Ball valve capable of reducing abrasion of valve element

Abstract

The invention belongs to the technical field of valves, and particularly relates to a ball valve capable of reducing valve element abrasion, which comprises a valve body, fluid pipelines fixedly connected with two ends of the valve body, a valve element arranged in the valve body, a transmission shaft fixedly connected with the top of the valve element, and a valve rod fixedly mounted at the end part of the transmission shaft, a gap is reserved between the valve element and the valve body, the valve element and the valve body are not attached, four annular grooves distributed in an annular array mode are formed in the peripheral face of the valve element, the central axes of two of the annular grooves coincide with the central axis of the fluid channel, and the fluid channel is sleeved with the annular grooves. A gap is formed between the valve element and the valve body and is not attached to the valve element, so that the problem of abrasion in the prior art is solved, and the service life is prolonged; after the valve element is rotated by 90 degrees to be opened, the poke rod is rotated again to drive the first ring to be inserted into the annular groove, so that the fluid channel, the second ring, the corrugated pipe and the fluid pipeline jointly form a channel for liquid circulation, and the sealing performance of liquid flowing is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, and in particular relates to a ball valve capable of reducing valve core wear. Background Art

[0002] In the prior art, most natural gas transmission pipelines, oil pipelines and water supply pipelines use ball valves to control the delivery of fluids. Most ball valves achieve sealing through the cooperation of a valve seat installed in a valve body and a ball.

[0003] In the application of the prior art, according to patent CN208058002U, a ball valve is disclosed, including a valve body, a valve core installed in the valve body, and a control valve stem installed on the valve core, and also includes a handle assembly installed on the control valve stem, the handle assembly includes a rotating plate for adjusting the rotation of the control valve stem and a locking plate for limiting the rotation of the control valve stem, the valve body has a limit column, the locking plate is provided with a limit through hole for inserting the limit column and an installation through hole for inserting the control valve stem and limiting the rotation of the control valve stem. Although the handle assembly can prevent misoperation and improve the safety performance of the ball valve, when the ball rotates, the valve seat is extremely susceptible to wear and the service life needs to be improved.

[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention

[0005] The purpose of the present invention is to design a ball valve that is not prone to wear when opening and closing, has a longer service life, and can still achieve the switching and closing effects to reduce the wear of the ball valve, so as to solve the above-mentioned deficiencies in the technology.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a ball valve for reducing valve core wear, comprising a valve body, a fluid pipeline fixedly connected at both ends of the valve body, a valve core arranged in the valve body, a transmission shaft fixedly connected to the top of the valve core, and a valve stem fixedly installed at the end of the transmission shaft, a fluid channel is opened inside the valve core, there is a gap between the valve core and the valve body, and there is no fit, four annular grooves distributed in an annular array are opened on the outer peripheral surface of the valve core, wherein the center axes of two annular grooves coincide with the center axes of the fluid channel, the annular grooves are sleeved outside the fluid channel, and a guide ring is slidably connected inside the fluid inlet and the fluid outlet, and the guide ring is inserted into the annular groove to limit the rotation of the valve core in the valve body, so that the fluid inlet and the fluid outlet are connected or closed to the fluid channel together.

[0007] Preferably, the guide ring is fixedly connected to a bellows at one end away from the valve core, the bellows is fixedly connected to a limit tube at one end away from the guide ring, the fiber tube is fixedly connected to an adjacent fluid pipeline, and the guide ring is axially slidably connected to the limit tube.

[0008] Preferably, the guide ring includes a first ring inserted into the annular groove, a second ring fixedly connected to the end of the first ring, and a third ring fixedly connected to one end of the second ring away from the first ring. The cross-sectional shape of the limiting tube is set to be L-shaped, and the third ring is slidably connected between the fluid pipeline and the limiting tube.

[0009] Preferably, a transmission groove is provided on the outer circumferential surface of the third ring, a rack is provided on the side of the transmission groove, a gear is meshed on one side of the rack, a connecting shaft is fixedly connected to the top of the gear, the connecting shaft passes through the fluid pipeline and is rotatably connected to the fluid pipeline; by rotating the transmission shaft, the axial sliding of the third ring in the fluid pipeline can be controlled by the cooperation between the gear and the rack.

[0010] Preferably, a polygonal column is fixedly connected to the top of the connecting shaft, an upper baffle is fixedly connected to the top of the polygonal column, a toggle rod is slidably connected to the outside of the polygonal column, the toggle rod passes through and is slidably connected to a limiting column at one end away from the polygonal column, a lower baffle is fixedly connected to the middle of the limiting column, and when the toggle rod slides into the limiting column, the first ring is inserted into the annular groove and fits with the top.

[0011] Preferably, the valve stem is penetrated by two through holes with an angle of 90°, a hollow column fixedly connected to the surface of the valve body is arranged below the through holes, and a positioning rod is inserted into the hollow column.

[0012] Preferably, the inner diameter of the fluid channel is consistent with the inner diameter of the second ring.

[0013] Preferably, a rubber gasket is placed in the annular groove.

[0014] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0015] 1. By leaving a gap between the valve core and the valve body and rotating the valve core after the guide ring is separated from the valve core, the valve core does not rub against the outside when rotating, thereby avoiding the wear problem in the prior art and thus improving the service life;

[0016] 2. After the valve core is turned 90° to open, turn the toggle lever again to drive the first ring to insert into the annular groove, so that the fluid channel, the second ring, the bellows, and the fluid pipeline together form a channel for liquid circulation to ensure the sealing of liquid flow;

[0017] 3. This product uses a limit column inserted into the toggle rod to prevent the guide ring from moving in the opposite direction, resulting in insufficient sealing. By inserting the positioning rod into the through hole and the hollow column, it can ensure that the valve core will not rotate and prevent the valve core from being rotated by liquid flushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the disassembly of the external structure of the valve body of the present invention;

[0021] Figure 3 is a cross-sectional view of a valve body of the present invention;

[0022] Figure 4 It is a partial cross-sectional view of the present invention;

[0023] Figure 5 It is a schematic diagram of the connection between the guide ring and the gear of the present invention.

[0024] Description of reference numerals:

[0025] 1. Valve body; 2. Fluid pipeline; 3. Valve core; 4. Transmission shaft; 5. Valve stem; 6. Fluid channel; 7. Annular groove; 8. Guide ring; 801. First ring; 802. Second ring; 803. Third ring; 9. Bellows; 10. Limiting tube; 11. Transmission groove; 12. Rack; 13. Gear; 14. Connecting shaft; 15. Polygonal column; 16. Upper baffle; 17. Toggle rod; 18. Limiting column; 19. Lower baffle; 20. Through hole; 21. Hollow column; 22. Positioning rod; 23. Rubber gasket. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Example:

[0029] like Figure 1-5As shown, it includes a valve body 1, a fluid pipeline 2 fixedly connected at both ends of the valve body 1, a valve core 3 arranged in the valve body 1, a transmission shaft 4 fixedly connected to the top of the valve core 3, and a valve stem 5 fixedly installed at the end of the transmission shaft 4, a fluid channel 6 is opened inside the valve core 3, and there is a gap between the valve core 3 and the valve body 1, and the outer peripheral surface of the valve core 3 is opened with four annular grooves 7 distributed in an annular array, wherein the central axes of two annular grooves 7 coincide with the central axes of the fluid channel 6, a first ring 801 is inserted into the annular groove 7, a second ring 802 is fixedly connected to the end of the first ring 801, and a third ring 803 is fixedly connected to the end of the second ring 802 away from the first ring 801, and the inner ring of the third ring 803 is slidably connected to a limiting tube 10 with an L-shaped cross-section fixedly connected to the inner wall of the fluid pipeline 2, a bellows 9 is fixedly connected between the limiting tube 10 and the second ring 802, and the outer periphery of the third ring 803 A transmission groove 11 is opened on the surface, a rack 12 is opened on the side of the transmission groove 11, a gear 13 is meshed on one side of the rack 12, a connecting shaft 14 is fixedly connected to the top of the gear 13, the connecting shaft 14 passes through the fluid pipeline 2 and is rotatably connected to the fluid pipeline 2, a polygonal column 15 is fixedly connected to the top of the connecting shaft 14, an upper baffle 16 is fixedly connected to the top of the polygonal column 15, a toggle rod 17 is slidably connected to the outside of the polygonal column 15, the toggle rod 17 passes through and slidably connects to a limiting column 18 at one end away from the polygonal column 15, a lower baffle 19 is fixedly connected to the middle of the limiting column 18, when the toggle rod 17 slides into the limiting column 18, the first ring 801 is inserted into the annular groove 7 and fits with the top, two through holes 20 with an angle of 90° are penetrated inside the valve stem 5, a hollow column 21 fixedly connected to the surface of the valve body 1 is arranged below the through hole 20, and a positioning rod 22 is inserted into the hollow column 21;

[0030] When in use, if the user wants to open the valve, the user rotates the toggle rod 17, the toggle rod 17 drives the polygonal column 15 to rotate, the polygonal column 15 drives the connecting shaft 14, the connecting shaft 14 drives the gear 13 to rotate, the gear 13 meshes with the rack 12, the rack 12 drives the third ring 803 to move, the third ring 803 drives the second ring 802 to move, and then drives the first ring 801 to slide out of the annular groove 7. At this time, the second ring 802 will also compress the bellows 9. When the toggle rod 17 cannot be rotated, the positioning rod 22 in the hollow column 21 is pulled out, and then the valve stem 5 is rotated, the valve stem 5 will drive the transmission shaft 4 to rotate, and the transmission The shaft 4 drives the valve core 3 to rotate. When the two through holes 20 on the valve stem 5 are aligned with the two hollow columns 21, it means that the fluid channel 6 and the fluid pipeline 2 overlap. At this time, the positioning rod 22 can be inserted into one of the hollow columns 21. Then, the toggle rod 17 is rotated in the opposite direction until it cannot be rotated. At this time, the end of the toggle rod 17 is just above the limit column 18. The toggle rod 17 is pressed to insert the limit column 18 into the toggle rod 17. At this time, the first ring 801 is inserted into the annular groove 7 and fits with the rubber gasket 23, so that the fluid channel 6, the second ring 802, the bellows 9, and the fluid pipeline 2 together form a channel for liquid circulation;

[0031] When you want to close the valve, just reverse the above steps.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.

[0033] The above specific implementation methods or cases are only used to explain the technical solutions of the present invention, and are not intended to limit the present application. Any parts not described in detail are deemed to be conventional technical means or common knowledge in the field. It can be understood by ordinary technicians in this field that: based on the design concept of the present application, the technical solutions recorded in the aforementioned implementation methods should be adaptively modified, or some or all of the technical features therein should be replaced by equivalents. These modifications, equivalent replacements, and adaptively improved technical solutions do not depart from the technical essence of the present invention and should all be covered within the protection scope of the present application.

Claims

1. A ball valve for reducing valve core wear, comprising a valve body (1), a fluid pipeline (2) fixedly connected to both ends of the valve body (1), a valve core (3) arranged in the valve body (1), a transmission shaft (4) fixedly connected to the top of the valve core (3), and a valve stem (5) fixedly installed at the end of the transmission shaft (4), wherein a fluid channel (6) is opened inside the valve core (3), and characterized in that: There is a gap between the valve core (3) and the valve body (1), and the valve core (3) is provided with four annular grooves (7) distributed in an annular array on its outer peripheral surface, wherein the central axes of two of the annular grooves (7) coincide with the central axes of the fluid channel (6), the annular grooves (7) are sleeved outside the fluid channel (6), and a guide ring (8) is slidably connected inside the fluid inlet and the fluid outlet, and the guide ring (8) is inserted into the annular groove (7) to limit the valve core (3) from rotating in the valve body (1), so that the fluid inlet and the fluid outlet are connected to or closed with the fluid channel (6).

2. A ball valve for reducing valve core wear according to claim 1, characterized in that: The end of the guide ring (8) away from the valve core (3) is fixedly connected to a bellows (9), the end of the bellows (9) away from the guide ring (8) is fixedly connected to a limit tube (10), the limit tube (10) is fixedly connected to an adjacent fluid pipeline (2), and the guide ring (8) is axially slidably connected to the limit tube (10).

3. A ball valve for reducing valve core wear according to claim 2, characterized in that: The guide ring (8) comprises a first ring (801) inserted into the annular groove (7), a second ring (802) fixedly connected to the end of the first ring (801), and a third ring (803) fixedly connected to one end of the second ring (802) away from the first ring (801), the cross-sectional shape of the limiting tube (10) is set to be L-shaped, and the third ring (803) is slidably connected between the fluid pipeline (2) and the limiting tube (10).

4. A ball valve for reducing valve core wear according to claim 3, characterized in that: The outer circumferential surface of the third ring (803) is provided with a transmission groove (11), the side of the transmission groove (11) is provided with a rack (12), one side of the rack (12) is meshed with a gear (13), the top of the gear (13) is fixedly connected with a connecting shaft (14), the connecting shaft (14) passes through the fluid pipeline (2) and is rotatably connected to the fluid pipeline (2); by rotating the transmission shaft (4), the third ring (803) can be controlled to slide axially in the fluid pipeline (2) through the cooperation between the gear (13) and the rack (12).

5. A ball valve for reducing valve core wear according to claim 4, characterized in that: The top end of the connecting shaft (14) is fixedly connected to a polygonal column (15), the top end of the polygonal column (15) is fixedly connected to an upper baffle (16), the outside of the polygonal column (15) is slidably connected to a toggle rod (17), one end of the toggle rod (17) away from the polygonal column (15) passes through and is slidably connected to a limiting column (18), the middle part of the limiting column (18) is fixedly connected to a lower baffle (19), when the toggle rod (17) slides onto the limiting column (18), the first ring (801) is inserted into the annular groove (7) and fits with the top end.

6. A ball valve for reducing valve core wear according to claim 1, characterized in that: The valve stem (5) is penetrated by two through holes (20) with an included angle of 90 degrees, a hollow column (21) fixedly connected to the surface of the valve body (1) is arranged below the through hole (20), and a positioning rod (22) is inserted into the hollow column (21).

7. A ball valve for reducing valve core wear according to claim 3, characterized in that: The inner diameter of the fluid channel (6) is consistent with the inner diameter of the second ring (802).

8. A ball valve for reducing valve core wear according to claim 1, characterized in that: A rubber gasket (23) is placed in the annular groove (7).

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