CN219796155U

CN219796155U - Electric regulating valve

Info

Publication number: CN219796155U
Application number: CN202321015121.4U
Authority: CN
Inventors: 林健民; 王宗杰; 魏峰; 高胜; 江航; 林振灿; 蓝飞龙; 张少芹
Original assignee: Fuzhou Xin'ao Tena Science & Technology Co ltd
Current assignee: Fuzhou Xin'ao Tena Science & Technology Co ltd
Priority date: 2023-04-28
Filing date: 2023-04-28
Publication date: 2023-10-03
Anticipated expiration: 2033-04-28

Abstract

The utility model discloses an electric regulating valve, which belongs to the field of electric regulating valves, and comprises a valve body, wherein the valve body is of a hollow cube structure and is provided with openings at two sides, a valve cover of a tubular structure is vertically arranged on the upper surface of the valve body, a valve core is inserted in the valve cover, one end of the valve core extends into the valve body, the other end of the valve core extends out of the valve body and is provided with an electric actuator, a lubricating cavity of an annular structure is formed in the inner side of the valve cover, a packing layer surrounding the valve core is arranged on the lower surface of the lubricating cavity, an oil injection pipe is inserted in the lubricating cavity, one end of the oil injection pipe extends out of the valve cover and is provided with an oil supply mechanism, a one-way valve positioned outside the valve cover is arranged on the outer side of the oil injection pipe, and can form a protective layer on the exposed surface of the valve core by lubricating grease to resist the rust action caused by external moisture air, so that maintenance frequency can be reduced, and maintenance cost of the valve core in the electric regulating valve can be reduced.

Description

Electric regulating valve

Technical Field

The utility model relates to the field of electric regulating valves, in particular to an electric regulating valve.

Background

The electric regulating valve is an important execution unit instrument in industrial automation process control, and is formed by connecting and combining an electric executing mechanism and a regulating valve, mechanically connecting, assembling, debugging and installing, and receiving a driver signal to control the valve for regulation, and also can form an intelligent network control system according to control requirements, so that the remote monitoring is realized by optimizing control;

according to patent search, chinese patent with publication number of CN217762327U discloses an electric regulating valve, which comprises a valve body, an electric actuator and a valve rod connected with the electric actuator, wherein the upper end of the valve body is provided with a valve cover, the valve cover and the valve body are fixedly bolted through bolts, a bracket is fixedly arranged at the upper end of the valve cover, the electric actuator is fixedly arranged at the upper end of the bracket, one end of the valve rod penetrates through the valve cover and is positioned in the valve body and is fixedly connected with a valve plug, the valve plug is in sliding connection with the inner wall of the valve body, a through hole for the valve rod to penetrate through is formed in the valve cover, a sealing assembly is arranged on the outer wall of one end of the valve rod, a groove is formed in the valve body, an annular sealing gasket is fixedly adhered in the groove, although the valve rod and the valve cover are sealed through the cooperation of a first sealing ring and a second sealing ring in the sealing assembly, and the lubricating degree of the outer wall of the valve rod and the first sealing ring and the second sealing ring are increased, and the valve body are sealed through the annular clamping groove, the rubber gasket and an annular bump arranged on the valve cover and the valve body, so that leakage between the valve cover and the valve body is avoided due to the penetration of flowing medium in the valve body and the valve body;

however, when the valve rod is lubricated, the lubricating degree of the outer wall of the valve rod, the first sealing ring and the second sealing ring is increased through the graphite gasket, the valve rod can be extended out when the electric regulating valve is opened, the electric regulating valve is exposed in the air and is subjected to the rust action of moist air, lubricating grease needs to be smeared regularly for maintenance, and the problem of increasing the maintenance cost of the valve rod in the electric regulating valve is caused.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the utility model aims to provide an electric regulating valve, which can form a protective layer on the exposed surface of a valve core by using lubricating grease to resist the rust effect caused by outside humid air, reduce the maintenance frequency and reduce the maintenance cost of the valve core in the electric regulating valve.

2. Technical proposal

In order to solve the problems, the utility model adopts the following technical scheme.

The utility model provides an electric control valve, includes the valve body, the valve body is hollow cube structure and both sides all open, the valve gap that is tubular structure is installed perpendicularly to the upper surface of valve body, the inside of valve gap is inserted and is equipped with the case, the one end of case extends into the valve body inside, the other end of case extends the inside of valve body and is provided with electric actuator, the lubrication chamber that is annular structure has been seted up to the inboard of valve gap, the lower surface of lubrication chamber is provided with the packing layer around the case, the inside of lubrication chamber is inserted and is equipped with the filler pipe, the one end of filler pipe extends the inside just being provided with of valve gap oil feeding mechanism, the outside of filler pipe is installed and is located the outside check valve of valve gap.

Further, the oil supply mechanism comprises a lubricating oil cylinder sleeved at one end of the oil filling pipe, an extrusion spring is arranged on the upper wall of the lubricating oil cylinder, and one end of the extrusion spring extends downwards along the axial direction and is provided with a piston.

Furthermore, the lower surface of the lubricating oil cylinder is provided with an oil delivery pipe in a penetrating way, and the outer side of the oil delivery pipe is provided with a valve.

Further, the upper end thread of the valve cover is provided with a packing screw with an annular structure, and one end of the packing screw extends into the valve cover and is adhered with a coaxial sealing gasket.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages that:

(1) When this scheme valve body is opened, the outside ration of electric actuator pulls out the case, the packing layer shutoff gap reduces the condition of leaking and takes place, the case is at this moment along the valve gap displacement to be stained with the lubricating grease in the lubrication chamber, lubricating grease lubricates the contact surface of valve gap and case, can form the protective layer at the naked surface of case with lubricating grease, resists the corrosion effect that external moisture air brought, can reduce maintenance frequency, with the maintenance cost of valve core in the reduction electric control valve, and restrict the fluidic flow direction in the filler pipe with the check valve, avoid the liquid in the valve body to leak along the filler pipe.

(2) When lubricating grease is consumed in the lubricating cavity, the internal pressure is reduced, a pressure difference is formed between the lubricating grease and the lubricating oil cylinder, the piston is pressed down under the action of elastic potential energy of the extrusion spring to extrude the lubricating grease of the lubricating oil cylinder, pressure relief is carried out, and the lubricating grease enters the lubricating cavity along the oil injection pipe and the one-way valve to balance the pressure difference, so that the lubricating grease can be conveniently and automatically added into the lubricating cavity.

Drawings

FIG. 1 is a schematic diagram of a front view of the present utility model;

FIG. 2 is a schematic bottom view of the present utility model;

FIG. 3 is a schematic cross-sectional view of the present utility model;

fig. 4 is an enlarged schematic view of the structure of fig. 3 a according to the present utility model.

The reference numerals in the figures illustrate:

1. a valve body; 2. a valve cover; 3. a valve core; 4. a lubrication chamber; 5. a filler layer; 6. a filler pipe; 7. a one-way valve; 8. a lubrication cylinder; 9. extruding a spring; 10. a piston; 11. an oil delivery pipe; 12. a valve; 13. a filler screw; 14. a sealing gasket; 15. and a vertical rod.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.

Examples:

referring to fig. 1-4, an electric control valve comprises a valve body 1, the valve body 1 is of a hollow cube structure, openings are formed in two sides of the valve body 1, a valve cover 2 of a tubular structure is vertically arranged on the upper surface of the valve body 1, a valve core 3 is inserted into the valve cover 2, one end of the valve core 3 extends into the valve body 1, the other end of the valve core 3 extends out of the valve body 1 and is provided with an electric actuator, a lubricating cavity 4 of an annular structure is formed in the inner side of the valve cover 2, a packing layer 5 surrounding the valve core 3 is arranged on the lower surface of the lubricating cavity 4, an oil injection pipe 6 is inserted into the lubricating cavity 4, one end of the oil injection pipe 6 extends out of the valve cover 2 and is provided with an oil supply mechanism, a one-way valve 7 positioned outside the valve cover 2 is firstly used for adding enough lubricating grease into the lubricating cavity 4, when the valve body 1 is opened, the electric actuator quantitatively pulls out the valve core 3 outwards, a gap between the valve core 3 and the lower end of the valve cover 2 is blocked by the electric actuator, the valve core 3 displaces along the valve cover 2, lubricating grease in the lubricating cavity 4 is adhered to the lower surface of the lubricating cavity 4, the lubricating cavity 2 is provided with a packing layer 5, the oil layer 5 surrounding the valve core 3 is contacted with the valve core 3, the surface of the valve core 3 is prevented from being exposed by the lubricating oil, the lubricating valve body is prevented from flowing out of the liquid in the valve body 6, the outer side of the valve body is prevented from being exposed by the electric control valve, the lubricating valve is prevented from flowing towards the valve 6, and the external air is prevented from being exposed by the valve body, the external surface is protected by the valve body 6, and the valve is protected.

Referring to fig. 1, when the electric actuator works, the external pressure sensor measures the controlled pressure and converts the controlled pressure into a voltage signal, the intelligent PID regulator compares the signal reflecting the pressure with a given pressure value to generate a deviation signal, the deviation signal acts on the electric regulating valve through the pressure controller, the pressure of a measured point is regulated to a given theoretical value through changing the pressure of the measured point, the electric actuator is controlled by a control signal of 4-20ma current, the valve core 3 is driven to displace for a specified distance, and the opening degree of the valve body 1 is conveniently and quantitatively regulated.

Referring to fig. 3, the oil supply mechanism includes a lubrication cylinder 8 sleeved at one end of the oil injection pipe 6, an extrusion spring 9 is installed on the upper wall of the lubrication cylinder 8, one end of the extrusion spring 9 extends downwards along the axial direction and is provided with a piston 10, sufficient lubrication grease is firstly added into the lubrication cylinder 8, when the lubrication grease is consumed in the lubrication cavity 4, the internal pressure is reduced, a pressure difference is formed between the lubrication grease and the lubrication cylinder 8, the piston 10 is pressed down under the action of elastic potential energy of the extrusion spring 9 to extrude the lubrication grease of the lubrication cylinder 8, pressure relief is performed, and the lubrication grease enters the lubrication cavity 4 along the oil injection pipe 6 and the one-way valve 7 to balance the pressure difference, so that the lubrication grease is conveniently and automatically added into the lubrication cavity 4.

Referring to fig. 1 and 2, an oil delivery pipe 11 is installed on the lower surface of the lubricating oil cylinder 8 in a penetrating manner, a valve 12 is arranged on the outer side of the oil delivery pipe 11, with consumption of lubricating grease in the lubricating oil cylinder 8, a worker needs to open the valve 12 regularly, suck the lubricating grease by an injector, input the lubricating grease into the lubricating oil cylinder 8 along the oil delivery pipe 11 to supplement the lubricating grease, and close the valve 12 after the supplement is completed.

Referring to fig. 1 and 3, the diameter of the piston 10 is larger than that of the lubrication cavity 4, so that the reserve of lubricating grease in the lubrication cylinder 8 is larger than that in the lubrication cavity 4, the lubrication cylinder 8 can add lubricating grease to the lubrication cavity 4 more than once, the length of the oil delivery pipe 11 is larger than that of the oil injection pipe 6, the oil injection pipe 6 can drive the valve 12 to hang above the valve body 1, and the valve is not contacted with the valve core 3, so that the movement of the valve core 3 is prevented from being interfered.

Referring to fig. 4, a packing screw 13 with a ring structure is installed at the upper end of the valve cover 2, one end of the packing screw 13 extends into the valve cover 2 and is adhered with a coaxial sealing gasket 14, the packing screw 13 is screwed on the upper end of the valve cover 2 along the screw thread, and the sealing gasket 14 can be driven to be inserted and fastened in the valve cover 2 so as to close the upper opening of the lubrication cavity 4.

Referring to fig. 3 and 4, one end of the packing screw 13 is further provided with a plurality of vertical rods 15 along a circumferential array, one end of each vertical rod 15 axially penetrates through the sealing gasket 14 and tightly abuts against the upper surface of the packing layer 5, and when the packing screw 13 is screwed down, the plurality of vertical rods 15 are driven to downwards press the packing layer 5 to limit, so that the packing layer 5 is prevented from floating upwards under the action of the pressure of the fluid in the valve body 1 to block the oil filling pipe 6.

Working principle: when the valve body 1 is opened, the valve core 3 is pulled out by the electric actuator outwards and quantitatively, the gap between the valve core 3 and the lower end of the valve cover 2 is plugged by the packing layer 5, leakage is reduced, the valve core 3 is displaced along the valve cover 2 at the moment and is adhered with lubricating grease in the lubricating cavity 4, the contact surface of the valve cover 2 and the valve core 3 is lubricated by the lubricating grease, a protective layer can be formed on the exposed surface of the valve core 3 by using the lubricating grease to resist the rust effect caused by outside moisture air, the maintenance frequency can be reduced, the maintenance cost of the valve core 3 in the electric regulating valve is reduced, the flow direction of fluid in the oil filling pipe 6 is limited by using the one-way valve 7, and the leakage of the fluid in the valve body 1 along the oil filling pipe 6 is avoided.

When lubricating grease is consumed in the lubricating cavity 4, the internal pressure is reduced, a pressure difference is formed between the lubricating grease and the lubricating oil cylinder 8, the piston 10 is pressed down under the action of elastic potential energy of the extrusion spring 9 to extrude the lubricating grease of the lubricating oil cylinder 8 for pressure relief, and the lubricating grease enters the lubricating cavity 4 along the oil injection pipe 6 and the one-way valve 7 to balance the pressure difference, so that the lubricating grease can be conveniently and automatically added into the lubricating cavity 4.

The above description is only of the preferred embodiments of the present utility model; the scope of the utility model is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present utility model, and the technical solution and the improvement thereof are all covered by the protection scope of the present utility model.

Claims

1. An electric control valve, comprising a valve body (1), characterized in that: valve body (1) is hollow cube structure and both sides all open, valve gap (2) that are tubular structure are installed perpendicularly to the upper surface of valve body (1), valve core (3) are inserted to the inside of valve gap (2), valve core (3)'s one end extends into valve body (1) inside, valve core (3)'s the other end extends valve body (1) inside and is provided with electric actuator, lubricating cavity (4) that are annular structure are seted up to the inboard of valve gap (2), the lower surface of lubricating cavity (4) is provided with packing layer (5) around valve core (3), the inside cartridge of lubricating cavity (4) has filler pipe (6), the one end of filler pipe (6) extends valve gap (2) inside and is provided with oil feeding mechanism, one-way valve (7) that are located valve gap (2) outside are installed to the outside of filler pipe (6).

2. An electrically operated regulator valve as defined in claim 1, wherein: the oil supply mechanism comprises a lubricating oil cylinder (8) sleeved at one end of the oil filling pipe (6), an extrusion spring (9) is arranged on the upper wall of the lubricating oil cylinder (8), and one end of the extrusion spring (9) extends downwards along the axial direction and is provided with a piston (10).

3. An electrically operated regulator valve according to claim 2, wherein: the lower surface of the lubricating oil cylinder (8) is provided with an oil delivery pipe (11) in a penetrating way, and the outer side of the oil delivery pipe (11) is provided with a valve (12).

4. An electrically operated valve as defined in claim 3, wherein: the diameter of the piston (10) is larger than that of the lubricating cavity (4), and the length of the oil delivery pipe (11) is larger than that of the oil injection pipe (6).

5. An electrically operated regulator valve as defined in claim 1, wherein: the upper end thread of the valve cover (2) is provided with a packing screw (13) with an annular structure, and one end of the packing screw (13) extends into the valve cover (2) and is adhered with a coaxial sealing gasket (14).

6. An electrically operated valve as defined in claim 5, wherein: one end of the packing screw (13) is further provided with a plurality of vertical rods (15) in a circumferential array, and one ends of the vertical rods (15) axially penetrate through the sealing gasket (14) and tightly prop against the upper surface of the packing layer (5).