Precise balance valve

Abstract

The utility model relates to a precise balance valve which comprises a valve body, a valve core, a first piston, a first compression spring, a sealing nut, a second compression spring, a valve needle, a second piston and an adjusting nut, the valve body comprises an oil inlet hole, a balance cavity and an oil outlet hole, the valve core is arranged in the balance cavity in a threaded mode, the oil inlet hole is communicated with the balance cavity, and the oil outlet hole is communicated with the balance cavity. The valve element is provided with a pressure adjusting cavity and an adjusting cavity, the pressure adjusting cavity is aligned with the balance cavity, the adjusting cavity is communicated with the balance cavity, the sealing nut is installed on the valve element, the pressure adjusting cavity is communicated with the adjusting cavity through the sealing nut, one end of the first compression spring abuts against the first piston, the other end of the first compression spring abuts against the sealing nut, and one end of the second compression spring abuts against the second piston. And the valve needle is connected with the sealing nut in an abutting mode. The precise balance valve is simple in structure and convenient to maintain, the valve element is detachably arranged in the middle of the valve body, the valve element can be maintained and replaced without disassembling the valve body when the switching valve is maintained, and the time for maintaining the switching valve is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to precision balance valve technical field especially is related to a precision balance valve. BACKGROUND

[0002] Valve elements are widely used in industrial control systems, which are mainly used to control the pressure, flow, and flow direction of other parameters of medium.

[0003] The balance valve is a special function valve, and the valve itself has no special feature, only the use function and the place have the difference. In some industries, due to the existence of large pressure difference or flow difference of medium (all kinds of flowable substances) in each part of the pipeline or container, in order to reduce or balance the difference, the valve is installed between the corresponding pipeline or container to adjust the relative balance of the pressure on both sides, or through the method of shunting to achieve the balance of flow, which is called balance valve.

[0004] The balance valve switching valve can realize flexible liquid reversing flow, and is widely used in hydraulic medium conveying and coating equipment. The main features of the balance valve are compact structure, reliable sealing, simple structure, sealing surface and ball surface always in closed state, and it is also suitable for working conditions of medium water, natural gas, hydraulic oil and the like, and is widely used in various industries. The balance valve body can be integral or combined. The working principle of the balance valve: the balance valve only needs to rotate 90 degrees and a small torque to connect or cut off the medium of the pipeline, and in the conveying of hydraulic oil and other media to the same equipment, the proportion of the conveying medium in the use process of the equipment is out of proportion. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a precision balance valve, to solve the above technical problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The utility model relates to a precision balance valve, including valve body, valve core, first piston, first compression spring, sealing nut, second compression spring, valve needle, second piston and adjusting nut, the valve body includes oil inlet hole, balance cavity and oil outlet hole, the valve core is arranged in the balance cavity, the oil inlet hole is communicated with the balance cavity, the oil outlet hole is communicated with the balance cavity, be provided with pressure regulating chamber and adjusting chamber on the valve core, the pressure regulating chamber is aligned the balance cavity, the adjusting chamber is communicated with the balance cavity, the sealing nut is installed on the valve core, and the pressure regulating chamber is communicated with the adjusting chamber through the sealing nut, one end of the first compression spring is in abutment with the first piston, the other end is in abututment with the sealing nut, the valve needle, the second piston and the second compression spring are arranged in the adjusting chamber, the adjusting nut is installed in the adjusting chamber, one end of the second compression spring is in abutment with the second piston, the other end is in abutment with the valve needle, the valve needle is in abutment with the sealing nut, the valve core is provided with passageway, and the passageway is communicated with the balance cavity and the pressure regulating chamber.

[0008] As a preferred technical scheme, it further comprises a first sealing ring, the first sealing ring is sleeved on the outer surface of the valve core and abuts against the inner wall of the balance cavity.

[0009] As a preferred technical scheme, it further comprises a second sealing ring, the second sealing ring is sleeved on the outer surface of the second piston and abuts against the inner wall of the adjusting chamber.

[0010] As a preferred technical scheme, the adjusting nut is provided with a locking groove, and the locking groove is formed on one side of the adjusting nut.

[0011] As a preferred technical scheme, it further comprises a locking screw, the locking screw is arranged in the locking groove, and the locking screw is threadedly connected to the adjusting nut.

[0012] The precision balance valve has the advantages of simple structure, convenient maintenance, and the valve core can be maintained and replaced without disassembling the valve body when the maintenance switch valve is maintained, thereby reducing the maintenance time of the switch valve. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The utility model relates to a precision balance valve's sectional view. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is combined with the drawings and example, and the utility model is further detailed. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0015] As Figure 1 shown, a precise balance valve, including valve body 1, valve core 2, first piston 3, first compression spring 4, sealing nut 5, second compression spring 7, valve needle 6, second piston 8, adjusting nut 9, locking screw 10, first sealing ring 101 and second sealing ring 102, valve body 1 includes oil inlet hole 11, balance cavity 12 and oil outlet hole 13, valve core 2 is threaded in balance cavity 12, oil inlet hole 11 is communicated with balance cavity 12, oil outlet hole 13 is communicated with balance cavity 12, valve core 2 is provided with pressure regulating cavity 21 and adjusting cavity 22, pressure regulating cavity 21 is aligned with balance 12 cavity, adjusting cavity 22 is communicated with balance cavity 12, sealing nut 5 is installed on valve core 6, and pressure regulating cavity 21 is communicated with adjusting cavity 22 through sealing nut 5, one end of first compression spring 4 is abutted with first piston 3, and the other end is abutted with sealing nut 5, valve needle 6, second piston 8 and second compression spring 7 are arranged in adjusting cavity 22, adjusting nut 9 is installed in adjusting cavity 22, one end of second compression spring 7 is abutted with second piston 8, and the other end is abutted with valve needle 6, valve needle 6 is abutted with sealing nut 5, valve core 2 is provided with channel 23, channel 23 communicates balance cavity 12 with pressure regulating cavity 22, first sealing ring 101 is sleeved on the outer surface of valve core 2 and is abutted with the inner wall of balance cavity 12, second sealing ring 102 is sleeved on the outer surface of second piston 8 and is abutted with the inner wall of adjusting cavity 22, adjusting nut 9 is provided with locking groove 91, locking groove 91 is opened on one side of adjusting nut 9, locking screw 10 is penetrated in locking groove 91 and is threadedly connected on adjusting nut 9, so that locking screw 10 compresses and locks locking groove 91, and then locking screw 10 locks adjusting nut 9 and valve core 2.

[0016] When the balance valve is used, hydraulic oil enters from oil inlet hole 11, first piston 3 is pressed, first compression spring 4 is compressed, hydraulic oil flows from channel 23 to oil outlet hole 13 to flow out of the balance valve, when the pressure is too large, hydraulic oil extrudes valve needle 6, second compression spring 7 is compressed, hydraulic oil enters adjusting cavity 22 through sealing nut 5 and flows back to balance cavity 12 from adjusting cavity 22, so as to relieve pressure, when the pressure is too small, adjusting nut 9 is adjusted to regulate pressure, so that the pressure on both sides is in a balanced state.

[0017] The above-described embodiments are only preferred examples of the present application, and do not limit the scope of the present application, so equivalent changes or modifications made according to the structure, features and principles described in the patent application range of the present application should be included in the patent application range of the present application.

Claims

1. A precision balanced valve characterized by, The valve body, the valve core, the first piston, the first compression spring, the sealing nut, the second compression spring, the valve needle, the second piston and the adjusting nut, the valve body comprises an oil inlet hole, a balance cavity and an oil outlet hole, the valve core is arranged in the balance cavity, the oil inlet hole is communicated with the balance cavity, the oil outlet hole is communicated with the balance cavity, the valve core is provided with a pressure regulating cavity and an adjusting cavity, the pressure regulating cavity is aligned with the balance cavity, the adjusting cavity is communicated with the balance cavity, the sealing nut is installed on the valve core, and the pressure regulating cavity is communicated with the adjusting cavity through the sealing nut, one end of the first compression spring is in abutment with the first piston, and the other end is in abutment with the sealing nut, the valve needle, the second piston and the second compression spring are arranged in the adjusting cavity, the adjusting nut is installed in the adjusting cavity, one end of the second compression spring is in abutment with the second piston, and the other end is in abutment with the valve needle, the valve needle is in abutment with the sealing nut, the valve core is provided with a channel, and the channel communicates the balance cavity with the pressure regulating cavity.

2. The precision balance valve of claim 1, wherein, It further comprises a first sealing ring, the first sealing ring is sleeved on the outer surface of the valve core, and is in abutment with the inner wall of the balance cavity.

3. The precision balance valve of claim 1, wherein, It further comprises a second sealing ring, the second sealing ring is sleeved on the outer surface of the second piston, and is in abutment with the inner wall of the adjusting cavity.

4. The precision balance valve of claim 1, wherein, The adjusting nut is provided with a locking groove, and the locking groove is opened on one side of the adjusting nut.

5. The precision balance valve of claim 4, wherein, It further comprises a locking screw, the locking screw is arranged in the locking groove, and the locking screw is threadedly connected on the adjusting nut.

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