Electromagnetic valve structure of fuel injection pump

Abstract

The utility model provides an electromagnetic valve structure of a fuel injection pump, which comprises a first magnetic connecting body and a second magnetic connecting body, a first spring is connected between the second magnetic connecting body and the first magnetic connecting body, and the second magnetic connecting body can telescopically slide relative to the first magnetic connecting body through the first spring. The first magnetic connector is sleeved with a shell, the shell is of a hollow structure, and the first magnetic connector can slide on the inner wall of the shell; one end of the shell is in threaded connection with the transfer cavity, the other end of the shell is connected with one end of the second magnetic connecting body, the end, close to the connecting cavity, in the first magnetic connecting body is provided with a rubber plug, the electromagnetic valve has no magnetic force when not powered on, at the moment, the rubber plug plugs the connecting cavity, and the electromagnetic valve generates electromagnetic force after powered on; the second magnetic connecting body slides towards the first magnetic connecting body, the first spring contracts, the rubber plug end cap is far away from the connecting cavity, and oil liquid upwards enters the nozzle connecting pipe from the transfer cavity and is finally sprayed out.

Description

Technical Field

[0001] This utility model relates to the field of gear pump technology, and more specifically, to a solenoid valve structure for an injection pump. Background Technology

[0002] A gear pump is a rotary pump that transports or pressurizes liquids by relying on the change and movement of the working volume formed between the pump cylinder and meshing gears. It consists of two gears, a pump body, and front and rear covers forming two enclosed spaces. When the gears rotate, the volume of the space on the disengaged side of the gears increases from small to large, creating a vacuum that draws in the liquid. Conversely, the volume of the space on the meshing side of the gears decreases from large to small, forcing the liquid into the pipeline.

[0003] Because the oil pressure needs to reach a certain value to meet the requirements, the existing fuel injection pump cannot reasonably control the injected oil pressure to reach the set value for use. Utility Model Content

[0004] In view of this, in order to solve the above problems, this utility model proposes a solenoid valve structure for an injection pump. By adjusting the on / off state of the solenoid valve, the solenoid valve generates magnetic force when the pressure is not reached. The rubber plug inside the solenoid valve blocks the passage between the solenoid valve and the connecting cavity. When the specified pressure is reached, the solenoid valve opens, and oil flows into the nozzle connecting pipe and is finally sprayed out, so that the pressure of the sprayed oil can reach the set value.

[0005] A solenoid valve structure for a fuel injection pump includes a nozzle connecting pipe 1, a connecting cavity 2, a solenoid valve 3, and a pump base 4. The nozzle connecting pipe 1 is connected to the upper part of the pump base 4 through the connecting cavity 2. The solenoid valve 3 is disposed on one side of the connecting cavity 2. A cavity is provided at the center of the pump base 4. An inlet pipe 52 and an outlet pipe 7 are also provided below the cavity. The output end of the cavity is connected to a diversion channel 48. Fuel flows into the cavity from the inlet pipe 52, and flows into the diversion channel 48 through continuous meshing of gears. Then, it flows out from the diversion channel 48 in two sections. One section flows upward into the solenoid valve 3, and the other section flows downward into a second chamber 6. The solenoid valve 3 includes a first magnetic connector 32 and a second magnetic connector 33. A first spring 323 is connected between the second magnetic connector 33 and the first magnetic connector 32. The first spring 323 causes the second magnetic connector 32 to be connected to the first magnetic connector 33. The first magnetic connector 32 is telescopically slidable relative to the first magnetic connector 32. The first magnetic connector 32 is fitted with a housing 31, which is a hollow structure. The first magnetic connector 32 can slide on the inner wall of the housing 31. The connecting cavity 2 is provided with a transfer chamber 23. One end of the housing 31 is threaded to the transfer chamber 23, and the other end is connected to one end of the second magnetic connector 33. The first magnetic connector 32 is provided with a rubber plug 322 at the end near the connecting cavity 2. When not energized, the solenoid valve 3 has no magnetic force. At this time, the rubber plug 322 blocks the connecting cavity 2. When the solenoid valve 3 is energized, it generates electromagnetic force, causing the second magnetic connector 33 to slide towards the first magnetic connector 32. The first spring 323 contracts, causing the rubber plug 322 to move away from the connecting cavity 2. The oil enters the nozzle connecting pipe 1 from the transfer chamber 23 and is finally sprayed out.

[0006] Furthermore, the first magnetic connector 32 has a hollow cavity 321 inside, one end of which is connected to the movable end of the first spring, and the other end of the hollow cavity 321 is provided with a rubber plug 322.

[0007] Furthermore, one end of the transfer chamber 23 is connected to the first buffer tube 22 and the second buffer tube 24, and the other end is connected to the solenoid valve 3. When the pressure is reached, the solenoid valve 3 opens to generate electromagnetic force, causing the first magnetic connector 32 to slide towards the second magnetic connector 33. The first spring 323 contracts, causing the rubber stopper 322 to move away from the first buffer tube 22 and the second buffer tube 24, so that the liquid outlet of the first buffer tube 22 and the second buffer tube 24 are connected to the rubber stopper 322. The oil enters the transfer chamber 23 from the first buffer tube 22, then enters the second buffer tube 24, and then enters the nozzle connecting pipe 1 from the transfer chamber 23. Finally, the oil is sprayed out. When the solenoid valve 3 closes and the magnetic force disappears, the first magnetic connector 32 loses its force and slides towards the connecting chamber 2, pushing the rubber stopper 322 to block the first buffer tube 22 and the second buffer tube 24.

[0008] Furthermore, the first buffer tube 22 is obliquely arranged with the transfer chamber 23, and the second buffer tube 24 is perpendicularly arranged with the transfer chamber 23.

[0009] Furthermore, the second magnetic connector 33 has a groove on the outer circumference of one end near the first spring, one end of the housing 31 is engaged with the groove, and the other end passes through the solenoid valve 3 and is placed outside the solenoid valve 3.

[0010] Furthermore, the outer end of the housing 31, located outside the solenoid valve 3, is provided with an external thread, a sealing ring 311, and a protrusion 312 in sequence. The external thread is used to connect with the connecting cavity 2. A gasket 313 is provided between the protrusion 312 and the solenoid valve 3 to prevent the housing 31 from sliding. The sealing ring 311 ensures a seal when the housing 31 is connected to the connecting cavity 2.

[0011] Furthermore, the liquid inlet end of the second buffer tube 24 is a conical surface, which makes the force-bearing area small when the rubber plug 322 blocks the liquid inlet end of the second buffer tube 24, thus facilitating sealing.

[0012] Furthermore, the outer wall of the first magnetic connector 32 is hexagonal, and the inner wall is circular.

[0013] Furthermore, the end of the second magnetic connector 33 furthest from the first spring is connected to the housing of the solenoid valve 3.

[0014] The beneficial effects of this utility model: This utility model proposes a solenoid valve structure for a fuel injection pump. The fuel injection pump includes a nozzle connecting pipe 1, a connecting cavity 2, a solenoid valve 3, and a pump base 4. The nozzle connecting pipe 1 is connected to the upper part of the pump base 4 through the connecting cavity 2. The solenoid valve 3 is disposed on one side of the connecting cavity 2. A cavity is provided in the center of the pump base 4. An inlet pipe 52 and an outlet pipe 7 are also provided below the cavity. The output end of the cavity is connected to a diversion channel 48. The oil flows into the cavity from the inlet pipe 52, and flows into the diversion channel 48 through continuous gear meshing. Then, it flows out from the diversion channel 48 in two sections. One section flows upward into the solenoid valve 3, and the other section flows downward into the second chamber 6. The solenoid valve 3 includes a first magnetic connector 32 and a second magnetic connector 33. A first spring 323 is connected between the second magnetic connector 33 and the first magnetic connector 32. The first spring 323 allows the second magnetic connector 33 to slide telescopically relative to the first magnetic connector 32. A housing 31 is sleeved on the outside of the first magnetic connector 32. The housing 31 has a hollow structure, and the first magnetic connector 32 can slide on the inner wall of the housing 31. A transfer chamber 23 is provided on the connecting cavity 2. One end of the housing 31 is threaded to the transfer chamber 23, and the other end is connected to one end of the second magnetic connector 33. A rubber plug 322 is provided inside the first magnetic connector 32 near the connecting cavity 2. When not energized, the solenoid valve 3 has no magnetic force, and the rubber plug 322 blocks the connecting cavity 2. When the solenoid valve 3 is energized, it generates electromagnetic force, causing the second magnetic connector... Body 33 slides towards the first magnetic connector 32, the first spring 323 contracts, causing the rubber plug 322 to move away from the connecting cavity 2, and the oil enters the nozzle connecting pipe 1 from the transfer chamber 23 and is finally sprayed out; by adjusting the opening and closing of the solenoid valve, the solenoid valve 3 generates magnetic force when the pressure is not reached, and the rubber plug 322 installed inside blocks the passage between the solenoid valve 3 and the connecting cavity 2. When the specified pressure is reached, the solenoid valve 3 opens, the oil enters the nozzle connecting pipe 1 and is finally sprayed out, so that the pressure of the sprayed oil can reach the set value. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the fuel injection pump of this utility model.

[0016] Figure 2 This is a cross-sectional view of the connection of the solenoid valve structure of the fuel injection pump of this utility model.

[0017] Figure 3 This is a cross-sectional view of the solenoid valve structure of the fuel injection pump of this utility model.

[0018] Figure 4 This is a structural diagram of the connecting cavity of the fuel injection pump of this utility model.

[0019] Figure 5 This is a cross-sectional view of the pump base of the solenoid valve structure of the fuel injection pump of this utility model.

[0020] Explanation of main component symbols

[0021] Nozzle connecting pipe 1, connecting cavity 2, first buffer pipe 22, transfer chamber 23, second buffer pipe 24, solenoid valve 3, housing 31, sealing ring 311, protrusion 312, gasket 313, first magnetic connector 32, hollow chamber 321, rubber stopper 322, first spring 323, second magnetic connector 33, pump base 4, diversion channel 48, inlet pipe 52, second chamber 6, outlet pipe 7.

[0022] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation Example 1:

[0023] A solenoid valve structure for a fuel injection pump includes a nozzle connecting pipe 1, a connecting cavity 2, a solenoid valve 3, and a pump base 4. The nozzle connecting pipe 1 is connected to the upper part of the pump base 4 through the connecting cavity 2. The solenoid valve 3 is disposed on one side of the connecting cavity 2. A cavity is provided at the center of the pump base 4. An inlet pipe 52 and an outlet pipe 7 are also provided below the cavity. The output end of the cavity is connected to a diversion channel 48. Fuel flows into the cavity from the inlet pipe 52, and flows into the diversion channel 48 through continuous meshing of gears. Then, it flows out from the diversion channel 48 in two sections. One section flows upward into the solenoid valve 3, and the other section flows downward into a second chamber 6. The solenoid valve 3 includes a first magnetic connector 32 and a second magnetic connector 33. A first spring 323 is connected between the second magnetic connector 33 and the first magnetic connector 32. The first spring 323 causes the second magnetic connector 32 to be connected to the first magnetic connector 33. The first magnetic connector 32 is telescopically slidable relative to the first magnetic connector 32. The first magnetic connector 32 is fitted with a housing 31, which is a hollow structure. The first magnetic connector 32 can slide on the inner wall of the housing 31. The connecting cavity 2 is provided with a transfer chamber 23. One end of the housing 31 is threaded to the transfer chamber 23, and the other end is connected to one end of the second magnetic connector 33. The first magnetic connector 32 is provided with a rubber plug 322 at the end near the connecting cavity 2. When not energized, the solenoid valve 3 has no magnetic force. At this time, the rubber plug 322 blocks the connecting cavity 2. When the solenoid valve 3 is energized, it generates electromagnetic force, causing the second magnetic connector 33 to slide towards the first magnetic connector 32. The first spring 323 contracts, causing the rubber plug 322 to move away from the connecting cavity 2. The oil enters the nozzle connecting pipe 1 from the transfer chamber 23 and is finally sprayed out.

[0024] The first magnetic connector 32 has a hollow cavity 321 inside. One end of the hollow cavity 321 is connected to the movable end of the first spring, and the other end of the hollow cavity 321 is provided with a rubber plug 322.

[0025] One end of the transfer chamber 23 is connected to the first buffer tube 22 and the second buffer tube 24, and the other end is connected to the solenoid valve 3. When the pressure is reached, the solenoid valve 3 opens to generate electromagnetic force, causing the first magnetic connector 32 to slide toward the second magnetic connector 33. The first spring 323 contracts, causing the rubber stopper 322 to move away from the first buffer tube 22 and the second buffer tube 24, so that the liquid outlet of the first buffer tube 22 and the second buffer tube 24 is connected to the rubber stopper 322. The oil enters the transfer chamber 23 from the first buffer tube 22, then enters the second buffer tube 24, and then enters the nozzle connecting pipe 1 from the transfer chamber 23. Finally, the oil is sprayed out. When the solenoid valve 3 closes and the magnetic force disappears, the first magnetic connector 32 loses its force and slides toward the connecting chamber 2, pushing the rubber stopper 322 to block the first buffer tube 22 and the second buffer tube 24.

[0026] The first buffer tube 22 is obliquely arranged with the transfer chamber 23, and the second buffer tube 24 is perpendicularly arranged with the transfer chamber 23.

[0027] The second magnetic connector 33 has a groove on the outer circumference of one end near the first spring. One end of the housing 31 is engaged with the groove, and the other end passes through the solenoid valve 3 and is placed outside the solenoid valve 3.

[0028] The housing 31, located outside the solenoid valve 3, is provided with an external thread, a sealing ring 311, and a protrusion 312 in sequence from the end. The external thread is used to connect with the connecting cavity 2. A gasket 313 is provided between the protrusion 312 and the solenoid valve 3 to prevent the housing 31 from sliding. The sealing ring 311 ensures a seal when the housing 31 is connected to the connecting cavity 2.

[0029] The liquid inlet end of the second buffer tube 24 is a conical surface, which makes the force-bearing area small when the rubber plug 322 blocks the liquid inlet end of the second buffer tube 24, making it easy to seal.

[0030] The outer wall of the first magnetic connector 32 is hexagonal, and the inner wall is circular.

[0031] The end of the second magnetic connector 33 that is away from the first spring is connected to the housing of the solenoid valve 3.

[0032] The beneficial effects of this utility model: This utility model proposes a solenoid valve structure for a fuel injection pump. The fuel injection pump includes a nozzle connecting pipe 1, a connecting cavity 2, a solenoid valve 3, and a pump base 4. The nozzle connecting pipe 1 is connected to the upper part of the pump base 4 through the connecting cavity 2. The solenoid valve 3 is disposed on one side of the connecting cavity 2. A cavity is provided in the center of the pump base 4. An inlet pipe 52 and an outlet pipe 7 are also provided below the cavity. The output end of the cavity is connected to a diversion channel 48. The oil flows into the cavity from the inlet pipe 52, and flows into the diversion channel 48 through continuous gear meshing. Then, it flows out from the diversion channel 48 in two sections. One section flows upward into the solenoid valve 3, and the other section flows downward into the second chamber 6. The solenoid valve 3 includes a first magnetic connector 32 and a second magnetic connector 33. A first spring 323 is connected between the second magnetic connector 33 and the first magnetic connector 32. The first spring 323 allows the second magnetic connector 33 to slide telescopically relative to the first magnetic connector 32. A housing 31 is sleeved on the outside of the first magnetic connector 32. The housing 31 has a hollow structure, and the first magnetic connector 32 can slide on the inner wall of the housing 31. A transfer chamber 23 is provided on the connecting cavity 2. One end of the housing 31 is threaded to the transfer chamber 23, and the other end is connected to one end of the second magnetic connector 33. A rubber plug 322 is provided inside the first magnetic connector 32 near the connecting cavity 2. When not energized, the solenoid valve 3 has no magnetic force, and the rubber plug 322 blocks the connecting cavity 2. When the solenoid valve 3 is energized, it generates electromagnetic force, causing the second magnetic connector... Body 33 slides towards the first magnetic connector 32, the first spring 323 contracts, causing the rubber plug 322 to move away from the connecting cavity 2, and the oil enters the nozzle connecting pipe 1 from the transfer chamber 23 and is finally sprayed out; by adjusting the opening and closing of the solenoid valve, the solenoid valve 3 generates magnetic force when the pressure is not reached, and the rubber plug 322 installed inside blocks the passage between the solenoid valve 3 and the connecting cavity 2. When the specified pressure is reached, the solenoid valve 3 opens, the oil enters the nozzle connecting pipe 1 and is finally sprayed out, so that the pressure of the sprayed oil can reach the set value.

[0033] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A solenoid valve structure for an injection pump, the injection pump comprising a nozzle connecting pipe (1), a connecting cavity (2), a solenoid valve (3), and a pump base (4), wherein the nozzle connecting pipe (1) is connected above the pump base (4) via the connecting cavity (2), the solenoid valve (3) is disposed on one side of the connecting cavity (2), a cavity is provided at the center of the pump base (4), and an inlet pipe (52) and an outlet pipe (7) are provided below the cavity, the output end of the cavity is connected to a diversion channel (48), oil flows into the cavity from the inlet pipe (52), and flows into the diversion channel (48) through continuous meshing of gears, and then flows out from the diversion channel (48) in two sections, one section flowing upward into the solenoid valve (3), and the other section flowing downward into the second chamber (6), characterized in that: The solenoid valve (3) includes a first magnetic connector (32) and a second magnetic connector (33). A first spring (323) is connected between the second magnetic connector (33) and the first magnetic connector (32). The second magnetic connector (33) can slide relative to the first magnetic connector (32) through the first spring (323). A shell (31) is sleeved on the outside of the first magnetic connector (32). The shell (31) is a hollow structure. The first magnetic connector (32) can slide on the inner wall of the shell (31). A transfer chamber (23) is provided on the connecting cavity (2). One end of the shell (31) The first magnetic connector (32) is threaded to the transfer chamber (23) and connected to one end of the second magnetic connector (33). The first magnetic connector (32) has a rubber plug (322) at one end near the connecting cavity (2). When the solenoid valve (3) is not energized, there is no magnetic force. At this time, the rubber plug (322) blocks the connecting cavity (2). When the solenoid valve (3) is energized, it generates electromagnetic force, causing the second magnetic connector (33) to slide towards the first magnetic connector (32). The first spring (323) contracts, causing the rubber plug (322) to move away from the connecting cavity (2). The oil enters the nozzle connecting pipe (1) from the transfer chamber (23) and is finally sprayed out.

2. The solenoid valve structure of the fuel injection pump as described in claim 1, characterized in that: The first magnetic connector (32) has a hollow cavity (321) inside. One end of the hollow cavity (321) is connected to the movable end of the first spring, and the other end of the hollow cavity (321) is provided with a rubber plug (322).

3. The solenoid valve structure of the fuel injection pump as described in claim 1, characterized in that: One end of the transfer chamber (23) is connected to the first buffer tube (22) and the second buffer tube (24), and the other end is connected to the solenoid valve (3). When the pressure is reached, the solenoid valve (3) opens to generate electromagnetic force, causing the first magnetic connector (32) to slide towards the second magnetic connector (33). The first spring (323) contracts, causing the rubber plug (322) to move away from the first buffer tube (22) and the second buffer tube (24), so that the first buffer tube (22) and the second buffer tube (24) slide towards each other. 4) The outlet end is connected to the rubber stopper (322). The oil enters the transfer chamber (23) from the first buffer tube (22) and then enters the second buffer tube (24). The oil enters the nozzle connecting tube (1) from the transfer chamber (23) and finally sprays out. When the solenoid valve (3) is closed and the magnetic force disappears, the first magnetic connector (32) loses its force and slides towards the connecting chamber (2), pushing the rubber stopper (322) to block the first buffer tube (22) and the second buffer tube (24).

4. The solenoid valve structure of the fuel injection pump as described in claim 3, characterized in that: The first buffer tube (22) is obliquely arranged with the transfer chamber (23), and the second buffer tube (24) is perpendicularly arranged with the transfer chamber (23).

5. The solenoid valve structure of the fuel injection pump as described in claim 1, characterized in that: The second magnetic connector (33) has a groove on the outer circumference of one end near the first spring. One end of the housing (31) is engaged with the groove, and the other end passes through the solenoid valve (3) and is placed outside the solenoid valve (3).

6. The solenoid valve structure of the fuel injection pump as described in claim 1, characterized in that: The housing (31) is provided with an external thread, a sealing ring (311), and a protrusion (312) in sequence at one end outside the solenoid valve (3). The external thread is used to connect with the connecting cavity (2). A gasket (313) is provided between the protrusion (312) and the solenoid valve (3) to prevent the housing (31) from sliding. The sealing ring (311) seals the housing (31) when it is connected to the connecting cavity (2).

7. The solenoid valve structure of the fuel injection pump as described in claim 3, characterized in that: The liquid inlet end of the second buffer tube (24) is a conical surface, which makes the force area small when the rubber plug (322) blocks the liquid inlet end of the second buffer tube (24), making it easy to seal.

8. The solenoid valve structure of the fuel injection pump as described in claim 1, characterized in that: The outer wall of the first magnetic connector (32) is hexagonal and the inner wall is circular.

9. The solenoid valve structure of the fuel injection pump as described in claim 1, characterized in that: The end of the second magnetic connector (33) away from the first spring is connected to the housing of the solenoid valve (3).

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