CN221034124U

CN221034124U - Check valve with anti-blocking function

Info

Publication number: CN221034124U
Application number: CN202322442720.0U
Authority: CN
Inventors: 吴文川; 吴文龙; 吴文忠; 洪德鸿; 洪瑞鸿; 姚方棋
Original assignee: Ouguan Valve Technology Co ltd
Current assignee: Ouguan Valve Technology Co ltd
Priority date: 2023-09-08
Filing date: 2023-09-08
Publication date: 2024-05-28
Anticipated expiration: 2033-09-08

Abstract

The utility model provides a check valve with an anti-blocking function, which comprises a valve body, a sleeve arranged on the valve body, a movable rod with one end being arranged on the sleeve in a lifting manner, a valve core arranged at the other end of the movable rod, a fixed plate fixedly arranged on the movable rod and positioned above the valve core, a compression spring arranged at the lower end of the fixed plate and the sleeve and sleeved on the movable rod, a side protection shell arranged between the fixed plate and the lower end of the sleeve, and a top protection device arranged between the upper end of the side protection shell and the outer side of the sleeve.

Description

Check valve with anti-blocking function

Technical Field

The utility model relates to the technical field of valves, in particular to a check valve with an anti-blocking function.

Background

The check valve is a valve with a circular valve clack as an opening and closing part and can stop the medium from flowing backwards by the action of the self weight and the medium pressure. Belongs to automatic valves, which are also called check valves, one-way valves, reflux valves or isolation valves. The movement modes of the valve clack are divided into a lifting type and a swing type. The lifting check valve is similar to a stop valve in structure, and only lacks a valve rod for driving the valve clack. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). When the inlet pressure is greater than the sum of the valve flap weight and its flow resistance, the valve is opened. Otherwise, the valve is closed when the medium flows backwards. The swing check valve has a valve clack which is inclined and can rotate around the shaft, and the working principle is similar to that of the lifting check valve. Check valves are commonly used as bottom valves for pumping devices to prevent backflow of water. The check valve and the stop valve are combined for use, so that the safety isolation function can be realized. The disadvantage is the high resistance and the poor tightness when closed.

A check valve with anti-blocking function of chinese patent No. CN202022438846.7, comprising: the valve body is internally provided with a flow passage, the top of the valve body is fixedly provided with a valve cover, the lower surface of the valve cover is provided with a sleeve, and the sleeve stretches into the valve body; the valve core assembly is arranged in the valve body and connected with the sleeve, and a boss is fixedly arranged at the upper end of the valve core assembly; the lifting assembly is arranged on the valve cover and used for lifting the valve core assembly upwards when the valve core assembly is blocked; the crushing assembly is arranged in the valve body and is used for crushing solid impurities in the flow passage; the driving assembly is arranged on the outer side wall of the valve body and connected with the crushing assembly, and the crushing assembly is arranged to work, so that solid impurities with larger inner volume of the valve body can be crushed, the crushed solid impurities can be discharged along with the flowing of liquid, and the flow channel is prevented from being blocked.

Although the above patent can solve the technical problem that the fixed impurity blocks up the runner, when the liquid with impurity flows, can't prevent that impurity in the liquid from contacting with compression spring, lead to the impurity in the liquid to adhere to on compression spring easily in compression spring shrink in-process to make compression spring easily cause the influence to opening and close of case.

Disclosure of utility model

The utility model aims to overcome the defects and shortcomings of the prior art and provides a check valve with an anti-blocking function.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a check valve with prevent blockking up function, include the valve body, set up in sleeve on the valve body, one end liftable set up in movable rod on the sleeve, set up in the case of movable rod other end, still including fixed set up in be located on the movable rod the fixed plate of case top, set up in the fixed plate with sleeve lower extreme and cover are located compression spring on the movable rod, set up in be used for between the fixed plate with the side protection casing that prevents impurity in the liquid and compression elasticity side face contact when the liquid that has impurity flows, set up in side protection casing upper end with be used for between the sleeve outside prevent that impurity in the liquid from getting into the top protector in the side protection casing from the upper end of side protection casing when the liquid that has impurity flows.

The further improvement is that: the top protector is including fixed set up in two connecting plates that just set up relatively on the side protection casing, set up in sliding tray on the connecting plate, one end movably set up in be located on the connecting plate the sliding tray in the sliding tray, set up in sliding tray one end with be located between the connecting plate be used for driving the sliding tray in the sliding tray a plurality of drive spring that is close to toward sleeve that end, set up in the arc surface that is used for making the other end laminating of sliding tray in sleeve lateral surface when the drive spring drive sliding tray is close to toward sleeve that end in the sliding tray other end.

The further improvement is that: and a pressurizing device for extruding the driving spring to improve the driving force of the driving spring to the sliding plate when the side protection shell rises to a preset position along with the movable rod is arranged between the two connecting plates and the valve body.

The further improvement is that: the pressurizing device comprises a connecting groove, a movable plate, a linkage rod, a first driving block and a second driving block, wherein the connecting groove is arranged on the connecting plate, is far away from the end of the sleeve, is communicated with the sliding groove, the movable plate is movably arranged on the connecting plate, is arranged in the sliding groove, is far away from the end of the sleeve, one end of the linkage rod is arranged on the movable plate, the other end of the linkage rod is arranged on the outer side of the connecting plate, the middle of the linkage rod is slidably arranged in the connecting groove, the first driving block is arranged on the other end of the linkage rod, the second driving block is fixedly arranged on the valve body, is arranged on the outer side of the sleeve, and is used for driving the first driving block to drive the movable plate at one end of the linkage rod to squeeze the driving spring when the side protection shell rises to a preset position along with the movable rod.

After the technical scheme is adopted, the utility model has the beneficial effects that: when the liquid with impurity flows, prevent impurity and compression elasticity side face contact in the liquid through the side protection casing to prevent through top protector that liquid from the upper end of side protection casing from getting into in the side protection casing, can prevent impurity in the liquid and compression spring to contact, be difficult to attached to on compression spring at compression spring shrink in-process impurity in the liquid, be difficult to make compression spring cause the influence to opening and close of case.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is an enlarged view of a portion a corresponding to fig. 1;

Fig. 3 is a partially cut-away top view of the side shield shell of the present utility model.

Reference numerals illustrate: valve body 1, sleeve 2, movable rod 3, case 4, fixed plate 5, compression spring 6, side protection casing 7, connecting plate 8, sliding groove 9, sliding plate 10, drive spring 11, circular arc surface 12, spread groove 13, movable plate 14, gangbar 15, first drive block 16, second drive block 17.

Description of the embodiments

The utility model will now be further described with reference to the drawings and specific examples.

Referring to fig. 1 to 3, the technical scheme adopted in this embodiment is as follows: the check valve with the anti-blocking function comprises a valve body 1, a sleeve 2 arranged on the valve body 1, a movable rod 3 with one end capable of being lifted and arranged on the sleeve 2, a valve core 4 arranged at the other end of the movable rod 3, a fixed plate 5 fixedly arranged on the movable rod 3 and positioned above the valve core 4, a compression spring 6 arranged on the fixed plate 5 and the sleeve 2 at the lower end and sleeved on the movable rod 3, a side protection shell 7 arranged between the fixed plate 5 and the lower end of the sleeve 2 and used for preventing impurities in liquid from contacting with a compression elastic side end face when the liquid with impurities flows, and a top protection device arranged between the upper end of the side protection shell 7 and the outer side of the sleeve 2 and used for preventing the impurities in the liquid from entering the side protection shell 7 from the upper end of the side protection shell 7 when the liquid with impurities flows. The side guard casing 7 is a square casing.

The top protector comprises two connecting plates 8 which are fixedly arranged on the side protection shell 7 and are oppositely arranged, a sliding groove 9 which is formed in the connecting plates 8, a sliding plate 10 which is movably arranged on the connecting plates 8 and is positioned in the sliding groove 9, a plurality of driving springs 11 which are arranged between one end of the sliding plate 10 and the connecting plates 8 and are used for driving the sliding plate 10 to approach the sleeve 2 end in the sliding groove 9, and an arc surface 12 which is arranged at the other end of the sliding plate 10 and is used for enabling the other end of the sliding plate 10 to be attached to the outer side surface of the sleeve 2 when the driving springs 11 drive the sliding plate 10 to approach the sleeve 2 end.

A pressurizing device for pressing the driving spring 11 to increase the driving force of the driving spring 11 to the sliding plate 10 when the side protection housing 7 rises to a preset position along with the movable rod 3 is arranged between the two connecting plates 8 and the valve body 1.

The pressurizing device comprises a connecting groove 13 which is arranged on the connecting plate 8 and is far away from the end of the sleeve 2 and is communicated with the sliding groove 9, a movable plate 14 which is movably arranged on the connecting plate 8 and is positioned in the sliding groove 9 and is far away from the end of the sleeve 2, a linkage rod 15 which is arranged on the movable plate 14 and is positioned on the other end of the connecting plate 8 and is slidably arranged in the middle part of the linkage rod 13, a first driving block 16 which is arranged on the other end of the linkage rod 15, and a second driving block 17 which is fixedly arranged on the valve body 1 and is positioned on the outer side of the sleeve 2, wherein the second driving block 17 is used for driving the movable plate 14 which is positioned on one end of the linkage rod 15 to squeeze the driving spring 11 when the side protection shell 7 rises to a preset position along with the movable rod 3. A gap is left between the first driving block 16 and the connecting plate 8 for the first driving block 16 to move towards the connecting plate 8. The upper end surface of the first driving block 16 located on the right side of the sleeve 2 is in a descending shape from left to right, the lower end surface of the second driving block 17 is in an ascending shape from left to right, and the inclined surfaces of the first driving block 16 and the second driving block 17 on the left side of the sleeve 2 are opposite (see fig. 3 in detail). The drive spring 11 is disposed between the moving plate 14 and the slide plate 10. The predetermined position referred to herein is a position where the side shield case 7 is raised to a contact position between the inclined surface of the first drive block 16 and the inclined surface of the second drive block 17, and the first drive block 16 is moved toward the connection plate 8 by the drive of the compression spring 6 at the contact time.

The working principle of the utility model is as follows: when the liquid with impurities flows, the impurities in the liquid are prevented from contacting with the compression elastic side end surface by the side protection shell 7, when the movable rod 3 is pushed by the liquid at the lower end of the valve core 4 to lift upwards or the compression spring 6 drives the fixed plate 5 to drive the movable rod 3 to descend, the sliding plate 10 is pushed by the driving spring 11 to approach the end of the sleeve 2 in the sliding groove 9, the other end of the sliding plate 10 is attached to the outer side surface of the sleeve 2 through the arc surface 12, the outer side surface of the sleeve 2 is kept against by the two sliding plates 10, so that the impurities in the liquid are prevented from entering into the side protection shell 7 through a gap between the sleeve 2 and the sliding plate 10, when the liquid pushes the valve core 4 to drive the movable rod 3 to rise to a preset position, the first driving block 16 contacts with the second driving block 17, and moves towards the end of the connecting plate 8 along with the pushing of the liquid, the first driving block 16 drives the moving plate 14 to squeeze the driving spring 11 through the linkage rod 15, so that the driving force of the driving spring 11 to the sliding plate 10 is improved, the tightness between the other end of the sliding plate 10 and the outer side of the sleeve 2 is improved, when liquid loses pushing to the valve core 4, the compression spring 6 drives the fixed plate 5 to drive the movable rod 3 to descend, the first driving block 16 and the second driving block 17 are separated from each other, the driving force of the driving spring 11 to the sliding plate 10 is not improved any more, and therefore the liquid is prevented from entering the side protection shell 7 from the upper end of the side protection shell 7, impurities in the liquid can be prevented from contacting with the compression spring 6, the impurities in the liquid are not easy to adhere to the compression spring 6 in the shrinkage process of the compression spring 6, and the compression spring 6 is not easy to influence the opening and closing of the valve core 4.

The utility model is to protect the structure of the product, the types of the elements are not the content protected by the utility model, and the utility model is also known technology, and only the elements which can realize the functions of the utility model can be used as a check valve with anti-blocking function in the market. Therefore, parameters such as the type of the element will not be described in detail in the present utility model. The utility model is contributed to scientifically combining the elements together.

While the basic principles and main features of the present utility model and advantages thereof have been shown and described, it will be understood by those skilled in the art that the present utility model is not limited by the foregoing embodiments, which are described merely by way of illustration of the principles of the present utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model as defined in the appended claims and their equivalents. The present utility model is not described in detail in the present application, and is well known to those skilled in the art.

Claims

1. The utility model provides a check valve with prevent blockking up function, include the valve body, set up in sleeve, one end liftable on the valve body set up in movable rod on the sleeve, set up in the case of movable rod other end, its characterized in that: the device comprises a valve core, a movable rod, a fixed plate, a compression spring, a side protection shell, a top protection device and a sealing device, wherein the fixed plate is fixedly arranged on the movable rod and is positioned above the valve core, the compression spring is arranged on the fixed plate and the lower end of the sleeve in a sleeved mode, the side protection shell is arranged between the fixed plate and the lower end of the sleeve and is used for preventing impurities in liquid from contacting with the compression elastic side end face when the liquid with the impurities flows, and the top protection device is arranged between the upper end of the side protection shell and the outer side of the sleeve and is used for preventing the impurities in the liquid from entering the side protection shell from the upper end of the side protection shell when the liquid with the impurities flows.

2. A check valve with anti-blocking function according to claim 1, characterized in that: the top protector is including fixed set up in two connecting plates that just set up relatively on the side protection casing, set up in sliding tray on the connecting plate, one end movably set up in be located on the connecting plate the sliding tray in the sliding tray, set up in sliding tray one end with be located between the connecting plate be used for driving the sliding tray in the sliding tray a plurality of drive spring that is close to toward sleeve that end, set up in the arc surface that is used for making the other end laminating of sliding tray in sleeve lateral surface when the drive spring drive sliding tray is close to toward sleeve that end in the sliding tray other end.

3. A check valve with anti-blocking function according to claim 2, characterized in that: and a pressurizing device for extruding the driving spring to improve the driving force of the driving spring to the sliding plate when the side protection shell rises to a preset position along with the movable rod is arranged between the two connecting plates and the valve body.

4. A check valve with anti-blocking function according to claim 3, characterized in that: the pressurizing device comprises a connecting groove, a movable plate, a linkage rod, a first driving block and a second driving block, wherein the connecting groove is arranged on the connecting plate, is far away from the end of the sleeve, is communicated with the sliding groove, the movable plate is movably arranged on the connecting plate, is arranged in the sliding groove, is far away from the end of the sleeve, one end of the linkage rod is arranged on the movable plate, the other end of the linkage rod is arranged on the outer side of the connecting plate, the middle of the linkage rod is slidably arranged in the connecting groove, the first driving block is arranged on the other end of the linkage rod, the second driving block is fixedly arranged on the valve body, is arranged on the outer side of the sleeve, and is used for driving the first driving block to drive the movable plate at one end of the linkage rod to squeeze the driving spring when the side protection shell rises to a preset position along with the movable rod.