing of the valve body. Meanwhile, the sealing assembly is arranged between the valve rod and the valve body, the corrugated sealing pipe, the first sealing ring and the second sealing ring seal one section of the valve rod, thereby blocking the medium in the valve body outside the corrugated sealing pipe. Meanwhile, the first sealing ring can move with the valve rod, thereby not affecting the normal use of the valve rod. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating labor.

[0023] Fig. 1 It is the overall structure of the utility model sectional view;

[0024] Fig. 2 It is the structure sectional view of the valve body unit of the utility model;

[0025] Fig. 3 It is the structure sectional view of the valve cover unit of the utility model.

[0026] In the figure: 1, valve body unit; 11, valve body; 12, valve disc; 13, valve stem; 14, sealing assembly; 141, corrugated sealing tube; 142, first sealing ring; 143, second sealing ring; 15, valve seat; 16, liquid inlet; 17, liquid outlet; 2, valve cover unit; 21, valve cover; 22, nut seat; 23, hand wheel; 24, sealing packing layer; 25, pressing plate; 26, fixing strip; 27, clamping plate. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application is described clearly and completely, obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0028] The embodiments of the present application provide a corrugated pipe stop valve with good sealing, which solves the problem that the medium in the stop valve may seep out from the gap between the outer wall of the valve stem and the valve body and the valve cover after long-term use.

[0029] The valve stem 13 is arranged to drive the valve disc 12 to move in the valve body 11, so that the opening and closing of the valve body 11 can be realized. The sealing assembly 14 is arranged between the valve stem 13 and the valve body 11. The corrugated sealing tube 141, the first sealing ring 142 and the second sealing ring 143 seal one section of the valve stem 13, so that the medium in the valve body 11 is blocked outside the corrugated sealing tube 141. The first sealing ring 142 can move with the valve stem 13, so that the normal use of the valve stem 13 is not affected.

[0030] In order to better understand the above technical scheme, the above technical scheme will be described in detail in combination with the drawings of the specification and specific embodiments.

[0031] Embodiment one

[0032] The embodiments of the present application disclose a corrugated pipe stop valve with good sealing.

[0033] According to the drawings Figs. 1-3 As shown in the drawings, the corrugated pipe stop valve comprises a valve body unit 1 and a valve cover unit 2 installed above the valve body unit 1.

[0034] The valve body 11 is internally provided with a valve disc 12 for closing the valve body 11;

[0035] A valve stem 13, the bottom end of which is connected with the valve disc 12, the top end of the valve stem 13 penetrates through the valve body 11 and is arranged through the valve cover unit 2, and the valve stem 13 can drive the valve disc 12 to move vertically;

[0036] A sealing assembly 14, which increases the sealing between the valve stem 13 and the valve body 11, the sealing assembly 14 comprises:

[0037] A corrugated sealing pipe 141, which is movably sleeved on the outside of the valve stem 13;

[0038] A first sealing ring 142, which is fixedly sleeved on the outside of the valve stem 13, and one end of the corrugated sealing pipe 141 is fixedly connected with the first sealing ring 142;

[0039] A second sealing ring 143, which is fixedly embedded on the inner wall of the valve body 11 and movably sleeved on the outside of the valve stem 13, and the other end of the corrugated sealing pipe 141 is fixedly connected with the second sealing ring 143.

[0040] In use, the valve stem 13 arranged can drive the valve disc 12 to move in the inside of the valve body 11, thereby realizing the opening and closing of the valve body 11, and the sealing assembly 14 arranged between the valve stem 13 and the valve body 11, the corrugated sealing pipe 141, the first sealing ring 142 and the second sealing ring 143 seal a section of the valve stem 13, so that the medium in the inside of the valve body 11 is blocked outside the corrugated sealing pipe 141, and the first sealing ring 142 can move with the valve stem 13, thereby not affecting the normal use of the valve stem 13.

[0041] Further, the valve body 11 is provided with a valve seat 15, and the bottom end of the valve disc 12 is tightly abutted against the inner wall of the valve seat 15.

[0042] Further, the two ends of the valve body 11 are respectively provided with a liquid inlet 16 and a liquid outlet 17.

[0043] The liquid inlet 16 and the liquid outlet 17 are both connected with the inside of the valve body 11, the valve seat 15 is between the liquid inlet 16 and the liquid outlet 17, and the liquid inlet 16 and the liquid outlet 17 can be sealed when the bottom end of the valve disc 12 is tightly abutted against the inner wall of the valve seat 15, and the liquid inlet 16 and the liquid outlet 17 can be connected in communication after the valve disc 12 moves upward and separates from the valve seat 15.

[0044] Embodiment two

[0045] The valve cover unit 2 comprises:

[0046] A valve cover 21, the top of which is rotationally provided with a nut seat 22, and the top end of the valve stem 13 is threadedly connected with the inner wall of the nut seat 22;

[0047] A sealing packing layer 24 is arranged between the valve cover 21 and the outer side of the valve rod 13, and a pressing plate 25 is arranged above the sealing packing layer 24.

[0048] The sealing packing layer 24 can seal the valve cover 21 and the valve rod 13, and the pressing plate 25 can fix the sealing packing layer 24.

[0049] Further, the outer side of the nut seat 22 is fixedly sleeved with a hand wheel 23.

[0050] The hand wheel 23 is arranged to facilitate the rotation of the nut seat 22, and the top end of the valve rod 13 is threadedly connected with the inner wall of the nut seat 22, so that the valve rod 13 can be vertically moved.

[0051] Further, the outer side of the valve cover 21 is provided with a fixing strip 26, and the top end of the fixing strip 26 is fixedly connected with the pressing plate 25 through a bolt.

[0052] The fixing strip 26 is arranged to fix the position of the pressing plate 25 through the bolt.

[0053] Further, the outer side of the valve cover 21 is provided with a clamping plate 27, and the clamping plate 27 is movably sleeved on the outer side of the valve rod 13.

[0054] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A bellows gate valve with good sealing performance, comprising a valve body unit (1) and a valve cover unit (2) mounted above the valve body unit (1), characterized in that, The valve body unit (1) includes: Valve body (11), inside which a valve disc (12) for closing the valve body (11) is installed; The valve stem (13) is connected at its bottom end to the valve disc (12). The top end of the valve stem (13) passes through the valve body (11) and through the valve cover unit (2). The valve stem (13) can drive the valve disc (12) to move vertically. A sealing assembly (14) that increases the sealing between the valve stem (13) and the valve body (11), the sealing assembly (14) comprising: A bellows sealing tube (141) is movably sleeved on the outside of the valve stem (13); The first sealing ring (142) is fixedly sleeved on the outside of the valve stem (13), and one end of the bellows sealing tube (141) is fixedly connected to the first sealing ring (142); The second sealing ring (143) is fixedly embedded in the inner wall of the valve body (11) and movably sleeved on the outer side of the valve stem (13), and the other end of the corrugated sealing tube (141) is fixedly connected to the second sealing ring (143).

2. The bellows stop valve with good sealing performance according to claim 1, characterized in that, The valve body (11) is equipped with a valve seat (15), and the bottom end of the valve disc (12) is tightly abutted against the inner wall of the valve seat (15).

3. The bellows stop valve with good sealing performance according to claim 1, characterized in that, The valve body (11) has an inlet (16) and an outlet (17) at its two ends, respectively.

4. The bellows stop valve with good sealing performance according to claim 1, characterized in that, The valve cover unit (2) includes: The valve cover (21) has a nut seat (22) rotatably mounted on its top, and the top end of the valve stem (13) is threadedly connected to the inner wall of the nut seat (22); A sealing packing layer (24) is disposed between the valve cover (21) and the outside of the valve stem (13), and a pressure plate (25) is installed above the sealing packing layer (24).

5. A bellows stop valve with good sealing performance according to claim 4, characterized in that, A handwheel (23) is fixedly sleeved on the outer side of the nut seat (22).

6. A bellows stop valve with good sealing performance according to claim 4, characterized in that, A fixing strip (26) is installed on the outside of the valve cover (21), and the top end of the fixing strip (26) is fixedly connected to the pressure plate (25) by bolts.

7. A bellows stop valve with good sealing performance according to claim 4, characterized in that, A clamp (27) is installed on the outside of the valve cover (21), and the clamp (27) is movably sleeved on the outside of the valve stem (13).

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