Valve capable of conveniently adjusting flow

Abstract

The invention relates to the technical field of valves, and discloses a valve convenient to adjust flow, which comprises a valve mechanism, the valve mechanism comprises a valve body, a valve rod is arranged at the top of the valve body in a penetrating manner, a limiting mechanism is mounted on the surfaces of the valve body and the valve rod, a valve handle is fixedly connected to the upper end of the limiting mechanism, and connecting pipes are communicated to two sides of the valve body. A flange fixedly sleeves one end of the connecting pipe, a valve element is fixedly connected to the end, located in the valve body, of the valve rod, a sealing sleeve fixedly sleeves the surface of the valve element, a sealing mechanism is installed on the surfaces of the flange and the connecting pipe, and the limiting mechanism comprises a vertical rod slidably connected to the valve rod. The lower end of the vertical rod penetrates into the valve rod and is fixedly connected with a round block. Accurate positioning of the valve rod and discrete locking of the opening degree of the valve can be achieved, online pressure compensation of the sealing gasket can be achieved, and the dual functions of adjusting and locking can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to a valve convenient for adjusting the flow rate. Background Art

[0002] A ball valve refers to a valve in which the ball is driven by a valve stem and rotates around the axis of the ball valve. The ball valve is mainly used in pipelines to cut off, distribute, and change the flow direction of the medium. It only needs a 90-degree rotation operation and a very small rotational torque to close tightly.

[0003] After retrieval, a Chinese patent with the publication number CN214146675U discloses a valve convenient for adjusting the flow rate, which relates to the field of valve control and includes a first valve body. Although it has the advantage of facilitating the control of the fluid flow rate by the valve, there are still the following problems: 1. After the adjustment is completed, the handle is not limited. When the valve ball inside the valve is impacted by the fluid, the valve core is prone to rotate, thereby changing the flow rate of the valve and affecting the use. 2. When connecting the valve to the pipeline, a gasket is used for sealing. However, the sealing effect of the gasket will gradually deteriorate after long-term use, and it needs to be disassembled and replaced. It is impossible to improve the sealing effect of the gasket without disassembly. Summary of the Invention

[0004] Technical Problems to be Solved Aiming at the deficiencies of the prior art, the present invention provides a valve convenient for adjusting the flow rate, mainly to solve the problems that when the valve ball inside is impacted by a large amount of fluid, it is prone to rotate for a long time, thereby changing the flow rate, and when connecting the valve to the pipeline, a gasket is used for sealing, but the sealing effect of the gasket will gradually deteriorate after long-term use, and it needs to be disassembled and replaced. It is impossible to improve the sealing effect of the gasket without disassembly.

[0005] Technical Solutions To achieve the above object, the present invention provides the following technical solutions: A valve convenient for adjusting the flow rate includes a valve mechanism. The valve mechanism includes a valve body. A valve stem penetrates through the top of the valve body. One end of the valve stem inside the valve body is fixedly connected to a valve core. A sealing sleeve is fixedly sleeved on the surface of the valve core. A limiting mechanism for restricting the position of the valve stem is installed on the surfaces of the valve body and the valve stem. Connecting pipes communicate with both sides of the valve body. Flanges are fixedly sleeved at the ends of the connecting pipes. A sealing mechanism cooperating with the pipeline is installed on the flanges and the connecting pipes.

[0006] As a further solution of the present invention, the limiting mechanism includes a vertical rod slidably connected to the valve stem. The upper end of the vertical rod is fixedly connected with a valve handle. The lower end of the vertical rod penetrates into the valve stem and is fixedly connected with a round block. The surface of the round block is fixedly connected with a guide block. A guide groove matching with the guide block is opened in the valve stem, and the guide block is slidably connected in the guide groove.

[0007] As a further solution of the present invention, a first spring is sleeved on the surface of the vertical rod, and two ends of the first spring are respectively connected with the surface of the round block and the inner wall of the valve stem.

[0008] As a further solution of the present invention, a limiting member is fixedly connected to the surface of the vertical rod. A sleeve is fixedly connected to the top of the valve body and sleeved on the surface of the valve stem. A plurality of limiting holes matching with the limiting member are opened at the top of the sleeve, and the limiting member is inserted into the limiting holes.

[0009] As a further solution of the present invention, the sealing mechanism includes an annular plate movably connected in the flange. A sealing gasket is fixedly connected to one side of the annular plate. A round rod is slidably connected to the flange and fixedly connected to the other side of the annular plate.

[0010] As a further solution of the present invention, screw teeth are fixedly connected to the surface of the connecting pipe. A threaded ring is threadedly sleeved on the surface of the screw teeth. A first sleeve ring is fixedly sleeved on the surface of the round rod. A second sleeve ring is slidably sleeved on the surface of the round rod. A second spring is movably sleeved on the surface of the round rod, and two ends of the second spring are respectively in contact with the surfaces of the first sleeve ring and the second sleeve ring.

[0011] As a further solution of the present invention, a short rod is fixedly connected to one side of the second sleeve ring. A ball is embedded at one end of the short rod away from the second sleeve ring, and the ball is in contact with the surface of the threaded ring.

[0012] As a further solution of the present invention, the valve mechanism further includes a movable block arranged on the side wall of the valve stem. Two limiting blocks for limiting the moving range of the movable block are arranged at the upper end of the sleeve.

[0013] Beneficial effects Compared with the prior art, the present invention provides a valve convenient for adjusting the flow rate, and has the following beneficial effects: 1. Through the linkage limiting structure of the guide block and guide groove and the first spring, the present invention realizes the precise positioning of the valve stem. When the valve handle is pressed down, the first spring pushes the limiting member to insert into the limiting hole of the sleeve, and the guide block slides along the guide groove to eliminate the radial clearance, solving the problem that the valve core of the traditional valve is offset due to the fluid impact, improving the flow rate adjustment accuracy and enhancing the impact resistance.

[0014] 2. The present invention realizes the discrete locking of the valve opening through the coordinated design of multi-stage limit holes and limit parts. The multiple limit holes in the annular array on the top of the casing correspond to the graduated adjustment of the valve core from fully closed to fully open, which solves the defect of micro-displacement easily generated by continuous adjustment and ensures the flow control accuracy.

[0015] 3. The present invention realizes online pressure compensation of the sealing gasket through the elastic compensation structure of the threaded ring and the second spring. The threaded ring is rotated to push the second ring to compress the second spring, and the axial pressure is converted into a radial expansion force of the ring plate on the sealing gasket through the round rod, which solves the problem that the traditional flange seal needs to be disassembled and replaced, and prolongs the service life of the seal.

[0016] 4. The present invention realizes the dual functions of adjustment and locking through the separate driving structure of the vertical rod and the round block. When the valve handle is lifted, the vertical rod drives the limit piece to disengage from the limit hole, and when it is pressed down, the spring automatically resets and locks, which solves the defect of excessive operating force in the traditional integrated valve stem, reduces the single adjustment operating force, and improves the adjustment efficiency.

[0017] 5. The present invention realizes smooth adjustment of the threaded ring through the low-friction transmission design of the ball and the short rod. The ball embedded in the end of the short rod forms rolling contact with the inclined surface of the threaded ring, which reduces the friction coefficient, solves the problem of sealing pressure adjustment jamming, and reduces the torque of one-hand operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a valve for adjusting flow rate proposed by the present invention; Figure 2 A schematic diagram of the cross-sectional plan structure of a valve for adjusting flow rate proposed by the present invention; Figure 3 A valve for adjusting flow rate proposed by the present invention Figure 2 A is an enlarged schematic diagram; Figure 4 A schematic diagram of a partially cutaway three-dimensional structure of a valve stem of a valve for adjusting flow rate proposed by the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of a sealing mechanism of a valve for adjusting flow rate proposed by the present invention.

[0019] In the figure: 100, valve mechanism; 101, valve body; 102, valve stem; 103, valve handle; 104, connecting pipe; 105, flange; 106, valve core; 107, sealing sleeve; 108, limit block; 109, movable block; 200, limiting mechanism; 201, vertical rod; 202, round block; 203, guide block; 204, guide groove; 205, first spring; 206, limiting piece; 207, housing; 208, limiting hole; 300, sealing mechanism; 301, ring plate; 302, gasket; 303, round rod; 304, thread; 305, threaded ring; 306, first collar; 307, second collar; 308, second spring; 309, short rod; 310, ball. Detailed implementation manners

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in the present invention, unless otherwise clearly defined and limited, both include direct and indirect connection (coupling). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0022] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0023] Refer to Figures 1 - 5A valve for adjusting flow rate comprises a valve mechanism 100, wherein the valve mechanism 100 comprises a valve body 101, a valve stem 102 is provided through the top of the valve body 101, a valve core 106 is fixedly connected to one end of the valve stem 102 located in the valve body 101, a sealing sleeve 107 is fixedly sleeved on the surface of the valve core 106, a limiting mechanism 200 for limiting the position of the valve stem 102 is installed on the surface of the valve body 101 and the valve stem 102, connecting pipes 104 are connected on both sides of the valve body 101, a flange 105 is fixedly sleeved on the end of the connecting pipe 104, and a sealing mechanism 300 matching the pipeline is installed on the flange 105 and the connecting pipe 104.

[0024] Specifically, the gap between the valve body 101 and the valve core 106 is sealed by the sealing sleeve 107 to prevent liquid from leaking from the gap. The rotating valve stem 102, valve handle 103 and valve core 106 are limited by the limiting mechanism 200 to prevent the valve core 106 from rotating under the impact of liquid for a long time, which causes the flow rate to change. The sealing mechanism 300 can seal the pipes connected to the flanges 105 on both sides of the valve. A gap will occur between the seal and the pipe after long-term use. The rotating threaded ring 305 can apply pressure to the sealing gasket 302 to make it in close contact with the pipe, thereby improving the sealing effect.

[0025] In the present invention, the limiting mechanism 200 includes a vertical rod 201 slidably connected to the valve stem 102, the upper end of the vertical rod 201 is fixedly connected to the valve handle 103, the lower end of the vertical rod 201 passes through the valve stem 102 and is fixedly connected to a round block 202, the surface of the round block 202 is fixedly connected to a guide block 203, a guide groove 204 cooperating with the guide block 203 is opened in the valve stem 102, and the guide block 203 is slidably connected in the guide groove 204.

[0026] Specifically, the guide block 203 and the guide groove 204 are used to guide and limit the round block 202 and the vertical rod 201 to prevent the vertical rod 201 from moving up and separating from the valve stem 102. At the same time, when the round rod 303 rotates to drive the round block 202 to rotate, it can drive the valve stem 102 to rotate together, thereby adjusting the rotation angle of the valve core 106 to complete the adjustment of the opening size.

[0027] In the present invention, a spring 205 is sleeved on the surface of the vertical rod 201, and two ends of the spring 205 are respectively connected to the surface of the round block 202 and the inner wall of the valve stem 102.

[0028] Specifically, the circular block 202 can be pressed by the first spring 205, and then the vertical rod 201 can be affected, so that the limiting member 206 is stably inserted into the limiting hole 208 and will not easily come off, thereby positioning the valve stem 102 and the valve core 106 to prevent them from rotating due to impact. When the valve handle 103 is pulled to drive the vertical rod 201, the limiting member 206 and the circular block 202 to move upward, it can proceed normally. The spring is compressed and then exerts pressure after resetting.

[0029] In the present invention, a limiting member 206 is fixedly connected to the surface of the vertical rod 201, and a sleeve 207 is fixedly connected to the top of the valve body 101 and sleeved on the surface of the valve stem 102. A limiting hole 208 that cooperates with the limiting member 206 is provided at the top of the sleeve 207. The limiting member 206 is inserted into the limiting hole 208. The number of limiting holes 208 is several. Inserting the limiting member 206 into different limiting holes 208 serves to position the valve stem 102 and the valve core 106 at different opening positions, representing different opening sizes of the valve.

[0030] In the present invention, the sealing mechanism 300 includes an annular plate 301 movably connected within the flange 105. A sealing gasket 302 is fixedly connected to one side of the annular plate 301. A round rod 303 is slidably connected to the flange 105 and fixedly connected to the other side of the annular plate 301. The movement of the annular plate 301 can drive the sealing gasket 302 to move. The round rod 303 guides and limits the annular plate 301 so that it can only move along its axial direction.

[0031] In the present invention, a thread 304 is fixedly connected to the surface of the connecting pipe 104. A threaded ring 305 is threadedly sleeved on the surface of the thread 304. A first collar 306 is fixedly sleeved on the surface of the round rod 303. A second collar 307 is slidably sleeved on the surface of the round rod 303. A second spring 308 is movably sleeved on the surface of the round rod 303. Both ends of the second spring 308 are in contact with the surfaces of the first collar 306 and the second collar 307 respectively. Through the setting of the thread 304, when the threaded ring 305 is rotated, it moves and then squeezes and pushes the short rod 309 to move, driving the second collar 307 to move to compress the second spring 308. The elastic force generated by the second spring 308 exerts a force on the first collar 306, the round rod 303 and the annular plate 301, and then exerts pressure on the sealing gasket 302, achieving a long-term sealing effect between the flange 105 and the connecting pipe 104. When the efficiency deteriorates, continue to rotate the threaded ring 305 to increase the deformation of the second spring 308 and improve the magnitude of the applied pressure.

[0032] In the present invention, a short rod 309 is fixedly connected to one side of the second collar 307. A ball 310 is embedded at one end of the short rod 309 away from the second collar 307. The ball 310 is in contact with the surface of the threaded ring 305. The friction between the threaded ring 305 and the short rod 309 is reduced through the ball 310, making the rotation of the threaded ring 305 smoother.

[0033] In the present invention, the valve mechanism 100 further includes a movable block 109 provided on the side wall of the valve stem 102. At the upper end of the sleeve 207, there are two limit blocks 108 for restricting the movement range of the movable block 109. The central angle formed between the two limit blocks 108 is 90 degrees. Thus, when the valve stem 102 rotates, blocked and limited by the movable block 109, it can only rotate within a range of 90 degrees, thereby completing the opening and closing of the valve and the adjustment of different sizes.

[0034] Working principle of the present invention: S1. Connect the flange 105 on the valve to the pipeline through bolts and nuts, and then rotate the threaded ring 305 to rotate and move on the thread 304, thereby squeezing and pushing the short rod 309 to move, driving the second collar 307 to move and pressing and compressing the second spring 308; S2. The elastic force generated by the second spring 308 acts on the first collar 306, the round rod 303, and the ring plate 301, thereby pressing the sealing gasket 302 to achieve a long-term sealing effect between the flange 105 and the connecting pipe 104; S3. When it is necessary to adjust the opening size of the valve, hold the valve handle 103 and move it upward to drive the vertical rod 201, the limiting member 206, and the round block 202 to move upward, so that the limiting member 206 disengages from the original limiting hole 208. Then rotate the valve handle 103 to drive the vertical rod 201, the limiting member 206, the round block 202, the guide block 203, and the valve stem 102 to rotate, thereby rotating the valve core 106 to control the opening of the valve; S4. Then release the valve handle 103. Under the action of the rebound of the first spring 205, the valve handle 103, the vertical rod 201, the round block 202, and the guide block 203 are reset, and the limiting member 206 is inserted into the corresponding limiting hole 208 for positioning, avoiding the valve core 106 from rotating due to a large impact, thereby changing the opening size of the valve.

[0035] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0036] The above-described embodiments only represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A valve for adjusting flow rate, comprising a valve mechanism (100), characterized in that: The valve mechanism (100) comprises a valve body (101), a valve stem (102) is provided through the top of the valve body (101), one end of the valve stem (102) located in the valve body (101) is fixedly connected to a valve core (106), a sealing sleeve (107) is fixedly provided on the surface of the valve core (106), a limiting mechanism (200) for limiting the position of the valve stem (102) is installed on the surface of the valve body (101) and the valve stem (102), two sides of the valve body (101) are connected to connecting pipes (104), a flange (105) is fixedly provided at the end of the connecting pipe (104), and a sealing mechanism (300) matching with the pipeline is installed on the flange (105) and the connecting pipe (104).

2. A valve for adjusting flow rate according to claim 1, characterized in that: The limiting mechanism (200) comprises a vertical rod (201) slidably connected to the valve stem (102); the upper end of the vertical rod (201) is fixedly connected to the valve handle (103); the lower end of the vertical rod (201) passes through the valve stem (102) and is fixedly connected to a round block (202); the surface of the round block (202) is fixedly connected to a guide block (203); a guide groove (204) cooperating with the guide block (203) is provided in the valve stem (102); and the guide block (203) is slidably connected in the guide groove (204).

3. A valve for adjusting flow rate according to claim 2, characterized in that: A spring 1 (205) is sleeved on the surface of the vertical rod (201), and two ends of the spring 1 (205) are respectively connected to the surface of the round block (202) and the inner wall of the valve stem (102).

4. A valve for adjusting flow rate according to claim 3, characterized in that: The surface of the vertical rod (201) is fixedly connected to a limiting member (206); the top of the valve body (101) is fixedly connected to a sleeve (207) which is sleeved on the surface of the valve stem (102); the top of the sleeve (207) is provided with a plurality of limiting holes (208) which cooperate with the limiting member (206); the limiting member (206) is inserted into the limiting holes (208).

5. A valve for adjusting flow rate according to claim 1, characterized in that: The sealing mechanism (300) comprises a ring plate (301) movably connected to the flange (105), a sealing gasket (302) being fixedly connected to one side of the ring plate (301), and a round rod (303) being slidably connected to the flange (105) and fixedly connected to the other side of the ring plate (301).

6. A valve for adjusting flow rate according to claim 5, characterized in that: The surface of the connecting pipe (104) is fixedly connected with a threaded thread (304), the surface of the threaded thread (304) is threadedly sleeved with a threaded ring (305), the surface of the round rod (303) is fixedly sleeved with a first collar (306), the surface of the round rod (303) is slidably sleeved with a second collar (307), and the surface of the round rod (303) is movably sleeved with a second spring (308), and the two ends of the second spring (308) are in contact with the surfaces of the first collar (306) and the second collar (307) respectively.

7. A valve for adjusting flow rate according to claim 6, characterized in that: A short rod (309) is fixedly connected to one side of the second sleeve ring (307), and a ball (310) is embedded in one end of the short rod (309) away from the second sleeve ring (307), and the ball (310) is in contact with the surface of the threaded ring (305).

8. A valve for adjusting flow rate according to claim 4, characterized in that: The valve mechanism (100) further comprises a movable block (109) arranged on the side wall of the valve stem (102), and the upper end of the sleeve (207) is provided with two limit blocks (108) for limiting the movement range of the movable block (109).

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