Low torque stop valve

Abstract

The utility model discloses a low torque stop valve relates to valve technical field. The utility model discloses a valve body is provided with the opening and closing subassembly in its inside, and the opening and closing subassembly includes the bonnet fixedly connected in the top of valve body, and the top fixedly connected with first installation shell of bonnet, and the inside all through the retainer movable joint with a plurality of globes of first installation shell periphery, and the top fixedly connected with second installation shell of first installation shell, and the top rear end rotationally connected with the sleeve pipe of second installation shell. The utility model through globes reduces the friction force that valve rod motion produced, and through the pinion on the sleeve pipe with the pinion on the drive rod to reduce the torque size of input, thereby realized reducing the overall torque size of valve, solved the single problem of the current torque reduction mode, and through first threaded rod and sliding block drive locating plate to lift, and through locating plate to limit the maximum opening of valve, solved the inconvenient control valve opening problem of current.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and in particular relates to a low torque shut-off valve. Background Technology

[0002] Gate valves are a common type of valve, mainly used to cut off or regulate the flow of fluid in pipelines. They are mainly composed of valve body, valve seat, valve cover, valve disc, valve stem and handwheel. The handwheel and valve stem drive the valve disc to move up and down, forming a sealing or opening channel with the valve seat. They are widely used in pipeline systems for water, steam, oil, gas and other products.

[0003] A low-torque shut-off valve is disclosed in the existing patent announcement document CN221443318U. The valve includes a shut-off valve, an inlet pipe that communicates with the interior is fixed to the outer wall of one side of the lower part of the shut-off valve, an outlet pipe is fixedly connected to the middle of the other side of the outer wall of the shut-off valve and penetrates into the inner wall of the shut-off valve, a pressure reducing component for adjusting the pressure at the valve plate is provided on the inner wall of the shut-off valve, and a flow limiting component for closing the valve is provided at the top of the inner wall of the shut-off valve. The pressure reducing component includes a valve seat.

[0004] However, it still has the following drawbacks in practical use:

[0005] 1. The shut-off valve mentioned above reduces the pressure at the valve plate through a pressure-reducing component, thereby reducing torque. However, during use, part of the torque of the shut-off valve comes from the threaded rod. The friction between the threaded rod and the cover plate, as well as the external force of rotating the threaded rod itself, will cause the torque of the shut-off valve to increase. The shut-off valve mentioned above reduces torque in a single way, and the degree of torque reduction is also low.

[0006] 2. The shut-off valve mentioned above achieves shut-off or opening through the cooperation between the valve seat and the valve plate. However, during use, it is not convenient to control the opening degree of the valve plate. If the valve plate is opened too much, it will not only cause downstream equipment overload and system pressure drop, but also reduce the adjustment sensitivity and emergency shut-off capacity. Furthermore, if the fluid velocity is too high when fully open, the valve plate may generate high-frequency vibration due to incomplete fixation, resulting in mechanical wear.

[0007] To address these issues, we provide a low-torque shut-off valve. Utility Model Content

[0008] The purpose of this utility model is to provide a low-torque shut-off valve. By reducing the frictional force generated by the movement of the valve stem through the ball, and by reducing the input torque through the large gear on the sleeve and the small gear on the drive rod, the overall torque of the valve is reduced, thus solving the problem of the single torque reduction method in the existing system. At the same time, the positioning plate is raised and lowered by the first threaded rod and the slider, and the maximum opening of the valve is limited by the positioning plate, thus solving the problem of the inconvenience of controlling the valve opening in the existing system.

[0009] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0010] This utility model relates to a low-torque shut-off valve, comprising a valve body, an opening and closing assembly inside the valve body, the opening and closing assembly including a valve cover fixedly connected to the top of the valve body, a first mounting shell fixedly connected to the top of the valve cover, multiple balls movably connected to the inner perimeter of the first mounting shell via retainers, a second mounting shell fixedly connected to the top of the first mounting shell, a sleeve rotatably connected to the rear end of the top of the second mounting shell, the top end of the sleeve extending to the upper outer side of the second mounting shell, the bottom end of the sleeve extending into the interior of the first mounting shell, a large gear fixedly connected to the outer wall of the inner side of the sleeve, a drive rod rotatably connected to the front end of the interior of the second mounting shell, a small gear fixedly connected to the drive rod on the outer wall of the interior of the second mounting shell, the small gear meshing in front of the large gear, a limit assembly also provided on one side of the valve body, the limit assembly including a third mounting shell fixedly connected to the outer wall of one side of the valve body and a positioning plate movably connected to the inner side of the valve body, a first threaded rod rotatably connected to the interior of the third mounting shell, a slider threadedly connected to the outer wall of the first threaded rod, and one outer wall of the positioning plate extending into the interior of the third mounting shell and fixedly connected to one outer wall of the slider.

[0011] A further feature of this invention is that: a valve stem is connected to the internal thread of the sleeve, the bottom end of the valve stem extends to the inner side of the valve body and is fixedly connected to a valve disc, a valve seat is fixedly connected to the lower inner side of the valve body, and the valve disc is fitted with the valve seat with a clearance.

[0012] A further feature of this invention is that the top of the valve seat is fixedly connected with multiple limiting rods in a circular array at equal intervals, and the top of the limiting rods penetrates the valve disc and is fixedly connected to the top of the inner side of the valve body.

[0013] A further feature of this invention is that the bottom end of the drive rod is rotatably connected to the bottom of the inner front end of the second mounting housing, and the top end of the drive rod extends to the upper outer side of the second mounting housing and is fixedly connected to a handle.

[0014] A further feature of this invention is that the top end of the first threaded rod extends to the upper outer side of the third mounting housing and is fixedly connected to a first knob, and the bottom end of the first threaded rod extends to the lower outer side of the third mounting housing and is fixedly connected to a rotating disk, with multiple limiting holes arranged in a circular array at the bottom of the rotating disk.

[0015] A further feature of this invention is that multiple scale lines indicating the valve opening degree are equally spaced on one side of the outer wall of the third mounting housing.

[0016] A further feature of this invention is that: a U-shaped frame is fixedly connected to the bottom of the third mounting shell; a second threaded rod is threadedly connected to the longitudinal support arm of the U-shaped frame; a second knob is fixedly connected to the bottom end of the second threaded rod; the top end of the second threaded rod extends to the inner side of the U-shaped frame and is fixedly connected to a limiting plate; multiple protrusions are welded at equal intervals in a circular array around the top of the limiting plate; and the top ends of the protrusions are fitted into the inside of the limiting hole with a gap.

[0017] A further feature of this invention is that: a sleeve is fixedly connected to the top inner side of the valve body, a movable rod passes through the bottom end of the sleeve, the bottom ends of the movable rod are fixedly connected to both sides of the upper surface of the positioning plate, the top end of the movable rod extends to the inner side of the sleeve and is fixedly connected to a baffle, a return spring is fixedly connected to the upper surface of the baffle, and the end of the return spring away from the baffle is fixedly connected to the top inner side of the sleeve.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model, by setting up an on / off component, reduces the frictional force generated by the valve stem movement during the movement of the valve stem through the relative rolling between the ball and the valve stem, thereby reducing a portion of the torque generated by the valve stem movement. At the same time, the input torque of the drive rod is reduced by the diameter ratio between the large gear and the small gear. By reducing the torque of the valve in multiple ways, the torque of the valve is reduced, thus facilitating the opening and closing of the valve.

[0020] 2. This utility model, by setting a limiting component, allows the second threaded rod to be rotated by a second knob. The second threaded rod drives the limiting plate to move, causing the protrusion on the limiting plate to move out of the limiting hole. Then, rotating the first knob drives the first threaded rod to rotate. The first threaded rod drives the positioning plate to move inside the valve body through a slider. When the positioning plate moves to a specified height, rotating the first knob stops, so that the positioning plate stops at the specified height inside the valve body. This facilitates the adjustment of the positioning plate height, facilitates the limitation of the maximum valve opening, avoids problems such as downstream equipment overload caused by excessive valve opening, enhances its functionality, and improves its practicality. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the structure of the interruption component of this utility model.

[0024] Figure 3 This is a structural disassembly diagram of the valve cover, the first mounting shell, and the second mounting shell of this utility model.

[0025] Figure 4 This is a side sectional view of the first mounting shell of this utility model.

[0026] Figure 5 This is a side sectional view of the second mounting shell of this utility model.

[0027] Figure 6 This is a schematic diagram of the limiting component of this utility model.

[0028] Figure 7 This is a structural disassembly diagram of the third mounting shell of this utility model.

[0029] Figure 8 This is a schematic diagram of the structure of the first threaded rod of this utility model.

[0030] Figure 9 This is a structural disassembly diagram of the positioning plate of this utility model.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1-Valve body, 2-Switch assembly, 201-Valve cover, 202-First mounting housing, 203-Ball, 203a-Retainer, 204-Second mounting housing, 205-Sleeve, 205a-Large gear, 206-Drive rod, 206a-Pin gear, 206b-Handle, 207-Valve stem, 208-Valve disc, 209-Valve seat, 209a-Limit rod, 3-Limit assembly, 301-Third mounting housing 301a - Scale line, 302 - First threaded rod, 302a - First knob, 302b - Rotary disk, 302c - Limiting hole, 303 - Slider, 304 - Positioning plate, 304a - Sleeve, 304b - Movable rod, 304c - Baffle, 304d - Return spring, 305 - Limiting disk, 305a - U-shaped frame, 305b - Second threaded rod, 305c - Second knob, 305d - Protrusion. Detailed Implementation

[0033] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0034] Example 1, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this is the first embodiment of the present invention. This embodiment provides a low-torque shut-off valve, including a valve body 1. The valve body 1 has an opening and closing assembly 2 inside. The opening and closing assembly 2 includes a valve cover 201, a first mounting shell 202, a ball 203, a second mounting shell 204, a sleeve 205, and a drive rod 206. The ball 203 reduces the frictional force generated by the movement of the valve rod 207, and the large gear 205a on the sleeve 205 and the small gear 206a on the drive rod 206 reduce the input torque, thereby reducing the overall torque of the valve and solving the problem of the single torque reduction method in the existing methods.

[0035] Specifically, the valve cover 201 is fixedly connected to the top of the valve body 1. A first mounting shell 202 is fixedly connected to the top of the valve cover 201. Multiple balls 203 are movably connected to the inside of the first mounting shell 202 around its perimeter via retainers 203a. A second mounting shell 204 is fixedly connected to the top of the first mounting shell 202. A sleeve 205 is rotatably connected to the rear end of the top of the second mounting shell 204. The top end of the sleeve 205 extends to the upper outer side of the second mounting shell 204, and the bottom end of the sleeve 205 extends into the inside of the first mounting shell 202. A large gear 205a is fixedly connected to the outer wall of the sleeve 205 located inside the second mounting shell 204. A drive rod 206 is rotatably connected to the front end of the inside of the second mounting shell 204. A small gear 206a is fixedly connected to the outer wall of the drive rod 206 located inside the second mounting shell 204. 206a meshes in front of the large gear 205a. The valve cover 201 is set to install the first mounting shell 202 and other structures on the valve body 1. The first mounting shell 202 is set to install the ball 203, the second mounting shell 204 and other structures. The ball 203 is set to reduce the friction of the valve stem 207 movement, thereby reducing some of the torque generated by friction. The retainer 203a is set to install the ball 203 inside the first mounting shell 202. The second mounting shell 204 is set to install the sleeve 205 and other structures. The sleeve 205 is set to install the valve stem 207 and drive the valve stem 207 to move. The large gear 205a is set to drive the sleeve 205 to rotate. The drive rod 206 and the small gear 206a are set to drive the large gear 205a to rotate.

[0036] Furthermore, the sleeve 205 is internally threaded with a valve stem 207, the bottom end of the valve stem 207 extends to the inside of the valve body 1 and is fixedly connected with a valve disc 208, and a valve seat 209 is fixedly connected to the lower inside of the valve body 1, with the valve disc 208 clearance-fitted inside the valve seat 209.

[0037] The top of the valve seat 209 is fixedly connected in a circular array with multiple limiting rods 209a at equal intervals. The top of the limiting rods 209a passes through the valve disc 208 and is fixedly connected to the top of the inner side of the valve body 1.

[0038] The bottom end of the drive rod 206 is rotatably connected to the bottom of the inner front end of the second mounting housing 204, and the top end of the drive rod 206 extends to the upper outer side of the second mounting housing 204 and is fixedly connected to a handle 206b.

[0039] The operation process of this embodiment is as follows: by rotating the drive rod 206 through the handle 206b, the drive rod 206 drives the large gear 205a and the sleeve 205 to rotate through the small gear 206a, thereby causing the sleeve 205 to drive the valve stem 207 to move. The valve stem 207 drives the valve disc 208 to move relative to the valve seat 209, thereby realizing the opening and closing of the valve body 1. The ball 203 reduces part of the frictional force generated between the valve stem 207 and the valve cover 201 due to relative movement, thereby reducing part of the torque generated by friction.

[0040] Example 2, please refer to Figure 1 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, this is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but differs from the previous embodiment in that a limiting component 3 is also provided on one side of the valve body 1. The limiting component 3 includes a third mounting shell 301, a first threaded rod 302, a slider 303, and a positioning plate 304. The positioning plate 304 is driven to rise and fall by the first threaded rod 302 and the slider 303, and the maximum opening degree of the valve is limited by the positioning plate 304, which solves the problem of the existing valve opening degree being inconvenient to control.

[0041] Specifically, the third mounting housing 301 is fixedly connected to one side of the outer wall of the valve body 1. The first threaded rod 302 is rotatably connected inside the third mounting housing 301. The slider 303 is threadedly connected to the outer wall of the first threaded rod 302. The positioning plate 304 is movably connected to the inner side of the valve body 1. One side of the outer wall of the positioning plate 304 extends into the interior of the third mounting housing 301 and is fixedly connected to one side of the outer wall of the slider 303. The third mounting housing 301 is used to install the first threaded rod 302. The first threaded rod 302 and the slider 303 are used to drive the positioning plate 304 to rise and fall. The positioning plate 304 is used to limit the maximum opening of the valve.

[0042] Furthermore, the top end of the first threaded rod 302 extends to the upper outer side of the third mounting shell 301 and is fixedly connected to the first knob 302a, and the bottom end of the first threaded rod 302 extends to the lower outer side of the third mounting shell 301 and is fixedly connected to the rotating disk 302b. The bottom of the rotating disk 302b is provided with multiple limiting holes 302c in a circular array.

[0043] The outer wall of one side of the third mounting housing 301 has multiple scale lines 301a at equal intervals to indicate the valve opening degree.

[0044] The bottom of the third mounting shell 301 is fixedly connected to a U-shaped frame 305a. A second threaded rod 305b is threadedly connected to the longitudinal support arm of the U-shaped frame 305a. The thread engagement direction of the second threaded rod 305b is opposite to that of the first threaded rod 302. A second knob 305c is fixedly connected to the bottom end of the second threaded rod 305b. The top end of the second threaded rod 305b extends to the inside of the U-shaped frame 305a and is fixedly connected to a limiting plate 305. Multiple protrusions 305d are welded in a circular array at equal intervals around the top of the limiting plate 305. The top end of the protrusions 305d is fitted into the inside of the limiting hole 302c with a clearance.

[0045] A sleeve 304a is fixedly connected to the top inner side of the valve body 1. A movable rod 304b passes through the bottom end of the sleeve 304a. The bottom ends of the movable rod 304b are fixedly connected to both sides of the upper surface of the positioning plate 304. The top end of the movable rod 304b extends to the inner side of the sleeve 304a and is fixedly connected to a baffle 304c. A return spring 304d is fixedly connected to the upper surface of the baffle 304c. The end of the return spring 304d away from the baffle 304c is fixedly connected to the top inner side of the sleeve 304a.

[0046] The rest of the structure is the same as in Example 1.

[0047] The operation process of this embodiment is as follows: the second threaded rod 305b is rotated by the second knob 305c, and the second threaded rod 305b drives the limiting plate 305 to move, so that the protrusion 305d on the limiting plate 305 moves out of the limiting hole 302c. Then, the first knob 302a is rotated, and the first knob 302a drives the first threaded rod 302 to rotate. The first threaded rod 302 drives the positioning plate 304 to move inside the valve body 1 through the slider 303. When the positioning plate 304 moves to the specified height, the first knob 302a is stopped, so that the positioning plate 304 stays at the specified height inside the valve body 1.

[0048] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it.

Claims

1. A low-torque shut-off valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with an opening and closing assembly (2), and the opening and closing assembly (2) includes a valve cover (201) fixedly connected to the top of the valve body (1). A first mounting shell (202) is fixedly connected to the top of the valve cover (201), and multiple balls (203) are movably connected to the inner periphery of the first mounting shell (202) through a retainer (203a). A second mounting shell (204) is fixedly connected to the top of the first mounting shell (202), and a sleeve (205) is rotatably connected to the rear end of the top of the second mounting shell (204). The top end of the sleeve (205) extends to the upper outer side of the second mounting shell (204), and the bottom end of the sleeve (205) extends to the interior of the first mounting shell (202). A large gear (205a) is fixedly connected to the outer wall of the sleeve (205) located inside the second mounting shell (204), and the first... A drive rod (206) is rotatably connected to the front end of the second mounting shell (204). The drive rod (206) is fixedly connected to a small gear (206a) on the outer wall inside the second mounting shell (204). The small gear (206a) meshes with the front of the large gear (205a). A limit assembly (3) is also provided on one side of the valve body (1). The limit assembly (3) includes a third mounting shell (301) fixedly connected to the outer wall of one side of the valve body (1) and a positioning plate (304) movably connected to the inner side of the valve body (1). A first threaded rod (302) is rotatably connected inside the third mounting shell (301). A slider (303) is threadedly connected to the outer wall of the first threaded rod (302). One side of the outer wall of the positioning plate (304) extends into the interior of the third mounting shell (301) and is fixedly connected to one side of the outer wall of the slider (303).

2. The low-torque shut-off valve according to claim 1, characterized in that, The sleeve (205) is internally threaded with a valve stem (207), and the bottom end of the valve stem (207) extends to the inside of the valve body (1) and is fixedly connected with a valve disc (208). A valve seat (209) is fixedly connected to the lower inside of the valve body (1), and the valve disc (208) is clearance-fitted inside the valve seat (209).

3. A low-torque shut-off valve according to claim 2, characterized in that, The top of the valve seat (209) is fixedly connected with multiple limiting rods (209a) in a circular array at equal intervals, and the top of the limiting rods (209a) passes through the valve disc (208) and is fixedly connected to the top of the inner side of the valve body (1).

4. A low-torque shut-off valve according to claim 1, characterized in that, The bottom end of the drive rod (206) is rotatably connected to the bottom of the inner front end of the second mounting housing (204), and the top end of the drive rod (206) extends to the upper outer side of the second mounting housing (204) and is fixedly connected to a handle (206b).

5. A low-torque shut-off valve according to claim 1, characterized in that, The top end of the first threaded rod (302) extends to the upper outer side of the third mounting shell (301) and is fixedly connected to the first knob (302a), and the bottom end of the first threaded rod (302) extends to the lower outer side of the third mounting shell (301) and is fixedly connected to the rotating disk (302b). The bottom of the rotating disk (302b) is provided with a plurality of limiting holes (302c) in a circular array.

6. A low-torque shut-off valve according to claim 5, characterized in that, The outer wall of one side of the third mounting housing (301) is provided with multiple scale lines (301a) at equal intervals to indicate the valve opening degree.

7. A low-torque shut-off valve according to claim 5, characterized in that, The bottom of the third mounting shell (301) is fixedly connected to a U-shaped frame (305a), and a second threaded rod (305b) is threadedly connected to the longitudinal support arm of the U-shaped frame (305a). The bottom end of the second threaded rod (305b) is fixedly connected to a second knob (305c), and the top end of the second threaded rod (305b) extends to the inner side of the U-shaped frame (305a) and is fixedly connected to a limiting plate (305). The top of the limiting plate (305) is surrounded by a circular array of multiple protrusions (305d) welded at equal intervals, and the top end of the protrusions (305d) is fitted with a gap inside the limiting hole (302c).

8. A low-torque shut-off valve according to claim 1, characterized in that, A sleeve (304a) is fixedly connected to the top inner side of the valve body (1), and a movable rod (304b) passes through the bottom end of the sleeve (304a). The bottom ends of the movable rod (304b) are fixedly connected to both sides of the upper surface of the positioning plate (304), and the top end of the movable rod (304b) extends to the inner side of the sleeve (304a) and is fixedly connected to a baffle (304c). A return spring (304d) is fixedly connected to the upper surface of the baffle (304c), and the end of the return spring (304d) away from the baffle (304c) is fixedly connected to the top inner side of the sleeve (304a).

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