Nozzle core

Abstract

The utility model provides a nozzle core which comprises an outer shell, a yoke tube is arranged in the outer shell, a coil framework and a yoke piece are arranged outside the yoke tube, a coil is wound on the coil framework, a yoke shell is arranged outside the coil framework, and the yoke shell is connected with the outer shell. Sealing pieces are arranged at the two ends of the coil framework respectively; a rear pipe is arranged between the rear portion of the yoke pipe and the shell, a front pipe is arranged between the front portion of the yoke pipe and the coil framework, a valve rod is arranged in the front pipe, a valve seat is arranged at the end of the front pipe, and a steel ball is arranged between the valve rod and the valve seat. A spring is arranged in the yoke pipe and connected with the valve rod. Sealing pieces are arranged at the two ends of the coil framework respectively, so that the sealing performance of the coil working environment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of urea nozzles, in particular to a nozzle core. Background Art

[0002] Automotive urea (i.e. urea aqueous solution) is a colorless, transparent, clear liquid. It is sprayed into the exhaust pipe through the urea nozzle, and undergoes a redox reaction with nitrogen oxides in the exhaust pipe to generate pollution-free nitrogen and water for discharge.

[0003] At present, the opening and closing of the urea nozzle is controlled by a solenoid valve. The solenoid valve is composed of a yoke tube, a coil frame and a coil wound on the coil frame. The working environment of the solenoid valve is filled with urea aqueous solution, so higher requirements are placed on the sealing of the coil working environment. The sealing effect of the urea nozzle on the market is not very ideal at the coil. During use, some liquid will enter the coil, thereby reducing the service life of the coil and causing the urea nozzle to malfunction.

[0004] In addition, urea nozzles are prone to urea crystallization, which is also a problem that needs to be solved urgently. Utility Model Content

[0005] The utility model provides a nozzle core, which at least solves one of the above technical problems.

[0006] The specific technical scheme is as follows: a nozzle core comprises a shell, a yoke tube is arranged inside the shell, a coil frame and a yoke sheet are arranged outside the yoke tube, a coil is wound on the coil frame, a yoke shell is arranged outside the coil frame, and the yoke shell is connected to the shell;

[0007] Sealing members are respectively provided at both ends of the coil frame;

[0008] A rear tube is arranged between the rear part of the yoke tube and the shell, a front tube is arranged between the front part of the yoke tube and the coil frame, a valve stem is arranged in the front tube, a valve seat is arranged at the end of the front tube, and a steel ball is arranged between the valve stem and the valve seat;

[0009] A spring is arranged in the yoke tube, and the spring is connected to the valve stem.

[0010] Through the above technical solution, by respectively arranging sealing members at both ends of the coil frame, the sealing performance of the coil working environment is improved.

[0011] Preferably, the sealing member is an annular protrusion disposed at both ends of the coil skeleton.

[0012] Through the above technical solution, the difficulty of liquid penetrating into the coil through the gap between the yoke shell and the coil frame is improved, thereby improving the sealing of the coil working environment.

[0013] Preferably, two coaxially arranged annular protrusions are respectively provided at both ends of the coil skeleton.

[0014] Through the above technical solution, the difficulty of liquid penetrating into the coil through the gap between the yoke housing and the coil frame is further improved.

[0015] The cross section of the annular protrusion is an isosceles triangle, and the vertex angle of the triangle is 30°-45°.

[0016] Through the above technical solution, the sealing effect of the annular protrusion is improved.

[0017] Preferably, a nozzle head is provided at the end of the front pipe, and a spray hole is formed on the nozzle head.

[0018] Through the above technical solution, the nozzle head has a simple structure and stable operation.

[0019] Preferably, a circular through hole and a circular groove are respectively provided on the valve seat, the diameter of the circular groove is larger than the diameter of the circular through hole, and a rotating guide vane is installed between the valve seat and the nozzle head, and the rotating guide vane is used to make the urea passing through the rotating guide vane spiral.

[0020] Through the above technical solution, the urea passing through the rotating guide vane is sprayed out in a spiral shape, which effectively reduces the crystallization phenomenon of urea.

[0021] Preferably, the rotating guide vane is provided with a plurality of through holes and a plurality of channels, the through holes are arranged in a ring shape, the number of the channels is the same as the number of the through holes, the channels are arranged in rotational symmetry, one end of each channel is connected to one of the through holes, and the other end is connected to the other channels at the center of the rotating guide vane, each channel is eccentrically arranged to the through hole, the through hole is connected to the circular groove, and the channel is connected to the spray hole at the center of the rotating guide vane.

[0022] Through the above technical solution, urea forms a vortex at the center after being arranged in rotational symmetry, and then is sprayed out from the spray hole, so that the dispersion effect of urea is better and the crystallization phenomenon of urea is reduced.

[0023] Preferably, the number of the through holes is 3 or 5.

[0024] Through the above technical solution, the effect of urea forming a vortex at the center is better.

[0025] The beneficial effects of the utility model are:

[0026] 1. Seals are provided at both ends of the coil frame, which improves the sealing effect of the coil frame and can effectively keep the working environment of the coil dry, thereby increasing the service life of the coil.

[0027] 2. Add a rotating guide vane to allow the urea to form a vortex at the nozzle, which can improve the dispersion effect of the urea after it is sprayed out and effectively reduce the crystallization of urea. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0029] Figure 1 It is a structural schematic diagram of Example 1;

[0030] Figure 2 for Figure 1 An enlarged schematic diagram of the middle nozzle head;

[0031] Figure 3 Coil skeleton Figure 1 ;

[0032] Figure 4 Coil skeleton Figure 2 ;

[0033] Figure 5 This is a schematic diagram of the structure of the rotating guide vane in Example 1;

[0034] Figure 6 This is a stereoscopic diagram of the rotating guide blade of Example 1;

[0035] Figure 7 This is a schematic diagram of the structure of the rotating guide vane in Example 2;

[0036] 1. Shell, 2. Yoke tube, 3. Coil frame, 4. Yoke shell, 5. Rear tube, 6. Front tube, 61. Nozzle head, 611. Spray hole, 62. Rotating guide vane, 621. Through hole, 622. Channel, 7. Valve stem, 8. Valve seat, 81. Circular through hole, 82. Circular groove, 9. Steel ball, 10. Spring, 11. Yoke. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the drawings of the specification. In the following description, many specific details are set forth to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0039] Example 1

[0040] like Figure 1-2 As shown, a nozzle core comprises a housing 1, in which a yoke tube 2 is arranged. A coil frame 3 and a yoke sheet 11 are arranged outside the yoke tube 2, and a coil is wound on the coil frame 3. A yoke housing 4 is arranged outside the coil frame 3. The yoke housing 4 is connected to the housing 1.

[0041] like Figure 1-4 As shown, seals are provided at both ends of the coil skeleton 3. The seals are annular protrusions 31 provided at both ends of the coil skeleton 3. The cross-section of the annular protrusion 31 is an isosceles triangle, and the vertex angle of the triangle is 30°-45°. Two coaxially arranged annular protrusions 31 are provided at both ends of the coil skeleton 3. Plastic wrap is provided outside the coil and the coil skeleton 3. Specifically, heat shrinkable plastic is wrapped around the coil skeleton 3 and the outside of the coil, and the plastic is shrunk and tightly wrapped around the coil skeleton 3 and the coil by heating. By providing seals at both ends of the coil skeleton, the sealing of the coil working environment is improved.

[0042] like Figure 1 As shown, a rear tube 5 is provided between the rear part of the yoke tube 2 and the housing 1. A front tube 6 is provided between the front part of the yoke tube 2 and the coil frame 3. A valve stem 7 is provided in the front tube 6. A valve seat 8 is provided at the end of the front tube 6. A steel ball 9 is provided between the valve stem 7 and the valve seat 8. The energized state of the coil is used to control the extension and contraction of the valve stem 7, and the valve stem 7, the valve seat 8 and the steel ball 9 cooperate to realize the opening and closing of the urea nozzle.

[0043] like Figure 1 As shown, a spring 10 is arranged in the yoke tube 2, and the spring 10 is connected to the valve stem 7. The spring 10 is used for resetting the valve stem 7.

[0044] like Figure 2 As shown, a nozzle head 61 is provided at the end of the front pipe 6, and a spray hole 611 is provided on the nozzle head 61. The spray hole is used to spray urea.

[0045] like Figure 2 , 56, the valve seat 8 is respectively provided with a circular through hole 81 and a circular groove 82, the diameter of the circular groove 82 is larger than the diameter of the circular through hole 81, and a rotating guide vane 62 is installed between the valve seat 8 and the nozzle head 61. The rotating guide vane 62 is provided with a plurality of through holes 621 and a plurality of channels 622, the through holes 621 are arranged in an annular manner, the number of channels 622 is the same as the number of through holes 621, and the channels 622 are arranged in rotational symmetry, one end of each channel 622 is connected to one of the through holes 621, and the other end is connected to other channels 622 at the center of the rotating guide vane 62, each channel 622 is eccentrically arranged with the through hole 621, the through hole 621 is connected to the circular groove 82, and the channel 622 is connected to the spray hole 611 at the center of the rotating guide vane 62.

[0046] After the urea is arranged in rotational symmetry, a vortex is formed at the center and then sprayed out from the nozzle, which makes the urea more dispersed and reduces the crystallization of urea.

[0047] Example 2

[0048] like Figure 7 As shown, the number of through holes 621 provided on the rotating guide vane 62 is 5, and the rest is the same as in the first embodiment.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A nozzle core, characterized in that: It comprises a shell (1), a yoke tube (2) is arranged inside the shell, a coil frame (3) and a yoke sheet (11) are arranged outside the yoke tube (2), a coil is wound around the coil frame (3), a yoke shell (4) is arranged outside the coil frame (3), and the yoke shell (4) is connected to the shell (1); Sealing parts are respectively provided at both ends of the coil frame (3); A rear tube (5) is arranged between the rear part of the yoke tube (2) and the housing (1), a front tube (6) is arranged between the front part of the yoke tube (2) and the coil frame (3), a valve stem (7) is arranged inside the front tube (6), a valve seat (8) is arranged at the end of the front tube (6), and a steel ball (9) is arranged between the valve stem (7) and the valve seat (8); A spring (10) is arranged inside the yoke tube (2), and the spring (10) is connected to the valve stem (7).

2. A nozzle core according to claim 1, characterized in that: The sealing member is an annular protrusion (31) arranged at both ends of the coil frame (3).

3. A nozzle core according to claim 2, characterized in that: The cross section of the annular protrusion (31) is an isosceles triangle, and the vertex angle of the triangle is 30°-45°.

4. A nozzle core according to claim 3, characterized in that: Two coaxially arranged annular protrusions (31) are respectively arranged at both ends of the coil frame (3).

5. The nozzle core according to claim 1, characterized in that: A nozzle head (61) is provided at the end of the front tube (6), and a spray hole (611) is provided on the nozzle head (61).

6. A nozzle core according to claim 5, characterized in that: The valve seat (8) is provided with a circular through hole (81) and a circular groove (82), respectively. The diameter of the circular groove (82) is larger than the diameter of the circular through hole (81). A rotating guide vane (62) is installed between the valve seat (8) and the nozzle head (61). The rotating guide vane (62) is used to make the urea passing through the rotating guide vane (62) present a spiral shape.

7. A nozzle core according to claim 6, characterized in that: The rotating guide vane (62) is provided with a plurality of through holes (621) and a plurality of channels (622); the through holes (621) are arranged in a ring shape; the number of the channels (622) is the same as the number of the through holes (621); the channels (622) are arranged in a rotationally symmetrical manner; one end of each channel (622) is connected to one of the through holes (621); the other end is connected to the other channels (622) at the center of the rotating guide vane (62); each channel (622) is eccentrically arranged to the through hole (621); the through hole (621) is connected to the circular groove (82); and the channel (622) is connected to the spray hole (611) at the center of the rotating guide vane (62).

8. The nozzle core according to claim 7, characterized in that: The number of the through holes (621) is 3 or 5.

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