Wire connection integrated urea metering valve

Abstract

The utility model relates to the field of metering valve, specifically disclose a wire connection integrated urea metering valve, include: the spray pipe subassembly, coil subassembly, water jacket subassembly, the sealing plate, the seal cover subassembly, the liquid inlet cap, the connecting wire and the connecting pipe cover, spray pipe subassembly and coil subassembly are all sleeved in the inner chamber of water jacket subassembly, can cool the whole structure of electromagnetic coil and spray pipe subassembly to improve the cooling performance of whole, and through setting up the connecting wire has realized the flexible connection of control circuit, can better adapt to a variety of installation space and still can avoid the failure rate produced by vibration, through sealing plate and seal cover subassembly have realized the complete sealing of inner chamber, can prevent coil subassembly and so on electrical element from the immersion and penetration of external water.

Description

Technical Field

[0001] This utility model belongs to the field of metering valves, and specifically relates to a urea metering valve with integrated wire connection. Background Technology

[0002] Urea metering valves are pipe components in diesel engine aftertreatment systems. Their working environment is usually high temperature or extremely cold, and they are often exposed to external water such as rainwater or condensate during operation. Therefore, they have high requirements for heat dissipation and sealing performance.

[0003] The water jacket of existing urea injection metering valves is usually installed on the outer periphery of the coil assembly. It can only cool the circumference of the coil, which has a limited cooling range and poor effect. In addition, its wiring method usually adopts the side-fixed plastic shell connector wiring method, which not only occupies a large wiring space, but also the extended fixed connector will vibrate during use. In addition, due to the different thermal expansion coefficients of the materials, a large gap will be formed at the connection between the connector shell and the metal shell after heating, which will cause external water to seep into the coil part, thus affecting the overall sealing performance.

[0004] In addition, when existing urea injectors are used in sub-zero cold climates, the urea inside the inlet pipes is easily frozen because they are close to the external environment. Although the urea in the urea tank and the circulating water in the water jacket can be heated before use to thaw them, the connection point of the nozzle near the inlet pipe is far from the water jacket and is at the end of the urea supply line. This not only greatly reduces the thawing efficiency, but also causes cracking and deformation of the seals and pipe body after rapid cooling and heating. Furthermore, it can introduce incompletely thawed crystal particles, affecting the overall sealing performance and easily causing blockages, thus reducing the lifespan of the injector.

[0005] Patent document with application number "CN2024213308857" discloses a metering valve comprising a metering valve body and a connector wire. The connecting pin of the metering valve body is connected to the connecting wire of the connector wire and then encased in a protective sleeve of the metering valve body. The protective sleeve also covers part of the insulating sleeve of the connector. While the integrated metering valve design in this prior art appears to employ a single, integrated structure, it still relies on the connecting pin of the metering valve body to connect to the connector wire. Furthermore, it only externally encases the connection point with a protective sleeve, thus addressing the wear issue between the connector wire and the connecting pin. This approach fails to fundamentally solve the problem of poor sealing and easy water leakage at the assembly gap caused by vibration and differences in thermal expansion coefficients at the fixed connector on the metering valve body during use. It also does not address the issue of the nozzle inlet freezing easily in cold weather, affecting sealing and service life.

[0006] The above background information is provided only to assist in understanding the utility model concept and technical solution of this utility model, and it does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0007] The purpose of this utility model is to provide an integrated urea metering valve with wire connection, thereby overcoming the defects of existing urea metering valves, such as poor cooling effect of the water jacket and difficulty in ensuring the sealing performance of the valve body under working environments such as cold, hot, and vibration, and easy water leakage.

[0008] To achieve the above objectives, this utility model provides an integrated urea metering valve with wire connection, including a nozzle assembly, a coil assembly, and a water jacket assembly. The water jacket assembly has an inner cavity and a water cavity, with the water cavity covering the outer periphery and lower part of the inner cavity. The nozzle assembly and the coil assembly are installed inside the inner cavity, with the coil assembly fitted around the outer periphery of the nozzle assembly. A sealing plate is provided at the top of the inner cavity, and a sealing sleeve assembly and a liquid inlet cap are provided on the sealing plate. A connecting tube sleeve is provided between the sealing plate and the nozzle assembly, and the liquid inlet cap communicates with the connecting tube sleeve. A connecting wire is provided in the inner cavity, with one end of the connecting wire connected to the coil assembly, and the other end of the connecting wire passing through the sealing sleeve assembly and extending to the outside of the water jacket assembly, where a connector is provided.

[0009] Preferably, in the above technical solution, the top and bottom of the sealing plate are respectively provided with a first mounting groove and a second mounting groove, the sealing plate is provided with a first through hole, the two ends of the first through hole are respectively connected to the bottom of the first mounting groove and the bottom of the second mounting groove, the bottom of the liquid inlet cap is installed in the first mounting groove, one end of the connecting sleeve is fitted in the second mounting groove and a first sealing ring is provided on the outside, and the other end of the connecting sleeve is sleeved with the top of the nozzle assembly.

[0010] Preferably, in the above technical solution, the top of the sealing plate is provided with a third mounting groove, the bottom of the third mounting groove is provided with a second through hole, the second through hole penetrates the bottom of the third mounting groove and the bottom of the sealing plate, the sealing sleeve assembly is installed in the third mounting groove, and the connecting wire can pass through the second through hole.

[0011] Preferably, in the above technical solution, the axis of the first mounting groove is offset from the axis of the second mounting groove, and the axis of the first mounting groove is far from the axis of the third mounting groove.

[0012] Preferably, in the above technical solution, the diameter of the inner wall of the connecting sleeve gradually decreases from its top end to its bottom end.

[0013] Preferably, in the above technical solution, the water jacket assembly includes an outer sleeve and an inner sleeve. The top of the outer sleeve has a first opening, and the bottom of the outer sleeve has a first inverted cone portion and a second opening. The inner cavity is located within the inner sleeve. The top of the inner sleeve has a third opening communicating with the inner cavity, and the bottom of the inner sleeve has a second inverted cone portion and a fourth opening communicating with the inner cavity. The bottom end of the nozzle assembly is fitted into the fourth opening. The outer periphery of the top of the inner sleeve has an upwardly bent first flange that can fit into the first opening. The bottom of the inner sleeve can fit into the second opening. The sealing plate is fitted into the first opening, and the edge of the first flange abuts against the bottom of the sealing plate. The area between the first and second inverted cone portions and the area between the inner sleeve and the outer sleeve together constitute the water cavity.

[0014] Preferably, in the above technical solution, the sealing sleeve assembly includes a second sealing ring and a cover plate, the diameter of the second through hole is smaller than the diameter of the third mounting groove, the second sealing ring is installed in the third mounting groove and the bottom of the second sealing ring abuts against the bottom of the third mounting groove, the cover plate is installed at the opening of the third mounting groove, and the connecting wire can pass through the second sealing ring.

[0015] Preferably, in the above technical solution, the outer periphery of the opening of the third mounting groove is provided with a ring sleeve, the top of the ring sleeve is provided with a second flange, and the second flange extends outward from the ring sleeve; the bottom of the cover plate is provided with a snap-fit ​​edge, which can be snapped with the second flange; the top of the cover plate is provided with a sleeve, and the connecting wire can pass through the sleeve.

[0016] Preferably, in the above technical solution, the sealing sleeve assembly further includes a third sealing ring, which is installed between the cover plate and the ring sleeve. The bottom of the third sealing ring is provided with a boss, which can extend into the third mounting groove and abut against the top of the second sealing ring. The connecting wire can pass through the third sealing ring.

[0017] Preferably, in the above technical solution, the top of the third sealing ring is provided with a sleeve, the sleeve can pass through the sleeve and extend outward, and the connecting line can pass through the sleeve.

[0018] Compared with existing technologies, this utility model has the following beneficial effects: 1. The integrated urea metering valve with wire connection in this utility model cools the entire structure of the electromagnetic coil and nozzle assembly by fitting the nozzle assembly, coil assembly, and connecting sleeve into the inner cavity of the water jacket assembly. Furthermore, the connector is introduced to the outside of the valve body via a connecting wire, and the valve body is completely sealed by the sealing plate and sealing sleeve assembly. This eliminates the impact of vibration and thermal expansion on the sealing performance of fixed connectors in high-temperature and low-temperature environments. Additionally, the connecting sleeve allows the water jacket assembly to insulate and preheat the urea before it enters the nozzle assembly, preventing crystallization in cold environments and ensuring a good seal and service life.

[0019] 2. In this utility model, the positions of the first mounting groove and the second mounting groove are staggered, and the first through hole is an oblique hole structure, so that a larger space can be reserved for the third mounting groove without changing the overall installation space of the valve body, so that a larger sealing sleeve assembly can be installed, thereby enabling the sealing sleeve assembly to have better sealing performance.

[0020] 3. The water jacket in this utility model is composed of an inner sleeve and an outer sleeve. The bottom of the outer sleeve and the inner sleeve are respectively provided with a first inverted cone and a second inverted cone. The two can serve as guides when the bottom of the inner sleeve and the bottom of the nozzle assembly are assembled. Moreover, the inward structure of the two can extend the water cavity to the bottom of the coil assembly to form a semi-enclosed water cavity, thereby isolating the heat source from conducting heat to the bottom of the coil assembly. This improves the heat insulation and heat dissipation effect of the water jacket assembly. Similarly, in cold weather, the semi-enclosed water cavity can also keep the inner cavity warm and rapidly heat up the circulating water.

[0021] 4. The sealing sleeve assembly of this utility model is provided with a cover plate, and a ring with a flange is provided on the outer periphery of the third mounting groove. The cover plate can be interlocked with the flange, and the second sealing ring and the third sealing ring can be squeezed during the installation of the cover plate. The boss provided at the bottom of the third sealing ring can expand radially to seal the side wall of the third mounting groove through elastic deformation, and can also squeeze the second sealing ring axially to achieve axial sealing, thereby improving the overall sealing performance of the sealing sleeve assembly. Furthermore, a sleeve is provided on the top of the third sealing ring, which can cover the exposed part of the connecting wire, making its sealing area larger and also protecting the surface of the connecting wire.

[0022] 5. In this utility model, the connecting sleeve is entirely located within the water cavity. When starting in extremely cold conditions, it can be heated by the circulating water in the water cavity, thereby increasing the thawing speed of the liquid cap and the frozen urea in the connecting sleeve. The water cavity also serves as a heat preservation function to prevent the nozzle assembly and related sealing components from being damaged by freezing in excessively low temperatures. The diameter of the inner wall of the connecting sleeve gradually decreases from its top to its bottom to form a contraction structure, which can increase the liquid flow rate, improve the spraying and atomization effects of the nozzle assembly, and also prevent urea crystals from clogging the nozzle assembly to a certain extent.

[0023] 6. The first flange of the inner sleeve in this utility model not only plays a role in centering and guiding during the assembly of the inner sleeve, but also increases the contact area between the inner sleeve and the outer sleeve to improve the sealing effect. Moreover, when the sealing plate is assembled, the edge of the first flange can also abut against the bottom of the sealing plate to limit the sealing plate. Attached Figure Description

[0024] Figure 1 This is a structural diagram of the integrated urea metering valve with wire connection of this utility model.

[0025] Figure 2 This is a structural diagram of the sealing plate.

[0026] Figure 3 This is a structural diagram of the sealing sleeve assembly.

[0027] Figure 4 This is a structural diagram of the water jacket assembly.

[0028] Explanation of key figure labels: 100 - Nozzle assembly; 200-coil assembly; 300-Water jacket assembly, 310-Inner cavity, 320-Water cavity, 330-Outer sleeve, 331-First sleeve opening, 332-First inverted cone, 333-Second sleeve opening, 340-Inner sleeve, 341-Third sleeve opening, 342-Second inverted cone, 343-Fourth sleeve opening, 350-First flange; 400-Sealing plate, 410-First mounting slot, 420-Second mounting slot, 430-First through hole, 440-Third mounting slot, 450-Second through hole, 460-Ring sleeve, 461-Second flange; 500-Sealing sleeve assembly, 510-Second sealing ring, 520-Cover plate, 521-Embedded edge, 522-Sleeve, 530-Third sealing ring, 531-Boss, 532-Sleeve; 600-Inlet Cap; 700-Connecting cable; 800 - Connecting sleeve, 810 - Sealing ring groove, 820 - First sealing ring. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. Where the terms "first," "second," and "third" are used for descriptive purposes and to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the sequential relationship between indicated technical features.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0033] like Figures 1 to 4As shown, the integrated urea metering valve with wire connection in this embodiment includes: a nozzle assembly 100, a coil assembly 200, a water jacket assembly 300, an inner cavity 310, a water cavity 320, an outer sleeve 330, a first sleeve opening 331, a first inverted cone portion 332, a second sleeve opening 333, an inner sleeve 340, a third sleeve opening 341, a second inverted cone portion 342, a fourth sleeve opening 343, a first flange 350, a sealing plate 400, a first mounting groove 410, and a second... Mounting groove 420, first through hole 430, third mounting groove 440, second through hole 450, ring 460, second flange 461, sealing sleeve assembly 500, second sealing ring 510, cover plate 520, snap edge 521, sleeve 522, third sealing ring 530, boss 531, sleeve 532, liquid inlet cap 600, connecting wire 700, connector 710, connecting tube sleeve 800, sealing ring groove 810, first sealing ring 820.

[0034] The water jacket assembly has an inner cavity 310 and a water cavity 320. The water cavity 320 covers the outer periphery and lower part of the inner cavity 310. The nozzle assembly 100 and the coil assembly 200 are installed inside the inner cavity 310. The coil assembly 200 is fitted around the outer periphery of the nozzle assembly 100. A sealing plate 400 is installed on the top of the inner cavity 310. A sealing sleeve assembly 500 and a liquid inlet cap 600 are installed on the sealing plate 400. A connecting pipe sleeve 800 is installed between the sealing plate 400 and the nozzle assembly 100. The liquid inlet cap 600 is connected to the connecting pipe sleeve 800. A connecting wire 700 is provided in the inner cavity 310. One end of the connecting wire 700 is connected to the coil assembly 200. The other end of the connecting wire 700 passes through the sealing sleeve assembly 500 and extends to the outside of the water jacket assembly 300 and is provided with a connector.

[0035] More specifically, the water jacket assembly 300 includes an outer sleeve 330 and an inner sleeve 340. The top of the outer sleeve 330 has a first opening 331, and the bottom of the outer sleeve 330 has a first inverted cone portion 332. The middle portion of the first inverted cone portion 332 extends downward from the bottom of the outer sleeve 330 and has a second opening 333. The inner cavity 310 is disposed within the inner sleeve 340 and penetrates the top and bottom of the inner sleeve 340. The top of the inner sleeve 340 has a third opening 341 communicating with the inner cavity 310. The bottom of the inner sleeve 340 has a second inverted cone portion 342. The middle portion of the second inverted cone portion 342 extends downward from the bottom of the inner sleeve 340 and has an opening 333 communicating with the inner cavity 310. The fourth sleeve 343 is connected to the nozzle assembly 100. The bottom end of the nozzle assembly 100 is fitted into the fourth sleeve 343. The outer periphery of the top of the inner sleeve 340 is provided with an upwardly bent first flange 350. The first flange 350 can fit into the first sleeve 331. The bottom of the inner sleeve 340 can fit into the second sleeve 333. The sealing plate 400 is fitted into the first sleeve 331 and its side is fixedly connected to the edge of the first sleeve 331 by laser welding. The edge of the first flange 350 abuts against the bottom of the sealing plate 400. The area between the first inverted cone 332 and the second inverted cone 342 and the area between the inner sleeve 340 and the outer sleeve 330 together form the water cavity 320.

[0036] More specifically, the top and bottom of the sealing plate 400 are respectively provided with a first mounting groove 410 and a second mounting groove 420. The inner walls of the first mounting groove 410 and the second mounting groove 420 are both cylindrical structures. The axis of the first mounting groove 410 and the axis of the second mounting groove 420 are offset from each other. A first through hole 430 is provided in the sealing plate 400. The first through hole 430 is an oblique hole structure, and the two ends of the first through hole 430 are respectively connected to the bottom of the first mounting groove 410 and the bottom of the second mounting groove 420. The liquid inlet cap 60... The bottom of the 0 is installed in the first mounting groove 410. The top of the connecting sleeve 800 can be inserted into the second mounting groove 420 and a sealing ring groove 810 is provided on its outer side. A first sealing ring 820 is installed in the sealing ring groove 810. The side of the first sealing ring 820 abuts against the side of the second mounting groove 420. The bottom of the connecting sleeve 800 is sleeved with the top of the nozzle assembly 100. The diameter of the inner wall of the connecting sleeve 800 gradually decreases from its top to its bottom, forming a gradually shrinking inner diameter structure.

[0037] Additionally, a third mounting groove 440 is provided on the top of the sealing plate 400. The axis of the first mounting groove 410 is parallel to and away from the axis of the third mounting groove 440. A second through hole 450 is provided at the bottom of the third mounting groove 440, which penetrates the bottom of the third mounting groove 440 and the bottom of the sealing plate 400. The diameter of the second through hole 450 is smaller than the diameter of the third mounting groove 440, forming a stepped surface. An outwardly protruding ring 460 is provided on the outer periphery of the opening of the third mounting groove 440. A second flange 461 is provided on the top of the ring 460, extending outward from the ring 460. The sealing sleeve assembly 500 includes a second sealing ring 510, a third sealing ring 530, and a cover plate 520. The edge of the cover plate 520 is bent towards the bottom of the cover plate 520 to form a snap-fit ​​edge 521. The cross-section of the snap-fit ​​edge 521 is... The structure is C-shaped. The snap-on edge 521 can be snapped into the bottom of the second flange 461. The top of the cover plate 520 is provided with a sleeve 522. The second sealing ring 510 is installed in the third mounting groove 440 and the bottom of the second sealing ring 510 abuts against the stepped surface. The third sealing ring 530 is installed between the cover plate 520 and the ring 460 and the diameter of the third sealing ring 530 is larger than the diameter of the second sealing ring 510. The bottom of the third sealing ring 530 is provided with a boss 531. The boss 531 can extend into the third mounting groove 440 and abut against the top of the second sealing ring 510. The top of the third sealing ring 530 is provided with a sleeve 532. The sleeve 532 can pass through the sleeve 522 and extend outward. The connecting wire 700 can pass through the second sealing ring 510, the third sealing ring 530 and the sleeve 532 in sequence and extend outward.

[0038] Next, the working principle of the integrated urea metering valve with wire connection in this embodiment will be described in detail so that those skilled in the art can better understand this utility model: The coil assembly 200 is installed in the inner cavity 310 of the water jacket assembly 300. The nozzle assembly 100 is fitted inside the coil assembly 200. The area enclosed between the inner side of the outer sleeve 330 and the outer side of the inner sleeve 340, and the area enclosed between the inner side of the first inverted cone 332 and the outer side of the second inverted cone 342, together form a semi-enclosed water cavity 320, which can isolate and dissipate heat from the side and lower part of the coil assembly 200. Furthermore, the entire structure of the coil assembly 200, the nozzle assembly 100, and the connecting sleeve 800 is installed in the inner cavity 310, which not only reduces the assembly gap, thus improving the sealing performance, but also enhances heat dissipation at high temperatures. It exhibits good temperature regulation performance in both cold and hot working environments. Especially in low-temperature environments, the circulating water in the heating water chamber 320 can completely thaw the frozen urea in the connecting sleeve 800, thus solving the problem that it is difficult to completely thaw the frozen urea at the end of the nozzle assembly due to the distance between the nozzle assembly and the urea storage tank. In addition, the water chamber 320 can also play a role in heat preservation, which can slow down the freezing rate of urea in the connecting sleeve 800. Furthermore, the contraction structure of the inner wall of the connecting sleeve 800 can increase the flow rate of urea, thereby reducing the risk of blockage in the nozzle assembly 100.

[0039] The traditional fixed connector is redesigned into a flexible structure where the connecting wire 700 connects to the connector. This not only reduces the overall length of the metering valve and the vibration of the connector, but also allows for a more flexible installation angle. Furthermore, by simply installing the sealing sleeve assembly 500 at the outlet position of the third mounting slot 440, a good seal can be achieved for the inner cavity 310. This eliminates the problem of poor sealing caused by the difference in thermal expansion coefficients between the plastic and metal housings in traditional fixed connectors.

[0040] The sealing sleeve assembly 500 uses a double-sealing structure of a second sealing ring 510 and a third sealing ring 530 for sealing. When the cover plate 520 is installed, the end face of the ring 460 can be sealed by squeezing the third sealing ring 530. At the same time, the boss 531 below the third sealing ring 530 can also apply a squeezing force to the second sealing ring 510, so that the second sealing ring 510 seals the radial direction of the third mounting groove 440. Therefore, sealing in both longitudinal and transverse directions is achieved at the same time, making the sealing sleeve assembly 500 more effective. In addition, the sleeve 532 at the top of the third sealing ring 530 can not only seal the extended part of the connecting wire 700, but also protect the wire body of the connecting wire 700.

[0041] In summary, the integrated urea metering valve with wire connection in this embodiment cools the entire structure of the electromagnetic coil and the nozzle assembly 100 by fitting both the nozzle assembly 100 and the coil assembly 200 into the inner cavity 310 of the water jacket assembly 300, thereby improving the overall cooling performance. Furthermore, the flexible connection of the control circuit is achieved by setting the connecting line 700, which can better adapt to various installation spaces and avoid the failure rate caused by vibration. The inner cavity 310 is completely sealed by the sealing plate 400 and the sealing sleeve assembly 500, which can prevent the electrical components such as the coil assembly 200 from being immersed and penetrated by external water.

[0042] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A wire-connected integrated urea metering valve, comprising a nozzle assembly, a coil assembly, and a water jacket assembly, characterized in that: The water jacket assembly has an inner cavity and a water cavity. The water cavity covers the outer periphery and lower part of the inner cavity. The nozzle assembly and the coil assembly are installed in the inner cavity. The coil assembly is fitted around the outer periphery of the nozzle assembly. The top of the inner cavity is provided with a sealing plate. The sealing plate is provided with a sealing sleeve assembly and a liquid inlet cap. A connecting tube sleeve is provided between the sealing plate and the nozzle assembly. The liquid inlet cap communicates with the connecting tube sleeve. A connecting wire is provided in the inner cavity. One end of the connecting wire is connected to the coil assembly. The other end of the connecting wire passes through the sealing sleeve assembly and extends to the outside of the water jacket assembly and is provided with a connector.

2. The integrated urea metering valve with wire connection according to claim 1, characterized in that, The top and bottom of the sealing plate are respectively provided with a first mounting groove and a second mounting groove. A first through hole is provided in the sealing plate. The two ends of the first through hole are respectively connected to the bottom of the first mounting groove and the bottom of the second mounting groove. The bottom of the liquid inlet cap is installed in the first mounting groove. One end of the connecting tube sleeve is fitted in the second mounting groove and a first sealing ring is provided on the outside. The other end of the connecting tube sleeve is connected to the top of the nozzle assembly.

3. The integrated urea metering valve with wire connection according to claim 2, characterized in that, The top of the sealing plate has a third mounting groove, and the bottom of the third mounting groove has a second through hole. The second through hole passes through the bottom of the third mounting groove and the bottom of the sealing plate. The sealing sleeve assembly is installed in the third mounting groove, and the connecting wire can pass through the second through hole.

4. The integrated urea metering valve with wire connection according to claim 3, characterized in that, The axis of the first mounting groove is offset from the axis of the second mounting groove, and the axis of the first mounting groove is far from the axis of the third mounting groove.

5. The integrated urea metering valve with wire connection according to claim 2, characterized in that, The diameter of the inner wall of the connecting sleeve gradually decreases from its top end to its bottom end.

6. The integrated urea metering valve with wire connection according to claim 1, characterized in that, The water jacket assembly includes an outer sleeve and an inner sleeve. The top of the outer sleeve has a first opening, and the bottom of the outer sleeve has a first inverted cone portion and a second opening. The inner cavity is located within the inner sleeve. The top of the inner sleeve has a third opening communicating with the inner cavity, and the bottom of the inner sleeve has a second inverted cone portion and a fourth opening communicating with the inner cavity. The bottom end of the nozzle assembly is fitted into the fourth opening. The outer periphery of the top of the inner sleeve has an upwardly bent first flange that can fit into the first opening. The bottom of the inner sleeve can fit into the second opening. The sealing plate is fitted into the first opening, and the edge of the first flange abuts against the bottom of the sealing plate. The area between the first and second inverted cone portions and the area between the inner sleeve and the outer sleeve together constitute the water cavity.

7. The integrated urea metering valve with wire connection according to claim 3, characterized in that, The sealing sleeve assembly includes a second sealing ring and a cover plate. The diameter of the second through hole is smaller than the diameter of the third mounting groove. The second sealing ring is installed in the third mounting groove and the bottom of the second sealing ring abuts against the bottom of the third mounting groove. The cover plate is installed at the opening of the third mounting groove. The connecting wire can pass through the second sealing ring.

8. The integrated urea metering valve with wire connection according to claim 7, characterized in that, The outer periphery of the opening of the third mounting groove is provided with a ring sleeve, the top of the ring sleeve is provided with a second flange, and the second flange extends outward from the ring sleeve; the bottom of the cover plate is provided with a snap-fit ​​edge, which can be fastened to the second flange; the top of the cover plate is provided with a sleeve, and the connecting wire can pass through the sleeve.

9. The integrated urea metering valve with wire connection according to claim 8, characterized in that, The sealing sleeve assembly also includes a third sealing ring, which is installed between the cover plate and the ring sleeve. The bottom of the third sealing ring has a boss that can extend into the third mounting groove and abut against the top of the second sealing ring. The connecting wire can pass through the third sealing ring.

10. The integrated urea metering valve with wire connection according to claim 9, characterized in that, The top of the third sealing ring is provided with a sleeve, which can pass through the sleeve and extend outward, and the connecting line can pass through the sleeve.

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