Pressure regulating valve of fuel pump

Abstract

The utility model relates to the technical field of pressure regulating valves, and discloses a pressure regulating valve of a fuel pump, which comprises a valve body, the top of the valve body is fixedly connected with a mounting pipe, a sealing ring is arranged in the mounting pipe, a plurality of cavities are arranged outside the mounting pipe, a first spring is arranged in each cavity, and a second spring is arranged in each cavity. A cavity is formed in the mounting pipe, a sliding plate is slidably connected into the cavity, connecting shafts are rotatably connected to the two ends of the bottom of the sliding plate, a limiting assembly is arranged in the mounting pipe and comprises a plurality of clamping plates and a plurality of sliding grooves, the tops of the clamping plates are rotatably connected to the bottoms of the connecting shafts, and the sliding grooves are formed in the mounting pipe. The exterior of the clamping plate is slidably connected to the inner wall of the sliding groove. According to the sealing ring dismounting device, the sealing ring can be quickly dismounted, external tools are not needed, operation is convenient, and the sealing ring can be conveniently maintained and cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure regulating valves, in particular to a pressure regulating valve for a fuel pump. Background Art

[0002] The fuel pump pressure regulating valve is an important component in the engine fuel system, ensuring that fuel is supplied to the injection system at the appropriate pressure to ensure the normal operation of the engine and fuel efficiency. Designing and adjusting these valves needs to take into account the performance needs of the engine, the pressure requirements of the fuel system, and changes in the operating environment, which helps to ensure the normal operation of the engine and improve the efficiency of the fuel injection system.

[0003] In order to prevent fuel leakage, the fuel pump pressure regulating valve is usually designed with a leak-proof structure such as a sealing ring to ensure that the fuel does not leak out of the valve when the valve is closed. The sealing ring is usually installed inside the mounting tube using other components, but in order to maintain the sealing effect of the sealing ring, regular cleaning and maintenance are required. Therefore, it is often necessary to use external tools to operate during disassembly, which is time-consuming and laborious. Therefore, in view of the above shortcomings, a fuel pump pressure regulating valve is proposed. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose a fuel pump pressure regulating valve, aiming to improve the problem in the prior art that in order to maintain the sealing effect of the sealing ring, regular cleaning and maintenance are required, so external tools are often needed for operation during disassembly, which is time-consuming and laborious.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pressure regulating valve for a fuel pump comprises a valve body, a mounting tube is fixedly connected to the top of the valve body, a sealing ring is arranged inside the mounting tube, a plurality of cavities are opened outside the mounting tube, a spring is arranged inside the cavity, a slide plate is slidably connected inside the cavity, connecting shafts are rotatably connected to both ends of the bottom of the slide plate, and a limit position assembly is arranged inside the mounting tube.

[0007] Furthermore, the limiting assembly includes a plurality of clamping plates and a plurality of slide grooves, the top of the clamping plate is rotatably connected to the bottom of the connecting shaft, the slide groove is opened inside the mounting tube, and the outside of the clamping plate is slidably connected to the inner wall of the slide groove.

[0008] Furthermore, one end of the spring 1 is fixedly connected to the bottom of the slide plate, and the other end of the spring 1 is fixedly connected to the bottom of the cavity.

[0009] Furthermore, a pull rod is fixedly connected to the top of the slide plate, and the outside of the pull rod is slidably connected to the external through hole of the mounting tube.

[0010] Furthermore, a plurality of slots are provided on the outside of the sealing ring, and the outside of the clamping plate is engaged with the inner walls of the slots.

[0011] Furthermore, a mounting plate is fixedly connected to the bottom of the valve body, and a base is fixedly connected to the bottom of the mounting plate.

[0012] Furthermore, a second spring is sleeved on the outside of the base, one end of the second spring is fixedly connected to the bottom of the base, and the other end of the second spring is fixedly connected to the top of the base.

[0013] The utility model has the following beneficial effects:

[0014] In the utility model, through the mutual cooperation of the valve body, mounting tube, sealing ring, cavity, spring, pull rod, connecting shaft, clamping plate, slide groove, clamping groove and other structures, the sealing ring can be quickly disassembled without the aid of external tools, and the operation is convenient, which facilitates the maintenance and cleaning of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a fuel pump pressure regulating valve proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the installation pipe structure of a fuel pump pressure regulating valve proposed by the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of a cavity of a fuel pump pressure regulating valve proposed by the utility model.

[0018] Legend:

[0019] 1. Valve body; 2. Mounting tube; 3. Sealing ring; 4. Cavity; 5. Spring 1; 6. Slide plate; 7. Pull rod; 8. Connecting shaft; 9. Clamp plate; 10. Slide groove; 11. Clamp groove; 12. Mounting plate; 13. Base; 14. Spring 2. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Reference Figure 1-3The utility model provides an embodiment: a pressure regulating valve for a fuel pump, comprising a valve body 1, firstly placing the valve body 1 in a suitable position, a mounting tube 2 is fixedly connected to the top of the valve body 1, a sealing ring 3 is arranged inside the mounting tube 2, and then the sealing ring 3 is placed inside the mounting tube 2, a plurality of cavities 4 are opened outside the mounting tube 2, a spring 5 is arranged inside the cavity 4, one end of the spring 5 is fixedly connected to the bottom of a slide plate 6, a pull rod 7 is fixedly connected to the top of the slide plate 6, when the pull rod 7 is pressed, the slide plate 6 will slide inside the cavity 4 and squeeze the spring 5, at this time, the spring 5 is compressed due to its own elasticity. The mass will absorb external force, the inside of the cavity 4 is slidably connected with a slide plate 6, the other end of the spring 5 is fixedly connected to the bottom of the cavity 4, and the pull rod 7 is pressed inward at the same time, and the outside of the pull rod 7 is slidably connected to the external through hole of the mounting tube 2, and the bottom ends of the slide plate 6 are rotatably connected with a connecting shaft 8, and the connecting shaft 8 will rotate with the movement of the clamping plate 9. A limit assembly is arranged inside the mounting tube 2, and the limit assembly includes multiple clamping plates 9 and multiple sliding grooves 10. The top of the clamping plate 9 is rotatably connected to the bottom of the connecting shaft 8, and the sliding groove 10 is opened inside the mounting tube 2. The outside of the clamping plate 9 is slidably connected to the inner wall of the sliding groove 10, which will drive the The two clamping plates 9 move towards each other inside the slide groove 10, and the slide groove 10 can limit the clamping plates 9 to prevent them from deflecting under the drive of the connecting shaft 8. A plurality of clamping grooves 11 are provided on the outside of the sealing ring 3. When the clamping plates 9 are in contact with the clamping grooves 11, the pull rod 7 is released, and the outside of the clamping plates 9 is engaged with the inner wall of the clamping grooves 11. At this time, the spring 15 will release the absorbed external force to generate a reaction force on the pull rod 7, so that the pull rod 7 moves outward and resets. At the same time, the clamping plates 9 are expanded to both sides and engaged with the clamping grooves 11. When disassembling, the pull rod 7 is pulled again to remove the sealing ring 3. The bottom of the valve body 1 is fixedly connected with a mounting plate 12, which can It is convenient for the valve body 1 to be installed on other objects. The bottom of the mounting plate 12 is fixedly connected with a base 13. When in use, the bottom of the valve body 1 will be affected by external force. The outer sleeve of the base 13 is provided with a spring 14. One end of the spring 14 is fixedly connected to the bottom of the base 13, and the other end of the spring 14 is fixedly connected to the top of the base 13. The spring 14 provides a reaction force to resist the fuel pressure entering the pressure regulating valve. By adjusting the tension of the spring 14, the opening pressure of the pressure regulating valve can be adjusted, thereby realizing the rapid disassembly of the sealing ring 3 without the aid of external tools. The operation is convenient, and the maintenance and cleaning of the sealing ring 3 are convenient.

[0022] Working principle: first place the valve body 1 in a suitable position, then place the sealing ring 3 inside the mounting tube 2, and press the pull rod 7 inward at the same time. When the pull rod 7 is pressed, the slide plate 6 will slide inside the cavity 4 and squeeze the spring 5. At this time, the spring 5 is compressed and absorbs external force due to its own elastic properties. At the same time, the connecting shaft 8 will rotate with the movement of the card plate 9. When the connecting shaft 8 rotates, it will drive the two card plates 9 to move inside the slide groove 10, so that the two card plates 9 are close to each other, so that the card plate 9 withdraws from the inner wall of the card groove 11 to release the sealing ring. 3 is removed. When installing, press the pull rod 7 to place the sealing ring 3, and then release the pull rod 7. At this time, the spring 1 5 will release the external force absorbed to generate a reaction force on the pull rod 7, so that the pull rod 7 moves outward and resets. At the same time, the clamping plate 9 is unfolded to both sides and engaged with the clamping groove 11, so that when disassembling, the pull rod 7 is pulled again to remove the sealing ring 3. When in use, the bottom of the valve body 1 will be affected by the external force. The spring 2 14 provides a reaction force to resist the fuel pressure entering the pressure regulating valve. By adjusting the tension of the spring 2 14, the opening pressure of the pressure regulating valve can be adjusted.

[0023] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fuel pump pressure regulating valve, comprising a valve body (1), characterized in that: The top of the valve body (1) is fixedly connected to a mounting tube (2), a sealing ring (3) is arranged inside the mounting tube (2), a plurality of cavities (4) are opened outside the mounting tube (2), a spring (5) is arranged inside the cavity (4), a slide plate (6) is slidably connected inside the cavity (4), both ends of the bottom of the slide plate (6) are rotatably connected to connecting shafts (8), and a limit position component is arranged inside the mounting tube (2).

2. A fuel pump pressure regulating valve according to claim 1, characterized in that: The limiting assembly comprises a plurality of clamping plates (9) and a plurality of slide grooves (10), the top of the clamping plate (9) is rotatably connected to the bottom of the connecting shaft (8), the slide groove (10) is opened inside the mounting tube (2), and the outside of the clamping plate (9) is slidably connected to the inner wall of the slide groove (10).

3. A fuel pump pressure regulating valve according to claim 1, characterized in that: One end of the spring one (5) is fixedly connected to the bottom of the slide plate (6), and the other end of the spring one (5) is fixedly connected to the bottom of the cavity (4).

4. A fuel pump pressure regulating valve according to claim 1, characterized in that: The top of the slide plate (6) is fixedly connected to a pull rod (7), and the outside of the pull rod (7) is slidably connected to the external through hole of the mounting tube (2).

5. A fuel pump pressure regulating valve according to claim 2, characterized in that: The sealing ring (3) is provided with a plurality of slots (11) on the outside, and the outside of the clamping plate (9) is clamped with the inner wall of the slots (11).

6. A fuel pump pressure regulating valve according to claim 1, characterized in that: The bottom of the valve body (1) is fixedly connected to a mounting plate (12), and the bottom of the mounting plate (12) is fixedly connected to a base (13).

7. A fuel pump pressure regulating valve according to claim 6, characterized in that: A second spring (14) is sleeved on the outside of the base (13), one end of the second spring (14) is fixedly connected to the bottom of the base (13), and the other end of the second spring (14) is fixedly connected to the top of the base (13).

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