CN212155946U

CN212155946U - Pressure regulating valve

Info

Publication number: CN212155946U
Application number: CN202020681146.8U
Authority: CN
Inventors: 李乐宇; 陈小威; 李昊轩
Original assignee: Zhejiang Sanhao Intelligent Technology Co ltd
Current assignee: Zhejiang Sanhao Intelligent Technology Co ltd
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2020-12-15
Anticipated expiration: 2030-04-28

Abstract

The utility model discloses a pressure regulating valve, which comprises a driving diaphragm, a driving rod and a valve core which are arranged on a valve body, wherein the driving diaphragm divides the inner cavity of the valve body into an upper diaphragm cavity and a lower diaphragm cavity and drives the driving rod to reciprocate along the axial direction of a valve port under the action of pressure difference, a limit structure is arranged between the driving diaphragm and the driving rod, the limit structure comprises an upper pressure plate and a lower pressure plate which are sleeved on the driving rod and respectively pressed on the two sides of the driving diaphragm, the upper pressure plate and the lower pressure plate radially extend to the edge of the driving diaphragm by taking the driving rod as the center for a set distance, the structure greatly increases the contact area between the upper pressure plate, the lower pressure plate and the driving diaphragm, thereby increasing the pressed contact surface of the driving diaphragm, improving the installation stability of the driving diaphragm, leading the stress to be more uniform and reliable, and avoiding the driving diaphragm from, the normal action of the driving rod and the valve core is ensured, and the service performance of the product is improved.

Description

Pressure regulating valve

Technical Field

The utility model relates to an air-vent valve technical field, concretely relates to pressure regulating valve.

Background

The pressure regulating valve is a device that maintains a predetermined pressure of outlet gas by automatically changing the flow rate of gas passing through the regulating valve. The pressure regulating valve is a device capable of keeping the downstream pressure stable no matter how the flow rate and the upstream pressure of gas change, and can be applied to steam pipelines, natural gas pipelines and the like by being used in an industrial control system to adjust the direction, the flow rate, the speed and other parameters of a fluid medium, and is widely applied to daily life of people.

Common air-vent valve in the existing market belongs to direct-acting film spring air-vent valve, mainly include the valve body, the valve gap, adjusting spring, the diaphragm, valve clack subassembly etc. valve clack subassembly links to each other with the diaphragm, this valve clack subassembly mainly comprises the valve clack, ejector pin and sealing washer, the diaphragm is flat separates into upper diaphragm chamber and lower diaphragm chamber with the inside cavity of valve body, be equipped with the movable block on the ejector pin, be equipped with on its top with the movable block cooperation with the diaphragm seat of diaphragm fixing the diaphragm on the ejector pin, thereby utilize diaphragm direct sensing low reaches pressure to move in order to drive valve clack subassembly, for example, drive valve clack subassembly through drive diaphragm and shift up when lower diaphragm chamber pressure increases, perhaps drive valve clack subassembly through drive diaphragm and shift down when lower diaphragm chamber pressure reduces. However, the prior pressure regulating valve still has the following problems in practical application: the diaphragm seat only supports and presses the central position of acting on the diaphragm, and the pressurized area of contact is less relatively, and installation stability is poor for the diaphragm easily takes place the uneven phenomenon of atress at the pressurized in-process, leads to diaphragm overall motion slope incoordination, and local offset differs greatly, thereby influences the normal action of valve clack subassembly.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the air-vent valve among the prior art and only supporting the pressure effect through the diaphragm seat and put at the central point of diaphragm, and pressurized area of contact is less relatively, and installation stability is poor, leads to the diaphragm easily to take place the inconsistent problem of slope when the motion to provide the pressurized contact surface of increase drive diaphragm, promote the installation stability of drive diaphragm and be good, the more even reliable pressure regulating valve of atress.

In order to solve the technical problem, the utility model provides a pressure regulating valve, include:

the valve body comprises an installation inner cavity and a vent pipeline, and a valve opening is formed in the vent pipeline;

the driving mechanism comprises a driving diaphragm which is arranged in the installation inner cavity and divides the installation inner cavity into an upper diaphragm cavity and a lower diaphragm cavity, and a driving rod which is connected with the driving diaphragm, wherein a valve core which can shield the valve port is arranged on the driving rod, the vent pipeline is communicated with the lower diaphragm cavity, and the driving rod is driven by the driving diaphragm to reciprocate along the axial direction of the valve port;

the driving diaphragm with be provided with limit structure between the actuating lever, limit structure includes that fixed cover establishes on the actuating lever and spacing respectively support to press in top board and the holding down plate of driving diaphragm both sides, top board and holding down plate use the actuating lever is central to the radial extension of driving diaphragm edge sets for the distance.

As a preferable scheme, the driving diaphragm is provided with a circular concave part taking the driving rod as a center, and the upper pressing plate and the lower pressing plate are respectively and adaptively pressed on two side surfaces of the circular concave part.

As a preferred scheme, the driving rod is further provided with a fixing nut connected with the upper pressure plate and a fixing block connected with the lower pressure plate, and a gasket is arranged between the fixing block and the lower pressure plate.

Preferably, the vent line communicates with the lower diaphragm chamber through a pneumatic tube, and the upper diaphragm chamber is provided with a spring structure abutting against the driving diaphragm.

Preferably, the pneumatic tube is bent and extends to the air outlet end of the ventilation pipeline.

Preferably, the air inlet end of the ventilation pipeline is provided with at least one layer of filtering structure.

As a preferred scheme, a buffering diaphragm is arranged between the spring structure and the driving diaphragm, the buffering diaphragm comprises a connecting seat which is sleeved at the top end of the driving rod and is connected with an upper pressing plate, one end of the spring structure is abutted to the diaphragm seat, and the other end of the spring structure is abutted to the inner cavity of the upper diaphragm.

Preferably, a cylindrical part suitable for accommodating the spring structure is arranged in the upper diaphragm cavity, and an adjusting cover component limited at the other end of the spring structure is arranged in the cylindrical part.

As a preferable scheme, the valve body comprises a lower shell provided with the vent pipeline and an upper shell provided with the installation inner cavity, a through hole suitable for the driving rod and the fixing block to pass through is formed between the upper shell and the lower shell, and a sealing structure is arranged between the driving rod and the through hole.

As a preferred scheme, the sealing structure comprises a flexible sealing gasket and an annular clamping groove, the flexible sealing gasket is sleeved on the driving rod and located below the lower fixing block, the annular clamping groove is formed in the side wall of the through hole, and the edge of the sealing gasket is hermetically arranged in the annular clamping groove.

Compared with the prior art, the technical scheme of the utility model have the following advantage:

1. the pressure regulating valve provided by the utility model, through the vent line with the lower diaphragm chamber intercommunication, make the driving diaphragm drive the driving rod and the valve core under the pressure difference effect of upper and lower diaphragm chambers to do reciprocating movement along the valve port axial direction, thereby automatically adjusting the gas flow to keep the gas in the vent line at the regulated pressure, and through setting the upper pressure plate and the lower pressure plate on both sides of the driving diaphragm to play the spacing pressure-resisting effect to the driving diaphragm, the upper and lower pressure plates extend radially towards the edge of the driving diaphragm by taking the driving rod as the center, thus the design greatly increases the contact area between the upper and lower pressure plates and the driving diaphragm, thereby increasing the pressed contact surface of the driving diaphragm, improving the installation stability of the driving diaphragm, leading the stress to be more uniform and reliable, avoiding the driving diaphragm from generating the deflection and inclination phenomenon in the pressed moving process, and ensuring the normal action of the driving rod and the valve core, the cooperation transmission is reliable and stable, promotes the performance of product.

2. The utility model provides a pressure regulating valve, through installing fixed block and fixation nut on the actuating lever, the fastening force that compresses tightly the drive diaphragm in opposite directions is applyed to top board and holding down plate after the fixation nut fastening, can prevent like this that the drive diaphragm from taking place not hard up and displacement between upper and lower holding down plate, and installation stability is good.

3. The utility model provides a pressure regulating valve, the vent line passes through the pneumatic tube and communicates lower membrane chamber, go up the membrane chamber and install the butt in the spring structure of drive diaphragm, this kind of structure sets up, the pressure that goes up the membrane chamber receives mainly comes from this membrane chamber atmospheric pressure and spring structure's elastic pressure, when the end pressure of giving vent to anger of vent line increases, through pneumatic tube conduction pressure to lower membrane chamber, thereby promote the drive diaphragm move to go up membrane chamber one side, drive the actuating lever to shift up simultaneously until the case closes the valve mouth, in order to prevent the gas pressure of giving vent to anger end transport too big, and when the end pressure of giving vent to anger of vent line reduces, the drive diaphragm again under the pressure effect of last membrane chamber to lower membrane chamber one side removes, drives actuating lever and case simultaneously and moves down in order to open the valve mouth again, can in time control valve mouth aperture size according to the gas pressure size so as to realize steady voltage function, the purpose of regulating the gas pressure is achieved.

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 embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are 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 sectional structure view of a pressure regulating valve provided by the present invention;

FIG. 2 is an enlarged partial schematic view of the pressure regulator valve of FIG. 1;

fig. 3 is a schematic perspective view of the pressure regulating valve of the present invention;

fig. 4 is a schematic view of the installation structure of the spring structure of the present invention;

fig. 5 is a schematic view of the installation structure of the driving diaphragm and the upper pressing plate of the present invention;

description of reference numerals: 1-valve body, 11-vent pipeline, 12-valve port, 13-upper diaphragm cavity, 14-lower diaphragm cavity, 15-filtering structure, 16-upper shell, 17-lower shell, 18-through hole, 2-driving diaphragm, 21-circular concave part, 3-driving rod, 31-valve core, 32-fixing nut, 33-fixing block, 34-gasket, 4-upper pressing plate, 5-lower pressing plate, 6-pneumatic tube, 7-spring structure, 71-adjusting cover component, 8-buffering diaphragm, 81-connecting seat and 9-sealing gasket.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

Example 1

The present embodiment is described in detail below with reference to the accompanying drawings:

the present embodiment provides a pressure regulating valve as shown in fig. 1 to 5, comprising:

the valve body 1 comprises an installation inner cavity and a vent pipeline 11, and a valve opening 12 is arranged on the vent pipeline 11;

the driving mechanism comprises a driving diaphragm 2 which is arranged in the installation inner cavity and divides the installation inner cavity into an upper diaphragm cavity 13 and a lower diaphragm cavity 14, and a driving rod 3 which is connected with the driving diaphragm 2, wherein a valve core 31 which can shield the valve opening 12 is arranged on the driving rod 3, the vent pipeline 11 is communicated with the lower diaphragm cavity 14, and the driving rod 3 is driven by the driving diaphragm 2 to reciprocate along the axial direction of the valve opening 12;

drive diaphragm 2 with be provided with limit structure between the actuating lever 3, limit structure establishes including fixed cover actuating lever 3 is last and respectively spacing support press in the top board 4 and the holding down plate 5 of drive diaphragm 2 both sides, top board 4 and holding down plate 5 use actuating lever 3 is central to drive diaphragm 2 edge radial extension sets for the distance.

The above embodiment is the core technical scheme of this embodiment, the vent pipe 11 is communicated with the lower diaphragm chamber, so that the driving diaphragm 2 drives the driving rod 3 and the valve core to reciprocate along the axial direction of the valve opening under the action of the pressure difference between the upper and lower diaphragm chambers, thereby automatically adjusting the gas flow rate to keep the gas in the vent pipe at a specified pressure, and the upper and lower pressing plates 4 and 5 are arranged on both sides of the driving diaphragm 2 to limit and press the driving diaphragm 2, and extend radially to the edge of the driving diaphragm 2 by taking the driving rod 3 as the center according to the upper and lower pressing plates, so as to design to increase the contact area between the upper and lower pressing plates and the driving diaphragm, thereby increasing the pressed contact surface of the driving diaphragm 2, improving the installation stability of the driving diaphragm, and ensuring uniform and reliable stress, so as to avoid the driving diaphragm from generating a deflection and inclination phenomenon in the pressed moving process, the normal action of the driving rod and the valve core is ensured, the matching transmission is stable and reliable, and the service performance of the product is improved.

As a preferred embodiment, the driving diaphragm 2 has a circular recess 21 centered on the driving rod, and the upper pressing plate 4 and the lower pressing plate 5 are respectively and adaptively pressed against two side surfaces of the circular recess 21, so as to increase the mounting contact surface between the upper pressing plate and the driving diaphragm, so that the driving diaphragm 2 is pressed to clamp the whole circular recess 21 by the upper pressing plate and the lower pressing plate to move together, thereby ensuring that the forced movement of the driving diaphragm is more stable and reliable.

As shown in fig. 1-2, still install on the actuating lever 3 and connect the fixation nut 32 of top board 4, and connect the fixed block 33 of holding down plate 5, fixed block 33 with be provided with gasket 34 between holding down plate 5, the fixed block is the aluminium pig structure, through fixed block 33 with set up the gasket between holding down plate 5, can prevent that fixed block and holding down plate from taking place hard extrusion friction, this kind of structural setting, give to top board and holding down plate after fixation nut 32 fastens and compress tightly in opposite directions the fastening force of drive diaphragm 2 can prevent like this that the drive diaphragm from taking place to become flexible and the displacement between upper and holding down plate, and installation stability is good.

In this embodiment, as shown in fig. 1-2 and 4, the vent pipe 11 is communicated with the lower film cavity 14 through a pneumatic pipe 6, the spring structure 7 abutting against the driving diaphragm 2 is installed in the upper film cavity 13, and the pneumatic pipe 6 is bent to extend to the air outlet end of the vent pipe 11, in summary, the pressure applied to the upper film cavity 13 mainly comes from the air pressure of the film cavity and the elastic pressure of the spring structure, and when the pressure at the air outlet end of the vent pipe 11 increases, the pressure is transmitted to the lower film cavity 14 through the pneumatic pipe 6, so as to push the driving diaphragm 2 to move to one side of the upper film cavity 13, and at the same time, drive the driving rod 3 to move upward until the valve core 31 closes the valve opening, so as to prevent the air outlet end from continuously delivering air to the outside in a high pressure state; when the pressure at the air outlet end of the vent pipeline 11 is reduced, the driving diaphragm 2 moves towards one side of the lower diaphragm cavity 14 under the pressure action of the upper diaphragm cavity 13, and simultaneously drives the driving rod 3 and the valve core to move downwards to reopen the valve opening, so that the opening of the valve opening can be timely controlled according to the gas pressure to realize the pressure stabilizing function, and the purpose of adjusting the gas pressure is achieved.

As a preferred embodiment, spring structure 7 with be provided with buffering diaphragm 8 between the drive diaphragm 2, buffering diaphragm 8 establishes including the cover the connecting seat 81 of actuating lever 3 top and connection top plate, spring structure's one end butt is in on the connecting seat 81, the other end butt is in going up the membrane cavity 13, it is right through spring structure 7 drive diaphragm 2 applys to the partial pressure that moves in lower membrane cavity 14 one side, and this kind of structure setting, when drive diaphragm 2 extrudes the removal to the membrane cavity, through buffering diaphragm 2 can play the cushioning effect to drive diaphragm pressurized motion, has also avoided simultaneously spring structure 7 direct action supports to press on drive diaphragm 2, to drive diaphragm plays the guard action, guarantees stability and the reliability that drive diaphragm used.

In order to adjust the pressure of the spring structure 7 conveniently, so as to adjust the initial pressure value of the pressure adjusting valve, as shown in fig. 4, a cylindrical portion adapted to accommodate the spring structure 7 is provided in the upper diaphragm cavity 13, an adjusting cover assembly 71 limited at the other end of the spring structure is provided in the cylindrical portion, the spring structure 7 can be tightened or loosened by screwing the adjusting cover assembly 71, so that the pressure value of the spring structure 7 acting on the driving diaphragm is changed, and the adjustment is convenient and reliable.

The air inlet end of the ventilation pipeline 11 is provided with at least one layer of filter structure 15, and the filter structure 15 is mainly made of non-woven fabrics and plays a role in filtering gas media flowing into the ventilation pipeline.

The specific structure of the valve body is described in detail below with reference to fig. 1-3:

valve body 1 is including being equipped with breather line 11's lower casing 17, and being equipped with installation inner chamber's last casing 16, it is fit for to go up to be provided with between casing 16 and the lower casing 17 through-hole 18 that actuating lever 3 and fixed block passed, actuating lever 3 with be equipped with seal structure between the through-hole 18, be used for preventing breather line 11 and last diaphragm chamber leak problem appear in through-hole 18 department position to the assurance can only be in through setting up the pneumatic tube of the end of giving vent to anger to go up diaphragm chamber conducted pressure, ensure valve body internal pressure's stability.

As a concrete structure setting, seal structure is located including the cover actuating lever 3 and being located the flexible sealing pad 9 of fixed block below is in with the setting annular groove on the 18 inner walls of through-hole, the sealed peripheral seal installation of 9 of filling up in the annular groove, through flexible sealing pad 9 can actuating lever 3 with form between the through-hole 18 and move sealing connection, can guarantee like this again actuating lever 3 is in normal action in the through-hole, do not influence the sealing performance of installation inner chamber, the cooperation transmission is reliable, and the installation leakproofness is good.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A pressure regulating valve comprising:

the valve body (1) comprises an installation inner cavity and a vent pipeline (11), and a valve opening (12) is formed in the vent pipeline (11);

the driving mechanism comprises a driving diaphragm (2) which is arranged in the installation inner cavity and divides the installation inner cavity into an upper diaphragm cavity (13) and a lower diaphragm cavity (14), and a driving rod (3) which is connected with the driving diaphragm (2), wherein a valve core (31) which can shield the valve opening (12) is arranged on the driving rod (3), the vent pipeline (11) is communicated with the lower diaphragm cavity (14), and the driving rod (3) is driven by the driving diaphragm (2) to reciprocate along the axial direction of the valve opening;

the method is characterized in that: drive diaphragm (2) with be provided with limit structure between actuating lever (3), limit structure establishes including fixed cover actuating lever (3) are gone up and spacing respectively to support and press at top board (4) and holding down plate (5) of drive diaphragm (2) both sides, top board (4) and holding down plate (5) use actuating lever (3) are central to drive diaphragm (2) edge radially extends the settlement distance.

2. A pressure-regulating valve as claimed in claim 1, characterized in that: the driving diaphragm (2) is provided with a circular concave part (21) taking the driving rod as the center, and the upper pressing plate (4) and the lower pressing plate (5) are respectively matched and pressed on two side faces of the circular concave part (21).

3. A pressure-regulating valve as claimed in claim 2, characterized in that: the driving rod (3) is further provided with a fixing nut (32) connected with the upper pressing plate (4) and a fixing block (33) connected with the lower pressing plate (5), and a gasket (34) is arranged between the fixing block (33) and the lower pressing plate (5).

4. A pressure-regulating valve according to claim 3, characterized in that: the ventilation pipeline (11) is communicated with the lower diaphragm cavity (14) through a pneumatic tube (6), and the upper diaphragm cavity (13) is provided with a spring structure (7) which is abutted to the driving diaphragm (2).

5. A pressure-regulating valve as claimed in claim 4, characterized in that: the air pressure pipe (6) is bent and extends to the air outlet end of the ventilation pipeline (11).

6. A pressure-regulating valve as claimed in claim 5, characterized in that: the air inlet end of the ventilation pipeline (11) is provided with at least one layer of filtering structure (15).

7. A pressure regulating valve according to any one of claims 4-6, characterized in that: spring structure (7) with be provided with buffering diaphragm (8) between drive diaphragm (2), buffering diaphragm (8) are established including the cover connecting seat (81) that establish actuating lever (3) top and connect the top plate, the one end butt of spring structure (7) is in on connecting seat (81), the other end butt is in go up in membrane chamber (13).

8. A pressure-regulating valve as claimed in claim 7, wherein: a cylindrical part suitable for containing the spring structure (7) is arranged in the upper film cavity (13), and an adjusting cover assembly (71) limited at the other end of the spring structure (7) is arranged in the cylindrical part.

9. A pressure-regulating valve as claimed in claim 8, wherein: valve body (1) is including being equipped with lower casing (17) of breather line (11), and be equipped with installation inner chamber's last casing (16), it is fit for to be provided with between last casing (16) and lower casing (17) through-hole (18) that actuating lever (3) and fixed block passed, actuating lever (3) with be equipped with seal structure between through-hole (18).

10. A pressure-regulating valve as claimed in claim 9, wherein: the sealing structure is located including the cover actuating lever (3) and being located flexible sealing pad (9) of fixed block below is in with the setting annular groove on through-hole (18) inner wall, the circumference seal installation of sealed pad (9) in the annular groove.