Proportional flow control valve

Abstract

The utility model discloses a proportional flow control valve, which relates to the technical field of valves and is characterized by comprising an iron casing, an upper socket arranged at the upper end of the iron casing and a lower connecting pipe arranged at the lower end of the iron casing; the coil component is inserted into the iron shell from top to bottom along the upper socket; the movable iron core is inserted into the bottom of the coil component from bottom to top along the lower connecting pipe; the valve body is inserted into the bottom of the coil component from bottom to top along the lower connecting pipe and located on the lower side of the movable iron core, and an upper inlet hole and a lower outlet hole are formed in the side wall of the periphery of the valve body; the conductor connecting piece is matched with the bottom of the movable iron core; the valve element is inserted into the valve body, the upper end of the valve element is used for being connected with the conductor connecting piece in a matched mode, and an upper matching hole and a lower matching hole are formed in the peripheral side wall of the valve element; the spring unit is fixed to the inner side of the bottom of the valve seat, and the upper end of the spring unit abuts against the valve element. The sealing structure has the effects of being convenient to install and improving the sealing stability.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more specifically to a proportional flow control valve. Background Art

[0002] The proportional flow control valve is a manual adjustment device that uses a proportional solenoid to replace the throttle valve or speed control valve. It inputs an electrical signal to change the opening of the throttle valve, thereby adjusting the flow of the system.

[0003] The Chinese patent application document with the publication number CN1436932A discloses a capacity control valve, which includes: a coil component, a moving iron core, a housing, a return spring, a fixed iron core, a push rod, a valve body, a coupling sleeve, a valve core, a flange and a pressure-sensitive element. Among them: the moving iron core and the push rod are assembled into a moving iron core assembly through interference fit, the coupling sleeve, the valve core and the flange are assembled into a valve core assembly through interference fit, and then the push rod and the coupling sleeve are also connected to the moving iron core assembly and the valve core assembly through interference fit, the return spring is arranged between the moving and fixed iron cores, and under the action of electromagnetic force, the push rod drives the valve core to produce the action of opening and closing the valve port.

[0004] However, the capacity control valve has the problem of great difficulty in installation and poor connection sealing effect, and thus it is difficult to achieve high-precision control standards during proportional flow control, thus affecting the practical effect and needs to be improved. Summary of the invention

[0005] In view of this, the purpose of this application is to provide a proportional flow control valve to achieve the purpose of convenient installation and improved sealing stability. The specific scheme is as follows:

[0006] A proportional flow control valve, comprising:

[0007] An iron shell, wherein an upper socket is provided at the upper end of the iron shell, and a lower connecting pipe is provided at the lower end;

[0008] A coil component, wherein the coil component is inserted into the iron shell from top to bottom along the upper socket;

[0009] A moving iron core, the moving iron core is inserted into the bottom of the coil component from bottom to top along the lower connecting pipe;

[0010] A valve body, the valve body is inserted into the bottom of the coil component from bottom to top along the lower connecting pipe and is located at the lower side of the moving iron core, and the outer peripheral side wall of the valve body is provided with an upper inlet hole and a lower outlet hole;

[0011] A conductor connector, the conductor connector matches the bottom of the moving iron core;

[0012] A valve core, the valve core is inserted into the valve body, and the upper end of the valve core is used for matching and connecting with the conductor connector, and the outer peripheral side wall is provided with a matching upper hole and a matching lower hole;

[0013] A spring unit is fixed on the inner side of the bottom of the valve body, and an upper end of the spring unit abuts against the valve core.

[0014] Preferably: the outer diameters of the upper and lower ends of the valve core are smaller than the outer diameter of the middle portion, and the matching upper hole is located at the upper end of the valve core, and the matching lower hole is located at the middle portion of the valve core.

[0015] Preferably, the spring unit comprises a spring seat fixed in the valve body and an abutment spring whose lower end is inserted into the spring seat; the spring seat has a U-shaped cross section along the axial direction, and the upper end of the abutment spring abuts against the valve core.

[0016] Preferably: a guide sleeve is inserted into the bottom of the coil component, and the moving iron core is inserted into the guide sleeve; and a magnetic isolation sleeve is sleeved on the outer side of the guide sleeve.

[0017] Preferably: the upper end of the valve body is grooved and plug-connected with the moving iron core; the upper end of the conductor connector is plugged into the inner side of the bottom of the moving iron core, and the lower end is used to be inserted into the valve seat and abut against the top end of the valve core.

[0018] Preferably: a shell sealing ring located on the outside of the lower connecting pipe is provided at the bottom of the iron shell; a coil sealing ring abutting against the inner wall of the iron shell is provided on the outside of the coil component; and two inlet and outlet sealing rings abutting against the inner side of the lower connecting pipe and the external connecting pipe are provided on the outside of the valve body.

[0019] It can be seen from the above scheme that the present application provides a proportional flow control valve, which has the following beneficial effects: an iron shell, a coil component, a moving iron core, a valve body, a conductor connector, a valve core and a spring unit form a linkage matching structure, so that the spring unit supports the valve core while cooperating with the coil component to achieve the purpose of driving the valve core to move and adjust the flow, and the upper and lower matching connection structures are stable, thereby significantly reducing the difficulty of installation while improving the overall sealing performance of the proportional flow control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of this embodiment.

[0021] Explanation of the reference numerals in the accompanying drawings: 1. Iron shell; 11. Upper socket; 12. Lower connecting pipe; 13. Shell sealing ring; 2. Coil component; 21. Coil sealing ring; 3. Moving iron core; 31. Guide sleeve; 32. Magnetic isolation sleeve; 4. Conductor connector; 5. Valve core; 51. Matching upper hole; 52. Matching lower hole; 6. Valve body; 61. Upper inlet hole; 62. Lower outlet hole; 63. Inlet and outlet sealing rings; 7. Spring seat; 71. Abutment spring. DETAILED DESCRIPTION

[0022] In order to make the technical solution and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0023] like Figure 1 As shown, a proportional flow control valve comprises an iron shell 1, a coil component 2, a moving iron core 3, a valve body 6, a conductor connector 4, a valve core 5 and a spring unit. Among them, an upper socket 11 is provided at the upper end of the iron shell 1, and a lower pipe 12 is provided at the lower end. The coil component 2 is inserted into the iron shell 1 from top to bottom along the upper socket 11, so as to drive and control the moving iron core 3 to make reciprocating movements in the vertical direction, so as to achieve the purpose of proportional flow control when the valve core 5 and the valve body 6 are matched. The moving iron core 3 is inserted into the bottom of the coil component 2 from bottom to top along the lower pipe 12, which has the effect of reducing the difficulty of assembly and improving the stability of matching. The valve body 6 is inserted into the bottom of the coil component 2 from bottom to top along the lower pipe 12, and is located at the lower side of the moving iron core 3, and is coaxially arranged and distributed with the moving iron core 3 and the iron shell 1, so as to further reduce the difficulty of assembly. An upper inlet hole 61 and a lower outlet hole 62 are provided on the outer peripheral side wall of the valve body 6 to achieve the purpose of inlet and outlet flow. The conductor connector 4 matches the bottom of the moving iron core 3, thereby achieving the purpose of connecting with the moving iron core 3 and cooperating with the valve core 5 to achieve proportional flow control. The valve core 5 is inserted into the valve body 6, and the upper end is used to match and connect with the conductor connector 4, and a matching upper hole 51 and a matching lower hole 52 are provided on the outer peripheral side wall of the valve core 5. The matching upper hole 51 and the matching lower hole 52 are used to match with the upper inlet hole 61 and the lower outlet hole 62 to achieve the purpose of proportional flow control. The spring unit is fixed on the inner side of the bottom of the valve body 6, and the upper end is in contact with the valve core 5, which is used to apply an elastic restoring force to the valve core 5 to move upward, so that the valve core 5 applies pressure to the spring unit under the driving force of the coil component 2 so that the spring unit provides a corresponding linear movement space.

[0024] It should be noted that the outer diameters of the upper and lower ends of the valve core 5 are smaller than the outer diameter of the middle part, and the upper matching hole 51 is located at the upper end of the valve core 5, and the lower matching hole 52 is located at the middle part of the valve core 5. The spring unit includes a spring seat 7 fixed in the valve body 6 and an abutment spring 71 whose lower end is inserted in the spring seat 7. The cross section of the spring seat 7 along the axial direction is U-shaped, and the upper end of the abutment spring 71 abuts against the valve core 5, and the lower end has a high matching stability after being inserted in the U-shaped groove of the spring seat 7.

[0025] In order to further improve the moving stability of the moving iron core 3, a guide sleeve 31 is inserted at the bottom of the coil component 2, and the moving iron core 3 is inserted in the guide sleeve 31. At the same time, a magnetic isolation sleeve 32 is sleeved on the outer side of the guide sleeve 31.

[0026] like Figure 1 As shown, the upper end of the valve body 6 is slotted and plugged in with the moving iron core 3. The upper end of the conductor connector 4 is plugged into the inner side of the bottom of the moving iron core 3, and the lower end is used to be inserted into the valve seat and abut against the top of the valve core 5. Therefore, the two ends of the conductor connector 4 will form a stable matching connection structure with the corresponding valve core 5 and the moving iron core 3, thereby effectively avoiding the problem of decreased stability and difficulty in effective proportional flow control caused by relative movement offset. At the same time, a shell sealing ring 13 located on the outside of the lower connecting pipe 12 is provided at the bottom of the iron shell 1. A coil sealing ring 21 abutting against the inner side wall of the iron shell 1 is provided on the outside of the coil component 2. Two inlet and outlet sealing rings 63 are provided on the outside of the valve body 6, which are respectively abutted and sealed against the inner side of the lower connecting pipe 12 and the external pipe. Therefore, an effective sealing connection structure will be formed between the iron shell 1, the coil component 2 and the valve body 6, and when connected to an external pipeline to achieve proportional flow control, it will avoid the difficulty in achieving accurate proportional flow control due to leakage problems, thereby significantly improving the use stability of the proportional flow control valve.

[0027] In summary, the present application provides a proportional flow control valve, which comprises an iron shell 1, a coil component 2, a moving iron core 3, a valve body 6, a conductor connector 4, a valve core 5 and a spring unit to form a linkage matching structure, so that the spring unit supports the valve core 5 while cooperating with the coil component 2 to drive the valve core 5 to move and thus adjust the flow rate, and the upper and lower matching connection structures are stable, thereby significantly reducing the difficulty of installation and improving the overall sealing performance of the proportional flow control valve.

[0028] The "first", "second", "third", "fourth", etc. (if any) referred to in this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods or devices.

[0029] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0030] Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A proportional flow control valve, characterized in that: include: An iron shell (1), wherein an upper socket (11) is provided at the upper end of the iron shell (1), and a lower pipe (12) is provided at the lower end; A coil component (2), the coil component (2) being inserted into the iron shell (1) from top to bottom along the upper insertion opening (11); A moving iron core (3), the moving iron core (3) being inserted into the bottom of the coil component (2) from bottom to top along the lower connecting pipe (12); A valve body (6), the valve body (6) is inserted into the bottom of the coil component (2) from bottom to top along the lower connecting pipe (12) and is located at the lower side of the moving iron core (3), and the outer peripheral side wall of the valve body (6) is provided with an upper inlet hole (61) and a lower outlet hole (62); A conductor connector (4), the conductor connector (4) matches the bottom of the moving iron core (3); a valve core (5), the valve core (5) is inserted into the valve body (6), and the upper end of the valve core (5) is used to match and connect with the conductor connector (4), and the outer peripheral side wall is provided with a matching upper hole (51) and a matching lower hole (52); A spring unit is fixed on the inner side of the bottom of the valve body (6), and the upper end of the spring unit is in contact with the valve core (5).

2. A proportional flow control valve according to claim 1, characterized in that: The outer diameters of the upper and lower ends of the valve core (5) are both smaller than the outer diameter of the middle portion, and the matching upper hole (51) is located at the upper end of the valve core (5), and the matching lower hole (52) is located at the middle portion of the valve core (5).

3. A proportional flow control valve according to claim 1, characterized in that: The spring unit comprises a spring seat (7) fixed in the valve body (6) and an abutment spring (71) whose lower end is inserted in the spring seat (7); the spring seat (7) has a U-shaped cross-section along the axial direction, and the upper end of the abutment spring (71) abuts against the valve core (5).

4. A proportional flow control valve according to claim 1, characterized in that: A guide sleeve (31) is inserted into the bottom of the coil component (2), and the moving iron core (3) is inserted into the guide sleeve (31); a magnetic isolation sleeve (32) is sleeved on the outer side of the guide sleeve (31).

5. A proportional flow control valve according to claim 1, characterized in that: The upper end of the valve body (6) is slotted and plugged into the movable iron core (3); the upper end of the conductor connector (4) is plugged into the inner side of the bottom of the movable iron core (3), and the lower end is used to be inserted into the valve body (6) and abut against the top end of the valve core (5).

6. A proportional flow control valve according to claim 1, characterized in that: The bottom of the iron shell (1) is provided with a shell sealing ring (13) located on the outside of the lower connecting pipe (12); the outside of the coil component (2) is provided with a coil sealing ring (21) abutting against the inner wall of the iron shell (1); the outside of the valve body (6) is provided with two inlet and outlet sealing rings (63) abutting against the inner side of the lower connecting pipe (12) and abutting against the external pipe for sealing respectively.

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