A valve with a primary and secondary ball

Abstract

This invention relates to the technical field of valves, and in particular to a master ball valve, which improves the sealing performance, high temperature and high pressure resistance, and reduces flow resistance by using a ball valve core and triple locking; it includes an active valve and a passive valve, which cooperate with each other to seal and transport or stop the transport of materials; the passive valve is installed on the active valve.

Description

Technical Field

[0001] This invention relates to the technical field of valves, and in particular to a mother-daughter ball valve. Background Technology

[0002] Traditional master-slave valves (also known as AB valves, αβ valves, or AB butterfly valves) are generally butterfly valves. The valve core opening and closing element adopts a disc structure. The fluid passage is opened, closed, and regulated by the reciprocating rotation of the disc opening and closing element by about 90°. Due to the limitations of the disc opening and closing element structure and sealing materials, traditional master-slave valves have the following technical problems:

[0003] 1. For sealing purposes, traditional butterfly valves typically have a flexible sleeve installed at the valve core (valve plate). Traditional butterfly valves are not suitable for use in high-temperature and high-pressure pipeline systems.

[0004] 2. Traditional master valves also have relatively poor sealing performance, so they can only be used in situations where the sealing requirements are not very high. They are not suitable for the isolation and closed conveying of radioactive powders (such as highly radioactive powders used in the preparation of nuclear power core rods), highly toxic raw material powders, and highly active raw material powders in industries such as pharmaceuticals, chemicals, and nuclear industries.

[0005] 3. When a traditional master valve is opened, the valve core is still in the flow channel when the opening and closing part (valve core) is rotated to 90°, which will occupy a large flow channel space and generate a large flow resistance.

[0006] Therefore, the existing master and slave valves need to be improved. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention provides a master ball valve that improves the sealing performance, high temperature and high pressure resistance, and reduces flow resistance by using a ball valve core and triple locking.

[0008] The present invention provides a master ball valve, comprising a master valve and a slave valve, wherein the master valve and the slave valve cooperate with each other to seal and convey or stop conveying materials;

[0009] The driven valve is mounted on the active valve;

[0010] The driven valve is hung on the active valve, and then locked three times to fix the driven valve to the active valve. After that, the driven valve and the active valve are opened to transport materials, thereby improving the sealing effect and practicality of the master ball valve.

[0011] Preferably, the active valve includes an active valve seat, an active valve locking nut, a hook shaft, a hook plate, an active valve stem one, an active valve cover one, an active valve sealing ring, an active valve stem two, an active valve cover two, and an active valve core. The active valve locking nut is installed at the bottom end of the active valve seat, the hook shaft is installed at the top left of the active valve seat, the hook plate is rotatably installed at the right side of the active valve seat, and the active valve core is rotatably installed inside the active valve seat, with a spherical notch on it. One end of the active valve stem one and the active valve stem two are fixedly connected to the left and right ends of the active valve core, respectively. The other ends of the active valve stem one and the active valve stem two are respectively connected to the active valve seat. The valve extends from the right and left ends, and both the first and second active valve stems are rotatably connected to the active valve seat. The active valve sealing ring is fitted onto the first active valve stem to seal the gap between the first active valve stem and the active valve seat. The first active valve cover is fixedly installed on the right end of the first active valve stem and is located on the right side of the hook plate. The first active valve cover has a notch. The second active valve cover is fixedly installed on the left side of the second active valve stem. The driven valve is fixed by the hook shaft and limited by the hook plate. By rotating the first active valve cover, the active valve core is rotated, opening or closing the active valve, thereby improving the practicality of the master ball valve.

[0012] Preferably, the driven valve includes a driven valve seat, a driven valve locking nut, a driven valve stem one, a driven valve cover one, a driven valve sealing ring, a driven valve stem two, a driven valve stem three, and a driven valve core. The driven valve seat has a hook step at its bottom end and a hook on the left side of its bottom end. The driven valve locking nut is installed on the top of the driven valve seat. The driven valve core is rotatably installed inside the driven valve seat. One end of the driven valve stem one and the driven valve stem two are fixedly connected to the left and right ends of the driven valve core, respectively. The other end extends from the right and left ends of the driven valve seat, respectively. Both driven valve stem one and driven valve stem two are rotatably connected to the driven valve seat. A limit protrusion is provided on the right side of driven valve stem one. The driven valve sealing ring is fitted onto driven valve stem one to seal the gap between driven valve stem one and driven valve seat. Driven valve cover one is rotatably installed on the right end of driven valve stem one, and driven valve cover one is located to the right of the limit protrusion. Driven valve cover one is provided with an arc-shaped opening and a second notch. Driven valve stem two is fixedly installed on the left side of driven valve stem two; by hanging... The hook hangs the driven valve seat on the hook shaft. Then, the driven valve seat is rotated around the hook shaft until its bottom contactes the top of the driving valve seat. Simultaneously, the driven valve cores nest together through the spherical notch on the driving valve core. The hook plate then engages with the hook step on the driven valve seat, achieving initial docking and completing the first locking. Afterward, because the driven valve core is nested within the spherical notch of the driving valve core, only rotating the driven valve stem can move the driven valve core. The driven valve core restricts the driving valve core; this is the second locking. By rotating the driven valve stem, the driven valve core rotates. After the driven valve cover rotates to its position, the driven valve core rotates to the open state, aligning the arc-shaped opening on the driven valve cover with the notch on the active valve cover. Only then can the active valve cover and the active valve core begin to rotate. After the active valve core is fully open, it connects with the internal channel of the driven valve core. The active valve cover limits the driven valve cover, and simultaneously, the driven valve cover and the active valve cover limit the latch plate, completing the third locking. This improves the practicality of the master ball valve.

[0013] Preferably, a sealing ring is provided at the bottom end of the driven valve seat.

[0014] Preferably, the active valve seat and the driven valve seat each have two valve core sealing rings inside; the valve core sealing rings inside the active valve seat and the driven valve seat respectively seal the joint between the active valve core and the active valve seat, and the joint between the driven valve seat and the driven valve core, and the sealing ring at the bottom of the driven valve seat seals the mating point between the active valve seat and the driven valve seat, thereby improving the sealing effect of the ball valve.

[0015] Preferably, it also includes two sets of limiting mechanisms, which are respectively installed in the active valve seat and the driven valve seat, and both the active valve stem and the driven valve stem are provided with limiting holes;

[0016] The limiting mechanism includes a spring guide pin, a first spring, a limiting key, and a second spring. The limiting key has a cone-shaped part. The spring guide pin and the limiting key on the active valve seat are slidably mounted to the active valve seat, and the spring guide pin and the limiting key on the driven valve seat are also slidably mounted to the driven valve seat. The first spring is fitted onto the spring guide pin, and the second spring is fitted onto the limiting key. After the active and driven valve seats are closed, one end of the spring guide pin on the active valve seat presses against the bottom end of the driven valve seat, causing the spring guide pin on the active valve seat to retract into the active valve seat. Simultaneously, the other end of the spring guide pin on the active valve seat presses against the cone-shaped part of the limiting key on the active valve seat. This process involves extending one end of the limit key on the active valve seat through the limit hole of the second active valve stem, while simultaneously pressing one end of the spring guide pin on the driven valve seat against the top of the active valve seat. Repeating this process releases the limit on both the active and driven valve cores. After material transport, the second active and driven valve stems reset, and the active and driven valve seats are then separated. The first spring and the limit key reset the spring guide pin and the limit key, continuing to limit the movement of the active and driven valve cores, thus improving the practicality of the master ball valve.

[0017] Preferably, the right end of the hook plate is provided with a hook plate protrusion, and the left end of the hook plate is provided with two sets of hook plate locking blocks. A reserved spring is provided at the connection between the hook plate and the active valve seat. After the active valve and the driven valve are closed, the hook plate is limited by the reserved spring, which facilitates the two sets of hook plate locking blocks to limit the driven valve seat. After the active valve and the driven valve are separated, the hook plate protrusion on the hook plate is locked in the first recess to limit the valve cover of the active valve, thereby improving the practicality of the master ball valve.

[0018] Preferably, a limiting step is provided on the back of the driven valve cover; when the driven valve cover is rotated, the limiting step and the limiting protrusion of the driven valve cover limit the rotation direction of the driven valve cover.

[0019] Preferred methods of use include:

[0020] Step 1: Seal the joints between the active valve core and the active valve seat, and between the driven valve seat and the driven valve core using the valve core sealing rings inside the active valve seat and the driven valve seat, respectively. Hang the driven valve seat on the hook shaft using a hook. Then, rotate the driven valve seat around the hook shaft until the bottom of the driven valve seat contacts the top of the active valve seat. Simultaneously, the driven valve cores interlock through the spherical notches on the active valve core. Then, through the action of a pre-installed spring, the hook plate hooks onto the hook step on the driven valve seat, achieving initial docking between the active and driven valves and completing the first locking. During the initial docking, notch one aligns with notch two, and the driven valve seat... The sealing ring at the bottom seals the mating point between the active valve seat and the driven valve seat. After the active and driven valve seats are closed, one end of the spring guide pin on the active valve seat presses against the bottom of the driven valve seat, causing the spring guide pin on the active valve seat to retract into the active valve seat. At the same time, the other end of the spring guide pin on the active valve seat presses against the cone of the limit key on the active valve seat, causing one end of the limit key on the active valve seat to extend out of the limit hole of the second active valve stem. Meanwhile, one end of the spring guide pin on the driven valve seat presses against the top of the active valve seat. The above steps are repeated, causing one end of the limit key on the driven valve seat to extend out of the limit hole of the second driven valve stem, thus releasing the limit on the active valve core and the driven valve core.

[0021] Step 2: Since the spherical outer surface of the driven valve core is nested in the spherical notch of the active valve core, the driven valve stem must be rotated first to drive the driven valve core. The driven valve core restricts the active valve core, which is the second locking step. By rotating the driven valve stem, the driven valve core is rotated. After the driven valve cover rotates to its position, the driven valve core rotates to the open position, aligning the arc-shaped opening on the driven valve cover with the notch on the active valve cover. Only then can the active valve cover and the active valve core begin to rotate. After the active valve core is fully open, it connects with the internal channel of the driven valve core. The active valve cover limits the driven valve cover, and both the driven valve cover and the active valve cover limit the latch plate, completing the third locking step.

[0022] Step 3: After material conveying, reverse the above steps to separate the active valve from the passive valve.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. By using a ball valve core, the sealing effect of the main valve is improved, the flow resistance inside the main valve is reduced, and the corrosion resistance of the main valve is improved.

[0025] 2. By locking three times, the sealing effect of the valve is further improved, and the valve is convenient to use in high temperature and high pressure environments;

[0026] 3. Both the active and passive valves have simple structures and are easy to maintain. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the closed state structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the isometric structure of the present invention;

[0030] Figure 4 This is an axonometric enlarged structural diagram of the active valve of the present invention;

[0031] Figure 5 This is a partial cross-sectional structural diagram of the active valve of the present invention;

[0032] Figure 6 This is an axonometric enlarged structural schematic diagram of the spring guide pin of the present invention;

[0033] Figure 7 This is an axonometric enlarged structural diagram of the driven valve of the present invention;

[0034] Figure 8 This is an enlarged structural schematic diagram of the driven valve seat and limiting protrusion of the present invention;

[0035] Figure 9 This is a left-view enlarged structural schematic diagram of the driven valve cover of the present invention;

[0036] Figure 10 This is a schematic diagram of the cross-sectional structure of the present invention;

[0037] Figure 11 This is a schematic diagram of the state structure when the present invention is conveying materials;

[0038] The attached diagram shows the following markings: 1-1, Active valve seat; 1-2, Active valve lock nut; 1-3, Hook shaft; 2, Hook plate; 2-1, Hook plate protrusion; 2-3, Hook plate latch; 3, Active valve stem one; 3-2, Active valve cover one; 3-3, Active valve sealing ring; 3-4, Active valve stem two; 3-5, Active valve cover two; 4, Active valve core; 5-1, Driven valve seat; 5-2, Driven valve lock nut. 5-3, Sealing ring; 5-4, Limiting protrusion; 5-5, Hook step; 5-6, Hook; 6, Driven valve stem one; 6-2, Driven valve cover one; 6-3, Driven valve sealing ring; 6-4, Driven valve stem two; 6-5, Driven valve stem two; 7, Driven valve core; 8, Core sealing ring; 10, Reserved spring; 11, Spring guide pin; 12, First spring; 13, Limiting key; 14, Second spring. Detailed Implementation

[0039] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0040] Example

[0041] like Figure 1 , Figure 10 and Figure 11 As shown, it includes an active valve and a passive valve, which cooperate to seal and transport materials or stop the transport; the passive valve is installed on the active valve;

[0042] like Figure 1 , Figure 4 , Figure 5 , Figure 7 , Figure 10 and Figure 11 As shown, the active valve includes an active valve seat 1-1, an active valve locking nut 1-2, a hook shaft 1-3, a hook plate 2, an active valve stem 1-3, an active valve cover 1-2, an active valve sealing ring 3-3, an active valve stem 2-4, an active valve cover 2-5, and an active valve core 4. The active valve locking nut 1-2 is installed at the bottom of the active valve seat 1-1, the hook shaft 1-3 is installed at the top left of the active valve seat 1-1, the hook plate 2 is rotatably installed at the right side of the active valve seat 1-1, and the active valve core 4 is rotatably installed inside the active valve seat 1-1. The active valve core 4 has a spherical notch. One end of the active valve stem 1-3 and the active valve stem 2-4 are respectively connected to the main valve seat 1-1. The left and right ends of the valve core 4 of the active valve are fixedly connected. The other ends of the first valve stem 3 and the second valve stem 3-4 of the active valve extend from the right and left ends of the active valve seat 1-1, respectively. The first valve stem 3 and the second valve stem 3-4 of the active valve are rotatably connected to the active valve seat 1-1. The active valve sealing ring 3-3 is fitted on the first valve stem 3 of the active valve to seal the gap between the first valve stem 3 of the active valve and the active valve seat 1-1. The first valve cover 3-2 of the active valve is fixedly installed on the right end of the first valve stem 3 of the active valve, and the first valve cover 3-2 of the active valve is located on the right side of the hook plate 2. The first valve cover 3-2 of the active valve is provided with a notch. The second valve cover 3-5 of the active valve is fixedly installed on the left side of the second valve stem 3-4 of the active valve.

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11The driven valve includes a driven valve seat 5-1, a driven valve locking nut 5-2, a driven valve stem 6-1, a driven valve cover 6-2, a driven valve sealing ring 6-3, a driven valve stem 6-4, a driven valve stem 6-5, and a driven valve core 7. A hook step 5-5 is provided at the bottom end of the driven valve seat 5-1, and a hook 5-6 is provided on the left side of the bottom end of the driven valve seat 5-1. The driven valve locking nut 5-2 is installed at the top end of the driven valve seat 5-1. The driven valve core 7 is rotatably installed inside the driven valve seat 5-1. One end of the driven valve stem 6-1 and the driven valve stem 6-4 are respectively fixedly connected to the left and right ends of the driven valve core 7. The other ends of the driven valve stem 6-1 and the driven valve stem 6-4 are respectively... Extending from the right and left ends of the driven valve seat 5-1, both the driven valve stem 6-1 and the driven valve stem 6-4 are rotatably connected to the driven valve seat 5-1. A limiting protrusion 5-4 is provided on the right side of the driven valve stem 6-1. The driven valve sealing ring 6-3 is fitted onto the driven valve stem 6-1 to seal the gap between the driven valve stem 6-1 and the driven valve seat 5-1. The driven valve cover 6-2 is rotatably installed on the right end of the driven valve stem 6-1 and is located to the right of the limiting protrusion 5-4. The driven valve cover 6-2 is provided with an arc-shaped opening and a second notch. A limiting step is provided on the back of the driven valve cover 6-2. The driven valve stem 6-5 is fixedly installed on the left side of the driven valve stem 6-4.

[0044] like Figure 10 and Figure 11 As shown, the active valve seat 1-1 and the driven valve seat 5-1 are each provided with two valve core sealing rings 8 inside, and the driven valve seat 5-1 is provided with a sealing ring 5-3 at the bottom end;

[0045] like Figure 1 , Figure 5 and Figure 6 As shown, it also includes two sets of limiting mechanisms, which are respectively installed in the active valve seat 1-1 and the driven valve seat 5-1. Limiting holes are provided on both the active valve stem 3-4 and the driven valve stem 6-4. The limiting mechanism includes a spring guide pin 11, a first spring 12, a limiting key 13 and a second spring 14. A cone is provided on the limiting key 13. The spring guide pin 11 and the limiting key 13 on the active valve seat 1-1 are slidably installed with the active valve seat 1-1. The spring guide pin 11 and the limiting key 13 on the driven valve seat 5-1 are slidably installed with the driven valve seat 5-1. The first spring 12 is fitted on the spring guide pin 11 and the second spring 14 is fitted on the limiting key 13.

[0046] like Figure 1 As shown, the right end of the hook plate 2 is provided with a hook plate protrusion 2-1, the left end of the hook plate 2 is provided with two sets of hook plate clips 2-3, and a reserved spring 10 is provided at the connection between the hook plate 2 and the active valve seat 1-1.

[0047] First, the valve core sealing rings 8 inside the active valve seat 1-1 and the driven valve seat 5-1 respectively seal the joint between the active valve core 4 and the active valve seat 1-1, and the joint between the driven valve seat 5-1 and the driven valve core 7. Then, the driven valve seat 5-1 is hung on the hook shaft 1-3 by the hook 5-6. Then, the driven valve seat 5-1 is rotated around the hook shaft 1-3, so that the bottom end of the driven valve seat 5-1 contacts the top end of the active valve seat 1-1. At the same time, the driven valve cores 7 are nested together through the spherical notches on the active valve core 4. Then, the hook plate 2 is used to hook the hook step 5-5 on the driven valve seat 5-1, so that the active valve and the driven valve are initially connected, completing the first connection. When locked, during the initial docking of the active valve and the driven valve, notch one and notch two align, and the sealing ring 5-3 at the bottom of the driven valve seat 5-1 seals the docking point between the active valve seat 1-1 and the driven valve seat 5-1. Simultaneously, after the active valve seat 1-1 and the driven valve seat 5-1 are closed, one end of the spring guide pin 11 on the active valve seat 1-1 presses against the bottom of the driven valve seat 5-1, causing the spring guide pin 11 on the active valve seat 1-1 to retract into the active valve seat 1-1. At the same time, the other end of the spring guide pin 11 on the active valve seat 1-1 presses against the cone of the limit key 13 on the active valve seat 1-1, causing one end of the limit key 13 on the active valve seat 1-1 to be propelled by the active valve stem 2 3-4. The spring guide pin 11 on the driven valve seat 5-1 extends out of the limiting hole, and at the same time, one end of the spring guide pin 11 on the driven valve seat 5-1 presses against the top of the driving valve seat 1-1. The above steps are repeated so that one end of the limiting key 13 on the driven valve seat 5-1 extends out of the limiting hole of the driven valve stem 6-4, releasing the limiting of the driving valve core 4 and the driven valve core 7. Then, since the driven valve core 7 is nested in the spherical notch of the driving valve core 4, rotating the driven valve stem drives the driven valve core 7, and the driven valve core 7 restricts the driving valve core 4. This is the second locking. The limiting step of the driven valve cover 6-2 and the limiting protrusion 5-4 limit the rotation direction of the driven valve cover 6-2. By rotating the driven valve... Valve stem 6 drives the driven valve core 7 to rotate. After the driven valve cover 6-2 rotates to its position, the driven valve core 7 rotates to the open state, aligning the arc-shaped opening on the driven valve cover 6-2 with the notch on the active valve cover 3-2. Only then can the active valve cover 3-2 and the active valve core 4 begin to rotate. After the active valve core 4 is fully open, it connects with the internal channel of the driven valve core 7. The active valve cover 3-2 limits the driven valve cover 6-2, and simultaneously the driven valve cover 6-2 and the active valve cover 3-2 limit the hook plate 2, completing the third locking. After material conveying, the above steps are repeated in reverse to separate the active valve and the driven valve.

[0048] The present invention discloses a mother-daughter ball valve, the installation method, connection method, or setting method of which are all common mechanical methods. The valve stem and valve cover are connected by a pin structure, which is a mature technology. As long as it can achieve its beneficial effect, it can be implemented. The reserved spring 10 is a torsion spring. The active valve sealing ring 3-3, sealing ring 5-3, driven valve sealing ring 6-3, valve core sealing ring 8, reserved spring 10, first spring 12 and second spring 14 of the mother-daughter ball valve of the present invention are purchased from the market. Those skilled in the industry only need to install and operate it according to the accompanying instruction manual, without requiring creative labor from those skilled in the art.

[0049] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0050] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A mother-daughter ball valve, characterized in that, It includes an active valve and a passive valve, which cooperate to seal or stop the conveying of materials; the passive valve is installed on the active valve; The active valve includes an active valve seat (1-1), an active valve locking nut (1-2), a hook shaft (1-3), a hook plate (2), an active valve stem one (3), an active valve cover one (3-2), an active valve sealing ring (3-3), an active valve stem two (3-4), an active valve cover two (3-5), and an active valve core (4). The active valve locking nut (1-2) is installed at the bottom of the active valve seat (1-1), the hook shaft (1-3) is installed at the top left of the active valve seat (1-1), the hook plate (2) is rotatably installed at the right side of the active valve seat (1-1), and the active valve core (4) is rotatably installed inside the active valve seat (1-1). The active valve core (4) is provided with a spherical notch. One end of the active valve stem one (3) and the active valve stem two (3-4) are respectively connected to... The left and right ends of the active valve core (4) are fixedly connected. The other ends of the active valve stem 1 (3) and the active valve stem 2 (3-4) extend from the right and left ends of the active valve seat (1-1) respectively. The active valve stem 1 (3) and the active valve stem 2 (3-4) are rotatably connected to the active valve seat (1-1). The active valve sealing ring (3-3) is fitted on the active valve stem 1 (3) to seal the gap between the active valve stem 1 (3) and the active valve seat (1-1). The active valve cover 1 (3-2) is fixedly installed on the right end of the active valve stem 1 (3) and is located on the right side of the hook plate (2). The active valve cover 1 (3-2) has a notch 1. The active valve cover 2 (3-5) is fixedly installed on the left side of the active valve stem 2 (3-4). The driven valve includes a driven valve seat (5-1), a driven valve locking nut (5-2), a driven valve stem (6), a driven valve cover (6-2), a driven valve sealing ring (6-3), a driven valve stem (6-4), a driven valve stem (6-5), and a driven valve core (7). A hook step (5-5) is provided at the bottom of the driven valve seat (5-1), and a hook (5-6) is provided on the left side of the bottom of the driven valve seat (5-1). The driven valve locking nut (5-2) is installed at the top of the driven valve seat (5-1). The driven valve core (7) is rotatably installed inside the driven valve seat (5-1). One end of the driven valve stem (6) and the driven valve stem (6-4) are fixedly connected to the left and right ends of the driven valve core (7), respectively. The driven valve stem (6) and the driven valve core (7) are... The other end of valve stem two (6-4) extends from the right and left ends of driven valve seat (5-1), and both driven valve stem one (6) and driven valve stem two (6-4) are rotatably connected to driven valve seat (5-1). A limiting protrusion (5-4) is provided on the right side of driven valve stem one (6). Driven valve sealing ring (6-3) is fitted on driven valve stem one (6) to seal the gap between driven valve stem one (6) and driven valve seat (5-1). Driven valve cover one (6-2) is rotatably installed on the right end of driven valve stem one (6), and driven valve cover one (6-2) is located on the right side of limiting protrusion (5-4). Driven valve cover one (6-2) is provided with an arc-shaped opening and a recess two. Driven valve stem two (6-5) is fixedly installed on the left side of active valve stem two (3-4).

2. The mother-daughter ball valve as described in claim 1, characterized in that, The active valve seat (1-1) and the driven valve seat (5-1) are each provided with two valve core sealing rings (8), and the bottom end of the driven valve seat (5-1) is provided with a sealing ring (5-3).

3. A mother-daughter ball valve as described in claim 1, characterized in that, It also includes two sets of limiting mechanisms, which are respectively installed in the active valve seat (1-1) and the driven valve seat (5-1). Limiting holes are provided on both the active valve stem (3-4) and the driven valve stem (6-4). The limiting mechanism includes a spring guide pin (11), a first spring (12), a limiting key (13), and a second spring (14). The limiting key (13) is provided with a cone. The spring guide pin (11) and the limiting key (13) on the active valve seat (1-1) are slidably installed with the active valve seat (1-1). The spring guide pin (11) and the limiting key (13) on the driven valve seat (5-1) are slidably installed with the driven valve seat (5-1). The first spring (12) is fitted on the spring guide pin (11), and the second spring (14) is fitted on the limiting key (13).

4. A mother-daughter ball valve as described in claim 1, characterized in that, The right end of the hook plate (2) is provided with a hook plate protrusion (2-1), the left end of the hook plate (2) is provided with two sets of hook plate clips (2-3), and a reserved spring (10) is provided at the connection between the hook plate (2) and the active valve seat (1-1).

5. A mother-daughter ball valve as described in claim 1, characterized in that, A limit step is provided on the back of the driven valve cover (6-2).

6. A method of using a master ball valve, employing a master ball valve as described in claim 4, characterized in that, Usage instructions include: Step 1: Seal the joints between the active valve core (4) and the active valve seat (1-1) and between the driven valve seat (5-1) and the driven valve core (7) using the valve core sealing rings (8) inside the active valve seat (1-1) and the driven valve seat (5-1) respectively. Then, hang the driven valve seat (5-1) on the hook shaft (1-3) using the hook (5-6). Then, rotate the driven valve seat (5-1) around the hook shaft (1-3) to make the bottom end of the driven valve seat (5-1) contact the active valve core (7). The top of the valve seat (1-1) contacts, and at the same time, the driven valve core (7) nests with each other through the spherical notch on the active valve core (4). Then, through the action of the reserved spring (10), the hook plate (2) hooks onto the hook step (5-5) on the driven valve seat (5-1), so that the active valve and the driven valve are initially connected and the first locking is completed. When the active valve and the driven valve are initially connected, notch one and notch two are opposite each other, and the sealing ring (5-3) at the bottom of the driven valve seat (5-1) is used to lock the active valve. The mating point between the valve seat (1-1) and the driven valve seat (5-1) is sealed. Simultaneously, after the active valve seat (1-1) and the driven valve seat (5-1) are closed, one end of the spring guide pin (11) on the active valve seat (1-1) presses against the bottom end of the driven valve seat (5-1), causing the spring guide pin (11) on the active valve seat (1-1) to retract into the active valve seat (1-1). At the same time, the other end of the spring guide pin (11) on the active valve seat (1-1) presses against the limit key on the active valve seat (1-1). (13) cone, so that one end of the limit key (13) on the active valve seat (1-1) extends out of the limit hole of the active valve stem (3-4), and at the same time, one end of the spring guide pin (11) on the driven valve seat (5-1) presses against the top of the active valve seat (1-1), and repeat the above steps so that one end of the limit key (13) on the driven valve seat (5-1) extends out of the limit hole of the driven valve stem (6-4), releasing the limit on the active valve core (4) and the driven valve core (7); Step 2: Since the spherical outer surface of the driven valve core (7) is nested in the spherical notch of the active valve core (4), the driven valve stem can only be rotated first to drive the driven valve core (7). The driven valve core (7) restricts the active valve core (4), which is the second locking. By rotating the driven valve stem (6), the driven valve core (7) is driven to rotate. After the driven valve cover (6-2) rotates to the position, the driven valve core (7) rotates to the open state, causing the driven valve cover (6-2) to rotate to the open state. The arc-shaped opening on 6-2) is opposite to the notch of the first valve cover of the active valve (3-2), so that the first valve cover of the active valve (3-2) and the valve core of the active valve (4) can start to rotate. After the valve core of the active valve (4) is fully opened, it is connected to the internal channel of the valve core of the driven valve (7). The first valve cover of the active valve (3-2) limits the first valve cover of the driven valve (6-2). At the same time, the first valve cover of the driven valve (6-2) and the first valve cover of the active valve (3-2) limit the hook plate (2) to complete the third locking. Step 3: After material conveying, reverse the above steps to separate the active valve from the passive valve.

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