Cast steel stop valve

Abstract

The utility model relates to the technical field of stop valves, and discloses a cast steel stop valve which comprises a valve body, a valve rod and a valve element assembly, the valve element assembly is installed at the bottom of the valve rod and located in the valve body, a valve deck and a support are further arranged on the valve body, and the valve rod is matched with the valve deck and the support. The valve element assembly comprises an inner valve sleeve and an outer valve sleeve, the inner valve sleeve slides on the valve rod, the outer valve sleeve is arranged on the inner valve sleeve in a sleeved mode, and a sealing ring is arranged on the inner valve sleeve. The sealing ring is tightly attached to the inner wall of the outer side of the inclined face of the valve body through impact of water flow, the sealing ring is similar to a thin film to be attached to the inner wall of the valve body, and therefore the sealing performance of the valve is improved, liquid is prevented from leaking from the connecting position of the valve body and the valve cover when the valve is opened, and the larger the impact force of the water flow is, the better the sealing performance is.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stop valve, concretely is a cast steel stop valve. BACKGROUND

[0002] The cast steel stop valve is a kind of stop valve manufactured using cast steel material.The stop valve is a commonly used cut-off valve, and can also be used as a throttle valve, mainly used to connect or cut off medium in pipeline.The cast steel stop valve is mainly composed of valve body, valve cover, valve clapper, valve stem, sealing washer and other parts.The valve body and valve cover are usually cast from cast steel material, having good strength and corrosion resistance.

[0003] However, during the use of the stop valve, especially in the open state of the valve, the sealing performance of the valve is poor due to the large water flow impact force, so that the liquid in the valve leaks out. UTILITY MODEL CONTENTS

[0004] To solve the above problems in the prior art, the utility model provides a cast steel stop valve, which has the advantage of being able to seal under high impact.

[0005] To achieve the above-mentioned purpose of sealing under high impact, the utility model provides the following technical scheme: a valve body, a valve stem and a valve core assembly are provided, the valve core assembly is installed at the bottom of the valve stem and located inside the valve body, a valve cover and a bracket are further provided on the valve body, and the valve stem cooperates with the valve cover and the bracket.

[0006] The valve core assembly includes an inner valve sleeve and an outer valve sleeve, the inner valve sleeve slides on the valve stem, the outer valve sleeve is sleeved on the inner valve sleeve, a sealing ring is provided on the inner valve sleeve, and the diameter length of the sealing ring is greater than the diameter length of the outer valve sleeve.

[0007] Preferably, the inner valve sleeve slides on the valve stem, and the bottom of the inner valve sleeve abuts against the valve stem, an inner bevel is provided on the upper side edge of the inner valve sleeve, and a sliding ring is provided on the outer periphery of the bottom of the inner valve sleeve.

[0008] Preferably, an outer bevel is provided on the lower end face of the outer valve sleeve, a sliding groove is provided in the inner part of the outer valve sleeve, the sliding ring slides in the sliding groove, and the bottom of the valve stem abuts against the inner part of the outer valve sleeve.

[0009] Preferably, one edge of the valve body is provided as a valve body bevel, a flow-through hole is further provided in the valve body, the inner bevel abuts against the valve body bevel, the outer valve sleeve cooperates with the flow-through hole to complete the opening and closing of the valve.

[0010] Preferably, the materials of the inner bevel, the sealing ring and the outer bevel are all rubber.

[0011] Preferably, a sealing sleeve is further sleeved on the outer circumferential side of the valve rod, and the sealing sleeve is located at the position where the valve cover and the valve body are connected and abuts against the valve body and the valve cover.

[0012] Preferably, the bracket is fixed on the valve cover, the valve cover and the valve body are connected through bolts, and the valve rod is provided with a plurality of threads which are threadedly connected with the bracket and slidingly connected with the valve cover.

[0013] Preferably, a handle is further mounted on the top of the valve rod.

[0014] Compared with the prior art, the cast steel stop valve has the following beneficial effects:

[0015] 1. When the valve is opened, the inner valve sleeve drives the sealing ring to move integrally on the inner wall of the valve body, the sealing ring is tightly attached to the outer wall of the inclined surface of the valve body through the impact of water flow, and the sealing ring is attached to the inner wall of the valve body, so that the sealing property of the valve is increased, and liquid leakage from the connection between the valve body and the valve cover is avoided.

[0016] 2. The cast steel stop valve is provided with a sliding ring which slides in a sliding groove, so that when the valve is half opened, the water flow can still drive the inner inclined angle to move upward, and the sealing ring is attached to the inner wall of the valve body, so that the sealing effect of the sealing ring can be achieved in any state of the valve.

[0017] 3. The cast steel stop valve is provided with a valve cover and a valve body, the sealing sleeve can be extruded to completely seal the connection between the valve cover and the valve body, a first resealing is achieved, then when the valve is opened, the inner inclined angle on the inner valve sleeve is abutted to the inclined surface of the valve body through the valve rod, a second resealing is formed, the sealing ring is attached to the inner wall of the valve body through the impact of water flow, and a third resealing is formed, so that the sealing property of the valve is greatly increased through the three resealings when the valve is opened, and liquid leakage is effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0019] Figure 2 It is an internal half-section structure schematic view of the utility model;

[0020] Figure 3 It is a structure schematic view of the utility model Figure 2 It is an enlarged structure schematic view of position A of the utility model;

[0021] Figure 4 It is a structure schematic view of the valve core assembly of the utility model;

[0022] Figure 5The utility model discloses a valve core assembly part explosion structure schematic view.

[0023] In the drawing: 10, valve body; 101, flow-through hole; 102, valve body bevel; 11, valve cover; 12, support; 13, handle; 20, valve rod; 201, sealing sleeve; 202, inner valve sleeve; 2021, inner bevel angle; 2022, sealing ring; 2023, slip ring; 203, outer valve sleeve; 2031, outer bevel angle; 2032, sliding groove. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor fall within the protection scope of the utility model.

[0025] As Figures 1-5 Shown, including valve body 10, valve rod 20 and valve core assembly, valve core assembly installs at the bottom of valve rod 20, and is located inside valve body 10, still be equipped with valve cover 11 and support 12 on valve body 10, and valve rod 20 is cooperated with valve cover 11 and support 12, support 12 is fixed on valve cover 11, and valve cover 11 is connected through bolt between valve body 10, is provided with a plurality of threads on valve rod 20, and is connected with support 12 threadedly, and is connected with valve cover 11 slidingly, and through valve rod 20 control valve core assembly moves up and down, is used for opening and closing valve, and still installs handle 13 on the top of valve rod 20, and water outlet and water inlet are seted up in valve body 10, and still set up flow-through hole 101 in valve body 10, wherein flow-through hole 101 is communicated with water inlet and water outlet, wherein the water inlet is located below flow-through hole 101, and the water outlet is located above it;

[0026] The valve core assembly comprises an inner valve sleeve 202 and an outer valve sleeve 203, wherein the inner valve sleeve 202 is sleeved on the valve rod 20 or fixed on the valve rod 20 to form an integral body, the outer valve sleeve 203 is sleeved on the inner valve sleeve 202, the inner valve sleeve 202 is provided with a sealing ring 2022, the diameter of the sealing ring 2022 is greater than the diameter of the outer valve sleeve 203, the inner valve sleeve 202 is sleeved on the valve rod 20 and abuts against the valve rod 20 at the bottom, the upper side of the inner valve sleeve 202 is provided with an inner inclined angle 2021, the outer periphery of the bottom of the inner valve sleeve 202 is provided with a sliding ring 2023, the lower side of the outer valve sleeve 203 is provided with an outer inclined angle 2031, the inner valve sleeve 203 is provided with a sliding groove 2032, the sliding ring 2023 is sleeved in the sliding groove 2032, the bottom of the valve rod 20 abuts against the inner part of the outer valve sleeve 203, the materials of the inner inclined angle 2021, the sealing ring 2022 and the outer inclined angle 2031 are all rubber, wherein the sealing ring 2022 is a hollow inverted table type and has a small thickness, when the valve is opened, the inner valve sleeve 202 drives the sealing ring 2022 to move to the inner wall of the valve body 10 as a whole, the sealing ring 2022 is tightly attached to the inner wall of the valve body 102 under the impact of the water flow, and the sealing ring 2022 is attached to the inner wall of the valve body 10 like a film, so that the sealing performance of the valve is improved, and the liquid is prevented from leaking from the connection between the valve body 10 and the valve cover 11, and the greater the impact of the water flow, the better the sealing performance, and the sliding ring 2023 is sleeved in the sliding groove 2032, so that the inner inclined angle 2021 can be driven to move upward under the impact of the water flow when the valve is half opened, and the sealing ring 2022 is attached to the inner wall of the valve body 10, so that the sealing ring 2022 can achieve the sealing effect in any state of the valve.

[0027] One edge of the valve body 10 is provided with a valve body inclined surface 102, the inner inclined angle 2021 abuts against the valve body inclined surface 102, the outer valve sleeve 203 cooperates with the flow-through hole 101 to open and close the valve, and the outer periphery of the valve rod 20 is further sleeved with a sealing sleeve 201, the sealing sleeve 201 is located at the position where the valve cover 11 and the valve body 10 are connected and abuts against the valve body 10 and the valve cover 11, the valve cover 11 and the valve body 10 are installed to extrude the sealing sleeve 201, so that the sealing sleeve 201 can completely seal the connection between the valve body 10 and the valve cover 11 to achieve the first resealing, then the inner inclined angle 2021 on the inner valve sleeve 202 abuts against the valve body inclined surface 102 to form the second resealing when the valve is opened, the sealing ring 2022 is attached to the inner wall of the valve body 10 under the impact of the water flow to form the third resealing, and the three resealings can greatly improve the sealing performance of the valve when the valve is opened, so that the liquid is effectively prevented from leaking.

[0028] Working principle: in use, when the valve needs to be opened, the handle 13 is rotated to rotate the valve stem 20, which is limited by its own threads, and moves upward so that the valve stem 20 does not abut against the outer valve sleeve 203. Water flow can impact the outer valve sleeve 203 to open the flow-through hole 101. Continue to rotate the handle 13 until the valve is fully opened. When the valve is fully opened, the inner inclined angle 2021 on the inner valve sleeve 202 abuts against the inclined surface 102 of the valve body. At this time, under the impact of water flow, the sealing ring 2022 tightly adheres to the side wall of the outer periphery of the inclined surface 102 of the valve body, i.e. the inner wall of the valve body 10. The greater the impact force of the water flow, the tighter the sealing ring 2022 adheres, and the better the sealing performance.

[0029] When the valve is in a half-open state, water flow will impact the inner valve sleeve 202 to make it slide upward so that the inner inclined angle 2021 abuts against the inclined surface 102 of the valve body. At this time, the sealing ring 2022 can also adhere to the inner wall of the valve body 10 to complete the sealing.

[0030] When the valve is closed, the handle 13 needs to be rotated to move the valve stem 20 downward to push the outer valve sleeve 203 downward. When the outer valve sleeve 203 moves to abut against the inner valve sleeve 202, it drives the inner valve sleeve 202 to abut against the valve body 10 until the outer inclined angle 2031 abuts against the flow-through hole 101 to complete the sealing and close the valve.

[0031] In summary, the cast steel stop valve, when the valve is opened, moves the inner valve sleeve 202 and the sealing ring 2022 as a whole to the inner wall of the valve body 10. Through the impact of water flow, the sealing ring 2022 tightly adheres to the inner wall outside the inclined surface 102 of the valve body, which is similar to a film adhering to the inner wall of the valve body 10, thereby increasing the sealing performance of the valve. When the valve is opened, liquid will not leak from the connection between the valve body 10 and the valve cover 11. Moreover, the greater the impact force of the water flow, the better the sealing performance. Through the sliding ring 2023 sliding in the sliding groove 2032, when the valve is half-open, water flow can still push the inner inclined angle 2021 upward to make the sealing ring 2022 adhere to the inner wall of the valve body 10. Therefore, the sealing ring 2022 can complete the sealing effect in any state of the valve. Through the installation of the valve cover 11 and the valve body 10, the sealing sleeve 201 can be squeezed to completely seal the connection between the two, achieving the first resealing. Then, when the valve is opened, the inner inclined angle 2021 on the inner valve sleeve 202 abuts against the inclined surface 102 of the valve body to form the second resealing. Water flow impacts the sealing ring 2022 to make it adhere to the inner wall of the valve body 10, which can form the third resealing. When the valve is opened, the three resealings can greatly increase the sealing performance of the valve, effectively preventing liquid from leaking.

[0032] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it is intended to be limited only by the words recited in the appended claims. The scope of the present application shall be limited only by the claims.

[0033] While the embodiments of the present application have been shown and described with respect to particular embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application. Therefore, the scope of the application should not be limited by the embodiments, but should be defined only in accordance with the following claims and their equivalents.

Claims

1. A cast steel globe valve comprising a valve body (10), a valve stem (20) and a valve trim assembly, characterized by: The valve core assembly is installed at the bottom of the valve rod (20) and inside the valve body (10), and the valve body (10) is further provided with a valve cover (11) and a bracket (12), and the valve rod (20) cooperates with the valve cover (11) and the bracket (12). The valve core assembly comprises an inner valve sleeve (202) and an outer valve sleeve (203), wherein the inner valve sleeve (202) slides on the valve rod (20), the outer valve sleeve (203) is sleeved on the inner valve sleeve (202), and the inner valve sleeve (202) is provided with a sealing ring (2022), and the diameter length of the sealing ring (2022) is greater than the diameter length of the outer valve sleeve (203).

2. A cast steel globe valve according to claim 1, characterized in that: The inner valve sleeve (202) slides on the valve rod (20) and abuts against the valve rod (20) at the bottom, and the upper side edge of the inner valve sleeve (202) is provided with an inner bevel (2021), and the outer periphery of the bottom of the inner valve sleeve (202) is provided with a sliding ring (2023).

3. A cast steel globe valve according to claim 2, characterized in that: The lower side end surface of the outer valve sleeve (203) is provided with an outer bevel (2031), the outer valve sleeve (203) is provided with a sliding groove (2032) inside, the sliding ring (2023) slides in the sliding groove (2032), and the bottom of the valve rod (20) abuts against the inside of the outer valve sleeve (203).

4. A cast steel globe valve according to claim 2, characterized in that: One edge inside the valve body (10) is provided as a valve body bevel (102), the valve body (10) is further provided with a flow-through hole (101), the inner bevel (2021) abuts against the valve body bevel (102), the outer valve sleeve (203) cooperates with the flow-through hole (101) to complete the opening and closing of the valve.

5. A cast steel globe valve according to claim 3, characterized in that: The materials at the inner bevel (2021), the sealing ring (2022) and the outer bevel (2031) are all rubber.

6. A cast steel globe valve according to claim 1, characterized in that: The outer periphery of the valve rod (20) is further sleeved with a sealing sleeve (201), the sealing sleeve (201) is located at the position where the valve cover (11) and the valve body (10) are connected, and abuts against the valve body (10) and the valve cover (11).

7. A cast steel globe valve according to claim 1, characterized in that: The bracket (12) is fixed on the valve cover (11), the valve cover (11) and the valve body (10) are connected through bolts, the valve rod (20) is provided with a plurality of threads, and is threadedly connected with the bracket (12) and is slidingly connected with the valve cover (11).

8. A cast steel globe valve according to claim 1, characterized in that: The top of the valve rod (20) is further provided with a handle (13).

Images