Electromagnetic pilot differential piston backwashing valve

Abstract

The electromagnetic pilot differential piston backwashing valve comprises a piston, a main valve seat, a valve body and a valve cover, the valve cover is fixedly installed on one side of the valve body, the main valve seat is fixedly installed in the middle of the valve body, the interior of the valve cover is connected with one end of the piston in a sliding mode, the main valve seat is connected with the other end of the piston in a sliding mode, and a pilot valve is installed at the upper end of the valve body. A water outlet cavity is formed in the right side of the valve body and located in the right side of the piston, the valve body is provided with a pilot hole communicated with the water outlet cavity, the pilot hole is connected with the left side of the piston through a channel, the pilot valve is located above the channel and opens or closes the channel, and the area formed by the valve body and the end face of the valve deck is a water inlet area. The hydraulic differential piston is additionally arranged, and an external pilot valve is adopted to control closing of the piston.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment equipment, in particular to an electromagnetic pilot differential piston backwash valve. Background Art

[0002] Among the water treatment equipment in the field of water treatment, the most common is the plane multi-way valve. The Chinese patent with the patent number ZL 2020 2161344.8 and the name of "Dual-static-plate automatic control multi-way valve" has the advantage of simple structure and long service life by rotating a moving plate and combining it with two static plates on both sides. The patent number ZL 201420568843.7 and the name of "Independent valve hole plane sealing multi-way valve control device" has the advantage of rotating a plane valve core and sealing several independent valve holes on both sides to switch different positions. When the above two types are designed as softening valves, the backwash position is designed as a regeneration and small backwash position, resulting in the lack of a large backwash position of the valve body. The conventional solution to this problem is to increase the position on the plane rotation angle of the multi-way valve, but the product design size increases, the cost increases, and it is incompatible with the filter valve parts of the same specification. Utility Model Content

[0003] The utility model provides an electromagnetic pilot differential piston backwash valve, which is used to solve the problems raised by the background technology.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an electromagnetic pilot differential piston backwash valve, comprising a piston, a main valve seat, a valve body, and a valve cover. The valve cover is fixedly installed on one side of the valve body, and the main valve seat is fixedly installed in the middle of the valve body. The inside of the valve cover is slidably connected to one end of the piston, and the main valve seat is slidably connected to the other end of the piston. A pilot valve is installed on the upper end of the valve body, and the right side of the valve body is a water outlet chamber, and the water outlet chamber is located on the right side of the piston. The valve body is provided with a pilot hole connected to the water outlet chamber, and the pilot hole is connected to the left side of the piston through a channel. The pilot valve is located above the channel, and the pilot valve opens or closes the channel. The area formed by the end faces of the valve body and the valve cover is the water inlet area.

[0005] Preferably, the pilot valve comprises an electromagnetic coil, a pilot valve housing, and a pilot valve core. The electromagnetic coil is installed outside the pilot valve housing, and the pilot valve core is installed inside the electromagnetic coil.

[0006] Preferably, the pilot valve core in the pilot valve is in an ascending position and the channel is open.

[0007] Preferably, the pilot valve core in the pilot valve is in a descending position and the channel is closed.

[0008] Preferably, a damping hole is axially opened on the end surface of the piston, and the damping hole communicates with areas at both axial end surfaces of the piston.

[0009] Preferably, a sealing ring is sleeved on the outside of the piston, and the sealing ring is used to seal the contact portion between the piston and the valve cover.

[0010] Preferably, a sliding hole is opened on one side of the valve cover, and the sliding hole is used for sliding with the piston.

[0011] Beneficial effects of the utility model:

[0012] The utility model discloses an electromagnetic pilot differential piston backwash valve, comprising a piston, a main valve seat, a valve body and a valve cover. The valve cover is fixedly installed on one side of the valve body, and the main valve seat is fixedly installed in the middle of the valve body. The inside of the valve cover is slidably connected to one end of the piston, and the main valve seat is slidably connected to the other end of the piston. A pilot valve is installed on the upper end of the valve body. The right side of the valve body is a water outlet chamber, which is located on the right side of the piston. The valve body is provided with a pilot hole connected to the water outlet chamber, and the pilot hole is connected to the left side of the piston through a channel. The pilot valve is located above the channel, and the pilot valve opens or closes the channel. The area formed by the end faces of the valve body and the valve cover is the water inlet area. The utility model adds a hydraulic differential piston, and adopts an external pilot valve to control the closing of the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an overall diagram of an electromagnetic pilot differential piston backwash valve proposed by the utility model;

[0014] Figure 2 It is a cross-sectional structural diagram of the valve body at AA of an electromagnetic pilot differential piston backwash valve proposed by the utility model;

[0015] Figure 3 It is a structural diagram of a piston of an electromagnetic pilot differential piston backwash valve proposed by the utility model;

[0016] Figure 4 This is a state diagram of a pilot valve of an electromagnetic pilot differential piston backwash valve proposed by the utility model when the power is off;

[0017] Figure 5 The utility model discloses a state diagram of a pilot valve of an electromagnetic pilot differential piston backwash valve when it is energized.

[0018] In the figure, the pilot valve housing 1, the electromagnetic coil 2, the sealing ring 3, the pilot valve core 4, the piston 5, the damping hole 501, the main valve seat 6, the valve body 7, the water outlet cavity 701, the pilot hole 702, the channel 703, the water inlet area 704, the valve cover 8, and the sliding hole 801. DETAILED DESCRIPTION

[0019] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. For the purpose of clarity, many physical details will be described together in the following description. However, it should be understood that these physical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these physical details are not necessary. In addition, for the purpose of simplifying the illustration, some conventional structures and components will be depicted in a simple schematic manner in the illustration.

[0020] like Figure 1-5 As shown, an electromagnetic pilot differential piston backwash valve of the utility model comprises a piston 5, a main valve seat 6, a valve body 7, and a valve cover 8. The valve cover 8 is fixedly installed on one side of the valve body 7, and the main valve seat 6 is fixedly installed in the middle of the valve body 7. The valve cover 8 is slidably connected to one end of the piston 5, and the main valve seat 6 is slidably connected to the other end of the piston 5. A pilot valve is installed on the upper end of the valve body 7. The right side of the valve body 7 is a water outlet chamber 701, and the water outlet chamber 701 is located on the right side of the piston 5. The valve body 7 is provided with a pilot hole 702 connected to the water outlet chamber 701, and the pilot hole 702 is connected to the left side of the piston 5 through a channel 703. The pilot valve is located above the channel 703, and the pilot valve opens or closes the channel 703. The area formed by the end faces of the valve body 7 and the valve cover 8 is a water inlet area 704. A flange hole can be provided on the end face of the valve body 7 located on the side of the water outlet chamber 701 to connect with the outside.

[0021] Furthermore, the pilot valve comprises an electromagnetic coil 2 , a pilot valve housing 1 , and a pilot valve core 4 . The electromagnetic coil 2 is installed outside the pilot valve housing 1 , and the pilot valve core 4 is installed inside the electromagnetic coil 2 .

[0022] Furthermore, the pilot valve core 4 in the pilot valve is in an ascending position, and the channel 703 is opened.

[0023] Furthermore, the pilot valve core 4 in the pilot valve is in a descending position, and the channel 703 is closed.

[0024] Furthermore, a damping hole 501 is axially opened on the end surface of the piston 5 , and the damping hole 501 is connected to the areas at both axial end surfaces of the piston 5 .

[0025] Furthermore, a sealing ring 3 is sleeved on the outside of the piston 5 , and the sealing ring 3 is used to seal the contact portion between the piston 5 and the valve cover 8 .

[0026] Furthermore, a sliding hole 801 is opened on one side of the valve cover 8 , and the sliding hole 801 is used for sliding with the piston 5 .

[0027] Embodiment: The pilot valve is connected to the valve body 7, such as Figure 5As shown, when the pilot valve core 4 is at the lowest end, the lower end of the pilot valve core 4 is closed to the channel 703. The electromagnetic coil 2 is outside the pilot valve housing 1. When energized, the magnetic field generates an upward magnetic force on the pilot valve core 4, which moves the pilot valve core 4 upward to open the pilot valve, so that the channel 703 is opened.

[0028] like Figure 4 As shown, when the electromagnetic coil 2 is energized, the pilot valve core 4 opens upward, the left side of the piston 5 is opened through the channel 703, the pressure on the left side of the piston 5 decreases, and the piston 5 moves to the left under the pressure of the water inlet area 704, and the water inlet area 704 is connected to the water outlet chamber 701.

[0029] Main valve closing process: electromagnetic coil 2 is powered off, pilot valve core 4 moves downward, pilot valve is closed, and the connection between water inlet area 704 and water outlet chamber 701 is cut off. Water in water inlet area 704 flows into the left side of piston 5 through damping hole 501, and the pressure on the left side of piston 5 increases. Due to the area difference between the left and right sides of piston 5, the left chamber force acting on piston 5 is greater than the right chamber force, piston 5 moves to the right, and water inlet area 704 is closed with water outlet chamber 701. Water inlet 705 on valve body 7 is connected with water inlet area 704.

[0030] The above description is only a specific implementation of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the scope of the claims of the utility model.

Claims

1. An electromagnetic pilot differential piston backwash valve, characterized in that: The invention comprises a piston (5), a main valve seat (6), a valve body (7) and a valve cover (8), wherein the valve cover (8) is fixedly mounted on one side of the valve body (7), the main valve seat (6) is fixedly mounted in the middle of the valve body (7), the inside of the valve cover (8) is slidably connected to one end of the piston (5), the main valve seat (6) is slidably connected to the other end of the piston (5), a pilot valve is mounted on the upper end of the valve body (7), the right side of the valve body (7) is a water outlet chamber (701), the water outlet chamber (701) is located on the right side of the piston (5), the valve body (7) is provided with a pilot hole (702) connected to the water outlet chamber (701), the pilot hole (702) is connected to the left side of the piston (5) through a channel (703), the pilot valve is located above the channel (703), the pilot valve opens or closes the channel (703), and the area formed by the end faces of the valve body (7) and the valve cover (8) is a water inlet area (704).

2. The electromagnetic pilot differential piston backwash valve according to claim 1, characterized in that: The pilot valve comprises an electromagnetic coil (1), a pilot valve housing (2), and a pilot valve core (4); the electromagnetic coil (1) is mounted outside the pilot valve housing (2), and the pilot valve core (4) is mounted inside the electromagnetic coil (1).

3. The electromagnetic pilot differential piston backwash valve according to claim 1, characterized in that: The pilot valve core (4) in the pilot valve is in the ascending position and the channel (703) is open.

4. The electromagnetic pilot differential piston backwash valve according to claim 1, characterized in that: The pilot valve core (4) in the pilot valve is in a descending position and the channel (703) is closed.

5. The electromagnetic pilot differential piston backwash valve according to claim 1, characterized in that: A damping hole (501) is axially provided on the end surface of the piston (5), and the damping hole (501) is connected to the areas at both axial end surfaces of the piston (5).

6. The electromagnetic pilot differential piston backwash valve according to claim 5, characterized in that: A sealing ring (3) is sleeved on the outside of the piston (5), and the sealing ring (3) is used to seal the contact portion between the piston (5) and the valve cover (8).

7. The electromagnetic pilot differential piston backwash valve according to claim 1 or 6, characterized in that: A sliding hole (801) is provided on one side of the valve cover (8), and the sliding hole (801) is used for sliding with the piston (5).

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