A stop valve

Abstract

The utility model relates to a kind of stop valves, including valve body, hand wheel, and the valve stem that is fixed and rotatably installed in valve body with hand wheel, the valve stem bottom is fixedly installed with valve core, the inflow passage and outflow passage of the valve body are located in the left and right sides of valve core, the valve body includes detachably connected upper mounting seat and lower mounting seat, the valve stem is inserted upper mounting seat and lower mounting seat and valve core is located in lower mounting seat, the lower mounting seat is detachably installed with filter sleeve between inflow passage and outflow passage, the filter sleeve includes fixed section and the matching section below fixed section, the fixed section is made of rubber and radially two sides with lower mounting seat detachably connect, the fixed section inside is provided with filter screen, using above scheme, provide a kind of stop valve, which can be intercepted by filter screen in filter sleeve for fluid entering from inflow passage, so as to shorten the flow path of impurities and delay the generation of lower mounting seat wear.

Description

Technical Field

[0001] This utility model relates to a shut-off valve. Background Technology

[0002] Gate valves, as a commonly used fluid control valve, are widely used in petroleum, chemical, power and water treatment fields. Their core function is to control the flow of media in pipelines by opening and closing the valve disc and valve seat through the valve stem.

[0003] However, during long-term operation, existing gate valves often suffer from particulate impurities (such as welding slag, rust, sand, etc.) carried in the fluid entering the valve seat sealing area, causing scratches, wear, or foreign objects to become embedded in the sealing surface between the valve disc and the valve seat, resulting in poor sealing and affecting the valve's closing performance and service life.

[0004] Therefore, how to reduce the occurrence of particulate impurities scratching the valve seat and affecting the sealing performance has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a shut-off valve in which the fluid entering from the inflow channel can be intercepted by the filter screen inside the filter sleeve, thereby shortening the flow path of impurities and delaying the wear of the lower mounting seat.

[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes a valve body, a handwheel, and a valve stem fixed to the handwheel and rotatably mounted within the valve body. A valve core is fixedly mounted at the bottom of the valve stem. The valve body has inflow and outflow channels located on the left and right sides of the valve core. The valve body includes a detachably connected upper mounting seat and a lower mounting seat. The valve stem is inserted into the upper and lower mounting seats, and the valve core is located within the lower mounting seat. A filter sleeve is detachably mounted on the lower mounting seat between the inflow and outflow channels. The filter sleeve includes a fixed section and a mating section located below the fixed section. The fixed section is made of rubber and is detachably connected to the lower mounting seat on both radial sides. A filter screen is provided inside the fixed section.

[0007] The present invention is further configured such that: positioning blocks are provided on both radially downward protruding sides of the fixed section; the lower mounting base is provided with positioning slots corresponding to each positioning block; each positioning block is provided with an inwardly recessed mating slot; each mating slot is annular; and the lower mounting base is provided with mating blocks located within each positioning slot.

[0008] The present invention is further configured such that: the fixed section is provided with a plurality of insertion holes, and the lower mounting base is provided with screw holes corresponding to each insertion hole.

[0009] The present invention is further configured such that: a through hole is provided through the mating section, and a plurality of flow-disrupting elements are provided circumferentially around the through hole, and one end of each flow-disrupting element is fixedly connected to the inner wall of the mating section.

[0010] The present invention is further configured such that: each of the turbulence components is provided with a number of turbulence strips protruding from it, and each turbulence strip is arranged at intervals along the inner end face of the turbulence component.

[0011] The present invention is further configured to include a number of connecting bolts and the same number of nuts. The lower mounting seat is provided with a mounting cavity for the valve disc to move up and down. The lower mounting seat is located on the upper side of the mounting cavity and is open. Each of the connecting bolts is inserted into the upper mounting seat and the lower mounting seat and is threadedly engaged with the nut at the corresponding position.

[0012] The present invention is further configured such that: the upper mounting base is provided with a positioning block protruding downwards, and the lower mounting base is provided with a positioning groove corresponding to the positioning block.

[0013] The present invention is further configured to include a sealing ring located between the positioning block and the lower mounting base.

[0014] By adopting the above technical solution, since the filter sleeve is located between the inflow channel and the outflow channel, the fluid in the inflow channel will pass through the filter sleeve before entering the outflow channel during its flow to the outflow channel. Therefore, impurities contained in the fluid in the inflow channel can be intercepted after entering the filter screen of the fixed section of the filter sleeve and thus cannot flow to the outflow channel, thereby shortening the movement path of impurities contained in the fluid. Specifically, they cannot enter the outflow channel. 2. Since the upper mounting base and the lower mounting base are detachably connected, and the fixed section is detachably connected to the lower mounting base, it is convenient to install the filter sleeve into the lower mounting base after separating the upper mounting base and the lower mounting base. At the same time, it is convenient to remove the filter sleeve installed in the lower mounting base after separating the upper mounting base and the lower mounting base. 2. Since the fixed section at the top of the filter sleeve is made of rubber, it can reduce the situation where the valve core, which moves up and down synchronously with the valve stem, contacts the fixed section and causes collision and wear on the fixed section during the process of rotating the handwheel to drive the valve stem to move up and down. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1This is a cross-sectional view of a specific embodiment of the present utility model;

[0017] Figure 2 This is a cross-sectional view of the filter sleeve;

[0018] Figure 3 for Figure 1 Enlarged view of A in the middle;

[0019] Figure 4 for Figure 1 A magnified view of B in the middle.

[0020] In the diagram: 1-valve body, 11-inflow channel, 12-outflow channel, 13-upper mounting base, 131-positioning block, 14-lower mounting base, 141-positioning slot, 142-mating insert, 143-screw hole, 144-mounting cavity, 145-positioning groove;

[0021] 2-Handwheel;

[0022] 3-Valve stem, 31-Valve core;

[0023] 4-Filter sleeve, 41-Fixed section, 411-Filter screen, 412-Positioning block, 4121-Matching slot, 413-Insertion hole, 42-Matching section, 421-Through hole, 422-Breakout component, 4221-Breakout strip;

[0024] 5-Connecting bolts;

[0025] 6-nut;

[0026] 7-Sealing ring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1-4As shown, this utility model discloses a shut-off valve, including a valve body 1, a handwheel 2, and a valve stem 3 fixed to the handwheel 2 and rotatably installed inside the valve body 1. A valve core 31 is fixedly installed at the bottom of the valve stem 3 by welding or other means. The valve body 1 has an inflow channel 11 and an outflow channel 12 located on the left and right sides of the valve core 31. The valve stem 3 is threadedly connected to the valve body 1. By applying torque to the handwheel 2, the valve stem 3 is driven to rotate. As the valve stem 3 rotates, it rises and falls, thereby causing the valve core 31, which is fixed to the valve stem 3, to move upward and away from the inflow channel 11 and the outflow channel 12, so that the two are connected, or to move downward and be located in the inflow channel 11 and the outflow channel 12. This allows for the interception of liquid flow, thus achieving either flow interruption or shut-off (this is existing technology and will not be described in detail here). The valve body 1 includes a detachably connected upper mounting seat 13 and a lower mounting seat 14. The valve stem 3 is inserted into the upper mounting seat 13 and the lower mounting seat 14, while the valve core 31 is located within the lower mounting seat 14. The lower mounting seat 14 is located between the inflow channel 11 and the outflow channel 12 and is detachably fitted with a filter sleeve 4, the upper end of which abuts against the valve core 31. The filter sleeve 4 includes a fixed section 41 and a mating section 42 located below the fixed section 41. The fixed section 41 is made of rubber and is detachably connected to the lower mounting seat 14 on both radial sides. A filter screen 411 is provided inside the fixed section 41. Since the filter sleeve 4 is located between the inflow channel 11 and the outflow channel 12, the fluid in the inflow channel 11 will pass through the filter sleeve 4 before entering the outflow channel 12 during its flow to the outflow channel 12. Therefore, impurities contained in the fluid in the inflow channel 11 can be intercepted after entering the filter screen 411 of the fixed section 41 of the filter sleeve 4 and thus cannot flow to the outflow channel 12, thereby shortening the movement path of impurities contained in the fluid. Specifically, it prevents them from entering the outflow channel 12; 2. Since the upper mounting base 13 and the lower mounting base 14 are detachably connected and fixed The fixed section 41 is detachably connected to the lower mounting base 14. Therefore, after separating the upper mounting base 13 and the lower mounting base 14, it is convenient to insert the filter sleeve 4 into the lower mounting base 14. At the same time, after separating the upper mounting base 13 and the lower mounting base 14, it is convenient to remove the filter sleeve 4 installed in the lower mounting base 14. 2. Since the fixed section 41 located at the top of the filter sleeve 4 is made of rubber, when the handwheel 2 is turned to drive the valve stem 3 to move up and down, the situation of the valve core 31 moving up and down synchronously with the valve stem 3 contacting the fixed section 41 and causing collision and wear on the fixed section 41 can be reduced.

[0029] The fixed section 41 has downwardly protruding positioning blocks 412 on both radially sides. The lower mounting base 14 has positioning slots 141 corresponding to each positioning block 412. Each positioning block 412 has an inwardly recessed mating slot 4121, and each mating slot 4121 is annular. The lower mounting base 14 has mating blocks 142 located within each positioning slot 141. After the fixed section 41 of the filter sleeve 4 is installed into the lower mounting base 14, each positioning block 412 of the fixed section 41 enters its corresponding positioning slot 141, thus determining the relative position of the filter sleeve 4 and the lower mounting base 14, facilitating the fixing of the filter sleeve 4 and the lower mounting base 14. When each positioning block 412... When the positioning insert 412 moves downward into the corresponding positioning slot 141, the part below the positioning insert 412 and the corresponding positioning slot 4121 will first contact the corresponding positioning insert 142 and force it downward over the positioning insert 142 to achieve the engagement of the positioning insert 412 and the positioning slot 141. When the filter sleeve 4 needs to be removed for cleaning, the upper mounting base 13 and the lower mounting base 14 are separated to contact the fixing section 41. After the fixing section 41 and the lower mounting base 14 are released, an upward force is applied to the fixing section 41, which causes the part of the positioning insert 412 below the positioning insert 142 to move upward over the corresponding positioning insert 142, thereby separating the positioning insert 412 from the positioning slot 141.

[0030] In addition, after the connection and fixation between the fixed section 41 and the lower mounting base 14 are completed, the fluid flowing from the inflow channel 11 to the outflow channel 12 needs to pass over each positioning block 412 before it can flow into the space between the lower mounting base 14 and the fixed section 41. Therefore, each positioning block 412 can play an indirect sealing role.

[0031] The fixed section 41 is provided with a number of insertion holes 413. The lower mounting base 14 is provided with screw holes 143 corresponding to each insertion hole 413. The bolts that are compatible with the screw holes 143 are inserted into the corresponding insertion holes 413 to complete the cooperation with the screw holes 143 on the lower mounting base 14, thereby realizing the connection between the fixed section 41 and the lower mounting base 14, so that the filter sleeve 4 can be stably located in the lower mounting base 14.

[0032] Preferably, a through hole 421 is provided through the mating section 42, and a plurality of flow-disrupting elements 422 are arranged circumferentially around the through hole 421. One end of each flow-disrupting element 422 is fixedly connected to the inner wall of the mating section 42. Each flow-disrupting element 422 can structurally support the mating section 42 and enhance the strength of the inner wall of the mating section 42. In addition, the presence of the flow-disrupting elements 422 can disrupt the flowing fluid (i.e., turbulence), so that the fluid is more evenly distributed before entering the filter screen 411 and improves the overall filtration efficiency. Furthermore, each flow-disrupting element 422 can act as a resistance element, which can consume some kinetic energy and reduce the speed at which the liquid impacts the filter screen 411.

[0033] Each of the flow-deflecting components 422 is provided with several flow-deflecting strips 4221. Each flow-deflecting strip is arranged at intervals along the inner end face of the flow-deflecting component 422. The flow-deflecting strips 4221 should be made of wear-resistant and corrosion-resistant materials (such as stainless steel and engineering plastics) to prevent long-term erosion damage. The arrangement of each flow-deflecting strip 4221 increases the inner end face area of ​​each flow-deflecting component 422, and further promotes the uniform flow of liquid while each flow-deflecting component 422 achieves flow deflection.

[0034] In addition, it includes several connecting bolts 5 and the same number of nuts 6. The handwheel 2 is located above the upper mounting seat 13 and the valve stem 3 is inserted into the upper mounting seat 13. The end of the valve stem 3 is located in the lower mounting seat 14. The lower mounting seat 14 is provided with a mounting cavity 144 for the valve disc to move up and down. The lower mounting seat 14 is located on the upper side of the mounting cavity 144 and is open. Each of the connecting bolts 5 is inserted into the upper mounting seat 13 and the lower mounting seat 14 and is threadedly engaged with the corresponding nut 6. Therefore, after the filter sleeve 4 is installed into the mounting cavity 144 to fix it to the lower mounting seat 14, the upper mounting seat 13 is then installed into the lower mounting seat 14. At this time, when the bottom of the valve disc abuts against the fixed section 41 of the filter sleeve 4, the relative position of the upper mounting seat 13 and the lower mounting seat 14 is determined, thus facilitating the fixing of the two.

[0035] The upper mounting base 13 is provided with a positioning block 131 protruding downwards, and the lower mounting base 14 is provided with a positioning groove 145 corresponding to the positioning block 131. During the process of installing the upper mounting base 13 into the lower mounting base 14, the positioning block 131 on the upper mounting base 13 enters into the positioning groove 145 and its bottom abuts against the lower mounting base 14. At this time, the positions of the upper mounting base 13 and the lower mounting base 14 in the radial direction can be determined. After the connecting bolt 5 and nut 6 are installed, the upper mounting base 13 and the lower mounting base 14 are fixed.

[0036] Preferably, it also includes a sealing ring 7 located between the positioning block 131 and the lower mounting base 14. The sealing ring 7 can further reduce the upward flow of fluid in the lower mounting base 14 out of the upper mounting base 13.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A shut-off valve, comprising a valve body, a handwheel, and a valve stem fixed to the handwheel and rotatably mounted within the valve body, wherein a valve core is fixedly mounted at the bottom of the valve stem, and the valve body comprises an inflow channel and an outflow channel located on the left and right sides of the valve core, characterized in that: The valve body includes a detachably connected upper mounting seat and a lower mounting seat. The valve stem is inserted into the upper mounting seat and the lower mounting seat, while the valve core is located in the lower mounting seat. The lower mounting seat is located between the inflow channel and the outflow channel and is detachably fitted with a filter sleeve. The filter sleeve includes a fixed section and a mating section located below the fixed section. The fixed section is made of rubber and is detachably connected to the lower mounting seat on both radial sides. A filter screen is provided inside the fixed section.

2. A shut-off valve according to claim 1, characterized in that: The fixed section has positioning blocks protruding downwards on both radial sides. The lower mounting base has positioning slots corresponding to each positioning block. Each positioning block has an inwardly recessed mating slot. Each mating slot is annular. The lower mounting base has mating blocks located within each positioning slot.

3. A shut-off valve according to claim 2, characterized in that: The fixed section is also provided with a number of insertion holes, and the lower mounting base is provided with screw holes corresponding to each insertion hole.

4. A shut-off valve according to claim 1 or 3, characterized in that: The mating section has a through hole, and several flow-disrupting elements are arranged circumferentially around the through hole. One end of each flow-disrupting element is fixedly connected to the inner wall of the mating section.

5. A shut-off valve according to claim 4, characterized in that: Each spoiler is provided with several spoiler strips, and each spoiler strip is arranged at intervals along the inner end face of the spoiler.

6. A shut-off valve according to claim 1, characterized in that: It also includes a number of connecting bolts and the same number of nuts. The lower mounting seat is provided with a mounting cavity for the valve disc to move up and down. The lower mounting seat is located on the upper side of the mounting cavity and is open. Each of the connecting bolts is inserted into the upper mounting seat and the lower mounting seat and is threadedly engaged with the nut at the corresponding position.

7. A shut-off valve according to claim 6, characterized in that: The upper mounting base has a positioning block protruding downwards, and the lower mounting base has a positioning groove corresponding to the positioning block.

8. A shut-off valve according to claim 7, characterized in that: It also includes a sealing ring located between the positioning block and the lower mounting base.

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