Novel throttling characteristic balance valve

Abstract

The utility model relates to the technical field of balance valves, and discloses a novel throttling characteristic balance valve which comprises a first valve sleeve, and a plurality of pilot ports and oil return ports are respectively formed in the outer surface of the first valve sleeve. By arranging the cone valve element, the pilot port, the second spring seat and the pressure adjusting spring, when oil enters the first valve sleeve through the load port, the oil pressure acts on the left side of the cone valve element, and the cone valve element overcomes the spring force of the pressure adjusting spring along with rising of the oil pressure; at the moment, the cone valve element moves rightwards along the interior of the first valve sleeve, the cone valve element compresses a pressure adjusting spring through a second spring seat, then the cone valve element moves rightwards to enable a pilot port to be communicated with the interior of the first valve sleeve, and then oil flows to the pilot port from the interior of the first valve sleeve; wherein the opening degree of the pilot port is determined by the covering amount of the cone valve element on the pilot port, and therefore the function of meeting the debugging requirements of different working conditions is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of balancing valves, and more specifically, to a balancing valve with new throttling characteristics. Background Art

[0002] As a load control valve, the balancing valve is widely used in various hydraulic systems. In particular, the balancing valve plays an extremely important control role in working conditions such as lifting, boom length adjustment, and winching. Especially in inertial load applications, the balancing valve can convert negative loads into positive loads, which is conducive to control. The balancing valve is a control valve that integrates multiple functions such as load holding, speed limiting, and one-way low fluid resistance. The principle of limiting the load speed of the balancing valve is to limit the flow discharged from the load back pressure chamber by controlling the opening amount of the valve port to avoid uncontrolled drop of the load. There is a certain distance between the existing balancing valve port and the cone valve core, which leads to the opening and flow characteristics of the balancing valve port being basically fixed, which makes the large-diameter valve less stable in small flow applications, resulting in poor product applicability, and therefore needs to be improved. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a new throttling characteristic balancing valve, which has the advantage of adapting to the debugging requirements of different working conditions.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a new throttling characteristic balancing valve, comprising:

[0005] A first valve sleeve, wherein a plurality of pilot ports and oil return ports are respectively formed on the outer surface of the first valve sleeve, and a second valve sleeve is fixedly sleeved on the right side of the interior of the first valve sleeve;

[0006] an adjusting mechanism, the adjusting mechanism being arranged inside the first valve sleeve;

[0007] In which, the adjusting mechanism includes a first spring seat, which is sleeved on the left side of the interior of the first valve sleeve, and the interior of the first spring seat is movably sleeved with a load port, and the outer surface of the load port is fixedly mounted with a one-way valve spring, and the left end of the one-way valve spring is fixedly connected to the right side of the first spring seat, and the right side of the load port is movably connected with a cone valve core, and the outer surface of the cone valve core is movably sleeved with the interior of the first valve sleeve, and the right end of the cone valve core is fixedly mounted with a second spring seat, and the right side of the second spring seat is fixedly mounted with a pressure-adjusting spring, and the right end of the pressure-adjusting spring is fixedly mounted with a third spring seat, and the outer surface of the third spring seat is movably connected to the interior of the second valve sleeve.

[0008] As an optimal technical solution of the present invention, the outer surface of the cone valve core is fixedly sleeved with a first guide sleeve, the right side of the first guide sleeve is fixedly installed with a second guide sleeve, and the outer surfaces of the first guide sleeve and the second guide sleeve are both movably sleeved with the inner part of the first valve sleeve.

[0009] As a preferred technical solution of the present invention, a first rubber ring is provided on the outer surface of the first spring seat, and the outer surface of the first rubber ring is in contact with the interior of the first valve sleeve.

[0010] As a preferred technical solution of the present invention, a second rubber ring is provided on the outer surface of the load port, and the outer surface of the second rubber ring contacts the interior of the first valve sleeve.

[0011] As a preferred technical solution of the present invention, a third rubber ring is provided on the outer surface of the cone valve core, and the outer surface of the third rubber ring is in contact with the interior of the first valve sleeve.

[0012] As a preferred technical solution of the present invention, a fourth rubber ring is provided on the outer surface of the second valve sleeve, and the outer surface of the fourth rubber ring is in contact with the interior of the first valve sleeve.

[0013] As a preferred technical solution of the present invention, the right side of the third spring seat is movably connected with an adjusting rod, and the adjusting rod is sleeved with the internal thread of the right side of the second valve sleeve.

[0014] As a preferred technical solution of the present invention, a sealing nut is threadedly sleeved on the outer surface of the adjusting rod, and the left end of the sealing nut is in contact with the right side of the second valve sleeve.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The utility model provides a cone valve core, a pilot port, a second spring seat and a pressure-regulating spring. When oil enters the interior of the first valve sleeve through the load port, the oil pressure acts on the left side of the cone valve core. As the oil pressure increases, the cone valve core overcomes the spring force of the pressure-regulating spring. The cone valve core moves rightward along the interior of the first valve sleeve. At this time, the cone valve core compresses the pressure-regulating spring through the second spring seat. Then, the cone valve core connects the pilot port with the interior of the first valve sleeve during the rightward movement. Subsequently, oil flows from the interior of the first valve sleeve to the pilot port. The opening of the pilot port is determined by the amount of coverage of the pilot port by the cone valve core, thereby realizing the function of adapting to the debugging requirements of different working conditions.

[0017] 2. The utility model provides a first guide sleeve, a second guide sleeve, an adjusting rod and a sealing nut. Due to the design of the first guide sleeve and the second guide sleeve, the movement of the cone valve core is well guided, so that the cone valve core is more stable when moving left and right along the inside of the first valve sleeve. Since the adjusting rod is threadedly sleeved with the internal thread of the second valve sleeve, when the adjusting rod rotates along the inside of the second valve sleeve, it pushes the third spring seat, so that the third spring seat compresses the pressure-regulating spring, thereby achieving the pressure required for opening the pilot port by adjusting the compression amount of the pressure-regulating spring. Since the interior of the sealing nut is threadedly sleeved with the outer surface of the adjusting rod, when the sealing nut rotates along the outer surface of the adjusting rod, it will move left and right at the same time. When the outer surface of the sealing nut fits against the outer surface of the second valve sleeve during movement, the sealing between the adjusting rod and the second valve sleeve will be increased. Due to the design of the first rubber ring, the second rubber ring, the third rubber ring and the fourth rubber ring, the sealing between the various components of the balancing valve can be enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic cross-sectional view of the utility model;

[0020] Figure 3 This is a structural diagram of the hydraulic control throttling state of the utility model;

[0021] Figure 4 This is a schematic diagram of the oil flow structure in the hydraulic control throttling state of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the utility model in a one-way free flow state;

[0023] Figure 6 This is a schematic diagram of the oil flow structure in a one-way free flow state of the utility model.

[0024] In the figure: 1. First valve sleeve; 2. Pilot port; 3. Oil return port; 4. Second valve sleeve; 5. First spring seat; 6. Load port; 7. One-way valve spring; 8. Cone valve core; 9. Second spring seat; 10. Pressure-adjusting spring; 11. Third spring seat; 12. First guide sleeve; 13. Second guide sleeve; 14. First rubber ring; 15. Second rubber ring; 16. Third rubber ring; 17. Fourth rubber ring; 18. Adjusting rod; 19. Sealing nut. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figures 1 to 6 As shown, the utility model provides a new throttling characteristic balancing valve, including:

[0027] A first valve sleeve 1, the outer surface of which is provided with a plurality of pilot ports 2 and oil return ports 3, and a second valve sleeve 4 is fixedly sleeved on the right side of the interior of the first valve sleeve 1;

[0028] An adjusting mechanism is provided inside the first valve sleeve 1;

[0029] Among them, the adjusting mechanism includes a first spring seat 5, which is sleeved on the left side of the inside of the first valve sleeve 1, and the load port 6 is movably sleeved inside the first spring seat 5. The outer surface of the load port 6 is fixedly installed with a one-way valve spring 7, and the left end of the one-way valve spring 7 is fixedly connected to the right side of the first spring seat 5. The right side of the load port 6 is movably connected with a cone valve core 8, and the outer surface of the cone valve core 8 is movably sleeved with the inside of the first valve sleeve 1. The right end of the cone valve core 8 is fixedly installed with a second spring seat 9, and a pressure-regulating spring 10 is fixedly installed on the right side of the second spring seat 9. The right end of the pressure-regulating spring 10 is fixedly installed with a third spring seat 11, and the outer surface of the third spring seat 11 is movably connected to the inside of the second valve sleeve 4.

[0030] When the balancing valve is in the hydraulically controlled throttling state, the oil will enter the interior of the first valve sleeve 1 through the load port 6. As the oil pressure increases, the cone valve core 8 will overcome the spring force of the pressure-regulating spring 10 and move to the right along the interior of the first valve sleeve 1. At this time, the cone valve core 8 will compress the pressure-regulating spring 10 through the second spring seat 9. In this process, the cone valve core 8 will release the obstruction of the pilot port 2, and the oil inside the first valve sleeve 1 will flow to the pilot port 2. The opening of the pilot port 2 is determined by the covering amount of the cone valve core 8 on the pilot port 2, thereby realizing an adjustment function that can adapt to different working conditions. To test the function required, when the balancing valve is in a one-way free flow state, the oil will enter the interior of the first valve sleeve 1 through the oil return port 3. At this time, the oil pressure will act between the load port 6 and the cone valve core 8. Due to the different stiffness of the one-way valve spring 7 and the pressure regulating spring 10, as the oil pressure increases, the load port 6 will first overcome the spring force of the one-way valve spring 7 and then compress the one-way valve spring 7, so that the load port 6 moves to the left along the interior of the first valve sleeve 1, and then the oil will flow into the interior of the first valve sleeve 1 through the oil return port 3 and then discharge the balancing valve from the load port 6.

[0031] The outer surface of the cone valve core 8 is fixedly connected to the first guide sleeve 12 , and the right side of the first guide sleeve 12 is fixedly installed with the second guide sleeve 13 . The outer surfaces of the first guide sleeve 12 and the second guide sleeve 13 are movably connected to the interior of the first valve sleeve 1 .

[0032] Due to the design of the first guide sleeve 12 and the second guide sleeve 13 , the movement of the cone valve core 8 is well guided, thereby making the cone valve core 8 more stable when moving left and right.

[0033] A first rubber ring 14 is provided on the outer surface of the first spring seat 5 , and the outer surface of the first rubber ring 14 contacts the interior of the first valve sleeve 1 .

[0034] Due to the design of the first rubber ring 14 , the sealing between the first spring seat 5 and the first valve sleeve 1 can be enhanced.

[0035] The outer surface of the load port 6 is provided with a second rubber ring 15 , and the outer surface of the second rubber ring 15 contacts the interior of the first valve sleeve 1 .

[0036] Due to the design of the second rubber ring 15 , the sealing performance between the load port 6 and the first valve sleeve 1 can be enhanced.

[0037] The outer surface of the cone valve core 8 is provided with a third rubber ring 16 , and the outer surface of the third rubber ring 16 is in contact with the interior of the first valve sleeve 1 .

[0038] Due to the design of the third rubber ring 16 , the sealing between the cone valve core 8 and the first valve sleeve 1 can be improved.

[0039] The outer surface of the second valve sleeve 4 is provided with a fourth rubber ring 17 , and the outer surface of the fourth rubber ring 17 is in contact with the interior of the first valve sleeve 1 .

[0040] Due to the design of the fourth rubber ring 17 , the sealing performance between the second valve sleeve 4 and the first valve sleeve 1 can be increased.

[0041] The right side of the third spring seat 11 is movably connected with an adjusting rod 18 , and the adjusting rod 18 is sleeved with the internal thread of the right side of the second valve sleeve 4 .

[0042] Since the outer surface of the adjusting rod 18 is sleeved with the internal thread on the right side of the second valve sleeve 4, when the adjusting rod 18 rotates along the inside of the second valve sleeve 4, it will move left and right at the same time. When the adjusting rod 18 moves to the left while rotating, the adjusting rod 18 will drive the third spring seat 11 to move to the left. At this time, the third spring seat 11 will compress the pressure-regulating spring 10, and then the pressure required to open the pilot port 2 can be adjusted by adjusting the compression amount of the pressure-regulating spring 10.

[0043] A sealing nut 19 is threadedly sleeved on the outer surface of the regulating rod 18 , and the left end of the sealing nut 19 contacts the right side of the second valve sleeve 4 .

[0044] Since the interior of the sealing nut 19 is threadedly connected to the outer surface of the adjusting rod 18, when the sealing nut 19 rotates along the outer surface of the adjusting rod 18, it will move left and right at the same time. When the left side of the sealing nut 19 contacts the right side of the second valve sleeve 4, the sealing between the second valve sleeve 4 and the adjusting rod 18 will be able to increase.

[0045] The working principle and use process of this utility model:

[0046] When the balancing valve is in the hydraulically controlled throttling state, the oil will enter the interior of the first valve sleeve 1 through the load port 6. At this time, the oil pressure will act on the load port 6 and the left side of the cone valve core 8. Since the right side of the load port 6 is blocked by the step inside the first valve sleeve 1 and cannot move, the hydraulic pressure applied to the cone valve core 8 squeezes the second spring seat 9. As the pressure increases, the second spring seat 9 will overcome the spring force of the pressure-adjusting spring 10. At this time, the cone valve core 8 will drive the second spring seat 9 to move to the right to compress the pressure-adjusting spring 10. At this time, the cone valve core 8 will release the obstruction to the pilot port 2 during the rightward movement, thereby connecting the pilot port 2 with the interior of the first valve sleeve 1. At this time, the pilot port 2 will be in an open state, and the oil will be discharged from the first valve sleeve 1. , and the oil flows to the pilot port 2 inside the valve sleeve 1, wherein the opening of the pilot port 2 is determined by the covering amount of the cone valve core 8 on the pilot port 2, thereby realizing the function of adapting to the debugging requirements of different working conditions. When the balancing valve is in a one-way free flow state, the oil will enter the interior of the first valve sleeve 1 through the return oil port 3. At this time, the oil pressure will act between the load port 6 and the cone valve core 8. Due to the different stiffness of the one-way valve spring 7 and the pressure regulating spring 10, as the pressure increases, the load port 6 will first overcome the spring force of the one-way valve spring 7 to compress the one-way valve spring 7, thereby causing the load port 6 to move to the left along the interior of the first valve sleeve 1. At this time, the load port 6 will move to the left to connect the return oil port 3 with the interior of the first valve sleeve 1, so that the oil flows from the return oil port 3 to the load port 6.

[0047] The design of the first guide sleeve 12 and the second guide sleeve 13 effectively guides the movement of the cone valve core 8, ensuring smoother left-right movement of the first valve sleeve 1. The design of the first rubber ring 14, the second rubber ring 15, the third rubber ring 16, and the fourth rubber ring 17 enhances the sealing between the various components of the balancing valve. Because the outer surface of the adjusting rod 18 is threadedly engaged with the inner surface of the second valve sleeve 4, when the adjusting rod 18 rotates along the interior of the second valve sleeve 4, it simultaneously moves leftward. At this time, the adjusting rod 18 squeezes and pushes the third spring seat 11, causing the third spring seat 11 to compress the pressure-regulating spring 10. The pressure required to open the pilot port 2 increases with the compression of the pressure-regulating spring 10. Because the inner surface of the sealing nut 19 is threadedly engaged with the outer surface of the adjusting rod 18, when the sealing nut 19 rotates along the outer surface of the adjusting rod 18, it simultaneously moves left and right. Due to the design of the sealing nut 19, when the left side of the sealing nut 19 contacts the right side of the second valve sleeve 4, the sealing between the adjusting rod 18 and the second valve sleeve 4 is enhanced.

[0048] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new throttling characteristic balancing valve, characterized in that: Includes: A first valve sleeve (1), wherein the outer surface of the first valve sleeve (1) is respectively provided with a plurality of pilot ports (2) and oil return ports (3), and a second valve sleeve (4) is fixedly sleeved on the right side of the interior of the first valve sleeve (1); An adjusting mechanism, the adjusting mechanism being arranged inside the first valve sleeve (1); The regulating mechanism comprises a first spring seat (5), the first spring seat (5) being sleeved on the left side of the interior of the first valve sleeve (1), the interior of the first spring seat (5) being movably sleeved with a load port (6), the outer surface of the load port (6) being fixedly mounted with a one-way valve spring (7), the left end of the one-way valve spring (7) being fixedly connected to the right side of the first spring seat (5), the right side of the load port (6) being movably connected with a cone valve core (8), the outer surface of the cone valve core (8) being movably sleeved with the interior of the first valve sleeve (1), the right end of the cone valve core (8) being fixedly mounted with a second spring seat (9), the right side of the second spring seat (9) being fixedly mounted with a pressure regulating spring (10), the right end of the pressure regulating spring (10) being fixedly mounted with a third spring seat (11), the outer surface of the third spring seat (11) being movably connected with the interior of the second valve sleeve (4).

2. A new throttling characteristic balancing valve according to claim 1, characterized in that: The outer surface of the cone valve core (8) is fixedly sleeved with a first guide sleeve (12), and a second guide sleeve (13) is fixedly installed on the right side of the first guide sleeve (12). The outer surfaces of the first guide sleeve (12) and the second guide sleeve (13) are both movably sleeved with the interior of the first valve sleeve (1).

3. A new throttling characteristic balancing valve according to claim 1, characterized in that: A first rubber ring (14) is provided on the outer surface of the first spring seat (5), and the outer surface of the first rubber ring (14) is in contact with the interior of the first valve sleeve (1).

4. A new throttling characteristic balancing valve according to claim 1, characterized in that: The outer surface of the load port (6) is provided with a second rubber ring (15), and the outer surface of the second rubber ring (15) is in contact with the interior of the first valve sleeve (1).

5. A new throttling characteristic balancing valve according to claim 1, characterized in that: A third rubber ring (16) is provided on the outer surface of the cone valve core (8), and the outer surface of the third rubber ring (16) is in contact with the interior of the first valve sleeve (1).

6. A new throttling characteristic balancing valve according to claim 1, characterized in that: The outer surface of the second valve sleeve (4) is provided with a fourth rubber ring (17), and the outer surface of the fourth rubber ring (17) is in contact with the interior of the first valve sleeve (1).

7. A new throttling characteristic balancing valve according to claim 1, characterized in that: The right side of the third spring seat (11) is movably connected to an adjusting rod (18), and the adjusting rod (18) is sleeved with the internal thread of the right side of the second valve sleeve (4).

8. A new throttling characteristic balancing valve according to claim 7, characterized in that: The outer surface of the regulating rod (18) is threadedly sleeved with a sealing nut (19), and the left end of the sealing nut (19) contacts the right side of the second valve sleeve (4).

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