CN201810842U - An irrigation system pressure balance valve - Google Patents

Abstract

The utility model 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 a valve body connected to an inlet and outlet pipe; a valve core arranged in the valve body is composed of a cylinder body, a piston and a limit spring; The tapered surface of the valve coincides with the flow hole, and a water inlet channel is arranged between the piston cylinder and the valve body. The utility model has a simple structure, can be conveniently connected to each branch pipeline of the irrigation system, and automatically balances the water inlet pressure to keep the flow rate in the irrigation pipeline consistent.

Description

An irrigation system pressure balance valve

technical field

The utility model relates to a pressure balance valve for 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. the

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. the

Contents of the invention

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

The technical solution of the utility model is to provide a pressure balance valve for irrigation system, which is characterized in that: a cut-off plate and an overflow hole are set in the valve body connected to the water inlet and outlet pipes, and the valve core set 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 piston cylinder and the valve body. the

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. the

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

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. the

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. the

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. . the

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. the

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

The beneficial effect of the utility model 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 rate in the irrigation pipeline consistent. the

Description of drawings

Figure 1 is a sectional view of the pressure balance valve of the utility model irrigation system

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 utility model

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

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail. the

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 utility model is arranged in the valve body. The cylinder body, the piston 6 and the limit spring 5, the tapered surface at the end of the piston coincides with the flow hole, and the water inlet channel 3 is arranged between the piston cylinder body and the valve body. the

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. the

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

The technical proposal of the water inlet channel 3 provided by the utility model is a through hole or an annular hole surrounding the piston cylinder. the

In order to solve the connection problem between the valve body and the irrigation thin-walled hose, Figure 4 shows an extension technical scheme of a connection mode between the valve body and the water inlet and outlet pipelines of the utility model, and an anti-loosening annular spine is set on the outer diameter of the valve body interface 11 Teeth 15, a self-locking locking ring 12 with annular ratchets 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. the

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

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

The above description is only proposed as an implementable technical solution for the pressure balance valve of the irrigation system of the present utility model, and not as a single restrictive condition for the technical solution itself. the

Claims (8)

1. irrigation system equilibrated valve, its feature comprises: in the valve body (2) of connection turnover water pipe intercepter plate (8) and flowing hole (9) are set, the spool that is provided with in the valve body is by cylinder body (10), piston (6) and limit spring (5) are formed, the conical surface of pistons end and flowing hole coincide, and are provided with intake tunnel (3) between piston/cylinder and the valve body.

2. irrigation system equilibrated valve according to claim 1 is characterized in that: described spool is for being fixed on stepped shaft cylinder body (10) in the valve body, and corresponding piston (6) also is a stepped shaft.

3. irrigation system equilibrated valve according to claim 2 is characterized in that: described piston is provided with seal ring (4,7).

4. irrigation system equilibrated valve according to claim 1 is characterized in that: described intake tunnel (3) is to be looped around piston/cylinder (10) through hole or annular aperture on every side.

5. irrigation system equilibrated valve according to claim 1 is characterized in that: described valve body setting and turnover water pipe connection interface (11) are screw thread or bayonet socket.

6. irrigation system equilibrated valve according to claim 5 is characterized in that: the self-locking locking ring (12) that the anti-decylization annular ratchet (13) in 1-5 road and internal diameter of suit are provided with annular ratchet (15) is set on the external diameter of the interface that described valve body is connected with turnover water pipe (11).

7. irrigation system equilibrated valve according to claim 5 is characterized in that: the annular ratchet tooth top external diameter on the described described valve body interface is greater than the annular of the internal diameter on locking ring ratchet tooth top internal diameter.

8. irrigation system equilibrated valve according to claim 5 is characterized in that: the annular ratchet tooth top external diameter on the described described valve body interface increases successively, or the internal diameter of self-locking locking ring annular ratchet tooth top internal diameter dwindles successively.

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