Pressure-adjustable hydraulic valve

Abstract

The utility model discloses a pressure-adjustable hydraulic valve which comprises a ball valve body, a sleeve is arranged on a valve body which the ball valve body belongs to, an inner hole of the sleeve is communicated with the interior of the valve body, a plug, a spring and a pressure adjusting nut which is in threaded connection with the inner hole are arranged in the inner hole of the sleeve, and the pressure adjusting nut is in threaded connection with the inner hole of the sleeve. The spring is connected between the plug and the pressure adjusting nut, and the spring tends to drive the plug to move towards the interior of the valve body under the action of no external force. A pair of outer connectors is arranged on the side wall of the sleeve, and liquid drainage holes communicated with an inner hole of the sleeve are formed in the outer connectors. After the hydraulic valve is installed in a hydraulic system, the pressure is kept constant within the safety range, meanwhile, the structure is simple, production and manufacturing are easy, and cost is reduced; and secondly, the pressure adjustability is realized, the control requirements on the pressure in the hydraulic system under different working conditions are met, and the safety and the reliability of the hydraulic system are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, specifically, relate to a pressure adjustable hydraulic valve BACKGROUND

[0002] Hydraulic valve is the control part in the pipeline fluid delivery system, through its control pipeline fluid flow state and adjust flow. Among them, in the use process, in order to stabilize the pressure, realize the protection of pipeline, usually will adopt pressure hydraulic valve to control the pressure in the hydraulic system to keep constant safety range, to avoid the damage of pipeline or equipment in the system due to pressure rise, thereby improving safety.

[0003] At present, the pressure hydraulic valve that can keep the system pressure constant can be easily found in the market, but the applicant finds that a set of hydraulic valve with pressure control and stable performance, its structure is often more complex, and the cost is also higher, and the low price is often not stable in performance, therefore, how to meet the needs of users through the most simple structure, has higher practical value. UTILITY MODEL CONTENT

[0004] In order to solve the problems existing in the prior art, the utility model aims at providing a pressure adjustable hydraulic valve, which realizes pressure control and stable performance, has simple structure and is easy to produce and manufacture, reduces cost, realizes pressure adjustability, meets the control requirements of pressure in the hydraulic system under different working conditions, and improves the safety and reliability of the hydraulic system.

[0005] To achieve the above technical purposes and effects, the utility model realizes the following technical scheme:

[0006] A pressure adjustable hydraulic valve, comprising a ball valve body, a sleeve is arranged on the valve body to which the ball valve body belongs, the inner hole of the sleeve is in communication with the inside of the valve body, a plug, a spring and a pressure adjusting nut in screw connection with the inner hole are arranged in the inner hole of the sleeve, the spring is connected between the plug and the pressure adjusting nut, and the spring has a tendency to drive the plug to move towards the inside of the valve body under the action of no external force, a pair of external connectors are arranged on the side wall of the sleeve, and a drain hole in communication with the inner hole of the sleeve is arranged in the pair of external connectors.

[0007] Further, the valve body to which the ball valve body belongs adopts a two-section type.

[0008] Further, a group of sleeves are arranged on one section of the valve body, or a group of sleeves are arranged on each section of the valve body.

[0009] Further, the sleeve is integrally formed with the valve body.

[0010] Further, the inner hole of the sleeve is a stepped hole, which is composed of first, second, third and fourth stepped holes with diameters decreasing from top to bottom; wherein the plug and the spring are arranged in the third stepped hole, and the pressure adjusting nut is movably connected in the first and second stepped holes.

[0011] Further, the plug is a sphere.

[0012] Further, the outer surface of the pressure adjusting nut is stepped, which includes an upper stepped section threadedly connected with the first stepped hole and a lower stepped section slidably arranged in the second stepped hole.

[0013] Further, a sealing ring is arranged on the outer surface of the lower stepped section, and a counterbore is formed on the lower end surface of the lower stepped section.

[0014] Further, the inner diameter of the counterbore is greater than the outer diameter of the spring.

[0015] Further, the cross section of the external connector is convex.

[0016] The utility model discloses the beneficial effect is as follows: the utility model discloses a sleeve and sets up the plug, spring and pressure adjusting nut in the sleeve, and the hydraulic valve of the application is installed to the hydraulic system, and the pressure is kept constant in the safe range, and the structure is simple and easy to produce and manufacture, and the cost is reduced, and the pressure adjusting nut is changed to the spring compression amount in the application, and the pressure adjustability is realized, and the control demand of pressure in the hydraulic system under different working conditions is satisfied, and the safety and reliability of the hydraulic system are improved.

[0017] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and can be implemented according to the content of the specification, the following preferred embodiments of the utility model and the drawings are described in detail as follows.The specific embodiment of the utility model is given in detail by the following embodiments and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings described herein are used to provide further understanding of the utility model, and constitute a part of the present application, and the schematic embodiments of the utility model and the description are used to explain the utility model, and do not constitute improper limitation on the utility model.In the drawings:

[0019] Figure 1 It is the overall structure schematic view of the hydraulic valve of the utility model;

[0020] Figure 2 It is the front view of the hydraulic valve of the utility model;

[0021] Figure 3 This is a partial sectional view of the hydraulic valve of this utility model;

[0022] Figure 4 This is a cross-sectional view of the sleeve of this utility model;

[0023] Figure 5 This is a schematic diagram of the pressure regulating nut structure of this utility model.

[0024] The following are the labels in the diagram: 1. Ball valve body; 2. Sleeve; 3. Plug; 4. Spring; 5. Pressure adjusting nut; 6. External connector; 7. Sealing ring; 21. First step hole; 22. Second step hole; 23. Third step hole; 24. Fourth step hole; 51. Upper step section; 52. Lower step section; 53. Countersunk hole; 61. Drain hole. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, upper end, lower end, top, bottom, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] See Figures 1-3 As shown, a pressure-adjustable hydraulic valve includes a ball valve body 1. A sleeve 2 is provided on the valve body to which the ball valve body 1 belongs. The inner hole of the sleeve 2 communicates with the interior of the valve body. A plug 3, a spring 4, and a pressure adjusting nut 5 threaded to the inner hole are provided in the inner hole of the sleeve 2. The spring 4 is connected between the plug 3 and the pressure adjusting nut 5. Under the action of no external force, the spring 4 has a tendency to drive the plug 3 to move into the interior of the valve body. An external connector 6 is provided on the side wall of the sleeve 2. A drain hole 61 communicating with the inner hole of the sleeve 2 is provided in the external connector 6.

[0028] The connection between the spring 4 and the plug 3 and the pressure adjusting nut 5 can be a fixed connection or a mating connection. In this embodiment, one end of the spring 4 is connected to the plug 3 in a mating manner; in other embodiments, one end of the spring 4 is fixedly connected to the plug 3. Similarly, in this embodiment, the other end of the spring 4 is connected to the pressure adjusting nut 5 in a mating manner; in other embodiments, the other end of the spring 4 is fixedly connected to the pressure adjusting nut 5.

[0029] Further, see Figures 1-2As shown, in this embodiment, the valve body to which the ball valve body 1 belongs is a two-section valve body; wherein, a set of sleeves 2 is provided on one section of the valve body, or a set of sleeves 2 is provided on each of the two sections of the valve body; in this embodiment, a set of sleeves 2 is provided on each of the two sections of the valve body, and the sleeves 2 are integrally formed with the corresponding valve body sections to improve the connection strength.

[0030] Further, see Figure 4 As shown, in this embodiment, the inner hole of the sleeve 2 is a stepped hole, which consists of first, second, third, and fourth stepped holes 21, 22, 23, and 24 with successively decreasing diameters from top to bottom; wherein, see Figure 3 As shown, the plug 3 and the spring 4 are disposed in the third stepped hole 23, and the pressure adjusting nut 5 is movably connected in the first and second stepped holes 21 and 22. At this time, without the action of external force, the spring 4 tends to drive the plug 3 to move towards the lower stepped hole 23, thereby sealing the connection between the third stepped hole 23 and the fourth stepped hole 24. The drain hole 61 opened in the external connector 6 is connected to the third stepped hole 22.

[0031] Further, see Figure 3 As shown, in this embodiment, the plug 3 is a sphere.

[0032] Further, see Figure 5 As shown, in this embodiment, the outer surface of the pressure adjusting nut 5 is stepped, including an upper stepped section 51 and a lower stepped section 52. For installation, refer to... Figure 3 As shown, the upper stepped section 51 is threadedly connected to the first stepped hole 21, and the lower stepped section 52 is slidably inserted into the second stepped hole 22.

[0033] Further, see Figure 3 As shown in Figure 5, in this embodiment, a sealing ring 7 is provided on the outer surface of the lower stepped section 52. The sealing ring 7 can effectively prevent liquid from overflowing upward between the lower stepped section 52 and the second stepped hole 22. A countersunk hole 53 is provided on the lower end face of the lower stepped section 52. The inner diameter of the countersunk hole 53 is larger than the outer diameter of the spring 4. This allows the spring 4 to partially sink into the pressure adjusting nut 5 after it is connected to the pressure adjusting nut 5, thereby effectively preventing the spring 4 from moving between the plug 3 and the pressure adjusting nut 5, and thus improving stability.

[0034] Further, see Figures 2-4As shown, in this embodiment, the cross-section of the external connector 6 is convex; during connection, it is connected to the external pipe through the small end face of the external connector 6.

[0035] The working principle of this utility model is as follows:

[0036] In use, the hydraulic valve in this embodiment is connected to the hydraulic system, and the external pipeline is connected to the external connector 6. The pressure is adjusted to the required safe range of the hydraulic system by turning the pressure adjusting nut 5 with a wrench. The hydraulic valve is then opened to realize the hydraulic system fluid supply operation. When the force of the liquid in the hydraulic valve on the plug 3 exceeds the force of the spring 4 on the plug 3, the plug 3 moves upward and further compresses the spring 4. At this time, the lower stepped hole 23 and the middle stepped hole 22 are connected. The liquid enters the middle stepped hole 22 through the lower stepped hole 23 and is discharged into the external pipeline through the drain hole 61 for recovery. This achieves constant pressure in the hydraulic system during the fluid supply process by overflow, thereby improving safety.

[0037] During use, the compression of the spring 4 can be changed by adjusting the pressure adjusting nut 5 up and down, thereby meeting the pressure control requirements of the hydraulic system under different working conditions and effectively improving the safety and reliability of the hydraulic system.

[0038] It should be noted that in this embodiment, by setting sleeves 2 and plugs 3, springs 4 and pressure adjusting nuts 5 on the two sections of the valve body to which the ball valve body 1 belongs, dual protection is achieved during the liquid supply process. This further improves safety and reliability while preventing the problem of pressure overload in the hydraulic system caused by continuous liquid supply or backflow of liquid under force in the hydraulic system when the hydraulic valve is closed.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. 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 adjustable hydraulic valve comprising a ball valve body (1), characterized in that: The valve body of the ball valve body (1) is provided with a sleeve (2), the inner hole of the sleeve (2) is communicated with the inside of the valve body, and the plug (3), spring (4) and pressure regulating nut (5) are arranged in the inner hole of the sleeve (2), the spring (4) is connected between the plug (3) and the pressure regulating nut (5), under the action of no external force, the spring (4) has the tendency to drive the plug (3) to move to the inside of the valve body, a pair of outer connectors (6) are arranged on the side wall of the sleeve (2), the outer connectors (6) are provided with a drainage hole (61) communicated with the inner hole of the sleeve (2).

2. The pressure adjustable hydraulic valve of claim 1, wherein: The valve body of the ball valve body (1) is two-section type.

3. The pressure adjustable hydraulic valve of claim 2, wherein: A group of sleeves (2) are arranged on one section of the valve body, or a group of sleeves (2) are arranged on each section of the valve body.

4. The pressure adjustable hydraulic valve of claim 3, wherein: The sleeve (2) is integrally formed with the valve body.

5. The pressure adjustable hydraulic valve of claim 1, wherein: The inner hole of the sleeve (2) is a stepped hole, which is composed of first stepped hole (21), second stepped hole (22), third stepped hole (23) and fourth stepped hole (24) from top to bottom, the hole diameter is sequentially reduced, the plug (3) and the spring (4) are arranged in the third stepped hole (23), and the pressure regulating nut (5) is movably connected in the first stepped hole (21) and the second stepped hole (22).

6. The pressure adjustable hydraulic valve of claim 5, wherein: The plug (3) is a sphere.

7. The pressure adjustable hydraulic valve of claim 5, wherein: The outer surface of the pressure regulating nut (5) is stepped, which includes the upper stepped section (51) threaded with the first stepped hole (21) and the lower stepped section (52) slidably arranged in the second stepped hole (22).

8. The pressure adjustable hydraulic valve of claim 7, wherein: A sealing ring (7) is arranged on the outer surface of the lower stepped section (52), and a counterbore (53) is arranged on the lower end surface of the lower stepped section (52).

9. The pressure adjustable hydraulic valve of claim 8, wherein: The inner diameter of the counterbore (53) is greater than the outer diameter of the spring (4).

10. The pressure adjustable hydraulic valve of claim 1, wherein: The cross section of the outer connector (6) is convex.

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