Low-temperature electromagnetic valve

Abstract

The low-temperature electromagnetic valve comprises a valve body, an inlet is formed in one end of the valve body, an outlet is formed in the other end of the valve body, the outlet is located on the upper side of the inlet, a communicating hole is formed between the inlet and the outlet, a main valve assembly is arranged in the inlet on the lower side of the communicating hole, and an electromagnetic valve element assembly is arranged in the outlet on the upper side of the communicating hole. The electromagnetic valve element assembly comprises an electromagnet assembly and an armature, a compression spring is arranged between the electromagnet assembly and the armature, a valve rod is arranged between the armature and the main valve assembly, the lower end of the valve rod is connected with the main valve assembly, a vertical through hole is formed in the valve rod and communicated with a pressure relief hole of the main valve assembly, and the upper end of the valve rod abuts against the armature in a sealed mode. According to the utility model, the size of the whole electromagnetic valve is reduced, and the power required by the opening of the electromagnetic valve and the coil is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a low-temperature electromagnetic valve. Background Art

[0002] The existing cryogenic solenoid valve mainly drives the armature to move by energizing the electromagnet assembly, and then the armature drives the valve core to move, so that the inlet and outlet are connected, the inlet and outlet are on the same axis, and the electromagnet assembly and the valve core are located on the same side of the axis, such as patent document CN219570862U. This type of cryogenic solenoid valve has the following problems: 1. The armature drives the valve core to move together, and the power of the solenoid valve coil required is relatively high; 2. The electromagnet assembly and the valve core are located on the same side of the axis, resulting in a larger overall volume of the solenoid valve. Utility Model Content

[0003] The utility model provides a low-temperature electromagnetic valve, which reduces the size of the entire electromagnetic valve and reduces the power required by the coil when the electromagnetic valve is opened.

[0004] The technical solution of the utility model is achieved as follows: a low-temperature solenoid valve comprises a valve body, one end of the valve body is provided with an inlet, the other end is provided with an outlet, the outlet is located on the upper side of the inlet, a connecting hole is provided between the inlet and the outlet, a main valve assembly is provided in the inlet on the lower side of the connecting hole, a solenoid valve core assembly is provided in the outlet on the upper side of the connecting hole, the solenoid valve core assembly comprises an electromagnet assembly and an armature, a compression spring is provided between the electromagnet assembly and the armature, a valve stem is provided between the armature and the main valve assembly, the lower end of the valve stem is connected to the main valve assembly, a vertical through hole is provided in the valve stem, the vertical through hole is communicated with the pressure relief hole of the main valve assembly, and the upper end of the valve stem is sealed against the armature.

[0005] Furthermore, the main valve assembly includes a vertically sliding I-shaped valve, a pilot chamber is provided at the lower end of the I-shaped valve, a support spring is provided in the pilot chamber, the pilot chamber is communicated with the inlet through a pilot gap, a pressure relief hole is provided at the upper end of the pilot chamber, the upper end of the I-shaped valve is sealed against the connecting hole, and the lower end of the valve stem is sealed in connection with the pressure relief hole.

[0006] Furthermore, an active cavity is provided at the lower side of the electromagnet assembly, a vertically sliding armature is provided in the active cavity, a compression spring is located in the active cavity between the electromagnet assembly and the armature, a third sealing gasket is fixed to the lower end of the armature, and the upper end of the valve stem abuts against the third sealing gasket.

[0007] Furthermore, a vertical slide groove is provided on the valve body directly below the connecting hole, a removable blocking plate is provided at the lower end of the vertical slide groove, a first sealing gasket is provided between the blocking plate and the valve body, the lower end of the I-shaped valve is placed in the vertical slide groove, and the I-shaped valve and the blocking plate are connected by a supporting spring.

[0008] Furthermore, a T-shaped positioning groove is provided at the upper end of the I-shaped valve, a sealing ring is provided in the positioning groove, the outer side of the upper end of the sealing ring is sealed against the periphery of the connecting hole, a sealing groove is provided on the inner side of the upper end of the sealing ring, the lower end of the valve stem is fixed in the positioning groove, and a sealing plate cooperating with the sealing ring is also fixed on the valve stem.

[0009] Furthermore, an assembly groove is provided on the valve body directly above the communicating hole, the electromagnet assembly is placed in the assembly groove, a second sealing gasket is provided between the electromagnet assembly and the assembly groove, and a detachable pressing plate is provided at the upper end of the assembly groove.

[0010] Beneficial effects of the utility model:

[0011] The utility model arranges the main valve assembly in the inlet, and the electromagnetic valve core assembly on the outlet side, and is located at the upper and lower sides of the communicating hole, which is beneficial to reducing the size of the entire electromagnetic valve; through the compression spring, the armature and the valve stem seal are abutted against each other, thereby closing the pressure relief hole, and then the communicating hole is closed by the main valve assembly, and after the electromagnetic iron assembly is energized, it overcomes the action force of the compression spring, and only needs to drive the armature to move upward to open the vertical through hole, and then open the pressure relief hole, thereby reducing the power required for the coil to open the electromagnetic valve.

[0012] The main valve assembly of the utility model allows the inlet medium to enter the pilot cavity through the setting of the pilot gap, thereby pushing the I-shaped valve to move up to seal the connecting hole, and then cooperates with the electromagnetic valve core assembly to seal the pressure relief hole, so that the connecting hole is closed. This structure is suitable for low temperature environments and is not easy to leak. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 for Figure 1 A partial enlarged view of middle A.

[0016] Valve body 1, inlet 2, outlet 3, connecting hole 4, assembly groove 5, electromagnet assembly 6, second sealing gasket 7, pressure plate 8, compression spring 9, armature 10, third sealing gasket 11, vertical slide groove 12, blocking plate 13, first sealing gasket 14, I-shaped valve 15, pilot chamber 16, pilot gap 17, support spring 18, pressure relief hole 19, positioning groove 20, sealing ring 21, sealing groove 22, valve stem 23, sealing plate 24, vertical through hole 25. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] like Figure 1 As shown, a low-temperature solenoid valve includes a valve body 1, an inlet 2 is provided at one end of the valve body 1, and an outlet 3 is provided at the other end, the outlet 3 is located on the upper side of the inlet 2, a vertical connecting hole 4 is provided between the inlet 2 and the outlet 3, and an assembly groove 5 is provided on the valve body 1 just above the connecting hole 4, an electromagnet assembly 6 is installed in the assembly groove 5, a second sealing gasket 7 is installed between the electromagnet assembly 6 and the assembly groove 5, and a pressing plate 8 is fixed to the upper end of the assembly groove 5 by screws. The electromagnet assembly 6 belongs to the prior art, mainly including a shell, a stopper iron is fixed in the shell, a coil is fixed on the outer side of the stopper iron, a movable cavity is provided at the lower end of the stopper iron, a vertically sliding armature 10 is provided in the movable cavity, a compression spring 9 is provided between the stopper iron and the armature 10, and a third sealing gasket 11 is fixed to the lower end of the armature 10.

[0019] A vertical slide groove 12 is provided on the valve body 1 just below the connecting hole 4. A plugging plate 13 is fixed to the lower end of the vertical slide groove 12 by screws. A first sealing gasket 14 is installed between the plugging plate 13 and the valve body 1. The first sealing gasket 14 ensures the sealing of the plugging plate 13. A vertically sliding main valve assembly is provided between the plugging plate 13 and the connecting hole 4. The main valve assembly includes a vertically sliding I-shaped valve 15. The lower end of the I-shaped valve 15 is placed in the vertical slide groove 12. A pilot chamber 16 is also provided at the lower end of the I-shaped valve 15. The lower end of the pilot chamber 16 is open and communicates with the vertical slide groove 12. Figure 2 As shown, a pilot gap 17 is processed on the outer side of the lower end of the I-shaped valve 15, that is, the I-shaped valve 15 slides non-sealed along the vertical slide groove 12, and the pilot cavity 16 can communicate with the inlet 2 through the pilot gap 17. The pilot gap 17 can be a spiral groove or a vertical groove arranged along the circumference of the I-shaped valve 15, etc., as long as it does not affect the vertical sliding of the I-shaped valve, and at the same time makes the pilot cavity 16 and the inlet 2 communicate.

[0020] A support spring 18 is provided in the pilot chamber 16, and the I-shaped valve 15 and the blocking plate 13 are connected via the support spring 18. A vertical pressure relief hole 19 is provided at the upper end of the pilot chamber 16, and a T-shaped positioning groove 20 is provided at the upper end of the I-shaped valve 15. A sealing ring 21 is provided in the positioning groove 20, and the outer side of the upper end of the sealing ring 21 is sealed against the periphery of the communicating hole 4, and a sealing groove 22 is provided on the inner side of the upper end of the sealing ring 21.

[0021] A valve stem 23 is provided between the I-shaped valve 15 and the armature 10. The upper end of the valve stem 23 passes through the valve body 1 and abuts against the third sealing gasket 11, that is, the upper end of the valve stem 23 seals against the armature 10. The lower end of the valve stem 23 is fixed in the positioning groove 20, and the fixing method can be threaded fixing or interference fixing. A sealing plate 24 that cooperates with the sealing ring 21 is also fixed on the valve stem 23, so that the lower end of the valve stem 23 is sealed and connected with the pressure relief hole 19. A vertical through hole 25 is provided in the valve stem 23, and the vertical through hole 25 communicates with the pressure relief hole 19.

[0022] The method of using the low-temperature solenoid valve is as follows: when the electromagnet assembly is not energized, the compression spring 9 pushes the armature 10 downward, the armature 10 and the upper end of the valve stem 23 are sealed against each other, and the upper end of the vertical through hole 25 is closed; the low-temperature medium enters through the inlet 2, and then enters the pilot chamber 16 through the pilot gap 17, pushing the I-shaped valve 15 upward, so that the upper end of the I-shaped valve 15 and the peripheral seal of the connecting hole 4 are against each other, and the connecting hole 4 is closed; after the electromagnet assembly is energized, the armature 10 moves upward, the vertical through hole 25 and the pressure relief hole 19 are opened, and the gas in the pilot chamber 16 enters the outlet 3 through the pressure relief hole 19 and the vertical through hole 25, the I-shaped valve 15 moves downward, and the connecting hole 4 is opened.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cryogenic solenoid valve, comprising a valve body, one end of the valve body being provided with an inlet, and the other end being provided with an outlet, characterized in that: The outlet is located on the upper side of the inlet, a connecting hole is arranged between the inlet and the outlet, a main valve assembly is arranged in the inlet on the lower side of the connecting hole, and an electromagnetic valve core assembly is arranged in the outlet on the upper side of the connecting hole. The electromagnetic valve core assembly includes an electromagnet assembly and an armature, a compression spring is arranged between the electromagnet assembly and the armature, a valve stem is arranged between the armature and the main valve assembly, the lower end of the valve stem is connected to the main valve assembly, a vertical through hole is arranged in the valve stem, the vertical through hole is communicated with the pressure relief hole of the main valve assembly, and the upper end of the valve stem is sealed against the armature.

2. A cryogenic solenoid valve according to claim 1, characterized in that: The main valve assembly includes a vertically sliding I-shaped valve, a pilot chamber is provided at the lower end of the I-shaped valve, a supporting spring is provided in the pilot chamber, the pilot chamber is communicated with the inlet through a pilot gap, a pressure relief hole is provided at the upper end of the pilot chamber, the upper end of the I-shaped valve is sealed against the connecting hole, and the lower end of the valve stem is sealed in connection with the pressure relief hole.

3. A cryogenic solenoid valve according to claim 1 or 2, characterized in that: An active cavity is provided at the lower side of the electromagnet assembly, in which a vertically sliding armature is provided, a compression spring is located in the active cavity between the electromagnet assembly and the armature, a third sealing gasket is fixed at the lower end of the armature, and the upper end of the valve stem abuts against the third sealing gasket.

4. A cryogenic solenoid valve according to claim 2, characterized in that: A vertical slide groove is arranged on the valve body directly below the connecting hole, a removable plugging plate is arranged at the lower end of the vertical slide groove, a first sealing gasket is arranged between the plugging plate and the valve body, the lower end of the I-shaped valve is placed in the vertical slide groove, and the I-shaped valve and the plugging plate are connected by a supporting spring.

5. A cryogenic solenoid valve according to claim 2 or 4, characterized in that: A T-shaped positioning groove is provided at the upper end of the I-shaped valve, a sealing ring is provided in the positioning groove, the outer side of the upper end of the sealing ring is sealed against the periphery of the connecting hole, a sealing groove is provided on the inner side of the upper end of the sealing ring, the lower end of the valve stem is fixed in the positioning groove, and a sealing plate matching the sealing ring is also fixed on the valve stem.

6. A cryogenic solenoid valve according to claim 1, characterized in that: An assembly groove is arranged on the valve body just above the communicating hole, the electromagnet assembly is placed in the assembly groove, a second sealing gasket is arranged between the electromagnet assembly and the assembly groove, and a detachable pressing plate is arranged at the upper end of the assembly groove.

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