CN217683433U

CN217683433U - High-precision self-operated fluorine-lined pressure reducing valve

Info

Publication number: CN217683433U
Application number: CN202221287819.7U
Authority: CN
Inventors: 朱孝有; 胡晓峰
Original assignee: Zhejiang Yfm Valve Co ltd
Current assignee: Zhejiang Yfm Valve Co ltd
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2022-10-28
Anticipated expiration: 2032-05-26

Abstract

The utility model discloses a high accuracy self-operated lining fluorine relief pressure valve, including the valve body, the inside of valve body is equipped with the valve pocket, is equipped with the case in the valve pocket, and the inside of valve body installs the valve rod, and the valve rod passes the axle center of valve body, and the upper portion of valve body is equipped with the membrane lid, the interior bottom of membrane lid is equipped with the diaphragm, the interior top of membrane lid is equipped with the lifter plate, the top of membrane lid is equipped with adjusting bolt, and adjusting bolt's upper end is the free end, and adjusting bolt's lower extreme is connected with the lifter plate, is equipped with the spring between lifter plate and the diaphragm; the lower extreme of valve rod is installed at the interior bottom of valve body, and the upper end and the diaphragm of valve rod are connected. The utility model discloses realize the lift of valve rod, realize corroding steady voltage function behind the medium valve.

Description

High-precision self-operated fluorine-lined pressure reducing valve

Technical Field

The utility model relates to a relief pressure valve, in particular to high accuracy formula of relying on oneself fluorine relief pressure valve.

Background

The pressure reducing valve is a valve which reduces the inlet pressure to a certain required outlet pressure through regulation and leads the outlet pressure to be automatically kept stable by relying on the energy of the medium. From the viewpoint of hydrodynamics, the pressure reducing valve is a throttling element with variable local resistance, namely, the flow speed and the kinetic energy of fluid are changed by changing the throttling area to cause different pressure losses, thereby achieving the purpose of pressure reduction. Then, the fluctuation of the pressure behind the valve is balanced with the spring force by means of the regulation of the control and regulation system, so that the pressure behind the valve is kept constant within a certain error range. The action principle is as follows: the pressure reducing valve has local resistance to water flow in the flow passage to reduce water pressure, and the water pressure reducing range is regulated automatically with the water pressure difference between the film connected to the valve clack or the water inlet and outlet on two sides of the piston. The constant-ratio pressure reduction principle is that the water pressure ratio of a floating piston in a valve body is utilized to control, and the pressure reduction ratio of an inlet end and an outlet end is in inverse proportion to the area ratio of the inlet side and the outlet side. The pressure reducing valve works stably without vibration; the valve body is not provided with a spring, so that the valve body is not corroded and has no worry about metal fatigue failure; the sealing performance is good and leakage does not exist, so that the dynamic pressure and the static pressure are reduced; in particular, the water flow is not influenced while the pressure is reduced. The existing pressure reducing valve is inconvenient in lifting adjustment of a valve rod, and the pressure stabilizing function is poor after the valve is realized.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve the technical problem that prior art exists to a high accuracy formula of relying on oneself lining fluorine relief pressure valve of steady voltage function behind the medium valve is realized in the lift of realization valve rod is provided.

The above technical problem of the present invention can be solved by the following technical solutions:

a high-precision self-operated fluorine-lined pressure reducing valve comprises a valve body, wherein a valve cavity is arranged in the valve body, a valve core is arranged in the valve cavity, a valve rod is arranged in the valve body, the valve rod penetrates through the shaft center of the valve body, a membrane cover is arranged at the upper part of the valve body, a membrane is arranged at the inner bottom of the membrane cover, a lifting plate is arranged at the inner top of the membrane cover, an adjusting bolt is arranged at the top of the membrane cover, the upper end of the adjusting bolt is a free end, the lower end of the adjusting bolt is connected with the lifting plate, and a spring is arranged between the lifting plate and the membrane; the lower extreme of valve rod is installed at the interior bottom of valve body, and the upper end and the diaphragm of valve rod are connected.

Further, the membrane head cover comprises a membrane head lower cover and a membrane head upper cover, the membrane head lower cover and the membrane head upper cover are covered together, and the end parts of the two ends of the membrane are arranged between the two sides of the membrane head lower cover and the two sides of the membrane head upper cover.

Furthermore, a left flow passage is arranged at the lower part of one side of the valve body, the outer end of the left flow passage is a free end, and the inner end of the left flow passage is communicated with the valve cavity; the middle part of the other side of the valve body is provided with a right flow passage, the outer end of the right flow passage is a free end, and the inner end of the right flow passage is communicated with the valve cavity; the left flow passage and the right flow passage are inclined; the left runner and the right runner are arranged in parallel.

Furthermore, a limiting concave cavity is arranged at the inner bottom of the valve cavity, and the lower end of the valve rod is installed in the limiting concave cavity.

Furthermore, a top cover is arranged at the top of the membrane cover, a protective cover is arranged at the top of the top cover, and the adjusting bolt is arranged in the top cover and the protective cover; an adjusting nut is arranged between the adjusting bolt and the top of the top cover.

Furthermore, a positioning groove is formed in the top surface of the lifting plate, a positioning part is arranged at the lower end of the adjusting bolt, and the positioning part is installed in the positioning groove; the cross sections of the positioning groove and the positioning part are both triangular.

Furthermore, the outer peripheral surface of the lower part of the valve rod is provided with a limiting part, and the outer diameter of the limiting part is larger than the inner diameter of the end face of the lower end of the valve core.

Furthermore, a diaphragm pressure plate is arranged on the top surface of the diaphragm, a fixed plate is arranged between the lower end of the spring and the top surface of the diaphragm pressure plate, a fixed plate is arranged between the upper end of the valve rod and the bottom surface of the diaphragm, and fixed columns are arranged among the fixed plate, the diaphragm pressure plate and the fixed plate; a fixing nut is arranged between the fixing column and the fixing plate.

The high-precision self-operated lining fluorine pressure reducing valve adopting the technical scheme has the advantages that the pressure reducing process is as follows: when the pressure before the valve rises, the pressure in the membrane head rises while the medium flows through the valve cavity, at the moment, the membrane drives the valve rod to move upwards under the action of the medium pressure, the flowing sectional area of the valve is reduced, the flow speed and the flow are reduced, the pressure after the valve is reduced, the set pressure rating after the valve is reached, after the thrust of the spring in the membrane head is balanced with the medium pressure in the membrane head, the position of the valve rod is not moved, the pressure after the valve is stable, and the pressure stabilizing function after the valve is realized. And (3) boosting: when the pressure before the valve is reduced, the pressure in the membrane head is reduced while the medium flows through the valve cavity, at the moment, the membrane pushes the valve rod to move downwards under the action of the thrust of the spring, the flowing sectional area of the valve is increased, the flow speed and the flow are increased along with the increase of the flowing sectional area, the pressure after the valve is increased to reach the set rated value of the pressure after the valve, after the thrust of the spring in the membrane head is balanced with the pressure of the medium in the membrane head, the position of the valve rod is not moved, the pressure after the valve is stable, and the function of pressure stabilization after the valve is realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the high-precision self-operated fluorine-lined pressure reducing valve of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.

As shown in fig. 1, a high-precision self-operated fluorine-lined pressure reducing valve comprises a valve body 1, a valve cavity 10 is arranged inside the valve body 1, a valve core 3 is arranged in the valve cavity 10, a valve rod 2 is arranged inside the valve body 1, the valve rod 2 penetrates through the axial center of the valve body 1, a membrane cover is arranged on the upper portion of the valve body 1, a membrane 5 is arranged at the inner bottom of the membrane cover, a lifting plate 17 is arranged at the inner top of the membrane cover, an adjusting bolt 16 is arranged at the top of the membrane cover, the upper end of the adjusting bolt 16 is a free end, the lower end of the adjusting bolt 16 is connected with the lifting plate 17, and a spring 8 is arranged between the lifting plate 17 and the membrane 5; the lower extreme of valve rod 2 is installed at the interior bottom of valve body 1, and the upper end of valve rod 2 is connected with diaphragm 5.

The utility model discloses high accuracy formula of relying on oneself lining fluorine relief pressure valve in corrosive nature technology pipeline, has the strong corrosivity of resistant medium, plays the effect of stabilizing valve backpressure simultaneously, is a relief pressure valve of automatic control, high accuracy. Go up and down through adjusting bolt 16 and finely tune lifter plate 17, lifter plate 17's lift adjustment goes up and down through spring 8 and finely tunes diaphragm 5, and the medium flows through the inside of valve body 1, case 3 and membrane lid, and the medium flows into valve body 1, case 3 and membrane lid and medium outflow valve body 1, case 3 and membrane lid and upwards or move down diaphragm 5, and diaphragm 5 that upwards or move down drives valve rod 2 and carries out reciprocating motion along valve pocket 10. The action principle is that the pressure reduction process: when the pressure before the valve rises, the medium flows through the valve cavity 10, and simultaneously, the pressure in the membrane head also rises, at the moment, the membrane 5 drives the valve rod 2 to move upwards under the action of the medium pressure, the flowing sectional area of the valve is reduced, the flow speed and the flow are reduced, the pressure after the valve is reduced, the set pressure rating after the valve is reached, after the thrust of the spring 8 in the membrane head is balanced with the pressure of the medium in the membrane head, the position of the valve rod 2 is not moved, the pressure after the valve is stable, and the pressure stabilizing function after the valve is realized. And (3) boosting: when the pressure before the valve is reduced, the pressure in the membrane head is reduced while the medium flows through the valve cavity, at the moment, the membrane 5 pushes the valve rod 2 to move downwards under the action of the thrust of the spring 8, the flowing sectional area of the valve is increased, the flow speed and the flow are increased along with the increase of the flowing sectional area, the pressure after the valve is increased to reach the set pressure rating after the valve, the position of the valve rod 2 is not moved after the thrust of the spring 8 in the membrane head is balanced with the pressure of the medium in the membrane head, the pressure after the valve is stable, and the pressure stabilizing function after the valve is realized.

Preferably, the membrane head cover comprises a membrane head lower cover 4 and a membrane head upper cover 7, the membrane head lower cover 4 and the membrane head upper cover 7 are covered together, and the end parts of two ends of the membrane 5 are arranged between two sides of the membrane head lower cover 4 and two sides of the membrane head upper cover 7; the membrane head cover is assembled by the membrane head lower cover 4 and the membrane head upper cover 7.

Preferably, the lower part of one side of the valve body 1 is provided with a left runner 11, the outer end of the left runner 11 is a free end, and the inner end of the left runner 11 is communicated with the valve cavity 10; the middle part of the other side of the valve body 1 is provided with a right runner 12, the outer end of the right runner 12 is a free end, and the inner end of the right runner 12 is communicated with the valve cavity 10; the left flow passage 11 and the right flow passage 12 are inclined; the left runner 11 and the right runner 12 are arranged in parallel; the valve body 1 is convenient for flowing in or flowing out of a medium through the left flow passage 11 and the right flow passage 12.

Preferably, the inner bottom of the valve cavity 10 is provided with a limit concave cavity 13, and the lower end of the valve rod 2 is arranged in the limit concave cavity 13; the lower end of the valve rod 2 is limited and controlled through the limiting concave cavity 13.

Preferably, a top cover 14 is arranged on the top of the membrane cover, a protective cover 15 is arranged on the top of the top cover 14, and an adjusting bolt 16 is arranged in the top cover 14 and the protective cover 15; an adjusting nut 9 is arranged between the adjusting bolt 16 and the top of the top cover 14; the adjusting bolt 16 is protected by the top cover 14 and the protecting cover 15, and the adjusted adjusting bolt 16 is fixedly installed by the adjusting nut 9.

Preferably, a positioning groove 18 is arranged on the top surface of the lifting plate 17, a positioning part 19 is arranged at the lower end of the adjusting bolt 16, and the positioning part 19 is arranged in the positioning groove 18; the cross sections of the positioning groove 18 and the positioning part 19 are both triangular; the positioning part 19 at the lower end of the adjusting bolt 16 is positioned in the positioning groove 18; the lifting plate 17 is adjusted to be lifted by the lifting adjusting bolt 16.

Preferably, the lower peripheral surface of the valve rod 2 is provided with a limiting part 20, and the outer diameter of the limiting part 20 is larger than the inner diameter of the lower end face of the valve core 3; the stopper 20 performs stopper control of the reciprocating valve rod 2 to prevent the reciprocating valve rod 2 from being stopped.

Preferably, a diaphragm pressure plate 6 is arranged on the top surface of the diaphragm 5, a fixing plate 21 is arranged between the lower end of the spring 8 and the top surface of the diaphragm pressure plate 6, a fixing plate 22 is arranged between the upper end of the valve rod 2 and the bottom surface of the diaphragm 5, and a fixing column 23 is arranged among the fixing plate 22, the diaphragm 5, the diaphragm pressure plate 6 and the fixing plate 21; a fixing nut 24 is arranged between the fixing column 23 and the fixing plate 21; carry out fixed mounting through fixed plate 21 to the lower extreme of spring 8 and the top surface of diaphragm pressure disk 6, carry out fixed mounting through stationary blade 22 to the upper end of valve rod 2 and the bottom surface of diaphragm 5, carry out fixed mounting through fixed column 23 to stationary blade 22, diaphragm 5, diaphragm pressure disk 6 and fixed plate 21, firmly install fixed column 23 and fixed plate 21 through fixation nut 24, convenient equipment simultaneously.

The utility model discloses high accuracy is formula of relying on oneself lining fluorine relief pressure valve, through this valve top adjusting bolt's regulation, set for the valve back pressure value that needs realized, no matter the pressure risees before the valve still reduces, this valve all can be through the lift of membrane head internal pressure and the interact between the membrane head spring thrust, realizes the lift of valve rod to through the flow cross section area who changes the medium, realize stabilizing under appointed pressure value behind the valve always. Through the ingenious design, the pressure stabilizing function after the medium valve is corroded can be realized by fewer parts, and the device has the advantages of simple structure, flexible action, large adjustable range and the like. High accuracy formula of relying on oneself lining fluorine relief pressure valve has following characteristics in structural design: 1. the corrosion resistance is excellent: the valve body 1, the valve rod 2, the valve core 3, the membrane head lower cover 4 and the membrane 5 are all lined with polytetrafluoroethylene materials, so that the valve has excellent corrosion resistance, and the metal valve body and the valve cover are both provided with dovetail groove structures, so that the risk that the lining layer falls off under the negative pressure working condition is avoided. 2. The set value of the pressure after the valve is adjustable: the initial thrust value of the spring 8 is changed by rotating the adjusting nut 9, so that the set value adjustment of the pressure behind different valves can be realized, the valve is particularly suitable for process change, the set value can be directly adjusted on line without detaching the valve, and the operation and maintenance difficulty of a user in the using process is greatly reduced.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. A high-precision self-operated fluorine lining pressure reducing valve comprises a valve body, wherein a valve cavity is arranged in the valve body, and a valve core is arranged in the valve cavity;

the method is characterized in that: the valve body is internally provided with a valve rod, the valve rod penetrates through the shaft center of the valve body, the upper part of the valve body is provided with a membrane cover, the inner bottom of the membrane cover is provided with a membrane, the inner top of the membrane cover is provided with a lifting plate, the top of the membrane cover is provided with an adjusting bolt, the upper end of the adjusting bolt is a free end, the lower end of the adjusting bolt is connected with the lifting plate, and a spring is arranged between the lifting plate and the membrane; the lower extreme of valve rod is installed at the interior bottom of valve body, and the upper end and the diaphragm of valve rod are connected.

2. The high-precision self-operated fluorine-lined pressure reducing valve according to claim 1, wherein: the membrane head cover comprises a membrane head lower cover and a membrane head upper cover, the membrane head lower cover and the membrane head upper cover are covered together, and the end parts of the two ends of the membrane are arranged between the two sides of the membrane head lower cover and the two sides of the membrane head upper cover.

3. The high-precision self-operated fluorine-lined pressure reducing valve according to claim 1, wherein: a left flow passage is arranged at the lower part of one side of the valve body, the outer end of the left flow passage is a free end, and the inner end of the left flow passage is communicated with the valve cavity; the middle part of the other side of the valve body is provided with a right flow passage, the outer end of the right flow passage is a free end, and the inner end of the right flow passage is communicated with the valve cavity; the left flow channel and the right flow channel are inclined; the left runner and the right runner are arranged in parallel.

4. The high-precision self-operated fluorine-lined pressure reducing valve according to claim 1, wherein: the inner bottom of the valve cavity is provided with a limiting concave cavity, and the lower end of the valve rod is arranged in the limiting concave cavity.

5. The high-precision self-operated fluorine-lined pressure reducing valve according to claim 1, wherein: the top of membrane lid is equipped with the top cap, and the top of top cap is equipped with the protective cover, and adjusting bolt installs in top cap and protective cover.

6. The high accuracy self-operated fluorine-lined pressure reducing valve according to claim 5, wherein: an adjusting nut is arranged between the adjusting bolt and the top of the top cover.

7. The high-precision self-operated fluorine-lined pressure reducing valve according to claim 1, wherein: be equipped with the constant head tank on the top surface of lifter plate, adjusting bolt's lower extreme is equipped with location portion, and location portion installs in the constant head tank.

8. The high accuracy self-operated fluorine-lined pressure reducing valve according to claim 7, wherein: the cross sections of the positioning groove and the positioning part are both triangular.

9. The high-precision self-operated fluorine-lined pressure reducing valve according to claim 1, wherein: the outer peripheral surface of the lower part of the valve rod is provided with a limiting part, and the outer diameter of the limiting part is larger than the inner diameter of the end face of the lower end of the valve core.

10. The high accuracy self-operated fluorine-lined pressure reducing valve according to claim 1, wherein: a diaphragm pressure plate is arranged on the top surface of the diaphragm, a fixed plate is arranged between the lower end of the spring and the top surface of the diaphragm pressure plate, a fixed plate is arranged between the upper end of the valve rod and the bottom surface of the diaphragm, and fixed columns are arranged among the fixed plate, the diaphragm pressure plate and the fixed plate; a fixing nut is arranged between the fixing column and the fixing plate.