An adjustable relief valve having an adjustment lock assembly

Abstract

The utility model discloses a kind of adjustable overflow valves with adjusting locking assembly, including valve body, main valve seat, adjusting rod, connecting rod and valve stem, adjusting locking assembly is provided on the adjustable overflow valve, adjusting locking assembly includes locking steel ball, locking nut and adjusting steel ball, a plurality of first installation holes for placing the locking steel ball are provided on the main valve seat, the locking nut is sleeved on the main valve seat, and can move along the axial direction of main valve seat, a plurality of second installation holes for placing the adjusting steel ball are provided on the connecting rod, wherein, the adjusting steel ball can rotate in the second installation hole. The structural design of the application is the coordinated adjusting assembly of steel wire clasp spring, locking steel ball, locking nut, adjusting rod, adjusting steel ball, not only can make the valve locking there is self-centering effect, but also can reduce contact friction, so that the performance of the valve has greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to an adjustable overflow valve with an adjusting locking component. Background Technology

[0002] Traditional relief valves typically have two locking screws located on the outer hexagonal faces of the main valve seat (perpendicular to the axis of the adjusting rod). Firstly, after pressure adjustment, in some situations, space constraints make tightening these screws extremely inconvenient. Secondly, the traditional structure cannot achieve perfectly synchronized locking positions on both sides (it lacks self-centering), easily causing the adjusting rod to shift to one side. This results in the adjusting rod contacting and rubbing against the adjusting ball and connecting rod on one side, affecting performance and increasing hysteresis. This application aims to provide an adjustable relief valve with an adjusting locking assembly that overcomes the above-mentioned defects. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an adjustable overflow valve with an adjustable locking component.

[0004] The objective of this utility model is achieved through the following technical solution: An adjustable overflow valve with an adjusting locking assembly includes a valve body, a main valve seat, an adjusting rod, a connecting rod, and a valve stem. The adjustable overflow valve is provided with an adjusting locking assembly, which includes a locking steel ball, a locking nut, and an adjusting steel ball. The main valve seat is provided with a plurality of first mounting holes for placing the locking steel ball. The locking nut is sleeved on the main valve seat and can move axially along the main valve seat. The connecting rod is provided with a plurality of second mounting holes for placing the adjusting steel ball, wherein the adjusting steel ball can rotate in the second mounting holes.

[0005] Preferably, the adjusting rod is connected to the valve stem via the connecting rod. When the adjusting rod rotates, the valve stem can rotate due to the drive of the connecting rod. A ball valve seat is provided at the end of the valve stem, and a spring seat is rotatably provided on the valve stem. A one-way cone spring is provided on one side of the spring seat, and an overflow spring is provided on the other side of the spring seat. When the spring seat moves along the axial direction of the valve stem, the overflow spring can be compressed or released.

[0006] Preferably, the spring seat is provided with a spring seat fixing steel ball. When the spring seat is nested in the valve body, the inner wall of the valve body is provided with a limiting groove extending along the valve stem axial direction, and the spring seat fixing steel ball is nested in the limiting groove.

[0007] Preferably, when the valve stem rotates in the first direction, the spring seat can move downward, and when the valve stem rotates in the second direction, the spring seat can move upward.

[0008] Preferably, the adjusting rod is provided with a first thread, the locking nut is provided with a second thread, and the main valve seat is provided with a third thread, wherein the second thread and the third thread mesh with each other.

[0009] Preferably, the locking nut has a contact surface that can abut against the locking steel ball.

[0010] Preferably, the main valve seat is provided with a wire snap ring groove for placing a wire snap ring.

[0011] Preferably, the adjusting rod is provided with a sealing ring, the valve body is provided with a first channel and a third channel, and the ball valve seat is provided with a second channel.

[0012] This utility model has the following advantages: (1) The structural design of this application is a coordinated adjustment component consisting of a wire snap ring, a locking steel ball, a locking nut, an adjusting rod, and an adjusting steel ball. This not only enables the valve to have a self-centering effect after locking, but also reduces contact friction, thereby greatly improving the performance of the valve.

[0013] (2) This application designs the adjusting locking assembly on the axial direction of the adjusting rod, which allows for direct locking of the adjusting assembly even under space constraints in certain situations, greatly facilitating pressure adjustment and locking operations in certain confined spaces. Furthermore, this application changes the connection structure between the adjusting locking assembly and the connecting rod to an adjusting steel ball. The adjusting steel ball is assembled with a clearance, and the contact surface friction is relatively reduced. When the valve stem moves axially, the adjusting steel ball can rotate (dynamic friction), and the adjusting steel ball is a standard steel ball with high surface finish and low cost, significantly improving the overall valve performance and reducing costs. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the adjustable overflow valve of this utility model; Figure 2 This is a schematic diagram of the lock nut structure; Figure 3 This is a schematic diagram of the adjusting rod. Figure 4 A schematic diagram of the main valve seat; In the diagram, 1-adjusting rod, 2-wire snap ring, 3-locking steel ball, 4-locking nut, 5-sealing ring, 6-adjusting steel ball, 7-connecting rod, 8-main valve seat, 9-one-way cone spring, 10-spring seat, 11-spring seat fixing steel ball, 12-overflow spring, 13-valve stem, 14-ball valve seat, 15-valve body, 16-limiting groove, 101-first thread, 401-contact surface, 402-second thread, 801-wire snap ring groove, 802-third thread, 1501-first channel, 1502-second channel, 1503-third channel. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description: like Figures 1 to 4 As shown, this application provides an adjustable relief valve with an adjusting locking assembly, including a valve body 15, a main valve seat 8, an adjusting rod 1, a connecting rod 7, and a valve stem 13. The adjustable relief valve is provided with an adjusting locking assembly, which includes a locking steel ball 3, a locking nut 4, and an adjusting steel ball 6. The main valve seat 8 is provided with a plurality of first mounting holes for placing the locking steel ball 3. The locking nut 4 is sleeved on the main valve seat 8 and can move along the axial direction of the main valve seat 8. The connecting rod 7 is provided with a plurality of second mounting holes for placing the adjusting steel ball 6, wherein the adjusting steel ball 6 can rotate in the second mounting holes.

[0016] Preferably, the adjusting rod 1 is connected to the valve stem 13 via the connecting rod 7. When the adjusting rod 1 rotates, the valve stem 13 can rotate by the drive of the connecting rod 7. A ball valve seat 14 is provided at the end of the valve stem 13, and a spring seat 10 is rotatably provided on the valve stem 13. A one-way cone spring 9 is provided on one side of the spring seat 10, and an overflow spring 12 is provided on the other side of the spring seat 10. When the spring seat 10 moves along the axial direction of the valve stem 13, the overflow spring 12 can be compressed or released.

[0017] Preferably, the spring seat 10 is provided with a spring seat fixing steel ball 11. When the spring seat 10 is nested in the valve body 15, the inner wall of the valve body 15 is provided with a limiting groove 16 extending axially along the valve stem 13, and the spring seat fixing steel ball 11 is nested in the limiting groove 16.

[0018] Preferably, when the valve stem 13 rotates in a first direction, the spring seat 10 can move downward, and when the valve stem 13 rotates in a second direction, the spring seat 10 can move upward. For example, the first direction can be clockwise, and the second direction can be counterclockwise.

[0019] Preferably, the adjusting rod 1 is provided with a first thread 101, the locking nut 4 is provided with a second thread 402, and the main valve seat 8 is provided with a third thread 802, the second thread 402 and the third thread 802 meshing with each other. The locking nut 4 has a contact surface 401, which can abut against the locking steel ball 3. The main valve seat 8 is provided with a wire snap ring groove 801 for placing the wire snap ring 2. The adjusting rod 1 is provided with a sealing ring 5, the valve body 15 is provided with a first channel 1501 and a third channel 1503, and the ball valve seat 14 is provided with a second channel 1502.

[0020] The working principle of this application is as follows: When the oil enters from the third channel 1503, if the pressure is greater than the preload of the one-way cone spring 9, the ball valve seat 14 will leave the valve block, and together with the adjusting steel ball 6, connecting rod 7, spring seat 10, spring seat fixing steel ball 11, and valve stem 13, it will compress the one-way cone spring 9 upward in the axial direction of the main valve seat 8, so that the oil flows from the third channel 1503 to the first channel 1501. If the oil enters from the first channel 1501, it will flow into the second passage 1502 of the ball valve seat 14 through the gap and enter the rectangular groove of the valve stem 13 and the ball valve seat 14. If the pressure is greater than the preload of the overflow spring 12, the sealing cone surface of the valve stem 13 will leave the sealing cone edge of the ball valve seat 14, and together with the adjusting steel ball 6, connecting rod 7, spring seat 10, spring seat fixing steel ball 11, and valve stem 13, it will move downward in the axial direction of the main valve seat 8, so that the oil flows from the first channel 1501 to the third channel 1503. Whether the oil enters from the first channel 1501 and flows out from the third channel 1503, or vice versa, the opening of this valve involves relative movement between the adjusting steel ball 6 and the adjusting rod 1 due to contact friction. This application replaces the original pin design with an adjusting steel ball 6, whose movement is rotatable (dynamic friction). Furthermore, the adjusting steel ball 6 is a standard steel ball with high surface finish and low cost, significantly improving the overall valve performance and reducing costs. In addition, when the oil pressure enters from the first channel 1501 and flows out from the third channel 1503, the valve opens in this direction. This requires the valve's set pressure to be adjustable at any time. Therefore, the overflow spring 12 needs to be able to adjust different pre-pressure values ​​during valve use to achieve different opening pressures, and it needs to be locked during use to maintain stable pressure.

[0021] Working principle of pressure setting and locking: Pressure setting process: When the valve needs to be adjusted to increase or decrease its set pressure, the overflow spring 12 needs to be compressed or released. This process requires the spring seat 10 to be fixed in the circumferential direction by the steel ball 11, and the adjusting rod 1 is adjusted, which drives the adjusting steel ball 6 to rotate the connecting rod 7. The connecting rod 7 and the valve stem 13 are connected as a whole by threaded adhesive and added torque. Therefore, adjusting the adjusting rod 1 can realize the rotation of the valve stem 13, and the spring seat 10 moves axially up and down during the rotation of the valve stem 13, realizing the compression or release of the spring, thereby increasing or decreasing the set pressure of the valve. Locking process: After the pressure is set, pressure locking is required. First, the main valve seat 8 has three or four holes for placing locking steel balls 3. During tightening, the locking nut 4 can be connected to the main valve seat 8 using a hex wrench via its second thread 402, allowing it to move up and down along the axis of the main valve seat 8. When it reaches a certain position, the contact surface 401 of the locking nut 4 contacts the locking steel ball 3, causing it to press against the center of the adjusting rod 1. The first thread 101 of the adjusting rod 1 is knurled, creating friction between the locking steel balls 3 and the adjusting rod, making it less likely for the adjusting rod to rotate after tightening, thus achieving the tightening process. Simultaneously, a wire retaining ring groove 801 is designed on the main valve seat 8. Installing a wire retaining ring 2 at this location limits the movement distance of the locking nut 4, preventing it from moving indefinitely and detaching from the main valve seat 8. During the tightening process, the locking steel ball 3 will not easily detach from the hole in the main valve seat 8 and fall out.

[0022] 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. An adjustable relief valve with an adjustable locking assembly, comprising a valve body (15), a main valve seat (8), an adjusting rod (1), a connecting rod (7), and a valve stem (13), characterized in that, The adjustable overflow valve is provided with an adjusting locking assembly, which includes a locking steel ball (3), a locking nut (4) and an adjusting steel ball (6). The main valve seat (8) is provided with a plurality of first mounting holes for placing the locking steel ball (3). The locking nut (4) is sleeved on the main valve seat (8) and can move along the axial direction of the main valve seat (8). The connecting rod (7) is provided with a plurality of second mounting holes for placing the adjusting steel ball (6), wherein the adjusting steel ball (6) can rotate in the second mounting holes.

2. The adjustable overflow valve according to claim 1, characterized in that, The adjusting rod (1) is connected to the valve stem (13) via the connecting rod (7). When the adjusting rod (1) rotates, the valve stem (13) can rotate by the driving of the connecting rod (7). A ball valve seat (14) is provided at the end of the valve stem (13). A spring seat (10) is rotatably provided on the valve stem (13). A one-way cone spring (9) is provided on one side of the spring seat (10), and an overflow spring (12) is provided on the other side of the spring seat (10). When the spring seat (10) moves along the axial direction of the valve stem (13), the overflow spring (12) can be pressed or released.

3. The adjustable overflow valve according to claim 2, characterized in that, The spring seat (10) is provided with a spring seat fixing steel ball (11). When the spring seat (10) is nested in the valve body (15), the inner wall of the valve body (15) is provided with a limiting groove (16) extending axially along the valve stem (13), and the spring seat fixing steel ball (11) is nested in the limiting groove (16).

4. The adjustable overflow valve according to claim 3, characterized in that, When the valve stem (13) rotates in the first direction, the spring seat (10) can move downward, and when the valve stem (13) rotates in the second direction, the spring seat (10) can move upward.

5. The adjustable relief valve according to claim 2, characterized in that, The adjusting rod (1) is provided with a first thread (101), the locking nut (4) is provided with a second thread (402), and the main valve seat (8) is provided with a third thread (802). The second thread (402) and the third thread (802) mesh with each other.

6. The adjustable relief valve according to claim 5, characterized in that, The locking nut (4) has a contact surface (401) that can abut against the locking ball (3).

7. The adjustable overflow valve according to claim 2, characterized in that, The main valve seat (8) is provided with a wire snap ring groove (801) for placing the wire snap ring (2).

8. The adjustable overflow valve according to claim 2, characterized in that, The adjusting rod (1) is provided with a sealing ring (5), the valve body (15) is provided with a first channel (1501) and a third channel (1503), and the ball valve seat (14) is provided with a second channel (1502).

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