CN214699375U - PV valve disk pressure spring subassembly - Google Patents

Abstract

The utility model discloses a PV valve disc pressure spring assembly, including pressure valve disc and pressure valve disc spacing, pressure valve disc spacing is installed outside pressure valve disc's left end, pressure valve disc left side upper end is provided with the pressure valve disc guide holder, through all increasing a novel valve disc pressure spring assembly on PV valve's pressure valve disc and negative pressure valve disc, and can accomplish PV valve's pressure release fast and accurately through increasing this spring assembly on pressure valve disc and negative pressure valve disc, and the pressure spring of the pressure spring assembly on pressure valve disc and the negative pressure valve disc is the helical spring, under natural circumstances this pressure spring through self elasticity crimping on the tilting pan and make the tilting pan seal with the valve body, when the tilting pan receives ascending thrust, the helical pressure spring atress extends, the valve disc upwards removes at this moment, appear the clearance between valve disc and the valve body, thereby completing the function of pressure relief.

Description

PV valve disk pressure spring subassembly

Technical Field

The utility model belongs to the technical field of the valve is relevant, concretely relates to PV valve disk pressure spring subassembly.

Background

The pressure relief valve can be automatically opened and closed according to the working pressure of the system, the pressure relief valve is generally arranged on equipment or a pipeline of a closed system to protect the safety of the system, when the pressure in the equipment or the pipeline exceeds the set pressure of the pressure relief valve, the pressure relief valve is automatically opened to relieve pressure, the pressure of a medium in the equipment or the pipeline is ensured to be below the set pressure, the equipment and the pipeline are protected, accidents are prevented, in the operation process of a fire-fighting water supply system, one path of control water enters a pilot valve control chamber from left to right in the water flow direction of a main pipeline, when the pressure of the water is smaller than the set pressure relief value, the thrust of a pilot valve spring is larger than the pressure of the water, a valve clack of the pilot valve is in a closed state, the other path of control water enters an upper cavity of a main valve through a throttling needle valve to generate static pressure, the pressure of the upper cavity is equal to the pressure in a generation flow channel, and the upper plane of the valve clack of the main valve is larger than the lower plane, so that the pressure of the upper cavity to the valve clack of the main valve is larger than the thrust of the water in the main flow channel, if the pressure of water flow in main pipeline is raised and exceeds the set pressure relief value, the pressure of water flow entering the control chamber of guide tube via control tube is increased, the pressure of water is greater than the thrust of spring, then the guide valve is opened, and the pressure relief is started.

The existing PV valve technology suffers from the following problems: when current PV valve especially docks with ship ballast bin and plays pressure release and pressure boost function, pressure release tilting tray and pressure boost tilting tray mainly are independent when carrying out the pressure release respectively with the pressure boost open and reset through an elastic clasp, and this mode makes the mode that the tilting tray opened and reset cause the tilting tray easily to open and reset not thoroughly enough to can cause the excessive pressure release of PV valve and excessive pressure boost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a PV valve disk pressure spring subassembly to the pressure release tilting disk and the pressure boost tilting disk that provide in solving above-mentioned background art mainly are that solitary when carrying out pressure release and pressure boost respectively open and reset through an elastic snap ring, and this mode makes the tilting disk open easily and cause the tilting disk to open and reset not thoroughly enough, thereby can cause the problem of the excessive pressure release of PV valve and excessive pressure boost.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a PV valve disk pressure spring subassembly, it is spacing including pressure valve disk and pressure valve disk, the pressure valve disk is spacing to be installed outside the left end of pressure valve disk, pressure valve disk left side upper end is provided with the pressure valve disk guide holder, the inside pressure spring that is provided with in space that forms between pressure valve disk guide holder and the pressure valve disk are spacing, the outside of pressure valve disk is provided with the casing, the downside of pressure valve disk is provided with negative pressure valve disk, it is spacing that negative pressure valve disk right side is provided with the negative pressure valve disk guide holder, negative pressure valve disk guide holder and the inside negative pressure valve disk spring that is provided with in space that forms between the negative pressure valve disk guide holder and the negative pressure valve disk spacing and the negative pressure valve disk.

Preferably, the pressure spring and the negative pressure valve disc spring are both spiral springs, the pressure spring is attached to the inner walls of the pressure valve disc guide seat and the pressure valve disc limiting seat through the self elastic action, and the negative pressure valve disc spring is attached to the inner walls of the negative pressure valve disc limiting seat and the negative pressure valve disc guide seat through the self elastic action.

Preferably, the lower end of the shell is further provided with a base, the shell is in butt joint with a ballast bin of the ship through the base at the bottom, and the opening inside of the shell is communicated with an inner cavity of the ballast bin of the ship.

Preferably, the pressure valve disc guide seat and the pressure valve disc as well as the negative pressure valve disc guide seat and the negative pressure valve disc are fixedly connected through screws.

Preferably, the cross-sectional area of the pressure valve disc is smaller than that of the negative pressure valve disc, pressure sealing elements are arranged at the lower ends of the left side and the right side of the pressure valve disc, and negative pressure sealing elements are arranged at the top end of the negative pressure valve disc.

Compared with the prior art, the utility model provides a PV valve disk pressure spring subassembly possesses following beneficial effect:

the utility model discloses an all increase on the pressure valve disc and the negative pressure valve disc of PV valve has a neotype valve disc pressure spring subassembly, and through increase the pressure release of the completion PV valve that this spring assembly can be quick and accurate on pressure valve disc and negative pressure valve disc, and the pressure spring of the pressure spring subassembly on pressure valve disc and the negative pressure valve disc is helical spring, this pressure spring is sealed on the tilting disk and make tilting disk and valve body through self elasticity crimping under natural circumstances, when the tilting disk receives ascending thrust, helical shape pressure spring atress and extension, this moment valve disc rebound, appear the clearance between valve disc and the valve body, thereby accomplish the function of pressure release.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description, do not constitute a limitation of the invention, in which:

FIG. 1 is a schematic diagram of a PV valve disc compression spring assembly of the present invention in a single split configuration;

FIG. 2 is a schematic structural view of a mounting position of a pressure spring assembly of a valve disc of a PV valve in a valve body according to the present invention;

in the figure: 1. a pressure valve disc; 2. a pressure spring; 3. limiting a pressure valve disc; 4. a pressure valve disc guide seat; 5. a housing; 6. a negative pressure valve disc; 7. a negative pressure valve disc spring; 8. a negative pressure valve disc guide seat; 9. and limiting the negative pressure valve disc.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a pressure spring assembly of a valve disc of a PV valve comprises a pressure valve disc 1 and a pressure valve disc limit 3, wherein the pressure valve disc limit 3 is installed outside the left end of the pressure valve disc 1, a pressure valve disc guide seat 4 is arranged at the upper end of the left side of the pressure valve disc 1, a pressure spring 2 is arranged inside a space formed between the pressure valve disc guide seat 4 and the pressure valve disc 1 as well as the pressure valve disc limit 3, a shell 5 is arranged outside the pressure valve disc 1, a base is further arranged at the lower end of the shell 5, the shell 5 is butted with a ballast bin of a ship through the base at the bottom, the inside of an opening of the shell 5 is communicated with an inner cavity of the ballast bin of the ship, the butting in the mode not only can enable the butting to be tighter, but also can simplify the butting process, so that the whole PV valve can be conveniently installed and put into use, a negative pressure valve disc 6 is arranged on the lower side of the pressure valve disc 1, a negative pressure valve disc limit 9 is arranged on the right side of the negative pressure valve disc 6, the pressure valve disc guide seat 4, the pressure valve disc 1, the negative pressure valve disc guide seat 8 and the negative pressure valve disc 6 are fixedly connected through screws, and therefore the maintenance cost of the whole PV valve can be reduced, when any one of the pressure valve disc guide seat 4, the pressure valve disc 1, the negative pressure valve disc guide seat 8 and the negative pressure valve disc 6 is damaged, the damaged part can be independently maintained or replaced at the moment, the negative pressure valve disc guide seat 8 is arranged at the lower end of the right side of the negative pressure valve disc 6, the negative pressure spring 7 is arranged in a space formed between the negative pressure valve disc guide seat 8 and the negative pressure valve disc spacing 9 as well as the negative pressure valve disc 6, the cross-sectional area of the pressure valve disc 1 is smaller than that of the negative pressure valve disc 6, pressure sealing elements are arranged at the lower ends of the left side and the right side of the pressure valve disc 1, the negative pressure sealing elements are arranged at the top end of the negative pressure valve disc 6, and the pressure spring 2 and the negative pressure valve disc spring 7 are both spiral springs, pressure spring 2 is laminated on the inner wall of pressure valve disc guide seat 4 and the spacing 3 of pressure valve disc through self elastic action, negative pressure valve disc spring 7 is laminated on the inner wall of the spacing 9 of negative pressure valve disc and negative pressure valve disc guide seat 8 through self elastic action, the cover is pressed on the seal ring under pressure spring 6's effect under the natural circumstances pressure valve disc 7, when the internal pressure of ballast storehouse is too big, the pressure increase of effect on pressure valve disc 7, pressure valve disc 7 rebound like this, the internal gas of ballast storehouse is discharged and is accomplished the pressure release.

The utility model discloses a theory of operation and use flow: the utility model discloses install the back, when using this PV valve, at first need lift by crane whole PV valve through eyebolt and carry the ballast storehouse department of boats and ships, then need dock whole PV valve through the base of bottom and the ballast storehouse of boats and ships for the inner chamber intercommunication in PV valve and the ballast storehouse of boats and ships, then can normally use this PV valve to carry out the pressure release operation, this PV valve is as follows at the main function of during operation: firstly, when the air pressure in the ballast bin is too high, the pressure is released outwards, the pressure valve disc 1 is covered and pressed on the sealing ring under the action of the pressure spring 2 under the natural condition, when the air pressure in the ballast bin is too high, the pressure acting on the pressure valve disc 1 is increased, so that the pressure valve disc 1 moves upwards, the gas in the ballast bin is discharged to complete the pressure release, secondly, when the air pressure in the ballast bin is too low, the pressure is increased inwards, the process is just opposite to the outward pressure release process, the negative pressure valve disc 6 is covered and pressed on the valve disc sealing member under the action of the negative pressure spring 7 under the natural condition, when the air pressure in the ballast bin is too low, the negative pressure valve disc 6 moves downwards under the action of the external atmospheric pressure, the external gas enters the ballast bin to increase the air pressure in the ballast bin, thirdly, when the PV valve is immersed in the water, when the water pressure is too high, the water is prevented from entering the ballast bin, when the PV valve is immersed in the water, the floater is under the action of buoyancy, so that an upward pulling force is given to the negative pressure valve disc 6, make the laminating of negative pressure valve disc 6 and valve disc sealing member inseparabler, let water not get into the ballast storehouse, four, vacuum pressure discharges, this function mainly accomplishes through vacuum pressure release rod, when on the ship need measure the ballast cabin depth of water, need guarantee the under-deck non-pressure, at this moment press down vacuum pressure release rod and withstand the pull rod of below, the pull rod drives negative pressure valve disc 6 and opens, lets ballast cabin inner chamber and external intercommunication, guarantees the interior non-pressure of storehouse.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A PV valve disc pressure spring assembly comprising a pressure disc (1) and a pressure disc stop (3), characterized in that: the left end outside at pressure valve disc (1) is installed in spacing (3) of pressure valve disc, pressure valve disc (1) left side upper end is provided with pressure valve disc guide holder (4), the inside pressure spring (2) that is provided with in space that forms between pressure valve disc guide holder (4) and pressure valve disc (1) and pressure valve disc spacing (3), the outside of pressure valve disc (1) is provided with casing (5), the downside of pressure valve disc (1) is provided with negative pressure valve disc (6), negative pressure valve disc (6) right side is provided with spacing (9) of negative pressure valve disc, negative pressure valve disc (6) right side lower extreme is provided with negative pressure valve disc guide holder (8), the inside negative pressure valve disc spring (7) that is provided with in space that forms between negative pressure valve disc guide holder (8) and negative pressure valve disc spacing (9) and negative pressure valve disc (6).

2. The PV valve disc pressure spring assembly of claim 1 wherein: pressure spring (2) and negative pressure valve disc spring (7) are helical spring, pressure spring (2) are laminated on the inner wall of pressure valve disc guide holder (4) and pressure valve disc spacing (3) through self elastic action, negative pressure valve disc spring (7) are laminated on the inner wall of negative pressure valve disc spacing (9) and negative pressure valve disc guide holder (8) through self elastic action.

3. The PV valve disc pressure spring assembly of claim 1 wherein: the lower extreme of casing (5) still is provided with the base, casing (5) dock with the ballast storehouse of boats and ships through the base of bottom, the inside ballast storehouse inner chamber intercommunication with boats and ships of casing (5) opening.

4. The PV valve disc pressure spring assembly of claim 1 wherein: and the pressure valve disc guide seat (4) is fixedly connected with the pressure valve disc (1) and the negative pressure valve disc guide seat (8) is fixedly connected with the negative pressure valve disc (6) through screws.

5. The PV valve disc pressure spring assembly of claim 1 wherein: the cross sectional area of the pressure valve disc (1) is smaller than that of the negative pressure valve disc (6), pressure sealing elements are arranged at the lower ends of the left side and the right side of the pressure valve disc (1), and the negative pressure sealing elements are arranged at the top end of the negative pressure valve disc (6).

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