A floating solenoid valve

Abstract

This utility model discloses a floating solenoid valve, comprising a main valve sleeve, a connecting sleeve, and a spool valve core. The spool valve core is located inside the main valve sleeve and is coaxially arranged with it. A connecting rod is fixed to the upper part of the spool valve core by a cylindrical pin. The spool valve core and the cylindrical pin are clearance-fitted, while the cylindrical pin and the connecting rod are interference-fitted. The connecting rod extends out of the main valve sleeve, and the main valve sleeve and the connecting sleeve are fixed by a wire retainer. The top of the connecting rod is installed inside the connecting sleeve, and a gasket is fitted on the connecting rod. A bushing is installed on the gasket, and the bottom surface of the bushing presses the gasket tightly against the top surface of the main valve sleeve. The top surface of the bushing abuts against the inner surface of the connecting sleeve. A spring seat is provided at the top of the connecting rod installed inside the connecting sleeve, and a spring wound around the connecting rod is located inside the spring seat. A magnetic tube assembly is provided on the top surface of the connecting sleeve, and a locking nut is provided at the top of the magnetic tube assembly. This utility model not only facilitates the installation of the solenoid valve and improves production efficiency, but also reduces valve jamming and greatly improves the performance of the solenoid valve.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic system technology, and specifically relates to a floating solenoid valve. Background Technology

[0002] like Figure 1 The diagram shows the basic structure of a conventional electromagnetic spool valve. It includes a main valve sleeve 1, a spool valve core 2, a cylindrical pin 3 / 5, a connecting rod 4, a connecting sleeve 6, an armature 7, a spring 8, a magnetic tube assembly 9, a locking nut 10, and a sealing element. This electromagnetic spool valve achieves its function by moving the spool valve core 2 using electromagnetic force. It requires a high degree of concentricity between the parts; otherwise, it is very easy for the main valve sleeve 1 and the spool valve core 2 to jam. Furthermore, the coaxiality of the main valve sleeve and the spool valve core is also crucial. This is mainly because the main valve sleeve 1 and the connecting sleeve 5 in conventional electromagnetic spool valves are connected by threads, requiring a high degree of concentricity between them. Otherwise, the main valve sleeve 1 will tilt, significantly increasing the probability of jamming with the spool valve core 2, and also affecting the opening and cover of the electromagnetic valve. If the electromagnetic valve with the main valve sleeve 1 tilted is inserted into the socket, it will also cause the electromagnetic valve to become stuck, resulting in jamming. These types of valves with threaded connections require torque to be applied at the connection point to make the connection more secure; otherwise, they may come loose during use. However, it is difficult to apply torque to these valves, and high-precision tooling is required. Otherwise, the main valve sleeve 1 will be squeezed and deformed, thus affecting the valve's performance. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by providing a floating solenoid valve, which not only facilitates the installation of the solenoid cone valve and improves production efficiency, but also reduces valve jamming in the solenoid slide valve and greatly improves its performance.

[0004] The technical solution adopted in this utility model is as follows: A floating solenoid valve includes a main valve sleeve, a connecting sleeve, and a spool valve core. The spool valve core is disposed inside the main valve sleeve and is coaxially arranged with the main valve sleeve. A connecting rod is fixed to the upper part of the spool valve core by a cylindrical pin. The spool valve core and the cylindrical pin are clearance-fitted, and the cylindrical pin and the connecting rod are interference-fitted. The connecting rod extends out of the main valve sleeve. The main valve sleeve and the connecting sleeve are fixed by a wire retainer. The top of the connecting rod is installed inside the connecting sleeve. A gasket is fitted on the connecting rod, and a bushing is installed on the gasket. The bottom surface of the bushing presses the gasket tightly against the top surface of the main valve sleeve, and the top surface of the bushing abuts against the inner surface of the connecting sleeve. A spring seat is provided on the top of the connecting rod installed inside the connecting sleeve. A spring wound around the connecting rod is provided in the spring seat. One end of the spring is fixed to the spring seat, and the other end of the spring is fixed to the upper surface of the gasket. A magnetic tube assembly is provided on the top surface of the connecting sleeve, and a locking nut is provided on the top of the magnetic tube assembly.

[0005] Preferably, the lower part of the inner wall of the connecting sleeve is provided with a wire retaining ring groove for installing a wire retaining ring, and the cross-section of the wire retaining ring groove is circular.

[0006] Preferably, an inclined ring is provided at the connection between the top surface of the steel wire retaining ring groove and the main valve sleeve, and the top of the inclined ring is inclined inward from the edge.

[0007] Preferably, the diameter of the wire retaining ring is larger than the diameter of the groove of the wire retaining ring.

[0008] Preferably, the upper part of the outer wall of the main valve sleeve is provided with an auxiliary steel wire retaining ring installation groove.

[0009] Preferably, an O-ring groove for placing O-rings is provided on the upper part of the outer wall of the main valve sleeve and above the auxiliary wire retaining ring mounting groove.

[0010] Preferably, the magnetic tube assembly is connected to the top of the connecting rod installed inside the connecting sleeve via a push rod.

[0011] The beneficial effects of this utility model are as follows: (1) This utility model changes the connection method between the main valve sleeve and the connecting sleeve from threaded connection to wire snap ring connection. This connection method has no limitations and can make the installation between the main valve sleeve and the connecting sleeve more convenient and perform better. (2) This utility model utilizes the structure of the connecting rod and the matching relationship between it and the spool and the cylindrical pin to make the three parts closer together. The clearance matching between the spool and the cylindrical pin can make the spool better adapt to the matching relationship with the main valve sleeve, and further improve the performance of the solenoid valve. (3) In order to limit the excessive movement of the main valve sleeve, the present invention adds a bushing to limit the movement of the main valve sleeve, and the movement amount is improved from 30-40 mil to 5-10 mil, which is beneficial to improving the performance of the solenoid valve. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the structure of a solenoid valve in the prior art; Figure 2 This is a cross-sectional view of the structure of this utility model; Figure 3 This is a schematic diagram of the main valve sleeve in this utility model; Figure 4 This is a schematic diagram of the steel wire retaining ring groove in this utility model; Figure 5 This is a schematic diagram of the structure in this utility model where the connecting rod is mounted on the slide valve core; In the diagram: 1. Main valve sleeve; 2. Spool valve core; 3. Wire retaining ring; 4. Cylindrical pin; 5. Connecting rod; 6. Gasket; 7. Bushing; 8. Spring; 9. Spring seat; 10. Connecting sleeve; 11. Magnetic tube assembly; 12. Locking nut; 13. Wire retaining ring groove; 14. Inclined ring; 15. Auxiliary wire retaining ring mounting groove. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings: like Figure 2-5 As shown, the present invention discloses a floating solenoid valve including a main valve sleeve 1, a connecting sleeve 10, and a spool valve core 2. The spool valve core 2 is disposed inside the main valve sleeve 1 and is coaxially disposed with the main valve sleeve 1. A connecting rod 5 is fixed to the upper part of the spool valve core 2 by a cylindrical pin 4. The spool valve core 2 and the cylindrical pin 4 are clearance-fitted, and the cylindrical pin 4 and the connecting rod 5 are interference-fitted. The connecting rod 5 extends out of the main valve sleeve 1. This assembly is relatively simple and can also provide slight axial movement for the spool valve core 2 to further improve the valve performance.

[0014] In this invention, the main valve sleeve 1 and the connecting sleeve 10 are fixed together by a wire retaining ring 3. The lower part of the inner wall of the connecting sleeve 10 has a wire retaining ring groove 13 for mounting the wire retaining ring 3, and the upper part of the outer wall of the main valve sleeve 1 has an auxiliary wire retaining ring mounting groove 15. The cross-section of the wire retaining ring groove 13 is circular. The circular groove 13 has a large contact area with the wire retaining ring 3, resulting in relatively small movement and thus relative stability. When the main valve sleeve 1 and the connecting sleeve 10 are assembled, the wire retaining ring 3 needs to be subjected to an inward force from the connecting sleeve 10. Therefore, the diameter of the wire retaining ring 3 is larger than the diameter of the wire retaining ring groove 13, ensuring a tight fit between the wire retaining ring 3 and the groove 13.

[0015] After the main valve sleeve 1 and the connecting sleeve 10 are fixed by the wire retainer 3, although the wire retainer 3 is installed tightly, there will still be some movement. Slight movement can allow the solenoid valve to adapt to a more reasonable position during operation. During the design and manufacturing process, the fit clearance between the two is controlled to provide a certain amount of movement. Precise control of the clearance can effectively improve the performance of the solenoid valve. However, this structure affects the sealing and leakage of the solenoid valve. In order to improve the sealing effect, an O-ring groove for placing O-rings is provided on the upper part of the outer wall of the main valve sleeve 1 and above the auxiliary installation wire retainer groove 15. This can reduce the leakage of the solenoid valve and achieve sealing.

[0016] In this invention, the top surface of the wire retaining groove 13 is provided with an inclined ring 14 at the connection between it and the main valve sleeve 1. The top of the inclined ring 14 is inclined inward from the edge. When the main valve sleeve 1 and the connecting sleeve 10 are assembled, the O-ring will pass through the wire retaining groove 13 on the connecting sleeve 10, which can easily cause the O-ring to be cut. The inclined ring 14 can make the O-ring slide out of the wire retaining groove 13 quickly, avoiding damage to the O-ring and thus increasing the leakage.

[0017] In this invention, the top of the connecting rod 5 is installed inside the connecting sleeve 10. A gasket 6 is fitted on the connecting rod 5, and a bushing 7 is installed on the gasket 6. The bottom surface of the bushing 7 presses the gasket 6 tightly against the top surface of the main valve sleeve 1 to prevent the main valve sleeve 1 from moving. The top surface of the bushing 7 abuts against the inner surface of the connecting sleeve 10. After adding the bushing 7, the movement of the main valve sleeve 1 is restricted, and the amount of movement is improved from 30-40 microns to 5-10 microns, which is beneficial to improving the performance of the solenoid valve.

[0018] In this invention, the connecting rod 5 installed inside the connecting sleeve 10 has a spring seat 9 at its top. A spring 8 is wound around the connecting rod 5 inside the spring seat 9. One end of the spring 8 is fixed to the spring seat 9, and the other end is fixed to the upper surface of the gasket 6. A magnetic tube assembly 11 is provided on the top surface of the connecting sleeve 10. The magnetic tube assembly 11 is connected to the top of the connecting rod 5 installed inside the connecting sleeve 10 via a push rod. A locking nut 12 is provided on the top of the magnetic tube assembly 11.

[0019] The usage process of this utility model is as follows: In use, the operator first inserts the wire retaining ring 3 into the auxiliary installation wire retaining ring groove 15 on the main valve sleeve 1, and then fits the O-ring into the O-ring groove on the main valve sleeve 1. Next, the assembled main valve sleeve 1 is assembled with the connecting sleeve 10, so that the wire retaining ring 3 is engaged in the wire retaining ring groove 13 on the connecting sleeve 10. Then, the connecting rod 5 is fixed to the upper part of the spool valve core 2 by the cylindrical pin 4, wherein the spool valve core 2 and the cylindrical pin 4 are clearance-fitted, and the cylindrical pin 4 and the connecting rod 5 are interference-fitted. The spring 8 and the spring seat 9 are then installed on the connecting rod 5. The valve core 2 is assembled inside the main valve sleeve 1 and is coaxially arranged with the main valve sleeve 1. Finally, the magnetic tube assembly 11 is connected to the top of the connecting rod 5 installed inside the connecting sleeve 10 through the push rod, and the O-ring and elastic retaining ring used for sealing are installed in the solenoid valve. The top of the magnetic tube assembly 11 is provided with a locking nut 12. In this way, the originally separated main valve sleeve 1 is connected to the connecting sleeve 10 through the wire retainer 3, which not only facilitates the installation of the solenoid valve and improves production efficiency, but also reduces the phenomenon of valve jamming for the solenoid valve and greatly improves its performance.

[0020] Other undescribed parts of this utility model are the same as those in the prior art.

Claims

1. A floating solenoid valve characterized by It includes a main valve sleeve (1), a connecting sleeve (10), and a spool valve core (2). The spool valve core (2) is disposed inside the main valve sleeve (1) and is coaxially disposed with the main valve sleeve (1). A connecting rod (5) is fixed to the upper part of the spool valve core (2) by a cylindrical pin (4). The spool valve core (2) and the cylindrical pin (4) are clearance-fitted. The cylindrical pin (4) and the connecting rod (5) are interference-fitted. The connecting rod (5) extends out of the main valve sleeve (1). The main valve sleeve (1) and the connecting sleeve (10) are fixed by a wire retainer (3). The top of the connecting rod (5) is installed inside the connecting sleeve (10). A gasket (6) is fitted on the connecting rod (5). A bushing (7) is installed on the top of the main valve sleeve (1). The bottom surface of the bushing (7) presses the gasket (6) tightly against the top surface of the main valve sleeve (1). The top surface of the bushing (7) abuts against the inner surface of the connecting sleeve (10). A spring seat (9) is provided on the top of the connecting rod (5) installed inside the connecting sleeve (10). A spring (8) is provided inside the spring seat (9) and wound around the connecting rod (5). One end of the spring (8) is fixed on the spring seat (9), and the other end of the spring (8) is fixed on the upper surface of the gasket (6). A magnetic tube assembly (11) is provided on the top surface of the connecting sleeve (10), and a locking nut (12) is provided on the top of the magnetic tube assembly (11).

2. The floating solenoid valve according to claim 1, characterized in that The lower part of the inner wall of the connecting sleeve (10) is provided with a wire retaining groove (13) for installing the wire retaining ring (3), and the cross section of the wire retaining groove (13) is circular.

3. The floating solenoid valve according to claim 2, characterized in that An inclined ring (14) is provided at the connection between the top surface of the steel wire retaining ring groove (13) and the main valve sleeve (1), and the top of the inclined ring (14) is inclined inward from the edge.

4. The floating solenoid valve according to claim 3, characterized in that The diameter of the wire retaining ring (3) is larger than the diameter of the wire retaining groove (13).

5. The floating solenoid valve of claim 1 wherein The upper part of the outer wall of the main valve sleeve (1) is provided with an auxiliary steel wire retaining ring installation groove (15).

6. The floating solenoid valve according to claim 5, characterized in that The upper part of the outer wall of the main valve sleeve (1) and above the auxiliary wire retaining ring mounting groove (15) is provided with an O-ring groove for placing O-rings.

7. The floating solenoid valve of claim 1 wherein The magnetic tube assembly (11) is connected to the top of the connecting rod (5) installed inside the connecting sleeve (10) via a push rod.

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