A ball valve structure with a double ball core

Abstract

The present invention relates to the technical field of pipeline valves, and discloses a ball valve structure with a double ball core, including a conveying pipe, a regulating pipe, a ball core assembly, an adjusting member and a regulating member. The conveying pipe and the regulating pipe are arranged vertically and crosswise in a cross shape and communicate with each other. An input interface is provided at one end of the conveying pipe. By pushing the adjusting rod, the ball core assembly moves downward in the regulating pipe, the first ball core replaces the position of the second ball core, and is inserted into the corresponding positioning hole through a positioning pin to fix the position of the ball core, so that the first ball core continuously maintains the flow operation in the conveying pipe, while the second ball core enters the deep part of the regulating pipe. After removing the lower cap, the second ball core is removed from the connecting rod for replacement, and after being reinstalled inside, the adjusting rod is pulled upward to make the replaced second ball core return to the initial position to complete the subsequent flow circulation and blocking operations, so that the ball core replacement operation can be completed without stopping the flow supply, effectively saving the maintenance time.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline valves, and particularly to a ball valve structure with a double ball core. Background Art

[0002] A ball valve is a control valve widely used in pipeline systems. Its structure is similar to a hollow sphere. The valve controls the flow of fluid by rotating the sphere. The basic structure of a ball valve includes a valve body, a valve ball, a valve seat, a driving device, etc. It adjusts the flow rate by rotating the hole on the sphere. There are usually two types: full-bore ball valves and reduced-bore ball valves. Ball valves can be used to control various fluids such as water, gas, and oil, and can achieve quick opening and closing, avoiding continuous fluid flow or leakage. The main characteristics of ball valves are good sealing performance, low flow resistance, and rapid opening and closing, so they are applied in many industrial fields.

[0003] At present, the ball valves at the present stage adopt a single ball core structure. The ball core is pressed on the valve seat, and the side of the ball core is attached to the inner wall of the valve body. The liquid flow and blockage are realized by rotating the ball core. However, during the rotation of the ball core, large friction is generated between the ball core and the valve seat and the inner wall of the valve body. Over time, the ball core is severely worn, thus reducing the sealing performance between the ball core and the valve body. When the ball core is damaged, it is necessary to close the upstream valve, stop the fluid supply to the pipeline of this ball valve, then disassemble the ball valve, replace the internal ball core, and then carry out the liquid flow operation. There is complexity in operation, and it is necessary to shut off the pipeline supply, which causes economic losses in terms of time for the manufacturer. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides a ball valve structure with a double ball core, which has the advantages of being able to replace the ball core without stopping the flow supply, etc., and solves the problem that in the current single ball core design, when the ball core is damaged, it is necessary to close the upstream valve to stop the fluid supply to the connected pipeline before the ball core replacement operation can be carried out, resulting in a large economic loss.

[0006] II Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solution: A ball valve structure with a double ball core, including a conveying pipe, a regulating pipe, a ball core assembly, an adjusting member, and a regulating member. The conveying pipe and the regulating pipe are vertically cross-set in a cross shape, and the inside of the conveying pipe and the regulating pipe is interconnected. The position where the conveying pipe and the regulating pipe intersect is interconnected, so that the ball core assembly can move in the regulating pipe and can dock with the conveying pipe using different ball cores to achieve the liquid flow and blockage operations.

[0008] One end of the delivery pipe is provided with an input interface, and the other end of the delivery pipe is provided with an output interface. Liquid is input into the delivery pipe through the input interface and then output outward through the output interface into the connected pipe.

[0009] The bottom of the regulating pipe is threadedly connected with a lower cap, and the top of the regulating pipe is threadedly connected with an upper cap. At the same time, a ball core assembly is movably connected inside the regulating pipe. The lower cap is used to seal the interface at the bottom of the regulating pipe, and the upper cap is used to seal the interface at the top of the regulating pipe, so that when the ball core assembly moves up and down in the regulating pipe, it is prevented from disengaging from the interface of the regulating pipe.

[0010] The ball core assembly consists of a first ball core and a second ball core. Flow grooves are penetrated through the sides of the first ball core and the second ball core. A central cushion block is movably connected between the first ball core and the second ball core. The top and bottom of the central cushion block are circularly concave and fit against the sides of the first ball core and the second ball core. A circular hole is penetrated through the center position of the central cushion block, and a connecting rod is rotatably connected in the circular hole. Connecting holes are formed on the opposite surfaces of the first ball core and the second ball core, and the two ends of the connecting rod are respectively threadedly connected in the corresponding connecting holes. The first ball core is a spare ball core, and the second ball core is the main ball core. When the second ball core is replaced, the first ball core is used to replace the position of the second ball core for liquid circulation and blocking operations.

[0011] The first ball core and the second ball core are connected by a connecting rod. When the first ball core rotates, it can drive the second ball core to rotate simultaneously. Thus, whether the first ball core is aligned with the inside of the delivery pipe or the second ball core is aligned with the inside of the delivery pipe, the liquid circulation and blocking operations in the delivery pipe can be achieved by rotation.

[0012] The first ball core and the second ball core have the same diameter, and the positions of the flow grooves penetrated through their sides are aligned. Moreover, the diameter inside the flow grooves is the same as the diameter inside the delivery pipe. When the flow grooves are vertically aligned with the delivery pipe, liquid circulation is achieved. When the first ball core and the second ball core are rotated to make the flow grooves perpendicular to the delivery pipe, liquid blocking is achieved.

[0013] The ball core assembly further includes an upper cushion block and a lower cushion block movably sleeved inside the regulating pipe. The opposite surfaces of the upper cushion block and the lower cushion block are circularly concave and respectively fit against the sides of the first ball core and the second ball core. The bottom of the upper cushion block fits against the first ball core, and the top of the lower cushion block fits against the bottom of the second ball core. The first ball core and the second ball core can be stably fitted in the concave surfaces of the central cushion block, the upper cushion block and the lower cushion block, improving the stability of the rotation and movement of the first ball core and the second ball core.

[0014] An adjusting member for adjusting the height of the ball core assembly is installed on the first ball core. The adjusting member includes an adjusting rod fixed on the first ball core. The adjusting rod is movably sleeved at the central position of the upper cover cap. When the adjusting rod is pulled upward to the limit, the second ball core is located inside the conveying pipe. When the adjusting rod is pushed downward to the limit, the first ball core is located inside the conveying pipe.

[0015] A regulating member for controlling the adjusting rod to drive the first ball core and the second ball core to rotate, so as to realize the regulation of fluid flow and cut-off is movably connected to the upper cover cap.

[0016] The working principle of the ball valve structure with a double ball core proposed in this embodiment is as follows: during use, by pushing the adjusting rod downward, the first ball core is located inside the conveying pipe, and the positioning slide button is pushed to make the positioning pin inserted into the corresponding positioning hole on the side of the adjusting rod. At this time, by rotating the valve wrench, the first ball core and the second ball core rotate simultaneously, so that both ends of the flow channel conveying pipe are connected, thereby enabling the liquid to be input from the input interface into the conveying pipe and output from the output interface.

[0017] When replacing the ball core, by rotating the valve wrench, the ball core rotates. At this time, the flow channel of the first ball core is not connected to the conveying pipe. Then, by pulling the positioning slide button, the positioning pin is disengaged from the positioning hole. At this time, the adjusting rod is pulled upward, and under the push of the tension spring, the second ball core is located inside the conveying pipe. Then, the positioning slide button is pushed to make the positioning pin inserted into the corresponding positioning hole, and then the valve wrench is rotated, so that the first ball core and the second ball core rotate. At this time, the flow channel of the second ball core is connected to the inside of the conveying pipe, realizing the liquid flow operation.

[0018] As a further improvement of the above solution, limiting sliding grooves are opened at both ends inside the regulating pipe. At the same time, limiting sliding blocks are arranged on the sides of the upper cushion block and the lower cushion block, and the limiting sliding blocks are slidably connected in the limiting sliding grooves.

[0019] Through the above technical solution, when the upper cushion block and the lower cushion block move up and down inside the regulating pipe, the limiting sliding blocks slide in the limiting sliding grooves, improving the overall stability of the ball core assembly moving up and down, and at the same time restricting the central cushion block, the upper cushion block and the lower cushion block from rotating.

[0020] As a further improvement of the above solution, a tension spring is installed between the bottom of the lower cushion block and the lower cover cap.

[0021] Through the above technical solution, the tension spring is used to push the lower cushion block upward, so that the second ball core returns to the initial position and the second ball core is aligned with the inside of the conveying pipe.

[0022] As a further improvement of the above solution, an annular groove is opened on the side of the central cushion block, and a high-density sponge sheet is fixed in the annular groove. The high-density sponge sheet is attached to the inner side of the regulating pipe.

[0023] Through the above technical solution, lubricant is absorbed in the high-density sponge sheet. When the first ball core and the second ball core are switched, the high-density sponge sheet applies lubricant to the inner wall of the connection position between the ball core and the conveying pipe, thereby reducing the friction resistance between the ball core and the inner wall of the pipe, and improving the operating smoothness of the upper adjustment member and the adjustment control unit.

[0024] As a further improvement of the above solution, a limiting button is fixed on the adjusting rod, and the limiting button can fit on the upper cover cap at a set height.

[0025] Through the above technical solution, by pushing the limiting button downward, the limiting button fits on the upper cover cap, so that the first ball core is aligned with the inside of the delivery tube.

[0026] As a further improvement of the above solution, the adjustment control unit includes a connecting ring rotatably connected to the upper cover cap, and the adjustment rod is movably sleeved in the connecting ring.

[0027] Through the above technical solution, the diameter of the adjusting rod is consistent with the diameter inside the connecting ring, thereby improving the stability of the rotation of the adjusting rod.

[0028] As a further improvement of the above solution, a convex button is provided on the side of the connecting ring, and a valve wrench is movably connected to the side of the connecting ring. Connecting heads are oppositely provided on both sides of one end of the valve wrench, and the connecting heads are fixed on the convex button.

[0029] Through the above technical solution, the connecting ring is rotated by turning the valve wrench, and when the positioning pin is inserted into the positioning hole, the connecting ring can drive the adjusting rod to rotate, so that the first ball core and the second ball core rotate.

[0030] As a further improvement of the above solution, a sleeve is fixed at the bottom of the valve wrench, and a positioning pin is movably sleeved in the sleeve. At the same time, a plurality of positioning holes are opened on the side of the adjusting rod along its length direction, and the positioning pins are inserted into the positioning holes.

[0031] Through the above technical solution, when the positioning pin moves backward, it can be retracted into the sleeve, and when the positioning pin moves forward, the front end of the positioning pin is inserted into the positioning hole, so that when the valve wrench is turned, the adjusting rod can be driven to rotate.

[0032] As a further improvement of the above solution, a positioning slide groove is provided on the valve wrench, a positioning slide button is slidably connected in the positioning slide groove, and one end of the positioning slide button is fixed to the side of the positioning pin.

[0033] Through the above technical solution, the positioning latch is moved forward by pushing the positioning slide button, and the positioning latch is moved backward by pulling the positioning slide button.

[0034] As a further improvement of the above solution, rubber rings are fixed at both ends of the inner side of the regulating pipe near the conveying pipe. The two rubber rings cannot be simultaneously attached to the side of the upper cushion block or the lower cushion block. When one of the rubber rings is attached to the side of the upper cushion block or the lower cushion block, the other rubber ring is attached to the side of the central cushion block.

[0035] Through the above technical solution, the rubber rings are used to increase the sealing performance between the cushion block and the inner wall of the regulating pipe, so as to avoid liquid infiltration into the regulating pipe when any ball core is aligned with the inside of the conveying pipe.

[0036] When the first ball core is located inside the conveying pipe, the lower rubber ring is attached to the side of the lower cushion block, and the upper rubber ring is attached to the side of the central cushion block. When the second ball core is located inside the conveying pipe, the lower rubber ring is attached to the side of the central cushion block, and the upper rubber ring is attached to the side of the upper cushion block.

[0037] Compared with the prior art, the present invention provides a ball valve structure with a double ball core, having the following beneficial effects:

[0038] 1. The ball valve structure with a double ball core adopts a double ball core design. By pushing the adjusting rod, the ball core assembly moves downward inside the regulating pipe. The first ball core replaces the position of the second ball core and is fixed in the corresponding positioning hole by inserting a positioning pin, so as to continuously maintain the flow operation of the conveying pipe by the first ball core. And the second ball core enters the deep part of the regulating pipe. After removing the lower cap, the second ball core is removed from the connecting rod for replacement, and after being reinstalled inside, the adjusting rod is pulled upward, so that the replaced second ball core returns to the initial position to complete the subsequent flow circulation and blocking operations. Therefore, the ball core replacement operation can be completed without stopping the flow supply, effectively saving the maintenance time, improving the production efficiency, and reducing the economic loss.

[0039] 2. The ball valve structure with a double ball core is provided with an annular groove on the side of the central cushion block, and a high-density sponge sheet is installed in the annular groove. The high-density sponge sheet absorbs lubricant. Thus, when the ball core assembly moves up and down and the ball core is replaced, the inner wall of the position where the ball core circulates and blocks is smeared with lubricant, thereby reducing the friction resistance of the ball core, reducing the wear of the ball core, and improving the service life of the ball core. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall external structure of the device of the present invention;

[0041] Figure 2 It is a schematic diagram of the overall sectional structure of the device of the present invention;

[0042] Figure 3 It is a schematic diagram of the overall splicing structure of the ball core assembly of the present invention;

[0043] Figure 4 Schematic diagram of the overall disassembly structure of the ball core component of the present invention;

[0044] Figure 5 For the present invention Figure 1 Schematic diagram of the structure at position A in the present invention;

[0045] Figure 6 Schematic diagram of the connection structure between the adjusting part and the first ball core of the present invention;

[0046] Figure 7 Schematic diagram of the connection structure between the valve wrench and the positioning pin of the present invention.

[0047] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0048] 1. Delivery pipe; 101. Input interface; 102. Output interface;

[0049] 2. Regulation pipe; 201. Lower cap; 202. Upper cap; 203. Limit sliding groove; 204. Rubber ring;

[0050] 3. Ball core component; 301. Central cushion block; 3011. Annular groove; 3012. High-density sponge sheet; 3013. Circular hole; 302. Connecting rod; 303. First ball core; 3031. Flow-through groove; 304. Second ball core; 3041. Connecting hole; 305. Upper cushion block; 306. Lower cushion block; 307. Tension spring; 308. Limit slider;

[0051] 4. Adjusting part; 401. Adjusting rod; 402. Restricting button; 403. Positioning hole;

[0052] 5. Regulation part; 501. Connecting ring; 502. Convex button; 503. Valve wrench; 504. Connecting head; 505. Sleeve; 506. Positioning pin; 507. Positioning sliding groove; 508. Positioning sliding button. Detailed implementation manners

[0053] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0054] Embodiment 1

[0055] Please refer to Figures 1-7As shown in the figure, a ball valve structure with a double ball core proposed in this embodiment includes a conveying pipe 1, a regulating pipe 2, a ball core assembly 3, an adjusting member 4, and a regulating member 5. The conveying pipe 1 and the regulating pipe 2 are arranged vertically and crosswise in a cross shape, and the inside of the conveying pipe 1 and the regulating pipe 2 communicate with each other. The position where the conveying pipe 1 and the regulating pipe 2 intersect communicates with each other, so that when the ball core assembly 3 moves in the regulating pipe 2, different ball cores can be used to dock with the conveying pipe 1 to realize the circulation and blocking operations of the liquid.

[0056] An input interface 101 is provided at one end of the conveying pipe 1, and an output interface 102 is provided at the other end of the conveying pipe 1. The liquid is input into the conveying pipe 1 through the input interface 101, and then the liquid is output outward through the output interface 102 into the connected pipeline.

[0057] A lower cap 201 is threadedly connected to the bottom of the regulating pipe 2, and an upper cap 202 is threadedly connected to the top of the regulating pipe 2. At the same time, a ball core assembly 3 is movably connected inside the regulating pipe 2. The lower cap 201 is used to seal the interface at the bottom of the regulating pipe 2, and the upper cap 202 is used to seal the interface at the top of the regulating pipe 2, so that when the ball core assembly 3 moves up and down inside the regulating pipe 2, it is prevented from the ball core assembly 3 disengaging from the interface of the regulating pipe 2.

[0058] The ball core assembly 3 is composed of a first ball core 303 and a second ball core 304. A flow groove 3031 penetrates through the sides of the first ball core 303 and the second ball core 304. A central spacer 301 is movably connected between the first ball core 303 and the second ball core 304. The top and bottom of the central spacer 301 are circularly concave and fit against the sides of the first ball core 303 and the second ball core 304. A circular hole 3013 penetrates through the center position of the central spacer 301, and a connecting rod 302 is rotatably connected inside the circular hole 3013. Connecting holes 3041 are provided on the opposite surfaces of the first ball core 303 and the second ball core 304. The two ends of the connecting rod 302 are respectively threadedly connected into the corresponding connecting holes 3041. The first ball core 303 is a spare ball core, and the second ball core 304 is the main ball core. When the second ball core 304 is replaced, the first ball core 303 is used to replace the position of the second ball core 304 for the circulation and blocking operations of the liquid.

[0059] The first ball core 303 and the second ball core 304 are connected by the connecting rod 302. When the first ball core 303 rotates, it can drive the second ball core 304 to rotate simultaneously. Thus, whether the first ball core 303 is aligned with the inside of the conveying pipe 1 or the second ball core 304 is aligned with the inside of the conveying pipe 1, the circulation and blocking operations of the liquid in the conveying pipe 1 can be realized by rotation.

[0060] The diameters of the first ball core 303 and the second ball core 304 are the same, and the positions of the flow-through grooves 3031 penetrating the sides are aligned. Moreover, the diameter inside the flow-through groove 3031 is the same as the diameter inside the conveying pipe 1. When the flow-through groove 3031 is aligned with the conveying pipe 1 in the vertical direction, liquid circulation is achieved. When the first ball core 303 and the second ball core 304 are rotated so that the flow-through groove 3031 is perpendicular to the conveying pipe 1, the liquid is blocked.

[0061] The ball core assembly 3 further includes an upper cushion block 305 and a lower cushion block 306 movably sleeved inside the regulating pipe 2. The opposite surfaces of the upper cushion block 305 and the lower cushion block 306 are circularly concave, and respectively fit against the sides of the first ball core 303 and the second ball core 304. The bottom of the upper cushion block 305 fits on the first ball core 303, and the top of the lower cushion block 306 fits on the bottom of the second ball core 304. The first ball core 303 and the second ball core 304 can be stably fitted in the concave surfaces of the central cushion block 301, the upper cushion block 305 and the lower cushion block 306, improving the stability of the rotation and movement of the first ball core 303 and the second ball core 304.

[0062] An adjusting member 4 for adjusting the height of the ball core assembly 3 is installed on the first ball core 303. The adjusting member 4 includes an adjusting rod 401 fixed on the first ball core 303. The adjusting rod 401 is movably sleeved at the central position of the upper cap 202. When the adjusting rod 401 is pulled upward to the limit, the second ball core 304 is located inside the conveying pipe 1. When the adjusting rod 401 is pushed downward to the limit, the first ball core 303 is located inside the conveying pipe 1.

[0063] A regulating member 5 for controlling the adjusting rod 401 to drive the first ball core 303 and the second ball core 304 to rotate, realizing the functions of fluid circulation and cut-off, is movably connected to the upper cap 202.

[0064] The working principle of the ball valve structure with a double ball core proposed in this embodiment is as follows: During use, by pushing the adjusting rod 401 downward, the first ball core 303 is located inside the conveying pipe 1, and the positioning slide button 508 is pushed, so that the positioning pin 506 is inserted into the corresponding positioning hole 403 on the side of the adjusting rod 401. At this time, by rotating the valve wrench 503, the first ball core 303 and the second ball core 304 are rotated simultaneously, so that the flow-through groove 3031 communicates with both ends of the conveying pipe 1, so that the liquid is input from the input interface 101 into the conveying pipe 1 and then output from the output interface 102.

[0065] When replacing the ball core, by rotating the valve wrench 503, the ball core rotates. At this time, the flow groove 3031 of the first ball core 303 is not communicated with the conveying pipe 1. Then, by pulling the positioning slider 508, the positioning pin 506 is disengaged from the positioning hole 403. At this time, the adjusting rod 401 is pulled upward, and under the push of the tension spring 307, the second ball core 304 is placed inside the conveying pipe 1. Then, the positioning slider 508 is pushed, so that the positioning pin 506 is inserted into the corresponding positioning hole 403. Then, the valve wrench 503 is rotated, so that the first ball core 303 and the second ball core 304 rotate. At this time, the flow groove 3031 of the second ball core 304 is communicated with the inside of the conveying pipe 1, realizing the liquid circulation operation.

[0066] Further, limiting chutes 203 are provided at both ends inside the regulating pipe 2. At the same time, limiting sliders 308 are provided on the sides of the upper cushion block 305 and the lower cushion block 306, and the limiting sliders 308 are slidably connected inside the limiting chutes 203.

[0067] More specifically, when the upper cushion block 305 and the lower cushion block 306 move up and down inside the regulating pipe 2, the limiting sliders 308 slide inside the limiting chutes 203, improving the stability of the overall up and down movement of the ball core assembly 3. At the same time, the central cushion block 301, the upper cushion block 305 and the lower cushion block 306 are restricted from rotating.

[0068] Further, a tension spring 307 is installed between the bottom of the lower cushion block 306 and the lower cap 201.

[0069] More specifically, the tension spring 307 is used to push the lower cushion block 306 upward, so that the second ball core 304 returns to the initial position where the second ball core 304 is aligned with the inside of the conveying pipe 1.

[0070] Embodiment 2

[0071] Please refer to Figures 3-7 As shown, for the ball valve structure with a double ball core proposed in this embodiment, on the basis of Embodiment 1, this embodiment further includes that an annular groove 3011 is provided on the side of the central cushion block 301, and a high-density sponge sheet 3012 is fixed in the annular groove 3011, and the high-density sponge sheet 3012 is attached to the inner side of the regulating pipe 2.

[0072] More specifically, the high-density sponge sheet 3012 absorbs lubricant. When the first ball core 303 and the second ball core 304 are switched, the high-density sponge sheet 3012 coats the inner wall of the position where the ball core is communicated with the conveying pipe 1 with lubricant, thereby reducing the frictional resistance between the ball core and the inner wall of the pipe and improving the operation smoothness of the upper adjusting member 4 and the regulating member 5.

[0073] Further, a limiting button 402 is fixed on the adjusting rod 401, and the limiting button 402 can be attached to the upper cap 202 at a set height.

[0074] More specifically, by pushing the limiting button 402 downward, the limiting button 402 fits on the upper cover cap 202 , so that the first ball core 303 is aligned with the inside of the delivery tube 1 .

[0075] Furthermore, the adjustment control 5 includes a connecting ring 501 rotatably connected to the upper cover cap 202 , and the adjusting rod 401 is movably sleeved in the connecting ring 501 .

[0076] More specifically, the diameter of the adjusting rod 401 matches the diameter inside the connecting ring 501 , thereby improving the stability of the rotation of the adjusting rod 401 .

[0077] Furthermore, a convex button 502 is provided on the side of the connecting ring 501 , and a valve wrench 503 is movably connected to the side of the connecting ring 501 . Connecting heads 504 are oppositely provided on both sides of one end of the valve wrench 503 , and the connecting head 504 is fixed on the convex button 502 .

[0078] More specifically, by rotating the valve wrench 503, the connecting ring 501 rotates, and when the positioning pin 506 is inserted into the positioning hole 403, the connecting ring 501 can drive the adjusting rod 401 to rotate, so that the first ball core 303 and the second ball core 304 rotate.

[0079] Furthermore, a sleeve 505 is fixed to the bottom of the valve wrench 503, and a positioning pin 506 is movably sleeved in the sleeve 505. At the same time, a plurality of positioning holes 403 are opened on the side of the adjustment rod 401 along its length direction, and the positioning pin 506 is inserted into the positioning hole 403.

[0080] More specifically, when the positioning pin 506 moves backward, it can be retracted into the sleeve 505, and when the positioning pin 506 moves forward, the front end of the positioning pin 506 is inserted into the positioning hole 403, so that when the valve wrench 503 is turned, the adjustment rod 401 can be driven to rotate.

[0081] Furthermore, a positioning slot 507 is provided on the valve wrench 503 , and a positioning slide button 508 is slidably connected in the positioning slot 507 , and one end of the positioning slide button 508 is fixed to the side of the positioning latch 506 .

[0082] More specifically, by pushing the positioning slide button 508, the positioning latch 506 moves forward, and by pulling the positioning slide button 508, the positioning latch 506 moves backward.

[0083] Further, rubber rings 204 are fixedly arranged at both ends of the inner side of the control pipe 2 close to the conveying pipe 1. The two rubber rings 204 cannot simultaneously fit on the sides of the upper cushion block 305 or the lower cushion block 306. When one of the rubber rings 204 fits on the side of the upper cushion block 305 or the lower cushion block 306, the other rubber ring 204 fits on the side of the central cushion block 301.

[0084] More specifically, the rubber rings 204 are used to increase the sealing performance between the cushion block and the inner wall of the control pipe 2, so as to avoid liquid from seeping into the control pipe 2 when any ball core is aligned with the inside of the conveying pipe 1.

[0085] When the first ball core 303 is located inside the conveying pipe 1, the lower rubber ring 204 fits on the side of the lower cushion block 306, and the upper rubber ring 204 fits on the side of the central cushion block 301. When the second ball core 304 is located inside the conveying pipe 1, the lower rubber ring 204 fits on the side of the central cushion block 301, and the upper rubber ring 204 fits on the side of the upper cushion block 305.

[0086] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-ball-core ball valve structure, comprising a delivery pipe (1), a regulating pipe (2), a ball-core assembly (3), a regulating member (4) and a regulating control member (5), characterized in that: The delivery pipe (1) and the regulating pipe (2) are arranged vertically and cross-shaped, and the delivery pipe (1) and the regulating pipe (2) are interconnected; One end of the delivery pipe (1) is provided with an input interface (101), while the other end of the delivery pipe (1) is provided with an output interface (102); The bottom of the regulating tube (2) is threadedly connected to a lower cover cap (201), while the top of the regulating tube (2) is threadedly connected to an upper cover cap (202), and a ball core assembly (3) is movably connected inside the regulating tube (2); Both ends of the control tube (2) are provided with limit slide grooves (203), and the sides of the upper cushion block (305) and the lower cushion block (306) are provided with limit slide blocks (308), and the limit slide blocks (308) are slidably connected in the limit slide grooves (203); A tension spring (307) is installed between the bottom of the lower pad (306) and the lower cover cap (201); The core assembly (3) is composed of a first core (303) and a second core (304); the sides of the first core (303) and the second core (304) are penetrated by a flow groove (3031); a central pad (301) is movably connected between the first core (303) and the second core (304); the top and bottom of the central pad (301) are circular and concave, and fit on the sides of the first core (303) and the second core (304); a circular hole (3013) is penetrated at the center of the central pad (301); a connecting rod (302) is rotatably connected in the circular hole (3013); connecting holes (3041) are opened on the opposite surfaces of the first core (303) and the second core (304); and both ends of the connecting rod (302) are respectively threadedly connected in the corresponding connecting holes (3041); The core assembly (3) further comprises an upper pad (305) and a lower pad (306) movably sleeved in the regulating tube (2); the opposing surfaces of the upper pad (305) and the lower pad (306) are circular and concave, and respectively fit the side portions of the first core (303) and the second core (304); the bottom of the upper pad (305) fits on the first core (303), and the top of the lower pad (306) fits on the bottom of the second core (304); An adjusting member (4) for adjusting the height of the core assembly (3) is mounted on the first core (303), the adjusting member (4) comprising an adjusting rod (401) fixed on the first core (303), the adjusting rod (401) being movably sleeved at the center of the upper cover cap (202); The upper cover cap (202) is movably connected with an adjustment control unit (5) for controlling the adjustment rod (401) to drive the first ball core (303) and the second ball core (304) to rotate, thereby achieving the functions of fluid circulation and flow interruption.

2. A double-ball ball valve structure according to claim 1, characterized in that: An annular groove (3011) is provided on the side of the central cushion block (301), a high-density sponge sheet (3012) is fixed in the annular groove (3011), and the high-density sponge sheet (3012) is fitted on the inner side of the control tube (2).

3. A double-ball ball valve structure according to claim 1, characterized in that: A limiting button (402) is fixed on the adjusting rod (401), and the limiting button (402) can fit on the upper cover cap (202) at a set height.

4. A double-ball ball valve structure according to claim 1, characterized in that: The adjustment control unit (5) comprises a connecting ring (501) rotatably connected to the upper cover cap (202), and the adjustment rod (401) is movably sleeved in the connecting ring (501).

5. A double-ball ball valve structure according to claim 4, characterized in that: The side of the connecting ring (501) is provided with a convex button (502), and the side of the connecting ring (501) is movably connected to a valve wrench (503). Connecting heads (504) are oppositely arranged on both sides of one end of the valve wrench (503), and the connecting head (504) is fixed on the convex button (502).

6. A double-ball ball valve structure according to claim 5, characterized in that: A sleeve (505) is fixed at the bottom of the valve wrench (503), and a positioning pin (506) is movably sleeved in the sleeve (505). At the same time, a plurality of positioning holes (403) are opened on the side of the adjustment rod (401) along its length direction, and the positioning pin (506) is inserted into the positioning hole (403).

7. A double-ball ball valve structure according to claim 6, characterized in that: The valve wrench (503) is provided with a positioning slide groove (507), and a positioning slide button (508) is slidably connected in the positioning slide groove (507), and one end of the positioning slide button (508) is fixed to the side of the positioning latch (506).

8. A double-ball ball valve structure according to claim 2, characterized in that: Rubber rings (204) are fixed to the inner side of the control tube (2) near both ends of the delivery tube (1), and the two rubber rings (204) cannot be attached to the side of the upper pad (305) or the lower pad (306) at the same time. When one of the rubber rings (204) is attached to the side of the upper pad (305) or the lower pad (306), the other rubber ring (204) is attached to the side of the central pad (301).

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