CN213017909U - Screw thread backflow preventer - Google Patents
Screw thread backflow preventer Download PDFInfo
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- CN213017909U CN213017909U CN202021933802.5U CN202021933802U CN213017909U CN 213017909 U CN213017909 U CN 213017909U CN 202021933802 U CN202021933802 U CN 202021933802U CN 213017909 U CN213017909 U CN 213017909U
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- valve body
- valve
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- main valve
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Abstract
The utility model relates to a pipeline accessory correlation technique field discloses a screw thread backflow preventer, including the main valve body, first vice valve body and the vice valve body of second, set up first check valve core between the first vice valve body and the main valve body, set up the second check valve core between the vice valve body of main valve body and second, set up the valve gap in the upper end of the main valve body, form the valve pocket in the valve gap, set up the outlet at the lower extreme of the main valve body, in the main valve body between valve gap and outlet, set up the valve rod, set up the diaphragm on the valve rod in the valve gap, the diaphragm falls into epicoele and cavity of resorption with the valve pocket, the entrance point of first vice valve body passes through the access connection to the epicoele, and the inner chamber of the main valve body is connected to. The utility model discloses an integral type case structure makes the product structure compacter, and weight is also lighter.
Description
Technical Field
The utility model relates to a relevant technical field of pipeline accessory especially relates to a screw thread backflow preventer.
Background
The existing backflow preventer realizes the one-way flow of media through the circular valve clack, and the structural volume is large in weight, space is not occupied easily, cost is high, the sealing radius is large, and leakage is easy to generate. In a mounting place with a narrow space, the installation of equipment is often not well realized.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above problem, provide a screw thread backflow preventer, through integral type case structure, make the product structure compacter, weight is also lighter.
The utility model adopts the technical proposal that:
a screw thread backflow preventer is characterized by comprising a main valve body, a first auxiliary valve body and a second auxiliary valve body, a first one-way valve core is arranged between the first auxiliary valve body and the main valve body, a second one-way valve core is arranged between the main valve body and the second auxiliary valve body, the first check valve core enables the medium to flow in one direction between the first auxiliary valve body and the main valve body, the second check valve core enables the medium to flow in one direction between the main valve body and the second auxiliary valve body, the upper end of the main valve body is provided with a valve cover, a valve cavity is formed in the valve cover, the lower end of the main valve body is provided with a water outlet, a valve rod is arranged in the main valve body between the valve cover and the water outlet, a membrane is arranged on the valve rod in the valve cover, the diaphragm divides the valve cavity into an upper cavity and a lower cavity, the inlet end of the first auxiliary valve body is connected to the upper cavity through a channel, the inner cavity of the main valve body is connected to the lower cavity, and the lower end of the valve rod is connected with a plug to be matched with the water outlet to be opened and closed.
Further, the first auxiliary valve body and the second auxiliary valve body are connected with the inlet end and the outlet end of the main valve body through threads, and a sealing ring is arranged at the threaded connection position.
Furthermore, a sliding groove is formed in the valve cover, and the upper end of the valve rod is matched in the sliding groove.
Further, the upper end of valve rod still sets up O type sealing washer, the valve rod passes through the cooperation of O type sealing washer in the sliding tray.
Further, a membrane pressing plate is arranged on the membrane.
The utility model has the advantages that:
(1) the integrated valve core enables the product structure to be more compact, the appearance to be more exquisite and the weight to be more light;
(2) the product is stable and has long service life.
Drawings
Fig. 1 is a schematic structural sectional view of the present invention.
The reference numbers in the drawings are respectively:
1. a main valve body; a first sub-valve body;
3. a second sub-valve body; an inlet end;
5. an outlet end 5; 6, sealing rings;
7. a first one-way valve element; a second one-way valve element;
9. sealing the end; 10, a valve cover;
11. a water outlet; a valve stem;
13. a membrane; a diaphragm press plate;
15. a channel; an upper chamber;
17. a lower cavity; 18, a sliding groove;
19. an O-shaped sealing ring.
Detailed Description
The following describes in detail a specific embodiment of the screw thread backflow preventer according to the present invention with reference to the accompanying drawings.
Referring to the attached drawing 1, the screw thread backflow preventer comprises a main valve body 1, a first auxiliary valve body 2 and a second auxiliary valve body 3, wherein the first auxiliary valve body 2 and the second auxiliary valve body 3 are connected with an inlet end 4 and an outlet end 5 of the main valve body 1 through threads, and a sealing ring 6 is arranged at the threaded connection position.
A first one-way valve core 7 is arranged between the first auxiliary valve body 2 and the main valve body 1, a second one-way valve core 8 is arranged between the main valve body 1 and the second auxiliary valve body 3, the two one-way valve cores are of cylindrical structures, and a sealing head 9 is arranged at the front end of each one-way valve core and used for sealing the joint of the main valve body 1 or one side of the auxiliary valve body. The first check valve body 7 forms a one-way medium flow between the first sub valve body 2 and the main valve body 1, and the second check valve body 8 forms a one-way medium flow between the main valve body 1 and the second sub valve body 3.
A valve cover 10 is arranged at the upper end of a main valve body 1, a valve cavity is formed in the valve cover 10, a water outlet 11 is arranged at the lower end of the main valve body 1, a valve rod 12 is arranged in the main valve body 1 between the valve cover 10 and the water outlet 11, a diaphragm 13 is arranged on the valve rod 12 in the valve cover 10, and a diaphragm pressing plate 14 is arranged on the diaphragm 13. The diaphragm 13 divides the valve cavity into an upper cavity 16 and a lower cavity 17, the inlet end of the first sub-valve body 2 is connected to the upper cavity 16 through a passage 15, the inner cavity of the main valve body 1 is connected to the lower cavity 17, and the lower end of the valve rod 12 is connected with a plug to be matched with the water outlet 11 to be opened and closed. The valve cover 10 is provided with a sliding groove 18, the upper end of the valve rod 12 is also provided with an O-shaped sealing ring 19, and the valve rod 12 is matched in the sliding groove 18 through the O-shaped sealing ring 19.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A screw thread backflow preventer is characterized in that: the valve comprises a main valve body, a first auxiliary valve body and a second auxiliary valve body, wherein a first check valve core is arranged between the first auxiliary valve body and the main valve body, a second check valve core is arranged between the main valve body and the second auxiliary valve body, the first check valve core enables a medium to flow in a single direction between the first auxiliary valve body and the main valve body, the second check valve core enables a medium to flow in a single direction between the main valve body and the second auxiliary valve body, a valve cover is arranged at the upper end of the main valve body, a valve cavity is formed in the valve cover, a water outlet is arranged at the lower end of the main valve body, a valve rod is arranged in the main valve body between the valve cover and the water outlet, a membrane is arranged on the valve rod in the valve cover and divides the valve cavity into an upper cavity and a lower cavity, the inlet end of the first auxiliary valve.
2. The thread backflow preventer according to claim 1, wherein: the first auxiliary valve body and the second auxiliary valve body are connected with the inlet end and the outlet end of the main valve body through threads, and a sealing ring is arranged at the threaded connection position.
3. The thread backflow preventer according to claim 1, wherein: the valve cover is provided with a sliding groove, and the upper end of the valve rod is matched in the sliding groove.
4. The thread backflow preventer according to claim 3, wherein: the upper end of the valve rod is also provided with an O-shaped sealing ring, and the valve rod is matched in the sliding groove through the O-shaped sealing ring.
5. The thread backflow preventer according to any one of claims 1 to 4, wherein: and a diaphragm pressing plate is arranged on the diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021933802.5U CN213017909U (en) | 2020-09-07 | 2020-09-07 | Screw thread backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021933802.5U CN213017909U (en) | 2020-09-07 | 2020-09-07 | Screw thread backflow preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213017909U true CN213017909U (en) | 2021-04-20 |
Family
ID=75474772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021933802.5U Active CN213017909U (en) | 2020-09-07 | 2020-09-07 | Screw thread backflow preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213017909U (en) |
-
2020
- 2020-09-07 CN CN202021933802.5U patent/CN213017909U/en active Active
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