CN202733099U

CN202733099U - Self-operated flow control valve capable of automatically regulating pressure difference

Info

Publication number: CN202733099U
Application number: CN 201220302403
Authority: CN
Inventors: 赵阳
Original assignee: ZHENGFENG VALVE GROUP CO Ltd
Current assignee: ZHENGFENG VALVE GROUP CO Ltd
Priority date: 2012-06-27
Filing date: 2012-06-27
Publication date: 2013-02-13
Anticipated expiration: 2022-06-27

Abstract

The utility model discloses a self-operated flow control valve capable of automatically regulating pressure difference, which comprises a valve body, a bonnet, a valve stem, a piston type valve plate and a sleeve type valve seat, a bush is arranged in the valve body, a control pressure cavity is defined by the bush and the bonnet, a diaphragm is fixed in the middle of the control pressure cavity to divide the control pressure cavity into an upper pressure cavity and a lower pressure cavity, the middle of the diaphragm is fixedly connected with the valve stem, the bonnet is provided with an air inlet which is connected with one end of an external control pipeline, moreover, the other end of the control pipeline is connected with the medium inlet of the valve body, and the air inlet is also communicated with the upper pressure cavity at the same time. On the basis of the conventional self-operated control valve using a spring to change pressure difference, the pressure change of the air is utilized to automatically regulate pressure in order to guarantee the constancy of the pressure difference of a system and automatically regulate and eliminate hydraulic disorder in a pipe network according to branches and consumers, and moreover, the valve can regulate the change of pressure outside the controlled system and the change of pressure inside the controlled system.

Description

Automatically regulate the self-operated flow control valve of pressure reduction

Technical field

The utility model relates to the mechanical engineering valve, particularly a kind of self-operated flow control valve of automatic adjusting pressure reduction.

Background technique

The differential pressure control valve door of existing market, basically all be manually to regulate, because manual tune can not reach the effect of real time operation, general is just can implement in rear a period of time of pipe network hydraulic misadjustment variation, and the at present adjusting of Self-operated differential pressure regulaitng valve partly adopts the size that changes spring pressure to change the principle that it controls pressure reduction, this mode, the control accuracy inaccuracy, regulation range is little, and poor stability can't be demarcated pressure difference.

Summary of the invention

In order to overcome defects, the utility model provides a kind of and has utilized the pressure variation of medium self to carry out self-control, thereby reaches the self-operated flow control valve that keeps the constant automatic adjusting pressure reduction of controlled system pressure reduction.

The utility model for the technological scheme that solves its technical problem and adopt is: a kind of self-operated flow control valve of automatic adjusting pressure reduction, comprise valve body, valve gap, valve rod, piston type valve plate and telescopic valve seat, valve gap is connected by bolt seal with valve body, in valve gap, be provided with a valve rod, the lower end of valve rod is fixedly connected with the piston type valve plate, cooperate in the middle of valve seat is located in the valve body and with the piston type valve plate, be provided with a lining and valve gap in the described valve body and form a pilot pressure chamber, fix a diaphragm in the middle of the pilot pressure chamber pilot pressure chamber is divided into upward pressure chamber and downforce chamber, be fixedly connected on the valve rod in the middle of the diaphragm, described valve gap is provided with a suction port and is communicated with external control pipeline one end, and the pilot line the other end is communicated with the MEDIA FLOW entrance of valve body, and suction port is communicated with the upward pressure chamber simultaneously.

As further improvement of the utility model, described valve stem tip also is provided with an adjusting screw rod.

As further improvement of the utility model, described valve rod is positioned at and is fixed with a follow block and diaphragm clamp device on the pilot pressure chamber, and described diaphragm is fixed in the diaphragm clamp device, and valve rod sheathed spring between diaphragm clamp device and follow block.

Basic functional principle of the present utility model is as follows:

When the pressure of valve body inflow entrance during greater than the valve body outflow opening, then the gas of valve body inflow entrance enters the upward pressure chamber in pilot pressure chamber by pilot line, thereby diaphragm band ovable valve stem is moved down, increase circulation area, otherwise, when the pressure of valve body inflow entrance during less than the valve body outflow opening, then the gas in the upward pressure chamber in pilot pressure chamber enters the inflow entrance of valve body by pilot line, move thereby make on the diaphragm band ovable valve stem, reduce circulation area, realize automatically regulating.

The beneficial effects of the utility model are: the utility model changes on the basis of pressure reduction at original self force type control valve with spring, increase is carried out pressure with the pressure variation of gas self and is automatically regulated, the pressure reduction of assurance system is constant, play a minute branch road, divide the user automatically to regulate, eliminate the effect of hydraulic misadjustment in the pipe network, and controlled system is outer and system's internal pressure changes, and this valve all can be regulated.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the side view of Fig. 1.

Embodiment

In order to deepen understanding of the present utility model, the utility model is described in further detail below in conjunction with embodiment and accompanying drawing, and this embodiment only is used for explaining the utility model, does not consist of the restriction to the utility model protection domain.

Fig. 1-2 has shown a kind of mode of execution of the self-operated flow control valve of a kind of automatic adjusting pressure reduction of the utility model, comprise valve body 1, valve gap 2, valve rod 3, piston type valve plate 4 and telescopic valve seat 5, valve gap 2 and valve body 1 are connected by bolt seal, in valve gap 2, be provided with a valve rod 3, the lower end of valve rod 3 is fixedly connected with piston type valve plate 4, valve seat 5 is located at valve body 1 interior centre and is cooperated with piston type valve plate 4, be provided with a lining 6 in the described valve body 1 and form a pilot pressure chamber 7 with valve gap 2, fix a diaphragm 8 in the middle of the pilot pressure chamber 7 pilot pressure chamber 7 is divided into upward pressure chamber 71 and downforce chamber 72, be fixedly connected on the valve rod 3 in the middle of the diaphragm 8, described valve gap 2 is provided with a suction port 9 and is communicated with external control pipeline 10 1 ends, and pilot line 10 the other ends are communicated with the MEDIA FLOW entrance of valve body 1, suction port 9 is communicated with upward pressure chamber 71 simultaneously, and described valve rod 3 tops also are provided with an adjusting screw rod 11; Described valve rod 3 is positioned at and is fixed with a follow block 12 and diaphragm clamp device 13 on the pilot pressure chamber 7, and described diaphragm 8 is fixed in the diaphragm clamp device, and valve rod 3 sheathed spring 14 between diaphragm clamp device 13 and follow block 12.

Lining 6 forms a pilot pressure chamber 7 with valve gap 2, diaphragm 8 is separated into up and down two-part with pilot pressure chamber 7, diaphragm 8 is connected with valve rod 3, under the cooperative action power of upper and lower cavity pressure difference and spring 9, carry out dynamic adjustments by the aperture that valve rod 3 drives 4 pairs of valves of piston type valve plate, and can by 11 pairs of valves of adjusting screw rod adjusting be set manually at any time.

Claims

1. self-operated flow control valve of automatically regulating pressure reduction, comprise valve body (1), valve gap (2), valve rod (3), piston type valve plate (4) and telescopic valve seat (5), valve gap (2) is connected by bolt seal with valve body (1), in valve gap (2), be provided with a valve rod (3), the lower end of valve rod (3) is fixedly connected with piston type valve plate (4), cooperate in the middle of valve seat (5) is located in the valve body (1) and with piston type valve plate (4), it is characterized in that: be provided with a lining (6) in the described valve body (1) and form a pilot pressure chamber (7) with valve gap (2), fix a diaphragm (8) in the middle of the pilot pressure chamber (7) pilot pressure chamber (7) are divided into upward pressure chamber (71) and downforce chamber (72), be fixedly connected on the valve rod (3) in the middle of the diaphragm (8), described valve gap (2) is provided with a suction port (9) and is communicated with external control pipeline (10) one ends, and pilot line (10) the other end is communicated with the MEDIA FLOW entrance of valve body (1), and suction port (9) is communicated with upward pressure chamber (71) simultaneously.

2. the self-operated flow control valve of automatic adjusting pressure reduction according to claim 1, it is characterized in that: described valve rod (3) top also is provided with an adjusting screw rod (11).

3. the self-operated flow control valve of automatic adjusting pressure reduction according to claim 1, it is characterized in that: described valve rod (3) is positioned at and is fixed with a follow block (12) and diaphragm clamp device (13) on the pilot pressure chamber (7), described diaphragm (8) is fixed in the diaphragm clamp device, and valve rod (3) is positioned at a sheathed spring (14) between diaphragm clamp device (13) and the follow block (12).