CN201884739U - Adjustable plastic pressure-reducing valve with double springs - Google Patents

Abstract

The utility model provides a double-spring adjustable plastic pressure reducing valve, which comprises a lower valve cover (1), a rebound spring (3), a main disc (5), a valve stem (6), a valve body (7), Diaphragm (9), adjustable spring (13), upper bonnet (15), adjusting screw (16) and sealing mechanism, the lower bonnet (1) is connected to the lower end of the valve body (7) through threaded connection , the valve stem (6) is set in the valve hole inside the valve body, its lower end is fixedly connected with the main valve disc (5), and a rebound spring is provided between the main valve disc (5) and the lower valve cover (1) (3), the upper bonnet (15) is connected to the upper end of the valve body (7) through a threaded connection, and the diaphragm (9) is arranged between the upper bonnet (15) and the valve body (7). In order to achieve sealing and pressure adjustment, an adjustable spring (13) is provided between the upper bonnet (15) and the valve stem (6), and the adjustment screw (16) is set on the top of the upper bonnet (15) , and press down against the upper end of the adjustable spring (13).

Description

A Double Spring Adjustable Plastic Pressure Relief Valve

technical field

The utility model belongs to the field of adjustable plastic pressure reducing valves in sprinkler irrigation equipment for agriculture and forestry irrigation systems, in particular to a double spring adjustable plastic pressure reducing valve.

Background technique

At present, in domestic sprinkler irrigation equipment for irrigation systems such as green spaces and gardens, the sprinkler irrigation device is generally connected directly to the sprinkler head on each branch road and different sections of the road. Because the pressure change of the water inlet of each branch road is unstable, it can be sprayed. The effect is affected, sometimes it is sprayed too far, sometimes it is sprayed too close, sometimes even no water comes out, so that water resources cannot be better utilized and saved. In recent years, a pressure reducing valve has appeared. The basic principle of the pressure reducing valve is to reduce the water pressure by the local resistance of the flow channel in the valve to the water flow. Regulate. It is precisely because of the various types of pressure reducing valves that it is difficult to choose a suitable pressure reducing valve. However, the main problem is that due to the relatively large volume, the complex structure of the parts, the complicated mold manufacturing, and the low pass rate of parts forming, The cost is higher, and the assembly is loaded down with trivial details, brings certain inconvenience to actual use.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a plastic decompression valve with simple structure and adjustable double springs.

For realizing above-mentioned utility model purpose, the technical scheme that adopts is as follows.

A double-spring adjustable plastic pressure reducing valve, including a lower valve cover (1), a rebound spring (3), a main disc (5), a valve stem (6), a valve body (7), and a diaphragm (9) , an adjustable spring (13), an upper bonnet (15), an adjusting screw (16) and a sealing mechanism, the lower bonnet (1) is connected to the lower end of the valve body (7) through a threaded connection, and the valve stem (6) It is set in the valve hole inside the valve body, and its lower end is fixedly connected with the main valve disc (5). There is a rebound spring (3) between the main valve disc (5) and the lower valve cover (1). The above bonnet (15) is connected to the upper end of the valve body (7) through threaded connection, and the diaphragm (9) is arranged at the connection between the upper bonnet (15) and the valve body (7) to realize Sealing and pressure adjustment, an adjustable spring (13) is provided between the upper valve cover (15) and the valve stem (6), and the adjustment screw (16) is set on the top of the upper valve cover (15) and pushes downward Hold the upper end of the adjustable spring (13).

In the above technical solution, the sealing mechanism includes a sealing ring (2) arranged between the lower valve cover (1) and the valve body (7), and a double sealing ring (2) arranged between the valve stem (6) and the valve body (7). Ring (8).

The lower end of the main valve disc (5) is fixedly connected with a main valve disc pressing plate (4), through which the upper end of the rebound spring (3) is connected.

The upper end of the valve stem (6) is also connected to the locking screw (12) through threaded connection, and the diaphragm (9), The unsprung plate (10) and the washer (11) to realize the tightness between the valve stem (6) and the diaphragm (9) are fixedly connected with the adjustable spring (13) at the lower end.

The lower bonnet (1), sealing ring (2), rebound spring (3), main valve disc pressure plate (4), main valve disc (5), valve stem (6), valve body (7), seal Ring (8), diaphragm (9), spring lower plate (10), washer (11), locking screw (12), adjustable spring (13), spring upper plate (14), upper valve cover (15) , The connecting axes of the adjusting screws (16) are coincident.

The valve body (7) has a cross-shaped structure, and the outer surfaces of its four ends are provided with external threads, and the inside of the valve body (7) is provided with a sealing surface (7e) that is in contact with the end surface of the main valve disc (5) to seal, and also The upper end surface (7h) and the convex groove surface (7i) of the valve body are fixed and sealed with the diaphragm end surface (9c) and the groove surface (9b) respectively, and the valve core (7k) inside the valve body (7) is in contact with the valve stem ( 6) On the same axis, two reinforcing ribs (7g) are provided on the outside of the valve core (7k), and several water outlets (7m) are provided on the upper end of the valve core (7k).

The valve stem (6) includes a cylindrical section (6a) connected to the main valve disc (4), a valve stem groove (6b) connected to the main valve disc (5), and two A sealing ring groove (6c), the lower end of the valve stem (6) is provided with an inner hexagon (6e) for easy locking by tools, and the upper end is provided with a screw hole connected with the locking screw (12), the valve stem (6) ) is also provided with reinforcing ribs (6f) in the middle of the outer surface.

Compared with the prior art, the utility model has the following beneficial effects.

1. The pressure reducing valve of the present utility model is composed of three major parts, that is, the upper and lower valve covers are respectively sleeved on the valve body through the thread structure, so that the overall structure is simple, the cost is low, and it is practical and reliable.

2. The spool assembly with built-in check valve function in the valve body of the utility model uses the valve stem, the main valve disc, the main valve disc pressure plate and the spring as the valve core, and the structure of the parts is simplified, which makes the installation quick.

3. Each component of the utility model is coaxially arranged, and through a specific water inlet setting, the water outlet and the water inlet are symmetrical on the same center line, and the pipes are connected on the same center line.

Description of drawings

Fig. 1 is a schematic structural view of the pressure reducing valve of the present invention.

Fig. 2 is a structural schematic diagram of the valve body.

Fig. 3 is a structural schematic diagram of the valve body.

Fig. 4 is a structural schematic diagram of the valve body.

Fig. 5 is a structural schematic diagram of the valve stem.

Fig. 6 is a structural schematic diagram of the valve stem.

Fig. 7 is a schematic diagram of the structure of the diaphragm.

Fig. 8 is a schematic diagram of the structure of the diaphragm.

Fig. 9 is a schematic structural view of the lower cover valve.

Fig. 10 is a structural schematic diagram of the lower cover valve.

Fig. 11 is a schematic structural view of the upper cover valve.

Fig. 12 is a structural schematic diagram of the upper cover valve.

Fig. 13 is a schematic diagram of the water flow channel of the pressure reducing valve.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described further.

As shown in Figure 1, it is the overall structure of the double-spring adjustable plastic pressure reducing valve of the present invention, which consists of a lower valve cover 1, a sealing ring 2, a rebound spring 3, a main valve disc pressing plate 4, a main valve disc 5, and a valve stem. 6. Valve body 7, sealing ring 8, diaphragm 9, spring lower plate 10, washer 11, locking screw 12, adjustable spring 13, spring upper plate 14, upper valve cover 15, and adjustment screw 16. Each component axis coincides.

As shown in Figures 2, 3, and 4, the structure of the valve body 7 is a cross-shaped structure. The four ends are respectively provided with external threads 7a, 7b, and 7c, and are provided with straight-through channels 7d, 7f, 7j, 7k, and 7l. Make it easy to take out the mold when manufacturing with an injection mold, simplify the injection mold, the sealing surface 7e of the valve body 7 and the end surface of the main valve disc 5 are in contact with each other and seal; the upper end surface 7h of the valve body 7, the convex groove surface 7i and the diaphragm end surface 9c And the groove surface 9b is better fixed and sealed; the valve core 7k inside the valve body 7 is on the same axis as the valve stem 6, and is used to guide the sliding and sealing mechanism; the two reinforcing ribs 7g of the valve core inside the valve body 7 make the inside of the valve body The spool can withstand greater water inlet pressure; several water outlets 7m inside the spool inside the valve body are used for pressure and flow control.

As shown in Figures 5 and 6, the structure of the valve stem 6 is combined with the main valve disc pressure plate 4, the main valve disc 5 and the sealing ring 8. The main valve disc 5 is set on the valve stem groove 6b, and is directly stuck in the groove to facilitate loading and unloading; the main valve disc pressure plate 4 is set on the lower end diameter 6a of the valve stem, and is arranged on the lower end surface of the main valve disc 5. Two sealing rings The groove 6c is equipped with a sealing ring 8 to make the sealing effect more remarkable, and the inner hexagon 6e is convenient to lock with a wrench; there are several reinforcing ribs 6f in the middle to make it more firm and resistant to pressure.

As shown in Figures 7 and 8, the structure of the diaphragm 9 is shown. The end face 9a is close to the end face 15b of the upper valve cover; the end faces 9b and 9c are respectively close to the upper end face 7h and the groove surface 7i of the valve body; the hemispherical shape 9e is used for The impetus of stable pressure can also make it difficult to deform when it is stretched for a long time, greatly improving its life; two small semicircles 9d are used for sealing.

As shown in Figures 9 and 10, the structure of the lower valve cover 1 is shown. The internal thread 1a is connected and fixed with the external thread 7b of the valve; the end face 1b is closely attached to the sealing ring 2; the end face 1c is closely attached to the lower end of the rebound spring 3; The first rib 1d makes loading and unloading by hand more convenient, and the hexagonal protruding post 1e further facilitates locking with a wrench.

Shown in Fig. 11,12 is the structure of upper bonnet 15, internal thread 15a is connected and fixed with valve external thread 7c; Through groove 15c is a straight-through structure, and purpose is to be convenient to demoulding when making with injection mold; Upper bonnet 15 The exterior and the lower valve cover 1 are also provided with a number of ribs 15g to facilitate manual loading and unloading, and a hexagonal structure 15h is provided to further facilitate locking with a wrench; the top of the upper valve cover 15 is inlaid with a brass material 15e to make the inside Thread 15f is more durable to be connected with adjusting screw 16.

The working process of the utility model is as follows: when the adjusting screw 16 is adjusted to the uppermost position, the adjustable spring 13 does not move and only withstands the spring upper plate 14 and the spring lower plate 10 to maintain balance, and the spring upper plate 14 is closely attached to the end surface of the upper valve cover 15d, then the rebound spring 3 will bear against the lower end of the main valve disc pressing plate 4 so that the end face of the main valve disc 5 is closely sealed with the sealing surface 7e of the valve body 7, and at this moment the pressure reducing valve remains in a static state. When the adjustment screw 16 is adjusted downward, the spring upper plate 14 moves downward under force to push the adjustable spring 13 to deform under the same force and then presses the spring lower plate 10, and the valve stem 6 also slides axially downward under the pressure, so that the main The disc 5 slowly opens, and the rebound spring 3 is subjected to the same pressure deformation and the same supporting force as the adjustable spring 13. At this time, the water flow passes through the diaphragm 9 to buffer a certain pressure difference. The outflow pressure is exactly the adjusted pressure, as shown in Figure 13, the arrow in the accompanying drawing shows the direction of the water flow channel.

Claims (7)

1. adjustable plastics reduction valve of dual spring, it is characterized in that comprising bottom flange (1), rebound spring (3), main valve clack (5), valve rod (6), valve body (7), diaphragm (9), adjustable spring (13), bonnet (15), adjusting screw (16) and sealing mechanism, described bottom flange (1) is connected by the lower end of thread connecting mode with valve body (7), described valve rod (6) is arranged in the valve opening of valve inner, fixedly connected with main valve clack (5) in its lower end, be provided with rebound spring (3) between main valve clack (5) and the bottom flange (1), described bonnet (15) is connected by the upper end of thread connecting mode with valve body (7), described diaphragm (9) is arranged on the joint of bonnet (15) between valve body (7), regulate to realize sealing and pressure, be provided with adjustable spring (13) between bonnet (15) and the valve rod (6), described adjusting screw (16) is arranged on the top of bonnet (15), and withstands the upper end of adjustable spring (13) downwards.

2. the adjustable plastics reduction valve of dual spring according to claim 1, it is characterized in that described sealing mechanism comprises the seal ring (2) that is arranged between bottom flange (1) and the valve body (7), is arranged on the double seal ring (8) between valve rod (6) and the valve body (7).

3. the adjustable plastics reduction valve of dual spring according to claim 1 and 2 is characterized in that the lower end of described main valve clack (5) is fixedly connected with main valve clack pressing plate (4), connects the upper end of rebound spring (3) by this main valve clack pressing plate (4).

4. the adjustable plastics reduction valve of dual spring according to claim 3, the upper end that it is characterized in that described valve rod (6) also is connected with lock screw (12) by thread connecting mode, between valve rod (6) and lock screw (12), set gradually diaphragm (9), spring lower wall (10) and packing ring (11) from top to bottom, fastening to realize the sealing between valve rod (6) and the diaphragm (9), described spring lower wall (10) is fixedlyed connected the lower end of adjustable spring (13) with packing ring (11).

5. the adjustable plastics reduction valve of dual spring according to claim 4 is characterized in that the connection shaft axis of dish (14), bonnet (15), adjusting screw (16) on described bottom flange (1), seal ring (2), rebound spring (3), main valve clack pressing plate (4), main valve clack (5), valve rod (6), valve body (7), seal ring (8), diaphragm (9), spring lower wall (10), packing ring (11), lock screw (12), adjustable spring (13), the spring overlaps.

6. the adjustable plastics reduction valve of dual spring according to claim 1, it is characterized in that described valve body (7) is decussate texture, its four ends outer surface is provided with outside thread, the end face that the inside of valve body (7) is provided with sealing surface (7e) and main valve clack (5) is in contact with one another sealing, also be provided with valve body upper-end surface (7h) and tongue face (7i) respectively with diaphragm end face (9c) and groove surface (9b) fixing seal, the inner spool (7k) of valve body (7) is on the same axis with valve rod (6), the outside of spool (7k) is provided with two strengthening rib (7g), and the upper end of spool (7k) is provided with several water outlets (7m).

7. the adjustable plastics reduction valve of dual spring according to claim 1, it is characterized in that described valve rod (6) comprises the cylindrical section (6a) that is connected with main valve clack pressing plate (4), the stem groove (6b) that is connected with main valve clack (5), two closure gasket grooves (6c) that are connected with seal ring (8), the lower end of valve rod (6) is provided with convenient interior hexagonal (6e) by instrument locking, the upper end then is provided with the screw hole that is connected with lock screw (12), and the outer surface intermediate portion of valve rod (6) also is provided with strengthening rib (6f).

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