A lined three-way non-stagnant ball valve and its manufacturing process

Abstract

The present invention discloses a lined three-way non-retention ball valve, which includes an upper valve body and further includes: a lower valve body, the upper valve body and the lower valve body are fixed by inner hexagon bolts; a lined valve seat, a positioning seat is arranged inside the lined valve seat; a ball core, a through port is arranged on the ball core; a four-corner groove, the four-corner groove is engaged with the end of the handle; a channel, a limiting member is arranged on the inner wall of the channel. In the present invention, when the limiting blocks are subjected to the pressure of the liquid, the spring will be gradually compressed, and the limiting blocks will approach each other, so that the connection port is communicated with the channel. At this time, the liquid can flow away through the ball core. Therefore, the liquid is prevented from remaining inside the ball valve, and the liquid can be prevented from leaking. When the liquid source is closed, the hydraulic pressure decreases accordingly. Therefore, the force exerted by the spring on the limiting blocks closes the channel, preventing the remaining liquid from continuing to flow into the ball valve interior.

Description

Technical Field

[0001] The present invention relates to the technical field of ball valves, and in particular to a three-way ball valve with a lined inner wall and no liquid retention and its manufacturing process. Background Art

[0002] Three-way ball valves are of type T and type L. The T-type can connect three orthogonal pipelines to each other and cut off the third pipeline, playing a role of shunting and merging. The L-type three-way ball valve can only connect two orthogonal pipelines and cannot maintain the interconnection of the third pipeline at the same time, only playing a distribution role. Ball valves and gate valves belong to the same type of valves. The difference is that its closing part is a sphere, and the sphere rotates around the center line of the valve body to achieve opening and closing. Ball valves are mainly used to cut off, distribute and change the flow direction of the medium in pipelines. Ball valves are a widely used new type of valve.

[0003] When the liquid in the ball valve is connected, liquid leakage will occur, which will affect the normal use of the ball valve. The remaining liquid staying in the ball valve for a long time will corrode the internal mechanism. Therefore, improvement is needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a three-way ball valve with a lined inner wall and no liquid retention and its manufacturing process to solve the above problems.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A three-way ball valve with a lined inner wall and no liquid retention, including an upper valve body, and further including:

[0007] A lower valve body, which is fixed to the upper valve body by an inner hexagon bolt;

[0008] A lined valve seat, in which a positioning seat is provided;

[0009] A ball core, on which a flow port is provided;

[0010] A four-corner groove, which is engaged with the end of the handle;

[0011] A channel, on the inner wall of which a limiting member is provided;

[0012] A connection port, through which the channel is communicated with the connection port.

[0013] As a further description of the above technical solution:

[0014] The limiting member includes a fixed block, a groove is formed in the fixed block, a limiting rod is fixedly connected in the groove, a slider is sleeved on the limiting rod, one end of a rotating rod is hinged to the side wall of the slider, the other end of the rotating rod is hinged to a limiting block, both ends of the limiting block slide in a sliding groove, and a spring is welded between the fixed block and the limiting block.

[0015] As a further description of the above technical solution:

[0016] A gasket that is slidably connected to the ball core is provided inside the inner lining valve seat.

[0017] As a further description of the above technical solution:

[0018] An elastic rubber ring is provided on the side wall of the limiting block.

[0019] As a further description of the above technical solution:

[0020] The inner wall of the sliding groove is smooth and provided with a wear-resistant layer.

[0021] As a further description of the above technical solution:

[0022] A manufacturing process for an inner lining three-way non-retention ball valve includes the following steps:

[0023] Material selection: Select 410 stainless steel sheet as the blank, calculate the size according to the size of the valve core, and then cut the blank with a cutting machine according to the calculated target size;

[0024] Solution treatment: Perform solution treatment on the processed round tube, keep the temperature at 800°C - 900°C for 30 minutes or more, and then quickly cool it;

[0025] Drawing: Place the polished blank on the mold, turn on the mold closing machine, heat up to 550°C - 650°C, perform the first hot drawing, perform the above solution treatment step after the first hot drawing, then place the blank on the mold for the second hot drawing, and perform the third hot drawing and sizing on the blank after the second hot drawing until a regular spherical shell is obtained, and perform pressure holding treatment during the third hot drawing and sizing;

[0026] Insert the inner straight pipe: Select a 410 stainless steel pipe with a through hole in the middle and an outer diameter smaller than the diameter of the spherical shell, cut it to the same length as the diameter of the spherical shell, use a conical punch on a punching machine or a stamping machine to punch and expand the inner straight pipe, so that the inner straight pipe is fixedly connected to the spherical shell to form a finished valve core;

[0027] Polishing: Perform surface polishing to polish off the burrs and polish;

[0028] Cleaning: Put the made valve core into an acid solution for about ten minutes, and finally take it out and rinse.

[0029] Primer spraying: Spray / roll the primer on the surface. The primer is white corundum sand grains, and it is dried for half an hour, and then the wear-resistant tungsten carbide coating is sprayed.

[0030] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0031] 1. In the present invention, when the limiting blocks are subjected to the pressure of the liquid, the springs will be gradually compressed, and the limiting blocks will approach each other, so that the connection ports are communicated with the channels. At this time, the liquid can flow away through the ball core. Therefore, the liquid is prevented from remaining inside the ball valve, and the liquid cannot leak. When the liquid source is closed, the hydraulic pressure decreases. Therefore, the force given by the spring to the limiting blocks closes the channels, preventing the remaining liquid from continuing to flow into the ball valve.

[0032] 2. In the present invention, under the action of the handle, the ball core rotates. The flow ports opened in the ball core play a role in changing the position of the liquid flowing out of the ball valve. Therefore, the user can adjust the operation according to actual needs, which is relatively convenient and fast, and can reduce the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Shows the external structure schematic diagram of the ball valve provided by the embodiment of the present invention;

[0034] Figure 2 Shows the internal lining valve seat structure schematic diagram provided by the embodiment of the present invention;

[0035] Figure 3 Shows the ball core structure schematic diagram provided by the embodiment of the present invention;

[0036] Figure 4 Shows the handle structure schematic diagram provided by the embodiment of the present invention.

[0037] Legend:

[0038] 1. Upper valve body; 2. Lower valve body; 3. Hexagon socket head cap screw; 4. Internal lining valve seat; 5. Ball core; 6. Square groove; 7. Flow port; 8. Handle; 9. Channel; 10. Gasket; 11. Positioning seat; 12. Fixed block; 13. Groove; 14. Limiting rod; 15. Slide block; 16. Rotating rod; 17. Limiting block; 18. Slide groove; 19. Spring; 20. Connection port. DETAILED DESCRIPTION OF THE INVENTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] Please refer to Figures 1-4 , the present invention provides a technical solution: an inner-lined three-way non-retention ball valve, including an upper valve body 1, and further including:

[0041] A lower valve body 2, and the upper valve body 1 and the lower valve body 2 are fixed by inner hexagon bolts 3;

[0042] An inner-lined valve seat 4, and a positioning seat 11 is arranged inside the inner-lined valve seat 4;

[0043] A ball core 5, and a flow port 7 is opened on the ball core 5;

[0044] A four-corner groove 6, and the four-corner groove 6 is engaged with the end of a handle 8;

[0045] A channel 9, and a limiting member is arranged on the inner wall of the channel 9;

[0046] A connection port 20, and the channel 9 is communicated with the connection port 20.

[0047] The limiting member includes a fixing block 12, a groove 13 is opened inside the fixing block 12, a limiting rod 14 is fixedly connected inside the groove 13, a slider 15 is sleeved on the limiting rod 14, one end of a rotating rod 16 is hinged to the side wall of the slider 15, the other end of the rotating rod 16 is hinged to a limiting block 17, both ends of the limiting block 17 slide in a sliding groove 18, the inner wall of the sliding groove 18 is smooth and provided with a wear-resistant layer, and a spring 19 is welded between the fixing block 12 and the limiting block 17.

[0048] A washer 10 which is slidably connected with the ball core 5 is arranged inside the inner-lined valve seat 4, and the washer 10 plays a role in protecting the ball core 5 to prevent the ball core 5 from being worn during rotation.

[0049] An elastic rubber ring is arranged on the side wall of the limiting block 17, which can play an internal sealing effect on the channel 9 to prevent liquid from flowing into the inside when the ball valve is not in use.

[0050] A manufacturing process of an inner-lined three-way non-retention ball valve includes the following steps:

[0051] Material selection: Select 410 stainless steel plate as the blank, calculate the size according to the size of the valve core, and then cut the blank with a cutting machine according to the calculated target size;

[0052] Solution treatment: The processed round tube is subjected to solution treatment, maintaining the temperature at 800°C - 900°C for 30 minutes or more, and then rapidly cooled;

[0053] Drawing: Place the polished blank on the mold, start the mold closing machine, heat up to 550°C - 650°C, and perform the first hot drawing. After the first hot drawing, perform the above solution treatment steps. Then place the blank on the mold for the second hot drawing, and perform the third hot drawing and sizing on the blank after the second hot drawing until a regular spherical shell is obtained. Perform pressure holding treatment during the third hot drawing and sizing;

[0054] Insert the inner straight tube: Select a 410 stainless steel tube with a through hole in the middle and an outer diameter smaller than the through diameter of the spherical shell, cut it to the same length as the through diameter of the spherical shell, and use a conical punch on a punching machine or a stamping machine to punch and expand the inner straight tube so that the inner straight tube is fixedly connected to the spherical shell to form a finished valve core;

[0055] Polishing: Perform surface polishing to polish off the burrs and polish;

[0056] Cleaning: Place the made valve core in an acid solution for about ten minutes, and finally take it out and rinse;

[0057] Primer spraying: Spray / roll coat the primer on the surface. The primer is white corundum sand grains, and dry for half an hour, and then spray the tungsten carbide wear-resistant coating.

[0058] Working principle: When in use, turn the handle 8 to connect the internal channel 9 of the ball valve. The liquid gives pressure to the limit block 17 through the channel 9. Therefore, the limit block 17 gradually approaches the fixed block 12. At this time, the spring 19 is compressed, the rotating rod 16 rotates, and the slider 15 moves upward under the restriction of the limit rod 14. Therefore, the limit block 17 close to the ball core 5 gradually moves away from the ball core 5, and the channel 9 is connected to the connection port 20. The liquid can flow away through the flow port 7 opened on the ball core 5. When the source of the flowing liquid is closed and the hydraulic pressure drops, the limit block 17 closes the connection port 20 under the action of the spring 19 to prevent liquid from remaining inside the ball valve and causing leakage.

[0059] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A lined three-way non-retention ball valve, comprising an upper valve body (1), characterized in that, Further comprising: A lower valve body (2), the upper valve body (1) and the lower valve body (2) are fixed by an inner hexagonal bolt (3); a lining valve seat (4), a positioning seat (11) is arranged inside the lining valve seat (4); a ball core (5), a flow port (7) is arranged on the ball core (5); a four-corner groove (6), the four-corner groove (6) is engaged with the end of a handle (8); a channel (9), a limiting member is arranged on the inner wall of the channel (9); a connection port (20), the channel (9) is communicated with the connection port (20); the limiting member includes a fixed block (12), a groove (13) is opened in the fixed block (12), a limiting rod (14) is fixedly connected in the groove (13), a slider (15) is sleeved on the limiting rod (14), one end of the side wall of the slider (15) is hinged to one end of a rotating rod (16), the other end of the rotating rod (16) is hinged to a limiting block (17), both ends of the limiting block (17) slide in a sliding groove (18), and a spring (19) is welded between the fixed block (12) and the limiting block (17); A washer (10) which is slidably connected with the ball core (5) is arranged inside the lining valve seat (4); an elastic rubber ring is arranged on the side wall of the limiting block (17); the inner wall of the sliding groove (18) is smooth and provided with a wear-resistant layer.

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