CN219734333U

CN219734333U - Differential pressure regulator

Info

Publication number: CN219734333U
Application number: CN202320959294.5U
Authority: CN
Inventors: 王健红
Original assignee: Zhejiang Yuquan Fluid Technology Co ltd
Current assignee: Zhejiang Yuquan Fluid Technology Co ltd
Priority date: 2023-04-24
Filing date: 2023-04-24
Publication date: 2023-09-22
Anticipated expiration: 2033-04-24

Abstract

The utility model discloses a differential pressure regulating device, comprising: the pipe joint is provided with a water inlet and a water outlet, a valve plate is formed in the pipe joint, and a valve port is formed in the valve plate; a valve member, comprising: a valve element which faces the valve port and controls the opening of the valve port by moving axially; a pressure ratio chamber, wherein a diaphragm is arranged in the pressure ratio chamber and divides the pressure ratio chamber into a first chamber and a second chamber, and the water inlet is communicated with the first chamber; a spring that directly or indirectly applies an elastic force to the diaphragm from the first chamber toward the second chamber; a pressure ratio interface for providing an external pressure fluid to the second chamber pressure.

Description

Differential pressure regulator

Technical Field

The utility model relates to the technical field of fluid control, in particular to a differential pressure regulating device.

Background

In the variable flow system, on the premise of flow pre-balance, the pressure difference between the water pressure in the water supply pipeline and the water pressure in the water return pipeline is regulated and stabilized, so that the excessively high (excessively low) flow speed and noise of the pipeline can be effectively avoided.

In the prior art, a differential pressure adjusting device for meeting the pressure requirement is provided, and the working principle of the differential pressure adjusting device is as follows: the pressure in the water supply line and the water return line is collected by the sensor, and the opening of the valve port is manually or automatically adjusted based on the collected pressure, thereby adjusting and stabilizing the pressure difference, however, such an adjusting device requires the use of the sensor, and thus, not only requires a power source but also is expensive due to the installation of the sensor.

Disclosure of Invention

In view of the above technical problems in the prior art, embodiments of the present utility model provide a differential pressure adjusting device.

In order to solve the technical problems, the technical scheme adopted by the embodiment of the utility model is as follows:

a differential pressure regulating device, comprising:

the pipe joint is provided with a water inlet and a water outlet, a valve plate is formed in the pipe joint, and a valve port is formed in the valve plate;

a valve member, comprising:

a valve element which faces the valve port and controls the opening of the valve port by moving axially;

a pressure ratio chamber, wherein a diaphragm is arranged in the pressure ratio chamber and divides the pressure ratio chamber into a first chamber and a second chamber, and the water inlet is communicated with the first chamber;

a spring that directly or indirectly applies an elastic force to the diaphragm from the first chamber toward the second chamber;

a pressure ratio interface for providing an external pressure fluid to the second chamber pressure.

Preferably, the valve member further comprises a valve sleeve and a valve stem; wherein:

the pressure ratio opposite cavity is formed in the valve sleeve, the valve rod penetrates through the valve sleeve and passes through a diaphragm in the pressure ratio opposite cavity, the middle part of the diaphragm is connected to the valve rod, and the valve core is connected to the head part of the valve rod;

the spring is disposed in the valve housing and is configured to apply an elastic force to the valve stem.

Preferably, an axially extending flow guide channel is provided from the end of the valve core, and the flow guide channel penetrates to the first chamber.

Preferably, an annular overflow cavity is formed in the valve sleeve in the area where the spring is located; the annular flow chamber communicates with the second chamber, and the pressure ratio interface is formed on the valve housing and communicates with the annular flow chamber.

Preferably, a guide part is arranged in the annular overflow cavity, and the valve rod penetrates through the guide part and is connected with the guide part; wherein:

the spring is arranged between the guide part and the cavity bottom of the annular overflow cavity.

Preferably, the pressure-ratio opposite cavity is surrounded by an upper cover body and a lower cover body, and the edge of the membrane is clamped between the upper cover body and the lower cover body.

Preferably, the end of the valve sleeve is provided with a knob; a rotating rod is arranged in the valve sleeve and is connected to the knob for rotating along with the knob; wherein:

the lower extreme of bull stick has seted up the jack, the afterbody of valve rod stretches into in the jack, the jack with the valve rod is with restriction relative rotation and the mode cooperation of relative axial displacement of permission.

Compared with the prior art, the pressure difference adjusting device disclosed by the utility model has the beneficial effects that:

the pressure difference adjusting device is provided with the pressure comparison interface and the pressure comparison cavity, so that the pressure water in the water supply pipeline is directly compared with the pressure water in the water return pipeline, the opening of the valve port is automatically controlled by utilizing the water pressure based on the comparison result, the purpose of maintaining the pressure difference to be stable is achieved, and the pressure difference adjusting device does not adopt a sensor to collect the pressure, so that power consumption is not required, and the cost is lower.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model, as claimed.

An overview of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the full scope or all of the features of the technology disclosed.

Drawings

In the drawings, which are not necessarily drawn to scale, like numerals may describe similar components in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar components. The accompanying drawings illustrate various embodiments by way of example in general and not by way of limitation, and together with the description and claims serve to explain the inventive embodiments. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive of the present apparatus or method.

Fig. 1 is a schematic perspective view of a differential pressure regulator according to an embodiment of the present utility model.

Fig. 2 is a front cross-sectional view of a differential pressure regulating device according to an embodiment of the present utility model.

Reference numerals:

10-pipe joint; 11-water inlet; 12-water outlet; 13-a valve plate; 14-valve port; 20-a valve member; 21-pressure ratio vs. chamber; 211-a first chamber; 212-a second chamber; 213-membrane; 221-lower cover; 222-an upper cover; 23-valve core; 231-diversion channel; 24-valve stem; 25-springs; 26-a guide member; 27-valve sleeve; 271-an annular flow-through chamber; 28-rotating rod; 281-jack; 29-knob.

Detailed Description

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

In order to keep the following description of the embodiments of the present utility model clear and concise, the detailed description of known functions and known components thereof have been omitted.

As shown in fig. 1 and 2, an embodiment of the present utility model discloses a differential pressure regulating device including: a pipe joint 10 and a valve member 20, the valve member 20 being radially attached to a middle portion of the pipe joint 10.

The pipe joint 10 is connected to a water return pipeline, the pipe joint 10 is provided with a water inlet 11 and a water outlet 12, a valve plate 13 is formed in the pipe joint 10, a valve port 14 is formed on the valve plate 13, the valve port 14 faces outwards in the radial direction, and water enters the pipe joint 10 from the water inlet 11 and flows to the water outlet 12 after passing through the valve port 14.

The valve member 20 includes: valve core 23, valve housing 27, valve stem 24, spring 25, diaphragm 213, guide member 26, turning rod 28, and knob 29.

The head of the valve sleeve 27 is radially attached to the pipe joint 10, and the valve core 23 is disposed in the head of the valve sleeve 27 and faces the valve port 14 in the pipe joint 10, and the valve core 23 can close, open and adjust the opening of the valve port 14 by axially moving the valve port 14.

The middle lower part of the valve sleeve 27 is provided with an upper cover 222 and a lower cover 221 which are buckled, the upper cover 222 and the lower cover 221 enclose a pressure ratio opposite cavity 21, a diaphragm 213 is arranged in the pressure ratio opposite cavity 21, and the edge of the diaphragm 213 is clamped between the upper cover 222 and the lower cover 221, so that the diaphragm 213 divides the pressure ratio opposite cavity 21 into a first cavity 211 positioned below and a second cavity 212 positioned above.

The valve rod 24 is penetrated through the valve sleeve 27, the head of the valve rod 24 is connected to the tail of the valve core 23, the knob 29 is arranged at the tail of the valve sleeve 27 and forms threaded fit with the valve sleeve 27, the valve sleeve 27 is internally provided with the rotating rod 28, the upper end of the rotating rod 28 is connected to the knob 29, the lower end of the rotating rod 28 is provided with the jack 281, the tail of the valve rod 24 is inserted into the jack 281, the jack 281 is configured into a non-circular hole, the tail of the valve rod 24 is matched with the jack 281, the valve rod 24 can rotate along with the rotating rod 28, and the axial movement is not limited. Thus, by screwing knob 29, the initial axial positions of stem 24 and spool 23 can be adjusted, and the maximum allowable opening of valve port 14 can be adjusted.

The valve rod 24 is inserted through the valve sleeve 27 and also through the middle of the diaphragm 213, and the middle of the diaphragm 213 is connected to the valve rod 24, so that the valve rod 24 and the diaphragm 213 can be synchronously operated.

A pressure contrast port is provided on the outer periphery of the middle part of the valve housing 27, an annular flow-through cavity 271 is formed in the valve housing 27 corresponding to the pressure contrast port, the pressure contrast port penetrates through the annular flow-through cavity 271, and the annular flow-through cavity 271 is communicated with the second chamber 212. The pressure ratio interface is adapted to communicate with the water supply line such that pressurized water in the water supply line enters the second chamber 212 through the pressure ratio interface, the annular flow chamber 271, for comparison with pressurized water in the return line.

The annular flow-through chamber 271 is provided with a guide member 26, and the guide member 26 is movable in the axial direction of the annular flow-through chamber 271, and the valve stem 24 is inserted through the guide member 26 and connected to the guide member 26, so that the valve stem 24 and the guide member 26 can operate synchronously. The spring 25 is disposed in the annular flow guiding chamber, the upper end of the spring 25 abuts against the guiding member 26, and the lower end of the spring 25 abuts against the bottom of the annular flow guiding chamber, so that the spring 25 is used for providing upward elastic force to the guiding member 26 and the valve rod 24.

A diversion channel 231 is axially and upwardly provided from the head of the valve core 23, and the diversion channel 231 penetrates to the first chamber 211 of the pressure ratio opposite cavity 21, so that the pressurized water in the water return pipeline enters into the first chamber 211 through the diversion channel 231, and is pressure ratio opposite to the pressurized water from the water supply pipeline in the second pressure cavity.

The operation of the differential pressure regulator will now be described.

The pressure water from the water supply line enters the second chamber 212 and the pressure water from the water return line enters the first chamber 211, the pressure difference between them being approximately equal to the elastic force of the spring 25 and the resistance force of the diaphragm 213 (the resistance force is negligible if the diaphragm 213 is a flexible diaphragm 213), and the pressure difference being relatively constant since the elastic force of the spring 25 is determined. For example, when the water pressure in the water supply line increases, the valve stem 24 and the valve element 23 are driven to move downward by the diaphragm 213, the opening degree of the valve port 14 decreases, the throttle pressure increases, and the pressure in the recovery line also increases, so that a constant pressure difference is obtained.

The differential pressure regulating device provided by the utility model has the advantages that:

the pressure difference adjusting device is provided with the pressure comparison interface and the pressure comparison cavity, so that the pressure water in the water supply pipeline is directly compared with the pressure water in the water return pipeline, the opening of the valve port 14 is automatically controlled by utilizing the water pressure based on the comparison result, the purpose of maintaining the pressure difference to be stable is realized, and the pressure difference adjusting device does not adopt a sensor to collect the pressure, so that power consumption is not required, and the cost is lower.

The above embodiments are only exemplary embodiments of the present utility model and are not intended to limit the present utility model, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this utility model will occur to those skilled in the art, and are intended to be within the spirit and scope of the utility model.

Claims

1. A differential pressure regulating device, comprising:

a valve member, comprising:

2. The differential pressure regulating device of claim 1, wherein the valve member further comprises a valve sleeve and a valve stem; wherein:

3. The differential pressure regulator of claim 2, wherein an axially extending flow passage is defined from an end of the spool, the flow passage extending through to the first chamber.

4. The differential pressure regulating device of claim 2, wherein an annular flow chamber is formed within the valve housing in the region of the spring; the annular flow chamber communicates with the second chamber, and the pressure ratio interface is formed on the valve housing and communicates with the annular flow chamber.

5. The differential pressure regulating device as defined in claim 4, wherein a guide member is provided in the annular flow passage chamber, and the valve stem is penetrated through the guide member and connected with the guide member; wherein:

6. The differential pressure regulating device of claim 2, wherein the pressure ratio versus chamber is defined by an upper cover and a lower cover, and wherein the edge of the diaphragm is clamped between the upper cover and the lower cover.

7. The differential pressure regulating device of claim 2, wherein the end of the valve sleeve is provided with a knob; a rotating rod is arranged in the valve sleeve and is connected to the knob for rotating along with the knob; wherein: