Durable stop valve

Abstract

The utility model relates to the technical field of stop valves, in particular to a durable stop valve which comprises a valve body, a water inlet and a water outlet, a mounting cavity is formed in the valve body, a valve seat is arranged in the mounting cavity, a valve clack is arranged in the mounting cavity, a fixing frame is arranged on the valve body, a driving mechanism is arranged on the fixing frame, and the valve clack and the valve seat are coaxially arranged. A filtering mechanism is coaxially arranged at the bottom of the valve clack; the filter cartridge is coaxially arranged at the bottom of the valve clack, a medium enters the mounting cavity of the valve body, impurities mixed in the medium are intercepted by the filter cartridge, the impurities are prevented from being left at the water outlet along with the medium through the through hole of the valve seat, the impurities are prevented from being accumulated on the contact surface of the valve clack and the valve seat, and the service life of the valve is prolonged; meanwhile, impurities in the medium are filtered and intercepted, the plug is taken down from the impurity outlet by rotating the plug, and the impurities accumulated at the bottom of the valve body are discharged, so that the impurities accumulated at the bottom of the valve body are prevented from polluting the subsequent medium.

Description

Technical Field

[0001] The present application relates to the field of stop valves, and in particular to a durable stop valve. Background Art

[0002] The globe valve, also called the stop valve, is one of the most widely used valves. It is popular because of the small friction between the sealing surfaces during opening and closing, the durability, the small opening height, the easy manufacturing and maintenance, and it is suitable not only for medium and low pressure, but also for high pressure. The closing principle of the globe valve is to rely on the valve stem pressure to make the valve disc sealing surface fit closely with the valve seat sealing surface to prevent the flow of the medium;

[0003] Referring to the Chinese patent application with publication number CN109139938A, a stop valve is disclosed, which adopts a buffer component, thereby protecting the bottom of the valve disc from the impact of the medium, extending the service life of the valve disc, and thus extending the service life of the present invention. The bottom of the buffer component is provided with an annular intercepting tooth, thereby further preventing the valve disc from being damaged due to excessive pressure. By providing a first sealing ring and a second sealing ring, leakage of the medium is prevented. The provision of the buffer component reduces the damage of the medium to the first sealing ring and the second sealing ring, further improves the sealing performance, and reduces the leakage of the medium.

[0004] However, when the medium in the existing pipeline circulates, since there are usually impurities in the medium, when it passes through the valve body, the impurities contained in the medium may accumulate on the contact surface between the valve disc and the valve seat, which will affect the normal use of the valve; for this reason, we have designed a durable stop valve. Summary of the invention

[0005] The embodiment of the present application provides a durable stop valve that can filter impurities contained in the medium to prevent the impurities from adhering to the contact surface between the valve disc and the valve seat, while at the same time removing the impurities retained at the bottom of the valve body through the impurity outlet at the bottom of the valve body.

[0006] The embodiment of the present application provides a durable stop valve, comprising: a valve body, a water inlet and a water outlet, flange connection plates are provided at both ends of the valve body, a mounting cavity is provided in the valve body, a valve seat is provided in the mounting cavity, a valve disc is provided in the mounting cavity, a fixing frame is provided on the valve body, a driving mechanism is provided on the fixing frame, the valve disc is coaxially arranged with the valve seat, and a filtering mechanism is coaxially provided at the bottom of the valve disc;

[0007] By connecting the flange connecting plates at both ends of the valve body with the transport pipeline, since the nut seat is fixed on the valve body through a fixing frame, when the handwheel is turned to rotate the screw, the screw drives the valve stem and the valve disc at the bottom of the valve stem to move up and down in the installation cavity of the valve body, and the full closing and opening of the pipeline are achieved through the sealing and separation of the valve disc and the valve seat. The medium enters the installation cavity of the valve body, and the impurities contained therein are intercepted by the filter cartridge to prevent the impurities from passing through the through hole of the valve seat with the medium and remaining in the water outlet.

[0008] The above technical solutions in the embodiments of the present application have at least the following technical effects:

[0009] 1. The present application provides a filter cartridge coaxially at the bottom of the valve disc. The medium enters the installation cavity of the valve body, and the impurities contained therein are intercepted by the filter cartridge, so as to prevent the impurities from passing through the through hole of the valve seat with the medium to the water outlet, and to prevent the impurities from accumulating on the contact surface of the valve disc and the valve seat, thereby improving the service life of the valve.

[0010] 2. The present application provides an outlet at the bottom of the valve body, and the plug is threadedly connected to the outlet. The sealing performance between the plug and the outlet is increased by arranging a sealing ring and a sealing gasket. A screw groove or a lifting ring is provided at the end of the plug away from the valve body, so that the staff can open the plug and flush the installation cavity of the valve body to discharge the impurities accumulated at the bottom of the valve body, thereby preventing the impurities accumulated at the bottom of the valve body from contaminating the subsequent medium. The operation is simple and convenient.

[0011] In some embodiments, the driving mechanism includes a screw rod for driving the valve disc to close and separate from the valve seat, and the driving mechanism also includes a nut seat and a handwheel, the nut seat is arranged on a fixing frame, a threaded hole is opened on the nut seat, a threaded hole is provided in the threaded hole with a thread matching the screw rod, the screw rod is coaxially inserted in the threaded hole, one end of the screw rod is coaxially fixedly connected to the handwheel, and the other end is coaxially fixedly connected to the valve stem, and the end of the valve stem away from the screw rod is coaxially fixedly connected to the valve disc;

[0012] By adopting the above technical solution, the screw is rotated by turning the handwheel. Since a threaded hole is provided on the nut seat, a threaded hole is provided with a thread matching the screw. Through the cooperation of the screw and the nut seat, the screw drives the valve stem and the valve disc at the bottom of the valve stem to move up and down in the installation cavity of the valve body. The full closing and opening of the pipeline is achieved through the closure and separation of the valve disc and the valve seat.

[0013] In some embodiments, a filter mechanism is coaxially disposed at the bottom of the valve disc, and the filter mechanism is used to prevent impurities in the medium from accumulating on the contact surface between the valve disc and the valve seat;

[0014] The filter mechanism comprises a filter cartridge, the filter cartridge is coaxially arranged at the bottom of the valve disc, the outer wall of the filter cartridge contacts the inner wall of the valve seat, the limit plate is coaxially arranged at the bottom of the filter cartridge, and the limit plate is provided with a filter plate;

[0015] By adopting the above technical solution, since a filter cartridge is coaxially provided at the bottom of the valve disc, when the medium enters the installation cavity of the valve body, impurities contained therein are intercepted by the filter cartridge, preventing the impurities from passing through the through hole of the valve seat with the medium to the water outlet, and preventing the impurities from accumulating on the contact surface of the valve disc and the valve seat.

[0016] In some embodiments, an annular scraper is provided at one end of the valve seat close to the filter cartridge;

[0017] By adopting the above technical solution, since the filter cartridge is coaxially arranged at the bottom of the valve disc and the outer wall of the filter cartridge is in contact with the inner wall of the valve seat, when the screw drives the valve stem and the valve disc at the bottom of the valve stem to move up and down in the installation cavity of the valve body, the annular scraper will drop the impurities adhered to the outer wall of the filter cartridge to the bottom of the valve body.

[0018] In some embodiments, a discharge port is provided at the bottom of the valve body, a sealing gasket is provided on the outer ring of the discharge port outside the valve body, a sealing ring is provided at one end of the discharge port located in the installation cavity, and a plug is provided inside the discharge port.

[0019] By adopting the above technical solution, the plug is threadedly connected to the outlet, a sealing ring is provided at one end of the outlet located in the installation cavity, and a sealing gasket is provided at the outer ring of the outlet located outside the valve body. The sealing ring and the sealing gasket are provided to increase the sealing performance between the plug and the outlet, and a screw groove or a lifting ring is provided at one end of the plug away from the valve body to facilitate the staff to open the plug;

[0020] Optionally, flushing into the installation cavity of the valve body facilitates the discharge of impurities accumulated at the bottom of the valve body, thereby preventing the impurities accumulated at the bottom of the valve body from contaminating subsequent media, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A schematic diagram of the structure of a durable stop valve provided in an embodiment of the present application;

[0023] Figure 2 A front view of a durable stop valve provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the left and right isometric angles of a durable stop valve provided in an embodiment of the present application;

[0025] Figure 4 A side view of a durable stop valve provided in an embodiment of the present application;

[0026] Figure 5 for Figure 4 Cross-sectional view along the AA direction.

[0027] Among them, the reference numerals in the figure are:

[0028] 1. Valve body; 2. Flange connection plate; 3. Water inlet; 4. Water outlet; 5. Fixed bracket; 6. Nut seat; 7. Screw; 8. Valve stem; 9. Valve disc; 10. Handwheel; 11. Sealing gasket; 12. Plug; 13. Filter cartridge; 14. Limit plate; 15. Sealing ring; 16. Valve seat. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0035] It should be noted that, in the present application, words such as "in the present embodiment", "exemplarily", "for example", etc. are used to indicate examples, illustrations or explanations. Any embodiment or design described in the present application as "in the present embodiment", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in the present embodiment", "exemplarily", "for example", etc. is intended to present related concepts in a concrete way, meaning that specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] The globe valve, also called the stop valve, is one of the most widely used valves. It is popular because of the small friction between the sealing surfaces during opening and closing, the durability, the small opening height, the easy manufacturing and maintenance, and it is suitable not only for medium and low pressure, but also for high pressure. The closing principle of the globe valve is to rely on the valve stem pressure to make the valve disc sealing surface fit closely with the valve seat sealing surface to prevent the flow of the medium.

[0037] The stop valve in the related art adopts a buffer component, thereby protecting the bottom of the valve disc from the impact of the medium, extending the service life of the valve disc, and thus extending the service life of the present invention. An annular flow-cutting tooth is arranged at the bottom of the buffer component, thereby further preventing the valve disc from being damaged due to excessive pressure.

[0038] Based on this, in order to improve the problem in the related art that impurities contained in the medium may accumulate on the contact surface of the valve disc and the valve seat, causing valve leakage, the embodiment of the present application provides the following solution.

[0039] See also Figures 1 to 5A durable stop valve comprises: a valve body 1, a water inlet 3 and a water outlet 4, both ends of the valve body 1 are provided with flange connection plates 2, a mounting cavity is provided in the valve body 1, a valve seat 16 is provided in the mounting cavity, a valve disc 9 is provided in the mounting cavity, a fixing frame 5 is provided on the valve body 1, and a driving mechanism is provided on the fixing frame 5, and the driving mechanism is used to drive the valve disc 9 to close and separate from the valve seat 16, so as to realize full closing and full opening of the pipeline;

[0040] The driving mechanism includes a screw rod 7, which also includes a nut seat 6 and a hand wheel 10. The nut seat 6 is arranged on the fixing frame 5. A threaded hole is provided on the nut seat 6. A threaded hole is provided in the threaded hole. A thread matching the screw rod 7 is provided in the threaded hole. The screw rod 7 is coaxially inserted in the threaded hole. One end of the screw rod 7 is coaxially fixedly connected with the hand wheel 10, and the other end is coaxially fixedly connected with the valve stem 8. The end of the valve stem 8 away from the screw rod 7 is coaxially fixedly connected with the valve disc 9.

[0041] The effect of such a setting is that the screw 7 is rotated by rotating the handwheel 10. Since a threaded hole is provided on the nut seat 6, a threaded hole is provided with a thread matching the screw 7. Through the cooperation between the screw 7 and the nut seat 6, the screw 7 drives the valve stem 8 and the valve disc 9 at the bottom of the valve stem 8 to move up and down in the installation cavity of the valve body 1.

[0042] See also Figure 1 and Figure 5 The valve disc 9 is coaxially arranged with the valve seat 16, and a filtering mechanism is coaxially arranged at the bottom of the valve disc 9, and the filtering mechanism is used to prevent impurities from accumulating on the contact surface between the valve disc 9 and the valve seat 16, and at the same time filter and intercept the impurities in the pipeline;

[0043] The filter mechanism includes a filter cartridge 13, which is coaxially arranged at the bottom of the valve disc 9, the outer wall of the filter cartridge 13 contacts the inner wall of the valve seat 16, and a limit plate 14 is coaxially arranged at the bottom of the filter cartridge 13, and a filter plate is arranged on the limit plate 14;

[0044] The effect of this arrangement is that when the medium enters the installation cavity of the valve body 1, impurities contained in the medium are intercepted at the bottom of the valve seat 16 by the filter cartridge 13 coaxially arranged at the bottom of the valve disc 9, preventing the impurities from passing through the through hole of the valve seat 16 with the medium and remaining at the water outlet 4.

[0045] See also Figure 4 and Figure 5 The valve body 1 has an outlet at the bottom, a sealing gasket 11 is provided on the outer ring of the outlet located outside the valve body 1, a sealing ring 15 is provided at one end of the outlet located in the installation cavity, and a plug 12 is provided inside the outlet;

[0046] The effect of such a configuration is that the plug 12 is threadedly connected to the outlet, a sealing ring 15 is provided at one end of the outlet located in the installation cavity, and a sealing gasket 11 is provided at the outer ring of the outlet located outside the valve body 1. The sealing ring 15 and the sealing gasket 11 are provided to increase the sealing performance between the plug 12 and the outlet, thereby preventing the medium in the circulation pipeline from leaking through the outlet.

[0047] See also Figure 5 , an annular scraper is provided at one end of the valve seat 16 close to the filter cartridge 13;

[0048] The effect of this arrangement is that since the outer wall of the filter cartridge 13 is in contact with the inner wall of the valve seat 16, when the screw 7 drives the valve stem 8 and the valve disc 9 at the bottom of the valve stem 8 to move up and down in the installation cavity of the valve body 1, the annular scraper will drop the impurities adhered to the outer wall of the filter cartridge 13 to the bottom of the valve body 1.

[0049] From the above, we can see that the working principle of this application is as follows:

[0050] By connecting the flange connection plates 2 at both ends of the valve body 1 with the transport pipeline, since the nut seat 6 is fixedly arranged on the valve body 1 through the fixing frame 5, when the hand wheel 10 is turned to rotate the screw 7, the screw 7 drives the valve stem 8 and the valve disc 9 at the bottom of the valve stem 8 to move up and down in the installation cavity of the valve body 1, and the full closing and full opening of the pipeline are realized by the sealing and separation of the valve disc 9 and the valve seat 16. By coaxially arranging a filter cartridge 13 at the bottom of the valve disc 9, the medium enters the installation cavity of the valve body 1, and the impurities contained therein are intercepted by the filter cartridge 13, so that the impurities are prevented from passing through the through hole of the valve seat 16 with the medium to the water outlet 4, and the impurities are prevented from accumulating on the contact surface between the valve disc 9 and the valve seat 16;

[0051] The plug 12 is threadedly connected to the impurity outlet. By providing a screw groove or a lifting ring at one end of the plug 12 away from the valve body 1, it is convenient for the staff to open the plug 12 and discharge the impurities accumulated at the bottom of the valve body 1.

[0052] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A durable stop valve, comprising a valve body (1), a water inlet (3) and a water outlet (4), characterized in that: The valve body (1) is provided with an installation cavity, a valve seat (16) is provided in the installation cavity, a valve flap (9) is provided in the installation cavity, a fixing frame (5) is provided on the valve body (1), a driving mechanism is provided on the fixing frame (5), the driving mechanism comprises a screw (7) for driving the valve flap (9) and the valve seat (16) to close and separate, the valve flap (9) and the valve seat (16) are coaxially arranged, and a filtering mechanism for preventing impurities in the medium from accumulating on the contact surface between the valve flap (9) and the valve seat (16) is coaxially arranged at the bottom of the valve flap (9).

2. A durable stop valve according to claim 1, characterized in that: The driving mechanism further comprises: A nut seat (6) and a hand wheel (10), wherein the nut seat (6) is arranged on a fixing frame (5), a threaded hole is provided on the nut seat (6), a threaded hole is provided with a thread matching the screw rod (7), and the screw rod (7) is coaxially inserted in the threaded hole; A valve stem (8), one end of the screw rod (7) is coaxially fixedly connected to a hand wheel (10), and the other end is coaxially fixedly connected to the valve stem (8), and the end of the valve stem (8) away from the screw rod (7) is coaxially fixedly connected to a valve flap (9).

3. A durable stop valve according to claim 1, characterized in that: Both ends of the valve body (1) are provided with flange connection plates (2).

4. A durable stop valve according to claim 1, characterized in that: The filtering mechanism comprises: A filter cartridge (13), wherein the filter cartridge (13) is coaxially arranged at the bottom of the valve disc (9), and an outer wall of the filter cartridge (13) is in contact with an inner wall of the valve seat (16); A limiting plate (14), wherein the limiting plate (14) is coaxially arranged at the bottom of the filter cartridge (13).

5. A durable stop valve according to claim 4, characterized in that: An annular scraper is provided at one end of the valve seat (16) close to the filter cartridge (13).

6. A durable stop valve according to claim 4, characterized in that: A filter plate is provided on the limiting plate (14).

7. A durable stop valve according to claim 1, characterized in that: The bottom of the valve body (1) is provided with a discharge port, the outer ring of the discharge port located outside the valve body (1) is provided with a sealing gasket (11), one end of the discharge port located in the installation cavity is provided with a sealing ring (15), and a plug (12) is provided inside the discharge port.

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