Self-operated micro-pressure single-seat sleeve adjusting valve

Abstract

The self-operated micro-pressure single-seat sleeve adjusting valve comprises a valve body, a medium inlet and a medium outlet are formed in the two ends of the valve body respectively, a valve seat is arranged in the valve body, and a valve element assembly is arranged below the valve seat; the valve element assembly is connected with the valve rod, and the valve rod penetrates through the corrugated pipe balance part. A single-seat sleeve is arranged on the periphery of the corrugated pipe balance part, the bottom of the single-seat sleeve is connected with a valve deck, and the valve deck is connected with a base. An actuator is arranged at the upper end of the single-seat sleeve, a spring is arranged in the actuator, the spring is fixed to a spring seat, and the spring seat is fixed to the interior of the fixing disc. The micro-pressure regulating valve has the advantages of being compact in structure, accurate in pressure regulation, small in influence of air inflow fluctuation, convenient to install, good in sealing effect of the valve body and the like, and can be widely applied to the technical field of micro-pressure regulation of gas or liquid such as petrochemical engineering, electric power and steam.

Description

TECHNICAL FIELD

[0001] The utility model belongs to self -operated type governing valve technical field, concretely relates to a self -operated type micro pressure single seat sleeve governing valve. BACKGROUND

[0002] Self -operated type micro pressure governing valve is a kind of without additional energy and control system, utilize medium self -pressure or temperature variation drive, can according to system pressure variation automatic adjustment valve opening to keep set pressure, realize the effect of accurate control pressure, can be applicable to the working occasion needing low pressure or micro pressure pressure variation.

[0003] Patent application number "201921812159.8" discloses a kind of high-precision self-standing micro pressure governing valve, including valve body, valve seat, valve core, valve cover, valve stem, and pressure guide pipe;The valve seat and valve stem are installed in the valve body;Valve core is installed on the valve stem;The valve body is connected with valve cover by bolt;The valve body and valve cover are installed with small diaphragm;Pressure guide pipe is installed on the side of the valve body;The valve body is connected with pressure guide pipe by bolt, with very high sensitivity, reaction speed block, the characteristics of high adjustment accuracy.Patent application number "201821067519.1" also introduces a kind of fluorine lining self -operated type micro pressure governing valve, including valve body, valve stem, valve core, sleeve, valve cover, actuator, spring, spring seat and adjusting screw, the micro pressure governing valve structure is simple, installation is convenient, improve the sealing performance of regulating valve by multilayer sealing arrangement, and by the unique sleeve and actuator design, the adjustment sensitivity of micro pressure governing valve is significantly improved, improve the service life and use effect of regulating valve.However, the current existing self -operated type micro pressure governing valve requires higher inlet pressure, when inlet pressure is unstable, it can cause the position of valve core inside regulating valve to deviate, thereby affecting the accuracy of regulating pressure;In addition, the sealing effect in the existing valve body is not very good, after using for a period of time, it will be. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the insufficient in the prior art, provide a kind of self -operated type micro pressure single seat sleeve governing valve, with Compact structure, pressure regulating accuracy, little by medium pressure fluctuation Influence, installation is convenient and the characteristics such as good valve body sealing effect, can be widely used in petrochemical industry, electric power, steam etc. Micro pressure pressure regulating technical field of gas or liquid.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme: A self-operated micro-pressure single seat sleeve adjusting valve, including valve body, the both ends of valve body are equipped with medium inlet and medium outlet respectively, inside is equipped with valve seat, the valve core assembly is equipped with below valve seat, the valve core assembly connects valve rod, the valve rod passes through bellows balance piece, the periphery of bellows balance piece is equipped with single seat sleeve, the bottom of single seat sleeve is connected with valve cover, the valve cover is connected with base, the upper end of single seat sleeve is equipped with actuator, the inside of actuator is equipped with spring, the spring is fixed on spring seat, the spring seat is fixed in fixed disc inside, the inside of fixed disc is equipped with elastic adjusting piece, the top of valve rod is fixedly connected in the middle, the actuator can control valve rod to move up and down, and micro-pressure regulation is completed.

[0006] As an improvement, the medium inlet is located on the left side of the valve body, the medium outlet is located on the right side of the valve body, and both are circular flange structure, and are fixedly connected with the inlet pipeline and the outlet pipeline respectively through the circular holes uniformly distributed on the flange.

[0007] As an improvement, the valve core assembly is connected with the valve seat in a bevel line.

[0008] As an improvement, the valve seat and the valve body are connected between the sealing gasket, the sealing gasket is high-pressure-resistant paperboard, and the thickness is 1-3mm.

[0009] As an improvement, the valve cover and the valve body are connected by bolts, and the bolts are provided with 6-8, and the size is M10-M16mm.

[0010] As an improvement, the single seat sleeve and the actuator are connected by the internal hexagon bolt, and a plurality of O-shaped sealing rings are arranged at the connecting position.

[0011] As an improvement, the actuator includes an upper diaphragm and a lower diaphragm, and is connected by a plurality of sealing bolt assemblies around the periphery.

[0012] As an improvement, the lower diaphragm is provided with a pressure tapping connection port.

[0013] As an improvement, the top of the actuator is provided with a sealing cover, and the lower side of the sealing cover is provided with an adjusting screw.

[0014] As an improvement, the lower side of the fixed disc is provided with a limiting sleeve, and the limiting sleeve is sleeved on the valve rod.

[0015] The self-operated micro-pressure single seat sleeve regulating valve has the advantages of compact structure, accurate pressure regulation, small influence of medium pressure fluctuation, convenient installation, good valve body sealing effect and the like. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the self-operated micro-pressure single seat sleeve regulating valve.

[0017] In the drawing: 1, valve body, 2, medium inlet, 3, medium outlet, 4, valve seat, 5, valve core assembly, 6, valve rod, 7, corrugated tube balancing piece, 8, single seat sleeve, 9, valve cover, 10, base, 11, actuator, 12, spring, 13, spring seat, 14, fixed disc, 15, elastic adjusting piece, 16, round hole, 17, sealing gasket, 18, bolt, 19, inner hexagonal bolt, 20, O-shaped sealing ring, 21, sealing bolt assembly, 22, pressure taking pipe connecting port, 23, sealing cover, 24, adjusting screw, 25, limiting sleeve, 111, upper diaphragm, 112, lower diaphragm. DETAILED DESCRIPTION

[0018] The preferred embodiment of the utility model will be described in detail in combination with the drawings.

[0019] As Figure 1 shown, the self-operated micro-pressure single seat sleeve regulating valve of the embodiment comprises a valve body 1, the valve body 1 is respectively provided with a medium inlet 2 and a medium outlet 3 at both ends, is provided with a valve seat 4 inside, and is provided with a valve core assembly 5 below the valve seat 4; the valve core assembly 5 is connected with a valve rod 6, the valve rod 6 passes through a corrugated tube balancing piece 7; the corrugated tube balancing piece 7 is provided with a single seat sleeve 8 around, the single seat sleeve 8 is connected with a valve cover 9 at the bottom, and the valve cover 9 is connected with a base 10; the single seat sleeve 8 is provided with an actuator 11 at the upper end, the actuator 11 is provided with a spring 12 inside, the spring 12 is fixed on a spring seat 13, and the spring seat 3 is fixed inside a fixed disc 14; the fixed disc 14 is provided with an elastic adjusting piece 15 inside, the top of the valve rod 6 is fixedly connected in the middle, the valve rod 6 can be controlled to move up and down through the actuator 11, and micro-pressure regulation is completed.

[0020] Further, the medium inlet 2 is located on the left side of the valve body, the medium outlet 3 is located on the right side of the valve body, and both are circular flange structures and are fixedly connected with the inlet pipeline and the outlet pipeline respectively through the circular holes 16 uniformly distributed on the flanges; specifically, the circular holes 16 are circumferentially distributed, and there are 6-10 of them, and the size is φ10-φ22mm; more specifically, the flanges of the medium inlet 2 and the medium outlet 3 are in a stepped structure, and the stepped part can place a sealing ring to be sealingly connected with the inlet pipeline and the outlet pipeline.

[0021] Further, the valve core assembly 5 is connected with the valve seat 4 in a bevel line, and through the bevel line connection structure, the contact area is increased, which can quickly achieve complete sealing effect when the regulating valve needs to be completely closed, and the sealing stability is improved.

[0022] Further, the valve seat 4 and the valve body 1 are connected with a sealing gasket 17, the sealing gasket 17 is a high-pressure-resistant paper board, and the thickness is 1-3mm, preferably 1-1.5mm, which ensures the sealing property through the sealing gasket of high-pressure-resistant paper board material, and reduces the cost of the sealing gasket.

[0023] Further, the valve cover 9 and the valve body 1 are connected through the bolts 18, and the bolts 18 are provided in a total of 6-8, and the size is M10-M16mm.

[0024] Further, the single seat sleeve 8 and the actuator 11 are connected through the inner hexagonal bolts 19, and a plurality of O-shaped sealing rings 20 are arranged at the connection; specifically, the O-shaped sealing ring 20 is made of butyronitrile rubber material.

[0025] Further, the actuator 11 includes an upper diaphragm 111 and a lower diaphragm 112, and is connected through a plurality of sealing bolt assemblies 21 around the periphery; specifically, the lower diaphragm 112 is provided with a pressure tapping connection port 22, and the pressure tapping pipeline is connected through the pressure tapping connection port 22 to feedback the regulated pressure in real time; further, the actuator 11 is provided with a sealing cover 23 at the top, and the sealing cover 23 is provided with an adjusting screw 24 below, which adjusts the height of the valve stem, so as to be suitable for different medium and pressure use environments.

[0026] Further, the fixed disc 14 is provided below with a limiting sleeve 25, and the limiting sleeve 25 is sleeved on the valve stem 6; specifically, the limiting sleeve 25 is fixed at the inner step of the single seat sleeve 8, and the limiting sleeve 25 prevents the fixed disc 14 from continuously sliding downward to ensure that the regulating valve works normally within the set pressure regulating range.

[0027] The self-operated micro-pressure single seat sleeve adjusting valve has the characteristics of compact structure, accurate pressure regulation, small influence of medium pressure fluctuation, convenient installation, good valve body sealing effect and the like, adopts the valve core and balanced bellows combined pressure regulating structure, greatly improves the pressure control precision, when the external medium pressure fluctuates, the balanced bellows can eliminate the pressure fluctuation through self-adjustment, avoids causing the displacement of the valve core, guarantees the continuous and accurate pressure output control of the valve core, and can be widely used in the micro-pressure pressure regulating technical field of gas or liquid such as petroleum chemical industry, electric power and steam.

[0028] Finally, it should be noted that the above enumeration is only a specific embodiment of the present application. Obviously, the present application is not limited to the above embodiments, but can have many variations. All variations that can be directly derived or inferred from the content disclosed in the present application by those of ordinary skill in the art should be considered as falling within the scope of protection of the present application.

Claims

1. A self-operated micro-pressure single seat sleeve regulating valve, comprising a valve body (1), a medium inlet (2) and a medium outlet (3) are arranged at both ends of the valve body (1) respectively, a valve seat (4) is arranged inside, a valve core assembly (5) is arranged below the valve seat (4); characterized in that, The valve core assembly (5) is connected with a valve stem (6), the valve stem (6) passes through a corrugated tube balance (7), the corrugated tube balance (7) is provided with a single seat sleeve (8) on the periphery, the single seat sleeve (8) is connected with a valve cover (9) at the bottom, the valve cover (9) is connected with a base (10), the single seat sleeve (8) is provided with an actuator (11) at the upper end, the actuator (11) is provided with a spring (12) inside, the spring (12) is fixed on a spring seat (13), the spring seat (13) is fixed inside a fixed disc (14), the fixed disc (14) is provided with an elastic adjusting piece (15) inside, the top of the valve stem (6) is fixedly connected in the middle, the actuator can control the up and down movement of the valve stem, and the micro pressure regulation is completed.

2. The self-contained micro-pressure single seat cartridge regulator valve according to claim 1, wherein, The medium inlet (2) is located on the left side of the valve body, the medium outlet (3) is located on the right side of the valve body, and both are circular flange structures, and are fixedly connected with the inlet pipeline and the outlet pipeline through the circular holes (16) uniformly distributed on the flanges.

3. The self-contained micro-pressure single seat cartridge regulator valve according to claim 1, wherein, The valve core assembly (5) and the valve seat (4) are connected in a way of oblique tangent line intersection.

4. The self-contained micro-pressure single seat sleeve valve according to claim 3, wherein, The valve seat (4) and the valve body (1) are connected through a sealing gasket (17), the sealing gasket (17) is a high-pressure-resistant paper board, and the thickness is 1-3 mm.

5. The self-contained micro-pressure single seat cartridge regulator valve according to claim 1, wherein, The valve cover (9) and the valve body (1) are connected through bolts (18), and the bolts (18) are provided with 6-8, and the size is M10-M16 mm.

6. The self-contained micro-pressure single seat sleeve valve according to claim 1, wherein, The single seat sleeve (8) and the actuator (11) are connected through a hexagonal bolt (19), and a plurality of O-shaped sealing rings (20) are arranged at the connecting position.

7. The self-contained micro-pressure single seat sleeve valve according to claim 1, wherein, The actuator (11) comprises an upper diaphragm (111) and a lower diaphragm (112), and is connected through a plurality of sealing bolt assemblies (21) on the periphery.

8. The self-contained micro-pressure single seat sleeve valve according to claim 7, wherein, The lower diaphragm (112) is provided with a pressure tapping connection port (22).

9. The self-contained micro-pressure single seat cartridge control valve according to claim 1, wherein, The actuator (11) is provided with a sealing cover (23) at the top, and an adjusting screw (24) is arranged below the sealing cover (23).

10. The self-contained micro-pressure single seat cartridge regulator valve according to claim 1, wherein, The fixed disc (14) is provided with a limiting sleeve (25) below, and the limiting sleeve (25) is sleeved on the valve stem (6).

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