CN210240679U

CN210240679U - Check valve with double valves

Info

Publication number: CN210240679U
Application number: CN201921249237.8U
Authority: CN
Inventors: Caiyun Wu; 吴彩云; Xinwang Wu; 吴信旺; Tianqiang Wu; 吴天强
Original assignee: Tianjin Kaishitong Valve Manufacturing Co Ltd
Current assignee: Tianjin Kaishitong Valve Manufacturing Co Ltd
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2020-04-03
Anticipated expiration: 2029-08-05

Abstract

The utility model provides a check valve with double valve door. Check valve with bivalve includes the valve body, firstly prevents mechanism and second and prevents mechanism against the current, first prevent that mechanism against the current installs in valve body central point and put, first prevent that mechanism against the current mainly includes T shape rotary rod, jack, T shape stopper, T shape apron, external screw thread and internal thread, surface mounting has T shape apron on the valve body is close to the top, T shape apron central point puts and is equipped with the jack, T shape stopper one end runs through inside inserting the jack lower extreme, T shape rotary rod lower extreme runs through inside jack upper end, T shape stopper and jack sliding connection, the jack medial surface is equipped with the internal thread, the second prevents that mechanism against the current installs in valve body exit. The utility model provides a check valve with bivalve has the valve that need not install a control of damming in addition again, cost reduction, and the advantage of convenient operation.

Description

Check valve with double valves

Technical Field

The utility model relates to a check valve technical field especially relates to a check valve with double valve door.

Background

The check valve is a valve with a circular valve clack and acts by self weight and medium pressure to block the medium from flowing backwards. It belongs to the automatic valve category, also called check valve, reflux valve or isolation valve. The valve clack motion mode is divided into lifting type and swing type. The lift check valve is similar in structure to the stop valve and only lacks a valve rod that drives the valve flap.

The effect of over-and-under type check valve is exactly preventing flowing backwards, but lacks the valve rod that drives the valve clack, and we do not need liquid normal circulation now to the check valve does not have limit function, need install a valve of effect of damming in addition again, and the cost improves, and need assemble two valves, complex operation.

Therefore, there is a need to provide a new check valve with a double valve to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide a check valve with bivalve.

In order to solve the above technical problem, the utility model provides a check valve with double valve door includes: a valve body;

the valve body is provided with a T-shaped cover plate close to the upper surface of the top, the central position of the T-shaped cover plate is provided with an insertion hole, one end of the T-shaped plug is inserted into the lower end of the insertion hole, the lower end of the T-shaped rotary rod penetrates through the inner part of the upper end of the insertion hole, the T-shaped plug is in sliding connection with the insertion hole, the inner side surface of the insertion hole is provided with an internal thread, the outer side surface of one end of the T-shaped rotary rod is provided with an external thread, and the internal thread is matched with the external thread;

and the second backflow prevention mechanism is arranged at the outlet of the valve body.

Preferably, the second anti-reflux mechanism mainly comprises a T-shaped sliding rod, a limiting rod, a spring and a circular cover plate, wherein the inner side wall of an outlet of the valve body is provided with a conical groove, the opening position of the valve body is provided with the circular cover plate, the inner side wall of the valve body, which is close to the position of the circular cover plate, is connected with two symmetrical limiting rods, one end of the T-shaped sliding rod penetrates through the inside of the limiting rod and is connected with the side face matched with the circular cover plate, the limiting rod is further connected with the side face of the circular cover plate through the spring, and the spring is surrounded on the.

Preferably, the lower surface of the T-shaped plug is connected with a rubber base plate, and the outer side surface of the circular cover plate is connected with a sealing ring.

Preferably, the outer side wall of the T-shaped rotating rod is connected with a pull ring.

Preferably, the outer side surface of the T-shaped cover plate is provided with two symmetrically arranged screw holes, the top of the valve body is close to the center and is also provided with matched screw holes, and the screw holes are in threaded connection with matched locking screws.

Preferably, the top end face of the T-shaped plug is connected with a rubber pad.

Compared with the prior art, the utility model provides a check valve with double valve door has following beneficial effect:

the utility model provides a check valve of double valve door puts the jack through T shape apron central point and installs threaded connection additional and has T shape pole to can present T shape stopper activity process, make liquid obtain control by the flow process, need not install a valve of damming control in addition again, cost reduction, and the operation is convenient, and installs the second additional and prevent against the current mechanism, can the secondary prevent against the current, make prevent against the current effect maximize.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of a check valve with dual valves according to the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

fig. 3 is a partially enlarged schematic structural view of the second backflow prevention mechanism shown in fig. 1.

Reference numbers in the figures: 1. a valve body; 2. a first backflow prevention mechanism; 3. a second backflow prevention mechanism; 21. a T-shaped rotating rod; 22. a pull ring; 23. a jack; 24. a T-shaped plug; 25. locking the screw; 26. a T-shaped cover plate; 27. an external thread; 28. an internal thread; 31. a T-shaped slide bar; 32. a limiting rod; 33. a spring; 34. a conical groove; 35. and a circular cover plate.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

Please refer to fig. 1, fig. 2 and fig. 3, wherein fig. 1 is a schematic structural diagram of a check valve with two valves according to a preferred embodiment of the present invention; FIG. 2 is an enlarged view of a portion A of FIG. 1; fig. 3 is a partially enlarged schematic structural view of the second backflow prevention mechanism shown in fig. 1. The check valve with double valves includes: the valve comprises a valve body 1, a first backflow prevention mechanism 2 and a second backflow prevention mechanism 3.

In the specific implementation process, as shown in fig. 1 and fig. 2, the first backflow prevention mechanism 2 is installed at the central position of the valve body 1, the first backflow prevention mechanism 2 mainly includes a T-shaped rotating rod 21, a jack 23, a T-shaped plug 24, a T-shaped cover plate 26, an external thread 27 and an internal thread 28, the valve body 1 is installed on the upper surface near the top, the T-shaped cover plate 26 is installed on the upper surface near the top, the jack 23 is installed at the central position of the T-shaped cover plate 26, one end of the T-shaped plug 24 is inserted into the lower end of the jack 23, the lower end of the T-shaped rotating rod 21 is inserted into the upper end of the jack 23, the T-shaped plug 24 is connected with the jack 23 in a sliding manner, the internal thread 28 is installed on the inner side of the jack 23, the external thread 27 is installed on the outer side of one end of the T-shaped rotating rod 21, the internal thread 28 is, make T shape rotary rod 21 lower extreme and the contact of T shape stopper 24 top support, the rivers process, can not assault its T shape stopper 24 rebound, thereby can end liquid flow, the normal circulation process of liquid, opposite with preceding rotatory T shape rotary rod 21 direction, rotatory its T shape rotary rod 21, make T shape rotary rod 21 soon to twist out jack 23 position and place, thereby can T shape stopper 24 have the activity space, liquid circulation force can normally promote T shape stopper 24 and remove, liquid can normally circulate, can prevent the liquid reflux process simultaneously.

Referring to fig. 1, the second anti-reflux mechanism 3 is installed at the outlet of the valve body 1, the second anti-reflux mechanism 3 mainly includes a T-shaped sliding rod 31, a limiting rod 32, a spring 33 and a circular cover plate 35, the inner side wall of the outlet of the valve body 1 is provided with a conical groove 34, the circular cover plate 35 is arranged at the opening position of the valve body 1, the inner side wall of the inner part of the valve body 1 close to the circular cover plate 35 is connected with two symmetrically arranged limiting rods 32, one end of the T-shaped sliding rod 31 penetrates through the inner part of the limiting rod 32 and is connected with the side face matched with the circular cover plate 35, the limiting rod 32 is further connected with the side face of the circular cover plate 35 through the spring 33, the spring 33 surrounds the outer surface of one end of the T-shaped sliding rod 31, the second anti-reflux mechanism 3 can perform secondary anti-reflux of liquid, keep inside clean, through liquid impact, spring 33 draws and rises to can let circular apron 33 remove to the deepening in circular conical groove 34, can let liquid normal circulation.

Referring to fig. 1 and 2, a rubber pad is connected to the lower surface of the T-shaped plug 24, and a sealing ring is connected to the outer side surface of the circular cover plate 35, so that the contact position between the T-shaped plug 24 and the circular cover plate 35 has elasticity, the possibility of attachment is increased, and the sealing performance can be increased.

Referring to fig. 1, the outer side wall of the T-shaped rotating rod 21 is connected with a pull ring 22, which is convenient for operation and carrying.

Referring to fig. 1 and 2, two symmetrically arranged screw holes are formed in the outer side surface of the T-shaped cover plate 26, matched screw holes are also formed in the top of the valve body 1 close to the center, and the screw holes are in threaded connection with matched locking screws 25 to enable normal assembly.

The top end face of the T-shaped plug 24 is connected with a rubber pad, so that the collision between the T-shaped plug 24 and the T-shaped rotating rod 21 is reduced, the noise is reduced, and the abrasion is reduced.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A check valve having a dual valve, comprising:

a valve body (1);

the first backflow prevention mechanism (2), the first backflow prevention mechanism (2) is arranged at the central position of the valve body (1), the first backflow prevention mechanism (2) mainly comprises a T-shaped rotating rod (21), an inserting hole (23) and a T-shaped plug (24), the valve comprises a T-shaped cover plate (26), external threads (27) and internal threads (28), wherein the T-shaped cover plate (26) is installed on the upper surface, close to the top, of a valve body (1), the insertion hole (23) is formed in the center position of the T-shaped cover plate (26), one end of a T-shaped plug (24) penetrates through the lower end of the insertion hole (23), the lower end of a T-shaped rotating rod (21) penetrates through the upper end of the insertion hole (23), the T-shaped plug (24) is connected with the insertion hole (23) in a sliding mode, the internal threads (28) are formed in the inner side face of the insertion hole (23), the external threads (27) are formed in the;

and the second backflow prevention mechanism (3), wherein the second backflow prevention mechanism (3) is arranged at the outlet of the valve body (1).

2. The check valve with double valves as claimed in claim 1, wherein the second anti-backflow mechanism (3) mainly comprises a T-shaped sliding rod (31), a limiting rod (32), a spring (33) and a circular cover plate (35), the inner side wall of the outlet of the valve body (1) is provided with a conical groove (34), the circular cover plate (35) is arranged at the opening position of the valve body (1), the inner side wall of the valve body (1) close to the circular cover plate (35) is connected with two symmetrically arranged limiting rods (32), one end of the T-shaped sliding rod (31) penetrates through the interior of the limiting rod (32) and is connected with the matched side surface of the circular cover plate (35), the limiting rod (32) is further connected with the side surface of the circular cover plate (35) through the spring (33), and the spring (33) is wound on the outer surface of one end of the T-shaped sliding rod.

3. The check valve with double valves as claimed in claim 1 or 2, wherein a rubber packing is attached to the lower surface of the T-shaped plug (24), and a packing is attached to the outer side of the circular cover plate (35).

4. The check valve with double valves as claimed in claim 1, wherein a pull ring (22) is connected to an outer side wall of the T-shaped rotating rod (21).

5. The check valve with double valves as claimed in claim 1 or 4, characterized in that the outer side of the T-shaped cover plate (26) is provided with two symmetrically arranged screw holes, the top of the valve body (1) near the center is also provided with matched screw holes, and the screw holes are in threaded connection with matched locking screws (25).

6. The check valve with double valve according to claim 5, characterized in that a rubber pad is attached to the top end face of the T-shaped plug (24).