Stop valve with good sealing performance

Abstract

The utility model relates to the technical field of stop valves, in particular to a stop valve with good sealing performance, which comprises a valve body. The top end of the valve body is fixedly connected with the valve deck through a fastening bolt, a valve rod is fixed to the middle of the valve body, the bottom end of the valve rod is fixedly connected with the valve clack, the outer side of the bottom end of the valve clack is sleeved with a sealing ring, inner frames are fixed to a medium inlet and a medium outlet of the valve body respectively, a plate structure with a round hole groove is fixed to the middle of each inner frame, and a sealing ring is fixed to the outer side of a cross block. A circle of sealing edge is fixed to the bottom end of the sealing ring, the inner disc makes contact with the sealing edge, the cross-shaped block is fixed into the sealing ring, a user can fixedly clamp the outer side and the sealing ring, the sealing edge structure is fixed to the inner side of the sealing ring, firstly, the sealing edge structure can be fixedly connected with the cross-shaped block in an interference mode through a notch, and the sealing effect is improved; through the arranged structure of the inner disc and the sealing ring, when a user conducts stopping and plugging, stable contact can be conducted through the inclined face of the inner disc, and stress at the bottom end can be effectively dispersed through the cross-shaped block and is evenly dispersed to the bottom end of the inner disc.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a stop valve with good sealing performance. Background Art

[0002] The stop valve, also known as the gate valve, is a forced sealing valve. Therefore, when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to prevent leakage. When the medium enters the valve from below the valve disc, the resistance that the operating force needs to overcome is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem must be larger, otherwise the valve stem will bend. There are three types of connection methods: flange connection, threaded connection, and welding connection. Since the emergence of self-sealing valves, the medium flow direction of the stop valve has been changed to enter the valve cavity from above the valve disc. At this time, under the action of the medium pressure, the force to close the valve is small, while the force to open the valve is large, and the diameter of the valve stem can be reduced accordingly.

[0003] The stop valves currently on the market are prone to poor sealing inside and outside the valve due to vibration or corrosion and aging, which can easily reduce their service life and increase maintenance costs. Utility Model Content

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the utility model provides a stop valve with good sealing performance, which can effectively solve the problem that the stop valves currently on the market in the prior art are easily prone to vibration or corrosion aging, resulting in poor sealing performance inside and outside the valve, which can easily reduce its service life and increase maintenance costs.

[0006] Technical Solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The utility model provides a stop valve with good sealing performance, comprising a valve body; the top end of the valve body is fixedly connected to the valve cover by fastening bolts, a valve stem is fixed to the middle part of the valve body, the bottom end of the valve stem is fixedly connected to the valve disc, a sealing ring is sleeved on the outer side of the bottom end of the valve disc, an inner frame is fixed to the medium inlet and outlet of the valve body, a plate structure with a circular hole groove is fixed to the middle part of the inner frame, an inner disk is fixed to the bottom end of the valve disc, a cross block is fixed to the bottom end of the inner disk, a sealing ring is fixed to the outer side of the cross block, a circle of sealing edges is fixed to the bottom end of the sealing ring, the inner disk is in contact with the sealing edge, and the cross block is fixed in the sealing ring.

[0009] Furthermore, the inner plate and the sealing edge are both frustum structures that are larger at the top and smaller at the bottom.

[0010] Furthermore, the sealing edge is a circular ring made of soft rubber material, and a notch is provided in the middle of the cross block, and the sealing ring is fixed in the notch.

[0011] Furthermore, the bottom end of the valve stem is fixedly connected to the valve disc via a pin and a nut.

[0012] Furthermore, a platform structure is provided at the top of the sealing ring, and its cross section is a T-shaped structure.

[0013] Furthermore, the middle portion of the cross block is arc-shapedly recessed inwardly to form an arc-shaped groove.

[0014] Beneficial Effects

[0015] Compared with the known public technology, the technical solution provided by the utility model has the following beneficial effects:

[0016] 1. The utility model fixes the inner disc-cross block structure at the bottom end of the valve disc, and the user can fix the outer side with the sealing ring. The sealing edge structure is fixed on the inner side of the sealing ring, which can be fixedly connected with the cross block through the notch to improve the sealing effect.

[0017] 2. In this device, by providing the inner disk and sealing ring structure, the user can achieve stable contact through the inclined surface when performing cut-off sealing, and the cross block can effectively disperse the stress at the bottom and evenly disperse it to the bottom of the inner disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a cross-sectional view of the utility model;

[0021] Figure 3 for Figure 2 The main view of the structure;

[0022] Figure 4 It is a structural schematic diagram of the valve disc and the sealing ring in the utility model.

[0023] The numbers in the figure represent: 1, valve body; 11, inner frame; 2, valve cover; 3, valve stem; 4, fastening bolts; 5, valve disc; 51, inner plate; 52, cross block; 53, sealing ring; 6, sealing ring; 61, sealing edge. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model is further described below in conjunction with embodiments.

[0026] Embodiment: A stop valve with good sealing performance, see the attached Figure 1 -Attached Figure 4 , including a valve body 1; the top of the valve body 1 is fixedly connected to the valve cover 2 by a fastening bolt 4, a valve stem 3 is fixed to the middle of the valve body 1, the bottom end of the valve stem 3 is fixedly connected to the valve disc 5, a sealing ring 6 is sleeved on the outer side of the bottom end of the valve disc 5, the medium inlet and outlet of the valve body 1 are fixed with an inner frame 11, a plate structure with a circular hole groove is fixed in the middle of the inner frame 11, an inner disk 51 is fixed to the bottom end of the valve disc 5, a cross block 52 is fixed to the bottom end of the inner disk 51, a sealing ring 53 is fixed to the outer side of the cross block 52, a circle of sealing edge 61 is fixed to the bottom end of the sealing ring 6, the inner disk 51 contacts the sealing edge 61, and the cross block 52 is fixed in the sealing ring 6; by fixing the inner disk 51-cross block 52 structure at the bottom end of the valve disc 5, the user can fix the outer side with the sealing ring 6, and the sealing edge 61 structure fixed to the inner side of the sealing ring 6 can first be fixedly connected with the cross block 52 through the missing groove to improve the sealing effect.

[0027] The inner plate 51 and the sealing edge 61 are both truncated cone structures that are larger at the top and smaller at the bottom. The sealing edge 61 is a circular ring made of soft rubber material, and a groove is provided in the middle of the cross block 52, in which the sealing ring 6 is fixed. The bottom end of the valve stem 3 is fixedly connected to the valve disc 5 by a pin and a nut. The top of the sealing ring 6 is provided with a table structure, and its cross-section is a T-shaped structure. The middle part of the cross block 52 is arc-shaped and recessed inward to form an arc-shaped groove. Through the inner plate 51 and the sealing ring 6 structure, the user can make stable contact through the inclined surface when performing cut-off sealing, and the cross block 52 can effectively disperse the stress at the bottom and evenly disperse it to the bottom of the inner plate 51.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. These modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stop valve with good sealing performance, characterized in that: The invention comprises a valve body (1); the top end of the valve body (1) is fixedly connected to the valve cover (2) by means of a fastening bolt (4); a valve stem (3) is fixedly connected to the middle part of the valve body (1); the bottom end of the valve stem (3) is fixedly connected to the valve disc (5); a sealing ring (6) is sleeved on the outer side of the bottom end of the valve disc (5); the medium inlet and outlet of the valve body (1) are both fixedly provided with an inner frame (11); a plate structure with a circular hole groove is fixedly provided in the middle part of the inner frame (11); an inner plate (51) is fixedly provided at the bottom end of the valve disc (5); a cross block (52) is fixedly provided at the bottom end of the inner plate (51); a sealing ring (53) is fixedly provided on the outer side of the cross block (52); a sealing edge (61) is fixedly provided at the bottom end of the sealing ring (6); the inner plate (51) is in contact with the sealing edge (61); and the cross block (52) is fixed inside the sealing ring (6).

2. A stop valve with good sealing performance according to claim 1, characterized in that: The inner plate (51) and the sealing edge (61) are both truncated cone structures that are larger at the top and smaller at the bottom.

3. A stop valve with good sealing performance according to claim 1, characterized in that: The sealing edge (61) is a circular ring made of soft rubber material, and a notch is provided in the middle of the cross block (52), and the sealing ring (6) is fixed in the notch.

4. A stop valve with good sealing performance according to claim 1, characterized in that: The bottom end of the valve stem (3) is fixedly connected to the valve flap (5) via a pin and a nut.

5. A stop valve with good sealing performance according to claim 4, characterized in that: The top end of the sealing ring (6) is provided with a platform structure, the cross section of which is a T-shaped structure.

6. A stop valve with good sealing performance according to claim 1, characterized in that: The middle part of the cross block (52) is arc-shapedly recessed inwards to form an arc-shaped groove.

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