Low-resistance backflow preventer with upper drainer
By designing a low-resistance backflow preventer with an upper drain, and employing a backflow preventer baffle and spring structure, multiple anti-backflow operations and atmospheric pressure isolation are achieved, solving the problem of poor anti-backflow effect of existing backflow preventers and improving anti-backflow performance and drainage flexibility.
Patent Information
- Application Number
- CN202423210376.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-25
AI Technical Summary
Existing backflow preventers lack atmospheric pressure isolation structures and functions, and their effectiveness needs to be improved.
A low-resistance backflow preventer with an upper drain was designed. It adopts a backflow preventer and spring structure, combined with a multi-directional drain pipe and atmospheric pressure isolation function to achieve multiple anti-backflow operation and atmospheric pressure isolation.
It effectively prevents water backflow, has atmospheric pressure isolation function, simple and sturdy structure, low manufacturing and maintenance cost, high drainage flexibility, and strong anti-backflow performance.
Smart Images
Figure CN223595090U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to backflow preventer technical field especially contain the low resistance backflow preventer of upper water drainer. BACKGROUND
[0002] In contemporary industrialized production and processing, fluid is transported through fixed pipeline, which can greatly improve fluid transfer efficiency, in order to control the complex conveying line, it is necessary to install various control equipment at the specific position of the conveying line, including backflow preventer.
[0003] The existing backflow preventer has single internal prevention structure, lacks atmospheric pressure isolation structure and function, and the prevention effect needs to be improved. UTILITY MODEL CONTENT
[0004] The utility model discloses a kind of low resistance backflow preventer containing upper water drainer can carry out multi-way prevention operation, and atmospheric pressure isolation operation, practicality is strong.
[0005] To achieve the above object, the utility model provides the following technical scheme:
[0006] A kind of low resistance backflow preventer containing upper water drainer, including main cylinder body, the outer surface of the main cylinder body is integrally connected with water inlet cylinder body and drainage cylinder body, the communication of the main cylinder body and water inlet cylinder body is equipped with first inner mounting seat, first fixed shaft is slidably connected in the middle position of the first inner mounting seat, first fixed shaft is slidably connected with first reverse baffle outside, the first reverse baffle is located in the interior of main cylinder body, first spring is sleeved with the outside of first fixed shaft, one end of the first spring is on the outer surface of first reverse baffle, the communication of the main cylinder body and drainage cylinder body is equipped with second inner mounting seat, second fixed shaft is installed in the middle position of the second inner mounting seat, second fixed shaft is slidably connected with second reverse baffle outside, the second reverse baffle is located in the interior of drainage cylinder body, one end of the second fixed shaft is equipped with limit stop ring, second spring is sleeved with the outside of second fixed shaft, two ends of the second spring are respectively on the outer surface of second reverse baffle and limit stop ring, the side surface of water inlet cylinder body and drainage cylinder body is fixedly connected with a first drain pipe, second ball valve is installed in the pipeline of the first drain pipe.
[0007] By adopting the above technical scheme, smooth drainage can be carried out while avoiding water backflow, and the entire reverse device structure is simple and firm.
[0008] Further, the side surface of the main cylinder body is provided with a mounting port, and a second valve cover is mounted at the mounting port, a top drain pipe is threadedly mounted at the central axis position of the second valve cover, one end of the top drain pipe is externally slidably sleeved with a limiting pipe base, one end of the limiting pipe base is fixedly connected with one end of a first fixed shaft, one end of the first spring is externally sleeved with the limiting pipe base, and the one end of the first spring is limitingly fixed with one end of the limiting pipe base, a piston plate is mounted in the mounting port of the main cylinder body, the piston plate is externally slidably sleeved with the top drain pipe, and the piston plate is provided with a compression cavity on one side.
[0009] By adopting the technical scheme, the atmospheric pressure can be cut off.
[0010] Further, the top of the main cylinder body is provided with a discharge port, and a first ball valve is mounted at the discharge port.
[0011] By adopting the technical scheme, the multi-directional drainage operation can be performed.
[0012] Further, the side surface of the main cylinder body is provided with an inspection port, and a first valve cover is mounted at the inspection port.
[0013] By adopting the technical scheme, the internal structure can be conveniently inspected.
[0014] Further, the bottom of the main cylinder body is provided with a drain port, and a third valve cover is mounted at the drain port, a second drain pipe is threadedly mounted at the middle position of the third valve cover, a drain piston is slidably sleeved with one end of the second drain pipe, a communication hole is formed on the side surface of the drain piston, an end head is threadedly connected with the middle position of the third valve cover, and the end head corresponds to the position of one end of the second drain pipe.
[0015] By adopting the technical scheme, the water in the main cylinder body can be discharged when the main cylinder body is inspected.
[0016] Further, a bend is threadedly mounted at the central axis position of the second valve cover, and the bend corresponds to the position of one end of the top drain pipe.
[0017] By adopting the technical scheme, the check valve can be conveniently connected with the external pipeline.
[0018] In summary, the beneficial technical effects of the utility model are as follows:
[0019] 1. The utility model discloses a water inlet cylinder body's water inlet can guide the water into the inside of water inlet cylinder body, when the pressure reaches certain degree, water top first non -return flap moves along the central axis of first fixed axle, make first non -return flap with first inner mounting seat separate, when the water of water inlet cylinder body inside can flow into the inside of main cylinder body, by analogy, along with the water pressure of main cylinder body inside rises, water top second non -return flap moves along the axial movement of second fixed axle, make second non -return flap with second inner mounting seat separate, when the water in main cylinder body can flow into the inside of drainage cylinder body, finally from the drainage port of drainage cylinder body and discharge, when the water pressure of drainage cylinder body inside is greater than the water pressure of main cylinder body inside, the water pressure of main cylinder body inside is greater than the water pressure of water inlet cylinder body inside, the direction of the exertion of first spring is identical with the moving direction of first non -return flap, the exertion of second spring is identical with the moving direction of second non -return flap, and then can make first non -return flap tightly block one end of first inner mounting seat, and second non -return flap can tightly block one end of second inner mounting seat, thereby can effectively avoid the condition that water flows back, and the overall structure is simple, firm and effective, and the manufacturing cost and maintenance cost are low, and two first drainage pipes on the side surface of water inlet cylinder body and drainage cylinder body can carry out multidirectional drainage operation, the overall drainage flexibility is high, and can carry out multi -way non -return operation, and the practicality is strong.
[0020] 2. The utility model discloses can when the inside pressure of water inlet cylinder body and main cylinder body is less than the inside pressure of compression chamber, piston plate moves along the axial movement of upper drainage pipe, and piston plate can effectively top limit tube seat and move, and simultaneously carry out compression operation to first spring, when the end of upper drainage pipe and the inside end surface of limit tube seat separate, and the through -hole on the side surface of limit tube seat is communicated with the inside of upper drainage pipe, and then make upper drainage pipe with the inside of main cylinder body is communicated, when can extract the water in the inside of main cylinder body through external upper drainage equipment, can further reduce the pressure in the inside of main cylinder body, can make this prevent the atmospheric pressure and cut off function, and the performance that prevents backflow has been further improved. ACCURACY
[0021] Figure 1 It is the three -dimensional structure schematic diagram of the utility model;
[0022] Figure 2 It is the inside structure drawing of the utility model.
[0023] In the figure: 1, main cylinder body; 2, first valve cover; 3, first ball valve; 4, second valve cover; 5, elbow; 6, water inlet cylinder body; 7, water outlet cylinder body; 8, first water outlet pipe; 9, second ball valve; 10, upper water outlet pipe; 11, limiting pipe seat; 12, first spring; 13, first inner mounting seat; 14, third valve cover; 15, end head; 16, second water outlet pipe; 17, water outlet piston; 18, first fixed shaft; 19, first non-return baffle; 20, second inner mounting seat; 21, second non-return baffle; 22, second spring; 23, second fixed shaft; 24, limiting baffle ring; 25, piston plate; 26, compression cavity. DETAILED DESCRIPTION
[0024] The utility model method will be described in further detail below with reference to the drawings.
[0025] Reference Figure 1 , Figure 2The utility model provides a low resistance backflow preventer containing upper drain, including main cylinder body 1, integral connection has water inlet cylinder body 6 and drain cylinder body 7 on the outer surface of main cylinder body 1, and the communication of main cylinder body 1 and water inlet cylinder body 6 is equipped with first inner mounting seat 13, and the middle position of first inner mounting seat 13 is slidably connected with first fixed shaft 18, and the outside of first fixed shaft 18 is slidably sleeved with first reverse stop baffle 19, and first reverse stop baffle 19 is located in the inside of main cylinder body 1, and the outside of first fixed shaft 18 is sleeved with first spring 12, and one end of first spring 12 is abutted on the outer surface of first reverse stop baffle 19, and the communication of main cylinder body 1 and drain cylinder body 7 is equipped with second inner mounting seat 20, and the middle position of second inner mounting seat 20 is equipped with second fixed shaft 23, and the outside of second fixed shaft 23 is slidably sleeved with second reverse stop baffle 21, and second reverse stop baffle 21 is located in the inside of drain cylinder body 7, and one end of second fixed shaft 23 is equipped with limiting baffle 24, and the outside of second fixed shaft 23 is sleeved with second spring 22, and the both ends of second spring 22 are abutted on the outer surface of second reverse stop baffle 21 and limiting baffle 24 respectively, and the side surface of water inlet cylinder body 6 and drain cylinder body 7 is fixedly connected with a first drain pipe 8, and the pipeline of first drain pipe 8 is equipped with second ball valve 9, and when using, water can be introduced into the inside of water inlet cylinder body 6 by the water inlet of water inlet cylinder body 6, when the pressure reaches a certain degree, water drives first reverse stop baffle 19 to move along the central axis of first fixed shaft 18, so that first reverse stop baffle 19 is separated from first inner mounting seat 13, at this time, the water in the inside of water inlet cylinder body 6 can flow into the inside of main cylinder body 1, and similarly, along with the water pressure in the inside of main cylinder body 1, water drives second reverse stop baffle 21 to move along the axial direction of second fixed shaft 23, so that second reverse stop baffle 21 is separated from second inner mounting seat 20, at this time, the water in the inside of main cylinder body 1 can flow into the inside of drain cylinder body 7, and finally is discharged from the drain port of drain cylinder body 7, when the water pressure in the inside of drain cylinder body 7 is greater than the water pressure in the inside of main cylinder body 1, and the water pressure in the inside of main cylinder body 1 is greater than the water pressure in the inside of water inlet cylinder body 6, the direction of the force exerted by first spring 12 is consistent with the moving direction of first reverse stop baffle 19, and the direction of the force exerted by second spring 22 is consistent with the moving direction of second reverse stop baffle 21, so that first reverse stop baffle 19 can tightly block one end of first inner mounting seat 13, and second reverse stop baffle 21 can tightly block one end of second inner mounting seat 20, so that the backflow of water flow can be effectively avoided, the overall structure is simple, firm and effective, the manufacturing cost and the maintenance cost are low, and the two first drain pipes 8 arranged on the side surfaces of water inlet cylinder body 6 and drain cylinder body 7 can carry out multidirectional drainage operation, the overall drainage flexibility is high, and can carry out multi-reverse operation, and the practicability is strong.
[0026] Refer to Figure 2The side surface of the main cylinder body 1 is provided with a mounting port, and the second valve cover 4 is mounted at the mounting port, and the upper drain pipe 10 is threadedly mounted at the central axis position of the second valve cover 4, the side surface of the upper drain pipe 10 is provided with two through holes, one end of the upper drain pipe 10 is externally and slidingly sleeved with a limiting pipe seat 11, one end of the limiting pipe seat 11 is fixedly connected with one end of the first fixed shaft 18, one end of the first spring 12 is sleeved outside the limiting pipe seat 11 and is limitingly fixed with one end of the limiting pipe seat 11, the piston plate 25 is mounted in the mounting port of the main cylinder body 1, the piston plate 25 is slidingly sleeved outside the upper drain pipe 10, one side of the piston plate 25 is provided with a compression cavity 26, the elbow 5 is threadedly mounted at the central axis position of the second valve cover 4, the elbow 5 corresponds to the position of one end of the upper drain pipe 10, wherein when the internal pressure of the water inlet cylinder body 6 and the main cylinder body 1 is less than the internal pressure of the compression cavity 26, the piston plate 25 moves along the axial direction of the upper drain pipe 10, the piston plate 25 can effectively drive the limiting pipe seat 11 to move, and the first spring 12 is compressed at the same time, at this time, the end of the upper drain pipe 10 is separated from the internal end surface of the limiting pipe seat 11, and the through hole on the side surface of the limiting pipe seat 11 is communicated with the inside of the upper drain pipe 10, so that the upper drain pipe 10 is communicated with the inside of the main cylinder body 1, at this time, the water in the main cylinder body 1 can be extracted by the external drain device, the pressure in the main cylinder body 1 can be further reduced, the atmospheric pressure blocking function of the preventer is achieved, and the anti-backflow performance is further improved.
[0027] Referring to Figure 2 The top of the main cylinder body 1 is provided with a discharge port, and the first ball valve 3 is mounted at the discharge port, the side surface of the main cylinder body 1 is provided with an inspection port, and the first valve cover 2 is mounted at the inspection port, the bottom of the main cylinder body 1 is provided with a drain port, and the third valve cover 14 is mounted at the drain port, the second drain pipe 16 is threadedly mounted at the middle position of the third valve cover 14, the drain piston 17 is slidingly sleeved outside one end of the second drain pipe 16, the side surface of the drain piston 17 is provided with a communication hole, the end head 15 is threadedly connected at the middle position of the third valve cover 14, and the end head 15 corresponds to the position of one end of the second drain pipe 16, wherein during the inspection, the end head 15 is disassembled, then an external tool is inserted through the second drain pipe 16 to drive the drain piston 17, so that the through hole on the side surface of the drain piston 17 is communicated with the inside of the second drain pipe 16, at this time, the water in the main cylinder body 1 can be orderly discharged along the second drain pipe 16, and then the first valve cover 2 is opened to perform the inspection operation on the internal structure, and the inspection operation is convenient and efficient.
[0028] Working principle: first, the backflow preventer is installed at the designated location, when using, the water inlet of the water inlet cylinder body 6 is used to guide the water into the inside of the water inlet cylinder body 6, when the pressure reaches a certain degree, the water drives the first check baffle 19 to move along the central axis of the first fixed shaft 18, so that the first check baffle 19 is separated from the first inner mounting seat 13, at this time, the water in the inside of the water inlet cylinder body 6 can flow into the inside of the main cylinder body 1, similarly, as the water pressure in the inside of the main cylinder body 1 rises, the water drives the second check baffle 21 to move along the axial direction of the second fixed shaft 23, so that the second check baffle 21 is separated from the second inner mounting seat 20, at this time, the water in the main cylinder body 1 can flow into the inside of the water outlet cylinder body 7, and finally is discharged from the water outlet port of the water outlet cylinder body 7, when the water pressure in the inside of the water outlet cylinder body 7 is greater than the water pressure in the inside of the main cylinder body 1, and the water pressure in the inside of the main cylinder body 1 is greater than the water pressure in the inside of the water inlet cylinder body 6, the direction of the exerted force of the first spring 12 is consistent with the moving direction of the first check baffle 19, the direction of the exerted force of the second spring 22 is consistent with the moving direction of the second check baffle 21, and then the first check baffle 19 can tightly block one end of the first inner mounting seat 13, and the second check baffle 21 can tightly block one end of the second inner mounting seat 20, so that the backflow of water can be effectively avoided, in this process, when the pressure in the inside of the water inlet cylinder body 6 and the main cylinder body 1 is less than the pressure in the inside of the compression cavity 26, the piston plate 25 moves along the axial direction of the upper water outlet pipe 10, the piston plate 25 can effectively drive the limiting pipe seat 11 to move, and the first spring 12 is compressed at the same time, at this time, the end of the upper water outlet pipe 10 is separated from the inner end surface of the limiting pipe seat 11, and the through hole in the side surface of the limiting pipe seat 11 is communicated with the inside of the upper water outlet pipe 10, so that the upper water outlet pipe 10 is communicated with the inside of the main cylinder body 1, at this time, the water in the inside of the main cylinder body 1 can be extracted by the external water outlet device, the pressure in the inside of the main cylinder body 1 can be further reduced, the backflow prevention device can have the atmospheric pressure blocking function, and the backflow prevention performance is further improved, when the backflow prevention device fails, the end head 15 is disassembled, then an external tool is used to pass through the second water outlet pipe 16 and drive the water outlet piston 17, so that the through hole in the side surface of the water outlet piston 17 is communicated with the inside of the second water outlet pipe 16, at this time, the water in the inside of the main cylinder body 1 can be orderly discharged along the second water outlet pipe 16, and then the first valve cover 2 is opened, so that the internal structure can be overhauled.
[0029] The embodiments of the specific embodiment are the preferred embodiments of the utility model, not limited by this, the protection scope of the utility model, therefore: all equivalent changes made according to the structure, shape, principle of the utility model should be covered in the protection scope of the utility model.
Claims
1. A low resistance backflow preventer with a upper drain, comprising a main cylinder (1), characterized in that: The outer surface of the main cylinder body (1) is integrally connected with a water inlet cylinder body (6) and a water outlet cylinder body (7), a first inner mounting seat (13) is mounted at the communication position of the main cylinder body (1) and the water inlet cylinder body (6), a first fixed shaft (18) is slidingly connected at the middle position of the first inner mounting seat (13), a first non-return baffle (19) is slidingly sleeved on the outer portion of the first fixed shaft (18), the first non-return baffle (19) is located in the interior of the main cylinder body (1), a first spring (12) is sleeved on the outer portion of the first fixed shaft (18), one end of the first spring (12) abuts against the outer surface of the first non-return baffle (19), a second inner mounting seat (20) is mounted at the communication position of the main cylinder body (1) and the water outlet cylinder body (7), a second fixed shaft (23) is mounted at the middle position of the second inner mounting seat (20), a second non-return baffle (21) is slidingly sleeved on the outer portion of the second fixed shaft (23), the second non-return baffle (21) is located in the interior of the water outlet cylinder body (7), a limiting baffle ring (24) is mounted at one end of the second fixed shaft (23), a second spring (22) is sleeved on the outer portion of the second fixed shaft (23), the two ends of the second spring (22) abut against the outer surfaces of the second non-return baffle (21) and the limiting baffle ring (24) respectively, a first drain pipe (8) is fixedly connected to the side surface of each of the water inlet cylinder body (6) and the water outlet cylinder body (7), and a second ball valve (9) is mounted in the pipeline of the first drain pipe (8).
2. A low resistance backflow preventer containing an upper drain according to claim 1, characterized in that: A mounting opening is arranged on the side surface of the main cylinder body (1), and a second valve cover (4) is mounted at the mounting opening, an upper drain pipe (10) is threadedly mounted at the middle axial position of the second valve cover (4), a limiting pipe seat (11) is slidingly sleeved on the outer end of the upper drain pipe (10), one end of the limiting pipe seat (11) is fixedly connected with one end of the first fixed shaft (18), one end of the first spring (12) is sleeved on the outer portion of the limiting pipe seat (11) and is fixedly limited with one end of the limiting pipe seat (11), a piston plate (25) is mounted in the mounting opening of the main cylinder body (1), the piston plate (25) is slidingly sleeved on the outer portion of the upper drain pipe (10), and a compression cavity (26) is arranged on one side of the piston plate (25).
3. A low resistance backflow preventer with an upper drain according to claim 1, characterized in that: A discharge opening is arranged on the top of the main cylinder body (1), and a first ball valve (3) is mounted at the discharge opening.
4. A low resistance backflow preventer with an upper drain according to claim 1, wherein: A maintenance opening is arranged on the side surface of the main cylinder body (1), and a first valve cover (2) is mounted at the maintenance opening.
5. A low resistance backflow preventer with an upper drain according to claim 1, wherein: A drain opening is arranged on the bottom of the main cylinder body (1), and a third valve cover (14) is mounted at the drain opening, a second drain pipe (16) is threadedly mounted at the middle position of the third valve cover (14), a water outlet piston (17) is slidingly sleeved on the outer end of the second drain pipe (16), a communication hole is arranged on the side surface of the water outlet piston (17), an end head (15) is threadedly connected at the middle position of the third valve cover (14), and the end head (15) corresponds to the position of one end of the second drain pipe (16).
6. A low resistance backflow preventer with an upper drain according to claim 2, wherein: A bend (5) is screwed at the middle axial position of the second valve cover (4), and the bend (5) corresponds to the position of one end of the upper drain pipe (10).