Integrated, easy-to-maintain fuel metering valve

Abstract

The application belongs to the technical field of metering pump, and discloses an integrated fuel metering valve easy to maintain. The integrated fuel metering valve easy to maintain comprises a top-open shell, a through hole is formed in the middle of the bottom wall of the shell, an internal thread is arranged at the bottom end of the inner wall of the shell, a valve body is arranged in the shell, the valve body comprises a positioning ring, the external thread on the outer side of the positioning ring is matched with the internal thread to form the connection with the shell, a valve seat is arranged on the lower surface of the positioning ring, a valve core is arranged in the valve seat, and the valve seat extends to the lower side of the shell through the through hole. The integrated fuel metering valve easy to maintain is designed by matching the positioning ring and the cover plate, the disassembly and assembly of the metering valve can be quickly completed, the assembly production of the metering valve can be completed on the same assembly line, the fixing structure is simple and reliable, compared with the welding and stamping packaging methods adopted at present, the metering valve can be disassembled and assembled multiple times without affecting the performance of the metering valve, and the problems in the background technology are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metering pumps, in particular to an integrated fuel metering valve easy to maintain. BACKGROUND

[0002] The fuel metering valve is installed at the oil inlet position of the high-pressure oil pump, used for adjusting the fuel supply amount and fuel pressure, and its structure generally comprises: an electromagnetic operating assembly and a regulating valve driven by the electromagnetic operating assembly, the valve housing of the regulating valve has an annular channel, and an inlet hole is formed in the annular channel and communicates with the annular channel, the valve piston is tubular, the inner cavity of the valve piston is oil passage, and a throttle hole is formed in the circumference of the valve piston and communicates with the inner cavity, such a structure makes fuel output from the outlet of the front-stage delivery pump of the system, flow into the inner cavity of the valve piston through the inlet hole and the annular channel of the valve housing, and the valve piston moves in the valve housing under the drive of the electromagnetic operating assembly to change the flow area (oil inlet cross-sectional area) of the throttle hole, thereby increasing or reducing the oil amount.

[0003] The existing fuel metering valve usually needs to be assembled in advance on two production lines, and then the two components are welded or stamped and packaged into products in the assembly workshop, so the overall structure is complex, and the welding or stamping structure is not conducive to later maintenance, therefore, the present application provides an integrated fuel metering valve easy to maintain. SUMMARY

[0004] The present application provides an integrated fuel metering valve easy to maintain, which has integrated overall structure, is easy to disassemble, and has parts easy to replace and maintain, thereby solving the problems in the background art.

[0005] To achieve the above object, the present application is implemented by the following technical scheme: an integrated fuel metering valve easy to maintain, comprising a top-opened housing, a through hole is formed in the middle of the bottom wall of the housing, and an internal thread is arranged at the bottom end of the inner wall of the housing.

[0006] A valve body is arranged in the housing, the valve body comprises a positioning ring, the external thread of the outer side of the positioning ring is matched with the internal thread to form a connection with the housing, a valve seat is arranged on the lower surface of the positioning ring, and a valve core is arranged in the valve seat, the valve seat extends to the lower side of the housing through the through hole, and a lower pole shoe is fixedly connected to the upper surface of the positioning ring.

[0007] A coil framework is also arranged in the housing, an electromagnetic coil is arranged on the periphery of the coil framework, an upper pole shoe is fixedly connected to the top of the lower pole shoe through a connecting pipe, an armature column is inserted between the upper pole shoe and the lower pole shoe, a top rod is inserted into the middle of the armature column, the bottom end of the top rod extends to the valve seat through the lower pole shoe and the positioning ring, and the bottom end of the top rod is in contact with the top of the valve core.

[0008] A cover plate is inserted into the top opening of the shell, and four circularly arranged arc grooves are provided on the upper surface of the positioning ring. The two ends of the arc groove are fixedly connected by an arc rod, and a connecting ring is sleeved on the arc rod. A guide groove is provided on the inner wall of the shell corresponding to the position of the connecting ring, and a fastening hook is fixedly connected to the outer side of the connecting ring. The four fastening hooks are respectively located in the four guide grooves, and a hanging groove is provided at the position of the top of the cover edge corresponding to the guide groove, and the top hook of the fastening hook is inserted into the hanging groove.

[0009] Preferably, the center of the arc groove coincides with the axis of the positioning ring.

[0010] Preferably, two slots are provided on the lower surface of the cover plate at positions corresponding to the coil skeleton, and insertion rods are fixedly connected to positions of the coil skeleton corresponding to the slots, and the two insertion rods are respectively inserted into the two slots.

[0011] Preferably, a rubber sealing ring is bonded to the edge of the cover plate, and a rubber sealing pad is bonded to the bottom wall of the guide groove.

[0012] Preferably, the bottom wall of the shell is provided with positioning holes on both the left and right sides of the valve seat, and the upper surface of the positioning ring is provided with two symmetrical fixing holes. When the positioning ring is rotated until its lower surface contacts the bottom wall of the shell, the positioning hole and the fixing hole are opposite.

[0013] Preferably, a filter ring is sleeved on the outer side of the valve seat, and a positioning rod is fixedly connected to the top of the filter ring at a position corresponding to the positioning hole. The positioning rod passes through the positioning hole and is inserted into the fixing hole to fix the position of the positioning ring.

[0014] By adopting the above technical solution, the beneficial effects of the present invention are:

[0015] This integrated and easy-to-maintain fuel metering valve can quickly complete the disassembly and assembly of the metering valve through the coordinated design of the positioning ring and the cover plate. The assembly and production of the metering valve can be completed on the same production line. At the same time, the fixing structure is simple and reliable. Compared with the current packaging methods of welding and stamping, it can be disassembled and assembled multiple times without affecting the performance of the metering valve, solving the problems raised in the background technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front cross-sectional view of the present invention;

[0017] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 For the present invention Figure 1 Enlarged view of point B in the middle;

[0019] Figure 4 For the present invention Figure 1 Enlarged view of point C in the middle;

[0020] Figure 5 The top view of the positioning ring of the application.

[0021] In the figure: 1 shell, 2 perforation, 3 valve body, 31 positioning ring, 32 valve seat, 33 valve core, 34 lower pole shoe, 4 coil framework, 5 electromagnetic coil, 6 connecting pipe, 7 upper pole shoe, 8 armature column, 9 top rod, 10 cover plate, 11 arc-shaped slot, 12 arc-shaped rod, 13 connecting ring, 14 guide slot, 15 fastening hook, 16 hanging slot, 17 insertion slot, 18 insertion rod, 19 rubber sealing ring, 20 rubber sealing gasket, 21 positioning hole, 22 fixing hole, 23 filter ring, 24 positioning rod, 25 terminal. DETAILED DESCRIPTION

[0022] Please refer to Figures 1-5 The application provides a technical solution: an integrated easy-to-maintain fuel metering valve, comprising a top-open shell 1, a perforation 2 is formed in the middle of the bottom wall of the shell 1, and an internal thread is arranged at the bottom end of the inner wall of the shell 1.

[0023] A valve body 3 is arranged in the shell 1, the valve body 3 comprises a positioning ring 31, the outer thread of the outer side of the positioning ring 31 is matched with the internal thread to form a connection with the shell 1, a valve seat 32 is arranged on the lower surface of the positioning ring 31, and a valve core 33 is arranged in the valve seat 32, the valve seat 32 extends to the lower side of the shell 1 through the perforation 2, and the upper surface of the positioning ring 31 is fixedly connected with a lower pole shoe 34.

[0024] A coil framework 4 is also arranged in the shell 1, the bottom of the coil framework 4 is in contact with the protrusion of the side wall of the shell 1 to be supported and form a limit, an electromagnetic coil 5 is arranged on the periphery of the coil framework 4, the top of the lower pole shoe 34 is fixedly connected with an upper pole shoe 7 through a connecting pipe 6, the upper pole shoe 7 and the lower pole shoe 34 are inserted with an armature column 8, the middle of the armature column 8 is inserted with a top rod 9, the bottom end of the top rod 9 extends to the valve seat 32 through the lower pole shoe 34 and the positioning ring 31, and the bottom end of the top rod 9 is in contact with the top of the valve core 33.

[0025] A cover plate 10 is inserted into the top opening of the shell 1, four arc-shaped slots 11 are arranged on the upper surface of the positioning ring 31 in a ring shape, the two ends of the arc-shaped slots 11 are fixedly connected through arc-shaped rods 12, a connecting ring 13 is sleeved on the arc-shaped rods 12, guide slots 14 are formed in the inner wall of the shell 1 corresponding to the positions of the connecting ring 13, fastening hooks 15 are fixedly connected to the outer side of the connecting ring 13, the four fastening hooks 15 are respectively in the four guide slots 14, hanging slots 16 are formed in the top of the edge of the cover plate 10 corresponding to the positions of the guide slots 14, and the top ends of the fastening hooks 15 are inserted into the hanging slots 16.

[0026] The top end of the fastening hook 15 is designed in a U shape corresponding to the depth of the hanging groove 16. After the fastening hook 15 is inserted into the hanging groove 16, the top end of the fastening hook 15 is flush with the upper surface of the cover plate 10, ensuring the appearance of the metering valve.

[0027] The center of the arc-shaped groove 11 coincides with the axis of the positioning ring 31.

[0028] Two insertion grooves 17 are formed on the lower surface of the cover plate 10 corresponding to the position of the coil former 4. The coil former 4 is fixedly connected with an insertion rod 18 corresponding to the position of the insertion groove 17. The two insertion rods 18 are respectively inserted into the two insertion grooves 17.

[0029] When the cover plate 10 is fixed in the shell 1, the bottom can press on the insertion rod 18, ensuring the stable position of the coil former 4 and avoiding displacement during use of the metering valve.

[0030] A rubber sealing ring 19 is bonded to the edge of the cover plate 10, and a rubber sealing gasket 20 is bonded to the bottom wall of the guide groove 14. The upper surface of the cover plate 10 is provided with a terminal 25 which is electrically connected with the electromagnetic coil 5 through the insertion groove 17.

[0031] The design of the rubber sealing ring 19 and the rubber sealing gasket 20 can enhance the sealing between the cover plate 10 and the fastening hook 15 and the shell, ensuring the overall structure of the metering valve to be closed and stable, and avoiding foreign matter from entering the shell to affect the stable work of the metering valve.

[0032] Positioning holes 21 are formed on the bottom wall of the shell 1 and on both sides of the valve seat 32. Two symmetrical fixing holes 22 are formed on the upper surface of the positioning ring 31. When the positioning ring 31 is rotated to the state that the lower surface thereof is in contact with the bottom wall of the shell 1, the positioning holes 21 and the fixing holes 22 are opposite.

[0033] The design of the positioning holes 21 and the fixing holes 22 can help the installer to determine that the positioning ring 31 is installed in place, ensuring the completion of the installation of the metering valve.

[0034] A filter ring 23 is sleeved on the outer side of the valve seat 32. A positioning rod 24 is fixedly connected to the top end of the filter ring 23 corresponding to the position of the positioning hole 21. The positioning rod 24 is inserted into the fixing hole 22 through the positioning hole 21 to fix the position of the positioning ring 31.

[0035] By using the insertion design of the positioning rod 24 and the fixing hole 22, the position of the positioning ring 32 can be fixed, avoiding the loosening of the cover plate 10 due to displacement during use of the metering valve, and the overall structure is compact and reasonable.

[0036] When the integrated fuel metering valve needs to be disassembled for maintenance, the filter ring 23 is removed, the valve seat 32 is rotated to move it into the housing 1, and the connecting ring 13 moves on the arc-shaped rod 12, causing the fastening hook to move upward, loosening the cover plate 10 so that it can be removed. The cover plate 10 is removed, and the metering valve components in the housing 1 can be operated. The components that need to be replaced can be directly replaced. After the maintenance is completed, the cover plate 10 is covered, the fastening hook 15 is hung in the hanging groove 16, the valve seat 32 is rotated, the fastening hook 15 pulls the cover plate 10 downward to press it tightly at the opening of the housing 1, and then the filter ring 23 is installed, with the positioning rod 24 inserted into the fixing hole 22.

[0037] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application, and various modifications to these embodiments will be apparent to those of ordinary skill in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the present application will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated, maintenance-friendly fuel metering valve comprising a housing (1) open at the top, a through-hole (2) being provided in the middle of the bottom wall of the housing (1), characterized in that: The bottom end of the inner wall of the shell (1) is provided with an internal thread; The shell (1) is provided with a valve body (3) inside, the valve body (3) comprises a positioning ring (31), the outer thread on the outer side of the positioning ring (31) is matched with the internal thread to form the connection with the shell (1), the lower surface of the positioning ring (31) is provided with a valve seat (32), and the valve seat (32) is provided with a valve core (33) inside, the valve seat (32) extends to the lower side of the shell (1) through the through hole (2), and the upper surface of the positioning ring (31) is fixedly connected with a lower pole shoe (34); The shell (1) is also placed with a coil framework (4) inside, the outer periphery of the coil framework (4) is provided with an electromagnetic coil (5), the top of the lower pole shoe (34) is fixedly connected with an upper pole shoe (7) through a connecting pipe (6), the upper pole shoe (7) and the lower pole shoe (34) are inserted with an armature column (8), the middle part of the armature column (8) is inserted with a top rod (9), the bottom end of the top rod (9) extends to the valve seat (32) through the lower pole shoe (34) and the positioning ring (31), and the bottom end of the top rod (9) is in contact with the top of the valve core (33); The top opening of the shell (1) is inserted with a cover plate (10), the upper surface of the positioning ring (31) is provided with four arc-shaped grooves (11) arranged in a ring shape, the two ends of the arc-shaped groove (11) are fixedly connected through an arc-shaped rod (12), the arc-shaped rod (12) is sleeved with a connecting ring (13), the inner wall of the shell (1) is provided with a guide groove (14) at the position corresponding to the connecting ring (13), the outer side of the connecting ring (13) is fixedly connected with a fastening hook (15), the four fastening hooks (15) are respectively located in the four guide grooves (14), and the edge top of the cover plate (10) is provided with a hanging groove (16) at the position corresponding to the guide groove (14), and the top end of the fastening hook (15) is inserted into the hanging groove (16).

2. The integrated, maintenance-friendly fuel metering valve according to claim 1, characterized in that: The center of the arc-shaped groove (11) coincides with the axis of the positioning ring (31).

3. The integrated, maintenance-friendly fuel metering valve of claim 2, wherein: The lower surface of the cover plate (10) is provided with two insertion grooves (17) at the position corresponding to the coil framework (4), and the coil framework (4) is fixedly connected with an insertion rod (18) at the position corresponding to the insertion groove (17), and the two insertion rods (18) are respectively inserted into the two insertion grooves (17).

4. An integrated, maintenance friendly fuel metering valve according to claim 3, characterized in that: The edge of the cover plate (10) is bonded with a rubber sealing ring (19), and the bottom wall of the guide groove (14) is bonded with a rubber sealing gasket (20).

5. The integrated, maintenance-friendly fuel metering valve of claim 4, wherein: The bottom wall of the shell (1) and the left and right sides of the valve seat (32) are provided with positioning holes (21), and the upper surface of the positioning ring (31) is provided with two symmetrical fixing holes (22), when the lower surface of the positioning ring (31) is in contact with the bottom wall of the shell (1), the positioning holes (21) and the fixing holes (22) are opposite.

6. The integrated maintenance friendly fuel metering valve of claim 5, wherein: The outer side of the valve seat (32) is sleeved with a filter ring (23), the top end of the filter ring (23) is fixedly connected with a positioning rod (24) at the position corresponding to the positioning hole (21), and the positioning rod (24) is inserted into the fixing hole (22) through the positioning hole (21) to fix the position of the positioning ring (31).

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