CN105020415B - A kind of multi-functional adjustable cut-off valve - Google Patents

Abstract

The present invention discloses a kind of multi-functional adjustable cut-off valve,There is provided one kind can automatic Regulation constant pressure,Adjusting can be facilitated to end again,Also there is check function,Safety is high,It is small to open and close torsion,Detachable maintaining is easy,Multi-functional adjustable cut-off valve with long service life,Including secondary spring,Control ball valve,Copper pipe,In the middle part of the valve rod discharge orifice being connected is equipped with bottom,Secondary spring is equipped between the adjusting flap and bottom flange lower face,Inlet opening and osculum are equipped in the bonnet,,Its inlet opening is shared with osculum,Control room is equipped between the bonnet, and valve rod,It, which designs control room, can ensure that hydraulic balance is stablized,When discharge pressure is excessively high,Hydraulic pressure can be made to flow back into control room by return duct makes water outlet pressure decline rapidly when secondary spring plays buffering,Keep constant pressure effect,The valve body water outlet is equipped with check function,When the valve is closed,Facilitate connection pressure measuring unit or temperature measuring equipment,It effectively prevent aqueous reflux.

Description

A kind of multi-functional regulating cut-off valve

technical field

The invention relates to a fluid control valve, in particular to a multifunctional regulating cut-off valve.

Background technique

A multi-functional regulating cut-off valve, also called cut-off valve, is installed in the pipeline to control the circulation or cut-off of the medium in the pipeline, and has the function of automatic constant pressure. An existing stop valve such as a "stop valve" published on August 30, 2011 with a Chinese patent application number of 201120323526.5 includes a valve body 1, a valve disc 2, a valve stem 3, a valve cover 5, a pressure cap 8 and a hand valve. Wheel 9, the valve body 1 is provided with the inlet, outlet and valve port for medium circulation, the upper part of the valve body 1 is threadedly connected with the lower part of the valve cover 5, and a gasket is provided on the joint surface between the upper part of the valve body 1 and the lower part of the valve cover 5 4. Make the sealing of the two better. The valve disc 2 is installed in the lower end of the valve stem 3 and placed in the valve cavity of the valve body 1, and corresponds to the valve port. The upper end of the valve stem 3 passes through the valve cover 5 and the pressure cap 8, and is fixedly connected with the handwheel 9 through the hex nut 11 There is a sign 10 between the hand wheel 9 and the hex nut 11, the valve stem 3 is threadedly connected with the valve cover 5, so that the valve stem 3 can rotate and lift along the valve cover 5, and at the same time drive the valve disc at the lower end of the valve stem 3 2 for lifting movement, used to open and close valve body 1 valve port. A packing 6 is provided between the upper inner wall of the valve cover 5 and the valve stem 3, the upper part of the valve cover 5 is threadedly connected with the pressure cap 8, and a gasket 7 is provided between the pressure cap 8 and the packing 6, and the gasket 7 is compressed by tightening the pressure cap 8 Packing 6 to achieve the purpose of sealing.

Although a cut-off valve with the above structure can effectively control the circulation or cut-off of the medium in the pipeline, it uses packing seals. When the valve is frequently opened and closed, the pressure cap is likely to loosen and the sealing performance will fail, that is, the pipeline is running without water and under pressure. In this case, the packing cannot be replaced, and the sealing ring can only be replaced by disassembling the gland after cutting off the pressure of the pipeline. It is very inconvenient to disassemble and replace. The replacement needs to stop the pipeline, which will affect the subsequent use needs. It is inconvenient to use and will give The user brings serious losses, and the inner seal is sealed between metal and metal, which will easily cause the sealing surface to wear out, make the inner seal lose its effect, and cause the waste of water source. The pressure water temperature function cannot keep the outlet water pressure constant, and it is easy to cause damage to water appliances and waste of water sources due to excessive water outlet pressure. Moreover, when the stop valve is slightly damaged, it is very troublesome to not be able to repair it online. Generally, it can only be replaced as a whole, which wastes resources. , can not bring good economic benefits to users.

Contents of the invention

Aiming at the above existing problems, the present invention proposes a multi-function valve that can automatically adjust the constant pressure, conveniently adjust the cut-off, and has a non-return function, high safety, small opening and closing torque, easy disassembly and maintenance, and long service life. Function regulating shut-off valve.

In order to solve this technical problem, the present invention adopts the following scheme: a multifunctional regulating stop valve, including a valve body, a valve stem, a lower valve cover, a valve seat, a regulating disc and an opening handwheel, the valve body is provided with a medium circulation The water inlet, outlet and valve port of the valve, the regulating disc is installed in the lower end of the valve stem and placed in the valve cavity of the valve body, corresponding to the valve port, the valve stem and the lower valve cover are connected by threads, and the upper end of the valve stem Pass through the upper bonnet and connect with the opening handwheel. The upper bonnet and the lower bonnet are threaded and are provided with a sealing ring. A sealing gasket is also provided between the lower bonnet and the valve body. A sealing gasket is provided between the regulating disc and the valve seat, and a metal washer is provided under the sealing gasket to press the sealing gasket. It is characterized in that it includes an auxiliary spring, a control ball valve, and a copper pipe. The valve A control room, an O-ring and a fixed collar are provided between the lower end of the rod and the regulating disc, an auxiliary spring is provided between the regulating disc and the lower end surface of the lower valve cover, and a water inlet is provided in the upper valve cover. Hole and drain hole, the water inlet hole and the drain hole are shared, the lower end surface of the valve body is provided with a water inlet hole, and the water inlet hole on the lower end surface of the valve body is provided with a connector, and is connected with the water inlet hole on the side of the upper valve cover Copper pipes are used between the heads to connect with the control ball valve. The side end surface of the lower valve cover is provided with a water return hole, and the water return hole on the side end surface of the lower valve cover is provided with a connector, which is connected to the connection head of the drain hole on the side of the upper valve cover. The copper pipe is also used to connect the control ball valve, so that the return hole of the lower valve cover and the drain hole of the upper valve cover are also connected to the copper pipe. , the middle part of the valve stem is provided with a flow hole connected to the bottom, the outlet of the valve body is provided with a check valve disc, and a positioning pin is also provided under the check valve disc, and the check valve disc is connected to the valve body A sealing gasket is arranged between them, a spring is arranged between the check valve flap and the fixed lock nut, and a threaded connection is adopted between the fixed lock nut and the water outlet of the valve body.

A further improvement is: two O-rings and two grooves are provided at the lower end of the valve stem.

A further improvement is: there are three O-rings in the upper valve cover, two above the water inlet hole and the drain hole of the upper valve cover, and one below.

A further improvement is that: the end face connector on the side of the lower valve cover is a pressure gauge or a temperature sensor.

A further improvement is that: the upper end surface of the lower valve cover is further provided with two grooves, which are conveniently used for locking the lower valve cover.

By adopting the aforementioned technical solution, the beneficial effect of the present invention is: when the valve needs to be closed, the valve stem can be rotated by turning on the hand wheel, so that the valve stem can drive the regulating disc to press down until the sealing gasket contacts and seals with the valve seat. Close the valve, because the water pressure in the pipeline is relatively high, it is easy to cause the regulating disc to loosen. It is designed with a copper tube and a control ball valve. When the valve is closed, the control ball valve between the valve body and the upper valve cover is opened to make the water pressure pass through the copper tube. The flow hole of the valve stem further flows into the control room of the regulating valve clack, and the regulating valve clack is compressed by its own hydraulic pressure, so that the regulating valve clack can bear two-way pressure, which can ensure the improvement of the sealing performance. Because of the soft seal, it will not be affected. The sealing performance is affected by the water pressure. When the valve is opened, the control ball valve between the valve body and the upper valve cover can be closed, and the control ball valve between the lower valve cover and the upper valve cover can be opened at the same time to discharge the water pressure in the control room in time. That is, it is convenient to open the valve. Since the O-ring is used between the upper bonnet and the valve stem, the opening and closing torque is small. When the O-ring is damaged, the purpose of replacing the sealing ring with continuous water pressure can be realized without cutting off the pipe. The pipeline pressure can be stopped, and the upper valve cover can be directly disassembled to replace the sealing ring. It is very inconvenient to disassemble and replace, and will not affect subsequent production. It is convenient to use and more convenient to maintain.

When the valve needs to be opened to adjust the constant pressure function, the valve is opened to the set pressure value by turning on the hand wheel, and the control ball valve between the upper valve cover and the lower valve cover is opened at the same time. When the outlet water pressure rises, the water pressure can pass through The flow hole of the lower bonnet flows into the flow hole of the valve stem to the control room, and then through the action of the buffer spring, the regulating valve flap automatically moves downwards to reduce the water outlet pressure, realizes automatic maintenance of the water outlet water pressure constant, and can protect the water well. Appliances can bring good economic benefits to users.

When it is necessary to detect water pressure or water temperature, it is only necessary to close the valve and remove the connector of the lower valve cover. Since the water outlet is designed with a non-return function, when installing a pressure gauge or a temperature sensor, it can effectively prevent the water from flowing back, which is convenient. Detection, reasonable design, convenient installation, the invention is widely used in tap water and buildings and has won unanimous praise from users.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of a pressure gauge installed in an embodiment of the present invention;

Fig. 3 is a structural schematic diagram of installing a temperature sensor according to an embodiment of the present invention;

Fig. 4 is a top view of the lower cover valve of the embodiment of the present invention;

Fig. 5 is A-A sectional view of Fig. 4;

Fig. 6 is a sectional view of the valve stem of the embodiment of the present invention;

Fig. 7 is a sectional view of the upper valve cover of the embodiment of the present invention;

Fig. 8 is a sectional view of the valve body of the embodiment of the present invention;

Fig. 9 is a structural schematic diagram of a stop valve in the prior art.

Detailed ways

The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1 to Fig. 8, the embodiment of the present invention discloses a multifunctional regulating stop valve, comprising a valve body 1, a valve stem 4, a lower valve cover 6, a valve seat 15, a regulating disc 3 and an opening hand wheel 9, the The valve body 1 is provided with a water inlet 11, a water outlet 12, and a valve port 14 for medium circulation. The regulating disc 3 is installed on the lower end of the valve stem 4 and placed in the valve cavity of the valve body 1, and corresponds to the valve port 14. The valve Adopt threaded connection between rod 4 and lower bonnet 6, valve rod 4 upper end passes upper bonnet 7, and is connected with opening hand wheel 9, adopts threaded connection and sets between described upper bonnet 7 and lower bonnet 6 There is a sealing ring 62, a sealing gasket 61 is also provided between the lower valve cover 6 and the valve body 1, a sealing gasket 33 is provided between the regulating valve disc 3 and the valve seat 15, and a sealing gasket 33 is arranged below the sealing gasket 33. A metal washer 34 is provided to press the gasket 33. It is characterized in that it includes an auxiliary spring 5, a control ball valve 8, and a copper pipe 200. A control chamber 31, O-shaped sealing ring 42 and fixed collar 32, an auxiliary spring 5 is provided between the regulating disc 3 and the lower end surface of the lower valve cover 6, and the upper valve cover 7 is provided with a water inlet hole 73 and a drain hole 74, Its water inlet hole 73 is shared with drain hole 74, and described valve body 1 lower end surface is provided with water inlet hole 16, and described valve body 1 lower end surface water inlet hole 16 is provided with connector 13, and is connected with upper valve cover 7 sides. Copper pipe 200 is used between the connectors 100 of the water holes 73 to connect with the control ball valve 8 , the side end surface of the lower valve cover 6 is provided with a water return hole 63 , and the water return hole 63 on the side end surface of the lower valve cover 6 is provided with a connector 102 , and between the connection head 101 of the drain hole 74 on the side of the upper valve cover 7, the copper pipe 201 is also used to connect with the control ball valve 81, so that the return hole 63 of the lower valve cover 6 and the drain hole 74 of the upper valve cover are also connected to the same copper pipe 201 Above, O-rings 72 and 71 are provided between the upper bonnet 7 and the valve stem 4, the middle and bottom of the valve stem 4 are provided with a flow hole 41 connected to each other, and the water outlet of the valve body 1 is provided with a stopper. Return valve disc 2, positioning pin 22 is also provided under the check valve disc 2, a sealing gasket 21 is provided between the check valve disc 2 and the valve body 1, and the check valve disc 2 is connected to the fixed lock nut A spring 23 is arranged between 24, and the fixed lock nut 24 is threadedly connected to the water outlet 12 of the valve body 1.

The lower end of the valve stem 4 is provided with two O-shaped sealing rings 42 and two grooves 43, and the upper valve cover 7 is provided with three O-shaped sealing rings 72 and 71, which are located in the water inlet hole of the upper valve cover. There are 2 above the drain hole and 1 below. The connector on the side end surface of the lower bonnet is a pressure gauge 300 or a temperature sensor 400. The upper end surface of the lower bonnet is also provided with two grooves 64, which are convenient Used to lock the lower valve cover 6.

When the valve needs to be closed, the valve stem can be turned by turning on the handwheel, so that the valve stem can drive the regulating disc to press down until the sealing gasket contacts and seals with the valve seat, and then the valve can be closed. Due to the relatively large water pressure in the pipeline, it is easy to cause adjustment. The valve clack is loose. It is designed with a copper pipe and a control ball valve. When the valve is closed, the control ball valve between the valve body and the upper valve cover is opened, so that the water pressure flows into the stem water hole through the copper pipe and further flows into the control valve clack. In the room, the regulating disc is compressed by its own water pressure, so that the regulating disc can bear two-way pressure, which can ensure the improvement of sealing performance. Because of the soft seal, it will not lose the sealing performance due to the influence of water pressure. When the valve is opened, that is The control ball valve between the valve body and the upper bonnet can be closed, and the control ball valve between the lower bonnet and the upper bonnet can be opened at the same time to discharge the water pressure in the control room in time, that is, it is convenient to open the valve. The O-ring is used in the middle, and the opening and closing torque is small. When the O-ring is damaged, the purpose of replacing the sealing ring with continuous water pressure is realized. There is no need to cut off the pipeline pressure and stop the pipeline, and it can be directly disassembled. It is very inconvenient to replace the sealing ring on the valve cover, and it is very inconvenient to disassemble and replace. It will not affect the subsequent production. It is convenient to use and more convenient to maintain.

When the valve needs to be opened to adjust the constant pressure function, the valve is opened to the set pressure value by turning on the hand wheel, and the control ball valve between the upper valve cover and the lower valve cover is opened at the same time. When the outlet water pressure rises, the water pressure can pass through The flow hole of the lower bonnet flows into the flow hole of the valve stem to the control room, and then through the action of the auxiliary spring, the regulating valve clack automatically moves downward to reduce the water outlet pressure, and realizes automatically keeping the water outlet water pressure constant, which can protect the water well. Appliances can bring good economic benefits to users.

When it is necessary to detect water pressure or water temperature, it is only necessary to close the valve and remove the connector of the lower valve cover. Since the water outlet is designed with a non-return function, when installing a pressure gauge or a temperature sensor, it can effectively prevent the water from flowing back, which is convenient. Detection, reasonable design, convenient installation, the invention is widely used in tap water and buildings and has won unanimous praise from users.

The above records are only examples of using the technical content of this creation. Any modifications and changes made by those who are familiar with this technology using this creation belong to the scope of patents claimed by this creation, and are not limited to those disclosed in the examples.

Claims (1)

1. A multifunctional regulating stop valve, comprising a valve body, a valve stem, a lower valve cover, a valve seat, a regulating disc and an opening handwheel, the valve body is provided with a water inlet, a water outlet and a valve port for medium circulation, The regulating valve disc is installed in the lower end of the valve stem and placed in the valve cavity of the valve body, and corresponds to the valve port. The connection between the upper bonnet and the lower bonnet is threaded and a sealing ring is provided. A sealing gasket is also provided between the lower bonnet and the valve body. Between the regulating disc and the valve seat A sealing gasket is provided, and a metal washer is arranged under the sealing gasket, and the sealing gasket is pressed down. It is characterized in that it includes an auxiliary spring, a control ball valve, and a copper pipe. Control room, O-shaped sealing ring and fixed collar, an auxiliary spring is provided between the regulating disc and the lower end surface of the lower valve cover, and the upper valve cover is provided with a water inlet and a drain hole, and the water inlet and The drain hole is shared, the lower end surface of the valve body is provided with a water inlet hole, and the water inlet hole on the lower end surface of the valve body is provided with a connector, which is connected to the connector of the water inlet hole on the side of the upper valve cover with a copper pipe and the control ball valve , the side end surface of the lower bonnet is provided with a water return hole, and the backwater hole on the side end surface of the lower bonnet is provided with a connector, and is connected with the connection head of the drain hole on the side of the upper bonnet by using a copper pipe to connect with the control ball valve, The water return hole of the lower bonnet and the drain hole of the upper bonnet are also connected to the same copper pipe, an O-ring and a control room are arranged between the upper bonnet and the valve stem, and the middle and bottom of the valve stem are provided with connected flow holes, the outlet of the valve body is provided with a check valve disc, and a positioning pin is also provided under the check valve disc, and a sealing gasket is provided between the check valve disc and the valve body. There is a spring between the valve disc and the fixed lock nut, and the threaded connection is used between the fixed lock nut and the water outlet of the valve body; the lower end of the valve stem is provided with two O-rings and two grooves; There are 3 O-rings in the upper bonnet, 2 above the water inlet and drain holes of the upper bonnet, and 1 below; the side end connector of the lower bonnet is a pressure gauge or a temperature gauge Sensor; the upper end surface of the lower valve cover is also provided with two grooves, which are convenient for locking the lower valve cover.