CN211550638U

CN211550638U - Novel backflow check valve

Info

Publication number: CN211550638U
Application number: CN201922248592.XU
Authority: CN
Inventors: 陈奎宏; 陈友苗
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-14
Filing date: 2019-12-14
Publication date: 2020-09-22
Anticipated expiration: 2029-12-14

Abstract

The utility model belongs to the technical field of the valve pipe fitting, refer in particular to a novel backflow check valve, including the disk seat, disk seat one end is provided with the inner tube joint, the other end of disk seat is provided with the fixation nut of fretwork, and the mounting hole has been seted up at fixation nut's middle part, and the mounting hole activity is provided with the valve rod, the valve rod overcoat is equipped with first elastic component for the valve rod seals the inner tube joint under the effect of first elastic component. The utility model realizes the constant pressure water outlet of the inner flow passage through the structures of the valve rod, the first elastic piece and the fixing nut; when the number of the branches of the pipeline is more, uniform water outlet of each branch can be realized; when the inner runner is too high, backflow pressure relief can be realized through the outer runner. Additionally, the utility model discloses inner chamber at the valve rod is provided with pressure release case, pressure release elastic component and adjusting nut, and when outer runner pressure was too big, the pressure release hole was opened, and the pressure release backward flow of runner in the realization protects liquid equipment, increases the life of product.

Description

Novel backflow check valve

Technical Field

The utility model belongs to the technical field of the valve pipe fitting, refer in particular to a novel backflow check valve.

Background

In the field of hot water supply, an old-fashioned single pipe is generally adopted to supply hot water, which is deeply welcomed by consumers due to the characteristics of convenient installation, low cost and the like and slowly becomes an industry installation standard and an industry installation standard. However, when the single pipe is long, a large amount of cold water in the pipe needs to be emptied before hot water is used, so that the time for waiting for hot water is long, and a large amount of water resources are wasted.

With the continuous progress of science and technology, the concept of a hot water circulation pipeline is introduced in the field of hot water supply, a hot water supply pipe, a hot water return pipe and a cold water pipe are needed in a hot water loop, and the three pipelines are installed at the same time to achieve the purposes of quick water outlet and recycling of hot water. However, the layout of the three pipes becomes a difficult problem, which causes the problems of large design difficulty, high construction cost, large demand of raw materials for pipelines and the like, and the development is hindered at a little.

In the reason, the applicant designs a single-pipe-in-pipe hot water circulation system, and the core principle of the single-pipe-in-pipe hot water circulation system is that hot water is supplied through one channel and returned through one channel, so that circulation is realized. In order to facilitate the pipeline connection with external equipment such as a water tap, a backflow check valve is required to be designed to connect the external equipment and the water tap.

Disclosure of Invention

The utility model aims at providing a simple structure, long service life goes out water pressure stable's novel backflow check valve.

The purpose of the utility model is realized like this:

the utility model provides a novel backflow check valve, includes the disk seat, and disk seat one end is provided with the inner tube and connects, the other end of disk seat is provided with the fixation nut of fretwork, and the mounting hole has been seted up at fixation nut's middle part, and the mounting hole activity is provided with the valve rod, the valve rod overcoat is equipped with first elastic component for the valve rod seals the inner tube and connects under the effect of first elastic component.

Preferably, the lower end of the valve rod is sleeved with a sealing head, and the first elastic piece abuts between the sealing head and the fixing nut.

Preferably, the lower extreme of valve rod is provided with the flanging, the inside joint groove that is provided with of sealed head, sealed head passes through the joint groove joint on the flanging.

Preferably, the lower end surface of the sealing head is a conical surface and is made of rubber.

Preferably, a cavity is formed in the valve rod, a pressure relief valve core and a pressure relief elastic piece are installed in the cavity, a pressure relief hole is formed in the upper end portion of the pressure relief valve core, and the pressure relief valve core abuts against the pressure relief hole through the pressure relief elastic piece.

Preferably, the pressure relief valve core is T-shaped, a hollow adjusting nut is arranged at the lower end of the valve rod, and the pressure relief elastic piece is arranged between the pressure relief valve core and the adjusting nut.

Preferably, an end of the relief valve body has an arc shape.

Preferably, a threaded inner bushing is arranged at the inner end of the valve seat, the fixing nut is screwed in the threaded inner bushing, and the tightness of the first elastic element can be adjusted by rotating the fixing nut.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

1. the utility model realizes the constant pressure water outlet of the inner flow passage through the structures of the valve rod, the first elastic piece and the fixing nut; when the number of the branches of the pipeline is more, uniform water outlet of each branch can be realized; when the inner runner is too high, backflow pressure relief can be realized through the outer runner. In addition, the tightness of the first elastic piece can be adjusted by rotating the fixing nut, and the size of a set value is adjusted.

2. The pressure relief valve core, the pressure relief elastic piece and the adjusting nut are arranged in the inner cavity of the valve rod, when the pressure of the outer runner is overlarge, the pressure relief hole is opened, the pressure relief backflow of the inner runner is realized, the liquid outlet equipment is protected, and the service life of a product is prolonged; meanwhile, unified water return of each branch pipe in the pipeline can be realized, and due to the fact that the water return can be divided, insufficient pressure of the water outlet end of each branch pipe can be prevented.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the installation structure of the present invention.

The reference numerals in the figures denote the meanings:

1-a valve seat; 2-inner pipe joint; 3-fixing the nut; 4-a valve stem; 5-a first elastic member; 6-sealing the head; 7-pressure relief valve core; 8-a pressure relief elastic member; 9-pressure relief holes; 10-adjusting the nut; 11-an inner flow channel; 12-an outer flow channel; 13-tube in tube; 14-external equipment; 15-threaded inner bushing.

Detailed Description

The invention will be further described with reference to specific embodiments below:

a novel backflow check valve comprises a valve seat 1, wherein the valve seat 1 is of a two-way structure or a three-way structure or a four-way structure. The valve seat is characterized in that an inner pipe connector 2 is coaxially arranged at one end of the valve seat 1 through a connecting rib, a pipe-in-pipe 7 is conveniently installed through the coaxial arrangement, and the inner pipe connector 2 divides an inner cavity of the valve seat 1 into an inner flow passage 11 and an outer flow passage 12. The other end of the valve seat 1 is provided with a threaded inner bushing 15, the threaded inner bushing 15 is connected with a hollowed-out fixing nut 3 and a liquid outlet device 6 in a threaded mode, the hollowed-out position of the fixing nut 3 is used for forming a channel for liquid flowing, the hollowed-out structure is circumferentially arranged in a plurality of through holes, and the valve seat is convenient to disassemble and assemble with the help of tools. The mounting hole has been seted up at fixation nut 3's middle part, and the mounting hole activity is provided with valve rod 4, valve rod 4 overcoat is equipped with first elastic component 5 and sealed

head

6, 5 butt of first elastic component are between sealed head 6 and fixation nut 3. The lower extreme of valve rod 4 is provided with the flanging, sealed head 6 is inside to be provided with the joint groove, sealed head 6 passes through the joint groove joint at the flanging, and easy to assemble is sealed. Under the action of the first elastic member 5, the valve rod 4 is enabled to seal the inner pipe joint 2, in order to increase the sealing performance of the inner flow passage 11, the contact surfaces of the sealing head 6 and the inner pipe joint 2 are set to be conical surfaces, and the sealing head 6 is made of rubber. When the pressure of the inner runner 11 reaches a set value, the water outlet of the liquid outlet equipment 6 is realized; when the number of the branches of the pipeline is more, uniform water outlet of each branch can be realized; when the inner flow passage 11 is too high, the backflow pressure relief can be realized through the outer flow passage 12. In addition, the tightness of the first elastic piece 5 can be adjusted by rotating the fixing nut 3, and the size of a set value is adjusted.

Preferably, a cavity is formed in the valve rod 4, a pressure relief valve core 7 and a pressure relief elastic piece 8 are installed in the cavity, a pressure relief hole 9 is formed in the upper end portion of the valve rod 4, and the end portion of the pressure relief valve core 7 is arc-shaped and abuts against the pressure relief hole 9 through the pressure relief elastic piece 8. For convenience in installation, the cross section of the pressure relief valve core 7 is in a T shape, the lower end of the valve rod 4 is provided with a hollow adjusting nut 10, and the pressure relief elastic piece 8 is arranged between the pressure relief valve core 7 and the adjusting nut 10. When the outer flow passage 12 exceeds the set pressure, the pressure relief hole 9 is opened, backflow of the inner flow passage 11 is achieved, the liquid outlet equipment 6 is protected, unified water return of all branch pipes in the pipeline can also be achieved, and due to the fact that partial pressure can be achieved by the water return, insufficient pressure at the water outlet end of each branch pipe can be prevented.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a novel backflow check valve, includes disk seat (1), and disk seat (1) one end is provided with inner tube connector (2), its characterized in that: the other end of disk seat (1) is provided with mounting nut (3) of fretwork, and the mounting hole has been seted up at the middle part of mounting nut (3), and the mounting hole activity is provided with valve rod (4), valve rod (4) overcoat is equipped with first elastic component (5), under the effect of first elastic component (5) for valve rod (4) seal inner tube connects (2).

2. The new backflow check valve as claimed in claim 1, wherein: the lower end of the valve rod (4) is sleeved with a sealing head (6), and the first elastic piece (5) is abutted between the sealing head (6) and the fixing nut (3).

3. A new backflow check valve as claimed in claim 2, wherein: the lower extreme of valve rod (4) is provided with the flanging, sealed head (6) inside is provided with the joint groove, sealed head (6) pass through the joint groove joint on the flanging.

4. A new backflow check valve as claimed in claim 3, wherein: the lower end face of the sealing head (6) is a conical surface and is made of rubber.

5. A novel back flow check valve as claimed in any one of claims 1-4, wherein: a cavity is formed in the valve rod (4), a pressure relief valve core (7) and a pressure relief elastic piece (8) are installed in the cavity, a pressure relief hole (9) is formed in the upper end portion of the pressure relief valve core, and the pressure relief valve core (7) abuts against the pressure relief hole (9) through the pressure relief elastic piece (8).

6. The new backflow check valve as claimed in claim 5, wherein: the pressure relief valve core (7) is T-shaped, the lower end of the valve rod (4) is provided with a hollow adjusting nut (10), and the pressure relief elastic piece (8) is arranged between the pressure relief valve core (7) and the adjusting nut (10).

7. The new backflow check valve as claimed in claim 6, wherein: the end part of the pressure relief valve core (7) is arc-shaped.

8. The new backflow check valve as claimed in claim 1, wherein: the inner end of the valve seat (1) is provided with a threaded inner bushing (15), the fixing nut (3) is screwed in the threaded inner bushing (15), and the tightness of the first elastic part (5) can be adjusted by rotating the fixing nut (3).