CN101963254B - Pressure-balancing valve for irrigation system - Google Patents

Abstract

The invention provides a pressure balance valve for an irrigation system, which is characterized in that: a cut-off plate and an overflow hole are arranged in the valve body connected to the water inlet and outlet pipes; The conical surface coincides with the flow hole, and a water inlet channel is arranged between the piston cylinder body and the valve body. The invention has a simple structure, can be conveniently connected to each branch pipeline of the irrigation system, and automatically balances the pressure of the water inlet to keep the flow in the irrigation pipeline consistent.

Description

An irrigation system pressure balance valve

technical field

The invention relates to a pressure balance valve of an irrigation system, in particular to a pressure adjustment applied on a small irrigation pipeline, and belongs to the technical field of irrigation equipment accessories.

Background technique

At present, the production cost of water pressure regulating equipment used in the field of agricultural micro-irrigation technology is high, and the operation is complicated in installation and use, which largely limits the popularization and application of micro-irrigation technology. The applicant once disclosed two kinds of pressure regulating devices, 1. Float-type automatic pressure regulator for irrigation: Patent No. 03257227.1. The problem exposed in use is that it depends on the buoyancy of the float to return, and the action is unstable when the water flow changes. 2. Piston-type automatic pressure regulator for irrigation, patent number 03123545.X, this pressure regulating mechanism is connected in parallel with the water flow circuit, or the piston and the water flow circuit intersect perpendicularly, the structure is complex, and the circuit and parts are added, which is prone to failure . In addition, this kind of pressure regulator is more suitable for large pipelines, and cannot meet the requirements of small irrigation systems, especially precision agriculture in greenhouses.

Contents of the invention

The purpose of the present invention is to provide a pressure balance valve with simple structure, which is suitable for installation on each irrigation system branch, so as to solve the problem of unbalanced irrigation distribution caused by unstable water pressure.

The technical solution of the present invention is to provide an irrigation system pressure balance valve, which is characterized in that: a cut-off plate and an overflow hole are arranged in the valve body connected to the water inlet and outlet pipes, and the valve core arranged in the valve body is composed of a cylinder body, a piston and a limit spring, The tapered surface at the end of the piston coincides with the flow hole, and a water inlet channel is arranged between the cylinder body of the piston and the valve body.

In the irrigation system pressure balance valve, the valve core is a stepped cylinder fixed in the valve body, and the corresponding piston is also stepped.

In the irrigation system pressure balance valve, the piston is provided with a sealing ring.

In the irrigation system pressure balance valve, the water inlet channel is a through hole or an annular hole surrounding the cylinder of the piston.

In the irrigation system pressure balance valve, the valve body is provided with a threaded or bayonet connection interface with the water inlet and outlet pipes.

In the pressure balance valve of the irrigation system, the outer diameter of the interface between the valve body and the water inlet and outlet pipes is provided with 1-5 anti-off-ring ring ratchets and a self-locking locking ring with ring ratchets on the inner diameter. .

In the irrigation system pressure balance valve, the outer diameter of the tooth top of the annular ratchet on the valve body interface is larger than the inner diameter of the tooth top of the annular ratchet on the locking ring.

For the irrigation system pressure balance valve, the outer diameter of the tooth tops of the annular ratchets on the valve body interface increases sequentially, or the inner diameter of the tooth tops of the annular ratchets on the self-locking locking ring decreases sequentially.

The beneficial effect produced by the invention is that it can be conveniently connected to each branch pipeline of the irrigation system, and the water inlet pressure can be automatically balanced to keep the flow in the irrigation pipeline consistent.

Description of drawings

Fig. 1 is a sectional view of the pressure balance valve of the irrigation system of the present invention

Figure 2 is the A-A view of Figure 1

Fig. 3 is a partial perspective view of the pressure balance valve of the irrigation system of the present invention

Figure 4 is a connection method between the valve body of the pressure balance valve and the water inlet and outlet pipelines

In the figure: 1. Thread 2. Valve body 3. Water inlet channel 4. Seal ring 5. Limit spring 6. Piston 7. Seal 8. Throttle plate 9. Flow hole 10. Cylinder body 11. Interface 12. Lock Tight ring 13, locking ring ring ratchet 14, thin-walled tube 15, interface ring ratchet

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1-3, the pressure balance valve of the irrigation system is provided with threads or bayonets connecting the inlet and outlet pipes on the left and right, and the interceptor plate 8 and the flow hole 9 are arranged in the valve body 2, and the valve core of the present invention is a cylinder arranged in the valve body. Body, piston 6 and limit spring 5, the tapered surface at the end of the piston coincides with the flow hole, and a water inlet channel 3 is arranged between the piston cylinder and the valve body.

The valve core is a stepped cylinder fixed in the valve body, and the corresponding piston 6 is also stepped. When water flows into the balance valve, pressure is formed on the piston 6. When the water pressure is small, the piston remains motionless under the support of the limit spring 5. When the water pressure gradually increases, the pressure formed by the water flow on the piston gradually increases, exceeding the spring. After yielding the pressure, push the piston to move to the right, so that the conical surface of the small head of the piston gradually moves to the flow hole 9 of the throttle plate 8 until it is inserted into the flow hole.

When the water pressure increases, when the cone surface of the small head of the piston gradually moves to the flow hole of the throttle plate, the cross section of the water flow channel flowing through the cavity to the flow hole gradually decreases, so that the pressure of the water outlet on the right side of the balance valve remains balanced. The piston is provided with sealing rings 4,7.

The technical solution of the water inlet passage 3 provided by the present invention is a through hole or an annular hole surrounding the piston cylinder.

In order to solve the connection problem between the valve body and the thin-walled irrigation hose, Fig. 4 shows an extension technical scheme of a connection mode between the valve body and the water inlet and outlet pipelines of the present invention. The outer diameter of the valve body interface 11 is provided with an anti-loosening ring ratchet 15. A self-locking locking ring 12 with annular ratchet 13 in the inner diameter is pre-set. After the thin-walled hose 14 is sleeved on the valve body interface 11, the locking ring 12 is pulled back toward the interface, and the annular ratchet is about to lock the thin-walled pipe on the valve body.

Wherein, the outer diameter of the tooth top of the annular ratchet 15 on the valve body interface 11 is larger than the inner diameter of the tooth top of the annular ratchet 13 on the locking ring 12 .

The external diameters of the tooth tops of the annular ratchet 15 on the valve body interface can be designed to be equal or increase sequentially from left to right. Or the inner diameters of the tooth tops of the annular ratchets on the inner diameter of the self-locking locking ring 12 are designed to be equal or successively reduced.

The above description is only proposed as an implementable technical solution of the irrigation system pressure balance valve of the present invention, not as a single restriction on the technical solution itself.

Claims (7)

1. A pressure balance valve for an irrigation system, which is characterized in that: a cut-off plate (8) and a flow hole (9) are arranged in the valve body (2) connected to the water inlet and outlet pipes, and the valve core arranged in the valve body is controlled by the cylinder body (10) , consisting of a piston (6) and a limit spring (5), the conical surface at the end of the piston coincides with the flow hole, and a water inlet channel (3) is arranged between the piston cylinder and the valve body; the cylinder is fixed on The stepped cylinder block (10) in the valve body is also stepped in the corresponding piston (6). 2. The irrigation system pressure balance valve according to claim 1, characterized in that: the piston is provided with sealing rings (4, 7). 3. The irrigation system pressure balance valve according to claim 1, characterized in that: the water inlet channel (3) is a through hole surrounding the piston cylinder (10). 4. The irrigation system pressure balance valve according to claim 1, characterized in that: the valve body is provided with an interface (11) connecting the inlet and outlet pipes with threads or bayonets. 5. The irrigation system pressure balance valve according to claim 4, characterized in that: 1-5 ring-shaped ratchets (13) are provided on the outer diameter of the interface (11) connecting the valve body with the water inlet and outlet pipes A self-locking locking ring (12) with annular ratchets (15) is provided with the inner diameter of the suit. 6. The irrigation system pressure balance valve according to claim 5, characterized in that: the outer diameter of the annular ratchet tooth top on the valve body interface is larger than the inner diameter of the annular ratchet tooth on the self-locking locking ring top inner diameter. 7. The pressure balance valve for irrigation system according to claim 5, characterized in that: the outer diameter of the ring-shaped ratchet top on the valve body interface increases sequentially, or the inner diameter of the self-locking locking ring rings The inner diameter of the tooth top of the ratchet decreases successively.

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