Automatic three-way duplex ball valve

Abstract

The utility model discloses an automatic three-way duplex ball valve which comprises a duplex ball valve body, a liquid inlet ball, a liquid outlet ball, a liquid inlet valve seat, a liquid outlet valve seat, a liquid inlet end cover, a liquid outlet end cover, a middle rotating rod, an upper rotating rod, a pressing sleeve and a motor. A liquid inlet flow channel and a liquid outlet flow channel are formed in the duplex ball valve body, the liquid inlet flow channel comprises a main liquid inlet, a left branch liquid inlet and a right branch liquid inlet which are communicated with one another, and the liquid outlet flow channel comprises a main liquid outlet, a left branch liquid outlet and a right branch liquid outlet which are communicated with one another. The liquid inlet valve seat, the liquid inlet ball, the liquid inlet valve seat and the liquid inlet end cover are sequentially placed into the liquid inlet flow channel from a left branch liquid inlet of the duplex ball valve body, and the liquid outlet valve seat, the liquid outlet ball, the liquid outlet valve seat and the liquid outlet end cover are sequentially placed into the liquid outlet flow channel from a left branch liquid outlet of the duplex ball valve body. The duplex ball valve is provided with the two ball valves and can have the liquid inlet function and the liquid outlet function at the same time, and the sealing position between the liquid inlet ball and the valve body of the duplex ball valve and the sealing position between the liquid outlet ball and the valve body of the duplex ball valve do not have the liquid leakage phenomenon.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an automatic three-way double ball valve. Background Art

[0002] The electric three-way valve is a key component of the automatic backwash low-pressure filter station. Under normal use of the automatic backwash low-pressure filter station, it plays a role in drainage and controls the opening and closing of the flow path of the automatic backwash low-pressure filter station during backwashing.

[0003] The electric three-way valve used in the automatic backwash low-pressure filter station has only a single valve, which only has the function of inlet or outlet of liquid, and leakage is prone to occur between the valve and the valve body. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide an automatic three-way double ball valve in view of the deficiencies of the above-mentioned prior art. The automatic three-way double ball valve has two ball valves, namely a liquid inlet ball and a liquid outlet ball, which can have the functions of liquid inlet and liquid outlet at the same time, and the liquid inlet ball rotates with the inner wall of the double ball valve body through the liquid inlet valve seat seal, and the liquid outlet ball rotates with the inner wall of the double ball valve body through the liquid outlet valve seat seal, and no leakage will occur at the sealing part between the liquid inlet ball and the valve body of the double ball valve, and at the sealing part between the liquid outlet ball and the valve body of the double ball valve.

[0005] In order to achieve the above technical purpose, the technical solution adopted by the utility model is:

[0006] An automatic three-way double ball valve, comprising a double ball valve body, a liquid inlet ball, a liquid outlet ball, a liquid inlet valve seat, a liquid outlet valve seat, a liquid inlet end cover, a liquid outlet end cover, a middle rotating rod, an upper rotating rod, a pressing sleeve and a motor;

[0007] The double ball valve body is provided with an inlet channel and an outlet channel, the inlet channel includes a main inlet, a left branch inlet and a right branch inlet which are interconnected, and the outlet channel includes a main outlet, a left branch outlet and a right branch outlet which are interconnected, wherein the main inlet and the main outlet are arranged on the front side of the double ball valve body, the left branch inlet and the left branch outlet are arranged on the left side of the double ball valve body, and the right branch inlet and the right branch outlet are arranged on the right side of the double ball valve body;

[0008] The top of the double ball valve body is provided with an upper rotating rod hole connected to the liquid inlet flow channel, and the middle of the double ball valve body is provided with a middle rotating rod hole connected to the liquid inlet flow channel and the liquid outlet flow channel respectively;

[0009] An inlet valve seat, an inlet ball, another inlet valve seat and an inlet end cover are sequentially placed into the inlet flow channel from the left inlet port of the double ball valve body. Two sides of one inlet valve seat are in sealing contact with the inner wall of the inlet flow channel and the inlet ball respectively, and two sides of the other inlet valve seat are in sealing contact with the inlet end cover and the inlet ball respectively. The inlet ball can rotate in a sealed manner between the two inlet valve seats.

[0010] The liquid inlet ball is provided with a main liquid inlet and two liquid branching ports, which are connected to each other to form a T-shaped ball hole. The main liquid inlet on the liquid inlet ball is connected to the main liquid inlet of the double ball valve body, one liquid branching port on the liquid inlet ball is connected to the left liquid branching port of the double ball valve body, and the other liquid branching port on the liquid inlet ball is connected to the right liquid branching port of the double ball valve body.

[0011] A liquid outlet valve seat, a liquid outlet ball, another liquid outlet valve seat and a liquid outlet end cover are sequentially placed into the liquid outlet flow channel from the left liquid outlet of the double ball valve body, two sides of one liquid outlet valve seat are respectively in sealing contact with the inner wall of the liquid outlet flow channel and the liquid outlet ball, two sides of the other liquid outlet valve seat are respectively in sealing contact with the liquid outlet end cover and the liquid outlet ball, and the liquid outlet ball can be sealed and rotated between the two liquid outlet valve seats;

[0012] The liquid outlet ball is provided with a main liquid port and two liquid branch ports, which are connected to each other to form a T-shaped ball hole. The main liquid port on the liquid outlet ball is connected to the main liquid outlet of the double ball valve body, one liquid branch port on the liquid outlet ball is connected to the left liquid branch port of the double ball valve body, and the other liquid branch port on the liquid outlet ball is connected to the right liquid branch port of the double ball valve body.

[0013] The motor is connected to the double ball valve body, a compression sleeve is sealed in the upper rotation rod hole, the upper rotation rod is rotatably and sealably connected inside the compression sleeve, the output end of the motor is connected to one end of the upper rotation rod, the other end of the upper rotation rod is connected to the liquid inlet ball, one end of the middle rotation rod is connected to the liquid inlet ball, and the other end is connected to the liquid outlet ball, the middle rotation rod is located in the middle rotation rod hole, and the middle rotation rod is sealed and rotatably connected to the middle rotation rod hole.

[0014] As a further improved technical solution of the utility model, the upper rotating rod hole is threadedly connected with the pressing sleeve, and a sealing ring is arranged between the upper rotating rod hole and the pressing sleeve; the pressing sleeve and the upper rotating rod are rotationally sealed and connected via a sealing ring and a gasket; the middle rotating rod and the middle rotating rod hole are rotationally sealed and connected via a sealing ring.

[0015] As a further improved technical solution of the utility model, the end face of the liquid inlet end cover is flush with the end face of the left liquid inlet of the double ball valve body, and the end face of the liquid outlet end cover is flush with the end face of the left liquid outlet of the double ball valve body.

[0016] As a further improved technical solution of the utility model, the outer circumferential surface of the liquid inlet end cover is provided with a sealing ring groove, a sealing ring is installed in the sealing ring groove, and the liquid inlet end cover is sealed and connected to the inner wall of the liquid inlet channel through the sealing ring.

[0017] As a further improved technical solution of the utility model, the outer circumferential surface of the liquid outlet cover is provided with a sealing ring groove, a sealing ring is installed in the sealing ring groove, and the liquid outlet cover is sealed and connected to the inner wall of the liquid outlet channel through the sealing ring.

[0018] As a further improved technical solution of the utility model, the motor is connected to the top of the double ball valve body by bolts.

[0019] As a further improved technical solution of the utility model, the liquid inlet ball, the liquid outlet ball, the pressure sleeve, the upper rotation rod and the middle rotation rod are made of steel.

[0020] As a further improved technical solution of the utility model, the liquid inlet valve seat and the liquid outlet valve seat are made of nylon.

[0021] The beneficial effects of the utility model are:

[0022] The utility model has two ball valves, namely, a liquid inlet ball and a liquid outlet ball, which can have the functions of liquid inlet and liquid outlet at the same time. The liquid inlet ball rotates with the inner wall of the double ball valve body through the liquid inlet valve seat annular seal, and the liquid outlet ball rotates with the inner wall of the double ball valve body through the liquid outlet valve seat annular seal. The middle rotating rod is connected with the middle rotating rod hole seal rotationally. The liquid flowing in can only enter from the main liquid port of the liquid inlet ball and exit from the two liquid outlets. The liquid flowing in can only enter from the two liquid outlets of the liquid outlet ball and exit from the main liquid port. This structure prevents the liquid in each passage from mixing internally; the sealing between the liquid inlet ball and the double ball valve body, and the sealing between the liquid outlet ball and the double ball valve body will not leak. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front cross-sectional view of the automatic three-way double ball valve of the utility model.

[0024] Figure 2 It is a side sectional view of the automatic three-way double ball valve of the utility model.

[0025] Figure 3 It is a top view of the cross-section of the automatic three-way double ball valve of the utility model. DETAILED DESCRIPTION

[0026] The specific implementation of the utility model is further described below according to the accompanying drawings:

[0027] like Figures 1 to 3As shown, an automatic three-way double ball valve includes a double ball valve body 1, a liquid inlet ball 2, a liquid inlet valve seat 3, a liquid inlet end cover 4, a middle rotating rod 5, a liquid outlet ball 6, a liquid outlet valve seat 7, a liquid outlet end cover 8, a pressing sleeve 9, an upper rotating rod 10 and a motor 11.

[0028] like Figures 1 to 3 As shown, the double ball valve body 1 is provided with a liquid inlet channel and a liquid outlet channel, the liquid inlet channel includes a main liquid inlet 101, a left branch liquid inlet 103 and a right branch liquid inlet 102 which are interconnected, and the liquid outlet channel includes a main liquid outlet 104, a left branch liquid outlet 106 and a right branch liquid outlet 105 which are interconnected, wherein the main liquid inlet 101 and the main liquid outlet 104 are arranged on the front side of the double ball valve body 1, the left branch liquid inlet 103 and the left branch liquid outlet 106 are arranged on the left side of the double ball valve body 1, and the right branch liquid inlet 102 and the right branch liquid outlet 105 are arranged on the right side of the double ball valve body 1.

[0029] An upper rotating rod hole communicating with the liquid inlet channel is formed at the top of the double ball valve body 1, and a middle rotating rod hole communicating with the liquid inlet channel and the liquid outlet channel is formed in the middle of the double ball valve body 1.

[0030] An inlet valve seat 3, an inlet ball 2, another inlet valve seat 3 and an inlet end cover 4 are sequentially placed into the inlet channel from the left inlet port 103 of the double ball valve body 1. The two sides of one inlet valve seat 3 are respectively in sealing contact with the inner wall of the inlet channel and the inlet ball 2, and the two sides of the other inlet valve seat 3 are respectively in sealing contact with the inlet end cover 4 and the inlet ball 2. The inlet ball 2 can be sealed and rotated between the two inlet valve seats 3. The inlet valve seat 3 is a circular ring structure.

[0031] The liquid inlet ball 2 is provided with a main liquid port and two liquid branch ports, which are interconnected to form a T-shaped ball hole. The main liquid port on the liquid inlet ball 2 is connected to the main liquid inlet 101 of the double ball valve body 1, one liquid branch port on the liquid inlet ball 2 is connected to the left liquid branch port 103 of the double ball valve body 1, and the other liquid branch port on the liquid inlet ball 2 is connected to the right liquid branch port 102 of the double ball valve body 1.

[0032] One liquid outlet valve seat 7, liquid outlet ball 6, another liquid outlet valve seat 7 and liquid outlet end cover 8 are sequentially placed into the liquid outlet channel from the left branch liquid outlet 106 of the double ball valve body 1, and both sides of one liquid outlet valve seat 7 are in sealing contact with the inner wall of the liquid outlet channel and the liquid outlet ball 6, and both sides of the other liquid outlet valve seat 7 are in sealing contact with the liquid outlet end cover 8 and the liquid outlet ball 6, respectively, and the liquid outlet ball 6 can be sealed and rotated between the two liquid outlet valve seats 7. The liquid outlet valve seat 7 is a circular ring structure.

[0033] The liquid outlet ball 6 is provided with a main liquid port and two liquid branch ports, which are interconnected to form a T-shaped ball hole. The main liquid port on the liquid outlet ball 6 is connected to the main liquid outlet 104 of the double ball valve body 1, one liquid branch port on the liquid outlet ball 6 is connected to the left liquid branch port 106 of the double ball valve body 1, and the other liquid branch port on the liquid outlet ball 6 is connected to the right liquid branch port 105 of the double ball valve body 1.

[0034] The motor 11 is connected to the top of the double ball valve body 1 by bolts, the upper rotating rod hole is threadedly connected with the pressing sleeve 9, the pressing sleeve 9 is located in the upper rotating hole, and a sealing ring is arranged between the upper rotating rod hole and the pressing sleeve 9 to ensure the sealing connection between the two, the pressing sleeve 9 and the upper rotating rod 10 are rotationally sealed and connected through a sealing ring and a gasket 12, the output end of the motor 11 is connected to one end of the upper rotating rod 10, and the other end of the upper rotating rod 10 is connected to the liquid inlet ball 2, one end of the middle rotating rod 5 is connected to the liquid inlet ball 2, and the other end is connected to the liquid outlet ball 6, the middle rotating rod 5 is located in the middle rotating rod hole, and the middle rotating rod 5 is rotationally sealed and connected to the middle rotating rod hole through a sealing ring.

[0035] The end surface of the liquid inlet end cover 4 is flush with the end surface of the left liquid inlet 103 of the double ball valve body 1, and the end surface of the liquid outlet end cover 8 is flush with the end surface of the left liquid outlet 106 of the double ball valve body 1.

[0036] The outer circumferential surface of the liquid inlet end cover 4 is provided with a sealing ring groove, in which a sealing ring is installed, and the liquid inlet end cover 4 is sealed and connected to the inner wall of the liquid inlet channel through the sealing ring.

[0037] The outer circumferential surface of the liquid outlet end cover 8 is provided with a sealing ring groove, and a sealing ring is installed in the sealing ring groove. The liquid outlet end cover 8 is sealed and connected to the inner wall of the liquid outlet flow channel through the sealing ring. The end faces of the liquid inlet end cover 4 and the liquid outlet end cover 8 are both provided with sealing rings. When the double ball valve body 1 is connected to the flange on the pipeline by bolts, the sealing connection between the flange on the external pipeline and the liquid outlet end cover 8 is guaranteed. The end faces of the main liquid inlet 101, the right branch liquid inlet 102, the main liquid outlet 104, and the right branch liquid outlet 105 of the double ball valve body 1 are also provided with sealing rings, which are convenient for sealing connection with the flange on the pipeline.

[0038] The liquid inlet ball 2, the liquid outlet ball 6, the pressing sleeve 9, the upper rotating rod 10 and the middle rotating rod 5 are made of steel.

[0039] The liquid inlet valve seat 3 and the liquid outlet valve seat 7 are made of nylon.

[0040] The inlet ball 2 and outlet ball 6 of this embodiment are used to control the direction of the passage as the motor 11 rotates. The inlet valve seat 3 and outlet valve seat 7 are used to fix the position of the inlet ball 2 and outlet ball 6, and seal the flow path to prevent leakage of the internal pipeline of the ball valve. The middle rotating rod 5 is used to rotate the upper and lower inlet balls 2 and outlet balls 6 at the same time. The upper rotating rod 10 is used to be connected to the motor 11, and the inlet ball 2 is driven to rotate by the motor 11.

[0041] The automatic three-way double ball valve of this embodiment can be used in an automatic backwashing low-pressure filter station. For example, the main liquid inlet 101 of the automatic three-way double ball valve is connected to the liquid inlet pipe, the left branch liquid inlet 103 and the right branch liquid inlet 102 are respectively connected to the water inlets of two filters in the automatic backwashing low-pressure filter station through pipes, the water outlets of the two filters are respectively connected to the left branch liquid outlet 106 and the right branch liquid outlet 105 of the automatic three-way double ball valve, the main liquid outlet 104 of the automatic three-way double ball valve is connected to the liquid outlet pipe, and the water outlets of the two filters are connected by a short-circuit pipe. During normal operation, the main liquid inlet 101, the left branch liquid inlet 103 and the right branch liquid inlet 102 of the liquid inlet flow channel of the automatic three-way double ball valve are connected, and the main liquid outlet 104, the left branch liquid outlet 106 and the right branch liquid outlet 105 of the liquid outlet flow channel are connected. The liquid enters the main liquid inlet 101 of the automatic three-way double ball valve from the liquid inlet pipe, and then enters the water inlets of the two filters through the left branch liquid inlet 103 and the right branch liquid inlet 102 respectively. After being filtered by the filters, the liquid enters the left branch liquid outlet 106 and the right branch liquid outlet 105 of the automatic three-way double ball valve from the water outlets of the two filters respectively, and finally flows out from the main liquid outlet 104 and the liquid outlet pipe of the automatic three-way double ball valve. At this time, the automatic backwashing low-pressure filter station obtains the maximum filtering liquid function, thereby increasing the filtering efficiency. The liquid inlet ball 2 and the liquid inlet valve seat 3 are annular seals, and the liquid flowing in can only flow out from the T-shaped ball hole of the liquid inlet ball 2. This structure prevents the liquids in each passage from mixing inside; similarly, the liquid outlet ball 6 and the liquid outlet valve seat 7 are annular seals, and the liquid flowing in can only flow out from the T-shaped ball hole of the liquid outlet ball 6. This structure prevents the liquids in each passage from mixing inside.

[0042] When it is necessary to backwash one of the filters of the automatic backwashing low-pressure filter station, just start the motor 11 to drive the inlet ball 2 and the outlet ball 6 to rotate, so that the flow path where the filter to be backwashed is located is in a closed state (such as the right branch inlet 102 and the right branch outlet 105 of the automatic three-way double ball valve are both in a closed state), and open the sewage discharge solenoid valve in the flow path at the same time, the filter can be backwashed and the washed dirt can be discharged. After the flushing is completed, close the sewage discharge solenoid valve in the flow path, and start the motor 11 to drive the inlet ball 2 and the outlet ball 6 to rotate, so that the flow path is in a connected state (such as the right branch inlet 102 of the automatic three-way double ball valve is in a connected state with the main inlet 101, and the right branch outlet 105 is in a connected state with the main outlet 104), and it can be put into use. During backwashing, the specific flow direction of the liquid is that the liquid enters the main liquid inlet 101 of the automatic three-way double ball valve from the liquid inlet pipe, and then enters the water inlet of a filter through the left branch liquid inlet 103 that is not blocked, and after being filtered by the filter, enters the left branch liquid outlet 106 of the automatic three-way double ball valve from the water outlet of the filter, and finally flows out from the main liquid outlet 104 of the automatic three-way double ball valve and the liquid outlet pipe, and enters the filter to be backwashed from the water outlet of the filter through the short-circuit pipe and the water outlet of the filter to be backwashed. The sewage after backwashing comes out from the water inlet of the filter to be backwashed and is discharged through the sewage solenoid valve and the sewage pipe.

[0043] When it is time to backwash another filter, the procedure is the same as the previous steps.

[0044] If the filter element in the filter needs to be repaired or replaced, just start the motor 11 to drive the liquid inlet ball 2 and the liquid outlet ball 6 to rotate, so that the path is in a closed state, and at the same time open the sewage discharge solenoid valve in the flow path to release the pressure, and then the filter can be repaired or the filter element in the filter can be replaced.

[0045] If the flow rate needs to be increased and the filtering flow rate is not required, the motor 11 can be started to drive the liquid inlet ball 2 and the liquid outlet ball 6 to rotate, so that the left liquid inlet 103 and the left liquid outlet 106 of the automatic three-way double ball valve are closed, or the right liquid inlet 102 and the right liquid outlet 105 are closed, so that only one path is used to allow the liquid to flow into the filter for filtration.

[0046] The automatic three-way double ball valve has two ball valves, namely the liquid inlet ball 2 and the liquid outlet ball 6, which can have the functions of liquid inlet and liquid outlet at the same time. The liquid inlet ball 2 and the inner wall of the double ball valve body 1 are sealed and rotated through the liquid inlet valve seat 3, that is, the liquid inlet ball 2 and the liquid inlet valve seat 3 are annular seals, and the liquid outlet ball 6 and the inside of the double ball valve body 1 are sealed and rotated through the liquid outlet valve seat 7, that is, the liquid outlet ball 6 and the liquid outlet valve seat 7 are annular seals. The liquid flowing in can only enter the main liquid port of the liquid inlet ball 2 and exit the two liquid outlets, and the liquid flowing in can only enter the two liquid outlets of the liquid outlet ball 6 and exit the main liquid port. This structure prevents the liquids in each passage from mixing inside.

[0047] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. An automatic three-way double ball valve, characterized in that: It includes a double ball valve body, a liquid inlet ball, a liquid outlet ball, a liquid inlet valve seat, a liquid outlet valve seat, a liquid inlet end cover, a liquid outlet end cover, a middle rotating rod, an upper rotating rod, a pressing sleeve and a motor; The double ball valve body is provided with an inlet channel and an outlet channel, the inlet channel includes a main inlet, a left branch inlet and a right branch inlet which are interconnected, and the outlet channel includes a main outlet, a left branch outlet and a right branch outlet which are interconnected, wherein the main inlet and the main outlet are arranged on the front side of the double ball valve body, the left branch inlet and the left branch outlet are arranged on the left side of the double ball valve body, and the right branch inlet and the right branch outlet are arranged on the right side of the double ball valve body; The top of the double ball valve body is provided with an upper rotating rod hole connected to the liquid inlet flow channel, and the middle of the double ball valve body is provided with a middle rotating rod hole connected to the liquid inlet flow channel and the liquid outlet flow channel respectively; An inlet valve seat, an inlet ball, another inlet valve seat and an inlet end cover are sequentially placed into the inlet flow channel from the left inlet port of the double ball valve body. Two sides of one inlet valve seat are in sealing contact with the inner wall of the inlet flow channel and the inlet ball respectively, and two sides of the other inlet valve seat are in sealing contact with the inlet end cover and the inlet ball respectively. The inlet ball can rotate in a sealed manner between the two inlet valve seats. The liquid inlet ball is provided with a main liquid inlet and two liquid branching ports, which are connected to each other to form a T-shaped ball hole. The main liquid inlet on the liquid inlet ball is connected to the main liquid inlet of the double ball valve body, one liquid branching port on the liquid inlet ball is connected to the left liquid branching port of the double ball valve body, and the other liquid branching port on the liquid inlet ball is connected to the right liquid branching port of the double ball valve body. A liquid outlet valve seat, a liquid outlet ball, another liquid outlet valve seat and a liquid outlet end cover are sequentially placed into the liquid outlet flow channel from the left liquid outlet of the double ball valve body, two sides of one liquid outlet valve seat are respectively in sealing contact with the inner wall of the liquid outlet flow channel and the liquid outlet ball, two sides of the other liquid outlet valve seat are respectively in sealing contact with the liquid outlet end cover and the liquid outlet ball, and the liquid outlet ball can be sealed and rotated between the two liquid outlet valve seats; The liquid outlet ball is provided with a main liquid port and two liquid branch ports, which are connected to each other to form a T-shaped ball hole. The main liquid port on the liquid outlet ball is connected to the main liquid outlet of the double ball valve body, one liquid branch port on the liquid outlet ball is connected to the left liquid branch port of the double ball valve body, and the other liquid branch port on the liquid outlet ball is connected to the right liquid branch port of the double ball valve body. The motor is connected to the double ball valve body, a compression sleeve is sealed in the upper rotation rod hole, the upper rotation rod is rotatably and sealably connected inside the compression sleeve, the output end of the motor is connected to one end of the upper rotation rod, the other end of the upper rotation rod is connected to the liquid inlet ball, one end of the middle rotation rod is connected to the liquid inlet ball, and the other end is connected to the liquid outlet ball, the middle rotation rod is located in the middle rotation rod hole, and the middle rotation rod is sealed and rotatably connected to the middle rotation rod hole.

2. The automatic three-way double ball valve according to claim 1, characterized in that: The upper rotating rod hole is threadedly connected with the pressing sleeve, and a sealing ring is arranged between the upper rotating rod hole and the pressing sleeve; the pressing sleeve and the upper rotating rod are rotationally sealed and connected through the sealing ring and the gasket; the middle rotating rod and the middle rotating rod hole are sealingly and rotationally connected through the sealing ring.

3. The automatic three-way double ball valve according to claim 1, characterized in that: The end surface of the liquid inlet end cover is flush with the end surface of the left liquid inlet of the double ball valve body, and the end surface of the liquid outlet end cover is flush with the end surface of the left liquid outlet of the double ball valve body.

4. The automatic three-way double ball valve according to claim 1, characterized in that: The outer circumferential surface of the liquid inlet end cover is provided with a sealing ring groove, a sealing ring is installed in the sealing ring groove, and the liquid inlet end cover is sealed and connected with the inner wall of the liquid inlet flow channel through the sealing ring.

5. The automatic three-way double ball valve according to claim 1, characterized in that: The outer circumferential surface of the liquid outlet end cover is provided with a sealing ring groove, a sealing ring is installed in the sealing ring groove, and the liquid outlet end cover is sealed and connected with the inner wall of the liquid outlet flow channel through the sealing ring.

6. The automatic three-way double ball valve according to claim 1, characterized in that: The motor is connected to the top of the double ball valve body by bolts.

7. The automatic three-way double ball valve according to claim 1, characterized in that: The liquid inlet ball, liquid outlet ball, pressure sleeve, upper rotation rod and middle rotation rod are made of steel.

8. The automatic three-way double ball valve according to claim 1, characterized in that: The liquid inlet valve seat and the liquid outlet valve seat are made of nylon.

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