Fluid control interchange valve

Abstract

The utility model discloses a fluid control interchange valve which comprises an external pilot structure, a first valve body and a second valve body are arranged below the external pilot structure, an upper crater assembly is arranged between the first valve body and the second valve body, a first cavity is formed in the first valve body, a second cavity is formed in the second valve body, and the first cavity is communicated with the second cavity. A lower crater assembly is arranged in the second cavity, a first channel mechanism capable of being connected to the second valve body is arranged in the upper crater assembly, and a second channel mechanism capable of being connected to the second valve body is arranged in the lower crater assembly. A control mechanism used for controlling the vertical position of the piston rod sealing assembly is arranged in the first valve body, the product has the advantages of being compact in structure, small in size, high in corrosion resistance, easy to use, simple in software design, safe and reliable in work, long in service life and the like, and the product is simple in structure and convenient to use.

Description

Technical Field

[0001] The utility model relates to a solenoid valve, in particular to a fluid control interchange valve. Background Art

[0002] At present, most of the solenoid valves on the market are two-position two-way on-off or closed-type solenoid valves or two-position three-way solenoid valves.

[0003] The externally piloted two-position three-way pneumatic control valve can well realize fluid diversion or switching between two fluids. In actual use, it is mostly controlled by two fluid valves, which requires a relatively large installation space, has complex wiring, is error-prone, and also brings difficulties to software design, actual algorithms, etc., increases costs, and has unsatisfactory safety and reliability and a short service life. Especially in industries with strong corrosiveness such as epoxy resin glue and its cleaning, there are disadvantages such as a very short service life, greatly reducing production efficiency, increasing production costs, and the product quality is also not satisfactory, and it is urgent to improve the product performance here.

[0004] Currently, the combination control of two direct-acting solenoid valves brings disadvantages such as complex structure, large occupied installation space, complex software design and wiring, small suction force of the direct-acting solenoid valve, unreliable fluid control, and short service life.

[0005] Therefore, the existing solenoid valves need to be further improved. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a fluid control interchange valve, which can achieve the advantages of compact structure, small volume, strong corrosion resistance, simple use, simple software design, safe and reliable operation, and long service life.

[0007] To achieve the above purpose, the utility model adopts the following scheme:

[0008] A fluid control interchange valve includes an external pilot structure. A first valve body and a second valve body are arranged below the external pilot structure. An upper fire crater assembly is arranged between the first valve body and the second valve body. A first cavity is arranged in the first valve body. A second cavity is arranged in the second valve body. A lower fire crater assembly is arranged in the second cavity. A first channel mechanism capable of connecting to the second valve body is arranged in the upper fire crater assembly. A second channel mechanism capable of connecting to the second valve body is arranged in the lower fire crater assembly. A discharge interface capable of communicating with the second cavity is arranged on the second valve body. A piston rod sealing assembly capable of blocking the first channel mechanism or the second channel mechanism is arranged on the upper fire crater assembly in a vertically movable manner. A control mechanism for controlling the vertical position of the piston rod sealing assembly is arranged in the first valve body.

[0009] Further, the external pilot structure includes an upper component, and a terminal is provided on the upper component.

[0010] Further, the first channel mechanism includes a first vertical channel disposed in the upper volcanic vent assembly, and a first interface and a second interface that are communicable with the first vertical channel are disposed outside the second valve body.

[0011] Further, the second channel mechanism includes a second vertical channel disposed in the lower volcanic vent assembly, and a third interface and a fourth interface that are communicable with the second vertical channel are disposed outside the second valve body.

[0012] Further, the discharge interface is disposed between the first channel mechanism and the second channel mechanism.

[0013] Further, the piston rod seal assembly includes a piston rod movably disposed in the first vertical channel. An inner groove is provided in the middle of the piston rod. The diameter of the inner groove is smaller than that of the first vertical channel. A sealing structure for closing the upper volcanic vent assembly or the lower volcanic vent assembly is provided at the lower end of the piston rod.

[0014] Further, the control mechanism includes a first air port and a second air port that are disposed on both sides of the first valve body and communicate with the first cavity, and a spring seat is provided at the upper end of the piston rod.

[0015] Further, the control mechanism further includes a compression spring disposed on the upper surface of the spring seat and the upper surface of the first valve body.

[0016] Further, the control mechanism further includes a compression spring disposed on the lower surface of the spring seat and the upper surface of the upper volcanic vent assembly.

[0017] In summary, the beneficial effects of the present utility model relative to the prior art are as follows:

[0018] The present utility model solves the deficiencies existing in the existing solenoid valves. Through the structural arrangement of the present utility model, the following advantages are achieved. This product has the advantages of compact structure, small volume, strong corrosion resistance, simple use, simple software design, safe and reliable operation, long service life, etc., and has a simple structure and is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is one of the three-dimensional views of the present utility model;

[0020] Figure 2 is the second three-dimensional view of the present utility model;

[0021] Figure 3 is a schematic diagram of the first state of the double-acting type of the present utility model;

[0022] Figure 4 Schematic diagram of the second state of the double-acting type of the present utility model;

[0023] Figure 5 Schematic diagram of the first state of the normally closed type of the present utility model;

[0024] Figure 6 Schematic diagram of the second state of the normally closed type of the present utility model;

[0025] Figure 7 Schematic diagram of the first state of the normally open type of the present utility model;

[0026] Figure 8 Schematic diagram of the second state of the normally open type of the present utility model. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to Figure 1-8 , the present utility model provides a fluid control interchange valve, including an external pilot structure 1. A first valve body 2 and a second valve body 3 are arranged below the external pilot structure 1. An upper volcanic port assembly 4 is arranged between the first valve body 2 and the second valve body 3. A first cavity 5 is arranged in the first valve body 2. A second cavity 6 is arranged in the second valve body 3. A lower volcanic port assembly 70 is arranged in the second cavity 6. A first channel mechanism 7 capable of being connected to the second valve body 3 is arranged in the upper volcanic port assembly 4. A second channel mechanism 8 capable of being connected to the second valve body 3 is arranged in the lower volcanic port assembly 70. A total interface 9 capable of communicating with the second cavity 6 is arranged on the second valve body 3. A piston rod sealing assembly 10 capable of blocking the first channel mechanism 7 or the second channel mechanism 8 is arranged on the upper volcanic port assembly 4 in a vertically movable manner. A control mechanism 11 for controlling the vertical position of the piston rod sealing assembly 10 is arranged in the first valve body 2;

[0029] The first fluid enters the second valve body 3 from the first channel mechanism 7;

[0030] The second fluid enters the second valve body 3 from the second channel mechanism 8;

[0031] Control the up and down movement of the piston rod sealing assembly 10 to make the piston rod sealing assembly 10 close one of the lower crater assembly 70 or the upper crater assembly 4;

[0032] When closing the upper crater assembly 4, the first channel mechanism 7 is in a state of communicating with the inside of the second valve body 3. At this time, the first fluid can be discharged from the total interface 9;

[0033] When closing the lower crater assembly 70, the second channel mechanism 8 is in a state of communicating with the inside of the second valve body 3. At this time, the second fluid can be discharged from the total interface 9.

[0034] The up and down movement of the piston rod sealing assembly 10 is controlled by the control mechanism 11.

[0035] The external pilot structure 1 of the present utility model includes an upper component 101, and a terminal 102 is provided on the upper component 101;

[0036] The terminal 102 is divided into a first terminal and a second terminal, which are respectively connected to the positive and negative poles of the power supply.

[0037] The first channel mechanism 7 of the present utility model includes a first vertical channel 701 provided in the upper crater assembly 4, and a first interface 702 and a second interface 703 that can communicate with the first vertical channel 701 are provided outside the second valve body 3.

[0038] The second channel mechanism 8 of the present utility model includes a second vertical channel 801 provided in the lower crater assembly 70, and a third interface 802 and a fourth interface 803 that can communicate with the second vertical channel 801 are provided outside the second valve body 3.

[0039] The total interface 9 of the present utility model is provided between the first channel mechanism 7 and the second channel mechanism 8.

[0040] The piston rod sealing assembly 10 of the present utility model includes a piston rod 1001 movably arranged in the first vertical channel 701. An inner groove 1002 is provided in the middle of the piston rod 1001. The diameter of the inner groove 1002 is smaller than that of the first vertical channel 701. A sealing structure 1003 for closing the upper crater assembly 4 or the lower crater assembly 70 is provided at the lower end of the piston rod 1001.

[0041] The control mechanism 11 of the present utility model includes a first air port 111 and a second air port 112 which are arranged on both sides of the first valve body 2 and communicate with the first cavity 5. A spring seat 114 is arranged at the upper end of the piston rod 1001; the above structure is a double-acting structure. By connecting and discharging compressed gas through the first air port 111 and the second air port 112, the first valve body 2 is in a negative pressure or inflated state, so as to push the piston rod sealing assembly 10 to move up and down;

[0042] In the double-acting structure, when the main interface 9 is a fluid inlet: when compressed gas is connected to the first air port 111 and the terminal is connected to the power supply but not energized, the second air port 112 discharges waste gas, and the lower sealing surface of the piston rod sealing assembly is closely attached to the lower crater sealing surface for sealing, and the third interface 802 and the fourth interface 803 are blocked from the main interface 9; at the same time, the upper sealing surface of the piston rod sealing assembly is away from the sealing surface of the upper crater. At this time, the first interface 702 and the second interface 703 are connected to the main interface 9, and the fluid enters the valve from the main interface 9 and flows out from the first interface 702 and the second interface 703. When compressed gas is connected to the first air port 111 and the terminal is energized, the second air port 112 discharges waste gas, and the piston rod sealing assembly runs upward under the action of air pressure, and the upper sealing surface of the piston rod sealing assembly 4 is closely attached to the sealing surface of the upper crater assembly for sealing; at this time, the third interface 802 and the fourth interface 803 are connected to the main interface 9, and at the same time the first interface 702 and the second interface 703 are blocked from the main interface 9, and the fluid flows out from the third interface 802 and the fourth interface 803, completing the diversion of the same fluid (functions such as supplying different production lines or discharging defective fluids, etc.);

[0043] A muffler is installed at the first air port 111;

[0044] The control mechanism 11 of the present utility model further includes a downward pressure spring 113 which is arranged on the upper surface of the spring seat 114 and the upper surface of the first valve body 2. The above structure is a normally closed structure. Under the pressing of the downward pressure spring 113, the lower crater assembly 70 is in a closed state, and the upper crater assembly 4 is in an open state; by connecting and discharging compressed gas through the first air port 111 and the second air port 112, when the gas is discharged from the second cavity 6, the piston rod sealing assembly 10 moves upward;

[0045] In the normally closed structure, compressed gas is introduced into the first air port 111. When the power supply is not energized, the third interface 802 and the fourth interface 803 are connected to the liquid inlet of the fluid, the first interface 702 and the second interface 703 are connected to the liquid inlet of the fluid, and the total interface 9 is the liquid outlet. Under the action of the downward pressure spring 113, the lower sealing surface of the piston rod sealing assembly is closely attached to the sealing surface of the lower crater assembly for sealing. The first interface 702 and the second interface 703 are connected to the total interface 9, the piston rod sealing assembly is away from the upper crater assembly, the third interface 802 and the fourth interface 803 are blocked from the total interface 9. At this time, the fluid flows into the valve from the first interface 702 and the second interface 703 and flows out from the total interface 9. When the first air port 111 is still connected to the compressed gas and the two terminal posts are powered at the same time, the piston rod sealing assembly moves upward under the combined action of the air pressure and the downward pressure spring 113, and the upper sealing surface of the piston rod sealing assembly is closely attached to the sealing surface of the upper crater assembly for sealing. At this time, the third interface 802 and the fourth interface 803 are connected to the total interface 9, and at the same time the first interface 702 and the second interface 703 are blocked from the total interface 9. The fluid enters the valve from the third interface 802 and the fourth interface 803 and flows out from the total interface 9.

[0046] The exchange of two fluids with each other is completed.

[0047] Different fluids are connected to the two fluid inlets respectively, and the fluid is changed by switching the channels.

[0048] In the normally closed structure of the present invention, fluid 1 and fluid 2 can be exchanged to access the interfaces

[0049] The control mechanism 11 of the present utility model further includes an upper pressure spring 115 arranged on the lower surface of the spring seat 114 and the upper surface of the upper crater assembly 4. The above structure is a normally open structure. Under the pressing of the upper pressure spring 115, the lower crater assembly 70 is in an open state and the upper crater assembly 4 is in a closed state. The entry and discharge of compressed gas are connected through the first air port 111 and the second air port 112. When the second cavity 6 is inflated with gas, the piston rod sealing assembly 10 moves downward.

[0050] In the normally-closed structure of the invention, when it is the fluid inlet: the first air port 111 is connected to compressed gas. When the terminal block is connected to the power supply and not energized, the lower sealing surface of the piston rod sealing assembly is in close contact with the lower crater sealing surface for sealing, and the third interface 802 and the fourth interface 803 are blocked from the total interface 9; at the same time, the upper sealing surface of the piston rod sealing assembly is away from the sealing surface of the upper crater. At this time, the first interface 702 and the second interface 703 are connected to the total interface 9, and the fluid enters the valve from the total interface 9 and flows out from the first interface 702 and the second interface 703. When the first air port 111 is still connected to compressed gas and the terminal block is energized, the piston rod sealing assembly runs upward under the combined action of the air pressure and the upper compression spring 115, and the upper sealing surface of the piston rod sealing assembly is in close contact with the sealing surface of the upper crater assembly for sealing; at this time, the total interface 9 is connected to the third interface 802 and the fourth interface 803, and at the same time the first interface 702 and the second interface 703 are blocked, and the fluid flows out from the third interface 802 and the fourth interface 803, completing the diversion of the same fluid (functions such as supplying different production lines or discharging defective fluids, etc.)

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fluid control interchange valve, comprising an external pilot structure (1), a first valve body (2) and a second valve body (3) being arranged below the external pilot structure (1), characterized in that: An upper crater assembly (4) is arranged between the first valve body (2) and the second valve body (3); a first cavity (5) is arranged in the first valve body (2); a second cavity (6) is arranged in the second valve body (3); a lower crater assembly (70) is arranged in the second cavity (6); a first channel mechanism (7) which can be connected to the second valve body (3) is arranged in the upper crater assembly (4); a second channel mechanism (8) which can be connected to the second valve body (3) is arranged in the lower crater assembly (70); a main interface (9) which can communicate with the second cavity (6) is arranged on the second valve body (3); the upper crater assembly (4) can move up and down and is provided with a piston rod sealing assembly (10) which can block the first channel mechanism (7) or the second channel mechanism (8); a control mechanism (11) for controlling the upper and lower positions of the piston rod sealing assembly (10) is arranged in the first valve body (2).

2. A fluid control interchange valve according to claim 1, characterized in that: The external pilot structure (1) comprises an upper component (101), and a terminal (102) is arranged on the upper component (101).

3. A fluid control exchange valve according to claim 2, characterized in that: The first channel mechanism (7) comprises a first vertical channel (701) arranged in the upper crater assembly (4), and the second valve body (3) is provided with a first interface (702) and a second interface (703) on the outside thereof which can communicate with the first vertical channel (701).

4. A fluid control interchange valve according to claim 3, characterized in that: The second channel mechanism (8) comprises a second vertical channel (801) arranged in the lower crater assembly (70), and the second valve body (3) is provided with a third interface (802) and a fourth interface (803) that can communicate with the second vertical channel (801) outside.

5. A fluid control exchange valve according to claim 4, characterized in that: The main interface (9) is arranged between the first channel mechanism (7) and the second channel mechanism (8).

6. A fluid control exchange valve according to claim 5, characterized in that: The piston rod sealing assembly (10) comprises a piston rod (1001) movably arranged in the first vertical channel (701), an inner groove (1002) is arranged in the middle of the piston rod (1001), the diameter of the inner groove (1002) is smaller than that of the first vertical channel (701), and a sealing structure (1003) for closing the upper crater assembly (4) or the lower crater assembly (70) is arranged at the lower end of the piston rod (1001).

7. A fluid control exchange valve according to claim 6, characterized in that: The control mechanism (11) comprises a first air port (111) and a second air port (112) which are arranged on both sides of the first valve body (2) and connected to the first cavity (5), and a spring seat (114) is arranged at the upper end of the piston rod (1001).

8. A fluid control exchange valve according to claim 7, characterized in that: The control mechanism (11) also includes a downward pressure spring (113) arranged on the upper surface of the spring seat (114) and the upper surface of the first valve body (2).

9. A fluid control exchange valve according to claim 7, characterized in that: The control mechanism (11) further comprises an upward pressure spring (115) arranged on the lower surface of the spring seat (114) and the upper surface of the upper crater assembly (4).

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