Split type valve seat for gas injection valve of gas machine and injection valve

Abstract

The utility model discloses a split type valve seat for a gas injection valve of a gas machine and the injection valve, solves the problem that an arc-shaped hole at a first valve seat of the gas injection valve in the prior art is difficult to process, and has the beneficial effects that the processing is convenient, and the strength and the reliability of the valve seat are improved. According to the specific scheme, according to the split type valve seat for the gas injection valve of the gas machine, a first valve seat is hollow, a second valve seat is supported through a base, the second valve seat penetrates through the hollow position of the first valve seat, and a through hole is formed in the second valve seat; the diameter of the part, located in the hollow position of the first valve seat, of the second valve seat is smaller than the inner diameter of the hollow position of the first valve seat to form an annular belt channel, the annular belt channel communicates with the through hole, and the hollow position of the first valve seat can be blocked by the valve plate.

Description

Technical Field

[0001] This utility model relates to the field of gas engine technology, and in particular to a split valve seat for a gas engine fuel injection valve. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] One type of fuel used to power internal combustion engines is gaseous fuel, such as compressed natural gas (CNG) or liquefied petroleum gas (LPG). Fuel injectors, which supply this metered gaseous fuel to the fuel consumption device of the internal combustion engine, are well known. In a typical fuel injector, a valve plate is located in the fuel passage of the fuel injector and axially reciprocates with and disengages from a valve seat to control the flow of gas through the gas injection valve.

[0004] refer to Figure 1 , Figure 2 and Figure 3 The existing valve seat structure shown has a valve seat 2 supported by a base 3, both of which cooperate with the valve body. The valve seat 2 has four through-holes 6, which are arranged around the center of the valve seat 2 and protrude from the valve seat surface. The valve plate reciprocates to contact and disengage from the protruding valve seat surface to stop or start the gas flow into the valve seat. Although this structure can maximize the flow rate without increasing the valve plate lift, it increases the complexity and cost of the gas injection valve. The disadvantages are that the width of a single arc hole is about 0.5 mm, which is difficult to process and difficult to form using metal casting and powder metallurgy processes; the arc holes protrude from the valve seat surface, and the hole walls are relatively thin, which can easily affect the strength and reliability of the valve seat; moreover, if the processing error of the arc holes is large, the valve seat becomes scrap, resulting in high processing costs. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a split valve seat for a gas engine fuel injection valve, which reduces the processing difficulty of the valve seat and increases the strength and reliability of the valve seat.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] A split-type valve seat for a gas engine fuel injection valve includes a first valve seat and a base. The base supports a second valve seat. The first valve seat, the base, and the valve body are fitted together. A valve plate is located between the first valve seat and the valve body. The valve plate is movable relative to the first valve seat. The first valve seat is hollow. The second valve seat is supported by the base and passes through the hollow part of the first valve seat. The second valve seat has a through hole. The diameter of the portion of the second valve seat located in the hollow part of the first valve seat is smaller than the inner diameter of the hollow part of the first valve seat to form an annular channel. The annular channel communicates with the through hole. The valve plate can block the hollow part of the first valve seat.

[0008] As described above, a split valve seat for a gas engine fuel injection valve is provided. Considering the installation of the second valve seat, the second valve seat is T-shaped. One end of the second valve seat is supported through the shoulder hole of the base. The second valve seat is fitted with the shoulder hole of the base to install the second valve seat. The first valve seat is installed after the second valve seat is installed.

[0009] As described above, a split valve seat for a gas engine fuel injection valve has a slotted hole at one end of the second valve seat near the valve plate so that the annular channel protrudes towards one side of the valve plate. A spring is provided in the valve body, and the spring abuts against the valve plate.

[0010] As described above, a split valve seat for a gas engine fuel injection valve, considering space constraints, includes a support plate connected to a support column, the support column being inserted into the hollow portion of the first valve seat, and the support plate having a through hole on the side of the support column.

[0011] As described above, in a split-type valve seat for a gas engine fuel injection valve, the outer diameter of the side of the second valve seat that mates with the base is larger than the outer diameter of the hollow part of the first valve seat, so that the fuel gas flows through the annular channel between the second valve seat and the first valve seat, and through the through hole of the second valve seat into the injection hole of the base.

[0012] As described above, in order to achieve gas injection, the inner diameter of the hollow part of the first valve seat near the base is larger than the inner diameter of the other side.

[0013] As described above, a split valve seat for a gas injection valve for a gas engine has a second valve seat provided with multiple through holes, with an angle set between adjacent through holes. The arrangement of multiple through holes ensures the amount of gas entering the base.

[0014] As described above, a split valve seat for a gas engine fuel injection valve has an opening on the valve plate. The fuel gas passes through the internal channel of the valve body, then through the opening on the valve plate, enters the space between the valve plate and the first valve seat, then enters the annular channel, the through hole of the second valve seat, and finally enters the injection hole of the base.

[0015] As described above, a split valve seat for a gas engine fuel injection valve has an injection hole provided on the base, the inner diameter of which is smaller than the diameter of the portion of the second valve seat that mates with the base.

[0016] Secondly, this utility model also provides a gas engine fuel injection valve, including the aforementioned split valve seat for a gas engine fuel injection valve.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1) The structure of this utility model is reasonable. The split valve seat includes a first valve seat and a second valve seat. The second valve seat is installed using the shoulder hole of the base. The second valve seat passes through the hollow part of the first valve seat. In this way, there is no need to process a narrow arc hole at the first valve seat. The first valve seat and the second valve seat cooperate to form a narrow annular channel, which is convenient for overall processing.

[0019] 2) This utility model forms an annular channel by the cooperation of the first valve seat and the second valve seat, which avoids valve seats with thin hole walls, effectively ensuring the strength and reliability of the valve seat. Moreover, it eliminates the need to process narrow arc holes, preventing the first valve seat and the second valve seat from becoming scrap, and effectively controlling processing costs.

[0020] 3) The second valve seat in this utility model has a reasonable structure. The second valve seat makes full use of the structure of the base shoulder hole and the hollow part of the first valve seat, and is set as T-shaped. The second valve seat cooperates with the base through the support plate, and the support column is connected to the support plate. This makes it convenient to fit the first valve seat around the periphery of the second valve seat during installation, so that a narrower annular channel is formed between the first valve seat and the second valve seat. Attached Figure Description

[0021] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0022] Figure 1 This is an enlarged schematic diagram of the mating point between the valve seat structure and the valve body in the prior art of gas injection valves.

[0023] Figure 2 This is a top view of the valve seat in a gas injection valve in the prior art.

[0024] Figure 3 This is a schematic diagram of the valve seat in a gas injection valve in the prior art.

[0025] Figure 4 This is an enlarged schematic diagram of the mating point between the split valve seat and the valve body of a gas engine fuel injection valve according to one or more embodiments of the present invention.

[0026] Figure 5 This is a top view of the first valve seat and the second valve seat cooperating in a split valve seat for a gas engine fuel injection valve according to one or more embodiments of the present invention.

[0027] Figure 6 This is a schematic diagram of a second valve seat with a through hole in a split valve seat for a gas engine fuel injection valve according to one or more embodiments of the present invention.

[0028] Figure 7 This is a schematic diagram of a valve plate in a split valve seat for a gas engine fuel injection valve according to one or more embodiments of the present invention.

[0029] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0030] Among them: 1. Valve plate, 1-1. Opening, 2. Valve seat, 3. Base, 3-1. Injection hole, 4. First valve seat, 5. Second valve seat, 5-1. Support plate, 5-2. Support column, 6. Arc-shaped hole, 7. Through hole, 8. Valve body, 9. Circular channel. Detailed Implementation

[0031] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise expressly indicated by the present invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] As described in the background section, there is a problem with the high difficulty in processing valve seats in the prior art. In order to solve the above technical problems, this utility model proposes a split valve seat for a gas engine fuel injection valve.

[0034] Example 1

[0035] In a typical embodiment of this utility model, refer to Figure 4As shown, a split valve seat for a gas engine fuel injection valve includes a first valve seat 4 and a base 3. The base 3 supports a second valve seat 5. The first valve seat 4, the base 3, and the valve body 8 are fitted together. A valve plate 1 is located between the first valve seat 4 and the valve body 8. The valve plate 1 is movable relative to the first valve seat 4. The first valve seat 4 is hollow and supports the second valve seat 5 via the base 3. The second valve seat 5 passes through the hollow portion of the first valve seat 4 and has a through hole. (Reference) Figure 5 As shown, the diameter of the portion of the second valve seat 5 located in the hollow part of the first valve seat 4 is smaller than the inner diameter of the hollow part of the first valve seat 4 to form an annular channel 9. The annular channel 9 is connected to the through hole 7, and the valve plate can block the hollow part of the first valve seat.

[0036] Considering that a shoulder hole is provided between the base 3 and the first valve seat 4, and the center of the base 3 is the injection hole 3-1, the shoulder hole is connected to the injection hole 3-1, and the inner diameter of the injection hole 3-1 is smaller than the diameter of the part of the second valve seat that mates with the base, in this embodiment, the second valve seat 5 is T-shaped, and one end of the second valve seat 5 is supported by the shoulder hole of the base 3. The second valve seat 5 mates with the shoulder hole of the base 3 to install the second valve seat, and the first valve seat is installed after the second valve seat 5 is installed.

[0037] It is easy to understand that a slotted hole is provided at one end of the second valve seat 5 near the valve plate 1. The slotted hole has a set depth, which is less than the height of the support column 5-2. A spring is provided at the center of the valve body, and the spring abuts against the valve plate. A coil is provided in the valve body 8. When the coil is energized, the valve plate 1 moves upward and separates from the first and second valve seats under the action of electromagnetic force, so that the gas can flow downward through the valve plate opening.

[0038] Considering the spatial arrangement, the second valve seat 5 specifically includes a support plate 5-1. The outer side of the support plate 5-1 mates with the shoulder hole of the base. The thickness of the support plate 5-1 is the same as the height of the shoulder hole of the base. The side of the support plate facing the first valve seat is connected to the support column 5-2. The central axes of the support plate 5-1 and the support column 5-2 are aligned. The support column 5-2 is inserted into the hollow part of the first valve seat 4. A slotted hole is provided on the side of the support column 5-2 away from the support plate. The slotted hole can be a circular hole. The depth of the slotted hole is less than the height of the support column. Because the first valve seat has a recess on the side facing the valve plate, the end of the support column 5-2 away from the support plate 5-1 protrudes from the recess. The side of the first valve seat away from the base also protrudes from the periphery of the hollow part to ensure that the center of the first valve seat protrudes from the surface of the first valve seat. The support plate 5-1 has a through hole on the side of the support column 5-2. The distance between the outer wall of the through hole and the central axis of the support plate is greater than the inner diameter of the wider part of the hollow part of the first valve seat.

[0039] It is easy to understand that the outer diameter of the side of the second valve seat 5 that mates with the base 3 is larger than the outer diameter of the hollow part of the first valve seat, so that the gas flows through the annular channel 9 between the second valve seat 5 and the first valve seat 4 and the through hole of the second valve seat 5 into the injection hole 3-1 of the base 3.

[0040] To achieve gas injection, it is easy to understand that the inner diameter of the hollow part of the first valve seat 4 near the base 3 is larger than the inner diameter of the other side, and the diameter of the support column 5-2 is smaller than the smaller inner diameter of the first valve seat.

[0041] refer to Figure 6 As shown, the support plate 5-1 in the second valve seat 5 is provided with multiple through holes, for example, 6 holes. The interval between two adjacent through holes is set at an angle. The arrangement of multiple through holes 7 ensures the amount of gas entering the base.

[0042] Additionally, it should be explained that the reference Figure 7 As shown, valve plate 1 has a central hole, and multiple openings 1-1 are provided around the central hole. A rubber pad is provided on the side of valve plate 1 near the first valve seat. The diameter of the rubber pad is larger than the diameter of the narrower side of the hollow part of the first valve seat. The outer diameter of the spring is larger than the inner diameter of the central hole of the valve plate so that the valve plate and the spring abut against each other. After the coil in the valve body is energized, valve plate 1 moves upward against the spring force. The gas passes through the internal channel of the valve body, then through the valve plate openings 1-1 and the valve plate central hole, enters between valve plate 1 and the first valve seat 4, then enters the annular channel 9, the second valve seat through hole 7, and finally enters the injection hole 3-1 of the base.

[0043] The split valve seat provided in this embodiment has a reasonable structure. The split valve seat includes a first valve seat 4 and a second valve seat 5. The second valve seat 5 is installed using the shoulder hole of the base 3. The second valve seat 5 passes through the hollow part of the first valve seat 4. In this way, there is no need to process a narrow arc-shaped hole at the first valve seat 4. The first valve seat 4 and the second valve seat 5 cooperate to form a narrow annular channel 9, which is convenient for overall processing and can also effectively increase the strength and reliability of the valve seat structure, and reduce the probability of the valve seat becoming a scrap.

[0044] Example 2

[0045] This embodiment provides a gas injection valve for a gas engine, including a split valve seat for a gas injection valve for a gas engine as described in Embodiment 1.

[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A split-type valve seat for a gas engine fuel injection valve, comprising a first valve seat and a base, the base supporting a second valve seat, the first valve seat and the base cooperating with a valve body, a valve plate being disposed between the first valve seat and the valve body, the valve plate being movable relative to the first valve seat, characterized in that, The first valve seat is hollow, the second valve seat is supported by the base, the second valve seat passes through the hollow of the first valve seat, the second valve seat is provided with a through hole, the diameter of the part of the second valve seat in the hollow of the first valve seat is smaller than the inner diameter of the hollow of the first valve seat to form a ring belt channel, the ring belt channel is communicated with the through hole, and the valve sheet can block the hollow of the first valve seat.

2. The split valve seat for a gas injection valve of a gas engine according to claim 1, characterized in that The second valve seat is T-shaped, and one end of the second valve seat is supported by the shoulder hole of the base.

3. The split valve seat for a gas injection valve of a gas engine according to claim 1, characterized in that The second valve seat is provided with a slotted hole near one end of the valve sheet to protrude the ring belt channel to one side of the valve sheet.

4. The split valve seat for a gas injection valve of a gas engine according to claim 1, characterized in that The second valve seat comprises a support plate connected with a support column, the support column is inserted into the hollow of the first valve seat, and the support plate is provided with the through hole on the side of the support column.

5. The split valve seat for a gas injection valve of a gas engine according to claim 1, characterized in that The outer diameter of the second valve seat on the side matched with the base is larger than the outer diameter of the hollow of the first valve seat.

6. The split valve seat for a gas injection valve of a gas engine according to claim 1, characterized in that The inner diameter of the hollow of the first valve seat on the side close to the base is larger than the inner diameter on the other side.

7. The split valve seat for a gas injection valve of a gas engine according to claim 1, characterized in that The second valve seat is provided with a plurality of through holes, and the adjacent two through holes are arranged at a set angle.

8. The split valve seat for a gas injection valve of a gas engine according to claim 1, characterized in that The valve sheet is provided with an opening.

9. The split valve seat for a gas injection valve of a gas engine of claim 1, wherein The base is provided with a jet hole, and the inner diameter of the jet hole is smaller than the diameter of the part of the second valve seat matched with the base.

10. A gas injection valve for a gas engine, characterized in that A split valve seat for a gas injection valve of a gas engine, comprising any one of claims 1-9.

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