Stop valve with high sealing performance

Abstract

The utility model provides a stop valve with high sealing performance, and belongs to the technical field of valves. The high-sealing-performance stop valve comprises a valve body, a first valve element is arranged in the valve body, a valve rod is installed on the first valve element, the valve rod penetrates through the valve body to the outside, and a sealing assembly is further installed on the first valve element; the sealing assembly comprises a sliding rod sliding in the first valve element, a second valve element is fixed to the end face of the side, away from the first valve element, of the sliding rod, and the sliding rod is connected with the inner wall of the first valve element through a spring. And after the communicating water channel is filled with permeated water flow, a water sealing effect can be formed in the communicating water channel, and therefore the sealing performance is further improved.

Description

Technical Field

[0001] The utility model belongs to the field of valves, and in particular relates to a high-sealing stop valve. 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 large, otherwise the valve stem will bend.

[0003] After the stop valve is closed, seepage is inevitable at its valve core, resulting in water leakage, especially after long-term use. Because it is a single-layer seal, the water leakage will be more serious after this layer of seal is damaged. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a high-sealing stop valve.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-sealing stop valve, including a valve body, characterized in that: a first valve core is provided inside the valve body, a valve stem is installed on the first valve core, the valve stem penetrates the valve body to the outside, and a sealing component is also installed on the first valve core;

[0006] The sealing assembly includes a sliding rod sliding in the first valve core, a second valve core is fixed to an end surface of the sliding rod away from the first valve core, and the sliding rod is connected to an inner wall of the first valve core via a spring.

[0007] Optionally, a water inlet channel and a water outlet channel are provided in the valve body, and the water inlet channel and the water outlet channel are connected with each other through a connecting water channel.

[0008] Optionally, the first valve core is divided into a sealing part and an extension part, wherein the sealing part is located in the water inlet channel, the valve stem is threadedly connected in the sealing part of the first valve core, the extension part of the first valve core is located in the connecting water channel, a slide groove is provided in the extension part, the slide groove is square, the slide rod slides in the slide groove, and a spring is installed in the slide groove.

[0009] Optionally, the sliding rod is square in shape, and the side end surface of the second valve core is inclined, and rubber coating is applied on the inclined surface.

[0010] Optionally, a swivel is mounted on the outer portion of the valve stem.

[0011] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. Due to the setting of the sealing component, the second valve core can be set to form a double sealing effect of the valve, thereby increasing the sealing performance of the valve. When the connecting water channel is filled with the infiltrated water flow, a water seal effect will be formed in the connecting water channel, thereby further increasing the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional diagram of the utility model.

[0014] Figure 2 It is the front view of the utility model.

[0015] 10. Valve body; 11. Valve stem; 12. Swivel; 13. Water inlet channel; 14. Water outlet channel; 15. Connecting water channel; 16. First valve core; 17. Slide groove; 18. Second valve core; 19. Slide rod. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention.

[0017] As shown in Figures 1 and 2, a high-sealing stop valve includes a valve body 10, which is characterized in that a first valve core 16 is provided inside the valve body 10, a valve stem 11 is installed on the first valve core 16, the valve stem 11 penetrates the valve body 10 to the outside, a swivel 12 is installed on the external part of the valve stem 11, and a sealing assembly is also installed on the first valve core 16, the sealing assembly includes a slide rod 19 sliding in the first valve core 16, a second valve core 18 is fixed to the end face of the slide rod 19 away from the first valve core 16, the slide rod 19 is connected to the inner wall of the first valve core 16 by a spring, the slide rod 19 is square, and the side end face of the second valve core 18 is inclined, and rubber coating is applied on the inclined surface.

[0018] A water inlet channel 13 and a water outlet channel 14 are provided in the valve body 10, and the water inlet channel 13 and the water outlet channel 14 are connected via a connecting water channel 15. The first valve core 16 is divided into a sealing part and an extension part, wherein the sealing part is located in the water inlet channel 13, the valve stem 11 is threadedly connected in the sealing part of the first valve core 16, and the extension part of the first valve core 16 is located in the connecting water channel 15, and a slide groove 17 is provided in the extension part. The slide groove 17 is square in shape, and the slide rod 19 slides in the slide groove 17, and the spring is installed in the slide groove 17.

[0019] When in use, when the valve is opened, the swivel 12 is rotated to drive the valve stem 11 to rotate. The rotation of the valve stem 11 will drive the first valve core 16 to move upward. Then, since the second valve core 18 abuts against the valve body 10, the spring is in a stretched state. At this time, the impact of the water flow is greater than the tension of the spring, which can drive the second valve core 18 to further stretch the spring, so that the connecting waterway 15 is completely opened, and the water flow can flow through the stop valve. When the valve is closed, the swivel 12 is rotated in the opposite direction to drive the first valve core 16 through the valve stem 11. Move downward and abut against the inner wall of the connecting water channel 15 to close the valve. At this time, the second valve core 18 is also driven by the tension of the spring to abut against the inner wall of the connecting water channel 15. At this time, the connecting water channel 15 is completely sealed. When a small amount of water penetrates from the first valve core 16, it will also be blocked by the second valve core 18. When the connecting water channel 15 is filled with the infiltrated water, its weight is less than the tension of the spring. At this time, the water flow in the connecting water channel 15 will form a water seal effect, thereby making it more sealed.

[0020] Obviously, the described embodiments are only a part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A high-sealing stop valve, comprising a valve body (10), characterized in that: A first valve core (16) is provided inside the valve body (10), a valve stem (11) is installed on the first valve core (16), the valve stem (11) penetrates the valve body (10) to the outside, and a sealing component is also installed on the first valve core (16); The sealing assembly includes a slide rod (19) sliding in the first valve core (16); a second valve core (18) is fixed to an end surface of the slide rod (19) away from the first valve core (16); and the slide rod (19) is connected to an inner wall of the first valve core (16) via a spring.

2. A high sealing stop valve according to claim 1, characterized in that: A water inlet channel (13) and a water outlet channel (14) are provided in the valve body (10), and the water inlet channel (13) and the water outlet channel (14) are connected via a connecting water channel (15).

3. A high sealing stop valve according to claim 2, characterized in that: The first valve core (16) is divided into a sealing part and an extension part, wherein the sealing part is located in the water inlet channel (13), the valve stem (11) is threadedly connected to the sealing part of the first valve core (16), the extension part of the first valve core (16) is located in the connecting water channel (15), a slide groove (17) is provided in the extension part, the slide groove (17) is square, the slide rod (19) slides in the slide groove (17), and a spring is installed in the slide groove (17).

4. A high sealing stop valve according to claim 1, characterized in that: The sliding rod (19) is in a square shape, and the side end surface of the second valve core (18) is in an inclined surface, and a rubber coating is applied on the inclined surface.

5. A high sealing stop valve according to claim 1, characterized in that: A swivel ring (12) is mounted on the outer portion of the valve stem (11).

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