CN212986182U

CN212986182U - Novel valve body

Info

Publication number: CN212986182U
Application number: CN202021413877.0U
Authority: CN
Inventors: 杨志龙; 贾丽丽
Original assignee: Liaoning Hailan Fengyuan New Material Technology Development Co ltd
Current assignee: Liaoning Hailan Fengyuan New Material Technology Development Co ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2021-04-16
Anticipated expiration: 2030-07-17

Abstract

The utility model discloses a new valve body, which comprises a valve shell, a valve rod, a sliding block, an elastic piece and a limiting block; the valve rod is arranged in the valve casing, and the sliding block cover is separated into first cavity and second cavity on the valve rod and with the valve casing, and the both sides that lie in the sliding block on the valve rod are equipped with a set of elastic component and stopper respectively, and the stopper is fixed on the valve rod, elastic component one end and stopper butt, the other end and sliding block butt are equipped with logical oil groove in the periphery that lies in the valve rod between two stoppers, along the axial of valve rod, lead to the sectional area of oil groove and increase gradually to both ends by the centre. The novel valve body has a bidirectional damping effect, so that the bidirectional uniform change of hydraulic oil in oil cavities at two ends of the valve is ensured, and the impact caused by the rapid change of the hydraulic oil is avoided.

Description

Novel valve body

Technical Field

The utility model relates to a flow control device, concretely relates to new valve body.

Background

Valves are widely used in various fields for performing different controls on fluids to achieve corresponding functions.

In a hydraulic system, a damping valve is a valve which is commonly used, and has the function that when oil-free liquid flows, the front pressure and the rear pressure of the damping valve are the same; when oil flows, great on-way pressure loss can be generated, and a certain pressure difference exists between the front and the rear of the damping valve, so that the pressure impact of a hydraulic system can be effectively reduced, and the dynamic characteristic of the system is improved.

The in-process that current damping valve changed by the low-speed to high-speed at piston speed (the process that the pressure differential at damping valve both ends is by diminishing greatly), the damping valve has better damping effect, make flow increase gradually (the pressure differential at damping valve both ends dwindles gradually), however, when piston speed changed by high-speed to the low-speed (the pressure differential at damping valve both ends by the process of little grow), the closing that the damping valve can be quick, cause the abrupt change of flow, the abrupt change of this kind of flow can produce great impact force, and then influence external equipment's performance.

SUMMERY OF THE UTILITY MODEL

The utility model provides a new valve body has solved current damping valve and has produced the sudden change of flow by the in-process of little grow easily at the pressure differential at both ends, and then has produced the problem of great impact.

The technical solution of the utility model is as follows:

a new valve body comprises a valve shell, a valve rod, a sliding block, an elastic piece and a limiting block;

the valve rod is arranged in the valve casing, the sliding block cover is in on the valve rod and will first cavity and second cavity are separated into to the valve casing lie in on the valve rod lie in the both sides of sliding block are equipped with a set ofly respectively the elastic component with the stopper, the stopper is fixed on the valve rod, elastic component one end with the stopper butt, the other end with the sliding block butt is located two between the stopper be equipped with logical oil groove in the periphery of valve rod, follow the axial of valve rod, the sectional area of leading to the oil groove is crescent to both ends by the centre.

Further, along the axial of valve rod, the degree of depth of logical oil groove is crescent to both ends from the centre.

Or, along the axial direction of the valve rod, the width of the oil through groove is gradually increased from the middle to the two ends.

Further, the stopper includes the valve rod fixed part and sets up on the valve rod fixed part and to the convex sliding block butt portion in sliding block one side, the valve rod fixed part with sliding block butt portion forms the elastic component and holds the chamber, be equipped with the intercommunication on the stopper the elastic component hold the chamber with first cavity or the oil through hole of second cavity.

Specifically, the elastic member is a coil spring or a disc spring.

Compared with the prior art, the novel valve body has the following advantages: be equipped with on the valve rod along the valve rod axial by the middle oil groove that leads to of both ends crescent, and then make the damping valve reduce gradually or the pressure differential at damping valve both ends is by the in-process of little grow gradually by the pressure differential at damping valve both ends, the flow through leading to the oil groove all can even change, and then has avoided appearing the flow sudden change, causes the problem of great impact.

Drawings

Fig. 1 is a schematic structural diagram of a novel valve body disclosed in an embodiment of the present invention;

FIG. 2 is a schematic structural view of another oil through groove of the valve body;

fig. 3 is a schematic structural diagram of the limiting block.

In the figure: 1. valve case, 10, first cavity, 11, second cavity, 2, valve rod, 20, logical oil groove, 3, sliding block, 4, elastic component, 5, stopper, 50, valve rod fixed part, 51, sliding block butt joint portion, 52, elastic component hold the chamber, 53, logical oilhole.

Detailed Description

A new valve body is shown in figure 1 and comprises a valve shell 1, a valve rod 2, a sliding block 3, an elastic piece 4 and a limiting block 5;

the valve rod 2 is installed on an external component, one end of the valve rod 2 is arranged in the valve shell 1, the valve rod 2 can reciprocate in the valve shell 1, the sliding block 3 is sleeved on the valve rod 2 and divides the valve shell 1 into a first cavity 10 and a second cavity 11, liquid such as hydraulic oil is filled in the first cavity 10 and the second cavity 11, a group of elastic pieces 4 and limiting pieces 5 are arranged on the valve rod 2 and located on two sides of the sliding block 3 respectively, the limiting pieces 5 are fixed on the valve rod 2, one end of each elastic piece 4 is abutted to the corresponding limiting piece 5, the other end of each elastic piece is abutted to the corresponding sliding block 3, and each elastic piece is a spiral spring or a disc spring. Two sets of elastic component exert the effort from both ends to the sliding block for the sliding block is located two stopper intermediate positions when receiving the same oil pressure, is located two between the stopper 5 be equipped with the logical oil groove 20 of the first cavity 10 of intercommunication and second cavity 11 in the periphery of valve rod 2, follow the axial of valve rod 2, the sectional area of leading to oil groove 20 is crescent to both ends by the centre. Specifically, as shown in fig. 1, the depth of the oil through groove 20 gradually increases from the middle to both ends in the axial direction of the valve stem. Alternatively, as shown in fig. 2, the width of the oil groove 20 is gradually increased from the middle to both ends in the axial direction of the valve stem. The working principle of the valve body is as follows, when the oil pressure in the first cavity 10 and the second cavity 11 is the same, the sliding block 3 is located at the central position of the two limiting blocks 5, the effective flow path area of the oil through groove 20 is the minimum at the moment, and at the moment, the flow of hydraulic oil from one cavity to the other cavity is less. When the oil pressure of the first chamber 10 is different from that of the second chamber 11, the example that the oil pressure of the first chamber 10 is greater than that of the second chamber 11 is taken as an example to explain, when the oil pressure of the first chamber 10 is greater than that of the second chamber 11, the sliding block 3 gradually moves towards one side of the second chamber 11 under the pushing of the hydraulic oil, at this time, the effective flow path area of the oil through groove 20 is gradually increased to play a damping role, so that the oil pressure of the first chamber 10 and the oil pressure of the second chamber 11 gradually change, after the oil pressure of the first chamber 10 is suddenly reduced, the sliding block 3 gradually moves from one side of the second chamber 11 to an intermediate position under the action of the elastic element, at this time, the effective flow path area of the oil through groove 20 is gradually reduced to play a reverse damping role, therefore, the rapid change of the hydraulic oil flow of the first chamber 10 and the second chamber 11 is avoided, and the safety of the. When the oil pressure in the first chamber 10 is less than the oil pressure in the second chamber 11, the operation of the valve is identical to that described above and will not be described in detail.

Further, as shown in fig. 3, the stopper 5 includes a valve rod fixing portion 50 and a sliding block abutting portion 51 provided on the valve rod fixing portion 50 and protruding toward the sliding block 3 side, the valve stem fixing portion 50 and the slide block abutting portion 51 form an elastic member accommodating chamber 52, an oil passage hole 53 is provided in the valve rod fixing portion 50 or the slide block abutting portion 51 to communicate the elastic member accommodating chamber 52 with the first chamber 10 or the second chamber 11, when the slide block 3 is pushed by the hydraulic oil to slide to one side, when the slide block 3 moves to abut against the slide block abutting portion 51, the flow path area of the oil passage groove 20 reaches the maximum, and at this time, in order to ensure the communication between the first chamber 10 and the second chamber 11, an oil hole 53 having a cross-sectional area larger than the largest cross-sectional area of the oil passage is formed in the valve rod fixing portion 50 or the slide block contact portion 51.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A new valve body comprises a valve shell, a valve rod, a sliding block, an elastic piece and a limiting block; the method is characterized in that:

2. The new valve body of claim 1, wherein:

along the axial of valve rod, the degree of depth of logical oil groove is crescent to both ends from the centre.

3. The new valve body of claim 1, wherein:

along the axial of valve rod, the width of logical oil groove is crescent to both ends from the centre.

4. The new valve body according to any one of claims 1 to 3, characterized in that:

the stopper includes valve rod fixed part and sets up on the valve rod fixed part and to convex sliding block butt portion in sliding block one side, the valve rod fixed part with sliding block butt portion forms the elastic component and holds the chamber, be equipped with the intercommunication on the stopper the elastic component hold the chamber with first cavity or the oil through hole of second cavity.

5. The new valve body of claim 4, wherein:

the elastic piece is a spiral spring or a disc spring.