CN203926815U - The special discharging valve of field irrigation - Google Patents

Abstract

The utility model discloses a special drain valve for farmland irrigation. The special drain valve for farmland irrigation comprises an upper valve body, a lower valve body, an outer sealing rubber ring and an inner sealing rubber ring; The screw rod that runs through the upper valve body and can move up and down. The outer thread on the screw rod is engaged with the inner screw hole that matches the center of the upper end cover of the upper valve body; the lower end of the screw rod is a "T"-shaped connector. A connecting plate is sleeved on the above-mentioned connecting head; the inner wall of the lower valve body is a stepped hole with a radius larger than the lower; a mounting hole is provided on the central axis of the stepped surface of the step hole, and the mounting hole is inserted into the A water-sealing plate with a "T"-shaped longitudinal section; the water-sealing plate is covered with an inner sealing rubber ring, and is fixed with the connection plate by bolts. When the T-shaped water sealing plate is moved to the small step hole of the upper valve body, the requirement of water stop under high water pressure is realized; when the T-shaped water sealing plate is moved down between the upper and lower valve bodies, it is realized The purpose of large water output under low water pressure.

Description

Special drain valve for farmland irrigation

technical field

The utility model relates to a valve, in particular to a special drain valve for farmland irrigation, which belongs to the technical field of valves.

Background technique

Agricultural irrigation mainly refers to the irrigation of agricultural farming areas. Agricultural irrigation methods can generally be divided into traditional surface irrigation, sprinkler irrigation and micro-irrigation.

In the current development of farmland irrigation, pipeline water delivery can satisfy the water output at a low pressure head of about 3m, and the irrigation conditions with good sealing performance at a high pressure head of about 30m have not yet seen similar products.

Utility model content

The purpose of this utility model is to provide a special water discharge valve for farmland irrigation to solve the sealing control of farmland irrigation when the high-pressure pipeline is used for irrigation and discharge, and to maintain a large and uniform water output when the low-pressure pipeline is used for irrigation and discharge.

The purpose of this utility model is achieved through the following technical solutions.

The special water discharge valve for farmland irrigation includes an upper valve body and a lower valve body. The outer sealing rubber ring is clamped between the upper valve body and the lower valve body and fixed by bolts; the inner wall of the upper valve body is small in radius. The lower big step hole; the side wall of the step with a smaller radius is provided with several water outlet holes; the central axis of the upper valve body is provided with a screw rod that runs through the upper valve body and can move up and down, and the outer thread on the screw rod The inner screw hole matched with the center of the upper end cover of the upper valve body is engaged; the upper end of the screw rod is higher than the upper end cover of the upper valve body, and a handwheel is fixed; the lower end of the screw rod is a "T"-shaped connector in section, the A connection plate is socketed on the connecting head; the inner wall of the lower valve body is a stepped hole with a radius larger than the lower; a mounting hole is provided on the central axis of the step surface of the step hole, and a mounting hole is inserted into the mounting hole. The longitudinal section is a "T"-shaped water sealing plate; the water sealing plate is covered with an inner sealing rubber ring, and is fixed with the connecting plate by bolts; the radius of the connecting head is smaller than the inner hole radius of the inner sealing rubber ring; The radius of the water sealing plate is smaller than the inner diameters of the upper stepped hole of the lower valve body and the lower stepped hole of the upper valve body, and larger than the inner diameters of the upper stepped hole of the upper valve body and the lower stepped hole of the lower valve body.

When the T-shaped water sealing plate is moved to the step surface of the upper valve body, the requirement of water stop under high water pressure is realized; when the T-shaped water sealing plate is moved down between the upper and lower valve bodies, it is realized Achieve the purpose of large water output under low water pressure.

The lower end of the screw rod is a "T"-shaped connector with a cross-section, and a connecting plate is sleeved on the connecting head, and the connecting plate is connected with the "T"-shaped water sealing plate with bolts. It solves the problem that the opening is difficult due to the large friction force generated by the water-stop rubber ring when opening.

The utility model has the following beneficial effects:

1. At high pressure, turn the handwheel to make the screw drive the T-shaped water sealing plate to move to the small step hole of the upper valve body, and the inner sealing rubber ring will seal with the step surface; realize the water sealing requirement under high water pressure;

2. At low pressure, move the T-shaped water sealing plate down between the upper and lower valve bodies, and the water flows from bottom to top through the side holes of the water sealing plate, so as to achieve the purpose of large and uniform water output when the water head is low .

3. Easy installation and operation, not easy to block.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the cross-sectional structure along the A-A direction of Fig. 1;

In the figure: 10, upper valve body 11, screw rod 12, hand wheel 13, connector 14, water outlet hole 15, inner sealing rubber ring 16, connection plate 20, lower valve body 21, water sealing plate 30, outer sealing rubber ring.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment further set forth the structural feature of the present utility model.

As shown in Figures 1 and 2, the water discharge valve for farmland irrigation includes an upper valve body 10 and a lower valve body 20, and an outer sealing rubber ring 30 is clamped between the upper valve body 10 and the lower valve body 20, and passes through Bolts; the inner wall of the upper valve body 10 is a step hole with a small radius and a large bottom; a number of water outlet holes 14 are provided on the side wall of the step with a smaller radius; The upper valve body 10 and the screw rod 11 that can move up and down, the outer thread on the screw rod 11 is engaged with the inner screw hole matched with the center of the upper end cover of the upper valve body 10; the upper end of the screw rod 11 is higher than the upper end cover of the upper valve body 10 , and fix a handwheel 12; the lower end of the screw rod 11 is a T-shaped connector 13, and a connecting disc 16 is sleeved on the described connector 13; the radius of the connector 13 is less than the radius of the inner hole of the inner sealing rubber ring 15; The inner wall of the lower valve body 20 is a step hole with a radius larger than the lower part; a mounting hole is arranged on the central axis of the step surface of the step hole, and a water sealing plate 21 whose longitudinal section is T-shaped is inserted in the mounting hole; The water sealing plate 21 is covered with the inner sealing rubber ring 15, and is fixed with the connection plate 16 by bolts; the radius of the connecting head 13 is smaller than the inner hole radius of the inner sealing rubber ring; the water sealing plate 21 The radius is less than the inner diameter of the upper stepped hole of the lower valve body 20 and the lower stepped hole of the upper valve body 10; the inner diameter of the upper stepped hole of the upper valve body 10 and the lower stepped hole of the lower valve body 20 is greater than the inner diameter of the radius.

The upper end of the screw rod 11 is a square tenon, which is fixed with the square hole in the center of the hand wheel 12 to provide sufficient torque.

When in use, it is installed at the end of the water discharge pipe. When the pressure is high, turn the hand wheel 12 to move the screw 11 upwards. The joint 13 of the screw 11 drives the water sealing plate 21 to move upward through the connecting plate 16. When the water sealing plate 21 moves upward to the upper valve On the stepped surface of the body 10, the inner sealing water rubber ring 16 has a reliable water sealing performance; at low pressure, the water sealing plate 21 moves down, and the water passes from bottom to top through the gap between the water sealing plate 21 and the valve body, and a large-capacity valve can be obtained. The water comes out, and the water comes out evenly.

Claims (1)

1. the special discharging valve of field irrigation, comprises upper valve body and lower valve body, clamps external sealed cushion rubber, and be bolted between described upper valve body and lower valve body; It is characterized in that: the inwall of described upper valve body is the up-small and down-big step hole of radius; On the less step sidewall of radius, be provided with some osculums; On the medial axis of described upper valve body, arrange and always put on valve body, and screw rod moving up and down, the internal thread screw interlock that the outer silk screw thread on screw rod mates with the upper end cap center of upper valve body; The upper end of screw rod exceeds the upper end cap of upper valve body, and fixes a handwheel; The lower end of screw rod is that a cross section is the connecting head of T-shape, is socketed a land on described connecting head; The inwall of described lower valve body is the up big and down small step hole of radius; On the medial axis of described step hole step surface, be provided with mounting hole, the longitudinal section of pegging graft in mounting hole is for " T " the water shutoff plate of type; On described water shutoff plate, coated with interior O-ring seal, and be bolted with land; The radius of described connecting head is less than the interior pore radius of interior O-ring seal; Described water shutoff plate radius is less than lower valve body the get out of a predicament or an embarrassing situation internal diameter in hole of hole and upper valve body of topping bar; Be greater than upper valve body the get out of a predicament or an embarrassing situation internal diameter in hole of hole and lower valve body of topping bar.