CN214662283U

CN214662283U - Screw thread type backflow preventer free of externally-matched catheter

Info

Publication number: CN214662283U
Application number: CN202120279980.9U
Authority: CN
Inventors: 胡启明; 吴成祝; 姚惟秀
Original assignee: Anhui Zhongsite Fluid Equipment Co ltd
Current assignee: Anhui Zhongsite Fluid Equipment Co ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-11-09
Anticipated expiration: 2031-02-01

Abstract

The utility model relates to a backflow preventer technical field, and a screw thread type backflow preventer of exempting from external pipe of joining in marriage is disclosed, including backflow preventer body, backflow preventer body includes the inlet tube, sluicing valves and two check valve plates, the sluicing end fixedly connected with pipe of backflow preventer body, the lower extreme fixedly connected with valve box of pipe, the fixed check valve group that is equipped with in inside of valve box, the lower extreme fixedly connected with connecting pipe of valve box, the outside cover of inlet tube is equipped with annular cover and encloses synthetic annular chamber through annular cover, the fixed annular electrothermal tube that is equipped with in inside of annular chamber, the inside packing of annular chamber has heat conduction liquid. The utility model discloses under the lower circumstances of ambient temperature, can prevent that water from influencing the earial drainage of water at the inside effluvium that freezes of backflow preventer, reduce water pollution's possibility, need not external pipe, reduce the waste of water resource, can increase the stability of connecting between two check valve plates simultaneously.

Description

Screw thread type backflow preventer free of externally-matched catheter

Technical Field

The utility model relates to a backflow preventer technical field especially relates to a screw thread type backflow preventer of exempting from outer pipe of joining in marriage.

Background

The backflow preventer consists of two separated check valves and a hydraulic drain valve, because of the local head loss of the check valves, the pressure in the middle cavity is always lower than the pressure of the water inlet, the pressure difference drives the drain valve to be in a closed state, the pipeline supplies water normally, when the pressure is abnormal (namely, the pressure at the outlet end is higher than the pressure in the middle cavity), even if the two check valves can not be sealed reversely, the safe drain valve can be automatically opened to drain the backflow water, an air partition is formed, the upstream water supply sanitation and safety are ensured, and the screw thread type is one type of the backflow preventer.

At present, screw thread type backflow preventer is in daily use, its outlet end of sluice valve generally needs external pipe to lead out water, need correspond the external pipe of specification, and install through specialized tool, it is comparatively loaded down with trivial details to use, simultaneously when winter, because ambient temperature is lower, water easily freezes in backflow preventer inside, lead to having the phenomenon that water can't in time leak out, thereby can lead to the water pollution phenomenon, consequently, provide a screw thread type backflow preventer of exempting from external pipe of joining in marriage.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving among the prior art sluicing valve outlet end and generally needing external pipe to derive water, need correspond the external pipe of specification, and install through specialized tool, it is comparatively loaded down with trivial details to use, simultaneously when winter, because ambient temperature is lower, water easily freezes in backflow preventer inside, lead to having the phenomenon that water can't in time leak out, thereby can lead to the problem of water pollution phenomenon, and the screw thread type backflow preventer of exempting from external pipe of proposing.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a screw thread type backflow preventer free of externally-matched guide pipes comprises a backflow preventer body, wherein the backflow preventer body comprises a water inlet pipe, a water drain valve group and two check valve plates, the water drain end of the backflow preventer body is fixedly connected with a guide pipe, the lower end of the guide pipe is fixedly connected with a valve box, a one-way valve group is fixedly arranged inside the valve box, the lower end of the valve box is fixedly connected with a connecting pipe, an annular cover is sleeved outside the water inlet pipe and surrounds the water inlet pipe into an annular cavity through the annular cover, an annular electric heating pipe is fixedly arranged inside the annular cavity, heat-conducting liquid is filled inside the annular cavity, a fixing block is fixedly connected to the upper end of the annular cover, a groove is formed in the upper end of the fixing block, an inserting seat is fixedly arranged inside the groove and is electrically connected with the annular electric heating pipe, and a lead plug is electrically inserted into the inserting seat, the wire plug is connected with a locking mechanism and is connected with the fixed block through the locking mechanism.

Preferably, two be equipped with the frame shape pole between the check valve plate, and the outside movable sleeve that the frame shape pole is located the outlet valve group establishes, the equal fixedly connected with connecting rod in both ends about the frame shape pole, and two opposite both ends of connecting rod respectively with the lateral wall fixed connection of two check valve plate one side in opposite directions.

Preferably, the fixed grafting of the inside wall of annular chamber has a plurality of evenly distributed's T shape heat conduction pole, every the one end that annular cover was kept away from to T shape heat conduction pole all runs through the interior rampart of annular chamber and extends to the inside setting of inlet tube.

Preferably, locking mechanism includes internal thread cover and clamping ring, the lateral wall upper end threaded connection of the inside wall lower extreme of internal thread cover and fixed block, the clamping ring is located the fixed setting of the inside upside of internal thread cover, the lower extreme of clamping ring offsets with the upper end of wire plug and sets up.

Preferably, the side wall of the wire plug is fixedly sleeved with a rubber sealing sleeve, and the outer side wall of the rubber sealing sleeve is abutted to the inner side wall of the groove.

Preferably, the lower end of the outer ring wall of the annular cavity is fixedly connected with a liquid outlet pipe, and the outer side wall of the liquid outlet pipe is in threaded connection with a sealing cover.

Compared with the prior art, the utility model provides a screw thread type backflow preventer of exempting from to join in marriage pipe outward possesses following beneficial effect:

1. this exempt from screw thread type backflow preventer of joining in marriage pipe outward, backflow preventer body through the refluence that is equipped with, can regard as the waterproof refluence device of pipeline to use, through the pipe that is equipped with, mutually support of valve box and check valve group, can be inside the leading-in domestic water pipeline of pipe with the water that the outlet valve leaks, check valve group can prevent the water backward flow, annular cover through being equipped with, the annular electrothermal tube, the fixed block, mutually support of plug socket and wire plug, under the lower circumstances of ambient temperature, can carry out heating of certain degree to inside to the inlet tube, prevent that water from freezing the earial drainage of influence water in backflow preventer inside, reduce water pollution's possibility.

2. This exempt from screw thread type backflow preventer of joining in marriage pipe outward, through the frame shape pole that is equipped with and mutually supporting of two connecting rods, can increase the stability of connecting between two check valve plates, even after the spring of one of them check valves damages, also can realize the non return function of two check valves through another spring, through a plurality of T shape heat-conducting rods that are equipped with, can improve the efficiency of heating water.

The part that does not relate to in the device all is the same with prior art or can adopt prior art to realize, the utility model discloses under the lower condition of ambient temperature, can prevent that water from influencing the earial drainage of water at the inside icy discharge of refluence preventer, reduce water pollution's possibility, need not external pipe, reduce the waste of water resource, can increase the stability of connecting between two check valve plates simultaneously.

Drawings

FIG. 1 is a schematic structural view of a screw thread type backflow preventer without an externally attached catheter according to the present invention;

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

fig. 3 is a schematic top view of the frame-shaped bar of fig. 1.

In the figure: 1 backflow preventer body, 2 inlet tubes, 3 sluicing valve groups, 4 check valve plates, 5 conduits, 6 valve boxes, 7 annular covers, 8 annular electric heating tubes, 9 fixed blocks, 10 plug sockets, 11 lead plugs, 12 frame-shaped rods, 13 connecting rods, 14T-shaped heat conducting rods, 15 internal thread sleeves, 16 compression rings, 17 rubber seal sleeves and 18 liquid outlet pipes.

Detailed Description

The technical solutions in the embodiments 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.

Referring to fig. 1-3, a screw thread type backflow preventer free of externally-fitted conduits, comprising a backflow preventer body 1, wherein the backflow preventer body 1 comprises a water inlet pipe 2, a water outlet valve group 3 and two check valve plates 4, the water outlet end of the backflow preventer body 1 is fixedly connected with a conduit 5, the lower end of the conduit 5 is fixedly connected with a valve box 6, the interior of the valve box 6 is fixedly provided with a one-way valve group, the lower end of the valve box 6 is fixedly connected with a connecting pipe, the outer side of the water inlet pipe 2 is sleeved with an annular cover 7 and encloses into an annular cavity through the annular cover 7, the interior of the annular cavity is fixedly provided with an annular electric heating tube 8, the interior of the annular cavity is filled with heat-conducting liquid, the upper end of the annular cover 7 is fixedly connected with a fixed block 9, the upper end of the fixed block 9 is provided with a groove, the interior of the groove is fixedly provided with an inserting base 10, the inserting base 10 is electrically connected with the annular electric heating tube 8, the inserting base 10 is electrically inserted with a wire plug 11, the wire plug 11 is connected with a locking mechanism and is connected with the fixed block 9 through the locking mechanism.

Be equipped with frame shape pole 12 between two check valve boards 4, and frame shape pole 12 is located the outside movable sleeve of sluicing valves 3 and establishes, the equal fixedly connected with connecting rod 13 in both ends about frame shape pole 12, and two opposite both ends of connecting rod 13 respectively with the lateral wall fixed connection of two check valve boards 4 one side in opposite directions, can increase the stability of connecting between two check valve boards 4, even after the spring of one of them check valve group damages, also can realize the non return function of two check valves through another spring.

The fixed grafting of the inside wall of annular chamber has a plurality of evenly distributed's T shape heat conduction pole 14, and the one end that annular cover 7 was kept away from to every T shape heat conduction pole 14 all runs through the interior rampart of annular chamber and extends to the inside setting of inlet tube 2, can improve the efficiency of heating water.

Locking mechanism includes internal thread cover 15 and clamping ring 16, and the inside wall lower extreme of internal thread cover 15 and the lateral wall upper end threaded connection of fixed block 9, clamping ring 16 are located the fixed setting of the inside upside of internal thread cover 15, and the lower extreme of clamping ring 16 offsets with the upper end of wire plug 11 and sets up, twists internal thread cover 15 to fixed block 9 on to can compress tightly locking wire plug 11 through clamping ring 16.

The side wall of the wire plug 11 is fixedly sleeved with a rubber sealing sleeve 17, the outer side wall of the rubber sealing sleeve 17 is abutted to the inner side wall of the groove, and the tightness of connection between the wire plug 11 and the groove can be improved.

The lower end of the outer ring wall of the annular cavity is fixedly connected with a liquid outlet pipe 18, the outer side wall of the liquid outlet pipe 18 is in threaded connection with a sealing cover, the sealing cover is screwed, the liquid outlet pipe 18 can be opened, and therefore the heat conducting liquid can be replaced.

The utility model discloses in, during the use, install backflow preventer body 1 on the pipeline, 3 work of sluicing valves, can let out water through pipe 5, be linked together connecting pipe and domestic water pipeline, then can be inside leading-in domestic water pipeline with the water of letting out, reduce the waste of water resource, and under the cooperation of check valve and valve box 6, can prevent that the inside water of domestic water pipeline from getting into inside pipe 5, under the lower condition of ambient temperature, can be connected with external power supply through wire plug 11, thereby can start electrothermal tube 8, heat with heat conduction liquid, thereby can heat the inside water of inlet tube 2, with prevent remaining water and at backflow preventer body 1 inside influence sluicing, reduce the possibility of water pollution.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a screw thread type backflow preventer of exempting from external piping, includes backflow preventer body (1), its characterized in that, backflow preventer body (1) includes inlet tube (2), sluicing valves (3) and two check valve plates (4), the sluicing end fixedly connected with pipe (5) of backflow preventer body (1), the lower extreme fixedly connected with valve box (6) of pipe (5), the inside of valve box (6) is fixed and is equipped with the check valve group, the lower extreme fixedly connected with connecting pipe of valve box (6), the outside cover of inlet tube (2) is equipped with annular cover (7) and encloses synthetic annular chamber through annular cover (7), the inside of annular chamber is fixed and is equipped with annular electrothermal tube (8), the inside of annular chamber is filled with heat-conducting liquid, the upper end fixedly connected with fixed block (9) of annular cover (7), the improved electric heating tube is characterized in that a groove is formed in the upper end of the fixing block (9), a plug socket (10) is fixedly arranged inside the groove, the plug socket (10) is electrically connected with the annular electric heating tube (8), a wire plug (11) is electrically plugged into the plug socket (10), and the wire plug (11) is connected with a locking mechanism and is connected with the fixing block (9) through the locking mechanism.

2. The thread type backflow preventer free of an externally-fitted conduit according to claim 1, wherein a frame-shaped rod (12) is arranged between the two check valve plates (4), the frame-shaped rod (12) is movably sleeved outside the water drain valve group (3), the left end and the right end of the frame-shaped rod (12) are both fixedly connected with connecting rods (13), and opposite ends of the two connecting rods (13) are respectively fixedly connected with the side walls of the opposite sides of the two check valve plates (4).

3. The screw thread type backflow preventer free of an externally-fitted conduit according to claim 1, wherein a plurality of T-shaped heat conducting rods (14) are fixedly inserted into the inner side wall of the annular cavity, and one end of each T-shaped heat conducting rod (14), which is far away from the annular cover (7), penetrates through the inner annular wall of the annular cavity and extends to the inside of the water inlet pipe (2).

4. The screw thread type backflow preventer free of the externally-fitted conduit according to claim 1, wherein the locking mechanism comprises an internal thread sleeve (15) and a pressing ring (16), the lower end of the inner side wall of the internal thread sleeve (15) is in threaded connection with the upper end of the outer side wall of the fixing block (9), the pressing ring (16) is located on the upper side of the inner side of the internal thread sleeve (15) and is fixedly arranged, and the lower end of the pressing ring (16) is abutted to the upper end of the wire plug (11).

5. The screw thread type backflow preventer free of an externally-fitted conduit according to claim 1, wherein a rubber sealing sleeve (17) is fixedly sleeved on a side wall of the lead plug (11), and an outer side wall of the rubber sealing sleeve (17) is abutted against an inner side wall of the groove.

6. The screw thread type backflow preventer free of an externally-fitted conduit according to claim 1, wherein a liquid outlet pipe (18) is fixedly connected to the lower end of the outer annular wall of the annular cavity, and a sealing cover is threadedly connected to the outer side wall of the liquid outlet pipe (18).