CN211820876U - Flange type two-valve group - Google Patents

Abstract

The utility model relates to a flanged two-valve group, comprising a valve body, a flange surface inlet and a first outlet are arranged on the valve body, an isolation valve is arranged in a first valve cavity provided in the valve body, and the isolation valve comprises a second valve body. A bonnet, a first valve stem and a first gland, the bottom of the first bonnet is provided with at least two bolts whose ends are embedded in the first bonnet and pass through the first gland, and the valve body is provided with bolts connected to the first valve The second valve cavity and the second outlet communicate with the cavity and the first outlet, the second valve cavity is provided with a discharge valve, and the discharge valve includes a second valve stem, a second valve cap and a second gland located outside the second valve stem , In one valve body, the isolation valve and the discharge valve form a two-valve structure, which is installed and used with various pressure gauges or pressure transmitters, and can withstand the high temperature and high pressure of the fluid medium in the valve body, so as to save the pipeline structure and compact overall structure , online inspection, verification, calibration or sewage flushing, easy to operate and use, suitable for water, gas, oil, water vapor and other media.

Description

A flanged two-valve manifold

technical field

The utility model relates to a flange type two-valve group, which belongs to the technical field of valves.

Background technique

The differential pressure transmitter is used to prevent the medium in the pipeline from directly entering the transmitter. The pressure-sensitive diaphragm and the transmitter are connected by a capillary tube filled with fluid, so as to measure the liquid level, flow and flow rate of liquid, gas or steam. The positive and negative pressure chambers of the differential pressure transmitter and the pressure point are connected or disconnected through the isolation globe valve, but the isolation valve structure in the prior art is difficult to withstand high temperature and high pressure, and at the same time lacks the online inspection and calibration functions of the instrument, Additional connection pipelines and valve structures are required, which has the disadvantages of cumbersome installation, high cost, large space occupied by the overall structure after installation, and inconvenient operation.

Utility model content

The purpose of this utility model is to aim at the defects of the prior art, to provide a flanged two-valve group, which consists of an isolation valve and a discharge valve in one valve body to form a two-valve group structure, which is matched with various pressure gauges or pressure transmitters. Installation and use, can withstand high temperature and high pressure of the fluid medium in the valve body, so as to save the pipeline structure, compact overall structure, online inspection, verification, calibration or sewage flushing, simple and convenient operation, suitable for water, gas, oil, water vapor other medium.

The utility model is achieved through the following technical solutions:

A flanged two-valve group, comprising a valve body, the valve body is provided with a flange surface inlet and a first outlet, and the valve body is provided with a first valve cavity communicating with the flange surface inlet and the first outlet , an isolation valve is arranged in the first valve cavity, wherein the isolation valve includes a first valve cap, a first valve stem and a first gland, the bottom of the first valve cap is embedded in the first valve cavity, and Fixed with the valve body, the bottom of the first bonnet is provided with at least two bolts whose ends are embedded in the first bonnet and pass through the first gland and are provided with hexagonal nuts, the bottom of the first valve stem is placed on the first valve At the bottom of the cavity, the end of the first valve stem passes through the first valve cap and the first gland and is provided with a first handle, a plurality of first packings are arranged between the outside of the first valve stem and the first valve cap, and the outer wall Match with the first gland thread;

The valve body is provided with a second valve cavity and a second outlet communicating with the first valve cavity and the first outlet, the second valve cavity is provided with a discharge valve, the discharge valve includes a second valve stem, the The first valve rod and the second valve rod both comprise a coaxially connected lower valve rod and an upper valve rod with an outer diameter larger than the outer diameter of the lower valve rod;

The discharge valve further includes a second valve cap and a second gland located outside the second valve stem, the bottom of the second valve cap is embedded in the second valve cavity and fixed with the valve body, and the inside of the second valve cap is connected to the valve body. A plurality of second packings are arranged between the second valve stems, and a packing pressure ring is arranged between the plurality of second packings and the second gland, the outer wall of the second gland is threadedly connected with the first bonnet, and the second gland is The inner wall is threadedly connected with the second valve rod, and the end of the second valve rod protrudes from the second gland and is provided with a second handle.

The beneficial effects of the present utility model are:

(1) The second valve group is installed and used together with various pressure gauges or pressure transmitters, which can be used as the opening and closing control of the pipeline medium. The first bonnet and the first gland of the isolation valve are fixed by bolts. The first valve stem and the second valve stem include a lower valve stem and an upper valve stem with a thicker diameter, which can withstand the high temperature and high pressure of the fluid medium in the valve body, and the torque is large to facilitate opening and closing, and the first packing can be replaced online when there is no fluid and no pressure. or second filler;

(2) The inlet and first outlet of the flange face are connected to the measuring chamber or pipeline of the pressure gauge or pressure transmitter, and the pressure point. The isolation valve is used for total conduction or disconnection. By opening and closing the discharge valve, the The second valve cavity is connected to the flow channel between the first valve cavity and the first outlet, online inspection, calibration, calibration or sewage flushing, easy to operate and easy to use, two valve groups are composed of an isolation valve and a discharge valve in one valve body Structure, in order to save pipeline structure, compact overall structure, suitable for water, gas, oil, water vapor and other media.

Description of drawings

Figure 1 is a structural diagram of the utility model.

FIG. 2 is a structural diagram of the H-direction isolation valve of FIG. 1 .

FIG. 3 is a cross-sectional view taken along the line AA of FIG. 2 .

FIG. 4 is a structural diagram of the medium circulation in the valve body of the present invention.

Marked in the figure: valve body 1, flange face inlet 4 and first outlet 5, first valve chamber 6, isolation valve 2, first bonnet 21, first valve stem 22 and first gland 23, hexagon nut 7 , bolt 8, socket head cap screw 9, gasket 10, spring washer 11, first handle 12, first packing 13, packing gasket 14, second valve cavity 15 and second outlet 16, discharge valve 3, lower valve The rod 17 , the upper valve rod 18 , the second valve rod 31 , the second valve cap 32 and the second gland 33 , the positioning pin 19 , the second packing 20 , the packing pressure ring 24 , and the second handle 25 .

Detailed ways

The specific embodiments of the present utility model will be further described below with reference to the accompanying drawings.

A flanged two-valve group includes a valve body 1, the valve body 1 is provided with a flange surface inlet 4 and a first outlet 5, and the valve body 1 is provided with a flange surface inlet 4 and a first outlet. The first valve cavity 6 communicated with the outlet 5, the first valve cavity 6 is provided with an isolation valve 2, wherein the isolation valve 2 includes a first valve cap 21, a first valve stem 22 and a first gland 23, The bottom of the first valve cap 21 is embedded in the first valve cavity 6 and fixed with the valve body 1;

The bottom of the first bonnet 21 is provided with at least two bolts 8 whose ends are embedded in the first bonnet 21 and pass through the first gland 23 and are provided with hexagonal nuts 7. The first bonnet 21 and the valve body 1 are connected. A number of hexagon socket head screws 9 are arranged between them, a gasket 10 is provided between the first valve cap 21 and the first valve cavity 6, and a hexagonal nut 7 is provided between the socket socket head screws 9 and the first valve cap 21. A spring washer 11 is provided between the first pressing cover 23 and the first pressing cover 23;

The bottom of the first valve stem 22 is placed at the bottom of the first valve cavity 6, and the end of the first valve stem 22 passes through the first valve cap 21 and the first gland 23 and is provided with a first handle 12. The first valve A plurality of first packings 13 are arranged between the outside of the rod 22 and the first valve cap 21 , and the outer wall is threaded with the first gland 23 . There is an annular packing pad 14 with an L-shaped cross section;

The valve body 1 is provided with a second valve chamber 15 and a second outlet 16 that communicate with the first valve chamber 6 and the first outlet 5, and a discharge valve 3 is provided on the second valve chamber 15. The discharge valve 3 includes a second valve stem 31, the first valve stem 22 and the second valve stem 31 both include a coaxially connected lower valve stem 17 and an upper valve stem 18 with an outer diameter larger than the outer diameter of the lower valve stem 17;

The discharge valve 3 also includes a second valve cap 32 and a second gland 33 located outside the second valve stem 31. The bottom of the second valve cap 32 is embedded in the second valve cavity 15 and fixed with the valve body 1, so The bottom outer wall of the second valve cap 32 is threaded with the second valve cavity 15, and a positioning pin 19 is provided between the second valve cap 32 and the valve body 1;

A plurality of second packings 20 are arranged between the inside of the second valve cap 32 and the second valve stem 31, and a packing pressing ring 24 is arranged between the plurality of second packings 20 and the second gland 33. The second gland The outer wall of 33 is threadedly connected to the first valve cap 21, the inner wall of the second gland 33 is threadedly connected to the second valve stem 31, and the end of the second valve stem 31 protrudes from the second gland 33 and is provided with a second handle 25 .

The working principle of the utility model is:

After installing the sealing gasket 10 in the first valve cavity 6 , insert the bottom of the first valve cap 21 into the top of the first valve cavity 6 of the sealing gasket 10 , and screw the first valve cap 21 and the valve through several socket head cap screws 9 . body 1, the first bonnet 21 is fixedly connected to the valve body 1, the spring washer 11 prevents connection wear, and the bottom of the bolt 8 is embedded inside the first bonnet 21, making the bolt 8 easy to install and compact in structure.

The inverted L-shaped packing pad 14 is embedded in the first bonnet 21, and then several first packings 13 are loaded. The tops of the several first packings 13 are press-fitted through the positive L-shaped packing pad 14, and the second gland 33 is used to press the packing pad 14. , plays a role of sealing with the first valve stem 22, facilitates the structural manufacture of the first valve cap 21 and the first gland 23, and prevents leakage at the same time.

The lower valve stem 17 with a smaller diameter is used, which can withstand the high temperature and high pressure of the fluid medium in the valve body 1 . 18. When the upper valve rod 18 is connected with the first handle 12 or the second handle 25, the torque is large, which is convenient for driving the opening and closing actions.

The bottom of the second bonnet 32 of the discharge valve 3 is fixedly connected to the second valve cavity 15 through screw fitting, and the positioning pin 19 is inserted between the valve body 1 and the second bonnet 32 to limit the position and prevent the second bonnet 32 from deflecting. Quickly fix the connection, and install several second packings 20 and packing pressing rings 24 sleeved on the outside of the second valve stem 31 in sequence, and press the second packing 20 through the outer wall of the second gland 33 and the first valve cap 21 through the threaded connection. It plays the role of sealing the second valve stem 31 .

The two valve group is installed and used together with various pressure gauges or pressure transmitters, which can be used as the opening and closing control of the pipeline medium. Connect the flange surface inlet 4 and the first outlet 5 with the measuring chamber or pipeline of the pressure gauge or pressure transmitter, and with the pressure point. The isolation valve 2 is used for total conduction or disconnection. By opening and closing the discharge valve 3 , the second valve chamber 15 is connected to the flow channel between the first valve chamber 6 and the first outlet 5, so as to open the second outlet 16 for online inspection, calibration, calibration or sewage flushing, the operation is simple and convenient to use, When there is no fluid and no pressure in the valve body 1, the first packing 13 or the second packing 20 can be replaced online.

The working principle of the isolation valve 2 is as follows: rotating the first handle 12 clockwise drives the upper valve stem 18 and the lower valve stem 17 of the first valve stem 22 to rotate synchronously, and the upper valve stem 18 cooperates with the thread of the first gland 23 The lower edge of the first gland 23 descends until the lower valve stem 17 and the first valve cavity 6 are tightly closed, and the isolation valve 2 cuts off the passage of the flange surface inlet 4 and the first outlet 5; A valve rod 22 rises along the first gland 23, the lower valve rod 17 of the first valve rod 22 is separated from the end face of the first valve cavity 6 to open the passage, the valve tip of the lower valve rod 17 can be sealed with a spherical surface or a conical surface, A bonnet 21 and the first gland 23 are connected and fixed by bolts 8, which are resistant to medium high pressure 900RTJ and medium temperature: -90°C-200°C.

The working principle of the discharge valve 3 is: rotating the second handle 25 clockwise to drive the second valve stem 31 to descend along the second gland 33 under the thread fit, and the lower valve stem 17 of the second valve stem 31 and the second valve cavity 15 Close the passage where the discharge valve 3 is located; after the isolation valve 2 is opened, rotate the second handle 25 counterclockwise to drive the second valve stem 31 to rise along the second gland 33 under the screw fit, opening the isolation valve 2 downstream to the second valve The passage of the cavity 15 and the second outlet 16, bypassing the medium or flushing with sewage, so that in summary, the isolation valve 2 and the discharge valve 3 form a two-valve structure in one valve body 1, so as to save the pipeline structure and compact the overall structure , suitable for water, gas, oil, water vapor and other media.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "horizontal", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility. The novel and simplified description does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", etc., may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. The changes or replacements should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (6)

1. A flanged two-valve group, comprising a valve body, the valve body is provided with a flange surface inlet and a first outlet, and the valve body is provided with a first outlet that communicates with the flange surface inlet and the first outlet. A valve cavity, an isolation valve is arranged in the first valve cavity, and it is characterized in that, the isolation valve includes a first valve cap, a first valve stem and a first gland, and the bottom of the first valve cap is embedded in the first valve inside the cavity and fixed with the valve body, the bottom of the first valve cap is provided with at least two bolts whose ends are embedded in the first valve cap and pass through the first gland and are provided with hexagonal nuts, and the bottom of the first valve stem is arranged At the bottom of the first valve cavity, the end of the first valve stem passes through the first valve cap and the first gland and is provided with a first handle, and several first valve stems are arranged between the outside of the first valve stem and the first valve cap. packing, and the outer wall is threaded with the first gland, the valve body is provided with a second valve cavity and a second outlet that communicate with the first valve cavity and the first outlet, and a discharge valve is provided on the second valve cavity, The discharge valve includes a second valve stem. 2. A flanged two-valve group according to claim 1, wherein a plurality of socket head cap screws are arranged between the first bonnet and the valve body, and the first bonnet and the first valve A gasket is arranged between the cavities, and a spring washer is arranged between the hexagon socket head screw and the first valve cap and between the hexagon nut and the first gland. 3. A flanged two-valve group according to claim 1, wherein a plurality of first packings, the first valve cap and the first gland are provided with an annular shape, and the cross-section is an L-shaped structure padding pad. 4. A flanged two-valve group according to claim 1, wherein the first valve rod and the second valve rod both comprise a coaxially connected lower valve rod, and an outer diameter larger than the lower valve rod OD upper stem. 5. A flanged two-valve group according to any one of claims 1 to 4, wherein the discharge valve further comprises a second valve cap and a second gland located outside the second valve stem, The bottom of the second bonnet is embedded in the second valve cavity and fixed with the valve body. A plurality of second packings are arranged between the inside of the second bonnet and the second valve stem, and the plurality of second packings are connected with the second gland. A packing pressure ring is arranged between them, the outer wall of the second gland is threadedly connected to the first valve cap, the inner wall of the second gland is threadedly connected to the second valve stem, and the end of the second valve stem protrudes from the second gland. And has a second handle. 6. A flanged two-valve group according to claim 5, wherein the outer wall of the bottom of the second valve cap is threadedly matched with the second valve cavity, and a second valve cap is provided between the valve body and the valve body. There are positioning pins.

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