CN210770463U - Stop valve with non-return function - Google Patents

Abstract

The utility model discloses a stop valve with non return function. This kind of stop valve with non return function includes valve body, valve gap, valve rod, valve clack, the valve body includes the valve pocket and respectively with inlet tube, the valve gap interface of valve pocket intercommunication, valve gap fixed connection is on the valve gap interface, valve rod and valve gap sliding connection, the valve clack includes integrative end cap and the guide post that links to each other, vertical guiding hole has been seted up to the valve rod bottom, guide post sliding connection is in the guiding hole. The utility model discloses a stop valve is provided with the guiding hole bottom the valve rod, is provided with on the valve clack along the gliding guide post of guiding hole, when the input of inlet tube stop flowing medium, the inlet tube is plugged up to the valve clack along the guiding hole whereabouts under the effect of gravity, end cap to play the effect of check valve, the utility model discloses can realize the function of stop valve and check valve simultaneously in a valve pocket, whole valve body structure is more simple, and the volume is less, and the cost of manufacture is lower.

Description

Stop valve with non-return function

Technical Field

The utility model relates to the technical field of valves, concretely relates to stop valve with non return function.

Background

A shut-off valve is the most widely used valve. Because the friction force between the sealing surfaces is small in the opening and closing process, the sealing ring is durable, the opening height is small, the manufacturing is easy, the maintenance is convenient, and the sealing ring is not only suitable for medium and low pressure environments, but also suitable for high pressure environments. The closing principle of the stop valve is that the sealing surface of the valve clack is tightly attached to the sealing surface of the valve seat by means of the pressure of the valve rod, and the medium is prevented from flowing. Since the shut-off valve has no check function, when the shut-off valve is in an open state, the fluid in the oral cavity may possibly flow back and easily enter the pipeline upstream to cause pollution, so the shut-off valve and the check valve are usually used together to control the flow direction of the flowing medium in the pipeline. However, the two valves are complicated, the assembly times are high, and the stop valve with the non-return function is provided.

For example, patent No. CN200920351292.8 discloses an integrated check stop valve, which comprises a valve body, a valve cover, a valve rod, a valve flap and a hand wheel, the check valve is characterized in that a check valve clack is arranged in a check valve cabin of the valve body, a guide pillar on the check valve clack is arranged in a tubular guide sleeve of the check valve bonnet, the check valve bonnet is fixed at the top of the check valve cabin through a bolt, a sealing gasket is arranged at the joint of the check valve bonnet and the top of the valve body, a stop valve clack is arranged in the stop valve cabin of the valve body, the lower end of the valve rod is arranged on the stop valve clack, the valve rod is fixed on the stop valve bonnet through a nut, the top of the nut in the stop valve bonnet is arranged on the top of the valve body of the stop valve bonnet through a bolt, a sealing gasket is arranged at the joint of the stop valve bonnet and. The utility model discloses a beneficial effect does: the two common valves are combined, and only one valve is needed in the pipeline equipment for gas or liquid transportation, so that the material consumption is low, the cost is low, and the installation is convenient.

The integral type non return stop valve of above-mentioned patent combines check valve and stop valve together, sparingly assembles number of times and assembly parts, however, the check valve cabin and the stop valve cabin separately design of this patent, and the structure is complicated, and the cost of manufacture is higher to, the volume of whole valve body is great, and it is inconvenient to use.

SUMMERY OF THE UTILITY MODEL

For solving the problem that above-mentioned patent brought because of check valve cabin and stop valve cabin separately design, the utility model provides a stop valve with non return function.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a stop valve with non return function, includes valve body, valve gap, valve rod, valve clack, the valve body includes the valve pocket and respectively with inlet tube, the valve gap interface of valve pocket intercommunication, the valve gap interface sets up in the inlet tube top, valve gap fixed connection is on the valve gap interface, be provided with vertical through hole in the valve gap, the valve rod passes through hole and valve gap sliding connection, the valve clack includes integrative end cap and the guide post that links to each other, the end cap sets up in the inlet tube top, vertical guiding hole has been seted up to the valve rod bottom, guide post sliding connection is in the guiding hole.

Further, a handle is fixedly connected to the top of the valve rod.

Furthermore, pins are arranged in the handle and the valve rod and are fixedly connected through the pins.

Furthermore, the top of the valve cover is fixedly connected with a pressing cap, and a sealing ring is arranged on the lower portion of the pressing cap.

Furthermore, a limiting block is arranged in the valve cover, and a limiting shoulder abutted against the limiting block is arranged on the valve rod.

Further, a first sealing gasket is arranged at the bottom of the valve clack.

Further, a flange matched with the first sealing gasket is arranged in the inlet pipe.

Further, an outlet pipe communicated with the valve cavity is arranged on the side of the valve body.

Further, the outlet pipe outside is provided with the slip joint and connects and the slip nut, outlet pipe and slip nut threaded connection, the slip nut connects the joint in order to fix the slip joint with the slip joint.

Further, a second sealing gasket is arranged between the slipknot joint and the outlet pipe.

It is right from the foregoing the utility model discloses a description can know, compares with prior art, the utility model discloses a stop valve with non return function makes the end cap of valve clack plug up the inlet tube through moving the valve rod downwards to play the effect of stop valve, the utility model discloses a valve rod bottom is provided with the guiding hole, is provided with on the valve clack along the gliding guide post of guiding hole, when the inlet tube stopped the input of flowing medium, the valve clack fell along the guiding hole under the effect of gravity, and the inlet tube is plugged up to the end cap, prevents flowing medium backward flow to play the effect of check valve, the utility model discloses can realize the function of stop valve and check valve simultaneously in a valve pocket, whole valve body structure is more simple, and the volume is less, and the cost of manufacture is lower.

Drawings

Fig. 1 is a schematic structural diagram of a stop valve with a check function according to a first embodiment of the present invention;

fig. 2 is a schematic structural view of a stop valve with a check function according to a second embodiment of the present invention;

reference numerals: 1. a valve body; 11. a valve cavity; 12. an inlet tube; 13. a valve cover interface; 14. a flange; 15. an outlet pipe; 2. a valve cover; 21. pressing the cap; 22. a seal ring; 23. a limiting block; 3. a valve stem; 31. a guide hole; 32. a handle; 33. a pin; 34. a limiting shoulder; 4. a valve flap; 41. a plug; 42. a guide post; 43. a first gasket; 5. a slip joint; 51. a second gasket; 6. slipknot nuts.

Detailed Description

The technical solution 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.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

referring to fig. 1, a stop valve with non return function, including valve body 1, valve gap 2, valve rod 3, valve clack 4, valve body 1 includes valve chamber 11 and respectively with inlet tube 12, the valve gap interface 13 of 11 intercommunications in valve chamber, valve gap interface 13 sets up in inlet tube 12 top, 2 fixed connection of valve gap are on valve gap interface 13, be provided with vertical through hole in the valve gap 2, valve rod 3 passes through hole and 2 sliding connection of valve gap, valve clack 4 includes integrative end cap 41 and the guide post 42 that links to each other, end cap 41 sets up in inlet tube 12 top, vertical guiding hole 31 has been seted up to valve rod 3 bottom, guide post 42 sliding connection is in guiding hole 31.

The top of the valve rod 3 is fixedly connected with a handle 32, a pin 33 is arranged in the handle 32 and the valve rod 3 and is fixedly connected through the pin 33, and the handle 32 is used for controlling the valve rod 3 to lift, so that convenience is brought; the top of the valve cover 2 is fixedly connected with a pressing cap 21, the lower part of the pressing cap 21 is provided with a sealing ring 22, and the top of the valve cover 2 is sealed through the pressing cap 21 and the sealing ring 22; a limiting block 23 is arranged in the valve cover 2, a limiting shoulder 34 abutted against the limiting block 23 is arranged on the valve rod 3, and the valve rod 3 is clamped by matching the limiting block 23 and the limiting shoulder 34, so that the valve rod 3 cannot move out of the valve cover 2; a first sealing gasket 43 is arranged at the bottom of the valve flap 4, a flange 14 matched with the first sealing gasket 43 is arranged in the inlet pipe 12, and when the plug 41 plugs the inlet pipe 12, the sealing performance of the plug 41 is improved through the matched first sealing gasket 43 and the flange 14; the side part of the valve body 1 is provided with an outlet pipe 15 communicated with the valve cavity 11, and the flowing medium flows out of the outlet pipe 15; the 15 outsides of outlet pipe are provided with slipknot and connect 5 and slipknot nut 6, outlet pipe 15 and the 6 threaded connection of slipknot nut, 5 joints are connected in order to fix slipknot and connect 5 with the slipknot in slipknot nut 6, fix slipknot and connect 5 in the 15 outsides of outlet pipe through slipknot nut 6, can dismantle slipknot and connect 5, use more in a flexible way.

The utility model discloses a theory of operation: in normal use, the valve rod 3 is moved upwards through the handle 32, flowing media is input from the inlet pipe 12, the valve clack 4 is moved upwards under the pressure of the flowing media to open the inlet pipe, and the flowing media is output from the outlet pipe 15 to finish the conveying of the flowing media; when the valve needs to be used as a stop valve, the valve rod 3 is moved downwards through the handle 32, so that the valve clack 4 is driven to move downwards, the plug 41 of the valve clack 4 plugs the inlet pipe 12, and the flowing medium is stopped from being conveyed; when the inlet pipe 12 stops the input of the flowing medium, the valve flap 4 falls down along the guide hole 31 by the gravity, and the plug 41 blocks the inlet pipe 12 to prevent the flowing medium from flowing backward, thereby functioning as a check valve.

The utility model discloses a stop valve with non return function is through moving valve rod 3 downwards, makes valve clack 4's end cap 41 plug up inlet tube 12 to play the effect of stop valve, the utility model discloses a 3 bottoms of valve rod are provided with guiding hole 31, are provided with on the valve clack 4 along the gliding guide post 42 of guiding hole 31, when inlet tube 12 stopped the input of flowing medium, valve clack 4 fell along guiding hole 31 under the effect of gravity, and inlet tube 12 is plugged up to end cap 41, prevents flowing medium backward flow, in order to play the effect of check valve, the utility model discloses can realize the function of stop valve and check valve simultaneously in a valve pocket 11, whole valve body 1 structure is more simple, and the volume is less, and the cost of manufacture is lower, and it is more convenient to use.

The second embodiment is as follows:

referring to fig. 2, the present embodiment is different from the first embodiment in that: a second sealing gasket 51 is arranged between the slipknot joint 5 and the outlet pipe 15, and the sealing property between the slipknot joint 5 and the outlet pipe 15 is improved through the second sealing gasket 51.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims (8)

1. A stop valve with non return function which characterized in that: including valve body, valve gap, valve rod, valve clack, the valve body includes the valve pocket and respectively with inlet tube, the valve gap interface of valve pocket intercommunication, the valve gap interface sets up in the inlet tube top, valve gap fixed connection is on the valve gap interface, be provided with vertical through hole in the valve gap, the valve rod passes through hole and valve gap sliding connection, the valve clack includes integrative end cap and the guide post that links to each other, the end cap sets up in the inlet tube top, vertical guiding hole has been seted up to the valve rod bottom, guide post sliding connection is in the guiding hole, the valve clack bottom is provided with first sealed the pad, be provided with in the inlet tube with first sealed pad complex flange.

2. The check-enabled shut-off valve according to claim 1, wherein: the top of the valve rod is fixedly connected with a handle.

3. The check-enabled shut-off valve according to claim 2, wherein: and pins are arranged in the handle and the valve rod and are fixedly connected through the pins.

4. The check-enabled shut-off valve according to claim 1, wherein: the top of the valve cover is fixedly connected with a pressing cap, and a sealing ring is arranged on the lower portion of the pressing cap.

5. The check-enabled shut-off valve according to claim 1, wherein: a limiting block is arranged in the valve cover, and a limiting shoulder abutted against the limiting block is arranged on the valve rod.

6. The check-enabled shut-off valve according to claim 1, wherein: and an outlet pipe communicated with the valve cavity is arranged at the side part of the valve body.

7. The check-enabled shut-off valve according to claim 6, wherein: the outlet pipe outside is provided with the slipknot and connects and the slipknot nut, outlet pipe and slipknot nut threaded connection, the slipknot nut connects the joint in order to fix the slipknot with the slipknot.

8. The check-enabled shut-off valve according to claim 7, wherein: and a second sealing gasket is arranged between the slipknot joint and the outlet pipe.

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