Pressure feedback type fuel cut-off electromagnetic valve assembly

Abstract

The utility model belongs to the technical field of electromagnetic valves, and particularly relates to a pressure feedback type fuel cut-off electromagnetic valve assembly which comprises a fuel cut-off electromagnetic valve body and an L-shaped mounting frame, a fixing sleeve comprises an arc-shaped steel ring, and the arc-shaped steel ring is arranged on the fuel cut-off electromagnetic valve body in a sleeving mode and fixedly connected with the mounting frame. A first fixing piece and a second fixing piece are fixed to the two ends of the arc-shaped steel ring respectively. The overturning screw rod is hinged to the first fixing piece, and a notch for the overturning screw rod to penetrate through is formed in the second fixing piece; the butterfly nut is mounted at the extending end of the overturning screw rod in a thread screwing manner; according to the utility model, through the matching of the butterfly nut and the overturning screw rod, the quick locking and dismounting are realized, compared with the traditional screw fixation, the fixing is more efficient, and compared with the clamping type mounting structure of the improved scheme in the prior art, the structure is more stable, the shaking amplitude is reduced, and the use reliability is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic valve technology, specifically relating to a pressure feedback type oil shut-off electromagnetic valve assembly. Background Technology

[0002] A pressure feedback fuel cut-off solenoid valve is a valve device used in fuel systems (especially diesel engines). It achieves fuel cut-off through electromagnetic control and integrates a pressure feedback mechanism to improve control accuracy and reliability. It is mainly used in the fuel supply system of diesel engines. The valve opening and closing is controlled by the on and off of the electromagnetic coil to achieve fuel cut-off during normal shutdown or emergency shutdown, preventing abnormal engine operation.

[0003] Compared to ordinary fuel cut-off solenoid valves, these valves have built-in pressure monitoring elements (such as pressure sensors or mechanical feedback mechanisms) that can sense pressure changes in the fuel line in real time and feed the signal back to the control system (such as the ECU), ensuring the reliability of the fuel cut-off action and the monitorability of the system status.

[0004] Oil shut-off solenoid valves are typically mounted to the oil pump using a support bracket and screws. While this meets general usage requirements, the disassembly speed is slow and the installation and disassembly are not convenient when maintenance or replacement is needed.

[0005] A search revealed that a Chinese utility model patent with authorization announcement number CN220285887U discloses an "oil shut-off solenoid valve," which includes an oil shut-off solenoid valve body, a disassembly frame, and a fixing structure. The disassembly frame includes a top plate and a mounting plate. The top plate is disposed on the oil shut-off solenoid valve body, and the mounting plate is disposed at the bottom of the top plate. The mounting plate has several positioning holes. The fixing structure includes a fixing plate, positioning bolts, and a spring clip assembly. Several positioning bolts for mounting to an oil pump pass through the fixing plate.

[0006] Although existing fuel cut-off solenoid valves, including those mentioned above, are easy to disassemble and assemble, in the locked state, they rely solely on a locking structure consisting of a spring and a retaining plate to maintain stability, resulting in poor stability. Engine vibrations or external forces can easily cause the fuel cut-off solenoid valve to vibrate, affecting its reliability.

[0007] To address the aforementioned problems, this utility model proposes a pressure feedback type oil shut-off solenoid valve assembly. Utility Model Content

[0008] To address the aforementioned problems in the existing technology, this utility model provides a pressure feedback type oil shut-off solenoid valve assembly, which features convenient use, easy disassembly and assembly, and high stability.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a pressure feedback type oil shut-off solenoid valve assembly, comprising an oil shut-off solenoid valve body and an "L"-shaped mounting bracket, wherein the oil shut-off solenoid valve body is fixed to an oil pump via the mounting bracket, and a mounting hole is provided on the mounting bracket; further comprising a fixing sleeve, wherein the oil shut-off solenoid valve body is fixed to the mounting bracket via the fixing sleeve, and wherein the fixing sleeve comprises:

[0010] An arc-shaped steel ring is fitted onto the body of the oil cut-off solenoid valve and fixedly connected to the mounting bracket. A first fixing piece and a second fixing piece are fixed at both ends of the arc-shaped steel ring, respectively.

[0011] A flip screw is hinged to the first fixing plate, and a notch is provided on the second fixing plate for the flip screw to pass through.

[0012] A wing nut is installed on the extended end of the reversing screw by means of thread engagement.

[0013] As a preferred technical solution of this utility model, the oil shut-off solenoid valve body is fixed on the mounting bracket by two sets of spaced fixing sleeves.

[0014] As a preferred embodiment of this utility model, the fixing sleeve includes two spaced-apart arc-shaped steel rings.

[0015] As a preferred embodiment of this utility model, the fixing sleeve further includes:

[0016] A threaded rod is fixed to the outer wall of the arc-shaped steel ring and passes through the mounting bracket, and a limit ring is fixed on the threaded rod;

[0017] A locking nut is installed on the protruding end of the threaded rod by means of threaded engagement.

[0018] As a preferred embodiment of this utility model, the fixing sleeve further includes:

[0019] A rubber sleeve, which is located inside the arc-shaped steel ring.

[0020] As a preferred embodiment of this utility model, it further includes:

[0021] The positioning protrusion ring is integrally formed on the outer wall of the rubber sleeve and is embedded in the inner space of the two arc-shaped steel rings.

[0022] As a preferred embodiment of this utility model, it further includes:

[0023] An angle gusset plate is welded and fixed to the inside of the included angle of the mounting frame.

[0024] As a preferred embodiment of this utility model, the threaded rod is welded and fixed to the outer wall of the arc-shaped steel ring, and the first fixing piece and the second fixing piece are welded and fixed to the inner side of the two arc-shaped steel rings.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] In this invention, the cooperation of the wing nut and the flip screw enables quick locking and disassembly, which is more efficient than traditional screw fixing. At the same time, compared with the snap-fit ​​installation structure of the existing technology, it is more stable, reduces the amplitude of vibration, and greatly improves the reliability of use.

[0027] Other additional advantages and beneficial effects of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the isometric structure of the fixed sleeve in this utility model;

[0031] Figure 3 This is a schematic diagram of the isometric structure of the rubber sleeve in this utility model;

[0032] Figure 4 This is a schematic diagram of the isometric structure of the mounting bracket in this utility model.

[0033] In the diagram: 1. Oil shut-off solenoid valve body; 2. Mounting bracket; 21. Mounting hole; 22. Angle support plate; 3. Fixing sleeve; 31. Arc-shaped steel ring; 32. Fixing plate No. 1; 33. Fixing plate No. 2; 331. Notch; 34. Rotating screw; 35. Wing nut; 36. Threaded rod; 361. Limiting ring; 37. Locking nut; 38. Rubber sleeve; 381. Positioning convex ring. Detailed Implementation

[0034] 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.

[0035] Please see Figures 1-4 The present invention provides the following technical solution: a pressure feedback type oil cut-off solenoid valve assembly, including an oil cut-off solenoid valve body 1 and an "L"-shaped mounting bracket 2. The oil cut-off solenoid valve body 1 is fixed on the oil pump through the mounting bracket 2, and a mounting hole 21 is provided on the mounting bracket 2. It further includes a fixing sleeve 3, and the oil cut-off solenoid valve body 1 is fixed on the mounting bracket 2 through the fixing sleeve 3. The fixing sleeve 3 includes: an arc-shaped steel ring 31, a flip screw 34, and a wing nut 35.

[0036] Furthermore, by Figure 1 and Figure 2 As shown, in this embodiment, the arc-shaped steel ring 31 is fitted onto the oil cut-off solenoid valve body 1 and fixedly connected to the mounting bracket 2. A first fixing plate 32 and a second fixing plate 33 are fixed at both ends of the arc-shaped steel ring 31, respectively. The flip screw 34 is hinged to the first fixing plate 32. A notch 331 for the flip screw 34 to pass through is provided on the second fixing plate 33. The wing nut 35 is installed on the protruding end of the flip screw 34 by thread engagement. With the above scheme, when it is necessary to fix the oil cut-off solenoid valve body 1 onto the mounting bracket 2, the mounting bracket 2 is first fixed onto the oil pump, then the fixing sleeve 3 is fixed onto the mounting bracket 2, and then the arc-shaped steel ring 31 is fitted onto the oil cut-off solenoid valve body 1.

[0037] Since the flip screw 34 is hinged to the first fixing plate 32, the flip screw 34 can be rotated around the hinge point so that it is aligned with the notch 331 on the second fixing plate 33 and passes through the notch 331.

[0038] Next, the wing nut 35 is screwed onto the extended end of the flip screw 34. Then, the wing nut 35 is rotated clockwise. As the wing nut 35 is tightened, a pulling force is generated on the flip screw 34 towards the extended end. This pulling force is transmitted to the first fixing piece 32 through the flip screw 34. Since the first fixing piece 32 and the second fixing piece 33 are respectively fixed at both ends of the arc-shaped steel ring 31, the arc-shaped steel ring 31 is subjected to a pulling force towards the middle at both ends, thereby making the arc-shaped steel ring 31 tightly fit onto the oil cut-off solenoid valve body 1, and firmly fixing the oil cut-off solenoid valve body 1 on the mounting bracket 2.

[0039] The wing nut 35 is connected to the rotating screw 34 by thread engagement. During the pressure feedback process, the self-locking property of the thread can maintain the tension on the rotating screw 34, ensuring that the arc steel ring 31 always tightly fixes the oil cut-off solenoid valve body 1 and will not loosen due to pressure changes. This ensures that the entire oil cut-off solenoid valve assembly works stably and reliably under pressure feedback, and achieves precise control of the oil pump circuit.

[0040] This utility model achieves quick locking and disassembly through the cooperation of the wing nut 35 and the flip screw 34, which is more efficient than traditional screw fixing. At the same time, it is more stable than the snap-fit ​​installation structure of the existing technology, reduces the amplitude of vibration, and greatly improves the reliability of use.

[0041] Preferably, by Figure 1 As shown in this embodiment, the oil shut-off solenoid valve body 1 is fixed to the mounting bracket 2 by two sets of spaced fixing sleeves 3. With the above scheme, when in use, the two sets of fixing sleeves 3 are arranged at intervals along the axial direction of the oil shut-off solenoid valve body 1 and are symmetrically distributed on both sides of the center of gravity of the oil shut-off solenoid valve body 1 to form a two-point positioning support structure. The circumferential design of the arc-shaped steel ring 31, combined with the spaced layout, can evenly distribute the dynamic loads such as high-frequency vibration and hydraulic impact force during the operation of the oil pump to different stress areas of the mounting bracket 2, avoiding local stress concentration caused by single-point fixing.

[0042] Preferably, by Figure 1 and Figure 2 As shown in this embodiment, the fixing sleeve 3 includes two spaced arc-shaped steel rings 31. With the above solution, when in use, the two arc-shaped steel rings 31 are spaced apart along the axial direction of the oil cut-off solenoid valve body 1 to form a double-ring flexible constraint structure. When the arc surface of the arc-shaped steel ring 31 is in contact with the outer surface of the oil cut-off solenoid valve body 1, the contact stress can be evenly distributed in the circumferential direction, avoiding local indentation or wear caused by the eccentric clamping force of the single arc-shaped steel ring 31.

[0043] Preferably, by Figure 1 and Figure 2 As shown in this embodiment, the fixing sleeve 3 further includes a threaded rod 36 and a locking nut 37. The threaded rod 36 is fixed to the outer wall of the arc-shaped steel ring 31 and passes through the mounting frame 2. A limit ring 361 is fixed on the threaded rod 36. The locking nut 37 is installed on the protruding end of the threaded rod 36 by thread engagement. With the above solution, when fixing the fixing sleeve 3 to the mounting frame 2, the threaded rod 36 is first passed through the mounting frame 2, and then the locking nut 37 is tightened at the protruding end of the threaded rod 36. The locking nut 37 and the limit ring 361 are used to clamp the mounting frame 2, thereby achieving a stable connection between the fixing sleeve 3 and the mounting frame 2.

[0044] When it is necessary to remove the fixing sleeve 3, simply unscrew the locking nut 37; there is no need to remove the mounting bracket 2.

[0045] Because the oil shut-off solenoid valve body 1 is fixed to the mounting bracket 2 by two sets of spaced fixed sleeves 3, there are also two threaded rods 36, which are fixedly connected to the top and bottom of the mounting bracket 2 respectively. This ensures high stability, avoids accidental rotation of the oil shut-off solenoid valve body 1, and significantly reduces the positioning time. It is only necessary to ensure that the threaded rod 36 can pass through the hole on the mounting bracket 2.

[0046] Preferably, by Figure 1 and Figure 2 As shown in this embodiment, the fixing sleeve 3 further includes a rubber sleeve 38, which is located inside the arc-shaped steel ring 31. With the above solution, when in use, the rubber sleeve 38 is located inside the arc-shaped steel ring 31 and directly contacts the oil cut-off solenoid valve body 1. Its excellent elastic properties can effectively buffer and absorb the high-frequency vibration and impact from the oil pump. During the operation of the oil pump, continuous mechanical vibration and hydraulic pulsation will be generated. The elastic deformation of the rubber sleeve 38 can convert these vibration energies into internal energy and dissipate them, avoiding the vibration from being directly transmitted to the oil cut-off solenoid valve body 1.

[0047] In addition, after the arc-shaped steel ring 31 is tightened, it will compress the rubber sleeve 38, and the rubber sleeve 38 will produce elastic deformation, which has a better anti-slip effect and can further improve the stability of the installation of the oil cut-off solenoid valve body 1.

[0048] Preferably, by Figures 1-3 As shown, this embodiment further includes a positioning protrusion ring 381, which is integrally formed on the outer wall of the rubber sleeve 38 and embedded in the inner space of the two arc-shaped steel rings 31. With the above solution, when in use, after the positioning protrusion ring 381 is embedded in the inner space of the two arc-shaped steel rings 31, it forms an "embedded engagement" structure with the arc-shaped steel rings 31, which significantly enhances the connection strength between the rubber sleeve 38 and the arc-shaped steel rings 31.

[0049] During the operation of the oil pump, when the body of the oil shut-off solenoid valve 1 is subjected to vibration, impact or pressure change, the positioning convex ring 381 can effectively disperse these external forces and prevent the rubber sleeve 38 from sliding or displacing within the arc-shaped steel ring 31.

[0050] Preferably, by Figure 1 and Figure 4 As shown, in this embodiment, it further includes: a corner brace 22, which is welded and fixed to the inner side of the included angle of the mounting frame 2. After adopting the above solution, the design of the corner brace 22 further improves the structural stability of the mounting frame 2 during use, and avoids deformation caused by local stress concentration.

[0051] Preferably, by Figure 1 and Figure 2 As shown in this embodiment, the threaded rod 36 is welded and fixed to the outer wall of the arc-shaped steel ring 31, and the first fixing piece 32 and the second fixing piece 33 are welded and fixed to the inner side of the two arc-shaped steel rings 31, resulting in high structural strength.

[0052] Components not described in detail in this article are existing technologies.

[0053] The working principle and usage process of this utility model: When using the oil shut-off solenoid valve body 1, when it is necessary to fix the oil shut-off solenoid valve body 1 on the mounting bracket 2, first fix the mounting bracket 2 on the oil pump, then fix the fixing sleeve 3 on the mounting bracket 2, and then put the arc-shaped steel ring 31 on the oil shut-off solenoid valve body 1.

[0054] Since the flip screw 34 is hinged to the first fixing plate 32, the flip screw 34 can be rotated around the hinge point so that it is aligned with the notch 331 on the second fixing plate 33 and passes through the notch 331.

[0055] Next, the wing nut 35 is installed on the extended end of the flip screw 34 by screwing it in. Then, the wing nut 35 is rotated clockwise. As the wing nut 35 is tightened, a pulling force is generated on the flip screw 34 in the direction of the extended end. This pulling force is transmitted to the first fixing piece 32 through the flip screw 34. Since the first fixing piece 32 and the second fixing piece 33 are respectively fixed at both ends of the arc-shaped steel ring 31, the two ends of the arc-shaped steel ring 31 are subjected to a pulling force towards the middle, thereby making the arc-shaped steel ring 31 tightly fit on the oil cut-off solenoid valve body 1, and firmly fixing the oil cut-off solenoid valve body 1 on the mounting bracket 2.

[0056] The wing nut 35 is connected to the flip screw 34 by thread engagement. During the pressure feedback process, the self-locking property of the thread can maintain the tension on the flip screw 34, ensuring that the arc steel ring 31 always tightly fixes the oil cut-off solenoid valve body 1 and will not loosen due to pressure changes. This ensures that the entire oil cut-off solenoid valve assembly works stably and reliably under pressure feedback, and achieves precise control of the oil pump circuit.

[0057] This utility model achieves quick locking and disassembly through the cooperation of the wing nut 35 and the flip screw 34, which is more efficient than traditional screw fixing. At the same time, it is more stable than the snap-fit ​​installation structure of the existing technology, reduces the amplitude of vibration, and greatly improves the reliability of use.

[0058] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 pressure feedback type cut-off solenoid valve assembly, comprising a cut-off solenoid valve body (1) and an "L" type mounting bracket (2), the cut-off solenoid valve body (1) is fixed on an oil pump through the mounting bracket (2), and a mounting hole (21) is formed on the mounting bracket (2), characterized in that, Further comprising a fixing sleeve (3), the oil cut-off electromagnetic valve body (1) is fixed on the mounting frame (2) through the fixing sleeve (3), wherein the fixing sleeve (3) comprises: An arc-shaped steel ring (31) is sleeved on the oil cut-off electromagnetic valve body (1) and fixedly connected with the mounting frame (2), and a first fixing plate (32) and a second fixing plate (33) are respectively fixed at both ends of the arc-shaped steel ring (31); A turnover screw rod (34) is hinged to the first fixing plate (32), and a notch (331) is formed in the second fixing plate (33) for the turnover screw rod (34) to pass through; A butterfly nut (35) is installed on the extended end of the turnover screw rod (34) by screwing.

2. The pressure feedback fuel shutoff solenoid valve assembly of claim 1, wherein: The oil cut-off electromagnetic valve body (1) is fixed on the mounting frame (2) by two groups of interval distributed fixing sleeves (3).

3. The pressure feedback fuel shutoff solenoid valve assembly of claim 1, wherein: The fixing sleeve (3) comprises two interval distributed arc-shaped steel rings (31).

4. The pressure feedback fuel shutoff solenoid valve assembly of claim 1, wherein: The fixing sleeve (3) further comprises: A threaded rod (36) is fixed on the outer wall of the arc-shaped steel ring (31) and penetrates the mounting frame (2), and a limiting ring (361) is fixed on the threaded rod (36); A locking nut (37) is installed on the extended end of the threaded rod (36) by screwing.

5. The pressure feedback fuel shutoff solenoid valve assembly of claim 1, wherein: The fixing sleeve (3) further comprises: A rubber sleeve (38) is located inside the arc-shaped steel ring (31).

6. The pressure feedback fuel shutoff solenoid valve assembly of claim 5, wherein: Further comprising: A positioning convex ring (381) is integrally formed on the outer wall of the rubber sleeve (38), which is embedded in the inner space of the two arc-shaped steel rings (31).

7. The pressure feedback fuel shutoff solenoid valve assembly of claim 1, wherein: Further comprising: An angle support plate (22) is welded and fixed on the inner side of the included angle of the mounting frame (2).

8. The pressure feedback fuel shutoff solenoid valve assembly of claim 4, wherein: The threaded rod (36) is welded and fixed on the outer wall of the arc-shaped steel ring (31), and the first fixing plate (32) and the second fixing plate (33) are welded and fixed on the inner side of the two arc-shaped steel rings (31).

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